From 39320c537def08bafa07ef3dd0f519465e56d57d Mon Sep 17 00:00:00 2001 From: Jean-Jacques Hiblot Date: Tue, 2 Jul 2019 10:53:54 +0200 Subject: mmc: use the generic timeout for cmd6 (SWITCH) provided in the ext_csd Starting with rev 4.5, the eMMC can define a generic timeout for the SWITCH command. Following Linux Kernel code, the timeout also changed from 1000 -> 500 Signed-off-by: Jean-Jacques Hiblot --- drivers/mmc/mmc.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index a61e311ccaa..ff56c3dd67d 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -21,6 +21,8 @@ #include #include "mmc_private.h" +#define DEFAULT_CMD6_TIMEOUT_MS 500 + static int mmc_set_signal_voltage(struct mmc *mmc, uint signal_voltage); static int mmc_power_cycle(struct mmc *mmc); #if !CONFIG_IS_ENABLED(MMC_TINY) @@ -745,10 +747,13 @@ static int __mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value, bool send_status) { struct mmc_cmd cmd; - int timeout = 1000; + int timeout = DEFAULT_CMD6_TIMEOUT_MS; int retries = 3; int ret; + if (mmc->gen_cmd6_time) + timeout = mmc->gen_cmd6_time * 10; + cmd.cmdidx = MMC_CMD_SWITCH; cmd.resp_type = MMC_RSP_R1b; cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | @@ -2135,6 +2140,9 @@ static int mmc_startup_v4(struct mmc *mmc) mmc->capacity_user = capacity; } + if (mmc->version >= MMC_VERSION_4_5) + mmc->gen_cmd6_time = ext_csd[EXT_CSD_GENERIC_CMD6_TIME]; + /* The partition data may be non-zero but it is only * effective if PARTITION_SETTING_COMPLETED is set in * EXT_CSD, so ignore any data if this bit is not set, -- cgit v1.3.1