2 * wm8971.c -- WM8971 ALSA SoC Audio driver
4 * Copyright 2005 Lab126, Inc.
6 * Author: Kenneth Kiraly <kiraly@lab126.com>
8 * Based on wm8753.c by Liam Girdwood
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
16 #include <linux/module.h>
17 #include <linux/moduleparam.h>
18 #include <linux/init.h>
19 #include <linux/delay.h>
21 #include <linux/i2c.h>
22 #include <linux/platform_device.h>
23 #include <sound/core.h>
24 #include <sound/pcm.h>
25 #include <sound/pcm_params.h>
26 #include <sound/soc.h>
27 #include <sound/soc-dapm.h>
28 #include <sound/initval.h>
32 #define AUDIO_NAME "wm8971"
33 #define WM8971_VERSION "0.9"
35 #define WM8971_REG_COUNT 43
37 static struct workqueue_struct *wm8971_workq = NULL;
39 /* codec private data */
45 * wm8971 register cache
46 * We can't read the WM8971 register space when we
47 * are using 2 wire for device control, so we cache them instead.
49 static const u16 wm8971_reg[] = {
50 0x0097, 0x0097, 0x0079, 0x0079, /* 0 */
51 0x0000, 0x0008, 0x0000, 0x000a, /* 4 */
52 0x0000, 0x0000, 0x00ff, 0x00ff, /* 8 */
53 0x000f, 0x000f, 0x0000, 0x0000, /* 12 */
54 0x0000, 0x007b, 0x0000, 0x0032, /* 16 */
55 0x0000, 0x00c3, 0x00c3, 0x00c0, /* 20 */
56 0x0000, 0x0000, 0x0000, 0x0000, /* 24 */
57 0x0000, 0x0000, 0x0000, 0x0000, /* 28 */
58 0x0000, 0x0000, 0x0050, 0x0050, /* 32 */
59 0x0050, 0x0050, 0x0050, 0x0050, /* 36 */
60 0x0079, 0x0079, 0x0079, /* 40 */
63 static inline unsigned int wm8971_read_reg_cache(struct snd_soc_codec *codec,
66 u16 *cache = codec->reg_cache;
67 if (reg < WM8971_REG_COUNT)
73 static inline void wm8971_write_reg_cache(struct snd_soc_codec *codec,
74 unsigned int reg, unsigned int value)
76 u16 *cache = codec->reg_cache;
77 if (reg < WM8971_REG_COUNT)
81 static int wm8971_write(struct snd_soc_codec *codec, unsigned int reg,
87 * D15..D9 WM8753 register offset
88 * D8...D0 register data
90 data[0] = (reg << 1) | ((value >> 8) & 0x0001);
91 data[1] = value & 0x00ff;
93 wm8971_write_reg_cache (codec, reg, value);
94 if (codec->hw_write(codec->control_data, data, 2) == 2)
100 #define wm8971_reset(c) wm8971_write(c, WM8971_RESET, 0)
102 /* WM8971 Controls */
103 static const char *wm8971_bass[] = { "Linear Control", "Adaptive Boost" };
104 static const char *wm8971_bass_filter[] = { "130Hz @ 48kHz",
106 static const char *wm8971_treble[] = { "8kHz", "4kHz" };
107 static const char *wm8971_alc_func[] = { "Off", "Right", "Left", "Stereo" };
108 static const char *wm8971_ng_type[] = { "Constant PGA Gain",
110 static const char *wm8971_deemp[] = { "None", "32kHz", "44.1kHz", "48kHz" };
111 static const char *wm8971_mono_mux[] = {"Stereo", "Mono (Left)",
112 "Mono (Right)", "Digital Mono"};
113 static const char *wm8971_dac_phase[] = { "Non Inverted", "Inverted" };
114 static const char *wm8971_lline_mux[] = {"Line", "NC", "NC", "PGA",
116 static const char *wm8971_rline_mux[] = {"Line", "Mic", "NC", "PGA",
118 static const char *wm8971_lpga_sel[] = {"Line", "NC", "NC", "Differential"};
119 static const char *wm8971_rpga_sel[] = {"Line", "Mic", "NC", "Differential"};
120 static const char *wm8971_adcpol[] = {"Normal", "L Invert", "R Invert",
123 static const struct soc_enum wm8971_enum[] = {
124 SOC_ENUM_SINGLE(WM8971_BASS, 7, 2, wm8971_bass), /* 0 */
125 SOC_ENUM_SINGLE(WM8971_BASS, 6, 2, wm8971_bass_filter),
126 SOC_ENUM_SINGLE(WM8971_TREBLE, 6, 2, wm8971_treble),
127 SOC_ENUM_SINGLE(WM8971_ALC1, 7, 4, wm8971_alc_func),
128 SOC_ENUM_SINGLE(WM8971_NGATE, 1, 2, wm8971_ng_type), /* 4 */
129 SOC_ENUM_SINGLE(WM8971_ADCDAC, 1, 4, wm8971_deemp),
130 SOC_ENUM_SINGLE(WM8971_ADCTL1, 4, 4, wm8971_mono_mux),
131 SOC_ENUM_SINGLE(WM8971_ADCTL1, 1, 2, wm8971_dac_phase),
132 SOC_ENUM_SINGLE(WM8971_LOUTM1, 0, 5, wm8971_lline_mux), /* 8 */
133 SOC_ENUM_SINGLE(WM8971_ROUTM1, 0, 5, wm8971_rline_mux),
134 SOC_ENUM_SINGLE(WM8971_LADCIN, 6, 4, wm8971_lpga_sel),
135 SOC_ENUM_SINGLE(WM8971_RADCIN, 6, 4, wm8971_rpga_sel),
136 SOC_ENUM_SINGLE(WM8971_ADCDAC, 5, 4, wm8971_adcpol), /* 12 */
137 SOC_ENUM_SINGLE(WM8971_ADCIN, 6, 4, wm8971_mono_mux),
140 static const struct snd_kcontrol_new wm8971_snd_controls[] = {
141 SOC_DOUBLE_R("Capture Volume", WM8971_LINVOL, WM8971_RINVOL, 0, 63, 0),
142 SOC_DOUBLE_R("Capture ZC Switch", WM8971_LINVOL, WM8971_RINVOL,
144 SOC_DOUBLE_R("Capture Switch", WM8971_LINVOL, WM8971_RINVOL, 7, 1, 1),
146 SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8971_LOUT1V,
147 WM8971_ROUT1V, 7, 1, 0),
148 SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8971_LOUT2V,
149 WM8971_ROUT2V, 7, 1, 0),
150 SOC_SINGLE("Mono Playback ZC Switch", WM8971_MOUTV, 7, 1, 0),
152 SOC_DOUBLE_R("PCM Volume", WM8971_LDAC, WM8971_RDAC, 0, 255, 0),
154 SOC_DOUBLE_R("Bypass Left Playback Volume", WM8971_LOUTM1,
155 WM8971_LOUTM2, 4, 7, 1),
156 SOC_DOUBLE_R("Bypass Right Playback Volume", WM8971_ROUTM1,
157 WM8971_ROUTM2, 4, 7, 1),
158 SOC_DOUBLE_R("Bypass Mono Playback Volume", WM8971_MOUTM1,
159 WM8971_MOUTM2, 4, 7, 1),
161 SOC_DOUBLE_R("Headphone Playback Volume", WM8971_LOUT1V,
162 WM8971_ROUT1V, 0, 127, 0),
163 SOC_DOUBLE_R("Speaker Playback Volume", WM8971_LOUT2V,
164 WM8971_ROUT2V, 0, 127, 0),
166 SOC_ENUM("Bass Boost", wm8971_enum[0]),
167 SOC_ENUM("Bass Filter", wm8971_enum[1]),
168 SOC_SINGLE("Bass Volume", WM8971_BASS, 0, 7, 1),
170 SOC_SINGLE("Treble Volume", WM8971_TREBLE, 0, 7, 0),
171 SOC_ENUM("Treble Cut-off", wm8971_enum[2]),
173 SOC_SINGLE("Capture Filter Switch", WM8971_ADCDAC, 0, 1, 1),
175 SOC_SINGLE("ALC Target Volume", WM8971_ALC1, 0, 7, 0),
176 SOC_SINGLE("ALC Max Volume", WM8971_ALC1, 4, 7, 0),
178 SOC_SINGLE("ALC Capture Target Volume", WM8971_ALC1, 0, 7, 0),
179 SOC_SINGLE("ALC Capture Max Volume", WM8971_ALC1, 4, 7, 0),
180 SOC_ENUM("ALC Capture Function", wm8971_enum[3]),
181 SOC_SINGLE("ALC Capture ZC Switch", WM8971_ALC2, 7, 1, 0),
182 SOC_SINGLE("ALC Capture Hold Time", WM8971_ALC2, 0, 15, 0),
183 SOC_SINGLE("ALC Capture Decay Time", WM8971_ALC3, 4, 15, 0),
184 SOC_SINGLE("ALC Capture Attack Time", WM8971_ALC3, 0, 15, 0),
185 SOC_SINGLE("ALC Capture NG Threshold", WM8971_NGATE, 3, 31, 0),
186 SOC_ENUM("ALC Capture NG Type", wm8971_enum[4]),
187 SOC_SINGLE("ALC Capture NG Switch", WM8971_NGATE, 0, 1, 0),
189 SOC_SINGLE("Capture 6dB Attenuate", WM8971_ADCDAC, 8, 1, 0),
190 SOC_SINGLE("Playback 6dB Attenuate", WM8971_ADCDAC, 7, 1, 0),
192 SOC_ENUM("Playback De-emphasis", wm8971_enum[5]),
193 SOC_ENUM("Playback Function", wm8971_enum[6]),
194 SOC_ENUM("Playback Phase", wm8971_enum[7]),
196 SOC_DOUBLE_R("Mic Boost", WM8971_LADCIN, WM8971_RADCIN, 4, 3, 0),
199 /* add non-DAPM controls */
200 static int wm8971_add_controls(struct snd_soc_codec *codec)
204 for (i = 0; i < ARRAY_SIZE(wm8971_snd_controls); i++) {
205 err = snd_ctl_add(codec->card,
206 snd_soc_cnew(&wm8971_snd_controls[i],
219 static const struct snd_kcontrol_new wm8971_left_mixer_controls[] = {
220 SOC_DAPM_SINGLE("Playback Switch", WM8971_LOUTM1, 8, 1, 0),
221 SOC_DAPM_SINGLE("Left Bypass Switch", WM8971_LOUTM1, 7, 1, 0),
222 SOC_DAPM_SINGLE("Right Playback Switch", WM8971_LOUTM2, 8, 1, 0),
223 SOC_DAPM_SINGLE("Right Bypass Switch", WM8971_LOUTM2, 7, 1, 0),
227 static const struct snd_kcontrol_new wm8971_right_mixer_controls[] = {
228 SOC_DAPM_SINGLE("Left Playback Switch", WM8971_ROUTM1, 8, 1, 0),
229 SOC_DAPM_SINGLE("Left Bypass Switch", WM8971_ROUTM1, 7, 1, 0),
230 SOC_DAPM_SINGLE("Playback Switch", WM8971_ROUTM2, 8, 1, 0),
231 SOC_DAPM_SINGLE("Right Bypass Switch", WM8971_ROUTM2, 7, 1, 0),
235 static const struct snd_kcontrol_new wm8971_mono_mixer_controls[] = {
236 SOC_DAPM_SINGLE("Left Playback Switch", WM8971_MOUTM1, 8, 1, 0),
237 SOC_DAPM_SINGLE("Left Bypass Switch", WM8971_MOUTM1, 7, 1, 0),
238 SOC_DAPM_SINGLE("Right Playback Switch", WM8971_MOUTM2, 8, 1, 0),
239 SOC_DAPM_SINGLE("Right Bypass Switch", WM8971_MOUTM2, 7, 1, 0),
243 static const struct snd_kcontrol_new wm8971_left_line_controls =
244 SOC_DAPM_ENUM("Route", wm8971_enum[8]);
247 static const struct snd_kcontrol_new wm8971_right_line_controls =
248 SOC_DAPM_ENUM("Route", wm8971_enum[9]);
251 static const struct snd_kcontrol_new wm8971_left_pga_controls =
252 SOC_DAPM_ENUM("Route", wm8971_enum[10]);
255 static const struct snd_kcontrol_new wm8971_right_pga_controls =
256 SOC_DAPM_ENUM("Route", wm8971_enum[11]);
259 static const struct snd_kcontrol_new wm8971_monomux_controls =
260 SOC_DAPM_ENUM("Route", wm8971_enum[13]);
262 static const struct snd_soc_dapm_widget wm8971_dapm_widgets[] = {
263 SND_SOC_DAPM_MIXER("Left Mixer", SND_SOC_NOPM, 0, 0,
264 &wm8971_left_mixer_controls[0],
265 ARRAY_SIZE(wm8971_left_mixer_controls)),
266 SND_SOC_DAPM_MIXER("Right Mixer", SND_SOC_NOPM, 0, 0,
267 &wm8971_right_mixer_controls[0],
268 ARRAY_SIZE(wm8971_right_mixer_controls)),
269 SND_SOC_DAPM_MIXER("Mono Mixer", WM8971_PWR2, 2, 0,
270 &wm8971_mono_mixer_controls[0],
271 ARRAY_SIZE(wm8971_mono_mixer_controls)),
273 SND_SOC_DAPM_PGA("Right Out 2", WM8971_PWR2, 3, 0, NULL, 0),
274 SND_SOC_DAPM_PGA("Left Out 2", WM8971_PWR2, 4, 0, NULL, 0),
275 SND_SOC_DAPM_PGA("Right Out 1", WM8971_PWR2, 5, 0, NULL, 0),
276 SND_SOC_DAPM_PGA("Left Out 1", WM8971_PWR2, 6, 0, NULL, 0),
277 SND_SOC_DAPM_DAC("Right DAC", "Right Playback", WM8971_PWR2, 7, 0),
278 SND_SOC_DAPM_DAC("Left DAC", "Left Playback", WM8971_PWR2, 8, 0),
279 SND_SOC_DAPM_PGA("Mono Out 1", WM8971_PWR2, 2, 0, NULL, 0),
281 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8971_PWR1, 1, 0),
282 SND_SOC_DAPM_ADC("Right ADC", "Right Capture", WM8971_PWR1, 2, 0),
283 SND_SOC_DAPM_ADC("Left ADC", "Left Capture", WM8971_PWR1, 3, 0),
285 SND_SOC_DAPM_MUX("Left PGA Mux", WM8971_PWR1, 5, 0,
286 &wm8971_left_pga_controls),
287 SND_SOC_DAPM_MUX("Right PGA Mux", WM8971_PWR1, 4, 0,
288 &wm8971_right_pga_controls),
289 SND_SOC_DAPM_MUX("Left Line Mux", SND_SOC_NOPM, 0, 0,
290 &wm8971_left_line_controls),
291 SND_SOC_DAPM_MUX("Right Line Mux", SND_SOC_NOPM, 0, 0,
292 &wm8971_right_line_controls),
294 SND_SOC_DAPM_MUX("Left ADC Mux", SND_SOC_NOPM, 0, 0,
295 &wm8971_monomux_controls),
296 SND_SOC_DAPM_MUX("Right ADC Mux", SND_SOC_NOPM, 0, 0,
297 &wm8971_monomux_controls),
299 SND_SOC_DAPM_OUTPUT("LOUT1"),
300 SND_SOC_DAPM_OUTPUT("ROUT1"),
301 SND_SOC_DAPM_OUTPUT("LOUT2"),
302 SND_SOC_DAPM_OUTPUT("ROUT2"),
303 SND_SOC_DAPM_OUTPUT("MONO"),
305 SND_SOC_DAPM_INPUT("LINPUT1"),
306 SND_SOC_DAPM_INPUT("RINPUT1"),
307 SND_SOC_DAPM_INPUT("MIC"),
310 static const struct snd_soc_dapm_route audio_map[] = {
312 {"Left Mixer", "Playback Switch", "Left DAC"},
313 {"Left Mixer", "Left Bypass Switch", "Left Line Mux"},
314 {"Left Mixer", "Right Playback Switch", "Right DAC"},
315 {"Left Mixer", "Right Bypass Switch", "Right Line Mux"},
318 {"Right Mixer", "Left Playback Switch", "Left DAC"},
319 {"Right Mixer", "Left Bypass Switch", "Left Line Mux"},
320 {"Right Mixer", "Playback Switch", "Right DAC"},
321 {"Right Mixer", "Right Bypass Switch", "Right Line Mux"},
324 {"Left Out 1", NULL, "Left Mixer"},
325 {"LOUT1", NULL, "Left Out 1"},
328 {"Left Out 2", NULL, "Left Mixer"},
329 {"LOUT2", NULL, "Left Out 2"},
332 {"Right Out 1", NULL, "Right Mixer"},
333 {"ROUT1", NULL, "Right Out 1"},
336 {"Right Out 2", NULL, "Right Mixer"},
337 {"ROUT2", NULL, "Right Out 2"},
340 {"Mono Mixer", "Left Playback Switch", "Left DAC"},
341 {"Mono Mixer", "Left Bypass Switch", "Left Line Mux"},
342 {"Mono Mixer", "Right Playback Switch", "Right DAC"},
343 {"Mono Mixer", "Right Bypass Switch", "Right Line Mux"},
346 {"Mono Out", NULL, "Mono Mixer"},
347 {"MONO1", NULL, "Mono Out"},
350 {"Left Line Mux", "Line", "LINPUT1"},
351 {"Left Line Mux", "PGA", "Left PGA Mux"},
352 {"Left Line Mux", "Differential", "Differential Mux"},
355 {"Right Line Mux", "Line", "RINPUT1"},
356 {"Right Line Mux", "Mic", "MIC"},
357 {"Right Line Mux", "PGA", "Right PGA Mux"},
358 {"Right Line Mux", "Differential", "Differential Mux"},
361 {"Left PGA Mux", "Line", "LINPUT1"},
362 {"Left PGA Mux", "Differential", "Differential Mux"},
365 {"Right PGA Mux", "Line", "RINPUT1"},
366 {"Right PGA Mux", "Differential", "Differential Mux"},
368 /* Differential Mux */
369 {"Differential Mux", "Line", "LINPUT1"},
370 {"Differential Mux", "Line", "RINPUT1"},
373 {"Left ADC Mux", "Stereo", "Left PGA Mux"},
374 {"Left ADC Mux", "Mono (Left)", "Left PGA Mux"},
375 {"Left ADC Mux", "Digital Mono", "Left PGA Mux"},
378 {"Right ADC Mux", "Stereo", "Right PGA Mux"},
379 {"Right ADC Mux", "Mono (Right)", "Right PGA Mux"},
380 {"Right ADC Mux", "Digital Mono", "Right PGA Mux"},
383 {"Left ADC", NULL, "Left ADC Mux"},
384 {"Right ADC", NULL, "Right ADC Mux"},
387 static int wm8971_add_widgets(struct snd_soc_codec *codec)
389 snd_soc_dapm_new_controls(codec, wm8971_dapm_widgets,
390 ARRAY_SIZE(wm8971_dapm_widgets));
392 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
394 snd_soc_dapm_new_widgets(codec);
407 /* codec hifi mclk clock divider coefficients */
408 static const struct _coeff_div coeff_div[] = {
410 {12288000, 8000, 1536, 0x6, 0x0},
411 {11289600, 8000, 1408, 0x16, 0x0},
412 {18432000, 8000, 2304, 0x7, 0x0},
413 {16934400, 8000, 2112, 0x17, 0x0},
414 {12000000, 8000, 1500, 0x6, 0x1},
417 {11289600, 11025, 1024, 0x18, 0x0},
418 {16934400, 11025, 1536, 0x19, 0x0},
419 {12000000, 11025, 1088, 0x19, 0x1},
422 {12288000, 16000, 768, 0xa, 0x0},
423 {18432000, 16000, 1152, 0xb, 0x0},
424 {12000000, 16000, 750, 0xa, 0x1},
427 {11289600, 22050, 512, 0x1a, 0x0},
428 {16934400, 22050, 768, 0x1b, 0x0},
429 {12000000, 22050, 544, 0x1b, 0x1},
432 {12288000, 32000, 384, 0xc, 0x0},
433 {18432000, 32000, 576, 0xd, 0x0},
434 {12000000, 32000, 375, 0xa, 0x1},
437 {11289600, 44100, 256, 0x10, 0x0},
438 {16934400, 44100, 384, 0x11, 0x0},
439 {12000000, 44100, 272, 0x11, 0x1},
442 {12288000, 48000, 256, 0x0, 0x0},
443 {18432000, 48000, 384, 0x1, 0x0},
444 {12000000, 48000, 250, 0x0, 0x1},
447 {11289600, 88200, 128, 0x1e, 0x0},
448 {16934400, 88200, 192, 0x1f, 0x0},
449 {12000000, 88200, 136, 0x1f, 0x1},
452 {12288000, 96000, 128, 0xe, 0x0},
453 {18432000, 96000, 192, 0xf, 0x0},
454 {12000000, 96000, 125, 0xe, 0x1},
457 static int get_coeff(int mclk, int rate)
461 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
462 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
468 static int wm8971_set_dai_sysclk(struct snd_soc_dai *codec_dai,
469 int clk_id, unsigned int freq, int dir)
471 struct snd_soc_codec *codec = codec_dai->codec;
472 struct wm8971_priv *wm8971 = codec->private_data;
480 wm8971->sysclk = freq;
486 static int wm8971_set_dai_fmt(struct snd_soc_dai *codec_dai,
489 struct snd_soc_codec *codec = codec_dai->codec;
492 /* set master/slave audio interface */
493 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
494 case SND_SOC_DAIFMT_CBM_CFM:
497 case SND_SOC_DAIFMT_CBS_CFS:
503 /* interface format */
504 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
505 case SND_SOC_DAIFMT_I2S:
508 case SND_SOC_DAIFMT_RIGHT_J:
510 case SND_SOC_DAIFMT_LEFT_J:
513 case SND_SOC_DAIFMT_DSP_A:
516 case SND_SOC_DAIFMT_DSP_B:
523 /* clock inversion */
524 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
525 case SND_SOC_DAIFMT_NB_NF:
527 case SND_SOC_DAIFMT_IB_IF:
530 case SND_SOC_DAIFMT_IB_NF:
533 case SND_SOC_DAIFMT_NB_IF:
540 wm8971_write(codec, WM8971_IFACE, iface);
544 static int wm8971_pcm_hw_params(struct snd_pcm_substream *substream,
545 struct snd_pcm_hw_params *params)
547 struct snd_soc_pcm_runtime *rtd = substream->private_data;
548 struct snd_soc_device *socdev = rtd->socdev;
549 struct snd_soc_codec *codec = socdev->codec;
550 struct wm8971_priv *wm8971 = codec->private_data;
551 u16 iface = wm8971_read_reg_cache(codec, WM8971_IFACE) & 0x1f3;
552 u16 srate = wm8971_read_reg_cache(codec, WM8971_SRATE) & 0x1c0;
553 int coeff = get_coeff(wm8971->sysclk, params_rate(params));
556 switch (params_format(params)) {
557 case SNDRV_PCM_FORMAT_S16_LE:
559 case SNDRV_PCM_FORMAT_S20_3LE:
562 case SNDRV_PCM_FORMAT_S24_LE:
565 case SNDRV_PCM_FORMAT_S32_LE:
570 /* set iface & srate */
571 wm8971_write(codec, WM8971_IFACE, iface);
573 wm8971_write(codec, WM8971_SRATE, srate |
574 (coeff_div[coeff].sr << 1) | coeff_div[coeff].usb);
579 static int wm8971_mute(struct snd_soc_dai *dai, int mute)
581 struct snd_soc_codec *codec = dai->codec;
582 u16 mute_reg = wm8971_read_reg_cache(codec, WM8971_ADCDAC) & 0xfff7;
585 wm8971_write(codec, WM8971_ADCDAC, mute_reg | 0x8);
587 wm8971_write(codec, WM8971_ADCDAC, mute_reg);
591 static int wm8971_set_bias_level(struct snd_soc_codec *codec,
592 enum snd_soc_bias_level level)
594 u16 pwr_reg = wm8971_read_reg_cache(codec, WM8971_PWR1) & 0xfe3e;
597 case SND_SOC_BIAS_ON:
598 /* set vmid to 50k and unmute dac */
599 wm8971_write(codec, WM8971_PWR1, pwr_reg | 0x00c1);
601 case SND_SOC_BIAS_PREPARE:
603 case SND_SOC_BIAS_STANDBY:
604 /* mute dac and set vmid to 500k, enable VREF */
605 wm8971_write(codec, WM8971_PWR1, pwr_reg | 0x0140);
607 case SND_SOC_BIAS_OFF:
608 wm8971_write(codec, WM8971_PWR1, 0x0001);
611 codec->bias_level = level;
615 #define WM8971_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
616 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
617 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
619 #define WM8971_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
620 SNDRV_PCM_FMTBIT_S24_LE)
622 struct snd_soc_dai wm8971_dai = {
625 .stream_name = "Playback",
628 .rates = WM8971_RATES,
629 .formats = WM8971_FORMATS,},
631 .stream_name = "Capture",
634 .rates = WM8971_RATES,
635 .formats = WM8971_FORMATS,},
637 .hw_params = wm8971_pcm_hw_params,
640 .digital_mute = wm8971_mute,
641 .set_fmt = wm8971_set_dai_fmt,
642 .set_sysclk = wm8971_set_dai_sysclk,
645 EXPORT_SYMBOL_GPL(wm8971_dai);
647 static void wm8971_work(struct work_struct *work)
649 struct snd_soc_codec *codec =
650 container_of(work, struct snd_soc_codec, delayed_work.work);
651 wm8971_set_bias_level(codec, codec->bias_level);
654 static int wm8971_suspend(struct platform_device *pdev, pm_message_t state)
656 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
657 struct snd_soc_codec *codec = socdev->codec;
659 wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
663 static int wm8971_resume(struct platform_device *pdev)
665 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
666 struct snd_soc_codec *codec = socdev->codec;
669 u16 *cache = codec->reg_cache;
672 /* Sync reg_cache with the hardware */
673 for (i = 0; i < ARRAY_SIZE(wm8971_reg); i++) {
674 if (i + 1 == WM8971_RESET)
676 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
677 data[1] = cache[i] & 0x00ff;
678 codec->hw_write(codec->control_data, data, 2);
681 wm8971_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
683 /* charge wm8971 caps */
684 if (codec->suspend_bias_level == SND_SOC_BIAS_ON) {
685 reg = wm8971_read_reg_cache(codec, WM8971_PWR1) & 0xfe3e;
686 wm8971_write(codec, WM8971_PWR1, reg | 0x01c0);
687 codec->bias_level = SND_SOC_BIAS_ON;
688 queue_delayed_work(wm8971_workq, &codec->delayed_work,
689 msecs_to_jiffies(1000));
695 static int wm8971_init(struct snd_soc_device *socdev)
697 struct snd_soc_codec *codec = socdev->codec;
700 codec->name = "WM8971";
701 codec->owner = THIS_MODULE;
702 codec->read = wm8971_read_reg_cache;
703 codec->write = wm8971_write;
704 codec->set_bias_level = wm8971_set_bias_level;
705 codec->dai = &wm8971_dai;
706 codec->reg_cache_size = ARRAY_SIZE(wm8971_reg);
708 codec->reg_cache = kmemdup(wm8971_reg, sizeof(wm8971_reg), GFP_KERNEL);
710 if (codec->reg_cache == NULL)
716 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
718 printk(KERN_ERR "wm8971: failed to create pcms\n");
722 /* charge output caps - set vmid to 5k for quick power up */
723 reg = wm8971_read_reg_cache(codec, WM8971_PWR1) & 0xfe3e;
724 wm8971_write(codec, WM8971_PWR1, reg | 0x01c0);
725 codec->bias_level = SND_SOC_BIAS_STANDBY;
726 queue_delayed_work(wm8971_workq, &codec->delayed_work,
727 msecs_to_jiffies(1000));
729 /* set the update bits */
730 reg = wm8971_read_reg_cache(codec, WM8971_LDAC);
731 wm8971_write(codec, WM8971_LDAC, reg | 0x0100);
732 reg = wm8971_read_reg_cache(codec, WM8971_RDAC);
733 wm8971_write(codec, WM8971_RDAC, reg | 0x0100);
735 reg = wm8971_read_reg_cache(codec, WM8971_LOUT1V);
736 wm8971_write(codec, WM8971_LOUT1V, reg | 0x0100);
737 reg = wm8971_read_reg_cache(codec, WM8971_ROUT1V);
738 wm8971_write(codec, WM8971_ROUT1V, reg | 0x0100);
740 reg = wm8971_read_reg_cache(codec, WM8971_LOUT2V);
741 wm8971_write(codec, WM8971_LOUT2V, reg | 0x0100);
742 reg = wm8971_read_reg_cache(codec, WM8971_ROUT2V);
743 wm8971_write(codec, WM8971_ROUT2V, reg | 0x0100);
745 reg = wm8971_read_reg_cache(codec, WM8971_LINVOL);
746 wm8971_write(codec, WM8971_LINVOL, reg | 0x0100);
747 reg = wm8971_read_reg_cache(codec, WM8971_RINVOL);
748 wm8971_write(codec, WM8971_RINVOL, reg | 0x0100);
750 wm8971_add_controls(codec);
751 wm8971_add_widgets(codec);
752 ret = snd_soc_register_card(socdev);
754 printk(KERN_ERR "wm8971: failed to register card\n");
760 snd_soc_free_pcms(socdev);
761 snd_soc_dapm_free(socdev);
763 kfree(codec->reg_cache);
767 /* If the i2c layer weren't so broken, we could pass this kind of data
769 static struct snd_soc_device *wm8971_socdev;
771 #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
773 static int wm8971_i2c_probe(struct i2c_client *i2c,
774 const struct i2c_device_id *id)
776 struct snd_soc_device *socdev = wm8971_socdev;
777 struct snd_soc_codec *codec = socdev->codec;
780 i2c_set_clientdata(i2c, codec);
782 codec->control_data = i2c;
784 ret = wm8971_init(socdev);
786 pr_err("failed to initialise WM8971\n");
791 static int wm8971_i2c_remove(struct i2c_client *client)
793 struct snd_soc_codec *codec = i2c_get_clientdata(client);
794 kfree(codec->reg_cache);
798 static const struct i2c_device_id wm8971_i2c_id[] = {
802 MODULE_DEVICE_TABLE(i2c, wm8971_i2c_id);
804 static struct i2c_driver wm8971_i2c_driver = {
806 .name = "WM8971 I2C Codec",
807 .owner = THIS_MODULE,
809 .probe = wm8971_i2c_probe,
810 .remove = wm8971_i2c_remove,
811 .id_table = wm8971_i2c_id,
814 static int wm8971_add_i2c_device(struct platform_device *pdev,
815 const struct wm8971_setup_data *setup)
817 struct i2c_board_info info;
818 struct i2c_adapter *adapter;
819 struct i2c_client *client;
822 ret = i2c_add_driver(&wm8971_i2c_driver);
824 dev_err(&pdev->dev, "can't add i2c driver\n");
828 memset(&info, 0, sizeof(struct i2c_board_info));
829 info.addr = setup->i2c_address;
830 strlcpy(info.type, "wm8971", I2C_NAME_SIZE);
832 adapter = i2c_get_adapter(setup->i2c_bus);
834 dev_err(&pdev->dev, "can't get i2c adapter %d\n",
839 client = i2c_new_device(adapter, &info);
840 i2c_put_adapter(adapter);
842 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
843 (unsigned int)info.addr);
850 i2c_del_driver(&wm8971_i2c_driver);
856 static int wm8971_probe(struct platform_device *pdev)
858 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
859 struct wm8971_setup_data *setup;
860 struct snd_soc_codec *codec;
861 struct wm8971_priv *wm8971;
864 pr_info("WM8971 Audio Codec %s", WM8971_VERSION);
866 setup = socdev->codec_data;
867 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
871 wm8971 = kzalloc(sizeof(struct wm8971_priv), GFP_KERNEL);
872 if (wm8971 == NULL) {
877 codec->private_data = wm8971;
878 socdev->codec = codec;
879 mutex_init(&codec->mutex);
880 INIT_LIST_HEAD(&codec->dapm_widgets);
881 INIT_LIST_HEAD(&codec->dapm_paths);
882 wm8971_socdev = socdev;
884 INIT_DELAYED_WORK(&codec->delayed_work, wm8971_work);
885 wm8971_workq = create_workqueue("wm8971");
886 if (wm8971_workq == NULL) {
887 kfree(codec->private_data);
892 #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
893 if (setup->i2c_address) {
894 codec->hw_write = (hw_write_t)i2c_master_send;
895 ret = wm8971_add_i2c_device(pdev, setup);
898 /* Add other interfaces here */
901 destroy_workqueue(wm8971_workq);
902 kfree(codec->private_data);
909 /* power down chip */
910 static int wm8971_remove(struct platform_device *pdev)
912 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
913 struct snd_soc_codec *codec = socdev->codec;
915 if (codec->control_data)
916 wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
918 destroy_workqueue(wm8971_workq);
919 snd_soc_free_pcms(socdev);
920 snd_soc_dapm_free(socdev);
921 #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
922 i2c_unregister_device(codec->control_data);
923 i2c_del_driver(&wm8971_i2c_driver);
925 kfree(codec->private_data);
931 struct snd_soc_codec_device soc_codec_dev_wm8971 = {
932 .probe = wm8971_probe,
933 .remove = wm8971_remove,
934 .suspend = wm8971_suspend,
935 .resume = wm8971_resume,
938 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8971);
940 MODULE_DESCRIPTION("ASoC WM8971 driver");
941 MODULE_AUTHOR("Lab126");
942 MODULE_LICENSE("GPL");