board: stm32: Add Engicam i.Core STM32MP1 EDIMM2.2 Starter Kit

Engicam EDIMM2.2 Starter Kit is an EDIMM 2.2 Form Factor Capacitive
Evaluation Board.

Genaral features:
- LCD 7" C.Touch
- microSD slot
- Ethernet 1Gb
- Wifi/BT
- 2x LVDS Full HD interfaces
- 3x USB 2.0
- 1x USB 3.0
- HDMI Out
- Mini PCIe
- MIPI CSI
- 2x CAN
- Audio Out

i.Core STM32MP1 is an EDIMM SoM based on STM32MP157A from Engicam.

i.Core STM32MP1 needs to mount on top of this Evaluation board for
creating complete i.Core STM32MP1 EDIMM2.2 Starter Kit.

Linux dts commit details:

commit <adc0496104b6> ("ARM: dts: stm32: Add Engicam i.Core STM32MP1
EDIMM2.2 Starter Kit")

Add support for it.

Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

5 files changed, 202 insertions, 0 deletions

diff --git a/board/engicam/stm32mp1/Kconfig b/board/engicam/stm32mp1/Kconfig
new file mode 100644
index 0000000000..e7bccc09fb
--- /dev/null
+++ b/board/engicam/stm32mp1/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_ICORE_STM32MP1
+
+config SYS_BOARD
+	default "stm32mp1"
+
+config SYS_VENDOR
+	default "engicam"
+
+config SYS_CONFIG_NAME
+	default "stm32mp1"
+
+endif
diff --git a/board/engicam/stm32mp1/MAINTAINERS b/board/engicam/stm32mp1/MAINTAINERS
new file mode 100644
index 0000000000..552c7332d8
--- /dev/null
+++ b/board/engicam/stm32mp1/MAINTAINERS
@@ -0,0 +1,7 @@
+i.Core-STM32MP1-EDIMM2.2
+M:	Jagan Teki <jagan@amarulasolutions.com>
+M:	Matteo Lisi <matteo.lisi@engicam.com>
+S:	Maintained
+F:	arch/arm/dts/stm32mp15*icore*
+F:	board/engicam/stm32mp1
+F:	configs/stm32mp15-icore-stm32mp1-edimm2.2_defconfig
diff --git a/board/engicam/stm32mp1/Makefile b/board/engicam/stm32mp1/Makefile
new file mode 100644
index 0000000000..65560df290
--- /dev/null
+++ b/board/engicam/stm32mp1/Makefile
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
+#
+# Copyright (C) 2018, STMicroelectronics - All Rights Reserved
+#
+
+ifdef CONFIG_SPL_BUILD
+obj-y += spl.o
+else
+obj-y += stm32mp1.o
+endif
diff --git a/board/engicam/stm32mp1/spl.c b/board/engicam/stm32mp1/spl.c
new file mode 100644
index 0000000000..79adb5f529
--- /dev/null
+++ b/board/engicam/stm32mp1/spl.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
+/*
+ * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
+ * Copyright (C) 2020 Engicam S.r.l.
+ * Copyright (C) 2020 Amarula Solutions(India)
+ */
+
+#include <common.h>
+#include <asm/io.h>
+
+/* board early initialisation in board_f: need to use global variable */
+static u32 opp_voltage_mv __section(".data");
+
+void board_vddcore_init(u32 voltage_mv)
+{
+	if (IS_ENABLED(CONFIG_PMIC_STPMIC1) && CONFIG_IS_ENABLED(POWER_SUPPORT))
+		opp_voltage_mv = voltage_mv;
+}
+
+int board_early_init_f(void)
+{
+	return 0;
+}
+
+#ifdef CONFIG_DEBUG_UART_BOARD_INIT
+void board_debug_uart_init(void)
+{
+#if (CONFIG_DEBUG_UART_BASE == STM32_UART4_BASE)
+
+#define RCC_MP_APB1ENSETR (STM32_RCC_BASE + 0x0A00)
+#define RCC_MP_AHB4ENSETR (STM32_RCC_BASE + 0x0A28)
+
+	/* UART4 clock enable */
+	setbits_le32(RCC_MP_APB1ENSETR, BIT(16));
+
+#define GPIOG_BASE 0x50008000
+	/* GPIOG clock enable */
+	writel(BIT(6), RCC_MP_AHB4ENSETR);
+	/* GPIO configuration for ST boards: Uart4 TX = G11 */
+	writel(0xffbfffff, GPIOG_BASE + 0x00);
+	writel(0x00006000, GPIOG_BASE + 0x24);
+#else
+
+#error("CONFIG_DEBUG_UART_BASE: not supported value")
+
+#endif
+}
+#endif
diff --git a/board/engicam/stm32mp1/stm32mp1.c b/board/engicam/stm32mp1/stm32mp1.c
new file mode 100644
index 0000000000..8bf9c9c67d
--- /dev/null
+++ b/board/engicam/stm32mp1/stm32mp1.c
@@ -0,0 +1,125 @@
+// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
+/*
+ * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
+ * Copyright (C) 2020 Engicam S.r.l.
+ * Copyright (C) 2020 Amarula Solutions(India)
+ * Author: Jagan Teki <jagan@amarulasolutions.com>
+ */
+
+#include <common.h>
+#include <env.h>
+#include <env_internal.h>
+#include <syscon.h>
+#include <asm/io.h>
+#include <asm/arch/sys_proto.h>
+#include <power/regulator.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int checkboard(void)
+{
+	char *mode;
+	const char *fdt_compat;
+	int fdt_compat_len;
+
+	if (IS_ENABLED(CONFIG_TFABOOT))
+		mode = "trusted";
+	else
+		mode = "basic";
+
+	printf("Board: stm32mp1 in %s mode", mode);
+	fdt_compat = fdt_getprop(gd->fdt_blob, 0, "compatible",
+				 &fdt_compat_len);
+	if (fdt_compat && fdt_compat_len)
+		printf(" (%s)", fdt_compat);
+	puts("\n");
+
+	return 0;
+}
+
+/* board dependent setup after realloc */
+int board_init(void)
+{
+	/* address of boot parameters */
+	gd->bd->bi_boot_params = STM32_DDR_BASE + 0x100;
+
+	if (IS_ENABLED(CONFIG_DM_REGULATOR))
+		regulators_enable_boot_on(_DEBUG);
+
+	return 0;
+}
+
+int board_late_init(void)
+{
+	return 0;
+}
+
+enum env_location env_get_location(enum env_operation op, int prio)
+{
+	u32 bootmode = get_bootmode();
+
+	if (prio)
+		return ENVL_UNKNOWN;
+
+	switch (bootmode & TAMP_BOOT_DEVICE_MASK) {
+	case BOOT_FLASH_SD:
+	case BOOT_FLASH_EMMC:
+		if (CONFIG_IS_ENABLED(ENV_IS_IN_MMC))
+			return ENVL_MMC;
+		else if (CONFIG_IS_ENABLED(ENV_IS_IN_EXT4))
+			return ENVL_EXT4;
+		else
+			return ENVL_NOWHERE;
+
+	case BOOT_FLASH_NAND:
+	case BOOT_FLASH_SPINAND:
+		if (CONFIG_IS_ENABLED(ENV_IS_IN_UBI))
+			return ENVL_UBI;
+		else
+			return ENVL_NOWHERE;
+
+	case BOOT_FLASH_NOR:
+		if (CONFIG_IS_ENABLED(ENV_IS_IN_SPI_FLASH))
+			return ENVL_SPI_FLASH;
+		else
+			return ENVL_NOWHERE;
+
+	default:
+		return ENVL_NOWHERE;
+	}
+}
+
+const char *env_ext4_get_intf(void)
+{
+	u32 bootmode = get_bootmode();
+
+	switch (bootmode & TAMP_BOOT_DEVICE_MASK) {
+	case BOOT_FLASH_SD:
+	case BOOT_FLASH_EMMC:
+		return "mmc";
+	default:
+		return "";
+	}
+}
+
+const char *env_ext4_get_dev_part(void)
+{
+	static char *const dev_part[] = {"0:auto", "1:auto", "2:auto"};
+	u32 bootmode = get_bootmode();
+
+	return dev_part[(bootmode & TAMP_BOOT_INSTANCE_MASK) - 1];
+}
+
+int mmc_get_env_dev(void)
+{
+	u32 bootmode = get_bootmode();
+
+	return (bootmode & TAMP_BOOT_INSTANCE_MASK) - 1;
+}
+
+#if defined(CONFIG_OF_BOARD_SETUP)
+int ft_board_setup(void *blob, struct bd_info *bd)
+{
+	return 0;
+}
+#endif