1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2007 Michal Simek
4  *
5  * Michal  SIMEK <monstr@monstr.eu>
6  */
7 
8 /* This is a board specific file.  It's OK to include board specific
9  * header files */
10 
11 #include <common.h>
12 #include <config.h>
13 #include <fdtdec.h>
14 #include <asm/processor.h>
15 #include <asm/microblaze_intc.h>
16 #include <asm/asm.h>
17 #include <asm/gpio.h>
18 
19 DECLARE_GLOBAL_DATA_PTR;
20 
21 #ifdef CONFIG_XILINX_GPIO
22 static int reset_pin = -1;
23 #endif
24 
25 ulong ram_base;
26 
27 int dram_init_banksize(void)
28 {
29 	gd->bd->bi_dram[0].start = ram_base;
30 	gd->bd->bi_dram[0].size = get_effective_memsize();
31 
32 	return 0;
33 }
34 
35 int dram_init(void)
36 {
37 	int node;
38 	fdt_addr_t addr;
39 	fdt_size_t size;
40 	const void *blob = gd->fdt_blob;
41 
42 	node = fdt_node_offset_by_prop_value(blob, -1, "device_type",
43 					     "memory", 7);
44 	if (node == -FDT_ERR_NOTFOUND) {
45 		debug("DRAM: Can't get memory node\n");
46 		return 1;
47 	}
48 	addr = fdtdec_get_addr_size(blob, node, "reg", &size);
49 	if (addr == FDT_ADDR_T_NONE || size == 0) {
50 		debug("DRAM: Can't get base address or size\n");
51 		return 1;
52 	}
53 	ram_base = addr;
54 
55 	gd->ram_top = addr; /* In setup_dest_addr() is done +ram_size */
56 	gd->ram_size = size;
57 
58 	return 0;
59 };
60 
61 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
62 {
63 #ifndef CONFIG_SPL_BUILD
64 #ifdef CONFIG_XILINX_GPIO
65 	if (reset_pin != -1)
66 		gpio_direction_output(reset_pin, 1);
67 #endif
68 
69 #ifdef CONFIG_XILINX_TB_WATCHDOG
70 	hw_watchdog_disable();
71 #endif
72 #endif
73 	puts ("Reseting board\n");
74 	__asm__ __volatile__ ("	mts rmsr, r0;" \
75 				"bra r0");
76 
77 	return 0;
78 }
79 
80 static int gpio_init(void)
81 {
82 #ifdef CONFIG_XILINX_GPIO
83 	reset_pin = gpio_alloc(CONFIG_SYS_GPIO_0_ADDR, "reset", 1);
84 	if (reset_pin != -1)
85 		gpio_request(reset_pin, "reset_pin");
86 #endif
87 	return 0;
88 }
89 
90 int board_late_init(void)
91 {
92 	gpio_init();
93 
94 	return 0;
95 }
96