summaryrefslogtreecommitdiff
path: root/arch/ppc/cpu/mpc512x/iim.c
blob: 8f2eb37e17e867eb0af560133b7fe0a54640abf7 (plain)
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
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
/*
 * Copyright 2008 Silicon Turnkey Express, Inc.
 * Martha Marx <mmarx@silicontkx.com>
 *
 * ADS5121 IIM (Fusebox) Interface
 *
 * 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
 */

#include <common.h>
#include <command.h>
#include <asm/io.h>

#ifdef CONFIG_CMD_FUSE

DECLARE_GLOBAL_DATA_PTR;

static char cur_bank = '1';

char *iim_err_msg(u32 err)
{
	static char *IIM_errs[] = {
		"Parity Error in cache",
		"Explicit Sense Cycle Error",
		"Write to Locked Register Error",
		"Read Protect Error",
		"Override Protect Error",
		"Write Protect Error"};

	int i;

	if (!err)
		return "";
	for (i = 1; i < 8; i++)
		if (err & (1 << i))
			printf("IIM - %s\n", IIM_errs[i-1]);
	return "";
}

int in_range(int n, int min, int max, char *err, char *usg)
{
	if (n > max || n < min) {
		printf(err);
		printf("Usage:\n%s\n", usg);
		return 0;
	}
	return 1;
}

int ads5121_fuse_read(int bank, int fstart, int num)
{
	iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim;
	u32 *iim_fb, dummy;
	int f, ctr;

	out_be32(&iim->err, in_be32(&iim->err));
	if (bank == 0)
		iim_fb = (u32 *)&(iim->fbac0);
	else
		iim_fb = (u32 *)&(iim->fbac1);
/* try a read to see if Read Protect is set */
	dummy = in_be32(&iim_fb[0]);
	if (in_be32(&iim->err) & IIM_ERR_RPE) {
		printf("\tRead protect fuse is set\n");
		out_be32(&iim->err, IIM_ERR_RPE);
		return 0;
	}
	printf("Reading Bank %d cache\n", bank);
	for (f = fstart, ctr = 0; num > 0; ctr++, num--, f++) {
		if (ctr % 4 == 0)
			printf("F%2d:", f);
		printf("\t%#04x", (u8)(iim_fb[f]));
		if (ctr % 4 == 3)
			printf("\n");
	}
	if (ctr % 4 != 0)
		printf("\n");
}

int ads5121_fuse_override(int bank, int f, u8 val)
{
	iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim;
	u32 *iim_fb;
	u32 iim_stat;
	int i;

	out_be32(&iim->err, in_be32(&iim->err));
	if (bank == 0)
		iim_fb = (u32 *)&(iim->fbac0);
	else
		iim_fb = (u32 *)&(iim->fbac1);
/* try a read to see if Read Protect is set */
	iim_stat = in_be32(&iim_fb[0]);
	if (in_be32(&iim->err) & IIM_ERR_RPE) {
		printf("Read protect fuse is set on bank %d;"
			"Override protect may also be set\n", bank);
		printf("An attempt will be made to override\n");
		out_be32(&iim->err, IIM_ERR_RPE);
	}
	if (iim_stat & IIM_FBAC_FBOP) {
		printf("Override protect fuse is set on bank %d\n", bank);
		return 1;
	}
	if (f > IIM_FMAX) /* reset the entire bank */
		for (i = 0; i < IIM_FMAX + 1; i++)
			out_be32(&iim_fb[i],  0);
	else
		out_be32(&iim_fb[f], val);
	return 0;
}

int ads5121_fuse_prog(cmd_tbl_t *cmdtp, int bank, char *fuseno_bitno)
{
	iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim;
	int f, i, bitno;
	u32 stat, err;

	f = simple_strtol(fuseno_bitno, NULL, 10);
	if (f == 0 && fuseno_bitno[0] != '0')
		f = -1;
	if (!in_range(f, 0, IIM_FMAX,
		"<frow> must be between 0-31\n\n", cmdtp->usage))
		return 1;
	bitno = -1;
	for (i = 0; i < 6; i++) {
		if (fuseno_bitno[i] == '_') {
			bitno = simple_strtol(&(fuseno_bitno[i+1]), NULL, 10);
			if (bitno == 0 && fuseno_bitno[i+1] != '0')
				bitno = -1;
			break;
		}
	}
	if (!in_range(bitno, 0, 7, "Bit number ranges from 0-7\n"
		"Example of <frow_bitno>: \"18_4\" sets bit 4 of row 18\n",
		cmdtp->usage))
		return 1;
	out_be32(&iim->err, in_be32(&iim->err));
	out_be32(&iim->prg_p, IIM_PRG_P_SET);
	out_be32(&iim->ua, IIM_SET_UA(bank, f));
	out_be32(&iim->la, IIM_SET_LA(f, bitno));
#ifdef DEBUG
	printf("Programming disabled with DEBUG defined \n");
	printf(""Set up to pro
	printf("iim.ua = %x; iim.la = %x\n", iim->ua, iim->la);
#else
	out_be32(&iim->fctl, IIM_FCTL_PROG_PULSE | IIM_FCTL_PROG);
	do
		udelay(20);
	while ((stat = in_be32(&iim->stat)) & IIM_STAT_BUSY);
	out_be32(&iim->prg_p, 0);
	err = in_be32(&iim->err);
	if (stat & IIM_STAT_PRGD) {
		if (!(err & (IIM_ERR_WPE | IIM_ERR_WPE))) {
			printf("Fuse is successfully set");
			if (err)
				printf(" - however there are other errors");
			printf("\n");
		}
		iim->stat = 0;
	}
	if (err) {
		iim_err_msg(err);
		out_be32(&iim->err, in_be32(&iim->err));
	}
#endif
}

int ads5121_fuse_sense(int bank, int fstart, int num)
{
	iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim;
	u32 iim_fbac;
	u32 stat, err, err_hold = 0;
	int f, ctr;

	out_be32(&iim->err, in_be32(&iim->err));
	if (bank == 0)
		iim_fbac = in_be32(&iim->fbac0);
	else
		iim_fbac = in_be32(&iim->fbac1);
	if (iim_fbac & IIM_FBAC_FBESP) {
		printf("\tSense Protect disallows this operation\n");
		out_be32(&iim->err, IIM_FBAC_FBESP);
		return 1;
	}
	err = in_be32(&iim->err);
	if (err) {
		iim_err_msg(err);
		err_hold |= err;
	}
	if (err & IIM_ERR_RPE)
		printf("\tRead protect fuse is set; "
			"Sense Protect may be set but will be attempted\n");
	if (err)
		out_be32(&iim->err, err);
	printf("Sensing fuse(s) on Bank %d\n", bank);
	for (f = fstart, ctr = 0; num > 0; ctr++, f++, num--) {
		out_be32(&iim->ua, IIM_SET_UA(bank, f));
		out_be32(&iim->la, IIM_SET_LA(f, 0));
		out_be32(&iim->fctl,  IIM_FCTL_ESNS_N);
		do
			udelay(20);
		while ((stat = in_be32(&iim->stat)) & IIM_STAT_BUSY);
		err = in_be32(&iim->err);
		if (err & IIM_ERR_SNSE) {
			iim_err_msg(err);
			out_be32(&iim->err, IIM_ERR_SNSE);
			return 1;
		}
		if (stat & IIM_STAT_SNSD) {
			out_be32(&iim->stat, 0);
			if (ctr % 4 == 0)
				printf("F%2d:", f);
			printf("\t%#04x", (u8)iim->sdat);
			if (ctr % 4 == 3)
				printf("\n");
		}
		if (err) {
			err_hold |= err;
			out_be32(&iim->err, err);
		}
	}
	if (ctr % 4 != 0)
		printf("\n");
	if (err_hold)
		iim_err_msg(err_hold);

	return 0;
}

int ads5121_fuse_stat(int bank)
{
	iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim;
	u32 iim_fbac;
	u32 err;

	out_be32(&iim->err, in_be32(&iim->err));
	if (bank == 0)
		iim_fbac = in_be32(&iim->fbac0);
	else
		iim_fbac = in_be32(&iim->fbac1);
	err = in_be32(&iim->err);
	if (err)
		iim_err_msg(err);
	if (err & IIM_ERR_RPE  || iim_fbac & IIM_FBAC_FBRP) {
		if (iim_fbac == 0)
			printf("Since protection settings can't be read - "
				"try sensing fuse row 0;\n");
		return 0;
	}
	if (iim_fbac & IIM_PROTECTION)
		printf("Protection Fuses Bank %d = %#04x:\n", bank, iim_fbac);
	else if (!(err & IIM_ERR_RPE))
		printf("No Protection fuses are set\n");
	if (iim_fbac & IIM_FBAC_FBWP)
		printf("\tWrite Protect fuse is set\n");
	if (iim_fbac & IIM_FBAC_FBOP)
		printf("\tOverride Protect fuse is set\n");
	if (iim_fbac & IIM_FBAC_FBESP)
		printf("\tSense Protect Fuse is set\n");
	out_be32(&iim->err, in_be32(&iim->err));

	return 0;
}

int do_ads5121_fuse(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	int frow, n, v, bank;

	if (cur_bank == '0')
		bank = 0;
	else
		bank = 1;

	switch (argc) {
	case 0:
	case 1:
		printf("Usage:\n%s\n", cmdtp->usage);
		return 1;
	case 2:
		if (strncmp(argv[1], "stat", 4) == 0)
			return ads5121_fuse_stat(bank);
		if (strncmp(argv[1], "read", 4) == 0)
			return ads5121_fuse_read(bank, 0, IIM_FMAX + 1);
		if (strncmp(argv[1], "sense", 5) == 0)
			return ads5121_fuse_sense(bank, 0, IIM_FMAX + 1);
		if (strncmp(argv[1], "ovride", 6) == 0)
			return ads5121_fuse_override(bank, IIM_FMAX + 1, 0);
		if (strncmp(argv[1], "bank", 4) == 0) {
			printf("Active Fuse Bank is %c\n", cur_bank);
			return 0;
		}
		printf("Usage:\n%s\n", cmdtp->usage);
		return 1;
	case 3:
		if (strncmp(argv[1], "bank", 4) == 0) {
			if (argv[2][0] == '0')
				cur_bank = '0';
			else if (argv[2][0] == '1')
				cur_bank = '1';
			else {
				printf("Usage:\n%s\n", cmdtp->usage);
				return 1;
			}

			printf("Setting Active Fuse Bank to %c\n", cur_bank);
			return 0;
		}
		if (strncmp(argv[1], "prog", 4) == 0)
			return ads5121_fuse_prog(cmdtp, bank, argv[2]);

		frow = (int)simple_strtol(argv[2], NULL, 10);
		if (frow == 0 && argv[2][0] != '0')
			frow = -1;
		if (!in_range(frow, 0, IIM_FMAX,
			"<frow> must be between 0-31\n\n", cmdtp->usage))
			return 1;
		if (strncmp(argv[1], "read", 4) == 0)
			return ads5121_fuse_read(bank, frow, 1);
		if (strncmp(argv[1], "ovride", 6) == 0)
			return ads5121_fuse_override(bank, frow, 0);
		if (strncmp(argv[1], "sense", 5) == 0)
			return ads5121_fuse_sense(bank, frow, 1);
		printf("Usage:\n%s\n", cmdtp->usage);
		return 1;
	case 4:
		frow = (int)simple_strtol(argv[2], NULL, 10);
		if (frow == 0 && argv[2][0] != '0')
			frow = -1;
		if (!in_range(frow, 0, IIM_FMAX,
			"<frow> must be between 0-31\n\n", cmdtp->usage))
			return 1;
		if (strncmp(argv[1], "read", 4) == 0) {
			n = (int)simple_strtol(argv[3], NULL, 10);
			if (!in_range(frow + n, frow + 1, IIM_FMAX + 1,
				"<frow>+<n> must be between 1-32\n\n",
				cmdtp->usage))
				return 1;
			return ads5121_fuse_read(bank, frow, n);
		}
		if (strncmp(argv[1], "ovride", 6) == 0) {
			v = (int)simple_strtol(argv[3], NULL, 10);
			return ads5121_fuse_override(bank, frow, v);
		}
		if (strncmp(argv[1], "sense", 5) == 0) {
			n = (int)simple_strtol(argv[3], NULL, 10);
			if (!in_range(frow + n, frow + 1, IIM_FMAX + 1,
				"<frow>+<n> must be between 1-32\n\n",
				cmdtp->usage))
				return 1;
			return ads5121_fuse_sense(bank, frow, n);
		}
		printf("Usage:\n%s\n", cmdtp->usage);
		return 1;
	default: /* at least 5 args */
		printf("Usage:\n%s\n", cmdtp->usage);
		return 1;
	}
}

U_BOOT_CMD(
	fuse, CONFIG_SYS_MAXARGS, 0, do_ads5121_fuse,
	"   - Read, Sense, Override or Program Fuses\n",
	"bank <n>		- sets active Fuse Bank to 0 or 1\n"
	"			    no args shows current active bank\n"
	"fuse stat		- print active fuse bank's protection status\n"
	"fuse read [<frow> [<n>]] - print <n> fuse rows starting at <frow>\n"
	"			    no args to print entire bank's fuses\n"
	"fuse ovride [<frow> [<v>]]- override fuses at <frow> with <v>\n"
	"			    no <v> defaults to 0 for the row\n"
	"			    no args resets entire bank to 0\n"
	"			  NOTE - settings persist until hard reset\n"
	"fuse sense [<frow>]	- senses current fuse at <frow>\n"
	"			    no args for entire bank\n"
	"fuse prog <frow_bit> 	- program fuse at row <frow>, bit <_bit>\n"
	"			    <frow> is 0-31, <bit> is 0-7; eg. 13_2 \n"
	"			  WARNING - this is permanent"
);
#endif /* CONFIG_CMD_FUSE */