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Linux/sound/soc/codecs/stac9766.c

  1 /*
  2  * stac9766.c  --  ALSA SoC STAC9766 codec support
  3  *
  4  * Copyright 2009 Jon Smirl, Digispeaker
  5  * Author: Jon Smirl <jonsmirl@gmail.com>
  6  *
  7  *  This program is free software; you can redistribute  it and/or modify it
  8  *  under  the terms of  the GNU General  Public License as published by the
  9  *  Free Software Foundation;  either version 2 of the  License, or (at your
 10  *  option) any later version.
 11  *
 12  *  Features:-
 13  *
 14  *   o Support for AC97 Codec, S/PDIF
 15  */
 16 
 17 #include <linux/init.h>
 18 #include <linux/slab.h>
 19 #include <linux/module.h>
 20 #include <linux/device.h>
 21 #include <sound/core.h>
 22 #include <sound/pcm.h>
 23 #include <sound/ac97_codec.h>
 24 #include <sound/initval.h>
 25 #include <sound/pcm_params.h>
 26 #include <sound/soc.h>
 27 #include <sound/tlv.h>
 28 
 29 #include "stac9766.h"
 30 
 31 /*
 32  * STAC9766 register cache
 33  */
 34 static const u16 stac9766_reg[] = {
 35         0x6A90, 0x8000, 0x8000, 0x8000, /* 6 */
 36         0x0000, 0x0000, 0x8008, 0x8008, /* e */
 37         0x8808, 0x8808, 0x8808, 0x8808, /* 16 */
 38         0x8808, 0x0000, 0x8000, 0x0000, /* 1e */
 39         0x0000, 0x0000, 0x0000, 0x000f, /* 26 */
 40         0x0a05, 0x0400, 0xbb80, 0x0000, /* 2e */
 41         0x0000, 0xbb80, 0x0000, 0x0000, /* 36 */
 42         0x0000, 0x2000, 0x0000, 0x0100, /* 3e */
 43         0x0000, 0x0000, 0x0080, 0x0000, /* 46 */
 44         0x0000, 0x0000, 0x0003, 0xffff, /* 4e */
 45         0x0000, 0x0000, 0x0000, 0x0000, /* 56 */
 46         0x4000, 0x0000, 0x0000, 0x0000, /* 5e */
 47         0x1201, 0xFFFF, 0xFFFF, 0x0000, /* 66 */
 48         0x0000, 0x0000, 0x0000, 0x0000, /* 6e */
 49         0x0000, 0x0000, 0x0000, 0x0006, /* 76 */
 50         0x0000, 0x0000, 0x0000, 0x0000, /* 7e */
 51 };
 52 
 53 static const char *stac9766_record_mux[] = {"Mic", "CD", "Video", "AUX",
 54                         "Line", "Stereo Mix", "Mono Mix", "Phone"};
 55 static const char *stac9766_mono_mux[] = {"Mix", "Mic"};
 56 static const char *stac9766_mic_mux[] = {"Mic1", "Mic2"};
 57 static const char *stac9766_SPDIF_mux[] = {"PCM", "ADC Record"};
 58 static const char *stac9766_popbypass_mux[] = {"Normal", "Bypass Mixer"};
 59 static const char *stac9766_record_all_mux[] = {"All analog",
 60         "Analog plus DAC"};
 61 static const char *stac9766_boost1[] = {"0dB", "10dB"};
 62 static const char *stac9766_boost2[] = {"0dB", "20dB"};
 63 static const char *stac9766_stereo_mic[] = {"Off", "On"};
 64 
 65 static SOC_ENUM_DOUBLE_DECL(stac9766_record_enum,
 66                             AC97_REC_SEL, 8, 0, stac9766_record_mux);
 67 static SOC_ENUM_SINGLE_DECL(stac9766_mono_enum,
 68                             AC97_GENERAL_PURPOSE, 9, stac9766_mono_mux);
 69 static SOC_ENUM_SINGLE_DECL(stac9766_mic_enum,
 70                             AC97_GENERAL_PURPOSE, 8, stac9766_mic_mux);
 71 static SOC_ENUM_SINGLE_DECL(stac9766_SPDIF_enum,
 72                             AC97_STAC_DA_CONTROL, 1, stac9766_SPDIF_mux);
 73 static SOC_ENUM_SINGLE_DECL(stac9766_popbypass_enum,
 74                             AC97_GENERAL_PURPOSE, 15, stac9766_popbypass_mux);
 75 static SOC_ENUM_SINGLE_DECL(stac9766_record_all_enum,
 76                             AC97_STAC_ANALOG_SPECIAL, 12,
 77                             stac9766_record_all_mux);
 78 static SOC_ENUM_SINGLE_DECL(stac9766_boost1_enum,
 79                             AC97_MIC, 6, stac9766_boost1); /* 0/10dB */
 80 static SOC_ENUM_SINGLE_DECL(stac9766_boost2_enum,
 81                             AC97_STAC_ANALOG_SPECIAL, 2, stac9766_boost2); /* 0/20dB */
 82 static SOC_ENUM_SINGLE_DECL(stac9766_stereo_mic_enum,
 83                             AC97_STAC_STEREO_MIC, 2, stac9766_stereo_mic);
 84 
 85 static const DECLARE_TLV_DB_LINEAR(master_tlv, -4600, 0);
 86 static const DECLARE_TLV_DB_LINEAR(record_tlv, 0, 2250);
 87 static const DECLARE_TLV_DB_LINEAR(beep_tlv, -4500, 0);
 88 static const DECLARE_TLV_DB_LINEAR(mix_tlv, -3450, 1200);
 89 
 90 static const struct snd_kcontrol_new stac9766_snd_ac97_controls[] = {
 91         SOC_DOUBLE_TLV("Speaker Volume", AC97_MASTER, 8, 0, 31, 1, master_tlv),
 92         SOC_SINGLE("Speaker Switch", AC97_MASTER, 15, 1, 1),
 93         SOC_DOUBLE_TLV("Headphone Volume", AC97_HEADPHONE, 8, 0, 31, 1,
 94                        master_tlv),
 95         SOC_SINGLE("Headphone Switch", AC97_HEADPHONE, 15, 1, 1),
 96         SOC_SINGLE_TLV("Mono Out Volume", AC97_MASTER_MONO, 0, 31, 1,
 97                        master_tlv),
 98         SOC_SINGLE("Mono Out Switch", AC97_MASTER_MONO, 15, 1, 1),
 99 
100         SOC_DOUBLE_TLV("Record Volume", AC97_REC_GAIN, 8, 0, 15, 0, record_tlv),
101         SOC_SINGLE("Record Switch", AC97_REC_GAIN, 15, 1, 1),
102 
103 
104         SOC_SINGLE_TLV("Beep Volume", AC97_PC_BEEP, 1, 15, 1, beep_tlv),
105         SOC_SINGLE("Beep Switch", AC97_PC_BEEP, 15, 1, 1),
106         SOC_SINGLE("Beep Frequency", AC97_PC_BEEP, 5, 127, 1),
107         SOC_SINGLE_TLV("Phone Volume", AC97_PHONE, 0, 31, 1, mix_tlv),
108         SOC_SINGLE("Phone Switch", AC97_PHONE, 15, 1, 1),
109 
110         SOC_ENUM("Mic Boost1", stac9766_boost1_enum),
111         SOC_ENUM("Mic Boost2", stac9766_boost2_enum),
112         SOC_SINGLE_TLV("Mic Volume", AC97_MIC, 0, 31, 1, mix_tlv),
113         SOC_SINGLE("Mic Switch", AC97_MIC, 15, 1, 1),
114         SOC_ENUM("Stereo Mic", stac9766_stereo_mic_enum),
115 
116         SOC_DOUBLE_TLV("Line Volume", AC97_LINE, 8, 0, 31, 1, mix_tlv),
117         SOC_SINGLE("Line Switch", AC97_LINE, 15, 1, 1),
118         SOC_DOUBLE_TLV("CD Volume", AC97_CD, 8, 0, 31, 1, mix_tlv),
119         SOC_SINGLE("CD Switch", AC97_CD, 15, 1, 1),
120         SOC_DOUBLE_TLV("AUX Volume", AC97_AUX, 8, 0, 31, 1, mix_tlv),
121         SOC_SINGLE("AUX Switch", AC97_AUX, 15, 1, 1),
122         SOC_DOUBLE_TLV("Video Volume", AC97_VIDEO, 8, 0, 31, 1, mix_tlv),
123         SOC_SINGLE("Video Switch", AC97_VIDEO, 15, 1, 1),
124 
125         SOC_DOUBLE_TLV("DAC Volume", AC97_PCM, 8, 0, 31, 1, mix_tlv),
126         SOC_SINGLE("DAC Switch", AC97_PCM, 15, 1, 1),
127         SOC_SINGLE("Loopback Test Switch", AC97_GENERAL_PURPOSE, 7, 1, 0),
128         SOC_SINGLE("3D Volume", AC97_3D_CONTROL, 3, 2, 1),
129         SOC_SINGLE("3D Switch", AC97_GENERAL_PURPOSE, 13, 1, 0),
130 
131         SOC_ENUM("SPDIF Mux", stac9766_SPDIF_enum),
132         SOC_ENUM("Mic1/2 Mux", stac9766_mic_enum),
133         SOC_ENUM("Record All Mux", stac9766_record_all_enum),
134         SOC_ENUM("Record Mux", stac9766_record_enum),
135         SOC_ENUM("Mono Mux", stac9766_mono_enum),
136         SOC_ENUM("Pop Bypass Mux", stac9766_popbypass_enum),
137 };
138 
139 static int stac9766_ac97_write(struct snd_soc_codec *codec, unsigned int reg,
140                                unsigned int val)
141 {
142         struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
143         u16 *cache = codec->reg_cache;
144 
145         if (reg > AC97_STAC_PAGE0) {
146                 stac9766_ac97_write(codec, AC97_INT_PAGING, 0);
147                 soc_ac97_ops->write(ac97, reg, val);
148                 stac9766_ac97_write(codec, AC97_INT_PAGING, 1);
149                 return 0;
150         }
151         if (reg / 2 >= ARRAY_SIZE(stac9766_reg))
152                 return -EIO;
153 
154         soc_ac97_ops->write(ac97, reg, val);
155         cache[reg / 2] = val;
156         return 0;
157 }
158 
159 static unsigned int stac9766_ac97_read(struct snd_soc_codec *codec,
160                                        unsigned int reg)
161 {
162         struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
163         u16 val = 0, *cache = codec->reg_cache;
164 
165         if (reg > AC97_STAC_PAGE0) {
166                 stac9766_ac97_write(codec, AC97_INT_PAGING, 0);
167                 val = soc_ac97_ops->read(ac97, reg - AC97_STAC_PAGE0);
168                 stac9766_ac97_write(codec, AC97_INT_PAGING, 1);
169                 return val;
170         }
171         if (reg / 2 >= ARRAY_SIZE(stac9766_reg))
172                 return -EIO;
173 
174         if (reg == AC97_RESET || reg == AC97_GPIO_STATUS ||
175                 reg == AC97_INT_PAGING || reg == AC97_VENDOR_ID1 ||
176                 reg == AC97_VENDOR_ID2) {
177 
178                 val = soc_ac97_ops->read(ac97, reg);
179                 return val;
180         }
181         return cache[reg / 2];
182 }
183 
184 static int ac97_analog_prepare(struct snd_pcm_substream *substream,
185                                struct snd_soc_dai *dai)
186 {
187         struct snd_soc_codec *codec = dai->codec;
188         struct snd_pcm_runtime *runtime = substream->runtime;
189         unsigned short reg, vra;
190 
191         vra = stac9766_ac97_read(codec, AC97_EXTENDED_STATUS);
192 
193         vra |= 0x1; /* enable variable rate audio */
194         vra &= ~0x4; /* disable SPDIF output */
195 
196         stac9766_ac97_write(codec, AC97_EXTENDED_STATUS, vra);
197 
198         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
199                 reg = AC97_PCM_FRONT_DAC_RATE;
200         else
201                 reg = AC97_PCM_LR_ADC_RATE;
202 
203         return stac9766_ac97_write(codec, reg, runtime->rate);
204 }
205 
206 static int ac97_digital_prepare(struct snd_pcm_substream *substream,
207                                 struct snd_soc_dai *dai)
208 {
209         struct snd_soc_codec *codec = dai->codec;
210         struct snd_pcm_runtime *runtime = substream->runtime;
211         unsigned short reg, vra;
212 
213         stac9766_ac97_write(codec, AC97_SPDIF, 0x2002);
214 
215         vra = stac9766_ac97_read(codec, AC97_EXTENDED_STATUS);
216         vra |= 0x5; /* Enable VRA and SPDIF out */
217 
218         stac9766_ac97_write(codec, AC97_EXTENDED_STATUS, vra);
219 
220         reg = AC97_PCM_FRONT_DAC_RATE;
221 
222         return stac9766_ac97_write(codec, reg, runtime->rate);
223 }
224 
225 static int stac9766_set_bias_level(struct snd_soc_codec *codec,
226                                    enum snd_soc_bias_level level)
227 {
228         switch (level) {
229         case SND_SOC_BIAS_ON: /* full On */
230         case SND_SOC_BIAS_PREPARE: /* partial On */
231         case SND_SOC_BIAS_STANDBY: /* Off, with power */
232                 stac9766_ac97_write(codec, AC97_POWERDOWN, 0x0000);
233                 break;
234         case SND_SOC_BIAS_OFF: /* Off, without power */
235                 /* disable everything including AC link */
236                 stac9766_ac97_write(codec, AC97_POWERDOWN, 0xffff);
237                 break;
238         }
239         codec->dapm.bias_level = level;
240         return 0;
241 }
242 
243 static int stac9766_reset(struct snd_soc_codec *codec, int try_warm)
244 {
245         struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
246 
247         if (try_warm && soc_ac97_ops->warm_reset) {
248                 soc_ac97_ops->warm_reset(ac97);
249                 if (stac9766_ac97_read(codec, 0) == stac9766_reg[0])
250                         return 1;
251         }
252 
253         soc_ac97_ops->reset(ac97);
254         if (soc_ac97_ops->warm_reset)
255                 soc_ac97_ops->warm_reset(ac97);
256         if (stac9766_ac97_read(codec, 0) != stac9766_reg[0])
257                 return -EIO;
258         return 0;
259 }
260 
261 static int stac9766_codec_resume(struct snd_soc_codec *codec)
262 {
263         struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
264         u16 id, reset;
265 
266         reset = 0;
267         /* give the codec an AC97 warm reset to start the link */
268 reset:
269         if (reset > 5) {
270                 dev_err(codec->dev, "Failed to resume\n");
271                 return -EIO;
272         }
273         ac97->bus->ops->warm_reset(ac97);
274         id = soc_ac97_ops->read(ac97, AC97_VENDOR_ID2);
275         if (id != 0x4c13) {
276                 stac9766_reset(codec, 0);
277                 reset++;
278                 goto reset;
279         }
280 
281         return 0;
282 }
283 
284 static const struct snd_soc_dai_ops stac9766_dai_ops_analog = {
285         .prepare = ac97_analog_prepare,
286 };
287 
288 static const struct snd_soc_dai_ops stac9766_dai_ops_digital = {
289         .prepare = ac97_digital_prepare,
290 };
291 
292 static struct snd_soc_dai_driver stac9766_dai[] = {
293 {
294         .name = "stac9766-hifi-analog",
295 
296         /* stream cababilities */
297         .playback = {
298                 .stream_name = "stac9766 analog",
299                 .channels_min = 1,
300                 .channels_max = 2,
301                 .rates = SNDRV_PCM_RATE_8000_48000,
302                 .formats = SND_SOC_STD_AC97_FMTS,
303         },
304         .capture = {
305                 .stream_name = "stac9766 analog",
306                 .channels_min = 1,
307                 .channels_max = 2,
308                 .rates = SNDRV_PCM_RATE_8000_48000,
309                 .formats = SND_SOC_STD_AC97_FMTS,
310         },
311         /* alsa ops */
312         .ops = &stac9766_dai_ops_analog,
313 },
314 {
315         .name = "stac9766-hifi-IEC958",
316 
317         /* stream cababilities */
318         .playback = {
319                 .stream_name = "stac9766 IEC958",
320                 .channels_min = 1,
321                 .channels_max = 2,
322                 .rates = SNDRV_PCM_RATE_32000 | \
323                         SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
324                 .formats = SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE,
325         },
326         /* alsa ops */
327         .ops = &stac9766_dai_ops_digital,
328 }
329 };
330 
331 static int stac9766_codec_probe(struct snd_soc_codec *codec)
332 {
333         struct snd_ac97 *ac97;
334         int ret = 0;
335 
336         ac97 = snd_soc_new_ac97_codec(codec);
337         if (IS_ERR(ac97))
338                 return PTR_ERR(ac97);
339 
340         snd_soc_codec_set_drvdata(codec, ac97);
341 
342         /* do a cold reset for the controller and then try
343          * a warm reset followed by an optional cold reset for codec */
344         stac9766_reset(codec, 0);
345         ret = stac9766_reset(codec, 1);
346         if (ret < 0) {
347                 dev_err(codec->dev, "Failed to reset: AC97 link error\n");
348                 goto codec_err;
349         }
350 
351         return 0;
352 
353 codec_err:
354         snd_soc_free_ac97_codec(ac97);
355         return ret;
356 }
357 
358 static int stac9766_codec_remove(struct snd_soc_codec *codec)
359 {
360         struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
361 
362         snd_soc_free_ac97_codec(ac97);
363         return 0;
364 }
365 
366 static struct snd_soc_codec_driver soc_codec_dev_stac9766 = {
367         .controls = stac9766_snd_ac97_controls,
368         .num_controls = ARRAY_SIZE(stac9766_snd_ac97_controls),
369         .write = stac9766_ac97_write,
370         .read = stac9766_ac97_read,
371         .set_bias_level = stac9766_set_bias_level,
372         .suspend_bias_off = true,
373         .probe = stac9766_codec_probe,
374         .remove = stac9766_codec_remove,
375         .resume = stac9766_codec_resume,
376         .reg_cache_size = ARRAY_SIZE(stac9766_reg),
377         .reg_word_size = sizeof(u16),
378         .reg_cache_step = 2,
379         .reg_cache_default = stac9766_reg,
380 };
381 
382 static int stac9766_probe(struct platform_device *pdev)
383 {
384         return snd_soc_register_codec(&pdev->dev,
385                         &soc_codec_dev_stac9766, stac9766_dai, ARRAY_SIZE(stac9766_dai));
386 }
387 
388 static int stac9766_remove(struct platform_device *pdev)
389 {
390         snd_soc_unregister_codec(&pdev->dev);
391         return 0;
392 }
393 
394 static struct platform_driver stac9766_codec_driver = {
395         .driver = {
396                         .name = "stac9766-codec",
397         },
398 
399         .probe = stac9766_probe,
400         .remove = stac9766_remove,
401 };
402 
403 module_platform_driver(stac9766_codec_driver);
404 
405 MODULE_DESCRIPTION("ASoC stac9766 driver");
406 MODULE_AUTHOR("Jon Smirl <jonsmirl@gmail.com>");
407 MODULE_LICENSE("GPL");
408 

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