xref: /openbmc/u-boot/board/xilinx/zynq/board.c (revision 5396b2a9)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2012 Michal Simek <monstr@monstr.eu>
4  * (C) Copyright 2013 - 2018 Xilinx, Inc.
5  */
6 
7 #include <common.h>
8 #include <dm/uclass.h>
9 #include <fdtdec.h>
10 #include <fpga.h>
11 #include <malloc.h>
12 #include <mmc.h>
13 #include <watchdog.h>
14 #include <wdt.h>
15 #include <zynqpl.h>
16 #include <asm/arch/hardware.h>
17 #include <asm/arch/sys_proto.h>
18 
19 DECLARE_GLOBAL_DATA_PTR;
20 
21 #if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_WDT)
22 static struct udevice *watchdog_dev __attribute__((section(".data"))) = NULL;
23 #endif
24 
25 #if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_BOARD_EARLY_INIT_F)
26 int board_early_init_f(void)
27 {
28 	return 0;
29 }
30 #endif
31 
32 int board_init(void)
33 {
34 #if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_WDT)
35 	if (uclass_get_device_by_seq(UCLASS_WDT, 0, &watchdog_dev)) {
36 		debug("Watchdog: Not found by seq!\n");
37 		if (uclass_get_device(UCLASS_WDT, 0, &watchdog_dev)) {
38 			puts("Watchdog: Not found!\n");
39 			return 0;
40 		}
41 	}
42 
43 	wdt_start(watchdog_dev, 0, 0);
44 	puts("Watchdog: Started\n");
45 # endif
46 
47 	return 0;
48 }
49 
50 int board_late_init(void)
51 {
52 	int env_targets_len = 0;
53 	const char *mode;
54 	char *new_targets;
55 	char *env_targets;
56 
57 	switch ((zynq_slcr_get_boot_mode()) & ZYNQ_BM_MASK) {
58 	case ZYNQ_BM_QSPI:
59 		mode = "qspi";
60 		env_set("modeboot", "qspiboot");
61 		break;
62 	case ZYNQ_BM_NAND:
63 		mode = "nand";
64 		env_set("modeboot", "nandboot");
65 		break;
66 	case ZYNQ_BM_NOR:
67 		mode = "nor";
68 		env_set("modeboot", "norboot");
69 		break;
70 	case ZYNQ_BM_SD:
71 		mode = "mmc";
72 		env_set("modeboot", "sdboot");
73 		break;
74 	case ZYNQ_BM_JTAG:
75 		mode = "pxe dhcp";
76 		env_set("modeboot", "jtagboot");
77 		break;
78 	default:
79 		mode = "";
80 		env_set("modeboot", "");
81 		break;
82 	}
83 
84 	/*
85 	 * One terminating char + one byte for space between mode
86 	 * and default boot_targets
87 	 */
88 	env_targets = env_get("boot_targets");
89 	if (env_targets)
90 		env_targets_len = strlen(env_targets);
91 
92 	new_targets = calloc(1, strlen(mode) + env_targets_len + 2);
93 	if (!new_targets)
94 		return -ENOMEM;
95 
96 	sprintf(new_targets, "%s %s", mode,
97 		env_targets ? env_targets : "");
98 
99 	env_set("boot_targets", new_targets);
100 
101 	return 0;
102 }
103 
104 #if !defined(CONFIG_SYS_SDRAM_BASE) && !defined(CONFIG_SYS_SDRAM_SIZE)
105 int dram_init_banksize(void)
106 {
107 	return fdtdec_setup_memory_banksize();
108 }
109 
110 int dram_init(void)
111 {
112 	if (fdtdec_setup_mem_size_base() != 0)
113 		return -EINVAL;
114 
115 	zynq_ddrc_init();
116 
117 	return 0;
118 }
119 #else
120 int dram_init(void)
121 {
122 	gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
123 				    CONFIG_SYS_SDRAM_SIZE);
124 
125 	zynq_ddrc_init();
126 
127 	return 0;
128 }
129 #endif
130 
131 #if defined(CONFIG_WATCHDOG)
132 /* Called by macro WATCHDOG_RESET */
133 void watchdog_reset(void)
134 {
135 # if !defined(CONFIG_SPL_BUILD)
136 	static ulong next_reset;
137 	ulong now;
138 
139 	if (!watchdog_dev)
140 		return;
141 
142 	now = timer_get_us();
143 
144 	/* Do not reset the watchdog too often */
145 	if (now > next_reset) {
146 		wdt_reset(watchdog_dev);
147 		next_reset = now + 1000;
148 	}
149 # endif
150 }
151 #endif
152