3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
10 #include <asm/processor.h>
11 #include <asm/pci_io.h>
14 #define ROM_CS0_START 0xFF800000
15 #define ROM_CS1_START 0xFF000000
17 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
19 #if defined(CONFIG_ENV_IS_IN_FLASH)
20 # ifndef CONFIG_ENV_ADDR
21 # define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
23 # ifndef CONFIG_ENV_SIZE
24 # define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
26 # ifndef CONFIG_ENV_SECT_SIZE
27 # define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
31 /*-----------------------------------------------------------------------
34 static int write_word (flash_info_t *info, ulong dest, ulong data);
36 static void flash_get_offsets (ulong base, flash_info_t *info);
39 /*flash command address offsets*/
51 #define FLASH_WORD_SIZE unsigned char
53 /*-----------------------------------------------------------------------
57 static int byte_parity_odd(unsigned char x) __attribute__ ((const));
59 static unsigned long flash_id(unsigned char mfct, unsigned char chip) __attribute__ ((const));
63 FLASH_WORD_SIZE extval;
64 unsigned short intval;
69 byte_parity_odd(unsigned char x)
74 return (x & 0x1) != 0;
80 flash_id(unsigned char mfct, unsigned char chip)
82 static const map_entry mfct_map[] =
84 {(FLASH_WORD_SIZE) AMD_MANUFACT, (unsigned short) ((unsigned long) FLASH_MAN_AMD >> 16)},
85 {(FLASH_WORD_SIZE) FUJ_MANUFACT, (unsigned short) ((unsigned long) FLASH_MAN_FUJ >> 16)},
86 {(FLASH_WORD_SIZE) STM_MANUFACT, (unsigned short) ((unsigned long) FLASH_MAN_STM >> 16)},
87 {(FLASH_WORD_SIZE) MT_MANUFACT, (unsigned short) ((unsigned long) FLASH_MAN_MT >> 16)},
88 {(FLASH_WORD_SIZE) INTEL_MANUFACT,(unsigned short) ((unsigned long) FLASH_MAN_INTEL >> 16)},
89 {(FLASH_WORD_SIZE) INTEL_ALT_MANU,(unsigned short) ((unsigned long) FLASH_MAN_INTEL >> 16)}
92 static const map_entry chip_map[] =
94 {AMD_ID_F040B, FLASH_AM040},
95 {(FLASH_WORD_SIZE) STM_ID_x800AB, FLASH_STM800AB}
99 unsigned long result = FLASH_UNKNOWN;
102 for(p = &chip_map[0]; p < &chip_map[sizeof chip_map / sizeof chip_map[0]]; p++)
103 if(p->extval == chip)
105 result = FLASH_VENDMASK | p->intval;
110 for(p = &mfct_map[0]; p < &mfct_map[sizeof mfct_map / sizeof mfct_map[0]]; p++)
111 if(p->extval == mfct)
113 result &= ~FLASH_VENDMASK;
114 result |= (unsigned long) p->intval << 16;
127 static const ulong flash_banks[] = CONFIG_SYS_FLASH_BANKS;
129 /* Init: no FLASHes known */
130 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++)
132 flash_info_t * const pflinfo = &flash_info[i];
133 pflinfo->flash_id = FLASH_UNKNOWN;
135 pflinfo->sector_count = 0;
138 /* Enable writes to Sandpoint flash */
140 register unsigned char temp;
141 CONFIG_READ_BYTE(CONFIG_SYS_WINBOND_ISA_CFG_ADDR + WINBOND_CSCR, temp);
142 temp &= ~0x20; /* clear BIOSWP bit */
143 CONFIG_WRITE_BYTE(CONFIG_SYS_WINBOND_ISA_CFG_ADDR + WINBOND_CSCR, temp);
146 for(i = 0; i < sizeof flash_banks / sizeof flash_banks[0]; i++)
148 flash_info_t * const pflinfo = &flash_info[i];
149 const unsigned long base_address = flash_banks[i];
150 volatile FLASH_WORD_SIZE * const flash = (FLASH_WORD_SIZE *) base_address;
152 volatile FLASH_WORD_SIZE * addr2;
155 /* write autoselect sequence */
156 flash[0x5555] = 0xaa;
157 flash[0x2aaa] = 0x55;
158 flash[0x5555] = 0x90;
160 flash[0xAAA << (3 * i)] = 0xaa;
161 flash[0x555 << (3 * i)] = 0x55;
162 flash[0xAAA << (3 * i)] = 0x90;
164 __asm__ __volatile__("sync");
167 pflinfo->flash_id = flash_id(flash[0x0], flash[0x1]);
169 pflinfo->flash_id = flash_id(flash[0x0], flash[0x2 + 14 * i]);
172 switch(pflinfo->flash_id & FLASH_TYPEMASK)
175 pflinfo->size = 0x00080000;
176 pflinfo->sector_count = 8;
177 for(j = 0; j < 8; j++)
179 pflinfo->start[j] = base_address + 0x00010000 * j;
180 pflinfo->protect[j] = flash[(j << 16) | 0x2];
184 pflinfo->size = 0x00100000;
185 pflinfo->sector_count = 19;
186 pflinfo->start[0] = base_address;
187 pflinfo->start[1] = base_address + 0x4000;
188 pflinfo->start[2] = base_address + 0x6000;
189 pflinfo->start[3] = base_address + 0x8000;
190 for(j = 1; j < 16; j++)
192 pflinfo->start[j+3] = base_address + 0x00010000 * j;
195 /* check for protected sectors */
196 for (j = 0; j < pflinfo->sector_count; j++) {
197 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
198 /* D0 = 1 if protected */
199 addr2 = (volatile FLASH_WORD_SIZE *)(pflinfo->start[j]);
200 if (pflinfo->flash_id & FLASH_MAN_SST)
201 pflinfo->protect[j] = 0;
203 pflinfo->protect[j] = addr2[2] & 1;
208 /* Protect monitor and environment sectors
210 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
211 flash_protect(FLAG_PROTECT_SET,
212 CONFIG_SYS_MONITOR_BASE,
213 CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
217 #if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
218 flash_protect(FLAG_PROTECT_SET,
220 CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
224 /* reset device to read mode */
225 flash[0x0000] = 0xf0;
226 __asm__ __volatile__("sync");
229 return flash_info[0].size + flash_info[1].size;
234 flash_get_offsets (ulong base, flash_info_t *info)
238 /* set up sector start address table */
239 if (info->flash_id & FLASH_MAN_SST)
241 for (i = 0; i < info->sector_count; i++)
242 info->start[i] = base + (i * 0x00010000);
245 if (info->flash_id & FLASH_BTYPE) {
246 /* set sector offsets for bottom boot block type */
247 info->start[0] = base + 0x00000000;
248 info->start[1] = base + 0x00004000;
249 info->start[2] = base + 0x00006000;
250 info->start[3] = base + 0x00008000;
251 for (i = 4; i < info->sector_count; i++) {
252 info->start[i] = base + (i * 0x00010000) - 0x00030000;
255 /* set sector offsets for top boot block type */
256 i = info->sector_count - 1;
257 info->start[i--] = base + info->size - 0x00004000;
258 info->start[i--] = base + info->size - 0x00006000;
259 info->start[i--] = base + info->size - 0x00008000;
260 for (; i >= 0; i--) {
261 info->start[i] = base + i * 0x00010000;
268 /*-----------------------------------------------------------------------
271 flash_print_info(flash_info_t *info)
273 static const char unk[] = "Unknown";
274 const char *mfct = unk, *type = unk;
277 if(info->flash_id != FLASH_UNKNOWN)
279 switch(info->flash_id & FLASH_VENDMASK)
281 case FLASH_MAN_AMD: mfct = "AMD"; break;
282 case FLASH_MAN_FUJ: mfct = "FUJITSU"; break;
283 case FLASH_MAN_STM: mfct = "STM"; break;
284 case FLASH_MAN_SST: mfct = "SST"; break;
285 case FLASH_MAN_BM: mfct = "Bright Microelectonics"; break;
286 case FLASH_MAN_INTEL: mfct = "Intel"; break;
289 switch(info->flash_id & FLASH_TYPEMASK)
291 case FLASH_AM040: type = "AM29F040B (512K * 8, uniform sector size)"; break;
292 case FLASH_AM400B: type = "AM29LV400B (4 Mbit, bottom boot sect)"; break;
293 case FLASH_AM400T: type = "AM29LV400T (4 Mbit, top boot sector)"; break;
294 case FLASH_AM800B: type = "AM29LV800B (8 Mbit, bottom boot sect)"; break;
295 case FLASH_AM800T: type = "AM29LV800T (8 Mbit, top boot sector)"; break;
296 case FLASH_AM160T: type = "AM29LV160T (16 Mbit, top boot sector)"; break;
297 case FLASH_AM320B: type = "AM29LV320B (32 Mbit, bottom boot sect)"; break;
298 case FLASH_AM320T: type = "AM29LV320T (32 Mbit, top boot sector)"; break;
299 case FLASH_STM800AB: type = "M29W800AB (8 Mbit, bottom boot sect)"; break;
300 case FLASH_SST800A: type = "SST39LF/VF800 (8 Mbit, uniform sector size)"; break;
301 case FLASH_SST160A: type = "SST39LF/VF160 (16 Mbit, uniform sector size)"; break;
306 "\n Brand: %s Type: %s\n"
307 " Size: %lu KB in %d Sectors\n",
314 printf (" Sector Start Addresses:");
316 for (i = 0; i < info->sector_count; i++)
320 unsigned long * flash = (unsigned long *) info->start[i];
323 * Check if whole sector is erased
326 (i != (info->sector_count - 1)) ?
327 (info->start[i + 1] - info->start[i]) >> 2 :
328 (info->start[0] + info->size - info->start[i]) >> 2;
331 flash = (unsigned long *) info->start[i], erased = 1;
332 (flash != (unsigned long *) info->start[i] + size) && erased;
335 erased = *flash == ~0x0UL;
339 (i % 5) ? "" : "\n ",
342 info->protect[i] ? "RO" : " "
353 * The following code cannot be run from FLASH!
356 flash_get_size (vu_long *addr, flash_info_t *info)
359 FLASH_WORD_SIZE value;
360 ulong base = (ulong)addr;
361 volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;
363 printf("flash_get_size: \n");
364 /* Write auto select command: read Manufacturer ID */
366 addr2[ADDR0] = (FLASH_WORD_SIZE)0xAA;
367 addr2[ADDR1] = (FLASH_WORD_SIZE)0x55;
368 addr2[ADDR0] = (FLASH_WORD_SIZE)0x90;
372 case (FLASH_WORD_SIZE)AMD_MANUFACT:
373 info->flash_id = FLASH_MAN_AMD;
375 case (FLASH_WORD_SIZE)FUJ_MANUFACT:
376 info->flash_id = FLASH_MAN_FUJ;
378 case (FLASH_WORD_SIZE)SST_MANUFACT:
379 info->flash_id = FLASH_MAN_SST;
382 info->flash_id = FLASH_UNKNOWN;
383 info->sector_count = 0;
385 return (0); /* no or unknown flash */
387 printf("recognised manufacturer");
389 value = addr2[ADDR3]; /* device ID */
390 debug ("\ndev_code=%x\n", value);
393 case (FLASH_WORD_SIZE)AMD_ID_LV400T:
394 info->flash_id += FLASH_AM400T;
395 info->sector_count = 11;
396 info->size = 0x00080000;
397 break; /* => 0.5 MB */
399 case (FLASH_WORD_SIZE)AMD_ID_LV400B:
400 info->flash_id += FLASH_AM400B;
401 info->sector_count = 11;
402 info->size = 0x00080000;
403 break; /* => 0.5 MB */
405 case (FLASH_WORD_SIZE)AMD_ID_LV800T:
406 info->flash_id += FLASH_AM800T;
407 info->sector_count = 19;
408 info->size = 0x00100000;
411 case (FLASH_WORD_SIZE)AMD_ID_LV800B:
412 info->flash_id += FLASH_AM800B;
413 info->sector_count = 19;
414 info->size = 0x00100000;
417 case (FLASH_WORD_SIZE)AMD_ID_LV160T:
418 info->flash_id += FLASH_AM160T;
419 info->sector_count = 35;
420 info->size = 0x00200000;
423 case (FLASH_WORD_SIZE)AMD_ID_LV160B:
424 info->flash_id += FLASH_AM160B;
425 info->sector_count = 35;
426 info->size = 0x00200000;
429 case (FLASH_WORD_SIZE)SST_ID_xF800A:
430 info->flash_id += FLASH_SST800A;
431 info->sector_count = 16;
432 info->size = 0x00100000;
435 case (FLASH_WORD_SIZE)SST_ID_xF160A:
436 info->flash_id += FLASH_SST160A;
437 info->sector_count = 32;
438 info->size = 0x00200000;
441 case (FLASH_WORD_SIZE)AMD_ID_F040B:
442 info->flash_id += FLASH_AM040;
443 info->sector_count = 8;
444 info->size = 0x00080000;
445 break; /* => 0.5 MB */
448 info->flash_id = FLASH_UNKNOWN;
449 return (0); /* => no or unknown flash */
453 printf("flash id %lx; sector count %x, size %lx\n", info->flash_id,info->sector_count,info->size);
454 /* set up sector start address table */
455 if (info->flash_id & FLASH_MAN_SST)
457 for (i = 0; i < info->sector_count; i++)
458 info->start[i] = base + (i * 0x00010000);
461 if (info->flash_id & FLASH_BTYPE) {
462 /* set sector offsets for bottom boot block type */
463 info->start[0] = base + 0x00000000;
464 info->start[1] = base + 0x00004000;
465 info->start[2] = base + 0x00006000;
466 info->start[3] = base + 0x00008000;
467 for (i = 4; i < info->sector_count; i++) {
468 info->start[i] = base + (i * 0x00010000) - 0x00030000;
471 /* set sector offsets for top boot block type */
472 i = info->sector_count - 1;
473 info->start[i--] = base + info->size - 0x00004000;
474 info->start[i--] = base + info->size - 0x00006000;
475 info->start[i--] = base + info->size - 0x00008000;
476 for (; i >= 0; i--) {
477 info->start[i] = base + i * 0x00010000;
481 /* check for protected sectors */
482 for (i = 0; i < info->sector_count; i++) {
483 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
484 /* D0 = 1 if protected */
485 addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
486 if (info->flash_id & FLASH_MAN_SST)
487 info->protect[i] = 0;
489 info->protect[i] = addr2[2] & 1;
493 * Prevent writes to uninitialized FLASH.
495 if (info->flash_id != FLASH_UNKNOWN) {
496 addr2 = (FLASH_WORD_SIZE *)info->start[0];
497 *addr2 = (FLASH_WORD_SIZE)0x00F000F0; /* reset bank */
507 flash_erase(flash_info_t *info, int s_first, int s_last)
509 volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
510 int flag, prot, sect, l_sect;
511 ulong start, now, last;
514 if ((s_first < 0) || (s_first > s_last)) {
515 if (info->flash_id == FLASH_UNKNOWN) {
516 printf ("- missing\n");
518 printf ("- no sectors to erase\n");
523 if ((info->flash_id == FLASH_UNKNOWN) ||
524 (info->flash_id > (FLASH_MAN_STM | FLASH_AMD_COMP))) {
525 printf ("Can't erase unknown flash type - aborted\n");
530 for (sect=s_first; sect<=s_last; ++sect) {
531 if (info->protect[sect]) {
537 printf ("- Warning: %d protected sectors will not be erased!\n",
545 /* Check the ROM CS */
546 if ((info->start[0] >= ROM_CS1_START) && (info->start[0] < ROM_CS0_START))
551 /* Disable interrupts which might cause a timeout here */
552 flag = disable_interrupts();
554 addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
555 addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
556 addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00800080;
557 addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
558 addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
560 /* Start erase on unprotected sectors */
561 for (sect = s_first; sect<=s_last; sect++) {
562 if (info->protect[sect] == 0) { /* not protected */
563 addr = (FLASH_WORD_SIZE *)(info->start[0] + (
564 (info->start[sect] - info->start[0]) << sh8b));
565 if (info->flash_id & FLASH_MAN_SST)
567 addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
568 addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
569 addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00800080;
570 addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
571 addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
572 addr[0] = (FLASH_WORD_SIZE)0x00500050; /* block erase */
573 udelay(30000); /* wait 30 ms */
576 addr[0] = (FLASH_WORD_SIZE)0x00300030; /* sector erase */
581 /* re-enable interrupts if necessary */
585 /* wait at least 80us - let's wait 1 ms */
589 * We wait for the last triggered sector
594 start = get_timer (0);
596 addr = (FLASH_WORD_SIZE *)(info->start[0] + (
597 (info->start[l_sect] - info->start[0]) << sh8b));
598 while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
599 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
600 printf ("Timeout\n");
603 /* show that we're waiting */
604 if ((now - last) > 1000) { /* every second */
611 /* reset to read mode */
612 addr = (FLASH_WORD_SIZE *)info->start[0];
613 addr[0] = (FLASH_WORD_SIZE)0x00F000F0; /* reset bank */
619 /*-----------------------------------------------------------------------
620 * Copy memory to flash, returns:
623 * 2 - Flash not erased
626 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
631 wp = (addr & ~3); /* get lower word aligned address */
634 * handle unaligned start bytes
636 if ((l = addr - wp) != 0) {
638 for (i=0, cp=wp; i<l; ++i, ++cp) {
639 data = (data << 8) | (*(uchar *)cp);
641 for (; i<4 && cnt>0; ++i) {
642 data = (data << 8) | *src++;
646 for (; cnt==0 && i<4; ++i, ++cp) {
647 data = (data << 8) | (*(uchar *)cp);
650 if ((rc = write_word(info, wp, data)) != 0) {
657 * handle word aligned part
661 for (i=0; i<4; ++i) {
662 data = (data << 8) | *src++;
664 if ((rc = write_word(info, wp, data)) != 0) {
676 * handle unaligned tail bytes
679 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
680 data = (data << 8) | *src++;
683 for (; i<4; ++i, ++cp) {
684 data = (data << 8) | (*(uchar *)cp);
687 return (write_word(info, wp, data));
690 /*-----------------------------------------------------------------------
691 * Write a word to Flash, returns:
694 * 2 - Flash not erased
696 static int write_word (flash_info_t *info, ulong dest, ulong data)
698 volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)info->start[0];
699 volatile FLASH_WORD_SIZE *dest2;
700 volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data;
706 /* Check the ROM CS */
707 if ((info->start[0] >= ROM_CS1_START) && (info->start[0] < ROM_CS0_START))
712 dest2 = (FLASH_WORD_SIZE *)(((dest - info->start[0]) << sh8b) +
715 /* Check if Flash is (sufficiently) erased */
716 if ((*dest2 & (FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) {
719 /* Disable interrupts which might cause a timeout here */
720 flag = disable_interrupts();
722 for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++)
724 addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
725 addr2[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
726 addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00A000A0;
728 dest2[i << sh8b] = data2[i];
730 /* re-enable interrupts if necessary */
734 /* data polling for D7 */
735 start = get_timer (0);
736 while ((dest2[i << sh8b] & (FLASH_WORD_SIZE)0x00800080) !=
737 (data2[i] & (FLASH_WORD_SIZE)0x00800080)) {
738 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
747 /*-----------------------------------------------------------------------