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5e4b3361 SR |
1 | /* |
2 | * (C) Copyright 2002 | |
3 | * Brad Kemp, Seranoa Networks, Brad.Kemp@seranoa.com | |
4 | * | |
5 | * See file CREDITS for list of people who contributed to this | |
6 | * project. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation; either version 2 of | |
11 | * the License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
21 | * MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | #include <common.h> | |
25 | #include <asm/processor.h> | |
26 | #include <asm/cache.h> | |
27 | ||
28 | #undef DEBUG_FLASH | |
29 | /* | |
30 | * This file implements a Common Flash Interface (CFI) driver for U-Boot. | |
31 | * The width of the port and the width of the chips are determined at initialization. | |
32 | * These widths are used to calculate the address for access CFI data structures. | |
33 | * It has been tested on an Intel Strataflash implementation. | |
34 | * | |
35 | * References | |
36 | * JEDEC Standard JESD68 - Common Flash Interface (CFI) | |
37 | * JEDEC Standard JEP137-A Common Flash Interface (CFI) ID Codes | |
38 | * Intel Application Note 646 Common Flash Interface (CFI) and Command Sets | |
39 | * Intel 290667-008 3 Volt Intel StrataFlash Memory datasheet | |
40 | * | |
41 | * TODO | |
42 | * Use Primary Extended Query table (PRI) and Alternate Algorithm Query Table (ALT) to determine if protection is available | |
43 | * Add support for other command sets Use the PRI and ALT to determine command set | |
44 | * Verify erase and program timeouts. | |
45 | */ | |
46 | ||
47 | #define FLASH_CMD_CFI 0x98 | |
48 | #define FLASH_CMD_READ_ID 0x90 | |
49 | #define FLASH_CMD_RESET 0xff | |
50 | #define FLASH_CMD_BLOCK_ERASE 0x20 | |
51 | #define FLASH_CMD_ERASE_CONFIRM 0xD0 | |
52 | #define FLASH_CMD_WRITE 0x40 | |
53 | #define FLASH_CMD_PROTECT 0x60 | |
54 | #define FLASH_CMD_PROTECT_SET 0x01 | |
55 | #define FLASH_CMD_PROTECT_CLEAR 0xD0 | |
56 | #define FLASH_CMD_CLEAR_STATUS 0x50 | |
57 | #define FLASH_CMD_WRITE_TO_BUFFER 0xE8 | |
58 | #define FLASH_CMD_WRITE_BUFFER_CONFIRM 0xD0 | |
59 | ||
60 | #define FLASH_STATUS_DONE 0x80 | |
61 | #define FLASH_STATUS_ESS 0x40 | |
62 | #define FLASH_STATUS_ECLBS 0x20 | |
63 | #define FLASH_STATUS_PSLBS 0x10 | |
64 | #define FLASH_STATUS_VPENS 0x08 | |
65 | #define FLASH_STATUS_PSS 0x04 | |
66 | #define FLASH_STATUS_DPS 0x02 | |
67 | #define FLASH_STATUS_R 0x01 | |
68 | #define FLASH_STATUS_PROTECT 0x01 | |
69 | ||
70 | #define FLASH_OFFSET_CFI 0x55 | |
71 | #define FLASH_OFFSET_CFI_RESP 0x10 | |
72 | #define FLASH_OFFSET_WTOUT 0x1F | |
73 | #define FLASH_OFFSET_WBTOUT 0x20 | |
74 | #define FLASH_OFFSET_ETOUT 0x21 | |
75 | #define FLASH_OFFSET_CETOUT 0x22 | |
76 | #define FLASH_OFFSET_WMAX_TOUT 0x23 | |
77 | #define FLASH_OFFSET_WBMAX_TOUT 0x24 | |
78 | #define FLASH_OFFSET_EMAX_TOUT 0x25 | |
79 | #define FLASH_OFFSET_CEMAX_TOUT 0x26 | |
80 | #define FLASH_OFFSET_SIZE 0x27 | |
81 | #define FLASH_OFFSET_INTERFACE 0x28 | |
82 | #define FLASH_OFFSET_BUFFER_SIZE 0x2A | |
83 | #define FLASH_OFFSET_NUM_ERASE_REGIONS 0x2C | |
84 | #define FLASH_OFFSET_ERASE_REGIONS 0x2D | |
85 | #define FLASH_OFFSET_PROTECT 0x02 | |
86 | #define FLASH_OFFSET_USER_PROTECTION 0x85 | |
87 | #define FLASH_OFFSET_INTEL_PROTECTION 0x81 | |
88 | ||
89 | #define FLASH_MAN_CFI 0x01000000 | |
90 | ||
91 | typedef union { | |
92 | unsigned char c; | |
93 | unsigned short w; | |
94 | unsigned long l; | |
95 | } cfiword_t; | |
96 | ||
97 | typedef union { | |
98 | unsigned char *cp; | |
99 | unsigned short *wp; | |
100 | unsigned long *lp; | |
101 | } cfiptr_t; | |
102 | ||
103 | #define NUM_ERASE_REGIONS 4 | |
104 | ||
6d0f6bcf | 105 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
5e4b3361 SR |
106 | |
107 | /*----------------------------------------------------------------------- | |
108 | * Functions | |
109 | */ | |
110 | ||
111 | static void flash_add_byte(flash_info_t * info, cfiword_t * cword, uchar c); | |
112 | static void flash_make_cmd(flash_info_t * info, uchar cmd, void *cmdbuf); | |
113 | static void flash_write_cmd(flash_info_t * info, int sect, uchar offset, | |
114 | uchar cmd); | |
115 | static int flash_isequal(flash_info_t * info, int sect, uchar offset, | |
116 | uchar cmd); | |
117 | static int flash_isset(flash_info_t * info, int sect, uchar offset, uchar cmd); | |
118 | static int flash_detect_cfi(flash_info_t * info); | |
119 | static ulong flash_get_size(ulong base, int banknum); | |
120 | static int flash_write_cfiword(flash_info_t * info, ulong dest, | |
121 | cfiword_t cword); | |
122 | static int flash_full_status_check(flash_info_t * info, ulong sector, | |
123 | ulong tout, char *prompt); | |
6d0f6bcf | 124 | #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE |
5e4b3361 SR |
125 | static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, |
126 | int len); | |
127 | #endif | |
128 | /*----------------------------------------------------------------------- | |
129 | * create an address based on the offset and the port width | |
130 | */ | |
131 | inline uchar *flash_make_addr(flash_info_t * info, int sect, int offset) | |
132 | { | |
133 | return ((uchar *) (info->start[sect] + (offset * info->portwidth))); | |
134 | } | |
135 | ||
136 | /*----------------------------------------------------------------------- | |
137 | * read a character at a port width address | |
138 | */ | |
139 | inline uchar flash_read_uchar(flash_info_t * info, uchar offset) | |
140 | { | |
141 | uchar *cp; | |
142 | cp = flash_make_addr(info, 0, offset); | |
143 | return (cp[info->portwidth - 1]); | |
144 | } | |
145 | ||
146 | /*----------------------------------------------------------------------- | |
147 | * read a short word by swapping for ppc format. | |
148 | */ | |
149 | ushort flash_read_ushort(flash_info_t * info, int sect, uchar offset) | |
150 | { | |
151 | uchar *addr; | |
152 | ||
153 | addr = flash_make_addr(info, sect, offset); | |
154 | return ((addr[(2 * info->portwidth) - 1] << 8) | | |
155 | addr[info->portwidth - 1]); | |
156 | ||
157 | } | |
158 | ||
159 | /*----------------------------------------------------------------------- | |
160 | * read a long word by picking the least significant byte of each maiximum | |
161 | * port size word. Swap for ppc format. | |
162 | */ | |
163 | ulong flash_read_long(flash_info_t * info, int sect, uchar offset) | |
164 | { | |
165 | uchar *addr; | |
166 | ||
167 | addr = flash_make_addr(info, sect, offset); | |
168 | return ((addr[(2 * info->portwidth) - 1] << 24) | | |
169 | (addr[(info->portwidth) - 1] << 16) | | |
170 | (addr[(4 * info->portwidth) - 1] << 8) | | |
171 | addr[(3 * info->portwidth) - 1]); | |
172 | ||
173 | } | |
174 | ||
175 | /*----------------------------------------------------------------------- | |
176 | */ | |
177 | unsigned long flash_init(void) | |
178 | { | |
179 | unsigned long size; | |
180 | int i; | |
181 | unsigned long address; | |
182 | ||
183 | /* The flash is positioned back to back, with the demultiplexing of the chip | |
184 | * based on the A24 address line. | |
185 | * | |
186 | */ | |
187 | ||
6d0f6bcf | 188 | address = CONFIG_SYS_FLASH_BASE; |
5e4b3361 SR |
189 | size = 0; |
190 | ||
191 | /* Init: no FLASHes known */ | |
6d0f6bcf | 192 | for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) { |
5e4b3361 SR |
193 | flash_info[i].flash_id = FLASH_UNKNOWN; |
194 | size += flash_info[i].size = flash_get_size(address, i); | |
6d0f6bcf | 195 | address += CONFIG_SYS_FLASH_INCREMENT; |
5e4b3361 SR |
196 | if (flash_info[i].flash_id == FLASH_UNKNOWN) { |
197 | printf | |
198 | ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", | |
199 | i, flash_info[0].size, flash_info[i].size << 20); | |
200 | } | |
201 | } | |
202 | ||
203 | #if 0 /* test-only */ | |
204 | /* Monitor protection ON by default */ | |
6d0f6bcf | 205 | #if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE) |
5e4b3361 | 206 | for (i = 0; |
6d0f6bcf | 207 | flash_info[0].start[i] < CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1; |
5e4b3361 SR |
208 | i++) |
209 | (void)flash_real_protect(&flash_info[0], i, 1); | |
210 | #endif | |
211 | #endif | |
212 | ||
213 | return (size); | |
214 | } | |
215 | ||
216 | /*----------------------------------------------------------------------- | |
217 | */ | |
218 | int flash_erase(flash_info_t * info, int s_first, int s_last) | |
219 | { | |
220 | int rcode = 0; | |
221 | int prot; | |
222 | int sect; | |
223 | ||
224 | if (info->flash_id != FLASH_MAN_CFI) { | |
225 | printf("Can't erase unknown flash type - aborted\n"); | |
226 | return 1; | |
227 | } | |
228 | if ((s_first < 0) || (s_first > s_last)) { | |
229 | printf("- no sectors to erase\n"); | |
230 | return 1; | |
231 | } | |
232 | ||
233 | prot = 0; | |
234 | for (sect = s_first; sect <= s_last; ++sect) { | |
235 | if (info->protect[sect]) { | |
236 | prot++; | |
237 | } | |
238 | } | |
239 | if (prot) { | |
240 | printf("- Warning: %d protected sectors will not be erased!\n", | |
241 | prot); | |
242 | } else { | |
243 | printf("\n"); | |
244 | } | |
245 | ||
246 | for (sect = s_first; sect <= s_last; sect++) { | |
247 | if (info->protect[sect] == 0) { /* not protected */ | |
248 | flash_write_cmd(info, sect, 0, FLASH_CMD_CLEAR_STATUS); | |
249 | flash_write_cmd(info, sect, 0, FLASH_CMD_BLOCK_ERASE); | |
250 | flash_write_cmd(info, sect, 0, FLASH_CMD_ERASE_CONFIRM); | |
251 | ||
252 | if (flash_full_status_check | |
253 | (info, sect, info->erase_blk_tout, "erase")) { | |
254 | rcode = 1; | |
255 | } else | |
256 | printf("."); | |
257 | } | |
258 | } | |
259 | printf(" done\n"); | |
260 | return rcode; | |
261 | } | |
262 | ||
263 | /*----------------------------------------------------------------------- | |
264 | */ | |
265 | void flash_print_info(flash_info_t * info) | |
266 | { | |
267 | int i; | |
268 | ||
269 | if (info->flash_id != FLASH_MAN_CFI) { | |
270 | printf("missing or unknown FLASH type\n"); | |
271 | return; | |
272 | } | |
273 | ||
274 | printf("CFI conformant FLASH (%d x %d)", | |
275 | (info->portwidth << 3), (info->chipwidth << 3)); | |
276 | printf(" Size: %ld MB in %d Sectors\n", | |
277 | info->size >> 20, info->sector_count); | |
278 | printf | |
279 | (" Erase timeout %ld ms, write timeout %ld ms, buffer write timeout %ld ms, buffer size %d\n", | |
280 | info->erase_blk_tout, info->write_tout, info->buffer_write_tout, | |
281 | info->buffer_size); | |
282 | ||
283 | printf(" Sector Start Addresses:"); | |
284 | for (i = 0; i < info->sector_count; ++i) { | |
285 | if ((i % 5) == 0) | |
286 | printf("\n"); | |
287 | printf(" %08lX%5s", | |
288 | info->start[i], info->protect[i] ? " (RO)" : " "); | |
289 | } | |
290 | printf("\n"); | |
291 | return; | |
292 | } | |
293 | ||
294 | /*----------------------------------------------------------------------- | |
295 | * Copy memory to flash, returns: | |
296 | * 0 - OK | |
297 | * 1 - write timeout | |
298 | * 2 - Flash not erased | |
299 | */ | |
300 | int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt) | |
301 | { | |
302 | ulong wp; | |
303 | ulong cp; | |
304 | int aln; | |
305 | cfiword_t cword; | |
306 | int i, rc; | |
307 | ||
308 | /* get lower aligned address */ | |
309 | wp = (addr & ~(info->portwidth - 1)); | |
310 | ||
311 | /* handle unaligned start */ | |
312 | if ((aln = addr - wp) != 0) { | |
313 | cword.l = 0; | |
314 | cp = wp; | |
315 | for (i = 0; i < aln; ++i, ++cp) | |
316 | flash_add_byte(info, &cword, (*(uchar *) cp)); | |
317 | ||
318 | for (; (i < info->portwidth) && (cnt > 0); i++) { | |
319 | flash_add_byte(info, &cword, *src++); | |
320 | cnt--; | |
321 | cp++; | |
322 | } | |
323 | for (; (cnt == 0) && (i < info->portwidth); ++i, ++cp) | |
324 | flash_add_byte(info, &cword, (*(uchar *) cp)); | |
325 | if ((rc = flash_write_cfiword(info, wp, cword)) != 0) | |
326 | return rc; | |
327 | wp = cp; | |
328 | } | |
6d0f6bcf | 329 | #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE |
5e4b3361 SR |
330 | while (cnt >= info->portwidth) { |
331 | i = info->buffer_size > cnt ? cnt : info->buffer_size; | |
332 | if ((rc = flash_write_cfibuffer(info, wp, src, i)) != ERR_OK) | |
333 | return rc; | |
334 | wp += i; | |
335 | src += i; | |
336 | cnt -= i; | |
337 | } | |
338 | #else | |
339 | /* handle the aligned part */ | |
340 | while (cnt >= info->portwidth) { | |
341 | cword.l = 0; | |
342 | for (i = 0; i < info->portwidth; i++) { | |
343 | flash_add_byte(info, &cword, *src++); | |
344 | } | |
345 | if ((rc = flash_write_cfiword(info, wp, cword)) != 0) | |
346 | return rc; | |
347 | wp += info->portwidth; | |
348 | cnt -= info->portwidth; | |
349 | } | |
6d0f6bcf | 350 | #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */ |
5e4b3361 SR |
351 | if (cnt == 0) { |
352 | return (0); | |
353 | } | |
354 | ||
355 | /* | |
356 | * handle unaligned tail bytes | |
357 | */ | |
358 | cword.l = 0; | |
359 | for (i = 0, cp = wp; (i < info->portwidth) && (cnt > 0); ++i, ++cp) { | |
360 | flash_add_byte(info, &cword, *src++); | |
361 | --cnt; | |
362 | } | |
363 | for (; i < info->portwidth; ++i, ++cp) { | |
364 | flash_add_byte(info, &cword, (*(uchar *) cp)); | |
365 | } | |
366 | ||
367 | return flash_write_cfiword(info, wp, cword); | |
368 | } | |
369 | ||
370 | /*----------------------------------------------------------------------- | |
371 | */ | |
372 | int flash_real_protect(flash_info_t * info, long sector, int prot) | |
373 | { | |
374 | int retcode = 0; | |
375 | ||
376 | flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS); | |
377 | flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT); | |
378 | if (prot) | |
379 | flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT_SET); | |
380 | else | |
381 | flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT_CLEAR); | |
382 | ||
383 | if ((retcode = | |
384 | flash_full_status_check(info, sector, info->erase_blk_tout, | |
385 | prot ? "protect" : "unprotect")) == 0) { | |
386 | ||
387 | info->protect[sector] = prot; | |
388 | /* Intel's unprotect unprotects all locking */ | |
389 | if (prot == 0) { | |
390 | int i; | |
391 | for (i = 0; i < info->sector_count; i++) { | |
392 | if (info->protect[i]) | |
393 | flash_real_protect(info, i, 1); | |
394 | } | |
395 | } | |
396 | } | |
397 | ||
398 | return retcode; | |
399 | } | |
400 | ||
401 | /*----------------------------------------------------------------------- | |
402 | * wait for XSR.7 to be set. Time out with an error if it does not. | |
403 | * This routine does not set the flash to read-array mode. | |
404 | */ | |
405 | static int flash_status_check(flash_info_t * info, ulong sector, ulong tout, | |
406 | char *prompt) | |
407 | { | |
408 | ulong start; | |
409 | ||
410 | /* Wait for command completion */ | |
411 | start = get_timer(0); | |
412 | while (!flash_isset(info, sector, 0, FLASH_STATUS_DONE)) { | |
413 | if (get_timer(start) > info->erase_blk_tout) { | |
414 | printf("Flash %s timeout at address %lx\n", prompt, | |
415 | info->start[sector]); | |
416 | flash_write_cmd(info, sector, 0, FLASH_CMD_RESET); | |
417 | return ERR_TIMOUT; | |
418 | } | |
419 | } | |
420 | return ERR_OK; | |
421 | } | |
422 | ||
423 | /*----------------------------------------------------------------------- | |
424 | * Wait for XSR.7 to be set, if it times out print an error, otherwise do a full status check. | |
425 | * This routine sets the flash to read-array mode. | |
426 | */ | |
427 | static int flash_full_status_check(flash_info_t * info, ulong sector, | |
428 | ulong tout, char *prompt) | |
429 | { | |
430 | int retcode; | |
431 | retcode = flash_status_check(info, sector, tout, prompt); | |
432 | if ((retcode == ERR_OK) | |
433 | && !flash_isequal(info, sector, 0, FLASH_STATUS_DONE)) { | |
434 | retcode = ERR_INVAL; | |
435 | printf("Flash %s error at address %lx\n", prompt, | |
436 | info->start[sector]); | |
437 | if (flash_isset | |
438 | (info, sector, 0, | |
439 | FLASH_STATUS_ECLBS | FLASH_STATUS_PSLBS)) { | |
440 | printf("Command Sequence Error.\n"); | |
441 | } else if (flash_isset(info, sector, 0, FLASH_STATUS_ECLBS)) { | |
442 | printf("Block Erase Error.\n"); | |
443 | retcode = ERR_NOT_ERASED; | |
444 | } else if (flash_isset(info, sector, 0, FLASH_STATUS_PSLBS)) { | |
445 | printf("Locking Error\n"); | |
446 | } | |
447 | if (flash_isset(info, sector, 0, FLASH_STATUS_DPS)) { | |
448 | printf("Block locked.\n"); | |
449 | retcode = ERR_PROTECTED; | |
450 | } | |
451 | if (flash_isset(info, sector, 0, FLASH_STATUS_VPENS)) | |
452 | printf("Vpp Low Error.\n"); | |
453 | } | |
454 | flash_write_cmd(info, sector, 0, FLASH_CMD_RESET); | |
455 | return retcode; | |
456 | } | |
457 | ||
458 | /*----------------------------------------------------------------------- | |
459 | */ | |
460 | static 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 | * make a proper sized command based on the port and chip widths | |
476 | */ | |
477 | static void flash_make_cmd(flash_info_t * info, uchar cmd, void *cmdbuf) | |
478 | { | |
479 | int i; | |
480 | uchar *cp = (uchar *) cmdbuf; | |
481 | for (i = 0; i < info->portwidth; i++) | |
482 | *cp++ = ((i + 1) % info->chipwidth) ? '\0' : cmd; | |
483 | } | |
484 | ||
485 | /* | |
486 | * Write a proper sized command to the correct address | |
487 | */ | |
488 | static void flash_write_cmd(flash_info_t * info, int sect, uchar offset, | |
489 | 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 | */ | |
511 | static 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 | /*----------------------------------------------------------------------- | |
536 | */ | |
537 | static int flash_isset(flash_info_t * info, int sect, uchar offset, uchar cmd) | |
538 | { | |
539 | cfiptr_t cptr; | |
540 | cfiword_t cword; | |
541 | int retval; | |
542 | cptr.cp = flash_make_addr(info, sect, offset); | |
543 | flash_make_cmd(info, cmd, &cword); | |
544 | switch (info->portwidth) { | |
545 | case FLASH_CFI_8BIT: | |
546 | retval = ((cptr.cp[0] & cword.c) == cword.c); | |
547 | break; | |
548 | case FLASH_CFI_16BIT: | |
549 | retval = ((cptr.wp[0] & cword.w) == cword.w); | |
550 | break; | |
551 | case FLASH_CFI_32BIT: | |
552 | retval = ((cptr.lp[0] & cword.l) == cword.l); | |
553 | break; | |
554 | default: | |
555 | retval = 0; | |
556 | break; | |
557 | } | |
558 | return retval; | |
559 | } | |
560 | ||
561 | /*----------------------------------------------------------------------- | |
562 | * detect if flash is compatible with the Common Flash Interface (CFI) | |
563 | * http://www.jedec.org/download/search/jesd68.pdf | |
564 | * | |
565 | */ | |
566 | static int flash_detect_cfi(flash_info_t * info) | |
567 | { | |
568 | ||
569 | for (info->portwidth = FLASH_CFI_8BIT; | |
570 | info->portwidth <= FLASH_CFI_32BIT; info->portwidth <<= 1) { | |
571 | for (info->chipwidth = FLASH_CFI_BY8; | |
572 | info->chipwidth <= info->portwidth; | |
573 | info->chipwidth <<= 1) { | |
574 | flash_write_cmd(info, 0, 0, FLASH_CMD_RESET); | |
575 | flash_write_cmd(info, 0, FLASH_OFFSET_CFI, | |
576 | FLASH_CMD_CFI); | |
577 | if (flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP, 'Q') | |
578 | && flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP + 1, | |
579 | 'R') | |
580 | && flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP + 2, | |
581 | 'Y')) | |
582 | return 1; | |
583 | } | |
584 | } | |
585 | return 0; | |
586 | } | |
587 | ||
588 | /* | |
589 | * The following code cannot be run from FLASH! | |
590 | * | |
591 | */ | |
592 | static ulong flash_get_size(ulong base, int banknum) | |
593 | { | |
594 | flash_info_t *info = &flash_info[banknum]; | |
595 | int i, j; | |
596 | int sect_cnt; | |
597 | unsigned long sector; | |
598 | unsigned long tmp; | |
599 | int size_ratio = 0; | |
600 | uchar num_erase_regions; | |
601 | int erase_region_size; | |
602 | int erase_region_count; | |
603 | ||
604 | info->start[0] = base; | |
605 | #if 0 | |
606 | invalidate_dcache_range(base, base + 0x400); | |
607 | #endif | |
608 | if (flash_detect_cfi(info)) { | |
609 | ||
610 | size_ratio = info->portwidth / info->chipwidth; | |
611 | num_erase_regions = | |
612 | flash_read_uchar(info, FLASH_OFFSET_NUM_ERASE_REGIONS); | |
613 | ||
614 | sect_cnt = 0; | |
615 | sector = base; | |
616 | for (i = 0; i < num_erase_regions; i++) { | |
617 | if (i > NUM_ERASE_REGIONS) { | |
618 | printf("%d erase regions found, only %d used\n", | |
619 | num_erase_regions, NUM_ERASE_REGIONS); | |
620 | break; | |
621 | } | |
622 | tmp = | |
623 | flash_read_long(info, 0, | |
624 | FLASH_OFFSET_ERASE_REGIONS); | |
625 | erase_region_size = | |
626 | (tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128; | |
627 | tmp >>= 16; | |
628 | erase_region_count = (tmp & 0xffff) + 1; | |
629 | for (j = 0; j < erase_region_count; j++) { | |
630 | info->start[sect_cnt] = sector; | |
631 | sector += (erase_region_size * size_ratio); | |
632 | info->protect[sect_cnt] = | |
633 | flash_isset(info, sect_cnt, | |
634 | FLASH_OFFSET_PROTECT, | |
635 | FLASH_STATUS_PROTECT); | |
636 | sect_cnt++; | |
637 | } | |
638 | } | |
639 | ||
640 | info->sector_count = sect_cnt; | |
641 | /* multiply the size by the number of chips */ | |
642 | info->size = | |
643 | (1 << flash_read_uchar(info, FLASH_OFFSET_SIZE)) * | |
644 | size_ratio; | |
645 | info->buffer_size = | |
646 | (1 << flash_read_ushort(info, 0, FLASH_OFFSET_BUFFER_SIZE)); | |
647 | tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_ETOUT); | |
648 | info->erase_blk_tout = | |
649 | (tmp * | |
650 | (1 << flash_read_uchar(info, FLASH_OFFSET_EMAX_TOUT))); | |
651 | tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_WBTOUT); | |
652 | info->buffer_write_tout = | |
653 | (tmp * | |
654 | (1 << flash_read_uchar(info, FLASH_OFFSET_WBMAX_TOUT))); | |
655 | tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_WTOUT); | |
656 | info->write_tout = | |
657 | (tmp * | |
658 | (1 << flash_read_uchar(info, FLASH_OFFSET_WMAX_TOUT))) / | |
659 | 1000; | |
660 | info->flash_id = FLASH_MAN_CFI; | |
661 | } | |
662 | ||
663 | flash_write_cmd(info, 0, 0, FLASH_CMD_RESET); | |
664 | #ifdef DEBUG_FLASH | |
665 | printf("portwidth=%d chipwidth=%d\n", info->portwidth, info->chipwidth); /* test-only */ | |
666 | #endif | |
667 | #ifdef DEBUG_FLASH | |
668 | printf("found %d erase regions\n", num_erase_regions); | |
669 | #endif | |
670 | #ifdef DEBUG_FLASH | |
671 | printf("size=%08x sectors=%08x \n", info->size, info->sector_count); | |
672 | #endif | |
673 | return (info->size); | |
674 | } | |
675 | ||
676 | /*----------------------------------------------------------------------- | |
677 | */ | |
678 | static int flash_write_cfiword(flash_info_t * info, ulong dest, cfiword_t cword) | |
679 | { | |
680 | ||
681 | cfiptr_t ctladdr; | |
682 | cfiptr_t cptr; | |
683 | int flag; | |
684 | ||
685 | ctladdr.cp = flash_make_addr(info, 0, 0); | |
686 | cptr.cp = (uchar *) dest; | |
687 | ||
688 | /* Check if Flash is (sufficiently) erased */ | |
689 | switch (info->portwidth) { | |
690 | case FLASH_CFI_8BIT: | |
691 | flag = ((cptr.cp[0] & cword.c) == cword.c); | |
692 | break; | |
693 | case FLASH_CFI_16BIT: | |
694 | flag = ((cptr.wp[0] & cword.w) == cword.w); | |
695 | break; | |
696 | case FLASH_CFI_32BIT: | |
697 | flag = ((cptr.lp[0] & cword.l) == cword.l); | |
698 | break; | |
699 | default: | |
700 | return 2; | |
701 | } | |
702 | if (!flag) | |
703 | return 2; | |
704 | ||
705 | /* Disable interrupts which might cause a timeout here */ | |
706 | flag = disable_interrupts(); | |
707 | ||
708 | flash_write_cmd(info, 0, 0, FLASH_CMD_CLEAR_STATUS); | |
709 | flash_write_cmd(info, 0, 0, FLASH_CMD_WRITE); | |
710 | ||
711 | switch (info->portwidth) { | |
712 | case FLASH_CFI_8BIT: | |
713 | cptr.cp[0] = cword.c; | |
714 | break; | |
715 | case FLASH_CFI_16BIT: | |
716 | cptr.wp[0] = cword.w; | |
717 | break; | |
718 | case FLASH_CFI_32BIT: | |
719 | cptr.lp[0] = cword.l; | |
720 | break; | |
721 | } | |
722 | ||
723 | /* re-enable interrupts if necessary */ | |
724 | if (flag) | |
725 | enable_interrupts(); | |
726 | ||
727 | return flash_full_status_check(info, 0, info->write_tout, "write"); | |
728 | } | |
729 | ||
6d0f6bcf | 730 | #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE |
5e4b3361 SR |
731 | |
732 | /* loop through the sectors from the highest address | |
733 | * when the passed address is greater or equal to the sector address | |
734 | * we have a match | |
735 | */ | |
736 | static int find_sector(flash_info_t * info, ulong addr) | |
737 | { | |
738 | int sector; | |
739 | for (sector = info->sector_count - 1; sector >= 0; sector--) { | |
740 | if (addr >= info->start[sector]) | |
741 | break; | |
742 | } | |
743 | return sector; | |
744 | } | |
745 | ||
746 | static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, | |
747 | int len) | |
748 | { | |
749 | ||
750 | int sector; | |
751 | int cnt; | |
752 | int retcode; | |
753 | volatile cfiptr_t src; | |
754 | volatile cfiptr_t dst; | |
755 | ||
756 | src.cp = cp; | |
757 | dst.cp = (uchar *) dest; | |
758 | sector = find_sector(info, dest); | |
759 | flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS); | |
760 | flash_write_cmd(info, sector, 0, FLASH_CMD_WRITE_TO_BUFFER); | |
761 | if ((retcode = flash_status_check(info, sector, info->buffer_write_tout, | |
762 | "write to buffer")) == ERR_OK) { | |
763 | switch (info->portwidth) { | |
764 | case FLASH_CFI_8BIT: | |
765 | cnt = len; | |
766 | break; | |
767 | case FLASH_CFI_16BIT: | |
768 | cnt = len >> 1; | |
769 | break; | |
770 | case FLASH_CFI_32BIT: | |
771 | cnt = len >> 2; | |
772 | break; | |
773 | default: | |
774 | return ERR_INVAL; | |
775 | break; | |
776 | } | |
777 | flash_write_cmd(info, sector, 0, (uchar) cnt - 1); | |
778 | while (cnt-- > 0) { | |
779 | switch (info->portwidth) { | |
780 | case FLASH_CFI_8BIT: | |
781 | *dst.cp++ = *src.cp++; | |
782 | break; | |
783 | case FLASH_CFI_16BIT: | |
784 | *dst.wp++ = *src.wp++; | |
785 | break; | |
786 | case FLASH_CFI_32BIT: | |
787 | *dst.lp++ = *src.lp++; | |
788 | break; | |
789 | default: | |
790 | return ERR_INVAL; | |
791 | break; | |
792 | } | |
793 | } | |
794 | flash_write_cmd(info, sector, 0, | |
795 | FLASH_CMD_WRITE_BUFFER_CONFIRM); | |
796 | retcode = | |
797 | flash_full_status_check(info, sector, | |
798 | info->buffer_write_tout, | |
799 | "buffer write"); | |
800 | } | |
801 | flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS); | |
802 | return retcode; | |
803 | } | |
6d0f6bcf | 804 | #endif /* CONFIG_SYS_USE_FLASH_BUFFER_WRITE */ |