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
32 * Modified July 20, 2001
33 * Strip down to support ONLY the AMD29F032B.
34 * Dave Updegraff - Cray, Inc. dave@cray.com
39 #include <asm/processor.h>
41 /* The flash chip we use... */
42 #define AMD_ID_F032B 0x41 /* 29F032B ID 32 Mbit,64 64Kx8 sectors */
43 #define FLASH_AM320B 0x0009
46 flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
48 /*-----------------------------------------------------------------------
51 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
52 static int write_word (flash_info_t *info, ulong dest, ulong data);
53 static void flash_get_offsets (ulong base, flash_info_t *info);
57 #define FLASH_WORD_SIZE unsigned char
59 /*-----------------------------------------------------------------------
62 unsigned long flash_init (void)
64 unsigned long size_b0, size_b1;
67 /* Init: no FLASHes known */
68 for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
69 flash_info[i].flash_id = FLASH_UNKNOWN;
72 /* Static FLASH Bank configuration here - FIXME XXX */
74 size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
76 if (flash_info[0].flash_id == FLASH_UNKNOWN) {
77 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
78 size_b0, size_b0<<20);
82 if (CFG_MAX_FLASH_BANKS == 1)
85 flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);
88 /* Monitor protection ON by default */
89 (void)flash_protect(FLAG_PROTECT_SET,
91 FLASH_BASE0_PRELIM+monitor_flash_len-1,
95 flash_info[0].size = size_b0;
98 return (size_b0 + size_b1);
103 /*-----------------------------------------------------------------------
105 static void flash_get_offsets (ulong base, flash_info_t *info)
109 /* set up sector start address table */
110 for (i = 0; i < info->sector_count; i++)
111 info->start[i] = base + (i * 0x00010000);
114 /*-----------------------------------------------------------------------
116 void flash_print_info (flash_info_t *info)
122 volatile unsigned long *flash;
124 if (info->flash_id == FLASH_UNKNOWN) {
125 printf ("missing or unknown FLASH type\n");
129 switch (info->flash_id & FLASH_VENDMASK) {
130 case FLASH_MAN_AMD: printf ("AMD "); break;
131 default: printf ("Unknown Vendor "); break;
134 switch (info->flash_id & FLASH_TYPEMASK) {
135 case FLASH_AM320B:printf ("AM29F032B (32 Mbit 64x64KB uniform sectors)\n");
137 default: printf ("Unknown Chip Type\n");
141 printf (" Size: %ld KB in %d Sectors\n",
142 info->size >> 10, info->sector_count);
144 printf (" Sector Start Addresses:");
145 for (i=0; i<info->sector_count; ++i) {
147 * Check if whole sector is erased
149 if (i != (info->sector_count-1))
150 size = info->start[i+1] - info->start[i];
152 size = info->start[0] + info->size - info->start[i];
154 flash = (volatile unsigned long *)info->start[i];
155 size = size >> 2; /* divide by 4 for longword access */
156 for (k=0; k<size; k++)
158 if (*flash++ != 0xffffffff)
168 printf (" %08lX%s%s",
171 info->protect[i] ? "RO " : " "
177 /*-----------------------------------------------------------------------
181 /*-----------------------------------------------------------------------
185 * The following code cannot be run from FLASH!
187 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
190 FLASH_WORD_SIZE value;
191 ulong base = (ulong)addr;
192 volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;
194 /* Write auto select command: read Manufacturer ID */
195 addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
196 addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
197 addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090;
202 case (FLASH_WORD_SIZE)AMD_MANUFACT:
203 info->flash_id = FLASH_MAN_AMD;
206 info->flash_id = FLASH_UNKNOWN;
207 info->sector_count = 0;
209 return (0); /* no or unknown flash */
212 value = addr2[1]; /* device ID */
215 case (FLASH_WORD_SIZE)AMD_ID_F032B:
216 info->flash_id += FLASH_AM320B;
217 info->sector_count = 64;
218 info->size = 0x0400000; /* => 4 MB */
221 info->flash_id = FLASH_UNKNOWN;
222 return (0); /* => no or unknown flash */
226 /* set up sector start address table */
227 for (i = 0; i < info->sector_count; i++)
228 info->start[i] = base + (i * 0x00010000);
230 /* check for protected sectors */
231 for (i = 0; i < info->sector_count; i++) {
232 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
233 /* D0 = 1 if protected */
234 addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
235 info->protect[i] = addr2[2] & 1;
239 * Prevent writes to uninitialized FLASH.
241 if (info->flash_id != FLASH_UNKNOWN) {
242 addr2 = (FLASH_WORD_SIZE *)info->start[0];
243 *addr2 = (FLASH_WORD_SIZE)0x00F000F0; /* reset bank */
249 int wait_for_DQ7(flash_info_t *info, int sect)
251 ulong start, now, last;
252 volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);
254 start = get_timer (0);
256 while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
257 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
258 printf ("Timeout\n");
261 /* show that we're waiting */
262 if ((now - last) > 1000) { /* every second */
270 /*-----------------------------------------------------------------------
273 int flash_erase (flash_info_t *info, int s_first, int s_last)
275 volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
276 volatile FLASH_WORD_SIZE *addr2;
277 int flag, prot, sect, l_sect;
279 if ((s_first < 0) || (s_first > s_last)) {
280 if (info->flash_id == FLASH_UNKNOWN) {
281 printf ("- missing\n");
283 printf ("- no sectors to erase\n");
288 if (info->flash_id == FLASH_UNKNOWN) {
289 printf ("Can't erase unknown flash type - aborted\n");
294 for (sect=s_first; sect<=s_last; ++sect) {
295 if (info->protect[sect]) {
301 printf ("- Warning: %d protected sectors will not be erased!\n",
309 /* Disable interrupts which might cause a timeout here */
310 flag = disable_interrupts();
312 /* Start erase on unprotected sectors */
313 for (sect = s_first; sect<=s_last; sect++) {
314 if (info->protect[sect] == 0) { /* not protected */
315 addr2 = (FLASH_WORD_SIZE *)(info->start[sect]);
316 printf("Erasing sector %p\n", addr2);
318 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
319 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
320 addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
321 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
322 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
323 addr2[0] = (FLASH_WORD_SIZE)0x00300030; /* sector erase */
326 * Wait for each sector to complete, it's more
327 * reliable. According to AMD Spec, you must
328 * issue all erase commands within a specified
329 * timeout. This has been seen to fail, especially
330 * if printf()s are included (for debug)!!
332 wait_for_DQ7(info, sect);
336 /* re-enable interrupts if necessary */
340 /* wait at least 80us - let's wait 1 ms */
343 /* reset to read mode */
344 addr = (FLASH_WORD_SIZE *)info->start[0];
345 addr[0] = (FLASH_WORD_SIZE)0x00F000F0; /* reset bank */
351 /*-----------------------------------------------------------------------
352 * Copy memory to flash, returns:
355 * 2 - Flash not erased
358 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
363 wp = (addr & ~3); /* get lower word aligned address */
366 * handle unaligned start bytes
368 if ((l = addr - wp) != 0) {
370 for (i=0, cp=wp; i<l; ++i, ++cp) {
371 data = (data << 8) | (*(uchar *)cp);
373 for (; i<4 && cnt>0; ++i) {
374 data = (data << 8) | *src++;
378 for (; cnt==0 && i<4; ++i, ++cp) {
379 data = (data << 8) | (*(uchar *)cp);
382 if ((rc = write_word(info, wp, data)) != 0) {
389 * handle word aligned part
393 for (i=0; i<4; ++i) {
394 data = (data << 8) | *src++;
396 if ((rc = write_word(info, wp, data)) != 0) {
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);
419 return (write_word(info, wp, data));
422 /*-----------------------------------------------------------------------
423 * Write a word to Flash, returns:
426 * 2 - Flash not erased
428 static int write_word (flash_info_t *info, ulong dest, ulong data)
430 volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)(info->start[0]);
431 volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *)dest;
432 volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data;
437 /* Check if Flash is (sufficiently) erased */
438 if ((*((volatile FLASH_WORD_SIZE *)dest) &
439 (FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) {
442 /* Disable interrupts which might cause a timeout here */
443 flag = disable_interrupts();
445 for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++)
447 addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
448 addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
449 addr2[ADDR0] = (FLASH_WORD_SIZE)0x00A000A0;
453 /* re-enable interrupts if necessary */
457 /* data polling for D7 */
458 start = get_timer (0);
459 while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) !=
460 (data2[i] & (FLASH_WORD_SIZE)0x00800080)) {
461 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
470 /*-----------------------------------------------------------------------