1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
/*
* (C) Copyright 2001
* Erik Theisen, Wave 7 Optics, etheisen@mindspring.com.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/*
* AMCC 4XX DCR Functions
*/
#include <common.h>
#include <config.h>
#include <command.h>
unsigned long get_dcr (unsigned short);
unsigned long set_dcr (unsigned short, unsigned long);
/* =======================================================================
* Interpreter command to retrieve an AMCC PPC 4xx Device Control Register
* =======================================================================
*/
int do_getdcr ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[] )
{
unsigned short dcrn; /* Device Control Register Num */
unsigned long value; /* DCR's value */
unsigned long get_dcr (unsigned short);
/* Validate arguments */
if (argc < 2) {
cmd_usage(cmdtp);
return 1;
}
/* Get a DCR */
dcrn = (unsigned short) simple_strtoul (argv[1], NULL, 16);
value = get_dcr (dcrn);
printf ("%04x: %08lx\n", dcrn, value);
return 0;
}
/* ======================================================================
* Interpreter command to set an AMCC PPC 4xx Device Control Register
* ======================================================================
*/
int do_setdcr (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
unsigned short dcrn; /* Device Control Register Num */
unsigned long value;
/* DCR's value */
int nbytes;
extern char console_buffer[];
/* Validate arguments */
if (argc < 2) {
cmd_usage(cmdtp);
return 1;
}
/* Set a DCR */
dcrn = (unsigned short) simple_strtoul (argv[1], NULL, 16);
do {
value = get_dcr (dcrn);
printf ("%04x: %08lx", dcrn, value);
nbytes = readline (" ? ");
if (nbytes == 0) {
/*
* <CR> pressed as only input, don't modify current
* location and exit command.
*/
nbytes = 1;
return 0;
} else {
unsigned long i;
char *endp;
i = simple_strtoul (console_buffer, &endp, 16);
nbytes = endp - console_buffer;
if (nbytes)
set_dcr (dcrn, i);
}
} while (nbytes);
return 0;
}
/* =======================================================================
* Interpreter command to retrieve an register value through AMCC PPC 4xx
* Device Control Register inderect addressing.
* =======================================================================
*/
int do_getidcr (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
unsigned short adr_dcrn; /* Device Control Register Num for Address */
unsigned short dat_dcrn; /* Device Control Register Num for Data */
unsigned short offset; /* Register's offset */
unsigned long value; /* Register's value */
char *ptr = NULL;
char buf[80];
/* Validate arguments */
if (argc < 3) {
cmd_usage(cmdtp);
return 1;
}
/* Find out whether ther is '.' (dot) symbol in the first parameter. */
strncpy (buf, argv[1], sizeof(buf)-1);
buf[sizeof(buf)-1] = 0; /* will guarantee zero-end string */
ptr = strchr (buf, '.');
if (ptr != NULL) {
/* First parameter has format adr_dcrn.dat_dcrn */
*ptr++ = 0; /* erase '.', create zero-end string */
adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
dat_dcrn = (unsigned short) simple_strtoul (ptr, NULL, 16);
} else {
/*
* First parameter has format adr_dcrn; dat_dcrn will be
* calculated as adr_dcrn+1.
*/
adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
dat_dcrn = adr_dcrn+1;
}
/* Register's offset */
offset = (unsigned short) simple_strtoul (argv[2], NULL, 16);
/* Disable interrupts */
disable_interrupts ();
/* Set offset */
set_dcr (adr_dcrn, offset);
/* get data */
value = get_dcr (dat_dcrn);
/* Enable interrupts */
enable_interrupts ();
printf ("%04x.%04x-%04x Read %08lx\n", adr_dcrn, dat_dcrn, offset, value);
return 0;
}
/* =======================================================================
* Interpreter command to update an register value through AMCC PPC 4xx
* Device Control Register inderect addressing.
* =======================================================================
*/
int do_setidcr (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
unsigned short adr_dcrn; /* Device Control Register Num for Address */
unsigned short dat_dcrn; /* Device Control Register Num for Data */
unsigned short offset; /* Register's offset */
unsigned long value; /* Register's value */
char *ptr = NULL;
char buf[80];
/* Validate arguments */
if (argc < 4) {
cmd_usage(cmdtp);
return 1;
}
/* Find out whether ther is '.' (dot) symbol in the first parameter. */
strncpy (buf, argv[1], sizeof(buf)-1);
buf[sizeof(buf)-1] = 0; /* will guarantee zero-end string */
ptr = strchr (buf, '.');
if (ptr != NULL) {
/* First parameter has format adr_dcrn.dat_dcrn */
*ptr++ = 0; /* erase '.', create zero-end string */
adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
dat_dcrn = (unsigned short) simple_strtoul (ptr, NULL, 16);
} else {
/*
* First parameter has format adr_dcrn; dat_dcrn will be
* calculated as adr_dcrn+1.
*/
adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
dat_dcrn = adr_dcrn+1;
}
/* Register's offset */
offset = (unsigned short) simple_strtoul (argv[2], NULL, 16);
/* New value */
value = (unsigned long) simple_strtoul (argv[3], NULL, 16);
/* Disable interrupts */
disable_interrupts ();
/* Set offset */
set_dcr (adr_dcrn, offset);
/* set data */
set_dcr (dat_dcrn, value);
/* Enable interrupts */
enable_interrupts ();
printf ("%04x.%04x-%04x Write %08lx\n", adr_dcrn, dat_dcrn, offset, value);
return 0;
}
/***************************************************/
U_BOOT_CMD(
getdcr, 2, 1, do_getdcr,
"Get an AMCC PPC 4xx DCR's value",
"dcrn - return a DCR's value."
);
U_BOOT_CMD(
setdcr, 2, 1, do_setdcr,
"Set an AMCC PPC 4xx DCR's value",
"dcrn - set a DCR's value."
);
U_BOOT_CMD(
getidcr, 3, 1, do_getidcr,
"Get a register value via indirect DCR addressing",
"adr_dcrn[.dat_dcrn] offset - write offset to adr_dcrn, read value from dat_dcrn."
);
U_BOOT_CMD(
setidcr, 4, 1, do_setidcr,
"Set a register value via indirect DCR addressing",
"adr_dcrn[.dat_dcrn] offset value - write offset to adr_dcrn, write value to dat_dcrn."
);
|
