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drivers: mmc: use pre-configure set by pre-loader or bootrom 

The MMC is initialized by pre-loader or bootrom, so it is no need to
initialize it again. Open this config to skip some unused initialized
process.

Signed-off-by: Jason Zhu <jason.zhu@rock-chips.com>
Change-Id: If00fc3ce7df4d15e71ecfd8f8717a59640c3b7a9
This commit is contained in:
Jason Zhu 2020-04-02 21:45:55 +08:00
parent 68a90c3146
commit 479fbf72ee
2 changed files with 60 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/mmc/Kconfig
View File

@ -386,6 +386,13 @@ config GENERIC_ATMEL_MCI
the SD Memory Card Specification V2.0, the SDIO V2.0 specification
and CE-ATA V1.1.
config MMC_USE_PRE_CONFIG
bool "Enable to use pre-configure set by pre-loader or bootrom"
help
The MMC is initialized by pre-loader or bootrom, so it is no need to
initialize it again. Open this config to skip some unused initialized
process.
endif
config TEGRA124_MMC_DISABLE_EXT_LOOPBACK

56
drivers/mmc/mmc.c
View File

@ -386,6 +386,7 @@ static int mmc_go_idle(struct mmc *mmc)
return 0;
}
#ifndef CONFIG_MMC_USE_PRE_CONFIG
static int sd_send_op_cond(struct mmc *mmc)
{
int timeout = 1000;
@ -453,6 +454,7 @@ static int sd_send_op_cond(struct mmc *mmc)
return 0;
}
#endif
static int mmc_send_op_cond_iter(struct mmc *mmc, int use_arg)
{
@ -475,6 +477,7 @@ static int mmc_send_op_cond_iter(struct mmc *mmc, int use_arg)
return 0;
}
#ifndef CONFIG_MMC_USE_PRE_CONFIG
static int mmc_send_op_cond(struct mmc *mmc)
{
int err, i;
@ -495,7 +498,7 @@ static int mmc_send_op_cond(struct mmc *mmc)
mmc->op_cond_pending = 1;
return 0;
}
#endif
static int mmc_complete_op_cond(struct mmc *mmc)
{
struct mmc_cmd cmd;
@ -1553,7 +1556,7 @@ static int mmc_startup(struct mmc *mmc)
return err;
}
#endif
#ifndef CONFIG_MMC_USE_PRE_CONFIG
/* Put the Card in Identify Mode */
cmd.cmdidx = mmc_host_is_spi(mmc) ? MMC_CMD_SEND_CID :
MMC_CMD_ALL_SEND_CID; /* cmd not supported in spi */
@ -1585,7 +1588,7 @@ static int mmc_startup(struct mmc *mmc)
if (IS_SD(mmc))
mmc->rca = (cmd.response[0] >> 16) & 0xffff;
}
#endif
/* Get the Card-Specific Data */
cmd.cmdidx = MMC_CMD_SEND_CSD;
cmd.resp_type = MMC_RSP_R2;
@ -1924,6 +1927,7 @@ static int mmc_startup(struct mmc *mmc)
return 0;
}
#ifndef CONFIG_MMC_USE_PRE_CONFIG
static int mmc_send_if_cond(struct mmc *mmc)
{
struct mmc_cmd cmd;
@ -1946,6 +1950,7 @@ static int mmc_send_if_cond(struct mmc *mmc)
return 0;
}
#endif
#if !CONFIG_IS_ENABLED(DM_MMC)
/* board-specific MMC power initializations. */
@ -1954,6 +1959,7 @@ __weak void board_mmc_power_init(void)
}
#endif
#ifndef CONFIG_MMC_USE_PRE_CONFIG
static int mmc_power_init(struct mmc *mmc)
{
#if CONFIG_IS_ENABLED(DM_MMC)
@ -1983,7 +1989,50 @@ static int mmc_power_init(struct mmc *mmc)
#endif
return 0;
}
#endif
#ifdef CONFIG_MMC_USE_PRE_CONFIG
static int mmc_select_card(struct mmc *mmc, int n)
{
struct mmc_cmd cmd;
int err = 0;
memset(&cmd, 0, sizeof(struct mmc_cmd));
if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
mmc->rca = n;
cmd.cmdidx = MMC_CMD_SELECT_CARD;
cmd.resp_type = MMC_RSP_R1;
cmd.cmdarg = mmc->rca << 16;
err = mmc_send_cmd(mmc, &cmd, NULL);
}
return err;
}
int mmc_start_init(struct mmc *mmc)
{
/*
* We use the MMC config set by the bootrom.
* So it is no need to reset the eMMC device.
*/
mmc_set_bus_width(mmc, 8);
mmc_set_clock(mmc, 1);
mmc_set_timing(mmc, MMC_TIMING_LEGACY);
/* Send cmd7 to return stand-by state*/
mmc_select_card(mmc, 0);
mmc->version = MMC_VERSION_UNKNOWN;
mmc->high_capacity = 1;
/*
* The RCA is set to 2 by rockchip bootrom, use the default
* value here.
*/
#ifdef CONFIG_ARCH_ROCKCHIP
mmc->rca = 2;
#else
mmc->rca = 1;
#endif
return 0;
}
#else
int mmc_start_init(struct mmc *mmc)
{
bool no_card;
@ -2056,6 +2105,7 @@ int mmc_start_init(struct mmc *mmc)
return err;
}
#endif
static int mmc_complete_init(struct mmc *mmc)
{