2 * (C) Copyright 2001-2005
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * Flash Routines for Intel devices
7 *--------------------------------------------------------------------
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
33 /*-----------------------------------------------------------------------
35 ulong flash_int_get_size (volatile unsigned long *baseaddr,
39 unsigned long flashtest_h, flashtest_l;
41 info->sector_count = info->size = 0;
42 info->flash_id = FLASH_UNKNOWN;
44 /* Write identify command sequence and test FLASH answer
46 baseaddr[0] = 0x00900090;
47 baseaddr[1] = 0x00900090;
49 flashtest_h = baseaddr[0]; /* manufacturer ID */
50 flashtest_l = baseaddr[1];
52 if (flashtest_h != INTEL_MANUFACT || flashtest_l != INTEL_MANUFACT)
53 return (0); /* no or unknown flash */
55 flashtest_h = baseaddr[2]; /* device ID */
56 flashtest_l = baseaddr[3];
58 if (flashtest_h != flashtest_l)
61 switch (flashtest_h) {
62 case INTEL_ID_28F160C3B:
63 info->flash_id = FLASH_28F160C3B;
64 info->sector_count = 39;
65 info->size = 0x00800000; /* 4 * 2 MB = 8 MB */
67 case INTEL_ID_28F160F3B:
68 info->flash_id = FLASH_28F160F3B;
69 info->sector_count = 39;
70 info->size = 0x00800000; /* 4 * 2 MB = 8 MB */
72 case INTEL_ID_28F640C3B:
73 info->flash_id = FLASH_28F640C3B;
74 info->sector_count = 135;
75 info->size = 0x02000000; /* 16 * 2 MB = 32 MB */
78 return (0); /* no or unknown flash */
81 info->flash_id |= INTEL_MANUFACT << 16; /* set manufacturer offset */
83 if (info->flash_id & FLASH_BTYPE) {
84 volatile unsigned long *tmp = baseaddr;
86 /* set up sector start adress table (bottom sector type)
87 * AND unlock the sectors (if our chip is 160C3)
89 for (i = 0; i < info->sector_count; i++) {
90 if (((info->flash_id & FLASH_TYPEMASK) == FLASH_28F160C3B) ||
91 ((info->flash_id & FLASH_TYPEMASK) == FLASH_28F640C3B)) {
97 info->start[i] = (uint) tmp;
98 tmp += i < 8 ? 0x2000 : 0x10000; /* pointer arith */
102 memset (info->protect, 0, info->sector_count);
104 baseaddr[0] = 0x00FF00FF;
105 baseaddr[1] = 0x00FF00FF;
110 static ulong flash_amd_get_size (vu_char *addr, flash_info_t *info)
114 ulong base = (ulong)addr;
116 /* Write auto select command: read Manufacturer ID */
124 devid = addr[1] & 0xff;
126 /* only support AMD */
127 if (vendor != 0x01) {
134 if (devid == AMD_ID_F040B) {
135 info->flash_id = vendor << 16 | devid;
136 info->sector_count = 8;
137 info->size = info->sector_count * 0x10000;
139 else if (devid == AMD_ID_F080B) {
140 info->flash_id = vendor << 16 | devid;
141 info->sector_count = 16;
142 info->size = 4 * info->sector_count * 0x10000;
144 else if (devid == AMD_ID_F016D) {
145 info->flash_id = vendor << 16 | devid;
146 info->sector_count = 32;
147 info->size = 4 * info->sector_count * 0x10000;
150 printf ("## Unknown Flash Type: %02x\n", devid);
154 /* check for protected sectors */
155 for (i = 0; i < info->sector_count; i++) {
156 /* sector base address */
157 info->start[i] = base + i * (info->size / info->sector_count);
158 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
159 /* D0 = 1 if protected */
160 addr = (volatile unsigned char *)(info->start[i]);
161 info->protect[i] = addr[2] & 1;
165 * Prevent writes to uninitialized FLASH.
167 if (info->flash_id != FLASH_UNKNOWN) {
168 addr = (vu_char *)info->start[0];
169 addr[0] = 0xF0; /* reset bank */
176 /*-----------------------------------------------------------------------
178 unsigned long flash_init (void)
180 unsigned long size_b0 = 0;
181 unsigned long size_b1 = 0;
184 /* Init: no FLASHes known
186 for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
187 flash_info[i].flash_id = FLASH_UNKNOWN;
190 /* Disable flash protection */
191 CPU86_BCR |= (CPU86_BCR_FWPT | CPU86_BCR_FWRE);
193 /* Static FLASH Bank configuration here (only one bank) */
195 size_b0 = flash_int_get_size ((ulong *) CFG_FLASH_BASE, &flash_info[0]);
196 size_b1 = flash_amd_get_size ((uchar *) CFG_BOOTROM_BASE, &flash_info[1]);
198 if (size_b0 > 0 || size_b1 > 0) {
204 print_size (size_b0, (size_b1 > 0) ? ", " : ") ");
209 print_size (size_b1, ") ");
213 printf ("## No FLASH found.\n");
216 /* protect monitor and environment sectors
219 #if CFG_MONITOR_BASE >= CFG_BOOTROM_BASE
221 /* If U-Boot is booted from ROM the CFG_MONITOR_BASE > CFG_FLASH_BASE
222 * but we shouldn't protect it.
225 flash_protect (FLAG_PROTECT_SET,
227 CFG_MONITOR_BASE + monitor_flash_len - 1, &flash_info[1]
231 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
232 flash_protect (FLAG_PROTECT_SET,
234 CFG_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]
239 #if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
240 # ifndef CFG_ENV_SIZE
241 # define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
243 # if CFG_ENV_ADDR >= CFG_BOOTROM_BASE
245 flash_protect (FLAG_PROTECT_SET,
247 CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[1]);
250 flash_protect (FLAG_PROTECT_SET,
252 CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
256 return (size_b0 + size_b1);
259 /*-----------------------------------------------------------------------
261 void flash_print_info (flash_info_t * info)
265 if (info->flash_id == FLASH_UNKNOWN) {
266 printf ("missing or unknown FLASH type\n");
270 switch ((info->flash_id >> 16) & 0xff) {
278 printf ("Unknown Vendor ");
282 switch (info->flash_id & FLASH_TYPEMASK) {
283 case FLASH_28F160C3B:
284 printf ("28F160C3B (16 Mbit, bottom sector)\n");
286 case FLASH_28F160F3B:
287 printf ("28F160F3B (16 Mbit, bottom sector)\n");
289 case FLASH_28F640C3B:
290 printf ("28F640C3B (64 M, bottom sector)\n");
293 printf ("AM29F040B (4 Mbit)\n");
296 printf ("Unknown Chip Type\n");
300 if (info->size < 0x100000)
301 printf (" Size: %ld KB in %d Sectors\n",
302 info->size >> 10, info->sector_count);
304 printf (" Size: %ld MB in %d Sectors\n",
305 info->size >> 20, info->sector_count);
307 printf (" Sector Start Addresses:");
308 for (i = 0; i < info->sector_count; ++i) {
313 info->protect[i] ? " (RO)" : " "
319 /*-----------------------------------------------------------------------
321 int flash_erase (flash_info_t * info, int s_first, int s_last)
323 vu_char *addr = (vu_char *)(info->start[0]);
324 int flag, prot, sect, l_sect;
325 ulong start, now, last;
327 if ((s_first < 0) || (s_first > s_last)) {
328 if (info->flash_id == FLASH_UNKNOWN) {
329 printf ("- missing\n");
331 printf ("- no sectors to erase\n");
337 for (sect = s_first; sect <= s_last; sect++) {
338 if (info->protect[sect])
343 printf ("- Warning: %d protected sectors will not be erased!\n",
349 /* Check the type of erased flash
351 if (info->flash_id >> 16 == 0x1) {
356 /* Disable interrupts which might cause a timeout here */
357 flag = disable_interrupts();
365 /* wait at least 80us - let's wait 1 ms */
368 /* Start erase on unprotected sectors */
369 for (sect = s_first; sect<=s_last; sect++) {
370 if (info->protect[sect] == 0) { /* not protected */
371 addr = (vu_char *)(info->start[sect]);
377 /* re-enable interrupts if necessary */
381 /* wait at least 80us - let's wait 1 ms */
385 * We wait for the last triggered sector
390 start = get_timer (0);
392 addr = (vu_char *)(info->start[l_sect]);
393 while ((addr[0] & 0x80) != 0x80) {
394 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
395 printf ("Timeout\n");
398 /* show that we're waiting */
399 if ((now - last) > 1000) { /* every second */
406 /* reset to read mode */
407 addr = (volatile unsigned char *)info->start[0];
408 addr[0] = 0xF0; /* reset bank */
414 /* Start erase on unprotected sectors
416 for (sect = s_first; sect <= s_last; sect++) {
417 volatile ulong *addr =
418 (volatile unsigned long *) info->start[sect];
420 start = get_timer (0);
422 if (info->protect[sect] == 0) {
423 /* Disable interrupts which might cause a timeout here
425 flag = disable_interrupts ();
429 addr[0] = 0x00200020;
430 addr[1] = 0x00200020;
431 addr[0] = 0x00D000D0;
432 addr[1] = 0x00D000D0;
434 /* re-enable interrupts if necessary
437 enable_interrupts ();
439 /* wait at least 80us - let's wait 1 ms
444 while ((addr[0] & 0x00800080) != 0x00800080 ||
445 (addr[1] & 0x00800080) != 0x00800080) {
446 if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
447 printf ("Timeout (erase suspended!)\n");
450 addr[0] = 0x00B000B0;
451 addr[1] = 0x00B000B0;
454 /* show that we're waiting
456 if ((now - last) > 1000) { /* every second */
461 if (addr[0] & 0x00220022 || addr[1] & 0x00220022) {
462 printf ("*** ERROR: erase failed!\n");
466 /* Clear status register and reset to read mode
468 addr[0] = 0x00500050;
469 addr[1] = 0x00500050;
470 addr[0] = 0x00FF00FF;
471 addr[1] = 0x00FF00FF;
481 static int write_word (flash_info_t *, volatile unsigned long *, ulong);
482 static int write_byte (flash_info_t *info, ulong dest, uchar data);
484 /*-----------------------------------------------------------------------
485 * Copy memory to flash, returns:
488 * 2 - Flash not erased
490 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
493 int i, l, rc, cc = cnt, res = 0;
495 if (info->flash_id >> 16 == 0x1) {
497 /* Write to AMD 8-bit flash
500 if ((rc = write_byte(info, addr, *src)) != 0) {
511 /* Write to Intel 64-bit flash
513 for (v=0; cc > 0; addr += 4, cc -= 4 - l) {
517 for (i = 0; i < 4; i++) {
518 v = (v << 8) + (i < l || i - l >= cc ?
519 *((unsigned char *) addr + i) : *src++);
522 if ((res = write_word (info, (volatile unsigned long *) addr, v)) != 0)
530 /*-----------------------------------------------------------------------
531 * Write a word to Flash, returns:
534 * 2 - Flash not erased
536 static int write_word (flash_info_t * info, volatile unsigned long *addr,
542 /* Check if Flash is (sufficiently) erased
544 if ((*addr & data) != data)
547 /* Disable interrupts which might cause a timeout here
549 flag = disable_interrupts ();
554 /* re-enable interrupts if necessary
557 enable_interrupts ();
559 start = get_timer (0);
560 while ((*addr & 0x00800080) != 0x00800080) {
561 if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
570 if (*addr & 0x00220022) {
571 printf ("*** ERROR: program failed!\n");
576 /* Clear status register and reset to read mode
584 /*-----------------------------------------------------------------------
585 * Write a byte to Flash, returns:
588 * 2 - Flash not erased
590 static int write_byte (flash_info_t *info, ulong dest, uchar data)
592 vu_char *addr = (vu_char *)(info->start[0]);
596 /* Check if Flash is (sufficiently) erased */
597 if ((*((vu_char *)dest) & data) != data) {
600 /* Disable interrupts which might cause a timeout here */
601 flag = disable_interrupts();
607 *((vu_char *)dest) = data;
609 /* re-enable interrupts if necessary */
613 /* data polling for D7 */
614 start = get_timer (0);
615 while ((*((vu_char *)dest) & 0x80) != (data & 0x80)) {
616 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
623 /*-----------------------------------------------------------------------