1 /*
2 * uda134x.c -- UDA134X ALSA SoC Codec driver
3 *
4 * Modifications by Christian Pellegrin <chripell@evolware.org>
5 *
6 * Copyright 2007 Dension Audio Systems Ltd.
7 * Author: Zoltan Devai
8 *
9 * Based on the WM87xx drivers by Liam Girdwood and Richard Purdie
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16 #include <linux/module.h>
17 #include <linux/delay.h>
18 #include <sound/pcm.h>
19 #include <sound/pcm_params.h>
20 #include <sound/soc.h>
21 #include <sound/soc-dapm.h>
22 #include <sound/initval.h>
23
24 #include <sound/uda134x.h>
25 #include <sound/l3.h>
26
27 #include "uda134x.h"
28
29
30 #define POWER_OFF_ON_STANDBY 1
31 /*
32 ALSA SOC usually puts the device in standby mode when it's not used
33 for sometime. If you define POWER_OFF_ON_STANDBY the driver will
34 turn off the ADC/DAC when this callback is invoked and turn it back
35 on when needed. Unfortunately this will result in a very light bump
36 (it can be audible only with good earphones). If this bothers you
37 just comment this line, you will have slightly higher power
38 consumption . Please note that sending the L3 command for ADC is
39 enough to make the bump, so it doesn't make difference if you
40 completely take off power from the codec.
41 */
42
43 #define UDA134X_RATES SNDRV_PCM_RATE_8000_48000
44 #define UDA134X_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
45 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S20_3LE)
46
47 struct uda134x_priv {
48 int sysclk;
49 int dai_fmt;
50
51 struct snd_pcm_substream *master_substream;
52 struct snd_pcm_substream *slave_substream;
53 };
54
55 /* In-data addresses are hard-coded into the reg-cache values */
56 static const char uda134x_reg[UDA134X_REGS_NUM] = {
57 /* Extended address registers */
58 0x04, 0x04, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
59 /* Status, data regs */
60 0x00, 0x83, 0x00, 0x40, 0x80, 0x00,
61 };
62
63 /*
64 * The codec has no support for reading its registers except for peak level...
65 */
uda134x_read_reg_cache(struct snd_soc_codec * codec,unsigned int reg)66 static inline unsigned int uda134x_read_reg_cache(struct snd_soc_codec *codec,
67 unsigned int reg)
68 {
69 u8 *cache = codec->reg_cache;
70
71 if (reg >= UDA134X_REGS_NUM)
72 return -1;
73 return cache[reg];
74 }
75
76 /*
77 * Write the register cache
78 */
uda134x_write_reg_cache(struct snd_soc_codec * codec,u8 reg,unsigned int value)79 static inline void uda134x_write_reg_cache(struct snd_soc_codec *codec,
80 u8 reg, unsigned int value)
81 {
82 u8 *cache = codec->reg_cache;
83
84 if (reg >= UDA134X_REGS_NUM)
85 return;
86 cache[reg] = value;
87 }
88
89 /*
90 * Write to the uda134x registers
91 *
92 */
uda134x_write(struct snd_soc_codec * codec,unsigned int reg,unsigned int value)93 static int uda134x_write(struct snd_soc_codec *codec, unsigned int reg,
94 unsigned int value)
95 {
96 int ret;
97 u8 addr;
98 u8 data = value;
99 struct uda134x_platform_data *pd = codec->control_data;
100
101 pr_debug("%s reg: %02X, value:%02X\n", __func__, reg, value);
102
103 if (reg >= UDA134X_REGS_NUM) {
104 printk(KERN_ERR "%s unkown register: reg: %d",
105 __func__, reg);
106 return -EINVAL;
107 }
108
109 uda134x_write_reg_cache(codec, reg, value);
110
111 switch (reg) {
112 case UDA134X_STATUS0:
113 case UDA134X_STATUS1:
114 addr = UDA134X_STATUS_ADDR;
115 break;
116 case UDA134X_DATA000:
117 case UDA134X_DATA001:
118 case UDA134X_DATA010:
119 addr = UDA134X_DATA0_ADDR;
120 break;
121 case UDA134X_DATA1:
122 addr = UDA134X_DATA1_ADDR;
123 break;
124 default:
125 /* It's an extended address register */
126 addr = (reg | UDA134X_EXTADDR_PREFIX);
127
128 ret = l3_write(&pd->l3,
129 UDA134X_DATA0_ADDR, &addr, 1);
130 if (ret != 1)
131 return -EIO;
132
133 addr = UDA134X_DATA0_ADDR;
134 data = (value | UDA134X_EXTDATA_PREFIX);
135 break;
136 }
137
138 ret = l3_write(&pd->l3,
139 addr, &data, 1);
140 if (ret != 1)
141 return -EIO;
142
143 return 0;
144 }
145
uda134x_reset(struct snd_soc_codec * codec)146 static inline void uda134x_reset(struct snd_soc_codec *codec)
147 {
148 u8 reset_reg = uda134x_read_reg_cache(codec, UDA134X_STATUS0);
149 uda134x_write(codec, UDA134X_STATUS0, reset_reg | (1<<6));
150 msleep(1);
151 uda134x_write(codec, UDA134X_STATUS0, reset_reg & ~(1<<6));
152 }
153
uda134x_mute(struct snd_soc_dai * dai,int mute)154 static int uda134x_mute(struct snd_soc_dai *dai, int mute)
155 {
156 struct snd_soc_codec *codec = dai->codec;
157 u8 mute_reg = uda134x_read_reg_cache(codec, UDA134X_DATA010);
158
159 pr_debug("%s mute: %d\n", __func__, mute);
160
161 if (mute)
162 mute_reg |= (1<<2);
163 else
164 mute_reg &= ~(1<<2);
165
166 uda134x_write(codec, UDA134X_DATA010, mute_reg & ~(1<<2));
167
168 return 0;
169 }
170
uda134x_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)171 static int uda134x_startup(struct snd_pcm_substream *substream,
172 struct snd_soc_dai *dai)
173 {
174 struct snd_soc_pcm_runtime *rtd = substream->private_data;
175 struct snd_soc_device *socdev = rtd->socdev;
176 struct snd_soc_codec *codec = socdev->codec;
177 struct uda134x_priv *uda134x = codec->private_data;
178 struct snd_pcm_runtime *master_runtime;
179
180 if (uda134x->master_substream) {
181 master_runtime = uda134x->master_substream->runtime;
182
183 pr_debug("%s constraining to %d bits at %d\n", __func__,
184 master_runtime->sample_bits,
185 master_runtime->rate);
186
187 snd_pcm_hw_constraint_minmax(substream->runtime,
188 SNDRV_PCM_HW_PARAM_RATE,
189 master_runtime->rate,
190 master_runtime->rate);
191
192 snd_pcm_hw_constraint_minmax(substream->runtime,
193 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
194 master_runtime->sample_bits,
195 master_runtime->sample_bits);
196
197 uda134x->slave_substream = substream;
198 } else
199 uda134x->master_substream = substream;
200
201 return 0;
202 }
203
uda134x_shutdown(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)204 static void uda134x_shutdown(struct snd_pcm_substream *substream,
205 struct snd_soc_dai *dai)
206 {
207 struct snd_soc_pcm_runtime *rtd = substream->private_data;
208 struct snd_soc_device *socdev = rtd->socdev;
209 struct snd_soc_codec *codec = socdev->codec;
210 struct uda134x_priv *uda134x = codec->private_data;
211
212 if (uda134x->master_substream == substream)
213 uda134x->master_substream = uda134x->slave_substream;
214
215 uda134x->slave_substream = NULL;
216 }
217
uda134x_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)218 static int uda134x_hw_params(struct snd_pcm_substream *substream,
219 struct snd_pcm_hw_params *params,
220 struct snd_soc_dai *dai)
221 {
222 struct snd_soc_pcm_runtime *rtd = substream->private_data;
223 struct snd_soc_device *socdev = rtd->socdev;
224 struct snd_soc_codec *codec = socdev->codec;
225 struct uda134x_priv *uda134x = codec->private_data;
226 u8 hw_params;
227
228 if (substream == uda134x->slave_substream) {
229 pr_debug("%s ignoring hw_params for slave substream\n",
230 __func__);
231 return 0;
232 }
233
234 hw_params = uda134x_read_reg_cache(codec, UDA134X_STATUS0);
235 hw_params &= STATUS0_SYSCLK_MASK;
236 hw_params &= STATUS0_DAIFMT_MASK;
237
238 pr_debug("%s sysclk: %d, rate:%d\n", __func__,
239 uda134x->sysclk, params_rate(params));
240
241 /* set SYSCLK / fs ratio */
242 switch (uda134x->sysclk / params_rate(params)) {
243 case 512:
244 break;
245 case 384:
246 hw_params |= (1<<4);
247 break;
248 case 256:
249 hw_params |= (1<<5);
250 break;
251 default:
252 printk(KERN_ERR "%s unsupported fs\n", __func__);
253 return -EINVAL;
254 }
255
256 pr_debug("%s dai_fmt: %d, params_format:%d\n", __func__,
257 uda134x->dai_fmt, params_format(params));
258
259 /* set DAI format and word length */
260 switch (uda134x->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
261 case SND_SOC_DAIFMT_I2S:
262 break;
263 case SND_SOC_DAIFMT_RIGHT_J:
264 switch (params_format(params)) {
265 case SNDRV_PCM_FORMAT_S16_LE:
266 hw_params |= (1<<1);
267 break;
268 case SNDRV_PCM_FORMAT_S18_3LE:
269 hw_params |= (1<<2);
270 break;
271 case SNDRV_PCM_FORMAT_S20_3LE:
272 hw_params |= ((1<<2) | (1<<1));
273 break;
274 default:
275 printk(KERN_ERR "%s unsupported format (right)\n",
276 __func__);
277 return -EINVAL;
278 }
279 break;
280 case SND_SOC_DAIFMT_LEFT_J:
281 hw_params |= (1<<3);
282 break;
283 default:
284 printk(KERN_ERR "%s unsupported format\n", __func__);
285 return -EINVAL;
286 }
287
288 uda134x_write(codec, UDA134X_STATUS0, hw_params);
289
290 return 0;
291 }
292
uda134x_set_dai_sysclk(struct snd_soc_dai * codec_dai,int clk_id,unsigned int freq,int dir)293 static int uda134x_set_dai_sysclk(struct snd_soc_dai *codec_dai,
294 int clk_id, unsigned int freq, int dir)
295 {
296 struct snd_soc_codec *codec = codec_dai->codec;
297 struct uda134x_priv *uda134x = codec->private_data;
298
299 pr_debug("%s clk_id: %d, freq: %d, dir: %d\n", __func__,
300 clk_id, freq, dir);
301
302 /* Anything between 256fs*8Khz and 512fs*48Khz should be acceptable
303 because the codec is slave. Of course limitations of the clock
304 master (the IIS controller) apply.
305 We'll error out on set_hw_params if it's not OK */
306 if ((freq >= (256 * 8000)) && (freq <= (512 * 48000))) {
307 uda134x->sysclk = freq;
308 return 0;
309 }
310
311 printk(KERN_ERR "%s unsupported sysclk\n", __func__);
312 return -EINVAL;
313 }
314
uda134x_set_dai_fmt(struct snd_soc_dai * codec_dai,unsigned int fmt)315 static int uda134x_set_dai_fmt(struct snd_soc_dai *codec_dai,
316 unsigned int fmt)
317 {
318 struct snd_soc_codec *codec = codec_dai->codec;
319 struct uda134x_priv *uda134x = codec->private_data;
320
321 pr_debug("%s fmt: %08X\n", __func__, fmt);
322
323 /* codec supports only full slave mode */
324 if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
325 printk(KERN_ERR "%s unsupported slave mode\n", __func__);
326 return -EINVAL;
327 }
328
329 /* no support for clock inversion */
330 if ((fmt & SND_SOC_DAIFMT_INV_MASK) != SND_SOC_DAIFMT_NB_NF) {
331 printk(KERN_ERR "%s unsupported clock inversion\n", __func__);
332 return -EINVAL;
333 }
334
335 /* We can't setup DAI format here as it depends on the word bit num */
336 /* so let's just store the value for later */
337 uda134x->dai_fmt = fmt;
338
339 return 0;
340 }
341
uda134x_set_bias_level(struct snd_soc_codec * codec,enum snd_soc_bias_level level)342 static int uda134x_set_bias_level(struct snd_soc_codec *codec,
343 enum snd_soc_bias_level level)
344 {
345 u8 reg;
346 struct uda134x_platform_data *pd = codec->control_data;
347 int i;
348 u8 *cache = codec->reg_cache;
349
350 pr_debug("%s bias level %d\n", __func__, level);
351
352 switch (level) {
353 case SND_SOC_BIAS_ON:
354 /* ADC, DAC on */
355 reg = uda134x_read_reg_cache(codec, UDA134X_STATUS1);
356 uda134x_write(codec, UDA134X_STATUS1, reg | 0x03);
357 break;
358 case SND_SOC_BIAS_PREPARE:
359 /* power on */
360 if (pd->power) {
361 pd->power(1);
362 /* Sync reg_cache with the hardware */
363 for (i = 0; i < ARRAY_SIZE(uda134x_reg); i++)
364 codec->write(codec, i, *cache++);
365 }
366 break;
367 case SND_SOC_BIAS_STANDBY:
368 /* ADC, DAC power off */
369 reg = uda134x_read_reg_cache(codec, UDA134X_STATUS1);
370 uda134x_write(codec, UDA134X_STATUS1, reg & ~(0x03));
371 break;
372 case SND_SOC_BIAS_OFF:
373 /* power off */
374 if (pd->power)
375 pd->power(0);
376 break;
377 }
378 codec->bias_level = level;
379 return 0;
380 }
381
382 static const char *uda134x_dsp_setting[] = {"Flat", "Minimum1",
383 "Minimum2", "Maximum"};
384 static const char *uda134x_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
385 static const char *uda134x_mixmode[] = {"Differential", "Analog1",
386 "Analog2", "Both"};
387
388 static const struct soc_enum uda134x_mixer_enum[] = {
389 SOC_ENUM_SINGLE(UDA134X_DATA010, 0, 0x04, uda134x_dsp_setting),
390 SOC_ENUM_SINGLE(UDA134X_DATA010, 3, 0x04, uda134x_deemph),
391 SOC_ENUM_SINGLE(UDA134X_EA010, 0, 0x04, uda134x_mixmode),
392 };
393
394 static const struct snd_kcontrol_new uda1341_snd_controls[] = {
395 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
396 SOC_SINGLE("Capture Volume", UDA134X_EA010, 2, 0x07, 0),
397 SOC_SINGLE("Analog1 Volume", UDA134X_EA000, 0, 0x1F, 1),
398 SOC_SINGLE("Analog2 Volume", UDA134X_EA001, 0, 0x1F, 1),
399
400 SOC_SINGLE("Mic Sensitivity", UDA134X_EA010, 2, 7, 0),
401 SOC_SINGLE("Mic Volume", UDA134X_EA101, 0, 0x1F, 0),
402
403 SOC_SINGLE("Tone Control - Bass", UDA134X_DATA001, 2, 0xF, 0),
404 SOC_SINGLE("Tone Control - Treble", UDA134X_DATA001, 0, 3, 0),
405
406 SOC_ENUM("Sound Processing Filter", uda134x_mixer_enum[0]),
407 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
408 SOC_ENUM("Input Mux", uda134x_mixer_enum[2]),
409
410 SOC_SINGLE("AGC Switch", UDA134X_EA100, 4, 1, 0),
411 SOC_SINGLE("AGC Target Volume", UDA134X_EA110, 0, 0x03, 1),
412 SOC_SINGLE("AGC Timing", UDA134X_EA110, 2, 0x07, 0),
413
414 SOC_SINGLE("DAC +6dB Switch", UDA134X_STATUS1, 6, 1, 0),
415 SOC_SINGLE("ADC +6dB Switch", UDA134X_STATUS1, 5, 1, 0),
416 SOC_SINGLE("ADC Polarity Switch", UDA134X_STATUS1, 4, 1, 0),
417 SOC_SINGLE("DAC Polarity Switch", UDA134X_STATUS1, 3, 1, 0),
418 SOC_SINGLE("Double Speed Playback Switch", UDA134X_STATUS1, 2, 1, 0),
419 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
420 };
421
422 static const struct snd_kcontrol_new uda1340_snd_controls[] = {
423 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
424
425 SOC_SINGLE("Tone Control - Bass", UDA134X_DATA001, 2, 0xF, 0),
426 SOC_SINGLE("Tone Control - Treble", UDA134X_DATA001, 0, 3, 0),
427
428 SOC_ENUM("Sound Processing Filter", uda134x_mixer_enum[0]),
429 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
430
431 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
432 };
433
uda134x_add_controls(struct snd_soc_codec * codec)434 static int uda134x_add_controls(struct snd_soc_codec *codec)
435 {
436 int err, i, n;
437 const struct snd_kcontrol_new *ctrls;
438 struct uda134x_platform_data *pd = codec->control_data;
439
440 switch (pd->model) {
441 case UDA134X_UDA1340:
442 case UDA134X_UDA1344:
443 n = ARRAY_SIZE(uda1340_snd_controls);
444 ctrls = uda1340_snd_controls;
445 break;
446 case UDA134X_UDA1341:
447 n = ARRAY_SIZE(uda1341_snd_controls);
448 ctrls = uda1341_snd_controls;
449 break;
450 default:
451 printk(KERN_ERR "%s unkown codec type: %d",
452 __func__, pd->model);
453 return -EINVAL;
454 }
455
456 for (i = 0; i < n; i++) {
457 err = snd_ctl_add(codec->card,
458 snd_soc_cnew(&ctrls[i],
459 codec, NULL));
460 if (err < 0)
461 return err;
462 }
463
464 return 0;
465 }
466
467 struct snd_soc_dai uda134x_dai = {
468 .name = "UDA134X",
469 /* playback capabilities */
470 .playback = {
471 .stream_name = "Playback",
472 .channels_min = 1,
473 .channels_max = 2,
474 .rates = UDA134X_RATES,
475 .formats = UDA134X_FORMATS,
476 },
477 /* capture capabilities */
478 .capture = {
479 .stream_name = "Capture",
480 .channels_min = 1,
481 .channels_max = 2,
482 .rates = UDA134X_RATES,
483 .formats = UDA134X_FORMATS,
484 },
485 /* pcm operations */
486 .ops = {
487 .startup = uda134x_startup,
488 .shutdown = uda134x_shutdown,
489 .hw_params = uda134x_hw_params,
490 .digital_mute = uda134x_mute,
491 .set_sysclk = uda134x_set_dai_sysclk,
492 .set_fmt = uda134x_set_dai_fmt,
493 }
494 };
495 EXPORT_SYMBOL(uda134x_dai);
496
497
uda134x_soc_probe(struct platform_device * pdev)498 static int uda134x_soc_probe(struct platform_device *pdev)
499 {
500 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
501 struct snd_soc_codec *codec;
502 struct uda134x_priv *uda134x;
503 void *codec_setup_data = socdev->codec_data;
504 int ret = -ENOMEM;
505 struct uda134x_platform_data *pd;
506
507 printk(KERN_INFO "UDA134X SoC Audio Codec\n");
508
509 if (!codec_setup_data) {
510 printk(KERN_ERR "UDA134X SoC codec: "
511 "missing L3 bitbang function\n");
512 return -ENODEV;
513 }
514
515 pd = codec_setup_data;
516 switch (pd->model) {
517 case UDA134X_UDA1340:
518 case UDA134X_UDA1341:
519 case UDA134X_UDA1344:
520 break;
521 default:
522 printk(KERN_ERR "UDA134X SoC codec: "
523 "unsupported model %d\n",
524 pd->model);
525 return -EINVAL;
526 }
527
528 socdev->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
529 if (socdev->codec == NULL)
530 return ret;
531
532 codec = socdev->codec;
533
534 uda134x = kzalloc(sizeof(struct uda134x_priv), GFP_KERNEL);
535 if (uda134x == NULL)
536 goto priv_err;
537 codec->private_data = uda134x;
538
539 codec->reg_cache = kmemdup(uda134x_reg, sizeof(uda134x_reg),
540 GFP_KERNEL);
541 if (codec->reg_cache == NULL)
542 goto reg_err;
543
544 mutex_init(&codec->mutex);
545
546 codec->reg_cache_size = sizeof(uda134x_reg);
547 codec->reg_cache_step = 1;
548
549 codec->name = "UDA134X";
550 codec->owner = THIS_MODULE;
551 codec->dai = &uda134x_dai;
552 codec->num_dai = 1;
553 codec->read = uda134x_read_reg_cache;
554 codec->write = uda134x_write;
555 #ifdef POWER_OFF_ON_STANDBY
556 codec->set_bias_level = uda134x_set_bias_level;
557 #endif
558 INIT_LIST_HEAD(&codec->dapm_widgets);
559 INIT_LIST_HEAD(&codec->dapm_paths);
560
561 codec->control_data = codec_setup_data;
562
563 if (pd->power)
564 pd->power(1);
565
566 uda134x_reset(codec);
567
568 /* register pcms */
569 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
570 if (ret < 0) {
571 printk(KERN_ERR "UDA134X: failed to register pcms\n");
572 goto pcm_err;
573 }
574
575 ret = uda134x_add_controls(codec);
576 if (ret < 0) {
577 printk(KERN_ERR "UDA134X: failed to register controls\n");
578 goto pcm_err;
579 }
580
581 ret = snd_soc_init_card(socdev);
582 if (ret < 0) {
583 printk(KERN_ERR "UDA134X: failed to register card\n");
584 goto card_err;
585 }
586
587 return 0;
588
589 card_err:
590 snd_soc_free_pcms(socdev);
591 snd_soc_dapm_free(socdev);
592 pcm_err:
593 kfree(codec->reg_cache);
594 reg_err:
595 kfree(codec->private_data);
596 priv_err:
597 kfree(codec);
598 return ret;
599 }
600
601 /* power down chip */
uda134x_soc_remove(struct platform_device * pdev)602 static int uda134x_soc_remove(struct platform_device *pdev)
603 {
604 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
605 struct snd_soc_codec *codec = socdev->codec;
606
607 uda134x_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
608 uda134x_set_bias_level(codec, SND_SOC_BIAS_OFF);
609
610 snd_soc_free_pcms(socdev);
611 snd_soc_dapm_free(socdev);
612
613 kfree(codec->private_data);
614 kfree(codec->reg_cache);
615 kfree(codec);
616
617 return 0;
618 }
619
620 #if defined(CONFIG_PM)
uda134x_soc_suspend(struct platform_device * pdev,pm_message_t state)621 static int uda134x_soc_suspend(struct platform_device *pdev,
622 pm_message_t state)
623 {
624 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
625 struct snd_soc_codec *codec = socdev->codec;
626
627 uda134x_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
628 uda134x_set_bias_level(codec, SND_SOC_BIAS_OFF);
629 return 0;
630 }
631
uda134x_soc_resume(struct platform_device * pdev)632 static int uda134x_soc_resume(struct platform_device *pdev)
633 {
634 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
635 struct snd_soc_codec *codec = socdev->codec;
636
637 uda134x_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
638 uda134x_set_bias_level(codec, SND_SOC_BIAS_ON);
639 return 0;
640 }
641 #else
642 #define uda134x_soc_suspend NULL
643 #define uda134x_soc_resume NULL
644 #endif /* CONFIG_PM */
645
646 struct snd_soc_codec_device soc_codec_dev_uda134x = {
647 .probe = uda134x_soc_probe,
648 .remove = uda134x_soc_remove,
649 .suspend = uda134x_soc_suspend,
650 .resume = uda134x_soc_resume,
651 };
652 EXPORT_SYMBOL_GPL(soc_codec_dev_uda134x);
653
uda134x_init(void)654 static int __init uda134x_init(void)
655 {
656 return snd_soc_register_dai(&uda134x_dai);
657 }
658 module_init(uda134x_init);
659
uda134x_exit(void)660 static void __exit uda134x_exit(void)
661 {
662 snd_soc_unregister_dai(&uda134x_dai);
663 }
664 module_exit(uda134x_exit);
665
666 MODULE_DESCRIPTION("UDA134X ALSA soc codec driver");
667 MODULE_AUTHOR("Zoltan Devai, Christian Pellegrin <chripell@evolware.org>");
668 MODULE_LICENSE("GPL");
669