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[u-boot.git] / board / g2000 / strataflash.c
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aee2fa27
SR		 1/*
2 * (C) Copyright 2002
3 * Brad Kemp, Seranoa Networks, [email protected]
4 *
1a459660 5 * SPDX-License-Identifier: GPL-2.0+
aee2fa27
SR		 6 */
7
8#include <common.h>
9#include <asm/processor.h>
10
11#undef DEBUG_FLASH
12/*
13 * This file implements a Common Flash Interface (CFI) driver for ppcboot.
14 * The width of the port and the width of the chips are determined at initialization.
15 * These widths are used to calculate the address for access CFI data structures.
16 * It has been tested on an Intel Strataflash implementation.
17 *
18 * References
19 * JEDEC Standard JESD68 - Common Flash Interface (CFI)
20 * JEDEC Standard JEP137-A Common Flash Interface (CFI) ID Codes
21 * Intel Application Note 646 Common Flash Interface (CFI) and Command Sets
22 * Intel 290667-008 3 Volt Intel StrataFlash Memory datasheet
23 *
24 * TODO
25 * Use Primary Extended Query table (PRI) and Alternate Algorithm Query Table (ALT) to determine if protection is available
26 * Add support for other command sets Use the PRI and ALT to determine command set
27 * Verify erase and program timeouts.
28 */
29
30#define FLASH_CMD_CFI 0x98
31#define FLASH_CMD_READ_ID 0x90
32#define FLASH_CMD_RESET 0xff
33#define FLASH_CMD_BLOCK_ERASE 0x20
34#define FLASH_CMD_ERASE_CONFIRM 0xD0
35#define FLASH_CMD_WRITE 0x40
36#define FLASH_CMD_PROTECT 0x60
37#define FLASH_CMD_PROTECT_SET 0x01
38#define FLASH_CMD_PROTECT_CLEAR 0xD0
39#define FLASH_CMD_CLEAR_STATUS 0x50
40#define FLASH_CMD_WRITE_TO_BUFFER 0xE8
41#define FLASH_CMD_WRITE_BUFFER_CONFIRM 0xD0
42
43#define FLASH_STATUS_DONE 0x80
44#define FLASH_STATUS_ESS 0x40
45#define FLASH_STATUS_ECLBS 0x20
46#define FLASH_STATUS_PSLBS 0x10
47#define FLASH_STATUS_VPENS 0x08
48#define FLASH_STATUS_PSS 0x04
49#define FLASH_STATUS_DPS 0x02
50#define FLASH_STATUS_R 0x01
51#define FLASH_STATUS_PROTECT 0x01
52
53#define FLASH_OFFSET_CFI 0x55
54#define FLASH_OFFSET_CFI_RESP 0x10
55#define FLASH_OFFSET_WTOUT 0x1F
56#define FLASH_OFFSET_WBTOUT 0x20
57#define FLASH_OFFSET_ETOUT 0x21
58#define FLASH_OFFSET_CETOUT 0x22
59#define FLASH_OFFSET_WMAX_TOUT 0x23
60#define FLASH_OFFSET_WBMAX_TOUT 0x24
61#define FLASH_OFFSET_EMAX_TOUT 0x25
62#define FLASH_OFFSET_CEMAX_TOUT 0x26
63#define FLASH_OFFSET_SIZE 0x27
64#define FLASH_OFFSET_INTERFACE 0x28
65#define FLASH_OFFSET_BUFFER_SIZE 0x2A
66#define FLASH_OFFSET_NUM_ERASE_REGIONS 0x2C
67#define FLASH_OFFSET_ERASE_REGIONS 0x2D
68#define FLASH_OFFSET_PROTECT 0x02
69#define FLASH_OFFSET_USER_PROTECTION 0x85
70#define FLASH_OFFSET_INTEL_PROTECTION 0x81
71
aee2fa27
SR		 72#define FLASH_MAN_CFI 0x01000000
73
aee2fa27
SR		 74typedef union {
75 unsigned char c;
76 unsigned short w;
77 unsigned long l;
78} cfiword_t;
79
80typedef union {
81 unsigned char * cp;
82 unsigned short *wp;
83 unsigned long *lp;
84} cfiptr_t;
85
86#define NUM_ERASE_REGIONS 4
87
6d0f6bcf 88flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
aee2fa27 89
aee2fa27
SR		 90/*-----------------------------------------------------------------------
91 * Functions
92 */
93
aee2fa27
SR		 94static void flash_add_byte(flash_info_t *info, cfiword_t * cword, uchar c);
95static void flash_make_cmd(flash_info_t * info, uchar cmd, void * cmdbuf);
96static void flash_write_cmd(flash_info_t * info, int sect, uchar offset, uchar cmd);
97static int flash_isequal(flash_info_t * info, int sect, uchar offset, uchar cmd);
98static int flash_isset(flash_info_t * info, int sect, uchar offset, uchar cmd);
99static int flash_detect_cfi(flash_info_t * info);
100static ulong flash_get_size (ulong base, int banknum);
101static int flash_write_cfiword (flash_info_t *info, ulong dest, cfiword_t cword);
102static int flash_full_status_check(flash_info_t * info, ulong sector, ulong tout, char * prompt);
6d0f6bcf 103#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
aee2fa27
SR		 104static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, int len);
105#endif
106/*-----------------------------------------------------------------------
107 * create an address based on the offset and the port width
108 */
109inline uchar * flash_make_addr(flash_info_t * info, int sect, int offset)
110{
111 return ((uchar *)(info->start[sect] + (offset * info->portwidth)));
112}
113/*-----------------------------------------------------------------------
114 * read a character at a port width address
115 */
116inline uchar flash_read_uchar(flash_info_t * info, uchar offset)
117{
118 uchar *cp;
119 cp = flash_make_addr(info, 0, offset);
120 return (cp[info->portwidth - 1]);
121}
122
123/*-----------------------------------------------------------------------
124 * read a short word by swapping for ppc format.
125 */
126ushort flash_read_ushort(flash_info_t * info, int sect, uchar offset)
127{
128 uchar * addr;
129
130 addr = flash_make_addr(info, sect, offset);
131 return ((addr[(2*info->portwidth) - 1] << 8) | addr[info->portwidth - 1]);
132
133}
134
135/*-----------------------------------------------------------------------
136 * read a long word by picking the least significant byte of each maiximum
137 * port size word. Swap for ppc format.
138 */
139ulong flash_read_long(flash_info_t * info, int sect, uchar offset)
140{
141 uchar * addr;
142
143 addr = flash_make_addr(info, sect, offset);
144 return ( (addr[(2*info->portwidth) - 1] << 24 ) | (addr[(info->portwidth) -1] << 16) |
145 (addr[(4*info->portwidth) - 1] << 8) | addr[(3*info->portwidth) - 1]);
146
147}
148
149/*-----------------------------------------------------------------------
150 */
151unsigned long flash_init (void)
152{
153 unsigned long size;
154 int i;
155 unsigned long address;
156
157
158 /* The flash is positioned back to back, with the demultiplexing of the chip
159 * based on the A24 address line.
160 *
161 */
162
6d0f6bcf 163 address = CONFIG_SYS_FLASH_BASE;
aee2fa27
SR		 164 size = 0;
165
166 /* Init: no FLASHes known */
6d0f6bcf 167 for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
aee2fa27
SR		 168 flash_info[i].flash_id = FLASH_UNKNOWN;
169 size += flash_info[i].size = flash_get_size(address, i);
6d0f6bcf 170 address += CONFIG_SYS_FLASH_INCREMENT;
aee2fa27
SR		 171 if (flash_info[0].flash_id == FLASH_UNKNOWN) {
172 printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",i,
173 flash_info[0].size, flash_info[i].size<<20);
174 }
175 }
176
177#if 0 /* test-only */
178 /* Monitor protection ON by default */
6d0f6bcf
JCPV		 179#if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE)
180 for(i=0; flash_info[0].start[i] < CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_MONITOR_LEN-1; i++)
aee2fa27
SR		 181 (void)flash_real_protect(&flash_info[0], i, 1);
182#endif
183#else
184 /* monitor protection ON by default */
185 flash_protect (FLAG_PROTECT_SET,
6d0f6bcf 186 - CONFIG_SYS_MONITOR_LEN,
aee2fa27
SR		 187 - 1, &flash_info[1]);
188#endif
189
190 return (size);
191}
192
193/*-----------------------------------------------------------------------
194 */
195int flash_erase (flash_info_t *info, int s_first, int s_last)
196{
197 int rcode = 0;
198 int prot;
199 int sect;
200
201 if( info->flash_id != FLASH_MAN_CFI) {
202 printf ("Can't erase unknown flash type - aborted\n");
203 return 1;
204 }
205 if ((s_first < 0) || (s_first > s_last)) {
206 printf ("- no sectors to erase\n");
207 return 1;
208 }
209
210 prot = 0;
211 for (sect=s_first; sect<=s_last; ++sect) {
212 if (info->protect[sect]) {
213 prot++;
214 }
215 }
216 if (prot) {
217 printf ("- Warning: %d protected sectors will not be erased!\n",
218 prot);
219 } else {
220 printf ("\n");
221 }
222
223
224 for (sect = s_first; sect<=s_last; sect++) {
225 if (info->protect[sect] == 0) { /* not protected */
226 flash_write_cmd(info, sect, 0, FLASH_CMD_CLEAR_STATUS);
227 flash_write_cmd(info, sect, 0, FLASH_CMD_BLOCK_ERASE);
228 flash_write_cmd(info, sect, 0, FLASH_CMD_ERASE_CONFIRM);
229
230 if(flash_full_status_check(info, sect, info->erase_blk_tout, "erase")) {
231 rcode = 1;
232 } else
233 printf(".");
234 }
235 }
236 printf (" done\n");
237 return rcode;
238}
239
240/*-----------------------------------------------------------------------
241 */
242void flash_print_info (flash_info_t *info)
243{
244 int i;
245
246 if (info->flash_id != FLASH_MAN_CFI) {
247 printf ("missing or unknown FLASH type\n");
248 return;
249 }
250
251 printf("CFI conformant FLASH (%d x %d)",
252 (info->portwidth << 3 ), (info->chipwidth << 3 ));
253 printf (" Size: %ld MB in %d Sectors\n",
254 info->size >> 20, info->sector_count);
255 printf(" Erase timeout %ld ms, write timeout %ld ms, buffer write timeout %ld ms, buffer size %d\n",
256 info->erase_blk_tout, info->write_tout, info->buffer_write_tout, info->buffer_size);
257
258 printf (" Sector Start Addresses:");
259 for (i=0; i<info->sector_count; ++i) {
6d0f6bcf 260#ifdef CONFIG_SYS_FLASH_EMPTY_INFO
aee2fa27
SR		 261 int k;
262 int size;
263 int erased;
264 volatile unsigned long *flash;
265
efe2a4d5
WD		 266 /*
267 * Check if whole sector is erased
268 */
269 if (i != (info->sector_count-1))
270 size = info->start[i+1] - info->start[i];
271 else
272 size = info->start[0] + info->size - info->start[i];
273 erased = 1;
274 flash = (volatile unsigned long *)info->start[i];
275 size = size >> 2; /* divide by 4 for longword access */
276 for (k=0; k<size; k++)
277 {
278 if (*flash++ != 0xffffffff)
279 {
280 erased = 0;
281 break;
282 }
283 }
aee2fa27
SR		 284
285 if ((i % 5) == 0)
286 printf ("\n ");
efe2a4d5 287 /* print empty and read-only info */
aee2fa27
SR		 288 printf (" %08lX%s%s",
289 info->start[i],
290 erased ? " E" : " ",
291 info->protect[i] ? "RO " : " ");
292#else
293 if ((i % 5) == 0)
294 printf ("\n ");
295 printf (" %08lX%s",
296 info->start[i],
297 info->protect[i] ? " (RO)" : " ");
298#endif
299 }
300 printf ("\n");
301 return;
302}
303
304/*-----------------------------------------------------------------------
305 * Copy memory to flash, returns:
306 * 0 - OK
307 * 1 - write timeout
308 * 2 - Flash not erased
309 */
310int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
311{
312 ulong wp;
313 ulong cp;
314 int aln;
315 cfiword_t cword;
316 int i, rc;
317
318 /* get lower aligned address */
319 wp = (addr & ~(info->portwidth - 1));
320
321 /* handle unaligned start */
322 if((aln = addr - wp) != 0) {
323 cword.l = 0;
324 cp = wp;
325 for(i=0;i<aln; ++i, ++cp)
326 flash_add_byte(info, &cword, (*(uchar *)cp));
327
328 for(; (i< info->portwidth) && (cnt > 0) ; i++) {
329 flash_add_byte(info, &cword, *src++);
330 cnt--;
331 cp++;
332 }
333 for(; (cnt == 0) && (i < info->portwidth); ++i, ++cp)
334 flash_add_byte(info, &cword, (*(uchar *)cp));
335 if((rc = flash_write_cfiword(info, wp, cword)) != 0)
336 return rc;
337 wp = cp;
338 }
339
6d0f6bcf 340#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
aee2fa27
SR		 341 while(cnt >= info->portwidth) {
342 i = info->buffer_size > cnt? cnt: info->buffer_size;
343 if((rc = flash_write_cfibuffer(info, wp, src,i)) != ERR_OK)
344 return rc;
345 wp += i;
346 src += i;
347 cnt -=i;
348 }
349#else
350 /* handle the aligned part */
351 while(cnt >= info->portwidth) {
352 cword.l = 0;
353 for(i = 0; i < info->portwidth; i++) {
354 flash_add_byte(info, &cword, *src++);
355 }
356 if((rc = flash_write_cfiword(info, wp, cword)) != 0)
357 return rc;
358 wp += info->portwidth;
359 cnt -= info->portwidth;
360 }
6d0f6bcf 361#endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */
aee2fa27
SR		 362 if (cnt == 0) {
363 return (0);
364 }
365
366 /*
367 * handle unaligned tail bytes
368 */
369 cword.l = 0;
370 for (i=0, cp=wp; (i<info->portwidth) && (cnt>0); ++i, ++cp) {
371 flash_add_byte(info, &cword, *src++);
372 --cnt;
373 }
374 for (; i<info->portwidth; ++i, ++cp) {
375 flash_add_byte(info, & cword, (*(uchar *)cp));
376 }
377
378 return flash_write_cfiword(info, wp, cword);
379}
380
381/*-----------------------------------------------------------------------
382 */
383int flash_real_protect(flash_info_t *info, long sector, int prot)
384{
385 int retcode = 0;
386
387 flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS);
388 flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT);
389 if(prot)
390 flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT_SET);
391 else
392 flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT_CLEAR);
393
394 if((retcode = flash_full_status_check(info, sector, info->erase_blk_tout,
395 prot?"protect":"unprotect")) == 0) {
396
397 info->protect[sector] = prot;
398 /* Intel's unprotect unprotects all locking */
399 if(prot == 0) {
400 int i;
401 for(i = 0 ; i<info->sector_count; i++) {
402 if(info->protect[i])
403 flash_real_protect(info, i, 1);
404 }
405 }
406 }
407
408 return retcode;
409}
410/*-----------------------------------------------------------------------
411 * wait for XSR.7 to be set. Time out with an error if it does not.
412 * This routine does not set the flash to read-array mode.
413 */
414static int flash_status_check(flash_info_t * info, ulong sector, ulong tout, char * prompt)
415{
416 ulong start;
417
418 /* Wait for command completion */
419 start = get_timer (0);
420 while(!flash_isset(info, sector, 0, FLASH_STATUS_DONE)) {
421 if (get_timer(start) > info->erase_blk_tout) {
422 printf("Flash %s timeout at address %lx\n", prompt, info->start[sector]);
423 flash_write_cmd(info, sector, 0, FLASH_CMD_RESET);
424 return ERR_TIMOUT;
425 }
426 }
427 return ERR_OK;
428}
429/*-----------------------------------------------------------------------
430 * Wait for XSR.7 to be set, if it times out print an error, otherwise do a full status check.
431 * This routine sets the flash to read-array mode.
432 */
433static int flash_full_status_check(flash_info_t * info, ulong sector, ulong tout, char * prompt)
434{
435 int retcode;
436 retcode = flash_status_check(info, sector, tout, prompt);
437 if((retcode == ERR_OK) && !flash_isequal(info,sector, 0, FLASH_STATUS_DONE)) {
438 retcode = ERR_INVAL;
439 printf("Flash %s error at address %lx\n", prompt,info->start[sector]);
440 if(flash_isset(info, sector, 0, FLASH_STATUS_ECLBS | FLASH_STATUS_PSLBS)){
441 printf("Command Sequence Error.\n");
442 } else if(flash_isset(info, sector, 0, FLASH_STATUS_ECLBS)){
443 printf("Block Erase Error.\n");
efe2a4d5 444 retcode = ERR_NOT_ERASED;
aee2fa27
SR		 445 } else if (flash_isset(info, sector, 0, FLASH_STATUS_PSLBS)) {
446 printf("Locking Error\n");
447 }
448 if(flash_isset(info, sector, 0, FLASH_STATUS_DPS)){
449 printf("Block locked.\n");
450 retcode = ERR_PROTECTED;
451 }
452 if(flash_isset(info, sector, 0, FLASH_STATUS_VPENS))
453 printf("Vpp Low Error.\n");
454 }
455 flash_write_cmd(info, sector, 0, FLASH_CMD_RESET);
456 return retcode;
457}
458/*-----------------------------------------------------------------------
459 */
460static void flash_add_byte(flash_info_t *info, cfiword_t * cword, uchar c)
461{
462 switch(info->portwidth) {
463 case FLASH_CFI_8BIT:
464 cword->c = c;
465 break;
466 case FLASH_CFI_16BIT:
467 cword->w = (cword->w << 8) | c;
468 break;
469 case FLASH_CFI_32BIT:
470 cword->l = (cword->l << 8) | c;
471 }
472}
473
474
475/*-----------------------------------------------------------------------
476 * make a proper sized command based on the port and chip widths
477 */
478static void flash_make_cmd(flash_info_t * info, uchar cmd, void * cmdbuf)
479{
480 int i;
481 uchar *cp = (uchar *)cmdbuf;
482 for(i=0; i< info->portwidth; i++)
483 *cp++ = ((i+1) % info->chipwidth) ? '\0':cmd;
484}
485
486/*
487 * Write a proper sized command to the correct address
488 */
489static void flash_write_cmd(flash_info_t * info, int sect, uchar offset, uchar cmd)
490{
491
492 volatile cfiptr_t addr;
493 cfiword_t cword;
494 addr.cp = flash_make_addr(info, sect, offset);
495 flash_make_cmd(info, cmd, &cword);
496 switch(info->portwidth) {
497 case FLASH_CFI_8BIT:
498 *addr.cp = cword.c;
499 break;
500 case FLASH_CFI_16BIT:
501 *addr.wp = cword.w;
502 break;
503 case FLASH_CFI_32BIT:
504 *addr.lp = cword.l;
505 break;
506 }
507}
508
509/*-----------------------------------------------------------------------
510 */
511static int flash_isequal(flash_info_t * info, int sect, uchar offset, uchar cmd)
512{
513 cfiptr_t cptr;
514 cfiword_t cword;
515 int retval;
516 cptr.cp = flash_make_addr(info, sect, offset);
517 flash_make_cmd(info, cmd, &cword);
518 switch(info->portwidth) {
519 case FLASH_CFI_8BIT:
520 retval = (cptr.cp[0] == cword.c);
521 break;
522 case FLASH_CFI_16BIT:
523 retval = (cptr.wp[0] == cword.w);
524 break;
525 case FLASH_CFI_32BIT:
526 retval = (cptr.lp[0] == cword.l);
527 break;
528 default:
529 retval = 0;
530 break;
531 }
532 return retval;
533}
534/*-----------------------------------------------------------------------
535 */
536static int flash_isset(flash_info_t * info, int sect, uchar offset, uchar cmd)
537{
538 cfiptr_t cptr;
539 cfiword_t cword;
540 int retval;
541 cptr.cp = flash_make_addr(info, sect, offset);
542 flash_make_cmd(info, cmd, &cword);
543 switch(info->portwidth) {
544 case FLASH_CFI_8BIT:
545 retval = ((cptr.cp[0] & cword.c) == cword.c);
546 break;
547 case FLASH_CFI_16BIT:
548 retval = ((cptr.wp[0] & cword.w) == cword.w);
549 break;
550 case FLASH_CFI_32BIT:
551 retval = ((cptr.lp[0] & cword.l) == cword.l);
552 break;
553 default:
554 retval = 0;
555 break;
556 }
557 return retval;
558}
559
560/*-----------------------------------------------------------------------
561 * detect if flash is compatible with the Common Flash Interface (CFI)
562 * http://www.jedec.org/download/search/jesd68.pdf
563 *
564*/
565static int flash_detect_cfi(flash_info_t * info)
566{
567
568 for(info->portwidth=FLASH_CFI_8BIT; info->portwidth <= FLASH_CFI_32BIT;
569 info->portwidth <<= 1) {
570 for(info->chipwidth =FLASH_CFI_BY8;
571 info->chipwidth <= info->portwidth;
572 info->chipwidth <<= 1) {
573 flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
574 flash_write_cmd(info, 0, FLASH_OFFSET_CFI, FLASH_CMD_CFI);
575 if(flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP,'Q') &&
576 flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R') &&
577 flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y'))
578 return 1;
579 }
580 }
581 return 0;
582}
583/*
584 * The following code cannot be run from FLASH!
585 *
586 */
587static ulong flash_get_size (ulong base, int banknum)
588{
589 flash_info_t * info = &flash_info[banknum];
590 int i, j;
591 int sect_cnt;
592 unsigned long sector;
593 unsigned long tmp;
594 int size_ratio;
595 uchar num_erase_regions;
596 int erase_region_size;
597 int erase_region_count;
598
599 info->start[0] = base;
600
601 if(flash_detect_cfi(info)){
602#ifdef DEBUG_FLASH
603 printf("portwidth=%d chipwidth=%d\n", info->portwidth, info->chipwidth); /* test-only */
604#endif
605 size_ratio = info->portwidth / info->chipwidth;
606 num_erase_regions = flash_read_uchar(info, FLASH_OFFSET_NUM_ERASE_REGIONS);
607#ifdef DEBUG_FLASH
608 printf("found %d erase regions\n", num_erase_regions);
609#endif
610 sect_cnt = 0;
611 sector = base;
612 for(i = 0 ; i < num_erase_regions; i++) {
613 if(i > NUM_ERASE_REGIONS) {
614 printf("%d erase regions found, only %d used\n",
615 num_erase_regions, NUM_ERASE_REGIONS);
616 break;
617 }
618 tmp = flash_read_long(info, 0, FLASH_OFFSET_ERASE_REGIONS);
619 erase_region_size = (tmp & 0xffff)? ((tmp & 0xffff) * 256): 128;
620 tmp >>= 16;
621 erase_region_count = (tmp & 0xffff) +1;
622 for(j = 0; j< erase_region_count; j++) {
623 info->start[sect_cnt] = sector;
624 sector += (erase_region_size * size_ratio);
625 info->protect[sect_cnt] = flash_isset(info, sect_cnt, FLASH_OFFSET_PROTECT, FLASH_STATUS_PROTECT);
626 sect_cnt++;
627 }
628 }
629
630 info->sector_count = sect_cnt;
631 /* multiply the size by the number of chips */
632 info->size = (1 << flash_read_uchar(info, FLASH_OFFSET_SIZE)) * size_ratio;
633 info->buffer_size = (1 << flash_read_ushort(info, 0, FLASH_OFFSET_BUFFER_SIZE));
634 tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_ETOUT);
635 info->erase_blk_tout = (tmp * (1 << flash_read_uchar(info, FLASH_OFFSET_EMAX_TOUT)));
636 tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_WBTOUT);
637 info->buffer_write_tout = (tmp * (1 << flash_read_uchar(info, FLASH_OFFSET_WBMAX_TOUT)));
638 tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_WTOUT);
639 info->write_tout = (tmp * (1 << flash_read_uchar(info, FLASH_OFFSET_WMAX_TOUT)))/ 1000;
640 info->flash_id = FLASH_MAN_CFI;
641 }
642
643 flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
644 return(info->size);
645}
646
647
648/*-----------------------------------------------------------------------
649 */
650static int flash_write_cfiword (flash_info_t *info, ulong dest, cfiword_t cword)
651{
652
aee2fa27
SR		 653 cfiptr_t cptr;
654 int flag;
655
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SR		 656 cptr.cp = (uchar *)dest;
657
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SR		 658 /* Check if Flash is (sufficiently) erased */
659 switch(info->portwidth) {
660 case FLASH_CFI_8BIT:
661 flag = ((cptr.cp[0] & cword.c) == cword.c);
662 break;
663 case FLASH_CFI_16BIT:
664 flag = ((cptr.wp[0] & cword.w) == cword.w);
665 break;
666 case FLASH_CFI_32BIT:
667 flag = ((cptr.lp[0] & cword.l) == cword.l);
668 break;
669 default:
670 return 2;
671 }
672 if(!flag)
673 return 2;
674
675 /* Disable interrupts which might cause a timeout here */
676 flag = disable_interrupts();
677
678 flash_write_cmd(info, 0, 0, FLASH_CMD_CLEAR_STATUS);
679 flash_write_cmd(info, 0, 0, FLASH_CMD_WRITE);
680
681 switch(info->portwidth) {
682 case FLASH_CFI_8BIT:
683 cptr.cp[0] = cword.c;
684 break;
685 case FLASH_CFI_16BIT:
686 cptr.wp[0] = cword.w;
687 break;
688 case FLASH_CFI_32BIT:
689 cptr.lp[0] = cword.l;
690 break;
691 }
692
693 /* re-enable interrupts if necessary */
694 if(flag)
695 enable_interrupts();
696
697 return flash_full_status_check(info, 0, info->write_tout, "write");
698}
699
6d0f6bcf 700#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
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SR		 701
702/* loop through the sectors from the highest address
703 * when the passed address is greater or equal to the sector address
704 * we have a match
705 */
706static int find_sector(flash_info_t *info, ulong addr)
707{
708 int sector;
709 for(sector = info->sector_count - 1; sector >= 0; sector--) {
710 if(addr >= info->start[sector])
711 break;
712 }
713 return sector;
714}
715
716static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, int len)
717{
718
719 int sector;
720 int cnt;
721 int retcode;
722 volatile cfiptr_t src;
723 volatile cfiptr_t dst;
724
725 src.cp = cp;
726 dst.cp = (uchar *)dest;
727 sector = find_sector(info, dest);
728 flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS);
729 flash_write_cmd(info, sector, 0, FLASH_CMD_WRITE_TO_BUFFER);
730 if((retcode = flash_status_check(info, sector, info->buffer_write_tout,
731 "write to buffer")) == ERR_OK) {
732 switch(info->portwidth) {
733 case FLASH_CFI_8BIT:
734 cnt = len;
735 break;
736 case FLASH_CFI_16BIT:
737 cnt = len >> 1;
738 if (len & 0x1) { /* test-only: unaligned size */
739 puts("\nUnalgined size!!!\n"); /* test-only */
740 cnt++;
741 }
742 break;
743 case FLASH_CFI_32BIT:
744 cnt = len >> 2;
745 break;
746 default:
747 return ERR_INVAL;
748 break;
749 }
750 flash_write_cmd(info, sector, 0, (uchar)cnt-1);
751 while(cnt-- > 0) {
752 switch(info->portwidth) {
753 case FLASH_CFI_8BIT:
754 *dst.cp++ = *src.cp++;
755 break;
756 case FLASH_CFI_16BIT:
757 *dst.wp++ = *src.wp++;
758 break;
759 case FLASH_CFI_32BIT:
760 *dst.lp++ = *src.lp++;
761 break;
762 default:
763 return ERR_INVAL;
764 break;
765 }
766 }
767 flash_write_cmd(info, sector, 0, FLASH_CMD_WRITE_BUFFER_CONFIRM);
768 retcode = flash_full_status_check(info, sector, info->buffer_write_tout,
769 "buffer write");
770 }
771 flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS);
772 return retcode;
773}
6d0f6bcf 774#endif /* CONFIG_SYS_USE_FLASH_BUFFER_WRITE */
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