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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 SOC_ENUM_SINGLE_DECL(ad1836_deemp_enum,
 44                             AD1836_DAC_CTRL1, 8, 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_width(params)) {
172         case 16:
173                 word_len = AD1836_WORD_LEN_16;
174                 break;
175         case 20:
176                 word_len = AD1836_WORD_LEN_20;
177                 break;
178         case 24:
179         case 32:
180                 word_len = AD1836_WORD_LEN_24;
181                 break;
182         default:
183                 return -EINVAL;
184         }
185 
186         regmap_update_bits(ad1836->regmap, AD1836_DAC_CTRL1,
187                 AD1836_DAC_WORD_LEN_MASK,
188                 word_len << AD1836_DAC_WORD_LEN_OFFSET);
189 
190         regmap_update_bits(ad1836->regmap, AD1836_ADC_CTRL2,
191                 AD1836_ADC_WORD_LEN_MASK,
192                 word_len << AD1836_ADC_WORD_OFFSET);
193 
194         return 0;
195 }
196 
197 static const struct snd_soc_dai_ops ad1836_dai_ops = {
198         .hw_params = ad1836_hw_params,
199         .set_fmt = ad1836_set_dai_fmt,
200 };
201 
202 #define AD183X_DAI(_name, num_dacs, num_adcs) \
203 { \
204         .name = _name "-hifi", \
205         .playback = { \
206                 .stream_name = "Playback", \
207                 .channels_min = 2, \
208                 .channels_max = (num_dacs) * 2, \
209                 .rates = SNDRV_PCM_RATE_48000,  \
210                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | \
211                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, \
212         }, \
213         .capture = { \
214                 .stream_name = "Capture", \
215                 .channels_min = 2, \
216                 .channels_max = (num_adcs) * 2, \
217                 .rates = SNDRV_PCM_RATE_48000, \
218                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | \
219                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, \
220         }, \
221         .ops = &ad1836_dai_ops, \
222 }
223 
224 static struct snd_soc_dai_driver ad183x_dais[] = {
225         [AD1835] = AD183X_DAI("ad1835", 4, 1),
226         [AD1836] = AD183X_DAI("ad1836", 3, 2),
227         [AD1838] = AD183X_DAI("ad1838", 3, 1),
228 };
229 
230 #ifdef CONFIG_PM
231 static int ad1836_suspend(struct snd_soc_codec *codec)
232 {
233         struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
234         /* reset clock control mode */
235         return regmap_update_bits(ad1836->regmap, AD1836_ADC_CTRL2,
236                 AD1836_ADC_SERFMT_MASK, 0);
237 }
238 
239 static int ad1836_resume(struct snd_soc_codec *codec)
240 {
241         struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
242         /* restore clock control mode */
243         return regmap_update_bits(ad1836->regmap, AD1836_ADC_CTRL2,
244                 AD1836_ADC_SERFMT_MASK, AD1836_ADC_AUX);
245 }
246 #else
247 #define ad1836_suspend NULL
248 #define ad1836_resume  NULL
249 #endif
250 
251 static int ad1836_probe(struct snd_soc_codec *codec)
252 {
253         struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
254         struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec);
255         int num_dacs, num_adcs;
256         int ret = 0;
257         int i;
258 
259         num_dacs = ad183x_dais[ad1836->type].playback.channels_max / 2;
260         num_adcs = ad183x_dais[ad1836->type].capture.channels_max / 2;
261 
262         /* default setting for ad1836 */
263         /* de-emphasis: 48kHz, power-on dac */
264         regmap_write(ad1836->regmap, AD1836_DAC_CTRL1, 0x300);
265         /* unmute dac channels */
266         regmap_write(ad1836->regmap, AD1836_DAC_CTRL2, 0x0);
267         /* high-pass filter enable, power-on adc */
268         regmap_write(ad1836->regmap, AD1836_ADC_CTRL1, 0x100);
269         /* unmute adc channles, adc aux mode */
270         regmap_write(ad1836->regmap, AD1836_ADC_CTRL2, 0x180);
271         /* volume */
272         for (i = 1; i <= num_dacs; ++i) {
273                 regmap_write(ad1836->regmap, AD1836_DAC_L_VOL(i), 0x3FF);
274                 regmap_write(ad1836->regmap, AD1836_DAC_R_VOL(i), 0x3FF);
275         }
276 
277         if (ad1836->type == AD1836) {
278                 /* left/right diff:PGA/MUX */
279                 regmap_write(ad1836->regmap, AD1836_ADC_CTRL3, 0x3A);
280                 ret = snd_soc_add_codec_controls(codec, ad1836_controls,
281                                 ARRAY_SIZE(ad1836_controls));
282                 if (ret)
283                         return ret;
284         } else {
285                 regmap_write(ad1836->regmap, AD1836_ADC_CTRL3, 0x00);
286         }
287 
288         ret = snd_soc_add_codec_controls(codec, ad183x_dac_controls, num_dacs * 2);
289         if (ret)
290                 return ret;
291 
292         ret = snd_soc_add_codec_controls(codec, ad183x_adc_controls, num_adcs);
293         if (ret)
294                 return ret;
295 
296         ret = snd_soc_dapm_new_controls(dapm, ad183x_dac_dapm_widgets, num_dacs);
297         if (ret)
298                 return ret;
299 
300         ret = snd_soc_dapm_new_controls(dapm, ad183x_adc_dapm_widgets, num_adcs);
301         if (ret)
302                 return ret;
303 
304         ret = snd_soc_dapm_add_routes(dapm, ad183x_dac_routes, num_dacs);
305         if (ret)
306                 return ret;
307 
308         ret = snd_soc_dapm_add_routes(dapm, ad183x_adc_routes, num_adcs);
309         if (ret)
310                 return ret;
311 
312         return ret;
313 }
314 
315 /* power down chip */
316 static int ad1836_remove(struct snd_soc_codec *codec)
317 {
318         struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
319         /* reset clock control mode */
320         return regmap_update_bits(ad1836->regmap, AD1836_ADC_CTRL2,
321                 AD1836_ADC_SERFMT_MASK, 0);
322 }
323 
324 static const struct snd_soc_codec_driver soc_codec_dev_ad1836 = {
325         .probe = ad1836_probe,
326         .remove = ad1836_remove,
327         .suspend = ad1836_suspend,
328         .resume = ad1836_resume,
329 
330         .component_driver = {
331                 .controls               = ad183x_controls,
332                 .num_controls           = ARRAY_SIZE(ad183x_controls),
333                 .dapm_widgets           = ad183x_dapm_widgets,
334                 .num_dapm_widgets       = ARRAY_SIZE(ad183x_dapm_widgets),
335                 .dapm_routes            = ad183x_dapm_routes,
336                 .num_dapm_routes        = ARRAY_SIZE(ad183x_dapm_routes),
337         },
338 };
339 
340 static const struct reg_default ad1836_reg_defaults[] = {
341         { AD1836_DAC_CTRL1, 0x0000 },
342         { AD1836_DAC_CTRL2, 0x0000 },
343         { AD1836_DAC_L_VOL(0), 0x0000 },
344         { AD1836_DAC_R_VOL(0), 0x0000 },
345         { AD1836_DAC_L_VOL(1), 0x0000 },
346         { AD1836_DAC_R_VOL(1), 0x0000 },
347         { AD1836_DAC_L_VOL(2), 0x0000 },
348         { AD1836_DAC_R_VOL(2), 0x0000 },
349         { AD1836_DAC_L_VOL(3), 0x0000 },
350         { AD1836_DAC_R_VOL(3), 0x0000 },
351         { AD1836_ADC_CTRL1, 0x0000 },
352         { AD1836_ADC_CTRL2, 0x0000 },
353         { AD1836_ADC_CTRL3, 0x0000 },
354 };
355 
356 static const struct regmap_config ad1836_regmap_config = {
357         .val_bits = 12,
358         .reg_bits = 4,
359         .read_flag_mask = 0x08,
360 
361         .max_register = AD1836_ADC_CTRL3,
362         .reg_defaults = ad1836_reg_defaults,
363         .num_reg_defaults = ARRAY_SIZE(ad1836_reg_defaults),
364         .cache_type = REGCACHE_RBTREE,
365 };
366 
367 static int ad1836_spi_probe(struct spi_device *spi)
368 {
369         struct ad1836_priv *ad1836;
370         int ret;
371 
372         ad1836 = devm_kzalloc(&spi->dev, sizeof(struct ad1836_priv),
373                               GFP_KERNEL);
374         if (ad1836 == NULL)
375                 return -ENOMEM;
376 
377         ad1836->regmap = devm_regmap_init_spi(spi, &ad1836_regmap_config);
378         if (IS_ERR(ad1836->regmap))
379                 return PTR_ERR(ad1836->regmap);
380 
381         ad1836->type = spi_get_device_id(spi)->driver_data;
382 
383         spi_set_drvdata(spi, ad1836);
384 
385         ret = snd_soc_register_codec(&spi->dev,
386                         &soc_codec_dev_ad1836, &ad183x_dais[ad1836->type], 1);
387         return ret;
388 }
389 
390 static int ad1836_spi_remove(struct spi_device *spi)
391 {
392         snd_soc_unregister_codec(&spi->dev);
393         return 0;
394 }
395 
396 static const struct spi_device_id ad1836_ids[] = {
397         { "ad1835", AD1835 },
398         { "ad1836", AD1836 },
399         { "ad1837", AD1835 },
400         { "ad1838", AD1838 },
401         { "ad1839", AD1838 },
402         { },
403 };
404 MODULE_DEVICE_TABLE(spi, ad1836_ids);
405 
406 static struct spi_driver ad1836_spi_driver = {
407         .driver = {
408                 .name   = "ad1836",
409         },
410         .probe          = ad1836_spi_probe,
411         .remove         = ad1836_spi_remove,
412         .id_table       = ad1836_ids,
413 };
414 
415 module_spi_driver(ad1836_spi_driver);
416 
417 MODULE_DESCRIPTION("ASoC ad1836 driver");
418 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
419 MODULE_LICENSE("GPL");
420 

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