arch/arm/mach-stm32mp/spl.c

   1 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
   2 /*
   3  * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
   4  */
   5
   6 #define LOG_CATEGORY LOGC_ARCH
   7
   8 #include <common.h>
   9 #include <cpu_func.h>
  10 #include <dm.h>
  11 #include <hang.h>
  12 #include <init.h>
  13 #include <log.h>
  14 #include <spl.h>
  15 #include <asm/cache.h>
  16 #include <asm/global_data.h>
  17 #include <asm/io.h>
  18 #include <asm/arch/sys_proto.h>
  19 #include <linux/libfdt.h>
  20
  21 u32 spl_boot_device(void)
  22 {
  23         u32 boot_mode;
  24
  25         boot_mode = get_bootmode();
  26
  27         switch (boot_mode) {
  28         case BOOT_FLASH_SD_1:
  29         case BOOT_FLASH_EMMC_1:
  30                 return BOOT_DEVICE_MMC1;
  31         case BOOT_FLASH_SD_2:
  32         case BOOT_FLASH_EMMC_2:
  33                 return BOOT_DEVICE_MMC2;
  34         case BOOT_SERIAL_UART_1:
  35         case BOOT_SERIAL_UART_2:
  36         case BOOT_SERIAL_UART_3:
  37         case BOOT_SERIAL_UART_4:
  38         case BOOT_SERIAL_UART_5:
  39         case BOOT_SERIAL_UART_6:
  40         case BOOT_SERIAL_UART_7:
  41         case BOOT_SERIAL_UART_8:
  42                 return BOOT_DEVICE_UART;
  43         case BOOT_SERIAL_USB_OTG:
  44                 return BOOT_DEVICE_USB;
  45         case BOOT_FLASH_NAND_FMC:
  46                 return BOOT_DEVICE_NAND;
  47         case BOOT_FLASH_NOR_QSPI:
  48                 return BOOT_DEVICE_SPI;
  49         case BOOT_FLASH_SPINAND_1:
  50                 return BOOT_DEVICE_NONE; /* SPINAND not supported in SPL */
  51         }
  52
  53         return BOOT_DEVICE_MMC1;
  54 }
  55
  56 u32 spl_mmc_boot_mode(const u32 boot_device)
  57 {
  58         return MMCSD_MODE_RAW;
  59 }
  60
  61 #ifdef CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
  62 int spl_mmc_boot_partition(const u32 boot_device)
  63 {
  64         switch (boot_device) {
  65         case BOOT_DEVICE_MMC1:
  66                 return CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION;
  67         case BOOT_DEVICE_MMC2:
  68                 return CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_MMC2;
  69         default:
  70                 return -EINVAL;
  71         }
  72 }
  73 #endif
  74
  75 #ifdef CONFIG_SPL_DISPLAY_PRINT
  76 void spl_display_print(void)
  77 {
  78         DECLARE_GLOBAL_DATA_PTR;
  79         const char *model;
  80
  81         /* same code than show_board_info() but not compiled for SPL
  82          * see CONFIG_DISPLAY_BOARDINFO & common/board_info.c
  83          */
  84         model = fdt_getprop(gd->fdt_blob, 0, "model", NULL);
  85         if (model)
  86                 log_info("Model: %s\n", model);
  87 }
  88 #endif
  89
  90 __weak int board_early_init_f(void)
  91 {
  92         return 0;
  93 }
  94
  95 void board_init_f(ulong dummy)
  96 {
  97         struct udevice *dev;
  98         int ret;
  99
 100         arch_cpu_init();
 101
 102         ret = spl_early_init();
 103         if (ret) {
 104                 log_debug("spl_early_init() failed: %d\n", ret);
 105                 hang();
 106         }
 107
 108         ret = uclass_get_device(UCLASS_CLK, 0, &dev);
 109         if (ret) {
 110                 log_debug("Clock init failed: %d\n", ret);
 111                 hang();
 112         }
 113
 114         ret = uclass_get_device(UCLASS_RESET, 0, &dev);
 115         if (ret) {
 116                 log_debug("Reset init failed: %d\n", ret);
 117                 hang();
 118         }
 119
 120         ret = uclass_get_device(UCLASS_PINCTRL, 0, &dev);
 121         if (ret) {
 122                 log_debug("%s: Cannot find pinctrl device\n", __func__);
 123                 hang();
 124         }
 125
 126         /* enable console uart printing */
 127         preloader_console_init();
 128
 129         ret = board_early_init_f();
 130         if (ret) {
 131                 log_debug("board_early_init_f() failed: %d\n", ret);
 132                 hang();
 133         }
 134
 135         ret = uclass_get_device(UCLASS_RAM, 0, &dev);
 136         if (ret) {
 137                 log_err("DRAM init failed: %d\n", ret);
 138                 hang();
 139         }
 140
 141         /*
 142          * activate cache on DDR only when DDR is fully initialized
 143          * to avoid speculative access and issue in get_ram_size()
 144          */
 145         if (!CONFIG_IS_ENABLED(SYS_DCACHE_OFF))
 146                 mmu_set_region_dcache_behaviour(STM32_DDR_BASE,
 147                                                 CONFIG_DDR_CACHEABLE_SIZE,
 148                                                 DCACHE_DEFAULT_OPTION);
 149 }
 150
 151 void spl_board_prepare_for_boot(void)
 152 {
 153         dcache_disable();
 154 }
 155
 156 void spl_board_prepare_for_linux(void)
 157 {
 158         dcache_disable();
 159 }