1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2017 Amarula Solutions
4  */
5 
6 #include <common.h>
7 #include <debug_uart.h>
8 #include <dm.h>
9 #include <ram.h>
10 #include <spl.h>
11 #include <version.h>
12 #include <asm/io.h>
13 #include <asm/arch/bootrom.h>
14 #include <asm/arch/clock.h>
15 #include <asm/arch/grf_rk3288.h>
16 #include <asm/arch/periph.h>
17 #include <asm/arch/pmu_rk3288.h>
18 #include <asm/arch/sys_proto.h>
19 #include <asm/arch/timer.h>
20 
21 #define GRF_BASE		0xff770000
22 void board_init_f(ulong dummy)
23 {
24 	struct udevice *dev;
25 	int ret;
26 
27 	/* Example code showing how to enable the debug UART on RK3288 */
28 	/* Enable early UART on the RK3288 */
29 	struct rk3288_grf * const grf = (void *)GRF_BASE;
30 
31 	rk_clrsetreg(&grf->gpio7ch_iomux, GPIO7C7_MASK << GPIO7C7_SHIFT |
32 		     GPIO7C6_MASK << GPIO7C6_SHIFT,
33 		     GPIO7C7_UART2DBG_SOUT << GPIO7C7_SHIFT |
34 		     GPIO7C6_UART2DBG_SIN << GPIO7C6_SHIFT);
35 	/*
36 	 * Debug UART can be used from here if required:
37 	 *
38 	 * debug_uart_init();
39 	 * printch('a');
40 	 * printhex8(0x1234);
41 	 * printascii("string");
42 	 */
43 	debug_uart_init();
44 
45 	ret = spl_early_init();
46 	if (ret) {
47 		debug("spl_early_init() failed: %d\n", ret);
48 		hang();
49 	}
50 
51 	rockchip_timer_init();
52 	configure_l2ctlr();
53 
54 	ret = rockchip_get_clk(&dev);
55 	if (ret) {
56 		debug("CLK init failed: %d\n", ret);
57 		return;
58 	}
59 
60 	ret = uclass_get_device(UCLASS_RAM, 0, &dev);
61 	if (ret) {
62 		debug("DRAM init failed: %d\n", ret);
63 		return;
64 	}
65 }
66 
67 void board_return_to_bootrom(void)
68 {
69 	back_to_bootrom(BROM_BOOT_NEXTSTAGE);
70 }
71 
72 u32 spl_boot_device(void)
73 {
74 	return BOOT_DEVICE_BOOTROM;
75 }
76 
77 void spl_board_init(void)
78 {
79 	puts("\nU-Boot TPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
80 				U_BOOT_TIME ")\n");
81 }
82