075f35e4f4cbbd33bde2b9904e0bc3b894350d39
[linux-2.6.git] / sound / soc / codecs / wm8728.c
1 /*
2  * wm8728.c  --  WM8728 ALSA SoC Audio driver
3  *
4  * Copyright 2008 Wolfson Microelectronics plc
5  *
6  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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 version 2 as
10  * published by the Free Software Foundation.
11  */
12
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 <linux/slab.h>
22 #include <sound/core.h>
23 #include <sound/pcm.h>
24 #include <sound/pcm_params.h>
25 #include <sound/soc.h>
26 #include <sound/soc-dapm.h>
27 #include <sound/initval.h>
28 #include <sound/tlv.h>
29
30 #include "wm8728.h"
31
32 /*
33  * We can't read the WM8728 register space so we cache them instead.
34  * Note that the defaults here aren't the physical defaults, we latch
35  * the volume update bits, mute the output and enable infinite zero
36  * detect.
37  */
38 static const u16 wm8728_reg_defaults[] = {
39         0x1ff,
40         0x1ff,
41         0x001,
42         0x100,
43 };
44
45 /* codec private data */
46 struct wm8728_priv {
47         enum snd_soc_control_type control_type;
48 };
49
50 static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1);
51
52 static const struct snd_kcontrol_new wm8728_snd_controls[] = {
53
54 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL,
55                  0, 255, 0, wm8728_tlv),
56
57 SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0),
58 };
59
60 /*
61  * DAPM controls.
62  */
63 static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = {
64 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0),
65 SND_SOC_DAPM_OUTPUT("VOUTL"),
66 SND_SOC_DAPM_OUTPUT("VOUTR"),
67 };
68
69 static const struct snd_soc_dapm_route intercon[] = {
70         {"VOUTL", NULL, "DAC"},
71         {"VOUTR", NULL, "DAC"},
72 };
73
74 static int wm8728_add_widgets(struct snd_soc_codec *codec)
75 {
76         snd_soc_dapm_new_controls(codec, wm8728_dapm_widgets,
77                                   ARRAY_SIZE(wm8728_dapm_widgets));
78
79         snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
80
81         return 0;
82 }
83
84 static int wm8728_mute(struct snd_soc_dai *dai, int mute)
85 {
86         struct snd_soc_codec *codec = dai->codec;
87         u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL);
88
89         if (mute)
90                 snd_soc_write(codec, WM8728_DACCTL, mute_reg | 1);
91         else
92                 snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1);
93
94         return 0;
95 }
96
97 static int wm8728_hw_params(struct snd_pcm_substream *substream,
98         struct snd_pcm_hw_params *params,
99         struct snd_soc_dai *dai)
100 {
101         struct snd_soc_pcm_runtime *rtd = substream->private_data;
102         struct snd_soc_codec *codec = rtd->codec;
103         u16 dac = snd_soc_read(codec, WM8728_DACCTL);
104
105         dac &= ~0x18;
106
107         switch (params_format(params)) {
108         case SNDRV_PCM_FORMAT_S16_LE:
109                 break;
110         case SNDRV_PCM_FORMAT_S20_3LE:
111                 dac |= 0x10;
112                 break;
113         case SNDRV_PCM_FORMAT_S24_LE:
114                 dac |= 0x08;
115                 break;
116         default:
117                 return -EINVAL;
118         }
119
120         snd_soc_write(codec, WM8728_DACCTL, dac);
121
122         return 0;
123 }
124
125 static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai,
126                 unsigned int fmt)
127 {
128         struct snd_soc_codec *codec = codec_dai->codec;
129         u16 iface = snd_soc_read(codec, WM8728_IFCTL);
130
131         /* Currently only I2S is supported by the driver, though the
132          * hardware is more flexible.
133          */
134         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
135         case SND_SOC_DAIFMT_I2S:
136                 iface |= 1;
137                 break;
138         default:
139                 return -EINVAL;
140         }
141
142         /* The hardware only support full slave mode */
143         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
144         case SND_SOC_DAIFMT_CBS_CFS:
145                 break;
146         default:
147                 return -EINVAL;
148         }
149
150         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
151         case SND_SOC_DAIFMT_NB_NF:
152                 iface &= ~0x22;
153                 break;
154         case SND_SOC_DAIFMT_IB_NF:
155                 iface |=  0x20;
156                 iface &= ~0x02;
157                 break;
158         case SND_SOC_DAIFMT_NB_IF:
159                 iface |= 0x02;
160                 iface &= ~0x20;
161                 break;
162         case SND_SOC_DAIFMT_IB_IF:
163                 iface |= 0x22;
164                 break;
165         default:
166                 return -EINVAL;
167         }
168
169         snd_soc_write(codec, WM8728_IFCTL, iface);
170         return 0;
171 }
172
173 static int wm8728_set_bias_level(struct snd_soc_codec *codec,
174                                  enum snd_soc_bias_level level)
175 {
176         u16 reg;
177         int i;
178
179         switch (level) {
180         case SND_SOC_BIAS_ON:
181         case SND_SOC_BIAS_PREPARE:
182         case SND_SOC_BIAS_STANDBY:
183                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
184                         /* Power everything up... */
185                         reg = snd_soc_read(codec, WM8728_DACCTL);
186                         snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4);
187
188                         /* ..then sync in the register cache. */
189                         for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++)
190                                 snd_soc_write(codec, i,
191                                              snd_soc_read(codec, i));
192                 }
193                 break;
194
195         case SND_SOC_BIAS_OFF:
196                 reg = snd_soc_read(codec, WM8728_DACCTL);
197                 snd_soc_write(codec, WM8728_DACCTL, reg | 0x4);
198                 break;
199         }
200         codec->bias_level = level;
201         return 0;
202 }
203
204 #define WM8728_RATES (SNDRV_PCM_RATE_8000_192000)
205
206 #define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
207         SNDRV_PCM_FMTBIT_S24_LE)
208
209 static struct snd_soc_dai_ops wm8728_dai_ops = {
210         .hw_params      = wm8728_hw_params,
211         .digital_mute   = wm8728_mute,
212         .set_fmt        = wm8728_set_dai_fmt,
213 };
214
215 static struct snd_soc_dai_driver wm8728_dai = {
216         .name = "wm8728-hifi",
217         .playback = {
218                 .stream_name = "Playback",
219                 .channels_min = 2,
220                 .channels_max = 2,
221                 .rates = WM8728_RATES,
222                 .formats = WM8728_FORMATS,
223         },
224         .ops = &wm8728_dai_ops,
225 };
226
227 static int wm8728_suspend(struct snd_soc_codec *codec, pm_message_t state)
228 {
229         wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
230
231         return 0;
232 }
233
234 static int wm8728_resume(struct snd_soc_codec *codec)
235 {
236         wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
237
238         return 0;
239 }
240
241 static int wm8728_probe(struct snd_soc_codec *codec)
242 {
243         struct wm8728_priv *wm8728 = snd_soc_codec_get_drvdata(codec);
244         int ret;
245
246         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8728->control_type);
247         if (ret < 0) {
248                 printk(KERN_ERR "wm8728: failed to configure cache I/O: %d\n",
249                        ret);
250                 return ret;
251         }
252
253         /* power on device */
254         wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
255
256         snd_soc_add_controls(codec, wm8728_snd_controls,
257                                 ARRAY_SIZE(wm8728_snd_controls));
258         wm8728_add_widgets(codec);
259
260         return ret;
261 }
262
263 static int wm8728_remove(struct snd_soc_codec *codec)
264 {
265         wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
266         return 0;
267 }
268
269 static struct snd_soc_codec_driver soc_codec_dev_wm8728 = {
270         .probe =        wm8728_probe,
271         .remove =       wm8728_remove,
272         .suspend =      wm8728_suspend,
273         .resume =       wm8728_resume,
274         .set_bias_level = wm8728_set_bias_level,
275         .reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults),
276         .reg_word_size = sizeof(u16),
277         .reg_cache_default = wm8728_reg_defaults,
278 };
279
280 #if defined(CONFIG_SPI_MASTER)
281 static int __devinit wm8728_spi_probe(struct spi_device *spi)
282 {
283         struct wm8728_priv *wm8728;
284         int ret;
285
286         wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL);
287         if (wm8728 == NULL)
288                 return -ENOMEM;
289
290         wm8728->control_type = SND_SOC_SPI;
291         spi_set_drvdata(spi, wm8728);
292
293         ret = snd_soc_register_codec(&spi->dev,
294                         &soc_codec_dev_wm8728, &wm8728_dai, 1);
295         if (ret < 0)
296                 kfree(wm8728);
297         return ret;
298 }
299
300 static int __devexit wm8728_spi_remove(struct spi_device *spi)
301 {
302         snd_soc_unregister_codec(&spi->dev);
303         kfree(spi_get_drvdata(spi));
304         return 0;
305 }
306
307 static struct spi_driver wm8728_spi_driver = {
308         .driver = {
309                 .name   = "wm8728-codec",
310                 .owner  = THIS_MODULE,
311         },
312         .probe          = wm8728_spi_probe,
313         .remove         = __devexit_p(wm8728_spi_remove),
314 };
315 #endif /* CONFIG_SPI_MASTER */
316
317 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
318 static __devinit int wm8728_i2c_probe(struct i2c_client *i2c,
319                                       const struct i2c_device_id *id)
320 {
321         struct wm8728_priv *wm8728;
322         int ret;
323
324         wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL);
325         if (wm8728 == NULL)
326                 return -ENOMEM;
327
328         i2c_set_clientdata(i2c, wm8728);
329         wm8728->control_type = SND_SOC_I2C;
330
331         ret =  snd_soc_register_codec(&i2c->dev,
332                         &soc_codec_dev_wm8728, &wm8728_dai, 1);
333         if (ret < 0)
334                 kfree(wm8728);
335         return ret;
336 }
337
338 static __devexit int wm8728_i2c_remove(struct i2c_client *client)
339 {
340         snd_soc_unregister_codec(&client->dev);
341         kfree(i2c_get_clientdata(client));
342         return 0;
343 }
344
345 static const struct i2c_device_id wm8728_i2c_id[] = {
346         { "wm8728", 0 },
347         { }
348 };
349 MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id);
350
351 static struct i2c_driver wm8728_i2c_driver = {
352         .driver = {
353                 .name = "wm8728-codec",
354                 .owner = THIS_MODULE,
355         },
356         .probe =    wm8728_i2c_probe,
357         .remove =   __devexit_p(wm8728_i2c_remove),
358         .id_table = wm8728_i2c_id,
359 };
360 #endif
361
362 static int __init wm8728_modinit(void)
363 {
364         int ret = 0;
365 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
366         ret = i2c_add_driver(&wm8728_i2c_driver);
367         if (ret != 0) {
368                 printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n",
369                        ret);
370         }
371 #endif
372 #if defined(CONFIG_SPI_MASTER)
373         ret = spi_register_driver(&wm8728_spi_driver);
374         if (ret != 0) {
375                 printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n",
376                        ret);
377         }
378 #endif
379         return ret;
380 }
381 module_init(wm8728_modinit);
382
383 static void __exit wm8728_exit(void)
384 {
385 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
386         i2c_del_driver(&wm8728_i2c_driver);
387 #endif
388 #if defined(CONFIG_SPI_MASTER)
389         spi_unregister_driver(&wm8728_spi_driver);
390 #endif
391 }
392 module_exit(wm8728_exit);
393
394 MODULE_DESCRIPTION("ASoC WM8728 driver");
395 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
396 MODULE_LICENSE("GPL");