Commit | Line | Data |
---|---|---|
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__ | |
ed9eccbe DS |
27 | #include <linux/device.h> |
28 | #include <linux/module.h> | |
29 | #include <linux/pci.h> | |
c28264da | 30 | #include <linux/usb.h> |
ed9eccbe | 31 | #include <linux/errno.h> |
78b10615 | 32 | #include <linux/kconfig.h> |
ed9eccbe DS |
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 | 46 | #include "comedidev.h" |
3a5fa275 | 47 | #include "comedi_internal.h" |
242e7ad9 | 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 | { |
03afcf47 | 61 | struct comedi_subdevice *s; |
8b9ba6e5 | 62 | int i; |
2f0b9d08 | 63 | |
7f801c41 HS |
64 | if (num_subdevices < 1) |
65 | return -EINVAL; | |
03afcf47 HS |
66 | |
67 | s = kcalloc(num_subdevices, sizeof(*s), GFP_KERNEL); | |
68 | if (!s) | |
2f0b9d08 | 69 | return -ENOMEM; |
03afcf47 | 70 | dev->subdevices = s; |
fba1d0fa | 71 | dev->n_subdevices = num_subdevices; |
03afcf47 | 72 | |
2f0b9d08 | 73 | for (i = 0; i < num_subdevices; ++i) { |
03afcf47 HS |
74 | s = dev->subdevices + i; |
75 | s->device = dev; | |
76 | s->async_dma_dir = DMA_NONE; | |
77 | spin_lock_init(&s->spin_lock); | |
78 | s->minor = -1; | |
2f0b9d08 HS |
79 | } |
80 | return 0; | |
81 | } | |
82 | EXPORT_SYMBOL_GPL(comedi_alloc_subdevices); | |
83 | ||
71b5f4f1 | 84 | static void cleanup_device(struct comedi_device *dev) |
ed9eccbe DS |
85 | { |
86 | int i; | |
34c43922 | 87 | struct comedi_subdevice *s; |
ed9eccbe DS |
88 | |
89 | if (dev->subdevices) { | |
90 | for (i = 0; i < dev->n_subdevices; i++) { | |
91 | s = dev->subdevices + i; | |
92 | comedi_free_subdevice_minor(s); | |
93 | if (s->async) { | |
94 | comedi_buf_alloc(dev, s, 0); | |
95 | kfree(s->async); | |
96 | } | |
97 | } | |
98 | kfree(dev->subdevices); | |
99 | dev->subdevices = NULL; | |
100 | dev->n_subdevices = 0; | |
101 | } | |
dedd1325 BP |
102 | kfree(dev->private); |
103 | dev->private = NULL; | |
7029a874 | 104 | dev->driver = NULL; |
ed9eccbe DS |
105 | dev->board_name = NULL; |
106 | dev->board_ptr = NULL; | |
107 | dev->iobase = 0; | |
108 | dev->irq = 0; | |
109 | dev->read_subdev = NULL; | |
110 | dev->write_subdev = NULL; | |
111 | dev->open = NULL; | |
112 | dev->close = NULL; | |
113 | comedi_set_hw_dev(dev, NULL); | |
114 | } | |
115 | ||
71b5f4f1 | 116 | static void __comedi_device_detach(struct comedi_device *dev) |
ed9eccbe DS |
117 | { |
118 | dev->attached = 0; | |
5617f9da | 119 | if (dev->driver) |
ed9eccbe | 120 | dev->driver->detach(dev); |
5617f9da | 121 | else |
4f870fe6 IA |
122 | dev_warn(dev->class_dev, |
123 | "BUG: dev->driver=NULL in comedi_device_detach()\n"); | |
ed9eccbe DS |
124 | cleanup_device(dev); |
125 | } | |
126 | ||
71b5f4f1 | 127 | void comedi_device_detach(struct comedi_device *dev) |
ed9eccbe DS |
128 | { |
129 | if (!dev->attached) | |
130 | return; | |
131 | __comedi_device_detach(dev); | |
132 | } | |
133 | ||
3902a370 IA |
134 | /* do a little post-config cleanup */ |
135 | /* called with module refcount incremented, decrements it */ | |
136 | static int comedi_device_postconfig(struct comedi_device *dev) | |
137 | { | |
138 | int ret = postconfig(dev); | |
139 | module_put(dev->driver->module); | |
140 | if (ret < 0) { | |
141 | __comedi_device_detach(dev); | |
142 | return ret; | |
143 | } | |
144 | if (!dev->board_name) { | |
4f870fe6 | 145 | dev_warn(dev->class_dev, "BUG: dev->board_name=NULL\n"); |
3902a370 IA |
146 | dev->board_name = "BUG"; |
147 | } | |
148 | smp_wmb(); | |
149 | dev->attached = 1; | |
150 | return 0; | |
151 | } | |
152 | ||
0707bb04 | 153 | int comedi_device_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
ed9eccbe | 154 | { |
139dfbdf | 155 | struct comedi_driver *driv; |
ed9eccbe DS |
156 | int ret; |
157 | ||
158 | if (dev->attached) | |
159 | return -EBUSY; | |
160 | ||
161 | for (driv = comedi_drivers; driv; driv = driv->next) { | |
162 | if (!try_module_get(driv->module)) { | |
ed9eccbe DS |
163 | continue; |
164 | } | |
165 | if (driv->num_names) { | |
166 | dev->board_ptr = comedi_recognize(driv, it->board_name); | |
3902a370 IA |
167 | if (dev->board_ptr) |
168 | break; | |
80eb7a50 | 169 | } else if (strcmp(driv->driver_name, it->board_name) == 0) |
3902a370 IA |
170 | break; |
171 | module_put(driv->module); | |
172 | } | |
173 | if (driv == NULL) { | |
174 | /* recognize has failed if we get here */ | |
175 | /* report valid board names before returning error */ | |
176 | for (driv = comedi_drivers; driv; driv = driv->next) { | |
177 | if (!try_module_get(driv->module)) { | |
ed9eccbe DS |
178 | continue; |
179 | } | |
3902a370 IA |
180 | comedi_report_boards(driv); |
181 | module_put(driv->module); | |
ed9eccbe | 182 | } |
3902a370 | 183 | return -EIO; |
ed9eccbe | 184 | } |
8c3714d6 IA |
185 | if (driv->attach == NULL) { |
186 | /* driver does not support manual configuration */ | |
187 | dev_warn(dev->class_dev, | |
188 | "driver '%s' does not support attach using comedi_config\n", | |
189 | driv->driver_name); | |
190 | module_put(driv->module); | |
191 | return -ENOSYS; | |
192 | } | |
3902a370 IA |
193 | /* initialize dev->driver here so |
194 | * comedi_error() can be called from attach */ | |
195 | dev->driver = driv; | |
196 | ret = driv->attach(dev, it); | |
ed9eccbe | 197 | if (ret < 0) { |
3902a370 | 198 | module_put(dev->driver->module); |
ed9eccbe DS |
199 | __comedi_device_detach(dev); |
200 | return ret; | |
201 | } | |
3902a370 | 202 | return comedi_device_postconfig(dev); |
ed9eccbe DS |
203 | } |
204 | ||
139dfbdf | 205 | int comedi_driver_register(struct comedi_driver *driver) |
ed9eccbe DS |
206 | { |
207 | driver->next = comedi_drivers; | |
208 | comedi_drivers = driver; | |
209 | ||
210 | return 0; | |
211 | } | |
d58214b0 | 212 | EXPORT_SYMBOL(comedi_driver_register); |
ed9eccbe | 213 | |
139dfbdf | 214 | int comedi_driver_unregister(struct comedi_driver *driver) |
ed9eccbe | 215 | { |
139dfbdf | 216 | struct comedi_driver *prev; |
ed9eccbe DS |
217 | int i; |
218 | ||
219 | /* check for devices using this driver */ | |
220 | for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) { | |
0a85b6f0 MT |
221 | struct comedi_device_file_info *dev_file_info = |
222 | comedi_get_device_file_info(i); | |
71b5f4f1 | 223 | struct comedi_device *dev; |
ed9eccbe | 224 | |
0a85b6f0 MT |
225 | if (dev_file_info == NULL) |
226 | continue; | |
ed9eccbe DS |
227 | dev = dev_file_info->device; |
228 | ||
229 | mutex_lock(&dev->mutex); | |
230 | if (dev->attached && dev->driver == driver) { | |
231 | if (dev->use_count) | |
4f870fe6 IA |
232 | dev_warn(dev->class_dev, |
233 | "BUG! detaching device with use_count=%d\n", | |
234 | dev->use_count); | |
ed9eccbe DS |
235 | comedi_device_detach(dev); |
236 | } | |
237 | mutex_unlock(&dev->mutex); | |
238 | } | |
239 | ||
240 | if (comedi_drivers == driver) { | |
241 | comedi_drivers = driver->next; | |
242 | return 0; | |
243 | } | |
244 | ||
245 | for (prev = comedi_drivers; prev->next; prev = prev->next) { | |
246 | if (prev->next == driver) { | |
247 | prev->next = driver->next; | |
248 | return 0; | |
249 | } | |
250 | } | |
251 | return -EINVAL; | |
252 | } | |
d58214b0 | 253 | EXPORT_SYMBOL(comedi_driver_unregister); |
ed9eccbe | 254 | |
71b5f4f1 | 255 | static int postconfig(struct comedi_device *dev) |
ed9eccbe DS |
256 | { |
257 | int i; | |
34c43922 | 258 | struct comedi_subdevice *s; |
d163679c | 259 | struct comedi_async *async = NULL; |
ed9eccbe DS |
260 | int ret; |
261 | ||
262 | for (i = 0; i < dev->n_subdevices; i++) { | |
263 | s = dev->subdevices + i; | |
264 | ||
265 | if (s->type == COMEDI_SUBD_UNUSED) | |
266 | continue; | |
267 | ||
268 | if (s->len_chanlist == 0) | |
269 | s->len_chanlist = 1; | |
270 | ||
271 | if (s->do_cmd) { | |
4d7df821 IA |
272 | unsigned int buf_size; |
273 | ||
ed9eccbe | 274 | BUG_ON((s->subdev_flags & (SDF_CMD_READ | |
0a85b6f0 | 275 | SDF_CMD_WRITE)) == 0); |
ed9eccbe DS |
276 | BUG_ON(!s->do_cmdtest); |
277 | ||
0a85b6f0 MT |
278 | async = |
279 | kzalloc(sizeof(struct comedi_async), GFP_KERNEL); | |
ed9eccbe | 280 | if (async == NULL) { |
4f870fe6 IA |
281 | dev_warn(dev->class_dev, |
282 | "failed to allocate async struct\n"); | |
ed9eccbe DS |
283 | return -ENOMEM; |
284 | } | |
285 | init_waitqueue_head(&async->wait_head); | |
286 | async->subdevice = s; | |
287 | s->async = async; | |
288 | ||
4d7df821 IA |
289 | async->max_bufsize = |
290 | comedi_default_buf_maxsize_kb * 1024; | |
291 | buf_size = comedi_default_buf_size_kb * 1024; | |
292 | if (buf_size > async->max_bufsize) | |
293 | buf_size = async->max_bufsize; | |
ed9eccbe DS |
294 | |
295 | async->prealloc_buf = NULL; | |
296 | async->prealloc_bufsz = 0; | |
4d7df821 | 297 | if (comedi_buf_alloc(dev, s, buf_size) < 0) { |
4f870fe6 IA |
298 | dev_warn(dev->class_dev, |
299 | "Buffer allocation failed\n"); | |
ed9eccbe DS |
300 | return -ENOMEM; |
301 | } | |
302 | if (s->buf_change) { | |
4d7df821 | 303 | ret = s->buf_change(dev, s, buf_size); |
ed9eccbe DS |
304 | if (ret < 0) |
305 | return ret; | |
306 | } | |
307 | comedi_alloc_subdevice_minor(dev, s); | |
308 | } | |
309 | ||
310 | if (!s->range_table && !s->range_table_list) | |
311 | s->range_table = &range_unknown; | |
312 | ||
313 | if (!s->insn_read && s->insn_bits) | |
314 | s->insn_read = insn_rw_emulate_bits; | |
315 | if (!s->insn_write && s->insn_bits) | |
316 | s->insn_write = insn_rw_emulate_bits; | |
317 | ||
318 | if (!s->insn_read) | |
319 | s->insn_read = insn_inval; | |
320 | if (!s->insn_write) | |
321 | s->insn_write = insn_inval; | |
322 | if (!s->insn_bits) | |
323 | s->insn_bits = insn_inval; | |
324 | if (!s->insn_config) | |
325 | s->insn_config = insn_inval; | |
326 | ||
327 | if (!s->poll) | |
328 | s->poll = poll_invalid; | |
329 | } | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
4e2f002f IA |
334 | /* |
335 | * Generic recognize function for drivers that register their supported | |
336 | * board names. | |
337 | * | |
338 | * 'driv->board_name' points to a 'const char *' member within the | |
339 | * zeroth element of an array of some private board information | |
340 | * structure, say 'struct foo_board' containing a member 'const char | |
341 | * *board_name' that is initialized to point to a board name string that | |
342 | * is one of the candidates matched against this function's 'name' | |
343 | * parameter. | |
344 | * | |
345 | * 'driv->offset' is the size of the private board information | |
346 | * structure, say 'sizeof(struct foo_board)', and 'driv->num_names' is | |
347 | * the length of the array of private board information structures. | |
348 | * | |
349 | * If one of the board names in the array of private board information | |
350 | * structures matches the name supplied to this function, the function | |
351 | * returns a pointer to the pointer to the board name, otherwise it | |
352 | * returns NULL. The return value ends up in the 'board_ptr' member of | |
353 | * a 'struct comedi_device' that the low-level comedi driver's | |
354 | * 'attach()' hook can convert to a point to a particular element of its | |
355 | * array of private board information structures by subtracting the | |
356 | * offset of the member that points to the board name. (No subtraction | |
357 | * is required if the board name pointer is the first member of the | |
358 | * private board information structure, which is generally the case.) | |
359 | */ | |
7029a874 | 360 | static void *comedi_recognize(struct comedi_driver *driv, const char *name) |
ed9eccbe | 361 | { |
1c9de58a DC |
362 | char **name_ptr = (char **)driv->board_name; |
363 | int i; | |
364 | ||
ed9eccbe DS |
365 | for (i = 0; i < driv->num_names; i++) { |
366 | if (strcmp(*name_ptr, name) == 0) | |
1c9de58a DC |
367 | return name_ptr; |
368 | name_ptr = (void *)name_ptr + driv->offset; | |
ed9eccbe DS |
369 | } |
370 | ||
371 | return NULL; | |
372 | } | |
373 | ||
7029a874 | 374 | static void comedi_report_boards(struct comedi_driver *driv) |
ed9eccbe DS |
375 | { |
376 | unsigned int i; | |
377 | const char *const *name_ptr; | |
378 | ||
4f870fe6 IA |
379 | pr_info("comedi: valid board names for %s driver are:\n", |
380 | driv->driver_name); | |
ed9eccbe DS |
381 | |
382 | name_ptr = driv->board_name; | |
383 | for (i = 0; i < driv->num_names; i++) { | |
4f870fe6 | 384 | pr_info(" %s\n", *name_ptr); |
ed9eccbe DS |
385 | name_ptr = (const char **)((char *)name_ptr + driv->offset); |
386 | } | |
387 | ||
388 | if (driv->num_names == 0) | |
4f870fe6 | 389 | pr_info(" %s\n", driv->driver_name); |
ed9eccbe DS |
390 | } |
391 | ||
34c43922 | 392 | static int poll_invalid(struct comedi_device *dev, struct comedi_subdevice *s) |
ed9eccbe DS |
393 | { |
394 | return -EINVAL; | |
395 | } | |
396 | ||
34c43922 | 397 | int insn_inval(struct comedi_device *dev, struct comedi_subdevice *s, |
0a85b6f0 | 398 | struct comedi_insn *insn, unsigned int *data) |
ed9eccbe DS |
399 | { |
400 | return -EINVAL; | |
401 | } | |
402 | ||
0a85b6f0 MT |
403 | static int insn_rw_emulate_bits(struct comedi_device *dev, |
404 | struct comedi_subdevice *s, | |
405 | struct comedi_insn *insn, unsigned int *data) | |
ed9eccbe | 406 | { |
90035c08 | 407 | struct comedi_insn new_insn; |
ed9eccbe DS |
408 | int ret; |
409 | static const unsigned channels_per_bitfield = 32; | |
410 | ||
411 | unsigned chan = CR_CHAN(insn->chanspec); | |
412 | const unsigned base_bitfield_channel = | |
0a85b6f0 | 413 | (chan < channels_per_bitfield) ? 0 : chan; |
790c5541 | 414 | unsigned int new_data[2]; |
ed9eccbe DS |
415 | memset(new_data, 0, sizeof(new_data)); |
416 | memset(&new_insn, 0, sizeof(new_insn)); | |
417 | new_insn.insn = INSN_BITS; | |
418 | new_insn.chanspec = base_bitfield_channel; | |
419 | new_insn.n = 2; | |
420 | new_insn.data = new_data; | |
421 | new_insn.subdev = insn->subdev; | |
422 | ||
423 | if (insn->insn == INSN_WRITE) { | |
424 | if (!(s->subdev_flags & SDF_WRITABLE)) | |
425 | return -EINVAL; | |
aad4029a MR |
426 | new_data[0] = 1 << (chan - base_bitfield_channel); /* mask */ |
427 | new_data[1] = data[0] ? (1 << (chan - base_bitfield_channel)) | |
428 | : 0; /* bits */ | |
ed9eccbe DS |
429 | } |
430 | ||
431 | ret = s->insn_bits(dev, s, &new_insn, new_data); | |
432 | if (ret < 0) | |
433 | return ret; | |
434 | ||
5617f9da | 435 | if (insn->insn == INSN_READ) |
ed9eccbe | 436 | data[0] = (new_data[1] >> (chan - base_bitfield_channel)) & 1; |
ed9eccbe DS |
437 | |
438 | return 1; | |
439 | } | |
440 | ||
34c43922 | 441 | int comedi_buf_alloc(struct comedi_device *dev, struct comedi_subdevice *s, |
0a85b6f0 | 442 | unsigned long new_size) |
ed9eccbe | 443 | { |
d163679c | 444 | struct comedi_async *async = s->async; |
ed9eccbe DS |
445 | |
446 | /* Round up new_size to multiple of PAGE_SIZE */ | |
447 | new_size = (new_size + PAGE_SIZE - 1) & PAGE_MASK; | |
448 | ||
449 | /* if no change is required, do nothing */ | |
5617f9da | 450 | if (async->prealloc_buf && async->prealloc_bufsz == new_size) |
ed9eccbe | 451 | return 0; |
5617f9da | 452 | |
b6c77757 | 453 | /* deallocate old buffer */ |
ed9eccbe DS |
454 | if (async->prealloc_buf) { |
455 | vunmap(async->prealloc_buf); | |
456 | async->prealloc_buf = NULL; | |
457 | async->prealloc_bufsz = 0; | |
458 | } | |
459 | if (async->buf_page_list) { | |
460 | unsigned i; | |
461 | for (i = 0; i < async->n_buf_pages; ++i) { | |
462 | if (async->buf_page_list[i].virt_addr) { | |
88ab8a84 XF |
463 | clear_bit(PG_reserved, |
464 | &(virt_to_page(async->buf_page_list[i]. | |
465 | virt_addr)->flags)); | |
ed9eccbe DS |
466 | if (s->async_dma_dir != DMA_NONE) { |
467 | dma_free_coherent(dev->hw_dev, | |
0a85b6f0 MT |
468 | PAGE_SIZE, |
469 | async-> | |
470 | buf_page_list | |
471 | [i].virt_addr, | |
472 | async-> | |
473 | buf_page_list | |
474 | [i].dma_addr); | |
ed9eccbe | 475 | } else { |
0a85b6f0 MT |
476 | free_page((unsigned long) |
477 | async->buf_page_list[i]. | |
478 | virt_addr); | |
ed9eccbe DS |
479 | } |
480 | } | |
481 | } | |
482 | vfree(async->buf_page_list); | |
483 | async->buf_page_list = NULL; | |
484 | async->n_buf_pages = 0; | |
485 | } | |
b6c77757 | 486 | /* allocate new buffer */ |
ed9eccbe DS |
487 | if (new_size) { |
488 | unsigned i = 0; | |
489 | unsigned n_pages = new_size >> PAGE_SHIFT; | |
490 | struct page **pages = NULL; | |
491 | ||
492 | async->buf_page_list = | |
5b84cc78 | 493 | vzalloc(sizeof(struct comedi_buf_page) * n_pages); |
3ad4e219 | 494 | if (async->buf_page_list) |
ed9eccbe | 495 | pages = vmalloc(sizeof(struct page *) * n_pages); |
3ad4e219 | 496 | |
ed9eccbe DS |
497 | if (pages) { |
498 | for (i = 0; i < n_pages; i++) { | |
499 | if (s->async_dma_dir != DMA_NONE) { | |
500 | async->buf_page_list[i].virt_addr = | |
0a85b6f0 MT |
501 | dma_alloc_coherent(dev->hw_dev, |
502 | PAGE_SIZE, | |
503 | &async-> | |
504 | buf_page_list | |
505 | [i].dma_addr, | |
506 | GFP_KERNEL | | |
507 | __GFP_COMP); | |
ed9eccbe DS |
508 | } else { |
509 | async->buf_page_list[i].virt_addr = | |
0a85b6f0 MT |
510 | (void *) |
511 | get_zeroed_page(GFP_KERNEL); | |
ed9eccbe | 512 | } |
5617f9da | 513 | if (async->buf_page_list[i].virt_addr == NULL) |
ed9eccbe | 514 | break; |
5617f9da | 515 | |
be29eac8 | 516 | set_bit(PG_reserved, |
88ab8a84 XF |
517 | &(virt_to_page(async->buf_page_list[i]. |
518 | virt_addr)->flags)); | |
519 | pages[i] = virt_to_page(async->buf_page_list[i]. | |
520 | virt_addr); | |
ed9eccbe DS |
521 | } |
522 | } | |
523 | if (i == n_pages) { | |
524 | async->prealloc_buf = | |
408093d2 | 525 | #ifdef PAGE_KERNEL_NOCACHE |
0a85b6f0 | 526 | vmap(pages, n_pages, VM_MAP, PAGE_KERNEL_NOCACHE); |
408093d2 GKH |
527 | #else |
528 | vmap(pages, n_pages, VM_MAP, PAGE_KERNEL); | |
529 | #endif | |
ed9eccbe | 530 | } |
b455073c F |
531 | vfree(pages); |
532 | ||
ed9eccbe DS |
533 | if (async->prealloc_buf == NULL) { |
534 | /* Some allocation failed above. */ | |
535 | if (async->buf_page_list) { | |
536 | for (i = 0; i < n_pages; i++) { | |
537 | if (async->buf_page_list[i].virt_addr == | |
0a85b6f0 | 538 | NULL) { |
ed9eccbe DS |
539 | break; |
540 | } | |
88ab8a84 XF |
541 | clear_bit(PG_reserved, |
542 | &(virt_to_page(async-> | |
543 | buf_page_list[i]. | |
544 | virt_addr)->flags)); | |
ed9eccbe DS |
545 | if (s->async_dma_dir != DMA_NONE) { |
546 | dma_free_coherent(dev->hw_dev, | |
0a85b6f0 MT |
547 | PAGE_SIZE, |
548 | async-> | |
549 | buf_page_list | |
550 | [i].virt_addr, | |
551 | async-> | |
552 | buf_page_list | |
553 | [i].dma_addr); | |
ed9eccbe | 554 | } else { |
0a85b6f0 MT |
555 | free_page((unsigned long) |
556 | async->buf_page_list | |
557 | [i].virt_addr); | |
ed9eccbe DS |
558 | } |
559 | } | |
560 | vfree(async->buf_page_list); | |
561 | async->buf_page_list = NULL; | |
562 | } | |
563 | return -ENOMEM; | |
564 | } | |
565 | async->n_buf_pages = n_pages; | |
566 | } | |
567 | async->prealloc_bufsz = new_size; | |
568 | ||
569 | return 0; | |
570 | } | |
571 | ||
572 | /* munging is applied to data by core as it passes between user | |
573 | * and kernel space */ | |
7029a874 GKH |
574 | static unsigned int comedi_buf_munge(struct comedi_async *async, |
575 | unsigned int num_bytes) | |
ed9eccbe | 576 | { |
34c43922 | 577 | struct comedi_subdevice *s = async->subdevice; |
ed9eccbe DS |
578 | unsigned int count = 0; |
579 | const unsigned num_sample_bytes = bytes_per_sample(s); | |
580 | ||
581 | if (s->munge == NULL || (async->cmd.flags & CMDF_RAWDATA)) { | |
582 | async->munge_count += num_bytes; | |
2961f24f | 583 | BUG_ON((int)(async->munge_count - async->buf_write_count) > 0); |
ed9eccbe DS |
584 | return num_bytes; |
585 | } | |
586 | /* don't munge partial samples */ | |
587 | num_bytes -= num_bytes % num_sample_bytes; | |
588 | while (count < num_bytes) { | |
589 | int block_size; | |
590 | ||
591 | block_size = num_bytes - count; | |
592 | if (block_size < 0) { | |
4f870fe6 IA |
593 | dev_warn(s->device->class_dev, |
594 | "%s: %s: bug! block_size is negative\n", | |
595 | __FILE__, __func__); | |
ed9eccbe DS |
596 | break; |
597 | } | |
598 | if ((int)(async->munge_ptr + block_size - | |
0a85b6f0 | 599 | async->prealloc_bufsz) > 0) |
ed9eccbe DS |
600 | block_size = async->prealloc_bufsz - async->munge_ptr; |
601 | ||
602 | s->munge(s->device, s, async->prealloc_buf + async->munge_ptr, | |
0a85b6f0 | 603 | block_size, async->munge_chan); |
ed9eccbe | 604 | |
ac4898a0 ZR |
605 | smp_wmb(); /* barrier insures data is munged in buffer |
606 | * before munge_count is incremented */ | |
ed9eccbe DS |
607 | |
608 | async->munge_chan += block_size / num_sample_bytes; | |
609 | async->munge_chan %= async->cmd.chanlist_len; | |
610 | async->munge_count += block_size; | |
611 | async->munge_ptr += block_size; | |
612 | async->munge_ptr %= async->prealloc_bufsz; | |
613 | count += block_size; | |
614 | } | |
2961f24f | 615 | BUG_ON((int)(async->munge_count - async->buf_write_count) > 0); |
ed9eccbe DS |
616 | return count; |
617 | } | |
618 | ||
d163679c | 619 | unsigned int comedi_buf_write_n_available(struct comedi_async *async) |
ed9eccbe DS |
620 | { |
621 | unsigned int free_end; | |
622 | unsigned int nbytes; | |
623 | ||
624 | if (async == NULL) | |
625 | return 0; | |
626 | ||
627 | free_end = async->buf_read_count + async->prealloc_bufsz; | |
628 | nbytes = free_end - async->buf_write_alloc_count; | |
629 | nbytes -= nbytes % bytes_per_sample(async->subdevice); | |
630 | /* barrier insures the read of buf_read_count in this | |
631 | query occurs before any following writes to the buffer which | |
632 | might be based on the return value from this query. | |
633 | */ | |
634 | smp_mb(); | |
635 | return nbytes; | |
636 | } | |
637 | ||
638 | /* allocates chunk for the writer from free buffer space */ | |
0a85b6f0 MT |
639 | unsigned int comedi_buf_write_alloc(struct comedi_async *async, |
640 | unsigned int nbytes) | |
ed9eccbe DS |
641 | { |
642 | unsigned int free_end = async->buf_read_count + async->prealloc_bufsz; | |
643 | ||
5617f9da | 644 | if ((int)(async->buf_write_alloc_count + nbytes - free_end) > 0) |
ed9eccbe | 645 | nbytes = free_end - async->buf_write_alloc_count; |
5617f9da | 646 | |
ed9eccbe DS |
647 | async->buf_write_alloc_count += nbytes; |
648 | /* barrier insures the read of buf_read_count above occurs before | |
649 | we write data to the write-alloc'ed buffer space */ | |
650 | smp_mb(); | |
651 | return nbytes; | |
652 | } | |
d58214b0 | 653 | EXPORT_SYMBOL(comedi_buf_write_alloc); |
ed9eccbe DS |
654 | |
655 | /* allocates nothing unless it can completely fulfill the request */ | |
d163679c | 656 | unsigned int comedi_buf_write_alloc_strict(struct comedi_async *async, |
0a85b6f0 | 657 | unsigned int nbytes) |
ed9eccbe DS |
658 | { |
659 | unsigned int free_end = async->buf_read_count + async->prealloc_bufsz; | |
660 | ||
5617f9da | 661 | if ((int)(async->buf_write_alloc_count + nbytes - free_end) > 0) |
ed9eccbe | 662 | nbytes = 0; |
5617f9da | 663 | |
ed9eccbe DS |
664 | async->buf_write_alloc_count += nbytes; |
665 | /* barrier insures the read of buf_read_count above occurs before | |
666 | we write data to the write-alloc'ed buffer space */ | |
667 | smp_mb(); | |
668 | return nbytes; | |
669 | } | |
670 | ||
671 | /* transfers a chunk from writer to filled buffer space */ | |
d163679c | 672 | unsigned comedi_buf_write_free(struct comedi_async *async, unsigned int nbytes) |
ed9eccbe DS |
673 | { |
674 | if ((int)(async->buf_write_count + nbytes - | |
0a85b6f0 | 675 | async->buf_write_alloc_count) > 0) { |
4f870fe6 IA |
676 | dev_info(async->subdevice->device->class_dev, |
677 | "attempted to write-free more bytes than have been write-allocated.\n"); | |
ed9eccbe DS |
678 | nbytes = async->buf_write_alloc_count - async->buf_write_count; |
679 | } | |
680 | async->buf_write_count += nbytes; | |
681 | async->buf_write_ptr += nbytes; | |
682 | comedi_buf_munge(async, async->buf_write_count - async->munge_count); | |
5617f9da | 683 | if (async->buf_write_ptr >= async->prealloc_bufsz) |
ed9eccbe | 684 | async->buf_write_ptr %= async->prealloc_bufsz; |
5617f9da | 685 | |
ed9eccbe DS |
686 | return nbytes; |
687 | } | |
d58214b0 | 688 | EXPORT_SYMBOL(comedi_buf_write_free); |
ed9eccbe DS |
689 | |
690 | /* allocates a chunk for the reader from filled (and munged) buffer space */ | |
d163679c | 691 | unsigned comedi_buf_read_alloc(struct comedi_async *async, unsigned nbytes) |
ed9eccbe DS |
692 | { |
693 | if ((int)(async->buf_read_alloc_count + nbytes - async->munge_count) > | |
0a85b6f0 | 694 | 0) { |
ed9eccbe DS |
695 | nbytes = async->munge_count - async->buf_read_alloc_count; |
696 | } | |
697 | async->buf_read_alloc_count += nbytes; | |
698 | /* barrier insures read of munge_count occurs before we actually read | |
699 | data out of buffer */ | |
700 | smp_rmb(); | |
701 | return nbytes; | |
702 | } | |
d58214b0 | 703 | EXPORT_SYMBOL(comedi_buf_read_alloc); |
ed9eccbe DS |
704 | |
705 | /* transfers control of a chunk from reader to free buffer space */ | |
d163679c | 706 | unsigned comedi_buf_read_free(struct comedi_async *async, unsigned int nbytes) |
ed9eccbe | 707 | { |
ac4898a0 ZR |
708 | /* barrier insures data has been read out of |
709 | * buffer before read count is incremented */ | |
ed9eccbe DS |
710 | smp_mb(); |
711 | if ((int)(async->buf_read_count + nbytes - | |
0a85b6f0 | 712 | async->buf_read_alloc_count) > 0) { |
4f870fe6 IA |
713 | dev_info(async->subdevice->device->class_dev, |
714 | "attempted to read-free more bytes than have been read-allocated.\n"); | |
ed9eccbe DS |
715 | nbytes = async->buf_read_alloc_count - async->buf_read_count; |
716 | } | |
717 | async->buf_read_count += nbytes; | |
718 | async->buf_read_ptr += nbytes; | |
719 | async->buf_read_ptr %= async->prealloc_bufsz; | |
720 | return nbytes; | |
721 | } | |
d58214b0 | 722 | EXPORT_SYMBOL(comedi_buf_read_free); |
ed9eccbe | 723 | |
d163679c | 724 | void comedi_buf_memcpy_to(struct comedi_async *async, unsigned int offset, |
0a85b6f0 | 725 | const void *data, unsigned int num_bytes) |
ed9eccbe DS |
726 | { |
727 | unsigned int write_ptr = async->buf_write_ptr + offset; | |
728 | ||
729 | if (write_ptr >= async->prealloc_bufsz) | |
730 | write_ptr %= async->prealloc_bufsz; | |
731 | ||
732 | while (num_bytes) { | |
733 | unsigned int block_size; | |
734 | ||
735 | if (write_ptr + num_bytes > async->prealloc_bufsz) | |
736 | block_size = async->prealloc_bufsz - write_ptr; | |
737 | else | |
738 | block_size = num_bytes; | |
739 | ||
740 | memcpy(async->prealloc_buf + write_ptr, data, block_size); | |
741 | ||
742 | data += block_size; | |
743 | num_bytes -= block_size; | |
744 | ||
745 | write_ptr = 0; | |
746 | } | |
747 | } | |
d58214b0 | 748 | EXPORT_SYMBOL(comedi_buf_memcpy_to); |
ed9eccbe | 749 | |
d163679c | 750 | void comedi_buf_memcpy_from(struct comedi_async *async, unsigned int offset, |
0a85b6f0 | 751 | void *dest, unsigned int nbytes) |
ed9eccbe DS |
752 | { |
753 | void *src; | |
754 | unsigned int read_ptr = async->buf_read_ptr + offset; | |
755 | ||
756 | if (read_ptr >= async->prealloc_bufsz) | |
757 | read_ptr %= async->prealloc_bufsz; | |
758 | ||
759 | while (nbytes) { | |
760 | unsigned int block_size; | |
761 | ||
762 | src = async->prealloc_buf + read_ptr; | |
763 | ||
764 | if (nbytes >= async->prealloc_bufsz - read_ptr) | |
765 | block_size = async->prealloc_bufsz - read_ptr; | |
766 | else | |
767 | block_size = nbytes; | |
768 | ||
769 | memcpy(dest, src, block_size); | |
770 | nbytes -= block_size; | |
771 | dest += block_size; | |
772 | read_ptr = 0; | |
773 | } | |
774 | } | |
d58214b0 | 775 | EXPORT_SYMBOL(comedi_buf_memcpy_from); |
ed9eccbe | 776 | |
d163679c | 777 | unsigned int comedi_buf_read_n_available(struct comedi_async *async) |
ed9eccbe DS |
778 | { |
779 | unsigned num_bytes; | |
780 | ||
781 | if (async == NULL) | |
782 | return 0; | |
783 | num_bytes = async->munge_count - async->buf_read_count; | |
784 | /* barrier insures the read of munge_count in this | |
785 | query occurs before any following reads of the buffer which | |
786 | might be based on the return value from this query. | |
787 | */ | |
788 | smp_rmb(); | |
789 | return num_bytes; | |
790 | } | |
d58214b0 | 791 | EXPORT_SYMBOL(comedi_buf_read_n_available); |
ed9eccbe | 792 | |
d163679c | 793 | int comedi_buf_get(struct comedi_async *async, short *x) |
ed9eccbe DS |
794 | { |
795 | unsigned int n = comedi_buf_read_n_available(async); | |
796 | ||
790c5541 | 797 | if (n < sizeof(short)) |
ed9eccbe | 798 | return 0; |
790c5541 | 799 | comedi_buf_read_alloc(async, sizeof(short)); |
0a85b6f0 | 800 | *x = *(short *)(async->prealloc_buf + async->buf_read_ptr); |
790c5541 | 801 | comedi_buf_read_free(async, sizeof(short)); |
ed9eccbe DS |
802 | return 1; |
803 | } | |
d58214b0 | 804 | EXPORT_SYMBOL(comedi_buf_get); |
ed9eccbe | 805 | |
d163679c | 806 | int comedi_buf_put(struct comedi_async *async, short x) |
ed9eccbe | 807 | { |
790c5541 | 808 | unsigned int n = comedi_buf_write_alloc_strict(async, sizeof(short)); |
ed9eccbe | 809 | |
790c5541 | 810 | if (n < sizeof(short)) { |
ed9eccbe DS |
811 | async->events |= COMEDI_CB_ERROR; |
812 | return 0; | |
813 | } | |
0a85b6f0 | 814 | *(short *)(async->prealloc_buf + async->buf_write_ptr) = x; |
790c5541 | 815 | comedi_buf_write_free(async, sizeof(short)); |
ed9eccbe DS |
816 | return 1; |
817 | } | |
d58214b0 | 818 | EXPORT_SYMBOL(comedi_buf_put); |
ed9eccbe | 819 | |
d163679c | 820 | void comedi_reset_async_buf(struct comedi_async *async) |
ed9eccbe DS |
821 | { |
822 | async->buf_write_alloc_count = 0; | |
823 | async->buf_write_count = 0; | |
824 | async->buf_read_alloc_count = 0; | |
825 | async->buf_read_count = 0; | |
826 | ||
827 | async->buf_write_ptr = 0; | |
828 | async->buf_read_ptr = 0; | |
829 | ||
830 | async->cur_chan = 0; | |
831 | async->scan_progress = 0; | |
832 | async->munge_chan = 0; | |
833 | async->munge_count = 0; | |
834 | async->munge_ptr = 0; | |
835 | ||
836 | async->events = 0; | |
837 | } | |
838 | ||
f4011670 IA |
839 | static int |
840 | comedi_auto_config_helper(struct device *hardware_device, | |
841 | struct comedi_driver *driver, | |
842 | int (*attach_wrapper) (struct comedi_device *, | |
843 | void *), void *context) | |
844 | { | |
845 | int minor; | |
846 | struct comedi_device_file_info *dev_file_info; | |
847 | struct comedi_device *comedi_dev; | |
848 | int ret; | |
849 | ||
850 | if (!comedi_autoconfig) | |
851 | return 0; | |
852 | ||
853 | minor = comedi_alloc_board_minor(hardware_device); | |
854 | if (minor < 0) | |
855 | return minor; | |
856 | ||
857 | dev_file_info = comedi_get_device_file_info(minor); | |
858 | comedi_dev = dev_file_info->device; | |
859 | ||
860 | mutex_lock(&comedi_dev->mutex); | |
861 | if (comedi_dev->attached) | |
862 | ret = -EBUSY; | |
4f870fe6 | 863 | else if (!try_module_get(driver->module)) |
f4011670 | 864 | ret = -EIO; |
4f870fe6 | 865 | else { |
f4011670 IA |
866 | /* set comedi_dev->driver here for attach wrapper */ |
867 | comedi_dev->driver = driver; | |
868 | ret = (*attach_wrapper)(comedi_dev, context); | |
869 | if (ret < 0) { | |
870 | module_put(driver->module); | |
871 | __comedi_device_detach(comedi_dev); | |
872 | } else { | |
873 | ret = comedi_device_postconfig(comedi_dev); | |
874 | } | |
875 | } | |
876 | mutex_unlock(&comedi_dev->mutex); | |
877 | ||
878 | if (ret < 0) | |
879 | comedi_free_board_minor(minor); | |
880 | return ret; | |
881 | } | |
882 | ||
cf938c24 IA |
883 | static int comedi_auto_config_wrapper(struct comedi_device *dev, void *context) |
884 | { | |
885 | struct comedi_devconfig *it = context; | |
886 | struct comedi_driver *driv = dev->driver; | |
887 | ||
888 | if (driv->num_names) { | |
889 | /* look for generic board entry matching driver name, which | |
890 | * has already been copied to it->board_name */ | |
891 | dev->board_ptr = comedi_recognize(driv, it->board_name); | |
892 | if (dev->board_ptr == NULL) { | |
4f870fe6 IA |
893 | dev_warn(dev->class_dev, |
894 | "auto config failed to find board entry '%s' for driver '%s'\n", | |
895 | it->board_name, driv->driver_name); | |
cf938c24 IA |
896 | comedi_report_boards(driv); |
897 | return -EINVAL; | |
898 | } | |
899 | } | |
8c3714d6 | 900 | if (!driv->attach) { |
4f870fe6 IA |
901 | dev_warn(dev->class_dev, |
902 | "BUG! driver '%s' using old-style auto config but has no attach handler\n", | |
903 | driv->driver_name); | |
8c3714d6 IA |
904 | return -EINVAL; |
905 | } | |
cf938c24 IA |
906 | return driv->attach(dev, it); |
907 | } | |
908 | ||
7029a874 | 909 | static int comedi_auto_config(struct device *hardware_device, |
63bf3d11 | 910 | struct comedi_driver *driver, const int *options, |
7029a874 | 911 | unsigned num_options) |
ed9eccbe | 912 | { |
0707bb04 | 913 | struct comedi_devconfig it; |
ed9eccbe DS |
914 | |
915 | memset(&it, 0, sizeof(it)); | |
63bf3d11 | 916 | strncpy(it.board_name, driver->driver_name, COMEDI_NAMELEN); |
ed9eccbe DS |
917 | it.board_name[COMEDI_NAMELEN - 1] = '\0'; |
918 | BUG_ON(num_options > COMEDI_NDEVCONFOPTS); | |
919 | memcpy(it.options, options, num_options * sizeof(int)); | |
cf938c24 IA |
920 | return comedi_auto_config_helper(hardware_device, driver, |
921 | comedi_auto_config_wrapper, &it); | |
ed9eccbe DS |
922 | } |
923 | ||
7029a874 | 924 | static void comedi_auto_unconfig(struct device *hardware_device) |
ed9eccbe | 925 | { |
c43435d7 | 926 | int minor; |
ed9eccbe | 927 | |
c43435d7 IA |
928 | if (hardware_device == NULL) |
929 | return; | |
930 | minor = comedi_find_board_minor(hardware_device); | |
931 | if (minor < 0) | |
932 | return; | |
933 | BUG_ON(minor >= COMEDI_NUM_BOARD_MINORS); | |
934 | comedi_free_board_minor(minor); | |
ed9eccbe DS |
935 | } |
936 | ||
55c03cff HS |
937 | /** |
938 | * comedi_pci_enable() - Enable the PCI device and request the regions. | |
939 | * @pdev: pci_dev struct | |
940 | * @res_name: name for the requested reqource | |
941 | */ | |
942 | int comedi_pci_enable(struct pci_dev *pdev, const char *res_name) | |
943 | { | |
944 | int rc; | |
945 | ||
946 | rc = pci_enable_device(pdev); | |
947 | if (rc < 0) | |
948 | return rc; | |
949 | ||
950 | rc = pci_request_regions(pdev, res_name); | |
951 | if (rc < 0) | |
952 | pci_disable_device(pdev); | |
953 | ||
954 | return rc; | |
955 | } | |
956 | EXPORT_SYMBOL_GPL(comedi_pci_enable); | |
957 | ||
958 | /** | |
959 | * comedi_pci_disable() - Release the regions and disable the PCI device. | |
960 | * @pdev: pci_dev struct | |
961 | * | |
962 | * This must be matched with a previous successful call to comedi_pci_enable(). | |
963 | */ | |
964 | void comedi_pci_disable(struct pci_dev *pdev) | |
965 | { | |
966 | pci_release_regions(pdev); | |
967 | pci_disable_device(pdev); | |
968 | } | |
969 | EXPORT_SYMBOL_GPL(comedi_pci_disable); | |
970 | ||
f4011670 IA |
971 | static int comedi_old_pci_auto_config(struct pci_dev *pcidev, |
972 | struct comedi_driver *driver) | |
ed9eccbe DS |
973 | { |
974 | int options[2]; | |
975 | ||
b6c77757 | 976 | /* pci bus */ |
ed9eccbe | 977 | options[0] = pcidev->bus->number; |
b6c77757 | 978 | /* pci slot */ |
ed9eccbe DS |
979 | options[1] = PCI_SLOT(pcidev->devfn); |
980 | ||
63bf3d11 | 981 | return comedi_auto_config(&pcidev->dev, driver, |
8629efa4 | 982 | options, ARRAY_SIZE(options)); |
ed9eccbe | 983 | } |
f4011670 IA |
984 | |
985 | static int comedi_pci_attach_wrapper(struct comedi_device *dev, void *pcidev) | |
986 | { | |
987 | return dev->driver->attach_pci(dev, pcidev); | |
988 | } | |
989 | ||
990 | static int comedi_new_pci_auto_config(struct pci_dev *pcidev, | |
991 | struct comedi_driver *driver) | |
992 | { | |
993 | return comedi_auto_config_helper(&pcidev->dev, driver, | |
994 | comedi_pci_attach_wrapper, pcidev); | |
995 | } | |
996 | ||
997 | int comedi_pci_auto_config(struct pci_dev *pcidev, struct comedi_driver *driver) | |
998 | { | |
999 | ||
1000 | if (driver->attach_pci) | |
1001 | return comedi_new_pci_auto_config(pcidev, driver); | |
1002 | else | |
1003 | return comedi_old_pci_auto_config(pcidev, driver); | |
1004 | } | |
4bf93559 | 1005 | EXPORT_SYMBOL_GPL(comedi_pci_auto_config); |
ed9eccbe DS |
1006 | |
1007 | void comedi_pci_auto_unconfig(struct pci_dev *pcidev) | |
1008 | { | |
1009 | comedi_auto_unconfig(&pcidev->dev); | |
1010 | } | |
4bf93559 | 1011 | EXPORT_SYMBOL_GPL(comedi_pci_auto_unconfig); |
c28264da | 1012 | |
d4899c6f HS |
1013 | int comedi_pci_driver_register(struct comedi_driver *comedi_driver, |
1014 | struct pci_driver *pci_driver) | |
1015 | { | |
1016 | int ret; | |
1017 | ||
1018 | ret = comedi_driver_register(comedi_driver); | |
1019 | if (ret < 0) | |
1020 | return ret; | |
1021 | ||
1022 | /* FIXME: Remove this test after auditing all comedi pci drivers */ | |
1023 | if (!pci_driver->name) | |
1024 | pci_driver->name = comedi_driver->driver_name; | |
1025 | ||
1026 | ret = pci_register_driver(pci_driver); | |
1027 | if (ret < 0) { | |
1028 | comedi_driver_unregister(comedi_driver); | |
1029 | return ret; | |
1030 | } | |
1031 | ||
1032 | return 0; | |
1033 | } | |
1034 | EXPORT_SYMBOL_GPL(comedi_pci_driver_register); | |
1035 | ||
1036 | void comedi_pci_driver_unregister(struct comedi_driver *comedi_driver, | |
1037 | struct pci_driver *pci_driver) | |
1038 | { | |
1039 | pci_unregister_driver(pci_driver); | |
1040 | comedi_driver_unregister(comedi_driver); | |
1041 | } | |
1042 | EXPORT_SYMBOL_GPL(comedi_pci_driver_unregister); | |
1043 | ||
78b10615 RD |
1044 | #if IS_ENABLED(CONFIG_USB) |
1045 | ||
f4011670 IA |
1046 | static int comedi_old_usb_auto_config(struct usb_interface *intf, |
1047 | struct comedi_driver *driver) | |
1048 | { | |
63bf3d11 | 1049 | return comedi_auto_config(&intf->dev, driver, NULL, 0); |
f4011670 IA |
1050 | } |
1051 | ||
1052 | static int comedi_usb_attach_wrapper(struct comedi_device *dev, void *intf) | |
1053 | { | |
1054 | return dev->driver->attach_usb(dev, intf); | |
1055 | } | |
1056 | ||
1057 | static int comedi_new_usb_auto_config(struct usb_interface *intf, | |
1058 | struct comedi_driver *driver) | |
1059 | { | |
1060 | return comedi_auto_config_helper(&intf->dev, driver, | |
1061 | comedi_usb_attach_wrapper, intf); | |
1062 | } | |
1063 | ||
d8b6ca08 | 1064 | int comedi_usb_auto_config(struct usb_interface *intf, |
4c093a6d | 1065 | struct comedi_driver *driver) |
c28264da | 1066 | { |
d8b6ca08 | 1067 | BUG_ON(intf == NULL); |
f4011670 IA |
1068 | if (driver->attach_usb) |
1069 | return comedi_new_usb_auto_config(intf, driver); | |
1070 | else | |
1071 | return comedi_old_usb_auto_config(intf, driver); | |
c28264da | 1072 | } |
4bf93559 | 1073 | EXPORT_SYMBOL_GPL(comedi_usb_auto_config); |
c28264da | 1074 | |
d8b6ca08 | 1075 | void comedi_usb_auto_unconfig(struct usb_interface *intf) |
c28264da | 1076 | { |
d8b6ca08 IA |
1077 | BUG_ON(intf == NULL); |
1078 | comedi_auto_unconfig(&intf->dev); | |
c28264da | 1079 | } |
4bf93559 | 1080 | EXPORT_SYMBOL_GPL(comedi_usb_auto_unconfig); |
64255031 HS |
1081 | |
1082 | int comedi_usb_driver_register(struct comedi_driver *comedi_driver, | |
1083 | struct usb_driver *usb_driver) | |
1084 | { | |
1085 | int ret; | |
1086 | ||
1087 | ret = comedi_driver_register(comedi_driver); | |
1088 | if (ret < 0) | |
1089 | return ret; | |
1090 | ||
1091 | ret = usb_register(usb_driver); | |
1092 | if (ret < 0) { | |
1093 | comedi_driver_unregister(comedi_driver); | |
1094 | return ret; | |
1095 | } | |
1096 | ||
1097 | return 0; | |
1098 | } | |
1099 | EXPORT_SYMBOL_GPL(comedi_usb_driver_register); | |
1100 | ||
1101 | void comedi_usb_driver_unregister(struct comedi_driver *comedi_driver, | |
1102 | struct usb_driver *usb_driver) | |
1103 | { | |
1104 | usb_deregister(usb_driver); | |
1105 | comedi_driver_unregister(comedi_driver); | |
1106 | } | |
1107 | EXPORT_SYMBOL_GPL(comedi_usb_driver_unregister); | |
78b10615 RD |
1108 | |
1109 | #endif |