2 * (C) Copyright 2000-2002
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,
28 #define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
31 flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
33 /*-----------------------------------------------------------------------
36 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
37 static int write_word (flash_info_t *info, ulong dest, ulong data);
39 /*-----------------------------------------------------------------------
42 unsigned long flash_init (void)
44 volatile immap_t *immap = (immap_t *)CFG_IMMR;
45 volatile memctl8xx_t *memctl = &immap->im_memctl;
46 unsigned long size_b0, size_b1;
49 /* Init: no FLASHes known */
50 for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
51 flash_info[i].flash_id = FLASH_UNKNOWN;
54 /* Static FLASH Bank configuration here - FIXME XXX */
56 size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
58 if (flash_info[0].flash_id == FLASH_UNKNOWN) {
59 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
60 size_b0, size_b0<<20);
63 size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
65 if (size_b1 > size_b0) {
67 "Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
71 flash_info[0].flash_id = FLASH_UNKNOWN;
72 flash_info[1].flash_id = FLASH_UNKNOWN;
73 flash_info[0].sector_count = -1;
74 flash_info[1].sector_count = -1;
75 flash_info[0].size = 0;
76 flash_info[1].size = 0;
80 /* Remap FLASH according to real size */
81 memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
82 memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
84 /* Re-do sizing to get full correct info */
85 size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
87 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
88 /* monitor protection ON by default */
89 flash_protect(FLAG_PROTECT_SET,
91 CFG_MONITOR_BASE+monitor_flash_len-1,
95 #ifdef CFG_ENV_IS_IN_FLASH
96 /* ENV protection ON by default */
97 flash_protect(FLAG_PROTECT_SET,
99 CFG_ENV_ADDR+CFG_ENV_SIZE-1,
104 memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000);
105 memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
108 /* Re-do sizing to get full correct info */
109 size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + size_b0),
112 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
113 /* monitor protection ON by default */
114 flash_protect(FLAG_PROTECT_SET,
116 CFG_MONITOR_BASE+monitor_flash_len-1,
120 #ifdef CFG_ENV_IS_IN_FLASH
121 /* ENV protection ON by default */
122 flash_protect(FLAG_PROTECT_SET,
124 CFG_ENV_ADDR+CFG_ENV_SIZE-1,
128 memctl->memc_br1 = 0; /* invalidate bank */
130 flash_info[1].flash_id = FLASH_UNKNOWN;
131 flash_info[1].sector_count = -1;
134 flash_info[0].size = size_b0;
135 flash_info[1].size = size_b1;
137 return (size_b0 + size_b1);
140 /*-----------------------------------------------------------------------
142 void flash_print_info (flash_info_t *info)
146 if (info->flash_id == FLASH_UNKNOWN) {
147 printf ("missing or unknown FLASH type\n");
151 switch (info->flash_id & FLASH_VENDMASK) {
152 case FLASH_MAN_AMD: printf ("AMD "); break;
153 case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
154 default: printf ("Unknown Vendor "); break;
157 switch (info->flash_id & FLASH_TYPEMASK) {
158 case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
160 case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
162 case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
164 case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
166 case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
168 case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
170 case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
172 case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
174 default: printf ("Unknown Chip Type\n");
178 printf (" Size: %ld MB in %d Sectors\n",
179 info->size >> 20, info->sector_count);
181 printf (" Sector Start Addresses:");
182 for (i=0; i<info->sector_count; ++i) {
187 info->protect[i] ? " (RO)" : " "
194 /*-----------------------------------------------------------------------
198 /*-----------------------------------------------------------------------
202 * The following code cannot be run from FLASH!
205 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
209 ulong base = (ulong)addr;
211 /* Write auto select command: read Manufacturer ID */
212 addr[0x0555] = 0x00AA00AA;
213 addr[0x02AA] = 0x00550055;
214 addr[0x0555] = 0x00900090;
220 info->flash_id = FLASH_MAN_AMD;
223 info->flash_id = FLASH_MAN_FUJ;
226 info->flash_id = FLASH_UNKNOWN;
227 info->sector_count = 0;
229 return (0); /* no or unknown flash */
232 value = addr[1]; /* device ID */
236 info->flash_id += FLASH_AM400T;
237 info->sector_count = 11;
238 info->size = 0x00100000;
242 info->flash_id += FLASH_AM400B;
243 info->sector_count = 11;
244 info->size = 0x00100000;
248 info->flash_id += FLASH_AM800T;
249 info->sector_count = 19;
250 info->size = 0x00200000;
254 info->flash_id += FLASH_AM800B;
255 info->sector_count = 19;
256 info->size = 0x00200000;
260 info->flash_id += FLASH_AM160T;
261 info->sector_count = 35;
262 info->size = 0x00400000;
266 info->flash_id += FLASH_AM160B;
267 info->sector_count = 35;
268 info->size = 0x00400000;
271 info->flash_id += FLASH_AM320T;
272 info->sector_count = 71;
273 info->size = 0x00800000;
277 info->flash_id += FLASH_AM320B;
278 info->sector_count = 71;
279 info->size = 0x00800000;
282 info->flash_id = FLASH_UNKNOWN;
283 return (0); /* => no or unknown flash */
286 /* set up sector start address table */
291 /* set sector offsets for bottom boot block type */
292 info->start[0] = base + 0x00000000;
293 info->start[1] = base + 0x00008000;
294 info->start[2] = base + 0x0000C000;
295 info->start[3] = base + 0x00010000;
296 for (i = 4; i < info->sector_count; i++) {
297 info->start[i] = base + (i * 0x00020000) - 0x00060000;
303 /* set sector offsets for top boot block type */
304 i = info->sector_count - 1;
305 info->start[i--] = base + info->size - 0x00008000;
306 info->start[i--] = base + info->size - 0x0000C000;
307 info->start[i--] = base + info->size - 0x00010000;
308 for (; i >= 0; i--) {
309 info->start[i] = base + i * 0x00020000;
313 for (i = 0; i < info->sector_count; i++) {
314 info->start[i] = base;
316 * The first 8 sectors are 8 kB,
317 * all the other ones are 64 kB
325 for (i = 0; i < info->sector_count; i++) {
326 info->start[i] = base;
328 * The last 8 sectors are 8 kB,
329 * all the other ones are 64 kB
331 base += (i < (info->sector_count - 8))
341 /* check for protected sectors */
342 for (i = 0; i < info->sector_count; i++) {
343 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
344 /* D0 = 1 if protected */
345 addr = (volatile unsigned long *)(info->start[i]);
346 info->protect[i] = addr[2] & 1;
350 * Prevent writes to uninitialized FLASH.
352 if (info->flash_id != FLASH_UNKNOWN) {
353 addr = (volatile unsigned long *)info->start[0];
355 *addr = 0x00F000F0; /* reset bank */
362 /*-----------------------------------------------------------------------
365 int flash_erase (flash_info_t *info, int s_first, int s_last)
367 vu_long *addr = (vu_long*)(info->start[0]);
368 int flag, prot, sect, l_sect;
369 ulong start, now, last;
371 if ((s_first < 0) || (s_first > s_last)) {
372 if (info->flash_id == FLASH_UNKNOWN) {
373 printf ("- missing\n");
375 printf ("- no sectors to erase\n");
380 if ((info->flash_id == FLASH_UNKNOWN) ||
381 (info->flash_id > FLASH_AMD_COMP)) {
382 printf ("Can't erase unknown flash type %08lx - aborted\n",
388 for (sect=s_first; sect<=s_last; ++sect) {
389 if (info->protect[sect]) {
395 printf ("- Warning: %d protected sectors will not be erased!\n",
403 /* Disable interrupts which might cause a timeout here */
404 flag = disable_interrupts();
406 addr[0x0555] = 0x00AA00AA;
407 addr[0x02AA] = 0x00550055;
408 addr[0x0555] = 0x00800080;
409 addr[0x0555] = 0x00AA00AA;
410 addr[0x02AA] = 0x00550055;
412 /* Start erase on unprotected sectors */
413 for (sect = s_first; sect<=s_last; sect++) {
414 if (info->protect[sect] == 0) { /* not protected */
415 addr = (vu_long*)(info->start[sect]);
416 addr[0] = 0x00300030;
421 /* re-enable interrupts if necessary */
425 /* wait at least 80us - let's wait 1 ms */
429 * We wait for the last triggered sector
434 start = get_timer (0);
436 addr = (vu_long*)(info->start[l_sect]);
437 while ((addr[0] & 0x00800080) != 0x00800080) {
438 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
439 printf ("Timeout\n");
442 /* show that we're waiting */
443 if ((now - last) > 1000) { /* every second */
450 /* reset to read mode */
451 addr = (volatile unsigned long *)info->start[0];
452 addr[0] = 0x00F000F0; /* reset bank */
458 /*-----------------------------------------------------------------------
459 * Copy memory to flash, returns:
462 * 2 - Flash not erased
465 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
470 wp = (addr & ~3); /* get lower word aligned address */
473 * handle unaligned start bytes
475 if ((l = addr - wp) != 0) {
477 for (i=0, cp=wp; i<l; ++i, ++cp) {
478 data = (data << 8) | (*(uchar *)cp);
480 for (; i<4 && cnt>0; ++i) {
481 data = (data << 8) | *src++;
485 for (; cnt==0 && i<4; ++i, ++cp) {
486 data = (data << 8) | (*(uchar *)cp);
489 if ((rc = write_word(info, wp, data)) != 0) {
496 * handle word aligned part
500 for (i=0; i<4; ++i) {
501 data = (data << 8) | *src++;
503 if ((rc = write_word(info, wp, data)) != 0) {
515 * handle unaligned tail bytes
518 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
519 data = (data << 8) | *src++;
522 for (; i<4; ++i, ++cp) {
523 data = (data << 8) | (*(uchar *)cp);
526 return (write_word(info, wp, data));
529 /*-----------------------------------------------------------------------
530 * Write a word to Flash, returns:
533 * 2 - Flash not erased
535 static int write_word (flash_info_t *info, ulong dest, ulong data)
537 vu_long *addr = (vu_long*)(info->start[0]);
541 /* Check if Flash is (sufficiently) erased */
542 if ((*((vu_long *)dest) & data) != data) {
545 /* Disable interrupts which might cause a timeout here */
546 flag = disable_interrupts();
548 addr[0x0555] = 0x00AA00AA;
549 addr[0x02AA] = 0x00550055;
550 addr[0x0555] = 0x00A000A0;
552 *((vu_long *)dest) = data;
554 /* re-enable interrupts if necessary */
558 /* data polling for D7 */
559 start = get_timer (0);
560 while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
561 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
568 /*-----------------------------------------------------------------------