stm32: add support for stm32f7 & stm32f746 discovery board
[oweals/u-boot.git] / board / st / stm32f746-disco / stm32f746-disco.c
1 /*
2  * (C) Copyright 2016
3  * Vikas Manocha, <vikas.manocha@st.com>
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8 #include <common.h>
9 #include <asm/io.h>
10 #include <asm/armv7m.h>
11 #include <asm/arch/stm32.h>
12 #include <asm/arch/gpio.h>
13 #include <dm/platdata.h>
14 #include <dm/platform_data/serial_stm32x7.h>
15 #include <asm/arch/stm32_periph.h>
16 #include <asm/arch/stm32_defs.h>
17
18 DECLARE_GLOBAL_DATA_PTR;
19
20 const struct stm32_gpio_ctl gpio_ctl_gpout = {
21         .mode = STM32_GPIO_MODE_OUT,
22         .otype = STM32_GPIO_OTYPE_PP,
23         .speed = STM32_GPIO_SPEED_50M,
24         .pupd = STM32_GPIO_PUPD_NO,
25         .af = STM32_GPIO_AF0
26 };
27
28 const struct stm32_gpio_ctl gpio_ctl_usart = {
29         .mode = STM32_GPIO_MODE_AF,
30         .otype = STM32_GPIO_OTYPE_PP,
31         .speed = STM32_GPIO_SPEED_50M,
32         .pupd = STM32_GPIO_PUPD_UP,
33         .af = STM32_GPIO_AF7
34 };
35
36 static const struct stm32_gpio_dsc usart_gpio[] = {
37         {STM32_GPIO_PORT_A, STM32_GPIO_PIN_9},  /* TX */
38         {STM32_GPIO_PORT_B, STM32_GPIO_PIN_7},  /* RX */
39 };
40
41 int uart_setup_gpio(void)
42 {
43         int i;
44         int rv = 0;
45
46         clock_setup(GPIO_A_CLOCK_CFG);
47         clock_setup(GPIO_B_CLOCK_CFG);
48         for (i = 0; i < ARRAY_SIZE(usart_gpio); i++) {
49                 rv = stm32_gpio_config(&usart_gpio[i], &gpio_ctl_usart);
50                 if (rv)
51                         goto out;
52         }
53
54 out:
55         return rv;
56 }
57
58 static const struct stm32x7_serial_platdata serial_platdata = {
59         .base = (struct stm32_usart *)USART1_BASE,
60         .clock = CONFIG_SYS_CLK_FREQ,
61 };
62
63 U_BOOT_DEVICE(stm32x7_serials) = {
64         .name = "serial_stm32x7",
65         .platdata = &serial_platdata,
66 };
67
68 u32 get_board_rev(void)
69 {
70         return 0;
71 }
72
73 int board_early_init_f(void)
74 {
75         int res;
76
77         res = uart_setup_gpio();
78         clock_setup(USART1_CLOCK_CFG);
79         if (res)
80                 return res;
81
82         return 0;
83 }
84
85 int board_init(void)
86 {
87         gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
88
89         return 0;
90 }
91
92 int dram_init(void)
93 {
94         gd->bd->bi_dram[0].start = CONFIG_SYS_RAM_BASE;
95         gd->bd->bi_dram[0].size  = CONFIG_SYS_RAM_SIZE;
96
97         gd->ram_size = CONFIG_SYS_RAM_SIZE;
98         return 0;
99 }