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/platform_device.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
29 #include "ak4535.h"
30
31 #define AK4535_VERSION "0.3"
32
33 struct snd_soc_codec_device soc_codec_dev_ak4535;
34
35 /* codec private data */
36 struct ak4535_priv {
37 unsigned int sysclk;
38 };
39
40 /*
41 * ak4535 register cache
42 */
43 static const u16 ak4535_reg[AK4535_CACHEREGNUM] = {
44 0x0000, 0x0080, 0x0000, 0x0003,
45 0x0002, 0x0000, 0x0011, 0x0001,
46 0x0000, 0x0040, 0x0036, 0x0010,
47 0x0000, 0x0000, 0x0057, 0x0000,
48 };
49
50 /*
51 * read ak4535 register cache
52 */
ak4535_read_reg_cache(struct snd_soc_codec * codec,unsigned int reg)53 static inline unsigned int ak4535_read_reg_cache(struct snd_soc_codec *codec,
54 unsigned int reg)
55 {
56 u16 *cache = codec->reg_cache;
57 if (reg >= AK4535_CACHEREGNUM)
58 return -1;
59 return cache[reg];
60 }
61
ak4535_read(struct snd_soc_codec * codec,unsigned int reg)62 static inline unsigned int ak4535_read(struct snd_soc_codec *codec,
63 unsigned int reg)
64 {
65 u8 data;
66 data = reg;
67
68 if (codec->hw_write(codec->control_data, &data, 1) != 1)
69 return -EIO;
70
71 if (codec->hw_read(codec->control_data, &data, 1) != 1)
72 return -EIO;
73
74 return data;
75 };
76
77 /*
78 * write ak4535 register cache
79 */
ak4535_write_reg_cache(struct snd_soc_codec * codec,u16 reg,unsigned int value)80 static inline void ak4535_write_reg_cache(struct snd_soc_codec *codec,
81 u16 reg, unsigned int value)
82 {
83 u16 *cache = codec->reg_cache;
84 if (reg >= AK4535_CACHEREGNUM)
85 return;
86 cache[reg] = value;
87 }
88
89 /*
90 * write to the AK4535 register space
91 */
ak4535_write(struct snd_soc_codec * codec,unsigned int reg,unsigned int value)92 static int ak4535_write(struct snd_soc_codec *codec, unsigned int reg,
93 unsigned int value)
94 {
95 u8 data[2];
96
97 /* data is
98 * D15..D8 AK4535 register offset
99 * D7...D0 register data
100 */
101 data[0] = reg & 0xff;
102 data[1] = value & 0xff;
103
104 ak4535_write_reg_cache(codec, reg, value);
105 if (codec->hw_write(codec->control_data, data, 2) == 2)
106 return 0;
107 else
108 return -EIO;
109 }
110
ak4535_sync(struct snd_soc_codec * codec)111 static int ak4535_sync(struct snd_soc_codec *codec)
112 {
113 u16 *cache = codec->reg_cache;
114 int i, r = 0;
115
116 for (i = 0; i < AK4535_CACHEREGNUM; i++)
117 r |= ak4535_write(codec, i, cache[i]);
118
119 return r;
120 };
121
122 static const char *ak4535_mono_gain[] = {"+6dB", "-17dB"};
123 static const char *ak4535_mono_out[] = {"(L + R)/2", "Hi-Z"};
124 static const char *ak4535_hp_out[] = {"Stereo", "Mono"};
125 static const char *ak4535_deemp[] = {"44.1kHz", "Off", "48kHz", "32kHz"};
126 static const char *ak4535_mic_select[] = {"Internal", "External"};
127
128 static const struct soc_enum ak4535_enum[] = {
129 SOC_ENUM_SINGLE(AK4535_SIG1, 7, 2, ak4535_mono_gain),
130 SOC_ENUM_SINGLE(AK4535_SIG1, 6, 2, ak4535_mono_out),
131 SOC_ENUM_SINGLE(AK4535_MODE2, 2, 2, ak4535_hp_out),
132 SOC_ENUM_SINGLE(AK4535_DAC, 0, 4, ak4535_deemp),
133 SOC_ENUM_SINGLE(AK4535_MIC, 1, 2, ak4535_mic_select),
134 };
135
136 static const struct snd_kcontrol_new ak4535_snd_controls[] = {
137 SOC_SINGLE("ALC2 Switch", AK4535_SIG1, 1, 1, 0),
138 SOC_ENUM("Mono 1 Output", ak4535_enum[1]),
139 SOC_ENUM("Mono 1 Gain", ak4535_enum[0]),
140 SOC_ENUM("Headphone Output", ak4535_enum[2]),
141 SOC_ENUM("Playback Deemphasis", ak4535_enum[3]),
142 SOC_SINGLE("Bass Volume", AK4535_DAC, 2, 3, 0),
143 SOC_SINGLE("Mic Boost (+20dB) Switch", AK4535_MIC, 0, 1, 0),
144 SOC_ENUM("Mic Select", ak4535_enum[4]),
145 SOC_SINGLE("ALC Operation Time", AK4535_TIMER, 0, 3, 0),
146 SOC_SINGLE("ALC Recovery Time", AK4535_TIMER, 2, 3, 0),
147 SOC_SINGLE("ALC ZC Time", AK4535_TIMER, 4, 3, 0),
148 SOC_SINGLE("ALC 1 Switch", AK4535_ALC1, 5, 1, 0),
149 SOC_SINGLE("ALC 2 Switch", AK4535_ALC1, 6, 1, 0),
150 SOC_SINGLE("ALC Volume", AK4535_ALC2, 0, 127, 0),
151 SOC_SINGLE("Capture Volume", AK4535_PGA, 0, 127, 0),
152 SOC_SINGLE("Left Playback Volume", AK4535_LATT, 0, 127, 1),
153 SOC_SINGLE("Right Playback Volume", AK4535_RATT, 0, 127, 1),
154 SOC_SINGLE("AUX Bypass Volume", AK4535_VOL, 0, 15, 0),
155 SOC_SINGLE("Mic Sidetone Volume", AK4535_VOL, 4, 7, 0),
156 };
157
158 /* add non dapm controls */
ak4535_add_controls(struct snd_soc_codec * codec)159 static int ak4535_add_controls(struct snd_soc_codec *codec)
160 {
161 int err, i;
162
163 for (i = 0; i < ARRAY_SIZE(ak4535_snd_controls); i++) {
164 err = snd_ctl_add(codec->card,
165 snd_soc_cnew(&ak4535_snd_controls[i], codec, NULL));
166 if (err < 0)
167 return err;
168 }
169
170 return 0;
171 }
172
173 /* Mono 1 Mixer */
174 static const struct snd_kcontrol_new ak4535_mono1_mixer_controls[] = {
175 SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG1, 4, 1, 0),
176 SOC_DAPM_SINGLE("Mono Playback Switch", AK4535_SIG1, 5, 1, 0),
177 };
178
179 /* Stereo Mixer */
180 static const struct snd_kcontrol_new ak4535_stereo_mixer_controls[] = {
181 SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG2, 4, 1, 0),
182 SOC_DAPM_SINGLE("Playback Switch", AK4535_SIG2, 7, 1, 0),
183 SOC_DAPM_SINGLE("Aux Bypass Switch", AK4535_SIG2, 5, 1, 0),
184 };
185
186 /* Input Mixer */
187 static const struct snd_kcontrol_new ak4535_input_mixer_controls[] = {
188 SOC_DAPM_SINGLE("Mic Capture Switch", AK4535_MIC, 2, 1, 0),
189 SOC_DAPM_SINGLE("Aux Capture Switch", AK4535_MIC, 5, 1, 0),
190 };
191
192 /* Input mux */
193 static const struct snd_kcontrol_new ak4535_input_mux_control =
194 SOC_DAPM_ENUM("Input Select", ak4535_enum[4]);
195
196 /* HP L switch */
197 static const struct snd_kcontrol_new ak4535_hpl_control =
198 SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1);
199
200 /* HP R switch */
201 static const struct snd_kcontrol_new ak4535_hpr_control =
202 SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1);
203
204 /* mono 2 switch */
205 static const struct snd_kcontrol_new ak4535_mono2_control =
206 SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0);
207
208 /* Line out switch */
209 static const struct snd_kcontrol_new ak4535_line_control =
210 SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0);
211
212 /* ak4535 dapm widgets */
213 static const struct snd_soc_dapm_widget ak4535_dapm_widgets[] = {
214 SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0,
215 &ak4535_stereo_mixer_controls[0],
216 ARRAY_SIZE(ak4535_stereo_mixer_controls)),
217 SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0,
218 &ak4535_mono1_mixer_controls[0],
219 ARRAY_SIZE(ak4535_mono1_mixer_controls)),
220 SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0,
221 &ak4535_input_mixer_controls[0],
222 ARRAY_SIZE(ak4535_input_mixer_controls)),
223 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
224 &ak4535_input_mux_control),
225 SND_SOC_DAPM_DAC("DAC", "Playback", AK4535_PM2, 0, 0),
226 SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0,
227 &ak4535_mono2_control),
228 /* speaker powersave bit */
229 SND_SOC_DAPM_PGA("Speaker Enable", AK4535_MODE2, 0, 0, NULL, 0),
230 SND_SOC_DAPM_SWITCH("Line Out Enable", SND_SOC_NOPM, 0, 0,
231 &ak4535_line_control),
232 SND_SOC_DAPM_SWITCH("Left HP Enable", SND_SOC_NOPM, 0, 0,
233 &ak4535_hpl_control),
234 SND_SOC_DAPM_SWITCH("Right HP Enable", SND_SOC_NOPM, 0, 0,
235 &ak4535_hpr_control),
236 SND_SOC_DAPM_OUTPUT("LOUT"),
237 SND_SOC_DAPM_OUTPUT("HPL"),
238 SND_SOC_DAPM_OUTPUT("ROUT"),
239 SND_SOC_DAPM_OUTPUT("HPR"),
240 SND_SOC_DAPM_OUTPUT("SPP"),
241 SND_SOC_DAPM_OUTPUT("SPN"),
242 SND_SOC_DAPM_OUTPUT("MOUT1"),
243 SND_SOC_DAPM_OUTPUT("MOUT2"),
244 SND_SOC_DAPM_OUTPUT("MICOUT"),
245 SND_SOC_DAPM_ADC("ADC", "Capture", AK4535_PM1, 0, 0),
246 SND_SOC_DAPM_PGA("Spk Amp", AK4535_PM2, 3, 0, NULL, 0),
247 SND_SOC_DAPM_PGA("HP R Amp", AK4535_PM2, 1, 0, NULL, 0),
248 SND_SOC_DAPM_PGA("HP L Amp", AK4535_PM2, 2, 0, NULL, 0),
249 SND_SOC_DAPM_PGA("Mic", AK4535_PM1, 1, 0, NULL, 0),
250 SND_SOC_DAPM_PGA("Line Out", AK4535_PM1, 4, 0, NULL, 0),
251 SND_SOC_DAPM_PGA("Mono Out", AK4535_PM1, 3, 0, NULL, 0),
252 SND_SOC_DAPM_PGA("AUX In", AK4535_PM1, 2, 0, NULL, 0),
253
254 SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4535_MIC, 3, 0),
255 SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4535_MIC, 4, 0),
256 SND_SOC_DAPM_INPUT("MICIN"),
257 SND_SOC_DAPM_INPUT("MICEXT"),
258 SND_SOC_DAPM_INPUT("AUX"),
259 SND_SOC_DAPM_INPUT("MIN"),
260 SND_SOC_DAPM_INPUT("AIN"),
261 };
262
263 static const struct snd_soc_dapm_route audio_map[] = {
264 /*stereo mixer */
265 {"Stereo Mixer", "Playback Switch", "DAC"},
266 {"Stereo Mixer", "Mic Sidetone Switch", "Mic"},
267 {"Stereo Mixer", "Aux Bypass Switch", "AUX In"},
268
269 /* mono1 mixer */
270 {"Mono1 Mixer", "Mic Sidetone Switch", "Mic"},
271 {"Mono1 Mixer", "Mono Playback Switch", "DAC"},
272
273 /* Mic */
274 {"Mic", NULL, "AIN"},
275 {"Input Mux", "Internal", "Mic Int Bias"},
276 {"Input Mux", "External", "Mic Ext Bias"},
277 {"Mic Int Bias", NULL, "MICIN"},
278 {"Mic Ext Bias", NULL, "MICEXT"},
279 {"MICOUT", NULL, "Input Mux"},
280
281 /* line out */
282 {"LOUT", NULL, "Line Out Enable"},
283 {"ROUT", NULL, "Line Out Enable"},
284 {"Line Out Enable", "Switch", "Line Out"},
285 {"Line Out", NULL, "Stereo Mixer"},
286
287 /* mono1 out */
288 {"MOUT1", NULL, "Mono Out"},
289 {"Mono Out", NULL, "Mono1 Mixer"},
290
291 /* left HP */
292 {"HPL", NULL, "Left HP Enable"},
293 {"Left HP Enable", "Switch", "HP L Amp"},
294 {"HP L Amp", NULL, "Stereo Mixer"},
295
296 /* right HP */
297 {"HPR", NULL, "Right HP Enable"},
298 {"Right HP Enable", "Switch", "HP R Amp"},
299 {"HP R Amp", NULL, "Stereo Mixer"},
300
301 /* speaker */
302 {"SPP", NULL, "Speaker Enable"},
303 {"SPN", NULL, "Speaker Enable"},
304 {"Speaker Enable", "Switch", "Spk Amp"},
305 {"Spk Amp", NULL, "MIN"},
306
307 /* mono 2 */
308 {"MOUT2", NULL, "Mono 2 Enable"},
309 {"Mono 2 Enable", "Switch", "Stereo Mixer"},
310
311 /* Aux In */
312 {"Aux In", NULL, "AUX"},
313
314 /* ADC */
315 {"ADC", NULL, "Input Mixer"},
316 {"Input Mixer", "Mic Capture Switch", "Mic"},
317 {"Input Mixer", "Aux Capture Switch", "Aux In"},
318 };
319
ak4535_add_widgets(struct snd_soc_codec * codec)320 static int ak4535_add_widgets(struct snd_soc_codec *codec)
321 {
322 snd_soc_dapm_new_controls(codec, ak4535_dapm_widgets,
323 ARRAY_SIZE(ak4535_dapm_widgets));
324
325 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
326
327 snd_soc_dapm_new_widgets(codec);
328 return 0;
329 }
330
ak4535_set_dai_sysclk(struct snd_soc_dai * codec_dai,int clk_id,unsigned int freq,int dir)331 static int ak4535_set_dai_sysclk(struct snd_soc_dai *codec_dai,
332 int clk_id, unsigned int freq, int dir)
333 {
334 struct snd_soc_codec *codec = codec_dai->codec;
335 struct ak4535_priv *ak4535 = codec->private_data;
336
337 ak4535->sysclk = freq;
338 return 0;
339 }
340
ak4535_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)341 static int ak4535_hw_params(struct snd_pcm_substream *substream,
342 struct snd_pcm_hw_params *params,
343 struct snd_soc_dai *dai)
344 {
345 struct snd_soc_pcm_runtime *rtd = substream->private_data;
346 struct snd_soc_device *socdev = rtd->socdev;
347 struct snd_soc_codec *codec = socdev->codec;
348 struct ak4535_priv *ak4535 = codec->private_data;
349 u8 mode2 = ak4535_read_reg_cache(codec, AK4535_MODE2) & ~(0x3 << 5);
350 int rate = params_rate(params), fs = 256;
351
352 if (rate)
353 fs = ak4535->sysclk / rate;
354
355 /* set fs */
356 switch (fs) {
357 case 1024:
358 mode2 |= (0x2 << 5);
359 break;
360 case 512:
361 mode2 |= (0x1 << 5);
362 break;
363 case 256:
364 break;
365 }
366
367 /* set rate */
368 ak4535_write(codec, AK4535_MODE2, mode2);
369 return 0;
370 }
371
ak4535_set_dai_fmt(struct snd_soc_dai * codec_dai,unsigned int fmt)372 static int ak4535_set_dai_fmt(struct snd_soc_dai *codec_dai,
373 unsigned int fmt)
374 {
375 struct snd_soc_codec *codec = codec_dai->codec;
376 u8 mode1 = 0;
377
378 /* interface format */
379 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
380 case SND_SOC_DAIFMT_I2S:
381 mode1 = 0x0002;
382 break;
383 case SND_SOC_DAIFMT_LEFT_J:
384 mode1 = 0x0001;
385 break;
386 default:
387 return -EINVAL;
388 }
389
390 /* use 32 fs for BCLK to save power */
391 mode1 |= 0x4;
392
393 ak4535_write(codec, AK4535_MODE1, mode1);
394 return 0;
395 }
396
ak4535_mute(struct snd_soc_dai * dai,int mute)397 static int ak4535_mute(struct snd_soc_dai *dai, int mute)
398 {
399 struct snd_soc_codec *codec = dai->codec;
400 u16 mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC) & 0xffdf;
401 if (!mute)
402 ak4535_write(codec, AK4535_DAC, mute_reg);
403 else
404 ak4535_write(codec, AK4535_DAC, mute_reg | 0x20);
405 return 0;
406 }
407
ak4535_set_bias_level(struct snd_soc_codec * codec,enum snd_soc_bias_level level)408 static int ak4535_set_bias_level(struct snd_soc_codec *codec,
409 enum snd_soc_bias_level level)
410 {
411 u16 i;
412
413 switch (level) {
414 case SND_SOC_BIAS_ON:
415 ak4535_mute(codec->dai, 0);
416 break;
417 case SND_SOC_BIAS_PREPARE:
418 ak4535_mute(codec->dai, 1);
419 break;
420 case SND_SOC_BIAS_STANDBY:
421 i = ak4535_read_reg_cache(codec, AK4535_PM1);
422 ak4535_write(codec, AK4535_PM1, i | 0x80);
423 i = ak4535_read_reg_cache(codec, AK4535_PM2);
424 ak4535_write(codec, AK4535_PM2, i & (~0x80));
425 break;
426 case SND_SOC_BIAS_OFF:
427 i = ak4535_read_reg_cache(codec, AK4535_PM1);
428 ak4535_write(codec, AK4535_PM1, i & (~0x80));
429 break;
430 }
431 codec->bias_level = level;
432 return 0;
433 }
434
435 #define AK4535_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
436 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
437 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
438
439 struct snd_soc_dai ak4535_dai = {
440 .name = "AK4535",
441 .playback = {
442 .stream_name = "Playback",
443 .channels_min = 1,
444 .channels_max = 2,
445 .rates = AK4535_RATES,
446 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
447 .capture = {
448 .stream_name = "Capture",
449 .channels_min = 1,
450 .channels_max = 2,
451 .rates = AK4535_RATES,
452 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
453 .ops = {
454 .hw_params = ak4535_hw_params,
455 .set_fmt = ak4535_set_dai_fmt,
456 .digital_mute = ak4535_mute,
457 .set_sysclk = ak4535_set_dai_sysclk,
458 },
459 };
460 EXPORT_SYMBOL_GPL(ak4535_dai);
461
ak4535_suspend(struct platform_device * pdev,pm_message_t state)462 static int ak4535_suspend(struct platform_device *pdev, pm_message_t state)
463 {
464 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
465 struct snd_soc_codec *codec = socdev->codec;
466
467 ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
468 return 0;
469 }
470
ak4535_resume(struct platform_device * pdev)471 static int ak4535_resume(struct platform_device *pdev)
472 {
473 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
474 struct snd_soc_codec *codec = socdev->codec;
475 ak4535_sync(codec);
476 ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
477 ak4535_set_bias_level(codec, codec->suspend_bias_level);
478 return 0;
479 }
480
481 /*
482 * initialise the AK4535 driver
483 * register the mixer and dsp interfaces with the kernel
484 */
ak4535_init(struct snd_soc_device * socdev)485 static int ak4535_init(struct snd_soc_device *socdev)
486 {
487 struct snd_soc_codec *codec = socdev->codec;
488 int ret = 0;
489
490 codec->name = "AK4535";
491 codec->owner = THIS_MODULE;
492 codec->read = ak4535_read_reg_cache;
493 codec->write = ak4535_write;
494 codec->set_bias_level = ak4535_set_bias_level;
495 codec->dai = &ak4535_dai;
496 codec->num_dai = 1;
497 codec->reg_cache_size = ARRAY_SIZE(ak4535_reg);
498 codec->reg_cache = kmemdup(ak4535_reg, sizeof(ak4535_reg), GFP_KERNEL);
499
500 if (codec->reg_cache == NULL)
501 return -ENOMEM;
502
503 /* register pcms */
504 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
505 if (ret < 0) {
506 printk(KERN_ERR "ak4535: failed to create pcms\n");
507 goto pcm_err;
508 }
509
510 /* power on device */
511 ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
512
513 ak4535_add_controls(codec);
514 ak4535_add_widgets(codec);
515 ret = snd_soc_init_card(socdev);
516 if (ret < 0) {
517 printk(KERN_ERR "ak4535: failed to register card\n");
518 goto card_err;
519 }
520
521 return ret;
522
523 card_err:
524 snd_soc_free_pcms(socdev);
525 snd_soc_dapm_free(socdev);
526 pcm_err:
527 kfree(codec->reg_cache);
528
529 return ret;
530 }
531
532 static struct snd_soc_device *ak4535_socdev;
533
534 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
535
ak4535_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)536 static int ak4535_i2c_probe(struct i2c_client *i2c,
537 const struct i2c_device_id *id)
538 {
539 struct snd_soc_device *socdev = ak4535_socdev;
540 struct snd_soc_codec *codec = socdev->codec;
541 int ret;
542
543 i2c_set_clientdata(i2c, codec);
544 codec->control_data = i2c;
545
546 ret = ak4535_init(socdev);
547 if (ret < 0)
548 printk(KERN_ERR "failed to initialise AK4535\n");
549
550 return ret;
551 }
552
ak4535_i2c_remove(struct i2c_client * client)553 static int ak4535_i2c_remove(struct i2c_client *client)
554 {
555 struct snd_soc_codec *codec = i2c_get_clientdata(client);
556 kfree(codec->reg_cache);
557 return 0;
558 }
559
560 static const struct i2c_device_id ak4535_i2c_id[] = {
561 { "ak4535", 0 },
562 { }
563 };
564 MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id);
565
566 static struct i2c_driver ak4535_i2c_driver = {
567 .driver = {
568 .name = "AK4535 I2C Codec",
569 .owner = THIS_MODULE,
570 },
571 .probe = ak4535_i2c_probe,
572 .remove = ak4535_i2c_remove,
573 .id_table = ak4535_i2c_id,
574 };
575
ak4535_add_i2c_device(struct platform_device * pdev,const struct ak4535_setup_data * setup)576 static int ak4535_add_i2c_device(struct platform_device *pdev,
577 const struct ak4535_setup_data *setup)
578 {
579 struct i2c_board_info info;
580 struct i2c_adapter *adapter;
581 struct i2c_client *client;
582 int ret;
583
584 ret = i2c_add_driver(&ak4535_i2c_driver);
585 if (ret != 0) {
586 dev_err(&pdev->dev, "can't add i2c driver\n");
587 return ret;
588 }
589
590 memset(&info, 0, sizeof(struct i2c_board_info));
591 info.addr = setup->i2c_address;
592 strlcpy(info.type, "ak4535", I2C_NAME_SIZE);
593
594 adapter = i2c_get_adapter(setup->i2c_bus);
595 if (!adapter) {
596 dev_err(&pdev->dev, "can't get i2c adapter %d\n",
597 setup->i2c_bus);
598 goto err_driver;
599 }
600
601 client = i2c_new_device(adapter, &info);
602 i2c_put_adapter(adapter);
603 if (!client) {
604 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
605 (unsigned int)info.addr);
606 goto err_driver;
607 }
608
609 return 0;
610
611 err_driver:
612 i2c_del_driver(&ak4535_i2c_driver);
613 return -ENODEV;
614 }
615 #endif
616
ak4535_probe(struct platform_device * pdev)617 static int ak4535_probe(struct platform_device *pdev)
618 {
619 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
620 struct ak4535_setup_data *setup;
621 struct snd_soc_codec *codec;
622 struct ak4535_priv *ak4535;
623 int ret;
624
625 printk(KERN_INFO "AK4535 Audio Codec %s", AK4535_VERSION);
626
627 setup = socdev->codec_data;
628 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
629 if (codec == NULL)
630 return -ENOMEM;
631
632 ak4535 = kzalloc(sizeof(struct ak4535_priv), GFP_KERNEL);
633 if (ak4535 == NULL) {
634 kfree(codec);
635 return -ENOMEM;
636 }
637
638 codec->private_data = ak4535;
639 socdev->codec = codec;
640 mutex_init(&codec->mutex);
641 INIT_LIST_HEAD(&codec->dapm_widgets);
642 INIT_LIST_HEAD(&codec->dapm_paths);
643
644 ak4535_socdev = socdev;
645 ret = -ENODEV;
646
647 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
648 if (setup->i2c_address) {
649 codec->hw_write = (hw_write_t)i2c_master_send;
650 codec->hw_read = (hw_read_t)i2c_master_recv;
651 ret = ak4535_add_i2c_device(pdev, setup);
652 }
653 #endif
654
655 if (ret != 0) {
656 kfree(codec->private_data);
657 kfree(codec);
658 }
659 return ret;
660 }
661
662 /* power down chip */
ak4535_remove(struct platform_device * pdev)663 static int ak4535_remove(struct platform_device *pdev)
664 {
665 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
666 struct snd_soc_codec *codec = socdev->codec;
667
668 if (codec->control_data)
669 ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
670
671 snd_soc_free_pcms(socdev);
672 snd_soc_dapm_free(socdev);
673 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
674 i2c_unregister_device(codec->control_data);
675 i2c_del_driver(&ak4535_i2c_driver);
676 #endif
677 kfree(codec->private_data);
678 kfree(codec);
679
680 return 0;
681 }
682
683 struct snd_soc_codec_device soc_codec_dev_ak4535 = {
684 .probe = ak4535_probe,
685 .remove = ak4535_remove,
686 .suspend = ak4535_suspend,
687 .resume = ak4535_resume,
688 };
689 EXPORT_SYMBOL_GPL(soc_codec_dev_ak4535);
690
ak4535_modinit(void)691 static int __init ak4535_modinit(void)
692 {
693 return snd_soc_register_dai(&ak4535_dai);
694 }
695 module_init(ak4535_modinit);
696
ak4535_exit(void)697 static void __exit ak4535_exit(void)
698 {
699 snd_soc_unregister_dai(&ak4535_dai);
700 }
701 module_exit(ak4535_exit);
702
703 MODULE_DESCRIPTION("Soc AK4535 driver");
704 MODULE_AUTHOR("Richard Purdie");
705 MODULE_LICENSE("GPL");
706