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