diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-14 15:15:53 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-14 15:15:53 (GMT) |
commit | a8e4def604a9affa04fdd4efa0692da1385ffa3f (patch) | |
tree | ab7c02cbfbd72cc4fe60674cd5da7e3d01035f00 /drivers/mmc/host/mmci.c | |
parent | d429a3639ca967ce2f35e3e8d4e70caec7149ded (diff) | |
parent | c83c8737e3edb33f60101d2d7692675d0cb6bdf1 (diff) | |
download | linux-a8e4def604a9affa04fdd4efa0692da1385ffa3f.tar.xz |
Merge tag 'mmc-v3.17-1' of git://git.linaro.org/people/ulf.hansson/mmc
Pull MMC updates from Ulf Hansson:
"Me and Chris Ball decided to try out using my MMC tree as the primary
one, to simplify handling of patches.
This pull does thus contains all the MMC patches for 3.17 rc1, no pull
from Chris this time.
Details:
MMC core:
- forward compatibility for eMMC
- fix some blacklisted cards with broken secure discard
MMC host:
- mmci: Add support for Qualcomm variant
- mmci: Fix regression for arm_variant
- sdhci: Various fixes and cleanups
- sdhci: Improve external VDD regulator support
- sdhci: Support for DDR50 1.8V mode for BayTrail
- sdhci-st: Add driver for ST SDHCI controller
- sh-mmcif: DMA fixes
- omap_hsmmc: Add support for SDIO interrupts
- sdhci-pci: Add support for Intel Quark X1000
- dw_mmc: Update the reset sequence
- s3cmci: port DMA code to dmaengine API"
* tag 'mmc-v3.17-1' of git://git.linaro.org/people/ulf.hansson/mmc: (67 commits)
mmc: dw_mmc: modify the dt-binding for removing slot-node and supports-highspeed
mmc: dw_mmc: Slot quirk "disable-wp" is deprecated.
mmc: mmci: Reverse IRQ handling for the arm_variant
mmc: mmci: Move all CMD irq handling to mmci_cmd_irq()
mmc: mmci: Remove redundant check of status for DATA irq
mmc: dw_mmc: change to use recommended reset procedure
mmc: sdhci-pxav3: Use devm_* managed helpers
mmc: tmio: Configure DMA slave bus width
mmc: sh_mmcif: Configure DMA slave bus width
mmc: sh_mmcif: Fix DMA slave address configuration
mmc: sh_mmcif: Document DT bindings
mmc: sdhci-pci: remove PCI PM functions in suspend/resume callback
mmc: Do not advertise secure discard if it is blacklisted
mmc: sdhci-msm: Get COMPILE_TEST support
mmc: sdhci-msm: Remove unnecessary header file inclusion
mmc: sdhci-msm: Fix the binding example
mmc: sdhci: add DDR50 1.8V mode support for BayTrail eMMC Controller
mmc: sdhci: Preset value not supported in Baytrail eMMC
mmc: MMC_USDHI6ROL0 should depend on HAS_DMA
mmc: MMC_SH_MMCIF should depend on HAS_DMA
...
Diffstat (limited to 'drivers/mmc/host/mmci.c')
-rw-r--r-- | drivers/mmc/host/mmci.c | 168 |
1 files changed, 140 insertions, 28 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 7ad463e..e4d4707 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -52,34 +52,53 @@ static unsigned int fmax = 515633; * struct variant_data - MMCI variant-specific quirks * @clkreg: default value for MCICLOCK register * @clkreg_enable: enable value for MMCICLOCK register + * @clkreg_8bit_bus_enable: enable value for 8 bit bus + * @clkreg_neg_edge_enable: enable value for inverted data/cmd output * @datalength_bits: number of bits in the MMCIDATALENGTH register * @fifosize: number of bytes that can be written when MMCI_TXFIFOEMPTY * is asserted (likewise for RX) * @fifohalfsize: number of bytes that can be written when MCI_TXFIFOHALFEMPTY * is asserted (likewise for RX) + * @data_cmd_enable: enable value for data commands. * @sdio: variant supports SDIO * @st_clkdiv: true if using a ST-specific clock divider algorithm + * @datactrl_mask_ddrmode: ddr mode mask in datactrl register. * @blksz_datactrl16: true if Block size is at b16..b30 position in datactrl register + * @blksz_datactrl4: true if Block size is at b4..b16 position in datactrl + * register * @pwrreg_powerup: power up value for MMCIPOWER register + * @f_max: maximum clk frequency supported by the controller. * @signal_direction: input/out direction of bus signals can be indicated * @pwrreg_clkgate: MMCIPOWER register must be used to gate the clock * @busy_detect: true if busy detection on dat0 is supported * @pwrreg_nopower: bits in MMCIPOWER don't controls ext. power supply + * @explicit_mclk_control: enable explicit mclk control in driver. + * @qcom_fifo: enables qcom specific fifo pio read logic. + * @reversed_irq_handling: handle data irq before cmd irq. */ struct variant_data { unsigned int clkreg; unsigned int clkreg_enable; + unsigned int clkreg_8bit_bus_enable; + unsigned int clkreg_neg_edge_enable; unsigned int datalength_bits; unsigned int fifosize; unsigned int fifohalfsize; + unsigned int data_cmd_enable; + unsigned int datactrl_mask_ddrmode; bool sdio; bool st_clkdiv; bool blksz_datactrl16; + bool blksz_datactrl4; u32 pwrreg_powerup; + u32 f_max; bool signal_direction; bool pwrreg_clkgate; bool busy_detect; bool pwrreg_nopower; + bool explicit_mclk_control; + bool qcom_fifo; + bool reversed_irq_handling; }; static struct variant_data variant_arm = { @@ -87,6 +106,8 @@ static struct variant_data variant_arm = { .fifohalfsize = 8 * 4, .datalength_bits = 16, .pwrreg_powerup = MCI_PWR_UP, + .f_max = 100000000, + .reversed_irq_handling = true, }; static struct variant_data variant_arm_extended_fifo = { @@ -94,6 +115,7 @@ static struct variant_data variant_arm_extended_fifo = { .fifohalfsize = 64 * 4, .datalength_bits = 16, .pwrreg_powerup = MCI_PWR_UP, + .f_max = 100000000, }; static struct variant_data variant_arm_extended_fifo_hwfc = { @@ -102,15 +124,18 @@ static struct variant_data variant_arm_extended_fifo_hwfc = { .clkreg_enable = MCI_ARM_HWFCEN, .datalength_bits = 16, .pwrreg_powerup = MCI_PWR_UP, + .f_max = 100000000, }; static struct variant_data variant_u300 = { .fifosize = 16 * 4, .fifohalfsize = 8 * 4, .clkreg_enable = MCI_ST_U300_HWFCEN, + .clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS, .datalength_bits = 16, .sdio = true, .pwrreg_powerup = MCI_PWR_ON, + .f_max = 100000000, .signal_direction = true, .pwrreg_clkgate = true, .pwrreg_nopower = true, @@ -124,6 +149,7 @@ static struct variant_data variant_nomadik = { .sdio = true, .st_clkdiv = true, .pwrreg_powerup = MCI_PWR_ON, + .f_max = 100000000, .signal_direction = true, .pwrreg_clkgate = true, .pwrreg_nopower = true, @@ -134,10 +160,13 @@ static struct variant_data variant_ux500 = { .fifohalfsize = 8 * 4, .clkreg = MCI_CLK_ENABLE, .clkreg_enable = MCI_ST_UX500_HWFCEN, + .clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS, + .clkreg_neg_edge_enable = MCI_ST_UX500_NEG_EDGE, .datalength_bits = 24, .sdio = true, .st_clkdiv = true, .pwrreg_powerup = MCI_PWR_ON, + .f_max = 100000000, .signal_direction = true, .pwrreg_clkgate = true, .busy_detect = true, @@ -149,17 +178,38 @@ static struct variant_data variant_ux500v2 = { .fifohalfsize = 8 * 4, .clkreg = MCI_CLK_ENABLE, .clkreg_enable = MCI_ST_UX500_HWFCEN, + .clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS, + .clkreg_neg_edge_enable = MCI_ST_UX500_NEG_EDGE, + .datactrl_mask_ddrmode = MCI_ST_DPSM_DDRMODE, .datalength_bits = 24, .sdio = true, .st_clkdiv = true, .blksz_datactrl16 = true, .pwrreg_powerup = MCI_PWR_ON, + .f_max = 100000000, .signal_direction = true, .pwrreg_clkgate = true, .busy_detect = true, .pwrreg_nopower = true, }; +static struct variant_data variant_qcom = { + .fifosize = 16 * 4, + .fifohalfsize = 8 * 4, + .clkreg = MCI_CLK_ENABLE, + .clkreg_enable = MCI_QCOM_CLK_FLOWENA | + MCI_QCOM_CLK_SELECT_IN_FBCLK, + .clkreg_8bit_bus_enable = MCI_QCOM_CLK_WIDEBUS_8, + .datactrl_mask_ddrmode = MCI_QCOM_CLK_SELECT_IN_DDR_MODE, + .data_cmd_enable = MCI_QCOM_CSPM_DATCMD, + .blksz_datactrl4 = true, + .datalength_bits = 24, + .pwrreg_powerup = MCI_PWR_UP, + .f_max = 208000000, + .explicit_mclk_control = true, + .qcom_fifo = true, +}; + static int mmci_card_busy(struct mmc_host *mmc) { struct mmci_host *host = mmc_priv(mmc); @@ -260,7 +310,9 @@ static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired) host->cclk = 0; if (desired) { - if (desired >= host->mclk) { + if (variant->explicit_mclk_control) { + host->cclk = host->mclk; + } else if (desired >= host->mclk) { clk = MCI_CLK_BYPASS; if (variant->st_clkdiv) clk |= MCI_ST_UX500_NEG_EDGE; @@ -299,11 +351,11 @@ static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired) if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4) clk |= MCI_4BIT_BUS; if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_8) - clk |= MCI_ST_8BIT_BUS; + clk |= variant->clkreg_8bit_bus_enable; if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50 || host->mmc->ios.timing == MMC_TIMING_MMC_DDR52) - clk |= MCI_ST_UX500_NEG_EDGE; + clk |= variant->clkreg_neg_edge_enable; mmci_write_clkreg(host, clk); } @@ -719,7 +771,7 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data) data->bytes_xfered = 0; clks = (unsigned long long)data->timeout_ns * host->cclk; - do_div(clks, 1000000000UL); + do_div(clks, NSEC_PER_SEC); timeout = data->timeout_clks + (unsigned int)clks; @@ -732,6 +784,8 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data) if (variant->blksz_datactrl16) datactrl = MCI_DPSM_ENABLE | (data->blksz << 16); + else if (variant->blksz_datactrl4) + datactrl = MCI_DPSM_ENABLE | (data->blksz << 4); else datactrl = MCI_DPSM_ENABLE | blksz_bits << 4; @@ -767,7 +821,7 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data) if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50 || host->mmc->ios.timing == MMC_TIMING_MMC_DDR52) - datactrl |= MCI_ST_DPSM_DDRMODE; + datactrl |= variant->datactrl_mask_ddrmode; /* * Attempt to use DMA operation mode, if this @@ -812,7 +866,7 @@ mmci_start_command(struct mmci_host *host, struct mmc_command *cmd, u32 c) if (readl(base + MMCICOMMAND) & MCI_CPSM_ENABLE) { writel(0, base + MMCICOMMAND); - udelay(1); + mmci_reg_delay(host); } c |= cmd->opcode | MCI_CPSM_ENABLE; @@ -824,6 +878,9 @@ mmci_start_command(struct mmci_host *host, struct mmc_command *cmd, u32 c) if (/*interrupt*/0) c |= MCI_CPSM_INTERRUPT; + if (mmc_cmd_type(cmd) == MMC_CMD_ADTC) + c |= host->variant->data_cmd_enable; + host->cmd = cmd; writel(cmd->arg, base + MMCIARGUMENT); @@ -834,6 +891,10 @@ static void mmci_data_irq(struct mmci_host *host, struct mmc_data *data, unsigned int status) { + /* Make sure we have data to handle */ + if (!data) + return; + /* First check for errors */ if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_STARTBITERR| MCI_TXUNDERRUN|MCI_RXOVERRUN)) { @@ -902,9 +963,17 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd, unsigned int status) { void __iomem *base = host->base; - bool sbc = (cmd == host->mrq->sbc); - bool busy_resp = host->variant->busy_detect && - (cmd->flags & MMC_RSP_BUSY); + bool sbc, busy_resp; + + if (!cmd) + return; + + sbc = (cmd == host->mrq->sbc); + busy_resp = host->variant->busy_detect && (cmd->flags & MMC_RSP_BUSY); + + if (!((status|host->busy_status) & (MCI_CMDCRCFAIL|MCI_CMDTIMEOUT| + MCI_CMDSENT|MCI_CMDRESPEND))) + return; /* Check if we need to wait for busy completion. */ if (host->busy_status && (status & MCI_ST_CARDBUSY)) @@ -957,15 +1026,34 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd, } } +static int mmci_get_rx_fifocnt(struct mmci_host *host, u32 status, int remain) +{ + return remain - (readl(host->base + MMCIFIFOCNT) << 2); +} + +static int mmci_qcom_get_rx_fifocnt(struct mmci_host *host, u32 status, int r) +{ + /* + * on qcom SDCC4 only 8 words are used in each burst so only 8 addresses + * from the fifo range should be used + */ + if (status & MCI_RXFIFOHALFFULL) + return host->variant->fifohalfsize; + else if (status & MCI_RXDATAAVLBL) + return 4; + + return 0; +} + static int mmci_pio_read(struct mmci_host *host, char *buffer, unsigned int remain) { void __iomem *base = host->base; char *ptr = buffer; - u32 status; + u32 status = readl(host->base + MMCISTATUS); int host_remain = host->size; do { - int count = host_remain - (readl(base + MMCIFIFOCNT) << 2); + int count = host->get_rx_fifocnt(host, status, host_remain); if (count > remain) count = remain; @@ -1132,9 +1220,6 @@ static irqreturn_t mmci_irq(int irq, void *dev_id) spin_lock(&host->lock); do { - struct mmc_command *cmd; - struct mmc_data *data; - status = readl(host->base + MMCISTATUS); if (host->singleirq) { @@ -1154,16 +1239,13 @@ static irqreturn_t mmci_irq(int irq, void *dev_id) dev_dbg(mmc_dev(host->mmc), "irq0 (data+cmd) %08x\n", status); - cmd = host->cmd; - if ((status|host->busy_status) & (MCI_CMDCRCFAIL|MCI_CMDTIMEOUT| - MCI_CMDSENT|MCI_CMDRESPEND) && cmd) - mmci_cmd_irq(host, cmd, status); - - data = host->data; - if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_STARTBITERR| - MCI_TXUNDERRUN|MCI_RXOVERRUN|MCI_DATAEND| - MCI_DATABLOCKEND) && data) - mmci_data_irq(host, data, status); + if (host->variant->reversed_irq_handling) { + mmci_data_irq(host, host->data, status); + mmci_cmd_irq(host, host->cmd, status); + } else { + mmci_cmd_irq(host, host->cmd, status); + mmci_data_irq(host, host->data, status); + } /* Don't poll for busy completion in irq context. */ if (host->busy_status) @@ -1296,6 +1378,17 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) if (!ios->clock && variant->pwrreg_clkgate) pwr &= ~MCI_PWR_ON; + if (host->variant->explicit_mclk_control && + ios->clock != host->clock_cache) { + ret = clk_set_rate(host->clk, ios->clock); + if (ret < 0) + dev_err(mmc_dev(host->mmc), + "Error setting clock rate (%d)\n", ret); + else + host->mclk = clk_get_rate(host->clk); + } + host->clock_cache = ios->clock; + spin_lock_irqsave(&host->lock, flags); mmci_set_clkreg(host, ios->clock); @@ -1443,6 +1536,11 @@ static int mmci_probe(struct amba_device *dev, if (ret) goto host_free; + if (variant->qcom_fifo) + host->get_rx_fifocnt = mmci_qcom_get_rx_fifocnt; + else + host->get_rx_fifocnt = mmci_get_rx_fifocnt; + host->plat = plat; host->variant = variant; host->mclk = clk_get_rate(host->clk); @@ -1451,8 +1549,8 @@ static int mmci_probe(struct amba_device *dev, * so we try to adjust the clock down to this, * (if possible). */ - if (host->mclk > 100000000) { - ret = clk_set_rate(host->clk, 100000000); + if (host->mclk > variant->f_max) { + ret = clk_set_rate(host->clk, variant->f_max); if (ret < 0) goto clk_disable; host->mclk = clk_get_rate(host->clk); @@ -1471,9 +1569,12 @@ static int mmci_probe(struct amba_device *dev, * The ARM and ST versions of the block have slightly different * clock divider equations which means that the minimum divider * differs too. + * on Qualcomm like controllers get the nearest minimum clock to 100Khz */ if (variant->st_clkdiv) mmc->f_min = DIV_ROUND_UP(host->mclk, 257); + else if (variant->explicit_mclk_control) + mmc->f_min = clk_round_rate(host->clk, 100000); else mmc->f_min = DIV_ROUND_UP(host->mclk, 512); /* @@ -1483,9 +1584,14 @@ static int mmci_probe(struct amba_device *dev, * the block, of course. */ if (mmc->f_max) - mmc->f_max = min(host->mclk, mmc->f_max); + mmc->f_max = variant->explicit_mclk_control ? + min(variant->f_max, mmc->f_max) : + min(host->mclk, mmc->f_max); else - mmc->f_max = min(host->mclk, fmax); + mmc->f_max = variant->explicit_mclk_control ? + fmax : min(host->mclk, fmax); + + dev_dbg(mmc_dev(mmc), "clocking block at %u Hz\n", mmc->f_max); /* Get regulators and the supported OCR mask */ @@ -1752,6 +1858,12 @@ static struct amba_id mmci_ids[] = { .mask = 0xf0ffffff, .data = &variant_ux500v2, }, + /* Qualcomm variants */ + { + .id = 0x00051180, + .mask = 0x000fffff, + .data = &variant_qcom, + }, { 0, 0 }, }; |