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Linux/sound/soc/codecs/ak4535.c

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  1 /*
  2  * ak4535.c  --  AK4535 ALSA Soc Audio driver
  3  *
  4  * Copyright 2005 Openedhand Ltd.
  5  *
  6  * Author: Richard Purdie <richard@openedhand.com>
  7  *
  8  * Based on wm8753.c by Liam Girdwood
  9  *
 10  * This program is free software; you can redistribute it and/or modify
 11  * it under the terms of the GNU General Public License version 2 as
 12  * published by the Free Software Foundation.
 13  */
 14 
 15 #include <linux/module.h>
 16 #include <linux/moduleparam.h>
 17 #include <linux/init.h>
 18 #include <linux/delay.h>
 19 #include <linux/pm.h>
 20 #include <linux/i2c.h>
 21 #include <linux/regmap.h>
 22 #include <linux/slab.h>
 23 #include <sound/core.h>
 24 #include <sound/pcm.h>
 25 #include <sound/pcm_params.h>
 26 #include <sound/soc.h>
 27 #include <sound/initval.h>
 28 
 29 #include "ak4535.h"
 30 
 31 /* codec private data */
 32 struct ak4535_priv {
 33         struct regmap *regmap;
 34         unsigned int sysclk;
 35 };
 36 
 37 /*
 38  * ak4535 register cache
 39  */
 40 static const struct reg_default ak4535_reg_defaults[] = {
 41         { 0, 0x00 },
 42         { 1, 0x80 },
 43         { 2, 0x00 },
 44         { 3, 0x03 },
 45         { 4, 0x02 },
 46         { 5, 0x00 },
 47         { 6, 0x11 },
 48         { 7, 0x01 },
 49         { 8, 0x00 },
 50         { 9, 0x40 },
 51         { 10, 0x36 },
 52         { 11, 0x10 },
 53         { 12, 0x00 },
 54         { 13, 0x00 },
 55         { 14, 0x57 },
 56 };
 57 
 58 static bool ak4535_volatile(struct device *dev, unsigned int reg)
 59 {
 60         switch (reg) {
 61         case AK4535_STATUS:
 62                 return true;
 63         default:
 64                 return false;
 65         }
 66 }
 67 
 68 static const char *ak4535_mono_gain[] = {"+6dB", "-17dB"};
 69 static const char *ak4535_mono_out[] = {"(L + R)/2", "Hi-Z"};
 70 static const char *ak4535_hp_out[] = {"Stereo", "Mono"};
 71 static const char *ak4535_deemp[] = {"44.1kHz", "Off", "48kHz", "32kHz"};
 72 static const char *ak4535_mic_select[] = {"Internal", "External"};
 73 
 74 static const struct soc_enum ak4535_enum[] = {
 75         SOC_ENUM_SINGLE(AK4535_SIG1, 7, 2, ak4535_mono_gain),
 76         SOC_ENUM_SINGLE(AK4535_SIG1, 6, 2, ak4535_mono_out),
 77         SOC_ENUM_SINGLE(AK4535_MODE2, 2, 2, ak4535_hp_out),
 78         SOC_ENUM_SINGLE(AK4535_DAC, 0, 4, ak4535_deemp),
 79         SOC_ENUM_SINGLE(AK4535_MIC, 1, 2, ak4535_mic_select),
 80 };
 81 
 82 static const struct snd_kcontrol_new ak4535_snd_controls[] = {
 83         SOC_SINGLE("ALC2 Switch", AK4535_SIG1, 1, 1, 0),
 84         SOC_ENUM("Mono 1 Output", ak4535_enum[1]),
 85         SOC_ENUM("Mono 1 Gain", ak4535_enum[0]),
 86         SOC_ENUM("Headphone Output", ak4535_enum[2]),
 87         SOC_ENUM("Playback Deemphasis", ak4535_enum[3]),
 88         SOC_SINGLE("Bass Volume", AK4535_DAC, 2, 3, 0),
 89         SOC_SINGLE("Mic Boost (+20dB) Switch", AK4535_MIC, 0, 1, 0),
 90         SOC_ENUM("Mic Select", ak4535_enum[4]),
 91         SOC_SINGLE("ALC Operation Time", AK4535_TIMER, 0, 3, 0),
 92         SOC_SINGLE("ALC Recovery Time", AK4535_TIMER, 2, 3, 0),
 93         SOC_SINGLE("ALC ZC Time", AK4535_TIMER, 4, 3, 0),
 94         SOC_SINGLE("ALC 1 Switch", AK4535_ALC1, 5, 1, 0),
 95         SOC_SINGLE("ALC 2 Switch", AK4535_ALC1, 6, 1, 0),
 96         SOC_SINGLE("ALC Volume", AK4535_ALC2, 0, 127, 0),
 97         SOC_SINGLE("Capture Volume", AK4535_PGA, 0, 127, 0),
 98         SOC_SINGLE("Left Playback Volume", AK4535_LATT, 0, 127, 1),
 99         SOC_SINGLE("Right Playback Volume", AK4535_RATT, 0, 127, 1),
100         SOC_SINGLE("AUX Bypass Volume", AK4535_VOL, 0, 15, 0),
101         SOC_SINGLE("Mic Sidetone Volume", AK4535_VOL, 4, 7, 0),
102 };
103 
104 /* Mono 1 Mixer */
105 static const struct snd_kcontrol_new ak4535_mono1_mixer_controls[] = {
106         SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG1, 4, 1, 0),
107         SOC_DAPM_SINGLE("Mono Playback Switch", AK4535_SIG1, 5, 1, 0),
108 };
109 
110 /* Stereo Mixer */
111 static const struct snd_kcontrol_new ak4535_stereo_mixer_controls[] = {
112         SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG2, 4, 1, 0),
113         SOC_DAPM_SINGLE("Playback Switch", AK4535_SIG2, 7, 1, 0),
114         SOC_DAPM_SINGLE("Aux Bypass Switch", AK4535_SIG2, 5, 1, 0),
115 };
116 
117 /* Input Mixer */
118 static const struct snd_kcontrol_new ak4535_input_mixer_controls[] = {
119         SOC_DAPM_SINGLE("Mic Capture Switch", AK4535_MIC, 2, 1, 0),
120         SOC_DAPM_SINGLE("Aux Capture Switch", AK4535_MIC, 5, 1, 0),
121 };
122 
123 /* Input mux */
124 static const struct snd_kcontrol_new ak4535_input_mux_control =
125         SOC_DAPM_ENUM("Input Select", ak4535_enum[4]);
126 
127 /* HP L switch */
128 static const struct snd_kcontrol_new ak4535_hpl_control =
129         SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1);
130 
131 /* HP R switch */
132 static const struct snd_kcontrol_new ak4535_hpr_control =
133         SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1);
134 
135 /* mono 2 switch */
136 static const struct snd_kcontrol_new ak4535_mono2_control =
137         SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0);
138 
139 /* Line out switch */
140 static const struct snd_kcontrol_new ak4535_line_control =
141         SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0);
142 
143 /* ak4535 dapm widgets */
144 static const struct snd_soc_dapm_widget ak4535_dapm_widgets[] = {
145         SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0,
146                 &ak4535_stereo_mixer_controls[0],
147                 ARRAY_SIZE(ak4535_stereo_mixer_controls)),
148         SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0,
149                 &ak4535_mono1_mixer_controls[0],
150                 ARRAY_SIZE(ak4535_mono1_mixer_controls)),
151         SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0,
152                 &ak4535_input_mixer_controls[0],
153                 ARRAY_SIZE(ak4535_input_mixer_controls)),
154         SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
155                 &ak4535_input_mux_control),
156         SND_SOC_DAPM_DAC("DAC", "Playback", AK4535_PM2, 0, 0),
157         SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0,
158                 &ak4535_mono2_control),
159         /* speaker powersave bit */
160         SND_SOC_DAPM_PGA("Speaker Enable", AK4535_MODE2, 0, 0, NULL, 0),
161         SND_SOC_DAPM_SWITCH("Line Out Enable", SND_SOC_NOPM, 0, 0,
162                 &ak4535_line_control),
163         SND_SOC_DAPM_SWITCH("Left HP Enable", SND_SOC_NOPM, 0, 0,
164                 &ak4535_hpl_control),
165         SND_SOC_DAPM_SWITCH("Right HP Enable", SND_SOC_NOPM, 0, 0,
166                 &ak4535_hpr_control),
167         SND_SOC_DAPM_OUTPUT("LOUT"),
168         SND_SOC_DAPM_OUTPUT("HPL"),
169         SND_SOC_DAPM_OUTPUT("ROUT"),
170         SND_SOC_DAPM_OUTPUT("HPR"),
171         SND_SOC_DAPM_OUTPUT("SPP"),
172         SND_SOC_DAPM_OUTPUT("SPN"),
173         SND_SOC_DAPM_OUTPUT("MOUT1"),
174         SND_SOC_DAPM_OUTPUT("MOUT2"),
175         SND_SOC_DAPM_OUTPUT("MICOUT"),
176         SND_SOC_DAPM_ADC("ADC", "Capture", AK4535_PM1, 0, 0),
177         SND_SOC_DAPM_PGA("Spk Amp", AK4535_PM2, 3, 0, NULL, 0),
178         SND_SOC_DAPM_PGA("HP R Amp", AK4535_PM2, 1, 0, NULL, 0),
179         SND_SOC_DAPM_PGA("HP L Amp", AK4535_PM2, 2, 0, NULL, 0),
180         SND_SOC_DAPM_PGA("Mic", AK4535_PM1, 1, 0, NULL, 0),
181         SND_SOC_DAPM_PGA("Line Out", AK4535_PM1, 4, 0, NULL, 0),
182         SND_SOC_DAPM_PGA("Mono Out", AK4535_PM1, 3, 0, NULL, 0),
183         SND_SOC_DAPM_PGA("AUX In", AK4535_PM1, 2, 0, NULL, 0),
184 
185         SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4535_MIC, 3, 0),
186         SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4535_MIC, 4, 0),
187         SND_SOC_DAPM_INPUT("MICIN"),
188         SND_SOC_DAPM_INPUT("MICEXT"),
189         SND_SOC_DAPM_INPUT("AUX"),
190         SND_SOC_DAPM_INPUT("MIN"),
191         SND_SOC_DAPM_INPUT("AIN"),
192 };
193 
194 static const struct snd_soc_dapm_route ak4535_audio_map[] = {
195         /*stereo mixer */
196         {"Stereo Mixer", "Playback Switch", "DAC"},
197         {"Stereo Mixer", "Mic Sidetone Switch", "Mic"},
198         {"Stereo Mixer", "Aux Bypass Switch", "AUX In"},
199 
200         /* mono1 mixer */
201         {"Mono1 Mixer", "Mic Sidetone Switch", "Mic"},
202         {"Mono1 Mixer", "Mono Playback Switch", "DAC"},
203 
204         /* Mic */
205         {"Mic", NULL, "AIN"},
206         {"Input Mux", "Internal", "Mic Int Bias"},
207         {"Input Mux", "External", "Mic Ext Bias"},
208         {"Mic Int Bias", NULL, "MICIN"},
209         {"Mic Ext Bias", NULL, "MICEXT"},
210         {"MICOUT", NULL, "Input Mux"},
211 
212         /* line out */
213         {"LOUT", NULL, "Line Out Enable"},
214         {"ROUT", NULL, "Line Out Enable"},
215         {"Line Out Enable", "Switch", "Line Out"},
216         {"Line Out", NULL, "Stereo Mixer"},
217 
218         /* mono1 out */
219         {"MOUT1", NULL, "Mono Out"},
220         {"Mono Out", NULL, "Mono1 Mixer"},
221 
222         /* left HP */
223         {"HPL", NULL, "Left HP Enable"},
224         {"Left HP Enable", "Switch", "HP L Amp"},
225         {"HP L Amp", NULL, "Stereo Mixer"},
226 
227         /* right HP */
228         {"HPR", NULL, "Right HP Enable"},
229         {"Right HP Enable", "Switch", "HP R Amp"},
230         {"HP R Amp", NULL, "Stereo Mixer"},
231 
232         /* speaker */
233         {"SPP", NULL, "Speaker Enable"},
234         {"SPN", NULL, "Speaker Enable"},
235         {"Speaker Enable", "Switch", "Spk Amp"},
236         {"Spk Amp", NULL, "MIN"},
237 
238         /* mono 2 */
239         {"MOUT2", NULL, "Mono 2 Enable"},
240         {"Mono 2 Enable", "Switch", "Stereo Mixer"},
241 
242         /* Aux In */
243         {"Aux In", NULL, "AUX"},
244 
245         /* ADC */
246         {"ADC", NULL, "Input Mixer"},
247         {"Input Mixer", "Mic Capture Switch", "Mic"},
248         {"Input Mixer", "Aux Capture Switch", "Aux In"},
249 };
250 
251 static int ak4535_set_dai_sysclk(struct snd_soc_dai *codec_dai,
252         int clk_id, unsigned int freq, int dir)
253 {
254         struct snd_soc_codec *codec = codec_dai->codec;
255         struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
256 
257         ak4535->sysclk = freq;
258         return 0;
259 }
260 
261 static int ak4535_hw_params(struct snd_pcm_substream *substream,
262                             struct snd_pcm_hw_params *params,
263                             struct snd_soc_dai *dai)
264 {
265         struct snd_soc_codec *codec = dai->codec;
266         struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
267         u8 mode2 = snd_soc_read(codec, AK4535_MODE2) & ~(0x3 << 5);
268         int rate = params_rate(params), fs = 256;
269 
270         if (rate)
271                 fs = ak4535->sysclk / rate;
272 
273         /* set fs */
274         switch (fs) {
275         case 1024:
276                 mode2 |= (0x2 << 5);
277                 break;
278         case 512:
279                 mode2 |= (0x1 << 5);
280                 break;
281         case 256:
282                 break;
283         }
284 
285         /* set rate */
286         snd_soc_write(codec, AK4535_MODE2, mode2);
287         return 0;
288 }
289 
290 static int ak4535_set_dai_fmt(struct snd_soc_dai *codec_dai,
291                 unsigned int fmt)
292 {
293         struct snd_soc_codec *codec = codec_dai->codec;
294         u8 mode1 = 0;
295 
296         /* interface format */
297         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
298         case SND_SOC_DAIFMT_I2S:
299                 mode1 = 0x0002;
300                 break;
301         case SND_SOC_DAIFMT_LEFT_J:
302                 mode1 = 0x0001;
303                 break;
304         default:
305                 return -EINVAL;
306         }
307 
308         /* use 32 fs for BCLK to save power */
309         mode1 |= 0x4;
310 
311         snd_soc_write(codec, AK4535_MODE1, mode1);
312         return 0;
313 }
314 
315 static int ak4535_mute(struct snd_soc_dai *dai, int mute)
316 {
317         struct snd_soc_codec *codec = dai->codec;
318         u16 mute_reg = snd_soc_read(codec, AK4535_DAC);
319         if (!mute)
320                 snd_soc_write(codec, AK4535_DAC, mute_reg & ~0x20);
321         else
322                 snd_soc_write(codec, AK4535_DAC, mute_reg | 0x20);
323         return 0;
324 }
325 
326 static int ak4535_set_bias_level(struct snd_soc_codec *codec,
327         enum snd_soc_bias_level level)
328 {
329         switch (level) {
330         case SND_SOC_BIAS_ON:
331                 snd_soc_update_bits(codec, AK4535_DAC, 0x20, 0);
332                 break;
333         case SND_SOC_BIAS_PREPARE:
334                 snd_soc_update_bits(codec, AK4535_DAC, 0x20, 0x20);
335                 break;
336         case SND_SOC_BIAS_STANDBY:
337                 snd_soc_update_bits(codec, AK4535_PM1, 0x80, 0x80);
338                 snd_soc_update_bits(codec, AK4535_PM2, 0x80, 0);
339                 break;
340         case SND_SOC_BIAS_OFF:
341                 snd_soc_update_bits(codec, AK4535_PM1, 0x80, 0);
342                 break;
343         }
344         codec->dapm.bias_level = level;
345         return 0;
346 }
347 
348 #define AK4535_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
349                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
350                 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
351 
352 static const struct snd_soc_dai_ops ak4535_dai_ops = {
353         .hw_params      = ak4535_hw_params,
354         .set_fmt        = ak4535_set_dai_fmt,
355         .digital_mute   = ak4535_mute,
356         .set_sysclk     = ak4535_set_dai_sysclk,
357 };
358 
359 static struct snd_soc_dai_driver ak4535_dai = {
360         .name = "ak4535-hifi",
361         .playback = {
362                 .stream_name = "Playback",
363                 .channels_min = 1,
364                 .channels_max = 2,
365                 .rates = AK4535_RATES,
366                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
367         .capture = {
368                 .stream_name = "Capture",
369                 .channels_min = 1,
370                 .channels_max = 2,
371                 .rates = AK4535_RATES,
372                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
373         .ops = &ak4535_dai_ops,
374 };
375 
376 static int ak4535_suspend(struct snd_soc_codec *codec)
377 {
378         ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
379         return 0;
380 }
381 
382 static int ak4535_resume(struct snd_soc_codec *codec)
383 {
384         snd_soc_cache_sync(codec);
385         ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
386         return 0;
387 }
388 
389 static int ak4535_probe(struct snd_soc_codec *codec)
390 {
391         struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
392         int ret;
393 
394         codec->control_data = ak4535->regmap;
395         ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_REGMAP);
396         if (ret < 0) {
397                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
398                 return ret;
399         }
400         /* power on device */
401         ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
402 
403         snd_soc_add_codec_controls(codec, ak4535_snd_controls,
404                                 ARRAY_SIZE(ak4535_snd_controls));
405         return 0;
406 }
407 
408 /* power down chip */
409 static int ak4535_remove(struct snd_soc_codec *codec)
410 {
411         ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
412         return 0;
413 }
414 
415 static const struct regmap_config ak4535_regmap = {
416         .reg_bits = 8,
417         .val_bits = 8,
418 
419         .max_register = AK4535_STATUS,
420         .volatile_reg = ak4535_volatile,
421 
422         .cache_type = REGCACHE_RBTREE,
423         .reg_defaults = ak4535_reg_defaults,
424         .num_reg_defaults = ARRAY_SIZE(ak4535_reg_defaults),
425 };
426 
427 static struct snd_soc_codec_driver soc_codec_dev_ak4535 = {
428         .probe =        ak4535_probe,
429         .remove =       ak4535_remove,
430         .suspend =      ak4535_suspend,
431         .resume =       ak4535_resume,
432         .set_bias_level = ak4535_set_bias_level,
433         .dapm_widgets = ak4535_dapm_widgets,
434         .num_dapm_widgets = ARRAY_SIZE(ak4535_dapm_widgets),
435         .dapm_routes = ak4535_audio_map,
436         .num_dapm_routes = ARRAY_SIZE(ak4535_audio_map),
437 };
438 
439 static int ak4535_i2c_probe(struct i2c_client *i2c,
440                             const struct i2c_device_id *id)
441 {
442         struct ak4535_priv *ak4535;
443         int ret;
444 
445         ak4535 = devm_kzalloc(&i2c->dev, sizeof(struct ak4535_priv),
446                               GFP_KERNEL);
447         if (ak4535 == NULL)
448                 return -ENOMEM;
449 
450         ak4535->regmap = devm_regmap_init_i2c(i2c, &ak4535_regmap);
451         if (IS_ERR(ak4535->regmap)) {
452                 ret = PTR_ERR(ak4535->regmap);
453                 dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
454                 return ret;
455         }
456 
457         i2c_set_clientdata(i2c, ak4535);
458 
459         ret = snd_soc_register_codec(&i2c->dev,
460                         &soc_codec_dev_ak4535, &ak4535_dai, 1);
461 
462         return ret;
463 }
464 
465 static int ak4535_i2c_remove(struct i2c_client *client)
466 {
467         snd_soc_unregister_codec(&client->dev);
468         return 0;
469 }
470 
471 static const struct i2c_device_id ak4535_i2c_id[] = {
472         { "ak4535", 0 },
473         { }
474 };
475 MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id);
476 
477 static struct i2c_driver ak4535_i2c_driver = {
478         .driver = {
479                 .name = "ak4535",
480                 .owner = THIS_MODULE,
481         },
482         .probe =    ak4535_i2c_probe,
483         .remove =   ak4535_i2c_remove,
484         .id_table = ak4535_i2c_id,
485 };
486 
487 module_i2c_driver(ak4535_i2c_driver);
488 
489 MODULE_DESCRIPTION("Soc AK4535 driver");
490 MODULE_AUTHOR("Richard Purdie");
491 MODULE_LICENSE("GPL");
492 

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