Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
045e9a5d | 2 | * $Id: mtdchar.c,v 1.68 2005/02/08 19:12:50 nico Exp $ |
1da177e4 LT |
3 | * |
4 | * Character-device access to raw MTD devices. | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <linux/config.h> | |
9 | #include <linux/kernel.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/mtd/mtd.h> | |
12 | #include <linux/mtd/compatmac.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/fs.h> | |
16 | #include <asm/uaccess.h> | |
17 | ||
18 | #ifdef CONFIG_DEVFS_FS | |
19 | #include <linux/devfs_fs_kernel.h> | |
20 | ||
21 | static void mtd_notify_add(struct mtd_info* mtd) | |
22 | { | |
23 | if (!mtd) | |
24 | return; | |
25 | ||
26 | devfs_mk_cdev(MKDEV(MTD_CHAR_MAJOR, mtd->index*2), | |
27 | S_IFCHR | S_IRUGO | S_IWUGO, "mtd/%d", mtd->index); | |
28 | ||
29 | devfs_mk_cdev(MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1), | |
30 | S_IFCHR | S_IRUGO, "mtd/%dro", mtd->index); | |
31 | } | |
32 | ||
33 | static void mtd_notify_remove(struct mtd_info* mtd) | |
34 | { | |
35 | if (!mtd) | |
36 | return; | |
37 | devfs_remove("mtd/%d", mtd->index); | |
38 | devfs_remove("mtd/%dro", mtd->index); | |
39 | } | |
40 | ||
41 | static struct mtd_notifier notifier = { | |
42 | .add = mtd_notify_add, | |
43 | .remove = mtd_notify_remove, | |
44 | }; | |
45 | ||
46 | static inline void mtdchar_devfs_init(void) | |
47 | { | |
48 | devfs_mk_dir("mtd"); | |
49 | register_mtd_user(¬ifier); | |
50 | } | |
51 | ||
52 | static inline void mtdchar_devfs_exit(void) | |
53 | { | |
54 | unregister_mtd_user(¬ifier); | |
55 | devfs_remove("mtd"); | |
56 | } | |
57 | #else /* !DEVFS */ | |
58 | #define mtdchar_devfs_init() do { } while(0) | |
59 | #define mtdchar_devfs_exit() do { } while(0) | |
60 | #endif | |
61 | ||
045e9a5d NP |
62 | /* |
63 | * We use file->private_data to store a pointer to the MTDdevice. | |
64 | * Since alighment is at least 32 bits, we have 2 bits free for OTP | |
65 | * modes as well. | |
66 | */ | |
67 | ||
68 | #define TO_MTD(file) (struct mtd_info *)((long)((file)->private_data) & ~3L) | |
31f4233b | 69 | |
045e9a5d NP |
70 | #define MTD_MODE_OTP_FACT 1 |
71 | #define MTD_MODE_OTP_USER 2 | |
72 | #define MTD_MODE(file) ((long)((file)->private_data) & 3) | |
73 | ||
74 | #define SET_MTD_MODE(file, mode) \ | |
75 | do { long __p = (long)((file)->private_data); \ | |
76 | (file)->private_data = (void *)((__p & ~3L) | mode); } while (0) | |
31f4233b | 77 | |
1da177e4 LT |
78 | static loff_t mtd_lseek (struct file *file, loff_t offset, int orig) |
79 | { | |
045e9a5d | 80 | struct mtd_info *mtd = TO_MTD(file); |
1da177e4 LT |
81 | |
82 | switch (orig) { | |
83 | case 0: | |
84 | /* SEEK_SET */ | |
85 | file->f_pos = offset; | |
86 | break; | |
87 | case 1: | |
88 | /* SEEK_CUR */ | |
89 | file->f_pos += offset; | |
90 | break; | |
91 | case 2: | |
92 | /* SEEK_END */ | |
93 | file->f_pos =mtd->size + offset; | |
94 | break; | |
95 | default: | |
96 | return -EINVAL; | |
97 | } | |
98 | ||
99 | if (file->f_pos < 0) | |
100 | file->f_pos = 0; | |
101 | else if (file->f_pos >= mtd->size) | |
102 | file->f_pos = mtd->size - 1; | |
103 | ||
104 | return file->f_pos; | |
105 | } | |
106 | ||
107 | ||
108 | ||
109 | static int mtd_open(struct inode *inode, struct file *file) | |
110 | { | |
111 | int minor = iminor(inode); | |
112 | int devnum = minor >> 1; | |
113 | struct mtd_info *mtd; | |
114 | ||
115 | DEBUG(MTD_DEBUG_LEVEL0, "MTD_open\n"); | |
116 | ||
117 | if (devnum >= MAX_MTD_DEVICES) | |
118 | return -ENODEV; | |
119 | ||
120 | /* You can't open the RO devices RW */ | |
121 | if ((file->f_mode & 2) && (minor & 1)) | |
122 | return -EACCES; | |
123 | ||
124 | mtd = get_mtd_device(NULL, devnum); | |
125 | ||
126 | if (!mtd) | |
127 | return -ENODEV; | |
128 | ||
129 | if (MTD_ABSENT == mtd->type) { | |
130 | put_mtd_device(mtd); | |
131 | return -ENODEV; | |
132 | } | |
133 | ||
134 | file->private_data = mtd; | |
135 | ||
136 | /* You can't open it RW if it's not a writeable device */ | |
137 | if ((file->f_mode & 2) && !(mtd->flags & MTD_WRITEABLE)) { | |
138 | put_mtd_device(mtd); | |
139 | return -EACCES; | |
140 | } | |
141 | ||
142 | return 0; | |
143 | } /* mtd_open */ | |
144 | ||
145 | /*====================================================================*/ | |
146 | ||
147 | static int mtd_close(struct inode *inode, struct file *file) | |
148 | { | |
149 | struct mtd_info *mtd; | |
150 | ||
151 | DEBUG(MTD_DEBUG_LEVEL0, "MTD_close\n"); | |
152 | ||
045e9a5d | 153 | mtd = TO_MTD(file); |
1da177e4 LT |
154 | |
155 | if (mtd->sync) | |
156 | mtd->sync(mtd); | |
157 | ||
158 | put_mtd_device(mtd); | |
159 | ||
160 | return 0; | |
161 | } /* mtd_close */ | |
162 | ||
163 | /* FIXME: This _really_ needs to die. In 2.5, we should lock the | |
164 | userspace buffer down and use it directly with readv/writev. | |
165 | */ | |
166 | #define MAX_KMALLOC_SIZE 0x20000 | |
167 | ||
168 | static ssize_t mtd_read(struct file *file, char __user *buf, size_t count,loff_t *ppos) | |
169 | { | |
045e9a5d | 170 | struct mtd_info *mtd = TO_MTD(file); |
1da177e4 LT |
171 | size_t retlen=0; |
172 | size_t total_retlen=0; | |
173 | int ret=0; | |
174 | int len; | |
175 | char *kbuf; | |
176 | ||
177 | DEBUG(MTD_DEBUG_LEVEL0,"MTD_read\n"); | |
178 | ||
179 | if (*ppos + count > mtd->size) | |
180 | count = mtd->size - *ppos; | |
181 | ||
182 | if (!count) | |
183 | return 0; | |
184 | ||
185 | /* FIXME: Use kiovec in 2.5 to lock down the user's buffers | |
186 | and pass them directly to the MTD functions */ | |
187 | while (count) { | |
188 | if (count > MAX_KMALLOC_SIZE) | |
189 | len = MAX_KMALLOC_SIZE; | |
190 | else | |
191 | len = count; | |
192 | ||
193 | kbuf=kmalloc(len,GFP_KERNEL); | |
194 | if (!kbuf) | |
195 | return -ENOMEM; | |
196 | ||
045e9a5d | 197 | switch (MTD_MODE(file)) { |
31f4233b NP |
198 | case MTD_MODE_OTP_FACT: |
199 | ret = mtd->read_fact_prot_reg(mtd, *ppos, len, &retlen, kbuf); | |
200 | break; | |
201 | case MTD_MODE_OTP_USER: | |
202 | ret = mtd->read_user_prot_reg(mtd, *ppos, len, &retlen, kbuf); | |
203 | break; | |
204 | default: | |
205 | ret = MTD_READ(mtd, *ppos, len, &retlen, kbuf); | |
206 | } | |
1da177e4 LT |
207 | /* Nand returns -EBADMSG on ecc errors, but it returns |
208 | * the data. For our userspace tools it is important | |
209 | * to dump areas with ecc errors ! | |
210 | * Userspace software which accesses NAND this way | |
211 | * must be aware of the fact that it deals with NAND | |
212 | */ | |
213 | if (!ret || (ret == -EBADMSG)) { | |
214 | *ppos += retlen; | |
215 | if (copy_to_user(buf, kbuf, retlen)) { | |
216 | kfree(kbuf); | |
217 | return -EFAULT; | |
218 | } | |
219 | else | |
220 | total_retlen += retlen; | |
221 | ||
222 | count -= retlen; | |
223 | buf += retlen; | |
31f4233b NP |
224 | if (retlen == 0) |
225 | count = 0; | |
1da177e4 LT |
226 | } |
227 | else { | |
228 | kfree(kbuf); | |
229 | return ret; | |
230 | } | |
231 | ||
232 | kfree(kbuf); | |
233 | } | |
234 | ||
235 | return total_retlen; | |
236 | } /* mtd_read */ | |
237 | ||
238 | static ssize_t mtd_write(struct file *file, const char __user *buf, size_t count,loff_t *ppos) | |
239 | { | |
045e9a5d | 240 | struct mtd_info *mtd = TO_MTD(file); |
1da177e4 LT |
241 | char *kbuf; |
242 | size_t retlen; | |
243 | size_t total_retlen=0; | |
244 | int ret=0; | |
245 | int len; | |
246 | ||
247 | DEBUG(MTD_DEBUG_LEVEL0,"MTD_write\n"); | |
248 | ||
249 | if (*ppos == mtd->size) | |
250 | return -ENOSPC; | |
251 | ||
252 | if (*ppos + count > mtd->size) | |
253 | count = mtd->size - *ppos; | |
254 | ||
255 | if (!count) | |
256 | return 0; | |
257 | ||
258 | while (count) { | |
259 | if (count > MAX_KMALLOC_SIZE) | |
260 | len = MAX_KMALLOC_SIZE; | |
261 | else | |
262 | len = count; | |
263 | ||
264 | kbuf=kmalloc(len,GFP_KERNEL); | |
265 | if (!kbuf) { | |
266 | printk("kmalloc is null\n"); | |
267 | return -ENOMEM; | |
268 | } | |
269 | ||
270 | if (copy_from_user(kbuf, buf, len)) { | |
271 | kfree(kbuf); | |
272 | return -EFAULT; | |
273 | } | |
274 | ||
045e9a5d | 275 | switch (MTD_MODE(file)) { |
31f4233b NP |
276 | case MTD_MODE_OTP_FACT: |
277 | ret = -EROFS; | |
278 | break; | |
279 | case MTD_MODE_OTP_USER: | |
280 | if (!mtd->write_user_prot_reg) { | |
281 | ret = -EOPNOTSUPP; | |
282 | break; | |
283 | } | |
284 | ret = mtd->write_user_prot_reg(mtd, *ppos, len, &retlen, kbuf); | |
285 | break; | |
286 | default: | |
287 | ret = (*(mtd->write))(mtd, *ppos, len, &retlen, kbuf); | |
288 | } | |
1da177e4 LT |
289 | if (!ret) { |
290 | *ppos += retlen; | |
291 | total_retlen += retlen; | |
292 | count -= retlen; | |
293 | buf += retlen; | |
294 | } | |
295 | else { | |
296 | kfree(kbuf); | |
297 | return ret; | |
298 | } | |
299 | ||
300 | kfree(kbuf); | |
301 | } | |
302 | ||
303 | return total_retlen; | |
304 | } /* mtd_write */ | |
305 | ||
306 | /*====================================================================== | |
307 | ||
308 | IOCTL calls for getting device parameters. | |
309 | ||
310 | ======================================================================*/ | |
311 | static void mtdchar_erase_callback (struct erase_info *instr) | |
312 | { | |
313 | wake_up((wait_queue_head_t *)instr->priv); | |
314 | } | |
315 | ||
316 | static int mtd_ioctl(struct inode *inode, struct file *file, | |
317 | u_int cmd, u_long arg) | |
318 | { | |
045e9a5d | 319 | struct mtd_info *mtd = TO_MTD(file); |
1da177e4 LT |
320 | void __user *argp = (void __user *)arg; |
321 | int ret = 0; | |
322 | u_long size; | |
323 | ||
324 | DEBUG(MTD_DEBUG_LEVEL0, "MTD_ioctl\n"); | |
325 | ||
326 | size = (cmd & IOCSIZE_MASK) >> IOCSIZE_SHIFT; | |
327 | if (cmd & IOC_IN) { | |
328 | if (!access_ok(VERIFY_READ, argp, size)) | |
329 | return -EFAULT; | |
330 | } | |
331 | if (cmd & IOC_OUT) { | |
332 | if (!access_ok(VERIFY_WRITE, argp, size)) | |
333 | return -EFAULT; | |
334 | } | |
335 | ||
336 | switch (cmd) { | |
337 | case MEMGETREGIONCOUNT: | |
338 | if (copy_to_user(argp, &(mtd->numeraseregions), sizeof(int))) | |
339 | return -EFAULT; | |
340 | break; | |
341 | ||
342 | case MEMGETREGIONINFO: | |
343 | { | |
344 | struct region_info_user ur; | |
345 | ||
346 | if (copy_from_user(&ur, argp, sizeof(struct region_info_user))) | |
347 | return -EFAULT; | |
348 | ||
349 | if (ur.regionindex >= mtd->numeraseregions) | |
350 | return -EINVAL; | |
351 | if (copy_to_user(argp, &(mtd->eraseregions[ur.regionindex]), | |
352 | sizeof(struct mtd_erase_region_info))) | |
353 | return -EFAULT; | |
354 | break; | |
355 | } | |
356 | ||
357 | case MEMGETINFO: | |
358 | if (copy_to_user(argp, mtd, sizeof(struct mtd_info_user))) | |
359 | return -EFAULT; | |
360 | break; | |
361 | ||
362 | case MEMERASE: | |
363 | { | |
364 | struct erase_info *erase; | |
365 | ||
366 | if(!(file->f_mode & 2)) | |
367 | return -EPERM; | |
368 | ||
369 | erase=kmalloc(sizeof(struct erase_info),GFP_KERNEL); | |
370 | if (!erase) | |
371 | ret = -ENOMEM; | |
372 | else { | |
373 | wait_queue_head_t waitq; | |
374 | DECLARE_WAITQUEUE(wait, current); | |
375 | ||
376 | init_waitqueue_head(&waitq); | |
377 | ||
378 | memset (erase,0,sizeof(struct erase_info)); | |
379 | if (copy_from_user(&erase->addr, argp, | |
380 | sizeof(struct erase_info_user))) { | |
381 | kfree(erase); | |
382 | return -EFAULT; | |
383 | } | |
384 | erase->mtd = mtd; | |
385 | erase->callback = mtdchar_erase_callback; | |
386 | erase->priv = (unsigned long)&waitq; | |
387 | ||
388 | /* | |
389 | FIXME: Allow INTERRUPTIBLE. Which means | |
390 | not having the wait_queue head on the stack. | |
391 | ||
392 | If the wq_head is on the stack, and we | |
393 | leave because we got interrupted, then the | |
394 | wq_head is no longer there when the | |
395 | callback routine tries to wake us up. | |
396 | */ | |
397 | ret = mtd->erase(mtd, erase); | |
398 | if (!ret) { | |
399 | set_current_state(TASK_UNINTERRUPTIBLE); | |
400 | add_wait_queue(&waitq, &wait); | |
401 | if (erase->state != MTD_ERASE_DONE && | |
402 | erase->state != MTD_ERASE_FAILED) | |
403 | schedule(); | |
404 | remove_wait_queue(&waitq, &wait); | |
405 | set_current_state(TASK_RUNNING); | |
406 | ||
407 | ret = (erase->state == MTD_ERASE_FAILED)?-EIO:0; | |
408 | } | |
409 | kfree(erase); | |
410 | } | |
411 | break; | |
412 | } | |
413 | ||
414 | case MEMWRITEOOB: | |
415 | { | |
416 | struct mtd_oob_buf buf; | |
417 | void *databuf; | |
418 | ssize_t retlen; | |
419 | ||
420 | if(!(file->f_mode & 2)) | |
421 | return -EPERM; | |
422 | ||
423 | if (copy_from_user(&buf, argp, sizeof(struct mtd_oob_buf))) | |
424 | return -EFAULT; | |
425 | ||
426 | if (buf.length > 0x4096) | |
427 | return -EINVAL; | |
428 | ||
429 | if (!mtd->write_oob) | |
430 | ret = -EOPNOTSUPP; | |
431 | else | |
432 | ret = access_ok(VERIFY_READ, buf.ptr, | |
433 | buf.length) ? 0 : EFAULT; | |
434 | ||
435 | if (ret) | |
436 | return ret; | |
437 | ||
438 | databuf = kmalloc(buf.length, GFP_KERNEL); | |
439 | if (!databuf) | |
440 | return -ENOMEM; | |
441 | ||
442 | if (copy_from_user(databuf, buf.ptr, buf.length)) { | |
443 | kfree(databuf); | |
444 | return -EFAULT; | |
445 | } | |
446 | ||
447 | ret = (mtd->write_oob)(mtd, buf.start, buf.length, &retlen, databuf); | |
448 | ||
449 | if (copy_to_user(argp + sizeof(uint32_t), &retlen, sizeof(uint32_t))) | |
450 | ret = -EFAULT; | |
451 | ||
452 | kfree(databuf); | |
453 | break; | |
454 | ||
455 | } | |
456 | ||
457 | case MEMREADOOB: | |
458 | { | |
459 | struct mtd_oob_buf buf; | |
460 | void *databuf; | |
461 | ssize_t retlen; | |
462 | ||
463 | if (copy_from_user(&buf, argp, sizeof(struct mtd_oob_buf))) | |
464 | return -EFAULT; | |
465 | ||
466 | if (buf.length > 0x4096) | |
467 | return -EINVAL; | |
468 | ||
469 | if (!mtd->read_oob) | |
470 | ret = -EOPNOTSUPP; | |
471 | else | |
472 | ret = access_ok(VERIFY_WRITE, buf.ptr, | |
473 | buf.length) ? 0 : -EFAULT; | |
474 | ||
475 | if (ret) | |
476 | return ret; | |
477 | ||
478 | databuf = kmalloc(buf.length, GFP_KERNEL); | |
479 | if (!databuf) | |
480 | return -ENOMEM; | |
481 | ||
482 | ret = (mtd->read_oob)(mtd, buf.start, buf.length, &retlen, databuf); | |
483 | ||
484 | if (put_user(retlen, (uint32_t __user *)argp)) | |
485 | ret = -EFAULT; | |
486 | else if (retlen && copy_to_user(buf.ptr, databuf, retlen)) | |
487 | ret = -EFAULT; | |
488 | ||
489 | kfree(databuf); | |
490 | break; | |
491 | } | |
492 | ||
493 | case MEMLOCK: | |
494 | { | |
495 | struct erase_info_user info; | |
496 | ||
497 | if (copy_from_user(&info, argp, sizeof(info))) | |
498 | return -EFAULT; | |
499 | ||
500 | if (!mtd->lock) | |
501 | ret = -EOPNOTSUPP; | |
502 | else | |
503 | ret = mtd->lock(mtd, info.start, info.length); | |
504 | break; | |
505 | } | |
506 | ||
507 | case MEMUNLOCK: | |
508 | { | |
509 | struct erase_info_user info; | |
510 | ||
511 | if (copy_from_user(&info, argp, sizeof(info))) | |
512 | return -EFAULT; | |
513 | ||
514 | if (!mtd->unlock) | |
515 | ret = -EOPNOTSUPP; | |
516 | else | |
517 | ret = mtd->unlock(mtd, info.start, info.length); | |
518 | break; | |
519 | } | |
520 | ||
521 | case MEMSETOOBSEL: | |
522 | { | |
523 | if (copy_from_user(&mtd->oobinfo, argp, sizeof(struct nand_oobinfo))) | |
524 | return -EFAULT; | |
525 | break; | |
526 | } | |
527 | ||
528 | case MEMGETOOBSEL: | |
529 | { | |
530 | if (copy_to_user(argp, &(mtd->oobinfo), sizeof(struct nand_oobinfo))) | |
531 | return -EFAULT; | |
532 | break; | |
533 | } | |
534 | ||
535 | case MEMGETBADBLOCK: | |
536 | { | |
537 | loff_t offs; | |
538 | ||
539 | if (copy_from_user(&offs, argp, sizeof(loff_t))) | |
540 | return -EFAULT; | |
541 | if (!mtd->block_isbad) | |
542 | ret = -EOPNOTSUPP; | |
543 | else | |
544 | return mtd->block_isbad(mtd, offs); | |
545 | break; | |
546 | } | |
547 | ||
548 | case MEMSETBADBLOCK: | |
549 | { | |
550 | loff_t offs; | |
551 | ||
552 | if (copy_from_user(&offs, argp, sizeof(loff_t))) | |
553 | return -EFAULT; | |
554 | if (!mtd->block_markbad) | |
555 | ret = -EOPNOTSUPP; | |
556 | else | |
557 | return mtd->block_markbad(mtd, offs); | |
558 | break; | |
559 | } | |
560 | ||
31f4233b NP |
561 | #ifdef CONFIG_MTD_OTP |
562 | case OTPSELECT: | |
563 | { | |
564 | int mode; | |
565 | if (copy_from_user(&mode, argp, sizeof(int))) | |
566 | return -EFAULT; | |
045e9a5d | 567 | SET_MTD_MODE(file, 0); |
31f4233b NP |
568 | switch (mode) { |
569 | case MTD_OTP_FACTORY: | |
570 | if (!mtd->read_fact_prot_reg) | |
571 | ret = -EOPNOTSUPP; | |
572 | else | |
045e9a5d | 573 | SET_MTD_MODE(file, MTD_MODE_OTP_FACT); |
31f4233b NP |
574 | break; |
575 | case MTD_OTP_USER: | |
576 | if (!mtd->read_fact_prot_reg) | |
577 | ret = -EOPNOTSUPP; | |
578 | else | |
045e9a5d | 579 | SET_MTD_MODE(file, MTD_MODE_OTP_USER); |
31f4233b NP |
580 | break; |
581 | default: | |
582 | ret = -EINVAL; | |
583 | case MTD_OTP_OFF: | |
584 | break; | |
585 | } | |
586 | break; | |
587 | } | |
588 | ||
589 | case OTPGETREGIONCOUNT: | |
590 | case OTPGETREGIONINFO: | |
591 | { | |
592 | struct otp_info *buf = kmalloc(4096, GFP_KERNEL); | |
593 | if (!buf) | |
594 | return -ENOMEM; | |
595 | ret = -EOPNOTSUPP; | |
045e9a5d | 596 | switch (MTD_MODE(file)) { |
31f4233b NP |
597 | case MTD_MODE_OTP_FACT: |
598 | if (mtd->get_fact_prot_info) | |
599 | ret = mtd->get_fact_prot_info(mtd, buf, 4096); | |
600 | break; | |
601 | case MTD_MODE_OTP_USER: | |
602 | if (mtd->get_user_prot_info) | |
603 | ret = mtd->get_user_prot_info(mtd, buf, 4096); | |
604 | break; | |
605 | } | |
606 | if (ret >= 0) { | |
607 | if (cmd == OTPGETREGIONCOUNT) { | |
608 | int nbr = ret / sizeof(struct otp_info); | |
609 | ret = copy_to_user(argp, &nbr, sizeof(int)); | |
610 | } else | |
611 | ret = copy_to_user(argp, buf, ret); | |
612 | if (ret) | |
613 | ret = -EFAULT; | |
614 | } | |
615 | kfree(buf); | |
616 | break; | |
617 | } | |
618 | ||
619 | case OTPLOCK: | |
620 | { | |
621 | struct otp_info info; | |
622 | ||
045e9a5d | 623 | if (MTD_MODE(file) != MTD_MODE_OTP_USER) |
31f4233b NP |
624 | return -EINVAL; |
625 | if (copy_from_user(&info, argp, sizeof(info))) | |
626 | return -EFAULT; | |
627 | if (!mtd->lock_user_prot_reg) | |
628 | return -EOPNOTSUPP; | |
629 | ret = mtd->lock_user_prot_reg(mtd, info.start, info.length); | |
630 | break; | |
631 | } | |
632 | #endif | |
633 | ||
1da177e4 LT |
634 | default: |
635 | ret = -ENOTTY; | |
636 | } | |
637 | ||
638 | return ret; | |
639 | } /* memory_ioctl */ | |
640 | ||
641 | static struct file_operations mtd_fops = { | |
642 | .owner = THIS_MODULE, | |
643 | .llseek = mtd_lseek, | |
644 | .read = mtd_read, | |
645 | .write = mtd_write, | |
646 | .ioctl = mtd_ioctl, | |
647 | .open = mtd_open, | |
648 | .release = mtd_close, | |
649 | }; | |
650 | ||
651 | static int __init init_mtdchar(void) | |
652 | { | |
653 | if (register_chrdev(MTD_CHAR_MAJOR, "mtd", &mtd_fops)) { | |
654 | printk(KERN_NOTICE "Can't allocate major number %d for Memory Technology Devices.\n", | |
655 | MTD_CHAR_MAJOR); | |
656 | return -EAGAIN; | |
657 | } | |
658 | ||
659 | mtdchar_devfs_init(); | |
660 | return 0; | |
661 | } | |
662 | ||
663 | static void __exit cleanup_mtdchar(void) | |
664 | { | |
665 | mtdchar_devfs_exit(); | |
666 | unregister_chrdev(MTD_CHAR_MAJOR, "mtd"); | |
667 | } | |
668 | ||
669 | module_init(init_mtdchar); | |
670 | module_exit(cleanup_mtdchar); | |
671 | ||
672 | ||
673 | MODULE_LICENSE("GPL"); | |
674 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
675 | MODULE_DESCRIPTION("Direct character-device access to MTD devices"); |