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Linux/sound/soc/codecs/ad1836.c

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  1  /*
  2  * Audio Codec driver supporting:
  3  *  AD1835A, AD1836, AD1837A, AD1838A, AD1839A
  4  *
  5  * Copyright 2009-2011 Analog Devices Inc.
  6  *
  7  * Licensed under the GPL-2 or later.
  8  */
  9 
 10 #include <linux/init.h>
 11 #include <linux/slab.h>
 12 #include <linux/module.h>
 13 #include <linux/kernel.h>
 14 #include <linux/device.h>
 15 #include <sound/core.h>
 16 #include <sound/pcm.h>
 17 #include <sound/pcm_params.h>
 18 #include <sound/initval.h>
 19 #include <sound/soc.h>
 20 #include <sound/tlv.h>
 21 #include <linux/spi/spi.h>
 22 #include <linux/regmap.h>
 23 
 24 #include "ad1836.h"
 25 
 26 enum ad1836_type {
 27         AD1835,
 28         AD1836,
 29         AD1838,
 30 };
 31 
 32 /* codec private data */
 33 struct ad1836_priv {
 34         enum ad1836_type type;
 35         struct regmap *regmap;
 36 };
 37 
 38 /*
 39  * AD1836 volume/mute/de-emphasis etc. controls
 40  */
 41 static const char *ad1836_deemp[] = {"None", "44.1kHz", "32kHz", "48kHz"};
 42 
 43 static const struct soc_enum ad1836_deemp_enum =
 44         SOC_ENUM_SINGLE(AD1836_DAC_CTRL1, 8, 4, ad1836_deemp);
 45 
 46 #define AD1836_DAC_VOLUME(x) \
 47         SOC_DOUBLE_R("DAC" #x " Playback Volume", AD1836_DAC_L_VOL(x), \
 48                         AD1836_DAC_R_VOL(x), 0, 0x3FF, 0)
 49 
 50 #define AD1836_DAC_SWITCH(x) \
 51         SOC_DOUBLE("DAC" #x " Playback Switch", AD1836_DAC_CTRL2, \
 52                         AD1836_MUTE_LEFT(x), AD1836_MUTE_RIGHT(x), 1, 1)
 53 
 54 #define AD1836_ADC_SWITCH(x) \
 55         SOC_DOUBLE("ADC" #x " Capture Switch", AD1836_ADC_CTRL2, \
 56                 AD1836_MUTE_LEFT(x), AD1836_MUTE_RIGHT(x), 1, 1)
 57 
 58 static const struct snd_kcontrol_new ad183x_dac_controls[] = {
 59         AD1836_DAC_VOLUME(1),
 60         AD1836_DAC_SWITCH(1),
 61         AD1836_DAC_VOLUME(2),
 62         AD1836_DAC_SWITCH(2),
 63         AD1836_DAC_VOLUME(3),
 64         AD1836_DAC_SWITCH(3),
 65         AD1836_DAC_VOLUME(4),
 66         AD1836_DAC_SWITCH(4),
 67 };
 68 
 69 static const struct snd_soc_dapm_widget ad183x_dac_dapm_widgets[] = {
 70         SND_SOC_DAPM_OUTPUT("DAC1OUT"),
 71         SND_SOC_DAPM_OUTPUT("DAC2OUT"),
 72         SND_SOC_DAPM_OUTPUT("DAC3OUT"),
 73         SND_SOC_DAPM_OUTPUT("DAC4OUT"),
 74 };
 75 
 76 static const struct snd_soc_dapm_route ad183x_dac_routes[] = {
 77         { "DAC1OUT", NULL, "DAC" },
 78         { "DAC2OUT", NULL, "DAC" },
 79         { "DAC3OUT", NULL, "DAC" },
 80         { "DAC4OUT", NULL, "DAC" },
 81 };
 82 
 83 static const struct snd_kcontrol_new ad183x_adc_controls[] = {
 84         AD1836_ADC_SWITCH(1),
 85         AD1836_ADC_SWITCH(2),
 86         AD1836_ADC_SWITCH(3),
 87 };
 88 
 89 static const struct snd_soc_dapm_widget ad183x_adc_dapm_widgets[] = {
 90         SND_SOC_DAPM_INPUT("ADC1IN"),
 91         SND_SOC_DAPM_INPUT("ADC2IN"),
 92 };
 93 
 94 static const struct snd_soc_dapm_route ad183x_adc_routes[] = {
 95         { "ADC", NULL, "ADC1IN" },
 96         { "ADC", NULL, "ADC2IN" },
 97 };
 98 
 99 static const struct snd_kcontrol_new ad183x_controls[] = {
100         /* ADC high-pass filter */
101         SOC_SINGLE("ADC High Pass Filter Switch", AD1836_ADC_CTRL1,
102                         AD1836_ADC_HIGHPASS_FILTER, 1, 0),
103 
104         /* DAC de-emphasis */
105         SOC_ENUM("Playback Deemphasis", ad1836_deemp_enum),
106 };
107 
108 static const struct snd_soc_dapm_widget ad183x_dapm_widgets[] = {
109         SND_SOC_DAPM_DAC("DAC", "Playback", AD1836_DAC_CTRL1,
110                                 AD1836_DAC_POWERDOWN, 1),
111         SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
112         SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1836_ADC_CTRL1,
113                                 AD1836_ADC_POWERDOWN, 1, NULL, 0),
114 };
115 
116 static const struct snd_soc_dapm_route ad183x_dapm_routes[] = {
117         { "DAC", NULL, "ADC_PWR" },
118         { "ADC", NULL, "ADC_PWR" },
119 };
120 
121 static const DECLARE_TLV_DB_SCALE(ad1836_in_tlv, 0, 300, 0);
122 
123 static const struct snd_kcontrol_new ad1836_controls[] = {
124         SOC_DOUBLE_TLV("ADC2 Capture Volume", AD1836_ADC_CTRL1, 3, 0, 4, 0,
125             ad1836_in_tlv),
126 };
127 
128 /*
129  * DAI ops entries
130  */
131 
132 static int ad1836_set_dai_fmt(struct snd_soc_dai *codec_dai,
133                 unsigned int fmt)
134 {
135         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
136         /* at present, we support adc aux mode to interface with
137          * blackfin sport tdm mode
138          */
139         case SND_SOC_DAIFMT_DSP_A:
140                 break;
141         default:
142                 return -EINVAL;
143         }
144 
145         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
146         case SND_SOC_DAIFMT_IB_IF:
147                 break;
148         default:
149                 return -EINVAL;
150         }
151 
152         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
153         /* ALCLK,ABCLK are both output, AD1836 can only be master */
154         case SND_SOC_DAIFMT_CBM_CFM:
155                 break;
156         default:
157                 return -EINVAL;
158         }
159 
160         return 0;
161 }
162 
163 static int ad1836_hw_params(struct snd_pcm_substream *substream,
164                 struct snd_pcm_hw_params *params,
165                 struct snd_soc_dai *dai)
166 {
167         struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(dai->codec);
168         int word_len = 0;
169 
170         /* bit size */
171         switch (params_format(params)) {
172         case SNDRV_PCM_FORMAT_S16_LE:
173                 word_len = AD1836_WORD_LEN_16;
174                 break;
175         case SNDRV_PCM_FORMAT_S20_3LE:
176                 word_len = AD1836_WORD_LEN_20;
177                 break;
178         case SNDRV_PCM_FORMAT_S24_LE:
179         case SNDRV_PCM_FORMAT_S32_LE:
180                 word_len = AD1836_WORD_LEN_24;
181                 break;
182         }
183 
184         regmap_update_bits(ad1836->regmap, AD1836_DAC_CTRL1,
185                 AD1836_DAC_WORD_LEN_MASK,
186                 word_len << AD1836_DAC_WORD_LEN_OFFSET);
187 
188         regmap_update_bits(ad1836->regmap, AD1836_ADC_CTRL2,
189                 AD1836_ADC_WORD_LEN_MASK,
190                 word_len << AD1836_ADC_WORD_OFFSET);
191 
192         return 0;
193 }
194 
195 static const struct snd_soc_dai_ops ad1836_dai_ops = {
196         .hw_params = ad1836_hw_params,
197         .set_fmt = ad1836_set_dai_fmt,
198 };
199 
200 #define AD183X_DAI(_name, num_dacs, num_adcs) \
201 { \
202         .name = _name "-hifi", \
203         .playback = { \
204                 .stream_name = "Playback", \
205                 .channels_min = 2, \
206                 .channels_max = (num_dacs) * 2, \
207                 .rates = SNDRV_PCM_RATE_48000,  \
208                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | \
209                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, \
210         }, \
211         .capture = { \
212                 .stream_name = "Capture", \
213                 .channels_min = 2, \
214                 .channels_max = (num_adcs) * 2, \
215                 .rates = SNDRV_PCM_RATE_48000, \
216                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | \
217                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, \
218         }, \
219         .ops = &ad1836_dai_ops, \
220 }
221 
222 static struct snd_soc_dai_driver ad183x_dais[] = {
223         [AD1835] = AD183X_DAI("ad1835", 4, 1),
224         [AD1836] = AD183X_DAI("ad1836", 3, 2),
225         [AD1838] = AD183X_DAI("ad1838", 3, 1),
226 };
227 
228 #ifdef CONFIG_PM
229 static int ad1836_suspend(struct snd_soc_codec *codec)
230 {
231         struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
232         /* reset clock control mode */
233         return regmap_update_bits(ad1836->regmap, AD1836_ADC_CTRL2,
234                 AD1836_ADC_SERFMT_MASK, 0);
235 }
236 
237 static int ad1836_resume(struct snd_soc_codec *codec)
238 {
239         struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
240         /* restore clock control mode */
241         return regmap_update_bits(ad1836->regmap, AD1836_ADC_CTRL2,
242                 AD1836_ADC_SERFMT_MASK, AD1836_ADC_AUX);
243 }
244 #else
245 #define ad1836_suspend NULL
246 #define ad1836_resume  NULL
247 #endif
248 
249 static int ad1836_probe(struct snd_soc_codec *codec)
250 {
251         struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
252         struct snd_soc_dapm_context *dapm = &codec->dapm;
253         int num_dacs, num_adcs;
254         int ret = 0;
255         int i;
256 
257         num_dacs = ad183x_dais[ad1836->type].playback.channels_max / 2;
258         num_adcs = ad183x_dais[ad1836->type].capture.channels_max / 2;
259 
260         /* default setting for ad1836 */
261         /* de-emphasis: 48kHz, power-on dac */
262         regmap_write(ad1836->regmap, AD1836_DAC_CTRL1, 0x300);
263         /* unmute dac channels */
264         regmap_write(ad1836->regmap, AD1836_DAC_CTRL2, 0x0);
265         /* high-pass filter enable, power-on adc */
266         regmap_write(ad1836->regmap, AD1836_ADC_CTRL1, 0x100);
267         /* unmute adc channles, adc aux mode */
268         regmap_write(ad1836->regmap, AD1836_ADC_CTRL2, 0x180);
269         /* volume */
270         for (i = 1; i <= num_dacs; ++i) {
271                 regmap_write(ad1836->regmap, AD1836_DAC_L_VOL(i), 0x3FF);
272                 regmap_write(ad1836->regmap, AD1836_DAC_R_VOL(i), 0x3FF);
273         }
274 
275         if (ad1836->type == AD1836) {
276                 /* left/right diff:PGA/MUX */
277                 regmap_write(ad1836->regmap, AD1836_ADC_CTRL3, 0x3A);
278                 ret = snd_soc_add_codec_controls(codec, ad1836_controls,
279                                 ARRAY_SIZE(ad1836_controls));
280                 if (ret)
281                         return ret;
282         } else {
283                 regmap_write(ad1836->regmap, AD1836_ADC_CTRL3, 0x00);
284         }
285 
286         ret = snd_soc_add_codec_controls(codec, ad183x_dac_controls, num_dacs * 2);
287         if (ret)
288                 return ret;
289 
290         ret = snd_soc_add_codec_controls(codec, ad183x_adc_controls, num_adcs);
291         if (ret)
292                 return ret;
293 
294         ret = snd_soc_dapm_new_controls(dapm, ad183x_dac_dapm_widgets, num_dacs);
295         if (ret)
296                 return ret;
297 
298         ret = snd_soc_dapm_new_controls(dapm, ad183x_adc_dapm_widgets, num_adcs);
299         if (ret)
300                 return ret;
301 
302         ret = snd_soc_dapm_add_routes(dapm, ad183x_dac_routes, num_dacs);
303         if (ret)
304                 return ret;
305 
306         ret = snd_soc_dapm_add_routes(dapm, ad183x_adc_routes, num_adcs);
307         if (ret)
308                 return ret;
309 
310         return ret;
311 }
312 
313 /* power down chip */
314 static int ad1836_remove(struct snd_soc_codec *codec)
315 {
316         struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
317         /* reset clock control mode */
318         return regmap_update_bits(ad1836->regmap, AD1836_ADC_CTRL2,
319                 AD1836_ADC_SERFMT_MASK, 0);
320 }
321 
322 static struct snd_soc_codec_driver soc_codec_dev_ad1836 = {
323         .probe = ad1836_probe,
324         .remove = ad1836_remove,
325         .suspend = ad1836_suspend,
326         .resume = ad1836_resume,
327 
328         .controls = ad183x_controls,
329         .num_controls = ARRAY_SIZE(ad183x_controls),
330         .dapm_widgets = ad183x_dapm_widgets,
331         .num_dapm_widgets = ARRAY_SIZE(ad183x_dapm_widgets),
332         .dapm_routes = ad183x_dapm_routes,
333         .num_dapm_routes = ARRAY_SIZE(ad183x_dapm_routes),
334 };
335 
336 static const struct reg_default ad1836_reg_defaults[] = {
337         { AD1836_DAC_CTRL1, 0x0000 },
338         { AD1836_DAC_CTRL2, 0x0000 },
339         { AD1836_DAC_L_VOL(0), 0x0000 },
340         { AD1836_DAC_R_VOL(0), 0x0000 },
341         { AD1836_DAC_L_VOL(1), 0x0000 },
342         { AD1836_DAC_R_VOL(1), 0x0000 },
343         { AD1836_DAC_L_VOL(2), 0x0000 },
344         { AD1836_DAC_R_VOL(2), 0x0000 },
345         { AD1836_DAC_L_VOL(3), 0x0000 },
346         { AD1836_DAC_R_VOL(3), 0x0000 },
347         { AD1836_ADC_CTRL1, 0x0000 },
348         { AD1836_ADC_CTRL2, 0x0000 },
349         { AD1836_ADC_CTRL3, 0x0000 },
350 };
351 
352 static const struct regmap_config ad1836_regmap_config = {
353         .val_bits = 12,
354         .reg_bits = 4,
355         .read_flag_mask = 0x08,
356 
357         .max_register = AD1836_ADC_CTRL3,
358         .reg_defaults = ad1836_reg_defaults,
359         .num_reg_defaults = ARRAY_SIZE(ad1836_reg_defaults),
360         .cache_type = REGCACHE_RBTREE,
361 };
362 
363 static int ad1836_spi_probe(struct spi_device *spi)
364 {
365         struct ad1836_priv *ad1836;
366         int ret;
367 
368         ad1836 = devm_kzalloc(&spi->dev, sizeof(struct ad1836_priv),
369                               GFP_KERNEL);
370         if (ad1836 == NULL)
371                 return -ENOMEM;
372 
373         ad1836->regmap = devm_regmap_init_spi(spi, &ad1836_regmap_config);
374         if (IS_ERR(ad1836->regmap))
375                 return PTR_ERR(ad1836->regmap);
376 
377         ad1836->type = spi_get_device_id(spi)->driver_data;
378 
379         spi_set_drvdata(spi, ad1836);
380 
381         ret = snd_soc_register_codec(&spi->dev,
382                         &soc_codec_dev_ad1836, &ad183x_dais[ad1836->type], 1);
383         return ret;
384 }
385 
386 static int ad1836_spi_remove(struct spi_device *spi)
387 {
388         snd_soc_unregister_codec(&spi->dev);
389         return 0;
390 }
391 
392 static const struct spi_device_id ad1836_ids[] = {
393         { "ad1835", AD1835 },
394         { "ad1836", AD1836 },
395         { "ad1837", AD1835 },
396         { "ad1838", AD1838 },
397         { "ad1839", AD1838 },
398         { },
399 };
400 MODULE_DEVICE_TABLE(spi, ad1836_ids);
401 
402 static struct spi_driver ad1836_spi_driver = {
403         .driver = {
404                 .name   = "ad1836",
405                 .owner  = THIS_MODULE,
406         },
407         .probe          = ad1836_spi_probe,
408         .remove         = ad1836_spi_remove,
409         .id_table       = ad1836_ids,
410 };
411 
412 module_spi_driver(ad1836_spi_driver);
413 
414 MODULE_DESCRIPTION("ASoC ad1836 driver");
415 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
416 MODULE_LICENSE("GPL");
417 

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