stm32mp1: add eMMC support for ED1

Add command GPT support
Add EMMC boot support
Add the 2 other SDMMC instances for ED1:
- SDMMC2 = mmc 1, eMMC on the ED1 board
- SDMMC3 = extension connector, deactivated by default

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>

arch/arm/dts/stm32mp157.dtsi

@@ -86,6 +86,20 @@
 			status = "disabled";
 		};
 
+		sdmmc3: sdmmc@48004000 {
+			compatible = "st,stm32-sdmmc2";
+			reg = <0x48004000 0x400>, <0x48005000 0x400>;
+			reg-names = "sdmmc", "delay";
+			interrupts = <GIC_SPI 137 IRQ_TYPE_NONE>;
+			clocks = <&rcc_clk SDMMC3_K>;
+			resets = <&rcc_rst SDMMC3_R>;
+			st,idma = <1>;
+			cap-sd-highspeed;
+			cap-mmc-highspeed;
+			max-frequency = <120000000>;
+			status = "disabled";
+		};
+
 		rcc: rcc@50000000 {
 			compatible = "syscon", "simple-mfd";
 
@@ -288,6 +302,20 @@
 			status = "disabled";
 		};
 
+		sdmmc2: sdmmc@58007000 {
+			compatible = "st,stm32-sdmmc2";
+			reg = <0x58007000 0x1000>, <0x58008000 0x1000>;
+			reg-names = "sdmmc", "delay";
+			interrupts = <GIC_SPI 124 IRQ_TYPE_NONE>;
+			clocks = <&rcc_clk SDMMC2_K>;
+			resets = <&rcc_rst SDMMC2_R>;
+			st,idma = <1>;
+			cap-sd-highspeed;
+			cap-mmc-highspeed;
+			max-frequency = <120000000>;
+			status = "disabled";
+		};
+
 		i2c4: i2c@5c002000 {
 			compatible = "st,stm32f7-i2c";
 			reg = <0x5c002000 0x400>;

arch/arm/dts/stm32mp157c-ed1-u-boot.dtsi

@@ -11,6 +11,7 @@
 / {
 	aliases {
 		mmc0 = &sdmmc1;
+		mmc1 = &sdmmc2;
 		i2c3 = &i2c4;
 	};
 };
@@ -77,6 +78,7 @@
 		CLK_SDMMC12_PLL3R
 		CLK_I2C46_PCLK5
 		CLK_I2C12_PCLK1
+		CLK_SDMMC3_PLL3R
 		CLK_I2C35_PCLK1
 		CLK_UART1_PCLK5
 		CLK_UART24_PCLK1
@@ -131,3 +133,22 @@
 &sdmmc1 {
 	u-boot,dm-spl;
 };
+
+/* MMC2 boot */
+&sdmmc2_b4_pins_a {
+	u-boot,dm-spl;
+	pins {
+		u-boot,dm-spl;
+	};
+};
+
+&sdmmc2_d47_pins_a {
+	u-boot,dm-spl;
+	pins {
+		u-boot,dm-spl;
+	};
+};
+
+&sdmmc2 {
+	u-boot,dm-spl;
+};

arch/arm/dts/stm32mp157c-ed1.dts

@@ -112,6 +112,31 @@
 			bias-pull-up;
 		};
 	};
+	sdmmc2_b4_pins_a: sdmmc2-b4@0 {
+		pins {
+			pinmux = <STM32_PINMUX('B', 14, AF9)>, /* SDMMC2_D0 */
+				 <STM32_PINMUX('B', 15, AF9)>, /* SDMMC2_D1 */
+				 <STM32_PINMUX('B', 3, AF9)>, /* SDMMC2_D2 */
+				 <STM32_PINMUX('B', 4, AF9)>, /* SDMMC2_D3 */
+				 <STM32_PINMUX('E', 3, AF9)>, /* SDMMC2_CK */
+				 <STM32_PINMUX('G', 6, AF10)>; /* SDMMC2_CMD */
+			slew-rate = <3>;
+			drive-push-pull;
+			bias-pull-up;
+		};
+	};
+
+	sdmmc2_d47_pins_a: sdmmc2-d47@0 {
+		pins {
+			pinmux = <STM32_PINMUX('A', 8, AF9)>, /* SDMMC2_D4 */
+				 <STM32_PINMUX('A', 9, AF10)>, /* SDMMC2_D5 */
+				 <STM32_PINMUX('E', 5, AF9)>, /* SDMMC2_D6 */
+				 <STM32_PINMUX('D', 3, AF9)>; /* SDMMC2_D7 */
+			slew-rate = <3>;
+			drive-push-pull;
+			bias-pull-up;
+		};
+	};
 };
 
 &pinctrl_z {
@@ -160,6 +185,18 @@
 	status = "okay";
 };
 
+&sdmmc2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&sdmmc2_b4_pins_a &sdmmc2_d47_pins_a>;
+	non-removable;
+	no-sd;
+	no-sdio;
+	st,dirpol;
+	st,negedge;
+	bus-width = <8>;
+	status = "okay";
+};
+
 &uart4 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart4_pins_a>;

board/st/stm32mp1/README

@@ -115,7 +115,31 @@ the supported device trees for stm32mp157 are:
    + FSBL = spl/u-boot-spl.stm32
    + SSBL = u-boot.img
 
-6. Prepare an SDCard
+6. Switch Setting for Boot Mode
+===============================
+
+You can select the boot mode, on the board ed1 with the switch SW1
+
+ -----------------------------------
+  Boot Mode   BOOT2   BOOT1   BOOT0
+ -----------------------------------
+  Reserved	0	0	0
+  NOR		0	0	1
+  SD-Card	1	1	1
+  SD-Card	1	0	1
+  eMMC		0	1	0
+  NAND		0	1	1
+  Recovery	1	1	0
+  Recovery	0	0	0
+
+Recovery is a boot from serial link (UART/USB) and it is used with
+STM32CubeProgrammer tool to load executable in RAM and to update the flash
+devices available on the board (NOR/NAND/eMMC/SDCARD).
+The communication between HOST and board is based on
+- for UARTs : the uart protocol used with all MCU STM32
+- for USB : based on USB DFU 1.1 (without the ST extensions used on MCU STM32)
+
+7. Prepare an SDCard
 ===================
 
 The minimal requirements for STMP32MP1 boot up to U-Boot are:
@@ -147,13 +171,13 @@ for example: with gpt table with 128 entries
 	# sgdisk -o /dev/<SDCard dev>
 
   b) create minimal image
-	# sgdisk	--resize-table=128 -a 1 \
+	# sgdisk --resize-table=128 -a 1 \
 		-n 1:34:545		-c 1:fsbl1 \
 		-n 2:546:1057		-c 2:fsbl2 \
 		-n 3:1058:5153		-c 3:ssbl \
 		-p /dev/<SDCard dev>
 
-	you can add other partition for kernel (rootfs)
+	you can add other partition for kernel (rootfs for example)
 
   c) copy the FSBL (2 times) and SSBL file on the correct partition.
      in this example in partition 1 to 3
@@ -163,29 +187,40 @@ for example: with gpt table with 128 entries
 	# dd if=u-boot-spl.stm32 of=/dev/mmcblk0p2
 	# dd if=u-boot.img of=/dev/mmcblk0p3
 
-7. Switch Setting
-==================
-
-You can select the boot mode, on the board ed1 with the switch SW1
+To boot from SDCard, select BootPinMode = 1 1 1 and reset.
 
- -----------------------------------
-  Boot Mode   BOOT2   BOOT1   BOOT0
- -----------------------------------
-  Reserved	0	0	0
-  NOR		0	0	1
-  SD-Card	1	1	1
-  SD-Card	1	0	1
-  eMMC		0	1	0
-  NAND		0	1	1
-  Recovery	1	1	0
-  Recovery	0	0	0
+8. Prepare eMMC
+===============
+You can use U-Boot to copy binary in eMMC.
 
+In the next example, you need to boot from SDCARD and the images (u-boot-spl.stm32, u-boot.img)
+are presents on SDCARD (mmc 0) in ext4 partition 4 (bootfs).
 
 To boot from SDCard, select BootPinMode = 1 1 1 and reset.
 
-Recovery is a boot from serial link (UART/USB) and it is used with
-STM32CubeProgrammer tool to load executable in RAM and to update the flash
-devices available on the board (NOR/NAND/eMMC/SDCARD).
-The communication between HOST and board is based on
-- for UARTs : the uart protocol used with all MCU STM32
-- for USB : based on USB DFU 1.1 (without the ST extensions used on MCU STM32)
+Then you update the eMMC with the next U-Boot command :
+
+a) prepare GPT on eMMC,
+	example with 2 partitions, bootfs and roots:
+
+	# setenv emmc_part "name=ssbl,size=2MiB;name=bootfs,type=linux,bootable,size=64MiB;name=rootfs,type=linux,size=512"
+	# gpt write mmc 1 ${emmc_part}
+
+b) copy SPL on eMMC on firts boot partition
+	(SPL max size is 256kB, with LBA 512, 0x200)
+
+	# ext4load mmc 0:4 0xC0000000 u-boot-spl.stm32
+	# mmc dev 1
+	# mmc partconf 1 1 1 1
+	# mmc write ${fileaddr} 0 200
+	# mmc partconf 1 1 1 0
+
+b) copy U-Boot in first GPT partition of eMMC
+
+	# ext4load mmc 0:4 0xC0000000 u-boot.img
+	# mmc dev 1
+	# part start mmc 1 1 partstart
+	# part size mmc 1 1 partsize
+	# mmc write ${fileaddr} ${partstart} ${partsize}
+
+To boot from eMMC, select BootPinMode = 0 1 0 and reset.

configs/stm32mp15_basic_defconfig

@@ -19,6 +19,7 @@ CONFIG_SYS_PROMPT="STM32MP> "
 # CONFIG_CMD_IMPORTENV is not set
 CONFIG_CMD_MEMINFO=y
 CONFIG_CMD_GPIO=y
+CONFIG_CMD_GPT=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_PMIC=y

include/configs/stm32mp1.h

@@ -71,6 +71,7 @@
 
 /*MMC SD*/
 #define CONFIG_SYS_MMC_MAX_DEVICE	3
+#define CONFIG_SUPPORT_EMMC_BOOT
 
 #if !defined(CONFIG_SPL) || !defined(CONFIG_SPL_BUILD)