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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         u16 *cache = codec->reg_cache;
143 
144         if (reg > AC97_STAC_PAGE0) {
145                 stac9766_ac97_write(codec, AC97_INT_PAGING, 0);
146                 soc_ac97_ops->write(codec->ac97, reg, val);
147                 stac9766_ac97_write(codec, AC97_INT_PAGING, 1);
148                 return 0;
149         }
150         if (reg / 2 >= ARRAY_SIZE(stac9766_reg))
151                 return -EIO;
152 
153         soc_ac97_ops->write(codec->ac97, reg, val);
154         cache[reg / 2] = val;
155         return 0;
156 }
157 
158 static unsigned int stac9766_ac97_read(struct snd_soc_codec *codec,
159                                        unsigned int reg)
160 {
161         u16 val = 0, *cache = codec->reg_cache;
162 
163         if (reg > AC97_STAC_PAGE0) {
164                 stac9766_ac97_write(codec, AC97_INT_PAGING, 0);
165                 val = soc_ac97_ops->read(codec->ac97, reg - AC97_STAC_PAGE0);
166                 stac9766_ac97_write(codec, AC97_INT_PAGING, 1);
167                 return val;
168         }
169         if (reg / 2 >= ARRAY_SIZE(stac9766_reg))
170                 return -EIO;
171 
172         if (reg == AC97_RESET || reg == AC97_GPIO_STATUS ||
173                 reg == AC97_INT_PAGING || reg == AC97_VENDOR_ID1 ||
174                 reg == AC97_VENDOR_ID2) {
175 
176                 val = soc_ac97_ops->read(codec->ac97, reg);
177                 return val;
178         }
179         return cache[reg / 2];
180 }
181 
182 static int ac97_analog_prepare(struct snd_pcm_substream *substream,
183                                struct snd_soc_dai *dai)
184 {
185         struct snd_soc_codec *codec = dai->codec;
186         struct snd_pcm_runtime *runtime = substream->runtime;
187         unsigned short reg, vra;
188 
189         vra = stac9766_ac97_read(codec, AC97_EXTENDED_STATUS);
190 
191         vra |= 0x1; /* enable variable rate audio */
192         vra &= ~0x4; /* disable SPDIF output */
193 
194         stac9766_ac97_write(codec, AC97_EXTENDED_STATUS, vra);
195 
196         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
197                 reg = AC97_PCM_FRONT_DAC_RATE;
198         else
199                 reg = AC97_PCM_LR_ADC_RATE;
200 
201         return stac9766_ac97_write(codec, reg, runtime->rate);
202 }
203 
204 static int ac97_digital_prepare(struct snd_pcm_substream *substream,
205                                 struct snd_soc_dai *dai)
206 {
207         struct snd_soc_codec *codec = dai->codec;
208         struct snd_pcm_runtime *runtime = substream->runtime;
209         unsigned short reg, vra;
210 
211         stac9766_ac97_write(codec, AC97_SPDIF, 0x2002);
212 
213         vra = stac9766_ac97_read(codec, AC97_EXTENDED_STATUS);
214         vra |= 0x5; /* Enable VRA and SPDIF out */
215 
216         stac9766_ac97_write(codec, AC97_EXTENDED_STATUS, vra);
217 
218         reg = AC97_PCM_FRONT_DAC_RATE;
219 
220         return stac9766_ac97_write(codec, reg, runtime->rate);
221 }
222 
223 static int stac9766_set_bias_level(struct snd_soc_codec *codec,
224                                    enum snd_soc_bias_level level)
225 {
226         switch (level) {
227         case SND_SOC_BIAS_ON: /* full On */
228         case SND_SOC_BIAS_PREPARE: /* partial On */
229         case SND_SOC_BIAS_STANDBY: /* Off, with power */
230                 stac9766_ac97_write(codec, AC97_POWERDOWN, 0x0000);
231                 break;
232         case SND_SOC_BIAS_OFF: /* Off, without power */
233                 /* disable everything including AC link */
234                 stac9766_ac97_write(codec, AC97_POWERDOWN, 0xffff);
235                 break;
236         }
237         codec->dapm.bias_level = level;
238         return 0;
239 }
240 
241 static int stac9766_reset(struct snd_soc_codec *codec, int try_warm)
242 {
243         if (try_warm && soc_ac97_ops->warm_reset) {
244                 soc_ac97_ops->warm_reset(codec->ac97);
245                 if (stac9766_ac97_read(codec, 0) == stac9766_reg[0])
246                         return 1;
247         }
248 
249         soc_ac97_ops->reset(codec->ac97);
250         if (soc_ac97_ops->warm_reset)
251                 soc_ac97_ops->warm_reset(codec->ac97);
252         if (stac9766_ac97_read(codec, 0) != stac9766_reg[0])
253                 return -EIO;
254         return 0;
255 }
256 
257 static int stac9766_codec_suspend(struct snd_soc_codec *codec)
258 {
259         stac9766_set_bias_level(codec, SND_SOC_BIAS_OFF);
260         return 0;
261 }
262 
263 static int stac9766_codec_resume(struct snd_soc_codec *codec)
264 {
265         u16 id, reset;
266 
267         reset = 0;
268         /* give the codec an AC97 warm reset to start the link */
269 reset:
270         if (reset > 5) {
271                 printk(KERN_ERR "stac9766 failed to resume");
272                 return -EIO;
273         }
274         codec->ac97->bus->ops->warm_reset(codec->ac97);
275         id = soc_ac97_ops->read(codec->ac97, AC97_VENDOR_ID2);
276         if (id != 0x4c13) {
277                 stac9766_reset(codec, 0);
278                 reset++;
279                 goto reset;
280         }
281         stac9766_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
282 
283         return 0;
284 }
285 
286 static const struct snd_soc_dai_ops stac9766_dai_ops_analog = {
287         .prepare = ac97_analog_prepare,
288 };
289 
290 static const struct snd_soc_dai_ops stac9766_dai_ops_digital = {
291         .prepare = ac97_digital_prepare,
292 };
293 
294 static struct snd_soc_dai_driver stac9766_dai[] = {
295 {
296         .name = "stac9766-hifi-analog",
297         .ac97_control = 1,
298 
299         /* stream cababilities */
300         .playback = {
301                 .stream_name = "stac9766 analog",
302                 .channels_min = 1,
303                 .channels_max = 2,
304                 .rates = SNDRV_PCM_RATE_8000_48000,
305                 .formats = SND_SOC_STD_AC97_FMTS,
306         },
307         .capture = {
308                 .stream_name = "stac9766 analog",
309                 .channels_min = 1,
310                 .channels_max = 2,
311                 .rates = SNDRV_PCM_RATE_8000_48000,
312                 .formats = SND_SOC_STD_AC97_FMTS,
313         },
314         /* alsa ops */
315         .ops = &stac9766_dai_ops_analog,
316 },
317 {
318         .name = "stac9766-hifi-IEC958",
319         .ac97_control = 1,
320 
321         /* stream cababilities */
322         .playback = {
323                 .stream_name = "stac9766 IEC958",
324                 .channels_min = 1,
325                 .channels_max = 2,
326                 .rates = SNDRV_PCM_RATE_32000 | \
327                         SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
328                 .formats = SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE,
329         },
330         /* alsa ops */
331         .ops = &stac9766_dai_ops_digital,
332 }
333 };
334 
335 static int stac9766_codec_probe(struct snd_soc_codec *codec)
336 {
337         int ret = 0;
338 
339         ret = snd_soc_new_ac97_codec(codec, soc_ac97_ops, 0);
340         if (ret < 0)
341                 goto codec_err;
342 
343         /* do a cold reset for the controller and then try
344          * a warm reset followed by an optional cold reset for codec */
345         stac9766_reset(codec, 0);
346         ret = stac9766_reset(codec, 1);
347         if (ret < 0) {
348                 printk(KERN_ERR "Failed to reset STAC9766: AC97 link error\n");
349                 goto codec_err;
350         }
351 
352         stac9766_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
353 
354         snd_soc_add_codec_controls(codec, stac9766_snd_ac97_controls,
355                              ARRAY_SIZE(stac9766_snd_ac97_controls));
356 
357         return 0;
358 
359 codec_err:
360         snd_soc_free_ac97_codec(codec);
361         return ret;
362 }
363 
364 static int stac9766_codec_remove(struct snd_soc_codec *codec)
365 {
366         snd_soc_free_ac97_codec(codec);
367         return 0;
368 }
369 
370 static struct snd_soc_codec_driver soc_codec_dev_stac9766 = {
371         .write = stac9766_ac97_write,
372         .read = stac9766_ac97_read,
373         .set_bias_level = stac9766_set_bias_level,
374         .probe = stac9766_codec_probe,
375         .remove = stac9766_codec_remove,
376         .suspend = stac9766_codec_suspend,
377         .resume = stac9766_codec_resume,
378         .reg_cache_size = ARRAY_SIZE(stac9766_reg),
379         .reg_word_size = sizeof(u16),
380         .reg_cache_step = 2,
381         .reg_cache_default = stac9766_reg,
382 };
383 
384 static int stac9766_probe(struct platform_device *pdev)
385 {
386         return snd_soc_register_codec(&pdev->dev,
387                         &soc_codec_dev_stac9766, stac9766_dai, ARRAY_SIZE(stac9766_dai));
388 }
389 
390 static int stac9766_remove(struct platform_device *pdev)
391 {
392         snd_soc_unregister_codec(&pdev->dev);
393         return 0;
394 }
395 
396 static struct platform_driver stac9766_codec_driver = {
397         .driver = {
398                         .name = "stac9766-codec",
399                         .owner = THIS_MODULE,
400         },
401 
402         .probe = stac9766_probe,
403         .remove = stac9766_remove,
404 };
405 
406 module_platform_driver(stac9766_codec_driver);
407 
408 MODULE_DESCRIPTION("ASoC stac9766 driver");
409 MODULE_AUTHOR("Jon Smirl <jonsmirl@gmail.com>");
410 MODULE_LICENSE("GPL");
411 

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