diff options
author | Wolfgang Denk <wd@denx.de> | 2011-11-16 19:53:37 +0100 |
---|---|---|
committer | Wolfgang Denk <wd@denx.de> | 2011-11-16 19:53:37 +0100 |
commit | e4ed004b65caf6e79117b9ff2648f7b7c3afe58d (patch) | |
tree | 70c79335c33a3b79d42b27826820c8ba17b85ffd | |
parent | 37f2fe7472a34531e7d585eb7e0730b4f8e1f213 (diff) | |
parent | 0963ff3a97ff63e85465008895a68eb2e1cdf112 (diff) |
Merge branch 'master' of /home/wd/git/u-boot/custodians
* 'master' of /home/wd/git/u-boot/custodians:
Tegra2: mmc: Factor out mmc_wait_inhibit functionality
Tegra2: mmc: Add data transfer completion timeout
Tegra2: mmc: Support DMA restarts at buffer boundaries
Tegra2: mmc: define register field values in tegra2_mmc.h
MMC: PL180: Fix infinite loop with VExpress extended fifo implementation
-rw-r--r-- | drivers/mmc/arm_pl180_mmci.c | 26 | ||||
-rw-r--r-- | drivers/mmc/tegra2_mmc.c | 130 | ||||
-rw-r--r-- | drivers/mmc/tegra2_mmc.h | 49 |
3 files changed, 134 insertions, 71 deletions
diff --git a/drivers/mmc/arm_pl180_mmci.c b/drivers/mmc/arm_pl180_mmci.c index ed296ee026..e6467a2d18 100644 --- a/drivers/mmc/arm_pl180_mmci.c +++ b/drivers/mmc/arm_pl180_mmci.c @@ -111,7 +111,6 @@ static int do_command(struct mmc *dev, struct mmc_cmd *cmd) static int read_bytes(struct mmc *dev, u32 *dest, u32 blkcount, u32 blksize) { u32 *tempbuff = dest; - int i; u64 xfercount = blkcount * blksize; struct mmc_host *host = dev->priv; u32 status, status_err; @@ -121,31 +120,6 @@ static int read_bytes(struct mmc *dev, u32 *dest, u32 blkcount, u32 blksize) status = readl(&host->base->status); status_err = status & (SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT | SDI_STA_RXOVERR); - while (!status_err && - (xfercount >= SDI_FIFO_BURST_SIZE * sizeof(u32))) { - if (status & SDI_STA_RXFIFOBR) { - for (i = 0; i < SDI_FIFO_BURST_SIZE; i++) - *(tempbuff + i) = readl(&host->base->fifo); - tempbuff += SDI_FIFO_BURST_SIZE; - xfercount -= SDI_FIFO_BURST_SIZE * sizeof(u32); - } - status = readl(&host->base->status); - status_err = status & - (SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT | SDI_STA_RXOVERR); - } - - if (status & SDI_STA_DTIMEOUT) { - printf("Read data timed out, xfercount: %llu, status: 0x%08X\n", - xfercount, status); - return -ETIMEDOUT; - } else if (status & SDI_STA_DCRCFAIL) { - printf("Read data blk CRC error: 0x%x\n", status); - return -EILSEQ; - } else if (status & SDI_STA_RXOVERR) { - printf("Read data RX overflow error\n"); - return -EIO; - } - while ((!status_err) && (xfercount >= sizeof(u32))) { if (status & SDI_STA_RXDAVL) { *(tempbuff) = readl(&host->base->fifo); diff --git a/drivers/mmc/tegra2_mmc.c b/drivers/mmc/tegra2_mmc.c index 78b11900ed..ccf48bbb17 100644 --- a/drivers/mmc/tegra2_mmc.c +++ b/drivers/mmc/tegra2_mmc.c @@ -81,7 +81,8 @@ static void mmc_prepare_data(struct mmc_host *host, struct mmc_data *data) * 11 = Selects 64-bit Address ADMA2 */ ctrl = readb(&host->reg->hostctl); - ctrl &= ~(3 << 3); /* SDMA */ + ctrl &= ~TEGRA_MMC_HOSTCTL_DMASEL_MASK; + ctrl |= TEGRA_MMC_HOSTCTL_DMASEL_SDMA; writeb(ctrl, &host->reg->hostctl); /* We do not handle DMA boundaries, so set it to max (512 KiB) */ @@ -103,43 +104,36 @@ static void mmc_set_transfer_mode(struct mmc_host *host, struct mmc_data *data) * ENBLKCNT[1] : Block Count Enable * ENDMA[0] : DMA Enable */ - mode = (1 << 1) | (1 << 0); + mode = (TEGRA_MMC_TRNMOD_DMA_ENABLE | + TEGRA_MMC_TRNMOD_BLOCK_COUNT_ENABLE); + if (data->blocks > 1) - mode |= (1 << 5); + mode |= TEGRA_MMC_TRNMOD_MULTI_BLOCK_SELECT; + if (data->flags & MMC_DATA_READ) - mode |= (1 << 4); + mode |= TEGRA_MMC_TRNMOD_DATA_XFER_DIR_SEL_READ; writew(mode, &host->reg->trnmod); } -static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, - struct mmc_data *data) +static int mmc_wait_inhibit(struct mmc_host *host, + struct mmc_cmd *cmd, + struct mmc_data *data, + unsigned int timeout) { - struct mmc_host *host = (struct mmc_host *)mmc->priv; - int flags, i; - unsigned int timeout; - unsigned int mask; - unsigned int retry = 0x100000; - debug(" mmc_send_cmd called\n"); - - /* Wait max 10 ms */ - timeout = 10; - /* * PRNSTS - * CMDINHDAT[1] : Command Inhibit (DAT) - * CMDINHCMD[0] : Command Inhibit (CMD) + * CMDINHDAT[1] : Command Inhibit (DAT) + * CMDINHCMD[0] : Command Inhibit (CMD) */ - mask = (1 << 0); - if ((data != NULL) || (cmd->resp_type & MMC_RSP_BUSY)) - mask |= (1 << 1); + unsigned int mask = TEGRA_MMC_PRNSTS_CMD_INHIBIT_CMD; /* * We shouldn't wait for data inhibit for stop commands, even * though they might use busy signaling */ - if (data) - mask &= ~(1 << 1); + if ((data == NULL) && (cmd->resp_type & MMC_RSP_BUSY)) + mask |= TEGRA_MMC_PRNSTS_CMD_INHIBIT_DAT; while (readl(&host->reg->prnsts) & mask) { if (timeout == 0) { @@ -150,6 +144,24 @@ static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, udelay(1000); } + return 0; +} + +static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, + struct mmc_data *data) +{ + struct mmc_host *host = (struct mmc_host *)mmc->priv; + int flags, i; + int result; + unsigned int mask; + unsigned int retry = 0x100000; + debug(" mmc_send_cmd called\n"); + + result = mmc_wait_inhibit(host, cmd, data, 10 /* ms */); + + if (result < 0) + return result; + if (data) mmc_prepare_data(host, data); @@ -175,20 +187,20 @@ static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, * 11 = Length 48 Check busy after response */ if (!(cmd->resp_type & MMC_RSP_PRESENT)) - flags = 0; + flags = TEGRA_MMC_CMDREG_RESP_TYPE_SELECT_NO_RESPONSE; else if (cmd->resp_type & MMC_RSP_136) - flags = (1 << 0); + flags = TEGRA_MMC_CMDREG_RESP_TYPE_SELECT_LENGTH_136; else if (cmd->resp_type & MMC_RSP_BUSY) - flags = (3 << 0); + flags = TEGRA_MMC_CMDREG_RESP_TYPE_SELECT_LENGTH_48_BUSY; else - flags = (2 << 0); + flags = TEGRA_MMC_CMDREG_RESP_TYPE_SELECT_LENGTH_48; if (cmd->resp_type & MMC_RSP_CRC) - flags |= (1 << 3); + flags |= TEGRA_MMC_TRNMOD_CMD_CRC_CHECK; if (cmd->resp_type & MMC_RSP_OPCODE) - flags |= (1 << 4); + flags |= TEGRA_MMC_TRNMOD_CMD_INDEX_CHECK; if (data) - flags |= (1 << 5); + flags |= TEGRA_MMC_TRNMOD_DATA_PRESENT_SELECT_DATA_TRANSFER; debug("cmd: %d\n", cmd->cmdidx); @@ -197,7 +209,7 @@ static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, for (i = 0; i < retry; i++) { mask = readl(&host->reg->norintsts); /* Command Complete */ - if (mask & (1 << 0)) { + if (mask & TEGRA_MMC_NORINTSTS_CMD_COMPLETE) { if (!data) writel(mask, &host->reg->norintsts); break; @@ -209,11 +221,11 @@ static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, return TIMEOUT; } - if (mask & (1 << 16)) { + if (mask & TEGRA_MMC_NORINTSTS_CMD_TIMEOUT) { /* Timeout Error */ debug("timeout: %08x cmd %d\n", mask, cmd->cmdidx); return TIMEOUT; - } else if (mask & (1 << 15)) { + } else if (mask & TEGRA_MMC_NORINTSTS_ERR_INTERRUPT) { /* Error Interrupt */ debug("error: %08x cmd %d\n", mask, cmd->cmdidx); return -1; @@ -256,23 +268,44 @@ static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, } if (data) { + unsigned long start = get_timer(0); + while (1) { mask = readl(&host->reg->norintsts); - if (mask & (1 << 15)) { + if (mask & TEGRA_MMC_NORINTSTS_ERR_INTERRUPT) { /* Error Interrupt */ writel(mask, &host->reg->norintsts); printf("%s: error during transfer: 0x%08x\n", __func__, mask); return -1; - } else if (mask & (1 << 3)) { - /* DMA Interrupt */ + } else if (mask & TEGRA_MMC_NORINTSTS_DMA_INTERRUPT) { + /* + * DMA Interrupt, restart the transfer where + * it was interrupted. + */ + unsigned int address = readl(&host->reg->sysad); + debug("DMA end\n"); - break; - } else if (mask & (1 << 1)) { + writel(TEGRA_MMC_NORINTSTS_DMA_INTERRUPT, + &host->reg->norintsts); + writel(address, &host->reg->sysad); + } else if (mask & TEGRA_MMC_NORINTSTS_XFER_COMPLETE) { /* Transfer Complete */ debug("r/w is done\n"); break; + } else if (get_timer(start) > 2000UL) { + writel(mask, &host->reg->norintsts); + printf("%s: MMC Timeout\n" + " Interrupt status 0x%08x\n" + " Interrupt status enable 0x%08x\n" + " Interrupt signal enable 0x%08x\n" + " Present status 0x%08x\n", + __func__, mask, + readl(&host->reg->norintstsen), + readl(&host->reg->norintsigen), + readl(&host->reg->prnsts)); + return -1; } } writel(mask, &host->reg->norintsts); @@ -310,12 +343,14 @@ static void mmc_change_clock(struct mmc_host *host, uint clock) * ENINTCLK[0] : Internal Clock Enable */ div >>= 1; - clk = (div << 8) | (1 << 0); + clk = ((div << TEGRA_MMC_CLKCON_SDCLK_FREQ_SEL_SHIFT) | + TEGRA_MMC_CLKCON_INTERNAL_CLOCK_ENABLE); writew(clk, &host->reg->clkcon); /* Wait max 10 ms */ timeout = 10; - while (!(readw(&host->reg->clkcon) & (1 << 1))) { + while (!(readw(&host->reg->clkcon) & + TEGRA_MMC_CLKCON_INTERNAL_CLOCK_STABLE)) { if (timeout == 0) { printf("%s: timeout error\n", __func__); return; @@ -324,7 +359,7 @@ static void mmc_change_clock(struct mmc_host *host, uint clock) udelay(1000); } - clk |= (1 << 2); + clk |= TEGRA_MMC_CLKCON_SD_CLOCK_ENABLE; writew(clk, &host->reg->clkcon); debug("mmc_change_clock: clkcon = %08X\n", clk); @@ -375,7 +410,7 @@ static void mmc_reset(struct mmc_host *host) * 1 = reset * 0 = work */ - writeb((1 << 0), &host->reg->swrst); + writeb(TEGRA_MMC_SWRST_SW_RESET_FOR_ALL, &host->reg->swrst); host->clock = 0; @@ -383,7 +418,7 @@ static void mmc_reset(struct mmc_host *host) timeout = 100; /* hw clears the bit when it's done */ - while (readb(&host->reg->swrst) & (1 << 0)) { + while (readb(&host->reg->swrst) & TEGRA_MMC_SWRST_SW_RESET_FOR_ALL) { if (timeout == 0) { printf("%s: timeout error\n", __func__); return; @@ -413,12 +448,17 @@ static int mmc_core_init(struct mmc *mmc) * NORMAL Interrupt Status Enable Register init * [5] ENSTABUFRDRDY : Buffer Read Ready Status Enable * [4] ENSTABUFWTRDY : Buffer write Ready Status Enable + * [3] ENSTADMAINT : DMA boundary interrupt * [1] ENSTASTANSCMPLT : Transfre Complete Status Enable * [0] ENSTACMDCMPLT : Command Complete Status Enable */ mask = readl(&host->reg->norintstsen); mask &= ~(0xffff); - mask |= (1 << 5) | (1 << 4) | (1 << 1) | (1 << 0); + mask |= (TEGRA_MMC_NORINTSTSEN_CMD_COMPLETE | + TEGRA_MMC_NORINTSTSEN_XFER_COMPLETE | + TEGRA_MMC_NORINTSTSEN_DMA_INTERRUPT | + TEGRA_MMC_NORINTSTSEN_BUFFER_WRITE_READY | + TEGRA_MMC_NORINTSTSEN_BUFFER_READ_READY); writel(mask, &host->reg->norintstsen); /* @@ -427,7 +467,7 @@ static int mmc_core_init(struct mmc *mmc) */ mask = readl(&host->reg->norintsigen); mask &= ~(0xffff); - mask |= (1 << 1); + mask |= TEGRA_MMC_NORINTSIGEN_XFER_COMPLETE; writel(mask, &host->reg->norintsigen); return 0; diff --git a/drivers/mmc/tegra2_mmc.h b/drivers/mmc/tegra2_mmc.h index 28698e0fc0..671583c422 100644 --- a/drivers/mmc/tegra2_mmc.h +++ b/drivers/mmc/tegra2_mmc.h @@ -68,6 +68,55 @@ struct tegra2_mmc { unsigned char res6[0x100]; /* RESERVED, offset 100h-1FFh */ }; +#define TEGRA_MMC_HOSTCTL_DMASEL_MASK (3 << 3) +#define TEGRA_MMC_HOSTCTL_DMASEL_SDMA (0 << 3) +#define TEGRA_MMC_HOSTCTL_DMASEL_ADMA2_32BIT (2 << 3) +#define TEGRA_MMC_HOSTCTL_DMASEL_ADMA2_64BIT (3 << 3) + +#define TEGRA_MMC_TRNMOD_DMA_ENABLE (1 << 0) +#define TEGRA_MMC_TRNMOD_BLOCK_COUNT_ENABLE (1 << 1) +#define TEGRA_MMC_TRNMOD_DATA_XFER_DIR_SEL_WRITE (0 << 4) +#define TEGRA_MMC_TRNMOD_DATA_XFER_DIR_SEL_READ (1 << 4) +#define TEGRA_MMC_TRNMOD_MULTI_BLOCK_SELECT (1 << 5) + +#define TEGRA_MMC_CMDREG_RESP_TYPE_SELECT_MASK (3 << 0) +#define TEGRA_MMC_CMDREG_RESP_TYPE_SELECT_NO_RESPONSE (0 << 0) +#define TEGRA_MMC_CMDREG_RESP_TYPE_SELECT_LENGTH_136 (1 << 0) +#define TEGRA_MMC_CMDREG_RESP_TYPE_SELECT_LENGTH_48 (2 << 0) +#define TEGRA_MMC_CMDREG_RESP_TYPE_SELECT_LENGTH_48_BUSY (3 << 0) + +#define TEGRA_MMC_TRNMOD_CMD_CRC_CHECK (1 << 3) +#define TEGRA_MMC_TRNMOD_CMD_INDEX_CHECK (1 << 4) +#define TEGRA_MMC_TRNMOD_DATA_PRESENT_SELECT_DATA_TRANSFER (1 << 5) + +#define TEGRA_MMC_PRNSTS_CMD_INHIBIT_CMD (1 << 0) +#define TEGRA_MMC_PRNSTS_CMD_INHIBIT_DAT (1 << 1) + +#define TEGRA_MMC_CLKCON_INTERNAL_CLOCK_ENABLE (1 << 0) +#define TEGRA_MMC_CLKCON_INTERNAL_CLOCK_STABLE (1 << 1) +#define TEGRA_MMC_CLKCON_SD_CLOCK_ENABLE (1 << 2) + +#define TEGRA_MMC_CLKCON_SDCLK_FREQ_SEL_SHIFT 8 +#define TEGRA_MMC_CLKCON_SDCLK_FREQ_SEL_MASK (0xff << 8) + +#define TEGRA_MMC_SWRST_SW_RESET_FOR_ALL (1 << 0) +#define TEGRA_MMC_SWRST_SW_RESET_FOR_CMD_LINE (1 << 1) +#define TEGRA_MMC_SWRST_SW_RESET_FOR_DAT_LINE (1 << 2) + +#define TEGRA_MMC_NORINTSTS_CMD_COMPLETE (1 << 0) +#define TEGRA_MMC_NORINTSTS_XFER_COMPLETE (1 << 1) +#define TEGRA_MMC_NORINTSTS_DMA_INTERRUPT (1 << 3) +#define TEGRA_MMC_NORINTSTS_ERR_INTERRUPT (1 << 15) +#define TEGRA_MMC_NORINTSTS_CMD_TIMEOUT (1 << 16) + +#define TEGRA_MMC_NORINTSTSEN_CMD_COMPLETE (1 << 0) +#define TEGRA_MMC_NORINTSTSEN_XFER_COMPLETE (1 << 1) +#define TEGRA_MMC_NORINTSTSEN_DMA_INTERRUPT (1 << 3) +#define TEGRA_MMC_NORINTSTSEN_BUFFER_WRITE_READY (1 << 4) +#define TEGRA_MMC_NORINTSTSEN_BUFFER_READ_READY (1 << 5) + +#define TEGRA_MMC_NORINTSIGEN_XFER_COMPLETE (1 << 1) + struct mmc_host { struct tegra2_mmc *reg; unsigned int version; /* SDHCI spec. version */ |