diff options
34 files changed, 1152 insertions, 230 deletions
diff --git a/Documentation/devicetree/bindings/tty/serial/efm32-uart.txt b/Documentation/devicetree/bindings/tty/serial/efm32-uart.txt new file mode 100644 index 0000000..6588b69 --- /dev/null +++ b/Documentation/devicetree/bindings/tty/serial/efm32-uart.txt @@ -0,0 +1,14 @@ +* Energymicro efm32 UART + +Required properties: +- compatible : Should be "efm32,uart" +- reg : Address and length of the register set +- interrupts : Should contain uart interrupt + +Example: + +uart@0x4000c400 { + compatible = "efm32,uart"; + reg = <0x4000c400 0x400>; + interrupts = <15>; +}; diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c index e44933d..94948be 100644 --- a/drivers/isdn/capi/capi.c +++ b/drivers/isdn/capi/capi.c @@ -1015,14 +1015,11 @@ capinc_tty_install(struct tty_driver *driver, struct tty_struct *tty) { int idx = tty->index; struct capiminor *mp = capiminor_get(idx); - int ret = tty_init_termios(tty); + int ret = tty_standard_install(driver, tty); - if (ret == 0) { - tty_driver_kref_get(driver); - tty->count++; + if (ret == 0) tty->driver_data = mp; - driver->ttys[idx] = tty; - } else + else capiminor_put(mp); return ret; } diff --git a/drivers/misc/pti.c b/drivers/misc/pti.c index 0b56e3f..471ff4c 100644 --- a/drivers/misc/pti.c +++ b/drivers/misc/pti.c @@ -481,13 +481,9 @@ static int pti_tty_install(struct tty_driver *driver, struct tty_struct *tty) { int idx = tty->index; struct pti_tty *pti_tty_data; - int ret = tty_init_termios(tty); + int ret = tty_standard_install(driver, tty); if (ret == 0) { - tty_driver_kref_get(driver); - tty->count++; - driver->ttys[idx] = tty; - pti_tty_data = kmalloc(sizeof(struct pti_tty), GFP_KERNEL); if (pti_tty_data == NULL) return -ENOMEM; diff --git a/drivers/mmc/card/sdio_uart.c b/drivers/mmc/card/sdio_uart.c index 2c151e1..bd4a67c 100644 --- a/drivers/mmc/card/sdio_uart.c +++ b/drivers/mmc/card/sdio_uart.c @@ -750,15 +750,12 @@ static int sdio_uart_install(struct tty_driver *driver, struct tty_struct *tty) { int idx = tty->index; struct sdio_uart_port *port = sdio_uart_port_get(idx); - int ret = tty_init_termios(tty); + int ret = tty_standard_install(driver, tty); - if (ret == 0) { - tty_driver_kref_get(driver); - tty->count++; + if (ret == 0) /* This is the ref sdio_uart_port get provided */ tty->driver_data = port; - driver->ttys[idx] = tty; - } else + else sdio_uart_port_put(port); return ret; } diff --git a/drivers/tty/hvc/hvc_beat.c b/drivers/tty/hvc/hvc_beat.c index 5fe4631..1560d23 100644 --- a/drivers/tty/hvc/hvc_beat.c +++ b/drivers/tty/hvc/hvc_beat.c @@ -113,7 +113,7 @@ static int __init hvc_beat_init(void) if (!firmware_has_feature(FW_FEATURE_BEAT)) return -ENODEV; - hp = hvc_alloc(0, NO_IRQ, &hvc_beat_get_put_ops, 16); + hp = hvc_alloc(0, 0, &hvc_beat_get_put_ops, 16); if (IS_ERR(hp)) return PTR_ERR(hp); hvc_beat_dev = hp; diff --git a/drivers/tty/hvc/hvc_rtas.c b/drivers/tty/hvc/hvc_rtas.c index 61c4a61..0069bb8 100644 --- a/drivers/tty/hvc/hvc_rtas.c +++ b/drivers/tty/hvc/hvc_rtas.c @@ -94,7 +94,7 @@ static int __init hvc_rtas_init(void) /* Allocate an hvc_struct for the console device we instantiated * earlier. Save off hp so that we can return it on exit */ - hp = hvc_alloc(hvc_rtas_cookie, NO_IRQ, &hvc_rtas_get_put_ops, 16); + hp = hvc_alloc(hvc_rtas_cookie, 0, &hvc_rtas_get_put_ops, 16); if (IS_ERR(hp)) return PTR_ERR(hp); diff --git a/drivers/tty/hvc/hvc_udbg.c b/drivers/tty/hvc/hvc_udbg.c index b0957e6..4c9b13e 100644 --- a/drivers/tty/hvc/hvc_udbg.c +++ b/drivers/tty/hvc/hvc_udbg.c @@ -69,7 +69,7 @@ static int __init hvc_udbg_init(void) BUG_ON(hvc_udbg_dev); - hp = hvc_alloc(0, NO_IRQ, &hvc_udbg_ops, 16); + hp = hvc_alloc(0, 0, &hvc_udbg_ops, 16); if (IS_ERR(hp)) return PTR_ERR(hp); diff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c index 52fdf60..a1b0a75 100644 --- a/drivers/tty/hvc/hvc_xen.c +++ b/drivers/tty/hvc/hvc_xen.c @@ -176,7 +176,7 @@ static int __init xen_hvc_init(void) xencons_irq = bind_evtchn_to_irq(xen_start_info->console.domU.evtchn); } if (xencons_irq < 0) - xencons_irq = 0; /* NO_IRQ */ + xencons_irq = 0; else irq_set_noprobe(xencons_irq); diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c index b9040be..df7e7a0 100644 --- a/drivers/tty/hvc/hvcs.c +++ b/drivers/tty/hvc/hvcs.c @@ -1203,7 +1203,7 @@ static void hvcs_close(struct tty_struct *tty, struct file *filp) { struct hvcs_struct *hvcsd; unsigned long flags; - int irq = NO_IRQ; + int irq; /* * Is someone trying to close the file associated with this device after @@ -1264,7 +1264,7 @@ static void hvcs_hangup(struct tty_struct * tty) struct hvcs_struct *hvcsd = tty->driver_data; unsigned long flags; int temp_open_count; - int irq = NO_IRQ; + int irq; spin_lock_irqsave(&hvcsd->lock, flags); /* Preserve this so that we know how many kref refs to put */ diff --git a/drivers/tty/hvc/hvsi.c b/drivers/tty/hvc/hvsi.c index cdfa3e0..1b5f28b 100644 --- a/drivers/tty/hvc/hvsi.c +++ b/drivers/tty/hvc/hvsi.c @@ -1237,7 +1237,7 @@ static int __init hvsi_console_init(void) hp->state = HVSI_CLOSED; hp->vtermno = *vtermno; hp->virq = irq_create_mapping(NULL, irq[0]); - if (hp->virq == NO_IRQ) { + if (hp->virq == 0) { printk(KERN_ERR "%s: couldn't create irq mapping for 0x%x\n", __func__, irq[0]); continue; diff --git a/drivers/tty/nozomi.c b/drivers/tty/nozomi.c index fd347ff..580da78 100644 --- a/drivers/tty/nozomi.c +++ b/drivers/tty/nozomi.c @@ -1602,13 +1602,9 @@ static int ntty_install(struct tty_driver *driver, struct tty_struct *tty) int ret; if (!port || !dc || dc->state != NOZOMI_STATE_READY) return -ENODEV; - ret = tty_init_termios(tty); - if (ret == 0) { - tty_driver_kref_get(driver); - tty->count++; + ret = tty_standard_install(driver, tty); + if (ret == 0) tty->driver_data = port; - driver->ttys[tty->index] = tty; - } return ret; } diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index d8653ab..39afd04 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -21,7 +21,6 @@ #include <linux/major.h> #include <linux/mm.h> #include <linux/init.h> -#include <linux/sysctl.h> #include <linux/device.h> #include <linux/uaccess.h> #include <linux/bitops.h> @@ -55,11 +54,8 @@ static void pty_close(struct tty_struct *tty, struct file *filp) wake_up_interruptible(&tty->link->write_wait); if (tty->driver->subtype == PTY_TYPE_MASTER) { set_bit(TTY_OTHER_CLOSED, &tty->flags); -#ifdef CONFIG_UNIX98_PTYS - if (tty->driver == ptm_driver) - devpts_pty_kill(tty->link); -#endif tty_unlock(); + devpts_pty_kill(tty->link); tty_vhangup(tty->link); tty_lock(); } @@ -439,55 +435,9 @@ static inline void legacy_pty_init(void) { } /* Unix98 devices */ #ifdef CONFIG_UNIX98_PTYS -/* - * sysctl support for setting limits on the number of Unix98 ptys allocated. - * Otherwise one can eat up all kernel memory by opening /dev/ptmx repeatedly. - */ -int pty_limit = NR_UNIX98_PTY_DEFAULT; -static int pty_limit_min; -static int pty_limit_max = NR_UNIX98_PTY_MAX; -static int pty_count; static struct cdev ptmx_cdev; -static struct ctl_table pty_table[] = { - { - .procname = "max", - .maxlen = sizeof(int), - .mode = 0644, - .data = &pty_limit, - .proc_handler = proc_dointvec_minmax, - .extra1 = &pty_limit_min, - .extra2 = &pty_limit_max, - }, { - .procname = "nr", - .maxlen = sizeof(int), - .mode = 0444, - .data = &pty_count, - .proc_handler = proc_dointvec, - }, - {} -}; - -static struct ctl_table pty_kern_table[] = { - { - .procname = "pty", - .mode = 0555, - .child = pty_table, - }, - {} -}; - -static struct ctl_table pty_root_table[] = { - { - .procname = "kernel", - .mode = 0555, - .child = pty_kern_table, - }, - {} -}; - - static int pty_unix98_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg) { @@ -515,10 +465,8 @@ static int pty_unix98_ioctl(struct tty_struct *tty, static struct tty_struct *ptm_unix98_lookup(struct tty_driver *driver, struct inode *ptm_inode, int idx) { - struct tty_struct *tty = devpts_get_tty(ptm_inode, idx); - if (tty) - tty = tty->link; - return tty; + /* Master must be open via /dev/ptmx */ + return ERR_PTR(-EIO); } /** @@ -589,7 +537,6 @@ static int pty_unix98_install(struct tty_driver *driver, struct tty_struct *tty) */ tty_driver_kref_get(driver); tty->count++; - pty_count++; return 0; err_free_mem: deinitialize_tty_struct(o_tty); @@ -603,7 +550,6 @@ err_free_tty: static void ptm_unix98_remove(struct tty_driver *driver, struct tty_struct *tty) { - pty_count--; } static void pts_unix98_remove(struct tty_driver *driver, struct tty_struct *tty) @@ -667,9 +613,7 @@ static int ptmx_open(struct inode *inode, struct file *filp) return retval; /* find a device that is not in use. */ - tty_lock(); index = devpts_new_index(inode); - tty_unlock(); if (index < 0) { retval = index; goto err_file; @@ -677,7 +621,7 @@ static int ptmx_open(struct inode *inode, struct file *filp) mutex_lock(&tty_mutex); tty_lock(); - tty = tty_init_dev(ptm_driver, index, 1); + tty = tty_init_dev(ptm_driver, index); mutex_unlock(&tty_mutex); if (IS_ERR(tty)) { @@ -704,8 +648,8 @@ err_release: tty_release(inode, filp); return retval; out: - devpts_kill_index(inode, index); tty_unlock(); + devpts_kill_index(inode, index); err_file: tty_free_file(filp); return retval; @@ -762,8 +706,6 @@ static void __init unix98_pty_init(void) if (tty_register_driver(pts_driver)) panic("Couldn't register Unix98 pts driver"); - register_sysctl_table(pty_root_table); - /* Now create the /dev/ptmx special device */ tty_default_fops(&ptmx_fops); ptmx_fops.open = ptmx_open; diff --git a/drivers/tty/serial/21285.c b/drivers/tty/serial/21285.c index 1b37626..f899996 100644 --- a/drivers/tty/serial/21285.c +++ b/drivers/tty/serial/21285.c @@ -331,7 +331,7 @@ static int serial21285_verify_port(struct uart_port *port, struct serial_struct int ret = 0; if (ser->type != PORT_UNKNOWN && ser->type != PORT_21285) ret = -EINVAL; - if (ser->irq != NO_IRQ) + if (ser->irq <= 0) ret = -EINVAL; if (ser->baud_base != port->uartclk / 16) ret = -EINVAL; @@ -360,7 +360,7 @@ static struct uart_ops serial21285_ops = { static struct uart_port serial21285_port = { .mapbase = 0x42000160, .iotype = UPIO_MEM, - .irq = NO_IRQ, + .irq = 0, .fifosize = 16, .ops = &serial21285_ops, .flags = UPF_BOOT_AUTOCONF, diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index 9b7336fc..b423d0f 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -86,13 +86,6 @@ static unsigned int skip_txen_test; /* force skip of txen test at init time */ #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) -/* - * We default to IRQ0 for the "no irq" hack. Some - * machine types want others as well - they're free - * to redefine this in their header file. - */ -#define is_real_interrupt(irq) ((irq) != 0) - #ifdef CONFIG_SERIAL_8250_DETECT_IRQ #define CONFIG_SERIAL_DETECT_IRQ 1 #endif @@ -1750,7 +1743,7 @@ static void serial8250_backup_timeout(unsigned long data) * Must disable interrupts or else we risk racing with the interrupt * based handler. */ - if (is_real_interrupt(up->port.irq)) { + if (up->port.irq) { ier = serial_in(up, UART_IER); serial_out(up, UART_IER, 0); } @@ -1775,7 +1768,7 @@ static void serial8250_backup_timeout(unsigned long data) if (!(iir & UART_IIR_NO_INT)) serial8250_tx_chars(up); - if (is_real_interrupt(up->port.irq)) + if (up->port.irq) serial_out(up, UART_IER, ier); spin_unlock_irqrestore(&up->port.lock, flags); @@ -2028,7 +2021,7 @@ static int serial8250_startup(struct uart_port *port) serial_outp(up, UART_LCR, 0); } - if (is_real_interrupt(up->port.irq)) { + if (up->port.irq) { unsigned char iir1; /* * Test for UARTs that do not reassert THRE when the @@ -2083,7 +2076,7 @@ static int serial8250_startup(struct uart_port *port) * hardware interrupt, we use a timer-based system. The original * driver used to do this with IRQ0. */ - if (!is_real_interrupt(up->port.irq)) { + if (!up->port.irq) { up->timer.data = (unsigned long)up; mod_timer(&up->timer, jiffies + uart_poll_timeout(port)); } else { @@ -2099,13 +2092,13 @@ static int serial8250_startup(struct uart_port *port) spin_lock_irqsave(&up->port.lock, flags); if (up->port.flags & UPF_FOURPORT) { - if (!is_real_interrupt(up->port.irq)) + if (!up->port.irq) up->port.mctrl |= TIOCM_OUT1; } else /* * Most PC uarts need OUT2 raised to enable interrupts. */ - if (is_real_interrupt(up->port.irq)) + if (up->port.irq) up->port.mctrl |= TIOCM_OUT2; serial8250_set_mctrl(&up->port, up->port.mctrl); @@ -2223,7 +2216,7 @@ static void serial8250_shutdown(struct uart_port *port) del_timer_sync(&up->timer); up->timer.function = serial8250_timeout; - if (is_real_interrupt(up->port.irq)) + if (up->port.irq) serial_unlink_irq_chain(up); } diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 2de9924..76e7764 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -1347,4 +1347,17 @@ config SERIAL_AR933X_NR_UARTS Set this to the number of serial ports you want the driver to support. +config SERIAL_EFM32_UART + tristate "EFM32 UART/USART port." + depends on ARCH_EFM32 + select SERIAL_CORE + help + This driver support the USART and UART ports on + Energy Micro's efm32 SoCs. + +config SERIAL_EFM32_UART_CONSOLE + bool "EFM32 UART/USART console support" + depends on SERIAL_EFM32_UART=y + select SERIAL_CORE_CONSOLE + endmenu diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile index fef32e1..7257c5d 100644 --- a/drivers/tty/serial/Makefile +++ b/drivers/tty/serial/Makefile @@ -61,12 +61,12 @@ obj-$(CONFIG_SERIAL_OF_PLATFORM) += of_serial.o obj-$(CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL) += nwpserial.o obj-$(CONFIG_SERIAL_KS8695) += serial_ks8695.o obj-$(CONFIG_SERIAL_OMAP) += omap-serial.o +obj-$(CONFIG_SERIAL_ALTERA_UART) += altera_uart.o obj-$(CONFIG_KGDB_SERIAL_CONSOLE) += kgdboc.o obj-$(CONFIG_SERIAL_QE) += ucc_uart.o obj-$(CONFIG_SERIAL_TIMBERDALE) += timbuart.o obj-$(CONFIG_SERIAL_GRLIB_GAISLER_APBUART) += apbuart.o obj-$(CONFIG_SERIAL_ALTERA_JTAGUART) += altera_jtaguart.o -obj-$(CONFIG_SERIAL_ALTERA_UART) += altera_uart.o obj-$(CONFIG_SERIAL_VT8500) += vt8500_serial.o obj-$(CONFIG_SERIAL_MRST_MAX3110) += mrst_max3110.o obj-$(CONFIG_SERIAL_MFD_HSU) += mfd.o @@ -78,3 +78,4 @@ obj-$(CONFIG_SERIAL_LANTIQ) += lantiq.o obj-$(CONFIG_SERIAL_XILINX_PS_UART) += xilinx_uartps.o obj-$(CONFIG_SERIAL_SIRFSOC) += sirfsoc_uart.o obj-$(CONFIG_SERIAL_AR933X) += ar933x_uart.o +obj-$(CONFIG_SERIAL_EFM32_UART) += efm32-uart.o diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c index 1d04c50..e790375 100644 --- a/drivers/tty/serial/altera_uart.c +++ b/drivers/tty/serial/altera_uart.c @@ -377,6 +377,26 @@ static int altera_uart_verify_port(struct uart_port *port, return 0; } +#ifdef CONFIG_CONSOLE_POLL +static int altera_uart_poll_get_char(struct uart_port *port) +{ + while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) & + ALTERA_UART_STATUS_RRDY_MSK)) + cpu_relax(); + + return altera_uart_readl(port, ALTERA_UART_RXDATA_REG); +} + +static void altera_uart_poll_put_char(struct uart_port *port, unsigned char c) +{ + while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) & + ALTERA_UART_STATUS_TRDY_MSK)) + cpu_relax(); + + altera_uart_writel(port, c, ALTERA_UART_TXDATA_REG); +} +#endif + /* * Define the basic serial functions we support. */ @@ -397,35 +417,16 @@ static struct uart_ops altera_uart_ops = { .release_port = altera_uart_release_port, .config_port = altera_uart_config_port, .verify_port = altera_uart_verify_port, +#ifdef CONFIG_CONSOLE_POLL + .poll_get_char = altera_uart_poll_get_char, + .poll_put_char = altera_uart_poll_put_char, +#endif }; static struct altera_uart altera_uart_ports[CONFIG_SERIAL_ALTERA_UART_MAXPORTS]; #if defined(CONFIG_SERIAL_ALTERA_UART_CONSOLE) -int __init early_altera_uart_setup(struct altera_uart_platform_uart *platp) -{ - struct uart_port *port; - int i; - - for (i = 0; i < CONFIG_SERIAL_ALTERA_UART_MAXPORTS && platp[i].mapbase; i++) { - port = &altera_uart_ports[i].port; - - port->line = i; - port->type = PORT_ALTERA_UART; - port->mapbase = platp[i].mapbase; - port->membase = ioremap(port->mapbase, ALTERA_UART_SIZE); - port->iotype = SERIAL_IO_MEM; - port->irq = platp[i].irq; - port->uartclk = platp[i].uartclk; - port->flags = UPF_BOOT_AUTOCONF; - port->ops = &altera_uart_ops; - port->private_data = platp; - } - - return 0; -} - static void altera_uart_console_putc(struct uart_port *port, const char c) { while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) & diff --git a/drivers/tty/serial/efm32-uart.c b/drivers/tty/serial/efm32-uart.c new file mode 100644 index 0000000..615e464 --- /dev/null +++ b/drivers/tty/serial/efm32-uart.c @@ -0,0 +1,830 @@ +#if defined(CONFIG_SERIAL_EFM32_UART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) +#define SUPPORT_SYSRQ +#endif + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/io.h> +#include <linux/platform_device.h> +#include <linux/console.h> +#include <linux/sysrq.h> +#include <linux/serial_core.h> +#include <linux/tty_flip.h> +#include <linux/slab.h> +#include <linux/clk.h> +#include <linux/of.h> +#include <linux/of_device.h> + +#include <linux/platform_data/efm32-uart.h> + +#define DRIVER_NAME "efm32-uart" +#define DEV_NAME "ttyefm" + +#define UARTn_CTRL 0x00 +#define UARTn_CTRL_SYNC 0x0001 +#define UARTn_CTRL_TXBIL 0x1000 + +#define UARTn_FRAME 0x04 +#define UARTn_FRAME_DATABITS__MASK 0x000f +#define UARTn_FRAME_DATABITS(n) ((n) - 3) +#define UARTn_FRAME_PARITY_NONE 0x0000 +#define UARTn_FRAME_PARITY_EVEN 0x0200 +#define UARTn_FRAME_PARITY_ODD 0x0300 +#define UARTn_FRAME_STOPBITS_HALF 0x0000 +#define UARTn_FRAME_STOPBITS_ONE 0x1000 +#define UARTn_FRAME_STOPBITS_TWO 0x3000 + +#define UARTn_CMD 0x0c +#define UARTn_CMD_RXEN 0x0001 +#define UARTn_CMD_RXDIS 0x0002 +#define UARTn_CMD_TXEN 0x0004 +#define UARTn_CMD_TXDIS 0x0008 + +#define UARTn_STATUS 0x10 +#define UARTn_STATUS_TXENS 0x0002 +#define UARTn_STATUS_TXC 0x0020 +#define UARTn_STATUS_TXBL 0x0040 +#define UARTn_STATUS_RXDATAV 0x0080 + +#define UARTn_CLKDIV 0x14 + +#define UARTn_RXDATAX 0x18 +#define UARTn_RXDATAX_RXDATA__MASK 0x01ff +#define UARTn_RXDATAX_PERR 0x4000 +#define UARTn_RXDATAX_FERR 0x8000 +/* + * This is a software only flag used for ignore_status_mask and + * read_status_mask! It's used for breaks that the hardware doesn't report + * explicitly. + */ +#define SW_UARTn_RXDATAX_BERR 0x2000 + +#define UARTn_TXDATA 0x34 + +#define UARTn_IF 0x40 +#define UARTn_IF_TXC 0x0001 +#define UARTn_IF_TXBL 0x0002 +#define UARTn_IF_RXDATAV 0x0004 +#define UARTn_IF_RXOF 0x0010 + +#define UARTn_IFS 0x44 +#define UARTn_IFC 0x48 +#define UARTn_IEN 0x4c + +#define UARTn_ROUTE 0x54 +#define UARTn_ROUTE_LOCATION__MASK 0x0700 +#define UARTn_ROUTE_LOCATION(n) (((n) << 8) & UARTn_ROUTE_LOCATION__MASK) +#define UARTn_ROUTE_RXPEN 0x0001 +#define UARTn_ROUTE_TXPEN 0x0002 + +struct efm32_uart_port { + struct uart_port port; + unsigned int txirq; + struct clk *clk; +}; +#define to_efm_port(_port) container_of(_port, struct efm32_uart_port, port) +#define efm_debug(efm_port, format, arg...) \ + dev_dbg(efm_port->port.dev, format, ##arg) + +static void efm32_uart_write32(struct efm32_uart_port *efm_port, + u32 value, unsigned offset) +{ + writel_relaxed(value, efm_port->port.membase + offset); +} + +static u32 efm32_uart_read32(struct efm32_uart_port *efm_port, + unsigned offset) +{ + return readl_relaxed(efm_port->port.membase + offset); +} + +static unsigned int efm32_uart_tx_empty(struct uart_port *port) +{ + struct efm32_uart_port *efm_port = to_efm_port(port); + u32 status = efm32_uart_read32(efm_port, UARTn_STATUS); + + if (status & UARTn_STATUS_TXC) + return TIOCSER_TEMT; + else + return 0; +} + +static void efm32_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) +{ + /* sorry, neither handshaking lines nor loop functionallity */ +} + +static unsigned int efm32_uart_get_mctrl(struct uart_port *port) +{ + /* sorry, no handshaking lines available */ + return TIOCM_CAR | TIOCM_CTS | TIOCM_DSR; +} + +static void efm32_uart_stop_tx(struct uart_port *port) +{ + struct efm32_uart_port *efm_port = to_efm_port(port); + u32 ien = efm32_uart_read32(efm_port, UARTn_IEN); + + efm32_uart_write32(efm_port, UARTn_CMD_TXDIS, UARTn_CMD); + ien &= ~(UARTn_IF_TXC | UARTn_IF_TXBL); + efm32_uart_write32(efm_port, ien, UARTn_IEN); +} + +static void efm32_uart_tx_chars(struct efm32_uart_port *efm_port) +{ + struct uart_port *port = &efm_port->port; + struct circ_buf *xmit = &port->state->xmit; + + while (efm32_uart_read32(efm_port, UARTn_STATUS) & + UARTn_STATUS_TXBL) { + if (port->x_char) { + port->icount.tx++; + efm32_uart_write32(efm_port, port->x_char, + UARTn_TXDATA); + port->x_char = 0; + continue; + } + if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) { + port->icount.tx++; + efm32_uart_write32(efm_port, xmit->buf[xmit->tail], + UARTn_TXDATA); + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + } else + break; + } + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(port); + + if (!port->x_char && uart_circ_empty(xmit) && + efm32_uart_read32(efm_port, UARTn_STATUS) & + UARTn_STATUS_TXC) + efm32_uart_stop_tx(port); +} + +static void efm32_uart_start_tx(struct uart_port *port) +{ + struct efm32_uart_port *efm_port = to_efm_port(port); + u32 ien; + + efm32_uart_write32(efm_port, + UARTn_IF_TXBL | UARTn_IF_TXC, UARTn_IFC); + ien = efm32_uart_read32(efm_port, UARTn_IEN); + efm32_uart_write32(efm_port, + ien | UARTn_IF_TXBL | UARTn_IF_TXC, UARTn_IEN); + efm32_uart_write32(efm_port, UARTn_CMD_TXEN, UARTn_CMD); + + efm32_uart_tx_chars(efm_port); +} + +static void efm32_uart_stop_rx(struct uart_port *port) +{ + struct efm32_uart_port *efm_port = to_efm_port(port); + + efm32_uart_write32(efm_port, UARTn_CMD_RXDIS, UARTn_CMD); +} + +static void efm32_uart_enable_ms(struct uart_port *port) +{ + /* no handshake lines, no modem status interrupts */ +} + +static void efm32_uart_break_ctl(struct uart_port *port, int ctl) +{ + /* not possible without fiddling with gpios */ +} + +static void efm32_uart_rx_chars(struct efm32_uart_port *efm_port, + struct tty_struct *tty) +{ + struct uart_port *port = &efm_port->port; + + while (efm32_uart_read32(efm_port, UARTn_STATUS) & + UARTn_STATUS_RXDATAV) { + u32 rxdata = efm32_uart_read32(efm_port, UARTn_RXDATAX); + int flag = 0; + + /* + * This is a reserved bit and I only saw it read as 0. But to be + * sure not to be confused too much by new devices adhere to the + * warning in the reference manual that reserverd bits might + * read as 1 in the future. + */ + rxdata &= ~SW_UARTn_RXDATAX_BERR; + + port->icount.rx++; + + if ((rxdata & UARTn_RXDATAX_FERR) && + !(rxdata & UARTn_RXDATAX_RXDATA__MASK)) { + rxdata |= SW_UARTn_RXDATAX_BERR; + port->icount.brk++; + if (uart_handle_break(port)) + continue; + } else if (rxdata & UARTn_RXDATAX_PERR) + port->icount.parity++; + else if (rxdata & UARTn_RXDATAX_FERR) + port->icount.frame++; + + rxdata &= port->read_status_mask; + + if (rxdata & SW_UARTn_RXDATAX_BERR) + flag = TTY_BREAK; + else if (rxdata & UARTn_RXDATAX_PERR) + flag = TTY_PARITY; + else if (rxdata & UARTn_RXDATAX_FERR) + flag = TTY_FRAME; + else if (uart_handle_sysrq_char(port, + rxdata & UARTn_RXDATAX_RXDATA__MASK)) + continue; + + if (tty && (rxdata & port->ignore_status_mask) == 0) + tty_insert_flip_char(tty, + rxdata & UARTn_RXDATAX_RXDATA__MASK, flag); + } +} + +static irqreturn_t efm32_uart_rxirq(int irq, void *data) +{ + struct efm32_uart_port *efm_port = data; + u32 irqflag = efm32_uart_read32(efm_port, UARTn_IF); + int handled = IRQ_NONE; + struct uart_port *port = &efm_port->port; + struct tty_struct *tty; + + spin_lock(&port->lock); + + tty = tty_kref_get(port->state->port.tty); + + if (irqflag & UARTn_IF_RXDATAV) { + efm32_uart_write32(efm_port, UARTn_IF_RXDATAV, UARTn_IFC); + efm32_uart_rx_chars(efm_port, tty); + + handled = IRQ_HANDLED; + } + + if (irqflag & UARTn_IF_RXOF) { + efm32_uart_write32(efm_port, UARTn_IF_RXOF, UARTn_IFC); + port->icount.overrun++; + if (tty) + tty_insert_flip_char(tty, 0, TTY_OVERRUN); + + handled = IRQ_HANDLED; + } + + if (tty) { + tty_flip_buffer_push(tty); + tty_kref_put(tty); + } + + spin_unlock(&port->lock); + + return handled; +} + +static irqreturn_t efm32_uart_txirq(int irq, void *data) +{ + struct efm32_uart_port *efm_port = data; + u32 irqflag = efm32_uart_read32(efm_port, UARTn_IF); + + /* TXBL doesn't need to be cleared */ + if (irqflag & UARTn_IF_TXC) + efm32_uart_write32(efm_port, UARTn_IF_TXC, UARTn_IFC); + + if (irqflag & (UARTn_IF_TXC | UARTn_IF_TXBL)) { + efm32_uart_tx_chars(efm_port); + return IRQ_HANDLED; + } else + return IRQ_NONE; +} + +static int efm32_uart_startup(struct uart_port *port) +{ + struct efm32_uart_port *efm_port = to_efm_port(port); + u32 location = 0; + struct efm32_uart_pdata *pdata = dev_get_platdata(port->dev); + int ret; + + if (pdata) + location = UARTn_ROUTE_LOCATION(pdata->location); + + ret = clk_enable(efm_port->clk); + if (ret) { + efm_debug(efm_port, "failed to enable clk\n"); + goto err_clk_enable; + } + port->uartclk = clk_get_rate(efm_port->clk); + + /* Enable pins at configured location */ + efm32_uart_write32(efm_port, location | UARTn_ROUTE_RXPEN | UARTn_ROUTE_TXPEN, + UARTn_ROUTE); + + ret = request_irq(port->irq, efm32_uart_rxirq, 0, + DRIVER_NAME, efm_port); + if (ret) { + efm_debug(efm_port, "failed to register rxirq\n"); + goto err_request_irq_rx; + } + + /* disable all irqs */ + efm32_uart_write32(efm_port, 0, UARTn_IEN); + + ret = request_irq(efm_port->txirq, efm32_uart_txirq, 0, + DRIVER_NAME, efm_port); + if (ret) { + efm_debug(efm_port, "failed to register txirq\n"); + free_irq(port->irq, efm_port); +err_request_irq_rx: + + clk_disable(efm_port->clk); + } else { + efm32_uart_write32(efm_port, + UARTn_IF_RXDATAV | UARTn_IF_RXOF, UARTn_IEN); + efm32_uart_write32(efm_port, UARTn_CMD_RXEN, UARTn_CMD); + } + +err_clk_enable: + return ret; +} + +static void efm32_uart_shutdown(struct uart_port *port) +{ + struct efm32_uart_port *efm_port = to_efm_port(port); + + efm32_uart_write32(efm_port, 0, UARTn_IEN); + free_irq(port->irq, efm_port); + + clk_disable(efm_port->clk); +} + +static void efm32_uart_set_termios(struct uart_port *port, + struct ktermios *new, struct ktermios *old) +{ + struct efm32_uart_port *efm_port = to_efm_port(port); + unsigned long flags; + unsigned baud; + u32 clkdiv; + u32 frame = 0; + + /* no modem control lines */ + new->c_cflag &= ~(CRTSCTS | CMSPAR); + + baud = uart_get_baud_rate(port, new, old, + DIV_ROUND_CLOSEST(port->uartclk, 16 * 8192), + DIV_ROUND_CLOSEST(port->uartclk, 16)); + + switch (new->c_cflag & CSIZE) { + case CS5: + frame |= UARTn_FRAME_DATABITS(5); + break; + case CS6: + frame |= UARTn_FRAME_DATABITS(6); + break; + case CS7: + frame |= UARTn_FRAME_DATABITS(7); + break; + case CS8: + frame |= UARTn_FRAME_DATABITS(8); + break; + } + + if (new->c_cflag & CSTOPB) + /* the receiver only verifies the first stop bit */ + frame |= UARTn_FRAME_STOPBITS_TWO; + else + frame |= UARTn_FRAME_STOPBITS_ONE; + + if (new->c_cflag & PARENB) { + if (new->c_cflag & PARODD) + frame |= UARTn_FRAME_PARITY_ODD; + else + frame |= UARTn_FRAME_PARITY_EVEN; + } else + frame |= UARTn_FRAME_PARITY_NONE; + + /* + * the 6 lowest bits of CLKDIV are dc, bit 6 has value 0.25. + * port->uartclk <= 14e6, so 4 * port->uartclk doesn't overflow. + */ + clkdiv = (DIV_ROUND_CLOSEST(4 * port->uartclk, 16 * baud) - 4) << 6; + + spin_lock_irqsave(&port->lock, flags); + + efm32_uart_write32(efm_port, + UARTn_CMD_TXDIS | UARTn_CMD_RXDIS, UARTn_CMD); + + port->read_status_mask = UARTn_RXDATAX_RXDATA__MASK; + if (new->c_iflag & INPCK) + port->read_status_mask |= + UARTn_RXDATAX_FERR | UARTn_RXDATAX_PERR; + if (new->c_iflag & (BRKINT | PARMRK)) + port->read_status_mask |= SW_UARTn_RXDATAX_BERR; + + port->ignore_status_mask = 0; + if (new->c_iflag & IGNPAR) + port->ignore_status_mask |= + UARTn_RXDATAX_FERR | UARTn_RXDATAX_PERR; + if (new->c_iflag & IGNBRK) + port->ignore_status_mask |= SW_UARTn_RXDATAX_BERR; + + uart_update_timeout(port, new->c_cflag, baud); + + efm32_uart_write32(efm_port, UARTn_CTRL_TXBIL, UARTn_CTRL); + efm32_uart_write32(efm_port, frame, UARTn_FRAME); + efm32_uart_write32(efm_port, clkdiv, UARTn_CLKDIV); + + efm32_uart_write32(efm_port, UARTn_CMD_TXEN | UARTn_CMD_RXEN, + UARTn_CMD); + + spin_unlock_irqrestore(&port->lock, flags); +} + +static const char *efm32_uart_type(struct uart_port *port) +{ + return port->type == PORT_EFMUART ? "efm32-uart" : NULL; +} + +static void efm32_uart_release_port(struct uart_port *port) +{ + struct efm32_uart_port *efm_port = to_efm_port(port); + + clk_unprepare(efm_port->clk); + clk_put(efm_port->clk); + iounmap(port->membase); +} + +static int efm32_uart_request_port(struct uart_port *port) +{ + struct efm32_uart_port *efm_port = to_efm_port(port); + int ret; + + port->membase = ioremap(port->mapbase, 60); + if (!efm_port->port.membase) { + ret = -ENOMEM; + efm_debug(efm_port, "failed to remap\n"); + goto err_ioremap; + } + + efm_port->clk = clk_get(port->dev, NULL); + if (IS_ERR(efm_port->clk)) { + ret = PTR_ERR(efm_port->clk); + efm_debug(efm_port, "failed to get clock\n"); + goto err_clk_get; + } + + ret = clk_prepare(efm_port->clk); + if (ret) { + clk_put(efm_port->clk); +err_clk_get: + + iounmap(port->membase); +err_ioremap: + return ret; + } + return 0; +} + +static void efm32_uart_config_port(struct uart_port *port, int type) +{ + if (type & UART_CONFIG_TYPE && + !efm32_uart_request_port(port)) + port->type = PORT_EFMUART; +} + +static int efm32_uart_verify_port(struct uart_port *port, + struct serial_struct *serinfo) +{ + int ret = 0; + + if (serinfo->type != PORT_UNKNOWN && serinfo->type != PORT_EFMUART) + ret = -EINVAL; + + return ret; +} + +static struct uart_ops efm32_uart_pops = { + .tx_empty = efm32_uart_tx_empty, + .set_mctrl = efm32_uart_set_mctrl, + .get_mctrl = efm32_uart_get_mctrl, + .stop_tx = efm32_uart_stop_tx, + .start_tx = efm32_uart_start_tx, + .stop_rx = efm32_uart_stop_rx, + .enable_ms = efm32_uart_enable_ms, + .break_ctl = efm32_uart_break_ctl, + .startup = efm32_uart_startup, + .shutdown = efm32_uart_shutdown, + .set_termios = efm32_uart_set_termios, + .type = efm32_uart_type, + .release_port = efm32_uart_release_port, + .request_port = efm32_uart_request_port, + .config_port = efm32_uart_config_port, + .verify_port = efm32_uart_verify_port, +}; + +static struct efm32_uart_port *efm32_uart_ports[5]; + +#ifdef CONFIG_SERIAL_EFM32_UART_CONSOLE +static void efm32_uart_console_putchar(struct uart_port *port, int ch) +{ + struct efm32_uart_port *efm_port = to_efm_port(port); + unsigned int timeout = 0x400; + u32 status; + + while (1) { + status = efm32_uart_read32(efm_port, UARTn_STATUS); + + if (status & UARTn_STATUS_TXBL) + break; + if (!timeout--) + return; + } + efm32_uart_write32(efm_port, ch, UARTn_TXDATA); +} + +static void efm32_uart_console_write(struct console *co, const char *s, + unsigned int count) +{ + struct efm32_uart_port *efm_port = efm32_uart_ports[co->index]; + u32 status = efm32_uart_read32(efm_port, UARTn_STATUS); + unsigned int timeout = 0x400; + + if (!(status & UARTn_STATUS_TXENS)) + efm32_uart_write32(efm_port, UARTn_CMD_TXEN, UARTn_CMD); + + uart_console_write(&efm_port->port, s, count, + efm32_uart_console_putchar); + + /* Wait for the transmitter to become empty */ + while (1) { + u32 status = efm32_uart_read32(efm_port, UARTn_STATUS); + if (status & UARTn_STATUS_TXC) + break; + if (!timeout--) + break; + } + + if (!(status & UARTn_STATUS_TXENS)) + efm32_uart_write32(efm_port, UARTn_CMD_TXDIS, UARTn_CMD); +} + +static void efm32_uart_console_get_options(struct efm32_uart_port *efm_port, + int *baud, int *parity, int *bits) +{ + u32 ctrl = efm32_uart_read32(efm_port, UARTn_CTRL); + u32 route, clkdiv, frame; + + if (ctrl & UARTn_CTRL_SYNC) + /* not operating in async mode */ + return; + + route = efm32_uart_read32(efm_port, UARTn_ROUTE); + if (!(route & UARTn_ROUTE_TXPEN)) + /* tx pin not routed */ + return; + + clkdiv = efm32_uart_read32(efm_port, UARTn_CLKDIV); + + *baud = DIV_ROUND_CLOSEST(4 * efm_port->port.uartclk, + 16 * (4 + (clkdiv >> 6))); + + frame = efm32_uart_read32(efm_port, UARTn_FRAME); + if (frame & UARTn_FRAME_PARITY_ODD) + *parity = 'o'; + else if (frame & UARTn_FRAME_PARITY_EVEN) + *parity = 'e'; + else + *parity = 'n'; + + *bits = (frame & UARTn_FRAME_DATABITS__MASK) - + UARTn_FRAME_DATABITS(4) + 4; + + efm_debug(efm_port, "get_opts: options=%d%c%d\n", + *baud, *parity, *bits); +} + +static int efm32_uart_console_setup(struct console *co, char *options) +{ + struct efm32_uart_port *efm_port; + int baud = 115200; + int bits = 8; + int parity = 'n'; + int flow = 'n'; + int ret; + + if (co->index < 0 || co->index >= ARRAY_SIZE(efm32_uart_ports)) { + unsigned i; + for (i = 0; i < ARRAY_SIZE(efm32_uart_ports); ++i) { + if (efm32_uart_ports[i]) { + pr_warn("efm32-console: fall back to console index %u (from %hhi)\n", + i, co->index); + co->index = i; + break; + } + } + } + + efm_port = efm32_uart_ports[co->index]; + if (!efm_port) { + pr_warn("efm32-console: No port at %d\n", co->index); + return -ENODEV; + } + + ret = clk_prepare(efm_port->clk); + if (ret) { + dev_warn(efm_port->port.dev, + "console: clk_prepare failed: %d\n", ret); + return ret; + } + + efm_port->port.uartclk = clk_get_rate(efm_port->clk); + + if (options) + uart_parse_options(options, &baud, &parity, &bits, &flow); + else + efm32_uart_console_get_options(efm_port, + &baud, &parity, &bits); + + return uart_set_options(&efm_port->port, co, baud, parity, bits, flow); +} + +static struct uart_driver efm32_uart_reg; + +static struct console efm32_uart_console = { + .name = DEV_NAME, + .write = efm32_uart_console_write, + .device = uart_console_device, + .setup = efm32_uart_console_setup, + .flags = CON_PRINTBUFFER, + .index = -1, + .data = &efm32_uart_reg, +}; + +#else +#define efm32_uart_console (*(struct console *)NULL) +#endif /* ifdef CONFIG_SERIAL_EFM32_UART_CONSOLE / else */ + +static struct uart_driver efm32_uart_reg = { + .owner = THIS_MODULE, + .driver_name = DRIVER_NAME, + .dev_name = DEV_NAME, + .nr = ARRAY_SIZE(efm32_uart_ports), + .cons = &efm32_uart_console, +}; + +static int efm32_uart_probe_dt(struct platform_device *pdev, + struct efm32_uart_port *efm_port) +{ + struct device_node *np = pdev->dev.of_node; + int ret; + + if (!np) + return 1; + + ret = of_alias_get_id(np, "serial"); + if (ret < 0) { + dev_err(&pdev->dev, "failed to get alias id: %d\n", ret); + return ret; + } else { + efm_port->port.line = ret; + return 0; + } + +} + +static int __devinit efm32_uart_probe(struct platform_device *pdev) +{ + struct efm32_uart_port *efm_port; + struct resource *res; + int ret; + + efm_port = kzalloc(sizeof(*efm_port), GFP_KERNEL); + if (!efm_port) { + dev_dbg(&pdev->dev, "failed to allocate private data\n"); + return -ENOMEM; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + ret = -ENODEV; + dev_dbg(&pdev->dev, "failed to determine base address\n"); + goto err_get_base; + } + + if (resource_size(res) < 60) { + ret = -EINVAL; + dev_dbg(&pdev->dev, "memory resource too small\n"); + goto err_too_small; + } + + ret = platform_get_irq(pdev, 0); + if (ret <= 0) { + dev_dbg(&pdev->dev, "failed to get rx irq\n"); + goto err_get_rxirq; + } + + efm_port->port.irq = ret; + + ret = platform_get_irq(pdev, 1); + if (ret <= 0) + ret = efm_port->port.irq + 1; + + efm_port->txirq = ret; + + efm_port->port.dev = &pdev->dev; + efm_port->port.mapbase = res->start; + efm_port->port.type = PORT_EFMUART; + efm_port->port.iotype = UPIO_MEM32; + efm_port->port.fifosize = 2; + efm_port->port.ops = &efm32_uart_pops; + efm_port->port.flags = UPF_BOOT_AUTOCONF; + + ret = efm32_uart_probe_dt(pdev, efm_port); + if (ret > 0) + /* not created by device tree */ + efm_port->port.line = pdev->id; + + if (efm_port->port.line >= 0 && + efm_port->port.line < ARRAY_SIZE(efm32_uart_ports)) + efm32_uart_ports[efm_port->port.line] = efm_port; + + ret = uart_add_one_port(&efm32_uart_reg, &efm_port->port); + if (ret) { + dev_dbg(&pdev->dev, "failed to add port: %d\n", ret); + + if (pdev->id >= 0 && pdev->id < ARRAY_SIZE(efm32_uart_ports)) + efm32_uart_ports[pdev->id] = NULL; +err_get_rxirq: +err_too_small: +err_get_base: + kfree(efm_port); + } else { + platform_set_drvdata(pdev, efm_port); + dev_dbg(&pdev->dev, "\\o/\n"); + } + + return ret; +} + +static int __devexit efm32_uart_remove(struct platform_device *pdev) +{ + struct efm32_uart_port *efm_port = platform_get_drvdata(pdev); + + platform_set_drvdata(pdev, NULL); + + uart_remove_one_port(&efm32_uart_reg, &efm_port->port); + + if (pdev->id >= 0 && pdev->id < ARRAY_SIZE(efm32_uart_ports)) + efm32_uart_ports[pdev->id] = NULL; + + kfree(efm_port); + + return 0; +} + +static struct of_device_id efm32_uart_dt_ids[] = { + { + .compatible = "efm32,uart", + }, { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(of, efm32_uart_dt_ids); + +static struct platform_driver efm32_uart_driver = { + .probe = efm32_uart_probe, + .remove = __devexit_p(efm32_uart_remove), + + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + .of_match_table = efm32_uart_dt_ids, + }, +}; + +static int __init efm32_uart_init(void) +{ + int ret; + + ret = uart_register_driver(&efm32_uart_reg); + if (ret) + return ret; + + ret = platform_driver_register(&efm32_uart_driver); + if (ret) + uart_unregister_driver(&efm32_uart_reg); + + pr_info("EFM32 UART/USART driver\n"); + + return ret; +} +module_init(efm32_uart_init); + +static void __exit efm32_uart_exit(void) +{ + platform_driver_unregister(&efm32_uart_driver); + uart_unregister_driver(&efm32_uart_reg); +} + +MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>"); +MODULE_DESCRIPTION("EFM32 UART/USART driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DRIVER_NAME); diff --git a/drivers/tty/serial/m32r_sio.c b/drivers/tty/serial/m32r_sio.c index 94a6792..e465dda 100644 --- a/drivers/tty/serial/m32r_sio.c +++ b/drivers/tty/serial/m32r_sio.c @@ -70,13 +70,6 @@ #define PASS_LIMIT 256 -/* - * We default to IRQ0 for the "no irq" hack. Some - * machine types want others as well - they're free - * to redefine this in their header file. - */ -#define is_real_interrupt(irq) ((irq) != 0) - #define BASE_BAUD 115200 /* Standard COM flags */ @@ -640,7 +633,7 @@ static int m32r_sio_startup(struct uart_port *port) * hardware interrupt, we use a timer-based system. The original * driver used to do this with IRQ0. */ - if (!is_real_interrupt(up->port.irq)) { + if (!up->port.irq) { unsigned int timeout = up->port.timeout; timeout = timeout > 6 ? (timeout / 2 - 2) : 1; @@ -687,7 +680,7 @@ static void m32r_sio_shutdown(struct uart_port *port) sio_init(); - if (!is_real_interrupt(up->port.irq)) + if (!up->port.irq) del_timer_sync(&up->timer); else serial_unlink_irq_chain(up); diff --git a/drivers/tty/serial/mpc52xx_uart.c b/drivers/tty/serial/mpc52xx_uart.c index 1093a88..e9a770d 100644 --- a/drivers/tty/serial/mpc52xx_uart.c +++ b/drivers/tty/serial/mpc52xx_uart.c @@ -507,7 +507,7 @@ static int __init mpc512x_psc_fifoc_init(void) psc_fifoc_irq = irq_of_parse_and_map(np, 0); of_node_put(np); - if (psc_fifoc_irq == NO_IRQ) { + if (psc_fifoc_irq == 0) { pr_err("%s: Can't get FIFOC irq\n", __func__); iounmap(psc_fifoc); return -ENODEV; @@ -1354,7 +1354,7 @@ static int __devinit mpc52xx_uart_of_probe(struct platform_device *op) } psc_ops->get_irq(port, op->dev.of_node); - if (port->irq == NO_IRQ) { + if (port->irq == 0) { dev_dbg(&op->dev, "Could not get irq\n"); return -EINVAL; } diff --git a/drivers/tty/serial/mux.c b/drivers/tty/serial/mux.c index 06f6aef..c61d950 100644 --- a/drivers/tty/serial/mux.c +++ b/drivers/tty/serial/mux.c @@ -499,7 +499,7 @@ static int __init mux_probe(struct parisc_device *dev) port->membase = ioremap_nocache(port->mapbase, MUX_LINE_OFFSET); port->iotype = UPIO_MEM; port->type = PORT_MUX; - port->irq = NO_IRQ; + port->irq = 0; port->uartclk = 0; port->fifosize = MUX_FIFO_SIZE; port->ops = &mux_pops; diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index 17ae657..aa4d07b 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -29,6 +29,7 @@ #include <linux/nmi.h> #include <linux/delay.h> +#include <linux/debugfs.h> #include <linux/dmaengine.h> #include <linux/pch_dma.h> @@ -144,6 +145,8 @@ enum { #define PCH_UART_DLL 0x00 #define PCH_UART_DLM 0x01 +#define PCH_UART_BRCSR 0x0E + #define PCH_UART_IID_RLS (PCH_UART_IIR_REI) #define PCH_UART_IID_RDR (PCH_UART_IIR_RRI) #define PCH_UART_IID_RDR_TO (PCH_UART_IIR_RRI | PCH_UART_IIR_TOI) @@ -243,6 +246,8 @@ struct eg20t_port { int tx_dma_use; void *rx_buf_virt; dma_addr_t rx_buf_dma; + + struct dentry *debugfs; }; /** @@ -292,23 +297,73 @@ static const int trigger_level_64[4] = { 1, 16, 32, 56 }; static const int trigger_level_16[4] = { 1, 4, 8, 14 }; static const int trigger_level_1[4] = { 1, 1, 1, 1 }; -static void pch_uart_hal_request(struct pci_dev *pdev, int fifosize, - int base_baud) -{ - struct eg20t_port *priv = pci_get_drvdata(pdev); +#ifdef CONFIG_DEBUG_FS - priv->trigger_level = 1; - priv->fcr = 0; +#define PCH_REGS_BUFSIZE 1024 +static int pch_show_regs_open(struct inode *inode, struct file *file) +{ + file->private_data = inode->i_private; + return 0; } -static unsigned int get_msr(struct eg20t_port *priv, void __iomem *base) +static ssize_t port_show_regs(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) { - unsigned int msr = ioread8(base + UART_MSR); - priv->dmsr |= msr & PCH_UART_MSR_DELTA; + struct eg20t_port *priv = file->private_data; + char *buf; + u32 len = 0; + ssize_t ret; + unsigned char lcr; + + buf = kzalloc(PCH_REGS_BUFSIZE, GFP_KERNEL); + if (!buf) + return 0; + + len += snprintf(buf + len, PCH_REGS_BUFSIZE - len, + "PCH EG20T port[%d] regs:\n", priv->port.line); + + len += snprintf(buf + len, PCH_REGS_BUFSIZE - len, + "=================================\n"); + len += snprintf(buf + len, PCH_REGS_BUFSIZE - len, + "IER: \t0x%02x\n", ioread8(priv->membase + UART_IER)); + len += snprintf(buf + len, PCH_REGS_BUFSIZE - len, + "IIR: \t0x%02x\n", ioread8(priv->membase + UART_IIR)); + len += snprintf(buf + len, PCH_REGS_BUFSIZE - len, + "LCR: \t0x%02x\n", ioread8(priv->membase + UART_LCR)); + len += snprintf(buf + len, PCH_REGS_BUFSIZE - len, + "MCR: \t0x%02x\n", ioread8(priv->membase + UART_MCR)); + len += snprintf(buf + len, PCH_REGS_BUFSIZE - len, + "LSR: \t0x%02x\n", ioread8(priv->membase + UART_LSR)); + len += snprintf(buf + len, PCH_REGS_BUFSIZE - len, + "MSR: \t0x%02x\n", ioread8(priv->membase + UART_MSR)); + len += snprintf(buf + len, PCH_REGS_BUFSIZE - len, + "BRCSR: \t0x%02x\n", + ioread8(priv->membase + PCH_UART_BRCSR)); - return msr; + lcr = ioread8(priv->membase + UART_LCR); + iowrite8(PCH_UART_LCR_DLAB, priv->membase + UART_LCR); + len += snprintf(buf + len, PCH_REGS_BUFSIZE - len, + "DLL: \t0x%02x\n", ioread8(priv->membase + UART_DLL)); + len += snprintf(buf + len, PCH_REGS_BUFSIZE - len, + "DLM: \t0x%02x\n", ioread8(priv->membase + UART_DLM)); + iowrite8(lcr, priv->membase + UART_LCR); + + if (len > PCH_REGS_BUFSIZE) + len = PCH_REGS_BUFSIZE; + + ret = simple_read_from_buffer(user_buf, count, ppos, buf, len); + kfree(buf); + return ret; } +static const struct file_operations port_regs_ops = { + .owner = THIS_MODULE, + .open = pch_show_regs_open, + .read = port_show_regs, + .llseek = default_llseek, +}; +#endif /* CONFIG_DEBUG_FS */ + static void pch_uart_hal_enable_interrupt(struct eg20t_port *priv, unsigned int flag) { @@ -442,8 +497,9 @@ static int pch_uart_hal_set_fifo(struct eg20t_port *priv, static u8 pch_uart_hal_get_modem(struct eg20t_port *priv) { - priv->dmsr = 0; - return get_msr(priv, priv->membase); + unsigned int msr = ioread8(priv->membase + UART_MSR); + priv->dmsr = msr & PCH_UART_MSR_DELTA; + return (u8)msr; } static void pch_uart_hal_write(struct eg20t_port *priv, @@ -524,7 +580,7 @@ static int push_rx(struct eg20t_port *priv, const unsigned char *buf, static int pop_tx_x(struct eg20t_port *priv, unsigned char *buf) { - int ret; + int ret = 0; struct uart_port *port = &priv->port; if (port->x_char) { @@ -533,8 +589,6 @@ static int pop_tx_x(struct eg20t_port *priv, unsigned char *buf) buf[0] = port->x_char; port->x_char = 0; ret = 1; - } else { - ret = 0; } return ret; @@ -1032,14 +1086,12 @@ static irqreturn_t pch_uart_interrupt(int irq, void *dev_id) static unsigned int pch_uart_tx_empty(struct uart_port *port) { struct eg20t_port *priv; - int ret; + priv = container_of(port, struct eg20t_port, port); if (priv->tx_empty) - ret = TIOCSER_TEMT; + return TIOCSER_TEMT; else - ret = 0; - - return ret; + return 0; } /* Returns the current state of modem control inputs. */ @@ -1273,9 +1325,8 @@ static void pch_uart_set_termios(struct uart_port *port, else parity = PCH_UART_HAL_PARITY_EVEN; - } else { + } else parity = PCH_UART_HAL_PARITY_NONE; - } /* Only UART0 has auto hardware flow function */ if ((termios->c_cflag & CRTSCTS) && (priv->fifo_size == 256)) @@ -1447,7 +1498,6 @@ static void pch_console_write(struct console *co, const char *s, unsigned int count) { struct eg20t_port *priv; - unsigned long flags; u8 ier; int locked = 1; @@ -1554,6 +1604,7 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev, int port_type; struct pch_uart_driver_data *board; const char *board_name; + char name[32]; /* for debugfs file name */ board = &drv_dat[id->driver_data]; port_type = board->port_type; @@ -1614,7 +1665,8 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev, spin_lock_init(&priv->port.lock); pci_set_drvdata(pdev, priv); - pch_uart_hal_request(pdev, fifosize, base_baud); + priv->trigger_level = 1; + priv->fcr = 0; #ifdef CONFIG_SERIAL_PCH_UART_CONSOLE pch_uart_ports[board->line_no] = priv; @@ -1623,6 +1675,12 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev, if (ret < 0) goto init_port_hal_free; +#ifdef CONFIG_DEBUG_FS + snprintf(name, sizeof(name), "uart%d_regs", board->line_no); + priv->debugfs = debugfs_create_file(name, S_IFREG | S_IRUGO, + NULL, priv, &port_regs_ops); +#endif + return priv; init_port_hal_free: @@ -1639,6 +1697,11 @@ init_port_alloc_err: static void pch_uart_exit_port(struct eg20t_port *priv) { + +#ifdef CONFIG_DEBUG_FS + if (priv->debugfs) + debugfs_remove(priv->debugfs); +#endif uart_remove_one_port(&pch_uart_driver, &priv->port); pci_set_drvdata(priv->pdev, NULL); free_page((unsigned long)priv->rxbuf.buf); @@ -1646,9 +1709,7 @@ static void pch_uart_exit_port(struct eg20t_port *priv) static void pch_uart_pci_remove(struct pci_dev *pdev) { - struct eg20t_port *priv; - - priv = (struct eg20t_port *)pci_get_drvdata(pdev); + struct eg20t_port *priv = pci_get_drvdata(pdev); pci_disable_msi(pdev); diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c index e9c2dfe4..08ebe90 100644 --- a/drivers/tty/serial/pmac_zilog.c +++ b/drivers/tty/serial/pmac_zilog.c @@ -1506,7 +1506,7 @@ no_dma: * fixed up interrupt info, but we use the device-tree directly * here due to early probing so we need the fixup too. */ - if (uap->port.irq == NO_IRQ && + if (uap->port.irq == 0 && np->parent && np->parent->parent && of_device_is_compatible(np->parent->parent, "gatwick")) { /* IRQs on gatwick are offset by 64 */ diff --git a/drivers/tty/serial/sunzilog.c b/drivers/tty/serial/sunzilog.c index 8e916e7..5a47d1b 100644 --- a/drivers/tty/serial/sunzilog.c +++ b/drivers/tty/serial/sunzilog.c @@ -1397,7 +1397,7 @@ static void __devinit sunzilog_init_hw(struct uart_sunzilog_port *up) #endif } -static int zilog_irq = -1; +static int zilog_irq; static int __devinit zs_probe(struct platform_device *op) { @@ -1425,7 +1425,7 @@ static int __devinit zs_probe(struct platform_device *op) rp = sunzilog_chip_regs[inst]; - if (zilog_irq == -1) + if (!zilog_irq) zilog_irq = op->archdata.irqs[0]; up = &sunzilog_port_table[inst * 2]; @@ -1580,7 +1580,7 @@ static int __init sunzilog_init(void) if (err) goto out_unregister_uart; - if (zilog_irq != -1) { + if (!zilog_irq) { struct uart_sunzilog_port *up = sunzilog_irq_chain; err = request_irq(zilog_irq, sunzilog_interrupt, IRQF_SHARED, "zs", sunzilog_irq_chain); @@ -1621,7 +1621,7 @@ static void __exit sunzilog_exit(void) { platform_driver_unregister(&zs_driver); - if (zilog_irq != -1) { + if (!zilog_irq) { struct uart_sunzilog_port *up = sunzilog_irq_chain; /* Disable Interrupts */ @@ -1637,7 +1637,7 @@ static void __exit sunzilog_exit(void) } free_irq(zilog_irq, sunzilog_irq_chain); - zilog_irq = -1; + zilog_irq = 0; } if (sunzilog_reg.nr) { diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c index 2ebe606..f99b0c9 100644 --- a/drivers/tty/serial/ucc_uart.c +++ b/drivers/tty/serial/ucc_uart.c @@ -1360,7 +1360,7 @@ static int ucc_uart_probe(struct platform_device *ofdev) } qe_port->port.irq = irq_of_parse_and_map(np, 0); - if (qe_port->port.irq == NO_IRQ) { + if (qe_port->port.irq == 0) { dev_err(&ofdev->dev, "could not map IRQ for UCC%u\n", qe_port->ucc_num + 1); ret = -EINVAL; diff --git a/drivers/tty/serial/vr41xx_siu.c b/drivers/tty/serial/vr41xx_siu.c index 83148e7..cf0d948 100644 --- a/drivers/tty/serial/vr41xx_siu.c +++ b/drivers/tty/serial/vr41xx_siu.c @@ -61,7 +61,7 @@ static struct uart_port siu_uart_ports[SIU_PORTS_MAX] = { [0 ... SIU_PORTS_MAX-1] = { .lock = __SPIN_LOCK_UNLOCKED(siu_uart_ports->lock), - .irq = -1, + .irq = 0, }, }; @@ -171,7 +171,7 @@ static inline unsigned int siu_check_type(struct uart_port *port) { if (port->line == 0) return PORT_VR41XX_SIU; - if (port->line == 1 && port->irq != -1) + if (port->line == 1 && port->irq) return PORT_VR41XX_DSIU; return PORT_UNKNOWN; diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c index 7867b7c..8db9125 100644 --- a/drivers/tty/sysrq.c +++ b/drivers/tty/sysrq.c @@ -322,11 +322,16 @@ static void send_sig_all(int sig) { struct task_struct *p; + read_lock(&tasklist_lock); for_each_process(p) { - if (p->mm && !is_global_init(p)) - /* Not swapper, init nor kernel thread */ - force_sig(sig, p); + if (p->flags & PF_KTHREAD) + continue; + if (is_global_init(p)) + continue; + + force_sig(sig, p); } + read_unlock(&tasklist_lock); } static void sysrq_handle_term(int key) diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index e41b9bb..ea7ebe2 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -1271,6 +1271,19 @@ int tty_init_termios(struct tty_struct *tty) } EXPORT_SYMBOL_GPL(tty_init_termios); +int tty_standard_install(struct tty_driver *driver, struct tty_struct *tty) +{ + int ret = tty_init_termios(tty); + if (ret) + return ret; + + tty_driver_kref_get(driver); + tty->count++; + driver->ttys[tty->index] = tty; + return 0; +} +EXPORT_SYMBOL_GPL(tty_standard_install); + /** * tty_driver_install_tty() - install a tty entry in the driver * @driver: the driver for the tty @@ -1286,21 +1299,8 @@ EXPORT_SYMBOL_GPL(tty_init_termios); static int tty_driver_install_tty(struct tty_driver *driver, struct tty_struct *tty) { - int idx = tty->index; - int ret; - - if (driver->ops->install) { - ret = driver->ops->install(driver, tty); - return ret; - } - - if (tty_init_termios(tty) == 0) { - tty_driver_kref_get(driver); - tty->count++; - driver->ttys[idx] = tty; - return 0; - } - return -ENOMEM; + return driver->ops->install ? driver->ops->install(driver, tty) : + tty_standard_install(driver, tty); } /** @@ -1365,7 +1365,6 @@ static int tty_reopen(struct tty_struct *tty) * @driver: tty driver we are opening a device on * @idx: device index * @ret_tty: returned tty structure - * @first_ok: ok to open a new device (used by ptmx) * * Prepare a tty device. This may not be a "new" clean device but * could also be an active device. The pty drivers require special @@ -1385,18 +1384,11 @@ static int tty_reopen(struct tty_struct *tty) * relaxed for the (most common) case of reopening a tty. */ -struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx, - int first_ok) +struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx) { struct tty_struct *tty; int retval; - /* Check if pty master is being opened multiple times */ - if (driver->subtype == PTY_TYPE_MASTER && - (driver->flags & TTY_DRIVER_DEVPTS_MEM) && !first_ok) { - return ERR_PTR(-EIO); - } - /* * First time open is complex, especially for PTY devices. * This code guarantees that either everything succeeds and the @@ -1797,11 +1789,11 @@ int tty_release(struct inode *inode, struct file *filp) * the slots and preserving the termios structure. */ release_tty(tty, idx); + tty_unlock(); /* Make this pty number available for reallocation */ if (devpts) devpts_kill_index(inode, idx); - tty_unlock(); return 0; } @@ -1950,7 +1942,7 @@ retry_open: if (retval) tty = ERR_PTR(retval); } else - tty = tty_init_dev(driver, index, 0); + tty = tty_init_dev(driver, index); mutex_unlock(&tty_mutex); if (driver) diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index 611b206..1e30cc9 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -214,15 +214,14 @@ static int serial_install(struct tty_driver *driver, struct tty_struct *tty) if (!try_module_get(serial->type->driver.owner)) goto error_module_get; - /* perform the standard setup */ - retval = tty_init_termios(tty); - if (retval) - goto error_init_termios; - retval = usb_autopm_get_interface(serial->interface); if (retval) goto error_get_interface; + retval = tty_standard_install(driver, tty); + if (retval) + goto error_init_termios; + mutex_unlock(&serial->disc_mutex); /* allow the driver to update the settings */ @@ -231,14 +230,11 @@ static int serial_install(struct tty_driver *driver, struct tty_struct *tty) tty->driver_data = port; - /* Final install (we use the default method) */ - tty_driver_kref_get(driver); - tty->count++; - driver->ttys[idx] = tty; return retval; - error_get_interface: error_init_termios: + usb_autopm_put_interface(serial->interface); + error_get_interface: module_put(serial->type->driver.owner); error_module_get: error_no_port: diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c index c4e2a58..1c6f908 100644 --- a/fs/devpts/inode.c +++ b/fs/devpts/inode.c @@ -36,7 +36,61 @@ #define DEVPTS_DEFAULT_PTMX_MODE 0000 #define PTMX_MINOR 2 -extern int pty_limit; /* Config limit on Unix98 ptys */ +/* + * sysctl support for setting limits on the number of Unix98 ptys allocated. + * Otherwise one can eat up all kernel memory by opening /dev/ptmx repeatedly. + */ +static int pty_limit = NR_UNIX98_PTY_DEFAULT; +static int pty_reserve = NR_UNIX98_PTY_RESERVE; +static int pty_limit_min; +static int pty_limit_max = INT_MAX; +static int pty_count; + +static struct ctl_table pty_table[] = { + { + .procname = "max", + .maxlen = sizeof(int), + .mode = 0644, + .data = &pty_limit, + .proc_handler = proc_dointvec_minmax, + .extra1 = &pty_limit_min, + .extra2 = &pty_limit_max, + }, { + .procname = "reserve", + .maxlen = sizeof(int), + .mode = 0644, + .data = &pty_reserve, + .proc_handler = proc_dointvec_minmax, + .extra1 = &pty_limit_min, + .extra2 = &pty_limit_max, + }, { + .procname = "nr", + .maxlen = sizeof(int), + .mode = 0444, + .data = &pty_count, + .proc_handler = proc_dointvec, + }, + {} +}; + +static struct ctl_table pty_kern_table[] = { + { + .procname = "pty", + .mode = 0555, + .child = pty_table, + }, + {} +}; + +static struct ctl_table pty_root_table[] = { + { + .procname = "kernel", + .mode = 0555, + .child = pty_kern_table, + }, + {} +}; + static DEFINE_MUTEX(allocated_ptys_lock); static struct vfsmount *devpts_mnt; @@ -49,10 +103,11 @@ struct pts_mount_opts { umode_t mode; umode_t ptmxmode; int newinstance; + int max; }; enum { - Opt_uid, Opt_gid, Opt_mode, Opt_ptmxmode, Opt_newinstance, + Opt_uid, Opt_gid, Opt_mode, Opt_ptmxmode, Opt_newinstance, Opt_max, Opt_err }; @@ -63,6 +118,7 @@ static const match_table_t tokens = { #ifdef CONFIG_DEVPTS_MULTIPLE_INSTANCES {Opt_ptmxmode, "ptmxmode=%o"}, {Opt_newinstance, "newinstance"}, + {Opt_max, "max=%d"}, #endif {Opt_err, NULL} }; @@ -109,6 +165,7 @@ static int parse_mount_options(char *data, int op, struct pts_mount_opts *opts) opts->gid = 0; opts->mode = DEVPTS_DEFAULT_MODE; opts->ptmxmode = DEVPTS_DEFAULT_PTMX_MODE; + opts->max = NR_UNIX98_PTY_MAX; /* newinstance makes sense only on initial mount */ if (op == PARSE_MOUNT) @@ -152,6 +209,12 @@ static int parse_mount_options(char *data, int op, struct pts_mount_opts *opts) if (op == PARSE_MOUNT) opts->newinstance = 1; break; + case Opt_max: + if (match_int(&args[0], &option) || + option < 0 || option > NR_UNIX98_PTY_MAX) + return -EINVAL; + opts->max = option; + break; #endif default: printk(KERN_ERR "devpts: called with bogus options\n"); @@ -258,6 +321,8 @@ static int devpts_show_options(struct seq_file *seq, struct dentry *root) seq_printf(seq, ",mode=%03o", opts->mode); #ifdef CONFIG_DEVPTS_MULTIPLE_INSTANCES seq_printf(seq, ",ptmxmode=%03o", opts->ptmxmode); + if (opts->max < NR_UNIX98_PTY_MAX) + seq_printf(seq, ",max=%d", opts->max); #endif return 0; @@ -438,6 +503,12 @@ retry: return -ENOMEM; mutex_lock(&allocated_ptys_lock); + if (pty_count >= pty_limit - + (fsi->mount_opts.newinstance ? pty_reserve : 0)) { + mutex_unlock(&allocated_ptys_lock); + return -ENOSPC; + } + ida_ret = ida_get_new(&fsi->allocated_ptys, &index); if (ida_ret < 0) { mutex_unlock(&allocated_ptys_lock); @@ -446,11 +517,12 @@ retry: return -EIO; } - if (index >= pty_limit) { + if (index >= fsi->mount_opts.max) { ida_remove(&fsi->allocated_ptys, index); mutex_unlock(&allocated_ptys_lock); - return -EIO; + return -ENOSPC; } + pty_count++; mutex_unlock(&allocated_ptys_lock); return index; } @@ -462,6 +534,7 @@ void devpts_kill_index(struct inode *ptmx_inode, int idx) mutex_lock(&allocated_ptys_lock); ida_remove(&fsi->allocated_ptys, idx); + pty_count--; mutex_unlock(&allocated_ptys_lock); } @@ -558,11 +631,15 @@ void devpts_pty_kill(struct tty_struct *tty) static int __init init_devpts_fs(void) { int err = register_filesystem(&devpts_fs_type); + struct ctl_table_header *table; + if (!err) { + table = register_sysctl_table(pty_root_table); devpts_mnt = kern_mount(&devpts_fs_type); if (IS_ERR(devpts_mnt)) { err = PTR_ERR(devpts_mnt); unregister_filesystem(&devpts_fs_type); + unregister_sysctl_table(table); } } return err; diff --git a/include/linux/altera_uart.h b/include/linux/altera_uart.h index a10a907..c022c82 100644 --- a/include/linux/altera_uart.h +++ b/include/linux/altera_uart.h @@ -5,8 +5,6 @@ #ifndef __ALTUART_H #define __ALTUART_H -#include <linux/init.h> - struct altera_uart_platform_uart { unsigned long mapbase; /* Physical address base */ unsigned int irq; /* Interrupt vector */ @@ -14,6 +12,4 @@ struct altera_uart_platform_uart { unsigned int bus_shift; /* Bus shift (address stride) */ }; -int __init early_altera_uart_setup(struct altera_uart_platform_uart *platp); - #endif /* __ALTUART_H */ diff --git a/include/linux/platform_data/efm32-uart.h b/include/linux/platform_data/efm32-uart.h new file mode 100644 index 0000000..ed0e975 --- /dev/null +++ b/include/linux/platform_data/efm32-uart.h @@ -0,0 +1,18 @@ +/* + * + * + */ +#ifndef __LINUX_PLATFORM_DATA_EFM32_UART_H__ +#define __LINUX_PLATFORM_DATA_EFM32_UART_H__ + +#include <linux/types.h> + +/** + * struct efm32_uart_pdata + * @location: pinmux location for the I/O pins (to be written to the ROUTE + * register) + */ +struct efm32_uart_pdata { + u8 location; +}; +#endif /* ifndef __LINUX_PLATFORM_DATA_EFM32_UART_H__ */ diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index c91ace7..585bfd0 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -210,6 +210,8 @@ /* Atheros AR933X SoC */ #define PORT_AR933X 99 +/* Energy Micro efm32 SoC */ +#define PORT_EFMUART 100 #ifdef __KERNEL__ diff --git a/include/linux/tty.h b/include/linux/tty.h index 5dbb3cb..a91ff40 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -52,6 +52,7 @@ * hardcoded at present.) */ #define NR_UNIX98_PTY_DEFAULT 4096 /* Default maximum for Unix98 ptys */ +#define NR_UNIX98_PTY_RESERVE 1024 /* Default reserve for main devpts */ #define NR_UNIX98_PTY_MAX (1 << MINORBITS) /* Absolute limit */ /* @@ -480,10 +481,11 @@ extern void free_tty_struct(struct tty_struct *tty); extern void initialize_tty_struct(struct tty_struct *tty, struct tty_driver *driver, int idx); extern void deinitialize_tty_struct(struct tty_struct *tty); -extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx, - int first_ok); +extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx); extern int tty_release(struct inode *inode, struct file *filp); extern int tty_init_termios(struct tty_struct *tty); +extern int tty_standard_install(struct tty_driver *driver, + struct tty_struct *tty); extern struct tty_struct *tty_pair_get_tty(struct tty_struct *tty); extern struct tty_struct *tty_pair_get_pty(struct tty_struct *tty); |
