diff options
Diffstat (limited to 'drivers/mmc/host/dw_mmc.c')
| -rw-r--r-- | drivers/mmc/host/dw_mmc.c | 68 |
1 files changed, 61 insertions, 7 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index d977f34f6b55..06dc56cbada8 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -335,7 +335,8 @@ static u32 dw_mci_prep_stop_abort(struct dw_mci *host, struct mmc_command *cmd) cmdr == MMC_WRITE_BLOCK || cmdr == MMC_WRITE_MULTIPLE_BLOCK || cmdr == MMC_SEND_TUNING_BLOCK || - cmdr == MMC_SEND_TUNING_BLOCK_HS200) { + cmdr == MMC_SEND_TUNING_BLOCK_HS200 || + cmdr == MMC_GEN_CMD) { stop->opcode = MMC_STOP_TRANSMISSION; stop->arg = 0; stop->flags = MMC_RSP_R1B | MMC_CMD_AC; @@ -1283,6 +1284,37 @@ static void dw_mci_setup_bus(struct dw_mci_slot *slot, bool force_clkinit) mci_writel(host, CTYPE, (slot->ctype << slot->id)); } +static void dw_mci_set_data_timeout(struct dw_mci *host, + unsigned int timeout_ns) +{ + const struct dw_mci_drv_data *drv_data = host->drv_data; + u32 clk_div, tmout; + u64 tmp; + + if (drv_data && drv_data->set_data_timeout) + return drv_data->set_data_timeout(host, timeout_ns); + + clk_div = (mci_readl(host, CLKDIV) & 0xFF) * 2; + if (clk_div == 0) + clk_div = 1; + + tmp = DIV_ROUND_UP_ULL((u64)timeout_ns * host->bus_hz, NSEC_PER_SEC); + tmp = DIV_ROUND_UP_ULL(tmp, clk_div); + + /* TMOUT[7:0] (RESPONSE_TIMEOUT) */ + tmout = 0xFF; /* Set maximum */ + + /* TMOUT[31:8] (DATA_TIMEOUT) */ + if (!tmp || tmp > 0xFFFFFF) + tmout |= (0xFFFFFF << 8); + else + tmout |= (tmp & 0xFFFFFF) << 8; + + mci_writel(host, TMOUT, tmout); + dev_dbg(host->dev, "timeout_ns: %u => TMOUT[31:8]: %#08x", + timeout_ns, tmout >> 8); +} + static void __dw_mci_start_request(struct dw_mci *host, struct dw_mci_slot *slot, struct mmc_command *cmd) @@ -1303,7 +1335,7 @@ static void __dw_mci_start_request(struct dw_mci *host, data = cmd->data; if (data) { - mci_writel(host, TMOUT, 0xFFFFFFFF); + dw_mci_set_data_timeout(host, data->timeout_ns); mci_writel(host, BYTCNT, data->blksz*data->blocks); mci_writel(host, BLKSIZ, data->blksz); } @@ -1967,12 +1999,16 @@ static int dw_mci_data_complete(struct dw_mci *host, struct mmc_data *data) static void dw_mci_set_drto(struct dw_mci *host) { + const struct dw_mci_drv_data *drv_data = host->drv_data; unsigned int drto_clks; unsigned int drto_div; unsigned int drto_ms; unsigned long irqflags; - drto_clks = mci_readl(host, TMOUT) >> 8; + if (drv_data && drv_data->get_drto_clks) + drto_clks = drv_data->get_drto_clks(host); + else + drto_clks = mci_readl(host, TMOUT) >> 8; drto_div = (mci_readl(host, CLKDIV) & 0xff) * 2; if (drto_div == 0) drto_div = 1; @@ -1980,6 +2016,8 @@ static void dw_mci_set_drto(struct dw_mci *host) drto_ms = DIV_ROUND_UP_ULL((u64)MSEC_PER_SEC * drto_clks * drto_div, host->bus_hz); + dev_dbg(host->dev, "drto_ms: %u\n", drto_ms); + /* add a bit spare time */ drto_ms += 10; @@ -2724,11 +2762,20 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) if (pending & DW_MCI_DATA_ERROR_FLAGS) { spin_lock(&host->irq_lock); + if (host->quirks & DW_MMC_QUIRK_EXTENDED_TMOUT) + del_timer(&host->dto_timer); + /* if there is an error report DATA_ERROR */ mci_writel(host, RINTSTS, DW_MCI_DATA_ERROR_FLAGS); host->data_status = pending; smp_wmb(); /* drain writebuffer */ set_bit(EVENT_DATA_ERROR, &host->pending_events); + + if (host->quirks & DW_MMC_QUIRK_EXTENDED_TMOUT) + /* In case of error, we cannot expect a DTO */ + set_bit(EVENT_DATA_COMPLETE, + &host->pending_events); + tasklet_schedule(&host->tasklet); spin_unlock(&host->irq_lock); @@ -2828,6 +2875,9 @@ static int dw_mci_init_slot_caps(struct dw_mci_slot *slot) if (host->pdata->pm_caps) mmc->pm_caps = host->pdata->pm_caps; + if (drv_data) + mmc->caps |= drv_data->common_caps; + if (host->dev->of_node) { ctrl_id = of_alias_get_id(host->dev->of_node, "mshc"); if (ctrl_id < 0) @@ -2848,7 +2898,12 @@ static int dw_mci_init_slot_caps(struct dw_mci_slot *slot) if (host->pdata->caps2) mmc->caps2 = host->pdata->caps2; - mmc->f_min = DW_MCI_FREQ_MIN; + /* if host has set a minimum_freq, we should respect it */ + if (host->minimum_speed) + mmc->f_min = host->minimum_speed; + else + mmc->f_min = DW_MCI_FREQ_MIN; + if (!mmc->f_max) mmc->f_max = DW_MCI_FREQ_MAX; @@ -3007,8 +3062,7 @@ static void dw_mci_init_dma(struct dw_mci *host) dev_info(host->dev, "Using internal DMA controller.\n"); } else { /* TRANS_MODE_EDMAC: check dma bindings again */ - if ((device_property_read_string_array(dev, "dma-names", - NULL, 0) < 0) || + if ((device_property_string_array_count(dev, "dma-names") < 0) || !device_property_present(dev, "dmas")) { goto no_dma; } @@ -3518,7 +3572,7 @@ int dw_mci_runtime_resume(struct device *dev) mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); - if (host->slot->mmc->pm_flags & MMC_PM_KEEP_POWER) + if (host->slot && host->slot->mmc->pm_flags & MMC_PM_KEEP_POWER) dw_mci_set_ios(host->slot->mmc, &host->slot->mmc->ios); /* Force setup bus to guarantee available clock output */ |