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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 <[email protected]>
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/slab.h>
23 #include <sound/core.h>
24 #include <sound/pcm.h>
25 #include <sound/pcm_params.h>
26 #include <sound/soc.h>
27 #include <sound/initval.h>
28 
29 #include "wm8971.h"
30 
31 #define WM8971_REG_COUNT 43
32 
33 static struct workqueue_struct *wm8971_workq = NULL;
34 
35 /* codec private data */
36 struct wm8971_priv {
37  enum snd_soc_control_type control_type;
38  unsigned int sysclk;
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 u16 wm8971_reg[] = {
47  0x0097, 0x0097, 0x0079, 0x0079, /* 0 */
48  0x0000, 0x0008, 0x0000, 0x000a, /* 4 */
49  0x0000, 0x0000, 0x00ff, 0x00ff, /* 8 */
50  0x000f, 0x000f, 0x0000, 0x0000, /* 12 */
51  0x0000, 0x007b, 0x0000, 0x0032, /* 16 */
52  0x0000, 0x00c3, 0x00c3, 0x00c0, /* 20 */
53  0x0000, 0x0000, 0x0000, 0x0000, /* 24 */
54  0x0000, 0x0000, 0x0000, 0x0000, /* 28 */
55  0x0000, 0x0000, 0x0050, 0x0050, /* 32 */
56  0x0050, 0x0050, 0x0050, 0x0050, /* 36 */
57  0x0079, 0x0079, 0x0079, /* 40 */
58 };
59 
60 #define wm8971_reset(c) snd_soc_write(c, WM8971_RESET, 0)
61 
62 /* WM8971 Controls */
63 static const char *wm8971_bass[] = { "Linear Control", "Adaptive Boost" };
64 static const char *wm8971_bass_filter[] = { "130Hz @ 48kHz",
65  "200Hz @ 48kHz" };
66 static const char *wm8971_treble[] = { "8kHz", "4kHz" };
67 static const char *wm8971_alc_func[] = { "Off", "Right", "Left", "Stereo" };
68 static const char *wm8971_ng_type[] = { "Constant PGA Gain",
69  "Mute ADC Output" };
70 static const char *wm8971_deemp[] = { "None", "32kHz", "44.1kHz", "48kHz" };
71 static const char *wm8971_mono_mux[] = {"Stereo", "Mono (Left)",
72  "Mono (Right)", "Digital Mono"};
73 static const char *wm8971_dac_phase[] = { "Non Inverted", "Inverted" };
74 static const char *wm8971_lline_mux[] = {"Line", "NC", "NC", "PGA",
75  "Differential"};
76 static const char *wm8971_rline_mux[] = {"Line", "Mic", "NC", "PGA",
77  "Differential"};
78 static const char *wm8971_lpga_sel[] = {"Line", "NC", "NC", "Differential"};
79 static const char *wm8971_rpga_sel[] = {"Line", "Mic", "NC", "Differential"};
80 static const char *wm8971_adcpol[] = {"Normal", "L Invert", "R Invert",
81  "L + R Invert"};
82 
83 static const struct soc_enum wm8971_enum[] = {
84  SOC_ENUM_SINGLE(WM8971_BASS, 7, 2, wm8971_bass), /* 0 */
85  SOC_ENUM_SINGLE(WM8971_BASS, 6, 2, wm8971_bass_filter),
86  SOC_ENUM_SINGLE(WM8971_TREBLE, 6, 2, wm8971_treble),
87  SOC_ENUM_SINGLE(WM8971_ALC1, 7, 4, wm8971_alc_func),
88  SOC_ENUM_SINGLE(WM8971_NGATE, 1, 2, wm8971_ng_type), /* 4 */
89  SOC_ENUM_SINGLE(WM8971_ADCDAC, 1, 4, wm8971_deemp),
90  SOC_ENUM_SINGLE(WM8971_ADCTL1, 4, 4, wm8971_mono_mux),
91  SOC_ENUM_SINGLE(WM8971_ADCTL1, 1, 2, wm8971_dac_phase),
92  SOC_ENUM_SINGLE(WM8971_LOUTM1, 0, 5, wm8971_lline_mux), /* 8 */
93  SOC_ENUM_SINGLE(WM8971_ROUTM1, 0, 5, wm8971_rline_mux),
94  SOC_ENUM_SINGLE(WM8971_LADCIN, 6, 4, wm8971_lpga_sel),
95  SOC_ENUM_SINGLE(WM8971_RADCIN, 6, 4, wm8971_rpga_sel),
96  SOC_ENUM_SINGLE(WM8971_ADCDAC, 5, 4, wm8971_adcpol), /* 12 */
97  SOC_ENUM_SINGLE(WM8971_ADCIN, 6, 4, wm8971_mono_mux),
98 };
99 
100 static const struct snd_kcontrol_new wm8971_snd_controls[] = {
101  SOC_DOUBLE_R("Capture Volume", WM8971_LINVOL, WM8971_RINVOL, 0, 63, 0),
102  SOC_DOUBLE_R("Capture ZC Switch", WM8971_LINVOL, WM8971_RINVOL,
103  6, 1, 0),
104  SOC_DOUBLE_R("Capture Switch", WM8971_LINVOL, WM8971_RINVOL, 7, 1, 1),
105 
106  SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8971_LOUT1V,
107  WM8971_ROUT1V, 7, 1, 0),
108  SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8971_LOUT2V,
109  WM8971_ROUT2V, 7, 1, 0),
110  SOC_SINGLE("Mono Playback ZC Switch", WM8971_MOUTV, 7, 1, 0),
111 
112  SOC_DOUBLE_R("PCM Volume", WM8971_LDAC, WM8971_RDAC, 0, 255, 0),
113 
114  SOC_DOUBLE_R("Bypass Left Playback Volume", WM8971_LOUTM1,
115  WM8971_LOUTM2, 4, 7, 1),
116  SOC_DOUBLE_R("Bypass Right Playback Volume", WM8971_ROUTM1,
117  WM8971_ROUTM2, 4, 7, 1),
118  SOC_DOUBLE_R("Bypass Mono Playback Volume", WM8971_MOUTM1,
119  WM8971_MOUTM2, 4, 7, 1),
120 
121  SOC_DOUBLE_R("Headphone Playback Volume", WM8971_LOUT1V,
122  WM8971_ROUT1V, 0, 127, 0),
123  SOC_DOUBLE_R("Speaker Playback Volume", WM8971_LOUT2V,
124  WM8971_ROUT2V, 0, 127, 0),
125 
126  SOC_ENUM("Bass Boost", wm8971_enum[0]),
127  SOC_ENUM("Bass Filter", wm8971_enum[1]),
128  SOC_SINGLE("Bass Volume", WM8971_BASS, 0, 7, 1),
129 
130  SOC_SINGLE("Treble Volume", WM8971_TREBLE, 0, 7, 0),
131  SOC_ENUM("Treble Cut-off", wm8971_enum[2]),
132 
133  SOC_SINGLE("Capture Filter Switch", WM8971_ADCDAC, 0, 1, 1),
134 
135  SOC_SINGLE("ALC Target Volume", WM8971_ALC1, 0, 7, 0),
136  SOC_SINGLE("ALC Max Volume", WM8971_ALC1, 4, 7, 0),
137 
138  SOC_SINGLE("ALC Capture Target Volume", WM8971_ALC1, 0, 7, 0),
139  SOC_SINGLE("ALC Capture Max Volume", WM8971_ALC1, 4, 7, 0),
140  SOC_ENUM("ALC Capture Function", wm8971_enum[3]),
141  SOC_SINGLE("ALC Capture ZC Switch", WM8971_ALC2, 7, 1, 0),
142  SOC_SINGLE("ALC Capture Hold Time", WM8971_ALC2, 0, 15, 0),
143  SOC_SINGLE("ALC Capture Decay Time", WM8971_ALC3, 4, 15, 0),
144  SOC_SINGLE("ALC Capture Attack Time", WM8971_ALC3, 0, 15, 0),
145  SOC_SINGLE("ALC Capture NG Threshold", WM8971_NGATE, 3, 31, 0),
146  SOC_ENUM("ALC Capture NG Type", wm8971_enum[4]),
147  SOC_SINGLE("ALC Capture NG Switch", WM8971_NGATE, 0, 1, 0),
148 
149  SOC_SINGLE("Capture 6dB Attenuate", WM8971_ADCDAC, 8, 1, 0),
150  SOC_SINGLE("Playback 6dB Attenuate", WM8971_ADCDAC, 7, 1, 0),
151 
152  SOC_ENUM("Playback De-emphasis", wm8971_enum[5]),
153  SOC_ENUM("Playback Function", wm8971_enum[6]),
154  SOC_ENUM("Playback Phase", wm8971_enum[7]),
155 
156  SOC_DOUBLE_R("Mic Boost", WM8971_LADCIN, WM8971_RADCIN, 4, 3, 0),
157 };
158 
159 /*
160  * DAPM Controls
161  */
162 
163 /* Left Mixer */
164 static const struct snd_kcontrol_new wm8971_left_mixer_controls[] = {
165 SOC_DAPM_SINGLE("Playback Switch", WM8971_LOUTM1, 8, 1, 0),
166 SOC_DAPM_SINGLE("Left Bypass Switch", WM8971_LOUTM1, 7, 1, 0),
167 SOC_DAPM_SINGLE("Right Playback Switch", WM8971_LOUTM2, 8, 1, 0),
168 SOC_DAPM_SINGLE("Right Bypass Switch", WM8971_LOUTM2, 7, 1, 0),
169 };
170 
171 /* Right Mixer */
172 static const struct snd_kcontrol_new wm8971_right_mixer_controls[] = {
173 SOC_DAPM_SINGLE("Left Playback Switch", WM8971_ROUTM1, 8, 1, 0),
174 SOC_DAPM_SINGLE("Left Bypass Switch", WM8971_ROUTM1, 7, 1, 0),
175 SOC_DAPM_SINGLE("Playback Switch", WM8971_ROUTM2, 8, 1, 0),
176 SOC_DAPM_SINGLE("Right Bypass Switch", WM8971_ROUTM2, 7, 1, 0),
177 };
178 
179 /* Mono Mixer */
180 static const struct snd_kcontrol_new wm8971_mono_mixer_controls[] = {
181 SOC_DAPM_SINGLE("Left Playback Switch", WM8971_MOUTM1, 8, 1, 0),
182 SOC_DAPM_SINGLE("Left Bypass Switch", WM8971_MOUTM1, 7, 1, 0),
183 SOC_DAPM_SINGLE("Right Playback Switch", WM8971_MOUTM2, 8, 1, 0),
184 SOC_DAPM_SINGLE("Right Bypass Switch", WM8971_MOUTM2, 7, 1, 0),
185 };
186 
187 /* Left Line Mux */
188 static const struct snd_kcontrol_new wm8971_left_line_controls =
189 SOC_DAPM_ENUM("Route", wm8971_enum[8]);
190 
191 /* Right Line Mux */
192 static const struct snd_kcontrol_new wm8971_right_line_controls =
193 SOC_DAPM_ENUM("Route", wm8971_enum[9]);
194 
195 /* Left PGA Mux */
196 static const struct snd_kcontrol_new wm8971_left_pga_controls =
197 SOC_DAPM_ENUM("Route", wm8971_enum[10]);
198 
199 /* Right PGA Mux */
200 static const struct snd_kcontrol_new wm8971_right_pga_controls =
201 SOC_DAPM_ENUM("Route", wm8971_enum[11]);
202 
203 /* Mono ADC Mux */
204 static const struct snd_kcontrol_new wm8971_monomux_controls =
205 SOC_DAPM_ENUM("Route", wm8971_enum[13]);
206 
207 static const struct snd_soc_dapm_widget wm8971_dapm_widgets[] = {
208  SND_SOC_DAPM_MIXER("Left Mixer", SND_SOC_NOPM, 0, 0,
209  &wm8971_left_mixer_controls[0],
210  ARRAY_SIZE(wm8971_left_mixer_controls)),
211  SND_SOC_DAPM_MIXER("Right Mixer", SND_SOC_NOPM, 0, 0,
212  &wm8971_right_mixer_controls[0],
213  ARRAY_SIZE(wm8971_right_mixer_controls)),
214  SND_SOC_DAPM_MIXER("Mono Mixer", WM8971_PWR2, 2, 0,
215  &wm8971_mono_mixer_controls[0],
216  ARRAY_SIZE(wm8971_mono_mixer_controls)),
217 
218  SND_SOC_DAPM_PGA("Right Out 2", WM8971_PWR2, 3, 0, NULL, 0),
219  SND_SOC_DAPM_PGA("Left Out 2", WM8971_PWR2, 4, 0, NULL, 0),
220  SND_SOC_DAPM_PGA("Right Out 1", WM8971_PWR2, 5, 0, NULL, 0),
221  SND_SOC_DAPM_PGA("Left Out 1", WM8971_PWR2, 6, 0, NULL, 0),
222  SND_SOC_DAPM_DAC("Right DAC", "Right Playback", WM8971_PWR2, 7, 0),
223  SND_SOC_DAPM_DAC("Left DAC", "Left Playback", WM8971_PWR2, 8, 0),
224  SND_SOC_DAPM_PGA("Mono Out 1", WM8971_PWR2, 2, 0, NULL, 0),
225 
226  SND_SOC_DAPM_SUPPLY("Mic Bias", WM8971_PWR1, 1, 0, NULL, 0),
227  SND_SOC_DAPM_ADC("Right ADC", "Right Capture", WM8971_PWR1, 2, 0),
228  SND_SOC_DAPM_ADC("Left ADC", "Left Capture", WM8971_PWR1, 3, 0),
229 
230  SND_SOC_DAPM_MUX("Left PGA Mux", WM8971_PWR1, 5, 0,
231  &wm8971_left_pga_controls),
232  SND_SOC_DAPM_MUX("Right PGA Mux", WM8971_PWR1, 4, 0,
233  &wm8971_right_pga_controls),
234  SND_SOC_DAPM_MUX("Left Line Mux", SND_SOC_NOPM, 0, 0,
235  &wm8971_left_line_controls),
236  SND_SOC_DAPM_MUX("Right Line Mux", SND_SOC_NOPM, 0, 0,
237  &wm8971_right_line_controls),
238 
239  SND_SOC_DAPM_MUX("Left ADC Mux", SND_SOC_NOPM, 0, 0,
240  &wm8971_monomux_controls),
241  SND_SOC_DAPM_MUX("Right ADC Mux", SND_SOC_NOPM, 0, 0,
242  &wm8971_monomux_controls),
243 
244  SND_SOC_DAPM_OUTPUT("LOUT1"),
245  SND_SOC_DAPM_OUTPUT("ROUT1"),
246  SND_SOC_DAPM_OUTPUT("LOUT2"),
247  SND_SOC_DAPM_OUTPUT("ROUT2"),
248  SND_SOC_DAPM_OUTPUT("MONO"),
249 
250  SND_SOC_DAPM_INPUT("LINPUT1"),
251  SND_SOC_DAPM_INPUT("RINPUT1"),
252  SND_SOC_DAPM_INPUT("MIC"),
253 };
254 
255 static const struct snd_soc_dapm_route wm8971_dapm_routes[] = {
256  /* left mixer */
257  {"Left Mixer", "Playback Switch", "Left DAC"},
258  {"Left Mixer", "Left Bypass Switch", "Left Line Mux"},
259  {"Left Mixer", "Right Playback Switch", "Right DAC"},
260  {"Left Mixer", "Right Bypass Switch", "Right Line Mux"},
261 
262  /* right mixer */
263  {"Right Mixer", "Left Playback Switch", "Left DAC"},
264  {"Right Mixer", "Left Bypass Switch", "Left Line Mux"},
265  {"Right Mixer", "Playback Switch", "Right DAC"},
266  {"Right Mixer", "Right Bypass Switch", "Right Line Mux"},
267 
268  /* left out 1 */
269  {"Left Out 1", NULL, "Left Mixer"},
270  {"LOUT1", NULL, "Left Out 1"},
271 
272  /* left out 2 */
273  {"Left Out 2", NULL, "Left Mixer"},
274  {"LOUT2", NULL, "Left Out 2"},
275 
276  /* right out 1 */
277  {"Right Out 1", NULL, "Right Mixer"},
278  {"ROUT1", NULL, "Right Out 1"},
279 
280  /* right out 2 */
281  {"Right Out 2", NULL, "Right Mixer"},
282  {"ROUT2", NULL, "Right Out 2"},
283 
284  /* mono mixer */
285  {"Mono Mixer", "Left Playback Switch", "Left DAC"},
286  {"Mono Mixer", "Left Bypass Switch", "Left Line Mux"},
287  {"Mono Mixer", "Right Playback Switch", "Right DAC"},
288  {"Mono Mixer", "Right Bypass Switch", "Right Line Mux"},
289 
290  /* mono out */
291  {"Mono Out", NULL, "Mono Mixer"},
292  {"MONO1", NULL, "Mono Out"},
293 
294  /* Left Line Mux */
295  {"Left Line Mux", "Line", "LINPUT1"},
296  {"Left Line Mux", "PGA", "Left PGA Mux"},
297  {"Left Line Mux", "Differential", "Differential Mux"},
298 
299  /* Right Line Mux */
300  {"Right Line Mux", "Line", "RINPUT1"},
301  {"Right Line Mux", "Mic", "MIC"},
302  {"Right Line Mux", "PGA", "Right PGA Mux"},
303  {"Right Line Mux", "Differential", "Differential Mux"},
304 
305  /* Left PGA Mux */
306  {"Left PGA Mux", "Line", "LINPUT1"},
307  {"Left PGA Mux", "Differential", "Differential Mux"},
308 
309  /* Right PGA Mux */
310  {"Right PGA Mux", "Line", "RINPUT1"},
311  {"Right PGA Mux", "Differential", "Differential Mux"},
312 
313  /* Differential Mux */
314  {"Differential Mux", "Line", "LINPUT1"},
315  {"Differential Mux", "Line", "RINPUT1"},
316 
317  /* Left ADC Mux */
318  {"Left ADC Mux", "Stereo", "Left PGA Mux"},
319  {"Left ADC Mux", "Mono (Left)", "Left PGA Mux"},
320  {"Left ADC Mux", "Digital Mono", "Left PGA Mux"},
321 
322  /* Right ADC Mux */
323  {"Right ADC Mux", "Stereo", "Right PGA Mux"},
324  {"Right ADC Mux", "Mono (Right)", "Right PGA Mux"},
325  {"Right ADC Mux", "Digital Mono", "Right PGA Mux"},
326 
327  /* ADC */
328  {"Left ADC", NULL, "Left ADC Mux"},
329  {"Right ADC", NULL, "Right ADC Mux"},
330 };
331 
332 struct _coeff_div {
333  u32 mclk;
334  u32 rate;
335  u16 fs;
336  u8 sr:5;
337  u8 usb:1;
338 };
339 
340 /* codec hifi mclk clock divider coefficients */
341 static const struct _coeff_div coeff_div[] = {
342  /* 8k */
343  {12288000, 8000, 1536, 0x6, 0x0},
344  {11289600, 8000, 1408, 0x16, 0x0},
345  {18432000, 8000, 2304, 0x7, 0x0},
346  {16934400, 8000, 2112, 0x17, 0x0},
347  {12000000, 8000, 1500, 0x6, 0x1},
348 
349  /* 11.025k */
350  {11289600, 11025, 1024, 0x18, 0x0},
351  {16934400, 11025, 1536, 0x19, 0x0},
352  {12000000, 11025, 1088, 0x19, 0x1},
353 
354  /* 16k */
355  {12288000, 16000, 768, 0xa, 0x0},
356  {18432000, 16000, 1152, 0xb, 0x0},
357  {12000000, 16000, 750, 0xa, 0x1},
358 
359  /* 22.05k */
360  {11289600, 22050, 512, 0x1a, 0x0},
361  {16934400, 22050, 768, 0x1b, 0x0},
362  {12000000, 22050, 544, 0x1b, 0x1},
363 
364  /* 32k */
365  {12288000, 32000, 384, 0xc, 0x0},
366  {18432000, 32000, 576, 0xd, 0x0},
367  {12000000, 32000, 375, 0xa, 0x1},
368 
369  /* 44.1k */
370  {11289600, 44100, 256, 0x10, 0x0},
371  {16934400, 44100, 384, 0x11, 0x0},
372  {12000000, 44100, 272, 0x11, 0x1},
373 
374  /* 48k */
375  {12288000, 48000, 256, 0x0, 0x0},
376  {18432000, 48000, 384, 0x1, 0x0},
377  {12000000, 48000, 250, 0x0, 0x1},
378 
379  /* 88.2k */
380  {11289600, 88200, 128, 0x1e, 0x0},
381  {16934400, 88200, 192, 0x1f, 0x0},
382  {12000000, 88200, 136, 0x1f, 0x1},
383 
384  /* 96k */
385  {12288000, 96000, 128, 0xe, 0x0},
386  {18432000, 96000, 192, 0xf, 0x0},
387  {12000000, 96000, 125, 0xe, 0x1},
388 };
389 
390 static int get_coeff(int mclk, int rate)
391 {
392  int i;
393 
394  for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
395  if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
396  return i;
397  }
398  return -EINVAL;
399 }
400 
401 static int wm8971_set_dai_sysclk(struct snd_soc_dai *codec_dai,
402  int clk_id, unsigned int freq, int dir)
403 {
404  struct snd_soc_codec *codec = codec_dai->codec;
405  struct wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
406 
407  switch (freq) {
408  case 11289600:
409  case 12000000:
410  case 12288000:
411  case 16934400:
412  case 18432000:
413  wm8971->sysclk = freq;
414  return 0;
415  }
416  return -EINVAL;
417 }
418 
419 static int wm8971_set_dai_fmt(struct snd_soc_dai *codec_dai,
420  unsigned int fmt)
421 {
422  struct snd_soc_codec *codec = codec_dai->codec;
423  u16 iface = 0;
424 
425  /* set master/slave audio interface */
426  switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
427  case SND_SOC_DAIFMT_CBM_CFM:
428  iface = 0x0040;
429  break;
430  case SND_SOC_DAIFMT_CBS_CFS:
431  break;
432  default:
433  return -EINVAL;
434  }
435 
436  /* interface format */
437  switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
438  case SND_SOC_DAIFMT_I2S:
439  iface |= 0x0002;
440  break;
441  case SND_SOC_DAIFMT_RIGHT_J:
442  break;
443  case SND_SOC_DAIFMT_LEFT_J:
444  iface |= 0x0001;
445  break;
446  case SND_SOC_DAIFMT_DSP_A:
447  iface |= 0x0003;
448  break;
449  case SND_SOC_DAIFMT_DSP_B:
450  iface |= 0x0013;
451  break;
452  default:
453  return -EINVAL;
454  }
455 
456  /* clock inversion */
457  switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
458  case SND_SOC_DAIFMT_NB_NF:
459  break;
460  case SND_SOC_DAIFMT_IB_IF:
461  iface |= 0x0090;
462  break;
463  case SND_SOC_DAIFMT_IB_NF:
464  iface |= 0x0080;
465  break;
466  case SND_SOC_DAIFMT_NB_IF:
467  iface |= 0x0010;
468  break;
469  default:
470  return -EINVAL;
471  }
472 
473  snd_soc_write(codec, WM8971_IFACE, iface);
474  return 0;
475 }
476 
477 static int wm8971_pcm_hw_params(struct snd_pcm_substream *substream,
478  struct snd_pcm_hw_params *params,
479  struct snd_soc_dai *dai)
480 {
481  struct snd_soc_codec *codec = dai->codec;
482  struct wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
483  u16 iface = snd_soc_read(codec, WM8971_IFACE) & 0x1f3;
484  u16 srate = snd_soc_read(codec, WM8971_SRATE) & 0x1c0;
485  int coeff = get_coeff(wm8971->sysclk, params_rate(params));
486 
487  /* bit size */
488  switch (params_format(params)) {
489  case SNDRV_PCM_FORMAT_S16_LE:
490  break;
491  case SNDRV_PCM_FORMAT_S20_3LE:
492  iface |= 0x0004;
493  break;
494  case SNDRV_PCM_FORMAT_S24_LE:
495  iface |= 0x0008;
496  break;
497  case SNDRV_PCM_FORMAT_S32_LE:
498  iface |= 0x000c;
499  break;
500  }
501 
502  /* set iface & srate */
503  snd_soc_write(codec, WM8971_IFACE, iface);
504  if (coeff >= 0)
505  snd_soc_write(codec, WM8971_SRATE, srate |
506  (coeff_div[coeff].sr << 1) | coeff_div[coeff].usb);
507 
508  return 0;
509 }
510 
511 static int wm8971_mute(struct snd_soc_dai *dai, int mute)
512 {
513  struct snd_soc_codec *codec = dai->codec;
514  u16 mute_reg = snd_soc_read(codec, WM8971_ADCDAC) & 0xfff7;
515 
516  if (mute)
517  snd_soc_write(codec, WM8971_ADCDAC, mute_reg | 0x8);
518  else
519  snd_soc_write(codec, WM8971_ADCDAC, mute_reg);
520  return 0;
521 }
522 
523 static int wm8971_set_bias_level(struct snd_soc_codec *codec,
524  enum snd_soc_bias_level level)
525 {
526  u16 pwr_reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
527 
528  switch (level) {
529  case SND_SOC_BIAS_ON:
530  /* set vmid to 50k and unmute dac */
531  snd_soc_write(codec, WM8971_PWR1, pwr_reg | 0x00c1);
532  break;
533  case SND_SOC_BIAS_PREPARE:
534  break;
535  case SND_SOC_BIAS_STANDBY:
536  if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
537  snd_soc_cache_sync(codec);
538 
539  /* mute dac and set vmid to 500k, enable VREF */
540  snd_soc_write(codec, WM8971_PWR1, pwr_reg | 0x0140);
541  break;
542  case SND_SOC_BIAS_OFF:
543  snd_soc_write(codec, WM8971_PWR1, 0x0001);
544  break;
545  }
546  codec->dapm.bias_level = level;
547  return 0;
548 }
549 
550 #define WM8971_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
551  SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
552  SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
553 
554 #define WM8971_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
555  SNDRV_PCM_FMTBIT_S24_LE)
556 
557 static const struct snd_soc_dai_ops wm8971_dai_ops = {
558  .hw_params = wm8971_pcm_hw_params,
559  .digital_mute = wm8971_mute,
560  .set_fmt = wm8971_set_dai_fmt,
561  .set_sysclk = wm8971_set_dai_sysclk,
562 };
563 
564 static struct snd_soc_dai_driver wm8971_dai = {
565  .name = "wm8971-hifi",
566  .playback = {
567  .stream_name = "Playback",
568  .channels_min = 1,
569  .channels_max = 2,
570  .rates = WM8971_RATES,
571  .formats = WM8971_FORMATS,},
572  .capture = {
573  .stream_name = "Capture",
574  .channels_min = 1,
575  .channels_max = 2,
576  .rates = WM8971_RATES,
577  .formats = WM8971_FORMATS,},
578  .ops = &wm8971_dai_ops,
579 };
580 
581 static void wm8971_work(struct work_struct *work)
582 {
583  struct snd_soc_dapm_context *dapm =
584  container_of(work, struct snd_soc_dapm_context,
585  delayed_work.work);
586  struct snd_soc_codec *codec = dapm->codec;
587  wm8971_set_bias_level(codec, codec->dapm.bias_level);
588 }
589 
590 static int wm8971_suspend(struct snd_soc_codec *codec)
591 {
592  wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
593  return 0;
594 }
595 
596 static int wm8971_resume(struct snd_soc_codec *codec)
597 {
598  u16 reg;
599 
600  wm8971_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
601 
602  /* charge wm8971 caps */
603  if (codec->dapm.suspend_bias_level == SND_SOC_BIAS_ON) {
604  reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
605  snd_soc_write(codec, WM8971_PWR1, reg | 0x01c0);
606  codec->dapm.bias_level = SND_SOC_BIAS_ON;
607  queue_delayed_work(wm8971_workq, &codec->dapm.delayed_work,
608  msecs_to_jiffies(1000));
609  }
610 
611  return 0;
612 }
613 
614 static int wm8971_probe(struct snd_soc_codec *codec)
615 {
616  struct wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
617  int ret = 0;
618  u16 reg;
619 
620  ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8971->control_type);
621  if (ret < 0) {
622  printk(KERN_ERR "wm8971: failed to set cache I/O: %d\n", ret);
623  return ret;
624  }
625 
626  INIT_DELAYED_WORK(&codec->dapm.delayed_work, wm8971_work);
627  wm8971_workq = create_workqueue("wm8971");
628  if (wm8971_workq == NULL)
629  return -ENOMEM;
630 
631  wm8971_reset(codec);
632 
633  /* charge output caps - set vmid to 5k for quick power up */
634  reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
635  snd_soc_write(codec, WM8971_PWR1, reg | 0x01c0);
636  codec->dapm.bias_level = SND_SOC_BIAS_STANDBY;
637  queue_delayed_work(wm8971_workq, &codec->dapm.delayed_work,
638  msecs_to_jiffies(1000));
639 
640  /* set the update bits */
641  snd_soc_update_bits(codec, WM8971_LDAC, 0x0100, 0x0100);
642  snd_soc_update_bits(codec, WM8971_RDAC, 0x0100, 0x0100);
643  snd_soc_update_bits(codec, WM8971_LOUT1V, 0x0100, 0x0100);
644  snd_soc_update_bits(codec, WM8971_ROUT1V, 0x0100, 0x0100);
645  snd_soc_update_bits(codec, WM8971_LOUT2V, 0x0100, 0x0100);
646  snd_soc_update_bits(codec, WM8971_ROUT2V, 0x0100, 0x0100);
647  snd_soc_update_bits(codec, WM8971_LINVOL, 0x0100, 0x0100);
648  snd_soc_update_bits(codec, WM8971_RINVOL, 0x0100, 0x0100);
649 
650  return ret;
651 }
652 
653 
654 /* power down chip */
655 static int wm8971_remove(struct snd_soc_codec *codec)
656 {
657  wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
658 
659  if (wm8971_workq)
660  destroy_workqueue(wm8971_workq);
661  return 0;
662 }
663 
664 static struct snd_soc_codec_driver soc_codec_dev_wm8971 = {
665  .probe = wm8971_probe,
666  .remove = wm8971_remove,
667  .suspend = wm8971_suspend,
668  .resume = wm8971_resume,
669  .set_bias_level = wm8971_set_bias_level,
670  .reg_cache_size = ARRAY_SIZE(wm8971_reg),
671  .reg_word_size = sizeof(u16),
672  .reg_cache_default = wm8971_reg,
673 
674  .controls = wm8971_snd_controls,
675  .num_controls = ARRAY_SIZE(wm8971_snd_controls),
676  .dapm_widgets = wm8971_dapm_widgets,
677  .num_dapm_widgets = ARRAY_SIZE(wm8971_dapm_widgets),
678  .dapm_routes = wm8971_dapm_routes,
679  .num_dapm_routes = ARRAY_SIZE(wm8971_dapm_routes),
680 };
681 
682 static __devinit int wm8971_i2c_probe(struct i2c_client *i2c,
683  const struct i2c_device_id *id)
684 {
685  struct wm8971_priv *wm8971;
686  int ret;
687 
688  wm8971 = devm_kzalloc(&i2c->dev, sizeof(struct wm8971_priv),
689  GFP_KERNEL);
690  if (wm8971 == NULL)
691  return -ENOMEM;
692 
693  wm8971->control_type = SND_SOC_I2C;
694  i2c_set_clientdata(i2c, wm8971);
695 
696  ret = snd_soc_register_codec(&i2c->dev,
697  &soc_codec_dev_wm8971, &wm8971_dai, 1);
698 
699  return ret;
700 }
701 
702 static __devexit int wm8971_i2c_remove(struct i2c_client *client)
703 {
704  snd_soc_unregister_codec(&client->dev);
705  return 0;
706 }
707 
708 static const struct i2c_device_id wm8971_i2c_id[] = {
709  { "wm8971", 0 },
710  { }
711 };
712 MODULE_DEVICE_TABLE(i2c, wm8971_i2c_id);
713 
714 static struct i2c_driver wm8971_i2c_driver = {
715  .driver = {
716  .name = "wm8971",
717  .owner = THIS_MODULE,
718  },
719  .probe = wm8971_i2c_probe,
720  .remove = __devexit_p(wm8971_i2c_remove),
721  .id_table = wm8971_i2c_id,
722 };
723 
724 module_i2c_driver(wm8971_i2c_driver);
725 
726 MODULE_DESCRIPTION("ASoC WM8971 driver");
727 MODULE_AUTHOR("Lab126");
728 MODULE_LICENSE("GPL");
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