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mxs: mmc: Allow overriding default card detect implementation 

Some MXS based boards do not implement the card-detect signal. Allow
user to specify alternate card-detect implementation.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Marek Vasut 2013-01-22 15:01:03 +00:00 committed by Stefano Babic
parent 8000d8a826
commit 90bc2bf297
6 changed files with 19 additions and 7 deletions
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2
arch/arm/include/asm/arch-mxs/sys_proto.h
View File

@ -31,7 +31,7 @@ int mxs_wait_mask_clr(struct mxs_register_32 *reg,
uint32_t mask,
unsigned int timeout);
int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int));
int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int), int (*cd)(int));
#ifdef CONFIG_SPL_BUILD

2
board/bluegiga/apx4devkit/apx4devkit.c
View File

@ -69,7 +69,7 @@ int board_init(void)
#ifdef CONFIG_CMD_MMC
int board_mmc_init(bd_t *bis)
{
return mxsmmc_initialize(bis, 0, NULL);
return mxsmmc_initialize(bis, 0, NULL, NULL);
}
#endif

2
board/denx/m28evk/m28evk.c
View File

@ -93,7 +93,7 @@ int board_mmc_init(bd_t *bis)
/* Turn on the power to the card. */
gpio_direction_output(MX28_PAD_PWM3__GPIO_3_28, 0);
return mxsmmc_initialize(bis, 0, m28_mmc_wp);
return mxsmmc_initialize(bis, 0, m28_mmc_wp, NULL);
}
#endif

2
board/freescale/mx28evk/mx28evk.c
View File

@ -94,7 +94,7 @@ int board_mmc_init(bd_t *bis)
/* Configure MMC0 Power Enable */
gpio_direction_output(MX28_PAD_PWM3__GPIO_3_28, 0);
return mxsmmc_initialize(bis, 0, mx28evk_mmc_wp);
return mxsmmc_initialize(bis, 0, mx28evk_mmc_wp, NULL);
}
#endif

2
board/schulercontrol/sc_sps_1/sc_sps_1.c
View File

@ -78,7 +78,7 @@ int dram_init(void)
#ifdef CONFIG_CMD_MMC
int board_mmc_init(bd_t *bis)
{
return mxsmmc_initialize(bis, 0, NULL);
return mxsmmc_initialize(bis, 0, NULL, NULL);
}
#endif

16
drivers/mmc/mxsmmc.c
View File

@ -49,12 +49,23 @@ struct mxsmmc_priv {
struct mxs_ssp_regs *regs;
uint32_t buswidth;
int (*mmc_is_wp)(int);
int (*mmc_cd)(int);
struct mxs_dma_desc *desc;
};
#define MXSMMC_MAX_TIMEOUT 10000
#define MXSMMC_SMALL_TRANSFER 512
static int mxsmmc_cd(struct mxsmmc_priv *priv)
{
struct mxs_ssp_regs *ssp_regs = priv->regs;
if (priv->mmc_cd)
return priv->mmc_cd(priv->id);
return !(readl(&ssp_regs->hw_ssp_status) & SSP_STATUS_CARD_DETECT);
}
static int mxsmmc_send_cmd_pio(struct mxsmmc_priv *priv, struct mmc_data *data)
{
struct mxs_ssp_regs *ssp_regs = priv->regs;
@ -166,7 +177,7 @@ mxsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
}
/* See if card is present */
if (readl(&ssp_regs->hw_ssp_status) & SSP_STATUS_CARD_DETECT) {
if (!mxsmmc_cd(priv)) {
printf("MMC%d: No card detected!\n", mmc->block_dev.dev);
return NO_CARD_ERR;
}
@ -357,7 +368,7 @@ static int mxsmmc_init(struct mmc *mmc)
return 0;
}
int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int))
int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int), int (*cd)(int))
{
struct mmc *mmc = NULL;
struct mxsmmc_priv *priv = NULL;
@ -395,6 +406,7 @@ int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int))
return ret;
priv->mmc_is_wp = wp;
priv->mmc_cd = cd;
priv->id = id;
priv->regs = mxs_ssp_regs_by_bus(id);