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 *argv[])
42 uint addr = out_last_addr;
43 uint size = out_last_size;
44 uint value = out_last_value;
51 if ((flag & CMD_FLAG_REPEAT) == 0) {
52 /* New command specified. Check for a size specification.
53 * Defaults to long if no or incorrect specification.
55 size = cmd_get_data_size (argv[0], 1);
56 addr = simple_strtoul (argv[1], NULL, 16);
57 value = simple_strtoul (argv[2], NULL, 16);
59 #if defined (CONFIG_X86)
62 unsigned short port = addr;
68 unsigned char ch = value;
69 __asm__ volatile ("out %0, %%dx"::"a" (ch), "d" (port));
74 unsigned short w = value;
75 __asm__ volatile ("out %0, %%dx"::"a" (w), "d" (port));
79 __asm__ volatile ("out %0, %%dx"::"a" (value), "d" (port));
85 #endif /* CONFIG_X86 */
89 out_last_value = value;
95 out, 3, 1, do_portio_out,
96 "write datum to IO port",
97 "[.b, .w, .l] port value\n - output to IO port\n"
100 int do_portio_in (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
102 uint addr = in_last_addr;
103 uint size = in_last_size;
110 if ((flag & CMD_FLAG_REPEAT) == 0) {
111 /* New command specified. Check for a size specification.
112 * Defaults to long if no or incorrect specification.
114 size = cmd_get_data_size (argv[0], 1);
115 addr = simple_strtoul (argv[1], NULL, 16);
117 #if defined (CONFIG_X86)
120 unsigned short port = addr;
127 __asm__ volatile ("in %%dx, %0":"=a" (ch):"d" (port));
129 printf (" %02x\n", ch);
135 __asm__ volatile ("in %%dx, %0":"=a" (w):"d" (port));
137 printf (" %04x\n", w);
143 __asm__ volatile ("in %%dx, %0":"=a" (l):"d" (port));
145 printf (" %08lx\n", l);
150 #endif /* CONFIG_X86 */
159 in, 2, 1, do_portio_in,
160 "read data from an IO port",
161 "[.b, .w, .l] port\n"
162 " - read datum from IO port\n"