arch/arm/mach-rockchip/tpl.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2019 Rockchip Electronics Co., Ltd
   4  */
   5
   6 #include <common.h>
   7 #include <debug_uart.h>
   8 #include <dm.h>
   9 #include <hang.h>
  10 #include <ram.h>
  11 #include <spl.h>
  12 #include <version.h>
  13 #include <asm/io.h>
  14 #include <asm/arch-rockchip/bootrom.h>
  15
  16 #define TIMER_LOAD_COUNT_L      0x00
  17 #define TIMER_LOAD_COUNT_H      0x04
  18 #define TIMER_CONTROL_REG       0x10
  19 #define TIMER_EN        0x1
  20 #define TIMER_FMODE     BIT(0)
  21 #define TIMER_RMODE     BIT(1)
  22
  23 __weak void rockchip_stimer_init(void)
  24 {
  25         /* If Timer already enabled, don't re-init it */
  26         u32 reg = readl(CONFIG_ROCKCHIP_STIMER_BASE + TIMER_CONTROL_REG);
  27
  28         if (reg & TIMER_EN)
  29                 return;
  30
  31 #ifndef CONFIG_ARM64
  32         asm volatile("mcr p15, 0, %0, c14, c0, 0"
  33                      : : "r"(COUNTER_FREQUENCY));
  34 #endif
  35
  36         writel(0, CONFIG_ROCKCHIP_STIMER_BASE + TIMER_CONTROL_REG);
  37         writel(0xffffffff, CONFIG_ROCKCHIP_STIMER_BASE);
  38         writel(0xffffffff, CONFIG_ROCKCHIP_STIMER_BASE + 4);
  39         writel(TIMER_EN | TIMER_FMODE, CONFIG_ROCKCHIP_STIMER_BASE +
  40                TIMER_CONTROL_REG);
  41 }
  42
  43 __weak int board_early_init_f(void)
  44 {
  45         return 0;
  46 }
  47
  48 void board_init_f(ulong dummy)
  49 {
  50         struct udevice *dev;
  51         int ret;
  52
  53         board_early_init_f();
  54
  55 #if defined(CONFIG_DEBUG_UART) && defined(CONFIG_TPL_SERIAL_SUPPORT)
  56         /*
  57          * Debug UART can be used from here if required:
  58          *
  59          * debug_uart_init();
  60          * printch('a');
  61          * printhex8(0x1234);
  62          * printascii("string");
  63          */
  64         debug_uart_init();
  65 #ifdef CONFIG_TPL_BANNER_PRINT
  66         printascii("\nU-Boot TPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
  67                                 U_BOOT_TIME ")\n");
  68 #endif
  69 #endif
  70         ret = spl_early_init();
  71         if (ret) {
  72                 debug("spl_early_init() failed: %d\n", ret);
  73                 hang();
  74         }
  75
  76         /* Init secure timer */
  77         rockchip_stimer_init();
  78         /* Init ARM arch timer in arch/arm/cpu/ */
  79         timer_init();
  80
  81         ret = uclass_get_device(UCLASS_RAM, 0, &dev);
  82         if (ret) {
  83                 printf("DRAM init failed: %d\n", ret);
  84                 return;
  85         }
  86 }
  87
  88 int board_return_to_bootrom(struct spl_image_info *spl_image,
  89                             struct spl_boot_device *bootdev)
  90 {
  91         back_to_bootrom(BROM_BOOT_NEXTSTAGE);
  92
  93         return 0;
  94 }
  95
  96 u32 spl_boot_device(void)
  97 {
  98         return BOOT_DEVICE_BOOTROM;
  99 }