xref: /openbmc/linux/sound/soc/codecs/ak4535.c (revision 9abcd240)
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 */
29 struct ak4535_priv {
30 	struct regmap *regmap;
31 	unsigned int sysclk;
32 };
33 
34 /*
35  * ak4535 register cache
36  */
37 static 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 
ak4535_volatile(struct device * dev,unsigned int reg)55 static 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 
65 static const char *ak4535_mono_gain[] = {"+6dB", "-17dB"};
66 static const char *ak4535_mono_out[] = {"(L + R)/2", "Hi-Z"};
67 static const char *ak4535_hp_out[] = {"Stereo", "Mono"};
68 static const char *ak4535_deemp[] = {"44.1kHz", "Off", "48kHz", "32kHz"};
69 static const char *ak4535_mic_select[] = {"Internal", "External"};
70 
71 static 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 
79 static 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 */
102 static 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 */
108 static 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 */
115 static 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 */
121 static const struct snd_kcontrol_new ak4535_input_mux_control =
122 	SOC_DAPM_ENUM("Input Select", ak4535_enum[4]);
123 
124 /* HP L switch */
125 static const struct snd_kcontrol_new ak4535_hpl_control =
126 	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1);
127 
128 /* HP R switch */
129 static const struct snd_kcontrol_new ak4535_hpr_control =
130 	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1);
131 
132 /* mono 2 switch */
133 static const struct snd_kcontrol_new ak4535_mono2_control =
134 	SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0);
135 
136 /* Line out switch */
137 static const struct snd_kcontrol_new ak4535_line_control =
138 	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0);
139 
140 /* ak4535 dapm widgets */
141 static 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 
191 static 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 
ak4535_set_dai_sysclk(struct snd_soc_dai * codec_dai,int clk_id,unsigned int freq,int dir)248 static 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 
ak4535_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)258 static 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 
ak4535_set_dai_fmt(struct snd_soc_dai * codec_dai,unsigned int fmt)287 static 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 
ak4535_mute(struct snd_soc_dai * dai,int mute,int direction)312 static 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 
ak4535_set_bias_level(struct snd_soc_component * component,enum snd_soc_bias_level level)324 static 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 
349 static 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 
357 static 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 
ak4535_resume(struct snd_soc_component * component)374 static int ak4535_resume(struct snd_soc_component *component)
375 {
376 	snd_soc_component_cache_sync(component);
377 	return 0;
378 }
379 
380 static 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 
392 static 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 
ak4535_i2c_probe(struct i2c_client * i2c)407 static 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 
432 static const struct i2c_device_id ak4535_i2c_id[] = {
433 	{ "ak4535", 0 },
434 	{ }
435 };
436 MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id);
437 
438 static 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 
446 module_i2c_driver(ak4535_i2c_driver);
447 
448 MODULE_DESCRIPTION("Soc AK4535 driver");
449 MODULE_AUTHOR("Richard Purdie");
450 MODULE_LICENSE("GPL");
451