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authorMark Brown <broonie@opensource.wolfsonmicro.com>2009-04-07 14:20:14 -0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2009-04-13 10:11:46 -0400
commitf2644a2c00a06236a9c5e85488b0680825bad39c (patch)
tree290e4a2b13cdee174bb0780403b033a61288b302 /sound/soc/codecs/wm8960.c
parenta820532002e70e3a06f1ea7133e9b02443d07382 (diff)
ASoC: Add WM8960 CODEC driver
The WM8960 is a low power, high quality stereo codec designed for portable digital audio applications. Stereo class D speaker drivers provide 1W per channel into 8W loads. Guaranteed low leakage, excellent PSRR and pop/click suppression mechanisms enable direct battery connection for the speaker supply. The device also integrates a complete microphone interface and a stereo headphone driver. External component requirements are drastically reduced as no separate microphone, speaker or headphone amplifiers are required. Advanced on-chip digital signal processing performs automatic level control for the microphone or line input. Stereo 24-bit sigma-delta ADCs and DACs are used with low power over-sampling digital interpolation and decimation filters and a flexible digital audio interface. The master clock can be input directly or generated internally by an onboard PLL, supporting most commonly-used clocking schemes. This driver was originally written by Liam Girdwood, with substantial subsequent additions and updates for feature completeness and changes in the ASoC framework from me. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/codecs/wm8960.c')
-rw-r--r--sound/soc/codecs/wm8960.c969
1 files changed, 969 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8960.c b/sound/soc/codecs/wm8960.c
new file mode 100644
index 00000000000..e224d8add17
--- /dev/null
+++ b/sound/soc/codecs/wm8960.c
@@ -0,0 +1,969 @@
1/*
2 * wm8960.c -- WM8960 ALSA SoC Audio driver
3 *
4 * Author: Liam Girdwood
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
11#include <linux/module.h>
12#include <linux/moduleparam.h>
13#include <linux/init.h>
14#include <linux/delay.h>
15#include <linux/pm.h>
16#include <linux/i2c.h>
17#include <linux/platform_device.h>
18#include <sound/core.h>
19#include <sound/pcm.h>
20#include <sound/pcm_params.h>
21#include <sound/soc.h>
22#include <sound/soc-dapm.h>
23#include <sound/initval.h>
24#include <sound/tlv.h>
25
26#include "wm8960.h"
27
28#define AUDIO_NAME "wm8960"
29
30struct snd_soc_codec_device soc_codec_dev_wm8960;
31
32/* R25 - Power 1 */
33#define WM8960_VREF 0x40
34
35/* R28 - Anti-pop 1 */
36#define WM8960_POBCTRL 0x80
37#define WM8960_BUFDCOPEN 0x10
38#define WM8960_BUFIOEN 0x08
39#define WM8960_SOFT_ST 0x04
40#define WM8960_HPSTBY 0x01
41
42/* R29 - Anti-pop 2 */
43#define WM8960_DISOP 0x40
44
45/*
46 * wm8960 register cache
47 * We can't read the WM8960 register space when we are
48 * using 2 wire for device control, so we cache them instead.
49 */
50static const u16 wm8960_reg[WM8960_CACHEREGNUM] = {
51 0x0097, 0x0097, 0x0000, 0x0000,
52 0x0000, 0x0008, 0x0000, 0x000a,
53 0x01c0, 0x0000, 0x00ff, 0x00ff,
54 0x0000, 0x0000, 0x0000, 0x0000,
55 0x0000, 0x007b, 0x0100, 0x0032,
56 0x0000, 0x00c3, 0x00c3, 0x01c0,
57 0x0000, 0x0000, 0x0000, 0x0000,
58 0x0000, 0x0000, 0x0000, 0x0000,
59 0x0100, 0x0100, 0x0050, 0x0050,
60 0x0050, 0x0050, 0x0000, 0x0000,
61 0x0000, 0x0000, 0x0040, 0x0000,
62 0x0000, 0x0050, 0x0050, 0x0000,
63 0x0002, 0x0037, 0x004d, 0x0080,
64 0x0008, 0x0031, 0x0026, 0x00e9,
65};
66
67struct wm8960_priv {
68 u16 reg_cache[WM8960_CACHEREGNUM];
69 struct snd_soc_codec codec;
70};
71
72/*
73 * read wm8960 register cache
74 */
75static inline unsigned int wm8960_read_reg_cache(struct snd_soc_codec *codec,
76 unsigned int reg)
77{
78 u16 *cache = codec->reg_cache;
79 if (reg == WM8960_RESET)
80 return 0;
81 if (reg >= WM8960_CACHEREGNUM)
82 return -1;
83 return cache[reg];
84}
85
86/*
87 * write wm8960 register cache
88 */
89static inline void wm8960_write_reg_cache(struct snd_soc_codec *codec,
90 u16 reg, unsigned int value)
91{
92 u16 *cache = codec->reg_cache;
93 if (reg >= WM8960_CACHEREGNUM)
94 return;
95 cache[reg] = value;
96}
97
98static inline unsigned int wm8960_read(struct snd_soc_codec *codec,
99 unsigned int reg)
100{
101 return wm8960_read_reg_cache(codec, reg);
102}
103
104/*
105 * write to the WM8960 register space
106 */
107static int wm8960_write(struct snd_soc_codec *codec, unsigned int reg,
108 unsigned int value)
109{
110 u8 data[2];
111
112 /* data is
113 * D15..D9 WM8960 register offset
114 * D8...D0 register data
115 */
116 data[0] = (reg << 1) | ((value >> 8) & 0x0001);
117 data[1] = value & 0x00ff;
118
119 wm8960_write_reg_cache(codec, reg, value);
120 if (codec->hw_write(codec->control_data, data, 2) == 2)
121 return 0;
122 else
123 return -EIO;
124}
125
126#define wm8960_reset(c) wm8960_write(c, WM8960_RESET, 0)
127
128/* enumerated controls */
129static const char *wm8960_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
130static const char *wm8960_polarity[] = {"No Inversion", "Left Inverted",
131 "Right Inverted", "Stereo Inversion"};
132static const char *wm8960_3d_upper_cutoff[] = {"High", "Low"};
133static const char *wm8960_3d_lower_cutoff[] = {"Low", "High"};
134static const char *wm8960_alcfunc[] = {"Off", "Right", "Left", "Stereo"};
135static const char *wm8960_alcmode[] = {"ALC", "Limiter"};
136
137static const struct soc_enum wm8960_enum[] = {
138 SOC_ENUM_SINGLE(WM8960_DACCTL1, 1, 4, wm8960_deemph),
139 SOC_ENUM_SINGLE(WM8960_DACCTL1, 5, 4, wm8960_polarity),
140 SOC_ENUM_SINGLE(WM8960_DACCTL2, 5, 4, wm8960_polarity),
141 SOC_ENUM_SINGLE(WM8960_3D, 6, 2, wm8960_3d_upper_cutoff),
142 SOC_ENUM_SINGLE(WM8960_3D, 5, 2, wm8960_3d_lower_cutoff),
143 SOC_ENUM_SINGLE(WM8960_ALC1, 7, 4, wm8960_alcfunc),
144 SOC_ENUM_SINGLE(WM8960_ALC3, 8, 2, wm8960_alcmode),
145};
146
147static const DECLARE_TLV_DB_SCALE(adc_tlv, -9700, 50, 0);
148static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 50, 1);
149static const DECLARE_TLV_DB_SCALE(bypass_tlv, -2100, 300, 0);
150static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
151
152static const struct snd_kcontrol_new wm8960_snd_controls[] = {
153SOC_DOUBLE_R_TLV("Capture Volume", WM8960_LINVOL, WM8960_RINVOL,
154 0, 63, 0, adc_tlv),
155SOC_DOUBLE_R("Capture Volume ZC Switch", WM8960_LINVOL, WM8960_RINVOL,
156 6, 1, 0),
157SOC_DOUBLE_R("Capture Switch", WM8960_LINVOL, WM8960_RINVOL,
158 7, 1, 0),
159
160SOC_DOUBLE_R_TLV("Playback Volume", WM8960_LDAC, WM8960_RDAC,
161 0, 255, 0, dac_tlv),
162
163SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8960_LOUT1, WM8960_ROUT1,
164 0, 127, 0, out_tlv),
165SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8960_LOUT1, WM8960_ROUT1,
166 7, 1, 0),
167
168SOC_DOUBLE_R_TLV("Speaker Playback Volume", WM8960_LOUT2, WM8960_ROUT2,
169 0, 127, 0, out_tlv),
170SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8960_LOUT2, WM8960_ROUT2,
171 7, 1, 0),
172SOC_SINGLE("Speaker DC Volume", WM8960_CLASSD3, 3, 5, 0),
173SOC_SINGLE("Speaker AC Volume", WM8960_CLASSD3, 0, 5, 0),
174
175SOC_SINGLE("PCM Playback -6dB Switch", WM8960_DACCTL1, 7, 1, 0),
176SOC_ENUM("ADC Polarity", wm8960_enum[1]),
177SOC_ENUM("Playback De-emphasis", wm8960_enum[0]),
178SOC_SINGLE("ADC High Pass Filter Switch", WM8960_DACCTL1, 0, 1, 0),
179
180SOC_ENUM("DAC Polarity", wm8960_enum[2]),
181
182SOC_ENUM("3D Filter Upper Cut-Off", wm8960_enum[3]),
183SOC_ENUM("3D Filter Lower Cut-Off", wm8960_enum[4]),
184SOC_SINGLE("3D Volume", WM8960_3D, 1, 15, 0),
185SOC_SINGLE("3D Switch", WM8960_3D, 0, 1, 0),
186
187SOC_ENUM("ALC Function", wm8960_enum[5]),
188SOC_SINGLE("ALC Max Gain", WM8960_ALC1, 4, 7, 0),
189SOC_SINGLE("ALC Target", WM8960_ALC1, 0, 15, 1),
190SOC_SINGLE("ALC Min Gain", WM8960_ALC2, 4, 7, 0),
191SOC_SINGLE("ALC Hold Time", WM8960_ALC2, 0, 15, 0),
192SOC_ENUM("ALC Mode", wm8960_enum[6]),
193SOC_SINGLE("ALC Decay", WM8960_ALC3, 4, 15, 0),
194SOC_SINGLE("ALC Attack", WM8960_ALC3, 0, 15, 0),
195
196SOC_SINGLE("Noise Gate Threshold", WM8960_NOISEG, 3, 31, 0),
197SOC_SINGLE("Noise Gate Switch", WM8960_NOISEG, 0, 1, 0),
198
199SOC_DOUBLE_R("ADC PCM Capture Volume", WM8960_LINPATH, WM8960_RINPATH,
200 0, 127, 0),
201
202SOC_SINGLE_TLV("Left Output Mixer Boost Bypass Volume",
203 WM8960_BYPASS1, 4, 7, 1, bypass_tlv),
204SOC_SINGLE_TLV("Left Output Mixer LINPUT3 Volume",
205 WM8960_LOUTMIX, 4, 7, 1, bypass_tlv),
206SOC_SINGLE_TLV("Right Output Mixer Boost Bypass Volume",
207 WM8960_BYPASS2, 4, 7, 1, bypass_tlv),
208SOC_SINGLE_TLV("Right Output Mixer RINPUT3 Volume",
209 WM8960_ROUTMIX, 4, 7, 1, bypass_tlv),
210};
211
212static const struct snd_kcontrol_new wm8960_lin_boost[] = {
213SOC_DAPM_SINGLE("LINPUT2 Switch", WM8960_LINPATH, 6, 1, 0),
214SOC_DAPM_SINGLE("LINPUT3 Switch", WM8960_LINPATH, 7, 1, 0),
215SOC_DAPM_SINGLE("LINPUT1 Switch", WM8960_LINPATH, 8, 1, 0),
216};
217
218static const struct snd_kcontrol_new wm8960_lin[] = {
219SOC_DAPM_SINGLE("Boost Switch", WM8960_LINPATH, 3, 1, 0),
220};
221
222static const struct snd_kcontrol_new wm8960_rin_boost[] = {
223SOC_DAPM_SINGLE("RINPUT2 Switch", WM8960_RINPATH, 6, 1, 0),
224SOC_DAPM_SINGLE("RINPUT3 Switch", WM8960_RINPATH, 7, 1, 0),
225SOC_DAPM_SINGLE("RINPUT1 Switch", WM8960_RINPATH, 8, 1, 0),
226};
227
228static const struct snd_kcontrol_new wm8960_rin[] = {
229SOC_DAPM_SINGLE("Boost Switch", WM8960_RINPATH, 3, 1, 0),
230};
231
232static const struct snd_kcontrol_new wm8960_loutput_mixer[] = {
233SOC_DAPM_SINGLE("PCM Playback Switch", WM8960_LOUTMIX, 8, 1, 0),
234SOC_DAPM_SINGLE("LINPUT3 Switch", WM8960_LOUTMIX, 7, 1, 0),
235SOC_DAPM_SINGLE("Boost Bypass Switch", WM8960_BYPASS1, 7, 1, 0),
236};
237
238static const struct snd_kcontrol_new wm8960_routput_mixer[] = {
239SOC_DAPM_SINGLE("PCM Playback Switch", WM8960_ROUTMIX, 8, 1, 0),
240SOC_DAPM_SINGLE("RINPUT3 Switch", WM8960_ROUTMIX, 7, 1, 0),
241SOC_DAPM_SINGLE("Boost Bypass Switch", WM8960_BYPASS2, 7, 1, 0),
242};
243
244static const struct snd_kcontrol_new wm8960_mono_out[] = {
245SOC_DAPM_SINGLE("Left Switch", WM8960_MONOMIX1, 7, 1, 0),
246SOC_DAPM_SINGLE("Right Switch", WM8960_MONOMIX2, 7, 1, 0),
247};
248
249static const struct snd_soc_dapm_widget wm8960_dapm_widgets[] = {
250SND_SOC_DAPM_INPUT("LINPUT1"),
251SND_SOC_DAPM_INPUT("RINPUT1"),
252SND_SOC_DAPM_INPUT("LINPUT2"),
253SND_SOC_DAPM_INPUT("RINPUT2"),
254SND_SOC_DAPM_INPUT("LINPUT3"),
255SND_SOC_DAPM_INPUT("RINPUT3"),
256
257SND_SOC_DAPM_MICBIAS("MICB", WM8960_POWER1, 1, 0),
258
259SND_SOC_DAPM_MIXER("Left Boost Mixer", WM8960_POWER1, 5, 0,
260 wm8960_lin_boost, ARRAY_SIZE(wm8960_lin_boost)),
261SND_SOC_DAPM_MIXER("Right Boost Mixer", WM8960_POWER1, 4, 0,
262 wm8960_rin_boost, ARRAY_SIZE(wm8960_rin_boost)),
263
264SND_SOC_DAPM_MIXER("Left Input Mixer", WM8960_POWER3, 5, 0,
265 wm8960_lin, ARRAY_SIZE(wm8960_lin)),
266SND_SOC_DAPM_MIXER("Right Input Mixer", WM8960_POWER3, 4, 0,
267 wm8960_rin, ARRAY_SIZE(wm8960_rin)),
268
269SND_SOC_DAPM_ADC("Left ADC", "Capture", WM8960_POWER2, 3, 0),
270SND_SOC_DAPM_ADC("Right ADC", "Capture", WM8960_POWER2, 2, 0),
271
272SND_SOC_DAPM_DAC("Left DAC", "Playback", WM8960_POWER2, 8, 0),
273SND_SOC_DAPM_DAC("Right DAC", "Playback", WM8960_POWER2, 7, 0),
274
275SND_SOC_DAPM_MIXER("Left Output Mixer", WM8960_POWER3, 3, 0,
276 &wm8960_loutput_mixer[0],
277 ARRAY_SIZE(wm8960_loutput_mixer)),
278SND_SOC_DAPM_MIXER("Right Output Mixer", WM8960_POWER3, 2, 0,
279 &wm8960_routput_mixer[0],
280 ARRAY_SIZE(wm8960_routput_mixer)),
281
282SND_SOC_DAPM_MIXER("Mono Output Mixer", WM8960_POWER2, 1, 0,
283 &wm8960_mono_out[0],
284 ARRAY_SIZE(wm8960_mono_out)),
285
286SND_SOC_DAPM_PGA("LOUT1 PGA", WM8960_POWER2, 6, 0, NULL, 0),
287SND_SOC_DAPM_PGA("ROUT1 PGA", WM8960_POWER2, 5, 0, NULL, 0),
288
289SND_SOC_DAPM_PGA("Left Speaker PGA", WM8960_POWER2, 4, 0, NULL, 0),
290SND_SOC_DAPM_PGA("Right Speaker PGA", WM8960_POWER2, 3, 0, NULL, 0),
291
292SND_SOC_DAPM_PGA("Right Speaker Output", WM8960_CLASSD1, 7, 0, NULL, 0),
293SND_SOC_DAPM_PGA("Left Speaker Output", WM8960_CLASSD1, 6, 0, NULL, 0),
294
295SND_SOC_DAPM_OUTPUT("SPK_LP"),
296SND_SOC_DAPM_OUTPUT("SPK_LN"),
297SND_SOC_DAPM_OUTPUT("HP_L"),
298SND_SOC_DAPM_OUTPUT("HP_R"),
299SND_SOC_DAPM_OUTPUT("SPK_RP"),
300SND_SOC_DAPM_OUTPUT("SPK_RN"),
301SND_SOC_DAPM_OUTPUT("OUT3"),
302};
303
304static const struct snd_soc_dapm_route audio_paths[] = {
305 { "Left Boost Mixer", "LINPUT1 Switch", "LINPUT1" },
306 { "Left Boost Mixer", "LINPUT2 Switch", "LINPUT2" },
307 { "Left Boost Mixer", "LINPUT3 Switch", "LINPUT3" },
308
309 { "Left Input Mixer", "Boost Switch", "Left Boost Mixer", },
310 { "Left Input Mixer", NULL, "LINPUT1", }, /* Really Boost Switch */
311 { "Left Input Mixer", NULL, "LINPUT2" },
312 { "Left Input Mixer", NULL, "LINPUT3" },
313
314 { "Right Boost Mixer", "RINPUT1 Switch", "RINPUT1" },
315 { "Right Boost Mixer", "RINPUT2 Switch", "RINPUT2" },
316 { "Right Boost Mixer", "RINPUT3 Switch", "RINPUT3" },
317
318 { "Right Input Mixer", "Boost Switch", "Right Boost Mixer", },
319 { "Right Input Mixer", NULL, "RINPUT1", }, /* Really Boost Switch */
320 { "Right Input Mixer", NULL, "RINPUT2" },
321 { "Right Input Mixer", NULL, "LINPUT3" },
322
323 { "Left ADC", NULL, "Left Input Mixer" },
324 { "Right ADC", NULL, "Right Input Mixer" },
325
326 { "Left Output Mixer", "LINPUT3 Switch", "LINPUT3" },
327 { "Left Output Mixer", "Boost Bypass Switch", "Left Boost Mixer"} ,
328 { "Left Output Mixer", "PCM Playback Switch", "Left DAC" },
329
330 { "Right Output Mixer", "RINPUT3 Switch", "RINPUT3" },
331 { "Right Output Mixer", "Boost Bypass Switch", "Right Boost Mixer" } ,
332 { "Right Output Mixer", "PCM Playback Switch", "Right DAC" },
333
334 { "Mono Output Mixer", "Left Switch", "Left Output Mixer" },
335 { "Mono Output Mixer", "Right Switch", "Right Output Mixer" },
336
337 { "LOUT1 PGA", NULL, "Left Output Mixer" },
338 { "ROUT1 PGA", NULL, "Right Output Mixer" },
339
340 { "HP_L", NULL, "LOUT1 PGA" },
341 { "HP_R", NULL, "ROUT1 PGA" },
342
343 { "Left Speaker PGA", NULL, "Left Output Mixer" },
344 { "Right Speaker PGA", NULL, "Right Output Mixer" },
345
346 { "Left Speaker Output", NULL, "Left Speaker PGA" },
347 { "Right Speaker Output", NULL, "Right Speaker PGA" },
348
349 { "SPK_LN", NULL, "Left Speaker Output" },
350 { "SPK_LP", NULL, "Left Speaker Output" },
351 { "SPK_RN", NULL, "Right Speaker Output" },
352 { "SPK_RP", NULL, "Right Speaker Output" },
353
354 { "OUT3", NULL, "Mono Output Mixer", }
355};
356
357static int wm8960_add_widgets(struct snd_soc_codec *codec)
358{
359 snd_soc_dapm_new_controls(codec, wm8960_dapm_widgets,
360 ARRAY_SIZE(wm8960_dapm_widgets));
361
362 snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));
363
364 snd_soc_dapm_new_widgets(codec);
365 return 0;
366}
367
368static int wm8960_set_dai_fmt(struct snd_soc_dai *codec_dai,
369 unsigned int fmt)
370{
371 struct snd_soc_codec *codec = codec_dai->codec;
372 u16 iface = 0;
373
374 /* set master/slave audio interface */
375 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
376 case SND_SOC_DAIFMT_CBM_CFM:
377 iface |= 0x0040;
378 break;
379 case SND_SOC_DAIFMT_CBS_CFS:
380 break;
381 default:
382 return -EINVAL;
383 }
384
385 /* interface format */
386 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
387 case SND_SOC_DAIFMT_I2S:
388 iface |= 0x0002;
389 break;
390 case SND_SOC_DAIFMT_RIGHT_J:
391 break;
392 case SND_SOC_DAIFMT_LEFT_J:
393 iface |= 0x0001;
394 break;
395 case SND_SOC_DAIFMT_DSP_A:
396 iface |= 0x0003;
397 break;
398 case SND_SOC_DAIFMT_DSP_B:
399 iface |= 0x0013;
400 break;
401 default:
402 return -EINVAL;
403 }
404
405 /* clock inversion */
406 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
407 case SND_SOC_DAIFMT_NB_NF:
408 break;
409 case SND_SOC_DAIFMT_IB_IF:
410 iface |= 0x0090;
411 break;
412 case SND_SOC_DAIFMT_IB_NF:
413 iface |= 0x0080;
414 break;
415 case SND_SOC_DAIFMT_NB_IF:
416 iface |= 0x0010;
417 break;
418 default:
419 return -EINVAL;
420 }
421
422 /* set iface */
423 wm8960_write(codec, WM8960_IFACE1, iface);
424 return 0;
425}
426
427static int wm8960_hw_params(struct snd_pcm_substream *substream,
428 struct snd_pcm_hw_params *params,
429 struct snd_soc_dai *dai)
430{
431 struct snd_soc_pcm_runtime *rtd = substream->private_data;
432 struct snd_soc_device *socdev = rtd->socdev;
433 struct snd_soc_codec *codec = socdev->card->codec;
434 u16 iface = wm8960_read(codec, WM8960_IFACE1) & 0xfff3;
435
436 /* bit size */
437 switch (params_format(params)) {
438 case SNDRV_PCM_FORMAT_S16_LE:
439 break;
440 case SNDRV_PCM_FORMAT_S20_3LE:
441 iface |= 0x0004;
442 break;
443 case SNDRV_PCM_FORMAT_S24_LE:
444 iface |= 0x0008;
445 break;
446 }
447
448 /* set iface */
449 wm8960_write(codec, WM8960_IFACE1, iface);
450 return 0;
451}
452
453static int wm8960_mute(struct snd_soc_dai *dai, int mute)
454{
455 struct snd_soc_codec *codec = dai->codec;
456 u16 mute_reg = wm8960_read(codec, WM8960_DACCTL1) & 0xfff7;
457
458 if (mute)
459 wm8960_write(codec, WM8960_DACCTL1, mute_reg | 0x8);
460 else
461 wm8960_write(codec, WM8960_DACCTL1, mute_reg);
462 return 0;
463}
464
465static int wm8960_set_bias_level(struct snd_soc_codec *codec,
466 enum snd_soc_bias_level level)
467{
468 struct wm8960_data *pdata = codec->dev->platform_data;
469 u16 reg;
470
471 switch (level) {
472 case SND_SOC_BIAS_ON:
473 break;
474
475 case SND_SOC_BIAS_PREPARE:
476 /* Set VMID to 2x50k */
477 reg = wm8960_read(codec, WM8960_POWER1);
478 reg &= ~0x180;
479 reg |= 0x80;
480 wm8960_write(codec, WM8960_POWER1, reg);
481 break;
482
483 case SND_SOC_BIAS_STANDBY:
484 if (codec->bias_level == SND_SOC_BIAS_OFF) {
485 /* Enable anti-pop features */
486 wm8960_write(codec, WM8960_APOP1,
487 WM8960_POBCTRL | WM8960_SOFT_ST |
488 WM8960_BUFDCOPEN | WM8960_BUFIOEN);
489
490 /* Discharge HP output */
491 reg = WM8960_DISOP;
492 if (pdata)
493 reg |= pdata->dres << 4;
494 wm8960_write(codec, WM8960_APOP2, reg);
495
496 msleep(400);
497
498 wm8960_write(codec, WM8960_APOP2, 0);
499
500 /* Enable & ramp VMID at 2x50k */
501 reg = wm8960_read(codec, WM8960_POWER1);
502 reg |= 0x80;
503 wm8960_write(codec, WM8960_POWER1, reg);
504 msleep(100);
505
506 /* Enable VREF */
507 wm8960_write(codec, WM8960_POWER1, reg | WM8960_VREF);
508
509 /* Disable anti-pop features */
510 wm8960_write(codec, WM8960_APOP1, WM8960_BUFIOEN);
511 }
512
513 /* Set VMID to 2x250k */
514 reg = wm8960_read(codec, WM8960_POWER1);
515 reg &= ~0x180;
516 reg |= 0x100;
517 wm8960_write(codec, WM8960_POWER1, reg);
518 break;
519
520 case SND_SOC_BIAS_OFF:
521 /* Enable anti-pop features */
522 wm8960_write(codec, WM8960_APOP1,
523 WM8960_POBCTRL | WM8960_SOFT_ST |
524 WM8960_BUFDCOPEN | WM8960_BUFIOEN);
525
526 /* Disable VMID and VREF, let them discharge */
527 wm8960_write(codec, WM8960_POWER1, 0);
528 msleep(600);
529
530 wm8960_write(codec, WM8960_APOP1, 0);
531 break;
532 }
533
534 codec->bias_level = level;
535
536 return 0;
537}
538
539/* PLL divisors */
540struct _pll_div {
541 u32 pre_div:1;
542 u32 n:4;
543 u32 k:24;
544};
545
546/* The size in bits of the pll divide multiplied by 10
547 * to allow rounding later */
548#define FIXED_PLL_SIZE ((1 << 24) * 10)
549
550static int pll_factors(unsigned int source, unsigned int target,
551 struct _pll_div *pll_div)
552{
553 unsigned long long Kpart;
554 unsigned int K, Ndiv, Nmod;
555
556 pr_debug("WM8960 PLL: setting %dHz->%dHz\n", source, target);
557
558 /* Scale up target to PLL operating frequency */
559 target *= 4;
560
561 Ndiv = target / source;
562 if (Ndiv < 6) {
563 source >>= 1;
564 pll_div->pre_div = 1;
565 Ndiv = target / source;
566 } else
567 pll_div->pre_div = 0;
568
569 if ((Ndiv < 6) || (Ndiv > 12)) {
570 pr_err("WM8960 PLL: Unsupported N=%d\n", Ndiv);
571 return -EINVAL;
572 }
573
574 pll_div->n = Ndiv;
575 Nmod = target % source;
576 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
577
578 do_div(Kpart, source);
579
580 K = Kpart & 0xFFFFFFFF;
581
582 /* Check if we need to round */
583 if ((K % 10) >= 5)
584 K += 5;
585
586 /* Move down to proper range now rounding is done */
587 K /= 10;
588
589 pll_div->k = K;
590
591 pr_debug("WM8960 PLL: N=%x K=%x pre_div=%d\n",
592 pll_div->n, pll_div->k, pll_div->pre_div);
593
594 return 0;
595}
596
597static int wm8960_set_dai_pll(struct snd_soc_dai *codec_dai,
598 int pll_id, unsigned int freq_in, unsigned int freq_out)
599{
600 struct snd_soc_codec *codec = codec_dai->codec;
601 u16 reg;
602 static struct _pll_div pll_div;
603 int ret;
604
605 if (freq_in && freq_out) {
606 ret = pll_factors(freq_in, freq_out, &pll_div);
607 if (ret != 0)
608 return ret;
609 }
610
611 /* Disable the PLL: even if we are changing the frequency the
612 * PLL needs to be disabled while we do so. */
613 wm8960_write(codec, WM8960_CLOCK1,
614 wm8960_read(codec, WM8960_CLOCK1) & ~1);
615 wm8960_write(codec, WM8960_POWER2,
616 wm8960_read(codec, WM8960_POWER2) & ~1);
617
618 if (!freq_in || !freq_out)
619 return 0;
620
621 reg = wm8960_read(codec, WM8960_PLL1) & ~0x3f;
622 reg |= pll_div.pre_div << 4;
623 reg |= pll_div.n;
624
625 if (pll_div.k) {
626 reg |= 0x20;
627
628 wm8960_write(codec, WM8960_PLL2, (pll_div.k >> 18) & 0x3f);
629 wm8960_write(codec, WM8960_PLL3, (pll_div.k >> 9) & 0x1ff);
630 wm8960_write(codec, WM8960_PLL4, pll_div.k & 0x1ff);
631 }
632 wm8960_write(codec, WM8960_PLL1, reg);
633
634 /* Turn it on */
635 wm8960_write(codec, WM8960_POWER2,
636 wm8960_read(codec, WM8960_POWER2) | 1);
637 msleep(250);
638 wm8960_write(codec, WM8960_CLOCK1,
639 wm8960_read(codec, WM8960_CLOCK1) | 1);
640
641 return 0;
642}
643
644static int wm8960_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
645 int div_id, int div)
646{
647 struct snd_soc_codec *codec = codec_dai->codec;
648 u16 reg;
649
650 switch (div_id) {
651 case WM8960_SYSCLKSEL:
652 reg = wm8960_read(codec, WM8960_CLOCK1) & 0x1fe;
653 wm8960_write(codec, WM8960_CLOCK1, reg | div);
654 break;
655 case WM8960_SYSCLKDIV:
656 reg = wm8960_read(codec, WM8960_CLOCK1) & 0x1f9;
657 wm8960_write(codec, WM8960_CLOCK1, reg | div);
658 break;
659 case WM8960_DACDIV:
660 reg = wm8960_read(codec, WM8960_CLOCK1) & 0x1c7;
661 wm8960_write(codec, WM8960_CLOCK1, reg | div);
662 break;
663 case WM8960_OPCLKDIV:
664 reg = wm8960_read(codec, WM8960_PLL1) & 0x03f;
665 wm8960_write(codec, WM8960_PLL1, reg | div);
666 break;
667 case WM8960_DCLKDIV:
668 reg = wm8960_read(codec, WM8960_CLOCK2) & 0x03f;
669 wm8960_write(codec, WM8960_CLOCK2, reg | div);
670 break;
671 case WM8960_TOCLKSEL:
672 reg = wm8960_read(codec, WM8960_ADDCTL1) & 0x1fd;
673 wm8960_write(codec, WM8960_ADDCTL1, reg | div);
674 break;
675 default:
676 return -EINVAL;
677 }
678
679 return 0;
680}
681
682#define WM8960_RATES SNDRV_PCM_RATE_8000_48000
683
684#define WM8960_FORMATS \
685 (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
686 SNDRV_PCM_FMTBIT_S24_LE)
687
688static struct snd_soc_dai_ops wm8960_dai_ops = {
689 .hw_params = wm8960_hw_params,
690 .digital_mute = wm8960_mute,
691 .set_fmt = wm8960_set_dai_fmt,
692 .set_clkdiv = wm8960_set_dai_clkdiv,
693 .set_pll = wm8960_set_dai_pll,
694};
695
696struct snd_soc_dai wm8960_dai = {
697 .name = "WM8960",
698 .playback = {
699 .stream_name = "Playback",
700 .channels_min = 1,
701 .channels_max = 2,
702 .rates = WM8960_RATES,
703 .formats = WM8960_FORMATS,},
704 .capture = {
705 .stream_name = "Capture",
706 .channels_min = 1,
707 .channels_max = 2,
708 .rates = WM8960_RATES,
709 .formats = WM8960_FORMATS,},
710 .ops = &wm8960_dai_ops,
711 .symmetric_rates = 1,
712};
713EXPORT_SYMBOL_GPL(wm8960_dai);
714
715static int wm8960_suspend(struct platform_device *pdev, pm_message_t state)
716{
717 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
718 struct snd_soc_codec *codec = socdev->card->codec;
719
720 wm8960_set_bias_level(codec, SND_SOC_BIAS_OFF);
721 return 0;
722}
723
724static int wm8960_resume(struct platform_device *pdev)
725{
726 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
727 struct snd_soc_codec *codec = socdev->card->codec;
728 int i;
729 u8 data[2];
730 u16 *cache = codec->reg_cache;
731
732 /* Sync reg_cache with the hardware */
733 for (i = 0; i < ARRAY_SIZE(wm8960_reg); i++) {
734 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
735 data[1] = cache[i] & 0x00ff;
736 codec->hw_write(codec->control_data, data, 2);
737 }
738
739 wm8960_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
740 wm8960_set_bias_level(codec, codec->suspend_bias_level);
741 return 0;
742}
743
744static struct snd_soc_codec *wm8960_codec;
745
746static int wm8960_probe(struct platform_device *pdev)
747{
748 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
749 struct snd_soc_codec *codec;
750 int ret = 0;
751
752 if (wm8960_codec == NULL) {
753 dev_err(&pdev->dev, "Codec device not registered\n");
754 return -ENODEV;
755 }
756
757 socdev->card->codec = wm8960_codec;
758 codec = wm8960_codec;
759
760 /* register pcms */
761 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
762 if (ret < 0) {
763 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
764 goto pcm_err;
765 }
766
767 snd_soc_add_controls(codec, wm8960_snd_controls,
768 ARRAY_SIZE(wm8960_snd_controls));
769 wm8960_add_widgets(codec);
770 ret = snd_soc_init_card(socdev);
771 if (ret < 0) {
772 dev_err(codec->dev, "failed to register card: %d\n", ret);
773 goto card_err;
774 }
775
776 return ret;
777
778card_err:
779 snd_soc_free_pcms(socdev);
780 snd_soc_dapm_free(socdev);
781pcm_err:
782 return ret;
783}
784
785/* power down chip */
786static int wm8960_remove(struct platform_device *pdev)
787{
788 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
789
790 snd_soc_free_pcms(socdev);
791 snd_soc_dapm_free(socdev);
792
793 return 0;
794}
795
796struct snd_soc_codec_device soc_codec_dev_wm8960 = {
797 .probe = wm8960_probe,
798 .remove = wm8960_remove,
799 .suspend = wm8960_suspend,
800 .resume = wm8960_resume,
801};
802EXPORT_SYMBOL_GPL(soc_codec_dev_wm8960);
803
804static int wm8960_register(struct wm8960_priv *wm8960)
805{
806 struct wm8960_data *pdata = wm8960->codec.dev->platform_data;
807 struct snd_soc_codec *codec = &wm8960->codec;
808 int ret;
809 u16 reg;
810
811 if (wm8960_codec) {
812 dev_err(codec->dev, "Another WM8960 is registered\n");
813 return -EINVAL;
814 }
815
816 if (!pdata) {
817 dev_warn(codec->dev, "No platform data supplied\n");
818 } else {
819 if (pdata->dres > WM8960_DRES_MAX) {
820 dev_err(codec->dev, "Invalid DRES: %d\n", pdata->dres);
821 pdata->dres = 0;
822 }
823 }
824
825 mutex_init(&codec->mutex);
826 INIT_LIST_HEAD(&codec->dapm_widgets);
827 INIT_LIST_HEAD(&codec->dapm_paths);
828
829 codec->private_data = wm8960;
830 codec->name = "WM8960";
831 codec->owner = THIS_MODULE;
832 codec->read = wm8960_read_reg_cache;
833 codec->write = wm8960_write;
834 codec->bias_level = SND_SOC_BIAS_OFF;
835 codec->set_bias_level = wm8960_set_bias_level;
836 codec->dai = &wm8960_dai;
837 codec->num_dai = 1;
838 codec->reg_cache_size = WM8960_CACHEREGNUM;
839 codec->reg_cache = &wm8960->reg_cache;
840
841 memcpy(codec->reg_cache, wm8960_reg, sizeof(wm8960_reg));
842
843 ret = wm8960_reset(codec);
844 if (ret < 0) {
845 dev_err(codec->dev, "Failed to issue reset\n");
846 return ret;
847 }
848
849 wm8960_dai.dev = codec->dev;
850
851 wm8960_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
852
853 /* Latch the update bits */
854 reg = wm8960_read(codec, WM8960_LINVOL);
855 wm8960_write(codec, WM8960_LINVOL, reg | 0x100);
856 reg = wm8960_read(codec, WM8960_RINVOL);
857 wm8960_write(codec, WM8960_RINVOL, reg | 0x100);
858 reg = wm8960_read(codec, WM8960_LADC);
859 wm8960_write(codec, WM8960_LADC, reg | 0x100);
860 reg = wm8960_read(codec, WM8960_RADC);
861 wm8960_write(codec, WM8960_RADC, reg | 0x100);
862 reg = wm8960_read(codec, WM8960_LDAC);
863 wm8960_write(codec, WM8960_LDAC, reg | 0x100);
864 reg = wm8960_read(codec, WM8960_RDAC);
865 wm8960_write(codec, WM8960_RDAC, reg | 0x100);
866 reg = wm8960_read(codec, WM8960_LOUT1);
867 wm8960_write(codec, WM8960_LOUT1, reg | 0x100);
868 reg = wm8960_read(codec, WM8960_ROUT1);
869 wm8960_write(codec, WM8960_ROUT1, reg | 0x100);
870 reg = wm8960_read(codec, WM8960_LOUT2);
871 wm8960_write(codec, WM8960_LOUT2, reg | 0x100);
872 reg = wm8960_read(codec, WM8960_ROUT2);
873 wm8960_write(codec, WM8960_ROUT2, reg | 0x100);
874
875 wm8960_codec = codec;
876
877 ret = snd_soc_register_codec(codec);
878 if (ret != 0) {
879 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
880 return ret;
881 }
882
883 ret = snd_soc_register_dai(&wm8960_dai);
884 if (ret != 0) {
885 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
886 snd_soc_unregister_codec(codec);
887 return ret;
888 }
889
890 return 0;
891}
892
893static void wm8960_unregister(struct wm8960_priv *wm8960)
894{
895 wm8960_set_bias_level(&wm8960->codec, SND_SOC_BIAS_OFF);
896 snd_soc_unregister_dai(&wm8960_dai);
897 snd_soc_unregister_codec(&wm8960->codec);
898 kfree(wm8960);
899 wm8960_codec = NULL;
900}
901
902static __devinit int wm8960_i2c_probe(struct i2c_client *i2c,
903 const struct i2c_device_id *id)
904{
905 struct wm8960_priv *wm8960;
906 struct snd_soc_codec *codec;
907
908 wm8960 = kzalloc(sizeof(struct wm8960_priv), GFP_KERNEL);
909 if (wm8960 == NULL)
910 return -ENOMEM;
911
912 codec = &wm8960->codec;
913 codec->hw_write = (hw_write_t)i2c_master_send;
914
915 i2c_set_clientdata(i2c, wm8960);
916 codec->control_data = i2c;
917
918 codec->dev = &i2c->dev;
919
920 return wm8960_register(wm8960);
921}
922
923static __devexit int wm8960_i2c_remove(struct i2c_client *client)
924{
925 struct wm8960_priv *wm8960 = i2c_get_clientdata(client);
926 wm8960_unregister(wm8960);
927 return 0;
928}
929
930static const struct i2c_device_id wm8960_i2c_id[] = {
931 { "wm8960", 0 },
932 { }
933};
934MODULE_DEVICE_TABLE(i2c, wm8960_i2c_id);
935
936static struct i2c_driver wm8960_i2c_driver = {
937 .driver = {
938 .name = "WM8960 I2C Codec",
939 .owner = THIS_MODULE,
940 },
941 .probe = wm8960_i2c_probe,
942 .remove = __devexit_p(wm8960_i2c_remove),
943 .id_table = wm8960_i2c_id,
944};
945
946static int __init wm8960_modinit(void)
947{
948 int ret;
949
950 ret = i2c_add_driver(&wm8960_i2c_driver);
951 if (ret != 0) {
952 printk(KERN_ERR "Failed to register WM8960 I2C driver: %d\n",
953 ret);
954 }
955
956 return ret;
957}
958module_init(wm8960_modinit);
959
960static void __exit wm8960_exit(void)
961{
962 i2c_del_driver(&wm8960_i2c_driver);
963}
964module_exit(wm8960_exit);
965
966
967MODULE_DESCRIPTION("ASoC WM8960 driver");
968MODULE_AUTHOR("Liam Girdwood");
969MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-28 06:43:41 -0500