diff options
| -rw-r--r-- | drivers/mmc/host/tmio_mmc_pio.c | 56 |
1 files changed, 46 insertions, 10 deletions
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c index e5b3fcf55c4..f508ecb5b8a 100644 --- a/drivers/mmc/host/tmio_mmc_pio.c +++ b/drivers/mmc/host/tmio_mmc_pio.c @@ -43,6 +43,7 @@ #include <linux/platform_device.h> #include <linux/pm_qos.h> #include <linux/pm_runtime.h> +#include <linux/regulator/consumer.h> #include <linux/scatterlist.h> #include <linux/spinlock.h> #include <linux/workqueue.h> @@ -155,6 +156,7 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host, int new_clock) host->set_clk_div(host->pdev, (clk>>22) & 1); sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & 0x1ff); + msleep(10); } static void tmio_mmc_clk_stop(struct tmio_mmc_host *host) @@ -768,16 +770,48 @@ static int tmio_mmc_clk_update(struct mmc_host *mmc) return ret; } -static void tmio_mmc_set_power(struct tmio_mmc_host *host, struct mmc_ios *ios) +static void tmio_mmc_power_on(struct tmio_mmc_host *host, unsigned short vdd) { struct mmc_host *mmc = host->mmc; + int ret = 0; + + /* .set_ios() is returning void, so, no chance to report an error */ if (host->set_pwr) - host->set_pwr(host->pdev, ios->power_mode != MMC_POWER_OFF); + host->set_pwr(host->pdev, 1); + + if (!IS_ERR(mmc->supply.vmmc)) { + ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); + /* + * Attention: empiric value. With a b43 WiFi SDIO card this + * delay proved necessary for reliable card-insertion probing. + * 100us were not enough. Is this the same 140us delay, as in + * tmio_mmc_set_ios()? + */ + udelay(200); + } + /* + * It seems, VccQ should be switched on after Vcc, this is also what the + * omap_hsmmc.c driver does. + */ + if (!IS_ERR(mmc->supply.vqmmc) && !ret) { + regulator_enable(mmc->supply.vqmmc); + udelay(200); + } +} + +static void tmio_mmc_power_off(struct tmio_mmc_host *host) +{ + struct mmc_host *mmc = host->mmc; + + if (!IS_ERR(mmc->supply.vqmmc)) + regulator_disable(mmc->supply.vqmmc); + if (!IS_ERR(mmc->supply.vmmc)) - /* Errors ignored... */ - mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, - ios->power_mode ? ios->vdd : 0); + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); + + if (host->set_pwr) + host->set_pwr(host->pdev, 0); } /* Set MMC clock / power. @@ -828,18 +862,20 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) if (!host->power) { tmio_mmc_clk_update(mmc); pm_runtime_get_sync(dev); - host->power = true; } tmio_mmc_set_clock(host, ios->clock); - /* power up SD bus */ - tmio_mmc_set_power(host, ios); + if (!host->power) { + /* power up SD card and the bus */ + tmio_mmc_power_on(host, ios->vdd); + host->power = true; + } /* start bus clock */ tmio_mmc_clk_start(host); } else if (ios->power_mode != MMC_POWER_UP) { - if (ios->power_mode == MMC_POWER_OFF) - tmio_mmc_set_power(host, ios); if (host->power) { struct tmio_mmc_data *pdata = host->pdata; + if (ios->power_mode == MMC_POWER_OFF) + tmio_mmc_power_off(host); tmio_mmc_clk_stop(host); host->power = false; pm_runtime_put(dev); |