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.
26 #define __NO_VERSION__
27 #include "comedi_fops.h"
28 #include <linux/device.h>
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/usb.h>
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>
39 #include <linux/slab.h>
40 #include "comedidev.h"
42 #include <linux/highmem.h> /* for SuSE brokenness */
43 #include <linux/vmalloc.h>
44 #include <linux/cdev.h>
45 #include <linux/dma-mapping.h>
48 #include <asm/system.h>
50 static int postconfig(struct comedi_device
*dev
);
51 static int insn_rw_emulate_bits(struct comedi_device
*dev
,
52 struct comedi_subdevice
*s
,
53 struct comedi_insn
*insn
, unsigned int *data
);
54 static void *comedi_recognize(struct comedi_driver
*driv
, const char *name
);
55 static void comedi_report_boards(struct comedi_driver
*driv
);
56 static int poll_invalid(struct comedi_device
*dev
, struct comedi_subdevice
*s
);
57 int comedi_buf_alloc(struct comedi_device
*dev
, struct comedi_subdevice
*s
,
58 unsigned long new_size
);
60 struct comedi_driver
*comedi_drivers
;
62 int comedi_modprobe(int minor
)
67 static void cleanup_device(struct comedi_device
*dev
)
70 struct comedi_subdevice
*s
;
72 if (dev
->subdevices
) {
73 for (i
= 0; i
< dev
->n_subdevices
; i
++) {
74 s
= dev
->subdevices
+ i
;
75 comedi_free_subdevice_minor(s
);
77 comedi_buf_alloc(dev
, s
, 0);
81 kfree(dev
->subdevices
);
82 dev
->subdevices
= NULL
;
83 dev
->n_subdevices
= 0;
88 dev
->board_name
= NULL
;
89 dev
->board_ptr
= NULL
;
92 dev
->read_subdev
= NULL
;
93 dev
->write_subdev
= NULL
;
96 comedi_set_hw_dev(dev
, NULL
);
99 static void __comedi_device_detach(struct comedi_device
*dev
)
103 dev
->driver
->detach(dev
);
105 printk("BUG: dev->driver=NULL in comedi_device_detach()\n");
109 void comedi_device_detach(struct comedi_device
*dev
)
113 __comedi_device_detach(dev
);
116 int comedi_device_attach(struct comedi_device
*dev
, struct comedi_devconfig
*it
)
118 struct comedi_driver
*driv
;
124 for (driv
= comedi_drivers
; driv
; driv
= driv
->next
) {
125 if (!try_module_get(driv
->module
)) {
127 ("comedi: failed to increment module count, skipping\n");
130 if (driv
->num_names
) {
131 dev
->board_ptr
= comedi_recognize(driv
, it
->board_name
);
132 if (dev
->board_ptr
== NULL
) {
133 module_put(driv
->module
);
137 if (strcmp(driv
->driver_name
, it
->board_name
)) {
138 module_put(driv
->module
);
142 /* initialize dev->driver here so comedi_error() can be called from attach */
144 ret
= driv
->attach(dev
, it
);
146 module_put(dev
->driver
->module
);
147 __comedi_device_detach(dev
);
153 /* recognize has failed if we get here */
154 /* report valid board names before returning error */
155 for (driv
= comedi_drivers
; driv
; driv
= driv
->next
) {
156 if (!try_module_get(driv
->module
)) {
157 printk("comedi: failed to increment module count\n");
160 comedi_report_boards(driv
);
161 module_put(driv
->module
);
166 /* do a little post-config cleanup */
167 ret
= postconfig(dev
);
168 module_put(dev
->driver
->module
);
170 __comedi_device_detach(dev
);
174 if (!dev
->board_name
) {
175 printk("BUG: dev->board_name=<%p>\n", dev
->board_name
);
176 dev
->board_name
= "BUG";
184 int comedi_driver_register(struct comedi_driver
*driver
)
186 driver
->next
= comedi_drivers
;
187 comedi_drivers
= driver
;
192 int comedi_driver_unregister(struct comedi_driver
*driver
)
194 struct comedi_driver
*prev
;
197 /* check for devices using this driver */
198 for (i
= 0; i
< COMEDI_NUM_BOARD_MINORS
; i
++) {
199 struct comedi_device_file_info
*dev_file_info
=
200 comedi_get_device_file_info(i
);
201 struct comedi_device
*dev
;
203 if (dev_file_info
== NULL
)
205 dev
= dev_file_info
->device
;
207 mutex_lock(&dev
->mutex
);
208 if (dev
->attached
&& dev
->driver
== driver
) {
211 ("BUG! detaching device with use_count=%d\n",
213 comedi_device_detach(dev
);
215 mutex_unlock(&dev
->mutex
);
218 if (comedi_drivers
== driver
) {
219 comedi_drivers
= driver
->next
;
223 for (prev
= comedi_drivers
; prev
->next
; prev
= prev
->next
) {
224 if (prev
->next
== driver
) {
225 prev
->next
= driver
->next
;
232 static int postconfig(struct comedi_device
*dev
)
235 struct comedi_subdevice
*s
;
236 struct comedi_async
*async
= NULL
;
239 for (i
= 0; i
< dev
->n_subdevices
; i
++) {
240 s
= dev
->subdevices
+ i
;
242 if (s
->type
== COMEDI_SUBD_UNUSED
)
245 if (s
->len_chanlist
== 0)
249 BUG_ON((s
->subdev_flags
& (SDF_CMD_READ
|
250 SDF_CMD_WRITE
)) == 0);
251 BUG_ON(!s
->do_cmdtest
);
254 kzalloc(sizeof(struct comedi_async
), GFP_KERNEL
);
256 printk("failed to allocate async struct\n");
259 init_waitqueue_head(&async
->wait_head
);
260 async
->subdevice
= s
;
263 #define DEFAULT_BUF_MAXSIZE (64*1024)
264 #define DEFAULT_BUF_SIZE (64*1024)
266 async
->max_bufsize
= DEFAULT_BUF_MAXSIZE
;
268 async
->prealloc_buf
= NULL
;
269 async
->prealloc_bufsz
= 0;
270 if (comedi_buf_alloc(dev
, s
, DEFAULT_BUF_SIZE
) < 0) {
271 printk("Buffer allocation failed\n");
275 ret
= s
->buf_change(dev
, s
, DEFAULT_BUF_SIZE
);
279 comedi_alloc_subdevice_minor(dev
, s
);
282 if (!s
->range_table
&& !s
->range_table_list
)
283 s
->range_table
= &range_unknown
;
285 if (!s
->insn_read
&& s
->insn_bits
)
286 s
->insn_read
= insn_rw_emulate_bits
;
287 if (!s
->insn_write
&& s
->insn_bits
)
288 s
->insn_write
= insn_rw_emulate_bits
;
291 s
->insn_read
= insn_inval
;
293 s
->insn_write
= insn_inval
;
295 s
->insn_bits
= insn_inval
;
297 s
->insn_config
= insn_inval
;
300 s
->poll
= poll_invalid
;
306 /* generic recognize function for drivers that register their supported board names */
307 void *comedi_recognize(struct comedi_driver
*driv
, const char *name
)
310 const char *const *name_ptr
= driv
->board_name
;
311 for (i
= 0; i
< driv
->num_names
; i
++) {
312 if (strcmp(*name_ptr
, name
) == 0)
313 return (void *)name_ptr
;
315 (const char *const *)((const char *)name_ptr
+
322 void comedi_report_boards(struct comedi_driver
*driv
)
325 const char *const *name_ptr
;
327 printk("comedi: valid board names for %s driver are:\n",
330 name_ptr
= driv
->board_name
;
331 for (i
= 0; i
< driv
->num_names
; i
++) {
332 printk(" %s\n", *name_ptr
);
333 name_ptr
= (const char **)((char *)name_ptr
+ driv
->offset
);
336 if (driv
->num_names
== 0)
337 printk(" %s\n", driv
->driver_name
);
340 static int poll_invalid(struct comedi_device
*dev
, struct comedi_subdevice
*s
)
345 int insn_inval(struct comedi_device
*dev
, struct comedi_subdevice
*s
,
346 struct comedi_insn
*insn
, unsigned int *data
)
351 static int insn_rw_emulate_bits(struct comedi_device
*dev
,
352 struct comedi_subdevice
*s
,
353 struct comedi_insn
*insn
, unsigned int *data
)
355 struct comedi_insn new_insn
;
357 static const unsigned channels_per_bitfield
= 32;
359 unsigned chan
= CR_CHAN(insn
->chanspec
);
360 const unsigned base_bitfield_channel
=
361 (chan
< channels_per_bitfield
) ? 0 : chan
;
362 unsigned int new_data
[2];
363 memset(new_data
, 0, sizeof(new_data
));
364 memset(&new_insn
, 0, sizeof(new_insn
));
365 new_insn
.insn
= INSN_BITS
;
366 new_insn
.chanspec
= base_bitfield_channel
;
368 new_insn
.data
= new_data
;
369 new_insn
.subdev
= insn
->subdev
;
371 if (insn
->insn
== INSN_WRITE
) {
372 if (!(s
->subdev_flags
& SDF_WRITABLE
))
374 new_data
[0] = 1 << (chan
- base_bitfield_channel
); /* mask */
375 new_data
[1] = data
[0] ? (1 << (chan
- base_bitfield_channel
)) : 0; /* bits */
378 ret
= s
->insn_bits(dev
, s
, &new_insn
, new_data
);
382 if (insn
->insn
== INSN_READ
)
383 data
[0] = (new_data
[1] >> (chan
- base_bitfield_channel
)) & 1;
388 static inline unsigned long uvirt_to_kva(pgd_t
*pgd
, unsigned long adr
)
390 unsigned long ret
= 0UL;
395 if (!pgd_none(*pgd
)) {
396 pud
= pud_offset(pgd
, adr
);
397 pmd
= pmd_offset(pud
, adr
);
398 if (!pmd_none(*pmd
)) {
399 ptep
= pte_offset_kernel(pmd
, adr
);
401 if (pte_present(pte
)) {
402 ret
= (unsigned long)
403 page_address(pte_page(pte
));
404 ret
|= (adr
& (PAGE_SIZE
- 1));
411 static inline unsigned long kvirt_to_kva(unsigned long adr
)
413 unsigned long va
, kva
;
416 kva
= uvirt_to_kva(pgd_offset_k(va
), va
);
421 int comedi_buf_alloc(struct comedi_device
*dev
, struct comedi_subdevice
*s
,
422 unsigned long new_size
)
424 struct comedi_async
*async
= s
->async
;
426 /* Round up new_size to multiple of PAGE_SIZE */
427 new_size
= (new_size
+ PAGE_SIZE
- 1) & PAGE_MASK
;
429 /* if no change is required, do nothing */
430 if (async
->prealloc_buf
&& async
->prealloc_bufsz
== new_size
)
433 /* deallocate old buffer */
434 if (async
->prealloc_buf
) {
435 vunmap(async
->prealloc_buf
);
436 async
->prealloc_buf
= NULL
;
437 async
->prealloc_bufsz
= 0;
439 if (async
->buf_page_list
) {
441 for (i
= 0; i
< async
->n_buf_pages
; ++i
) {
442 if (async
->buf_page_list
[i
].virt_addr
) {
443 mem_map_unreserve(virt_to_page
444 (async
->buf_page_list
[i
].
446 if (s
->async_dma_dir
!= DMA_NONE
) {
447 dma_free_coherent(dev
->hw_dev
,
456 free_page((unsigned long)
457 async
->buf_page_list
[i
].
462 vfree(async
->buf_page_list
);
463 async
->buf_page_list
= NULL
;
464 async
->n_buf_pages
= 0;
466 /* allocate new buffer */
469 unsigned n_pages
= new_size
>> PAGE_SHIFT
;
470 struct page
**pages
= NULL
;
472 async
->buf_page_list
=
473 vmalloc(sizeof(struct comedi_buf_page
) * n_pages
);
474 if (async
->buf_page_list
) {
475 memset(async
->buf_page_list
, 0,
476 sizeof(struct comedi_buf_page
) * n_pages
);
477 pages
= vmalloc(sizeof(struct page
*) * n_pages
);
480 for (i
= 0; i
< n_pages
; i
++) {
481 if (s
->async_dma_dir
!= DMA_NONE
) {
482 async
->buf_page_list
[i
].virt_addr
=
483 dma_alloc_coherent(dev
->hw_dev
,
491 async
->buf_page_list
[i
].virt_addr
=
493 get_zeroed_page(GFP_KERNEL
);
495 if (async
->buf_page_list
[i
].virt_addr
== NULL
)
498 mem_map_reserve(virt_to_page
499 (async
->buf_page_list
[i
].
503 buf_page_list
[i
].virt_addr
);
507 async
->prealloc_buf
=
508 vmap(pages
, n_pages
, VM_MAP
, PAGE_KERNEL_NOCACHE
);
512 if (async
->prealloc_buf
== NULL
) {
513 /* Some allocation failed above. */
514 if (async
->buf_page_list
) {
515 for (i
= 0; i
< n_pages
; i
++) {
516 if (async
->buf_page_list
[i
].virt_addr
==
520 mem_map_unreserve(virt_to_page
521 (async
->buf_page_list
523 if (s
->async_dma_dir
!= DMA_NONE
) {
524 dma_free_coherent(dev
->hw_dev
,
533 free_page((unsigned long)
538 vfree(async
->buf_page_list
);
539 async
->buf_page_list
= NULL
;
543 async
->n_buf_pages
= n_pages
;
545 async
->prealloc_bufsz
= new_size
;
550 /* munging is applied to data by core as it passes between user
551 * and kernel space */
552 unsigned int comedi_buf_munge(struct comedi_async
*async
,
553 unsigned int num_bytes
)
555 struct comedi_subdevice
*s
= async
->subdevice
;
556 unsigned int count
= 0;
557 const unsigned num_sample_bytes
= bytes_per_sample(s
);
559 if (s
->munge
== NULL
|| (async
->cmd
.flags
& CMDF_RAWDATA
)) {
560 async
->munge_count
+= num_bytes
;
561 BUG_ON((int)(async
->munge_count
- async
->buf_write_count
) > 0);
564 /* don't munge partial samples */
565 num_bytes
-= num_bytes
% num_sample_bytes
;
566 while (count
< num_bytes
) {
569 block_size
= num_bytes
- count
;
570 if (block_size
< 0) {
571 printk("%s: %s: bug! block_size is negative\n",
575 if ((int)(async
->munge_ptr
+ block_size
-
576 async
->prealloc_bufsz
) > 0)
577 block_size
= async
->prealloc_bufsz
- async
->munge_ptr
;
579 s
->munge(s
->device
, s
, async
->prealloc_buf
+ async
->munge_ptr
,
580 block_size
, async
->munge_chan
);
582 smp_wmb(); /* barrier insures data is munged in buffer before munge_count is incremented */
584 async
->munge_chan
+= block_size
/ num_sample_bytes
;
585 async
->munge_chan
%= async
->cmd
.chanlist_len
;
586 async
->munge_count
+= block_size
;
587 async
->munge_ptr
+= block_size
;
588 async
->munge_ptr
%= async
->prealloc_bufsz
;
591 BUG_ON((int)(async
->munge_count
- async
->buf_write_count
) > 0);
595 unsigned int comedi_buf_write_n_available(struct comedi_async
*async
)
597 unsigned int free_end
;
603 free_end
= async
->buf_read_count
+ async
->prealloc_bufsz
;
604 nbytes
= free_end
- async
->buf_write_alloc_count
;
605 nbytes
-= nbytes
% bytes_per_sample(async
->subdevice
);
606 /* barrier insures the read of buf_read_count in this
607 query occurs before any following writes to the buffer which
608 might be based on the return value from this query.
614 /* allocates chunk for the writer from free buffer space */
615 unsigned int comedi_buf_write_alloc(struct comedi_async
*async
,
618 unsigned int free_end
= async
->buf_read_count
+ async
->prealloc_bufsz
;
620 if ((int)(async
->buf_write_alloc_count
+ nbytes
- free_end
) > 0)
621 nbytes
= free_end
- async
->buf_write_alloc_count
;
623 async
->buf_write_alloc_count
+= nbytes
;
624 /* barrier insures the read of buf_read_count above occurs before
625 we write data to the write-alloc'ed buffer space */
630 /* allocates nothing unless it can completely fulfill the request */
631 unsigned int comedi_buf_write_alloc_strict(struct comedi_async
*async
,
634 unsigned int free_end
= async
->buf_read_count
+ async
->prealloc_bufsz
;
636 if ((int)(async
->buf_write_alloc_count
+ nbytes
- free_end
) > 0)
639 async
->buf_write_alloc_count
+= nbytes
;
640 /* barrier insures the read of buf_read_count above occurs before
641 we write data to the write-alloc'ed buffer space */
646 /* transfers a chunk from writer to filled buffer space */
647 unsigned comedi_buf_write_free(struct comedi_async
*async
, unsigned int nbytes
)
649 if ((int)(async
->buf_write_count
+ nbytes
-
650 async
->buf_write_alloc_count
) > 0) {
652 ("comedi: attempted to write-free more bytes than have been write-allocated.\n");
653 nbytes
= async
->buf_write_alloc_count
- async
->buf_write_count
;
655 async
->buf_write_count
+= nbytes
;
656 async
->buf_write_ptr
+= nbytes
;
657 comedi_buf_munge(async
, async
->buf_write_count
- async
->munge_count
);
658 if (async
->buf_write_ptr
>= async
->prealloc_bufsz
)
659 async
->buf_write_ptr
%= async
->prealloc_bufsz
;
664 /* allocates a chunk for the reader from filled (and munged) buffer space */
665 unsigned comedi_buf_read_alloc(struct comedi_async
*async
, unsigned nbytes
)
667 if ((int)(async
->buf_read_alloc_count
+ nbytes
- async
->munge_count
) >
669 nbytes
= async
->munge_count
- async
->buf_read_alloc_count
;
671 async
->buf_read_alloc_count
+= nbytes
;
672 /* barrier insures read of munge_count occurs before we actually read
673 data out of buffer */
678 /* transfers control of a chunk from reader to free buffer space */
679 unsigned comedi_buf_read_free(struct comedi_async
*async
, unsigned int nbytes
)
681 /* barrier insures data has been read out of buffer before read count is incremented */
683 if ((int)(async
->buf_read_count
+ nbytes
-
684 async
->buf_read_alloc_count
) > 0) {
686 ("comedi: attempted to read-free more bytes than have been read-allocated.\n");
687 nbytes
= async
->buf_read_alloc_count
- async
->buf_read_count
;
689 async
->buf_read_count
+= nbytes
;
690 async
->buf_read_ptr
+= nbytes
;
691 async
->buf_read_ptr
%= async
->prealloc_bufsz
;
695 void comedi_buf_memcpy_to(struct comedi_async
*async
, unsigned int offset
,
696 const void *data
, unsigned int num_bytes
)
698 unsigned int write_ptr
= async
->buf_write_ptr
+ offset
;
700 if (write_ptr
>= async
->prealloc_bufsz
)
701 write_ptr
%= async
->prealloc_bufsz
;
704 unsigned int block_size
;
706 if (write_ptr
+ num_bytes
> async
->prealloc_bufsz
)
707 block_size
= async
->prealloc_bufsz
- write_ptr
;
709 block_size
= num_bytes
;
711 memcpy(async
->prealloc_buf
+ write_ptr
, data
, block_size
);
714 num_bytes
-= block_size
;
720 void comedi_buf_memcpy_from(struct comedi_async
*async
, unsigned int offset
,
721 void *dest
, unsigned int nbytes
)
724 unsigned int read_ptr
= async
->buf_read_ptr
+ offset
;
726 if (read_ptr
>= async
->prealloc_bufsz
)
727 read_ptr
%= async
->prealloc_bufsz
;
730 unsigned int block_size
;
732 src
= async
->prealloc_buf
+ read_ptr
;
734 if (nbytes
>= async
->prealloc_bufsz
- read_ptr
)
735 block_size
= async
->prealloc_bufsz
- read_ptr
;
739 memcpy(dest
, src
, block_size
);
740 nbytes
-= block_size
;
746 unsigned int comedi_buf_read_n_available(struct comedi_async
*async
)
752 num_bytes
= async
->munge_count
- async
->buf_read_count
;
753 /* barrier insures the read of munge_count in this
754 query occurs before any following reads of the buffer which
755 might be based on the return value from this query.
761 int comedi_buf_get(struct comedi_async
*async
, short *x
)
763 unsigned int n
= comedi_buf_read_n_available(async
);
765 if (n
< sizeof(short))
767 comedi_buf_read_alloc(async
, sizeof(short));
768 *x
= *(short *)(async
->prealloc_buf
+ async
->buf_read_ptr
);
769 comedi_buf_read_free(async
, sizeof(short));
773 int comedi_buf_put(struct comedi_async
*async
, short x
)
775 unsigned int n
= comedi_buf_write_alloc_strict(async
, sizeof(short));
777 if (n
< sizeof(short)) {
778 async
->events
|= COMEDI_CB_ERROR
;
781 *(short *)(async
->prealloc_buf
+ async
->buf_write_ptr
) = x
;
782 comedi_buf_write_free(async
, sizeof(short));
786 void comedi_reset_async_buf(struct comedi_async
*async
)
788 async
->buf_write_alloc_count
= 0;
789 async
->buf_write_count
= 0;
790 async
->buf_read_alloc_count
= 0;
791 async
->buf_read_count
= 0;
793 async
->buf_write_ptr
= 0;
794 async
->buf_read_ptr
= 0;
797 async
->scan_progress
= 0;
798 async
->munge_chan
= 0;
799 async
->munge_count
= 0;
800 async
->munge_ptr
= 0;
805 int comedi_auto_config(struct device
*hardware_device
, const char *board_name
,
806 const int *options
, unsigned num_options
)
808 struct comedi_devconfig it
;
810 struct comedi_device_file_info
*dev_file_info
;
812 unsigned *private_data
= NULL
;
814 if (!comedi_autoconfig
) {
815 dev_set_drvdata(hardware_device
, NULL
);
819 minor
= comedi_alloc_board_minor(hardware_device
);
823 private_data
= kmalloc(sizeof(unsigned), GFP_KERNEL
);
824 if (private_data
== NULL
) {
828 *private_data
= minor
;
829 dev_set_drvdata(hardware_device
, private_data
);
831 dev_file_info
= comedi_get_device_file_info(minor
);
833 memset(&it
, 0, sizeof(it
));
834 strncpy(it
.board_name
, board_name
, COMEDI_NAMELEN
);
835 it
.board_name
[COMEDI_NAMELEN
- 1] = '\0';
836 BUG_ON(num_options
> COMEDI_NDEVCONFOPTS
);
837 memcpy(it
.options
, options
, num_options
* sizeof(int));
839 mutex_lock(&dev_file_info
->device
->mutex
);
840 retval
= comedi_device_attach(dev_file_info
->device
, &it
);
841 mutex_unlock(&dev_file_info
->device
->mutex
);
846 comedi_free_board_minor(minor
);
851 void comedi_auto_unconfig(struct device
*hardware_device
)
853 unsigned *minor
= (unsigned *)dev_get_drvdata(hardware_device
);
857 BUG_ON(*minor
>= COMEDI_NUM_BOARD_MINORS
);
859 comedi_free_board_minor(*minor
);
860 dev_set_drvdata(hardware_device
, NULL
);
864 int comedi_pci_auto_config(struct pci_dev
*pcidev
, const char *board_name
)
869 options
[0] = pcidev
->bus
->number
;
871 options
[1] = PCI_SLOT(pcidev
->devfn
);
873 return comedi_auto_config(&pcidev
->dev
, board_name
,
874 options
, ARRAY_SIZE(options
));
877 void comedi_pci_auto_unconfig(struct pci_dev
*pcidev
)
879 comedi_auto_unconfig(&pcidev
->dev
);
882 int comedi_usb_auto_config(struct usb_device
*usbdev
, const char *board_name
)
884 BUG_ON(usbdev
== NULL
);
885 return comedi_auto_config(&usbdev
->dev
, board_name
, NULL
, 0);
888 void comedi_usb_auto_unconfig(struct usb_device
*usbdev
)
890 BUG_ON(usbdev
== NULL
);
891 comedi_auto_unconfig(&usbdev
->dev
);