1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * ak4535.c  --  AK4535 ALSA Soc Audio driver
4 *
5 * Copyright 2005 Openedhand Ltd.
6 *
7 * Author: Richard Purdie <richard@openedhand.com>
8 *
9 * Based on wm8753.c by Liam Girdwood
10 */
11
12#include <linux/module.h>
13#include <linux/moduleparam.h>
14#include <linux/init.h>
15#include <linux/delay.h>
16#include <linux/pm.h>
17#include <linux/i2c.h>
18#include <linux/regmap.h>
19#include <linux/slab.h>
20#include <sound/core.h>
21#include <sound/pcm.h>
22#include <sound/pcm_params.h>
23#include <sound/soc.h>
24#include <sound/initval.h>
25
26#include "ak4535.h"
27
28/* codec private data */
29struct ak4535_priv {
30	struct regmap *regmap;
31	unsigned int sysclk;
32};
33
34/*
35 * ak4535 register cache
36 */
37static const struct reg_default ak4535_reg_defaults[] = {
38	{ 0, 0x00 },
39	{ 1, 0x80 },
40	{ 2, 0x00 },
41	{ 3, 0x03 },
42	{ 4, 0x02 },
43	{ 5, 0x00 },
44	{ 6, 0x11 },
45	{ 7, 0x01 },
46	{ 8, 0x00 },
47	{ 9, 0x40 },
48	{ 10, 0x36 },
49	{ 11, 0x10 },
50	{ 12, 0x00 },
51	{ 13, 0x00 },
52	{ 14, 0x57 },
53};
54
55static bool ak4535_volatile(struct device *dev, unsigned int reg)
56{
57	switch (reg) {
58	case AK4535_STATUS:
59		return true;
60	default:
61		return false;
62	}
63}
64
65static const char *ak4535_mono_gain[] = {"+6dB", "-17dB"};
66static const char *ak4535_mono_out[] = {"(L + R)/2", "Hi-Z"};
67static const char *ak4535_hp_out[] = {"Stereo", "Mono"};
68static const char *ak4535_deemp[] = {"44.1kHz", "Off", "48kHz", "32kHz"};
69static const char *ak4535_mic_select[] = {"Internal", "External"};
70
71static const struct soc_enum ak4535_enum[] = {
72	SOC_ENUM_SINGLE(AK4535_SIG1, 7, 2, ak4535_mono_gain),
73	SOC_ENUM_SINGLE(AK4535_SIG1, 6, 2, ak4535_mono_out),
74	SOC_ENUM_SINGLE(AK4535_MODE2, 2, 2, ak4535_hp_out),
75	SOC_ENUM_SINGLE(AK4535_DAC, 0, 4, ak4535_deemp),
76	SOC_ENUM_SINGLE(AK4535_MIC, 1, 2, ak4535_mic_select),
77};
78
79static const struct snd_kcontrol_new ak4535_snd_controls[] = {
80	SOC_SINGLE("ALC2 Switch", AK4535_SIG1, 1, 1, 0),
81	SOC_ENUM("Mono 1 Output", ak4535_enum[1]),
82	SOC_ENUM("Mono 1 Gain", ak4535_enum[0]),
83	SOC_ENUM("Headphone Output", ak4535_enum[2]),
84	SOC_ENUM("Playback Deemphasis", ak4535_enum[3]),
85	SOC_SINGLE("Bass Volume", AK4535_DAC, 2, 3, 0),
86	SOC_SINGLE("Mic Boost (+20dB) Switch", AK4535_MIC, 0, 1, 0),
87	SOC_ENUM("Mic Select", ak4535_enum[4]),
88	SOC_SINGLE("ALC Operation Time", AK4535_TIMER, 0, 3, 0),
89	SOC_SINGLE("ALC Recovery Time", AK4535_TIMER, 2, 3, 0),
90	SOC_SINGLE("ALC ZC Time", AK4535_TIMER, 4, 3, 0),
91	SOC_SINGLE("ALC 1 Switch", AK4535_ALC1, 5, 1, 0),
92	SOC_SINGLE("ALC 2 Switch", AK4535_ALC1, 6, 1, 0),
93	SOC_SINGLE("ALC Volume", AK4535_ALC2, 0, 127, 0),
94	SOC_SINGLE("Capture Volume", AK4535_PGA, 0, 127, 0),
95	SOC_SINGLE("Left Playback Volume", AK4535_LATT, 0, 127, 1),
96	SOC_SINGLE("Right Playback Volume", AK4535_RATT, 0, 127, 1),
97	SOC_SINGLE("AUX Bypass Volume", AK4535_VOL, 0, 15, 0),
98	SOC_SINGLE("Mic Sidetone Volume", AK4535_VOL, 4, 7, 0),
99};
100
101/* Mono 1 Mixer */
102static const struct snd_kcontrol_new ak4535_mono1_mixer_controls[] = {
103	SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG1, 4, 1, 0),
104	SOC_DAPM_SINGLE("Mono Playback Switch", AK4535_SIG1, 5, 1, 0),
105};
106
107/* Stereo Mixer */
108static const struct snd_kcontrol_new ak4535_stereo_mixer_controls[] = {
109	SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG2, 4, 1, 0),
110	SOC_DAPM_SINGLE("Playback Switch", AK4535_SIG2, 7, 1, 0),
111	SOC_DAPM_SINGLE("Aux Bypass Switch", AK4535_SIG2, 5, 1, 0),
112};
113
114/* Input Mixer */
115static const struct snd_kcontrol_new ak4535_input_mixer_controls[] = {
116	SOC_DAPM_SINGLE("Mic Capture Switch", AK4535_MIC, 2, 1, 0),
117	SOC_DAPM_SINGLE("Aux Capture Switch", AK4535_MIC, 5, 1, 0),
118};
119
120/* Input mux */
121static const struct snd_kcontrol_new ak4535_input_mux_control =
122	SOC_DAPM_ENUM("Input Select", ak4535_enum[4]);
123
124/* HP L switch */
125static const struct snd_kcontrol_new ak4535_hpl_control =
126	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1);
127
128/* HP R switch */
129static const struct snd_kcontrol_new ak4535_hpr_control =
130	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1);
131
132/* mono 2 switch */
133static const struct snd_kcontrol_new ak4535_mono2_control =
134	SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0);
135
136/* Line out switch */
137static const struct snd_kcontrol_new ak4535_line_control =
138	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0);
139
140/* ak4535 dapm widgets */
141static const struct snd_soc_dapm_widget ak4535_dapm_widgets[] = {
142	SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0,
143		&ak4535_stereo_mixer_controls[0],
144		ARRAY_SIZE(ak4535_stereo_mixer_controls)),
145	SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0,
146		&ak4535_mono1_mixer_controls[0],
147		ARRAY_SIZE(ak4535_mono1_mixer_controls)),
148	SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0,
149		&ak4535_input_mixer_controls[0],
150		ARRAY_SIZE(ak4535_input_mixer_controls)),
151	SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
152		&ak4535_input_mux_control),
153	SND_SOC_DAPM_DAC("DAC", "Playback", AK4535_PM2, 0, 0),
154	SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0,
155		&ak4535_mono2_control),
156	/* speaker powersave bit */
157	SND_SOC_DAPM_PGA("Speaker Enable", AK4535_MODE2, 0, 0, NULL, 0),
158	SND_SOC_DAPM_SWITCH("Line Out Enable", SND_SOC_NOPM, 0, 0,
159		&ak4535_line_control),
160	SND_SOC_DAPM_SWITCH("Left HP Enable", SND_SOC_NOPM, 0, 0,
161		&ak4535_hpl_control),
162	SND_SOC_DAPM_SWITCH("Right HP Enable", SND_SOC_NOPM, 0, 0,
163		&ak4535_hpr_control),
164	SND_SOC_DAPM_OUTPUT("LOUT"),
165	SND_SOC_DAPM_OUTPUT("HPL"),
166	SND_SOC_DAPM_OUTPUT("ROUT"),
167	SND_SOC_DAPM_OUTPUT("HPR"),
168	SND_SOC_DAPM_OUTPUT("SPP"),
169	SND_SOC_DAPM_OUTPUT("SPN"),
170	SND_SOC_DAPM_OUTPUT("MOUT1"),
171	SND_SOC_DAPM_OUTPUT("MOUT2"),
172	SND_SOC_DAPM_OUTPUT("MICOUT"),
173	SND_SOC_DAPM_ADC("ADC", "Capture", AK4535_PM1, 0, 0),
174	SND_SOC_DAPM_PGA("Spk Amp", AK4535_PM2, 3, 0, NULL, 0),
175	SND_SOC_DAPM_PGA("HP R Amp", AK4535_PM2, 1, 0, NULL, 0),
176	SND_SOC_DAPM_PGA("HP L Amp", AK4535_PM2, 2, 0, NULL, 0),
177	SND_SOC_DAPM_PGA("Mic", AK4535_PM1, 1, 0, NULL, 0),
178	SND_SOC_DAPM_PGA("Line Out", AK4535_PM1, 4, 0, NULL, 0),
179	SND_SOC_DAPM_PGA("Mono Out", AK4535_PM1, 3, 0, NULL, 0),
180	SND_SOC_DAPM_PGA("AUX In", AK4535_PM1, 2, 0, NULL, 0),
181
182	SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4535_MIC, 3, 0),
183	SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4535_MIC, 4, 0),
184	SND_SOC_DAPM_INPUT("MICIN"),
185	SND_SOC_DAPM_INPUT("MICEXT"),
186	SND_SOC_DAPM_INPUT("AUX"),
187	SND_SOC_DAPM_INPUT("MIN"),
188	SND_SOC_DAPM_INPUT("AIN"),
189};
190
191static const struct snd_soc_dapm_route ak4535_audio_map[] = {
192	/*stereo mixer */
193	{"Stereo Mixer", "Playback Switch", "DAC"},
194	{"Stereo Mixer", "Mic Sidetone Switch", "Mic"},
195	{"Stereo Mixer", "Aux Bypass Switch", "AUX In"},
196
197	/* mono1 mixer */
198	{"Mono1 Mixer", "Mic Sidetone Switch", "Mic"},
199	{"Mono1 Mixer", "Mono Playback Switch", "DAC"},
200
201	/* Mic */
202	{"Mic", NULL, "AIN"},
203	{"Input Mux", "Internal", "Mic Int Bias"},
204	{"Input Mux", "External", "Mic Ext Bias"},
205	{"Mic Int Bias", NULL, "MICIN"},
206	{"Mic Ext Bias", NULL, "MICEXT"},
207	{"MICOUT", NULL, "Input Mux"},
208
209	/* line out */
210	{"LOUT", NULL, "Line Out Enable"},
211	{"ROUT", NULL, "Line Out Enable"},
212	{"Line Out Enable", "Switch", "Line Out"},
213	{"Line Out", NULL, "Stereo Mixer"},
214
215	/* mono1 out */
216	{"MOUT1", NULL, "Mono Out"},
217	{"Mono Out", NULL, "Mono1 Mixer"},
218
219	/* left HP */
220	{"HPL", NULL, "Left HP Enable"},
221	{"Left HP Enable", "Switch", "HP L Amp"},
222	{"HP L Amp", NULL, "Stereo Mixer"},
223
224	/* right HP */
225	{"HPR", NULL, "Right HP Enable"},
226	{"Right HP Enable", "Switch", "HP R Amp"},
227	{"HP R Amp", NULL, "Stereo Mixer"},
228
229	/* speaker */
230	{"SPP", NULL, "Speaker Enable"},
231	{"SPN", NULL, "Speaker Enable"},
232	{"Speaker Enable", "Switch", "Spk Amp"},
233	{"Spk Amp", NULL, "MIN"},
234
235	/* mono 2 */
236	{"MOUT2", NULL, "Mono 2 Enable"},
237	{"Mono 2 Enable", "Switch", "Stereo Mixer"},
238
239	/* Aux In */
240	{"Aux In", NULL, "AUX"},
241
242	/* ADC */
243	{"ADC", NULL, "Input Mixer"},
244	{"Input Mixer", "Mic Capture Switch", "Mic"},
245	{"Input Mixer", "Aux Capture Switch", "Aux In"},
246};
247
248static int ak4535_set_dai_sysclk(struct snd_soc_dai *codec_dai,
249	int clk_id, unsigned int freq, int dir)
250{
251	struct snd_soc_component *component = codec_dai->component;
252	struct ak4535_priv *ak4535 = snd_soc_component_get_drvdata(component);
253
254	ak4535->sysclk = freq;
255	return 0;
256}
257
258static int ak4535_hw_params(struct snd_pcm_substream *substream,
259			    struct snd_pcm_hw_params *params,
260			    struct snd_soc_dai *dai)
261{
262	struct snd_soc_component *component = dai->component;
263	struct ak4535_priv *ak4535 = snd_soc_component_get_drvdata(component);
264	u8 mode2 = snd_soc_component_read(component, AK4535_MODE2) & ~(0x3 << 5);
265	int rate = params_rate(params), fs = 256;
266
267	if (rate)
268		fs = ak4535->sysclk / rate;
269
270	/* set fs */
271	switch (fs) {
272	case 1024:
273		mode2 |= (0x2 << 5);
274		break;
275	case 512:
276		mode2 |= (0x1 << 5);
277		break;
278	case 256:
279		break;
280	}
281
282	/* set rate */
283	snd_soc_component_write(component, AK4535_MODE2, mode2);
284	return 0;
285}
286
287static int ak4535_set_dai_fmt(struct snd_soc_dai *codec_dai,
288		unsigned int fmt)
289{
290	struct snd_soc_component *component = codec_dai->component;
291	u8 mode1 = 0;
292
293	/* interface format */
294	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
295	case SND_SOC_DAIFMT_I2S:
296		mode1 = 0x0002;
297		break;
298	case SND_SOC_DAIFMT_LEFT_J:
299		mode1 = 0x0001;
300		break;
301	default:
302		return -EINVAL;
303	}
304
305	/* use 32 fs for BCLK to save power */
306	mode1 |= 0x4;
307
308	snd_soc_component_write(component, AK4535_MODE1, mode1);
309	return 0;
310}
311
312static int ak4535_mute(struct snd_soc_dai *dai, int mute, int direction)
313{
314	struct snd_soc_component *component = dai->component;
315	u16 mute_reg = snd_soc_component_read(component, AK4535_DAC);
316
317	if (!mute)
318		snd_soc_component_write(component, AK4535_DAC, mute_reg & ~0x20);
319	else
320		snd_soc_component_write(component, AK4535_DAC, mute_reg | 0x20);
321	return 0;
322}
323
324static int ak4535_set_bias_level(struct snd_soc_component *component,
325	enum snd_soc_bias_level level)
326{
327	switch (level) {
328	case SND_SOC_BIAS_ON:
329		snd_soc_component_update_bits(component, AK4535_DAC, 0x20, 0);
330		break;
331	case SND_SOC_BIAS_PREPARE:
332		snd_soc_component_update_bits(component, AK4535_DAC, 0x20, 0x20);
333		break;
334	case SND_SOC_BIAS_STANDBY:
335		snd_soc_component_update_bits(component, AK4535_PM1, 0x80, 0x80);
336		snd_soc_component_update_bits(component, AK4535_PM2, 0x80, 0);
337		break;
338	case SND_SOC_BIAS_OFF:
339		snd_soc_component_update_bits(component, AK4535_PM1, 0x80, 0);
340		break;
341	}
342	return 0;
343}
344
345#define AK4535_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
346		SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
347		SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
348
349static const struct snd_soc_dai_ops ak4535_dai_ops = {
350	.hw_params	= ak4535_hw_params,
351	.set_fmt	= ak4535_set_dai_fmt,
352	.mute_stream	= ak4535_mute,
353	.set_sysclk	= ak4535_set_dai_sysclk,
354	.no_capture_mute = 1,
355};
356
357static struct snd_soc_dai_driver ak4535_dai = {
358	.name = "ak4535-hifi",
359	.playback = {
360		.stream_name = "Playback",
361		.channels_min = 1,
362		.channels_max = 2,
363		.rates = AK4535_RATES,
364		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
365	.capture = {
366		.stream_name = "Capture",
367		.channels_min = 1,
368		.channels_max = 2,
369		.rates = AK4535_RATES,
370		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
371	.ops = &ak4535_dai_ops,
372};
373
374static int ak4535_resume(struct snd_soc_component *component)
375{
376	snd_soc_component_cache_sync(component);
377	return 0;
378}
379
380static const struct regmap_config ak4535_regmap = {
381	.reg_bits = 8,
382	.val_bits = 8,
383
384	.max_register = AK4535_STATUS,
385	.volatile_reg = ak4535_volatile,
386
387	.cache_type = REGCACHE_RBTREE,
388	.reg_defaults = ak4535_reg_defaults,
389	.num_reg_defaults = ARRAY_SIZE(ak4535_reg_defaults),
390};
391
392static const struct snd_soc_component_driver soc_component_dev_ak4535 = {
393	.resume			= ak4535_resume,
394	.set_bias_level		= ak4535_set_bias_level,
395	.controls		= ak4535_snd_controls,
396	.num_controls		= ARRAY_SIZE(ak4535_snd_controls),
397	.dapm_widgets		= ak4535_dapm_widgets,
398	.num_dapm_widgets	= ARRAY_SIZE(ak4535_dapm_widgets),
399	.dapm_routes		= ak4535_audio_map,
400	.num_dapm_routes	= ARRAY_SIZE(ak4535_audio_map),
401	.suspend_bias_off	= 1,
402	.idle_bias_on		= 1,
403	.use_pmdown_time	= 1,
404	.endianness		= 1,
405};
406
407static int ak4535_i2c_probe(struct i2c_client *i2c)
408{
409	struct ak4535_priv *ak4535;
410	int ret;
411
412	ak4535 = devm_kzalloc(&i2c->dev, sizeof(struct ak4535_priv),
413			      GFP_KERNEL);
414	if (ak4535 == NULL)
415		return -ENOMEM;
416
417	ak4535->regmap = devm_regmap_init_i2c(i2c, &ak4535_regmap);
418	if (IS_ERR(ak4535->regmap)) {
419		ret = PTR_ERR(ak4535->regmap);
420		dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
421		return ret;
422	}
423
424	i2c_set_clientdata(i2c, ak4535);
425
426	ret = devm_snd_soc_register_component(&i2c->dev,
427			&soc_component_dev_ak4535, &ak4535_dai, 1);
428
429	return ret;
430}
431
432static const struct i2c_device_id ak4535_i2c_id[] = {
433	{ "ak4535", 0 },
434	{ }
435};
436MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id);
437
438static struct i2c_driver ak4535_i2c_driver = {
439	.driver = {
440		.name = "ak4535",
441	},
442	.probe = ak4535_i2c_probe,
443	.id_table = ak4535_i2c_id,
444};
445
446module_i2c_driver(ak4535_i2c_driver);
447
448MODULE_DESCRIPTION("Soc AK4535 driver");
449MODULE_AUTHOR("Richard Purdie");
450MODULE_LICENSE("GPL");
451