3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
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.
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.
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,
26 #include <asm/processor.h>
27 #include <asm/pci_io.h>
30 #define ROM_CS0_START 0xFF800000
31 #define ROM_CS1_START 0xFF000000
33 flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
35 #if defined(CFG_ENV_IS_IN_FLASH)
37 # define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
40 # define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
42 # ifndef CFG_ENV_SECT_SIZE
43 # define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
47 /*-----------------------------------------------------------------------
50 static int write_word (flash_info_t *info, ulong dest, ulong data);
52 static void flash_get_offsets (ulong base, flash_info_t *info);
55 /*flash command address offsets*/
67 #define FLASH_WORD_SIZE unsigned char
69 /*-----------------------------------------------------------------------
73 static int byte_parity_odd(unsigned char x) __attribute__ ((const));
75 static unsigned long flash_id(unsigned char mfct, unsigned char chip) __attribute__ ((const));
79 FLASH_WORD_SIZE extval;
80 unsigned short intval;
85 byte_parity_odd(unsigned char x)
90 return (x & 0x1) != 0;
96 flash_id(unsigned char mfct, unsigned char chip)
98 static const map_entry mfct_map[] =
100 {(FLASH_WORD_SIZE) AMD_MANUFACT, (unsigned short) ((unsigned long) FLASH_MAN_AMD >> 16)},
101 {(FLASH_WORD_SIZE) FUJ_MANUFACT, (unsigned short) ((unsigned long) FLASH_MAN_FUJ >> 16)},
102 {(FLASH_WORD_SIZE) STM_MANUFACT, (unsigned short) ((unsigned long) FLASH_MAN_STM >> 16)},
103 {(FLASH_WORD_SIZE) MT_MANUFACT, (unsigned short) ((unsigned long) FLASH_MAN_MT >> 16)},
104 {(FLASH_WORD_SIZE) INTEL_MANUFACT,(unsigned short) ((unsigned long) FLASH_MAN_INTEL >> 16)},
105 {(FLASH_WORD_SIZE) INTEL_ALT_MANU,(unsigned short) ((unsigned long) FLASH_MAN_INTEL >> 16)}
108 static const map_entry chip_map[] =
110 {AMD_ID_F040B, FLASH_AM040},
111 {(FLASH_WORD_SIZE) STM_ID_x800AB, FLASH_STM800AB}
115 unsigned long result = FLASH_UNKNOWN;
118 for(p = &chip_map[0]; p < &chip_map[sizeof chip_map / sizeof chip_map[0]]; p++)
119 if(p->extval == chip)
121 result = FLASH_VENDMASK | p->intval;
126 for(p = &mfct_map[0]; p < &mfct_map[sizeof mfct_map / sizeof mfct_map[0]]; p++)
127 if(p->extval == mfct)
129 result &= ~FLASH_VENDMASK;
130 result |= (unsigned long) p->intval << 16;
143 static const ulong flash_banks[] = CFG_FLASH_BANKS;
145 /* Init: no FLASHes known */
146 for (i = 0; i < CFG_MAX_FLASH_BANKS; i++)
148 flash_info_t * const pflinfo = &flash_info[i];
149 pflinfo->flash_id = FLASH_UNKNOWN;
151 pflinfo->sector_count = 0;
154 /* Enable writes to Sandpoint flash */
156 register unsigned char temp;
157 CONFIG_READ_BYTE(CFG_WINBOND_ISA_CFG_ADDR + WINBOND_CSCR, temp);
158 temp &= ~0x20; /* clear BIOSWP bit */
159 CONFIG_WRITE_BYTE(CFG_WINBOND_ISA_CFG_ADDR + WINBOND_CSCR, temp);
162 for(i = 0; i < sizeof flash_banks / sizeof flash_banks[0]; i++)
164 flash_info_t * const pflinfo = &flash_info[i];
165 const unsigned long base_address = flash_banks[i];
166 volatile FLASH_WORD_SIZE * const flash = (FLASH_WORD_SIZE *) base_address;
168 volatile FLASH_WORD_SIZE * addr2;
171 /* write autoselect sequence */
172 flash[0x5555] = 0xaa;
173 flash[0x2aaa] = 0x55;
174 flash[0x5555] = 0x90;
176 flash[0xAAA << (3 * i)] = 0xaa;
177 flash[0x555 << (3 * i)] = 0x55;
178 flash[0xAAA << (3 * i)] = 0x90;
180 __asm__ __volatile__("sync");
183 pflinfo->flash_id = flash_id(flash[0x0], flash[0x1]);
185 pflinfo->flash_id = flash_id(flash[0x0], flash[0x2 + 14 * i]);
188 switch(pflinfo->flash_id & FLASH_TYPEMASK)
191 pflinfo->size = 0x00080000;
192 pflinfo->sector_count = 8;
193 for(j = 0; j < 8; j++)
195 pflinfo->start[j] = base_address + 0x00010000 * j;
196 pflinfo->protect[j] = flash[(j << 16) | 0x2];
200 pflinfo->size = 0x00100000;
201 pflinfo->sector_count = 19;
202 pflinfo->start[0] = base_address;
203 pflinfo->start[1] = base_address + 0x4000;
204 pflinfo->start[2] = base_address + 0x6000;
205 pflinfo->start[3] = base_address + 0x8000;
206 for(j = 1; j < 16; j++)
208 pflinfo->start[j+3] = base_address + 0x00010000 * j;
211 /* check for protected sectors */
212 for (j = 0; j < pflinfo->sector_count; j++) {
213 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
214 /* D0 = 1 if protected */
215 addr2 = (volatile FLASH_WORD_SIZE *)(pflinfo->start[j]);
216 if (pflinfo->flash_id & FLASH_MAN_SST)
217 pflinfo->protect[j] = 0;
219 pflinfo->protect[j] = addr2[2] & 1;
224 /* Protect monitor and environment sectors
226 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
227 flash_protect(FLAG_PROTECT_SET,
229 CFG_MONITOR_BASE + monitor_flash_len - 1,
233 #if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
234 flash_protect(FLAG_PROTECT_SET,
236 CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
240 /* reset device to read mode */
241 flash[0x0000] = 0xf0;
242 __asm__ __volatile__("sync");
245 return flash_info[0].size + flash_info[1].size;
250 flash_get_offsets (ulong base, flash_info_t *info)
254 /* set up sector start address table */
255 if (info->flash_id & FLASH_MAN_SST)
257 for (i = 0; i < info->sector_count; i++)
258 info->start[i] = base + (i * 0x00010000);
261 if (info->flash_id & FLASH_BTYPE) {
262 /* set sector offsets for bottom boot block type */
263 info->start[0] = base + 0x00000000;
264 info->start[1] = base + 0x00004000;
265 info->start[2] = base + 0x00006000;
266 info->start[3] = base + 0x00008000;
267 for (i = 4; i < info->sector_count; i++) {
268 info->start[i] = base + (i * 0x00010000) - 0x00030000;
271 /* set sector offsets for top boot block type */
272 i = info->sector_count - 1;
273 info->start[i--] = base + info->size - 0x00004000;
274 info->start[i--] = base + info->size - 0x00006000;
275 info->start[i--] = base + info->size - 0x00008000;
276 for (; i >= 0; i--) {
277 info->start[i] = base + i * 0x00010000;
284 /*-----------------------------------------------------------------------
287 flash_print_info(flash_info_t *info)
289 static const char unk[] = "Unknown";
290 const char *mfct = unk, *type = unk;
293 if(info->flash_id != FLASH_UNKNOWN)
295 switch(info->flash_id & FLASH_VENDMASK)
297 case FLASH_MAN_AMD: mfct = "AMD"; break;
298 case FLASH_MAN_FUJ: mfct = "FUJITSU"; break;
299 case FLASH_MAN_STM: mfct = "STM"; break;
300 case FLASH_MAN_SST: mfct = "SST"; break;
301 case FLASH_MAN_BM: mfct = "Bright Microelectonics"; break;
302 case FLASH_MAN_INTEL: mfct = "Intel"; break;
305 switch(info->flash_id & FLASH_TYPEMASK)
307 case FLASH_AM040: type = "AM29F040B (512K * 8, uniform sector size)"; break;
308 case FLASH_AM400B: type = "AM29LV400B (4 Mbit, bottom boot sect)"; break;
309 case FLASH_AM400T: type = "AM29LV400T (4 Mbit, top boot sector)"; break;
310 case FLASH_AM800B: type = "AM29LV800B (8 Mbit, bottom boot sect)"; break;
311 case FLASH_AM800T: type = "AM29LV800T (8 Mbit, top boot sector)"; break;
312 case FLASH_AM160T: type = "AM29LV160T (16 Mbit, top boot sector)"; break;
313 case FLASH_AM320B: type = "AM29LV320B (32 Mbit, bottom boot sect)"; break;
314 case FLASH_AM320T: type = "AM29LV320T (32 Mbit, top boot sector)"; break;
315 case FLASH_STM800AB: type = "M29W800AB (8 Mbit, bottom boot sect)"; break;
316 case FLASH_SST800A: type = "SST39LF/VF800 (8 Mbit, uniform sector size)"; break;
317 case FLASH_SST160A: type = "SST39LF/VF160 (16 Mbit, uniform sector size)"; break;
322 "\n Brand: %s Type: %s\n"
323 " Size: %lu KB in %d Sectors\n",
330 printf (" Sector Start Addresses:");
332 for (i = 0; i < info->sector_count; i++)
336 unsigned long * flash = (unsigned long *) info->start[i];
339 * Check if whole sector is erased
342 (i != (info->sector_count - 1)) ?
343 (info->start[i + 1] - info->start[i]) >> 2 :
344 (info->start[0] + info->size - info->start[i]) >> 2;
347 flash = (unsigned long *) info->start[i], erased = 1;
348 (flash != (unsigned long *) info->start[i] + size) && erased;
351 erased = *flash == ~0x0UL;
355 (i % 5) ? "" : "\n ",
358 info->protect[i] ? "RO" : " "
369 * The following code cannot be run from FLASH!
372 flash_get_size (vu_long *addr, flash_info_t *info)
375 FLASH_WORD_SIZE value;
376 ulong base = (ulong)addr;
377 volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;
379 printf("flash_get_size: \n");
380 /* Write auto select command: read Manufacturer ID */
382 addr2[ADDR0] = (FLASH_WORD_SIZE)0xAA;
383 addr2[ADDR1] = (FLASH_WORD_SIZE)0x55;
384 addr2[ADDR0] = (FLASH_WORD_SIZE)0x90;
388 case (FLASH_WORD_SIZE)AMD_MANUFACT:
389 info->flash_id = FLASH_MAN_AMD;
391 case (FLASH_WORD_SIZE)FUJ_MANUFACT:
392 info->flash_id = FLASH_MAN_FUJ;
394 case (FLASH_WORD_SIZE)SST_MANUFACT:
395 info->flash_id = FLASH_MAN_SST;
398 info->flash_id = FLASH_UNKNOWN;
399 info->sector_count = 0;
401 return (0); /* no or unknown flash */
403 printf("recognised manufacturer");
405 value = addr2[ADDR3]; /* device ID */
406 debug ("\ndev_code=%x\n", value);
409 case (FLASH_WORD_SIZE)AMD_ID_LV400T:
410 info->flash_id += FLASH_AM400T;
411 info->sector_count = 11;
412 info->size = 0x00080000;
413 break; /* => 0.5 MB */
415 case (FLASH_WORD_SIZE)AMD_ID_LV400B:
416 info->flash_id += FLASH_AM400B;
417 info->sector_count = 11;
418 info->size = 0x00080000;
419 break; /* => 0.5 MB */
421 case (FLASH_WORD_SIZE)AMD_ID_LV800T:
422 info->flash_id += FLASH_AM800T;
423 info->sector_count = 19;
424 info->size = 0x00100000;
427 case (FLASH_WORD_SIZE)AMD_ID_LV800B:
428 info->flash_id += FLASH_AM800B;
429 info->sector_count = 19;
430 info->size = 0x00100000;
433 case (FLASH_WORD_SIZE)AMD_ID_LV160T:
434 info->flash_id += FLASH_AM160T;
435 info->sector_count = 35;
436 info->size = 0x00200000;
439 case (FLASH_WORD_SIZE)AMD_ID_LV160B:
440 info->flash_id += FLASH_AM160B;
441 info->sector_count = 35;
442 info->size = 0x00200000;
445 case (FLASH_WORD_SIZE)SST_ID_xF800A:
446 info->flash_id += FLASH_SST800A;
447 info->sector_count = 16;
448 info->size = 0x00100000;
451 case (FLASH_WORD_SIZE)SST_ID_xF160A:
452 info->flash_id += FLASH_SST160A;
453 info->sector_count = 32;
454 info->size = 0x00200000;
457 case (FLASH_WORD_SIZE)AMD_ID_F040B:
458 info->flash_id += FLASH_AM040;
459 info->sector_count = 8;
460 info->size = 0x00080000;
461 break; /* => 0.5 MB */
464 info->flash_id = FLASH_UNKNOWN;
465 return (0); /* => no or unknown flash */
469 printf("flash id %lx; sector count %x, size %lx\n", info->flash_id,info->sector_count,info->size);
470 /* set up sector start address table */
471 if (info->flash_id & FLASH_MAN_SST)
473 for (i = 0; i < info->sector_count; i++)
474 info->start[i] = base + (i * 0x00010000);
477 if (info->flash_id & FLASH_BTYPE) {
478 /* set sector offsets for bottom boot block type */
479 info->start[0] = base + 0x00000000;
480 info->start[1] = base + 0x00004000;
481 info->start[2] = base + 0x00006000;
482 info->start[3] = base + 0x00008000;
483 for (i = 4; i < info->sector_count; i++) {
484 info->start[i] = base + (i * 0x00010000) - 0x00030000;
487 /* set sector offsets for top boot block type */
488 i = info->sector_count - 1;
489 info->start[i--] = base + info->size - 0x00004000;
490 info->start[i--] = base + info->size - 0x00006000;
491 info->start[i--] = base + info->size - 0x00008000;
492 for (; i >= 0; i--) {
493 info->start[i] = base + i * 0x00010000;
497 /* check for protected sectors */
498 for (i = 0; i < info->sector_count; i++) {
499 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
500 /* D0 = 1 if protected */
501 addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
502 if (info->flash_id & FLASH_MAN_SST)
503 info->protect[i] = 0;
505 info->protect[i] = addr2[2] & 1;
509 * Prevent writes to uninitialized FLASH.
511 if (info->flash_id != FLASH_UNKNOWN) {
512 addr2 = (FLASH_WORD_SIZE *)info->start[0];
513 *addr2 = (FLASH_WORD_SIZE)0x00F000F0; /* reset bank */
523 flash_erase(flash_info_t *info, int s_first, int s_last)
525 volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
526 int flag, prot, sect, l_sect;
527 ulong start, now, last;
530 if ((s_first < 0) || (s_first > s_last)) {
531 if (info->flash_id == FLASH_UNKNOWN) {
532 printf ("- missing\n");
534 printf ("- no sectors to erase\n");
539 if ((info->flash_id == FLASH_UNKNOWN) ||
540 (info->flash_id > (FLASH_MAN_STM | FLASH_AMD_COMP))) {
541 printf ("Can't erase unknown flash type - aborted\n");
546 for (sect=s_first; sect<=s_last; ++sect) {
547 if (info->protect[sect]) {
553 printf ("- Warning: %d protected sectors will not be erased!\n",
561 /* Check the ROM CS */
562 if ((info->start[0] >= ROM_CS1_START) && (info->start[0] < ROM_CS0_START))
567 /* Disable interrupts which might cause a timeout here */
568 flag = disable_interrupts();
570 addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
571 addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
572 addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00800080;
573 addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
574 addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
576 /* Start erase on unprotected sectors */
577 for (sect = s_first; sect<=s_last; sect++) {
578 if (info->protect[sect] == 0) { /* not protected */
579 addr = (FLASH_WORD_SIZE *)(info->start[0] + (
580 (info->start[sect] - info->start[0]) << sh8b));
581 if (info->flash_id & FLASH_MAN_SST)
583 addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
584 addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
585 addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00800080;
586 addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
587 addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
588 addr[0] = (FLASH_WORD_SIZE)0x00500050; /* block erase */
589 udelay(30000); /* wait 30 ms */
592 addr[0] = (FLASH_WORD_SIZE)0x00300030; /* sector erase */
597 /* re-enable interrupts if necessary */
601 /* wait at least 80us - let's wait 1 ms */
605 * We wait for the last triggered sector
610 start = get_timer (0);
612 addr = (FLASH_WORD_SIZE *)(info->start[0] + (
613 (info->start[l_sect] - info->start[0]) << sh8b));
614 while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
615 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
616 printf ("Timeout\n");
619 /* show that we're waiting */
620 if ((now - last) > 1000) { /* every second */
627 /* reset to read mode */
628 addr = (FLASH_WORD_SIZE *)info->start[0];
629 addr[0] = (FLASH_WORD_SIZE)0x00F000F0; /* reset bank */
635 /*-----------------------------------------------------------------------
636 * Copy memory to flash, returns:
639 * 2 - Flash not erased
642 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
647 wp = (addr & ~3); /* get lower word aligned address */
650 * handle unaligned start bytes
652 if ((l = addr - wp) != 0) {
654 for (i=0, cp=wp; i<l; ++i, ++cp) {
655 data = (data << 8) | (*(uchar *)cp);
657 for (; i<4 && cnt>0; ++i) {
658 data = (data << 8) | *src++;
662 for (; cnt==0 && i<4; ++i, ++cp) {
663 data = (data << 8) | (*(uchar *)cp);
666 if ((rc = write_word(info, wp, data)) != 0) {
673 * handle word aligned part
677 for (i=0; i<4; ++i) {
678 data = (data << 8) | *src++;
680 if ((rc = write_word(info, wp, data)) != 0) {
692 * handle unaligned tail bytes
695 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
696 data = (data << 8) | *src++;
699 for (; i<4; ++i, ++cp) {
700 data = (data << 8) | (*(uchar *)cp);
703 return (write_word(info, wp, data));
706 /*-----------------------------------------------------------------------
707 * Write a word to Flash, returns:
710 * 2 - Flash not erased
712 static int write_word (flash_info_t *info, ulong dest, ulong data)
714 volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)info->start[0];
715 volatile FLASH_WORD_SIZE *dest2;
716 volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data;
722 /* Check the ROM CS */
723 if ((info->start[0] >= ROM_CS1_START) && (info->start[0] < ROM_CS0_START))
728 dest2 = (FLASH_WORD_SIZE *)(((dest - info->start[0]) << sh8b) +
731 /* Check if Flash is (sufficiently) erased */
732 if ((*dest2 & (FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) {
735 /* Disable interrupts which might cause a timeout here */
736 flag = disable_interrupts();
738 for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++)
740 addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
741 addr2[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
742 addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00A000A0;
744 dest2[i << sh8b] = data2[i];
746 /* re-enable interrupts if necessary */
750 /* data polling for D7 */
751 start = get_timer (0);
752 while ((dest2[i << sh8b] & (FLASH_WORD_SIZE)0x00800080) !=
753 (data2[i] & (FLASH_WORD_SIZE)0x00800080)) {
754 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
763 /*-----------------------------------------------------------------------