diff options
Diffstat (limited to 'src/hw/sd/pxa2xx_mmci.c')
| -rw-r--r-- | src/hw/sd/pxa2xx_mmci.c | 504 |
1 files changed, 504 insertions, 0 deletions
diff --git a/src/hw/sd/pxa2xx_mmci.c b/src/hw/sd/pxa2xx_mmci.c new file mode 100644 index 0000000..b217080 --- /dev/null +++ b/src/hw/sd/pxa2xx_mmci.c @@ -0,0 +1,504 @@ +/* + * Intel XScale PXA255/270 MultiMediaCard/SD/SDIO Controller emulation. + * + * Copyright (c) 2006 Openedhand Ltd. + * Written by Andrzej Zaborowski <balrog@zabor.org> + * + * This code is licensed under the GPLv2. + * + * Contributions after 2012-01-13 are licensed under the terms of the + * GNU GPL, version 2 or (at your option) any later version. + */ + +#include "hw/hw.h" +#include "hw/arm/pxa.h" +#include "hw/sd/sd.h" +#include "hw/qdev.h" + +struct PXA2xxMMCIState { + MemoryRegion iomem; + qemu_irq irq; + qemu_irq rx_dma; + qemu_irq tx_dma; + + SDState *card; + + uint32_t status; + uint32_t clkrt; + uint32_t spi; + uint32_t cmdat; + uint32_t resp_tout; + uint32_t read_tout; + int blklen; + int numblk; + uint32_t intmask; + uint32_t intreq; + int cmd; + uint32_t arg; + + int active; + int bytesleft; + uint8_t tx_fifo[64]; + int tx_start; + int tx_len; + uint8_t rx_fifo[32]; + int rx_start; + int rx_len; + uint16_t resp_fifo[9]; + int resp_len; + + int cmdreq; +}; + +#define MMC_STRPCL 0x00 /* MMC Clock Start/Stop register */ +#define MMC_STAT 0x04 /* MMC Status register */ +#define MMC_CLKRT 0x08 /* MMC Clock Rate register */ +#define MMC_SPI 0x0c /* MMC SPI Mode register */ +#define MMC_CMDAT 0x10 /* MMC Command/Data register */ +#define MMC_RESTO 0x14 /* MMC Response Time-Out register */ +#define MMC_RDTO 0x18 /* MMC Read Time-Out register */ +#define MMC_BLKLEN 0x1c /* MMC Block Length register */ +#define MMC_NUMBLK 0x20 /* MMC Number of Blocks register */ +#define MMC_PRTBUF 0x24 /* MMC Buffer Partly Full register */ +#define MMC_I_MASK 0x28 /* MMC Interrupt Mask register */ +#define MMC_I_REG 0x2c /* MMC Interrupt Request register */ +#define MMC_CMD 0x30 /* MMC Command register */ +#define MMC_ARGH 0x34 /* MMC Argument High register */ +#define MMC_ARGL 0x38 /* MMC Argument Low register */ +#define MMC_RES 0x3c /* MMC Response FIFO */ +#define MMC_RXFIFO 0x40 /* MMC Receive FIFO */ +#define MMC_TXFIFO 0x44 /* MMC Transmit FIFO */ +#define MMC_RDWAIT 0x48 /* MMC RD_WAIT register */ +#define MMC_BLKS_REM 0x4c /* MMC Blocks Remaining register */ + +/* Bitfield masks */ +#define STRPCL_STOP_CLK (1 << 0) +#define STRPCL_STRT_CLK (1 << 1) +#define STAT_TOUT_RES (1 << 1) +#define STAT_CLK_EN (1 << 8) +#define STAT_DATA_DONE (1 << 11) +#define STAT_PRG_DONE (1 << 12) +#define STAT_END_CMDRES (1 << 13) +#define SPI_SPI_MODE (1 << 0) +#define CMDAT_RES_TYPE (3 << 0) +#define CMDAT_DATA_EN (1 << 2) +#define CMDAT_WR_RD (1 << 3) +#define CMDAT_DMA_EN (1 << 7) +#define CMDAT_STOP_TRAN (1 << 10) +#define INT_DATA_DONE (1 << 0) +#define INT_PRG_DONE (1 << 1) +#define INT_END_CMD (1 << 2) +#define INT_STOP_CMD (1 << 3) +#define INT_CLK_OFF (1 << 4) +#define INT_RXFIFO_REQ (1 << 5) +#define INT_TXFIFO_REQ (1 << 6) +#define INT_TINT (1 << 7) +#define INT_DAT_ERR (1 << 8) +#define INT_RES_ERR (1 << 9) +#define INT_RD_STALLED (1 << 10) +#define INT_SDIO_INT (1 << 11) +#define INT_SDIO_SACK (1 << 12) +#define PRTBUF_PRT_BUF (1 << 0) + +/* Route internal interrupt lines to the global IC and DMA */ +static void pxa2xx_mmci_int_update(PXA2xxMMCIState *s) +{ + uint32_t mask = s->intmask; + if (s->cmdat & CMDAT_DMA_EN) { + mask |= INT_RXFIFO_REQ | INT_TXFIFO_REQ; + + qemu_set_irq(s->rx_dma, !!(s->intreq & INT_RXFIFO_REQ)); + qemu_set_irq(s->tx_dma, !!(s->intreq & INT_TXFIFO_REQ)); + } + + qemu_set_irq(s->irq, !!(s->intreq & ~mask)); +} + +static void pxa2xx_mmci_fifo_update(PXA2xxMMCIState *s) +{ + if (!s->active) + return; + + if (s->cmdat & CMDAT_WR_RD) { + while (s->bytesleft && s->tx_len) { + sd_write_data(s->card, s->tx_fifo[s->tx_start ++]); + s->tx_start &= 0x1f; + s->tx_len --; + s->bytesleft --; + } + if (s->bytesleft) + s->intreq |= INT_TXFIFO_REQ; + } else + while (s->bytesleft && s->rx_len < 32) { + s->rx_fifo[(s->rx_start + (s->rx_len ++)) & 0x1f] = + sd_read_data(s->card); + s->bytesleft --; + s->intreq |= INT_RXFIFO_REQ; + } + + if (!s->bytesleft) { + s->active = 0; + s->intreq |= INT_DATA_DONE; + s->status |= STAT_DATA_DONE; + + if (s->cmdat & CMDAT_WR_RD) { + s->intreq |= INT_PRG_DONE; + s->status |= STAT_PRG_DONE; + } + } + + pxa2xx_mmci_int_update(s); +} + +static void pxa2xx_mmci_wakequeues(PXA2xxMMCIState *s) +{ + int rsplen, i; + SDRequest request; + uint8_t response[16]; + + s->active = 1; + s->rx_len = 0; + s->tx_len = 0; + s->cmdreq = 0; + + request.cmd = s->cmd; + request.arg = s->arg; + request.crc = 0; /* FIXME */ + + rsplen = sd_do_command(s->card, &request, response); + s->intreq |= INT_END_CMD; + + memset(s->resp_fifo, 0, sizeof(s->resp_fifo)); + switch (s->cmdat & CMDAT_RES_TYPE) { +#define PXAMMCI_RESP(wd, value0, value1) \ + s->resp_fifo[(wd) + 0] |= (value0); \ + s->resp_fifo[(wd) + 1] |= (value1) << 8; + case 0: /* No response */ + goto complete; + + case 1: /* R1, R4, R5 or R6 */ + if (rsplen < 4) + goto timeout; + goto complete; + + case 2: /* R2 */ + if (rsplen < 16) + goto timeout; + goto complete; + + case 3: /* R3 */ + if (rsplen < 4) + goto timeout; + goto complete; + + complete: + for (i = 0; rsplen > 0; i ++, rsplen -= 2) { + PXAMMCI_RESP(i, response[i * 2], response[i * 2 + 1]); + } + s->status |= STAT_END_CMDRES; + + if (!(s->cmdat & CMDAT_DATA_EN)) + s->active = 0; + else + s->bytesleft = s->numblk * s->blklen; + + s->resp_len = 0; + break; + + timeout: + s->active = 0; + s->status |= STAT_TOUT_RES; + break; + } + + pxa2xx_mmci_fifo_update(s); +} + +static uint64_t pxa2xx_mmci_read(void *opaque, hwaddr offset, unsigned size) +{ + PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque; + uint32_t ret; + + switch (offset) { + case MMC_STRPCL: + return 0; + case MMC_STAT: + return s->status; + case MMC_CLKRT: + return s->clkrt; + case MMC_SPI: + return s->spi; + case MMC_CMDAT: + return s->cmdat; + case MMC_RESTO: + return s->resp_tout; + case MMC_RDTO: + return s->read_tout; + case MMC_BLKLEN: + return s->blklen; + case MMC_NUMBLK: + return s->numblk; + case MMC_PRTBUF: + return 0; + case MMC_I_MASK: + return s->intmask; + case MMC_I_REG: + return s->intreq; + case MMC_CMD: + return s->cmd | 0x40; + case MMC_ARGH: + return s->arg >> 16; + case MMC_ARGL: + return s->arg & 0xffff; + case MMC_RES: + if (s->resp_len < 9) + return s->resp_fifo[s->resp_len ++]; + return 0; + case MMC_RXFIFO: + ret = 0; + while (size-- && s->rx_len) { + ret |= s->rx_fifo[s->rx_start++] << (size << 3); + s->rx_start &= 0x1f; + s->rx_len --; + } + s->intreq &= ~INT_RXFIFO_REQ; + pxa2xx_mmci_fifo_update(s); + return ret; + case MMC_RDWAIT: + return 0; + case MMC_BLKS_REM: + return s->numblk; + default: + hw_error("%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset); + } + + return 0; +} + +static void pxa2xx_mmci_write(void *opaque, + hwaddr offset, uint64_t value, unsigned size) +{ + PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque; + + switch (offset) { + case MMC_STRPCL: + if (value & STRPCL_STRT_CLK) { + s->status |= STAT_CLK_EN; + s->intreq &= ~INT_CLK_OFF; + + if (s->cmdreq && !(s->cmdat & CMDAT_STOP_TRAN)) { + s->status &= STAT_CLK_EN; + pxa2xx_mmci_wakequeues(s); + } + } + + if (value & STRPCL_STOP_CLK) { + s->status &= ~STAT_CLK_EN; + s->intreq |= INT_CLK_OFF; + s->active = 0; + } + + pxa2xx_mmci_int_update(s); + break; + + case MMC_CLKRT: + s->clkrt = value & 7; + break; + + case MMC_SPI: + s->spi = value & 0xf; + if (value & SPI_SPI_MODE) + printf("%s: attempted to use card in SPI mode\n", __FUNCTION__); + break; + + case MMC_CMDAT: + s->cmdat = value & 0x3dff; + s->active = 0; + s->cmdreq = 1; + if (!(value & CMDAT_STOP_TRAN)) { + s->status &= STAT_CLK_EN; + + if (s->status & STAT_CLK_EN) + pxa2xx_mmci_wakequeues(s); + } + + pxa2xx_mmci_int_update(s); + break; + + case MMC_RESTO: + s->resp_tout = value & 0x7f; + break; + + case MMC_RDTO: + s->read_tout = value & 0xffff; + break; + + case MMC_BLKLEN: + s->blklen = value & 0xfff; + break; + + case MMC_NUMBLK: + s->numblk = value & 0xffff; + break; + + case MMC_PRTBUF: + if (value & PRTBUF_PRT_BUF) { + s->tx_start ^= 32; + s->tx_len = 0; + } + pxa2xx_mmci_fifo_update(s); + break; + + case MMC_I_MASK: + s->intmask = value & 0x1fff; + pxa2xx_mmci_int_update(s); + break; + + case MMC_CMD: + s->cmd = value & 0x3f; + break; + + case MMC_ARGH: + s->arg &= 0x0000ffff; + s->arg |= value << 16; + break; + + case MMC_ARGL: + s->arg &= 0xffff0000; + s->arg |= value & 0x0000ffff; + break; + + case MMC_TXFIFO: + while (size-- && s->tx_len < 0x20) + s->tx_fifo[(s->tx_start + (s->tx_len ++)) & 0x1f] = + (value >> (size << 3)) & 0xff; + s->intreq &= ~INT_TXFIFO_REQ; + pxa2xx_mmci_fifo_update(s); + break; + + case MMC_RDWAIT: + case MMC_BLKS_REM: + break; + + default: + hw_error("%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset); + } +} + +static const MemoryRegionOps pxa2xx_mmci_ops = { + .read = pxa2xx_mmci_read, + .write = pxa2xx_mmci_write, + .endianness = DEVICE_NATIVE_ENDIAN, +}; + +static void pxa2xx_mmci_save(QEMUFile *f, void *opaque) +{ + PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque; + int i; + + qemu_put_be32s(f, &s->status); + qemu_put_be32s(f, &s->clkrt); + qemu_put_be32s(f, &s->spi); + qemu_put_be32s(f, &s->cmdat); + qemu_put_be32s(f, &s->resp_tout); + qemu_put_be32s(f, &s->read_tout); + qemu_put_be32(f, s->blklen); + qemu_put_be32(f, s->numblk); + qemu_put_be32s(f, &s->intmask); + qemu_put_be32s(f, &s->intreq); + qemu_put_be32(f, s->cmd); + qemu_put_be32s(f, &s->arg); + qemu_put_be32(f, s->cmdreq); + qemu_put_be32(f, s->active); + qemu_put_be32(f, s->bytesleft); + + qemu_put_byte(f, s->tx_len); + for (i = 0; i < s->tx_len; i ++) + qemu_put_byte(f, s->tx_fifo[(s->tx_start + i) & 63]); + + qemu_put_byte(f, s->rx_len); + for (i = 0; i < s->rx_len; i ++) + qemu_put_byte(f, s->rx_fifo[(s->rx_start + i) & 31]); + + qemu_put_byte(f, s->resp_len); + for (i = s->resp_len; i < 9; i ++) + qemu_put_be16s(f, &s->resp_fifo[i]); +} + +static int pxa2xx_mmci_load(QEMUFile *f, void *opaque, int version_id) +{ + PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque; + int i; + + qemu_get_be32s(f, &s->status); + qemu_get_be32s(f, &s->clkrt); + qemu_get_be32s(f, &s->spi); + qemu_get_be32s(f, &s->cmdat); + qemu_get_be32s(f, &s->resp_tout); + qemu_get_be32s(f, &s->read_tout); + s->blklen = qemu_get_be32(f); + s->numblk = qemu_get_be32(f); + qemu_get_be32s(f, &s->intmask); + qemu_get_be32s(f, &s->intreq); + s->cmd = qemu_get_be32(f); + qemu_get_be32s(f, &s->arg); + s->cmdreq = qemu_get_be32(f); + s->active = qemu_get_be32(f); + s->bytesleft = qemu_get_be32(f); + + s->tx_len = qemu_get_byte(f); + s->tx_start = 0; + if (s->tx_len >= sizeof(s->tx_fifo) || s->tx_len < 0) + return -EINVAL; + for (i = 0; i < s->tx_len; i ++) + s->tx_fifo[i] = qemu_get_byte(f); + + s->rx_len = qemu_get_byte(f); + s->rx_start = 0; + if (s->rx_len >= sizeof(s->rx_fifo) || s->rx_len < 0) + return -EINVAL; + for (i = 0; i < s->rx_len; i ++) + s->rx_fifo[i] = qemu_get_byte(f); + + s->resp_len = qemu_get_byte(f); + if (s->resp_len > 9 || s->resp_len < 0) + return -EINVAL; + for (i = s->resp_len; i < 9; i ++) + qemu_get_be16s(f, &s->resp_fifo[i]); + + return 0; +} + +PXA2xxMMCIState *pxa2xx_mmci_init(MemoryRegion *sysmem, + hwaddr base, + BlockBackend *blk, qemu_irq irq, + qemu_irq rx_dma, qemu_irq tx_dma) +{ + PXA2xxMMCIState *s; + + s = (PXA2xxMMCIState *) g_malloc0(sizeof(PXA2xxMMCIState)); + s->irq = irq; + s->rx_dma = rx_dma; + s->tx_dma = tx_dma; + + memory_region_init_io(&s->iomem, NULL, &pxa2xx_mmci_ops, s, + "pxa2xx-mmci", 0x00100000); + memory_region_add_subregion(sysmem, base, &s->iomem); + + /* Instantiate the actual storage */ + s->card = sd_init(blk, false); + if (s->card == NULL) { + exit(1); + } + + register_savevm(NULL, "pxa2xx_mmci", 0, 0, + pxa2xx_mmci_save, pxa2xx_mmci_load, s); + + return s; +} + +void pxa2xx_mmci_handlers(PXA2xxMMCIState *s, qemu_irq readonly, + qemu_irq coverswitch) +{ + sd_set_cb(s->card, readonly, coverswitch); +} |
