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fe8c2806 WD |
1 | /* |
2 | * (C) Copyright 2002 | |
3 | * Brad Kemp, Seranoa Networks, Brad.Kemp@seranoa.com | |
4 | * | |
3765b3e7 | 5 | * SPDX-License-Identifier: GPL-2.0+ |
fe8c2806 WD |
6 | */ |
7 | ||
8 | #include <common.h> | |
9 | #include <mpc8260.h> | |
10 | #include <asm/processor.h> | |
11 | ||
12 | #undef DEBUG_FLASH | |
13 | /* | |
14 | * This file implements a Common Flash Interface (CFI) driver for U-Boot. | |
15 | * The width of the port and the width of the chips are determined at initialization. | |
16 | * These widths are used to calculate the address for access CFI data structures. | |
17 | * It has been tested on an Intel Strataflash implementation. | |
18 | * | |
19 | * References | |
20 | * JEDEC Standard JESD68 - Common Flash Interface (CFI) | |
21 | * JEDEC Standard JEP137-A Common Flash Interface (CFI) ID Codes | |
22 | * Intel Application Note 646 Common Flash Interface (CFI) and Command Sets | |
23 | * Intel 290667-008 3 Volt Intel StrataFlash Memory datasheet | |
24 | * | |
25 | * TODO | |
26 | * Use Primary Extended Query table (PRI) and Alternate Algorithm Query Table (ALT) to determine if protection is available | |
27 | * Add support for other command sets Use the PRI and ALT to determine command set | |
28 | * Verify erase and program timeouts. | |
29 | */ | |
30 | ||
31 | #define FLASH_CMD_CFI 0x98 | |
32 | #define FLASH_CMD_READ_ID 0x90 | |
33 | #define FLASH_CMD_RESET 0xff | |
34 | #define FLASH_CMD_BLOCK_ERASE 0x20 | |
35 | #define FLASH_CMD_ERASE_CONFIRM 0xD0 | |
36 | #define FLASH_CMD_WRITE 0x40 | |
37 | #define FLASH_CMD_PROTECT 0x60 | |
38 | #define FLASH_CMD_PROTECT_SET 0x01 | |
39 | #define FLASH_CMD_PROTECT_CLEAR 0xD0 | |
40 | #define FLASH_CMD_CLEAR_STATUS 0x50 | |
41 | #define FLASH_CMD_WRITE_TO_BUFFER 0xE8 | |
42 | #define FLASH_CMD_WRITE_BUFFER_CONFIRM 0xD0 | |
43 | ||
44 | #define FLASH_STATUS_DONE 0x80 | |
45 | #define FLASH_STATUS_ESS 0x40 | |
46 | #define FLASH_STATUS_ECLBS 0x20 | |
47 | #define FLASH_STATUS_PSLBS 0x10 | |
48 | #define FLASH_STATUS_VPENS 0x08 | |
49 | #define FLASH_STATUS_PSS 0x04 | |
50 | #define FLASH_STATUS_DPS 0x02 | |
51 | #define FLASH_STATUS_R 0x01 | |
52 | #define FLASH_STATUS_PROTECT 0x01 | |
53 | ||
54 | #define FLASH_OFFSET_CFI 0x55 | |
55 | #define FLASH_OFFSET_CFI_RESP 0x10 | |
56 | #define FLASH_OFFSET_WTOUT 0x1F | |
57 | #define FLASH_OFFSET_WBTOUT 0x20 | |
58 | #define FLASH_OFFSET_ETOUT 0x21 | |
59 | #define FLASH_OFFSET_CETOUT 0x22 | |
60 | #define FLASH_OFFSET_WMAX_TOUT 0x23 | |
61 | #define FLASH_OFFSET_WBMAX_TOUT 0x24 | |
62 | #define FLASH_OFFSET_EMAX_TOUT 0x25 | |
63 | #define FLASH_OFFSET_CEMAX_TOUT 0x26 | |
64 | #define FLASH_OFFSET_SIZE 0x27 | |
65 | #define FLASH_OFFSET_INTERFACE 0x28 | |
66 | #define FLASH_OFFSET_BUFFER_SIZE 0x2A | |
67 | #define FLASH_OFFSET_NUM_ERASE_REGIONS 0x2C | |
68 | #define FLASH_OFFSET_ERASE_REGIONS 0x2D | |
69 | #define FLASH_OFFSET_PROTECT 0x02 | |
70 | #define FLASH_OFFSET_USER_PROTECTION 0x85 | |
71 | #define FLASH_OFFSET_INTEL_PROTECTION 0x81 | |
72 | ||
73 | ||
74 | #define FLASH_MAN_CFI 0x01000000 | |
75 | ||
76 | ||
fe8c2806 WD |
77 | typedef union { |
78 | unsigned char c; | |
79 | unsigned short w; | |
80 | unsigned long l; | |
81 | } cfiword_t; | |
82 | ||
83 | typedef union { | |
84 | unsigned char * cp; | |
85 | unsigned short *wp; | |
86 | unsigned long *lp; | |
87 | } cfiptr_t; | |
88 | ||
89 | #define NUM_ERASE_REGIONS 4 | |
90 | ||
6d0f6bcf | 91 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
fe8c2806 WD |
92 | |
93 | ||
94 | /*----------------------------------------------------------------------- | |
95 | * Functions | |
96 | */ | |
97 | ||
98 | ||
fe8c2806 WD |
99 | static void flash_add_byte(flash_info_t *info, cfiword_t * cword, uchar c); |
100 | static void flash_make_cmd(flash_info_t * info, uchar cmd, void * cmdbuf); | |
101 | static void flash_write_cmd(flash_info_t * info, int sect, uchar offset, uchar cmd); | |
102 | static int flash_isequal(flash_info_t * info, int sect, uchar offset, uchar cmd); | |
103 | static int flash_isset(flash_info_t * info, int sect, uchar offset, uchar cmd); | |
104 | static int flash_detect_cfi(flash_info_t * info); | |
105 | static ulong flash_get_size (ulong base, int banknum); | |
106 | static int flash_write_cfiword (flash_info_t *info, ulong dest, cfiword_t cword); | |
107 | static int flash_full_status_check(flash_info_t * info, ulong sector, ulong tout, char * prompt); | |
6d0f6bcf | 108 | #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE |
fe8c2806 WD |
109 | static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, int len); |
110 | #endif | |
111 | /*----------------------------------------------------------------------- | |
112 | * create an address based on the offset and the port width | |
113 | */ | |
114 | inline uchar * flash_make_addr(flash_info_t * info, int sect, int offset) | |
115 | { | |
116 | return ((uchar *)(info->start[sect] + (offset * info->portwidth))); | |
117 | } | |
118 | /*----------------------------------------------------------------------- | |
119 | * read a character at a port width address | |
120 | */ | |
121 | inline uchar flash_read_uchar(flash_info_t * info, uchar offset) | |
122 | { | |
123 | uchar *cp; | |
124 | cp = flash_make_addr(info, 0, offset); | |
125 | return (cp[info->portwidth - 1]); | |
126 | } | |
127 | ||
128 | /*----------------------------------------------------------------------- | |
129 | * read a short word by swapping for ppc format. | |
130 | */ | |
131 | ushort flash_read_ushort(flash_info_t * info, int sect, uchar offset) | |
132 | { | |
133 | uchar * addr; | |
134 | ||
135 | addr = flash_make_addr(info, sect, offset); | |
136 | return ((addr[(2*info->portwidth) - 1] << 8) | addr[info->portwidth - 1]); | |
137 | ||
138 | } | |
139 | ||
140 | /*----------------------------------------------------------------------- | |
141 | * read a long word by picking the least significant byte of each maiximum | |
142 | * port size word. Swap for ppc format. | |
143 | */ | |
144 | ulong flash_read_long(flash_info_t * info, int sect, uchar offset) | |
145 | { | |
146 | uchar * addr; | |
147 | ||
148 | addr = flash_make_addr(info, sect, offset); | |
149 | return ( (addr[(2*info->portwidth) - 1] << 24 ) | (addr[(info->portwidth) -1] << 16) | | |
150 | (addr[(4*info->portwidth) - 1] << 8) | addr[(3*info->portwidth) - 1]); | |
151 | ||
152 | } | |
153 | ||
154 | /*----------------------------------------------------------------------- | |
155 | */ | |
156 | unsigned long flash_init (void) | |
157 | { | |
158 | unsigned long size; | |
159 | int i; | |
160 | unsigned long address; | |
161 | ||
162 | ||
163 | /* The flash is positioned back to back, with the demultiplexing of the chip | |
164 | * based on the A24 address line. | |
165 | * | |
166 | */ | |
167 | ||
6d0f6bcf | 168 | address = CONFIG_SYS_FLASH_BASE; |
fe8c2806 WD |
169 | size = 0; |
170 | ||
171 | ||
172 | /* Init: no FLASHes known */ | |
6d0f6bcf | 173 | for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) { |
fe8c2806 WD |
174 | flash_info[i].flash_id = FLASH_UNKNOWN; |
175 | size += flash_info[i].size = flash_get_size(address, i); | |
6d0f6bcf | 176 | address += CONFIG_SYS_FLASH_INCREMENT; |
fe8c2806 WD |
177 | if (flash_info[0].flash_id == FLASH_UNKNOWN) { |
178 | printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",i, | |
179 | flash_info[0].size, flash_info[i].size<<20); | |
180 | } | |
181 | } | |
182 | ||
183 | /* Monitor protection ON by default */ | |
6d0f6bcf JCPV |
184 | #if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE) |
185 | for(i=0; flash_info[0].start[i] < CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1; i++) | |
fe8c2806 WD |
186 | (void)flash_real_protect(&flash_info[0], i, 1); |
187 | #endif | |
188 | ||
189 | return (size); | |
190 | } | |
191 | ||
192 | /*----------------------------------------------------------------------- | |
193 | */ | |
194 | int flash_erase (flash_info_t *info, int s_first, int s_last) | |
195 | { | |
196 | int rcode = 0; | |
197 | int prot; | |
198 | int sect; | |
199 | ||
200 | if( info->flash_id != FLASH_MAN_CFI) { | |
201 | printf ("Can't erase unknown flash type - aborted\n"); | |
202 | return 1; | |
203 | } | |
204 | if ((s_first < 0) || (s_first > s_last)) { | |
205 | printf ("- no sectors to erase\n"); | |
206 | return 1; | |
207 | } | |
208 | ||
209 | prot = 0; | |
210 | for (sect=s_first; sect<=s_last; ++sect) { | |
211 | if (info->protect[sect]) { | |
212 | prot++; | |
213 | } | |
214 | } | |
215 | if (prot) { | |
216 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
217 | prot); | |
218 | } else { | |
219 | printf ("\n"); | |
220 | } | |
221 | ||
222 | ||
223 | for (sect = s_first; sect<=s_last; sect++) { | |
224 | if (info->protect[sect] == 0) { /* not protected */ | |
225 | flash_write_cmd(info, sect, 0, FLASH_CMD_CLEAR_STATUS); | |
226 | flash_write_cmd(info, sect, 0, FLASH_CMD_BLOCK_ERASE); | |
227 | flash_write_cmd(info, sect, 0, FLASH_CMD_ERASE_CONFIRM); | |
228 | ||
229 | if(flash_full_status_check(info, sect, info->erase_blk_tout, "erase")) { | |
230 | rcode = 1; | |
231 | } else | |
232 | printf("."); | |
233 | } | |
234 | } | |
235 | printf (" done\n"); | |
236 | return rcode; | |
237 | } | |
238 | ||
239 | /*----------------------------------------------------------------------- | |
240 | */ | |
241 | void flash_print_info (flash_info_t *info) | |
242 | { | |
243 | int i; | |
244 | ||
245 | if (info->flash_id != FLASH_MAN_CFI) { | |
246 | printf ("missing or unknown FLASH type\n"); | |
247 | return; | |
248 | } | |
249 | ||
250 | printf("CFI conformant FLASH (%d x %d)", | |
251 | (info->portwidth << 3 ), (info->chipwidth << 3 )); | |
252 | printf (" Size: %ld MB in %d Sectors\n", | |
253 | info->size >> 20, info->sector_count); | |
254 | printf(" Erase timeout %ld ms, write timeout %ld ms, buffer write timeout %ld ms, buffer size %d\n", | |
255 | info->erase_blk_tout, info->write_tout, info->buffer_write_tout, info->buffer_size); | |
256 | ||
257 | printf (" Sector Start Addresses:"); | |
258 | for (i=0; i<info->sector_count; ++i) { | |
259 | if ((i % 5) == 0) | |
260 | printf ("\n"); | |
261 | printf (" %08lX%5s", | |
262 | info->start[i], | |
263 | info->protect[i] ? " (RO)" : " " | |
264 | ); | |
265 | } | |
266 | printf ("\n"); | |
267 | return; | |
268 | } | |
269 | ||
270 | /*----------------------------------------------------------------------- | |
271 | * Copy memory to flash, returns: | |
272 | * 0 - OK | |
273 | * 1 - write timeout | |
274 | * 2 - Flash not erased | |
275 | */ | |
276 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) | |
277 | { | |
278 | ulong wp; | |
279 | ulong cp; | |
280 | int aln; | |
281 | cfiword_t cword; | |
282 | int i, rc; | |
283 | ||
284 | /* get lower aligned address */ | |
285 | wp = (addr & ~(info->portwidth - 1)); | |
286 | ||
287 | /* handle unaligned start */ | |
288 | if((aln = addr - wp) != 0) { | |
289 | cword.l = 0; | |
290 | cp = wp; | |
291 | for(i=0;i<aln; ++i, ++cp) | |
292 | flash_add_byte(info, &cword, (*(uchar *)cp)); | |
293 | ||
294 | for(; (i< info->portwidth) && (cnt > 0) ; i++) { | |
295 | flash_add_byte(info, &cword, *src++); | |
296 | cnt--; | |
297 | cp++; | |
298 | } | |
299 | for(; (cnt == 0) && (i < info->portwidth); ++i, ++cp) | |
300 | flash_add_byte(info, &cword, (*(uchar *)cp)); | |
301 | if((rc = flash_write_cfiword(info, wp, cword)) != 0) | |
302 | return rc; | |
303 | wp = cp; | |
304 | } | |
305 | ||
6d0f6bcf | 306 | #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE |
fe8c2806 WD |
307 | while(cnt >= info->portwidth) { |
308 | i = info->buffer_size > cnt? cnt: info->buffer_size; | |
309 | if((rc = flash_write_cfibuffer(info, wp, src,i)) != ERR_OK) | |
310 | return rc; | |
311 | wp += i; | |
312 | src += i; | |
313 | cnt -=i; | |
314 | } | |
315 | #else | |
316 | /* handle the aligned part */ | |
317 | while(cnt >= info->portwidth) { | |
318 | cword.l = 0; | |
319 | for(i = 0; i < info->portwidth; i++) { | |
320 | flash_add_byte(info, &cword, *src++); | |
321 | } | |
322 | if((rc = flash_write_cfiword(info, wp, cword)) != 0) | |
323 | return rc; | |
324 | wp += info->portwidth; | |
325 | cnt -= info->portwidth; | |
326 | } | |
6d0f6bcf | 327 | #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */ |
fe8c2806 WD |
328 | if (cnt == 0) { |
329 | return (0); | |
330 | } | |
331 | ||
332 | /* | |
333 | * handle unaligned tail bytes | |
334 | */ | |
335 | cword.l = 0; | |
336 | for (i=0, cp=wp; (i<info->portwidth) && (cnt>0); ++i, ++cp) { | |
337 | flash_add_byte(info, &cword, *src++); | |
338 | --cnt; | |
339 | } | |
340 | for (; i<info->portwidth; ++i, ++cp) { | |
341 | flash_add_byte(info, & cword, (*(uchar *)cp)); | |
342 | } | |
343 | ||
344 | return flash_write_cfiword(info, wp, cword); | |
345 | } | |
346 | ||
347 | /*----------------------------------------------------------------------- | |
348 | */ | |
349 | int flash_real_protect(flash_info_t *info, long sector, int prot) | |
350 | { | |
351 | int retcode = 0; | |
352 | ||
353 | flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS); | |
354 | flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT); | |
355 | if(prot) | |
356 | flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT_SET); | |
357 | else | |
358 | flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT_CLEAR); | |
359 | ||
360 | if((retcode = flash_full_status_check(info, sector, info->erase_blk_tout, | |
361 | prot?"protect":"unprotect")) == 0) { | |
362 | ||
363 | info->protect[sector] = prot; | |
364 | /* Intel's unprotect unprotects all locking */ | |
365 | if(prot == 0) { | |
366 | int i; | |
367 | for(i = 0 ; i<info->sector_count; i++) { | |
368 | if(info->protect[i]) | |
369 | flash_real_protect(info, i, 1); | |
370 | } | |
371 | } | |
372 | } | |
373 | ||
374 | return retcode; | |
375 | } | |
376 | /*----------------------------------------------------------------------- | |
377 | * wait for XSR.7 to be set. Time out with an error if it does not. | |
378 | * This routine does not set the flash to read-array mode. | |
379 | */ | |
380 | static int flash_status_check(flash_info_t * info, ulong sector, ulong tout, char * prompt) | |
381 | { | |
382 | ulong start; | |
383 | ||
384 | /* Wait for command completion */ | |
385 | start = get_timer (0); | |
386 | while(!flash_isset(info, sector, 0, FLASH_STATUS_DONE)) { | |
387 | if (get_timer(start) > info->erase_blk_tout) { | |
388 | printf("Flash %s timeout at address %lx\n", prompt, info->start[sector]); | |
389 | flash_write_cmd(info, sector, 0, FLASH_CMD_RESET); | |
390 | return ERR_TIMOUT; | |
391 | } | |
392 | } | |
393 | return ERR_OK; | |
394 | } | |
395 | /*----------------------------------------------------------------------- | |
396 | * Wait for XSR.7 to be set, if it times out print an error, otherwise do a full status check. | |
397 | * This routine sets the flash to read-array mode. | |
398 | */ | |
399 | static int flash_full_status_check(flash_info_t * info, ulong sector, ulong tout, char * prompt) | |
400 | { | |
401 | int retcode; | |
402 | retcode = flash_status_check(info, sector, tout, prompt); | |
403 | if((retcode == ERR_OK) && !flash_isequal(info,sector, 0, FLASH_STATUS_DONE)) { | |
404 | retcode = ERR_INVAL; | |
405 | printf("Flash %s error at address %lx\n", prompt,info->start[sector]); | |
406 | if(flash_isset(info, sector, 0, FLASH_STATUS_ECLBS | FLASH_STATUS_PSLBS)){ | |
407 | printf("Command Sequence Error.\n"); | |
408 | } else if(flash_isset(info, sector, 0, FLASH_STATUS_ECLBS)){ | |
409 | printf("Block Erase Error.\n"); | |
410 | retcode = ERR_NOT_ERASED; | |
411 | } else if (flash_isset(info, sector, 0, FLASH_STATUS_PSLBS)) { | |
412 | printf("Locking Error\n"); | |
413 | } | |
414 | if(flash_isset(info, sector, 0, FLASH_STATUS_DPS)){ | |
415 | printf("Block locked.\n"); | |
416 | retcode = ERR_PROTECTED; | |
417 | } | |
418 | if(flash_isset(info, sector, 0, FLASH_STATUS_VPENS)) | |
419 | printf("Vpp Low Error.\n"); | |
420 | } | |
421 | flash_write_cmd(info, sector, 0, FLASH_CMD_RESET); | |
422 | return retcode; | |
423 | } | |
424 | /*----------------------------------------------------------------------- | |
425 | */ | |
426 | static void flash_add_byte(flash_info_t *info, cfiword_t * cword, uchar c) | |
427 | { | |
428 | switch(info->portwidth) { | |
429 | case FLASH_CFI_8BIT: | |
430 | cword->c = c; | |
431 | break; | |
432 | case FLASH_CFI_16BIT: | |
433 | cword->w = (cword->w << 8) | c; | |
434 | break; | |
435 | case FLASH_CFI_32BIT: | |
436 | cword->l = (cword->l << 8) | c; | |
437 | } | |
438 | } | |
439 | ||
440 | ||
441 | /*----------------------------------------------------------------------- | |
442 | * make a proper sized command based on the port and chip widths | |
443 | */ | |
444 | static void flash_make_cmd(flash_info_t * info, uchar cmd, void * cmdbuf) | |
445 | { | |
446 | int i; | |
447 | uchar *cp = (uchar *)cmdbuf; | |
448 | for(i=0; i< info->portwidth; i++) | |
449 | *cp++ = ((i+1) % info->chipwidth) ? '\0':cmd; | |
450 | } | |
451 | ||
452 | /* | |
453 | * Write a proper sized command to the correct address | |
454 | */ | |
455 | static void flash_write_cmd(flash_info_t * info, int sect, uchar offset, uchar cmd) | |
456 | { | |
457 | ||
458 | volatile cfiptr_t addr; | |
459 | cfiword_t cword; | |
460 | addr.cp = flash_make_addr(info, sect, offset); | |
461 | flash_make_cmd(info, cmd, &cword); | |
462 | switch(info->portwidth) { | |
463 | case FLASH_CFI_8BIT: | |
464 | *addr.cp = cword.c; | |
465 | break; | |
466 | case FLASH_CFI_16BIT: | |
467 | *addr.wp = cword.w; | |
468 | break; | |
469 | case FLASH_CFI_32BIT: | |
470 | *addr.lp = cword.l; | |
471 | break; | |
472 | } | |
473 | } | |
474 | ||
475 | /*----------------------------------------------------------------------- | |
476 | */ | |
477 | static int flash_isequal(flash_info_t * info, int sect, uchar offset, uchar cmd) | |
478 | { | |
479 | cfiptr_t cptr; | |
480 | cfiword_t cword; | |
481 | int retval; | |
482 | cptr.cp = flash_make_addr(info, sect, offset); | |
483 | flash_make_cmd(info, cmd, &cword); | |
484 | switch(info->portwidth) { | |
485 | case FLASH_CFI_8BIT: | |
486 | retval = (cptr.cp[0] == cword.c); | |
487 | break; | |
488 | case FLASH_CFI_16BIT: | |
489 | retval = (cptr.wp[0] == cword.w); | |
490 | break; | |
491 | case FLASH_CFI_32BIT: | |
492 | retval = (cptr.lp[0] == cword.l); | |
493 | break; | |
494 | default: | |
495 | retval = 0; | |
496 | break; | |
497 | } | |
498 | return retval; | |
499 | } | |
500 | /*----------------------------------------------------------------------- | |
501 | */ | |
502 | static int flash_isset(flash_info_t * info, int sect, uchar offset, uchar cmd) | |
503 | { | |
504 | cfiptr_t cptr; | |
505 | cfiword_t cword; | |
506 | int retval; | |
507 | cptr.cp = flash_make_addr(info, sect, offset); | |
508 | flash_make_cmd(info, cmd, &cword); | |
509 | switch(info->portwidth) { | |
510 | case FLASH_CFI_8BIT: | |
511 | retval = ((cptr.cp[0] & cword.c) == cword.c); | |
512 | break; | |
513 | case FLASH_CFI_16BIT: | |
514 | retval = ((cptr.wp[0] & cword.w) == cword.w); | |
515 | break; | |
516 | case FLASH_CFI_32BIT: | |
517 | retval = ((cptr.lp[0] & cword.l) == cword.l); | |
518 | break; | |
519 | default: | |
520 | retval = 0; | |
521 | break; | |
522 | } | |
523 | return retval; | |
524 | } | |
525 | ||
526 | /*----------------------------------------------------------------------- | |
527 | * detect if flash is compatible with the Common Flash Interface (CFI) | |
528 | * http://www.jedec.org/download/search/jesd68.pdf | |
529 | * | |
530 | */ | |
531 | static int flash_detect_cfi(flash_info_t * info) | |
532 | { | |
533 | ||
534 | for(info->portwidth=FLASH_CFI_8BIT; info->portwidth <= FLASH_CFI_32BIT; | |
535 | info->portwidth <<= 1) { | |
536 | for(info->chipwidth =FLASH_CFI_BY8; | |
537 | info->chipwidth <= info->portwidth; | |
538 | info->chipwidth <<= 1) { | |
539 | flash_write_cmd(info, 0, 0, FLASH_CMD_RESET); | |
540 | flash_write_cmd(info, 0, FLASH_OFFSET_CFI, FLASH_CMD_CFI); | |
541 | if(flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP,'Q') && | |
542 | flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R') && | |
543 | flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y')) | |
544 | return 1; | |
545 | } | |
546 | } | |
547 | return 0; | |
548 | } | |
549 | /* | |
550 | * The following code cannot be run from FLASH! | |
551 | * | |
552 | */ | |
553 | static ulong flash_get_size (ulong base, int banknum) | |
554 | { | |
555 | flash_info_t * info = &flash_info[banknum]; | |
556 | int i, j; | |
557 | int sect_cnt; | |
558 | unsigned long sector; | |
559 | unsigned long tmp; | |
560 | int size_ratio; | |
561 | uchar num_erase_regions; | |
562 | int erase_region_size; | |
563 | int erase_region_count; | |
564 | ||
565 | info->start[0] = base; | |
566 | ||
567 | if(flash_detect_cfi(info)){ | |
568 | size_ratio = info->portwidth / info->chipwidth; | |
569 | num_erase_regions = flash_read_uchar(info, FLASH_OFFSET_NUM_ERASE_REGIONS); | |
570 | #ifdef DEBUG_FLASH | |
571 | printf("found %d erase regions\n", num_erase_regions); | |
572 | #endif | |
573 | sect_cnt = 0; | |
574 | sector = base; | |
575 | for(i = 0 ; i < num_erase_regions; i++) { | |
576 | if(i > NUM_ERASE_REGIONS) { | |
577 | printf("%d erase regions found, only %d used\n", | |
578 | num_erase_regions, NUM_ERASE_REGIONS); | |
579 | break; | |
580 | } | |
581 | tmp = flash_read_long(info, 0, FLASH_OFFSET_ERASE_REGIONS); | |
582 | erase_region_size = (tmp & 0xffff)? ((tmp & 0xffff) * 256): 128; | |
583 | tmp >>= 16; | |
584 | erase_region_count = (tmp & 0xffff) +1; | |
585 | for(j = 0; j< erase_region_count; j++) { | |
586 | info->start[sect_cnt] = sector; | |
587 | sector += (erase_region_size * size_ratio); | |
588 | info->protect[sect_cnt] = flash_isset(info, sect_cnt, FLASH_OFFSET_PROTECT, FLASH_STATUS_PROTECT); | |
589 | sect_cnt++; | |
590 | } | |
591 | } | |
592 | ||
593 | info->sector_count = sect_cnt; | |
594 | /* multiply the size by the number of chips */ | |
595 | info->size = (1 << flash_read_uchar(info, FLASH_OFFSET_SIZE)) * size_ratio; | |
596 | info->buffer_size = (1 << flash_read_ushort(info, 0, FLASH_OFFSET_BUFFER_SIZE)); | |
597 | tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_ETOUT); | |
598 | info->erase_blk_tout = (tmp * (1 << flash_read_uchar(info, FLASH_OFFSET_EMAX_TOUT))); | |
599 | tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_WBTOUT); | |
600 | info->buffer_write_tout = (tmp * (1 << flash_read_uchar(info, FLASH_OFFSET_WBMAX_TOUT))); | |
601 | tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_WTOUT); | |
602 | info->write_tout = (tmp * (1 << flash_read_uchar(info, FLASH_OFFSET_WMAX_TOUT)))/ 1000; | |
603 | info->flash_id = FLASH_MAN_CFI; | |
604 | } | |
605 | ||
606 | flash_write_cmd(info, 0, 0, FLASH_CMD_RESET); | |
607 | return(info->size); | |
608 | } | |
609 | ||
610 | ||
611 | /*----------------------------------------------------------------------- | |
612 | */ | |
613 | static int flash_write_cfiword (flash_info_t *info, ulong dest, cfiword_t cword) | |
614 | { | |
615 | ||
616 | cfiptr_t ctladdr; | |
617 | cfiptr_t cptr; | |
618 | int flag; | |
619 | ||
620 | ctladdr.cp = flash_make_addr(info, 0, 0); | |
621 | cptr.cp = (uchar *)dest; | |
622 | ||
623 | ||
624 | /* Check if Flash is (sufficiently) erased */ | |
625 | switch(info->portwidth) { | |
626 | case FLASH_CFI_8BIT: | |
627 | flag = ((cptr.cp[0] & cword.c) == cword.c); | |
628 | break; | |
629 | case FLASH_CFI_16BIT: | |
630 | flag = ((cptr.wp[0] & cword.w) == cword.w); | |
631 | break; | |
632 | case FLASH_CFI_32BIT: | |
633 | flag = ((cptr.lp[0] & cword.l) == cword.l); | |
634 | break; | |
635 | default: | |
636 | return 2; | |
637 | } | |
638 | if(!flag) | |
639 | return 2; | |
640 | ||
641 | /* Disable interrupts which might cause a timeout here */ | |
642 | flag = disable_interrupts(); | |
643 | ||
644 | flash_write_cmd(info, 0, 0, FLASH_CMD_CLEAR_STATUS); | |
645 | flash_write_cmd(info, 0, 0, FLASH_CMD_WRITE); | |
646 | ||
647 | switch(info->portwidth) { | |
648 | case FLASH_CFI_8BIT: | |
649 | cptr.cp[0] = cword.c; | |
650 | break; | |
651 | case FLASH_CFI_16BIT: | |
652 | cptr.wp[0] = cword.w; | |
653 | break; | |
654 | case FLASH_CFI_32BIT: | |
655 | cptr.lp[0] = cword.l; | |
656 | break; | |
657 | } | |
658 | ||
659 | /* re-enable interrupts if necessary */ | |
660 | if(flag) | |
661 | enable_interrupts(); | |
662 | ||
663 | return flash_full_status_check(info, 0, info->write_tout, "write"); | |
664 | } | |
665 | ||
6d0f6bcf | 666 | #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE |
fe8c2806 WD |
667 | |
668 | /* loop through the sectors from the highest address | |
669 | * when the passed address is greater or equal to the sector address | |
670 | * we have a match | |
671 | */ | |
672 | static int find_sector(flash_info_t *info, ulong addr) | |
673 | { | |
674 | int sector; | |
675 | for(sector = info->sector_count - 1; sector >= 0; sector--) { | |
676 | if(addr >= info->start[sector]) | |
677 | break; | |
678 | } | |
679 | return sector; | |
680 | } | |
681 | ||
682 | static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, int len) | |
683 | { | |
684 | ||
685 | int sector; | |
686 | int cnt; | |
687 | int retcode; | |
688 | volatile cfiptr_t src; | |
689 | volatile cfiptr_t dst; | |
690 | ||
691 | src.cp = cp; | |
692 | dst.cp = (uchar *)dest; | |
693 | sector = find_sector(info, dest); | |
694 | flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS); | |
695 | flash_write_cmd(info, sector, 0, FLASH_CMD_WRITE_TO_BUFFER); | |
696 | if((retcode = flash_status_check(info, sector, info->buffer_write_tout, | |
697 | "write to buffer")) == ERR_OK) { | |
698 | switch(info->portwidth) { | |
699 | case FLASH_CFI_8BIT: | |
700 | cnt = len; | |
701 | break; | |
702 | case FLASH_CFI_16BIT: | |
703 | cnt = len >> 1; | |
704 | break; | |
705 | case FLASH_CFI_32BIT: | |
706 | cnt = len >> 2; | |
707 | break; | |
708 | default: | |
709 | return ERR_INVAL; | |
710 | break; | |
711 | } | |
712 | flash_write_cmd(info, sector, 0, (uchar)cnt-1); | |
713 | while(cnt-- > 0) { | |
714 | switch(info->portwidth) { | |
715 | case FLASH_CFI_8BIT: | |
716 | *dst.cp++ = *src.cp++; | |
717 | break; | |
718 | case FLASH_CFI_16BIT: | |
719 | *dst.wp++ = *src.wp++; | |
720 | break; | |
721 | case FLASH_CFI_32BIT: | |
722 | *dst.lp++ = *src.lp++; | |
723 | break; | |
724 | default: | |
725 | return ERR_INVAL; | |
726 | break; | |
727 | } | |
728 | } | |
729 | flash_write_cmd(info, sector, 0, FLASH_CMD_WRITE_BUFFER_CONFIRM); | |
730 | retcode = flash_full_status_check(info, sector, info->buffer_write_tout, | |
731 | "buffer write"); | |
732 | } | |
733 | flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS); | |
734 | return retcode; | |
735 | } | |
6d0f6bcf | 736 | #endif /* CONFIG_SYS_USE_FLASH_BUFFER_WRITE */ |