diff options
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci-omap.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c index 5433c9e6ac10..882053151a47 100644 --- a/drivers/mmc/host/sdhci-omap.c +++ b/drivers/mmc/host/sdhci-omap.c @@ -86,6 +86,7 @@ /* sdhci-omap controller flags */ #define SDHCI_OMAP_REQUIRE_IODELAY BIT(0) +#define SDHCI_OMAP_SPECIAL_RESET BIT(1) struct sdhci_omap_data { u32 offset; @@ -779,15 +780,35 @@ static void sdhci_omap_set_uhs_signaling(struct sdhci_host *host, sdhci_omap_start_clock(omap_host); } +#define MMC_TIMEOUT_US 20000 /* 20000 micro Sec */ static void sdhci_omap_reset(struct sdhci_host *host, u8 mask) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); + unsigned long limit = MMC_TIMEOUT_US; + unsigned long i = 0; /* Don't reset data lines during tuning operation */ if (omap_host->is_tuning) mask &= ~SDHCI_RESET_DATA; + if (omap_host->flags & SDHCI_OMAP_SPECIAL_RESET) { + sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET); + while ((!(sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask)) && + (i++ < limit)) + udelay(1); + i = 0; + while ((sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) && + (i++ < limit)) + udelay(1); + + if (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) + dev_err(mmc_dev(host->mmc), + "Timeout waiting on controller reset in %s\n", + __func__); + return; + } + sdhci_reset(host, mask); } @@ -900,10 +921,12 @@ static const struct sdhci_omap_data k2g_data = { static const struct sdhci_omap_data am335_data = { .offset = 0x200, + .flags = SDHCI_OMAP_SPECIAL_RESET, }; static const struct sdhci_omap_data am437_data = { .offset = 0x200, + .flags = SDHCI_OMAP_SPECIAL_RESET, }; static const struct sdhci_omap_data dra7_data = { |