3 functions for manipulating drivers
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
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.
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.
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.
24 #include <linux/device.h>
25 #include <linux/module.h>
26 #include <linux/pci.h>
27 #include <linux/usb.h>
28 #include <linux/errno.h>
29 #include <linux/kconfig.h>
30 #include <linux/kernel.h>
31 #include <linux/sched.h>
32 #include <linux/fcntl.h>
33 #include <linux/delay.h>
34 #include <linux/ioport.h>
36 #include <linux/slab.h>
37 #include <linux/highmem.h> /* for SuSE brokenness */
38 #include <linux/vmalloc.h>
39 #include <linux/cdev.h>
40 #include <linux/dma-mapping.h>
43 #include "comedidev.h"
44 #include "comedi_internal.h"
46 static int postconfig(struct comedi_device *dev);
47 static int insn_rw_emulate_bits(struct comedi_device *dev,
48 struct comedi_subdevice *s,
49 struct comedi_insn *insn, unsigned int *data);
50 static void *comedi_recognize(struct comedi_driver *driv, const char *name);
51 static void comedi_report_boards(struct comedi_driver *driv);
52 static int poll_invalid(struct comedi_device *dev, struct comedi_subdevice *s);
54 struct comedi_driver *comedi_drivers;
56 int comedi_alloc_subdevices(struct comedi_device *dev, int num_subdevices)
58 struct comedi_subdevice *s;
61 if (num_subdevices < 1)
64 s = kcalloc(num_subdevices, sizeof(*s), GFP_KERNEL);
68 dev->n_subdevices = num_subdevices;
70 for (i = 0; i < num_subdevices; ++i) {
71 s = &dev->subdevices[i];
73 s->async_dma_dir = DMA_NONE;
74 spin_lock_init(&s->spin_lock);
79 EXPORT_SYMBOL_GPL(comedi_alloc_subdevices);
81 static void cleanup_device(struct comedi_device *dev)
84 struct comedi_subdevice *s;
86 if (dev->subdevices) {
87 for (i = 0; i < dev->n_subdevices; i++) {
88 s = &dev->subdevices[i];
89 comedi_free_subdevice_minor(s);
91 comedi_buf_alloc(dev, s, 0);
95 kfree(dev->subdevices);
96 dev->subdevices = NULL;
97 dev->n_subdevices = 0;
102 dev->board_name = NULL;
103 dev->board_ptr = NULL;
106 dev->read_subdev = NULL;
107 dev->write_subdev = NULL;
110 comedi_set_hw_dev(dev, NULL);
113 static void __comedi_device_detach(struct comedi_device *dev)
117 dev->driver->detach(dev);
119 dev_warn(dev->class_dev,
120 "BUG: dev->driver=NULL in comedi_device_detach()\n");
124 void comedi_device_detach(struct comedi_device *dev)
128 __comedi_device_detach(dev);
131 /* do a little post-config cleanup */
132 /* called with module refcount incremented, decrements it */
133 static int comedi_device_postconfig(struct comedi_device *dev)
135 int ret = postconfig(dev);
136 module_put(dev->driver->module);
138 __comedi_device_detach(dev);
141 if (!dev->board_name) {
142 dev_warn(dev->class_dev, "BUG: dev->board_name=NULL\n");
143 dev->board_name = "BUG";
150 int comedi_device_attach(struct comedi_device *dev, struct comedi_devconfig *it)
152 struct comedi_driver *driv;
158 for (driv = comedi_drivers; driv; driv = driv->next) {
159 if (!try_module_get(driv->module))
161 if (driv->num_names) {
162 dev->board_ptr = comedi_recognize(driv, it->board_name);
165 } else if (strcmp(driv->driver_name, it->board_name) == 0)
167 module_put(driv->module);
170 /* recognize has failed if we get here */
171 /* report valid board names before returning error */
172 for (driv = comedi_drivers; driv; driv = driv->next) {
173 if (!try_module_get(driv->module))
175 comedi_report_boards(driv);
176 module_put(driv->module);
180 if (driv->attach == NULL) {
181 /* driver does not support manual configuration */
182 dev_warn(dev->class_dev,
183 "driver '%s' does not support attach using comedi_config\n",
185 module_put(driv->module);
188 /* initialize dev->driver here so
189 * comedi_error() can be called from attach */
191 ret = driv->attach(dev, it);
193 module_put(dev->driver->module);
194 __comedi_device_detach(dev);
197 return comedi_device_postconfig(dev);
200 int comedi_driver_register(struct comedi_driver *driver)
202 driver->next = comedi_drivers;
203 comedi_drivers = driver;
207 EXPORT_SYMBOL(comedi_driver_register);
209 int comedi_driver_unregister(struct comedi_driver *driver)
211 struct comedi_driver *prev;
214 /* check for devices using this driver */
215 for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) {
216 struct comedi_device_file_info *dev_file_info =
217 comedi_get_device_file_info(i);
218 struct comedi_device *dev;
220 if (dev_file_info == NULL)
222 dev = dev_file_info->device;
224 mutex_lock(&dev->mutex);
225 if (dev->attached && dev->driver == driver) {
227 dev_warn(dev->class_dev,
228 "BUG! detaching device with use_count=%d\n",
230 comedi_device_detach(dev);
232 mutex_unlock(&dev->mutex);
235 if (comedi_drivers == driver) {
236 comedi_drivers = driver->next;
240 for (prev = comedi_drivers; prev->next; prev = prev->next) {
241 if (prev->next == driver) {
242 prev->next = driver->next;
248 EXPORT_SYMBOL(comedi_driver_unregister);
250 static int postconfig(struct comedi_device *dev)
253 struct comedi_subdevice *s;
254 struct comedi_async *async = NULL;
257 for (i = 0; i < dev->n_subdevices; i++) {
258 s = &dev->subdevices[i];
260 if (s->type == COMEDI_SUBD_UNUSED)
263 if (s->len_chanlist == 0)
267 unsigned int buf_size;
269 BUG_ON((s->subdev_flags & (SDF_CMD_READ |
270 SDF_CMD_WRITE)) == 0);
271 BUG_ON(!s->do_cmdtest);
274 kzalloc(sizeof(struct comedi_async), GFP_KERNEL);
276 dev_warn(dev->class_dev,
277 "failed to allocate async struct\n");
280 init_waitqueue_head(&async->wait_head);
281 async->subdevice = s;
285 comedi_default_buf_maxsize_kb * 1024;
286 buf_size = comedi_default_buf_size_kb * 1024;
287 if (buf_size > async->max_bufsize)
288 buf_size = async->max_bufsize;
290 async->prealloc_buf = NULL;
291 async->prealloc_bufsz = 0;
292 if (comedi_buf_alloc(dev, s, buf_size) < 0) {
293 dev_warn(dev->class_dev,
294 "Buffer allocation failed\n");
298 ret = s->buf_change(dev, s, buf_size);
302 comedi_alloc_subdevice_minor(dev, s);
305 if (!s->range_table && !s->range_table_list)
306 s->range_table = &range_unknown;
308 if (!s->insn_read && s->insn_bits)
309 s->insn_read = insn_rw_emulate_bits;
310 if (!s->insn_write && s->insn_bits)
311 s->insn_write = insn_rw_emulate_bits;
314 s->insn_read = insn_inval;
316 s->insn_write = insn_inval;
318 s->insn_bits = insn_inval;
320 s->insn_config = insn_inval;
323 s->poll = poll_invalid;
330 * Generic recognize function for drivers that register their supported
333 * 'driv->board_name' points to a 'const char *' member within the
334 * zeroth element of an array of some private board information
335 * structure, say 'struct foo_board' containing a member 'const char
336 * *board_name' that is initialized to point to a board name string that
337 * is one of the candidates matched against this function's 'name'
340 * 'driv->offset' is the size of the private board information
341 * structure, say 'sizeof(struct foo_board)', and 'driv->num_names' is
342 * the length of the array of private board information structures.
344 * If one of the board names in the array of private board information
345 * structures matches the name supplied to this function, the function
346 * returns a pointer to the pointer to the board name, otherwise it
347 * returns NULL. The return value ends up in the 'board_ptr' member of
348 * a 'struct comedi_device' that the low-level comedi driver's
349 * 'attach()' hook can convert to a point to a particular element of its
350 * array of private board information structures by subtracting the
351 * offset of the member that points to the board name. (No subtraction
352 * is required if the board name pointer is the first member of the
353 * private board information structure, which is generally the case.)
355 static void *comedi_recognize(struct comedi_driver *driv, const char *name)
357 char **name_ptr = (char **)driv->board_name;
360 for (i = 0; i < driv->num_names; i++) {
361 if (strcmp(*name_ptr, name) == 0)
363 name_ptr = (void *)name_ptr + driv->offset;
369 static void comedi_report_boards(struct comedi_driver *driv)
372 const char *const *name_ptr;
374 pr_info("comedi: valid board names for %s driver are:\n",
377 name_ptr = driv->board_name;
378 for (i = 0; i < driv->num_names; i++) {
379 pr_info(" %s\n", *name_ptr);
380 name_ptr = (const char **)((char *)name_ptr + driv->offset);
383 if (driv->num_names == 0)
384 pr_info(" %s\n", driv->driver_name);
387 static int poll_invalid(struct comedi_device *dev, struct comedi_subdevice *s)
392 int insn_inval(struct comedi_device *dev, struct comedi_subdevice *s,
393 struct comedi_insn *insn, unsigned int *data)
398 static int insn_rw_emulate_bits(struct comedi_device *dev,
399 struct comedi_subdevice *s,
400 struct comedi_insn *insn, unsigned int *data)
402 struct comedi_insn new_insn;
404 static const unsigned channels_per_bitfield = 32;
406 unsigned chan = CR_CHAN(insn->chanspec);
407 const unsigned base_bitfield_channel =
408 (chan < channels_per_bitfield) ? 0 : chan;
409 unsigned int new_data[2];
410 memset(new_data, 0, sizeof(new_data));
411 memset(&new_insn, 0, sizeof(new_insn));
412 new_insn.insn = INSN_BITS;
413 new_insn.chanspec = base_bitfield_channel;
415 new_insn.subdev = insn->subdev;
417 if (insn->insn == INSN_WRITE) {
418 if (!(s->subdev_flags & SDF_WRITABLE))
420 new_data[0] = 1 << (chan - base_bitfield_channel); /* mask */
421 new_data[1] = data[0] ? (1 << (chan - base_bitfield_channel))
425 ret = s->insn_bits(dev, s, &new_insn, new_data);
429 if (insn->insn == INSN_READ)
430 data[0] = (new_data[1] >> (chan - base_bitfield_channel)) & 1;
435 int comedi_buf_alloc(struct comedi_device *dev, struct comedi_subdevice *s,
436 unsigned long new_size)
438 struct comedi_async *async = s->async;
440 /* Round up new_size to multiple of PAGE_SIZE */
441 new_size = (new_size + PAGE_SIZE - 1) & PAGE_MASK;
443 /* if no change is required, do nothing */
444 if (async->prealloc_buf && async->prealloc_bufsz == new_size)
447 /* deallocate old buffer */
448 if (async->prealloc_buf) {
449 vunmap(async->prealloc_buf);
450 async->prealloc_buf = NULL;
451 async->prealloc_bufsz = 0;
453 if (async->buf_page_list) {
455 for (i = 0; i < async->n_buf_pages; ++i) {
456 if (async->buf_page_list[i].virt_addr) {
457 clear_bit(PG_reserved,
458 &(virt_to_page(async->buf_page_list[i].
460 if (s->async_dma_dir != DMA_NONE) {
461 dma_free_coherent(dev->hw_dev,
470 free_page((unsigned long)
471 async->buf_page_list[i].
476 vfree(async->buf_page_list);
477 async->buf_page_list = NULL;
478 async->n_buf_pages = 0;
480 /* allocate new buffer */
483 unsigned n_pages = new_size >> PAGE_SHIFT;
484 struct page **pages = NULL;
486 async->buf_page_list =
487 vzalloc(sizeof(struct comedi_buf_page) * n_pages);
488 if (async->buf_page_list)
489 pages = vmalloc(sizeof(struct page *) * n_pages);
492 for (i = 0; i < n_pages; i++) {
493 if (s->async_dma_dir != DMA_NONE) {
494 async->buf_page_list[i].virt_addr =
495 dma_alloc_coherent(dev->hw_dev,
503 async->buf_page_list[i].virt_addr =
505 get_zeroed_page(GFP_KERNEL);
507 if (async->buf_page_list[i].virt_addr == NULL)
511 &(virt_to_page(async->buf_page_list[i].
513 pages[i] = virt_to_page(async->buf_page_list[i].
518 async->prealloc_buf =
519 #ifdef PAGE_KERNEL_NOCACHE
520 vmap(pages, n_pages, VM_MAP, PAGE_KERNEL_NOCACHE);
522 vmap(pages, n_pages, VM_MAP, PAGE_KERNEL);
527 if (async->prealloc_buf == NULL) {
528 /* Some allocation failed above. */
529 if (async->buf_page_list) {
530 for (i = 0; i < n_pages; i++) {
531 if (async->buf_page_list[i].virt_addr ==
535 clear_bit(PG_reserved,
536 &(virt_to_page(async->
539 if (s->async_dma_dir != DMA_NONE) {
540 dma_free_coherent(dev->hw_dev,
549 free_page((unsigned long)
554 vfree(async->buf_page_list);
555 async->buf_page_list = NULL;
559 async->n_buf_pages = n_pages;
561 async->prealloc_bufsz = new_size;
566 /* munging is applied to data by core as it passes between user
567 * and kernel space */
568 static unsigned int comedi_buf_munge(struct comedi_async *async,
569 unsigned int num_bytes)
571 struct comedi_subdevice *s = async->subdevice;
572 unsigned int count = 0;
573 const unsigned num_sample_bytes = bytes_per_sample(s);
575 if (s->munge == NULL || (async->cmd.flags & CMDF_RAWDATA)) {
576 async->munge_count += num_bytes;
577 BUG_ON((int)(async->munge_count - async->buf_write_count) > 0);
580 /* don't munge partial samples */
581 num_bytes -= num_bytes % num_sample_bytes;
582 while (count < num_bytes) {
585 block_size = num_bytes - count;
586 if (block_size < 0) {
587 dev_warn(s->device->class_dev,
588 "%s: %s: bug! block_size is negative\n",
592 if ((int)(async->munge_ptr + block_size -
593 async->prealloc_bufsz) > 0)
594 block_size = async->prealloc_bufsz - async->munge_ptr;
596 s->munge(s->device, s, async->prealloc_buf + async->munge_ptr,
597 block_size, async->munge_chan);
599 smp_wmb(); /* barrier insures data is munged in buffer
600 * before munge_count is incremented */
602 async->munge_chan += block_size / num_sample_bytes;
603 async->munge_chan %= async->cmd.chanlist_len;
604 async->munge_count += block_size;
605 async->munge_ptr += block_size;
606 async->munge_ptr %= async->prealloc_bufsz;
609 BUG_ON((int)(async->munge_count - async->buf_write_count) > 0);
613 unsigned int comedi_buf_write_n_available(struct comedi_async *async)
615 unsigned int free_end;
621 free_end = async->buf_read_count + async->prealloc_bufsz;
622 nbytes = free_end - async->buf_write_alloc_count;
623 nbytes -= nbytes % bytes_per_sample(async->subdevice);
624 /* barrier insures the read of buf_read_count in this
625 query occurs before any following writes to the buffer which
626 might be based on the return value from this query.
632 /* allocates chunk for the writer from free buffer space */
633 unsigned int comedi_buf_write_alloc(struct comedi_async *async,
636 unsigned int free_end = async->buf_read_count + async->prealloc_bufsz;
638 if ((int)(async->buf_write_alloc_count + nbytes - free_end) > 0)
639 nbytes = free_end - async->buf_write_alloc_count;
641 async->buf_write_alloc_count += nbytes;
642 /* barrier insures the read of buf_read_count above occurs before
643 we write data to the write-alloc'ed buffer space */
647 EXPORT_SYMBOL(comedi_buf_write_alloc);
649 /* allocates nothing unless it can completely fulfill the request */
650 unsigned int comedi_buf_write_alloc_strict(struct comedi_async *async,
653 unsigned int free_end = async->buf_read_count + async->prealloc_bufsz;
655 if ((int)(async->buf_write_alloc_count + nbytes - free_end) > 0)
658 async->buf_write_alloc_count += nbytes;
659 /* barrier insures the read of buf_read_count above occurs before
660 we write data to the write-alloc'ed buffer space */
665 /* transfers a chunk from writer to filled buffer space */
666 unsigned comedi_buf_write_free(struct comedi_async *async, unsigned int nbytes)
668 if ((int)(async->buf_write_count + nbytes -
669 async->buf_write_alloc_count) > 0) {
670 dev_info(async->subdevice->device->class_dev,
671 "attempted to write-free more bytes than have been write-allocated.\n");
672 nbytes = async->buf_write_alloc_count - async->buf_write_count;
674 async->buf_write_count += nbytes;
675 async->buf_write_ptr += nbytes;
676 comedi_buf_munge(async, async->buf_write_count - async->munge_count);
677 if (async->buf_write_ptr >= async->prealloc_bufsz)
678 async->buf_write_ptr %= async->prealloc_bufsz;
682 EXPORT_SYMBOL(comedi_buf_write_free);
684 /* allocates a chunk for the reader from filled (and munged) buffer space */
685 unsigned comedi_buf_read_alloc(struct comedi_async *async, unsigned nbytes)
687 if ((int)(async->buf_read_alloc_count + nbytes - async->munge_count) >
689 nbytes = async->munge_count - async->buf_read_alloc_count;
691 async->buf_read_alloc_count += nbytes;
692 /* barrier insures read of munge_count occurs before we actually read
693 data out of buffer */
697 EXPORT_SYMBOL(comedi_buf_read_alloc);
699 /* transfers control of a chunk from reader to free buffer space */
700 unsigned comedi_buf_read_free(struct comedi_async *async, unsigned int nbytes)
702 /* barrier insures data has been read out of
703 * buffer before read count is incremented */
705 if ((int)(async->buf_read_count + nbytes -
706 async->buf_read_alloc_count) > 0) {
707 dev_info(async->subdevice->device->class_dev,
708 "attempted to read-free more bytes than have been read-allocated.\n");
709 nbytes = async->buf_read_alloc_count - async->buf_read_count;
711 async->buf_read_count += nbytes;
712 async->buf_read_ptr += nbytes;
713 async->buf_read_ptr %= async->prealloc_bufsz;
716 EXPORT_SYMBOL(comedi_buf_read_free);
718 void comedi_buf_memcpy_to(struct comedi_async *async, unsigned int offset,
719 const void *data, unsigned int num_bytes)
721 unsigned int write_ptr = async->buf_write_ptr + offset;
723 if (write_ptr >= async->prealloc_bufsz)
724 write_ptr %= async->prealloc_bufsz;
727 unsigned int block_size;
729 if (write_ptr + num_bytes > async->prealloc_bufsz)
730 block_size = async->prealloc_bufsz - write_ptr;
732 block_size = num_bytes;
734 memcpy(async->prealloc_buf + write_ptr, data, block_size);
737 num_bytes -= block_size;
742 EXPORT_SYMBOL(comedi_buf_memcpy_to);
744 void comedi_buf_memcpy_from(struct comedi_async *async, unsigned int offset,
745 void *dest, unsigned int nbytes)
748 unsigned int read_ptr = async->buf_read_ptr + offset;
750 if (read_ptr >= async->prealloc_bufsz)
751 read_ptr %= async->prealloc_bufsz;
754 unsigned int block_size;
756 src = async->prealloc_buf + read_ptr;
758 if (nbytes >= async->prealloc_bufsz - read_ptr)
759 block_size = async->prealloc_bufsz - read_ptr;
763 memcpy(dest, src, block_size);
764 nbytes -= block_size;
769 EXPORT_SYMBOL(comedi_buf_memcpy_from);
771 unsigned int comedi_buf_read_n_available(struct comedi_async *async)
777 num_bytes = async->munge_count - async->buf_read_count;
778 /* barrier insures the read of munge_count in this
779 query occurs before any following reads of the buffer which
780 might be based on the return value from this query.
785 EXPORT_SYMBOL(comedi_buf_read_n_available);
787 int comedi_buf_get(struct comedi_async *async, short *x)
789 unsigned int n = comedi_buf_read_n_available(async);
791 if (n < sizeof(short))
793 comedi_buf_read_alloc(async, sizeof(short));
794 *x = *(short *)(async->prealloc_buf + async->buf_read_ptr);
795 comedi_buf_read_free(async, sizeof(short));
798 EXPORT_SYMBOL(comedi_buf_get);
800 int comedi_buf_put(struct comedi_async *async, short x)
802 unsigned int n = comedi_buf_write_alloc_strict(async, sizeof(short));
804 if (n < sizeof(short)) {
805 async->events |= COMEDI_CB_ERROR;
808 *(short *)(async->prealloc_buf + async->buf_write_ptr) = x;
809 comedi_buf_write_free(async, sizeof(short));
812 EXPORT_SYMBOL(comedi_buf_put);
814 void comedi_reset_async_buf(struct comedi_async *async)
816 async->buf_write_alloc_count = 0;
817 async->buf_write_count = 0;
818 async->buf_read_alloc_count = 0;
819 async->buf_read_count = 0;
821 async->buf_write_ptr = 0;
822 async->buf_read_ptr = 0;
825 async->scan_progress = 0;
826 async->munge_chan = 0;
827 async->munge_count = 0;
828 async->munge_ptr = 0;
833 int comedi_auto_config(struct device *hardware_device,
834 struct comedi_driver *driver, unsigned long context)
837 struct comedi_device_file_info *dev_file_info;
838 struct comedi_device *comedi_dev;
841 if (!comedi_autoconfig)
844 if (!driver->auto_attach) {
845 dev_warn(hardware_device,
846 "BUG! comedi driver '%s' has no auto_attach handler\n",
847 driver->driver_name);
851 minor = comedi_alloc_board_minor(hardware_device);
855 dev_file_info = comedi_get_device_file_info(minor);
856 comedi_dev = dev_file_info->device;
858 mutex_lock(&comedi_dev->mutex);
859 if (comedi_dev->attached)
861 else if (!try_module_get(driver->module))
864 comedi_set_hw_dev(comedi_dev, hardware_device);
865 comedi_dev->driver = driver;
866 ret = driver->auto_attach(comedi_dev, context);
868 module_put(driver->module);
869 __comedi_device_detach(comedi_dev);
871 ret = comedi_device_postconfig(comedi_dev);
874 mutex_unlock(&comedi_dev->mutex);
877 comedi_free_board_minor(minor);
880 EXPORT_SYMBOL_GPL(comedi_auto_config);
882 void comedi_auto_unconfig(struct device *hardware_device)
886 if (hardware_device == NULL)
888 minor = comedi_find_board_minor(hardware_device);
891 BUG_ON(minor >= COMEDI_NUM_BOARD_MINORS);
892 comedi_free_board_minor(minor);
894 EXPORT_SYMBOL_GPL(comedi_auto_unconfig);
897 * comedi_pci_enable() - Enable the PCI device and request the regions.
898 * @pdev: pci_dev struct
899 * @res_name: name for the requested reqource
901 int comedi_pci_enable(struct pci_dev *pdev, const char *res_name)
905 rc = pci_enable_device(pdev);
909 rc = pci_request_regions(pdev, res_name);
911 pci_disable_device(pdev);
915 EXPORT_SYMBOL_GPL(comedi_pci_enable);
918 * comedi_pci_disable() - Release the regions and disable the PCI device.
919 * @pdev: pci_dev struct
921 * This must be matched with a previous successful call to comedi_pci_enable().
923 void comedi_pci_disable(struct pci_dev *pdev)
925 pci_release_regions(pdev);
926 pci_disable_device(pdev);
928 EXPORT_SYMBOL_GPL(comedi_pci_disable);
930 int comedi_pci_driver_register(struct comedi_driver *comedi_driver,
931 struct pci_driver *pci_driver)
935 ret = comedi_driver_register(comedi_driver);
939 /* FIXME: Remove this test after auditing all comedi pci drivers */
940 if (!pci_driver->name)
941 pci_driver->name = comedi_driver->driver_name;
943 ret = pci_register_driver(pci_driver);
945 comedi_driver_unregister(comedi_driver);
951 EXPORT_SYMBOL_GPL(comedi_pci_driver_register);
953 void comedi_pci_driver_unregister(struct comedi_driver *comedi_driver,
954 struct pci_driver *pci_driver)
956 pci_unregister_driver(pci_driver);
957 comedi_driver_unregister(comedi_driver);
959 EXPORT_SYMBOL_GPL(comedi_pci_driver_unregister);
961 #if IS_ENABLED(CONFIG_USB)
963 int comedi_usb_driver_register(struct comedi_driver *comedi_driver,
964 struct usb_driver *usb_driver)
968 ret = comedi_driver_register(comedi_driver);
972 ret = usb_register(usb_driver);
974 comedi_driver_unregister(comedi_driver);
980 EXPORT_SYMBOL_GPL(comedi_usb_driver_register);
982 void comedi_usb_driver_unregister(struct comedi_driver *comedi_driver,
983 struct usb_driver *usb_driver)
985 usb_deregister(usb_driver);
986 comedi_driver_unregister(comedi_driver);
988 EXPORT_SYMBOL_GPL(comedi_usb_driver_unregister);