Eric Lee / smarc-uboot

Blame view

cmd/io.c 1.32 KB
edit raw normal view history
d41ce506b   Eric Lee   Initial Release, ... 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
 
  /*
   * Copyright (c) 2012 The Chromium OS Authors.
   *
   * SPDX-License-Identifier:     GPL-2.0+
   */
  
  /*
   * IO space access commands.
   */
  
  #include <common.h>
  #include <command.h>
  #include <asm/io.h>
  
  /*
   * IO Display
   *
   * Syntax:
   *	iod{.b, .w, .l} {addr}
   */
  int do_io_iod(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
  {
  	ulong addr;
  	int size;
  
  	if (argc != 2)
  		return CMD_RET_USAGE;
  
  	size = cmd_get_data_size(argv[0], 4);
  	if (size < 0)
  		return 1;
  
  	addr = simple_strtoul(argv[1], NULL, 16);
  
  	printf("%04x: ", (u16) addr);
  
  	if (size == 4)
  		printf("%08x
  ", inl(addr));
  	else if (size == 2)
  		printf("%04x
  ", inw(addr));
  	else
  		printf("%02x
  ", inb(addr));
  
  	return 0;
  }
  
  int do_io_iow(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
  {
  	ulong addr, val;
  	int size;
  
  	if (argc != 3)
  		return CMD_RET_USAGE;
  
  	size = cmd_get_data_size(argv[0], 4);
  	if (size < 0)
  		return 1;
  
  	addr = simple_strtoul(argv[1], NULL, 16);
  	val = simple_strtoul(argv[2], NULL, 16);
  
  	if (size == 4)
  		outl((u32) val, addr);
  	else if (size == 2)
  		outw((u16) val, addr);
  	else
  		outb((u8) val, addr);
  
  	return 0;
  }
  
  /**************************************************/
  U_BOOT_CMD(iod, 2, 0, do_io_iod,
  	   "IO space display", "[.b, .w, .l] address");
  
  U_BOOT_CMD(iow, 3, 0, do_io_iow,
  	   "IO space modify",
  	   "[.b, .w, .l] address value");