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,
32 flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
35 * CPU to flash interface is 32-bit, so make declaration accordingly
37 typedef unsigned short FLASH_PORT_WIDTH;
38 typedef volatile unsigned short FLASH_PORT_WIDTHV;
40 #define FPW FLASH_PORT_WIDTH
41 #define FPWV FLASH_PORT_WIDTHV
43 #define FLASH_CYCLE1 0x0555
44 #define FLASH_CYCLE2 0x02AA
46 /*-----------------------------------------------------------------------
49 static ulong flash_get_size(FPWV *addr, flash_info_t *info);
50 static void flash_reset(flash_info_t *info);
51 static int write_word_amd(flash_info_t *info, FPWV *dest, FPW data);
52 static flash_info_t *flash_get_info(ulong base);
54 /*-----------------------------------------------------------------------
57 * sets up flash_info and returns size of FLASH (bytes)
59 unsigned long flash_init (void)
61 unsigned long size = 0;
62 ulong flashbase = CFG_FLASH_BASE;
64 /* Init: no FLASHes known */
65 memset(&flash_info[0], 0, sizeof(flash_info_t));
68 flash_get_size((FPW *)flashbase, &flash_info[0]);
70 size = flash_info[0].size;
72 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
73 /* monitor protection ON by default */
74 flash_protect(FLAG_PROTECT_SET,
76 CFG_MONITOR_BASE+monitor_flash_len-1,
77 flash_get_info(CFG_MONITOR_BASE));
80 #ifdef CFG_ENV_IS_IN_FLASH
81 /* ENV protection ON by default */
82 flash_protect(FLAG_PROTECT_SET,
84 CFG_ENV_ADDR+CFG_ENV_SIZE-1,
85 flash_get_info(CFG_ENV_ADDR));
88 return size ? size : 1;
91 /*-----------------------------------------------------------------------
93 static void flash_reset(flash_info_t *info)
95 FPWV *base = (FPWV *)(info->start[0]);
97 /* Put FLASH back in read mode */
98 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
99 *base = (FPW)0x00FF; /* Intel Read Mode */
100 else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)
101 *base = (FPW)0x00F0; /* AMD Read Mode */
104 /*-----------------------------------------------------------------------
107 static flash_info_t *flash_get_info(ulong base)
113 for (i = 0; i < CFG_MAX_FLASH_BANKS; i ++) {
114 info = & flash_info[i];
115 if (info->size && info->start[0] <= base &&
116 base <= info->start[0] + info->size - 1)
120 return i == CFG_MAX_FLASH_BANKS ? 0 : info;
123 /*-----------------------------------------------------------------------
126 void flash_print_info (flash_info_t *info)
130 if (info->flash_id == FLASH_UNKNOWN) {
131 printf ("missing or unknown FLASH type\n");
135 switch (info->flash_id & FLASH_VENDMASK) {
136 case FLASH_MAN_AMD: printf ("AMD "); break;
137 case FLASH_MAN_BM: printf ("BRIGHT MICRO "); break;
138 case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
139 case FLASH_MAN_SST: printf ("SST "); break;
140 case FLASH_MAN_STM: printf ("STM "); break;
141 case FLASH_MAN_INTEL: printf ("INTEL "); break;
142 default: printf ("Unknown Vendor "); break;
145 switch (info->flash_id & FLASH_TYPEMASK) {
146 case FLASH_S29GL064M:
147 printf ("S29GL064M-R6 (64Mbit, uniform sector size)\n");
150 printf ("Unknown Chip Type\n");
154 printf (" Size: %ld MB in %d Sectors\n",
158 printf (" Sector Start Addresses:");
160 for (i=0; i<info->sector_count; ++i) {
166 info->protect[i] ? " (RO)" : " ");
172 /*-----------------------------------------------------------------------
176 * The following code cannot be run from FLASH!
179 ulong flash_get_size (FPWV *addr, flash_info_t *info)
182 ulong base = (ulong)addr;
184 /* Write auto select command: read Manufacturer ID */
185 /* Write auto select command sequence and test FLASH answer */
186 addr[FLASH_CYCLE1] = (FPW)0x00AA; /* for AMD, Intel ignores this */
187 addr[FLASH_CYCLE2] = (FPW)0x0055; /* for AMD, Intel ignores this */
188 addr[FLASH_CYCLE1] = (FPW)0x0090; /* selects Intel or AMD */
190 /* The manufacturer codes are only 1 byte, so just use 1 byte.
191 * This works for any bus width and any FLASH device width.
194 switch (addr[0] & 0xff) {
196 case (uchar)AMD_MANUFACT:
197 printf ("Manufacturer: AMD (Spansion)\n");
198 info->flash_id = FLASH_MAN_AMD;
201 case (uchar)INTEL_MANUFACT:
202 printf ("Manufacturer: Intel (not supported yet)\n");
203 info->flash_id = FLASH_MAN_INTEL;
207 info->flash_id = FLASH_UNKNOWN;
208 info->sector_count = 0;
213 /* Check 16 bits or 32 bits of ID so work on 32 or 16 bit bus. */
214 if (info->flash_id != FLASH_UNKNOWN) switch ((FPW)addr[1]) {
217 printf ("Mirror Bit flash: addr[14] = %08X addr[15] = %08X\n",
220 switch(addr[14] & 0xffff) {
221 case (AMD_ID_GL064M_2 & 0xffff):
222 if (addr[15] != (AMD_ID_GL064M_3 & 0xffff)) {
223 printf ("Chip: S29GLxxxM -> unknown\n");
224 info->flash_id = FLASH_UNKNOWN;
225 info->sector_count = 0;
228 printf ("Chip: S29GL064M-R6\n");
229 info->flash_id += FLASH_S29GL064M;
230 info->sector_count = 128;
231 info->size = 0x00800000;
232 for (i = 0; i < info->sector_count; i++) {
233 info->start[i] = base;
237 break; /* => 16 MB */
239 printf ("Chip: *** unknown ***\n");
240 info->flash_id = FLASH_UNKNOWN;
241 info->sector_count = 0;
248 info->flash_id = FLASH_UNKNOWN;
249 info->sector_count = 0;
253 /* Put FLASH back in read mode */
259 /*-----------------------------------------------------------------------
262 int flash_erase (flash_info_t *info, int s_first, int s_last)
264 FPWV *addr = (FPWV *)(info->start[0]);
265 int flag, prot, sect, ssect, l_sect;
266 ulong start, now, last;
268 printf ("flash_erase: first: %d last: %d\n", s_first, s_last);
270 if ((s_first < 0) || (s_first > s_last)) {
271 if (info->flash_id == FLASH_UNKNOWN) {
272 printf ("- missing\n");
274 printf ("- no sectors to erase\n");
279 if ((info->flash_id == FLASH_UNKNOWN) ||
280 (info->flash_id > FLASH_AMD_COMP)) {
281 printf ("Can't erase unknown flash type %08lx - aborted\n",
287 for (sect=s_first; sect<=s_last; ++sect) {
288 if (info->protect[sect]) {
294 printf ("- Warning: %d protected sectors will not be erased!\n",
300 /* Disable interrupts which might cause a timeout here */
301 flag = disable_interrupts();
304 * Start erase on unprotected sectors.
305 * Since the flash can erase multiple sectors with one command
306 * we take advantage of that by doing the erase in chunks of
309 for (sect = s_first; sect <= s_last; ) {
312 addr[FLASH_CYCLE1] = 0x00AA;
313 addr[FLASH_CYCLE2] = 0x0055;
314 addr[FLASH_CYCLE1] = 0x0080;
315 addr[FLASH_CYCLE1] = 0x00AA;
316 addr[FLASH_CYCLE2] = 0x0055;
318 /* do the erase in chunks of at most 3 sectors */
319 for (ssect = 0; ssect < 3; ssect++) {
320 if ((sect + ssect) > s_last)
322 if (info->protect[sect + ssect] == 0) { /* not protected */
323 addr = (FPWV *)(info->start[sect + ssect]);
325 l_sect = sect + ssect;
328 /* wait at least 80us - let's wait 1 ms */
332 * We wait for the last triggered sector
337 start = get_timer (0);
339 addr = (FPWV *)(info->start[l_sect]);
340 while ((addr[0] & 0x0080) != 0x0080) {
341 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
342 printf ("Timeout\n");
345 /* show that we're waiting */
346 if ((now - last) > 1000) { /* every second */
351 addr = (FPWV *)info->start[0];
352 addr[0] = 0x00F0; /* reset bank */
356 /* re-enable interrupts if necessary */
361 /* reset to read mode */
362 addr = (FPWV *)info->start[0];
363 addr[0] = 0x00F0; /* reset bank */
369 /*-----------------------------------------------------------------------
370 * Copy memory to flash, returns:
373 * 2 - Flash not erased
376 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
382 printf ("unaligned destination not supported\n");
387 printf ("unaligned source not supported\n");
394 data = *((FPWV *)src);
395 if ((rc = write_word_amd(info, (FPW *)wp, data)) != 0) {
408 data = (*((volatile u8 *) src)) | (*((volatile u8 *) (wp + 1))
410 if ((rc = write_word_amd(info, (FPW *)wp, data)) != 0) {
421 /*-----------------------------------------------------------------------
422 * Write a word to Flash for AMD FLASH
423 * A word is 16 or 32 bits, whichever the bus width of the flash bank
424 * (not an individual chip) is.
429 * 2 - Flash not erased
431 static int write_word_amd (flash_info_t *info, FPWV *dest, FPW data)
435 FPWV *base; /* first address in flash bank */
437 /* Check if Flash is (sufficiently) erased */
438 if ((*dest & data) != data) {
442 base = (FPWV *)(info->start[0]);
444 /* Disable interrupts which might cause a timeout here */
445 flag = disable_interrupts();
447 base[FLASH_CYCLE1] = (FPW)0x00AA; /* unlock */
448 base[FLASH_CYCLE2] = (FPW)0x0055; /* unlock */
449 base[FLASH_CYCLE1] = (FPW)0x00A0; /* selects program mode */
451 *dest = data; /* start programming the data */
453 /* re-enable interrupts if necessary */
457 start = get_timer (0);
459 /* data polling for D7 */
460 while ((*dest & (FPW)0x0080) != (data & (FPW)0x0080)) {
461 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
462 *dest = (FPW)0x00F0; /* reset bank */