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(BROM_BOOT_NEXTSTAGE);
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 }
85