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Commit | Line | Data |
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1da177e4 LT |
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. | |
61b03bd7 | 8 | * |
1da177e4 LT |
9 | * Additional technical information is available on |
10 | * http://www.linux-mtd.infradead.org/tech/nand.html | |
61b03bd7 | 11 | * |
1da177e4 | 12 | * Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com) |
2c0a2bed | 13 | * 2002 Thomas Gleixner (tglx@linutronix.de) |
1da177e4 | 14 | * |
61b03bd7 | 15 | * 02-08-2004 tglx: support for strange chips, which cannot auto increment |
1da177e4 LT |
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 | |
61b03bd7 | 24 | * |
1da177e4 LT |
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 | |
2c0a2bed TG |
28 | * among multiple independend devices. Suggestions and initial |
29 | * patch from Ben Dooks <ben-mtd@fluff.org> | |
30 | * | |
31 | * 12-05-2004 dmarlin: add workaround for Renesas AG-AND chips "disturb" | |
32 | * issue. Basically, any block not rewritten may lose data when | |
33 | * surrounding blocks are rewritten many times. JFFS2 ensures | |
34 | * this doesn't happen for blocks it uses, but the Bad Block | |
35 | * Table(s) may not be rewritten. To ensure they do not lose | |
36 | * data, force them to be rewritten when some of the surrounding | |
37 | * blocks are erased. Rather than tracking a specific nearby | |
38 | * block (which could itself go bad), use a page address 'mask' to | |
39 | * select several blocks in the same area, and rewrite the BBT | |
40 | * when any of them are erased. | |
41 | * | |
42 | * 01-03-2005 dmarlin: added support for the device recovery command sequence | |
43 | * for Renesas AG-AND chips. If there was a sudden loss of power | |
44 | * during an erase operation, a "device recovery" operation must | |
45 | * be performed when power is restored to ensure correct | |
46 | * operation. | |
47 | * | |
48 | * 01-20-2005 dmarlin: added support for optional hardware specific callback | |
49 | * routine to perform extra error status checks on erase and write | |
50 | * failures. This required adding a wrapper function for | |
51 | * nand_read_ecc. | |
068e3c0a | 52 | * |
962034f4 VW |
53 | * 08-20-2005 vwool: suspend/resume added |
54 | * | |
1da177e4 | 55 | * Credits: |
61b03bd7 TG |
56 | * David Woodhouse for adding multichip support |
57 | * | |
1da177e4 LT |
58 | * Aleph One Ltd. and Toby Churchill Ltd. for supporting the |
59 | * rework for 2K page size chips | |
60 | * | |
61 | * TODO: | |
62 | * Enable cached programming for 2k page size chips | |
63 | * Check, if mtd->ecctype should be set to MTD_ECC_HW | |
64 | * if we have HW ecc support. | |
65 | * The AG-AND chips have nice features for speed improvement, | |
66 | * which are not supported yet. Read / program 4 pages in one go. | |
67 | * | |
962034f4 | 68 | * $Id: nand_base.c,v 1.150 2005/09/15 13:58:48 vwool Exp $ |
1da177e4 LT |
69 | * |
70 | * This program is free software; you can redistribute it and/or modify | |
71 | * it under the terms of the GNU General Public License version 2 as | |
72 | * published by the Free Software Foundation. | |
73 | * | |
74 | */ | |
75 | ||
552d9205 | 76 | #include <linux/module.h> |
1da177e4 LT |
77 | #include <linux/delay.h> |
78 | #include <linux/errno.h> | |
7aa65bfd | 79 | #include <linux/err.h> |
1da177e4 LT |
80 | #include <linux/sched.h> |
81 | #include <linux/slab.h> | |
82 | #include <linux/types.h> | |
83 | #include <linux/mtd/mtd.h> | |
84 | #include <linux/mtd/nand.h> | |
85 | #include <linux/mtd/nand_ecc.h> | |
86 | #include <linux/mtd/compatmac.h> | |
87 | #include <linux/interrupt.h> | |
88 | #include <linux/bitops.h> | |
8fe833c1 | 89 | #include <linux/leds.h> |
1da177e4 LT |
90 | #include <asm/io.h> |
91 | ||
92 | #ifdef CONFIG_MTD_PARTITIONS | |
93 | #include <linux/mtd/partitions.h> | |
94 | #endif | |
95 | ||
96 | /* Define default oob placement schemes for large and small page devices */ | |
97 | static struct nand_oobinfo nand_oob_8 = { | |
98 | .useecc = MTD_NANDECC_AUTOPLACE, | |
99 | .eccbytes = 3, | |
100 | .eccpos = {0, 1, 2}, | |
e0c7d767 | 101 | .oobfree = {{3, 2}, {6, 2}} |
1da177e4 LT |
102 | }; |
103 | ||
104 | static struct nand_oobinfo nand_oob_16 = { | |
105 | .useecc = MTD_NANDECC_AUTOPLACE, | |
106 | .eccbytes = 6, | |
107 | .eccpos = {0, 1, 2, 3, 6, 7}, | |
e0c7d767 | 108 | .oobfree = {{8, 8}} |
1da177e4 LT |
109 | }; |
110 | ||
111 | static struct nand_oobinfo nand_oob_64 = { | |
112 | .useecc = MTD_NANDECC_AUTOPLACE, | |
113 | .eccbytes = 24, | |
114 | .eccpos = { | |
e0c7d767 DW |
115 | 40, 41, 42, 43, 44, 45, 46, 47, |
116 | 48, 49, 50, 51, 52, 53, 54, 55, | |
117 | 56, 57, 58, 59, 60, 61, 62, 63}, | |
118 | .oobfree = {{2, 38}} | |
1da177e4 LT |
119 | }; |
120 | ||
121 | /* This is used for padding purposes in nand_write_oob */ | |
58dd8f2b | 122 | static uint8_t ffchars[] = { |
1da177e4 LT |
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 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
128 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
129 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
130 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
131 | }; | |
132 | ||
133 | /* | |
134 | * NAND low-level MTD interface functions | |
135 | */ | |
58dd8f2b TG |
136 | static void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len); |
137 | static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len); | |
138 | static int nand_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len); | |
1da177e4 | 139 | |
2c0a2bed | 140 | static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, |
58dd8f2b | 141 | size_t *retlen, uint8_t *buf); |
e0c7d767 | 142 | static int nand_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, |
58dd8f2b | 143 | size_t *retlen, uint8_t *buf, uint8_t *eccbuf, |
2c0a2bed TG |
144 | struct nand_oobinfo *oobsel); |
145 | static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, | |
58dd8f2b | 146 | size_t *retlen, uint8_t *buf); |
2c0a2bed | 147 | static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, |
58dd8f2b | 148 | size_t *retlen, const uint8_t *buf); |
e0c7d767 | 149 | static int nand_write_ecc(struct mtd_info *mtd, loff_t to, size_t len, |
58dd8f2b | 150 | size_t *retlen, const uint8_t *buf, uint8_t *eccbuf, |
2c0a2bed TG |
151 | struct nand_oobinfo *oobsel); |
152 | static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, | |
58dd8f2b | 153 | size_t *retlen, const uint8_t *buf); |
2c0a2bed TG |
154 | static int nand_writev(struct mtd_info *mtd, const struct kvec *vecs, |
155 | unsigned long count, loff_t to, size_t *retlen); | |
e0c7d767 | 156 | static int nand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs, |
2c0a2bed | 157 | unsigned long count, loff_t to, size_t *retlen, |
58dd8f2b | 158 | uint8_t *eccbuf, struct nand_oobinfo *oobsel); |
e0c7d767 DW |
159 | static int nand_erase(struct mtd_info *mtd, struct erase_info *instr); |
160 | static void nand_sync(struct mtd_info *mtd); | |
1da177e4 LT |
161 | |
162 | /* Some internal functions */ | |
2c0a2bed | 163 | static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, |
58dd8f2b | 164 | int page, uint8_t * oob_buf, |
e0c7d767 | 165 | struct nand_oobinfo *oobsel, int mode); |
1da177e4 | 166 | #ifdef CONFIG_MTD_NAND_VERIFY_WRITE |
2c0a2bed | 167 | static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, |
58dd8f2b | 168 | int page, int numpages, uint8_t *oob_buf, |
2c0a2bed TG |
169 | struct nand_oobinfo *oobsel, int chipnr, |
170 | int oobmode); | |
1da177e4 LT |
171 | #else |
172 | #define nand_verify_pages(...) (0) | |
173 | #endif | |
61b03bd7 | 174 | |
2c0a2bed TG |
175 | static int nand_get_device(struct nand_chip *this, struct mtd_info *mtd, |
176 | int new_state); | |
1da177e4 LT |
177 | |
178 | /** | |
179 | * nand_release_device - [GENERIC] release chip | |
180 | * @mtd: MTD device structure | |
61b03bd7 TG |
181 | * |
182 | * Deselect, release chip lock and wake up anyone waiting on the device | |
1da177e4 | 183 | */ |
e0c7d767 | 184 | static void nand_release_device(struct mtd_info *mtd) |
1da177e4 LT |
185 | { |
186 | struct nand_chip *this = mtd->priv; | |
187 | ||
188 | /* De-select the NAND device */ | |
189 | this->select_chip(mtd, -1); | |
0dfc6246 | 190 | |
a36ed299 TG |
191 | /* Release the controller and the chip */ |
192 | spin_lock(&this->controller->lock); | |
193 | this->controller->active = NULL; | |
194 | this->state = FL_READY; | |
195 | wake_up(&this->controller->wq); | |
196 | spin_unlock(&this->controller->lock); | |
1da177e4 LT |
197 | } |
198 | ||
199 | /** | |
200 | * nand_read_byte - [DEFAULT] read one byte from the chip | |
201 | * @mtd: MTD device structure | |
202 | * | |
203 | * Default read function for 8bit buswith | |
204 | */ | |
58dd8f2b | 205 | static uint8_t nand_read_byte(struct mtd_info *mtd) |
1da177e4 LT |
206 | { |
207 | struct nand_chip *this = mtd->priv; | |
208 | return readb(this->IO_ADDR_R); | |
209 | } | |
210 | ||
211 | /** | |
212 | * nand_write_byte - [DEFAULT] write one byte to the chip | |
213 | * @mtd: MTD device structure | |
214 | * @byte: pointer to data byte to write | |
215 | * | |
216 | * Default write function for 8it buswith | |
217 | */ | |
58dd8f2b | 218 | static void nand_write_byte(struct mtd_info *mtd, uint8_t byte) |
1da177e4 LT |
219 | { |
220 | struct nand_chip *this = mtd->priv; | |
221 | writeb(byte, this->IO_ADDR_W); | |
222 | } | |
223 | ||
224 | /** | |
225 | * nand_read_byte16 - [DEFAULT] read one byte endianess aware from the chip | |
226 | * @mtd: MTD device structure | |
227 | * | |
61b03bd7 | 228 | * Default read function for 16bit buswith with |
1da177e4 LT |
229 | * endianess conversion |
230 | */ | |
58dd8f2b | 231 | static uint8_t nand_read_byte16(struct mtd_info *mtd) |
1da177e4 LT |
232 | { |
233 | struct nand_chip *this = mtd->priv; | |
58dd8f2b | 234 | return (uint8_t) cpu_to_le16(readw(this->IO_ADDR_R)); |
1da177e4 LT |
235 | } |
236 | ||
237 | /** | |
238 | * nand_write_byte16 - [DEFAULT] write one byte endianess aware to the chip | |
239 | * @mtd: MTD device structure | |
240 | * @byte: pointer to data byte to write | |
241 | * | |
242 | * Default write function for 16bit buswith with | |
243 | * endianess conversion | |
244 | */ | |
58dd8f2b | 245 | static void nand_write_byte16(struct mtd_info *mtd, uint8_t byte) |
1da177e4 LT |
246 | { |
247 | struct nand_chip *this = mtd->priv; | |
248 | writew(le16_to_cpu((u16) byte), this->IO_ADDR_W); | |
249 | } | |
250 | ||
251 | /** | |
252 | * nand_read_word - [DEFAULT] read one word from the chip | |
253 | * @mtd: MTD device structure | |
254 | * | |
61b03bd7 | 255 | * Default read function for 16bit buswith without |
1da177e4 LT |
256 | * endianess conversion |
257 | */ | |
258 | static u16 nand_read_word(struct mtd_info *mtd) | |
259 | { | |
260 | struct nand_chip *this = mtd->priv; | |
261 | return readw(this->IO_ADDR_R); | |
262 | } | |
263 | ||
264 | /** | |
265 | * nand_write_word - [DEFAULT] write one word to the chip | |
266 | * @mtd: MTD device structure | |
267 | * @word: data word to write | |
268 | * | |
61b03bd7 | 269 | * Default write function for 16bit buswith without |
1da177e4 LT |
270 | * endianess conversion |
271 | */ | |
272 | static void nand_write_word(struct mtd_info *mtd, u16 word) | |
273 | { | |
274 | struct nand_chip *this = mtd->priv; | |
275 | writew(word, this->IO_ADDR_W); | |
276 | } | |
277 | ||
278 | /** | |
279 | * nand_select_chip - [DEFAULT] control CE line | |
280 | * @mtd: MTD device structure | |
281 | * @chip: chipnumber to select, -1 for deselect | |
282 | * | |
283 | * Default select function for 1 chip devices. | |
284 | */ | |
285 | static void nand_select_chip(struct mtd_info *mtd, int chip) | |
286 | { | |
287 | struct nand_chip *this = mtd->priv; | |
e0c7d767 | 288 | switch (chip) { |
1da177e4 | 289 | case -1: |
61b03bd7 | 290 | this->hwcontrol(mtd, NAND_CTL_CLRNCE); |
1da177e4 LT |
291 | break; |
292 | case 0: | |
293 | this->hwcontrol(mtd, NAND_CTL_SETNCE); | |
294 | break; | |
295 | ||
296 | default: | |
297 | BUG(); | |
298 | } | |
299 | } | |
300 | ||
301 | /** | |
302 | * nand_write_buf - [DEFAULT] write buffer to chip | |
303 | * @mtd: MTD device structure | |
304 | * @buf: data buffer | |
305 | * @len: number of bytes to write | |
306 | * | |
307 | * Default write function for 8bit buswith | |
308 | */ | |
58dd8f2b | 309 | static void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) |
1da177e4 LT |
310 | { |
311 | int i; | |
312 | struct nand_chip *this = mtd->priv; | |
313 | ||
e0c7d767 | 314 | for (i = 0; i < len; i++) |
1da177e4 LT |
315 | writeb(buf[i], this->IO_ADDR_W); |
316 | } | |
317 | ||
318 | /** | |
61b03bd7 | 319 | * nand_read_buf - [DEFAULT] read chip data into buffer |
1da177e4 LT |
320 | * @mtd: MTD device structure |
321 | * @buf: buffer to store date | |
322 | * @len: number of bytes to read | |
323 | * | |
324 | * Default read function for 8bit buswith | |
325 | */ | |
58dd8f2b | 326 | static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) |
1da177e4 LT |
327 | { |
328 | int i; | |
329 | struct nand_chip *this = mtd->priv; | |
330 | ||
e0c7d767 | 331 | for (i = 0; i < len; i++) |
1da177e4 LT |
332 | buf[i] = readb(this->IO_ADDR_R); |
333 | } | |
334 | ||
335 | /** | |
61b03bd7 | 336 | * nand_verify_buf - [DEFAULT] Verify chip data against buffer |
1da177e4 LT |
337 | * @mtd: MTD device structure |
338 | * @buf: buffer containing the data to compare | |
339 | * @len: number of bytes to compare | |
340 | * | |
341 | * Default verify function for 8bit buswith | |
342 | */ | |
58dd8f2b | 343 | static int nand_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len) |
1da177e4 LT |
344 | { |
345 | int i; | |
346 | struct nand_chip *this = mtd->priv; | |
347 | ||
e0c7d767 | 348 | for (i = 0; i < len; i++) |
1da177e4 LT |
349 | if (buf[i] != readb(this->IO_ADDR_R)) |
350 | return -EFAULT; | |
351 | ||
352 | return 0; | |
353 | } | |
354 | ||
355 | /** | |
356 | * nand_write_buf16 - [DEFAULT] write buffer to chip | |
357 | * @mtd: MTD device structure | |
358 | * @buf: data buffer | |
359 | * @len: number of bytes to write | |
360 | * | |
361 | * Default write function for 16bit buswith | |
362 | */ | |
58dd8f2b | 363 | static void nand_write_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) |
1da177e4 LT |
364 | { |
365 | int i; | |
366 | struct nand_chip *this = mtd->priv; | |
367 | u16 *p = (u16 *) buf; | |
368 | len >>= 1; | |
61b03bd7 | 369 | |
e0c7d767 | 370 | for (i = 0; i < len; i++) |
1da177e4 | 371 | writew(p[i], this->IO_ADDR_W); |
61b03bd7 | 372 | |
1da177e4 LT |
373 | } |
374 | ||
375 | /** | |
61b03bd7 | 376 | * nand_read_buf16 - [DEFAULT] read chip data into buffer |
1da177e4 LT |
377 | * @mtd: MTD device structure |
378 | * @buf: buffer to store date | |
379 | * @len: number of bytes to read | |
380 | * | |
381 | * Default read function for 16bit buswith | |
382 | */ | |
58dd8f2b | 383 | static void nand_read_buf16(struct mtd_info *mtd, uint8_t *buf, int len) |
1da177e4 LT |
384 | { |
385 | int i; | |
386 | struct nand_chip *this = mtd->priv; | |
387 | u16 *p = (u16 *) buf; | |
388 | len >>= 1; | |
389 | ||
e0c7d767 | 390 | for (i = 0; i < len; i++) |
1da177e4 LT |
391 | p[i] = readw(this->IO_ADDR_R); |
392 | } | |
393 | ||
394 | /** | |
61b03bd7 | 395 | * nand_verify_buf16 - [DEFAULT] Verify chip data against buffer |
1da177e4 LT |
396 | * @mtd: MTD device structure |
397 | * @buf: buffer containing the data to compare | |
398 | * @len: number of bytes to compare | |
399 | * | |
400 | * Default verify function for 16bit buswith | |
401 | */ | |
58dd8f2b | 402 | static int nand_verify_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) |
1da177e4 LT |
403 | { |
404 | int i; | |
405 | struct nand_chip *this = mtd->priv; | |
406 | u16 *p = (u16 *) buf; | |
407 | len >>= 1; | |
408 | ||
e0c7d767 | 409 | for (i = 0; i < len; i++) |
1da177e4 LT |
410 | if (p[i] != readw(this->IO_ADDR_R)) |
411 | return -EFAULT; | |
412 | ||
413 | return 0; | |
414 | } | |
415 | ||
416 | /** | |
417 | * nand_block_bad - [DEFAULT] Read bad block marker from the chip | |
418 | * @mtd: MTD device structure | |
419 | * @ofs: offset from device start | |
420 | * @getchip: 0, if the chip is already selected | |
421 | * | |
61b03bd7 | 422 | * Check, if the block is bad. |
1da177e4 LT |
423 | */ |
424 | static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) | |
425 | { | |
426 | int page, chipnr, res = 0; | |
427 | struct nand_chip *this = mtd->priv; | |
428 | u16 bad; | |
429 | ||
430 | if (getchip) { | |
431 | page = (int)(ofs >> this->page_shift); | |
432 | chipnr = (int)(ofs >> this->chip_shift); | |
433 | ||
434 | /* Grab the lock and see if the device is available */ | |
e0c7d767 | 435 | nand_get_device(this, mtd, FL_READING); |
1da177e4 LT |
436 | |
437 | /* Select the NAND device */ | |
438 | this->select_chip(mtd, chipnr); | |
61b03bd7 | 439 | } else |
e0c7d767 | 440 | page = (int)ofs; |
1da177e4 LT |
441 | |
442 | if (this->options & NAND_BUSWIDTH_16) { | |
2c0a2bed TG |
443 | this->cmdfunc(mtd, NAND_CMD_READOOB, this->badblockpos & 0xFE, |
444 | page & this->pagemask); | |
1da177e4 LT |
445 | bad = cpu_to_le16(this->read_word(mtd)); |
446 | if (this->badblockpos & 0x1) | |
49196f33 | 447 | bad >>= 8; |
1da177e4 LT |
448 | if ((bad & 0xFF) != 0xff) |
449 | res = 1; | |
450 | } else { | |
2c0a2bed TG |
451 | this->cmdfunc(mtd, NAND_CMD_READOOB, this->badblockpos, |
452 | page & this->pagemask); | |
1da177e4 LT |
453 | if (this->read_byte(mtd) != 0xff) |
454 | res = 1; | |
455 | } | |
61b03bd7 | 456 | |
1da177e4 LT |
457 | if (getchip) { |
458 | /* Deselect and wake up anyone waiting on the device */ | |
459 | nand_release_device(mtd); | |
61b03bd7 TG |
460 | } |
461 | ||
1da177e4 LT |
462 | return res; |
463 | } | |
464 | ||
465 | /** | |
466 | * nand_default_block_markbad - [DEFAULT] mark a block bad | |
467 | * @mtd: MTD device structure | |
468 | * @ofs: offset from device start | |
469 | * | |
470 | * This is the default implementation, which can be overridden by | |
471 | * a hardware specific driver. | |
472 | */ | |
473 | static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs) | |
474 | { | |
475 | struct nand_chip *this = mtd->priv; | |
58dd8f2b | 476 | uint8_t buf[2] = { 0, 0 }; |
e0c7d767 | 477 | size_t retlen; |
1da177e4 | 478 | int block; |
61b03bd7 | 479 | |
1da177e4 | 480 | /* Get block number */ |
e0c7d767 | 481 | block = ((int)ofs) >> this->bbt_erase_shift; |
41ce9214 AB |
482 | if (this->bbt) |
483 | this->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1); | |
1da177e4 LT |
484 | |
485 | /* Do we have a flash based bad block table ? */ | |
486 | if (this->options & NAND_USE_FLASH_BBT) | |
e0c7d767 | 487 | return nand_update_bbt(mtd, ofs); |
61b03bd7 | 488 | |
1da177e4 LT |
489 | /* We write two bytes, so we dont have to mess with 16 bit access */ |
490 | ofs += mtd->oobsize + (this->badblockpos & ~0x01); | |
e0c7d767 | 491 | return nand_write_oob(mtd, ofs, 2, &retlen, buf); |
1da177e4 LT |
492 | } |
493 | ||
61b03bd7 | 494 | /** |
1da177e4 LT |
495 | * nand_check_wp - [GENERIC] check if the chip is write protected |
496 | * @mtd: MTD device structure | |
61b03bd7 | 497 | * Check, if the device is write protected |
1da177e4 | 498 | * |
61b03bd7 | 499 | * The function expects, that the device is already selected |
1da177e4 | 500 | */ |
e0c7d767 | 501 | static int nand_check_wp(struct mtd_info *mtd) |
1da177e4 LT |
502 | { |
503 | struct nand_chip *this = mtd->priv; | |
504 | /* Check the WP bit */ | |
e0c7d767 | 505 | this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); |
61b03bd7 | 506 | return (this->read_byte(mtd) & NAND_STATUS_WP) ? 0 : 1; |
1da177e4 LT |
507 | } |
508 | ||
509 | /** | |
510 | * nand_block_checkbad - [GENERIC] Check if a block is marked bad | |
511 | * @mtd: MTD device structure | |
512 | * @ofs: offset from device start | |
513 | * @getchip: 0, if the chip is already selected | |
514 | * @allowbbt: 1, if its allowed to access the bbt area | |
515 | * | |
516 | * Check, if the block is bad. Either by reading the bad block table or | |
517 | * calling of the scan function. | |
518 | */ | |
2c0a2bed TG |
519 | static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, |
520 | int allowbbt) | |
1da177e4 LT |
521 | { |
522 | struct nand_chip *this = mtd->priv; | |
61b03bd7 | 523 | |
1da177e4 LT |
524 | if (!this->bbt) |
525 | return this->block_bad(mtd, ofs, getchip); | |
61b03bd7 | 526 | |
1da177e4 | 527 | /* Return info from the table */ |
e0c7d767 | 528 | return nand_isbad_bbt(mtd, ofs, allowbbt); |
1da177e4 LT |
529 | } |
530 | ||
8fe833c1 RP |
531 | DEFINE_LED_TRIGGER(nand_led_trigger); |
532 | ||
61b03bd7 | 533 | /* |
3b88775c TG |
534 | * Wait for the ready pin, after a command |
535 | * The timeout is catched later. | |
536 | */ | |
537 | static void nand_wait_ready(struct mtd_info *mtd) | |
538 | { | |
539 | struct nand_chip *this = mtd->priv; | |
e0c7d767 | 540 | unsigned long timeo = jiffies + 2; |
3b88775c | 541 | |
8fe833c1 | 542 | led_trigger_event(nand_led_trigger, LED_FULL); |
3b88775c TG |
543 | /* wait until command is processed or timeout occures */ |
544 | do { | |
545 | if (this->dev_ready(mtd)) | |
8fe833c1 | 546 | break; |
8446f1d3 | 547 | touch_softlockup_watchdog(); |
61b03bd7 | 548 | } while (time_before(jiffies, timeo)); |
8fe833c1 | 549 | led_trigger_event(nand_led_trigger, LED_OFF); |
3b88775c TG |
550 | } |
551 | ||
1da177e4 LT |
552 | /** |
553 | * nand_command - [DEFAULT] Send command to NAND device | |
554 | * @mtd: MTD device structure | |
555 | * @command: the command to be sent | |
556 | * @column: the column address for this command, -1 if none | |
557 | * @page_addr: the page address for this command, -1 if none | |
558 | * | |
559 | * Send command to NAND device. This function is used for small page | |
560 | * devices (256/512 Bytes per page) | |
561 | */ | |
2c0a2bed TG |
562 | static void nand_command(struct mtd_info *mtd, unsigned command, int column, |
563 | int page_addr) | |
1da177e4 LT |
564 | { |
565 | register struct nand_chip *this = mtd->priv; | |
566 | ||
567 | /* Begin command latch cycle */ | |
568 | this->hwcontrol(mtd, NAND_CTL_SETCLE); | |
569 | /* | |
570 | * Write out the command to the device. | |
571 | */ | |
572 | if (command == NAND_CMD_SEQIN) { | |
573 | int readcmd; | |
574 | ||
575 | if (column >= mtd->oobblock) { | |
576 | /* OOB area */ | |
577 | column -= mtd->oobblock; | |
578 | readcmd = NAND_CMD_READOOB; | |
579 | } else if (column < 256) { | |
580 | /* First 256 bytes --> READ0 */ | |
581 | readcmd = NAND_CMD_READ0; | |
582 | } else { | |
583 | column -= 256; | |
584 | readcmd = NAND_CMD_READ1; | |
585 | } | |
586 | this->write_byte(mtd, readcmd); | |
587 | } | |
588 | this->write_byte(mtd, command); | |
589 | ||
590 | /* Set ALE and clear CLE to start address cycle */ | |
591 | this->hwcontrol(mtd, NAND_CTL_CLRCLE); | |
592 | ||
593 | if (column != -1 || page_addr != -1) { | |
594 | this->hwcontrol(mtd, NAND_CTL_SETALE); | |
595 | ||
596 | /* Serially input address */ | |
597 | if (column != -1) { | |
598 | /* Adjust columns for 16 bit buswidth */ | |
599 | if (this->options & NAND_BUSWIDTH_16) | |
600 | column >>= 1; | |
601 | this->write_byte(mtd, column); | |
602 | } | |
603 | if (page_addr != -1) { | |
58dd8f2b TG |
604 | this->write_byte(mtd, (uint8_t)(page_addr & 0xff)); |
605 | this->write_byte(mtd, (uint8_t)((page_addr >> 8) & 0xff)); | |
1da177e4 LT |
606 | /* One more address cycle for devices > 32MiB */ |
607 | if (this->chipsize > (32 << 20)) | |
58dd8f2b | 608 | this->write_byte(mtd, (uint8_t)((page_addr >> 16) & 0x0f)); |
1da177e4 LT |
609 | } |
610 | /* Latch in address */ | |
611 | this->hwcontrol(mtd, NAND_CTL_CLRALE); | |
612 | } | |
61b03bd7 TG |
613 | |
614 | /* | |
615 | * program and erase have their own busy handlers | |
1da177e4 | 616 | * status and sequential in needs no delay |
e0c7d767 | 617 | */ |
1da177e4 | 618 | switch (command) { |
61b03bd7 | 619 | |
1da177e4 LT |
620 | case NAND_CMD_PAGEPROG: |
621 | case NAND_CMD_ERASE1: | |
622 | case NAND_CMD_ERASE2: | |
623 | case NAND_CMD_SEQIN: | |
624 | case NAND_CMD_STATUS: | |
625 | return; | |
626 | ||
627 | case NAND_CMD_RESET: | |
61b03bd7 | 628 | if (this->dev_ready) |
1da177e4 LT |
629 | break; |
630 | udelay(this->chip_delay); | |
631 | this->hwcontrol(mtd, NAND_CTL_SETCLE); | |
632 | this->write_byte(mtd, NAND_CMD_STATUS); | |
633 | this->hwcontrol(mtd, NAND_CTL_CLRCLE); | |
e0c7d767 | 634 | while (!(this->read_byte(mtd) & NAND_STATUS_READY)) ; |
1da177e4 LT |
635 | return; |
636 | ||
e0c7d767 | 637 | /* This applies to read commands */ |
1da177e4 | 638 | default: |
61b03bd7 | 639 | /* |
1da177e4 LT |
640 | * If we don't have access to the busy pin, we apply the given |
641 | * command delay | |
e0c7d767 | 642 | */ |
1da177e4 | 643 | if (!this->dev_ready) { |
e0c7d767 | 644 | udelay(this->chip_delay); |
1da177e4 | 645 | return; |
61b03bd7 | 646 | } |
1da177e4 | 647 | } |
1da177e4 LT |
648 | /* Apply this short delay always to ensure that we do wait tWB in |
649 | * any case on any machine. */ | |
e0c7d767 | 650 | ndelay(100); |
3b88775c TG |
651 | |
652 | nand_wait_ready(mtd); | |
1da177e4 LT |
653 | } |
654 | ||
655 | /** | |
656 | * nand_command_lp - [DEFAULT] Send command to NAND large page device | |
657 | * @mtd: MTD device structure | |
658 | * @command: the command to be sent | |
659 | * @column: the column address for this command, -1 if none | |
660 | * @page_addr: the page address for this command, -1 if none | |
661 | * | |
662 | * Send command to NAND device. This is the version for the new large page devices | |
e0c7d767 | 663 | * We dont have the separate regions as we have in the small page devices. |
1da177e4 LT |
664 | * We must emulate NAND_CMD_READOOB to keep the code compatible. |
665 | * | |
666 | */ | |
e0c7d767 | 667 | static void nand_command_lp(struct mtd_info *mtd, unsigned command, int column, int page_addr) |
1da177e4 LT |
668 | { |
669 | register struct nand_chip *this = mtd->priv; | |
670 | ||
671 | /* Emulate NAND_CMD_READOOB */ | |
672 | if (command == NAND_CMD_READOOB) { | |
673 | column += mtd->oobblock; | |
674 | command = NAND_CMD_READ0; | |
675 | } | |
61b03bd7 | 676 | |
1da177e4 LT |
677 | /* Begin command latch cycle */ |
678 | this->hwcontrol(mtd, NAND_CTL_SETCLE); | |
679 | /* Write out the command to the device. */ | |
30f464b7 | 680 | this->write_byte(mtd, (command & 0xff)); |
1da177e4 LT |
681 | /* End command latch cycle */ |
682 | this->hwcontrol(mtd, NAND_CTL_CLRCLE); | |
683 | ||
684 | if (column != -1 || page_addr != -1) { | |
685 | this->hwcontrol(mtd, NAND_CTL_SETALE); | |
686 | ||
687 | /* Serially input address */ | |
688 | if (column != -1) { | |
689 | /* Adjust columns for 16 bit buswidth */ | |
690 | if (this->options & NAND_BUSWIDTH_16) | |
691 | column >>= 1; | |
692 | this->write_byte(mtd, column & 0xff); | |
693 | this->write_byte(mtd, column >> 8); | |
61b03bd7 | 694 | } |
1da177e4 | 695 | if (page_addr != -1) { |
58dd8f2b TG |
696 | this->write_byte(mtd, (uint8_t)(page_addr & 0xff)); |
697 | this->write_byte(mtd, (uint8_t)((page_addr >> 8) & 0xff)); | |
1da177e4 LT |
698 | /* One more address cycle for devices > 128MiB */ |
699 | if (this->chipsize > (128 << 20)) | |
58dd8f2b | 700 | this->write_byte(mtd, (uint8_t)((page_addr >> 16) & 0xff)); |
1da177e4 LT |
701 | } |
702 | /* Latch in address */ | |
703 | this->hwcontrol(mtd, NAND_CTL_CLRALE); | |
704 | } | |
61b03bd7 TG |
705 | |
706 | /* | |
707 | * program and erase have their own busy handlers | |
30f464b7 DM |
708 | * status, sequential in, and deplete1 need no delay |
709 | */ | |
1da177e4 | 710 | switch (command) { |
61b03bd7 | 711 | |
1da177e4 LT |
712 | case NAND_CMD_CACHEDPROG: |
713 | case NAND_CMD_PAGEPROG: | |
714 | case NAND_CMD_ERASE1: | |
715 | case NAND_CMD_ERASE2: | |
716 | case NAND_CMD_SEQIN: | |
717 | case NAND_CMD_STATUS: | |
30f464b7 | 718 | case NAND_CMD_DEPLETE1: |
1da177e4 LT |
719 | return; |
720 | ||
e0c7d767 DW |
721 | /* |
722 | * read error status commands require only a short delay | |
723 | */ | |
30f464b7 DM |
724 | case NAND_CMD_STATUS_ERROR: |
725 | case NAND_CMD_STATUS_ERROR0: | |
726 | case NAND_CMD_STATUS_ERROR1: | |
727 | case NAND_CMD_STATUS_ERROR2: | |
728 | case NAND_CMD_STATUS_ERROR3: | |
729 | udelay(this->chip_delay); | |
730 | return; | |
1da177e4 LT |
731 | |
732 | case NAND_CMD_RESET: | |
61b03bd7 | 733 | if (this->dev_ready) |
1da177e4 LT |
734 | break; |
735 | udelay(this->chip_delay); | |
736 | this->hwcontrol(mtd, NAND_CTL_SETCLE); | |
737 | this->write_byte(mtd, NAND_CMD_STATUS); | |
738 | this->hwcontrol(mtd, NAND_CTL_CLRCLE); | |
e0c7d767 | 739 | while (!(this->read_byte(mtd) & NAND_STATUS_READY)) ; |
1da177e4 LT |
740 | return; |
741 | ||
742 | case NAND_CMD_READ0: | |
743 | /* Begin command latch cycle */ | |
744 | this->hwcontrol(mtd, NAND_CTL_SETCLE); | |
745 | /* Write out the start read command */ | |
746 | this->write_byte(mtd, NAND_CMD_READSTART); | |
747 | /* End command latch cycle */ | |
748 | this->hwcontrol(mtd, NAND_CTL_CLRCLE); | |
749 | /* Fall through into ready check */ | |
61b03bd7 | 750 | |
e0c7d767 | 751 | /* This applies to read commands */ |
1da177e4 | 752 | default: |
61b03bd7 | 753 | /* |
1da177e4 LT |
754 | * If we don't have access to the busy pin, we apply the given |
755 | * command delay | |
e0c7d767 | 756 | */ |
1da177e4 | 757 | if (!this->dev_ready) { |
e0c7d767 | 758 | udelay(this->chip_delay); |
1da177e4 | 759 | return; |
61b03bd7 | 760 | } |
1da177e4 | 761 | } |
3b88775c | 762 | |
1da177e4 LT |
763 | /* Apply this short delay always to ensure that we do wait tWB in |
764 | * any case on any machine. */ | |
e0c7d767 | 765 | ndelay(100); |
3b88775c TG |
766 | |
767 | nand_wait_ready(mtd); | |
1da177e4 LT |
768 | } |
769 | ||
770 | /** | |
771 | * nand_get_device - [GENERIC] Get chip for selected access | |
772 | * @this: the nand chip descriptor | |
773 | * @mtd: MTD device structure | |
61b03bd7 | 774 | * @new_state: the state which is requested |
1da177e4 LT |
775 | * |
776 | * Get the device and lock it for exclusive access | |
777 | */ | |
2c0a2bed TG |
778 | static int |
779 | nand_get_device(struct nand_chip *this, struct mtd_info *mtd, int new_state) | |
1da177e4 | 780 | { |
a36ed299 TG |
781 | spinlock_t *lock = &this->controller->lock; |
782 | wait_queue_head_t *wq = &this->controller->wq; | |
e0c7d767 | 783 | DECLARE_WAITQUEUE(wait, current); |
e0c7d767 | 784 | retry: |
0dfc6246 TG |
785 | spin_lock(lock); |
786 | ||
1da177e4 | 787 | /* Hardware controller shared among independend devices */ |
a36ed299 TG |
788 | /* Hardware controller shared among independend devices */ |
789 | if (!this->controller->active) | |
790 | this->controller->active = this; | |
791 | ||
792 | if (this->controller->active == this && this->state == FL_READY) { | |
0dfc6246 TG |
793 | this->state = new_state; |
794 | spin_unlock(lock); | |
962034f4 VW |
795 | return 0; |
796 | } | |
797 | if (new_state == FL_PM_SUSPENDED) { | |
798 | spin_unlock(lock); | |
799 | return (this->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN; | |
0dfc6246 TG |
800 | } |
801 | set_current_state(TASK_UNINTERRUPTIBLE); | |
802 | add_wait_queue(wq, &wait); | |
803 | spin_unlock(lock); | |
804 | schedule(); | |
805 | remove_wait_queue(wq, &wait); | |
1da177e4 LT |
806 | goto retry; |
807 | } | |
808 | ||
809 | /** | |
810 | * nand_wait - [DEFAULT] wait until the command is done | |
811 | * @mtd: MTD device structure | |
812 | * @this: NAND chip structure | |
813 | * @state: state to select the max. timeout value | |
814 | * | |
815 | * Wait for command done. This applies to erase and program only | |
61b03bd7 | 816 | * Erase can take up to 400ms and program up to 20ms according to |
1da177e4 LT |
817 | * general NAND and SmartMedia specs |
818 | * | |
819 | */ | |
820 | static int nand_wait(struct mtd_info *mtd, struct nand_chip *this, int state) | |
821 | { | |
822 | ||
e0c7d767 DW |
823 | unsigned long timeo = jiffies; |
824 | int status; | |
61b03bd7 | 825 | |
1da177e4 | 826 | if (state == FL_ERASING) |
e0c7d767 | 827 | timeo += (HZ * 400) / 1000; |
1da177e4 | 828 | else |
e0c7d767 | 829 | timeo += (HZ * 20) / 1000; |
1da177e4 | 830 | |
8fe833c1 RP |
831 | led_trigger_event(nand_led_trigger, LED_FULL); |
832 | ||
1da177e4 LT |
833 | /* Apply this short delay always to ensure that we do wait tWB in |
834 | * any case on any machine. */ | |
e0c7d767 | 835 | ndelay(100); |
1da177e4 LT |
836 | |
837 | if ((state == FL_ERASING) && (this->options & NAND_IS_AND)) | |
e0c7d767 | 838 | this->cmdfunc(mtd, NAND_CMD_STATUS_MULTI, -1, -1); |
61b03bd7 | 839 | else |
e0c7d767 | 840 | this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); |
1da177e4 | 841 | |
61b03bd7 | 842 | while (time_before(jiffies, timeo)) { |
1da177e4 LT |
843 | /* Check, if we were interrupted */ |
844 | if (this->state != state) | |
845 | return 0; | |
846 | ||
847 | if (this->dev_ready) { | |
848 | if (this->dev_ready(mtd)) | |
61b03bd7 | 849 | break; |
1da177e4 LT |
850 | } else { |
851 | if (this->read_byte(mtd) & NAND_STATUS_READY) | |
852 | break; | |
853 | } | |
20a6c211 | 854 | cond_resched(); |
1da177e4 | 855 | } |
8fe833c1 RP |
856 | led_trigger_event(nand_led_trigger, LED_OFF); |
857 | ||
e0c7d767 | 858 | status = (int)this->read_byte(mtd); |
1da177e4 LT |
859 | return status; |
860 | } | |
861 | ||
862 | /** | |
863 | * nand_write_page - [GENERIC] write one page | |
864 | * @mtd: MTD device structure | |
865 | * @this: NAND chip structure | |
866 | * @page: startpage inside the chip, must be called with (page & this->pagemask) | |
867 | * @oob_buf: out of band data buffer | |
868 | * @oobsel: out of band selecttion structre | |
869 | * @cached: 1 = enable cached programming if supported by chip | |
870 | * | |
871 | * Nand_page_program function is used for write and writev ! | |
872 | * This function will always program a full page of data | |
873 | * If you call it with a non page aligned buffer, you're lost :) | |
874 | * | |
875 | * Cached programming is not supported yet. | |
876 | */ | |
e0c7d767 | 877 | static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, int page, |
58dd8f2b | 878 | uint8_t *oob_buf, struct nand_oobinfo *oobsel, int cached) |
1da177e4 | 879 | { |
e0c7d767 | 880 | int i, status; |
58dd8f2b | 881 | uint8_t ecc_code[32]; |
e0c7d767 DW |
882 | int eccmode = oobsel->useecc ? this->eccmode : NAND_ECC_NONE; |
883 | int *oob_config = oobsel->eccpos; | |
884 | int datidx = 0, eccidx = 0, eccsteps = this->eccsteps; | |
885 | int eccbytes = 0; | |
61b03bd7 | 886 | |
1da177e4 LT |
887 | /* FIXME: Enable cached programming */ |
888 | cached = 0; | |
61b03bd7 | 889 | |
1da177e4 | 890 | /* Send command to begin auto page programming */ |
e0c7d767 | 891 | this->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page); |
1da177e4 LT |
892 | |
893 | /* Write out complete page of data, take care of eccmode */ | |
894 | switch (eccmode) { | |
e0c7d767 | 895 | /* No ecc, write all */ |
1da177e4 | 896 | case NAND_ECC_NONE: |
e0c7d767 | 897 | printk(KERN_WARNING "Writing data without ECC to NAND-FLASH is not recommended\n"); |
1da177e4 LT |
898 | this->write_buf(mtd, this->data_poi, mtd->oobblock); |
899 | break; | |
61b03bd7 | 900 | |
e0c7d767 | 901 | /* Software ecc 3/256, write all */ |
1da177e4 LT |
902 | case NAND_ECC_SOFT: |
903 | for (; eccsteps; eccsteps--) { | |
904 | this->calculate_ecc(mtd, &this->data_poi[datidx], ecc_code); | |
905 | for (i = 0; i < 3; i++, eccidx++) | |
906 | oob_buf[oob_config[eccidx]] = ecc_code[i]; | |
907 | datidx += this->eccsize; | |
908 | } | |
909 | this->write_buf(mtd, this->data_poi, mtd->oobblock); | |
910 | break; | |
911 | default: | |
912 | eccbytes = this->eccbytes; | |
913 | for (; eccsteps; eccsteps--) { | |
914 | /* enable hardware ecc logic for write */ | |
915 | this->enable_hwecc(mtd, NAND_ECC_WRITE); | |
916 | this->write_buf(mtd, &this->data_poi[datidx], this->eccsize); | |
917 | this->calculate_ecc(mtd, &this->data_poi[datidx], ecc_code); | |
918 | for (i = 0; i < eccbytes; i++, eccidx++) | |
919 | oob_buf[oob_config[eccidx]] = ecc_code[i]; | |
920 | /* If the hardware ecc provides syndromes then | |
921 | * the ecc code must be written immidiately after | |
922 | * the data bytes (words) */ | |
923 | if (this->options & NAND_HWECC_SYNDROME) | |
924 | this->write_buf(mtd, ecc_code, eccbytes); | |
925 | datidx += this->eccsize; | |
926 | } | |
927 | break; | |
928 | } | |
61b03bd7 | 929 | |
1da177e4 LT |
930 | /* Write out OOB data */ |
931 | if (this->options & NAND_HWECC_SYNDROME) | |
932 | this->write_buf(mtd, &oob_buf[oobsel->eccbytes], mtd->oobsize - oobsel->eccbytes); | |
61b03bd7 | 933 | else |
1da177e4 LT |
934 | this->write_buf(mtd, oob_buf, mtd->oobsize); |
935 | ||
936 | /* Send command to actually program the data */ | |
e0c7d767 | 937 | this->cmdfunc(mtd, cached ? NAND_CMD_CACHEDPROG : NAND_CMD_PAGEPROG, -1, -1); |
1da177e4 LT |
938 | |
939 | if (!cached) { | |
940 | /* call wait ready function */ | |
e0c7d767 | 941 | status = this->waitfunc(mtd, this, FL_WRITING); |
068e3c0a DM |
942 | |
943 | /* See if operation failed and additional status checks are available */ | |
944 | if ((status & NAND_STATUS_FAIL) && (this->errstat)) { | |
945 | status = this->errstat(mtd, this, FL_WRITING, status, page); | |
946 | } | |
947 | ||
1da177e4 | 948 | /* See if device thinks it succeeded */ |
a4ab4c5d | 949 | if (status & NAND_STATUS_FAIL) { |
e0c7d767 | 950 | DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write, page 0x%08x, ", __FUNCTION__, page); |
1da177e4 LT |
951 | return -EIO; |
952 | } | |
953 | } else { | |
954 | /* FIXME: Implement cached programming ! */ | |
e0c7d767 | 955 | /* wait until cache is ready */ |
1da177e4 LT |
956 | // status = this->waitfunc (mtd, this, FL_CACHEDRPG); |
957 | } | |
61b03bd7 | 958 | return 0; |
1da177e4 LT |
959 | } |
960 | ||
961 | #ifdef CONFIG_MTD_NAND_VERIFY_WRITE | |
962 | /** | |
963 | * nand_verify_pages - [GENERIC] verify the chip contents after a write | |
964 | * @mtd: MTD device structure | |
965 | * @this: NAND chip structure | |
2c0a2bed | 966 | * @page: startpage inside the chip, must be called with (page & this->pagemask) |
1da177e4 LT |
967 | * @numpages: number of pages to verify |
968 | * @oob_buf: out of band data buffer | |
969 | * @oobsel: out of band selecttion structre | |
970 | * @chipnr: number of the current chip | |
971 | * @oobmode: 1 = full buffer verify, 0 = ecc only | |
972 | * | |
973 | * The NAND device assumes that it is always writing to a cleanly erased page. | |
61b03bd7 | 974 | * Hence, it performs its internal write verification only on bits that |
1da177e4 | 975 | * transitioned from 1 to 0. The device does NOT verify the whole page on a |
61b03bd7 TG |
976 | * byte by byte basis. It is possible that the page was not completely erased |
977 | * or the page is becoming unusable due to wear. The read with ECC would catch | |
978 | * the error later when the ECC page check fails, but we would rather catch | |
1da177e4 LT |
979 | * it early in the page write stage. Better to write no data than invalid data. |
980 | */ | |
e0c7d767 | 981 | static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, int page, int numpages, |
58dd8f2b | 982 | uint8_t *oob_buf, struct nand_oobinfo *oobsel, int chipnr, int oobmode) |
1da177e4 | 983 | { |
e0c7d767 DW |
984 | int i, j, datidx = 0, oobofs = 0, res = -EIO; |
985 | int eccsteps = this->eccsteps; | |
986 | int hweccbytes; | |
58dd8f2b | 987 | uint8_t oobdata[64]; |
1da177e4 LT |
988 | |
989 | hweccbytes = (this->options & NAND_HWECC_SYNDROME) ? (oobsel->eccbytes / eccsteps) : 0; | |
990 | ||
991 | /* Send command to read back the first page */ | |
e0c7d767 | 992 | this->cmdfunc(mtd, NAND_CMD_READ0, 0, page); |
1da177e4 | 993 | |
e0c7d767 | 994 | for (;;) { |
1da177e4 LT |
995 | for (j = 0; j < eccsteps; j++) { |
996 | /* Loop through and verify the data */ | |
997 | if (this->verify_buf(mtd, &this->data_poi[datidx], mtd->eccsize)) { | |
e0c7d767 | 998 | DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page); |
1da177e4 LT |
999 | goto out; |
1000 | } | |
1001 | datidx += mtd->eccsize; | |
1002 | /* Have we a hw generator layout ? */ | |
1003 | if (!hweccbytes) | |
1004 | continue; | |
1005 | if (this->verify_buf(mtd, &this->oob_buf[oobofs], hweccbytes)) { | |
e0c7d767 | 1006 | DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page); |
1da177e4 LT |
1007 | goto out; |
1008 | } | |
1009 | oobofs += hweccbytes; | |
1010 | } | |
1011 | ||
1012 | /* check, if we must compare all data or if we just have to | |
1013 | * compare the ecc bytes | |
1014 | */ | |
1015 | if (oobmode) { | |
1016 | if (this->verify_buf(mtd, &oob_buf[oobofs], mtd->oobsize - hweccbytes * eccsteps)) { | |
e0c7d767 | 1017 | DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page); |
1da177e4 LT |
1018 | goto out; |
1019 | } | |
1020 | } else { | |
1021 | /* Read always, else autoincrement fails */ | |
1022 | this->read_buf(mtd, oobdata, mtd->oobsize - hweccbytes * eccsteps); | |
1023 | ||
1024 | if (oobsel->useecc != MTD_NANDECC_OFF && !hweccbytes) { | |
1025 | int ecccnt = oobsel->eccbytes; | |
61b03bd7 | 1026 | |
1da177e4 LT |
1027 | for (i = 0; i < ecccnt; i++) { |
1028 | int idx = oobsel->eccpos[i]; | |
e0c7d767 DW |
1029 | if (oobdata[idx] != oob_buf[oobofs + idx]) { |
1030 | DEBUG(MTD_DEBUG_LEVEL0, "%s: Failed ECC write verify, page 0x%08x, %6i bytes were succesful\n", | |
1031 | __FUNCTION__, page, i); | |
1da177e4 LT |
1032 | goto out; |
1033 | } | |
1034 | } | |
61b03bd7 | 1035 | } |
1da177e4 LT |
1036 | } |
1037 | oobofs += mtd->oobsize - hweccbytes * eccsteps; | |
1038 | page++; | |
1039 | numpages--; | |
1040 | ||
61b03bd7 | 1041 | /* Apply delay or wait for ready/busy pin |
1da177e4 LT |
1042 | * Do this before the AUTOINCR check, so no problems |
1043 | * arise if a chip which does auto increment | |
1044 | * is marked as NOAUTOINCR by the board driver. | |
1045 | * Do this also before returning, so the chip is | |
1046 | * ready for the next command. | |
e0c7d767 | 1047 | */ |
61b03bd7 | 1048 | if (!this->dev_ready) |
e0c7d767 | 1049 | udelay(this->chip_delay); |
1da177e4 | 1050 | else |
3b88775c | 1051 | nand_wait_ready(mtd); |
1da177e4 LT |
1052 | |
1053 | /* All done, return happy */ | |
1054 | if (!numpages) | |
1055 | return 0; | |
61b03bd7 | 1056 | |
61b03bd7 | 1057 | /* Check, if the chip supports auto page increment */ |
1da177e4 | 1058 | if (!NAND_CANAUTOINCR(this)) |
e0c7d767 | 1059 | this->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page); |
1da177e4 | 1060 | } |
61b03bd7 | 1061 | /* |
1da177e4 LT |
1062 | * Terminate the read command. We come here in case of an error |
1063 | * So we must issue a reset command. | |
1064 | */ | |
e0c7d767 DW |
1065 | out: |
1066 | this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); | |
1da177e4 LT |
1067 | return res; |
1068 | } | |
1069 | #endif | |
1070 | ||
1071 | /** | |
068e3c0a | 1072 | * nand_read - [MTD Interface] MTD compability function for nand_do_read_ecc |
1da177e4 LT |
1073 | * @mtd: MTD device structure |
1074 | * @from: offset to read from | |
1075 | * @len: number of bytes to read | |
1076 | * @retlen: pointer to variable to store the number of read bytes | |
1077 | * @buf: the databuffer to put data | |
1078 | * | |
068e3c0a DM |
1079 | * This function simply calls nand_do_read_ecc with oob buffer and oobsel = NULL |
1080 | * and flags = 0xff | |
1081 | */ | |
58dd8f2b | 1082 | static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, uint8_t *buf) |
1da177e4 | 1083 | { |
e0c7d767 | 1084 | return nand_do_read_ecc(mtd, from, len, retlen, buf, NULL, &mtd->oobinfo, 0xff); |
22c60f5f | 1085 | } |
1da177e4 | 1086 | |
1da177e4 | 1087 | /** |
068e3c0a | 1088 | * nand_read_ecc - [MTD Interface] MTD compability function for nand_do_read_ecc |
1da177e4 LT |
1089 | * @mtd: MTD device structure |
1090 | * @from: offset to read from | |
1091 | * @len: number of bytes to read | |
1092 | * @retlen: pointer to variable to store the number of read bytes | |
1093 | * @buf: the databuffer to put data | |
1094 | * @oob_buf: filesystem supplied oob data buffer | |
1095 | * @oobsel: oob selection structure | |
1096 | * | |
068e3c0a | 1097 | * This function simply calls nand_do_read_ecc with flags = 0xff |
1da177e4 | 1098 | */ |
e0c7d767 | 1099 | static int nand_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, |
58dd8f2b | 1100 | size_t *retlen, uint8_t *buf, uint8_t *oob_buf, struct nand_oobinfo *oobsel) |
068e3c0a | 1101 | { |
22c60f5f TG |
1102 | /* use userspace supplied oobinfo, if zero */ |
1103 | if (oobsel == NULL) | |
1104 | oobsel = &mtd->oobinfo; | |
068e3c0a DM |
1105 | return nand_do_read_ecc(mtd, from, len, retlen, buf, oob_buf, oobsel, 0xff); |
1106 | } | |
1107 | ||
068e3c0a DM |
1108 | /** |
1109 | * nand_do_read_ecc - [MTD Interface] Read data with ECC | |
1110 | * @mtd: MTD device structure | |
1111 | * @from: offset to read from | |
1112 | * @len: number of bytes to read | |
1113 | * @retlen: pointer to variable to store the number of read bytes | |
1114 | * @buf: the databuffer to put data | |
bb75ba4c | 1115 | * @oob_buf: filesystem supplied oob data buffer (can be NULL) |
22c60f5f | 1116 | * @oobsel: oob selection structure |
068e3c0a DM |
1117 | * @flags: flag to indicate if nand_get_device/nand_release_device should be preformed |
1118 | * and how many corrected error bits are acceptable: | |
1119 | * bits 0..7 - number of tolerable errors | |
1120 | * bit 8 - 0 == do not get/release chip, 1 == get/release chip | |
1121 | * | |
1122 | * NAND read with ECC | |
1123 | */ | |
e0c7d767 | 1124 | int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, |
58dd8f2b | 1125 | size_t *retlen, uint8_t *buf, uint8_t *oob_buf, struct nand_oobinfo *oobsel, int flags) |
1da177e4 | 1126 | { |
22c60f5f | 1127 | |
1da177e4 LT |
1128 | int i, j, col, realpage, page, end, ecc, chipnr, sndcmd = 1; |
1129 | int read = 0, oob = 0, ecc_status = 0, ecc_failed = 0; | |
1130 | struct nand_chip *this = mtd->priv; | |
58dd8f2b TG |
1131 | uint8_t *data_poi, *oob_data = oob_buf; |
1132 | uint8_t ecc_calc[32]; | |
1133 | uint8_t ecc_code[32]; | |
e0c7d767 DW |
1134 | int eccmode, eccsteps; |
1135 | int *oob_config, datidx; | |
1136 | int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1; | |
1137 | int eccbytes; | |
1138 | int compareecc = 1; | |
1139 | int oobreadlen; | |
1da177e4 | 1140 | |
e0c7d767 | 1141 | DEBUG(MTD_DEBUG_LEVEL3, "nand_read_ecc: from = 0x%08x, len = %i\n", (unsigned int)from, (int)len); |
1da177e4 LT |
1142 | |
1143 | /* Do not allow reads past end of device */ | |
1144 | if ((from + len) > mtd->size) { | |
e0c7d767 | 1145 | DEBUG(MTD_DEBUG_LEVEL0, "nand_read_ecc: Attempt read beyond end of device\n"); |
1da177e4 LT |
1146 | *retlen = 0; |
1147 | return -EINVAL; | |
1148 | } | |
1149 | ||
1150 | /* Grab the lock and see if the device is available */ | |
068e3c0a | 1151 | if (flags & NAND_GET_DEVICE) |
e0c7d767 | 1152 | nand_get_device(this, mtd, FL_READING); |
1da177e4 | 1153 | |
1da177e4 LT |
1154 | /* Autoplace of oob data ? Use the default placement scheme */ |
1155 | if (oobsel->useecc == MTD_NANDECC_AUTOPLACE) | |
1156 | oobsel = this->autooob; | |
61b03bd7 | 1157 | |
1da177e4 LT |
1158 | eccmode = oobsel->useecc ? this->eccmode : NAND_ECC_NONE; |
1159 | oob_config = oobsel->eccpos; | |
1160 | ||
1161 | /* Select the NAND device */ | |
1162 | chipnr = (int)(from >> this->chip_shift); | |
1163 | this->select_chip(mtd, chipnr); | |
1164 | ||
1165 | /* First we calculate the starting page */ | |
e0c7d767 | 1166 | realpage = (int)(from >> this->page_shift); |
1da177e4 LT |
1167 | page = realpage & this->pagemask; |
1168 | ||
1169 | /* Get raw starting column */ | |
1170 | col = from & (mtd->oobblock - 1); | |
1171 | ||
1172 | end = mtd->oobblock; | |
1173 | ecc = this->eccsize; | |
1174 | eccbytes = this->eccbytes; | |
61b03bd7 | 1175 | |
1da177e4 LT |
1176 | if ((eccmode == NAND_ECC_NONE) || (this->options & NAND_HWECC_SYNDROME)) |
1177 | compareecc = 0; | |
1178 | ||
1179 | oobreadlen = mtd->oobsize; | |
61b03bd7 | 1180 | if (this->options & NAND_HWECC_SYNDROME) |
1da177e4 LT |
1181 | oobreadlen -= oobsel->eccbytes; |
1182 | ||
1183 | /* Loop until all data read */ | |
1184 | while (read < len) { | |
61b03bd7 | 1185 | |
1da177e4 | 1186 | int aligned = (!col && (len - read) >= end); |
61b03bd7 | 1187 | /* |
1da177e4 LT |
1188 | * If the read is not page aligned, we have to read into data buffer |
1189 | * due to ecc, else we read into return buffer direct | |
1190 | */ | |
1191 | if (aligned) | |
1192 | data_poi = &buf[read]; | |
61b03bd7 | 1193 | else |
1da177e4 | 1194 | data_poi = this->data_buf; |
61b03bd7 TG |
1195 | |
1196 | /* Check, if we have this page in the buffer | |
1da177e4 LT |
1197 | * |
1198 | * FIXME: Make it work when we must provide oob data too, | |
1199 | * check the usage of data_buf oob field | |
1200 | */ | |
1201 | if (realpage == this->pagebuf && !oob_buf) { | |
1202 | /* aligned read ? */ | |
1203 | if (aligned) | |
e0c7d767 | 1204 | memcpy(data_poi, this->data_buf, end); |
1da177e4 LT |
1205 | goto readdata; |
1206 | } | |
1207 | ||
1208 | /* Check, if we must send the read command */ | |
1209 | if (sndcmd) { | |
e0c7d767 | 1210 | this->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page); |
1da177e4 | 1211 | sndcmd = 0; |
61b03bd7 | 1212 | } |
1da177e4 LT |
1213 | |
1214 | /* get oob area, if we have no oob buffer from fs-driver */ | |
90e260c8 TG |
1215 | if (!oob_buf || oobsel->useecc == MTD_NANDECC_AUTOPLACE || |
1216 | oobsel->useecc == MTD_NANDECC_AUTOPL_USR) | |
1da177e4 LT |
1217 | oob_data = &this->data_buf[end]; |
1218 | ||
1219 | eccsteps = this->eccsteps; | |
61b03bd7 | 1220 | |
1da177e4 | 1221 | switch (eccmode) { |
e0c7d767 DW |
1222 | case NAND_ECC_NONE:{ |
1223 | /* No ECC, Read in a page */ | |
1224 | static unsigned long lastwhinge = 0; | |
1225 | if ((lastwhinge / HZ) != (jiffies / HZ)) { | |
1226 | printk(KERN_WARNING | |
1227 | "Reading data from NAND FLASH without ECC is not recommended\n"); | |
1228 | lastwhinge = jiffies; | |
1229 | } | |
1230 | this->read_buf(mtd, data_poi, end); | |
1231 | break; | |
1da177e4 | 1232 | } |
61b03bd7 | 1233 | |
1da177e4 LT |
1234 | case NAND_ECC_SOFT: /* Software ECC 3/256: Read in a page + oob data */ |
1235 | this->read_buf(mtd, data_poi, end); | |
e0c7d767 | 1236 | for (i = 0, datidx = 0; eccsteps; eccsteps--, i += 3, datidx += ecc) |
1da177e4 | 1237 | this->calculate_ecc(mtd, &data_poi[datidx], &ecc_calc[i]); |
61b03bd7 | 1238 | break; |
1da177e4 LT |
1239 | |
1240 | default: | |
e0c7d767 | 1241 | for (i = 0, datidx = 0; eccsteps; eccsteps--, i += eccbytes, datidx += ecc) { |
1da177e4 LT |
1242 | this->enable_hwecc(mtd, NAND_ECC_READ); |
1243 | this->read_buf(mtd, &data_poi[datidx], ecc); | |
1244 | ||
1245 | /* HW ecc with syndrome calculation must read the | |
1246 | * syndrome from flash immidiately after the data */ | |
1247 | if (!compareecc) { | |
1248 | /* Some hw ecc generators need to know when the | |
1249 | * syndrome is read from flash */ | |
1250 | this->enable_hwecc(mtd, NAND_ECC_READSYN); | |
1251 | this->read_buf(mtd, &oob_data[i], eccbytes); | |
1252 | /* We calc error correction directly, it checks the hw | |
1253 | * generator for an error, reads back the syndrome and | |
1254 | * does the error correction on the fly */ | |
068e3c0a DM |
1255 | ecc_status = this->correct_data(mtd, &data_poi[datidx], &oob_data[i], &ecc_code[i]); |
1256 | if ((ecc_status == -1) || (ecc_status > (flags && 0xff))) { | |
e0c7d767 DW |
1257 | DEBUG(MTD_DEBUG_LEVEL0, "nand_read_ecc: " |
1258 | "Failed ECC read, page 0x%08x on chip %d\n", page, chipnr); | |
1da177e4 LT |
1259 | ecc_failed++; |
1260 | } | |
1261 | } else { | |
1262 | this->calculate_ecc(mtd, &data_poi[datidx], &ecc_calc[i]); | |
61b03bd7 | 1263 | } |
1da177e4 | 1264 | } |
61b03bd7 | 1265 | break; |
1da177e4 LT |
1266 | } |
1267 | ||
1268 | /* read oobdata */ | |
1269 | this->read_buf(mtd, &oob_data[mtd->oobsize - oobreadlen], oobreadlen); | |
1270 | ||
1271 | /* Skip ECC check, if not requested (ECC_NONE or HW_ECC with syndromes) */ | |
1272 | if (!compareecc) | |
61b03bd7 TG |
1273 | goto readoob; |
1274 | ||
1da177e4 LT |
1275 | /* Pick the ECC bytes out of the oob data */ |
1276 | for (j = 0; j < oobsel->eccbytes; j++) | |
1277 | ecc_code[j] = oob_data[oob_config[j]]; | |
1278 | ||
e0c7d767 | 1279 | /* correct data, if necessary */ |
1da177e4 LT |
1280 | for (i = 0, j = 0, datidx = 0; i < this->eccsteps; i++, datidx += ecc) { |
1281 | ecc_status = this->correct_data(mtd, &data_poi[datidx], &ecc_code[j], &ecc_calc[j]); | |
61b03bd7 | 1282 | |
1da177e4 LT |
1283 | /* Get next chunk of ecc bytes */ |
1284 | j += eccbytes; | |
61b03bd7 TG |
1285 | |
1286 | /* Check, if we have a fs supplied oob-buffer, | |
1da177e4 LT |
1287 | * This is the legacy mode. Used by YAFFS1 |
1288 | * Should go away some day | |
1289 | */ | |
61b03bd7 | 1290 | if (oob_buf && oobsel->useecc == MTD_NANDECC_PLACE) { |
1da177e4 LT |
1291 | int *p = (int *)(&oob_data[mtd->oobsize]); |
1292 | p[i] = ecc_status; | |
1293 | } | |
61b03bd7 TG |
1294 | |
1295 | if ((ecc_status == -1) || (ecc_status > (flags && 0xff))) { | |
e0c7d767 | 1296 | DEBUG(MTD_DEBUG_LEVEL0, "nand_read_ecc: " "Failed ECC read, page 0x%08x\n", page); |
1da177e4 LT |
1297 | ecc_failed++; |
1298 | } | |
61b03bd7 | 1299 | } |
1da177e4 | 1300 | |
e0c7d767 | 1301 | readoob: |
1da177e4 LT |
1302 | /* check, if we have a fs supplied oob-buffer */ |
1303 | if (oob_buf) { | |
1304 | /* without autoplace. Legacy mode used by YAFFS1 */ | |
e0c7d767 | 1305 | switch (oobsel->useecc) { |
1da177e4 | 1306 | case MTD_NANDECC_AUTOPLACE: |
90e260c8 | 1307 | case MTD_NANDECC_AUTOPL_USR: |
1da177e4 | 1308 | /* Walk through the autoplace chunks */ |
82e1d19f | 1309 | for (i = 0; oobsel->oobfree[i][1]; i++) { |
1da177e4 LT |
1310 | int from = oobsel->oobfree[i][0]; |
1311 | int num = oobsel->oobfree[i][1]; | |
1312 | memcpy(&oob_buf[oob], &oob_data[from], num); | |
82e1d19f | 1313 | oob += num; |
1da177e4 | 1314 | } |
1da177e4 LT |
1315 | break; |
1316 | case MTD_NANDECC_PLACE: | |
1317 | /* YAFFS1 legacy mode */ | |
e0c7d767 | 1318 | oob_data += this->eccsteps * sizeof(int); |
1da177e4 LT |
1319 | default: |
1320 | oob_data += mtd->oobsize; | |
1321 | } | |
1322 | } | |
1323 | readdata: | |
1324 | /* Partial page read, transfer data into fs buffer */ | |
61b03bd7 | 1325 | if (!aligned) { |
1da177e4 LT |
1326 | for (j = col; j < end && read < len; j++) |
1327 | buf[read++] = data_poi[j]; | |
61b03bd7 TG |
1328 | this->pagebuf = realpage; |
1329 | } else | |
1da177e4 LT |
1330 | read += mtd->oobblock; |
1331 | ||
61b03bd7 | 1332 | /* Apply delay or wait for ready/busy pin |
1da177e4 LT |
1333 | * Do this before the AUTOINCR check, so no problems |
1334 | * arise if a chip which does auto increment | |
1335 | * is marked as NOAUTOINCR by the board driver. | |
e0c7d767 | 1336 | */ |
61b03bd7 | 1337 | if (!this->dev_ready) |
e0c7d767 | 1338 | udelay(this->chip_delay); |
1da177e4 | 1339 | else |
3b88775c | 1340 | nand_wait_ready(mtd); |
61b03bd7 | 1341 | |
1da177e4 | 1342 | if (read == len) |
61b03bd7 | 1343 | break; |
1da177e4 LT |
1344 | |
1345 | /* For subsequent reads align to page boundary. */ | |
1346 | col = 0; | |
1347 | /* Increment page address */ | |
1348 | realpage++; | |
1349 | ||
1350 | page = realpage & this->pagemask; | |
1351 | /* Check, if we cross a chip boundary */ | |
1352 | if (!page) { | |
1353 | chipnr++; | |
1354 | this->select_chip(mtd, -1); | |
1355 | this->select_chip(mtd, chipnr); | |
1356 | } | |
61b03bd7 TG |
1357 | /* Check, if the chip supports auto page increment |
1358 | * or if we have hit a block boundary. | |
e0c7d767 | 1359 | */ |
1da177e4 | 1360 | if (!NAND_CANAUTOINCR(this) || !(page & blockcheck)) |
61b03bd7 | 1361 | sndcmd = 1; |
1da177e4 LT |
1362 | } |
1363 | ||
1364 | /* Deselect and wake up anyone waiting on the device */ | |
068e3c0a DM |
1365 | if (flags & NAND_GET_DEVICE) |
1366 | nand_release_device(mtd); | |
1da177e4 LT |
1367 | |
1368 | /* | |
1369 | * Return success, if no ECC failures, else -EBADMSG | |
1370 | * fs driver will take care of that, because | |
1371 | * retlen == desired len and result == -EBADMSG | |
1372 | */ | |
1373 | *retlen = read; | |
1374 | return ecc_failed ? -EBADMSG : 0; | |
1375 | } | |
1376 | ||
1377 | /** | |
1378 | * nand_read_oob - [MTD Interface] NAND read out-of-band | |
1379 | * @mtd: MTD device structure | |
1380 | * @from: offset to read from | |
1381 | * @len: number of bytes to read | |
1382 | * @retlen: pointer to variable to store the number of read bytes | |
1383 | * @buf: the databuffer to put data | |
1384 | * | |
1385 | * NAND read out-of-band data from the spare area | |
1386 | */ | |
58dd8f2b | 1387 | static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, uint8_t *buf) |
1da177e4 LT |
1388 | { |
1389 | int i, col, page, chipnr; | |
1390 | struct nand_chip *this = mtd->priv; | |
e0c7d767 | 1391 | int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1; |
1da177e4 | 1392 | |
e0c7d767 | 1393 | DEBUG(MTD_DEBUG_LEVEL3, "nand_read_oob: from = 0x%08x, len = %i\n", (unsigned int)from, (int)len); |
1da177e4 LT |
1394 | |
1395 | /* Shift to get page */ | |
1396 | page = (int)(from >> this->page_shift); | |
1397 | chipnr = (int)(from >> this->chip_shift); | |
61b03bd7 | 1398 | |
1da177e4 LT |
1399 | /* Mask to get column */ |
1400 | col = from & (mtd->oobsize - 1); | |
1401 | ||
1402 | /* Initialize return length value */ | |
1403 | *retlen = 0; | |
1404 | ||
1405 | /* Do not allow reads past end of device */ | |
1406 | if ((from + len) > mtd->size) { | |
e0c7d767 | 1407 | DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: Attempt read beyond end of device\n"); |
1da177e4 LT |
1408 | *retlen = 0; |
1409 | return -EINVAL; | |
1410 | } | |
1411 | ||
1412 | /* Grab the lock and see if the device is available */ | |
e0c7d767 | 1413 | nand_get_device(this, mtd, FL_READING); |
1da177e4 LT |
1414 | |
1415 | /* Select the NAND device */ | |
1416 | this->select_chip(mtd, chipnr); | |
1417 | ||
1418 | /* Send the read command */ | |
e0c7d767 | 1419 | this->cmdfunc(mtd, NAND_CMD_READOOB, col, page & this->pagemask); |
61b03bd7 | 1420 | /* |
1da177e4 LT |
1421 | * Read the data, if we read more than one page |
1422 | * oob data, let the device transfer the data ! | |
1423 | */ | |
1424 | i = 0; | |
1425 | while (i < len) { | |
1426 | int thislen = mtd->oobsize - col; | |
1427 | thislen = min_t(int, thislen, len); | |
1428 | this->read_buf(mtd, &buf[i], thislen); | |
1429 | i += thislen; | |
1da177e4 LT |
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 | } | |
61b03bd7 TG |
1442 | |
1443 | /* Apply delay or wait for ready/busy pin | |
19870da7 TG |
1444 | * Do this before the AUTOINCR check, so no problems |
1445 | * arise if a chip which does auto increment | |
1446 | * is marked as NOAUTOINCR by the board driver. | |
1447 | */ | |
61b03bd7 | 1448 | if (!this->dev_ready) |
e0c7d767 | 1449 | udelay(this->chip_delay); |
19870da7 TG |
1450 | else |
1451 | nand_wait_ready(mtd); | |
1452 | ||
61b03bd7 TG |
1453 | /* Check, if the chip supports auto page increment |
1454 | * or if we have hit a block boundary. | |
e0c7d767 | 1455 | */ |
1da177e4 LT |
1456 | if (!NAND_CANAUTOINCR(this) || !(page & blockcheck)) { |
1457 | /* For subsequent page reads set offset to 0 */ | |
e0c7d767 | 1458 | this->cmdfunc(mtd, NAND_CMD_READOOB, 0x0, page & this->pagemask); |
1da177e4 LT |
1459 | } |
1460 | } | |
1461 | } | |
1462 | ||
1463 | /* Deselect and wake up anyone waiting on the device */ | |
1464 | nand_release_device(mtd); | |
1465 | ||
1466 | /* Return happy */ | |
1467 | *retlen = len; | |
1468 | return 0; | |
1469 | } | |
1470 | ||
1471 | /** | |
1472 | * nand_read_raw - [GENERIC] Read raw data including oob into buffer | |
1473 | * @mtd: MTD device structure | |
1474 | * @buf: temporary buffer | |
1475 | * @from: offset to read from | |
1476 | * @len: number of bytes to read | |
1477 | * @ooblen: number of oob data bytes to read | |
1478 | * | |
1479 | * Read raw data including oob into buffer | |
1480 | */ | |
e0c7d767 | 1481 | int nand_read_raw(struct mtd_info *mtd, uint8_t *buf, loff_t from, size_t len, size_t ooblen) |
1da177e4 LT |
1482 | { |
1483 | struct nand_chip *this = mtd->priv; | |
e0c7d767 DW |
1484 | int page = (int)(from >> this->page_shift); |
1485 | int chip = (int)(from >> this->chip_shift); | |
1da177e4 LT |
1486 | int sndcmd = 1; |
1487 | int cnt = 0; | |
1488 | int pagesize = mtd->oobblock + mtd->oobsize; | |
e0c7d767 | 1489 | int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1; |
1da177e4 LT |
1490 | |
1491 | /* Do not allow reads past end of device */ | |
1492 | if ((from + len) > mtd->size) { | |
e0c7d767 | 1493 | DEBUG(MTD_DEBUG_LEVEL0, "nand_read_raw: Attempt read beyond end of device\n"); |
1da177e4 LT |
1494 | return -EINVAL; |
1495 | } | |
1496 | ||
1497 | /* Grab the lock and see if the device is available */ | |
e0c7d767 | 1498 | nand_get_device(this, mtd, FL_READING); |
1da177e4 | 1499 | |
e0c7d767 | 1500 | this->select_chip(mtd, chip); |
61b03bd7 | 1501 | |
1da177e4 LT |
1502 | /* Add requested oob length */ |
1503 | len += ooblen; | |
61b03bd7 | 1504 | |
1da177e4 LT |
1505 | while (len) { |
1506 | if (sndcmd) | |
e0c7d767 | 1507 | this->cmdfunc(mtd, NAND_CMD_READ0, 0, page & this->pagemask); |
61b03bd7 | 1508 | sndcmd = 0; |
1da177e4 | 1509 | |
e0c7d767 | 1510 | this->read_buf(mtd, &buf[cnt], pagesize); |
1da177e4 LT |
1511 | |
1512 | len -= pagesize; | |
1513 | cnt += pagesize; | |
1514 | page++; | |
61b03bd7 TG |
1515 | |
1516 | if (!this->dev_ready) | |
e0c7d767 | 1517 | udelay(this->chip_delay); |
1da177e4 | 1518 | else |
3b88775c | 1519 | nand_wait_ready(mtd); |
61b03bd7 TG |
1520 | |
1521 | /* Check, if the chip supports auto page increment */ | |
1da177e4 LT |
1522 | if (!NAND_CANAUTOINCR(this) || !(page & blockcheck)) |
1523 | sndcmd = 1; | |
1524 | } | |
1525 | ||
1526 | /* Deselect and wake up anyone waiting on the device */ | |
1527 | nand_release_device(mtd); | |
1528 | return 0; | |
1529 | } | |
1530 | ||
61b03bd7 TG |
1531 | /** |
1532 | * nand_prepare_oobbuf - [GENERIC] Prepare the out of band buffer | |
1da177e4 LT |
1533 | * @mtd: MTD device structure |
1534 | * @fsbuf: buffer given by fs driver | |
1535 | * @oobsel: out of band selection structre | |
1536 | * @autoplace: 1 = place given buffer into the oob bytes | |
1537 | * @numpages: number of pages to prepare | |
1538 | * | |
1539 | * Return: | |
1540 | * 1. Filesystem buffer available and autoplacement is off, | |
1541 | * return filesystem buffer | |
1542 | * 2. No filesystem buffer or autoplace is off, return internal | |
1543 | * buffer | |
1544 | * 3. Filesystem buffer is given and autoplace selected | |
1545 | * put data from fs buffer into internal buffer and | |
1546 | * retrun internal buffer | |
1547 | * | |
1548 | * Note: The internal buffer is filled with 0xff. This must | |
1549 | * be done only once, when no autoplacement happens | |
1550 | * Autoplacement sets the buffer dirty flag, which | |
1551 | * forces the 0xff fill before using the buffer again. | |
1552 | * | |
1553 | */ | |
58dd8f2b | 1554 | static uint8_t *nand_prepare_oobbuf(struct mtd_info *mtd, uint8_t *fsbuf, struct nand_oobinfo *oobsel, |
e0c7d767 | 1555 | int autoplace, int numpages) |
1da177e4 LT |
1556 | { |
1557 | struct nand_chip *this = mtd->priv; | |
1558 | int i, len, ofs; | |
1559 | ||
1560 | /* Zero copy fs supplied buffer */ | |
61b03bd7 | 1561 | if (fsbuf && !autoplace) |
1da177e4 LT |
1562 | return fsbuf; |
1563 | ||
1564 | /* Check, if the buffer must be filled with ff again */ | |
61b03bd7 | 1565 | if (this->oobdirty) { |
e0c7d767 | 1566 | memset(this->oob_buf, 0xff, mtd->oobsize << (this->phys_erase_shift - this->page_shift)); |
1da177e4 | 1567 | this->oobdirty = 0; |
61b03bd7 TG |
1568 | } |
1569 | ||
1da177e4 LT |
1570 | /* If we have no autoplacement or no fs buffer use the internal one */ |
1571 | if (!autoplace || !fsbuf) | |
1572 | return this->oob_buf; | |
61b03bd7 | 1573 | |
1da177e4 LT |
1574 | /* Walk through the pages and place the data */ |
1575 | this->oobdirty = 1; | |
1576 | ofs = 0; | |
1577 | while (numpages--) { | |
1578 | for (i = 0, len = 0; len < mtd->oobavail; i++) { | |
1579 | int to = ofs + oobsel->oobfree[i][0]; | |
1580 | int num = oobsel->oobfree[i][1]; | |
e0c7d767 | 1581 | memcpy(&this->oob_buf[to], fsbuf, num); |
1da177e4 LT |
1582 | len += num; |
1583 | fsbuf += num; | |
1584 | } | |
1585 | ofs += mtd->oobavail; | |
1586 | } | |
1587 | return this->oob_buf; | |
1588 | } | |
1589 | ||
1590 | #define NOTALIGNED(x) (x & (mtd->oobblock-1)) != 0 | |
1591 | ||
1592 | /** | |
1593 | * nand_write - [MTD Interface] compability function for nand_write_ecc | |
1594 | * @mtd: MTD device structure | |
1595 | * @to: offset to write to | |
1596 | * @len: number of bytes to write | |
1597 | * @retlen: pointer to variable to store the number of written bytes | |
1598 | * @buf: the data to write | |
1599 | * | |
1600 | * This function simply calls nand_write_ecc with oob buffer and oobsel = NULL | |
1601 | * | |
1602 | */ | |
58dd8f2b | 1603 | static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const uint8_t *buf) |
1da177e4 | 1604 | { |
e0c7d767 | 1605 | return (nand_write_ecc(mtd, to, len, retlen, buf, NULL, NULL)); |
1da177e4 | 1606 | } |
61b03bd7 | 1607 | |
1da177e4 LT |
1608 | /** |
1609 | * nand_write_ecc - [MTD Interface] NAND write with ECC | |
1610 | * @mtd: MTD device structure | |
1611 | * @to: offset to write to | |
1612 | * @len: number of bytes to write | |
1613 | * @retlen: pointer to variable to store the number of written bytes | |
1614 | * @buf: the data to write | |
1615 | * @eccbuf: filesystem supplied oob data buffer | |
1616 | * @oobsel: oob selection structure | |
1617 | * | |
1618 | * NAND write with ECC | |
1619 | */ | |
e0c7d767 | 1620 | static int nand_write_ecc(struct mtd_info *mtd, loff_t to, size_t len, |
58dd8f2b | 1621 | size_t *retlen, const uint8_t *buf, uint8_t *eccbuf, |
e0c7d767 | 1622 | struct nand_oobinfo *oobsel) |
1da177e4 LT |
1623 | { |
1624 | int startpage, page, ret = -EIO, oob = 0, written = 0, chipnr; | |
1625 | int autoplace = 0, numpages, totalpages; | |
1626 | struct nand_chip *this = mtd->priv; | |
58dd8f2b | 1627 | uint8_t *oobbuf, *bufstart; |
e0c7d767 | 1628 | int ppblock = (1 << (this->phys_erase_shift - this->page_shift)); |
1da177e4 | 1629 | |
e0c7d767 | 1630 | DEBUG(MTD_DEBUG_LEVEL3, "nand_write_ecc: to = 0x%08x, len = %i\n", (unsigned int)to, (int)len); |
1da177e4 LT |
1631 | |
1632 | /* Initialize retlen, in case of early exit */ | |
1633 | *retlen = 0; | |
1634 | ||
1635 | /* Do not allow write past end of device */ | |
1636 | if ((to + len) > mtd->size) { | |
e0c7d767 | 1637 | DEBUG(MTD_DEBUG_LEVEL0, "nand_write_ecc: Attempt to write past end of page\n"); |
1da177e4 LT |
1638 | return -EINVAL; |
1639 | } | |
1640 | ||
61b03bd7 | 1641 | /* reject writes, which are not page aligned */ |
e0c7d767 DW |
1642 | if (NOTALIGNED(to) || NOTALIGNED(len)) { |
1643 | printk(KERN_NOTICE "nand_write_ecc: Attempt to write not page aligned data\n"); | |
1da177e4 LT |
1644 | return -EINVAL; |
1645 | } | |
1646 | ||
1647 | /* Grab the lock and see if the device is available */ | |
e0c7d767 | 1648 | nand_get_device(this, mtd, FL_WRITING); |
1da177e4 LT |
1649 | |
1650 | /* Calculate chipnr */ | |
1651 | chipnr = (int)(to >> this->chip_shift); | |
1652 | /* Select the NAND device */ | |
1653 | this->select_chip(mtd, chipnr); | |
1654 | ||
1655 | /* Check, if it is write protected */ | |
1656 | if (nand_check_wp(mtd)) | |
1657 | goto out; | |
1658 | ||
1659 | /* if oobsel is NULL, use chip defaults */ | |
61b03bd7 TG |
1660 | if (oobsel == NULL) |
1661 | oobsel = &mtd->oobinfo; | |
1662 | ||
1da177e4 LT |
1663 | /* Autoplace of oob data ? Use the default placement scheme */ |
1664 | if (oobsel->useecc == MTD_NANDECC_AUTOPLACE) { | |
1665 | oobsel = this->autooob; | |
1666 | autoplace = 1; | |
61b03bd7 | 1667 | } |
90e260c8 TG |
1668 | if (oobsel->useecc == MTD_NANDECC_AUTOPL_USR) |
1669 | autoplace = 1; | |
1da177e4 LT |
1670 | |
1671 | /* Setup variables and oob buffer */ | |
1672 | totalpages = len >> this->page_shift; | |
e0c7d767 | 1673 | page = (int)(to >> this->page_shift); |
1da177e4 | 1674 | /* Invalidate the page cache, if we write to the cached page */ |
61b03bd7 | 1675 | if (page <= this->pagebuf && this->pagebuf < (page + totalpages)) |
1da177e4 | 1676 | this->pagebuf = -1; |
61b03bd7 | 1677 | |
1da177e4 LT |
1678 | /* Set it relative to chip */ |
1679 | page &= this->pagemask; | |
1680 | startpage = page; | |
1681 | /* Calc number of pages we can write in one go */ | |
e0c7d767 DW |
1682 | numpages = min(ppblock - (startpage & (ppblock - 1)), totalpages); |
1683 | oobbuf = nand_prepare_oobbuf(mtd, eccbuf, oobsel, autoplace, numpages); | |
58dd8f2b | 1684 | bufstart = (uint8_t *) buf; |
1da177e4 LT |
1685 | |
1686 | /* Loop until all data is written */ | |
1687 | while (written < len) { | |
1688 | ||
58dd8f2b | 1689 | this->data_poi = (uint8_t *) &buf[written]; |
1da177e4 LT |
1690 | /* Write one page. If this is the last page to write |
1691 | * or the last page in this block, then use the | |
1692 | * real pageprogram command, else select cached programming | |
1693 | * if supported by the chip. | |
1694 | */ | |
e0c7d767 | 1695 | ret = nand_write_page(mtd, this, page, &oobbuf[oob], oobsel, (--numpages > 0)); |
1da177e4 | 1696 | if (ret) { |
e0c7d767 | 1697 | DEBUG(MTD_DEBUG_LEVEL0, "nand_write_ecc: write_page failed %d\n", ret); |
1da177e4 | 1698 | goto out; |
61b03bd7 | 1699 | } |
1da177e4 LT |
1700 | /* Next oob page */ |
1701 | oob += mtd->oobsize; | |
1702 | /* Update written bytes count */ | |
1703 | written += mtd->oobblock; | |
61b03bd7 | 1704 | if (written == len) |
1da177e4 | 1705 | goto cmp; |
61b03bd7 | 1706 | |
1da177e4 LT |
1707 | /* Increment page address */ |
1708 | page++; | |
1709 | ||
1710 | /* Have we hit a block boundary ? Then we have to verify and | |
1711 | * if verify is ok, we have to setup the oob buffer for | |
1712 | * the next pages. | |
e0c7d767 DW |
1713 | */ |
1714 | if (!(page & (ppblock - 1))) { | |
1da177e4 LT |
1715 | int ofs; |
1716 | this->data_poi = bufstart; | |
e0c7d767 DW |
1717 | ret = nand_verify_pages(mtd, this, startpage, page - startpage, |
1718 | oobbuf, oobsel, chipnr, (eccbuf != NULL)); | |
1da177e4 | 1719 | if (ret) { |
e0c7d767 | 1720 | DEBUG(MTD_DEBUG_LEVEL0, "nand_write_ecc: verify_pages failed %d\n", ret); |
1da177e4 | 1721 | goto out; |
61b03bd7 | 1722 | } |
1da177e4 LT |
1723 | *retlen = written; |
1724 | ||
1725 | ofs = autoplace ? mtd->oobavail : mtd->oobsize; | |
1726 | if (eccbuf) | |
1727 | eccbuf += (page - startpage) * ofs; | |
1728 | totalpages -= page - startpage; | |
e0c7d767 | 1729 | numpages = min(totalpages, ppblock); |
1da177e4 LT |
1730 | page &= this->pagemask; |
1731 | startpage = page; | |
e0c7d767 | 1732 | oobbuf = nand_prepare_oobbuf(mtd, eccbuf, oobsel, autoplace, numpages); |
868801e5 | 1733 | oob = 0; |
1da177e4 LT |
1734 | /* Check, if we cross a chip boundary */ |
1735 | if (!page) { | |
1736 | chipnr++; | |
1737 | this->select_chip(mtd, -1); | |
1738 | this->select_chip(mtd, chipnr); | |
1739 | } | |
1740 | } | |
1741 | } | |
1742 | /* Verify the remaining pages */ | |
e0c7d767 | 1743 | cmp: |
1da177e4 | 1744 | this->data_poi = bufstart; |
e0c7d767 | 1745 | ret = nand_verify_pages(mtd, this, startpage, totalpages, oobbuf, oobsel, chipnr, (eccbuf != NULL)); |
1da177e4 LT |
1746 | if (!ret) |
1747 | *retlen = written; | |
61b03bd7 | 1748 | else |
e0c7d767 | 1749 | DEBUG(MTD_DEBUG_LEVEL0, "nand_write_ecc: verify_pages failed %d\n", ret); |
1da177e4 | 1750 | |
e0c7d767 | 1751 | out: |
1da177e4 LT |
1752 | /* Deselect and wake up anyone waiting on the device */ |
1753 | nand_release_device(mtd); | |
1754 | ||
1755 | return ret; | |
1756 | } | |
1757 | ||
1da177e4 LT |
1758 | /** |
1759 | * nand_write_oob - [MTD Interface] NAND write out-of-band | |
1760 | * @mtd: MTD device structure | |
1761 | * @to: offset to write to | |
1762 | * @len: number of bytes to write | |
1763 | * @retlen: pointer to variable to store the number of written bytes | |
1764 | * @buf: the data to write | |
1765 | * | |
1766 | * NAND write out-of-band | |
1767 | */ | |
58dd8f2b | 1768 | static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const uint8_t *buf) |
1da177e4 LT |
1769 | { |
1770 | int column, page, status, ret = -EIO, chipnr; | |
1771 | struct nand_chip *this = mtd->priv; | |
1772 | ||
e0c7d767 | 1773 | DEBUG(MTD_DEBUG_LEVEL3, "nand_write_oob: to = 0x%08x, len = %i\n", (unsigned int)to, (int)len); |
1da177e4 LT |
1774 | |
1775 | /* Shift to get page */ | |
e0c7d767 DW |
1776 | page = (int)(to >> this->page_shift); |
1777 | chipnr = (int)(to >> this->chip_shift); | |
1da177e4 LT |
1778 | |
1779 | /* Mask to get column */ | |
1780 | column = to & (mtd->oobsize - 1); | |
1781 | ||
1782 | /* Initialize return length value */ | |
1783 | *retlen = 0; | |
1784 | ||
1785 | /* Do not allow write past end of page */ | |
1786 | if ((column + len) > mtd->oobsize) { | |
e0c7d767 | 1787 | DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: Attempt to write past end of page\n"); |
1da177e4 LT |
1788 | return -EINVAL; |
1789 | } | |
1790 | ||
1791 | /* Grab the lock and see if the device is available */ | |
e0c7d767 | 1792 | nand_get_device(this, mtd, FL_WRITING); |
1da177e4 LT |
1793 | |
1794 | /* Select the NAND device */ | |
1795 | this->select_chip(mtd, chipnr); | |
1796 | ||
1797 | /* Reset the chip. Some chips (like the Toshiba TC5832DC found | |
1798 | in one of my DiskOnChip 2000 test units) will clear the whole | |
1799 | data page too if we don't do this. I have no clue why, but | |
1800 | I seem to have 'fixed' it in the doc2000 driver in | |
1801 | August 1999. dwmw2. */ | |
1802 | this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); | |
1803 | ||
1804 | /* Check, if it is write protected */ | |
1805 | if (nand_check_wp(mtd)) | |
1806 | goto out; | |
61b03bd7 | 1807 | |
1da177e4 LT |
1808 | /* Invalidate the page cache, if we write to the cached page */ |
1809 | if (page == this->pagebuf) | |
1810 | this->pagebuf = -1; | |
1811 | ||
1812 | if (NAND_MUST_PAD(this)) { | |
1813 | /* Write out desired data */ | |
e0c7d767 | 1814 | this->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->oobblock, page & this->pagemask); |
1da177e4 LT |
1815 | /* prepad 0xff for partial programming */ |
1816 | this->write_buf(mtd, ffchars, column); | |
1817 | /* write data */ | |
1818 | this->write_buf(mtd, buf, len); | |
1819 | /* postpad 0xff for partial programming */ | |
e0c7d767 | 1820 | this->write_buf(mtd, ffchars, mtd->oobsize - (len + column)); |
1da177e4 LT |
1821 | } else { |
1822 | /* Write out desired data */ | |
e0c7d767 | 1823 | this->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->oobblock + column, page & this->pagemask); |
1da177e4 LT |
1824 | /* write data */ |
1825 | this->write_buf(mtd, buf, len); | |
1826 | } | |
1827 | /* Send command to program the OOB data */ | |
e0c7d767 | 1828 | this->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); |
1da177e4 | 1829 | |
e0c7d767 | 1830 | status = this->waitfunc(mtd, this, FL_WRITING); |
1da177e4 LT |
1831 | |
1832 | /* See if device thinks it succeeded */ | |
a4ab4c5d | 1833 | if (status & NAND_STATUS_FAIL) { |
e0c7d767 | 1834 | DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: " "Failed write, page 0x%08x\n", page); |
1da177e4 LT |
1835 | ret = -EIO; |
1836 | goto out; | |
1837 | } | |
1838 | /* Return happy */ | |
1839 | *retlen = len; | |
1840 | ||
1841 | #ifdef CONFIG_MTD_NAND_VERIFY_WRITE | |
1842 | /* Send command to read back the data */ | |
e0c7d767 | 1843 | this->cmdfunc(mtd, NAND_CMD_READOOB, column, page & this->pagemask); |
1da177e4 LT |
1844 | |
1845 | if (this->verify_buf(mtd, buf, len)) { | |
e0c7d767 | 1846 | DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: " "Failed write verify, page 0x%08x\n", page); |
1da177e4 LT |
1847 | ret = -EIO; |
1848 | goto out; | |
1849 | } | |
1850 | #endif | |
1851 | ret = 0; | |
e0c7d767 | 1852 | out: |
1da177e4 LT |
1853 | /* Deselect and wake up anyone waiting on the device */ |
1854 | nand_release_device(mtd); | |
1855 | ||
1856 | return ret; | |
1857 | } | |
1858 | ||
1da177e4 LT |
1859 | /** |
1860 | * nand_writev - [MTD Interface] compabilty function for nand_writev_ecc | |
1861 | * @mtd: MTD device structure | |
1862 | * @vecs: the iovectors to write | |
1863 | * @count: number of vectors | |
1864 | * @to: offset to write to | |
1865 | * @retlen: pointer to variable to store the number of written bytes | |
1866 | * | |
1867 | * NAND write with kvec. This just calls the ecc function | |
1868 | */ | |
e0c7d767 DW |
1869 | static int nand_writev(struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, |
1870 | loff_t to, size_t *retlen) | |
1da177e4 | 1871 | { |
e0c7d767 | 1872 | return (nand_writev_ecc(mtd, vecs, count, to, retlen, NULL, NULL)); |
1da177e4 LT |
1873 | } |
1874 | ||
1875 | /** | |
1876 | * nand_writev_ecc - [MTD Interface] write with iovec with ecc | |
1877 | * @mtd: MTD device structure | |
1878 | * @vecs: the iovectors to write | |
1879 | * @count: number of vectors | |
1880 | * @to: offset to write to | |
1881 | * @retlen: pointer to variable to store the number of written bytes | |
1882 | * @eccbuf: filesystem supplied oob data buffer | |
1883 | * @oobsel: oob selection structure | |
1884 | * | |
1885 | * NAND write with iovec with ecc | |
1886 | */ | |
e0c7d767 | 1887 | static int nand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, |
58dd8f2b | 1888 | loff_t to, size_t *retlen, uint8_t *eccbuf, struct nand_oobinfo *oobsel) |
1da177e4 LT |
1889 | { |
1890 | int i, page, len, total_len, ret = -EIO, written = 0, chipnr; | |
1891 | int oob, numpages, autoplace = 0, startpage; | |
1892 | struct nand_chip *this = mtd->priv; | |
e0c7d767 | 1893 | int ppblock = (1 << (this->phys_erase_shift - this->page_shift)); |
58dd8f2b | 1894 | uint8_t *oobbuf, *bufstart; |
1da177e4 LT |
1895 | |
1896 | /* Preset written len for early exit */ | |
1897 | *retlen = 0; | |
1898 | ||
1899 | /* Calculate total length of data */ | |
1900 | total_len = 0; | |
1901 | for (i = 0; i < count; i++) | |
e0c7d767 | 1902 | total_len += (int)vecs[i].iov_len; |
1da177e4 | 1903 | |
e0c7d767 | 1904 | DEBUG(MTD_DEBUG_LEVEL3, "nand_writev: to = 0x%08x, len = %i, count = %ld\n", (unsigned int)to, (unsigned int)total_len, count); |
1da177e4 LT |
1905 | |
1906 | /* Do not allow write past end of page */ | |
1907 | if ((to + total_len) > mtd->size) { | |
e0c7d767 | 1908 | DEBUG(MTD_DEBUG_LEVEL0, "nand_writev: Attempted write past end of device\n"); |
1da177e4 LT |
1909 | return -EINVAL; |
1910 | } | |
1911 | ||
61b03bd7 | 1912 | /* reject writes, which are not page aligned */ |
e0c7d767 DW |
1913 | if (NOTALIGNED(to) || NOTALIGNED(total_len)) { |
1914 | printk(KERN_NOTICE "nand_write_ecc: Attempt to write not page aligned data\n"); | |
1da177e4 LT |
1915 | return -EINVAL; |
1916 | } | |
1917 | ||
1918 | /* Grab the lock and see if the device is available */ | |
e0c7d767 | 1919 | nand_get_device(this, mtd, FL_WRITING); |
1da177e4 LT |
1920 | |
1921 | /* Get the current chip-nr */ | |
e0c7d767 | 1922 | chipnr = (int)(to >> this->chip_shift); |
1da177e4 LT |
1923 | /* Select the NAND device */ |
1924 | this->select_chip(mtd, chipnr); | |
1925 | ||
1926 | /* Check, if it is write protected */ | |
1927 | if (nand_check_wp(mtd)) | |
1928 | goto out; | |
1929 | ||
1930 | /* if oobsel is NULL, use chip defaults */ | |
61b03bd7 TG |
1931 | if (oobsel == NULL) |
1932 | oobsel = &mtd->oobinfo; | |
1da177e4 LT |
1933 | |
1934 | /* Autoplace of oob data ? Use the default placement scheme */ | |
1935 | if (oobsel->useecc == MTD_NANDECC_AUTOPLACE) { | |
1936 | oobsel = this->autooob; | |
1937 | autoplace = 1; | |
61b03bd7 | 1938 | } |
90e260c8 TG |
1939 | if (oobsel->useecc == MTD_NANDECC_AUTOPL_USR) |
1940 | autoplace = 1; | |
1da177e4 LT |
1941 | |
1942 | /* Setup start page */ | |
e0c7d767 | 1943 | page = (int)(to >> this->page_shift); |
1da177e4 | 1944 | /* Invalidate the page cache, if we write to the cached page */ |
61b03bd7 | 1945 | if (page <= this->pagebuf && this->pagebuf < ((to + total_len) >> this->page_shift)) |
1da177e4 LT |
1946 | this->pagebuf = -1; |
1947 | ||
1948 | startpage = page & this->pagemask; | |
1949 | ||
1950 | /* Loop until all kvec' data has been written */ | |
1951 | len = 0; | |
1952 | while (count) { | |
1953 | /* If the given tuple is >= pagesize then | |
1954 | * write it out from the iov | |
1955 | */ | |
1956 | if ((vecs->iov_len - len) >= mtd->oobblock) { | |
1957 | /* Calc number of pages we can write | |
1958 | * out of this iov in one go */ | |
1959 | numpages = (vecs->iov_len - len) >> this->page_shift; | |
1960 | /* Do not cross block boundaries */ | |
e0c7d767 DW |
1961 | numpages = min(ppblock - (startpage & (ppblock - 1)), numpages); |
1962 | oobbuf = nand_prepare_oobbuf(mtd, NULL, oobsel, autoplace, numpages); | |
58dd8f2b | 1963 | bufstart = (uint8_t *) vecs->iov_base; |
1da177e4 LT |
1964 | bufstart += len; |
1965 | this->data_poi = bufstart; | |
1966 | oob = 0; | |
1967 | for (i = 1; i <= numpages; i++) { | |
1968 | /* Write one page. If this is the last page to write | |
61b03bd7 | 1969 | * then use the real pageprogram command, else select |
1da177e4 LT |
1970 | * cached programming if supported by the chip. |
1971 | */ | |
e0c7d767 DW |
1972 | ret = nand_write_page(mtd, this, page & this->pagemask, |
1973 | &oobbuf[oob], oobsel, i != numpages); | |
1da177e4 LT |
1974 | if (ret) |
1975 | goto out; | |
1976 | this->data_poi += mtd->oobblock; | |
1977 | len += mtd->oobblock; | |
1978 | oob += mtd->oobsize; | |
1979 | page++; | |
1980 | } | |
1981 | /* Check, if we have to switch to the next tuple */ | |
e0c7d767 | 1982 | if (len >= (int)vecs->iov_len) { |
1da177e4 LT |
1983 | vecs++; |
1984 | len = 0; | |
1985 | count--; | |
1986 | } | |
1987 | } else { | |
61b03bd7 | 1988 | /* We must use the internal buffer, read data out of each |
1da177e4 LT |
1989 | * tuple until we have a full page to write |
1990 | */ | |
1991 | int cnt = 0; | |
1992 | while (cnt < mtd->oobblock) { | |
61b03bd7 | 1993 | if (vecs->iov_base != NULL && vecs->iov_len) |
58dd8f2b | 1994 | this->data_buf[cnt++] = ((uint8_t *) vecs->iov_base)[len++]; |
1da177e4 | 1995 | /* Check, if we have to switch to the next tuple */ |
e0c7d767 | 1996 | if (len >= (int)vecs->iov_len) { |
1da177e4 LT |
1997 | vecs++; |
1998 | len = 0; | |
1999 | count--; | |
2000 | } | |
2001 | } | |
61b03bd7 TG |
2002 | this->pagebuf = page; |
2003 | this->data_poi = this->data_buf; | |
1da177e4 | 2004 | bufstart = this->data_poi; |
61b03bd7 | 2005 | numpages = 1; |
e0c7d767 DW |
2006 | oobbuf = nand_prepare_oobbuf(mtd, NULL, oobsel, autoplace, numpages); |
2007 | ret = nand_write_page(mtd, this, page & this->pagemask, oobbuf, oobsel, 0); | |
1da177e4 LT |
2008 | if (ret) |
2009 | goto out; | |
2010 | page++; | |
2011 | } | |
2012 | ||
2013 | this->data_poi = bufstart; | |
e0c7d767 | 2014 | ret = nand_verify_pages(mtd, this, startpage, numpages, oobbuf, oobsel, chipnr, 0); |
1da177e4 LT |
2015 | if (ret) |
2016 | goto out; | |
61b03bd7 | 2017 | |
1da177e4 LT |
2018 | written += mtd->oobblock * numpages; |
2019 | /* All done ? */ | |
2020 | if (!count) | |
2021 | break; | |
2022 | ||
2023 | startpage = page & this->pagemask; | |
2024 | /* Check, if we cross a chip boundary */ | |
2025 | if (!startpage) { | |
2026 | chipnr++; | |
2027 | this->select_chip(mtd, -1); | |
2028 | this->select_chip(mtd, chipnr); | |
2029 | } | |
2030 | } | |
2031 | ret = 0; | |
e0c7d767 | 2032 | out: |
1da177e4 LT |
2033 | /* Deselect and wake up anyone waiting on the device */ |
2034 | nand_release_device(mtd); | |
2035 | ||
2036 | *retlen = written; | |
2037 | return ret; | |
2038 | } | |
2039 | ||
2040 | /** | |
2041 | * single_erease_cmd - [GENERIC] NAND standard block erase command function | |
2042 | * @mtd: MTD device structure | |
2043 | * @page: the page address of the block which will be erased | |
2044 | * | |
2045 | * Standard erase command for NAND chips | |
2046 | */ | |
e0c7d767 | 2047 | static void single_erase_cmd(struct mtd_info *mtd, int page) |
1da177e4 LT |
2048 | { |
2049 | struct nand_chip *this = mtd->priv; | |
2050 | /* Send commands to erase a block */ | |
e0c7d767 DW |
2051 | this->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page); |
2052 | this->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1); | |
1da177e4 LT |
2053 | } |
2054 | ||
2055 | /** | |
2056 | * multi_erease_cmd - [GENERIC] AND specific block erase command function | |
2057 | * @mtd: MTD device structure | |
2058 | * @page: the page address of the block which will be erased | |
2059 | * | |
2060 | * AND multi block erase command function | |
2061 | * Erase 4 consecutive blocks | |
2062 | */ | |
e0c7d767 | 2063 | static void multi_erase_cmd(struct mtd_info *mtd, int page) |
1da177e4 LT |
2064 | { |
2065 | struct nand_chip *this = mtd->priv; | |
2066 | /* Send commands to erase a block */ | |
e0c7d767 DW |
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_ERASE1, -1, page); | |
2071 | this->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1); | |
1da177e4 LT |
2072 | } |
2073 | ||
2074 | /** | |
2075 | * nand_erase - [MTD Interface] erase block(s) | |
2076 | * @mtd: MTD device structure | |
2077 | * @instr: erase instruction | |
2078 | * | |
2079 | * Erase one ore more blocks | |
2080 | */ | |
e0c7d767 | 2081 | static int nand_erase(struct mtd_info *mtd, struct erase_info *instr) |
1da177e4 | 2082 | { |
e0c7d767 | 2083 | return nand_erase_nand(mtd, instr, 0); |
1da177e4 | 2084 | } |
61b03bd7 | 2085 | |
30f464b7 | 2086 | #define BBT_PAGE_MASK 0xffffff3f |
1da177e4 LT |
2087 | /** |
2088 | * nand_erase_intern - [NAND Interface] erase block(s) | |
2089 | * @mtd: MTD device structure | |
2090 | * @instr: erase instruction | |
2091 | * @allowbbt: allow erasing the bbt area | |
2092 | * | |
2093 | * Erase one ore more blocks | |
2094 | */ | |
e0c7d767 | 2095 | int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr, int allowbbt) |
1da177e4 LT |
2096 | { |
2097 | int page, len, status, pages_per_block, ret, chipnr; | |
2098 | struct nand_chip *this = mtd->priv; | |
30f464b7 DM |
2099 | int rewrite_bbt[NAND_MAX_CHIPS]={0}; /* flags to indicate the page, if bbt needs to be rewritten. */ |
2100 | unsigned int bbt_masked_page; /* bbt mask to compare to page being erased. */ | |
2101 | /* It is used to see if the current page is in the same */ | |
2102 | /* 256 block group and the same bank as the bbt. */ | |
1da177e4 | 2103 | |
e0c7d767 | 2104 | DEBUG(MTD_DEBUG_LEVEL3, "nand_erase: start = 0x%08x, len = %i\n", (unsigned int)instr->addr, (unsigned int)instr->len); |
1da177e4 LT |
2105 | |
2106 | /* Start address must align on block boundary */ | |
2107 | if (instr->addr & ((1 << this->phys_erase_shift) - 1)) { | |
e0c7d767 | 2108 | DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Unaligned address\n"); |
1da177e4 LT |
2109 | return -EINVAL; |
2110 | } | |
2111 | ||
2112 | /* Length must align on block boundary */ | |
2113 | if (instr->len & ((1 << this->phys_erase_shift) - 1)) { | |
e0c7d767 | 2114 | DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Length not block aligned\n"); |
1da177e4 LT |
2115 | return -EINVAL; |
2116 | } | |
2117 | ||
2118 | /* Do not allow erase past end of device */ | |
2119 | if ((instr->len + instr->addr) > mtd->size) { | |
e0c7d767 | 2120 | DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Erase past end of device\n"); |
1da177e4 LT |
2121 | return -EINVAL; |
2122 | } | |
2123 | ||
2124 | instr->fail_addr = 0xffffffff; | |
2125 | ||
2126 | /* Grab the lock and see if the device is available */ | |
e0c7d767 | 2127 | nand_get_device(this, mtd, FL_ERASING); |
1da177e4 LT |
2128 | |
2129 | /* Shift to get first page */ | |
e0c7d767 DW |
2130 | page = (int)(instr->addr >> this->page_shift); |
2131 | chipnr = (int)(instr->addr >> this->chip_shift); | |
1da177e4 LT |
2132 | |
2133 | /* Calculate pages in each block */ | |
2134 | pages_per_block = 1 << (this->phys_erase_shift - this->page_shift); | |
2135 | ||
2136 | /* Select the NAND device */ | |
2137 | this->select_chip(mtd, chipnr); | |
2138 | ||
2139 | /* Check the WP bit */ | |
2140 | /* Check, if it is write protected */ | |
2141 | if (nand_check_wp(mtd)) { | |
e0c7d767 | 2142 | DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Device is write protected!!!\n"); |
1da177e4 LT |
2143 | instr->state = MTD_ERASE_FAILED; |
2144 | goto erase_exit; | |
2145 | } | |
2146 | ||
30f464b7 DM |
2147 | /* if BBT requires refresh, set the BBT page mask to see if the BBT should be rewritten */ |
2148 | if (this->options & BBT_AUTO_REFRESH) { | |
2149 | bbt_masked_page = this->bbt_td->pages[chipnr] & BBT_PAGE_MASK; | |
2150 | } else { | |
2151 | bbt_masked_page = 0xffffffff; /* should not match anything */ | |
2152 | } | |
2153 | ||
1da177e4 LT |
2154 | /* Loop through the pages */ |
2155 | len = instr->len; | |
2156 | ||
2157 | instr->state = MTD_ERASING; | |
2158 | ||
2159 | while (len) { | |
2160 | /* Check if we have a bad block, we do not erase bad blocks ! */ | |
2161 | if (nand_block_checkbad(mtd, ((loff_t) page) << this->page_shift, 0, allowbbt)) { | |
e0c7d767 | 2162 | printk(KERN_WARNING "nand_erase: attempt to erase a bad block at page 0x%08x\n", page); |
1da177e4 LT |
2163 | instr->state = MTD_ERASE_FAILED; |
2164 | goto erase_exit; | |
2165 | } | |
61b03bd7 TG |
2166 | |
2167 | /* Invalidate the page cache, if we erase the block which contains | |
1da177e4 LT |
2168 | the current cached page */ |
2169 | if (page <= this->pagebuf && this->pagebuf < (page + pages_per_block)) | |
2170 | this->pagebuf = -1; | |
2171 | ||
e0c7d767 | 2172 | this->erase_cmd(mtd, page & this->pagemask); |
61b03bd7 | 2173 | |
e0c7d767 | 2174 | status = this->waitfunc(mtd, this, FL_ERASING); |
1da177e4 | 2175 | |
068e3c0a DM |
2176 | /* See if operation failed and additional status checks are available */ |
2177 | if ((status & NAND_STATUS_FAIL) && (this->errstat)) { | |
2178 | status = this->errstat(mtd, this, FL_ERASING, status, page); | |
2179 | } | |
2180 | ||
1da177e4 | 2181 | /* See if block erase succeeded */ |
a4ab4c5d | 2182 | if (status & NAND_STATUS_FAIL) { |
e0c7d767 | 2183 | DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: " "Failed erase, page 0x%08x\n", page); |
1da177e4 LT |
2184 | instr->state = MTD_ERASE_FAILED; |
2185 | instr->fail_addr = (page << this->page_shift); | |
2186 | goto erase_exit; | |
2187 | } | |
30f464b7 DM |
2188 | |
2189 | /* if BBT requires refresh, set the BBT rewrite flag to the page being erased */ | |
2190 | if (this->options & BBT_AUTO_REFRESH) { | |
61b03bd7 | 2191 | if (((page & BBT_PAGE_MASK) == bbt_masked_page) && |
30f464b7 DM |
2192 | (page != this->bbt_td->pages[chipnr])) { |
2193 | rewrite_bbt[chipnr] = (page << this->page_shift); | |
2194 | } | |
2195 | } | |
61b03bd7 | 2196 | |
1da177e4 LT |
2197 | /* Increment page address and decrement length */ |
2198 | len -= (1 << this->phys_erase_shift); | |
2199 | page += pages_per_block; | |
2200 | ||
2201 | /* Check, if we cross a chip boundary */ | |
2202 | if (len && !(page & this->pagemask)) { | |
2203 | chipnr++; | |
2204 | this->select_chip(mtd, -1); | |
2205 | this->select_chip(mtd, chipnr); | |
30f464b7 | 2206 | |
61b03bd7 | 2207 | /* if BBT requires refresh and BBT-PERCHIP, |
30f464b7 DM |
2208 | * set the BBT page mask to see if this BBT should be rewritten */ |
2209 | if ((this->options & BBT_AUTO_REFRESH) && (this->bbt_td->options & NAND_BBT_PERCHIP)) { | |
2210 | bbt_masked_page = this->bbt_td->pages[chipnr] & BBT_PAGE_MASK; | |
2211 | } | |
2212 | ||
1da177e4 LT |
2213 | } |
2214 | } | |
2215 | instr->state = MTD_ERASE_DONE; | |
2216 | ||
e0c7d767 | 2217 | erase_exit: |
1da177e4 LT |
2218 | |
2219 | ret = instr->state == MTD_ERASE_DONE ? 0 : -EIO; | |
2220 | /* Do call back function */ | |
2221 | if (!ret) | |
2222 | mtd_erase_callback(instr); | |
2223 | ||
2224 | /* Deselect and wake up anyone waiting on the device */ | |
2225 | nand_release_device(mtd); | |
2226 | ||
30f464b7 DM |
2227 | /* if BBT requires refresh and erase was successful, rewrite any selected bad block tables */ |
2228 | if ((this->options & BBT_AUTO_REFRESH) && (!ret)) { | |
2229 | for (chipnr = 0; chipnr < this->numchips; chipnr++) { | |
2230 | if (rewrite_bbt[chipnr]) { | |
2231 | /* update the BBT for chip */ | |
e0c7d767 DW |
2232 | DEBUG(MTD_DEBUG_LEVEL0, "nand_erase_nand: nand_update_bbt (%d:0x%0x 0x%0x)\n", |
2233 | chipnr, rewrite_bbt[chipnr], this->bbt_td->pages[chipnr]); | |
2234 | nand_update_bbt(mtd, rewrite_bbt[chipnr]); | |
30f464b7 DM |
2235 | } |
2236 | } | |
2237 | } | |
2238 | ||
1da177e4 LT |
2239 | /* Return more or less happy */ |
2240 | return ret; | |
2241 | } | |
2242 | ||
2243 | /** | |
2244 | * nand_sync - [MTD Interface] sync | |
2245 | * @mtd: MTD device structure | |
2246 | * | |
2247 | * Sync is actually a wait for chip ready function | |
2248 | */ | |
e0c7d767 | 2249 | static void nand_sync(struct mtd_info *mtd) |
1da177e4 LT |
2250 | { |
2251 | struct nand_chip *this = mtd->priv; | |
2252 | ||
e0c7d767 | 2253 | DEBUG(MTD_DEBUG_LEVEL3, "nand_sync: called\n"); |
1da177e4 LT |
2254 | |
2255 | /* Grab the lock and see if the device is available */ | |
e0c7d767 | 2256 | nand_get_device(this, mtd, FL_SYNCING); |
1da177e4 | 2257 | /* Release it and go back */ |
e0c7d767 | 2258 | nand_release_device(mtd); |
1da177e4 LT |
2259 | } |
2260 | ||
1da177e4 LT |
2261 | /** |
2262 | * nand_block_isbad - [MTD Interface] Check whether the block at the given offset is bad | |
2263 | * @mtd: MTD device structure | |
2264 | * @ofs: offset relative to mtd start | |
2265 | */ | |
e0c7d767 | 2266 | static int nand_block_isbad(struct mtd_info *mtd, loff_t ofs) |
1da177e4 LT |
2267 | { |
2268 | /* Check for invalid offset */ | |
61b03bd7 | 2269 | if (ofs > mtd->size) |
1da177e4 | 2270 | return -EINVAL; |
61b03bd7 | 2271 | |
e0c7d767 | 2272 | return nand_block_checkbad(mtd, ofs, 1, 0); |
1da177e4 LT |
2273 | } |
2274 | ||
2275 | /** | |
2276 | * nand_block_markbad - [MTD Interface] Mark the block at the given offset as bad | |
2277 | * @mtd: MTD device structure | |
2278 | * @ofs: offset relative to mtd start | |
2279 | */ | |
e0c7d767 | 2280 | static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs) |
1da177e4 LT |
2281 | { |
2282 | struct nand_chip *this = mtd->priv; | |
2283 | int ret; | |
2284 | ||
e0c7d767 DW |
2285 | if ((ret = nand_block_isbad(mtd, ofs))) { |
2286 | /* If it was bad already, return success and do nothing. */ | |
1da177e4 LT |
2287 | if (ret > 0) |
2288 | return 0; | |
e0c7d767 DW |
2289 | return ret; |
2290 | } | |
1da177e4 LT |
2291 | |
2292 | return this->block_markbad(mtd, ofs); | |
2293 | } | |
2294 | ||
962034f4 VW |
2295 | /** |
2296 | * nand_suspend - [MTD Interface] Suspend the NAND flash | |
2297 | * @mtd: MTD device structure | |
2298 | */ | |
2299 | static int nand_suspend(struct mtd_info *mtd) | |
2300 | { | |
2301 | struct nand_chip *this = mtd->priv; | |
2302 | ||
e0c7d767 | 2303 | return nand_get_device(this, mtd, FL_PM_SUSPENDED); |
962034f4 VW |
2304 | } |
2305 | ||
2306 | /** | |
2307 | * nand_resume - [MTD Interface] Resume the NAND flash | |
2308 | * @mtd: MTD device structure | |
2309 | */ | |
2310 | static void nand_resume(struct mtd_info *mtd) | |
2311 | { | |
2312 | struct nand_chip *this = mtd->priv; | |
2313 | ||
2314 | if (this->state == FL_PM_SUSPENDED) | |
2315 | nand_release_device(mtd); | |
2316 | else | |
2c0a2bed TG |
2317 | printk(KERN_ERR "nand_resume() called for a chip which is not " |
2318 | "in suspended state\n"); | |
962034f4 VW |
2319 | } |
2320 | ||
a36ed299 TG |
2321 | /* |
2322 | * Free allocated data structures | |
2323 | */ | |
2324 | static void nand_free_kmem(struct nand_chip *this) | |
2325 | { | |
2326 | /* Buffer allocated by nand_scan ? */ | |
2327 | if (this->options & NAND_OOBBUF_ALLOC) | |
2328 | kfree(this->oob_buf); | |
2329 | /* Buffer allocated by nand_scan ? */ | |
2330 | if (this->options & NAND_DATABUF_ALLOC) | |
2331 | kfree(this->data_buf); | |
2332 | /* Controller allocated by nand_scan ? */ | |
2333 | if (this->options & NAND_CONTROLLER_ALLOC) | |
2334 | kfree(this->controller); | |
2335 | } | |
2336 | ||
7aa65bfd TG |
2337 | /* |
2338 | * Allocate buffers and data structures | |
1da177e4 | 2339 | */ |
7aa65bfd | 2340 | static int nand_allocate_kmem(struct mtd_info *mtd, struct nand_chip *this) |
1da177e4 | 2341 | { |
7aa65bfd | 2342 | size_t len; |
1da177e4 | 2343 | |
7aa65bfd TG |
2344 | if (!this->oob_buf) { |
2345 | len = mtd->oobsize << | |
2346 | (this->phys_erase_shift - this->page_shift); | |
2347 | this->oob_buf = kmalloc(len, GFP_KERNEL); | |
2348 | if (!this->oob_buf) | |
2349 | goto outerr; | |
2350 | this->options |= NAND_OOBBUF_ALLOC; | |
552d9205 DW |
2351 | } |
2352 | ||
7aa65bfd TG |
2353 | if (!this->data_buf) { |
2354 | len = mtd->oobblock + mtd->oobsize; | |
2355 | this->data_buf = kmalloc(len, GFP_KERNEL); | |
2356 | if (!this->data_buf) | |
2357 | goto outerr; | |
2358 | this->options |= NAND_DATABUF_ALLOC; | |
2359 | } | |
2360 | ||
2361 | if (!this->controller) { | |
2362 | this->controller = kzalloc(sizeof(struct nand_hw_control), | |
2363 | GFP_KERNEL); | |
2364 | if (!this->controller) | |
2365 | goto outerr; | |
2366 | this->options |= NAND_CONTROLLER_ALLOC; | |
2367 | } | |
2368 | return 0; | |
1da177e4 | 2369 | |
7aa65bfd TG |
2370 | outerr: |
2371 | printk(KERN_ERR "nand_scan(): Cannot allocate buffers\n"); | |
2372 | nand_free_kmem(this); | |
2373 | return -ENOMEM; | |
2374 | } | |
2375 | ||
2376 | /* | |
2377 | * Set default functions | |
2378 | */ | |
2379 | static void nand_set_defaults(struct nand_chip *this, int busw) | |
2380 | { | |
1da177e4 LT |
2381 | /* check for proper chip_delay setup, set 20us if not */ |
2382 | if (!this->chip_delay) | |
2383 | this->chip_delay = 20; | |
2384 | ||
2385 | /* check, if a user supplied command function given */ | |
2386 | if (this->cmdfunc == NULL) | |
2387 | this->cmdfunc = nand_command; | |
2388 | ||
2389 | /* check, if a user supplied wait function given */ | |
2390 | if (this->waitfunc == NULL) | |
2391 | this->waitfunc = nand_wait; | |
2392 | ||
2393 | if (!this->select_chip) | |
2394 | this->select_chip = nand_select_chip; | |
2395 | if (!this->write_byte) | |
2396 | this->write_byte = busw ? nand_write_byte16 : nand_write_byte; | |
2397 | if (!this->read_byte) | |
2398 | this->read_byte = busw ? nand_read_byte16 : nand_read_byte; | |
2399 | if (!this->write_word) | |
2400 | this->write_word = nand_write_word; | |
2401 | if (!this->read_word) | |
2402 | this->read_word = nand_read_word; | |
2403 | if (!this->block_bad) | |
2404 | this->block_bad = nand_block_bad; | |
2405 | if (!this->block_markbad) | |
2406 | this->block_markbad = nand_default_block_markbad; | |
2407 | if (!this->write_buf) | |
2408 | this->write_buf = busw ? nand_write_buf16 : nand_write_buf; | |
2409 | if (!this->read_buf) | |
2410 | this->read_buf = busw ? nand_read_buf16 : nand_read_buf; | |
2411 | if (!this->verify_buf) | |
2412 | this->verify_buf = busw ? nand_verify_buf16 : nand_verify_buf; | |
2413 | if (!this->scan_bbt) | |
2414 | this->scan_bbt = nand_default_bbt; | |
7aa65bfd TG |
2415 | } |
2416 | ||
2417 | /* | |
2418 | * Get the flash and manufacturer id and lookup if the typ is supported | |
2419 | */ | |
2420 | static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, | |
2421 | struct nand_chip *this, | |
2422 | int busw, int *maf_id) | |
2423 | { | |
2424 | struct nand_flash_dev *type = NULL; | |
2425 | int i, dev_id, maf_idx; | |
1da177e4 LT |
2426 | |
2427 | /* Select the device */ | |
2428 | this->select_chip(mtd, 0); | |
2429 | ||
2430 | /* Send the command for reading device ID */ | |
e0c7d767 | 2431 | this->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); |
1da177e4 LT |
2432 | |
2433 | /* Read manufacturer and device IDs */ | |
7aa65bfd TG |
2434 | *maf_id = this->read_byte(mtd); |
2435 | dev_id = this->read_byte(mtd); | |
1da177e4 | 2436 | |
7aa65bfd | 2437 | /* Lookup the flash id */ |
1da177e4 | 2438 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { |
7aa65bfd TG |
2439 | if (dev_id == nand_flash_ids[i].id) { |
2440 | type = &nand_flash_ids[i]; | |
2441 | break; | |
2442 | } | |
2443 | } | |
61b03bd7 | 2444 | |
7aa65bfd TG |
2445 | if (!type) |
2446 | return ERR_PTR(-ENODEV); | |
2447 | ||
2448 | this->chipsize = nand_flash_ids[i].chipsize << 20; | |
2449 | ||
2450 | /* Newer devices have all the information in additional id bytes */ | |
2451 | if (!nand_flash_ids[i].pagesize) { | |
2452 | int extid; | |
2453 | /* The 3rd id byte contains non relevant data ATM */ | |
2454 | extid = this->read_byte(mtd); | |
2455 | /* The 4th id byte is the important one */ | |
2456 | extid = this->read_byte(mtd); | |
2457 | /* Calc pagesize */ | |
2458 | mtd->oobblock = 1024 << (extid & 0x3); | |
2459 | extid >>= 2; | |
2460 | /* Calc oobsize */ | |
2461 | mtd->oobsize = (8 << (extid & 0x01)) * (mtd->oobblock >> 9); | |
2462 | extid >>= 2; | |
2463 | /* Calc blocksize. Blocksize is multiples of 64KiB */ | |
2464 | mtd->erasesize = (64 * 1024) << (extid & 0x03); | |
2465 | extid >>= 2; | |
2466 | /* Get buswidth information */ | |
2467 | busw = (extid & 0x01) ? NAND_BUSWIDTH_16 : 0; | |
61b03bd7 | 2468 | |
7aa65bfd TG |
2469 | } else { |
2470 | /* | |
2471 | * Old devices have this data hardcoded in the device id table | |
2472 | */ | |
2473 | mtd->erasesize = nand_flash_ids[i].erasesize; | |
2474 | mtd->oobblock = nand_flash_ids[i].pagesize; | |
2475 | mtd->oobsize = mtd->oobblock / 32; | |
2476 | busw = nand_flash_ids[i].options & NAND_BUSWIDTH_16; | |
2477 | } | |
1da177e4 | 2478 | |
7aa65bfd TG |
2479 | /* Try to identify manufacturer */ |
2480 | for (maf_idx = 0; nand_manuf_ids[maf_idx].id != 0x0; maf_id++) { | |
2481 | if (nand_manuf_ids[maf_idx].id == *maf_id) | |
2482 | break; | |
2483 | } | |
0ea4a755 | 2484 | |
7aa65bfd TG |
2485 | /* |
2486 | * Check, if buswidth is correct. Hardware drivers should set | |
2487 | * this correct ! | |
2488 | */ | |
2489 | if (busw != (this->options & NAND_BUSWIDTH_16)) { | |
2490 | printk(KERN_INFO "NAND device: Manufacturer ID:" | |
2491 | " 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, | |
2492 | dev_id, nand_manuf_ids[maf_idx].name, mtd->name); | |
2493 | printk(KERN_WARNING "NAND bus width %d instead %d bit\n", | |
2494 | (this->options & NAND_BUSWIDTH_16) ? 16 : 8, | |
2495 | busw ? 16 : 8); | |
2496 | return ERR_PTR(-EINVAL); | |
2497 | } | |
61b03bd7 | 2498 | |
7aa65bfd TG |
2499 | /* Calculate the address shift from the page size */ |
2500 | this->page_shift = ffs(mtd->oobblock) - 1; | |
2501 | /* Convert chipsize to number of pages per chip -1. */ | |
2502 | this->pagemask = (this->chipsize >> this->page_shift) - 1; | |
61b03bd7 | 2503 | |
7aa65bfd TG |
2504 | this->bbt_erase_shift = this->phys_erase_shift = |
2505 | ffs(mtd->erasesize) - 1; | |
2506 | this->chip_shift = ffs(this->chipsize) - 1; | |
1da177e4 | 2507 | |
7aa65bfd TG |
2508 | /* Set the bad block position */ |
2509 | this->badblockpos = mtd->oobblock > 512 ? | |
2510 | NAND_LARGE_BADBLOCK_POS : NAND_SMALL_BADBLOCK_POS; | |
61b03bd7 | 2511 | |
7aa65bfd TG |
2512 | /* Get chip options, preserve non chip based options */ |
2513 | this->options &= ~NAND_CHIPOPTIONS_MSK; | |
2514 | this->options |= nand_flash_ids[i].options & NAND_CHIPOPTIONS_MSK; | |
2515 | ||
2516 | /* | |
2517 | * Set this as a default. Board drivers can override it, if necessary | |
2518 | */ | |
2519 | this->options |= NAND_NO_AUTOINCR; | |
2520 | ||
2521 | /* Check if this is a not a samsung device. Do not clear the | |
2522 | * options for chips which are not having an extended id. | |
2523 | */ | |
2524 | if (*maf_id != NAND_MFR_SAMSUNG && !nand_flash_ids[i].pagesize) | |
2525 | this->options &= ~NAND_SAMSUNG_LP_OPTIONS; | |
2526 | ||
2527 | /* Check for AND chips with 4 page planes */ | |
2528 | if (this->options & NAND_4PAGE_ARRAY) | |
2529 | this->erase_cmd = multi_erase_cmd; | |
2530 | else | |
2531 | this->erase_cmd = single_erase_cmd; | |
2532 | ||
2533 | /* Do not replace user supplied command function ! */ | |
2534 | if (mtd->oobblock > 512 && this->cmdfunc == nand_command) | |
2535 | this->cmdfunc = nand_command_lp; | |
2536 | ||
2537 | printk(KERN_INFO "NAND device: Manufacturer ID:" | |
2538 | " 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, dev_id, | |
2539 | nand_manuf_ids[maf_idx].name, type->name); | |
2540 | ||
2541 | return type; | |
2542 | } | |
2543 | ||
2544 | /* module_text_address() isn't exported, and it's mostly a pointless | |
2545 | test if this is a module _anyway_ -- they'd have to try _really_ hard | |
2546 | to call us from in-kernel code if the core NAND support is modular. */ | |
2547 | #ifdef MODULE | |
2548 | #define caller_is_module() (1) | |
2549 | #else | |
2550 | #define caller_is_module() \ | |
2551 | module_text_address((unsigned long)__builtin_return_address(0)) | |
2552 | #endif | |
2553 | ||
2554 | /** | |
2555 | * nand_scan - [NAND Interface] Scan for the NAND device | |
2556 | * @mtd: MTD device structure | |
2557 | * @maxchips: Number of chips to scan for | |
2558 | * | |
2559 | * This fills out all the uninitialized function pointers | |
2560 | * with the defaults. | |
2561 | * The flash ID is read and the mtd/chip structures are | |
2562 | * filled with the appropriate values. Buffers are allocated if | |
2563 | * they are not provided by the board driver | |
2564 | * The mtd->owner field must be set to the module of the caller | |
2565 | * | |
2566 | */ | |
2567 | int nand_scan(struct mtd_info *mtd, int maxchips) | |
2568 | { | |
2569 | int i, busw, nand_maf_id; | |
2570 | struct nand_chip *this = mtd->priv; | |
2571 | struct nand_flash_dev *type; | |
2572 | ||
2573 | /* Many callers got this wrong, so check for it for a while... */ | |
2574 | if (!mtd->owner && caller_is_module()) { | |
2575 | printk(KERN_CRIT "nand_scan() called with NULL mtd->owner!\n"); | |
2576 | BUG(); | |
1da177e4 LT |
2577 | } |
2578 | ||
7aa65bfd TG |
2579 | /* Get buswidth to select the correct functions */ |
2580 | busw = this->options & NAND_BUSWIDTH_16; | |
2581 | /* Set the default functions */ | |
2582 | nand_set_defaults(this, busw); | |
2583 | ||
2584 | /* Read the flash type */ | |
2585 | type = nand_get_flash_type(mtd, this, busw, &nand_maf_id); | |
2586 | ||
2587 | if (IS_ERR(type)) { | |
e0c7d767 | 2588 | printk(KERN_WARNING "No NAND device found!!!\n"); |
1da177e4 | 2589 | this->select_chip(mtd, -1); |
7aa65bfd | 2590 | return PTR_ERR(type); |
1da177e4 LT |
2591 | } |
2592 | ||
7aa65bfd | 2593 | /* Check for a chip array */ |
e0c7d767 | 2594 | for (i = 1; i < maxchips; i++) { |
1da177e4 | 2595 | this->select_chip(mtd, i); |
1da177e4 | 2596 | /* Send the command for reading device ID */ |
e0c7d767 | 2597 | this->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); |
1da177e4 LT |
2598 | /* Read manufacturer and device IDs */ |
2599 | if (nand_maf_id != this->read_byte(mtd) || | |
7aa65bfd | 2600 | type->id != this->read_byte(mtd)) |
1da177e4 LT |
2601 | break; |
2602 | } | |
2603 | if (i > 1) | |
2604 | printk(KERN_INFO "%d NAND chips detected\n", i); | |
61b03bd7 | 2605 | |
1da177e4 LT |
2606 | /* Store the number of chips and calc total size for mtd */ |
2607 | this->numchips = i; | |
2608 | mtd->size = i * this->chipsize; | |
7aa65bfd TG |
2609 | |
2610 | /* Allocate buffers and data structures */ | |
2611 | if (nand_allocate_kmem(mtd, this)) | |
2612 | return -ENOMEM; | |
2613 | ||
1da177e4 | 2614 | /* Preset the internal oob buffer */ |
7aa65bfd TG |
2615 | memset(this->oob_buf, 0xff, |
2616 | mtd->oobsize << (this->phys_erase_shift - this->page_shift)); | |
1da177e4 | 2617 | |
7aa65bfd TG |
2618 | /* |
2619 | * If no default placement scheme is given, select an appropriate one | |
2620 | */ | |
1da177e4 | 2621 | if (!this->autooob) { |
61b03bd7 | 2622 | switch (mtd->oobsize) { |
1da177e4 LT |
2623 | case 8: |
2624 | this->autooob = &nand_oob_8; | |
2625 | break; | |
2626 | case 16: | |
2627 | this->autooob = &nand_oob_16; | |
2628 | break; | |
2629 | case 64: | |
2630 | this->autooob = &nand_oob_64; | |
2631 | break; | |
2632 | default: | |
7aa65bfd TG |
2633 | printk(KERN_WARNING "No oob scheme defined for " |
2634 | "oobsize %d\n", mtd->oobsize); | |
1da177e4 LT |
2635 | BUG(); |
2636 | } | |
2637 | } | |
61b03bd7 | 2638 | |
7aa65bfd TG |
2639 | /* |
2640 | * The number of bytes available for the filesystem to place fs | |
2641 | * dependend oob data | |
2642 | */ | |
998cf640 TG |
2643 | mtd->oobavail = 0; |
2644 | for (i = 0; this->autooob->oobfree[i][1]; i++) | |
2645 | mtd->oobavail += this->autooob->oobfree[i][1]; | |
1da177e4 | 2646 | |
61b03bd7 | 2647 | /* |
7aa65bfd TG |
2648 | * check ECC mode, default to software if 3byte/512byte hardware ECC is |
2649 | * selected and we have 256 byte pagesize fallback to software ECC | |
e0c7d767 | 2650 | */ |
7aa65bfd | 2651 | this->eccsize = 256; |
1da177e4 LT |
2652 | this->eccbytes = 3; |
2653 | ||
2654 | switch (this->eccmode) { | |
2655 | case NAND_ECC_HW12_2048: | |
2656 | if (mtd->oobblock < 2048) { | |
7aa65bfd TG |
2657 | printk(KERN_WARNING "2048 byte HW ECC not possible on " |
2658 | "%d byte page size, fallback to SW ECC\n", | |
1da177e4 LT |
2659 | mtd->oobblock); |
2660 | this->eccmode = NAND_ECC_SOFT; | |
2661 | this->calculate_ecc = nand_calculate_ecc; | |
2662 | this->correct_data = nand_correct_data; | |
2663 | } else | |
2664 | this->eccsize = 2048; | |
2665 | break; | |
2666 | ||
61b03bd7 TG |
2667 | case NAND_ECC_HW3_512: |
2668 | case NAND_ECC_HW6_512: | |
2669 | case NAND_ECC_HW8_512: | |
1da177e4 | 2670 | if (mtd->oobblock == 256) { |
7aa65bfd TG |
2671 | printk(KERN_WARNING "512 byte HW ECC not possible on " |
2672 | "256 Byte pagesize, fallback to SW ECC \n"); | |
1da177e4 LT |
2673 | this->eccmode = NAND_ECC_SOFT; |
2674 | this->calculate_ecc = nand_calculate_ecc; | |
2675 | this->correct_data = nand_correct_data; | |
61b03bd7 | 2676 | } else |
e0c7d767 | 2677 | this->eccsize = 512; /* set eccsize to 512 */ |
1da177e4 | 2678 | break; |
61b03bd7 | 2679 | |
1da177e4 LT |
2680 | case NAND_ECC_HW3_256: |
2681 | break; | |
61b03bd7 TG |
2682 | |
2683 | case NAND_ECC_NONE: | |
7aa65bfd TG |
2684 | printk(KERN_WARNING "NAND_ECC_NONE selected by board driver. " |
2685 | "This is not recommended !!\n"); | |
1da177e4 LT |
2686 | this->eccmode = NAND_ECC_NONE; |
2687 | break; | |
2688 | ||
61b03bd7 | 2689 | case NAND_ECC_SOFT: |
1da177e4 LT |
2690 | this->calculate_ecc = nand_calculate_ecc; |
2691 | this->correct_data = nand_correct_data; | |
2692 | break; | |
2693 | ||
2694 | default: | |
7aa65bfd TG |
2695 | printk(KERN_WARNING "Invalid NAND_ECC_MODE %d\n", |
2696 | this->eccmode); | |
61b03bd7 TG |
2697 | BUG(); |
2698 | } | |
1da177e4 | 2699 | |
7aa65bfd TG |
2700 | /* |
2701 | * Check hardware ecc function availability and adjust number of ecc | |
2702 | * bytes per calculation step | |
e0c7d767 | 2703 | */ |
1da177e4 LT |
2704 | switch (this->eccmode) { |
2705 | case NAND_ECC_HW12_2048: | |
2706 | this->eccbytes += 4; | |
61b03bd7 | 2707 | case NAND_ECC_HW8_512: |
1da177e4 | 2708 | this->eccbytes += 2; |
61b03bd7 | 2709 | case NAND_ECC_HW6_512: |
1da177e4 | 2710 | this->eccbytes += 3; |
61b03bd7 | 2711 | case NAND_ECC_HW3_512: |
1da177e4 | 2712 | case NAND_ECC_HW3_256: |
7aa65bfd TG |
2713 | if (this->calculate_ecc && this->correct_data && |
2714 | this->enable_hwecc) | |
1da177e4 | 2715 | break; |
7aa65bfd TG |
2716 | printk(KERN_WARNING "No ECC functions supplied, " |
2717 | "Hardware ECC not possible\n"); | |
61b03bd7 | 2718 | BUG(); |
1da177e4 | 2719 | } |
61b03bd7 | 2720 | |
1da177e4 | 2721 | mtd->eccsize = this->eccsize; |
61b03bd7 | 2722 | |
7aa65bfd TG |
2723 | /* |
2724 | * Set the number of read / write steps for one page depending on ECC | |
2725 | * mode | |
2726 | */ | |
1da177e4 LT |
2727 | switch (this->eccmode) { |
2728 | case NAND_ECC_HW12_2048: | |
2729 | this->eccsteps = mtd->oobblock / 2048; | |
2730 | break; | |
2731 | case NAND_ECC_HW3_512: | |
2732 | case NAND_ECC_HW6_512: | |
2733 | case NAND_ECC_HW8_512: | |
2734 | this->eccsteps = mtd->oobblock / 512; | |
2735 | break; | |
2736 | case NAND_ECC_HW3_256: | |
61b03bd7 | 2737 | case NAND_ECC_SOFT: |
1da177e4 LT |
2738 | this->eccsteps = mtd->oobblock / 256; |
2739 | break; | |
61b03bd7 TG |
2740 | |
2741 | case NAND_ECC_NONE: | |
1da177e4 LT |
2742 | this->eccsteps = 1; |
2743 | break; | |
2744 | } | |
61b03bd7 | 2745 | |
1da177e4 LT |
2746 | /* Initialize state, waitqueue and spinlock */ |
2747 | this->state = FL_READY; | |
a36ed299 TG |
2748 | init_waitqueue_head(&this->controller->wq); |
2749 | spin_lock_init(&this->controller->lock); | |
1da177e4 LT |
2750 | |
2751 | /* De-select the device */ | |
2752 | this->select_chip(mtd, -1); | |
2753 | ||
2754 | /* Invalidate the pagebuffer reference */ | |
2755 | this->pagebuf = -1; | |
2756 | ||
2757 | /* Fill in remaining MTD driver data */ | |
2758 | mtd->type = MTD_NANDFLASH; | |
2759 | mtd->flags = MTD_CAP_NANDFLASH | MTD_ECC; | |
2760 | mtd->ecctype = MTD_ECC_SW; | |
2761 | mtd->erase = nand_erase; | |
2762 | mtd->point = NULL; | |
2763 | mtd->unpoint = NULL; | |
2764 | mtd->read = nand_read; | |
2765 | mtd->write = nand_write; | |
2766 | mtd->read_ecc = nand_read_ecc; | |
2767 | mtd->write_ecc = nand_write_ecc; | |
2768 | mtd->read_oob = nand_read_oob; | |
2769 | mtd->write_oob = nand_write_oob; | |
2770 | mtd->readv = NULL; | |
2771 | mtd->writev = nand_writev; | |
2772 | mtd->writev_ecc = nand_writev_ecc; | |
2773 | mtd->sync = nand_sync; | |
2774 | mtd->lock = NULL; | |
2775 | mtd->unlock = NULL; | |
962034f4 VW |
2776 | mtd->suspend = nand_suspend; |
2777 | mtd->resume = nand_resume; | |
1da177e4 LT |
2778 | mtd->block_isbad = nand_block_isbad; |
2779 | mtd->block_markbad = nand_block_markbad; | |
2780 | ||
2781 | /* and make the autooob the default one */ | |
2782 | memcpy(&mtd->oobinfo, this->autooob, sizeof(mtd->oobinfo)); | |
2783 | ||
0040bf38 TG |
2784 | /* Check, if we should skip the bad block table scan */ |
2785 | if (this->options & NAND_SKIP_BBTSCAN) | |
2786 | return 0; | |
1da177e4 LT |
2787 | |
2788 | /* Build bad block table */ | |
e0c7d767 | 2789 | return this->scan_bbt(mtd); |
1da177e4 LT |
2790 | } |
2791 | ||
2792 | /** | |
61b03bd7 | 2793 | * nand_release - [NAND Interface] Free resources held by the NAND device |
1da177e4 LT |
2794 | * @mtd: MTD device structure |
2795 | */ | |
e0c7d767 | 2796 | void nand_release(struct mtd_info *mtd) |
1da177e4 LT |
2797 | { |
2798 | struct nand_chip *this = mtd->priv; | |
2799 | ||
2800 | #ifdef CONFIG_MTD_PARTITIONS | |
2801 | /* Deregister partitions */ | |
e0c7d767 | 2802 | del_mtd_partitions(mtd); |
1da177e4 LT |
2803 | #endif |
2804 | /* Deregister the device */ | |
e0c7d767 | 2805 | del_mtd_device(mtd); |
1da177e4 | 2806 | |
fa671646 | 2807 | /* Free bad block table memory */ |
e0c7d767 | 2808 | kfree(this->bbt); |
a36ed299 TG |
2809 | /* Free buffers */ |
2810 | nand_free_kmem(this); | |
1da177e4 LT |
2811 | } |
2812 | ||
e0c7d767 DW |
2813 | EXPORT_SYMBOL_GPL(nand_scan); |
2814 | EXPORT_SYMBOL_GPL(nand_release); | |
8fe833c1 RP |
2815 | |
2816 | static int __init nand_base_init(void) | |
2817 | { | |
2818 | led_trigger_register_simple("nand-disk", &nand_led_trigger); | |
2819 | return 0; | |
2820 | } | |
2821 | ||
2822 | static void __exit nand_base_exit(void) | |
2823 | { | |
2824 | led_trigger_unregister_simple(nand_led_trigger); | |
2825 | } | |
2826 | ||
2827 | module_init(nand_base_init); | |
2828 | module_exit(nand_base_exit); | |
2829 | ||
e0c7d767 DW |
2830 | MODULE_LICENSE("GPL"); |
2831 | MODULE_AUTHOR("Steven J. Hill <sjhill@realitydiluted.com>, Thomas Gleixner <tglx@linutronix.de>"); | |
2832 | MODULE_DESCRIPTION("Generic NAND flash driver code"); |