1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2015 Rockchip Electronics Co., Ltd
4  */
5 
6 #include <common.h>
7 #include <debug_uart.h>
8 #include <asm/io.h>
9 #include <asm/arch/bootrom.h>
10 #include <asm/arch/grf_rk3036.h>
11 #include <asm/arch/hardware.h>
12 #include <asm/arch/sdram_rk3036.h>
13 #include <asm/arch/timer.h>
14 #include <asm/arch/uart.h>
15 
16 #define GRF_BASE	0x20008000
17 
18 #define DEBUG_UART_BASE	0x20068000
19 
20 void board_init_f(ulong dummy)
21 {
22 #ifdef EARLY_DEBUG
23 	struct rk3036_grf * const grf = (void *)GRF_BASE;
24 	/*
25 	 * NOTE: sd card and debug uart use same iomux in rk3036,
26 	 * so if you enable uart,
27 	 * you can not boot from sdcard
28 	 */
29 	rk_clrsetreg(&grf->gpio1c_iomux,
30 		     GPIO1C3_MASK << GPIO1C3_SHIFT |
31 		     GPIO1C2_MASK << GPIO1C2_SHIFT,
32 		     GPIO1C3_UART2_SOUT << GPIO1C3_SHIFT |
33 		     GPIO1C2_UART2_SIN << GPIO1C2_SHIFT);
34 	debug_uart_init();
35 #endif
36 	rockchip_timer_init();
37 	sdram_init();
38 
39 	/* return to maskrom */
40 	back_to_bootrom(BROM_BOOT_NEXTSTAGE);
41 }
42 
43 /* Place Holders */
44 void board_init_r(gd_t *id, ulong dest_addr)
45 {
46 	/*
47 	 * Function attribute is no-return
48 	 * This Function never executes
49 	 */
50 	while (1)
51 		;
52 }
53