board/st/stm32f746-disco/stm32f746-disco.c

   1 /*
   2  * Copyright (C) 2016, STMicroelectronics - All Rights Reserved
   3  * Author(s): Vikas Manocha, <vikas.manocha@st.com> for STMicroelectronics.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <dm.h>
  10 #include <ram.h>
  11 #include <spl.h>
  12 #include <asm/io.h>
  13 #include <asm/armv7m.h>
  14 #include <asm/arch/stm32.h>
  15 #include <asm/arch/gpio.h>
  16 #include <asm/arch/stm32_periph.h>
  17 #include <asm/arch/stm32_defs.h>
  18 #include <asm/arch/syscfg.h>
  19 #include <asm/gpio.h>
  20
  21 DECLARE_GLOBAL_DATA_PTR;
  22
  23 int get_memory_base_size(fdt_addr_t *mr_base, fdt_addr_t *mr_size)
  24 {
  25         int mr_node;
  26
  27         mr_node = fdt_path_offset(gd->fdt_blob, "/memory");
  28         if (mr_node < 0)
  29                 return mr_node;
  30         *mr_base = fdtdec_get_addr_size_auto_noparent(gd->fdt_blob, mr_node,
  31                                                       "reg", 0, mr_size, false);
  32         debug("mr_base = %lx, mr_size= %lx\n", *mr_base, *mr_size);
  33
  34         return 0;
  35 }
  36 int dram_init(void)
  37 {
  38         int rv;
  39         fdt_addr_t mr_base, mr_size;
  40
  41 #ifndef CONFIG_SUPPORT_SPL
  42         struct udevice *dev;
  43         rv = uclass_get_device(UCLASS_RAM, 0, &dev);
  44         if (rv) {
  45                 debug("DRAM init failed: %d\n", rv);
  46                 return rv;
  47         }
  48
  49 #endif
  50         rv = get_memory_base_size(&mr_base, &mr_size);
  51         if (rv)
  52                 return rv;
  53         gd->ram_size = mr_size;
  54         gd->ram_top = mr_base;
  55
  56         return rv;
  57 }
  58
  59 int dram_init_banksize(void)
  60 {
  61         fdt_addr_t mr_base, mr_size;
  62         get_memory_base_size(&mr_base, &mr_size);
  63         /*
  64          * Fill in global info with description of SRAM configuration
  65          */
  66         gd->bd->bi_dram[0].start = mr_base;
  67         gd->bd->bi_dram[0].size  = mr_size;
  68
  69         return 0;
  70 }
  71
  72 #ifdef CONFIG_ETH_DESIGNWARE
  73 static int stmmac_setup(void)
  74 {
  75         clock_setup(SYSCFG_CLOCK_CFG);
  76         /* Set >RMII mode */
  77         STM32_SYSCFG->pmc |= SYSCFG_PMC_MII_RMII_SEL;
  78
  79         return 0;
  80 }
  81
  82 int board_early_init_f(void)
  83 {
  84         stmmac_setup();
  85
  86         return 0;
  87 }
  88 #endif
  89
  90 #ifdef CONFIG_SPL_BUILD
  91 #ifdef CONFIG_SPL_OS_BOOT
  92 int spl_start_uboot(void)
  93 {
  94         debug("SPL: booting kernel\n");
  95         /* break into full u-boot on 'c' */
  96         return serial_tstc() && serial_getc() == 'c';
  97 }
  98 #endif
  99
 100 int spl_dram_init(void)
 101 {
 102         struct udevice *dev;
 103         int rv;
 104         rv = uclass_get_device(UCLASS_RAM, 0, &dev);
 105         if (rv)
 106                 debug("DRAM init failed: %d\n", rv);
 107         return rv;
 108 }
 109 void spl_board_init(void)
 110 {
 111         spl_dram_init();
 112         preloader_console_init();
 113         arch_cpu_init(); /* to configure mpu for sdram rw permissions */
 114 }
 115 u32 spl_boot_device(void)
 116 {
 117         return BOOT_DEVICE_XIP;
 118 }
 119
 120 #endif
 121 u32 get_board_rev(void)
 122 {
 123         return 0;
 124 }
 125
 126 int board_late_init(void)
 127 {
 128         struct gpio_desc gpio = {};
 129         int node;
 130
 131         node = fdt_node_offset_by_compatible(gd->fdt_blob, 0, "st,led1");
 132         if (node < 0)
 133                 return -1;
 134
 135         gpio_request_by_name_nodev(offset_to_ofnode(node), "led-gpio", 0, &gpio,
 136                                    GPIOD_IS_OUT);
 137
 138         if (dm_gpio_is_valid(&gpio)) {
 139                 dm_gpio_set_value(&gpio, 0);
 140                 mdelay(10);
 141                 dm_gpio_set_value(&gpio, 1);
 142         }
 143
 144         /* read button 1*/
 145         node = fdt_node_offset_by_compatible(gd->fdt_blob, 0, "st,button1");
 146         if (node < 0)
 147                 return -1;
 148
 149         gpio_request_by_name_nodev(offset_to_ofnode(node), "button-gpio", 0,
 150                                    &gpio, GPIOD_IS_IN);
 151
 152         if (dm_gpio_is_valid(&gpio)) {
 153                 if (dm_gpio_get_value(&gpio))
 154                         puts("usr button is at HIGH LEVEL\n");
 155                 else
 156                         puts("usr button is at LOW LEVEL\n");
 157         }
 158
 159         return 0;
 160 }
 161
 162 int board_init(void)
 163 {
 164         gd->bd->bi_boot_params = gd->bd->bi_dram[0].start + 0x100;
 165         return 0;
 166 }