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652a10c0 WD |
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 | ||
27 | #undef DEBUG_FLASH | |
28 | /* | |
29 | * This file implements a Common Flash Interface (CFI) driver for ppcboot. | |
30 | * The width of the port and the width of the chips are determined at initialization. | |
31 | * These widths are used to calculate the address for access CFI data structures. | |
32 | * It has been tested on an Intel Strataflash implementation. | |
33 | * | |
34 | * References | |
35 | * JEDEC Standard JESD68 - Common Flash Interface (CFI) | |
36 | * JEDEC Standard JEP137-A Common Flash Interface (CFI) ID Codes | |
37 | * Intel Application Note 646 Common Flash Interface (CFI) and Command Sets | |
38 | * Intel 290667-008 3 Volt Intel StrataFlash Memory datasheet | |
39 | * | |
40 | * TODO | |
41 | * Use Primary Extended Query table (PRI) and Alternate Algorithm Query Table (ALT) to determine if protection is available | |
42 | * Add support for other command sets Use the PRI and ALT to determine command set | |
43 | * Verify erase and program timeouts. | |
44 | */ | |
45 | ||
46 | #define FLASH_CMD_CFI 0x98 | |
47 | #define FLASH_CMD_READ_ID 0x90 | |
48 | #define FLASH_CMD_RESET 0xff | |
49 | #define FLASH_CMD_BLOCK_ERASE 0x20 | |
50 | #define FLASH_CMD_ERASE_CONFIRM 0xD0 | |
51 | #define FLASH_CMD_WRITE 0x40 | |
52 | #define FLASH_CMD_PROTECT 0x60 | |
53 | #define FLASH_CMD_PROTECT_SET 0x01 | |
54 | #define FLASH_CMD_PROTECT_CLEAR 0xD0 | |
55 | #define FLASH_CMD_CLEAR_STATUS 0x50 | |
56 | #define FLASH_CMD_WRITE_TO_BUFFER 0xE8 | |
57 | #define FLASH_CMD_WRITE_BUFFER_CONFIRM 0xD0 | |
58 | ||
59 | #define FLASH_STATUS_DONE 0x80 | |
60 | #define FLASH_STATUS_ESS 0x40 | |
61 | #define FLASH_STATUS_ECLBS 0x20 | |
62 | #define FLASH_STATUS_PSLBS 0x10 | |
63 | #define FLASH_STATUS_VPENS 0x08 | |
64 | #define FLASH_STATUS_PSS 0x04 | |
65 | #define FLASH_STATUS_DPS 0x02 | |
66 | #define FLASH_STATUS_R 0x01 | |
67 | #define FLASH_STATUS_PROTECT 0x01 | |
68 | ||
69 | #define FLASH_OFFSET_CFI 0x55 | |
70 | #define FLASH_OFFSET_CFI_RESP 0x10 | |
71 | #define FLASH_OFFSET_WTOUT 0x1F | |
72 | #define FLASH_OFFSET_WBTOUT 0x20 | |
73 | #define FLASH_OFFSET_ETOUT 0x21 | |
74 | #define FLASH_OFFSET_CETOUT 0x22 | |
75 | #define FLASH_OFFSET_WMAX_TOUT 0x23 | |
76 | #define FLASH_OFFSET_WBMAX_TOUT 0x24 | |
77 | #define FLASH_OFFSET_EMAX_TOUT 0x25 | |
78 | #define FLASH_OFFSET_CEMAX_TOUT 0x26 | |
79 | #define FLASH_OFFSET_SIZE 0x27 | |
80 | #define FLASH_OFFSET_INTERFACE 0x28 | |
81 | #define FLASH_OFFSET_BUFFER_SIZE 0x2A | |
82 | #define FLASH_OFFSET_NUM_ERASE_REGIONS 0x2C | |
83 | #define FLASH_OFFSET_ERASE_REGIONS 0x2D | |
84 | #define FLASH_OFFSET_PROTECT 0x02 | |
85 | #define FLASH_OFFSET_USER_PROTECTION 0x85 | |
86 | #define FLASH_OFFSET_INTEL_PROTECTION 0x81 | |
87 | ||
88 | ||
89 | #define FLASH_MAN_CFI 0x01000000 | |
90 | ||
91 | ||
92 | typedef union { | |
93 | unsigned char c; | |
94 | unsigned short w; | |
95 | unsigned long l; | |
96 | } cfiword_t; | |
97 | ||
98 | typedef union { | |
99 | unsigned char * cp; | |
100 | unsigned short *wp; | |
101 | unsigned long *lp; | |
102 | } cfiptr_t; | |
103 | ||
104 | #define NUM_ERASE_REGIONS 4 | |
105 | ||
6d0f6bcf | 106 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
652a10c0 WD |
107 | |
108 | ||
109 | /*----------------------------------------------------------------------- | |
110 | * Functions | |
111 | */ | |
112 | ||
113 | ||
114 | static void flash_add_byte(flash_info_t *info, cfiword_t * cword, uchar c); | |
115 | static void flash_make_cmd(flash_info_t * info, uchar cmd, void * cmdbuf); | |
116 | static void flash_write_cmd(flash_info_t * info, int sect, uchar offset, uchar cmd); | |
117 | static int flash_isequal(flash_info_t * info, int sect, uchar offset, uchar cmd); | |
118 | static int flash_isset(flash_info_t * info, int sect, uchar offset, uchar cmd); | |
119 | static int flash_detect_cfi(flash_info_t * info); | |
120 | static ulong flash_get_size (ulong base, int banknum); | |
121 | static int flash_write_cfiword (flash_info_t *info, ulong dest, cfiword_t cword); | |
122 | static int flash_full_status_check(flash_info_t * info, ulong sector, ulong tout, char * prompt); | |
6d0f6bcf | 123 | #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE |
652a10c0 WD |
124 | static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, int len); |
125 | #endif | |
126 | /*----------------------------------------------------------------------- | |
127 | * create an address based on the offset and the port width | |
128 | */ | |
129 | inline uchar * flash_make_addr(flash_info_t * info, int sect, int offset) | |
130 | { | |
131 | return ((uchar *)(info->start[sect] + (offset * info->portwidth))); | |
132 | } | |
133 | /*----------------------------------------------------------------------- | |
134 | * read a character at a port width address | |
135 | */ | |
136 | inline uchar flash_read_uchar(flash_info_t * info, uchar offset) | |
137 | { | |
138 | uchar *cp; | |
139 | cp = flash_make_addr(info, 0, offset); | |
140 | return (cp[info->portwidth - 1]); | |
141 | } | |
142 | ||
143 | /*----------------------------------------------------------------------- | |
144 | * read a short word by swapping for ppc format. | |
145 | */ | |
146 | ushort flash_read_ushort(flash_info_t * info, int sect, uchar offset) | |
147 | { | |
148 | uchar * addr; | |
149 | ||
150 | addr = flash_make_addr(info, sect, offset); | |
151 | return ((addr[(2*info->portwidth) - 1] << 8) | addr[info->portwidth - 1]); | |
152 | ||
153 | } | |
154 | ||
155 | /*----------------------------------------------------------------------- | |
156 | * read a long word by picking the least significant byte of each maiximum | |
157 | * port size word. Swap for ppc format. | |
158 | */ | |
159 | ulong flash_read_long(flash_info_t * info, int sect, uchar offset) | |
160 | { | |
161 | uchar * addr; | |
162 | ||
163 | addr = flash_make_addr(info, sect, offset); | |
164 | return ( (addr[(2*info->portwidth) - 1] << 24 ) | (addr[(info->portwidth) -1] << 16) | | |
165 | (addr[(4*info->portwidth) - 1] << 8) | addr[(3*info->portwidth) - 1]); | |
166 | ||
167 | } | |
168 | ||
169 | /*----------------------------------------------------------------------- | |
170 | */ | |
171 | unsigned long flash_init (void) | |
172 | { | |
173 | unsigned long size; | |
174 | int i; | |
175 | unsigned long address; | |
176 | ||
177 | ||
178 | /* The flash is positioned back to back, with the demultiplexing of the chip | |
179 | * based on the A24 address line. | |
180 | * | |
181 | */ | |
182 | ||
6d0f6bcf | 183 | address = CONFIG_SYS_FLASH_BASE; |
652a10c0 WD |
184 | size = 0; |
185 | ||
186 | /* Init: no FLASHes known */ | |
6d0f6bcf | 187 | for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) { |
652a10c0 WD |
188 | flash_info[i].flash_id = FLASH_UNKNOWN; |
189 | size += flash_info[i].size = flash_get_size(address, i); | |
6d0f6bcf | 190 | address += CONFIG_SYS_FLASH_INCREMENT; |
652a10c0 WD |
191 | if (flash_info[0].flash_id == FLASH_UNKNOWN) { |
192 | printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",i, | |
193 | flash_info[0].size, flash_info[i].size<<20); | |
194 | } | |
195 | } | |
196 | ||
197 | #if 0 /* test-only */ | |
198 | /* Monitor protection ON by default */ | |
6d0f6bcf JCPV |
199 | #if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE) |
200 | for(i=0; flash_info[0].start[i] < CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_MONITOR_LEN-1; i++) | |
652a10c0 WD |
201 | (void)flash_real_protect(&flash_info[0], i, 1); |
202 | #endif | |
203 | #else | |
204 | /* monitor protection ON by default */ | |
205 | flash_protect (FLAG_PROTECT_SET, | |
6d0f6bcf | 206 | - CONFIG_SYS_MONITOR_LEN, |
652a10c0 WD |
207 | - 1, &flash_info[1]); |
208 | #endif | |
209 | ||
210 | return (size); | |
211 | } | |
212 | ||
213 | /*----------------------------------------------------------------------- | |
214 | */ | |
215 | int flash_erase (flash_info_t *info, int s_first, int s_last) | |
216 | { | |
217 | int rcode = 0; | |
218 | int prot; | |
219 | int sect; | |
220 | ||
221 | if( info->flash_id != FLASH_MAN_CFI) { | |
222 | printf ("Can't erase unknown flash type - aborted\n"); | |
223 | return 1; | |
224 | } | |
225 | if ((s_first < 0) || (s_first > s_last)) { | |
226 | printf ("- no sectors to erase\n"); | |
227 | return 1; | |
228 | } | |
229 | ||
230 | prot = 0; | |
231 | for (sect=s_first; sect<=s_last; ++sect) { | |
232 | if (info->protect[sect]) { | |
233 | prot++; | |
234 | } | |
235 | } | |
236 | if (prot) { | |
237 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
238 | prot); | |
239 | } else { | |
240 | printf ("\n"); | |
241 | } | |
242 | ||
243 | ||
244 | for (sect = s_first; sect<=s_last; sect++) { | |
245 | if (info->protect[sect] == 0) { /* not protected */ | |
246 | flash_write_cmd(info, sect, 0, FLASH_CMD_CLEAR_STATUS); | |
247 | flash_write_cmd(info, sect, 0, FLASH_CMD_BLOCK_ERASE); | |
248 | flash_write_cmd(info, sect, 0, FLASH_CMD_ERASE_CONFIRM); | |
249 | ||
250 | if(flash_full_status_check(info, sect, info->erase_blk_tout, "erase")) { | |
251 | rcode = 1; | |
252 | } else | |
253 | printf("."); | |
254 | } | |
255 | } | |
256 | printf (" done\n"); | |
257 | return rcode; | |
258 | } | |
259 | ||
260 | /*----------------------------------------------------------------------- | |
261 | */ | |
262 | void flash_print_info (flash_info_t *info) | |
263 | { | |
264 | int i; | |
265 | ||
266 | if (info->flash_id != FLASH_MAN_CFI) { | |
267 | printf ("missing or unknown FLASH type\n"); | |
268 | return; | |
269 | } | |
270 | ||
271 | printf("CFI conformant FLASH (%d x %d)", | |
272 | (info->portwidth << 3 ), (info->chipwidth << 3 )); | |
273 | printf (" Size: %ld MB in %d Sectors\n", | |
274 | info->size >> 20, info->sector_count); | |
275 | printf(" Erase timeout %ld ms, write timeout %ld ms, buffer write timeout %ld ms, buffer size %d\n", | |
276 | info->erase_blk_tout, info->write_tout, info->buffer_write_tout, info->buffer_size); | |
277 | ||
278 | printf (" Sector Start Addresses:"); | |
279 | for (i=0; i<info->sector_count; ++i) { | |
6d0f6bcf | 280 | #ifdef CONFIG_SYS_FLASH_EMPTY_INFO |
652a10c0 WD |
281 | int k; |
282 | int size; | |
283 | int erased; | |
284 | volatile unsigned long *flash; | |
285 | ||
286 | /* | |
287 | * Check if whole sector is erased | |
288 | */ | |
289 | if (i != (info->sector_count-1)) | |
290 | size = info->start[i+1] - info->start[i]; | |
291 | else | |
292 | size = info->start[0] + info->size - info->start[i]; | |
293 | erased = 1; | |
294 | flash = (volatile unsigned long *)info->start[i]; | |
295 | size = size >> 2; /* divide by 4 for longword access */ | |
296 | for (k=0; k<size; k++) | |
297 | { | |
298 | if (*flash++ != 0xffffffff) | |
299 | { | |
300 | erased = 0; | |
301 | break; | |
302 | } | |
303 | } | |
304 | ||
305 | if ((i % 5) == 0) | |
306 | printf ("\n "); | |
307 | /* print empty and read-only info */ | |
308 | printf (" %08lX%s%s", | |
309 | info->start[i], | |
310 | erased ? " E" : " ", | |
311 | info->protect[i] ? "RO " : " "); | |
312 | #else | |
313 | if ((i % 5) == 0) | |
314 | printf ("\n "); | |
315 | printf (" %08lX%s", | |
316 | info->start[i], | |
317 | info->protect[i] ? " (RO)" : " "); | |
318 | #endif | |
319 | } | |
320 | printf ("\n"); | |
321 | return; | |
322 | } | |
323 | ||
324 | /*----------------------------------------------------------------------- | |
325 | * Copy memory to flash, returns: | |
326 | * 0 - OK | |
327 | * 1 - write timeout | |
328 | * 2 - Flash not erased | |
329 | */ | |
330 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) | |
331 | { | |
332 | ulong wp; | |
333 | ulong cp; | |
334 | int aln; | |
335 | cfiword_t cword; | |
336 | int i, rc; | |
337 | ||
338 | /* get lower aligned address */ | |
339 | wp = (addr & ~(info->portwidth - 1)); | |
340 | ||
341 | /* handle unaligned start */ | |
342 | if((aln = addr - wp) != 0) { | |
343 | cword.l = 0; | |
344 | cp = wp; | |
345 | for(i=0;i<aln; ++i, ++cp) | |
346 | flash_add_byte(info, &cword, (*(uchar *)cp)); | |
347 | ||
348 | for(; (i< info->portwidth) && (cnt > 0) ; i++) { | |
349 | flash_add_byte(info, &cword, *src++); | |
350 | cnt--; | |
351 | cp++; | |
352 | } | |
353 | for(; (cnt == 0) && (i < info->portwidth); ++i, ++cp) | |
354 | flash_add_byte(info, &cword, (*(uchar *)cp)); | |
355 | if((rc = flash_write_cfiword(info, wp, cword)) != 0) | |
356 | return rc; | |
357 | wp = cp; | |
358 | } | |
359 | ||
6d0f6bcf | 360 | #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE |
652a10c0 WD |
361 | while(cnt >= info->portwidth) { |
362 | i = info->buffer_size > cnt? cnt: info->buffer_size; | |
363 | if((rc = flash_write_cfibuffer(info, wp, src,i)) != ERR_OK) | |
364 | return rc; | |
365 | wp += i; | |
366 | src += i; | |
367 | cnt -=i; | |
368 | } | |
369 | #else | |
370 | /* handle the aligned part */ | |
371 | while(cnt >= info->portwidth) { | |
372 | cword.l = 0; | |
373 | for(i = 0; i < info->portwidth; i++) { | |
374 | flash_add_byte(info, &cword, *src++); | |
375 | } | |
376 | if((rc = flash_write_cfiword(info, wp, cword)) != 0) | |
377 | return rc; | |
378 | wp += info->portwidth; | |
379 | cnt -= info->portwidth; | |
380 | } | |
6d0f6bcf | 381 | #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */ |
652a10c0 WD |
382 | if (cnt == 0) { |
383 | return (0); | |
384 | } | |
385 | ||
386 | /* | |
387 | * handle unaligned tail bytes | |
388 | */ | |
389 | cword.l = 0; | |
390 | for (i=0, cp=wp; (i<info->portwidth) && (cnt>0); ++i, ++cp) { | |
391 | flash_add_byte(info, &cword, *src++); | |
392 | --cnt; | |
393 | } | |
394 | for (; i<info->portwidth; ++i, ++cp) { | |
395 | flash_add_byte(info, & cword, (*(uchar *)cp)); | |
396 | } | |
397 | ||
398 | return flash_write_cfiword(info, wp, cword); | |
399 | } | |
400 | ||
401 | /*----------------------------------------------------------------------- | |
402 | */ | |
403 | int flash_real_protect(flash_info_t *info, long sector, int prot) | |
404 | { | |
405 | int retcode = 0; | |
406 | ||
407 | flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS); | |
408 | flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT); | |
409 | if(prot) | |
410 | flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT_SET); | |
411 | else | |
412 | flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT_CLEAR); | |
413 | ||
414 | if((retcode = flash_full_status_check(info, sector, info->erase_blk_tout, | |
415 | prot?"protect":"unprotect")) == 0) { | |
416 | ||
417 | info->protect[sector] = prot; | |
418 | /* Intel's unprotect unprotects all locking */ | |
419 | if(prot == 0) { | |
420 | int i; | |
421 | for(i = 0 ; i<info->sector_count; i++) { | |
422 | if(info->protect[i]) | |
423 | flash_real_protect(info, i, 1); | |
424 | } | |
425 | } | |
426 | } | |
427 | ||
428 | return retcode; | |
429 | } | |
430 | /*----------------------------------------------------------------------- | |
431 | * wait for XSR.7 to be set. Time out with an error if it does not. | |
432 | * This routine does not set the flash to read-array mode. | |
433 | */ | |
434 | static int flash_status_check(flash_info_t * info, ulong sector, ulong tout, char * prompt) | |
435 | { | |
436 | ulong start; | |
437 | ||
438 | /* Wait for command completion */ | |
439 | start = get_timer (0); | |
440 | while(!flash_isset(info, sector, 0, FLASH_STATUS_DONE)) { | |
441 | if (get_timer(start) > info->erase_blk_tout) { | |
442 | printf("Flash %s timeout at address %lx\n", prompt, info->start[sector]); | |
443 | flash_write_cmd(info, sector, 0, FLASH_CMD_RESET); | |
444 | return ERR_TIMOUT; | |
445 | } | |
446 | } | |
447 | return ERR_OK; | |
448 | } | |
449 | /*----------------------------------------------------------------------- | |
450 | * Wait for XSR.7 to be set, if it times out print an error, otherwise do a full status check. | |
451 | * This routine sets the flash to read-array mode. | |
452 | */ | |
453 | static int flash_full_status_check(flash_info_t * info, ulong sector, ulong tout, char * prompt) | |
454 | { | |
455 | int retcode; | |
456 | retcode = flash_status_check(info, sector, tout, prompt); | |
457 | if((retcode == ERR_OK) && !flash_isequal(info,sector, 0, FLASH_STATUS_DONE)) { | |
458 | retcode = ERR_INVAL; | |
459 | printf("Flash %s error at address %lx\n", prompt,info->start[sector]); | |
460 | if(flash_isset(info, sector, 0, FLASH_STATUS_ECLBS | FLASH_STATUS_PSLBS)){ | |
461 | printf("Command Sequence Error.\n"); | |
462 | } else if(flash_isset(info, sector, 0, FLASH_STATUS_ECLBS)){ | |
463 | printf("Block Erase Error.\n"); | |
464 | retcode = ERR_NOT_ERASED; | |
465 | } else if (flash_isset(info, sector, 0, FLASH_STATUS_PSLBS)) { | |
466 | printf("Locking Error\n"); | |
467 | } | |
468 | if(flash_isset(info, sector, 0, FLASH_STATUS_DPS)){ | |
469 | printf("Block locked.\n"); | |
470 | retcode = ERR_PROTECTED; | |
471 | } | |
472 | if(flash_isset(info, sector, 0, FLASH_STATUS_VPENS)) | |
473 | printf("Vpp Low Error.\n"); | |
474 | } | |
475 | flash_write_cmd(info, sector, 0, FLASH_CMD_RESET); | |
476 | return retcode; | |
477 | } | |
478 | /*----------------------------------------------------------------------- | |
479 | */ | |
480 | static void flash_add_byte(flash_info_t *info, cfiword_t * cword, uchar c) | |
481 | { | |
482 | switch(info->portwidth) { | |
483 | case FLASH_CFI_8BIT: | |
484 | cword->c = c; | |
485 | break; | |
486 | case FLASH_CFI_16BIT: | |
487 | cword->w = (cword->w << 8) | c; | |
488 | break; | |
489 | case FLASH_CFI_32BIT: | |
490 | cword->l = (cword->l << 8) | c; | |
491 | } | |
492 | } | |
493 | ||
494 | ||
495 | /*----------------------------------------------------------------------- | |
496 | * make a proper sized command based on the port and chip widths | |
497 | */ | |
498 | static void flash_make_cmd(flash_info_t * info, uchar cmd, void * cmdbuf) | |
499 | { | |
500 | int i; | |
501 | uchar *cp = (uchar *)cmdbuf; | |
502 | for(i=0; i< info->portwidth; i++) | |
503 | *cp++ = ((i+1) % info->chipwidth) ? '\0':cmd; | |
504 | } | |
505 | ||
506 | /* | |
507 | * Write a proper sized command to the correct address | |
508 | */ | |
509 | static void flash_write_cmd(flash_info_t * info, int sect, uchar offset, uchar cmd) | |
510 | { | |
511 | ||
512 | volatile cfiptr_t addr; | |
513 | cfiword_t cword; | |
514 | addr.cp = flash_make_addr(info, sect, offset); | |
515 | flash_make_cmd(info, cmd, &cword); | |
516 | switch(info->portwidth) { | |
517 | case FLASH_CFI_8BIT: | |
518 | *addr.cp = cword.c; | |
519 | break; | |
520 | case FLASH_CFI_16BIT: | |
521 | *addr.wp = cword.w; | |
522 | break; | |
523 | case FLASH_CFI_32BIT: | |
524 | *addr.lp = cword.l; | |
525 | break; | |
526 | } | |
527 | } | |
528 | ||
529 | /*----------------------------------------------------------------------- | |
530 | */ | |
531 | static int flash_isequal(flash_info_t * info, int sect, uchar offset, uchar cmd) | |
532 | { | |
533 | cfiptr_t cptr; | |
534 | cfiword_t cword; | |
535 | int retval; | |
536 | cptr.cp = flash_make_addr(info, sect, offset); | |
537 | flash_make_cmd(info, cmd, &cword); | |
538 | switch(info->portwidth) { | |
539 | case FLASH_CFI_8BIT: | |
540 | retval = (cptr.cp[0] == cword.c); | |
541 | break; | |
542 | case FLASH_CFI_16BIT: | |
543 | retval = (cptr.wp[0] == cword.w); | |
544 | break; | |
545 | case FLASH_CFI_32BIT: | |
546 | retval = (cptr.lp[0] == cword.l); | |
547 | break; | |
548 | default: | |
549 | retval = 0; | |
550 | break; | |
551 | } | |
552 | return retval; | |
553 | } | |
554 | /*----------------------------------------------------------------------- | |
555 | */ | |
556 | static int flash_isset(flash_info_t * info, int sect, uchar offset, uchar cmd) | |
557 | { | |
558 | cfiptr_t cptr; | |
559 | cfiword_t cword; | |
560 | int retval; | |
561 | cptr.cp = flash_make_addr(info, sect, offset); | |
562 | flash_make_cmd(info, cmd, &cword); | |
563 | switch(info->portwidth) { | |
564 | case FLASH_CFI_8BIT: | |
565 | retval = ((cptr.cp[0] & cword.c) == cword.c); | |
566 | break; | |
567 | case FLASH_CFI_16BIT: | |
568 | retval = ((cptr.wp[0] & cword.w) == cword.w); | |
569 | break; | |
570 | case FLASH_CFI_32BIT: | |
571 | retval = ((cptr.lp[0] & cword.l) == cword.l); | |
572 | break; | |
573 | default: | |
574 | retval = 0; | |
575 | break; | |
576 | } | |
577 | return retval; | |
578 | } | |
579 | ||
580 | /*----------------------------------------------------------------------- | |
581 | * detect if flash is compatible with the Common Flash Interface (CFI) | |
582 | * http://www.jedec.org/download/search/jesd68.pdf | |
583 | * | |
584 | */ | |
585 | static int flash_detect_cfi(flash_info_t * info) | |
586 | { | |
587 | ||
588 | for(info->portwidth=FLASH_CFI_8BIT; info->portwidth <= FLASH_CFI_32BIT; | |
589 | info->portwidth <<= 1) { | |
590 | for(info->chipwidth =FLASH_CFI_BY8; | |
591 | info->chipwidth <= info->portwidth; | |
592 | info->chipwidth <<= 1) { | |
593 | flash_write_cmd(info, 0, 0, FLASH_CMD_RESET); | |
594 | flash_write_cmd(info, 0, FLASH_OFFSET_CFI, FLASH_CMD_CFI); | |
595 | if(flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP,'Q') && | |
596 | flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R') && | |
597 | flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y')) | |
598 | return 1; | |
599 | } | |
600 | } | |
601 | return 0; | |
602 | } | |
603 | /* | |
604 | * The following code cannot be run from FLASH! | |
605 | * | |
606 | */ | |
607 | static ulong flash_get_size (ulong base, int banknum) | |
608 | { | |
609 | flash_info_t * info = &flash_info[banknum]; | |
610 | int i, j; | |
611 | int sect_cnt; | |
612 | unsigned long sector; | |
613 | unsigned long tmp; | |
614 | int size_ratio; | |
615 | uchar num_erase_regions; | |
616 | int erase_region_size; | |
617 | int erase_region_count; | |
618 | ||
619 | info->start[0] = base; | |
620 | ||
621 | if(flash_detect_cfi(info)){ | |
622 | #ifdef DEBUG_FLASH | |
623 | printf("portwidth=%d chipwidth=%d\n", info->portwidth, info->chipwidth); /* test-only */ | |
624 | #endif | |
625 | size_ratio = info->portwidth / info->chipwidth; | |
626 | num_erase_regions = flash_read_uchar(info, FLASH_OFFSET_NUM_ERASE_REGIONS); | |
627 | #ifdef DEBUG_FLASH | |
628 | printf("found %d erase regions\n", num_erase_regions); | |
629 | #endif | |
630 | sect_cnt = 0; | |
631 | sector = base; | |
632 | for(i = 0 ; i < num_erase_regions; i++) { | |
633 | if(i > NUM_ERASE_REGIONS) { | |
634 | printf("%d erase regions found, only %d used\n", | |
635 | num_erase_regions, NUM_ERASE_REGIONS); | |
636 | break; | |
637 | } | |
638 | tmp = flash_read_long(info, 0, FLASH_OFFSET_ERASE_REGIONS); | |
639 | erase_region_size = (tmp & 0xffff)? ((tmp & 0xffff) * 256): 128; | |
640 | tmp >>= 16; | |
641 | erase_region_count = (tmp & 0xffff) +1; | |
642 | for(j = 0; j< erase_region_count; j++) { | |
643 | info->start[sect_cnt] = sector; | |
644 | sector += (erase_region_size * size_ratio); | |
645 | info->protect[sect_cnt] = flash_isset(info, sect_cnt, FLASH_OFFSET_PROTECT, FLASH_STATUS_PROTECT); | |
646 | sect_cnt++; | |
647 | } | |
648 | } | |
649 | ||
650 | info->sector_count = sect_cnt; | |
651 | /* multiply the size by the number of chips */ | |
652 | info->size = (1 << flash_read_uchar(info, FLASH_OFFSET_SIZE)) * size_ratio; | |
653 | info->buffer_size = (1 << flash_read_ushort(info, 0, FLASH_OFFSET_BUFFER_SIZE)); | |
654 | tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_ETOUT); | |
655 | info->erase_blk_tout = (tmp * (1 << flash_read_uchar(info, FLASH_OFFSET_EMAX_TOUT))); | |
656 | tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_WBTOUT); | |
657 | info->buffer_write_tout = (tmp * (1 << flash_read_uchar(info, FLASH_OFFSET_WBMAX_TOUT))); | |
658 | tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_WTOUT); | |
659 | info->write_tout = (tmp * (1 << flash_read_uchar(info, FLASH_OFFSET_WMAX_TOUT)))/ 1000; | |
660 | info->flash_id = FLASH_MAN_CFI; | |
661 | } | |
662 | ||
663 | flash_write_cmd(info, 0, 0, FLASH_CMD_RESET); | |
664 | return(info->size); | |
665 | } | |
666 | ||
667 | ||
668 | /*----------------------------------------------------------------------- | |
669 | */ | |
670 | static int flash_write_cfiword (flash_info_t *info, ulong dest, cfiword_t cword) | |
671 | { | |
672 | ||
673 | cfiptr_t ctladdr; | |
674 | cfiptr_t cptr; | |
675 | int flag; | |
676 | ||
677 | ctladdr.cp = flash_make_addr(info, 0, 0); | |
678 | cptr.cp = (uchar *)dest; | |
679 | ||
680 | ||
681 | /* Check if Flash is (sufficiently) erased */ | |
682 | switch(info->portwidth) { | |
683 | case FLASH_CFI_8BIT: | |
684 | flag = ((cptr.cp[0] & cword.c) == cword.c); | |
685 | break; | |
686 | case FLASH_CFI_16BIT: | |
687 | flag = ((cptr.wp[0] & cword.w) == cword.w); | |
688 | break; | |
689 | case FLASH_CFI_32BIT: | |
690 | flag = ((cptr.lp[0] & cword.l) == cword.l); | |
691 | break; | |
692 | default: | |
693 | return 2; | |
694 | } | |
695 | if(!flag) | |
696 | return 2; | |
697 | ||
698 | /* Disable interrupts which might cause a timeout here */ | |
699 | flag = disable_interrupts(); | |
700 | ||
701 | flash_write_cmd(info, 0, 0, FLASH_CMD_CLEAR_STATUS); | |
702 | flash_write_cmd(info, 0, 0, FLASH_CMD_WRITE); | |
703 | ||
704 | switch(info->portwidth) { | |
705 | case FLASH_CFI_8BIT: | |
706 | cptr.cp[0] = cword.c; | |
707 | break; | |
708 | case FLASH_CFI_16BIT: | |
709 | cptr.wp[0] = cword.w; | |
710 | break; | |
711 | case FLASH_CFI_32BIT: | |
712 | cptr.lp[0] = cword.l; | |
713 | break; | |
714 | } | |
715 | ||
716 | /* re-enable interrupts if necessary */ | |
717 | if(flag) | |
718 | enable_interrupts(); | |
719 | ||
720 | return flash_full_status_check(info, 0, info->write_tout, "write"); | |
721 | } | |
722 | ||
6d0f6bcf | 723 | #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE |
652a10c0 WD |
724 | |
725 | /* loop through the sectors from the highest address | |
726 | * when the passed address is greater or equal to the sector address | |
727 | * we have a match | |
728 | */ | |
729 | static int find_sector(flash_info_t *info, ulong addr) | |
730 | { | |
731 | int sector; | |
732 | for(sector = info->sector_count - 1; sector >= 0; sector--) { | |
733 | if(addr >= info->start[sector]) | |
734 | break; | |
735 | } | |
736 | return sector; | |
737 | } | |
738 | ||
739 | static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, int len) | |
740 | { | |
741 | ||
742 | int sector; | |
743 | int cnt; | |
744 | int retcode; | |
745 | volatile cfiptr_t src; | |
746 | volatile cfiptr_t dst; | |
747 | ||
748 | src.cp = cp; | |
749 | dst.cp = (uchar *)dest; | |
750 | sector = find_sector(info, dest); | |
751 | flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS); | |
752 | flash_write_cmd(info, sector, 0, FLASH_CMD_WRITE_TO_BUFFER); | |
753 | if((retcode = flash_status_check(info, sector, info->buffer_write_tout, | |
754 | "write to buffer")) == ERR_OK) { | |
755 | switch(info->portwidth) { | |
756 | case FLASH_CFI_8BIT: | |
757 | cnt = len; | |
758 | break; | |
759 | case FLASH_CFI_16BIT: | |
760 | cnt = len >> 1; | |
761 | break; | |
762 | case FLASH_CFI_32BIT: | |
763 | cnt = len >> 2; | |
764 | break; | |
765 | default: | |
766 | return ERR_INVAL; | |
767 | break; | |
768 | } | |
769 | flash_write_cmd(info, sector, 0, (uchar)cnt-1); | |
770 | while(cnt-- > 0) { | |
771 | switch(info->portwidth) { | |
772 | case FLASH_CFI_8BIT: | |
773 | *dst.cp++ = *src.cp++; | |
774 | break; | |
775 | case FLASH_CFI_16BIT: | |
776 | *dst.wp++ = *src.wp++; | |
777 | break; | |
778 | case FLASH_CFI_32BIT: | |
779 | *dst.lp++ = *src.lp++; | |
780 | break; | |
781 | default: | |
782 | return ERR_INVAL; | |
783 | break; | |
784 | } | |
785 | } | |
786 | flash_write_cmd(info, sector, 0, FLASH_CMD_WRITE_BUFFER_CONFIRM); | |
787 | retcode = flash_full_status_check(info, sector, info->buffer_write_tout, | |
788 | "buffer write"); | |
789 | } | |
790 | flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS); | |
791 | return retcode; | |
792 | } | |
6d0f6bcf | 793 | #endif /* CONFIG_SYS_USE_FLASH_BUFFER_WRITE */ |