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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); |
2c0a2bed | 142 | static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, |
58dd8f2b | 143 | size_t *retlen, uint8_t *buf); |
2c0a2bed | 144 | static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, |
58dd8f2b | 145 | size_t *retlen, const uint8_t *buf); |
2c0a2bed | 146 | static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, |
58dd8f2b | 147 | size_t *retlen, const uint8_t *buf); |
e0c7d767 DW |
148 | static int nand_erase(struct mtd_info *mtd, struct erase_info *instr); |
149 | static void nand_sync(struct mtd_info *mtd); | |
1da177e4 LT |
150 | |
151 | /* Some internal functions */ | |
2c0a2bed | 152 | static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, |
58dd8f2b | 153 | int page, uint8_t * oob_buf, |
e0c7d767 | 154 | struct nand_oobinfo *oobsel, int mode); |
1da177e4 | 155 | #ifdef CONFIG_MTD_NAND_VERIFY_WRITE |
2c0a2bed | 156 | static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, |
58dd8f2b | 157 | int page, int numpages, uint8_t *oob_buf, |
2c0a2bed TG |
158 | struct nand_oobinfo *oobsel, int chipnr, |
159 | int oobmode); | |
1da177e4 LT |
160 | #else |
161 | #define nand_verify_pages(...) (0) | |
162 | #endif | |
61b03bd7 | 163 | |
2c0a2bed TG |
164 | static int nand_get_device(struct nand_chip *this, struct mtd_info *mtd, |
165 | int new_state); | |
1da177e4 | 166 | |
d470a97c TG |
167 | /* |
168 | * For devices which display every fart in the system on a seperate LED. Is | |
169 | * compiled away when LED support is disabled. | |
170 | */ | |
171 | DEFINE_LED_TRIGGER(nand_led_trigger); | |
172 | ||
1da177e4 LT |
173 | /** |
174 | * nand_release_device - [GENERIC] release chip | |
175 | * @mtd: MTD device structure | |
61b03bd7 TG |
176 | * |
177 | * Deselect, release chip lock and wake up anyone waiting on the device | |
1da177e4 | 178 | */ |
e0c7d767 | 179 | static void nand_release_device(struct mtd_info *mtd) |
1da177e4 LT |
180 | { |
181 | struct nand_chip *this = mtd->priv; | |
182 | ||
183 | /* De-select the NAND device */ | |
184 | this->select_chip(mtd, -1); | |
0dfc6246 | 185 | |
a36ed299 TG |
186 | /* Release the controller and the chip */ |
187 | spin_lock(&this->controller->lock); | |
188 | this->controller->active = NULL; | |
189 | this->state = FL_READY; | |
190 | wake_up(&this->controller->wq); | |
191 | spin_unlock(&this->controller->lock); | |
1da177e4 LT |
192 | } |
193 | ||
194 | /** | |
195 | * nand_read_byte - [DEFAULT] read one byte from the chip | |
196 | * @mtd: MTD device structure | |
197 | * | |
198 | * Default read function for 8bit buswith | |
199 | */ | |
58dd8f2b | 200 | static uint8_t nand_read_byte(struct mtd_info *mtd) |
1da177e4 LT |
201 | { |
202 | struct nand_chip *this = mtd->priv; | |
203 | return readb(this->IO_ADDR_R); | |
204 | } | |
205 | ||
1da177e4 LT |
206 | /** |
207 | * nand_read_byte16 - [DEFAULT] read one byte endianess aware from the chip | |
208 | * @mtd: MTD device structure | |
209 | * | |
61b03bd7 | 210 | * Default read function for 16bit buswith with |
1da177e4 LT |
211 | * endianess conversion |
212 | */ | |
58dd8f2b | 213 | static uint8_t nand_read_byte16(struct mtd_info *mtd) |
1da177e4 LT |
214 | { |
215 | struct nand_chip *this = mtd->priv; | |
58dd8f2b | 216 | return (uint8_t) cpu_to_le16(readw(this->IO_ADDR_R)); |
1da177e4 LT |
217 | } |
218 | ||
1da177e4 LT |
219 | /** |
220 | * nand_read_word - [DEFAULT] read one word from the chip | |
221 | * @mtd: MTD device structure | |
222 | * | |
61b03bd7 | 223 | * Default read function for 16bit buswith without |
1da177e4 LT |
224 | * endianess conversion |
225 | */ | |
226 | static u16 nand_read_word(struct mtd_info *mtd) | |
227 | { | |
228 | struct nand_chip *this = mtd->priv; | |
229 | return readw(this->IO_ADDR_R); | |
230 | } | |
231 | ||
1da177e4 LT |
232 | /** |
233 | * nand_select_chip - [DEFAULT] control CE line | |
234 | * @mtd: MTD device structure | |
235 | * @chip: chipnumber to select, -1 for deselect | |
236 | * | |
237 | * Default select function for 1 chip devices. | |
238 | */ | |
239 | static void nand_select_chip(struct mtd_info *mtd, int chip) | |
240 | { | |
241 | struct nand_chip *this = mtd->priv; | |
e0c7d767 | 242 | switch (chip) { |
1da177e4 | 243 | case -1: |
7abd3ef9 | 244 | this->cmd_ctrl(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); |
1da177e4 LT |
245 | break; |
246 | case 0: | |
7abd3ef9 | 247 | this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
1da177e4 LT |
248 | break; |
249 | ||
250 | default: | |
251 | BUG(); | |
252 | } | |
253 | } | |
254 | ||
255 | /** | |
256 | * nand_write_buf - [DEFAULT] write buffer to chip | |
257 | * @mtd: MTD device structure | |
258 | * @buf: data buffer | |
259 | * @len: number of bytes to write | |
260 | * | |
261 | * Default write function for 8bit buswith | |
262 | */ | |
58dd8f2b | 263 | static void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) |
1da177e4 LT |
264 | { |
265 | int i; | |
266 | struct nand_chip *this = mtd->priv; | |
267 | ||
e0c7d767 | 268 | for (i = 0; i < len; i++) |
1da177e4 LT |
269 | writeb(buf[i], this->IO_ADDR_W); |
270 | } | |
271 | ||
272 | /** | |
61b03bd7 | 273 | * nand_read_buf - [DEFAULT] read chip data into buffer |
1da177e4 LT |
274 | * @mtd: MTD device structure |
275 | * @buf: buffer to store date | |
276 | * @len: number of bytes to read | |
277 | * | |
278 | * Default read function for 8bit buswith | |
279 | */ | |
58dd8f2b | 280 | static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) |
1da177e4 LT |
281 | { |
282 | int i; | |
283 | struct nand_chip *this = mtd->priv; | |
284 | ||
e0c7d767 | 285 | for (i = 0; i < len; i++) |
1da177e4 LT |
286 | buf[i] = readb(this->IO_ADDR_R); |
287 | } | |
288 | ||
289 | /** | |
61b03bd7 | 290 | * nand_verify_buf - [DEFAULT] Verify chip data against buffer |
1da177e4 LT |
291 | * @mtd: MTD device structure |
292 | * @buf: buffer containing the data to compare | |
293 | * @len: number of bytes to compare | |
294 | * | |
295 | * Default verify function for 8bit buswith | |
296 | */ | |
58dd8f2b | 297 | static int nand_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len) |
1da177e4 LT |
298 | { |
299 | int i; | |
300 | struct nand_chip *this = mtd->priv; | |
301 | ||
e0c7d767 | 302 | for (i = 0; i < len; i++) |
1da177e4 LT |
303 | if (buf[i] != readb(this->IO_ADDR_R)) |
304 | return -EFAULT; | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
309 | /** | |
310 | * nand_write_buf16 - [DEFAULT] write buffer to chip | |
311 | * @mtd: MTD device structure | |
312 | * @buf: data buffer | |
313 | * @len: number of bytes to write | |
314 | * | |
315 | * Default write function for 16bit buswith | |
316 | */ | |
58dd8f2b | 317 | static void nand_write_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) |
1da177e4 LT |
318 | { |
319 | int i; | |
320 | struct nand_chip *this = mtd->priv; | |
321 | u16 *p = (u16 *) buf; | |
322 | len >>= 1; | |
61b03bd7 | 323 | |
e0c7d767 | 324 | for (i = 0; i < len; i++) |
1da177e4 | 325 | writew(p[i], this->IO_ADDR_W); |
61b03bd7 | 326 | |
1da177e4 LT |
327 | } |
328 | ||
329 | /** | |
61b03bd7 | 330 | * nand_read_buf16 - [DEFAULT] read chip data into buffer |
1da177e4 LT |
331 | * @mtd: MTD device structure |
332 | * @buf: buffer to store date | |
333 | * @len: number of bytes to read | |
334 | * | |
335 | * Default read function for 16bit buswith | |
336 | */ | |
58dd8f2b | 337 | static void nand_read_buf16(struct mtd_info *mtd, uint8_t *buf, int len) |
1da177e4 LT |
338 | { |
339 | int i; | |
340 | struct nand_chip *this = mtd->priv; | |
341 | u16 *p = (u16 *) buf; | |
342 | len >>= 1; | |
343 | ||
e0c7d767 | 344 | for (i = 0; i < len; i++) |
1da177e4 LT |
345 | p[i] = readw(this->IO_ADDR_R); |
346 | } | |
347 | ||
348 | /** | |
61b03bd7 | 349 | * nand_verify_buf16 - [DEFAULT] Verify chip data against buffer |
1da177e4 LT |
350 | * @mtd: MTD device structure |
351 | * @buf: buffer containing the data to compare | |
352 | * @len: number of bytes to compare | |
353 | * | |
354 | * Default verify function for 16bit buswith | |
355 | */ | |
58dd8f2b | 356 | static int nand_verify_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) |
1da177e4 LT |
357 | { |
358 | int i; | |
359 | struct nand_chip *this = mtd->priv; | |
360 | u16 *p = (u16 *) buf; | |
361 | len >>= 1; | |
362 | ||
e0c7d767 | 363 | for (i = 0; i < len; i++) |
1da177e4 LT |
364 | if (p[i] != readw(this->IO_ADDR_R)) |
365 | return -EFAULT; | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
370 | /** | |
371 | * nand_block_bad - [DEFAULT] Read bad block marker from the chip | |
372 | * @mtd: MTD device structure | |
373 | * @ofs: offset from device start | |
374 | * @getchip: 0, if the chip is already selected | |
375 | * | |
61b03bd7 | 376 | * Check, if the block is bad. |
1da177e4 LT |
377 | */ |
378 | static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) | |
379 | { | |
380 | int page, chipnr, res = 0; | |
381 | struct nand_chip *this = mtd->priv; | |
382 | u16 bad; | |
383 | ||
384 | if (getchip) { | |
385 | page = (int)(ofs >> this->page_shift); | |
386 | chipnr = (int)(ofs >> this->chip_shift); | |
387 | ||
388 | /* Grab the lock and see if the device is available */ | |
e0c7d767 | 389 | nand_get_device(this, mtd, FL_READING); |
1da177e4 LT |
390 | |
391 | /* Select the NAND device */ | |
392 | this->select_chip(mtd, chipnr); | |
61b03bd7 | 393 | } else |
e0c7d767 | 394 | page = (int)ofs; |
1da177e4 LT |
395 | |
396 | if (this->options & NAND_BUSWIDTH_16) { | |
2c0a2bed TG |
397 | this->cmdfunc(mtd, NAND_CMD_READOOB, this->badblockpos & 0xFE, |
398 | page & this->pagemask); | |
1da177e4 LT |
399 | bad = cpu_to_le16(this->read_word(mtd)); |
400 | if (this->badblockpos & 0x1) | |
49196f33 | 401 | bad >>= 8; |
1da177e4 LT |
402 | if ((bad & 0xFF) != 0xff) |
403 | res = 1; | |
404 | } else { | |
2c0a2bed TG |
405 | this->cmdfunc(mtd, NAND_CMD_READOOB, this->badblockpos, |
406 | page & this->pagemask); | |
1da177e4 LT |
407 | if (this->read_byte(mtd) != 0xff) |
408 | res = 1; | |
409 | } | |
61b03bd7 | 410 | |
1da177e4 LT |
411 | if (getchip) { |
412 | /* Deselect and wake up anyone waiting on the device */ | |
413 | nand_release_device(mtd); | |
61b03bd7 TG |
414 | } |
415 | ||
1da177e4 LT |
416 | return res; |
417 | } | |
418 | ||
419 | /** | |
420 | * nand_default_block_markbad - [DEFAULT] mark a block bad | |
421 | * @mtd: MTD device structure | |
422 | * @ofs: offset from device start | |
423 | * | |
424 | * This is the default implementation, which can be overridden by | |
425 | * a hardware specific driver. | |
426 | */ | |
427 | static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs) | |
428 | { | |
429 | struct nand_chip *this = mtd->priv; | |
58dd8f2b | 430 | uint8_t buf[2] = { 0, 0 }; |
e0c7d767 | 431 | size_t retlen; |
1da177e4 | 432 | int block; |
61b03bd7 | 433 | |
1da177e4 | 434 | /* Get block number */ |
e0c7d767 | 435 | block = ((int)ofs) >> this->bbt_erase_shift; |
41ce9214 AB |
436 | if (this->bbt) |
437 | this->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1); | |
1da177e4 LT |
438 | |
439 | /* Do we have a flash based bad block table ? */ | |
440 | if (this->options & NAND_USE_FLASH_BBT) | |
e0c7d767 | 441 | return nand_update_bbt(mtd, ofs); |
61b03bd7 | 442 | |
1da177e4 LT |
443 | /* We write two bytes, so we dont have to mess with 16 bit access */ |
444 | ofs += mtd->oobsize + (this->badblockpos & ~0x01); | |
e0c7d767 | 445 | return nand_write_oob(mtd, ofs, 2, &retlen, buf); |
1da177e4 LT |
446 | } |
447 | ||
61b03bd7 | 448 | /** |
1da177e4 LT |
449 | * nand_check_wp - [GENERIC] check if the chip is write protected |
450 | * @mtd: MTD device structure | |
61b03bd7 | 451 | * Check, if the device is write protected |
1da177e4 | 452 | * |
61b03bd7 | 453 | * The function expects, that the device is already selected |
1da177e4 | 454 | */ |
e0c7d767 | 455 | static int nand_check_wp(struct mtd_info *mtd) |
1da177e4 LT |
456 | { |
457 | struct nand_chip *this = mtd->priv; | |
458 | /* Check the WP bit */ | |
e0c7d767 | 459 | this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); |
61b03bd7 | 460 | return (this->read_byte(mtd) & NAND_STATUS_WP) ? 0 : 1; |
1da177e4 LT |
461 | } |
462 | ||
463 | /** | |
464 | * nand_block_checkbad - [GENERIC] Check if a block is marked bad | |
465 | * @mtd: MTD device structure | |
466 | * @ofs: offset from device start | |
467 | * @getchip: 0, if the chip is already selected | |
468 | * @allowbbt: 1, if its allowed to access the bbt area | |
469 | * | |
470 | * Check, if the block is bad. Either by reading the bad block table or | |
471 | * calling of the scan function. | |
472 | */ | |
2c0a2bed TG |
473 | static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, |
474 | int allowbbt) | |
1da177e4 LT |
475 | { |
476 | struct nand_chip *this = mtd->priv; | |
61b03bd7 | 477 | |
1da177e4 LT |
478 | if (!this->bbt) |
479 | return this->block_bad(mtd, ofs, getchip); | |
61b03bd7 | 480 | |
1da177e4 | 481 | /* Return info from the table */ |
e0c7d767 | 482 | return nand_isbad_bbt(mtd, ofs, allowbbt); |
1da177e4 LT |
483 | } |
484 | ||
61b03bd7 | 485 | /* |
3b88775c TG |
486 | * Wait for the ready pin, after a command |
487 | * The timeout is catched later. | |
488 | */ | |
489 | static void nand_wait_ready(struct mtd_info *mtd) | |
490 | { | |
491 | struct nand_chip *this = mtd->priv; | |
e0c7d767 | 492 | unsigned long timeo = jiffies + 2; |
3b88775c | 493 | |
8fe833c1 | 494 | led_trigger_event(nand_led_trigger, LED_FULL); |
3b88775c TG |
495 | /* wait until command is processed or timeout occures */ |
496 | do { | |
497 | if (this->dev_ready(mtd)) | |
8fe833c1 | 498 | break; |
8446f1d3 | 499 | touch_softlockup_watchdog(); |
61b03bd7 | 500 | } while (time_before(jiffies, timeo)); |
8fe833c1 | 501 | led_trigger_event(nand_led_trigger, LED_OFF); |
3b88775c TG |
502 | } |
503 | ||
1da177e4 LT |
504 | /** |
505 | * nand_command - [DEFAULT] Send command to NAND device | |
506 | * @mtd: MTD device structure | |
507 | * @command: the command to be sent | |
508 | * @column: the column address for this command, -1 if none | |
509 | * @page_addr: the page address for this command, -1 if none | |
510 | * | |
511 | * Send command to NAND device. This function is used for small page | |
512 | * devices (256/512 Bytes per page) | |
513 | */ | |
7abd3ef9 TG |
514 | static void nand_command(struct mtd_info *mtd, unsigned int command, |
515 | int column, int page_addr) | |
1da177e4 LT |
516 | { |
517 | register struct nand_chip *this = mtd->priv; | |
7abd3ef9 | 518 | int ctrl = NAND_CTRL_CLE | NAND_CTRL_CHANGE; |
1da177e4 | 519 | |
1da177e4 LT |
520 | /* |
521 | * Write out the command to the device. | |
522 | */ | |
523 | if (command == NAND_CMD_SEQIN) { | |
524 | int readcmd; | |
525 | ||
28318776 | 526 | if (column >= mtd->writesize) { |
1da177e4 | 527 | /* OOB area */ |
28318776 | 528 | column -= mtd->writesize; |
1da177e4 LT |
529 | readcmd = NAND_CMD_READOOB; |
530 | } else if (column < 256) { | |
531 | /* First 256 bytes --> READ0 */ | |
532 | readcmd = NAND_CMD_READ0; | |
533 | } else { | |
534 | column -= 256; | |
535 | readcmd = NAND_CMD_READ1; | |
536 | } | |
7abd3ef9 TG |
537 | this->cmd_ctrl(mtd, readcmd, ctrl); |
538 | ctrl &= ~NAND_CTRL_CHANGE; | |
1da177e4 | 539 | } |
7abd3ef9 | 540 | this->cmd_ctrl(mtd, command, ctrl); |
1da177e4 | 541 | |
7abd3ef9 TG |
542 | /* |
543 | * Address cycle, when necessary | |
544 | */ | |
545 | ctrl = NAND_CTRL_ALE | NAND_CTRL_CHANGE; | |
546 | /* Serially input address */ | |
547 | if (column != -1) { | |
548 | /* Adjust columns for 16 bit buswidth */ | |
549 | if (this->options & NAND_BUSWIDTH_16) | |
550 | column >>= 1; | |
551 | this->cmd_ctrl(mtd, column, ctrl); | |
552 | ctrl &= ~NAND_CTRL_CHANGE; | |
553 | } | |
554 | if (page_addr != -1) { | |
555 | this->cmd_ctrl(mtd, page_addr, ctrl); | |
556 | ctrl &= ~NAND_CTRL_CHANGE; | |
557 | this->cmd_ctrl(mtd, page_addr >> 8, ctrl); | |
558 | /* One more address cycle for devices > 32MiB */ | |
559 | if (this->chipsize > (32 << 20)) | |
560 | this->cmd_ctrl(mtd, page_addr >> 16, ctrl); | |
1da177e4 | 561 | } |
7abd3ef9 | 562 | this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
61b03bd7 TG |
563 | |
564 | /* | |
565 | * program and erase have their own busy handlers | |
1da177e4 | 566 | * status and sequential in needs no delay |
e0c7d767 | 567 | */ |
1da177e4 | 568 | switch (command) { |
61b03bd7 | 569 | |
1da177e4 LT |
570 | case NAND_CMD_PAGEPROG: |
571 | case NAND_CMD_ERASE1: | |
572 | case NAND_CMD_ERASE2: | |
573 | case NAND_CMD_SEQIN: | |
574 | case NAND_CMD_STATUS: | |
7abd3ef9 | 575 | this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE); |
1da177e4 LT |
576 | return; |
577 | ||
578 | case NAND_CMD_RESET: | |
61b03bd7 | 579 | if (this->dev_ready) |
1da177e4 LT |
580 | break; |
581 | udelay(this->chip_delay); | |
7abd3ef9 TG |
582 | this->cmd_ctrl(mtd, NAND_CMD_STATUS, |
583 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
584 | this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE); | |
e0c7d767 | 585 | while (!(this->read_byte(mtd) & NAND_STATUS_READY)) ; |
1da177e4 LT |
586 | return; |
587 | ||
e0c7d767 | 588 | /* This applies to read commands */ |
1da177e4 | 589 | default: |
61b03bd7 | 590 | /* |
1da177e4 LT |
591 | * If we don't have access to the busy pin, we apply the given |
592 | * command delay | |
e0c7d767 | 593 | */ |
1da177e4 | 594 | if (!this->dev_ready) { |
e0c7d767 | 595 | udelay(this->chip_delay); |
1da177e4 | 596 | return; |
61b03bd7 | 597 | } |
1da177e4 | 598 | } |
1da177e4 LT |
599 | /* Apply this short delay always to ensure that we do wait tWB in |
600 | * any case on any machine. */ | |
e0c7d767 | 601 | ndelay(100); |
3b88775c TG |
602 | |
603 | nand_wait_ready(mtd); | |
1da177e4 LT |
604 | } |
605 | ||
606 | /** | |
607 | * nand_command_lp - [DEFAULT] Send command to NAND large page device | |
608 | * @mtd: MTD device structure | |
609 | * @command: the command to be sent | |
610 | * @column: the column address for this command, -1 if none | |
611 | * @page_addr: the page address for this command, -1 if none | |
612 | * | |
7abd3ef9 TG |
613 | * Send command to NAND device. This is the version for the new large page |
614 | * devices We dont have the separate regions as we have in the small page | |
615 | * devices. We must emulate NAND_CMD_READOOB to keep the code compatible. | |
1da177e4 LT |
616 | * |
617 | */ | |
7abd3ef9 TG |
618 | static void nand_command_lp(struct mtd_info *mtd, unsigned int command, |
619 | int column, int page_addr) | |
1da177e4 LT |
620 | { |
621 | register struct nand_chip *this = mtd->priv; | |
622 | ||
623 | /* Emulate NAND_CMD_READOOB */ | |
624 | if (command == NAND_CMD_READOOB) { | |
28318776 | 625 | column += mtd->writesize; |
1da177e4 LT |
626 | command = NAND_CMD_READ0; |
627 | } | |
61b03bd7 | 628 | |
7abd3ef9 TG |
629 | /* Command latch cycle */ |
630 | this->cmd_ctrl(mtd, command & 0xff, | |
631 | NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE); | |
1da177e4 LT |
632 | |
633 | if (column != -1 || page_addr != -1) { | |
7abd3ef9 | 634 | int ctrl = NAND_CTRL_CHANGE | NAND_NCE | NAND_ALE; |
1da177e4 LT |
635 | |
636 | /* Serially input address */ | |
637 | if (column != -1) { | |
638 | /* Adjust columns for 16 bit buswidth */ | |
639 | if (this->options & NAND_BUSWIDTH_16) | |
640 | column >>= 1; | |
7abd3ef9 TG |
641 | this->cmd_ctrl(mtd, column, ctrl); |
642 | ctrl &= ~NAND_CTRL_CHANGE; | |
643 | this->cmd_ctrl(mtd, column >> 8, ctrl); | |
61b03bd7 | 644 | } |
1da177e4 | 645 | if (page_addr != -1) { |
7abd3ef9 TG |
646 | this->cmd_ctrl(mtd, page_addr, ctrl); |
647 | this->cmd_ctrl(mtd, page_addr >> 8, | |
648 | NAND_NCE | NAND_ALE); | |
1da177e4 LT |
649 | /* One more address cycle for devices > 128MiB */ |
650 | if (this->chipsize > (128 << 20)) | |
7abd3ef9 TG |
651 | this->cmd_ctrl(mtd, page_addr >> 16, |
652 | NAND_NCE | NAND_ALE); | |
1da177e4 | 653 | } |
1da177e4 | 654 | } |
7abd3ef9 | 655 | this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
61b03bd7 TG |
656 | |
657 | /* | |
658 | * program and erase have their own busy handlers | |
30f464b7 DM |
659 | * status, sequential in, and deplete1 need no delay |
660 | */ | |
1da177e4 | 661 | switch (command) { |
61b03bd7 | 662 | |
1da177e4 LT |
663 | case NAND_CMD_CACHEDPROG: |
664 | case NAND_CMD_PAGEPROG: | |
665 | case NAND_CMD_ERASE1: | |
666 | case NAND_CMD_ERASE2: | |
667 | case NAND_CMD_SEQIN: | |
668 | case NAND_CMD_STATUS: | |
30f464b7 | 669 | case NAND_CMD_DEPLETE1: |
1da177e4 LT |
670 | return; |
671 | ||
e0c7d767 DW |
672 | /* |
673 | * read error status commands require only a short delay | |
674 | */ | |
30f464b7 DM |
675 | case NAND_CMD_STATUS_ERROR: |
676 | case NAND_CMD_STATUS_ERROR0: | |
677 | case NAND_CMD_STATUS_ERROR1: | |
678 | case NAND_CMD_STATUS_ERROR2: | |
679 | case NAND_CMD_STATUS_ERROR3: | |
680 | udelay(this->chip_delay); | |
681 | return; | |
1da177e4 LT |
682 | |
683 | case NAND_CMD_RESET: | |
61b03bd7 | 684 | if (this->dev_ready) |
1da177e4 LT |
685 | break; |
686 | udelay(this->chip_delay); | |
7abd3ef9 TG |
687 | this->cmd_ctrl(mtd, NAND_CMD_STATUS, NAND_NCE | NAND_CLE); |
688 | this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE); | |
e0c7d767 | 689 | while (!(this->read_byte(mtd) & NAND_STATUS_READY)) ; |
1da177e4 LT |
690 | return; |
691 | ||
692 | case NAND_CMD_READ0: | |
7abd3ef9 TG |
693 | this->cmd_ctrl(mtd, NAND_CMD_READSTART, NAND_NCE | NAND_CLE); |
694 | this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE); | |
61b03bd7 | 695 | |
e0c7d767 | 696 | /* This applies to read commands */ |
1da177e4 | 697 | default: |
61b03bd7 | 698 | /* |
1da177e4 LT |
699 | * If we don't have access to the busy pin, we apply the given |
700 | * command delay | |
e0c7d767 | 701 | */ |
1da177e4 | 702 | if (!this->dev_ready) { |
e0c7d767 | 703 | udelay(this->chip_delay); |
1da177e4 | 704 | return; |
61b03bd7 | 705 | } |
1da177e4 | 706 | } |
3b88775c | 707 | |
1da177e4 LT |
708 | /* Apply this short delay always to ensure that we do wait tWB in |
709 | * any case on any machine. */ | |
e0c7d767 | 710 | ndelay(100); |
3b88775c TG |
711 | |
712 | nand_wait_ready(mtd); | |
1da177e4 LT |
713 | } |
714 | ||
715 | /** | |
716 | * nand_get_device - [GENERIC] Get chip for selected access | |
717 | * @this: the nand chip descriptor | |
718 | * @mtd: MTD device structure | |
61b03bd7 | 719 | * @new_state: the state which is requested |
1da177e4 LT |
720 | * |
721 | * Get the device and lock it for exclusive access | |
722 | */ | |
2c0a2bed TG |
723 | static int |
724 | nand_get_device(struct nand_chip *this, struct mtd_info *mtd, int new_state) | |
1da177e4 | 725 | { |
a36ed299 TG |
726 | spinlock_t *lock = &this->controller->lock; |
727 | wait_queue_head_t *wq = &this->controller->wq; | |
e0c7d767 | 728 | DECLARE_WAITQUEUE(wait, current); |
e0c7d767 | 729 | retry: |
0dfc6246 TG |
730 | spin_lock(lock); |
731 | ||
1da177e4 | 732 | /* Hardware controller shared among independend devices */ |
a36ed299 TG |
733 | /* Hardware controller shared among independend devices */ |
734 | if (!this->controller->active) | |
735 | this->controller->active = this; | |
736 | ||
737 | if (this->controller->active == this && this->state == FL_READY) { | |
0dfc6246 TG |
738 | this->state = new_state; |
739 | spin_unlock(lock); | |
962034f4 VW |
740 | return 0; |
741 | } | |
742 | if (new_state == FL_PM_SUSPENDED) { | |
743 | spin_unlock(lock); | |
744 | return (this->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN; | |
0dfc6246 TG |
745 | } |
746 | set_current_state(TASK_UNINTERRUPTIBLE); | |
747 | add_wait_queue(wq, &wait); | |
748 | spin_unlock(lock); | |
749 | schedule(); | |
750 | remove_wait_queue(wq, &wait); | |
1da177e4 LT |
751 | goto retry; |
752 | } | |
753 | ||
754 | /** | |
755 | * nand_wait - [DEFAULT] wait until the command is done | |
756 | * @mtd: MTD device structure | |
757 | * @this: NAND chip structure | |
758 | * @state: state to select the max. timeout value | |
759 | * | |
760 | * Wait for command done. This applies to erase and program only | |
61b03bd7 | 761 | * Erase can take up to 400ms and program up to 20ms according to |
1da177e4 LT |
762 | * general NAND and SmartMedia specs |
763 | * | |
764 | */ | |
765 | static int nand_wait(struct mtd_info *mtd, struct nand_chip *this, int state) | |
766 | { | |
767 | ||
e0c7d767 DW |
768 | unsigned long timeo = jiffies; |
769 | int status; | |
61b03bd7 | 770 | |
1da177e4 | 771 | if (state == FL_ERASING) |
e0c7d767 | 772 | timeo += (HZ * 400) / 1000; |
1da177e4 | 773 | else |
e0c7d767 | 774 | timeo += (HZ * 20) / 1000; |
1da177e4 | 775 | |
8fe833c1 RP |
776 | led_trigger_event(nand_led_trigger, LED_FULL); |
777 | ||
1da177e4 LT |
778 | /* Apply this short delay always to ensure that we do wait tWB in |
779 | * any case on any machine. */ | |
e0c7d767 | 780 | ndelay(100); |
1da177e4 LT |
781 | |
782 | if ((state == FL_ERASING) && (this->options & NAND_IS_AND)) | |
e0c7d767 | 783 | this->cmdfunc(mtd, NAND_CMD_STATUS_MULTI, -1, -1); |
61b03bd7 | 784 | else |
e0c7d767 | 785 | this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); |
1da177e4 | 786 | |
61b03bd7 | 787 | while (time_before(jiffies, timeo)) { |
1da177e4 LT |
788 | /* Check, if we were interrupted */ |
789 | if (this->state != state) | |
790 | return 0; | |
791 | ||
792 | if (this->dev_ready) { | |
793 | if (this->dev_ready(mtd)) | |
61b03bd7 | 794 | break; |
1da177e4 LT |
795 | } else { |
796 | if (this->read_byte(mtd) & NAND_STATUS_READY) | |
797 | break; | |
798 | } | |
20a6c211 | 799 | cond_resched(); |
1da177e4 | 800 | } |
8fe833c1 RP |
801 | led_trigger_event(nand_led_trigger, LED_OFF); |
802 | ||
e0c7d767 | 803 | status = (int)this->read_byte(mtd); |
1da177e4 LT |
804 | return status; |
805 | } | |
806 | ||
807 | /** | |
808 | * nand_write_page - [GENERIC] write one page | |
809 | * @mtd: MTD device structure | |
810 | * @this: NAND chip structure | |
811 | * @page: startpage inside the chip, must be called with (page & this->pagemask) | |
812 | * @oob_buf: out of band data buffer | |
813 | * @oobsel: out of band selecttion structre | |
814 | * @cached: 1 = enable cached programming if supported by chip | |
815 | * | |
816 | * Nand_page_program function is used for write and writev ! | |
817 | * This function will always program a full page of data | |
818 | * If you call it with a non page aligned buffer, you're lost :) | |
819 | * | |
820 | * Cached programming is not supported yet. | |
821 | */ | |
e0c7d767 | 822 | static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, int page, |
58dd8f2b | 823 | uint8_t *oob_buf, struct nand_oobinfo *oobsel, int cached) |
1da177e4 | 824 | { |
e0c7d767 | 825 | int i, status; |
58dd8f2b | 826 | uint8_t ecc_code[32]; |
6dfc6d25 | 827 | int eccmode = oobsel->useecc ? this->ecc.mode : NAND_ECC_NONE; |
e0c7d767 | 828 | int *oob_config = oobsel->eccpos; |
6dfc6d25 | 829 | int datidx = 0, eccidx = 0, eccsteps = this->ecc.steps; |
e0c7d767 | 830 | int eccbytes = 0; |
61b03bd7 | 831 | |
1da177e4 LT |
832 | /* FIXME: Enable cached programming */ |
833 | cached = 0; | |
61b03bd7 | 834 | |
1da177e4 | 835 | /* Send command to begin auto page programming */ |
e0c7d767 | 836 | this->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page); |
1da177e4 LT |
837 | |
838 | /* Write out complete page of data, take care of eccmode */ | |
839 | switch (eccmode) { | |
e0c7d767 | 840 | /* No ecc, write all */ |
1da177e4 | 841 | case NAND_ECC_NONE: |
e0c7d767 | 842 | printk(KERN_WARNING "Writing data without ECC to NAND-FLASH is not recommended\n"); |
28318776 | 843 | this->write_buf(mtd, this->data_poi, mtd->writesize); |
1da177e4 | 844 | break; |
61b03bd7 | 845 | |
e0c7d767 | 846 | /* Software ecc 3/256, write all */ |
1da177e4 LT |
847 | case NAND_ECC_SOFT: |
848 | for (; eccsteps; eccsteps--) { | |
6dfc6d25 | 849 | this->ecc.calculate(mtd, &this->data_poi[datidx], ecc_code); |
1da177e4 LT |
850 | for (i = 0; i < 3; i++, eccidx++) |
851 | oob_buf[oob_config[eccidx]] = ecc_code[i]; | |
6dfc6d25 | 852 | datidx += this->ecc.size; |
1da177e4 | 853 | } |
28318776 | 854 | this->write_buf(mtd, this->data_poi, mtd->writesize); |
1da177e4 LT |
855 | break; |
856 | default: | |
6dfc6d25 | 857 | eccbytes = this->ecc.bytes; |
1da177e4 LT |
858 | for (; eccsteps; eccsteps--) { |
859 | /* enable hardware ecc logic for write */ | |
6dfc6d25 TG |
860 | this->ecc.hwctl(mtd, NAND_ECC_WRITE); |
861 | this->write_buf(mtd, &this->data_poi[datidx], this->ecc.size); | |
862 | this->ecc.calculate(mtd, &this->data_poi[datidx], ecc_code); | |
1da177e4 LT |
863 | for (i = 0; i < eccbytes; i++, eccidx++) |
864 | oob_buf[oob_config[eccidx]] = ecc_code[i]; | |
865 | /* If the hardware ecc provides syndromes then | |
866 | * the ecc code must be written immidiately after | |
867 | * the data bytes (words) */ | |
868 | if (this->options & NAND_HWECC_SYNDROME) | |
869 | this->write_buf(mtd, ecc_code, eccbytes); | |
6dfc6d25 | 870 | datidx += this->ecc.size; |
1da177e4 LT |
871 | } |
872 | break; | |
873 | } | |
61b03bd7 | 874 | |
1da177e4 LT |
875 | /* Write out OOB data */ |
876 | if (this->options & NAND_HWECC_SYNDROME) | |
877 | this->write_buf(mtd, &oob_buf[oobsel->eccbytes], mtd->oobsize - oobsel->eccbytes); | |
61b03bd7 | 878 | else |
1da177e4 LT |
879 | this->write_buf(mtd, oob_buf, mtd->oobsize); |
880 | ||
881 | /* Send command to actually program the data */ | |
e0c7d767 | 882 | this->cmdfunc(mtd, cached ? NAND_CMD_CACHEDPROG : NAND_CMD_PAGEPROG, -1, -1); |
1da177e4 LT |
883 | |
884 | if (!cached) { | |
885 | /* call wait ready function */ | |
e0c7d767 | 886 | status = this->waitfunc(mtd, this, FL_WRITING); |
068e3c0a DM |
887 | |
888 | /* See if operation failed and additional status checks are available */ | |
889 | if ((status & NAND_STATUS_FAIL) && (this->errstat)) { | |
890 | status = this->errstat(mtd, this, FL_WRITING, status, page); | |
891 | } | |
892 | ||
1da177e4 | 893 | /* See if device thinks it succeeded */ |
a4ab4c5d | 894 | if (status & NAND_STATUS_FAIL) { |
e0c7d767 | 895 | DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write, page 0x%08x, ", __FUNCTION__, page); |
1da177e4 LT |
896 | return -EIO; |
897 | } | |
898 | } else { | |
899 | /* FIXME: Implement cached programming ! */ | |
e0c7d767 | 900 | /* wait until cache is ready */ |
1da177e4 LT |
901 | // status = this->waitfunc (mtd, this, FL_CACHEDRPG); |
902 | } | |
61b03bd7 | 903 | return 0; |
1da177e4 LT |
904 | } |
905 | ||
906 | #ifdef CONFIG_MTD_NAND_VERIFY_WRITE | |
907 | /** | |
908 | * nand_verify_pages - [GENERIC] verify the chip contents after a write | |
909 | * @mtd: MTD device structure | |
910 | * @this: NAND chip structure | |
2c0a2bed | 911 | * @page: startpage inside the chip, must be called with (page & this->pagemask) |
1da177e4 LT |
912 | * @numpages: number of pages to verify |
913 | * @oob_buf: out of band data buffer | |
914 | * @oobsel: out of band selecttion structre | |
915 | * @chipnr: number of the current chip | |
916 | * @oobmode: 1 = full buffer verify, 0 = ecc only | |
917 | * | |
918 | * The NAND device assumes that it is always writing to a cleanly erased page. | |
61b03bd7 | 919 | * Hence, it performs its internal write verification only on bits that |
1da177e4 | 920 | * transitioned from 1 to 0. The device does NOT verify the whole page on a |
61b03bd7 TG |
921 | * byte by byte basis. It is possible that the page was not completely erased |
922 | * or the page is becoming unusable due to wear. The read with ECC would catch | |
923 | * the error later when the ECC page check fails, but we would rather catch | |
1da177e4 LT |
924 | * it early in the page write stage. Better to write no data than invalid data. |
925 | */ | |
e0c7d767 | 926 | static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, int page, int numpages, |
58dd8f2b | 927 | uint8_t *oob_buf, struct nand_oobinfo *oobsel, int chipnr, int oobmode) |
1da177e4 | 928 | { |
e0c7d767 DW |
929 | int i, j, datidx = 0, oobofs = 0, res = -EIO; |
930 | int eccsteps = this->eccsteps; | |
931 | int hweccbytes; | |
58dd8f2b | 932 | uint8_t oobdata[64]; |
1da177e4 LT |
933 | |
934 | hweccbytes = (this->options & NAND_HWECC_SYNDROME) ? (oobsel->eccbytes / eccsteps) : 0; | |
935 | ||
936 | /* Send command to read back the first page */ | |
e0c7d767 | 937 | this->cmdfunc(mtd, NAND_CMD_READ0, 0, page); |
1da177e4 | 938 | |
e0c7d767 | 939 | for (;;) { |
1da177e4 LT |
940 | for (j = 0; j < eccsteps; j++) { |
941 | /* Loop through and verify the data */ | |
942 | if (this->verify_buf(mtd, &this->data_poi[datidx], mtd->eccsize)) { | |
e0c7d767 | 943 | DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page); |
1da177e4 LT |
944 | goto out; |
945 | } | |
946 | datidx += mtd->eccsize; | |
947 | /* Have we a hw generator layout ? */ | |
948 | if (!hweccbytes) | |
949 | continue; | |
950 | if (this->verify_buf(mtd, &this->oob_buf[oobofs], hweccbytes)) { | |
e0c7d767 | 951 | DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page); |
1da177e4 LT |
952 | goto out; |
953 | } | |
954 | oobofs += hweccbytes; | |
955 | } | |
956 | ||
957 | /* check, if we must compare all data or if we just have to | |
958 | * compare the ecc bytes | |
959 | */ | |
960 | if (oobmode) { | |
961 | if (this->verify_buf(mtd, &oob_buf[oobofs], mtd->oobsize - hweccbytes * eccsteps)) { | |
e0c7d767 | 962 | DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page); |
1da177e4 LT |
963 | goto out; |
964 | } | |
965 | } else { | |
966 | /* Read always, else autoincrement fails */ | |
967 | this->read_buf(mtd, oobdata, mtd->oobsize - hweccbytes * eccsteps); | |
968 | ||
969 | if (oobsel->useecc != MTD_NANDECC_OFF && !hweccbytes) { | |
970 | int ecccnt = oobsel->eccbytes; | |
61b03bd7 | 971 | |
1da177e4 LT |
972 | for (i = 0; i < ecccnt; i++) { |
973 | int idx = oobsel->eccpos[i]; | |
e0c7d767 DW |
974 | if (oobdata[idx] != oob_buf[oobofs + idx]) { |
975 | DEBUG(MTD_DEBUG_LEVEL0, "%s: Failed ECC write verify, page 0x%08x, %6i bytes were succesful\n", | |
976 | __FUNCTION__, page, i); | |
1da177e4 LT |
977 | goto out; |
978 | } | |
979 | } | |
61b03bd7 | 980 | } |
1da177e4 LT |
981 | } |
982 | oobofs += mtd->oobsize - hweccbytes * eccsteps; | |
983 | page++; | |
984 | numpages--; | |
985 | ||
61b03bd7 | 986 | /* Apply delay or wait for ready/busy pin |
1da177e4 LT |
987 | * Do this before the AUTOINCR check, so no problems |
988 | * arise if a chip which does auto increment | |
989 | * is marked as NOAUTOINCR by the board driver. | |
990 | * Do this also before returning, so the chip is | |
991 | * ready for the next command. | |
e0c7d767 | 992 | */ |
61b03bd7 | 993 | if (!this->dev_ready) |
e0c7d767 | 994 | udelay(this->chip_delay); |
1da177e4 | 995 | else |
3b88775c | 996 | nand_wait_ready(mtd); |
1da177e4 LT |
997 | |
998 | /* All done, return happy */ | |
999 | if (!numpages) | |
1000 | return 0; | |
61b03bd7 | 1001 | |
61b03bd7 | 1002 | /* Check, if the chip supports auto page increment */ |
1da177e4 | 1003 | if (!NAND_CANAUTOINCR(this)) |
e0c7d767 | 1004 | this->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page); |
1da177e4 | 1005 | } |
61b03bd7 | 1006 | /* |
1da177e4 LT |
1007 | * Terminate the read command. We come here in case of an error |
1008 | * So we must issue a reset command. | |
1009 | */ | |
e0c7d767 DW |
1010 | out: |
1011 | this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); | |
1da177e4 LT |
1012 | return res; |
1013 | } | |
1014 | #endif | |
1015 | ||
1016 | /** | |
068e3c0a | 1017 | * nand_read - [MTD Interface] MTD compability function for nand_do_read_ecc |
1da177e4 LT |
1018 | * @mtd: MTD device structure |
1019 | * @from: offset to read from | |
1020 | * @len: number of bytes to read | |
1021 | * @retlen: pointer to variable to store the number of read bytes | |
1022 | * @buf: the databuffer to put data | |
1023 | * | |
068e3c0a DM |
1024 | * This function simply calls nand_do_read_ecc with oob buffer and oobsel = NULL |
1025 | * and flags = 0xff | |
1026 | */ | |
58dd8f2b | 1027 | static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, uint8_t *buf) |
1da177e4 | 1028 | { |
e0c7d767 | 1029 | return nand_do_read_ecc(mtd, from, len, retlen, buf, NULL, &mtd->oobinfo, 0xff); |
22c60f5f | 1030 | } |
1da177e4 | 1031 | |
068e3c0a DM |
1032 | /** |
1033 | * nand_do_read_ecc - [MTD Interface] Read data with ECC | |
1034 | * @mtd: MTD device structure | |
1035 | * @from: offset to read from | |
1036 | * @len: number of bytes to read | |
1037 | * @retlen: pointer to variable to store the number of read bytes | |
1038 | * @buf: the databuffer to put data | |
bb75ba4c | 1039 | * @oob_buf: filesystem supplied oob data buffer (can be NULL) |
22c60f5f | 1040 | * @oobsel: oob selection structure |
068e3c0a DM |
1041 | * @flags: flag to indicate if nand_get_device/nand_release_device should be preformed |
1042 | * and how many corrected error bits are acceptable: | |
1043 | * bits 0..7 - number of tolerable errors | |
1044 | * bit 8 - 0 == do not get/release chip, 1 == get/release chip | |
1045 | * | |
1046 | * NAND read with ECC | |
1047 | */ | |
e0c7d767 | 1048 | int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, |
58dd8f2b | 1049 | size_t *retlen, uint8_t *buf, uint8_t *oob_buf, struct nand_oobinfo *oobsel, int flags) |
1da177e4 | 1050 | { |
22c60f5f | 1051 | |
1da177e4 LT |
1052 | int i, j, col, realpage, page, end, ecc, chipnr, sndcmd = 1; |
1053 | int read = 0, oob = 0, ecc_status = 0, ecc_failed = 0; | |
1054 | struct nand_chip *this = mtd->priv; | |
58dd8f2b TG |
1055 | uint8_t *data_poi, *oob_data = oob_buf; |
1056 | uint8_t ecc_calc[32]; | |
1057 | uint8_t ecc_code[32]; | |
e0c7d767 DW |
1058 | int eccmode, eccsteps; |
1059 | int *oob_config, datidx; | |
1060 | int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1; | |
1061 | int eccbytes; | |
1062 | int compareecc = 1; | |
1063 | int oobreadlen; | |
1da177e4 | 1064 | |
e0c7d767 | 1065 | DEBUG(MTD_DEBUG_LEVEL3, "nand_read_ecc: from = 0x%08x, len = %i\n", (unsigned int)from, (int)len); |
1da177e4 LT |
1066 | |
1067 | /* Do not allow reads past end of device */ | |
1068 | if ((from + len) > mtd->size) { | |
e0c7d767 | 1069 | DEBUG(MTD_DEBUG_LEVEL0, "nand_read_ecc: Attempt read beyond end of device\n"); |
1da177e4 LT |
1070 | *retlen = 0; |
1071 | return -EINVAL; | |
1072 | } | |
1073 | ||
1074 | /* Grab the lock and see if the device is available */ | |
068e3c0a | 1075 | if (flags & NAND_GET_DEVICE) |
e0c7d767 | 1076 | nand_get_device(this, mtd, FL_READING); |
1da177e4 | 1077 | |
1da177e4 LT |
1078 | /* Autoplace of oob data ? Use the default placement scheme */ |
1079 | if (oobsel->useecc == MTD_NANDECC_AUTOPLACE) | |
1080 | oobsel = this->autooob; | |
61b03bd7 | 1081 | |
6dfc6d25 | 1082 | eccmode = oobsel->useecc ? this->ecc.mode : NAND_ECC_NONE; |
1da177e4 LT |
1083 | oob_config = oobsel->eccpos; |
1084 | ||
1085 | /* Select the NAND device */ | |
1086 | chipnr = (int)(from >> this->chip_shift); | |
1087 | this->select_chip(mtd, chipnr); | |
1088 | ||
1089 | /* First we calculate the starting page */ | |
e0c7d767 | 1090 | realpage = (int)(from >> this->page_shift); |
1da177e4 LT |
1091 | page = realpage & this->pagemask; |
1092 | ||
1093 | /* Get raw starting column */ | |
28318776 | 1094 | col = from & (mtd->writesize - 1); |
1da177e4 | 1095 | |
28318776 | 1096 | end = mtd->writesize; |
6dfc6d25 TG |
1097 | ecc = this->ecc.size; |
1098 | eccbytes = this->ecc.bytes; | |
61b03bd7 | 1099 | |
1da177e4 LT |
1100 | if ((eccmode == NAND_ECC_NONE) || (this->options & NAND_HWECC_SYNDROME)) |
1101 | compareecc = 0; | |
1102 | ||
1103 | oobreadlen = mtd->oobsize; | |
61b03bd7 | 1104 | if (this->options & NAND_HWECC_SYNDROME) |
1da177e4 LT |
1105 | oobreadlen -= oobsel->eccbytes; |
1106 | ||
1107 | /* Loop until all data read */ | |
1108 | while (read < len) { | |
61b03bd7 | 1109 | |
1da177e4 | 1110 | int aligned = (!col && (len - read) >= end); |
61b03bd7 | 1111 | /* |
1da177e4 LT |
1112 | * If the read is not page aligned, we have to read into data buffer |
1113 | * due to ecc, else we read into return buffer direct | |
1114 | */ | |
1115 | if (aligned) | |
1116 | data_poi = &buf[read]; | |
61b03bd7 | 1117 | else |
1da177e4 | 1118 | data_poi = this->data_buf; |
61b03bd7 TG |
1119 | |
1120 | /* Check, if we have this page in the buffer | |
1da177e4 LT |
1121 | * |
1122 | * FIXME: Make it work when we must provide oob data too, | |
1123 | * check the usage of data_buf oob field | |
1124 | */ | |
1125 | if (realpage == this->pagebuf && !oob_buf) { | |
1126 | /* aligned read ? */ | |
1127 | if (aligned) | |
e0c7d767 | 1128 | memcpy(data_poi, this->data_buf, end); |
1da177e4 LT |
1129 | goto readdata; |
1130 | } | |
1131 | ||
1132 | /* Check, if we must send the read command */ | |
1133 | if (sndcmd) { | |
e0c7d767 | 1134 | this->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page); |
1da177e4 | 1135 | sndcmd = 0; |
61b03bd7 | 1136 | } |
1da177e4 LT |
1137 | |
1138 | /* get oob area, if we have no oob buffer from fs-driver */ | |
90e260c8 TG |
1139 | if (!oob_buf || oobsel->useecc == MTD_NANDECC_AUTOPLACE || |
1140 | oobsel->useecc == MTD_NANDECC_AUTOPL_USR) | |
1da177e4 LT |
1141 | oob_data = &this->data_buf[end]; |
1142 | ||
6dfc6d25 | 1143 | eccsteps = this->ecc.steps; |
61b03bd7 | 1144 | |
1da177e4 | 1145 | switch (eccmode) { |
e0c7d767 DW |
1146 | case NAND_ECC_NONE:{ |
1147 | /* No ECC, Read in a page */ | |
1148 | static unsigned long lastwhinge = 0; | |
1149 | if ((lastwhinge / HZ) != (jiffies / HZ)) { | |
1150 | printk(KERN_WARNING | |
1151 | "Reading data from NAND FLASH without ECC is not recommended\n"); | |
1152 | lastwhinge = jiffies; | |
1153 | } | |
1154 | this->read_buf(mtd, data_poi, end); | |
1155 | break; | |
1da177e4 | 1156 | } |
61b03bd7 | 1157 | |
1da177e4 LT |
1158 | case NAND_ECC_SOFT: /* Software ECC 3/256: Read in a page + oob data */ |
1159 | this->read_buf(mtd, data_poi, end); | |
e0c7d767 | 1160 | for (i = 0, datidx = 0; eccsteps; eccsteps--, i += 3, datidx += ecc) |
6dfc6d25 | 1161 | this->ecc.calculate(mtd, &data_poi[datidx], &ecc_calc[i]); |
61b03bd7 | 1162 | break; |
1da177e4 LT |
1163 | |
1164 | default: | |
e0c7d767 | 1165 | for (i = 0, datidx = 0; eccsteps; eccsteps--, i += eccbytes, datidx += ecc) { |
6dfc6d25 | 1166 | this->ecc.hwctl(mtd, NAND_ECC_READ); |
1da177e4 LT |
1167 | this->read_buf(mtd, &data_poi[datidx], ecc); |
1168 | ||
1169 | /* HW ecc with syndrome calculation must read the | |
1170 | * syndrome from flash immidiately after the data */ | |
1171 | if (!compareecc) { | |
1172 | /* Some hw ecc generators need to know when the | |
1173 | * syndrome is read from flash */ | |
6dfc6d25 | 1174 | this->ecc.hwctl(mtd, NAND_ECC_READSYN); |
1da177e4 LT |
1175 | this->read_buf(mtd, &oob_data[i], eccbytes); |
1176 | /* We calc error correction directly, it checks the hw | |
1177 | * generator for an error, reads back the syndrome and | |
1178 | * does the error correction on the fly */ | |
6dfc6d25 | 1179 | ecc_status = this->ecc.correct(mtd, &data_poi[datidx], &oob_data[i], &ecc_code[i]); |
068e3c0a | 1180 | if ((ecc_status == -1) || (ecc_status > (flags && 0xff))) { |
e0c7d767 DW |
1181 | DEBUG(MTD_DEBUG_LEVEL0, "nand_read_ecc: " |
1182 | "Failed ECC read, page 0x%08x on chip %d\n", page, chipnr); | |
1da177e4 LT |
1183 | ecc_failed++; |
1184 | } | |
1185 | } else { | |
6dfc6d25 | 1186 | this->ecc.calculate(mtd, &data_poi[datidx], &ecc_calc[i]); |
61b03bd7 | 1187 | } |
1da177e4 | 1188 | } |
61b03bd7 | 1189 | break; |
1da177e4 LT |
1190 | } |
1191 | ||
1192 | /* read oobdata */ | |
1193 | this->read_buf(mtd, &oob_data[mtd->oobsize - oobreadlen], oobreadlen); | |
1194 | ||
1195 | /* Skip ECC check, if not requested (ECC_NONE or HW_ECC with syndromes) */ | |
1196 | if (!compareecc) | |
61b03bd7 TG |
1197 | goto readoob; |
1198 | ||
1da177e4 LT |
1199 | /* Pick the ECC bytes out of the oob data */ |
1200 | for (j = 0; j < oobsel->eccbytes; j++) | |
1201 | ecc_code[j] = oob_data[oob_config[j]]; | |
1202 | ||
e0c7d767 | 1203 | /* correct data, if necessary */ |
6dfc6d25 TG |
1204 | for (i = 0, j = 0, datidx = 0; i < this->ecc.steps; i++, datidx += ecc) { |
1205 | ecc_status = this->ecc.correct(mtd, &data_poi[datidx], &ecc_code[j], &ecc_calc[j]); | |
61b03bd7 | 1206 | |
1da177e4 LT |
1207 | /* Get next chunk of ecc bytes */ |
1208 | j += eccbytes; | |
61b03bd7 TG |
1209 | |
1210 | /* Check, if we have a fs supplied oob-buffer, | |
1da177e4 LT |
1211 | * This is the legacy mode. Used by YAFFS1 |
1212 | * Should go away some day | |
1213 | */ | |
61b03bd7 | 1214 | if (oob_buf && oobsel->useecc == MTD_NANDECC_PLACE) { |
1da177e4 LT |
1215 | int *p = (int *)(&oob_data[mtd->oobsize]); |
1216 | p[i] = ecc_status; | |
1217 | } | |
61b03bd7 TG |
1218 | |
1219 | if ((ecc_status == -1) || (ecc_status > (flags && 0xff))) { | |
e0c7d767 | 1220 | DEBUG(MTD_DEBUG_LEVEL0, "nand_read_ecc: " "Failed ECC read, page 0x%08x\n", page); |
1da177e4 LT |
1221 | ecc_failed++; |
1222 | } | |
61b03bd7 | 1223 | } |
1da177e4 | 1224 | |
e0c7d767 | 1225 | readoob: |
1da177e4 LT |
1226 | /* check, if we have a fs supplied oob-buffer */ |
1227 | if (oob_buf) { | |
1228 | /* without autoplace. Legacy mode used by YAFFS1 */ | |
e0c7d767 | 1229 | switch (oobsel->useecc) { |
1da177e4 | 1230 | case MTD_NANDECC_AUTOPLACE: |
90e260c8 | 1231 | case MTD_NANDECC_AUTOPL_USR: |
1da177e4 | 1232 | /* Walk through the autoplace chunks */ |
82e1d19f | 1233 | for (i = 0; oobsel->oobfree[i][1]; i++) { |
1da177e4 LT |
1234 | int from = oobsel->oobfree[i][0]; |
1235 | int num = oobsel->oobfree[i][1]; | |
1236 | memcpy(&oob_buf[oob], &oob_data[from], num); | |
82e1d19f | 1237 | oob += num; |
1da177e4 | 1238 | } |
1da177e4 LT |
1239 | break; |
1240 | case MTD_NANDECC_PLACE: | |
1241 | /* YAFFS1 legacy mode */ | |
6dfc6d25 | 1242 | oob_data += this->ecc.steps * sizeof(int); |
1da177e4 LT |
1243 | default: |
1244 | oob_data += mtd->oobsize; | |
1245 | } | |
1246 | } | |
1247 | readdata: | |
1248 | /* Partial page read, transfer data into fs buffer */ | |
61b03bd7 | 1249 | if (!aligned) { |
1da177e4 LT |
1250 | for (j = col; j < end && read < len; j++) |
1251 | buf[read++] = data_poi[j]; | |
61b03bd7 TG |
1252 | this->pagebuf = realpage; |
1253 | } else | |
28318776 | 1254 | read += mtd->writesize; |
1da177e4 | 1255 | |
61b03bd7 | 1256 | /* Apply delay or wait for ready/busy pin |
1da177e4 LT |
1257 | * Do this before the AUTOINCR check, so no problems |
1258 | * arise if a chip which does auto increment | |
1259 | * is marked as NOAUTOINCR by the board driver. | |
e0c7d767 | 1260 | */ |
61b03bd7 | 1261 | if (!this->dev_ready) |
e0c7d767 | 1262 | udelay(this->chip_delay); |
1da177e4 | 1263 | else |
3b88775c | 1264 | nand_wait_ready(mtd); |
61b03bd7 | 1265 | |
1da177e4 | 1266 | if (read == len) |
61b03bd7 | 1267 | break; |
1da177e4 LT |
1268 | |
1269 | /* For subsequent reads align to page boundary. */ | |
1270 | col = 0; | |
1271 | /* Increment page address */ | |
1272 | realpage++; | |
1273 | ||
1274 | page = realpage & this->pagemask; | |
1275 | /* Check, if we cross a chip boundary */ | |
1276 | if (!page) { | |
1277 | chipnr++; | |
1278 | this->select_chip(mtd, -1); | |
1279 | this->select_chip(mtd, chipnr); | |
1280 | } | |
61b03bd7 TG |
1281 | /* Check, if the chip supports auto page increment |
1282 | * or if we have hit a block boundary. | |
e0c7d767 | 1283 | */ |
1da177e4 | 1284 | if (!NAND_CANAUTOINCR(this) || !(page & blockcheck)) |
61b03bd7 | 1285 | sndcmd = 1; |
1da177e4 LT |
1286 | } |
1287 | ||
1288 | /* Deselect and wake up anyone waiting on the device */ | |
068e3c0a DM |
1289 | if (flags & NAND_GET_DEVICE) |
1290 | nand_release_device(mtd); | |
1da177e4 LT |
1291 | |
1292 | /* | |
1293 | * Return success, if no ECC failures, else -EBADMSG | |
1294 | * fs driver will take care of that, because | |
1295 | * retlen == desired len and result == -EBADMSG | |
1296 | */ | |
1297 | *retlen = read; | |
1298 | return ecc_failed ? -EBADMSG : 0; | |
1299 | } | |
1300 | ||
1301 | /** | |
1302 | * nand_read_oob - [MTD Interface] NAND read out-of-band | |
1303 | * @mtd: MTD device structure | |
1304 | * @from: offset to read from | |
1305 | * @len: number of bytes to read | |
1306 | * @retlen: pointer to variable to store the number of read bytes | |
1307 | * @buf: the databuffer to put data | |
1308 | * | |
1309 | * NAND read out-of-band data from the spare area | |
1310 | */ | |
58dd8f2b | 1311 | static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, uint8_t *buf) |
1da177e4 LT |
1312 | { |
1313 | int i, col, page, chipnr; | |
1314 | struct nand_chip *this = mtd->priv; | |
e0c7d767 | 1315 | int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1; |
1da177e4 | 1316 | |
e0c7d767 | 1317 | DEBUG(MTD_DEBUG_LEVEL3, "nand_read_oob: from = 0x%08x, len = %i\n", (unsigned int)from, (int)len); |
1da177e4 LT |
1318 | |
1319 | /* Shift to get page */ | |
1320 | page = (int)(from >> this->page_shift); | |
1321 | chipnr = (int)(from >> this->chip_shift); | |
61b03bd7 | 1322 | |
1da177e4 LT |
1323 | /* Mask to get column */ |
1324 | col = from & (mtd->oobsize - 1); | |
1325 | ||
1326 | /* Initialize return length value */ | |
1327 | *retlen = 0; | |
1328 | ||
1329 | /* Do not allow reads past end of device */ | |
1330 | if ((from + len) > mtd->size) { | |
e0c7d767 | 1331 | DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: Attempt read beyond end of device\n"); |
1da177e4 LT |
1332 | *retlen = 0; |
1333 | return -EINVAL; | |
1334 | } | |
1335 | ||
1336 | /* Grab the lock and see if the device is available */ | |
e0c7d767 | 1337 | nand_get_device(this, mtd, FL_READING); |
1da177e4 LT |
1338 | |
1339 | /* Select the NAND device */ | |
1340 | this->select_chip(mtd, chipnr); | |
1341 | ||
1342 | /* Send the read command */ | |
e0c7d767 | 1343 | this->cmdfunc(mtd, NAND_CMD_READOOB, col, page & this->pagemask); |
61b03bd7 | 1344 | /* |
1da177e4 LT |
1345 | * Read the data, if we read more than one page |
1346 | * oob data, let the device transfer the data ! | |
1347 | */ | |
1348 | i = 0; | |
1349 | while (i < len) { | |
1350 | int thislen = mtd->oobsize - col; | |
1351 | thislen = min_t(int, thislen, len); | |
1352 | this->read_buf(mtd, &buf[i], thislen); | |
1353 | i += thislen; | |
1da177e4 LT |
1354 | |
1355 | /* Read more ? */ | |
1356 | if (i < len) { | |
1357 | page++; | |
1358 | col = 0; | |
1359 | ||
1360 | /* Check, if we cross a chip boundary */ | |
1361 | if (!(page & this->pagemask)) { | |
1362 | chipnr++; | |
1363 | this->select_chip(mtd, -1); | |
1364 | this->select_chip(mtd, chipnr); | |
1365 | } | |
61b03bd7 TG |
1366 | |
1367 | /* Apply delay or wait for ready/busy pin | |
19870da7 TG |
1368 | * Do this before the AUTOINCR check, so no problems |
1369 | * arise if a chip which does auto increment | |
1370 | * is marked as NOAUTOINCR by the board driver. | |
1371 | */ | |
61b03bd7 | 1372 | if (!this->dev_ready) |
e0c7d767 | 1373 | udelay(this->chip_delay); |
19870da7 TG |
1374 | else |
1375 | nand_wait_ready(mtd); | |
1376 | ||
61b03bd7 TG |
1377 | /* Check, if the chip supports auto page increment |
1378 | * or if we have hit a block boundary. | |
e0c7d767 | 1379 | */ |
1da177e4 LT |
1380 | if (!NAND_CANAUTOINCR(this) || !(page & blockcheck)) { |
1381 | /* For subsequent page reads set offset to 0 */ | |
e0c7d767 | 1382 | this->cmdfunc(mtd, NAND_CMD_READOOB, 0x0, page & this->pagemask); |
1da177e4 LT |
1383 | } |
1384 | } | |
1385 | } | |
1386 | ||
1387 | /* Deselect and wake up anyone waiting on the device */ | |
1388 | nand_release_device(mtd); | |
1389 | ||
1390 | /* Return happy */ | |
1391 | *retlen = len; | |
1392 | return 0; | |
1393 | } | |
1394 | ||
1395 | /** | |
1396 | * nand_read_raw - [GENERIC] Read raw data including oob into buffer | |
1397 | * @mtd: MTD device structure | |
1398 | * @buf: temporary buffer | |
1399 | * @from: offset to read from | |
1400 | * @len: number of bytes to read | |
1401 | * @ooblen: number of oob data bytes to read | |
1402 | * | |
1403 | * Read raw data including oob into buffer | |
1404 | */ | |
e0c7d767 | 1405 | int nand_read_raw(struct mtd_info *mtd, uint8_t *buf, loff_t from, size_t len, size_t ooblen) |
1da177e4 LT |
1406 | { |
1407 | struct nand_chip *this = mtd->priv; | |
e0c7d767 DW |
1408 | int page = (int)(from >> this->page_shift); |
1409 | int chip = (int)(from >> this->chip_shift); | |
1da177e4 LT |
1410 | int sndcmd = 1; |
1411 | int cnt = 0; | |
28318776 | 1412 | int pagesize = mtd->writesize + mtd->oobsize; |
e0c7d767 | 1413 | int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1; |
1da177e4 LT |
1414 | |
1415 | /* Do not allow reads past end of device */ | |
1416 | if ((from + len) > mtd->size) { | |
e0c7d767 | 1417 | DEBUG(MTD_DEBUG_LEVEL0, "nand_read_raw: Attempt read beyond end of device\n"); |
1da177e4 LT |
1418 | return -EINVAL; |
1419 | } | |
1420 | ||
1421 | /* Grab the lock and see if the device is available */ | |
e0c7d767 | 1422 | nand_get_device(this, mtd, FL_READING); |
1da177e4 | 1423 | |
e0c7d767 | 1424 | this->select_chip(mtd, chip); |
61b03bd7 | 1425 | |
1da177e4 LT |
1426 | /* Add requested oob length */ |
1427 | len += ooblen; | |
61b03bd7 | 1428 | |
1da177e4 LT |
1429 | while (len) { |
1430 | if (sndcmd) | |
e0c7d767 | 1431 | this->cmdfunc(mtd, NAND_CMD_READ0, 0, page & this->pagemask); |
61b03bd7 | 1432 | sndcmd = 0; |
1da177e4 | 1433 | |
e0c7d767 | 1434 | this->read_buf(mtd, &buf[cnt], pagesize); |
1da177e4 LT |
1435 | |
1436 | len -= pagesize; | |
1437 | cnt += pagesize; | |
1438 | page++; | |
61b03bd7 TG |
1439 | |
1440 | if (!this->dev_ready) | |
e0c7d767 | 1441 | udelay(this->chip_delay); |
1da177e4 | 1442 | else |
3b88775c | 1443 | nand_wait_ready(mtd); |
61b03bd7 TG |
1444 | |
1445 | /* Check, if the chip supports auto page increment */ | |
1da177e4 LT |
1446 | if (!NAND_CANAUTOINCR(this) || !(page & blockcheck)) |
1447 | sndcmd = 1; | |
1448 | } | |
1449 | ||
1450 | /* Deselect and wake up anyone waiting on the device */ | |
1451 | nand_release_device(mtd); | |
1452 | return 0; | |
1453 | } | |
1454 | ||
9223a456 TG |
1455 | /** |
1456 | * nand_write_raw - [GENERIC] Write raw data including oob | |
1457 | * @mtd: MTD device structure | |
1458 | * @buf: source buffer | |
1459 | * @to: offset to write to | |
1460 | * @len: number of bytes to write | |
1461 | * @buf: source buffer | |
1462 | * @oob: oob buffer | |
1463 | * | |
1464 | * Write raw data including oob | |
1465 | */ | |
1466 | int nand_write_raw(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, | |
1467 | uint8_t *buf, uint8_t *oob) | |
1468 | { | |
1469 | struct nand_chip *this = mtd->priv; | |
1470 | int page = (int)(to >> this->page_shift); | |
1471 | int chip = (int)(to >> this->chip_shift); | |
1472 | int ret; | |
1473 | ||
1474 | *retlen = 0; | |
1475 | ||
1476 | /* Do not allow writes past end of device */ | |
1477 | if ((to + len) > mtd->size) { | |
1478 | DEBUG(MTD_DEBUG_LEVEL0, "nand_read_raw: Attempt write " | |
1479 | "beyond end of device\n"); | |
1480 | return -EINVAL; | |
1481 | } | |
1482 | ||
1483 | /* Grab the lock and see if the device is available */ | |
1484 | nand_get_device(this, mtd, FL_WRITING); | |
1485 | ||
1486 | this->select_chip(mtd, chip); | |
1487 | this->data_poi = buf; | |
1488 | ||
1489 | while (len != *retlen) { | |
1490 | ret = nand_write_page(mtd, this, page, oob, &mtd->oobinfo, 0); | |
1491 | if (ret) | |
1492 | return ret; | |
1493 | page++; | |
1494 | *retlen += mtd->writesize; | |
1495 | this->data_poi += mtd->writesize; | |
1496 | oob += mtd->oobsize; | |
1497 | } | |
1498 | ||
1499 | /* Deselect and wake up anyone waiting on the device */ | |
1500 | nand_release_device(mtd); | |
1501 | return 0; | |
1502 | } | |
3821720d | 1503 | EXPORT_SYMBOL_GPL(nand_write_raw); |
9223a456 | 1504 | |
61b03bd7 TG |
1505 | /** |
1506 | * nand_prepare_oobbuf - [GENERIC] Prepare the out of band buffer | |
1da177e4 LT |
1507 | * @mtd: MTD device structure |
1508 | * @fsbuf: buffer given by fs driver | |
1509 | * @oobsel: out of band selection structre | |
1510 | * @autoplace: 1 = place given buffer into the oob bytes | |
1511 | * @numpages: number of pages to prepare | |
1512 | * | |
1513 | * Return: | |
1514 | * 1. Filesystem buffer available and autoplacement is off, | |
1515 | * return filesystem buffer | |
1516 | * 2. No filesystem buffer or autoplace is off, return internal | |
1517 | * buffer | |
1518 | * 3. Filesystem buffer is given and autoplace selected | |
1519 | * put data from fs buffer into internal buffer and | |
1520 | * retrun internal buffer | |
1521 | * | |
1522 | * Note: The internal buffer is filled with 0xff. This must | |
1523 | * be done only once, when no autoplacement happens | |
1524 | * Autoplacement sets the buffer dirty flag, which | |
1525 | * forces the 0xff fill before using the buffer again. | |
1526 | * | |
1527 | */ | |
58dd8f2b | 1528 | static uint8_t *nand_prepare_oobbuf(struct mtd_info *mtd, uint8_t *fsbuf, struct nand_oobinfo *oobsel, |
e0c7d767 | 1529 | int autoplace, int numpages) |
1da177e4 LT |
1530 | { |
1531 | struct nand_chip *this = mtd->priv; | |
1532 | int i, len, ofs; | |
1533 | ||
1534 | /* Zero copy fs supplied buffer */ | |
61b03bd7 | 1535 | if (fsbuf && !autoplace) |
1da177e4 LT |
1536 | return fsbuf; |
1537 | ||
1538 | /* Check, if the buffer must be filled with ff again */ | |
61b03bd7 | 1539 | if (this->oobdirty) { |
e0c7d767 | 1540 | memset(this->oob_buf, 0xff, mtd->oobsize << (this->phys_erase_shift - this->page_shift)); |
1da177e4 | 1541 | this->oobdirty = 0; |
61b03bd7 TG |
1542 | } |
1543 | ||
1da177e4 LT |
1544 | /* If we have no autoplacement or no fs buffer use the internal one */ |
1545 | if (!autoplace || !fsbuf) | |
1546 | return this->oob_buf; | |
61b03bd7 | 1547 | |
1da177e4 LT |
1548 | /* Walk through the pages and place the data */ |
1549 | this->oobdirty = 1; | |
1550 | ofs = 0; | |
1551 | while (numpages--) { | |
1552 | for (i = 0, len = 0; len < mtd->oobavail; i++) { | |
1553 | int to = ofs + oobsel->oobfree[i][0]; | |
1554 | int num = oobsel->oobfree[i][1]; | |
e0c7d767 | 1555 | memcpy(&this->oob_buf[to], fsbuf, num); |
1da177e4 LT |
1556 | len += num; |
1557 | fsbuf += num; | |
1558 | } | |
1559 | ofs += mtd->oobavail; | |
1560 | } | |
1561 | return this->oob_buf; | |
1562 | } | |
1563 | ||
28318776 | 1564 | #define NOTALIGNED(x) (x & (mtd->writesize-1)) != 0 |
1da177e4 LT |
1565 | |
1566 | /** | |
9223a456 | 1567 | * nand_write - [MTD Interface] NAND write with ECC |
1da177e4 LT |
1568 | * @mtd: MTD device structure |
1569 | * @to: offset to write to | |
1570 | * @len: number of bytes to write | |
1571 | * @retlen: pointer to variable to store the number of written bytes | |
1572 | * @buf: the data to write | |
1da177e4 LT |
1573 | * |
1574 | * NAND write with ECC | |
1575 | */ | |
9223a456 TG |
1576 | static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, |
1577 | size_t *retlen, const uint8_t *buf) | |
1da177e4 LT |
1578 | { |
1579 | int startpage, page, ret = -EIO, oob = 0, written = 0, chipnr; | |
1580 | int autoplace = 0, numpages, totalpages; | |
1581 | struct nand_chip *this = mtd->priv; | |
9223a456 | 1582 | uint8_t *oobbuf, *bufstart, *eccbuf = NULL; |
e0c7d767 | 1583 | int ppblock = (1 << (this->phys_erase_shift - this->page_shift)); |
9223a456 | 1584 | struct nand_oobinfo *oobsel = &mtd->oobinfo; |
1da177e4 | 1585 | |
9223a456 | 1586 | DEBUG(MTD_DEBUG_LEVEL3, "nand_write: to = 0x%08x, len = %i\n", (unsigned int)to, (int)len); |
1da177e4 LT |
1587 | |
1588 | /* Initialize retlen, in case of early exit */ | |
1589 | *retlen = 0; | |
1590 | ||
1591 | /* Do not allow write past end of device */ | |
1592 | if ((to + len) > mtd->size) { | |
9223a456 | 1593 | DEBUG(MTD_DEBUG_LEVEL0, "nand_write: Attempt to write past end of page\n"); |
1da177e4 LT |
1594 | return -EINVAL; |
1595 | } | |
1596 | ||
61b03bd7 | 1597 | /* reject writes, which are not page aligned */ |
e0c7d767 | 1598 | if (NOTALIGNED(to) || NOTALIGNED(len)) { |
9223a456 | 1599 | printk(KERN_NOTICE "nand_write: Attempt to write not page aligned data\n"); |
1da177e4 LT |
1600 | return -EINVAL; |
1601 | } | |
1602 | ||
1603 | /* Grab the lock and see if the device is available */ | |
e0c7d767 | 1604 | nand_get_device(this, mtd, FL_WRITING); |
1da177e4 LT |
1605 | |
1606 | /* Calculate chipnr */ | |
1607 | chipnr = (int)(to >> this->chip_shift); | |
1608 | /* Select the NAND device */ | |
1609 | this->select_chip(mtd, chipnr); | |
1610 | ||
1611 | /* Check, if it is write protected */ | |
1612 | if (nand_check_wp(mtd)) | |
1613 | goto out; | |
1614 | ||
1da177e4 LT |
1615 | /* Autoplace of oob data ? Use the default placement scheme */ |
1616 | if (oobsel->useecc == MTD_NANDECC_AUTOPLACE) { | |
1617 | oobsel = this->autooob; | |
1618 | autoplace = 1; | |
61b03bd7 | 1619 | } |
90e260c8 TG |
1620 | if (oobsel->useecc == MTD_NANDECC_AUTOPL_USR) |
1621 | autoplace = 1; | |
1da177e4 LT |
1622 | |
1623 | /* Setup variables and oob buffer */ | |
1624 | totalpages = len >> this->page_shift; | |
e0c7d767 | 1625 | page = (int)(to >> this->page_shift); |
1da177e4 | 1626 | /* Invalidate the page cache, if we write to the cached page */ |
61b03bd7 | 1627 | if (page <= this->pagebuf && this->pagebuf < (page + totalpages)) |
1da177e4 | 1628 | this->pagebuf = -1; |
61b03bd7 | 1629 | |
1da177e4 LT |
1630 | /* Set it relative to chip */ |
1631 | page &= this->pagemask; | |
1632 | startpage = page; | |
1633 | /* Calc number of pages we can write in one go */ | |
e0c7d767 DW |
1634 | numpages = min(ppblock - (startpage & (ppblock - 1)), totalpages); |
1635 | oobbuf = nand_prepare_oobbuf(mtd, eccbuf, oobsel, autoplace, numpages); | |
58dd8f2b | 1636 | bufstart = (uint8_t *) buf; |
1da177e4 LT |
1637 | |
1638 | /* Loop until all data is written */ | |
1639 | while (written < len) { | |
1640 | ||
58dd8f2b | 1641 | this->data_poi = (uint8_t *) &buf[written]; |
1da177e4 LT |
1642 | /* Write one page. If this is the last page to write |
1643 | * or the last page in this block, then use the | |
1644 | * real pageprogram command, else select cached programming | |
1645 | * if supported by the chip. | |
1646 | */ | |
e0c7d767 | 1647 | ret = nand_write_page(mtd, this, page, &oobbuf[oob], oobsel, (--numpages > 0)); |
1da177e4 | 1648 | if (ret) { |
9223a456 | 1649 | DEBUG(MTD_DEBUG_LEVEL0, "nand_write: write_page failed %d\n", ret); |
1da177e4 | 1650 | goto out; |
61b03bd7 | 1651 | } |
1da177e4 LT |
1652 | /* Next oob page */ |
1653 | oob += mtd->oobsize; | |
1654 | /* Update written bytes count */ | |
28318776 | 1655 | written += mtd->writesize; |
61b03bd7 | 1656 | if (written == len) |
1da177e4 | 1657 | goto cmp; |
61b03bd7 | 1658 | |
1da177e4 LT |
1659 | /* Increment page address */ |
1660 | page++; | |
1661 | ||
1662 | /* Have we hit a block boundary ? Then we have to verify and | |
1663 | * if verify is ok, we have to setup the oob buffer for | |
1664 | * the next pages. | |
e0c7d767 DW |
1665 | */ |
1666 | if (!(page & (ppblock - 1))) { | |
1da177e4 LT |
1667 | int ofs; |
1668 | this->data_poi = bufstart; | |
e0c7d767 DW |
1669 | ret = nand_verify_pages(mtd, this, startpage, page - startpage, |
1670 | oobbuf, oobsel, chipnr, (eccbuf != NULL)); | |
1da177e4 | 1671 | if (ret) { |
9223a456 | 1672 | DEBUG(MTD_DEBUG_LEVEL0, "nand_write: verify_pages failed %d\n", ret); |
1da177e4 | 1673 | goto out; |
61b03bd7 | 1674 | } |
1da177e4 LT |
1675 | *retlen = written; |
1676 | ||
1677 | ofs = autoplace ? mtd->oobavail : mtd->oobsize; | |
1678 | if (eccbuf) | |
1679 | eccbuf += (page - startpage) * ofs; | |
1680 | totalpages -= page - startpage; | |
e0c7d767 | 1681 | numpages = min(totalpages, ppblock); |
1da177e4 LT |
1682 | page &= this->pagemask; |
1683 | startpage = page; | |
e0c7d767 | 1684 | oobbuf = nand_prepare_oobbuf(mtd, eccbuf, oobsel, autoplace, numpages); |
868801e5 | 1685 | oob = 0; |
1da177e4 LT |
1686 | /* Check, if we cross a chip boundary */ |
1687 | if (!page) { | |
1688 | chipnr++; | |
1689 | this->select_chip(mtd, -1); | |
1690 | this->select_chip(mtd, chipnr); | |
1691 | } | |
1692 | } | |
1693 | } | |
1694 | /* Verify the remaining pages */ | |
e0c7d767 | 1695 | cmp: |
1da177e4 | 1696 | this->data_poi = bufstart; |
e0c7d767 | 1697 | ret = nand_verify_pages(mtd, this, startpage, totalpages, oobbuf, oobsel, chipnr, (eccbuf != NULL)); |
1da177e4 LT |
1698 | if (!ret) |
1699 | *retlen = written; | |
61b03bd7 | 1700 | else |
9223a456 | 1701 | DEBUG(MTD_DEBUG_LEVEL0, "nand_write: verify_pages failed %d\n", ret); |
1da177e4 | 1702 | |
e0c7d767 | 1703 | out: |
1da177e4 LT |
1704 | /* Deselect and wake up anyone waiting on the device */ |
1705 | nand_release_device(mtd); | |
1706 | ||
1707 | return ret; | |
1708 | } | |
1709 | ||
1da177e4 LT |
1710 | /** |
1711 | * nand_write_oob - [MTD Interface] NAND write out-of-band | |
1712 | * @mtd: MTD device structure | |
1713 | * @to: offset to write to | |
1714 | * @len: number of bytes to write | |
1715 | * @retlen: pointer to variable to store the number of written bytes | |
1716 | * @buf: the data to write | |
1717 | * | |
1718 | * NAND write out-of-band | |
1719 | */ | |
58dd8f2b | 1720 | static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const uint8_t *buf) |
1da177e4 LT |
1721 | { |
1722 | int column, page, status, ret = -EIO, chipnr; | |
1723 | struct nand_chip *this = mtd->priv; | |
1724 | ||
e0c7d767 | 1725 | DEBUG(MTD_DEBUG_LEVEL3, "nand_write_oob: to = 0x%08x, len = %i\n", (unsigned int)to, (int)len); |
1da177e4 LT |
1726 | |
1727 | /* Shift to get page */ | |
e0c7d767 DW |
1728 | page = (int)(to >> this->page_shift); |
1729 | chipnr = (int)(to >> this->chip_shift); | |
1da177e4 LT |
1730 | |
1731 | /* Mask to get column */ | |
1732 | column = to & (mtd->oobsize - 1); | |
1733 | ||
1734 | /* Initialize return length value */ | |
1735 | *retlen = 0; | |
1736 | ||
1737 | /* Do not allow write past end of page */ | |
1738 | if ((column + len) > mtd->oobsize) { | |
e0c7d767 | 1739 | DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: Attempt to write past end of page\n"); |
1da177e4 LT |
1740 | return -EINVAL; |
1741 | } | |
1742 | ||
1743 | /* Grab the lock and see if the device is available */ | |
e0c7d767 | 1744 | nand_get_device(this, mtd, FL_WRITING); |
1da177e4 LT |
1745 | |
1746 | /* Select the NAND device */ | |
1747 | this->select_chip(mtd, chipnr); | |
1748 | ||
1749 | /* Reset the chip. Some chips (like the Toshiba TC5832DC found | |
1750 | in one of my DiskOnChip 2000 test units) will clear the whole | |
1751 | data page too if we don't do this. I have no clue why, but | |
1752 | I seem to have 'fixed' it in the doc2000 driver in | |
1753 | August 1999. dwmw2. */ | |
1754 | this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); | |
1755 | ||
1756 | /* Check, if it is write protected */ | |
1757 | if (nand_check_wp(mtd)) | |
1758 | goto out; | |
61b03bd7 | 1759 | |
1da177e4 LT |
1760 | /* Invalidate the page cache, if we write to the cached page */ |
1761 | if (page == this->pagebuf) | |
1762 | this->pagebuf = -1; | |
1763 | ||
1764 | if (NAND_MUST_PAD(this)) { | |
1765 | /* Write out desired data */ | |
28318776 | 1766 | this->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page & this->pagemask); |
1da177e4 LT |
1767 | /* prepad 0xff for partial programming */ |
1768 | this->write_buf(mtd, ffchars, column); | |
1769 | /* write data */ | |
1770 | this->write_buf(mtd, buf, len); | |
1771 | /* postpad 0xff for partial programming */ | |
e0c7d767 | 1772 | this->write_buf(mtd, ffchars, mtd->oobsize - (len + column)); |
1da177e4 LT |
1773 | } else { |
1774 | /* Write out desired data */ | |
28318776 | 1775 | this->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize + column, page & this->pagemask); |
1da177e4 LT |
1776 | /* write data */ |
1777 | this->write_buf(mtd, buf, len); | |
1778 | } | |
1779 | /* Send command to program the OOB data */ | |
e0c7d767 | 1780 | this->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); |
1da177e4 | 1781 | |
e0c7d767 | 1782 | status = this->waitfunc(mtd, this, FL_WRITING); |
1da177e4 LT |
1783 | |
1784 | /* See if device thinks it succeeded */ | |
a4ab4c5d | 1785 | if (status & NAND_STATUS_FAIL) { |
e0c7d767 | 1786 | DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: " "Failed write, page 0x%08x\n", page); |
1da177e4 LT |
1787 | ret = -EIO; |
1788 | goto out; | |
1789 | } | |
1790 | /* Return happy */ | |
1791 | *retlen = len; | |
1792 | ||
1793 | #ifdef CONFIG_MTD_NAND_VERIFY_WRITE | |
1794 | /* Send command to read back the data */ | |
e0c7d767 | 1795 | this->cmdfunc(mtd, NAND_CMD_READOOB, column, page & this->pagemask); |
1da177e4 LT |
1796 | |
1797 | if (this->verify_buf(mtd, buf, len)) { | |
e0c7d767 | 1798 | DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: " "Failed write verify, page 0x%08x\n", page); |
1da177e4 LT |
1799 | ret = -EIO; |
1800 | goto out; | |
1801 | } | |
1802 | #endif | |
1803 | ret = 0; | |
e0c7d767 | 1804 | out: |
1da177e4 LT |
1805 | /* Deselect and wake up anyone waiting on the device */ |
1806 | nand_release_device(mtd); | |
1807 | ||
1808 | return ret; | |
1809 | } | |
1810 | ||
1da177e4 LT |
1811 | /** |
1812 | * single_erease_cmd - [GENERIC] NAND standard block erase command function | |
1813 | * @mtd: MTD device structure | |
1814 | * @page: the page address of the block which will be erased | |
1815 | * | |
1816 | * Standard erase command for NAND chips | |
1817 | */ | |
e0c7d767 | 1818 | static void single_erase_cmd(struct mtd_info *mtd, int page) |
1da177e4 LT |
1819 | { |
1820 | struct nand_chip *this = mtd->priv; | |
1821 | /* Send commands to erase a block */ | |
e0c7d767 DW |
1822 | this->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page); |
1823 | this->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1); | |
1da177e4 LT |
1824 | } |
1825 | ||
1826 | /** | |
1827 | * multi_erease_cmd - [GENERIC] AND specific block erase command function | |
1828 | * @mtd: MTD device structure | |
1829 | * @page: the page address of the block which will be erased | |
1830 | * | |
1831 | * AND multi block erase command function | |
1832 | * Erase 4 consecutive blocks | |
1833 | */ | |
e0c7d767 | 1834 | static void multi_erase_cmd(struct mtd_info *mtd, int page) |
1da177e4 LT |
1835 | { |
1836 | struct nand_chip *this = mtd->priv; | |
1837 | /* Send commands to erase a block */ | |
e0c7d767 DW |
1838 | this->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++); |
1839 | this->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++); | |
1840 | this->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++); | |
1841 | this->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page); | |
1842 | this->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1); | |
1da177e4 LT |
1843 | } |
1844 | ||
1845 | /** | |
1846 | * nand_erase - [MTD Interface] erase block(s) | |
1847 | * @mtd: MTD device structure | |
1848 | * @instr: erase instruction | |
1849 | * | |
1850 | * Erase one ore more blocks | |
1851 | */ | |
e0c7d767 | 1852 | static int nand_erase(struct mtd_info *mtd, struct erase_info *instr) |
1da177e4 | 1853 | { |
e0c7d767 | 1854 | return nand_erase_nand(mtd, instr, 0); |
1da177e4 | 1855 | } |
61b03bd7 | 1856 | |
30f464b7 | 1857 | #define BBT_PAGE_MASK 0xffffff3f |
1da177e4 LT |
1858 | /** |
1859 | * nand_erase_intern - [NAND Interface] erase block(s) | |
1860 | * @mtd: MTD device structure | |
1861 | * @instr: erase instruction | |
1862 | * @allowbbt: allow erasing the bbt area | |
1863 | * | |
1864 | * Erase one ore more blocks | |
1865 | */ | |
e0c7d767 | 1866 | int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr, int allowbbt) |
1da177e4 LT |
1867 | { |
1868 | int page, len, status, pages_per_block, ret, chipnr; | |
1869 | struct nand_chip *this = mtd->priv; | |
30f464b7 DM |
1870 | int rewrite_bbt[NAND_MAX_CHIPS]={0}; /* flags to indicate the page, if bbt needs to be rewritten. */ |
1871 | unsigned int bbt_masked_page; /* bbt mask to compare to page being erased. */ | |
1872 | /* It is used to see if the current page is in the same */ | |
1873 | /* 256 block group and the same bank as the bbt. */ | |
1da177e4 | 1874 | |
e0c7d767 | 1875 | DEBUG(MTD_DEBUG_LEVEL3, "nand_erase: start = 0x%08x, len = %i\n", (unsigned int)instr->addr, (unsigned int)instr->len); |
1da177e4 LT |
1876 | |
1877 | /* Start address must align on block boundary */ | |
1878 | if (instr->addr & ((1 << this->phys_erase_shift) - 1)) { | |
e0c7d767 | 1879 | DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Unaligned address\n"); |
1da177e4 LT |
1880 | return -EINVAL; |
1881 | } | |
1882 | ||
1883 | /* Length must align on block boundary */ | |
1884 | if (instr->len & ((1 << this->phys_erase_shift) - 1)) { | |
e0c7d767 | 1885 | DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Length not block aligned\n"); |
1da177e4 LT |
1886 | return -EINVAL; |
1887 | } | |
1888 | ||
1889 | /* Do not allow erase past end of device */ | |
1890 | if ((instr->len + instr->addr) > mtd->size) { | |
e0c7d767 | 1891 | DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Erase past end of device\n"); |
1da177e4 LT |
1892 | return -EINVAL; |
1893 | } | |
1894 | ||
1895 | instr->fail_addr = 0xffffffff; | |
1896 | ||
1897 | /* Grab the lock and see if the device is available */ | |
e0c7d767 | 1898 | nand_get_device(this, mtd, FL_ERASING); |
1da177e4 LT |
1899 | |
1900 | /* Shift to get first page */ | |
e0c7d767 DW |
1901 | page = (int)(instr->addr >> this->page_shift); |
1902 | chipnr = (int)(instr->addr >> this->chip_shift); | |
1da177e4 LT |
1903 | |
1904 | /* Calculate pages in each block */ | |
1905 | pages_per_block = 1 << (this->phys_erase_shift - this->page_shift); | |
1906 | ||
1907 | /* Select the NAND device */ | |
1908 | this->select_chip(mtd, chipnr); | |
1909 | ||
1910 | /* Check the WP bit */ | |
1911 | /* Check, if it is write protected */ | |
1912 | if (nand_check_wp(mtd)) { | |
e0c7d767 | 1913 | DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Device is write protected!!!\n"); |
1da177e4 LT |
1914 | instr->state = MTD_ERASE_FAILED; |
1915 | goto erase_exit; | |
1916 | } | |
1917 | ||
30f464b7 DM |
1918 | /* if BBT requires refresh, set the BBT page mask to see if the BBT should be rewritten */ |
1919 | if (this->options & BBT_AUTO_REFRESH) { | |
1920 | bbt_masked_page = this->bbt_td->pages[chipnr] & BBT_PAGE_MASK; | |
1921 | } else { | |
1922 | bbt_masked_page = 0xffffffff; /* should not match anything */ | |
1923 | } | |
1924 | ||
1da177e4 LT |
1925 | /* Loop through the pages */ |
1926 | len = instr->len; | |
1927 | ||
1928 | instr->state = MTD_ERASING; | |
1929 | ||
1930 | while (len) { | |
1931 | /* Check if we have a bad block, we do not erase bad blocks ! */ | |
1932 | if (nand_block_checkbad(mtd, ((loff_t) page) << this->page_shift, 0, allowbbt)) { | |
e0c7d767 | 1933 | printk(KERN_WARNING "nand_erase: attempt to erase a bad block at page 0x%08x\n", page); |
1da177e4 LT |
1934 | instr->state = MTD_ERASE_FAILED; |
1935 | goto erase_exit; | |
1936 | } | |
61b03bd7 TG |
1937 | |
1938 | /* Invalidate the page cache, if we erase the block which contains | |
1da177e4 LT |
1939 | the current cached page */ |
1940 | if (page <= this->pagebuf && this->pagebuf < (page + pages_per_block)) | |
1941 | this->pagebuf = -1; | |
1942 | ||
e0c7d767 | 1943 | this->erase_cmd(mtd, page & this->pagemask); |
61b03bd7 | 1944 | |
e0c7d767 | 1945 | status = this->waitfunc(mtd, this, FL_ERASING); |
1da177e4 | 1946 | |
068e3c0a DM |
1947 | /* See if operation failed and additional status checks are available */ |
1948 | if ((status & NAND_STATUS_FAIL) && (this->errstat)) { | |
1949 | status = this->errstat(mtd, this, FL_ERASING, status, page); | |
1950 | } | |
1951 | ||
1da177e4 | 1952 | /* See if block erase succeeded */ |
a4ab4c5d | 1953 | if (status & NAND_STATUS_FAIL) { |
e0c7d767 | 1954 | DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: " "Failed erase, page 0x%08x\n", page); |
1da177e4 LT |
1955 | instr->state = MTD_ERASE_FAILED; |
1956 | instr->fail_addr = (page << this->page_shift); | |
1957 | goto erase_exit; | |
1958 | } | |
30f464b7 DM |
1959 | |
1960 | /* if BBT requires refresh, set the BBT rewrite flag to the page being erased */ | |
1961 | if (this->options & BBT_AUTO_REFRESH) { | |
61b03bd7 | 1962 | if (((page & BBT_PAGE_MASK) == bbt_masked_page) && |
30f464b7 DM |
1963 | (page != this->bbt_td->pages[chipnr])) { |
1964 | rewrite_bbt[chipnr] = (page << this->page_shift); | |
1965 | } | |
1966 | } | |
61b03bd7 | 1967 | |
1da177e4 LT |
1968 | /* Increment page address and decrement length */ |
1969 | len -= (1 << this->phys_erase_shift); | |
1970 | page += pages_per_block; | |
1971 | ||
1972 | /* Check, if we cross a chip boundary */ | |
1973 | if (len && !(page & this->pagemask)) { | |
1974 | chipnr++; | |
1975 | this->select_chip(mtd, -1); | |
1976 | this->select_chip(mtd, chipnr); | |
30f464b7 | 1977 | |
61b03bd7 | 1978 | /* if BBT requires refresh and BBT-PERCHIP, |
30f464b7 DM |
1979 | * set the BBT page mask to see if this BBT should be rewritten */ |
1980 | if ((this->options & BBT_AUTO_REFRESH) && (this->bbt_td->options & NAND_BBT_PERCHIP)) { | |
1981 | bbt_masked_page = this->bbt_td->pages[chipnr] & BBT_PAGE_MASK; | |
1982 | } | |
1983 | ||
1da177e4 LT |
1984 | } |
1985 | } | |
1986 | instr->state = MTD_ERASE_DONE; | |
1987 | ||
e0c7d767 | 1988 | erase_exit: |
1da177e4 LT |
1989 | |
1990 | ret = instr->state == MTD_ERASE_DONE ? 0 : -EIO; | |
1991 | /* Do call back function */ | |
1992 | if (!ret) | |
1993 | mtd_erase_callback(instr); | |
1994 | ||
1995 | /* Deselect and wake up anyone waiting on the device */ | |
1996 | nand_release_device(mtd); | |
1997 | ||
30f464b7 DM |
1998 | /* if BBT requires refresh and erase was successful, rewrite any selected bad block tables */ |
1999 | if ((this->options & BBT_AUTO_REFRESH) && (!ret)) { | |
2000 | for (chipnr = 0; chipnr < this->numchips; chipnr++) { | |
2001 | if (rewrite_bbt[chipnr]) { | |
2002 | /* update the BBT for chip */ | |
e0c7d767 DW |
2003 | DEBUG(MTD_DEBUG_LEVEL0, "nand_erase_nand: nand_update_bbt (%d:0x%0x 0x%0x)\n", |
2004 | chipnr, rewrite_bbt[chipnr], this->bbt_td->pages[chipnr]); | |
2005 | nand_update_bbt(mtd, rewrite_bbt[chipnr]); | |
30f464b7 DM |
2006 | } |
2007 | } | |
2008 | } | |
2009 | ||
1da177e4 LT |
2010 | /* Return more or less happy */ |
2011 | return ret; | |
2012 | } | |
2013 | ||
2014 | /** | |
2015 | * nand_sync - [MTD Interface] sync | |
2016 | * @mtd: MTD device structure | |
2017 | * | |
2018 | * Sync is actually a wait for chip ready function | |
2019 | */ | |
e0c7d767 | 2020 | static void nand_sync(struct mtd_info *mtd) |
1da177e4 LT |
2021 | { |
2022 | struct nand_chip *this = mtd->priv; | |
2023 | ||
e0c7d767 | 2024 | DEBUG(MTD_DEBUG_LEVEL3, "nand_sync: called\n"); |
1da177e4 LT |
2025 | |
2026 | /* Grab the lock and see if the device is available */ | |
e0c7d767 | 2027 | nand_get_device(this, mtd, FL_SYNCING); |
1da177e4 | 2028 | /* Release it and go back */ |
e0c7d767 | 2029 | nand_release_device(mtd); |
1da177e4 LT |
2030 | } |
2031 | ||
1da177e4 LT |
2032 | /** |
2033 | * nand_block_isbad - [MTD Interface] Check whether the block at the given offset is bad | |
2034 | * @mtd: MTD device structure | |
2035 | * @ofs: offset relative to mtd start | |
2036 | */ | |
e0c7d767 | 2037 | static int nand_block_isbad(struct mtd_info *mtd, loff_t ofs) |
1da177e4 LT |
2038 | { |
2039 | /* Check for invalid offset */ | |
61b03bd7 | 2040 | if (ofs > mtd->size) |
1da177e4 | 2041 | return -EINVAL; |
61b03bd7 | 2042 | |
e0c7d767 | 2043 | return nand_block_checkbad(mtd, ofs, 1, 0); |
1da177e4 LT |
2044 | } |
2045 | ||
2046 | /** | |
2047 | * nand_block_markbad - [MTD Interface] Mark the block at the given offset as bad | |
2048 | * @mtd: MTD device structure | |
2049 | * @ofs: offset relative to mtd start | |
2050 | */ | |
e0c7d767 | 2051 | static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs) |
1da177e4 LT |
2052 | { |
2053 | struct nand_chip *this = mtd->priv; | |
2054 | int ret; | |
2055 | ||
e0c7d767 DW |
2056 | if ((ret = nand_block_isbad(mtd, ofs))) { |
2057 | /* If it was bad already, return success and do nothing. */ | |
1da177e4 LT |
2058 | if (ret > 0) |
2059 | return 0; | |
e0c7d767 DW |
2060 | return ret; |
2061 | } | |
1da177e4 LT |
2062 | |
2063 | return this->block_markbad(mtd, ofs); | |
2064 | } | |
2065 | ||
962034f4 VW |
2066 | /** |
2067 | * nand_suspend - [MTD Interface] Suspend the NAND flash | |
2068 | * @mtd: MTD device structure | |
2069 | */ | |
2070 | static int nand_suspend(struct mtd_info *mtd) | |
2071 | { | |
2072 | struct nand_chip *this = mtd->priv; | |
2073 | ||
e0c7d767 | 2074 | return nand_get_device(this, mtd, FL_PM_SUSPENDED); |
962034f4 VW |
2075 | } |
2076 | ||
2077 | /** | |
2078 | * nand_resume - [MTD Interface] Resume the NAND flash | |
2079 | * @mtd: MTD device structure | |
2080 | */ | |
2081 | static void nand_resume(struct mtd_info *mtd) | |
2082 | { | |
2083 | struct nand_chip *this = mtd->priv; | |
2084 | ||
2085 | if (this->state == FL_PM_SUSPENDED) | |
2086 | nand_release_device(mtd); | |
2087 | else | |
2c0a2bed TG |
2088 | printk(KERN_ERR "nand_resume() called for a chip which is not " |
2089 | "in suspended state\n"); | |
962034f4 VW |
2090 | } |
2091 | ||
a36ed299 TG |
2092 | /* |
2093 | * Free allocated data structures | |
2094 | */ | |
2095 | static void nand_free_kmem(struct nand_chip *this) | |
2096 | { | |
2097 | /* Buffer allocated by nand_scan ? */ | |
2098 | if (this->options & NAND_OOBBUF_ALLOC) | |
2099 | kfree(this->oob_buf); | |
2100 | /* Buffer allocated by nand_scan ? */ | |
2101 | if (this->options & NAND_DATABUF_ALLOC) | |
2102 | kfree(this->data_buf); | |
2103 | /* Controller allocated by nand_scan ? */ | |
2104 | if (this->options & NAND_CONTROLLER_ALLOC) | |
2105 | kfree(this->controller); | |
2106 | } | |
2107 | ||
7aa65bfd TG |
2108 | /* |
2109 | * Allocate buffers and data structures | |
1da177e4 | 2110 | */ |
7aa65bfd | 2111 | static int nand_allocate_kmem(struct mtd_info *mtd, struct nand_chip *this) |
1da177e4 | 2112 | { |
7aa65bfd | 2113 | size_t len; |
1da177e4 | 2114 | |
7aa65bfd TG |
2115 | if (!this->oob_buf) { |
2116 | len = mtd->oobsize << | |
2117 | (this->phys_erase_shift - this->page_shift); | |
2118 | this->oob_buf = kmalloc(len, GFP_KERNEL); | |
2119 | if (!this->oob_buf) | |
2120 | goto outerr; | |
2121 | this->options |= NAND_OOBBUF_ALLOC; | |
552d9205 DW |
2122 | } |
2123 | ||
7aa65bfd | 2124 | if (!this->data_buf) { |
4cbb9b80 | 2125 | len = mtd->writesize + mtd->oobsize; |
7aa65bfd TG |
2126 | this->data_buf = kmalloc(len, GFP_KERNEL); |
2127 | if (!this->data_buf) | |
2128 | goto outerr; | |
2129 | this->options |= NAND_DATABUF_ALLOC; | |
2130 | } | |
2131 | ||
2132 | if (!this->controller) { | |
2133 | this->controller = kzalloc(sizeof(struct nand_hw_control), | |
2134 | GFP_KERNEL); | |
2135 | if (!this->controller) | |
2136 | goto outerr; | |
2137 | this->options |= NAND_CONTROLLER_ALLOC; | |
2138 | } | |
2139 | return 0; | |
1da177e4 | 2140 | |
7aa65bfd TG |
2141 | outerr: |
2142 | printk(KERN_ERR "nand_scan(): Cannot allocate buffers\n"); | |
2143 | nand_free_kmem(this); | |
2144 | return -ENOMEM; | |
2145 | } | |
2146 | ||
2147 | /* | |
2148 | * Set default functions | |
2149 | */ | |
2150 | static void nand_set_defaults(struct nand_chip *this, int busw) | |
2151 | { | |
1da177e4 LT |
2152 | /* check for proper chip_delay setup, set 20us if not */ |
2153 | if (!this->chip_delay) | |
2154 | this->chip_delay = 20; | |
2155 | ||
2156 | /* check, if a user supplied command function given */ | |
2157 | if (this->cmdfunc == NULL) | |
2158 | this->cmdfunc = nand_command; | |
2159 | ||
2160 | /* check, if a user supplied wait function given */ | |
2161 | if (this->waitfunc == NULL) | |
2162 | this->waitfunc = nand_wait; | |
2163 | ||
2164 | if (!this->select_chip) | |
2165 | this->select_chip = nand_select_chip; | |
1da177e4 LT |
2166 | if (!this->read_byte) |
2167 | this->read_byte = busw ? nand_read_byte16 : nand_read_byte; | |
1da177e4 LT |
2168 | if (!this->read_word) |
2169 | this->read_word = nand_read_word; | |
2170 | if (!this->block_bad) | |
2171 | this->block_bad = nand_block_bad; | |
2172 | if (!this->block_markbad) | |
2173 | this->block_markbad = nand_default_block_markbad; | |
2174 | if (!this->write_buf) | |
2175 | this->write_buf = busw ? nand_write_buf16 : nand_write_buf; | |
2176 | if (!this->read_buf) | |
2177 | this->read_buf = busw ? nand_read_buf16 : nand_read_buf; | |
2178 | if (!this->verify_buf) | |
2179 | this->verify_buf = busw ? nand_verify_buf16 : nand_verify_buf; | |
2180 | if (!this->scan_bbt) | |
2181 | this->scan_bbt = nand_default_bbt; | |
7aa65bfd TG |
2182 | } |
2183 | ||
2184 | /* | |
2185 | * Get the flash and manufacturer id and lookup if the typ is supported | |
2186 | */ | |
2187 | static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, | |
2188 | struct nand_chip *this, | |
2189 | int busw, int *maf_id) | |
2190 | { | |
2191 | struct nand_flash_dev *type = NULL; | |
2192 | int i, dev_id, maf_idx; | |
1da177e4 LT |
2193 | |
2194 | /* Select the device */ | |
2195 | this->select_chip(mtd, 0); | |
2196 | ||
2197 | /* Send the command for reading device ID */ | |
e0c7d767 | 2198 | this->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); |
1da177e4 LT |
2199 | |
2200 | /* Read manufacturer and device IDs */ | |
7aa65bfd TG |
2201 | *maf_id = this->read_byte(mtd); |
2202 | dev_id = this->read_byte(mtd); | |
1da177e4 | 2203 | |
7aa65bfd | 2204 | /* Lookup the flash id */ |
1da177e4 | 2205 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { |
7aa65bfd TG |
2206 | if (dev_id == nand_flash_ids[i].id) { |
2207 | type = &nand_flash_ids[i]; | |
2208 | break; | |
2209 | } | |
2210 | } | |
61b03bd7 | 2211 | |
7aa65bfd TG |
2212 | if (!type) |
2213 | return ERR_PTR(-ENODEV); | |
2214 | ||
2215 | this->chipsize = nand_flash_ids[i].chipsize << 20; | |
2216 | ||
2217 | /* Newer devices have all the information in additional id bytes */ | |
2218 | if (!nand_flash_ids[i].pagesize) { | |
2219 | int extid; | |
2220 | /* The 3rd id byte contains non relevant data ATM */ | |
2221 | extid = this->read_byte(mtd); | |
2222 | /* The 4th id byte is the important one */ | |
2223 | extid = this->read_byte(mtd); | |
2224 | /* Calc pagesize */ | |
4cbb9b80 | 2225 | mtd->writesize = 1024 << (extid & 0x3); |
7aa65bfd TG |
2226 | extid >>= 2; |
2227 | /* Calc oobsize */ | |
4cbb9b80 | 2228 | mtd->oobsize = (8 << (extid & 0x01)) * (mtd->writesize >> 9); |
7aa65bfd TG |
2229 | extid >>= 2; |
2230 | /* Calc blocksize. Blocksize is multiples of 64KiB */ | |
2231 | mtd->erasesize = (64 * 1024) << (extid & 0x03); | |
2232 | extid >>= 2; | |
2233 | /* Get buswidth information */ | |
2234 | busw = (extid & 0x01) ? NAND_BUSWIDTH_16 : 0; | |
61b03bd7 | 2235 | |
7aa65bfd TG |
2236 | } else { |
2237 | /* | |
2238 | * Old devices have this data hardcoded in the device id table | |
2239 | */ | |
2240 | mtd->erasesize = nand_flash_ids[i].erasesize; | |
4cbb9b80 TG |
2241 | mtd->writesize = nand_flash_ids[i].pagesize; |
2242 | mtd->oobsize = mtd->writesize / 32; | |
7aa65bfd TG |
2243 | busw = nand_flash_ids[i].options & NAND_BUSWIDTH_16; |
2244 | } | |
1da177e4 | 2245 | |
7aa65bfd TG |
2246 | /* Try to identify manufacturer */ |
2247 | for (maf_idx = 0; nand_manuf_ids[maf_idx].id != 0x0; maf_id++) { | |
2248 | if (nand_manuf_ids[maf_idx].id == *maf_id) | |
2249 | break; | |
2250 | } | |
0ea4a755 | 2251 | |
7aa65bfd TG |
2252 | /* |
2253 | * Check, if buswidth is correct. Hardware drivers should set | |
2254 | * this correct ! | |
2255 | */ | |
2256 | if (busw != (this->options & NAND_BUSWIDTH_16)) { | |
2257 | printk(KERN_INFO "NAND device: Manufacturer ID:" | |
2258 | " 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, | |
2259 | dev_id, nand_manuf_ids[maf_idx].name, mtd->name); | |
2260 | printk(KERN_WARNING "NAND bus width %d instead %d bit\n", | |
2261 | (this->options & NAND_BUSWIDTH_16) ? 16 : 8, | |
2262 | busw ? 16 : 8); | |
2263 | return ERR_PTR(-EINVAL); | |
2264 | } | |
61b03bd7 | 2265 | |
7aa65bfd | 2266 | /* Calculate the address shift from the page size */ |
4cbb9b80 | 2267 | this->page_shift = ffs(mtd->writesize) - 1; |
7aa65bfd TG |
2268 | /* Convert chipsize to number of pages per chip -1. */ |
2269 | this->pagemask = (this->chipsize >> this->page_shift) - 1; | |
61b03bd7 | 2270 | |
7aa65bfd TG |
2271 | this->bbt_erase_shift = this->phys_erase_shift = |
2272 | ffs(mtd->erasesize) - 1; | |
2273 | this->chip_shift = ffs(this->chipsize) - 1; | |
1da177e4 | 2274 | |
7aa65bfd | 2275 | /* Set the bad block position */ |
4cbb9b80 | 2276 | this->badblockpos = mtd->writesize > 512 ? |
7aa65bfd | 2277 | NAND_LARGE_BADBLOCK_POS : NAND_SMALL_BADBLOCK_POS; |
61b03bd7 | 2278 | |
7aa65bfd TG |
2279 | /* Get chip options, preserve non chip based options */ |
2280 | this->options &= ~NAND_CHIPOPTIONS_MSK; | |
2281 | this->options |= nand_flash_ids[i].options & NAND_CHIPOPTIONS_MSK; | |
2282 | ||
2283 | /* | |
2284 | * Set this as a default. Board drivers can override it, if necessary | |
2285 | */ | |
2286 | this->options |= NAND_NO_AUTOINCR; | |
2287 | ||
2288 | /* Check if this is a not a samsung device. Do not clear the | |
2289 | * options for chips which are not having an extended id. | |
2290 | */ | |
2291 | if (*maf_id != NAND_MFR_SAMSUNG && !nand_flash_ids[i].pagesize) | |
2292 | this->options &= ~NAND_SAMSUNG_LP_OPTIONS; | |
2293 | ||
2294 | /* Check for AND chips with 4 page planes */ | |
2295 | if (this->options & NAND_4PAGE_ARRAY) | |
2296 | this->erase_cmd = multi_erase_cmd; | |
2297 | else | |
2298 | this->erase_cmd = single_erase_cmd; | |
2299 | ||
2300 | /* Do not replace user supplied command function ! */ | |
4cbb9b80 | 2301 | if (mtd->writesize > 512 && this->cmdfunc == nand_command) |
7aa65bfd TG |
2302 | this->cmdfunc = nand_command_lp; |
2303 | ||
2304 | printk(KERN_INFO "NAND device: Manufacturer ID:" | |
2305 | " 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, dev_id, | |
2306 | nand_manuf_ids[maf_idx].name, type->name); | |
2307 | ||
2308 | return type; | |
2309 | } | |
2310 | ||
2311 | /* module_text_address() isn't exported, and it's mostly a pointless | |
2312 | test if this is a module _anyway_ -- they'd have to try _really_ hard | |
2313 | to call us from in-kernel code if the core NAND support is modular. */ | |
2314 | #ifdef MODULE | |
2315 | #define caller_is_module() (1) | |
2316 | #else | |
2317 | #define caller_is_module() \ | |
2318 | module_text_address((unsigned long)__builtin_return_address(0)) | |
2319 | #endif | |
2320 | ||
2321 | /** | |
2322 | * nand_scan - [NAND Interface] Scan for the NAND device | |
2323 | * @mtd: MTD device structure | |
2324 | * @maxchips: Number of chips to scan for | |
2325 | * | |
2326 | * This fills out all the uninitialized function pointers | |
2327 | * with the defaults. | |
2328 | * The flash ID is read and the mtd/chip structures are | |
2329 | * filled with the appropriate values. Buffers are allocated if | |
2330 | * they are not provided by the board driver | |
2331 | * The mtd->owner field must be set to the module of the caller | |
2332 | * | |
2333 | */ | |
2334 | int nand_scan(struct mtd_info *mtd, int maxchips) | |
2335 | { | |
2336 | int i, busw, nand_maf_id; | |
2337 | struct nand_chip *this = mtd->priv; | |
2338 | struct nand_flash_dev *type; | |
2339 | ||
2340 | /* Many callers got this wrong, so check for it for a while... */ | |
2341 | if (!mtd->owner && caller_is_module()) { | |
2342 | printk(KERN_CRIT "nand_scan() called with NULL mtd->owner!\n"); | |
2343 | BUG(); | |
1da177e4 LT |
2344 | } |
2345 | ||
7aa65bfd TG |
2346 | /* Get buswidth to select the correct functions */ |
2347 | busw = this->options & NAND_BUSWIDTH_16; | |
2348 | /* Set the default functions */ | |
2349 | nand_set_defaults(this, busw); | |
2350 | ||
2351 | /* Read the flash type */ | |
2352 | type = nand_get_flash_type(mtd, this, busw, &nand_maf_id); | |
2353 | ||
2354 | if (IS_ERR(type)) { | |
e0c7d767 | 2355 | printk(KERN_WARNING "No NAND device found!!!\n"); |
1da177e4 | 2356 | this->select_chip(mtd, -1); |
7aa65bfd | 2357 | return PTR_ERR(type); |
1da177e4 LT |
2358 | } |
2359 | ||
7aa65bfd | 2360 | /* Check for a chip array */ |
e0c7d767 | 2361 | for (i = 1; i < maxchips; i++) { |
1da177e4 | 2362 | this->select_chip(mtd, i); |
1da177e4 | 2363 | /* Send the command for reading device ID */ |
e0c7d767 | 2364 | this->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); |
1da177e4 LT |
2365 | /* Read manufacturer and device IDs */ |
2366 | if (nand_maf_id != this->read_byte(mtd) || | |
7aa65bfd | 2367 | type->id != this->read_byte(mtd)) |
1da177e4 LT |
2368 | break; |
2369 | } | |
2370 | if (i > 1) | |
2371 | printk(KERN_INFO "%d NAND chips detected\n", i); | |
61b03bd7 | 2372 | |
1da177e4 LT |
2373 | /* Store the number of chips and calc total size for mtd */ |
2374 | this->numchips = i; | |
2375 | mtd->size = i * this->chipsize; | |
7aa65bfd TG |
2376 | |
2377 | /* Allocate buffers and data structures */ | |
2378 | if (nand_allocate_kmem(mtd, this)) | |
2379 | return -ENOMEM; | |
2380 | ||
1da177e4 | 2381 | /* Preset the internal oob buffer */ |
7aa65bfd TG |
2382 | memset(this->oob_buf, 0xff, |
2383 | mtd->oobsize << (this->phys_erase_shift - this->page_shift)); | |
1da177e4 | 2384 | |
7aa65bfd TG |
2385 | /* |
2386 | * If no default placement scheme is given, select an appropriate one | |
2387 | */ | |
1da177e4 | 2388 | if (!this->autooob) { |
61b03bd7 | 2389 | switch (mtd->oobsize) { |
1da177e4 LT |
2390 | case 8: |
2391 | this->autooob = &nand_oob_8; | |
2392 | break; | |
2393 | case 16: | |
2394 | this->autooob = &nand_oob_16; | |
2395 | break; | |
2396 | case 64: | |
2397 | this->autooob = &nand_oob_64; | |
2398 | break; | |
2399 | default: | |
7aa65bfd TG |
2400 | printk(KERN_WARNING "No oob scheme defined for " |
2401 | "oobsize %d\n", mtd->oobsize); | |
1da177e4 LT |
2402 | BUG(); |
2403 | } | |
2404 | } | |
61b03bd7 | 2405 | |
7aa65bfd TG |
2406 | /* |
2407 | * The number of bytes available for the filesystem to place fs | |
2408 | * dependend oob data | |
2409 | */ | |
998cf640 TG |
2410 | mtd->oobavail = 0; |
2411 | for (i = 0; this->autooob->oobfree[i][1]; i++) | |
2412 | mtd->oobavail += this->autooob->oobfree[i][1]; | |
1da177e4 | 2413 | |
61b03bd7 | 2414 | /* |
7aa65bfd TG |
2415 | * check ECC mode, default to software if 3byte/512byte hardware ECC is |
2416 | * selected and we have 256 byte pagesize fallback to software ECC | |
e0c7d767 | 2417 | */ |
6dfc6d25 TG |
2418 | switch (this->ecc.mode) { |
2419 | case NAND_ECC_HW: | |
2420 | case NAND_ECC_HW_SYNDROME: | |
2421 | if (!this->ecc.calculate || !this->ecc.correct || | |
2422 | !this->ecc.hwctl) { | |
2423 | printk(KERN_WARNING "No ECC functions supplied, " | |
2424 | "Hardware ECC not possible\n"); | |
2425 | BUG(); | |
2426 | } | |
4cbb9b80 | 2427 | if (mtd->writesize >= this->ecc.size) |
6dfc6d25 TG |
2428 | break; |
2429 | printk(KERN_WARNING "%d byte HW ECC not possible on " | |
2430 | "%d byte page size, fallback to SW ECC\n", | |
4cbb9b80 | 2431 | this->ecc.size, mtd->writesize); |
6dfc6d25 | 2432 | this->ecc.mode = NAND_ECC_SOFT; |
61b03bd7 | 2433 | |
6dfc6d25 TG |
2434 | case NAND_ECC_SOFT: |
2435 | this->ecc.calculate = nand_calculate_ecc; | |
2436 | this->ecc.correct = nand_correct_data; | |
2437 | this->ecc.size = 256; | |
2438 | this->ecc.bytes = 3; | |
1da177e4 | 2439 | break; |
61b03bd7 TG |
2440 | |
2441 | case NAND_ECC_NONE: | |
7aa65bfd TG |
2442 | printk(KERN_WARNING "NAND_ECC_NONE selected by board driver. " |
2443 | "This is not recommended !!\n"); | |
4cbb9b80 | 2444 | this->ecc.size = mtd->writesize; |
6dfc6d25 | 2445 | this->ecc.bytes = 0; |
1da177e4 | 2446 | break; |
1da177e4 | 2447 | default: |
7aa65bfd | 2448 | printk(KERN_WARNING "Invalid NAND_ECC_MODE %d\n", |
6dfc6d25 | 2449 | this->ecc.mode); |
61b03bd7 | 2450 | BUG(); |
1da177e4 | 2451 | } |
61b03bd7 | 2452 | |
7aa65bfd TG |
2453 | /* |
2454 | * Set the number of read / write steps for one page depending on ECC | |
2455 | * mode | |
2456 | */ | |
4cbb9b80 TG |
2457 | this->ecc.steps = mtd->writesize / this->ecc.size; |
2458 | if(this->ecc.steps * this->ecc.size != mtd->writesize) { | |
6dfc6d25 TG |
2459 | printk(KERN_WARNING "Invalid ecc parameters\n"); |
2460 | BUG(); | |
1da177e4 | 2461 | } |
61b03bd7 | 2462 | |
1da177e4 LT |
2463 | /* Initialize state, waitqueue and spinlock */ |
2464 | this->state = FL_READY; | |
a36ed299 TG |
2465 | init_waitqueue_head(&this->controller->wq); |
2466 | spin_lock_init(&this->controller->lock); | |
1da177e4 LT |
2467 | |
2468 | /* De-select the device */ | |
2469 | this->select_chip(mtd, -1); | |
2470 | ||
2471 | /* Invalidate the pagebuffer reference */ | |
2472 | this->pagebuf = -1; | |
2473 | ||
2474 | /* Fill in remaining MTD driver data */ | |
2475 | mtd->type = MTD_NANDFLASH; | |
5fa43394 | 2476 | mtd->flags = MTD_CAP_NANDFLASH; |
1da177e4 LT |
2477 | mtd->ecctype = MTD_ECC_SW; |
2478 | mtd->erase = nand_erase; | |
2479 | mtd->point = NULL; | |
2480 | mtd->unpoint = NULL; | |
2481 | mtd->read = nand_read; | |
2482 | mtd->write = nand_write; | |
1da177e4 LT |
2483 | mtd->read_oob = nand_read_oob; |
2484 | mtd->write_oob = nand_write_oob; | |
1da177e4 LT |
2485 | mtd->sync = nand_sync; |
2486 | mtd->lock = NULL; | |
2487 | mtd->unlock = NULL; | |
962034f4 VW |
2488 | mtd->suspend = nand_suspend; |
2489 | mtd->resume = nand_resume; | |
1da177e4 LT |
2490 | mtd->block_isbad = nand_block_isbad; |
2491 | mtd->block_markbad = nand_block_markbad; | |
2492 | ||
2493 | /* and make the autooob the default one */ | |
2494 | memcpy(&mtd->oobinfo, this->autooob, sizeof(mtd->oobinfo)); | |
2495 | ||
0040bf38 TG |
2496 | /* Check, if we should skip the bad block table scan */ |
2497 | if (this->options & NAND_SKIP_BBTSCAN) | |
2498 | return 0; | |
1da177e4 LT |
2499 | |
2500 | /* Build bad block table */ | |
e0c7d767 | 2501 | return this->scan_bbt(mtd); |
1da177e4 LT |
2502 | } |
2503 | ||
2504 | /** | |
61b03bd7 | 2505 | * nand_release - [NAND Interface] Free resources held by the NAND device |
1da177e4 LT |
2506 | * @mtd: MTD device structure |
2507 | */ | |
e0c7d767 | 2508 | void nand_release(struct mtd_info *mtd) |
1da177e4 LT |
2509 | { |
2510 | struct nand_chip *this = mtd->priv; | |
2511 | ||
2512 | #ifdef CONFIG_MTD_PARTITIONS | |
2513 | /* Deregister partitions */ | |
e0c7d767 | 2514 | del_mtd_partitions(mtd); |
1da177e4 LT |
2515 | #endif |
2516 | /* Deregister the device */ | |
e0c7d767 | 2517 | del_mtd_device(mtd); |
1da177e4 | 2518 | |
fa671646 | 2519 | /* Free bad block table memory */ |
e0c7d767 | 2520 | kfree(this->bbt); |
a36ed299 TG |
2521 | /* Free buffers */ |
2522 | nand_free_kmem(this); | |
1da177e4 LT |
2523 | } |
2524 | ||
e0c7d767 DW |
2525 | EXPORT_SYMBOL_GPL(nand_scan); |
2526 | EXPORT_SYMBOL_GPL(nand_release); | |
8fe833c1 RP |
2527 | |
2528 | static int __init nand_base_init(void) | |
2529 | { | |
2530 | led_trigger_register_simple("nand-disk", &nand_led_trigger); | |
2531 | return 0; | |
2532 | } | |
2533 | ||
2534 | static void __exit nand_base_exit(void) | |
2535 | { | |
2536 | led_trigger_unregister_simple(nand_led_trigger); | |
2537 | } | |
2538 | ||
2539 | module_init(nand_base_init); | |
2540 | module_exit(nand_base_exit); | |
2541 | ||
e0c7d767 DW |
2542 | MODULE_LICENSE("GPL"); |
2543 | MODULE_AUTHOR("Steven J. Hill <sjhill@realitydiluted.com>, Thomas Gleixner <tglx@linutronix.de>"); | |
2544 | MODULE_DESCRIPTION("Generic NAND flash driver code"); |