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 #if defined(CONFIG_CMD_PORTIO)
35 extern int cmd_get_data_size (char *arg, int default_size);
37 /* Display values from last command.
38 * Memory modify remembered values are different from display memory.
40 static uint in_last_addr, in_last_size;
41 static uint out_last_addr, out_last_size, out_last_value;
44 int do_portio_out (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
46 uint addr = out_last_addr;
47 uint size = out_last_size;
48 uint value = out_last_value;
51 printf ("Usage:\n%s\n", cmdtp->usage);
55 if ((flag & CMD_FLAG_REPEAT) == 0) {
56 /* New command specified. Check for a size specification.
57 * Defaults to long if no or incorrect specification.
59 size = cmd_get_data_size (argv[0], 1);
60 addr = simple_strtoul (argv[1], NULL, 16);
61 value = simple_strtoul (argv[2], NULL, 16);
63 #if defined (CONFIG_X86)
66 unsigned short port = addr;
72 unsigned char ch = value;
73 __asm__ volatile ("out %0, %%dx"::"a" (ch), "d" (port));
78 unsigned short w = value;
79 __asm__ volatile ("out %0, %%dx"::"a" (w), "d" (port));
83 __asm__ volatile ("out %0, %%dx"::"a" (value), "d" (port));
89 #endif /* CONFIG_X86 */
93 out_last_value = value;
99 out, 3, 1, do_portio_out,
100 "out - write datum to IO port\n",
101 "[.b, .w, .l] port value\n - output to IO port\n"
104 int do_portio_in (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
106 uint addr = in_last_addr;
107 uint size = in_last_size;
110 printf ("Usage:\n%s\n", cmdtp->usage);
114 if ((flag & CMD_FLAG_REPEAT) == 0) {
115 /* New command specified. Check for a size specification.
116 * Defaults to long if no or incorrect specification.
118 size = cmd_get_data_size (argv[0], 1);
119 addr = simple_strtoul (argv[1], NULL, 16);
121 #if defined (CONFIG_X86)
124 unsigned short port = addr;
131 __asm__ volatile ("in %%dx, %0":"=a" (ch):"d" (port));
133 printf (" %02x\n", ch);
139 __asm__ volatile ("in %%dx, %0":"=a" (w):"d" (port));
141 printf (" %04x\n", w);
147 __asm__ volatile ("in %%dx, %0":"=a" (l):"d" (port));
149 printf (" %08lx\n", l);
154 #endif /* CONFIG_X86 */
163 in, 2, 1, do_portio_in,
164 "in - read data from an IO port\n",
165 "[.b, .w, .l] port\n"
166 " - read datum from IO port\n"