diff options
52 files changed, 6259 insertions, 430 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 9a91d9e..0df29ce 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2561,12 +2561,18 @@ L: linux-kernel@vger.kernel.org W: http://www.atnf.csiro.au/~rgooch/linux/kernel-patches.html S: Maintained -MULTIMEDIA CARD (MMC) AND SECURE DIGITAL (SD) SUBSYSTEM +MULTIMEDIA CARD (MMC), SECURE DIGITAL (SD) AND SDIO SUBSYSTEM P: Pierre Ossman M: drzeus-mmc@drzeus.cx L: linux-kernel@vger.kernel.org S: Maintained +MULTIMEDIA CARD (MMC) ETC. OVER SPI +P: David Brownell +M: dbrownell@users.sourceforge.net +L: linux-kernel@vger.kernel.org +S: Odd fixes + MULTISOUND SOUND DRIVER P: Andrew Veliath M: andrewtv@usa.net diff --git a/arch/arm/mach-imx/mx1ads.c b/arch/arm/mach-imx/mx1ads.c index da893c8..a9778c1 100644 --- a/arch/arm/mach-imx/mx1ads.c +++ b/arch/arm/mach-imx/mx1ads.c @@ -116,7 +116,7 @@ static struct platform_device *devices[] __initdata = { }; #ifdef CONFIG_MMC_IMX -static int mx1ads_mmc_card_present(void) +static int mx1ads_mmc_card_present(struct device *dev) { /* MMC/SD Card Detect is PB 20 on MX1ADS V1.0.7 */ return (SSR(1) & (1 << 20) ? 0 : 1); diff --git a/drivers/mmc/card/Kconfig b/drivers/mmc/card/Kconfig index a49cb97..aa8a4e4 100644 --- a/drivers/mmc/card/Kconfig +++ b/drivers/mmc/card/Kconfig @@ -32,3 +32,10 @@ config MMC_BLOCK_BOUNCE If unsure, say Y here. +config SDIO_UART + tristate "SDIO UART/GPS class support" + depends on MMC + help + SDIO function driver for SDIO cards that implements the UART + class, as well as the GPS class which appears like a UART. + diff --git a/drivers/mmc/card/Makefile b/drivers/mmc/card/Makefile index cf8c939..fc5a784 100644 --- a/drivers/mmc/card/Makefile +++ b/drivers/mmc/card/Makefile @@ -9,3 +9,5 @@ endif obj-$(CONFIG_MMC_BLOCK) += mmc_block.o mmc_block-objs := block.o queue.o +obj-$(CONFIG_SDIO_UART) += sdio_uart.o + diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index 93fe2e5..e38d5a3 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -151,17 +151,19 @@ static u32 mmc_sd_num_wr_blocks(struct mmc_card *card) cmd.opcode = MMC_APP_CMD; cmd.arg = card->rca << 16; - cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; + cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; err = mmc_wait_for_cmd(card->host, &cmd, 0); - if ((err != MMC_ERR_NONE) || !(cmd.resp[0] & R1_APP_CMD)) + if (err) + return (u32)-1; + if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD)) return (u32)-1; memset(&cmd, 0, sizeof(struct mmc_command)); cmd.opcode = SD_APP_SEND_NUM_WR_BLKS; cmd.arg = 0; - cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; + cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; memset(&data, 0, sizeof(struct mmc_data)); @@ -192,7 +194,7 @@ static u32 mmc_sd_num_wr_blocks(struct mmc_card *card) mmc_wait_for_req(card->host, &mrq); - if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) + if (cmd.error || data.error) return (u32)-1; blocks = ntohl(blocks); @@ -220,17 +222,15 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) brq.cmd.arg = req->sector; if (!mmc_card_blockaddr(card)) brq.cmd.arg <<= 9; - brq.cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; + brq.cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; brq.data.blksz = 1 << md->block_bits; brq.stop.opcode = MMC_STOP_TRANSMISSION; brq.stop.arg = 0; - brq.stop.flags = MMC_RSP_R1B | MMC_CMD_AC; + brq.stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; brq.data.blocks = req->nr_sectors >> (md->block_bits - 9); if (brq.data.blocks > card->host->max_blk_count) brq.data.blocks = card->host->max_blk_count; - mmc_set_data_timeout(&brq.data, card, rq_data_dir(req) != READ); - /* * If the host doesn't support multiple block writes, force * block writes to single block. SD cards are excepted from @@ -243,8 +243,12 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) brq.data.blocks = 1; if (brq.data.blocks > 1) { - brq.data.flags |= MMC_DATA_MULTI; - brq.mrq.stop = &brq.stop; + /* SPI multiblock writes terminate using a special + * token, not a STOP_TRANSMISSION request. + */ + if (!mmc_host_is_spi(card->host) + || rq_data_dir(req) == READ) + brq.mrq.stop = &brq.stop; readcmd = MMC_READ_MULTIPLE_BLOCK; writecmd = MMC_WRITE_MULTIPLE_BLOCK; } else { @@ -261,6 +265,8 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) brq.data.flags |= MMC_DATA_WRITE; } + mmc_set_data_timeout(&brq.data, card); + brq.data.sg = mq->sg; brq.data.sg_len = mmc_queue_map_sg(mq); @@ -302,7 +308,7 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) goto cmd_err; } - if (rq_data_dir(req) != READ) { + if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) { do { int err; @@ -510,7 +516,7 @@ mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card) mmc_claim_host(card->host); cmd.opcode = MMC_SET_BLOCKLEN; cmd.arg = 1 << md->block_bits; - cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; + cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; err = mmc_wait_for_cmd(card->host, &cmd, 5); mmc_release_host(card->host); diff --git a/drivers/mmc/card/sdio_uart.c b/drivers/mmc/card/sdio_uart.c new file mode 100644 index 0000000..d552de6 --- /dev/null +++ b/drivers/mmc/card/sdio_uart.c @@ -0,0 +1,1158 @@ +/* + * linux/drivers/mmc/card/sdio_uart.c - SDIO UART/GPS driver + * + * Based on drivers/serial/8250.c and drivers/serial/serial_core.c + * by Russell King. + * + * Author: Nicolas Pitre + * Created: June 15, 2007 + * Copyright: MontaVista Software, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +/* + * Note: Although this driver assumes a 16550A-like UART implementation, + * it is not possible to leverage the common 8250/16550 driver, nor the + * core UART infrastructure, as they assumes direct access to the hardware + * registers, often under a spinlock. This is not possible in the SDIO + * context as SDIO access functions must be able to sleep. + * + * Because we need to lock the SDIO host to ensure an exclusive access to + * the card, we simply rely on that lock to also prevent and serialize + * concurrent access to the same port. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/mutex.h> +#include <linux/serial_reg.h> +#include <linux/circ_buf.h> +#include <linux/gfp.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> + +#include <linux/mmc/core.h> +#include <linux/mmc/card.h> +#include <linux/mmc/sdio_func.h> +#include <linux/mmc/sdio_ids.h> + + +#define UART_NR 8 /* Number of UARTs this driver can handle */ + + +#define UART_XMIT_SIZE PAGE_SIZE +#define WAKEUP_CHARS 256 + +#define circ_empty(circ) ((circ)->head == (circ)->tail) +#define circ_clear(circ) ((circ)->head = (circ)->tail = 0) + +#define circ_chars_pending(circ) \ + (CIRC_CNT((circ)->head, (circ)->tail, UART_XMIT_SIZE)) + +#define circ_chars_free(circ) \ + (CIRC_SPACE((circ)->head, (circ)->tail, UART_XMIT_SIZE)) + + +struct uart_icount { + __u32 cts; + __u32 dsr; + __u32 rng; + __u32 dcd; + __u32 rx; + __u32 tx; + __u32 frame; + __u32 overrun; + __u32 parity; + __u32 brk; +}; + +struct sdio_uart_port { + struct kref kref; + struct tty_struct *tty; + unsigned int index; + unsigned int opened; + struct mutex open_lock; + struct sdio_func *func; + struct mutex func_lock; + struct task_struct *in_sdio_uart_irq; + unsigned int regs_offset; + struct circ_buf xmit; + spinlock_t write_lock; + struct uart_icount icount; + unsigned int uartclk; + unsigned int mctrl; + unsigned int read_status_mask; + unsigned int ignore_status_mask; + unsigned char x_char; + unsigned char ier; + unsigned char lcr; +}; + +static struct sdio_uart_port *sdio_uart_table[UART_NR]; +static DEFINE_SPINLOCK(sdio_uart_table_lock); + +static int sdio_uart_add_port(struct sdio_uart_port *port) +{ + int index, ret = -EBUSY; + + kref_init(&port->kref); + mutex_init(&port->open_lock); + mutex_init(&port->func_lock); + spin_lock_init(&port->write_lock); + + spin_lock(&sdio_uart_table_lock); + for (index = 0; index < UART_NR; index++) { + if (!sdio_uart_table[index]) { + port->index = index; + sdio_uart_table[index] = port; + ret = 0; + break; + } + } + spin_unlock(&sdio_uart_table_lock); + + return ret; +} + +static struct sdio_uart_port *sdio_uart_port_get(unsigned index) +{ + struct sdio_uart_port *port; + + if (index >= UART_NR) + return NULL; + + spin_lock(&sdio_uart_table_lock); + port = sdio_uart_table[index]; + if (port) + kref_get(&port->kref); + spin_unlock(&sdio_uart_table_lock); + + return port; +} + +static void sdio_uart_port_destroy(struct kref *kref) +{ + struct sdio_uart_port *port = + container_of(kref, struct sdio_uart_port, kref); + kfree(port); +} + +static void sdio_uart_port_put(struct sdio_uart_port *port) +{ + kref_put(&port->kref, sdio_uart_port_destroy); +} + +static void sdio_uart_port_remove(struct sdio_uart_port *port) +{ + struct sdio_func *func; + + BUG_ON(sdio_uart_table[port->index] != port); + + spin_lock(&sdio_uart_table_lock); + sdio_uart_table[port->index] = NULL; + spin_unlock(&sdio_uart_table_lock); + + /* + * We're killing a port that potentially still is in use by + * the tty layer. Be careful to prevent any further access + * to the SDIO function and arrange for the tty layer to + * give up on that port ASAP. + * Beware: the lock ordering is critical. + */ + mutex_lock(&port->open_lock); + mutex_lock(&port->func_lock); + func = port->func; + sdio_claim_host(func); + port->func = NULL; + mutex_unlock(&port->func_lock); + if (port->opened) + tty_hangup(port->tty); + mutex_unlock(&port->open_lock); + sdio_release_irq(func); + sdio_disable_func(func); + sdio_release_host(func); + + sdio_uart_port_put(port); +} + +static int sdio_uart_claim_func(struct sdio_uart_port *port) +{ + mutex_lock(&port->func_lock); + if (unlikely(!port->func)) { + mutex_unlock(&port->func_lock); + return -ENODEV; + } + if (likely(port->in_sdio_uart_irq != current)) + sdio_claim_host(port->func); + mutex_unlock(&port->func_lock); + return 0; +} + +static inline void sdio_uart_release_func(struct sdio_uart_port *port) +{ + if (likely(port->in_sdio_uart_irq != current)) + sdio_release_host(port->func); +} + +static inline unsigned int sdio_in(struct sdio_uart_port *port, int offset) +{ + unsigned char c; + c = sdio_readb(port->func, port->regs_offset + offset, NULL); + return c; +} + +static inline void sdio_out(struct sdio_uart_port *port, int offset, int value) +{ + sdio_writeb(port->func, value, port->regs_offset + offset, NULL); +} + +static unsigned int sdio_uart_get_mctrl(struct sdio_uart_port *port) +{ + unsigned char status; + unsigned int ret; + + status = sdio_in(port, UART_MSR); + + ret = 0; + if (status & UART_MSR_DCD) + ret |= TIOCM_CAR; + if (status & UART_MSR_RI) + ret |= TIOCM_RNG; + if (status & UART_MSR_DSR) + ret |= TIOCM_DSR; + if (status & UART_MSR_CTS) + ret |= TIOCM_CTS; + return ret; +} + +static void sdio_uart_write_mctrl(struct sdio_uart_port *port, unsigned int mctrl) +{ + unsigned char mcr = 0; + + if (mctrl & TIOCM_RTS) + mcr |= UART_MCR_RTS; + if (mctrl & TIOCM_DTR) + mcr |= UART_MCR_DTR; + if (mctrl & TIOCM_OUT1) + mcr |= UART_MCR_OUT1; + if (mctrl & TIOCM_OUT2) + mcr |= UART_MCR_OUT2; + if (mctrl & TIOCM_LOOP) + mcr |= UART_MCR_LOOP; + + sdio_out(port, UART_MCR, mcr); +} + +static inline void sdio_uart_update_mctrl(struct sdio_uart_port *port, + unsigned int set, unsigned int clear) +{ + unsigned int old; + + old = port->mctrl; + port->mctrl = (old & ~clear) | set; + if (old != port->mctrl) + sdio_uart_write_mctrl(port, port->mctrl); +} + +#define sdio_uart_set_mctrl(port, x) sdio_uart_update_mctrl(port, x, 0) +#define sdio_uart_clear_mctrl(port, x) sdio_uart_update_mctrl(port, 0, x) + +static void sdio_uart_change_speed(struct sdio_uart_port *port, + struct ktermios *termios, + struct ktermios *old) +{ + unsigned char cval, fcr = 0; + unsigned int baud, quot; + + switch (termios->c_cflag & CSIZE) { + case CS5: + cval = UART_LCR_WLEN5; + break; + case CS6: + cval = UART_LCR_WLEN6; + break; + case CS7: + cval = UART_LCR_WLEN7; + break; + default: + case CS8: + cval = UART_LCR_WLEN8; + break; + } + + if (termios->c_cflag & CSTOPB) + cval |= UART_LCR_STOP; + if (termios->c_cflag & PARENB) + cval |= UART_LCR_PARITY; + if (!(termios->c_cflag & PARODD)) + cval |= UART_LCR_EPAR; + + for (;;) { + baud = tty_termios_baud_rate(termios); + if (baud == 0) + baud = 9600; /* Special case: B0 rate. */ + if (baud <= port->uartclk) + break; + /* + * Oops, the quotient was zero. Try again with the old + * baud rate if possible, otherwise default to 9600. + */ + termios->c_cflag &= ~CBAUD; + if (old) { + termios->c_cflag |= old->c_cflag & CBAUD; + old = NULL; + } else + termios->c_cflag |= B9600; + } + quot = (2 * port->uartclk + baud) / (2 * baud); + + if (baud < 2400) + fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1; + else + fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10; + + port->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; + if (termios->c_iflag & INPCK) + port->read_status_mask |= UART_LSR_FE | UART_LSR_PE; + if (termios->c_iflag & (BRKINT | PARMRK)) + port->read_status_mask |= UART_LSR_BI; + + /* + * Characters to ignore + */ + port->ignore_status_mask = 0; + if (termios->c_iflag & IGNPAR) + port->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; + if (termios->c_iflag & IGNBRK) { + port->ignore_status_mask |= UART_LSR_BI; + /* + * If we're ignoring parity and break indicators, + * ignore overruns too (for real raw support). + */ + if (termios->c_iflag & IGNPAR) + port->ignore_status_mask |= UART_LSR_OE; + } + + /* + * ignore all characters if CREAD is not set + */ + if ((termios->c_cflag & CREAD) == 0) + port->ignore_status_mask |= UART_LSR_DR; + + /* + * CTS flow control flag and modem status interrupts + */ + port->ier &= ~UART_IER_MSI; + if ((termios->c_cflag & CRTSCTS) || !(termios->c_cflag & CLOCAL)) + port->ier |= UART_IER_MSI; + + port->lcr = cval; + + sdio_out(port, UART_IER, port->ier); + sdio_out(port, UART_LCR, cval | UART_LCR_DLAB); + sdio_out(port, UART_DLL, quot & 0xff); + sdio_out(port, UART_DLM, quot >> 8); + sdio_out(port, UART_LCR, cval); + sdio_out(port, UART_FCR, fcr); + + sdio_uart_write_mctrl(port, port->mctrl); +} + +static void sdio_uart_start_tx(struct sdio_uart_port *port) +{ + if (!(port->ier & UART_IER_THRI)) { + port->ier |= UART_IER_THRI; + sdio_out(port, UART_IER, port->ier); + } +} + +static void sdio_uart_stop_tx(struct sdio_uart_port *port) +{ + if (port->ier & UART_IER_THRI) { + port->ier &= ~UART_IER_THRI; + sdio_out(port, UART_IER, port->ier); + } +} + +static void sdio_uart_stop_rx(struct sdio_uart_port *port) +{ + port->ier &= ~UART_IER_RLSI; + port->read_status_mask &= ~UART_LSR_DR; + sdio_out(port, UART_IER, port->ier); +} + +static void sdio_uart_receive_chars(struct sdio_uart_port *port, int *status) +{ + struct tty_struct *tty = port->tty; + unsigned int ch, flag; + int max_count = 256; + + do { + ch = sdio_in(port, UART_RX); + flag = TTY_NORMAL; + port->icount.rx++; + + if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE | + UART_LSR_FE | UART_LSR_OE))) { + /* + * For statistics only + */ + if (*status & UART_LSR_BI) { + *status &= ~(UART_LSR_FE | UART_LSR_PE); + port->icount.brk++; + } else if (*status & UART_LSR_PE) + port->icount.parity++; + else if (*status & UART_LSR_FE) + port->icount.frame++; + if (*status & UART_LSR_OE) + port->icount.overrun++; + + /* + * Mask off conditions which should be ignored. + */ + *status &= port->read_status_mask; + if (*status & UART_LSR_BI) { + flag = TTY_BREAK; + } else if (*status & UART_LSR_PE) + flag = TTY_PARITY; + else if (*status & UART_LSR_FE) + flag = TTY_FRAME; + } + + if ((*status & port->ignore_status_mask & ~UART_LSR_OE) == 0) + tty_insert_flip_char(tty, ch, flag); + + /* + * Overrun is special. Since it's reported immediately, + * it doesn't affect the current character. + */ + if (*status & ~port->ignore_status_mask & UART_LSR_OE) + tty_insert_flip_char(tty, 0, TTY_OVERRUN); + + *status = sdio_in(port, UART_LSR); + } while ((*status & UART_LSR_DR) && (max_count-- > 0)); + tty_flip_buffer_push(tty); +} + +static void sdio_uart_transmit_chars(struct sdio_uart_port *port) +{ + struct circ_buf *xmit = &port->xmit; + int count; + + if (port->x_char) { + sdio_out(port, UART_TX, port->x_char); + port->icount.tx++; + port->x_char = 0; + return; + } + if (circ_empty(xmit) || port->tty->stopped || port->tty->hw_stopped) { + sdio_uart_stop_tx(port); + return; + } + + count = 16; + do { + sdio_out(port, UART_TX, xmit->buf[xmit->tail]); + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + port->icount.tx++; + if (circ_empty(xmit)) + break; + } while (--count > 0); + + if (circ_chars_pending(xmit) < WAKEUP_CHARS) + tty_wakeup(port->tty); + + if (circ_empty(xmit)) + sdio_uart_stop_tx(port); +} + +static void sdio_uart_check_modem_status(struct sdio_uart_port *port) +{ + int status; + + status = sdio_in(port, UART_MSR); + + if ((status & UART_MSR_ANY_DELTA) == 0) + return; + + if (status & UART_MSR_TERI) + port->icount.rng++; + if (status & UART_MSR_DDSR) + port->icount.dsr++; + if (status & UART_MSR_DDCD) + port->icount.dcd++; + if (status & UART_MSR_DCTS) { + port->icount.cts++; + if (port->tty->termios->c_cflag & CRTSCTS) { + int cts = (status & UART_MSR_CTS); + if (port->tty->hw_stopped) { + if (cts) { + port->tty->hw_stopped = 0; + sdio_uart_start_tx(port); + tty_wakeup(port->tty); + } + } else { + if (!cts) { + port->tty->hw_stopped = 1; + sdio_uart_stop_tx(port); + } + } + } + } +} + +/* + * This handles the interrupt from one port. + */ +static void sdio_uart_irq(struct sdio_func *func) +{ + struct sdio_uart_port *port = sdio_get_drvdata(func); + unsigned int iir, lsr; + + /* + * In a few places sdio_uart_irq() is called directly instead of + * waiting for the actual interrupt to be raised and the SDIO IRQ + * thread scheduled in order to reduce latency. However, some + * interaction with the tty core may end up calling us back + * (serial echo, flow control, etc.) through those same places + * causing undesirable effects. Let's stop the recursion here. + */ + if (unlikely(port->in_sdio_uart_irq == current)) + return; + + iir = sdio_in(port, UART_IIR); + if (iir & UART_IIR_NO_INT) + return; + + port->in_sdio_uart_irq = current; + lsr = sdio_in(port, UART_LSR); + if (lsr & UART_LSR_DR) + sdio_uart_receive_chars(port, &lsr); + sdio_uart_check_modem_status(port); + if (lsr & UART_LSR_THRE) + sdio_uart_transmit_chars(port); + port->in_sdio_uart_irq = NULL; +} + +static int sdio_uart_startup(struct sdio_uart_port *port) +{ + unsigned long page; + int ret; + + /* + * Set the TTY IO error marker - we will only clear this + * once we have successfully opened the port. + */ + set_bit(TTY_IO_ERROR, &port->tty->flags); + + /* Initialise and allocate the transmit buffer. */ + page = __get_free_page(GFP_KERNEL); + if (!page) + return -ENOMEM; + port->xmit.buf = (unsigned char *)page; + circ_clear(&port->xmit); + + ret = sdio_uart_claim_func(port); + if (ret) + goto err1; + ret = sdio_enable_func(port->func); + if (ret) + goto err2; + ret = sdio_claim_irq(port->func, sdio_uart_irq); + if (ret) + goto err3; + + /* + * Clear the FIFO buffers and disable them. + * (they will be reenabled in sdio_change_speed()) + */ + sdio_out(port, UART_FCR, UART_FCR_ENABLE_FIFO); + sdio_out(port, UART_FCR, UART_FCR_ENABLE_FIFO | + UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); + sdio_out(port, UART_FCR, 0); + + /* + * Clear the interrupt registers. + */ + (void) sdio_in(port, UART_LSR); + (void) sdio_in(port, UART_RX); + (void) sdio_in(port, UART_IIR); + (void) sdio_in(port, UART_MSR); + + /* + * Now, initialize the UART + */ + sdio_out(port, UART_LCR, UART_LCR_WLEN8); + + port->ier = UART_IER_RLSI | UART_IER_RDI | UART_IER_RTOIE | UART_IER_UUE; + port->mctrl = TIOCM_OUT2; + + sdio_uart_change_speed(port, port->tty->termios, NULL); + + if (port->tty->termios->c_cflag & CBAUD) + sdio_uart_set_mctrl(port, TIOCM_RTS | TIOCM_DTR); + + if (port->tty->termios->c_cflag & CRTSCTS) + if (!(sdio_uart_get_mctrl(port) & TIOCM_CTS)) + port->tty->hw_stopped = 1; + + clear_bit(TTY_IO_ERROR, &port->tty->flags); + + /* Kick the IRQ handler once while we're still holding the host lock */ + sdio_uart_irq(port->func); + + sdio_uart_release_func(port); + return 0; + +err3: + sdio_disable_func(port->func); +err2: + sdio_uart_release_func(port); +err1: + free_page((unsigned long)port->xmit.buf); + return ret; +} + +static void sdio_uart_shutdown(struct sdio_uart_port *port) +{ + int ret; + + ret = sdio_uart_claim_func(port); + if (ret) + goto skip; + + sdio_uart_stop_rx(port); + + /* TODO: wait here for TX FIFO to drain */ + + /* Turn off DTR and RTS early. */ + if (port->tty->termios->c_cflag & HUPCL) + sdio_uart_clear_mctrl(port, TIOCM_DTR | TIOCM_RTS); + + /* Disable interrupts from this port */ + sdio_release_irq(port->func); + port->ier = 0; + sdio_out(port, UART_IER, 0); + + sdio_uart_clear_mctrl(port, TIOCM_OUT2); + + /* Disable break condition and FIFOs. */ + port->lcr &= ~UART_LCR_SBC; + sdio_out(port, UART_LCR, port->lcr); + sdio_out(port, UART_FCR, UART_FCR_ENABLE_FIFO | + UART_FCR_CLEAR_RCVR | + UART_FCR_CLEAR_XMIT); + sdio_out(port, UART_FCR, 0); + + sdio_disable_func(port->func); + + sdio_uart_release_func(port); + +skip: + /* Free the transmit buffer page. */ + free_page((unsigned long)port->xmit.buf); +} + +static int sdio_uart_open (struct tty_struct *tty, struct file * filp) +{ + struct sdio_uart_port *port; + int ret; + + port = sdio_uart_port_get(tty->index); + if (!port) + return -ENODEV; + + mutex_lock(&port->open_lock); + + /* + * Make sure not to mess up with a dead port + * which has not been closed yet. + */ + if (tty->driver_data && tty->driver_data != port) { + mutex_unlock(&port->open_lock); + sdio_uart_port_put(port); + return -EBUSY; + } + + if (!port->opened) { + tty->driver_data = port; + port->tty = tty; + ret = sdio_uart_startup(port); + if (ret) { + tty->driver_data = NULL; + port->tty = NULL; + mutex_unlock(&port->open_lock); + sdio_uart_port_put(port); + return ret; + } + } + port->opened++; + mutex_unlock(&port->open_lock); + return 0; +} + +static void sdio_uart_close(struct tty_struct *tty, struct file * filp) +{ + struct sdio_uart_port *port = tty->driver_data; + + if (!port) + return; + + mutex_lock(&port->open_lock); + BUG_ON(!port->opened); + + /* + * This is messy. The tty layer calls us even when open() + * returned an error. Ignore this close request if tty->count + * is larger than port->count. + */ + if (tty->count > port->opened) { + mutex_unlock(&port->open_lock); + return; + } + + if (--port->opened == 0) { + tty->closing = 1; + sdio_uart_shutdown(port); + tty_ldisc_flush(tty); + port->tty = NULL; + tty->driver_data = NULL; + tty->closing = 0; + } + mutex_unlock(&port->open_lock); + sdio_uart_port_put(port); +} + +static int sdio_uart_write(struct tty_struct * tty, const unsigned char *buf, + int count) +{ + struct sdio_uart_port *port = tty->driver_data; + struct circ_buf *circ = &port->xmit; + int c, ret = 0; + + if (!port->func) + return -ENODEV; + + spin_lock(&port->write_lock); + while (1) { + c = CIRC_SPACE_TO_END(circ->head, circ->tail, UART_XMIT_SIZE); + if (count < c) + c = count; + if (c <= 0) + break; + memcpy(circ->buf + circ->head, buf, c); + circ->head = (circ->head + c) & (UART_XMIT_SIZE - 1); + buf += c; + count -= c; + ret += c; + } + spin_unlock(&port->write_lock); + + if ( !(port->ier & UART_IER_THRI)) { + int err = sdio_uart_claim_func(port); + if (!err) { + sdio_uart_start_tx(port); + sdio_uart_irq(port->func); + sdio_uart_release_func(port); + } else + ret = err; + } + + return ret; +} + +static int sdio_uart_write_room(struct tty_struct *tty) +{ + struct sdio_uart_port *port = tty->driver_data; + return port ? circ_chars_free(&port->xmit) : 0; +} + +static int sdio_uart_chars_in_buffer(struct tty_struct *tty) +{ + struct sdio_uart_port *port = tty->driver_data; + return port ? circ_chars_pending(&port->xmit) : 0; +} + +static void sdio_uart_send_xchar(struct tty_struct *tty, char ch) +{ + struct sdio_uart_port *port = tty->driver_data; + + port->x_char = ch; + if (ch && !(port->ier & UART_IER_THRI)) { + if (sdio_uart_claim_func(port) != 0) + return; + sdio_uart_start_tx(port); + sdio_uart_irq(port->func); + sdio_uart_release_func(port); + } +} + +static void sdio_uart_throttle(struct tty_struct *tty) +{ + struct sdio_uart_port *port = tty->driver_data; + + if (!I_IXOFF(tty) && !(tty->termios->c_cflag & CRTSCTS)) + return; + + if (sdio_uart_claim_func(port) != 0) + return; + + if (I_IXOFF(tty)) { + port->x_char = STOP_CHAR(tty); + sdio_uart_start_tx(port); + } + + if (tty->termios->c_cflag & CRTSCTS) + sdio_uart_clear_mctrl(port, TIOCM_RTS); + + sdio_uart_irq(port->func); + sdio_uart_release_func(port); +} + +static void sdio_uart_unthrottle(struct tty_struct *tty) +{ + struct sdio_uart_port *port = tty->driver_data; + + if (!I_IXOFF(tty) && !(tty->termios->c_cflag & CRTSCTS)) + return; + + if (sdio_uart_claim_func(port) != 0) + return; + + if (I_IXOFF(tty)) { + if (port->x_char) { + port->x_char = 0; + } else { + port->x_char = START_CHAR(tty); + sdio_uart_start_tx(port); + } + } + + if (tty->termios->c_cflag & CRTSCTS) + sdio_uart_set_mctrl(port, TIOCM_RTS); + + sdio_uart_irq(port->func); + sdio_uart_release_func(port); +} + +static void sdio_uart_set_termios(struct tty_struct *tty, struct ktermios *old_termios) +{ + struct sdio_uart_port *port = tty->driver_data; + unsigned int cflag = tty->termios->c_cflag; + +#define RELEVANT_IFLAG(iflag) ((iflag) & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK)) + + if ((cflag ^ old_termios->c_cflag) == 0 && + RELEVANT_IFLAG(tty->termios->c_iflag ^ old_termios->c_iflag) == 0) + return; + + if (sdio_uart_claim_func(port) != 0) + return; + + sdio_uart_change_speed(port, tty->termios, old_termios); + + /* Handle transition to B0 status */ + if ((old_termios->c_cflag & CBAUD) && !(cflag & CBAUD)) + sdio_uart_clear_mctrl(port, TIOCM_RTS | TIOCM_DTR); + + /* Handle transition away from B0 status */ + if (!(old_termios->c_cflag & CBAUD) && (cflag & CBAUD)) { + unsigned int mask = TIOCM_DTR; + if (!(cflag & CRTSCTS) || !test_bit(TTY_THROTTLED, &tty->flags)) + mask |= TIOCM_RTS; + sdio_uart_set_mctrl(port, mask); + } + + /* Handle turning off CRTSCTS */ + if ((old_termios->c_cflag & CRTSCTS) && !(cflag & CRTSCTS)) { + tty->hw_stopped = 0; + sdio_uart_start_tx(port); + } + + /* Handle turning on CRTSCTS */ + if (!(old_termios->c_cflag & CRTSCTS) && (cflag & CRTSCTS)) { + if (!(sdio_uart_get_mctrl(port) & TIOCM_CTS)) { + tty->hw_stopped = 1; + sdio_uart_stop_tx(port); + } + } + + sdio_uart_release_func(port); +} + +static void sdio_uart_break_ctl(struct tty_struct *tty, int break_state) +{ + struct sdio_uart_port *port = tty->driver_data; + + if (sdio_uart_claim_func(port) != 0) + return; + + if (break_state == -1) + port->lcr |= UART_LCR_SBC; + else + port->lcr &= ~UART_LCR_SBC; + sdio_out(port, UART_LCR, port->lcr); + + sdio_uart_release_func(port); +} + +static int sdio_uart_tiocmget(struct tty_struct *tty, struct file *file) +{ + struct sdio_uart_port *port = tty->driver_data; + int result; + + result = sdio_uart_claim_func(port); + if (!result) { + result = port->mctrl | sdio_uart_get_mctrl(port); + sdio_uart_release_func(port); + } + + return result; +} + +static int sdio_uart_tiocmset(struct tty_struct *tty, struct file *file, + unsigned int set, unsigned int clear) +{ + struct sdio_uart_port *port = tty->driver_data; + int result; + + result =sdio_uart_claim_func(port); + if(!result) { + sdio_uart_update_mctrl(port, set, clear); + sdio_uart_release_func(port); + } + + return result; +} + +static int sdio_uart_read_proc(char *page, char **start, off_t off, + int count, int *eof, void *data) +{ + int i, len = 0; + off_t begin = 0; + + len += sprintf(page, "serinfo:1.0 driver%s%s revision:%s\n", + "", "", ""); + for (i = 0; i < UART_NR && len < PAGE_SIZE - 96; i++) { + struct sdio_uart_port *port = sdio_uart_port_get(i); + if (port) { + len += sprintf(page+len, "%d: uart:SDIO", i); + if(capable(CAP_SYS_ADMIN)) { + len += sprintf(page + len, " tx:%d rx:%d", + port->icount.tx, port->icount.rx); + if (port->icount.frame) + len += sprintf(page + len, " fe:%d", + port->icount.frame); + if (port->icount.parity) + len += sprintf(page + len, " pe:%d", + port->icount.parity); + if (port->icount.brk) + len += sprintf(page + len, " brk:%d", + port->icount.brk); + if (port->icount.overrun) + len += sprintf(page + len, " oe:%d", + port->icount.overrun); + if (port->icount.cts) + len += sprintf(page + len, " cts:%d", + port->icount.cts); + if (port->icount.dsr) + len += sprintf(page + len, " dsr:%d", + port->icount.dsr); + if (port->icount.rng) + len += sprintf(page + len, " rng:%d", + port->icount.rng); + if (port->icount.dcd) + len += sprintf(page + len, " dcd:%d", + port->icount.dcd); + } + strcat(page, "\n"); + len++; + sdio_uart_port_put(port); + } + + if (len + begin > off + count) + goto done; + if (len + begin < off) { + begin += len; + len = 0; + } + } + *eof = 1; + +done: + if (off >= len + begin) + return 0; + *start = page + (off - begin); + return (count < begin + len - off) ? count : (begin + len - off); +} + +static const struct tty_operations sdio_uart_ops = { + .open = sdio_uart_open, + .close = sdio_uart_close, + .write = sdio_uart_write, + .write_room = sdio_uart_write_room, + .chars_in_buffer = sdio_uart_chars_in_buffer, + .send_xchar = sdio_uart_send_xchar, + .throttle = sdio_uart_throttle, + .unthrottle = sdio_uart_unthrottle, + .set_termios = sdio_uart_set_termios, + .break_ctl = sdio_uart_break_ctl, + .tiocmget = sdio_uart_tiocmget, + .tiocmset = sdio_uart_tiocmset, + .read_proc = sdio_uart_read_proc, +}; + +static struct tty_driver *sdio_uart_tty_driver; + +static int sdio_uart_probe(struct sdio_func *func, + const struct sdio_device_id *id) +{ + struct sdio_uart_port *port; + int ret; + + port = kzalloc(sizeof(struct sdio_uart_port), GFP_KERNEL); + if (!port) + return -ENOMEM; + + if (func->class == SDIO_CLASS_UART) { + printk(KERN_WARNING "%s: need info on UART class basic setup\n", + sdio_func_id(func)); + kfree(port); + return -ENOSYS; + } else if (func->class == SDIO_CLASS_GPS) { + /* + * We need tuple 0x91. It contains SUBTPL_SIOREG + * and SUBTPL_RCVCAPS. + */ + struct sdio_func_tuple *tpl; + for (tpl = func->tuples; tpl; tpl = tpl->next) { + if (tpl->code != 0x91) + continue; + if (tpl->size < 10) + continue; + if (tpl->data[1] == 0) /* SUBTPL_SIOREG */ + break; + } + if (!tpl) { + printk(KERN_WARNING + "%s: can't find tuple 0x91 subtuple 0 (SUBTPL_SIOREG) for GPS class\n", + sdio_func_id(func)); + kfree(port); + return -EINVAL; + } + printk(KERN_DEBUG "%s: Register ID = 0x%02x, Exp ID = 0x%02x\n", + sdio_func_id(func), tpl->data[2], tpl->data[3]); + port->regs_offset = (tpl->data[4] << 0) | + (tpl->data[5] << 8) | + (tpl->data[6] << 16); + printk(KERN_DEBUG "%s: regs offset = 0x%x\n", + sdio_func_id(func), port->regs_offset); + port->uartclk = tpl->data[7] * 115200; + if (port->uartclk == 0) + port->uartclk = 115200; + printk(KERN_DEBUG "%s: clk %d baudcode %u 4800-div %u\n", + sdio_func_id(func), port->uartclk, + tpl->data[7], tpl->data[8] | (tpl->data[9] << 8)); + } else { + kfree(port); + return -EINVAL; + } + + port->func = func; + sdio_set_drvdata(func, port); + + ret = sdio_uart_add_port(port); + if (ret) { + kfree(port); + } else { + struct device *dev; + dev = tty_register_device(sdio_uart_tty_driver, port->index, &func->dev); + if (IS_ERR(dev)) { + sdio_uart_port_remove(port); + ret = PTR_ERR(dev); + } + } + + return ret; +} + +static void sdio_uart_remove(struct sdio_func *func) +{ + struct sdio_uart_port *port = sdio_get_drvdata(func); + + tty_unregister_device(sdio_uart_tty_driver, port->index); + sdio_uart_port_remove(port); +} + +static const struct sdio_device_id sdio_uart_ids[] = { + { SDIO_DEVICE_CLASS(SDIO_CLASS_UART) }, + { SDIO_DEVICE_CLASS(SDIO_CLASS_GPS) }, + { /* end: all zeroes */ }, +}; + +MODULE_DEVICE_TABLE(sdio, sdio_uart_ids); + +static struct sdio_driver sdio_uart_driver = { + .probe = sdio_uart_probe, + .remove = sdio_uart_remove, + .name = "sdio_uart", + .id_table = sdio_uart_ids, +}; + +static int __init sdio_uart_init(void) +{ + int ret; + struct tty_driver *tty_drv; + + sdio_uart_tty_driver = tty_drv = alloc_tty_driver(UART_NR); + if (!tty_drv) + return -ENOMEM; + + tty_drv->owner = THIS_MODULE; + tty_drv->driver_name = "sdio_uart"; + tty_drv->name = "ttySDIO"; + tty_drv->major = 0; /* dynamically allocated */ + tty_drv->minor_start = 0; + tty_drv->type = TTY_DRIVER_TYPE_SERIAL; + tty_drv->subtype = SERIAL_TYPE_NORMAL; + tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; + tty_drv->init_termios = tty_std_termios; + tty_drv->init_termios.c_cflag = B4800 | CS8 | CREAD | HUPCL | CLOCAL; + tty_drv->init_termios.c_ispeed = 4800; + tty_drv->init_termios.c_ospeed = 4800; + tty_set_operations(tty_drv, &sdio_uart_ops); + + ret = tty_register_driver(tty_drv); + if (ret) + goto err1; + + ret = sdio_register_driver(&sdio_uart_driver); + if (ret) + goto err2; + + return 0; + +err2: + tty_unregister_driver(tty_drv); +err1: + put_tty_driver(tty_drv); + return ret; +} + +static void __exit sdio_uart_exit(void) +{ + sdio_unregister_driver(&sdio_uart_driver); + tty_unregister_driver(sdio_uart_tty_driver); + put_tty_driver(sdio_uart_tty_driver); +} + +module_init(sdio_uart_init); +module_exit(sdio_uart_exit); + +MODULE_AUTHOR("Nicolas Pitre"); +MODULE_LICENSE("GPL"); diff --git a/drivers/mmc/core/Makefile b/drivers/mmc/core/Makefile index 3fdd08c..4985807 100644 --- a/drivers/mmc/core/Makefile +++ b/drivers/mmc/core/Makefile @@ -8,5 +8,7 @@ endif obj-$(CONFIG_MMC) += mmc_core.o mmc_core-y := core.o sysfs.o bus.o host.o \ - mmc.o mmc_ops.o sd.o sd_ops.o + mmc.o mmc_ops.o sd.o sd_ops.o \ + sdio.o sdio_ops.o sdio_bus.o \ + sdio_cis.o sdio_io.o sdio_irq.o diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c index 817a794..8d6f601 100644 --- a/drivers/mmc/core/bus.c +++ b/drivers/mmc/core/bus.c @@ -19,6 +19,7 @@ #include "sysfs.h" #include "core.h" +#include "sdio_cis.h" #include "bus.h" #define dev_to_mmc_card(d) container_of(d, struct mmc_card, dev) @@ -34,6 +35,8 @@ static ssize_t mmc_type_show(struct device *dev, return sprintf(buf, "MMC\n"); case MMC_TYPE_SD: return sprintf(buf, "SD\n"); + case MMC_TYPE_SDIO: + return sprintf(buf, "SDIO\n"); default: return -EFAULT; } @@ -59,28 +62,34 @@ mmc_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf, int buf_size) { struct mmc_card *card = dev_to_mmc_card(dev); - int retval = 0, i = 0, length = 0; - -#define add_env(fmt,val) do { \ - retval = add_uevent_var(envp, num_envp, &i, \ - buf, buf_size, &length, \ - fmt, val); \ - if (retval) \ - return retval; \ -} while (0); + const char *type; + int i = 0, length = 0; switch (card->type) { case MMC_TYPE_MMC: - add_env("MMC_TYPE=%s", "MMC"); + type = "MMC"; break; case MMC_TYPE_SD: - add_env("MMC_TYPE=%s", "SD"); + type = "SD"; + break; + case MMC_TYPE_SDIO: + type = "SDIO"; break; + default: + type = NULL; } - add_env("MMC_NAME=%s", mmc_card_name(card)); + if (type) { + if (add_uevent_var(envp, num_envp, &i, + buf, buf_size, &length, + "MMC_TYPE=%s", type)) + return -ENOMEM; + } -#undef add_env + if (add_uevent_var(envp, num_envp, &i, + buf, buf_size, &length, + "MMC_NAME=%s", mmc_card_name(card))) + return -ENOMEM; envp[i] = NULL; @@ -176,6 +185,11 @@ static void mmc_release_card(struct device *dev) { struct mmc_card *card = dev_to_mmc_card(dev); + sdio_free_common_cis(card); + + if (card->info) + kfree(card->info); + kfree(card); } @@ -221,15 +235,25 @@ int mmc_add_card(struct mmc_card *card) if (mmc_card_blockaddr(card)) type = "SDHC"; break; + case MMC_TYPE_SDIO: + type = "SDIO"; + break; default: type = "?"; break; } - printk(KERN_INFO "%s: new %s%s card at address %04x\n", - mmc_hostname(card->host), - mmc_card_highspeed(card) ? "high speed " : "", - type, card->rca); + if (mmc_host_is_spi(card->host)) { + printk(KERN_INFO "%s: new %s%s card on SPI\n", + mmc_hostname(card->host), + mmc_card_highspeed(card) ? "high speed " : "", + type); + } else { + printk(KERN_INFO "%s: new %s%s card at address %04x\n", + mmc_hostname(card->host), + mmc_card_highspeed(card) ? "high speed " : "", + type, card->rca); + } card->dev.uevent_suppress = 1; @@ -261,8 +285,13 @@ int mmc_add_card(struct mmc_card *card) void mmc_remove_card(struct mmc_card *card) { if (mmc_card_present(card)) { - printk(KERN_INFO "%s: card %04x removed\n", - mmc_hostname(card->host), card->rca); + if (mmc_host_is_spi(card->host)) { + printk(KERN_INFO "%s: SPI card removed\n", + mmc_hostname(card->host)); + } else { + printk(KERN_INFO "%s: card %04x removed\n", + mmc_hostname(card->host), card->rca); + } if (card->host->bus_ops->sysfs_remove) card->host->bus_ops->sysfs_remove(card->host, card); diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index bfd2ae5..09435e0 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -18,6 +18,7 @@ #include <linux/delay.h> #include <linux/pagemap.h> #include <linux/err.h> +#include <linux/leds.h> #include <asm/scatterlist.h> #include <linux/scatterlist.h> @@ -29,16 +30,27 @@ #include "core.h" #include "bus.h" #include "host.h" +#include "sdio_bus.h" #include "mmc_ops.h" #include "sd_ops.h" +#include "sdio_ops.h" extern int mmc_attach_mmc(struct mmc_host *host, u32 ocr); extern int mmc_attach_sd(struct mmc_host *host, u32 ocr); +extern int mmc_attach_sdio(struct mmc_host *host, u32 ocr); static struct workqueue_struct *workqueue; /* + * Enabling software CRCs on the data blocks can be a significant (30%) + * performance cost, and for other reasons may not always be desired. + * So we allow it it to be disabled. + */ +int use_spi_crc = 1; +module_param(use_spi_crc, bool, 0); + +/* * Internal function. Schedule delayed work in the MMC work queue. */ static int mmc_schedule_delayed_work(struct delayed_work *work, @@ -68,6 +80,11 @@ void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) struct mmc_command *cmd = mrq->cmd; int err = cmd->error; + if (err && cmd->retries && mmc_host_is_spi(host)) { + if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND) + cmd->retries = 0; + } + if (err && cmd->retries) { pr_debug("%s: req failed (CMD%u): %d, retrying...\n", mmc_hostname(host), cmd->opcode, err); @@ -76,6 +93,8 @@ void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) cmd->error = 0; host->ops->request(host, mrq); } else { + led_trigger_event(host->led, LED_OFF); + pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n", mmc_hostname(host), cmd->opcode, err, cmd->resp[0], cmd->resp[1], @@ -118,7 +137,7 @@ mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) "tsac %d ms nsac %d\n", mmc_hostname(host), mrq->data->blksz, mrq->data->blocks, mrq->data->flags, - mrq->data->timeout_ns / 10000000, + mrq->data->timeout_ns / 1000000, mrq->data->timeout_clks); } @@ -130,6 +149,8 @@ mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) WARN_ON(!host->claimed); + led_trigger_event(host->led, LED_FULL); + mrq->cmd->error = 0; mrq->cmd->mrq = mrq; if (mrq->data) { @@ -199,7 +220,7 @@ int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries { struct mmc_request mrq; - BUG_ON(!host->claimed); + WARN_ON(!host->claimed); memset(&mrq, 0, sizeof(struct mmc_request)); @@ -220,17 +241,24 @@ EXPORT_SYMBOL(mmc_wait_for_cmd); * mmc_set_data_timeout - set the timeout for a data command * @data: data phase for command * @card: the MMC card associated with the data transfer - * @write: flag to differentiate reads from writes * * Computes the data timeout parameters according to the * correct algorithm given the card type. */ -void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card, - int write) +void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) { unsigned int mult; /* + * SDIO cards only define an upper 1 s limit on access. + */ + if (mmc_card_sdio(card)) { + data->timeout_ns = 1000000000; + data->timeout_clks = 0; + return; + } + + /* * SD cards use a 100 multiplier rather than 10 */ mult = mmc_card_sd(card) ? 100 : 10; @@ -239,7 +267,7 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card, * Scale up the multiplier (and therefore the timeout) by * the r2w factor for writes. */ - if (write) + if (data->flags & MMC_DATA_WRITE) mult <<= card->csd.r2w_factor; data->timeout_ns = card->csd.tacc_ns * mult; @@ -255,7 +283,7 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card, timeout_us += data->timeout_clks * 1000 / (card->host->ios.clock / 1000); - if (write) + if (data->flags & MMC_DATA_WRITE) limit_us = 250000; else limit_us = 100000; @@ -272,15 +300,20 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card, EXPORT_SYMBOL(mmc_set_data_timeout); /** - * mmc_claim_host - exclusively claim a host + * __mmc_claim_host - exclusively claim a host * @host: mmc host to claim + * @abort: whether or not the operation should be aborted * - * Claim a host for a set of operations. + * Claim a host for a set of operations. If @abort is non null and + * dereference a non-zero value then this will return prematurely with + * that non-zero value without acquiring the lock. Returns zero + * with the lock held otherwise. */ -void mmc_claim_host(struct mmc_host *host) +int __mmc_claim_host(struct mmc_host *host, atomic_t *abort) { DECLARE_WAITQUEUE(wait, current); unsigned long flags; + int stop; might_sleep(); @@ -288,19 +321,24 @@ void mmc_claim_host(struct mmc_host *host) spin_lock_irqsave(&host->lock, flags); while (1) { set_current_state(TASK_UNINTERRUPTIBLE); - if (!host->claimed) + stop = abort ? atomic_read(abort) : 0; + if (stop || !host->claimed) break; spin_unlock_irqrestore(&host->lock, flags); schedule(); spin_lock_irqsave(&host->lock, flags); } set_current_state(TASK_RUNNING); - host->claimed = 1; + if (!stop) + host->claimed = 1; + else + wake_up(&host->wq); spin_unlock_irqrestore(&host->lock, flags); remove_wait_queue(&host->wq, &wait); + return stop; } -EXPORT_SYMBOL(mmc_claim_host); +EXPORT_SYMBOL(__mmc_claim_host); /** * mmc_release_host - release a host @@ -313,7 +351,7 @@ void mmc_release_host(struct mmc_host *host) { unsigned long flags; - BUG_ON(!host->claimed); + WARN_ON(!host->claimed); spin_lock_irqsave(&host->lock, flags); host->claimed = 0; @@ -433,19 +471,32 @@ static void mmc_power_up(struct mmc_host *host) int bit = fls(host->ocr_avail) - 1; host->ios.vdd = bit; - host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; - host->ios.chip_select = MMC_CS_DONTCARE; + if (mmc_host_is_spi(host)) { + host->ios.chip_select = MMC_CS_HIGH; + host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; + } else { + host->ios.chip_select = MMC_CS_DONTCARE; + host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; + } host->ios.power_mode = MMC_POWER_UP; host->ios.bus_width = MMC_BUS_WIDTH_1; host->ios.timing = MMC_TIMING_LEGACY; mmc_set_ios(host); - mmc_delay(1); + /* + * This delay should be sufficient to allow the power supply + * to reach the minimum voltage. + */ + mmc_delay(2); host->ios.clock = host->f_min; host->ios.power_mode = MMC_POWER_ON; mmc_set_ios(host); + /* + * This delay must be at least 74 clock sizes, or 1 ms, or the + * time required to reach a stable voltage. + */ mmc_delay(2); } @@ -453,8 +504,10 @@ static void mmc_power_off(struct mmc_host *host) { host->ios.clock = 0; host->ios.vdd = 0; - host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; - host->ios.chip_select = MMC_CS_DONTCARE; + if (!mmc_host_is_spi(host)) { + host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; + host->ios.chip_select = MMC_CS_DONTCARE; + } host->ios.power_mode = MMC_POWER_OFF; host->ios.bus_width = MMC_BUS_WIDTH_1; host->ios.timing = MMC_TIMING_LEGACY; @@ -511,7 +564,7 @@ void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops) BUG_ON(!host); BUG_ON(!ops); - BUG_ON(!host->claimed); + WARN_ON(!host->claimed); spin_lock_irqsave(&host->lock, flags); @@ -535,8 +588,8 @@ void mmc_detach_bus(struct mmc_host *host) BUG_ON(!host); - BUG_ON(!host->claimed); - BUG_ON(!host->bus_ops); + WARN_ON(!host->claimed); + WARN_ON(!host->bus_ops); spin_lock_irqsave(&host->lock, flags); @@ -564,7 +617,7 @@ void mmc_detect_change(struct mmc_host *host, unsigned long delay) #ifdef CONFIG_MMC_DEBUG unsigned long flags; spin_lock_irqsave(&host->lock, flags); - BUG_ON(host->removed); + WARN_ON(host->removed); spin_unlock_irqrestore(&host->lock, flags); #endif @@ -597,24 +650,38 @@ void mmc_rescan(struct work_struct *work) mmc_send_if_cond(host, host->ocr_avail); + /* + * First we search for SDIO... + */ + err = mmc_send_io_op_cond(host, 0, &ocr); + if (!err) { + if (mmc_attach_sdio(host, ocr)) + mmc_power_off(host); + return; + } + + /* + * ...then normal SD... + */ err = mmc_send_app_op_cond(host, 0, &ocr); - if (err == MMC_ERR_NONE) { + if (!err) { if (mmc_attach_sd(host, ocr)) mmc_power_off(host); - } else { - /* - * If we fail to detect any SD cards then try - * searching for MMC cards. - */ - err = mmc_send_op_cond(host, 0, &ocr); - if (err == MMC_ERR_NONE) { - if (mmc_attach_mmc(host, ocr)) - mmc_power_off(host); - } else { + return; + } + + /* + * ...and finally MMC. + */ + err = mmc_send_op_cond(host, 0, &ocr); + if (!err) { + if (mmc_attach_mmc(host, ocr)) mmc_power_off(host); - mmc_release_host(host); - } + return; } + + mmc_release_host(host); + mmc_power_off(host); } else { if (host->bus_ops->detect && !host->bus_dead) host->bus_ops->detect(host); @@ -725,22 +792,38 @@ static int __init mmc_init(void) return -ENOMEM; ret = mmc_register_bus(); - if (ret == 0) { - ret = mmc_register_host_class(); - if (ret) - mmc_unregister_bus(); - } + if (ret) + goto destroy_workqueue; + + ret = mmc_register_host_class(); + if (ret) + goto unregister_bus; + + ret = sdio_register_bus(); + if (ret) + goto unregister_host_class; + + return 0; + +unregister_host_class: + mmc_unregister_host_class(); +unregister_bus: + mmc_unregister_bus(); +destroy_workqueue: + destroy_workqueue(workqueue); + return ret; } static void __exit mmc_exit(void) { + sdio_unregister_bus(); mmc_unregister_host_class(); mmc_unregister_bus(); destroy_workqueue(workqueue); } -module_init(mmc_init); +subsys_initcall(mmc_init); module_exit(mmc_exit); MODULE_LICENSE("GPL"); diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h index bb2774a..39daf2f 100644 --- a/drivers/mmc/core/core.h +++ b/drivers/mmc/core/core.h @@ -48,5 +48,7 @@ void mmc_rescan(struct work_struct *work); void mmc_start_host(struct mmc_host *host); void mmc_stop_host(struct mmc_host *host); +extern int use_spi_crc; + #endif diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index 2c7ce8f..64fbc97 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -15,6 +15,7 @@ #include <linux/err.h> #include <linux/idr.h> #include <linux/pagemap.h> +#include <linux/leds.h> #include <linux/mmc/host.h> @@ -100,6 +101,9 @@ int mmc_add_host(struct mmc_host *host) { int err; + WARN_ON((host->caps & MMC_CAP_SDIO_IRQ) && + !host->ops->enable_sdio_irq); + if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL)) return -ENOMEM; @@ -112,6 +116,8 @@ int mmc_add_host(struct mmc_host *host) snprintf(host->class_dev.bus_id, BUS_ID_SIZE, "mmc%d", host->index); + led_trigger_register_simple(host->class_dev.bus_id, &host->led); + err = device_add(&host->class_dev); if (err) return err; @@ -137,6 +143,8 @@ void mmc_remove_host(struct mmc_host *host) device_del(&host->class_dev); + led_trigger_unregister(host->led); + spin_lock(&mmc_host_lock); idr_remove(&mmc_host_idr, host->index); spin_unlock(&mmc_host_lock); diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 21d7f48..65fe288 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -161,13 +161,12 @@ static int mmc_read_ext_csd(struct mmc_card *card) { int err; u8 *ext_csd; + unsigned int ext_csd_struct; BUG_ON(!card); - err = MMC_ERR_FAILED; - if (card->csd.mmca_vsn < CSD_SPEC_VER_4) - return MMC_ERR_NONE; + return 0; /* * As the ext_csd is so large and mostly unused, we don't store the @@ -176,13 +175,19 @@ static int mmc_read_ext_csd(struct mmc_card *card) ext_csd = kmalloc(512, GFP_KERNEL); if (!ext_csd) { printk(KERN_ERR "%s: could not allocate a buffer to " - "receive the ext_csd. mmc v4 cards will be " - "treated as v3.\n", mmc_hostname(card->host)); - return MMC_ERR_FAILED; + "receive the ext_csd.\n", mmc_hostname(card->host)); + return -ENOMEM; } err = mmc_send_ext_csd(card, ext_csd); - if (err != MMC_ERR_NONE) { + if (err) { + /* + * We all hosts that cannot perform the command + * to fail more gracefully + */ + if (err != -EINVAL) + goto out; + /* * High capacity cards should have this "magic" size * stored in their CSD. @@ -197,18 +202,29 @@ static int mmc_read_ext_csd(struct mmc_card *card) "EXT_CSD, performance might " "suffer.\n", mmc_hostname(card->host)); - err = MMC_ERR_NONE; + err = 0; } + goto out; } - card->ext_csd.sectors = - ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | - ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | - ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | - ext_csd[EXT_CSD_SEC_CNT + 3] << 24; - if (card->ext_csd.sectors) - mmc_card_set_blockaddr(card); + ext_csd_struct = ext_csd[EXT_CSD_REV]; + if (ext_csd_struct > 2) { + printk(KERN_ERR "%s: unrecognised EXT_CSD structure " + "version %d\n", mmc_hostname(card->host), + ext_csd_struct); + return -EINVAL; + } + + if (ext_csd_struct >= 2) { + card->ext_csd.sectors = + ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | + ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | + ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | + ext_csd[EXT_CSD_SEC_CNT + 3] << 24; + if (card->ext_csd.sectors) + mmc_card_set_blockaddr(card); + } switch (ext_csd[EXT_CSD_CARD_TYPE]) { case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: @@ -246,7 +262,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, unsigned int max_dtr; BUG_ON(!host); - BUG_ON(!host->claimed); + WARN_ON(!host->claimed); /* * Since we're changing the OCR value, we seem to @@ -258,19 +274,33 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, /* The extra bit indicates that we support high capacity */ err = mmc_send_op_cond(host, ocr | (1 << 30), NULL); - if (err != MMC_ERR_NONE) + if (err) goto err; /* + * For SPI, enable CRC as appropriate. + */ + if (mmc_host_is_spi(host)) { + err = mmc_spi_set_crc(host, use_spi_crc); + if (err) + goto err; + } + + /* * Fetch CID from card. */ - err = mmc_all_send_cid(host, cid); - if (err != MMC_ERR_NONE) + if (mmc_host_is_spi(host)) + err = mmc_send_cid(host, cid); + else + err = mmc_all_send_cid(host, cid); + if (err) goto err; if (oldcard) { - if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) + if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { + err = -ENOENT; goto err; + } card = oldcard; } else { @@ -278,8 +308,10 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, * Allocate card structure. */ card = mmc_alloc_card(host); - if (IS_ERR(card)) + if (IS_ERR(card)) { + err = PTR_ERR(card); goto err; + } card->type = MMC_TYPE_MMC; card->rca = 1; @@ -287,43 +319,47 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, } /* - * Set card RCA. + * For native busses: set card RCA and quit open drain mode. */ - err = mmc_set_relative_addr(card); - if (err != MMC_ERR_NONE) - goto free_card; + if (!mmc_host_is_spi(host)) { + err = mmc_set_relative_addr(card); + if (err) + goto free_card; - mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); + mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); + } if (!oldcard) { /* * Fetch CSD from card. */ err = mmc_send_csd(card, card->raw_csd); - if (err != MMC_ERR_NONE) + if (err) goto free_card; err = mmc_decode_csd(card); - if (err < 0) + if (err) goto free_card; err = mmc_decode_cid(card); - if (err < 0) + if (err) goto free_card; } /* * Select card, as all following commands rely on that. */ - err = mmc_select_card(card); - if (err != MMC_ERR_NONE) - goto free_card; + if (!mmc_host_is_spi(host)) { + err = mmc_select_card(card); + if (err) + goto free_card; + } if (!oldcard) { /* - * Fetch and process extened CSD. + * Fetch and process extended CSD. */ err = mmc_read_ext_csd(card); - if (err != MMC_ERR_NONE) + if (err) goto free_card; } @@ -334,7 +370,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, (host->caps & MMC_CAP_MMC_HIGHSPEED)) { err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1); - if (err != MMC_ERR_NONE) + if (err) goto free_card; mmc_card_set_highspeed(card); @@ -363,7 +399,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, (host->caps & MMC_CAP_4_BIT_DATA)) { err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_4); - if (err != MMC_ERR_NONE) + if (err) goto free_card; mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); @@ -372,14 +408,14 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, if (!oldcard) host->card = card; - return MMC_ERR_NONE; + return 0; free_card: if (!oldcard) mmc_remove_card(card); err: - return MMC_ERR_FAILED; + return err; } /* @@ -413,7 +449,7 @@ static void mmc_detect(struct mmc_host *host) mmc_release_host(host); - if (err != MMC_ERR_NONE) { + if (err) { mmc_remove(host); mmc_claim_host(host); @@ -480,7 +516,8 @@ static void mmc_suspend(struct mmc_host *host) BUG_ON(!host->card); mmc_claim_host(host); - mmc_deselect_cards(host); + if (!mmc_host_is_spi(host)) + mmc_deselect_cards(host); host->card->state &= ~MMC_STATE_HIGHSPEED; mmc_release_host(host); } @@ -502,7 +539,7 @@ static void mmc_resume(struct mmc_host *host) err = mmc_init_card(host, host->ocr, host->card); mmc_release_host(host); - if (err != MMC_ERR_NONE) { + if (err) { mmc_remove(host); mmc_claim_host(host); @@ -536,11 +573,20 @@ int mmc_attach_mmc(struct mmc_host *host, u32 ocr) int err; BUG_ON(!host); - BUG_ON(!host->claimed); + WARN_ON(!host->claimed); mmc_attach_bus(host, &mmc_ops); /* + * We need to get OCR a different way for SPI. + */ + if (mmc_host_is_spi(host)) { + err = mmc_spi_read_ocr(host, 1, &ocr); + if (err) + goto err; + } + + /* * Sanity check the voltages that the card claims to * support. */ @@ -565,7 +611,7 @@ int mmc_attach_mmc(struct mmc_host *host, u32 ocr) * Detect and init the card. */ err = mmc_init_card(host, host->ocr, NULL); - if (err != MMC_ERR_NONE) + if (err) goto err; mmc_release_host(host); @@ -587,6 +633,6 @@ err: printk(KERN_ERR "%s: error %d whilst initialising MMC card\n", mmc_hostname(host), err); - return 0; + return err; } diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c index 913e75f..bf4bc6a 100644 --- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c @@ -40,10 +40,10 @@ static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card) } err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); - if (err != MMC_ERR_NONE) + if (err) return err; - return MMC_ERR_NONE; + return 0; } int mmc_select_card(struct mmc_card *card) @@ -63,23 +63,36 @@ int mmc_go_idle(struct mmc_host *host) int err; struct mmc_command cmd; - mmc_set_chip_select(host, MMC_CS_HIGH); - - mmc_delay(1); + /* + * Non-SPI hosts need to prevent chipselect going active during + * GO_IDLE; that would put chips into SPI mode. Remind them of + * that in case of hardware that won't pull up DAT3/nCS otherwise. + * + * SPI hosts ignore ios.chip_select; it's managed according to + * rules that must accomodate non-MMC slaves which this layer + * won't even know about. + */ + if (!mmc_host_is_spi(host)) { + mmc_set_chip_select(host, MMC_CS_HIGH); + mmc_delay(1); + } memset(&cmd, 0, sizeof(struct mmc_command)); cmd.opcode = MMC_GO_IDLE_STATE; cmd.arg = 0; - cmd.flags = MMC_RSP_NONE | MMC_CMD_BC; + cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC; err = mmc_wait_for_cmd(host, &cmd, 0); mmc_delay(1); - mmc_set_chip_select(host, MMC_CS_DONTCARE); + if (!mmc_host_is_spi(host)) { + mmc_set_chip_select(host, MMC_CS_DONTCARE); + mmc_delay(1); + } - mmc_delay(1); + host->use_spi_crc = 0; return err; } @@ -94,23 +107,33 @@ int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) memset(&cmd, 0, sizeof(struct mmc_command)); cmd.opcode = MMC_SEND_OP_COND; - cmd.arg = ocr; - cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; + cmd.arg = mmc_host_is_spi(host) ? 0 : ocr; + cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR; for (i = 100; i; i--) { err = mmc_wait_for_cmd(host, &cmd, 0); - if (err != MMC_ERR_NONE) + if (err) break; - if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0) + /* if we're just probing, do a single pass */ + if (ocr == 0) break; - err = MMC_ERR_TIMEOUT; + /* otherwise wait until reset completes */ + if (mmc_host_is_spi(host)) { + if (!(cmd.resp[0] & R1_SPI_IDLE)) + break; + } else { + if (cmd.resp[0] & MMC_CARD_BUSY) + break; + } + + err = -ETIMEDOUT; mmc_delay(10); } - if (rocr) + if (rocr && !mmc_host_is_spi(host)) *rocr = cmd.resp[0]; return err; @@ -131,12 +154,12 @@ int mmc_all_send_cid(struct mmc_host *host, u32 *cid) cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); - if (err != MMC_ERR_NONE) + if (err) return err; memcpy(cid, cmd.resp, sizeof(u32) * 4); - return MMC_ERR_NONE; + return 0; } int mmc_set_relative_addr(struct mmc_card *card) @@ -154,46 +177,52 @@ int mmc_set_relative_addr(struct mmc_card *card) cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); - if (err != MMC_ERR_NONE) + if (err) return err; - return MMC_ERR_NONE; + return 0; } -int mmc_send_csd(struct mmc_card *card, u32 *csd) +static int +mmc_send_cxd_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode) { int err; struct mmc_command cmd; - BUG_ON(!card); - BUG_ON(!card->host); - BUG_ON(!csd); + BUG_ON(!host); + BUG_ON(!cxd); memset(&cmd, 0, sizeof(struct mmc_command)); - cmd.opcode = MMC_SEND_CSD; - cmd.arg = card->rca << 16; + cmd.opcode = opcode; + cmd.arg = arg; cmd.flags = MMC_RSP_R2 | MMC_CMD_AC; - err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); - if (err != MMC_ERR_NONE) + err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); + if (err) return err; - memcpy(csd, cmd.resp, sizeof(u32) * 4); + memcpy(cxd, cmd.resp, sizeof(u32) * 4); - return MMC_ERR_NONE; + return 0; } -int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd) +static int +mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host, + u32 opcode, void *buf, unsigned len) { struct mmc_request mrq; struct mmc_command cmd; struct mmc_data data; struct scatterlist sg; + void *data_buf; - BUG_ON(!card); - BUG_ON(!card->host); - BUG_ON(!ext_csd); + /* dma onto stack is unsafe/nonportable, but callers to this + * routine normally provide temporary on-stack buffers ... + */ + data_buf = kmalloc(len, GFP_KERNEL); + if (data_buf == NULL) + return -ENOMEM; memset(&mrq, 0, sizeof(struct mmc_request)); memset(&cmd, 0, sizeof(struct mmc_command)); @@ -202,28 +231,99 @@ int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd) mrq.cmd = &cmd; mrq.data = &data; - cmd.opcode = MMC_SEND_EXT_CSD; + cmd.opcode = opcode; cmd.arg = 0; - cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; - data.blksz = 512; + /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we + * rely on callers to never use this with "native" calls for reading + * CSD or CID. Native versions of those commands use the R2 type, + * not R1 plus a data block. + */ + cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; + + data.blksz = len; data.blocks = 1; data.flags = MMC_DATA_READ; data.sg = &sg; data.sg_len = 1; - sg_init_one(&sg, ext_csd, 512); + sg_init_one(&sg, data_buf, len); - mmc_set_data_timeout(&data, card, 0); + if (card) + mmc_set_data_timeout(&data, card); - mmc_wait_for_req(card->host, &mrq); + mmc_wait_for_req(host, &mrq); - if (cmd.error != MMC_ERR_NONE) + memcpy(buf, data_buf, len); + kfree(data_buf); + + if (cmd.error) return cmd.error; - if (data.error != MMC_ERR_NONE) + if (data.error) return data.error; - return MMC_ERR_NONE; + return 0; +} + +int mmc_send_csd(struct mmc_card *card, u32 *csd) +{ + if (!mmc_host_is_spi(card->host)) + return mmc_send_cxd_native(card->host, card->rca << 16, + csd, MMC_SEND_CSD); + + return mmc_send_cxd_data(card, card->host, MMC_SEND_CSD, csd, 16); +} + +int mmc_send_cid(struct mmc_host *host, u32 *cid) +{ + if (!mmc_host_is_spi(host)) { + if (!host->card) + return -EINVAL; + return mmc_send_cxd_native(host, host->card->rca << 16, + cid, MMC_SEND_CID); + } + + return mmc_send_cxd_data(NULL, host, MMC_SEND_CID, cid, 16); +} + +int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd) +{ + return mmc_send_cxd_data(card, card->host, MMC_SEND_EXT_CSD, + ext_csd, 512); +} + +int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp) +{ + struct mmc_command cmd; + int err; + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = MMC_SPI_READ_OCR; + cmd.arg = highcap ? (1 << 30) : 0; + cmd.flags = MMC_RSP_SPI_R3; + + err = mmc_wait_for_cmd(host, &cmd, 0); + + *ocrp = cmd.resp[1]; + return err; +} + +int mmc_spi_set_crc(struct mmc_host *host, int use_crc) +{ + struct mmc_command cmd; + int err; + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = MMC_SPI_CRC_ON_OFF; + cmd.flags = MMC_RSP_SPI_R1; + cmd.arg = use_crc; + + err = mmc_wait_for_cmd(host, &cmd, 0); + if (!err) + host->use_spi_crc = use_crc; + return err; } int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value) @@ -241,13 +341,13 @@ int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value) (index << 16) | (value << 8) | set; - cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; + cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); - if (err != MMC_ERR_NONE) + if (err) return err; - return MMC_ERR_NONE; + return 0; } int mmc_send_status(struct mmc_card *card, u32 *status) @@ -261,16 +361,20 @@ int mmc_send_status(struct mmc_card *card, u32 *status) memset(&cmd, 0, sizeof(struct mmc_command)); cmd.opcode = MMC_SEND_STATUS; - cmd.arg = card->rca << 16; - cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; + if (!mmc_host_is_spi(card->host)) + cmd.arg = card->rca << 16; + cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC; err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); - if (err != MMC_ERR_NONE) + if (err) return err; + /* NOTE: callers are required to understand the difference + * between "native" and SPI format status words! + */ if (status) *status = cmd.resp[0]; - return MMC_ERR_NONE; + return 0; } diff --git a/drivers/mmc/core/mmc_ops.h b/drivers/mmc/core/mmc_ops.h index 76d09a9..17854bf 100644 --- a/drivers/mmc/core/mmc_ops.h +++ b/drivers/mmc/core/mmc_ops.h @@ -22,6 +22,9 @@ int mmc_send_csd(struct mmc_card *card, u32 *csd); int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd); int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value); int mmc_send_status(struct mmc_card *card, u32 *status); +int mmc_send_cid(struct mmc_host *host, u32 *cid); +int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp); +int mmc_spi_set_crc(struct mmc_host *host, int use_crc); #endif diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c index 1edc62b..d1c1e0f5 100644 --- a/drivers/mmc/core/sd.c +++ b/drivers/mmc/core/sd.c @@ -166,8 +166,6 @@ static int mmc_decode_scr(struct mmc_card *card) unsigned int scr_struct; u32 resp[4]; - BUG_ON(!mmc_card_sd(card)); - resp[3] = card->raw_scr[1]; resp[2] = card->raw_scr[0]; @@ -193,30 +191,38 @@ static int mmc_read_switch(struct mmc_card *card) u8 *status; if (card->scr.sda_vsn < SCR_SPEC_VER_1) - return MMC_ERR_NONE; + return 0; if (!(card->csd.cmdclass & CCC_SWITCH)) { printk(KERN_WARNING "%s: card lacks mandatory switch " "function, performance might suffer.\n", mmc_hostname(card->host)); - return MMC_ERR_NONE; + return 0; } - err = MMC_ERR_FAILED; + err = -EIO; status = kmalloc(64, GFP_KERNEL); if (!status) { printk(KERN_ERR "%s: could not allocate a buffer for " "switch capabilities.\n", mmc_hostname(card->host)); - return err; + return -ENOMEM; } err = mmc_sd_switch(card, 0, 0, 1, status); - if (err != MMC_ERR_NONE) { + if (err) { + /* + * We all hosts that cannot perform the command + * to fail more gracefully + */ + if (err != -EINVAL) + goto out; + printk(KERN_WARNING "%s: problem reading switch " "capabilities, performance might suffer.\n", mmc_hostname(card->host)); - err = MMC_ERR_NONE; + err = 0; + goto out; } @@ -238,28 +244,28 @@ static int mmc_switch_hs(struct mmc_card *card) u8 *status; if (card->scr.sda_vsn < SCR_SPEC_VER_1) - return MMC_ERR_NONE; + return 0; if (!(card->csd.cmdclass & CCC_SWITCH)) - return MMC_ERR_NONE; + return 0; if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) - return MMC_ERR_NONE; + return 0; if (card->sw_caps.hs_max_dtr == 0) - return MMC_ERR_NONE; + return 0; - err = MMC_ERR_FAILED; + err = -EIO; status = kmalloc(64, GFP_KERNEL); if (!status) { printk(KERN_ERR "%s: could not allocate a buffer for " "switch capabilities.\n", mmc_hostname(card->host)); - return err; + return -ENOMEM; } err = mmc_sd_switch(card, 1, 0, 1, status); - if (err != MMC_ERR_NONE) + if (err) goto out; if ((status[16] & 0xF) != 1) { @@ -292,7 +298,7 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, unsigned int max_dtr; BUG_ON(!host); - BUG_ON(!host->claimed); + WARN_ON(!host->claimed); /* * Since we're changing the OCR value, we seem to @@ -309,23 +315,37 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, * block-addressed SDHC cards. */ err = mmc_send_if_cond(host, ocr); - if (err == MMC_ERR_NONE) + if (!err) ocr |= 1 << 30; err = mmc_send_app_op_cond(host, ocr, NULL); - if (err != MMC_ERR_NONE) + if (err) goto err; /* + * For SPI, enable CRC as appropriate. + */ + if (mmc_host_is_spi(host)) { + err = mmc_spi_set_crc(host, use_spi_crc); + if (err) + goto err; + } + + /* * Fetch CID from card. */ - err = mmc_all_send_cid(host, cid); - if (err != MMC_ERR_NONE) + if (mmc_host_is_spi(host)) + err = mmc_send_cid(host, cid); + else + err = mmc_all_send_cid(host, cid); + if (err) goto err; if (oldcard) { - if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) + if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { + err = -ENOENT; goto err; + } card = oldcard; } else { @@ -333,32 +353,36 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, * Allocate card structure. */ card = mmc_alloc_card(host); - if (IS_ERR(card)) + if (IS_ERR(card)) { + err = PTR_ERR(card); goto err; + } card->type = MMC_TYPE_SD; memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); } /* - * Set card RCA. + * For native busses: get card RCA and quit open drain mode. */ - err = mmc_send_relative_addr(host, &card->rca); - if (err != MMC_ERR_NONE) - goto free_card; + if (!mmc_host_is_spi(host)) { + err = mmc_send_relative_addr(host, &card->rca); + if (err) + goto free_card; - mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); + mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); + } if (!oldcard) { /* * Fetch CSD from card. */ err = mmc_send_csd(card, card->raw_csd); - if (err != MMC_ERR_NONE) + if (err) goto free_card; err = mmc_decode_csd(card); - if (err < 0) + if (err) goto free_card; mmc_decode_cid(card); @@ -367,16 +391,18 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, /* * Select card, as all following commands rely on that. */ - err = mmc_select_card(card); - if (err != MMC_ERR_NONE) - goto free_card; + if (!mmc_host_is_spi(host)) { + err = mmc_select_card(card); + if (err) + goto free_card; + } if (!oldcard) { /* * Fetch SCR from card. */ err = mmc_app_send_scr(card, card->raw_scr); - if (err != MMC_ERR_NONE) + if (err) goto free_card; err = mmc_decode_scr(card); @@ -387,7 +413,7 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, * Fetch switch information from card. */ err = mmc_read_switch(card); - if (err != MMC_ERR_NONE) + if (err) goto free_card; } @@ -395,7 +421,7 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, * Attempt to change to high-speed (if supported) */ err = mmc_switch_hs(card); - if (err != MMC_ERR_NONE) + if (err) goto free_card; /* @@ -418,7 +444,7 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, if ((host->caps & MMC_CAP_4_BIT_DATA) && (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); - if (err != MMC_ERR_NONE) + if (err) goto free_card; mmc_set_bus_width(host, MMC_BUS_WIDTH_4); @@ -442,14 +468,14 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, if (!oldcard) host->card = card; - return MMC_ERR_NONE; + return 0; free_card: if (!oldcard) mmc_remove_card(card); err: - return MMC_ERR_FAILED; + return err; } /* @@ -483,7 +509,7 @@ static void mmc_sd_detect(struct mmc_host *host) mmc_release_host(host); - if (err != MMC_ERR_NONE) { + if (err) { mmc_sd_remove(host); mmc_claim_host(host); @@ -552,7 +578,8 @@ static void mmc_sd_suspend(struct mmc_host *host) BUG_ON(!host->card); mmc_claim_host(host); - mmc_deselect_cards(host); + if (!mmc_host_is_spi(host)) + mmc_deselect_cards(host); host->card->state &= ~MMC_STATE_HIGHSPEED; mmc_release_host(host); } @@ -574,7 +601,7 @@ static void mmc_sd_resume(struct mmc_host *host) err = mmc_sd_init_card(host, host->ocr, host->card); mmc_release_host(host); - if (err != MMC_ERR_NONE) { + if (err) { mmc_sd_remove(host); mmc_claim_host(host); @@ -608,11 +635,22 @@ int mmc_attach_sd(struct mmc_host *host, u32 ocr) int err; BUG_ON(!host); - BUG_ON(!host->claimed); + WARN_ON(!host->claimed); mmc_attach_bus(host, &mmc_sd_ops); /* + * We need to get OCR a different way for SPI. + */ + if (mmc_host_is_spi(host)) { + mmc_go_idle(host); + + err = mmc_spi_read_ocr(host, 0, &ocr); + if (err) + goto err; + } + + /* * Sanity check the voltages that the card claims to * support. */ @@ -644,7 +682,7 @@ int mmc_attach_sd(struct mmc_host *host, u32 ocr) * Detect and init the card. */ err = mmc_sd_init_card(host, host->ocr, NULL); - if (err != MMC_ERR_NONE) + if (err) goto err; mmc_release_host(host); @@ -666,6 +704,6 @@ err: printk(KERN_ERR "%s: error %d whilst initialising SD card\n", mmc_hostname(host), err); - return 0; + return err; } diff --git a/drivers/mmc/core/sd_ops.c b/drivers/mmc/core/sd_ops.c index 342f340..ee4029a 100644 --- a/drivers/mmc/core/sd_ops.c +++ b/drivers/mmc/core/sd_ops.c @@ -33,21 +33,21 @@ static int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card) if (card) { cmd.arg = card->rca << 16; - cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; + cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; } else { cmd.arg = 0; - cmd.flags = MMC_RSP_R1 | MMC_CMD_BCR; + cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_BCR; } err = mmc_wait_for_cmd(host, &cmd, 0); - if (err != MMC_ERR_NONE) + if (err) return err; /* Check that card supported application commands */ - if (!(cmd.resp[0] & R1_APP_CMD)) - return MMC_ERR_FAILED; + if (!mmc_host_is_spi(host) && !(cmd.resp[0] & R1_APP_CMD)) + return -EOPNOTSUPP; - return MMC_ERR_NONE; + return 0; } /** @@ -73,7 +73,7 @@ int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card, BUG_ON(!cmd); BUG_ON(retries < 0); - err = MMC_ERR_INVALID; + err = -EIO; /* * We have to resend MMC_APP_CMD for each attempt so @@ -83,8 +83,14 @@ int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card, memset(&mrq, 0, sizeof(struct mmc_request)); err = mmc_app_cmd(host, card); - if (err != MMC_ERR_NONE) + if (err) { + /* no point in retrying; no APP commands allowed */ + if (mmc_host_is_spi(host)) { + if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND) + break; + } continue; + } memset(&mrq, 0, sizeof(struct mmc_request)); @@ -97,8 +103,14 @@ int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card, mmc_wait_for_req(host, &mrq); err = cmd->error; - if (cmd->error == MMC_ERR_NONE) + if (!cmd->error) break; + + /* no point in retrying illegal APP commands */ + if (mmc_host_is_spi(host)) { + if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND) + break; + } } return err; @@ -127,14 +139,14 @@ int mmc_app_set_bus_width(struct mmc_card *card, int width) cmd.arg = SD_BUS_WIDTH_4; break; default: - return MMC_ERR_INVALID; + return -EINVAL; } err = mmc_wait_for_app_cmd(card->host, card, &cmd, MMC_CMD_RETRIES); - if (err != MMC_ERR_NONE) + if (err) return err; - return MMC_ERR_NONE; + return 0; } int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) @@ -147,23 +159,36 @@ int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) memset(&cmd, 0, sizeof(struct mmc_command)); cmd.opcode = SD_APP_OP_COND; - cmd.arg = ocr; - cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; + if (mmc_host_is_spi(host)) + cmd.arg = ocr & (1 << 30); /* SPI only defines one bit */ + else + cmd.arg = ocr; + cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR; for (i = 100; i; i--) { err = mmc_wait_for_app_cmd(host, NULL, &cmd, MMC_CMD_RETRIES); - if (err != MMC_ERR_NONE) + if (err) break; - if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0) + /* if we're just probing, do a single pass */ + if (ocr == 0) break; - err = MMC_ERR_TIMEOUT; + /* otherwise wait until reset completes */ + if (mmc_host_is_spi(host)) { + if (!(cmd.resp[0] & R1_SPI_IDLE)) + break; + } else { + if (cmd.resp[0] & MMC_CARD_BUSY) + break; + } + + err = -ETIMEDOUT; mmc_delay(10); } - if (rocr) + if (rocr && !mmc_host_is_spi(host)) *rocr = cmd.resp[0]; return err; @@ -174,6 +199,7 @@ int mmc_send_if_cond(struct mmc_host *host, u32 ocr) struct mmc_command cmd; int err; static const u8 test_pattern = 0xAA; + u8 result_pattern; /* * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND @@ -182,16 +208,21 @@ int mmc_send_if_cond(struct mmc_host *host, u32 ocr) */ cmd.opcode = SD_SEND_IF_COND; cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern; - cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR; + cmd.flags = MMC_RSP_SPI_R7 | MMC_RSP_R7 | MMC_CMD_BCR; err = mmc_wait_for_cmd(host, &cmd, 0); - if (err != MMC_ERR_NONE) + if (err) return err; - if ((cmd.resp[0] & 0xFF) != test_pattern) - return MMC_ERR_FAILED; + if (mmc_host_is_spi(host)) + result_pattern = cmd.resp[1] & 0xFF; + else + result_pattern = cmd.resp[0] & 0xFF; + + if (result_pattern != test_pattern) + return -EIO; - return MMC_ERR_NONE; + return 0; } int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca) @@ -209,12 +240,12 @@ int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca) cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); - if (err != MMC_ERR_NONE) + if (err) return err; *rca = cmd.resp[0] >> 16; - return MMC_ERR_NONE; + return 0; } int mmc_app_send_scr(struct mmc_card *card, u32 *scr) @@ -229,8 +260,10 @@ int mmc_app_send_scr(struct mmc_card *card, u32 *scr) BUG_ON(!card->host); BUG_ON(!scr); + /* NOTE: caller guarantees scr is heap-allocated */ + err = mmc_app_cmd(card->host, card); - if (err != MMC_ERR_NONE) + if (err) return err; memset(&mrq, 0, sizeof(struct mmc_request)); @@ -242,7 +275,7 @@ int mmc_app_send_scr(struct mmc_card *card, u32 *scr) cmd.opcode = SD_APP_SEND_SCR; cmd.arg = 0; - cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; + cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; data.blksz = 8; data.blocks = 1; @@ -252,19 +285,19 @@ int mmc_app_send_scr(struct mmc_card *card, u32 *scr) sg_init_one(&sg, scr, 8); - mmc_set_data_timeout(&data, card, 0); + mmc_set_data_timeout(&data, card); mmc_wait_for_req(card->host, &mrq); - if (cmd.error != MMC_ERR_NONE) + if (cmd.error) return cmd.error; - if (data.error != MMC_ERR_NONE) + if (data.error) return data.error; scr[0] = ntohl(scr[0]); scr[1] = ntohl(scr[1]); - return MMC_ERR_NONE; + return 0; } int mmc_sd_switch(struct mmc_card *card, int mode, int group, @@ -278,6 +311,8 @@ int mmc_sd_switch(struct mmc_card *card, int mode, int group, BUG_ON(!card); BUG_ON(!card->host); + /* NOTE: caller guarantees resp is heap-allocated */ + mode = !!mode; value &= 0xF; @@ -292,7 +327,7 @@ int mmc_sd_switch(struct mmc_card *card, int mode, int group, cmd.arg = mode << 31 | 0x00FFFFFF; cmd.arg &= ~(0xF << (group * 4)); cmd.arg |= value << (group * 4); - cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; + cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; data.blksz = 64; data.blocks = 1; @@ -302,15 +337,15 @@ int mmc_sd_switch(struct mmc_card *card, int mode, int group, sg_init_one(&sg, resp, 64); - mmc_set_data_timeout(&data, card, 0); + mmc_set_data_timeout(&data, card); mmc_wait_for_req(card->host, &mrq); - if (cmd.error != MMC_ERR_NONE) + if (cmd.error) return cmd.error; - if (data.error != MMC_ERR_NONE) + if (data.error) return data.error; - return MMC_ERR_NONE; + return 0; } diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c new file mode 100644 index 0000000..87a50f4 --- /dev/null +++ b/drivers/mmc/core/sdio.c @@ -0,0 +1,395 @@ +/* + * linux/drivers/mmc/sdio.c + * + * Copyright 2006-2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#include <linux/err.h> + +#include <linux/mmc/host.h> +#include <linux/mmc/card.h> +#include <linux/mmc/sdio.h> +#include <linux/mmc/sdio_func.h> + +#include "core.h" +#include "bus.h" +#include "sdio_bus.h" +#include "mmc_ops.h" +#include "sd_ops.h" +#include "sdio_ops.h" +#include "sdio_cis.h" + +static int sdio_read_fbr(struct sdio_func *func) +{ + int ret; + unsigned char data; + + ret = mmc_io_rw_direct(func->card, 0, 0, + SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF, 0, &data); + if (ret) + goto out; + + data &= 0x0f; + + if (data == 0x0f) { + ret = mmc_io_rw_direct(func->card, 0, 0, + SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF_EXT, 0, &data); + if (ret) + goto out; + } + + func->class = data; + +out: + return ret; +} + +static int sdio_init_func(struct mmc_card *card, unsigned int fn) +{ + int ret; + struct sdio_func *func; + + BUG_ON(fn > SDIO_MAX_FUNCS); + + func = sdio_alloc_func(card); + if (IS_ERR(func)) + return PTR_ERR(func); + + func->num = fn; + + ret = sdio_read_fbr(func); + if (ret) + goto fail; + + ret = sdio_read_func_cis(func); + if (ret) + goto fail; + + card->sdio_func[fn - 1] = func; + + return 0; + +fail: + /* + * It is okay to remove the function here even though we hold + * the host lock as we haven't registered the device yet. + */ + sdio_remove_func(func); + return ret; +} + +static int sdio_read_cccr(struct mmc_card *card) +{ + int ret; + int cccr_vsn; + unsigned char data; + + memset(&card->cccr, 0, sizeof(struct sdio_cccr)); + + ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CCCR, 0, &data); + if (ret) + goto out; + + cccr_vsn = data & 0x0f; + + if (cccr_vsn > SDIO_CCCR_REV_1_20) { + printk(KERN_ERR "%s: unrecognised CCCR structure version %d\n", + mmc_hostname(card->host), cccr_vsn); + return -EINVAL; + } + + card->cccr.sdio_vsn = (data & 0xf0) >> 4; + + ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CAPS, 0, &data); + if (ret) + goto out; + + if (data & SDIO_CCCR_CAP_SMB) + card->cccr.multi_block = 1; + if (data & SDIO_CCCR_CAP_LSC) + card->cccr.low_speed = 1; + if (data & SDIO_CCCR_CAP_4BLS) + card->cccr.wide_bus = 1; + + if (cccr_vsn >= SDIO_CCCR_REV_1_10) { + ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_POWER, 0, &data); + if (ret) + goto out; + + if (data & SDIO_POWER_SMPC) + card->cccr.high_power = 1; + } + + if (cccr_vsn >= SDIO_CCCR_REV_1_20) { + ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &data); + if (ret) + goto out; + + if (data & SDIO_SPEED_SHS) + card->cccr.high_speed = 1; + } + +out: + return ret; +} + +static int sdio_enable_wide(struct mmc_card *card) +{ + int ret; + u8 ctrl; + + if (!(card->host->caps & MMC_CAP_4_BIT_DATA)) + return 0; + + if (card->cccr.low_speed && !card->cccr.wide_bus) + return 0; + + ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl); + if (ret) + return ret; + + ctrl |= SDIO_BUS_WIDTH_4BIT; + + ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL); + if (ret) + return ret; + + mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); + + return 0; +} + +/* + * Host is being removed. Free up the current card. + */ +static void mmc_sdio_remove(struct mmc_host *host) +{ + int i; + + BUG_ON(!host); + BUG_ON(!host->card); + + for (i = 0;i < host->card->sdio_funcs;i++) { + if (host->card->sdio_func[i]) { + sdio_remove_func(host->card->sdio_func[i]); + host->card->sdio_func[i] = NULL; + } + } + + mmc_remove_card(host->card); + host->card = NULL; +} + +/* + * Card detection callback from host. + */ +static void mmc_sdio_detect(struct mmc_host *host) +{ + int err; + + BUG_ON(!host); + BUG_ON(!host->card); + + mmc_claim_host(host); + + /* + * Just check if our card has been removed. + */ + err = mmc_select_card(host->card); + + mmc_release_host(host); + + if (err) { + mmc_sdio_remove(host); + + mmc_claim_host(host); + mmc_detach_bus(host); + mmc_release_host(host); + } +} + + +static const struct mmc_bus_ops mmc_sdio_ops = { + .remove = mmc_sdio_remove, + .detect = mmc_sdio_detect, +}; + + +/* + * Starting point for SDIO card init. + */ +int mmc_attach_sdio(struct mmc_host *host, u32 ocr) +{ + int err; + int i, funcs; + struct mmc_card *card; + + BUG_ON(!host); + WARN_ON(!host->claimed); + + mmc_attach_bus(host, &mmc_sdio_ops); + + /* + * Sanity check the voltages that the card claims to + * support. + */ + if (ocr & 0x7F) { + printk(KERN_WARNING "%s: card claims to support voltages " + "below the defined range. These will be ignored.\n", + mmc_hostname(host)); + ocr &= ~0x7F; + } + + if (ocr & MMC_VDD_165_195) { + printk(KERN_WARNING "%s: SDIO card claims to support the " + "incompletely defined 'low voltage range'. This " + "will be ignored.\n", mmc_hostname(host)); + ocr &= ~MMC_VDD_165_195; + } + + host->ocr = mmc_select_voltage(host, ocr); + + /* + * Can we support the voltage(s) of the card(s)? + */ + if (!host->ocr) { + err = -EINVAL; + goto err; + } + + /* + * Inform the card of the voltage + */ + err = mmc_send_io_op_cond(host, host->ocr, &ocr); + if (err) + goto err; + + /* + * For SPI, enable CRC as appropriate. + */ + if (mmc_host_is_spi(host)) { + err = mmc_spi_set_crc(host, use_spi_crc); + if (err) + goto err; + } + + /* + * The number of functions on the card is encoded inside + * the ocr. + */ + funcs = (ocr & 0x70000000) >> 28; + + /* + * Allocate card structure. + */ + card = mmc_alloc_card(host); + if (IS_ERR(card)) { + err = PTR_ERR(card); + goto err; + } + + card->type = MMC_TYPE_SDIO; + card->sdio_funcs = funcs; + + host->card = card; + + /* + * For native busses: set card RCA and quit open drain mode. + */ + if (!mmc_host_is_spi(host)) { + err = mmc_send_relative_addr(host, &card->rca); + if (err) + goto remove; + + mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); + } + + /* + * Select card, as all following commands rely on that. + */ + if (!mmc_host_is_spi(host)) { + err = mmc_select_card(card); + if (err) + goto remove; + } + + /* + * Read the common registers. + */ + err = sdio_read_cccr(card); + if (err) + goto remove; + + /* + * Read the common CIS tuples. + */ + err = sdio_read_common_cis(card); + if (err) + goto remove; + + /* + * No support for high-speed yet, so just set + * the card's maximum speed. + */ + mmc_set_clock(host, card->cis.max_dtr); + + /* + * Switch to wider bus (if supported). + */ + err = sdio_enable_wide(card); + if (err) + goto remove; + + /* + * Initialize (but don't add) all present functions. + */ + for (i = 0;i < funcs;i++) { + err = sdio_init_func(host->card, i + 1); + if (err) + goto remove; + } + + mmc_release_host(host); + + /* + * First add the card to the driver model... + */ + err = mmc_add_card(host->card); + if (err) + goto remove_added; + + /* + * ...then the SDIO functions. + */ + for (i = 0;i < funcs;i++) { + err = sdio_add_func(host->card->sdio_func[i]); + if (err) + goto remove_added; + } + + return 0; + + +remove_added: + /* Remove without lock if the device has been added. */ + mmc_sdio_remove(host); + mmc_claim_host(host); +remove: + /* And with lock if it hasn't been added. */ + if (host->card) + mmc_sdio_remove(host); +err: + mmc_detach_bus(host); + mmc_release_host(host); + + printk(KERN_ERR "%s: error %d whilst initialising SDIO card\n", + mmc_hostname(host), err); + + return err; +} + diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c new file mode 100644 index 0000000..0713a8c --- /dev/null +++ b/drivers/mmc/core/sdio_bus.c @@ -0,0 +1,270 @@ +/* + * linux/drivers/mmc/core/sdio_bus.c + * + * Copyright 2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * SDIO function driver model + */ + +#include <linux/device.h> +#include <linux/err.h> + +#include <linux/mmc/card.h> +#include <linux/mmc/sdio_func.h> + +#include "sdio_cis.h" +#include "sdio_bus.h" + +#define dev_to_sdio_func(d) container_of(d, struct sdio_func, dev) +#define to_sdio_driver(d) container_of(d, struct sdio_driver, drv) + +/* show configuration fields */ +#define sdio_config_attr(field, format_string) \ +static ssize_t \ +field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ +{ \ + struct sdio_func *func; \ + \ + func = dev_to_sdio_func (dev); \ + return sprintf (buf, format_string, func->field); \ +} + +sdio_config_attr(class, "0x%02x\n"); +sdio_config_attr(vendor, "0x%04x\n"); +sdio_config_attr(device, "0x%04x\n"); + +static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct sdio_func *func = dev_to_sdio_func (dev); + + return sprintf(buf, "sdio:c%02Xv%04Xd%04X\n", + func->class, func->vendor, func->device); +} + +static struct device_attribute sdio_dev_attrs[] = { + __ATTR_RO(class), + __ATTR_RO(vendor), + __ATTR_RO(device), + __ATTR_RO(modalias), + __ATTR_NULL, +}; + +static const struct sdio_device_id *sdio_match_one(struct sdio_func *func, + const struct sdio_device_id *id) +{ + if (id->class != (__u8)SDIO_ANY_ID && id->class != func->class) + return NULL; + if (id->vendor != (__u16)SDIO_ANY_ID && id->vendor != func->vendor) + return NULL; + if (id->device != (__u16)SDIO_ANY_ID && id->device != func->device) + return NULL; + return id; +} + +static const struct sdio_device_id *sdio_match_device(struct sdio_func *func, + struct sdio_driver *sdrv) +{ + const struct sdio_device_id *ids; + + ids = sdrv->id_table; + + if (ids) { + while (ids->class || ids->vendor || ids->device) { + if (sdio_match_one(func, ids)) + return ids; + ids++; + } + } + + return NULL; +} + +static int sdio_bus_match(struct device *dev, struct device_driver *drv) +{ + struct sdio_func *func = dev_to_sdio_func(dev); + struct sdio_driver *sdrv = to_sdio_driver(drv); + + if (sdio_match_device(func, sdrv)) + return 1; + + return 0; +} + +static int +sdio_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf, + int buf_size) +{ + struct sdio_func *func = dev_to_sdio_func(dev); + int i = 0, length = 0; + + if (add_uevent_var(envp, num_envp, &i, + buf, buf_size, &length, + "SDIO_CLASS=%02X", func->class)) + return -ENOMEM; + + if (add_uevent_var(envp, num_envp, &i, + buf, buf_size, &length, + "SDIO_ID=%04X:%04X", func->vendor, func->device)) + return -ENOMEM; + + if (add_uevent_var(envp, num_envp, &i, + buf, buf_size, &length, + "MODALIAS=sdio:c%02Xv%04Xd%04X", + func->class, func->vendor, func->device)) + return -ENOMEM; + + envp[i] = NULL; + + return 0; +} + +static int sdio_bus_probe(struct device *dev) +{ + struct sdio_driver *drv = to_sdio_driver(dev->driver); + struct sdio_func *func = dev_to_sdio_func(dev); + const struct sdio_device_id *id; + int ret; + + id = sdio_match_device(func, drv); + if (!id) + return -ENODEV; + + /* Set the default block size so the driver is sure it's something + * sensible. */ + sdio_claim_host(func); + ret = sdio_set_block_size(func, 0); + sdio_release_host(func); + if (ret) + return ret; + + return drv->probe(func, id); +} + +static int sdio_bus_remove(struct device *dev) +{ + struct sdio_driver *drv = to_sdio_driver(dev->driver); + struct sdio_func *func = dev_to_sdio_func(dev); + + drv->remove(func); + + if (func->irq_handler) { + printk(KERN_WARNING "WARNING: driver %s did not remove " + "its interrupt handler!\n", drv->name); + sdio_claim_host(func); + sdio_release_irq(func); + sdio_release_host(func); + } + + return 0; +} + +static struct bus_type sdio_bus_type = { + .name = "sdio", + .dev_attrs = sdio_dev_attrs, + .match = sdio_bus_match, + .uevent = sdio_bus_uevent, + .probe = sdio_bus_probe, + .remove = sdio_bus_remove, +}; + +int sdio_register_bus(void) +{ + return bus_register(&sdio_bus_type); +} + +void sdio_unregister_bus(void) +{ + bus_unregister(&sdio_bus_type); +} + +/** + * sdio_register_driver - register a function driver + * @drv: SDIO function driver + */ +int sdio_register_driver(struct sdio_driver *drv) +{ + drv->drv.name = drv->name; + drv->drv.bus = &sdio_bus_type; + return driver_register(&drv->drv); +} +EXPORT_SYMBOL_GPL(sdio_register_driver); + +/** + * sdio_unregister_driver - unregister a function driver + * @drv: SDIO function driver + */ +void sdio_unregister_driver(struct sdio_driver *drv) +{ + drv->drv.bus = &sdio_bus_type; + driver_unregister(&drv->drv); +} +EXPORT_SYMBOL_GPL(sdio_unregister_driver); + +static void sdio_release_func(struct device *dev) +{ + struct sdio_func *func = dev_to_sdio_func(dev); + + sdio_free_func_cis(func); + + if (func->info) + kfree(func->info); + + kfree(func); +} + +/* + * Allocate and initialise a new SDIO function structure. + */ +struct sdio_func *sdio_alloc_func(struct mmc_card *card) +{ + struct sdio_func *func; + + func = kzalloc(sizeof(struct sdio_func), GFP_KERNEL); + if (!func) + return ERR_PTR(-ENOMEM); + + func->card = card; + + device_initialize(&func->dev); + + func->dev.parent = &card->dev; + func->dev.bus = &sdio_bus_type; + func->dev.release = sdio_release_func; + + return func; +} + +/* + * Register a new SDIO function with the driver model. + */ +int sdio_add_func(struct sdio_func *func) +{ + int ret; + + snprintf(func->dev.bus_id, sizeof(func->dev.bus_id), + "%s:%d", mmc_card_id(func->card), func->num); + + ret = device_add(&func->dev); + if (ret == 0) + sdio_func_set_present(func); + + return ret; +} + +/* + * Unregister a SDIO function with the driver model, and + * (eventually) free it. + */ +void sdio_remove_func(struct sdio_func *func) +{ + if (sdio_func_present(func)) + device_del(&func->dev); + + put_device(&func->dev); +} + diff --git a/drivers/mmc/core/sdio_bus.h b/drivers/mmc/core/sdio_bus.h new file mode 100644 index 0000000..567a768 --- /dev/null +++ b/drivers/mmc/core/sdio_bus.h @@ -0,0 +1,22 @@ +/* + * linux/drivers/mmc/core/sdio_bus.h + * + * Copyright 2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ +#ifndef _MMC_CORE_SDIO_BUS_H +#define _MMC_CORE_SDIO_BUS_H + +struct sdio_func *sdio_alloc_func(struct mmc_card *card); +int sdio_add_func(struct sdio_func *func); +void sdio_remove_func(struct sdio_func *func); + +int sdio_register_bus(void); +void sdio_unregister_bus(void); + +#endif + diff --git a/drivers/mmc/core/sdio_cis.c b/drivers/mmc/core/sdio_cis.c new file mode 100644 index 0000000..d5e51b1 --- /dev/null +++ b/drivers/mmc/core/sdio_cis.c @@ -0,0 +1,346 @@ +/* + * linux/drivers/mmc/core/sdio_cis.c + * + * Author: Nicolas Pitre + * Created: June 11, 2007 + * Copyright: MontaVista Software Inc. + * + * Copyright 2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#include <linux/kernel.h> + +#include <linux/mmc/host.h> +#include <linux/mmc/card.h> +#include <linux/mmc/sdio.h> +#include <linux/mmc/sdio_func.h> + +#include "sdio_cis.h" +#include "sdio_ops.h" + +static int cistpl_vers_1(struct mmc_card *card, struct sdio_func *func, + const unsigned char *buf, unsigned size) +{ + unsigned i, nr_strings; + char **buffer, *string; + + buf += 2; + size -= 2; + + nr_strings = 0; + for (i = 0; i < size; i++) { + if (buf[i] == 0xff) + break; + if (buf[i] == 0) + nr_strings++; + } + + if (buf[i-1] != '\0') { + printk(KERN_WARNING "SDIO: ignoring broken CISTPL_VERS_1\n"); + return 0; + } + + size = i; + + buffer = kzalloc(sizeof(char*) * nr_strings + size, GFP_KERNEL); + if (!buffer) + return -ENOMEM; + + string = (char*)(buffer + nr_strings); + + for (i = 0; i < nr_strings; i++) { + buffer[i] = string; + strcpy(string, buf); + string += strlen(string) + 1; + buf += strlen(buf) + 1; + } + + if (func) { + func->num_info = nr_strings; + func->info = (const char**)buffer; + } else { + card->num_info = nr_strings; + card->info = (const char**)buffer; + } + + return 0; +} + +static int cistpl_manfid(struct mmc_card *card, struct sdio_func *func, + const unsigned char *buf, unsigned size) +{ + unsigned int vendor, device; + + /* TPLMID_MANF */ + vendor = buf[0] | (buf[1] << 8); + + /* TPLMID_CARD */ + device = buf[2] | (buf[3] << 8); + + if (func) { + func->vendor = vendor; + func->device = device; + } else { + card->cis.vendor = vendor; + card->cis.device = device; + } + + return 0; +} + +static const unsigned char speed_val[16] = + { 0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 }; +static const unsigned int speed_unit[8] = + { 10000, 100000, 1000000, 10000000, 0, 0, 0, 0 }; + +static int cistpl_funce_common(struct mmc_card *card, + const unsigned char *buf, unsigned size) +{ + if (size < 0x04 || buf[0] != 0) + return -EINVAL; + + /* TPLFE_FN0_BLK_SIZE */ + card->cis.blksize = buf[1] | (buf[2] << 8); + + /* TPLFE_MAX_TRAN_SPEED */ + card->cis.max_dtr = speed_val[(buf[3] >> 3) & 15] * + speed_unit[buf[3] & 7]; + + return 0; +} + +static int cistpl_funce_func(struct sdio_func *func, + const unsigned char *buf, unsigned size) +{ + unsigned vsn; + unsigned min_size; + + vsn = func->card->cccr.sdio_vsn; + min_size = (vsn == SDIO_SDIO_REV_1_00) ? 28 : 42; + + if (size < min_size || buf[0] != 1) + return -EINVAL; + + /* TPLFE_MAX_BLK_SIZE */ + func->max_blksize = buf[12] | (buf[13] << 8); + + return 0; +} + +static int cistpl_funce(struct mmc_card *card, struct sdio_func *func, + const unsigned char *buf, unsigned size) +{ + int ret; + + /* + * There should be two versions of the CISTPL_FUNCE tuple, + * one for the common CIS (function 0) and a version used by + * the individual function's CIS (1-7). Yet, the later has a + * different length depending on the SDIO spec version. + */ + if (func) + ret = cistpl_funce_func(func, buf, size); + else + ret = cistpl_funce_common(card, buf, size); + + if (ret) { + printk(KERN_ERR "%s: bad CISTPL_FUNCE size %u " + "type %u\n", mmc_hostname(card->host), size, buf[0]); + return ret; + } + + return 0; +} + +typedef int (tpl_parse_t)(struct mmc_card *, struct sdio_func *, + const unsigned char *, unsigned); + +struct cis_tpl { + unsigned char code; + unsigned char min_size; + tpl_parse_t *parse; +}; + +static const struct cis_tpl cis_tpl_list[] = { + { 0x15, 3, cistpl_vers_1 }, + { 0x20, 4, cistpl_manfid }, + { 0x21, 2, /* cistpl_funcid */ }, + { 0x22, 0, cistpl_funce }, +}; + +static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func) +{ + int ret; + struct sdio_func_tuple *this, **prev; + unsigned i, ptr = 0; + + /* + * Note that this works for the common CIS (function number 0) as + * well as a function's CIS * since SDIO_CCCR_CIS and SDIO_FBR_CIS + * have the same offset. + */ + for (i = 0; i < 3; i++) { + unsigned char x, fn; + + if (func) + fn = func->num; + else + fn = 0; + + ret = mmc_io_rw_direct(card, 0, 0, + SDIO_FBR_BASE(fn) + SDIO_FBR_CIS + i, 0, &x); + if (ret) + return ret; + ptr |= x << (i * 8); + } + + if (func) + prev = &func->tuples; + else + prev = &card->tuples; + + BUG_ON(*prev); + + do { + unsigned char tpl_code, tpl_link; + + ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_code); + if (ret) + break; + + /* 0xff means we're done */ + if (tpl_code == 0xff) + break; + + ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_link); + if (ret) + break; + + this = kmalloc(sizeof(*this) + tpl_link, GFP_KERNEL); + if (!this) + return -ENOMEM; + + for (i = 0; i < tpl_link; i++) { + ret = mmc_io_rw_direct(card, 0, 0, + ptr + i, 0, &this->data[i]); + if (ret) + break; + } + if (ret) { + kfree(this); + break; + } + + for (i = 0; i < ARRAY_SIZE(cis_tpl_list); i++) + if (cis_tpl_list[i].code == tpl_code) + break; + if (i >= ARRAY_SIZE(cis_tpl_list)) { + /* this tuple is unknown to the core */ + this->next = NULL; + this->code = tpl_code; + this->size = tpl_link; + *prev = this; + prev = &this->next; + printk(KERN_DEBUG + "%s: queuing CIS tuple 0x%02x length %u\n", + mmc_hostname(card->host), tpl_code, tpl_link); + } else { + const struct cis_tpl *tpl = cis_tpl_list + i; + if (tpl_link < tpl->min_size) { + printk(KERN_ERR + "%s: bad CIS tuple 0x%02x (length = %u, expected >= %u)\n", + mmc_hostname(card->host), + tpl_code, tpl_link, tpl->min_size); + ret = -EINVAL; + } else if (tpl->parse) { + ret = tpl->parse(card, func, + this->data, tpl_link); + } + kfree(this); + } + + ptr += tpl_link; + } while (!ret); + + /* + * Link in all unknown tuples found in the common CIS so that + * drivers don't have to go digging in two places. + */ + if (func) + *prev = card->tuples; + + return ret; +} + +int sdio_read_common_cis(struct mmc_card *card) +{ + return sdio_read_cis(card, NULL); +} + +void sdio_free_common_cis(struct mmc_card *card) +{ + struct sdio_func_tuple *tuple, *victim; + + tuple = card->tuples; + + while (tuple) { + victim = tuple; + tuple = tuple->next; + kfree(victim); + } + + card->tuples = NULL; +} + +int sdio_read_func_cis(struct sdio_func *func) +{ + int ret; + + ret = sdio_read_cis(func->card, func); + if (ret) + return ret; + + /* + * Since we've linked to tuples in the card structure, + * we must make sure we have a reference to it. + */ + get_device(&func->card->dev); + + /* + * Vendor/device id is optional for function CIS, so + * copy it from the card structure as needed. + */ + if (func->vendor == 0) { + func->vendor = func->card->cis.vendor; + func->device = func->card->cis.device; + } + + return 0; +} + +void sdio_free_func_cis(struct sdio_func *func) +{ + struct sdio_func_tuple *tuple, *victim; + + tuple = func->tuples; + + while (tuple && tuple != func->card->tuples) { + victim = tuple; + tuple = tuple->next; + kfree(victim); + } + + func->tuples = NULL; + + /* + * We have now removed the link to the tuples in the + * card structure, so remove the reference. + */ + put_device(&func->card->dev); +} + diff --git a/drivers/mmc/core/sdio_cis.h b/drivers/mmc/core/sdio_cis.h new file mode 100644 index 0000000..4d903c2 --- /dev/null +++ b/drivers/mmc/core/sdio_cis.h @@ -0,0 +1,23 @@ +/* + * linux/drivers/mmc/core/sdio_cis.h + * + * Author: Nicolas Pitre + * Created: June 11, 2007 + * Copyright: MontaVista Software Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#ifndef _MMC_SDIO_CIS_H +#define _MMC_SDIO_CIS_H + +int sdio_read_common_cis(struct mmc_card *card); +void sdio_free_common_cis(struct mmc_card *card); + +int sdio_read_func_cis(struct sdio_func *func); +void sdio_free_func_cis(struct sdio_func *func); + +#endif diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c new file mode 100644 index 0000000..625b92c --- /dev/null +++ b/drivers/mmc/core/sdio_io.c @@ -0,0 +1,548 @@ +/* + * linux/drivers/mmc/core/sdio_io.c + * + * Copyright 2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#include <linux/mmc/host.h> +#include <linux/mmc/card.h> +#include <linux/mmc/sdio.h> +#include <linux/mmc/sdio_func.h> + +#include "sdio_ops.h" + +/** + * sdio_claim_host - exclusively claim a bus for a certain SDIO function + * @func: SDIO function that will be accessed + * + * Claim a bus for a set of operations. The SDIO function given + * is used to figure out which bus is relevant. + */ +void sdio_claim_host(struct sdio_func *func) +{ + BUG_ON(!func); + BUG_ON(!func->card); + + mmc_claim_host(func->card->host); +} +EXPORT_SYMBOL_GPL(sdio_claim_host); + +/** + * sdio_release_host - release a bus for a certain SDIO function + * @func: SDIO function that was accessed + * + * Release a bus, allowing others to claim the bus for their + * operations. + */ +void sdio_release_host(struct sdio_func *func) +{ + BUG_ON(!func); + BUG_ON(!func->card); + + mmc_release_host(func->card->host); +} +EXPORT_SYMBOL_GPL(sdio_release_host); + +/** + * sdio_enable_func - enables a SDIO function for usage + * @func: SDIO function to enable + * + * Powers up and activates a SDIO function so that register + * access is possible. + */ +int sdio_enable_func(struct sdio_func *func) +{ + int ret; + unsigned char reg; + unsigned long timeout; + + BUG_ON(!func); + BUG_ON(!func->card); + + pr_debug("SDIO: Enabling device %s...\n", sdio_func_id(func)); + + ret = mmc_io_rw_direct(func->card, 0, 0, SDIO_CCCR_IOEx, 0, ®); + if (ret) + goto err; + + reg |= 1 << func->num; + + ret = mmc_io_rw_direct(func->card, 1, 0, SDIO_CCCR_IOEx, reg, NULL); + if (ret) + goto err; + + /* + * FIXME: This should timeout based on information in the CIS, + * but we don't have card to parse that yet. + */ + timeout = jiffies + HZ; + + while (1) { + ret = mmc_io_rw_direct(func->card, 0, 0, SDIO_CCCR_IORx, 0, ®); + if (ret) + goto err; + if (reg & (1 << func->num)) + break; + ret = -ETIME; + if (time_after(jiffies, timeout)) + goto err; + } + + pr_debug("SDIO: Enabled device %s\n", sdio_func_id(func)); + + return 0; + +err: + pr_debug("SDIO: Failed to enable device %s\n", sdio_func_id(func)); + return ret; +} +EXPORT_SYMBOL_GPL(sdio_enable_func); + +/** + * sdio_disable_func - disable a SDIO function + * @func: SDIO function to disable + * + * Powers down and deactivates a SDIO function. Register access + * to this function will fail until the function is reenabled. + */ +int sdio_disable_func(struct sdio_func *func) +{ + int ret; + unsigned char reg; + + BUG_ON(!func); + BUG_ON(!func->card); + + pr_debug("SDIO: Disabling device %s...\n", sdio_func_id(func)); + + ret = mmc_io_rw_direct(func->card, 0, 0, SDIO_CCCR_IOEx, 0, ®); + if (ret) + goto err; + + reg &= ~(1 << func->num); + + ret = mmc_io_rw_direct(func->card, 1, 0, SDIO_CCCR_IOEx, reg, NULL); + if (ret) + goto err; + + pr_debug("SDIO: Disabled device %s\n", sdio_func_id(func)); + + return 0; + +err: + pr_debug("SDIO: Failed to disable device %s\n", sdio_func_id(func)); + return -EIO; +} +EXPORT_SYMBOL_GPL(sdio_disable_func); + +/** + * sdio_set_block_size - set the block size of an SDIO function + * @func: SDIO function to change + * @blksz: new block size or 0 to use the default. + * + * The default block size is the largest supported by both the function + * and the host, with a maximum of 512 to ensure that arbitrarily sized + * data transfer use the optimal (least) number of commands. + * + * A driver may call this to override the default block size set by the + * core. This can be used to set a block size greater than the maximum + * that reported by the card; it is the driver's responsibility to ensure + * it uses a value that the card supports. + * + * Returns 0 on success, -EINVAL if the host does not support the + * requested block size, or -EIO (etc.) if one of the resultant FBR block + * size register writes failed. + * + */ +int sdio_set_block_size(struct sdio_func *func, unsigned blksz) +{ + int ret; + + if (blksz > func->card->host->max_blk_size) + return -EINVAL; + + if (blksz == 0) { + blksz = min(min( + func->max_blksize, + func->card->host->max_blk_size), + 512u); + } + + ret = mmc_io_rw_direct(func->card, 1, 0, + SDIO_FBR_BASE(func->num) + SDIO_FBR_BLKSIZE, + blksz & 0xff, NULL); + if (ret) + return ret; + ret = mmc_io_rw_direct(func->card, 1, 0, + SDIO_FBR_BASE(func->num) + SDIO_FBR_BLKSIZE + 1, + (blksz >> 8) & 0xff, NULL); + if (ret) + return ret; + func->cur_blksize = blksz; + return 0; +} + +EXPORT_SYMBOL_GPL(sdio_set_block_size); + +/* Split an arbitrarily sized data transfer into several + * IO_RW_EXTENDED commands. */ +static int sdio_io_rw_ext_helper(struct sdio_func *func, int write, + unsigned addr, int incr_addr, u8 *buf, unsigned size) +{ + unsigned remainder = size; + unsigned max_blocks; + int ret; + + /* Do the bulk of the transfer using block mode (if supported). */ + if (func->card->cccr.multi_block) { + /* Blocks per command is limited by host count, host transfer + * size (we only use a single sg entry) and the maximum for + * IO_RW_EXTENDED of 511 blocks. */ + max_blocks = min(min( + func->card->host->max_blk_count, + func->card->host->max_seg_size / func->cur_blksize), + 511u); + + while (remainder > func->cur_blksize) { + unsigned blocks; + + blocks = remainder / func->cur_blksize; + if (blocks > max_blocks) + blocks = max_blocks; + size = blocks * func->cur_blksize; + + ret = mmc_io_rw_extended(func->card, write, + func->num, addr, incr_addr, buf, + blocks, func->cur_blksize); + if (ret) + return ret; + + remainder -= size; + buf += size; + if (incr_addr) + addr += size; + } + } + + /* Write the remainder using byte mode. */ + while (remainder > 0) { + size = remainder; + if (size > func->cur_blksize) + size = func->cur_blksize; + if (size > 512) + size = 512; /* maximum size for byte mode */ + + ret = mmc_io_rw_extended(func->card, write, func->num, addr, + incr_addr, buf, 1, size); + if (ret) + return ret; + + remainder -= size; + buf += size; + if (incr_addr) + addr += size; + } + return 0; +} + +/** + * sdio_readb - read a single byte from a SDIO function + * @func: SDIO function to access + * @addr: address to read + * @err_ret: optional status value from transfer + * + * Reads a single byte from the address space of a given SDIO + * function. If there is a problem reading the address, 0xff + * is returned and @err_ret will contain the error code. + */ +unsigned char sdio_readb(struct sdio_func *func, unsigned int addr, + int *err_ret) +{ + int ret; + unsigned char val; + + BUG_ON(!func); + + if (err_ret) + *err_ret = 0; + + ret = mmc_io_rw_direct(func->card, 0, func->num, addr, 0, &val); + if (ret) { + if (err_ret) + *err_ret = ret; + return 0xFF; + } + + return val; +} +EXPORT_SYMBOL_GPL(sdio_readb); + +/** + * sdio_writeb - write a single byte to a SDIO function + * @func: SDIO function to access + * @b: byte to write + * @addr: address to write to + * @err_ret: optional status value from transfer + * + * Writes a single byte to the address space of a given SDIO + * function. @err_ret will contain the status of the actual + * transfer. + */ +void sdio_writeb(struct sdio_func *func, unsigned char b, unsigned int addr, + int *err_ret) +{ + int ret; + + BUG_ON(!func); + + ret = mmc_io_rw_direct(func->card, 1, func->num, addr, b, NULL); + if (err_ret) + *err_ret = ret; +} +EXPORT_SYMBOL_GPL(sdio_writeb); + +/** + * sdio_memcpy_fromio - read a chunk of memory from a SDIO function + * @func: SDIO function to access + * @dst: buffer to store the data + * @addr: address to begin reading from + * @count: number of bytes to read + * + * Reads from the address space of a given SDIO function. Return + * value indicates if the transfer succeeded or not. + */ +int sdio_memcpy_fromio(struct sdio_func *func, void *dst, + unsigned int addr, int count) +{ + return sdio_io_rw_ext_helper(func, 0, addr, 1, dst, count); +} +EXPORT_SYMBOL_GPL(sdio_memcpy_fromio); + +/** + * sdio_memcpy_toio - write a chunk of memory to a SDIO function + * @func: SDIO function to access + * @addr: address to start writing to + * @src: buffer that contains the data to write + * @count: number of bytes to write + * + * Writes to the address space of a given SDIO function. Return + * value indicates if the transfer succeeded or not. + */ +int sdio_memcpy_toio(struct sdio_func *func, unsigned int addr, + void *src, int count) +{ + return sdio_io_rw_ext_helper(func, 1, addr, 1, src, count); +} +EXPORT_SYMBOL_GPL(sdio_memcpy_toio); + +/** + * sdio_readsb - read from a FIFO on a SDIO function + * @func: SDIO function to access + * @dst: buffer to store the data + * @addr: address of (single byte) FIFO + * @count: number of bytes to read + * + * Reads from the specified FIFO of a given SDIO function. Return + * value indicates if the transfer succeeded or not. + */ +int sdio_readsb(struct sdio_func *func, void *dst, unsigned int addr, + int count) +{ + return sdio_io_rw_ext_helper(func, 0, addr, 0, dst, count); +} + +EXPORT_SYMBOL_GPL(sdio_readsb); + +/** + * sdio_writesb - write to a FIFO of a SDIO function + * @func: SDIO function to access + * @addr: address of (single byte) FIFO + * @src: buffer that contains the data to write + * @count: number of bytes to write + * + * Writes to the specified FIFO of a given SDIO function. Return + * value indicates if the transfer succeeded or not. + */ +int sdio_writesb(struct sdio_func *func, unsigned int addr, void *src, + int count) +{ + return sdio_io_rw_ext_helper(func, 1, addr, 0, src, count); +} +EXPORT_SYMBOL_GPL(sdio_writesb); + +/** + * sdio_readw - read a 16 bit integer from a SDIO function + * @func: SDIO function to access + * @addr: address to read + * @err_ret: optional status value from transfer + * + * Reads a 16 bit integer from the address space of a given SDIO + * function. If there is a problem reading the address, 0xffff + * is returned and @err_ret will contain the error code. + */ +unsigned short sdio_readw(struct sdio_func *func, unsigned int addr, + int *err_ret) +{ + int ret; + + if (err_ret) + *err_ret = 0; + + ret = sdio_memcpy_fromio(func, func->tmpbuf, addr, 2); + if (ret) { + if (err_ret) + *err_ret = ret; + return 0xFFFF; + } + + return le16_to_cpu(*(u16*)func->tmpbuf); +} +EXPORT_SYMBOL_GPL(sdio_readw); + +/** + * sdio_writew - write a 16 bit integer to a SDIO function + * @func: SDIO function to access + * @b: integer to write + * @addr: address to write to + * @err_ret: optional status value from transfer + * + * Writes a 16 bit integer to the address space of a given SDIO + * function. @err_ret will contain the status of the actual + * transfer. + */ +void sdio_writew(struct sdio_func *func, unsigned short b, unsigned int addr, + int *err_ret) +{ + int ret; + + *(u16*)func->tmpbuf = cpu_to_le16(b); + + ret = sdio_memcpy_toio(func, addr, func->tmpbuf, 2); + if (err_ret) + *err_ret = ret; +} +EXPORT_SYMBOL_GPL(sdio_writew); + +/** + * sdio_readl - read a 32 bit integer from a SDIO function + * @func: SDIO function to access + * @addr: address to read + * @err_ret: optional status value from transfer + * + * Reads a 32 bit integer from the address space of a given SDIO + * function. If there is a problem reading the address, + * 0xffffffff is returned and @err_ret will contain the error + * code. + */ +unsigned long sdio_readl(struct sdio_func *func, unsigned int addr, + int *err_ret) +{ + int ret; + + if (err_ret) + *err_ret = 0; + + ret = sdio_memcpy_fromio(func, func->tmpbuf, addr, 4); + if (ret) { + if (err_ret) + *err_ret = ret; + return 0xFFFFFFFF; + } + + return le32_to_cpu(*(u32*)func->tmpbuf); +} +EXPORT_SYMBOL_GPL(sdio_readl); + +/** + * sdio_writel - write a 32 bit integer to a SDIO function + * @func: SDIO function to access + * @b: integer to write + * @addr: address to write to + * @err_ret: optional status value from transfer + * + * Writes a 32 bit integer to the address space of a given SDIO + * function. @err_ret will contain the status of the actual + * transfer. + */ +void sdio_writel(struct sdio_func *func, unsigned long b, unsigned int addr, + int *err_ret) +{ + int ret; + + *(u32*)func->tmpbuf = cpu_to_le32(b); + + ret = sdio_memcpy_toio(func, addr, func->tmpbuf, 4); + if (err_ret) + *err_ret = ret; +} +EXPORT_SYMBOL_GPL(sdio_writel); + +/** + * sdio_f0_readb - read a single byte from SDIO function 0 + * @func: an SDIO function of the card + * @addr: address to read + * @err_ret: optional status value from transfer + * + * Reads a single byte from the address space of SDIO function 0. + * If there is a problem reading the address, 0xff is returned + * and @err_ret will contain the error code. + */ +unsigned char sdio_f0_readb(struct sdio_func *func, unsigned int addr, + int *err_ret) +{ + int ret; + unsigned char val; + + BUG_ON(!func); + + if (err_ret) + *err_ret = 0; + + ret = mmc_io_rw_direct(func->card, 0, 0, addr, 0, &val); + if (ret) { + if (err_ret) + *err_ret = ret; + return 0xFF; + } + + return val; +} +EXPORT_SYMBOL_GPL(sdio_f0_readb); + +/** + * sdio_f0_writeb - write a single byte to SDIO function 0 + * @func: an SDIO function of the card + * @b: byte to write + * @addr: address to write to + * @err_ret: optional status value from transfer + * + * Writes a single byte to the address space of SDIO function 0. + * @err_ret will contain the status of the actual transfer. + * + * Only writes to the vendor specific CCCR registers (0xF0 - + * 0xFF) are permiited; @err_ret will be set to -EINVAL for * + * writes outside this range. + */ +void sdio_f0_writeb(struct sdio_func *func, unsigned char b, unsigned int addr, + int *err_ret) +{ + int ret; + + BUG_ON(!func); + + if (addr < 0xF0 || addr > 0xFF) { + if (err_ret) + *err_ret = -EINVAL; + return; + } + + ret = mmc_io_rw_direct(func->card, 1, 0, addr, b, NULL); + if (err_ret) + *err_ret = ret; +} +EXPORT_SYMBOL_GPL(sdio_f0_writeb); diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c new file mode 100644 index 0000000..3bd3021 --- /dev/null +++ b/drivers/mmc/core/sdio_irq.c @@ -0,0 +1,267 @@ +/* + * linux/drivers/mmc/core/sdio_irq.c + * + * Author: Nicolas Pitre + * Created: June 18, 2007 + * Copyright: MontaVista Software Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/kthread.h> +#include <linux/wait.h> +#include <linux/delay.h> + +#include <linux/mmc/core.h> +#include <linux/mmc/host.h> +#include <linux/mmc/card.h> +#include <linux/mmc/sdio.h> +#include <linux/mmc/sdio_func.h> + +#include "sdio_ops.h" + +static int process_sdio_pending_irqs(struct mmc_card *card) +{ + int i, ret, count; + unsigned char pending; + + ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_INTx, 0, &pending); + if (ret) { + printk(KERN_DEBUG "%s: error %d reading SDIO_CCCR_INTx\n", + mmc_card_id(card), ret); + return ret; + } + + count = 0; + for (i = 1; i <= 7; i++) { + if (pending & (1 << i)) { + struct sdio_func *func = card->sdio_func[i - 1]; + if (!func) { + printk(KERN_WARNING "%s: pending IRQ for " + "non-existant function\n", + mmc_card_id(card)); + ret = -EINVAL; + } else if (func->irq_handler) { + func->irq_handler(func); + count++; + } else { + printk(KERN_WARNING "%s: pending IRQ with no handler\n", + sdio_func_id(func)); + ret = -EINVAL; + } + } + } + + if (count) + return count; + + return ret; +} + +static int sdio_irq_thread(void *_host) +{ + struct mmc_host *host = _host; + struct sched_param param = { .sched_priority = 1 }; + unsigned long period, idle_period; + int ret; + + sched_setscheduler(current, SCHED_FIFO, ¶m); + + /* + * We want to allow for SDIO cards to work even on non SDIO + * aware hosts. One thing that non SDIO host cannot do is + * asynchronous notification of pending SDIO card interrupts + * hence we poll for them in that case. + */ + idle_period = msecs_to_jiffies(10); + period = (host->caps & MMC_CAP_SDIO_IRQ) ? + MAX_SCHEDULE_TIMEOUT : idle_period; + + pr_debug("%s: IRQ thread started (poll period = %lu jiffies)\n", + mmc_hostname(host), period); + + do { + /* + * We claim the host here on drivers behalf for a couple + * reasons: + * + * 1) it is already needed to retrieve the CCCR_INTx; + * 2) we want the driver(s) to clear the IRQ condition ASAP; + * 3) we need to control the abort condition locally. + * + * Just like traditional hard IRQ handlers, we expect SDIO + * IRQ handlers to be quick and to the point, so that the + * holding of the host lock does not cover too much work + * that doesn't require that lock to be held. + */ + ret = __mmc_claim_host(host, &host->sdio_irq_thread_abort); + if (ret) + break; + ret = process_sdio_pending_irqs(host->card); + mmc_release_host(host); + + /* + * Give other threads a chance to run in the presence of + * errors. FIXME: determine if due to card removal and + * possibly exit this thread if so. + */ + if (ret < 0) + ssleep(1); + + /* + * Adaptive polling frequency based on the assumption + * that an interrupt will be closely followed by more. + * This has a substantial benefit for network devices. + */ + if (!(host->caps & MMC_CAP_SDIO_IRQ)) { + if (ret > 0) + period /= 2; + else { + period++; + if (period > idle_period) + period = idle_period; + } + } + + set_task_state(current, TASK_INTERRUPTIBLE); + if (host->caps & MMC_CAP_SDIO_IRQ) + host->ops->enable_sdio_irq(host, 1); + if (!kthread_should_stop()) + schedule_timeout(period); + set_task_state(current, TASK_RUNNING); + } while (!kthread_should_stop()); + + if (host->caps & MMC_CAP_SDIO_IRQ) + host->ops->enable_sdio_irq(host, 0); + + pr_debug("%s: IRQ thread exiting with code %d\n", + mmc_hostname(host), ret); + + return ret; +} + +static int sdio_card_irq_get(struct mmc_card *card) +{ + struct mmc_host *host = card->host; + + WARN_ON(!host->claimed); + + if (!host->sdio_irqs++) { + atomic_set(&host->sdio_irq_thread_abort, 0); + host->sdio_irq_thread = + kthread_run(sdio_irq_thread, host, "ksdiorqd"); + if (IS_ERR(host->sdio_irq_thread)) { + int err = PTR_ERR(host->sdio_irq_thread); + host->sdio_irqs--; + return err; + } + } + + return 0; +} + +static int sdio_card_irq_put(struct mmc_card *card) +{ + struct mmc_host *host = card->host; + + WARN_ON(!host->claimed); + BUG_ON(host->sdio_irqs < 1); + + if (!--host->sdio_irqs) { + atomic_set(&host->sdio_irq_thread_abort, 1); + kthread_stop(host->sdio_irq_thread); + } + + return 0; +} + +/** + * sdio_claim_irq - claim the IRQ for a SDIO function + * @func: SDIO function + * @handler: IRQ handler callback + * + * Claim and activate the IRQ for the given SDIO function. The provided + * handler will be called when that IRQ is asserted. The host is always + * claimed already when the handler is called so the handler must not + * call sdio_claim_host() nor sdio_release_host(). + */ +int sdio_claim_irq(struct sdio_func *func, sdio_irq_handler_t *handler) +{ + int ret; + unsigned char reg; + + BUG_ON(!func); + BUG_ON(!func->card); + + pr_debug("SDIO: Enabling IRQ for %s...\n", sdio_func_id(func)); + + if (func->irq_handler) { + pr_debug("SDIO: IRQ for %s already in use.\n", sdio_func_id(func)); + return -EBUSY; + } + + ret = mmc_io_rw_direct(func->card, 0, 0, SDIO_CCCR_IENx, 0, ®); + if (ret) + return ret; + + reg |= 1 << func->num; + + reg |= 1; /* Master interrupt enable */ + + ret = mmc_io_rw_direct(func->card, 1, 0, SDIO_CCCR_IENx, reg, NULL); + if (ret) + return ret; + + func->irq_handler = handler; + ret = sdio_card_irq_get(func->card); + if (ret) + func->irq_handler = NULL; + + return ret; +} +EXPORT_SYMBOL_GPL(sdio_claim_irq); + +/** + * sdio_release_irq - release the IRQ for a SDIO function + * @func: SDIO function + * + * Disable and release the IRQ for the given SDIO function. + */ +int sdio_release_irq(struct sdio_func *func) +{ + int ret; + unsigned char reg; + + BUG_ON(!func); + BUG_ON(!func->card); + + pr_debug("SDIO: Disabling IRQ for %s...\n", sdio_func_id(func)); + + if (func->irq_handler) { + func->irq_handler = NULL; + sdio_card_irq_put(func->card); + } + + ret = mmc_io_rw_direct(func->card, 0, 0, SDIO_CCCR_IENx, 0, ®); + if (ret) + return ret; + + reg &= ~(1 << func->num); + + /* Disable master interrupt with the last function interrupt */ + if (!(reg & 0xFE)) + reg = 0; + + ret = mmc_io_rw_direct(func->card, 1, 0, SDIO_CCCR_IENx, reg, NULL); + if (ret) + return ret; + + return 0; +} +EXPORT_SYMBOL_GPL(sdio_release_irq); + diff --git a/drivers/mmc/core/sdio_ops.c b/drivers/mmc/core/sdio_ops.c new file mode 100644 index 0000000..4d289b2 --- /dev/null +++ b/drivers/mmc/core/sdio_ops.c @@ -0,0 +1,176 @@ +/* + * linux/drivers/mmc/sdio_ops.c + * + * Copyright 2006-2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#include <asm/scatterlist.h> +#include <linux/scatterlist.h> + +#include <linux/mmc/host.h> +#include <linux/mmc/card.h> +#include <linux/mmc/mmc.h> +#include <linux/mmc/sdio.h> + +#include "core.h" + +int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) +{ + struct mmc_command cmd; + int i, err = 0; + + BUG_ON(!host); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = SD_IO_SEND_OP_COND; + cmd.arg = ocr; + cmd.flags = MMC_RSP_SPI_R4 | MMC_RSP_R4 | MMC_CMD_BCR; + + for (i = 100; i; i--) { + err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); + if (err) + break; + + /* if we're just probing, do a single pass */ + if (ocr == 0) + break; + + /* otherwise wait until reset completes */ + if (mmc_host_is_spi(host)) { + /* + * Both R1_SPI_IDLE and MMC_CARD_BUSY indicate + * an initialized card under SPI, but some cards + * (Marvell's) only behave when looking at this + * one. + */ + if (cmd.resp[1] & MMC_CARD_BUSY) + break; + } else { + if (cmd.resp[0] & MMC_CARD_BUSY) + break; + } + + err = -ETIMEDOUT; + + mmc_delay(10); + } + + if (rocr) + *rocr = cmd.resp[mmc_host_is_spi(host) ? 1 : 0]; + + return err; +} + +int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn, + unsigned addr, u8 in, u8* out) +{ + struct mmc_command cmd; + int err; + + BUG_ON(!card); + BUG_ON(fn > 7); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = SD_IO_RW_DIRECT; + cmd.arg = write ? 0x80000000 : 0x00000000; + cmd.arg |= fn << 28; + cmd.arg |= (write && out) ? 0x08000000 : 0x00000000; + cmd.arg |= addr << 9; + cmd.arg |= in; + cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC; + + err = mmc_wait_for_cmd(card->host, &cmd, 0); + if (err) + return err; + + if (mmc_host_is_spi(card->host)) { + /* host driver already reported errors */ + } else { + if (cmd.resp[0] & R5_ERROR) + return -EIO; + if (cmd.resp[0] & R5_FUNCTION_NUMBER) + return -EINVAL; + if (cmd.resp[0] & R5_OUT_OF_RANGE) + return -ERANGE; + } + + if (out) { + if (mmc_host_is_spi(card->host)) + *out = (cmd.resp[0] >> 8) & 0xFF; + else + *out = cmd.resp[0] & 0xFF; + } + + return 0; +} + +int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn, + unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz) +{ + struct mmc_request mrq; + struct mmc_command cmd; + struct mmc_data data; + struct scatterlist sg; + + BUG_ON(!card); + BUG_ON(fn > 7); + BUG_ON(blocks == 1 && blksz > 512); + WARN_ON(blocks == 0); + WARN_ON(blksz == 0); + + memset(&mrq, 0, sizeof(struct mmc_request)); + memset(&cmd, 0, sizeof(struct mmc_command)); + memset(&data, 0, sizeof(struct mmc_data)); + + mrq.cmd = &cmd; + mrq.data = &data; + + cmd.opcode = SD_IO_RW_EXTENDED; + cmd.arg = write ? 0x80000000 : 0x00000000; + cmd.arg |= fn << 28; + cmd.arg |= incr_addr ? 0x04000000 : 0x00000000; + cmd.arg |= addr << 9; + if (blocks == 1 && blksz <= 512) + cmd.arg |= (blksz == 512) ? 0 : blksz; /* byte mode */ + else + cmd.arg |= 0x08000000 | blocks; /* block mode */ + cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC; + + data.blksz = blksz; + data.blocks = blocks; + data.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ; + data.sg = &sg; + data.sg_len = 1; + + sg_init_one(&sg, buf, blksz * blocks); + + mmc_set_data_timeout(&data, card); + + mmc_wait_for_req(card->host, &mrq); + + if (cmd.error) + return cmd.error; + if (data.error) + return data.error; + + if (mmc_host_is_spi(card->host)) { + /* host driver already reported errors */ + } else { + if (cmd.resp[0] & R5_ERROR) + return -EIO; + if (cmd.resp[0] & R5_FUNCTION_NUMBER) + return -EINVAL; + if (cmd.resp[0] & R5_OUT_OF_RANGE) + return -ERANGE; + } + + return 0; +} + diff --git a/drivers/mmc/core/sdio_ops.h b/drivers/mmc/core/sdio_ops.h new file mode 100644 index 0000000..e2e74b0 --- /dev/null +++ b/drivers/mmc/core/sdio_ops.h @@ -0,0 +1,22 @@ +/* + * linux/drivers/mmc/sdio_ops.c + * + * Copyright 2006-2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#ifndef _MMC_SDIO_OPS_H +#define _MMC_SDIO_OPS_H + +int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr); +int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn, + unsigned addr, u8 in, u8* out); +int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn, + unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz); + +#endif + diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index e23082f..5fef678 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -35,6 +35,23 @@ config MMC_SDHCI If unsure, say N. +config MMC_RICOH_MMC + tristate "Ricoh MMC Controller Disabler (EXPERIMENTAL)" + depends on PCI && EXPERIMENTAL && MMC_SDHCI + help + This selects the disabler for the Ricoh MMC Controller. This + proprietary controller is unnecessary because the SDHCI driver + supports MMC cards on the SD controller, but if it is not + disabled, it will steal the MMC cards away - rendering them + useless. It is safe to select this driver even if you don't + have a Ricoh based card reader. + + + To compile this driver as a module, choose M here: + the module will be called ricoh_mmc. + + If unsure, say Y. + config MMC_OMAP tristate "TI OMAP Multimedia Card Interface support" depends on ARCH_OMAP @@ -100,3 +117,16 @@ config MMC_TIFM_SD To compile this driver as a module, choose M here: the module will be called tifm_sd. +config MMC_SPI + tristate "MMC/SD over SPI (EXPERIMENTAL)" + depends on MMC && SPI_MASTER && !HIGHMEM && EXPERIMENTAL + select CRC7 + select CRC_ITU_T + help + Some systems accss MMC/SD cards using a SPI controller instead of + using a "native" MMC/SD controller. This has a disadvantage of + being relatively high overhead, but a compensating advantage of + working on many systems without dedicated MMC/SD controllers. + + If unsure, or if your system has no SPI master driver, say N. + diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index 6685f64..3877c87 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile @@ -10,9 +10,11 @@ obj-$(CONFIG_MMC_ARMMMCI) += mmci.o obj-$(CONFIG_MMC_PXA) += pxamci.o obj-$(CONFIG_MMC_IMX) += imxmmc.o obj-$(CONFIG_MMC_SDHCI) += sdhci.o +obj-$(CONFIG_MMC_RICOH_MMC) += ricoh_mmc.o obj-$(CONFIG_MMC_WBSD) += wbsd.o obj-$(CONFIG_MMC_AU1X) += au1xmmc.o obj-$(CONFIG_MMC_OMAP) += omap.o obj-$(CONFIG_MMC_AT91) += at91_mci.o obj-$(CONFIG_MMC_TIFM_SD) += tifm_sd.o +obj-$(CONFIG_MMC_SPI) += mmc_spi.o diff --git a/drivers/mmc/host/at91_mci.c b/drivers/mmc/host/at91_mci.c index 955ea60..6ba98a4 100644 --- a/drivers/mmc/host/at91_mci.c +++ b/drivers/mmc/host/at91_mci.c @@ -328,7 +328,7 @@ static void at91_mci_handle_transmitted(struct at91mci_host *host) data = cmd->data; if (!data) return; - if (cmd->data->flags & MMC_DATA_MULTI) { + if (cmd->data->blocks > 1) { pr_debug("multiple write : wait for BLKE...\n"); at91_mci_write(host, AT91_MCI_IER, AT91_MCI_BLKE); } else @@ -428,6 +428,14 @@ static void at91_mci_send_command(struct at91mci_host *host, struct mmc_command } if (data) { + + if ( data->blksz & 0x3 ) { + pr_debug("Unsupported block size\n"); + cmd->error = -EINVAL; + mmc_request_done(host->mmc, host->request); + return; + } + block_length = data->blksz; blocks = data->blocks; @@ -439,7 +447,7 @@ static void at91_mci_send_command(struct at91mci_host *host, struct mmc_command if (data->flags & MMC_DATA_STREAM) cmdr |= AT91_MCI_TRTYP_STREAM; - if (data->flags & MMC_DATA_MULTI) + if (data->blocks > 1) cmdr |= AT91_MCI_TRTYP_MULTIPLE; } else { @@ -577,24 +585,22 @@ static void at91_mci_completed_command(struct at91mci_host *host) AT91_MCI_RENDE | AT91_MCI_RTOE | AT91_MCI_DCRCE | AT91_MCI_DTOE | AT91_MCI_OVRE | AT91_MCI_UNRE)) { if ((status & AT91_MCI_RCRCE) && !(mmc_resp_type(cmd) & MMC_RSP_CRC)) { - cmd->error = MMC_ERR_NONE; + cmd->error = 0; } else { if (status & (AT91_MCI_RTOE | AT91_MCI_DTOE)) - cmd->error = MMC_ERR_TIMEOUT; + cmd->error = -ETIMEDOUT; else if (status & (AT91_MCI_RCRCE | AT91_MCI_DCRCE)) - cmd->error = MMC_ERR_BADCRC; - else if (status & (AT91_MCI_OVRE | AT91_MCI_UNRE)) - cmd->error = MMC_ERR_FIFO; + cmd->error = -EILSEQ; else - cmd->error = MMC_ERR_FAILED; + cmd->error = -EIO; pr_debug("Error detected and set to %d (cmd = %d, retries = %d)\n", cmd->error, cmd->opcode, cmd->retries); } } else - cmd->error = MMC_ERR_NONE; + cmd->error = 0; at91_mci_process_next(host); } @@ -836,7 +842,6 @@ static int __init at91_mci_probe(struct platform_device *pdev) mmc->f_min = 375000; mmc->f_max = 25000000; mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; - mmc->caps = MMC_CAP_BYTEBLOCK; mmc->max_blk_size = 4095; mmc->max_blk_count = mmc->max_req_size; diff --git a/drivers/mmc/host/au1xmmc.c b/drivers/mmc/host/au1xmmc.c index 34c99d4..92c4d0d 100644 --- a/drivers/mmc/host/au1xmmc.c +++ b/drivers/mmc/host/au1xmmc.c @@ -186,7 +186,7 @@ static void au1xmmc_tasklet_finish(unsigned long param) } static int au1xmmc_send_command(struct au1xmmc_host *host, int wait, - struct mmc_command *cmd, unsigned int flags) + struct mmc_command *cmd, struct mmc_data *data) { u32 mmccmd = (cmd->opcode << SD_CMD_CI_SHIFT); @@ -208,19 +208,21 @@ static int au1xmmc_send_command(struct au1xmmc_host *host, int wait, default: printk(KERN_INFO "au1xmmc: unhandled response type %02x\n", mmc_resp_type(cmd)); - return MMC_ERR_INVALID; + return -EINVAL; } - if (flags & MMC_DATA_READ) { - if (flags & MMC_DATA_MULTI) - mmccmd |= SD_CMD_CT_4; - else - mmccmd |= SD_CMD_CT_2; - } else if (flags & MMC_DATA_WRITE) { - if (flags & MMC_DATA_MULTI) - mmccmd |= SD_CMD_CT_3; - else - mmccmd |= SD_CMD_CT_1; + if (data) { + if (flags & MMC_DATA_READ) { + if (data->blocks > 1) + mmccmd |= SD_CMD_CT_4; + else + mmccmd |= SD_CMD_CT_2; + } else if (flags & MMC_DATA_WRITE) { + if (data->blocks > 1) + mmccmd |= SD_CMD_CT_3; + else + mmccmd |= SD_CMD_CT_1; + } } au_writel(cmd->arg, HOST_CMDARG(host)); @@ -253,7 +255,7 @@ static int au1xmmc_send_command(struct au1xmmc_host *host, int wait, IRQ_ON(host, SD_CONFIG_CR); } - return MMC_ERR_NONE; + return 0; } static void au1xmmc_data_complete(struct au1xmmc_host *host, u32 status) @@ -278,7 +280,7 @@ static void au1xmmc_data_complete(struct au1xmmc_host *host, u32 status) while((host->flags & HOST_F_XMIT) && (status & SD_STATUS_DB)) status = au_readl(HOST_STATUS(host)); - data->error = MMC_ERR_NONE; + data->error = 0; dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len, host->dma.dir); /* Process any errors */ @@ -288,14 +290,14 @@ static void au1xmmc_data_complete(struct au1xmmc_host *host, u32 status) crc |= ((status & 0x07) == 0x02) ? 0 : 1; if (crc) - data->error = MMC_ERR_BADCRC; + data->error = -EILSEQ; /* Clear the CRC bits */ au_writel(SD_STATUS_WC | SD_STATUS_RC, HOST_STATUS(host)); data->bytes_xfered = 0; - if (data->error == MMC_ERR_NONE) { + if (!data->error) { if (host->flags & HOST_F_DMA) { u32 chan = DMA_CHANNEL(host); @@ -475,7 +477,7 @@ static void au1xmmc_cmd_complete(struct au1xmmc_host *host, u32 status) return; cmd = mrq->cmd; - cmd->error = MMC_ERR_NONE; + cmd->error = 0; if (cmd->flags & MMC_RSP_PRESENT) { if (cmd->flags & MMC_RSP_136) { @@ -512,11 +514,11 @@ static void au1xmmc_cmd_complete(struct au1xmmc_host *host, u32 status) /* Figure out errors */ if (status & (SD_STATUS_SC | SD_STATUS_WC | SD_STATUS_RC)) - cmd->error = MMC_ERR_BADCRC; + cmd->error = -EILSEQ; trans = host->flags & (HOST_F_XMIT | HOST_F_RECV); - if (!trans || cmd->error != MMC_ERR_NONE) { + if (!trans || cmd->error) { IRQ_OFF(host, SD_CONFIG_TH | SD_CONFIG_RA|SD_CONFIG_RF); tasklet_schedule(&host->finish_task); @@ -589,7 +591,7 @@ au1xmmc_prepare_data(struct au1xmmc_host *host, struct mmc_data *data) data->sg_len, host->dma.dir); if (host->dma.len == 0) - return MMC_ERR_TIMEOUT; + return -ETIMEDOUT; au_writel(data->blksz - 1, HOST_BLKSIZE(host)); @@ -640,11 +642,11 @@ au1xmmc_prepare_data(struct au1xmmc_host *host, struct mmc_data *data) //IRQ_ON(host, SD_CONFIG_RA|SD_CONFIG_RF); } - return MMC_ERR_NONE; + return 0; dataerr: dma_unmap_sg(mmc_dev(host->mmc),data->sg,data->sg_len,host->dma.dir); - return MMC_ERR_TIMEOUT; + return -ETIMEDOUT; } /* static void au1xmmc_request @@ -656,7 +658,7 @@ static void au1xmmc_request(struct mmc_host* mmc, struct mmc_request* mrq) struct au1xmmc_host *host = mmc_priv(mmc); unsigned int flags = 0; - int ret = MMC_ERR_NONE; + int ret = 0; WARN_ON(irqs_disabled()); WARN_ON(host->status != HOST_S_IDLE); @@ -672,10 +674,10 @@ static void au1xmmc_request(struct mmc_host* mmc, struct mmc_request* mrq) ret = au1xmmc_prepare_data(host, mrq->data); } - if (ret == MMC_ERR_NONE) - ret = au1xmmc_send_command(host, 0, mrq->cmd, flags); + if (!ret) + ret = au1xmmc_send_command(host, 0, mrq->cmd, mrq->data); - if (ret != MMC_ERR_NONE) { + if (ret) { mrq->cmd->error = ret; au1xmmc_finish_request(host); } @@ -764,10 +766,10 @@ static irqreturn_t au1xmmc_irq(int irq, void *dev_id) if (host->mrq && (status & STATUS_TIMEOUT)) { if (status & SD_STATUS_RAT) - host->mrq->cmd->error = MMC_ERR_TIMEOUT; + host->mrq->cmd->error = -ETIMEDOUT; else if (status & SD_STATUS_DT) - host->mrq->data->error = MMC_ERR_TIMEOUT; + host->mrq->data->error = -ETIMEDOUT; /* In PIO mode, interrupts might still be enabled */ IRQ_OFF(host, SD_CONFIG_NE | SD_CONFIG_TH); diff --git a/drivers/mmc/host/imxmmc.c b/drivers/mmc/host/imxmmc.c index 54bfc9f..6ebc41e 100644 --- a/drivers/mmc/host/imxmmc.c +++ b/drivers/mmc/host/imxmmc.c @@ -428,11 +428,11 @@ static int imxmci_finish_data(struct imxmci_host *host, unsigned int stat) if ( stat & STATUS_ERR_MASK ) { dev_dbg(mmc_dev(host->mmc), "request failed. status: 0x%08x\n",stat); if(stat & (STATUS_CRC_READ_ERR | STATUS_CRC_WRITE_ERR)) - data->error = MMC_ERR_BADCRC; + data->error = -EILSEQ; else if(stat & STATUS_TIME_OUT_READ) - data->error = MMC_ERR_TIMEOUT; + data->error = -ETIMEDOUT; else - data->error = MMC_ERR_FAILED; + data->error = -EIO; } else { data->bytes_xfered = host->dma_size; } @@ -458,10 +458,10 @@ static int imxmci_cmd_done(struct imxmci_host *host, unsigned int stat) if (stat & STATUS_TIME_OUT_RESP) { dev_dbg(mmc_dev(host->mmc), "CMD TIMEOUT\n"); - cmd->error = MMC_ERR_TIMEOUT; + cmd->error = -ETIMEDOUT; } else if (stat & STATUS_RESP_CRC_ERR && cmd->flags & MMC_RSP_CRC) { dev_dbg(mmc_dev(host->mmc), "cmd crc error\n"); - cmd->error = MMC_ERR_BADCRC; + cmd->error = -EILSEQ; } if(cmd->flags & MMC_RSP_PRESENT) { @@ -482,7 +482,7 @@ static int imxmci_cmd_done(struct imxmci_host *host, unsigned int stat) dev_dbg(mmc_dev(host->mmc), "RESP 0x%08x, 0x%08x, 0x%08x, 0x%08x, error %d\n", cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3], cmd->error); - if (data && (cmd->error == MMC_ERR_NONE) && !(stat & STATUS_ERR_MASK)) { + if (data && !cmd->error && !(stat & STATUS_ERR_MASK)) { if (host->req->data->flags & MMC_DATA_WRITE) { /* Wait for FIFO to be empty before starting DMA write */ @@ -491,7 +491,7 @@ static int imxmci_cmd_done(struct imxmci_host *host, unsigned int stat) if(imxmci_busy_wait_for_status(host, &stat, STATUS_APPL_BUFF_FE, 40, "imxmci_cmd_done DMA WR") < 0) { - cmd->error = MMC_ERR_FIFO; + cmd->error = -EIO; imxmci_finish_data(host, stat); if(host->req) imxmci_finish_request(host, host->req); @@ -884,9 +884,21 @@ static void imxmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) } } +static int imxmci_get_ro(struct mmc_host *mmc) +{ + struct imxmci_host *host = mmc_priv(mmc); + + if (host->pdata && host->pdata->get_ro) + return host->pdata->get_ro(mmc_dev(mmc)); + /* Host doesn't support read only detection so assume writeable */ + return 0; +} + + static const struct mmc_host_ops imxmci_ops = { .request = imxmci_request, .set_ios = imxmci_set_ios, + .get_ro = imxmci_get_ro, }; static struct resource *platform_device_resource(struct platform_device *dev, unsigned int mask, int nr) @@ -913,7 +925,7 @@ static void imxmci_check_status(unsigned long data) { struct imxmci_host *host = (struct imxmci_host *)data; - if( host->pdata->card_present() != host->present ) { + if( host->pdata->card_present(mmc_dev(host->mmc)) != host->present ) { host->present ^= 1; dev_info(mmc_dev(host->mmc), "card %s\n", host->present ? "inserted" : "removed"); @@ -963,7 +975,7 @@ static int imxmci_probe(struct platform_device *pdev) mmc->f_min = 150000; mmc->f_max = CLK_RATE/2; mmc->ocr_avail = MMC_VDD_32_33; - mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_BYTEBLOCK; + mmc->caps = MMC_CAP_4_BIT_DATA; /* MMC core transfer sizes tunable parameters */ mmc->max_hw_segs = 64; @@ -1022,7 +1034,7 @@ static int imxmci_probe(struct platform_device *pdev) if (ret) goto out; - host->present = host->pdata->card_present(); + host->present = host->pdata->card_present(mmc_dev(mmc)); init_timer(&host->timer); host->timer.data = (unsigned long)host; host->timer.function = imxmci_check_status; diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c new file mode 100644 index 0000000..f30327b --- /dev/null +++ b/drivers/mmc/host/mmc_spi.c @@ -0,0 +1,1408 @@ +/* + * mmc_spi.c - Access SD/MMC cards through SPI master controllers + * + * (C) Copyright 2005, Intec Automation, + * Mike Lavender (mike@steroidmicros) + * (C) Copyright 2006-2007, David Brownell + * (C) Copyright 2007, Axis Communications, + * Hans-Peter Nilsson (hp@axis.com) + * (C) Copyright 2007, ATRON electronic GmbH, + * Jan Nikitenko <jan.nikitenko@gmail.com> + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include <linux/hrtimer.h> +#include <linux/delay.h> +#include <linux/blkdev.h> +#include <linux/dma-mapping.h> +#include <linux/crc7.h> +#include <linux/crc-itu-t.h> + +#include <linux/mmc/host.h> +#include <linux/mmc/mmc.h> /* for R1_SPI_* bit values */ + +#include <linux/spi/spi.h> +#include <linux/spi/mmc_spi.h> + +#include <asm/unaligned.h> + + +/* NOTES: + * + * - For now, we won't try to interoperate with a real mmc/sd/sdio + * controller, although some of them do have hardware support for + * SPI protocol. The main reason for such configs would be mmc-ish + * cards like DataFlash, which don't support that "native" protocol. + * + * We don't have a "DataFlash/MMC/SD/SDIO card slot" abstraction to + * switch between driver stacks, and in any case if "native" mode + * is available, it will be faster and hence preferable. + * + * - MMC depends on a different chipselect management policy than the + * SPI interface currently supports for shared bus segments: it needs + * to issue multiple spi_message requests with the chipselect active, + * using the results of one message to decide the next one to issue. + * + * Pending updates to the programming interface, this driver expects + * that it not share the bus with other drivers (precluding conflicts). + * + * - We tell the controller to keep the chipselect active from the + * beginning of an mmc_host_ops.request until the end. So beware + * of SPI controller drivers that mis-handle the cs_change flag! + * + * However, many cards seem OK with chipselect flapping up/down + * during that time ... at least on unshared bus segments. + */ + + +/* + * Local protocol constants, internal to data block protocols. + */ + +/* Response tokens used to ack each block written: */ +#define SPI_MMC_RESPONSE_CODE(x) ((x) & 0x1f) +#define SPI_RESPONSE_ACCEPTED ((2 << 1)|1) +#define SPI_RESPONSE_CRC_ERR ((5 << 1)|1) +#define SPI_RESPONSE_WRITE_ERR ((6 << 1)|1) + +/* Read and write blocks start with these tokens and end with crc; + * on error, read tokens act like a subset of R2_SPI_* values. + */ +#define SPI_TOKEN_SINGLE 0xfe /* single block r/w, multiblock read */ +#define SPI_TOKEN_MULTI_WRITE 0xfc /* multiblock write */ +#define SPI_TOKEN_STOP_TRAN 0xfd /* terminate multiblock write */ + +#define MMC_SPI_BLOCKSIZE 512 + + +/* These fixed timeouts come from the latest SD specs, which say to ignore + * the CSD values. The R1B value is for card erase (e.g. the "I forgot the + * card's password" scenario); it's mostly applied to STOP_TRANSMISSION after + * reads which takes nowhere near that long. Older cards may be able to use + * shorter timeouts ... but why bother? + */ +#define readblock_timeout ktime_set(0, 100 * 1000 * 1000) +#define writeblock_timeout ktime_set(0, 250 * 1000 * 1000) +#define r1b_timeout ktime_set(3, 0) + + +/****************************************************************************/ + +/* + * Local Data Structures + */ + +/* "scratch" is per-{command,block} data exchanged with the card */ +struct scratch { + u8 status[29]; + u8 data_token; + __be16 crc_val; +}; + +struct mmc_spi_host { + struct mmc_host *mmc; + struct spi_device *spi; + + unsigned char power_mode; + u16 powerup_msecs; + + struct mmc_spi_platform_data *pdata; + + /* for bulk data transfers */ + struct spi_transfer token, t, crc, early_status; + struct spi_message m; + + /* for status readback */ + struct spi_transfer status; + struct spi_message readback; + + /* underlying DMA-aware controller, or null */ + struct device *dma_dev; + + /* buffer used for commands and for message "overhead" */ + struct scratch *data; + dma_addr_t data_dma; + + /* Specs say to write ones most of the time, even when the card + * has no need to read its input data; and many cards won't care. + * This is our source of those ones. + */ + void *ones; + dma_addr_t ones_dma; +}; + + +/****************************************************************************/ + +/* + * MMC-over-SPI protocol glue, used by the MMC stack interface + */ + +static inline int mmc_cs_off(struct mmc_spi_host *host) +{ + /* chipselect will always be inactive after setup() */ + return spi_setup(host->spi); +} + +static int +mmc_spi_readbytes(struct mmc_spi_host *host, unsigned len) +{ + int status; + + if (len > sizeof(*host->data)) { + WARN_ON(1); + return -EIO; + } + + host->status.len = len; + + if (host->dma_dev) + dma_sync_single_for_device(host->dma_dev, + host->data_dma, sizeof(*host->data), + DMA_FROM_DEVICE); + + status = spi_sync(host->spi, &host->readback); + if (status == 0) + status = host->readback.status; + + if (host->dma_dev) + dma_sync_single_for_cpu(host->dma_dev, + host->data_dma, sizeof(*host->data), + DMA_FROM_DEVICE); + + return status; +} + +static int +mmc_spi_skip(struct mmc_spi_host *host, ktime_t timeout, unsigned n, u8 byte) +{ + u8 *cp = host->data->status; + + timeout = ktime_add(timeout, ktime_get()); + + while (1) { + int status; + unsigned i; + + status = mmc_spi_readbytes(host, n); + if (status < 0) + return status; + + for (i = 0; i < n; i++) { + if (cp[i] != byte) + return cp[i]; + } + + /* REVISIT investigate msleep() to avoid busy-wait I/O + * in at least some cases. + */ + if (ktime_to_ns(ktime_sub(ktime_get(), timeout)) > 0) + break; + } + return -ETIMEDOUT; +} + +static inline int +mmc_spi_wait_unbusy(struct mmc_spi_host *host, ktime_t timeout) +{ + return mmc_spi_skip(host, timeout, sizeof(host->data->status), 0); +} + +static int mmc_spi_readtoken(struct mmc_spi_host *host) +{ + return mmc_spi_skip(host, readblock_timeout, 1, 0xff); +} + + +/* + * Note that for SPI, cmd->resp[0] is not the same data as "native" protocol + * hosts return! The low byte holds R1_SPI bits. The next byte may hold + * R2_SPI bits ... for SEND_STATUS, or after data read errors. + * + * cmd->resp[1] holds any four-byte response, for R3 (READ_OCR) and on + * newer cards R7 (IF_COND). + */ + +static char *maptype(struct mmc_command *cmd) +{ + switch (mmc_spi_resp_type(cmd)) { + case MMC_RSP_SPI_R1: return "R1"; + case MMC_RSP_SPI_R1B: return "R1B"; + case MMC_RSP_SPI_R2: return "R2/R5"; + case MMC_RSP_SPI_R3: return "R3/R4/R7"; + default: return "?"; + } +} + +/* return zero, else negative errno after setting cmd->error */ +static int mmc_spi_response_get(struct mmc_spi_host *host, + struct mmc_command *cmd, int cs_on) +{ + u8 *cp = host->data->status; + u8 *end = cp + host->t.len; + int value = 0; + char tag[32]; + + snprintf(tag, sizeof(tag), " ... CMD%d response SPI_%s", + cmd->opcode, maptype(cmd)); + + /* Except for data block reads, the whole response will already + * be stored in the scratch buffer. It's somewhere after the + * command and the first byte we read after it. We ignore that + * first byte. After STOP_TRANSMISSION command it may include + * two data bits, but otherwise it's all ones. + */ + cp += 8; + while (cp < end && *cp == 0xff) + cp++; + + /* Data block reads (R1 response types) may need more data... */ + if (cp == end) { + unsigned i; + + cp = host->data->status; + + /* Card sends N(CR) (== 1..8) bytes of all-ones then one + * status byte ... and we already scanned 2 bytes. + * + * REVISIT block read paths use nasty byte-at-a-time I/O + * so it can always DMA directly into the target buffer. + * It'd probably be better to memcpy() the first chunk and + * avoid extra i/o calls... + */ + for (i = 2; i < 9; i++) { + value = mmc_spi_readbytes(host, 1); + if (value < 0) + goto done; + if (*cp != 0xff) + goto checkstatus; + } + value = -ETIMEDOUT; + goto done; + } + +checkstatus: + if (*cp & 0x80) { + dev_dbg(&host->spi->dev, "%s: INVALID RESPONSE, %02x\n", + tag, *cp); + value = -EBADR; + goto done; + } + + cmd->resp[0] = *cp++; + cmd->error = 0; + + /* Status byte: the entire seven-bit R1 response. */ + if (cmd->resp[0] != 0) { + if ((R1_SPI_PARAMETER | R1_SPI_ADDRESS + | R1_SPI_ILLEGAL_COMMAND) + & cmd->resp[0]) + value = -EINVAL; + else if (R1_SPI_COM_CRC & cmd->resp[0]) + value = -EILSEQ; + else if ((R1_SPI_ERASE_SEQ | R1_SPI_ERASE_RESET) + & cmd->resp[0]) + value = -EIO; + /* else R1_SPI_IDLE, "it's resetting" */ + } + + switch (mmc_spi_resp_type(cmd)) { + + /* SPI R1B == R1 + busy; STOP_TRANSMISSION (for multiblock reads) + * and less-common stuff like various erase operations. + */ + case MMC_RSP_SPI_R1B: + /* maybe we read all the busy tokens already */ + while (cp < end && *cp == 0) + cp++; + if (cp == end) + mmc_spi_wait_unbusy(host, r1b_timeout); + break; + + /* SPI R2 == R1 + second status byte; SEND_STATUS + * SPI R5 == R1 + data byte; IO_RW_DIRECT + */ + case MMC_RSP_SPI_R2: + cmd->resp[0] |= *cp << 8; + break; + + /* SPI R3, R4, or R7 == R1 + 4 bytes */ + case MMC_RSP_SPI_R3: + cmd->resp[1] = be32_to_cpu(get_unaligned((u32 *)cp)); + break; + + /* SPI R1 == just one status byte */ + case MMC_RSP_SPI_R1: + break; + + default: + dev_dbg(&host->spi->dev, "bad response type %04x\n", + mmc_spi_resp_type(cmd)); + if (value >= 0) + value = -EINVAL; + goto done; + } + + if (value < 0) + dev_dbg(&host->spi->dev, "%s: resp %04x %08x\n", + tag, cmd->resp[0], cmd->resp[1]); + + /* disable chipselect on errors and some success cases */ + if (value >= 0 && cs_on) + return value; +done: + if (value < 0) + cmd->error = value; + mmc_cs_off(host); + return value; +} + +/* Issue command and read its response. + * Returns zero on success, negative for error. + * + * On error, caller must cope with mmc core retry mechanism. That + * means immediate low-level resubmit, which affects the bus lock... + */ +static int +mmc_spi_command_send(struct mmc_spi_host *host, + struct mmc_request *mrq, + struct mmc_command *cmd, int cs_on) +{ + struct scratch *data = host->data; + u8 *cp = data->status; + u32 arg = cmd->arg; + int status; + struct spi_transfer *t; + + /* We can handle most commands (except block reads) in one full + * duplex I/O operation before either starting the next transfer + * (data block or command) or else deselecting the card. + * + * First, write 7 bytes: + * - an all-ones byte to ensure the card is ready + * - opcode byte (plus start and transmission bits) + * - four bytes of big-endian argument + * - crc7 (plus end bit) ... always computed, it's cheap + * + * We init the whole buffer to all-ones, which is what we need + * to write while we're reading (later) response data. + */ + memset(cp++, 0xff, sizeof(data->status)); + + *cp++ = 0x40 | cmd->opcode; + *cp++ = (u8)(arg >> 24); + *cp++ = (u8)(arg >> 16); + *cp++ = (u8)(arg >> 8); + *cp++ = (u8)arg; + *cp++ = (crc7(0, &data->status[1], 5) << 1) | 0x01; + + /* Then, read up to 13 bytes (while writing all-ones): + * - N(CR) (== 1..8) bytes of all-ones + * - status byte (for all response types) + * - the rest of the response, either: + * + nothing, for R1 or R1B responses + * + second status byte, for R2 responses + * + four data bytes, for R3 and R7 responses + * + * Finally, read some more bytes ... in the nice cases we know in + * advance how many, and reading 1 more is always OK: + * - N(EC) (== 0..N) bytes of all-ones, before deselect/finish + * - N(RC) (== 1..N) bytes of all-ones, before next command + * - N(WR) (== 1..N) bytes of all-ones, before data write + * + * So in those cases one full duplex I/O of at most 21 bytes will + * handle the whole command, leaving the card ready to receive a + * data block or new command. We do that whenever we can, shaving + * CPU and IRQ costs (especially when using DMA or FIFOs). + * + * There are two other cases, where it's not generally practical + * to rely on a single I/O: + * + * - R1B responses need at least N(EC) bytes of all-zeroes. + * + * In this case we can *try* to fit it into one I/O, then + * maybe read more data later. + * + * - Data block reads are more troublesome, since a variable + * number of padding bytes precede the token and data. + * + N(CX) (== 0..8) bytes of all-ones, before CSD or CID + * + N(AC) (== 1..many) bytes of all-ones + * + * In this case we currently only have minimal speedups here: + * when N(CR) == 1 we can avoid I/O in response_get(). + */ + if (cs_on && (mrq->data->flags & MMC_DATA_READ)) { + cp += 2; /* min(N(CR)) + status */ + /* R1 */ + } else { + cp += 10; /* max(N(CR)) + status + min(N(RC),N(WR)) */ + if (cmd->flags & MMC_RSP_SPI_S2) /* R2/R5 */ + cp++; + else if (cmd->flags & MMC_RSP_SPI_B4) /* R3/R4/R7 */ + cp += 4; + else if (cmd->flags & MMC_RSP_BUSY) /* R1B */ + cp = data->status + sizeof(data->status); + /* else: R1 (most commands) */ + } + + dev_dbg(&host->spi->dev, " mmc_spi: CMD%d, resp %s\n", + cmd->opcode, maptype(cmd)); + + /* send command, leaving chipselect active */ + spi_message_init(&host->m); + + t = &host->t; + memset(t, 0, sizeof(*t)); + t->tx_buf = t->rx_buf = data->status; + t->tx_dma = t->rx_dma = host->data_dma; + t->len = cp - data->status; + t->cs_change = 1; + spi_message_add_tail(t, &host->m); + + if (host->dma_dev) { + host->m.is_dma_mapped = 1; + dma_sync_single_for_device(host->dma_dev, + host->data_dma, sizeof(*host->data), + DMA_BIDIRECTIONAL); + } + status = spi_sync(host->spi, &host->m); + if (status == 0) + status = host->m.status; + + if (host->dma_dev) + dma_sync_single_for_cpu(host->dma_dev, + host->data_dma, sizeof(*host->data), + DMA_BIDIRECTIONAL); + if (status < 0) { + dev_dbg(&host->spi->dev, " ... write returned %d\n", status); + cmd->error = status; + return status; + } + + /* after no-data commands and STOP_TRANSMISSION, chipselect off */ + return mmc_spi_response_get(host, cmd, cs_on); +} + +/* Build data message with up to four separate transfers. For TX, we + * start by writing the data token. And in most cases, we finish with + * a status transfer. + * + * We always provide TX data for data and CRC. The MMC/SD protocol + * requires us to write ones; but Linux defaults to writing zeroes; + * so we explicitly initialize it to all ones on RX paths. + * + * We also handle DMA mapping, so the underlying SPI controller does + * not need to (re)do it for each message. + */ +static void +mmc_spi_setup_data_message( + struct mmc_spi_host *host, + int multiple, + enum dma_data_direction direction) +{ + struct spi_transfer *t; + struct scratch *scratch = host->data; + dma_addr_t dma = host->data_dma; + + spi_message_init(&host->m); + if (dma) + host->m.is_dma_mapped = 1; + + /* for reads, readblock() skips 0xff bytes before finding + * the token; for writes, this transfer issues that token. + */ + if (direction == DMA_TO_DEVICE) { + t = &host->token; + memset(t, 0, sizeof(*t)); + t->len = 1; + if (multiple) + scratch->data_token = SPI_TOKEN_MULTI_WRITE; + else + scratch->data_token = SPI_TOKEN_SINGLE; + t->tx_buf = &scratch->data_token; + if (dma) + t->tx_dma = dma + offsetof(struct scratch, data_token); + spi_message_add_tail(t, &host->m); + } + + /* Body of transfer is buffer, then CRC ... + * either TX-only, or RX with TX-ones. + */ + t = &host->t; + memset(t, 0, sizeof(*t)); + t->tx_buf = host->ones; + t->tx_dma = host->ones_dma; + /* length and actual buffer info are written later */ + spi_message_add_tail(t, &host->m); + + t = &host->crc; + memset(t, 0, sizeof(*t)); + t->len = 2; + if (direction == DMA_TO_DEVICE) { + /* the actual CRC may get written later */ + t->tx_buf = &scratch->crc_val; + if (dma) + t->tx_dma = dma + offsetof(struct scratch, crc_val); + } else { + t->tx_buf = host->ones; + t->tx_dma = host->ones_dma; + t->rx_buf = &scratch->crc_val; + if (dma) + t->rx_dma = dma + offsetof(struct scratch, crc_val); + } + spi_message_add_tail(t, &host->m); + + /* + * A single block read is followed by N(EC) [0+] all-ones bytes + * before deselect ... don't bother. + * + * Multiblock reads are followed by N(AC) [1+] all-ones bytes before + * the next block is read, or a STOP_TRANSMISSION is issued. We'll + * collect that single byte, so readblock() doesn't need to. + * + * For a write, the one-byte data response follows immediately, then + * come zero or more busy bytes, then N(WR) [1+] all-ones bytes. + * Then single block reads may deselect, and multiblock ones issue + * the next token (next data block, or STOP_TRAN). We can try to + * minimize I/O ops by using a single read to collect end-of-busy. + */ + if (multiple || direction == DMA_TO_DEVICE) { + t = &host->early_status; + memset(t, 0, sizeof(*t)); + t->len = (direction == DMA_TO_DEVICE) + ? sizeof(scratch->status) + : 1; + t->tx_buf = host->ones; + t->tx_dma = host->ones_dma; + t->rx_buf = scratch->status; + if (dma) + t->rx_dma = dma + offsetof(struct scratch, status); + t->cs_change = 1; + spi_message_add_tail(t, &host->m); + } +} + +/* + * Write one block: + * - caller handled preceding N(WR) [1+] all-ones bytes + * - data block + * + token + * + data bytes + * + crc16 + * - an all-ones byte ... card writes a data-response byte + * - followed by N(EC) [0+] all-ones bytes, card writes zero/'busy' + * + * Return negative errno, else success. + */ +static int +mmc_spi_writeblock(struct mmc_spi_host *host, struct spi_transfer *t) +{ + struct spi_device *spi = host->spi; + int status, i; + struct scratch *scratch = host->data; + + if (host->mmc->use_spi_crc) + scratch->crc_val = cpu_to_be16( + crc_itu_t(0, t->tx_buf, t->len)); + if (host->dma_dev) + dma_sync_single_for_device(host->dma_dev, + host->data_dma, sizeof(*scratch), + DMA_BIDIRECTIONAL); + + status = spi_sync(spi, &host->m); + if (status == 0) + status = host->m.status; + + if (status != 0) { + dev_dbg(&spi->dev, "write error (%d)\n", status); + return status; + } + + if (host->dma_dev) + dma_sync_single_for_cpu(host->dma_dev, + host->data_dma, sizeof(*scratch), + DMA_BIDIRECTIONAL); + + /* + * Get the transmission data-response reply. It must follow + * immediately after the data block we transferred. This reply + * doesn't necessarily tell whether the write operation succeeded; + * it just says if the transmission was ok and whether *earlier* + * writes succeeded; see the standard. + */ + switch (SPI_MMC_RESPONSE_CODE(scratch->status[0])) { + case SPI_RESPONSE_ACCEPTED: + status = 0; + break; + case SPI_RESPONSE_CRC_ERR: + /* host shall then issue MMC_STOP_TRANSMISSION */ + status = -EILSEQ; + break; + case SPI_RESPONSE_WRITE_ERR: + /* host shall then issue MMC_STOP_TRANSMISSION, + * and should MMC_SEND_STATUS to sort it out + */ + status = -EIO; + break; + default: + status = -EPROTO; + break; + } + if (status != 0) { + dev_dbg(&spi->dev, "write error %02x (%d)\n", + scratch->status[0], status); + return status; + } + + t->tx_buf += t->len; + if (host->dma_dev) + t->tx_dma += t->len; + + /* Return when not busy. If we didn't collect that status yet, + * we'll need some more I/O. + */ + for (i = 1; i < sizeof(scratch->status); i++) { + if (scratch->status[i] != 0) + return 0; + } + return mmc_spi_wait_unbusy(host, writeblock_timeout); +} + +/* + * Read one block: + * - skip leading all-ones bytes ... either + * + N(AC) [1..f(clock,CSD)] usually, else + * + N(CX) [0..8] when reading CSD or CID + * - data block + * + token ... if error token, no data or crc + * + data bytes + * + crc16 + * + * After single block reads, we're done; N(EC) [0+] all-ones bytes follow + * before dropping chipselect. + * + * For multiblock reads, caller either reads the next block or issues a + * STOP_TRANSMISSION command. + */ +static int +mmc_spi_readblock(struct mmc_spi_host *host, struct spi_transfer *t) +{ + struct spi_device *spi = host->spi; + int status; + struct scratch *scratch = host->data; + + /* At least one SD card sends an all-zeroes byte when N(CX) + * applies, before the all-ones bytes ... just cope with that. + */ + status = mmc_spi_readbytes(host, 1); + if (status < 0) + return status; + status = scratch->status[0]; + if (status == 0xff || status == 0) + status = mmc_spi_readtoken(host); + + if (status == SPI_TOKEN_SINGLE) { + if (host->dma_dev) { + dma_sync_single_for_device(host->dma_dev, + host->data_dma, sizeof(*scratch), + DMA_BIDIRECTIONAL); + dma_sync_single_for_device(host->dma_dev, + t->rx_dma, t->len, + DMA_FROM_DEVICE); + } + + status = spi_sync(spi, &host->m); + if (status == 0) + status = host->m.status; + + if (host->dma_dev) { + dma_sync_single_for_cpu(host->dma_dev, + host->data_dma, sizeof(*scratch), + DMA_BIDIRECTIONAL); + dma_sync_single_for_cpu(host->dma_dev, + t->rx_dma, t->len, + DMA_FROM_DEVICE); + } + + } else { + dev_dbg(&spi->dev, "read error %02x (%d)\n", status, status); + + /* we've read extra garbage, timed out, etc */ + if (status < 0) + return status; + + /* low four bits are an R2 subset, fifth seems to be + * vendor specific ... map them all to generic error.. + */ + return -EIO; + } + + if (host->mmc->use_spi_crc) { + u16 crc = crc_itu_t(0, t->rx_buf, t->len); + + be16_to_cpus(&scratch->crc_val); + if (scratch->crc_val != crc) { + dev_dbg(&spi->dev, "read - crc error: crc_val=0x%04x, " + "computed=0x%04x len=%d\n", + scratch->crc_val, crc, t->len); + return -EILSEQ; + } + } + + t->rx_buf += t->len; + if (host->dma_dev) + t->rx_dma += t->len; + + return 0; +} + +/* + * An MMC/SD data stage includes one or more blocks, optional CRCs, + * and inline handshaking. That handhaking makes it unlike most + * other SPI protocol stacks. + */ +static void +mmc_spi_data_do(struct mmc_spi_host *host, struct mmc_command *cmd, + struct mmc_data *data, u32 blk_size) +{ + struct spi_device *spi = host->spi; + struct device *dma_dev = host->dma_dev; + struct spi_transfer *t; + enum dma_data_direction direction; + struct scatterlist *sg; + unsigned n_sg; + int multiple = (data->blocks > 1); + + if (data->flags & MMC_DATA_READ) + direction = DMA_FROM_DEVICE; + else + direction = DMA_TO_DEVICE; + mmc_spi_setup_data_message(host, multiple, direction); + t = &host->t; + + /* Handle scatterlist segments one at a time, with synch for + * each 512-byte block + */ + for (sg = data->sg, n_sg = data->sg_len; n_sg; n_sg--, sg++) { + int status = 0; + dma_addr_t dma_addr = 0; + void *kmap_addr; + unsigned length = sg->length; + enum dma_data_direction dir = direction; + + /* set up dma mapping for controller drivers that might + * use DMA ... though they may fall back to PIO + */ + if (dma_dev) { + /* never invalidate whole *shared* pages ... */ + if ((sg->offset != 0 || length != PAGE_SIZE) + && dir == DMA_FROM_DEVICE) + dir = DMA_BIDIRECTIONAL; + + dma_addr = dma_map_page(dma_dev, sg->page, 0, + PAGE_SIZE, dir); + if (direction == DMA_TO_DEVICE) + t->tx_dma = dma_addr + sg->offset; + else + t->rx_dma = dma_addr + sg->offset; + } + + /* allow pio too; we don't allow highmem */ + kmap_addr = kmap(sg->page); + if (direction == DMA_TO_DEVICE) + t->tx_buf = kmap_addr + sg->offset; + else + t->rx_buf = kmap_addr + sg->offset; + + /* transfer each block, and update request status */ + while (length) { + t->len = min(length, blk_size); + + dev_dbg(&host->spi->dev, + " mmc_spi: %s block, %d bytes\n", + (direction == DMA_TO_DEVICE) + ? "write" + : "read", + t->len); + + if (direction == DMA_TO_DEVICE) + status = mmc_spi_writeblock(host, t); + else + status = mmc_spi_readblock(host, t); + if (status < 0) + break; + + data->bytes_xfered += t->len; + length -= t->len; + + if (!multiple) + break; + } + + /* discard mappings */ + if (direction == DMA_FROM_DEVICE) + flush_kernel_dcache_page(sg->page); + kunmap(sg->page); + if (dma_dev) + dma_unmap_page(dma_dev, dma_addr, PAGE_SIZE, dir); + + if (status < 0) { + data->error = status; + dev_dbg(&spi->dev, "%s status %d\n", + (direction == DMA_TO_DEVICE) + ? "write" : "read", + status); + break; + } + } + + /* NOTE some docs describe an MMC-only SET_BLOCK_COUNT (CMD23) that + * can be issued before multiblock writes. Unlike its more widely + * documented analogue for SD cards (SET_WR_BLK_ERASE_COUNT, ACMD23), + * that can affect the STOP_TRAN logic. Complete (and current) + * MMC specs should sort that out before Linux starts using CMD23. + */ + if (direction == DMA_TO_DEVICE && multiple) { + struct scratch *scratch = host->data; + int tmp; + const unsigned statlen = sizeof(scratch->status); + + dev_dbg(&spi->dev, " mmc_spi: STOP_TRAN\n"); + + /* Tweak the per-block message we set up earlier by morphing + * it to hold single buffer with the token followed by some + * all-ones bytes ... skip N(BR) (0..1), scan the rest for + * "not busy any longer" status, and leave chip selected. + */ + INIT_LIST_HEAD(&host->m.transfers); + list_add(&host->early_status.transfer_list, + &host->m.transfers); + + memset(scratch->status, 0xff, statlen); + scratch->status[0] = SPI_TOKEN_STOP_TRAN; + + host->early_status.tx_buf = host->early_status.rx_buf; + host->early_status.tx_dma = host->early_status.rx_dma; + host->early_status.len = statlen; + + if (host->dma_dev) + dma_sync_single_for_device(host->dma_dev, + host->data_dma, sizeof(*scratch), + DMA_BIDIRECTIONAL); + + tmp = spi_sync(spi, &host->m); + if (tmp == 0) + tmp = host->m.status; + + if (host->dma_dev) + dma_sync_single_for_cpu(host->dma_dev, + host->data_dma, sizeof(*scratch), + DMA_BIDIRECTIONAL); + + if (tmp < 0) { + if (!data->error) + data->error = tmp; + return; + } + + /* Ideally we collected "not busy" status with one I/O, + * avoiding wasteful byte-at-a-time scanning... but more + * I/O is often needed. + */ + for (tmp = 2; tmp < statlen; tmp++) { + if (scratch->status[tmp] != 0) + return; + } + tmp = mmc_spi_wait_unbusy(host, writeblock_timeout); + if (tmp < 0 && !data->error) + data->error = tmp; + } +} + +/****************************************************************************/ + +/* + * MMC driver implementation -- the interface to the MMC stack + */ + +static void mmc_spi_request(struct mmc_host *mmc, struct mmc_request *mrq) +{ + struct mmc_spi_host *host = mmc_priv(mmc); + int status = -EINVAL; + +#ifdef DEBUG + /* MMC core and layered drivers *MUST* issue SPI-aware commands */ + { + struct mmc_command *cmd; + int invalid = 0; + + cmd = mrq->cmd; + if (!mmc_spi_resp_type(cmd)) { + dev_dbg(&host->spi->dev, "bogus command\n"); + cmd->error = -EINVAL; + invalid = 1; + } + + cmd = mrq->stop; + if (cmd && !mmc_spi_resp_type(cmd)) { + dev_dbg(&host->spi->dev, "bogus STOP command\n"); + cmd->error = -EINVAL; + invalid = 1; + } + + if (invalid) { + dump_stack(); + mmc_request_done(host->mmc, mrq); + return; + } + } +#endif + + /* issue command; then optionally data and stop */ + status = mmc_spi_command_send(host, mrq, mrq->cmd, mrq->data != NULL); + if (status == 0 && mrq->data) { + mmc_spi_data_do(host, mrq->cmd, mrq->data, mrq->data->blksz); + if (mrq->stop) + status = mmc_spi_command_send(host, mrq, mrq->stop, 0); + else + mmc_cs_off(host); + } + + mmc_request_done(host->mmc, mrq); +} + +/* See Section 6.4.1, in SD "Simplified Physical Layer Specification 2.0" + * + * NOTE that here we can't know that the card has just been powered up; + * not all MMC/SD sockets support power switching. + * + * FIXME when the card is still in SPI mode, e.g. from a previous kernel, + * this doesn't seem to do the right thing at all... + */ +static void mmc_spi_initsequence(struct mmc_spi_host *host) +{ + /* Try to be very sure any previous command has completed; + * wait till not-busy, skip debris from any old commands. + */ + mmc_spi_wait_unbusy(host, r1b_timeout); + mmc_spi_readbytes(host, 10); + + /* + * Do a burst with chipselect active-high. We need to do this to + * meet the requirement of 74 clock cycles with both chipselect + * and CMD (MOSI) high before CMD0 ... after the card has been + * powered up to Vdd(min), and so is ready to take commands. + * + * Some cards are particularly needy of this (e.g. Viking "SD256") + * while most others don't seem to care. + * + * Note that this is one of the places MMC/SD plays games with the + * SPI protocol. Another is that when chipselect is released while + * the card returns BUSY status, the clock must issue several cycles + * with chipselect high before the card will stop driving its output. + */ + host->spi->mode |= SPI_CS_HIGH; + if (spi_setup(host->spi) != 0) { + /* Just warn; most cards work without it. */ + dev_warn(&host->spi->dev, + "can't change chip-select polarity\n"); + host->spi->mode &= ~SPI_CS_HIGH; + } else { + mmc_spi_readbytes(host, 18); + + host->spi->mode &= ~SPI_CS_HIGH; + if (spi_setup(host->spi) != 0) { + /* Wot, we can't get the same setup we had before? */ + dev_err(&host->spi->dev, + "can't restore chip-select polarity\n"); + } + } +} + +static char *mmc_powerstring(u8 power_mode) +{ + switch (power_mode) { + case MMC_POWER_OFF: return "off"; + case MMC_POWER_UP: return "up"; + case MMC_POWER_ON: return "on"; + } + return "?"; +} + +static void mmc_spi_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) +{ + struct mmc_spi_host *host = mmc_priv(mmc); + + if (host->power_mode != ios->power_mode) { + int canpower; + + canpower = host->pdata && host->pdata->setpower; + + dev_dbg(&host->spi->dev, "mmc_spi: power %s (%d)%s\n", + mmc_powerstring(ios->power_mode), + ios->vdd, + canpower ? ", can switch" : ""); + + /* switch power on/off if possible, accounting for + * max 250msec powerup time if needed. + */ + if (canpower) { + switch (ios->power_mode) { + case MMC_POWER_OFF: + case MMC_POWER_UP: + host->pdata->setpower(&host->spi->dev, + ios->vdd); + if (ios->power_mode == MMC_POWER_UP) + msleep(host->powerup_msecs); + } + } + + /* See 6.4.1 in the simplified SD card physical spec 2.0 */ + if (ios->power_mode == MMC_POWER_ON) + mmc_spi_initsequence(host); + + /* If powering down, ground all card inputs to avoid power + * delivery from data lines! On a shared SPI bus, this + * will probably be temporary; 6.4.2 of the simplified SD + * spec says this must last at least 1msec. + * + * - Clock low means CPOL 0, e.g. mode 0 + * - MOSI low comes from writing zero + * - Chipselect is usually active low... + */ + if (canpower && ios->power_mode == MMC_POWER_OFF) { + int mres; + + host->spi->mode &= ~(SPI_CPOL|SPI_CPHA); + mres = spi_setup(host->spi); + if (mres < 0) + dev_dbg(&host->spi->dev, + "switch to SPI mode 0 failed\n"); + + if (spi_w8r8(host->spi, 0x00) < 0) + dev_dbg(&host->spi->dev, + "put spi signals to low failed\n"); + + /* + * Now clock should be low due to spi mode 0; + * MOSI should be low because of written 0x00; + * chipselect should be low (it is active low) + * power supply is off, so now MMC is off too! + * + * FIXME no, chipselect can be high since the + * device is inactive and SPI_CS_HIGH is clear... + */ + msleep(10); + if (mres == 0) { + host->spi->mode |= (SPI_CPOL|SPI_CPHA); + mres = spi_setup(host->spi); + if (mres < 0) + dev_dbg(&host->spi->dev, + "switch back to SPI mode 3" + " failed\n"); + } + } + + host->power_mode = ios->power_mode; + } + + if (host->spi->max_speed_hz != ios->clock && ios->clock != 0) { + int status; + + host->spi->max_speed_hz = ios->clock; + status = spi_setup(host->spi); + dev_dbg(&host->spi->dev, + "mmc_spi: clock to %d Hz, %d\n", + host->spi->max_speed_hz, status); + } +} + +static int mmc_spi_get_ro(struct mmc_host *mmc) +{ + struct mmc_spi_host *host = mmc_priv(mmc); + + if (host->pdata && host->pdata->get_ro) + return host->pdata->get_ro(mmc->parent); + /* board doesn't support read only detection; assume writeable */ + return 0; +} + + +static const struct mmc_host_ops mmc_spi_ops = { + .request = mmc_spi_request, + .set_ios = mmc_spi_set_ios, + .get_ro = mmc_spi_get_ro, +}; + + +/****************************************************************************/ + +/* + * SPI driver implementation + */ + +static irqreturn_t +mmc_spi_detect_irq(int irq, void *mmc) +{ + struct mmc_spi_host *host = mmc_priv(mmc); + u16 delay_msec = max(host->pdata->detect_delay, (u16)100); + + mmc_detect_change(mmc, msecs_to_jiffies(delay_msec)); + return IRQ_HANDLED; +} + +static int mmc_spi_probe(struct spi_device *spi) +{ + void *ones; + struct mmc_host *mmc; + struct mmc_spi_host *host; + int status; + + /* MMC and SD specs only seem to care that sampling is on the + * rising edge ... meaning SPI modes 0 or 3. So either SPI mode + * should be legit. We'll use mode 0 since it seems to be a + * bit less troublesome on some hardware ... unclear why. + */ + spi->mode = SPI_MODE_0; + spi->bits_per_word = 8; + + status = spi_setup(spi); + if (status < 0) { + dev_dbg(&spi->dev, "needs SPI mode %02x, %d KHz; %d\n", + spi->mode, spi->max_speed_hz / 1000, + status); + return status; + } + + /* We can use the bus safely iff nobody else will interfere with + * us. That is, either we have the experimental exclusive access + * primitives ... or else there's nobody to share it with. + */ + if (spi->master->num_chipselect > 1) { + struct device *parent = spi->dev.parent; + + /* If there are multiple devices on this bus, we + * can't proceed. + */ + spin_lock(&parent->klist_children.k_lock); + if (parent->klist_children.k_list.next + != parent->klist_children.k_list.prev) + status = -EMLINK; + else + status = 0; + spin_unlock(&parent->klist_children.k_lock); + if (status < 0) { + dev_err(&spi->dev, "can't share SPI bus\n"); + return status; + } + + /* REVISIT we can't guarantee another device won't + * be added later. It's uncommon though ... for now, + * work as if this is safe. + */ + dev_warn(&spi->dev, "ASSUMING unshared SPI bus!\n"); + } + + /* We need a supply of ones to transmit. This is the only time + * the CPU touches these, so cache coherency isn't a concern. + * + * NOTE if many systems use more than one MMC-over-SPI connector + * it'd save some memory to share this. That's evidently rare. + */ + status = -ENOMEM; + ones = kmalloc(MMC_SPI_BLOCKSIZE, GFP_KERNEL); + if (!ones) + goto nomem; + memset(ones, 0xff, MMC_SPI_BLOCKSIZE); + + mmc = mmc_alloc_host(sizeof(*host), &spi->dev); + if (!mmc) + goto nomem; + + mmc->ops = &mmc_spi_ops; + mmc->max_blk_size = MMC_SPI_BLOCKSIZE; + + /* As long as we keep track of the number of successfully + * transmitted blocks, we're good for multiwrite. + */ + mmc->caps = MMC_CAP_SPI | MMC_CAP_MULTIWRITE; + + /* SPI doesn't need the lowspeed device identification thing for + * MMC or SD cards, since it never comes up in open drain mode. + * That's good; some SPI masters can't handle very low speeds! + * + * However, low speed SDIO cards need not handle over 400 KHz; + * that's the only reason not to use a few MHz for f_min (until + * the upper layer reads the target frequency from the CSD). + */ + mmc->f_min = 400000; + mmc->f_max = spi->max_speed_hz; + + host = mmc_priv(mmc); + host->mmc = mmc; + host->spi = spi; + + host->ones = ones; + + /* Platform data is used to hook up things like card sensing + * and power switching gpios. + */ + host->pdata = spi->dev.platform_data; + if (host->pdata) + mmc->ocr_avail = host->pdata->ocr_mask; + if (!mmc->ocr_avail) { + dev_warn(&spi->dev, "ASSUMING 3.2-3.4 V slot power\n"); + mmc->ocr_avail = MMC_VDD_32_33|MMC_VDD_33_34; + } + if (host->pdata && host->pdata->setpower) { + host->powerup_msecs = host->pdata->powerup_msecs; + if (!host->powerup_msecs || host->powerup_msecs > 250) + host->powerup_msecs = 250; + } + + dev_set_drvdata(&spi->dev, mmc); + + /* preallocate dma buffers */ + host->data = kmalloc(sizeof(*host->data), GFP_KERNEL); + if (!host->data) + goto fail_nobuf1; + + if (spi->master->cdev.dev->dma_mask) { + struct device *dev = spi->master->cdev.dev; + + host->dma_dev = dev; + host->ones_dma = dma_map_single(dev, ones, + MMC_SPI_BLOCKSIZE, DMA_TO_DEVICE); + host->data_dma = dma_map_single(dev, host->data, + sizeof(*host->data), DMA_BIDIRECTIONAL); + + /* REVISIT in theory those map operations can fail... */ + + dma_sync_single_for_cpu(host->dma_dev, + host->data_dma, sizeof(*host->data), + DMA_BIDIRECTIONAL); + } + + /* setup message for status/busy readback */ + spi_message_init(&host->readback); + host->readback.is_dma_mapped = (host->dma_dev != NULL); + + spi_message_add_tail(&host->status, &host->readback); + host->status.tx_buf = host->ones; + host->status.tx_dma = host->ones_dma; + host->status.rx_buf = &host->data->status; + host->status.rx_dma = host->data_dma + offsetof(struct scratch, status); + host->status.cs_change = 1; + + /* register card detect irq */ + if (host->pdata && host->pdata->init) { + status = host->pdata->init(&spi->dev, mmc_spi_detect_irq, mmc); + if (status != 0) + goto fail_glue_init; + } + + status = mmc_add_host(mmc); + if (status != 0) + goto fail_add_host; + + dev_info(&spi->dev, "SD/MMC host %s%s%s%s\n", + mmc->class_dev.bus_id, + host->dma_dev ? "" : ", no DMA", + (host->pdata && host->pdata->get_ro) + ? "" : ", no WP", + (host->pdata && host->pdata->setpower) + ? "" : ", no poweroff"); + return 0; + +fail_add_host: + mmc_remove_host (mmc); +fail_glue_init: + if (host->dma_dev) + dma_unmap_single(host->dma_dev, host->data_dma, + sizeof(*host->data), DMA_BIDIRECTIONAL); + kfree(host->data); + +fail_nobuf1: + mmc_free_host(mmc); + dev_set_drvdata(&spi->dev, NULL); + +nomem: + kfree(ones); + return status; +} + + +static int __devexit mmc_spi_remove(struct spi_device *spi) +{ + struct mmc_host *mmc = dev_get_drvdata(&spi->dev); + struct mmc_spi_host *host; + + if (mmc) { + host = mmc_priv(mmc); + + /* prevent new mmc_detect_change() calls */ + if (host->pdata && host->pdata->exit) + host->pdata->exit(&spi->dev, mmc); + + mmc_remove_host(mmc); + + if (host->dma_dev) { + dma_unmap_single(host->dma_dev, host->ones_dma, + MMC_SPI_BLOCKSIZE, DMA_TO_DEVICE); + dma_unmap_single(host->dma_dev, host->data_dma, + sizeof(*host->data), DMA_BIDIRECTIONAL); + } + + kfree(host->data); + kfree(host->ones); + + spi->max_speed_hz = mmc->f_max; + mmc_free_host(mmc); + dev_set_drvdata(&spi->dev, NULL); + } + return 0; +} + + +static struct spi_driver mmc_spi_driver = { + .driver = { + .name = "mmc_spi", + .bus = &spi_bus_type, + .owner = THIS_MODULE, + }, + .probe = mmc_spi_probe, + .remove = __devexit_p(mmc_spi_remove), +}; + + +static int __init mmc_spi_init(void) +{ + return spi_register_driver(&mmc_spi_driver); +} +module_init(mmc_spi_init); + + +static void __exit mmc_spi_exit(void) +{ + spi_unregister_driver(&mmc_spi_driver); +} +module_exit(mmc_spi_exit); + + +MODULE_AUTHOR("Mike Lavender, David Brownell, " + "Hans-Peter Nilsson, Jan Nikitenko"); +MODULE_DESCRIPTION("SPI SD/MMC host driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index be730c0..d0eb0a2 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -16,6 +16,7 @@ #include <linux/delay.h> #include <linux/err.h> #include <linux/highmem.h> +#include <linux/log2.h> #include <linux/mmc/host.h> #include <linux/amba/bus.h> #include <linux/clk.h> @@ -154,11 +155,11 @@ mmci_data_irq(struct mmci_host *host, struct mmc_data *data, } if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_TXUNDERRUN|MCI_RXOVERRUN)) { if (status & MCI_DATACRCFAIL) - data->error = MMC_ERR_BADCRC; + data->error = -EILSEQ; else if (status & MCI_DATATIMEOUT) - data->error = MMC_ERR_TIMEOUT; + data->error = -ETIMEDOUT; else if (status & (MCI_TXUNDERRUN|MCI_RXOVERRUN)) - data->error = MMC_ERR_FIFO; + data->error = -EIO; status |= MCI_DATAEND; /* @@ -193,12 +194,12 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd, cmd->resp[3] = readl(base + MMCIRESPONSE3); if (status & MCI_CMDTIMEOUT) { - cmd->error = MMC_ERR_TIMEOUT; + cmd->error = -ETIMEDOUT; } else if (status & MCI_CMDCRCFAIL && cmd->flags & MMC_RSP_CRC) { - cmd->error = MMC_ERR_BADCRC; + cmd->error = -EILSEQ; } - if (!cmd->data || cmd->error != MMC_ERR_NONE) { + if (!cmd->data || cmd->error) { if (host->data) mmci_stop_data(host); mmci_request_end(host, cmd->mrq); @@ -391,6 +392,14 @@ static void mmci_request(struct mmc_host *mmc, struct mmc_request *mrq) WARN_ON(host->mrq != NULL); + if (mrq->data && !is_power_of_2(mrq->data->blksz)) { + printk(KERN_ERR "%s: Unsupported block size (%d bytes)\n", + mmc_hostname(mmc), mrq->data->blksz); + mrq->cmd->error = -EINVAL; + mmc_request_done(mmc, mrq); + return; + } + spin_lock_irq(&host->lock); host->mrq = mrq; diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c index 0cf97ed..60a67df 100644 --- a/drivers/mmc/host/omap.c +++ b/drivers/mmc/host/omap.c @@ -263,7 +263,7 @@ mmc_omap_xfer_done(struct mmc_omap_host *host, struct mmc_data *data) enum dma_data_direction dma_data_dir; BUG_ON(host->dma_ch < 0); - if (data->error != MMC_ERR_NONE) + if (data->error) omap_stop_dma(host->dma_ch); /* Release DMA channel lazily */ mod_timer(&host->dma_timer, jiffies + HZ); @@ -368,7 +368,7 @@ mmc_omap_cmd_done(struct mmc_omap_host *host, struct mmc_command *cmd) } } - if (host->data == NULL || cmd->error != MMC_ERR_NONE) { + if (host->data == NULL || cmd->error) { host->mrq = NULL; clk_disable(host->fclk); mmc_request_done(host->mmc, cmd->mrq); @@ -475,14 +475,14 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id) if (status & OMAP_MMC_STAT_DATA_TOUT) { dev_dbg(mmc_dev(host->mmc), "data timeout\n"); if (host->data) { - host->data->error |= MMC_ERR_TIMEOUT; + host->data->error = -ETIMEDOUT; transfer_error = 1; } } if (status & OMAP_MMC_STAT_DATA_CRC) { if (host->data) { - host->data->error |= MMC_ERR_BADCRC; + host->data->error = -EILSEQ; dev_dbg(mmc_dev(host->mmc), "data CRC error, bytes left %d\n", host->total_bytes_left); @@ -504,7 +504,7 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id) dev_err(mmc_dev(host->mmc), "command timeout, CMD %d\n", host->cmd->opcode); - host->cmd->error = MMC_ERR_TIMEOUT; + host->cmd->error = -ETIMEDOUT; end_command = 1; } } @@ -514,7 +514,7 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id) dev_err(mmc_dev(host->mmc), "command CRC error (CMD%d, arg 0x%08x)\n", host->cmd->opcode, host->cmd->arg); - host->cmd->error = MMC_ERR_BADCRC; + host->cmd->error = -EILSEQ; end_command = 1; } else dev_err(mmc_dev(host->mmc), diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c index ff96033..657901e 100644 --- a/drivers/mmc/host/pxamci.c +++ b/drivers/mmc/host/pxamci.c @@ -142,6 +142,10 @@ static void pxamci_setup_data(struct pxamci_host *host, struct mmc_data *data) host->dma_dir); for (i = 0; i < host->dma_len; i++) { + unsigned int length = sg_dma_len(&data->sg[i]); + host->sg_cpu[i].dcmd = dcmd | length; + if (length & 31 && !(data->flags & MMC_DATA_READ)) + host->sg_cpu[i].dcmd |= DCMD_ENDIRQEN; if (data->flags & MMC_DATA_READ) { host->sg_cpu[i].dsadr = host->res->start + MMC_RXFIFO; host->sg_cpu[i].dtadr = sg_dma_address(&data->sg[i]); @@ -149,7 +153,6 @@ static void pxamci_setup_data(struct pxamci_host *host, struct mmc_data *data) host->sg_cpu[i].dsadr = sg_dma_address(&data->sg[i]); host->sg_cpu[i].dtadr = host->res->start + MMC_TXFIFO; } - host->sg_cpu[i].dcmd = dcmd | sg_dma_len(&data->sg[i]); host->sg_cpu[i].ddadr = host->sg_dma + (i + 1) * sizeof(struct pxa_dma_desc); } @@ -226,7 +229,7 @@ static int pxamci_cmd_done(struct pxamci_host *host, unsigned int stat) } if (stat & STAT_TIME_OUT_RESPONSE) { - cmd->error = MMC_ERR_TIMEOUT; + cmd->error = -ETIMEDOUT; } else if (stat & STAT_RES_CRC_ERR && cmd->flags & MMC_RSP_CRC) { #ifdef CONFIG_PXA27x /* @@ -239,11 +242,11 @@ static int pxamci_cmd_done(struct pxamci_host *host, unsigned int stat) pr_debug("ignoring CRC from command %d - *risky*\n", cmd->opcode); } else #endif - cmd->error = MMC_ERR_BADCRC; + cmd->error = -EILSEQ; } pxamci_disable_irq(host, END_CMD_RES); - if (host->data && cmd->error == MMC_ERR_NONE) { + if (host->data && !cmd->error) { pxamci_enable_irq(host, DATA_TRAN_DONE); } else { pxamci_finish_request(host, host->mrq); @@ -264,9 +267,9 @@ static int pxamci_data_done(struct pxamci_host *host, unsigned int stat) host->dma_dir); if (stat & STAT_READ_TIME_OUT) - data->error = MMC_ERR_TIMEOUT; + data->error = -ETIMEDOUT; else if (stat & (STAT_CRC_READ_ERROR|STAT_CRC_WRITE_ERROR)) - data->error = MMC_ERR_BADCRC; + data->error = -EILSEQ; /* * There appears to be a hardware design bug here. There seems to @@ -274,7 +277,7 @@ static int pxamci_data_done(struct pxamci_host *host, unsigned int stat) * This means that if there was an error on any block, we mark all * data blocks as being in error. */ - if (data->error == MMC_ERR_NONE) + if (!data->error) data->bytes_xfered = data->blocks * data->blksz; else data->bytes_xfered = 0; @@ -284,7 +287,7 @@ static int pxamci_data_done(struct pxamci_host *host, unsigned int stat) host->data = NULL; if (host->mrq->stop) { pxamci_stop_clock(host); - pxamci_start_cmd(host, host->mrq->stop, 0); + pxamci_start_cmd(host, host->mrq->stop, host->cmdat); } else { pxamci_finish_request(host, host->mrq); } @@ -298,7 +301,7 @@ static irqreturn_t pxamci_irq(int irq, void *devid) unsigned int ireg; int handled = 0; - ireg = readl(host->base + MMC_I_REG); + ireg = readl(host->base + MMC_I_REG) & ~readl(host->base + MMC_I_MASK); if (ireg) { unsigned stat = readl(host->base + MMC_STAT); @@ -309,6 +312,10 @@ static irqreturn_t pxamci_irq(int irq, void *devid) handled |= pxamci_cmd_done(host, stat); if (ireg & DATA_TRAN_DONE) handled |= pxamci_data_done(host, stat); + if (ireg & SDIO_INT) { + mmc_signal_sdio_irq(host->mmc); + handled = 1; + } } return IRQ_RETVAL(handled); @@ -382,20 +389,46 @@ static void pxamci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) host->cmdat |= CMDAT_INIT; } + if (ios->bus_width == MMC_BUS_WIDTH_4) + host->cmdat |= CMDAT_SD_4DAT; + else + host->cmdat &= ~CMDAT_SD_4DAT; + pr_debug("PXAMCI: clkrt = %x cmdat = %x\n", host->clkrt, host->cmdat); } +static void pxamci_enable_sdio_irq(struct mmc_host *host, int enable) +{ + struct pxamci_host *pxa_host = mmc_priv(host); + + if (enable) + pxamci_enable_irq(pxa_host, SDIO_INT); + else + pxamci_disable_irq(pxa_host, SDIO_INT); +} + static const struct mmc_host_ops pxamci_ops = { - .request = pxamci_request, - .get_ro = pxamci_get_ro, - .set_ios = pxamci_set_ios, + .request = pxamci_request, + .get_ro = pxamci_get_ro, + .set_ios = pxamci_set_ios, + .enable_sdio_irq = pxamci_enable_sdio_irq, }; static void pxamci_dma_irq(int dma, void *devid) { - printk(KERN_ERR "DMA%d: IRQ???\n", dma); - DCSR(dma) = DCSR_STARTINTR|DCSR_ENDINTR|DCSR_BUSERR; + struct pxamci_host *host = devid; + int dcsr = DCSR(dma); + DCSR(dma) = dcsr & ~DCSR_STOPIRQEN; + + if (dcsr & DCSR_ENDINTR) { + writel(BUF_PART_FULL, host->base + MMC_PRTBUF); + } else { + printk(KERN_ERR "%s: DMA error on channel %d (DCSR=%#x)\n", + mmc_hostname(host->mmc), dma, dcsr); + host->data->error = -EIO; + pxamci_data_done(host, 0); + } } static irqreturn_t pxamci_detect_irq(int irq, void *devid) @@ -444,9 +477,9 @@ static int pxamci_probe(struct platform_device *pdev) mmc->max_seg_size = PAGE_SIZE; /* - * Block length register is 10 bits. + * Block length register is only 10 bits before PXA27x. */ - mmc->max_blk_size = 1023; + mmc->max_blk_size = (cpu_is_pxa21x() || cpu_is_pxa25x()) ? 1023 : 2048; /* * Block count register is 16 bits. @@ -460,6 +493,12 @@ static int pxamci_probe(struct platform_device *pdev) mmc->ocr_avail = host->pdata ? host->pdata->ocr_mask : MMC_VDD_32_33|MMC_VDD_33_34; + mmc->caps = 0; + host->cmdat = 0; + if (!cpu_is_pxa21x() && !cpu_is_pxa25x()) { + mmc->caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ; + host->cmdat |= CMDAT_SDIO_INT_EN; + } host->sg_cpu = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, &host->sg_dma, GFP_KERNEL); if (!host->sg_cpu) { diff --git a/drivers/mmc/host/pxamci.h b/drivers/mmc/host/pxamci.h index df17c28..3153e77 100644 --- a/drivers/mmc/host/pxamci.h +++ b/drivers/mmc/host/pxamci.h @@ -25,6 +25,8 @@ #define SPI_EN (1 << 0) #define MMC_CMDAT 0x0010 +#define CMDAT_SDIO_INT_EN (1 << 11) +#define CMDAT_SD_4DAT (1 << 8) #define CMDAT_DMAEN (1 << 7) #define CMDAT_INIT (1 << 6) #define CMDAT_BUSY (1 << 5) diff --git a/drivers/mmc/host/ricoh_mmc.c b/drivers/mmc/host/ricoh_mmc.c new file mode 100644 index 0000000..1e87045 --- /dev/null +++ b/drivers/mmc/host/ricoh_mmc.c @@ -0,0 +1,151 @@ +/* + * ricoh_mmc.c - Dummy driver to disable the Rioch MMC controller. + * + * Copyright (C) 2007 Philip Langdale, All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +/* + * This is a conceptually ridiculous driver, but it is required by the way + * the Ricoh multi-function R5C832 works. This chip implements firewire + * and four different memory card controllers. Two of those controllers are + * an SDHCI controller and a proprietary MMC controller. The linux SDHCI + * driver supports MMC cards but the chip detects MMC cards in hardware + * and directs them to the MMC controller - so the SDHCI driver never sees + * them. To get around this, we must disable the useless MMC controller. + * At that point, the SDHCI controller will start seeing them. As a bonus, + * a detection event occurs immediately, even if the MMC card is already + * in the reader. + * + * The relevant registers live on the firewire function, so this is unavoidably + * ugly. Such is life. + */ + +#include <linux/pci.h> + +#define DRIVER_NAME "ricoh-mmc" + +static const struct pci_device_id pci_ids[] __devinitdata = { + { + .vendor = PCI_VENDOR_ID_RICOH, + .device = PCI_DEVICE_ID_RICOH_R5C843, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + }, + { /* end: all zeroes */ }, +}; + +MODULE_DEVICE_TABLE(pci, pci_ids); + +static int __devinit ricoh_mmc_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + u8 rev; + + struct pci_dev *fw_dev = NULL; + + BUG_ON(pdev == NULL); + BUG_ON(ent == NULL); + + pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev); + + printk(KERN_INFO DRIVER_NAME + ": Ricoh MMC controller found at %s [%04x:%04x] (rev %x)\n", + pci_name(pdev), (int)pdev->vendor, (int)pdev->device, + (int)rev); + + while ((fw_dev = pci_get_device(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5C832, fw_dev))) { + if (PCI_SLOT(pdev->devfn) == PCI_SLOT(fw_dev->devfn) && + pdev->bus == fw_dev->bus) { + u8 write_enable; + u8 disable; + + pci_read_config_byte(fw_dev, 0xCB, &disable); + if (disable & 0x02) { + printk(KERN_INFO DRIVER_NAME + ": Controller already disabled. Nothing to do.\n"); + return -ENODEV; + } + + pci_read_config_byte(fw_dev, 0xCA, &write_enable); + pci_write_config_byte(fw_dev, 0xCA, 0x57); + pci_write_config_byte(fw_dev, 0xCB, disable | 0x02); + pci_write_config_byte(fw_dev, 0xCA, write_enable); + + pci_set_drvdata(pdev, fw_dev); + + printk(KERN_INFO DRIVER_NAME + ": Controller is now disabled.\n"); + + break; + } + } + + if (pci_get_drvdata(pdev) == NULL) { + printk(KERN_WARNING DRIVER_NAME + ": Main firewire function not found. Cannot disable controller.\n"); + return -ENODEV; + } + + return 0; +} + +static void __devexit ricoh_mmc_remove(struct pci_dev *pdev) +{ + u8 write_enable; + u8 disable; + struct pci_dev *fw_dev = NULL; + + fw_dev = pci_get_drvdata(pdev); + BUG_ON(fw_dev == NULL); + + pci_read_config_byte(fw_dev, 0xCA, &write_enable); + pci_read_config_byte(fw_dev, 0xCB, &disable); + pci_write_config_byte(fw_dev, 0xCA, 0x57); + pci_write_config_byte(fw_dev, 0xCB, disable & ~0x02); + pci_write_config_byte(fw_dev, 0xCA, write_enable); + + printk(KERN_INFO DRIVER_NAME + ": Controller is now re-enabled.\n"); + + pci_set_drvdata(pdev, NULL); +} + +static struct pci_driver ricoh_mmc_driver = { + .name = DRIVER_NAME, + .id_table = pci_ids, + .probe = ricoh_mmc_probe, + .remove = __devexit_p(ricoh_mmc_remove), +}; + +/*****************************************************************************\ + * * + * Driver init/exit * + * * +\*****************************************************************************/ + +static int __init ricoh_mmc_drv_init(void) +{ + printk(KERN_INFO DRIVER_NAME + ": Ricoh MMC Controller disabling driver\n"); + printk(KERN_INFO DRIVER_NAME ": Copyright(c) Philip Langdale\n"); + + return pci_register_driver(&ricoh_mmc_driver); +} + +static void __exit ricoh_mmc_drv_exit(void) +{ + pci_unregister_driver(&ricoh_mmc_driver); +} + +module_init(ricoh_mmc_drv_init); +module_exit(ricoh_mmc_drv_exit); + +MODULE_AUTHOR("Philip Langdale <philipl@alumni.utexas.net>"); +MODULE_DESCRIPTION("Ricoh MMC Controller disabling driver"); +MODULE_LICENSE("GPL"); + diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 20a7d89..b397121 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -25,8 +25,6 @@ #define DBG(f, x...) \ pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x) -static unsigned int debug_nodma = 0; -static unsigned int debug_forcedma = 0; static unsigned int debug_quirks = 0; #define SDHCI_QUIRK_CLOCK_BEFORE_RESET (1<<0) @@ -35,6 +33,7 @@ static unsigned int debug_quirks = 0; #define SDHCI_QUIRK_NO_CARD_NO_RESET (1<<2) #define SDHCI_QUIRK_SINGLE_POWER_WRITE (1<<3) #define SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS (1<<4) +#define SDHCI_QUIRK_BROKEN_DMA (1<<5) static const struct pci_device_id pci_ids[] __devinitdata = { { @@ -68,7 +67,8 @@ static const struct pci_device_id pci_ids[] __devinitdata = { .device = PCI_DEVICE_ID_ENE_CB712_SD, .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, - .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE, + .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE | + SDHCI_QUIRK_BROKEN_DMA, }, { @@ -76,7 +76,8 @@ static const struct pci_device_id pci_ids[] __devinitdata = { .device = PCI_DEVICE_ID_ENE_CB712_SD_2, .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, - .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE, + .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE | + SDHCI_QUIRK_BROKEN_DMA, }, { @@ -132,7 +133,7 @@ static void sdhci_dumpregs(struct sdhci_host *host) readb(host->ioaddr + SDHCI_POWER_CONTROL), readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL)); printk(KERN_DEBUG DRIVER_NAME ": Wake-up: 0x%08x | Clock: 0x%08x\n", - readb(host->ioaddr + SDHCI_WALK_UP_CONTROL), + readb(host->ioaddr + SDHCI_WAKE_UP_CONTROL), readw(host->ioaddr + SDHCI_CLOCK_CONTROL)); printk(KERN_DEBUG DRIVER_NAME ": Timeout: 0x%08x | Int stat: 0x%08x\n", readb(host->ioaddr + SDHCI_TIMEOUT_CONTROL), @@ -481,16 +482,16 @@ static void sdhci_finish_data(struct sdhci_host *host) * Controller doesn't count down when in single block mode. */ if (data->blocks == 1) - blocks = (data->error == MMC_ERR_NONE) ? 0 : 1; + blocks = (data->error == 0) ? 0 : 1; else blocks = readw(host->ioaddr + SDHCI_BLOCK_COUNT); data->bytes_xfered = data->blksz * (data->blocks - blocks); - if ((data->error == MMC_ERR_NONE) && blocks) { + if (!data->error && blocks) { printk(KERN_ERR "%s: Controller signalled completion even " "though there were blocks left.\n", mmc_hostname(host->mmc)); - data->error = MMC_ERR_FAILED; + data->error = -EIO; } if (data->stop) { @@ -498,7 +499,7 @@ static void sdhci_finish_data(struct sdhci_host *host) * The controller needs a reset of internal state machines * upon error conditions. */ - if (data->error != MMC_ERR_NONE) { + if (data->error) { sdhci_reset(host, SDHCI_RESET_CMD); sdhci_reset(host, SDHCI_RESET_DATA); } @@ -533,7 +534,7 @@ static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd) printk(KERN_ERR "%s: Controller never released " "inhibit bit(s).\n", mmc_hostname(host->mmc)); sdhci_dumpregs(host); - cmd->error = MMC_ERR_FAILED; + cmd->error = -EIO; tasklet_schedule(&host->finish_tasklet); return; } @@ -554,7 +555,7 @@ static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd) if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) { printk(KERN_ERR "%s: Unsupported response type!\n", mmc_hostname(host->mmc)); - cmd->error = MMC_ERR_INVALID; + cmd->error = -EINVAL; tasklet_schedule(&host->finish_tasklet); return; } @@ -601,7 +602,7 @@ static void sdhci_finish_command(struct sdhci_host *host) } } - host->cmd->error = MMC_ERR_NONE; + host->cmd->error = 0; if (host->data && host->data_early) sdhci_finish_data(host); @@ -722,7 +723,7 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq) host->mrq = mrq; if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) { - host->mrq->cmd->error = MMC_ERR_TIMEOUT; + host->mrq->cmd->error = -ENOMEDIUM; tasklet_schedule(&host->finish_tasklet); } else sdhci_send_command(host, mrq->cmd); @@ -800,10 +801,35 @@ static int sdhci_get_ro(struct mmc_host *mmc) return !(present & SDHCI_WRITE_PROTECT); } +static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable) +{ + struct sdhci_host *host; + unsigned long flags; + u32 ier; + + host = mmc_priv(mmc); + + spin_lock_irqsave(&host->lock, flags); + + ier = readl(host->ioaddr + SDHCI_INT_ENABLE); + + ier &= ~SDHCI_INT_CARD_INT; + if (enable) + ier |= SDHCI_INT_CARD_INT; + + writel(ier, host->ioaddr + SDHCI_INT_ENABLE); + writel(ier, host->ioaddr + SDHCI_SIGNAL_ENABLE); + + mmiowb(); + + spin_unlock_irqrestore(&host->lock, flags); +} + static const struct mmc_host_ops sdhci_ops = { .request = sdhci_request, .set_ios = sdhci_set_ios, .get_ro = sdhci_get_ro, + .enable_sdio_irq = sdhci_enable_sdio_irq, }; /*****************************************************************************\ @@ -831,7 +857,7 @@ static void sdhci_tasklet_card(unsigned long param) sdhci_reset(host, SDHCI_RESET_CMD); sdhci_reset(host, SDHCI_RESET_DATA); - host->mrq->cmd->error = MMC_ERR_FAILED; + host->mrq->cmd->error = -ENOMEDIUM; tasklet_schedule(&host->finish_tasklet); } } @@ -859,9 +885,9 @@ static void sdhci_tasklet_finish(unsigned long param) * The controller needs a reset of internal state machines * upon error conditions. */ - if ((mrq->cmd->error != MMC_ERR_NONE) || - (mrq->data && ((mrq->data->error != MMC_ERR_NONE) || - (mrq->data->stop && (mrq->data->stop->error != MMC_ERR_NONE))))) { + if (mrq->cmd->error || + (mrq->data && (mrq->data->error || + (mrq->data->stop && mrq->data->stop->error)))) { /* Some controllers need this kick or reset won't work here */ if (host->chip->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET) { @@ -906,13 +932,13 @@ static void sdhci_timeout_timer(unsigned long data) sdhci_dumpregs(host); if (host->data) { - host->data->error = MMC_ERR_TIMEOUT; + host->data->error = -ETIMEDOUT; sdhci_finish_data(host); } else { if (host->cmd) - host->cmd->error = MMC_ERR_TIMEOUT; + host->cmd->error = -ETIMEDOUT; else - host->mrq->cmd->error = MMC_ERR_TIMEOUT; + host->mrq->cmd->error = -ETIMEDOUT; tasklet_schedule(&host->finish_tasklet); } @@ -941,13 +967,12 @@ static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask) } if (intmask & SDHCI_INT_TIMEOUT) - host->cmd->error = MMC_ERR_TIMEOUT; - else if (intmask & SDHCI_INT_CRC) - host->cmd->error = MMC_ERR_BADCRC; - else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX)) - host->cmd->error = MMC_ERR_FAILED; + host->cmd->error = -ETIMEDOUT; + else if (intmask & (SDHCI_INT_CRC | SDHCI_INT_END_BIT | + SDHCI_INT_INDEX)) + host->cmd->error = -EILSEQ; - if (host->cmd->error != MMC_ERR_NONE) + if (host->cmd->error) tasklet_schedule(&host->finish_tasklet); else if (intmask & SDHCI_INT_RESPONSE) sdhci_finish_command(host); @@ -974,13 +999,11 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask) } if (intmask & SDHCI_INT_DATA_TIMEOUT) - host->data->error = MMC_ERR_TIMEOUT; - else if (intmask & SDHCI_INT_DATA_CRC) - host->data->error = MMC_ERR_BADCRC; - else if (intmask & SDHCI_INT_DATA_END_BIT) - host->data->error = MMC_ERR_FAILED; + host->data->error = -ETIMEDOUT; + else if (intmask & (SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_END_BIT)) + host->data->error = -EILSEQ; - if (host->data->error != MMC_ERR_NONE) + if (host->data->error) sdhci_finish_data(host); else { if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL)) @@ -1015,6 +1038,7 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id) irqreturn_t result; struct sdhci_host* host = dev_id; u32 intmask; + int cardint = 0; spin_lock(&host->lock); @@ -1059,6 +1083,11 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id) intmask &= ~SDHCI_INT_BUS_POWER; + if (intmask & SDHCI_INT_CARD_INT) + cardint = 1; + + intmask &= ~SDHCI_INT_CARD_INT; + if (intmask) { printk(KERN_ERR "%s: Unexpected interrupt 0x%08x.\n", mmc_hostname(host->mmc), intmask); @@ -1073,6 +1102,12 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id) out: spin_unlock(&host->lock); + /* + * We have to delay this as it calls back into the driver. + */ + if (cardint) + mmc_signal_sdio_irq(host->mmc); + return result; } @@ -1258,20 +1293,26 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot) caps = readl(host->ioaddr + SDHCI_CAPABILITIES); - if (debug_nodma) - DBG("DMA forced off\n"); - else if (debug_forcedma) { - DBG("DMA forced on\n"); - host->flags |= SDHCI_USE_DMA; - } else if (chip->quirks & SDHCI_QUIRK_FORCE_DMA) + if (chip->quirks & SDHCI_QUIRK_FORCE_DMA) host->flags |= SDHCI_USE_DMA; - else if ((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA) - DBG("Controller doesn't have DMA interface\n"); else if (!(caps & SDHCI_CAN_DO_DMA)) DBG("Controller doesn't have DMA capability\n"); else host->flags |= SDHCI_USE_DMA; + if ((chip->quirks & SDHCI_QUIRK_BROKEN_DMA) && + (host->flags & SDHCI_USE_DMA)) { + DBG("Disabling DMA as it is marked broken"); + host->flags &= ~SDHCI_USE_DMA; + } + + if (((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA) && + (host->flags & SDHCI_USE_DMA)) { + printk(KERN_WARNING "%s: Will use DMA " + "mode even though HW doesn't fully " + "claim to support it.\n", host->slot_descr); + } + if (host->flags & SDHCI_USE_DMA) { if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) { printk(KERN_WARNING "%s: No suitable DMA available. " @@ -1312,7 +1353,7 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot) mmc->ops = &sdhci_ops; mmc->f_min = host->max_clk / 256; mmc->f_max = host->max_clk; - mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE | MMC_CAP_BYTEBLOCK; + mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE | MMC_CAP_SDIO_IRQ; if (caps & SDHCI_CAN_DO_HISPD) mmc->caps |= MMC_CAP_SD_HIGHSPEED; @@ -1565,14 +1606,10 @@ static void __exit sdhci_drv_exit(void) module_init(sdhci_drv_init); module_exit(sdhci_drv_exit); -module_param(debug_nodma, uint, 0444); -module_param(debug_forcedma, uint, 0444); module_param(debug_quirks, uint, 0444); MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>"); MODULE_DESCRIPTION("Secure Digital Host Controller Interface driver"); MODULE_LICENSE("GPL"); -MODULE_PARM_DESC(debug_nodma, "Forcefully disable DMA transfers. (default 0)"); -MODULE_PARM_DESC(debug_forcedma, "Forcefully enable DMA transfers. (default 0)"); MODULE_PARM_DESC(debug_quirks, "Force certain quirks."); diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index e28987d..05195ea 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -81,7 +81,7 @@ #define SDHCI_BLOCK_GAP_CONTROL 0x2A -#define SDHCI_WALK_UP_CONTROL 0x2B +#define SDHCI_WAKE_UP_CONTROL 0x2B #define SDHCI_CLOCK_CONTROL 0x2C #define SDHCI_DIVIDER_SHIFT 8 diff --git a/drivers/mmc/host/tifm_sd.c b/drivers/mmc/host/tifm_sd.c index 8b736e9..9b90479 100644 --- a/drivers/mmc/host/tifm_sd.c +++ b/drivers/mmc/host/tifm_sd.c @@ -16,6 +16,7 @@ #include <linux/mmc/host.h> #include <linux/highmem.h> #include <linux/scatterlist.h> +#include <linux/log2.h> #include <asm/io.h> #define DRIVER_NAME "tifm_sd" @@ -404,14 +405,14 @@ static void tifm_sd_check_status(struct tifm_sd *host) struct tifm_dev *sock = host->dev; struct mmc_command *cmd = host->req->cmd; - if (cmd->error != MMC_ERR_NONE) + if (cmd->error) goto finish_request; if (!(host->cmd_flags & CMD_READY)) return; if (cmd->data) { - if (cmd->data->error != MMC_ERR_NONE) { + if (cmd->data->error) { if ((host->cmd_flags & SCMD_ACTIVE) && !(host->cmd_flags & SCMD_READY)) return; @@ -504,7 +505,7 @@ static void tifm_sd_card_event(struct tifm_dev *sock) { struct tifm_sd *host; unsigned int host_status = 0; - int cmd_error = MMC_ERR_NONE; + int cmd_error = 0; struct mmc_command *cmd = NULL; unsigned long flags; @@ -521,15 +522,15 @@ static void tifm_sd_card_event(struct tifm_dev *sock) writel(host_status & TIFM_MMCSD_ERRMASK, sock->addr + SOCK_MMCSD_STATUS); if (host_status & TIFM_MMCSD_CTO) - cmd_error = MMC_ERR_TIMEOUT; + cmd_error = -ETIMEDOUT; else if (host_status & TIFM_MMCSD_CCRC) - cmd_error = MMC_ERR_BADCRC; + cmd_error = -EILSEQ; if (cmd->data) { if (host_status & TIFM_MMCSD_DTO) - cmd->data->error = MMC_ERR_TIMEOUT; + cmd->data->error = -ETIMEDOUT; else if (host_status & TIFM_MMCSD_DCRC) - cmd->data->error = MMC_ERR_BADCRC; + cmd->data->error = -EILSEQ; } writel(TIFM_FIFO_INT_SETALL, @@ -626,14 +627,21 @@ static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq) spin_lock_irqsave(&sock->lock, flags); if (host->eject) { - spin_unlock_irqrestore(&sock->lock, flags); + mrq->cmd->error = -ENOMEDIUM; goto err_out; } if (host->req) { printk(KERN_ERR "%s : unfinished request detected\n", sock->dev.bus_id); - spin_unlock_irqrestore(&sock->lock, flags); + mrq->cmd->error = -ETIMEDOUT; + goto err_out; + } + + if (mrq->data && !is_power_of_2(mrq->data->blksz)) { + printk(KERN_ERR "%s: Unsupported block size (%d bytes)\n", + sock->dev.bus_id, mrq->data->blksz); + mrq->cmd->error = -EINVAL; goto err_out; } @@ -722,7 +730,7 @@ static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq) return; err_out: - mrq->cmd->error = MMC_ERR_TIMEOUT; + spin_unlock_irqrestore(&sock->lock, flags); mmc_request_done(mmc, mrq); } @@ -1012,9 +1020,9 @@ static void tifm_sd_remove(struct tifm_dev *sock) writel(TIFM_FIFO_INT_SETALL, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); writel(0, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET); - host->req->cmd->error = MMC_ERR_TIMEOUT; + host->req->cmd->error = -ENOMEDIUM; if (host->req->stop) - host->req->stop->error = MMC_ERR_TIMEOUT; + host->req->stop->error = -ENOMEDIUM; tasklet_schedule(&host->finish_tasklet); } spin_unlock_irqrestore(&sock->lock, flags); diff --git a/drivers/mmc/host/wbsd.c b/drivers/mmc/host/wbsd.c index 9bf2a87..80db11c 100644 --- a/drivers/mmc/host/wbsd.c +++ b/drivers/mmc/host/wbsd.c @@ -317,7 +317,7 @@ static inline void wbsd_get_short_reply(struct wbsd_host *host, * Correct response type? */ if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_SHORT) { - cmd->error = MMC_ERR_INVALID; + cmd->error = -EILSEQ; return; } @@ -337,7 +337,7 @@ static inline void wbsd_get_long_reply(struct wbsd_host *host, * Correct response type? */ if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_LONG) { - cmd->error = MMC_ERR_INVALID; + cmd->error = -EILSEQ; return; } @@ -372,7 +372,7 @@ static void wbsd_send_command(struct wbsd_host *host, struct mmc_command *cmd) for (i = 3; i >= 0; i--) outb((cmd->arg >> (i * 8)) & 0xff, host->base + WBSD_CMDR); - cmd->error = MMC_ERR_NONE; + cmd->error = 0; /* * Wait for the request to complete. @@ -392,13 +392,13 @@ static void wbsd_send_command(struct wbsd_host *host, struct mmc_command *cmd) /* Card removed? */ if (isr & WBSD_INT_CARD) - cmd->error = MMC_ERR_TIMEOUT; + cmd->error = -ENOMEDIUM; /* Timeout? */ else if (isr & WBSD_INT_TIMEOUT) - cmd->error = MMC_ERR_TIMEOUT; + cmd->error = -ETIMEDOUT; /* CRC? */ else if ((cmd->flags & MMC_RSP_CRC) && (isr & WBSD_INT_CRC)) - cmd->error = MMC_ERR_BADCRC; + cmd->error = -EILSEQ; /* All ok */ else { if (cmd->flags & MMC_RSP_136) @@ -585,7 +585,7 @@ static void wbsd_prepare_data(struct wbsd_host *host, struct mmc_data *data) ((blksize >> 4) & 0xF0) | WBSD_DATA_WIDTH); wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF); } else { - data->error = MMC_ERR_INVALID; + data->error = -EINVAL; return; } @@ -607,7 +607,7 @@ static void wbsd_prepare_data(struct wbsd_host *host, struct mmc_data *data) */ BUG_ON(size > 0x10000); if (size > 0x10000) { - data->error = MMC_ERR_INVALID; + data->error = -EINVAL; return; } @@ -669,7 +669,7 @@ static void wbsd_prepare_data(struct wbsd_host *host, struct mmc_data *data) } } - data->error = MMC_ERR_NONE; + data->error = 0; } static void wbsd_finish_data(struct wbsd_host *host, struct mmc_data *data) @@ -724,8 +724,8 @@ static void wbsd_finish_data(struct wbsd_host *host, struct mmc_data *data) "%d bytes left.\n", mmc_hostname(host->mmc), count); - if (data->error == MMC_ERR_NONE) - data->error = MMC_ERR_FAILED; + if (!data->error) + data->error = -EIO; } else { /* * Transfer data from DMA buffer to @@ -735,7 +735,7 @@ static void wbsd_finish_data(struct wbsd_host *host, struct mmc_data *data) wbsd_dma_to_sg(host, data); } - if (data->error != MMC_ERR_NONE) { + if (data->error) { if (data->bytes_xfered) data->bytes_xfered -= data->blksz; } @@ -767,11 +767,10 @@ static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq) host->mrq = mrq; /* - * If there is no card in the slot then - * timeout immediatly. + * Check that there is actually a card in the slot. */ if (!(host->flags & WBSD_FCARD_PRESENT)) { - cmd->error = MMC_ERR_TIMEOUT; + cmd->error = -ENOMEDIUM; goto done; } @@ -807,7 +806,7 @@ static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq) "supported by this controller.\n", mmc_hostname(host->mmc), cmd->opcode); #endif - cmd->error = MMC_ERR_INVALID; + cmd->error = -EINVAL; goto done; }; @@ -819,7 +818,7 @@ static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq) if (cmd->data) { wbsd_prepare_data(host, cmd->data); - if (cmd->data->error != MMC_ERR_NONE) + if (cmd->data->error) goto done; } @@ -830,7 +829,7 @@ static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq) * will be finished after the data has * transfered. */ - if (cmd->data && (cmd->error == MMC_ERR_NONE)) { + if (cmd->data && !cmd->error) { /* * Dirty fix for hardware bug. */ @@ -1033,7 +1032,7 @@ static void wbsd_tasklet_card(unsigned long param) mmc_hostname(host->mmc)); wbsd_reset(host); - host->mrq->cmd->error = MMC_ERR_FAILED; + host->mrq->cmd->error = -ENOMEDIUM; tasklet_schedule(&host->finish_tasklet); } @@ -1097,7 +1096,7 @@ static void wbsd_tasklet_crc(unsigned long param) DBGF("CRC error\n"); - data->error = MMC_ERR_BADCRC; + data->error = -EILSEQ; tasklet_schedule(&host->finish_tasklet); @@ -1121,7 +1120,7 @@ static void wbsd_tasklet_timeout(unsigned long param) DBGF("Timeout\n"); - data->error = MMC_ERR_TIMEOUT; + data->error = -ETIMEDOUT; tasklet_schedule(&host->finish_tasklet); @@ -1220,7 +1219,7 @@ static int __devinit wbsd_alloc_mmc(struct device *dev) mmc->f_min = 375000; mmc->f_max = 24000000; mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; - mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE | MMC_CAP_BYTEBLOCK; + mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE; spin_lock_init(&host->lock); diff --git a/include/asm-arm/arch-imx/mmc.h b/include/asm-arm/arch-imx/mmc.h index 84c7269..4712f35 100644 --- a/include/asm-arm/arch-imx/mmc.h +++ b/include/asm-arm/arch-imx/mmc.h @@ -3,8 +3,11 @@ #include <linux/mmc/host.h> +struct device; + struct imxmmc_platform_data { - int (*card_present)(void); + int (*card_present)(struct device *); + int (*get_ro)(struct device *); }; extern void imx_set_mmc_info(struct imxmmc_platform_data *info); diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index badf702..0d508ac 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -55,7 +55,28 @@ struct sd_switch_caps { unsigned int hs_max_dtr; }; +struct sdio_cccr { + unsigned int sdio_vsn; + unsigned int sd_vsn; + unsigned int multi_block:1, + low_speed:1, + wide_bus:1, + high_power:1, + high_speed:1; +}; + +struct sdio_cis { + unsigned short vendor; + unsigned short device; + unsigned short blksize; + unsigned int max_dtr; +}; + struct mmc_host; +struct sdio_func; +struct sdio_func_tuple; + +#define SDIO_MAX_FUNCS 7 /* * MMC device @@ -67,11 +88,13 @@ struct mmc_card { unsigned int type; /* card type */ #define MMC_TYPE_MMC 0 /* MMC card */ #define MMC_TYPE_SD 1 /* SD card */ +#define MMC_TYPE_SDIO 2 /* SDIO card */ unsigned int state; /* (our) card state */ #define MMC_STATE_PRESENT (1<<0) /* present in sysfs */ #define MMC_STATE_READONLY (1<<1) /* card is read-only */ #define MMC_STATE_HIGHSPEED (1<<2) /* card is in high speed mode */ #define MMC_STATE_BLOCKADDR (1<<3) /* card uses block-addressing */ + u32 raw_cid[4]; /* raw card CID */ u32 raw_csd[4]; /* raw card CSD */ u32 raw_scr[2]; /* raw card SCR */ @@ -80,10 +103,19 @@ struct mmc_card { struct mmc_ext_csd ext_csd; /* mmc v4 extended card specific */ struct sd_scr scr; /* extra SD information */ struct sd_switch_caps sw_caps; /* switch (CMD6) caps */ + + unsigned int sdio_funcs; /* number of SDIO functions */ + struct sdio_cccr cccr; /* common card info */ + struct sdio_cis cis; /* common tuple info */ + struct sdio_func *sdio_func[SDIO_MAX_FUNCS]; /* SDIO functions (devices) */ + unsigned num_info; /* number of info strings */ + const char **info; /* info strings */ + struct sdio_func_tuple *tuples; /* unknown common tuples */ }; #define mmc_card_mmc(c) ((c)->type == MMC_TYPE_MMC) #define mmc_card_sd(c) ((c)->type == MMC_TYPE_SD) +#define mmc_card_sdio(c) ((c)->type == MMC_TYPE_SDIO) #define mmc_card_present(c) ((c)->state & MMC_STATE_PRESENT) #define mmc_card_readonly(c) ((c)->state & MMC_STATE_READONLY) diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h index 63a80ea..d0c3abe 100644 --- a/include/linux/mmc/core.h +++ b/include/linux/mmc/core.h @@ -25,14 +25,20 @@ struct mmc_command { #define MMC_RSP_CRC (1 << 2) /* expect valid crc */ #define MMC_RSP_BUSY (1 << 3) /* card may send busy */ #define MMC_RSP_OPCODE (1 << 4) /* response contains opcode */ -#define MMC_CMD_MASK (3 << 5) /* command type */ + +#define MMC_CMD_MASK (3 << 5) /* non-SPI command type */ #define MMC_CMD_AC (0 << 5) #define MMC_CMD_ADTC (1 << 5) #define MMC_CMD_BC (2 << 5) #define MMC_CMD_BCR (3 << 5) +#define MMC_RSP_SPI_S1 (1 << 7) /* one status byte */ +#define MMC_RSP_SPI_S2 (1 << 8) /* second byte */ +#define MMC_RSP_SPI_B4 (1 << 9) /* four data bytes */ +#define MMC_RSP_SPI_BUSY (1 << 10) /* card may send busy */ + /* - * These are the response types, and correspond to valid bit + * These are the native response types, and correspond to valid bit * patterns of the above flags. One additional valid pattern * is all zeros, which means we don't expect a response. */ @@ -41,12 +47,30 @@ struct mmc_command { #define MMC_RSP_R1B (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY) #define MMC_RSP_R2 (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC) #define MMC_RSP_R3 (MMC_RSP_PRESENT) +#define MMC_RSP_R4 (MMC_RSP_PRESENT) +#define MMC_RSP_R5 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) #define MMC_RSP_R6 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) #define MMC_RSP_R7 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) #define mmc_resp_type(cmd) ((cmd)->flags & (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC|MMC_RSP_BUSY|MMC_RSP_OPCODE)) /* + * These are the SPI response types for MMC, SD, and SDIO cards. + * Commands return R1, with maybe more info. Zero is an error type; + * callers must always provide the appropriate MMC_RSP_SPI_Rx flags. + */ +#define MMC_RSP_SPI_R1 (MMC_RSP_SPI_S1) +#define MMC_RSP_SPI_R1B (MMC_RSP_SPI_S1|MMC_RSP_SPI_BUSY) +#define MMC_RSP_SPI_R2 (MMC_RSP_SPI_S1|MMC_RSP_SPI_S2) +#define MMC_RSP_SPI_R3 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4) +#define MMC_RSP_SPI_R4 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4) +#define MMC_RSP_SPI_R5 (MMC_RSP_SPI_S1|MMC_RSP_SPI_S2) +#define MMC_RSP_SPI_R7 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4) + +#define mmc_spi_resp_type(cmd) ((cmd)->flags & \ + (MMC_RSP_SPI_S1|MMC_RSP_SPI_BUSY|MMC_RSP_SPI_S2|MMC_RSP_SPI_B4)) + +/* * These are the command types. */ #define mmc_cmd_type(cmd) ((cmd)->flags & MMC_CMD_MASK) @@ -54,12 +78,19 @@ struct mmc_command { unsigned int retries; /* max number of retries */ unsigned int error; /* command error */ -#define MMC_ERR_NONE 0 -#define MMC_ERR_TIMEOUT 1 -#define MMC_ERR_BADCRC 2 -#define MMC_ERR_FIFO 3 -#define MMC_ERR_FAILED 4 -#define MMC_ERR_INVALID 5 +/* + * Standard errno values are used for errors, but some have specific + * meaning in the MMC layer: + * + * ETIMEDOUT Card took too long to respond + * EILSEQ Basic format problem with the received or sent data + * (e.g. CRC check failed, incorrect opcode in response + * or bad end bit) + * EINVAL Request cannot be performed because of restrictions + * in hardware and/or the driver + * ENOMEDIUM Host can determine that the slot is empty and is + * actively failing requests + */ struct mmc_data *data; /* data segment associated with cmd */ struct mmc_request *mrq; /* associated request */ @@ -76,7 +107,6 @@ struct mmc_data { #define MMC_DATA_WRITE (1 << 8) #define MMC_DATA_READ (1 << 9) #define MMC_DATA_STREAM (1 << 10) -#define MMC_DATA_MULTI (1 << 11) unsigned int bytes_xfered; @@ -104,9 +134,20 @@ extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int); extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *, struct mmc_command *, int); -extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *, int); +extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *); -extern void mmc_claim_host(struct mmc_host *host); +extern int __mmc_claim_host(struct mmc_host *host, atomic_t *abort); extern void mmc_release_host(struct mmc_host *host); +/** + * mmc_claim_host - exclusively claim a host + * @host: mmc host to claim + * + * Claim a host for a set of operations. + */ +static inline void mmc_claim_host(struct mmc_host *host) +{ + __mmc_claim_host(host, NULL); +} + #endif diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index b1350df..125eee1 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -10,6 +10,8 @@ #ifndef LINUX_MMC_HOST_H #define LINUX_MMC_HOST_H +#include <linux/leds.h> + #include <linux/mmc/core.h> struct mmc_ios { @@ -51,6 +53,7 @@ struct mmc_host_ops { void (*request)(struct mmc_host *host, struct mmc_request *req); void (*set_ios)(struct mmc_host *host, struct mmc_ios *ios); int (*get_ro)(struct mmc_host *host); + void (*enable_sdio_irq)(struct mmc_host *host, int enable); }; struct mmc_card; @@ -87,9 +90,10 @@ struct mmc_host { #define MMC_CAP_4_BIT_DATA (1 << 0) /* Can the host do 4 bit transfers */ #define MMC_CAP_MULTIWRITE (1 << 1) /* Can accurately report bytes sent to card on error */ -#define MMC_CAP_BYTEBLOCK (1 << 2) /* Can do non-log2 block sizes */ -#define MMC_CAP_MMC_HIGHSPEED (1 << 3) /* Can do MMC high-speed timing */ -#define MMC_CAP_SD_HIGHSPEED (1 << 4) /* Can do SD high-speed timing */ +#define MMC_CAP_MMC_HIGHSPEED (1 << 2) /* Can do MMC high-speed timing */ +#define MMC_CAP_SD_HIGHSPEED (1 << 3) /* Can do SD high-speed timing */ +#define MMC_CAP_SDIO_IRQ (1 << 4) /* Can signal pending SDIO IRQs */ +#define MMC_CAP_SPI (1 << 5) /* Talks only SPI protocols */ /* host specific block data */ unsigned int max_seg_size; /* see blk_queue_max_segment_size */ @@ -106,6 +110,14 @@ struct mmc_host { struct mmc_ios ios; /* current io bus settings */ u32 ocr; /* the current OCR setting */ + /* group bitfields together to minimize padding */ + unsigned int use_spi_crc:1; + unsigned int claimed:1; /* host exclusively claimed */ + unsigned int bus_dead:1; /* bus has been released */ +#ifdef CONFIG_MMC_DEBUG + unsigned int removed:1; /* host is being removed */ +#endif + unsigned int mode; /* current card mode of host */ #define MMC_MODE_MMC 0 #define MMC_MODE_SD 1 @@ -113,16 +125,19 @@ struct mmc_host { struct mmc_card *card; /* device attached to this host */ wait_queue_head_t wq; - unsigned int claimed:1; /* host exclusively claimed */ struct delayed_work detect; -#ifdef CONFIG_MMC_DEBUG - unsigned int removed:1; /* host is being removed */ -#endif const struct mmc_bus_ops *bus_ops; /* current bus driver */ unsigned int bus_refs; /* reference counter */ - unsigned int bus_dead:1; /* bus has been released */ + + unsigned int sdio_irqs; + struct task_struct *sdio_irq_thread; + atomic_t sdio_irq_thread_abort; + +#ifdef CONFIG_LEDS_TRIGGERS + struct led_trigger *led; /* activity led */ +#endif unsigned long private[0] ____cacheline_aligned; }; @@ -137,6 +152,8 @@ static inline void *mmc_priv(struct mmc_host *host) return (void *)host->private; } +#define mmc_host_is_spi(host) ((host)->caps & MMC_CAP_SPI) + #define mmc_dev(x) ((x)->parent) #define mmc_classdev(x) (&(x)->class_dev) #define mmc_hostname(x) ((x)->class_dev.bus_id) @@ -147,5 +164,11 @@ extern int mmc_resume_host(struct mmc_host *); extern void mmc_detect_change(struct mmc_host *, unsigned long delay); extern void mmc_request_done(struct mmc_host *, struct mmc_request *); +static inline void mmc_signal_sdio_irq(struct mmc_host *host) +{ + host->ops->enable_sdio_irq(host, 0); + wake_up_process(host->sdio_irq_thread); +} + #endif diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h index e3ed9b9..4236fbf 100644 --- a/include/linux/mmc/mmc.h +++ b/include/linux/mmc/mmc.h @@ -27,7 +27,7 @@ /* Standard MMC commands (4.1) type argument response */ /* class 1 */ -#define MMC_GO_IDLE_STATE 0 /* bc */ +#define MMC_GO_IDLE_STATE 0 /* bc */ #define MMC_SEND_OP_COND 1 /* bcr [31:0] OCR R3 */ #define MMC_ALL_SEND_CID 2 /* bcr R2 */ #define MMC_SET_RELATIVE_ADDR 3 /* ac [31:16] RCA R1 */ @@ -39,8 +39,10 @@ #define MMC_SEND_CID 10 /* ac [31:16] RCA R2 */ #define MMC_READ_DAT_UNTIL_STOP 11 /* adtc [31:0] dadr R1 */ #define MMC_STOP_TRANSMISSION 12 /* ac R1b */ -#define MMC_SEND_STATUS 13 /* ac [31:16] RCA R1 */ +#define MMC_SEND_STATUS 13 /* ac [31:16] RCA R1 */ #define MMC_GO_INACTIVE_STATE 15 /* ac [31:16] RCA */ +#define MMC_SPI_READ_OCR 58 /* spi spi_R3 */ +#define MMC_SPI_CRC_ON_OFF 59 /* spi [0:0] flag spi_R1 */ /* class 2 */ #define MMC_SET_BLOCKLEN 16 /* ac [31:0] block len R1 */ @@ -90,15 +92,15 @@ */ /* - MMC status in R1 + MMC status in R1, for native mode (SPI bits are different) Type - e : error bit + e : error bit s : status bit r : detected and set for the actual command response x : detected and set during command execution. the host must poll the card by sending status command in order to read these bits. Clear condition - a : according to the card state + a : according to the card state b : always related to the previous command. Reception of a valid command will clear it (with a delay of one command) c : clear by read @@ -124,10 +126,33 @@ #define R1_CARD_ECC_DISABLED (1 << 14) /* sx, a */ #define R1_ERASE_RESET (1 << 13) /* sr, c */ #define R1_STATUS(x) (x & 0xFFFFE000) -#define R1_CURRENT_STATE(x) ((x & 0x00001E00) >> 9) /* sx, b (4 bits) */ +#define R1_CURRENT_STATE(x) ((x & 0x00001E00) >> 9) /* sx, b (4 bits) */ #define R1_READY_FOR_DATA (1 << 8) /* sx, a */ #define R1_APP_CMD (1 << 5) /* sr, c */ +/* + * MMC/SD in SPI mode reports R1 status always, and R2 for SEND_STATUS + * R1 is the low order byte; R2 is the next highest byte, when present. + */ +#define R1_SPI_IDLE (1 << 0) +#define R1_SPI_ERASE_RESET (1 << 1) +#define R1_SPI_ILLEGAL_COMMAND (1 << 2) +#define R1_SPI_COM_CRC (1 << 3) +#define R1_SPI_ERASE_SEQ (1 << 4) +#define R1_SPI_ADDRESS (1 << 5) +#define R1_SPI_PARAMETER (1 << 6) +/* R1 bit 7 is always zero */ +#define R2_SPI_CARD_LOCKED (1 << 8) +#define R2_SPI_WP_ERASE_SKIP (1 << 9) /* or lock/unlock fail */ +#define R2_SPI_LOCK_UNLOCK_FAIL R2_SPI_WP_ERASE_SKIP +#define R2_SPI_ERROR (1 << 10) +#define R2_SPI_CC_ERROR (1 << 11) +#define R2_SPI_CARD_ECC_ERROR (1 << 12) +#define R2_SPI_WP_VIOLATION (1 << 13) +#define R2_SPI_ERASE_PARAM (1 << 14) +#define R2_SPI_OUT_OF_RANGE (1 << 15) /* or CSD overwrite */ +#define R2_SPI_CSD_OVERWRITE R2_SPI_OUT_OF_RANGE + /* These are unpacked versions of the actual responses */ struct _mmc_csd { @@ -182,6 +207,7 @@ struct _mmc_csd { */ #define CCC_BASIC (1<<0) /* (0) Basic protocol functions */ /* (CMD0,1,2,3,4,7,9,10,12,13,15) */ + /* (and for SPI, CMD58,59) */ #define CCC_STREAM_READ (1<<1) /* (1) Stream read commands */ /* (CMD11) */ #define CCC_BLOCK_READ (1<<2) /* (2) Block read commands */ @@ -227,6 +253,7 @@ struct _mmc_csd { #define EXT_CSD_BUS_WIDTH 183 /* R/W */ #define EXT_CSD_HS_TIMING 185 /* R/W */ #define EXT_CSD_CARD_TYPE 196 /* RO */ +#define EXT_CSD_REV 192 /* RO */ #define EXT_CSD_SEC_CNT 212 /* RO, 4 bytes */ /* diff --git a/include/linux/mmc/sdio.h b/include/linux/mmc/sdio.h new file mode 100644 index 0000000..47ba464 --- /dev/null +++ b/include/linux/mmc/sdio.h @@ -0,0 +1,159 @@ +/* + * include/linux/mmc/sdio.h + * + * Copyright 2006-2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#ifndef MMC_SDIO_H +#define MMC_SDIO_H + +/* SDIO commands type argument response */ +#define SD_IO_SEND_OP_COND 5 /* bcr [23:0] OCR R4 */ +#define SD_IO_RW_DIRECT 52 /* ac [31:0] See below R5 */ +#define SD_IO_RW_EXTENDED 53 /* adtc [31:0] See below R5 */ + +/* + * SD_IO_RW_DIRECT argument format: + * + * [31] R/W flag + * [30:28] Function number + * [27] RAW flag + * [25:9] Register address + * [7:0] Data + */ + +/* + * SD_IO_RW_EXTENDED argument format: + * + * [31] R/W flag + * [30:28] Function number + * [27] Block mode + * [26] Increment address + * [25:9] Register address + * [8:0] Byte/block count + */ + +/* + SDIO status in R5 + Type + e : error bit + s : status bit + r : detected and set for the actual command response + x : detected and set during command execution. the host must poll + the card by sending status command in order to read these bits. + Clear condition + a : according to the card state + b : always related to the previous command. Reception of + a valid command will clear it (with a delay of one command) + c : clear by read + */ + +#define R5_COM_CRC_ERROR (1 << 15) /* er, b */ +#define R5_ILLEGAL_COMMAND (1 << 14) /* er, b */ +#define R5_ERROR (1 << 11) /* erx, c */ +#define R5_FUNCTION_NUMBER (1 << 9) /* er, c */ +#define R5_OUT_OF_RANGE (1 << 8) /* er, c */ +#define R5_STATUS(x) (x & 0xCB00) +#define R5_IO_CURRENT_STATE(x) ((x & 0x3000) >> 12) /* s, b */ + +/* + * Card Common Control Registers (CCCR) + */ + +#define SDIO_CCCR_CCCR 0x00 + +#define SDIO_CCCR_REV_1_00 0 /* CCCR/FBR Version 1.00 */ +#define SDIO_CCCR_REV_1_10 1 /* CCCR/FBR Version 1.10 */ +#define SDIO_CCCR_REV_1_20 2 /* CCCR/FBR Version 1.20 */ + +#define SDIO_SDIO_REV_1_00 0 /* SDIO Spec Version 1.00 */ +#define SDIO_SDIO_REV_1_10 1 /* SDIO Spec Version 1.10 */ +#define SDIO_SDIO_REV_1_20 2 /* SDIO Spec Version 1.20 */ +#define SDIO_SDIO_REV_2_00 3 /* SDIO Spec Version 2.00 */ + +#define SDIO_CCCR_SD 0x01 + +#define SDIO_SD_REV_1_01 0 /* SD Physical Spec Version 1.01 */ +#define SDIO_SD_REV_1_10 1 /* SD Physical Spec Version 1.10 */ +#define SDIO_SD_REV_2_00 2 /* SD Physical Spec Version 2.00 */ + +#define SDIO_CCCR_IOEx 0x02 +#define SDIO_CCCR_IORx 0x03 + +#define SDIO_CCCR_IENx 0x04 /* Function/Master Interrupt Enable */ +#define SDIO_CCCR_INTx 0x05 /* Function Interrupt Pending */ + +#define SDIO_CCCR_ABORT 0x06 /* function abort/card reset */ + +#define SDIO_CCCR_IF 0x07 /* bus interface controls */ + +#define SDIO_BUS_WIDTH_1BIT 0x00 +#define SDIO_BUS_WIDTH_4BIT 0x02 + +#define SDIO_BUS_CD_DISABLE 0x80 /* disable pull-up on DAT3 (pin 1) */ + +#define SDIO_CCCR_CAPS 0x08 + +#define SDIO_CCCR_CAP_SDC 0x01 /* can do CMD52 while data transfer */ +#define SDIO_CCCR_CAP_SMB 0x02 /* can do multi-block xfers (CMD53) */ +#define SDIO_CCCR_CAP_SRW 0x04 /* supports read-wait protocol */ +#define SDIO_CCCR_CAP_SBS 0x08 /* supports suspend/resume */ +#define SDIO_CCCR_CAP_S4MI 0x10 /* interrupt during 4-bit CMD53 */ +#define SDIO_CCCR_CAP_E4MI 0x20 /* enable ints during 4-bit CMD53 */ +#define SDIO_CCCR_CAP_LSC 0x40 /* low speed card */ +#define SDIO_CCCR_CAP_4BLS 0x80 /* 4 bit low speed card */ + +#define SDIO_CCCR_CIS 0x09 /* common CIS pointer (3 bytes) */ + +/* Following 4 regs are valid only if SBS is set */ +#define SDIO_CCCR_SUSPEND 0x0c +#define SDIO_CCCR_SELx 0x0d +#define SDIO_CCCR_EXECx 0x0e +#define SDIO_CCCR_READYx 0x0f + +#define SDIO_CCCR_BLKSIZE 0x10 + +#define SDIO_CCCR_POWER 0x12 + +#define SDIO_POWER_SMPC 0x01 /* Supports Master Power Control */ +#define SDIO_POWER_EMPC 0x02 /* Enable Master Power Control */ + +#define SDIO_CCCR_SPEED 0x13 + +#define SDIO_SPEED_SHS 0x01 /* Supports High-Speed mode */ +#define SDIO_SPEED_EHS 0x02 /* Enable High-Speed mode */ + +/* + * Function Basic Registers (FBR) + */ + +#define SDIO_FBR_BASE(f) ((f) * 0x100) /* base of function f's FBRs */ + +#define SDIO_FBR_STD_IF 0x00 + +#define SDIO_FBR_SUPPORTS_CSA 0x40 /* supports Code Storage Area */ +#define SDIO_FBR_ENABLE_CSA 0x80 /* enable Code Storage Area */ + +#define SDIO_FBR_STD_IF_EXT 0x01 + +#define SDIO_FBR_POWER 0x02 + +#define SDIO_FBR_POWER_SPS 0x01 /* Supports Power Selection */ +#define SDIO_FBR_POWER_EPS 0x02 /* Enable (low) Power Selection */ + +#define SDIO_FBR_CIS 0x09 /* CIS pointer (3 bytes) */ + + +#define SDIO_FBR_CSA 0x0C /* CSA pointer (3 bytes) */ + +#define SDIO_FBR_CSA_DATA 0x0F + +#define SDIO_FBR_BLKSIZE 0x10 /* block size (2 bytes) */ + +#endif + diff --git a/include/linux/mmc/sdio_func.h b/include/linux/mmc/sdio_func.h new file mode 100644 index 0000000..b050f4d --- /dev/null +++ b/include/linux/mmc/sdio_func.h @@ -0,0 +1,153 @@ +/* + * include/linux/mmc/sdio_func.h + * + * Copyright 2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#ifndef MMC_SDIO_FUNC_H +#define MMC_SDIO_FUNC_H + +#include <linux/device.h> +#include <linux/mod_devicetable.h> + +struct mmc_card; +struct sdio_func; + +typedef void (sdio_irq_handler_t)(struct sdio_func *); + +/* + * SDIO function CIS tuple (unknown to the core) + */ +struct sdio_func_tuple { + struct sdio_func_tuple *next; + unsigned char code; + unsigned char size; + unsigned char data[0]; +}; + +/* + * SDIO function devices + */ +struct sdio_func { + struct mmc_card *card; /* the card this device belongs to */ + struct device dev; /* the device */ + sdio_irq_handler_t *irq_handler; /* IRQ callback */ + unsigned int num; /* function number */ + + unsigned char class; /* standard interface class */ + unsigned short vendor; /* vendor id */ + unsigned short device; /* device id */ + + unsigned max_blksize; /* maximum block size */ + unsigned cur_blksize; /* current block size */ + + unsigned int state; /* function state */ +#define SDIO_STATE_PRESENT (1<<0) /* present in sysfs */ + + u8 tmpbuf[4]; /* DMA:able scratch buffer */ + + unsigned num_info; /* number of info strings */ + const char **info; /* info strings */ + + struct sdio_func_tuple *tuples; +}; + +#define sdio_func_present(f) ((f)->state & SDIO_STATE_PRESENT) + +#define sdio_func_set_present(f) ((f)->state |= SDIO_STATE_PRESENT) + +#define sdio_func_id(f) ((f)->dev.bus_id) + +#define sdio_get_drvdata(f) dev_get_drvdata(&(f)->dev) +#define sdio_set_drvdata(f,d) dev_set_drvdata(&(f)->dev, d) + +/* + * SDIO function device driver + */ +struct sdio_driver { + char *name; + const struct sdio_device_id *id_table; + + int (*probe)(struct sdio_func *, const struct sdio_device_id *); + void (*remove)(struct sdio_func *); + + struct device_driver drv; +}; + +/** + * SDIO_DEVICE - macro used to describe a specific SDIO device + * @vend: the 16 bit manufacturer code + * @dev: the 16 bit function id + * + * This macro is used to create a struct sdio_device_id that matches a + * specific device. The class field will be set to SDIO_ANY_ID. + */ +#define SDIO_DEVICE(vend,dev) \ + .class = SDIO_ANY_ID, \ + .vendor = (vend), .device = (dev) + +/** + * SDIO_DEVICE_CLASS - macro used to describe a specific SDIO device class + * @dev_class: the 8 bit standard interface code + * + * This macro is used to create a struct sdio_device_id that matches a + * specific standard SDIO function type. The vendor and device fields will + * be set to SDIO_ANY_ID. + */ +#define SDIO_DEVICE_CLASS(dev_class) \ + .class = (dev_class), \ + .vendor = SDIO_ANY_ID, .device = SDIO_ANY_ID + +extern int sdio_register_driver(struct sdio_driver *); +extern void sdio_unregister_driver(struct sdio_driver *); + +/* + * SDIO I/O operations + */ +extern void sdio_claim_host(struct sdio_func *func); +extern void sdio_release_host(struct sdio_func *func); + +extern int sdio_enable_func(struct sdio_func *func); +extern int sdio_disable_func(struct sdio_func *func); + +extern int sdio_set_block_size(struct sdio_func *func, unsigned blksz); + +extern int sdio_claim_irq(struct sdio_func *func, sdio_irq_handler_t *handler); +extern int sdio_release_irq(struct sdio_func *func); + +extern unsigned char sdio_readb(struct sdio_func *func, + unsigned int addr, int *err_ret); +extern unsigned short sdio_readw(struct sdio_func *func, + unsigned int addr, int *err_ret); +extern unsigned long sdio_readl(struct sdio_func *func, + unsigned int addr, int *err_ret); + +extern int sdio_memcpy_fromio(struct sdio_func *func, void *dst, + unsigned int addr, int count); +extern int sdio_readsb(struct sdio_func *func, void *dst, + unsigned int addr, int count); + +extern void sdio_writeb(struct sdio_func *func, unsigned char b, + unsigned int addr, int *err_ret); +extern void sdio_writew(struct sdio_func *func, unsigned short b, + unsigned int addr, int *err_ret); +extern void sdio_writel(struct sdio_func *func, unsigned long b, + unsigned int addr, int *err_ret); + +extern int sdio_memcpy_toio(struct sdio_func *func, unsigned int addr, + void *src, int count); +extern int sdio_writesb(struct sdio_func *func, unsigned int addr, + void *src, int count); + +extern unsigned char sdio_f0_readb(struct sdio_func *func, + unsigned int addr, int *err_ret); +extern void sdio_f0_writeb(struct sdio_func *func, unsigned char b, + unsigned int addr, int *err_ret); + +#endif + diff --git a/include/linux/mmc/sdio_ids.h b/include/linux/mmc/sdio_ids.h new file mode 100644 index 0000000..09306d4 --- /dev/null +++ b/include/linux/mmc/sdio_ids.h @@ -0,0 +1,23 @@ +/* + * SDIO Classes, Interface Types, Manufacturer IDs, etc. + */ + +#ifndef MMC_SDIO_IDS_H +#define MMC_SDIO_IDS_H + +/* + * Standard SDIO Function Interfaces + */ + +#define SDIO_CLASS_NONE 0x00 /* Not a SDIO standard interface */ +#define SDIO_CLASS_UART 0x01 /* standard UART interface */ +#define SDIO_CLASS_BT_A 0x02 /* Type-A BlueTooth std interface */ +#define SDIO_CLASS_BT_B 0x03 /* Type-B BlueTooth std interface */ +#define SDIO_CLASS_GPS 0x04 /* GPS standard interface */ +#define SDIO_CLASS_CAMERA 0x05 /* Camera standard interface */ +#define SDIO_CLASS_PHS 0x06 /* PHS standard interface */ +#define SDIO_CLASS_WLAN 0x07 /* WLAN interface */ +#define SDIO_CLASS_ATA 0x08 /* Embedded SDIO-ATA std interface */ + + +#endif diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h index 4dc5fa8..e47e595 100644 --- a/include/linux/mod_devicetable.h +++ b/include/linux/mod_devicetable.h @@ -340,4 +340,15 @@ struct parisc_device_id { #define PA_HVERSION_ANY_ID 0xffff #define PA_SVERSION_ANY_ID 0xffffffff +/* SDIO */ + +#define SDIO_ANY_ID (~0) + +struct sdio_device_id { + __u8 class; /* Standard interface or SDIO_ANY_ID */ + __u16 vendor; /* Vendor or SDIO_ANY_ID */ + __u16 device; /* Device ID or SDIO_ANY_ID */ + kernel_ulong_t driver_data; /* Data private to the driver */ +}; + #endif /* LINUX_MOD_DEVICETABLE_H */ diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index 55f307f..c8636bb 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -1471,6 +1471,8 @@ #define PCI_DEVICE_ID_RICOH_RL5C476 0x0476 #define PCI_DEVICE_ID_RICOH_RL5C478 0x0478 #define PCI_DEVICE_ID_RICOH_R5C822 0x0822 +#define PCI_DEVICE_ID_RICOH_R5C832 0x0832 +#define PCI_DEVICE_ID_RICOH_R5C843 0x0843 #define PCI_VENDOR_ID_DLINK 0x1186 #define PCI_DEVICE_ID_DLINK_DGE510T 0x4c00 diff --git a/include/linux/spi/mmc_spi.h b/include/linux/spi/mmc_spi.h new file mode 100644 index 0000000..e9bbe3e --- /dev/null +++ b/include/linux/spi/mmc_spi.h @@ -0,0 +1,33 @@ +#ifndef __LINUX_SPI_MMC_SPI_H +#define __LINUX_SPI_MMC_SPI_H + +struct device; +struct mmc_host; + +/* Put this in platform_data of a device being used to manage an MMC/SD + * card slot. (Modeled after PXA mmc glue; see that for usage examples.) + * + * REVISIT This is not a spi-specific notion. Any card slot should be + * able to handle it. If the MMC core doesn't adopt this kind of notion, + * switch the "struct device *" parameters over to "struct spi_device *". + */ +struct mmc_spi_platform_data { + /* driver activation and (optional) card detect irq hookup */ + int (*init)(struct device *, + irqreturn_t (*)(int, void *), + void *); + void (*exit)(struct device *, void *); + + /* sense switch on sd cards */ + int (*get_ro)(struct device *); + + /* how long to debounce card detect, in msecs */ + u16 detect_delay; + + /* power management */ + u16 powerup_msecs; /* delay of up to 250 msec */ + u32 ocr_mask; /* available voltages */ + void (*setpower)(struct device *, unsigned int maskval); +}; + +#endif /* __LINUX_SPI_MMC_SPI_H */ diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index 8a09021..1e5d4d69 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -484,6 +484,22 @@ static int do_parisc_entry(const char *filename, struct parisc_device_id *id, return 1; } +/* Looks like: sdio:cNvNdN. */ +static int do_sdio_entry(const char *filename, + struct sdio_device_id *id, char *alias) +{ + id->class = TO_NATIVE(id->class); + id->vendor = TO_NATIVE(id->vendor); + id->device = TO_NATIVE(id->device); + + strcpy(alias, "sdio:"); + ADD(alias, "c", id->class != (__u8)SDIO_ANY_ID, id->class); + ADD(alias, "v", id->vendor != (__u16)SDIO_ANY_ID, id->vendor); + ADD(alias, "d", id->device != (__u16)SDIO_ANY_ID, id->device); + + return 1; +} + /* Ignore any prefix, eg. v850 prepends _ */ static inline int sym_is(const char *symbol, const char *name) { @@ -599,6 +615,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info, do_table(symval, sym->st_size, sizeof(struct parisc_device_id), "parisc", do_parisc_entry, mod); + else if (sym_is(symname, "__mod_sdio_device_table")) + do_table(symval, sym->st_size, + sizeof(struct sdio_device_id), "sdio", + do_sdio_entry, mod); } /* Now add out buffered information to the generated C source */ |
