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8bae3e23 KK |
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/platform_device.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/soc-dapm.h> | |
28 | #include <sound/initval.h> | |
29 | ||
30 | #include "wm8971.h" | |
31 | ||
8bae3e23 KK |
32 | #define WM8971_VERSION "0.9" |
33 | ||
34 | #define WM8971_REG_COUNT 43 | |
35 | ||
36 | static struct workqueue_struct *wm8971_workq = NULL; | |
37 | ||
38 | /* codec private data */ | |
39 | struct wm8971_priv { | |
40 | unsigned int sysclk; | |
41 | }; | |
42 | ||
43 | /* | |
44 | * wm8971 register cache | |
45 | * We can't read the WM8971 register space when we | |
46 | * are using 2 wire for device control, so we cache them instead. | |
47 | */ | |
48 | static const u16 wm8971_reg[] = { | |
49 | 0x0097, 0x0097, 0x0079, 0x0079, /* 0 */ | |
50 | 0x0000, 0x0008, 0x0000, 0x000a, /* 4 */ | |
51 | 0x0000, 0x0000, 0x00ff, 0x00ff, /* 8 */ | |
52 | 0x000f, 0x000f, 0x0000, 0x0000, /* 12 */ | |
53 | 0x0000, 0x007b, 0x0000, 0x0032, /* 16 */ | |
54 | 0x0000, 0x00c3, 0x00c3, 0x00c0, /* 20 */ | |
55 | 0x0000, 0x0000, 0x0000, 0x0000, /* 24 */ | |
56 | 0x0000, 0x0000, 0x0000, 0x0000, /* 28 */ | |
57 | 0x0000, 0x0000, 0x0050, 0x0050, /* 32 */ | |
58 | 0x0050, 0x0050, 0x0050, 0x0050, /* 36 */ | |
59 | 0x0079, 0x0079, 0x0079, /* 40 */ | |
60 | }; | |
61 | ||
62 | static inline unsigned int wm8971_read_reg_cache(struct snd_soc_codec *codec, | |
63 | unsigned int reg) | |
64 | { | |
65 | u16 *cache = codec->reg_cache; | |
66 | if (reg < WM8971_REG_COUNT) | |
67 | return cache[reg]; | |
68 | ||
69 | return -1; | |
70 | } | |
71 | ||
72 | static inline void wm8971_write_reg_cache(struct snd_soc_codec *codec, | |
73 | unsigned int reg, unsigned int value) | |
74 | { | |
75 | u16 *cache = codec->reg_cache; | |
76 | if (reg < WM8971_REG_COUNT) | |
77 | cache[reg] = value; | |
78 | } | |
79 | ||
80 | static int wm8971_write(struct snd_soc_codec *codec, unsigned int reg, | |
81 | unsigned int value) | |
82 | { | |
83 | u8 data[2]; | |
84 | ||
85 | /* data is | |
86 | * D15..D9 WM8753 register offset | |
87 | * D8...D0 register data | |
88 | */ | |
89 | data[0] = (reg << 1) | ((value >> 8) & 0x0001); | |
90 | data[1] = value & 0x00ff; | |
91 | ||
92 | wm8971_write_reg_cache (codec, reg, value); | |
93 | if (codec->hw_write(codec->control_data, data, 2) == 2) | |
94 | return 0; | |
95 | else | |
96 | return -EIO; | |
97 | } | |
98 | ||
99 | #define wm8971_reset(c) wm8971_write(c, WM8971_RESET, 0) | |
100 | ||
101 | /* WM8971 Controls */ | |
102 | static const char *wm8971_bass[] = { "Linear Control", "Adaptive Boost" }; | |
103 | static const char *wm8971_bass_filter[] = { "130Hz @ 48kHz", | |
104 | "200Hz @ 48kHz" }; | |
105 | static const char *wm8971_treble[] = { "8kHz", "4kHz" }; | |
106 | static const char *wm8971_alc_func[] = { "Off", "Right", "Left", "Stereo" }; | |
107 | static const char *wm8971_ng_type[] = { "Constant PGA Gain", | |
108 | "Mute ADC Output" }; | |
109 | static const char *wm8971_deemp[] = { "None", "32kHz", "44.1kHz", "48kHz" }; | |
110 | static const char *wm8971_mono_mux[] = {"Stereo", "Mono (Left)", | |
111 | "Mono (Right)", "Digital Mono"}; | |
112 | static const char *wm8971_dac_phase[] = { "Non Inverted", "Inverted" }; | |
113 | static const char *wm8971_lline_mux[] = {"Line", "NC", "NC", "PGA", | |
114 | "Differential"}; | |
115 | static const char *wm8971_rline_mux[] = {"Line", "Mic", "NC", "PGA", | |
116 | "Differential"}; | |
117 | static const char *wm8971_lpga_sel[] = {"Line", "NC", "NC", "Differential"}; | |
118 | static const char *wm8971_rpga_sel[] = {"Line", "Mic", "NC", "Differential"}; | |
119 | static const char *wm8971_adcpol[] = {"Normal", "L Invert", "R Invert", | |
120 | "L + R Invert"}; | |
121 | ||
122 | static const struct soc_enum wm8971_enum[] = { | |
123 | SOC_ENUM_SINGLE(WM8971_BASS, 7, 2, wm8971_bass), /* 0 */ | |
124 | SOC_ENUM_SINGLE(WM8971_BASS, 6, 2, wm8971_bass_filter), | |
125 | SOC_ENUM_SINGLE(WM8971_TREBLE, 6, 2, wm8971_treble), | |
126 | SOC_ENUM_SINGLE(WM8971_ALC1, 7, 4, wm8971_alc_func), | |
127 | SOC_ENUM_SINGLE(WM8971_NGATE, 1, 2, wm8971_ng_type), /* 4 */ | |
128 | SOC_ENUM_SINGLE(WM8971_ADCDAC, 1, 4, wm8971_deemp), | |
129 | SOC_ENUM_SINGLE(WM8971_ADCTL1, 4, 4, wm8971_mono_mux), | |
130 | SOC_ENUM_SINGLE(WM8971_ADCTL1, 1, 2, wm8971_dac_phase), | |
131 | SOC_ENUM_SINGLE(WM8971_LOUTM1, 0, 5, wm8971_lline_mux), /* 8 */ | |
132 | SOC_ENUM_SINGLE(WM8971_ROUTM1, 0, 5, wm8971_rline_mux), | |
133 | SOC_ENUM_SINGLE(WM8971_LADCIN, 6, 4, wm8971_lpga_sel), | |
134 | SOC_ENUM_SINGLE(WM8971_RADCIN, 6, 4, wm8971_rpga_sel), | |
135 | SOC_ENUM_SINGLE(WM8971_ADCDAC, 5, 4, wm8971_adcpol), /* 12 */ | |
136 | SOC_ENUM_SINGLE(WM8971_ADCIN, 6, 4, wm8971_mono_mux), | |
137 | }; | |
138 | ||
139 | static const struct snd_kcontrol_new wm8971_snd_controls[] = { | |
140 | SOC_DOUBLE_R("Capture Volume", WM8971_LINVOL, WM8971_RINVOL, 0, 63, 0), | |
141 | SOC_DOUBLE_R("Capture ZC Switch", WM8971_LINVOL, WM8971_RINVOL, | |
142 | 6, 1, 0), | |
143 | SOC_DOUBLE_R("Capture Switch", WM8971_LINVOL, WM8971_RINVOL, 7, 1, 1), | |
144 | ||
145 | SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8971_LOUT1V, | |
146 | WM8971_ROUT1V, 7, 1, 0), | |
147 | SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8971_LOUT2V, | |
148 | WM8971_ROUT2V, 7, 1, 0), | |
149 | SOC_SINGLE("Mono Playback ZC Switch", WM8971_MOUTV, 7, 1, 0), | |
150 | ||
151 | SOC_DOUBLE_R("PCM Volume", WM8971_LDAC, WM8971_RDAC, 0, 255, 0), | |
152 | ||
153 | SOC_DOUBLE_R("Bypass Left Playback Volume", WM8971_LOUTM1, | |
154 | WM8971_LOUTM2, 4, 7, 1), | |
155 | SOC_DOUBLE_R("Bypass Right Playback Volume", WM8971_ROUTM1, | |
156 | WM8971_ROUTM2, 4, 7, 1), | |
157 | SOC_DOUBLE_R("Bypass Mono Playback Volume", WM8971_MOUTM1, | |
158 | WM8971_MOUTM2, 4, 7, 1), | |
159 | ||
160 | SOC_DOUBLE_R("Headphone Playback Volume", WM8971_LOUT1V, | |
161 | WM8971_ROUT1V, 0, 127, 0), | |
162 | SOC_DOUBLE_R("Speaker Playback Volume", WM8971_LOUT2V, | |
163 | WM8971_ROUT2V, 0, 127, 0), | |
164 | ||
165 | SOC_ENUM("Bass Boost", wm8971_enum[0]), | |
166 | SOC_ENUM("Bass Filter", wm8971_enum[1]), | |
167 | SOC_SINGLE("Bass Volume", WM8971_BASS, 0, 7, 1), | |
168 | ||
169 | SOC_SINGLE("Treble Volume", WM8971_TREBLE, 0, 7, 0), | |
170 | SOC_ENUM("Treble Cut-off", wm8971_enum[2]), | |
171 | ||
172 | SOC_SINGLE("Capture Filter Switch", WM8971_ADCDAC, 0, 1, 1), | |
173 | ||
174 | SOC_SINGLE("ALC Target Volume", WM8971_ALC1, 0, 7, 0), | |
175 | SOC_SINGLE("ALC Max Volume", WM8971_ALC1, 4, 7, 0), | |
176 | ||
177 | SOC_SINGLE("ALC Capture Target Volume", WM8971_ALC1, 0, 7, 0), | |
178 | SOC_SINGLE("ALC Capture Max Volume", WM8971_ALC1, 4, 7, 0), | |
179 | SOC_ENUM("ALC Capture Function", wm8971_enum[3]), | |
180 | SOC_SINGLE("ALC Capture ZC Switch", WM8971_ALC2, 7, 1, 0), | |
181 | SOC_SINGLE("ALC Capture Hold Time", WM8971_ALC2, 0, 15, 0), | |
182 | SOC_SINGLE("ALC Capture Decay Time", WM8971_ALC3, 4, 15, 0), | |
183 | SOC_SINGLE("ALC Capture Attack Time", WM8971_ALC3, 0, 15, 0), | |
184 | SOC_SINGLE("ALC Capture NG Threshold", WM8971_NGATE, 3, 31, 0), | |
185 | SOC_ENUM("ALC Capture NG Type", wm8971_enum[4]), | |
186 | SOC_SINGLE("ALC Capture NG Switch", WM8971_NGATE, 0, 1, 0), | |
187 | ||
188 | SOC_SINGLE("Capture 6dB Attenuate", WM8971_ADCDAC, 8, 1, 0), | |
189 | SOC_SINGLE("Playback 6dB Attenuate", WM8971_ADCDAC, 7, 1, 0), | |
190 | ||
191 | SOC_ENUM("Playback De-emphasis", wm8971_enum[5]), | |
192 | SOC_ENUM("Playback Function", wm8971_enum[6]), | |
193 | SOC_ENUM("Playback Phase", wm8971_enum[7]), | |
194 | ||
195 | SOC_DOUBLE_R("Mic Boost", WM8971_LADCIN, WM8971_RADCIN, 4, 3, 0), | |
196 | }; | |
197 | ||
198 | /* add non-DAPM controls */ | |
199 | static int wm8971_add_controls(struct snd_soc_codec *codec) | |
200 | { | |
201 | int err, i; | |
202 | ||
203 | for (i = 0; i < ARRAY_SIZE(wm8971_snd_controls); i++) { | |
204 | err = snd_ctl_add(codec->card, | |
205 | snd_soc_cnew(&wm8971_snd_controls[i], | |
206 | codec, NULL)); | |
207 | if (err < 0) | |
208 | return err; | |
209 | } | |
210 | return 0; | |
211 | } | |
212 | ||
213 | /* | |
214 | * DAPM Controls | |
215 | */ | |
216 | ||
217 | /* Left Mixer */ | |
218 | static const struct snd_kcontrol_new wm8971_left_mixer_controls[] = { | |
219 | SOC_DAPM_SINGLE("Playback Switch", WM8971_LOUTM1, 8, 1, 0), | |
220 | SOC_DAPM_SINGLE("Left Bypass Switch", WM8971_LOUTM1, 7, 1, 0), | |
221 | SOC_DAPM_SINGLE("Right Playback Switch", WM8971_LOUTM2, 8, 1, 0), | |
222 | SOC_DAPM_SINGLE("Right Bypass Switch", WM8971_LOUTM2, 7, 1, 0), | |
223 | }; | |
224 | ||
225 | /* Right Mixer */ | |
226 | static const struct snd_kcontrol_new wm8971_right_mixer_controls[] = { | |
227 | SOC_DAPM_SINGLE("Left Playback Switch", WM8971_ROUTM1, 8, 1, 0), | |
228 | SOC_DAPM_SINGLE("Left Bypass Switch", WM8971_ROUTM1, 7, 1, 0), | |
229 | SOC_DAPM_SINGLE("Playback Switch", WM8971_ROUTM2, 8, 1, 0), | |
230 | SOC_DAPM_SINGLE("Right Bypass Switch", WM8971_ROUTM2, 7, 1, 0), | |
231 | }; | |
232 | ||
233 | /* Mono Mixer */ | |
234 | static const struct snd_kcontrol_new wm8971_mono_mixer_controls[] = { | |
235 | SOC_DAPM_SINGLE("Left Playback Switch", WM8971_MOUTM1, 8, 1, 0), | |
236 | SOC_DAPM_SINGLE("Left Bypass Switch", WM8971_MOUTM1, 7, 1, 0), | |
237 | SOC_DAPM_SINGLE("Right Playback Switch", WM8971_MOUTM2, 8, 1, 0), | |
238 | SOC_DAPM_SINGLE("Right Bypass Switch", WM8971_MOUTM2, 7, 1, 0), | |
239 | }; | |
240 | ||
241 | /* Left Line Mux */ | |
242 | static const struct snd_kcontrol_new wm8971_left_line_controls = | |
243 | SOC_DAPM_ENUM("Route", wm8971_enum[8]); | |
244 | ||
245 | /* Right Line Mux */ | |
246 | static const struct snd_kcontrol_new wm8971_right_line_controls = | |
247 | SOC_DAPM_ENUM("Route", wm8971_enum[9]); | |
248 | ||
249 | /* Left PGA Mux */ | |
250 | static const struct snd_kcontrol_new wm8971_left_pga_controls = | |
251 | SOC_DAPM_ENUM("Route", wm8971_enum[10]); | |
252 | ||
253 | /* Right PGA Mux */ | |
254 | static const struct snd_kcontrol_new wm8971_right_pga_controls = | |
255 | SOC_DAPM_ENUM("Route", wm8971_enum[11]); | |
256 | ||
257 | /* Mono ADC Mux */ | |
258 | static const struct snd_kcontrol_new wm8971_monomux_controls = | |
259 | SOC_DAPM_ENUM("Route", wm8971_enum[13]); | |
260 | ||
261 | static const struct snd_soc_dapm_widget wm8971_dapm_widgets[] = { | |
262 | SND_SOC_DAPM_MIXER("Left Mixer", SND_SOC_NOPM, 0, 0, | |
263 | &wm8971_left_mixer_controls[0], | |
264 | ARRAY_SIZE(wm8971_left_mixer_controls)), | |
265 | SND_SOC_DAPM_MIXER("Right Mixer", SND_SOC_NOPM, 0, 0, | |
266 | &wm8971_right_mixer_controls[0], | |
267 | ARRAY_SIZE(wm8971_right_mixer_controls)), | |
268 | SND_SOC_DAPM_MIXER("Mono Mixer", WM8971_PWR2, 2, 0, | |
269 | &wm8971_mono_mixer_controls[0], | |
270 | ARRAY_SIZE(wm8971_mono_mixer_controls)), | |
271 | ||
272 | SND_SOC_DAPM_PGA("Right Out 2", WM8971_PWR2, 3, 0, NULL, 0), | |
273 | SND_SOC_DAPM_PGA("Left Out 2", WM8971_PWR2, 4, 0, NULL, 0), | |
274 | SND_SOC_DAPM_PGA("Right Out 1", WM8971_PWR2, 5, 0, NULL, 0), | |
275 | SND_SOC_DAPM_PGA("Left Out 1", WM8971_PWR2, 6, 0, NULL, 0), | |
276 | SND_SOC_DAPM_DAC("Right DAC", "Right Playback", WM8971_PWR2, 7, 0), | |
277 | SND_SOC_DAPM_DAC("Left DAC", "Left Playback", WM8971_PWR2, 8, 0), | |
278 | SND_SOC_DAPM_PGA("Mono Out 1", WM8971_PWR2, 2, 0, NULL, 0), | |
279 | ||
280 | SND_SOC_DAPM_MICBIAS("Mic Bias", WM8971_PWR1, 1, 0), | |
281 | SND_SOC_DAPM_ADC("Right ADC", "Right Capture", WM8971_PWR1, 2, 0), | |
282 | SND_SOC_DAPM_ADC("Left ADC", "Left Capture", WM8971_PWR1, 3, 0), | |
283 | ||
284 | SND_SOC_DAPM_MUX("Left PGA Mux", WM8971_PWR1, 5, 0, | |
285 | &wm8971_left_pga_controls), | |
286 | SND_SOC_DAPM_MUX("Right PGA Mux", WM8971_PWR1, 4, 0, | |
287 | &wm8971_right_pga_controls), | |
288 | SND_SOC_DAPM_MUX("Left Line Mux", SND_SOC_NOPM, 0, 0, | |
289 | &wm8971_left_line_controls), | |
290 | SND_SOC_DAPM_MUX("Right Line Mux", SND_SOC_NOPM, 0, 0, | |
291 | &wm8971_right_line_controls), | |
292 | ||
293 | SND_SOC_DAPM_MUX("Left ADC Mux", SND_SOC_NOPM, 0, 0, | |
294 | &wm8971_monomux_controls), | |
295 | SND_SOC_DAPM_MUX("Right ADC Mux", SND_SOC_NOPM, 0, 0, | |
296 | &wm8971_monomux_controls), | |
297 | ||
298 | SND_SOC_DAPM_OUTPUT("LOUT1"), | |
299 | SND_SOC_DAPM_OUTPUT("ROUT1"), | |
300 | SND_SOC_DAPM_OUTPUT("LOUT2"), | |
301 | SND_SOC_DAPM_OUTPUT("ROUT2"), | |
302 | SND_SOC_DAPM_OUTPUT("MONO"), | |
303 | ||
304 | SND_SOC_DAPM_INPUT("LINPUT1"), | |
305 | SND_SOC_DAPM_INPUT("RINPUT1"), | |
306 | SND_SOC_DAPM_INPUT("MIC"), | |
307 | }; | |
308 | ||
309 | static const struct snd_soc_dapm_route audio_map[] = { | |
310 | /* left mixer */ | |
311 | {"Left Mixer", "Playback Switch", "Left DAC"}, | |
312 | {"Left Mixer", "Left Bypass Switch", "Left Line Mux"}, | |
313 | {"Left Mixer", "Right Playback Switch", "Right DAC"}, | |
314 | {"Left Mixer", "Right Bypass Switch", "Right Line Mux"}, | |
315 | ||
316 | /* right mixer */ | |
317 | {"Right Mixer", "Left Playback Switch", "Left DAC"}, | |
318 | {"Right Mixer", "Left Bypass Switch", "Left Line Mux"}, | |
319 | {"Right Mixer", "Playback Switch", "Right DAC"}, | |
320 | {"Right Mixer", "Right Bypass Switch", "Right Line Mux"}, | |
321 | ||
322 | /* left out 1 */ | |
323 | {"Left Out 1", NULL, "Left Mixer"}, | |
324 | {"LOUT1", NULL, "Left Out 1"}, | |
325 | ||
326 | /* left out 2 */ | |
327 | {"Left Out 2", NULL, "Left Mixer"}, | |
328 | {"LOUT2", NULL, "Left Out 2"}, | |
329 | ||
330 | /* right out 1 */ | |
331 | {"Right Out 1", NULL, "Right Mixer"}, | |
332 | {"ROUT1", NULL, "Right Out 1"}, | |
333 | ||
334 | /* right out 2 */ | |
335 | {"Right Out 2", NULL, "Right Mixer"}, | |
336 | {"ROUT2", NULL, "Right Out 2"}, | |
337 | ||
338 | /* mono mixer */ | |
339 | {"Mono Mixer", "Left Playback Switch", "Left DAC"}, | |
340 | {"Mono Mixer", "Left Bypass Switch", "Left Line Mux"}, | |
341 | {"Mono Mixer", "Right Playback Switch", "Right DAC"}, | |
342 | {"Mono Mixer", "Right Bypass Switch", "Right Line Mux"}, | |
343 | ||
344 | /* mono out */ | |
345 | {"Mono Out", NULL, "Mono Mixer"}, | |
346 | {"MONO1", NULL, "Mono Out"}, | |
347 | ||
348 | /* Left Line Mux */ | |
349 | {"Left Line Mux", "Line", "LINPUT1"}, | |
350 | {"Left Line Mux", "PGA", "Left PGA Mux"}, | |
351 | {"Left Line Mux", "Differential", "Differential Mux"}, | |
352 | ||
353 | /* Right Line Mux */ | |
354 | {"Right Line Mux", "Line", "RINPUT1"}, | |
355 | {"Right Line Mux", "Mic", "MIC"}, | |
356 | {"Right Line Mux", "PGA", "Right PGA Mux"}, | |
357 | {"Right Line Mux", "Differential", "Differential Mux"}, | |
358 | ||
359 | /* Left PGA Mux */ | |
360 | {"Left PGA Mux", "Line", "LINPUT1"}, | |
361 | {"Left PGA Mux", "Differential", "Differential Mux"}, | |
362 | ||
363 | /* Right PGA Mux */ | |
364 | {"Right PGA Mux", "Line", "RINPUT1"}, | |
365 | {"Right PGA Mux", "Differential", "Differential Mux"}, | |
366 | ||
367 | /* Differential Mux */ | |
368 | {"Differential Mux", "Line", "LINPUT1"}, | |
369 | {"Differential Mux", "Line", "RINPUT1"}, | |
370 | ||
371 | /* Left ADC Mux */ | |
372 | {"Left ADC Mux", "Stereo", "Left PGA Mux"}, | |
373 | {"Left ADC Mux", "Mono (Left)", "Left PGA Mux"}, | |
374 | {"Left ADC Mux", "Digital Mono", "Left PGA Mux"}, | |
375 | ||
376 | /* Right ADC Mux */ | |
377 | {"Right ADC Mux", "Stereo", "Right PGA Mux"}, | |
378 | {"Right ADC Mux", "Mono (Right)", "Right PGA Mux"}, | |
379 | {"Right ADC Mux", "Digital Mono", "Right PGA Mux"}, | |
380 | ||
381 | /* ADC */ | |
382 | {"Left ADC", NULL, "Left ADC Mux"}, | |
383 | {"Right ADC", NULL, "Right ADC Mux"}, | |
384 | }; | |
385 | ||
386 | static int wm8971_add_widgets(struct snd_soc_codec *codec) | |
387 | { | |
388 | snd_soc_dapm_new_controls(codec, wm8971_dapm_widgets, | |
389 | ARRAY_SIZE(wm8971_dapm_widgets)); | |
390 | ||
391 | snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); | |
392 | ||
393 | snd_soc_dapm_new_widgets(codec); | |
394 | ||
395 | return 0; | |
396 | } | |
397 | ||
398 | struct _coeff_div { | |
399 | u32 mclk; | |
400 | u32 rate; | |
401 | u16 fs; | |
402 | u8 sr:5; | |
403 | u8 usb:1; | |
404 | }; | |
405 | ||
406 | /* codec hifi mclk clock divider coefficients */ | |
407 | static const struct _coeff_div coeff_div[] = { | |
408 | /* 8k */ | |
409 | {12288000, 8000, 1536, 0x6, 0x0}, | |
410 | {11289600, 8000, 1408, 0x16, 0x0}, | |
411 | {18432000, 8000, 2304, 0x7, 0x0}, | |
412 | {16934400, 8000, 2112, 0x17, 0x0}, | |
413 | {12000000, 8000, 1500, 0x6, 0x1}, | |
414 | ||
415 | /* 11.025k */ | |
416 | {11289600, 11025, 1024, 0x18, 0x0}, | |
417 | {16934400, 11025, 1536, 0x19, 0x0}, | |
418 | {12000000, 11025, 1088, 0x19, 0x1}, | |
419 | ||
420 | /* 16k */ | |
421 | {12288000, 16000, 768, 0xa, 0x0}, | |
422 | {18432000, 16000, 1152, 0xb, 0x0}, | |
423 | {12000000, 16000, 750, 0xa, 0x1}, | |
424 | ||
425 | /* 22.05k */ | |
426 | {11289600, 22050, 512, 0x1a, 0x0}, | |
427 | {16934400, 22050, 768, 0x1b, 0x0}, | |
428 | {12000000, 22050, 544, 0x1b, 0x1}, | |
429 | ||
430 | /* 32k */ | |
431 | {12288000, 32000, 384, 0xc, 0x0}, | |
432 | {18432000, 32000, 576, 0xd, 0x0}, | |
433 | {12000000, 32000, 375, 0xa, 0x1}, | |
434 | ||
435 | /* 44.1k */ | |
436 | {11289600, 44100, 256, 0x10, 0x0}, | |
437 | {16934400, 44100, 384, 0x11, 0x0}, | |
438 | {12000000, 44100, 272, 0x11, 0x1}, | |
439 | ||
440 | /* 48k */ | |
441 | {12288000, 48000, 256, 0x0, 0x0}, | |
442 | {18432000, 48000, 384, 0x1, 0x0}, | |
443 | {12000000, 48000, 250, 0x0, 0x1}, | |
444 | ||
445 | /* 88.2k */ | |
446 | {11289600, 88200, 128, 0x1e, 0x0}, | |
447 | {16934400, 88200, 192, 0x1f, 0x0}, | |
448 | {12000000, 88200, 136, 0x1f, 0x1}, | |
449 | ||
450 | /* 96k */ | |
451 | {12288000, 96000, 128, 0xe, 0x0}, | |
452 | {18432000, 96000, 192, 0xf, 0x0}, | |
453 | {12000000, 96000, 125, 0xe, 0x1}, | |
454 | }; | |
455 | ||
456 | static int get_coeff(int mclk, int rate) | |
457 | { | |
458 | int i; | |
459 | ||
460 | for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { | |
461 | if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) | |
462 | return i; | |
463 | } | |
464 | return -EINVAL; | |
465 | } | |
466 | ||
467 | static int wm8971_set_dai_sysclk(struct snd_soc_dai *codec_dai, | |
468 | int clk_id, unsigned int freq, int dir) | |
469 | { | |
470 | struct snd_soc_codec *codec = codec_dai->codec; | |
471 | struct wm8971_priv *wm8971 = codec->private_data; | |
472 | ||
473 | switch (freq) { | |
474 | case 11289600: | |
475 | case 12000000: | |
476 | case 12288000: | |
477 | case 16934400: | |
478 | case 18432000: | |
479 | wm8971->sysclk = freq; | |
480 | return 0; | |
481 | } | |
482 | return -EINVAL; | |
483 | } | |
484 | ||
485 | static int wm8971_set_dai_fmt(struct snd_soc_dai *codec_dai, | |
486 | unsigned int fmt) | |
487 | { | |
488 | struct snd_soc_codec *codec = codec_dai->codec; | |
489 | u16 iface = 0; | |
490 | ||
491 | /* set master/slave audio interface */ | |
492 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
493 | case SND_SOC_DAIFMT_CBM_CFM: | |
494 | iface = 0x0040; | |
495 | break; | |
496 | case SND_SOC_DAIFMT_CBS_CFS: | |
497 | break; | |
498 | default: | |
499 | return -EINVAL; | |
500 | } | |
501 | ||
502 | /* interface format */ | |
503 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
504 | case SND_SOC_DAIFMT_I2S: | |
505 | iface |= 0x0002; | |
506 | break; | |
507 | case SND_SOC_DAIFMT_RIGHT_J: | |
508 | break; | |
509 | case SND_SOC_DAIFMT_LEFT_J: | |
510 | iface |= 0x0001; | |
511 | break; | |
512 | case SND_SOC_DAIFMT_DSP_A: | |
513 | iface |= 0x0003; | |
514 | break; | |
515 | case SND_SOC_DAIFMT_DSP_B: | |
516 | iface |= 0x0013; | |
517 | break; | |
518 | default: | |
519 | return -EINVAL; | |
520 | } | |
521 | ||
522 | /* clock inversion */ | |
523 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
524 | case SND_SOC_DAIFMT_NB_NF: | |
525 | break; | |
526 | case SND_SOC_DAIFMT_IB_IF: | |
527 | iface |= 0x0090; | |
528 | break; | |
529 | case SND_SOC_DAIFMT_IB_NF: | |
530 | iface |= 0x0080; | |
531 | break; | |
532 | case SND_SOC_DAIFMT_NB_IF: | |
533 | iface |= 0x0010; | |
534 | break; | |
535 | default: | |
536 | return -EINVAL; | |
537 | } | |
538 | ||
539 | wm8971_write(codec, WM8971_IFACE, iface); | |
540 | return 0; | |
541 | } | |
542 | ||
543 | static int wm8971_pcm_hw_params(struct snd_pcm_substream *substream, | |
dee89c4d MB |
544 | struct snd_pcm_hw_params *params, |
545 | struct snd_soc_dai *dai) | |
8bae3e23 KK |
546 | { |
547 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
548 | struct snd_soc_device *socdev = rtd->socdev; | |
549 | struct snd_soc_codec *codec = socdev->codec; | |
550 | struct wm8971_priv *wm8971 = codec->private_data; | |
551 | u16 iface = wm8971_read_reg_cache(codec, WM8971_IFACE) & 0x1f3; | |
552 | u16 srate = wm8971_read_reg_cache(codec, WM8971_SRATE) & 0x1c0; | |
553 | int coeff = get_coeff(wm8971->sysclk, params_rate(params)); | |
554 | ||
555 | /* bit size */ | |
556 | switch (params_format(params)) { | |
557 | case SNDRV_PCM_FORMAT_S16_LE: | |
558 | break; | |
559 | case SNDRV_PCM_FORMAT_S20_3LE: | |
560 | iface |= 0x0004; | |
561 | break; | |
562 | case SNDRV_PCM_FORMAT_S24_LE: | |
563 | iface |= 0x0008; | |
564 | break; | |
565 | case SNDRV_PCM_FORMAT_S32_LE: | |
566 | iface |= 0x000c; | |
567 | break; | |
568 | } | |
569 | ||
570 | /* set iface & srate */ | |
571 | wm8971_write(codec, WM8971_IFACE, iface); | |
572 | if (coeff >= 0) | |
573 | wm8971_write(codec, WM8971_SRATE, srate | | |
574 | (coeff_div[coeff].sr << 1) | coeff_div[coeff].usb); | |
575 | ||
576 | return 0; | |
577 | } | |
578 | ||
579 | static int wm8971_mute(struct snd_soc_dai *dai, int mute) | |
580 | { | |
581 | struct snd_soc_codec *codec = dai->codec; | |
582 | u16 mute_reg = wm8971_read_reg_cache(codec, WM8971_ADCDAC) & 0xfff7; | |
583 | ||
584 | if (mute) | |
585 | wm8971_write(codec, WM8971_ADCDAC, mute_reg | 0x8); | |
586 | else | |
587 | wm8971_write(codec, WM8971_ADCDAC, mute_reg); | |
588 | return 0; | |
589 | } | |
590 | ||
591 | static int wm8971_set_bias_level(struct snd_soc_codec *codec, | |
592 | enum snd_soc_bias_level level) | |
593 | { | |
594 | u16 pwr_reg = wm8971_read_reg_cache(codec, WM8971_PWR1) & 0xfe3e; | |
595 | ||
596 | switch (level) { | |
597 | case SND_SOC_BIAS_ON: | |
598 | /* set vmid to 50k and unmute dac */ | |
599 | wm8971_write(codec, WM8971_PWR1, pwr_reg | 0x00c1); | |
600 | break; | |
601 | case SND_SOC_BIAS_PREPARE: | |
602 | break; | |
603 | case SND_SOC_BIAS_STANDBY: | |
604 | /* mute dac and set vmid to 500k, enable VREF */ | |
605 | wm8971_write(codec, WM8971_PWR1, pwr_reg | 0x0140); | |
606 | break; | |
607 | case SND_SOC_BIAS_OFF: | |
608 | wm8971_write(codec, WM8971_PWR1, 0x0001); | |
609 | break; | |
610 | } | |
611 | codec->bias_level = level; | |
612 | return 0; | |
613 | } | |
614 | ||
615 | #define WM8971_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ | |
616 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \ | |
617 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000) | |
618 | ||
619 | #define WM8971_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ | |
620 | SNDRV_PCM_FMTBIT_S24_LE) | |
621 | ||
622 | struct snd_soc_dai wm8971_dai = { | |
623 | .name = "WM8971", | |
624 | .playback = { | |
625 | .stream_name = "Playback", | |
626 | .channels_min = 1, | |
627 | .channels_max = 2, | |
628 | .rates = WM8971_RATES, | |
629 | .formats = WM8971_FORMATS,}, | |
630 | .capture = { | |
631 | .stream_name = "Capture", | |
632 | .channels_min = 1, | |
633 | .channels_max = 2, | |
634 | .rates = WM8971_RATES, | |
635 | .formats = WM8971_FORMATS,}, | |
636 | .ops = { | |
637 | .hw_params = wm8971_pcm_hw_params, | |
8bae3e23 KK |
638 | .digital_mute = wm8971_mute, |
639 | .set_fmt = wm8971_set_dai_fmt, | |
640 | .set_sysclk = wm8971_set_dai_sysclk, | |
641 | }, | |
642 | }; | |
643 | EXPORT_SYMBOL_GPL(wm8971_dai); | |
644 | ||
645 | static void wm8971_work(struct work_struct *work) | |
646 | { | |
647 | struct snd_soc_codec *codec = | |
648 | container_of(work, struct snd_soc_codec, delayed_work.work); | |
649 | wm8971_set_bias_level(codec, codec->bias_level); | |
650 | } | |
651 | ||
652 | static int wm8971_suspend(struct platform_device *pdev, pm_message_t state) | |
653 | { | |
654 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
655 | struct snd_soc_codec *codec = socdev->codec; | |
656 | ||
657 | wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF); | |
658 | return 0; | |
659 | } | |
660 | ||
661 | static int wm8971_resume(struct platform_device *pdev) | |
662 | { | |
663 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
664 | struct snd_soc_codec *codec = socdev->codec; | |
665 | int i; | |
666 | u8 data[2]; | |
667 | u16 *cache = codec->reg_cache; | |
668 | u16 reg; | |
669 | ||
670 | /* Sync reg_cache with the hardware */ | |
671 | for (i = 0; i < ARRAY_SIZE(wm8971_reg); i++) { | |
672 | if (i + 1 == WM8971_RESET) | |
673 | continue; | |
674 | data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); | |
675 | data[1] = cache[i] & 0x00ff; | |
676 | codec->hw_write(codec->control_data, data, 2); | |
677 | } | |
678 | ||
679 | wm8971_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
680 | ||
681 | /* charge wm8971 caps */ | |
682 | if (codec->suspend_bias_level == SND_SOC_BIAS_ON) { | |
683 | reg = wm8971_read_reg_cache(codec, WM8971_PWR1) & 0xfe3e; | |
684 | wm8971_write(codec, WM8971_PWR1, reg | 0x01c0); | |
685 | codec->bias_level = SND_SOC_BIAS_ON; | |
686 | queue_delayed_work(wm8971_workq, &codec->delayed_work, | |
687 | msecs_to_jiffies(1000)); | |
688 | } | |
689 | ||
690 | return 0; | |
691 | } | |
692 | ||
693 | static int wm8971_init(struct snd_soc_device *socdev) | |
694 | { | |
695 | struct snd_soc_codec *codec = socdev->codec; | |
696 | int reg, ret = 0; | |
697 | ||
698 | codec->name = "WM8971"; | |
699 | codec->owner = THIS_MODULE; | |
700 | codec->read = wm8971_read_reg_cache; | |
701 | codec->write = wm8971_write; | |
702 | codec->set_bias_level = wm8971_set_bias_level; | |
703 | codec->dai = &wm8971_dai; | |
704 | codec->reg_cache_size = ARRAY_SIZE(wm8971_reg); | |
705 | codec->num_dai = 1; | |
706 | codec->reg_cache = kmemdup(wm8971_reg, sizeof(wm8971_reg), GFP_KERNEL); | |
707 | ||
708 | if (codec->reg_cache == NULL) | |
709 | return -ENOMEM; | |
710 | ||
711 | wm8971_reset(codec); | |
712 | ||
713 | /* register pcms */ | |
714 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
715 | if (ret < 0) { | |
716 | printk(KERN_ERR "wm8971: failed to create pcms\n"); | |
717 | goto pcm_err; | |
718 | } | |
719 | ||
720 | /* charge output caps - set vmid to 5k for quick power up */ | |
721 | reg = wm8971_read_reg_cache(codec, WM8971_PWR1) & 0xfe3e; | |
722 | wm8971_write(codec, WM8971_PWR1, reg | 0x01c0); | |
723 | codec->bias_level = SND_SOC_BIAS_STANDBY; | |
724 | queue_delayed_work(wm8971_workq, &codec->delayed_work, | |
725 | msecs_to_jiffies(1000)); | |
726 | ||
727 | /* set the update bits */ | |
728 | reg = wm8971_read_reg_cache(codec, WM8971_LDAC); | |
729 | wm8971_write(codec, WM8971_LDAC, reg | 0x0100); | |
730 | reg = wm8971_read_reg_cache(codec, WM8971_RDAC); | |
731 | wm8971_write(codec, WM8971_RDAC, reg | 0x0100); | |
732 | ||
733 | reg = wm8971_read_reg_cache(codec, WM8971_LOUT1V); | |
734 | wm8971_write(codec, WM8971_LOUT1V, reg | 0x0100); | |
735 | reg = wm8971_read_reg_cache(codec, WM8971_ROUT1V); | |
736 | wm8971_write(codec, WM8971_ROUT1V, reg | 0x0100); | |
737 | ||
738 | reg = wm8971_read_reg_cache(codec, WM8971_LOUT2V); | |
739 | wm8971_write(codec, WM8971_LOUT2V, reg | 0x0100); | |
740 | reg = wm8971_read_reg_cache(codec, WM8971_ROUT2V); | |
741 | wm8971_write(codec, WM8971_ROUT2V, reg | 0x0100); | |
742 | ||
743 | reg = wm8971_read_reg_cache(codec, WM8971_LINVOL); | |
744 | wm8971_write(codec, WM8971_LINVOL, reg | 0x0100); | |
745 | reg = wm8971_read_reg_cache(codec, WM8971_RINVOL); | |
746 | wm8971_write(codec, WM8971_RINVOL, reg | 0x0100); | |
747 | ||
748 | wm8971_add_controls(codec); | |
749 | wm8971_add_widgets(codec); | |
968a6025 | 750 | ret = snd_soc_init_card(socdev); |
8bae3e23 KK |
751 | if (ret < 0) { |
752 | printk(KERN_ERR "wm8971: failed to register card\n"); | |
753 | goto card_err; | |
754 | } | |
755 | return ret; | |
756 | ||
757 | card_err: | |
758 | snd_soc_free_pcms(socdev); | |
759 | snd_soc_dapm_free(socdev); | |
760 | pcm_err: | |
761 | kfree(codec->reg_cache); | |
762 | return ret; | |
763 | } | |
764 | ||
765 | /* If the i2c layer weren't so broken, we could pass this kind of data | |
766 | around */ | |
767 | static struct snd_soc_device *wm8971_socdev; | |
768 | ||
769 | #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE) | |
770 | ||
771 | static int wm8971_i2c_probe(struct i2c_client *i2c, | |
772 | const struct i2c_device_id *id) | |
773 | { | |
774 | struct snd_soc_device *socdev = wm8971_socdev; | |
775 | struct snd_soc_codec *codec = socdev->codec; | |
776 | int ret; | |
777 | ||
778 | i2c_set_clientdata(i2c, codec); | |
779 | ||
780 | codec->control_data = i2c; | |
781 | ||
782 | ret = wm8971_init(socdev); | |
783 | if (ret < 0) | |
784 | pr_err("failed to initialise WM8971\n"); | |
785 | ||
786 | return ret; | |
787 | } | |
788 | ||
789 | static int wm8971_i2c_remove(struct i2c_client *client) | |
790 | { | |
791 | struct snd_soc_codec *codec = i2c_get_clientdata(client); | |
792 | kfree(codec->reg_cache); | |
793 | return 0; | |
794 | } | |
795 | ||
796 | static const struct i2c_device_id wm8971_i2c_id[] = { | |
797 | { "wm8971", 0 }, | |
798 | { } | |
799 | }; | |
800 | MODULE_DEVICE_TABLE(i2c, wm8971_i2c_id); | |
801 | ||
802 | static struct i2c_driver wm8971_i2c_driver = { | |
803 | .driver = { | |
804 | .name = "WM8971 I2C Codec", | |
805 | .owner = THIS_MODULE, | |
806 | }, | |
807 | .probe = wm8971_i2c_probe, | |
808 | .remove = wm8971_i2c_remove, | |
809 | .id_table = wm8971_i2c_id, | |
810 | }; | |
811 | ||
812 | static int wm8971_add_i2c_device(struct platform_device *pdev, | |
813 | const struct wm8971_setup_data *setup) | |
814 | { | |
815 | struct i2c_board_info info; | |
816 | struct i2c_adapter *adapter; | |
817 | struct i2c_client *client; | |
818 | int ret; | |
819 | ||
820 | ret = i2c_add_driver(&wm8971_i2c_driver); | |
821 | if (ret != 0) { | |
822 | dev_err(&pdev->dev, "can't add i2c driver\n"); | |
823 | return ret; | |
824 | } | |
825 | ||
826 | memset(&info, 0, sizeof(struct i2c_board_info)); | |
827 | info.addr = setup->i2c_address; | |
828 | strlcpy(info.type, "wm8971", I2C_NAME_SIZE); | |
829 | ||
830 | adapter = i2c_get_adapter(setup->i2c_bus); | |
831 | if (!adapter) { | |
832 | dev_err(&pdev->dev, "can't get i2c adapter %d\n", | |
833 | setup->i2c_bus); | |
834 | goto err_driver; | |
835 | } | |
836 | ||
837 | client = i2c_new_device(adapter, &info); | |
838 | i2c_put_adapter(adapter); | |
839 | if (!client) { | |
840 | dev_err(&pdev->dev, "can't add i2c device at 0x%x\n", | |
841 | (unsigned int)info.addr); | |
842 | goto err_driver; | |
843 | } | |
844 | ||
845 | return 0; | |
846 | ||
847 | err_driver: | |
848 | i2c_del_driver(&wm8971_i2c_driver); | |
849 | return -ENODEV; | |
850 | } | |
851 | ||
852 | #endif | |
853 | ||
854 | static int wm8971_probe(struct platform_device *pdev) | |
855 | { | |
856 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
857 | struct wm8971_setup_data *setup; | |
858 | struct snd_soc_codec *codec; | |
859 | struct wm8971_priv *wm8971; | |
860 | int ret = 0; | |
861 | ||
862 | pr_info("WM8971 Audio Codec %s", WM8971_VERSION); | |
863 | ||
864 | setup = socdev->codec_data; | |
865 | codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); | |
866 | if (codec == NULL) | |
867 | return -ENOMEM; | |
868 | ||
869 | wm8971 = kzalloc(sizeof(struct wm8971_priv), GFP_KERNEL); | |
870 | if (wm8971 == NULL) { | |
871 | kfree(codec); | |
872 | return -ENOMEM; | |
873 | } | |
874 | ||
875 | codec->private_data = wm8971; | |
876 | socdev->codec = codec; | |
877 | mutex_init(&codec->mutex); | |
878 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
879 | INIT_LIST_HEAD(&codec->dapm_paths); | |
880 | wm8971_socdev = socdev; | |
881 | ||
882 | INIT_DELAYED_WORK(&codec->delayed_work, wm8971_work); | |
883 | wm8971_workq = create_workqueue("wm8971"); | |
884 | if (wm8971_workq == NULL) { | |
885 | kfree(codec->private_data); | |
886 | kfree(codec); | |
887 | return -ENOMEM; | |
888 | } | |
889 | ||
890 | #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE) | |
891 | if (setup->i2c_address) { | |
892 | codec->hw_write = (hw_write_t)i2c_master_send; | |
893 | ret = wm8971_add_i2c_device(pdev, setup); | |
894 | } | |
895 | #endif | |
896 | /* Add other interfaces here */ | |
897 | ||
898 | if (ret != 0) { | |
899 | destroy_workqueue(wm8971_workq); | |
900 | kfree(codec->private_data); | |
901 | kfree(codec); | |
902 | } | |
903 | ||
904 | return ret; | |
905 | } | |
906 | ||
907 | /* power down chip */ | |
908 | static int wm8971_remove(struct platform_device *pdev) | |
909 | { | |
910 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
911 | struct snd_soc_codec *codec = socdev->codec; | |
912 | ||
913 | if (codec->control_data) | |
914 | wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF); | |
915 | if (wm8971_workq) | |
916 | destroy_workqueue(wm8971_workq); | |
917 | snd_soc_free_pcms(socdev); | |
918 | snd_soc_dapm_free(socdev); | |
919 | #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE) | |
920 | i2c_unregister_device(codec->control_data); | |
921 | i2c_del_driver(&wm8971_i2c_driver); | |
922 | #endif | |
923 | kfree(codec->private_data); | |
924 | kfree(codec); | |
925 | ||
926 | return 0; | |
927 | } | |
928 | ||
929 | struct snd_soc_codec_device soc_codec_dev_wm8971 = { | |
930 | .probe = wm8971_probe, | |
931 | .remove = wm8971_remove, | |
932 | .suspend = wm8971_suspend, | |
933 | .resume = wm8971_resume, | |
934 | }; | |
935 | ||
936 | EXPORT_SYMBOL_GPL(soc_codec_dev_wm8971); | |
937 | ||
938 | MODULE_DESCRIPTION("ASoC WM8971 driver"); | |
939 | MODULE_AUTHOR("Lab126"); | |
940 | MODULE_LICENSE("GPL"); |