1 /*
2  * (C) Copyright 2015 Rockchip Electronics Co., Ltd
3  *
4  * SPDX-License-Identifier:     GPL-2.0+
5  */
6 
7 #include <common.h>
8 #include <debug_uart.h>
9 #include <asm/io.h>
10 #include <asm/arch/bootrom.h>
11 #include <asm/arch/grf_rk3036.h>
12 #include <asm/arch/hardware.h>
13 #include <asm/arch/sdram_rk3036.h>
14 #include <asm/arch/timer.h>
15 #include <asm/arch/uart.h>
16 
17 DECLARE_GLOBAL_DATA_PTR;
18 
19 #define GRF_BASE	0x20008000
20 
21 #define DEBUG_UART_BASE	0x20068000
22 
23 void board_init_f(ulong dummy)
24 {
25 #ifdef EARLY_DEBUG
26 	struct rk3036_grf * const grf = (void *)GRF_BASE;
27 	/*
28 	 * NOTE: sd card and debug uart use same iomux in rk3036,
29 	 * so if you enable uart,
30 	 * you can not boot from sdcard
31 	 */
32 	rk_clrsetreg(&grf->gpio1c_iomux,
33 		     GPIO1C3_MASK << GPIO1C3_SHIFT |
34 		     GPIO1C2_MASK << GPIO1C2_SHIFT,
35 		     GPIO1C3_UART2_SOUT << GPIO1C3_SHIFT |
36 		     GPIO1C2_UART2_SIN << GPIO1C2_SHIFT);
37 	debug_uart_init();
38 #endif
39 	rockchip_timer_init();
40 	sdram_init();
41 
42 	/* return to maskrom */
43 	back_to_bootrom();
44 }
45 
46 /* Place Holders */
47 void board_init_r(gd_t *id, ulong dest_addr)
48 {
49 	/*
50 	 * Function attribute is no-return
51 	 * This Function never executes
52 	 */
53 	while (1)
54 		;
55 }
56 
57 void hang(void)
58 {
59 	while (1)
60 		;
61 }
62