arch/arm/mach-rockchip/rk3036/rk3036.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 <init.h>
   8 #include <asm/io.h>
   9 #include <asm/arch-rockchip/grf_rk3036.h>
  10 #include <asm/arch-rockchip/hardware.h>
  11 #include <asm/arch-rockchip/sdram_rk3036.h>
  12
  13 DECLARE_GLOBAL_DATA_PTR;
  14
  15 #ifdef CONFIG_DEBUG_UART_BOARD_INIT
  16 void board_debug_uart_init(void)
  17 {
  18 #define GRF_BASE        0x20008000
  19         struct rk3036_grf * const grf = (void *)GRF_BASE;
  20         enum {
  21                 GPIO1C3_SHIFT           = 6,
  22                 GPIO1C3_MASK            = 3 << GPIO1C3_SHIFT,
  23                 GPIO1C3_GPIO            = 0,
  24                 GPIO1C3_MMC0_D1,
  25                 GPIO1C3_UART2_SOUT,
  26
  27                 GPIO1C2_SHIFT           = 4,
  28                 GPIO1C2_MASK            = 3 << GPIO1C2_SHIFT,
  29                 GPIO1C2_GPIO            = 0,
  30                 GPIO1C2_MMC0_D0,
  31                 GPIO1C2_UART2_SIN,
  32         };
  33         /*
  34          * NOTE: sd card and debug uart use same iomux in rk3036,
  35          * so if you enable uart,
  36          * you can not boot from sdcard
  37          */
  38         rk_clrsetreg(&grf->gpio1c_iomux,
  39                      GPIO1C3_MASK << GPIO1C3_SHIFT |
  40                      GPIO1C2_MASK << GPIO1C2_SHIFT,
  41                      GPIO1C3_UART2_SOUT << GPIO1C3_SHIFT |
  42                      GPIO1C2_UART2_SIN << GPIO1C2_SHIFT);
  43 }
  44 #endif
  45
  46 #if !CONFIG_IS_ENABLED(RAM)
  47 /*
  48  * When CONFIG_RAM is enabled, the dram_init() function is implemented
  49  * in sdram.c.
  50  */
  51 int dram_init(void)
  52 {
  53         gd->ram_size = sdram_size();
  54
  55         return 0;
  56 }
  57 #endif