mx6ul_14x14_evk: Fix SPL boot hang

Currently the following SPL hang is observed:

U-Boot SPL 2020.01-rc5-00079-g797eee36a1 (Jan 06 2020 - 11:24:09 -0300)
Trying to boot from MMC1
Card did not respond to voltage select!
spl: mmc init failed with error: -95
SPL: failed to boot from all boot devices
### ERROR ### Please RESET the board ###

Fix it by moving the eSDHC2 initialization to SPL.

While at it, since this board uses DM_MMC all the esdhc board
code can be removed to make the code simpler.

Signed-off-by: Fabio Estevam <festevam@gmail.com>

1 files changed, 20 insertions, 155 deletions

diff --git a/board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c b/board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c
index 898da34..086e0e6 100644
--- a/board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c
+++ b/board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c
@@ -36,14 +36,6 @@ DECLARE_GLOBAL_DATA_PTR;
 	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |		\
 	PAD_CTL_DSE_40ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
 
-#define USDHC_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |		\
-	PAD_CTL_PUS_22K_UP  | PAD_CTL_SPEED_LOW |		\
-	PAD_CTL_DSE_80ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
-
-#define USDHC_DAT3_CD_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |	\
-	PAD_CTL_PUS_100K_DOWN  | PAD_CTL_SPEED_LOW |		\
-	PAD_CTL_DSE_80ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
-
 #define I2C_PAD_CTRL    (PAD_CTL_PKE | PAD_CTL_PUE |            \
 	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |               \
 	PAD_CTL_DSE_40ohm | PAD_CTL_HYS |			\
@@ -112,67 +104,6 @@ static iomux_v3_cfg_t const uart1_pads[] = {
 	MX6_PAD_UART1_RX_DATA__UART1_DCE_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
 };
 
-static iomux_v3_cfg_t const usdhc1_pads[] = {
-	MX6_PAD_SD1_CLK__USDHC1_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_SD1_CMD__USDHC1_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_SD1_DATA0__USDHC1_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_SD1_DATA1__USDHC1_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_SD1_DATA2__USDHC1_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_SD1_DATA3__USDHC1_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-
-	/* VSELECT */
-	MX6_PAD_GPIO1_IO05__USDHC1_VSELECT | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	/* CD */
-	MX6_PAD_UART1_RTS_B__GPIO1_IO19 | MUX_PAD_CTRL(NO_PAD_CTRL),
-	/* RST_B */
-	MX6_PAD_GPIO1_IO09__GPIO1_IO09 | MUX_PAD_CTRL(NO_PAD_CTRL),
-};
-
-/*
- * mx6ul_14x14_evk board default supports sd card. If want to use
- * EMMC, need to do board rework for sd2.
- * Introduce CONFIG_MX6UL_14X14_EVK_EMMC_REWORK, if sd2 reworked to support
- * emmc, need to define this macro.
- */
-#if defined(CONFIG_MX6UL_14X14_EVK_EMMC_REWORK)
-static iomux_v3_cfg_t const usdhc2_emmc_pads[] = {
-	MX6_PAD_NAND_RE_B__USDHC2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_NAND_WE_B__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_NAND_DATA00__USDHC2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_NAND_DATA01__USDHC2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_NAND_DATA02__USDHC2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_NAND_DATA03__USDHC2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_NAND_DATA04__USDHC2_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_NAND_DATA05__USDHC2_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_NAND_DATA06__USDHC2_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_NAND_DATA07__USDHC2_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-
-	/*
-	 * RST_B
-	 */
-	MX6_PAD_NAND_ALE__GPIO4_IO10 | MUX_PAD_CTRL(NO_PAD_CTRL),
-};
-#else
-static iomux_v3_cfg_t const usdhc2_pads[] = {
-	MX6_PAD_NAND_RE_B__USDHC2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_NAND_WE_B__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_NAND_DATA00__USDHC2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_NAND_DATA01__USDHC2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_NAND_DATA02__USDHC2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-	MX6_PAD_NAND_DATA03__USDHC2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
-};
-
-/*
- * The evk board uses DAT3 to detect CD card plugin,
- * in u-boot we mux the pin to GPIO when doing board_mmc_getcd.
- */
-static iomux_v3_cfg_t const usdhc2_cd_pad =
-	MX6_PAD_NAND_DATA03__GPIO4_IO05 | MUX_PAD_CTRL(USDHC_DAT3_CD_PAD_CTRL);
-
-static iomux_v3_cfg_t const usdhc2_dat3_pad =
-	MX6_PAD_NAND_DATA03__USDHC2_DATA3 |
-	MUX_PAD_CTRL(USDHC_DAT3_CD_PAD_CTRL);
-#endif
 
 static void setup_iomux_uart(void)
 {
@@ -189,101 +120,35 @@ static int board_qspi_init(void)
 }
 #endif
 
-#ifdef CONFIG_FSL_ESDHC_IMX
-static struct fsl_esdhc_cfg usdhc_cfg[2] = {
-	{USDHC1_BASE_ADDR, 0, 4},
-#if defined(CONFIG_MX6UL_14X14_EVK_EMMC_REWORK)
-	{USDHC2_BASE_ADDR, 0, 8},
-#else
-	{USDHC2_BASE_ADDR, 0, 4},
-#endif
+#ifdef CONFIG_SPL_BUILD
+
+#define USDHC_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |		\
+	PAD_CTL_PUS_22K_UP  | PAD_CTL_SPEED_LOW |		\
+	PAD_CTL_DSE_80ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
+
+static iomux_v3_cfg_t const usdhc2_pads[] = {
+	MX6_PAD_NAND_RE_B__USDHC2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_WE_B__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_DATA00__USDHC2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_DATA01__USDHC2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_DATA02__USDHC2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_DATA03__USDHC2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
 };
 
-#define USDHC1_CD_GPIO	IMX_GPIO_NR(1, 19)
-#define USDHC1_PWR_GPIO	IMX_GPIO_NR(1, 9)
-#define USDHC2_CD_GPIO	IMX_GPIO_NR(4, 5)
-#define USDHC2_PWR_GPIO	IMX_GPIO_NR(4, 10)
+static struct fsl_esdhc_cfg usdhc_cfg[1] = {
+	{USDHC2_BASE_ADDR, 0, 4},
+};
 
 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 USDHC1_BASE_ADDR:
-		ret = !gpio_get_value(USDHC1_CD_GPIO);
-		break;
-	case USDHC2_BASE_ADDR:
-#if defined(CONFIG_MX6UL_14X14_EVK_EMMC_REWORK)
-		ret = 1;
-#else
-		imx_iomux_v3_setup_pad(usdhc2_cd_pad);
-		gpio_request(USDHC2_CD_GPIO, "usdhc2 cd");
-		gpio_direction_input(USDHC2_CD_GPIO);
-
-		/*
-		 * Since it is the DAT3 pin, this pin is pulled to
-		 * low voltage if no card
-		 */
-		ret = gpio_get_value(USDHC2_CD_GPIO);
-
-		imx_iomux_v3_setup_pad(usdhc2_dat3_pad);
-#endif
-		break;
-	}
-
-	return ret;
+	return 1;
 }
 
 int board_mmc_init(bd_t *bis)
 {
-	int i, ret;
-
-	/*
-	 * According to the board_mmc_init() the following map is done:
-	 * (U-Boot device node)    (Physical Port)
-	 * mmc0                    USDHC1
-	 * mmc1                    USDHC2
-	 */
-	for (i = 0; i < CONFIG_SYS_FSL_USDHC_NUM; i++) {
-		switch (i) {
-		case 0:
-			imx_iomux_v3_setup_multiple_pads(
-				usdhc1_pads, ARRAY_SIZE(usdhc1_pads));
-			gpio_request(USDHC1_CD_GPIO, "usdhc1 cd");
-			gpio_direction_input(USDHC1_CD_GPIO);
-			usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
-
-			gpio_direction_output(USDHC1_PWR_GPIO, 0);
-			udelay(500);
-			gpio_direction_output(USDHC1_PWR_GPIO, 1);
-			break;
-		case 1:
-#if defined(CONFIG_MX6UL_14X14_EVK_EMMC_REWORK)
-			imx_iomux_v3_setup_multiple_pads(
-				usdhc2_emmc_pads, ARRAY_SIZE(usdhc2_emmc_pads));
-#else
-			imx_iomux_v3_setup_multiple_pads(
-				usdhc2_pads, ARRAY_SIZE(usdhc2_pads));
-#endif
-			gpio_request(USDHC2_PWR_GPIO, "usdhc2 pwr");
-			gpio_direction_output(USDHC2_PWR_GPIO, 0);
-			udelay(500);
-			gpio_direction_output(USDHC2_PWR_GPIO, 1);
-			usdhc_cfg[1].sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
-			break;
-		default:
-			printf("Warning: you configured more USDHC controllers (%d) than supported by the board\n", i + 1);
-			return -EINVAL;
-			}
-
-			ret = fsl_esdhc_initialize(bis, &usdhc_cfg[i]);
-			if (ret) {
-				printf("Warning: failed to initialize mmc dev %d\n", i);
-				return ret;
-			}
-	}
-	return 0;
+	imx_iomux_v3_setup_multiple_pads(usdhc2_pads, ARRAY_SIZE(usdhc2_pads));
+	usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
+	return fsl_esdhc_initialize(bis, &usdhc_cfg[0]);
 }
 #endif