1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2019 Rockchip Electronics Co., Ltd
4 */
5 #include <asm/io.h>
6 #include <asm/arch-rockchip/grf_rk3036.h>
7 #include <asm/arch-rockchip/hardware.h>
8 #include <asm/arch-rockchip/sdram_rk3036.h>
9
10 DECLARE_GLOBAL_DATA_PTR;
11
12 #ifdef CONFIG_DEBUG_UART_BOARD_INIT
board_debug_uart_init(void)13 void board_debug_uart_init(void)
14 {
15 #define GRF_BASE 0x20008000
16 struct rk3036_grf * const grf = (void *)GRF_BASE;
17 enum {
18 GPIO1C3_SHIFT = 6,
19 GPIO1C3_MASK = 3 << GPIO1C3_SHIFT,
20 GPIO1C3_GPIO = 0,
21 GPIO1C3_MMC0_D1,
22 GPIO1C3_UART2_SOUT,
23
24 GPIO1C2_SHIFT = 4,
25 GPIO1C2_MASK = 3 << GPIO1C2_SHIFT,
26 GPIO1C2_GPIO = 0,
27 GPIO1C2_MMC0_D0,
28 GPIO1C2_UART2_SIN,
29 };
30 /*
31 * NOTE: sd card and debug uart use same iomux in rk3036,
32 * so if you enable uart,
33 * you can not boot from sdcard
34 */
35 rk_clrsetreg(&grf->gpio1c_iomux,
36 GPIO1C3_MASK << GPIO1C3_SHIFT |
37 GPIO1C2_MASK << GPIO1C2_SHIFT,
38 GPIO1C3_UART2_SOUT << GPIO1C3_SHIFT |
39 GPIO1C2_UART2_SIN << GPIO1C2_SHIFT);
40 }
41 #endif
42
43 #if !CONFIG_IS_ENABLED(RAM)
44 /*
45 * When CONFIG_RAM is enabled, the dram_init() function is implemented
46 * in sdram.c.
47 */
dram_init(void)48 int dram_init(void)
49 {
50 gd->ram_size = sdram_size();
51
52 return 0;
53 }
54 #endif
55