3 * Gary Jennejohn, DENX Software Engineering, <gj@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,
27 #include <environment.h>
29 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
31 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
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
45 #define MEM_FLASH_ADDR (*(volatile u32 *)CFG_FLASH_BASE)
46 #define MEM_FLASH_ADDR1 (*(volatile u32 *)(CFG_FLASH_BASE + (0x00000555 << 2)))
47 #define MEM_FLASH_ADDR2 (*(volatile u32 *)(CFG_FLASH_BASE + (0x000002AA << 2)))
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 */
58 /*-----------------------------------------------------------------------
61 ulong flash_init (void)
66 for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
68 flash_info_t *info = &flash_info[i];
70 /* Init: no FLASHes known */
71 info->flash_id = FLASH_UNKNOWN;
73 size += flash_get_size (CFG_FLASH_BASE, info);
76 flashbase = CFG_FLASH_BASE;
78 panic ("configured too many flash banks!\n");
79 for (j = 0; j < info->sector_count; j++) {
82 info->start[j] = flashbase;
84 switch (info->flash_id & FLASH_TYPEMASK) {
85 case (FLASH_AM320B & FLASH_TYPEMASK):
86 /* Boot sector type: 8 x 8 + N x 128 kB */
87 flashbase += (j < 8) ? 0x4000 : 0x20000;
89 case (FLASH_AM640U & FLASH_TYPEMASK):
90 /* Uniform sector type: 128 kB */
94 printf ("## Bad flash chip type 0x%04lX\n",
95 info->flash_id & FLASH_TYPEMASK);
101 * Protect monitor and environment sectors
103 flash_protect ( FLAG_PROTECT_SET,
105 CFG_FLASH_BASE + monitor_flash_len - 1,
108 flash_protect ( FLAG_PROTECT_SET,
110 CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
112 #ifdef CFG_ENV_ADDR_REDUND
113 flash_protect ( FLAG_PROTECT_SET,
115 CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1,
122 /*-----------------------------------------------------------------------
124 void flash_print_info (flash_info_t * info)
128 switch (info->flash_id & FLASH_VENDMASK) {
129 case (FLASH_MAN_AMD & FLASH_VENDMASK):
130 printf ("AMD "); break;
131 case (FLASH_MAN_FUJ & FLASH_VENDMASK):
132 printf ("FUJITSU "); break;
133 default: printf ("Unknown Vendor "); break;
136 switch (info->flash_id & FLASH_TYPEMASK) {
137 case (FLASH_AM320B & FLASH_TYPEMASK):
138 printf ("2x Am29LV320DB (32Mbit)\n");
140 case (FLASH_AM640U & FLASH_TYPEMASK):
141 printf ("2x Am29LV640D (64Mbit)\n");
144 printf ("Unknown Chip Type\n");
149 printf (" Size: %ld MB in %d Sectors\n",
150 info->size >> 20, info->sector_count);
152 printf (" Sector Start Addresses:");
153 for (i = 0; i < info->sector_count; i++) {
159 info->protect[i] ? " (RO)" : " ");
166 /*-----------------------------------------------------------------------
169 int flash_erase (flash_info_t * info, int s_first, int s_last)
176 int iflag, prot, sect;
180 debug ("flash_erase: s_first %d s_last %d\n", s_first, s_last);
182 /* first look for protection bits */
184 if (info->flash_id == FLASH_UNKNOWN)
185 return ERR_UNKNOWN_FLASH_TYPE;
187 if ((s_first < 0) || (s_first > s_last)) {
191 switch (info->flash_id & FLASH_VENDMASK) {
192 case (FLASH_MAN_AMD & FLASH_VENDMASK): break; /* OK */
193 case (FLASH_MAN_FUJ & FLASH_VENDMASK): break; /* OK */
195 debug ("## flash_erase: unknown manufacturer\n");
196 return (ERR_UNKNOWN_FLASH_VENDOR);
200 for (sect = s_first; sect <= s_last; ++sect) {
201 if (info->protect[sect]) {
207 printf ("- Warning: %d protected sectors will not be erased!\n",
214 * Disable interrupts which might cause a timeout
215 * here. Remember that our exception vectors are
216 * at address 0 in the flash, and we don't want a
217 * (ticker) exception to happen while the flash
218 * chip is in programming mode.
221 cflag = icache_status ();
224 iflag = disable_interrupts ();
226 /* Start erase on unprotected sectors */
227 for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
229 debug ("Erasing sector %2d @ %08lX... ",
230 sect, info->start[sect]);
232 /* arm simple, non interrupt dependent timer */
233 reset_timer_masked ();
235 if (info->protect[sect] == 0) { /* not protected */
236 vu_long *addr = (vu_long *) (info->start[sect]);
238 MEM_FLASH_ADDR1 = CMD_UNLOCK1;
239 MEM_FLASH_ADDR2 = CMD_UNLOCK2;
240 MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
242 MEM_FLASH_ADDR1 = CMD_UNLOCK1;
243 MEM_FLASH_ADDR2 = CMD_UNLOCK2;
244 *addr = CMD_ERASE_CONFIRM;
246 /* wait until flash is ready */
253 if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
254 MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
259 if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE)
262 if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR)
265 if (!chip2 && (result >> 16) & BIT_ERASE_DONE)
268 if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR)
271 } while (!chip1 || !chip2);
273 MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
275 if (chip1 == ERR || chip2 == ERR) {
287 /* allow flash to settle - wait 10 ms */
288 udelay_masked (10000);
291 enable_interrupts ();
300 /*-----------------------------------------------------------------------
301 * Copy memory to flash
304 volatile static int write_word (flash_info_t * info, ulong dest,
307 vu_long *addr = (vu_long *) dest;
318 * Check if Flash is (sufficiently) erased
321 if ((result & data) != data)
322 return ERR_NOT_ERASED;
325 * Disable interrupts which might cause a timeout
326 * here. Remember that our exception vectors are
327 * at address 0 in the flash, and we don't want a
328 * (ticker) exception to happen while the flash
329 * chip is in programming mode.
332 cflag = icache_status ();
335 iflag = disable_interrupts ();
340 /* arm simple, non interrupt dependent timer */
341 reset_timer_masked ();
343 /* wait until flash is ready */
349 if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
353 if (!chip1 && ((result & 0x80) == (data & 0x80)))
356 if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) {
359 if ((result & 0x80) == (data & 0x80))
365 if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16))))
368 if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR)) {
371 if ((result & (0x80 << 16)) == (data & (0x80 << 16)))
377 } while (!chip1 || !chip2);
379 *addr = CMD_READ_ARRAY;
381 if (chip1 == ERR || chip2 == ERR || *addr != data)
385 enable_interrupts ();
395 /*-----------------------------------------------------------------------
396 * Copy memory to flash.
399 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
405 MEM_FLASH_ADDR1 = CMD_UNLOCK1;
406 MEM_FLASH_ADDR2 = CMD_UNLOCK2;
407 MEM_FLASH_ADDR1 = CMD_UNLOCK_BYPASS;
409 wp = (addr & ~3); /* get lower word aligned address */
412 * handle unaligned start bytes
414 if ((l = addr - wp) != 0) {
416 for (i = 0, cp = wp; i < l; ++i, ++cp) {
417 data = (data >> 8) | (*(uchar *) cp << 24);
419 for (; i < 4 && cnt > 0; ++i) {
420 data = (data >> 8) | (*src++ << 24);
424 for (; cnt == 0 && i < 4; ++i, ++cp) {
425 data = (data >> 8) | (*(uchar *) cp << 24);
428 if ((rc = write_word (info, wp, data)) != 0) {
435 * handle word aligned part
438 if (((ulong)src) & 0x3) {
439 for (i = 0; i < 4; i++) {
440 ((char *)&data)[i] = ((vu_char *)src)[i];
444 data = *((vu_long *) src);
447 if ((rc = write_word (info, wp, data)) != 0) {
461 * handle unaligned tail bytes
464 for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
465 data = (data >> 8) | (*src++ << 24);
468 for (; i < 4; ++i, ++cp) {
469 data = (data >> 8) | (*(uchar *) cp << 24);
472 rc = write_word (info, wp, data);
476 MEM_FLASH_ADDR = CMD_UNLOCK_BYPASS_RES1;
477 MEM_FLASH_ADDR = CMD_UNLOCK_BYPASS_RES2;
482 /*-----------------------------------------------------------------------
485 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
489 /* Write auto select command sequence and read Manufacturer ID */
490 addr[0x0555] = CMD_UNLOCK1;
491 addr[0x02AA] = CMD_UNLOCK2;
492 addr[0x0555] = CMD_READ_MANF_ID;
496 debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
500 info->flash_id = FLASH_MAN_AMD;
503 info->flash_id = FLASH_MAN_FUJ;
506 info->flash_id = FLASH_UNKNOWN;
507 info->sector_count = 0;
509 addr[0] = 0x00FF00FF; /* restore read mode */
510 debug ("## flash_init: unknown manufacturer\n");
511 return (0); /* no or unknown flash */
514 value = addr[1]; /* device ID */
516 debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
520 info->flash_id += FLASH_AM320B;
521 info->sector_count = 71;
522 info->size = 0x00800000;
524 addr[0] = 0x00FF00FF; /* restore read mode */
528 info->flash_id += FLASH_AM640U;
529 info->sector_count = 128;
530 info->size = 0x01000000;
532 addr[0] = 0x00F000F0; /* restore read mode */
533 break; /* => 16 MB */
536 debug ("## flash_init: unknown flash chip\n");
537 info->flash_id = FLASH_UNKNOWN;
538 addr[0] = 0x00FF00FF; /* restore read mode */
539 return (0); /* => no or unknown flash */
543 if (info->sector_count > CFG_MAX_FLASH_SECT) {
544 printf ("** ERROR: sector count %d > max (%d) **\n",
545 info->sector_count, CFG_MAX_FLASH_SECT);
546 info->sector_count = CFG_MAX_FLASH_SECT;