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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 const struct soc_enum wm9705_enum_mic =
 71         SOC_ENUM_SINGLE(AC97_GENERAL_PURPOSE, 8, 2, wm9705_mic);
 72 static const struct soc_enum wm9705_enum_rec_l =
 73         SOC_ENUM_SINGLE(AC97_REC_SEL, 8, 8, wm9705_rec_sel);
 74 static const struct soc_enum wm9705_enum_rec_r =
 75         SOC_ENUM_SINGLE(AC97_REC_SEL, 0, 8, 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         u16 *cache = codec->reg_cache;
207 
208         switch (reg) {
209         case AC97_RESET:
210         case AC97_VENDOR_ID1:
211         case AC97_VENDOR_ID2:
212                 return soc_ac97_ops->read(codec->ac97, reg);
213         default:
214                 reg = reg >> 1;
215 
216                 if (reg >= (ARRAY_SIZE(wm9705_reg)))
217                         return -EIO;
218 
219                 return cache[reg];
220         }
221 }
222 
223 static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
224         unsigned int val)
225 {
226         u16 *cache = codec->reg_cache;
227 
228         soc_ac97_ops->write(codec->ac97, reg, val);
229         reg = reg >> 1;
230         if (reg < (ARRAY_SIZE(wm9705_reg)))
231                 cache[reg] = val;
232 
233         return 0;
234 }
235 
236 static int ac97_prepare(struct snd_pcm_substream *substream,
237                         struct snd_soc_dai *dai)
238 {
239         struct snd_soc_codec *codec = dai->codec;
240         int reg;
241         u16 vra;
242 
243         vra = ac97_read(codec, AC97_EXTENDED_STATUS);
244         ac97_write(codec, AC97_EXTENDED_STATUS, vra | 0x1);
245 
246         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
247                 reg = AC97_PCM_FRONT_DAC_RATE;
248         else
249                 reg = AC97_PCM_LR_ADC_RATE;
250 
251         return ac97_write(codec, reg, substream->runtime->rate);
252 }
253 
254 #define WM9705_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | \
255                         SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
256                         SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
257                         SNDRV_PCM_RATE_48000)
258 
259 static const struct snd_soc_dai_ops wm9705_dai_ops = {
260         .prepare        = ac97_prepare,
261 };
262 
263 static struct snd_soc_dai_driver wm9705_dai[] = {
264         {
265                 .name = "wm9705-hifi",
266                 .ac97_control = 1,
267                 .playback = {
268                         .stream_name = "HiFi Playback",
269                         .channels_min = 1,
270                         .channels_max = 2,
271                         .rates = WM9705_AC97_RATES,
272                         .formats = SND_SOC_STD_AC97_FMTS,
273                 },
274                 .capture = {
275                         .stream_name = "HiFi Capture",
276                         .channels_min = 1,
277                         .channels_max = 2,
278                         .rates = WM9705_AC97_RATES,
279                         .formats = SND_SOC_STD_AC97_FMTS,
280                 },
281                 .ops = &wm9705_dai_ops,
282         },
283         {
284                 .name = "wm9705-aux",
285                 .playback = {
286                         .stream_name = "Aux Playback",
287                         .channels_min = 1,
288                         .channels_max = 1,
289                         .rates = WM9705_AC97_RATES,
290                         .formats = SNDRV_PCM_FMTBIT_S16_LE,
291                 },
292         }
293 };
294 
295 static int wm9705_reset(struct snd_soc_codec *codec)
296 {
297         if (soc_ac97_ops->reset) {
298                 soc_ac97_ops->reset(codec->ac97);
299                 if (ac97_read(codec, 0) == wm9705_reg[0])
300                         return 0; /* Success */
301         }
302 
303         return -EIO;
304 }
305 
306 #ifdef CONFIG_PM
307 static int wm9705_soc_suspend(struct snd_soc_codec *codec)
308 {
309         soc_ac97_ops->write(codec->ac97, AC97_POWERDOWN, 0xffff);
310 
311         return 0;
312 }
313 
314 static int wm9705_soc_resume(struct snd_soc_codec *codec)
315 {
316         int i, ret;
317         u16 *cache = codec->reg_cache;
318 
319         ret = wm9705_reset(codec);
320         if (ret < 0) {
321                 printk(KERN_ERR "could not reset AC97 codec\n");
322                 return ret;
323         }
324 
325         for (i = 2; i < ARRAY_SIZE(wm9705_reg) << 1; i += 2) {
326                 soc_ac97_ops->write(codec->ac97, i, cache[i>>1]);
327         }
328 
329         return 0;
330 }
331 #else
332 #define wm9705_soc_suspend NULL
333 #define wm9705_soc_resume NULL
334 #endif
335 
336 static int wm9705_soc_probe(struct snd_soc_codec *codec)
337 {
338         int ret = 0;
339 
340         ret = snd_soc_new_ac97_codec(codec, soc_ac97_ops, 0);
341         if (ret < 0) {
342                 printk(KERN_ERR "wm9705: failed to register AC97 codec\n");
343                 return ret;
344         }
345 
346         ret = wm9705_reset(codec);
347         if (ret)
348                 goto reset_err;
349 
350         snd_soc_add_codec_controls(codec, wm9705_snd_ac97_controls,
351                                 ARRAY_SIZE(wm9705_snd_ac97_controls));
352 
353         return 0;
354 
355 reset_err:
356         snd_soc_free_ac97_codec(codec);
357         return ret;
358 }
359 
360 static int wm9705_soc_remove(struct snd_soc_codec *codec)
361 {
362         snd_soc_free_ac97_codec(codec);
363         return 0;
364 }
365 
366 static struct snd_soc_codec_driver soc_codec_dev_wm9705 = {
367         .probe =        wm9705_soc_probe,
368         .remove =       wm9705_soc_remove,
369         .suspend =      wm9705_soc_suspend,
370         .resume =       wm9705_soc_resume,
371         .read = ac97_read,
372         .write = ac97_write,
373         .reg_cache_size = ARRAY_SIZE(wm9705_reg),
374         .reg_word_size = sizeof(u16),
375         .reg_cache_step = 2,
376         .reg_cache_default = wm9705_reg,
377         .dapm_widgets = wm9705_dapm_widgets,
378         .num_dapm_widgets = ARRAY_SIZE(wm9705_dapm_widgets),
379         .dapm_routes = wm9705_audio_map,
380         .num_dapm_routes = ARRAY_SIZE(wm9705_audio_map),
381 };
382 
383 static int wm9705_probe(struct platform_device *pdev)
384 {
385         return snd_soc_register_codec(&pdev->dev,
386                         &soc_codec_dev_wm9705, wm9705_dai, ARRAY_SIZE(wm9705_dai));
387 }
388 
389 static int wm9705_remove(struct platform_device *pdev)
390 {
391         snd_soc_unregister_codec(&pdev->dev);
392         return 0;
393 }
394 
395 static struct platform_driver wm9705_codec_driver = {
396         .driver = {
397                         .name = "wm9705-codec",
398                         .owner = THIS_MODULE,
399         },
400 
401         .probe = wm9705_probe,
402         .remove = wm9705_remove,
403 };
404 
405 module_platform_driver(wm9705_codec_driver);
406 
407 MODULE_DESCRIPTION("ASoC WM9705 driver");
408 MODULE_AUTHOR("Ian Molton");
409 MODULE_LICENSE("GPL v2");
410 

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