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 <init.h>
  11 #include <log.h>
  12 #include <ram.h>
  13 #include <spl.h>
  14 #include <version.h>
  15 #include <asm/io.h>
  16 #include <asm/arch-rockchip/bootrom.h>
  17
  18 #define TIMER_LOAD_COUNT_L      0x00
  19 #define TIMER_LOAD_COUNT_H      0x04
  20 #define TIMER_CONTROL_REG       0x10
  21 #define TIMER_EN        0x1
  22 #define TIMER_FMODE     BIT(0)
  23 #define TIMER_RMODE     BIT(1)
  24
  25 __weak void rockchip_stimer_init(void)
  26 {
  27         /* If Timer already enabled, don't re-init it */
  28         u32 reg = readl(CONFIG_ROCKCHIP_STIMER_BASE + TIMER_CONTROL_REG);
  29
  30         if (reg & TIMER_EN)
  31                 return;
  32
  33 #ifndef CONFIG_ARM64
  34         asm volatile("mcr p15, 0, %0, c14, c0, 0"
  35                      : : "r"(COUNTER_FREQUENCY));
  36 #endif
  37
  38         writel(0, CONFIG_ROCKCHIP_STIMER_BASE + TIMER_CONTROL_REG);
  39         writel(0xffffffff, CONFIG_ROCKCHIP_STIMER_BASE);
  40         writel(0xffffffff, CONFIG_ROCKCHIP_STIMER_BASE + 4);
  41         writel(TIMER_EN | TIMER_FMODE, CONFIG_ROCKCHIP_STIMER_BASE +
  42                TIMER_CONTROL_REG);
  43 }
  44
  45 __weak int board_early_init_f(void)
  46 {
  47         return 0;
  48 }
  49
  50 void board_init_f(ulong dummy)
  51 {
  52         struct udevice *dev;
  53         int ret;
  54
  55         board_early_init_f();
  56
  57 #if defined(CONFIG_DEBUG_UART) && defined(CONFIG_TPL_SERIAL_SUPPORT)
  58         /*
  59          * Debug UART can be used from here if required:
  60          *
  61          * debug_uart_init();
  62          * printch('a');
  63          * printhex8(0x1234);
  64          * printascii("string");
  65          */
  66         debug_uart_init();
  67 #ifdef CONFIG_TPL_BANNER_PRINT
  68         printascii("\nU-Boot TPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
  69                                 U_BOOT_TIME ")\n");
  70 #endif
  71 #endif
  72         ret = spl_early_init();
  73         if (ret) {
  74                 debug("spl_early_init() failed: %d\n", ret);
  75                 hang();
  76         }
  77
  78         /* Init secure timer */
  79         rockchip_stimer_init();
  80         /* Init ARM arch timer in arch/arm/cpu/ */
  81         timer_init();
  82
  83         ret = uclass_get_device(UCLASS_RAM, 0, &dev);
  84         if (ret) {
  85                 printf("DRAM init failed: %d\n", ret);
  86                 return;
  87         }
  88 }
  89
  90 int board_return_to_bootrom(struct spl_image_info *spl_image,
  91                             struct spl_boot_device *bootdev)
  92 {
  93         back_to_bootrom(BROM_BOOT_NEXTSTAGE);
  94
  95         return 0;
  96 }
  97
  98 u32 spl_boot_device(void)
  99 {
 100         return BOOT_DEVICE_BOOTROM;
 101 }