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
ak4535_volatile(struct device * dev,unsigned int reg)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
ak4535_set_dai_sysclk(struct snd_soc_dai * codec_dai,int clk_id,unsigned int freq,int dir)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
ak4535_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)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
ak4535_set_dai_fmt(struct snd_soc_dai * codec_dai,unsigned int fmt)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
ak4535_mute(struct snd_soc_dai * dai,int mute)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
ak4535_set_bias_level(struct snd_soc_codec * codec,enum snd_soc_bias_level level)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
ak4535_suspend(struct snd_soc_codec * codec)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
ak4535_resume(struct snd_soc_codec * codec)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
ak4535_probe(struct snd_soc_codec * codec)389 static int ak4535_probe(struct snd_soc_codec *codec)
390 {
391 /* power on device */
392 ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
393
394 snd_soc_add_codec_controls(codec, ak4535_snd_controls,
395 ARRAY_SIZE(ak4535_snd_controls));
396 return 0;
397 }
398
399 /* power down chip */
ak4535_remove(struct snd_soc_codec * codec)400 static int ak4535_remove(struct snd_soc_codec *codec)
401 {
402 ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
403 return 0;
404 }
405
406 static const struct regmap_config ak4535_regmap = {
407 .reg_bits = 8,
408 .val_bits = 8,
409
410 .max_register = AK4535_STATUS,
411 .volatile_reg = ak4535_volatile,
412
413 .cache_type = REGCACHE_RBTREE,
414 .reg_defaults = ak4535_reg_defaults,
415 .num_reg_defaults = ARRAY_SIZE(ak4535_reg_defaults),
416 };
417
418 static struct snd_soc_codec_driver soc_codec_dev_ak4535 = {
419 .probe = ak4535_probe,
420 .remove = ak4535_remove,
421 .suspend = ak4535_suspend,
422 .resume = ak4535_resume,
423 .set_bias_level = ak4535_set_bias_level,
424 .dapm_widgets = ak4535_dapm_widgets,
425 .num_dapm_widgets = ARRAY_SIZE(ak4535_dapm_widgets),
426 .dapm_routes = ak4535_audio_map,
427 .num_dapm_routes = ARRAY_SIZE(ak4535_audio_map),
428 };
429
ak4535_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)430 static int ak4535_i2c_probe(struct i2c_client *i2c,
431 const struct i2c_device_id *id)
432 {
433 struct ak4535_priv *ak4535;
434 int ret;
435
436 ak4535 = devm_kzalloc(&i2c->dev, sizeof(struct ak4535_priv),
437 GFP_KERNEL);
438 if (ak4535 == NULL)
439 return -ENOMEM;
440
441 ak4535->regmap = devm_regmap_init_i2c(i2c, &ak4535_regmap);
442 if (IS_ERR(ak4535->regmap)) {
443 ret = PTR_ERR(ak4535->regmap);
444 dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
445 return ret;
446 }
447
448 i2c_set_clientdata(i2c, ak4535);
449
450 ret = snd_soc_register_codec(&i2c->dev,
451 &soc_codec_dev_ak4535, &ak4535_dai, 1);
452
453 return ret;
454 }
455
ak4535_i2c_remove(struct i2c_client * client)456 static int ak4535_i2c_remove(struct i2c_client *client)
457 {
458 snd_soc_unregister_codec(&client->dev);
459 return 0;
460 }
461
462 static const struct i2c_device_id ak4535_i2c_id[] = {
463 { "ak4535", 0 },
464 { }
465 };
466 MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id);
467
468 static struct i2c_driver ak4535_i2c_driver = {
469 .driver = {
470 .name = "ak4535",
471 .owner = THIS_MODULE,
472 },
473 .probe = ak4535_i2c_probe,
474 .remove = ak4535_i2c_remove,
475 .id_table = ak4535_i2c_id,
476 };
477
478 module_i2c_driver(ak4535_i2c_driver);
479
480 MODULE_DESCRIPTION("Soc AK4535 driver");
481 MODULE_AUTHOR("Richard Purdie");
482 MODULE_LICENSE("GPL");
483