diff options
Diffstat (limited to 'sys/arm/at91/at91_mci.c')
| -rw-r--r-- | sys/arm/at91/at91_mci.c | 60 |
1 files changed, 50 insertions, 10 deletions
diff --git a/sys/arm/at91/at91_mci.c b/sys/arm/at91/at91_mci.c index 56cff68..62c35d2 100644 --- a/sys/arm/at91/at91_mci.c +++ b/sys/arm/at91/at91_mci.c @@ -69,6 +69,11 @@ __FBSDID("$FreeBSD$"); #define BBSZ 512 +/* + * Note: This driver only supports the SlotA card. No attempt has been made + * to support SlotB. + */ + struct at91_mci_softc { void *intrhand; /* Interrupt handle */ device_t dev; @@ -244,6 +249,13 @@ at91_mci_attach(device_t dev) sc->host.host_ocr = MMC_OCR_320_330 | MMC_OCR_330_340; sc->host.caps = 0; + /* + * The in-tree Linux driver doesn't allow 4-wire operation for the + * at91rm9200, but does for other members of the family. The atmel + * patches to this do allow it, or have in the past. It is unclear + * that the hardware even works, but my boot loader uses 4-bit bus + * in polling mode successfully. + */ if (sc->sc_cap & CAP_HAS_4WIRE) sc->host.caps |= MMC_CAP_4_BIT_DATA; child = device_add_child(dev, "mmc", 0); @@ -363,9 +375,9 @@ at91_mci_update_ios(device_t brdev, device_t reqdev) clkdiv = (at91_master_clock / ios->clock) / 2; } if (ios->bus_width == bus_width_4) - WR4(sc, MCI_SDCR, RD4(sc, MCI_SDCR) | MCI_SDCR_SDCBUS); + WR4(sc, MCI_SDCR, MCI_SDCR_SDCBUS); else - WR4(sc, MCI_SDCR, RD4(sc, MCI_SDCR) & ~MCI_SDCR_SDCBUS); + WR4(sc, MCI_SDCR, 0); WR4(sc, MCI_MR, (RD4(sc, MCI_MR) & ~MCI_MR_CLKDIV) | clkdiv); /* Do we need a settle time here? */ /* XXX We need to turn the device on/off here with a GPIO pin */ @@ -407,7 +419,9 @@ at91_mci_start_cmd(struct at91_mci_softc *sc, struct mmc_command *cmd) if (!data) { // The no data case is fairly simple at91_mci_pdc_disable(sc); -// printf("CMDR %x ARGR %x\n", cmdr, cmd->arg); +#ifdef AT91_MCI_DEBUG + printf("CMDR %x ARGR %x\n", cmdr, cmd->arg); +#endif WR4(sc, MCI_ARGR, cmd->arg); WR4(sc, MCI_CMDR, cmdr); WR4(sc, MCI_IER, MCI_SR_ERROR | MCI_SR_CMDRDY); @@ -479,7 +493,9 @@ at91_mci_start_cmd(struct at91_mci_softc *sc, struct mmc_command *cmd) ier = MCI_SR_TXBUFE; } } -// printf("CMDR %x ARGR %x with data\n", cmdr, cmd->arg); +#ifdef AT91_MCI_DEBUG + printf("CMDR %x ARGR %x with data\n", cmdr, cmd->arg); +#endif WR4(sc, MCI_ARGR, cmd->arg); if (cmdr & MCI_CMDR_TRCMD_START) { if (cmdr & MCI_CMDR_TRDIR) { @@ -518,6 +534,14 @@ at91_mci_start(struct at91_mci_softc *sc) sc->req = NULL; sc->curcmd = NULL; req->done(req); + /* + * Attempted hack-a-round for the DMA bug for multiple reads. + */ + if (req->cmd->opcode == MMC_READ_MULTIPLE_BLOCK) { + at91_mci_fini(sc->dev); + at91_mci_init(sc->dev); + at91_mci_update_ios(sc->dev, NULL); + } } static int @@ -578,7 +602,9 @@ at91_mci_read_done(struct at91_mci_softc *sc) uint32_t *walker; struct mmc_command *cmd; int i, len; - +#ifdef AT91_MCI_DEBUG + char *w2; +#endif cmd = sc->curcmd; bus_dmamap_sync(sc->dmatag, sc->map, BUS_DMASYNC_POSTREAD); bus_dmamap_unload(sc->dmatag, sc->map); @@ -589,6 +615,15 @@ at91_mci_read_done(struct at91_mci_softc *sc) for (i = 0; i < len; i++) walker[i] = bswap32(walker[i]); } +#ifdef AT91_MCI_DEBUG + printf("Read data\n"); + for (i = 0, w2 = cmd->data->data; i < cmd->data->len; i++) { + if (i % 16 == 0) + printf("%08x ", cmd->arg + i); + printf("%02x%s", w2[i], (i + 1) % 16 ? " " : "\n"); + } + printf("\n"); +#endif // Finish up the sequence... WR4(sc, MCI_IDR, MCI_SR_ENDRX); WR4(sc, MCI_IER, MCI_SR_RXBUFF); @@ -624,14 +659,19 @@ at91_mci_intr(void *arg) if ((sr & MCI_SR_RCRCE) && (cmd->opcode == MMC_SEND_OP_COND || cmd->opcode == ACMD_SD_SEND_OP_COND)) cmd->error = MMC_ERR_NONE; - else if (sr & (MCI_SR_RTOE | MCI_SR_DTOE)) + else if (sr & (MCI_SR_RTOE | MCI_SR_DTOE)) { + printf("TIMEOUT %#x\n", sr); cmd->error = MMC_ERR_TIMEOUT; - else if (sr & (MCI_SR_RCRCE | MCI_SR_DCRCE)) + } else if (sr & (MCI_SR_RCRCE | MCI_SR_DCRCE)) { + printf("CRC %#x\n", sr); cmd->error = MMC_ERR_BADCRC; - else if (sr & (MCI_SR_OVRE | MCI_SR_UNRE)) + } else if (sr & (MCI_SR_OVRE | MCI_SR_UNRE)) { + printf("FIFO %#x\n", sr); cmd->error = MMC_ERR_FIFO; - else + } else { + printf("FAILED %#x\n", sr); cmd->error = MMC_ERR_FAILED; + } done = 1; if (sc->mapped && cmd->error) { bus_dmamap_unload(sc->dmatag, sc->map); @@ -743,7 +783,7 @@ at91_mci_read_ivar(device_t bus, device_t child, int which, uintptr_t *result) *(int *)result = sc->host.caps; break; case MMCBR_IVAR_MAX_DATA: - *(int *)result = 1; + *(int *)result = 1024; break; } return (0); |
