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