1/*
2 * wm8776.c  --  WM8776 ALSA SoC Audio driver
3 *
4 * Copyright 2009-12 Wolfson Microelectronics plc
5 *
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * TODO: Input ALC/limiter support
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/of_device.h>
22#include <linux/regmap.h>
23#include <linux/spi/spi.h>
24#include <linux/slab.h>
25#include <sound/core.h>
26#include <sound/pcm.h>
27#include <sound/pcm_params.h>
28#include <sound/soc.h>
29#include <sound/initval.h>
30#include <sound/tlv.h>
31
32#include "wm8776.h"
33
34enum wm8776_chip_type {
35	WM8775 = 1,
36	WM8776,
37};
38
39/* codec private data */
40struct wm8776_priv {
41	struct regmap *regmap;
42	int sysclk[2];
43};
44
45static const struct reg_default wm8776_reg_defaults[] = {
46	{  0, 0x79 },
47	{  1, 0x79 },
48	{  2, 0x79 },
49	{  3, 0xff },
50	{  4, 0xff },
51	{  5, 0xff },
52	{  6, 0x00 },
53	{  7, 0x90 },
54	{  8, 0x00 },
55	{  9, 0x00 },
56	{ 10, 0x22 },
57	{ 11, 0x22 },
58	{ 12, 0x22 },
59	{ 13, 0x08 },
60	{ 14, 0xcf },
61	{ 15, 0xcf },
62	{ 16, 0x7b },
63	{ 17, 0x00 },
64	{ 18, 0x32 },
65	{ 19, 0x00 },
66	{ 20, 0xa6 },
67	{ 21, 0x01 },
68	{ 22, 0x01 },
69};
70
71static bool wm8776_volatile(struct device *dev, unsigned int reg)
72{
73	switch (reg) {
74	case WM8776_RESET:
75		return true;
76	default:
77		return false;
78	}
79}
80
81static int wm8776_reset(struct snd_soc_codec *codec)
82{
83	return snd_soc_write(codec, WM8776_RESET, 0);
84}
85
86static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
87static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
88static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
89
90static const struct snd_kcontrol_new wm8776_snd_controls[] = {
91SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
92		 0, 127, 0, hp_tlv),
93SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
94		 0, 255, 0, dac_tlv),
95SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
96
97SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
98
99SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
100		 0, 255, 0, adc_tlv),
101SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
102SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
103SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
104};
105
106static const struct snd_kcontrol_new inmix_controls[] = {
107SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
108SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
109SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
110SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
111SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
112};
113
114static const struct snd_kcontrol_new outmix_controls[] = {
115SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
116SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
117SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
118};
119
120static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
121SND_SOC_DAPM_INPUT("AUX"),
122
123SND_SOC_DAPM_INPUT("AIN1"),
124SND_SOC_DAPM_INPUT("AIN2"),
125SND_SOC_DAPM_INPUT("AIN3"),
126SND_SOC_DAPM_INPUT("AIN4"),
127SND_SOC_DAPM_INPUT("AIN5"),
128
129SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
130		   inmix_controls, ARRAY_SIZE(inmix_controls)),
131
132SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
133SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
134
135SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
136		   outmix_controls, ARRAY_SIZE(outmix_controls)),
137
138SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
139
140SND_SOC_DAPM_OUTPUT("VOUT"),
141
142SND_SOC_DAPM_OUTPUT("HPOUTL"),
143SND_SOC_DAPM_OUTPUT("HPOUTR"),
144};
145
146static const struct snd_soc_dapm_route routes[] = {
147	{ "Input Mixer", "AIN1 Switch", "AIN1" },
148	{ "Input Mixer", "AIN2 Switch", "AIN2" },
149	{ "Input Mixer", "AIN3 Switch", "AIN3" },
150	{ "Input Mixer", "AIN4 Switch", "AIN4" },
151	{ "Input Mixer", "AIN5 Switch", "AIN5" },
152
153	{ "ADC", NULL, "Input Mixer" },
154
155	{ "Output Mixer", "DAC Switch", "DAC" },
156	{ "Output Mixer", "AUX Switch", "AUX" },
157	{ "Output Mixer", "Bypass Switch", "Input Mixer" },
158
159	{ "VOUT", NULL, "Output Mixer" },
160
161	{ "Headphone PGA", NULL, "Output Mixer" },
162
163	{ "HPOUTL", NULL, "Headphone PGA" },
164	{ "HPOUTR", NULL, "Headphone PGA" },
165};
166
167static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
168{
169	struct snd_soc_codec *codec = dai->codec;
170	int reg, iface, master;
171
172	switch (dai->driver->id) {
173	case WM8776_DAI_DAC:
174		reg = WM8776_DACIFCTRL;
175		master = 0x80;
176		break;
177	case WM8776_DAI_ADC:
178		reg = WM8776_ADCIFCTRL;
179		master = 0x100;
180		break;
181	default:
182		return -EINVAL;
183	}
184
185	iface = 0;
186
187	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
188	case SND_SOC_DAIFMT_CBM_CFM:
189		break;
190	case SND_SOC_DAIFMT_CBS_CFS:
191		master = 0;
192		break;
193	default:
194		return -EINVAL;
195	}
196
197	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
198	case SND_SOC_DAIFMT_I2S:
199		iface |= 0x0002;
200		break;
201	case SND_SOC_DAIFMT_RIGHT_J:
202		break;
203	case SND_SOC_DAIFMT_LEFT_J:
204		iface |= 0x0001;
205		break;
206	default:
207		return -EINVAL;
208	}
209
210	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
211	case SND_SOC_DAIFMT_NB_NF:
212		break;
213	case SND_SOC_DAIFMT_IB_IF:
214		iface |= 0x00c;
215		break;
216	case SND_SOC_DAIFMT_IB_NF:
217		iface |= 0x008;
218		break;
219	case SND_SOC_DAIFMT_NB_IF:
220		iface |= 0x004;
221		break;
222	default:
223		return -EINVAL;
224	}
225
226	/* Finally, write out the values */
227	snd_soc_update_bits(codec, reg, 0xf, iface);
228	snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master);
229
230	return 0;
231}
232
233static int mclk_ratios[] = {
234	128,
235	192,
236	256,
237	384,
238	512,
239	768,
240};
241
242static int wm8776_hw_params(struct snd_pcm_substream *substream,
243			    struct snd_pcm_hw_params *params,
244			    struct snd_soc_dai *dai)
245{
246	struct snd_soc_codec *codec = dai->codec;
247	struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
248	int iface_reg, iface;
249	int ratio_shift, master;
250	int i;
251
252	switch (dai->driver->id) {
253	case WM8776_DAI_DAC:
254		iface_reg = WM8776_DACIFCTRL;
255		master = 0x80;
256		ratio_shift = 4;
257		break;
258	case WM8776_DAI_ADC:
259		iface_reg = WM8776_ADCIFCTRL;
260		master = 0x100;
261		ratio_shift = 0;
262		break;
263	default:
264		return -EINVAL;
265	}
266
267	/* Set word length */
268	switch (snd_pcm_format_width(params_format(params))) {
269	case 16:
270		iface = 0;
271		break;
272	case 20:
273		iface = 0x10;
274		break;
275	case 24:
276		iface = 0x20;
277		break;
278	case 32:
279		iface = 0x30;
280		break;
281	default:
282		dev_err(codec->dev, "Unsupported sample size: %i\n",
283			snd_pcm_format_width(params_format(params)));
284		return -EINVAL;
285	}
286
287	/* Only need to set MCLK/LRCLK ratio if we're master */
288	if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
289		for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
290			if (wm8776->sysclk[dai->driver->id] / params_rate(params)
291			    == mclk_ratios[i])
292				break;
293		}
294
295		if (i == ARRAY_SIZE(mclk_ratios)) {
296			dev_err(codec->dev,
297				"Unable to configure MCLK ratio %d/%d\n",
298				wm8776->sysclk[dai->driver->id], params_rate(params));
299			return -EINVAL;
300		}
301
302		dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
303
304		snd_soc_update_bits(codec, WM8776_MSTRCTRL,
305				    0x7 << ratio_shift, i << ratio_shift);
306	} else {
307		dev_dbg(codec->dev, "DAI in slave mode\n");
308	}
309
310	snd_soc_update_bits(codec, iface_reg, 0x30, iface);
311
312	return 0;
313}
314
315static int wm8776_mute(struct snd_soc_dai *dai, int mute)
316{
317	struct snd_soc_codec *codec = dai->codec;
318
319	return snd_soc_write(codec, WM8776_DACMUTE, !!mute);
320}
321
322static int wm8776_set_sysclk(struct snd_soc_dai *dai,
323			     int clk_id, unsigned int freq, int dir)
324{
325	struct snd_soc_codec *codec = dai->codec;
326	struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
327
328	if (WARN_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk)))
329		return -EINVAL;
330
331	wm8776->sysclk[dai->driver->id] = freq;
332
333	return 0;
334}
335
336static int wm8776_set_bias_level(struct snd_soc_codec *codec,
337				 enum snd_soc_bias_level level)
338{
339	struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
340
341	switch (level) {
342	case SND_SOC_BIAS_ON:
343		break;
344	case SND_SOC_BIAS_PREPARE:
345		break;
346	case SND_SOC_BIAS_STANDBY:
347		if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
348			regcache_sync(wm8776->regmap);
349
350			/* Disable the global powerdown; DAPM does the rest */
351			snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
352		}
353
354		break;
355	case SND_SOC_BIAS_OFF:
356		snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
357		break;
358	}
359
360	codec->dapm.bias_level = level;
361	return 0;
362}
363
364#define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
365			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
366
367static const struct snd_soc_dai_ops wm8776_dac_ops = {
368	.digital_mute	= wm8776_mute,
369	.hw_params      = wm8776_hw_params,
370	.set_fmt        = wm8776_set_fmt,
371	.set_sysclk     = wm8776_set_sysclk,
372};
373
374static const struct snd_soc_dai_ops wm8776_adc_ops = {
375	.hw_params      = wm8776_hw_params,
376	.set_fmt        = wm8776_set_fmt,
377	.set_sysclk     = wm8776_set_sysclk,
378};
379
380static struct snd_soc_dai_driver wm8776_dai[] = {
381	{
382		.name = "wm8776-hifi-playback",
383		.id	= WM8776_DAI_DAC,
384		.playback = {
385			.stream_name = "Playback",
386			.channels_min = 2,
387			.channels_max = 2,
388			.rates = SNDRV_PCM_RATE_CONTINUOUS,
389			.rate_min = 32000,
390			.rate_max = 192000,
391			.formats = WM8776_FORMATS,
392		},
393		.ops = &wm8776_dac_ops,
394	},
395	{
396		.name = "wm8776-hifi-capture",
397		.id	= WM8776_DAI_ADC,
398		.capture = {
399			.stream_name = "Capture",
400			.channels_min = 2,
401			.channels_max = 2,
402			.rates = SNDRV_PCM_RATE_CONTINUOUS,
403			.rate_min = 32000,
404			.rate_max = 96000,
405			.formats = WM8776_FORMATS,
406		},
407		.ops = &wm8776_adc_ops,
408	},
409};
410
411static int wm8776_probe(struct snd_soc_codec *codec)
412{
413	int ret = 0;
414
415	ret = wm8776_reset(codec);
416	if (ret < 0) {
417		dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
418		return ret;
419	}
420
421	/* Latch the update bits; right channel only since we always
422	 * update both. */
423	snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
424	snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);
425
426	return ret;
427}
428
429static struct snd_soc_codec_driver soc_codec_dev_wm8776 = {
430	.probe = 	wm8776_probe,
431	.set_bias_level = wm8776_set_bias_level,
432	.suspend_bias_off = true,
433
434	.controls = wm8776_snd_controls,
435	.num_controls = ARRAY_SIZE(wm8776_snd_controls),
436	.dapm_widgets = wm8776_dapm_widgets,
437	.num_dapm_widgets = ARRAY_SIZE(wm8776_dapm_widgets),
438	.dapm_routes = routes,
439	.num_dapm_routes = ARRAY_SIZE(routes),
440};
441
442static const struct of_device_id wm8776_of_match[] = {
443	{ .compatible = "wlf,wm8776", },
444	{ }
445};
446MODULE_DEVICE_TABLE(of, wm8776_of_match);
447
448static const struct regmap_config wm8776_regmap = {
449	.reg_bits = 7,
450	.val_bits = 9,
451	.max_register = WM8776_RESET,
452
453	.reg_defaults = wm8776_reg_defaults,
454	.num_reg_defaults = ARRAY_SIZE(wm8776_reg_defaults),
455	.cache_type = REGCACHE_RBTREE,
456
457	.volatile_reg = wm8776_volatile,
458};
459
460#if defined(CONFIG_SPI_MASTER)
461static int wm8776_spi_probe(struct spi_device *spi)
462{
463	struct wm8776_priv *wm8776;
464	int ret;
465
466	wm8776 = devm_kzalloc(&spi->dev, sizeof(struct wm8776_priv),
467			      GFP_KERNEL);
468	if (wm8776 == NULL)
469		return -ENOMEM;
470
471	wm8776->regmap = devm_regmap_init_spi(spi, &wm8776_regmap);
472	if (IS_ERR(wm8776->regmap))
473		return PTR_ERR(wm8776->regmap);
474
475	spi_set_drvdata(spi, wm8776);
476
477	ret = snd_soc_register_codec(&spi->dev,
478			&soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
479
480	return ret;
481}
482
483static int wm8776_spi_remove(struct spi_device *spi)
484{
485	snd_soc_unregister_codec(&spi->dev);
486	return 0;
487}
488
489static struct spi_driver wm8776_spi_driver = {
490	.driver = {
491		.name	= "wm8776",
492		.owner	= THIS_MODULE,
493		.of_match_table = wm8776_of_match,
494	},
495	.probe		= wm8776_spi_probe,
496	.remove		= wm8776_spi_remove,
497};
498#endif /* CONFIG_SPI_MASTER */
499
500#if IS_ENABLED(CONFIG_I2C)
501static int wm8776_i2c_probe(struct i2c_client *i2c,
502			    const struct i2c_device_id *id)
503{
504	struct wm8776_priv *wm8776;
505	int ret;
506
507	wm8776 = devm_kzalloc(&i2c->dev, sizeof(struct wm8776_priv),
508			      GFP_KERNEL);
509	if (wm8776 == NULL)
510		return -ENOMEM;
511
512	wm8776->regmap = devm_regmap_init_i2c(i2c, &wm8776_regmap);
513	if (IS_ERR(wm8776->regmap))
514		return PTR_ERR(wm8776->regmap);
515
516	i2c_set_clientdata(i2c, wm8776);
517
518	ret =  snd_soc_register_codec(&i2c->dev,
519			&soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
520
521	return ret;
522}
523
524static int wm8776_i2c_remove(struct i2c_client *client)
525{
526	snd_soc_unregister_codec(&client->dev);
527	return 0;
528}
529
530static const struct i2c_device_id wm8776_i2c_id[] = {
531	{ "wm8775", WM8775 },
532	{ "wm8776", WM8776 },
533	{ }
534};
535MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
536
537static struct i2c_driver wm8776_i2c_driver = {
538	.driver = {
539		.name = "wm8776",
540		.owner = THIS_MODULE,
541		.of_match_table = wm8776_of_match,
542	},
543	.probe =    wm8776_i2c_probe,
544	.remove =   wm8776_i2c_remove,
545	.id_table = wm8776_i2c_id,
546};
547#endif
548
549static int __init wm8776_modinit(void)
550{
551	int ret = 0;
552#if IS_ENABLED(CONFIG_I2C)
553	ret = i2c_add_driver(&wm8776_i2c_driver);
554	if (ret != 0) {
555		printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n",
556		       ret);
557	}
558#endif
559#if defined(CONFIG_SPI_MASTER)
560	ret = spi_register_driver(&wm8776_spi_driver);
561	if (ret != 0) {
562		printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n",
563		       ret);
564	}
565#endif
566	return ret;
567}
568module_init(wm8776_modinit);
569
570static void __exit wm8776_exit(void)
571{
572#if IS_ENABLED(CONFIG_I2C)
573	i2c_del_driver(&wm8776_i2c_driver);
574#endif
575#if defined(CONFIG_SPI_MASTER)
576	spi_unregister_driver(&wm8776_spi_driver);
577#endif
578}
579module_exit(wm8776_exit);
580
581MODULE_DESCRIPTION("ASoC WM8776 driver");
582MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
583MODULE_LICENSE("GPL");
584