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02bec490 TB |
1 | /* -*- linux-c -*- * |
2 | * | |
3 | * ALSA driver for the digigram lx6464es interface | |
4 | * | |
5 | * Copyright (c) 2008, 2009 Tim Blechmann <tim@klingt.org> | |
6 | * | |
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; see the file COPYING. If not, write to | |
20 | * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | * Boston, MA 02111-1307, USA. | |
22 | * | |
23 | */ | |
24 | ||
25 | #include <linux/module.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/pci.h> | |
28 | #include <linux/delay.h> | |
29 | ||
30 | #include <sound/initval.h> | |
31 | #include <sound/control.h> | |
32 | #include <sound/info.h> | |
33 | ||
34 | #include "lx6464es.h" | |
35 | ||
36 | MODULE_AUTHOR("Tim Blechmann"); | |
37 | MODULE_LICENSE("GPL"); | |
38 | MODULE_DESCRIPTION("digigram lx6464es"); | |
39 | MODULE_SUPPORTED_DEVICE("{digigram lx6464es{}}"); | |
40 | ||
41 | ||
42 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; | |
43 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; | |
44 | static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; | |
45 | ||
de0525ca TB |
46 | module_param_array(index, int, NULL, 0444); |
47 | MODULE_PARM_DESC(index, "Index value for Digigram LX6464ES interface."); | |
48 | module_param_array(id, charp, NULL, 0444); | |
49 | MODULE_PARM_DESC(id, "ID string for Digigram LX6464ES interface."); | |
50 | module_param_array(enable, bool, NULL, 0444); | |
51 | MODULE_PARM_DESC(enable, "Enable/disable specific Digigram LX6464ES soundcards."); | |
52 | ||
02bec490 TB |
53 | static const char card_name[] = "LX6464ES"; |
54 | ||
55 | ||
56 | #define PCI_DEVICE_ID_PLX_LX6464ES PCI_DEVICE_ID_PLX_9056 | |
57 | ||
58 | static struct pci_device_id snd_lx6464es_ids[] = { | |
59 | { PCI_DEVICE(PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_LX6464ES), | |
60 | .subvendor = PCI_VENDOR_ID_DIGIGRAM, | |
61 | .subdevice = PCI_SUBDEVICE_ID_DIGIGRAM_LX6464ES_SERIAL_SUBSYSTEM | |
62 | }, /* LX6464ES */ | |
63 | { PCI_DEVICE(PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_LX6464ES), | |
64 | .subvendor = PCI_VENDOR_ID_DIGIGRAM, | |
65 | .subdevice = PCI_SUBDEVICE_ID_DIGIGRAM_LX6464ES_CAE_SERIAL_SUBSYSTEM | |
66 | }, /* LX6464ES-CAE */ | |
67 | { 0, }, | |
68 | }; | |
69 | ||
70 | MODULE_DEVICE_TABLE(pci, snd_lx6464es_ids); | |
71 | ||
72 | ||
73 | ||
74 | /* PGO pour USERo dans le registre pci_0x06/loc_0xEC */ | |
75 | #define CHIPSC_RESET_XILINX (1L<<16) | |
76 | ||
77 | ||
78 | /* alsa callbacks */ | |
79 | static struct snd_pcm_hardware lx_caps = { | |
80 | .info = (SNDRV_PCM_INFO_MMAP | | |
81 | SNDRV_PCM_INFO_INTERLEAVED | | |
82 | SNDRV_PCM_INFO_MMAP_VALID | | |
83 | SNDRV_PCM_INFO_SYNC_START), | |
84 | .formats = (SNDRV_PCM_FMTBIT_S16_LE | | |
85 | SNDRV_PCM_FMTBIT_S16_BE | | |
86 | SNDRV_PCM_FMTBIT_S24_3LE | | |
87 | SNDRV_PCM_FMTBIT_S24_3BE), | |
88 | .rates = (SNDRV_PCM_RATE_CONTINUOUS | | |
89 | SNDRV_PCM_RATE_8000_192000), | |
90 | .rate_min = 8000, | |
91 | .rate_max = 192000, | |
92 | .channels_min = 2, | |
93 | .channels_max = 64, | |
94 | .buffer_bytes_max = 64*2*3*MICROBLAZE_IBL_MAX*MAX_STREAM_BUFFER, | |
95 | .period_bytes_min = (2*2*MICROBLAZE_IBL_MIN*2), | |
96 | .period_bytes_max = (4*64*MICROBLAZE_IBL_MAX*MAX_STREAM_BUFFER), | |
97 | .periods_min = 2, | |
98 | .periods_max = MAX_STREAM_BUFFER, | |
99 | }; | |
100 | ||
101 | static int lx_set_granularity(struct lx6464es *chip, u32 gran); | |
102 | ||
103 | ||
104 | static int lx_hardware_open(struct lx6464es *chip, | |
105 | struct snd_pcm_substream *substream) | |
106 | { | |
107 | int err = 0; | |
108 | struct snd_pcm_runtime *runtime = substream->runtime; | |
109 | int channels = runtime->channels; | |
110 | int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE); | |
111 | ||
112 | snd_pcm_uframes_t period_size = runtime->period_size; | |
113 | ||
114 | snd_printd(LXP "allocating pipe for %d channels\n", channels); | |
115 | err = lx_pipe_allocate(chip, 0, is_capture, channels); | |
116 | if (err < 0) { | |
117 | snd_printk(KERN_ERR LXP "allocating pipe failed\n"); | |
118 | return err; | |
119 | } | |
120 | ||
121 | err = lx_set_granularity(chip, period_size); | |
122 | if (err < 0) { | |
123 | snd_printk(KERN_ERR LXP "setting granularity to %ld failed\n", | |
124 | period_size); | |
125 | return err; | |
126 | } | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
131 | static int lx_hardware_start(struct lx6464es *chip, | |
132 | struct snd_pcm_substream *substream) | |
133 | { | |
134 | int err = 0; | |
135 | struct snd_pcm_runtime *runtime = substream->runtime; | |
136 | int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE); | |
137 | ||
138 | snd_printd(LXP "setting stream format\n"); | |
139 | err = lx_stream_set_format(chip, runtime, 0, is_capture); | |
140 | if (err < 0) { | |
141 | snd_printk(KERN_ERR LXP "setting stream format failed\n"); | |
142 | return err; | |
143 | } | |
144 | ||
145 | snd_printd(LXP "starting pipe\n"); | |
146 | err = lx_pipe_start(chip, 0, is_capture); | |
147 | if (err < 0) { | |
148 | snd_printk(KERN_ERR LXP "starting pipe failed\n"); | |
149 | return err; | |
150 | } | |
151 | ||
152 | snd_printd(LXP "waiting for pipe to start\n"); | |
153 | err = lx_pipe_wait_for_start(chip, 0, is_capture); | |
154 | if (err < 0) { | |
155 | snd_printk(KERN_ERR LXP "waiting for pipe failed\n"); | |
156 | return err; | |
157 | } | |
158 | ||
159 | return err; | |
160 | } | |
161 | ||
162 | ||
163 | static int lx_hardware_stop(struct lx6464es *chip, | |
164 | struct snd_pcm_substream *substream) | |
165 | { | |
166 | int err = 0; | |
167 | int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE); | |
168 | ||
169 | snd_printd(LXP "pausing pipe\n"); | |
170 | err = lx_pipe_pause(chip, 0, is_capture); | |
171 | if (err < 0) { | |
172 | snd_printk(KERN_ERR LXP "pausing pipe failed\n"); | |
173 | return err; | |
174 | } | |
175 | ||
176 | snd_printd(LXP "waiting for pipe to become idle\n"); | |
177 | err = lx_pipe_wait_for_idle(chip, 0, is_capture); | |
178 | if (err < 0) { | |
179 | snd_printk(KERN_ERR LXP "waiting for pipe failed\n"); | |
180 | return err; | |
181 | } | |
182 | ||
183 | snd_printd(LXP "stopping pipe\n"); | |
184 | err = lx_pipe_stop(chip, 0, is_capture); | |
185 | if (err < 0) { | |
186 | snd_printk(LXP "stopping pipe failed\n"); | |
187 | return err; | |
188 | } | |
189 | ||
190 | return err; | |
191 | } | |
192 | ||
193 | ||
194 | static int lx_hardware_close(struct lx6464es *chip, | |
195 | struct snd_pcm_substream *substream) | |
196 | { | |
197 | int err = 0; | |
198 | int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE); | |
199 | ||
200 | snd_printd(LXP "releasing pipe\n"); | |
201 | err = lx_pipe_release(chip, 0, is_capture); | |
202 | if (err < 0) { | |
203 | snd_printk(LXP "releasing pipe failed\n"); | |
204 | return err; | |
205 | } | |
206 | ||
207 | return err; | |
208 | } | |
209 | ||
210 | ||
211 | static int lx_pcm_open(struct snd_pcm_substream *substream) | |
212 | { | |
213 | struct lx6464es *chip = snd_pcm_substream_chip(substream); | |
214 | struct snd_pcm_runtime *runtime = substream->runtime; | |
215 | int err = 0; | |
216 | int board_rate; | |
217 | ||
218 | snd_printdd("->lx_pcm_open\n"); | |
219 | mutex_lock(&chip->setup_mutex); | |
220 | ||
221 | /* copy the struct snd_pcm_hardware struct */ | |
222 | runtime->hw = lx_caps; | |
223 | ||
224 | #if 0 | |
225 | /* buffer-size should better be multiple of period-size */ | |
226 | err = snd_pcm_hw_constraint_integer(runtime, | |
227 | SNDRV_PCM_HW_PARAM_PERIODS); | |
228 | if (err < 0) { | |
229 | snd_printk(KERN_WARNING LXP "could not constrain periods\n"); | |
230 | goto exit; | |
231 | } | |
232 | #endif | |
233 | ||
234 | /* the clock rate cannot be changed */ | |
235 | board_rate = chip->board_sample_rate; | |
236 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, | |
237 | board_rate, board_rate); | |
238 | ||
239 | if (err < 0) { | |
240 | snd_printk(KERN_WARNING LXP "could not constrain periods\n"); | |
241 | goto exit; | |
242 | } | |
243 | ||
244 | /* constrain period size */ | |
245 | err = snd_pcm_hw_constraint_minmax(runtime, | |
246 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
247 | MICROBLAZE_IBL_MIN, | |
248 | MICROBLAZE_IBL_MAX); | |
249 | if (err < 0) { | |
250 | snd_printk(KERN_WARNING LXP | |
251 | "could not constrain period size\n"); | |
252 | goto exit; | |
253 | } | |
254 | ||
255 | snd_pcm_hw_constraint_step(runtime, 0, | |
256 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 32); | |
257 | ||
258 | snd_pcm_set_sync(substream); | |
259 | err = 0; | |
260 | ||
261 | exit: | |
262 | runtime->private_data = chip; | |
263 | ||
264 | mutex_unlock(&chip->setup_mutex); | |
265 | snd_printdd("<-lx_pcm_open, %d\n", err); | |
266 | return err; | |
267 | } | |
268 | ||
269 | static int lx_pcm_close(struct snd_pcm_substream *substream) | |
270 | { | |
271 | int err = 0; | |
272 | snd_printdd("->lx_pcm_close\n"); | |
273 | return err; | |
274 | } | |
275 | ||
276 | static snd_pcm_uframes_t lx_pcm_stream_pointer(struct snd_pcm_substream | |
277 | *substream) | |
278 | { | |
279 | struct lx6464es *chip = snd_pcm_substream_chip(substream); | |
280 | snd_pcm_uframes_t pos; | |
281 | unsigned long flags; | |
282 | int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE); | |
283 | ||
284 | struct lx_stream *lx_stream = is_capture ? &chip->capture_stream : | |
285 | &chip->playback_stream; | |
286 | ||
287 | snd_printdd("->lx_pcm_stream_pointer\n"); | |
288 | ||
289 | spin_lock_irqsave(&chip->lock, flags); | |
290 | pos = lx_stream->frame_pos * substream->runtime->period_size; | |
291 | spin_unlock_irqrestore(&chip->lock, flags); | |
292 | ||
293 | snd_printdd(LXP "stream_pointer at %ld\n", pos); | |
294 | return pos; | |
295 | } | |
296 | ||
297 | static int lx_pcm_prepare(struct snd_pcm_substream *substream) | |
298 | { | |
299 | struct lx6464es *chip = snd_pcm_substream_chip(substream); | |
300 | int err = 0; | |
301 | const int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE); | |
302 | ||
303 | snd_printdd("->lx_pcm_prepare\n"); | |
304 | ||
305 | mutex_lock(&chip->setup_mutex); | |
306 | ||
307 | if (chip->hardware_running[is_capture]) { | |
308 | err = lx_hardware_stop(chip, substream); | |
309 | if (err < 0) { | |
310 | snd_printk(KERN_ERR LXP "failed to stop hardware. " | |
311 | "Error code %d\n", err); | |
312 | goto exit; | |
313 | } | |
314 | ||
315 | err = lx_hardware_close(chip, substream); | |
316 | if (err < 0) { | |
317 | snd_printk(KERN_ERR LXP "failed to close hardware. " | |
318 | "Error code %d\n", err); | |
319 | goto exit; | |
320 | } | |
321 | } | |
322 | ||
323 | snd_printd(LXP "opening hardware\n"); | |
324 | err = lx_hardware_open(chip, substream); | |
325 | if (err < 0) { | |
326 | snd_printk(KERN_ERR LXP "failed to open hardware. " | |
327 | "Error code %d\n", err); | |
328 | goto exit; | |
329 | } | |
330 | ||
331 | err = lx_hardware_start(chip, substream); | |
332 | if (err < 0) { | |
333 | snd_printk(KERN_ERR LXP "failed to start hardware. " | |
334 | "Error code %d\n", err); | |
335 | goto exit; | |
336 | } | |
337 | ||
338 | chip->hardware_running[is_capture] = 1; | |
339 | ||
340 | if (chip->board_sample_rate != substream->runtime->rate) { | |
341 | if (!err) | |
342 | chip->board_sample_rate = substream->runtime->rate; | |
343 | } | |
344 | ||
345 | exit: | |
346 | mutex_unlock(&chip->setup_mutex); | |
347 | return err; | |
348 | } | |
349 | ||
350 | static int lx_pcm_hw_params(struct snd_pcm_substream *substream, | |
351 | struct snd_pcm_hw_params *hw_params, int is_capture) | |
352 | { | |
353 | struct lx6464es *chip = snd_pcm_substream_chip(substream); | |
354 | int err = 0; | |
355 | ||
356 | snd_printdd("->lx_pcm_hw_params\n"); | |
357 | ||
358 | mutex_lock(&chip->setup_mutex); | |
359 | ||
360 | /* set dma buffer */ | |
361 | err = snd_pcm_lib_malloc_pages(substream, | |
362 | params_buffer_bytes(hw_params)); | |
363 | ||
364 | if (is_capture) | |
365 | chip->capture_stream.stream = substream; | |
366 | else | |
367 | chip->playback_stream.stream = substream; | |
368 | ||
369 | mutex_unlock(&chip->setup_mutex); | |
370 | return err; | |
371 | } | |
372 | ||
373 | static int lx_pcm_hw_params_playback(struct snd_pcm_substream *substream, | |
374 | struct snd_pcm_hw_params *hw_params) | |
375 | { | |
376 | return lx_pcm_hw_params(substream, hw_params, 0); | |
377 | } | |
378 | ||
379 | static int lx_pcm_hw_params_capture(struct snd_pcm_substream *substream, | |
380 | struct snd_pcm_hw_params *hw_params) | |
381 | { | |
382 | return lx_pcm_hw_params(substream, hw_params, 1); | |
383 | } | |
384 | ||
385 | static int lx_pcm_hw_free(struct snd_pcm_substream *substream) | |
386 | { | |
387 | struct lx6464es *chip = snd_pcm_substream_chip(substream); | |
388 | int err = 0; | |
389 | int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE); | |
390 | ||
391 | snd_printdd("->lx_pcm_hw_free\n"); | |
392 | mutex_lock(&chip->setup_mutex); | |
393 | ||
394 | if (chip->hardware_running[is_capture]) { | |
395 | err = lx_hardware_stop(chip, substream); | |
396 | if (err < 0) { | |
397 | snd_printk(KERN_ERR LXP "failed to stop hardware. " | |
398 | "Error code %d\n", err); | |
399 | goto exit; | |
400 | } | |
401 | ||
402 | err = lx_hardware_close(chip, substream); | |
403 | if (err < 0) { | |
404 | snd_printk(KERN_ERR LXP "failed to close hardware. " | |
405 | "Error code %d\n", err); | |
406 | goto exit; | |
407 | } | |
408 | ||
409 | chip->hardware_running[is_capture] = 0; | |
410 | } | |
411 | ||
412 | err = snd_pcm_lib_free_pages(substream); | |
413 | ||
414 | if (is_capture) | |
415 | chip->capture_stream.stream = 0; | |
416 | else | |
417 | chip->playback_stream.stream = 0; | |
418 | ||
419 | exit: | |
420 | mutex_unlock(&chip->setup_mutex); | |
421 | return err; | |
422 | } | |
423 | ||
424 | static void lx_trigger_start(struct lx6464es *chip, struct lx_stream *lx_stream) | |
425 | { | |
426 | struct snd_pcm_substream *substream = lx_stream->stream; | |
427 | const int is_capture = lx_stream->is_capture; | |
428 | ||
429 | int err; | |
430 | ||
431 | const u32 channels = substream->runtime->channels; | |
432 | const u32 bytes_per_frame = channels * 3; | |
433 | const u32 period_size = substream->runtime->period_size; | |
434 | const u32 periods = substream->runtime->periods; | |
435 | const u32 period_bytes = period_size * bytes_per_frame; | |
436 | ||
437 | dma_addr_t buf = substream->dma_buffer.addr; | |
438 | int i; | |
439 | ||
440 | u32 needed, freed; | |
441 | u32 size_array[5]; | |
442 | ||
443 | for (i = 0; i != periods; ++i) { | |
444 | u32 buffer_index = 0; | |
445 | ||
446 | err = lx_buffer_ask(chip, 0, is_capture, &needed, &freed, | |
447 | size_array); | |
448 | snd_printdd(LXP "starting: needed %d, freed %d\n", | |
449 | needed, freed); | |
450 | ||
451 | err = lx_buffer_give(chip, 0, is_capture, period_bytes, | |
452 | lower_32_bits(buf), upper_32_bits(buf), | |
453 | &buffer_index); | |
454 | ||
455 | snd_printdd(LXP "starting: buffer index %x on %p (%d bytes)\n", | |
456 | buffer_index, (void *)buf, period_bytes); | |
457 | buf += period_bytes; | |
458 | } | |
459 | ||
460 | err = lx_buffer_ask(chip, 0, is_capture, &needed, &freed, size_array); | |
461 | snd_printdd(LXP "starting: needed %d, freed %d\n", needed, freed); | |
462 | ||
463 | snd_printd(LXP "starting: starting stream\n"); | |
464 | err = lx_stream_start(chip, 0, is_capture); | |
465 | if (err < 0) | |
466 | snd_printk(KERN_ERR LXP "couldn't start stream\n"); | |
467 | else | |
468 | lx_stream->status = LX_STREAM_STATUS_RUNNING; | |
469 | ||
470 | lx_stream->frame_pos = 0; | |
471 | } | |
472 | ||
473 | static void lx_trigger_stop(struct lx6464es *chip, struct lx_stream *lx_stream) | |
474 | { | |
475 | const int is_capture = lx_stream->is_capture; | |
476 | int err; | |
477 | ||
478 | snd_printd(LXP "stopping: stopping stream\n"); | |
479 | err = lx_stream_stop(chip, 0, is_capture); | |
480 | if (err < 0) | |
481 | snd_printk(KERN_ERR LXP "couldn't stop stream\n"); | |
482 | else | |
483 | lx_stream->status = LX_STREAM_STATUS_FREE; | |
484 | ||
485 | } | |
486 | ||
487 | static void lx_trigger_tasklet_dispatch_stream(struct lx6464es *chip, | |
488 | struct lx_stream *lx_stream) | |
489 | { | |
490 | switch (lx_stream->status) { | |
491 | case LX_STREAM_STATUS_SCHEDULE_RUN: | |
492 | lx_trigger_start(chip, lx_stream); | |
493 | break; | |
494 | ||
495 | case LX_STREAM_STATUS_SCHEDULE_STOP: | |
496 | lx_trigger_stop(chip, lx_stream); | |
497 | break; | |
498 | ||
499 | default: | |
500 | break; | |
501 | } | |
502 | } | |
503 | ||
504 | static void lx_trigger_tasklet(unsigned long data) | |
505 | { | |
506 | struct lx6464es *chip = (struct lx6464es *)data; | |
507 | unsigned long flags; | |
508 | ||
509 | snd_printdd("->lx_trigger_tasklet\n"); | |
510 | ||
511 | spin_lock_irqsave(&chip->lock, flags); | |
512 | lx_trigger_tasklet_dispatch_stream(chip, &chip->capture_stream); | |
513 | lx_trigger_tasklet_dispatch_stream(chip, &chip->playback_stream); | |
514 | spin_unlock_irqrestore(&chip->lock, flags); | |
515 | } | |
516 | ||
517 | static int lx_pcm_trigger_dispatch(struct lx6464es *chip, | |
518 | struct lx_stream *lx_stream, int cmd) | |
519 | { | |
520 | int err = 0; | |
521 | ||
522 | switch (cmd) { | |
523 | case SNDRV_PCM_TRIGGER_START: | |
524 | lx_stream->status = LX_STREAM_STATUS_SCHEDULE_RUN; | |
525 | break; | |
526 | ||
527 | case SNDRV_PCM_TRIGGER_STOP: | |
528 | lx_stream->status = LX_STREAM_STATUS_SCHEDULE_STOP; | |
529 | break; | |
530 | ||
531 | default: | |
532 | err = -EINVAL; | |
533 | goto exit; | |
534 | } | |
535 | tasklet_schedule(&chip->trigger_tasklet); | |
536 | ||
537 | exit: | |
538 | return err; | |
539 | } | |
540 | ||
541 | ||
542 | static int lx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) | |
543 | { | |
544 | struct lx6464es *chip = snd_pcm_substream_chip(substream); | |
545 | const int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE); | |
546 | struct lx_stream *stream = is_capture ? &chip->capture_stream : | |
547 | &chip->playback_stream; | |
548 | ||
549 | snd_printdd("->lx_pcm_trigger\n"); | |
550 | ||
551 | return lx_pcm_trigger_dispatch(chip, stream, cmd); | |
552 | } | |
553 | ||
554 | static int snd_lx6464es_free(struct lx6464es *chip) | |
555 | { | |
556 | snd_printdd("->snd_lx6464es_free\n"); | |
557 | ||
558 | lx_irq_disable(chip); | |
559 | ||
560 | if (chip->irq >= 0) | |
561 | free_irq(chip->irq, chip); | |
562 | ||
563 | iounmap(chip->port_dsp_bar); | |
564 | ioport_unmap(chip->port_plx_remapped); | |
565 | ||
566 | pci_release_regions(chip->pci); | |
567 | pci_disable_device(chip->pci); | |
568 | ||
569 | kfree(chip); | |
570 | ||
571 | return 0; | |
572 | } | |
573 | ||
574 | static int snd_lx6464es_dev_free(struct snd_device *device) | |
575 | { | |
576 | return snd_lx6464es_free(device->device_data); | |
577 | } | |
578 | ||
579 | /* reset the dsp during initialization */ | |
580 | static int __devinit lx_init_xilinx_reset(struct lx6464es *chip) | |
581 | { | |
582 | int i; | |
583 | u32 plx_reg = lx_plx_reg_read(chip, ePLX_CHIPSC); | |
584 | ||
585 | snd_printdd("->lx_init_xilinx_reset\n"); | |
586 | ||
587 | /* activate reset of xilinx */ | |
588 | plx_reg &= ~CHIPSC_RESET_XILINX; | |
589 | ||
590 | lx_plx_reg_write(chip, ePLX_CHIPSC, plx_reg); | |
591 | msleep(1); | |
592 | ||
593 | lx_plx_reg_write(chip, ePLX_MBOX3, 0); | |
594 | msleep(1); | |
595 | ||
596 | plx_reg |= CHIPSC_RESET_XILINX; | |
597 | lx_plx_reg_write(chip, ePLX_CHIPSC, plx_reg); | |
598 | ||
599 | /* deactivate reset of xilinx */ | |
600 | for (i = 0; i != 100; ++i) { | |
601 | u32 reg_mbox3; | |
602 | msleep(10); | |
603 | reg_mbox3 = lx_plx_reg_read(chip, ePLX_MBOX3); | |
604 | if (reg_mbox3) { | |
605 | snd_printd(LXP "xilinx reset done\n"); | |
606 | snd_printdd(LXP "xilinx took %d loops\n", i); | |
607 | break; | |
608 | } | |
609 | } | |
610 | ||
611 | /* todo: add some error handling? */ | |
612 | ||
613 | /* clear mr */ | |
614 | lx_dsp_reg_write(chip, eReg_CSM, 0); | |
615 | ||
616 | /* le xilinx ES peut ne pas etre encore pret, on attend. */ | |
617 | msleep(600); | |
618 | ||
619 | return 0; | |
620 | } | |
621 | ||
622 | static int __devinit lx_init_xilinx_test(struct lx6464es *chip) | |
623 | { | |
624 | u32 reg; | |
625 | ||
626 | snd_printdd("->lx_init_xilinx_test\n"); | |
627 | ||
628 | /* TEST if we have access to Xilinx/MicroBlaze */ | |
629 | lx_dsp_reg_write(chip, eReg_CSM, 0); | |
630 | ||
631 | reg = lx_dsp_reg_read(chip, eReg_CSM); | |
632 | ||
633 | if (reg) { | |
634 | snd_printk(KERN_ERR LXP "Problem: Reg_CSM %x.\n", reg); | |
635 | ||
636 | /* PCI9056_SPACE0_REMAP */ | |
637 | lx_plx_reg_write(chip, ePLX_PCICR, 1); | |
638 | ||
639 | reg = lx_dsp_reg_read(chip, eReg_CSM); | |
640 | if (reg) { | |
641 | snd_printk(KERN_ERR LXP "Error: Reg_CSM %x.\n", reg); | |
642 | return -EAGAIN; /* seems to be appropriate */ | |
643 | } | |
644 | } | |
645 | ||
646 | snd_printd(LXP "Xilinx/MicroBlaze access test successful\n"); | |
647 | ||
648 | return 0; | |
649 | } | |
650 | ||
651 | /* initialize ethersound */ | |
652 | static int __devinit lx_init_ethersound_config(struct lx6464es *chip) | |
653 | { | |
654 | int i; | |
655 | u32 orig_conf_es = lx_dsp_reg_read(chip, eReg_CONFES); | |
656 | ||
7e895cfa TB |
657 | /* configure 64 io channels */ |
658 | u32 conf_es = (orig_conf_es & CONFES_READ_PART_MASK) | | |
02bec490 | 659 | (64 << IOCR_INPUTS_OFFSET) | |
7e895cfa | 660 | (64 << IOCR_OUTPUTS_OFFSET) | |
02bec490 TB |
661 | (FREQ_RATIO_SINGLE_MODE << FREQ_RATIO_OFFSET); |
662 | ||
02bec490 TB |
663 | snd_printdd("->lx_init_ethersound\n"); |
664 | ||
665 | chip->freq_ratio = FREQ_RATIO_SINGLE_MODE; | |
666 | ||
667 | /* | |
668 | * write it to the card ! | |
669 | * this actually kicks the ES xilinx, the first time since poweron. | |
670 | * the MAC address in the Reg_ADMACESMSB Reg_ADMACESLSB registers | |
671 | * is not ready before this is done, and the bit 2 in Reg_CSES is set. | |
672 | * */ | |
673 | lx_dsp_reg_write(chip, eReg_CONFES, conf_es); | |
674 | ||
675 | for (i = 0; i != 1000; ++i) { | |
676 | if (lx_dsp_reg_read(chip, eReg_CSES) & 4) { | |
677 | snd_printd(LXP "ethersound initialized after %dms\n", | |
678 | i); | |
679 | goto ethersound_initialized; | |
680 | } | |
681 | msleep(1); | |
682 | } | |
683 | snd_printk(KERN_WARNING LXP | |
684 | "ethersound could not be initialized after %dms\n", i); | |
685 | return -ETIMEDOUT; | |
686 | ||
687 | ethersound_initialized: | |
688 | snd_printd(LXP "ethersound initialized\n"); | |
689 | return 0; | |
690 | } | |
691 | ||
692 | static int __devinit lx_init_get_version_features(struct lx6464es *chip) | |
693 | { | |
694 | u32 dsp_version; | |
695 | ||
696 | int err; | |
697 | ||
698 | snd_printdd("->lx_init_get_version_features\n"); | |
699 | ||
700 | err = lx_dsp_get_version(chip, &dsp_version); | |
701 | ||
702 | if (err == 0) { | |
703 | u32 freq; | |
704 | ||
705 | snd_printk(LXP "DSP version: V%02d.%02d #%d\n", | |
706 | (dsp_version>>16) & 0xff, (dsp_version>>8) & 0xff, | |
707 | dsp_version & 0xff); | |
708 | ||
709 | /* later: what firmware version do we expect? */ | |
710 | ||
711 | /* retrieve Play/Rec features */ | |
712 | /* done here because we may have to handle alternate | |
713 | * DSP files. */ | |
714 | /* later */ | |
715 | ||
716 | /* init the EtherSound sample rate */ | |
717 | err = lx_dsp_get_clock_frequency(chip, &freq); | |
718 | if (err == 0) | |
719 | chip->board_sample_rate = freq; | |
720 | snd_printd(LXP "actual clock frequency %d\n", freq); | |
721 | } else { | |
722 | snd_printk(KERN_ERR LXP "DSP corrupted \n"); | |
723 | err = -EAGAIN; | |
724 | } | |
725 | ||
726 | return err; | |
727 | } | |
728 | ||
729 | static int lx_set_granularity(struct lx6464es *chip, u32 gran) | |
730 | { | |
731 | int err = 0; | |
732 | u32 snapped_gran = MICROBLAZE_IBL_MIN; | |
733 | ||
734 | snd_printdd("->lx_set_granularity\n"); | |
735 | ||
736 | /* blocksize is a power of 2 */ | |
737 | while ((snapped_gran < gran) && | |
738 | (snapped_gran < MICROBLAZE_IBL_MAX)) { | |
739 | snapped_gran *= 2; | |
740 | } | |
741 | ||
742 | if (snapped_gran == chip->pcm_granularity) | |
743 | return 0; | |
744 | ||
745 | err = lx_dsp_set_granularity(chip, snapped_gran); | |
746 | if (err < 0) { | |
747 | snd_printk(KERN_WARNING LXP "could not set granularity\n"); | |
748 | err = -EAGAIN; | |
749 | } | |
750 | ||
751 | if (snapped_gran != gran) | |
752 | snd_printk(LXP "snapped blocksize to %d\n", snapped_gran); | |
753 | ||
754 | snd_printd(LXP "set blocksize on board %d\n", snapped_gran); | |
755 | chip->pcm_granularity = snapped_gran; | |
756 | ||
757 | return err; | |
758 | } | |
759 | ||
760 | /* initialize and test the xilinx dsp chip */ | |
761 | static int __devinit lx_init_dsp(struct lx6464es *chip) | |
762 | { | |
763 | int err; | |
764 | u8 mac_address[6]; | |
765 | int i; | |
766 | ||
767 | snd_printdd("->lx_init_dsp\n"); | |
768 | ||
769 | snd_printd(LXP "initialize board\n"); | |
770 | err = lx_init_xilinx_reset(chip); | |
771 | if (err) | |
772 | return err; | |
773 | ||
774 | snd_printd(LXP "testing board\n"); | |
775 | err = lx_init_xilinx_test(chip); | |
776 | if (err) | |
777 | return err; | |
778 | ||
779 | snd_printd(LXP "initialize ethersound configuration\n"); | |
780 | err = lx_init_ethersound_config(chip); | |
781 | if (err) | |
782 | return err; | |
783 | ||
784 | lx_irq_enable(chip); | |
785 | ||
786 | /** \todo the mac address should be ready by not, but it isn't, | |
787 | * so we wait for it */ | |
788 | for (i = 0; i != 1000; ++i) { | |
789 | err = lx_dsp_get_mac(chip, mac_address); | |
790 | if (err) | |
791 | return err; | |
792 | if (mac_address[0] || mac_address[1] || mac_address[2] || | |
793 | mac_address[3] || mac_address[4] || mac_address[5]) | |
794 | goto mac_ready; | |
795 | msleep(1); | |
796 | } | |
797 | return -ETIMEDOUT; | |
798 | ||
799 | mac_ready: | |
800 | snd_printd(LXP "mac address ready read after: %dms\n", i); | |
801 | snd_printk(LXP "mac address: %02X.%02X.%02X.%02X.%02X.%02X\n", | |
802 | mac_address[0], mac_address[1], mac_address[2], | |
803 | mac_address[3], mac_address[4], mac_address[5]); | |
804 | ||
805 | err = lx_init_get_version_features(chip); | |
806 | if (err) | |
807 | return err; | |
808 | ||
809 | lx_set_granularity(chip, MICROBLAZE_IBL_DEFAULT); | |
810 | ||
811 | chip->playback_mute = 0; | |
812 | ||
813 | return err; | |
814 | } | |
815 | ||
816 | static struct snd_pcm_ops lx_ops_playback = { | |
817 | .open = lx_pcm_open, | |
818 | .close = lx_pcm_close, | |
819 | .ioctl = snd_pcm_lib_ioctl, | |
820 | .prepare = lx_pcm_prepare, | |
821 | .hw_params = lx_pcm_hw_params_playback, | |
822 | .hw_free = lx_pcm_hw_free, | |
823 | .trigger = lx_pcm_trigger, | |
824 | .pointer = lx_pcm_stream_pointer, | |
825 | }; | |
826 | ||
827 | static struct snd_pcm_ops lx_ops_capture = { | |
828 | .open = lx_pcm_open, | |
829 | .close = lx_pcm_close, | |
830 | .ioctl = snd_pcm_lib_ioctl, | |
831 | .prepare = lx_pcm_prepare, | |
832 | .hw_params = lx_pcm_hw_params_capture, | |
833 | .hw_free = lx_pcm_hw_free, | |
834 | .trigger = lx_pcm_trigger, | |
835 | .pointer = lx_pcm_stream_pointer, | |
836 | }; | |
837 | ||
838 | static int __devinit lx_pcm_create(struct lx6464es *chip) | |
839 | { | |
840 | int err; | |
841 | struct snd_pcm *pcm; | |
842 | ||
843 | u32 size = 64 * /* channels */ | |
844 | 3 * /* 24 bit samples */ | |
845 | MAX_STREAM_BUFFER * /* periods */ | |
846 | MICROBLAZE_IBL_MAX * /* frames per period */ | |
847 | 2; /* duplex */ | |
848 | ||
849 | size = PAGE_ALIGN(size); | |
850 | ||
851 | /* hardcoded device name & channel count */ | |
852 | err = snd_pcm_new(chip->card, (char *)card_name, 0, | |
853 | 1, 1, &pcm); | |
854 | ||
855 | pcm->private_data = chip; | |
856 | ||
857 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &lx_ops_playback); | |
858 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &lx_ops_capture); | |
859 | ||
860 | pcm->info_flags = 0; | |
861 | strcpy(pcm->name, card_name); | |
862 | ||
863 | err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, | |
864 | snd_dma_pci_data(chip->pci), | |
865 | size, size); | |
866 | if (err < 0) | |
867 | return err; | |
868 | ||
869 | chip->pcm = pcm; | |
870 | chip->capture_stream.is_capture = 1; | |
871 | ||
872 | return 0; | |
873 | } | |
874 | ||
875 | static int lx_control_playback_info(struct snd_kcontrol *kcontrol, | |
876 | struct snd_ctl_elem_info *uinfo) | |
877 | { | |
878 | uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; | |
879 | uinfo->count = 1; | |
880 | uinfo->value.integer.min = 0; | |
881 | uinfo->value.integer.max = 1; | |
882 | return 0; | |
883 | } | |
884 | ||
885 | static int lx_control_playback_get(struct snd_kcontrol *kcontrol, | |
886 | struct snd_ctl_elem_value *ucontrol) | |
887 | { | |
888 | struct lx6464es *chip = snd_kcontrol_chip(kcontrol); | |
889 | ucontrol->value.integer.value[0] = chip->playback_mute; | |
890 | return 0; | |
891 | } | |
892 | ||
893 | static int lx_control_playback_put(struct snd_kcontrol *kcontrol, | |
894 | struct snd_ctl_elem_value *ucontrol) | |
895 | { | |
896 | struct lx6464es *chip = snd_kcontrol_chip(kcontrol); | |
897 | int changed = 0; | |
898 | int current_value = chip->playback_mute; | |
899 | ||
900 | if (current_value != ucontrol->value.integer.value[0]) { | |
901 | lx_level_unmute(chip, 0, !current_value); | |
902 | chip->playback_mute = !current_value; | |
903 | changed = 1; | |
904 | } | |
905 | return changed; | |
906 | } | |
907 | ||
908 | static struct snd_kcontrol_new lx_control_playback_switch __devinitdata = { | |
909 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, | |
910 | .name = "PCM Playback Switch", | |
911 | .index = 0, | |
912 | .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, | |
913 | .private_value = 0, | |
914 | .info = lx_control_playback_info, | |
915 | .get = lx_control_playback_get, | |
916 | .put = lx_control_playback_put | |
917 | }; | |
918 | ||
919 | ||
920 | ||
921 | static void lx_proc_levels_read(struct snd_info_entry *entry, | |
922 | struct snd_info_buffer *buffer) | |
923 | { | |
924 | u32 levels[64]; | |
925 | int err; | |
926 | int i, j; | |
927 | struct lx6464es *chip = entry->private_data; | |
928 | ||
929 | snd_iprintf(buffer, "capture levels:\n"); | |
930 | err = lx_level_peaks(chip, 1, 64, levels); | |
931 | if (err < 0) | |
932 | return; | |
933 | ||
934 | for (i = 0; i != 8; ++i) { | |
935 | for (j = 0; j != 8; ++j) | |
936 | snd_iprintf(buffer, "%08x ", levels[i*8+j]); | |
937 | snd_iprintf(buffer, "\n"); | |
938 | } | |
939 | ||
940 | snd_iprintf(buffer, "\nplayback levels:\n"); | |
941 | ||
942 | err = lx_level_peaks(chip, 0, 64, levels); | |
943 | if (err < 0) | |
944 | return; | |
945 | ||
946 | for (i = 0; i != 8; ++i) { | |
947 | for (j = 0; j != 8; ++j) | |
948 | snd_iprintf(buffer, "%08x ", levels[i*8+j]); | |
949 | snd_iprintf(buffer, "\n"); | |
950 | } | |
951 | ||
952 | snd_iprintf(buffer, "\n"); | |
953 | } | |
954 | ||
955 | static int __devinit lx_proc_create(struct snd_card *card, struct lx6464es *chip) | |
956 | { | |
957 | struct snd_info_entry *entry; | |
958 | int err = snd_card_proc_new(card, "levels", &entry); | |
959 | if (err < 0) | |
960 | return err; | |
961 | ||
962 | snd_info_set_text_ops(entry, chip, lx_proc_levels_read); | |
963 | return 0; | |
964 | } | |
965 | ||
966 | ||
967 | static int __devinit snd_lx6464es_create(struct snd_card *card, | |
968 | struct pci_dev *pci, | |
969 | struct lx6464es **rchip) | |
970 | { | |
971 | struct lx6464es *chip; | |
972 | int err; | |
973 | ||
974 | static struct snd_device_ops ops = { | |
975 | .dev_free = snd_lx6464es_dev_free, | |
976 | }; | |
977 | ||
978 | snd_printdd("->snd_lx6464es_create\n"); | |
979 | ||
980 | *rchip = NULL; | |
981 | ||
982 | /* enable PCI device */ | |
983 | err = pci_enable_device(pci); | |
984 | if (err < 0) | |
985 | return err; | |
986 | ||
987 | pci_set_master(pci); | |
988 | ||
989 | /* check if we can restrict PCI DMA transfers to 32 bits */ | |
8e20ce94 | 990 | err = pci_set_dma_mask(pci, DMA_BIT_MASK(32)); |
02bec490 TB |
991 | if (err < 0) { |
992 | snd_printk(KERN_ERR "architecture does not support " | |
993 | "32bit PCI busmaster DMA\n"); | |
994 | pci_disable_device(pci); | |
995 | return -ENXIO; | |
996 | } | |
997 | ||
998 | chip = kzalloc(sizeof(*chip), GFP_KERNEL); | |
999 | if (chip == NULL) { | |
1000 | err = -ENOMEM; | |
1001 | goto alloc_failed; | |
1002 | } | |
1003 | ||
1004 | chip->card = card; | |
1005 | chip->pci = pci; | |
1006 | chip->irq = -1; | |
1007 | ||
1008 | /* initialize synchronization structs */ | |
1009 | spin_lock_init(&chip->lock); | |
1010 | spin_lock_init(&chip->msg_lock); | |
1011 | mutex_init(&chip->setup_mutex); | |
1012 | tasklet_init(&chip->trigger_tasklet, lx_trigger_tasklet, | |
1013 | (unsigned long)chip); | |
1014 | tasklet_init(&chip->tasklet_capture, lx_tasklet_capture, | |
1015 | (unsigned long)chip); | |
1016 | tasklet_init(&chip->tasklet_playback, lx_tasklet_playback, | |
1017 | (unsigned long)chip); | |
1018 | ||
1019 | /* request resources */ | |
1020 | err = pci_request_regions(pci, card_name); | |
1021 | if (err < 0) | |
1022 | goto request_regions_failed; | |
1023 | ||
1024 | /* plx port */ | |
1025 | chip->port_plx = pci_resource_start(pci, 1); | |
1026 | chip->port_plx_remapped = ioport_map(chip->port_plx, | |
1027 | pci_resource_len(pci, 1)); | |
1028 | ||
1029 | /* dsp port */ | |
1030 | chip->port_dsp_bar = pci_ioremap_bar(pci, 2); | |
1031 | ||
1032 | err = request_irq(pci->irq, lx_interrupt, IRQF_SHARED, | |
1033 | card_name, chip); | |
1034 | if (err) { | |
1035 | snd_printk(KERN_ERR LXP "unable to grab IRQ %d\n", pci->irq); | |
1036 | goto request_irq_failed; | |
1037 | } | |
1038 | chip->irq = pci->irq; | |
1039 | ||
1040 | err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops); | |
1041 | if (err < 0) | |
1042 | goto device_new_failed; | |
1043 | ||
1044 | err = lx_init_dsp(chip); | |
1045 | if (err < 0) { | |
1046 | snd_printk(KERN_ERR LXP "error during DSP initialization\n"); | |
1047 | return err; | |
1048 | } | |
1049 | ||
1050 | err = lx_pcm_create(chip); | |
1051 | if (err < 0) | |
1052 | return err; | |
1053 | ||
1054 | err = lx_proc_create(card, chip); | |
1055 | if (err < 0) | |
1056 | return err; | |
1057 | ||
1058 | err = snd_ctl_add(card, snd_ctl_new1(&lx_control_playback_switch, | |
1059 | chip)); | |
1060 | if (err < 0) | |
1061 | return err; | |
1062 | ||
1063 | snd_card_set_dev(card, &pci->dev); | |
1064 | ||
1065 | *rchip = chip; | |
1066 | return 0; | |
1067 | ||
1068 | device_new_failed: | |
1069 | free_irq(pci->irq, chip); | |
1070 | ||
1071 | request_irq_failed: | |
1072 | pci_release_regions(pci); | |
1073 | ||
1074 | request_regions_failed: | |
1075 | kfree(chip); | |
1076 | ||
1077 | alloc_failed: | |
1078 | pci_disable_device(pci); | |
1079 | ||
1080 | return err; | |
1081 | } | |
1082 | ||
1083 | static int __devinit snd_lx6464es_probe(struct pci_dev *pci, | |
1084 | const struct pci_device_id *pci_id) | |
1085 | { | |
1086 | static int dev; | |
1087 | struct snd_card *card; | |
1088 | struct lx6464es *chip; | |
1089 | int err; | |
1090 | ||
1091 | snd_printdd("->snd_lx6464es_probe\n"); | |
1092 | ||
1093 | if (dev >= SNDRV_CARDS) | |
1094 | return -ENODEV; | |
1095 | if (!enable[dev]) { | |
1096 | dev++; | |
1097 | return -ENOENT; | |
1098 | } | |
1099 | ||
7852fd08 TI |
1100 | err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card); |
1101 | if (err < 0) | |
1102 | return err; | |
02bec490 TB |
1103 | |
1104 | err = snd_lx6464es_create(card, pci, &chip); | |
1105 | if (err < 0) { | |
1106 | snd_printk(KERN_ERR LXP "error during snd_lx6464es_create\n"); | |
1107 | goto out_free; | |
1108 | } | |
1109 | ||
1110 | strcpy(card->driver, "lx6464es"); | |
1111 | strcpy(card->shortname, "Digigram LX6464ES"); | |
1112 | sprintf(card->longname, "%s at 0x%lx, 0x%p, irq %i", | |
1113 | card->shortname, chip->port_plx, | |
1114 | chip->port_dsp_bar, chip->irq); | |
1115 | ||
1116 | err = snd_card_register(card); | |
1117 | if (err < 0) | |
1118 | goto out_free; | |
1119 | ||
1120 | snd_printdd(LXP "initialization successful\n"); | |
1121 | pci_set_drvdata(pci, card); | |
1122 | dev++; | |
1123 | return 0; | |
1124 | ||
1125 | out_free: | |
1126 | snd_card_free(card); | |
1127 | return err; | |
1128 | ||
1129 | } | |
1130 | ||
1131 | static void __devexit snd_lx6464es_remove(struct pci_dev *pci) | |
1132 | { | |
1133 | snd_card_free(pci_get_drvdata(pci)); | |
1134 | pci_set_drvdata(pci, NULL); | |
1135 | } | |
1136 | ||
1137 | ||
1138 | static struct pci_driver driver = { | |
1139 | .name = "Digigram LX6464ES", | |
1140 | .id_table = snd_lx6464es_ids, | |
1141 | .probe = snd_lx6464es_probe, | |
1142 | .remove = __devexit_p(snd_lx6464es_remove), | |
1143 | }; | |
1144 | ||
1145 | ||
1146 | /* module initialization */ | |
1147 | static int __init mod_init(void) | |
1148 | { | |
1149 | return pci_register_driver(&driver); | |
1150 | } | |
1151 | ||
1152 | static void __exit mod_exit(void) | |
1153 | { | |
1154 | pci_unregister_driver(&driver); | |
1155 | } | |
1156 | ||
1157 | module_init(mod_init); | |
1158 | module_exit(mod_exit); |