1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2007-2018 Michal Simek
4  *
5  * Michal SIMEK <monstr@monstr.eu>
6  */
7 
8 /*
9  * This is a board specific file.  It's OK to include board specific
10  * header files
11  */
12 
13 #include <common.h>
14 #include <config.h>
15 #include <dm.h>
16 #include <dm/lists.h>
17 #include <fdtdec.h>
18 #include <asm/processor.h>
19 #include <asm/microblaze_intc.h>
20 #include <asm/asm.h>
21 #include <asm/gpio.h>
22 #include <dm/uclass.h>
23 #include <wdt.h>
24 
25 DECLARE_GLOBAL_DATA_PTR;
26 
27 #if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_WDT)
28 static struct udevice *watchdog_dev;
29 #endif /* !CONFIG_SPL_BUILD && CONFIG_WDT */
30 
31 ulong ram_base;
32 
33 int dram_init_banksize(void)
34 {
35 	gd->bd->bi_dram[0].start = ram_base;
36 	gd->bd->bi_dram[0].size = get_effective_memsize();
37 
38 	return 0;
39 }
40 
41 int dram_init(void)
42 {
43 	int node;
44 	fdt_addr_t addr;
45 	fdt_size_t size;
46 	const void *blob = gd->fdt_blob;
47 
48 	node = fdt_node_offset_by_prop_value(blob, -1, "device_type",
49 					     "memory", 7);
50 	if (node == -FDT_ERR_NOTFOUND) {
51 		debug("DRAM: Can't get memory node\n");
52 		return 1;
53 	}
54 	addr = fdtdec_get_addr_size(blob, node, "reg", &size);
55 	if (addr == FDT_ADDR_T_NONE || size == 0) {
56 		debug("DRAM: Can't get base address or size\n");
57 		return 1;
58 	}
59 	ram_base = addr;
60 
61 	gd->ram_top = addr; /* In setup_dest_addr() is done +ram_size */
62 	gd->ram_size = size;
63 
64 	return 0;
65 };
66 
67 #ifdef CONFIG_WDT
68 /* Called by macro WATCHDOG_RESET */
69 void watchdog_reset(void)
70 {
71 #if !defined(CONFIG_SPL_BUILD)
72 	ulong now;
73 	static ulong next_reset;
74 
75 	if (!watchdog_dev)
76 		return;
77 
78 	now = timer_get_us();
79 
80 	/* Do not reset the watchdog too often */
81 	if (now > next_reset) {
82 		wdt_reset(watchdog_dev);
83 		next_reset = now + 1000;
84 	}
85 #endif /* !CONFIG_SPL_BUILD */
86 }
87 #endif /* CONFIG_WDT */
88 
89 int board_late_init(void)
90 {
91 #if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_WDT)
92 	watchdog_dev = NULL;
93 
94 	if (uclass_get_device_by_seq(UCLASS_WDT, 0, &watchdog_dev)) {
95 		debug("Watchdog: Not found by seq!\n");
96 		if (uclass_get_device(UCLASS_WDT, 0, &watchdog_dev)) {
97 			puts("Watchdog: Not found!\n");
98 			return 0;
99 		}
100 	}
101 
102 	wdt_start(watchdog_dev, 0, 0);
103 	puts("Watchdog: Started\n");
104 #endif /* !CONFIG_SPL_BUILD && CONFIG_WDT */
105 #if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_SYSRESET_MICROBLAZE)
106 	int ret;
107 
108 	ret = device_bind_driver(gd->dm_root, "mb_soft_reset",
109 				 "reset_soft", NULL);
110 	if (ret)
111 		printf("Warning: No reset driver: ret=%d\n", ret);
112 #endif
113 	return 0;
114 }
115