colibri-imx6ull: add emmc variant

Add code to build the eMMC variant of the Colibri iMX6ULL, i.e. the
'Colibri iMX6ULL 1GB' which has a eMMC instead of the raw NAND used
on other SKUs.

Related-to: ELB-4056, ELB-4057
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>

3 files changed, 77 insertions, 4 deletions

diff --git a/board/toradex/colibri-imx6ull/Kconfig b/board/toradex/colibri-imx6ull/Kconfig
index e5e4af3..9fbc30f 100644
--- a/board/toradex/colibri-imx6ull/Kconfig
+++ b/board/toradex/colibri-imx6ull/Kconfig
@@ -1,5 +1,24 @@
 if TARGET_COLIBRI_IMX6ULL
 
+choice
+	prompt "Colibri iMX6ULL variant"
+	optional
+
+config TARGET_COLIBRI_IMX6ULL_NAND
+	bool "Support Colibri iMX6ULL 256MB / 512MB (raw NAND) modules"
+	imply NAND_MXS
+	help
+	  Choose this option if you build for a Toradex Colibri iMX6ULL
+	  256MB or 512MB module which do have raw NAND on-module.
+
+config TARGET_COLIBRI_IMX6ULL_EMMC
+	bool "Support Colibri iMX6ULL 1GB (eMMC) modules"
+	help
+	  Choose this option if you build for a Toradex Colibri iMX6ULL
+	  1GB module which does have eMMC on-module.
+
+endchoice
+
 config SYS_BOARD
 	default "colibri-imx6ull"
 
@@ -7,11 +26,16 @@ config SYS_VENDOR
 	default "toradex"
 
 config SYS_CONFIG_NAME
-	default "colibri-imx6ull"
+	default "colibri-imx6ull-tezi-recovery" if (!TARGET_COLIBRI_IMX6ULL_NAND && !TARGET_COLIBRI_IMX6ULL_EMMC)
 
 config TDX_CFG_BLOCK
 	default y
 
+if TARGET_COLIBRI_IMX6ULL_NAND
+
+config SYS_CONFIG_NAME
+	default "colibri-imx6ull"
+
 config TDX_HAVE_NAND
 	default y
 
@@ -21,6 +45,28 @@ config TDX_CFG_BLOCK_OFFSET
 config TDX_CFG_BLOCK_OFFSET2
 	default "133120"
 
+endif
+
+if TARGET_COLIBRI_IMX6ULL_EMMC
+
+config SYS_CONFIG_NAME
+	default "colibri-imx6ull"
+
+config TDX_HAVE_MMC
+	default y
+
+config TDX_CFG_BLOCK_DEV
+	default "0"
+
+config TDX_CFG_BLOCK_PART
+	default "1"
+
+# Toradex config block in eMMC, at the end of 1st "boot sector"
+config TDX_CFG_BLOCK_OFFSET
+	default "-512"
+
+endif
+
 config TDX_CFG_BLOCK_2ND_ETHADDR
 	default y
 
diff --git a/board/toradex/colibri-imx6ull/MAINTAINERS b/board/toradex/colibri-imx6ull/MAINTAINERS
index eb491c2..500c787 100644
--- a/board/toradex/colibri-imx6ull/MAINTAINERS
+++ b/board/toradex/colibri-imx6ull/MAINTAINERS
@@ -4,8 +4,10 @@ W:	http://developer.toradex.com/software/linux/linux-software
 W:	https://www.toradex.com/community
 S:	Maintained
 F:	arch/arm/dts/imx6ull-colibri.dts
-F:	arch/arm/dts/imx6ull-colibri-u-boot.dtsi
 F:	arch/arm/dts/imx6ull-colibri.dtsi
+F:	arch/arm/dts/imx6ull-colibri-emmc.dts
+F:	arch/arm/dts/imx6ull-colibri-u-boot.dtsi
 F:	board/toradex/colibri-imx6ull/
 F:	configs/colibri-imx6ull_defconfig
+F:	configs/colibri-imx6ull-emmc_defconfig
 F:	include/configs/colibri-imx6ull.h
diff --git a/board/toradex/colibri-imx6ull/colibri-imx6ull.c b/board/toradex/colibri-imx6ull/colibri-imx6ull.c
index fd54688..02ab588 100644
--- a/board/toradex/colibri-imx6ull/colibri-imx6ull.c
+++ b/board/toradex/colibri-imx6ull/colibri-imx6ull.c
@@ -43,6 +43,14 @@ DECLARE_GLOBAL_DATA_PTR;
 
 #define NAND_PAD_READY0_CTRL (PAD_CTL_DSE_48ohm | PAD_CTL_PUS_22K_UP)
 
+#define FLASH_DETECTION_CTRL (PAD_CTL_HYS | PAD_CTL_PUE)
+#define FLASH_DET_GPIO	IMX_GPIO_NR(4, 1)
+static const iomux_v3_cfg_t flash_detection_pads[] = {
+	MX6_PAD_NAND_WE_B__GPIO4_IO01 | MUX_PAD_CTRL(FLASH_DETECTION_CTRL),
+};
+
+static bool is_emmc;
+
 int dram_init(void)
 {
 	gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);
@@ -60,7 +68,7 @@ static void setup_gpmi_nand(void)
 #endif /* CONFIG_NAND_MXS */
 
 #ifdef CONFIG_DM_VIDEO
-static iomux_v3_cfg_t const backlight_pads[] = {
+static const iomux_v3_cfg_t backlight_pads[] = {
 	/* Backlight On */
 	MX6_PAD_JTAG_TMS__GPIO1_IO11		| MUX_PAD_CTRL(NO_PAD_CTRL),
 	/* Backlight PWM<A> (multiplexed pin) */
@@ -121,6 +129,16 @@ int board_init(void)
 	/* address of boot parameters */
 	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
 
+	/*
+	 * Enable GPIO on NAND_WE_B/eMMC_RST with 100k pull-down. eMMC_RST
+	 * is pulled high with 4.7k for eMMC devices. This allows to reliably
+	 * detect eMMC/NAND flash
+	 */
+	imx_iomux_v3_setup_multiple_pads(flash_detection_pads, ARRAY_SIZE(flash_detection_pads));
+	gpio_request(FLASH_DET_GPIO, "flash-detection-gpio");
+	is_emmc = gpio_get_value(FLASH_DET_GPIO);
+	gpio_free(FLASH_DET_GPIO);
+
 #ifdef CONFIG_FEC_MXC
 	setup_fec();
 #endif
@@ -149,8 +167,15 @@ int board_late_init(void)
 	 * Wi-Fi/Bluetooth make sure we use the -wifi device tree.
 	 */
 	if (tdx_hw_tag.prodid == COLIBRI_IMX6ULL_WIFI_BT_IT ||
-	    tdx_hw_tag.prodid == COLIBRI_IMX6ULL_WIFI_BT)
+	    tdx_hw_tag.prodid == COLIBRI_IMX6ULL_WIFI_BT) {
 		env_set("variant", "-wifi");
+	} else {
+		if (is_emmc)
+			env_set("variant", "-emmc");
+	}
+#else
+	if (is_emmc)
+		env_set("variant", "-emmc");
 #endif
 
 	/*