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 }