2 * wm8960.c -- WM8960 ALSA SoC Audio driver
4 * Copyright 2007-11 Wolfson Microelectronics, plc
6 * Author: Liam Girdwood
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/module.h>
14 #include <linux/moduleparam.h>
15 #include <linux/init.h>
16 #include <linux/delay.h>
18 #include <linux/clk.h>
19 #include <linux/i2c.h>
20 #include <linux/slab.h>
21 #include <sound/core.h>
22 #include <sound/pcm.h>
23 #include <sound/pcm_params.h>
24 #include <sound/soc.h>
25 #include <sound/initval.h>
26 #include <sound/tlv.h>
27 #include <sound/wm8960.h>
32 #define WM8960_VMID_MASK 0x180
33 #define WM8960_VREF 0x40
36 #define WM8960_PWR2_LOUT1 0x40
37 #define WM8960_PWR2_ROUT1 0x20
38 #define WM8960_PWR2_OUT3 0x02
40 /* R28 - Anti-pop 1 */
41 #define WM8960_POBCTRL 0x80
42 #define WM8960_BUFDCOPEN 0x10
43 #define WM8960_BUFIOEN 0x08
44 #define WM8960_SOFT_ST 0x04
45 #define WM8960_HPSTBY 0x01
47 /* R29 - Anti-pop 2 */
48 #define WM8960_DISOP 0x40
49 #define WM8960_DRES_MASK 0x30
51 static bool is_pll_freq_available(unsigned int source
, unsigned int target
);
52 static int wm8960_set_pll(struct snd_soc_codec
*codec
,
53 unsigned int freq_in
, unsigned int freq_out
);
55 * wm8960 register cache
56 * We can't read the WM8960 register space when we are
57 * using 2 wire for device control, so we cache them instead.
59 static const struct reg_default wm8960_reg_defaults
[] = {
113 static bool wm8960_volatile(struct device
*dev
, unsigned int reg
)
125 struct regmap
*regmap
;
126 int (*set_bias_level
)(struct snd_soc_codec
*,
127 enum snd_soc_bias_level level
);
128 struct snd_soc_dapm_widget
*lout1
;
129 struct snd_soc_dapm_widget
*rout1
;
130 struct snd_soc_dapm_widget
*out3
;
137 bool is_stream_in_use
[2];
138 struct wm8960_data pdata
;
141 #define wm8960_reset(c) regmap_write(c, WM8960_RESET, 0)
143 /* enumerated controls */
144 static const char *wm8960_polarity
[] = {"No Inversion", "Left Inverted",
145 "Right Inverted", "Stereo Inversion"};
146 static const char *wm8960_3d_upper_cutoff
[] = {"High", "Low"};
147 static const char *wm8960_3d_lower_cutoff
[] = {"Low", "High"};
148 static const char *wm8960_alcfunc
[] = {"Off", "Right", "Left", "Stereo"};
149 static const char *wm8960_alcmode
[] = {"ALC", "Limiter"};
151 static const struct soc_enum wm8960_enum
[] = {
152 SOC_ENUM_SINGLE(WM8960_DACCTL1
, 5, 4, wm8960_polarity
),
153 SOC_ENUM_SINGLE(WM8960_DACCTL2
, 5, 4, wm8960_polarity
),
154 SOC_ENUM_SINGLE(WM8960_3D
, 6, 2, wm8960_3d_upper_cutoff
),
155 SOC_ENUM_SINGLE(WM8960_3D
, 5, 2, wm8960_3d_lower_cutoff
),
156 SOC_ENUM_SINGLE(WM8960_ALC1
, 7, 4, wm8960_alcfunc
),
157 SOC_ENUM_SINGLE(WM8960_ALC3
, 8, 2, wm8960_alcmode
),
160 static const int deemph_settings
[] = { 0, 32000, 44100, 48000 };
162 static int wm8960_set_deemph(struct snd_soc_codec
*codec
)
164 struct wm8960_priv
*wm8960
= snd_soc_codec_get_drvdata(codec
);
167 /* If we're using deemphasis select the nearest available sample
170 if (wm8960
->deemph
) {
172 for (i
= 2; i
< ARRAY_SIZE(deemph_settings
); i
++) {
173 if (abs(deemph_settings
[i
] - wm8960
->lrclk
) <
174 abs(deemph_settings
[best
] - wm8960
->lrclk
))
183 dev_dbg(codec
->dev
, "Set deemphasis %d\n", val
);
185 return snd_soc_update_bits(codec
, WM8960_DACCTL1
,
189 static int wm8960_get_deemph(struct snd_kcontrol
*kcontrol
,
190 struct snd_ctl_elem_value
*ucontrol
)
192 struct snd_soc_codec
*codec
= snd_soc_kcontrol_codec(kcontrol
);
193 struct wm8960_priv
*wm8960
= snd_soc_codec_get_drvdata(codec
);
195 ucontrol
->value
.integer
.value
[0] = wm8960
->deemph
;
199 static int wm8960_put_deemph(struct snd_kcontrol
*kcontrol
,
200 struct snd_ctl_elem_value
*ucontrol
)
202 struct snd_soc_codec
*codec
= snd_soc_kcontrol_codec(kcontrol
);
203 struct wm8960_priv
*wm8960
= snd_soc_codec_get_drvdata(codec
);
204 int deemph
= ucontrol
->value
.integer
.value
[0];
209 wm8960
->deemph
= deemph
;
211 return wm8960_set_deemph(codec
);
214 static const DECLARE_TLV_DB_SCALE(adc_tlv
, -9700, 50, 0);
215 static const DECLARE_TLV_DB_SCALE(dac_tlv
, -12700, 50, 1);
216 static const DECLARE_TLV_DB_SCALE(bypass_tlv
, -2100, 300, 0);
217 static const DECLARE_TLV_DB_SCALE(out_tlv
, -12100, 100, 1);
218 static const DECLARE_TLV_DB_SCALE(boost_tlv
, -1200, 300, 1);
220 static const struct snd_kcontrol_new wm8960_snd_controls
[] = {
221 SOC_DOUBLE_R_TLV("Capture Volume", WM8960_LINVOL
, WM8960_RINVOL
,
223 SOC_DOUBLE_R("Capture Volume ZC Switch", WM8960_LINVOL
, WM8960_RINVOL
,
225 SOC_DOUBLE_R("Capture Switch", WM8960_LINVOL
, WM8960_RINVOL
,
228 SOC_SINGLE_TLV("Right Input Boost Mixer RINPUT3 Volume",
229 WM8960_INBMIX1
, 4, 7, 0, boost_tlv
),
230 SOC_SINGLE_TLV("Right Input Boost Mixer RINPUT2 Volume",
231 WM8960_INBMIX1
, 1, 7, 0, boost_tlv
),
232 SOC_SINGLE_TLV("Left Input Boost Mixer LINPUT3 Volume",
233 WM8960_INBMIX2
, 4, 7, 0, boost_tlv
),
234 SOC_SINGLE_TLV("Left Input Boost Mixer LINPUT2 Volume",
235 WM8960_INBMIX2
, 1, 7, 0, boost_tlv
),
237 SOC_DOUBLE_R_TLV("Playback Volume", WM8960_LDAC
, WM8960_RDAC
,
240 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8960_LOUT1
, WM8960_ROUT1
,
242 SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8960_LOUT1
, WM8960_ROUT1
,
245 SOC_DOUBLE_R_TLV("Speaker Playback Volume", WM8960_LOUT2
, WM8960_ROUT2
,
247 SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8960_LOUT2
, WM8960_ROUT2
,
249 SOC_SINGLE("Speaker DC Volume", WM8960_CLASSD3
, 3, 5, 0),
250 SOC_SINGLE("Speaker AC Volume", WM8960_CLASSD3
, 0, 5, 0),
252 SOC_SINGLE("PCM Playback -6dB Switch", WM8960_DACCTL1
, 7, 1, 0),
253 SOC_ENUM("ADC Polarity", wm8960_enum
[0]),
254 SOC_SINGLE("ADC High Pass Filter Switch", WM8960_DACCTL1
, 0, 1, 0),
256 SOC_ENUM("DAC Polarity", wm8960_enum
[1]),
257 SOC_SINGLE_BOOL_EXT("DAC Deemphasis Switch", 0,
258 wm8960_get_deemph
, wm8960_put_deemph
),
260 SOC_ENUM("3D Filter Upper Cut-Off", wm8960_enum
[2]),
261 SOC_ENUM("3D Filter Lower Cut-Off", wm8960_enum
[3]),
262 SOC_SINGLE("3D Volume", WM8960_3D
, 1, 15, 0),
263 SOC_SINGLE("3D Switch", WM8960_3D
, 0, 1, 0),
265 SOC_ENUM("ALC Function", wm8960_enum
[4]),
266 SOC_SINGLE("ALC Max Gain", WM8960_ALC1
, 4, 7, 0),
267 SOC_SINGLE("ALC Target", WM8960_ALC1
, 0, 15, 1),
268 SOC_SINGLE("ALC Min Gain", WM8960_ALC2
, 4, 7, 0),
269 SOC_SINGLE("ALC Hold Time", WM8960_ALC2
, 0, 15, 0),
270 SOC_ENUM("ALC Mode", wm8960_enum
[5]),
271 SOC_SINGLE("ALC Decay", WM8960_ALC3
, 4, 15, 0),
272 SOC_SINGLE("ALC Attack", WM8960_ALC3
, 0, 15, 0),
274 SOC_SINGLE("Noise Gate Threshold", WM8960_NOISEG
, 3, 31, 0),
275 SOC_SINGLE("Noise Gate Switch", WM8960_NOISEG
, 0, 1, 0),
277 SOC_DOUBLE_R_TLV("ADC PCM Capture Volume", WM8960_LADC
, WM8960_RADC
,
280 SOC_SINGLE_TLV("Left Output Mixer Boost Bypass Volume",
281 WM8960_BYPASS1
, 4, 7, 1, bypass_tlv
),
282 SOC_SINGLE_TLV("Left Output Mixer LINPUT3 Volume",
283 WM8960_LOUTMIX
, 4, 7, 1, bypass_tlv
),
284 SOC_SINGLE_TLV("Right Output Mixer Boost Bypass Volume",
285 WM8960_BYPASS2
, 4, 7, 1, bypass_tlv
),
286 SOC_SINGLE_TLV("Right Output Mixer RINPUT3 Volume",
287 WM8960_ROUTMIX
, 4, 7, 1, bypass_tlv
),
290 static const struct snd_kcontrol_new wm8960_lin_boost
[] = {
291 SOC_DAPM_SINGLE("LINPUT2 Switch", WM8960_LINPATH
, 6, 1, 0),
292 SOC_DAPM_SINGLE("LINPUT3 Switch", WM8960_LINPATH
, 7, 1, 0),
293 SOC_DAPM_SINGLE("LINPUT1 Switch", WM8960_LINPATH
, 8, 1, 0),
296 static const struct snd_kcontrol_new wm8960_lin
[] = {
297 SOC_DAPM_SINGLE("Boost Switch", WM8960_LINPATH
, 3, 1, 0),
300 static const struct snd_kcontrol_new wm8960_rin_boost
[] = {
301 SOC_DAPM_SINGLE("RINPUT2 Switch", WM8960_RINPATH
, 6, 1, 0),
302 SOC_DAPM_SINGLE("RINPUT3 Switch", WM8960_RINPATH
, 7, 1, 0),
303 SOC_DAPM_SINGLE("RINPUT1 Switch", WM8960_RINPATH
, 8, 1, 0),
306 static const struct snd_kcontrol_new wm8960_rin
[] = {
307 SOC_DAPM_SINGLE("Boost Switch", WM8960_RINPATH
, 3, 1, 0),
310 static const struct snd_kcontrol_new wm8960_loutput_mixer
[] = {
311 SOC_DAPM_SINGLE("PCM Playback Switch", WM8960_LOUTMIX
, 8, 1, 0),
312 SOC_DAPM_SINGLE("LINPUT3 Switch", WM8960_LOUTMIX
, 7, 1, 0),
313 SOC_DAPM_SINGLE("Boost Bypass Switch", WM8960_BYPASS1
, 7, 1, 0),
316 static const struct snd_kcontrol_new wm8960_routput_mixer
[] = {
317 SOC_DAPM_SINGLE("PCM Playback Switch", WM8960_ROUTMIX
, 8, 1, 0),
318 SOC_DAPM_SINGLE("RINPUT3 Switch", WM8960_ROUTMIX
, 7, 1, 0),
319 SOC_DAPM_SINGLE("Boost Bypass Switch", WM8960_BYPASS2
, 7, 1, 0),
322 static const struct snd_kcontrol_new wm8960_mono_out
[] = {
323 SOC_DAPM_SINGLE("Left Switch", WM8960_MONOMIX1
, 7, 1, 0),
324 SOC_DAPM_SINGLE("Right Switch", WM8960_MONOMIX2
, 7, 1, 0),
327 static const struct snd_soc_dapm_widget wm8960_dapm_widgets
[] = {
328 SND_SOC_DAPM_INPUT("LINPUT1"),
329 SND_SOC_DAPM_INPUT("RINPUT1"),
330 SND_SOC_DAPM_INPUT("LINPUT2"),
331 SND_SOC_DAPM_INPUT("RINPUT2"),
332 SND_SOC_DAPM_INPUT("LINPUT3"),
333 SND_SOC_DAPM_INPUT("RINPUT3"),
335 SND_SOC_DAPM_SUPPLY("MICB", WM8960_POWER1
, 1, 0, NULL
, 0),
337 SND_SOC_DAPM_MIXER("Left Boost Mixer", WM8960_POWER1
, 5, 0,
338 wm8960_lin_boost
, ARRAY_SIZE(wm8960_lin_boost
)),
339 SND_SOC_DAPM_MIXER("Right Boost Mixer", WM8960_POWER1
, 4, 0,
340 wm8960_rin_boost
, ARRAY_SIZE(wm8960_rin_boost
)),
342 SND_SOC_DAPM_MIXER("Left Input Mixer", WM8960_POWER3
, 5, 0,
343 wm8960_lin
, ARRAY_SIZE(wm8960_lin
)),
344 SND_SOC_DAPM_MIXER("Right Input Mixer", WM8960_POWER3
, 4, 0,
345 wm8960_rin
, ARRAY_SIZE(wm8960_rin
)),
347 SND_SOC_DAPM_ADC("Left ADC", "Capture", WM8960_POWER1
, 3, 0),
348 SND_SOC_DAPM_ADC("Right ADC", "Capture", WM8960_POWER1
, 2, 0),
350 SND_SOC_DAPM_DAC("Left DAC", "Playback", WM8960_POWER2
, 8, 0),
351 SND_SOC_DAPM_DAC("Right DAC", "Playback", WM8960_POWER2
, 7, 0),
353 SND_SOC_DAPM_MIXER("Left Output Mixer", WM8960_POWER3
, 3, 0,
354 &wm8960_loutput_mixer
[0],
355 ARRAY_SIZE(wm8960_loutput_mixer
)),
356 SND_SOC_DAPM_MIXER("Right Output Mixer", WM8960_POWER3
, 2, 0,
357 &wm8960_routput_mixer
[0],
358 ARRAY_SIZE(wm8960_routput_mixer
)),
360 SND_SOC_DAPM_PGA("LOUT1 PGA", WM8960_POWER2
, 6, 0, NULL
, 0),
361 SND_SOC_DAPM_PGA("ROUT1 PGA", WM8960_POWER2
, 5, 0, NULL
, 0),
363 SND_SOC_DAPM_PGA("Left Speaker PGA", WM8960_POWER2
, 4, 0, NULL
, 0),
364 SND_SOC_DAPM_PGA("Right Speaker PGA", WM8960_POWER2
, 3, 0, NULL
, 0),
366 SND_SOC_DAPM_PGA("Right Speaker Output", WM8960_CLASSD1
, 7, 0, NULL
, 0),
367 SND_SOC_DAPM_PGA("Left Speaker Output", WM8960_CLASSD1
, 6, 0, NULL
, 0),
369 SND_SOC_DAPM_OUTPUT("SPK_LP"),
370 SND_SOC_DAPM_OUTPUT("SPK_LN"),
371 SND_SOC_DAPM_OUTPUT("HP_L"),
372 SND_SOC_DAPM_OUTPUT("HP_R"),
373 SND_SOC_DAPM_OUTPUT("SPK_RP"),
374 SND_SOC_DAPM_OUTPUT("SPK_RN"),
375 SND_SOC_DAPM_OUTPUT("OUT3"),
378 static const struct snd_soc_dapm_widget wm8960_dapm_widgets_out3
[] = {
379 SND_SOC_DAPM_MIXER("Mono Output Mixer", WM8960_POWER2
, 1, 0,
381 ARRAY_SIZE(wm8960_mono_out
)),
384 /* Represent OUT3 as a PGA so that it gets turned on with LOUT1/ROUT1 */
385 static const struct snd_soc_dapm_widget wm8960_dapm_widgets_capless
[] = {
386 SND_SOC_DAPM_PGA("OUT3 VMID", WM8960_POWER2
, 1, 0, NULL
, 0),
389 static const struct snd_soc_dapm_route audio_paths
[] = {
390 { "Left Boost Mixer", "LINPUT1 Switch", "LINPUT1" },
391 { "Left Boost Mixer", "LINPUT2 Switch", "LINPUT2" },
392 { "Left Boost Mixer", "LINPUT3 Switch", "LINPUT3" },
394 { "Left Input Mixer", "Boost Switch", "Left Boost Mixer", },
395 { "Left Input Mixer", NULL
, "LINPUT1", }, /* Really Boost Switch */
396 { "Left Input Mixer", NULL
, "LINPUT2" },
397 { "Left Input Mixer", NULL
, "LINPUT3" },
399 { "Right Boost Mixer", "RINPUT1 Switch", "RINPUT1" },
400 { "Right Boost Mixer", "RINPUT2 Switch", "RINPUT2" },
401 { "Right Boost Mixer", "RINPUT3 Switch", "RINPUT3" },
403 { "Right Input Mixer", "Boost Switch", "Right Boost Mixer", },
404 { "Right Input Mixer", NULL
, "RINPUT1", }, /* Really Boost Switch */
405 { "Right Input Mixer", NULL
, "RINPUT2" },
406 { "Right Input Mixer", NULL
, "RINPUT3" },
408 { "Left ADC", NULL
, "Left Input Mixer" },
409 { "Right ADC", NULL
, "Right Input Mixer" },
411 { "Left Output Mixer", "LINPUT3 Switch", "LINPUT3" },
412 { "Left Output Mixer", "Boost Bypass Switch", "Left Boost Mixer"} ,
413 { "Left Output Mixer", "PCM Playback Switch", "Left DAC" },
415 { "Right Output Mixer", "RINPUT3 Switch", "RINPUT3" },
416 { "Right Output Mixer", "Boost Bypass Switch", "Right Boost Mixer" } ,
417 { "Right Output Mixer", "PCM Playback Switch", "Right DAC" },
419 { "LOUT1 PGA", NULL
, "Left Output Mixer" },
420 { "ROUT1 PGA", NULL
, "Right Output Mixer" },
422 { "HP_L", NULL
, "LOUT1 PGA" },
423 { "HP_R", NULL
, "ROUT1 PGA" },
425 { "Left Speaker PGA", NULL
, "Left Output Mixer" },
426 { "Right Speaker PGA", NULL
, "Right Output Mixer" },
428 { "Left Speaker Output", NULL
, "Left Speaker PGA" },
429 { "Right Speaker Output", NULL
, "Right Speaker PGA" },
431 { "SPK_LN", NULL
, "Left Speaker Output" },
432 { "SPK_LP", NULL
, "Left Speaker Output" },
433 { "SPK_RN", NULL
, "Right Speaker Output" },
434 { "SPK_RP", NULL
, "Right Speaker Output" },
437 static const struct snd_soc_dapm_route audio_paths_out3
[] = {
438 { "Mono Output Mixer", "Left Switch", "Left Output Mixer" },
439 { "Mono Output Mixer", "Right Switch", "Right Output Mixer" },
441 { "OUT3", NULL
, "Mono Output Mixer", }
444 static const struct snd_soc_dapm_route audio_paths_capless
[] = {
445 { "HP_L", NULL
, "OUT3 VMID" },
446 { "HP_R", NULL
, "OUT3 VMID" },
448 { "OUT3 VMID", NULL
, "Left Output Mixer" },
449 { "OUT3 VMID", NULL
, "Right Output Mixer" },
452 static int wm8960_add_widgets(struct snd_soc_codec
*codec
)
454 struct wm8960_priv
*wm8960
= snd_soc_codec_get_drvdata(codec
);
455 struct wm8960_data
*pdata
= &wm8960
->pdata
;
456 struct snd_soc_dapm_context
*dapm
= snd_soc_codec_get_dapm(codec
);
457 struct snd_soc_dapm_widget
*w
;
459 snd_soc_dapm_new_controls(dapm
, wm8960_dapm_widgets
,
460 ARRAY_SIZE(wm8960_dapm_widgets
));
462 snd_soc_dapm_add_routes(dapm
, audio_paths
, ARRAY_SIZE(audio_paths
));
464 /* In capless mode OUT3 is used to provide VMID for the
465 * headphone outputs, otherwise it is used as a mono mixer.
467 if (pdata
&& pdata
->capless
) {
468 snd_soc_dapm_new_controls(dapm
, wm8960_dapm_widgets_capless
,
469 ARRAY_SIZE(wm8960_dapm_widgets_capless
));
471 snd_soc_dapm_add_routes(dapm
, audio_paths_capless
,
472 ARRAY_SIZE(audio_paths_capless
));
474 snd_soc_dapm_new_controls(dapm
, wm8960_dapm_widgets_out3
,
475 ARRAY_SIZE(wm8960_dapm_widgets_out3
));
477 snd_soc_dapm_add_routes(dapm
, audio_paths_out3
,
478 ARRAY_SIZE(audio_paths_out3
));
481 /* We need to power up the headphone output stage out of
482 * sequence for capless mode. To save scanning the widget
483 * list each time to find the desired power state do so now
484 * and save the result.
486 list_for_each_entry(w
, &codec
->component
.card
->widgets
, list
) {
489 if (strcmp(w
->name
, "LOUT1 PGA") == 0)
491 if (strcmp(w
->name
, "ROUT1 PGA") == 0)
493 if (strcmp(w
->name
, "OUT3 VMID") == 0)
500 static int wm8960_set_dai_fmt(struct snd_soc_dai
*codec_dai
,
503 struct snd_soc_codec
*codec
= codec_dai
->codec
;
506 /* set master/slave audio interface */
507 switch (fmt
& SND_SOC_DAIFMT_MASTER_MASK
) {
508 case SND_SOC_DAIFMT_CBM_CFM
:
511 case SND_SOC_DAIFMT_CBS_CFS
:
517 /* interface format */
518 switch (fmt
& SND_SOC_DAIFMT_FORMAT_MASK
) {
519 case SND_SOC_DAIFMT_I2S
:
522 case SND_SOC_DAIFMT_RIGHT_J
:
524 case SND_SOC_DAIFMT_LEFT_J
:
527 case SND_SOC_DAIFMT_DSP_A
:
530 case SND_SOC_DAIFMT_DSP_B
:
537 /* clock inversion */
538 switch (fmt
& SND_SOC_DAIFMT_INV_MASK
) {
539 case SND_SOC_DAIFMT_NB_NF
:
541 case SND_SOC_DAIFMT_IB_IF
:
544 case SND_SOC_DAIFMT_IB_NF
:
547 case SND_SOC_DAIFMT_NB_IF
:
555 snd_soc_write(codec
, WM8960_IFACE1
, iface
);
574 /* -1 for reserved value */
575 static const int sysclk_divs
[] = { 1, -1, 2, -1 };
577 /* Multiply 256 for internal 256 div */
578 static const int dac_divs
[] = { 256, 384, 512, 768, 1024, 1408, 1536 };
580 /* Multiply 10 to eliminate decimials */
581 static const int bclk_divs
[] = {
582 10, 15, 20, 30, 40, 55, 60, 80, 110,
583 120, 160, 220, 240, 320, 320, 320
586 static int wm8960_configure_clocking(struct snd_soc_codec
*codec
)
588 struct wm8960_priv
*wm8960
= snd_soc_codec_get_drvdata(codec
);
589 int sysclk
, bclk
, lrclk
, freq_out
, freq_in
;
590 u16 iface1
= snd_soc_read(codec
, WM8960_IFACE1
);
593 if (!(iface1
& (1<<6))) {
595 "Codec is slave mode, no need to configure clock\n");
599 if (wm8960
->clk_id
!= WM8960_SYSCLK_MCLK
&& !wm8960
->freq_in
) {
600 dev_err(codec
->dev
, "No MCLK configured\n");
604 freq_in
= wm8960
->freq_in
;
606 lrclk
= wm8960
->lrclk
;
608 * If it's sysclk auto mode, check if the MCLK can provide sysclk or
609 * not. If MCLK can provide sysclk, using MCLK to provide sysclk
610 * directly. Otherwise, auto select a available pll out frequency
613 if (wm8960
->clk_id
== WM8960_SYSCLK_AUTO
) {
614 /* disable the PLL and using MCLK to provide sysclk */
615 wm8960_set_pll(codec
, 0, 0);
617 } else if (wm8960
->sysclk
) {
618 freq_out
= wm8960
->sysclk
;
620 dev_err(codec
->dev
, "No SYSCLK configured\n");
624 /* check if the sysclk frequency is available. */
625 for (i
= 0; i
< ARRAY_SIZE(sysclk_divs
); ++i
) {
626 if (sysclk_divs
[i
] == -1)
628 sysclk
= freq_out
/ sysclk_divs
[i
];
629 for (j
= 0; j
< ARRAY_SIZE(dac_divs
); ++j
) {
630 if (sysclk
== dac_divs
[j
] * lrclk
) {
631 for (k
= 0; k
< ARRAY_SIZE(bclk_divs
); ++k
)
632 if (sysclk
== bclk
* bclk_divs
[k
] / 10)
634 if (k
!= ARRAY_SIZE(bclk_divs
))
638 if (j
!= ARRAY_SIZE(dac_divs
))
642 if (i
!= ARRAY_SIZE(sysclk_divs
)) {
643 goto configure_clock
;
644 } else if (wm8960
->clk_id
!= WM8960_SYSCLK_AUTO
) {
645 dev_err(codec
->dev
, "failed to configure clock\n");
648 /* get a available pll out frequency and set pll */
649 for (i
= 0; i
< ARRAY_SIZE(sysclk_divs
); ++i
) {
650 if (sysclk_divs
[i
] == -1)
652 for (j
= 0; j
< ARRAY_SIZE(dac_divs
); ++j
) {
653 sysclk
= lrclk
* dac_divs
[j
];
654 freq_out
= sysclk
* sysclk_divs
[i
];
656 for (k
= 0; k
< ARRAY_SIZE(bclk_divs
); ++k
) {
657 if (sysclk
== bclk
* bclk_divs
[k
] / 10 &&
658 is_pll_freq_available(freq_in
, freq_out
)) {
659 wm8960_set_pll(codec
,
666 if (k
!= ARRAY_SIZE(bclk_divs
))
669 if (j
!= ARRAY_SIZE(dac_divs
))
673 if (i
== ARRAY_SIZE(sysclk_divs
)) {
674 dev_err(codec
->dev
, "failed to configure clock\n");
679 /* configure sysclk clock */
680 snd_soc_update_bits(codec
, WM8960_CLOCK1
, 3 << 1, i
<< 1);
682 /* configure frame clock */
683 snd_soc_update_bits(codec
, WM8960_CLOCK1
, 0x7 << 3, j
<< 3);
684 snd_soc_update_bits(codec
, WM8960_CLOCK1
, 0x7 << 6, j
<< 6);
686 /* configure bit clock */
687 snd_soc_update_bits(codec
, WM8960_CLOCK2
, 0xf, k
);
692 static int wm8960_hw_params(struct snd_pcm_substream
*substream
,
693 struct snd_pcm_hw_params
*params
,
694 struct snd_soc_dai
*dai
)
696 struct snd_soc_codec
*codec
= dai
->codec
;
697 struct wm8960_priv
*wm8960
= snd_soc_codec_get_drvdata(codec
);
698 u16 iface
= snd_soc_read(codec
, WM8960_IFACE1
) & 0xfff3;
699 bool tx
= substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
;
702 wm8960
->bclk
= snd_soc_params_to_bclk(params
);
703 if (params_channels(params
) == 1)
707 switch (params_width(params
)) {
717 /* right justify mode does not support 32 word length */
718 if ((iface
& 0x3) != 0) {
723 dev_err(codec
->dev
, "unsupported width %d\n",
724 params_width(params
));
728 wm8960
->lrclk
= params_rate(params
);
729 /* Update filters for the new rate */
731 wm8960_set_deemph(codec
);
733 for (i
= 0; i
< ARRAY_SIZE(alc_rates
); i
++)
734 if (alc_rates
[i
].rate
== params_rate(params
))
735 snd_soc_update_bits(codec
,
741 snd_soc_write(codec
, WM8960_IFACE1
, iface
);
743 wm8960
->is_stream_in_use
[tx
] = true;
745 if (snd_soc_codec_get_bias_level(codec
) == SND_SOC_BIAS_ON
&&
746 !wm8960
->is_stream_in_use
[!tx
])
747 return wm8960_configure_clocking(codec
);
752 static int wm8960_hw_free(struct snd_pcm_substream
*substream
,
753 struct snd_soc_dai
*dai
)
755 struct snd_soc_codec
*codec
= dai
->codec
;
756 struct wm8960_priv
*wm8960
= snd_soc_codec_get_drvdata(codec
);
757 bool tx
= substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
;
759 wm8960
->is_stream_in_use
[tx
] = false;
764 static int wm8960_mute(struct snd_soc_dai
*dai
, int mute
)
766 struct snd_soc_codec
*codec
= dai
->codec
;
769 snd_soc_update_bits(codec
, WM8960_DACCTL1
, 0x8, 0x8);
771 snd_soc_update_bits(codec
, WM8960_DACCTL1
, 0x8, 0);
775 static int wm8960_set_bias_level_out3(struct snd_soc_codec
*codec
,
776 enum snd_soc_bias_level level
)
778 struct wm8960_priv
*wm8960
= snd_soc_codec_get_drvdata(codec
);
779 u16 pm2
= snd_soc_read(codec
, WM8960_POWER2
);
783 case SND_SOC_BIAS_ON
:
786 case SND_SOC_BIAS_PREPARE
:
787 switch (snd_soc_codec_get_bias_level(codec
)) {
788 case SND_SOC_BIAS_STANDBY
:
789 if (!IS_ERR(wm8960
->mclk
)) {
790 ret
= clk_prepare_enable(wm8960
->mclk
);
793 "Failed to enable MCLK: %d\n",
799 ret
= wm8960_configure_clocking(codec
);
803 /* Set VMID to 2x50k */
804 snd_soc_update_bits(codec
, WM8960_POWER1
, 0x180, 0x80);
807 case SND_SOC_BIAS_ON
:
809 * If it's sysclk auto mode, and the pll is enabled,
812 if (wm8960
->clk_id
== WM8960_SYSCLK_AUTO
&& (pm2
& 0x1))
813 wm8960_set_pll(codec
, 0, 0);
815 if (!IS_ERR(wm8960
->mclk
))
816 clk_disable_unprepare(wm8960
->mclk
);
825 case SND_SOC_BIAS_STANDBY
:
826 if (snd_soc_codec_get_bias_level(codec
) == SND_SOC_BIAS_OFF
) {
827 regcache_sync(wm8960
->regmap
);
829 /* Enable anti-pop features */
830 snd_soc_write(codec
, WM8960_APOP1
,
831 WM8960_POBCTRL
| WM8960_SOFT_ST
|
832 WM8960_BUFDCOPEN
| WM8960_BUFIOEN
);
834 /* Enable & ramp VMID at 2x50k */
835 snd_soc_update_bits(codec
, WM8960_POWER1
, 0x80, 0x80);
839 snd_soc_update_bits(codec
, WM8960_POWER1
, WM8960_VREF
,
842 /* Disable anti-pop features */
843 snd_soc_write(codec
, WM8960_APOP1
, WM8960_BUFIOEN
);
846 /* Set VMID to 2x250k */
847 snd_soc_update_bits(codec
, WM8960_POWER1
, 0x180, 0x100);
850 case SND_SOC_BIAS_OFF
:
851 /* Enable anti-pop features */
852 snd_soc_write(codec
, WM8960_APOP1
,
853 WM8960_POBCTRL
| WM8960_SOFT_ST
|
854 WM8960_BUFDCOPEN
| WM8960_BUFIOEN
);
856 /* Disable VMID and VREF, let them discharge */
857 snd_soc_write(codec
, WM8960_POWER1
, 0);
865 static int wm8960_set_bias_level_capless(struct snd_soc_codec
*codec
,
866 enum snd_soc_bias_level level
)
868 struct wm8960_priv
*wm8960
= snd_soc_codec_get_drvdata(codec
);
869 u16 pm2
= snd_soc_read(codec
, WM8960_POWER2
);
873 case SND_SOC_BIAS_ON
:
876 case SND_SOC_BIAS_PREPARE
:
877 switch (snd_soc_codec_get_bias_level(codec
)) {
878 case SND_SOC_BIAS_STANDBY
:
879 /* Enable anti pop mode */
880 snd_soc_update_bits(codec
, WM8960_APOP1
,
881 WM8960_POBCTRL
| WM8960_SOFT_ST
|
883 WM8960_POBCTRL
| WM8960_SOFT_ST
|
886 /* Enable LOUT1, ROUT1 and OUT3 if they're enabled */
888 if (wm8960
->lout1
&& wm8960
->lout1
->power
)
889 reg
|= WM8960_PWR2_LOUT1
;
890 if (wm8960
->rout1
&& wm8960
->rout1
->power
)
891 reg
|= WM8960_PWR2_ROUT1
;
892 if (wm8960
->out3
&& wm8960
->out3
->power
)
893 reg
|= WM8960_PWR2_OUT3
;
894 snd_soc_update_bits(codec
, WM8960_POWER2
,
897 WM8960_PWR2_OUT3
, reg
);
899 /* Enable VMID at 2*50k */
900 snd_soc_update_bits(codec
, WM8960_POWER1
,
901 WM8960_VMID_MASK
, 0x80);
907 snd_soc_update_bits(codec
, WM8960_POWER1
,
908 WM8960_VREF
, WM8960_VREF
);
912 if (!IS_ERR(wm8960
->mclk
)) {
913 ret
= clk_prepare_enable(wm8960
->mclk
);
916 "Failed to enable MCLK: %d\n",
922 ret
= wm8960_configure_clocking(codec
);
928 case SND_SOC_BIAS_ON
:
930 * If it's sysclk auto mode, and the pll is enabled,
933 if (wm8960
->clk_id
== WM8960_SYSCLK_AUTO
&& (pm2
& 0x1))
934 wm8960_set_pll(codec
, 0, 0);
936 if (!IS_ERR(wm8960
->mclk
))
937 clk_disable_unprepare(wm8960
->mclk
);
939 /* Enable anti-pop mode */
940 snd_soc_update_bits(codec
, WM8960_APOP1
,
941 WM8960_POBCTRL
| WM8960_SOFT_ST
|
943 WM8960_POBCTRL
| WM8960_SOFT_ST
|
946 /* Disable VMID and VREF */
947 snd_soc_update_bits(codec
, WM8960_POWER1
,
948 WM8960_VREF
| WM8960_VMID_MASK
, 0);
951 case SND_SOC_BIAS_OFF
:
952 regcache_sync(wm8960
->regmap
);
959 case SND_SOC_BIAS_STANDBY
:
960 switch (snd_soc_codec_get_bias_level(codec
)) {
961 case SND_SOC_BIAS_PREPARE
:
962 /* Disable HP discharge */
963 snd_soc_update_bits(codec
, WM8960_APOP2
,
964 WM8960_DISOP
| WM8960_DRES_MASK
,
967 /* Disable anti-pop features */
968 snd_soc_update_bits(codec
, WM8960_APOP1
,
969 WM8960_POBCTRL
| WM8960_SOFT_ST
|
971 WM8960_POBCTRL
| WM8960_SOFT_ST
|
980 case SND_SOC_BIAS_OFF
:
994 static bool is_pll_freq_available(unsigned int source
, unsigned int target
)
998 if (source
== 0 || target
== 0)
1001 /* Scale up target to PLL operating frequency */
1003 Ndiv
= target
/ source
;
1007 Ndiv
= target
/ source
;
1010 if ((Ndiv
< 6) || (Ndiv
> 12))
1016 /* The size in bits of the pll divide multiplied by 10
1017 * to allow rounding later */
1018 #define FIXED_PLL_SIZE ((1 << 24) * 10)
1020 static int pll_factors(unsigned int source
, unsigned int target
,
1021 struct _pll_div
*pll_div
)
1023 unsigned long long Kpart
;
1024 unsigned int K
, Ndiv
, Nmod
;
1026 pr_debug("WM8960 PLL: setting %dHz->%dHz\n", source
, target
);
1028 /* Scale up target to PLL operating frequency */
1031 Ndiv
= target
/ source
;
1034 pll_div
->pre_div
= 1;
1035 Ndiv
= target
/ source
;
1037 pll_div
->pre_div
= 0;
1039 if ((Ndiv
< 6) || (Ndiv
> 12)) {
1040 pr_err("WM8960 PLL: Unsupported N=%d\n", Ndiv
);
1045 Nmod
= target
% source
;
1046 Kpart
= FIXED_PLL_SIZE
* (long long)Nmod
;
1048 do_div(Kpart
, source
);
1050 K
= Kpart
& 0xFFFFFFFF;
1052 /* Check if we need to round */
1056 /* Move down to proper range now rounding is done */
1061 pr_debug("WM8960 PLL: N=%x K=%x pre_div=%d\n",
1062 pll_div
->n
, pll_div
->k
, pll_div
->pre_div
);
1067 static int wm8960_set_pll(struct snd_soc_codec
*codec
,
1068 unsigned int freq_in
, unsigned int freq_out
)
1071 static struct _pll_div pll_div
;
1074 if (freq_in
&& freq_out
) {
1075 ret
= pll_factors(freq_in
, freq_out
, &pll_div
);
1080 /* Disable the PLL: even if we are changing the frequency the
1081 * PLL needs to be disabled while we do so. */
1082 snd_soc_update_bits(codec
, WM8960_CLOCK1
, 0x1, 0);
1083 snd_soc_update_bits(codec
, WM8960_POWER2
, 0x1, 0);
1085 if (!freq_in
|| !freq_out
)
1088 reg
= snd_soc_read(codec
, WM8960_PLL1
) & ~0x3f;
1089 reg
|= pll_div
.pre_div
<< 4;
1095 snd_soc_write(codec
, WM8960_PLL2
, (pll_div
.k
>> 16) & 0xff);
1096 snd_soc_write(codec
, WM8960_PLL3
, (pll_div
.k
>> 8) & 0xff);
1097 snd_soc_write(codec
, WM8960_PLL4
, pll_div
.k
& 0xff);
1099 snd_soc_write(codec
, WM8960_PLL1
, reg
);
1102 snd_soc_update_bits(codec
, WM8960_POWER2
, 0x1, 0x1);
1104 snd_soc_update_bits(codec
, WM8960_CLOCK1
, 0x1, 0x1);
1109 static int wm8960_set_dai_pll(struct snd_soc_dai
*codec_dai
, int pll_id
,
1110 int source
, unsigned int freq_in
, unsigned int freq_out
)
1112 struct snd_soc_codec
*codec
= codec_dai
->codec
;
1113 struct wm8960_priv
*wm8960
= snd_soc_codec_get_drvdata(codec
);
1115 wm8960
->freq_in
= freq_in
;
1117 if (pll_id
== WM8960_SYSCLK_AUTO
)
1120 return wm8960_set_pll(codec
, freq_in
, freq_out
);
1123 static int wm8960_set_dai_clkdiv(struct snd_soc_dai
*codec_dai
,
1124 int div_id
, int div
)
1126 struct snd_soc_codec
*codec
= codec_dai
->codec
;
1130 case WM8960_SYSCLKDIV
:
1131 reg
= snd_soc_read(codec
, WM8960_CLOCK1
) & 0x1f9;
1132 snd_soc_write(codec
, WM8960_CLOCK1
, reg
| div
);
1135 reg
= snd_soc_read(codec
, WM8960_CLOCK1
) & 0x1c7;
1136 snd_soc_write(codec
, WM8960_CLOCK1
, reg
| div
);
1138 case WM8960_OPCLKDIV
:
1139 reg
= snd_soc_read(codec
, WM8960_PLL1
) & 0x03f;
1140 snd_soc_write(codec
, WM8960_PLL1
, reg
| div
);
1142 case WM8960_DCLKDIV
:
1143 reg
= snd_soc_read(codec
, WM8960_CLOCK2
) & 0x03f;
1144 snd_soc_write(codec
, WM8960_CLOCK2
, reg
| div
);
1146 case WM8960_TOCLKSEL
:
1147 reg
= snd_soc_read(codec
, WM8960_ADDCTL1
) & 0x1fd;
1148 snd_soc_write(codec
, WM8960_ADDCTL1
, reg
| div
);
1157 static int wm8960_set_bias_level(struct snd_soc_codec
*codec
,
1158 enum snd_soc_bias_level level
)
1160 struct wm8960_priv
*wm8960
= snd_soc_codec_get_drvdata(codec
);
1162 return wm8960
->set_bias_level(codec
, level
);
1165 static int wm8960_set_dai_sysclk(struct snd_soc_dai
*dai
, int clk_id
,
1166 unsigned int freq
, int dir
)
1168 struct snd_soc_codec
*codec
= dai
->codec
;
1169 struct wm8960_priv
*wm8960
= snd_soc_codec_get_drvdata(codec
);
1172 case WM8960_SYSCLK_MCLK
:
1173 snd_soc_update_bits(codec
, WM8960_CLOCK1
,
1174 0x1, WM8960_SYSCLK_MCLK
);
1176 case WM8960_SYSCLK_PLL
:
1177 snd_soc_update_bits(codec
, WM8960_CLOCK1
,
1178 0x1, WM8960_SYSCLK_PLL
);
1180 case WM8960_SYSCLK_AUTO
:
1186 wm8960
->sysclk
= freq
;
1187 wm8960
->clk_id
= clk_id
;
1192 #define WM8960_RATES SNDRV_PCM_RATE_8000_48000
1194 #define WM8960_FORMATS \
1195 (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
1196 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
1198 static const struct snd_soc_dai_ops wm8960_dai_ops
= {
1199 .hw_params
= wm8960_hw_params
,
1200 .hw_free
= wm8960_hw_free
,
1201 .digital_mute
= wm8960_mute
,
1202 .set_fmt
= wm8960_set_dai_fmt
,
1203 .set_clkdiv
= wm8960_set_dai_clkdiv
,
1204 .set_pll
= wm8960_set_dai_pll
,
1205 .set_sysclk
= wm8960_set_dai_sysclk
,
1208 static struct snd_soc_dai_driver wm8960_dai
= {
1209 .name
= "wm8960-hifi",
1211 .stream_name
= "Playback",
1214 .rates
= WM8960_RATES
,
1215 .formats
= WM8960_FORMATS
,},
1217 .stream_name
= "Capture",
1220 .rates
= WM8960_RATES
,
1221 .formats
= WM8960_FORMATS
,},
1222 .ops
= &wm8960_dai_ops
,
1223 .symmetric_rates
= 1,
1226 static int wm8960_probe(struct snd_soc_codec
*codec
)
1228 struct wm8960_priv
*wm8960
= snd_soc_codec_get_drvdata(codec
);
1229 struct wm8960_data
*pdata
= &wm8960
->pdata
;
1232 wm8960
->set_bias_level
= wm8960_set_bias_level_capless
;
1234 wm8960
->set_bias_level
= wm8960_set_bias_level_out3
;
1236 snd_soc_add_codec_controls(codec
, wm8960_snd_controls
,
1237 ARRAY_SIZE(wm8960_snd_controls
));
1238 wm8960_add_widgets(codec
);
1243 static struct snd_soc_codec_driver soc_codec_dev_wm8960
= {
1244 .probe
= wm8960_probe
,
1245 .set_bias_level
= wm8960_set_bias_level
,
1246 .suspend_bias_off
= true,
1249 static const struct regmap_config wm8960_regmap
= {
1252 .max_register
= WM8960_PLL4
,
1254 .reg_defaults
= wm8960_reg_defaults
,
1255 .num_reg_defaults
= ARRAY_SIZE(wm8960_reg_defaults
),
1256 .cache_type
= REGCACHE_RBTREE
,
1258 .volatile_reg
= wm8960_volatile
,
1261 static void wm8960_set_pdata_from_of(struct i2c_client
*i2c
,
1262 struct wm8960_data
*pdata
)
1264 const struct device_node
*np
= i2c
->dev
.of_node
;
1266 if (of_property_read_bool(np
, "wlf,capless"))
1267 pdata
->capless
= true;
1269 if (of_property_read_bool(np
, "wlf,shared-lrclk"))
1270 pdata
->shared_lrclk
= true;
1273 static int wm8960_i2c_probe(struct i2c_client
*i2c
,
1274 const struct i2c_device_id
*id
)
1276 struct wm8960_data
*pdata
= dev_get_platdata(&i2c
->dev
);
1277 struct wm8960_priv
*wm8960
;
1280 wm8960
= devm_kzalloc(&i2c
->dev
, sizeof(struct wm8960_priv
),
1285 wm8960
->mclk
= devm_clk_get(&i2c
->dev
, "mclk");
1286 if (IS_ERR(wm8960
->mclk
)) {
1287 if (PTR_ERR(wm8960
->mclk
) == -EPROBE_DEFER
)
1288 return -EPROBE_DEFER
;
1291 wm8960
->regmap
= devm_regmap_init_i2c(i2c
, &wm8960_regmap
);
1292 if (IS_ERR(wm8960
->regmap
))
1293 return PTR_ERR(wm8960
->regmap
);
1296 memcpy(&wm8960
->pdata
, pdata
, sizeof(struct wm8960_data
));
1297 else if (i2c
->dev
.of_node
)
1298 wm8960_set_pdata_from_of(i2c
, &wm8960
->pdata
);
1300 ret
= wm8960_reset(wm8960
->regmap
);
1302 dev_err(&i2c
->dev
, "Failed to issue reset\n");
1306 if (wm8960
->pdata
.shared_lrclk
) {
1307 ret
= regmap_update_bits(wm8960
->regmap
, WM8960_ADDCTL2
,
1310 dev_err(&i2c
->dev
, "Failed to enable LRCM: %d\n",
1316 /* Latch the update bits */
1317 regmap_update_bits(wm8960
->regmap
, WM8960_LINVOL
, 0x100, 0x100);
1318 regmap_update_bits(wm8960
->regmap
, WM8960_RINVOL
, 0x100, 0x100);
1319 regmap_update_bits(wm8960
->regmap
, WM8960_LADC
, 0x100, 0x100);
1320 regmap_update_bits(wm8960
->regmap
, WM8960_RADC
, 0x100, 0x100);
1321 regmap_update_bits(wm8960
->regmap
, WM8960_LDAC
, 0x100, 0x100);
1322 regmap_update_bits(wm8960
->regmap
, WM8960_RDAC
, 0x100, 0x100);
1323 regmap_update_bits(wm8960
->regmap
, WM8960_LOUT1
, 0x100, 0x100);
1324 regmap_update_bits(wm8960
->regmap
, WM8960_ROUT1
, 0x100, 0x100);
1325 regmap_update_bits(wm8960
->regmap
, WM8960_LOUT2
, 0x100, 0x100);
1326 regmap_update_bits(wm8960
->regmap
, WM8960_ROUT2
, 0x100, 0x100);
1328 i2c_set_clientdata(i2c
, wm8960
);
1330 ret
= snd_soc_register_codec(&i2c
->dev
,
1331 &soc_codec_dev_wm8960
, &wm8960_dai
, 1);
1336 static int wm8960_i2c_remove(struct i2c_client
*client
)
1338 snd_soc_unregister_codec(&client
->dev
);
1342 static const struct i2c_device_id wm8960_i2c_id
[] = {
1346 MODULE_DEVICE_TABLE(i2c
, wm8960_i2c_id
);
1348 static const struct of_device_id wm8960_of_match
[] = {
1349 { .compatible
= "wlf,wm8960", },
1352 MODULE_DEVICE_TABLE(of
, wm8960_of_match
);
1354 static struct i2c_driver wm8960_i2c_driver
= {
1357 .of_match_table
= wm8960_of_match
,
1359 .probe
= wm8960_i2c_probe
,
1360 .remove
= wm8960_i2c_remove
,
1361 .id_table
= wm8960_i2c_id
,
1364 module_i2c_driver(wm8960_i2c_driver
);
1366 MODULE_DESCRIPTION("ASoC WM8960 driver");
1367 MODULE_AUTHOR("Liam Girdwood");
1368 MODULE_LICENSE("GPL");