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Grant Likelyd8e3bb72008-07-29 11:42:31 +01001/*
2 * Texas Instruments TLV320AIC26 low power audio CODEC
3 * ALSA SoC CODEC driver
4 *
5 * Copyright (C) 2008 Secret Lab Technologies Ltd.
6 */
7
8#include <linux/module.h>
9#include <linux/moduleparam.h>
10#include <linux/init.h>
11#include <linux/delay.h>
12#include <linux/pm.h>
13#include <linux/device.h>
14#include <linux/sysfs.h>
15#include <linux/spi/spi.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090016#include <linux/slab.h>
Grant Likelyd8e3bb72008-07-29 11:42:31 +010017#include <sound/core.h>
18#include <sound/pcm.h>
19#include <sound/pcm_params.h>
20#include <sound/soc.h>
Grant Likelyd8e3bb72008-07-29 11:42:31 +010021#include <sound/initval.h>
22
23#include "tlv320aic26.h"
24
25MODULE_DESCRIPTION("ASoC TLV320AIC26 codec driver");
26MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
27MODULE_LICENSE("GPL");
28
29/* AIC26 driver private data */
30struct aic26 {
31 struct spi_device *spi;
Mark Brown7fbdeb82013-09-25 13:29:44 +010032 struct regmap *regmap;
Lars-Peter Clausenf8f11792013-08-06 13:39:29 +020033 struct snd_soc_codec *codec;
Grant Likelyd8e3bb72008-07-29 11:42:31 +010034 int master;
35 int datfm;
36 int mclk;
37
38 /* Keyclick parameters */
39 int keyclick_amplitude;
40 int keyclick_freq;
41 int keyclick_len;
42};
43
Mark Brown4a11bc22013-08-16 12:24:47 +010044static const struct snd_soc_dapm_widget tlv320aic26_dapm_widgets[] = {
45SND_SOC_DAPM_INPUT("MICIN"),
46SND_SOC_DAPM_INPUT("AUX"),
47
48SND_SOC_DAPM_OUTPUT("HPL"),
49SND_SOC_DAPM_OUTPUT("HPR"),
50};
51
52static const struct snd_soc_dapm_route tlv320aic26_dapm_routes[] = {
53 { "Capture", NULL, "MICIN" },
54 { "Capture", NULL, "AUX" },
55
56 { "HPL", NULL, "Playback" },
57 { "HPR", NULL, "Playback" },
58};
59
Grant Likelyd8e3bb72008-07-29 11:42:31 +010060/* ---------------------------------------------------------------------
61 * Digital Audio Interface Operations
62 */
63static int aic26_hw_params(struct snd_pcm_substream *substream,
Mark Browndee89c42008-11-18 22:11:38 +000064 struct snd_pcm_hw_params *params,
65 struct snd_soc_dai *dai)
Grant Likelyd8e3bb72008-07-29 11:42:31 +010066{
Mark Browne6968a12012-04-04 15:58:16 +010067 struct snd_soc_codec *codec = dai->codec;
Takashi Iwaid4a8ca22010-04-20 08:20:31 +020068 struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
Grant Likelyd8e3bb72008-07-29 11:42:31 +010069 int fsref, divisor, wlen, pval, jval, dval, qval;
70 u16 reg;
71
72 dev_dbg(&aic26->spi->dev, "aic26_hw_params(substream=%p, params=%p)\n",
73 substream, params);
74 dev_dbg(&aic26->spi->dev, "rate=%i format=%i\n", params_rate(params),
75 params_format(params));
76
77 switch (params_rate(params)) {
78 case 8000: fsref = 48000; divisor = AIC26_DIV_6; break;
79 case 11025: fsref = 44100; divisor = AIC26_DIV_4; break;
80 case 12000: fsref = 48000; divisor = AIC26_DIV_4; break;
81 case 16000: fsref = 48000; divisor = AIC26_DIV_3; break;
82 case 22050: fsref = 44100; divisor = AIC26_DIV_2; break;
83 case 24000: fsref = 48000; divisor = AIC26_DIV_2; break;
84 case 32000: fsref = 48000; divisor = AIC26_DIV_1_5; break;
85 case 44100: fsref = 44100; divisor = AIC26_DIV_1; break;
86 case 48000: fsref = 48000; divisor = AIC26_DIV_1; break;
87 default:
88 dev_dbg(&aic26->spi->dev, "bad rate\n"); return -EINVAL;
89 }
90
91 /* select data word length */
92 switch (params_format(params)) {
93 case SNDRV_PCM_FORMAT_S8: wlen = AIC26_WLEN_16; break;
94 case SNDRV_PCM_FORMAT_S16_BE: wlen = AIC26_WLEN_16; break;
95 case SNDRV_PCM_FORMAT_S24_BE: wlen = AIC26_WLEN_24; break;
96 case SNDRV_PCM_FORMAT_S32_BE: wlen = AIC26_WLEN_32; break;
97 default:
98 dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL;
99 }
100
Michael Williamson2aba76f2011-05-20 10:26:06 -0400101 /**
102 * Configure PLL
103 * fsref = (mclk * PLLM) / 2048
104 * where PLLM = J.DDDD (DDDD register ranges from 0 to 9999, decimal)
105 */
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100106 pval = 1;
Michael Williamson2aba76f2011-05-20 10:26:06 -0400107 /* compute J portion of multiplier */
108 jval = fsref / (aic26->mclk / 2048);
109 /* compute fractional DDDD component of multiplier */
110 dval = fsref - (jval * (aic26->mclk / 2048));
111 dval = (10000 * dval) / (aic26->mclk / 2048);
112 dev_dbg(&aic26->spi->dev, "Setting PLLM to %d.%04d\n", jval, dval);
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100113 qval = 0;
114 reg = 0x8000 | qval << 11 | pval << 8 | jval << 2;
Mark Brown12201392013-08-16 12:13:50 +0100115 snd_soc_write(codec, AIC26_REG_PLL_PROG1, reg);
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100116 reg = dval << 2;
Mark Brown12201392013-08-16 12:13:50 +0100117 snd_soc_write(codec, AIC26_REG_PLL_PROG2, reg);
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100118
119 /* Audio Control 3 (master mode, fsref rate) */
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100120 if (aic26->master)
Mark Brown5b0959d2013-09-25 13:14:41 +0100121 reg = 0x0800;
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100122 if (fsref == 48000)
Mark Brown5b0959d2013-09-25 13:14:41 +0100123 reg = 0x2000;
124 snd_soc_update_bits(codec, AIC26_REG_AUDIO_CTRL3, 0xf800, reg);
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100125
126 /* Audio Control 1 (FSref divisor) */
Mark Brown5b0959d2013-09-25 13:14:41 +0100127 reg = wlen | aic26->datfm | (divisor << 3) | divisor;
128 snd_soc_update_bits(codec, AIC26_REG_AUDIO_CTRL1, 0xfff, reg);
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100129
130 return 0;
131}
132
133/**
134 * aic26_mute - Mute control to reduce noise when changing audio format
135 */
136static int aic26_mute(struct snd_soc_dai *dai, int mute)
137{
138 struct snd_soc_codec *codec = dai->codec;
Takashi Iwaid4a8ca22010-04-20 08:20:31 +0200139 struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
Mark Brown5b0959d2013-09-25 13:14:41 +0100140 u16 reg;
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100141
142 dev_dbg(&aic26->spi->dev, "aic26_mute(dai=%p, mute=%i)\n",
143 dai, mute);
144
145 if (mute)
Mark Brown5b0959d2013-09-25 13:14:41 +0100146 reg = 0x8080;
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100147 else
Mark Brown5b0959d2013-09-25 13:14:41 +0100148 reg = 0;
149 snd_soc_update_bits(codec, AIC26_REG_DAC_GAIN, 0x8000, reg);
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100150
151 return 0;
152}
153
154static int aic26_set_sysclk(struct snd_soc_dai *codec_dai,
155 int clk_id, unsigned int freq, int dir)
156{
157 struct snd_soc_codec *codec = codec_dai->codec;
Takashi Iwaid4a8ca22010-04-20 08:20:31 +0200158 struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100159
160 dev_dbg(&aic26->spi->dev, "aic26_set_sysclk(dai=%p, clk_id==%i,"
161 " freq=%i, dir=%i)\n",
162 codec_dai, clk_id, freq, dir);
163
164 /* MCLK needs to fall between 2MHz and 50 MHz */
165 if ((freq < 2000000) || (freq > 50000000))
166 return -EINVAL;
167
168 aic26->mclk = freq;
169 return 0;
170}
171
172static int aic26_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
173{
174 struct snd_soc_codec *codec = codec_dai->codec;
Takashi Iwaid4a8ca22010-04-20 08:20:31 +0200175 struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100176
177 dev_dbg(&aic26->spi->dev, "aic26_set_fmt(dai=%p, fmt==%i)\n",
178 codec_dai, fmt);
179
180 /* set master/slave audio interface */
181 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
182 case SND_SOC_DAIFMT_CBM_CFM: aic26->master = 1; break;
183 case SND_SOC_DAIFMT_CBS_CFS: aic26->master = 0; break;
184 default:
185 dev_dbg(&aic26->spi->dev, "bad master\n"); return -EINVAL;
186 }
187
188 /* interface format */
189 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
190 case SND_SOC_DAIFMT_I2S: aic26->datfm = AIC26_DATFM_I2S; break;
191 case SND_SOC_DAIFMT_DSP_A: aic26->datfm = AIC26_DATFM_DSP; break;
192 case SND_SOC_DAIFMT_RIGHT_J: aic26->datfm = AIC26_DATFM_RIGHTJ; break;
193 case SND_SOC_DAIFMT_LEFT_J: aic26->datfm = AIC26_DATFM_LEFTJ; break;
194 default:
195 dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL;
196 }
197
198 return 0;
199}
200
201/* ---------------------------------------------------------------------
202 * Digital Audio Interface Definition
203 */
204#define AIC26_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
205 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
206 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
207 SNDRV_PCM_RATE_48000)
208#define AIC26_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE |\
209 SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE)
210
Lars-Peter Clausen85e76522011-11-23 11:40:40 +0100211static const struct snd_soc_dai_ops aic26_dai_ops = {
Eric Miao6335d052009-03-03 09:41:00 +0800212 .hw_params = aic26_hw_params,
213 .digital_mute = aic26_mute,
214 .set_sysclk = aic26_set_sysclk,
215 .set_fmt = aic26_set_fmt,
216};
217
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000218static struct snd_soc_dai_driver aic26_dai = {
219 .name = "tlv320aic26-hifi",
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100220 .playback = {
221 .stream_name = "Playback",
222 .channels_min = 2,
223 .channels_max = 2,
224 .rates = AIC26_RATES,
225 .formats = AIC26_FORMATS,
226 },
227 .capture = {
228 .stream_name = "Capture",
229 .channels_min = 2,
230 .channels_max = 2,
231 .rates = AIC26_RATES,
232 .formats = AIC26_FORMATS,
233 },
Eric Miao6335d052009-03-03 09:41:00 +0800234 .ops = &aic26_dai_ops,
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100235};
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100236
237/* ---------------------------------------------------------------------
238 * ALSA controls
239 */
240static const char *aic26_capture_src_text[] = {"Mic", "Aux"};
241static const struct soc_enum aic26_capture_src_enum =
242 SOC_ENUM_SINGLE(AIC26_REG_AUDIO_CTRL1, 12, 2, aic26_capture_src_text);
243
244static const struct snd_kcontrol_new aic26_snd_controls[] = {
245 /* Output */
246 SOC_DOUBLE("PCM Playback Volume", AIC26_REG_DAC_GAIN, 8, 0, 0x7f, 1),
247 SOC_DOUBLE("PCM Playback Switch", AIC26_REG_DAC_GAIN, 15, 7, 1, 1),
248 SOC_SINGLE("PCM Capture Volume", AIC26_REG_ADC_GAIN, 8, 0x7f, 0),
249 SOC_SINGLE("PCM Capture Mute", AIC26_REG_ADC_GAIN, 15, 1, 1),
250 SOC_SINGLE("Keyclick activate", AIC26_REG_AUDIO_CTRL2, 15, 0x1, 0),
251 SOC_SINGLE("Keyclick amplitude", AIC26_REG_AUDIO_CTRL2, 12, 0x7, 0),
252 SOC_SINGLE("Keyclick frequency", AIC26_REG_AUDIO_CTRL2, 8, 0x7, 0),
253 SOC_SINGLE("Keyclick period", AIC26_REG_AUDIO_CTRL2, 4, 0xf, 0),
254 SOC_ENUM("Capture Source", aic26_capture_src_enum),
255};
256
257/* ---------------------------------------------------------------------
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100258 * SPI device portion of driver: sysfs files for debugging
259 */
260
261static ssize_t aic26_keyclick_show(struct device *dev,
262 struct device_attribute *attr, char *buf)
263{
264 struct aic26 *aic26 = dev_get_drvdata(dev);
265 int val, amp, freq, len;
266
Mark Brown5b0959d2013-09-25 13:14:41 +0100267 val = snd_soc_read(aic26->codec, AIC26_REG_AUDIO_CTRL2);
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100268 amp = (val >> 12) & 0x7;
269 freq = (125 << ((val >> 8) & 0x7)) >> 1;
270 len = 2 * (1 + ((val >> 4) & 0xf));
271
272 return sprintf(buf, "amp=%x freq=%iHz len=%iclks\n", amp, freq, len);
273}
274
275/* Any write to the keyclick attribute will trigger the keyclick event */
276static ssize_t aic26_keyclick_set(struct device *dev,
277 struct device_attribute *attr,
278 const char *buf, size_t count)
279{
280 struct aic26 *aic26 = dev_get_drvdata(dev);
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100281
Mark Brown5b0959d2013-09-25 13:14:41 +0100282 snd_soc_update_bits(aic26->codec, AIC26_REG_AUDIO_CTRL2,
283 0x8000, 0x800);
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100284
285 return count;
286}
287
Mark Brown9cce39a2008-07-29 11:42:33 +0100288static DEVICE_ATTR(keyclick, 0644, aic26_keyclick_show, aic26_keyclick_set);
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100289
290/* ---------------------------------------------------------------------
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000291 * SoC CODEC portion of driver: probe and release routines
292 */
293static int aic26_probe(struct snd_soc_codec *codec)
294{
Lars-Peter Clausenf8f11792013-08-06 13:39:29 +0200295 struct aic26 *aic26 = dev_get_drvdata(codec->dev);
Mark Brown5b0959d2013-09-25 13:14:41 +0100296 int ret, reg;
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000297
Mark Brown7fbdeb82013-09-25 13:29:44 +0100298 snd_soc_codec_set_cache_io(codec, 16, 16, SND_SOC_REGMAP);
299
Lars-Peter Clausenf8f11792013-08-06 13:39:29 +0200300 aic26->codec = codec;
301
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000302 /* Reset the codec to power on defaults */
Mark Brown12201392013-08-16 12:13:50 +0100303 snd_soc_write(codec, AIC26_REG_RESET, 0xBB00);
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000304
305 /* Power up CODEC */
Mark Brown12201392013-08-16 12:13:50 +0100306 snd_soc_write(codec, AIC26_REG_POWER_CTRL, 0);
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000307
308 /* Audio Control 3 (master mode, fsref rate) */
Mark Brown12201392013-08-16 12:13:50 +0100309 reg = snd_soc_read(codec, AIC26_REG_AUDIO_CTRL3);
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000310 reg &= ~0xf800;
311 reg |= 0x0800; /* set master mode */
Mark Brown12201392013-08-16 12:13:50 +0100312 snd_soc_write(codec, AIC26_REG_AUDIO_CTRL3, reg);
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000313
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000314 /* Register the sysfs files for debugging */
315 /* Create SysFS files */
316 ret = device_create_file(codec->dev, &dev_attr_keyclick);
317 if (ret)
318 dev_info(codec->dev, "error creating sysfs files\n");
319
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000320 return 0;
321}
322
323static struct snd_soc_codec_driver aic26_soc_codec_dev = {
324 .probe = aic26_probe,
Mark Brown806955d2013-09-25 13:10:33 +0100325 .controls = aic26_snd_controls,
326 .num_controls = ARRAY_SIZE(aic26_snd_controls),
Mark Brown4a11bc22013-08-16 12:24:47 +0100327 .dapm_widgets = tlv320aic26_dapm_widgets,
328 .num_dapm_widgets = ARRAY_SIZE(tlv320aic26_dapm_widgets),
329 .dapm_routes = tlv320aic26_dapm_routes,
330 .num_dapm_routes = ARRAY_SIZE(tlv320aic26_dapm_routes),
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000331};
332
Mark Brown7fbdeb82013-09-25 13:29:44 +0100333static const struct regmap_config aic26_regmap = {
334 .reg_bits = 16,
335 .val_bits = 16,
336};
337
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000338/* ---------------------------------------------------------------------
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100339 * SPI device portion of driver: probe and release routines and SPI
340 * driver registration.
341 */
342static int aic26_spi_probe(struct spi_device *spi)
343{
344 struct aic26 *aic26;
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000345 int ret;
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100346
347 dev_dbg(&spi->dev, "probing tlv320aic26 spi device\n");
348
349 /* Allocate driver data */
Axel Lina8163022011-12-29 12:08:36 +0800350 aic26 = devm_kzalloc(&spi->dev, sizeof *aic26, GFP_KERNEL);
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100351 if (!aic26)
352 return -ENOMEM;
353
Mark Brown7fbdeb82013-09-25 13:29:44 +0100354 aic26->regmap = devm_regmap_init_spi(spi, &aic26_regmap);
355 if (IS_ERR(aic26->regmap))
356 return PTR_ERR(aic26->regmap);
357
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100358 /* Initialize the driver data */
359 aic26->spi = spi;
360 dev_set_drvdata(&spi->dev, aic26);
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100361 aic26->master = 1;
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100362
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000363 ret = snd_soc_register_codec(&spi->dev,
364 &aic26_soc_codec_dev, &aic26_dai, 1);
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000365 return ret;
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100366}
367
368static int aic26_spi_remove(struct spi_device *spi)
369{
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000370 snd_soc_unregister_codec(&spi->dev);
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100371 return 0;
372}
373
374static struct spi_driver aic26_spi = {
375 .driver = {
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000376 .name = "tlv320aic26-codec",
Grant Likelyd8e3bb72008-07-29 11:42:31 +0100377 .owner = THIS_MODULE,
378 },
379 .probe = aic26_spi_probe,
380 .remove = aic26_spi_remove,
381};
382
Sachin Kamat9bb280a2012-08-27 17:00:26 +0530383module_spi_driver(aic26_spi);