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Linux/sound/soc/codecs/wm9705.c

  1 /*
  2  * wm9705.c  --  ALSA Soc WM9705 codec support
  3  *
  4  * Copyright 2008 Ian Molton <spyro@f2s.com>
  5  *
  6  *  This program is free software; you can redistribute  it and/or modify it
  7  *  under  the terms of  the GNU General  Public License as published by the
  8  *  Free Software Foundation; Version 2 of the  License only.
  9  *
 10  */
 11 
 12 #include <linux/init.h>
 13 #include <linux/slab.h>
 14 #include <linux/module.h>
 15 #include <linux/kernel.h>
 16 #include <linux/device.h>
 17 #include <sound/core.h>
 18 #include <sound/pcm.h>
 19 #include <sound/ac97_codec.h>
 20 #include <sound/initval.h>
 21 #include <sound/soc.h>
 22 
 23 #include "wm9705.h"
 24 
 25 /*
 26  * WM9705 register cache
 27  */
 28 static const u16 wm9705_reg[] = {
 29         0x6150, 0x8000, 0x8000, 0x8000, /* 0x0  */
 30         0x0000, 0x8000, 0x8008, 0x8008, /* 0x8  */
 31         0x8808, 0x8808, 0x8808, 0x8808, /* 0x10 */
 32         0x8808, 0x0000, 0x8000, 0x0000, /* 0x18 */
 33         0x0000, 0x0000, 0x0000, 0x000f, /* 0x20 */
 34         0x0605, 0x0000, 0xbb80, 0x0000, /* 0x28 */
 35         0x0000, 0xbb80, 0x0000, 0x0000, /* 0x30 */
 36         0x0000, 0x2000, 0x0000, 0x0000, /* 0x38 */
 37         0x0000, 0x0000, 0x0000, 0x0000, /* 0x40 */
 38         0x0000, 0x0000, 0x0000, 0x0000, /* 0x48 */
 39         0x0000, 0x0000, 0x0000, 0x0000, /* 0x50 */
 40         0x0000, 0x0000, 0x0000, 0x0000, /* 0x58 */
 41         0x0000, 0x0000, 0x0000, 0x0000, /* 0x60 */
 42         0x0000, 0x0000, 0x0000, 0x0000, /* 0x68 */
 43         0x0000, 0x0808, 0x0000, 0x0006, /* 0x70 */
 44         0x0000, 0x0000, 0x574d, 0x4c05, /* 0x78 */
 45 };
 46 
 47 static const struct snd_kcontrol_new wm9705_snd_ac97_controls[] = {
 48         SOC_DOUBLE("Master Playback Volume", AC97_MASTER, 8, 0, 31, 1),
 49         SOC_SINGLE("Master Playback Switch", AC97_MASTER, 15, 1, 1),
 50         SOC_DOUBLE("Headphone Playback Volume", AC97_HEADPHONE, 8, 0, 31, 1),
 51         SOC_SINGLE("Headphone Playback Switch", AC97_HEADPHONE, 15, 1, 1),
 52         SOC_DOUBLE("PCM Playback Volume", AC97_PCM, 8, 0, 31, 1),
 53         SOC_SINGLE("PCM Playback Switch", AC97_PCM, 15, 1, 1),
 54         SOC_SINGLE("Mono Playback Volume", AC97_MASTER_MONO, 0, 31, 1),
 55         SOC_SINGLE("Mono Playback Switch", AC97_MASTER_MONO, 15, 1, 1),
 56         SOC_SINGLE("PCBeep Playback Volume", AC97_PC_BEEP, 1, 15, 1),
 57         SOC_SINGLE("Phone Playback Volume", AC97_PHONE, 0, 31, 1),
 58         SOC_DOUBLE("Line Playback Volume", AC97_LINE, 8, 0, 31, 1),
 59         SOC_DOUBLE("CD Playback Volume", AC97_CD, 8, 0, 31, 1),
 60         SOC_SINGLE("Mic Playback Volume", AC97_MIC, 0, 31, 1),
 61         SOC_SINGLE("Mic 20dB Boost Switch", AC97_MIC, 6, 1, 0),
 62         SOC_DOUBLE("Capture Volume", AC97_REC_GAIN, 8, 0, 15, 0),
 63         SOC_SINGLE("Capture Switch", AC97_REC_GAIN, 15, 1, 1),
 64 };
 65 
 66 static const char *wm9705_mic[] = {"Mic 1", "Mic 2"};
 67 static const char *wm9705_rec_sel[] = {"Mic", "CD", "NC", "NC",
 68         "Line", "Stereo Mix", "Mono Mix", "Phone"};
 69 
 70 static SOC_ENUM_SINGLE_DECL(wm9705_enum_mic,
 71                             AC97_GENERAL_PURPOSE, 8, wm9705_mic);
 72 static SOC_ENUM_SINGLE_DECL(wm9705_enum_rec_l,
 73                             AC97_REC_SEL, 8, wm9705_rec_sel);
 74 static SOC_ENUM_SINGLE_DECL(wm9705_enum_rec_r,
 75                             AC97_REC_SEL, 0, wm9705_rec_sel);
 76 
 77 /* Headphone Mixer */
 78 static const struct snd_kcontrol_new wm9705_hp_mixer_controls[] = {
 79         SOC_DAPM_SINGLE("PCBeep Playback Switch", AC97_PC_BEEP, 15, 1, 1),
 80         SOC_DAPM_SINGLE("CD Playback Switch", AC97_CD, 15, 1, 1),
 81         SOC_DAPM_SINGLE("Mic Playback Switch", AC97_MIC, 15, 1, 1),
 82         SOC_DAPM_SINGLE("Phone Playback Switch", AC97_PHONE, 15, 1, 1),
 83         SOC_DAPM_SINGLE("Line Playback Switch", AC97_LINE, 15, 1, 1),
 84 };
 85 
 86 /* Mic source */
 87 static const struct snd_kcontrol_new wm9705_mic_src_controls =
 88         SOC_DAPM_ENUM("Route", wm9705_enum_mic);
 89 
 90 /* Capture source */
 91 static const struct snd_kcontrol_new wm9705_capture_selectl_controls =
 92         SOC_DAPM_ENUM("Route", wm9705_enum_rec_l);
 93 static const struct snd_kcontrol_new wm9705_capture_selectr_controls =
 94         SOC_DAPM_ENUM("Route", wm9705_enum_rec_r);
 95 
 96 /* DAPM widgets */
 97 static const struct snd_soc_dapm_widget wm9705_dapm_widgets[] = {
 98         SND_SOC_DAPM_MUX("Mic Source", SND_SOC_NOPM, 0, 0,
 99                 &wm9705_mic_src_controls),
100         SND_SOC_DAPM_MUX("Left Capture Source", SND_SOC_NOPM, 0, 0,
101                 &wm9705_capture_selectl_controls),
102         SND_SOC_DAPM_MUX("Right Capture Source", SND_SOC_NOPM, 0, 0,
103                 &wm9705_capture_selectr_controls),
104         SND_SOC_DAPM_DAC("Left DAC", "Left HiFi Playback",
105                 SND_SOC_NOPM, 0, 0),
106         SND_SOC_DAPM_DAC("Right DAC", "Right HiFi Playback",
107                 SND_SOC_NOPM, 0, 0),
108         SND_SOC_DAPM_MIXER_NAMED_CTL("HP Mixer", SND_SOC_NOPM, 0, 0,
109                 &wm9705_hp_mixer_controls[0],
110                 ARRAY_SIZE(wm9705_hp_mixer_controls)),
111         SND_SOC_DAPM_MIXER("Mono Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
112         SND_SOC_DAPM_ADC("Left ADC", "Left HiFi Capture", SND_SOC_NOPM, 0, 0),
113         SND_SOC_DAPM_ADC("Right ADC", "Right HiFi Capture", SND_SOC_NOPM, 0, 0),
114         SND_SOC_DAPM_PGA("Headphone PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
115         SND_SOC_DAPM_PGA("Speaker PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
116         SND_SOC_DAPM_PGA("Line PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
117         SND_SOC_DAPM_PGA("Line out PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
118         SND_SOC_DAPM_PGA("Mono PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
119         SND_SOC_DAPM_PGA("Phone PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
120         SND_SOC_DAPM_PGA("Mic PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
121         SND_SOC_DAPM_PGA("PCBEEP PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
122         SND_SOC_DAPM_PGA("CD PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
123         SND_SOC_DAPM_PGA("ADC PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
124         SND_SOC_DAPM_OUTPUT("HPOUTL"),
125         SND_SOC_DAPM_OUTPUT("HPOUTR"),
126         SND_SOC_DAPM_OUTPUT("LOUT"),
127         SND_SOC_DAPM_OUTPUT("ROUT"),
128         SND_SOC_DAPM_OUTPUT("MONOOUT"),
129         SND_SOC_DAPM_INPUT("PHONE"),
130         SND_SOC_DAPM_INPUT("LINEINL"),
131         SND_SOC_DAPM_INPUT("LINEINR"),
132         SND_SOC_DAPM_INPUT("CDINL"),
133         SND_SOC_DAPM_INPUT("CDINR"),
134         SND_SOC_DAPM_INPUT("PCBEEP"),
135         SND_SOC_DAPM_INPUT("MIC1"),
136         SND_SOC_DAPM_INPUT("MIC2"),
137 };
138 
139 /* Audio map
140  * WM9705 has no switches to disable the route from the inputs to the HP mixer
141  * so in order to prevent active inputs from forcing the audio outputs to be
142  * constantly enabled, we use the mutes on those inputs to simulate such
143  * controls.
144  */
145 static const struct snd_soc_dapm_route wm9705_audio_map[] = {
146         /* HP mixer */
147         {"HP Mixer", "PCBeep Playback Switch", "PCBEEP PGA"},
148         {"HP Mixer", "CD Playback Switch", "CD PGA"},
149         {"HP Mixer", "Mic Playback Switch", "Mic PGA"},
150         {"HP Mixer", "Phone Playback Switch", "Phone PGA"},
151         {"HP Mixer", "Line Playback Switch", "Line PGA"},
152         {"HP Mixer", NULL, "Left DAC"},
153         {"HP Mixer", NULL, "Right DAC"},
154 
155         /* mono mixer */
156         {"Mono Mixer", NULL, "HP Mixer"},
157 
158         /* outputs */
159         {"Headphone PGA", NULL, "HP Mixer"},
160         {"HPOUTL", NULL, "Headphone PGA"},
161         {"HPOUTR", NULL, "Headphone PGA"},
162         {"Line out PGA", NULL, "HP Mixer"},
163         {"LOUT", NULL, "Line out PGA"},
164         {"ROUT", NULL, "Line out PGA"},
165         {"Mono PGA", NULL, "Mono Mixer"},
166         {"MONOOUT", NULL, "Mono PGA"},
167 
168         /* inputs */
169         {"CD PGA", NULL, "CDINL"},
170         {"CD PGA", NULL, "CDINR"},
171         {"Line PGA", NULL, "LINEINL"},
172         {"Line PGA", NULL, "LINEINR"},
173         {"Phone PGA", NULL, "PHONE"},
174         {"Mic Source", "Mic 1", "MIC1"},
175         {"Mic Source", "Mic 2", "MIC2"},
176         {"Mic PGA", NULL, "Mic Source"},
177         {"PCBEEP PGA", NULL, "PCBEEP"},
178 
179         /* Left capture selector */
180         {"Left Capture Source", "Mic", "Mic Source"},
181         {"Left Capture Source", "CD", "CDINL"},
182         {"Left Capture Source", "Line", "LINEINL"},
183         {"Left Capture Source", "Stereo Mix", "HP Mixer"},
184         {"Left Capture Source", "Mono Mix", "HP Mixer"},
185         {"Left Capture Source", "Phone", "PHONE"},
186 
187         /* Right capture source */
188         {"Right Capture Source", "Mic", "Mic Source"},
189         {"Right Capture Source", "CD", "CDINR"},
190         {"Right Capture Source", "Line", "LINEINR"},
191         {"Right Capture Source", "Stereo Mix", "HP Mixer"},
192         {"Right Capture Source", "Mono Mix", "HP Mixer"},
193         {"Right Capture Source", "Phone", "PHONE"},
194 
195         {"ADC PGA", NULL, "Left Capture Source"},
196         {"ADC PGA", NULL, "Right Capture Source"},
197 
198         /* ADC's */
199         {"Left ADC",  NULL, "ADC PGA"},
200         {"Right ADC", NULL, "ADC PGA"},
201 };
202 
203 /* We use a register cache to enhance read performance. */
204 static unsigned int ac97_read(struct snd_soc_codec *codec, unsigned int reg)
205 {
206         struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
207         u16 *cache = codec->reg_cache;
208 
209         switch (reg) {
210         case AC97_RESET:
211         case AC97_VENDOR_ID1:
212         case AC97_VENDOR_ID2:
213                 return soc_ac97_ops->read(ac97, reg);
214         default:
215                 reg = reg >> 1;
216 
217                 if (reg >= (ARRAY_SIZE(wm9705_reg)))
218                         return -EIO;
219 
220                 return cache[reg];
221         }
222 }
223 
224 static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
225         unsigned int val)
226 {
227         struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
228         u16 *cache = codec->reg_cache;
229 
230         soc_ac97_ops->write(ac97, reg, val);
231         reg = reg >> 1;
232         if (reg < (ARRAY_SIZE(wm9705_reg)))
233                 cache[reg] = val;
234 
235         return 0;
236 }
237 
238 static int ac97_prepare(struct snd_pcm_substream *substream,
239                         struct snd_soc_dai *dai)
240 {
241         struct snd_soc_codec *codec = dai->codec;
242         int reg;
243         u16 vra;
244 
245         vra = ac97_read(codec, AC97_EXTENDED_STATUS);
246         ac97_write(codec, AC97_EXTENDED_STATUS, vra | 0x1);
247 
248         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
249                 reg = AC97_PCM_FRONT_DAC_RATE;
250         else
251                 reg = AC97_PCM_LR_ADC_RATE;
252 
253         return ac97_write(codec, reg, substream->runtime->rate);
254 }
255 
256 #define WM9705_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | \
257                         SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
258                         SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
259                         SNDRV_PCM_RATE_48000)
260 
261 static const struct snd_soc_dai_ops wm9705_dai_ops = {
262         .prepare        = ac97_prepare,
263 };
264 
265 static struct snd_soc_dai_driver wm9705_dai[] = {
266         {
267                 .name = "wm9705-hifi",
268                 .playback = {
269                         .stream_name = "HiFi Playback",
270                         .channels_min = 1,
271                         .channels_max = 2,
272                         .rates = WM9705_AC97_RATES,
273                         .formats = SND_SOC_STD_AC97_FMTS,
274                 },
275                 .capture = {
276                         .stream_name = "HiFi Capture",
277                         .channels_min = 1,
278                         .channels_max = 2,
279                         .rates = WM9705_AC97_RATES,
280                         .formats = SND_SOC_STD_AC97_FMTS,
281                 },
282                 .ops = &wm9705_dai_ops,
283         },
284         {
285                 .name = "wm9705-aux",
286                 .playback = {
287                         .stream_name = "Aux Playback",
288                         .channels_min = 1,
289                         .channels_max = 1,
290                         .rates = WM9705_AC97_RATES,
291                         .formats = SNDRV_PCM_FMTBIT_S16_LE,
292                 },
293         }
294 };
295 
296 static int wm9705_reset(struct snd_soc_codec *codec)
297 {
298         struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
299 
300         if (soc_ac97_ops->reset) {
301                 soc_ac97_ops->reset(ac97);
302                 if (ac97_read(codec, 0) == wm9705_reg[0])
303                         return 0; /* Success */
304         }
305 
306         dev_err(codec->dev, "Failed to reset: AC97 link error\n");
307 
308         return -EIO;
309 }
310 
311 #ifdef CONFIG_PM
312 static int wm9705_soc_suspend(struct snd_soc_codec *codec)
313 {
314         struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
315 
316         soc_ac97_ops->write(ac97, AC97_POWERDOWN, 0xffff);
317 
318         return 0;
319 }
320 
321 static int wm9705_soc_resume(struct snd_soc_codec *codec)
322 {
323         struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
324         int i, ret;
325         u16 *cache = codec->reg_cache;
326 
327         ret = wm9705_reset(codec);
328         if (ret < 0)
329                 return ret;
330 
331         for (i = 2; i < ARRAY_SIZE(wm9705_reg) << 1; i += 2) {
332                 soc_ac97_ops->write(ac97, i, cache[i>>1]);
333         }
334 
335         return 0;
336 }
337 #else
338 #define wm9705_soc_suspend NULL
339 #define wm9705_soc_resume NULL
340 #endif
341 
342 static int wm9705_soc_probe(struct snd_soc_codec *codec)
343 {
344         struct snd_ac97 *ac97;
345         int ret = 0;
346 
347         ac97 = snd_soc_alloc_ac97_codec(codec);
348         if (IS_ERR(ac97)) {
349                 ret = PTR_ERR(ac97);
350                 dev_err(codec->dev, "Failed to register AC97 codec\n");
351                 return ret;
352         }
353 
354         ret = wm9705_reset(codec);
355         if (ret)
356                 goto err_put_device;
357 
358         ret = device_add(&ac97->dev);
359         if (ret)
360                 goto err_put_device;
361 
362         snd_soc_codec_set_drvdata(codec, ac97);
363 
364         return 0;
365 
366 err_put_device:
367         put_device(&ac97->dev);
368         return ret;
369 }
370 
371 static int wm9705_soc_remove(struct snd_soc_codec *codec)
372 {
373         struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
374 
375         snd_soc_free_ac97_codec(ac97);
376         return 0;
377 }
378 
379 static struct snd_soc_codec_driver soc_codec_dev_wm9705 = {
380         .probe =        wm9705_soc_probe,
381         .remove =       wm9705_soc_remove,
382         .suspend =      wm9705_soc_suspend,
383         .resume =       wm9705_soc_resume,
384         .read = ac97_read,
385         .write = ac97_write,
386         .reg_cache_size = ARRAY_SIZE(wm9705_reg),
387         .reg_word_size = sizeof(u16),
388         .reg_cache_step = 2,
389         .reg_cache_default = wm9705_reg,
390 
391         .controls = wm9705_snd_ac97_controls,
392         .num_controls = ARRAY_SIZE(wm9705_snd_ac97_controls),
393         .dapm_widgets = wm9705_dapm_widgets,
394         .num_dapm_widgets = ARRAY_SIZE(wm9705_dapm_widgets),
395         .dapm_routes = wm9705_audio_map,
396         .num_dapm_routes = ARRAY_SIZE(wm9705_audio_map),
397 };
398 
399 static int wm9705_probe(struct platform_device *pdev)
400 {
401         return snd_soc_register_codec(&pdev->dev,
402                         &soc_codec_dev_wm9705, wm9705_dai, ARRAY_SIZE(wm9705_dai));
403 }
404 
405 static int wm9705_remove(struct platform_device *pdev)
406 {
407         snd_soc_unregister_codec(&pdev->dev);
408         return 0;
409 }
410 
411 static struct platform_driver wm9705_codec_driver = {
412         .driver = {
413                         .name = "wm9705-codec",
414         },
415 
416         .probe = wm9705_probe,
417         .remove = wm9705_remove,
418 };
419 
420 module_platform_driver(wm9705_codec_driver);
421 
422 MODULE_DESCRIPTION("ASoC WM9705 driver");
423 MODULE_AUTHOR("Ian Molton");
424 MODULE_LICENSE("GPL v2");
425 

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