aboutsummaryrefslogtreecommitdiffstats
path: root/sound/pci/oxygen/oxygen.c
blob: 289cb4dacfc79ec012b6efb174054efaa0afe855 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
/*
 * C-Media CMI8788 driver for C-Media's reference design and similar models
 *
 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
 *
 *
 *  This driver is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License, version 2.
 *
 *  This driver is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this driver; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

/*
 * CMI8788:
 *
 * SPI 0 -> 1st AK4396 (front)
 * SPI 1 -> 2nd AK4396 (surround)
 * SPI 2 -> 3rd AK4396 (center/LFE)
 * SPI 3 -> WM8785
 * SPI 4 -> 4th AK4396 (back)
 *
 * GPIO 0 -> DFS0 of AK5385
 * GPIO 1 -> DFS1 of AK5385
 * GPIO 8 -> enable headphone amplifier on HT-Omega models
 *
 * CM9780:
 *
 * GPO 0 -> route line-in (0) or AC97 output (1) to ADC input
 */

#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/pci.h>
#include <sound/ac97_codec.h>
#include <sound/control.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/tlv.h>
#include "oxygen.h"
#include "ak4396.h"
#include "wm8785.h"

MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
MODULE_DESCRIPTION("C-Media CMI8788 driver");
MODULE_LICENSE("GPL v2");
MODULE_SUPPORTED_DEVICE("{{C-Media,CMI8788}}");

static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "card index");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "enable card");

enum {
	MODEL_CMEDIA_REF,	/* C-Media's reference design */
	MODEL_MERIDIAN,		/* AuzenTech X-Meridian */
	MODEL_CLARO,		/* HT-Omega Claro */
	MODEL_CLARO_HALO,	/* HT-Omega Claro halo */
};

static DEFINE_PCI_DEVICE_TABLE(oxygen_ids) = {
	{ OXYGEN_PCI_SUBID(0x10b0, 0x0216), .driver_data = MODEL_CMEDIA_REF },
	{ OXYGEN_PCI_SUBID(0x10b0, 0x0218), .driver_data = MODEL_CMEDIA_REF },
	{ OXYGEN_PCI_SUBID(0x10b0, 0x0219), .driver_data = MODEL_CMEDIA_REF },
	{ OXYGEN_PCI_SUBID(0x13f6, 0x0001), .driver_data = MODEL_CMEDIA_REF },
	{ OXYGEN_PCI_SUBID(0x13f6, 0x0010), .driver_data = MODEL_CMEDIA_REF },
	{ OXYGEN_PCI_SUBID(0x13f6, 0x8788), .driver_data = MODEL_CMEDIA_REF },
	{ OXYGEN_PCI_SUBID(0x147a, 0xa017), .driver_data = MODEL_CMEDIA_REF },
	{ OXYGEN_PCI_SUBID(0x1a58, 0x0910), .driver_data = MODEL_CMEDIA_REF },
	{ OXYGEN_PCI_SUBID(0x415a, 0x5431), .driver_data = MODEL_MERIDIAN },
	{ OXYGEN_PCI_SUBID(0x7284, 0x9761), .driver_data = MODEL_CLARO },
	{ OXYGEN_PCI_SUBID(0x7284, 0x9781), .driver_data = MODEL_CLARO_HALO },
	{ }
};
MODULE_DEVICE_TABLE(pci, oxygen_ids);


#define GPIO_AK5385_DFS_MASK	0x0003
#define GPIO_AK5385_DFS_NORMAL	0x0000
#define GPIO_AK5385_DFS_DOUBLE	0x0001
#define GPIO_AK5385_DFS_QUAD	0x0002

#define GPIO_CLARO_HP		0x0100

struct generic_data {
	u8 ak4396_regs[4][5];
	u16 wm8785_regs[3];
};

static void ak4396_write(struct oxygen *chip, unsigned int codec,
			 u8 reg, u8 value)
{
	/* maps ALSA channel pair number to SPI output */
	static const u8 codec_spi_map[4] = {
		0, 1, 2, 4
	};
	struct generic_data *data = chip->model_data;

	oxygen_write_spi(chip, OXYGEN_SPI_TRIGGER |
			 OXYGEN_SPI_DATA_LENGTH_2 |
			 OXYGEN_SPI_CLOCK_160 |
			 (codec_spi_map[codec] << OXYGEN_SPI_CODEC_SHIFT) |
			 OXYGEN_SPI_CEN_LATCH_CLOCK_HI,
			 AK4396_WRITE | (reg << 8) | value);
	data->ak4396_regs[codec][reg] = value;
}

static void ak4396_write_cached(struct oxygen *chip, unsigned int codec,
				u8 reg, u8 value)
{
	struct generic_data *data = chip->model_data;

	if (value != data->ak4396_regs[codec][reg])
		ak4396_write(chip, codec, reg, value);
}

static void wm8785_write(struct oxygen *chip, u8 reg, unsigned int value)
{
	struct generic_data *data = chip->model_data;

	oxygen_write_spi(chip, OXYGEN_SPI_TRIGGER |
			 OXYGEN_SPI_DATA_LENGTH_2 |
			 OXYGEN_SPI_CLOCK_160 |
			 (3 << OXYGEN_SPI_CODEC_SHIFT) |
			 OXYGEN_SPI_CEN_LATCH_CLOCK_LO,
			 (reg << 9) | value);
	if (reg < ARRAY_SIZE(data->wm8785_regs))
		data->wm8785_regs[reg] = value;
}

static void ak4396_registers_init(struct oxygen *chip)
{
	struct generic_data *data = chip->model_data;
	unsigned int i;

	for (i = 0; i < 4; ++i) {
		ak4396_write(chip, i, AK4396_CONTROL_1,
			     AK4396_DIF_24_MSB | AK4396_RSTN);
		ak4396_write(chip, i, AK4396_CONTROL_2,
			     data->ak4396_regs[0][AK4396_CONTROL_2]);
		ak4396_write(chip, i, AK4396_CONTROL_3,
			     AK4396_PCM);
		ak4396_write(chip, i, AK4396_LCH_ATT,
			     chip->dac_volume[i * 2]);
		ak4396_write(chip, i, AK4396_RCH_ATT,
			     chip->dac_volume[i * 2 + 1]);
	}
}

static void ak4396_init(struct oxygen *chip)
{
	struct generic_data *data = chip->model_data;

	data->ak4396_regs[0][AK4396_CONTROL_2] =
		AK4396_SMUTE | AK4396_DEM_OFF | AK4396_DFS_NORMAL;
	ak4396_registers_init(chip);
	snd_component_add(chip->card, "AK4396");
}

static void ak5385_init(struct oxygen *chip)
{
	oxygen_set_bits16(chip, OXYGEN_GPIO_CONTROL, GPIO_AK5385_DFS_MASK);
	oxygen_clear_bits16(chip, OXYGEN_GPIO_DATA, GPIO_AK5385_DFS_MASK);
	snd_component_add(chip->card, "AK5385");
}

static void wm8785_registers_init(struct oxygen *chip)
{
	struct generic_data *data = chip->model_data;

	wm8785_write(chip, WM8785_R7, 0);
	wm8785_write(chip, WM8785_R0, data->wm8785_regs[0]);
	wm8785_write(chip, WM8785_R2, data->wm8785_regs[2]);
}

static void wm8785_init(struct oxygen *chip)
{
	struct generic_data *data = chip->model_data;

	data->wm8785_regs[0] =
		WM8785_MCR_SLAVE | WM8785_OSR_SINGLE | WM8785_FORMAT_LJUST;
	data->wm8785_regs[2] = WM8785_HPFR | WM8785_HPFL;
	wm8785_registers_init(chip);
	snd_component_add(chip->card, "WM8785");
}

static void generic_init(struct oxygen *chip)
{
	ak4396_init(chip);
	wm8785_init(chip);
}

static void meridian_init(struct oxygen *chip)
{
	ak4396_init(chip);
	ak5385_init(chip);
}

static void claro_enable_hp(struct oxygen *chip)
{
	msleep(300);
	oxygen_set_bits16(chip, OXYGEN_GPIO_CONTROL, GPIO_CLARO_HP);
	oxygen_set_bits16(chip, OXYGEN_GPIO_DATA, GPIO_CLARO_HP);
}

static void claro_init(struct oxygen *chip)
{
	ak4396_init(chip);
	wm8785_init(chip);
	claro_enable_hp(chip);
}

static void claro_halo_init(struct oxygen *chip)
{
	ak4396_init(chip);
	ak5385_init(chip);
	claro_enable_hp(chip);
}

static void generic_cleanup(struct oxygen *chip)
{
}

static void claro_disable_hp(struct oxygen *chip)
{
	oxygen_clear_bits16(chip, OXYGEN_GPIO_DATA, GPIO_CLARO_HP);
}

static void claro_cleanup(struct oxygen *chip)
{
	claro_disable_hp(chip);
}

static void claro_suspend(struct oxygen *chip)
{
	claro_disable_hp(chip);
}

static void generic_resume(struct oxygen *chip)
{
	ak4396_registers_init(chip);
	wm8785_registers_init(chip);
}

static void meridian_resume(struct oxygen *chip)
{
	ak4396_registers_init(chip);
}

static void claro_resume(struct oxygen *chip)
{
	ak4396_registers_init(chip);
	claro_enable_hp(chip);
}

static void set_ak4396_params(struct oxygen *chip,
			      struct snd_pcm_hw_params *params)
{
	struct generic_data *data = chip->model_data;
	unsigned int i;
	u8 value;

	value = data->ak4396_regs[0][AK4396_CONTROL_2] & ~AK4396_DFS_MASK;
	if (params_rate(params) <= 54000)
		value |= AK4396_DFS_NORMAL;
	else if (params_rate(params) <= 108000)
		value |= AK4396_DFS_DOUBLE;
	else
		value |= AK4396_DFS_QUAD;

	msleep(1); /* wait for the new MCLK to become stable */

	if (value != data->ak4396_regs[0][AK4396_CONTROL_2]) {
		for (i = 0; i < 4; ++i) {
			ak4396_write(chip, i, AK4396_CONTROL_1,
				     AK4396_DIF_24_MSB);
			ak4396_write(chip, i, AK4396_CONTROL_2, value);
			ak4396_write(chip, i, AK4396_CONTROL_1,
				     AK4396_DIF_24_MSB | AK4396_RSTN);
		}
	}
}

static void update_ak4396_volume(struct oxygen *chip)
{
	unsigned int i;

	for (i = 0; i < 4; ++i) {
		ak4396_write_cached(chip, i, AK4396_LCH_ATT,
				    chip->dac_volume[i * 2]);
		ak4396_write_cached(chip, i, AK4396_RCH_ATT,
				    chip->dac_volume[i * 2 + 1]);
	}
}

static void update_ak4396_mute(struct oxygen *chip)
{
	struct generic_data *data = chip->model_data;
	unsigned int i;
	u8 value;

	value = data->ak4396_regs[0][AK4396_CONTROL_2] & ~AK4396_SMUTE;
	if (chip->dac_mute)
		value |= AK4396_SMUTE;
	for (i = 0; i < 4; ++i)
		ak4396_write_cached(chip, i, AK4396_CONTROL_2, value);
}

static void set_wm8785_params(struct oxygen *chip,
			      struct snd_pcm_hw_params *params)
{
	struct generic_data *data = chip->model_data;
	unsigned int value;

	value = WM8785_MCR_SLAVE | WM8785_FORMAT_LJUST;
	if (params_rate(params) <= 48000)
		value |= WM8785_OSR_SINGLE;
	else if (params_rate(params) <= 96000)
		value |= WM8785_OSR_DOUBLE;
	else
		value |= WM8785_OSR_QUAD;
	if (value != data->wm8785_regs[0]) {
		wm8785_write(chip, WM8785_R7, 0);
		wm8785_write(chip, WM8785_R0, value);
		wm8785_write(chip, WM8785_R2, data->wm8785_regs[2]);
	}
}

static void set_ak5385_params(struct oxygen *chip,
			      struct snd_pcm_hw_params *params)
{
	unsigned int value;

	if (params_rate(params) <= 54000)
		value = GPIO_AK5385_DFS_NORMAL;
	else if (params_rate(params) <= 108000)
		value = GPIO_AK5385_DFS_DOUBLE;
	else
		value = GPIO_AK5385_DFS_QUAD;
	oxygen_write16_masked(chip, OXYGEN_GPIO_DATA,
			      value, GPIO_AK5385_DFS_MASK);
}

static int rolloff_info(struct snd_kcontrol *ctl,
			struct snd_ctl_elem_info *info)
{
	static const char *const names[2] = {
		"Sharp Roll-off", "Slow Roll-off"
	};

	info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	info->count = 1;
	info->value.enumerated.items = 2;
	if (info->value.enumerated.item >= 2)
		info->value.enumerated.item = 1;
	strcpy(info->value.enumerated.name, names[info->value.enumerated.item]);
	return 0;
}

static int rolloff_get(struct snd_kcontrol *ctl,
		       struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	struct generic_data *data = chip->model_data;

	value->value.enumerated.item[0] =
		(data->ak4396_regs[0][AK4396_CONTROL_2] & AK4396_SLOW) != 0;
	return 0;
}

static int rolloff_put(struct snd_kcontrol *ctl,
		       struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	struct generic_data *data = chip->model_data;
	unsigned int i;
	int changed;
	u8 reg;

	mutex_lock(&chip->mutex);
	reg = data->ak4396_regs[0][AK4396_CONTROL_2];
	if (value->value.enumerated.item[0])
		reg |= AK4396_SLOW;
	else
		reg &= ~AK4396_SLOW;
	changed = reg != data->ak4396_regs[0][AK4396_CONTROL_2];
	if (changed) {
		for (i = 0; i < 4; ++i)
			ak4396_write(chip, i, AK4396_CONTROL_2, reg);
	}
	mutex_unlock(&chip->mutex);
	return changed;
}

static const struct snd_kcontrol_new rolloff_control = {
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "DAC Filter Playback Enum",
	.info = rolloff_info,
	.get = rolloff_get,
	.put = rolloff_put,
};

static int hpf_info(struct snd_kcontrol *ctl, struct snd_ctl_elem_info *info)
{
	static const char *const names[2] = {
		"None", "High-pass Filter"
	};

	info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	info->count = 1;
	info->value.enumerated.items = 2;
	if (info->value.enumerated.item >= 2)
		info->value.enumerated.item = 1;
	strcpy(info->value.enumerated.name, names[info->value.enumerated.item]);
	return 0;
}

static int hpf_get(struct snd_kcontrol *ctl, struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	struct generic_data *data = chip->model_data;

	value->value.enumerated.item[0] =
		(data->wm8785_regs[WM8785_R2] & WM8785_HPFR) != 0;
	return 0;
}

static int hpf_put(struct snd_kcontrol *ctl, struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	struct generic_data *data = chip->model_data;
	unsigned int reg;
	int changed;

	mutex_lock(&chip->mutex);
	reg = data->wm8785_regs[WM8785_R2] & ~(WM8785_HPFR | WM8785_HPFL);
	if (value->value.enumerated.item[0])
		reg |= WM8785_HPFR | WM8785_HPFL;
	changed = reg != data->wm8785_regs[WM8785_R2];
	if (changed)
		wm8785_write(chip, WM8785_R2, reg);
	mutex_unlock(&chip->mutex);
	return changed;
}

static const struct snd_kcontrol_new hpf_control = {
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "ADC Filter Capture Enum",
	.info = hpf_info,
	.get = hpf_get,
	.put = hpf_put,
};

static int generic_mixer_init(struct oxygen *chip)
{
	return snd_ctl_add(chip->card, snd_ctl_new1(&rolloff_control, chip));
}

static int generic_wm8785_mixer_init(struct oxygen *chip)
{
	int err;

	err = generic_mixer_init(chip);
	if (err < 0)
		return err;
	err = snd_ctl_add(chip->card, snd_ctl_new1(&hpf_control, chip));
	if (err < 0)
		return err;
	return 0;
}

static const DECLARE_TLV_DB_LINEAR(ak4396_db_scale, TLV_DB_GAIN_MUTE, 0);

static const struct oxygen_model model_generic = {
	.shortname = "C-Media CMI8788",
	.longname = "C-Media Oxygen HD Audio",
	.chip = "CMI8788",
	.init = generic_init,
	.mixer_init = generic_wm8785_mixer_init,
	.cleanup = generic_cleanup,
	.resume = generic_resume,
	.get_i2s_mclk = oxygen_default_i2s_mclk,
	.set_dac_params = set_ak4396_params,
	.set_adc_params = set_wm8785_params,
	.update_dac_volume = update_ak4396_volume,
	.update_dac_mute = update_ak4396_mute,
	.dac_tlv = ak4396_db_scale,
	.model_data_size = sizeof(struct generic_data),
	.device_config = PLAYBACK_0_TO_I2S |
			 PLAYBACK_1_TO_SPDIF |
			 PLAYBACK_2_TO_AC97_1 |
			 CAPTURE_0_FROM_I2S_1 |
			 CAPTURE_1_FROM_SPDIF |
			 CAPTURE_2_FROM_AC97_1,
	.dac_channels = 8,
	.dac_volume_min = 0,
	.dac_volume_max = 255,
	.function_flags = OXYGEN_FUNCTION_SPI |
			  OXYGEN_FUNCTION_ENABLE_SPI_4_5,
	.dac_i2s_format = OXYGEN_I2S_FORMAT_LJUST,
	.adc_i2s_format = OXYGEN_I2S_FORMAT_LJUST,
};

static int __devinit get_oxygen_model(struct oxygen *chip,
				      const struct pci_device_id *id)
{
	chip->model = model_generic;
	switch (id->driver_data) {
	case MODEL_MERIDIAN:
		chip->model.init = meridian_init;
		chip->model.mixer_init = generic_mixer_init;
		chip->model.resume = meridian_resume;
		chip->model.set_adc_params = set_ak5385_params;
		chip->model.device_config = PLAYBACK_0_TO_I2S |
					    PLAYBACK_1_TO_SPDIF |
					    CAPTURE_0_FROM_I2S_2 |
					    CAPTURE_1_FROM_SPDIF;
		break;
	case MODEL_CLARO:
		chip->model.init = claro_init;
		chip->model.cleanup = claro_cleanup;
		chip->model.suspend = claro_suspend;
		chip->model.resume = claro_resume;
		break;
	case MODEL_CLARO_HALO:
		chip->model.init = claro_halo_init;
		chip->model.mixer_init = generic_mixer_init;
		chip->model.cleanup = claro_cleanup;
		chip->model.suspend = claro_suspend;
		chip->model.resume = claro_resume;
		chip->model.set_adc_params = set_ak5385_params;
		break;
	}
	if (id->driver_data == MODEL_MERIDIAN ||
	    id->driver_data == MODEL_CLARO_HALO) {
		chip->model.misc_flags = OXYGEN_MISC_MIDI;
		chip->model.device_config |= MIDI_OUTPUT | MIDI_INPUT;
	}
	return 0;
}

static int __devinit generic_oxygen_probe(struct pci_dev *pci,
					  const struct pci_device_id *pci_id)
{
	static int dev;
	int err;

	if (dev >= SNDRV_CARDS)
		return -ENODEV;
	if (!enable[dev]) {
		++dev;
		return -ENOENT;
	}
	err = oxygen_pci_probe(pci, index[dev], id[dev], THIS_MODULE,
			       oxygen_ids, get_oxygen_model);
	if (err >= 0)
		++dev;
	return err;
}

static struct pci_driver oxygen_driver = {
	.name = "CMI8788",
	.id_table = oxygen_ids,
	.probe = generic_oxygen_probe,
	.remove = __devexit_p(oxygen_pci_remove),
#ifdef CONFIG_PM
	.suspend = oxygen_pci_suspend,
	.resume = oxygen_pci_resume,
#endif
};

static int __init alsa_card_oxygen_init(void)
{
	return pci_register_driver(&oxygen_driver);
}

static void __exit alsa_card_oxygen_exit(void)
{
	pci_unregister_driver(&oxygen_driver);
}

module_init(alsa_card_oxygen_init)
module_exit(alsa_card_oxygen_exit)