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,
27 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
32 static ulong flash_get_size(vu_long *addr, flash_info_t *info);
33 static int write_word(flash_info_t *info, ulong dest, ulong data);
34 static void flash_get_offsets(ulong base, flash_info_t *info);
36 unsigned long flash_init(void)
38 unsigned long size_b0, size_b1;
41 /* Init: no FLASHes known */
42 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
43 flash_info[i].flash_id = FLASH_UNKNOWN;
46 size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE,
50 flash_get_offsets(CONFIG_SYS_FLASH_BASE, &flash_info[0]);
52 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
53 /* Monitor protection ON by default */
54 flash_protect(FLAG_PROTECT_SET,
55 CONFIG_SYS_MONITOR_BASE,
56 CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
62 flash_info[1].flash_id = FLASH_UNKNOWN;
63 flash_info[1].sector_count = -1;
65 flash_info[0].size = size_b0;
66 flash_info[1].size = size_b1;
68 return size_b0 + size_b1;
71 /*-----------------------------------------------------------------------
72 * Fix this to support variable sector sizes
74 static void flash_get_offsets(ulong base, flash_info_t *info)
78 /* set up sector start address table */
79 if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
80 /* set sector offsets for bottom boot block type */
81 for (i = 0; i < info->sector_count; i++)
82 info->start[i] = base + (i * 0x00010000);
86 /*-----------------------------------------------------------------------
88 void flash_print_info(flash_info_t *info)
92 if (info->flash_id == FLASH_UNKNOWN) {
93 puts("missing or unknown FLASH type\n");
97 switch (info->flash_id & FLASH_VENDMASK) {
105 printf("BRIGHT MICRO ");
108 printf("Unknown Vendor ");
112 switch (info->flash_id & FLASH_TYPEMASK) {
114 printf("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
117 printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
120 printf("AM29LV400T (4 Mbit, top boot sector)\n");
123 printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
126 printf("AM29LV800T (8 Mbit, top boot sector)\n");
129 printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
132 printf("AM29LV160T (16 Mbit, top boot sector)\n");
135 printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
138 printf("AM29LV320T (32 Mbit, top boot sector)\n");
141 printf("Unknown Chip Type\n");
145 if (info->size >> 20) {
146 printf(" Size: %ld MB in %d Sectors\n",
150 printf(" Size: %ld KB in %d Sectors\n",
155 puts(" Sector Start Addresses:");
157 for (i = 0; i < info->sector_count; ++i) {
163 info->protect[i] ? " (RO)" : " ");
171 * The following code cannot be run from FLASH!
174 static ulong flash_get_size(vu_long *addr, flash_info_t *info)
177 volatile unsigned char *caddr;
180 caddr = (volatile unsigned char *)addr ;
182 /* Write auto select command: read Manufacturer ID */
184 debug("Base address is: %08x\n", caddr);
186 caddr[0x0555] = 0xAA;
187 caddr[0x02AA] = 0x55;
188 caddr[0x0555] = 0x90;
192 debug("Manufact ID: %02x\n", value);
195 case 0x01: /*AMD_MANUFACT*/
196 info->flash_id = FLASH_MAN_AMD;
199 case 0x04: /*FUJ_MANUFACT*/
200 info->flash_id = FLASH_MAN_FUJ;
204 info->flash_id = FLASH_UNKNOWN;
205 info->sector_count = 0;
210 value = caddr[1]; /* device ID */
212 debug("Device ID: %02x\n", value);
216 info->flash_id += FLASH_AM040;
217 info->sector_count = 8;
218 info->size = 0x00080000;
219 break; /* => 512Kb */
222 info->flash_id = FLASH_UNKNOWN;
223 return 0; /* => no or unknown flash */
226 flash_get_offsets((ulong)addr, &flash_info[0]);
228 /* check for protected sectors */
229 for (i = 0; i < info->sector_count; i++) {
231 * read sector protection at sector address,
233 * D0 = 1 if protected
235 caddr = (volatile unsigned char *)(info->start[i]);
236 info->protect[i] = caddr[2] & 1;
240 * Prevent writes to uninitialized FLASH.
242 if (info->flash_id != FLASH_UNKNOWN) {
243 caddr = (volatile unsigned char *)info->start[0];
244 *caddr = 0xF0; /* reset bank */
251 int flash_erase(flash_info_t *info, int s_first, int s_last)
253 volatile unsigned char *addr =
254 (volatile unsigned char *)(info->start[0]);
255 int flag, prot, sect, l_sect;
256 ulong start, now, last;
258 if ((s_first < 0) || (s_first > s_last)) {
259 if (info->flash_id == FLASH_UNKNOWN)
260 printf("- missing\n");
262 printf("- no sectors to erase\n");
267 if ((info->flash_id == FLASH_UNKNOWN) ||
268 (info->flash_id > FLASH_AMD_COMP)) {
269 printf("Can't erase unknown flash type - aborted\n");
274 for (sect = s_first; sect <= s_last; ++sect) {
275 if (info->protect[sect])
280 printf("- Warning: %d protected sectors will not be erased!\n",
288 /* Disable interrupts which might cause a timeout here */
289 flag = disable_interrupts();
297 /* Start erase on unprotected sectors */
298 for (sect = s_first; sect <= s_last; sect++) {
299 if (info->protect[sect] == 0) { /* not protected */
300 addr = (volatile unsigned char *)(info->start[sect]);
306 /* re-enable interrupts if necessary */
310 /* wait at least 80us - let's wait 1 ms */
314 * We wait for the last triggered sector
319 start = get_timer(0);
321 addr = (volatile unsigned char *)(info->start[l_sect]);
323 while ((addr[0] & 0xFF) != 0xFF) {
324 now = get_timer(start);
325 if (now > CONFIG_SYS_FLASH_ERASE_TOUT) {
329 /* show that we're waiting */
330 if ((now - last) > 1000) { /* every second */
337 /* reset to read mode */
338 addr = (volatile unsigned char *)info->start[0];
340 addr[0] = 0xF0; /* reset bank */
347 * Copy memory to flash, returns:
350 * 2 - Flash not erased
353 int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
358 wp = (addr & ~3); /* get lower word aligned address */
361 * handle unaligned start bytes
367 for (i = 0, cp = wp; i < l; ++i, ++cp)
368 data = (data << 8) | (*(uchar *)cp);
370 for (; i < 4 && cnt > 0; ++i) {
371 data = (data << 8) | *src++;
376 for (; cnt == 0 && i < 4; ++i, ++cp)
377 data = (data << 8) | (*(uchar *)cp);
379 rc = write_word(info, wp, data);
388 * handle word aligned part
392 for (i = 0; i < 4; ++i)
393 data = (data << 8) | *src++;
395 rc = write_word(info, wp, data);
408 * handle unaligned tail bytes
411 for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
412 data = (data << 8) | *src++;
415 for (; i < 4; ++i, ++cp)
416 data = (data << 8) | (*(uchar *)cp);
418 return write_word(info, wp, data);
422 * Write a word to Flash, returns:
425 * 2 - Flash not erased
427 static int write_word(flash_info_t *info, ulong dest, ulong data)
429 volatile unsigned char *cdest, *cdata;
430 volatile unsigned char *addr =
431 (volatile unsigned char *)(info->start[0]);
433 int flag, count = 4 ;
435 cdest = (volatile unsigned char *)dest ;
436 cdata = (volatile unsigned char *)&data ;
438 /* Check if Flash is (sufficiently) erased */
439 if ((*((vu_long *)dest)&data) != data)
443 /* Disable interrupts which might cause a timeout here */
444 flag = disable_interrupts();
452 /* re-enable interrupts if necessary */
456 /* data polling for D7 */
457 start = get_timer(0);
458 while ((*cdest ^ *cdata) & 0x80) {
459 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)