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wdenkca0e7742004-06-09 15:37:23 +00001/*
2 * (C) Copyright 2002
3 * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
4 *
5 * (C) Copyright 2000-2004
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7 *
8 * See file CREDITS for list of people who contributed to this
9 * project.
10 *
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.
15 *
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.
20 *
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,
24 * MA 02111-1307 USA
25 */
26
27#include <common.h>
28#include <linux/byteorder/swab.h>
29
wdenkca0e7742004-06-09 15:37:23 +000030#define SWAP(x) __swab32(x)
31
32flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
33
34/* Functions */
35static ulong flash_get_size (vu_long *addr, flash_info_t *info);
36static int write_word (flash_info_t *info, ulong dest, ulong data);
37static void flash_get_offsets (ulong base, flash_info_t *info);
38
wdenkca0e7742004-06-09 15:37:23 +000039/*-----------------------------------------------------------------------
40 */
41unsigned long flash_init (void)
42{
43 int i;
44 ulong size = 0;
45
46 for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
47 switch (i) {
48 case 0:
49 flash_get_size ((long *) PHYS_FLASH_1, &flash_info[i]);
50 flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
51 break;
52 case 1:
53 flash_get_size ((long *) PHYS_FLASH_2, &flash_info[i]);
54 flash_get_offsets (PHYS_FLASH_2, &flash_info[i]);
55 break;
56 default:
57 panic ("configured too many flash banks!\n");
58 break;
59 }
60 size += flash_info[i].size;
61 }
62
63 /* Protect monitor and environment sectors */
64 flash_protect ( FLAG_PROTECT_SET,CFG_FLASH_BASE,CFG_FLASH_BASE + monitor_flash_len - 1,&flash_info[0] );
65 flash_protect ( FLAG_PROTECT_SET,CFG_ENV_ADDR,CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0] );
66
67 return size;
68}
69
70/*-----------------------------------------------------------------------
71 */
72static void flash_get_offsets (ulong base, flash_info_t *info)
73{
74 int i;
75
76 if (info->flash_id == FLASH_UNKNOWN) return;
77
78 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) {
79 for (i = 0; i < info->sector_count; i++) {
80 info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
81 info->protect[i] = 0;
82 }
83 }
84}
85
86/*-----------------------------------------------------------------------
87 */
88void flash_print_info (flash_info_t *info)
89{
90 int i;
91
92 if (info->flash_id == FLASH_UNKNOWN) {
93 printf ("missing or unknown FLASH type\n");
94 return;
95 }
96
97 switch (info->flash_id & FLASH_VENDMASK) {
98 case FLASH_MAN_AMD: printf ("AMD "); break;
99 case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
100 default: printf ("Unknown Vendor "); break;
101 }
102
103 switch (info->flash_id & FLASH_TYPEMASK) {
104 case FLASH_AMLV128U: printf ("AM29LV128ML (128Mbit, uniform sector size)\n");
105 break;
106 case FLASH_AMLV320U: printf ("AM29LV320ML (32Mbit, uniform sector size)\n");
107 break;
108 case FLASH_AMLV640U: printf ("AM29LV640ML (64Mbit, uniform sector size)\n");
109 break;
110 case FLASH_AMLV320B: printf ("AM29LV320MB (32Mbit, bottom boot sect)\n");
111 break;
112 default: printf ("Unknown Chip Type\n");
113 break;
114 }
115
116 printf (" Size: %ld MB in %d Sectors\n",
117 info->size >> 20, info->sector_count);
118
119 printf (" Sector Start Addresses:");
120 for (i=0; i<info->sector_count; ++i) {
121 if ((i % 5) == 0)
122 printf ("\n ");
123 printf (" %08lX%s",
124 info->start[i],
125 info->protect[i] ? " (RO)" : " "
126 );
127 }
128 printf ("\n");
129 return;
130}
131
132/*
133 * The following code cannot be run from FLASH!
134 */
135static ulong flash_get_size (vu_long *addr, flash_info_t *info)
136{
137 short i;
138 ulong value;
139 ulong base = (ulong)addr;
140
141 /* Write auto select command: read Manufacturer ID */
142 addr[0x0555] = 0x00AA00AA;
143 addr[0x02AA] = 0x00550055;
144 addr[0x0555] = 0x00900090;
145
146 value = addr[0];
147
148 debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
149
150 switch (value) {
151 case AMD_MANUFACT:
152 debug ("Manufacturer: AMD\n");
153 info->flash_id = FLASH_MAN_AMD;
154 break;
155 case FUJ_MANUFACT:
156 debug ("Manufacturer: FUJITSU\n");
157 info->flash_id = FLASH_MAN_FUJ;
158 break;
159 default:
160 debug ("Manufacturer: *** unknown ***\n");
161 info->flash_id = FLASH_UNKNOWN;
162 info->sector_count = 0;
163 info->size = 0;
164 return (0); /* no or unknown flash */
165 }
166
167 value = addr[1]; /* device ID */
168
169 debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
170
171 switch (value) {
172
173 case AMD_ID_MIRROR:
174 debug ("Mirror Bit flash: addr[14] = %08lX addr[15] = %08lX\n",
175 addr[14], addr[15]);
176 switch(addr[14]) {
177 case AMD_ID_LV128U_2:
178 if (addr[15] != AMD_ID_LV128U_3) {
179 debug ("Chip: AMLV128U -> unknown\n");
180 info->flash_id = FLASH_UNKNOWN;
181 } else {
182 debug ("Chip: AMLV128U\n");
183 info->flash_id += FLASH_AMLV128U;
184 info->sector_count = 256;
185 info->size = 0x02000000;
186 }
187 break; /* => 32 MB */
188 case AMD_ID_LV640U_2:
189 if (addr[15] != AMD_ID_LV640U_3) {
190 debug ("Chip: AMLV640U -> unknown\n");
191 info->flash_id = FLASH_UNKNOWN;
192 } else {
193 debug ("Chip: AMLV640U\n");
194 info->flash_id += FLASH_AMLV640U;
195 info->sector_count = 128;
196 info->size = 0x01000000;
197 }
198 break; /* => 16 MB */
199 case AMD_ID_LV320B_2:
200 if (addr[15] != AMD_ID_LV320B_3) {
201 debug ("Chip: AMLV320B -> unknown\n");
202 info->flash_id = FLASH_UNKNOWN;
203 } else {
204 debug ("Chip: AMLV320B\n");
205 info->flash_id += FLASH_AMLV320B;
206 info->sector_count = 71;
207 info->size = 0x00800000;
208 }
209 break; /* => 8 MB */
210 default:
211 debug ("Chip: *** unknown ***\n");
212 info->flash_id = FLASH_UNKNOWN;
213 break;
214 }
215 break;
216
217 default:
218 info->flash_id = FLASH_UNKNOWN;
219 return (0); /* => no or unknown flash */
220 }
221
222 /* set up sector start address table */
223 switch (value) {
224 case AMD_ID_MIRROR:
225 switch (info->flash_id & FLASH_TYPEMASK) {
226 /* only known types here - no default */
227 case FLASH_AMLV128U:
228 case FLASH_AMLV640U:
229 case FLASH_AMLV320U:
230 for (i = 0; i < info->sector_count; i++) {
231 info->start[i] = base;
232 base += 0x20000;
233 }
234 break;
235 case FLASH_AMLV320B:
236 for (i = 0; i < info->sector_count; i++) {
237 info->start[i] = base;
238 /*
239 * The first 8 sectors are 8 kB,
240 * all the other ones are 64 kB
241 */
242 base += (i < 8)
243 ? 2 * ( 8 << 10)
244 : 2 * (64 << 10);
245 }
246 break;
247 }
248 break;
249
250 default:
251 return (0);
252 break;
253 }
254
255#if 0
256 /* check for protected sectors */
257 for (i = 0; i < info->sector_count; i++) {
258 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
259 /* D0 = 1 if protected */
260 addr = (volatile unsigned long *)(info->start[i]);
261 info->protect[i] = addr[2] & 1;
262 }
263#endif
264
265 /*
266 * Prevent writes to uninitialized FLASH.
267 */
268 if (info->flash_id != FLASH_UNKNOWN) {
269 addr = (volatile unsigned long *)info->start[0];
270
271 *addr = 0x00F000F0; /* reset bank */
272 }
273
274 return (info->size);
275}
276
277
278/*-----------------------------------------------------------------------
279 */
280
281int flash_erase (flash_info_t *info, int s_first, int s_last)
282{
283 vu_long *addr = (vu_long*)(info->start[0]);
284 int flag, prot, sect, l_sect;
285 ulong start, now, last;
286
287 debug ("flash_erase: first: %d last: %d\n", s_first, s_last);
288
289 if ((s_first < 0) || (s_first > s_last)) {
290 if (info->flash_id == FLASH_UNKNOWN) {
291 printf ("- missing\n");
292 } else {
293 printf ("- no sectors to erase\n");
294 }
295 return 1;
296 }
297
298 if ((info->flash_id == FLASH_UNKNOWN) ||
299 (info->flash_id > FLASH_AMD_COMP)) {
300 printf ("Can't erase unknown flash type %08lx - aborted\n",
301 info->flash_id);
302 return 1;
303 }
304
305 prot = 0;
306 for (sect=s_first; sect<=s_last; ++sect) {
307 if (info->protect[sect]) {
308 prot++;
309 }
310 }
311
312 if (prot) {
313 printf ("- Warning: %d protected sectors will not be erased!\n",
314 prot);
315 } else {
316 printf ("\n");
317 }
318
319 l_sect = -1;
320
321 /* Disable interrupts which might cause a timeout here */
322 flag = disable_interrupts();
323
324 addr[0x0555] = 0x00AA00AA;
325 addr[0x02AA] = 0x00550055;
326 addr[0x0555] = 0x00800080;
327 addr[0x0555] = 0x00AA00AA;
328 addr[0x02AA] = 0x00550055;
329
330 /* Start erase on unprotected sectors */
331 for (sect = s_first; sect<=s_last; sect++) {
332 if (info->protect[sect] == 0) { /* not protected */
333 addr = (vu_long*)(info->start[sect]);
334 addr[0] = 0x00300030;
335 l_sect = sect;
336 }
337 }
338
339 /* re-enable interrupts if necessary */
340 if (flag)
341 enable_interrupts();
342
343 /* wait at least 80us - let's wait 1 ms */
344 udelay (1000);
345
346 /*
347 * We wait for the last triggered sector
348 */
349 if (l_sect < 0)
350 goto DONE;
351
352 start = get_timer (0);
353 last = start;
354 addr = (vu_long*)(info->start[l_sect]);
355 while ((addr[0] & 0x00800080) != 0x00800080) {
356 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
357 printf ("Timeout\n");
358 return 1;
359 }
360 /* show that we're waiting */
361 if ((now - last) > 100000) { /* every second */
362 putc ('.');
363 last = now;
364 }
365 }
366
367DONE:
368 /* reset to read mode */
369 addr = (volatile unsigned long *)info->start[0];
370 addr[0] = 0x00F000F0; /* reset bank */
371
372 printf (" done\n");
373 return 0;
374}
375
376/*-----------------------------------------------------------------------
377 * Copy memory to flash, returns:
378 * 0 - OK
379 * 1 - write timeout
380 * 2 - Flash not erased
381 */
382
383int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
384{
385 ulong cp, wp, data;
386 int i, l, rc;
387
388 wp = (addr & ~3); /* get lower word aligned address */
389
390 /*
391 * handle unaligned start bytes
392 */
393 if ((l = addr - wp) != 0) {
394 data = 0;
395 for (i=0, cp=wp; i<l; ++i, ++cp) {
396 data = (data << 8) | (*(uchar *)cp);
397 }
398 for (; i<4 && cnt>0; ++i) {
399 data = (data << 8) | *src++;
400 --cnt;
401 ++cp;
402 }
403 for (; cnt==0 && i<4; ++i, ++cp) {
404 data = (data << 8) | (*(uchar *)cp);
405 }
406
407 if ((rc = write_word(info, wp, SWAP(data))) != 0) {
408 return (rc);
409 }
410 wp += 4;
411 }
412
413 /*
414 * handle word aligned part
415 */
416 while (cnt >= 4) {
417 data = 0;
418 for (i=0; i<4; ++i) {
419 data = (data << 8) | *src++;
420 }
421 if ((rc = write_word(info, wp, SWAP(data))) != 0) {
422 return (rc);
423 }
424 wp += 4;
425 cnt -= 4;
426 }
427
428 if (cnt == 0) {
429 return (0);
430 }
431
432 /*
433 * handle unaligned tail bytes
434 */
435 data = 0;
436 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
437 data = (data << 8) | *src++;
438 --cnt;
439 }
440 for (; i<4; ++i, ++cp) {
441 data = (data << 8) | (*(uchar *)cp);
442 }
443
444 return (write_word(info, wp, SWAP(data)));
445}
446
447/*-----------------------------------------------------------------------
448 * Write a word to Flash, returns:
449 * 0 - OK
450 * 1 - write timeout
451 * 2 - Flash not erased
452 */
453static int write_word (flash_info_t *info, ulong dest, ulong data)
454{
455 vu_long *addr = (vu_long*)(info->start[0]);
456 ulong start;
wdenkca0e7742004-06-09 15:37:23 +0000457 int flag;
wdenkca0e7742004-06-09 15:37:23 +0000458
459 /* Check if Flash is (sufficiently) erased */
460 if ((*((vu_long *)dest) & data) != data) {
461 return (2);
462 }
463
464 /* Disable interrupts which might cause a timeout here */
465 flag = disable_interrupts();
466
467 addr[0x0555] = 0x00AA00AA;
468 addr[0x02AA] = 0x00550055;
469 addr[0x0555] = 0x00A000A0;
470
471 *((vu_long *)dest) = data;
472
473 /* re-enable interrupts if necessary */
474 if (flag)
475 enable_interrupts();
476
477 /* data polling for D7 */
478 start = get_timer (0);
479 while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
480 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
481 return (1);
482 }
483 }
484 return (0);
485}