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mmc: host: rk_sdmmc:

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Support poll-hw-reset for emmc devices with vccq always on,
that may fail boot since devices cannot enter pre-idle in this case.
No sense send CMD12 and wait DTO when booting recommended by dw-spec.
Default no attribute poll-hw-reset in dts.
This commit is contained in:
lin tao
2014-06-17 08:44:28 +08:00
parent e9fa201a63
commit 2098730fcd
1 changed files with 4 additions and 2 deletions
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6
drivers/mmc/host/rk_sdmmc.c
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@@ -1369,6 +1369,7 @@ static void dw_mci_hw_reset(struct mmc_host *mmc)
unsigned long timeout;
bool ret = true;
#if 0
/* (1) CMD12 to end any transfer in process */
cmd_flags = SDMMC_CMD_STOP | SDMMC_CMD_RESP_CRC
| SDMMC_CMD_RESP_EXP | MMC_STOP_TRANSMISSION;
@@ -1390,7 +1391,7 @@ static void dw_mci_hw_reset(struct mmc_host *mmc)
MMC_DBG_ERR_FUNC(host->mmc,
"%s dw_mci_hw_reset: STOP_TRANSMISSION failed!!! [%s]\n",
__func__, mmc_hostname(host->mmc));
/* (2) wait DTO, even if no response is sent back by card */
ret = true;
timeout = jiffies + msecs_to_jiffies(5);
@@ -1401,8 +1402,9 @@ static void dw_mci_hw_reset(struct mmc_host *mmc)
break;
}
}
#endif
/* (3) Reset following: DONNOT CHANGE RESET ORDER!*/
/* (3) Reset following: DONNOT CHANGE RESET ORDER!*/
/* Software reset - BMOD[0] for IDMA only */
regs = mci_readl(host, BMOD);