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-rw-r--r--sound/soc/codecs/ad1938.c682
1 files changed, 682 insertions, 0 deletions
diff --git a/sound/soc/codecs/ad1938.c b/sound/soc/codecs/ad1938.c
new file mode 100644
index 000000000000..e62b27701a49
--- /dev/null
+++ b/sound/soc/codecs/ad1938.c
@@ -0,0 +1,682 @@
1/*
2 * File: sound/soc/codecs/ad1938.c
3 * Author: Barry Song <Barry.Song@analog.com>
4 *
5 * Created: June 04 2009
6 * Description: Driver for AD1938 sound chip
7 *
8 * Modified:
9 * Copyright 2009 Analog Devices Inc.
10 *
11 * Bugs: Enter bugs at http://blackfin.uclinux.org/
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, see the file COPYING, or write
25 * to the Free Software Foundation, Inc.,
26 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
27 */
28
29#include <linux/init.h>
30#include <linux/module.h>
31#include <linux/version.h>
32#include <linux/kernel.h>
33#include <linux/device.h>
34#include <sound/core.h>
35#include <sound/pcm.h>
36#include <sound/pcm_params.h>
37#include <sound/initval.h>
38#include <sound/soc.h>
39#include <sound/tlv.h>
40#include <sound/soc-dapm.h>
41#include <linux/spi/spi.h>
42#include "ad1938.h"
43
44/* codec private data */
45struct ad1938_priv {
46 struct snd_soc_codec codec;
47 u8 reg_cache[AD1938_NUM_REGS];
48};
49
50static struct snd_soc_codec *ad1938_codec;
51struct snd_soc_codec_device soc_codec_dev_ad1938;
52static int ad1938_register(struct ad1938_priv *ad1938);
53static void ad1938_unregister(struct ad1938_priv *ad1938);
54
55/*
56 * AD1938 volume/mute/de-emphasis etc. controls
57 */
58static const char *ad1938_deemp[] = {"None", "48kHz", "44.1kHz", "32kHz"};
59
60static const struct soc_enum ad1938_deemp_enum =
61 SOC_ENUM_SINGLE(AD1938_DAC_CTRL2, 1, 4, ad1938_deemp);
62
63static const struct snd_kcontrol_new ad1938_snd_controls[] = {
64 /* DAC volume control */
65 SOC_DOUBLE_R("DAC1 Volume", AD1938_DAC_L1_VOL,
66 AD1938_DAC_R1_VOL, 0, 0xFF, 1),
67 SOC_DOUBLE_R("DAC2 Volume", AD1938_DAC_L2_VOL,
68 AD1938_DAC_R2_VOL, 0, 0xFF, 1),
69 SOC_DOUBLE_R("DAC3 Volume", AD1938_DAC_L3_VOL,
70 AD1938_DAC_R3_VOL, 0, 0xFF, 1),
71 SOC_DOUBLE_R("DAC4 Volume", AD1938_DAC_L4_VOL,
72 AD1938_DAC_R4_VOL, 0, 0xFF, 1),
73
74 /* ADC switch control */
75 SOC_DOUBLE("ADC1 Switch", AD1938_ADC_CTRL0, AD1938_ADCL1_MUTE,
76 AD1938_ADCR1_MUTE, 1, 1),
77 SOC_DOUBLE("ADC2 Switch", AD1938_ADC_CTRL0, AD1938_ADCL2_MUTE,
78 AD1938_ADCR2_MUTE, 1, 1),
79
80 /* DAC switch control */
81 SOC_DOUBLE("DAC1 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL1_MUTE,
82 AD1938_DACR1_MUTE, 1, 1),
83 SOC_DOUBLE("DAC2 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL2_MUTE,
84 AD1938_DACR2_MUTE, 1, 1),
85 SOC_DOUBLE("DAC3 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL3_MUTE,
86 AD1938_DACR3_MUTE, 1, 1),
87 SOC_DOUBLE("DAC4 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL4_MUTE,
88 AD1938_DACR4_MUTE, 1, 1),
89
90 /* ADC high-pass filter */
91 SOC_SINGLE("ADC High Pass Filter Switch", AD1938_ADC_CTRL0,
92 AD1938_ADC_HIGHPASS_FILTER, 1, 0),
93
94 /* DAC de-emphasis */
95 SOC_ENUM("Playback Deemphasis", ad1938_deemp_enum),
96};
97
98static const struct snd_soc_dapm_widget ad1938_dapm_widgets[] = {
99 SND_SOC_DAPM_DAC("DAC", "Playback", AD1938_DAC_CTRL0, 0, 1),
100 SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
101 SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1938_ADC_CTRL0, 0, 1, NULL, 0),
102 SND_SOC_DAPM_OUTPUT("DAC1OUT"),
103 SND_SOC_DAPM_OUTPUT("DAC2OUT"),
104 SND_SOC_DAPM_OUTPUT("DAC3OUT"),
105 SND_SOC_DAPM_OUTPUT("DAC4OUT"),
106 SND_SOC_DAPM_INPUT("ADC1IN"),
107 SND_SOC_DAPM_INPUT("ADC2IN"),
108};
109
110static const struct snd_soc_dapm_route audio_paths[] = {
111 { "DAC", NULL, "ADC_PWR" },
112 { "ADC", NULL, "ADC_PWR" },
113 { "DAC1OUT", "DAC1 Switch", "DAC" },
114 { "DAC2OUT", "DAC2 Switch", "DAC" },
115 { "DAC3OUT", "DAC3 Switch", "DAC" },
116 { "DAC4OUT", "DAC4 Switch", "DAC" },
117 { "ADC", "ADC1 Switch", "ADC1IN" },
118 { "ADC", "ADC2 Switch", "ADC2IN" },
119};
120
121/*
122 * DAI ops entries
123 */
124
125static int ad1938_mute(struct snd_soc_dai *dai, int mute)
126{
127 struct snd_soc_codec *codec = dai->codec;
128 int reg;
129
130 reg = codec->read(codec, AD1938_DAC_CTRL2);
131 reg = (mute > 0) ? reg | AD1938_DAC_MASTER_MUTE : reg &
132 (~AD1938_DAC_MASTER_MUTE);
133 codec->write(codec, AD1938_DAC_CTRL2, reg);
134
135 return 0;
136}
137
138static inline int ad1938_pll_powerctrl(struct snd_soc_codec *codec, int cmd)
139{
140 int reg = codec->read(codec, AD1938_PLL_CLK_CTRL0);
141 reg = (cmd > 0) ? reg & (~AD1938_PLL_POWERDOWN) : reg |
142 AD1938_PLL_POWERDOWN;
143 codec->write(codec, AD1938_PLL_CLK_CTRL0, reg);
144
145 return 0;
146}
147
148static int ad1938_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
149 unsigned int mask, int slots, int width)
150{
151 struct snd_soc_codec *codec = dai->codec;
152 int dac_reg = codec->read(codec, AD1938_DAC_CTRL1);
153 int adc_reg = codec->read(codec, AD1938_ADC_CTRL2);
154
155 dac_reg &= ~AD1938_DAC_CHAN_MASK;
156 adc_reg &= ~AD1938_ADC_CHAN_MASK;
157
158 switch (slots) {
159 case 2:
160 dac_reg |= AD1938_DAC_2_CHANNELS << AD1938_DAC_CHAN_SHFT;
161 adc_reg |= AD1938_ADC_2_CHANNELS << AD1938_ADC_CHAN_SHFT;
162 break;
163 case 4:
164 dac_reg |= AD1938_DAC_4_CHANNELS << AD1938_DAC_CHAN_SHFT;
165 adc_reg |= AD1938_ADC_4_CHANNELS << AD1938_ADC_CHAN_SHFT;
166 break;
167 case 8:
168 dac_reg |= AD1938_DAC_8_CHANNELS << AD1938_DAC_CHAN_SHFT;
169 adc_reg |= AD1938_ADC_8_CHANNELS << AD1938_ADC_CHAN_SHFT;
170 break;
171 case 16:
172 dac_reg |= AD1938_DAC_16_CHANNELS << AD1938_DAC_CHAN_SHFT;
173 adc_reg |= AD1938_ADC_16_CHANNELS << AD1938_ADC_CHAN_SHFT;
174 break;
175 default:
176 return -EINVAL;
177 }
178
179 codec->write(codec, AD1938_DAC_CTRL1, dac_reg);
180 codec->write(codec, AD1938_ADC_CTRL2, adc_reg);
181
182 return 0;
183}
184
185static int ad1938_set_dai_fmt(struct snd_soc_dai *codec_dai,
186 unsigned int fmt)
187{
188 struct snd_soc_codec *codec = codec_dai->codec;
189 int adc_reg, dac_reg;
190
191 adc_reg = codec->read(codec, AD1938_ADC_CTRL2);
192 dac_reg = codec->read(codec, AD1938_DAC_CTRL1);
193
194 /* At present, the driver only support AUX ADC mode(SND_SOC_DAIFMT_I2S
195 * with TDM) and ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A)
196 */
197 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
198 case SND_SOC_DAIFMT_I2S:
199 adc_reg &= ~AD1938_ADC_SERFMT_MASK;
200 adc_reg |= AD1938_ADC_SERFMT_TDM;
201 break;
202 case SND_SOC_DAIFMT_DSP_A:
203 adc_reg &= ~AD1938_ADC_SERFMT_MASK;
204 adc_reg |= AD1938_ADC_SERFMT_AUX;
205 break;
206 default:
207 return -EINVAL;
208 }
209
210 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
211 case SND_SOC_DAIFMT_NB_NF: /* normal bit clock + frame */
212 adc_reg &= ~AD1938_ADC_LEFT_HIGH;
213 adc_reg &= ~AD1938_ADC_BCLK_INV;
214 dac_reg &= ~AD1938_DAC_LEFT_HIGH;
215 dac_reg &= ~AD1938_DAC_BCLK_INV;
216 break;
217 case SND_SOC_DAIFMT_NB_IF: /* normal bclk + invert frm */
218 adc_reg |= AD1938_ADC_LEFT_HIGH;
219 adc_reg &= ~AD1938_ADC_BCLK_INV;
220 dac_reg |= AD1938_DAC_LEFT_HIGH;
221 dac_reg &= ~AD1938_DAC_BCLK_INV;
222 break;
223 case SND_SOC_DAIFMT_IB_NF: /* invert bclk + normal frm */
224 adc_reg &= ~AD1938_ADC_LEFT_HIGH;
225 adc_reg |= AD1938_ADC_BCLK_INV;
226 dac_reg &= ~AD1938_DAC_LEFT_HIGH;
227 dac_reg |= AD1938_DAC_BCLK_INV;
228 break;
229
230 case SND_SOC_DAIFMT_IB_IF: /* invert bclk + frm */
231 adc_reg |= AD1938_ADC_LEFT_HIGH;
232 adc_reg |= AD1938_ADC_BCLK_INV;
233 dac_reg |= AD1938_DAC_LEFT_HIGH;
234 dac_reg |= AD1938_DAC_BCLK_INV;
235 break;
236 default:
237 return -EINVAL;
238 }
239
240 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
241 case SND_SOC_DAIFMT_CBM_CFM: /* codec clk & frm master */
242 adc_reg |= AD1938_ADC_LCR_MASTER;
243 adc_reg |= AD1938_ADC_BCLK_MASTER;
244 dac_reg |= AD1938_DAC_LCR_MASTER;
245 dac_reg |= AD1938_DAC_BCLK_MASTER;
246 break;
247 case SND_SOC_DAIFMT_CBS_CFM: /* codec clk slave & frm master */
248 adc_reg |= AD1938_ADC_LCR_MASTER;
249 adc_reg &= ~AD1938_ADC_BCLK_MASTER;
250 dac_reg |= AD1938_DAC_LCR_MASTER;
251 dac_reg &= ~AD1938_DAC_BCLK_MASTER;
252 break;
253 case SND_SOC_DAIFMT_CBM_CFS: /* codec clk master & frame slave */
254 adc_reg &= ~AD1938_ADC_LCR_MASTER;
255 adc_reg |= AD1938_ADC_BCLK_MASTER;
256 dac_reg &= ~AD1938_DAC_LCR_MASTER;
257 dac_reg |= AD1938_DAC_BCLK_MASTER;
258 break;
259 case SND_SOC_DAIFMT_CBS_CFS: /* codec clk & frm slave */
260 adc_reg &= ~AD1938_ADC_LCR_MASTER;
261 adc_reg &= ~AD1938_ADC_BCLK_MASTER;
262 dac_reg &= ~AD1938_DAC_LCR_MASTER;
263 dac_reg &= ~AD1938_DAC_BCLK_MASTER;
264 break;
265 default:
266 return -EINVAL;
267 }
268
269 codec->write(codec, AD1938_ADC_CTRL2, adc_reg);
270 codec->write(codec, AD1938_DAC_CTRL1, dac_reg);
271
272 return 0;
273}
274
275static int ad1938_hw_params(struct snd_pcm_substream *substream,
276 struct snd_pcm_hw_params *params,
277 struct snd_soc_dai *dai)
278{
279 int word_len = 0, reg = 0;
280
281 struct snd_soc_pcm_runtime *rtd = substream->private_data;
282 struct snd_soc_device *socdev = rtd->socdev;
283 struct snd_soc_codec *codec = socdev->card->codec;
284
285 /* bit size */
286 switch (params_format(params)) {
287 case SNDRV_PCM_FORMAT_S16_LE:
288 word_len = 3;
289 break;
290 case SNDRV_PCM_FORMAT_S20_3LE:
291 word_len = 1;
292 break;
293 case SNDRV_PCM_FORMAT_S24_LE:
294 case SNDRV_PCM_FORMAT_S32_LE:
295 word_len = 0;
296 break;
297 }
298
299 reg = codec->read(codec, AD1938_DAC_CTRL2);
300 reg = (reg & (~AD1938_DAC_WORD_LEN_MASK)) | word_len;
301 codec->write(codec, AD1938_DAC_CTRL2, reg);
302
303 reg = codec->read(codec, AD1938_ADC_CTRL1);
304 reg = (reg & (~AD1938_ADC_WORD_LEN_MASK)) | word_len;
305 codec->write(codec, AD1938_ADC_CTRL1, reg);
306
307 return 0;
308}
309
310static int ad1938_set_bias_level(struct snd_soc_codec *codec,
311 enum snd_soc_bias_level level)
312{
313 switch (level) {
314 case SND_SOC_BIAS_ON:
315 ad1938_pll_powerctrl(codec, 1);
316 break;
317 case SND_SOC_BIAS_PREPARE:
318 break;
319 case SND_SOC_BIAS_STANDBY:
320 case SND_SOC_BIAS_OFF:
321 ad1938_pll_powerctrl(codec, 0);
322 break;
323 }
324 codec->bias_level = level;
325 return 0;
326}
327
328/*
329 * interface to read/write ad1938 register
330 */
331
332#define AD1938_SPI_ADDR 0x4
333#define AD1938_SPI_READ 0x1
334#define AD1938_SPI_BUFLEN 3
335
336/*
337 * write to the ad1938 register space
338 */
339
340static int ad1938_write_reg(struct snd_soc_codec *codec, unsigned int reg,
341 unsigned int value)
342{
343 u8 *reg_cache = codec->reg_cache;
344 int ret = 0;
345
346 if (value != reg_cache[reg]) {
347 uint8_t buf[AD1938_SPI_BUFLEN];
348 struct spi_transfer t = {
349 .tx_buf = buf,
350 .len = AD1938_SPI_BUFLEN,
351 };
352 struct spi_message m;
353
354 buf[0] = AD1938_SPI_ADDR << 1;
355 buf[1] = reg;
356 buf[2] = value;
357 spi_message_init(&m);
358 spi_message_add_tail(&t, &m);
359 ret = spi_sync(codec->control_data, &m);
360 if (ret == 0)
361 reg_cache[reg] = value;
362 }
363
364 return ret;
365}
366
367/*
368 * read from the ad1938 register space cache
369 */
370
371static unsigned int ad1938_read_reg_cache(struct snd_soc_codec *codec,
372 unsigned int reg)
373{
374 u8 *reg_cache = codec->reg_cache;
375
376 if (reg >= codec->reg_cache_size)
377 return -EINVAL;
378
379 return reg_cache[reg];
380}
381
382/*
383 * read from the ad1938 register space
384 */
385
386static unsigned int ad1938_read_reg(struct snd_soc_codec *codec,
387 unsigned int reg)
388{
389 char w_buf[AD1938_SPI_BUFLEN];
390 char r_buf[AD1938_SPI_BUFLEN];
391 int ret;
392
393 struct spi_transfer t = {
394 .tx_buf = w_buf,
395 .rx_buf = r_buf,
396 .len = AD1938_SPI_BUFLEN,
397 };
398 struct spi_message m;
399
400 w_buf[0] = (AD1938_SPI_ADDR << 1) | AD1938_SPI_READ;
401 w_buf[1] = reg;
402 w_buf[2] = 0;
403
404 spi_message_init(&m);
405 spi_message_add_tail(&t, &m);
406 ret = spi_sync(codec->control_data, &m);
407 if (ret == 0)
408 return r_buf[2];
409 else
410 return -EIO;
411}
412
413static int ad1938_fill_cache(struct snd_soc_codec *codec)
414{
415 int i;
416 u8 *reg_cache = codec->reg_cache;
417 struct spi_device *spi = codec->control_data;
418
419 for (i = 0; i < codec->reg_cache_size; i++) {
420 int ret = ad1938_read_reg(codec, i);
421 if (ret == -EIO) {
422 dev_err(&spi->dev, "AD1938 SPI read failure\n");
423 return ret;
424 }
425 reg_cache[i] = ret;
426 }
427
428 return 0;
429}
430
431static int __devinit ad1938_spi_probe(struct spi_device *spi)
432{
433 struct snd_soc_codec *codec;
434 struct ad1938_priv *ad1938;
435
436 ad1938 = kzalloc(sizeof(struct ad1938_priv), GFP_KERNEL);
437 if (ad1938 == NULL)
438 return -ENOMEM;
439
440 codec = &ad1938->codec;
441 codec->control_data = spi;
442 codec->dev = &spi->dev;
443
444 dev_set_drvdata(&spi->dev, ad1938);
445
446 return ad1938_register(ad1938);
447}
448
449static int __devexit ad1938_spi_remove(struct spi_device *spi)
450{
451 struct ad1938_priv *ad1938 = dev_get_drvdata(&spi->dev);
452
453 ad1938_unregister(ad1938);
454 return 0;
455}
456
457static struct spi_driver ad1938_spi_driver = {
458 .driver = {
459 .name = "ad1938",
460 .bus = &spi_bus_type,
461 .owner = THIS_MODULE,
462 },
463 .probe = ad1938_spi_probe,
464 .remove = __devexit_p(ad1938_spi_remove),
465};
466
467static struct snd_soc_dai_ops ad1938_dai_ops = {
468 .hw_params = ad1938_hw_params,
469 .digital_mute = ad1938_mute,
470 .set_tdm_slot = ad1938_set_tdm_slot,
471 .set_fmt = ad1938_set_dai_fmt,
472};
473
474/* codec DAI instance */
475struct snd_soc_dai ad1938_dai = {
476 .name = "AD1938",
477 .playback = {
478 .stream_name = "Playback",
479 .channels_min = 2,
480 .channels_max = 8,
481 .rates = SNDRV_PCM_RATE_48000,
482 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
483 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
484 },
485 .capture = {
486 .stream_name = "Capture",
487 .channels_min = 2,
488 .channels_max = 4,
489 .rates = SNDRV_PCM_RATE_48000,
490 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
491 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
492 },
493 .ops = &ad1938_dai_ops,
494};
495EXPORT_SYMBOL_GPL(ad1938_dai);
496
497static int ad1938_register(struct ad1938_priv *ad1938)
498{
499 int ret;
500 struct snd_soc_codec *codec = &ad1938->codec;
501
502 if (ad1938_codec) {
503 dev_err(codec->dev, "Another ad1938 is registered\n");
504 return -EINVAL;
505 }
506
507 mutex_init(&codec->mutex);
508 INIT_LIST_HEAD(&codec->dapm_widgets);
509 INIT_LIST_HEAD(&codec->dapm_paths);
510 codec->private_data = ad1938;
511 codec->reg_cache = ad1938->reg_cache;
512 codec->reg_cache_size = AD1938_NUM_REGS;
513 codec->name = "AD1938";
514 codec->owner = THIS_MODULE;
515 codec->dai = &ad1938_dai;
516 codec->num_dai = 1;
517 codec->write = ad1938_write_reg;
518 codec->read = ad1938_read_reg_cache;
519 INIT_LIST_HEAD(&codec->dapm_widgets);
520 INIT_LIST_HEAD(&codec->dapm_paths);
521
522 ad1938_dai.dev = codec->dev;
523 ad1938_codec = codec;
524
525 /* default setting for ad1938 */
526
527 /* unmute dac channels */
528 codec->write(codec, AD1938_DAC_CHNL_MUTE, 0x0);
529 /* de-emphasis: 48kHz, powedown dac */
530 codec->write(codec, AD1938_DAC_CTRL2, 0x1A);
531 /* powerdown dac, dac in tdm mode */
532 codec->write(codec, AD1938_DAC_CTRL0, 0x41);
533 /* high-pass filter enable */
534 codec->write(codec, AD1938_ADC_CTRL0, 0x3);
535 /* sata delay=1, adc aux mode */
536 codec->write(codec, AD1938_ADC_CTRL1, 0x43);
537 /* pll input: mclki/xi */
538 codec->write(codec, AD1938_PLL_CLK_CTRL0, 0x9D);
539 codec->write(codec, AD1938_PLL_CLK_CTRL1, 0x04);
540
541 ad1938_fill_cache(codec);
542
543 ret = snd_soc_register_codec(codec);
544 if (ret != 0) {
545 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
546 kfree(ad1938);
547 return ret;
548 }
549
550 ret = snd_soc_register_dai(&ad1938_dai);
551 if (ret != 0) {
552 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
553 snd_soc_unregister_codec(codec);
554 kfree(ad1938);
555 return ret;
556 }
557
558 return 0;
559}
560
561static void ad1938_unregister(struct ad1938_priv *ad1938)
562{
563 ad1938_set_bias_level(&ad1938->codec, SND_SOC_BIAS_OFF);
564 snd_soc_unregister_dai(&ad1938_dai);
565 snd_soc_unregister_codec(&ad1938->codec);
566 kfree(ad1938);
567 ad1938_codec = NULL;
568}
569
570static int ad1938_probe(struct platform_device *pdev)
571{
572 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
573 struct snd_soc_codec *codec;
574 int ret = 0;
575
576 if (ad1938_codec == NULL) {
577 dev_err(&pdev->dev, "Codec device not registered\n");
578 return -ENODEV;
579 }
580
581 socdev->card->codec = ad1938_codec;
582 codec = ad1938_codec;
583
584 /* register pcms */
585 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
586 if (ret < 0) {
587 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
588 goto pcm_err;
589 }
590
591 snd_soc_add_controls(codec, ad1938_snd_controls,
592 ARRAY_SIZE(ad1938_snd_controls));
593 snd_soc_dapm_new_controls(codec, ad1938_dapm_widgets,
594 ARRAY_SIZE(ad1938_dapm_widgets));
595 snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));
596 snd_soc_dapm_new_widgets(codec);
597
598 ad1938_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
599
600 ret = snd_soc_init_card(socdev);
601 if (ret < 0) {
602 dev_err(codec->dev, "failed to register card: %d\n", ret);
603 goto card_err;
604 }
605
606 return ret;
607
608card_err:
609 snd_soc_free_pcms(socdev);
610 snd_soc_dapm_free(socdev);
611pcm_err:
612 return ret;
613}
614
615/* power down chip */
616static int ad1938_remove(struct platform_device *pdev)
617{
618 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
619
620 snd_soc_free_pcms(socdev);
621 snd_soc_dapm_free(socdev);
622
623 return 0;
624}
625
626#ifdef CONFIG_PM
627static int ad1938_suspend(struct platform_device *pdev,
628 pm_message_t state)
629{
630 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
631 struct snd_soc_codec *codec = socdev->card->codec;
632
633 ad1938_set_bias_level(codec, SND_SOC_BIAS_OFF);
634 return 0;
635}
636
637static int ad1938_resume(struct platform_device *pdev)
638{
639 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
640 struct snd_soc_codec *codec = socdev->card->codec;
641
642 if (codec->suspend_bias_level == SND_SOC_BIAS_ON)
643 ad1938_set_bias_level(codec, SND_SOC_BIAS_ON);
644
645 return 0;
646}
647#else
648#define ad1938_suspend NULL
649#define ad1938_resume NULL
650#endif
651
652struct snd_soc_codec_device soc_codec_dev_ad1938 = {
653 .probe = ad1938_probe,
654 .remove = ad1938_remove,
655 .suspend = ad1938_suspend,
656 .resume = ad1938_resume,
657};
658EXPORT_SYMBOL_GPL(soc_codec_dev_ad1938);
659
660static int __init ad1938_init(void)
661{
662 int ret;
663
664 ret = spi_register_driver(&ad1938_spi_driver);
665 if (ret != 0) {
666 printk(KERN_ERR "Failed to register ad1938 SPI driver: %d\n",
667 ret);
668 }
669
670 return ret;
671}
672module_init(ad1938_init);
673
674static void __exit ad1938_exit(void)
675{
676 spi_unregister_driver(&ad1938_spi_driver);
677}
678module_exit(ad1938_exit);
679
680MODULE_DESCRIPTION("ASoC ad1938 driver");
681MODULE_AUTHOR("Barry Song ");
682MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-22 22:43:17 -0500