]>
Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
97894cda | 2 | * $Id: mtdchar.c,v 1.76 2005/11/07 11:14:20 gleixner Exp $ |
1da177e4 LT |
3 | * |
4 | * Character-device access to raw MTD devices. | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <linux/config.h> | |
15fdc52f TG |
9 | #include <linux/device.h> |
10 | #include <linux/fs.h> | |
11 | #include <linux/init.h> | |
1da177e4 LT |
12 | #include <linux/kernel.h> |
13 | #include <linux/module.h> | |
15fdc52f TG |
14 | #include <linux/slab.h> |
15 | #include <linux/sched.h> | |
16 | ||
1da177e4 LT |
17 | #include <linux/mtd/mtd.h> |
18 | #include <linux/mtd/compatmac.h> | |
1da177e4 | 19 | |
15fdc52f | 20 | #include <asm/uaccess.h> |
9bc7b387 TP |
21 | |
22 | static struct class *mtd_class; | |
1da177e4 LT |
23 | |
24 | static void mtd_notify_add(struct mtd_info* mtd) | |
25 | { | |
26 | if (!mtd) | |
27 | return; | |
28 | ||
53f46542 | 29 | class_device_create(mtd_class, NULL, MKDEV(MTD_CHAR_MAJOR, mtd->index*2), |
9bc7b387 | 30 | NULL, "mtd%d", mtd->index); |
97894cda | 31 | |
53f46542 | 32 | class_device_create(mtd_class, NULL, |
9bc7b387 TP |
33 | MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1), |
34 | NULL, "mtd%dro", mtd->index); | |
1da177e4 LT |
35 | } |
36 | ||
37 | static void mtd_notify_remove(struct mtd_info* mtd) | |
38 | { | |
39 | if (!mtd) | |
40 | return; | |
9bc7b387 TP |
41 | |
42 | class_device_destroy(mtd_class, MKDEV(MTD_CHAR_MAJOR, mtd->index*2)); | |
43 | class_device_destroy(mtd_class, MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1)); | |
1da177e4 LT |
44 | } |
45 | ||
46 | static struct mtd_notifier notifier = { | |
47 | .add = mtd_notify_add, | |
48 | .remove = mtd_notify_remove, | |
49 | }; | |
50 | ||
045e9a5d | 51 | /* |
f1a28c02 TG |
52 | * Data structure to hold the pointer to the mtd device as well |
53 | * as mode information ofr various use cases. | |
045e9a5d | 54 | */ |
f1a28c02 TG |
55 | struct mtd_file_info { |
56 | struct mtd_info *mtd; | |
57 | enum mtd_file_modes mode; | |
58 | }; | |
31f4233b | 59 | |
1da177e4 LT |
60 | static loff_t mtd_lseek (struct file *file, loff_t offset, int orig) |
61 | { | |
f1a28c02 TG |
62 | struct mtd_file_info *mfi = file->private_data; |
63 | struct mtd_info *mtd = mfi->mtd; | |
1da177e4 LT |
64 | |
65 | switch (orig) { | |
66 | case 0: | |
67 | /* SEEK_SET */ | |
1da177e4 LT |
68 | break; |
69 | case 1: | |
70 | /* SEEK_CUR */ | |
8b491d75 | 71 | offset += file->f_pos; |
1da177e4 LT |
72 | break; |
73 | case 2: | |
74 | /* SEEK_END */ | |
8b491d75 | 75 | offset += mtd->size; |
1da177e4 LT |
76 | break; |
77 | default: | |
78 | return -EINVAL; | |
79 | } | |
80 | ||
8b491d75 TP |
81 | if (offset >= 0 && offset < mtd->size) |
82 | return file->f_pos = offset; | |
1da177e4 | 83 | |
8b491d75 | 84 | return -EINVAL; |
1da177e4 LT |
85 | } |
86 | ||
87 | ||
88 | ||
89 | static int mtd_open(struct inode *inode, struct file *file) | |
90 | { | |
91 | int minor = iminor(inode); | |
92 | int devnum = minor >> 1; | |
93 | struct mtd_info *mtd; | |
f1a28c02 | 94 | struct mtd_file_info *mfi; |
1da177e4 LT |
95 | |
96 | DEBUG(MTD_DEBUG_LEVEL0, "MTD_open\n"); | |
97 | ||
98 | if (devnum >= MAX_MTD_DEVICES) | |
99 | return -ENODEV; | |
100 | ||
101 | /* You can't open the RO devices RW */ | |
102 | if ((file->f_mode & 2) && (minor & 1)) | |
103 | return -EACCES; | |
104 | ||
105 | mtd = get_mtd_device(NULL, devnum); | |
97894cda | 106 | |
1da177e4 LT |
107 | if (!mtd) |
108 | return -ENODEV; | |
97894cda | 109 | |
1da177e4 LT |
110 | if (MTD_ABSENT == mtd->type) { |
111 | put_mtd_device(mtd); | |
112 | return -ENODEV; | |
113 | } | |
114 | ||
1da177e4 LT |
115 | /* You can't open it RW if it's not a writeable device */ |
116 | if ((file->f_mode & 2) && !(mtd->flags & MTD_WRITEABLE)) { | |
117 | put_mtd_device(mtd); | |
118 | return -EACCES; | |
119 | } | |
97894cda | 120 | |
f1a28c02 TG |
121 | mfi = kzalloc(sizeof(*mfi), GFP_KERNEL); |
122 | if (!mfi) { | |
123 | put_mtd_device(mtd); | |
124 | return -ENOMEM; | |
125 | } | |
126 | mfi->mtd = mtd; | |
127 | file->private_data = mfi; | |
128 | ||
1da177e4 LT |
129 | return 0; |
130 | } /* mtd_open */ | |
131 | ||
132 | /*====================================================================*/ | |
133 | ||
134 | static int mtd_close(struct inode *inode, struct file *file) | |
135 | { | |
f1a28c02 TG |
136 | struct mtd_file_info *mfi = file->private_data; |
137 | struct mtd_info *mtd = mfi->mtd; | |
1da177e4 LT |
138 | |
139 | DEBUG(MTD_DEBUG_LEVEL0, "MTD_close\n"); | |
140 | ||
1da177e4 LT |
141 | if (mtd->sync) |
142 | mtd->sync(mtd); | |
97894cda | 143 | |
1da177e4 | 144 | put_mtd_device(mtd); |
f1a28c02 TG |
145 | file->private_data = NULL; |
146 | kfree(mfi); | |
1da177e4 LT |
147 | |
148 | return 0; | |
149 | } /* mtd_close */ | |
150 | ||
151 | /* FIXME: This _really_ needs to die. In 2.5, we should lock the | |
152 | userspace buffer down and use it directly with readv/writev. | |
153 | */ | |
154 | #define MAX_KMALLOC_SIZE 0x20000 | |
155 | ||
156 | static ssize_t mtd_read(struct file *file, char __user *buf, size_t count,loff_t *ppos) | |
157 | { | |
f1a28c02 TG |
158 | struct mtd_file_info *mfi = file->private_data; |
159 | struct mtd_info *mtd = mfi->mtd; | |
1da177e4 LT |
160 | size_t retlen=0; |
161 | size_t total_retlen=0; | |
162 | int ret=0; | |
163 | int len; | |
164 | char *kbuf; | |
97894cda | 165 | |
1da177e4 LT |
166 | DEBUG(MTD_DEBUG_LEVEL0,"MTD_read\n"); |
167 | ||
168 | if (*ppos + count > mtd->size) | |
169 | count = mtd->size - *ppos; | |
170 | ||
171 | if (!count) | |
172 | return 0; | |
97894cda | 173 | |
1da177e4 LT |
174 | /* FIXME: Use kiovec in 2.5 to lock down the user's buffers |
175 | and pass them directly to the MTD functions */ | |
b802c074 TG |
176 | |
177 | if (count > MAX_KMALLOC_SIZE) | |
178 | kbuf=kmalloc(MAX_KMALLOC_SIZE, GFP_KERNEL); | |
179 | else | |
180 | kbuf=kmalloc(count, GFP_KERNEL); | |
181 | ||
182 | if (!kbuf) | |
183 | return -ENOMEM; | |
184 | ||
1da177e4 | 185 | while (count) { |
b802c074 | 186 | |
97894cda | 187 | if (count > MAX_KMALLOC_SIZE) |
1da177e4 LT |
188 | len = MAX_KMALLOC_SIZE; |
189 | else | |
190 | len = count; | |
191 | ||
f1a28c02 TG |
192 | switch (mfi->mode) { |
193 | case MTD_MODE_OTP_FACTORY: | |
31f4233b NP |
194 | ret = mtd->read_fact_prot_reg(mtd, *ppos, len, &retlen, kbuf); |
195 | break; | |
196 | case MTD_MODE_OTP_USER: | |
197 | ret = mtd->read_user_prot_reg(mtd, *ppos, len, &retlen, kbuf); | |
198 | break; | |
f1a28c02 TG |
199 | case MTD_MODE_RAW: |
200 | { | |
201 | struct mtd_oob_ops ops; | |
202 | ||
203 | ops.mode = MTD_OOB_RAW; | |
204 | ops.datbuf = kbuf; | |
205 | ops.oobbuf = NULL; | |
206 | ops.len = len; | |
207 | ||
208 | ret = mtd->read_oob(mtd, *ppos, &ops); | |
209 | retlen = ops.retlen; | |
210 | break; | |
211 | } | |
31f4233b | 212 | default: |
f4a43cfc | 213 | ret = mtd->read(mtd, *ppos, len, &retlen, kbuf); |
31f4233b | 214 | } |
1da177e4 LT |
215 | /* Nand returns -EBADMSG on ecc errors, but it returns |
216 | * the data. For our userspace tools it is important | |
97894cda | 217 | * to dump areas with ecc errors ! |
9a1fcdfd TG |
218 | * For kernel internal usage it also might return -EUCLEAN |
219 | * to signal the caller that a bitflip has occured and has | |
220 | * been corrected by the ECC algorithm. | |
1da177e4 LT |
221 | * Userspace software which accesses NAND this way |
222 | * must be aware of the fact that it deals with NAND | |
223 | */ | |
9a1fcdfd | 224 | if (!ret || (ret == -EUCLEAN) || (ret == -EBADMSG)) { |
1da177e4 LT |
225 | *ppos += retlen; |
226 | if (copy_to_user(buf, kbuf, retlen)) { | |
f4a43cfc | 227 | kfree(kbuf); |
1da177e4 LT |
228 | return -EFAULT; |
229 | } | |
230 | else | |
231 | total_retlen += retlen; | |
232 | ||
233 | count -= retlen; | |
234 | buf += retlen; | |
31f4233b NP |
235 | if (retlen == 0) |
236 | count = 0; | |
1da177e4 LT |
237 | } |
238 | else { | |
239 | kfree(kbuf); | |
240 | return ret; | |
241 | } | |
97894cda | 242 | |
1da177e4 LT |
243 | } |
244 | ||
b802c074 | 245 | kfree(kbuf); |
1da177e4 LT |
246 | return total_retlen; |
247 | } /* mtd_read */ | |
248 | ||
249 | static ssize_t mtd_write(struct file *file, const char __user *buf, size_t count,loff_t *ppos) | |
250 | { | |
f1a28c02 TG |
251 | struct mtd_file_info *mfi = file->private_data; |
252 | struct mtd_info *mtd = mfi->mtd; | |
1da177e4 LT |
253 | char *kbuf; |
254 | size_t retlen; | |
255 | size_t total_retlen=0; | |
256 | int ret=0; | |
257 | int len; | |
258 | ||
259 | DEBUG(MTD_DEBUG_LEVEL0,"MTD_write\n"); | |
97894cda | 260 | |
1da177e4 LT |
261 | if (*ppos == mtd->size) |
262 | return -ENOSPC; | |
97894cda | 263 | |
1da177e4 LT |
264 | if (*ppos + count > mtd->size) |
265 | count = mtd->size - *ppos; | |
266 | ||
267 | if (!count) | |
268 | return 0; | |
269 | ||
b802c074 TG |
270 | if (count > MAX_KMALLOC_SIZE) |
271 | kbuf=kmalloc(MAX_KMALLOC_SIZE, GFP_KERNEL); | |
272 | else | |
273 | kbuf=kmalloc(count, GFP_KERNEL); | |
274 | ||
275 | if (!kbuf) | |
276 | return -ENOMEM; | |
277 | ||
1da177e4 | 278 | while (count) { |
b802c074 | 279 | |
97894cda | 280 | if (count > MAX_KMALLOC_SIZE) |
1da177e4 LT |
281 | len = MAX_KMALLOC_SIZE; |
282 | else | |
283 | len = count; | |
284 | ||
1da177e4 LT |
285 | if (copy_from_user(kbuf, buf, len)) { |
286 | kfree(kbuf); | |
287 | return -EFAULT; | |
288 | } | |
97894cda | 289 | |
f1a28c02 TG |
290 | switch (mfi->mode) { |
291 | case MTD_MODE_OTP_FACTORY: | |
31f4233b NP |
292 | ret = -EROFS; |
293 | break; | |
294 | case MTD_MODE_OTP_USER: | |
295 | if (!mtd->write_user_prot_reg) { | |
296 | ret = -EOPNOTSUPP; | |
297 | break; | |
298 | } | |
299 | ret = mtd->write_user_prot_reg(mtd, *ppos, len, &retlen, kbuf); | |
300 | break; | |
f1a28c02 TG |
301 | |
302 | case MTD_MODE_RAW: | |
303 | { | |
304 | struct mtd_oob_ops ops; | |
305 | ||
306 | ops.mode = MTD_OOB_RAW; | |
307 | ops.datbuf = kbuf; | |
308 | ops.oobbuf = NULL; | |
309 | ops.len = len; | |
310 | ||
311 | ret = mtd->write_oob(mtd, *ppos, &ops); | |
312 | retlen = ops.retlen; | |
313 | break; | |
314 | } | |
315 | ||
31f4233b NP |
316 | default: |
317 | ret = (*(mtd->write))(mtd, *ppos, len, &retlen, kbuf); | |
318 | } | |
1da177e4 LT |
319 | if (!ret) { |
320 | *ppos += retlen; | |
321 | total_retlen += retlen; | |
322 | count -= retlen; | |
323 | buf += retlen; | |
324 | } | |
325 | else { | |
326 | kfree(kbuf); | |
327 | return ret; | |
328 | } | |
1da177e4 LT |
329 | } |
330 | ||
b802c074 | 331 | kfree(kbuf); |
1da177e4 LT |
332 | return total_retlen; |
333 | } /* mtd_write */ | |
334 | ||
335 | /*====================================================================== | |
336 | ||
337 | IOCTL calls for getting device parameters. | |
338 | ||
339 | ======================================================================*/ | |
340 | static void mtdchar_erase_callback (struct erase_info *instr) | |
341 | { | |
342 | wake_up((wait_queue_head_t *)instr->priv); | |
343 | } | |
344 | ||
f1a28c02 TG |
345 | #if defined(CONFIG_MTD_OTP) || defined(CONFIG_MTD_ONENAND_OTP) |
346 | static int otp_select_filemode(struct mtd_file_info *mfi, int mode) | |
347 | { | |
348 | struct mtd_info *mtd = mfi->mtd; | |
349 | int ret = 0; | |
350 | ||
351 | switch (mode) { | |
352 | case MTD_OTP_FACTORY: | |
353 | if (!mtd->read_fact_prot_reg) | |
354 | ret = -EOPNOTSUPP; | |
355 | else | |
356 | mfi->mode = MTD_MODE_OTP_FACTORY; | |
357 | break; | |
358 | case MTD_OTP_USER: | |
359 | if (!mtd->read_fact_prot_reg) | |
360 | ret = -EOPNOTSUPP; | |
361 | else | |
362 | mfi->mode = MTD_MODE_OTP_USER; | |
363 | break; | |
364 | default: | |
365 | ret = -EINVAL; | |
366 | case MTD_OTP_OFF: | |
367 | break; | |
368 | } | |
369 | return ret; | |
370 | } | |
371 | #else | |
372 | # define otp_select_filemode(f,m) -EOPNOTSUPP | |
373 | #endif | |
374 | ||
1da177e4 LT |
375 | static int mtd_ioctl(struct inode *inode, struct file *file, |
376 | u_int cmd, u_long arg) | |
377 | { | |
f1a28c02 TG |
378 | struct mtd_file_info *mfi = file->private_data; |
379 | struct mtd_info *mtd = mfi->mtd; | |
1da177e4 LT |
380 | void __user *argp = (void __user *)arg; |
381 | int ret = 0; | |
382 | u_long size; | |
73c619ea | 383 | struct mtd_info_user info; |
97894cda | 384 | |
1da177e4 LT |
385 | DEBUG(MTD_DEBUG_LEVEL0, "MTD_ioctl\n"); |
386 | ||
387 | size = (cmd & IOCSIZE_MASK) >> IOCSIZE_SHIFT; | |
388 | if (cmd & IOC_IN) { | |
389 | if (!access_ok(VERIFY_READ, argp, size)) | |
390 | return -EFAULT; | |
391 | } | |
392 | if (cmd & IOC_OUT) { | |
393 | if (!access_ok(VERIFY_WRITE, argp, size)) | |
394 | return -EFAULT; | |
395 | } | |
97894cda | 396 | |
1da177e4 LT |
397 | switch (cmd) { |
398 | case MEMGETREGIONCOUNT: | |
399 | if (copy_to_user(argp, &(mtd->numeraseregions), sizeof(int))) | |
400 | return -EFAULT; | |
401 | break; | |
402 | ||
403 | case MEMGETREGIONINFO: | |
404 | { | |
405 | struct region_info_user ur; | |
406 | ||
407 | if (copy_from_user(&ur, argp, sizeof(struct region_info_user))) | |
408 | return -EFAULT; | |
409 | ||
410 | if (ur.regionindex >= mtd->numeraseregions) | |
411 | return -EINVAL; | |
412 | if (copy_to_user(argp, &(mtd->eraseregions[ur.regionindex]), | |
413 | sizeof(struct mtd_erase_region_info))) | |
414 | return -EFAULT; | |
415 | break; | |
416 | } | |
417 | ||
418 | case MEMGETINFO: | |
73c619ea JE |
419 | info.type = mtd->type; |
420 | info.flags = mtd->flags; | |
421 | info.size = mtd->size; | |
422 | info.erasesize = mtd->erasesize; | |
423 | info.writesize = mtd->writesize; | |
424 | info.oobsize = mtd->oobsize; | |
425 | info.ecctype = mtd->ecctype; | |
426 | info.eccsize = mtd->eccsize; | |
427 | if (copy_to_user(argp, &info, sizeof(struct mtd_info_user))) | |
1da177e4 LT |
428 | return -EFAULT; |
429 | break; | |
430 | ||
431 | case MEMERASE: | |
432 | { | |
433 | struct erase_info *erase; | |
434 | ||
435 | if(!(file->f_mode & 2)) | |
436 | return -EPERM; | |
437 | ||
438 | erase=kmalloc(sizeof(struct erase_info),GFP_KERNEL); | |
439 | if (!erase) | |
440 | ret = -ENOMEM; | |
441 | else { | |
442 | wait_queue_head_t waitq; | |
443 | DECLARE_WAITQUEUE(wait, current); | |
444 | ||
445 | init_waitqueue_head(&waitq); | |
446 | ||
447 | memset (erase,0,sizeof(struct erase_info)); | |
448 | if (copy_from_user(&erase->addr, argp, | |
449 | sizeof(struct erase_info_user))) { | |
450 | kfree(erase); | |
451 | return -EFAULT; | |
452 | } | |
453 | erase->mtd = mtd; | |
454 | erase->callback = mtdchar_erase_callback; | |
455 | erase->priv = (unsigned long)&waitq; | |
97894cda | 456 | |
1da177e4 LT |
457 | /* |
458 | FIXME: Allow INTERRUPTIBLE. Which means | |
459 | not having the wait_queue head on the stack. | |
97894cda | 460 | |
1da177e4 LT |
461 | If the wq_head is on the stack, and we |
462 | leave because we got interrupted, then the | |
463 | wq_head is no longer there when the | |
464 | callback routine tries to wake us up. | |
465 | */ | |
466 | ret = mtd->erase(mtd, erase); | |
467 | if (!ret) { | |
468 | set_current_state(TASK_UNINTERRUPTIBLE); | |
469 | add_wait_queue(&waitq, &wait); | |
470 | if (erase->state != MTD_ERASE_DONE && | |
471 | erase->state != MTD_ERASE_FAILED) | |
472 | schedule(); | |
473 | remove_wait_queue(&waitq, &wait); | |
474 | set_current_state(TASK_RUNNING); | |
475 | ||
476 | ret = (erase->state == MTD_ERASE_FAILED)?-EIO:0; | |
477 | } | |
478 | kfree(erase); | |
479 | } | |
480 | break; | |
481 | } | |
482 | ||
483 | case MEMWRITEOOB: | |
484 | { | |
485 | struct mtd_oob_buf buf; | |
8593fbc6 | 486 | struct mtd_oob_ops ops; |
97894cda | 487 | |
1da177e4 LT |
488 | if(!(file->f_mode & 2)) |
489 | return -EPERM; | |
490 | ||
491 | if (copy_from_user(&buf, argp, sizeof(struct mtd_oob_buf))) | |
492 | return -EFAULT; | |
97894cda | 493 | |
8593fbc6 | 494 | if (buf.length > 4096) |
1da177e4 LT |
495 | return -EINVAL; |
496 | ||
497 | if (!mtd->write_oob) | |
498 | ret = -EOPNOTSUPP; | |
499 | else | |
500 | ret = access_ok(VERIFY_READ, buf.ptr, | |
501 | buf.length) ? 0 : EFAULT; | |
502 | ||
503 | if (ret) | |
504 | return ret; | |
505 | ||
8593fbc6 TG |
506 | ops.len = buf.length; |
507 | ops.ooblen = mtd->oobsize; | |
508 | ops.ooboffs = buf.start & (mtd->oobsize - 1); | |
509 | ops.datbuf = NULL; | |
510 | ops.mode = MTD_OOB_PLACE; | |
511 | ||
512 | if (ops.ooboffs && ops.len > (ops.ooblen - ops.ooboffs)) | |
513 | return -EINVAL; | |
514 | ||
515 | ops.oobbuf = kmalloc(buf.length, GFP_KERNEL); | |
516 | if (!ops.oobbuf) | |
1da177e4 | 517 | return -ENOMEM; |
97894cda | 518 | |
8593fbc6 TG |
519 | if (copy_from_user(ops.oobbuf, buf.ptr, buf.length)) { |
520 | kfree(ops.oobbuf); | |
1da177e4 LT |
521 | return -EFAULT; |
522 | } | |
523 | ||
8593fbc6 TG |
524 | buf.start &= ~(mtd->oobsize - 1); |
525 | ret = mtd->write_oob(mtd, buf.start, &ops); | |
1da177e4 | 526 | |
8593fbc6 TG |
527 | if (copy_to_user(argp + sizeof(uint32_t), &ops.retlen, |
528 | sizeof(uint32_t))) | |
1da177e4 LT |
529 | ret = -EFAULT; |
530 | ||
8593fbc6 | 531 | kfree(ops.oobbuf); |
1da177e4 LT |
532 | break; |
533 | ||
534 | } | |
535 | ||
536 | case MEMREADOOB: | |
537 | { | |
538 | struct mtd_oob_buf buf; | |
8593fbc6 | 539 | struct mtd_oob_ops ops; |
1da177e4 LT |
540 | |
541 | if (copy_from_user(&buf, argp, sizeof(struct mtd_oob_buf))) | |
542 | return -EFAULT; | |
97894cda | 543 | |
8593fbc6 | 544 | if (buf.length > 4096) |
1da177e4 LT |
545 | return -EINVAL; |
546 | ||
547 | if (!mtd->read_oob) | |
548 | ret = -EOPNOTSUPP; | |
549 | else | |
550 | ret = access_ok(VERIFY_WRITE, buf.ptr, | |
551 | buf.length) ? 0 : -EFAULT; | |
1da177e4 LT |
552 | if (ret) |
553 | return ret; | |
554 | ||
8593fbc6 TG |
555 | ops.len = buf.length; |
556 | ops.ooblen = mtd->oobsize; | |
557 | ops.ooboffs = buf.start & (mtd->oobsize - 1); | |
558 | ops.datbuf = NULL; | |
559 | ops.mode = MTD_OOB_PLACE; | |
560 | ||
561 | if (ops.ooboffs && ops.len > (ops.ooblen - ops.ooboffs)) | |
562 | return -EINVAL; | |
563 | ||
564 | ops.oobbuf = kmalloc(buf.length, GFP_KERNEL); | |
565 | if (!ops.oobbuf) | |
1da177e4 | 566 | return -ENOMEM; |
97894cda | 567 | |
8593fbc6 TG |
568 | buf.start &= ~(mtd->oobsize - 1); |
569 | ret = mtd->read_oob(mtd, buf.start, &ops); | |
1da177e4 | 570 | |
8593fbc6 | 571 | if (put_user(ops.retlen, (uint32_t __user *)argp)) |
1da177e4 | 572 | ret = -EFAULT; |
8593fbc6 TG |
573 | else if (ops.retlen && copy_to_user(buf.ptr, ops.oobbuf, |
574 | ops.retlen)) | |
1da177e4 | 575 | ret = -EFAULT; |
97894cda | 576 | |
8593fbc6 | 577 | kfree(ops.oobbuf); |
1da177e4 LT |
578 | break; |
579 | } | |
580 | ||
581 | case MEMLOCK: | |
582 | { | |
583 | struct erase_info_user info; | |
584 | ||
585 | if (copy_from_user(&info, argp, sizeof(info))) | |
586 | return -EFAULT; | |
587 | ||
588 | if (!mtd->lock) | |
589 | ret = -EOPNOTSUPP; | |
590 | else | |
591 | ret = mtd->lock(mtd, info.start, info.length); | |
592 | break; | |
593 | } | |
594 | ||
595 | case MEMUNLOCK: | |
596 | { | |
597 | struct erase_info_user info; | |
598 | ||
599 | if (copy_from_user(&info, argp, sizeof(info))) | |
600 | return -EFAULT; | |
601 | ||
602 | if (!mtd->unlock) | |
603 | ret = -EOPNOTSUPP; | |
604 | else | |
605 | ret = mtd->unlock(mtd, info.start, info.length); | |
606 | break; | |
607 | } | |
608 | ||
5bd34c09 | 609 | /* Legacy interface */ |
1da177e4 LT |
610 | case MEMGETOOBSEL: |
611 | { | |
5bd34c09 TG |
612 | struct nand_oobinfo oi; |
613 | ||
614 | if (!mtd->ecclayout) | |
615 | return -EOPNOTSUPP; | |
616 | if (mtd->ecclayout->eccbytes > ARRAY_SIZE(oi.eccpos)) | |
617 | return -EINVAL; | |
618 | ||
619 | oi.useecc = MTD_NANDECC_AUTOPLACE; | |
620 | memcpy(&oi.eccpos, mtd->ecclayout->eccpos, sizeof(oi.eccpos)); | |
621 | memcpy(&oi.oobfree, mtd->ecclayout->oobfree, | |
622 | sizeof(oi.oobfree)); | |
623 | ||
624 | if (copy_to_user(argp, &oi, sizeof(struct nand_oobinfo))) | |
1da177e4 LT |
625 | return -EFAULT; |
626 | break; | |
627 | } | |
628 | ||
629 | case MEMGETBADBLOCK: | |
630 | { | |
631 | loff_t offs; | |
97894cda | 632 | |
1da177e4 LT |
633 | if (copy_from_user(&offs, argp, sizeof(loff_t))) |
634 | return -EFAULT; | |
635 | if (!mtd->block_isbad) | |
636 | ret = -EOPNOTSUPP; | |
637 | else | |
638 | return mtd->block_isbad(mtd, offs); | |
639 | break; | |
640 | } | |
641 | ||
642 | case MEMSETBADBLOCK: | |
643 | { | |
644 | loff_t offs; | |
645 | ||
646 | if (copy_from_user(&offs, argp, sizeof(loff_t))) | |
647 | return -EFAULT; | |
648 | if (!mtd->block_markbad) | |
649 | ret = -EOPNOTSUPP; | |
650 | else | |
651 | return mtd->block_markbad(mtd, offs); | |
652 | break; | |
653 | } | |
654 | ||
493c6460 | 655 | #if defined(CONFIG_MTD_OTP) || defined(CONFIG_MTD_ONENAND_OTP) |
31f4233b NP |
656 | case OTPSELECT: |
657 | { | |
658 | int mode; | |
659 | if (copy_from_user(&mode, argp, sizeof(int))) | |
660 | return -EFAULT; | |
f1a28c02 TG |
661 | |
662 | mfi->mode = MTD_MODE_NORMAL; | |
663 | ||
664 | ret = otp_select_filemode(mfi, mode); | |
665 | ||
81dba488 | 666 | file->f_pos = 0; |
31f4233b NP |
667 | break; |
668 | } | |
669 | ||
670 | case OTPGETREGIONCOUNT: | |
671 | case OTPGETREGIONINFO: | |
672 | { | |
673 | struct otp_info *buf = kmalloc(4096, GFP_KERNEL); | |
674 | if (!buf) | |
675 | return -ENOMEM; | |
676 | ret = -EOPNOTSUPP; | |
f1a28c02 TG |
677 | switch (mfi->mode) { |
678 | case MTD_MODE_OTP_FACTORY: | |
31f4233b NP |
679 | if (mtd->get_fact_prot_info) |
680 | ret = mtd->get_fact_prot_info(mtd, buf, 4096); | |
681 | break; | |
682 | case MTD_MODE_OTP_USER: | |
683 | if (mtd->get_user_prot_info) | |
684 | ret = mtd->get_user_prot_info(mtd, buf, 4096); | |
685 | break; | |
f1a28c02 TG |
686 | default: |
687 | break; | |
31f4233b NP |
688 | } |
689 | if (ret >= 0) { | |
690 | if (cmd == OTPGETREGIONCOUNT) { | |
691 | int nbr = ret / sizeof(struct otp_info); | |
692 | ret = copy_to_user(argp, &nbr, sizeof(int)); | |
693 | } else | |
694 | ret = copy_to_user(argp, buf, ret); | |
695 | if (ret) | |
696 | ret = -EFAULT; | |
697 | } | |
698 | kfree(buf); | |
699 | break; | |
700 | } | |
701 | ||
702 | case OTPLOCK: | |
703 | { | |
704 | struct otp_info info; | |
705 | ||
f1a28c02 | 706 | if (mfi->mode != MTD_MODE_OTP_USER) |
31f4233b NP |
707 | return -EINVAL; |
708 | if (copy_from_user(&info, argp, sizeof(info))) | |
709 | return -EFAULT; | |
710 | if (!mtd->lock_user_prot_reg) | |
711 | return -EOPNOTSUPP; | |
712 | ret = mtd->lock_user_prot_reg(mtd, info.start, info.length); | |
713 | break; | |
714 | } | |
715 | #endif | |
716 | ||
f1a28c02 TG |
717 | case ECCGETLAYOUT: |
718 | { | |
719 | if (!mtd->ecclayout) | |
720 | return -EOPNOTSUPP; | |
721 | ||
722 | if (copy_to_user(argp, &mtd->ecclayout, | |
723 | sizeof(struct nand_ecclayout))) | |
724 | return -EFAULT; | |
725 | break; | |
726 | } | |
727 | ||
728 | case ECCGETSTATS: | |
729 | { | |
730 | if (copy_to_user(argp, &mtd->ecc_stats, | |
731 | sizeof(struct mtd_ecc_stats))) | |
732 | return -EFAULT; | |
733 | break; | |
734 | } | |
735 | ||
736 | case MTDFILEMODE: | |
737 | { | |
738 | mfi->mode = 0; | |
739 | ||
740 | switch(arg) { | |
741 | case MTD_MODE_OTP_FACTORY: | |
742 | case MTD_MODE_OTP_USER: | |
743 | ret = otp_select_filemode(mfi, arg); | |
744 | break; | |
745 | ||
746 | case MTD_MODE_RAW: | |
747 | if (!mtd->read_oob || !mtd->write_oob) | |
748 | return -EOPNOTSUPP; | |
749 | mfi->mode = arg; | |
750 | ||
751 | case MTD_MODE_NORMAL: | |
752 | break; | |
753 | default: | |
754 | ret = -EINVAL; | |
755 | } | |
756 | file->f_pos = 0; | |
757 | break; | |
758 | } | |
759 | ||
1da177e4 LT |
760 | default: |
761 | ret = -ENOTTY; | |
762 | } | |
763 | ||
764 | return ret; | |
765 | } /* memory_ioctl */ | |
766 | ||
767 | static struct file_operations mtd_fops = { | |
768 | .owner = THIS_MODULE, | |
769 | .llseek = mtd_lseek, | |
770 | .read = mtd_read, | |
771 | .write = mtd_write, | |
772 | .ioctl = mtd_ioctl, | |
773 | .open = mtd_open, | |
774 | .release = mtd_close, | |
775 | }; | |
776 | ||
777 | static int __init init_mtdchar(void) | |
778 | { | |
779 | if (register_chrdev(MTD_CHAR_MAJOR, "mtd", &mtd_fops)) { | |
780 | printk(KERN_NOTICE "Can't allocate major number %d for Memory Technology Devices.\n", | |
781 | MTD_CHAR_MAJOR); | |
782 | return -EAGAIN; | |
783 | } | |
784 | ||
9bc7b387 TP |
785 | mtd_class = class_create(THIS_MODULE, "mtd"); |
786 | ||
787 | if (IS_ERR(mtd_class)) { | |
788 | printk(KERN_ERR "Error creating mtd class.\n"); | |
789 | unregister_chrdev(MTD_CHAR_MAJOR, "mtd"); | |
3a7a8824 | 790 | return PTR_ERR(mtd_class); |
9bc7b387 TP |
791 | } |
792 | ||
793 | register_mtd_user(¬ifier); | |
1da177e4 LT |
794 | return 0; |
795 | } | |
796 | ||
797 | static void __exit cleanup_mtdchar(void) | |
798 | { | |
9bc7b387 TP |
799 | unregister_mtd_user(¬ifier); |
800 | class_destroy(mtd_class); | |
1da177e4 LT |
801 | unregister_chrdev(MTD_CHAR_MAJOR, "mtd"); |
802 | } | |
803 | ||
804 | module_init(init_mtdchar); | |
805 | module_exit(cleanup_mtdchar); | |
806 | ||
807 | ||
808 | MODULE_LICENSE("GPL"); | |
809 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
810 | MODULE_DESCRIPTION("Direct character-device access to MTD devices"); |