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 */
32struct ak4535_priv {
33	struct regmap *regmap;
34	unsigned int sysclk;
35};
36
37/*
38 * ak4535 register cache
39 */
40static 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
58static 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
68static const char *ak4535_mono_gain[] = {"+6dB", "-17dB"};
69static const char *ak4535_mono_out[] = {"(L + R)/2", "Hi-Z"};
70static const char *ak4535_hp_out[] = {"Stereo", "Mono"};
71static const char *ak4535_deemp[] = {"44.1kHz", "Off", "48kHz", "32kHz"};
72static const char *ak4535_mic_select[] = {"Internal", "External"};
73
74static 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
82static 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 */
105static 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 */
111static 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 */
118static 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 */
124static const struct snd_kcontrol_new ak4535_input_mux_control =
125	SOC_DAPM_ENUM("Input Select", ak4535_enum[4]);
126
127/* HP L switch */
128static const struct snd_kcontrol_new ak4535_hpl_control =
129	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1);
130
131/* HP R switch */
132static const struct snd_kcontrol_new ak4535_hpr_control =
133	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1);
134
135/* mono 2 switch */
136static const struct snd_kcontrol_new ak4535_mono2_control =
137	SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0);
138
139/* Line out switch */
140static const struct snd_kcontrol_new ak4535_line_control =
141	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0);
142
143/* ak4535 dapm widgets */
144static 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
194static 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
251static 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
261static 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
290static 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
315static 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
326static 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
352static 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
359static 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
376static int ak4535_resume(struct snd_soc_codec *codec)
377{
378	snd_soc_cache_sync(codec);
379	return 0;
380}
381
382static const struct regmap_config ak4535_regmap = {
383	.reg_bits = 8,
384	.val_bits = 8,
385
386	.max_register = AK4535_STATUS,
387	.volatile_reg = ak4535_volatile,
388
389	.cache_type = REGCACHE_RBTREE,
390	.reg_defaults = ak4535_reg_defaults,
391	.num_reg_defaults = ARRAY_SIZE(ak4535_reg_defaults),
392};
393
394static struct snd_soc_codec_driver soc_codec_dev_ak4535 = {
395	.resume =	ak4535_resume,
396	.set_bias_level = ak4535_set_bias_level,
397	.suspend_bias_off = true,
398
399	.controls = ak4535_snd_controls,
400	.num_controls = ARRAY_SIZE(ak4535_snd_controls),
401	.dapm_widgets = ak4535_dapm_widgets,
402	.num_dapm_widgets = ARRAY_SIZE(ak4535_dapm_widgets),
403	.dapm_routes = ak4535_audio_map,
404	.num_dapm_routes = ARRAY_SIZE(ak4535_audio_map),
405};
406
407static int ak4535_i2c_probe(struct i2c_client *i2c,
408			    const struct i2c_device_id *id)
409{
410	struct ak4535_priv *ak4535;
411	int ret;
412
413	ak4535 = devm_kzalloc(&i2c->dev, sizeof(struct ak4535_priv),
414			      GFP_KERNEL);
415	if (ak4535 == NULL)
416		return -ENOMEM;
417
418	ak4535->regmap = devm_regmap_init_i2c(i2c, &ak4535_regmap);
419	if (IS_ERR(ak4535->regmap)) {
420		ret = PTR_ERR(ak4535->regmap);
421		dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
422		return ret;
423	}
424
425	i2c_set_clientdata(i2c, ak4535);
426
427	ret = snd_soc_register_codec(&i2c->dev,
428			&soc_codec_dev_ak4535, &ak4535_dai, 1);
429
430	return ret;
431}
432
433static int ak4535_i2c_remove(struct i2c_client *client)
434{
435	snd_soc_unregister_codec(&client->dev);
436	return 0;
437}
438
439static const struct i2c_device_id ak4535_i2c_id[] = {
440	{ "ak4535", 0 },
441	{ }
442};
443MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id);
444
445static struct i2c_driver ak4535_i2c_driver = {
446	.driver = {
447		.name = "ak4535",
448		.owner = THIS_MODULE,
449	},
450	.probe =    ak4535_i2c_probe,
451	.remove =   ak4535_i2c_remove,
452	.id_table = ak4535_i2c_id,
453};
454
455module_i2c_driver(ak4535_i2c_driver);
456
457MODULE_DESCRIPTION("Soc AK4535 driver");
458MODULE_AUTHOR("Richard Purdie");
459MODULE_LICENSE("GPL");
460