blob: 4f2f4997b27b98d69ca5b3a58d6cbf578ce0512b [file] [log] [blame]
wdenk7a8e9bed2003-05-31 18:35:21 +00001/*
2 * (C) Copyright 2003
3 * Marc Singer, elf@buici.com
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24/*
25 * Port I/O Functions
26 *
27 * Copied from FADS ROM, Dan Malek (dmalek@jlc.net)
28 */
29
30#include <common.h>
31#include <command.h>
wdenk7a8e9bed2003-05-31 18:35:21 +000032
wdenk7a8e9bed2003-05-31 18:35:21 +000033/* Display values from last command.
34 * Memory modify remembered values are different from display memory.
35 */
36static uint in_last_addr, in_last_size;
37static uint out_last_addr, out_last_size, out_last_value;
38
39
Wolfgang Denk54841ab2010-06-28 22:00:46 +020040int do_portio_out (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
wdenk7a8e9bed2003-05-31 18:35:21 +000041{
42 uint addr = out_last_addr;
43 uint size = out_last_size;
44 uint value = out_last_value;
45
Wolfgang Denk47e26b12010-07-17 01:06:04 +020046 if (argc != 3)
47 return cmd_usage(cmdtp);
wdenk7a8e9bed2003-05-31 18:35:21 +000048
49 if ((flag & CMD_FLAG_REPEAT) == 0) {
Wolfgang Denk47e26b12010-07-17 01:06:04 +020050 /*
51 * New command specified. Check for a size specification.
wdenk7a8e9bed2003-05-31 18:35:21 +000052 * Defaults to long if no or incorrect specification.
53 */
54 size = cmd_get_data_size (argv[0], 1);
55 addr = simple_strtoul (argv[1], NULL, 16);
56 value = simple_strtoul (argv[2], NULL, 16);
57 }
58#if defined (CONFIG_X86)
59
60 {
61 unsigned short port = addr;
62
63 switch (size) {
64 default:
65 case 1:
66 {
67 unsigned char ch = value;
68 __asm__ volatile ("out %0, %%dx"::"a" (ch), "d" (port));
69 }
70 break;
71 case 2:
72 {
73 unsigned short w = value;
74 __asm__ volatile ("out %0, %%dx"::"a" (w), "d" (port));
75 }
76 break;
77 case 4:
78 __asm__ volatile ("out %0, %%dx"::"a" (value), "d" (port));
79
80 break;
81 }
82 }
83
84#endif /* CONFIG_X86 */
85
86 out_last_addr = addr;
87 out_last_size = size;
88 out_last_value = value;
89
90 return 0;
91}
92
wdenk0d498392003-07-01 21:06:45 +000093U_BOOT_CMD(
94 out, 3, 1, do_portio_out,
Peter Tyser2fb26042009-01-27 18:03:12 -060095 "write datum to IO port",
Wolfgang Denka89c33d2009-05-24 17:06:54 +020096 "[.b, .w, .l] port value\n - output to IO port"
wdenkb0fce992003-06-29 21:03:46 +000097);
98
Wolfgang Denk54841ab2010-06-28 22:00:46 +020099int do_portio_in (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
wdenk7a8e9bed2003-05-31 18:35:21 +0000100{
101 uint addr = in_last_addr;
102 uint size = in_last_size;
103
Wolfgang Denk47e26b12010-07-17 01:06:04 +0200104 if (argc != 2)
105 return cmd_usage(cmdtp);
wdenk7a8e9bed2003-05-31 18:35:21 +0000106
107 if ((flag & CMD_FLAG_REPEAT) == 0) {
Wolfgang Denk47e26b12010-07-17 01:06:04 +0200108 /*
109 * New command specified. Check for a size specification.
wdenk7a8e9bed2003-05-31 18:35:21 +0000110 * Defaults to long if no or incorrect specification.
111 */
112 size = cmd_get_data_size (argv[0], 1);
113 addr = simple_strtoul (argv[1], NULL, 16);
114 }
115#if defined (CONFIG_X86)
116
117 {
118 unsigned short port = addr;
119
120 switch (size) {
121 default:
122 case 1:
123 {
124 unsigned char ch;
125 __asm__ volatile ("in %%dx, %0":"=a" (ch):"d" (port));
126
127 printf (" %02x\n", ch);
128 }
129 break;
130 case 2:
131 {
132 unsigned short w;
133 __asm__ volatile ("in %%dx, %0":"=a" (w):"d" (port));
134
135 printf (" %04x\n", w);
136 }
137 break;
138 case 4:
139 {
140 unsigned long l;
141 __asm__ volatile ("in %%dx, %0":"=a" (l):"d" (port));
142
143 printf (" %08lx\n", l);
144 }
145 break;
146 }
147 }
148#endif /* CONFIG_X86 */
149
150 in_last_addr = addr;
151 in_last_size = size;
152
153 return 0;
154}
155
wdenk0d498392003-07-01 21:06:45 +0000156U_BOOT_CMD(
157 in, 2, 1, do_portio_in,
Peter Tyser2fb26042009-01-27 18:03:12 -0600158 "read data from an IO port",
wdenkb0fce992003-06-29 21:03:46 +0000159 "[.b, .w, .l] port\n"
Wolfgang Denka89c33d2009-05-24 17:06:54 +0200160 " - read datum from IO port"
wdenkb0fce992003-06-29 21:03:46 +0000161);