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 #include <linux/bitops.h>
  18
  19 #define TIMER_LOAD_COUNT_L      0x00
  20 #define TIMER_LOAD_COUNT_H      0x04
  21 #define TIMER_CONTROL_REG       0x10
  22 #define TIMER_EN        0x1
  23 #define TIMER_FMODE     BIT(0)
  24 #define TIMER_RMODE     BIT(1)
  25
  26 __weak void rockchip_stimer_init(void)
  27 {
  28         /* If Timer already enabled, don't re-init it */
  29         u32 reg = readl(CONFIG_ROCKCHIP_STIMER_BASE + TIMER_CONTROL_REG);
  30
  31         if (reg & TIMER_EN)
  32                 return;
  33
  34 #ifndef CONFIG_ARM64
  35         asm volatile("mcr p15, 0, %0, c14, c0, 0"
  36                      : : "r"(COUNTER_FREQUENCY));
  37 #endif
  38
  39         writel(0, CONFIG_ROCKCHIP_STIMER_BASE + TIMER_CONTROL_REG);
  40         writel(0xffffffff, CONFIG_ROCKCHIP_STIMER_BASE);
  41         writel(0xffffffff, CONFIG_ROCKCHIP_STIMER_BASE + 4);
  42         writel(TIMER_EN | TIMER_FMODE, CONFIG_ROCKCHIP_STIMER_BASE +
  43                TIMER_CONTROL_REG);
  44 }
  45
  46 __weak int board_early_init_f(void)
  47 {
  48         return 0;
  49 }
  50
  51 void board_init_f(ulong dummy)
  52 {
  53         struct udevice *dev;
  54         int ret;
  55
  56         board_early_init_f();
  57
  58 #if defined(CONFIG_DEBUG_UART) && defined(CONFIG_TPL_SERIAL_SUPPORT)
  59         /*
  60          * Debug UART can be used from here if required:
  61          *
  62          * debug_uart_init();
  63          * printch('a');
  64          * printhex8(0x1234);
  65          * printascii("string");
  66          */
  67         debug_uart_init();
  68 #ifdef CONFIG_TPL_BANNER_PRINT
  69         printascii("\nU-Boot TPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
  70                                 U_BOOT_TIME ")\n");
  71 #endif
  72 #endif
  73         ret = spl_early_init();
  74         if (ret) {
  75                 debug("spl_early_init() failed: %d\n", ret);
  76                 hang();
  77         }
  78
  79         /* Init secure timer */
  80         rockchip_stimer_init();
  81         /* Init ARM arch timer in arch/arm/cpu/ */
  82         timer_init();
  83
  84         ret = uclass_get_device(UCLASS_RAM, 0, &dev);
  85         if (ret) {
  86                 printf("DRAM init failed: %d\n", ret);
  87                 return;
  88         }
  89 }
  90
  91 int board_return_to_bootrom(struct spl_image_info *spl_image,
  92                             struct spl_boot_device *bootdev)
  93 {
  94         back_to_bootrom(BROM_BOOT_NEXTSTAGE);
  95
  96         return 0;
  97 }
  98
  99 u32 spl_boot_device(void)
 100 {
 101         return BOOT_DEVICE_BOOTROM;
 102 }