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932394ac WD |
1 | /* |
2 | * drivers/mtd/nand.c | |
3 | * | |
4 | * Overview: | |
5 | * This is the generic MTD driver for NAND flash devices. It should be | |
6 | * capable of working with almost all NAND chips currently available. | |
7 | * Basic support for AG-AND chips is provided. | |
ac7eb8a3 | 8 | * |
932394ac WD |
9 | * Additional technical information is available on |
10 | * http://www.linux-mtd.infradead.org/tech/nand.html | |
ac7eb8a3 | 11 | * |
932394ac WD |
12 | * Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com) |
13 | * 2002 Thomas Gleixner (tglx@linutronix.de) | |
14 | * | |
ac7eb8a3 | 15 | * 02-08-2004 tglx: support for strange chips, which cannot auto increment |
932394ac WD |
16 | * pages on read / read_oob |
17 | * | |
18 | * 03-17-2004 tglx: Check ready before auto increment check. Simon Bayes | |
19 | * pointed this out, as he marked an auto increment capable chip | |
20 | * as NOAUTOINCR in the board driver. | |
21 | * Make reads over block boundaries work too | |
22 | * | |
23 | * 04-14-2004 tglx: first working version for 2k page size chips | |
ac7eb8a3 | 24 | * |
932394ac WD |
25 | * 05-19-2004 tglx: Basic support for Renesas AG-AND chips |
26 | * | |
27 | * 09-24-2004 tglx: add support for hardware controllers (e.g. ECC) shared | |
28 | * among multiple independend devices. Suggestions and initial patch | |
29 | * from Ben Dooks <ben-mtd@fluff.org> | |
30 | * | |
31 | * Credits: | |
ac7eb8a3 WD |
32 | * David Woodhouse for adding multichip support |
33 | * | |
932394ac WD |
34 | * Aleph One Ltd. and Toby Churchill Ltd. for supporting the |
35 | * rework for 2K page size chips | |
36 | * | |
37 | * TODO: | |
38 | * Enable cached programming for 2k page size chips | |
39 | * Check, if mtd->ecctype should be set to MTD_ECC_HW | |
40 | * if we have HW ecc support. | |
41 | * The AG-AND chips have nice features for speed improvement, | |
42 | * which are not supported yet. Read / program 4 pages in one go. | |
43 | * | |
44 | * $Id: nand_base.c,v 1.126 2004/12/13 11:22:25 lavinen Exp $ | |
45 | * | |
46 | * This program is free software; you can redistribute it and/or modify | |
47 | * it under the terms of the GNU General Public License version 2 as | |
48 | * published by the Free Software Foundation. | |
49 | * | |
50 | */ | |
51 | ||
52 | /* XXX U-BOOT XXX */ | |
53 | #if 0 | |
54 | #include <linux/delay.h> | |
55 | #include <linux/errno.h> | |
56 | #include <linux/sched.h> | |
57 | #include <linux/slab.h> | |
58 | #include <linux/types.h> | |
59 | #include <linux/mtd/mtd.h> | |
60 | #include <linux/mtd/nand.h> | |
61 | #include <linux/mtd/nand_ecc.h> | |
62 | #include <linux/mtd/compatmac.h> | |
63 | #include <linux/interrupt.h> | |
64 | #include <linux/bitops.h> | |
65 | #include <asm/io.h> | |
66 | ||
67 | #ifdef CONFIG_MTD_PARTITIONS | |
68 | #include <linux/mtd/partitions.h> | |
69 | #endif | |
70 | ||
ac7eb8a3 | 71 | #endif |
932394ac WD |
72 | |
73 | #include <common.h> | |
038ccac5 | 74 | #ifdef CONFIG_NEW_NAND_CODE |
932394ac WD |
75 | |
76 | #if (CONFIG_COMMANDS & CFG_CMD_NAND) | |
77 | ||
78 | #include <malloc.h> | |
79 | #include <watchdog.h> | |
80 | #include <linux/mtd/compat.h> | |
81 | #include <linux/mtd/mtd.h> | |
82 | #include <linux/mtd/nand.h> | |
83 | #include <linux/mtd/nand_ecc.h> | |
84 | ||
85 | #include <asm/io.h> | |
86 | #include <asm/errno.h> | |
87 | ||
88 | #ifdef CONFIG_JFFS2_NAND | |
89 | #include <jffs2/jffs2.h> | |
90 | #endif | |
91 | ||
932394ac WD |
92 | /* Define default oob placement schemes for large and small page devices */ |
93 | static struct nand_oobinfo nand_oob_8 = { | |
94 | .useecc = MTD_NANDECC_AUTOPLACE, | |
95 | .eccbytes = 3, | |
96 | .eccpos = {0, 1, 2}, | |
97 | .oobfree = { {3, 2}, {6, 2} } | |
98 | }; | |
99 | ||
100 | static struct nand_oobinfo nand_oob_16 = { | |
101 | .useecc = MTD_NANDECC_AUTOPLACE, | |
102 | .eccbytes = 6, | |
103 | .eccpos = {0, 1, 2, 3, 6, 7}, | |
104 | .oobfree = { {8, 8} } | |
105 | }; | |
106 | ||
107 | static struct nand_oobinfo nand_oob_64 = { | |
108 | .useecc = MTD_NANDECC_AUTOPLACE, | |
109 | .eccbytes = 24, | |
110 | .eccpos = { | |
ac7eb8a3 WD |
111 | 40, 41, 42, 43, 44, 45, 46, 47, |
112 | 48, 49, 50, 51, 52, 53, 54, 55, | |
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113 | 56, 57, 58, 59, 60, 61, 62, 63}, |
114 | .oobfree = { {2, 38} } | |
115 | }; | |
116 | ||
117 | /* This is used for padding purposes in nand_write_oob */ | |
118 | static u_char ffchars[] = { | |
119 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
120 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
121 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
122 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
123 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
124 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
125 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
126 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
127 | }; | |
128 | ||
129 | /* | |
130 | * NAND low-level MTD interface functions | |
131 | */ | |
132 | static void nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len); | |
133 | static void nand_read_buf(struct mtd_info *mtd, u_char *buf, int len); | |
134 | static int nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len); | |
135 | ||
136 | static int nand_read (struct mtd_info *mtd, loff_t from, size_t len, size_t * retlen, u_char * buf); | |
137 | static int nand_read_ecc (struct mtd_info *mtd, loff_t from, size_t len, | |
138 | size_t * retlen, u_char * buf, u_char * eccbuf, struct nand_oobinfo *oobsel); | |
139 | static int nand_read_oob (struct mtd_info *mtd, loff_t from, size_t len, size_t * retlen, u_char * buf); | |
140 | static int nand_write (struct mtd_info *mtd, loff_t to, size_t len, size_t * retlen, const u_char * buf); | |
141 | static int nand_write_ecc (struct mtd_info *mtd, loff_t to, size_t len, | |
142 | size_t * retlen, const u_char * buf, u_char * eccbuf, struct nand_oobinfo *oobsel); | |
143 | static int nand_write_oob (struct mtd_info *mtd, loff_t to, size_t len, size_t * retlen, const u_char *buf); | |
144 | /* XXX U-BOOT XXX */ | |
145 | #if 0 | |
146 | static int nand_writev (struct mtd_info *mtd, const struct kvec *vecs, | |
147 | unsigned long count, loff_t to, size_t * retlen); | |
148 | static int nand_writev_ecc (struct mtd_info *mtd, const struct kvec *vecs, | |
149 | unsigned long count, loff_t to, size_t * retlen, u_char *eccbuf, struct nand_oobinfo *oobsel); | |
150 | #endif | |
151 | static int nand_erase (struct mtd_info *mtd, struct erase_info *instr); | |
152 | static void nand_sync (struct mtd_info *mtd); | |
153 | ||
154 | /* Some internal functions */ | |
155 | static int nand_write_page (struct mtd_info *mtd, struct nand_chip *this, int page, u_char *oob_buf, | |
156 | struct nand_oobinfo *oobsel, int mode); | |
157 | #ifdef CONFIG_MTD_NAND_VERIFY_WRITE | |
ac7eb8a3 | 158 | static int nand_verify_pages (struct mtd_info *mtd, struct nand_chip *this, int page, int numpages, |
932394ac WD |
159 | u_char *oob_buf, struct nand_oobinfo *oobsel, int chipnr, int oobmode); |
160 | #else | |
161 | #define nand_verify_pages(...) (0) | |
162 | #endif | |
ac7eb8a3 | 163 | |
932394ac WD |
164 | static void nand_get_device (struct nand_chip *this, struct mtd_info *mtd, int new_state); |
165 | ||
166 | /** | |
167 | * nand_release_device - [GENERIC] release chip | |
168 | * @mtd: MTD device structure | |
ac7eb8a3 WD |
169 | * |
170 | * Deselect, release chip lock and wake up anyone waiting on the device | |
932394ac WD |
171 | */ |
172 | /* XXX U-BOOT XXX */ | |
173 | #if 0 | |
174 | static void nand_release_device (struct mtd_info *mtd) | |
175 | { | |
176 | struct nand_chip *this = mtd->priv; | |
177 | ||
178 | /* De-select the NAND device */ | |
179 | this->select_chip(mtd, -1); | |
180 | /* Do we have a hardware controller ? */ | |
181 | if (this->controller) { | |
182 | spin_lock(&this->controller->lock); | |
183 | this->controller->active = NULL; | |
184 | spin_unlock(&this->controller->lock); | |
185 | } | |
186 | /* Release the chip */ | |
187 | spin_lock (&this->chip_lock); | |
188 | this->state = FL_READY; | |
189 | wake_up (&this->wq); | |
190 | spin_unlock (&this->chip_lock); | |
191 | } | |
192 | #else | |
8e9655f8 WD |
193 | static void nand_release_device (struct mtd_info *mtd) |
194 | { | |
195 | struct nand_chip *this = mtd->priv; | |
196 | this->select_chip(mtd, -1); /* De-select the NAND device */ | |
197 | } | |
932394ac WD |
198 | #endif |
199 | ||
200 | /** | |
201 | * nand_read_byte - [DEFAULT] read one byte from the chip | |
202 | * @mtd: MTD device structure | |
203 | * | |
204 | * Default read function for 8bit buswith | |
205 | */ | |
206 | static u_char nand_read_byte(struct mtd_info *mtd) | |
207 | { | |
208 | struct nand_chip *this = mtd->priv; | |
209 | return readb(this->IO_ADDR_R); | |
210 | } | |
211 | ||
212 | /** | |
213 | * nand_write_byte - [DEFAULT] write one byte to the chip | |
214 | * @mtd: MTD device structure | |
215 | * @byte: pointer to data byte to write | |
216 | * | |
217 | * Default write function for 8it buswith | |
218 | */ | |
219 | static void nand_write_byte(struct mtd_info *mtd, u_char byte) | |
220 | { | |
221 | struct nand_chip *this = mtd->priv; | |
222 | writeb(byte, this->IO_ADDR_W); | |
223 | } | |
224 | ||
225 | /** | |
226 | * nand_read_byte16 - [DEFAULT] read one byte endianess aware from the chip | |
227 | * @mtd: MTD device structure | |
228 | * | |
ac7eb8a3 | 229 | * Default read function for 16bit buswith with |
932394ac WD |
230 | * endianess conversion |
231 | */ | |
232 | static u_char nand_read_byte16(struct mtd_info *mtd) | |
233 | { | |
234 | struct nand_chip *this = mtd->priv; | |
235 | return (u_char) cpu_to_le16(readw(this->IO_ADDR_R)); | |
236 | } | |
237 | ||
238 | /** | |
239 | * nand_write_byte16 - [DEFAULT] write one byte endianess aware to the chip | |
240 | * @mtd: MTD device structure | |
241 | * @byte: pointer to data byte to write | |
242 | * | |
243 | * Default write function for 16bit buswith with | |
244 | * endianess conversion | |
245 | */ | |
246 | static void nand_write_byte16(struct mtd_info *mtd, u_char byte) | |
247 | { | |
248 | struct nand_chip *this = mtd->priv; | |
249 | writew(le16_to_cpu((u16) byte), this->IO_ADDR_W); | |
250 | } | |
251 | ||
252 | /** | |
253 | * nand_read_word - [DEFAULT] read one word from the chip | |
254 | * @mtd: MTD device structure | |
255 | * | |
ac7eb8a3 | 256 | * Default read function for 16bit buswith without |
932394ac WD |
257 | * endianess conversion |
258 | */ | |
259 | static u16 nand_read_word(struct mtd_info *mtd) | |
260 | { | |
261 | struct nand_chip *this = mtd->priv; | |
262 | return readw(this->IO_ADDR_R); | |
263 | } | |
264 | ||
265 | /** | |
266 | * nand_write_word - [DEFAULT] write one word to the chip | |
267 | * @mtd: MTD device structure | |
268 | * @word: data word to write | |
269 | * | |
ac7eb8a3 | 270 | * Default write function for 16bit buswith without |
932394ac WD |
271 | * endianess conversion |
272 | */ | |
273 | static void nand_write_word(struct mtd_info *mtd, u16 word) | |
274 | { | |
275 | struct nand_chip *this = mtd->priv; | |
276 | writew(word, this->IO_ADDR_W); | |
277 | } | |
278 | ||
279 | /** | |
280 | * nand_select_chip - [DEFAULT] control CE line | |
281 | * @mtd: MTD device structure | |
282 | * @chip: chipnumber to select, -1 for deselect | |
283 | * | |
284 | * Default select function for 1 chip devices. | |
285 | */ | |
286 | static void nand_select_chip(struct mtd_info *mtd, int chip) | |
287 | { | |
288 | struct nand_chip *this = mtd->priv; | |
289 | switch(chip) { | |
290 | case -1: | |
ac7eb8a3 | 291 | this->hwcontrol(mtd, NAND_CTL_CLRNCE); |
932394ac WD |
292 | break; |
293 | case 0: | |
294 | this->hwcontrol(mtd, NAND_CTL_SETNCE); | |
295 | break; | |
296 | ||
297 | default: | |
298 | BUG(); | |
299 | } | |
300 | } | |
301 | ||
302 | /** | |
303 | * nand_write_buf - [DEFAULT] write buffer to chip | |
304 | * @mtd: MTD device structure | |
305 | * @buf: data buffer | |
306 | * @len: number of bytes to write | |
307 | * | |
308 | * Default write function for 8bit buswith | |
309 | */ | |
310 | static void nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len) | |
311 | { | |
312 | int i; | |
313 | struct nand_chip *this = mtd->priv; | |
314 | ||
315 | for (i=0; i<len; i++) | |
316 | writeb(buf[i], this->IO_ADDR_W); | |
317 | } | |
318 | ||
319 | /** | |
ac7eb8a3 | 320 | * nand_read_buf - [DEFAULT] read chip data into buffer |
932394ac WD |
321 | * @mtd: MTD device structure |
322 | * @buf: buffer to store date | |
323 | * @len: number of bytes to read | |
324 | * | |
325 | * Default read function for 8bit buswith | |
326 | */ | |
327 | static void nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) | |
328 | { | |
329 | int i; | |
330 | struct nand_chip *this = mtd->priv; | |
331 | ||
332 | for (i=0; i<len; i++) | |
333 | buf[i] = readb(this->IO_ADDR_R); | |
334 | } | |
335 | ||
336 | /** | |
ac7eb8a3 | 337 | * nand_verify_buf - [DEFAULT] Verify chip data against buffer |
932394ac WD |
338 | * @mtd: MTD device structure |
339 | * @buf: buffer containing the data to compare | |
340 | * @len: number of bytes to compare | |
341 | * | |
342 | * Default verify function for 8bit buswith | |
343 | */ | |
344 | static int nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len) | |
345 | { | |
346 | int i; | |
347 | struct nand_chip *this = mtd->priv; | |
348 | ||
349 | for (i=0; i<len; i++) | |
350 | if (buf[i] != readb(this->IO_ADDR_R)) | |
351 | return -EFAULT; | |
352 | ||
353 | return 0; | |
354 | } | |
355 | ||
356 | /** | |
357 | * nand_write_buf16 - [DEFAULT] write buffer to chip | |
358 | * @mtd: MTD device structure | |
359 | * @buf: data buffer | |
360 | * @len: number of bytes to write | |
361 | * | |
362 | * Default write function for 16bit buswith | |
363 | */ | |
364 | static void nand_write_buf16(struct mtd_info *mtd, const u_char *buf, int len) | |
365 | { | |
366 | int i; | |
367 | struct nand_chip *this = mtd->priv; | |
368 | u16 *p = (u16 *) buf; | |
369 | len >>= 1; | |
ac7eb8a3 | 370 | |
932394ac WD |
371 | for (i=0; i<len; i++) |
372 | writew(p[i], this->IO_ADDR_W); | |
ac7eb8a3 | 373 | |
932394ac WD |
374 | } |
375 | ||
376 | /** | |
ac7eb8a3 | 377 | * nand_read_buf16 - [DEFAULT] read chip data into buffer |
932394ac WD |
378 | * @mtd: MTD device structure |
379 | * @buf: buffer to store date | |
380 | * @len: number of bytes to read | |
381 | * | |
382 | * Default read function for 16bit buswith | |
383 | */ | |
384 | static void nand_read_buf16(struct mtd_info *mtd, u_char *buf, int len) | |
385 | { | |
386 | int i; | |
387 | struct nand_chip *this = mtd->priv; | |
388 | u16 *p = (u16 *) buf; | |
389 | len >>= 1; | |
390 | ||
391 | for (i=0; i<len; i++) | |
392 | p[i] = readw(this->IO_ADDR_R); | |
393 | } | |
394 | ||
395 | /** | |
ac7eb8a3 | 396 | * nand_verify_buf16 - [DEFAULT] Verify chip data against buffer |
932394ac WD |
397 | * @mtd: MTD device structure |
398 | * @buf: buffer containing the data to compare | |
399 | * @len: number of bytes to compare | |
400 | * | |
401 | * Default verify function for 16bit buswith | |
402 | */ | |
403 | static int nand_verify_buf16(struct mtd_info *mtd, const u_char *buf, int len) | |
404 | { | |
405 | int i; | |
406 | struct nand_chip *this = mtd->priv; | |
407 | u16 *p = (u16 *) buf; | |
408 | len >>= 1; | |
409 | ||
410 | for (i=0; i<len; i++) | |
411 | if (p[i] != readw(this->IO_ADDR_R)) | |
412 | return -EFAULT; | |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
417 | /** | |
418 | * nand_block_bad - [DEFAULT] Read bad block marker from the chip | |
419 | * @mtd: MTD device structure | |
420 | * @ofs: offset from device start | |
421 | * @getchip: 0, if the chip is already selected | |
422 | * | |
ac7eb8a3 | 423 | * Check, if the block is bad. |
932394ac WD |
424 | */ |
425 | static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) | |
426 | { | |
427 | int page, chipnr, res = 0; | |
428 | struct nand_chip *this = mtd->priv; | |
429 | u16 bad; | |
430 | ||
431 | if (getchip) { | |
432 | page = (int)(ofs >> this->page_shift); | |
433 | chipnr = (int)(ofs >> this->chip_shift); | |
434 | ||
435 | /* Grab the lock and see if the device is available */ | |
436 | nand_get_device (this, mtd, FL_READING); | |
437 | ||
438 | /* Select the NAND device */ | |
439 | this->select_chip(mtd, chipnr); | |
ac7eb8a3 WD |
440 | } else |
441 | page = (int) ofs; | |
932394ac WD |
442 | |
443 | if (this->options & NAND_BUSWIDTH_16) { | |
444 | this->cmdfunc (mtd, NAND_CMD_READOOB, this->badblockpos & 0xFE, page & this->pagemask); | |
445 | bad = cpu_to_le16(this->read_word(mtd)); | |
446 | if (this->badblockpos & 0x1) | |
447 | bad >>= 1; | |
448 | if ((bad & 0xFF) != 0xff) | |
449 | res = 1; | |
450 | } else { | |
451 | this->cmdfunc (mtd, NAND_CMD_READOOB, this->badblockpos, page & this->pagemask); | |
452 | if (this->read_byte(mtd) != 0xff) | |
453 | res = 1; | |
454 | } | |
ac7eb8a3 | 455 | |
932394ac WD |
456 | if (getchip) { |
457 | /* Deselect and wake up anyone waiting on the device */ | |
458 | nand_release_device(mtd); | |
ac7eb8a3 WD |
459 | } |
460 | ||
932394ac WD |
461 | return res; |
462 | } | |
463 | ||
464 | /** | |
465 | * nand_default_block_markbad - [DEFAULT] mark a block bad | |
466 | * @mtd: MTD device structure | |
467 | * @ofs: offset from device start | |
468 | * | |
469 | * This is the default implementation, which can be overridden by | |
470 | * a hardware specific driver. | |
471 | */ | |
472 | static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs) | |
473 | { | |
474 | struct nand_chip *this = mtd->priv; | |
475 | u_char buf[2] = {0, 0}; | |
476 | size_t retlen; | |
477 | int block; | |
ac7eb8a3 | 478 | |
932394ac WD |
479 | /* Get block number */ |
480 | block = ((int) ofs) >> this->bbt_erase_shift; | |
481 | this->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1); | |
482 | ||
483 | /* Do we have a flash based bad block table ? */ | |
484 | if (this->options & NAND_USE_FLASH_BBT) | |
485 | return nand_update_bbt (mtd, ofs); | |
ac7eb8a3 | 486 | |
932394ac WD |
487 | /* We write two bytes, so we dont have to mess with 16 bit access */ |
488 | ofs += mtd->oobsize + (this->badblockpos & ~0x01); | |
489 | return nand_write_oob (mtd, ofs , 2, &retlen, buf); | |
490 | } | |
491 | ||
ac7eb8a3 | 492 | /** |
932394ac WD |
493 | * nand_check_wp - [GENERIC] check if the chip is write protected |
494 | * @mtd: MTD device structure | |
ac7eb8a3 | 495 | * Check, if the device is write protected |
932394ac | 496 | * |
ac7eb8a3 | 497 | * The function expects, that the device is already selected |
932394ac WD |
498 | */ |
499 | static int nand_check_wp (struct mtd_info *mtd) | |
500 | { | |
501 | struct nand_chip *this = mtd->priv; | |
502 | /* Check the WP bit */ | |
503 | this->cmdfunc (mtd, NAND_CMD_STATUS, -1, -1); | |
ac7eb8a3 | 504 | return (this->read_byte(mtd) & 0x80) ? 0 : 1; |
932394ac WD |
505 | } |
506 | ||
507 | /** | |
508 | * nand_block_checkbad - [GENERIC] Check if a block is marked bad | |
509 | * @mtd: MTD device structure | |
510 | * @ofs: offset from device start | |
511 | * @getchip: 0, if the chip is already selected | |
512 | * @allowbbt: 1, if its allowed to access the bbt area | |
513 | * | |
514 | * Check, if the block is bad. Either by reading the bad block table or | |
515 | * calling of the scan function. | |
516 | */ | |
517 | static int nand_block_checkbad (struct mtd_info *mtd, loff_t ofs, int getchip, int allowbbt) | |
518 | { | |
519 | struct nand_chip *this = mtd->priv; | |
ac7eb8a3 | 520 | |
932394ac WD |
521 | if (!this->bbt) |
522 | return this->block_bad(mtd, ofs, getchip); | |
ac7eb8a3 | 523 | |
932394ac WD |
524 | /* Return info from the table */ |
525 | return nand_isbad_bbt (mtd, ofs, allowbbt); | |
526 | } | |
527 | ||
528 | /** | |
529 | * nand_command - [DEFAULT] Send command to NAND device | |
530 | * @mtd: MTD device structure | |
531 | * @command: the command to be sent | |
532 | * @column: the column address for this command, -1 if none | |
533 | * @page_addr: the page address for this command, -1 if none | |
534 | * | |
535 | * Send command to NAND device. This function is used for small page | |
536 | * devices (256/512 Bytes per page) | |
537 | */ | |
538 | static void nand_command (struct mtd_info *mtd, unsigned command, int column, int page_addr) | |
539 | { | |
540 | register struct nand_chip *this = mtd->priv; | |
541 | ||
542 | /* Begin command latch cycle */ | |
543 | this->hwcontrol(mtd, NAND_CTL_SETCLE); | |
544 | /* | |
545 | * Write out the command to the device. | |
546 | */ | |
547 | if (command == NAND_CMD_SEQIN) { | |
548 | int readcmd; | |
549 | ||
550 | if (column >= mtd->oobblock) { | |
551 | /* OOB area */ | |
552 | column -= mtd->oobblock; | |
553 | readcmd = NAND_CMD_READOOB; | |
554 | } else if (column < 256) { | |
555 | /* First 256 bytes --> READ0 */ | |
556 | readcmd = NAND_CMD_READ0; | |
557 | } else { | |
558 | column -= 256; | |
559 | readcmd = NAND_CMD_READ1; | |
560 | } | |
561 | this->write_byte(mtd, readcmd); | |
562 | } | |
563 | this->write_byte(mtd, command); | |
564 | ||
565 | /* Set ALE and clear CLE to start address cycle */ | |
566 | this->hwcontrol(mtd, NAND_CTL_CLRCLE); | |
567 | ||
568 | if (column != -1 || page_addr != -1) { | |
569 | this->hwcontrol(mtd, NAND_CTL_SETALE); | |
570 | ||
571 | /* Serially input address */ | |
572 | if (column != -1) { | |
573 | /* Adjust columns for 16 bit buswidth */ | |
574 | if (this->options & NAND_BUSWIDTH_16) | |
575 | column >>= 1; | |
576 | this->write_byte(mtd, column); | |
577 | } | |
578 | if (page_addr != -1) { | |
579 | this->write_byte(mtd, (unsigned char) (page_addr & 0xff)); | |
580 | this->write_byte(mtd, (unsigned char) ((page_addr >> 8) & 0xff)); | |
581 | /* One more address cycle for devices > 32MiB */ | |
582 | if (this->chipsize > (32 << 20)) | |
583 | this->write_byte(mtd, (unsigned char) ((page_addr >> 16) & 0x0f)); | |
584 | } | |
585 | /* Latch in address */ | |
586 | this->hwcontrol(mtd, NAND_CTL_CLRALE); | |
587 | } | |
ac7eb8a3 WD |
588 | |
589 | /* | |
590 | * program and erase have their own busy handlers | |
932394ac WD |
591 | * status and sequential in needs no delay |
592 | */ | |
593 | switch (command) { | |
ac7eb8a3 | 594 | |
932394ac WD |
595 | case NAND_CMD_PAGEPROG: |
596 | case NAND_CMD_ERASE1: | |
597 | case NAND_CMD_ERASE2: | |
598 | case NAND_CMD_SEQIN: | |
599 | case NAND_CMD_STATUS: | |
600 | return; | |
601 | ||
602 | case NAND_CMD_RESET: | |
ac7eb8a3 | 603 | if (this->dev_ready) |
932394ac WD |
604 | break; |
605 | udelay(this->chip_delay); | |
606 | this->hwcontrol(mtd, NAND_CTL_SETCLE); | |
607 | this->write_byte(mtd, NAND_CMD_STATUS); | |
608 | this->hwcontrol(mtd, NAND_CTL_CLRCLE); | |
609 | while ( !(this->read_byte(mtd) & 0x40)); | |
610 | return; | |
611 | ||
ac7eb8a3 | 612 | /* This applies to read commands */ |
932394ac | 613 | default: |
ac7eb8a3 | 614 | /* |
932394ac WD |
615 | * If we don't have access to the busy pin, we apply the given |
616 | * command delay | |
617 | */ | |
618 | if (!this->dev_ready) { | |
619 | udelay (this->chip_delay); | |
620 | return; | |
ac7eb8a3 | 621 | } |
932394ac | 622 | } |
ac7eb8a3 | 623 | |
932394ac WD |
624 | /* Apply this short delay always to ensure that we do wait tWB in |
625 | * any case on any machine. */ | |
626 | ndelay (100); | |
627 | /* wait until command is processed */ | |
628 | while (!this->dev_ready(mtd)); | |
629 | } | |
630 | ||
631 | /** | |
632 | * nand_command_lp - [DEFAULT] Send command to NAND large page device | |
633 | * @mtd: MTD device structure | |
634 | * @command: the command to be sent | |
635 | * @column: the column address for this command, -1 if none | |
636 | * @page_addr: the page address for this command, -1 if none | |
637 | * | |
638 | * Send command to NAND device. This is the version for the new large page devices | |
639 | * We dont have the seperate regions as we have in the small page devices. | |
640 | * We must emulate NAND_CMD_READOOB to keep the code compatible. | |
641 | * | |
642 | */ | |
643 | static void nand_command_lp (struct mtd_info *mtd, unsigned command, int column, int page_addr) | |
644 | { | |
645 | register struct nand_chip *this = mtd->priv; | |
646 | ||
647 | /* Emulate NAND_CMD_READOOB */ | |
648 | if (command == NAND_CMD_READOOB) { | |
649 | column += mtd->oobblock; | |
650 | command = NAND_CMD_READ0; | |
651 | } | |
ac7eb8a3 WD |
652 | |
653 | ||
932394ac WD |
654 | /* Begin command latch cycle */ |
655 | this->hwcontrol(mtd, NAND_CTL_SETCLE); | |
656 | /* Write out the command to the device. */ | |
657 | this->write_byte(mtd, command); | |
658 | /* End command latch cycle */ | |
659 | this->hwcontrol(mtd, NAND_CTL_CLRCLE); | |
660 | ||
661 | if (column != -1 || page_addr != -1) { | |
662 | this->hwcontrol(mtd, NAND_CTL_SETALE); | |
663 | ||
664 | /* Serially input address */ | |
665 | if (column != -1) { | |
666 | /* Adjust columns for 16 bit buswidth */ | |
667 | if (this->options & NAND_BUSWIDTH_16) | |
668 | column >>= 1; | |
669 | this->write_byte(mtd, column & 0xff); | |
670 | this->write_byte(mtd, column >> 8); | |
ac7eb8a3 | 671 | } |
932394ac WD |
672 | if (page_addr != -1) { |
673 | this->write_byte(mtd, (unsigned char) (page_addr & 0xff)); | |
674 | this->write_byte(mtd, (unsigned char) ((page_addr >> 8) & 0xff)); | |
675 | /* One more address cycle for devices > 128MiB */ | |
676 | if (this->chipsize > (128 << 20)) | |
677 | this->write_byte(mtd, (unsigned char) ((page_addr >> 16) & 0xff)); | |
678 | } | |
679 | /* Latch in address */ | |
680 | this->hwcontrol(mtd, NAND_CTL_CLRALE); | |
681 | } | |
ac7eb8a3 WD |
682 | |
683 | /* | |
684 | * program and erase have their own busy handlers | |
932394ac WD |
685 | * status and sequential in needs no delay |
686 | */ | |
687 | switch (command) { | |
ac7eb8a3 | 688 | |
932394ac WD |
689 | case NAND_CMD_CACHEDPROG: |
690 | case NAND_CMD_PAGEPROG: | |
691 | case NAND_CMD_ERASE1: | |
692 | case NAND_CMD_ERASE2: | |
693 | case NAND_CMD_SEQIN: | |
694 | case NAND_CMD_STATUS: | |
695 | return; | |
696 | ||
697 | ||
698 | case NAND_CMD_RESET: | |
ac7eb8a3 | 699 | if (this->dev_ready) |
932394ac WD |
700 | break; |
701 | udelay(this->chip_delay); | |
702 | this->hwcontrol(mtd, NAND_CTL_SETCLE); | |
703 | this->write_byte(mtd, NAND_CMD_STATUS); | |
704 | this->hwcontrol(mtd, NAND_CTL_CLRCLE); | |
705 | while ( !(this->read_byte(mtd) & 0x40)); | |
706 | return; | |
707 | ||
708 | case NAND_CMD_READ0: | |
709 | /* Begin command latch cycle */ | |
710 | this->hwcontrol(mtd, NAND_CTL_SETCLE); | |
711 | /* Write out the start read command */ | |
712 | this->write_byte(mtd, NAND_CMD_READSTART); | |
713 | /* End command latch cycle */ | |
714 | this->hwcontrol(mtd, NAND_CTL_CLRCLE); | |
715 | /* Fall through into ready check */ | |
ac7eb8a3 WD |
716 | |
717 | /* This applies to read commands */ | |
932394ac | 718 | default: |
ac7eb8a3 | 719 | /* |
932394ac WD |
720 | * If we don't have access to the busy pin, we apply the given |
721 | * command delay | |
722 | */ | |
723 | if (!this->dev_ready) { | |
724 | udelay (this->chip_delay); | |
725 | return; | |
ac7eb8a3 | 726 | } |
932394ac | 727 | } |
ac7eb8a3 | 728 | |
932394ac WD |
729 | /* Apply this short delay always to ensure that we do wait tWB in |
730 | * any case on any machine. */ | |
731 | ndelay (100); | |
732 | /* wait until command is processed */ | |
733 | while (!this->dev_ready(mtd)); | |
734 | } | |
735 | ||
736 | /** | |
737 | * nand_get_device - [GENERIC] Get chip for selected access | |
738 | * @this: the nand chip descriptor | |
739 | * @mtd: MTD device structure | |
ac7eb8a3 | 740 | * @new_state: the state which is requested |
932394ac WD |
741 | * |
742 | * Get the device and lock it for exclusive access | |
743 | */ | |
744 | /* XXX U-BOOT XXX */ | |
745 | #if 0 | |
746 | static void nand_get_device (struct nand_chip *this, struct mtd_info *mtd, int new_state) | |
747 | { | |
748 | struct nand_chip *active = this; | |
749 | ||
750 | DECLARE_WAITQUEUE (wait, current); | |
751 | ||
ac7eb8a3 WD |
752 | /* |
753 | * Grab the lock and see if the device is available | |
932394ac WD |
754 | */ |
755 | retry: | |
756 | /* Hardware controller shared among independend devices */ | |
757 | if (this->controller) { | |
758 | spin_lock (&this->controller->lock); | |
759 | if (this->controller->active) | |
760 | active = this->controller->active; | |
761 | else | |
762 | this->controller->active = this; | |
763 | spin_unlock (&this->controller->lock); | |
764 | } | |
ac7eb8a3 | 765 | |
932394ac WD |
766 | if (active == this) { |
767 | spin_lock (&this->chip_lock); | |
768 | if (this->state == FL_READY) { | |
769 | this->state = new_state; | |
770 | spin_unlock (&this->chip_lock); | |
771 | return; | |
772 | } | |
ac7eb8a3 | 773 | } |
932394ac WD |
774 | set_current_state (TASK_UNINTERRUPTIBLE); |
775 | add_wait_queue (&active->wq, &wait); | |
776 | spin_unlock (&active->chip_lock); | |
777 | schedule (); | |
778 | remove_wait_queue (&active->wq, &wait); | |
779 | goto retry; | |
780 | } | |
781 | #else | |
782 | static void nand_get_device (struct nand_chip *this, struct mtd_info *mtd, int new_state) {} | |
783 | #endif | |
784 | ||
785 | /** | |
786 | * nand_wait - [DEFAULT] wait until the command is done | |
787 | * @mtd: MTD device structure | |
788 | * @this: NAND chip structure | |
789 | * @state: state to select the max. timeout value | |
790 | * | |
791 | * Wait for command done. This applies to erase and program only | |
ac7eb8a3 | 792 | * Erase can take up to 400ms and program up to 20ms according to |
932394ac WD |
793 | * general NAND and SmartMedia specs |
794 | * | |
795 | */ | |
796 | /* XXX U-BOOT XXX */ | |
797 | #if 0 | |
798 | static int nand_wait(struct mtd_info *mtd, struct nand_chip *this, int state) | |
799 | { | |
800 | unsigned long timeo = jiffies; | |
801 | int status; | |
ac7eb8a3 | 802 | |
932394ac WD |
803 | if (state == FL_ERASING) |
804 | timeo += (HZ * 400) / 1000; | |
805 | else | |
806 | timeo += (HZ * 20) / 1000; | |
807 | ||
808 | /* Apply this short delay always to ensure that we do wait tWB in | |
809 | * any case on any machine. */ | |
810 | ndelay (100); | |
811 | ||
812 | if ((state == FL_ERASING) && (this->options & NAND_IS_AND)) | |
813 | this->cmdfunc (mtd, NAND_CMD_STATUS_MULTI, -1, -1); | |
ac7eb8a3 | 814 | else |
932394ac WD |
815 | this->cmdfunc (mtd, NAND_CMD_STATUS, -1, -1); |
816 | ||
ac7eb8a3 | 817 | while (time_before(jiffies, timeo)) { |
932394ac WD |
818 | /* Check, if we were interrupted */ |
819 | if (this->state != state) | |
820 | return 0; | |
821 | ||
822 | if (this->dev_ready) { | |
823 | if (this->dev_ready(mtd)) | |
ac7eb8a3 | 824 | break; |
932394ac WD |
825 | } else { |
826 | if (this->read_byte(mtd) & NAND_STATUS_READY) | |
827 | break; | |
828 | } | |
829 | yield (); | |
830 | } | |
831 | status = (int) this->read_byte(mtd); | |
832 | return status; | |
833 | ||
834 | return 0; | |
835 | } | |
836 | #else | |
837 | static int nand_wait(struct mtd_info *mtd, struct nand_chip *this, int state) | |
838 | { | |
8e9655f8 WD |
839 | unsigned long timeo; |
840 | ||
841 | if (state == FL_ERASING) | |
842 | timeo = CFG_HZ * 400; | |
843 | else | |
844 | timeo = CFG_HZ * 20; | |
845 | ||
846 | if ((state == FL_ERASING) && (this->options & NAND_IS_AND)) | |
847 | this->cmdfunc(mtd, NAND_CMD_STATUS_MULTI, -1, -1); | |
848 | else | |
849 | this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); | |
850 | ||
038ccac5 | 851 | reset_timer(); |
8e9655f8 WD |
852 | |
853 | while (1) { | |
038ccac5 BS |
854 | if (get_timer(0) > timeo) { |
855 | printf("Timeout!"); | |
8e9655f8 | 856 | return 0; |
038ccac5 | 857 | } |
8e9655f8 WD |
858 | |
859 | if (this->dev_ready) { | |
860 | if (this->dev_ready(mtd)) | |
861 | break; | |
862 | } else { | |
863 | if (this->read_byte(mtd) & NAND_STATUS_READY) | |
864 | break; | |
865 | } | |
866 | } | |
867 | ||
038ccac5 BS |
868 | /* XXX nand device 1 on dave (PPChameleonEVB) needs more time */ |
869 | reset_timer(); | |
870 | while (get_timer(0) < 10); | |
871 | ||
8e9655f8 | 872 | return this->read_byte(mtd); |
932394ac WD |
873 | } |
874 | #endif | |
875 | ||
876 | /** | |
877 | * nand_write_page - [GENERIC] write one page | |
878 | * @mtd: MTD device structure | |
879 | * @this: NAND chip structure | |
880 | * @page: startpage inside the chip, must be called with (page & this->pagemask) | |
881 | * @oob_buf: out of band data buffer | |
882 | * @oobsel: out of band selecttion structre | |
883 | * @cached: 1 = enable cached programming if supported by chip | |
884 | * | |
885 | * Nand_page_program function is used for write and writev ! | |
886 | * This function will always program a full page of data | |
887 | * If you call it with a non page aligned buffer, you're lost :) | |
888 | * | |
889 | * Cached programming is not supported yet. | |
890 | */ | |
ac7eb8a3 | 891 | static int nand_write_page (struct mtd_info *mtd, struct nand_chip *this, int page, |
932394ac WD |
892 | u_char *oob_buf, struct nand_oobinfo *oobsel, int cached) |
893 | { | |
894 | int i, status; | |
895 | u_char ecc_code[32]; | |
896 | int eccmode = oobsel->useecc ? this->eccmode : NAND_ECC_NONE; | |
897 | int *oob_config = oobsel->eccpos; | |
898 | int datidx = 0, eccidx = 0, eccsteps = this->eccsteps; | |
899 | int eccbytes = 0; | |
ac7eb8a3 | 900 | |
932394ac WD |
901 | /* FIXME: Enable cached programming */ |
902 | cached = 0; | |
ac7eb8a3 | 903 | |
932394ac WD |
904 | /* Send command to begin auto page programming */ |
905 | this->cmdfunc (mtd, NAND_CMD_SEQIN, 0x00, page); | |
906 | ||
907 | /* Write out complete page of data, take care of eccmode */ | |
908 | switch (eccmode) { | |
909 | /* No ecc, write all */ | |
910 | case NAND_ECC_NONE: | |
911 | printk (KERN_WARNING "Writing data without ECC to NAND-FLASH is not recommended\n"); | |
912 | this->write_buf(mtd, this->data_poi, mtd->oobblock); | |
913 | break; | |
ac7eb8a3 | 914 | |
932394ac WD |
915 | /* Software ecc 3/256, write all */ |
916 | case NAND_ECC_SOFT: | |
917 | for (; eccsteps; eccsteps--) { | |
918 | this->calculate_ecc(mtd, &this->data_poi[datidx], ecc_code); | |
919 | for (i = 0; i < 3; i++, eccidx++) | |
920 | oob_buf[oob_config[eccidx]] = ecc_code[i]; | |
921 | datidx += this->eccsize; | |
922 | } | |
923 | this->write_buf(mtd, this->data_poi, mtd->oobblock); | |
924 | break; | |
925 | default: | |
926 | eccbytes = this->eccbytes; | |
927 | for (; eccsteps; eccsteps--) { | |
928 | /* enable hardware ecc logic for write */ | |
929 | this->enable_hwecc(mtd, NAND_ECC_WRITE); | |
930 | this->write_buf(mtd, &this->data_poi[datidx], this->eccsize); | |
931 | this->calculate_ecc(mtd, &this->data_poi[datidx], ecc_code); | |
932 | for (i = 0; i < eccbytes; i++, eccidx++) | |
933 | oob_buf[oob_config[eccidx]] = ecc_code[i]; | |
934 | /* If the hardware ecc provides syndromes then | |
935 | * the ecc code must be written immidiately after | |
936 | * the data bytes (words) */ | |
937 | if (this->options & NAND_HWECC_SYNDROME) | |
938 | this->write_buf(mtd, ecc_code, eccbytes); | |
939 | datidx += this->eccsize; | |
940 | } | |
941 | break; | |
942 | } | |
ac7eb8a3 | 943 | |
932394ac WD |
944 | /* Write out OOB data */ |
945 | if (this->options & NAND_HWECC_SYNDROME) | |
946 | this->write_buf(mtd, &oob_buf[oobsel->eccbytes], mtd->oobsize - oobsel->eccbytes); | |
ac7eb8a3 | 947 | else |
932394ac WD |
948 | this->write_buf(mtd, oob_buf, mtd->oobsize); |
949 | ||
950 | /* Send command to actually program the data */ | |
951 | this->cmdfunc (mtd, cached ? NAND_CMD_CACHEDPROG : NAND_CMD_PAGEPROG, -1, -1); | |
952 | ||
953 | if (!cached) { | |
954 | /* call wait ready function */ | |
955 | status = this->waitfunc (mtd, this, FL_WRITING); | |
956 | /* See if device thinks it succeeded */ | |
957 | if (status & 0x01) { | |
958 | DEBUG (MTD_DEBUG_LEVEL0, "%s: " "Failed write, page 0x%08x, ", __FUNCTION__, page); | |
959 | return -EIO; | |
960 | } | |
961 | } else { | |
962 | /* FIXME: Implement cached programming ! */ | |
963 | /* wait until cache is ready*/ | |
ac7eb8a3 | 964 | /* status = this->waitfunc (mtd, this, FL_CACHEDRPG); */ |
932394ac | 965 | } |
ac7eb8a3 | 966 | return 0; |
932394ac WD |
967 | } |
968 | ||
969 | #ifdef CONFIG_MTD_NAND_VERIFY_WRITE | |
970 | /** | |
971 | * nand_verify_pages - [GENERIC] verify the chip contents after a write | |
972 | * @mtd: MTD device structure | |
973 | * @this: NAND chip structure | |
974 | * @page: startpage inside the chip, must be called with (page & this->pagemask) | |
975 | * @numpages: number of pages to verify | |
976 | * @oob_buf: out of band data buffer | |
977 | * @oobsel: out of band selecttion structre | |
978 | * @chipnr: number of the current chip | |
979 | * @oobmode: 1 = full buffer verify, 0 = ecc only | |
980 | * | |
981 | * The NAND device assumes that it is always writing to a cleanly erased page. | |
ac7eb8a3 | 982 | * Hence, it performs its internal write verification only on bits that |
932394ac | 983 | * transitioned from 1 to 0. The device does NOT verify the whole page on a |
ac7eb8a3 WD |
984 | * byte by byte basis. It is possible that the page was not completely erased |
985 | * or the page is becoming unusable due to wear. The read with ECC would catch | |
986 | * the error later when the ECC page check fails, but we would rather catch | |
932394ac WD |
987 | * it early in the page write stage. Better to write no data than invalid data. |
988 | */ | |
ac7eb8a3 | 989 | static int nand_verify_pages (struct mtd_info *mtd, struct nand_chip *this, int page, int numpages, |
932394ac WD |
990 | u_char *oob_buf, struct nand_oobinfo *oobsel, int chipnr, int oobmode) |
991 | { | |
992 | int i, j, datidx = 0, oobofs = 0, res = -EIO; | |
993 | int eccsteps = this->eccsteps; | |
ac7eb8a3 | 994 | int hweccbytes; |
932394ac WD |
995 | u_char oobdata[64]; |
996 | ||
997 | hweccbytes = (this->options & NAND_HWECC_SYNDROME) ? (oobsel->eccbytes / eccsteps) : 0; | |
998 | ||
999 | /* Send command to read back the first page */ | |
1000 | this->cmdfunc (mtd, NAND_CMD_READ0, 0, page); | |
1001 | ||
1002 | for(;;) { | |
1003 | for (j = 0; j < eccsteps; j++) { | |
1004 | /* Loop through and verify the data */ | |
1005 | if (this->verify_buf(mtd, &this->data_poi[datidx], mtd->eccsize)) { | |
1006 | DEBUG (MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page); | |
1007 | goto out; | |
1008 | } | |
1009 | datidx += mtd->eccsize; | |
1010 | /* Have we a hw generator layout ? */ | |
1011 | if (!hweccbytes) | |
1012 | continue; | |
1013 | if (this->verify_buf(mtd, &this->oob_buf[oobofs], hweccbytes)) { | |
1014 | DEBUG (MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page); | |
1015 | goto out; | |
1016 | } | |
1017 | oobofs += hweccbytes; | |
1018 | } | |
1019 | ||
1020 | /* check, if we must compare all data or if we just have to | |
1021 | * compare the ecc bytes | |
1022 | */ | |
1023 | if (oobmode) { | |
1024 | if (this->verify_buf(mtd, &oob_buf[oobofs], mtd->oobsize - hweccbytes * eccsteps)) { | |
1025 | DEBUG (MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page); | |
1026 | goto out; | |
1027 | } | |
1028 | } else { | |
1029 | /* Read always, else autoincrement fails */ | |
1030 | this->read_buf(mtd, oobdata, mtd->oobsize - hweccbytes * eccsteps); | |
1031 | ||
1032 | if (oobsel->useecc != MTD_NANDECC_OFF && !hweccbytes) { | |
1033 | int ecccnt = oobsel->eccbytes; | |
ac7eb8a3 | 1034 | |
932394ac WD |
1035 | for (i = 0; i < ecccnt; i++) { |
1036 | int idx = oobsel->eccpos[i]; | |
1037 | if (oobdata[idx] != oob_buf[oobofs + idx] ) { | |
1038 | DEBUG (MTD_DEBUG_LEVEL0, | |
1039 | "%s: Failed ECC write " | |
1040 | "verify, page 0x%08x, " "%6i bytes were succesful\n", __FUNCTION__, page, i); | |
1041 | goto out; | |
1042 | } | |
1043 | } | |
ac7eb8a3 | 1044 | } |
932394ac WD |
1045 | } |
1046 | oobofs += mtd->oobsize - hweccbytes * eccsteps; | |
1047 | page++; | |
1048 | numpages--; | |
1049 | ||
ac7eb8a3 | 1050 | /* Apply delay or wait for ready/busy pin |
932394ac WD |
1051 | * Do this before the AUTOINCR check, so no problems |
1052 | * arise if a chip which does auto increment | |
1053 | * is marked as NOAUTOINCR by the board driver. | |
1054 | * Do this also before returning, so the chip is | |
1055 | * ready for the next command. | |
1056 | */ | |
ac7eb8a3 | 1057 | if (!this->dev_ready) |
932394ac WD |
1058 | udelay (this->chip_delay); |
1059 | else | |
ac7eb8a3 | 1060 | while (!this->dev_ready(mtd)); |
932394ac WD |
1061 | |
1062 | /* All done, return happy */ | |
1063 | if (!numpages) | |
1064 | return 0; | |
ac7eb8a3 WD |
1065 | |
1066 | ||
1067 | /* Check, if the chip supports auto page increment */ | |
932394ac WD |
1068 | if (!NAND_CANAUTOINCR(this)) |
1069 | this->cmdfunc (mtd, NAND_CMD_READ0, 0x00, page); | |
1070 | } | |
ac7eb8a3 | 1071 | /* |
932394ac WD |
1072 | * Terminate the read command. We come here in case of an error |
1073 | * So we must issue a reset command. | |
1074 | */ | |
ac7eb8a3 | 1075 | out: |
932394ac WD |
1076 | this->cmdfunc (mtd, NAND_CMD_RESET, -1, -1); |
1077 | return res; | |
1078 | } | |
1079 | #endif | |
1080 | ||
1081 | /** | |
1082 | * nand_read - [MTD Interface] MTD compability function for nand_read_ecc | |
1083 | * @mtd: MTD device structure | |
1084 | * @from: offset to read from | |
1085 | * @len: number of bytes to read | |
1086 | * @retlen: pointer to variable to store the number of read bytes | |
1087 | * @buf: the databuffer to put data | |
1088 | * | |
1089 | * This function simply calls nand_read_ecc with oob buffer and oobsel = NULL | |
1090 | */ | |
1091 | static int nand_read (struct mtd_info *mtd, loff_t from, size_t len, size_t * retlen, u_char * buf) | |
1092 | { | |
1093 | return nand_read_ecc (mtd, from, len, retlen, buf, NULL, NULL); | |
ac7eb8a3 | 1094 | } |
932394ac WD |
1095 | |
1096 | ||
1097 | /** | |
1098 | * nand_read_ecc - [MTD Interface] Read data with ECC | |
1099 | * @mtd: MTD device structure | |
1100 | * @from: offset to read from | |
1101 | * @len: number of bytes to read | |
1102 | * @retlen: pointer to variable to store the number of read bytes | |
1103 | * @buf: the databuffer to put data | |
1104 | * @oob_buf: filesystem supplied oob data buffer | |
1105 | * @oobsel: oob selection structure | |
1106 | * | |
1107 | * NAND read with ECC | |
1108 | */ | |
1109 | static int nand_read_ecc (struct mtd_info *mtd, loff_t from, size_t len, | |
1110 | size_t * retlen, u_char * buf, u_char * oob_buf, struct nand_oobinfo *oobsel) | |
1111 | { | |
1112 | int i, j, col, realpage, page, end, ecc, chipnr, sndcmd = 1; | |
1113 | int read = 0, oob = 0, ecc_status = 0, ecc_failed = 0; | |
1114 | struct nand_chip *this = mtd->priv; | |
1115 | u_char *data_poi, *oob_data = oob_buf; | |
1116 | u_char ecc_calc[32]; | |
1117 | u_char ecc_code[32]; | |
ac7eb8a3 | 1118 | int eccmode, eccsteps; |
932394ac WD |
1119 | int *oob_config, datidx; |
1120 | int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1; | |
1121 | int eccbytes; | |
1122 | int compareecc = 1; | |
1123 | int oobreadlen; | |
1124 | ||
1125 | ||
1126 | DEBUG (MTD_DEBUG_LEVEL3, "nand_read_ecc: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len); | |
1127 | ||
1128 | /* Do not allow reads past end of device */ | |
1129 | if ((from + len) > mtd->size) { | |
1130 | DEBUG (MTD_DEBUG_LEVEL0, "nand_read_ecc: Attempt read beyond end of device\n"); | |
1131 | *retlen = 0; | |
1132 | return -EINVAL; | |
1133 | } | |
1134 | ||
1135 | /* Grab the lock and see if the device is available */ | |
1136 | nand_get_device (this, mtd ,FL_READING); | |
1137 | ||
1138 | /* use userspace supplied oobinfo, if zero */ | |
1139 | if (oobsel == NULL) | |
1140 | oobsel = &mtd->oobinfo; | |
ac7eb8a3 | 1141 | |
932394ac WD |
1142 | /* Autoplace of oob data ? Use the default placement scheme */ |
1143 | if (oobsel->useecc == MTD_NANDECC_AUTOPLACE) | |
1144 | oobsel = this->autooob; | |
ac7eb8a3 | 1145 | |
932394ac WD |
1146 | eccmode = oobsel->useecc ? this->eccmode : NAND_ECC_NONE; |
1147 | oob_config = oobsel->eccpos; | |
1148 | ||
1149 | /* Select the NAND device */ | |
1150 | chipnr = (int)(from >> this->chip_shift); | |
1151 | this->select_chip(mtd, chipnr); | |
1152 | ||
1153 | /* First we calculate the starting page */ | |
1154 | realpage = (int) (from >> this->page_shift); | |
1155 | page = realpage & this->pagemask; | |
1156 | ||
1157 | /* Get raw starting column */ | |
1158 | col = from & (mtd->oobblock - 1); | |
1159 | ||
1160 | end = mtd->oobblock; | |
1161 | ecc = this->eccsize; | |
1162 | eccbytes = this->eccbytes; | |
ac7eb8a3 | 1163 | |
932394ac WD |
1164 | if ((eccmode == NAND_ECC_NONE) || (this->options & NAND_HWECC_SYNDROME)) |
1165 | compareecc = 0; | |
1166 | ||
1167 | oobreadlen = mtd->oobsize; | |
ac7eb8a3 | 1168 | if (this->options & NAND_HWECC_SYNDROME) |
932394ac WD |
1169 | oobreadlen -= oobsel->eccbytes; |
1170 | ||
1171 | /* Loop until all data read */ | |
1172 | while (read < len) { | |
ac7eb8a3 | 1173 | |
932394ac | 1174 | int aligned = (!col && (len - read) >= end); |
ac7eb8a3 | 1175 | /* |
932394ac WD |
1176 | * If the read is not page aligned, we have to read into data buffer |
1177 | * due to ecc, else we read into return buffer direct | |
1178 | */ | |
1179 | if (aligned) | |
1180 | data_poi = &buf[read]; | |
ac7eb8a3 | 1181 | else |
932394ac | 1182 | data_poi = this->data_buf; |
ac7eb8a3 WD |
1183 | |
1184 | /* Check, if we have this page in the buffer | |
932394ac WD |
1185 | * |
1186 | * FIXME: Make it work when we must provide oob data too, | |
1187 | * check the usage of data_buf oob field | |
1188 | */ | |
1189 | if (realpage == this->pagebuf && !oob_buf) { | |
1190 | /* aligned read ? */ | |
1191 | if (aligned) | |
1192 | memcpy (data_poi, this->data_buf, end); | |
1193 | goto readdata; | |
1194 | } | |
1195 | ||
1196 | /* Check, if we must send the read command */ | |
1197 | if (sndcmd) { | |
1198 | this->cmdfunc (mtd, NAND_CMD_READ0, 0x00, page); | |
1199 | sndcmd = 0; | |
ac7eb8a3 | 1200 | } |
932394ac WD |
1201 | |
1202 | /* get oob area, if we have no oob buffer from fs-driver */ | |
1203 | if (!oob_buf || oobsel->useecc == MTD_NANDECC_AUTOPLACE || | |
1204 | oobsel->useecc == MTD_NANDECC_AUTOPL_USR) | |
1205 | oob_data = &this->data_buf[end]; | |
1206 | ||
1207 | eccsteps = this->eccsteps; | |
ac7eb8a3 | 1208 | |
932394ac WD |
1209 | switch (eccmode) { |
1210 | case NAND_ECC_NONE: { /* No ECC, Read in a page */ | |
1211 | /* XXX U-BOOT XXX */ | |
1212 | #if 0 | |
1213 | static unsigned long lastwhinge = 0; | |
1214 | if ((lastwhinge / HZ) != (jiffies / HZ)) { | |
1215 | printk (KERN_WARNING "Reading data from NAND FLASH without ECC is not recommended\n"); | |
1216 | lastwhinge = jiffies; | |
1217 | } | |
1218 | #else | |
1219 | puts("Reading data from NAND FLASH without ECC is not recommended\n"); | |
1220 | #endif | |
1221 | this->read_buf(mtd, data_poi, end); | |
1222 | break; | |
1223 | } | |
ac7eb8a3 | 1224 | |
932394ac WD |
1225 | case NAND_ECC_SOFT: /* Software ECC 3/256: Read in a page + oob data */ |
1226 | this->read_buf(mtd, data_poi, end); | |
ac7eb8a3 | 1227 | for (i = 0, datidx = 0; eccsteps; eccsteps--, i+=3, datidx += ecc) |
932394ac | 1228 | this->calculate_ecc(mtd, &data_poi[datidx], &ecc_calc[i]); |
ac7eb8a3 | 1229 | break; |
932394ac WD |
1230 | |
1231 | default: | |
1232 | for (i = 0, datidx = 0; eccsteps; eccsteps--, i+=eccbytes, datidx += ecc) { | |
1233 | this->enable_hwecc(mtd, NAND_ECC_READ); | |
1234 | this->read_buf(mtd, &data_poi[datidx], ecc); | |
1235 | ||
1236 | /* HW ecc with syndrome calculation must read the | |
1237 | * syndrome from flash immidiately after the data */ | |
1238 | if (!compareecc) { | |
1239 | /* Some hw ecc generators need to know when the | |
1240 | * syndrome is read from flash */ | |
1241 | this->enable_hwecc(mtd, NAND_ECC_READSYN); | |
1242 | this->read_buf(mtd, &oob_data[i], eccbytes); | |
1243 | /* We calc error correction directly, it checks the hw | |
1244 | * generator for an error, reads back the syndrome and | |
1245 | * does the error correction on the fly */ | |
1246 | if (this->correct_data(mtd, &data_poi[datidx], &oob_data[i], &ecc_code[i]) == -1) { | |
ac7eb8a3 | 1247 | DEBUG (MTD_DEBUG_LEVEL0, "nand_read_ecc: " |
932394ac WD |
1248 | "Failed ECC read, page 0x%08x on chip %d\n", page, chipnr); |
1249 | ecc_failed++; | |
1250 | } | |
1251 | } else { | |
1252 | this->calculate_ecc(mtd, &data_poi[datidx], &ecc_calc[i]); | |
ac7eb8a3 | 1253 | } |
932394ac | 1254 | } |
ac7eb8a3 | 1255 | break; |
932394ac WD |
1256 | } |
1257 | ||
1258 | /* read oobdata */ | |
1259 | this->read_buf(mtd, &oob_data[mtd->oobsize - oobreadlen], oobreadlen); | |
1260 | ||
1261 | /* Skip ECC check, if not requested (ECC_NONE or HW_ECC with syndromes) */ | |
1262 | if (!compareecc) | |
ac7eb8a3 WD |
1263 | goto readoob; |
1264 | ||
932394ac WD |
1265 | /* Pick the ECC bytes out of the oob data */ |
1266 | for (j = 0; j < oobsel->eccbytes; j++) | |
1267 | ecc_code[j] = oob_data[oob_config[j]]; | |
1268 | ||
1269 | /* correct data, if neccecary */ | |
1270 | for (i = 0, j = 0, datidx = 0; i < this->eccsteps; i++, datidx += ecc) { | |
1271 | ecc_status = this->correct_data(mtd, &data_poi[datidx], &ecc_code[j], &ecc_calc[j]); | |
ac7eb8a3 | 1272 | |
932394ac WD |
1273 | /* Get next chunk of ecc bytes */ |
1274 | j += eccbytes; | |
ac7eb8a3 WD |
1275 | |
1276 | /* Check, if we have a fs supplied oob-buffer, | |
932394ac WD |
1277 | * This is the legacy mode. Used by YAFFS1 |
1278 | * Should go away some day | |
1279 | */ | |
ac7eb8a3 | 1280 | if (oob_buf && oobsel->useecc == MTD_NANDECC_PLACE) { |
932394ac WD |
1281 | int *p = (int *)(&oob_data[mtd->oobsize]); |
1282 | p[i] = ecc_status; | |
1283 | } | |
ac7eb8a3 WD |
1284 | |
1285 | if (ecc_status == -1) { | |
932394ac WD |
1286 | DEBUG (MTD_DEBUG_LEVEL0, "nand_read_ecc: " "Failed ECC read, page 0x%08x\n", page); |
1287 | ecc_failed++; | |
1288 | } | |
ac7eb8a3 | 1289 | } |
932394ac WD |
1290 | |
1291 | readoob: | |
1292 | /* check, if we have a fs supplied oob-buffer */ | |
1293 | if (oob_buf) { | |
1294 | /* without autoplace. Legacy mode used by YAFFS1 */ | |
1295 | switch(oobsel->useecc) { | |
1296 | case MTD_NANDECC_AUTOPLACE: | |
1297 | case MTD_NANDECC_AUTOPL_USR: | |
1298 | /* Walk through the autoplace chunks */ | |
1299 | for (i = 0, j = 0; j < mtd->oobavail; i++) { | |
1300 | int from = oobsel->oobfree[i][0]; | |
1301 | int num = oobsel->oobfree[i][1]; | |
1302 | memcpy(&oob_buf[oob], &oob_data[from], num); | |
1303 | j+= num; | |
1304 | } | |
1305 | oob += mtd->oobavail; | |
1306 | break; | |
1307 | case MTD_NANDECC_PLACE: | |
1308 | /* YAFFS1 legacy mode */ | |
1309 | oob_data += this->eccsteps * sizeof (int); | |
1310 | default: | |
1311 | oob_data += mtd->oobsize; | |
1312 | } | |
1313 | } | |
1314 | readdata: | |
1315 | /* Partial page read, transfer data into fs buffer */ | |
ac7eb8a3 | 1316 | if (!aligned) { |
932394ac WD |
1317 | for (j = col; j < end && read < len; j++) |
1318 | buf[read++] = data_poi[j]; | |
ac7eb8a3 WD |
1319 | this->pagebuf = realpage; |
1320 | } else | |
932394ac WD |
1321 | read += mtd->oobblock; |
1322 | ||
ac7eb8a3 | 1323 | /* Apply delay or wait for ready/busy pin |
932394ac WD |
1324 | * Do this before the AUTOINCR check, so no problems |
1325 | * arise if a chip which does auto increment | |
1326 | * is marked as NOAUTOINCR by the board driver. | |
1327 | */ | |
ac7eb8a3 | 1328 | if (!this->dev_ready) |
932394ac WD |
1329 | udelay (this->chip_delay); |
1330 | else | |
ac7eb8a3 WD |
1331 | while (!this->dev_ready(mtd)); |
1332 | ||
932394ac | 1333 | if (read == len) |
ac7eb8a3 | 1334 | break; |
932394ac WD |
1335 | |
1336 | /* For subsequent reads align to page boundary. */ | |
1337 | col = 0; | |
1338 | /* Increment page address */ | |
1339 | realpage++; | |
1340 | ||
1341 | page = realpage & this->pagemask; | |
1342 | /* Check, if we cross a chip boundary */ | |
1343 | if (!page) { | |
1344 | chipnr++; | |
1345 | this->select_chip(mtd, -1); | |
1346 | this->select_chip(mtd, chipnr); | |
1347 | } | |
ac7eb8a3 WD |
1348 | /* Check, if the chip supports auto page increment |
1349 | * or if we have hit a block boundary. | |
1350 | */ | |
932394ac | 1351 | if (!NAND_CANAUTOINCR(this) || !(page & blockcheck)) |
ac7eb8a3 | 1352 | sndcmd = 1; |
932394ac WD |
1353 | } |
1354 | ||
1355 | /* Deselect and wake up anyone waiting on the device */ | |
1356 | nand_release_device(mtd); | |
1357 | ||
1358 | /* | |
1359 | * Return success, if no ECC failures, else -EBADMSG | |
1360 | * fs driver will take care of that, because | |
1361 | * retlen == desired len and result == -EBADMSG | |
1362 | */ | |
1363 | *retlen = read; | |
1364 | return ecc_failed ? -EBADMSG : 0; | |
1365 | } | |
1366 | ||
1367 | /** | |
1368 | * nand_read_oob - [MTD Interface] NAND read out-of-band | |
1369 | * @mtd: MTD device structure | |
1370 | * @from: offset to read from | |
1371 | * @len: number of bytes to read | |
1372 | * @retlen: pointer to variable to store the number of read bytes | |
1373 | * @buf: the databuffer to put data | |
1374 | * | |
1375 | * NAND read out-of-band data from the spare area | |
1376 | */ | |
1377 | static int nand_read_oob (struct mtd_info *mtd, loff_t from, size_t len, size_t * retlen, u_char * buf) | |
1378 | { | |
1379 | int i, col, page, chipnr; | |
1380 | struct nand_chip *this = mtd->priv; | |
1381 | int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1; | |
1382 | ||
1383 | DEBUG (MTD_DEBUG_LEVEL3, "nand_read_oob: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len); | |
1384 | ||
1385 | /* Shift to get page */ | |
1386 | page = (int)(from >> this->page_shift); | |
1387 | chipnr = (int)(from >> this->chip_shift); | |
ac7eb8a3 | 1388 | |
932394ac WD |
1389 | /* Mask to get column */ |
1390 | col = from & (mtd->oobsize - 1); | |
1391 | ||
1392 | /* Initialize return length value */ | |
1393 | *retlen = 0; | |
1394 | ||
1395 | /* Do not allow reads past end of device */ | |
1396 | if ((from + len) > mtd->size) { | |
1397 | DEBUG (MTD_DEBUG_LEVEL0, "nand_read_oob: Attempt read beyond end of device\n"); | |
1398 | *retlen = 0; | |
1399 | return -EINVAL; | |
1400 | } | |
1401 | ||
1402 | /* Grab the lock and see if the device is available */ | |
1403 | nand_get_device (this, mtd , FL_READING); | |
1404 | ||
1405 | /* Select the NAND device */ | |
1406 | this->select_chip(mtd, chipnr); | |
1407 | ||
1408 | /* Send the read command */ | |
1409 | this->cmdfunc (mtd, NAND_CMD_READOOB, col, page & this->pagemask); | |
ac7eb8a3 | 1410 | /* |
932394ac WD |
1411 | * Read the data, if we read more than one page |
1412 | * oob data, let the device transfer the data ! | |
1413 | */ | |
1414 | i = 0; | |
1415 | while (i < len) { | |
1416 | int thislen = mtd->oobsize - col; | |
1417 | thislen = min_t(int, thislen, len); | |
1418 | this->read_buf(mtd, &buf[i], thislen); | |
1419 | i += thislen; | |
ac7eb8a3 WD |
1420 | |
1421 | /* Apply delay or wait for ready/busy pin | |
932394ac WD |
1422 | * Do this before the AUTOINCR check, so no problems |
1423 | * arise if a chip which does auto increment | |
1424 | * is marked as NOAUTOINCR by the board driver. | |
1425 | */ | |
ac7eb8a3 | 1426 | if (!this->dev_ready) |
932394ac WD |
1427 | udelay (this->chip_delay); |
1428 | else | |
ac7eb8a3 | 1429 | while (!this->dev_ready(mtd)); |
932394ac WD |
1430 | |
1431 | /* Read more ? */ | |
1432 | if (i < len) { | |
1433 | page++; | |
1434 | col = 0; | |
1435 | ||
1436 | /* Check, if we cross a chip boundary */ | |
1437 | if (!(page & this->pagemask)) { | |
1438 | chipnr++; | |
1439 | this->select_chip(mtd, -1); | |
1440 | this->select_chip(mtd, chipnr); | |
1441 | } | |
ac7eb8a3 WD |
1442 | |
1443 | /* Check, if the chip supports auto page increment | |
1444 | * or if we have hit a block boundary. | |
1445 | */ | |
932394ac WD |
1446 | if (!NAND_CANAUTOINCR(this) || !(page & blockcheck)) { |
1447 | /* For subsequent page reads set offset to 0 */ | |
ac7eb8a3 | 1448 | this->cmdfunc (mtd, NAND_CMD_READOOB, 0x0, page & this->pagemask); |
932394ac WD |
1449 | } |
1450 | } | |
1451 | } | |
1452 | ||
1453 | /* Deselect and wake up anyone waiting on the device */ | |
1454 | nand_release_device(mtd); | |
1455 | ||
1456 | /* Return happy */ | |
1457 | *retlen = len; | |
1458 | return 0; | |
1459 | } | |
1460 | ||
1461 | /** | |
1462 | * nand_read_raw - [GENERIC] Read raw data including oob into buffer | |
1463 | * @mtd: MTD device structure | |
1464 | * @buf: temporary buffer | |
1465 | * @from: offset to read from | |
1466 | * @len: number of bytes to read | |
1467 | * @ooblen: number of oob data bytes to read | |
1468 | * | |
1469 | * Read raw data including oob into buffer | |
1470 | */ | |
1471 | int nand_read_raw (struct mtd_info *mtd, uint8_t *buf, loff_t from, size_t len, size_t ooblen) | |
1472 | { | |
1473 | struct nand_chip *this = mtd->priv; | |
1474 | int page = (int) (from >> this->page_shift); | |
1475 | int chip = (int) (from >> this->chip_shift); | |
1476 | int sndcmd = 1; | |
1477 | int cnt = 0; | |
1478 | int pagesize = mtd->oobblock + mtd->oobsize; | |
1479 | int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1; | |
1480 | ||
1481 | /* Do not allow reads past end of device */ | |
1482 | if ((from + len) > mtd->size) { | |
1483 | DEBUG (MTD_DEBUG_LEVEL0, "nand_read_raw: Attempt read beyond end of device\n"); | |
1484 | return -EINVAL; | |
1485 | } | |
1486 | ||
1487 | /* Grab the lock and see if the device is available */ | |
1488 | nand_get_device (this, mtd , FL_READING); | |
1489 | ||
1490 | this->select_chip (mtd, chip); | |
ac7eb8a3 | 1491 | |
932394ac WD |
1492 | /* Add requested oob length */ |
1493 | len += ooblen; | |
ac7eb8a3 | 1494 | |
932394ac WD |
1495 | while (len) { |
1496 | if (sndcmd) | |
1497 | this->cmdfunc (mtd, NAND_CMD_READ0, 0, page & this->pagemask); | |
ac7eb8a3 | 1498 | sndcmd = 0; |
932394ac WD |
1499 | |
1500 | this->read_buf (mtd, &buf[cnt], pagesize); | |
1501 | ||
1502 | len -= pagesize; | |
1503 | cnt += pagesize; | |
1504 | page++; | |
ac7eb8a3 WD |
1505 | |
1506 | if (!this->dev_ready) | |
932394ac WD |
1507 | udelay (this->chip_delay); |
1508 | else | |
ac7eb8a3 WD |
1509 | while (!this->dev_ready(mtd)); |
1510 | ||
1511 | /* Check, if the chip supports auto page increment */ | |
932394ac WD |
1512 | if (!NAND_CANAUTOINCR(this) || !(page & blockcheck)) |
1513 | sndcmd = 1; | |
1514 | } | |
1515 | ||
1516 | /* Deselect and wake up anyone waiting on the device */ | |
1517 | nand_release_device(mtd); | |
1518 | return 0; | |
1519 | } | |
1520 | ||
1521 | ||
ac7eb8a3 WD |
1522 | /** |
1523 | * nand_prepare_oobbuf - [GENERIC] Prepare the out of band buffer | |
932394ac WD |
1524 | * @mtd: MTD device structure |
1525 | * @fsbuf: buffer given by fs driver | |
1526 | * @oobsel: out of band selection structre | |
1527 | * @autoplace: 1 = place given buffer into the oob bytes | |
1528 | * @numpages: number of pages to prepare | |
1529 | * | |
1530 | * Return: | |
1531 | * 1. Filesystem buffer available and autoplacement is off, | |
1532 | * return filesystem buffer | |
1533 | * 2. No filesystem buffer or autoplace is off, return internal | |
1534 | * buffer | |
1535 | * 3. Filesystem buffer is given and autoplace selected | |
1536 | * put data from fs buffer into internal buffer and | |
1537 | * retrun internal buffer | |
1538 | * | |
1539 | * Note: The internal buffer is filled with 0xff. This must | |
1540 | * be done only once, when no autoplacement happens | |
1541 | * Autoplacement sets the buffer dirty flag, which | |
1542 | * forces the 0xff fill before using the buffer again. | |
1543 | * | |
1544 | */ | |
1545 | static u_char * nand_prepare_oobbuf (struct mtd_info *mtd, u_char *fsbuf, struct nand_oobinfo *oobsel, | |
1546 | int autoplace, int numpages) | |
1547 | { | |
1548 | struct nand_chip *this = mtd->priv; | |
1549 | int i, len, ofs; | |
1550 | ||
1551 | /* Zero copy fs supplied buffer */ | |
ac7eb8a3 | 1552 | if (fsbuf && !autoplace) |
932394ac WD |
1553 | return fsbuf; |
1554 | ||
1555 | /* Check, if the buffer must be filled with ff again */ | |
ac7eb8a3 WD |
1556 | if (this->oobdirty) { |
1557 | memset (this->oob_buf, 0xff, | |
932394ac WD |
1558 | mtd->oobsize << (this->phys_erase_shift - this->page_shift)); |
1559 | this->oobdirty = 0; | |
ac7eb8a3 WD |
1560 | } |
1561 | ||
932394ac WD |
1562 | /* If we have no autoplacement or no fs buffer use the internal one */ |
1563 | if (!autoplace || !fsbuf) | |
1564 | return this->oob_buf; | |
ac7eb8a3 | 1565 | |
932394ac WD |
1566 | /* Walk through the pages and place the data */ |
1567 | this->oobdirty = 1; | |
1568 | ofs = 0; | |
1569 | while (numpages--) { | |
1570 | for (i = 0, len = 0; len < mtd->oobavail; i++) { | |
1571 | int to = ofs + oobsel->oobfree[i][0]; | |
1572 | int num = oobsel->oobfree[i][1]; | |
1573 | memcpy (&this->oob_buf[to], fsbuf, num); | |
1574 | len += num; | |
1575 | fsbuf += num; | |
1576 | } | |
1577 | ofs += mtd->oobavail; | |
1578 | } | |
1579 | return this->oob_buf; | |
1580 | } | |
1581 | ||
1582 | #define NOTALIGNED(x) (x & (mtd->oobblock-1)) != 0 | |
1583 | ||
1584 | /** | |
1585 | * nand_write - [MTD Interface] compability function for nand_write_ecc | |
1586 | * @mtd: MTD device structure | |
1587 | * @to: offset to write to | |
1588 | * @len: number of bytes to write | |
1589 | * @retlen: pointer to variable to store the number of written bytes | |
1590 | * @buf: the data to write | |
1591 | * | |
1592 | * This function simply calls nand_write_ecc with oob buffer and oobsel = NULL | |
1593 | * | |
1594 | */ | |
1595 | static int nand_write (struct mtd_info *mtd, loff_t to, size_t len, size_t * retlen, const u_char * buf) | |
1596 | { | |
1597 | return (nand_write_ecc (mtd, to, len, retlen, buf, NULL, NULL)); | |
1598 | } | |
ac7eb8a3 | 1599 | |
932394ac WD |
1600 | /** |
1601 | * nand_write_ecc - [MTD Interface] NAND write with ECC | |
1602 | * @mtd: MTD device structure | |
1603 | * @to: offset to write to | |
1604 | * @len: number of bytes to write | |
1605 | * @retlen: pointer to variable to store the number of written bytes | |
1606 | * @buf: the data to write | |
1607 | * @eccbuf: filesystem supplied oob data buffer | |
1608 | * @oobsel: oob selection structure | |
1609 | * | |
1610 | * NAND write with ECC | |
1611 | */ | |
1612 | static int nand_write_ecc (struct mtd_info *mtd, loff_t to, size_t len, | |
1613 | size_t * retlen, const u_char * buf, u_char * eccbuf, struct nand_oobinfo *oobsel) | |
1614 | { | |
1615 | int startpage, page, ret = -EIO, oob = 0, written = 0, chipnr; | |
1616 | int autoplace = 0, numpages, totalpages; | |
1617 | struct nand_chip *this = mtd->priv; | |
1618 | u_char *oobbuf, *bufstart; | |
1619 | int ppblock = (1 << (this->phys_erase_shift - this->page_shift)); | |
1620 | ||
1621 | DEBUG (MTD_DEBUG_LEVEL3, "nand_write_ecc: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len); | |
1622 | ||
1623 | /* Initialize retlen, in case of early exit */ | |
1624 | *retlen = 0; | |
1625 | ||
1626 | /* Do not allow write past end of device */ | |
1627 | if ((to + len) > mtd->size) { | |
1628 | DEBUG (MTD_DEBUG_LEVEL0, "nand_write_ecc: Attempt to write past end of page\n"); | |
1629 | return -EINVAL; | |
1630 | } | |
1631 | ||
ac7eb8a3 | 1632 | /* reject writes, which are not page aligned */ |
932394ac WD |
1633 | if (NOTALIGNED (to) || NOTALIGNED(len)) { |
1634 | printk (KERN_NOTICE "nand_write_ecc: Attempt to write not page aligned data\n"); | |
1635 | return -EINVAL; | |
1636 | } | |
1637 | ||
1638 | /* Grab the lock and see if the device is available */ | |
1639 | nand_get_device (this, mtd, FL_WRITING); | |
1640 | ||
1641 | /* Calculate chipnr */ | |
1642 | chipnr = (int)(to >> this->chip_shift); | |
1643 | /* Select the NAND device */ | |
1644 | this->select_chip(mtd, chipnr); | |
1645 | ||
1646 | /* Check, if it is write protected */ | |
1647 | if (nand_check_wp(mtd)) | |
1648 | goto out; | |
1649 | ||
1650 | /* if oobsel is NULL, use chip defaults */ | |
ac7eb8a3 WD |
1651 | if (oobsel == NULL) |
1652 | oobsel = &mtd->oobinfo; | |
1653 | ||
932394ac WD |
1654 | /* Autoplace of oob data ? Use the default placement scheme */ |
1655 | if (oobsel->useecc == MTD_NANDECC_AUTOPLACE) { | |
1656 | oobsel = this->autooob; | |
1657 | autoplace = 1; | |
ac7eb8a3 | 1658 | } |
932394ac WD |
1659 | if (oobsel->useecc == MTD_NANDECC_AUTOPL_USR) |
1660 | autoplace = 1; | |
1661 | ||
1662 | /* Setup variables and oob buffer */ | |
1663 | totalpages = len >> this->page_shift; | |
1664 | page = (int) (to >> this->page_shift); | |
1665 | /* Invalidate the page cache, if we write to the cached page */ | |
ac7eb8a3 | 1666 | if (page <= this->pagebuf && this->pagebuf < (page + totalpages)) |
932394ac | 1667 | this->pagebuf = -1; |
ac7eb8a3 | 1668 | |
932394ac WD |
1669 | /* Set it relative to chip */ |
1670 | page &= this->pagemask; | |
1671 | startpage = page; | |
1672 | /* Calc number of pages we can write in one go */ | |
1673 | numpages = min (ppblock - (startpage & (ppblock - 1)), totalpages); | |
1674 | oobbuf = nand_prepare_oobbuf (mtd, eccbuf, oobsel, autoplace, numpages); | |
1675 | bufstart = (u_char *)buf; | |
1676 | ||
1677 | /* Loop until all data is written */ | |
1678 | while (written < len) { | |
1679 | ||
1680 | this->data_poi = (u_char*) &buf[written]; | |
1681 | /* Write one page. If this is the last page to write | |
1682 | * or the last page in this block, then use the | |
1683 | * real pageprogram command, else select cached programming | |
1684 | * if supported by the chip. | |
1685 | */ | |
1686 | ret = nand_write_page (mtd, this, page, &oobbuf[oob], oobsel, (--numpages > 0)); | |
1687 | if (ret) { | |
1688 | DEBUG (MTD_DEBUG_LEVEL0, "nand_write_ecc: write_page failed %d\n", ret); | |
1689 | goto out; | |
ac7eb8a3 | 1690 | } |
932394ac WD |
1691 | /* Next oob page */ |
1692 | oob += mtd->oobsize; | |
1693 | /* Update written bytes count */ | |
1694 | written += mtd->oobblock; | |
ac7eb8a3 | 1695 | if (written == len) |
932394ac | 1696 | goto cmp; |
ac7eb8a3 | 1697 | |
932394ac WD |
1698 | /* Increment page address */ |
1699 | page++; | |
1700 | ||
1701 | /* Have we hit a block boundary ? Then we have to verify and | |
1702 | * if verify is ok, we have to setup the oob buffer for | |
1703 | * the next pages. | |
1704 | */ | |
1705 | if (!(page & (ppblock - 1))){ | |
1706 | int ofs; | |
1707 | this->data_poi = bufstart; | |
ac7eb8a3 | 1708 | ret = nand_verify_pages (mtd, this, startpage, |
932394ac WD |
1709 | page - startpage, |
1710 | oobbuf, oobsel, chipnr, (eccbuf != NULL)); | |
1711 | if (ret) { | |
1712 | DEBUG (MTD_DEBUG_LEVEL0, "nand_write_ecc: verify_pages failed %d\n", ret); | |
1713 | goto out; | |
ac7eb8a3 | 1714 | } |
932394ac WD |
1715 | *retlen = written; |
1716 | ||
1717 | ofs = autoplace ? mtd->oobavail : mtd->oobsize; | |
1718 | if (eccbuf) | |
1719 | eccbuf += (page - startpage) * ofs; | |
1720 | totalpages -= page - startpage; | |
1721 | numpages = min (totalpages, ppblock); | |
1722 | page &= this->pagemask; | |
1723 | startpage = page; | |
ac7eb8a3 | 1724 | oobbuf = nand_prepare_oobbuf (mtd, eccbuf, oobsel, |
932394ac WD |
1725 | autoplace, numpages); |
1726 | /* Check, if we cross a chip boundary */ | |
1727 | if (!page) { | |
1728 | chipnr++; | |
1729 | this->select_chip(mtd, -1); | |
1730 | this->select_chip(mtd, chipnr); | |
1731 | } | |
1732 | } | |
1733 | } | |
1734 | /* Verify the remaining pages */ | |
1735 | cmp: | |
1736 | this->data_poi = bufstart; | |
1737 | ret = nand_verify_pages (mtd, this, startpage, totalpages, | |
1738 | oobbuf, oobsel, chipnr, (eccbuf != NULL)); | |
1739 | if (!ret) | |
1740 | *retlen = written; | |
ac7eb8a3 | 1741 | else |
932394ac WD |
1742 | DEBUG (MTD_DEBUG_LEVEL0, "nand_write_ecc: verify_pages failed %d\n", ret); |
1743 | ||
1744 | out: | |
1745 | /* Deselect and wake up anyone waiting on the device */ | |
1746 | nand_release_device(mtd); | |
1747 | ||
1748 | return ret; | |
1749 | } | |
1750 | ||
1751 | ||
1752 | /** | |
1753 | * nand_write_oob - [MTD Interface] NAND write out-of-band | |
1754 | * @mtd: MTD device structure | |
1755 | * @to: offset to write to | |
1756 | * @len: number of bytes to write | |
1757 | * @retlen: pointer to variable to store the number of written bytes | |
1758 | * @buf: the data to write | |
1759 | * | |
1760 | * NAND write out-of-band | |
1761 | */ | |
1762 | static int nand_write_oob (struct mtd_info *mtd, loff_t to, size_t len, size_t * retlen, const u_char * buf) | |
1763 | { | |
1764 | int column, page, status, ret = -EIO, chipnr; | |
1765 | struct nand_chip *this = mtd->priv; | |
1766 | ||
1767 | DEBUG (MTD_DEBUG_LEVEL3, "nand_write_oob: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len); | |
1768 | ||
1769 | /* Shift to get page */ | |
1770 | page = (int) (to >> this->page_shift); | |
1771 | chipnr = (int) (to >> this->chip_shift); | |
1772 | ||
1773 | /* Mask to get column */ | |
1774 | column = to & (mtd->oobsize - 1); | |
1775 | ||
1776 | /* Initialize return length value */ | |
1777 | *retlen = 0; | |
1778 | ||
1779 | /* Do not allow write past end of page */ | |
1780 | if ((column + len) > mtd->oobsize) { | |
1781 | DEBUG (MTD_DEBUG_LEVEL0, "nand_write_oob: Attempt to write past end of page\n"); | |
1782 | return -EINVAL; | |
1783 | } | |
1784 | ||
1785 | /* Grab the lock and see if the device is available */ | |
1786 | nand_get_device (this, mtd, FL_WRITING); | |
1787 | ||
1788 | /* Select the NAND device */ | |
1789 | this->select_chip(mtd, chipnr); | |
1790 | ||
1791 | /* Reset the chip. Some chips (like the Toshiba TC5832DC found | |
1792 | in one of my DiskOnChip 2000 test units) will clear the whole | |
1793 | data page too if we don't do this. I have no clue why, but | |
1794 | I seem to have 'fixed' it in the doc2000 driver in | |
1795 | August 1999. dwmw2. */ | |
1796 | this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); | |
1797 | ||
1798 | /* Check, if it is write protected */ | |
1799 | if (nand_check_wp(mtd)) | |
1800 | goto out; | |
ac7eb8a3 | 1801 | |
932394ac WD |
1802 | /* Invalidate the page cache, if we write to the cached page */ |
1803 | if (page == this->pagebuf) | |
1804 | this->pagebuf = -1; | |
1805 | ||
1806 | if (NAND_MUST_PAD(this)) { | |
1807 | /* Write out desired data */ | |
1808 | this->cmdfunc (mtd, NAND_CMD_SEQIN, mtd->oobblock, page & this->pagemask); | |
1809 | /* prepad 0xff for partial programming */ | |
1810 | this->write_buf(mtd, ffchars, column); | |
1811 | /* write data */ | |
1812 | this->write_buf(mtd, buf, len); | |
1813 | /* postpad 0xff for partial programming */ | |
1814 | this->write_buf(mtd, ffchars, mtd->oobsize - (len+column)); | |
1815 | } else { | |
1816 | /* Write out desired data */ | |
1817 | this->cmdfunc (mtd, NAND_CMD_SEQIN, mtd->oobblock + column, page & this->pagemask); | |
1818 | /* write data */ | |
1819 | this->write_buf(mtd, buf, len); | |
1820 | } | |
1821 | /* Send command to program the OOB data */ | |
1822 | this->cmdfunc (mtd, NAND_CMD_PAGEPROG, -1, -1); | |
1823 | ||
1824 | status = this->waitfunc (mtd, this, FL_WRITING); | |
1825 | ||
1826 | /* See if device thinks it succeeded */ | |
1827 | if (status & 0x01) { | |
1828 | DEBUG (MTD_DEBUG_LEVEL0, "nand_write_oob: " "Failed write, page 0x%08x\n", page); | |
1829 | ret = -EIO; | |
1830 | goto out; | |
1831 | } | |
1832 | /* Return happy */ | |
1833 | *retlen = len; | |
1834 | ||
1835 | #ifdef CONFIG_MTD_NAND_VERIFY_WRITE | |
1836 | /* Send command to read back the data */ | |
1837 | this->cmdfunc (mtd, NAND_CMD_READOOB, column, page & this->pagemask); | |
1838 | ||
1839 | if (this->verify_buf(mtd, buf, len)) { | |
1840 | DEBUG (MTD_DEBUG_LEVEL0, "nand_write_oob: " "Failed write verify, page 0x%08x\n", page); | |
1841 | ret = -EIO; | |
1842 | goto out; | |
1843 | } | |
1844 | #endif | |
1845 | ret = 0; | |
1846 | out: | |
1847 | /* Deselect and wake up anyone waiting on the device */ | |
1848 | nand_release_device(mtd); | |
1849 | ||
1850 | return ret; | |
1851 | } | |
1852 | ||
1853 | /* XXX U-BOOT XXX */ | |
1854 | #if 0 | |
1855 | /** | |
1856 | * nand_writev - [MTD Interface] compabilty function for nand_writev_ecc | |
1857 | * @mtd: MTD device structure | |
1858 | * @vecs: the iovectors to write | |
1859 | * @count: number of vectors | |
1860 | * @to: offset to write to | |
1861 | * @retlen: pointer to variable to store the number of written bytes | |
1862 | * | |
1863 | * NAND write with kvec. This just calls the ecc function | |
1864 | */ | |
ac7eb8a3 | 1865 | static int nand_writev (struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, |
932394ac WD |
1866 | loff_t to, size_t * retlen) |
1867 | { | |
ac7eb8a3 | 1868 | return (nand_writev_ecc (mtd, vecs, count, to, retlen, NULL, NULL)); |
932394ac WD |
1869 | } |
1870 | ||
1871 | /** | |
1872 | * nand_writev_ecc - [MTD Interface] write with iovec with ecc | |
1873 | * @mtd: MTD device structure | |
1874 | * @vecs: the iovectors to write | |
1875 | * @count: number of vectors | |
1876 | * @to: offset to write to | |
1877 | * @retlen: pointer to variable to store the number of written bytes | |
1878 | * @eccbuf: filesystem supplied oob data buffer | |
1879 | * @oobsel: oob selection structure | |
1880 | * | |
1881 | * NAND write with iovec with ecc | |
1882 | */ | |
ac7eb8a3 | 1883 | static int nand_writev_ecc (struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, |
932394ac WD |
1884 | loff_t to, size_t * retlen, u_char *eccbuf, struct nand_oobinfo *oobsel) |
1885 | { | |
1886 | int i, page, len, total_len, ret = -EIO, written = 0, chipnr; | |
1887 | int oob, numpages, autoplace = 0, startpage; | |
1888 | struct nand_chip *this = mtd->priv; | |
1889 | int ppblock = (1 << (this->phys_erase_shift - this->page_shift)); | |
1890 | u_char *oobbuf, *bufstart; | |
1891 | ||
1892 | /* Preset written len for early exit */ | |
1893 | *retlen = 0; | |
1894 | ||
1895 | /* Calculate total length of data */ | |
1896 | total_len = 0; | |
1897 | for (i = 0; i < count; i++) | |
1898 | total_len += (int) vecs[i].iov_len; | |
1899 | ||
1900 | DEBUG (MTD_DEBUG_LEVEL3, | |
1901 | "nand_writev: to = 0x%08x, len = %i, count = %ld\n", (unsigned int) to, (unsigned int) total_len, count); | |
1902 | ||
1903 | /* Do not allow write past end of page */ | |
1904 | if ((to + total_len) > mtd->size) { | |
1905 | DEBUG (MTD_DEBUG_LEVEL0, "nand_writev: Attempted write past end of device\n"); | |
1906 | return -EINVAL; | |
1907 | } | |
1908 | ||
ac7eb8a3 | 1909 | /* reject writes, which are not page aligned */ |
932394ac WD |
1910 | if (NOTALIGNED (to) || NOTALIGNED(total_len)) { |
1911 | printk (KERN_NOTICE "nand_write_ecc: Attempt to write not page aligned data\n"); | |
1912 | return -EINVAL; | |
1913 | } | |
1914 | ||
1915 | /* Grab the lock and see if the device is available */ | |
1916 | nand_get_device (this, mtd, FL_WRITING); | |
1917 | ||
1918 | /* Get the current chip-nr */ | |
1919 | chipnr = (int) (to >> this->chip_shift); | |
1920 | /* Select the NAND device */ | |
1921 | this->select_chip(mtd, chipnr); | |
1922 | ||
1923 | /* Check, if it is write protected */ | |
1924 | if (nand_check_wp(mtd)) | |
1925 | goto out; | |
1926 | ||
1927 | /* if oobsel is NULL, use chip defaults */ | |
ac7eb8a3 WD |
1928 | if (oobsel == NULL) |
1929 | oobsel = &mtd->oobinfo; | |
932394ac WD |
1930 | |
1931 | /* Autoplace of oob data ? Use the default placement scheme */ | |
1932 | if (oobsel->useecc == MTD_NANDECC_AUTOPLACE) { | |
1933 | oobsel = this->autooob; | |
1934 | autoplace = 1; | |
ac7eb8a3 | 1935 | } |
932394ac WD |
1936 | if (oobsel->useecc == MTD_NANDECC_AUTOPL_USR) |
1937 | autoplace = 1; | |
1938 | ||
1939 | /* Setup start page */ | |
1940 | page = (int) (to >> this->page_shift); | |
1941 | /* Invalidate the page cache, if we write to the cached page */ | |
ac7eb8a3 | 1942 | if (page <= this->pagebuf && this->pagebuf < ((to + total_len) >> this->page_shift)) |
932394ac WD |
1943 | this->pagebuf = -1; |
1944 | ||
1945 | startpage = page & this->pagemask; | |
1946 | ||
1947 | /* Loop until all kvec' data has been written */ | |
1948 | len = 0; | |
1949 | while (count) { | |
1950 | /* If the given tuple is >= pagesize then | |
1951 | * write it out from the iov | |
1952 | */ | |
1953 | if ((vecs->iov_len - len) >= mtd->oobblock) { | |
1954 | /* Calc number of pages we can write | |
1955 | * out of this iov in one go */ | |
1956 | numpages = (vecs->iov_len - len) >> this->page_shift; | |
1957 | /* Do not cross block boundaries */ | |
1958 | numpages = min (ppblock - (startpage & (ppblock - 1)), numpages); | |
1959 | oobbuf = nand_prepare_oobbuf (mtd, NULL, oobsel, autoplace, numpages); | |
1960 | bufstart = (u_char *)vecs->iov_base; | |
1961 | bufstart += len; | |
1962 | this->data_poi = bufstart; | |
1963 | oob = 0; | |
1964 | for (i = 1; i <= numpages; i++) { | |
1965 | /* Write one page. If this is the last page to write | |
ac7eb8a3 | 1966 | * then use the real pageprogram command, else select |
932394ac WD |
1967 | * cached programming if supported by the chip. |
1968 | */ | |
ac7eb8a3 | 1969 | ret = nand_write_page (mtd, this, page & this->pagemask, |
932394ac WD |
1970 | &oobbuf[oob], oobsel, i != numpages); |
1971 | if (ret) | |
1972 | goto out; | |
1973 | this->data_poi += mtd->oobblock; | |
1974 | len += mtd->oobblock; | |
1975 | oob += mtd->oobsize; | |
1976 | page++; | |
1977 | } | |
1978 | /* Check, if we have to switch to the next tuple */ | |
1979 | if (len >= (int) vecs->iov_len) { | |
1980 | vecs++; | |
1981 | len = 0; | |
1982 | count--; | |
1983 | } | |
1984 | } else { | |
ac7eb8a3 | 1985 | /* We must use the internal buffer, read data out of each |
932394ac WD |
1986 | * tuple until we have a full page to write |
1987 | */ | |
1988 | int cnt = 0; | |
1989 | while (cnt < mtd->oobblock) { | |
ac7eb8a3 | 1990 | if (vecs->iov_base != NULL && vecs->iov_len) |
932394ac WD |
1991 | this->data_buf[cnt++] = ((u_char *) vecs->iov_base)[len++]; |
1992 | /* Check, if we have to switch to the next tuple */ | |
1993 | if (len >= (int) vecs->iov_len) { | |
1994 | vecs++; | |
1995 | len = 0; | |
1996 | count--; | |
1997 | } | |
1998 | } | |
ac7eb8a3 WD |
1999 | this->pagebuf = page; |
2000 | this->data_poi = this->data_buf; | |
932394ac | 2001 | bufstart = this->data_poi; |
ac7eb8a3 | 2002 | numpages = 1; |
932394ac WD |
2003 | oobbuf = nand_prepare_oobbuf (mtd, NULL, oobsel, autoplace, numpages); |
2004 | ret = nand_write_page (mtd, this, page & this->pagemask, | |
2005 | oobbuf, oobsel, 0); | |
2006 | if (ret) | |
2007 | goto out; | |
2008 | page++; | |
2009 | } | |
2010 | ||
2011 | this->data_poi = bufstart; | |
2012 | ret = nand_verify_pages (mtd, this, startpage, numpages, oobbuf, oobsel, chipnr, 0); | |
2013 | if (ret) | |
2014 | goto out; | |
ac7eb8a3 | 2015 | |
932394ac WD |
2016 | written += mtd->oobblock * numpages; |
2017 | /* All done ? */ | |
2018 | if (!count) | |
2019 | break; | |
2020 | ||
2021 | startpage = page & this->pagemask; | |
2022 | /* Check, if we cross a chip boundary */ | |
2023 | if (!startpage) { | |
2024 | chipnr++; | |
2025 | this->select_chip(mtd, -1); | |
2026 | this->select_chip(mtd, chipnr); | |
2027 | } | |
2028 | } | |
2029 | ret = 0; | |
2030 | out: | |
2031 | /* Deselect and wake up anyone waiting on the device */ | |
2032 | nand_release_device(mtd); | |
2033 | ||
2034 | *retlen = written; | |
2035 | return ret; | |
2036 | } | |
2037 | #endif | |
2038 | ||
2039 | /** | |
2040 | * single_erease_cmd - [GENERIC] NAND standard block erase command function | |
2041 | * @mtd: MTD device structure | |
2042 | * @page: the page address of the block which will be erased | |
2043 | * | |
2044 | * Standard erase command for NAND chips | |
2045 | */ | |
2046 | static void single_erase_cmd (struct mtd_info *mtd, int page) | |
2047 | { | |
2048 | struct nand_chip *this = mtd->priv; | |
2049 | /* Send commands to erase a block */ | |
2050 | this->cmdfunc (mtd, NAND_CMD_ERASE1, -1, page); | |
2051 | this->cmdfunc (mtd, NAND_CMD_ERASE2, -1, -1); | |
2052 | } | |
2053 | ||
2054 | /** | |
2055 | * multi_erease_cmd - [GENERIC] AND specific block erase command function | |
2056 | * @mtd: MTD device structure | |
2057 | * @page: the page address of the block which will be erased | |
2058 | * | |
2059 | * AND multi block erase command function | |
2060 | * Erase 4 consecutive blocks | |
2061 | */ | |
2062 | static void multi_erase_cmd (struct mtd_info *mtd, int page) | |
2063 | { | |
2064 | struct nand_chip *this = mtd->priv; | |
2065 | /* Send commands to erase a block */ | |
2066 | this->cmdfunc (mtd, NAND_CMD_ERASE1, -1, page++); | |
2067 | this->cmdfunc (mtd, NAND_CMD_ERASE1, -1, page++); | |
2068 | this->cmdfunc (mtd, NAND_CMD_ERASE1, -1, page++); | |
2069 | this->cmdfunc (mtd, NAND_CMD_ERASE1, -1, page); | |
2070 | this->cmdfunc (mtd, NAND_CMD_ERASE2, -1, -1); | |
2071 | } | |
2072 | ||
2073 | /** | |
2074 | * nand_erase - [MTD Interface] erase block(s) | |
2075 | * @mtd: MTD device structure | |
2076 | * @instr: erase instruction | |
2077 | * | |
2078 | * Erase one ore more blocks | |
2079 | */ | |
2080 | static int nand_erase (struct mtd_info *mtd, struct erase_info *instr) | |
2081 | { | |
2082 | return nand_erase_nand (mtd, instr, 0); | |
2083 | } | |
ac7eb8a3 | 2084 | |
932394ac WD |
2085 | /** |
2086 | * nand_erase_intern - [NAND Interface] erase block(s) | |
2087 | * @mtd: MTD device structure | |
2088 | * @instr: erase instruction | |
2089 | * @allowbbt: allow erasing the bbt area | |
2090 | * | |
2091 | * Erase one ore more blocks | |
2092 | */ | |
2093 | int nand_erase_nand (struct mtd_info *mtd, struct erase_info *instr, int allowbbt) | |
2094 | { | |
2095 | int page, len, status, pages_per_block, ret, chipnr; | |
2096 | struct nand_chip *this = mtd->priv; | |
2097 | ||
2098 | DEBUG (MTD_DEBUG_LEVEL3, | |
2099 | "nand_erase: start = 0x%08x, len = %i\n", (unsigned int) instr->addr, (unsigned int) instr->len); | |
2100 | ||
2101 | /* Start address must align on block boundary */ | |
2102 | if (instr->addr & ((1 << this->phys_erase_shift) - 1)) { | |
2103 | DEBUG (MTD_DEBUG_LEVEL0, "nand_erase: Unaligned address\n"); | |
2104 | return -EINVAL; | |
2105 | } | |
2106 | ||
2107 | /* Length must align on block boundary */ | |
2108 | if (instr->len & ((1 << this->phys_erase_shift) - 1)) { | |
2109 | DEBUG (MTD_DEBUG_LEVEL0, "nand_erase: Length not block aligned\n"); | |
2110 | return -EINVAL; | |
2111 | } | |
2112 | ||
2113 | /* Do not allow erase past end of device */ | |
2114 | if ((instr->len + instr->addr) > mtd->size) { | |
2115 | DEBUG (MTD_DEBUG_LEVEL0, "nand_erase: Erase past end of device\n"); | |
2116 | return -EINVAL; | |
2117 | } | |
2118 | ||
2119 | instr->fail_addr = 0xffffffff; | |
2120 | ||
2121 | /* Grab the lock and see if the device is available */ | |
2122 | nand_get_device (this, mtd, FL_ERASING); | |
2123 | ||
2124 | /* Shift to get first page */ | |
2125 | page = (int) (instr->addr >> this->page_shift); | |
2126 | chipnr = (int) (instr->addr >> this->chip_shift); | |
2127 | ||
2128 | /* Calculate pages in each block */ | |
2129 | pages_per_block = 1 << (this->phys_erase_shift - this->page_shift); | |
2130 | ||
2131 | /* Select the NAND device */ | |
2132 | this->select_chip(mtd, chipnr); | |
2133 | ||
2134 | /* Check the WP bit */ | |
2135 | /* Check, if it is write protected */ | |
2136 | if (nand_check_wp(mtd)) { | |
2137 | DEBUG (MTD_DEBUG_LEVEL0, "nand_erase: Device is write protected!!!\n"); | |
2138 | instr->state = MTD_ERASE_FAILED; | |
2139 | goto erase_exit; | |
2140 | } | |
2141 | ||
2142 | /* Loop through the pages */ | |
2143 | len = instr->len; | |
2144 | ||
2145 | instr->state = MTD_ERASING; | |
2146 | ||
2147 | while (len) { | |
2148 | /* Check if we have a bad block, we do not erase bad blocks ! */ | |
2149 | if (nand_block_checkbad(mtd, ((loff_t) page) << this->page_shift, 0, allowbbt)) { | |
2150 | printk (KERN_WARNING "nand_erase: attempt to erase a bad block at page 0x%08x\n", page); | |
2151 | instr->state = MTD_ERASE_FAILED; | |
2152 | goto erase_exit; | |
2153 | } | |
ac7eb8a3 WD |
2154 | |
2155 | /* Invalidate the page cache, if we erase the block which contains | |
932394ac WD |
2156 | the current cached page */ |
2157 | if (page <= this->pagebuf && this->pagebuf < (page + pages_per_block)) | |
2158 | this->pagebuf = -1; | |
2159 | ||
2160 | this->erase_cmd (mtd, page & this->pagemask); | |
ac7eb8a3 | 2161 | |
932394ac WD |
2162 | status = this->waitfunc (mtd, this, FL_ERASING); |
2163 | ||
2164 | /* See if block erase succeeded */ | |
2165 | if (status & 0x01) { | |
2166 | DEBUG (MTD_DEBUG_LEVEL0, "nand_erase: " "Failed erase, page 0x%08x\n", page); | |
2167 | instr->state = MTD_ERASE_FAILED; | |
2168 | instr->fail_addr = (page << this->page_shift); | |
2169 | goto erase_exit; | |
2170 | } | |
ac7eb8a3 | 2171 | |
932394ac WD |
2172 | /* Increment page address and decrement length */ |
2173 | len -= (1 << this->phys_erase_shift); | |
2174 | page += pages_per_block; | |
2175 | ||
2176 | /* Check, if we cross a chip boundary */ | |
2177 | if (len && !(page & this->pagemask)) { | |
2178 | chipnr++; | |
2179 | this->select_chip(mtd, -1); | |
2180 | this->select_chip(mtd, chipnr); | |
2181 | } | |
2182 | } | |
2183 | instr->state = MTD_ERASE_DONE; | |
2184 | ||
2185 | erase_exit: | |
2186 | ||
2187 | ret = instr->state == MTD_ERASE_DONE ? 0 : -EIO; | |
2188 | /* Do call back function */ | |
2189 | if (!ret) | |
2190 | mtd_erase_callback(instr); | |
2191 | ||
2192 | /* Deselect and wake up anyone waiting on the device */ | |
2193 | nand_release_device(mtd); | |
2194 | ||
2195 | /* Return more or less happy */ | |
2196 | return ret; | |
2197 | } | |
2198 | ||
2199 | /** | |
2200 | * nand_sync - [MTD Interface] sync | |
2201 | * @mtd: MTD device structure | |
2202 | * | |
2203 | * Sync is actually a wait for chip ready function | |
2204 | */ | |
2205 | static void nand_sync (struct mtd_info *mtd) | |
2206 | { | |
2207 | struct nand_chip *this = mtd->priv; | |
2208 | ||
2209 | DEBUG (MTD_DEBUG_LEVEL3, "nand_sync: called\n"); | |
2210 | ||
2211 | /* Grab the lock and see if the device is available */ | |
2212 | nand_get_device (this, mtd, FL_SYNCING); | |
2213 | /* Release it and go back */ | |
2214 | nand_release_device (mtd); | |
2215 | } | |
2216 | ||
2217 | ||
2218 | /** | |
2219 | * nand_block_isbad - [MTD Interface] Check whether the block at the given offset is bad | |
2220 | * @mtd: MTD device structure | |
2221 | * @ofs: offset relative to mtd start | |
2222 | */ | |
2223 | static int nand_block_isbad (struct mtd_info *mtd, loff_t ofs) | |
2224 | { | |
2225 | /* Check for invalid offset */ | |
ac7eb8a3 | 2226 | if (ofs > mtd->size) |
932394ac | 2227 | return -EINVAL; |
ac7eb8a3 | 2228 | |
932394ac WD |
2229 | return nand_block_checkbad (mtd, ofs, 1, 0); |
2230 | } | |
2231 | ||
2232 | /** | |
2233 | * nand_block_markbad - [MTD Interface] Mark the block at the given offset as bad | |
2234 | * @mtd: MTD device structure | |
2235 | * @ofs: offset relative to mtd start | |
2236 | */ | |
2237 | static int nand_block_markbad (struct mtd_info *mtd, loff_t ofs) | |
2238 | { | |
2239 | struct nand_chip *this = mtd->priv; | |
2240 | int ret; | |
2241 | ||
ac7eb8a3 WD |
2242 | if ((ret = nand_block_isbad(mtd, ofs))) { |
2243 | /* If it was bad already, return success and do nothing. */ | |
932394ac WD |
2244 | if (ret > 0) |
2245 | return 0; | |
ac7eb8a3 WD |
2246 | return ret; |
2247 | } | |
932394ac WD |
2248 | |
2249 | return this->block_markbad(mtd, ofs); | |
2250 | } | |
2251 | ||
2252 | /** | |
2253 | * nand_scan - [NAND Interface] Scan for the NAND device | |
2254 | * @mtd: MTD device structure | |
2255 | * @maxchips: Number of chips to scan for | |
2256 | * | |
2257 | * This fills out all the not initialized function pointers | |
2258 | * with the defaults. | |
2259 | * The flash ID is read and the mtd/chip structures are | |
2260 | * filled with the appropriate values. Buffers are allocated if | |
2261 | * they are not provided by the board driver | |
2262 | * | |
2263 | */ | |
2264 | int nand_scan (struct mtd_info *mtd, int maxchips) | |
2265 | { | |
2266 | int i, j, nand_maf_id, nand_dev_id, busw; | |
2267 | struct nand_chip *this = mtd->priv; | |
2268 | ||
2269 | /* Get buswidth to select the correct functions*/ | |
2270 | busw = this->options & NAND_BUSWIDTH_16; | |
2271 | ||
2272 | /* check for proper chip_delay setup, set 20us if not */ | |
2273 | if (!this->chip_delay) | |
2274 | this->chip_delay = 20; | |
2275 | ||
2276 | /* check, if a user supplied command function given */ | |
2277 | if (this->cmdfunc == NULL) | |
2278 | this->cmdfunc = nand_command; | |
2279 | ||
2280 | /* check, if a user supplied wait function given */ | |
2281 | if (this->waitfunc == NULL) | |
2282 | this->waitfunc = nand_wait; | |
2283 | ||
2284 | if (!this->select_chip) | |
2285 | this->select_chip = nand_select_chip; | |
2286 | if (!this->write_byte) | |
2287 | this->write_byte = busw ? nand_write_byte16 : nand_write_byte; | |
2288 | if (!this->read_byte) | |
2289 | this->read_byte = busw ? nand_read_byte16 : nand_read_byte; | |
2290 | if (!this->write_word) | |
2291 | this->write_word = nand_write_word; | |
2292 | if (!this->read_word) | |
2293 | this->read_word = nand_read_word; | |
2294 | if (!this->block_bad) | |
2295 | this->block_bad = nand_block_bad; | |
2296 | if (!this->block_markbad) | |
2297 | this->block_markbad = nand_default_block_markbad; | |
2298 | if (!this->write_buf) | |
2299 | this->write_buf = busw ? nand_write_buf16 : nand_write_buf; | |
2300 | if (!this->read_buf) | |
2301 | this->read_buf = busw ? nand_read_buf16 : nand_read_buf; | |
2302 | if (!this->verify_buf) | |
2303 | this->verify_buf = busw ? nand_verify_buf16 : nand_verify_buf; | |
2304 | if (!this->scan_bbt) | |
2305 | this->scan_bbt = nand_default_bbt; | |
2306 | ||
2307 | /* Select the device */ | |
2308 | this->select_chip(mtd, 0); | |
2309 | ||
2310 | /* Send the command for reading device ID */ | |
2311 | this->cmdfunc (mtd, NAND_CMD_READID, 0x00, -1); | |
2312 | ||
2313 | /* Read manufacturer and device IDs */ | |
2314 | nand_maf_id = this->read_byte(mtd); | |
2315 | nand_dev_id = this->read_byte(mtd); | |
2316 | ||
2317 | /* Print and store flash device information */ | |
2318 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { | |
ac7eb8a3 WD |
2319 | |
2320 | if (nand_dev_id != nand_flash_ids[i].id) | |
932394ac WD |
2321 | continue; |
2322 | ||
2323 | if (!mtd->name) mtd->name = nand_flash_ids[i].name; | |
2324 | this->chipsize = nand_flash_ids[i].chipsize << 20; | |
ac7eb8a3 | 2325 | |
932394ac WD |
2326 | /* New devices have all the information in additional id bytes */ |
2327 | if (!nand_flash_ids[i].pagesize) { | |
2328 | int extid; | |
2329 | /* The 3rd id byte contains non relevant data ATM */ | |
2330 | extid = this->read_byte(mtd); | |
2331 | /* The 4th id byte is the important one */ | |
2332 | extid = this->read_byte(mtd); | |
2333 | /* Calc pagesize */ | |
2334 | mtd->oobblock = 1024 << (extid & 0x3); | |
2335 | extid >>= 2; | |
2336 | /* Calc oobsize */ | |
2337 | mtd->oobsize = (8 << (extid & 0x03)) * (mtd->oobblock / 512); | |
2338 | extid >>= 2; | |
2339 | /* Calc blocksize. Blocksize is multiples of 64KiB */ | |
2340 | mtd->erasesize = (64 * 1024) << (extid & 0x03); | |
2341 | extid >>= 2; | |
2342 | /* Get buswidth information */ | |
2343 | busw = (extid & 0x01) ? NAND_BUSWIDTH_16 : 0; | |
ac7eb8a3 | 2344 | |
932394ac WD |
2345 | } else { |
2346 | /* Old devices have this data hardcoded in the | |
2347 | * device id table */ | |
2348 | mtd->erasesize = nand_flash_ids[i].erasesize; | |
2349 | mtd->oobblock = nand_flash_ids[i].pagesize; | |
2350 | mtd->oobsize = mtd->oobblock / 32; | |
2351 | busw = nand_flash_ids[i].options & NAND_BUSWIDTH_16; | |
2352 | } | |
2353 | ||
2354 | /* Check, if buswidth is correct. Hardware drivers should set | |
2355 | * this correct ! */ | |
2356 | if (busw != (this->options & NAND_BUSWIDTH_16)) { | |
2357 | printk (KERN_INFO "NAND device: Manufacturer ID:" | |
ac7eb8a3 | 2358 | " 0x%02x, Chip ID: 0x%02x (%s %s)\n", nand_maf_id, nand_dev_id, |
932394ac | 2359 | nand_manuf_ids[i].name , mtd->name); |
ac7eb8a3 WD |
2360 | printk (KERN_WARNING |
2361 | "NAND bus width %d instead %d bit\n", | |
932394ac WD |
2362 | (this->options & NAND_BUSWIDTH_16) ? 16 : 8, |
2363 | busw ? 16 : 8); | |
2364 | this->select_chip(mtd, -1); | |
ac7eb8a3 | 2365 | return 1; |
932394ac | 2366 | } |
ac7eb8a3 WD |
2367 | |
2368 | /* Calculate the address shift from the page size */ | |
932394ac WD |
2369 | this->page_shift = ffs(mtd->oobblock) - 1; |
2370 | this->bbt_erase_shift = this->phys_erase_shift = ffs(mtd->erasesize) - 1; | |
2371 | this->chip_shift = ffs(this->chipsize) - 1; | |
2372 | ||
2373 | /* Set the bad block position */ | |
ac7eb8a3 | 2374 | this->badblockpos = mtd->oobblock > 512 ? |
932394ac WD |
2375 | NAND_LARGE_BADBLOCK_POS : NAND_SMALL_BADBLOCK_POS; |
2376 | ||
2377 | /* Get chip options, preserve non chip based options */ | |
2378 | this->options &= ~NAND_CHIPOPTIONS_MSK; | |
2379 | this->options |= nand_flash_ids[i].options & NAND_CHIPOPTIONS_MSK; | |
2380 | /* Set this as a default. Board drivers can override it, if neccecary */ | |
2381 | this->options |= NAND_NO_AUTOINCR; | |
2382 | /* Check if this is a not a samsung device. Do not clear the options | |
2383 | * for chips which are not having an extended id. | |
ac7eb8a3 | 2384 | */ |
932394ac WD |
2385 | if (nand_maf_id != NAND_MFR_SAMSUNG && !nand_flash_ids[i].pagesize) |
2386 | this->options &= ~NAND_SAMSUNG_LP_OPTIONS; | |
ac7eb8a3 | 2387 | |
932394ac WD |
2388 | /* Check for AND chips with 4 page planes */ |
2389 | if (this->options & NAND_4PAGE_ARRAY) | |
2390 | this->erase_cmd = multi_erase_cmd; | |
2391 | else | |
2392 | this->erase_cmd = single_erase_cmd; | |
2393 | ||
2394 | /* Do not replace user supplied command function ! */ | |
2395 | if (mtd->oobblock > 512 && this->cmdfunc == nand_command) | |
2396 | this->cmdfunc = nand_command_lp; | |
ac7eb8a3 | 2397 | |
932394ac WD |
2398 | /* Try to identify manufacturer */ |
2399 | for (j = 0; nand_manuf_ids[j].id != 0x0; j++) { | |
2400 | if (nand_manuf_ids[j].id == nand_maf_id) | |
2401 | break; | |
2402 | } | |
932394ac WD |
2403 | break; |
2404 | } | |
2405 | ||
2406 | if (!nand_flash_ids[i].name) { | |
2407 | printk (KERN_WARNING "No NAND device found!!!\n"); | |
2408 | this->select_chip(mtd, -1); | |
2409 | return 1; | |
2410 | } | |
2411 | ||
2412 | for (i=1; i < maxchips; i++) { | |
2413 | this->select_chip(mtd, i); | |
2414 | ||
2415 | /* Send the command for reading device ID */ | |
2416 | this->cmdfunc (mtd, NAND_CMD_READID, 0x00, -1); | |
2417 | ||
2418 | /* Read manufacturer and device IDs */ | |
2419 | if (nand_maf_id != this->read_byte(mtd) || | |
2420 | nand_dev_id != this->read_byte(mtd)) | |
2421 | break; | |
2422 | } | |
2423 | if (i > 1) | |
2424 | printk(KERN_INFO "%d NAND chips detected\n", i); | |
ac7eb8a3 | 2425 | |
932394ac WD |
2426 | /* Allocate buffers, if neccecary */ |
2427 | if (!this->oob_buf) { | |
2428 | size_t len; | |
2429 | len = mtd->oobsize << (this->phys_erase_shift - this->page_shift); | |
2430 | this->oob_buf = kmalloc (len, GFP_KERNEL); | |
2431 | if (!this->oob_buf) { | |
2432 | printk (KERN_ERR "nand_scan(): Cannot allocate oob_buf\n"); | |
2433 | return -ENOMEM; | |
2434 | } | |
2435 | this->options |= NAND_OOBBUF_ALLOC; | |
2436 | } | |
ac7eb8a3 | 2437 | |
932394ac WD |
2438 | if (!this->data_buf) { |
2439 | size_t len; | |
2440 | len = mtd->oobblock + mtd->oobsize; | |
2441 | this->data_buf = kmalloc (len, GFP_KERNEL); | |
2442 | if (!this->data_buf) { | |
2443 | if (this->options & NAND_OOBBUF_ALLOC) | |
2444 | kfree (this->oob_buf); | |
2445 | printk (KERN_ERR "nand_scan(): Cannot allocate data_buf\n"); | |
2446 | return -ENOMEM; | |
2447 | } | |
2448 | this->options |= NAND_DATABUF_ALLOC; | |
2449 | } | |
2450 | ||
2451 | /* Store the number of chips and calc total size for mtd */ | |
2452 | this->numchips = i; | |
2453 | mtd->size = i * this->chipsize; | |
2454 | /* Convert chipsize to number of pages per chip -1. */ | |
2455 | this->pagemask = (this->chipsize >> this->page_shift) - 1; | |
2456 | /* Preset the internal oob buffer */ | |
2457 | memset(this->oob_buf, 0xff, mtd->oobsize << (this->phys_erase_shift - this->page_shift)); | |
2458 | ||
2459 | /* If no default placement scheme is given, select an | |
2460 | * appropriate one */ | |
2461 | if (!this->autooob) { | |
2462 | /* Select the appropriate default oob placement scheme for | |
2463 | * placement agnostic filesystems */ | |
ac7eb8a3 | 2464 | switch (mtd->oobsize) { |
932394ac WD |
2465 | case 8: |
2466 | this->autooob = &nand_oob_8; | |
2467 | break; | |
2468 | case 16: | |
2469 | this->autooob = &nand_oob_16; | |
2470 | break; | |
2471 | case 64: | |
2472 | this->autooob = &nand_oob_64; | |
2473 | break; | |
2474 | default: | |
2475 | printk (KERN_WARNING "No oob scheme defined for oobsize %d\n", | |
2476 | mtd->oobsize); | |
2477 | /* BUG(); */ | |
2478 | } | |
2479 | } | |
ac7eb8a3 | 2480 | |
932394ac WD |
2481 | /* The number of bytes available for the filesystem to place fs dependend |
2482 | * oob data */ | |
2483 | if (this->options & NAND_BUSWIDTH_16) { | |
2484 | mtd->oobavail = mtd->oobsize - (this->autooob->eccbytes + 2); | |
2485 | if (this->autooob->eccbytes & 0x01) | |
2486 | mtd->oobavail--; | |
2487 | } else | |
2488 | mtd->oobavail = mtd->oobsize - (this->autooob->eccbytes + 1); | |
2489 | ||
ac7eb8a3 | 2490 | /* |
932394ac WD |
2491 | * check ECC mode, default to software |
2492 | * if 3byte/512byte hardware ECC is selected and we have 256 byte pagesize | |
ac7eb8a3 | 2493 | * fallback to software ECC |
932394ac | 2494 | */ |
ac7eb8a3 | 2495 | this->eccsize = 256; /* set default eccsize */ |
932394ac WD |
2496 | this->eccbytes = 3; |
2497 | ||
2498 | switch (this->eccmode) { | |
2499 | case NAND_ECC_HW12_2048: | |
2500 | if (mtd->oobblock < 2048) { | |
2501 | printk(KERN_WARNING "2048 byte HW ECC not possible on %d byte page size, fallback to SW ECC\n", | |
2502 | mtd->oobblock); | |
2503 | this->eccmode = NAND_ECC_SOFT; | |
2504 | this->calculate_ecc = nand_calculate_ecc; | |
2505 | this->correct_data = nand_correct_data; | |
2506 | } else | |
2507 | this->eccsize = 2048; | |
2508 | break; | |
2509 | ||
ac7eb8a3 WD |
2510 | case NAND_ECC_HW3_512: |
2511 | case NAND_ECC_HW6_512: | |
2512 | case NAND_ECC_HW8_512: | |
932394ac WD |
2513 | if (mtd->oobblock == 256) { |
2514 | printk (KERN_WARNING "512 byte HW ECC not possible on 256 Byte pagesize, fallback to SW ECC \n"); | |
2515 | this->eccmode = NAND_ECC_SOFT; | |
2516 | this->calculate_ecc = nand_calculate_ecc; | |
2517 | this->correct_data = nand_correct_data; | |
ac7eb8a3 | 2518 | } else |
932394ac WD |
2519 | this->eccsize = 512; /* set eccsize to 512 */ |
2520 | break; | |
ac7eb8a3 | 2521 | |
932394ac WD |
2522 | case NAND_ECC_HW3_256: |
2523 | break; | |
ac7eb8a3 WD |
2524 | |
2525 | case NAND_ECC_NONE: | |
932394ac WD |
2526 | printk (KERN_WARNING "NAND_ECC_NONE selected by board driver. This is not recommended !!\n"); |
2527 | this->eccmode = NAND_ECC_NONE; | |
2528 | break; | |
2529 | ||
ac7eb8a3 | 2530 | case NAND_ECC_SOFT: |
932394ac WD |
2531 | this->calculate_ecc = nand_calculate_ecc; |
2532 | this->correct_data = nand_correct_data; | |
2533 | break; | |
2534 | ||
2535 | default: | |
2536 | printk (KERN_WARNING "Invalid NAND_ECC_MODE %d\n", this->eccmode); | |
2537 | /* BUG(); */ | |
ac7eb8a3 | 2538 | } |
932394ac | 2539 | |
ac7eb8a3 | 2540 | /* Check hardware ecc function availability and adjust number of ecc bytes per |
932394ac WD |
2541 | * calculation step |
2542 | */ | |
2543 | switch (this->eccmode) { | |
2544 | case NAND_ECC_HW12_2048: | |
2545 | this->eccbytes += 4; | |
ac7eb8a3 | 2546 | case NAND_ECC_HW8_512: |
932394ac | 2547 | this->eccbytes += 2; |
ac7eb8a3 | 2548 | case NAND_ECC_HW6_512: |
932394ac | 2549 | this->eccbytes += 3; |
ac7eb8a3 | 2550 | case NAND_ECC_HW3_512: |
932394ac WD |
2551 | case NAND_ECC_HW3_256: |
2552 | if (this->calculate_ecc && this->correct_data && this->enable_hwecc) | |
2553 | break; | |
2554 | printk (KERN_WARNING "No ECC functions supplied, Hardware ECC not possible\n"); | |
2555 | /* BUG(); */ | |
2556 | } | |
ac7eb8a3 | 2557 | |
932394ac | 2558 | mtd->eccsize = this->eccsize; |
ac7eb8a3 | 2559 | |
932394ac WD |
2560 | /* Set the number of read / write steps for one page to ensure ECC generation */ |
2561 | switch (this->eccmode) { | |
2562 | case NAND_ECC_HW12_2048: | |
2563 | this->eccsteps = mtd->oobblock / 2048; | |
2564 | break; | |
2565 | case NAND_ECC_HW3_512: | |
2566 | case NAND_ECC_HW6_512: | |
2567 | case NAND_ECC_HW8_512: | |
2568 | this->eccsteps = mtd->oobblock / 512; | |
2569 | break; | |
2570 | case NAND_ECC_HW3_256: | |
ac7eb8a3 | 2571 | case NAND_ECC_SOFT: |
932394ac WD |
2572 | this->eccsteps = mtd->oobblock / 256; |
2573 | break; | |
ac7eb8a3 WD |
2574 | |
2575 | case NAND_ECC_NONE: | |
932394ac WD |
2576 | this->eccsteps = 1; |
2577 | break; | |
2578 | } | |
2579 | ||
2580 | /* XXX U-BOOT XXX */ | |
ac7eb8a3 | 2581 | #if 0 |
932394ac WD |
2582 | /* Initialize state, waitqueue and spinlock */ |
2583 | this->state = FL_READY; | |
2584 | init_waitqueue_head (&this->wq); | |
2585 | spin_lock_init (&this->chip_lock); | |
2586 | #endif | |
2587 | ||
2588 | /* De-select the device */ | |
2589 | this->select_chip(mtd, -1); | |
2590 | ||
2591 | /* Invalidate the pagebuffer reference */ | |
2592 | this->pagebuf = -1; | |
2593 | ||
2594 | /* Fill in remaining MTD driver data */ | |
2595 | mtd->type = MTD_NANDFLASH; | |
2596 | mtd->flags = MTD_CAP_NANDFLASH | MTD_ECC; | |
2597 | mtd->ecctype = MTD_ECC_SW; | |
2598 | mtd->erase = nand_erase; | |
2599 | mtd->point = NULL; | |
2600 | mtd->unpoint = NULL; | |
2601 | mtd->read = nand_read; | |
2602 | mtd->write = nand_write; | |
2603 | mtd->read_ecc = nand_read_ecc; | |
2604 | mtd->write_ecc = nand_write_ecc; | |
2605 | mtd->read_oob = nand_read_oob; | |
2606 | mtd->write_oob = nand_write_oob; | |
2607 | /* XXX U-BOOT XXX */ | |
2608 | #if 0 | |
2609 | mtd->readv = NULL; | |
2610 | mtd->writev = nand_writev; | |
2611 | mtd->writev_ecc = nand_writev_ecc; | |
2612 | #endif | |
2613 | mtd->sync = nand_sync; | |
2614 | /* XXX U-BOOT XXX */ | |
2615 | #if 0 | |
2616 | mtd->lock = NULL; | |
2617 | mtd->unlock = NULL; | |
2618 | mtd->suspend = NULL; | |
2619 | mtd->resume = NULL; | |
2620 | #endif | |
2621 | mtd->block_isbad = nand_block_isbad; | |
2622 | mtd->block_markbad = nand_block_markbad; | |
2623 | ||
2624 | /* and make the autooob the default one */ | |
2625 | memcpy(&mtd->oobinfo, this->autooob, sizeof(mtd->oobinfo)); | |
2626 | /* XXX U-BOOT XXX */ | |
2627 | #if 0 | |
2628 | mtd->owner = THIS_MODULE; | |
2629 | #endif | |
2630 | /* Build bad block table */ | |
2631 | return this->scan_bbt (mtd); | |
2632 | } | |
2633 | ||
2634 | /** | |
ac7eb8a3 | 2635 | * nand_release - [NAND Interface] Free resources held by the NAND device |
932394ac | 2636 | * @mtd: MTD device structure |
ac7eb8a3 | 2637 | */ |
932394ac WD |
2638 | void nand_release (struct mtd_info *mtd) |
2639 | { | |
2640 | struct nand_chip *this = mtd->priv; | |
2641 | ||
2642 | #ifdef CONFIG_MTD_PARTITIONS | |
2643 | /* Deregister partitions */ | |
2644 | del_mtd_partitions (mtd); | |
2645 | #endif | |
2646 | /* Deregister the device */ | |
2647 | /* XXX U-BOOT XXX */ | |
2648 | #if 0 | |
2649 | del_mtd_device (mtd); | |
2650 | #endif | |
2651 | /* Free bad block table memory, if allocated */ | |
2652 | if (this->bbt) | |
2653 | kfree (this->bbt); | |
2654 | /* Buffer allocated by nand_scan ? */ | |
2655 | if (this->options & NAND_OOBBUF_ALLOC) | |
2656 | kfree (this->oob_buf); | |
2657 | /* Buffer allocated by nand_scan ? */ | |
2658 | if (this->options & NAND_DATABUF_ALLOC) | |
2659 | kfree (this->data_buf); | |
2660 | } | |
2661 | ||
2662 | #endif | |
038ccac5 BS |
2663 | #endif /* CONFIG_NEW_NAND_CODE */ |
2664 |