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 <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/fmc.h>
  17 #include <dm/platform_data/serial_stm32x7.h>
  18 #include <asm/arch/stm32_periph.h>
  19 #include <asm/arch/stm32_defs.h>
  20 #include <asm/arch/syscfg.h>
  21 #include <asm/gpio.h>
  22
  23 DECLARE_GLOBAL_DATA_PTR;
  24
  25 int get_memory_base_size(fdt_addr_t *mr_base, fdt_addr_t *mr_size)
  26 {
  27         int mr_node;
  28
  29         mr_node = fdt_path_offset(gd->fdt_blob, "/memory");
  30         if (mr_node < 0)
  31                 return mr_node;
  32         *mr_base = fdtdec_get_addr_size_auto_noparent(gd->fdt_blob, mr_node,
  33                                                       "reg", 0, mr_size, false);
  34         debug("mr_base = %lx, mr_size= %lx\n", *mr_base, *mr_size);
  35
  36         return 0;
  37 }
  38 int dram_init(void)
  39 {
  40         int rv;
  41         fdt_addr_t mr_base, mr_size;
  42
  43 #ifndef CONFIG_SUPPORT_SPL
  44         struct udevice *dev;
  45         rv = uclass_get_device(UCLASS_RAM, 0, &dev);
  46         if (rv) {
  47                 debug("DRAM init failed: %d\n", rv);
  48                 return rv;
  49         }
  50
  51 #endif
  52         rv = get_memory_base_size(&mr_base, &mr_size);
  53         if (rv)
  54                 return rv;
  55         gd->ram_size = mr_size;
  56         gd->ram_top = mr_base;
  57
  58         return rv;
  59 }
  60
  61 int dram_init_banksize(void)
  62 {
  63         fdt_addr_t mr_base, mr_size;
  64         get_memory_base_size(&mr_base, &mr_size);
  65         /*
  66          * Fill in global info with description of SRAM configuration
  67          */
  68         gd->bd->bi_dram[0].start = mr_base;
  69         gd->bd->bi_dram[0].size  = mr_size;
  70
  71         return 0;
  72 }
  73
  74 #ifdef CONFIG_ETH_DESIGNWARE
  75 static int stmmac_setup(void)
  76 {
  77         clock_setup(SYSCFG_CLOCK_CFG);
  78         /* Set >RMII mode */
  79         STM32_SYSCFG->pmc |= SYSCFG_PMC_MII_RMII_SEL;
  80         clock_setup(STMMAC_CLOCK_CFG);
  81
  82         return 0;
  83 }
  84
  85 int board_early_init_f(void)
  86 {
  87         stmmac_setup();
  88
  89         return 0;
  90 }
  91 #endif
  92
  93 #ifdef CONFIG_SPL_BUILD
  94 #ifdef CONFIG_SPL_OS_BOOT
  95 int spl_start_uboot(void)
  96 {
  97         debug("SPL: booting kernel\n");
  98         /* break into full u-boot on 'c' */
  99         return serial_tstc() && serial_getc() == 'c';
 100 }
 101 #endif
 102
 103 int spl_dram_init(void)
 104 {
 105         struct udevice *dev;
 106         int rv;
 107         rv = uclass_get_device(UCLASS_RAM, 0, &dev);
 108         if (rv)
 109                 debug("DRAM init failed: %d\n", rv);
 110         return rv;
 111 }
 112 void spl_board_init(void)
 113 {
 114         spl_dram_init();
 115         preloader_console_init();
 116         arch_cpu_init(); /* to configure mpu for sdram rw permissions */
 117 }
 118 u32 spl_boot_device(void)
 119 {
 120         return BOOT_DEVICE_XIP;
 121 }
 122
 123 #endif
 124 u32 get_board_rev(void)
 125 {
 126         return 0;
 127 }
 128
 129 int board_late_init(void)
 130 {
 131         struct gpio_desc gpio = {};
 132         int node;
 133
 134         node = fdt_node_offset_by_compatible(gd->fdt_blob, 0, "st,led1");
 135         if (node < 0)
 136                 return -1;
 137
 138         gpio_request_by_name_nodev(offset_to_ofnode(node), "led-gpio", 0, &gpio,
 139                                    GPIOD_IS_OUT);
 140
 141         if (dm_gpio_is_valid(&gpio)) {
 142                 dm_gpio_set_value(&gpio, 0);
 143                 mdelay(10);
 144                 dm_gpio_set_value(&gpio, 1);
 145         }
 146
 147         /* read button 1*/
 148         node = fdt_node_offset_by_compatible(gd->fdt_blob, 0, "st,button1");
 149         if (node < 0)
 150                 return -1;
 151
 152         gpio_request_by_name_nodev(offset_to_ofnode(node), "button-gpio", 0,
 153                                    &gpio, GPIOD_IS_IN);
 154
 155         if (dm_gpio_is_valid(&gpio)) {
 156                 if (dm_gpio_get_value(&gpio))
 157                         puts("usr button is at HIGH LEVEL\n");
 158                 else
 159                         puts("usr button is at LOW LEVEL\n");
 160         }
 161
 162         return 0;
 163 }
 164
 165 int board_init(void)
 166 {
 167         gd->bd->bi_boot_params = gd->bd->bi_dram[0].start + 0x100;
 168         return 0;
 169 }