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7a8e9bed WD |
1 | /* |
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> | |
7a8e9bed | 32 | |
7a8e9bed WD |
33 | /* Display values from last command. |
34 | * Memory modify remembered values are different from display memory. | |
35 | */ | |
36 | static uint in_last_addr, in_last_size; | |
37 | static uint out_last_addr, out_last_size, out_last_value; | |
38 | ||
39 | ||
54841ab5 | 40 | int do_portio_out (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) |
7a8e9bed WD |
41 | { |
42 | uint addr = out_last_addr; | |
43 | uint size = out_last_size; | |
44 | uint value = out_last_value; | |
45 | ||
46 | if (argc != 3) { | |
62c3ae7c | 47 | cmd_usage(cmdtp); |
7a8e9bed WD |
48 | return 1; |
49 | } | |
50 | ||
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. | |
54 | */ | |
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); | |
58 | } | |
59 | #if defined (CONFIG_X86) | |
60 | ||
61 | { | |
62 | unsigned short port = addr; | |
63 | ||
64 | switch (size) { | |
65 | default: | |
66 | case 1: | |
67 | { | |
68 | unsigned char ch = value; | |
69 | __asm__ volatile ("out %0, %%dx"::"a" (ch), "d" (port)); | |
70 | } | |
71 | break; | |
72 | case 2: | |
73 | { | |
74 | unsigned short w = value; | |
75 | __asm__ volatile ("out %0, %%dx"::"a" (w), "d" (port)); | |
76 | } | |
77 | break; | |
78 | case 4: | |
79 | __asm__ volatile ("out %0, %%dx"::"a" (value), "d" (port)); | |
80 | ||
81 | break; | |
82 | } | |
83 | } | |
84 | ||
85 | #endif /* CONFIG_X86 */ | |
86 | ||
87 | out_last_addr = addr; | |
88 | out_last_size = size; | |
89 | out_last_value = value; | |
90 | ||
91 | return 0; | |
92 | } | |
93 | ||
0d498393 WD |
94 | U_BOOT_CMD( |
95 | out, 3, 1, do_portio_out, | |
2fb2604d | 96 | "write datum to IO port", |
a89c33db | 97 | "[.b, .w, .l] port value\n - output to IO port" |
b0fce99b WD |
98 | ); |
99 | ||
54841ab5 | 100 | int do_portio_in (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) |
7a8e9bed WD |
101 | { |
102 | uint addr = in_last_addr; | |
103 | uint size = in_last_size; | |
104 | ||
105 | if (argc != 2) { | |
62c3ae7c | 106 | cmd_usage(cmdtp); |
7a8e9bed WD |
107 | return 1; |
108 | } | |
109 | ||
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. | |
113 | */ | |
114 | size = cmd_get_data_size (argv[0], 1); | |
115 | addr = simple_strtoul (argv[1], NULL, 16); | |
116 | } | |
117 | #if defined (CONFIG_X86) | |
118 | ||
119 | { | |
120 | unsigned short port = addr; | |
121 | ||
122 | switch (size) { | |
123 | default: | |
124 | case 1: | |
125 | { | |
126 | unsigned char ch; | |
127 | __asm__ volatile ("in %%dx, %0":"=a" (ch):"d" (port)); | |
128 | ||
129 | printf (" %02x\n", ch); | |
130 | } | |
131 | break; | |
132 | case 2: | |
133 | { | |
134 | unsigned short w; | |
135 | __asm__ volatile ("in %%dx, %0":"=a" (w):"d" (port)); | |
136 | ||
137 | printf (" %04x\n", w); | |
138 | } | |
139 | break; | |
140 | case 4: | |
141 | { | |
142 | unsigned long l; | |
143 | __asm__ volatile ("in %%dx, %0":"=a" (l):"d" (port)); | |
144 | ||
145 | printf (" %08lx\n", l); | |
146 | } | |
147 | break; | |
148 | } | |
149 | } | |
150 | #endif /* CONFIG_X86 */ | |
151 | ||
152 | in_last_addr = addr; | |
153 | in_last_size = size; | |
154 | ||
155 | return 0; | |
156 | } | |
157 | ||
0d498393 WD |
158 | U_BOOT_CMD( |
159 | in, 2, 1, do_portio_in, | |
2fb2604d | 160 | "read data from an IO port", |
b0fce99b | 161 | "[.b, .w, .l] port\n" |
a89c33db | 162 | " - read datum from IO port" |
b0fce99b | 163 | ); |