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/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
get_coeff(int mclk,int rate)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
wm8971_set_dai_sysclk(struct snd_soc_dai * codec_dai,int clk_id,unsigned int freq,int dir)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
wm8971_set_dai_fmt(struct snd_soc_dai * codec_dai,unsigned int fmt)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
wm8971_pcm_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)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_pcm_runtime *rtd = substream->private_data;
482 struct snd_soc_codec *codec = rtd->codec;
483 struct wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
484 u16 iface = snd_soc_read(codec, WM8971_IFACE) & 0x1f3;
485 u16 srate = snd_soc_read(codec, WM8971_SRATE) & 0x1c0;
486 int coeff = get_coeff(wm8971->sysclk, params_rate(params));
487
488 /* bit size */
489 switch (params_format(params)) {
490 case SNDRV_PCM_FORMAT_S16_LE:
491 break;
492 case SNDRV_PCM_FORMAT_S20_3LE:
493 iface |= 0x0004;
494 break;
495 case SNDRV_PCM_FORMAT_S24_LE:
496 iface |= 0x0008;
497 break;
498 case SNDRV_PCM_FORMAT_S32_LE:
499 iface |= 0x000c;
500 break;
501 }
502
503 /* set iface & srate */
504 snd_soc_write(codec, WM8971_IFACE, iface);
505 if (coeff >= 0)
506 snd_soc_write(codec, WM8971_SRATE, srate |
507 (coeff_div[coeff].sr << 1) | coeff_div[coeff].usb);
508
509 return 0;
510 }
511
wm8971_mute(struct snd_soc_dai * dai,int mute)512 static int wm8971_mute(struct snd_soc_dai *dai, int mute)
513 {
514 struct snd_soc_codec *codec = dai->codec;
515 u16 mute_reg = snd_soc_read(codec, WM8971_ADCDAC) & 0xfff7;
516
517 if (mute)
518 snd_soc_write(codec, WM8971_ADCDAC, mute_reg | 0x8);
519 else
520 snd_soc_write(codec, WM8971_ADCDAC, mute_reg);
521 return 0;
522 }
523
wm8971_set_bias_level(struct snd_soc_codec * codec,enum snd_soc_bias_level level)524 static int wm8971_set_bias_level(struct snd_soc_codec *codec,
525 enum snd_soc_bias_level level)
526 {
527 u16 pwr_reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
528
529 switch (level) {
530 case SND_SOC_BIAS_ON:
531 /* set vmid to 50k and unmute dac */
532 snd_soc_write(codec, WM8971_PWR1, pwr_reg | 0x00c1);
533 break;
534 case SND_SOC_BIAS_PREPARE:
535 break;
536 case SND_SOC_BIAS_STANDBY:
537 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
538 snd_soc_cache_sync(codec);
539
540 /* mute dac and set vmid to 500k, enable VREF */
541 snd_soc_write(codec, WM8971_PWR1, pwr_reg | 0x0140);
542 break;
543 case SND_SOC_BIAS_OFF:
544 snd_soc_write(codec, WM8971_PWR1, 0x0001);
545 break;
546 }
547 codec->dapm.bias_level = level;
548 return 0;
549 }
550
551 #define WM8971_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
552 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
553 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
554
555 #define WM8971_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
556 SNDRV_PCM_FMTBIT_S24_LE)
557
558 static const struct snd_soc_dai_ops wm8971_dai_ops = {
559 .hw_params = wm8971_pcm_hw_params,
560 .digital_mute = wm8971_mute,
561 .set_fmt = wm8971_set_dai_fmt,
562 .set_sysclk = wm8971_set_dai_sysclk,
563 };
564
565 static struct snd_soc_dai_driver wm8971_dai = {
566 .name = "wm8971-hifi",
567 .playback = {
568 .stream_name = "Playback",
569 .channels_min = 1,
570 .channels_max = 2,
571 .rates = WM8971_RATES,
572 .formats = WM8971_FORMATS,},
573 .capture = {
574 .stream_name = "Capture",
575 .channels_min = 1,
576 .channels_max = 2,
577 .rates = WM8971_RATES,
578 .formats = WM8971_FORMATS,},
579 .ops = &wm8971_dai_ops,
580 };
581
wm8971_work(struct work_struct * work)582 static void wm8971_work(struct work_struct *work)
583 {
584 struct snd_soc_dapm_context *dapm =
585 container_of(work, struct snd_soc_dapm_context,
586 delayed_work.work);
587 struct snd_soc_codec *codec = dapm->codec;
588 wm8971_set_bias_level(codec, codec->dapm.bias_level);
589 }
590
wm8971_suspend(struct snd_soc_codec * codec)591 static int wm8971_suspend(struct snd_soc_codec *codec)
592 {
593 wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
594 return 0;
595 }
596
wm8971_resume(struct snd_soc_codec * codec)597 static int wm8971_resume(struct snd_soc_codec *codec)
598 {
599 u16 reg;
600
601 wm8971_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
602
603 /* charge wm8971 caps */
604 if (codec->dapm.suspend_bias_level == SND_SOC_BIAS_ON) {
605 reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
606 snd_soc_write(codec, WM8971_PWR1, reg | 0x01c0);
607 codec->dapm.bias_level = SND_SOC_BIAS_ON;
608 queue_delayed_work(wm8971_workq, &codec->dapm.delayed_work,
609 msecs_to_jiffies(1000));
610 }
611
612 return 0;
613 }
614
wm8971_probe(struct snd_soc_codec * codec)615 static int wm8971_probe(struct snd_soc_codec *codec)
616 {
617 struct wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
618 int ret = 0;
619 u16 reg;
620
621 ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8971->control_type);
622 if (ret < 0) {
623 printk(KERN_ERR "wm8971: failed to set cache I/O: %d\n", ret);
624 return ret;
625 }
626
627 INIT_DELAYED_WORK(&codec->dapm.delayed_work, wm8971_work);
628 wm8971_workq = create_workqueue("wm8971");
629 if (wm8971_workq == NULL)
630 return -ENOMEM;
631
632 wm8971_reset(codec);
633
634 /* charge output caps - set vmid to 5k for quick power up */
635 reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
636 snd_soc_write(codec, WM8971_PWR1, reg | 0x01c0);
637 codec->dapm.bias_level = SND_SOC_BIAS_STANDBY;
638 queue_delayed_work(wm8971_workq, &codec->dapm.delayed_work,
639 msecs_to_jiffies(1000));
640
641 /* set the update bits */
642 snd_soc_update_bits(codec, WM8971_LDAC, 0x0100, 0x0100);
643 snd_soc_update_bits(codec, WM8971_RDAC, 0x0100, 0x0100);
644 snd_soc_update_bits(codec, WM8971_LOUT1V, 0x0100, 0x0100);
645 snd_soc_update_bits(codec, WM8971_ROUT1V, 0x0100, 0x0100);
646 snd_soc_update_bits(codec, WM8971_LOUT2V, 0x0100, 0x0100);
647 snd_soc_update_bits(codec, WM8971_ROUT2V, 0x0100, 0x0100);
648 snd_soc_update_bits(codec, WM8971_LINVOL, 0x0100, 0x0100);
649 snd_soc_update_bits(codec, WM8971_RINVOL, 0x0100, 0x0100);
650
651 return ret;
652 }
653
654
655 /* power down chip */
wm8971_remove(struct snd_soc_codec * codec)656 static int wm8971_remove(struct snd_soc_codec *codec)
657 {
658 wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
659
660 if (wm8971_workq)
661 destroy_workqueue(wm8971_workq);
662 return 0;
663 }
664
665 static struct snd_soc_codec_driver soc_codec_dev_wm8971 = {
666 .probe = wm8971_probe,
667 .remove = wm8971_remove,
668 .suspend = wm8971_suspend,
669 .resume = wm8971_resume,
670 .set_bias_level = wm8971_set_bias_level,
671 .reg_cache_size = ARRAY_SIZE(wm8971_reg),
672 .reg_word_size = sizeof(u16),
673 .reg_cache_default = wm8971_reg,
674
675 .controls = wm8971_snd_controls,
676 .num_controls = ARRAY_SIZE(wm8971_snd_controls),
677 .dapm_widgets = wm8971_dapm_widgets,
678 .num_dapm_widgets = ARRAY_SIZE(wm8971_dapm_widgets),
679 .dapm_routes = wm8971_dapm_routes,
680 .num_dapm_routes = ARRAY_SIZE(wm8971_dapm_routes),
681 };
682
wm8971_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)683 static __devinit int wm8971_i2c_probe(struct i2c_client *i2c,
684 const struct i2c_device_id *id)
685 {
686 struct wm8971_priv *wm8971;
687 int ret;
688
689 wm8971 = devm_kzalloc(&i2c->dev, sizeof(struct wm8971_priv),
690 GFP_KERNEL);
691 if (wm8971 == NULL)
692 return -ENOMEM;
693
694 wm8971->control_type = SND_SOC_I2C;
695 i2c_set_clientdata(i2c, wm8971);
696
697 ret = snd_soc_register_codec(&i2c->dev,
698 &soc_codec_dev_wm8971, &wm8971_dai, 1);
699
700 return ret;
701 }
702
wm8971_i2c_remove(struct i2c_client * client)703 static __devexit int wm8971_i2c_remove(struct i2c_client *client)
704 {
705 snd_soc_unregister_codec(&client->dev);
706 return 0;
707 }
708
709 static const struct i2c_device_id wm8971_i2c_id[] = {
710 { "wm8971", 0 },
711 { }
712 };
713 MODULE_DEVICE_TABLE(i2c, wm8971_i2c_id);
714
715 static struct i2c_driver wm8971_i2c_driver = {
716 .driver = {
717 .name = "wm8971",
718 .owner = THIS_MODULE,
719 },
720 .probe = wm8971_i2c_probe,
721 .remove = __devexit_p(wm8971_i2c_remove),
722 .id_table = wm8971_i2c_id,
723 };
724
wm8971_modinit(void)725 static int __init wm8971_modinit(void)
726 {
727 int ret = 0;
728 ret = i2c_add_driver(&wm8971_i2c_driver);
729 if (ret != 0) {
730 printk(KERN_ERR "Failed to register WM8971 I2C driver: %d\n",
731 ret);
732 }
733 return ret;
734 }
735 module_init(wm8971_modinit);
736
wm8971_exit(void)737 static void __exit wm8971_exit(void)
738 {
739 i2c_del_driver(&wm8971_i2c_driver);
740 }
741 module_exit(wm8971_exit);
742
743 MODULE_DESCRIPTION("ASoC WM8971 driver");
744 MODULE_AUTHOR("Lab126");
745 MODULE_LICENSE("GPL");
746