?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / sound / soc / codecs / wm8961.c
blobcdee8103d09b323efebfee47497d87dbe525f8ac
1 /*
2 * wm8961.c -- WM8961 ALSA SoC Audio driver
3 *
4 * Author: Mark Brown
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * Currently unimplemented features:
11 * - ALC
12 */
13
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/init.h>
17 #include <linux/delay.h>
18 #include <linux/pm.h>
19 #include <linux/i2c.h>
20 #include <linux/platform_device.h>
21 #include <linux/slab.h>
22 #include <sound/core.h>
23 #include <sound/pcm.h>
24 #include <sound/pcm_params.h>
25 #include <sound/soc.h>
26 #include <sound/initval.h>
27 #include <sound/tlv.h>
28
29 #include "wm8961.h"
30
31 #define WM8961_MAX_REGISTER 0xFC
32
33 static u16 wm8961_reg_defaults[] = {
34 0x009F, /* R0 - Left Input volume */
35 0x009F, /* R1 - Right Input volume */
36 0x0000, /* R2 - LOUT1 volume */
37 0x0000, /* R3 - ROUT1 volume */
38 0x0020, /* R4 - Clocking1 */
39 0x0008, /* R5 - ADC & DAC Control 1 */
40 0x0000, /* R6 - ADC & DAC Control 2 */
41 0x000A, /* R7 - Audio Interface 0 */
42 0x01F4, /* R8 - Clocking2 */
43 0x0000, /* R9 - Audio Interface 1 */
44 0x00FF, /* R10 - Left DAC volume */
45 0x00FF, /* R11 - Right DAC volume */
46 0x0000, /* R12 */
47 0x0000, /* R13 */
48 0x0040, /* R14 - Audio Interface 2 */
49 0x0000, /* R15 - Software Reset */
50 0x0000, /* R16 */
51 0x007B, /* R17 - ALC1 */
52 0x0000, /* R18 - ALC2 */
53 0x0032, /* R19 - ALC3 */
54 0x0000, /* R20 - Noise Gate */
55 0x00C0, /* R21 - Left ADC volume */
56 0x00C0, /* R22 - Right ADC volume */
57 0x0120, /* R23 - Additional control(1) */
58 0x0000, /* R24 - Additional control(2) */
59 0x0000, /* R25 - Pwr Mgmt (1) */
60 0x0000, /* R26 - Pwr Mgmt (2) */
61 0x0000, /* R27 - Additional Control (3) */
62 0x0000, /* R28 - Anti-pop */
63 0x0000, /* R29 */
64 0x005F, /* R30 - Clocking 3 */
65 0x0000, /* R31 */
66 0x0000, /* R32 - ADCL signal path */
67 0x0000, /* R33 - ADCR signal path */
68 0x0000, /* R34 */
69 0x0000, /* R35 */
70 0x0000, /* R36 */
71 0x0000, /* R37 */
72 0x0000, /* R38 */
73 0x0000, /* R39 */
74 0x0000, /* R40 - LOUT2 volume */
75 0x0000, /* R41 - ROUT2 volume */
76 0x0000, /* R42 */
77 0x0000, /* R43 */
78 0x0000, /* R44 */
79 0x0000, /* R45 */
80 0x0000, /* R46 */
81 0x0000, /* R47 - Pwr Mgmt (3) */
82 0x0023, /* R48 - Additional Control (4) */
83 0x0000, /* R49 - Class D Control 1 */
84 0x0000, /* R50 */
85 0x0003, /* R51 - Class D Control 2 */
86 0x0000, /* R52 */
87 0x0000, /* R53 */
88 0x0000, /* R54 */
89 0x0000, /* R55 */
90 0x0106, /* R56 - Clocking 4 */
91 0x0000, /* R57 - DSP Sidetone 0 */
92 0x0000, /* R58 - DSP Sidetone 1 */
93 0x0000, /* R59 */
94 0x0000, /* R60 - DC Servo 0 */
95 0x0000, /* R61 - DC Servo 1 */
96 0x0000, /* R62 */
97 0x015E, /* R63 - DC Servo 3 */
98 0x0010, /* R64 */
99 0x0010, /* R65 - DC Servo 5 */
100 0x0000, /* R66 */
101 0x0001, /* R67 */
102 0x0003, /* R68 - Analogue PGA Bias */
103 0x0000, /* R69 - Analogue HP 0 */
104 0x0060, /* R70 */
105 0x01FB, /* R71 - Analogue HP 2 */
106 0x0000, /* R72 - Charge Pump 1 */
107 0x0065, /* R73 */
108 0x005F, /* R74 */
109 0x0059, /* R75 */
110 0x006B, /* R76 */
111 0x0038, /* R77 */
112 0x000C, /* R78 */
113 0x000A, /* R79 */
114 0x006B, /* R80 */
115 0x0000, /* R81 */
116 0x0000, /* R82 - Charge Pump B */
117 0x0087, /* R83 */
118 0x0000, /* R84 */
119 0x005C, /* R85 */
120 0x0000, /* R86 */
121 0x0000, /* R87 - Write Sequencer 1 */
122 0x0000, /* R88 - Write Sequencer 2 */
123 0x0000, /* R89 - Write Sequencer 3 */
124 0x0000, /* R90 - Write Sequencer 4 */
125 0x0000, /* R91 - Write Sequencer 5 */
126 0x0000, /* R92 - Write Sequencer 6 */
127 0x0000, /* R93 - Write Sequencer 7 */
128 0x0000, /* R94 */
129 0x0000, /* R95 */
130 0x0000, /* R96 */
131 0x0000, /* R97 */
132 0x0000, /* R98 */
133 0x0000, /* R99 */
134 0x0000, /* R100 */
135 0x0000, /* R101 */
136 0x0000, /* R102 */
137 0x0000, /* R103 */
138 0x0000, /* R104 */
139 0x0000, /* R105 */
140 0x0000, /* R106 */
141 0x0000, /* R107 */
142 0x0000, /* R108 */
143 0x0000, /* R109 */
144 0x0000, /* R110 */
145 0x0000, /* R111 */
146 0x0000, /* R112 */
147 0x0000, /* R113 */
148 0x0000, /* R114 */
149 0x0000, /* R115 */
150 0x0000, /* R116 */
151 0x0000, /* R117 */
152 0x0000, /* R118 */
153 0x0000, /* R119 */
154 0x0000, /* R120 */
155 0x0000, /* R121 */
156 0x0000, /* R122 */
157 0x0000, /* R123 */
158 0x0000, /* R124 */
159 0x0000, /* R125 */
160 0x0000, /* R126 */
161 0x0000, /* R127 */
162 0x0000, /* R128 */
163 0x0000, /* R129 */
164 0x0000, /* R130 */
165 0x0000, /* R131 */
166 0x0000, /* R132 */
167 0x0000, /* R133 */
168 0x0000, /* R134 */
169 0x0000, /* R135 */
170 0x0000, /* R136 */
171 0x0000, /* R137 */
172 0x0000, /* R138 */
173 0x0000, /* R139 */
174 0x0000, /* R140 */
175 0x0000, /* R141 */
176 0x0000, /* R142 */
177 0x0000, /* R143 */
178 0x0000, /* R144 */
179 0x0000, /* R145 */
180 0x0000, /* R146 */
181 0x0000, /* R147 */
182 0x0000, /* R148 */
183 0x0000, /* R149 */
184 0x0000, /* R150 */
185 0x0000, /* R151 */
186 0x0000, /* R152 */
187 0x0000, /* R153 */
188 0x0000, /* R154 */
189 0x0000, /* R155 */
190 0x0000, /* R156 */
191 0x0000, /* R157 */
192 0x0000, /* R158 */
193 0x0000, /* R159 */
194 0x0000, /* R160 */
195 0x0000, /* R161 */
196 0x0000, /* R162 */
197 0x0000, /* R163 */
198 0x0000, /* R164 */
199 0x0000, /* R165 */
200 0x0000, /* R166 */
201 0x0000, /* R167 */
202 0x0000, /* R168 */
203 0x0000, /* R169 */
204 0x0000, /* R170 */
205 0x0000, /* R171 */
206 0x0000, /* R172 */
207 0x0000, /* R173 */
208 0x0000, /* R174 */
209 0x0000, /* R175 */
210 0x0000, /* R176 */
211 0x0000, /* R177 */
212 0x0000, /* R178 */
213 0x0000, /* R179 */
214 0x0000, /* R180 */
215 0x0000, /* R181 */
216 0x0000, /* R182 */
217 0x0000, /* R183 */
218 0x0000, /* R184 */
219 0x0000, /* R185 */
220 0x0000, /* R186 */
221 0x0000, /* R187 */
222 0x0000, /* R188 */
223 0x0000, /* R189 */
224 0x0000, /* R190 */
225 0x0000, /* R191 */
226 0x0000, /* R192 */
227 0x0000, /* R193 */
228 0x0000, /* R194 */
229 0x0000, /* R195 */
230 0x0030, /* R196 */
231 0x0006, /* R197 */
232 0x0000, /* R198 */
233 0x0060, /* R199 */
234 0x0000, /* R200 */
235 0x003F, /* R201 */
236 0x0000, /* R202 */
237 0x0000, /* R203 */
238 0x0000, /* R204 */
239 0x0001, /* R205 */
240 0x0000, /* R206 */
241 0x0181, /* R207 */
242 0x0005, /* R208 */
243 0x0008, /* R209 */
244 0x0008, /* R210 */
245 0x0000, /* R211 */
246 0x013B, /* R212 */
247 0x0000, /* R213 */
248 0x0000, /* R214 */
249 0x0000, /* R215 */
250 0x0000, /* R216 */
251 0x0070, /* R217 */
252 0x0000, /* R218 */
253 0x0000, /* R219 */
254 0x0000, /* R220 */
255 0x0000, /* R221 */
256 0x0000, /* R222 */
257 0x0003, /* R223 */
258 0x0000, /* R224 */
259 0x0000, /* R225 */
260 0x0001, /* R226 */
261 0x0008, /* R227 */
262 0x0000, /* R228 */
263 0x0000, /* R229 */
264 0x0000, /* R230 */
265 0x0000, /* R231 */
266 0x0004, /* R232 */
267 0x0000, /* R233 */
268 0x0000, /* R234 */
269 0x0000, /* R235 */
270 0x0000, /* R236 */
271 0x0000, /* R237 */
272 0x0080, /* R238 */
273 0x0000, /* R239 */
274 0x0000, /* R240 */
275 0x0000, /* R241 */
276 0x0000, /* R242 */
277 0x0000, /* R243 */
278 0x0000, /* R244 */
279 0x0052, /* R245 */
280 0x0110, /* R246 */
281 0x0040, /* R247 */
282 0x0000, /* R248 */
283 0x0030, /* R249 */
284 0x0000, /* R250 */
285 0x0000, /* R251 */
286 0x0001, /* R252 - General test 1 */
287 };
288
289 struct wm8961_priv {
290 enum snd_soc_control_type control_type;
291 int sysclk;
292 };
293
294 static int wm8961_volatile_register(struct snd_soc_codec *codec, unsigned int reg)
295 {
296 switch (reg) {
297 case WM8961_SOFTWARE_RESET:
298 case WM8961_WRITE_SEQUENCER_7:
299 case WM8961_DC_SERVO_1:
300 return 1;
301
302 default:
303 return 0;
304 }
305 }
306
307 static int wm8961_reset(struct snd_soc_codec *codec)
308 {
309 return snd_soc_write(codec, WM8961_SOFTWARE_RESET, 0);
310 }
311
312 /*
313 * The headphone output supports special anti-pop sequences giving
314 * silent power up and power down.
315 */
316 static int wm8961_hp_event(struct snd_soc_dapm_widget *w,
317 struct snd_kcontrol *kcontrol, int event)
318 {
319 struct snd_soc_codec *codec = w->codec;
320 u16 hp_reg = snd_soc_read(codec, WM8961_ANALOGUE_HP_0);
321 u16 cp_reg = snd_soc_read(codec, WM8961_CHARGE_PUMP_1);
322 u16 pwr_reg = snd_soc_read(codec, WM8961_PWR_MGMT_2);
323 u16 dcs_reg = snd_soc_read(codec, WM8961_DC_SERVO_1);
324 int timeout = 500;
325
326 if (event & SND_SOC_DAPM_POST_PMU) {
327 /* Make sure the output is shorted */
328 hp_reg &= ~(WM8961_HPR_RMV_SHORT | WM8961_HPL_RMV_SHORT);
329 snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg);
330
331 /* Enable the charge pump */
332 cp_reg |= WM8961_CP_ENA;
333 snd_soc_write(codec, WM8961_CHARGE_PUMP_1, cp_reg);
334 mdelay(5);
335
336 /* Enable the PGA */
337 pwr_reg |= WM8961_LOUT1_PGA | WM8961_ROUT1_PGA;
338 snd_soc_write(codec, WM8961_PWR_MGMT_2, pwr_reg);
339
340 /* Enable the amplifier */
341 hp_reg |= WM8961_HPR_ENA | WM8961_HPL_ENA;
342 snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg);
343
344 /* Second stage enable */
345 hp_reg |= WM8961_HPR_ENA_DLY | WM8961_HPL_ENA_DLY;
346 snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg);
347
348 /* Enable the DC servo & trigger startup */
349 dcs_reg |=
350 WM8961_DCS_ENA_CHAN_HPR | WM8961_DCS_TRIG_STARTUP_HPR |
351 WM8961_DCS_ENA_CHAN_HPL | WM8961_DCS_TRIG_STARTUP_HPL;
352 dev_dbg(codec->dev, "Enabling DC servo\n");
353
354 snd_soc_write(codec, WM8961_DC_SERVO_1, dcs_reg);
355 do {
356 msleep(1);
357 dcs_reg = snd_soc_read(codec, WM8961_DC_SERVO_1);
358 } while (--timeout &&
359 dcs_reg & (WM8961_DCS_TRIG_STARTUP_HPR |
360 WM8961_DCS_TRIG_STARTUP_HPL));
361 if (dcs_reg & (WM8961_DCS_TRIG_STARTUP_HPR |
362 WM8961_DCS_TRIG_STARTUP_HPL))
363 dev_err(codec->dev, "DC servo timed out\n");
364 else
365 dev_dbg(codec->dev, "DC servo startup complete\n");
366
367 /* Enable the output stage */
368 hp_reg |= WM8961_HPR_ENA_OUTP | WM8961_HPL_ENA_OUTP;
369 snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg);
370
371 /* Remove the short on the output stage */
372 hp_reg |= WM8961_HPR_RMV_SHORT | WM8961_HPL_RMV_SHORT;
373 snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg);
374 }
375
376 if (event & SND_SOC_DAPM_PRE_PMD) {
377 /* Short the output */
378 hp_reg &= ~(WM8961_HPR_RMV_SHORT | WM8961_HPL_RMV_SHORT);
379 snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg);
380
381 /* Disable the output stage */
382 hp_reg &= ~(WM8961_HPR_ENA_OUTP | WM8961_HPL_ENA_OUTP);
383 snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg);
384
385 /* Disable DC offset cancellation */
386 dcs_reg &= ~(WM8961_DCS_ENA_CHAN_HPR |
387 WM8961_DCS_ENA_CHAN_HPL);
388 snd_soc_write(codec, WM8961_DC_SERVO_1, dcs_reg);
389
390 /* Finish up */
391 hp_reg &= ~(WM8961_HPR_ENA_DLY | WM8961_HPR_ENA |
392 WM8961_HPL_ENA_DLY | WM8961_HPL_ENA);
393 snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg);
394
395 /* Disable the PGA */
396 pwr_reg &= ~(WM8961_LOUT1_PGA | WM8961_ROUT1_PGA);
397 snd_soc_write(codec, WM8961_PWR_MGMT_2, pwr_reg);
398
399 /* Disable the charge pump */
400 dev_dbg(codec->dev, "Disabling charge pump\n");
401 snd_soc_write(codec, WM8961_CHARGE_PUMP_1,
402 cp_reg & ~WM8961_CP_ENA);
403 }
404
405 return 0;
406 }
407
408 static int wm8961_spk_event(struct snd_soc_dapm_widget *w,
409 struct snd_kcontrol *kcontrol, int event)
410 {
411 struct snd_soc_codec *codec = w->codec;
412 u16 pwr_reg = snd_soc_read(codec, WM8961_PWR_MGMT_2);
413 u16 spk_reg = snd_soc_read(codec, WM8961_CLASS_D_CONTROL_1);
414
415 if (event & SND_SOC_DAPM_POST_PMU) {
416 /* Enable the PGA */
417 pwr_reg |= WM8961_SPKL_PGA | WM8961_SPKR_PGA;
418 snd_soc_write(codec, WM8961_PWR_MGMT_2, pwr_reg);
419
420 /* Enable the amplifier */
421 spk_reg |= WM8961_SPKL_ENA | WM8961_SPKR_ENA;
422 snd_soc_write(codec, WM8961_CLASS_D_CONTROL_1, spk_reg);
423 }
424
425 if (event & SND_SOC_DAPM_PRE_PMD) {
426 /* Enable the amplifier */
427 spk_reg &= ~(WM8961_SPKL_ENA | WM8961_SPKR_ENA);
428 snd_soc_write(codec, WM8961_CLASS_D_CONTROL_1, spk_reg);
429
430 /* Enable the PGA */
431 pwr_reg &= ~(WM8961_SPKL_PGA | WM8961_SPKR_PGA);
432 snd_soc_write(codec, WM8961_PWR_MGMT_2, pwr_reg);
433 }
434
435 return 0;
436 }
437
438 static const char *adc_hpf_text[] = {
439 "Hi-fi", "Voice 1", "Voice 2", "Voice 3",
440 };
441
442 static const struct soc_enum adc_hpf =
443 SOC_ENUM_SINGLE(WM8961_ADC_DAC_CONTROL_2, 7, 4, adc_hpf_text);
444
445 static const char *dac_deemph_text[] = {
446 "None", "32kHz", "44.1kHz", "48kHz",
447 };
448
449 static const struct soc_enum dac_deemph =
450 SOC_ENUM_SINGLE(WM8961_ADC_DAC_CONTROL_1, 1, 4, dac_deemph_text);
451
452 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
453 static const DECLARE_TLV_DB_SCALE(hp_sec_tlv, -700, 100, 0);
454 static const DECLARE_TLV_DB_SCALE(adc_tlv, -7200, 75, 1);
455 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -3600, 300, 0);
456 static unsigned int boost_tlv[] = {
457 TLV_DB_RANGE_HEAD(4),
458 0, 0, TLV_DB_SCALE_ITEM(0, 0, 0),
459 1, 1, TLV_DB_SCALE_ITEM(13, 0, 0),
460 2, 2, TLV_DB_SCALE_ITEM(20, 0, 0),
461 3, 3, TLV_DB_SCALE_ITEM(29, 0, 0),
462 };
463 static const DECLARE_TLV_DB_SCALE(pga_tlv, -2325, 75, 0);
464
465 static const struct snd_kcontrol_new wm8961_snd_controls[] = {
466 SOC_DOUBLE_R_TLV("Headphone Volume", WM8961_LOUT1_VOLUME, WM8961_ROUT1_VOLUME,
467 0, 127, 0, out_tlv),
468 SOC_DOUBLE_TLV("Headphone Secondary Volume", WM8961_ANALOGUE_HP_2,
469 6, 3, 7, 0, hp_sec_tlv),
470 SOC_DOUBLE_R("Headphone ZC Switch", WM8961_LOUT1_VOLUME, WM8961_ROUT1_VOLUME,
471 7, 1, 0),
472
473 SOC_DOUBLE_R_TLV("Speaker Volume", WM8961_LOUT2_VOLUME, WM8961_ROUT2_VOLUME,
474 0, 127, 0, out_tlv),
475 SOC_DOUBLE_R("Speaker ZC Switch", WM8961_LOUT2_VOLUME, WM8961_ROUT2_VOLUME,
476 7, 1, 0),
477 SOC_SINGLE("Speaker AC Gain", WM8961_CLASS_D_CONTROL_2, 0, 7, 0),
478
479 SOC_SINGLE("DAC x128 OSR Switch", WM8961_ADC_DAC_CONTROL_2, 0, 1, 0),
480 SOC_ENUM("DAC Deemphasis", dac_deemph),
481 SOC_SINGLE("DAC Soft Mute Switch", WM8961_ADC_DAC_CONTROL_2, 3, 1, 0),
482
483 SOC_DOUBLE_R_TLV("Sidetone Volume", WM8961_DSP_SIDETONE_0,
484 WM8961_DSP_SIDETONE_1, 4, 12, 0, sidetone_tlv),
485
486 SOC_SINGLE("ADC High Pass Filter Switch", WM8961_ADC_DAC_CONTROL_1, 0, 1, 0),
487 SOC_ENUM("ADC High Pass Filter Mode", adc_hpf),
488
489 SOC_DOUBLE_R_TLV("Capture Volume",
490 WM8961_LEFT_ADC_VOLUME, WM8961_RIGHT_ADC_VOLUME,
491 1, 119, 0, adc_tlv),
492 SOC_DOUBLE_R_TLV("Capture Boost Volume",
493 WM8961_ADCL_SIGNAL_PATH, WM8961_ADCR_SIGNAL_PATH,
494 4, 3, 0, boost_tlv),
495 SOC_DOUBLE_R_TLV("Capture PGA Volume",
496 WM8961_LEFT_INPUT_VOLUME, WM8961_RIGHT_INPUT_VOLUME,
497 0, 62, 0, pga_tlv),
498 SOC_DOUBLE_R("Capture PGA ZC Switch",
499 WM8961_LEFT_INPUT_VOLUME, WM8961_RIGHT_INPUT_VOLUME,
500 6, 1, 1),
501 SOC_DOUBLE_R("Capture PGA Switch",
502 WM8961_LEFT_INPUT_VOLUME, WM8961_RIGHT_INPUT_VOLUME,
503 7, 1, 1),
504 };
505
506 static const char *sidetone_text[] = {
507 "None", "Left", "Right"
508 };
509
510 static const struct soc_enum dacl_sidetone =
511 SOC_ENUM_SINGLE(WM8961_DSP_SIDETONE_0, 2, 3, sidetone_text);
512
513 static const struct soc_enum dacr_sidetone =
514 SOC_ENUM_SINGLE(WM8961_DSP_SIDETONE_1, 2, 3, sidetone_text);
515
516 static const struct snd_kcontrol_new dacl_mux =
517 SOC_DAPM_ENUM("DACL Sidetone", dacl_sidetone);
518
519 static const struct snd_kcontrol_new dacr_mux =
520 SOC_DAPM_ENUM("DACR Sidetone", dacr_sidetone);
521
522 static const struct snd_soc_dapm_widget wm8961_dapm_widgets[] = {
523 SND_SOC_DAPM_INPUT("LINPUT"),
524 SND_SOC_DAPM_INPUT("RINPUT"),
525
526 SND_SOC_DAPM_SUPPLY("CLK_DSP", WM8961_CLOCKING2, 4, 0, NULL, 0),
527
528 SND_SOC_DAPM_PGA("Left Input", WM8961_PWR_MGMT_1, 5, 0, NULL, 0),
529 SND_SOC_DAPM_PGA("Right Input", WM8961_PWR_MGMT_1, 4, 0, NULL, 0),
530
531 SND_SOC_DAPM_ADC("ADCL", "HiFi Capture", WM8961_PWR_MGMT_1, 3, 0),
532 SND_SOC_DAPM_ADC("ADCR", "HiFi Capture", WM8961_PWR_MGMT_1, 2, 0),
533
534 SND_SOC_DAPM_MICBIAS("MICBIAS", WM8961_PWR_MGMT_1, 1, 0),
535
536 SND_SOC_DAPM_MUX("DACL Sidetone", SND_SOC_NOPM, 0, 0, &dacl_mux),
537 SND_SOC_DAPM_MUX("DACR Sidetone", SND_SOC_NOPM, 0, 0, &dacr_mux),
538
539 SND_SOC_DAPM_DAC("DACL", "HiFi Playback", WM8961_PWR_MGMT_2, 8, 0),
540 SND_SOC_DAPM_DAC("DACR", "HiFi Playback", WM8961_PWR_MGMT_2, 7, 0),
541
542 /* Handle as a mono path for DCS */
543 SND_SOC_DAPM_PGA_E("Headphone Output", SND_SOC_NOPM,
544 4, 0, NULL, 0, wm8961_hp_event,
545 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
546 SND_SOC_DAPM_PGA_E("Speaker Output", SND_SOC_NOPM,
547 4, 0, NULL, 0, wm8961_spk_event,
548 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
549
550 SND_SOC_DAPM_OUTPUT("HP_L"),
551 SND_SOC_DAPM_OUTPUT("HP_R"),
552 SND_SOC_DAPM_OUTPUT("SPK_LN"),
553 SND_SOC_DAPM_OUTPUT("SPK_LP"),
554 SND_SOC_DAPM_OUTPUT("SPK_RN"),
555 SND_SOC_DAPM_OUTPUT("SPK_RP"),
556 };
557
558
559 static const struct snd_soc_dapm_route audio_paths[] = {
560 { "DACL", NULL, "CLK_DSP" },
561 { "DACL", NULL, "DACL Sidetone" },
562 { "DACR", NULL, "CLK_DSP" },
563 { "DACR", NULL, "DACR Sidetone" },
564
565 { "DACL Sidetone", "Left", "ADCL" },
566 { "DACL Sidetone", "Right", "ADCR" },
567
568 { "DACR Sidetone", "Left", "ADCL" },
569 { "DACR Sidetone", "Right", "ADCR" },
570
571 { "HP_L", NULL, "Headphone Output" },
572 { "HP_R", NULL, "Headphone Output" },
573 { "Headphone Output", NULL, "DACL" },
574 { "Headphone Output", NULL, "DACR" },
575
576 { "SPK_LN", NULL, "Speaker Output" },
577 { "SPK_LP", NULL, "Speaker Output" },
578 { "SPK_RN", NULL, "Speaker Output" },
579 { "SPK_RP", NULL, "Speaker Output" },
580
581 { "Speaker Output", NULL, "DACL" },
582 { "Speaker Output", NULL, "DACR" },
583
584 { "ADCL", NULL, "Left Input" },
585 { "ADCL", NULL, "CLK_DSP" },
586 { "ADCR", NULL, "Right Input" },
587 { "ADCR", NULL, "CLK_DSP" },
588
589 { "Left Input", NULL, "LINPUT" },
590 { "Right Input", NULL, "RINPUT" },
591
592 };
593
594 /* Values for CLK_SYS_RATE */
595 static struct {
596 int ratio;
597 u16 val;
598 } wm8961_clk_sys_ratio[] = {
599 { 64, 0 },
600 { 128, 1 },
601 { 192, 2 },
602 { 256, 3 },
603 { 384, 4 },
604 { 512, 5 },
605 { 768, 6 },
606 { 1024, 7 },
607 { 1408, 8 },
608 { 1536, 9 },
609 };
610
611 /* Values for SAMPLE_RATE */
612 static struct {
613 int rate;
614 u16 val;
615 } wm8961_srate[] = {
616 { 48000, 0 },
617 { 44100, 0 },
618 { 32000, 1 },
619 { 22050, 2 },
620 { 24000, 2 },
621 { 16000, 3 },
622 { 11250, 4 },
623 { 12000, 4 },
624 { 8000, 5 },
625 };
626
627 static int wm8961_hw_params(struct snd_pcm_substream *substream,
628 struct snd_pcm_hw_params *params,
629 struct snd_soc_dai *dai)
630 {
631 struct snd_soc_codec *codec = dai->codec;
632 struct wm8961_priv *wm8961 = snd_soc_codec_get_drvdata(codec);
633 int i, best, target, fs;
634 u16 reg;
635
636 fs = params_rate(params);
637
638 if (!wm8961->sysclk) {
639 dev_err(codec->dev, "MCLK has not been specified\n");
640 return -EINVAL;
641 }
642
643 /* Find the closest sample rate for the filters */
644 best = 0;
645 for (i = 0; i < ARRAY_SIZE(wm8961_srate); i++) {
646 if (abs(wm8961_srate[i].rate - fs) <
647 abs(wm8961_srate[best].rate - fs))
648 best = i;
649 }
650 reg = snd_soc_read(codec, WM8961_ADDITIONAL_CONTROL_3);
651 reg &= ~WM8961_SAMPLE_RATE_MASK;
652 reg |= wm8961_srate[best].val;
653 snd_soc_write(codec, WM8961_ADDITIONAL_CONTROL_3, reg);
654 dev_dbg(codec->dev, "Selected SRATE %dHz for %dHz\n",
655 wm8961_srate[best].rate, fs);
656
657 /* Select a CLK_SYS/fs ratio equal to or higher than required */
658 target = wm8961->sysclk / fs;
659
660 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && target < 64) {
661 dev_err(codec->dev,
662 "SYSCLK must be at least 64*fs for DAC\n");
663 return -EINVAL;
664 }
665 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && target < 256) {
666 dev_err(codec->dev,
667 "SYSCLK must be at least 256*fs for ADC\n");
668 return -EINVAL;
669 }
670
671 for (i = 0; i < ARRAY_SIZE(wm8961_clk_sys_ratio); i++) {
672 if (wm8961_clk_sys_ratio[i].ratio >= target)
673 break;
674 }
675 if (i == ARRAY_SIZE(wm8961_clk_sys_ratio)) {
676 dev_err(codec->dev, "Unable to generate CLK_SYS_RATE\n");
677 return -EINVAL;
678 }
679 dev_dbg(codec->dev, "Selected CLK_SYS_RATE of %d for %d/%d=%d\n",
680 wm8961_clk_sys_ratio[i].ratio, wm8961->sysclk, fs,
681 wm8961->sysclk / fs);
682
683 reg = snd_soc_read(codec, WM8961_CLOCKING_4);
684 reg &= ~WM8961_CLK_SYS_RATE_MASK;
685 reg |= wm8961_clk_sys_ratio[i].val << WM8961_CLK_SYS_RATE_SHIFT;
686 snd_soc_write(codec, WM8961_CLOCKING_4, reg);
687
688 reg = snd_soc_read(codec, WM8961_AUDIO_INTERFACE_0);
689 reg &= ~WM8961_WL_MASK;
690 switch (params_format(params)) {
691 case SNDRV_PCM_FORMAT_S16_LE:
692 break;
693 case SNDRV_PCM_FORMAT_S20_3LE:
694 reg |= 1 << WM8961_WL_SHIFT;
695 break;
696 case SNDRV_PCM_FORMAT_S24_LE:
697 reg |= 2 << WM8961_WL_SHIFT;
698 break;
699 case SNDRV_PCM_FORMAT_S32_LE:
700 reg |= 3 << WM8961_WL_SHIFT;
701 break;
702 default:
703 return -EINVAL;
704 }
705 snd_soc_write(codec, WM8961_AUDIO_INTERFACE_0, reg);
706
707 /* Sloping stop-band filter is recommended for <= 24kHz */
708 reg = snd_soc_read(codec, WM8961_ADC_DAC_CONTROL_2);
709 if (fs <= 24000)
710 reg |= WM8961_DACSLOPE;
711 else
712 reg &= ~WM8961_DACSLOPE;
713 snd_soc_write(codec, WM8961_ADC_DAC_CONTROL_2, reg);
714
715 return 0;
716 }
717
718 static int wm8961_set_sysclk(struct snd_soc_dai *dai, int clk_id,
719 unsigned int freq,
720 int dir)
721 {
722 struct snd_soc_codec *codec = dai->codec;
723 struct wm8961_priv *wm8961 = snd_soc_codec_get_drvdata(codec);
724 u16 reg = snd_soc_read(codec, WM8961_CLOCKING1);
725
726 if (freq > 33000000) {
727 dev_err(codec->dev, "MCLK must be <33MHz\n");
728 return -EINVAL;
729 }
730
731 if (freq > 16500000) {
732 dev_dbg(codec->dev, "Using MCLK/2 for %dHz MCLK\n", freq);
733 reg |= WM8961_MCLKDIV;
734 freq /= 2;
735 } else {
736 dev_dbg(codec->dev, "Using MCLK/1 for %dHz MCLK\n", freq);
737 reg &= ~WM8961_MCLKDIV;
738 }
739
740 snd_soc_write(codec, WM8961_CLOCKING1, reg);
741
742 wm8961->sysclk = freq;
743
744 return 0;
745 }
746
747 static int wm8961_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
748 {
749 struct snd_soc_codec *codec = dai->codec;
750 u16 aif = snd_soc_read(codec, WM8961_AUDIO_INTERFACE_0);
751
752 aif &= ~(WM8961_BCLKINV | WM8961_LRP |
753 WM8961_MS | WM8961_FORMAT_MASK);
754
755 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
756 case SND_SOC_DAIFMT_CBM_CFM:
757 aif |= WM8961_MS;
758 break;
759 case SND_SOC_DAIFMT_CBS_CFS:
760 break;
761 default:
762 return -EINVAL;
763 }
764
765 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
766 case SND_SOC_DAIFMT_RIGHT_J:
767 break;
768
769 case SND_SOC_DAIFMT_LEFT_J:
770 aif |= 1;
771 break;
772
773 case SND_SOC_DAIFMT_I2S:
774 aif |= 2;
775 break;
776
777 case SND_SOC_DAIFMT_DSP_B:
778 aif |= WM8961_LRP;
779 case SND_SOC_DAIFMT_DSP_A:
780 aif |= 3;
781 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
782 case SND_SOC_DAIFMT_NB_NF:
783 case SND_SOC_DAIFMT_IB_NF:
784 break;
785 default:
786 return -EINVAL;
787 }
788 break;
789
790 default:
791 return -EINVAL;
792 }
793
794 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
795 case SND_SOC_DAIFMT_NB_NF:
796 break;
797 case SND_SOC_DAIFMT_NB_IF:
798 aif |= WM8961_LRP;
799 break;
800 case SND_SOC_DAIFMT_IB_NF:
801 aif |= WM8961_BCLKINV;
802 break;
803 case SND_SOC_DAIFMT_IB_IF:
804 aif |= WM8961_BCLKINV | WM8961_LRP;
805 break;
806 default:
807 return -EINVAL;
808 }
809
810 return snd_soc_write(codec, WM8961_AUDIO_INTERFACE_0, aif);
811 }
812
813 static int wm8961_set_tristate(struct snd_soc_dai *dai, int tristate)
814 {
815 struct snd_soc_codec *codec = dai->codec;
816 u16 reg = snd_soc_read(codec, WM8961_ADDITIONAL_CONTROL_2);
817
818 if (tristate)
819 reg |= WM8961_TRIS;
820 else
821 reg &= ~WM8961_TRIS;
822
823 return snd_soc_write(codec, WM8961_ADDITIONAL_CONTROL_2, reg);
824 }
825
826 static int wm8961_digital_mute(struct snd_soc_dai *dai, int mute)
827 {
828 struct snd_soc_codec *codec = dai->codec;
829 u16 reg = snd_soc_read(codec, WM8961_ADC_DAC_CONTROL_1);
830
831 if (mute)
832 reg |= WM8961_DACMU;
833 else
834 reg &= ~WM8961_DACMU;
835
836 msleep(17);
837
838 return snd_soc_write(codec, WM8961_ADC_DAC_CONTROL_1, reg);
839 }
840
841 static int wm8961_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div)
842 {
843 struct snd_soc_codec *codec = dai->codec;
844 u16 reg;
845
846 switch (div_id) {
847 case WM8961_BCLK:
848 reg = snd_soc_read(codec, WM8961_CLOCKING2);
849 reg &= ~WM8961_BCLKDIV_MASK;
850 reg |= div;
851 snd_soc_write(codec, WM8961_CLOCKING2, reg);
852 break;
853
854 case WM8961_LRCLK:
855 reg = snd_soc_read(codec, WM8961_AUDIO_INTERFACE_2);
856 reg &= ~WM8961_LRCLK_RATE_MASK;
857 reg |= div;
858 snd_soc_write(codec, WM8961_AUDIO_INTERFACE_2, reg);
859 break;
860
861 default:
862 return -EINVAL;
863 }
864
865 return 0;
866 }
867
868 static int wm8961_set_bias_level(struct snd_soc_codec *codec,
869 enum snd_soc_bias_level level)
870 {
871 u16 reg;
872
873 /* This is all slightly unusual since we have no bypass paths
874 * and the output amplifier structure means we can just slam
875 * the biases straight up rather than having to ramp them
876 * slowly.
877 */
878 switch (level) {
879 case SND_SOC_BIAS_ON:
880 break;
881
882 case SND_SOC_BIAS_PREPARE:
883 if (codec->dapm.bias_level == SND_SOC_BIAS_STANDBY) {
884 /* Enable bias generation */
885 reg = snd_soc_read(codec, WM8961_ANTI_POP);
886 reg |= WM8961_BUFIOEN | WM8961_BUFDCOPEN;
887 snd_soc_write(codec, WM8961_ANTI_POP, reg);
888
889 /* VMID=2*50k, VREF */
890 reg = snd_soc_read(codec, WM8961_PWR_MGMT_1);
891 reg &= ~WM8961_VMIDSEL_MASK;
892 reg |= (1 << WM8961_VMIDSEL_SHIFT) | WM8961_VREF;
893 snd_soc_write(codec, WM8961_PWR_MGMT_1, reg);
894 }
895 break;
896
897 case SND_SOC_BIAS_STANDBY:
898 if (codec->dapm.bias_level == SND_SOC_BIAS_PREPARE) {
899 /* VREF off */
900 reg = snd_soc_read(codec, WM8961_PWR_MGMT_1);
901 reg &= ~WM8961_VREF;
902 snd_soc_write(codec, WM8961_PWR_MGMT_1, reg);
903
904 /* Bias generation off */
905 reg = snd_soc_read(codec, WM8961_ANTI_POP);
906 reg &= ~(WM8961_BUFIOEN | WM8961_BUFDCOPEN);
907 snd_soc_write(codec, WM8961_ANTI_POP, reg);
908
909 /* VMID off */
910 reg = snd_soc_read(codec, WM8961_PWR_MGMT_1);
911 reg &= ~WM8961_VMIDSEL_MASK;
912 snd_soc_write(codec, WM8961_PWR_MGMT_1, reg);
913 }
914 break;
915
916 case SND_SOC_BIAS_OFF:
917 break;
918 }
919
920 codec->dapm.bias_level = level;
921
922 return 0;
923 }
924
925
926 #define WM8961_RATES SNDRV_PCM_RATE_8000_48000
927
928 #define WM8961_FORMATS \
929 (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
930 SNDRV_PCM_FMTBIT_S24_LE)
931
932 static struct snd_soc_dai_ops wm8961_dai_ops = {
933 .hw_params = wm8961_hw_params,
934 .set_sysclk = wm8961_set_sysclk,
935 .set_fmt = wm8961_set_fmt,
936 .digital_mute = wm8961_digital_mute,
937 .set_tristate = wm8961_set_tristate,
938 .set_clkdiv = wm8961_set_clkdiv,
939 };
940
941 static struct snd_soc_dai_driver wm8961_dai = {
942 .name = "wm8961-hifi",
943 .playback = {
944 .stream_name = "HiFi Playback",
945 .channels_min = 1,
946 .channels_max = 2,
947 .rates = WM8961_RATES,
948 .formats = WM8961_FORMATS,},
949 .capture = {
950 .stream_name = "HiFi Capture",
951 .channels_min = 1,
952 .channels_max = 2,
953 .rates = WM8961_RATES,
954 .formats = WM8961_FORMATS,},
955 .ops = &wm8961_dai_ops,
956 };
957
958 static int wm8961_probe(struct snd_soc_codec *codec)
959 {
960 struct snd_soc_dapm_context *dapm = &codec->dapm;
961 int ret = 0;
962 u16 reg;
963
964 ret = snd_soc_codec_set_cache_io(codec, 8, 16, SND_SOC_I2C);
965 if (ret != 0) {
966 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
967 return ret;
968 }
969
970 reg = snd_soc_read(codec, WM8961_SOFTWARE_RESET);
971 if (reg != 0x1801) {
972 dev_err(codec->dev, "Device is not a WM8961: ID=0x%x\n", reg);
973 return -EINVAL;
974 }
975
976 /* This isn't volatile - readback doesn't correspond to write */
977 reg = codec->hw_read(codec, WM8961_RIGHT_INPUT_VOLUME);
978 dev_info(codec->dev, "WM8961 family %d revision %c\n",
979 (reg & WM8961_DEVICE_ID_MASK) >> WM8961_DEVICE_ID_SHIFT,
980 ((reg & WM8961_CHIP_REV_MASK) >> WM8961_CHIP_REV_SHIFT)
981 + 'A');
982
983 ret = wm8961_reset(codec);
984 if (ret < 0) {
985 dev_err(codec->dev, "Failed to issue reset\n");
986 return ret;
987 }
988
989 /* Enable class W */
990 reg = snd_soc_read(codec, WM8961_CHARGE_PUMP_B);
991 reg |= WM8961_CP_DYN_PWR_MASK;
992 snd_soc_write(codec, WM8961_CHARGE_PUMP_B, reg);
993
994 /* Latch volume update bits (right channel only, we always
995 * write both out) and default ZC on. */
996 reg = snd_soc_read(codec, WM8961_ROUT1_VOLUME);
997 snd_soc_write(codec, WM8961_ROUT1_VOLUME,
998 reg | WM8961_LO1ZC | WM8961_OUT1VU);
999 snd_soc_write(codec, WM8961_LOUT1_VOLUME, reg | WM8961_LO1ZC);
1000 reg = snd_soc_read(codec, WM8961_ROUT2_VOLUME);
1001 snd_soc_write(codec, WM8961_ROUT2_VOLUME,
1002 reg | WM8961_SPKRZC | WM8961_SPKVU);
1003 snd_soc_write(codec, WM8961_LOUT2_VOLUME, reg | WM8961_SPKLZC);
1004
1005 reg = snd_soc_read(codec, WM8961_RIGHT_ADC_VOLUME);
1006 snd_soc_write(codec, WM8961_RIGHT_ADC_VOLUME, reg | WM8961_ADCVU);
1007 reg = snd_soc_read(codec, WM8961_RIGHT_INPUT_VOLUME);
1008 snd_soc_write(codec, WM8961_RIGHT_INPUT_VOLUME, reg | WM8961_IPVU);
1009
1010 /* Use soft mute by default */
1011 reg = snd_soc_read(codec, WM8961_ADC_DAC_CONTROL_2);
1012 reg |= WM8961_DACSMM;
1013 snd_soc_write(codec, WM8961_ADC_DAC_CONTROL_2, reg);
1014
1015 /* Use automatic clocking mode by default; for now this is all
1016 * we support.
1017 */
1018 reg = snd_soc_read(codec, WM8961_CLOCKING_3);
1019 reg &= ~WM8961_MANUAL_MODE;
1020 snd_soc_write(codec, WM8961_CLOCKING_3, reg);
1021
1022 wm8961_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1023
1024 snd_soc_add_controls(codec, wm8961_snd_controls,
1025 ARRAY_SIZE(wm8961_snd_controls));
1026 snd_soc_dapm_new_controls(dapm, wm8961_dapm_widgets,
1027 ARRAY_SIZE(wm8961_dapm_widgets));
1028 snd_soc_dapm_add_routes(dapm, audio_paths, ARRAY_SIZE(audio_paths));
1029
1030 return 0;
1031 }
1032
1033 static int wm8961_remove(struct snd_soc_codec *codec)
1034 {
1035 wm8961_set_bias_level(codec, SND_SOC_BIAS_OFF);
1036 return 0;
1037 }
1038
1039 #ifdef CONFIG_PM
1040 static int wm8961_suspend(struct snd_soc_codec *codec, pm_message_t state)
1041 {
1042 wm8961_set_bias_level(codec, SND_SOC_BIAS_OFF);
1043
1044 return 0;
1045 }
1046
1047 static int wm8961_resume(struct snd_soc_codec *codec)
1048 {
1049 u16 *reg_cache = codec->reg_cache;
1050 int i;
1051
1052 for (i = 0; i < codec->driver->reg_cache_size; i++) {
1053 if (reg_cache[i] == wm8961_reg_defaults[i])
1054 continue;
1055
1056 if (i == WM8961_SOFTWARE_RESET)
1057 continue;
1058
1059 snd_soc_write(codec, i, reg_cache[i]);
1060 }
1061
1062 wm8961_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1063
1064 return 0;
1065 }
1066 #else
1067 #define wm8961_suspend NULL
1068 #define wm8961_resume NULL
1069 #endif
1070
1071 static struct snd_soc_codec_driver soc_codec_dev_wm8961 = {
1072 .probe = wm8961_probe,
1073 .remove = wm8961_remove,
1074 .suspend = wm8961_suspend,
1075 .resume = wm8961_resume,
1076 .set_bias_level = wm8961_set_bias_level,
1077 .reg_cache_size = ARRAY_SIZE(wm8961_reg_defaults),
1078 .reg_word_size = sizeof(u16),
1079 .reg_cache_default = wm8961_reg_defaults,
1080 .volatile_register = wm8961_volatile_register,
1081 };
1082
1083 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1084 static __devinit int wm8961_i2c_probe(struct i2c_client *i2c,
1085 const struct i2c_device_id *id)
1086 {
1087 struct wm8961_priv *wm8961;
1088 int ret;
1089
1090 wm8961 = kzalloc(sizeof(struct wm8961_priv), GFP_KERNEL);
1091 if (wm8961 == NULL)
1092 return -ENOMEM;
1093
1094 i2c_set_clientdata(i2c, wm8961);
1095
1096 ret = snd_soc_register_codec(&i2c->dev,
1097 &soc_codec_dev_wm8961, &wm8961_dai, 1);
1098 if (ret < 0)
1099 kfree(wm8961);
1100 return ret;
1101 }
1102
1103 static __devexit int wm8961_i2c_remove(struct i2c_client *client)
1104 {
1105 snd_soc_unregister_codec(&client->dev);
1106 kfree(i2c_get_clientdata(client));
1107 return 0;
1108 }
1109
1110 static const struct i2c_device_id wm8961_i2c_id[] = {
1111 { "wm8961", 0 },
1112 { }
1113 };
1114 MODULE_DEVICE_TABLE(i2c, wm8961_i2c_id);
1115
1116 static struct i2c_driver wm8961_i2c_driver = {
1117 .driver = {
1118 .name = "wm8961-codec",
1119 .owner = THIS_MODULE,
1120 },
1121 .probe = wm8961_i2c_probe,
1122 .remove = __devexit_p(wm8961_i2c_remove),
1123 .id_table = wm8961_i2c_id,
1124 };
1125 #endif
1126
1127 static int __init wm8961_modinit(void)
1128 {
1129 int ret = 0;
1130 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1131 ret = i2c_add_driver(&wm8961_i2c_driver);
1132 if (ret != 0) {
1133 printk(KERN_ERR "Failed to register wm8961 I2C driver: %d\n",
1134 ret);
1135 }
1136 #endif
1137 return ret;
1138 }
1139 module_init(wm8961_modinit);
1140
1141 static void __exit wm8961_exit(void)
1142 {
1143 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1144 i2c_del_driver(&wm8961_i2c_driver);
1145 #endif
1146 }
1147 module_exit(wm8961_exit);
1148
1149 MODULE_DESCRIPTION("ASoC WM8961 driver");
1150 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
1151 MODULE_LICENSE("GPL");
Linux Btrfs Development