arch/arm/mach-rockchip/rk3288-board-tpl.c

   1 /*
   2  * Copyright (C) 2017 Amarula Solutions
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <debug_uart.h>
   9 #include <dm.h>
  10 #include <ram.h>
  11 #include <spl.h>
  12 #include <version.h>
  13 #include <asm/io.h>
  14 #include <asm/arch/bootrom.h>
  15 #include <asm/arch/clock.h>
  16 #include <asm/arch/grf_rk3288.h>
  17 #include <asm/arch/periph.h>
  18 #include <asm/arch/pmu_rk3288.h>
  19 #include <asm/arch/sys_proto.h>
  20 #include <asm/arch/timer.h>
  21
  22 DECLARE_GLOBAL_DATA_PTR;
  23
  24 #define GRF_BASE                0xff770000
  25 void board_init_f(ulong dummy)
  26 {
  27         struct udevice *dev;
  28         int ret;
  29
  30         /* Example code showing how to enable the debug UART on RK3288 */
  31         /* Enable early UART on the RK3288 */
  32         struct rk3288_grf * const grf = (void *)GRF_BASE;
  33
  34         rk_clrsetreg(&grf->gpio7ch_iomux, GPIO7C7_MASK << GPIO7C7_SHIFT |
  35                      GPIO7C6_MASK << GPIO7C6_SHIFT,
  36                      GPIO7C7_UART2DBG_SOUT << GPIO7C7_SHIFT |
  37                      GPIO7C6_UART2DBG_SIN << GPIO7C6_SHIFT);
  38         /*
  39          * Debug UART can be used from here if required:
  40          *
  41          * debug_uart_init();
  42          * printch('a');
  43          * printhex8(0x1234);
  44          * printascii("string");
  45          */
  46         debug_uart_init();
  47
  48         ret = spl_early_init();
  49         if (ret) {
  50                 debug("spl_early_init() failed: %d\n", ret);
  51                 hang();
  52         }
  53
  54         rockchip_timer_init();
  55         configure_l2ctlr();
  56
  57         ret = rockchip_get_clk(&dev);
  58         if (ret) {
  59                 debug("CLK init failed: %d\n", ret);
  60                 return;
  61         }
  62
  63         ret = uclass_get_device(UCLASS_RAM, 0, &dev);
  64         if (ret) {
  65                 debug("DRAM init failed: %d\n", ret);
  66                 return;
  67         }
  68 }
  69
  70 void board_return_to_bootrom(void)
  71 {
  72         back_to_bootrom();
  73 }
  74
  75 u32 spl_boot_device(void)
  76 {
  77         return BOOT_DEVICE_BOOTROM;
  78 }
  79
  80 void spl_board_init(void)
  81 {
  82         puts("\nU-Boot TPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
  83                                 U_BOOT_TIME ")\n");
  84 }