2 * (C) Copyright 2000-2004
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 * Wait for completion of each sector erase command issued
28 * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
33 #include <asm/processor.h>
35 #if CONFIG_SYS_MAX_FLASH_BANKS != 1
36 #error "CONFIG_SYS_MAX_FLASH_BANKS must be 1"
38 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
40 /*-----------------------------------------------------------------------
43 static ulong flash_get_size (vu_long * addr, flash_info_t * info);
44 static int write_word (flash_info_t * info, ulong dest, ulong data);
45 static void flash_get_offsets (ulong base, flash_info_t * info);
49 #define FLASH_WORD_SIZE unsigned char
51 /*-----------------------------------------------------------------------
54 unsigned long flash_init (void)
56 unsigned long size_b0;
58 /* Init: no FLASHes known */
59 flash_info[0].flash_id = FLASH_UNKNOWN;
61 /* Static FLASH Bank configuration here - FIXME XXX */
63 size_b0 = flash_get_size ((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]);
65 if (flash_info[0].flash_id == FLASH_UNKNOWN) {
66 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
67 size_b0, size_b0 << 20);
72 flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);
74 /* Monitor protection ON by default */
75 (void) flash_protect (FLAG_PROTECT_SET,
77 FLASH_BASE0_PRELIM + monitor_flash_len - 1,
79 flash_info[0].size = size_b0;
85 /*-----------------------------------------------------------------------
87 static void flash_get_offsets (ulong base, flash_info_t * info)
91 /* set up sector start address table */
92 if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
93 (info->flash_id == FLASH_AM040)) {
94 for (i = 0; i < info->sector_count; i++)
95 info->start[i] = base + (i * 0x00010000);
97 if (info->flash_id & FLASH_BTYPE) {
98 /* set sector offsets for bottom boot block type */
99 info->start[0] = base + 0x00000000;
100 info->start[1] = base + 0x00004000;
101 info->start[2] = base + 0x00006000;
102 info->start[3] = base + 0x00008000;
103 for (i = 4; i < info->sector_count; i++) {
105 base + (i * 0x00010000) - 0x00030000;
108 /* set sector offsets for top boot block type */
109 i = info->sector_count - 1;
110 info->start[i--] = base + info->size - 0x00004000;
111 info->start[i--] = base + info->size - 0x00006000;
112 info->start[i--] = base + info->size - 0x00008000;
113 for (; i >= 0; i--) {
114 info->start[i] = base + i * 0x00010000;
120 /*-----------------------------------------------------------------------
122 void flash_print_info (flash_info_t * info)
128 volatile unsigned long *flash;
130 if (info->flash_id == FLASH_UNKNOWN) {
131 printf ("missing or unknown FLASH type\n");
135 switch (info->flash_id & FLASH_VENDMASK) {
146 printf ("Unknown Vendor ");
150 switch (info->flash_id & FLASH_TYPEMASK) {
152 printf ("AM29F040 (512 Kbit, uniform sector size)\n");
155 printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
158 printf ("AM29LV400T (4 Mbit, top boot sector)\n");
161 printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
164 printf ("AM29LV800T (8 Mbit, top boot sector)\n");
167 printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
170 printf ("AM29LV160T (16 Mbit, top boot sector)\n");
173 printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
176 printf ("AM29LV320T (32 Mbit, top boot sector)\n");
179 printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
182 printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
185 printf ("Unknown Chip Type\n");
189 printf (" Size: %ld KB in %d Sectors\n",
190 info->size >> 10, info->sector_count);
192 printf (" Sector Start Addresses:");
193 for (i = 0; i < info->sector_count; ++i) {
195 * Check if whole sector is erased
197 if (i != (info->sector_count - 1))
198 size = info->start[i + 1] - info->start[i];
200 size = info->start[0] + info->size - info->start[i];
202 flash = (volatile unsigned long *) info->start[i];
203 size = size >> 2; /* divide by 4 for longword access */
204 for (k = 0; k < size; k++) {
205 if (*flash++ != 0xffffffff) {
213 printf (" %08lX%s%s",
215 erased ? " E" : " ", info->protect[i] ? "RO " : " "
222 /*-----------------------------------------------------------------------
226 /*-----------------------------------------------------------------------
230 * The following code cannot be run from FLASH!
232 static ulong flash_get_size (vu_long * addr, flash_info_t * info)
235 FLASH_WORD_SIZE value;
236 ulong base = (ulong) addr;
237 volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) addr;
239 /* Write auto select command: read Manufacturer ID */
240 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
241 addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
242 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00900090;
247 case (FLASH_WORD_SIZE) AMD_MANUFACT:
248 info->flash_id = FLASH_MAN_AMD;
250 case (FLASH_WORD_SIZE) FUJ_MANUFACT:
251 info->flash_id = FLASH_MAN_FUJ;
253 case (FLASH_WORD_SIZE) SST_MANUFACT:
254 info->flash_id = FLASH_MAN_SST;
257 info->flash_id = FLASH_UNKNOWN;
258 info->sector_count = 0;
260 return (0); /* no or unknown flash */
263 value = addr2[1]; /* device ID */
266 case (FLASH_WORD_SIZE) AMD_ID_F040B:
267 info->flash_id += FLASH_AM040;
268 info->sector_count = 8;
269 info->size = 0x0080000; /* => 512 ko */
271 case (FLASH_WORD_SIZE) AMD_ID_LV040B:
272 info->flash_id += FLASH_AM040;
273 info->sector_count = 8;
274 info->size = 0x0080000; /* => 512 ko */
276 case (FLASH_WORD_SIZE) AMD_ID_LV400T:
277 info->flash_id += FLASH_AM400T;
278 info->sector_count = 11;
279 info->size = 0x00080000;
280 break; /* => 0.5 MB */
282 case (FLASH_WORD_SIZE) AMD_ID_LV400B:
283 info->flash_id += FLASH_AM400B;
284 info->sector_count = 11;
285 info->size = 0x00080000;
286 break; /* => 0.5 MB */
288 case (FLASH_WORD_SIZE) AMD_ID_LV800T:
289 info->flash_id += FLASH_AM800T;
290 info->sector_count = 19;
291 info->size = 0x00100000;
294 case (FLASH_WORD_SIZE) AMD_ID_LV800B:
295 info->flash_id += FLASH_AM800B;
296 info->sector_count = 19;
297 info->size = 0x00100000;
300 case (FLASH_WORD_SIZE) AMD_ID_LV160T:
301 info->flash_id += FLASH_AM160T;
302 info->sector_count = 35;
303 info->size = 0x00200000;
306 case (FLASH_WORD_SIZE) AMD_ID_LV160B:
307 info->flash_id += FLASH_AM160B;
308 info->sector_count = 35;
309 info->size = 0x00200000;
311 #if 0 /* enable when device IDs are available */
312 case (FLASH_WORD_SIZE) AMD_ID_LV320T:
313 info->flash_id += FLASH_AM320T;
314 info->sector_count = 67;
315 info->size = 0x00400000;
318 case (FLASH_WORD_SIZE) AMD_ID_LV320B:
319 info->flash_id += FLASH_AM320B;
320 info->sector_count = 67;
321 info->size = 0x00400000;
324 case (FLASH_WORD_SIZE) SST_ID_xF800A:
325 info->flash_id += FLASH_SST800A;
326 info->sector_count = 16;
327 info->size = 0x00100000;
330 case (FLASH_WORD_SIZE) SST_ID_xF160A:
331 info->flash_id += FLASH_SST160A;
332 info->sector_count = 32;
333 info->size = 0x00200000;
337 info->flash_id = FLASH_UNKNOWN;
338 return (0); /* => no or unknown flash */
342 /* set up sector start address table */
343 if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
344 (info->flash_id == FLASH_AM040)) {
345 for (i = 0; i < info->sector_count; i++)
346 info->start[i] = base + (i * 0x00010000);
348 if (info->flash_id & FLASH_BTYPE) {
349 /* set sector offsets for bottom boot block type */
350 info->start[0] = base + 0x00000000;
351 info->start[1] = base + 0x00004000;
352 info->start[2] = base + 0x00006000;
353 info->start[3] = base + 0x00008000;
354 for (i = 4; i < info->sector_count; i++) {
356 base + (i * 0x00010000) - 0x00030000;
359 /* set sector offsets for top boot block type */
360 i = info->sector_count - 1;
361 info->start[i--] = base + info->size - 0x00004000;
362 info->start[i--] = base + info->size - 0x00006000;
363 info->start[i--] = base + info->size - 0x00008000;
364 for (; i >= 0; i--) {
365 info->start[i] = base + i * 0x00010000;
370 /* check for protected sectors */
371 for (i = 0; i < info->sector_count; i++) {
372 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
373 /* D0 = 1 if protected */
374 addr2 = (volatile FLASH_WORD_SIZE *) (info->start[i]);
375 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
376 info->protect[i] = 0;
378 info->protect[i] = addr2[2] & 1;
382 * Prevent writes to uninitialized FLASH.
384 if (info->flash_id != FLASH_UNKNOWN) {
385 addr2 = (FLASH_WORD_SIZE *) info->start[0];
386 *addr2 = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
392 int wait_for_DQ7 (flash_info_t * info, int sect)
394 ulong start, now, last;
395 volatile FLASH_WORD_SIZE *addr =
396 (FLASH_WORD_SIZE *) (info->start[sect]);
398 start = get_timer (0);
400 while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) !=
401 (FLASH_WORD_SIZE) 0x00800080) {
402 if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
403 printf ("Timeout\n");
406 /* show that we're waiting */
407 if ((now - last) > 1000) { /* every second */
415 /*-----------------------------------------------------------------------
418 int flash_erase (flash_info_t * info, int s_first, int s_last)
420 volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]);
421 volatile FLASH_WORD_SIZE *addr2;
422 int flag, prot, sect, l_sect;
425 if ((s_first < 0) || (s_first > s_last)) {
426 if (info->flash_id == FLASH_UNKNOWN) {
427 printf ("- missing\n");
429 printf ("- no sectors to erase\n");
434 if (info->flash_id == FLASH_UNKNOWN) {
435 printf ("Can't erase unknown flash type - aborted\n");
440 for (sect = s_first; sect <= s_last; ++sect) {
441 if (info->protect[sect]) {
447 printf ("- Warning: %d protected sectors will not be erased!\n", prot);
454 /* Disable interrupts which might cause a timeout here */
455 flag = disable_interrupts ();
457 /* Start erase on unprotected sectors */
458 for (sect = s_first; sect <= s_last; sect++) {
459 if (info->protect[sect] == 0) { /* not protected */
460 addr2 = (FLASH_WORD_SIZE *) (info->start[sect]);
461 printf ("Erasing sector %p\n", addr2); /* CLH */
463 if ((info->flash_id & FLASH_VENDMASK) ==
465 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
466 addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
467 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
468 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
469 addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
470 addr2[0] = (FLASH_WORD_SIZE) 0x00500050; /* block erase */
471 for (i = 0; i < 50; i++)
472 udelay (1000); /* wait 1 ms */
474 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
475 addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
476 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
477 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
478 addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
479 addr2[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */
483 * Wait for each sector to complete, it's more
484 * reliable. According to AMD Spec, you must
485 * issue all erase commands within a specified
486 * timeout. This has been seen to fail, especially
487 * if printf()s are included (for debug)!!
489 wait_for_DQ7 (info, sect);
493 /* re-enable interrupts if necessary */
495 enable_interrupts ();
497 /* wait at least 80us - let's wait 1 ms */
502 * We wait for the last triggered sector
506 wait_for_DQ7 (info, l_sect);
510 /* reset to read mode */
511 addr = (FLASH_WORD_SIZE *) info->start[0];
512 addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
518 /*-----------------------------------------------------------------------
519 * Copy memory to flash, returns:
522 * 2 - Flash not erased
525 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
530 wp = (addr & ~3); /* get lower word aligned address */
533 * handle unaligned start bytes
535 if ((l = addr - wp) != 0) {
537 for (i = 0, cp = wp; i < l; ++i, ++cp) {
538 data = (data << 8) | (*(uchar *) cp);
540 for (; i < 4 && cnt > 0; ++i) {
541 data = (data << 8) | *src++;
545 for (; cnt == 0 && i < 4; ++i, ++cp) {
546 data = (data << 8) | (*(uchar *) cp);
549 if ((rc = write_word (info, wp, data)) != 0) {
556 * handle word aligned part
560 for (i = 0; i < 4; ++i) {
561 data = (data << 8) | *src++;
563 if ((rc = write_word (info, wp, data)) != 0) {
575 * handle unaligned tail bytes
578 for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
579 data = (data << 8) | *src++;
582 for (; i < 4; ++i, ++cp) {
583 data = (data << 8) | (*(uchar *) cp);
586 return (write_word (info, wp, data));
589 /*-----------------------------------------------------------------------
590 * Write a word to Flash, returns:
593 * 2 - Flash not erased
595 static int write_word (flash_info_t * info, ulong dest, ulong data)
597 volatile FLASH_WORD_SIZE *addr2 =
598 (FLASH_WORD_SIZE *) (info->start[0]);
599 volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *) dest;
600 volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
604 /* Check if Flash is (sufficiently) erased */
605 if ((*((volatile FLASH_WORD_SIZE *) dest) &
606 (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
610 for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
613 /* Disable interrupts which might cause a timeout here */
614 flag = disable_interrupts ();
616 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
617 addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
618 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0;
622 /* re-enable interrupts if necessary */
624 enable_interrupts ();
626 /* data polling for D7 */
627 start = get_timer (0);
628 while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) !=
629 (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
631 if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {