]> git.kernelconcepts.de Git - karo-tx-uboot.git/blob - board/trab/flash.c
rename CFG_ macros to CONFIG_SYS
[karo-tx-uboot.git] / board / trab / flash.c
1 /*
2  * (C) Copyright 2002
3  * Gary Jennejohn, DENX Software Engineering, <gj@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 /* #define DEBUG */
25
26 #include <common.h>
27 #include <environment.h>
28
29 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
30
31 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
32
33
34 #define CMD_READ_ARRAY          0x00F000F0
35 #define CMD_UNLOCK1             0x00AA00AA
36 #define CMD_UNLOCK2             0x00550055
37 #define CMD_ERASE_SETUP         0x00800080
38 #define CMD_ERASE_CONFIRM       0x00300030
39 #define CMD_PROGRAM             0x00A000A0
40 #define CMD_UNLOCK_BYPASS       0x00200020
41 #define CMD_READ_MANF_ID        0x00900090
42 #define CMD_UNLOCK_BYPASS_RES1  0x00900090
43 #define CMD_UNLOCK_BYPASS_RES2  0x00000000
44
45 #define MEM_FLASH_ADDR          (*(volatile u32 *)CONFIG_SYS_FLASH_BASE)
46 #define MEM_FLASH_ADDR1         (*(volatile u32 *)(CONFIG_SYS_FLASH_BASE + (0x00000555 << 2)))
47 #define MEM_FLASH_ADDR2         (*(volatile u32 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA << 2)))
48
49 #define BIT_ERASE_DONE          0x00800080
50 #define BIT_RDY_MASK            0x00800080
51 #define BIT_PROGRAM_ERROR       0x00200020
52 #define BIT_TIMEOUT             0x80000000      /* our flag */
53
54 #define READY 1
55 #define ERR   2
56 #define TMO   4
57
58 /*-----------------------------------------------------------------------
59  */
60
61 ulong flash_init (void)
62 {
63         int i, j;
64         ulong size = 0;
65
66         for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
67                 ulong flashbase = 0;
68                 flash_info_t *info = &flash_info[i];
69
70                 /* Init: no FLASHes known */
71                 info->flash_id = FLASH_UNKNOWN;
72
73                 size += flash_get_size (CONFIG_SYS_FLASH_BASE, info);
74
75                 if (i == 0)
76                         flashbase = CONFIG_SYS_FLASH_BASE;
77                 else
78                         panic ("configured too many flash banks!\n");
79                 for (j = 0; j < info->sector_count; j++) {
80
81                         info->protect[j] = 0;
82                         info->start[j] = flashbase;
83
84                         switch (info->flash_id & FLASH_TYPEMASK) {
85                         case (FLASH_AM320B & FLASH_TYPEMASK):
86                         case (FLASH_MXLV320B & FLASH_TYPEMASK):
87                                 /* Boot sector type: 8 x 8 + N x 128 kB */
88                                 flashbase += (j < 8) ? 0x4000 : 0x20000;
89                                 break;
90                         case (FLASH_AM640U & FLASH_TYPEMASK):
91                                 /* Uniform sector type: 128 kB */
92                                 flashbase += 0x20000;
93                                 break;
94                         default:
95                                 printf ("## Bad flash chip type 0x%04lX\n",
96                                         info->flash_id & FLASH_TYPEMASK);
97                         }
98                 }
99         }
100
101         /*
102          * Protect monitor and environment sectors
103          */
104         flash_protect ( FLAG_PROTECT_SET,
105                         CONFIG_SYS_FLASH_BASE,
106                         CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
107                         &flash_info[0]);
108
109         flash_protect ( FLAG_PROTECT_SET,
110                         CONFIG_ENV_ADDR,
111                         CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
112
113 #ifdef CONFIG_ENV_ADDR_REDUND
114         flash_protect ( FLAG_PROTECT_SET,
115                         CONFIG_ENV_ADDR_REDUND,
116                         CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SIZE_REDUND - 1,
117                         &flash_info[0]);
118 #endif
119
120         return size;
121 }
122
123 /*-----------------------------------------------------------------------
124  */
125 void flash_print_info (flash_info_t * info)
126 {
127         int i;
128
129         switch (info->flash_id & FLASH_VENDMASK) {
130         case (FLASH_MAN_AMD & FLASH_VENDMASK):
131                         printf ("AMD ");                break;
132         case (FLASH_MAN_FUJ & FLASH_VENDMASK):
133                         printf ("FUJITSU ");            break;
134         case (FLASH_MAN_MX  & FLASH_VENDMASK):
135                         printf ("MACRONIX ");           break;
136         default:        printf ("Unknown Vendor ");     break;
137         }
138
139         switch (info->flash_id & FLASH_TYPEMASK) {
140         case (FLASH_AM320B & FLASH_TYPEMASK):
141                 printf ("2x Am29LV320DB (32Mbit)\n");
142                 break;
143         case (FLASH_MXLV320B & FLASH_TYPEMASK):
144                 printf ("2x MX29LV320DB (32Mbit)\n");
145                 break;
146         case (FLASH_AM640U & FLASH_TYPEMASK):
147                 printf ("2x Am29LV640D (64Mbit)\n");
148                 break;
149         default:
150                 printf ("Unknown Chip Type\n");
151                 goto Done;
152                 break;
153         }
154
155         printf ("  Size: %ld MB in %d Sectors\n",
156                         info->size >> 20, info->sector_count);
157
158         printf ("  Sector Start Addresses:");
159         for (i = 0; i < info->sector_count; i++) {
160                 if ((i % 5) == 0) {
161                         printf ("\n   ");
162                 }
163                 printf (" %08lX%s",
164                         info->start[i],
165                         info->protect[i] ? " (RO)" : "     ");
166         }
167         printf ("\n");
168
169 Done:   ;
170 }
171
172 /*-----------------------------------------------------------------------
173  */
174
175 int flash_erase (flash_info_t * info, int s_first, int s_last)
176 {
177         ulong result;
178
179 #if 0
180         int cflag;
181 #endif
182         int iflag, prot, sect;
183         int rc = ERR_OK;
184         int chip1, chip2;
185
186         debug ("flash_erase: s_first %d  s_last %d\n", s_first, s_last);
187
188         /* first look for protection bits */
189
190         if (info->flash_id == FLASH_UNKNOWN)
191                 return ERR_UNKNOWN_FLASH_TYPE;
192
193         if ((s_first < 0) || (s_first > s_last)) {
194                 return ERR_INVAL;
195         }
196
197         switch (info->flash_id & FLASH_VENDMASK) {
198         case (FLASH_MAN_AMD & FLASH_VENDMASK):  break;  /* OK */
199         case (FLASH_MAN_FUJ & FLASH_VENDMASK):  break;  /* OK */
200         case (FLASH_MAN_MX  & FLASH_VENDMASK):  break;  /* OK */
201         default:
202                 debug ("## flash_erase: unknown manufacturer\n");
203                 return (ERR_UNKNOWN_FLASH_VENDOR);
204         }
205
206         prot = 0;
207         for (sect = s_first; sect <= s_last; ++sect) {
208                 if (info->protect[sect]) {
209                         prot++;
210                 }
211         }
212
213         if (prot) {
214                 printf ("- Warning: %d protected sectors will not be erased!\n",
215                         prot);
216         } else {
217                 printf ("\n");
218         }
219
220         /*
221          * Disable interrupts which might cause a timeout
222          * here. Remember that our exception vectors are
223          * at address 0 in the flash, and we don't want a
224          * (ticker) exception to happen while the flash
225          * chip is in programming mode.
226          */
227 #if 0
228         cflag = icache_status ();
229         icache_disable ();
230 #endif
231         iflag = disable_interrupts ();
232
233         /* Start erase on unprotected sectors */
234         for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
235
236                 debug ("Erasing sector %2d @ %08lX... ",
237                         sect, info->start[sect]);
238
239                 /* arm simple, non interrupt dependent timer */
240                 reset_timer_masked ();
241
242                 if (info->protect[sect] == 0) { /* not protected */
243                         vu_long *addr = (vu_long *) (info->start[sect]);
244
245                         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
246                         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
247                         MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
248
249                         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
250                         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
251                         *addr = CMD_ERASE_CONFIRM;
252
253                         /* wait until flash is ready */
254                         chip1 = chip2 = 0;
255
256                         do {
257                                 result = *addr;
258
259                                 /* check timeout */
260                                 if (get_timer_masked () > CONFIG_SYS_FLASH_ERASE_TOUT) {
261                                         MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
262                                         chip1 = TMO;
263                                         break;
264                                 }
265
266                                 if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE)
267                                         chip1 = READY;
268
269                                 if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR)
270                                         chip1 = ERR;
271
272                                 if (!chip2 && (result >> 16) & BIT_ERASE_DONE)
273                                         chip2 = READY;
274
275                                 if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR)
276                                         chip2 = ERR;
277
278                         } while (!chip1 || !chip2);
279
280                         MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
281
282                         if (chip1 == ERR || chip2 == ERR) {
283                                 rc = ERR_PROG_ERROR;
284                                 printf ("Flash erase error\n");
285                                 goto outahere;
286                         }
287                         if (chip1 == TMO) {
288                                 rc = ERR_TIMOUT;
289                                 printf ("Flash erase timeout error\n");
290                                 goto outahere;
291                         }
292                 }
293         }
294
295 outahere:
296         /* allow flash to settle - wait 10 ms */
297         udelay_masked (10000);
298
299         if (iflag)
300                 enable_interrupts ();
301
302 #if 0
303         if (cflag)
304                 icache_enable ();
305 #endif
306         return rc;
307 }
308
309 /*-----------------------------------------------------------------------
310  * Copy memory to flash
311  */
312
313 static int write_word (flash_info_t * info, ulong dest, ulong data)
314 {
315         vu_long *addr = (vu_long *) dest;
316         ulong result;
317         int rc = ERR_OK;
318
319 #if 0
320         int cflag;
321 #endif
322         int iflag;
323         int chip1, chip2;
324
325         /*
326          * Check if Flash is (sufficiently) erased
327          */
328         result = *addr;
329         if ((result & data) != data)
330                 return ERR_NOT_ERASED;
331
332         /*
333          * Disable interrupts which might cause a timeout
334          * here. Remember that our exception vectors are
335          * at address 0 in the flash, and we don't want a
336          * (ticker) exception to happen while the flash
337          * chip is in programming mode.
338          */
339 #if 0
340         cflag = icache_status ();
341         icache_disable ();
342 #endif
343         iflag = disable_interrupts ();
344
345         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
346         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
347         MEM_FLASH_ADDR1 = CMD_PROGRAM;
348         *addr = data;
349
350         /* arm simple, non interrupt dependent timer */
351         reset_timer_masked ();
352
353         /* wait until flash is ready */
354         chip1 = chip2 = 0;
355         do {
356                 result = *addr;
357
358                 /* check timeout */
359                 if (get_timer_masked () > CONFIG_SYS_FLASH_WRITE_TOUT) {
360                         chip1 = ERR | TMO;
361                         break;
362                 }
363                 if (!chip1 && ((result & 0x80) == (data & 0x80)))
364                         chip1 = READY;
365
366                 if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) {
367                         result = *addr;
368
369                         if ((result & 0x80) == (data & 0x80))
370                                 chip1 = READY;
371                         else
372                                 chip1 = ERR;
373                 }
374
375                 if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16))))
376                         chip2 = READY;
377
378                 if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR)) {
379                         result = *addr;
380
381                         if ((result & (0x80 << 16)) == (data & (0x80 << 16)))
382                                 chip2 = READY;
383                         else
384                                 chip2 = ERR;
385                 }
386
387         } while (!chip1 || !chip2);
388
389         *addr = CMD_READ_ARRAY;
390
391         if (chip1 == ERR || chip2 == ERR || *addr != data) {
392                 rc = ERR_PROG_ERROR;
393                 printf ("Flash program error\n");
394                 debug ("chip1: %#x, chip2: %#x, addr: %#lx *addr: %#lx, "
395                        "data: %#lx\n",
396                        chip1, chip2, addr, *addr, data);
397         }
398
399         if (iflag)
400                 enable_interrupts ();
401
402 #if 0
403         if (cflag)
404                 icache_enable ();
405 #endif
406
407         return rc;
408 }
409
410 /*-----------------------------------------------------------------------
411  * Copy memory to flash.
412  */
413
414 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
415 {
416         ulong cp, wp, data;
417         int l;
418         int i, rc;
419
420         wp = (addr & ~3);       /* get lower word aligned address */
421
422         /*
423          * handle unaligned start bytes
424          */
425         if ((l = addr - wp) != 0) {
426                 data = 0;
427                 for (i = 0, cp = wp; i < l; ++i, ++cp) {
428                         data = (data >> 8) | (*(uchar *) cp << 24);
429                 }
430                 for (; i < 4 && cnt > 0; ++i) {
431                         data = (data >> 8) | (*src++ << 24);
432                         --cnt;
433                         ++cp;
434                 }
435                 for (; cnt == 0 && i < 4; ++i, ++cp) {
436                         data = (data >> 8) | (*(uchar *) cp << 24);
437                 }
438
439                 if ((rc = write_word (info, wp, data)) != 0) {
440                         goto Done;
441                 }
442                 wp += 4;
443         }
444
445         /*
446          * handle word aligned part
447          */
448         while (cnt >= 4) {
449                 if (((ulong)src) & 0x3) {
450                         for (i = 0; i < 4; i++) {
451                                 ((char *)&data)[i] = ((vu_char *)src)[i];
452                         }
453                 }
454                 else {
455                         data = *((vu_long *) src);
456                 }
457
458                 if ((rc = write_word (info, wp, data)) != 0) {
459                         goto Done;
460                 }
461                 src += 4;
462                 wp += 4;
463                 cnt -= 4;
464         }
465
466         if (cnt == 0) {
467                 rc = ERR_OK;
468                 goto Done;
469         }
470
471         /*
472          * handle unaligned tail bytes
473          */
474         data = 0;
475         for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
476                 data = (data >> 8) | (*src++ << 24);
477                 --cnt;
478         }
479         for (; i < 4; ++i, ++cp) {
480                 data = (data >> 8) | (*(uchar *) cp << 24);
481         }
482
483         rc = write_word (info, wp, data);
484
485         Done:
486
487         return (rc);
488 }
489
490 /*-----------------------------------------------------------------------
491  */
492
493 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
494 {
495         ulong value;
496
497         /* Write auto select command sequence and read Manufacturer ID */
498         addr[0x0555] = CMD_UNLOCK1;
499         addr[0x02AA] = CMD_UNLOCK2;
500         addr[0x0555] = CMD_READ_MANF_ID;
501
502         value = addr[0];
503
504         debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
505
506         switch (value) {
507         case AMD_MANUFACT:
508                 info->flash_id = FLASH_MAN_AMD;
509                 break;
510         case FUJ_MANUFACT:
511                 info->flash_id = FLASH_MAN_FUJ;
512                 break;
513         case MX_MANUFACT:
514                 info->flash_id = FLASH_MAN_MX;
515                 break;
516         default:
517                 info->flash_id = FLASH_UNKNOWN;
518                 info->sector_count = 0;
519                 info->size = 0;
520                 addr[0] = CMD_READ_ARRAY;       /* restore read mode */
521                 debug ("## flash_init: unknown manufacturer\n");
522                 return (0);                     /* no or unknown flash  */
523         }
524
525         value = addr[1];                        /* device ID            */
526
527         debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
528
529         switch (value) {
530         case AMD_ID_LV320B:
531                 info->flash_id += FLASH_AM320B;
532                 info->sector_count = 71;
533                 info->size = 0x00800000;
534
535                 addr[0] = CMD_READ_ARRAY;       /* restore read mode */
536                 break;                          /* =>  8 MB             */
537
538         case AMD_ID_LV640U:
539                 info->flash_id += FLASH_AM640U;
540                 info->sector_count = 128;
541                 info->size = 0x01000000;
542
543                 addr[0] = CMD_READ_ARRAY;       /* restore read mode */
544                 break;                          /* => 16 MB             */
545
546         case MX_ID_LV320B:
547                 info->flash_id += FLASH_MXLV320B;
548                 info->sector_count = 71;
549                 info->size = 0x00800000;
550
551                 addr[0] = CMD_READ_ARRAY;       /* restore read mode */
552                 break;                          /* =>  8 MB             */
553
554         default:
555                 debug ("## flash_init: unknown flash chip\n");
556                 info->flash_id = FLASH_UNKNOWN;
557                 addr[0] = CMD_READ_ARRAY;       /* restore read mode */
558                 return (0);                     /* => no or unknown flash */
559
560         }
561
562         if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
563                 printf ("** ERROR: sector count %d > max (%d) **\n",
564                         info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
565                 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
566         }
567
568         return (info->size);
569 }