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13#include <linux/module.h>
14#include <linux/moduleparam.h>
15#include <linux/init.h>
16#include <linux/delay.h>
17#include <linux/pm.h>
18#include <linux/i2c.h>
19#include <linux/platform_device.h>
20#include <linux/spi/spi.h>
21#include <sound/core.h>
22#include <sound/pcm.h>
23#include <sound/pcm_params.h>
24#include <sound/soc.h>
25#include <sound/soc-dapm.h>
26#include <sound/initval.h>
27#include <sound/tlv.h>
28
29#include "wm8728.h"
30
31struct snd_soc_codec_device soc_codec_dev_wm8728;
32
33
34
35
36
37
38
39static const u16 wm8728_reg_defaults[] = {
40 0x1ff,
41 0x1ff,
42 0x001,
43 0x100,
44};
45
46static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1);
47
48static const struct snd_kcontrol_new wm8728_snd_controls[] = {
49
50SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL,
51 0, 255, 0, wm8728_tlv),
52
53SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0),
54};
55
56
57
58
59static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = {
60SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0),
61SND_SOC_DAPM_OUTPUT("VOUTL"),
62SND_SOC_DAPM_OUTPUT("VOUTR"),
63};
64
65static const struct snd_soc_dapm_route intercon[] = {
66 {"VOUTL", NULL, "DAC"},
67 {"VOUTR", NULL, "DAC"},
68};
69
70static int wm8728_add_widgets(struct snd_soc_codec *codec)
71{
72 snd_soc_dapm_new_controls(codec, wm8728_dapm_widgets,
73 ARRAY_SIZE(wm8728_dapm_widgets));
74
75 snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
76
77 snd_soc_dapm_new_widgets(codec);
78
79 return 0;
80}
81
82static int wm8728_mute(struct snd_soc_dai *dai, int mute)
83{
84 struct snd_soc_codec *codec = dai->codec;
85 u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL);
86
87 if (mute)
88 snd_soc_write(codec, WM8728_DACCTL, mute_reg | 1);
89 else
90 snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1);
91
92 return 0;
93}
94
95static int wm8728_hw_params(struct snd_pcm_substream *substream,
96 struct snd_pcm_hw_params *params,
97 struct snd_soc_dai *dai)
98{
99 struct snd_soc_pcm_runtime *rtd = substream->private_data;
100 struct snd_soc_device *socdev = rtd->socdev;
101 struct snd_soc_codec *codec = socdev->card->codec;
102 u16 dac = snd_soc_read(codec, WM8728_DACCTL);
103
104 dac &= ~0x18;
105
106 switch (params_format(params)) {
107 case SNDRV_PCM_FORMAT_S16_LE:
108 break;
109 case SNDRV_PCM_FORMAT_S20_3LE:
110 dac |= 0x10;
111 break;
112 case SNDRV_PCM_FORMAT_S24_LE:
113 dac |= 0x08;
114 break;
115 default:
116 return -EINVAL;
117 }
118
119 snd_soc_write(codec, WM8728_DACCTL, dac);
120
121 return 0;
122}
123
124static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai,
125 unsigned int fmt)
126{
127 struct snd_soc_codec *codec = codec_dai->codec;
128 u16 iface = snd_soc_read(codec, WM8728_IFCTL);
129
130
131
132
133 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
134 case SND_SOC_DAIFMT_I2S:
135 iface |= 1;
136 break;
137 default:
138 return -EINVAL;
139 }
140
141
142 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
143 case SND_SOC_DAIFMT_CBS_CFS:
144 break;
145 default:
146 return -EINVAL;
147 }
148
149 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
150 case SND_SOC_DAIFMT_NB_NF:
151 iface &= ~0x22;
152 break;
153 case SND_SOC_DAIFMT_IB_NF:
154 iface |= 0x20;
155 iface &= ~0x02;
156 break;
157 case SND_SOC_DAIFMT_NB_IF:
158 iface |= 0x02;
159 iface &= ~0x20;
160 break;
161 case SND_SOC_DAIFMT_IB_IF:
162 iface |= 0x22;
163 break;
164 default:
165 return -EINVAL;
166 }
167
168 snd_soc_write(codec, WM8728_IFCTL, iface);
169 return 0;
170}
171
172static int wm8728_set_bias_level(struct snd_soc_codec *codec,
173 enum snd_soc_bias_level level)
174{
175 u16 reg;
176 int i;
177
178 switch (level) {
179 case SND_SOC_BIAS_ON:
180 case SND_SOC_BIAS_PREPARE:
181 case SND_SOC_BIAS_STANDBY:
182 if (codec->bias_level == SND_SOC_BIAS_OFF) {
183
184 reg = snd_soc_read(codec, WM8728_DACCTL);
185 snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4);
186
187
188 for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++)
189 snd_soc_write(codec, i,
190 snd_soc_read(codec, i));
191 }
192 break;
193
194 case SND_SOC_BIAS_OFF:
195 reg = snd_soc_read(codec, WM8728_DACCTL);
196 snd_soc_write(codec, WM8728_DACCTL, reg | 0x4);
197 break;
198 }
199 codec->bias_level = level;
200 return 0;
201}
202
203#define WM8728_RATES (SNDRV_PCM_RATE_8000_192000)
204
205#define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
206 SNDRV_PCM_FMTBIT_S24_LE)
207
208static struct snd_soc_dai_ops wm8728_dai_ops = {
209 .hw_params = wm8728_hw_params,
210 .digital_mute = wm8728_mute,
211 .set_fmt = wm8728_set_dai_fmt,
212};
213
214struct snd_soc_dai wm8728_dai = {
215 .name = "WM8728",
216 .playback = {
217 .stream_name = "Playback",
218 .channels_min = 2,
219 .channels_max = 2,
220 .rates = WM8728_RATES,
221 .formats = WM8728_FORMATS,
222 },
223 .ops = &wm8728_dai_ops,
224};
225EXPORT_SYMBOL_GPL(wm8728_dai);
226
227static int wm8728_suspend(struct platform_device *pdev, pm_message_t state)
228{
229 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
230 struct snd_soc_codec *codec = socdev->card->codec;
231
232 wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
233
234 return 0;
235}
236
237static int wm8728_resume(struct platform_device *pdev)
238{
239 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
240 struct snd_soc_codec *codec = socdev->card->codec;
241
242 wm8728_set_bias_level(codec, codec->suspend_bias_level);
243
244 return 0;
245}
246
247
248
249
250
251static int wm8728_init(struct snd_soc_device *socdev,
252 enum snd_soc_control_type control)
253{
254 struct snd_soc_codec *codec = socdev->card->codec;
255 int ret = 0;
256
257 codec->name = "WM8728";
258 codec->owner = THIS_MODULE;
259 codec->set_bias_level = wm8728_set_bias_level;
260 codec->dai = &wm8728_dai;
261 codec->num_dai = 1;
262 codec->bias_level = SND_SOC_BIAS_OFF;
263 codec->reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults);
264 codec->reg_cache = kmemdup(wm8728_reg_defaults,
265 sizeof(wm8728_reg_defaults),
266 GFP_KERNEL);
267 if (codec->reg_cache == NULL)
268 return -ENOMEM;
269
270 ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
271 if (ret < 0) {
272 printk(KERN_ERR "wm8728: failed to configure cache I/O: %d\n",
273 ret);
274 goto err;
275 }
276
277
278 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
279 if (ret < 0) {
280 printk(KERN_ERR "wm8728: failed to create pcms\n");
281 goto err;
282 }
283
284
285 wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
286
287 snd_soc_add_controls(codec, wm8728_snd_controls,
288 ARRAY_SIZE(wm8728_snd_controls));
289 wm8728_add_widgets(codec);
290 ret = snd_soc_init_card(socdev);
291 if (ret < 0) {
292 printk(KERN_ERR "wm8728: failed to register card\n");
293 goto card_err;
294 }
295
296 return ret;
297
298card_err:
299 snd_soc_free_pcms(socdev);
300 snd_soc_dapm_free(socdev);
301err:
302 kfree(codec->reg_cache);
303 return ret;
304}
305
306static struct snd_soc_device *wm8728_socdev;
307
308#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
309
310
311
312
313
314
315
316
317static int wm8728_i2c_probe(struct i2c_client *i2c,
318 const struct i2c_device_id *id)
319{
320 struct snd_soc_device *socdev = wm8728_socdev;
321 struct snd_soc_codec *codec = socdev->card->codec;
322 int ret;
323
324 i2c_set_clientdata(i2c, codec);
325 codec->control_data = i2c;
326
327 ret = wm8728_init(socdev, SND_SOC_I2C);
328 if (ret < 0)
329 pr_err("failed to initialise WM8728\n");
330
331 return ret;
332}
333
334static int wm8728_i2c_remove(struct i2c_client *client)
335{
336 struct snd_soc_codec *codec = i2c_get_clientdata(client);
337 kfree(codec->reg_cache);
338 return 0;
339}
340
341static const struct i2c_device_id wm8728_i2c_id[] = {
342 { "wm8728", 0 },
343 { }
344};
345MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id);
346
347static struct i2c_driver wm8728_i2c_driver = {
348 .driver = {
349 .name = "WM8728 I2C Codec",
350 .owner = THIS_MODULE,
351 },
352 .probe = wm8728_i2c_probe,
353 .remove = wm8728_i2c_remove,
354 .id_table = wm8728_i2c_id,
355};
356
357static int wm8728_add_i2c_device(struct platform_device *pdev,
358 const struct wm8728_setup_data *setup)
359{
360 struct i2c_board_info info;
361 struct i2c_adapter *adapter;
362 struct i2c_client *client;
363 int ret;
364
365 ret = i2c_add_driver(&wm8728_i2c_driver);
366 if (ret != 0) {
367 dev_err(&pdev->dev, "can't add i2c driver\n");
368 return ret;
369 }
370
371 memset(&info, 0, sizeof(struct i2c_board_info));
372 info.addr = setup->i2c_address;
373 strlcpy(info.type, "wm8728", I2C_NAME_SIZE);
374
375 adapter = i2c_get_adapter(setup->i2c_bus);
376 if (!adapter) {
377 dev_err(&pdev->dev, "can't get i2c adapter %d\n",
378 setup->i2c_bus);
379 goto err_driver;
380 }
381
382 client = i2c_new_device(adapter, &info);
383 i2c_put_adapter(adapter);
384 if (!client) {
385 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
386 (unsigned int)info.addr);
387 goto err_driver;
388 }
389
390 return 0;
391
392err_driver:
393 i2c_del_driver(&wm8728_i2c_driver);
394 return -ENODEV;
395}
396#endif
397
398#if defined(CONFIG_SPI_MASTER)
399static int __devinit wm8728_spi_probe(struct spi_device *spi)
400{
401 struct snd_soc_device *socdev = wm8728_socdev;
402 struct snd_soc_codec *codec = socdev->card->codec;
403 int ret;
404
405 codec->control_data = spi;
406
407 ret = wm8728_init(socdev, SND_SOC_SPI);
408 if (ret < 0)
409 dev_err(&spi->dev, "failed to initialise WM8728\n");
410
411 return ret;
412}
413
414static int __devexit wm8728_spi_remove(struct spi_device *spi)
415{
416 return 0;
417}
418
419static struct spi_driver wm8728_spi_driver = {
420 .driver = {
421 .name = "wm8728",
422 .bus = &spi_bus_type,
423 .owner = THIS_MODULE,
424 },
425 .probe = wm8728_spi_probe,
426 .remove = __devexit_p(wm8728_spi_remove),
427};
428#endif
429
430static int wm8728_probe(struct platform_device *pdev)
431{
432 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
433 struct wm8728_setup_data *setup;
434 struct snd_soc_codec *codec;
435 int ret = 0;
436
437 setup = socdev->codec_data;
438 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
439 if (codec == NULL)
440 return -ENOMEM;
441
442 socdev->card->codec = codec;
443 mutex_init(&codec->mutex);
444 INIT_LIST_HEAD(&codec->dapm_widgets);
445 INIT_LIST_HEAD(&codec->dapm_paths);
446
447 wm8728_socdev = socdev;
448 ret = -ENODEV;
449
450#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
451 if (setup->i2c_address) {
452 ret = wm8728_add_i2c_device(pdev, setup);
453 }
454#endif
455#if defined(CONFIG_SPI_MASTER)
456 if (setup->spi) {
457 ret = spi_register_driver(&wm8728_spi_driver);
458 if (ret != 0)
459 printk(KERN_ERR "can't add spi driver");
460 }
461#endif
462
463 if (ret != 0)
464 kfree(codec);
465
466 return ret;
467}
468
469
470static int wm8728_remove(struct platform_device *pdev)
471{
472 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
473 struct snd_soc_codec *codec = socdev->card->codec;
474
475 if (codec->control_data)
476 wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
477
478 snd_soc_free_pcms(socdev);
479 snd_soc_dapm_free(socdev);
480#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
481 i2c_unregister_device(codec->control_data);
482 i2c_del_driver(&wm8728_i2c_driver);
483#endif
484#if defined(CONFIG_SPI_MASTER)
485 spi_unregister_driver(&wm8728_spi_driver);
486#endif
487 kfree(codec);
488
489 return 0;
490}
491
492struct snd_soc_codec_device soc_codec_dev_wm8728 = {
493 .probe = wm8728_probe,
494 .remove = wm8728_remove,
495 .suspend = wm8728_suspend,
496 .resume = wm8728_resume,
497};
498EXPORT_SYMBOL_GPL(soc_codec_dev_wm8728);
499
500static int __init wm8728_modinit(void)
501{
502 return snd_soc_register_dai(&wm8728_dai);
503}
504module_init(wm8728_modinit);
505
506static void __exit wm8728_exit(void)
507{
508 snd_soc_unregister_dai(&wm8728_dai);
509}
510module_exit(wm8728_exit);
511
512MODULE_DESCRIPTION("ASoC WM8728 driver");
513MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
514MODULE_LICENSE("GPL");
515
