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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) |
ace4dfee | 13 | * 2002-2006 Thomas Gleixner (tglx@linutronix.de) |
1da177e4 | 14 | * |
ace4dfee | 15 | * Credits: |
61b03bd7 TG |
16 | * David Woodhouse for adding multichip support |
17 | * | |
1da177e4 LT |
18 | * Aleph One Ltd. and Toby Churchill Ltd. for supporting the |
19 | * rework for 2K page size chips | |
20 | * | |
ace4dfee | 21 | * TODO: |
1da177e4 LT |
22 | * Enable cached programming for 2k page size chips |
23 | * Check, if mtd->ecctype should be set to MTD_ECC_HW | |
24 | * if we have HW ecc support. | |
25 | * The AG-AND chips have nice features for speed improvement, | |
26 | * which are not supported yet. Read / program 4 pages in one go. | |
27 | * | |
1da177e4 LT |
28 | * This program is free software; you can redistribute it and/or modify |
29 | * it under the terms of the GNU General Public License version 2 as | |
30 | * published by the Free Software Foundation. | |
31 | * | |
32 | */ | |
33 | ||
552d9205 | 34 | #include <linux/module.h> |
1da177e4 LT |
35 | #include <linux/delay.h> |
36 | #include <linux/errno.h> | |
7aa65bfd | 37 | #include <linux/err.h> |
1da177e4 LT |
38 | #include <linux/sched.h> |
39 | #include <linux/slab.h> | |
40 | #include <linux/types.h> | |
41 | #include <linux/mtd/mtd.h> | |
42 | #include <linux/mtd/nand.h> | |
43 | #include <linux/mtd/nand_ecc.h> | |
44 | #include <linux/mtd/compatmac.h> | |
45 | #include <linux/interrupt.h> | |
46 | #include <linux/bitops.h> | |
8fe833c1 | 47 | #include <linux/leds.h> |
1da177e4 LT |
48 | #include <asm/io.h> |
49 | ||
50 | #ifdef CONFIG_MTD_PARTITIONS | |
51 | #include <linux/mtd/partitions.h> | |
52 | #endif | |
53 | ||
54 | /* Define default oob placement schemes for large and small page devices */ | |
5bd34c09 | 55 | static struct nand_ecclayout nand_oob_8 = { |
1da177e4 LT |
56 | .eccbytes = 3, |
57 | .eccpos = {0, 1, 2}, | |
5bd34c09 TG |
58 | .oobfree = { |
59 | {.offset = 3, | |
60 | .length = 2}, | |
61 | {.offset = 6, | |
62 | .length = 2}} | |
1da177e4 LT |
63 | }; |
64 | ||
5bd34c09 | 65 | static struct nand_ecclayout nand_oob_16 = { |
1da177e4 LT |
66 | .eccbytes = 6, |
67 | .eccpos = {0, 1, 2, 3, 6, 7}, | |
5bd34c09 TG |
68 | .oobfree = { |
69 | {.offset = 8, | |
70 | . length = 8}} | |
1da177e4 LT |
71 | }; |
72 | ||
5bd34c09 | 73 | static struct nand_ecclayout nand_oob_64 = { |
1da177e4 LT |
74 | .eccbytes = 24, |
75 | .eccpos = { | |
e0c7d767 DW |
76 | 40, 41, 42, 43, 44, 45, 46, 47, |
77 | 48, 49, 50, 51, 52, 53, 54, 55, | |
78 | 56, 57, 58, 59, 60, 61, 62, 63}, | |
5bd34c09 TG |
79 | .oobfree = { |
80 | {.offset = 2, | |
81 | .length = 38}} | |
1da177e4 LT |
82 | }; |
83 | ||
ace4dfee | 84 | static int nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, |
2c0a2bed | 85 | int new_state); |
1da177e4 | 86 | |
8593fbc6 TG |
87 | static int nand_do_write_oob(struct mtd_info *mtd, loff_t to, |
88 | struct mtd_oob_ops *ops); | |
89 | ||
d470a97c TG |
90 | /* |
91 | * For devices which display every fart in the system on a seperate LED. Is | |
92 | * compiled away when LED support is disabled. | |
93 | */ | |
94 | DEFINE_LED_TRIGGER(nand_led_trigger); | |
95 | ||
1da177e4 LT |
96 | /** |
97 | * nand_release_device - [GENERIC] release chip | |
98 | * @mtd: MTD device structure | |
61b03bd7 TG |
99 | * |
100 | * Deselect, release chip lock and wake up anyone waiting on the device | |
1da177e4 | 101 | */ |
e0c7d767 | 102 | static void nand_release_device(struct mtd_info *mtd) |
1da177e4 | 103 | { |
ace4dfee | 104 | struct nand_chip *chip = mtd->priv; |
1da177e4 LT |
105 | |
106 | /* De-select the NAND device */ | |
ace4dfee | 107 | chip->select_chip(mtd, -1); |
0dfc6246 | 108 | |
a36ed299 | 109 | /* Release the controller and the chip */ |
ace4dfee TG |
110 | spin_lock(&chip->controller->lock); |
111 | chip->controller->active = NULL; | |
112 | chip->state = FL_READY; | |
113 | wake_up(&chip->controller->wq); | |
114 | spin_unlock(&chip->controller->lock); | |
1da177e4 LT |
115 | } |
116 | ||
117 | /** | |
118 | * nand_read_byte - [DEFAULT] read one byte from the chip | |
119 | * @mtd: MTD device structure | |
120 | * | |
121 | * Default read function for 8bit buswith | |
122 | */ | |
58dd8f2b | 123 | static uint8_t nand_read_byte(struct mtd_info *mtd) |
1da177e4 | 124 | { |
ace4dfee TG |
125 | struct nand_chip *chip = mtd->priv; |
126 | return readb(chip->IO_ADDR_R); | |
1da177e4 LT |
127 | } |
128 | ||
1da177e4 LT |
129 | /** |
130 | * nand_read_byte16 - [DEFAULT] read one byte endianess aware from the chip | |
131 | * @mtd: MTD device structure | |
132 | * | |
61b03bd7 | 133 | * Default read function for 16bit buswith with |
1da177e4 LT |
134 | * endianess conversion |
135 | */ | |
58dd8f2b | 136 | static uint8_t nand_read_byte16(struct mtd_info *mtd) |
1da177e4 | 137 | { |
ace4dfee TG |
138 | struct nand_chip *chip = mtd->priv; |
139 | return (uint8_t) cpu_to_le16(readw(chip->IO_ADDR_R)); | |
1da177e4 LT |
140 | } |
141 | ||
1da177e4 LT |
142 | /** |
143 | * nand_read_word - [DEFAULT] read one word from the chip | |
144 | * @mtd: MTD device structure | |
145 | * | |
61b03bd7 | 146 | * Default read function for 16bit buswith without |
1da177e4 LT |
147 | * endianess conversion |
148 | */ | |
149 | static u16 nand_read_word(struct mtd_info *mtd) | |
150 | { | |
ace4dfee TG |
151 | struct nand_chip *chip = mtd->priv; |
152 | return readw(chip->IO_ADDR_R); | |
1da177e4 LT |
153 | } |
154 | ||
1da177e4 LT |
155 | /** |
156 | * nand_select_chip - [DEFAULT] control CE line | |
157 | * @mtd: MTD device structure | |
844d3b42 | 158 | * @chipnr: chipnumber to select, -1 for deselect |
1da177e4 LT |
159 | * |
160 | * Default select function for 1 chip devices. | |
161 | */ | |
ace4dfee | 162 | static void nand_select_chip(struct mtd_info *mtd, int chipnr) |
1da177e4 | 163 | { |
ace4dfee TG |
164 | struct nand_chip *chip = mtd->priv; |
165 | ||
166 | switch (chipnr) { | |
1da177e4 | 167 | case -1: |
ace4dfee | 168 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); |
1da177e4 LT |
169 | break; |
170 | case 0: | |
1da177e4 LT |
171 | break; |
172 | ||
173 | default: | |
174 | BUG(); | |
175 | } | |
176 | } | |
177 | ||
178 | /** | |
179 | * nand_write_buf - [DEFAULT] write buffer to chip | |
180 | * @mtd: MTD device structure | |
181 | * @buf: data buffer | |
182 | * @len: number of bytes to write | |
183 | * | |
184 | * Default write function for 8bit buswith | |
185 | */ | |
58dd8f2b | 186 | static void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) |
1da177e4 LT |
187 | { |
188 | int i; | |
ace4dfee | 189 | struct nand_chip *chip = mtd->priv; |
1da177e4 | 190 | |
e0c7d767 | 191 | for (i = 0; i < len; i++) |
ace4dfee | 192 | writeb(buf[i], chip->IO_ADDR_W); |
1da177e4 LT |
193 | } |
194 | ||
195 | /** | |
61b03bd7 | 196 | * nand_read_buf - [DEFAULT] read chip data into buffer |
1da177e4 LT |
197 | * @mtd: MTD device structure |
198 | * @buf: buffer to store date | |
199 | * @len: number of bytes to read | |
200 | * | |
201 | * Default read function for 8bit buswith | |
202 | */ | |
58dd8f2b | 203 | static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) |
1da177e4 LT |
204 | { |
205 | int i; | |
ace4dfee | 206 | struct nand_chip *chip = mtd->priv; |
1da177e4 | 207 | |
e0c7d767 | 208 | for (i = 0; i < len; i++) |
ace4dfee | 209 | buf[i] = readb(chip->IO_ADDR_R); |
1da177e4 LT |
210 | } |
211 | ||
212 | /** | |
61b03bd7 | 213 | * nand_verify_buf - [DEFAULT] Verify chip data against buffer |
1da177e4 LT |
214 | * @mtd: MTD device structure |
215 | * @buf: buffer containing the data to compare | |
216 | * @len: number of bytes to compare | |
217 | * | |
218 | * Default verify function for 8bit buswith | |
219 | */ | |
58dd8f2b | 220 | static int nand_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len) |
1da177e4 LT |
221 | { |
222 | int i; | |
ace4dfee | 223 | struct nand_chip *chip = mtd->priv; |
1da177e4 | 224 | |
e0c7d767 | 225 | for (i = 0; i < len; i++) |
ace4dfee | 226 | if (buf[i] != readb(chip->IO_ADDR_R)) |
1da177e4 | 227 | return -EFAULT; |
1da177e4 LT |
228 | return 0; |
229 | } | |
230 | ||
231 | /** | |
232 | * nand_write_buf16 - [DEFAULT] write buffer to chip | |
233 | * @mtd: MTD device structure | |
234 | * @buf: data buffer | |
235 | * @len: number of bytes to write | |
236 | * | |
237 | * Default write function for 16bit buswith | |
238 | */ | |
58dd8f2b | 239 | static void nand_write_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) |
1da177e4 LT |
240 | { |
241 | int i; | |
ace4dfee | 242 | struct nand_chip *chip = mtd->priv; |
1da177e4 LT |
243 | u16 *p = (u16 *) buf; |
244 | len >>= 1; | |
61b03bd7 | 245 | |
e0c7d767 | 246 | for (i = 0; i < len; i++) |
ace4dfee | 247 | writew(p[i], chip->IO_ADDR_W); |
61b03bd7 | 248 | |
1da177e4 LT |
249 | } |
250 | ||
251 | /** | |
61b03bd7 | 252 | * nand_read_buf16 - [DEFAULT] read chip data into buffer |
1da177e4 LT |
253 | * @mtd: MTD device structure |
254 | * @buf: buffer to store date | |
255 | * @len: number of bytes to read | |
256 | * | |
257 | * Default read function for 16bit buswith | |
258 | */ | |
58dd8f2b | 259 | static void nand_read_buf16(struct mtd_info *mtd, uint8_t *buf, int len) |
1da177e4 LT |
260 | { |
261 | int i; | |
ace4dfee | 262 | struct nand_chip *chip = mtd->priv; |
1da177e4 LT |
263 | u16 *p = (u16 *) buf; |
264 | len >>= 1; | |
265 | ||
e0c7d767 | 266 | for (i = 0; i < len; i++) |
ace4dfee | 267 | p[i] = readw(chip->IO_ADDR_R); |
1da177e4 LT |
268 | } |
269 | ||
270 | /** | |
61b03bd7 | 271 | * nand_verify_buf16 - [DEFAULT] Verify chip data against buffer |
1da177e4 LT |
272 | * @mtd: MTD device structure |
273 | * @buf: buffer containing the data to compare | |
274 | * @len: number of bytes to compare | |
275 | * | |
276 | * Default verify function for 16bit buswith | |
277 | */ | |
58dd8f2b | 278 | static int nand_verify_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) |
1da177e4 LT |
279 | { |
280 | int i; | |
ace4dfee | 281 | struct nand_chip *chip = mtd->priv; |
1da177e4 LT |
282 | u16 *p = (u16 *) buf; |
283 | len >>= 1; | |
284 | ||
e0c7d767 | 285 | for (i = 0; i < len; i++) |
ace4dfee | 286 | if (p[i] != readw(chip->IO_ADDR_R)) |
1da177e4 LT |
287 | return -EFAULT; |
288 | ||
289 | return 0; | |
290 | } | |
291 | ||
292 | /** | |
293 | * nand_block_bad - [DEFAULT] Read bad block marker from the chip | |
294 | * @mtd: MTD device structure | |
295 | * @ofs: offset from device start | |
296 | * @getchip: 0, if the chip is already selected | |
297 | * | |
61b03bd7 | 298 | * Check, if the block is bad. |
1da177e4 LT |
299 | */ |
300 | static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) | |
301 | { | |
302 | int page, chipnr, res = 0; | |
ace4dfee | 303 | struct nand_chip *chip = mtd->priv; |
1da177e4 LT |
304 | u16 bad; |
305 | ||
306 | if (getchip) { | |
ace4dfee TG |
307 | page = (int)(ofs >> chip->page_shift); |
308 | chipnr = (int)(ofs >> chip->chip_shift); | |
1da177e4 | 309 | |
ace4dfee | 310 | nand_get_device(chip, mtd, FL_READING); |
1da177e4 LT |
311 | |
312 | /* Select the NAND device */ | |
ace4dfee | 313 | chip->select_chip(mtd, chipnr); |
61b03bd7 | 314 | } else |
e0c7d767 | 315 | page = (int)ofs; |
1da177e4 | 316 | |
ace4dfee TG |
317 | if (chip->options & NAND_BUSWIDTH_16) { |
318 | chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos & 0xFE, | |
319 | page & chip->pagemask); | |
320 | bad = cpu_to_le16(chip->read_word(mtd)); | |
321 | if (chip->badblockpos & 0x1) | |
49196f33 | 322 | bad >>= 8; |
1da177e4 LT |
323 | if ((bad & 0xFF) != 0xff) |
324 | res = 1; | |
325 | } else { | |
ace4dfee TG |
326 | chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos, |
327 | page & chip->pagemask); | |
328 | if (chip->read_byte(mtd) != 0xff) | |
1da177e4 LT |
329 | res = 1; |
330 | } | |
61b03bd7 | 331 | |
ace4dfee | 332 | if (getchip) |
1da177e4 | 333 | nand_release_device(mtd); |
61b03bd7 | 334 | |
1da177e4 LT |
335 | return res; |
336 | } | |
337 | ||
338 | /** | |
339 | * nand_default_block_markbad - [DEFAULT] mark a block bad | |
340 | * @mtd: MTD device structure | |
341 | * @ofs: offset from device start | |
342 | * | |
343 | * This is the default implementation, which can be overridden by | |
344 | * a hardware specific driver. | |
345 | */ | |
346 | static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs) | |
347 | { | |
ace4dfee | 348 | struct nand_chip *chip = mtd->priv; |
58dd8f2b | 349 | uint8_t buf[2] = { 0, 0 }; |
f1a28c02 | 350 | int block, ret; |
61b03bd7 | 351 | |
1da177e4 | 352 | /* Get block number */ |
ace4dfee TG |
353 | block = ((int)ofs) >> chip->bbt_erase_shift; |
354 | if (chip->bbt) | |
355 | chip->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1); | |
1da177e4 LT |
356 | |
357 | /* Do we have a flash based bad block table ? */ | |
ace4dfee | 358 | if (chip->options & NAND_USE_FLASH_BBT) |
f1a28c02 TG |
359 | ret = nand_update_bbt(mtd, ofs); |
360 | else { | |
361 | /* We write two bytes, so we dont have to mess with 16 bit | |
362 | * access | |
363 | */ | |
364 | ofs += mtd->oobsize; | |
365 | chip->ops.len = 2; | |
366 | chip->ops.datbuf = NULL; | |
367 | chip->ops.oobbuf = buf; | |
368 | chip->ops.ooboffs = chip->badblockpos & ~0x01; | |
369 | ||
370 | ret = nand_do_write_oob(mtd, ofs, &chip->ops); | |
371 | } | |
372 | if (!ret) | |
373 | mtd->ecc_stats.badblocks++; | |
374 | return ret; | |
1da177e4 LT |
375 | } |
376 | ||
61b03bd7 | 377 | /** |
1da177e4 LT |
378 | * nand_check_wp - [GENERIC] check if the chip is write protected |
379 | * @mtd: MTD device structure | |
61b03bd7 | 380 | * Check, if the device is write protected |
1da177e4 | 381 | * |
61b03bd7 | 382 | * The function expects, that the device is already selected |
1da177e4 | 383 | */ |
e0c7d767 | 384 | static int nand_check_wp(struct mtd_info *mtd) |
1da177e4 | 385 | { |
ace4dfee | 386 | struct nand_chip *chip = mtd->priv; |
1da177e4 | 387 | /* Check the WP bit */ |
ace4dfee TG |
388 | chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); |
389 | return (chip->read_byte(mtd) & NAND_STATUS_WP) ? 0 : 1; | |
1da177e4 LT |
390 | } |
391 | ||
392 | /** | |
393 | * nand_block_checkbad - [GENERIC] Check if a block is marked bad | |
394 | * @mtd: MTD device structure | |
395 | * @ofs: offset from device start | |
396 | * @getchip: 0, if the chip is already selected | |
397 | * @allowbbt: 1, if its allowed to access the bbt area | |
398 | * | |
399 | * Check, if the block is bad. Either by reading the bad block table or | |
400 | * calling of the scan function. | |
401 | */ | |
2c0a2bed TG |
402 | static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, |
403 | int allowbbt) | |
1da177e4 | 404 | { |
ace4dfee | 405 | struct nand_chip *chip = mtd->priv; |
61b03bd7 | 406 | |
ace4dfee TG |
407 | if (!chip->bbt) |
408 | return chip->block_bad(mtd, ofs, getchip); | |
61b03bd7 | 409 | |
1da177e4 | 410 | /* Return info from the table */ |
e0c7d767 | 411 | return nand_isbad_bbt(mtd, ofs, allowbbt); |
1da177e4 LT |
412 | } |
413 | ||
61b03bd7 | 414 | /* |
3b88775c TG |
415 | * Wait for the ready pin, after a command |
416 | * The timeout is catched later. | |
417 | */ | |
418 | static void nand_wait_ready(struct mtd_info *mtd) | |
419 | { | |
ace4dfee | 420 | struct nand_chip *chip = mtd->priv; |
e0c7d767 | 421 | unsigned long timeo = jiffies + 2; |
3b88775c | 422 | |
8fe833c1 | 423 | led_trigger_event(nand_led_trigger, LED_FULL); |
3b88775c TG |
424 | /* wait until command is processed or timeout occures */ |
425 | do { | |
ace4dfee | 426 | if (chip->dev_ready(mtd)) |
8fe833c1 | 427 | break; |
8446f1d3 | 428 | touch_softlockup_watchdog(); |
61b03bd7 | 429 | } while (time_before(jiffies, timeo)); |
8fe833c1 | 430 | led_trigger_event(nand_led_trigger, LED_OFF); |
3b88775c TG |
431 | } |
432 | ||
1da177e4 LT |
433 | /** |
434 | * nand_command - [DEFAULT] Send command to NAND device | |
435 | * @mtd: MTD device structure | |
436 | * @command: the command to be sent | |
437 | * @column: the column address for this command, -1 if none | |
438 | * @page_addr: the page address for this command, -1 if none | |
439 | * | |
440 | * Send command to NAND device. This function is used for small page | |
441 | * devices (256/512 Bytes per page) | |
442 | */ | |
7abd3ef9 TG |
443 | static void nand_command(struct mtd_info *mtd, unsigned int command, |
444 | int column, int page_addr) | |
1da177e4 | 445 | { |
ace4dfee | 446 | register struct nand_chip *chip = mtd->priv; |
7abd3ef9 | 447 | int ctrl = NAND_CTRL_CLE | NAND_CTRL_CHANGE; |
1da177e4 | 448 | |
1da177e4 LT |
449 | /* |
450 | * Write out the command to the device. | |
451 | */ | |
452 | if (command == NAND_CMD_SEQIN) { | |
453 | int readcmd; | |
454 | ||
28318776 | 455 | if (column >= mtd->writesize) { |
1da177e4 | 456 | /* OOB area */ |
28318776 | 457 | column -= mtd->writesize; |
1da177e4 LT |
458 | readcmd = NAND_CMD_READOOB; |
459 | } else if (column < 256) { | |
460 | /* First 256 bytes --> READ0 */ | |
461 | readcmd = NAND_CMD_READ0; | |
462 | } else { | |
463 | column -= 256; | |
464 | readcmd = NAND_CMD_READ1; | |
465 | } | |
ace4dfee | 466 | chip->cmd_ctrl(mtd, readcmd, ctrl); |
7abd3ef9 | 467 | ctrl &= ~NAND_CTRL_CHANGE; |
1da177e4 | 468 | } |
ace4dfee | 469 | chip->cmd_ctrl(mtd, command, ctrl); |
1da177e4 | 470 | |
7abd3ef9 TG |
471 | /* |
472 | * Address cycle, when necessary | |
473 | */ | |
474 | ctrl = NAND_CTRL_ALE | NAND_CTRL_CHANGE; | |
475 | /* Serially input address */ | |
476 | if (column != -1) { | |
477 | /* Adjust columns for 16 bit buswidth */ | |
ace4dfee | 478 | if (chip->options & NAND_BUSWIDTH_16) |
7abd3ef9 | 479 | column >>= 1; |
ace4dfee | 480 | chip->cmd_ctrl(mtd, column, ctrl); |
7abd3ef9 TG |
481 | ctrl &= ~NAND_CTRL_CHANGE; |
482 | } | |
483 | if (page_addr != -1) { | |
ace4dfee | 484 | chip->cmd_ctrl(mtd, page_addr, ctrl); |
7abd3ef9 | 485 | ctrl &= ~NAND_CTRL_CHANGE; |
ace4dfee | 486 | chip->cmd_ctrl(mtd, page_addr >> 8, ctrl); |
7abd3ef9 | 487 | /* One more address cycle for devices > 32MiB */ |
ace4dfee TG |
488 | if (chip->chipsize > (32 << 20)) |
489 | chip->cmd_ctrl(mtd, page_addr >> 16, ctrl); | |
1da177e4 | 490 | } |
ace4dfee | 491 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
61b03bd7 TG |
492 | |
493 | /* | |
494 | * program and erase have their own busy handlers | |
1da177e4 | 495 | * status and sequential in needs no delay |
e0c7d767 | 496 | */ |
1da177e4 | 497 | switch (command) { |
61b03bd7 | 498 | |
1da177e4 LT |
499 | case NAND_CMD_PAGEPROG: |
500 | case NAND_CMD_ERASE1: | |
501 | case NAND_CMD_ERASE2: | |
502 | case NAND_CMD_SEQIN: | |
503 | case NAND_CMD_STATUS: | |
504 | return; | |
505 | ||
506 | case NAND_CMD_RESET: | |
ace4dfee | 507 | if (chip->dev_ready) |
1da177e4 | 508 | break; |
ace4dfee TG |
509 | udelay(chip->chip_delay); |
510 | chip->cmd_ctrl(mtd, NAND_CMD_STATUS, | |
7abd3ef9 | 511 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); |
12efdde3 TG |
512 | chip->cmd_ctrl(mtd, |
513 | NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); | |
ace4dfee | 514 | while (!(chip->read_byte(mtd) & NAND_STATUS_READY)) ; |
1da177e4 LT |
515 | return; |
516 | ||
e0c7d767 | 517 | /* This applies to read commands */ |
1da177e4 | 518 | default: |
61b03bd7 | 519 | /* |
1da177e4 LT |
520 | * If we don't have access to the busy pin, we apply the given |
521 | * command delay | |
e0c7d767 | 522 | */ |
ace4dfee TG |
523 | if (!chip->dev_ready) { |
524 | udelay(chip->chip_delay); | |
1da177e4 | 525 | return; |
61b03bd7 | 526 | } |
1da177e4 | 527 | } |
1da177e4 LT |
528 | /* Apply this short delay always to ensure that we do wait tWB in |
529 | * any case on any machine. */ | |
e0c7d767 | 530 | ndelay(100); |
3b88775c TG |
531 | |
532 | nand_wait_ready(mtd); | |
1da177e4 LT |
533 | } |
534 | ||
535 | /** | |
536 | * nand_command_lp - [DEFAULT] Send command to NAND large page device | |
537 | * @mtd: MTD device structure | |
538 | * @command: the command to be sent | |
539 | * @column: the column address for this command, -1 if none | |
540 | * @page_addr: the page address for this command, -1 if none | |
541 | * | |
7abd3ef9 TG |
542 | * Send command to NAND device. This is the version for the new large page |
543 | * devices We dont have the separate regions as we have in the small page | |
544 | * devices. We must emulate NAND_CMD_READOOB to keep the code compatible. | |
1da177e4 | 545 | */ |
7abd3ef9 TG |
546 | static void nand_command_lp(struct mtd_info *mtd, unsigned int command, |
547 | int column, int page_addr) | |
1da177e4 | 548 | { |
ace4dfee | 549 | register struct nand_chip *chip = mtd->priv; |
1da177e4 LT |
550 | |
551 | /* Emulate NAND_CMD_READOOB */ | |
552 | if (command == NAND_CMD_READOOB) { | |
28318776 | 553 | column += mtd->writesize; |
1da177e4 LT |
554 | command = NAND_CMD_READ0; |
555 | } | |
61b03bd7 | 556 | |
7abd3ef9 | 557 | /* Command latch cycle */ |
ace4dfee | 558 | chip->cmd_ctrl(mtd, command & 0xff, |
7abd3ef9 | 559 | NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE); |
1da177e4 LT |
560 | |
561 | if (column != -1 || page_addr != -1) { | |
7abd3ef9 | 562 | int ctrl = NAND_CTRL_CHANGE | NAND_NCE | NAND_ALE; |
1da177e4 LT |
563 | |
564 | /* Serially input address */ | |
565 | if (column != -1) { | |
566 | /* Adjust columns for 16 bit buswidth */ | |
ace4dfee | 567 | if (chip->options & NAND_BUSWIDTH_16) |
1da177e4 | 568 | column >>= 1; |
ace4dfee | 569 | chip->cmd_ctrl(mtd, column, ctrl); |
7abd3ef9 | 570 | ctrl &= ~NAND_CTRL_CHANGE; |
ace4dfee | 571 | chip->cmd_ctrl(mtd, column >> 8, ctrl); |
61b03bd7 | 572 | } |
1da177e4 | 573 | if (page_addr != -1) { |
ace4dfee TG |
574 | chip->cmd_ctrl(mtd, page_addr, ctrl); |
575 | chip->cmd_ctrl(mtd, page_addr >> 8, | |
7abd3ef9 | 576 | NAND_NCE | NAND_ALE); |
1da177e4 | 577 | /* One more address cycle for devices > 128MiB */ |
ace4dfee TG |
578 | if (chip->chipsize > (128 << 20)) |
579 | chip->cmd_ctrl(mtd, page_addr >> 16, | |
7abd3ef9 | 580 | NAND_NCE | NAND_ALE); |
1da177e4 | 581 | } |
1da177e4 | 582 | } |
ace4dfee | 583 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
61b03bd7 TG |
584 | |
585 | /* | |
586 | * program and erase have their own busy handlers | |
30f464b7 DM |
587 | * status, sequential in, and deplete1 need no delay |
588 | */ | |
1da177e4 | 589 | switch (command) { |
61b03bd7 | 590 | |
1da177e4 LT |
591 | case NAND_CMD_CACHEDPROG: |
592 | case NAND_CMD_PAGEPROG: | |
593 | case NAND_CMD_ERASE1: | |
594 | case NAND_CMD_ERASE2: | |
595 | case NAND_CMD_SEQIN: | |
7bc3312b | 596 | case NAND_CMD_RNDIN: |
1da177e4 | 597 | case NAND_CMD_STATUS: |
30f464b7 | 598 | case NAND_CMD_DEPLETE1: |
1da177e4 LT |
599 | return; |
600 | ||
e0c7d767 DW |
601 | /* |
602 | * read error status commands require only a short delay | |
603 | */ | |
30f464b7 DM |
604 | case NAND_CMD_STATUS_ERROR: |
605 | case NAND_CMD_STATUS_ERROR0: | |
606 | case NAND_CMD_STATUS_ERROR1: | |
607 | case NAND_CMD_STATUS_ERROR2: | |
608 | case NAND_CMD_STATUS_ERROR3: | |
ace4dfee | 609 | udelay(chip->chip_delay); |
30f464b7 | 610 | return; |
1da177e4 LT |
611 | |
612 | case NAND_CMD_RESET: | |
ace4dfee | 613 | if (chip->dev_ready) |
1da177e4 | 614 | break; |
ace4dfee | 615 | udelay(chip->chip_delay); |
12efdde3 TG |
616 | chip->cmd_ctrl(mtd, NAND_CMD_STATUS, |
617 | NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE); | |
618 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, | |
619 | NAND_NCE | NAND_CTRL_CHANGE); | |
ace4dfee | 620 | while (!(chip->read_byte(mtd) & NAND_STATUS_READY)) ; |
1da177e4 LT |
621 | return; |
622 | ||
7bc3312b TG |
623 | case NAND_CMD_RNDOUT: |
624 | /* No ready / busy check necessary */ | |
625 | chip->cmd_ctrl(mtd, NAND_CMD_RNDOUTSTART, | |
626 | NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE); | |
627 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, | |
628 | NAND_NCE | NAND_CTRL_CHANGE); | |
629 | return; | |
630 | ||
1da177e4 | 631 | case NAND_CMD_READ0: |
12efdde3 TG |
632 | chip->cmd_ctrl(mtd, NAND_CMD_READSTART, |
633 | NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE); | |
634 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, | |
635 | NAND_NCE | NAND_CTRL_CHANGE); | |
61b03bd7 | 636 | |
e0c7d767 | 637 | /* This applies to read commands */ |
1da177e4 | 638 | default: |
61b03bd7 | 639 | /* |
1da177e4 LT |
640 | * If we don't have access to the busy pin, we apply the given |
641 | * command delay | |
e0c7d767 | 642 | */ |
ace4dfee TG |
643 | if (!chip->dev_ready) { |
644 | udelay(chip->chip_delay); | |
1da177e4 | 645 | return; |
61b03bd7 | 646 | } |
1da177e4 | 647 | } |
3b88775c | 648 | |
1da177e4 LT |
649 | /* Apply this short delay always to ensure that we do wait tWB in |
650 | * any case on any machine. */ | |
e0c7d767 | 651 | ndelay(100); |
3b88775c TG |
652 | |
653 | nand_wait_ready(mtd); | |
1da177e4 LT |
654 | } |
655 | ||
656 | /** | |
657 | * nand_get_device - [GENERIC] Get chip for selected access | |
844d3b42 | 658 | * @chip: the nand chip descriptor |
1da177e4 | 659 | * @mtd: MTD device structure |
61b03bd7 | 660 | * @new_state: the state which is requested |
1da177e4 LT |
661 | * |
662 | * Get the device and lock it for exclusive access | |
663 | */ | |
2c0a2bed | 664 | static int |
ace4dfee | 665 | nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state) |
1da177e4 | 666 | { |
ace4dfee TG |
667 | spinlock_t *lock = &chip->controller->lock; |
668 | wait_queue_head_t *wq = &chip->controller->wq; | |
e0c7d767 | 669 | DECLARE_WAITQUEUE(wait, current); |
e0c7d767 | 670 | retry: |
0dfc6246 TG |
671 | spin_lock(lock); |
672 | ||
1da177e4 | 673 | /* Hardware controller shared among independend devices */ |
a36ed299 | 674 | /* Hardware controller shared among independend devices */ |
ace4dfee TG |
675 | if (!chip->controller->active) |
676 | chip->controller->active = chip; | |
a36ed299 | 677 | |
ace4dfee TG |
678 | if (chip->controller->active == chip && chip->state == FL_READY) { |
679 | chip->state = new_state; | |
0dfc6246 | 680 | spin_unlock(lock); |
962034f4 VW |
681 | return 0; |
682 | } | |
683 | if (new_state == FL_PM_SUSPENDED) { | |
684 | spin_unlock(lock); | |
ace4dfee | 685 | return (chip->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN; |
0dfc6246 TG |
686 | } |
687 | set_current_state(TASK_UNINTERRUPTIBLE); | |
688 | add_wait_queue(wq, &wait); | |
689 | spin_unlock(lock); | |
690 | schedule(); | |
691 | remove_wait_queue(wq, &wait); | |
1da177e4 LT |
692 | goto retry; |
693 | } | |
694 | ||
695 | /** | |
696 | * nand_wait - [DEFAULT] wait until the command is done | |
697 | * @mtd: MTD device structure | |
844d3b42 | 698 | * @chip: NAND chip structure |
1da177e4 LT |
699 | * |
700 | * Wait for command done. This applies to erase and program only | |
61b03bd7 | 701 | * Erase can take up to 400ms and program up to 20ms according to |
1da177e4 | 702 | * general NAND and SmartMedia specs |
844d3b42 | 703 | */ |
7bc3312b | 704 | static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip) |
1da177e4 LT |
705 | { |
706 | ||
e0c7d767 | 707 | unsigned long timeo = jiffies; |
7bc3312b | 708 | int status, state = chip->state; |
61b03bd7 | 709 | |
1da177e4 | 710 | if (state == FL_ERASING) |
e0c7d767 | 711 | timeo += (HZ * 400) / 1000; |
1da177e4 | 712 | else |
e0c7d767 | 713 | timeo += (HZ * 20) / 1000; |
1da177e4 | 714 | |
8fe833c1 RP |
715 | led_trigger_event(nand_led_trigger, LED_FULL); |
716 | ||
1da177e4 LT |
717 | /* Apply this short delay always to ensure that we do wait tWB in |
718 | * any case on any machine. */ | |
e0c7d767 | 719 | ndelay(100); |
1da177e4 | 720 | |
ace4dfee TG |
721 | if ((state == FL_ERASING) && (chip->options & NAND_IS_AND)) |
722 | chip->cmdfunc(mtd, NAND_CMD_STATUS_MULTI, -1, -1); | |
61b03bd7 | 723 | else |
ace4dfee | 724 | chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); |
1da177e4 | 725 | |
61b03bd7 | 726 | while (time_before(jiffies, timeo)) { |
ace4dfee TG |
727 | if (chip->dev_ready) { |
728 | if (chip->dev_ready(mtd)) | |
61b03bd7 | 729 | break; |
1da177e4 | 730 | } else { |
ace4dfee | 731 | if (chip->read_byte(mtd) & NAND_STATUS_READY) |
1da177e4 LT |
732 | break; |
733 | } | |
20a6c211 | 734 | cond_resched(); |
1da177e4 | 735 | } |
8fe833c1 RP |
736 | led_trigger_event(nand_led_trigger, LED_OFF); |
737 | ||
ace4dfee | 738 | status = (int)chip->read_byte(mtd); |
1da177e4 LT |
739 | return status; |
740 | } | |
741 | ||
8593fbc6 TG |
742 | /** |
743 | * nand_read_page_raw - [Intern] read raw page data without ecc | |
744 | * @mtd: mtd info structure | |
745 | * @chip: nand chip info structure | |
746 | * @buf: buffer to store read data | |
747 | */ | |
748 | static int nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip, | |
749 | uint8_t *buf) | |
750 | { | |
751 | chip->read_buf(mtd, buf, mtd->writesize); | |
752 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); | |
753 | return 0; | |
754 | } | |
755 | ||
1da177e4 | 756 | /** |
f5bbdacc TG |
757 | * nand_read_page_swecc - {REPLACABLE] software ecc based page read function |
758 | * @mtd: mtd info structure | |
759 | * @chip: nand chip info structure | |
760 | * @buf: buffer to store read data | |
068e3c0a | 761 | */ |
f5bbdacc TG |
762 | static int nand_read_page_swecc(struct mtd_info *mtd, struct nand_chip *chip, |
763 | uint8_t *buf) | |
1da177e4 | 764 | { |
f5bbdacc TG |
765 | int i, eccsize = chip->ecc.size; |
766 | int eccbytes = chip->ecc.bytes; | |
767 | int eccsteps = chip->ecc.steps; | |
768 | uint8_t *p = buf; | |
f75e5097 TG |
769 | uint8_t *ecc_calc = chip->buffers.ecccalc; |
770 | uint8_t *ecc_code = chip->buffers.ecccode; | |
5bd34c09 | 771 | int *eccpos = chip->ecc.layout->eccpos; |
f5bbdacc | 772 | |
8593fbc6 | 773 | nand_read_page_raw(mtd, chip, buf); |
f5bbdacc TG |
774 | |
775 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) | |
776 | chip->ecc.calculate(mtd, p, &ecc_calc[i]); | |
777 | ||
778 | for (i = 0; i < chip->ecc.total; i++) | |
f75e5097 | 779 | ecc_code[i] = chip->oob_poi[eccpos[i]]; |
f5bbdacc TG |
780 | |
781 | eccsteps = chip->ecc.steps; | |
782 | p = buf; | |
783 | ||
784 | for (i = 0 ; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { | |
785 | int stat; | |
786 | ||
787 | stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]); | |
788 | if (stat == -1) | |
789 | mtd->ecc_stats.failed++; | |
790 | else | |
791 | mtd->ecc_stats.corrected += stat; | |
792 | } | |
793 | return 0; | |
22c60f5f | 794 | } |
1da177e4 | 795 | |
068e3c0a | 796 | /** |
f5bbdacc TG |
797 | * nand_read_page_hwecc - {REPLACABLE] hardware ecc based page read function |
798 | * @mtd: mtd info structure | |
799 | * @chip: nand chip info structure | |
800 | * @buf: buffer to store read data | |
068e3c0a | 801 | * |
f5bbdacc | 802 | * Not for syndrome calculating ecc controllers which need a special oob layout |
068e3c0a | 803 | */ |
f5bbdacc TG |
804 | static int nand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, |
805 | uint8_t *buf) | |
1da177e4 | 806 | { |
f5bbdacc TG |
807 | int i, eccsize = chip->ecc.size; |
808 | int eccbytes = chip->ecc.bytes; | |
809 | int eccsteps = chip->ecc.steps; | |
810 | uint8_t *p = buf; | |
f75e5097 TG |
811 | uint8_t *ecc_calc = chip->buffers.ecccalc; |
812 | uint8_t *ecc_code = chip->buffers.ecccode; | |
5bd34c09 | 813 | int *eccpos = chip->ecc.layout->eccpos; |
f5bbdacc TG |
814 | |
815 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { | |
816 | chip->ecc.hwctl(mtd, NAND_ECC_READ); | |
817 | chip->read_buf(mtd, p, eccsize); | |
818 | chip->ecc.calculate(mtd, p, &ecc_calc[i]); | |
1da177e4 | 819 | } |
f75e5097 | 820 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); |
1da177e4 | 821 | |
f5bbdacc | 822 | for (i = 0; i < chip->ecc.total; i++) |
f75e5097 | 823 | ecc_code[i] = chip->oob_poi[eccpos[i]]; |
1da177e4 | 824 | |
f5bbdacc TG |
825 | eccsteps = chip->ecc.steps; |
826 | p = buf; | |
61b03bd7 | 827 | |
f5bbdacc TG |
828 | for (i = 0 ; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { |
829 | int stat; | |
1da177e4 | 830 | |
f5bbdacc TG |
831 | stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]); |
832 | if (stat == -1) | |
833 | mtd->ecc_stats.failed++; | |
834 | else | |
835 | mtd->ecc_stats.corrected += stat; | |
836 | } | |
837 | return 0; | |
838 | } | |
1da177e4 | 839 | |
f5bbdacc TG |
840 | /** |
841 | * nand_read_page_syndrome - {REPLACABLE] hardware ecc syndrom based page read | |
842 | * @mtd: mtd info structure | |
843 | * @chip: nand chip info structure | |
844 | * @buf: buffer to store read data | |
845 | * | |
846 | * The hw generator calculates the error syndrome automatically. Therefor | |
f75e5097 | 847 | * we need a special oob layout and handling. |
f5bbdacc TG |
848 | */ |
849 | static int nand_read_page_syndrome(struct mtd_info *mtd, struct nand_chip *chip, | |
850 | uint8_t *buf) | |
851 | { | |
852 | int i, eccsize = chip->ecc.size; | |
853 | int eccbytes = chip->ecc.bytes; | |
854 | int eccsteps = chip->ecc.steps; | |
855 | uint8_t *p = buf; | |
f75e5097 | 856 | uint8_t *oob = chip->oob_poi; |
1da177e4 | 857 | |
f5bbdacc TG |
858 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { |
859 | int stat; | |
61b03bd7 | 860 | |
f5bbdacc TG |
861 | chip->ecc.hwctl(mtd, NAND_ECC_READ); |
862 | chip->read_buf(mtd, p, eccsize); | |
1da177e4 | 863 | |
f5bbdacc TG |
864 | if (chip->ecc.prepad) { |
865 | chip->read_buf(mtd, oob, chip->ecc.prepad); | |
866 | oob += chip->ecc.prepad; | |
867 | } | |
1da177e4 | 868 | |
f5bbdacc TG |
869 | chip->ecc.hwctl(mtd, NAND_ECC_READSYN); |
870 | chip->read_buf(mtd, oob, eccbytes); | |
871 | stat = chip->ecc.correct(mtd, p, oob, NULL); | |
61b03bd7 | 872 | |
f5bbdacc TG |
873 | if (stat == -1) |
874 | mtd->ecc_stats.failed++; | |
61b03bd7 | 875 | else |
f5bbdacc | 876 | mtd->ecc_stats.corrected += stat; |
61b03bd7 | 877 | |
f5bbdacc | 878 | oob += eccbytes; |
1da177e4 | 879 | |
f5bbdacc TG |
880 | if (chip->ecc.postpad) { |
881 | chip->read_buf(mtd, oob, chip->ecc.postpad); | |
882 | oob += chip->ecc.postpad; | |
61b03bd7 | 883 | } |
f5bbdacc | 884 | } |
1da177e4 | 885 | |
f5bbdacc | 886 | /* Calculate remaining oob bytes */ |
7e4178f9 | 887 | i = mtd->oobsize - (oob - chip->oob_poi); |
f5bbdacc TG |
888 | if (i) |
889 | chip->read_buf(mtd, oob, i); | |
61b03bd7 | 890 | |
f5bbdacc TG |
891 | return 0; |
892 | } | |
1da177e4 | 893 | |
f5bbdacc | 894 | /** |
8593fbc6 TG |
895 | * nand_transfer_oob - [Internal] Transfer oob to client buffer |
896 | * @chip: nand chip structure | |
844d3b42 | 897 | * @oob: oob destination address |
8593fbc6 TG |
898 | * @ops: oob ops structure |
899 | */ | |
900 | static uint8_t *nand_transfer_oob(struct nand_chip *chip, uint8_t *oob, | |
901 | struct mtd_oob_ops *ops) | |
902 | { | |
903 | size_t len = ops->ooblen; | |
904 | ||
905 | switch(ops->mode) { | |
906 | ||
907 | case MTD_OOB_PLACE: | |
908 | case MTD_OOB_RAW: | |
909 | memcpy(oob, chip->oob_poi + ops->ooboffs, len); | |
910 | return oob + len; | |
911 | ||
912 | case MTD_OOB_AUTO: { | |
913 | struct nand_oobfree *free = chip->ecc.layout->oobfree; | |
7bc3312b TG |
914 | uint32_t boffs = 0, roffs = ops->ooboffs; |
915 | size_t bytes = 0; | |
8593fbc6 TG |
916 | |
917 | for(; free->length && len; free++, len -= bytes) { | |
7bc3312b TG |
918 | /* Read request not from offset 0 ? */ |
919 | if (unlikely(roffs)) { | |
920 | if (roffs >= free->length) { | |
921 | roffs -= free->length; | |
922 | continue; | |
923 | } | |
924 | boffs = free->offset + roffs; | |
925 | bytes = min_t(size_t, len, | |
926 | (free->length - roffs)); | |
927 | roffs = 0; | |
928 | } else { | |
929 | bytes = min_t(size_t, len, free->length); | |
930 | boffs = free->offset; | |
931 | } | |
932 | memcpy(oob, chip->oob_poi + boffs, bytes); | |
8593fbc6 TG |
933 | oob += bytes; |
934 | } | |
935 | return oob; | |
936 | } | |
937 | default: | |
938 | BUG(); | |
939 | } | |
940 | return NULL; | |
941 | } | |
942 | ||
943 | /** | |
944 | * nand_do_read_ops - [Internal] Read data with ECC | |
f5bbdacc TG |
945 | * |
946 | * @mtd: MTD device structure | |
947 | * @from: offset to read from | |
844d3b42 | 948 | * @ops: oob ops structure |
f5bbdacc TG |
949 | * |
950 | * Internal function. Called with chip held. | |
951 | */ | |
8593fbc6 TG |
952 | static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, |
953 | struct mtd_oob_ops *ops) | |
f5bbdacc TG |
954 | { |
955 | int chipnr, page, realpage, col, bytes, aligned; | |
956 | struct nand_chip *chip = mtd->priv; | |
957 | struct mtd_ecc_stats stats; | |
958 | int blkcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1; | |
959 | int sndcmd = 1; | |
960 | int ret = 0; | |
8593fbc6 TG |
961 | uint32_t readlen = ops->len; |
962 | uint8_t *bufpoi, *oob, *buf; | |
1da177e4 | 963 | |
f5bbdacc | 964 | stats = mtd->ecc_stats; |
1da177e4 | 965 | |
f5bbdacc TG |
966 | chipnr = (int)(from >> chip->chip_shift); |
967 | chip->select_chip(mtd, chipnr); | |
61b03bd7 | 968 | |
f5bbdacc TG |
969 | realpage = (int)(from >> chip->page_shift); |
970 | page = realpage & chip->pagemask; | |
1da177e4 | 971 | |
f5bbdacc | 972 | col = (int)(from & (mtd->writesize - 1)); |
f75e5097 | 973 | chip->oob_poi = chip->buffers.oobrbuf; |
61b03bd7 | 974 | |
8593fbc6 TG |
975 | buf = ops->datbuf; |
976 | oob = ops->oobbuf; | |
977 | ||
f5bbdacc TG |
978 | while(1) { |
979 | bytes = min(mtd->writesize - col, readlen); | |
980 | aligned = (bytes == mtd->writesize); | |
61b03bd7 | 981 | |
f5bbdacc | 982 | /* Is the current page in the buffer ? */ |
8593fbc6 | 983 | if (realpage != chip->pagebuf || oob) { |
f75e5097 | 984 | bufpoi = aligned ? buf : chip->buffers.databuf; |
61b03bd7 | 985 | |
f5bbdacc TG |
986 | if (likely(sndcmd)) { |
987 | chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page); | |
988 | sndcmd = 0; | |
1da177e4 | 989 | } |
1da177e4 | 990 | |
f5bbdacc TG |
991 | /* Now read the page into the buffer */ |
992 | ret = chip->ecc.read_page(mtd, chip, bufpoi); | |
993 | if (ret < 0) | |
1da177e4 | 994 | break; |
f5bbdacc TG |
995 | |
996 | /* Transfer not aligned data */ | |
997 | if (!aligned) { | |
998 | chip->pagebuf = realpage; | |
f75e5097 | 999 | memcpy(buf, chip->buffers.databuf + col, bytes); |
f5bbdacc TG |
1000 | } |
1001 | ||
8593fbc6 TG |
1002 | buf += bytes; |
1003 | ||
1004 | if (unlikely(oob)) { | |
1005 | /* Raw mode does data:oob:data:oob */ | |
1006 | if (ops->mode != MTD_OOB_RAW) | |
1007 | oob = nand_transfer_oob(chip, oob, ops); | |
1008 | else | |
1009 | buf = nand_transfer_oob(chip, buf, ops); | |
1010 | } | |
1011 | ||
f5bbdacc TG |
1012 | if (!(chip->options & NAND_NO_READRDY)) { |
1013 | /* | |
1014 | * Apply delay or wait for ready/busy pin. Do | |
1015 | * this before the AUTOINCR check, so no | |
1016 | * problems arise if a chip which does auto | |
1017 | * increment is marked as NOAUTOINCR by the | |
1018 | * board driver. | |
1019 | */ | |
1020 | if (!chip->dev_ready) | |
1021 | udelay(chip->chip_delay); | |
1022 | else | |
1023 | nand_wait_ready(mtd); | |
1da177e4 | 1024 | } |
8593fbc6 | 1025 | } else { |
f75e5097 | 1026 | memcpy(buf, chip->buffers.databuf + col, bytes); |
8593fbc6 TG |
1027 | buf += bytes; |
1028 | } | |
1da177e4 | 1029 | |
f5bbdacc | 1030 | readlen -= bytes; |
61b03bd7 | 1031 | |
f5bbdacc | 1032 | if (!readlen) |
61b03bd7 | 1033 | break; |
1da177e4 LT |
1034 | |
1035 | /* For subsequent reads align to page boundary. */ | |
1036 | col = 0; | |
1037 | /* Increment page address */ | |
1038 | realpage++; | |
1039 | ||
ace4dfee | 1040 | page = realpage & chip->pagemask; |
1da177e4 LT |
1041 | /* Check, if we cross a chip boundary */ |
1042 | if (!page) { | |
1043 | chipnr++; | |
ace4dfee TG |
1044 | chip->select_chip(mtd, -1); |
1045 | chip->select_chip(mtd, chipnr); | |
1da177e4 | 1046 | } |
f5bbdacc | 1047 | |
61b03bd7 TG |
1048 | /* Check, if the chip supports auto page increment |
1049 | * or if we have hit a block boundary. | |
e0c7d767 | 1050 | */ |
f5bbdacc | 1051 | if (!NAND_CANAUTOINCR(chip) || !(page & blkcheck)) |
61b03bd7 | 1052 | sndcmd = 1; |
1da177e4 LT |
1053 | } |
1054 | ||
8593fbc6 | 1055 | ops->retlen = ops->len - (size_t) readlen; |
1da177e4 | 1056 | |
f5bbdacc TG |
1057 | if (ret) |
1058 | return ret; | |
1059 | ||
9a1fcdfd TG |
1060 | if (mtd->ecc_stats.failed - stats.failed) |
1061 | return -EBADMSG; | |
1062 | ||
1063 | return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0; | |
f5bbdacc TG |
1064 | } |
1065 | ||
1066 | /** | |
1067 | * nand_read - [MTD Interface] MTD compability function for nand_do_read_ecc | |
1068 | * @mtd: MTD device structure | |
1069 | * @from: offset to read from | |
1070 | * @len: number of bytes to read | |
1071 | * @retlen: pointer to variable to store the number of read bytes | |
1072 | * @buf: the databuffer to put data | |
1073 | * | |
1074 | * Get hold of the chip and call nand_do_read | |
1075 | */ | |
1076 | static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, | |
1077 | size_t *retlen, uint8_t *buf) | |
1078 | { | |
8593fbc6 | 1079 | struct nand_chip *chip = mtd->priv; |
f5bbdacc TG |
1080 | int ret; |
1081 | ||
f5bbdacc TG |
1082 | /* Do not allow reads past end of device */ |
1083 | if ((from + len) > mtd->size) | |
1084 | return -EINVAL; | |
1085 | if (!len) | |
1086 | return 0; | |
1087 | ||
8593fbc6 | 1088 | nand_get_device(chip, mtd, FL_READING); |
f5bbdacc | 1089 | |
8593fbc6 TG |
1090 | chip->ops.len = len; |
1091 | chip->ops.datbuf = buf; | |
1092 | chip->ops.oobbuf = NULL; | |
1093 | ||
1094 | ret = nand_do_read_ops(mtd, from, &chip->ops); | |
f5bbdacc | 1095 | |
7fd5aecc RP |
1096 | *retlen = chip->ops.retlen; |
1097 | ||
f5bbdacc TG |
1098 | nand_release_device(mtd); |
1099 | ||
1100 | return ret; | |
1da177e4 LT |
1101 | } |
1102 | ||
7bc3312b TG |
1103 | /** |
1104 | * nand_read_oob_std - [REPLACABLE] the most common OOB data read function | |
1105 | * @mtd: mtd info structure | |
1106 | * @chip: nand chip info structure | |
1107 | * @page: page number to read | |
1108 | * @sndcmd: flag whether to issue read command or not | |
1109 | */ | |
1110 | static int nand_read_oob_std(struct mtd_info *mtd, struct nand_chip *chip, | |
1111 | int page, int sndcmd) | |
1112 | { | |
1113 | if (sndcmd) { | |
1114 | chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page); | |
1115 | sndcmd = 0; | |
1116 | } | |
1117 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); | |
1118 | return sndcmd; | |
1119 | } | |
1120 | ||
1121 | /** | |
1122 | * nand_read_oob_syndrome - [REPLACABLE] OOB data read function for HW ECC | |
1123 | * with syndromes | |
1124 | * @mtd: mtd info structure | |
1125 | * @chip: nand chip info structure | |
1126 | * @page: page number to read | |
1127 | * @sndcmd: flag whether to issue read command or not | |
1128 | */ | |
1129 | static int nand_read_oob_syndrome(struct mtd_info *mtd, struct nand_chip *chip, | |
1130 | int page, int sndcmd) | |
1131 | { | |
1132 | uint8_t *buf = chip->oob_poi; | |
1133 | int length = mtd->oobsize; | |
1134 | int chunk = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad; | |
1135 | int eccsize = chip->ecc.size; | |
1136 | uint8_t *bufpoi = buf; | |
1137 | int i, toread, sndrnd = 0, pos; | |
1138 | ||
1139 | chip->cmdfunc(mtd, NAND_CMD_READ0, chip->ecc.size, page); | |
1140 | for (i = 0; i < chip->ecc.steps; i++) { | |
1141 | if (sndrnd) { | |
1142 | pos = eccsize + i * (eccsize + chunk); | |
1143 | if (mtd->writesize > 512) | |
1144 | chip->cmdfunc(mtd, NAND_CMD_RNDOUT, pos, -1); | |
1145 | else | |
1146 | chip->cmdfunc(mtd, NAND_CMD_READ0, pos, page); | |
1147 | } else | |
1148 | sndrnd = 1; | |
1149 | toread = min_t(int, length, chunk); | |
1150 | chip->read_buf(mtd, bufpoi, toread); | |
1151 | bufpoi += toread; | |
1152 | length -= toread; | |
1153 | } | |
1154 | if (length > 0) | |
1155 | chip->read_buf(mtd, bufpoi, length); | |
1156 | ||
1157 | return 1; | |
1158 | } | |
1159 | ||
1160 | /** | |
1161 | * nand_write_oob_std - [REPLACABLE] the most common OOB data write function | |
1162 | * @mtd: mtd info structure | |
1163 | * @chip: nand chip info structure | |
1164 | * @page: page number to write | |
1165 | */ | |
1166 | static int nand_write_oob_std(struct mtd_info *mtd, struct nand_chip *chip, | |
1167 | int page) | |
1168 | { | |
1169 | int status = 0; | |
1170 | const uint8_t *buf = chip->oob_poi; | |
1171 | int length = mtd->oobsize; | |
1172 | ||
1173 | chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page); | |
1174 | chip->write_buf(mtd, buf, length); | |
1175 | /* Send command to program the OOB data */ | |
1176 | chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); | |
1177 | ||
1178 | status = chip->waitfunc(mtd, chip); | |
1179 | ||
0d420f9d | 1180 | return status & NAND_STATUS_FAIL ? -EIO : 0; |
7bc3312b TG |
1181 | } |
1182 | ||
1183 | /** | |
1184 | * nand_write_oob_syndrome - [REPLACABLE] OOB data write function for HW ECC | |
1185 | * with syndrome - only for large page flash ! | |
1186 | * @mtd: mtd info structure | |
1187 | * @chip: nand chip info structure | |
1188 | * @page: page number to write | |
1189 | */ | |
1190 | static int nand_write_oob_syndrome(struct mtd_info *mtd, | |
1191 | struct nand_chip *chip, int page) | |
1192 | { | |
1193 | int chunk = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad; | |
1194 | int eccsize = chip->ecc.size, length = mtd->oobsize; | |
1195 | int i, len, pos, status = 0, sndcmd = 0, steps = chip->ecc.steps; | |
1196 | const uint8_t *bufpoi = chip->oob_poi; | |
1197 | ||
1198 | /* | |
1199 | * data-ecc-data-ecc ... ecc-oob | |
1200 | * or | |
1201 | * data-pad-ecc-pad-data-pad .... ecc-pad-oob | |
1202 | */ | |
1203 | if (!chip->ecc.prepad && !chip->ecc.postpad) { | |
1204 | pos = steps * (eccsize + chunk); | |
1205 | steps = 0; | |
1206 | } else | |
8b0036ee | 1207 | pos = eccsize; |
7bc3312b TG |
1208 | |
1209 | chip->cmdfunc(mtd, NAND_CMD_SEQIN, pos, page); | |
1210 | for (i = 0; i < steps; i++) { | |
1211 | if (sndcmd) { | |
1212 | if (mtd->writesize <= 512) { | |
1213 | uint32_t fill = 0xFFFFFFFF; | |
1214 | ||
1215 | len = eccsize; | |
1216 | while (len > 0) { | |
1217 | int num = min_t(int, len, 4); | |
1218 | chip->write_buf(mtd, (uint8_t *)&fill, | |
1219 | num); | |
1220 | len -= num; | |
1221 | } | |
1222 | } else { | |
1223 | pos = eccsize + i * (eccsize + chunk); | |
1224 | chip->cmdfunc(mtd, NAND_CMD_RNDIN, pos, -1); | |
1225 | } | |
1226 | } else | |
1227 | sndcmd = 1; | |
1228 | len = min_t(int, length, chunk); | |
1229 | chip->write_buf(mtd, bufpoi, len); | |
1230 | bufpoi += len; | |
1231 | length -= len; | |
1232 | } | |
1233 | if (length > 0) | |
1234 | chip->write_buf(mtd, bufpoi, length); | |
1235 | ||
1236 | chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); | |
1237 | status = chip->waitfunc(mtd, chip); | |
1238 | ||
1239 | return status & NAND_STATUS_FAIL ? -EIO : 0; | |
1240 | } | |
1241 | ||
1da177e4 | 1242 | /** |
8593fbc6 | 1243 | * nand_do_read_oob - [Intern] NAND read out-of-band |
1da177e4 LT |
1244 | * @mtd: MTD device structure |
1245 | * @from: offset to read from | |
8593fbc6 | 1246 | * @ops: oob operations description structure |
1da177e4 LT |
1247 | * |
1248 | * NAND read out-of-band data from the spare area | |
1249 | */ | |
8593fbc6 TG |
1250 | static int nand_do_read_oob(struct mtd_info *mtd, loff_t from, |
1251 | struct mtd_oob_ops *ops) | |
1da177e4 | 1252 | { |
7bc3312b | 1253 | int page, realpage, chipnr, sndcmd = 1; |
ace4dfee | 1254 | struct nand_chip *chip = mtd->priv; |
7314e9e7 | 1255 | int blkcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1; |
7bc3312b TG |
1256 | int readlen = ops->len; |
1257 | uint8_t *buf = ops->oobbuf; | |
61b03bd7 | 1258 | |
7e9a0bb0 AM |
1259 | DEBUG(MTD_DEBUG_LEVEL3, "nand_read_oob: from = 0x%08Lx, len = %i\n", |
1260 | (unsigned long long)from, readlen); | |
1da177e4 | 1261 | |
7314e9e7 | 1262 | chipnr = (int)(from >> chip->chip_shift); |
ace4dfee | 1263 | chip->select_chip(mtd, chipnr); |
1da177e4 | 1264 | |
7314e9e7 TG |
1265 | /* Shift to get page */ |
1266 | realpage = (int)(from >> chip->page_shift); | |
1267 | page = realpage & chip->pagemask; | |
1da177e4 | 1268 | |
7bc3312b | 1269 | chip->oob_poi = chip->buffers.oobrbuf; |
7314e9e7 TG |
1270 | |
1271 | while(1) { | |
7bc3312b TG |
1272 | sndcmd = chip->ecc.read_oob(mtd, chip, page, sndcmd); |
1273 | buf = nand_transfer_oob(chip, buf, ops); | |
8593fbc6 | 1274 | |
7314e9e7 TG |
1275 | if (!(chip->options & NAND_NO_READRDY)) { |
1276 | /* | |
1277 | * Apply delay or wait for ready/busy pin. Do this | |
1278 | * before the AUTOINCR check, so no problems arise if a | |
1279 | * chip which does auto increment is marked as | |
1280 | * NOAUTOINCR by the board driver. | |
19870da7 | 1281 | */ |
ace4dfee TG |
1282 | if (!chip->dev_ready) |
1283 | udelay(chip->chip_delay); | |
19870da7 TG |
1284 | else |
1285 | nand_wait_ready(mtd); | |
7314e9e7 | 1286 | } |
19870da7 | 1287 | |
0d420f9d SZ |
1288 | readlen -= ops->ooblen; |
1289 | if (!readlen) | |
1290 | break; | |
1291 | ||
7314e9e7 TG |
1292 | /* Increment page address */ |
1293 | realpage++; | |
1294 | ||
1295 | page = realpage & chip->pagemask; | |
1296 | /* Check, if we cross a chip boundary */ | |
1297 | if (!page) { | |
1298 | chipnr++; | |
1299 | chip->select_chip(mtd, -1); | |
1300 | chip->select_chip(mtd, chipnr); | |
1da177e4 | 1301 | } |
7314e9e7 TG |
1302 | |
1303 | /* Check, if the chip supports auto page increment | |
1304 | * or if we have hit a block boundary. | |
1305 | */ | |
1306 | if (!NAND_CANAUTOINCR(chip) || !(page & blkcheck)) | |
1307 | sndcmd = 1; | |
1da177e4 LT |
1308 | } |
1309 | ||
8593fbc6 | 1310 | ops->retlen = ops->len; |
1da177e4 LT |
1311 | return 0; |
1312 | } | |
1313 | ||
1314 | /** | |
8593fbc6 | 1315 | * nand_read_oob - [MTD Interface] NAND read data and/or out-of-band |
1da177e4 | 1316 | * @mtd: MTD device structure |
1da177e4 | 1317 | * @from: offset to read from |
8593fbc6 | 1318 | * @ops: oob operation description structure |
1da177e4 | 1319 | * |
8593fbc6 | 1320 | * NAND read data and/or out-of-band data |
1da177e4 | 1321 | */ |
8593fbc6 TG |
1322 | static int nand_read_oob(struct mtd_info *mtd, loff_t from, |
1323 | struct mtd_oob_ops *ops) | |
1da177e4 | 1324 | { |
8593fbc6 TG |
1325 | int (*read_page)(struct mtd_info *mtd, struct nand_chip *chip, |
1326 | uint8_t *buf) = NULL; | |
ace4dfee | 1327 | struct nand_chip *chip = mtd->priv; |
8593fbc6 TG |
1328 | int ret = -ENOTSUPP; |
1329 | ||
1330 | ops->retlen = 0; | |
1da177e4 LT |
1331 | |
1332 | /* Do not allow reads past end of device */ | |
8593fbc6 TG |
1333 | if ((from + ops->len) > mtd->size) { |
1334 | DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: " | |
ace4dfee | 1335 | "Attempt read beyond end of device\n"); |
1da177e4 LT |
1336 | return -EINVAL; |
1337 | } | |
1338 | ||
ace4dfee | 1339 | nand_get_device(chip, mtd, FL_READING); |
1da177e4 | 1340 | |
8593fbc6 TG |
1341 | switch(ops->mode) { |
1342 | case MTD_OOB_PLACE: | |
1343 | case MTD_OOB_AUTO: | |
1344 | break; | |
61b03bd7 | 1345 | |
8593fbc6 TG |
1346 | case MTD_OOB_RAW: |
1347 | /* Replace the read_page algorithm temporary */ | |
1348 | read_page = chip->ecc.read_page; | |
1349 | chip->ecc.read_page = nand_read_page_raw; | |
1350 | break; | |
1da177e4 | 1351 | |
8593fbc6 TG |
1352 | default: |
1353 | goto out; | |
1354 | } | |
1da177e4 | 1355 | |
8593fbc6 TG |
1356 | if (!ops->datbuf) |
1357 | ret = nand_do_read_oob(mtd, from, ops); | |
1358 | else | |
1359 | ret = nand_do_read_ops(mtd, from, ops); | |
61b03bd7 | 1360 | |
8593fbc6 TG |
1361 | if (unlikely(ops->mode == MTD_OOB_RAW)) |
1362 | chip->ecc.read_page = read_page; | |
1363 | out: | |
1364 | nand_release_device(mtd); | |
1365 | return ret; | |
1366 | } | |
61b03bd7 | 1367 | |
1da177e4 | 1368 | |
8593fbc6 TG |
1369 | /** |
1370 | * nand_write_page_raw - [Intern] raw page write function | |
1371 | * @mtd: mtd info structure | |
1372 | * @chip: nand chip info structure | |
1373 | * @buf: data buffer | |
1374 | */ | |
1375 | static void nand_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip, | |
1376 | const uint8_t *buf) | |
1377 | { | |
1378 | chip->write_buf(mtd, buf, mtd->writesize); | |
1379 | chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); | |
1da177e4 LT |
1380 | } |
1381 | ||
9223a456 | 1382 | /** |
f75e5097 TG |
1383 | * nand_write_page_swecc - {REPLACABLE] software ecc based page write function |
1384 | * @mtd: mtd info structure | |
1385 | * @chip: nand chip info structure | |
1386 | * @buf: data buffer | |
9223a456 | 1387 | */ |
f75e5097 TG |
1388 | static void nand_write_page_swecc(struct mtd_info *mtd, struct nand_chip *chip, |
1389 | const uint8_t *buf) | |
9223a456 | 1390 | { |
f75e5097 TG |
1391 | int i, eccsize = chip->ecc.size; |
1392 | int eccbytes = chip->ecc.bytes; | |
1393 | int eccsteps = chip->ecc.steps; | |
1394 | uint8_t *ecc_calc = chip->buffers.ecccalc; | |
1395 | const uint8_t *p = buf; | |
5bd34c09 | 1396 | int *eccpos = chip->ecc.layout->eccpos; |
9223a456 | 1397 | |
8593fbc6 TG |
1398 | /* Software ecc calculation */ |
1399 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) | |
1400 | chip->ecc.calculate(mtd, p, &ecc_calc[i]); | |
9223a456 | 1401 | |
8593fbc6 TG |
1402 | for (i = 0; i < chip->ecc.total; i++) |
1403 | chip->oob_poi[eccpos[i]] = ecc_calc[i]; | |
9223a456 | 1404 | |
8593fbc6 | 1405 | nand_write_page_raw(mtd, chip, buf); |
f75e5097 | 1406 | } |
9223a456 | 1407 | |
f75e5097 TG |
1408 | /** |
1409 | * nand_write_page_hwecc - {REPLACABLE] hardware ecc based page write function | |
1410 | * @mtd: mtd info structure | |
1411 | * @chip: nand chip info structure | |
1412 | * @buf: data buffer | |
1413 | */ | |
1414 | static void nand_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, | |
1415 | const uint8_t *buf) | |
1416 | { | |
1417 | int i, eccsize = chip->ecc.size; | |
1418 | int eccbytes = chip->ecc.bytes; | |
1419 | int eccsteps = chip->ecc.steps; | |
1420 | uint8_t *ecc_calc = chip->buffers.ecccalc; | |
1421 | const uint8_t *p = buf; | |
5bd34c09 | 1422 | int *eccpos = chip->ecc.layout->eccpos; |
9223a456 | 1423 | |
f75e5097 TG |
1424 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { |
1425 | chip->ecc.hwctl(mtd, NAND_ECC_WRITE); | |
29da9cea | 1426 | chip->write_buf(mtd, p, eccsize); |
f75e5097 | 1427 | chip->ecc.calculate(mtd, p, &ecc_calc[i]); |
9223a456 TG |
1428 | } |
1429 | ||
f75e5097 TG |
1430 | for (i = 0; i < chip->ecc.total; i++) |
1431 | chip->oob_poi[eccpos[i]] = ecc_calc[i]; | |
1432 | ||
1433 | chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); | |
9223a456 TG |
1434 | } |
1435 | ||
61b03bd7 | 1436 | /** |
f75e5097 TG |
1437 | * nand_write_page_syndrome - {REPLACABLE] hardware ecc syndrom based page write |
1438 | * @mtd: mtd info structure | |
1439 | * @chip: nand chip info structure | |
1440 | * @buf: data buffer | |
1da177e4 | 1441 | * |
f75e5097 TG |
1442 | * The hw generator calculates the error syndrome automatically. Therefor |
1443 | * we need a special oob layout and handling. | |
1444 | */ | |
1445 | static void nand_write_page_syndrome(struct mtd_info *mtd, | |
1446 | struct nand_chip *chip, const uint8_t *buf) | |
1da177e4 | 1447 | { |
f75e5097 TG |
1448 | int i, eccsize = chip->ecc.size; |
1449 | int eccbytes = chip->ecc.bytes; | |
1450 | int eccsteps = chip->ecc.steps; | |
1451 | const uint8_t *p = buf; | |
1452 | uint8_t *oob = chip->oob_poi; | |
1da177e4 | 1453 | |
f75e5097 | 1454 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { |
1da177e4 | 1455 | |
f75e5097 TG |
1456 | chip->ecc.hwctl(mtd, NAND_ECC_WRITE); |
1457 | chip->write_buf(mtd, p, eccsize); | |
61b03bd7 | 1458 | |
f75e5097 TG |
1459 | if (chip->ecc.prepad) { |
1460 | chip->write_buf(mtd, oob, chip->ecc.prepad); | |
1461 | oob += chip->ecc.prepad; | |
1462 | } | |
1463 | ||
1464 | chip->ecc.calculate(mtd, p, oob); | |
1465 | chip->write_buf(mtd, oob, eccbytes); | |
1466 | oob += eccbytes; | |
1467 | ||
1468 | if (chip->ecc.postpad) { | |
1469 | chip->write_buf(mtd, oob, chip->ecc.postpad); | |
1470 | oob += chip->ecc.postpad; | |
1da177e4 | 1471 | } |
1da177e4 | 1472 | } |
f75e5097 TG |
1473 | |
1474 | /* Calculate remaining oob bytes */ | |
7e4178f9 | 1475 | i = mtd->oobsize - (oob - chip->oob_poi); |
f75e5097 TG |
1476 | if (i) |
1477 | chip->write_buf(mtd, oob, i); | |
1478 | } | |
1479 | ||
1480 | /** | |
1481 | * nand_write_page - [INTERNAL] write one page | |
1482 | * @mtd: MTD device structure | |
1483 | * @chip: NAND chip descriptor | |
1484 | * @buf: the data to write | |
1485 | * @page: page number to write | |
1486 | * @cached: cached programming | |
1487 | */ | |
1488 | static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip, | |
1489 | const uint8_t *buf, int page, int cached) | |
1490 | { | |
1491 | int status; | |
1492 | ||
1493 | chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page); | |
1494 | ||
1495 | chip->ecc.write_page(mtd, chip, buf); | |
1496 | ||
1497 | /* | |
1498 | * Cached progamming disabled for now, Not sure if its worth the | |
1499 | * trouble. The speed gain is not very impressive. (2.3->2.6Mib/s) | |
1500 | */ | |
1501 | cached = 0; | |
1502 | ||
1503 | if (!cached || !(chip->options & NAND_CACHEPRG)) { | |
1504 | ||
1505 | chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); | |
7bc3312b | 1506 | status = chip->waitfunc(mtd, chip); |
f75e5097 TG |
1507 | /* |
1508 | * See if operation failed and additional status checks are | |
1509 | * available | |
1510 | */ | |
1511 | if ((status & NAND_STATUS_FAIL) && (chip->errstat)) | |
1512 | status = chip->errstat(mtd, chip, FL_WRITING, status, | |
1513 | page); | |
1514 | ||
1515 | if (status & NAND_STATUS_FAIL) | |
1516 | return -EIO; | |
1517 | } else { | |
1518 | chip->cmdfunc(mtd, NAND_CMD_CACHEDPROG, -1, -1); | |
7bc3312b | 1519 | status = chip->waitfunc(mtd, chip); |
f75e5097 TG |
1520 | } |
1521 | ||
1522 | #ifdef CONFIG_MTD_NAND_VERIFY_WRITE | |
1523 | /* Send command to read back the data */ | |
1524 | chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page); | |
1525 | ||
1526 | if (chip->verify_buf(mtd, buf, mtd->writesize)) | |
1527 | return -EIO; | |
1528 | #endif | |
1529 | return 0; | |
1da177e4 LT |
1530 | } |
1531 | ||
8593fbc6 TG |
1532 | /** |
1533 | * nand_fill_oob - [Internal] Transfer client buffer to oob | |
1534 | * @chip: nand chip structure | |
1535 | * @oob: oob data buffer | |
1536 | * @ops: oob ops structure | |
1537 | */ | |
1538 | static uint8_t *nand_fill_oob(struct nand_chip *chip, uint8_t *oob, | |
1539 | struct mtd_oob_ops *ops) | |
1540 | { | |
1541 | size_t len = ops->ooblen; | |
1542 | ||
1543 | switch(ops->mode) { | |
1544 | ||
1545 | case MTD_OOB_PLACE: | |
1546 | case MTD_OOB_RAW: | |
1547 | memcpy(chip->oob_poi + ops->ooboffs, oob, len); | |
1548 | return oob + len; | |
1549 | ||
1550 | case MTD_OOB_AUTO: { | |
1551 | struct nand_oobfree *free = chip->ecc.layout->oobfree; | |
7bc3312b TG |
1552 | uint32_t boffs = 0, woffs = ops->ooboffs; |
1553 | size_t bytes = 0; | |
8593fbc6 TG |
1554 | |
1555 | for(; free->length && len; free++, len -= bytes) { | |
7bc3312b TG |
1556 | /* Write request not from offset 0 ? */ |
1557 | if (unlikely(woffs)) { | |
1558 | if (woffs >= free->length) { | |
1559 | woffs -= free->length; | |
1560 | continue; | |
1561 | } | |
1562 | boffs = free->offset + woffs; | |
1563 | bytes = min_t(size_t, len, | |
1564 | (free->length - woffs)); | |
1565 | woffs = 0; | |
1566 | } else { | |
1567 | bytes = min_t(size_t, len, free->length); | |
1568 | boffs = free->offset; | |
1569 | } | |
8b0036ee | 1570 | memcpy(chip->oob_poi + boffs, oob, bytes); |
8593fbc6 TG |
1571 | oob += bytes; |
1572 | } | |
1573 | return oob; | |
1574 | } | |
1575 | default: | |
1576 | BUG(); | |
1577 | } | |
1578 | return NULL; | |
1579 | } | |
1580 | ||
28318776 | 1581 | #define NOTALIGNED(x) (x & (mtd->writesize-1)) != 0 |
1da177e4 LT |
1582 | |
1583 | /** | |
8593fbc6 | 1584 | * nand_do_write_ops - [Internal] NAND write with ECC |
1da177e4 LT |
1585 | * @mtd: MTD device structure |
1586 | * @to: offset to write to | |
8593fbc6 | 1587 | * @ops: oob operations description structure |
1da177e4 LT |
1588 | * |
1589 | * NAND write with ECC | |
1590 | */ | |
8593fbc6 TG |
1591 | static int nand_do_write_ops(struct mtd_info *mtd, loff_t to, |
1592 | struct mtd_oob_ops *ops) | |
1da177e4 | 1593 | { |
f75e5097 | 1594 | int chipnr, realpage, page, blockmask; |
ace4dfee | 1595 | struct nand_chip *chip = mtd->priv; |
8593fbc6 TG |
1596 | uint32_t writelen = ops->len; |
1597 | uint8_t *oob = ops->oobbuf; | |
1598 | uint8_t *buf = ops->datbuf; | |
f75e5097 | 1599 | int bytes = mtd->writesize; |
8593fbc6 | 1600 | int ret; |
1da177e4 | 1601 | |
8593fbc6 | 1602 | ops->retlen = 0; |
1da177e4 | 1603 | |
61b03bd7 | 1604 | /* reject writes, which are not page aligned */ |
8593fbc6 | 1605 | if (NOTALIGNED(to) || NOTALIGNED(ops->len)) { |
f75e5097 TG |
1606 | printk(KERN_NOTICE "nand_write: " |
1607 | "Attempt to write not page aligned data\n"); | |
1da177e4 LT |
1608 | return -EINVAL; |
1609 | } | |
1610 | ||
8593fbc6 | 1611 | if (!writelen) |
f75e5097 | 1612 | return 0; |
1da177e4 | 1613 | |
6a930961 TG |
1614 | chipnr = (int)(to >> chip->chip_shift); |
1615 | chip->select_chip(mtd, chipnr); | |
1616 | ||
1da177e4 LT |
1617 | /* Check, if it is write protected */ |
1618 | if (nand_check_wp(mtd)) | |
8593fbc6 | 1619 | return -EIO; |
1da177e4 | 1620 | |
f75e5097 TG |
1621 | realpage = (int)(to >> chip->page_shift); |
1622 | page = realpage & chip->pagemask; | |
1623 | blockmask = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1; | |
1624 | ||
1625 | /* Invalidate the page cache, when we write to the cached page */ | |
1626 | if (to <= (chip->pagebuf << chip->page_shift) && | |
8593fbc6 | 1627 | (chip->pagebuf << chip->page_shift) < (to + ops->len)) |
ace4dfee | 1628 | chip->pagebuf = -1; |
61b03bd7 | 1629 | |
f75e5097 | 1630 | chip->oob_poi = chip->buffers.oobwbuf; |
61b03bd7 | 1631 | |
f75e5097 TG |
1632 | while(1) { |
1633 | int cached = writelen > bytes && page != blockmask; | |
1da177e4 | 1634 | |
8593fbc6 TG |
1635 | if (unlikely(oob)) |
1636 | oob = nand_fill_oob(chip, oob, ops); | |
1637 | ||
f75e5097 TG |
1638 | ret = nand_write_page(mtd, chip, buf, page, cached); |
1639 | if (ret) | |
1640 | break; | |
1641 | ||
1642 | writelen -= bytes; | |
1643 | if (!writelen) | |
1644 | break; | |
1645 | ||
1646 | buf += bytes; | |
1647 | realpage++; | |
1648 | ||
1649 | page = realpage & chip->pagemask; | |
1650 | /* Check, if we cross a chip boundary */ | |
1651 | if (!page) { | |
1652 | chipnr++; | |
1653 | chip->select_chip(mtd, -1); | |
1654 | chip->select_chip(mtd, chipnr); | |
1da177e4 LT |
1655 | } |
1656 | } | |
8593fbc6 TG |
1657 | |
1658 | if (unlikely(oob)) | |
1659 | memset(chip->oob_poi, 0xff, mtd->oobsize); | |
1660 | ||
1661 | ops->retlen = ops->len - writelen; | |
1da177e4 LT |
1662 | return ret; |
1663 | } | |
1664 | ||
f75e5097 | 1665 | /** |
8593fbc6 | 1666 | * nand_write - [MTD Interface] NAND write with ECC |
f75e5097 | 1667 | * @mtd: MTD device structure |
f75e5097 TG |
1668 | * @to: offset to write to |
1669 | * @len: number of bytes to write | |
8593fbc6 TG |
1670 | * @retlen: pointer to variable to store the number of written bytes |
1671 | * @buf: the data to write | |
f75e5097 | 1672 | * |
8593fbc6 | 1673 | * NAND write with ECC |
f75e5097 | 1674 | */ |
8593fbc6 TG |
1675 | static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, |
1676 | size_t *retlen, const uint8_t *buf) | |
f75e5097 TG |
1677 | { |
1678 | struct nand_chip *chip = mtd->priv; | |
f75e5097 TG |
1679 | int ret; |
1680 | ||
8593fbc6 TG |
1681 | /* Do not allow reads past end of device */ |
1682 | if ((to + len) > mtd->size) | |
f75e5097 | 1683 | return -EINVAL; |
8593fbc6 TG |
1684 | if (!len) |
1685 | return 0; | |
f75e5097 | 1686 | |
7bc3312b | 1687 | nand_get_device(chip, mtd, FL_WRITING); |
f75e5097 | 1688 | |
8593fbc6 TG |
1689 | chip->ops.len = len; |
1690 | chip->ops.datbuf = (uint8_t *)buf; | |
1691 | chip->ops.oobbuf = NULL; | |
f75e5097 | 1692 | |
8593fbc6 | 1693 | ret = nand_do_write_ops(mtd, to, &chip->ops); |
f75e5097 | 1694 | |
7fd5aecc RP |
1695 | *retlen = chip->ops.retlen; |
1696 | ||
f75e5097 | 1697 | nand_release_device(mtd); |
8593fbc6 | 1698 | |
8593fbc6 | 1699 | return ret; |
f75e5097 | 1700 | } |
7314e9e7 | 1701 | |
1da177e4 | 1702 | /** |
8593fbc6 | 1703 | * nand_do_write_oob - [MTD Interface] NAND write out-of-band |
1da177e4 LT |
1704 | * @mtd: MTD device structure |
1705 | * @to: offset to write to | |
8593fbc6 | 1706 | * @ops: oob operation description structure |
1da177e4 LT |
1707 | * |
1708 | * NAND write out-of-band | |
1709 | */ | |
8593fbc6 TG |
1710 | static int nand_do_write_oob(struct mtd_info *mtd, loff_t to, |
1711 | struct mtd_oob_ops *ops) | |
1da177e4 | 1712 | { |
8593fbc6 | 1713 | int chipnr, page, status; |
ace4dfee | 1714 | struct nand_chip *chip = mtd->priv; |
1da177e4 | 1715 | |
7314e9e7 | 1716 | DEBUG(MTD_DEBUG_LEVEL3, "nand_write_oob: to = 0x%08x, len = %i\n", |
8593fbc6 | 1717 | (unsigned int)to, (int)ops->len); |
1da177e4 LT |
1718 | |
1719 | /* Do not allow write past end of page */ | |
8593fbc6 | 1720 | if ((ops->ooboffs + ops->len) > mtd->oobsize) { |
7314e9e7 TG |
1721 | DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: " |
1722 | "Attempt to write past end of page\n"); | |
1da177e4 LT |
1723 | return -EINVAL; |
1724 | } | |
1725 | ||
7314e9e7 | 1726 | chipnr = (int)(to >> chip->chip_shift); |
ace4dfee | 1727 | chip->select_chip(mtd, chipnr); |
1da177e4 | 1728 | |
7314e9e7 TG |
1729 | /* Shift to get page */ |
1730 | page = (int)(to >> chip->page_shift); | |
1731 | ||
1732 | /* | |
1733 | * Reset the chip. Some chips (like the Toshiba TC5832DC found in one | |
1734 | * of my DiskOnChip 2000 test units) will clear the whole data page too | |
1735 | * if we don't do this. I have no clue why, but I seem to have 'fixed' | |
1736 | * it in the doc2000 driver in August 1999. dwmw2. | |
1737 | */ | |
ace4dfee | 1738 | chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); |
1da177e4 LT |
1739 | |
1740 | /* Check, if it is write protected */ | |
1741 | if (nand_check_wp(mtd)) | |
8593fbc6 | 1742 | return -EROFS; |
61b03bd7 | 1743 | |
1da177e4 | 1744 | /* Invalidate the page cache, if we write to the cached page */ |
ace4dfee TG |
1745 | if (page == chip->pagebuf) |
1746 | chip->pagebuf = -1; | |
1da177e4 | 1747 | |
7bc3312b TG |
1748 | chip->oob_poi = chip->buffers.oobwbuf; |
1749 | memset(chip->oob_poi, 0xff, mtd->oobsize); | |
1750 | nand_fill_oob(chip, ops->oobbuf, ops); | |
1751 | status = chip->ecc.write_oob(mtd, chip, page & chip->pagemask); | |
1752 | memset(chip->oob_poi, 0xff, mtd->oobsize); | |
1da177e4 | 1753 | |
7bc3312b TG |
1754 | if (status) |
1755 | return status; | |
1da177e4 | 1756 | |
8593fbc6 | 1757 | ops->retlen = ops->len; |
1da177e4 | 1758 | |
7bc3312b | 1759 | return 0; |
8593fbc6 TG |
1760 | } |
1761 | ||
1762 | /** | |
1763 | * nand_write_oob - [MTD Interface] NAND write data and/or out-of-band | |
1764 | * @mtd: MTD device structure | |
844d3b42 | 1765 | * @to: offset to write to |
8593fbc6 TG |
1766 | * @ops: oob operation description structure |
1767 | */ | |
1768 | static int nand_write_oob(struct mtd_info *mtd, loff_t to, | |
1769 | struct mtd_oob_ops *ops) | |
1770 | { | |
1771 | void (*write_page)(struct mtd_info *mtd, struct nand_chip *chip, | |
1772 | const uint8_t *buf) = NULL; | |
1773 | struct nand_chip *chip = mtd->priv; | |
1774 | int ret = -ENOTSUPP; | |
1775 | ||
1776 | ops->retlen = 0; | |
1777 | ||
1778 | /* Do not allow writes past end of device */ | |
1779 | if ((to + ops->len) > mtd->size) { | |
1780 | DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: " | |
1781 | "Attempt read beyond end of device\n"); | |
1782 | return -EINVAL; | |
1783 | } | |
1784 | ||
7bc3312b | 1785 | nand_get_device(chip, mtd, FL_WRITING); |
8593fbc6 TG |
1786 | |
1787 | switch(ops->mode) { | |
1788 | case MTD_OOB_PLACE: | |
1789 | case MTD_OOB_AUTO: | |
1790 | break; | |
1791 | ||
1792 | case MTD_OOB_RAW: | |
1793 | /* Replace the write_page algorithm temporary */ | |
1794 | write_page = chip->ecc.write_page; | |
1795 | chip->ecc.write_page = nand_write_page_raw; | |
1796 | break; | |
1797 | ||
1798 | default: | |
1799 | goto out; | |
1800 | } | |
1801 | ||
1802 | if (!ops->datbuf) | |
1803 | ret = nand_do_write_oob(mtd, to, ops); | |
1804 | else | |
1805 | ret = nand_do_write_ops(mtd, to, ops); | |
1806 | ||
1807 | if (unlikely(ops->mode == MTD_OOB_RAW)) | |
1808 | chip->ecc.write_page = write_page; | |
e0c7d767 | 1809 | out: |
1da177e4 | 1810 | nand_release_device(mtd); |
1da177e4 LT |
1811 | return ret; |
1812 | } | |
1813 | ||
1da177e4 LT |
1814 | /** |
1815 | * single_erease_cmd - [GENERIC] NAND standard block erase command function | |
1816 | * @mtd: MTD device structure | |
1817 | * @page: the page address of the block which will be erased | |
1818 | * | |
1819 | * Standard erase command for NAND chips | |
1820 | */ | |
e0c7d767 | 1821 | static void single_erase_cmd(struct mtd_info *mtd, int page) |
1da177e4 | 1822 | { |
ace4dfee | 1823 | struct nand_chip *chip = mtd->priv; |
1da177e4 | 1824 | /* Send commands to erase a block */ |
ace4dfee TG |
1825 | chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page); |
1826 | chip->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1); | |
1da177e4 LT |
1827 | } |
1828 | ||
1829 | /** | |
1830 | * multi_erease_cmd - [GENERIC] AND specific block erase command function | |
1831 | * @mtd: MTD device structure | |
1832 | * @page: the page address of the block which will be erased | |
1833 | * | |
1834 | * AND multi block erase command function | |
1835 | * Erase 4 consecutive blocks | |
1836 | */ | |
e0c7d767 | 1837 | static void multi_erase_cmd(struct mtd_info *mtd, int page) |
1da177e4 | 1838 | { |
ace4dfee | 1839 | struct nand_chip *chip = mtd->priv; |
1da177e4 | 1840 | /* Send commands to erase a block */ |
ace4dfee TG |
1841 | chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++); |
1842 | chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++); | |
1843 | chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++); | |
1844 | chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page); | |
1845 | chip->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1); | |
1da177e4 LT |
1846 | } |
1847 | ||
1848 | /** | |
1849 | * nand_erase - [MTD Interface] erase block(s) | |
1850 | * @mtd: MTD device structure | |
1851 | * @instr: erase instruction | |
1852 | * | |
1853 | * Erase one ore more blocks | |
1854 | */ | |
e0c7d767 | 1855 | static int nand_erase(struct mtd_info *mtd, struct erase_info *instr) |
1da177e4 | 1856 | { |
e0c7d767 | 1857 | return nand_erase_nand(mtd, instr, 0); |
1da177e4 | 1858 | } |
61b03bd7 | 1859 | |
30f464b7 | 1860 | #define BBT_PAGE_MASK 0xffffff3f |
1da177e4 | 1861 | /** |
ace4dfee | 1862 | * nand_erase_nand - [Internal] erase block(s) |
1da177e4 LT |
1863 | * @mtd: MTD device structure |
1864 | * @instr: erase instruction | |
1865 | * @allowbbt: allow erasing the bbt area | |
1866 | * | |
1867 | * Erase one ore more blocks | |
1868 | */ | |
ace4dfee TG |
1869 | int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr, |
1870 | int allowbbt) | |
1da177e4 LT |
1871 | { |
1872 | int page, len, status, pages_per_block, ret, chipnr; | |
ace4dfee TG |
1873 | struct nand_chip *chip = mtd->priv; |
1874 | int rewrite_bbt[NAND_MAX_CHIPS]={0}; | |
1875 | unsigned int bbt_masked_page = 0xffffffff; | |
1da177e4 | 1876 | |
ace4dfee TG |
1877 | DEBUG(MTD_DEBUG_LEVEL3, "nand_erase: start = 0x%08x, len = %i\n", |
1878 | (unsigned int)instr->addr, (unsigned int)instr->len); | |
1da177e4 LT |
1879 | |
1880 | /* Start address must align on block boundary */ | |
ace4dfee | 1881 | if (instr->addr & ((1 << chip->phys_erase_shift) - 1)) { |
e0c7d767 | 1882 | DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Unaligned address\n"); |
1da177e4 LT |
1883 | return -EINVAL; |
1884 | } | |
1885 | ||
1886 | /* Length must align on block boundary */ | |
ace4dfee TG |
1887 | if (instr->len & ((1 << chip->phys_erase_shift) - 1)) { |
1888 | DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: " | |
1889 | "Length not block aligned\n"); | |
1da177e4 LT |
1890 | return -EINVAL; |
1891 | } | |
1892 | ||
1893 | /* Do not allow erase past end of device */ | |
1894 | if ((instr->len + instr->addr) > mtd->size) { | |
ace4dfee TG |
1895 | DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: " |
1896 | "Erase past end of device\n"); | |
1da177e4 LT |
1897 | return -EINVAL; |
1898 | } | |
1899 | ||
1900 | instr->fail_addr = 0xffffffff; | |
1901 | ||
1902 | /* Grab the lock and see if the device is available */ | |
ace4dfee | 1903 | nand_get_device(chip, mtd, FL_ERASING); |
1da177e4 LT |
1904 | |
1905 | /* Shift to get first page */ | |
ace4dfee TG |
1906 | page = (int)(instr->addr >> chip->page_shift); |
1907 | chipnr = (int)(instr->addr >> chip->chip_shift); | |
1da177e4 LT |
1908 | |
1909 | /* Calculate pages in each block */ | |
ace4dfee | 1910 | pages_per_block = 1 << (chip->phys_erase_shift - chip->page_shift); |
1da177e4 LT |
1911 | |
1912 | /* Select the NAND device */ | |
ace4dfee | 1913 | chip->select_chip(mtd, chipnr); |
1da177e4 | 1914 | |
1da177e4 LT |
1915 | /* Check, if it is write protected */ |
1916 | if (nand_check_wp(mtd)) { | |
ace4dfee TG |
1917 | DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: " |
1918 | "Device is write protected!!!\n"); | |
1da177e4 LT |
1919 | instr->state = MTD_ERASE_FAILED; |
1920 | goto erase_exit; | |
1921 | } | |
1922 | ||
ace4dfee TG |
1923 | /* |
1924 | * If BBT requires refresh, set the BBT page mask to see if the BBT | |
1925 | * should be rewritten. Otherwise the mask is set to 0xffffffff which | |
1926 | * can not be matched. This is also done when the bbt is actually | |
1927 | * erased to avoid recusrsive updates | |
1928 | */ | |
1929 | if (chip->options & BBT_AUTO_REFRESH && !allowbbt) | |
1930 | bbt_masked_page = chip->bbt_td->pages[chipnr] & BBT_PAGE_MASK; | |
30f464b7 | 1931 | |
1da177e4 LT |
1932 | /* Loop through the pages */ |
1933 | len = instr->len; | |
1934 | ||
1935 | instr->state = MTD_ERASING; | |
1936 | ||
1937 | while (len) { | |
ace4dfee TG |
1938 | /* |
1939 | * heck if we have a bad block, we do not erase bad blocks ! | |
1940 | */ | |
1941 | if (nand_block_checkbad(mtd, ((loff_t) page) << | |
1942 | chip->page_shift, 0, allowbbt)) { | |
1943 | printk(KERN_WARNING "nand_erase: attempt to erase a " | |
1944 | "bad block at page 0x%08x\n", page); | |
1da177e4 LT |
1945 | instr->state = MTD_ERASE_FAILED; |
1946 | goto erase_exit; | |
1947 | } | |
61b03bd7 | 1948 | |
ace4dfee TG |
1949 | /* |
1950 | * Invalidate the page cache, if we erase the block which | |
1951 | * contains the current cached page | |
1952 | */ | |
1953 | if (page <= chip->pagebuf && chip->pagebuf < | |
1954 | (page + pages_per_block)) | |
1955 | chip->pagebuf = -1; | |
1da177e4 | 1956 | |
ace4dfee | 1957 | chip->erase_cmd(mtd, page & chip->pagemask); |
61b03bd7 | 1958 | |
7bc3312b | 1959 | status = chip->waitfunc(mtd, chip); |
1da177e4 | 1960 | |
ace4dfee TG |
1961 | /* |
1962 | * See if operation failed and additional status checks are | |
1963 | * available | |
1964 | */ | |
1965 | if ((status & NAND_STATUS_FAIL) && (chip->errstat)) | |
1966 | status = chip->errstat(mtd, chip, FL_ERASING, | |
1967 | status, page); | |
068e3c0a | 1968 | |
1da177e4 | 1969 | /* See if block erase succeeded */ |
a4ab4c5d | 1970 | if (status & NAND_STATUS_FAIL) { |
ace4dfee TG |
1971 | DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: " |
1972 | "Failed erase, page 0x%08x\n", page); | |
1da177e4 | 1973 | instr->state = MTD_ERASE_FAILED; |
ace4dfee | 1974 | instr->fail_addr = (page << chip->page_shift); |
1da177e4 LT |
1975 | goto erase_exit; |
1976 | } | |
30f464b7 | 1977 | |
ace4dfee TG |
1978 | /* |
1979 | * If BBT requires refresh, set the BBT rewrite flag to the | |
1980 | * page being erased | |
1981 | */ | |
1982 | if (bbt_masked_page != 0xffffffff && | |
1983 | (page & BBT_PAGE_MASK) == bbt_masked_page) | |
1984 | rewrite_bbt[chipnr] = (page << chip->page_shift); | |
61b03bd7 | 1985 | |
1da177e4 | 1986 | /* Increment page address and decrement length */ |
ace4dfee | 1987 | len -= (1 << chip->phys_erase_shift); |
1da177e4 LT |
1988 | page += pages_per_block; |
1989 | ||
1990 | /* Check, if we cross a chip boundary */ | |
ace4dfee | 1991 | if (len && !(page & chip->pagemask)) { |
1da177e4 | 1992 | chipnr++; |
ace4dfee TG |
1993 | chip->select_chip(mtd, -1); |
1994 | chip->select_chip(mtd, chipnr); | |
30f464b7 | 1995 | |
ace4dfee TG |
1996 | /* |
1997 | * If BBT requires refresh and BBT-PERCHIP, set the BBT | |
1998 | * page mask to see if this BBT should be rewritten | |
1999 | */ | |
2000 | if (bbt_masked_page != 0xffffffff && | |
2001 | (chip->bbt_td->options & NAND_BBT_PERCHIP)) | |
2002 | bbt_masked_page = chip->bbt_td->pages[chipnr] & | |
2003 | BBT_PAGE_MASK; | |
1da177e4 LT |
2004 | } |
2005 | } | |
2006 | instr->state = MTD_ERASE_DONE; | |
2007 | ||
e0c7d767 | 2008 | erase_exit: |
1da177e4 LT |
2009 | |
2010 | ret = instr->state == MTD_ERASE_DONE ? 0 : -EIO; | |
2011 | /* Do call back function */ | |
2012 | if (!ret) | |
2013 | mtd_erase_callback(instr); | |
2014 | ||
2015 | /* Deselect and wake up anyone waiting on the device */ | |
2016 | nand_release_device(mtd); | |
2017 | ||
ace4dfee TG |
2018 | /* |
2019 | * If BBT requires refresh and erase was successful, rewrite any | |
2020 | * selected bad block tables | |
2021 | */ | |
2022 | if (bbt_masked_page == 0xffffffff || ret) | |
2023 | return ret; | |
2024 | ||
2025 | for (chipnr = 0; chipnr < chip->numchips; chipnr++) { | |
2026 | if (!rewrite_bbt[chipnr]) | |
2027 | continue; | |
2028 | /* update the BBT for chip */ | |
2029 | DEBUG(MTD_DEBUG_LEVEL0, "nand_erase_nand: nand_update_bbt " | |
2030 | "(%d:0x%0x 0x%0x)\n", chipnr, rewrite_bbt[chipnr], | |
2031 | chip->bbt_td->pages[chipnr]); | |
2032 | nand_update_bbt(mtd, rewrite_bbt[chipnr]); | |
30f464b7 DM |
2033 | } |
2034 | ||
1da177e4 LT |
2035 | /* Return more or less happy */ |
2036 | return ret; | |
2037 | } | |
2038 | ||
2039 | /** | |
2040 | * nand_sync - [MTD Interface] sync | |
2041 | * @mtd: MTD device structure | |
2042 | * | |
2043 | * Sync is actually a wait for chip ready function | |
2044 | */ | |
e0c7d767 | 2045 | static void nand_sync(struct mtd_info *mtd) |
1da177e4 | 2046 | { |
ace4dfee | 2047 | struct nand_chip *chip = mtd->priv; |
1da177e4 | 2048 | |
e0c7d767 | 2049 | DEBUG(MTD_DEBUG_LEVEL3, "nand_sync: called\n"); |
1da177e4 LT |
2050 | |
2051 | /* Grab the lock and see if the device is available */ | |
ace4dfee | 2052 | nand_get_device(chip, mtd, FL_SYNCING); |
1da177e4 | 2053 | /* Release it and go back */ |
e0c7d767 | 2054 | nand_release_device(mtd); |
1da177e4 LT |
2055 | } |
2056 | ||
1da177e4 | 2057 | /** |
ace4dfee | 2058 | * nand_block_isbad - [MTD Interface] Check if block at offset is bad |
1da177e4 | 2059 | * @mtd: MTD device structure |
844d3b42 | 2060 | * @offs: offset relative to mtd start |
1da177e4 | 2061 | */ |
ace4dfee | 2062 | static int nand_block_isbad(struct mtd_info *mtd, loff_t offs) |
1da177e4 LT |
2063 | { |
2064 | /* Check for invalid offset */ | |
ace4dfee | 2065 | if (offs > mtd->size) |
1da177e4 | 2066 | return -EINVAL; |
61b03bd7 | 2067 | |
ace4dfee | 2068 | return nand_block_checkbad(mtd, offs, 1, 0); |
1da177e4 LT |
2069 | } |
2070 | ||
2071 | /** | |
ace4dfee | 2072 | * nand_block_markbad - [MTD Interface] Mark block at the given offset as bad |
1da177e4 LT |
2073 | * @mtd: MTD device structure |
2074 | * @ofs: offset relative to mtd start | |
2075 | */ | |
e0c7d767 | 2076 | static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs) |
1da177e4 | 2077 | { |
ace4dfee | 2078 | struct nand_chip *chip = mtd->priv; |
1da177e4 LT |
2079 | int ret; |
2080 | ||
e0c7d767 DW |
2081 | if ((ret = nand_block_isbad(mtd, ofs))) { |
2082 | /* If it was bad already, return success and do nothing. */ | |
1da177e4 LT |
2083 | if (ret > 0) |
2084 | return 0; | |
e0c7d767 DW |
2085 | return ret; |
2086 | } | |
1da177e4 | 2087 | |
ace4dfee | 2088 | return chip->block_markbad(mtd, ofs); |
1da177e4 LT |
2089 | } |
2090 | ||
962034f4 VW |
2091 | /** |
2092 | * nand_suspend - [MTD Interface] Suspend the NAND flash | |
2093 | * @mtd: MTD device structure | |
2094 | */ | |
2095 | static int nand_suspend(struct mtd_info *mtd) | |
2096 | { | |
ace4dfee | 2097 | struct nand_chip *chip = mtd->priv; |
962034f4 | 2098 | |
ace4dfee | 2099 | return nand_get_device(chip, mtd, FL_PM_SUSPENDED); |
962034f4 VW |
2100 | } |
2101 | ||
2102 | /** | |
2103 | * nand_resume - [MTD Interface] Resume the NAND flash | |
2104 | * @mtd: MTD device structure | |
2105 | */ | |
2106 | static void nand_resume(struct mtd_info *mtd) | |
2107 | { | |
ace4dfee | 2108 | struct nand_chip *chip = mtd->priv; |
962034f4 | 2109 | |
ace4dfee | 2110 | if (chip->state == FL_PM_SUSPENDED) |
962034f4 VW |
2111 | nand_release_device(mtd); |
2112 | else | |
2c0a2bed TG |
2113 | printk(KERN_ERR "nand_resume() called for a chip which is not " |
2114 | "in suspended state\n"); | |
962034f4 VW |
2115 | } |
2116 | ||
7aa65bfd TG |
2117 | /* |
2118 | * Set default functions | |
2119 | */ | |
ace4dfee | 2120 | static void nand_set_defaults(struct nand_chip *chip, int busw) |
7aa65bfd | 2121 | { |
1da177e4 | 2122 | /* check for proper chip_delay setup, set 20us if not */ |
ace4dfee TG |
2123 | if (!chip->chip_delay) |
2124 | chip->chip_delay = 20; | |
1da177e4 LT |
2125 | |
2126 | /* check, if a user supplied command function given */ | |
ace4dfee TG |
2127 | if (chip->cmdfunc == NULL) |
2128 | chip->cmdfunc = nand_command; | |
1da177e4 LT |
2129 | |
2130 | /* check, if a user supplied wait function given */ | |
ace4dfee TG |
2131 | if (chip->waitfunc == NULL) |
2132 | chip->waitfunc = nand_wait; | |
2133 | ||
2134 | if (!chip->select_chip) | |
2135 | chip->select_chip = nand_select_chip; | |
2136 | if (!chip->read_byte) | |
2137 | chip->read_byte = busw ? nand_read_byte16 : nand_read_byte; | |
2138 | if (!chip->read_word) | |
2139 | chip->read_word = nand_read_word; | |
2140 | if (!chip->block_bad) | |
2141 | chip->block_bad = nand_block_bad; | |
2142 | if (!chip->block_markbad) | |
2143 | chip->block_markbad = nand_default_block_markbad; | |
2144 | if (!chip->write_buf) | |
2145 | chip->write_buf = busw ? nand_write_buf16 : nand_write_buf; | |
2146 | if (!chip->read_buf) | |
2147 | chip->read_buf = busw ? nand_read_buf16 : nand_read_buf; | |
2148 | if (!chip->verify_buf) | |
2149 | chip->verify_buf = busw ? nand_verify_buf16 : nand_verify_buf; | |
2150 | if (!chip->scan_bbt) | |
2151 | chip->scan_bbt = nand_default_bbt; | |
f75e5097 TG |
2152 | |
2153 | if (!chip->controller) { | |
2154 | chip->controller = &chip->hwcontrol; | |
2155 | spin_lock_init(&chip->controller->lock); | |
2156 | init_waitqueue_head(&chip->controller->wq); | |
2157 | } | |
2158 | ||
7aa65bfd TG |
2159 | } |
2160 | ||
2161 | /* | |
ace4dfee | 2162 | * Get the flash and manufacturer id and lookup if the type is supported |
7aa65bfd TG |
2163 | */ |
2164 | static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, | |
ace4dfee | 2165 | struct nand_chip *chip, |
7aa65bfd TG |
2166 | int busw, int *maf_id) |
2167 | { | |
2168 | struct nand_flash_dev *type = NULL; | |
2169 | int i, dev_id, maf_idx; | |
1da177e4 LT |
2170 | |
2171 | /* Select the device */ | |
ace4dfee | 2172 | chip->select_chip(mtd, 0); |
1da177e4 LT |
2173 | |
2174 | /* Send the command for reading device ID */ | |
ace4dfee | 2175 | chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); |
1da177e4 LT |
2176 | |
2177 | /* Read manufacturer and device IDs */ | |
ace4dfee TG |
2178 | *maf_id = chip->read_byte(mtd); |
2179 | dev_id = chip->read_byte(mtd); | |
1da177e4 | 2180 | |
7aa65bfd | 2181 | /* Lookup the flash id */ |
1da177e4 | 2182 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { |
7aa65bfd TG |
2183 | if (dev_id == nand_flash_ids[i].id) { |
2184 | type = &nand_flash_ids[i]; | |
2185 | break; | |
2186 | } | |
2187 | } | |
61b03bd7 | 2188 | |
7aa65bfd TG |
2189 | if (!type) |
2190 | return ERR_PTR(-ENODEV); | |
2191 | ||
ba0251fe TG |
2192 | if (!mtd->name) |
2193 | mtd->name = type->name; | |
2194 | ||
2195 | chip->chipsize = type->chipsize << 20; | |
7aa65bfd TG |
2196 | |
2197 | /* Newer devices have all the information in additional id bytes */ | |
ba0251fe | 2198 | if (!type->pagesize) { |
7aa65bfd TG |
2199 | int extid; |
2200 | /* The 3rd id byte contains non relevant data ATM */ | |
ace4dfee | 2201 | extid = chip->read_byte(mtd); |
7aa65bfd | 2202 | /* The 4th id byte is the important one */ |
ace4dfee | 2203 | extid = chip->read_byte(mtd); |
7aa65bfd | 2204 | /* Calc pagesize */ |
4cbb9b80 | 2205 | mtd->writesize = 1024 << (extid & 0x3); |
7aa65bfd TG |
2206 | extid >>= 2; |
2207 | /* Calc oobsize */ | |
4cbb9b80 | 2208 | mtd->oobsize = (8 << (extid & 0x01)) * (mtd->writesize >> 9); |
7aa65bfd TG |
2209 | extid >>= 2; |
2210 | /* Calc blocksize. Blocksize is multiples of 64KiB */ | |
2211 | mtd->erasesize = (64 * 1024) << (extid & 0x03); | |
2212 | extid >>= 2; | |
2213 | /* Get buswidth information */ | |
2214 | busw = (extid & 0x01) ? NAND_BUSWIDTH_16 : 0; | |
61b03bd7 | 2215 | |
7aa65bfd TG |
2216 | } else { |
2217 | /* | |
ace4dfee | 2218 | * Old devices have chip data hardcoded in the device id table |
7aa65bfd | 2219 | */ |
ba0251fe TG |
2220 | mtd->erasesize = type->erasesize; |
2221 | mtd->writesize = type->pagesize; | |
4cbb9b80 | 2222 | mtd->oobsize = mtd->writesize / 32; |
ba0251fe | 2223 | busw = type->options & NAND_BUSWIDTH_16; |
7aa65bfd | 2224 | } |
1da177e4 | 2225 | |
7aa65bfd | 2226 | /* Try to identify manufacturer */ |
9a909867 | 2227 | for (maf_idx = 0; nand_manuf_ids[maf_idx].id != 0x0; maf_idx++) { |
7aa65bfd TG |
2228 | if (nand_manuf_ids[maf_idx].id == *maf_id) |
2229 | break; | |
2230 | } | |
0ea4a755 | 2231 | |
7aa65bfd TG |
2232 | /* |
2233 | * Check, if buswidth is correct. Hardware drivers should set | |
ace4dfee | 2234 | * chip correct ! |
7aa65bfd | 2235 | */ |
ace4dfee | 2236 | if (busw != (chip->options & NAND_BUSWIDTH_16)) { |
7aa65bfd TG |
2237 | printk(KERN_INFO "NAND device: Manufacturer ID:" |
2238 | " 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, | |
2239 | dev_id, nand_manuf_ids[maf_idx].name, mtd->name); | |
2240 | printk(KERN_WARNING "NAND bus width %d instead %d bit\n", | |
ace4dfee | 2241 | (chip->options & NAND_BUSWIDTH_16) ? 16 : 8, |
7aa65bfd TG |
2242 | busw ? 16 : 8); |
2243 | return ERR_PTR(-EINVAL); | |
2244 | } | |
61b03bd7 | 2245 | |
7aa65bfd | 2246 | /* Calculate the address shift from the page size */ |
ace4dfee | 2247 | chip->page_shift = ffs(mtd->writesize) - 1; |
7aa65bfd | 2248 | /* Convert chipsize to number of pages per chip -1. */ |
ace4dfee | 2249 | chip->pagemask = (chip->chipsize >> chip->page_shift) - 1; |
61b03bd7 | 2250 | |
ace4dfee | 2251 | chip->bbt_erase_shift = chip->phys_erase_shift = |
7aa65bfd | 2252 | ffs(mtd->erasesize) - 1; |
ace4dfee | 2253 | chip->chip_shift = ffs(chip->chipsize) - 1; |
1da177e4 | 2254 | |
7aa65bfd | 2255 | /* Set the bad block position */ |
ace4dfee | 2256 | chip->badblockpos = mtd->writesize > 512 ? |
7aa65bfd | 2257 | NAND_LARGE_BADBLOCK_POS : NAND_SMALL_BADBLOCK_POS; |
61b03bd7 | 2258 | |
7aa65bfd | 2259 | /* Get chip options, preserve non chip based options */ |
ace4dfee | 2260 | chip->options &= ~NAND_CHIPOPTIONS_MSK; |
ba0251fe | 2261 | chip->options |= type->options & NAND_CHIPOPTIONS_MSK; |
7aa65bfd TG |
2262 | |
2263 | /* | |
ace4dfee | 2264 | * Set chip as a default. Board drivers can override it, if necessary |
7aa65bfd | 2265 | */ |
ace4dfee | 2266 | chip->options |= NAND_NO_AUTOINCR; |
7aa65bfd | 2267 | |
ace4dfee | 2268 | /* Check if chip is a not a samsung device. Do not clear the |
7aa65bfd TG |
2269 | * options for chips which are not having an extended id. |
2270 | */ | |
ba0251fe | 2271 | if (*maf_id != NAND_MFR_SAMSUNG && !type->pagesize) |
ace4dfee | 2272 | chip->options &= ~NAND_SAMSUNG_LP_OPTIONS; |
7aa65bfd TG |
2273 | |
2274 | /* Check for AND chips with 4 page planes */ | |
ace4dfee TG |
2275 | if (chip->options & NAND_4PAGE_ARRAY) |
2276 | chip->erase_cmd = multi_erase_cmd; | |
7aa65bfd | 2277 | else |
ace4dfee | 2278 | chip->erase_cmd = single_erase_cmd; |
7aa65bfd TG |
2279 | |
2280 | /* Do not replace user supplied command function ! */ | |
ace4dfee TG |
2281 | if (mtd->writesize > 512 && chip->cmdfunc == nand_command) |
2282 | chip->cmdfunc = nand_command_lp; | |
7aa65bfd TG |
2283 | |
2284 | printk(KERN_INFO "NAND device: Manufacturer ID:" | |
2285 | " 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, dev_id, | |
2286 | nand_manuf_ids[maf_idx].name, type->name); | |
2287 | ||
2288 | return type; | |
2289 | } | |
2290 | ||
2291 | /* module_text_address() isn't exported, and it's mostly a pointless | |
2292 | test if this is a module _anyway_ -- they'd have to try _really_ hard | |
2293 | to call us from in-kernel code if the core NAND support is modular. */ | |
2294 | #ifdef MODULE | |
2295 | #define caller_is_module() (1) | |
2296 | #else | |
2297 | #define caller_is_module() \ | |
2298 | module_text_address((unsigned long)__builtin_return_address(0)) | |
2299 | #endif | |
2300 | ||
2301 | /** | |
2302 | * nand_scan - [NAND Interface] Scan for the NAND device | |
2303 | * @mtd: MTD device structure | |
2304 | * @maxchips: Number of chips to scan for | |
2305 | * | |
2306 | * This fills out all the uninitialized function pointers | |
2307 | * with the defaults. | |
2308 | * The flash ID is read and the mtd/chip structures are | |
f75e5097 | 2309 | * filled with the appropriate values. |
7aa65bfd TG |
2310 | * The mtd->owner field must be set to the module of the caller |
2311 | * | |
2312 | */ | |
2313 | int nand_scan(struct mtd_info *mtd, int maxchips) | |
2314 | { | |
2315 | int i, busw, nand_maf_id; | |
ace4dfee | 2316 | struct nand_chip *chip = mtd->priv; |
7aa65bfd TG |
2317 | struct nand_flash_dev *type; |
2318 | ||
2319 | /* Many callers got this wrong, so check for it for a while... */ | |
2320 | if (!mtd->owner && caller_is_module()) { | |
2321 | printk(KERN_CRIT "nand_scan() called with NULL mtd->owner!\n"); | |
2322 | BUG(); | |
1da177e4 LT |
2323 | } |
2324 | ||
7aa65bfd | 2325 | /* Get buswidth to select the correct functions */ |
ace4dfee | 2326 | busw = chip->options & NAND_BUSWIDTH_16; |
7aa65bfd | 2327 | /* Set the default functions */ |
ace4dfee | 2328 | nand_set_defaults(chip, busw); |
7aa65bfd TG |
2329 | |
2330 | /* Read the flash type */ | |
ace4dfee | 2331 | type = nand_get_flash_type(mtd, chip, busw, &nand_maf_id); |
7aa65bfd TG |
2332 | |
2333 | if (IS_ERR(type)) { | |
e0c7d767 | 2334 | printk(KERN_WARNING "No NAND device found!!!\n"); |
ace4dfee | 2335 | chip->select_chip(mtd, -1); |
7aa65bfd | 2336 | return PTR_ERR(type); |
1da177e4 LT |
2337 | } |
2338 | ||
7aa65bfd | 2339 | /* Check for a chip array */ |
e0c7d767 | 2340 | for (i = 1; i < maxchips; i++) { |
ace4dfee | 2341 | chip->select_chip(mtd, i); |
1da177e4 | 2342 | /* Send the command for reading device ID */ |
ace4dfee | 2343 | chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); |
1da177e4 | 2344 | /* Read manufacturer and device IDs */ |
ace4dfee TG |
2345 | if (nand_maf_id != chip->read_byte(mtd) || |
2346 | type->id != chip->read_byte(mtd)) | |
1da177e4 LT |
2347 | break; |
2348 | } | |
2349 | if (i > 1) | |
2350 | printk(KERN_INFO "%d NAND chips detected\n", i); | |
61b03bd7 | 2351 | |
1da177e4 | 2352 | /* Store the number of chips and calc total size for mtd */ |
ace4dfee TG |
2353 | chip->numchips = i; |
2354 | mtd->size = i * chip->chipsize; | |
7aa65bfd | 2355 | |
f75e5097 TG |
2356 | /* Preset the internal oob write buffer */ |
2357 | memset(chip->buffers.oobwbuf, 0xff, mtd->oobsize); | |
1da177e4 | 2358 | |
7aa65bfd TG |
2359 | /* |
2360 | * If no default placement scheme is given, select an appropriate one | |
2361 | */ | |
5bd34c09 | 2362 | if (!chip->ecc.layout) { |
61b03bd7 | 2363 | switch (mtd->oobsize) { |
1da177e4 | 2364 | case 8: |
5bd34c09 | 2365 | chip->ecc.layout = &nand_oob_8; |
1da177e4 LT |
2366 | break; |
2367 | case 16: | |
5bd34c09 | 2368 | chip->ecc.layout = &nand_oob_16; |
1da177e4 LT |
2369 | break; |
2370 | case 64: | |
5bd34c09 | 2371 | chip->ecc.layout = &nand_oob_64; |
1da177e4 LT |
2372 | break; |
2373 | default: | |
7aa65bfd TG |
2374 | printk(KERN_WARNING "No oob scheme defined for " |
2375 | "oobsize %d\n", mtd->oobsize); | |
1da177e4 LT |
2376 | BUG(); |
2377 | } | |
2378 | } | |
61b03bd7 | 2379 | |
61b03bd7 | 2380 | /* |
7aa65bfd TG |
2381 | * check ECC mode, default to software if 3byte/512byte hardware ECC is |
2382 | * selected and we have 256 byte pagesize fallback to software ECC | |
e0c7d767 | 2383 | */ |
ace4dfee | 2384 | switch (chip->ecc.mode) { |
6dfc6d25 | 2385 | case NAND_ECC_HW: |
f5bbdacc TG |
2386 | /* Use standard hwecc read page function ? */ |
2387 | if (!chip->ecc.read_page) | |
2388 | chip->ecc.read_page = nand_read_page_hwecc; | |
f75e5097 TG |
2389 | if (!chip->ecc.write_page) |
2390 | chip->ecc.write_page = nand_write_page_hwecc; | |
7bc3312b TG |
2391 | if (!chip->ecc.read_oob) |
2392 | chip->ecc.read_oob = nand_read_oob_std; | |
2393 | if (!chip->ecc.write_oob) | |
2394 | chip->ecc.write_oob = nand_write_oob_std; | |
f5bbdacc | 2395 | |
6dfc6d25 | 2396 | case NAND_ECC_HW_SYNDROME: |
ace4dfee TG |
2397 | if (!chip->ecc.calculate || !chip->ecc.correct || |
2398 | !chip->ecc.hwctl) { | |
6dfc6d25 TG |
2399 | printk(KERN_WARNING "No ECC functions supplied, " |
2400 | "Hardware ECC not possible\n"); | |
2401 | BUG(); | |
2402 | } | |
f75e5097 | 2403 | /* Use standard syndrome read/write page function ? */ |
f5bbdacc TG |
2404 | if (!chip->ecc.read_page) |
2405 | chip->ecc.read_page = nand_read_page_syndrome; | |
f75e5097 TG |
2406 | if (!chip->ecc.write_page) |
2407 | chip->ecc.write_page = nand_write_page_syndrome; | |
7bc3312b TG |
2408 | if (!chip->ecc.read_oob) |
2409 | chip->ecc.read_oob = nand_read_oob_syndrome; | |
2410 | if (!chip->ecc.write_oob) | |
2411 | chip->ecc.write_oob = nand_write_oob_syndrome; | |
f5bbdacc | 2412 | |
ace4dfee | 2413 | if (mtd->writesize >= chip->ecc.size) |
6dfc6d25 TG |
2414 | break; |
2415 | printk(KERN_WARNING "%d byte HW ECC not possible on " | |
2416 | "%d byte page size, fallback to SW ECC\n", | |
ace4dfee TG |
2417 | chip->ecc.size, mtd->writesize); |
2418 | chip->ecc.mode = NAND_ECC_SOFT; | |
61b03bd7 | 2419 | |
6dfc6d25 | 2420 | case NAND_ECC_SOFT: |
ace4dfee TG |
2421 | chip->ecc.calculate = nand_calculate_ecc; |
2422 | chip->ecc.correct = nand_correct_data; | |
f5bbdacc | 2423 | chip->ecc.read_page = nand_read_page_swecc; |
f75e5097 | 2424 | chip->ecc.write_page = nand_write_page_swecc; |
7bc3312b TG |
2425 | chip->ecc.read_oob = nand_read_oob_std; |
2426 | chip->ecc.write_oob = nand_write_oob_std; | |
ace4dfee TG |
2427 | chip->ecc.size = 256; |
2428 | chip->ecc.bytes = 3; | |
1da177e4 | 2429 | break; |
61b03bd7 TG |
2430 | |
2431 | case NAND_ECC_NONE: | |
7aa65bfd TG |
2432 | printk(KERN_WARNING "NAND_ECC_NONE selected by board driver. " |
2433 | "This is not recommended !!\n"); | |
8593fbc6 TG |
2434 | chip->ecc.read_page = nand_read_page_raw; |
2435 | chip->ecc.write_page = nand_write_page_raw; | |
7bc3312b TG |
2436 | chip->ecc.read_oob = nand_read_oob_std; |
2437 | chip->ecc.write_oob = nand_write_oob_std; | |
ace4dfee TG |
2438 | chip->ecc.size = mtd->writesize; |
2439 | chip->ecc.bytes = 0; | |
1da177e4 | 2440 | break; |
1da177e4 | 2441 | default: |
7aa65bfd | 2442 | printk(KERN_WARNING "Invalid NAND_ECC_MODE %d\n", |
ace4dfee | 2443 | chip->ecc.mode); |
61b03bd7 | 2444 | BUG(); |
1da177e4 | 2445 | } |
61b03bd7 | 2446 | |
5bd34c09 TG |
2447 | /* |
2448 | * The number of bytes available for a client to place data into | |
2449 | * the out of band area | |
2450 | */ | |
2451 | chip->ecc.layout->oobavail = 0; | |
2452 | for (i = 0; chip->ecc.layout->oobfree[i].length; i++) | |
2453 | chip->ecc.layout->oobavail += | |
2454 | chip->ecc.layout->oobfree[i].length; | |
2455 | ||
7aa65bfd TG |
2456 | /* |
2457 | * Set the number of read / write steps for one page depending on ECC | |
2458 | * mode | |
2459 | */ | |
ace4dfee TG |
2460 | chip->ecc.steps = mtd->writesize / chip->ecc.size; |
2461 | if(chip->ecc.steps * chip->ecc.size != mtd->writesize) { | |
6dfc6d25 TG |
2462 | printk(KERN_WARNING "Invalid ecc parameters\n"); |
2463 | BUG(); | |
1da177e4 | 2464 | } |
f5bbdacc | 2465 | chip->ecc.total = chip->ecc.steps * chip->ecc.bytes; |
61b03bd7 | 2466 | |
04bbd0ea | 2467 | /* Initialize state */ |
ace4dfee | 2468 | chip->state = FL_READY; |
1da177e4 LT |
2469 | |
2470 | /* De-select the device */ | |
ace4dfee | 2471 | chip->select_chip(mtd, -1); |
1da177e4 LT |
2472 | |
2473 | /* Invalidate the pagebuffer reference */ | |
ace4dfee | 2474 | chip->pagebuf = -1; |
1da177e4 LT |
2475 | |
2476 | /* Fill in remaining MTD driver data */ | |
2477 | mtd->type = MTD_NANDFLASH; | |
5fa43394 | 2478 | mtd->flags = MTD_CAP_NANDFLASH; |
1da177e4 LT |
2479 | mtd->ecctype = MTD_ECC_SW; |
2480 | mtd->erase = nand_erase; | |
2481 | mtd->point = NULL; | |
2482 | mtd->unpoint = NULL; | |
2483 | mtd->read = nand_read; | |
2484 | mtd->write = nand_write; | |
1da177e4 LT |
2485 | mtd->read_oob = nand_read_oob; |
2486 | mtd->write_oob = nand_write_oob; | |
1da177e4 LT |
2487 | mtd->sync = nand_sync; |
2488 | mtd->lock = NULL; | |
2489 | mtd->unlock = NULL; | |
962034f4 VW |
2490 | mtd->suspend = nand_suspend; |
2491 | mtd->resume = nand_resume; | |
1da177e4 LT |
2492 | mtd->block_isbad = nand_block_isbad; |
2493 | mtd->block_markbad = nand_block_markbad; | |
2494 | ||
5bd34c09 TG |
2495 | /* propagate ecc.layout to mtd_info */ |
2496 | mtd->ecclayout = chip->ecc.layout; | |
1da177e4 | 2497 | |
0040bf38 | 2498 | /* Check, if we should skip the bad block table scan */ |
ace4dfee | 2499 | if (chip->options & NAND_SKIP_BBTSCAN) |
0040bf38 | 2500 | return 0; |
1da177e4 LT |
2501 | |
2502 | /* Build bad block table */ | |
ace4dfee | 2503 | return chip->scan_bbt(mtd); |
1da177e4 LT |
2504 | } |
2505 | ||
2506 | /** | |
61b03bd7 | 2507 | * nand_release - [NAND Interface] Free resources held by the NAND device |
1da177e4 LT |
2508 | * @mtd: MTD device structure |
2509 | */ | |
e0c7d767 | 2510 | void nand_release(struct mtd_info *mtd) |
1da177e4 | 2511 | { |
ace4dfee | 2512 | struct nand_chip *chip = mtd->priv; |
1da177e4 LT |
2513 | |
2514 | #ifdef CONFIG_MTD_PARTITIONS | |
2515 | /* Deregister partitions */ | |
e0c7d767 | 2516 | del_mtd_partitions(mtd); |
1da177e4 LT |
2517 | #endif |
2518 | /* Deregister the device */ | |
e0c7d767 | 2519 | del_mtd_device(mtd); |
1da177e4 | 2520 | |
fa671646 | 2521 | /* Free bad block table memory */ |
ace4dfee | 2522 | kfree(chip->bbt); |
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"); |