ASoC: Decouple DAPM from CODECs
[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         struct snd_soc_dapm_context *dapm = &codec->dapm;
77
78         snd_soc_dapm_new_controls(dapm, wm8728_dapm_widgets,
79                                   ARRAY_SIZE(wm8728_dapm_widgets));
80         snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
81
82         return 0;
83 }
84
85 static int wm8728_mute(struct snd_soc_dai *dai, int mute)
86 {
87         struct snd_soc_codec *codec = dai->codec;
88         u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL);
89
90         if (mute)
91                 snd_soc_write(codec, WM8728_DACCTL, mute_reg | 1);
92         else
93                 snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1);
94
95         return 0;
96 }
97
98 static int wm8728_hw_params(struct snd_pcm_substream *substream,
99         struct snd_pcm_hw_params *params,
100         struct snd_soc_dai *dai)
101 {
102         struct snd_soc_pcm_runtime *rtd = substream->private_data;
103         struct snd_soc_codec *codec = rtd->codec;
104         u16 dac = snd_soc_read(codec, WM8728_DACCTL);
105
106         dac &= ~0x18;
107
108         switch (params_format(params)) {
109         case SNDRV_PCM_FORMAT_S16_LE:
110                 break;
111         case SNDRV_PCM_FORMAT_S20_3LE:
112                 dac |= 0x10;
113                 break;
114         case SNDRV_PCM_FORMAT_S24_LE:
115                 dac |= 0x08;
116                 break;
117         default:
118                 return -EINVAL;
119         }
120
121         snd_soc_write(codec, WM8728_DACCTL, dac);
122
123         return 0;
124 }
125
126 static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai,
127                 unsigned int fmt)
128 {
129         struct snd_soc_codec *codec = codec_dai->codec;
130         u16 iface = snd_soc_read(codec, WM8728_IFCTL);
131
132         /* Currently only I2S is supported by the driver, though the
133          * hardware is more flexible.
134          */
135         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
136         case SND_SOC_DAIFMT_I2S:
137                 iface |= 1;
138                 break;
139         default:
140                 return -EINVAL;
141         }
142
143         /* The hardware only support full slave mode */
144         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
145         case SND_SOC_DAIFMT_CBS_CFS:
146                 break;
147         default:
148                 return -EINVAL;
149         }
150
151         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
152         case SND_SOC_DAIFMT_NB_NF:
153                 iface &= ~0x22;
154                 break;
155         case SND_SOC_DAIFMT_IB_NF:
156                 iface |=  0x20;
157                 iface &= ~0x02;
158                 break;
159         case SND_SOC_DAIFMT_NB_IF:
160                 iface |= 0x02;
161                 iface &= ~0x20;
162                 break;
163         case SND_SOC_DAIFMT_IB_IF:
164                 iface |= 0x22;
165                 break;
166         default:
167                 return -EINVAL;
168         }
169
170         snd_soc_write(codec, WM8728_IFCTL, iface);
171         return 0;
172 }
173
174 static int wm8728_set_bias_level(struct snd_soc_codec *codec,
175                                  enum snd_soc_bias_level level)
176 {
177         u16 reg;
178         int i;
179
180         switch (level) {
181         case SND_SOC_BIAS_ON:
182         case SND_SOC_BIAS_PREPARE:
183         case SND_SOC_BIAS_STANDBY:
184                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
185                         /* Power everything up... */
186                         reg = snd_soc_read(codec, WM8728_DACCTL);
187                         snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4);
188
189                         /* ..then sync in the register cache. */
190                         for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++)
191                                 snd_soc_write(codec, i,
192                                              snd_soc_read(codec, i));
193                 }
194                 break;
195
196         case SND_SOC_BIAS_OFF:
197                 reg = snd_soc_read(codec, WM8728_DACCTL);
198                 snd_soc_write(codec, WM8728_DACCTL, reg | 0x4);
199                 break;
200         }
201         codec->dapm.bias_level = level;
202         return 0;
203 }
204
205 #define WM8728_RATES (SNDRV_PCM_RATE_8000_192000)
206
207 #define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
208         SNDRV_PCM_FMTBIT_S24_LE)
209
210 static struct snd_soc_dai_ops wm8728_dai_ops = {
211         .hw_params      = wm8728_hw_params,
212         .digital_mute   = wm8728_mute,
213         .set_fmt        = wm8728_set_dai_fmt,
214 };
215
216 static struct snd_soc_dai_driver wm8728_dai = {
217         .name = "wm8728-hifi",
218         .playback = {
219                 .stream_name = "Playback",
220                 .channels_min = 2,
221                 .channels_max = 2,
222                 .rates = WM8728_RATES,
223                 .formats = WM8728_FORMATS,
224         },
225         .ops = &wm8728_dai_ops,
226 };
227
228 static int wm8728_suspend(struct snd_soc_codec *codec, pm_message_t state)
229 {
230         wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
231
232         return 0;
233 }
234
235 static int wm8728_resume(struct snd_soc_codec *codec)
236 {
237         wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
238
239         return 0;
240 }
241
242 static int wm8728_probe(struct snd_soc_codec *codec)
243 {
244         struct wm8728_priv *wm8728 = snd_soc_codec_get_drvdata(codec);
245         int ret;
246
247         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8728->control_type);
248         if (ret < 0) {
249                 printk(KERN_ERR "wm8728: failed to configure cache I/O: %d\n",
250                        ret);
251                 return ret;
252         }
253
254         /* power on device */
255         wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
256
257         snd_soc_add_controls(codec, wm8728_snd_controls,
258                                 ARRAY_SIZE(wm8728_snd_controls));
259         wm8728_add_widgets(codec);
260
261         return ret;
262 }
263
264 static int wm8728_remove(struct snd_soc_codec *codec)
265 {
266         wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
267         return 0;
268 }
269
270 static struct snd_soc_codec_driver soc_codec_dev_wm8728 = {
271         .probe =        wm8728_probe,
272         .remove =       wm8728_remove,
273         .suspend =      wm8728_suspend,
274         .resume =       wm8728_resume,
275         .set_bias_level = wm8728_set_bias_level,
276         .reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults),
277         .reg_word_size = sizeof(u16),
278         .reg_cache_default = wm8728_reg_defaults,
279 };
280
281 #if defined(CONFIG_SPI_MASTER)
282 static int __devinit wm8728_spi_probe(struct spi_device *spi)
283 {
284         struct wm8728_priv *wm8728;
285         int ret;
286
287         wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL);
288         if (wm8728 == NULL)
289                 return -ENOMEM;
290
291         wm8728->control_type = SND_SOC_SPI;
292         spi_set_drvdata(spi, wm8728);
293
294         ret = snd_soc_register_codec(&spi->dev,
295                         &soc_codec_dev_wm8728, &wm8728_dai, 1);
296         if (ret < 0)
297                 kfree(wm8728);
298         return ret;
299 }
300
301 static int __devexit wm8728_spi_remove(struct spi_device *spi)
302 {
303         snd_soc_unregister_codec(&spi->dev);
304         kfree(spi_get_drvdata(spi));
305         return 0;
306 }
307
308 static struct spi_driver wm8728_spi_driver = {
309         .driver = {
310                 .name   = "wm8728-codec",
311                 .owner  = THIS_MODULE,
312         },
313         .probe          = wm8728_spi_probe,
314         .remove         = __devexit_p(wm8728_spi_remove),
315 };
316 #endif /* CONFIG_SPI_MASTER */
317
318 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
319 static __devinit int wm8728_i2c_probe(struct i2c_client *i2c,
320                                       const struct i2c_device_id *id)
321 {
322         struct wm8728_priv *wm8728;
323         int ret;
324
325         wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL);
326         if (wm8728 == NULL)
327                 return -ENOMEM;
328
329         i2c_set_clientdata(i2c, wm8728);
330         wm8728->control_type = SND_SOC_I2C;
331
332         ret =  snd_soc_register_codec(&i2c->dev,
333                         &soc_codec_dev_wm8728, &wm8728_dai, 1);
334         if (ret < 0)
335                 kfree(wm8728);
336         return ret;
337 }
338
339 static __devexit int wm8728_i2c_remove(struct i2c_client *client)
340 {
341         snd_soc_unregister_codec(&client->dev);
342         kfree(i2c_get_clientdata(client));
343         return 0;
344 }
345
346 static const struct i2c_device_id wm8728_i2c_id[] = {
347         { "wm8728", 0 },
348         { }
349 };
350 MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id);
351
352 static struct i2c_driver wm8728_i2c_driver = {
353         .driver = {
354                 .name = "wm8728-codec",
355                 .owner = THIS_MODULE,
356         },
357         .probe =    wm8728_i2c_probe,
358         .remove =   __devexit_p(wm8728_i2c_remove),
359         .id_table = wm8728_i2c_id,
360 };
361 #endif
362
363 static int __init wm8728_modinit(void)
364 {
365         int ret = 0;
366 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
367         ret = i2c_add_driver(&wm8728_i2c_driver);
368         if (ret != 0) {
369                 printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n",
370                        ret);
371         }
372 #endif
373 #if defined(CONFIG_SPI_MASTER)
374         ret = spi_register_driver(&wm8728_spi_driver);
375         if (ret != 0) {
376                 printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n",
377                        ret);
378         }
379 #endif
380         return ret;
381 }
382 module_init(wm8728_modinit);
383
384 static void __exit wm8728_exit(void)
385 {
386 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
387         i2c_del_driver(&wm8728_i2c_driver);
388 #endif
389 #if defined(CONFIG_SPI_MASTER)
390         spi_unregister_driver(&wm8728_spi_driver);
391 #endif
392 }
393 module_exit(wm8728_exit);
394
395 MODULE_DESCRIPTION("ASoC WM8728 driver");
396 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
397 MODULE_LICENSE("GPL");