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 | ||
53 | /* | |
54 | * The previous block comment is used to automatically generate | |
55 | * documentation in Comedi and Comedilib. The fields: | |
56 | * | |
57 | * Driver: the name of the driver | |
58 | * Description: a short phrase describing the driver. Don't list boards. | |
59 | * Devices: a full list of the boards that attempt to be supported by | |
60 | * the driver. Format is "(manufacturer) board name [comedi name]", | |
61 | * where comedi_name is the name that is used to configure the board. | |
139dfbdf | 62 | * See the comment near board_name: in the struct comedi_driver structure |
3cf840f6 DS |
63 | * below. If (manufacturer) or [comedi name] is missing, the previous |
64 | * value is used. | |
65 | * Author: you | |
66 | * Updated: date when the _documentation_ was last updated. Use 'date -R' | |
67 | * to get a value for this. | |
68 | * Status: a one-word description of the status. Valid values are: | |
69 | * works - driver works correctly on most boards supported, and | |
70 | * passes comedi_test. | |
71 | * unknown - unknown. Usually put there by ds. | |
72 | * experimental - may not work in any particular release. Author | |
73 | * probably wants assistance testing it. | |
74 | * bitrotten - driver has not been update in a long time, probably | |
75 | * doesn't work, and probably is missing support for significant | |
76 | * Comedi interface features. | |
77 | * untested - author probably wrote it "blind", and is believed to | |
78 | * work, but no confirmation. | |
79 | * | |
80 | * These headers should be followed by a blank line, and any comments | |
81 | * you wish to say about the driver. The comment area is the place | |
82 | * to put any known bugs, limitations, unsupported features, supported | |
83 | * command triggers, whether or not commands are supported on particular | |
84 | * subdevices, etc. | |
85 | * | |
86 | * Somewhere in the comment should be information about configuration | |
87 | * options that are used with comedi_config. | |
88 | */ | |
89 | ||
90 | #include "../comedilib.h" | |
91 | #include "../comedidev.h" | |
92 | #include <linux/string.h> | |
5a0e3ad6 | 93 | #include <linux/slab.h> |
3cf840f6 DS |
94 | |
95 | /* The maxiumum number of channels per subdevice. */ | |
96 | #define MAX_CHANS 256 | |
97 | ||
98 | #define MODULE_NAME "comedi_bond" | |
3cf840f6 | 99 | MODULE_LICENSE("GPL"); |
3cf840f6 DS |
100 | #ifndef STR |
101 | # define STR1(x) #x | |
102 | # define STR(x) STR1(x) | |
103 | #endif | |
104 | ||
246c5418 | 105 | static int debug; |
3cf840f6 | 106 | module_param(debug, int, 0644); |
e7f2aa34 GKH |
107 | MODULE_PARM_DESC(debug, "If true, print extra cryptic debugging output useful" |
108 | "only to developers."); | |
3cf840f6 DS |
109 | |
110 | #define LOG_MSG(x...) printk(KERN_INFO MODULE_NAME": "x) | |
e7f2aa34 GKH |
111 | #define DEBUG(x...) \ |
112 | do { \ | |
113 | if (debug) \ | |
114 | printk(KERN_DEBUG MODULE_NAME": DEBUG: "x); \ | |
115 | } while (0) | |
3cf840f6 DS |
116 | #define WARNING(x...) printk(KERN_WARNING MODULE_NAME ": WARNING: "x) |
117 | #define ERROR(x...) printk(KERN_ERR MODULE_NAME ": INTERNAL ERROR: "x) | |
118 | MODULE_AUTHOR("Calin A. Culianu"); | |
e7f2aa34 GKH |
119 | MODULE_DESCRIPTION(MODULE_NAME "A driver for COMEDI to bond multiple COMEDI " |
120 | "devices together as one. In the words of John Lennon: " | |
121 | "'And the world will live as one...'"); | |
3cf840f6 DS |
122 | |
123 | /* | |
124 | * Board descriptions for two imaginary boards. Describing the | |
125 | * boards in this way is optional, and completely driver-dependent. | |
126 | * Some drivers use arrays such as this, other do not. | |
127 | */ | |
128 | struct BondingBoard { | |
129 | const char *name; | |
130 | }; | |
3cf840f6 | 131 | |
ff534766 | 132 | static const struct BondingBoard bondingBoards[] = { |
3cf840f6 | 133 | { |
0a85b6f0 MT |
134 | .name = MODULE_NAME, |
135 | }, | |
3cf840f6 DS |
136 | }; |
137 | ||
138 | /* | |
139 | * Useful for shorthand access to the particular board structure | |
140 | */ | |
ff534766 | 141 | #define thisboard ((const struct BondingBoard *)dev->board_ptr) |
3cf840f6 DS |
142 | |
143 | struct BondedDevice { | |
0b3fb27f | 144 | void *dev; |
3cf840f6 DS |
145 | unsigned minor; |
146 | unsigned subdev; | |
147 | unsigned subdev_type; | |
148 | unsigned nchans; | |
e7f2aa34 GKH |
149 | unsigned chanid_offset; /* The offset into our unified linear |
150 | channel-id's of chanid 0 on this | |
151 | subdevice. */ | |
3cf840f6 | 152 | }; |
3cf840f6 DS |
153 | |
154 | /* this structure is for data unique to this hardware driver. If | |
155 | several hardware drivers keep similar information in this structure, | |
71b5f4f1 | 156 | feel free to suggest moving the variable to the struct comedi_device struct. */ |
3cf840f6 DS |
157 | struct Private { |
158 | # define MAX_BOARD_NAME 256 | |
159 | char name[MAX_BOARD_NAME]; | |
160 | struct BondedDevice **devs; | |
161 | unsigned ndevs; | |
162 | struct BondedDevice *chanIdDevMap[MAX_CHANS]; | |
163 | unsigned nchans; | |
164 | }; | |
3cf840f6 DS |
165 | |
166 | /* | |
167 | * most drivers define the following macro to make it easy to | |
168 | * access the private structure. | |
169 | */ | |
ff534766 | 170 | #define devpriv ((struct Private *)dev->private) |
3cf840f6 DS |
171 | |
172 | /* | |
139dfbdf | 173 | * The struct comedi_driver structure tells the Comedi core module |
3cf840f6 DS |
174 | * which functions to call to configure/deconfigure (attach/detach) |
175 | * the board, and also about the kernel module that contains | |
176 | * the device code. | |
177 | */ | |
0a85b6f0 MT |
178 | static int bonding_attach(struct comedi_device *dev, |
179 | struct comedi_devconfig *it); | |
71b5f4f1 | 180 | static int bonding_detach(struct comedi_device *dev); |
3cf840f6 | 181 | /** Build Private array of all devices.. */ |
0707bb04 | 182 | static int doDevConfig(struct comedi_device *dev, struct comedi_devconfig *it); |
71b5f4f1 | 183 | static void doDevUnconfig(struct comedi_device *dev); |
e7f2aa34 GKH |
184 | /* Ugly implementation of realloc that always copies memory around -- I'm lazy, |
185 | * what can I say? I like to do wasteful memcopies.. :) */ | |
3cf840f6 DS |
186 | static void *Realloc(const void *ptr, size_t len, size_t old_len); |
187 | ||
139dfbdf | 188 | static struct comedi_driver driver_bonding = { |
0a85b6f0 MT |
189 | .driver_name = MODULE_NAME, |
190 | .module = THIS_MODULE, | |
191 | .attach = bonding_attach, | |
192 | .detach = bonding_detach, | |
3cf840f6 DS |
193 | /* It is not necessary to implement the following members if you are |
194 | * writing a driver for a ISA PnP or PCI card */ | |
195 | /* Most drivers will support multiple types of boards by | |
196 | * having an array of board structures. These were defined | |
197 | * in skel_boards[] above. Note that the element 'name' | |
198 | * was first in the structure -- Comedi uses this fact to | |
199 | * extract the name of the board without knowing any details | |
200 | * about the structure except for its length. | |
201 | * When a device is attached (by comedi_config), the name | |
202 | * of the device is given to Comedi, and Comedi tries to | |
203 | * match it by going through the list of board names. If | |
204 | * there is a match, the address of the pointer is put | |
205 | * into dev->board_ptr and driver->attach() is called. | |
206 | * | |
207 | * Note that these are not necessary if you can determine | |
208 | * the type of board in software. ISA PnP, PCI, and PCMCIA | |
209 | * devices are such boards. | |
210 | */ | |
0a85b6f0 MT |
211 | .board_name = &bondingBoards[0].name, |
212 | .offset = sizeof(struct BondingBoard), | |
213 | .num_names = ARRAY_SIZE(bondingBoards), | |
3cf840f6 DS |
214 | }; |
215 | ||
0a85b6f0 MT |
216 | static int bonding_dio_insn_bits(struct comedi_device *dev, |
217 | struct comedi_subdevice *s, | |
90035c08 | 218 | struct comedi_insn *insn, unsigned int *data); |
0a85b6f0 MT |
219 | static int bonding_dio_insn_config(struct comedi_device *dev, |
220 | struct comedi_subdevice *s, | |
221 | struct comedi_insn *insn, | |
222 | unsigned int *data); | |
3cf840f6 DS |
223 | |
224 | /* | |
225 | * Attach is called by the Comedi core to configure the driver | |
226 | * for a particular board. If you specified a board_name array | |
227 | * in the driver structure, dev->board_ptr contains that | |
228 | * address. | |
229 | */ | |
0a85b6f0 MT |
230 | static int bonding_attach(struct comedi_device *dev, |
231 | struct comedi_devconfig *it) | |
3cf840f6 | 232 | { |
34c43922 | 233 | struct comedi_subdevice *s; |
3cf840f6 DS |
234 | |
235 | LOG_MSG("comedi%d\n", dev->minor); | |
236 | ||
e7f2aa34 GKH |
237 | /* |
238 | * Allocate the private structure area. alloc_private() is a | |
239 | * convenient macro defined in comedidev.h. | |
240 | */ | |
ff534766 | 241 | if (alloc_private(dev, sizeof(struct Private)) < 0) |
3cf840f6 DS |
242 | return -ENOMEM; |
243 | ||
e7f2aa34 GKH |
244 | /* |
245 | * Setup our bonding from config params.. sets up our Private struct.. | |
246 | */ | |
3cf840f6 DS |
247 | if (!doDevConfig(dev, it)) |
248 | return -EINVAL; | |
249 | ||
e7f2aa34 GKH |
250 | /* |
251 | * Initialize dev->board_name. Note that we can use the "thisboard" | |
252 | * macro now, since we just initialized it in the last line. | |
253 | */ | |
3cf840f6 DS |
254 | dev->board_name = devpriv->name; |
255 | ||
e7f2aa34 GKH |
256 | /* |
257 | * Allocate the subdevice structures. alloc_subdevice() is a | |
258 | * convenient macro defined in comedidev.h. | |
259 | */ | |
3cf840f6 DS |
260 | if (alloc_subdevices(dev, 1) < 0) |
261 | return -ENOMEM; | |
262 | ||
263 | s = dev->subdevices + 0; | |
264 | s->type = COMEDI_SUBD_DIO; | |
265 | s->subdev_flags = SDF_READABLE | SDF_WRITABLE; | |
266 | s->n_chan = devpriv->nchans; | |
267 | s->maxdata = 1; | |
268 | s->range_table = &range_digital; | |
269 | s->insn_bits = bonding_dio_insn_bits; | |
270 | s->insn_config = bonding_dio_insn_config; | |
271 | ||
e7f2aa34 GKH |
272 | LOG_MSG("attached with %u DIO channels coming from %u different " |
273 | "subdevices all bonded together. " | |
274 | "John Lennon would be proud!\n", | |
275 | devpriv->nchans, devpriv->ndevs); | |
3cf840f6 DS |
276 | |
277 | return 1; | |
278 | } | |
279 | ||
280 | /* | |
281 | * _detach is called to deconfigure a device. It should deallocate | |
282 | * resources. | |
283 | * This function is also called when _attach() fails, so it should be | |
284 | * careful not to release resources that were not necessarily | |
285 | * allocated by _attach(). dev->private and dev->subdevices are | |
286 | * deallocated automatically by the core. | |
287 | */ | |
71b5f4f1 | 288 | static int bonding_detach(struct comedi_device *dev) |
3cf840f6 DS |
289 | { |
290 | LOG_MSG("comedi%d: remove\n", dev->minor); | |
291 | doDevUnconfig(dev); | |
292 | return 0; | |
293 | } | |
294 | ||
295 | /* DIO devices are slightly special. Although it is possible to | |
296 | * implement the insn_read/insn_write interface, it is much more | |
297 | * useful to applications if you implement the insn_bits interface. | |
298 | * This allows packed reading/writing of the DIO channels. The | |
299 | * comedi core can convert between insn_bits and insn_read/write */ | |
0a85b6f0 MT |
300 | static int bonding_dio_insn_bits(struct comedi_device *dev, |
301 | struct comedi_subdevice *s, | |
90035c08 | 302 | struct comedi_insn *insn, unsigned int *data) |
3cf840f6 | 303 | { |
790c5541 | 304 | #define LSAMPL_BITS (sizeof(unsigned int)*8) |
3cf840f6 DS |
305 | unsigned nchans = LSAMPL_BITS, num_done = 0, i; |
306 | if (insn->n != 2) | |
307 | return -EINVAL; | |
308 | ||
309 | if (devpriv->nchans < nchans) | |
310 | nchans = devpriv->nchans; | |
311 | ||
312 | /* The insn data is a mask in data[0] and the new data | |
313 | * in data[1], each channel cooresponding to a bit. */ | |
314 | for (i = 0; num_done < nchans && i < devpriv->ndevs; ++i) { | |
ff534766 | 315 | struct BondedDevice *bdev = devpriv->devs[i]; |
3cf840f6 DS |
316 | /* Grab the channel mask and data of only the bits corresponding |
317 | to this subdevice.. need to shift them to zero position of | |
318 | course. */ | |
e7f2aa34 | 319 | /* Bits corresponding to this subdev. */ |
790c5541 BP |
320 | unsigned int subdevMask = ((1 << bdev->nchans) - 1); |
321 | unsigned int writeMask, dataBits; | |
3cf840f6 DS |
322 | |
323 | /* Argh, we have >= LSAMPL_BITS chans.. take all bits */ | |
324 | if (bdev->nchans >= LSAMPL_BITS) | |
0a85b6f0 | 325 | subdevMask = (unsigned int)(-1); |
3cf840f6 DS |
326 | |
327 | writeMask = (data[0] >> num_done) & subdevMask; | |
328 | dataBits = (data[1] >> num_done) & subdevMask; | |
329 | ||
330 | /* Read/Write the new digital lines */ | |
331 | if (comedi_dio_bitfield(bdev->dev, bdev->subdev, writeMask, | |
0a85b6f0 | 332 | &dataBits) != 2) |
3cf840f6 DS |
333 | return -EINVAL; |
334 | ||
335 | /* Make room for the new bits in data[1], the return value */ | |
336 | data[1] &= ~(subdevMask << num_done); | |
337 | /* Put the bits in the return value */ | |
338 | data[1] |= (dataBits & subdevMask) << num_done; | |
339 | /* Save the new bits to the saved state.. */ | |
340 | s->state = data[1]; | |
341 | ||
342 | num_done += bdev->nchans; | |
343 | } | |
344 | ||
345 | return insn->n; | |
346 | } | |
347 | ||
0a85b6f0 MT |
348 | static int bonding_dio_insn_config(struct comedi_device *dev, |
349 | struct comedi_subdevice *s, | |
90035c08 | 350 | struct comedi_insn *insn, unsigned int *data) |
3cf840f6 DS |
351 | { |
352 | int chan = CR_CHAN(insn->chanspec), ret, io_bits = s->io_bits; | |
353 | unsigned int io; | |
ff534766 | 354 | struct BondedDevice *bdev; |
3cf840f6 DS |
355 | |
356 | if (chan < 0 || chan >= devpriv->nchans) | |
357 | return -EINVAL; | |
358 | bdev = devpriv->chanIdDevMap[chan]; | |
359 | ||
360 | /* The input or output configuration of each digital line is | |
361 | * configured by a special insn_config instruction. chanspec | |
362 | * contains the channel to be changed, and data[0] contains the | |
363 | * value COMEDI_INPUT or COMEDI_OUTPUT. */ | |
364 | switch (data[0]) { | |
365 | case INSN_CONFIG_DIO_OUTPUT: | |
366 | io = COMEDI_OUTPUT; /* is this really necessary? */ | |
367 | io_bits |= 1 << chan; | |
368 | break; | |
369 | case INSN_CONFIG_DIO_INPUT: | |
370 | io = COMEDI_INPUT; /* is this really necessary? */ | |
371 | io_bits &= ~(1 << chan); | |
372 | break; | |
373 | case INSN_CONFIG_DIO_QUERY: | |
374 | data[1] = | |
0a85b6f0 | 375 | (io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT; |
3cf840f6 DS |
376 | return insn->n; |
377 | break; | |
378 | default: | |
379 | return -EINVAL; | |
380 | break; | |
381 | } | |
e7f2aa34 GKH |
382 | /* 'real' channel id for this subdev.. */ |
383 | chan -= bdev->chanid_offset; | |
3cf840f6 DS |
384 | ret = comedi_dio_config(bdev->dev, bdev->subdev, chan, io); |
385 | if (ret != 1) | |
386 | return -EINVAL; | |
387 | /* Finally, save the new io_bits values since we didn't get | |
388 | an error above. */ | |
389 | s->io_bits = io_bits; | |
390 | return insn->n; | |
391 | } | |
392 | ||
393 | static void *Realloc(const void *oldmem, size_t newlen, size_t oldlen) | |
394 | { | |
3cf840f6 | 395 | void *newmem = kmalloc(newlen, GFP_KERNEL); |
e7f2aa34 | 396 | |
3cf840f6 | 397 | if (newmem && oldmem) |
e7f2aa34 GKH |
398 | memcpy(newmem, oldmem, min(oldlen, newlen)); |
399 | kfree(oldmem); | |
3cf840f6 DS |
400 | return newmem; |
401 | } | |
402 | ||
0707bb04 | 403 | static int doDevConfig(struct comedi_device *dev, struct comedi_devconfig *it) |
3cf840f6 DS |
404 | { |
405 | int i; | |
0b3fb27f | 406 | void *devs_opened[COMEDI_NUM_BOARD_MINORS]; |
3cf840f6 DS |
407 | |
408 | memset(devs_opened, 0, sizeof(devs_opened)); | |
409 | devpriv->name[0] = 0;; | |
410 | /* Loop through all comedi devices specified on the command-line, | |
411 | building our device list */ | |
412 | for (i = 0; i < COMEDI_NDEVCONFOPTS && (!i || it->options[i]); ++i) { | |
413 | char file[] = "/dev/comediXXXXXX"; | |
414 | int minor = it->options[i]; | |
0b3fb27f | 415 | void *d; |
3cf840f6 | 416 | int sdev = -1, nchans, tmp; |
246c5418 | 417 | struct BondedDevice *bdev = NULL; |
3cf840f6 | 418 | |
5d3aed74 | 419 | if (minor < 0 || minor >= COMEDI_NUM_BOARD_MINORS) { |
3cf840f6 DS |
420 | ERROR("Minor %d is invalid!\n", minor); |
421 | return 0; | |
422 | } | |
423 | if (minor == dev->minor) { | |
424 | ERROR("Cannot bond this driver to itself!\n"); | |
425 | return 0; | |
426 | } | |
427 | if (devs_opened[minor]) { | |
428 | ERROR("Minor %d specified more than once!\n", minor); | |
429 | return 0; | |
430 | } | |
431 | ||
432 | snprintf(file, sizeof(file), "/dev/comedi%u", minor); | |
433 | file[sizeof(file) - 1] = 0; | |
434 | ||
435 | d = devs_opened[minor] = comedi_open(file); | |
436 | ||
437 | if (!d) { | |
438 | ERROR("Minor %u could not be opened\n", minor); | |
439 | return 0; | |
440 | } | |
441 | ||
442 | /* Do DIO, as that's all we support now.. */ | |
443 | while ((sdev = comedi_find_subdevice_by_type(d, COMEDI_SUBD_DIO, | |
0a85b6f0 | 444 | sdev + 1)) > -1) { |
e7f2aa34 GKH |
445 | nchans = comedi_get_n_channels(d, sdev); |
446 | if (nchans <= 0) { | |
447 | ERROR("comedi_get_n_channels() returned %d " | |
448 | "on minor %u subdev %d!\n", | |
449 | nchans, minor, sdev); | |
3cf840f6 DS |
450 | return 0; |
451 | } | |
452 | bdev = kmalloc(sizeof(*bdev), GFP_KERNEL); | |
453 | if (!bdev) { | |
454 | ERROR("Out of memory.\n"); | |
455 | return 0; | |
456 | } | |
457 | bdev->dev = d; | |
458 | bdev->minor = minor; | |
459 | bdev->subdev = sdev; | |
460 | bdev->subdev_type = COMEDI_SUBD_DIO; | |
461 | bdev->nchans = nchans; | |
462 | bdev->chanid_offset = devpriv->nchans; | |
463 | ||
464 | /* map channel id's to BondedDevice * pointer.. */ | |
465 | while (nchans--) | |
466 | devpriv->chanIdDevMap[devpriv->nchans++] = bdev; | |
467 | ||
e7f2aa34 GKH |
468 | /* Now put bdev pointer at end of devpriv->devs array |
469 | * list.. */ | |
3cf840f6 DS |
470 | |
471 | /* ergh.. ugly.. we need to realloc :( */ | |
472 | tmp = devpriv->ndevs * sizeof(bdev); | |
473 | devpriv->devs = | |
0a85b6f0 MT |
474 | Realloc(devpriv->devs, |
475 | ++devpriv->ndevs * sizeof(bdev), tmp); | |
3cf840f6 | 476 | if (!devpriv->devs) { |
e7f2aa34 GKH |
477 | ERROR("Could not allocate memory. " |
478 | "Out of memory?"); | |
3cf840f6 DS |
479 | return 0; |
480 | } | |
481 | ||
482 | devpriv->devs[devpriv->ndevs - 1] = bdev; | |
483 | { | |
484 | /** Append dev:subdev to devpriv->name */ | |
485 | char buf[20]; | |
486 | int left = | |
0a85b6f0 | 487 | MAX_BOARD_NAME - strlen(devpriv->name) - 1; |
3cf840f6 | 488 | snprintf(buf, sizeof(buf), "%d:%d ", dev->minor, |
0a85b6f0 | 489 | bdev->subdev); |
3cf840f6 DS |
490 | buf[sizeof(buf) - 1] = 0; |
491 | strncat(devpriv->name, buf, left); | |
492 | } | |
493 | ||
494 | } | |
495 | } | |
496 | ||
497 | if (!devpriv->nchans) { | |
498 | ERROR("No channels found!\n"); | |
499 | return 0; | |
500 | } | |
501 | ||
502 | return 1; | |
503 | } | |
504 | ||
71b5f4f1 | 505 | static void doDevUnconfig(struct comedi_device *dev) |
3cf840f6 DS |
506 | { |
507 | unsigned long devs_closed = 0; | |
508 | ||
509 | if (devpriv) { | |
510 | while (devpriv->ndevs-- && devpriv->devs) { | |
ff534766 GKH |
511 | struct BondedDevice *bdev; |
512 | ||
513 | bdev = devpriv->devs[devpriv->ndevs]; | |
3cf840f6 DS |
514 | if (!bdev) |
515 | continue; | |
516 | if (!(devs_closed & (0x1 << bdev->minor))) { | |
517 | comedi_close(bdev->dev); | |
518 | devs_closed |= (0x1 << bdev->minor); | |
519 | } | |
520 | kfree(bdev); | |
521 | } | |
e7f2aa34 | 522 | kfree(devpriv->devs); |
246c5418 | 523 | devpriv->devs = NULL; |
3cf840f6 | 524 | kfree(devpriv); |
246c5418 | 525 | dev->private = NULL; |
3cf840f6 DS |
526 | } |
527 | } | |
528 | ||
246c5418 | 529 | static int __init init(void) |
3cf840f6 DS |
530 | { |
531 | return comedi_driver_register(&driver_bonding); | |
532 | } | |
533 | ||
246c5418 | 534 | static void __exit cleanup(void) |
3cf840f6 DS |
535 | { |
536 | comedi_driver_unregister(&driver_bonding); | |
537 | } | |
538 | ||
539 | module_init(init); | |
540 | module_exit(cleanup); |