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TOMOYO Linux Cross Reference
Linux/sound/soc/codecs/wm8971.c

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  1 /*
  2  * wm8971.c  --  WM8971 ALSA SoC Audio driver
  3  *
  4  * Copyright 2005 Lab126, Inc.
  5  *
  6  * Author: Kenneth Kiraly <kiraly@lab126.com>
  7  *
  8  * Based on wm8753.c by Liam Girdwood
  9  *
 10  *  This program is free software; you can redistribute  it and/or modify it
 11  *  under  the terms of  the GNU General  Public License as published by the
 12  *  Free Software Foundation;  either version 2 of the  License, or (at your
 13  *  option) any later version.
 14  */
 15 
 16 #include <linux/module.h>
 17 #include <linux/moduleparam.h>
 18 #include <linux/init.h>
 19 #include <linux/delay.h>
 20 #include <linux/pm.h>
 21 #include <linux/i2c.h>
 22 #include <linux/regmap.h>
 23 #include <linux/slab.h>
 24 #include <sound/core.h>
 25 #include <sound/pcm.h>
 26 #include <sound/pcm_params.h>
 27 #include <sound/soc.h>
 28 #include <sound/initval.h>
 29 
 30 #include "wm8971.h"
 31 
 32 #define WM8971_REG_COUNT                43
 33 
 34 /* codec private data */
 35 struct wm8971_priv {
 36         unsigned int sysclk;
 37         struct delayed_work charge_work;
 38         struct regmap *regmap;
 39 };
 40 
 41 /*
 42  * wm8971 register cache
 43  * We can't read the WM8971 register space when we
 44  * are using 2 wire for device control, so we cache them instead.
 45  */
 46 static const struct reg_default wm8971_reg_defaults[] = {
 47         {  0, 0x0097 },
 48         {  1, 0x0097 },
 49         {  2, 0x0079 },
 50         {  3, 0x0079 },
 51         {  4, 0x0000 },
 52         {  5, 0x0008 },
 53         {  6, 0x0000 },
 54         {  7, 0x000a },
 55         {  8, 0x0000 },
 56         {  9, 0x0000 },
 57         { 10, 0x00ff },
 58         { 11, 0x00ff },
 59         { 12, 0x000f },
 60         { 13, 0x000f },
 61         { 14, 0x0000 },
 62         { 15, 0x0000 },
 63         { 16, 0x0000 },
 64         { 17, 0x007b },
 65         { 18, 0x0000 },
 66         { 19, 0x0032 },
 67         { 20, 0x0000 },
 68         { 21, 0x00c3 },
 69         { 22, 0x00c3 },
 70         { 23, 0x00c0 },
 71         { 24, 0x0000 },
 72         { 25, 0x0000 },
 73         { 26, 0x0000 },
 74         { 27, 0x0000 },
 75         { 28, 0x0000 },
 76         { 29, 0x0000 },
 77         { 30, 0x0000 },
 78         { 31, 0x0000 },
 79         { 32, 0x0000 },
 80         { 33, 0x0000 },
 81         { 34, 0x0050 },
 82         { 35, 0x0050 },
 83         { 36, 0x0050 },
 84         { 37, 0x0050 },
 85         { 38, 0x0050 },
 86         { 39, 0x0050 },
 87         { 40, 0x0079 },
 88         { 41, 0x0079 },
 89         { 42, 0x0079 },
 90 };
 91 
 92 #define wm8971_reset(c) snd_soc_write(c, WM8971_RESET, 0)
 93 
 94 /* WM8971 Controls */
 95 static const char *wm8971_bass[] = { "Linear Control", "Adaptive Boost" };
 96 static const char *wm8971_bass_filter[] = { "130Hz @ 48kHz",
 97         "200Hz @ 48kHz" };
 98 static const char *wm8971_treble[] = { "8kHz", "4kHz" };
 99 static const char *wm8971_alc_func[] = { "Off", "Right", "Left", "Stereo" };
100 static const char *wm8971_ng_type[] = { "Constant PGA Gain",
101         "Mute ADC Output" };
102 static const char *wm8971_deemp[] = { "None", "32kHz", "44.1kHz", "48kHz" };
103 static const char *wm8971_mono_mux[] = {"Stereo", "Mono (Left)",
104         "Mono (Right)", "Digital Mono"};
105 static const char *wm8971_dac_phase[] = { "Non Inverted", "Inverted" };
106 static const char *wm8971_lline_mux[] = {"Line", "NC", "NC", "PGA",
107         "Differential"};
108 static const char *wm8971_rline_mux[] = {"Line", "Mic", "NC", "PGA",
109         "Differential"};
110 static const char *wm8971_lpga_sel[] = {"Line", "NC", "NC", "Differential"};
111 static const char *wm8971_rpga_sel[] = {"Line", "Mic", "NC", "Differential"};
112 static const char *wm8971_adcpol[] = {"Normal", "L Invert", "R Invert",
113         "L + R Invert"};
114 
115 static const struct soc_enum wm8971_enum[] = {
116         SOC_ENUM_SINGLE(WM8971_BASS, 7, 2, wm8971_bass),        /* 0 */
117         SOC_ENUM_SINGLE(WM8971_BASS, 6, 2, wm8971_bass_filter),
118         SOC_ENUM_SINGLE(WM8971_TREBLE, 6, 2, wm8971_treble),
119         SOC_ENUM_SINGLE(WM8971_ALC1, 7, 4, wm8971_alc_func),
120         SOC_ENUM_SINGLE(WM8971_NGATE, 1, 2, wm8971_ng_type),    /* 4 */
121         SOC_ENUM_SINGLE(WM8971_ADCDAC, 1, 4, wm8971_deemp),
122         SOC_ENUM_SINGLE(WM8971_ADCTL1, 4, 4, wm8971_mono_mux),
123         SOC_ENUM_SINGLE(WM8971_ADCTL1, 1, 2, wm8971_dac_phase),
124         SOC_ENUM_SINGLE(WM8971_LOUTM1, 0, 5, wm8971_lline_mux), /* 8 */
125         SOC_ENUM_SINGLE(WM8971_ROUTM1, 0, 5, wm8971_rline_mux),
126         SOC_ENUM_SINGLE(WM8971_LADCIN, 6, 4, wm8971_lpga_sel),
127         SOC_ENUM_SINGLE(WM8971_RADCIN, 6, 4, wm8971_rpga_sel),
128         SOC_ENUM_SINGLE(WM8971_ADCDAC, 5, 4, wm8971_adcpol),    /* 12 */
129         SOC_ENUM_SINGLE(WM8971_ADCIN, 6, 4, wm8971_mono_mux),
130 };
131 
132 static const struct snd_kcontrol_new wm8971_snd_controls[] = {
133         SOC_DOUBLE_R("Capture Volume", WM8971_LINVOL, WM8971_RINVOL, 0, 63, 0),
134         SOC_DOUBLE_R("Capture ZC Switch", WM8971_LINVOL, WM8971_RINVOL,
135                      6, 1, 0),
136         SOC_DOUBLE_R("Capture Switch", WM8971_LINVOL, WM8971_RINVOL, 7, 1, 1),
137 
138         SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8971_LOUT1V,
139                 WM8971_ROUT1V, 7, 1, 0),
140         SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8971_LOUT2V,
141                 WM8971_ROUT2V, 7, 1, 0),
142         SOC_SINGLE("Mono Playback ZC Switch", WM8971_MOUTV, 7, 1, 0),
143 
144         SOC_DOUBLE_R("PCM Volume", WM8971_LDAC, WM8971_RDAC, 0, 255, 0),
145 
146         SOC_DOUBLE_R("Bypass Left Playback Volume", WM8971_LOUTM1,
147                 WM8971_LOUTM2, 4, 7, 1),
148         SOC_DOUBLE_R("Bypass Right Playback Volume", WM8971_ROUTM1,
149                 WM8971_ROUTM2, 4, 7, 1),
150         SOC_DOUBLE_R("Bypass Mono Playback Volume", WM8971_MOUTM1,
151                 WM8971_MOUTM2, 4, 7, 1),
152 
153         SOC_DOUBLE_R("Headphone Playback Volume", WM8971_LOUT1V,
154                 WM8971_ROUT1V, 0, 127, 0),
155         SOC_DOUBLE_R("Speaker Playback Volume", WM8971_LOUT2V,
156                 WM8971_ROUT2V, 0, 127, 0),
157 
158         SOC_ENUM("Bass Boost", wm8971_enum[0]),
159         SOC_ENUM("Bass Filter", wm8971_enum[1]),
160         SOC_SINGLE("Bass Volume", WM8971_BASS, 0, 7, 1),
161 
162         SOC_SINGLE("Treble Volume", WM8971_TREBLE, 0, 7, 0),
163         SOC_ENUM("Treble Cut-off", wm8971_enum[2]),
164 
165         SOC_SINGLE("Capture Filter Switch", WM8971_ADCDAC, 0, 1, 1),
166 
167         SOC_SINGLE("ALC Target Volume", WM8971_ALC1, 0, 7, 0),
168         SOC_SINGLE("ALC Max Volume", WM8971_ALC1, 4, 7, 0),
169 
170         SOC_SINGLE("ALC Capture Target Volume", WM8971_ALC1, 0, 7, 0),
171         SOC_SINGLE("ALC Capture Max Volume", WM8971_ALC1, 4, 7, 0),
172         SOC_ENUM("ALC Capture Function", wm8971_enum[3]),
173         SOC_SINGLE("ALC Capture ZC Switch", WM8971_ALC2, 7, 1, 0),
174         SOC_SINGLE("ALC Capture Hold Time", WM8971_ALC2, 0, 15, 0),
175         SOC_SINGLE("ALC Capture Decay Time", WM8971_ALC3, 4, 15, 0),
176         SOC_SINGLE("ALC Capture Attack Time", WM8971_ALC3, 0, 15, 0),
177         SOC_SINGLE("ALC Capture NG Threshold", WM8971_NGATE, 3, 31, 0),
178         SOC_ENUM("ALC Capture NG Type", wm8971_enum[4]),
179         SOC_SINGLE("ALC Capture NG Switch", WM8971_NGATE, 0, 1, 0),
180 
181         SOC_SINGLE("Capture 6dB Attenuate", WM8971_ADCDAC, 8, 1, 0),
182         SOC_SINGLE("Playback 6dB Attenuate", WM8971_ADCDAC, 7, 1, 0),
183 
184         SOC_ENUM("Playback De-emphasis", wm8971_enum[5]),
185         SOC_ENUM("Playback Function", wm8971_enum[6]),
186         SOC_ENUM("Playback Phase", wm8971_enum[7]),
187 
188         SOC_DOUBLE_R("Mic Boost", WM8971_LADCIN, WM8971_RADCIN, 4, 3, 0),
189 };
190 
191 /*
192  * DAPM Controls
193  */
194 
195 /* Left Mixer */
196 static const struct snd_kcontrol_new wm8971_left_mixer_controls[] = {
197 SOC_DAPM_SINGLE("Playback Switch", WM8971_LOUTM1, 8, 1, 0),
198 SOC_DAPM_SINGLE("Left Bypass Switch", WM8971_LOUTM1, 7, 1, 0),
199 SOC_DAPM_SINGLE("Right Playback Switch", WM8971_LOUTM2, 8, 1, 0),
200 SOC_DAPM_SINGLE("Right Bypass Switch", WM8971_LOUTM2, 7, 1, 0),
201 };
202 
203 /* Right Mixer */
204 static const struct snd_kcontrol_new wm8971_right_mixer_controls[] = {
205 SOC_DAPM_SINGLE("Left Playback Switch", WM8971_ROUTM1, 8, 1, 0),
206 SOC_DAPM_SINGLE("Left Bypass Switch", WM8971_ROUTM1, 7, 1, 0),
207 SOC_DAPM_SINGLE("Playback Switch", WM8971_ROUTM2, 8, 1, 0),
208 SOC_DAPM_SINGLE("Right Bypass Switch", WM8971_ROUTM2, 7, 1, 0),
209 };
210 
211 /* Mono Mixer */
212 static const struct snd_kcontrol_new wm8971_mono_mixer_controls[] = {
213 SOC_DAPM_SINGLE("Left Playback Switch", WM8971_MOUTM1, 8, 1, 0),
214 SOC_DAPM_SINGLE("Left Bypass Switch", WM8971_MOUTM1, 7, 1, 0),
215 SOC_DAPM_SINGLE("Right Playback Switch", WM8971_MOUTM2, 8, 1, 0),
216 SOC_DAPM_SINGLE("Right Bypass Switch", WM8971_MOUTM2, 7, 1, 0),
217 };
218 
219 /* Left Line Mux */
220 static const struct snd_kcontrol_new wm8971_left_line_controls =
221 SOC_DAPM_ENUM("Route", wm8971_enum[8]);
222 
223 /* Right Line Mux */
224 static const struct snd_kcontrol_new wm8971_right_line_controls =
225 SOC_DAPM_ENUM("Route", wm8971_enum[9]);
226 
227 /* Left PGA Mux */
228 static const struct snd_kcontrol_new wm8971_left_pga_controls =
229 SOC_DAPM_ENUM("Route", wm8971_enum[10]);
230 
231 /* Right PGA Mux */
232 static const struct snd_kcontrol_new wm8971_right_pga_controls =
233 SOC_DAPM_ENUM("Route", wm8971_enum[11]);
234 
235 /* Mono ADC Mux */
236 static const struct snd_kcontrol_new wm8971_monomux_controls =
237 SOC_DAPM_ENUM("Route", wm8971_enum[13]);
238 
239 static const struct snd_soc_dapm_widget wm8971_dapm_widgets[] = {
240         SND_SOC_DAPM_MIXER("Left Mixer", SND_SOC_NOPM, 0, 0,
241                 &wm8971_left_mixer_controls[0],
242                 ARRAY_SIZE(wm8971_left_mixer_controls)),
243         SND_SOC_DAPM_MIXER("Right Mixer", SND_SOC_NOPM, 0, 0,
244                 &wm8971_right_mixer_controls[0],
245                 ARRAY_SIZE(wm8971_right_mixer_controls)),
246         SND_SOC_DAPM_MIXER("Mono Mixer", WM8971_PWR2, 2, 0,
247                 &wm8971_mono_mixer_controls[0],
248                 ARRAY_SIZE(wm8971_mono_mixer_controls)),
249 
250         SND_SOC_DAPM_PGA("Right Out 2", WM8971_PWR2, 3, 0, NULL, 0),
251         SND_SOC_DAPM_PGA("Left Out 2", WM8971_PWR2, 4, 0, NULL, 0),
252         SND_SOC_DAPM_PGA("Right Out 1", WM8971_PWR2, 5, 0, NULL, 0),
253         SND_SOC_DAPM_PGA("Left Out 1", WM8971_PWR2, 6, 0, NULL, 0),
254         SND_SOC_DAPM_DAC("Right DAC", "Right Playback", WM8971_PWR2, 7, 0),
255         SND_SOC_DAPM_DAC("Left DAC", "Left Playback", WM8971_PWR2, 8, 0),
256         SND_SOC_DAPM_PGA("Mono Out 1", WM8971_PWR2, 2, 0, NULL, 0),
257 
258         SND_SOC_DAPM_SUPPLY("Mic Bias", WM8971_PWR1, 1, 0, NULL, 0),
259         SND_SOC_DAPM_ADC("Right ADC", "Right Capture", WM8971_PWR1, 2, 0),
260         SND_SOC_DAPM_ADC("Left ADC", "Left Capture", WM8971_PWR1, 3, 0),
261 
262         SND_SOC_DAPM_MUX("Left PGA Mux", WM8971_PWR1, 5, 0,
263                 &wm8971_left_pga_controls),
264         SND_SOC_DAPM_MUX("Right PGA Mux", WM8971_PWR1, 4, 0,
265                 &wm8971_right_pga_controls),
266         SND_SOC_DAPM_MUX("Left Line Mux", SND_SOC_NOPM, 0, 0,
267                 &wm8971_left_line_controls),
268         SND_SOC_DAPM_MUX("Right Line Mux", SND_SOC_NOPM, 0, 0,
269                 &wm8971_right_line_controls),
270 
271         SND_SOC_DAPM_MUX("Left ADC Mux", SND_SOC_NOPM, 0, 0,
272                 &wm8971_monomux_controls),
273         SND_SOC_DAPM_MUX("Right ADC Mux", SND_SOC_NOPM, 0, 0,
274                 &wm8971_monomux_controls),
275 
276         SND_SOC_DAPM_OUTPUT("LOUT1"),
277         SND_SOC_DAPM_OUTPUT("ROUT1"),
278         SND_SOC_DAPM_OUTPUT("LOUT2"),
279         SND_SOC_DAPM_OUTPUT("ROUT2"),
280         SND_SOC_DAPM_OUTPUT("MONO"),
281 
282         SND_SOC_DAPM_INPUT("LINPUT1"),
283         SND_SOC_DAPM_INPUT("RINPUT1"),
284         SND_SOC_DAPM_INPUT("MIC"),
285 };
286 
287 static const struct snd_soc_dapm_route wm8971_dapm_routes[] = {
288         /* left mixer */
289         {"Left Mixer", "Playback Switch", "Left DAC"},
290         {"Left Mixer", "Left Bypass Switch", "Left Line Mux"},
291         {"Left Mixer", "Right Playback Switch", "Right DAC"},
292         {"Left Mixer", "Right Bypass Switch", "Right Line Mux"},
293 
294         /* right mixer */
295         {"Right Mixer", "Left Playback Switch", "Left DAC"},
296         {"Right Mixer", "Left Bypass Switch", "Left Line Mux"},
297         {"Right Mixer", "Playback Switch", "Right DAC"},
298         {"Right Mixer", "Right Bypass Switch", "Right Line Mux"},
299 
300         /* left out 1 */
301         {"Left Out 1", NULL, "Left Mixer"},
302         {"LOUT1", NULL, "Left Out 1"},
303 
304         /* left out 2 */
305         {"Left Out 2", NULL, "Left Mixer"},
306         {"LOUT2", NULL, "Left Out 2"},
307 
308         /* right out 1 */
309         {"Right Out 1", NULL, "Right Mixer"},
310         {"ROUT1", NULL, "Right Out 1"},
311 
312         /* right out 2 */
313         {"Right Out 2", NULL, "Right Mixer"},
314         {"ROUT2", NULL, "Right Out 2"},
315 
316         /* mono mixer */
317         {"Mono Mixer", "Left Playback Switch", "Left DAC"},
318         {"Mono Mixer", "Left Bypass Switch", "Left Line Mux"},
319         {"Mono Mixer", "Right Playback Switch", "Right DAC"},
320         {"Mono Mixer", "Right Bypass Switch", "Right Line Mux"},
321 
322         /* mono out */
323         {"Mono Out", NULL, "Mono Mixer"},
324         {"MONO1", NULL, "Mono Out"},
325 
326         /* Left Line Mux */
327         {"Left Line Mux", "Line", "LINPUT1"},
328         {"Left Line Mux", "PGA", "Left PGA Mux"},
329         {"Left Line Mux", "Differential", "Differential Mux"},
330 
331         /* Right Line Mux */
332         {"Right Line Mux", "Line", "RINPUT1"},
333         {"Right Line Mux", "Mic", "MIC"},
334         {"Right Line Mux", "PGA", "Right PGA Mux"},
335         {"Right Line Mux", "Differential", "Differential Mux"},
336 
337         /* Left PGA Mux */
338         {"Left PGA Mux", "Line", "LINPUT1"},
339         {"Left PGA Mux", "Differential", "Differential Mux"},
340 
341         /* Right PGA Mux */
342         {"Right PGA Mux", "Line", "RINPUT1"},
343         {"Right PGA Mux", "Differential", "Differential Mux"},
344 
345         /* Differential Mux */
346         {"Differential Mux", "Line", "LINPUT1"},
347         {"Differential Mux", "Line", "RINPUT1"},
348 
349         /* Left ADC Mux */
350         {"Left ADC Mux", "Stereo", "Left PGA Mux"},
351         {"Left ADC Mux", "Mono (Left)", "Left PGA Mux"},
352         {"Left ADC Mux", "Digital Mono", "Left PGA Mux"},
353 
354         /* Right ADC Mux */
355         {"Right ADC Mux", "Stereo", "Right PGA Mux"},
356         {"Right ADC Mux", "Mono (Right)", "Right PGA Mux"},
357         {"Right ADC Mux", "Digital Mono", "Right PGA Mux"},
358 
359         /* ADC */
360         {"Left ADC", NULL, "Left ADC Mux"},
361         {"Right ADC", NULL, "Right ADC Mux"},
362 };
363 
364 struct _coeff_div {
365         u32 mclk;
366         u32 rate;
367         u16 fs;
368         u8 sr:5;
369         u8 usb:1;
370 };
371 
372 /* codec hifi mclk clock divider coefficients */
373 static const struct _coeff_div coeff_div[] = {
374         /* 8k */
375         {12288000, 8000, 1536, 0x6, 0x0},
376         {11289600, 8000, 1408, 0x16, 0x0},
377         {18432000, 8000, 2304, 0x7, 0x0},
378         {16934400, 8000, 2112, 0x17, 0x0},
379         {12000000, 8000, 1500, 0x6, 0x1},
380 
381         /* 11.025k */
382         {11289600, 11025, 1024, 0x18, 0x0},
383         {16934400, 11025, 1536, 0x19, 0x0},
384         {12000000, 11025, 1088, 0x19, 0x1},
385 
386         /* 16k */
387         {12288000, 16000, 768, 0xa, 0x0},
388         {18432000, 16000, 1152, 0xb, 0x0},
389         {12000000, 16000, 750, 0xa, 0x1},
390 
391         /* 22.05k */
392         {11289600, 22050, 512, 0x1a, 0x0},
393         {16934400, 22050, 768, 0x1b, 0x0},
394         {12000000, 22050, 544, 0x1b, 0x1},
395 
396         /* 32k */
397         {12288000, 32000, 384, 0xc, 0x0},
398         {18432000, 32000, 576, 0xd, 0x0},
399         {12000000, 32000, 375, 0xa, 0x1},
400 
401         /* 44.1k */
402         {11289600, 44100, 256, 0x10, 0x0},
403         {16934400, 44100, 384, 0x11, 0x0},
404         {12000000, 44100, 272, 0x11, 0x1},
405 
406         /* 48k */
407         {12288000, 48000, 256, 0x0, 0x0},
408         {18432000, 48000, 384, 0x1, 0x0},
409         {12000000, 48000, 250, 0x0, 0x1},
410 
411         /* 88.2k */
412         {11289600, 88200, 128, 0x1e, 0x0},
413         {16934400, 88200, 192, 0x1f, 0x0},
414         {12000000, 88200, 136, 0x1f, 0x1},
415 
416         /* 96k */
417         {12288000, 96000, 128, 0xe, 0x0},
418         {18432000, 96000, 192, 0xf, 0x0},
419         {12000000, 96000, 125, 0xe, 0x1},
420 };
421 
422 static int get_coeff(int mclk, int rate)
423 {
424         int i;
425 
426         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
427                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
428                         return i;
429         }
430         return -EINVAL;
431 }
432 
433 static int wm8971_set_dai_sysclk(struct snd_soc_dai *codec_dai,
434                 int clk_id, unsigned int freq, int dir)
435 {
436         struct snd_soc_codec *codec = codec_dai->codec;
437         struct wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
438 
439         switch (freq) {
440         case 11289600:
441         case 12000000:
442         case 12288000:
443         case 16934400:
444         case 18432000:
445                 wm8971->sysclk = freq;
446                 return 0;
447         }
448         return -EINVAL;
449 }
450 
451 static int wm8971_set_dai_fmt(struct snd_soc_dai *codec_dai,
452                 unsigned int fmt)
453 {
454         struct snd_soc_codec *codec = codec_dai->codec;
455         u16 iface = 0;
456 
457         /* set master/slave audio interface */
458         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
459         case SND_SOC_DAIFMT_CBM_CFM:
460                 iface = 0x0040;
461                 break;
462         case SND_SOC_DAIFMT_CBS_CFS:
463                 break;
464         default:
465                 return -EINVAL;
466         }
467 
468         /* interface format */
469         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
470         case SND_SOC_DAIFMT_I2S:
471                 iface |= 0x0002;
472                 break;
473         case SND_SOC_DAIFMT_RIGHT_J:
474                 break;
475         case SND_SOC_DAIFMT_LEFT_J:
476                 iface |= 0x0001;
477                 break;
478         case SND_SOC_DAIFMT_DSP_A:
479                 iface |= 0x0003;
480                 break;
481         case SND_SOC_DAIFMT_DSP_B:
482                 iface |= 0x0013;
483                 break;
484         default:
485                 return -EINVAL;
486         }
487 
488         /* clock inversion */
489         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
490         case SND_SOC_DAIFMT_NB_NF:
491                 break;
492         case SND_SOC_DAIFMT_IB_IF:
493                 iface |= 0x0090;
494                 break;
495         case SND_SOC_DAIFMT_IB_NF:
496                 iface |= 0x0080;
497                 break;
498         case SND_SOC_DAIFMT_NB_IF:
499                 iface |= 0x0010;
500                 break;
501         default:
502                 return -EINVAL;
503         }
504 
505         snd_soc_write(codec, WM8971_IFACE, iface);
506         return 0;
507 }
508 
509 static int wm8971_pcm_hw_params(struct snd_pcm_substream *substream,
510         struct snd_pcm_hw_params *params,
511         struct snd_soc_dai *dai)
512 {
513         struct snd_soc_codec *codec = dai->codec;
514         struct wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
515         u16 iface = snd_soc_read(codec, WM8971_IFACE) & 0x1f3;
516         u16 srate = snd_soc_read(codec, WM8971_SRATE) & 0x1c0;
517         int coeff = get_coeff(wm8971->sysclk, params_rate(params));
518 
519         /* bit size */
520         switch (params_width(params)) {
521         case 16:
522                 break;
523         case 20:
524                 iface |= 0x0004;
525                 break;
526         case 24:
527                 iface |= 0x0008;
528                 break;
529         case 32:
530                 iface |= 0x000c;
531                 break;
532         }
533 
534         /* set iface & srate */
535         snd_soc_write(codec, WM8971_IFACE, iface);
536         if (coeff >= 0)
537                 snd_soc_write(codec, WM8971_SRATE, srate |
538                         (coeff_div[coeff].sr << 1) | coeff_div[coeff].usb);
539 
540         return 0;
541 }
542 
543 static int wm8971_mute(struct snd_soc_dai *dai, int mute)
544 {
545         struct snd_soc_codec *codec = dai->codec;
546         u16 mute_reg = snd_soc_read(codec, WM8971_ADCDAC) & 0xfff7;
547 
548         if (mute)
549                 snd_soc_write(codec, WM8971_ADCDAC, mute_reg | 0x8);
550         else
551                 snd_soc_write(codec, WM8971_ADCDAC, mute_reg);
552         return 0;
553 }
554 
555 static void wm8971_charge_work(struct work_struct *work)
556 {
557         struct wm8971_priv *wm8971 =
558                 container_of(work, struct wm8971_priv, charge_work.work);
559 
560         /* Set to 500k */
561         regmap_update_bits(wm8971->regmap, WM8971_PWR1, 0x0180, 0x0100);
562 }
563 
564 static int wm8971_set_bias_level(struct snd_soc_codec *codec,
565         enum snd_soc_bias_level level)
566 {
567         struct wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
568         u16 pwr_reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
569 
570         switch (level) {
571         case SND_SOC_BIAS_ON:
572                 /* set vmid to 50k and unmute dac */
573                 snd_soc_write(codec, WM8971_PWR1, pwr_reg | 0x00c1);
574                 break;
575         case SND_SOC_BIAS_PREPARE:
576                 /* Wait until fully charged */
577                 flush_delayed_work(&wm8971->charge_work);
578                 break;
579         case SND_SOC_BIAS_STANDBY:
580                 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
581                         snd_soc_cache_sync(codec);
582                         /* charge output caps - set vmid to 5k for quick power up */
583                         snd_soc_write(codec, WM8971_PWR1, pwr_reg | 0x01c0);
584                         queue_delayed_work(system_power_efficient_wq,
585                                 &wm8971->charge_work, msecs_to_jiffies(1000));
586                 } else {
587                         /* mute dac and set vmid to 500k, enable VREF */
588                         snd_soc_write(codec, WM8971_PWR1, pwr_reg | 0x0140);
589                 }
590 
591                 break;
592         case SND_SOC_BIAS_OFF:
593                 cancel_delayed_work_sync(&wm8971->charge_work);
594                 snd_soc_write(codec, WM8971_PWR1, 0x0001);
595                 break;
596         }
597         return 0;
598 }
599 
600 #define WM8971_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
601                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
602                 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
603 
604 #define WM8971_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
605         SNDRV_PCM_FMTBIT_S24_LE)
606 
607 static const struct snd_soc_dai_ops wm8971_dai_ops = {
608         .hw_params      = wm8971_pcm_hw_params,
609         .digital_mute   = wm8971_mute,
610         .set_fmt        = wm8971_set_dai_fmt,
611         .set_sysclk     = wm8971_set_dai_sysclk,
612 };
613 
614 static struct snd_soc_dai_driver wm8971_dai = {
615         .name = "wm8971-hifi",
616         .playback = {
617                 .stream_name = "Playback",
618                 .channels_min = 1,
619                 .channels_max = 2,
620                 .rates = WM8971_RATES,
621                 .formats = WM8971_FORMATS,},
622         .capture = {
623                 .stream_name = "Capture",
624                 .channels_min = 1,
625                 .channels_max = 2,
626                 .rates = WM8971_RATES,
627                 .formats = WM8971_FORMATS,},
628         .ops = &wm8971_dai_ops,
629 };
630 
631 static int wm8971_probe(struct snd_soc_codec *codec)
632 {
633         struct wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
634 
635         INIT_DELAYED_WORK(&wm8971->charge_work, wm8971_charge_work);
636 
637         wm8971_reset(codec);
638 
639         /* set the update bits */
640         snd_soc_update_bits(codec, WM8971_LDAC, 0x0100, 0x0100);
641         snd_soc_update_bits(codec, WM8971_RDAC, 0x0100, 0x0100);
642         snd_soc_update_bits(codec, WM8971_LOUT1V, 0x0100, 0x0100);
643         snd_soc_update_bits(codec, WM8971_ROUT1V, 0x0100, 0x0100);
644         snd_soc_update_bits(codec, WM8971_LOUT2V, 0x0100, 0x0100);
645         snd_soc_update_bits(codec, WM8971_ROUT2V, 0x0100, 0x0100);
646         snd_soc_update_bits(codec, WM8971_LINVOL, 0x0100, 0x0100);
647         snd_soc_update_bits(codec, WM8971_RINVOL, 0x0100, 0x0100);
648 
649         return 0;
650 }
651 
652 static const struct snd_soc_codec_driver soc_codec_dev_wm8971 = {
653         .probe =        wm8971_probe,
654         .set_bias_level = wm8971_set_bias_level,
655         .suspend_bias_off = true,
656 
657         .component_driver = {
658                 .controls               = wm8971_snd_controls,
659                 .num_controls           = ARRAY_SIZE(wm8971_snd_controls),
660                 .dapm_widgets           = wm8971_dapm_widgets,
661                 .num_dapm_widgets       = ARRAY_SIZE(wm8971_dapm_widgets),
662                 .dapm_routes            = wm8971_dapm_routes,
663                 .num_dapm_routes        = ARRAY_SIZE(wm8971_dapm_routes),
664         },
665 };
666 
667 static const struct regmap_config wm8971_regmap = {
668         .reg_bits = 7,
669         .val_bits = 9,
670         .max_register = WM8971_MOUTV,
671 
672         .reg_defaults = wm8971_reg_defaults,
673         .num_reg_defaults = ARRAY_SIZE(wm8971_reg_defaults),
674         .cache_type = REGCACHE_RBTREE,
675 };
676 
677 static int wm8971_i2c_probe(struct i2c_client *i2c,
678                             const struct i2c_device_id *id)
679 {
680         struct wm8971_priv *wm8971;
681         int ret;
682 
683         wm8971 = devm_kzalloc(&i2c->dev, sizeof(struct wm8971_priv),
684                               GFP_KERNEL);
685         if (wm8971 == NULL)
686                 return -ENOMEM;
687 
688         wm8971->regmap = devm_regmap_init_i2c(i2c, &wm8971_regmap);
689         if (IS_ERR(wm8971->regmap))
690                 return PTR_ERR(wm8971->regmap);
691 
692         i2c_set_clientdata(i2c, wm8971);
693 
694         ret = snd_soc_register_codec(&i2c->dev,
695                         &soc_codec_dev_wm8971, &wm8971_dai, 1);
696 
697         return ret;
698 }
699 
700 static int wm8971_i2c_remove(struct i2c_client *client)
701 {
702         snd_soc_unregister_codec(&client->dev);
703         return 0;
704 }
705 
706 static const struct i2c_device_id wm8971_i2c_id[] = {
707         { "wm8971", 0 },
708         { }
709 };
710 MODULE_DEVICE_TABLE(i2c, wm8971_i2c_id);
711 
712 static struct i2c_driver wm8971_i2c_driver = {
713         .driver = {
714                 .name = "wm8971",
715         },
716         .probe =    wm8971_i2c_probe,
717         .remove =   wm8971_i2c_remove,
718         .id_table = wm8971_i2c_id,
719 };
720 
721 module_i2c_driver(wm8971_i2c_driver);
722 
723 MODULE_DESCRIPTION("ASoC WM8971 driver");
724 MODULE_AUTHOR("Lab126");
725 MODULE_LICENSE("GPL");
726 

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