Merge with /home/wd/git/u-boot/master
[platform/kernel/u-boot.git] / board / amcc / common / flash.c
1 /*
2  * (C) Copyright 2004-2005
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * (C) Copyright 2002 Jun Gu <jung@artesyncp.com>
6  * Add support for Am29F016D and dynamic switch setting.
7  *
8  * See file CREDITS for list of people who contributed to this
9  * project.
10  *
11  * This program is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU General Public License as
13  * published by the Free Software Foundation; either version 2 of
14  * the License, or (at your option) any later version.
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19  * GNU General Public License for more details.
20  *
21  * You should have received a copy of the GNU General Public License
22  * along with this program; if not, write to the Free Software
23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24  * MA 02111-1307 USA
25  */
26
27 /*
28  * Modified 4/5/2001
29  * Wait for completion of each sector erase command issued
30  * 4/5/2001
31  * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
32  */
33
34 #include <common.h>
35 #include <ppc4xx.h>
36 #include <asm/processor.h>
37
38 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];   /* info for FLASH chips */
39
40 /*-----------------------------------------------------------------------
41  * Functions
42  */
43 static int write_word(flash_info_t * info, ulong dest, ulong data);
44 #ifdef CFG_FLASH_2ND_16BIT_DEV
45 static int write_word_1(flash_info_t * info, ulong dest, ulong data);
46 static int write_word_2(flash_info_t * info, ulong dest, ulong data);
47 static int flash_erase_1(flash_info_t * info, int s_first, int s_last);
48 static int flash_erase_2(flash_info_t * info, int s_first, int s_last);
49 static ulong flash_get_size_1(vu_long * addr, flash_info_t * info);
50 static ulong flash_get_size_2(vu_long * addr, flash_info_t * info);
51 #endif
52
53 void flash_print_info(flash_info_t * info)
54 {
55         int i;
56         int k;
57         int size;
58         int erased;
59         volatile unsigned long *flash;
60
61         if (info->flash_id == FLASH_UNKNOWN) {
62                 printf("missing or unknown FLASH type\n");
63                 return;
64         }
65
66         switch (info->flash_id & FLASH_VENDMASK) {
67         case FLASH_MAN_AMD:
68                 printf("AMD ");
69                 break;
70         case FLASH_MAN_STM:
71                 printf("STM ");
72                 break;
73         case FLASH_MAN_FUJ:
74                 printf("FUJITSU ");
75                 break;
76         case FLASH_MAN_SST:
77                 printf("SST ");
78                 break;
79         case FLASH_MAN_MX:
80                 printf ("MACRONIX ");
81                 break;
82         default:
83                 printf("Unknown Vendor ");
84                 break;
85         }
86
87         switch (info->flash_id & FLASH_TYPEMASK) {
88         case FLASH_AM040:
89                 printf("AM29F040 (512 Kbit, uniform sector size)\n");
90                 break;
91         case FLASH_AM400B:
92                 printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
93                 break;
94         case FLASH_AM400T:
95                 printf("AM29LV400T (4 Mbit, top boot sector)\n");
96                 break;
97         case FLASH_AM800B:
98                 printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
99                 break;
100         case FLASH_AM800T:
101                 printf("AM29LV800T (8 Mbit, top boot sector)\n");
102                 break;
103         case FLASH_AMD016:
104                 printf("AM29F016D (16 Mbit, uniform sector size)\n");
105                 break;
106         case FLASH_AM160B:
107                 printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
108                 break;
109         case FLASH_AM160T:
110                 printf("AM29LV160T (16 Mbit, top boot sector)\n");
111                 break;
112         case FLASH_AM320B:
113                 printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
114                 break;
115         case FLASH_AM320T:
116                 printf("AM29LV320T (32 Mbit, top boot sector)\n");
117                 break;
118         case FLASH_AM033C:
119                 printf("AM29LV033C (32 Mbit, top boot sector)\n");
120                 break;
121         case FLASH_SST800A:
122                 printf("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
123                 break;
124         case FLASH_SST160A:
125                 printf("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
126                 break;
127         case FLASH_STMW320DT:
128                 printf ("M29W320DT (32 M, top sector)\n");
129                 break;
130         case FLASH_MXLV320T:
131                 printf ("MXLV320T (32 Mbit, top sector)\n");
132                 break;
133         default:
134                 printf("Unknown Chip Type\n");
135                 break;
136         }
137
138         printf("  Size: %ld KB in %d Sectors\n",
139                info->size >> 10, info->sector_count);
140
141         printf("  Sector Start Addresses:");
142         for (i = 0; i < info->sector_count; ++i) {
143                 /*
144                  * Check if whole sector is erased
145                  */
146                 if (i != (info->sector_count - 1))
147                         size = info->start[i + 1] - info->start[i];
148                 else
149                         size = info->start[0] + info->size - info->start[i];
150                 erased = 1;
151                 flash = (volatile unsigned long *)info->start[i];
152                 size = size >> 2;       /* divide by 4 for longword access */
153                 for (k = 0; k < size; k++) {
154                         if (*flash++ != 0xffffffff) {
155                                 erased = 0;
156                                 break;
157                         }
158                 }
159
160                 if ((i % 5) == 0)
161                         printf("\n   ");
162                 printf(" %08lX%s%s",
163                        info->start[i],
164                        erased ? " E" : "  ", info->protect[i] ? "RO " : "   ");
165         }
166         printf("\n");
167         return;
168 }
169
170
171 /*
172  * The following code cannot be run from FLASH!
173  */
174 #ifdef CFG_FLASH_2ND_16BIT_DEV
175 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
176 {
177         /* bit 0 used for big flash marking */
178         if ((ulong)addr & 0x1) {
179                 return flash_get_size_2((vu_long *)((ulong)addr & 0xfffffffe), info);
180         } else {
181                 return flash_get_size_1(addr, info);
182         }
183 }
184
185 static ulong flash_get_size_1(vu_long * addr, flash_info_t * info)
186 #else
187 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
188 #endif
189 {
190         short i;
191         CFG_FLASH_WORD_SIZE value;
192         ulong base = (ulong) addr;
193         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) addr;
194
195         DEBUGF("FLASH ADDR: %08x\n", (unsigned)addr);
196
197         /* Write auto select command: read Manufacturer ID */
198         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
199         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
200         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00900090;
201         udelay(1000);
202
203         value = addr2[0];
204         DEBUGF("FLASH MANUFACT: %x\n", value);
205
206         switch (value) {
207         case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT:
208                 info->flash_id = FLASH_MAN_AMD;
209                 break;
210         case (CFG_FLASH_WORD_SIZE) FUJ_MANUFACT:
211                 info->flash_id = FLASH_MAN_FUJ;
212                 break;
213         case (CFG_FLASH_WORD_SIZE) SST_MANUFACT:
214                 info->flash_id = FLASH_MAN_SST;
215                 break;
216         case (CFG_FLASH_WORD_SIZE) STM_MANUFACT:
217                 info->flash_id = FLASH_MAN_STM;
218                 break;
219         default:
220                 info->flash_id = FLASH_UNKNOWN;
221                 info->sector_count = 0;
222                 info->size = 0;
223                 return (0);     /* no or unknown flash  */
224         }
225
226         value = addr2[1];       /* device ID */
227         DEBUGF("\nFLASH DEVICEID: %x\n", value);
228
229         switch (value) {
230         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV040B:
231                 info->flash_id += FLASH_AM040;
232                 info->sector_count = 8;
233                 info->size = 0x0080000;         /* => 512 KiB */
234                 break;
235
236         case (CFG_FLASH_WORD_SIZE) AMD_ID_F040B:
237                 info->flash_id += FLASH_AM040;
238                 info->sector_count = 8;
239                 info->size = 0x0080000;         /* => 512 KiB */
240                 break;
241
242         case (CFG_FLASH_WORD_SIZE) STM_ID_M29W040B:
243                 info->flash_id += FLASH_AM040;
244                 info->sector_count = 8;
245                 info->size = 0x0080000;         /* => 512 KiB */
246                 break;
247
248         case (CFG_FLASH_WORD_SIZE) AMD_ID_F016D:
249                 info->flash_id += FLASH_AMD016;
250                 info->sector_count = 32;
251                 info->size = 0x00200000;        /* => 2 MiB */
252                 break;
253
254         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV033C:
255                 info->flash_id += FLASH_AMDLV033C;
256                 info->sector_count = 64;
257                 info->size = 0x00400000;        /* => 4 MiB */
258                 break;
259
260         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV400T:
261                 info->flash_id += FLASH_AM400T;
262                 info->sector_count = 11;
263                 info->size = 0x00080000;        /* => 512 KiB */
264                 break;
265
266         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV400B:
267                 info->flash_id += FLASH_AM400B;
268                 info->sector_count = 11;
269                 info->size = 0x00080000;        /* => 512 KiB */
270                 break;
271
272         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV800T:
273                 info->flash_id += FLASH_AM800T;
274                 info->sector_count = 19;
275                 info->size = 0x00100000;        /* => 1 MiB */
276                 break;
277
278         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV800B:
279                 info->flash_id += FLASH_AM800B;
280                 info->sector_count = 19;
281                 info->size = 0x00100000;        /* => 1 MiB */
282                 break;
283
284         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV160T:
285                 info->flash_id += FLASH_AM160T;
286                 info->sector_count = 35;
287                 info->size = 0x00200000;        /* => 2 MiB */
288                 break;
289
290         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV160B:
291                 info->flash_id += FLASH_AM160B;
292                 info->sector_count = 35;
293                 info->size = 0x00200000;        /* => 2 MiB */
294                 break;
295
296         default:
297                 info->flash_id = FLASH_UNKNOWN;
298                 return (0);     /* => no or unknown flash */
299         }
300
301         /* set up sector start address table */
302         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
303             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) ||
304             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMD016)) {
305                 for (i = 0; i < info->sector_count; i++)
306                         info->start[i] = base + (i * 0x00010000);
307         } else {
308                 if (info->flash_id & FLASH_BTYPE) {
309                         /* set sector offsets for bottom boot block type */
310                         info->start[0] = base + 0x00000000;
311                         info->start[1] = base + 0x00004000;
312                         info->start[2] = base + 0x00006000;
313                         info->start[3] = base + 0x00008000;
314                         for (i = 4; i < info->sector_count; i++) {
315                                 info->start[i] =
316                                     base + (i * 0x00010000) - 0x00030000;
317                         }
318                 } else {
319                         /* set sector offsets for top boot block type */
320                         i = info->sector_count - 1;
321                         info->start[i--] = base + info->size - 0x00004000;
322                         info->start[i--] = base + info->size - 0x00006000;
323                         info->start[i--] = base + info->size - 0x00008000;
324                         for (; i >= 0; i--) {
325                                 info->start[i] = base + i * 0x00010000;
326                         }
327                 }
328         }
329
330         /* check for protected sectors */
331         for (i = 0; i < info->sector_count; i++) {
332                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
333                 /* D0 = 1 if protected */
334                 addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);
335
336                 /* For AMD29033C flash we need to resend the command of *
337                  * reading flash protection for upper 8 Mb of flash     */
338                 if (i == 32) {
339                         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAAAAAAAA;
340                         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55555555;
341                         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x90909090;
342                 }
343
344                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
345                         info->protect[i] = 0;
346                 else
347                         info->protect[i] = addr2[2] & 1;
348         }
349
350         /* issue bank reset to return to read mode */
351         addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;
352
353         return (info->size);
354 }
355
356 static int wait_for_DQ7_1(flash_info_t * info, int sect)
357 {
358         ulong start, now, last;
359         volatile CFG_FLASH_WORD_SIZE *addr =
360             (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
361
362         start = get_timer(0);
363         last = start;
364         while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
365                (CFG_FLASH_WORD_SIZE) 0x00800080) {
366                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
367                         printf("Timeout\n");
368                         return -1;
369                 }
370                 /* show that we're waiting */
371                 if ((now - last) > 1000) {      /* every second */
372                         putc('.');
373                         last = now;
374                 }
375         }
376         return 0;
377 }
378
379 #ifdef CFG_FLASH_2ND_16BIT_DEV
380 int flash_erase(flash_info_t * info, int s_first, int s_last)
381 {
382         if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
383             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
384             ((info->flash_id & FLASH_TYPEMASK) == FLASH_MXLV320T) ||
385             ((info->flash_id & FLASH_TYPEMASK) == FLASH_STMW320DT)) {
386                 return flash_erase_2(info, s_first, s_last);
387         } else {
388                 return flash_erase_1(info, s_first, s_last);
389         }
390 }
391
392 static int flash_erase_1(flash_info_t * info, int s_first, int s_last)
393 #else
394 int flash_erase(flash_info_t * info, int s_first, int s_last)
395 #endif
396 {
397         volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
398         volatile CFG_FLASH_WORD_SIZE *addr2;
399         int flag, prot, sect, l_sect;
400         int i;
401
402         if ((s_first < 0) || (s_first > s_last)) {
403                 if (info->flash_id == FLASH_UNKNOWN) {
404                         printf("- missing\n");
405                 } else {
406                         printf("- no sectors to erase\n");
407                 }
408                 return 1;
409         }
410
411         if (info->flash_id == FLASH_UNKNOWN) {
412                 printf("Can't erase unknown flash type - aborted\n");
413                 return 1;
414         }
415
416         prot = 0;
417         for (sect = s_first; sect <= s_last; ++sect) {
418                 if (info->protect[sect]) {
419                         prot++;
420                 }
421         }
422
423         if (prot) {
424                 printf("- Warning: %d protected sectors will not be erased!\n",
425                        prot);
426         } else {
427                 printf("\n");
428         }
429
430         l_sect = -1;
431
432         /* Disable interrupts which might cause a timeout here */
433         flag = disable_interrupts();
434
435         /* Start erase on unprotected sectors */
436         for (sect = s_first; sect <= s_last; sect++) {
437                 if (info->protect[sect] == 0) { /* not protected */
438                         addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
439
440                         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
441                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
442                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
443                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
444                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
445                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
446                                 addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00500050;    /* block erase */
447                                 for (i = 0; i < 50; i++)
448                                         udelay(1000);   /* wait 1 ms */
449                         } else {
450                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
451                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
452                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
453                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
454                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
455                                 addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00300030;    /* sector erase */
456                         }
457                         l_sect = sect;
458                         /*
459                          * Wait for each sector to complete, it's more
460                          * reliable.  According to AMD Spec, you must
461                          * issue all erase commands within a specified
462                          * timeout.  This has been seen to fail, especially
463                          * if printf()s are included (for debug)!!
464                          */
465                         wait_for_DQ7_1(info, sect);
466                 }
467         }
468
469         /* re-enable interrupts if necessary */
470         if (flag)
471                 enable_interrupts();
472
473         /* wait at least 80us - let's wait 1 ms */
474         udelay(1000);
475
476         /* reset to read mode */
477         addr = (CFG_FLASH_WORD_SIZE *) info->start[0];
478         addr[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;     /* reset bank */
479
480         printf(" done\n");
481         return 0;
482 }
483
484 /*-----------------------------------------------------------------------
485  * Copy memory to flash, returns:
486  * 0 - OK
487  * 1 - write timeout
488  * 2 - Flash not erased
489  */
490 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
491 {
492         ulong cp, wp, data;
493         int i, l, rc;
494
495         wp = (addr & ~3);       /* get lower word aligned address */
496
497         /*
498          * handle unaligned start bytes
499          */
500         if ((l = addr - wp) != 0) {
501                 data = 0;
502                 for (i = 0, cp = wp; i < l; ++i, ++cp) {
503                         data = (data << 8) | (*(uchar *) cp);
504                 }
505                 for (; i < 4 && cnt > 0; ++i) {
506                         data = (data << 8) | *src++;
507                         --cnt;
508                         ++cp;
509                 }
510                 for (; cnt == 0 && i < 4; ++i, ++cp) {
511                         data = (data << 8) | (*(uchar *) cp);
512                 }
513
514                 if ((rc = write_word(info, wp, data)) != 0) {
515                         return (rc);
516                 }
517                 wp += 4;
518         }
519
520         /*
521          * handle word aligned part
522          */
523         while (cnt >= 4) {
524                 data = 0;
525                 for (i = 0; i < 4; ++i) {
526                         data = (data << 8) | *src++;
527                 }
528                 if ((rc = write_word(info, wp, data)) != 0) {
529                         return (rc);
530                 }
531                 wp += 4;
532                 cnt -= 4;
533         }
534
535         if (cnt == 0) {
536                 return (0);
537         }
538
539         /*
540          * handle unaligned tail bytes
541          */
542         data = 0;
543         for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
544                 data = (data << 8) | *src++;
545                 --cnt;
546         }
547         for (; i < 4; ++i, ++cp) {
548                 data = (data << 8) | (*(uchar *) cp);
549         }
550
551         return (write_word(info, wp, data));
552 }
553
554 /*-----------------------------------------------------------------------
555  * Copy memory to flash, returns:
556  * 0 - OK
557  * 1 - write timeout
558  * 2 - Flash not erased
559  */
560 #ifdef CFG_FLASH_2ND_16BIT_DEV
561 static int write_word(flash_info_t * info, ulong dest, ulong data)
562 {
563         if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
564             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
565             ((info->flash_id & FLASH_TYPEMASK) == FLASH_MXLV320T) ||
566             ((info->flash_id & FLASH_TYPEMASK) == FLASH_STMW320DT)) {
567                 return write_word_2(info, dest, data);
568         } else {
569                 return write_word_1(info, dest, data);
570         }
571 }
572
573 static int write_word_1(flash_info_t * info, ulong dest, ulong data)
574 #else
575 static int write_word(flash_info_t * info, ulong dest, ulong data)
576 #endif
577 {
578         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
579         volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *) dest;
580         volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *) & data;
581         ulong start;
582         int i;
583
584         /* Check if Flash is (sufficiently) erased */
585         if ((*((vu_long *)dest) & data) != data) {
586                 return (2);
587         }
588
589         for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
590                 int flag;
591
592                 /* Disable interrupts which might cause a timeout here */
593                 flag = disable_interrupts();
594
595                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
596                 addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
597                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00A000A0;
598
599                 dest2[i] = data2[i];
600
601                 /* re-enable interrupts if necessary */
602                 if (flag)
603                         enable_interrupts();
604
605                 /* data polling for D7 */
606                 start = get_timer(0);
607                 while ((dest2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
608                        (data2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080)) {
609
610                         if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
611                                 return (1);
612                         }
613                 }
614         }
615
616         return (0);
617 }
618
619 #ifdef CFG_FLASH_2ND_16BIT_DEV
620
621 #undef  CFG_FLASH_WORD_SIZE
622 #define CFG_FLASH_WORD_SIZE unsigned short
623
624 /*
625  * The following code cannot be run from FLASH!
626  */
627 static ulong flash_get_size_2(vu_long * addr, flash_info_t * info)
628 {
629         short i;
630         int n;
631         CFG_FLASH_WORD_SIZE value;
632         ulong base = (ulong) addr;
633         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) addr;
634
635         DEBUGF("FLASH ADDR: %08x\n", (unsigned)addr);
636
637         /* Write auto select command: read Manufacturer ID */
638         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
639         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
640         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00900090;
641         udelay(1000);
642
643         value = addr2[0];
644         DEBUGF("FLASH MANUFACT: %x\n", value);
645
646         switch (value) {
647         case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT:
648                 info->flash_id = FLASH_MAN_AMD;
649                 break;
650         case (CFG_FLASH_WORD_SIZE) FUJ_MANUFACT:
651                 info->flash_id = FLASH_MAN_FUJ;
652                 break;
653         case (CFG_FLASH_WORD_SIZE) SST_MANUFACT:
654                 info->flash_id = FLASH_MAN_SST;
655                 break;
656         case (CFG_FLASH_WORD_SIZE) STM_MANUFACT:
657                 info->flash_id = FLASH_MAN_STM;
658                 break;
659         case (CFG_FLASH_WORD_SIZE) MX_MANUFACT:
660                 info->flash_id = FLASH_MAN_MX;
661                 break;
662         default:
663                 info->flash_id = FLASH_UNKNOWN;
664                 info->sector_count = 0;
665                 info->size = 0;
666                 return (0);     /* no or unknown flash  */
667         }
668
669         value = addr2[1];       /* device ID */
670
671         DEBUGF("\nFLASH DEVICEID: %x\n", value);
672
673         switch (value) {
674
675         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320T:
676                 info->flash_id += FLASH_AM320T;
677                 info->sector_count = 71;
678                 info->size = 0x00400000;  break;        /* => 4 MiB     */
679
680         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320B:
681                 info->flash_id += FLASH_AM320B;
682                 info->sector_count = 71;
683                 info->size = 0x00400000;  break;        /* => 4 MiB     */
684
685         case (CFG_FLASH_WORD_SIZE)STM_ID_29W320DT:
686                 info->flash_id += FLASH_STMW320DT;
687                 info->sector_count = 67;
688                 info->size = 0x00400000;  break;        /* => 4 MiB     */
689
690         case (CFG_FLASH_WORD_SIZE)MX_ID_LV320T:
691                 info->flash_id += FLASH_MXLV320T;
692                 info->sector_count = 71;
693                 info->size = 0x00400000;
694                 break;  /* => 4 MB      */
695
696         default:
697                 info->flash_id = FLASH_UNKNOWN;
698                 return (0);     /* => no or unknown flash */
699         }
700
701         /* set up sector start address table */
702         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
703             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) ||
704             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMD016)) {
705                 for (i = 0; i < info->sector_count; i++)
706                         info->start[i] = base + (i * 0x00010000);
707         } else if ((info->flash_id & FLASH_TYPEMASK) == FLASH_STMW320DT) {
708                 /* set sector offsets for top boot block type           */
709                 base += info->size;
710                 i = info->sector_count;
711                 /*  1 x 16k boot sector */
712                 base -= 16 << 10;
713                 --i;
714                 info->start[i] = base;
715                 /*  2 x 8k  boot sectors */
716                 for (n=0; n<2; ++n) {
717                         base -= 8 << 10;
718                         --i;
719                         info->start[i] = base;
720                 }
721                 /*  1 x 32k boot sector */
722                 base -= 32 << 10;
723                 --i;
724                 info->start[i] = base;
725
726                 while (i > 0) {                 /* 64k regular sectors  */
727                         base -= 64 << 10;
728                         --i;
729                         info->start[i] = base;
730                 }
731         } else if ((info->flash_id & FLASH_TYPEMASK) == FLASH_MXLV320T) {
732                 i = info->sector_count - 1;
733                 info->start[i--] = base + info->size - 0x00002000;
734                 info->start[i--] = base + info->size - 0x00004000;
735                 info->start[i--] = base + info->size - 0x00006000;
736                 info->start[i--] = base + info->size - 0x00008000;
737                 info->start[i--] = base + info->size - 0x0000a000;
738                 info->start[i--] = base + info->size - 0x0000c000;
739                 info->start[i--] = base + info->size - 0x0000e000;
740                 info->start[i--] = base + info->size - 0x00010000;
741
742                 for (; i >= 0; i--)
743                         info->start[i] = base + i * 0x00010000;
744         } else {
745                 if (info->flash_id & FLASH_BTYPE) {
746                         /* set sector offsets for bottom boot block type */
747                         info->start[0] = base + 0x00000000;
748                         info->start[1] = base + 0x00004000;
749                         info->start[2] = base + 0x00006000;
750                         info->start[3] = base + 0x00008000;
751                         for (i = 4; i < info->sector_count; i++) {
752                                 info->start[i] =
753                                     base + (i * 0x00010000) - 0x00030000;
754                         }
755                 } else {
756                         /* set sector offsets for top boot block type */
757                         i = info->sector_count - 1;
758                         info->start[i--] = base + info->size - 0x00004000;
759                         info->start[i--] = base + info->size - 0x00006000;
760                         info->start[i--] = base + info->size - 0x00008000;
761                         for (; i >= 0; i--) {
762                                 info->start[i] = base + i * 0x00010000;
763                         }
764                 }
765         }
766
767         /* check for protected sectors */
768         for (i = 0; i < info->sector_count; i++) {
769                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
770                 /* D0 = 1 if protected */
771                 addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);
772
773                 /* For AMD29033C flash we need to resend the command of *
774                  * reading flash protection for upper 8 Mb of flash     */
775                 if (i == 32) {
776                         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAAAAAAAA;
777                         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55555555;
778                         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x90909090;
779                 }
780
781                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
782                         info->protect[i] = 0;
783                 else
784                         info->protect[i] = addr2[2] & 1;
785         }
786
787         /* issue bank reset to return to read mode */
788         addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;
789
790         return (info->size);
791 }
792
793 static int wait_for_DQ7_2(flash_info_t * info, int sect)
794 {
795         ulong start, now, last;
796         volatile CFG_FLASH_WORD_SIZE *addr =
797             (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
798
799         start = get_timer(0);
800         last = start;
801         while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
802                (CFG_FLASH_WORD_SIZE) 0x00800080) {
803                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
804                         printf("Timeout\n");
805                         return -1;
806                 }
807                 /* show that we're waiting */
808                 if ((now - last) > 1000) {      /* every second */
809                         putc('.');
810                         last = now;
811                 }
812         }
813         return 0;
814 }
815
816 static int flash_erase_2(flash_info_t * info, int s_first, int s_last)
817 {
818         volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
819         volatile CFG_FLASH_WORD_SIZE *addr2;
820         int flag, prot, sect, l_sect;
821         int i;
822
823         if ((s_first < 0) || (s_first > s_last)) {
824                 if (info->flash_id == FLASH_UNKNOWN) {
825                         printf("- missing\n");
826                 } else {
827                         printf("- no sectors to erase\n");
828                 }
829                 return 1;
830         }
831
832         if (info->flash_id == FLASH_UNKNOWN) {
833                 printf("Can't erase unknown flash type - aborted\n");
834                 return 1;
835         }
836
837         prot = 0;
838         for (sect = s_first; sect <= s_last; ++sect) {
839                 if (info->protect[sect]) {
840                         prot++;
841                 }
842         }
843
844         if (prot) {
845                 printf("- Warning: %d protected sectors will not be erased!\n",
846                        prot);
847         } else {
848                 printf("\n");
849         }
850
851         l_sect = -1;
852
853         /* Disable interrupts which might cause a timeout here */
854         flag = disable_interrupts();
855
856         /* Start erase on unprotected sectors */
857         for (sect = s_first; sect <= s_last; sect++) {
858                 if (info->protect[sect] == 0) { /* not protected */
859                         addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
860
861                         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
862                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
863                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
864                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
865                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
866                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
867                                 addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00500050;    /* block erase */
868                                 for (i = 0; i < 50; i++)
869                                         udelay(1000);   /* wait 1 ms */
870                         } else {
871                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
872                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
873                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
874                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
875                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
876                                 addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00300030;    /* sector erase */
877                         }
878                         l_sect = sect;
879                         /*
880                          * Wait for each sector to complete, it's more
881                          * reliable.  According to AMD Spec, you must
882                          * issue all erase commands within a specified
883                          * timeout.  This has been seen to fail, especially
884                          * if printf()s are included (for debug)!!
885                          */
886                         wait_for_DQ7_2(info, sect);
887                 }
888         }
889
890         /* re-enable interrupts if necessary */
891         if (flag)
892                 enable_interrupts();
893
894         /* wait at least 80us - let's wait 1 ms */
895         udelay(1000);
896
897         /* reset to read mode */
898         addr = (CFG_FLASH_WORD_SIZE *) info->start[0];
899         addr[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;     /* reset bank */
900
901         printf(" done\n");
902         return 0;
903 }
904
905 static int write_word_2(flash_info_t * info, ulong dest, ulong data)
906 {
907         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
908         volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *) dest;
909         volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *) & data;
910         ulong start;
911         int i;
912
913         /* Check if Flash is (sufficiently) erased */
914         if ((*((vu_long *)dest) & data) != data) {
915                 return (2);
916         }
917
918         for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
919                 int flag;
920
921                 /* Disable interrupts which might cause a timeout here */
922                 flag = disable_interrupts();
923
924                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
925                 addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
926                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00A000A0;
927
928                 dest2[i] = data2[i];
929
930                 /* re-enable interrupts if necessary */
931                 if (flag)
932                         enable_interrupts();
933
934                 /* data polling for D7 */
935                 start = get_timer(0);
936                 while ((dest2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
937                        (data2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080)) {
938
939                         if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
940                                 return (1);
941                         }
942                 }
943         }
944
945         return (0);
946 }
947 #endif /* CFG_FLASH_2ND_16BIT_DEV */