diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig index a8a689f..006c901 100644 --- a/drivers/mmc/Kconfig +++ b/drivers/mmc/Kconfig @@ -42,6 +42,15 @@ config ARM_PL180_MMCI If you have an ARM(R) platform with a Multimedia Card slot, say Y or M here. +config MMC_QUIRKS + bool "Enable quirks" + default y + help + Some cards and hosts may sometimes behave unexpectedly (quirks). + This option enable workarounds to handle those quirks. Some of them + are enabled by default, other may require additionnal flags or are + enabled by the host driver. + config MMC_VERBOSE bool "Output more information about the MMC" default y diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 6278d1f..26589b8 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -279,6 +279,7 @@ int mmc_send_status(struct mmc *mmc, int timeout) int mmc_set_blocklen(struct mmc *mmc, int len) { struct mmc_cmd cmd; + int err; if (mmc->ddr_mode) return 0; @@ -287,7 +288,24 @@ int mmc_set_blocklen(struct mmc *mmc, int len) cmd.resp_type = MMC_RSP_R1; cmd.cmdarg = len; - return mmc_send_cmd(mmc, &cmd, NULL); + err = mmc_send_cmd(mmc, &cmd, NULL); + +#ifdef CONFIG_MMC_QUIRKS + if (err && (mmc->quirks & MMC_QUIRK_RETRY_SET_BLOCKLEN)) { + int retries = 4; + /* + * It has been seen that SET_BLOCKLEN may fail on the first + * attempt, let's try a few more time + */ + do { + err = mmc_send_cmd(mmc, &cmd, NULL); + if (!err) + break; + } while (retries--); + } +#endif + + return err; } static int mmc_read_blocks(struct mmc *mmc, void *dst, lbaint_t start, @@ -1881,7 +1899,6 @@ static int mmc_startup(struct mmc *mmc) cmd.resp_type = MMC_RSP_R1; cmd.cmdarg = 1; err = mmc_send_cmd(mmc, &cmd, NULL); - if (err) return err; } @@ -1895,6 +1912,21 @@ static int mmc_startup(struct mmc *mmc) err = mmc_send_cmd(mmc, &cmd, NULL); +#ifdef CONFIG_MMC_QUIRKS + if (err && (mmc->quirks & MMC_QUIRK_RETRY_SEND_CID)) { + int retries = 4; + /* + * It has been seen that SEND_CID may fail on the first + * attempt, let's try a few more time + */ + do { + err = mmc_send_cmd(mmc, &cmd, NULL); + if (!err) + break; + } while (retries--); + } +#endif + if (err) return err; @@ -2239,6 +2271,11 @@ int mmc_start_init(struct mmc *mmc) if (err) return err; +#ifdef CONFIG_MMC_QUIRKS + mmc->quirks = MMC_QUIRK_RETRY_SET_BLOCKLEN | + MMC_QUIRK_RETRY_SEND_CID; +#endif + err = mmc_power_cycle(mmc); if (err) { /* diff --git a/include/mmc.h b/include/mmc.h index a8901bf..a9ebc88 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -306,6 +306,9 @@ static inline bool mmc_is_tuning_cmd(uint cmdidx) #define ENHNCD_SUPPORT (0x2) #define PART_ENH_ATTRIB (0x1f) +#define MMC_QUIRK_RETRY_SEND_CID BIT(0) +#define MMC_QUIRK_RETRY_SET_BLOCKLEN BIT(1) + enum mmc_voltage { MMC_SIGNAL_VOLTAGE_000 = 0, MMC_SIGNAL_VOLTAGE_120, @@ -591,6 +594,7 @@ struct mmc { * operating mode due to limitations when * accessing the boot partitions */ + u32 quirks; }; struct mmc_hwpart_conf {