[U-Boot] [PATCH 2/3] ot1200: add support for usdhc4

Christian Gmeiner
2014-10-23T11:46:42Z

On the 'mr' variant switching to 'mmc dev 1' will result
in "MMC: no card present".

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
---
board/bachmann/ot1200/ot1200.c | 54 ++++++++++++++++++++++++++++++++++++++----
1 file changed, 49 insertions(+), 5 deletions(-)

diff --git a/board/bachmann/ot1200/ot1200.c b/board/bachmann/ot1200/ot1200.c
index a2fb3cf..45d761f 100644
--- a/board/bachmann/ot1200/ot1200.c
+++ b/board/bachmann/ot1200/ot1200.c
@@ -141,23 +141,67 @@ static iomux_v3_cfg_t const usdhc3_pads[] = {
MX6_PAD_SD3_RST__SD3_RESET | MUX_PAD_CTRL(USDHC_PAD_CTRL),
};

+iomux_v3_cfg_t const usdhc4_pads[] = {
+ MX6_PAD_SD4_CLK__SD4_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD4_CMD__SD4_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD4_DAT0__SD4_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD4_DAT1__SD4_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD4_DAT2__SD4_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD4_DAT3__SD4_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+};
+
int board_mmc_getcd(struct mmc *mmc)
{
- return 1;
+ struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+ int ret;
+
+ if (cfg->esdhc_base == USDHC3_BASE_ADDR)
+ ret = 1;
+ else {
+ gpio_direction_input(IMX_GPIO_NR(1, 4));
+ ret = !gpio_get_value(IMX_GPIO_NR(1, 4));
+ }
+
+ return ret;
}

-struct fsl_esdhc_cfg usdhc_cfg[] = {
+struct fsl_esdhc_cfg usdhc_cfg[2] = {
{USDHC3_BASE_ADDR},
+ {USDHC4_BASE_ADDR},
};

int board_mmc_init(bd_t *bis)
{
+ s32 status = 0;
+ u32 index = 0;
+
usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
- usdhc_cfg[0].max_bus_width = 8;
+ usdhc_cfg[1].sdhc_clk = mxc_get_clock(MXC_ESDHC4_CLK);

- imx_iomux_v3_setup_multiple_pads(usdhc3_pads, ARRAY_SIZE(usdhc3_pads));
+ usdhc_cfg[0].max_bus_width = 8;
+ usdhc_cfg[1].max_bus_width = 4;
+
+ for (index = 0; index < CONFIG_SYS_FSL_USDHC_NUM; ++index) {
+ switch (index) {
+ case 0:
+ imx_iomux_v3_setup_multiple_pads(
+ usdhc3_pads, ARRAY_SIZE(usdhc3_pads));
+ break;
+ case 1:
+ imx_iomux_v3_setup_multiple_pads(
+ usdhc4_pads, ARRAY_SIZE(usdhc4_pads));
+ break;
+ default:
+ printf("Warning: you configured more USDHC controllers"
+ "(%d) then supported by the board (%d)\n",
+ index + 1, CONFIG_SYS_FSL_USDHC_NUM);
+ return status;
+ }
+
+ status |= fsl_esdhc_initialize(bis, &usdhc_cfg[index]);
+ }

- return fsl_esdhc_initialize(bis, &usdhc_cfg[0]);
+ return status;
}

#define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
--
1.9.3