Commit | Line | Data |
---|---|---|
3cf840f6 DS |
1 | /* |
2 | comedi/drivers/comedi_bond.c | |
3 | A Comedi driver to 'bond' or merge multiple drivers and devices as one. | |
4 | ||
5 | COMEDI - Linux Control and Measurement Device Interface | |
6 | Copyright (C) 2000 David A. Schleef <ds@schleef.org> | |
7 | Copyright (C) 2005 Calin A. Culianu <calin@ajvar.org> | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | ||
23 | */ | |
24 | /* | |
25 | Driver: comedi_bond | |
e7f2aa34 GKH |
26 | Description: A driver to 'bond' (merge) multiple subdevices from multiple |
27 | devices together as one. | |
3cf840f6 DS |
28 | Devices: |
29 | Author: ds | |
30 | Updated: Mon, 10 Oct 00:18:25 -0500 | |
31 | Status: works | |
32 | ||
33 | This driver allows you to 'bond' (merge) multiple comedi subdevices | |
34 | (coming from possibly difference boards and/or drivers) together. For | |
35 | example, if you had a board with 2 different DIO subdevices, and | |
36 | another with 1 DIO subdevice, you could 'bond' them with this driver | |
37 | so that they look like one big fat DIO subdevice. This makes writing | |
38 | applications slightly easier as you don't have to worry about managing | |
39 | different subdevices in the application -- you just worry about | |
40 | indexing one linear array of channel id's. | |
41 | ||
42 | Right now only DIO subdevices are supported as that's the personal itch | |
43 | I am scratching with this driver. If you want to add support for AI and AO | |
44 | subdevs, go right on ahead and do so! | |
45 | ||
46 | Commands aren't supported -- although it would be cool if they were. | |
47 | ||
48 | Configuration Options: | |
49 | List of comedi-minors to bond. All subdevices of the same type | |
50 | within each minor will be concatenated together in the order given here. | |
51 | */ | |
52 | ||
3b6b25b5 GKH |
53 | #include <linux/string.h> |
54 | #include <linux/slab.h> | |
e2a0eab0 | 55 | #include "../comedi.h" |
3cf840f6 DS |
56 | #include "../comedilib.h" |
57 | #include "../comedidev.h" | |
3cf840f6 DS |
58 | |
59 | /* The maxiumum number of channels per subdevice. */ | |
60 | #define MAX_CHANS 256 | |
61 | ||
62 | #define MODULE_NAME "comedi_bond" | |
3cf840f6 | 63 | MODULE_LICENSE("GPL"); |
3cf840f6 DS |
64 | #ifndef STR |
65 | # define STR1(x) #x | |
66 | # define STR(x) STR1(x) | |
67 | #endif | |
68 | ||
246c5418 | 69 | static int debug; |
3cf840f6 | 70 | module_param(debug, int, 0644); |
e7f2aa34 GKH |
71 | MODULE_PARM_DESC(debug, "If true, print extra cryptic debugging output useful" |
72 | "only to developers."); | |
3cf840f6 DS |
73 | |
74 | #define LOG_MSG(x...) printk(KERN_INFO MODULE_NAME": "x) | |
e7f2aa34 GKH |
75 | #define DEBUG(x...) \ |
76 | do { \ | |
77 | if (debug) \ | |
78 | printk(KERN_DEBUG MODULE_NAME": DEBUG: "x); \ | |
79 | } while (0) | |
3cf840f6 DS |
80 | #define WARNING(x...) printk(KERN_WARNING MODULE_NAME ": WARNING: "x) |
81 | #define ERROR(x...) printk(KERN_ERR MODULE_NAME ": INTERNAL ERROR: "x) | |
82 | MODULE_AUTHOR("Calin A. Culianu"); | |
e7f2aa34 GKH |
83 | MODULE_DESCRIPTION(MODULE_NAME "A driver for COMEDI to bond multiple COMEDI " |
84 | "devices together as one. In the words of John Lennon: " | |
85 | "'And the world will live as one...'"); | |
3cf840f6 DS |
86 | |
87 | /* | |
88 | * Board descriptions for two imaginary boards. Describing the | |
89 | * boards in this way is optional, and completely driver-dependent. | |
90 | * Some drivers use arrays such as this, other do not. | |
91 | */ | |
92 | struct BondingBoard { | |
93 | const char *name; | |
94 | }; | |
3cf840f6 | 95 | |
ff534766 | 96 | static const struct BondingBoard bondingBoards[] = { |
3cf840f6 | 97 | { |
0a85b6f0 MT |
98 | .name = MODULE_NAME, |
99 | }, | |
3cf840f6 DS |
100 | }; |
101 | ||
102 | /* | |
103 | * Useful for shorthand access to the particular board structure | |
104 | */ | |
ff534766 | 105 | #define thisboard ((const struct BondingBoard *)dev->board_ptr) |
3cf840f6 DS |
106 | |
107 | struct BondedDevice { | |
472dfe77 | 108 | struct comedi_device *dev; |
3cf840f6 DS |
109 | unsigned minor; |
110 | unsigned subdev; | |
111 | unsigned subdev_type; | |
112 | unsigned nchans; | |
e7f2aa34 GKH |
113 | unsigned chanid_offset; /* The offset into our unified linear |
114 | channel-id's of chanid 0 on this | |
115 | subdevice. */ | |
3cf840f6 | 116 | }; |
3cf840f6 DS |
117 | |
118 | /* this structure is for data unique to this hardware driver. If | |
119 | several hardware drivers keep similar information in this structure, | |
71b5f4f1 | 120 | feel free to suggest moving the variable to the struct comedi_device struct. */ |
3cf840f6 DS |
121 | struct Private { |
122 | # define MAX_BOARD_NAME 256 | |
123 | char name[MAX_BOARD_NAME]; | |
124 | struct BondedDevice **devs; | |
125 | unsigned ndevs; | |
126 | struct BondedDevice *chanIdDevMap[MAX_CHANS]; | |
127 | unsigned nchans; | |
128 | }; | |
3cf840f6 DS |
129 | |
130 | /* | |
131 | * most drivers define the following macro to make it easy to | |
132 | * access the private structure. | |
133 | */ | |
ff534766 | 134 | #define devpriv ((struct Private *)dev->private) |
3cf840f6 DS |
135 | |
136 | /* | |
139dfbdf | 137 | * The struct comedi_driver structure tells the Comedi core module |
3cf840f6 DS |
138 | * which functions to call to configure/deconfigure (attach/detach) |
139 | * the board, and also about the kernel module that contains | |
140 | * the device code. | |
141 | */ | |
0a85b6f0 MT |
142 | static int bonding_attach(struct comedi_device *dev, |
143 | struct comedi_devconfig *it); | |
71b5f4f1 | 144 | static int bonding_detach(struct comedi_device *dev); |
3cf840f6 | 145 | /** Build Private array of all devices.. */ |
0707bb04 | 146 | static int doDevConfig(struct comedi_device *dev, struct comedi_devconfig *it); |
71b5f4f1 | 147 | static void doDevUnconfig(struct comedi_device *dev); |
e7f2aa34 GKH |
148 | /* Ugly implementation of realloc that always copies memory around -- I'm lazy, |
149 | * what can I say? I like to do wasteful memcopies.. :) */ | |
3cf840f6 DS |
150 | static void *Realloc(const void *ptr, size_t len, size_t old_len); |
151 | ||
139dfbdf | 152 | static struct comedi_driver driver_bonding = { |
0a85b6f0 MT |
153 | .driver_name = MODULE_NAME, |
154 | .module = THIS_MODULE, | |
155 | .attach = bonding_attach, | |
156 | .detach = bonding_detach, | |
3cf840f6 DS |
157 | /* It is not necessary to implement the following members if you are |
158 | * writing a driver for a ISA PnP or PCI card */ | |
159 | /* Most drivers will support multiple types of boards by | |
160 | * having an array of board structures. These were defined | |
161 | * in skel_boards[] above. Note that the element 'name' | |
162 | * was first in the structure -- Comedi uses this fact to | |
163 | * extract the name of the board without knowing any details | |
164 | * about the structure except for its length. | |
165 | * When a device is attached (by comedi_config), the name | |
166 | * of the device is given to Comedi, and Comedi tries to | |
167 | * match it by going through the list of board names. If | |
168 | * there is a match, the address of the pointer is put | |
169 | * into dev->board_ptr and driver->attach() is called. | |
170 | * | |
171 | * Note that these are not necessary if you can determine | |
172 | * the type of board in software. ISA PnP, PCI, and PCMCIA | |
173 | * devices are such boards. | |
174 | */ | |
0a85b6f0 MT |
175 | .board_name = &bondingBoards[0].name, |
176 | .offset = sizeof(struct BondingBoard), | |
177 | .num_names = ARRAY_SIZE(bondingBoards), | |
3cf840f6 DS |
178 | }; |
179 | ||
0a85b6f0 MT |
180 | static int bonding_dio_insn_bits(struct comedi_device *dev, |
181 | struct comedi_subdevice *s, | |
90035c08 | 182 | struct comedi_insn *insn, unsigned int *data); |
0a85b6f0 MT |
183 | static int bonding_dio_insn_config(struct comedi_device *dev, |
184 | struct comedi_subdevice *s, | |
185 | struct comedi_insn *insn, | |
186 | unsigned int *data); | |
3cf840f6 DS |
187 | |
188 | /* | |
189 | * Attach is called by the Comedi core to configure the driver | |
190 | * for a particular board. If you specified a board_name array | |
191 | * in the driver structure, dev->board_ptr contains that | |
192 | * address. | |
193 | */ | |
0a85b6f0 MT |
194 | static int bonding_attach(struct comedi_device *dev, |
195 | struct comedi_devconfig *it) | |
3cf840f6 | 196 | { |
34c43922 | 197 | struct comedi_subdevice *s; |
3cf840f6 DS |
198 | |
199 | LOG_MSG("comedi%d\n", dev->minor); | |
200 | ||
e7f2aa34 GKH |
201 | /* |
202 | * Allocate the private structure area. alloc_private() is a | |
203 | * convenient macro defined in comedidev.h. | |
204 | */ | |
ff534766 | 205 | if (alloc_private(dev, sizeof(struct Private)) < 0) |
3cf840f6 DS |
206 | return -ENOMEM; |
207 | ||
e7f2aa34 GKH |
208 | /* |
209 | * Setup our bonding from config params.. sets up our Private struct.. | |
210 | */ | |
3cf840f6 DS |
211 | if (!doDevConfig(dev, it)) |
212 | return -EINVAL; | |
213 | ||
e7f2aa34 GKH |
214 | /* |
215 | * Initialize dev->board_name. Note that we can use the "thisboard" | |
216 | * macro now, since we just initialized it in the last line. | |
217 | */ | |
3cf840f6 DS |
218 | dev->board_name = devpriv->name; |
219 | ||
e7f2aa34 GKH |
220 | /* |
221 | * Allocate the subdevice structures. alloc_subdevice() is a | |
222 | * convenient macro defined in comedidev.h. | |
223 | */ | |
3cf840f6 DS |
224 | if (alloc_subdevices(dev, 1) < 0) |
225 | return -ENOMEM; | |
226 | ||
227 | s = dev->subdevices + 0; | |
228 | s->type = COMEDI_SUBD_DIO; | |
229 | s->subdev_flags = SDF_READABLE | SDF_WRITABLE; | |
230 | s->n_chan = devpriv->nchans; | |
231 | s->maxdata = 1; | |
232 | s->range_table = &range_digital; | |
233 | s->insn_bits = bonding_dio_insn_bits; | |
234 | s->insn_config = bonding_dio_insn_config; | |
235 | ||
e7f2aa34 GKH |
236 | LOG_MSG("attached with %u DIO channels coming from %u different " |
237 | "subdevices all bonded together. " | |
238 | "John Lennon would be proud!\n", | |
239 | devpriv->nchans, devpriv->ndevs); | |
3cf840f6 DS |
240 | |
241 | return 1; | |
242 | } | |
243 | ||
244 | /* | |
245 | * _detach is called to deconfigure a device. It should deallocate | |
246 | * resources. | |
247 | * This function is also called when _attach() fails, so it should be | |
248 | * careful not to release resources that were not necessarily | |
249 | * allocated by _attach(). dev->private and dev->subdevices are | |
250 | * deallocated automatically by the core. | |
251 | */ | |
71b5f4f1 | 252 | static int bonding_detach(struct comedi_device *dev) |
3cf840f6 DS |
253 | { |
254 | LOG_MSG("comedi%d: remove\n", dev->minor); | |
255 | doDevUnconfig(dev); | |
256 | return 0; | |
257 | } | |
258 | ||
259 | /* DIO devices are slightly special. Although it is possible to | |
260 | * implement the insn_read/insn_write interface, it is much more | |
261 | * useful to applications if you implement the insn_bits interface. | |
262 | * This allows packed reading/writing of the DIO channels. The | |
263 | * comedi core can convert between insn_bits and insn_read/write */ | |
0a85b6f0 MT |
264 | static int bonding_dio_insn_bits(struct comedi_device *dev, |
265 | struct comedi_subdevice *s, | |
90035c08 | 266 | struct comedi_insn *insn, unsigned int *data) |
3cf840f6 | 267 | { |
790c5541 | 268 | #define LSAMPL_BITS (sizeof(unsigned int)*8) |
3cf840f6 DS |
269 | unsigned nchans = LSAMPL_BITS, num_done = 0, i; |
270 | if (insn->n != 2) | |
271 | return -EINVAL; | |
272 | ||
273 | if (devpriv->nchans < nchans) | |
274 | nchans = devpriv->nchans; | |
275 | ||
276 | /* The insn data is a mask in data[0] and the new data | |
277 | * in data[1], each channel cooresponding to a bit. */ | |
278 | for (i = 0; num_done < nchans && i < devpriv->ndevs; ++i) { | |
ff534766 | 279 | struct BondedDevice *bdev = devpriv->devs[i]; |
3cf840f6 DS |
280 | /* Grab the channel mask and data of only the bits corresponding |
281 | to this subdevice.. need to shift them to zero position of | |
282 | course. */ | |
e7f2aa34 | 283 | /* Bits corresponding to this subdev. */ |
790c5541 BP |
284 | unsigned int subdevMask = ((1 << bdev->nchans) - 1); |
285 | unsigned int writeMask, dataBits; | |
3cf840f6 DS |
286 | |
287 | /* Argh, we have >= LSAMPL_BITS chans.. take all bits */ | |
288 | if (bdev->nchans >= LSAMPL_BITS) | |
0a85b6f0 | 289 | subdevMask = (unsigned int)(-1); |
3cf840f6 DS |
290 | |
291 | writeMask = (data[0] >> num_done) & subdevMask; | |
292 | dataBits = (data[1] >> num_done) & subdevMask; | |
293 | ||
294 | /* Read/Write the new digital lines */ | |
295 | if (comedi_dio_bitfield(bdev->dev, bdev->subdev, writeMask, | |
0a85b6f0 | 296 | &dataBits) != 2) |
3cf840f6 DS |
297 | return -EINVAL; |
298 | ||
299 | /* Make room for the new bits in data[1], the return value */ | |
300 | data[1] &= ~(subdevMask << num_done); | |
301 | /* Put the bits in the return value */ | |
302 | data[1] |= (dataBits & subdevMask) << num_done; | |
303 | /* Save the new bits to the saved state.. */ | |
304 | s->state = data[1]; | |
305 | ||
306 | num_done += bdev->nchans; | |
307 | } | |
308 | ||
309 | return insn->n; | |
310 | } | |
311 | ||
0a85b6f0 MT |
312 | static int bonding_dio_insn_config(struct comedi_device *dev, |
313 | struct comedi_subdevice *s, | |
90035c08 | 314 | struct comedi_insn *insn, unsigned int *data) |
3cf840f6 DS |
315 | { |
316 | int chan = CR_CHAN(insn->chanspec), ret, io_bits = s->io_bits; | |
317 | unsigned int io; | |
ff534766 | 318 | struct BondedDevice *bdev; |
3cf840f6 DS |
319 | |
320 | if (chan < 0 || chan >= devpriv->nchans) | |
321 | return -EINVAL; | |
322 | bdev = devpriv->chanIdDevMap[chan]; | |
323 | ||
324 | /* The input or output configuration of each digital line is | |
325 | * configured by a special insn_config instruction. chanspec | |
326 | * contains the channel to be changed, and data[0] contains the | |
327 | * value COMEDI_INPUT or COMEDI_OUTPUT. */ | |
328 | switch (data[0]) { | |
329 | case INSN_CONFIG_DIO_OUTPUT: | |
330 | io = COMEDI_OUTPUT; /* is this really necessary? */ | |
331 | io_bits |= 1 << chan; | |
332 | break; | |
333 | case INSN_CONFIG_DIO_INPUT: | |
334 | io = COMEDI_INPUT; /* is this really necessary? */ | |
335 | io_bits &= ~(1 << chan); | |
336 | break; | |
337 | case INSN_CONFIG_DIO_QUERY: | |
338 | data[1] = | |
0a85b6f0 | 339 | (io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT; |
3cf840f6 DS |
340 | return insn->n; |
341 | break; | |
342 | default: | |
343 | return -EINVAL; | |
344 | break; | |
345 | } | |
e7f2aa34 GKH |
346 | /* 'real' channel id for this subdev.. */ |
347 | chan -= bdev->chanid_offset; | |
3cf840f6 DS |
348 | ret = comedi_dio_config(bdev->dev, bdev->subdev, chan, io); |
349 | if (ret != 1) | |
350 | return -EINVAL; | |
351 | /* Finally, save the new io_bits values since we didn't get | |
352 | an error above. */ | |
353 | s->io_bits = io_bits; | |
354 | return insn->n; | |
355 | } | |
356 | ||
357 | static void *Realloc(const void *oldmem, size_t newlen, size_t oldlen) | |
358 | { | |
3cf840f6 | 359 | void *newmem = kmalloc(newlen, GFP_KERNEL); |
e7f2aa34 | 360 | |
3cf840f6 | 361 | if (newmem && oldmem) |
e7f2aa34 GKH |
362 | memcpy(newmem, oldmem, min(oldlen, newlen)); |
363 | kfree(oldmem); | |
3cf840f6 DS |
364 | return newmem; |
365 | } | |
366 | ||
0707bb04 | 367 | static int doDevConfig(struct comedi_device *dev, struct comedi_devconfig *it) |
3cf840f6 DS |
368 | { |
369 | int i; | |
472dfe77 | 370 | struct comedi_device *devs_opened[COMEDI_NUM_BOARD_MINORS]; |
3cf840f6 DS |
371 | |
372 | memset(devs_opened, 0, sizeof(devs_opened)); | |
373 | devpriv->name[0] = 0;; | |
374 | /* Loop through all comedi devices specified on the command-line, | |
375 | building our device list */ | |
376 | for (i = 0; i < COMEDI_NDEVCONFOPTS && (!i || it->options[i]); ++i) { | |
377 | char file[] = "/dev/comediXXXXXX"; | |
378 | int minor = it->options[i]; | |
472dfe77 | 379 | struct comedi_device *d; |
3cf840f6 | 380 | int sdev = -1, nchans, tmp; |
246c5418 | 381 | struct BondedDevice *bdev = NULL; |
3cf840f6 | 382 | |
5d3aed74 | 383 | if (minor < 0 || minor >= COMEDI_NUM_BOARD_MINORS) { |
3cf840f6 DS |
384 | ERROR("Minor %d is invalid!\n", minor); |
385 | return 0; | |
386 | } | |
387 | if (minor == dev->minor) { | |
388 | ERROR("Cannot bond this driver to itself!\n"); | |
389 | return 0; | |
390 | } | |
391 | if (devs_opened[minor]) { | |
392 | ERROR("Minor %d specified more than once!\n", minor); | |
393 | return 0; | |
394 | } | |
395 | ||
396 | snprintf(file, sizeof(file), "/dev/comedi%u", minor); | |
397 | file[sizeof(file) - 1] = 0; | |
398 | ||
399 | d = devs_opened[minor] = comedi_open(file); | |
400 | ||
401 | if (!d) { | |
402 | ERROR("Minor %u could not be opened\n", minor); | |
403 | return 0; | |
404 | } | |
405 | ||
406 | /* Do DIO, as that's all we support now.. */ | |
407 | while ((sdev = comedi_find_subdevice_by_type(d, COMEDI_SUBD_DIO, | |
0a85b6f0 | 408 | sdev + 1)) > -1) { |
e7f2aa34 GKH |
409 | nchans = comedi_get_n_channels(d, sdev); |
410 | if (nchans <= 0) { | |
411 | ERROR("comedi_get_n_channels() returned %d " | |
412 | "on minor %u subdev %d!\n", | |
413 | nchans, minor, sdev); | |
3cf840f6 DS |
414 | return 0; |
415 | } | |
416 | bdev = kmalloc(sizeof(*bdev), GFP_KERNEL); | |
417 | if (!bdev) { | |
418 | ERROR("Out of memory.\n"); | |
419 | return 0; | |
420 | } | |
421 | bdev->dev = d; | |
422 | bdev->minor = minor; | |
423 | bdev->subdev = sdev; | |
424 | bdev->subdev_type = COMEDI_SUBD_DIO; | |
425 | bdev->nchans = nchans; | |
426 | bdev->chanid_offset = devpriv->nchans; | |
427 | ||
428 | /* map channel id's to BondedDevice * pointer.. */ | |
429 | while (nchans--) | |
430 | devpriv->chanIdDevMap[devpriv->nchans++] = bdev; | |
431 | ||
e7f2aa34 GKH |
432 | /* Now put bdev pointer at end of devpriv->devs array |
433 | * list.. */ | |
3cf840f6 DS |
434 | |
435 | /* ergh.. ugly.. we need to realloc :( */ | |
436 | tmp = devpriv->ndevs * sizeof(bdev); | |
437 | devpriv->devs = | |
0a85b6f0 MT |
438 | Realloc(devpriv->devs, |
439 | ++devpriv->ndevs * sizeof(bdev), tmp); | |
3cf840f6 | 440 | if (!devpriv->devs) { |
e7f2aa34 GKH |
441 | ERROR("Could not allocate memory. " |
442 | "Out of memory?"); | |
3cf840f6 DS |
443 | return 0; |
444 | } | |
445 | ||
446 | devpriv->devs[devpriv->ndevs - 1] = bdev; | |
447 | { | |
448 | /** Append dev:subdev to devpriv->name */ | |
449 | char buf[20]; | |
450 | int left = | |
0a85b6f0 | 451 | MAX_BOARD_NAME - strlen(devpriv->name) - 1; |
3cf840f6 | 452 | snprintf(buf, sizeof(buf), "%d:%d ", dev->minor, |
0a85b6f0 | 453 | bdev->subdev); |
3cf840f6 DS |
454 | buf[sizeof(buf) - 1] = 0; |
455 | strncat(devpriv->name, buf, left); | |
456 | } | |
457 | ||
458 | } | |
459 | } | |
460 | ||
461 | if (!devpriv->nchans) { | |
462 | ERROR("No channels found!\n"); | |
463 | return 0; | |
464 | } | |
465 | ||
466 | return 1; | |
467 | } | |
468 | ||
71b5f4f1 | 469 | static void doDevUnconfig(struct comedi_device *dev) |
3cf840f6 DS |
470 | { |
471 | unsigned long devs_closed = 0; | |
472 | ||
473 | if (devpriv) { | |
474 | while (devpriv->ndevs-- && devpriv->devs) { | |
ff534766 GKH |
475 | struct BondedDevice *bdev; |
476 | ||
477 | bdev = devpriv->devs[devpriv->ndevs]; | |
3cf840f6 DS |
478 | if (!bdev) |
479 | continue; | |
480 | if (!(devs_closed & (0x1 << bdev->minor))) { | |
481 | comedi_close(bdev->dev); | |
482 | devs_closed |= (0x1 << bdev->minor); | |
483 | } | |
484 | kfree(bdev); | |
485 | } | |
e7f2aa34 | 486 | kfree(devpriv->devs); |
246c5418 | 487 | devpriv->devs = NULL; |
3cf840f6 | 488 | kfree(devpriv); |
246c5418 | 489 | dev->private = NULL; |
3cf840f6 DS |
490 | } |
491 | } | |
492 | ||
246c5418 | 493 | static int __init init(void) |
3cf840f6 DS |
494 | { |
495 | return comedi_driver_register(&driver_bonding); | |
496 | } | |
497 | ||
246c5418 | 498 | static void __exit cleanup(void) |
3cf840f6 DS |
499 | { |
500 | comedi_driver_unregister(&driver_bonding); | |
501 | } | |
502 | ||
503 | module_init(init); | |
504 | module_exit(cleanup); |