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TOMOYO Linux Cross Reference
Linux/sound/soc/codecs/wm8960.c

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  1 /*
  2  * wm8960.c  --  WM8960 ALSA SoC Audio driver
  3  *
  4  * Author: Liam Girdwood
  5  *
  6  * This program is free software; you can redistribute it and/or modify
  7  * it under the terms of the GNU General Public License version 2 as
  8  * published by the Free Software Foundation.
  9  */
 10 
 11 #include <linux/module.h>
 12 #include <linux/moduleparam.h>
 13 #include <linux/init.h>
 14 #include <linux/delay.h>
 15 #include <linux/pm.h>
 16 #include <linux/i2c.h>
 17 #include <linux/platform_device.h>
 18 #include <sound/core.h>
 19 #include <sound/pcm.h>
 20 #include <sound/pcm_params.h>
 21 #include <sound/soc.h>
 22 #include <sound/soc-dapm.h>
 23 #include <sound/initval.h>
 24 #include <sound/tlv.h>
 25 
 26 #include "wm8960.h"
 27 
 28 #define AUDIO_NAME "wm8960"
 29 
 30 struct snd_soc_codec_device soc_codec_dev_wm8960;
 31 
 32 /* R25 - Power 1 */
 33 #define WM8960_VREF      0x40
 34 
 35 /* R28 - Anti-pop 1 */
 36 #define WM8960_POBCTRL   0x80
 37 #define WM8960_BUFDCOPEN 0x10
 38 #define WM8960_BUFIOEN   0x08
 39 #define WM8960_SOFT_ST   0x04
 40 #define WM8960_HPSTBY    0x01
 41 
 42 /* R29 - Anti-pop 2 */
 43 #define WM8960_DISOP     0x40
 44 
 45 /*
 46  * wm8960 register cache
 47  * We can't read the WM8960 register space when we are
 48  * using 2 wire for device control, so we cache them instead.
 49  */
 50 static const u16 wm8960_reg[WM8960_CACHEREGNUM] = {
 51         0x0097, 0x0097, 0x0000, 0x0000,
 52         0x0000, 0x0008, 0x0000, 0x000a,
 53         0x01c0, 0x0000, 0x00ff, 0x00ff,
 54         0x0000, 0x0000, 0x0000, 0x0000,
 55         0x0000, 0x007b, 0x0100, 0x0032,
 56         0x0000, 0x00c3, 0x00c3, 0x01c0,
 57         0x0000, 0x0000, 0x0000, 0x0000,
 58         0x0000, 0x0000, 0x0000, 0x0000,
 59         0x0100, 0x0100, 0x0050, 0x0050,
 60         0x0050, 0x0050, 0x0000, 0x0000,
 61         0x0000, 0x0000, 0x0040, 0x0000,
 62         0x0000, 0x0050, 0x0050, 0x0000,
 63         0x0002, 0x0037, 0x004d, 0x0080,
 64         0x0008, 0x0031, 0x0026, 0x00e9,
 65 };
 66 
 67 struct wm8960_priv {
 68         u16 reg_cache[WM8960_CACHEREGNUM];
 69         struct snd_soc_codec codec;
 70 };
 71 
 72 #define wm8960_reset(c) snd_soc_write(c, WM8960_RESET, 0)
 73 
 74 /* enumerated controls */
 75 static const char *wm8960_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
 76 static const char *wm8960_polarity[] = {"No Inversion", "Left Inverted",
 77         "Right Inverted", "Stereo Inversion"};
 78 static const char *wm8960_3d_upper_cutoff[] = {"High", "Low"};
 79 static const char *wm8960_3d_lower_cutoff[] = {"Low", "High"};
 80 static const char *wm8960_alcfunc[] = {"Off", "Right", "Left", "Stereo"};
 81 static const char *wm8960_alcmode[] = {"ALC", "Limiter"};
 82 
 83 static const struct soc_enum wm8960_enum[] = {
 84         SOC_ENUM_SINGLE(WM8960_DACCTL1, 1, 4, wm8960_deemph),
 85         SOC_ENUM_SINGLE(WM8960_DACCTL1, 5, 4, wm8960_polarity),
 86         SOC_ENUM_SINGLE(WM8960_DACCTL2, 5, 4, wm8960_polarity),
 87         SOC_ENUM_SINGLE(WM8960_3D, 6, 2, wm8960_3d_upper_cutoff),
 88         SOC_ENUM_SINGLE(WM8960_3D, 5, 2, wm8960_3d_lower_cutoff),
 89         SOC_ENUM_SINGLE(WM8960_ALC1, 7, 4, wm8960_alcfunc),
 90         SOC_ENUM_SINGLE(WM8960_ALC3, 8, 2, wm8960_alcmode),
 91 };
 92 
 93 static const DECLARE_TLV_DB_SCALE(adc_tlv, -9700, 50, 0);
 94 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 50, 1);
 95 static const DECLARE_TLV_DB_SCALE(bypass_tlv, -2100, 300, 0);
 96 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
 97 
 98 static const struct snd_kcontrol_new wm8960_snd_controls[] = {
 99 SOC_DOUBLE_R_TLV("Capture Volume", WM8960_LINVOL, WM8960_RINVOL,
100                  0, 63, 0, adc_tlv),
101 SOC_DOUBLE_R("Capture Volume ZC Switch", WM8960_LINVOL, WM8960_RINVOL,
102         6, 1, 0),
103 SOC_DOUBLE_R("Capture Switch", WM8960_LINVOL, WM8960_RINVOL,
104         7, 1, 0),
105 
106 SOC_DOUBLE_R_TLV("Playback Volume", WM8960_LDAC, WM8960_RDAC,
107                  0, 255, 0, dac_tlv),
108 
109 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8960_LOUT1, WM8960_ROUT1,
110                  0, 127, 0, out_tlv),
111 SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8960_LOUT1, WM8960_ROUT1,
112         7, 1, 0),
113 
114 SOC_DOUBLE_R_TLV("Speaker Playback Volume", WM8960_LOUT2, WM8960_ROUT2,
115                  0, 127, 0, out_tlv),
116 SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8960_LOUT2, WM8960_ROUT2,
117         7, 1, 0),
118 SOC_SINGLE("Speaker DC Volume", WM8960_CLASSD3, 3, 5, 0),
119 SOC_SINGLE("Speaker AC Volume", WM8960_CLASSD3, 0, 5, 0),
120 
121 SOC_SINGLE("PCM Playback -6dB Switch", WM8960_DACCTL1, 7, 1, 0),
122 SOC_ENUM("ADC Polarity", wm8960_enum[1]),
123 SOC_ENUM("Playback De-emphasis", wm8960_enum[0]),
124 SOC_SINGLE("ADC High Pass Filter Switch", WM8960_DACCTL1, 0, 1, 0),
125 
126 SOC_ENUM("DAC Polarity", wm8960_enum[2]),
127 
128 SOC_ENUM("3D Filter Upper Cut-Off", wm8960_enum[3]),
129 SOC_ENUM("3D Filter Lower Cut-Off", wm8960_enum[4]),
130 SOC_SINGLE("3D Volume", WM8960_3D, 1, 15, 0),
131 SOC_SINGLE("3D Switch", WM8960_3D, 0, 1, 0),
132 
133 SOC_ENUM("ALC Function", wm8960_enum[5]),
134 SOC_SINGLE("ALC Max Gain", WM8960_ALC1, 4, 7, 0),
135 SOC_SINGLE("ALC Target", WM8960_ALC1, 0, 15, 1),
136 SOC_SINGLE("ALC Min Gain", WM8960_ALC2, 4, 7, 0),
137 SOC_SINGLE("ALC Hold Time", WM8960_ALC2, 0, 15, 0),
138 SOC_ENUM("ALC Mode", wm8960_enum[6]),
139 SOC_SINGLE("ALC Decay", WM8960_ALC3, 4, 15, 0),
140 SOC_SINGLE("ALC Attack", WM8960_ALC3, 0, 15, 0),
141 
142 SOC_SINGLE("Noise Gate Threshold", WM8960_NOISEG, 3, 31, 0),
143 SOC_SINGLE("Noise Gate Switch", WM8960_NOISEG, 0, 1, 0),
144 
145 SOC_DOUBLE_R("ADC PCM Capture Volume", WM8960_LINPATH, WM8960_RINPATH,
146         0, 127, 0),
147 
148 SOC_SINGLE_TLV("Left Output Mixer Boost Bypass Volume",
149                WM8960_BYPASS1, 4, 7, 1, bypass_tlv),
150 SOC_SINGLE_TLV("Left Output Mixer LINPUT3 Volume",
151                WM8960_LOUTMIX, 4, 7, 1, bypass_tlv),
152 SOC_SINGLE_TLV("Right Output Mixer Boost Bypass Volume",
153                WM8960_BYPASS2, 4, 7, 1, bypass_tlv),
154 SOC_SINGLE_TLV("Right Output Mixer RINPUT3 Volume",
155                WM8960_ROUTMIX, 4, 7, 1, bypass_tlv),
156 };
157 
158 static const struct snd_kcontrol_new wm8960_lin_boost[] = {
159 SOC_DAPM_SINGLE("LINPUT2 Switch", WM8960_LINPATH, 6, 1, 0),
160 SOC_DAPM_SINGLE("LINPUT3 Switch", WM8960_LINPATH, 7, 1, 0),
161 SOC_DAPM_SINGLE("LINPUT1 Switch", WM8960_LINPATH, 8, 1, 0),
162 };
163 
164 static const struct snd_kcontrol_new wm8960_lin[] = {
165 SOC_DAPM_SINGLE("Boost Switch", WM8960_LINPATH, 3, 1, 0),
166 };
167 
168 static const struct snd_kcontrol_new wm8960_rin_boost[] = {
169 SOC_DAPM_SINGLE("RINPUT2 Switch", WM8960_RINPATH, 6, 1, 0),
170 SOC_DAPM_SINGLE("RINPUT3 Switch", WM8960_RINPATH, 7, 1, 0),
171 SOC_DAPM_SINGLE("RINPUT1 Switch", WM8960_RINPATH, 8, 1, 0),
172 };
173 
174 static const struct snd_kcontrol_new wm8960_rin[] = {
175 SOC_DAPM_SINGLE("Boost Switch", WM8960_RINPATH, 3, 1, 0),
176 };
177 
178 static const struct snd_kcontrol_new wm8960_loutput_mixer[] = {
179 SOC_DAPM_SINGLE("PCM Playback Switch", WM8960_LOUTMIX, 8, 1, 0),
180 SOC_DAPM_SINGLE("LINPUT3 Switch", WM8960_LOUTMIX, 7, 1, 0),
181 SOC_DAPM_SINGLE("Boost Bypass Switch", WM8960_BYPASS1, 7, 1, 0),
182 };
183 
184 static const struct snd_kcontrol_new wm8960_routput_mixer[] = {
185 SOC_DAPM_SINGLE("PCM Playback Switch", WM8960_ROUTMIX, 8, 1, 0),
186 SOC_DAPM_SINGLE("RINPUT3 Switch", WM8960_ROUTMIX, 7, 1, 0),
187 SOC_DAPM_SINGLE("Boost Bypass Switch", WM8960_BYPASS2, 7, 1, 0),
188 };
189 
190 static const struct snd_kcontrol_new wm8960_mono_out[] = {
191 SOC_DAPM_SINGLE("Left Switch", WM8960_MONOMIX1, 7, 1, 0),
192 SOC_DAPM_SINGLE("Right Switch", WM8960_MONOMIX2, 7, 1, 0),
193 };
194 
195 static const struct snd_soc_dapm_widget wm8960_dapm_widgets[] = {
196 SND_SOC_DAPM_INPUT("LINPUT1"),
197 SND_SOC_DAPM_INPUT("RINPUT1"),
198 SND_SOC_DAPM_INPUT("LINPUT2"),
199 SND_SOC_DAPM_INPUT("RINPUT2"),
200 SND_SOC_DAPM_INPUT("LINPUT3"),
201 SND_SOC_DAPM_INPUT("RINPUT3"),
202 
203 SND_SOC_DAPM_MICBIAS("MICB", WM8960_POWER1, 1, 0),
204 
205 SND_SOC_DAPM_MIXER("Left Boost Mixer", WM8960_POWER1, 5, 0,
206                    wm8960_lin_boost, ARRAY_SIZE(wm8960_lin_boost)),
207 SND_SOC_DAPM_MIXER("Right Boost Mixer", WM8960_POWER1, 4, 0,
208                    wm8960_rin_boost, ARRAY_SIZE(wm8960_rin_boost)),
209 
210 SND_SOC_DAPM_MIXER("Left Input Mixer", WM8960_POWER3, 5, 0,
211                    wm8960_lin, ARRAY_SIZE(wm8960_lin)),
212 SND_SOC_DAPM_MIXER("Right Input Mixer", WM8960_POWER3, 4, 0,
213                    wm8960_rin, ARRAY_SIZE(wm8960_rin)),
214 
215 SND_SOC_DAPM_ADC("Left ADC", "Capture", WM8960_POWER2, 3, 0),
216 SND_SOC_DAPM_ADC("Right ADC", "Capture", WM8960_POWER2, 2, 0),
217 
218 SND_SOC_DAPM_DAC("Left DAC", "Playback", WM8960_POWER2, 8, 0),
219 SND_SOC_DAPM_DAC("Right DAC", "Playback", WM8960_POWER2, 7, 0),
220 
221 SND_SOC_DAPM_MIXER("Left Output Mixer", WM8960_POWER3, 3, 0,
222         &wm8960_loutput_mixer[0],
223         ARRAY_SIZE(wm8960_loutput_mixer)),
224 SND_SOC_DAPM_MIXER("Right Output Mixer", WM8960_POWER3, 2, 0,
225         &wm8960_routput_mixer[0],
226         ARRAY_SIZE(wm8960_routput_mixer)),
227 
228 SND_SOC_DAPM_MIXER("Mono Output Mixer", WM8960_POWER2, 1, 0,
229         &wm8960_mono_out[0],
230         ARRAY_SIZE(wm8960_mono_out)),
231 
232 SND_SOC_DAPM_PGA("LOUT1 PGA", WM8960_POWER2, 6, 0, NULL, 0),
233 SND_SOC_DAPM_PGA("ROUT1 PGA", WM8960_POWER2, 5, 0, NULL, 0),
234 
235 SND_SOC_DAPM_PGA("Left Speaker PGA", WM8960_POWER2, 4, 0, NULL, 0),
236 SND_SOC_DAPM_PGA("Right Speaker PGA", WM8960_POWER2, 3, 0, NULL, 0),
237 
238 SND_SOC_DAPM_PGA("Right Speaker Output", WM8960_CLASSD1, 7, 0, NULL, 0),
239 SND_SOC_DAPM_PGA("Left Speaker Output", WM8960_CLASSD1, 6, 0, NULL, 0),
240 
241 SND_SOC_DAPM_OUTPUT("SPK_LP"),
242 SND_SOC_DAPM_OUTPUT("SPK_LN"),
243 SND_SOC_DAPM_OUTPUT("HP_L"),
244 SND_SOC_DAPM_OUTPUT("HP_R"),
245 SND_SOC_DAPM_OUTPUT("SPK_RP"),
246 SND_SOC_DAPM_OUTPUT("SPK_RN"),
247 SND_SOC_DAPM_OUTPUT("OUT3"),
248 };
249 
250 static const struct snd_soc_dapm_route audio_paths[] = {
251         { "Left Boost Mixer", "LINPUT1 Switch", "LINPUT1" },
252         { "Left Boost Mixer", "LINPUT2 Switch", "LINPUT2" },
253         { "Left Boost Mixer", "LINPUT3 Switch", "LINPUT3" },
254 
255         { "Left Input Mixer", "Boost Switch", "Left Boost Mixer", },
256         { "Left Input Mixer", NULL, "LINPUT1", },  /* Really Boost Switch */
257         { "Left Input Mixer", NULL, "LINPUT2" },
258         { "Left Input Mixer", NULL, "LINPUT3" },
259 
260         { "Right Boost Mixer", "RINPUT1 Switch", "RINPUT1" },
261         { "Right Boost Mixer", "RINPUT2 Switch", "RINPUT2" },
262         { "Right Boost Mixer", "RINPUT3 Switch", "RINPUT3" },
263 
264         { "Right Input Mixer", "Boost Switch", "Right Boost Mixer", },
265         { "Right Input Mixer", NULL, "RINPUT1", },  /* Really Boost Switch */
266         { "Right Input Mixer", NULL, "RINPUT2" },
267         { "Right Input Mixer", NULL, "LINPUT3" },
268 
269         { "Left ADC", NULL, "Left Input Mixer" },
270         { "Right ADC", NULL, "Right Input Mixer" },
271 
272         { "Left Output Mixer", "LINPUT3 Switch", "LINPUT3" },
273         { "Left Output Mixer", "Boost Bypass Switch", "Left Boost Mixer"} ,
274         { "Left Output Mixer", "PCM Playback Switch", "Left DAC" },
275 
276         { "Right Output Mixer", "RINPUT3 Switch", "RINPUT3" },
277         { "Right Output Mixer", "Boost Bypass Switch", "Right Boost Mixer" } ,
278         { "Right Output Mixer", "PCM Playback Switch", "Right DAC" },
279 
280         { "Mono Output Mixer", "Left Switch", "Left Output Mixer" },
281         { "Mono Output Mixer", "Right Switch", "Right Output Mixer" },
282 
283         { "LOUT1 PGA", NULL, "Left Output Mixer" },
284         { "ROUT1 PGA", NULL, "Right Output Mixer" },
285 
286         { "HP_L", NULL, "LOUT1 PGA" },
287         { "HP_R", NULL, "ROUT1 PGA" },
288 
289         { "Left Speaker PGA", NULL, "Left Output Mixer" },
290         { "Right Speaker PGA", NULL, "Right Output Mixer" },
291 
292         { "Left Speaker Output", NULL, "Left Speaker PGA" },
293         { "Right Speaker Output", NULL, "Right Speaker PGA" },
294 
295         { "SPK_LN", NULL, "Left Speaker Output" },
296         { "SPK_LP", NULL, "Left Speaker Output" },
297         { "SPK_RN", NULL, "Right Speaker Output" },
298         { "SPK_RP", NULL, "Right Speaker Output" },
299 
300         { "OUT3", NULL, "Mono Output Mixer", }
301 };
302 
303 static int wm8960_add_widgets(struct snd_soc_codec *codec)
304 {
305         snd_soc_dapm_new_controls(codec, wm8960_dapm_widgets,
306                                   ARRAY_SIZE(wm8960_dapm_widgets));
307 
308         snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));
309 
310         snd_soc_dapm_new_widgets(codec);
311         return 0;
312 }
313 
314 static int wm8960_set_dai_fmt(struct snd_soc_dai *codec_dai,
315                 unsigned int fmt)
316 {
317         struct snd_soc_codec *codec = codec_dai->codec;
318         u16 iface = 0;
319 
320         /* set master/slave audio interface */
321         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
322         case SND_SOC_DAIFMT_CBM_CFM:
323                 iface |= 0x0040;
324                 break;
325         case SND_SOC_DAIFMT_CBS_CFS:
326                 break;
327         default:
328                 return -EINVAL;
329         }
330 
331         /* interface format */
332         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
333         case SND_SOC_DAIFMT_I2S:
334                 iface |= 0x0002;
335                 break;
336         case SND_SOC_DAIFMT_RIGHT_J:
337                 break;
338         case SND_SOC_DAIFMT_LEFT_J:
339                 iface |= 0x0001;
340                 break;
341         case SND_SOC_DAIFMT_DSP_A:
342                 iface |= 0x0003;
343                 break;
344         case SND_SOC_DAIFMT_DSP_B:
345                 iface |= 0x0013;
346                 break;
347         default:
348                 return -EINVAL;
349         }
350 
351         /* clock inversion */
352         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
353         case SND_SOC_DAIFMT_NB_NF:
354                 break;
355         case SND_SOC_DAIFMT_IB_IF:
356                 iface |= 0x0090;
357                 break;
358         case SND_SOC_DAIFMT_IB_NF:
359                 iface |= 0x0080;
360                 break;
361         case SND_SOC_DAIFMT_NB_IF:
362                 iface |= 0x0010;
363                 break;
364         default:
365                 return -EINVAL;
366         }
367 
368         /* set iface */
369         snd_soc_write(codec, WM8960_IFACE1, iface);
370         return 0;
371 }
372 
373 static int wm8960_hw_params(struct snd_pcm_substream *substream,
374                             struct snd_pcm_hw_params *params,
375                             struct snd_soc_dai *dai)
376 {
377         struct snd_soc_pcm_runtime *rtd = substream->private_data;
378         struct snd_soc_device *socdev = rtd->socdev;
379         struct snd_soc_codec *codec = socdev->card->codec;
380         u16 iface = snd_soc_read(codec, WM8960_IFACE1) & 0xfff3;
381 
382         /* bit size */
383         switch (params_format(params)) {
384         case SNDRV_PCM_FORMAT_S16_LE:
385                 break;
386         case SNDRV_PCM_FORMAT_S20_3LE:
387                 iface |= 0x0004;
388                 break;
389         case SNDRV_PCM_FORMAT_S24_LE:
390                 iface |= 0x0008;
391                 break;
392         }
393 
394         /* set iface */
395         snd_soc_write(codec, WM8960_IFACE1, iface);
396         return 0;
397 }
398 
399 static int wm8960_mute(struct snd_soc_dai *dai, int mute)
400 {
401         struct snd_soc_codec *codec = dai->codec;
402         u16 mute_reg = snd_soc_read(codec, WM8960_DACCTL1) & 0xfff7;
403 
404         if (mute)
405                 snd_soc_write(codec, WM8960_DACCTL1, mute_reg | 0x8);
406         else
407                 snd_soc_write(codec, WM8960_DACCTL1, mute_reg);
408         return 0;
409 }
410 
411 static int wm8960_set_bias_level(struct snd_soc_codec *codec,
412                                  enum snd_soc_bias_level level)
413 {
414         struct wm8960_data *pdata = codec->dev->platform_data;
415         u16 reg;
416 
417         switch (level) {
418         case SND_SOC_BIAS_ON:
419                 break;
420 
421         case SND_SOC_BIAS_PREPARE:
422                 /* Set VMID to 2x50k */
423                 reg = snd_soc_read(codec, WM8960_POWER1);
424                 reg &= ~0x180;
425                 reg |= 0x80;
426                 snd_soc_write(codec, WM8960_POWER1, reg);
427                 break;
428 
429         case SND_SOC_BIAS_STANDBY:
430                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
431                         /* Enable anti-pop features */
432                         snd_soc_write(codec, WM8960_APOP1,
433                                      WM8960_POBCTRL | WM8960_SOFT_ST |
434                                      WM8960_BUFDCOPEN | WM8960_BUFIOEN);
435 
436                         /* Discharge HP output */
437                         reg = WM8960_DISOP;
438                         if (pdata)
439                                 reg |= pdata->dres << 4;
440                         snd_soc_write(codec, WM8960_APOP2, reg);
441 
442                         msleep(400);
443 
444                         snd_soc_write(codec, WM8960_APOP2, 0);
445 
446                         /* Enable & ramp VMID at 2x50k */
447                         reg = snd_soc_read(codec, WM8960_POWER1);
448                         reg |= 0x80;
449                         snd_soc_write(codec, WM8960_POWER1, reg);
450                         msleep(100);
451 
452                         /* Enable VREF */
453                         snd_soc_write(codec, WM8960_POWER1, reg | WM8960_VREF);
454 
455                         /* Disable anti-pop features */
456                         snd_soc_write(codec, WM8960_APOP1, WM8960_BUFIOEN);
457                 }
458 
459                 /* Set VMID to 2x250k */
460                 reg = snd_soc_read(codec, WM8960_POWER1);
461                 reg &= ~0x180;
462                 reg |= 0x100;
463                 snd_soc_write(codec, WM8960_POWER1, reg);
464                 break;
465 
466         case SND_SOC_BIAS_OFF:
467                 /* Enable anti-pop features */
468                 snd_soc_write(codec, WM8960_APOP1,
469                              WM8960_POBCTRL | WM8960_SOFT_ST |
470                              WM8960_BUFDCOPEN | WM8960_BUFIOEN);
471 
472                 /* Disable VMID and VREF, let them discharge */
473                 snd_soc_write(codec, WM8960_POWER1, 0);
474                 msleep(600);
475 
476                 snd_soc_write(codec, WM8960_APOP1, 0);
477                 break;
478         }
479 
480         codec->bias_level = level;
481 
482         return 0;
483 }
484 
485 /* PLL divisors */
486 struct _pll_div {
487         u32 pre_div:1;
488         u32 n:4;
489         u32 k:24;
490 };
491 
492 /* The size in bits of the pll divide multiplied by 10
493  * to allow rounding later */
494 #define FIXED_PLL_SIZE ((1 << 24) * 10)
495 
496 static int pll_factors(unsigned int source, unsigned int target,
497                        struct _pll_div *pll_div)
498 {
499         unsigned long long Kpart;
500         unsigned int K, Ndiv, Nmod;
501 
502         pr_debug("WM8960 PLL: setting %dHz->%dHz\n", source, target);
503 
504         /* Scale up target to PLL operating frequency */
505         target *= 4;
506 
507         Ndiv = target / source;
508         if (Ndiv < 6) {
509                 source >>= 1;
510                 pll_div->pre_div = 1;
511                 Ndiv = target / source;
512         } else
513                 pll_div->pre_div = 0;
514 
515         if ((Ndiv < 6) || (Ndiv > 12)) {
516                 pr_err("WM8960 PLL: Unsupported N=%d\n", Ndiv);
517                 return -EINVAL;
518         }
519 
520         pll_div->n = Ndiv;
521         Nmod = target % source;
522         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
523 
524         do_div(Kpart, source);
525 
526         K = Kpart & 0xFFFFFFFF;
527 
528         /* Check if we need to round */
529         if ((K % 10) >= 5)
530                 K += 5;
531 
532         /* Move down to proper range now rounding is done */
533         K /= 10;
534 
535         pll_div->k = K;
536 
537         pr_debug("WM8960 PLL: N=%x K=%x pre_div=%d\n",
538                  pll_div->n, pll_div->k, pll_div->pre_div);
539 
540         return 0;
541 }
542 
543 static int wm8960_set_dai_pll(struct snd_soc_dai *codec_dai,
544                 int pll_id, unsigned int freq_in, unsigned int freq_out)
545 {
546         struct snd_soc_codec *codec = codec_dai->codec;
547         u16 reg;
548         static struct _pll_div pll_div;
549         int ret;
550 
551         if (freq_in && freq_out) {
552                 ret = pll_factors(freq_in, freq_out, &pll_div);
553                 if (ret != 0)
554                         return ret;
555         }
556 
557         /* Disable the PLL: even if we are changing the frequency the
558          * PLL needs to be disabled while we do so. */
559         snd_soc_write(codec, WM8960_CLOCK1,
560                      snd_soc_read(codec, WM8960_CLOCK1) & ~1);
561         snd_soc_write(codec, WM8960_POWER2,
562                      snd_soc_read(codec, WM8960_POWER2) & ~1);
563 
564         if (!freq_in || !freq_out)
565                 return 0;
566 
567         reg = snd_soc_read(codec, WM8960_PLL1) & ~0x3f;
568         reg |= pll_div.pre_div << 4;
569         reg |= pll_div.n;
570 
571         if (pll_div.k) {
572                 reg |= 0x20;
573 
574                 snd_soc_write(codec, WM8960_PLL2, (pll_div.k >> 18) & 0x3f);
575                 snd_soc_write(codec, WM8960_PLL3, (pll_div.k >> 9) & 0x1ff);
576                 snd_soc_write(codec, WM8960_PLL4, pll_div.k & 0x1ff);
577         }
578         snd_soc_write(codec, WM8960_PLL1, reg);
579 
580         /* Turn it on */
581         snd_soc_write(codec, WM8960_POWER2,
582                      snd_soc_read(codec, WM8960_POWER2) | 1);
583         msleep(250);
584         snd_soc_write(codec, WM8960_CLOCK1,
585                      snd_soc_read(codec, WM8960_CLOCK1) | 1);
586 
587         return 0;
588 }
589 
590 static int wm8960_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
591                 int div_id, int div)
592 {
593         struct snd_soc_codec *codec = codec_dai->codec;
594         u16 reg;
595 
596         switch (div_id) {
597         case WM8960_SYSCLKSEL:
598                 reg = snd_soc_read(codec, WM8960_CLOCK1) & 0x1fe;
599                 snd_soc_write(codec, WM8960_CLOCK1, reg | div);
600                 break;
601         case WM8960_SYSCLKDIV:
602                 reg = snd_soc_read(codec, WM8960_CLOCK1) & 0x1f9;
603                 snd_soc_write(codec, WM8960_CLOCK1, reg | div);
604                 break;
605         case WM8960_DACDIV:
606                 reg = snd_soc_read(codec, WM8960_CLOCK1) & 0x1c7;
607                 snd_soc_write(codec, WM8960_CLOCK1, reg | div);
608                 break;
609         case WM8960_OPCLKDIV:
610                 reg = snd_soc_read(codec, WM8960_PLL1) & 0x03f;
611                 snd_soc_write(codec, WM8960_PLL1, reg | div);
612                 break;
613         case WM8960_DCLKDIV:
614                 reg = snd_soc_read(codec, WM8960_CLOCK2) & 0x03f;
615                 snd_soc_write(codec, WM8960_CLOCK2, reg | div);
616                 break;
617         case WM8960_TOCLKSEL:
618                 reg = snd_soc_read(codec, WM8960_ADDCTL1) & 0x1fd;
619                 snd_soc_write(codec, WM8960_ADDCTL1, reg | div);
620                 break;
621         default:
622                 return -EINVAL;
623         }
624 
625         return 0;
626 }
627 
628 #define WM8960_RATES SNDRV_PCM_RATE_8000_48000
629 
630 #define WM8960_FORMATS \
631         (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
632         SNDRV_PCM_FMTBIT_S24_LE)
633 
634 static struct snd_soc_dai_ops wm8960_dai_ops = {
635         .hw_params = wm8960_hw_params,
636         .digital_mute = wm8960_mute,
637         .set_fmt = wm8960_set_dai_fmt,
638         .set_clkdiv = wm8960_set_dai_clkdiv,
639         .set_pll = wm8960_set_dai_pll,
640 };
641 
642 struct snd_soc_dai wm8960_dai = {
643         .name = "WM8960",
644         .playback = {
645                 .stream_name = "Playback",
646                 .channels_min = 1,
647                 .channels_max = 2,
648                 .rates = WM8960_RATES,
649                 .formats = WM8960_FORMATS,},
650         .capture = {
651                 .stream_name = "Capture",
652                 .channels_min = 1,
653                 .channels_max = 2,
654                 .rates = WM8960_RATES,
655                 .formats = WM8960_FORMATS,},
656         .ops = &wm8960_dai_ops,
657         .symmetric_rates = 1,
658 };
659 EXPORT_SYMBOL_GPL(wm8960_dai);
660 
661 static int wm8960_suspend(struct platform_device *pdev, pm_message_t state)
662 {
663         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
664         struct snd_soc_codec *codec = socdev->card->codec;
665 
666         wm8960_set_bias_level(codec, SND_SOC_BIAS_OFF);
667         return 0;
668 }
669 
670 static int wm8960_resume(struct platform_device *pdev)
671 {
672         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
673         struct snd_soc_codec *codec = socdev->card->codec;
674         int i;
675         u8 data[2];
676         u16 *cache = codec->reg_cache;
677 
678         /* Sync reg_cache with the hardware */
679         for (i = 0; i < ARRAY_SIZE(wm8960_reg); i++) {
680                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
681                 data[1] = cache[i] & 0x00ff;
682                 codec->hw_write(codec->control_data, data, 2);
683         }
684 
685         wm8960_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
686         wm8960_set_bias_level(codec, codec->suspend_bias_level);
687         return 0;
688 }
689 
690 static struct snd_soc_codec *wm8960_codec;
691 
692 static int wm8960_probe(struct platform_device *pdev)
693 {
694         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
695         struct snd_soc_codec *codec;
696         int ret = 0;
697 
698         if (wm8960_codec == NULL) {
699                 dev_err(&pdev->dev, "Codec device not registered\n");
700                 return -ENODEV;
701         }
702 
703         socdev->card->codec = wm8960_codec;
704         codec = wm8960_codec;
705 
706         /* register pcms */
707         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
708         if (ret < 0) {
709                 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
710                 goto pcm_err;
711         }
712 
713         snd_soc_add_controls(codec, wm8960_snd_controls,
714                              ARRAY_SIZE(wm8960_snd_controls));
715         wm8960_add_widgets(codec);
716         ret = snd_soc_init_card(socdev);
717         if (ret < 0) {
718                 dev_err(codec->dev, "failed to register card: %d\n", ret);
719                 goto card_err;
720         }
721 
722         return ret;
723 
724 card_err:
725         snd_soc_free_pcms(socdev);
726         snd_soc_dapm_free(socdev);
727 pcm_err:
728         return ret;
729 }
730 
731 /* power down chip */
732 static int wm8960_remove(struct platform_device *pdev)
733 {
734         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
735 
736         snd_soc_free_pcms(socdev);
737         snd_soc_dapm_free(socdev);
738 
739         return 0;
740 }
741 
742 struct snd_soc_codec_device soc_codec_dev_wm8960 = {
743         .probe =        wm8960_probe,
744         .remove =       wm8960_remove,
745         .suspend =      wm8960_suspend,
746         .resume =       wm8960_resume,
747 };
748 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8960);
749 
750 static int wm8960_register(struct wm8960_priv *wm8960,
751                            enum snd_soc_control_type control)
752 {
753         struct wm8960_data *pdata = wm8960->codec.dev->platform_data;
754         struct snd_soc_codec *codec = &wm8960->codec;
755         int ret;
756         u16 reg;
757 
758         if (wm8960_codec) {
759                 dev_err(codec->dev, "Another WM8960 is registered\n");
760                 ret = -EINVAL;
761                 goto err;
762         }
763 
764         if (!pdata) {
765                 dev_warn(codec->dev, "No platform data supplied\n");
766         } else {
767                 if (pdata->dres > WM8960_DRES_MAX) {
768                         dev_err(codec->dev, "Invalid DRES: %d\n", pdata->dres);
769                         pdata->dres = 0;
770                 }
771         }
772 
773         mutex_init(&codec->mutex);
774         INIT_LIST_HEAD(&codec->dapm_widgets);
775         INIT_LIST_HEAD(&codec->dapm_paths);
776 
777         codec->private_data = wm8960;
778         codec->name = "WM8960";
779         codec->owner = THIS_MODULE;
780         codec->bias_level = SND_SOC_BIAS_OFF;
781         codec->set_bias_level = wm8960_set_bias_level;
782         codec->dai = &wm8960_dai;
783         codec->num_dai = 1;
784         codec->reg_cache_size = WM8960_CACHEREGNUM;
785         codec->reg_cache = &wm8960->reg_cache;
786 
787         memcpy(codec->reg_cache, wm8960_reg, sizeof(wm8960_reg));
788 
789         ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
790         if (ret < 0) {
791                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
792                 goto err;
793         }
794 
795         ret = wm8960_reset(codec);
796         if (ret < 0) {
797                 dev_err(codec->dev, "Failed to issue reset\n");
798                 goto err;
799         }
800 
801         wm8960_dai.dev = codec->dev;
802 
803         wm8960_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
804 
805         /* Latch the update bits */
806         reg = snd_soc_read(codec, WM8960_LINVOL);
807         snd_soc_write(codec, WM8960_LINVOL, reg | 0x100);
808         reg = snd_soc_read(codec, WM8960_RINVOL);
809         snd_soc_write(codec, WM8960_RINVOL, reg | 0x100);
810         reg = snd_soc_read(codec, WM8960_LADC);
811         snd_soc_write(codec, WM8960_LADC, reg | 0x100);
812         reg = snd_soc_read(codec, WM8960_RADC);
813         snd_soc_write(codec, WM8960_RADC, reg | 0x100);
814         reg = snd_soc_read(codec, WM8960_LDAC);
815         snd_soc_write(codec, WM8960_LDAC, reg | 0x100);
816         reg = snd_soc_read(codec, WM8960_RDAC);
817         snd_soc_write(codec, WM8960_RDAC, reg | 0x100);
818         reg = snd_soc_read(codec, WM8960_LOUT1);
819         snd_soc_write(codec, WM8960_LOUT1, reg | 0x100);
820         reg = snd_soc_read(codec, WM8960_ROUT1);
821         snd_soc_write(codec, WM8960_ROUT1, reg | 0x100);
822         reg = snd_soc_read(codec, WM8960_LOUT2);
823         snd_soc_write(codec, WM8960_LOUT2, reg | 0x100);
824         reg = snd_soc_read(codec, WM8960_ROUT2);
825         snd_soc_write(codec, WM8960_ROUT2, reg | 0x100);
826 
827         wm8960_codec = codec;
828 
829         ret = snd_soc_register_codec(codec);
830         if (ret != 0) {
831                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
832                 goto err;
833         }
834 
835         ret = snd_soc_register_dai(&wm8960_dai);
836         if (ret != 0) {
837                 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
838                 goto err_codec;
839         }
840 
841         return 0;
842 
843 err_codec:
844         snd_soc_unregister_codec(codec);
845 err:
846         kfree(wm8960);
847         return ret;
848 }
849 
850 static void wm8960_unregister(struct wm8960_priv *wm8960)
851 {
852         wm8960_set_bias_level(&wm8960->codec, SND_SOC_BIAS_OFF);
853         snd_soc_unregister_dai(&wm8960_dai);
854         snd_soc_unregister_codec(&wm8960->codec);
855         kfree(wm8960);
856         wm8960_codec = NULL;
857 }
858 
859 static __devinit int wm8960_i2c_probe(struct i2c_client *i2c,
860                                       const struct i2c_device_id *id)
861 {
862         struct wm8960_priv *wm8960;
863         struct snd_soc_codec *codec;
864 
865         wm8960 = kzalloc(sizeof(struct wm8960_priv), GFP_KERNEL);
866         if (wm8960 == NULL)
867                 return -ENOMEM;
868 
869         codec = &wm8960->codec;
870 
871         i2c_set_clientdata(i2c, wm8960);
872         codec->control_data = i2c;
873 
874         codec->dev = &i2c->dev;
875 
876         return wm8960_register(wm8960, SND_SOC_I2C);
877 }
878 
879 static __devexit int wm8960_i2c_remove(struct i2c_client *client)
880 {
881         struct wm8960_priv *wm8960 = i2c_get_clientdata(client);
882         wm8960_unregister(wm8960);
883         return 0;
884 }
885 
886 #ifdef CONFIG_PM
887 static int wm8960_i2c_suspend(struct i2c_client *client, pm_message_t msg)
888 {
889         return snd_soc_suspend_device(&client->dev);
890 }
891 
892 static int wm8960_i2c_resume(struct i2c_client *client)
893 {
894         return snd_soc_resume_device(&client->dev);
895 }
896 #else
897 #define wm8960_i2c_suspend NULL
898 #define wm8960_i2c_resume NULL
899 #endif
900 
901 static const struct i2c_device_id wm8960_i2c_id[] = {
902         { "wm8960", 0 },
903         { }
904 };
905 MODULE_DEVICE_TABLE(i2c, wm8960_i2c_id);
906 
907 static struct i2c_driver wm8960_i2c_driver = {
908         .driver = {
909                 .name = "WM8960 I2C Codec",
910                 .owner = THIS_MODULE,
911         },
912         .probe =    wm8960_i2c_probe,
913         .remove =   __devexit_p(wm8960_i2c_remove),
914         .suspend =  wm8960_i2c_suspend,
915         .resume =   wm8960_i2c_resume,
916         .id_table = wm8960_i2c_id,
917 };
918 
919 static int __init wm8960_modinit(void)
920 {
921         int ret;
922 
923         ret = i2c_add_driver(&wm8960_i2c_driver);
924         if (ret != 0) {
925                 printk(KERN_ERR "Failed to register WM8960 I2C driver: %d\n",
926                        ret);
927         }
928 
929         return ret;
930 }
931 module_init(wm8960_modinit);
932 
933 static void __exit wm8960_exit(void)
934 {
935         i2c_del_driver(&wm8960_i2c_driver);
936 }
937 module_exit(wm8960_exit);
938 
939 
940 MODULE_DESCRIPTION("ASoC WM8960 driver");
941 MODULE_AUTHOR("Liam Girdwood");
942 MODULE_LICENSE("GPL");
943 

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