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>

diff --git a/arch/arm/include/asm/arch-mxs/sys_proto.h b/arch/arm/include/asm/arch-mxs/sys_proto.h
index 8aaf196dfc8a80a1f01ce223be93d0e6ac4218a1..5bafde5673dd4917bf081dd5d7aebb8a3941c7cf 100644 (file)
--- a/arch/arm/include/asm/arch-mxs/sys_proto.h
+++ b/arch/arm/include/asm/arch-mxs/sys_proto.h
@@ -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
 

diff --git a/board/bluegiga/apx4devkit/apx4devkit.c b/board/bluegiga/apx4devkit/apx4devkit.c
index 029b9731a1809e89d6e20e74975b64a4c471c7f9..5927693e0d009b1885bc088d6b3df5fa5454774b 100644 (file)
--- a/board/bluegiga/apx4devkit/apx4devkit.c
+++ b/board/bluegiga/apx4devkit/apx4devkit.c
@@ -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
 

diff --git a/board/denx/m28evk/m28evk.c b/board/denx/m28evk/m28evk.c
index 26f31d62b21f7b80ef77ec6aa4bc343a46b9415d..d93efafad0acdd18c58d93c98e1903d81d61b186 100644 (file)
--- a/board/denx/m28evk/m28evk.c
+++ b/board/denx/m28evk/m28evk.c
@@ -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
 

diff --git a/board/freescale/mx28evk/mx28evk.c b/board/freescale/mx28evk/mx28evk.c
index ad66f293c8aa89ea486a25f94ad8ce0fd80e4a3b..de7231bd10bde92e982aa4e81f79c59994f74ce4 100644 (file)
--- a/board/freescale/mx28evk/mx28evk.c
+++ b/board/freescale/mx28evk/mx28evk.c
@@ -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
 

diff --git a/board/schulercontrol/sc_sps_1/sc_sps_1.c b/board/schulercontrol/sc_sps_1/sc_sps_1.c
index fac7e30e26cadde3fce6771d3d485de342d12e97..81382379c4930bb0610c10d9c50a1d514951d1c2 100644 (file)
--- a/board/schulercontrol/sc_sps_1/sc_sps_1.c
+++ b/board/schulercontrol/sc_sps_1/sc_sps_1.c
@@ -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
 

diff --git a/drivers/mmc/mxsmmc.c b/drivers/mmc/mxsmmc.c
index 9d71202ef34bac3f203af0a33564cef37b2a6245..023dbd5bc24079ca8a0c772d0d502d08084aafb4 100644 (file)
--- a/drivers/mmc/mxsmmc.c
+++ b/drivers/mmc/mxsmmc.c
@@ -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);