3 * Marc Singer, elf@buici.com
5 * See file CREDITS for list of people who contributed to this
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.
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.
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,
27 * Copied from FADS ROM, Dan Malek (dmalek@jlc.net)
33 /* Display values from last command.
34 * Memory modify remembered values are different from display memory.
36 static uint in_last_addr, in_last_size;
37 static uint out_last_addr, out_last_size, out_last_value;
40 int do_portio_out (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
42 uint addr = out_last_addr;
43 uint size = out_last_size;
44 uint value = out_last_value;
47 return cmd_usage(cmdtp);
49 if ((flag & CMD_FLAG_REPEAT) == 0) {
51 * New command specified. Check for a size specification.
52 * Defaults to long if no or incorrect specification.
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);
58 #if defined (CONFIG_X86)
61 unsigned short port = addr;
67 unsigned char ch = value;
68 __asm__ volatile ("out %0, %%dx"::"a" (ch), "d" (port));
73 unsigned short w = value;
74 __asm__ volatile ("out %0, %%dx"::"a" (w), "d" (port));
78 __asm__ volatile ("out %0, %%dx"::"a" (value), "d" (port));
84 #endif /* CONFIG_X86 */
88 out_last_value = value;
94 out, 3, 1, do_portio_out,
95 "write datum to IO port",
96 "[.b, .w, .l] port value\n - output to IO port"
99 int do_portio_in (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
101 uint addr = in_last_addr;
102 uint size = in_last_size;
105 return cmd_usage(cmdtp);
107 if ((flag & CMD_FLAG_REPEAT) == 0) {
109 * New command specified. Check for a size specification.
110 * Defaults to long if no or incorrect specification.
112 size = cmd_get_data_size (argv[0], 1);
113 addr = simple_strtoul (argv[1], NULL, 16);
115 #if defined (CONFIG_X86)
118 unsigned short port = addr;
125 __asm__ volatile ("in %%dx, %0":"=a" (ch):"d" (port));
127 printf (" %02x\n", ch);
133 __asm__ volatile ("in %%dx, %0":"=a" (w):"d" (port));
135 printf (" %04x\n", w);
141 __asm__ volatile ("in %%dx, %0":"=a" (l):"d" (port));
143 printf (" %08lx\n", l);
148 #endif /* CONFIG_X86 */
157 in, 2, 1, do_portio_in,
158 "read data from an IO port",
159 "[.b, .w, .l] port\n"
160 " - read datum from IO port"