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7529df46 PP |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Copyright (C) 2016-2017 Micron Technology, Inc. | |
4 | * | |
5 | * Authors: | |
6 | * Peter Pan <peterpandong@micron.com> | |
7 | * Boris Brezillon <boris.brezillon@bootlin.com> | |
8 | */ | |
9 | ||
10 | #define pr_fmt(fmt) "spi-nand: " fmt | |
11 | ||
12 | #include <linux/device.h> | |
13 | #include <linux/jiffies.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/mtd/spinand.h> | |
17 | #include <linux/of.h> | |
18 | #include <linux/slab.h> | |
f1541773 | 19 | #include <linux/string.h> |
7529df46 PP |
20 | #include <linux/spi/spi.h> |
21 | #include <linux/spi/spi-mem.h> | |
22 | ||
7529df46 PP |
23 | static int spinand_read_reg_op(struct spinand_device *spinand, u8 reg, u8 *val) |
24 | { | |
25 | struct spi_mem_op op = SPINAND_GET_FEATURE_OP(reg, | |
26 | spinand->scratchbuf); | |
27 | int ret; | |
28 | ||
29 | ret = spi_mem_exec_op(spinand->spimem, &op); | |
30 | if (ret) | |
31 | return ret; | |
32 | ||
33 | *val = *spinand->scratchbuf; | |
34 | return 0; | |
35 | } | |
36 | ||
37 | static int spinand_write_reg_op(struct spinand_device *spinand, u8 reg, u8 val) | |
38 | { | |
39 | struct spi_mem_op op = SPINAND_SET_FEATURE_OP(reg, | |
40 | spinand->scratchbuf); | |
41 | ||
42 | *spinand->scratchbuf = val; | |
43 | return spi_mem_exec_op(spinand->spimem, &op); | |
44 | } | |
45 | ||
46 | static int spinand_read_status(struct spinand_device *spinand, u8 *status) | |
47 | { | |
48 | return spinand_read_reg_op(spinand, REG_STATUS, status); | |
49 | } | |
50 | ||
51 | static int spinand_get_cfg(struct spinand_device *spinand, u8 *cfg) | |
52 | { | |
53 | struct nand_device *nand = spinand_to_nand(spinand); | |
54 | ||
55 | if (WARN_ON(spinand->cur_target < 0 || | |
56 | spinand->cur_target >= nand->memorg.ntargets)) | |
57 | return -EINVAL; | |
58 | ||
59 | *cfg = spinand->cfg_cache[spinand->cur_target]; | |
60 | return 0; | |
61 | } | |
62 | ||
63 | static int spinand_set_cfg(struct spinand_device *spinand, u8 cfg) | |
64 | { | |
65 | struct nand_device *nand = spinand_to_nand(spinand); | |
66 | int ret; | |
67 | ||
68 | if (WARN_ON(spinand->cur_target < 0 || | |
69 | spinand->cur_target >= nand->memorg.ntargets)) | |
70 | return -EINVAL; | |
71 | ||
72 | if (spinand->cfg_cache[spinand->cur_target] == cfg) | |
73 | return 0; | |
74 | ||
75 | ret = spinand_write_reg_op(spinand, REG_CFG, cfg); | |
76 | if (ret) | |
77 | return ret; | |
78 | ||
79 | spinand->cfg_cache[spinand->cur_target] = cfg; | |
80 | return 0; | |
81 | } | |
82 | ||
83 | /** | |
84 | * spinand_upd_cfg() - Update the configuration register | |
85 | * @spinand: the spinand device | |
86 | * @mask: the mask encoding the bits to update in the config reg | |
87 | * @val: the new value to apply | |
88 | * | |
89 | * Update the configuration register. | |
90 | * | |
91 | * Return: 0 on success, a negative error code otherwise. | |
92 | */ | |
93 | int spinand_upd_cfg(struct spinand_device *spinand, u8 mask, u8 val) | |
94 | { | |
95 | int ret; | |
96 | u8 cfg; | |
97 | ||
98 | ret = spinand_get_cfg(spinand, &cfg); | |
99 | if (ret) | |
100 | return ret; | |
101 | ||
102 | cfg &= ~mask; | |
103 | cfg |= val; | |
104 | ||
105 | return spinand_set_cfg(spinand, cfg); | |
106 | } | |
107 | ||
108 | /** | |
109 | * spinand_select_target() - Select a specific NAND target/die | |
110 | * @spinand: the spinand device | |
111 | * @target: the target/die to select | |
112 | * | |
113 | * Select a new target/die. If chip only has one die, this function is a NOOP. | |
114 | * | |
115 | * Return: 0 on success, a negative error code otherwise. | |
116 | */ | |
117 | int spinand_select_target(struct spinand_device *spinand, unsigned int target) | |
118 | { | |
119 | struct nand_device *nand = spinand_to_nand(spinand); | |
120 | int ret; | |
121 | ||
122 | if (WARN_ON(target >= nand->memorg.ntargets)) | |
123 | return -EINVAL; | |
124 | ||
125 | if (spinand->cur_target == target) | |
126 | return 0; | |
127 | ||
128 | if (nand->memorg.ntargets == 1) { | |
129 | spinand->cur_target = target; | |
130 | return 0; | |
131 | } | |
132 | ||
133 | ret = spinand->select_target(spinand, target); | |
134 | if (ret) | |
135 | return ret; | |
136 | ||
137 | spinand->cur_target = target; | |
138 | return 0; | |
139 | } | |
140 | ||
141 | static int spinand_init_cfg_cache(struct spinand_device *spinand) | |
142 | { | |
143 | struct nand_device *nand = spinand_to_nand(spinand); | |
144 | struct device *dev = &spinand->spimem->spi->dev; | |
145 | unsigned int target; | |
146 | int ret; | |
147 | ||
148 | spinand->cfg_cache = devm_kcalloc(dev, | |
149 | nand->memorg.ntargets, | |
150 | sizeof(*spinand->cfg_cache), | |
151 | GFP_KERNEL); | |
152 | if (!spinand->cfg_cache) | |
153 | return -ENOMEM; | |
154 | ||
155 | for (target = 0; target < nand->memorg.ntargets; target++) { | |
156 | ret = spinand_select_target(spinand, target); | |
157 | if (ret) | |
158 | return ret; | |
159 | ||
160 | /* | |
161 | * We use spinand_read_reg_op() instead of spinand_get_cfg() | |
162 | * here to bypass the config cache. | |
163 | */ | |
164 | ret = spinand_read_reg_op(spinand, REG_CFG, | |
165 | &spinand->cfg_cache[target]); | |
166 | if (ret) | |
167 | return ret; | |
168 | } | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
173 | static int spinand_init_quad_enable(struct spinand_device *spinand) | |
174 | { | |
175 | bool enable = false; | |
176 | ||
177 | if (!(spinand->flags & SPINAND_HAS_QE_BIT)) | |
178 | return 0; | |
179 | ||
180 | if (spinand->op_templates.read_cache->data.buswidth == 4 || | |
181 | spinand->op_templates.write_cache->data.buswidth == 4 || | |
182 | spinand->op_templates.update_cache->data.buswidth == 4) | |
183 | enable = true; | |
184 | ||
185 | return spinand_upd_cfg(spinand, CFG_QUAD_ENABLE, | |
186 | enable ? CFG_QUAD_ENABLE : 0); | |
187 | } | |
188 | ||
189 | static int spinand_ecc_enable(struct spinand_device *spinand, | |
190 | bool enable) | |
191 | { | |
192 | return spinand_upd_cfg(spinand, CFG_ECC_ENABLE, | |
193 | enable ? CFG_ECC_ENABLE : 0); | |
194 | } | |
195 | ||
196 | static int spinand_write_enable_op(struct spinand_device *spinand) | |
197 | { | |
198 | struct spi_mem_op op = SPINAND_WR_EN_DIS_OP(true); | |
199 | ||
200 | return spi_mem_exec_op(spinand->spimem, &op); | |
201 | } | |
202 | ||
203 | static int spinand_load_page_op(struct spinand_device *spinand, | |
204 | const struct nand_page_io_req *req) | |
205 | { | |
206 | struct nand_device *nand = spinand_to_nand(spinand); | |
207 | unsigned int row = nanddev_pos_to_row(nand, &req->pos); | |
208 | struct spi_mem_op op = SPINAND_PAGE_READ_OP(row); | |
209 | ||
210 | return spi_mem_exec_op(spinand->spimem, &op); | |
211 | } | |
212 | ||
213 | static int spinand_read_from_cache_op(struct spinand_device *spinand, | |
214 | const struct nand_page_io_req *req) | |
215 | { | |
7529df46 PP |
216 | struct nand_device *nand = spinand_to_nand(spinand); |
217 | struct mtd_info *mtd = nanddev_to_mtd(nand); | |
981d1aa0 | 218 | struct spi_mem_dirmap_desc *rdesc; |
7529df46 PP |
219 | unsigned int nbytes = 0; |
220 | void *buf = NULL; | |
221 | u16 column = 0; | |
981d1aa0 | 222 | ssize_t ret; |
7529df46 PP |
223 | |
224 | if (req->datalen) { | |
7529df46 | 225 | buf = spinand->databuf; |
981d1aa0 BB |
226 | nbytes = nanddev_page_size(nand); |
227 | column = 0; | |
7529df46 PP |
228 | } |
229 | ||
230 | if (req->ooblen) { | |
7529df46 PP |
231 | nbytes += nanddev_per_page_oobsize(nand); |
232 | if (!buf) { | |
233 | buf = spinand->oobbuf; | |
234 | column = nanddev_page_size(nand); | |
235 | } | |
236 | } | |
237 | ||
981d1aa0 | 238 | rdesc = spinand->dirmaps[req->pos.plane].rdesc; |
7529df46 | 239 | |
7529df46 | 240 | while (nbytes) { |
981d1aa0 BB |
241 | ret = spi_mem_dirmap_read(rdesc, column, nbytes, buf); |
242 | if (ret < 0) | |
7529df46 PP |
243 | return ret; |
244 | ||
981d1aa0 BB |
245 | if (!ret || ret > nbytes) |
246 | return -EIO; | |
7529df46 | 247 | |
981d1aa0 BB |
248 | nbytes -= ret; |
249 | column += ret; | |
250 | buf += ret; | |
7529df46 PP |
251 | } |
252 | ||
253 | if (req->datalen) | |
254 | memcpy(req->databuf.in, spinand->databuf + req->dataoffs, | |
255 | req->datalen); | |
256 | ||
257 | if (req->ooblen) { | |
258 | if (req->mode == MTD_OPS_AUTO_OOB) | |
259 | mtd_ooblayout_get_databytes(mtd, req->oobbuf.in, | |
260 | spinand->oobbuf, | |
261 | req->ooboffs, | |
262 | req->ooblen); | |
263 | else | |
264 | memcpy(req->oobbuf.in, spinand->oobbuf + req->ooboffs, | |
265 | req->ooblen); | |
266 | } | |
267 | ||
268 | return 0; | |
269 | } | |
270 | ||
271 | static int spinand_write_to_cache_op(struct spinand_device *spinand, | |
272 | const struct nand_page_io_req *req) | |
273 | { | |
7529df46 PP |
274 | struct nand_device *nand = spinand_to_nand(spinand); |
275 | struct mtd_info *mtd = nanddev_to_mtd(nand); | |
981d1aa0 BB |
276 | struct spi_mem_dirmap_desc *wdesc; |
277 | unsigned int nbytes, column = 0; | |
13c15e07 | 278 | void *buf = spinand->databuf; |
981d1aa0 | 279 | ssize_t ret; |
7529df46 | 280 | |
13c15e07 BB |
281 | /* |
282 | * Looks like PROGRAM LOAD (AKA write cache) does not necessarily reset | |
283 | * the cache content to 0xFF (depends on vendor implementation), so we | |
284 | * must fill the page cache entirely even if we only want to program | |
285 | * the data portion of the page, otherwise we might corrupt the BBM or | |
286 | * user data previously programmed in OOB area. | |
287 | */ | |
288 | nbytes = nanddev_page_size(nand) + nanddev_per_page_oobsize(nand); | |
289 | memset(spinand->databuf, 0xff, nbytes); | |
7529df46 | 290 | |
13c15e07 | 291 | if (req->datalen) |
7529df46 PP |
292 | memcpy(spinand->databuf + req->dataoffs, req->databuf.out, |
293 | req->datalen); | |
7529df46 PP |
294 | |
295 | if (req->ooblen) { | |
296 | if (req->mode == MTD_OPS_AUTO_OOB) | |
297 | mtd_ooblayout_set_databytes(mtd, req->oobbuf.out, | |
298 | spinand->oobbuf, | |
299 | req->ooboffs, | |
300 | req->ooblen); | |
301 | else | |
302 | memcpy(spinand->oobbuf + req->ooboffs, req->oobbuf.out, | |
303 | req->ooblen); | |
7529df46 PP |
304 | } |
305 | ||
981d1aa0 | 306 | wdesc = spinand->dirmaps[req->pos.plane].wdesc; |
7529df46 | 307 | |
7529df46 | 308 | while (nbytes) { |
981d1aa0 BB |
309 | ret = spi_mem_dirmap_write(wdesc, column, nbytes, buf); |
310 | if (ret < 0) | |
7529df46 PP |
311 | return ret; |
312 | ||
981d1aa0 BB |
313 | if (!ret || ret > nbytes) |
314 | return -EIO; | |
7529df46 | 315 | |
981d1aa0 BB |
316 | nbytes -= ret; |
317 | column += ret; | |
318 | buf += ret; | |
7529df46 PP |
319 | } |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
324 | static int spinand_program_op(struct spinand_device *spinand, | |
325 | const struct nand_page_io_req *req) | |
326 | { | |
327 | struct nand_device *nand = spinand_to_nand(spinand); | |
328 | unsigned int row = nanddev_pos_to_row(nand, &req->pos); | |
329 | struct spi_mem_op op = SPINAND_PROG_EXEC_OP(row); | |
330 | ||
331 | return spi_mem_exec_op(spinand->spimem, &op); | |
332 | } | |
333 | ||
334 | static int spinand_erase_op(struct spinand_device *spinand, | |
335 | const struct nand_pos *pos) | |
336 | { | |
337 | struct nand_device *nand = spinand_to_nand(spinand); | |
338 | unsigned int row = nanddev_pos_to_row(nand, pos); | |
339 | struct spi_mem_op op = SPINAND_BLK_ERASE_OP(row); | |
340 | ||
341 | return spi_mem_exec_op(spinand->spimem, &op); | |
342 | } | |
343 | ||
344 | static int spinand_wait(struct spinand_device *spinand, u8 *s) | |
345 | { | |
346 | unsigned long timeo = jiffies + msecs_to_jiffies(400); | |
347 | u8 status; | |
348 | int ret; | |
349 | ||
350 | do { | |
351 | ret = spinand_read_status(spinand, &status); | |
352 | if (ret) | |
353 | return ret; | |
354 | ||
355 | if (!(status & STATUS_BUSY)) | |
356 | goto out; | |
357 | } while (time_before(jiffies, timeo)); | |
358 | ||
359 | /* | |
360 | * Extra read, just in case the STATUS_READY bit has changed | |
361 | * since our last check | |
362 | */ | |
363 | ret = spinand_read_status(spinand, &status); | |
364 | if (ret) | |
365 | return ret; | |
366 | ||
367 | out: | |
368 | if (s) | |
369 | *s = status; | |
370 | ||
371 | return status & STATUS_BUSY ? -ETIMEDOUT : 0; | |
372 | } | |
373 | ||
f1541773 CG |
374 | static int spinand_read_id_op(struct spinand_device *spinand, u8 naddr, |
375 | u8 ndummy, u8 *buf) | |
7529df46 | 376 | { |
f1541773 CG |
377 | struct spi_mem_op op = SPINAND_READID_OP( |
378 | naddr, ndummy, spinand->scratchbuf, SPINAND_MAX_ID_LEN); | |
7529df46 PP |
379 | int ret; |
380 | ||
381 | ret = spi_mem_exec_op(spinand->spimem, &op); | |
382 | if (!ret) | |
383 | memcpy(buf, spinand->scratchbuf, SPINAND_MAX_ID_LEN); | |
384 | ||
385 | return ret; | |
386 | } | |
387 | ||
388 | static int spinand_reset_op(struct spinand_device *spinand) | |
389 | { | |
390 | struct spi_mem_op op = SPINAND_RESET_OP; | |
391 | int ret; | |
392 | ||
393 | ret = spi_mem_exec_op(spinand->spimem, &op); | |
394 | if (ret) | |
395 | return ret; | |
396 | ||
397 | return spinand_wait(spinand, NULL); | |
398 | } | |
399 | ||
400 | static int spinand_lock_block(struct spinand_device *spinand, u8 lock) | |
401 | { | |
402 | return spinand_write_reg_op(spinand, REG_BLOCK_LOCK, lock); | |
403 | } | |
404 | ||
405 | static int spinand_check_ecc_status(struct spinand_device *spinand, u8 status) | |
406 | { | |
407 | struct nand_device *nand = spinand_to_nand(spinand); | |
408 | ||
409 | if (spinand->eccinfo.get_status) | |
410 | return spinand->eccinfo.get_status(spinand, status); | |
411 | ||
412 | switch (status & STATUS_ECC_MASK) { | |
413 | case STATUS_ECC_NO_BITFLIPS: | |
414 | return 0; | |
415 | ||
416 | case STATUS_ECC_HAS_BITFLIPS: | |
417 | /* | |
418 | * We have no way to know exactly how many bitflips have been | |
419 | * fixed, so let's return the maximum possible value so that | |
420 | * wear-leveling layers move the data immediately. | |
421 | */ | |
422 | return nand->eccreq.strength; | |
423 | ||
424 | case STATUS_ECC_UNCOR_ERROR: | |
425 | return -EBADMSG; | |
426 | ||
427 | default: | |
428 | break; | |
429 | } | |
430 | ||
431 | return -EINVAL; | |
432 | } | |
433 | ||
434 | static int spinand_read_page(struct spinand_device *spinand, | |
435 | const struct nand_page_io_req *req, | |
436 | bool ecc_enabled) | |
437 | { | |
438 | u8 status; | |
439 | int ret; | |
440 | ||
441 | ret = spinand_load_page_op(spinand, req); | |
442 | if (ret) | |
443 | return ret; | |
444 | ||
445 | ret = spinand_wait(spinand, &status); | |
446 | if (ret < 0) | |
447 | return ret; | |
448 | ||
449 | ret = spinand_read_from_cache_op(spinand, req); | |
450 | if (ret) | |
451 | return ret; | |
452 | ||
453 | if (!ecc_enabled) | |
454 | return 0; | |
455 | ||
456 | return spinand_check_ecc_status(spinand, status); | |
457 | } | |
458 | ||
459 | static int spinand_write_page(struct spinand_device *spinand, | |
460 | const struct nand_page_io_req *req) | |
461 | { | |
462 | u8 status; | |
463 | int ret; | |
464 | ||
465 | ret = spinand_write_enable_op(spinand); | |
466 | if (ret) | |
467 | return ret; | |
468 | ||
469 | ret = spinand_write_to_cache_op(spinand, req); | |
470 | if (ret) | |
471 | return ret; | |
472 | ||
473 | ret = spinand_program_op(spinand, req); | |
474 | if (ret) | |
475 | return ret; | |
476 | ||
477 | ret = spinand_wait(spinand, &status); | |
478 | if (!ret && (status & STATUS_PROG_FAILED)) | |
479 | ret = -EIO; | |
480 | ||
481 | return ret; | |
482 | } | |
483 | ||
484 | static int spinand_mtd_read(struct mtd_info *mtd, loff_t from, | |
485 | struct mtd_oob_ops *ops) | |
486 | { | |
487 | struct spinand_device *spinand = mtd_to_spinand(mtd); | |
488 | struct nand_device *nand = mtd_to_nanddev(mtd); | |
489 | unsigned int max_bitflips = 0; | |
490 | struct nand_io_iter iter; | |
491 | bool enable_ecc = false; | |
492 | bool ecc_failed = false; | |
493 | int ret = 0; | |
494 | ||
495 | if (ops->mode != MTD_OPS_RAW && spinand->eccinfo.ooblayout) | |
496 | enable_ecc = true; | |
497 | ||
498 | mutex_lock(&spinand->lock); | |
499 | ||
500 | nanddev_io_for_each_page(nand, from, ops, &iter) { | |
501 | ret = spinand_select_target(spinand, iter.req.pos.target); | |
502 | if (ret) | |
503 | break; | |
504 | ||
505 | ret = spinand_ecc_enable(spinand, enable_ecc); | |
506 | if (ret) | |
507 | break; | |
508 | ||
509 | ret = spinand_read_page(spinand, &iter.req, enable_ecc); | |
510 | if (ret < 0 && ret != -EBADMSG) | |
511 | break; | |
512 | ||
513 | if (ret == -EBADMSG) { | |
514 | ecc_failed = true; | |
515 | mtd->ecc_stats.failed++; | |
7529df46 PP |
516 | } else { |
517 | mtd->ecc_stats.corrected += ret; | |
518 | max_bitflips = max_t(unsigned int, max_bitflips, ret); | |
519 | } | |
520 | ||
b83408b5 | 521 | ret = 0; |
7529df46 PP |
522 | ops->retlen += iter.req.datalen; |
523 | ops->oobretlen += iter.req.ooblen; | |
524 | } | |
525 | ||
526 | mutex_unlock(&spinand->lock); | |
527 | ||
528 | if (ecc_failed && !ret) | |
529 | ret = -EBADMSG; | |
530 | ||
531 | return ret ? ret : max_bitflips; | |
532 | } | |
533 | ||
534 | static int spinand_mtd_write(struct mtd_info *mtd, loff_t to, | |
535 | struct mtd_oob_ops *ops) | |
536 | { | |
537 | struct spinand_device *spinand = mtd_to_spinand(mtd); | |
538 | struct nand_device *nand = mtd_to_nanddev(mtd); | |
539 | struct nand_io_iter iter; | |
540 | bool enable_ecc = false; | |
541 | int ret = 0; | |
542 | ||
543 | if (ops->mode != MTD_OPS_RAW && mtd->ooblayout) | |
544 | enable_ecc = true; | |
545 | ||
546 | mutex_lock(&spinand->lock); | |
547 | ||
548 | nanddev_io_for_each_page(nand, to, ops, &iter) { | |
549 | ret = spinand_select_target(spinand, iter.req.pos.target); | |
550 | if (ret) | |
551 | break; | |
552 | ||
553 | ret = spinand_ecc_enable(spinand, enable_ecc); | |
554 | if (ret) | |
555 | break; | |
556 | ||
557 | ret = spinand_write_page(spinand, &iter.req); | |
558 | if (ret) | |
559 | break; | |
560 | ||
561 | ops->retlen += iter.req.datalen; | |
562 | ops->oobretlen += iter.req.ooblen; | |
563 | } | |
564 | ||
565 | mutex_unlock(&spinand->lock); | |
566 | ||
567 | return ret; | |
568 | } | |
569 | ||
570 | static bool spinand_isbad(struct nand_device *nand, const struct nand_pos *pos) | |
571 | { | |
572 | struct spinand_device *spinand = nand_to_spinand(nand); | |
21489375 | 573 | u8 marker[2] = { }; |
7529df46 PP |
574 | struct nand_page_io_req req = { |
575 | .pos = *pos, | |
21489375 | 576 | .ooblen = sizeof(marker), |
7529df46 | 577 | .ooboffs = 0, |
21489375 | 578 | .oobbuf.in = marker, |
7529df46 PP |
579 | .mode = MTD_OPS_RAW, |
580 | }; | |
581 | ||
7529df46 PP |
582 | spinand_select_target(spinand, pos->target); |
583 | spinand_read_page(spinand, &req, false); | |
21489375 | 584 | if (marker[0] != 0xff || marker[1] != 0xff) |
7529df46 PP |
585 | return true; |
586 | ||
587 | return false; | |
588 | } | |
589 | ||
590 | static int spinand_mtd_block_isbad(struct mtd_info *mtd, loff_t offs) | |
591 | { | |
592 | struct nand_device *nand = mtd_to_nanddev(mtd); | |
593 | struct spinand_device *spinand = nand_to_spinand(nand); | |
594 | struct nand_pos pos; | |
595 | int ret; | |
596 | ||
597 | nanddev_offs_to_pos(nand, offs, &pos); | |
598 | mutex_lock(&spinand->lock); | |
599 | ret = nanddev_isbad(nand, &pos); | |
600 | mutex_unlock(&spinand->lock); | |
601 | ||
602 | return ret; | |
603 | } | |
604 | ||
605 | static int spinand_markbad(struct nand_device *nand, const struct nand_pos *pos) | |
606 | { | |
607 | struct spinand_device *spinand = nand_to_spinand(nand); | |
21489375 | 608 | u8 marker[2] = { }; |
7529df46 PP |
609 | struct nand_page_io_req req = { |
610 | .pos = *pos, | |
611 | .ooboffs = 0, | |
21489375 FS |
612 | .ooblen = sizeof(marker), |
613 | .oobbuf.out = marker, | |
621a7b78 | 614 | .mode = MTD_OPS_RAW, |
7529df46 PP |
615 | }; |
616 | int ret; | |
617 | ||
7529df46 PP |
618 | ret = spinand_select_target(spinand, pos->target); |
619 | if (ret) | |
620 | return ret; | |
621 | ||
622 | ret = spinand_write_enable_op(spinand); | |
623 | if (ret) | |
624 | return ret; | |
625 | ||
7529df46 PP |
626 | return spinand_write_page(spinand, &req); |
627 | } | |
628 | ||
629 | static int spinand_mtd_block_markbad(struct mtd_info *mtd, loff_t offs) | |
630 | { | |
631 | struct nand_device *nand = mtd_to_nanddev(mtd); | |
632 | struct spinand_device *spinand = nand_to_spinand(nand); | |
633 | struct nand_pos pos; | |
634 | int ret; | |
635 | ||
636 | nanddev_offs_to_pos(nand, offs, &pos); | |
637 | mutex_lock(&spinand->lock); | |
638 | ret = nanddev_markbad(nand, &pos); | |
639 | mutex_unlock(&spinand->lock); | |
640 | ||
641 | return ret; | |
642 | } | |
643 | ||
644 | static int spinand_erase(struct nand_device *nand, const struct nand_pos *pos) | |
645 | { | |
646 | struct spinand_device *spinand = nand_to_spinand(nand); | |
647 | u8 status; | |
648 | int ret; | |
649 | ||
650 | ret = spinand_select_target(spinand, pos->target); | |
651 | if (ret) | |
652 | return ret; | |
653 | ||
654 | ret = spinand_write_enable_op(spinand); | |
655 | if (ret) | |
656 | return ret; | |
657 | ||
658 | ret = spinand_erase_op(spinand, pos); | |
659 | if (ret) | |
660 | return ret; | |
661 | ||
662 | ret = spinand_wait(spinand, &status); | |
663 | if (!ret && (status & STATUS_ERASE_FAILED)) | |
664 | ret = -EIO; | |
665 | ||
666 | return ret; | |
667 | } | |
668 | ||
669 | static int spinand_mtd_erase(struct mtd_info *mtd, | |
670 | struct erase_info *einfo) | |
671 | { | |
672 | struct spinand_device *spinand = mtd_to_spinand(mtd); | |
673 | int ret; | |
674 | ||
675 | mutex_lock(&spinand->lock); | |
676 | ret = nanddev_mtd_erase(mtd, einfo); | |
677 | mutex_unlock(&spinand->lock); | |
678 | ||
679 | return ret; | |
680 | } | |
681 | ||
682 | static int spinand_mtd_block_isreserved(struct mtd_info *mtd, loff_t offs) | |
683 | { | |
684 | struct spinand_device *spinand = mtd_to_spinand(mtd); | |
685 | struct nand_device *nand = mtd_to_nanddev(mtd); | |
686 | struct nand_pos pos; | |
687 | int ret; | |
688 | ||
689 | nanddev_offs_to_pos(nand, offs, &pos); | |
690 | mutex_lock(&spinand->lock); | |
691 | ret = nanddev_isreserved(nand, &pos); | |
692 | mutex_unlock(&spinand->lock); | |
693 | ||
694 | return ret; | |
695 | } | |
696 | ||
981d1aa0 BB |
697 | static int spinand_create_dirmap(struct spinand_device *spinand, |
698 | unsigned int plane) | |
699 | { | |
700 | struct nand_device *nand = spinand_to_nand(spinand); | |
701 | struct spi_mem_dirmap_info info = { | |
702 | .length = nanddev_page_size(nand) + | |
703 | nanddev_per_page_oobsize(nand), | |
704 | }; | |
705 | struct spi_mem_dirmap_desc *desc; | |
706 | ||
707 | /* The plane number is passed in MSB just above the column address */ | |
708 | info.offset = plane << fls(nand->memorg.pagesize); | |
709 | ||
710 | info.op_tmpl = *spinand->op_templates.update_cache; | |
711 | desc = devm_spi_mem_dirmap_create(&spinand->spimem->spi->dev, | |
712 | spinand->spimem, &info); | |
713 | if (IS_ERR(desc)) | |
714 | return PTR_ERR(desc); | |
715 | ||
716 | spinand->dirmaps[plane].wdesc = desc; | |
717 | ||
718 | info.op_tmpl = *spinand->op_templates.read_cache; | |
719 | desc = devm_spi_mem_dirmap_create(&spinand->spimem->spi->dev, | |
720 | spinand->spimem, &info); | |
721 | if (IS_ERR(desc)) | |
722 | return PTR_ERR(desc); | |
723 | ||
724 | spinand->dirmaps[plane].rdesc = desc; | |
725 | ||
726 | return 0; | |
727 | } | |
728 | ||
729 | static int spinand_create_dirmaps(struct spinand_device *spinand) | |
730 | { | |
731 | struct nand_device *nand = spinand_to_nand(spinand); | |
732 | int i, ret; | |
733 | ||
734 | spinand->dirmaps = devm_kzalloc(&spinand->spimem->spi->dev, | |
735 | sizeof(*spinand->dirmaps) * | |
736 | nand->memorg.planes_per_lun, | |
737 | GFP_KERNEL); | |
738 | if (!spinand->dirmaps) | |
739 | return -ENOMEM; | |
740 | ||
741 | for (i = 0; i < nand->memorg.planes_per_lun; i++) { | |
742 | ret = spinand_create_dirmap(spinand, i); | |
743 | if (ret) | |
744 | return ret; | |
745 | } | |
746 | ||
747 | return 0; | |
748 | } | |
749 | ||
7529df46 PP |
750 | static const struct nand_ops spinand_ops = { |
751 | .erase = spinand_erase, | |
752 | .markbad = spinand_markbad, | |
753 | .isbad = spinand_isbad, | |
754 | }; | |
755 | ||
a508e887 | 756 | static const struct spinand_manufacturer *spinand_manufacturers[] = { |
c93c6132 | 757 | &gigadevice_spinand_manufacturer, |
b02308af | 758 | ¯onix_spinand_manufacturer, |
a508e887 | 759 | µn_spinand_manufacturer, |
35526916 | 760 | ¶gon_spinand_manufacturer, |
10949af1 | 761 | &toshiba_spinand_manufacturer, |
1075492b | 762 | &winbond_spinand_manufacturer, |
a508e887 PP |
763 | }; |
764 | ||
f1541773 CG |
765 | static int spinand_manufacturer_match(struct spinand_device *spinand, |
766 | enum spinand_readid_method rdid_method) | |
7529df46 | 767 | { |
f1541773 | 768 | u8 *id = spinand->id.data; |
a508e887 PP |
769 | unsigned int i; |
770 | int ret; | |
771 | ||
772 | for (i = 0; i < ARRAY_SIZE(spinand_manufacturers); i++) { | |
f1541773 CG |
773 | const struct spinand_manufacturer *manufacturer = |
774 | spinand_manufacturers[i]; | |
775 | ||
776 | if (id[0] != manufacturer->id) | |
777 | continue; | |
a508e887 | 778 | |
f1541773 CG |
779 | ret = spinand_match_and_init(spinand, |
780 | manufacturer->chips, | |
781 | manufacturer->nchips, | |
782 | rdid_method); | |
783 | if (ret < 0) | |
784 | continue; | |
785 | ||
786 | spinand->manufacturer = manufacturer; | |
787 | return 0; | |
788 | } | |
7529df46 PP |
789 | return -ENOTSUPP; |
790 | } | |
791 | ||
f1541773 CG |
792 | static int spinand_id_detect(struct spinand_device *spinand) |
793 | { | |
794 | u8 *id = spinand->id.data; | |
795 | int ret; | |
796 | ||
797 | ret = spinand_read_id_op(spinand, 0, 0, id); | |
798 | if (ret) | |
799 | return ret; | |
800 | ret = spinand_manufacturer_match(spinand, SPINAND_READID_METHOD_OPCODE); | |
801 | if (!ret) | |
802 | return 0; | |
803 | ||
804 | ret = spinand_read_id_op(spinand, 1, 0, id); | |
805 | if (ret) | |
806 | return ret; | |
807 | ret = spinand_manufacturer_match(spinand, | |
808 | SPINAND_READID_METHOD_OPCODE_ADDR); | |
809 | if (!ret) | |
810 | return 0; | |
811 | ||
812 | ret = spinand_read_id_op(spinand, 0, 1, id); | |
813 | if (ret) | |
814 | return ret; | |
815 | ret = spinand_manufacturer_match(spinand, | |
816 | SPINAND_READID_METHOD_OPCODE_DUMMY); | |
817 | ||
818 | return ret; | |
819 | } | |
820 | ||
7529df46 PP |
821 | static int spinand_manufacturer_init(struct spinand_device *spinand) |
822 | { | |
823 | if (spinand->manufacturer->ops->init) | |
824 | return spinand->manufacturer->ops->init(spinand); | |
825 | ||
826 | return 0; | |
827 | } | |
828 | ||
829 | static void spinand_manufacturer_cleanup(struct spinand_device *spinand) | |
830 | { | |
831 | /* Release manufacturer private data */ | |
832 | if (spinand->manufacturer->ops->cleanup) | |
833 | return spinand->manufacturer->ops->cleanup(spinand); | |
834 | } | |
835 | ||
836 | static const struct spi_mem_op * | |
837 | spinand_select_op_variant(struct spinand_device *spinand, | |
838 | const struct spinand_op_variants *variants) | |
839 | { | |
840 | struct nand_device *nand = spinand_to_nand(spinand); | |
841 | unsigned int i; | |
842 | ||
843 | for (i = 0; i < variants->nops; i++) { | |
844 | struct spi_mem_op op = variants->ops[i]; | |
845 | unsigned int nbytes; | |
846 | int ret; | |
847 | ||
848 | nbytes = nanddev_per_page_oobsize(nand) + | |
849 | nanddev_page_size(nand); | |
850 | ||
851 | while (nbytes) { | |
852 | op.data.nbytes = nbytes; | |
853 | ret = spi_mem_adjust_op_size(spinand->spimem, &op); | |
854 | if (ret) | |
855 | break; | |
856 | ||
857 | if (!spi_mem_supports_op(spinand->spimem, &op)) | |
858 | break; | |
859 | ||
860 | nbytes -= op.data.nbytes; | |
861 | } | |
862 | ||
863 | if (!nbytes) | |
864 | return &variants->ops[i]; | |
865 | } | |
866 | ||
867 | return NULL; | |
868 | } | |
869 | ||
870 | /** | |
871 | * spinand_match_and_init() - Try to find a match between a device ID and an | |
872 | * entry in a spinand_info table | |
873 | * @spinand: SPI NAND object | |
874 | * @table: SPI NAND device description table | |
875 | * @table_size: size of the device description table | |
f1541773 | 876 | * @rdid_method: read id method to match |
7529df46 | 877 | * |
f1541773 | 878 | * Match between a device ID retrieved through the READ_ID command and an |
7529df46 PP |
879 | * entry in the SPI NAND description table. If a match is found, the spinand |
880 | * object will be initialized with information provided by the matching | |
881 | * spinand_info entry. | |
882 | * | |
883 | * Return: 0 on success, a negative error code otherwise. | |
884 | */ | |
885 | int spinand_match_and_init(struct spinand_device *spinand, | |
886 | const struct spinand_info *table, | |
f1541773 CG |
887 | unsigned int table_size, |
888 | enum spinand_readid_method rdid_method) | |
7529df46 | 889 | { |
f1541773 | 890 | u8 *id = spinand->id.data; |
7529df46 PP |
891 | struct nand_device *nand = spinand_to_nand(spinand); |
892 | unsigned int i; | |
893 | ||
894 | for (i = 0; i < table_size; i++) { | |
895 | const struct spinand_info *info = &table[i]; | |
896 | const struct spi_mem_op *op; | |
897 | ||
f1541773 CG |
898 | if (rdid_method != info->devid.method) |
899 | continue; | |
900 | ||
901 | if (memcmp(id + 1, info->devid.id, info->devid.len)) | |
7529df46 PP |
902 | continue; |
903 | ||
904 | nand->memorg = table[i].memorg; | |
905 | nand->eccreq = table[i].eccreq; | |
906 | spinand->eccinfo = table[i].eccinfo; | |
907 | spinand->flags = table[i].flags; | |
f1541773 | 908 | spinand->id.len = 1 + table[i].devid.len; |
7529df46 PP |
909 | spinand->select_target = table[i].select_target; |
910 | ||
911 | op = spinand_select_op_variant(spinand, | |
912 | info->op_variants.read_cache); | |
913 | if (!op) | |
914 | return -ENOTSUPP; | |
915 | ||
916 | spinand->op_templates.read_cache = op; | |
917 | ||
918 | op = spinand_select_op_variant(spinand, | |
919 | info->op_variants.write_cache); | |
920 | if (!op) | |
921 | return -ENOTSUPP; | |
922 | ||
923 | spinand->op_templates.write_cache = op; | |
924 | ||
925 | op = spinand_select_op_variant(spinand, | |
926 | info->op_variants.update_cache); | |
927 | spinand->op_templates.update_cache = op; | |
928 | ||
929 | return 0; | |
930 | } | |
931 | ||
932 | return -ENOTSUPP; | |
933 | } | |
934 | ||
935 | static int spinand_detect(struct spinand_device *spinand) | |
936 | { | |
937 | struct device *dev = &spinand->spimem->spi->dev; | |
938 | struct nand_device *nand = spinand_to_nand(spinand); | |
939 | int ret; | |
940 | ||
941 | ret = spinand_reset_op(spinand); | |
942 | if (ret) | |
943 | return ret; | |
944 | ||
f1541773 | 945 | ret = spinand_id_detect(spinand); |
7529df46 PP |
946 | if (ret) { |
947 | dev_err(dev, "unknown raw ID %*phN\n", SPINAND_MAX_ID_LEN, | |
948 | spinand->id.data); | |
949 | return ret; | |
950 | } | |
951 | ||
952 | if (nand->memorg.ntargets > 1 && !spinand->select_target) { | |
953 | dev_err(dev, | |
954 | "SPI NANDs with more than one die must implement ->select_target()\n"); | |
955 | return -EINVAL; | |
956 | } | |
957 | ||
958 | dev_info(&spinand->spimem->spi->dev, | |
959 | "%s SPI NAND was found.\n", spinand->manufacturer->name); | |
960 | dev_info(&spinand->spimem->spi->dev, | |
961 | "%llu MiB, block size: %zu KiB, page size: %zu, OOB size: %u\n", | |
962 | nanddev_size(nand) >> 20, nanddev_eraseblock_size(nand) >> 10, | |
963 | nanddev_page_size(nand), nanddev_per_page_oobsize(nand)); | |
964 | ||
965 | return 0; | |
966 | } | |
967 | ||
968 | static int spinand_noecc_ooblayout_ecc(struct mtd_info *mtd, int section, | |
969 | struct mtd_oob_region *region) | |
970 | { | |
971 | return -ERANGE; | |
972 | } | |
973 | ||
974 | static int spinand_noecc_ooblayout_free(struct mtd_info *mtd, int section, | |
975 | struct mtd_oob_region *region) | |
976 | { | |
977 | if (section) | |
978 | return -ERANGE; | |
979 | ||
980 | /* Reserve 2 bytes for the BBM. */ | |
981 | region->offset = 2; | |
982 | region->length = 62; | |
983 | ||
984 | return 0; | |
985 | } | |
986 | ||
987 | static const struct mtd_ooblayout_ops spinand_noecc_ooblayout = { | |
988 | .ecc = spinand_noecc_ooblayout_ecc, | |
989 | .free = spinand_noecc_ooblayout_free, | |
990 | }; | |
991 | ||
992 | static int spinand_init(struct spinand_device *spinand) | |
993 | { | |
994 | struct device *dev = &spinand->spimem->spi->dev; | |
995 | struct mtd_info *mtd = spinand_to_mtd(spinand); | |
996 | struct nand_device *nand = mtd_to_nanddev(mtd); | |
997 | int ret, i; | |
998 | ||
999 | /* | |
1000 | * We need a scratch buffer because the spi_mem interface requires that | |
1001 | * buf passed in spi_mem_op->data.buf be DMA-able. | |
1002 | */ | |
1003 | spinand->scratchbuf = kzalloc(SPINAND_MAX_ID_LEN, GFP_KERNEL); | |
1004 | if (!spinand->scratchbuf) | |
1005 | return -ENOMEM; | |
1006 | ||
1007 | ret = spinand_detect(spinand); | |
1008 | if (ret) | |
1009 | goto err_free_bufs; | |
1010 | ||
1011 | /* | |
1012 | * Use kzalloc() instead of devm_kzalloc() here, because some drivers | |
1013 | * may use this buffer for DMA access. | |
1014 | * Memory allocated by devm_ does not guarantee DMA-safe alignment. | |
1015 | */ | |
1016 | spinand->databuf = kzalloc(nanddev_page_size(nand) + | |
1017 | nanddev_per_page_oobsize(nand), | |
1018 | GFP_KERNEL); | |
1019 | if (!spinand->databuf) { | |
1020 | ret = -ENOMEM; | |
1021 | goto err_free_bufs; | |
1022 | } | |
1023 | ||
1024 | spinand->oobbuf = spinand->databuf + nanddev_page_size(nand); | |
1025 | ||
1026 | ret = spinand_init_cfg_cache(spinand); | |
1027 | if (ret) | |
1028 | goto err_free_bufs; | |
1029 | ||
1030 | ret = spinand_init_quad_enable(spinand); | |
1031 | if (ret) | |
1032 | goto err_free_bufs; | |
1033 | ||
1034 | ret = spinand_upd_cfg(spinand, CFG_OTP_ENABLE, 0); | |
1035 | if (ret) | |
1036 | goto err_free_bufs; | |
1037 | ||
1038 | ret = spinand_manufacturer_init(spinand); | |
1039 | if (ret) { | |
1040 | dev_err(dev, | |
1041 | "Failed to initialize the SPI NAND chip (err = %d)\n", | |
1042 | ret); | |
1043 | goto err_free_bufs; | |
1044 | } | |
1045 | ||
981d1aa0 BB |
1046 | ret = spinand_create_dirmaps(spinand); |
1047 | if (ret) { | |
1048 | dev_err(dev, | |
1049 | "Failed to create direct mappings for read/write operations (err = %d)\n", | |
1050 | ret); | |
1051 | goto err_manuf_cleanup; | |
1052 | } | |
1053 | ||
7529df46 PP |
1054 | /* After power up, all blocks are locked, so unlock them here. */ |
1055 | for (i = 0; i < nand->memorg.ntargets; i++) { | |
1056 | ret = spinand_select_target(spinand, i); | |
1057 | if (ret) | |
c3c7dbf4 | 1058 | goto err_manuf_cleanup; |
7529df46 PP |
1059 | |
1060 | ret = spinand_lock_block(spinand, BL_ALL_UNLOCKED); | |
1061 | if (ret) | |
c3c7dbf4 | 1062 | goto err_manuf_cleanup; |
7529df46 PP |
1063 | } |
1064 | ||
1065 | ret = nanddev_init(nand, &spinand_ops, THIS_MODULE); | |
1066 | if (ret) | |
1067 | goto err_manuf_cleanup; | |
1068 | ||
1069 | /* | |
1070 | * Right now, we don't support ECC, so let the whole oob | |
1071 | * area is available for user. | |
1072 | */ | |
1073 | mtd->_read_oob = spinand_mtd_read; | |
1074 | mtd->_write_oob = spinand_mtd_write; | |
1075 | mtd->_block_isbad = spinand_mtd_block_isbad; | |
1076 | mtd->_block_markbad = spinand_mtd_block_markbad; | |
1077 | mtd->_block_isreserved = spinand_mtd_block_isreserved; | |
1078 | mtd->_erase = spinand_mtd_erase; | |
50919848 | 1079 | mtd->_max_bad_blocks = nanddev_mtd_max_bad_blocks; |
7529df46 PP |
1080 | |
1081 | if (spinand->eccinfo.ooblayout) | |
1082 | mtd_set_ooblayout(mtd, spinand->eccinfo.ooblayout); | |
1083 | else | |
1084 | mtd_set_ooblayout(mtd, &spinand_noecc_ooblayout); | |
1085 | ||
1086 | ret = mtd_ooblayout_count_freebytes(mtd); | |
1087 | if (ret < 0) | |
1088 | goto err_cleanup_nanddev; | |
1089 | ||
1090 | mtd->oobavail = ret; | |
1091 | ||
3507273d MR |
1092 | /* Propagate ECC information to mtd_info */ |
1093 | mtd->ecc_strength = nand->eccreq.strength; | |
1094 | mtd->ecc_step_size = nand->eccreq.step_size; | |
1095 | ||
7529df46 PP |
1096 | return 0; |
1097 | ||
1098 | err_cleanup_nanddev: | |
1099 | nanddev_cleanup(nand); | |
1100 | ||
1101 | err_manuf_cleanup: | |
1102 | spinand_manufacturer_cleanup(spinand); | |
1103 | ||
1104 | err_free_bufs: | |
1105 | kfree(spinand->databuf); | |
1106 | kfree(spinand->scratchbuf); | |
1107 | return ret; | |
1108 | } | |
1109 | ||
1110 | static void spinand_cleanup(struct spinand_device *spinand) | |
1111 | { | |
1112 | struct nand_device *nand = spinand_to_nand(spinand); | |
1113 | ||
1114 | nanddev_cleanup(nand); | |
1115 | spinand_manufacturer_cleanup(spinand); | |
1116 | kfree(spinand->databuf); | |
1117 | kfree(spinand->scratchbuf); | |
1118 | } | |
1119 | ||
1120 | static int spinand_probe(struct spi_mem *mem) | |
1121 | { | |
1122 | struct spinand_device *spinand; | |
1123 | struct mtd_info *mtd; | |
1124 | int ret; | |
1125 | ||
1126 | spinand = devm_kzalloc(&mem->spi->dev, sizeof(*spinand), | |
1127 | GFP_KERNEL); | |
1128 | if (!spinand) | |
1129 | return -ENOMEM; | |
1130 | ||
1131 | spinand->spimem = mem; | |
1132 | spi_mem_set_drvdata(mem, spinand); | |
1133 | spinand_set_of_node(spinand, mem->spi->dev.of_node); | |
1134 | mutex_init(&spinand->lock); | |
1135 | mtd = spinand_to_mtd(spinand); | |
1136 | mtd->dev.parent = &mem->spi->dev; | |
1137 | ||
1138 | ret = spinand_init(spinand); | |
1139 | if (ret) | |
1140 | return ret; | |
1141 | ||
1142 | ret = mtd_device_register(mtd, NULL, 0); | |
1143 | if (ret) | |
1144 | goto err_spinand_cleanup; | |
1145 | ||
1146 | return 0; | |
1147 | ||
1148 | err_spinand_cleanup: | |
1149 | spinand_cleanup(spinand); | |
1150 | ||
1151 | return ret; | |
1152 | } | |
1153 | ||
1154 | static int spinand_remove(struct spi_mem *mem) | |
1155 | { | |
1156 | struct spinand_device *spinand; | |
1157 | struct mtd_info *mtd; | |
1158 | int ret; | |
1159 | ||
1160 | spinand = spi_mem_get_drvdata(mem); | |
1161 | mtd = spinand_to_mtd(spinand); | |
1162 | ||
1163 | ret = mtd_device_unregister(mtd); | |
1164 | if (ret) | |
1165 | return ret; | |
1166 | ||
1167 | spinand_cleanup(spinand); | |
1168 | ||
1169 | return 0; | |
1170 | } | |
1171 | ||
1172 | static const struct spi_device_id spinand_ids[] = { | |
1173 | { .name = "spi-nand" }, | |
1174 | { /* sentinel */ }, | |
1175 | }; | |
1176 | ||
1177 | #ifdef CONFIG_OF | |
1178 | static const struct of_device_id spinand_of_ids[] = { | |
1179 | { .compatible = "spi-nand" }, | |
1180 | { /* sentinel */ }, | |
1181 | }; | |
1182 | #endif | |
1183 | ||
1184 | static struct spi_mem_driver spinand_drv = { | |
1185 | .spidrv = { | |
1186 | .id_table = spinand_ids, | |
1187 | .driver = { | |
1188 | .name = "spi-nand", | |
1189 | .of_match_table = of_match_ptr(spinand_of_ids), | |
1190 | }, | |
1191 | }, | |
1192 | .probe = spinand_probe, | |
1193 | .remove = spinand_remove, | |
1194 | }; | |
1195 | module_spi_mem_driver(spinand_drv); | |
1196 | ||
1197 | MODULE_DESCRIPTION("SPI NAND framework"); | |
1198 | MODULE_AUTHOR("Peter Pan<peterpandong@micron.com>"); | |
1199 | MODULE_LICENSE("GPL v2"); |