2 * (C) Copyright 2003-2004
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de
8 * Modified for the CMC PU2 by (C) Copyright 2004 Gary Jennejohn
11 * See file CREDITS for list of people who contributed to this
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
33 #define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
36 flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
39 * CPU to flash interface is 32-bit, so make declaration accordingly
41 typedef unsigned short FLASH_PORT_WIDTH;
42 typedef volatile unsigned short FLASH_PORT_WIDTHV;
44 #define FPW FLASH_PORT_WIDTH
45 #define FPWV FLASH_PORT_WIDTHV
47 #define FLASH_CYCLE1 0x0555
48 #define FLASH_CYCLE2 0x02AA
50 /*-----------------------------------------------------------------------
53 static ulong flash_get_size(FPWV *addr, flash_info_t *info);
54 static void flash_reset(flash_info_t *info);
55 static int write_word_amd(flash_info_t *info, FPWV *dest, FPW data);
56 static flash_info_t *flash_get_info(ulong base);
58 /*-----------------------------------------------------------------------
61 * sets up flash_info and returns size of FLASH (bytes)
63 unsigned long flash_init (void)
65 unsigned long size = 0;
66 ulong flashbase = CFG_FLASH_BASE;
68 /* Init: no FLASHes known */
69 memset(&flash_info[0], 0, sizeof(flash_info_t));
72 flash_get_size((FPW *)flashbase, &flash_info[0]);
74 size = flash_info[0].size;
76 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
77 /* monitor protection ON by default */
78 flash_protect(FLAG_PROTECT_SET,
80 CFG_MONITOR_BASE+monitor_flash_len-1,
81 flash_get_info(CFG_MONITOR_BASE));
84 #ifdef CFG_ENV_IS_IN_FLASH
85 /* ENV protection ON by default */
86 flash_protect(FLAG_PROTECT_SET,
88 CFG_ENV_ADDR+CFG_ENV_SIZE-1,
89 flash_get_info(CFG_ENV_ADDR));
92 return size ? size : 1;
95 /*-----------------------------------------------------------------------
97 static void flash_reset(flash_info_t *info)
99 FPWV *base = (FPWV *)(info->start[0]);
101 /* Put FLASH back in read mode */
102 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
103 *base = (FPW)0x00FF; /* Intel Read Mode */
104 else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)
105 *base = (FPW)0x00F0; /* AMD Read Mode */
108 /*-----------------------------------------------------------------------
111 static flash_info_t *flash_get_info(ulong base)
117 for (i = 0; i < CFG_MAX_FLASH_BANKS; i ++) {
118 info = & flash_info[i];
119 if (info->size && info->start[0] <= base &&
120 base <= info->start[0] + info->size - 1)
124 return i == CFG_MAX_FLASH_BANKS ? 0 : info;
127 /*-----------------------------------------------------------------------
130 void flash_print_info (flash_info_t *info)
134 if (info->flash_id == FLASH_UNKNOWN) {
135 printf ("missing or unknown FLASH type\n");
139 switch (info->flash_id & FLASH_VENDMASK) {
140 case FLASH_MAN_AMD: printf ("AMD "); break;
141 case FLASH_MAN_BM: printf ("BRIGHT MICRO "); break;
142 case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
143 case FLASH_MAN_SST: printf ("SST "); break;
144 case FLASH_MAN_STM: printf ("STM "); break;
145 case FLASH_MAN_INTEL: printf ("INTEL "); break;
146 default: printf ("Unknown Vendor "); break;
149 switch (info->flash_id & FLASH_TYPEMASK) {
150 case FLASH_S29GL064M:
151 printf ("S29GL064M-R6 (64Mbit, uniform sector size)\n");
154 printf ("Unknown Chip Type\n");
158 printf (" Size: %ld MB in %d Sectors\n",
162 printf (" Sector Start Addresses:");
164 for (i=0; i<info->sector_count; ++i) {
170 info->protect[i] ? " (RO)" : " ");
176 /*-----------------------------------------------------------------------
180 * The following code cannot be run from FLASH!
183 ulong flash_get_size (FPWV *addr, flash_info_t *info)
186 ulong base = (ulong)addr;
188 /* Write auto select command: read Manufacturer ID */
189 /* Write auto select command sequence and test FLASH answer */
190 addr[FLASH_CYCLE1] = (FPW)0x00AA; /* for AMD, Intel ignores this */
191 addr[FLASH_CYCLE2] = (FPW)0x0055; /* for AMD, Intel ignores this */
192 addr[FLASH_CYCLE1] = (FPW)0x0090; /* selects Intel or AMD */
194 /* The manufacturer codes are only 1 byte, so just use 1 byte.
195 * This works for any bus width and any FLASH device width.
198 switch (addr[0] & 0xff) {
200 case (uchar)AMD_MANUFACT:
201 debug ("Manufacturer: AMD (Spansion)\n");
202 info->flash_id = FLASH_MAN_AMD;
205 case (uchar)INTEL_MANUFACT:
206 debug ("Manufacturer: Intel (not supported yet)\n");
207 info->flash_id = FLASH_MAN_INTEL;
211 info->flash_id = FLASH_UNKNOWN;
212 info->sector_count = 0;
217 /* Check 16 bits or 32 bits of ID so work on 32 or 16 bit bus. */
218 if (info->flash_id != FLASH_UNKNOWN) switch ((FPW)addr[1]) {
221 debug ("Mirror Bit flash: addr[14] = %08X addr[15] = %08X\n",
224 switch(addr[14] & 0xffff) {
225 case (AMD_ID_GL064M_2 & 0xffff):
226 if (addr[15] != (AMD_ID_GL064M_3 & 0xffff)) {
227 printf ("Chip: S29GLxxxM -> unknown\n");
228 info->flash_id = FLASH_UNKNOWN;
229 info->sector_count = 0;
232 debug ("Chip: S29GL064M-R6\n");
233 info->flash_id += FLASH_S29GL064M;
234 info->sector_count = 128;
235 info->size = 0x00800000;
236 for (i = 0; i < info->sector_count; i++) {
237 info->start[i] = base;
241 break; /* => 16 MB */
243 printf ("Chip: *** unknown ***\n");
244 info->flash_id = FLASH_UNKNOWN;
245 info->sector_count = 0;
252 info->flash_id = FLASH_UNKNOWN;
253 info->sector_count = 0;
257 /* Put FLASH back in read mode */
263 /*-----------------------------------------------------------------------
266 int flash_erase (flash_info_t *info, int s_first, int s_last)
268 FPWV *addr = (FPWV *)(info->start[0]);
269 int flag, prot, sect, ssect, l_sect;
270 ulong start, now, last;
272 debug ("flash_erase: first: %d last: %d\n", s_first, s_last);
274 if ((s_first < 0) || (s_first > s_last)) {
275 if (info->flash_id == FLASH_UNKNOWN) {
276 printf ("- missing\n");
278 printf ("- no sectors to erase\n");
283 if ((info->flash_id == FLASH_UNKNOWN) ||
284 (info->flash_id > FLASH_AMD_COMP)) {
285 printf ("Can't erase unknown flash type %08lx - aborted\n",
291 for (sect=s_first; sect<=s_last; ++sect) {
292 if (info->protect[sect]) {
298 printf ("- Warning: %d protected sectors will not be erased!\n",
304 /* Disable interrupts which might cause a timeout here */
305 flag = disable_interrupts();
308 * Start erase on unprotected sectors.
309 * Since the flash can erase multiple sectors with one command
310 * we take advantage of that by doing the erase in chunks of
313 for (sect = s_first; sect <= s_last; ) {
316 addr[FLASH_CYCLE1] = 0x00AA;
317 addr[FLASH_CYCLE2] = 0x0055;
318 addr[FLASH_CYCLE1] = 0x0080;
319 addr[FLASH_CYCLE1] = 0x00AA;
320 addr[FLASH_CYCLE2] = 0x0055;
322 /* do the erase in chunks of at most 3 sectors */
323 for (ssect = 0; ssect < 3; ssect++) {
324 if ((sect + ssect) > s_last)
326 if (info->protect[sect + ssect] == 0) { /* not protected */
327 addr = (FPWV *)(info->start[sect + ssect]);
329 l_sect = sect + ssect;
332 /* wait at least 80us - let's wait 1 ms */
336 * We wait for the last triggered sector
341 start = get_timer (0);
343 addr = (FPWV *)(info->start[l_sect]);
344 while ((addr[0] & 0x0080) != 0x0080) {
345 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
346 printf ("Timeout\n");
349 /* show that we're waiting */
350 if ((now - last) > 1000) { /* every second */
355 addr = (FPWV *)info->start[0];
356 addr[0] = 0x00F0; /* reset bank */
360 /* re-enable interrupts if necessary */
365 /* reset to read mode */
366 addr = (FPWV *)info->start[0];
367 addr[0] = 0x00F0; /* reset bank */
373 /*-----------------------------------------------------------------------
374 * Copy memory to flash, returns:
377 * 2 - Flash not erased
380 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
386 printf ("unaligned destination not supported\n");
391 printf ("unaligned source not supported\n");
398 data = *((FPWV *)src);
399 if ((rc = write_word_amd(info, (FPW *)wp, data)) != 0) {
412 data = (*((volatile u8 *) src)) | (*((volatile u8 *) (wp + 1))
414 if ((rc = write_word_amd(info, (FPW *)wp, data)) != 0) {
425 /*-----------------------------------------------------------------------
426 * Write a word to Flash for AMD FLASH
427 * A word is 16 or 32 bits, whichever the bus width of the flash bank
428 * (not an individual chip) is.
433 * 2 - Flash not erased
435 static int write_word_amd (flash_info_t *info, FPWV *dest, FPW data)
439 FPWV *base; /* first address in flash bank */
441 /* Check if Flash is (sufficiently) erased */
442 if ((*dest & data) != data) {
446 base = (FPWV *)(info->start[0]);
448 /* Disable interrupts which might cause a timeout here */
449 flag = disable_interrupts();
451 base[FLASH_CYCLE1] = (FPW)0x00AA; /* unlock */
452 base[FLASH_CYCLE2] = (FPW)0x0055; /* unlock */
453 base[FLASH_CYCLE1] = (FPW)0x00A0; /* selects program mode */
455 *dest = data; /* start programming the data */
457 /* re-enable interrupts if necessary */
461 start = get_timer (0);
463 /* data polling for D7 */
464 while ((*dest & (FPW)0x0080) != (data & (FPW)0x0080)) {
465 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
466 *dest = (FPW)0x00F0; /* reset bank */