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[people/ms/u-boot.git] / board / mpc8260ads / flash.c
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WD		 1/*
2 * (C) Copyright 2000, 2001
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * (C) Copyright 2001, Stuart Hughes, Lineo Inc, stuarth@lineo.com
6 * Add support the Sharp chips on the mpc8260ads.
7 * I started with board/ip860/flash.c and made changes I found in
8 * the MTD project by David Schleef.
9 *
10 * See file CREDITS for list of people who contributed to this
11 * project.
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License as
15 * published by the Free Software Foundation; either version 2 of
16 * the License, or (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 * MA 02111-1307 USA
27 */
28
29#include <common.h>
30
31
32flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
33
34#if defined(CFG_ENV_IS_IN_FLASH)
35# ifndef CFG_ENV_ADDR
36# define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
37# endif
38# ifndef CFG_ENV_SIZE
39# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
40# endif
41# ifndef CFG_ENV_SECT_SIZE
42# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
43# endif
44#endif
45
46/*-----------------------------------------------------------------------
47 * Functions
48 */
49static ulong flash_get_size (vu_long *addr, flash_info_t *info);
50static int write_word (flash_info_t *info, ulong dest, ulong data);
51static int clear_block_lock_bit(vu_long * addr);
52
53/*-----------------------------------------------------------------------
54 */
55
56unsigned long flash_init (void)
57{
58#ifndef CONFIG_MPC8260ADS
59 volatile immap_t *immap = (immap_t *)CFG_IMMR;
60 volatile memctl8xx_t *memctl = &immap->im_memctl;
61 volatile ip860_bcsr_t *bcsr = (ip860_bcsr_t *)BCSR_BASE;
62#endif
63 unsigned long size;
64 int i;
65
66 /* Init: enable write,
67 * or we cannot even write flash commands
68 */
69#ifndef CONFIG_MPC8260ADS
70 bcsr->bd_ctrl |= BD_CTRL_FLWE;
71#endif
72
73 for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
74 flash_info[i].flash_id = FLASH_UNKNOWN;
75
76 /* set the default sector offset */
77 }
78
79 /* Static FLASH Bank configuration here - FIXME XXX */
80
81 size = flash_get_size((vu_long *)FLASH_BASE, &flash_info[0]);
82
83 if (flash_info[0].flash_id == FLASH_UNKNOWN) {
84 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
85 size, size<<20);
86 }
87#ifndef CONFIG_MPC8260ADS
88 /* Remap FLASH according to real size */
89 memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size & 0xFFFF8000);
90 memctl->memc_br1 = (CFG_FLASH_BASE & BR_BA_MSK) |
91 (memctl->memc_br1 & ~(BR_BA_MSK));
92#endif
93
94 /* Re-do sizing to get full correct info */
95 size = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
96
97 flash_info[0].size = size;
98
99#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
100 /* monitor protection ON by default */
101 flash_protect(FLAG_PROTECT_SET,
102 CFG_MONITOR_BASE,
103 CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
104 &flash_info[0]);
105#endif
106
107#ifdef CFG_ENV_IS_IN_FLASH
108 /* ENV protection ON by default */
109 flash_protect(FLAG_PROTECT_SET,
110 CFG_ENV_ADDR,
111 CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
112 &flash_info[0]);
113#endif
114 return (size);
115}
116
117/*-----------------------------------------------------------------------
118 */
119void flash_print_info (flash_info_t *info)
120{
121 int i;
122
123 if (info->flash_id == FLASH_UNKNOWN) {
124 printf ("missing or unknown FLASH type\n");
125 return;
126 }
127
128 switch (info->flash_id & FLASH_VENDMASK) {
129 case FLASH_MAN_INTEL: printf ("Intel "); break;
130 case FLASH_MAN_SHARP: printf ("Sharp "); break;
131 default: printf ("Unknown Vendor "); break;
132 }
133
134 switch (info->flash_id & FLASH_TYPEMASK) {
135 case FLASH_28F016SV: printf ("28F016SV (16 Mbit, 32 x 64k)\n");
136 break;
137 case FLASH_28F160S3: printf ("28F160S3 (16 Mbit, 32 x 512K)\n");
138 break;
139 case FLASH_28F320S3: printf ("28F320S3 (32 Mbit, 64 x 512K)\n");
140 break;
141 case FLASH_LH28F016SCT: printf ("28F016SC (16 Mbit, 32 x 64K)\n");
142 break;
143 default: printf ("Unknown Chip Type\n");
144 break;
145 }
146
147 printf (" Size: %ld MB in %d Sectors\n",
148 info->size >> 20, info->sector_count);
149
150 printf (" Sector Start Addresses:");
151 for (i=0; i<info->sector_count; ++i) {
152 if ((i % 5) == 0)
153 printf ("\n ");
154 printf (" %08lX%s",
155 info->start[i],
156 info->protect[i] ? " (RO)" : " "
157 );
158 }
159 printf ("\n");
160}
161
162/*-----------------------------------------------------------------------
163 */
164
165
166/*-----------------------------------------------------------------------
167 */
168
169/*
170 * The following code cannot be run from FLASH!
171 */
172
173static ulong flash_get_size (vu_long *addr, flash_info_t *info)
174{
175 short i;
176 ulong value;
177 ulong base = (ulong)addr;
178 ulong sector_offset;
179
180 /* Write "Intelligent Identifier" command: read Manufacturer ID */
181 *addr = 0x90909090;
182
183 value = addr[0] & 0x00FF00FF;
184 switch (value) {
185 case MT_MANUFACT: /* SHARP, MT or => Intel */
186 case INTEL_ALT_MANU:
187 info->flash_id = FLASH_MAN_INTEL;
188 break;
189 default:
190 printf("unknown manufacturer: %x\n", (unsigned int)value);
191 info->flash_id = FLASH_UNKNOWN;
192 info->sector_count = 0;
193 info->size = 0;
194 return (0); /* no or unknown flash */
195 }
196
197 value = addr[1]; /* device ID */
198
199 switch (value) {
200 case (INTEL_ID_28F016S):
201 info->flash_id += FLASH_28F016SV;
202 info->sector_count = 32;
203 info->size = 0x00400000;
204 sector_offset = 0x20000;
205 break; /* => 2x2 MB */
206
207 case (INTEL_ID_28F160S3):
208 info->flash_id += FLASH_28F160S3;
209 info->sector_count = 32;
210 info->size = 0x00400000;
211 sector_offset = 0x20000;
212 break; /* => 2x2 MB */
213
214 case (INTEL_ID_28F320S3):
215 info->flash_id += FLASH_28F320S3;
216 info->sector_count = 64;
217 info->size = 0x00800000;
218 sector_offset = 0x20000;
219 break; /* => 2x4 MB */
220
221 case SHARP_ID_28F016SCL:
222 case SHARP_ID_28F016SCZ:
223 info->flash_id = FLASH_MAN_SHARP | FLASH_LH28F016SCT;
224 info->sector_count = 32;
225 info->size = 0x00800000;
226 sector_offset = 0x40000;
227 break; /* => 4x2 MB */
228
229
230 default:
231 info->flash_id = FLASH_UNKNOWN;
232 return (0); /* => no or unknown flash */
233
234 }
235
236 /* set up sector start address table */
237 for (i = 0; i < info->sector_count; i++) {
238 info->start[i] = base;
239 base += sector_offset;
240 /* don't know how to check sector protection */
241 info->protect[i] = 0;
242 }
243
244 /*
245 * Prevent writes to uninitialized FLASH.
246 */
247 if (info->flash_id != FLASH_UNKNOWN) {
248 addr = (vu_long *)info->start[0];
249
250 *addr = 0xFFFFFF; /* reset bank to read array mode */
251 }
252
253 return (info->size);
254}
255
256
257/*-----------------------------------------------------------------------
258 */
259
260int flash_erase (flash_info_t *info, int s_first, int s_last)
261{
262 int flag, prot, sect;
263 ulong start, now, last;
264
265 if ((s_first < 0) || (s_first > s_last)) {
266 if (info->flash_id == FLASH_UNKNOWN) {
267 printf ("- missing\n");
268 } else {
269 printf ("- no sectors to erase\n");
270 }
271 return 1;
272 }
273
274 if ( ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL)
275 && ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_SHARP) ) {
276 printf ("Can't erase unknown flash type %08lx - aborted\n",
277 info->flash_id);
278 return 1;
279 }
280
281 prot = 0;
282 for (sect=s_first; sect<=s_last; ++sect) {
283 if (info->protect[sect]) {
284 prot++;
285 }
286 }
287
288 if (prot) {
289 printf ("- Warning: %d protected sectors will not be erased!\n",
290 prot);
291 } else {
292 printf ("\n");
293 }
294
295 /* Make Sure Block Lock Bit is not set. */
296 if(clear_block_lock_bit((vu_long *)(info->start[s_first]))){
297 return 1;
298 }
299
300
301 /* Start erase on unprotected sectors */
302 for (sect = s_first; sect<=s_last; sect++) {
303 if (info->protect[sect] == 0) { /* not protected */
304 vu_long *addr = (vu_long *)(info->start[sect]);
305
306 last = start = get_timer (0);
307
308 /* Disable interrupts which might cause a timeout here */
309 flag = disable_interrupts();
310
311 /* Reset Array */
312 *addr = 0xffffffff;
313 /* Clear Status Register */
314 *addr = 0x50505050;
315 /* Single Block Erase Command */
316 *addr = 0x20202020;
317 /* Confirm */
318 *addr = 0xD0D0D0D0;
319
320 if((info->flash_id & FLASH_TYPEMASK) != FLASH_LH28F016SCT) {
321 /* Resume Command, as per errata update */
322 *addr = 0xD0D0D0D0;
323 }
324
325 /* re-enable interrupts if necessary */
326 if (flag)
327 enable_interrupts();
328
329 /* wait at least 80us - let's wait 1 ms */
330 udelay (1000);
331 while ((*addr & 0x80808080) != 0x80808080) {
332 if(*addr & 0x20202020){
333 printf("Error in Block Erase - Lock Bit may be set!\n");
334 printf("Status Register = 0x%X\n", (uint)*addr);
335 *addr = 0xFFFFFFFF; /* reset bank */
336 return 1;
337 }
338 if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
339 printf ("Timeout\n");
340 *addr = 0xFFFFFFFF; /* reset bank */
341 return 1;
342 }
343 /* show that we're waiting */
344 if ((now - last) > 1000) { /* every second */
345 putc ('.');
346 last = now;
347 }
348 }
349
350 /* reset to read mode */
351 *addr = 0xFFFFFFFF;
352 }
353 }
354
355 printf (" done\n");
356 return 0;
357}
358
359/*-----------------------------------------------------------------------
360 * Copy memory to flash, returns:
361 * 0 - OK
362 * 1 - write timeout
363 * 2 - Flash not erased
364 */
365
366int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
367{
368 ulong cp, wp, data;
369 int i, l, rc;
370
371 wp = (addr & ~3); /* get lower word aligned address */
372
373 /*
374 * handle unaligned start bytes
375 */
376 if ((l = addr - wp) != 0) {
377 data = 0;
378 for (i=0, cp=wp; i<l; ++i, ++cp) {
379 data = (data << 8) | (*(uchar *)cp);
380 }
381 for (; i<4 && cnt>0; ++i) {
382 data = (data << 8) | *src++;
383 --cnt;
384 ++cp;
385 }
386 for (; cnt==0 && i<4; ++i, ++cp) {
387 data = (data << 8) | (*(uchar *)cp);
388 }
389
390 if ((rc = write_word(info, wp, data)) != 0) {
391 return (rc);
392 }
393 wp += 4;
394 }
395
396 /*
397 * handle word aligned part
398 */
399 while (cnt >= 4) {
400 data = 0;
401 for (i=0; i<4; ++i) {
402 data = (data << 8) | *src++;
403 }
404 if ((rc = write_word(info, wp, data)) != 0) {
405 return (rc);
406 }
407 wp += 4;
408 cnt -= 4;
409 }
410
411 if (cnt == 0) {
412 return (0);
413 }
414
415 /*
416 * handle unaligned tail bytes
417 */
418 data = 0;
419 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
420 data = (data << 8) | *src++;
421 --cnt;
422 }
423 for (; i<4; ++i, ++cp) {
424 data = (data << 8) | (*(uchar *)cp);
425 }
426
427 return (write_word(info, wp, data));
428}
429
430/*-----------------------------------------------------------------------
431 * Write a word to Flash, returns:
432 * 0 - OK
433 * 1 - write timeout
434 * 2 - Flash not erased
435 */
436static int write_word (flash_info_t *info, ulong dest, ulong data)
437{
438 vu_long *addr = (vu_long *)dest;
439 ulong start, csr;
440 int flag;
441
442 /* Check if Flash is (sufficiently) erased */
443 if ((*addr & data) != data) {
444 return (2);
445 }
446 /* Disable interrupts which might cause a timeout here */
447 flag = disable_interrupts();
448
449 /* Write Command */
450 *addr = 0x10101010;
451
452 /* Write Data */
453 *addr = data;
454
455 /* re-enable interrupts if necessary */
456 if (flag)
457 enable_interrupts();
458
459 /* data polling for D7 */
460 start = get_timer (0);
461 flag = 0;
462 while (((csr = *addr) & 0x80808080) != 0x80808080) {
463 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
464 flag = 1;
465 break;
466 }
467 }
468 if (csr & 0x40404040) {
469 printf ("CSR indicates write error (%08lx) at %08lx\n", csr, (ulong)addr);
470 flag = 1;
471 }
472
473 /* Clear Status Registers Command */
474 *addr = 0x50505050;
475 /* Reset to read array mode */
476 *addr = 0xFFFFFFFF;
477
478 return (flag);
479}
480
481/*-----------------------------------------------------------------------
482 * Clear Block Lock Bit, returns:
483 * 0 - OK
484 * 1 - Timeout
485 */
486
487static int clear_block_lock_bit(vu_long * addr)
488{
489 ulong start, now;
490
491 /* Reset Array */
492 *addr = 0xffffffff;
493 /* Clear Status Register */
494 *addr = 0x50505050;
495
496 *addr = 0x60606060;
497 *addr = 0xd0d0d0d0;
498
499 start = get_timer (0);
500 while(*addr != 0x80808080){
501 if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
502 printf ("Timeout on clearing Block Lock Bit\n");
503 *addr = 0xFFFFFFFF; /* reset bank */
504 return 1;
505 }
506 }
507 return 0;
508}
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