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Commit | Line | Data |
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ed9eccbe DS |
1 | /* |
2 | module/drivers.c | |
3 | functions for manipulating drivers | |
4 | ||
5 | COMEDI - Linux Control and Measurement Device Interface | |
6 | Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org> | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | ||
22 | */ | |
23 | ||
24 | #define _GNU_SOURCE | |
25 | ||
26 | #define __NO_VERSION__ | |
27 | #include "comedi_fops.h" | |
28 | #include <linux/device.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/pci.h> | |
c28264da | 31 | #include <linux/usb.h> |
ed9eccbe DS |
32 | #include <linux/errno.h> |
33 | #include <linux/kernel.h> | |
34 | #include <linux/sched.h> | |
35 | #include <linux/fcntl.h> | |
36 | #include <linux/delay.h> | |
37 | #include <linux/ioport.h> | |
38 | #include <linux/mm.h> | |
39 | #include <linux/slab.h> | |
ed9eccbe DS |
40 | #include <linux/highmem.h> /* for SuSE brokenness */ |
41 | #include <linux/vmalloc.h> | |
42 | #include <linux/cdev.h> | |
43 | #include <linux/dma-mapping.h> | |
5617f9da | 44 | #include <linux/io.h> |
ed9eccbe | 45 | |
242e7ad9 GKH |
46 | #include "comedidev.h" |
47 | #include "internal.h" | |
48 | ||
71b5f4f1 | 49 | static int postconfig(struct comedi_device *dev); |
0a85b6f0 MT |
50 | static int insn_rw_emulate_bits(struct comedi_device *dev, |
51 | struct comedi_subdevice *s, | |
52 | struct comedi_insn *insn, unsigned int *data); | |
53 | static void *comedi_recognize(struct comedi_driver *driv, const char *name); | |
139dfbdf | 54 | static void comedi_report_boards(struct comedi_driver *driv); |
34c43922 | 55 | static int poll_invalid(struct comedi_device *dev, struct comedi_subdevice *s); |
ed9eccbe | 56 | |
139dfbdf | 57 | struct comedi_driver *comedi_drivers; |
ed9eccbe | 58 | |
71b5f4f1 | 59 | static void cleanup_device(struct comedi_device *dev) |
ed9eccbe DS |
60 | { |
61 | int i; | |
34c43922 | 62 | struct comedi_subdevice *s; |
ed9eccbe DS |
63 | |
64 | if (dev->subdevices) { | |
65 | for (i = 0; i < dev->n_subdevices; i++) { | |
66 | s = dev->subdevices + i; | |
67 | comedi_free_subdevice_minor(s); | |
68 | if (s->async) { | |
69 | comedi_buf_alloc(dev, s, 0); | |
70 | kfree(s->async); | |
71 | } | |
72 | } | |
73 | kfree(dev->subdevices); | |
74 | dev->subdevices = NULL; | |
75 | dev->n_subdevices = 0; | |
76 | } | |
dedd1325 BP |
77 | kfree(dev->private); |
78 | dev->private = NULL; | |
7029a874 | 79 | dev->driver = NULL; |
ed9eccbe DS |
80 | dev->board_name = NULL; |
81 | dev->board_ptr = NULL; | |
82 | dev->iobase = 0; | |
83 | dev->irq = 0; | |
84 | dev->read_subdev = NULL; | |
85 | dev->write_subdev = NULL; | |
86 | dev->open = NULL; | |
87 | dev->close = NULL; | |
88 | comedi_set_hw_dev(dev, NULL); | |
89 | } | |
90 | ||
71b5f4f1 | 91 | static void __comedi_device_detach(struct comedi_device *dev) |
ed9eccbe DS |
92 | { |
93 | dev->attached = 0; | |
5617f9da | 94 | if (dev->driver) |
ed9eccbe | 95 | dev->driver->detach(dev); |
5617f9da | 96 | else |
67b0e64a MR |
97 | printk(KERN_WARNING |
98 | "BUG: dev->driver=NULL in comedi_device_detach()\n"); | |
ed9eccbe DS |
99 | cleanup_device(dev); |
100 | } | |
101 | ||
71b5f4f1 | 102 | void comedi_device_detach(struct comedi_device *dev) |
ed9eccbe DS |
103 | { |
104 | if (!dev->attached) | |
105 | return; | |
106 | __comedi_device_detach(dev); | |
107 | } | |
108 | ||
3902a370 IA |
109 | /* do a little post-config cleanup */ |
110 | /* called with module refcount incremented, decrements it */ | |
111 | static int comedi_device_postconfig(struct comedi_device *dev) | |
112 | { | |
113 | int ret = postconfig(dev); | |
114 | module_put(dev->driver->module); | |
115 | if (ret < 0) { | |
116 | __comedi_device_detach(dev); | |
117 | return ret; | |
118 | } | |
119 | if (!dev->board_name) { | |
120 | printk(KERN_WARNING "BUG: dev->board_name=<%p>\n", | |
121 | dev->board_name); | |
122 | dev->board_name = "BUG"; | |
123 | } | |
124 | smp_wmb(); | |
125 | dev->attached = 1; | |
126 | return 0; | |
127 | } | |
128 | ||
0707bb04 | 129 | int comedi_device_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
ed9eccbe | 130 | { |
139dfbdf | 131 | struct comedi_driver *driv; |
ed9eccbe DS |
132 | int ret; |
133 | ||
134 | if (dev->attached) | |
135 | return -EBUSY; | |
136 | ||
137 | for (driv = comedi_drivers; driv; driv = driv->next) { | |
138 | if (!try_module_get(driv->module)) { | |
88ab8a84 | 139 | printk(KERN_INFO "comedi: failed to increment module count, skipping\n"); |
ed9eccbe DS |
140 | continue; |
141 | } | |
142 | if (driv->num_names) { | |
143 | dev->board_ptr = comedi_recognize(driv, it->board_name); | |
3902a370 IA |
144 | if (dev->board_ptr) |
145 | break; | |
146 | } else if (strcmp(driv->driver_name, it->board_name)) | |
147 | break; | |
148 | module_put(driv->module); | |
149 | } | |
150 | if (driv == NULL) { | |
151 | /* recognize has failed if we get here */ | |
152 | /* report valid board names before returning error */ | |
153 | for (driv = comedi_drivers; driv; driv = driv->next) { | |
154 | if (!try_module_get(driv->module)) { | |
155 | printk(KERN_INFO | |
156 | "comedi: failed to increment module count\n"); | |
ed9eccbe DS |
157 | continue; |
158 | } | |
3902a370 IA |
159 | comedi_report_boards(driv); |
160 | module_put(driv->module); | |
ed9eccbe | 161 | } |
3902a370 | 162 | return -EIO; |
ed9eccbe | 163 | } |
3902a370 IA |
164 | /* initialize dev->driver here so |
165 | * comedi_error() can be called from attach */ | |
166 | dev->driver = driv; | |
167 | ret = driv->attach(dev, it); | |
ed9eccbe | 168 | if (ret < 0) { |
3902a370 | 169 | module_put(dev->driver->module); |
ed9eccbe DS |
170 | __comedi_device_detach(dev); |
171 | return ret; | |
172 | } | |
3902a370 | 173 | return comedi_device_postconfig(dev); |
ed9eccbe DS |
174 | } |
175 | ||
139dfbdf | 176 | int comedi_driver_register(struct comedi_driver *driver) |
ed9eccbe DS |
177 | { |
178 | driver->next = comedi_drivers; | |
179 | comedi_drivers = driver; | |
180 | ||
181 | return 0; | |
182 | } | |
d58214b0 | 183 | EXPORT_SYMBOL(comedi_driver_register); |
ed9eccbe | 184 | |
139dfbdf | 185 | int comedi_driver_unregister(struct comedi_driver *driver) |
ed9eccbe | 186 | { |
139dfbdf | 187 | struct comedi_driver *prev; |
ed9eccbe DS |
188 | int i; |
189 | ||
190 | /* check for devices using this driver */ | |
191 | for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) { | |
0a85b6f0 MT |
192 | struct comedi_device_file_info *dev_file_info = |
193 | comedi_get_device_file_info(i); | |
71b5f4f1 | 194 | struct comedi_device *dev; |
ed9eccbe | 195 | |
0a85b6f0 MT |
196 | if (dev_file_info == NULL) |
197 | continue; | |
ed9eccbe DS |
198 | dev = dev_file_info->device; |
199 | ||
200 | mutex_lock(&dev->mutex); | |
201 | if (dev->attached && dev->driver == driver) { | |
202 | if (dev->use_count) | |
88ab8a84 XF |
203 | printk(KERN_WARNING "BUG! detaching device with use_count=%d\n", |
204 | dev->use_count); | |
ed9eccbe DS |
205 | comedi_device_detach(dev); |
206 | } | |
207 | mutex_unlock(&dev->mutex); | |
208 | } | |
209 | ||
210 | if (comedi_drivers == driver) { | |
211 | comedi_drivers = driver->next; | |
212 | return 0; | |
213 | } | |
214 | ||
215 | for (prev = comedi_drivers; prev->next; prev = prev->next) { | |
216 | if (prev->next == driver) { | |
217 | prev->next = driver->next; | |
218 | return 0; | |
219 | } | |
220 | } | |
221 | return -EINVAL; | |
222 | } | |
d58214b0 | 223 | EXPORT_SYMBOL(comedi_driver_unregister); |
ed9eccbe | 224 | |
71b5f4f1 | 225 | static int postconfig(struct comedi_device *dev) |
ed9eccbe DS |
226 | { |
227 | int i; | |
34c43922 | 228 | struct comedi_subdevice *s; |
d163679c | 229 | struct comedi_async *async = NULL; |
ed9eccbe DS |
230 | int ret; |
231 | ||
232 | for (i = 0; i < dev->n_subdevices; i++) { | |
233 | s = dev->subdevices + i; | |
234 | ||
235 | if (s->type == COMEDI_SUBD_UNUSED) | |
236 | continue; | |
237 | ||
238 | if (s->len_chanlist == 0) | |
239 | s->len_chanlist = 1; | |
240 | ||
241 | if (s->do_cmd) { | |
4d7df821 IA |
242 | unsigned int buf_size; |
243 | ||
ed9eccbe | 244 | BUG_ON((s->subdev_flags & (SDF_CMD_READ | |
0a85b6f0 | 245 | SDF_CMD_WRITE)) == 0); |
ed9eccbe DS |
246 | BUG_ON(!s->do_cmdtest); |
247 | ||
0a85b6f0 MT |
248 | async = |
249 | kzalloc(sizeof(struct comedi_async), GFP_KERNEL); | |
ed9eccbe | 250 | if (async == NULL) { |
67b0e64a MR |
251 | printk(KERN_INFO |
252 | "failed to allocate async struct\n"); | |
ed9eccbe DS |
253 | return -ENOMEM; |
254 | } | |
255 | init_waitqueue_head(&async->wait_head); | |
256 | async->subdevice = s; | |
257 | s->async = async; | |
258 | ||
4d7df821 IA |
259 | async->max_bufsize = |
260 | comedi_default_buf_maxsize_kb * 1024; | |
261 | buf_size = comedi_default_buf_size_kb * 1024; | |
262 | if (buf_size > async->max_bufsize) | |
263 | buf_size = async->max_bufsize; | |
ed9eccbe DS |
264 | |
265 | async->prealloc_buf = NULL; | |
266 | async->prealloc_bufsz = 0; | |
4d7df821 | 267 | if (comedi_buf_alloc(dev, s, buf_size) < 0) { |
ac4898a0 | 268 | printk(KERN_INFO "Buffer allocation failed\n"); |
ed9eccbe DS |
269 | return -ENOMEM; |
270 | } | |
271 | if (s->buf_change) { | |
4d7df821 | 272 | ret = s->buf_change(dev, s, buf_size); |
ed9eccbe DS |
273 | if (ret < 0) |
274 | return ret; | |
275 | } | |
276 | comedi_alloc_subdevice_minor(dev, s); | |
277 | } | |
278 | ||
279 | if (!s->range_table && !s->range_table_list) | |
280 | s->range_table = &range_unknown; | |
281 | ||
282 | if (!s->insn_read && s->insn_bits) | |
283 | s->insn_read = insn_rw_emulate_bits; | |
284 | if (!s->insn_write && s->insn_bits) | |
285 | s->insn_write = insn_rw_emulate_bits; | |
286 | ||
287 | if (!s->insn_read) | |
288 | s->insn_read = insn_inval; | |
289 | if (!s->insn_write) | |
290 | s->insn_write = insn_inval; | |
291 | if (!s->insn_bits) | |
292 | s->insn_bits = insn_inval; | |
293 | if (!s->insn_config) | |
294 | s->insn_config = insn_inval; | |
295 | ||
296 | if (!s->poll) | |
297 | s->poll = poll_invalid; | |
298 | } | |
299 | ||
300 | return 0; | |
301 | } | |
302 | ||
ac4898a0 ZR |
303 | /* generic recognize function for drivers |
304 | * that register their supported board names */ | |
7029a874 | 305 | static void *comedi_recognize(struct comedi_driver *driv, const char *name) |
ed9eccbe DS |
306 | { |
307 | unsigned i; | |
308 | const char *const *name_ptr = driv->board_name; | |
309 | for (i = 0; i < driv->num_names; i++) { | |
310 | if (strcmp(*name_ptr, name) == 0) | |
311 | return (void *)name_ptr; | |
312 | name_ptr = | |
0a85b6f0 MT |
313 | (const char *const *)((const char *)name_ptr + |
314 | driv->offset); | |
ed9eccbe DS |
315 | } |
316 | ||
317 | return NULL; | |
318 | } | |
319 | ||
7029a874 | 320 | static void comedi_report_boards(struct comedi_driver *driv) |
ed9eccbe DS |
321 | { |
322 | unsigned int i; | |
323 | const char *const *name_ptr; | |
324 | ||
ac4898a0 | 325 | printk(KERN_INFO "comedi: valid board names for %s driver are:\n", |
0a85b6f0 | 326 | driv->driver_name); |
ed9eccbe DS |
327 | |
328 | name_ptr = driv->board_name; | |
329 | for (i = 0; i < driv->num_names; i++) { | |
ac4898a0 | 330 | printk(KERN_INFO " %s\n", *name_ptr); |
ed9eccbe DS |
331 | name_ptr = (const char **)((char *)name_ptr + driv->offset); |
332 | } | |
333 | ||
334 | if (driv->num_names == 0) | |
ac4898a0 | 335 | printk(KERN_INFO " %s\n", driv->driver_name); |
ed9eccbe DS |
336 | } |
337 | ||
34c43922 | 338 | static int poll_invalid(struct comedi_device *dev, struct comedi_subdevice *s) |
ed9eccbe DS |
339 | { |
340 | return -EINVAL; | |
341 | } | |
342 | ||
34c43922 | 343 | int insn_inval(struct comedi_device *dev, struct comedi_subdevice *s, |
0a85b6f0 | 344 | struct comedi_insn *insn, unsigned int *data) |
ed9eccbe DS |
345 | { |
346 | return -EINVAL; | |
347 | } | |
348 | ||
0a85b6f0 MT |
349 | static int insn_rw_emulate_bits(struct comedi_device *dev, |
350 | struct comedi_subdevice *s, | |
351 | struct comedi_insn *insn, unsigned int *data) | |
ed9eccbe | 352 | { |
90035c08 | 353 | struct comedi_insn new_insn; |
ed9eccbe DS |
354 | int ret; |
355 | static const unsigned channels_per_bitfield = 32; | |
356 | ||
357 | unsigned chan = CR_CHAN(insn->chanspec); | |
358 | const unsigned base_bitfield_channel = | |
0a85b6f0 | 359 | (chan < channels_per_bitfield) ? 0 : chan; |
790c5541 | 360 | unsigned int new_data[2]; |
ed9eccbe DS |
361 | memset(new_data, 0, sizeof(new_data)); |
362 | memset(&new_insn, 0, sizeof(new_insn)); | |
363 | new_insn.insn = INSN_BITS; | |
364 | new_insn.chanspec = base_bitfield_channel; | |
365 | new_insn.n = 2; | |
366 | new_insn.data = new_data; | |
367 | new_insn.subdev = insn->subdev; | |
368 | ||
369 | if (insn->insn == INSN_WRITE) { | |
370 | if (!(s->subdev_flags & SDF_WRITABLE)) | |
371 | return -EINVAL; | |
aad4029a MR |
372 | new_data[0] = 1 << (chan - base_bitfield_channel); /* mask */ |
373 | new_data[1] = data[0] ? (1 << (chan - base_bitfield_channel)) | |
374 | : 0; /* bits */ | |
ed9eccbe DS |
375 | } |
376 | ||
377 | ret = s->insn_bits(dev, s, &new_insn, new_data); | |
378 | if (ret < 0) | |
379 | return ret; | |
380 | ||
5617f9da | 381 | if (insn->insn == INSN_READ) |
ed9eccbe | 382 | data[0] = (new_data[1] >> (chan - base_bitfield_channel)) & 1; |
ed9eccbe DS |
383 | |
384 | return 1; | |
385 | } | |
386 | ||
d43d27ab | 387 | static inline unsigned long uvirt_to_kva(pgd_t *pgd, unsigned long adr) |
ed9eccbe DS |
388 | { |
389 | unsigned long ret = 0UL; | |
390 | pmd_t *pmd; | |
391 | pte_t *ptep, pte; | |
392 | pud_t *pud; | |
393 | ||
394 | if (!pgd_none(*pgd)) { | |
395 | pud = pud_offset(pgd, adr); | |
396 | pmd = pmd_offset(pud, adr); | |
397 | if (!pmd_none(*pmd)) { | |
398 | ptep = pte_offset_kernel(pmd, adr); | |
399 | pte = *ptep; | |
400 | if (pte_present(pte)) { | |
401 | ret = (unsigned long) | |
0a85b6f0 | 402 | page_address(pte_page(pte)); |
ed9eccbe DS |
403 | ret |= (adr & (PAGE_SIZE - 1)); |
404 | } | |
405 | } | |
406 | } | |
407 | return ret; | |
408 | } | |
409 | ||
410 | static inline unsigned long kvirt_to_kva(unsigned long adr) | |
411 | { | |
412 | unsigned long va, kva; | |
413 | ||
414 | va = adr; | |
415 | kva = uvirt_to_kva(pgd_offset_k(va), va); | |
416 | ||
417 | return kva; | |
418 | } | |
419 | ||
34c43922 | 420 | int comedi_buf_alloc(struct comedi_device *dev, struct comedi_subdevice *s, |
0a85b6f0 | 421 | unsigned long new_size) |
ed9eccbe | 422 | { |
d163679c | 423 | struct comedi_async *async = s->async; |
ed9eccbe DS |
424 | |
425 | /* Round up new_size to multiple of PAGE_SIZE */ | |
426 | new_size = (new_size + PAGE_SIZE - 1) & PAGE_MASK; | |
427 | ||
428 | /* if no change is required, do nothing */ | |
5617f9da | 429 | if (async->prealloc_buf && async->prealloc_bufsz == new_size) |
ed9eccbe | 430 | return 0; |
5617f9da | 431 | |
b6c77757 | 432 | /* deallocate old buffer */ |
ed9eccbe DS |
433 | if (async->prealloc_buf) { |
434 | vunmap(async->prealloc_buf); | |
435 | async->prealloc_buf = NULL; | |
436 | async->prealloc_bufsz = 0; | |
437 | } | |
438 | if (async->buf_page_list) { | |
439 | unsigned i; | |
440 | for (i = 0; i < async->n_buf_pages; ++i) { | |
441 | if (async->buf_page_list[i].virt_addr) { | |
88ab8a84 XF |
442 | clear_bit(PG_reserved, |
443 | &(virt_to_page(async->buf_page_list[i]. | |
444 | virt_addr)->flags)); | |
ed9eccbe DS |
445 | if (s->async_dma_dir != DMA_NONE) { |
446 | dma_free_coherent(dev->hw_dev, | |
0a85b6f0 MT |
447 | PAGE_SIZE, |
448 | async-> | |
449 | buf_page_list | |
450 | [i].virt_addr, | |
451 | async-> | |
452 | buf_page_list | |
453 | [i].dma_addr); | |
ed9eccbe | 454 | } else { |
0a85b6f0 MT |
455 | free_page((unsigned long) |
456 | async->buf_page_list[i]. | |
457 | virt_addr); | |
ed9eccbe DS |
458 | } |
459 | } | |
460 | } | |
461 | vfree(async->buf_page_list); | |
462 | async->buf_page_list = NULL; | |
463 | async->n_buf_pages = 0; | |
464 | } | |
b6c77757 | 465 | /* allocate new buffer */ |
ed9eccbe DS |
466 | if (new_size) { |
467 | unsigned i = 0; | |
468 | unsigned n_pages = new_size >> PAGE_SHIFT; | |
469 | struct page **pages = NULL; | |
470 | ||
471 | async->buf_page_list = | |
5b84cc78 | 472 | vzalloc(sizeof(struct comedi_buf_page) * n_pages); |
3ad4e219 | 473 | if (async->buf_page_list) |
ed9eccbe | 474 | pages = vmalloc(sizeof(struct page *) * n_pages); |
3ad4e219 | 475 | |
ed9eccbe DS |
476 | if (pages) { |
477 | for (i = 0; i < n_pages; i++) { | |
478 | if (s->async_dma_dir != DMA_NONE) { | |
479 | async->buf_page_list[i].virt_addr = | |
0a85b6f0 MT |
480 | dma_alloc_coherent(dev->hw_dev, |
481 | PAGE_SIZE, | |
482 | &async-> | |
483 | buf_page_list | |
484 | [i].dma_addr, | |
485 | GFP_KERNEL | | |
486 | __GFP_COMP); | |
ed9eccbe DS |
487 | } else { |
488 | async->buf_page_list[i].virt_addr = | |
0a85b6f0 MT |
489 | (void *) |
490 | get_zeroed_page(GFP_KERNEL); | |
ed9eccbe | 491 | } |
5617f9da | 492 | if (async->buf_page_list[i].virt_addr == NULL) |
ed9eccbe | 493 | break; |
5617f9da | 494 | |
be29eac8 | 495 | set_bit(PG_reserved, |
88ab8a84 XF |
496 | &(virt_to_page(async->buf_page_list[i]. |
497 | virt_addr)->flags)); | |
498 | pages[i] = virt_to_page(async->buf_page_list[i]. | |
499 | virt_addr); | |
ed9eccbe DS |
500 | } |
501 | } | |
502 | if (i == n_pages) { | |
503 | async->prealloc_buf = | |
408093d2 | 504 | #ifdef PAGE_KERNEL_NOCACHE |
0a85b6f0 | 505 | vmap(pages, n_pages, VM_MAP, PAGE_KERNEL_NOCACHE); |
408093d2 GKH |
506 | #else |
507 | vmap(pages, n_pages, VM_MAP, PAGE_KERNEL); | |
508 | #endif | |
ed9eccbe | 509 | } |
b455073c F |
510 | vfree(pages); |
511 | ||
ed9eccbe DS |
512 | if (async->prealloc_buf == NULL) { |
513 | /* Some allocation failed above. */ | |
514 | if (async->buf_page_list) { | |
515 | for (i = 0; i < n_pages; i++) { | |
516 | if (async->buf_page_list[i].virt_addr == | |
0a85b6f0 | 517 | NULL) { |
ed9eccbe DS |
518 | break; |
519 | } | |
88ab8a84 XF |
520 | clear_bit(PG_reserved, |
521 | &(virt_to_page(async-> | |
522 | buf_page_list[i]. | |
523 | virt_addr)->flags)); | |
ed9eccbe DS |
524 | if (s->async_dma_dir != DMA_NONE) { |
525 | dma_free_coherent(dev->hw_dev, | |
0a85b6f0 MT |
526 | PAGE_SIZE, |
527 | async-> | |
528 | buf_page_list | |
529 | [i].virt_addr, | |
530 | async-> | |
531 | buf_page_list | |
532 | [i].dma_addr); | |
ed9eccbe | 533 | } else { |
0a85b6f0 MT |
534 | free_page((unsigned long) |
535 | async->buf_page_list | |
536 | [i].virt_addr); | |
ed9eccbe DS |
537 | } |
538 | } | |
539 | vfree(async->buf_page_list); | |
540 | async->buf_page_list = NULL; | |
541 | } | |
542 | return -ENOMEM; | |
543 | } | |
544 | async->n_buf_pages = n_pages; | |
545 | } | |
546 | async->prealloc_bufsz = new_size; | |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
551 | /* munging is applied to data by core as it passes between user | |
552 | * and kernel space */ | |
7029a874 GKH |
553 | static unsigned int comedi_buf_munge(struct comedi_async *async, |
554 | unsigned int num_bytes) | |
ed9eccbe | 555 | { |
34c43922 | 556 | struct comedi_subdevice *s = async->subdevice; |
ed9eccbe DS |
557 | unsigned int count = 0; |
558 | const unsigned num_sample_bytes = bytes_per_sample(s); | |
559 | ||
560 | if (s->munge == NULL || (async->cmd.flags & CMDF_RAWDATA)) { | |
561 | async->munge_count += num_bytes; | |
2961f24f | 562 | BUG_ON((int)(async->munge_count - async->buf_write_count) > 0); |
ed9eccbe DS |
563 | return num_bytes; |
564 | } | |
565 | /* don't munge partial samples */ | |
566 | num_bytes -= num_bytes % num_sample_bytes; | |
567 | while (count < num_bytes) { | |
568 | int block_size; | |
569 | ||
570 | block_size = num_bytes - count; | |
571 | if (block_size < 0) { | |
67b0e64a MR |
572 | printk(KERN_WARNING |
573 | "%s: %s: bug! block_size is negative\n", | |
0a85b6f0 | 574 | __FILE__, __func__); |
ed9eccbe DS |
575 | break; |
576 | } | |
577 | if ((int)(async->munge_ptr + block_size - | |
0a85b6f0 | 578 | async->prealloc_bufsz) > 0) |
ed9eccbe DS |
579 | block_size = async->prealloc_bufsz - async->munge_ptr; |
580 | ||
581 | s->munge(s->device, s, async->prealloc_buf + async->munge_ptr, | |
0a85b6f0 | 582 | block_size, async->munge_chan); |
ed9eccbe | 583 | |
ac4898a0 ZR |
584 | smp_wmb(); /* barrier insures data is munged in buffer |
585 | * before munge_count is incremented */ | |
ed9eccbe DS |
586 | |
587 | async->munge_chan += block_size / num_sample_bytes; | |
588 | async->munge_chan %= async->cmd.chanlist_len; | |
589 | async->munge_count += block_size; | |
590 | async->munge_ptr += block_size; | |
591 | async->munge_ptr %= async->prealloc_bufsz; | |
592 | count += block_size; | |
593 | } | |
2961f24f | 594 | BUG_ON((int)(async->munge_count - async->buf_write_count) > 0); |
ed9eccbe DS |
595 | return count; |
596 | } | |
597 | ||
d163679c | 598 | unsigned int comedi_buf_write_n_available(struct comedi_async *async) |
ed9eccbe DS |
599 | { |
600 | unsigned int free_end; | |
601 | unsigned int nbytes; | |
602 | ||
603 | if (async == NULL) | |
604 | return 0; | |
605 | ||
606 | free_end = async->buf_read_count + async->prealloc_bufsz; | |
607 | nbytes = free_end - async->buf_write_alloc_count; | |
608 | nbytes -= nbytes % bytes_per_sample(async->subdevice); | |
609 | /* barrier insures the read of buf_read_count in this | |
610 | query occurs before any following writes to the buffer which | |
611 | might be based on the return value from this query. | |
612 | */ | |
613 | smp_mb(); | |
614 | return nbytes; | |
615 | } | |
616 | ||
617 | /* allocates chunk for the writer from free buffer space */ | |
0a85b6f0 MT |
618 | unsigned int comedi_buf_write_alloc(struct comedi_async *async, |
619 | unsigned int nbytes) | |
ed9eccbe DS |
620 | { |
621 | unsigned int free_end = async->buf_read_count + async->prealloc_bufsz; | |
622 | ||
5617f9da | 623 | if ((int)(async->buf_write_alloc_count + nbytes - free_end) > 0) |
ed9eccbe | 624 | nbytes = free_end - async->buf_write_alloc_count; |
5617f9da | 625 | |
ed9eccbe DS |
626 | async->buf_write_alloc_count += nbytes; |
627 | /* barrier insures the read of buf_read_count above occurs before | |
628 | we write data to the write-alloc'ed buffer space */ | |
629 | smp_mb(); | |
630 | return nbytes; | |
631 | } | |
d58214b0 | 632 | EXPORT_SYMBOL(comedi_buf_write_alloc); |
ed9eccbe DS |
633 | |
634 | /* allocates nothing unless it can completely fulfill the request */ | |
d163679c | 635 | unsigned int comedi_buf_write_alloc_strict(struct comedi_async *async, |
0a85b6f0 | 636 | unsigned int nbytes) |
ed9eccbe DS |
637 | { |
638 | unsigned int free_end = async->buf_read_count + async->prealloc_bufsz; | |
639 | ||
5617f9da | 640 | if ((int)(async->buf_write_alloc_count + nbytes - free_end) > 0) |
ed9eccbe | 641 | nbytes = 0; |
5617f9da | 642 | |
ed9eccbe DS |
643 | async->buf_write_alloc_count += nbytes; |
644 | /* barrier insures the read of buf_read_count above occurs before | |
645 | we write data to the write-alloc'ed buffer space */ | |
646 | smp_mb(); | |
647 | return nbytes; | |
648 | } | |
649 | ||
650 | /* transfers a chunk from writer to filled buffer space */ | |
d163679c | 651 | unsigned comedi_buf_write_free(struct comedi_async *async, unsigned int nbytes) |
ed9eccbe DS |
652 | { |
653 | if ((int)(async->buf_write_count + nbytes - | |
0a85b6f0 | 654 | async->buf_write_alloc_count) > 0) { |
88ab8a84 | 655 | printk(KERN_INFO "comedi: attempted to write-free more bytes than have been write-allocated.\n"); |
ed9eccbe DS |
656 | nbytes = async->buf_write_alloc_count - async->buf_write_count; |
657 | } | |
658 | async->buf_write_count += nbytes; | |
659 | async->buf_write_ptr += nbytes; | |
660 | comedi_buf_munge(async, async->buf_write_count - async->munge_count); | |
5617f9da | 661 | if (async->buf_write_ptr >= async->prealloc_bufsz) |
ed9eccbe | 662 | async->buf_write_ptr %= async->prealloc_bufsz; |
5617f9da | 663 | |
ed9eccbe DS |
664 | return nbytes; |
665 | } | |
d58214b0 | 666 | EXPORT_SYMBOL(comedi_buf_write_free); |
ed9eccbe DS |
667 | |
668 | /* allocates a chunk for the reader from filled (and munged) buffer space */ | |
d163679c | 669 | unsigned comedi_buf_read_alloc(struct comedi_async *async, unsigned nbytes) |
ed9eccbe DS |
670 | { |
671 | if ((int)(async->buf_read_alloc_count + nbytes - async->munge_count) > | |
0a85b6f0 | 672 | 0) { |
ed9eccbe DS |
673 | nbytes = async->munge_count - async->buf_read_alloc_count; |
674 | } | |
675 | async->buf_read_alloc_count += nbytes; | |
676 | /* barrier insures read of munge_count occurs before we actually read | |
677 | data out of buffer */ | |
678 | smp_rmb(); | |
679 | return nbytes; | |
680 | } | |
d58214b0 | 681 | EXPORT_SYMBOL(comedi_buf_read_alloc); |
ed9eccbe DS |
682 | |
683 | /* transfers control of a chunk from reader to free buffer space */ | |
d163679c | 684 | unsigned comedi_buf_read_free(struct comedi_async *async, unsigned int nbytes) |
ed9eccbe | 685 | { |
ac4898a0 ZR |
686 | /* barrier insures data has been read out of |
687 | * buffer before read count is incremented */ | |
ed9eccbe DS |
688 | smp_mb(); |
689 | if ((int)(async->buf_read_count + nbytes - | |
0a85b6f0 | 690 | async->buf_read_alloc_count) > 0) { |
67b0e64a MR |
691 | printk(KERN_INFO |
692 | "comedi: attempted to read-free more bytes than have been read-allocated.\n"); | |
ed9eccbe DS |
693 | nbytes = async->buf_read_alloc_count - async->buf_read_count; |
694 | } | |
695 | async->buf_read_count += nbytes; | |
696 | async->buf_read_ptr += nbytes; | |
697 | async->buf_read_ptr %= async->prealloc_bufsz; | |
698 | return nbytes; | |
699 | } | |
d58214b0 | 700 | EXPORT_SYMBOL(comedi_buf_read_free); |
ed9eccbe | 701 | |
d163679c | 702 | void comedi_buf_memcpy_to(struct comedi_async *async, unsigned int offset, |
0a85b6f0 | 703 | const void *data, unsigned int num_bytes) |
ed9eccbe DS |
704 | { |
705 | unsigned int write_ptr = async->buf_write_ptr + offset; | |
706 | ||
707 | if (write_ptr >= async->prealloc_bufsz) | |
708 | write_ptr %= async->prealloc_bufsz; | |
709 | ||
710 | while (num_bytes) { | |
711 | unsigned int block_size; | |
712 | ||
713 | if (write_ptr + num_bytes > async->prealloc_bufsz) | |
714 | block_size = async->prealloc_bufsz - write_ptr; | |
715 | else | |
716 | block_size = num_bytes; | |
717 | ||
718 | memcpy(async->prealloc_buf + write_ptr, data, block_size); | |
719 | ||
720 | data += block_size; | |
721 | num_bytes -= block_size; | |
722 | ||
723 | write_ptr = 0; | |
724 | } | |
725 | } | |
d58214b0 | 726 | EXPORT_SYMBOL(comedi_buf_memcpy_to); |
ed9eccbe | 727 | |
d163679c | 728 | void comedi_buf_memcpy_from(struct comedi_async *async, unsigned int offset, |
0a85b6f0 | 729 | void *dest, unsigned int nbytes) |
ed9eccbe DS |
730 | { |
731 | void *src; | |
732 | unsigned int read_ptr = async->buf_read_ptr + offset; | |
733 | ||
734 | if (read_ptr >= async->prealloc_bufsz) | |
735 | read_ptr %= async->prealloc_bufsz; | |
736 | ||
737 | while (nbytes) { | |
738 | unsigned int block_size; | |
739 | ||
740 | src = async->prealloc_buf + read_ptr; | |
741 | ||
742 | if (nbytes >= async->prealloc_bufsz - read_ptr) | |
743 | block_size = async->prealloc_bufsz - read_ptr; | |
744 | else | |
745 | block_size = nbytes; | |
746 | ||
747 | memcpy(dest, src, block_size); | |
748 | nbytes -= block_size; | |
749 | dest += block_size; | |
750 | read_ptr = 0; | |
751 | } | |
752 | } | |
d58214b0 | 753 | EXPORT_SYMBOL(comedi_buf_memcpy_from); |
ed9eccbe | 754 | |
d163679c | 755 | unsigned int comedi_buf_read_n_available(struct comedi_async *async) |
ed9eccbe DS |
756 | { |
757 | unsigned num_bytes; | |
758 | ||
759 | if (async == NULL) | |
760 | return 0; | |
761 | num_bytes = async->munge_count - async->buf_read_count; | |
762 | /* barrier insures the read of munge_count in this | |
763 | query occurs before any following reads of the buffer which | |
764 | might be based on the return value from this query. | |
765 | */ | |
766 | smp_rmb(); | |
767 | return num_bytes; | |
768 | } | |
d58214b0 | 769 | EXPORT_SYMBOL(comedi_buf_read_n_available); |
ed9eccbe | 770 | |
d163679c | 771 | int comedi_buf_get(struct comedi_async *async, short *x) |
ed9eccbe DS |
772 | { |
773 | unsigned int n = comedi_buf_read_n_available(async); | |
774 | ||
790c5541 | 775 | if (n < sizeof(short)) |
ed9eccbe | 776 | return 0; |
790c5541 | 777 | comedi_buf_read_alloc(async, sizeof(short)); |
0a85b6f0 | 778 | *x = *(short *)(async->prealloc_buf + async->buf_read_ptr); |
790c5541 | 779 | comedi_buf_read_free(async, sizeof(short)); |
ed9eccbe DS |
780 | return 1; |
781 | } | |
d58214b0 | 782 | EXPORT_SYMBOL(comedi_buf_get); |
ed9eccbe | 783 | |
d163679c | 784 | int comedi_buf_put(struct comedi_async *async, short x) |
ed9eccbe | 785 | { |
790c5541 | 786 | unsigned int n = comedi_buf_write_alloc_strict(async, sizeof(short)); |
ed9eccbe | 787 | |
790c5541 | 788 | if (n < sizeof(short)) { |
ed9eccbe DS |
789 | async->events |= COMEDI_CB_ERROR; |
790 | return 0; | |
791 | } | |
0a85b6f0 | 792 | *(short *)(async->prealloc_buf + async->buf_write_ptr) = x; |
790c5541 | 793 | comedi_buf_write_free(async, sizeof(short)); |
ed9eccbe DS |
794 | return 1; |
795 | } | |
d58214b0 | 796 | EXPORT_SYMBOL(comedi_buf_put); |
ed9eccbe | 797 | |
d163679c | 798 | void comedi_reset_async_buf(struct comedi_async *async) |
ed9eccbe DS |
799 | { |
800 | async->buf_write_alloc_count = 0; | |
801 | async->buf_write_count = 0; | |
802 | async->buf_read_alloc_count = 0; | |
803 | async->buf_read_count = 0; | |
804 | ||
805 | async->buf_write_ptr = 0; | |
806 | async->buf_read_ptr = 0; | |
807 | ||
808 | async->cur_chan = 0; | |
809 | async->scan_progress = 0; | |
810 | async->munge_chan = 0; | |
811 | async->munge_count = 0; | |
812 | async->munge_ptr = 0; | |
813 | ||
814 | async->events = 0; | |
815 | } | |
816 | ||
f4011670 IA |
817 | static int |
818 | comedi_auto_config_helper(struct device *hardware_device, | |
819 | struct comedi_driver *driver, | |
820 | int (*attach_wrapper) (struct comedi_device *, | |
821 | void *), void *context) | |
822 | { | |
823 | int minor; | |
824 | struct comedi_device_file_info *dev_file_info; | |
825 | struct comedi_device *comedi_dev; | |
826 | int ret; | |
827 | ||
828 | if (!comedi_autoconfig) | |
829 | return 0; | |
830 | ||
831 | minor = comedi_alloc_board_minor(hardware_device); | |
832 | if (minor < 0) | |
833 | return minor; | |
834 | ||
835 | dev_file_info = comedi_get_device_file_info(minor); | |
836 | comedi_dev = dev_file_info->device; | |
837 | ||
838 | mutex_lock(&comedi_dev->mutex); | |
839 | if (comedi_dev->attached) | |
840 | ret = -EBUSY; | |
841 | else if (!try_module_get(driver->module)) { | |
842 | printk(KERN_INFO "comedi: failed to increment module count\n"); | |
843 | ret = -EIO; | |
844 | } else { | |
845 | /* set comedi_dev->driver here for attach wrapper */ | |
846 | comedi_dev->driver = driver; | |
847 | ret = (*attach_wrapper)(comedi_dev, context); | |
848 | if (ret < 0) { | |
849 | module_put(driver->module); | |
850 | __comedi_device_detach(comedi_dev); | |
851 | } else { | |
852 | ret = comedi_device_postconfig(comedi_dev); | |
853 | } | |
854 | } | |
855 | mutex_unlock(&comedi_dev->mutex); | |
856 | ||
857 | if (ret < 0) | |
858 | comedi_free_board_minor(minor); | |
859 | return ret; | |
860 | } | |
861 | ||
cf938c24 IA |
862 | static int comedi_auto_config_wrapper(struct comedi_device *dev, void *context) |
863 | { | |
864 | struct comedi_devconfig *it = context; | |
865 | struct comedi_driver *driv = dev->driver; | |
866 | ||
867 | if (driv->num_names) { | |
868 | /* look for generic board entry matching driver name, which | |
869 | * has already been copied to it->board_name */ | |
870 | dev->board_ptr = comedi_recognize(driv, it->board_name); | |
871 | if (dev->board_ptr == NULL) { | |
872 | printk(KERN_WARNING | |
873 | "comedi: auto config failed to find board entry" | |
874 | " '%s' for driver '%s'\n", it->board_name, | |
875 | driv->driver_name); | |
876 | comedi_report_boards(driv); | |
877 | return -EINVAL; | |
878 | } | |
879 | } | |
880 | return driv->attach(dev, it); | |
881 | } | |
882 | ||
7029a874 | 883 | static int comedi_auto_config(struct device *hardware_device, |
63bf3d11 | 884 | struct comedi_driver *driver, const int *options, |
7029a874 | 885 | unsigned num_options) |
ed9eccbe | 886 | { |
0707bb04 | 887 | struct comedi_devconfig it; |
ed9eccbe DS |
888 | |
889 | memset(&it, 0, sizeof(it)); | |
63bf3d11 | 890 | strncpy(it.board_name, driver->driver_name, COMEDI_NAMELEN); |
ed9eccbe DS |
891 | it.board_name[COMEDI_NAMELEN - 1] = '\0'; |
892 | BUG_ON(num_options > COMEDI_NDEVCONFOPTS); | |
893 | memcpy(it.options, options, num_options * sizeof(int)); | |
cf938c24 IA |
894 | return comedi_auto_config_helper(hardware_device, driver, |
895 | comedi_auto_config_wrapper, &it); | |
ed9eccbe DS |
896 | } |
897 | ||
7029a874 | 898 | static void comedi_auto_unconfig(struct device *hardware_device) |
ed9eccbe | 899 | { |
c43435d7 | 900 | int minor; |
ed9eccbe | 901 | |
c43435d7 IA |
902 | if (hardware_device == NULL) |
903 | return; | |
904 | minor = comedi_find_board_minor(hardware_device); | |
905 | if (minor < 0) | |
906 | return; | |
907 | BUG_ON(minor >= COMEDI_NUM_BOARD_MINORS); | |
908 | comedi_free_board_minor(minor); | |
ed9eccbe DS |
909 | } |
910 | ||
55c03cff HS |
911 | /** |
912 | * comedi_pci_enable() - Enable the PCI device and request the regions. | |
913 | * @pdev: pci_dev struct | |
914 | * @res_name: name for the requested reqource | |
915 | */ | |
916 | int comedi_pci_enable(struct pci_dev *pdev, const char *res_name) | |
917 | { | |
918 | int rc; | |
919 | ||
920 | rc = pci_enable_device(pdev); | |
921 | if (rc < 0) | |
922 | return rc; | |
923 | ||
924 | rc = pci_request_regions(pdev, res_name); | |
925 | if (rc < 0) | |
926 | pci_disable_device(pdev); | |
927 | ||
928 | return rc; | |
929 | } | |
930 | EXPORT_SYMBOL_GPL(comedi_pci_enable); | |
931 | ||
932 | /** | |
933 | * comedi_pci_disable() - Release the regions and disable the PCI device. | |
934 | * @pdev: pci_dev struct | |
935 | * | |
936 | * This must be matched with a previous successful call to comedi_pci_enable(). | |
937 | */ | |
938 | void comedi_pci_disable(struct pci_dev *pdev) | |
939 | { | |
940 | pci_release_regions(pdev); | |
941 | pci_disable_device(pdev); | |
942 | } | |
943 | EXPORT_SYMBOL_GPL(comedi_pci_disable); | |
944 | ||
f4011670 IA |
945 | static int comedi_old_pci_auto_config(struct pci_dev *pcidev, |
946 | struct comedi_driver *driver) | |
ed9eccbe DS |
947 | { |
948 | int options[2]; | |
949 | ||
b6c77757 | 950 | /* pci bus */ |
ed9eccbe | 951 | options[0] = pcidev->bus->number; |
b6c77757 | 952 | /* pci slot */ |
ed9eccbe DS |
953 | options[1] = PCI_SLOT(pcidev->devfn); |
954 | ||
63bf3d11 | 955 | return comedi_auto_config(&pcidev->dev, driver, |
8629efa4 | 956 | options, ARRAY_SIZE(options)); |
ed9eccbe | 957 | } |
f4011670 IA |
958 | |
959 | static int comedi_pci_attach_wrapper(struct comedi_device *dev, void *pcidev) | |
960 | { | |
961 | return dev->driver->attach_pci(dev, pcidev); | |
962 | } | |
963 | ||
964 | static int comedi_new_pci_auto_config(struct pci_dev *pcidev, | |
965 | struct comedi_driver *driver) | |
966 | { | |
967 | return comedi_auto_config_helper(&pcidev->dev, driver, | |
968 | comedi_pci_attach_wrapper, pcidev); | |
969 | } | |
970 | ||
971 | int comedi_pci_auto_config(struct pci_dev *pcidev, struct comedi_driver *driver) | |
972 | { | |
973 | ||
974 | if (driver->attach_pci) | |
975 | return comedi_new_pci_auto_config(pcidev, driver); | |
976 | else | |
977 | return comedi_old_pci_auto_config(pcidev, driver); | |
978 | } | |
4bf93559 | 979 | EXPORT_SYMBOL_GPL(comedi_pci_auto_config); |
ed9eccbe DS |
980 | |
981 | void comedi_pci_auto_unconfig(struct pci_dev *pcidev) | |
982 | { | |
983 | comedi_auto_unconfig(&pcidev->dev); | |
984 | } | |
4bf93559 | 985 | EXPORT_SYMBOL_GPL(comedi_pci_auto_unconfig); |
c28264da | 986 | |
d4899c6f HS |
987 | int comedi_pci_driver_register(struct comedi_driver *comedi_driver, |
988 | struct pci_driver *pci_driver) | |
989 | { | |
990 | int ret; | |
991 | ||
992 | ret = comedi_driver_register(comedi_driver); | |
993 | if (ret < 0) | |
994 | return ret; | |
995 | ||
996 | /* FIXME: Remove this test after auditing all comedi pci drivers */ | |
997 | if (!pci_driver->name) | |
998 | pci_driver->name = comedi_driver->driver_name; | |
999 | ||
1000 | ret = pci_register_driver(pci_driver); | |
1001 | if (ret < 0) { | |
1002 | comedi_driver_unregister(comedi_driver); | |
1003 | return ret; | |
1004 | } | |
1005 | ||
1006 | return 0; | |
1007 | } | |
1008 | EXPORT_SYMBOL_GPL(comedi_pci_driver_register); | |
1009 | ||
1010 | void comedi_pci_driver_unregister(struct comedi_driver *comedi_driver, | |
1011 | struct pci_driver *pci_driver) | |
1012 | { | |
1013 | pci_unregister_driver(pci_driver); | |
1014 | comedi_driver_unregister(comedi_driver); | |
1015 | } | |
1016 | EXPORT_SYMBOL_GPL(comedi_pci_driver_unregister); | |
1017 | ||
f4011670 IA |
1018 | static int comedi_old_usb_auto_config(struct usb_interface *intf, |
1019 | struct comedi_driver *driver) | |
1020 | { | |
63bf3d11 | 1021 | return comedi_auto_config(&intf->dev, driver, NULL, 0); |
f4011670 IA |
1022 | } |
1023 | ||
1024 | static int comedi_usb_attach_wrapper(struct comedi_device *dev, void *intf) | |
1025 | { | |
1026 | return dev->driver->attach_usb(dev, intf); | |
1027 | } | |
1028 | ||
1029 | static int comedi_new_usb_auto_config(struct usb_interface *intf, | |
1030 | struct comedi_driver *driver) | |
1031 | { | |
1032 | return comedi_auto_config_helper(&intf->dev, driver, | |
1033 | comedi_usb_attach_wrapper, intf); | |
1034 | } | |
1035 | ||
d8b6ca08 | 1036 | int comedi_usb_auto_config(struct usb_interface *intf, |
4c093a6d | 1037 | struct comedi_driver *driver) |
c28264da | 1038 | { |
d8b6ca08 | 1039 | BUG_ON(intf == NULL); |
f4011670 IA |
1040 | if (driver->attach_usb) |
1041 | return comedi_new_usb_auto_config(intf, driver); | |
1042 | else | |
1043 | return comedi_old_usb_auto_config(intf, driver); | |
c28264da | 1044 | } |
4bf93559 | 1045 | EXPORT_SYMBOL_GPL(comedi_usb_auto_config); |
c28264da | 1046 | |
d8b6ca08 | 1047 | void comedi_usb_auto_unconfig(struct usb_interface *intf) |
c28264da | 1048 | { |
d8b6ca08 IA |
1049 | BUG_ON(intf == NULL); |
1050 | comedi_auto_unconfig(&intf->dev); | |
c28264da | 1051 | } |
4bf93559 | 1052 | EXPORT_SYMBOL_GPL(comedi_usb_auto_unconfig); |
64255031 HS |
1053 | |
1054 | int comedi_usb_driver_register(struct comedi_driver *comedi_driver, | |
1055 | struct usb_driver *usb_driver) | |
1056 | { | |
1057 | int ret; | |
1058 | ||
1059 | ret = comedi_driver_register(comedi_driver); | |
1060 | if (ret < 0) | |
1061 | return ret; | |
1062 | ||
1063 | ret = usb_register(usb_driver); | |
1064 | if (ret < 0) { | |
1065 | comedi_driver_unregister(comedi_driver); | |
1066 | return ret; | |
1067 | } | |
1068 | ||
1069 | return 0; | |
1070 | } | |
1071 | EXPORT_SYMBOL_GPL(comedi_usb_driver_register); | |
1072 | ||
1073 | void comedi_usb_driver_unregister(struct comedi_driver *comedi_driver, | |
1074 | struct usb_driver *usb_driver) | |
1075 | { | |
1076 | usb_deregister(usb_driver); | |
1077 | comedi_driver_unregister(comedi_driver); | |
1078 | } | |
1079 | EXPORT_SYMBOL_GPL(comedi_usb_driver_unregister); |