[U-Boot] [PATCH] imx: mx6sxsabresd: support emmc

[Peng Fan]

From: Peng Fan <peng.fan at nxp.com>

For i.MX6SX SABRESD, USDHC4 can be used for SD and EMMC, default
it is used for SD.

This patch introduces EMMC pinmux settings and a new macro
CONFIG_MX6SXSABRESD_EMMC_REWORK. If the board has been reworked
to support emmc, need to enable this macro.

Signed-off-by: Peng Fan <peng.fan at nxp.com>
Cc: Stefano Babic <sbabic at denx.de>
---
 board/freescale/mx6sxsabresd/mx6sxsabresd.c | 32 +++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/board/freescale/mx6sxsabresd/mx6sxsabresd.c b/board/freescale/mx6sxsabresd/mx6sxsabresd.c
index 78f0151..6168b26 100644
--- a/board/freescale/mx6sxsabresd/mx6sxsabresd.c
+++ b/board/freescale/mx6sxsabresd/mx6sxsabresd.c
@@ -109,6 +109,20 @@ static iomux_v3_cfg_t const usdhc4_pads[] = {
 	MX6_PAD_SD4_DATA7__GPIO6_IO_21 | MUX_PAD_CTRL(NO_PAD_CTRL),
 };
 
+static iomux_v3_cfg_t const usdhc4_emmc_pads[] = {
+	MX6_PAD_SD4_CLK__USDHC4_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD4_CMD__USDHC4_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD4_DATA0__USDHC4_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD4_DATA1__USDHC4_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD4_DATA2__USDHC4_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD4_DATA3__USDHC4_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD4_DATA4__USDHC4_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD4_DATA5__USDHC4_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD4_DATA6__USDHC4_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD4_DATA7__USDHC4_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD4_RESET_B__USDHC4_RESET_B | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
 static iomux_v3_cfg_t const fec1_pads[] = {
 	MX6_PAD_ENET1_MDC__ENET1_MDC | MUX_PAD_CTRL(ENET_PAD_CTRL),
 	MX6_PAD_ENET1_MDIO__ENET1_MDIO | MUX_PAD_CTRL(ENET_PAD_CTRL),
@@ -302,7 +316,11 @@ int board_early_init_f(void)
 static struct fsl_esdhc_cfg usdhc_cfg[3] = {
 	{USDHC2_BASE_ADDR, 0, 4},
 	{USDHC3_BASE_ADDR},
+#ifdef CONFIG_MX6SXSABRESD_EMMC_REWORK
+	{USDHC4_BASE_ADDR, 0, 8},
+#else
 	{USDHC4_BASE_ADDR},
+#endif
 };
 
 #define USDHC3_CD_GPIO	IMX_GPIO_NR(2, 10)
@@ -327,7 +345,11 @@ int board_mmc_getcd(struct mmc *mmc)
 		ret = !gpio_get_value(USDHC3_CD_GPIO);
 		break;
 	case USDHC4_BASE_ADDR:
+#ifdef CONFIG_MX6SXSABRESD_EMMC_REWORK
+		ret = 1;
+#else
 		ret = !gpio_get_value(USDHC4_CD_GPIO);
+#endif
 		break;
 	}
 
@@ -361,9 +383,14 @@ int board_mmc_init(bd_t *bis)
 			usdhc_cfg[1].sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
 			break;
 		case 2:
+#ifdef CONFIG_MX6SXSABRESD_EMMC_REWORK
+			imx_iomux_v3_setup_multiple_pads(
+				usdhc4_emmc_pads, ARRAY_SIZE(usdhc4_emmc_pads));
+#else
 			imx_iomux_v3_setup_multiple_pads(
 				usdhc4_pads, ARRAY_SIZE(usdhc4_pads));
 			gpio_direction_input(USDHC4_CD_GPIO);
+#endif
 			usdhc_cfg[2].sdhc_clk = mxc_get_clock(MXC_ESDHC4_CLK);
 			break;
 		default:
@@ -410,9 +437,14 @@ int board_mmc_init(bd_t *bis)
 		usdhc_cfg[0].esdhc_base = USDHC3_BASE_ADDR;
 		break;
 	case 3:
+#ifdef CONFIG_MX6SXSABRESD_EMMC_REWORK
+			imx_iomux_v3_setup_multiple_pads(
+				usdhc4_emmc_pads, ARRAY_SIZE(usdhc4_emmc_pads));
+#else
 		imx_iomux_v3_setup_multiple_pads(
 			usdhc4_pads, ARRAY_SIZE(usdhc4_pads));
 		gpio_direction_input(USDHC4_CD_GPIO);
+#endif
 		usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC4_CLK);
 		usdhc_cfg[0].esdhc_base = USDHC4_BASE_ADDR;
 		break;
-- 
2.6.2