stm32: add support for stm32f7 & stm32f746 discovery board

This patch adds support for stm32f7 family & stm32f746 board.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>

4 files changed, 132 insertions, 0 deletions

diff --git a/board/st/stm32f746-disco/Kconfig b/board/st/stm32f746-disco/Kconfig
new file mode 100644
index 0000000..09289d2
--- /dev/null
+++ b/board/st/stm32f746-disco/Kconfig
@@ -0,0 +1,19 @@
+if TARGET_STM32F746_DISCO
+
+config SYS_BOARD
+	string
+	default "stm32f746-disco"
+
+config SYS_VENDOR
+	string
+	default "st"
+
+config SYS_SOC
+	string
+	default "stm32f7"
+
+config SYS_CONFIG_NAME
+	string
+	default "stm32f746-disco"
+
+endif
diff --git a/board/st/stm32f746-disco/MAINTAINERS b/board/st/stm32f746-disco/MAINTAINERS
new file mode 100644
index 0000000..2df0a65
--- /dev/null
+++ b/board/st/stm32f746-disco/MAINTAINERS
@@ -0,0 +1,6 @@
+STM32F746 DISCOVERY BOARD
+M:	Vikas Manocha <vikas.manocha@st.com>
+S:	Maintained
+F:	board/st/stm32f746-disco
+F:	include/configs/stm32f746-disco.h
+F:	configs/stm32f746-disco_defconfig
diff --git a/board/st/stm32f746-disco/Makefile b/board/st/stm32f746-disco/Makefile
new file mode 100644
index 0000000..db8a0a4
--- /dev/null
+++ b/board/st/stm32f746-disco/Makefile
@@ -0,0 +1,8 @@
+#
+# (C) Copyright 2016
+# Vikas Manocha <vikas.manocha@st.com>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	:= stm32f746-disco.o
diff --git a/board/st/stm32f746-disco/stm32f746-disco.c b/board/st/stm32f746-disco/stm32f746-disco.c
new file mode 100644
index 0000000..0e04d14
--- /dev/null
+++ b/board/st/stm32f746-disco/stm32f746-disco.c
@@ -0,0 +1,99 @@
+/*
+ * (C) Copyright 2016
+ * Vikas Manocha, <vikas.manocha@st.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/armv7m.h>
+#include <asm/arch/stm32.h>
+#include <asm/arch/gpio.h>
+#include <dm/platdata.h>
+#include <dm/platform_data/serial_stm32x7.h>
+#include <asm/arch/stm32_periph.h>
+#include <asm/arch/stm32_defs.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+const struct stm32_gpio_ctl gpio_ctl_gpout = {
+	.mode = STM32_GPIO_MODE_OUT,
+	.otype = STM32_GPIO_OTYPE_PP,
+	.speed = STM32_GPIO_SPEED_50M,
+	.pupd = STM32_GPIO_PUPD_NO,
+	.af = STM32_GPIO_AF0
+};
+
+const struct stm32_gpio_ctl gpio_ctl_usart = {
+	.mode = STM32_GPIO_MODE_AF,
+	.otype = STM32_GPIO_OTYPE_PP,
+	.speed = STM32_GPIO_SPEED_50M,
+	.pupd = STM32_GPIO_PUPD_UP,
+	.af = STM32_GPIO_AF7
+};
+
+static const struct stm32_gpio_dsc usart_gpio[] = {
+	{STM32_GPIO_PORT_A, STM32_GPIO_PIN_9},	/* TX */
+	{STM32_GPIO_PORT_B, STM32_GPIO_PIN_7},	/* RX */
+};
+
+int uart_setup_gpio(void)
+{
+	int i;
+	int rv = 0;
+
+	clock_setup(GPIO_A_CLOCK_CFG);
+	clock_setup(GPIO_B_CLOCK_CFG);
+	for (i = 0; i < ARRAY_SIZE(usart_gpio); i++) {
+		rv = stm32_gpio_config(&usart_gpio[i], &gpio_ctl_usart);
+		if (rv)
+			goto out;
+	}
+
+out:
+	return rv;
+}
+
+static const struct stm32x7_serial_platdata serial_platdata = {
+	.base = (struct stm32_usart *)USART1_BASE,
+	.clock = CONFIG_SYS_CLK_FREQ,
+};
+
+U_BOOT_DEVICE(stm32x7_serials) = {
+	.name = "serial_stm32x7",
+	.platdata = &serial_platdata,
+};
+
+u32 get_board_rev(void)
+{
+	return 0;
+}
+
+int board_early_init_f(void)
+{
+	int res;
+
+	res = uart_setup_gpio();
+	clock_setup(USART1_CLOCK_CFG);
+	if (res)
+		return res;
+
+	return 0;
+}
+
+int board_init(void)
+{
+	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
+
+	return 0;
+}
+
+int dram_init(void)
+{
+	gd->bd->bi_dram[0].start = CONFIG_SYS_RAM_BASE;
+	gd->bd->bi_dram[0].size  = CONFIG_SYS_RAM_SIZE;
+
+	gd->ram_size = CONFIG_SYS_RAM_SIZE;
+	return 0;
+}