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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 | |
8b9ba6e5 | 59 | int comedi_alloc_subdevices(struct comedi_device *dev, int num_subdevices) |
2f0b9d08 | 60 | { |
8b9ba6e5 | 61 | int i; |
2f0b9d08 HS |
62 | |
63 | dev->n_subdevices = num_subdevices; | |
64 | dev->subdevices = | |
65 | kcalloc(num_subdevices, sizeof(struct comedi_subdevice), | |
66 | GFP_KERNEL); | |
67 | if (!dev->subdevices) | |
68 | return -ENOMEM; | |
69 | for (i = 0; i < num_subdevices; ++i) { | |
70 | dev->subdevices[i].device = dev; | |
71 | dev->subdevices[i].async_dma_dir = DMA_NONE; | |
72 | spin_lock_init(&dev->subdevices[i].spin_lock); | |
73 | dev->subdevices[i].minor = -1; | |
74 | } | |
75 | return 0; | |
76 | } | |
77 | EXPORT_SYMBOL_GPL(comedi_alloc_subdevices); | |
78 | ||
71b5f4f1 | 79 | static void cleanup_device(struct comedi_device *dev) |
ed9eccbe DS |
80 | { |
81 | int i; | |
34c43922 | 82 | struct comedi_subdevice *s; |
ed9eccbe DS |
83 | |
84 | if (dev->subdevices) { | |
85 | for (i = 0; i < dev->n_subdevices; i++) { | |
86 | s = dev->subdevices + i; | |
87 | comedi_free_subdevice_minor(s); | |
88 | if (s->async) { | |
89 | comedi_buf_alloc(dev, s, 0); | |
90 | kfree(s->async); | |
91 | } | |
92 | } | |
93 | kfree(dev->subdevices); | |
94 | dev->subdevices = NULL; | |
95 | dev->n_subdevices = 0; | |
96 | } | |
dedd1325 BP |
97 | kfree(dev->private); |
98 | dev->private = NULL; | |
7029a874 | 99 | dev->driver = NULL; |
ed9eccbe DS |
100 | dev->board_name = NULL; |
101 | dev->board_ptr = NULL; | |
102 | dev->iobase = 0; | |
103 | dev->irq = 0; | |
104 | dev->read_subdev = NULL; | |
105 | dev->write_subdev = NULL; | |
106 | dev->open = NULL; | |
107 | dev->close = NULL; | |
108 | comedi_set_hw_dev(dev, NULL); | |
109 | } | |
110 | ||
71b5f4f1 | 111 | static void __comedi_device_detach(struct comedi_device *dev) |
ed9eccbe DS |
112 | { |
113 | dev->attached = 0; | |
5617f9da | 114 | if (dev->driver) |
ed9eccbe | 115 | dev->driver->detach(dev); |
5617f9da | 116 | else |
67b0e64a MR |
117 | printk(KERN_WARNING |
118 | "BUG: dev->driver=NULL in comedi_device_detach()\n"); | |
ed9eccbe DS |
119 | cleanup_device(dev); |
120 | } | |
121 | ||
71b5f4f1 | 122 | void comedi_device_detach(struct comedi_device *dev) |
ed9eccbe DS |
123 | { |
124 | if (!dev->attached) | |
125 | return; | |
126 | __comedi_device_detach(dev); | |
127 | } | |
128 | ||
3902a370 IA |
129 | /* do a little post-config cleanup */ |
130 | /* called with module refcount incremented, decrements it */ | |
131 | static int comedi_device_postconfig(struct comedi_device *dev) | |
132 | { | |
133 | int ret = postconfig(dev); | |
134 | module_put(dev->driver->module); | |
135 | if (ret < 0) { | |
136 | __comedi_device_detach(dev); | |
137 | return ret; | |
138 | } | |
139 | if (!dev->board_name) { | |
140 | printk(KERN_WARNING "BUG: dev->board_name=<%p>\n", | |
141 | dev->board_name); | |
142 | dev->board_name = "BUG"; | |
143 | } | |
144 | smp_wmb(); | |
145 | dev->attached = 1; | |
146 | return 0; | |
147 | } | |
148 | ||
0707bb04 | 149 | int comedi_device_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
ed9eccbe | 150 | { |
139dfbdf | 151 | struct comedi_driver *driv; |
ed9eccbe DS |
152 | int ret; |
153 | ||
154 | if (dev->attached) | |
155 | return -EBUSY; | |
156 | ||
157 | for (driv = comedi_drivers; driv; driv = driv->next) { | |
158 | if (!try_module_get(driv->module)) { | |
88ab8a84 | 159 | printk(KERN_INFO "comedi: failed to increment module count, skipping\n"); |
ed9eccbe DS |
160 | continue; |
161 | } | |
162 | if (driv->num_names) { | |
163 | dev->board_ptr = comedi_recognize(driv, it->board_name); | |
3902a370 IA |
164 | if (dev->board_ptr) |
165 | break; | |
166 | } else if (strcmp(driv->driver_name, it->board_name)) | |
167 | break; | |
168 | module_put(driv->module); | |
169 | } | |
170 | if (driv == NULL) { | |
171 | /* recognize has failed if we get here */ | |
172 | /* report valid board names before returning error */ | |
173 | for (driv = comedi_drivers; driv; driv = driv->next) { | |
174 | if (!try_module_get(driv->module)) { | |
175 | printk(KERN_INFO | |
176 | "comedi: failed to increment module count\n"); | |
ed9eccbe DS |
177 | continue; |
178 | } | |
3902a370 IA |
179 | comedi_report_boards(driv); |
180 | module_put(driv->module); | |
ed9eccbe | 181 | } |
3902a370 | 182 | return -EIO; |
ed9eccbe | 183 | } |
3902a370 IA |
184 | /* initialize dev->driver here so |
185 | * comedi_error() can be called from attach */ | |
186 | dev->driver = driv; | |
187 | ret = driv->attach(dev, it); | |
ed9eccbe | 188 | if (ret < 0) { |
3902a370 | 189 | module_put(dev->driver->module); |
ed9eccbe DS |
190 | __comedi_device_detach(dev); |
191 | return ret; | |
192 | } | |
3902a370 | 193 | return comedi_device_postconfig(dev); |
ed9eccbe DS |
194 | } |
195 | ||
139dfbdf | 196 | int comedi_driver_register(struct comedi_driver *driver) |
ed9eccbe DS |
197 | { |
198 | driver->next = comedi_drivers; | |
199 | comedi_drivers = driver; | |
200 | ||
201 | return 0; | |
202 | } | |
d58214b0 | 203 | EXPORT_SYMBOL(comedi_driver_register); |
ed9eccbe | 204 | |
139dfbdf | 205 | int comedi_driver_unregister(struct comedi_driver *driver) |
ed9eccbe | 206 | { |
139dfbdf | 207 | struct comedi_driver *prev; |
ed9eccbe DS |
208 | int i; |
209 | ||
210 | /* check for devices using this driver */ | |
211 | for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) { | |
0a85b6f0 MT |
212 | struct comedi_device_file_info *dev_file_info = |
213 | comedi_get_device_file_info(i); | |
71b5f4f1 | 214 | struct comedi_device *dev; |
ed9eccbe | 215 | |
0a85b6f0 MT |
216 | if (dev_file_info == NULL) |
217 | continue; | |
ed9eccbe DS |
218 | dev = dev_file_info->device; |
219 | ||
220 | mutex_lock(&dev->mutex); | |
221 | if (dev->attached && dev->driver == driver) { | |
222 | if (dev->use_count) | |
88ab8a84 XF |
223 | printk(KERN_WARNING "BUG! detaching device with use_count=%d\n", |
224 | dev->use_count); | |
ed9eccbe DS |
225 | comedi_device_detach(dev); |
226 | } | |
227 | mutex_unlock(&dev->mutex); | |
228 | } | |
229 | ||
230 | if (comedi_drivers == driver) { | |
231 | comedi_drivers = driver->next; | |
232 | return 0; | |
233 | } | |
234 | ||
235 | for (prev = comedi_drivers; prev->next; prev = prev->next) { | |
236 | if (prev->next == driver) { | |
237 | prev->next = driver->next; | |
238 | return 0; | |
239 | } | |
240 | } | |
241 | return -EINVAL; | |
242 | } | |
d58214b0 | 243 | EXPORT_SYMBOL(comedi_driver_unregister); |
ed9eccbe | 244 | |
71b5f4f1 | 245 | static int postconfig(struct comedi_device *dev) |
ed9eccbe DS |
246 | { |
247 | int i; | |
34c43922 | 248 | struct comedi_subdevice *s; |
d163679c | 249 | struct comedi_async *async = NULL; |
ed9eccbe DS |
250 | int ret; |
251 | ||
252 | for (i = 0; i < dev->n_subdevices; i++) { | |
253 | s = dev->subdevices + i; | |
254 | ||
255 | if (s->type == COMEDI_SUBD_UNUSED) | |
256 | continue; | |
257 | ||
258 | if (s->len_chanlist == 0) | |
259 | s->len_chanlist = 1; | |
260 | ||
261 | if (s->do_cmd) { | |
4d7df821 IA |
262 | unsigned int buf_size; |
263 | ||
ed9eccbe | 264 | BUG_ON((s->subdev_flags & (SDF_CMD_READ | |
0a85b6f0 | 265 | SDF_CMD_WRITE)) == 0); |
ed9eccbe DS |
266 | BUG_ON(!s->do_cmdtest); |
267 | ||
0a85b6f0 MT |
268 | async = |
269 | kzalloc(sizeof(struct comedi_async), GFP_KERNEL); | |
ed9eccbe | 270 | if (async == NULL) { |
67b0e64a MR |
271 | printk(KERN_INFO |
272 | "failed to allocate async struct\n"); | |
ed9eccbe DS |
273 | return -ENOMEM; |
274 | } | |
275 | init_waitqueue_head(&async->wait_head); | |
276 | async->subdevice = s; | |
277 | s->async = async; | |
278 | ||
4d7df821 IA |
279 | async->max_bufsize = |
280 | comedi_default_buf_maxsize_kb * 1024; | |
281 | buf_size = comedi_default_buf_size_kb * 1024; | |
282 | if (buf_size > async->max_bufsize) | |
283 | buf_size = async->max_bufsize; | |
ed9eccbe DS |
284 | |
285 | async->prealloc_buf = NULL; | |
286 | async->prealloc_bufsz = 0; | |
4d7df821 | 287 | if (comedi_buf_alloc(dev, s, buf_size) < 0) { |
ac4898a0 | 288 | printk(KERN_INFO "Buffer allocation failed\n"); |
ed9eccbe DS |
289 | return -ENOMEM; |
290 | } | |
291 | if (s->buf_change) { | |
4d7df821 | 292 | ret = s->buf_change(dev, s, buf_size); |
ed9eccbe DS |
293 | if (ret < 0) |
294 | return ret; | |
295 | } | |
296 | comedi_alloc_subdevice_minor(dev, s); | |
297 | } | |
298 | ||
299 | if (!s->range_table && !s->range_table_list) | |
300 | s->range_table = &range_unknown; | |
301 | ||
302 | if (!s->insn_read && s->insn_bits) | |
303 | s->insn_read = insn_rw_emulate_bits; | |
304 | if (!s->insn_write && s->insn_bits) | |
305 | s->insn_write = insn_rw_emulate_bits; | |
306 | ||
307 | if (!s->insn_read) | |
308 | s->insn_read = insn_inval; | |
309 | if (!s->insn_write) | |
310 | s->insn_write = insn_inval; | |
311 | if (!s->insn_bits) | |
312 | s->insn_bits = insn_inval; | |
313 | if (!s->insn_config) | |
314 | s->insn_config = insn_inval; | |
315 | ||
316 | if (!s->poll) | |
317 | s->poll = poll_invalid; | |
318 | } | |
319 | ||
320 | return 0; | |
321 | } | |
322 | ||
4e2f002f IA |
323 | /* |
324 | * Generic recognize function for drivers that register their supported | |
325 | * board names. | |
326 | * | |
327 | * 'driv->board_name' points to a 'const char *' member within the | |
328 | * zeroth element of an array of some private board information | |
329 | * structure, say 'struct foo_board' containing a member 'const char | |
330 | * *board_name' that is initialized to point to a board name string that | |
331 | * is one of the candidates matched against this function's 'name' | |
332 | * parameter. | |
333 | * | |
334 | * 'driv->offset' is the size of the private board information | |
335 | * structure, say 'sizeof(struct foo_board)', and 'driv->num_names' is | |
336 | * the length of the array of private board information structures. | |
337 | * | |
338 | * If one of the board names in the array of private board information | |
339 | * structures matches the name supplied to this function, the function | |
340 | * returns a pointer to the pointer to the board name, otherwise it | |
341 | * returns NULL. The return value ends up in the 'board_ptr' member of | |
342 | * a 'struct comedi_device' that the low-level comedi driver's | |
343 | * 'attach()' hook can convert to a point to a particular element of its | |
344 | * array of private board information structures by subtracting the | |
345 | * offset of the member that points to the board name. (No subtraction | |
346 | * is required if the board name pointer is the first member of the | |
347 | * private board information structure, which is generally the case.) | |
348 | */ | |
7029a874 | 349 | static void *comedi_recognize(struct comedi_driver *driv, const char *name) |
ed9eccbe | 350 | { |
1c9de58a DC |
351 | char **name_ptr = (char **)driv->board_name; |
352 | int i; | |
353 | ||
ed9eccbe DS |
354 | for (i = 0; i < driv->num_names; i++) { |
355 | if (strcmp(*name_ptr, name) == 0) | |
1c9de58a DC |
356 | return name_ptr; |
357 | name_ptr = (void *)name_ptr + driv->offset; | |
ed9eccbe DS |
358 | } |
359 | ||
360 | return NULL; | |
361 | } | |
362 | ||
7029a874 | 363 | static void comedi_report_boards(struct comedi_driver *driv) |
ed9eccbe DS |
364 | { |
365 | unsigned int i; | |
366 | const char *const *name_ptr; | |
367 | ||
ac4898a0 | 368 | printk(KERN_INFO "comedi: valid board names for %s driver are:\n", |
0a85b6f0 | 369 | driv->driver_name); |
ed9eccbe DS |
370 | |
371 | name_ptr = driv->board_name; | |
372 | for (i = 0; i < driv->num_names; i++) { | |
ac4898a0 | 373 | printk(KERN_INFO " %s\n", *name_ptr); |
ed9eccbe DS |
374 | name_ptr = (const char **)((char *)name_ptr + driv->offset); |
375 | } | |
376 | ||
377 | if (driv->num_names == 0) | |
ac4898a0 | 378 | printk(KERN_INFO " %s\n", driv->driver_name); |
ed9eccbe DS |
379 | } |
380 | ||
34c43922 | 381 | static int poll_invalid(struct comedi_device *dev, struct comedi_subdevice *s) |
ed9eccbe DS |
382 | { |
383 | return -EINVAL; | |
384 | } | |
385 | ||
34c43922 | 386 | int insn_inval(struct comedi_device *dev, struct comedi_subdevice *s, |
0a85b6f0 | 387 | struct comedi_insn *insn, unsigned int *data) |
ed9eccbe DS |
388 | { |
389 | return -EINVAL; | |
390 | } | |
391 | ||
0a85b6f0 MT |
392 | static int insn_rw_emulate_bits(struct comedi_device *dev, |
393 | struct comedi_subdevice *s, | |
394 | struct comedi_insn *insn, unsigned int *data) | |
ed9eccbe | 395 | { |
90035c08 | 396 | struct comedi_insn new_insn; |
ed9eccbe DS |
397 | int ret; |
398 | static const unsigned channels_per_bitfield = 32; | |
399 | ||
400 | unsigned chan = CR_CHAN(insn->chanspec); | |
401 | const unsigned base_bitfield_channel = | |
0a85b6f0 | 402 | (chan < channels_per_bitfield) ? 0 : chan; |
790c5541 | 403 | unsigned int new_data[2]; |
ed9eccbe DS |
404 | memset(new_data, 0, sizeof(new_data)); |
405 | memset(&new_insn, 0, sizeof(new_insn)); | |
406 | new_insn.insn = INSN_BITS; | |
407 | new_insn.chanspec = base_bitfield_channel; | |
408 | new_insn.n = 2; | |
409 | new_insn.data = new_data; | |
410 | new_insn.subdev = insn->subdev; | |
411 | ||
412 | if (insn->insn == INSN_WRITE) { | |
413 | if (!(s->subdev_flags & SDF_WRITABLE)) | |
414 | return -EINVAL; | |
aad4029a MR |
415 | new_data[0] = 1 << (chan - base_bitfield_channel); /* mask */ |
416 | new_data[1] = data[0] ? (1 << (chan - base_bitfield_channel)) | |
417 | : 0; /* bits */ | |
ed9eccbe DS |
418 | } |
419 | ||
420 | ret = s->insn_bits(dev, s, &new_insn, new_data); | |
421 | if (ret < 0) | |
422 | return ret; | |
423 | ||
5617f9da | 424 | if (insn->insn == INSN_READ) |
ed9eccbe | 425 | data[0] = (new_data[1] >> (chan - base_bitfield_channel)) & 1; |
ed9eccbe DS |
426 | |
427 | return 1; | |
428 | } | |
429 | ||
34c43922 | 430 | int comedi_buf_alloc(struct comedi_device *dev, struct comedi_subdevice *s, |
0a85b6f0 | 431 | unsigned long new_size) |
ed9eccbe | 432 | { |
d163679c | 433 | struct comedi_async *async = s->async; |
ed9eccbe DS |
434 | |
435 | /* Round up new_size to multiple of PAGE_SIZE */ | |
436 | new_size = (new_size + PAGE_SIZE - 1) & PAGE_MASK; | |
437 | ||
438 | /* if no change is required, do nothing */ | |
5617f9da | 439 | if (async->prealloc_buf && async->prealloc_bufsz == new_size) |
ed9eccbe | 440 | return 0; |
5617f9da | 441 | |
b6c77757 | 442 | /* deallocate old buffer */ |
ed9eccbe DS |
443 | if (async->prealloc_buf) { |
444 | vunmap(async->prealloc_buf); | |
445 | async->prealloc_buf = NULL; | |
446 | async->prealloc_bufsz = 0; | |
447 | } | |
448 | if (async->buf_page_list) { | |
449 | unsigned i; | |
450 | for (i = 0; i < async->n_buf_pages; ++i) { | |
451 | if (async->buf_page_list[i].virt_addr) { | |
88ab8a84 XF |
452 | clear_bit(PG_reserved, |
453 | &(virt_to_page(async->buf_page_list[i]. | |
454 | virt_addr)->flags)); | |
ed9eccbe DS |
455 | if (s->async_dma_dir != DMA_NONE) { |
456 | dma_free_coherent(dev->hw_dev, | |
0a85b6f0 MT |
457 | PAGE_SIZE, |
458 | async-> | |
459 | buf_page_list | |
460 | [i].virt_addr, | |
461 | async-> | |
462 | buf_page_list | |
463 | [i].dma_addr); | |
ed9eccbe | 464 | } else { |
0a85b6f0 MT |
465 | free_page((unsigned long) |
466 | async->buf_page_list[i]. | |
467 | virt_addr); | |
ed9eccbe DS |
468 | } |
469 | } | |
470 | } | |
471 | vfree(async->buf_page_list); | |
472 | async->buf_page_list = NULL; | |
473 | async->n_buf_pages = 0; | |
474 | } | |
b6c77757 | 475 | /* allocate new buffer */ |
ed9eccbe DS |
476 | if (new_size) { |
477 | unsigned i = 0; | |
478 | unsigned n_pages = new_size >> PAGE_SHIFT; | |
479 | struct page **pages = NULL; | |
480 | ||
481 | async->buf_page_list = | |
5b84cc78 | 482 | vzalloc(sizeof(struct comedi_buf_page) * n_pages); |
3ad4e219 | 483 | if (async->buf_page_list) |
ed9eccbe | 484 | pages = vmalloc(sizeof(struct page *) * n_pages); |
3ad4e219 | 485 | |
ed9eccbe DS |
486 | if (pages) { |
487 | for (i = 0; i < n_pages; i++) { | |
488 | if (s->async_dma_dir != DMA_NONE) { | |
489 | async->buf_page_list[i].virt_addr = | |
0a85b6f0 MT |
490 | dma_alloc_coherent(dev->hw_dev, |
491 | PAGE_SIZE, | |
492 | &async-> | |
493 | buf_page_list | |
494 | [i].dma_addr, | |
495 | GFP_KERNEL | | |
496 | __GFP_COMP); | |
ed9eccbe DS |
497 | } else { |
498 | async->buf_page_list[i].virt_addr = | |
0a85b6f0 MT |
499 | (void *) |
500 | get_zeroed_page(GFP_KERNEL); | |
ed9eccbe | 501 | } |
5617f9da | 502 | if (async->buf_page_list[i].virt_addr == NULL) |
ed9eccbe | 503 | break; |
5617f9da | 504 | |
be29eac8 | 505 | set_bit(PG_reserved, |
88ab8a84 XF |
506 | &(virt_to_page(async->buf_page_list[i]. |
507 | virt_addr)->flags)); | |
508 | pages[i] = virt_to_page(async->buf_page_list[i]. | |
509 | virt_addr); | |
ed9eccbe DS |
510 | } |
511 | } | |
512 | if (i == n_pages) { | |
513 | async->prealloc_buf = | |
408093d2 | 514 | #ifdef PAGE_KERNEL_NOCACHE |
0a85b6f0 | 515 | vmap(pages, n_pages, VM_MAP, PAGE_KERNEL_NOCACHE); |
408093d2 GKH |
516 | #else |
517 | vmap(pages, n_pages, VM_MAP, PAGE_KERNEL); | |
518 | #endif | |
ed9eccbe | 519 | } |
b455073c F |
520 | vfree(pages); |
521 | ||
ed9eccbe DS |
522 | if (async->prealloc_buf == NULL) { |
523 | /* Some allocation failed above. */ | |
524 | if (async->buf_page_list) { | |
525 | for (i = 0; i < n_pages; i++) { | |
526 | if (async->buf_page_list[i].virt_addr == | |
0a85b6f0 | 527 | NULL) { |
ed9eccbe DS |
528 | break; |
529 | } | |
88ab8a84 XF |
530 | clear_bit(PG_reserved, |
531 | &(virt_to_page(async-> | |
532 | buf_page_list[i]. | |
533 | virt_addr)->flags)); | |
ed9eccbe DS |
534 | if (s->async_dma_dir != DMA_NONE) { |
535 | dma_free_coherent(dev->hw_dev, | |
0a85b6f0 MT |
536 | PAGE_SIZE, |
537 | async-> | |
538 | buf_page_list | |
539 | [i].virt_addr, | |
540 | async-> | |
541 | buf_page_list | |
542 | [i].dma_addr); | |
ed9eccbe | 543 | } else { |
0a85b6f0 MT |
544 | free_page((unsigned long) |
545 | async->buf_page_list | |
546 | [i].virt_addr); | |
ed9eccbe DS |
547 | } |
548 | } | |
549 | vfree(async->buf_page_list); | |
550 | async->buf_page_list = NULL; | |
551 | } | |
552 | return -ENOMEM; | |
553 | } | |
554 | async->n_buf_pages = n_pages; | |
555 | } | |
556 | async->prealloc_bufsz = new_size; | |
557 | ||
558 | return 0; | |
559 | } | |
560 | ||
561 | /* munging is applied to data by core as it passes between user | |
562 | * and kernel space */ | |
7029a874 GKH |
563 | static unsigned int comedi_buf_munge(struct comedi_async *async, |
564 | unsigned int num_bytes) | |
ed9eccbe | 565 | { |
34c43922 | 566 | struct comedi_subdevice *s = async->subdevice; |
ed9eccbe DS |
567 | unsigned int count = 0; |
568 | const unsigned num_sample_bytes = bytes_per_sample(s); | |
569 | ||
570 | if (s->munge == NULL || (async->cmd.flags & CMDF_RAWDATA)) { | |
571 | async->munge_count += num_bytes; | |
2961f24f | 572 | BUG_ON((int)(async->munge_count - async->buf_write_count) > 0); |
ed9eccbe DS |
573 | return num_bytes; |
574 | } | |
575 | /* don't munge partial samples */ | |
576 | num_bytes -= num_bytes % num_sample_bytes; | |
577 | while (count < num_bytes) { | |
578 | int block_size; | |
579 | ||
580 | block_size = num_bytes - count; | |
581 | if (block_size < 0) { | |
67b0e64a MR |
582 | printk(KERN_WARNING |
583 | "%s: %s: bug! block_size is negative\n", | |
0a85b6f0 | 584 | __FILE__, __func__); |
ed9eccbe DS |
585 | break; |
586 | } | |
587 | if ((int)(async->munge_ptr + block_size - | |
0a85b6f0 | 588 | async->prealloc_bufsz) > 0) |
ed9eccbe DS |
589 | block_size = async->prealloc_bufsz - async->munge_ptr; |
590 | ||
591 | s->munge(s->device, s, async->prealloc_buf + async->munge_ptr, | |
0a85b6f0 | 592 | block_size, async->munge_chan); |
ed9eccbe | 593 | |
ac4898a0 ZR |
594 | smp_wmb(); /* barrier insures data is munged in buffer |
595 | * before munge_count is incremented */ | |
ed9eccbe DS |
596 | |
597 | async->munge_chan += block_size / num_sample_bytes; | |
598 | async->munge_chan %= async->cmd.chanlist_len; | |
599 | async->munge_count += block_size; | |
600 | async->munge_ptr += block_size; | |
601 | async->munge_ptr %= async->prealloc_bufsz; | |
602 | count += block_size; | |
603 | } | |
2961f24f | 604 | BUG_ON((int)(async->munge_count - async->buf_write_count) > 0); |
ed9eccbe DS |
605 | return count; |
606 | } | |
607 | ||
d163679c | 608 | unsigned int comedi_buf_write_n_available(struct comedi_async *async) |
ed9eccbe DS |
609 | { |
610 | unsigned int free_end; | |
611 | unsigned int nbytes; | |
612 | ||
613 | if (async == NULL) | |
614 | return 0; | |
615 | ||
616 | free_end = async->buf_read_count + async->prealloc_bufsz; | |
617 | nbytes = free_end - async->buf_write_alloc_count; | |
618 | nbytes -= nbytes % bytes_per_sample(async->subdevice); | |
619 | /* barrier insures the read of buf_read_count in this | |
620 | query occurs before any following writes to the buffer which | |
621 | might be based on the return value from this query. | |
622 | */ | |
623 | smp_mb(); | |
624 | return nbytes; | |
625 | } | |
626 | ||
627 | /* allocates chunk for the writer from free buffer space */ | |
0a85b6f0 MT |
628 | unsigned int comedi_buf_write_alloc(struct comedi_async *async, |
629 | unsigned int nbytes) | |
ed9eccbe DS |
630 | { |
631 | unsigned int free_end = async->buf_read_count + async->prealloc_bufsz; | |
632 | ||
5617f9da | 633 | if ((int)(async->buf_write_alloc_count + nbytes - free_end) > 0) |
ed9eccbe | 634 | nbytes = free_end - async->buf_write_alloc_count; |
5617f9da | 635 | |
ed9eccbe DS |
636 | async->buf_write_alloc_count += nbytes; |
637 | /* barrier insures the read of buf_read_count above occurs before | |
638 | we write data to the write-alloc'ed buffer space */ | |
639 | smp_mb(); | |
640 | return nbytes; | |
641 | } | |
d58214b0 | 642 | EXPORT_SYMBOL(comedi_buf_write_alloc); |
ed9eccbe DS |
643 | |
644 | /* allocates nothing unless it can completely fulfill the request */ | |
d163679c | 645 | unsigned int comedi_buf_write_alloc_strict(struct comedi_async *async, |
0a85b6f0 | 646 | unsigned int nbytes) |
ed9eccbe DS |
647 | { |
648 | unsigned int free_end = async->buf_read_count + async->prealloc_bufsz; | |
649 | ||
5617f9da | 650 | if ((int)(async->buf_write_alloc_count + nbytes - free_end) > 0) |
ed9eccbe | 651 | nbytes = 0; |
5617f9da | 652 | |
ed9eccbe DS |
653 | async->buf_write_alloc_count += nbytes; |
654 | /* barrier insures the read of buf_read_count above occurs before | |
655 | we write data to the write-alloc'ed buffer space */ | |
656 | smp_mb(); | |
657 | return nbytes; | |
658 | } | |
659 | ||
660 | /* transfers a chunk from writer to filled buffer space */ | |
d163679c | 661 | unsigned comedi_buf_write_free(struct comedi_async *async, unsigned int nbytes) |
ed9eccbe DS |
662 | { |
663 | if ((int)(async->buf_write_count + nbytes - | |
0a85b6f0 | 664 | async->buf_write_alloc_count) > 0) { |
88ab8a84 | 665 | printk(KERN_INFO "comedi: attempted to write-free more bytes than have been write-allocated.\n"); |
ed9eccbe DS |
666 | nbytes = async->buf_write_alloc_count - async->buf_write_count; |
667 | } | |
668 | async->buf_write_count += nbytes; | |
669 | async->buf_write_ptr += nbytes; | |
670 | comedi_buf_munge(async, async->buf_write_count - async->munge_count); | |
5617f9da | 671 | if (async->buf_write_ptr >= async->prealloc_bufsz) |
ed9eccbe | 672 | async->buf_write_ptr %= async->prealloc_bufsz; |
5617f9da | 673 | |
ed9eccbe DS |
674 | return nbytes; |
675 | } | |
d58214b0 | 676 | EXPORT_SYMBOL(comedi_buf_write_free); |
ed9eccbe DS |
677 | |
678 | /* allocates a chunk for the reader from filled (and munged) buffer space */ | |
d163679c | 679 | unsigned comedi_buf_read_alloc(struct comedi_async *async, unsigned nbytes) |
ed9eccbe DS |
680 | { |
681 | if ((int)(async->buf_read_alloc_count + nbytes - async->munge_count) > | |
0a85b6f0 | 682 | 0) { |
ed9eccbe DS |
683 | nbytes = async->munge_count - async->buf_read_alloc_count; |
684 | } | |
685 | async->buf_read_alloc_count += nbytes; | |
686 | /* barrier insures read of munge_count occurs before we actually read | |
687 | data out of buffer */ | |
688 | smp_rmb(); | |
689 | return nbytes; | |
690 | } | |
d58214b0 | 691 | EXPORT_SYMBOL(comedi_buf_read_alloc); |
ed9eccbe DS |
692 | |
693 | /* transfers control of a chunk from reader to free buffer space */ | |
d163679c | 694 | unsigned comedi_buf_read_free(struct comedi_async *async, unsigned int nbytes) |
ed9eccbe | 695 | { |
ac4898a0 ZR |
696 | /* barrier insures data has been read out of |
697 | * buffer before read count is incremented */ | |
ed9eccbe DS |
698 | smp_mb(); |
699 | if ((int)(async->buf_read_count + nbytes - | |
0a85b6f0 | 700 | async->buf_read_alloc_count) > 0) { |
67b0e64a MR |
701 | printk(KERN_INFO |
702 | "comedi: attempted to read-free more bytes than have been read-allocated.\n"); | |
ed9eccbe DS |
703 | nbytes = async->buf_read_alloc_count - async->buf_read_count; |
704 | } | |
705 | async->buf_read_count += nbytes; | |
706 | async->buf_read_ptr += nbytes; | |
707 | async->buf_read_ptr %= async->prealloc_bufsz; | |
708 | return nbytes; | |
709 | } | |
d58214b0 | 710 | EXPORT_SYMBOL(comedi_buf_read_free); |
ed9eccbe | 711 | |
d163679c | 712 | void comedi_buf_memcpy_to(struct comedi_async *async, unsigned int offset, |
0a85b6f0 | 713 | const void *data, unsigned int num_bytes) |
ed9eccbe DS |
714 | { |
715 | unsigned int write_ptr = async->buf_write_ptr + offset; | |
716 | ||
717 | if (write_ptr >= async->prealloc_bufsz) | |
718 | write_ptr %= async->prealloc_bufsz; | |
719 | ||
720 | while (num_bytes) { | |
721 | unsigned int block_size; | |
722 | ||
723 | if (write_ptr + num_bytes > async->prealloc_bufsz) | |
724 | block_size = async->prealloc_bufsz - write_ptr; | |
725 | else | |
726 | block_size = num_bytes; | |
727 | ||
728 | memcpy(async->prealloc_buf + write_ptr, data, block_size); | |
729 | ||
730 | data += block_size; | |
731 | num_bytes -= block_size; | |
732 | ||
733 | write_ptr = 0; | |
734 | } | |
735 | } | |
d58214b0 | 736 | EXPORT_SYMBOL(comedi_buf_memcpy_to); |
ed9eccbe | 737 | |
d163679c | 738 | void comedi_buf_memcpy_from(struct comedi_async *async, unsigned int offset, |
0a85b6f0 | 739 | void *dest, unsigned int nbytes) |
ed9eccbe DS |
740 | { |
741 | void *src; | |
742 | unsigned int read_ptr = async->buf_read_ptr + offset; | |
743 | ||
744 | if (read_ptr >= async->prealloc_bufsz) | |
745 | read_ptr %= async->prealloc_bufsz; | |
746 | ||
747 | while (nbytes) { | |
748 | unsigned int block_size; | |
749 | ||
750 | src = async->prealloc_buf + read_ptr; | |
751 | ||
752 | if (nbytes >= async->prealloc_bufsz - read_ptr) | |
753 | block_size = async->prealloc_bufsz - read_ptr; | |
754 | else | |
755 | block_size = nbytes; | |
756 | ||
757 | memcpy(dest, src, block_size); | |
758 | nbytes -= block_size; | |
759 | dest += block_size; | |
760 | read_ptr = 0; | |
761 | } | |
762 | } | |
d58214b0 | 763 | EXPORT_SYMBOL(comedi_buf_memcpy_from); |
ed9eccbe | 764 | |
d163679c | 765 | unsigned int comedi_buf_read_n_available(struct comedi_async *async) |
ed9eccbe DS |
766 | { |
767 | unsigned num_bytes; | |
768 | ||
769 | if (async == NULL) | |
770 | return 0; | |
771 | num_bytes = async->munge_count - async->buf_read_count; | |
772 | /* barrier insures the read of munge_count in this | |
773 | query occurs before any following reads of the buffer which | |
774 | might be based on the return value from this query. | |
775 | */ | |
776 | smp_rmb(); | |
777 | return num_bytes; | |
778 | } | |
d58214b0 | 779 | EXPORT_SYMBOL(comedi_buf_read_n_available); |
ed9eccbe | 780 | |
d163679c | 781 | int comedi_buf_get(struct comedi_async *async, short *x) |
ed9eccbe DS |
782 | { |
783 | unsigned int n = comedi_buf_read_n_available(async); | |
784 | ||
790c5541 | 785 | if (n < sizeof(short)) |
ed9eccbe | 786 | return 0; |
790c5541 | 787 | comedi_buf_read_alloc(async, sizeof(short)); |
0a85b6f0 | 788 | *x = *(short *)(async->prealloc_buf + async->buf_read_ptr); |
790c5541 | 789 | comedi_buf_read_free(async, sizeof(short)); |
ed9eccbe DS |
790 | return 1; |
791 | } | |
d58214b0 | 792 | EXPORT_SYMBOL(comedi_buf_get); |
ed9eccbe | 793 | |
d163679c | 794 | int comedi_buf_put(struct comedi_async *async, short x) |
ed9eccbe | 795 | { |
790c5541 | 796 | unsigned int n = comedi_buf_write_alloc_strict(async, sizeof(short)); |
ed9eccbe | 797 | |
790c5541 | 798 | if (n < sizeof(short)) { |
ed9eccbe DS |
799 | async->events |= COMEDI_CB_ERROR; |
800 | return 0; | |
801 | } | |
0a85b6f0 | 802 | *(short *)(async->prealloc_buf + async->buf_write_ptr) = x; |
790c5541 | 803 | comedi_buf_write_free(async, sizeof(short)); |
ed9eccbe DS |
804 | return 1; |
805 | } | |
d58214b0 | 806 | EXPORT_SYMBOL(comedi_buf_put); |
ed9eccbe | 807 | |
d163679c | 808 | void comedi_reset_async_buf(struct comedi_async *async) |
ed9eccbe DS |
809 | { |
810 | async->buf_write_alloc_count = 0; | |
811 | async->buf_write_count = 0; | |
812 | async->buf_read_alloc_count = 0; | |
813 | async->buf_read_count = 0; | |
814 | ||
815 | async->buf_write_ptr = 0; | |
816 | async->buf_read_ptr = 0; | |
817 | ||
818 | async->cur_chan = 0; | |
819 | async->scan_progress = 0; | |
820 | async->munge_chan = 0; | |
821 | async->munge_count = 0; | |
822 | async->munge_ptr = 0; | |
823 | ||
824 | async->events = 0; | |
825 | } | |
826 | ||
f4011670 IA |
827 | static int |
828 | comedi_auto_config_helper(struct device *hardware_device, | |
829 | struct comedi_driver *driver, | |
830 | int (*attach_wrapper) (struct comedi_device *, | |
831 | void *), void *context) | |
832 | { | |
833 | int minor; | |
834 | struct comedi_device_file_info *dev_file_info; | |
835 | struct comedi_device *comedi_dev; | |
836 | int ret; | |
837 | ||
838 | if (!comedi_autoconfig) | |
839 | return 0; | |
840 | ||
841 | minor = comedi_alloc_board_minor(hardware_device); | |
842 | if (minor < 0) | |
843 | return minor; | |
844 | ||
845 | dev_file_info = comedi_get_device_file_info(minor); | |
846 | comedi_dev = dev_file_info->device; | |
847 | ||
848 | mutex_lock(&comedi_dev->mutex); | |
849 | if (comedi_dev->attached) | |
850 | ret = -EBUSY; | |
851 | else if (!try_module_get(driver->module)) { | |
852 | printk(KERN_INFO "comedi: failed to increment module count\n"); | |
853 | ret = -EIO; | |
854 | } else { | |
855 | /* set comedi_dev->driver here for attach wrapper */ | |
856 | comedi_dev->driver = driver; | |
857 | ret = (*attach_wrapper)(comedi_dev, context); | |
858 | if (ret < 0) { | |
859 | module_put(driver->module); | |
860 | __comedi_device_detach(comedi_dev); | |
861 | } else { | |
862 | ret = comedi_device_postconfig(comedi_dev); | |
863 | } | |
864 | } | |
865 | mutex_unlock(&comedi_dev->mutex); | |
866 | ||
867 | if (ret < 0) | |
868 | comedi_free_board_minor(minor); | |
869 | return ret; | |
870 | } | |
871 | ||
cf938c24 IA |
872 | static int comedi_auto_config_wrapper(struct comedi_device *dev, void *context) |
873 | { | |
874 | struct comedi_devconfig *it = context; | |
875 | struct comedi_driver *driv = dev->driver; | |
876 | ||
877 | if (driv->num_names) { | |
878 | /* look for generic board entry matching driver name, which | |
879 | * has already been copied to it->board_name */ | |
880 | dev->board_ptr = comedi_recognize(driv, it->board_name); | |
881 | if (dev->board_ptr == NULL) { | |
882 | printk(KERN_WARNING | |
883 | "comedi: auto config failed to find board entry" | |
884 | " '%s' for driver '%s'\n", it->board_name, | |
885 | driv->driver_name); | |
886 | comedi_report_boards(driv); | |
887 | return -EINVAL; | |
888 | } | |
889 | } | |
890 | return driv->attach(dev, it); | |
891 | } | |
892 | ||
7029a874 | 893 | static int comedi_auto_config(struct device *hardware_device, |
63bf3d11 | 894 | struct comedi_driver *driver, const int *options, |
7029a874 | 895 | unsigned num_options) |
ed9eccbe | 896 | { |
0707bb04 | 897 | struct comedi_devconfig it; |
ed9eccbe DS |
898 | |
899 | memset(&it, 0, sizeof(it)); | |
63bf3d11 | 900 | strncpy(it.board_name, driver->driver_name, COMEDI_NAMELEN); |
ed9eccbe DS |
901 | it.board_name[COMEDI_NAMELEN - 1] = '\0'; |
902 | BUG_ON(num_options > COMEDI_NDEVCONFOPTS); | |
903 | memcpy(it.options, options, num_options * sizeof(int)); | |
cf938c24 IA |
904 | return comedi_auto_config_helper(hardware_device, driver, |
905 | comedi_auto_config_wrapper, &it); | |
ed9eccbe DS |
906 | } |
907 | ||
7029a874 | 908 | static void comedi_auto_unconfig(struct device *hardware_device) |
ed9eccbe | 909 | { |
c43435d7 | 910 | int minor; |
ed9eccbe | 911 | |
c43435d7 IA |
912 | if (hardware_device == NULL) |
913 | return; | |
914 | minor = comedi_find_board_minor(hardware_device); | |
915 | if (minor < 0) | |
916 | return; | |
917 | BUG_ON(minor >= COMEDI_NUM_BOARD_MINORS); | |
918 | comedi_free_board_minor(minor); | |
ed9eccbe DS |
919 | } |
920 | ||
55c03cff HS |
921 | /** |
922 | * comedi_pci_enable() - Enable the PCI device and request the regions. | |
923 | * @pdev: pci_dev struct | |
924 | * @res_name: name for the requested reqource | |
925 | */ | |
926 | int comedi_pci_enable(struct pci_dev *pdev, const char *res_name) | |
927 | { | |
928 | int rc; | |
929 | ||
930 | rc = pci_enable_device(pdev); | |
931 | if (rc < 0) | |
932 | return rc; | |
933 | ||
934 | rc = pci_request_regions(pdev, res_name); | |
935 | if (rc < 0) | |
936 | pci_disable_device(pdev); | |
937 | ||
938 | return rc; | |
939 | } | |
940 | EXPORT_SYMBOL_GPL(comedi_pci_enable); | |
941 | ||
942 | /** | |
943 | * comedi_pci_disable() - Release the regions and disable the PCI device. | |
944 | * @pdev: pci_dev struct | |
945 | * | |
946 | * This must be matched with a previous successful call to comedi_pci_enable(). | |
947 | */ | |
948 | void comedi_pci_disable(struct pci_dev *pdev) | |
949 | { | |
950 | pci_release_regions(pdev); | |
951 | pci_disable_device(pdev); | |
952 | } | |
953 | EXPORT_SYMBOL_GPL(comedi_pci_disable); | |
954 | ||
f4011670 IA |
955 | static int comedi_old_pci_auto_config(struct pci_dev *pcidev, |
956 | struct comedi_driver *driver) | |
ed9eccbe DS |
957 | { |
958 | int options[2]; | |
959 | ||
b6c77757 | 960 | /* pci bus */ |
ed9eccbe | 961 | options[0] = pcidev->bus->number; |
b6c77757 | 962 | /* pci slot */ |
ed9eccbe DS |
963 | options[1] = PCI_SLOT(pcidev->devfn); |
964 | ||
63bf3d11 | 965 | return comedi_auto_config(&pcidev->dev, driver, |
8629efa4 | 966 | options, ARRAY_SIZE(options)); |
ed9eccbe | 967 | } |
f4011670 IA |
968 | |
969 | static int comedi_pci_attach_wrapper(struct comedi_device *dev, void *pcidev) | |
970 | { | |
971 | return dev->driver->attach_pci(dev, pcidev); | |
972 | } | |
973 | ||
974 | static int comedi_new_pci_auto_config(struct pci_dev *pcidev, | |
975 | struct comedi_driver *driver) | |
976 | { | |
977 | return comedi_auto_config_helper(&pcidev->dev, driver, | |
978 | comedi_pci_attach_wrapper, pcidev); | |
979 | } | |
980 | ||
981 | int comedi_pci_auto_config(struct pci_dev *pcidev, struct comedi_driver *driver) | |
982 | { | |
983 | ||
984 | if (driver->attach_pci) | |
985 | return comedi_new_pci_auto_config(pcidev, driver); | |
986 | else | |
987 | return comedi_old_pci_auto_config(pcidev, driver); | |
988 | } | |
4bf93559 | 989 | EXPORT_SYMBOL_GPL(comedi_pci_auto_config); |
ed9eccbe DS |
990 | |
991 | void comedi_pci_auto_unconfig(struct pci_dev *pcidev) | |
992 | { | |
993 | comedi_auto_unconfig(&pcidev->dev); | |
994 | } | |
4bf93559 | 995 | EXPORT_SYMBOL_GPL(comedi_pci_auto_unconfig); |
c28264da | 996 | |
d4899c6f HS |
997 | int comedi_pci_driver_register(struct comedi_driver *comedi_driver, |
998 | struct pci_driver *pci_driver) | |
999 | { | |
1000 | int ret; | |
1001 | ||
1002 | ret = comedi_driver_register(comedi_driver); | |
1003 | if (ret < 0) | |
1004 | return ret; | |
1005 | ||
1006 | /* FIXME: Remove this test after auditing all comedi pci drivers */ | |
1007 | if (!pci_driver->name) | |
1008 | pci_driver->name = comedi_driver->driver_name; | |
1009 | ||
1010 | ret = pci_register_driver(pci_driver); | |
1011 | if (ret < 0) { | |
1012 | comedi_driver_unregister(comedi_driver); | |
1013 | return ret; | |
1014 | } | |
1015 | ||
1016 | return 0; | |
1017 | } | |
1018 | EXPORT_SYMBOL_GPL(comedi_pci_driver_register); | |
1019 | ||
1020 | void comedi_pci_driver_unregister(struct comedi_driver *comedi_driver, | |
1021 | struct pci_driver *pci_driver) | |
1022 | { | |
1023 | pci_unregister_driver(pci_driver); | |
1024 | comedi_driver_unregister(comedi_driver); | |
1025 | } | |
1026 | EXPORT_SYMBOL_GPL(comedi_pci_driver_unregister); | |
1027 | ||
f4011670 IA |
1028 | static int comedi_old_usb_auto_config(struct usb_interface *intf, |
1029 | struct comedi_driver *driver) | |
1030 | { | |
63bf3d11 | 1031 | return comedi_auto_config(&intf->dev, driver, NULL, 0); |
f4011670 IA |
1032 | } |
1033 | ||
1034 | static int comedi_usb_attach_wrapper(struct comedi_device *dev, void *intf) | |
1035 | { | |
1036 | return dev->driver->attach_usb(dev, intf); | |
1037 | } | |
1038 | ||
1039 | static int comedi_new_usb_auto_config(struct usb_interface *intf, | |
1040 | struct comedi_driver *driver) | |
1041 | { | |
1042 | return comedi_auto_config_helper(&intf->dev, driver, | |
1043 | comedi_usb_attach_wrapper, intf); | |
1044 | } | |
1045 | ||
d8b6ca08 | 1046 | int comedi_usb_auto_config(struct usb_interface *intf, |
4c093a6d | 1047 | struct comedi_driver *driver) |
c28264da | 1048 | { |
d8b6ca08 | 1049 | BUG_ON(intf == NULL); |
f4011670 IA |
1050 | if (driver->attach_usb) |
1051 | return comedi_new_usb_auto_config(intf, driver); | |
1052 | else | |
1053 | return comedi_old_usb_auto_config(intf, driver); | |
c28264da | 1054 | } |
4bf93559 | 1055 | EXPORT_SYMBOL_GPL(comedi_usb_auto_config); |
c28264da | 1056 | |
d8b6ca08 | 1057 | void comedi_usb_auto_unconfig(struct usb_interface *intf) |
c28264da | 1058 | { |
d8b6ca08 IA |
1059 | BUG_ON(intf == NULL); |
1060 | comedi_auto_unconfig(&intf->dev); | |
c28264da | 1061 | } |
4bf93559 | 1062 | EXPORT_SYMBOL_GPL(comedi_usb_auto_unconfig); |
64255031 HS |
1063 | |
1064 | int comedi_usb_driver_register(struct comedi_driver *comedi_driver, | |
1065 | struct usb_driver *usb_driver) | |
1066 | { | |
1067 | int ret; | |
1068 | ||
1069 | ret = comedi_driver_register(comedi_driver); | |
1070 | if (ret < 0) | |
1071 | return ret; | |
1072 | ||
1073 | ret = usb_register(usb_driver); | |
1074 | if (ret < 0) { | |
1075 | comedi_driver_unregister(comedi_driver); | |
1076 | return ret; | |
1077 | } | |
1078 | ||
1079 | return 0; | |
1080 | } | |
1081 | EXPORT_SYMBOL_GPL(comedi_usb_driver_register); | |
1082 | ||
1083 | void comedi_usb_driver_unregister(struct comedi_driver *comedi_driver, | |
1084 | struct usb_driver *usb_driver) | |
1085 | { | |
1086 | usb_deregister(usb_driver); | |
1087 | comedi_driver_unregister(comedi_driver); | |
1088 | } | |
1089 | EXPORT_SYMBOL_GPL(comedi_usb_driver_unregister); |