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  • Committer: Bazaar Package Importer
  • Author(s): Oliver Grawert
  • Date: 2010-03-22 15:06:23 UTC
  • Revision ID: james.westby@ubuntu.com-20100322150623-i21g8rgiyl5dohag
Tags: upstream-2010.3git20100315
Import upstream version 2010.3git20100315

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board/netphone/flash.c
 
1
/*
 
2
 * (C) Copyright 2000-2004
 
3
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 
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
#include <common.h>
 
25
#include <mpc8xx.h>
 
26
 
 
27
flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];    /* info for FLASH chips    */
 
28
 
 
29
/*-----------------------------------------------------------------------
 
30
 * Functions
 
31
 */
 
32
static ulong flash_get_size(vu_long * addr, flash_info_t * info);
 
33
static int write_byte(flash_info_t * info, ulong dest, uchar data);
 
34
static void flash_get_offsets(ulong base, flash_info_t * info);
 
35
 
 
36
/*-----------------------------------------------------------------------
 
37
 */
 
38
 
 
39
unsigned long flash_init(void)
 
40
{
 
41
        volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
 
42
        volatile memctl8xx_t *memctl = &immap->im_memctl;
 
43
        unsigned long size;
 
44
#if CONFIG_NETPHONE_VERSION == 2
 
45
        unsigned long size1;
 
46
#endif
 
47
        int i;
 
48
 
 
49
        /* Init: no FLASHes known */
 
50
        for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
 
51
                flash_info[i].flash_id = FLASH_UNKNOWN;
 
52
 
 
53
        size = flash_get_size((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]);
 
54
 
 
55
        if (flash_info[0].flash_id == FLASH_UNKNOWN) {
 
56
                printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
 
57
                        size, size << 20);
 
58
        }
 
59
 
 
60
        /* Remap FLASH according to real size */
 
61
        memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size & 0xFFFF8000);
 
62
        memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | (memctl->memc_br0 & ~(BR_BA_MSK));
 
63
 
 
64
        /* Re-do sizing to get full correct info */
 
65
        size = flash_get_size((vu_long *) CONFIG_SYS_FLASH_BASE, &flash_info[0]);
 
66
 
 
67
        flash_get_offsets(CONFIG_SYS_FLASH_BASE, &flash_info[0]);
 
68
 
 
69
        /* monitor protection ON by default */
 
70
        flash_protect(FLAG_PROTECT_SET,
 
71
                        CONFIG_SYS_FLASH_BASE, CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
 
72
                        &flash_info[0]);
 
73
 
 
74
        flash_protect ( FLAG_PROTECT_SET,
 
75
                        CONFIG_ENV_ADDR,
 
76
                        CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
 
77
                        &flash_info[0]);
 
78
 
 
79
#ifdef CONFIG_ENV_ADDR_REDUND
 
80
        flash_protect ( FLAG_PROTECT_SET,
 
81
                        CONFIG_ENV_ADDR_REDUND,
 
82
                        CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
 
83
                        &flash_info[0]);
 
84
#endif
 
85
 
 
86
        flash_info[0].size = size;
 
87
 
 
88
#if CONFIG_NETPHONE_VERSION == 2
 
89
        size1 = flash_get_size((vu_long *) FLASH_BASE4_PRELIM, &flash_info[1]);
 
90
        if (size1 > 0) {
 
91
                if (flash_info[1].flash_id == FLASH_UNKNOWN)
 
92
                        printf("## Unknown FLASH on Bank 1 - Size = 0x%08lx = %ld MB\n", size1, size1 << 20);
 
93
 
 
94
                /* Remap FLASH according to real size */
 
95
                memctl->memc_or4 = CONFIG_SYS_OR_TIMING_FLASH | (-size1 & 0xFFFF8000);
 
96
                memctl->memc_br4 = (CONFIG_SYS_FLASH_BASE4 & BR_BA_MSK) | (memctl->memc_br4 & ~(BR_BA_MSK));
 
97
 
 
98
                /* Re-do sizing to get full correct info */
 
99
                size1 = flash_get_size((vu_long *) CONFIG_SYS_FLASH_BASE4, &flash_info[1]);
 
100
 
 
101
                flash_get_offsets(CONFIG_SYS_FLASH_BASE4, &flash_info[1]);
 
102
 
 
103
                size += size1;
 
104
        } else
 
105
                memctl->memc_br4 &= ~BR_V;
 
106
#endif
 
107
 
 
108
        return (size);
 
109
}
 
110
 
 
111
/*-----------------------------------------------------------------------
 
112
 */
 
113
static void flash_get_offsets(ulong base, flash_info_t * info)
 
114
{
 
115
        int i;
 
116
 
 
117
        /* set up sector start address table */
 
118
        if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
 
119
                for (i = 0; i < info->sector_count; i++) {
 
120
                        info->start[i] = base + (i * 0x00010000);
 
121
                }
 
122
        } else if (info->flash_id & FLASH_BTYPE) {
 
123
                /* set sector offsets for bottom boot block type    */
 
124
                info->start[0] = base + 0x00000000;
 
125
                info->start[1] = base + 0x00004000;
 
126
                info->start[2] = base + 0x00006000;
 
127
                info->start[3] = base + 0x00008000;
 
128
                for (i = 4; i < info->sector_count; i++) {
 
129
                        info->start[i] = base + (i * 0x00010000) - 0x00030000;
 
130
                }
 
131
        } else {
 
132
                /* set sector offsets for top boot block type       */
 
133
                i = info->sector_count - 1;
 
134
                info->start[i--] = base + info->size - 0x00004000;
 
135
                info->start[i--] = base + info->size - 0x00006000;
 
136
                info->start[i--] = base + info->size - 0x00008000;
 
137
                for (; i >= 0; i--) {
 
138
                        info->start[i] = base + i * 0x00010000;
 
139
                }
 
140
        }
 
141
}
 
142
 
 
143
/*-----------------------------------------------------------------------
 
144
 */
 
145
void flash_print_info(flash_info_t * info)
 
146
{
 
147
        int i;
 
148
 
 
149
        if (info->flash_id == FLASH_UNKNOWN) {
 
150
                printf("missing or unknown FLASH type\n");
 
151
                return;
 
152
        }
 
153
 
 
154
        switch (info->flash_id & FLASH_VENDMASK) {
 
155
        case FLASH_MAN_AMD:
 
156
                printf("AMD ");
 
157
                break;
 
158
        case FLASH_MAN_FUJ:
 
159
                printf("FUJITSU ");
 
160
                break;
 
161
        case FLASH_MAN_MX:
 
162
                printf("MXIC ");
 
163
                break;
 
164
        default:
 
165
                printf("Unknown Vendor ");
 
166
                break;
 
167
        }
 
168
 
 
169
        switch (info->flash_id & FLASH_TYPEMASK) {
 
170
        case FLASH_AM040:
 
171
                printf("AM29LV040B (4 Mbit, bottom boot sect)\n");
 
172
                break;
 
173
        case FLASH_AM400B:
 
174
                printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
 
175
                break;
 
176
        case FLASH_AM400T:
 
177
                printf("AM29LV400T (4 Mbit, top boot sector)\n");
 
178
                break;
 
179
        case FLASH_AM800B:
 
180
                printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
 
181
                break;
 
182
        case FLASH_AM800T:
 
183
                printf("AM29LV800T (8 Mbit, top boot sector)\n");
 
184
                break;
 
185
        case FLASH_AM160B:
 
186
                printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
 
187
                break;
 
188
        case FLASH_AM160T:
 
189
                printf("AM29LV160T (16 Mbit, top boot sector)\n");
 
190
                break;
 
191
        case FLASH_AM320B:
 
192
                printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
 
193
                break;
 
194
        case FLASH_AM320T:
 
195
                printf("AM29LV320T (32 Mbit, top boot sector)\n");
 
196
                break;
 
197
        default:
 
198
                printf("Unknown Chip Type\n");
 
199
                break;
 
200
        }
 
201
 
 
202
        printf("  Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);
 
203
 
 
204
        printf("  Sector Start Addresses:");
 
205
        for (i = 0; i < info->sector_count; ++i) {
 
206
                if ((i % 5) == 0)
 
207
                        printf("\n   ");
 
208
                printf(" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : "     ");
 
209
        }
 
210
        printf("\n");
 
211
}
 
212
 
 
213
/*-----------------------------------------------------------------------
 
214
 */
 
215
 
 
216
 
 
217
/*-----------------------------------------------------------------------
 
218
 */
 
219
 
 
220
/*
 
221
 * The following code cannot be run from FLASH!
 
222
 */
 
223
 
 
224
static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 
225
{
 
226
        short i;
 
227
        uchar mid;
 
228
        uchar pid;
 
229
        vu_char *caddr = (vu_char *) addr;
 
230
        ulong base = (ulong) addr;
 
231
 
 
232
        /* Write auto select command: read Manufacturer ID */
 
233
        caddr[0x0555] = 0xAA;
 
234
        caddr[0x02AA] = 0x55;
 
235
        caddr[0x0555] = 0x90;
 
236
 
 
237
        mid = caddr[0];
 
238
        switch (mid) {
 
239
        case (AMD_MANUFACT & 0xFF):
 
240
                info->flash_id = FLASH_MAN_AMD;
 
241
                break;
 
242
        case (FUJ_MANUFACT & 0xFF):
 
243
                info->flash_id = FLASH_MAN_FUJ;
 
244
                break;
 
245
        case (MX_MANUFACT & 0xFF):
 
246
                info->flash_id = FLASH_MAN_MX;
 
247
                break;
 
248
        case (STM_MANUFACT & 0xFF):
 
249
                info->flash_id = FLASH_MAN_STM;
 
250
                break;
 
251
        default:
 
252
                info->flash_id = FLASH_UNKNOWN;
 
253
                info->sector_count = 0;
 
254
                info->size = 0;
 
255
                return (0);                             /* no or unknown flash  */
 
256
        }
 
257
 
 
258
        pid = caddr[1];                         /* device ID        */
 
259
        switch (pid) {
 
260
        case (AMD_ID_LV400T & 0xFF):
 
261
                info->flash_id += FLASH_AM400T;
 
262
                info->sector_count = 11;
 
263
                info->size = 0x00080000;
 
264
                break;                                  /* => 512 kB        */
 
265
 
 
266
        case (AMD_ID_LV400B & 0xFF):
 
267
                info->flash_id += FLASH_AM400B;
 
268
                info->sector_count = 11;
 
269
                info->size = 0x00080000;
 
270
                break;                                  /* => 512 kB        */
 
271
 
 
272
        case (AMD_ID_LV800T & 0xFF):
 
273
                info->flash_id += FLASH_AM800T;
 
274
                info->sector_count = 19;
 
275
                info->size = 0x00100000;
 
276
                break;                                  /* => 1 MB      */
 
277
 
 
278
        case (AMD_ID_LV800B & 0xFF):
 
279
                info->flash_id += FLASH_AM800B;
 
280
                info->sector_count = 19;
 
281
                info->size = 0x00100000;
 
282
                break;                                  /* => 1 MB      */
 
283
 
 
284
        case (AMD_ID_LV160T & 0xFF):
 
285
                info->flash_id += FLASH_AM160T;
 
286
                info->sector_count = 35;
 
287
                info->size = 0x00200000;
 
288
                break;                                  /* => 2 MB      */
 
289
 
 
290
        case (AMD_ID_LV160B & 0xFF):
 
291
                info->flash_id += FLASH_AM160B;
 
292
                info->sector_count = 35;
 
293
                info->size = 0x00200000;
 
294
                break;                                  /* => 2 MB      */
 
295
 
 
296
        case (AMD_ID_LV040B & 0xFF):
 
297
                info->flash_id += FLASH_AM040;
 
298
                info->sector_count = 8;
 
299
                info->size = 0x00080000;
 
300
                break;
 
301
 
 
302
        case (STM_ID_M29W040B & 0xFF):
 
303
                info->flash_id += FLASH_AM040;
 
304
                info->sector_count = 8;
 
305
                info->size = 0x00080000;
 
306
                break;
 
307
 
 
308
#if 0                                                   /* enable when device IDs are available */
 
309
        case (AMD_ID_LV320T & 0xFF):
 
310
                info->flash_id += FLASH_AM320T;
 
311
                info->sector_count = 67;
 
312
                info->size = 0x00400000;
 
313
                break;                                  /* => 4 MB      */
 
314
 
 
315
        case (AMD_ID_LV320B & 0xFF):
 
316
                info->flash_id += FLASH_AM320B;
 
317
                info->sector_count = 67;
 
318
                info->size = 0x00400000;
 
319
                break;                                  /* => 4 MB      */
 
320
#endif
 
321
        default:
 
322
                info->flash_id = FLASH_UNKNOWN;
 
323
                return (0);                             /* => no or unknown flash */
 
324
 
 
325
        }
 
326
 
 
327
        printf(" ");
 
328
        /* set up sector start address table */
 
329
        if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
 
330
                for (i = 0; i < info->sector_count; i++) {
 
331
                        info->start[i] = base + (i * 0x00010000);
 
332
                }
 
333
        } else if (info->flash_id & FLASH_BTYPE) {
 
334
                /* set sector offsets for bottom boot block type    */
 
335
                info->start[0] = base + 0x00000000;
 
336
                info->start[1] = base + 0x00004000;
 
337
                info->start[2] = base + 0x00006000;
 
338
                info->start[3] = base + 0x00008000;
 
339
                for (i = 4; i < info->sector_count; i++) {
 
340
                        info->start[i] = base + (i * 0x00010000) - 0x00030000;
 
341
                }
 
342
        } else {
 
343
                /* set sector offsets for top boot block type       */
 
344
                i = info->sector_count - 1;
 
345
                info->start[i--] = base + info->size - 0x00004000;
 
346
                info->start[i--] = base + info->size - 0x00006000;
 
347
                info->start[i--] = base + info->size - 0x00008000;
 
348
                for (; i >= 0; i--) {
 
349
                        info->start[i] = base + i * 0x00010000;
 
350
                }
 
351
        }
 
352
 
 
353
        /* check for protected sectors */
 
354
        for (i = 0; i < info->sector_count; i++) {
 
355
                /* read sector protection: D0 = 1 if protected */
 
356
                caddr = (volatile unsigned char *)(info->start[i]);
 
357
                info->protect[i] = caddr[2] & 1;
 
358
        }
 
359
 
 
360
        /*
 
361
         * Prevent writes to uninitialized FLASH.
 
362
         */
 
363
        if (info->flash_id != FLASH_UNKNOWN) {
 
364
                caddr = (vu_char *) info->start[0];
 
365
 
 
366
                caddr[0x0555] = 0xAA;
 
367
                caddr[0x02AA] = 0x55;
 
368
                caddr[0x0555] = 0xF0;
 
369
 
 
370
                udelay(20000);
 
371
        }
 
372
 
 
373
        return (info->size);
 
374
}
 
375
 
 
376
 
 
377
/*-----------------------------------------------------------------------
 
378
 */
 
379
 
 
380
int flash_erase(flash_info_t * info, int s_first, int s_last)
 
381
{
 
382
        vu_char *addr = (vu_char *) (info->start[0]);
 
383
        int flag, prot, sect, l_sect;
 
384
        ulong start, now, last;
 
385
 
 
386
        if ((s_first < 0) || (s_first > s_last)) {
 
387
                if (info->flash_id == FLASH_UNKNOWN) {
 
388
                        printf("- missing\n");
 
389
                } else {
 
390
                        printf("- no sectors to erase\n");
 
391
                }
 
392
                return 1;
 
393
        }
 
394
 
 
395
        if ((info->flash_id == FLASH_UNKNOWN) ||
 
396
            (info->flash_id > FLASH_AMD_COMP)) {
 
397
                printf("Can't erase unknown flash type %08lx - aborted\n", info->flash_id);
 
398
                return 1;
 
399
        }
 
400
 
 
401
        prot = 0;
 
402
        for (sect = s_first; sect <= s_last; ++sect) {
 
403
                if (info->protect[sect]) {
 
404
                        prot++;
 
405
                }
 
406
        }
 
407
 
 
408
        if (prot) {
 
409
                printf("- Warning: %d protected sectors will not be erased!\n", prot);
 
410
        } else {
 
411
                printf("\n");
 
412
        }
 
413
 
 
414
        l_sect = -1;
 
415
 
 
416
        /* Disable interrupts which might cause a timeout here */
 
417
        flag = disable_interrupts();
 
418
 
 
419
        addr[0x0555] = 0xAA;
 
420
        addr[0x02AA] = 0x55;
 
421
        addr[0x0555] = 0x80;
 
422
        addr[0x0555] = 0xAA;
 
423
        addr[0x02AA] = 0x55;
 
424
 
 
425
        /* Start erase on unprotected sectors */
 
426
        for (sect = s_first; sect <= s_last; sect++) {
 
427
                if (info->protect[sect] == 0) { /* not protected */
 
428
                        addr = (vu_char *) (info->start[sect]);
 
429
                        addr[0] = 0x30;
 
430
                        l_sect = sect;
 
431
                }
 
432
        }
 
433
 
 
434
        /* re-enable interrupts if necessary */
 
435
        if (flag)
 
436
                enable_interrupts();
 
437
 
 
438
        /* wait at least 80us - let's wait 1 ms */
 
439
        udelay(1000);
 
440
 
 
441
        /*
 
442
         * We wait for the last triggered sector
 
443
         */
 
444
        if (l_sect < 0)
 
445
                goto DONE;
 
446
 
 
447
        start = get_timer(0);
 
448
        last = start;
 
449
        addr = (vu_char *) (info->start[l_sect]);
 
450
        while ((addr[0] & 0x80) != 0x80) {
 
451
                if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 
452
                        printf("Timeout\n");
 
453
                        return 1;
 
454
                }
 
455
                /* show that we're waiting */
 
456
                if ((now - last) > 1000) {      /* every second */
 
457
                        putc('.');
 
458
                        last = now;
 
459
                }
 
460
        }
 
461
 
 
462
DONE:
 
463
        /* reset to read mode */
 
464
        addr = (vu_char *) info->start[0];
 
465
        addr[0] = 0xF0;                         /* reset bank */
 
466
 
 
467
        printf(" done\n");
 
468
        return 0;
 
469
}
 
470
 
 
471
/*-----------------------------------------------------------------------
 
472
 * Copy memory to flash, returns:
 
473
 * 0 - OK
 
474
 * 1 - write timeout
 
475
 * 2 - Flash not erased
 
476
 */
 
477
 
 
478
int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 
479
{
 
480
        int rc;
 
481
 
 
482
        while (cnt > 0) {
 
483
                if ((rc = write_byte(info, addr++, *src++)) != 0) {
 
484
                        return (rc);
 
485
                }
 
486
                --cnt;
 
487
        }
 
488
 
 
489
        return (0);
 
490
}
 
491
 
 
492
/*-----------------------------------------------------------------------
 
493
 * Write a word to Flash, returns:
 
494
 * 0 - OK
 
495
 * 1 - write timeout
 
496
 * 2 - Flash not erased
 
497
 */
 
498
static int write_byte(flash_info_t * info, ulong dest, uchar data)
 
499
{
 
500
        vu_char *addr = (vu_char *) (info->start[0]);
 
501
        ulong start;
 
502
        int flag;
 
503
 
 
504
        /* Check if Flash is (sufficiently) erased */
 
505
        if ((*((vu_char *) dest) & data) != data) {
 
506
                return (2);
 
507
        }
 
508
        /* Disable interrupts which might cause a timeout here */
 
509
        flag = disable_interrupts();
 
510
 
 
511
        addr[0x0555] = 0xAA;
 
512
        addr[0x02AA] = 0x55;
 
513
        addr[0x0555] = 0xA0;
 
514
 
 
515
        *((vu_char *) dest) = data;
 
516
 
 
517
        /* re-enable interrupts if necessary */
 
518
        if (flag)
 
519
                enable_interrupts();
 
520
 
 
521
        /* data polling for D7 */
 
522
        start = get_timer(0);
 
523
        while ((*((vu_char *) dest) & 0x80) != (data & 0x80)) {
 
524
                if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 
525
                        return (1);
 
526
                }
 
527
        }
 
528
        return (0);
 
529
}