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