wandboard: Add card detection for SOM MicroSD card
This add support to identify if the card is connected or not; so it
does not try to communicate with the controller if no card is
available.
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
diff --git a/board/wandboard/wandboard.c b/board/wandboard/wandboard.c
index ac7b89a..8ec7eb9 100644
--- a/board/wandboard/wandboard.c
+++ b/board/wandboard/wandboard.c
@@ -38,6 +38,7 @@
PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED | \
PAD_CTL_DSE_40ohm | PAD_CTL_HYS)
+#define USDHC3_CD_GPIO IMX_GPIO_NR(3, 9)
#define ETH_PHY_RESET IMX_GPIO_NR(3, 29)
int dram_init(void)
@@ -59,6 +60,8 @@
MX6_PAD_SD3_DAT1__USDHC3_DAT1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
MX6_PAD_SD3_DAT2__USDHC3_DAT2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
MX6_PAD_SD3_DAT3__USDHC3_DAT3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ /* SOM MicroSD Card Detect */
+ MX6_PAD_EIM_DA9__GPIO_3_9 | MUX_PAD_CTRL(NO_PAD_CTRL),
};
static iomux_v3_cfg_t const enet_pads[] = {
@@ -100,12 +103,27 @@
{USDHC3_BASE_ADDR},
};
+int board_mmc_getcd(struct mmc *mmc)
+{
+ struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+ int ret = 0;
+
+ switch (cfg->esdhc_base) {
+ case USDHC3_BASE_ADDR:
+ ret = !gpio_get_value(USDHC3_CD_GPIO);
+ break;
+ }
+
+ return ret;
+}
+
int board_mmc_init(bd_t *bis)
{
imx_iomux_v3_setup_multiple_pads(usdhc3_pads, ARRAY_SIZE(usdhc3_pads));
usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
usdhc_cfg[0].max_bus_width = 4;
+ gpio_direction_input(USDHC3_CD_GPIO);
return fsl_esdhc_initialize(bis, &usdhc_cfg[0]);
}