2 * wm8731.c -- WM8731 ALSA SoC Audio driver
4 * Copyright 2005 Openedhand Ltd.
6 * Author: Richard Purdie <richard@openedhand.com>
8 * Based on wm8753.c by Liam Girdwood
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/module.h>
16 #include <linux/moduleparam.h>
17 #include <linux/init.h>
18 #include <linux/delay.h>
20 #include <linux/i2c.h>
21 #include <linux/platform_device.h>
22 #include <sound/driver.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 "wm8731"
33 #define WM8731_VERSION "0.12"
39 #define WM8731_DEBUG 0
42 #define dbg(format, arg...) \
43 printk(KERN_DEBUG AUDIO_NAME ": " format "\n" , ## arg)
45 #define dbg(format, arg...) do {} while (0)
47 #define err(format, arg...) \
48 printk(KERN_ERR AUDIO_NAME ": " format "\n" , ## arg)
49 #define info(format, arg...) \
50 printk(KERN_INFO AUDIO_NAME ": " format "\n" , ## arg)
51 #define warn(format, arg...) \
52 printk(KERN_WARNING AUDIO_NAME ": " format "\n" , ## arg)
54 struct snd_soc_codec_device soc_codec_dev_wm8731;
57 * wm8731 register cache
58 * We can't read the WM8731 register space when we are
59 * using 2 wire for device control, so we cache them instead.
60 * There is no point in caching the reset register
62 static const u16 wm8731_reg[WM8731_CACHEREGNUM] = {
63 0x0097, 0x0097, 0x0079, 0x0079,
64 0x000a, 0x0008, 0x009f, 0x000a,
68 #define WM8731_DAIFMT \
69 (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_RIGHT_J | \
70 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_NB_IF | SND_SOC_DAIFMT_IB_NF | \
74 (SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE)
76 #define WM8731_RATES \
77 (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
78 SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
79 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
81 #define WM8731_HIFI_BITS \
82 (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
83 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
85 static struct snd_soc_dai_mode wm8731_modes[] = {
86 /* codec frame and clock master modes */
89 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
90 .pcmfmt = WM8731_HIFI_BITS,
91 .pcmrate = SNDRV_PCM_RATE_8000,
94 .bfs = SND_SOC_FSB(64),
97 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
98 .pcmfmt = WM8731_HIFI_BITS,
99 .pcmrate = SNDRV_PCM_RATE_8000,
100 .pcmdir = WM8731_DIR,
102 .bfs = SND_SOC_FSB(64),
105 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
106 .pcmfmt = WM8731_HIFI_BITS,
107 .pcmrate = SNDRV_PCM_RATE_8000,
108 .pcmdir = WM8731_DIR,
110 .bfs = SND_SOC_FSB(64),
113 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
114 .pcmfmt = WM8731_HIFI_BITS,
115 .pcmrate = SNDRV_PCM_RATE_8000,
116 .pcmdir = WM8731_DIR,
118 .bfs = SND_SOC_FSB(64),
123 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
124 .pcmfmt = WM8731_HIFI_BITS,
125 .pcmrate = SNDRV_PCM_RATE_32000,
126 .pcmdir = WM8731_DIR,
128 .bfs = SND_SOC_FSB(64),
131 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
132 .pcmfmt = WM8731_HIFI_BITS,
133 .pcmrate = SNDRV_PCM_RATE_32000,
134 .pcmdir = WM8731_DIR,
136 .bfs = SND_SOC_FSB(64),
141 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
142 .pcmfmt = WM8731_HIFI_BITS,
143 .pcmrate = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
144 .pcmdir = WM8731_DIR,
146 .bfs = SND_SOC_FSB(64),
149 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
150 .pcmfmt = WM8731_HIFI_BITS,
151 .pcmrate = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
152 .pcmdir = WM8731_DIR,
154 .bfs = SND_SOC_FSB(64),
159 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
160 .pcmfmt = WM8731_HIFI_BITS,
161 .pcmrate = SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000,
162 .pcmdir = WM8731_DIR,
164 .bfs = SND_SOC_FSB(64),
168 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
169 .pcmfmt = WM8731_HIFI_BITS,
170 .pcmrate = SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000,
171 .pcmdir = WM8731_DIR,
173 .bfs = SND_SOC_FSB(64),
176 /* USB codec frame and clock master modes */
179 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
180 .pcmfmt = WM8731_HIFI_BITS,
181 .pcmrate = SNDRV_PCM_RATE_8000,
182 .pcmdir = WM8731_DIR,
183 .flags = SND_SOC_DAI_BFS_DIV,
185 .bfs = SND_SOC_FSBD(1),
190 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
191 .pcmfmt = WM8731_HIFI_BITS,
192 .pcmrate = SNDRV_PCM_RATE_44100,
193 .pcmdir = WM8731_DIR,
194 .flags = SND_SOC_DAI_BFS_DIV,
196 .bfs = SND_SOC_FSBD(1),
201 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
202 .pcmfmt = WM8731_HIFI_BITS,
203 .pcmrate = SNDRV_PCM_RATE_48000,
204 .pcmdir = WM8731_DIR,
205 .flags = SND_SOC_DAI_BFS_DIV,
207 .bfs = SND_SOC_FSBD(1),
212 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
213 .pcmfmt = WM8731_HIFI_BITS,
214 .pcmrate = SNDRV_PCM_RATE_88200,
215 .pcmdir = WM8731_DIR,
216 .flags = SND_SOC_DAI_BFS_DIV,
218 .bfs = SND_SOC_FSBD(1),
223 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
224 .pcmfmt = WM8731_HIFI_BITS,
225 .pcmrate = SNDRV_PCM_RATE_96000,
226 .pcmdir = WM8731_DIR,
227 .flags = SND_SOC_DAI_BFS_DIV,
229 .bfs = SND_SOC_FSBD(1),
232 /* codec frame and clock slave modes */
234 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBS_CFS,
235 .pcmfmt = WM8731_HIFI_BITS,
236 .pcmrate = WM8731_RATES,
237 .pcmdir = WM8731_DIR,
238 .flags = SND_SOC_DAI_BFS_DIV,
239 .fs = SND_SOC_FS_ALL,
240 .bfs = SND_SOC_FSBD_ALL,
245 * read wm8731 register cache
247 static inline unsigned int wm8731_read_reg_cache(struct snd_soc_codec *codec,
250 u16 *cache = codec->reg_cache;
251 if (reg == WM8731_RESET)
253 if (reg >= WM8731_CACHEREGNUM)
259 * write wm8731 register cache
261 static inline void wm8731_write_reg_cache(struct snd_soc_codec *codec,
262 u16 reg, unsigned int value)
264 u16 *cache = codec->reg_cache;
265 if (reg >= WM8731_CACHEREGNUM)
271 * write to the WM8731 register space
273 static int wm8731_write(struct snd_soc_codec *codec, unsigned int reg,
279 * D15..D9 WM8731 register offset
280 * D8...D0 register data
282 data[0] = (reg << 1) | ((value >> 8) & 0x0001);
283 data[1] = value & 0x00ff;
285 wm8731_write_reg_cache (codec, reg, value);
286 if (codec->hw_write(codec->control_data, data, 2) == 2)
292 #define wm8731_reset(c) wm8731_write(c, WM8731_RESET, 0)
294 static const char *wm8731_input_select[] = {"Line In", "Mic"};
295 static const char *wm8731_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
297 static const struct soc_enum wm8731_enum[] = {
298 SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select),
299 SOC_ENUM_SINGLE(WM8731_APDIGI, 1, 4, wm8731_deemph),
302 static const struct snd_kcontrol_new wm8731_snd_controls[] = {
304 SOC_DOUBLE_R("Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V, 0, 127, 0),
305 SOC_DOUBLE_R("Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V, 7, 1, 0),
307 SOC_DOUBLE_R("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0),
308 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
310 SOC_SINGLE("Mic Boost (+20dB)", WM8731_APANA, 0, 1, 0),
311 SOC_SINGLE("Capture Mic Switch", WM8731_APANA, 1, 1, 1),
313 SOC_SINGLE("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1),
315 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
316 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
318 SOC_ENUM("Playback De-emphasis", wm8731_enum[1]),
321 /* add non dapm controls */
322 static int wm8731_add_controls(struct snd_soc_codec *codec)
326 for (i = 0; i < ARRAY_SIZE(wm8731_snd_controls); i++) {
327 if ((err = snd_ctl_add(codec->card,
328 snd_soc_cnew(&wm8731_snd_controls[i],codec, NULL))) < 0)
336 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
337 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
338 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
339 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
343 static const struct snd_kcontrol_new wm8731_input_mux_controls =
344 SOC_DAPM_ENUM("Input Select", wm8731_enum[0]);
346 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
347 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
348 &wm8731_output_mixer_controls[0],
349 ARRAY_SIZE(wm8731_output_mixer_controls)),
350 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
351 SND_SOC_DAPM_OUTPUT("LOUT"),
352 SND_SOC_DAPM_OUTPUT("LHPOUT"),
353 SND_SOC_DAPM_OUTPUT("ROUT"),
354 SND_SOC_DAPM_OUTPUT("RHPOUT"),
355 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
356 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
357 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
358 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
359 SND_SOC_DAPM_INPUT("MICIN"),
360 SND_SOC_DAPM_INPUT("RLINEIN"),
361 SND_SOC_DAPM_INPUT("LLINEIN"),
364 static const char *intercon[][3] = {
366 {"Output Mixer", "Line Bypass Switch", "Line Input"},
367 {"Output Mixer", "HiFi Playback Switch", "DAC"},
368 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
371 {"RHPOUT", NULL, "Output Mixer"},
372 {"ROUT", NULL, "Output Mixer"},
373 {"LHPOUT", NULL, "Output Mixer"},
374 {"LOUT", NULL, "Output Mixer"},
377 {"Input Mux", "Line In", "Line Input"},
378 {"Input Mux", "Mic", "Mic Bias"},
379 {"ADC", NULL, "Input Mux"},
382 {"Line Input", NULL, "LLINEIN"},
383 {"Line Input", NULL, "RLINEIN"},
384 {"Mic Bias", NULL, "MICIN"},
390 static int wm8731_add_widgets(struct snd_soc_codec *codec)
394 for(i = 0; i < ARRAY_SIZE(wm8731_dapm_widgets); i++) {
395 snd_soc_dapm_new_control(codec, &wm8731_dapm_widgets[i]);
398 /* set up audio path interconnects */
399 for(i = 0; intercon[i][0] != NULL; i++) {
400 snd_soc_dapm_connect_input(codec, intercon[i][0],
401 intercon[i][1], intercon[i][2]);
404 snd_soc_dapm_new_widgets(codec);
417 /* codec mclk clock divider coefficients */
418 static const struct _coeff_div coeff_div[] = {
420 {12288000, 48000, 256, 0x0, 0x0, 0x0},
421 {18432000, 48000, 384, 0x0, 0x1, 0x0},
422 {12000000, 48000, 250, 0x0, 0x0, 0x1},
425 {12288000, 32000, 384, 0x6, 0x0, 0x0},
426 {18432000, 32000, 576, 0x6, 0x1, 0x0},
429 {12288000, 8000, 1536, 0x3, 0x0, 0x0},
430 {18432000, 8000, 2304, 0x3, 0x1, 0x0},
431 {11289600, 8000, 1408, 0xb, 0x0, 0x0},
432 {16934400, 8000, 2112, 0xb, 0x1, 0x0},
433 {12000000, 8000, 1500, 0x3, 0x0, 0x1},
436 {12288000, 96000, 128, 0x7, 0x0, 0x0},
437 {18432000, 96000, 192, 0x7, 0x1, 0x0},
438 {12000000, 96000, 125, 0x7, 0x0, 0x1},
441 {11289600, 44100, 256, 0x8, 0x0, 0x0},
442 {16934400, 44100, 384, 0x8, 0x1, 0x0},
443 {12000000, 44100, 272, 0x8, 0x1, 0x1},
446 {11289600, 88200, 128, 0xf, 0x0, 0x0},
447 {16934400, 88200, 192, 0xf, 0x1, 0x0},
448 {12000000, 88200, 136, 0xf, 0x1, 0x1},
451 static inline int get_coeff(int mclk, int rate)
455 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
456 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
462 /* WM8731 supports numerous clocks per sample rate */
463 static unsigned int wm8731_config_sysclk(struct snd_soc_codec_dai *dai,
464 struct snd_soc_clock_info *info, unsigned int clk)
468 /* check that the calculated FS and rate actually match a clock from
469 * the machine driver */
470 if (info->fs * info->rate == clk)
476 static int wm8731_pcm_prepare(struct snd_pcm_substream *substream)
478 struct snd_soc_pcm_runtime *rtd = substream->private_data;
479 struct snd_soc_device *socdev = rtd->socdev;
480 struct snd_soc_codec *codec = socdev->codec;
481 u16 iface = 0, srate;
482 int i = get_coeff(rtd->codec_dai->mclk,
483 snd_soc_get_rate(rtd->codec_dai->dai_runtime.pcmrate));
485 /* set master/slave audio interface */
486 switch (rtd->codec_dai->dai_runtime.fmt & SND_SOC_DAIFMT_CLOCK_MASK) {
487 case SND_SOC_DAIFMT_CBM_CFM:
490 case SND_SOC_DAIFMT_CBS_CFS:
493 srate = (coeff_div[i].sr << 2) |
494 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
495 wm8731_write(codec, WM8731_SRATE, srate);
497 /* interface format */
498 switch (rtd->codec_dai->dai_runtime.fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
499 case SND_SOC_DAIFMT_I2S:
502 case SND_SOC_DAIFMT_RIGHT_J:
504 case SND_SOC_DAIFMT_LEFT_J:
507 case SND_SOC_DAIFMT_DSP_A:
510 case SND_SOC_DAIFMT_DSP_B:
516 switch (rtd->codec_dai->dai_runtime.pcmfmt) {
517 case SNDRV_PCM_FMTBIT_S16_LE:
519 case SNDRV_PCM_FMTBIT_S20_3LE:
522 case SNDRV_PCM_FMTBIT_S24_LE:
525 case SNDRV_PCM_FMTBIT_S32_LE:
530 /* clock inversion */
531 switch (rtd->codec_dai->dai_runtime.fmt & SND_SOC_DAIFMT_INV_MASK) {
532 case SND_SOC_DAIFMT_NB_NF:
534 case SND_SOC_DAIFMT_IB_IF:
537 case SND_SOC_DAIFMT_IB_NF:
540 case SND_SOC_DAIFMT_NB_IF:
546 wm8731_write(codec, WM8731_IFACE, iface);
549 wm8731_write(codec, WM8731_ACTIVE, 0x0001);
553 static void wm8731_shutdown(struct snd_pcm_substream *substream)
555 struct snd_soc_pcm_runtime *rtd = substream->private_data;
556 struct snd_soc_device *socdev = rtd->socdev;
557 struct snd_soc_codec *codec = socdev->codec;
560 if (!codec->active) {
562 wm8731_write(codec, WM8731_ACTIVE, 0x0);
566 static int wm8731_mute(struct snd_soc_codec *codec,
567 struct snd_soc_codec_dai *dai, int mute)
569 u16 mute_reg = wm8731_read_reg_cache(codec, WM8731_APDIGI) & 0xfff7;
571 wm8731_write(codec, WM8731_APDIGI, mute_reg | 0x8);
573 wm8731_write(codec, WM8731_APDIGI, mute_reg);
577 static int wm8731_dapm_event(struct snd_soc_codec *codec, int event)
579 u16 reg = wm8731_read_reg_cache(codec, WM8731_PWR) & 0xff7f;
582 case SNDRV_CTL_POWER_D0: /* full On */
583 /* vref/mid, osc on, dac unmute */
584 wm8731_write(codec, WM8731_PWR, reg);
586 case SNDRV_CTL_POWER_D1: /* partial On */
587 case SNDRV_CTL_POWER_D2: /* partial On */
589 case SNDRV_CTL_POWER_D3hot: /* Off, with power */
590 /* everything off except vref/vmid, */
591 wm8731_write(codec, WM8731_PWR, reg | 0x0040);
593 case SNDRV_CTL_POWER_D3cold: /* Off, without power */
594 /* everything off, dac mute, inactive */
595 wm8731_write(codec, WM8731_ACTIVE, 0x0);
596 wm8731_write(codec, WM8731_PWR, 0xffff);
599 codec->dapm_state = event;
603 struct snd_soc_codec_dai wm8731_dai = {
606 .stream_name = "Playback",
611 .stream_name = "Capture",
615 .config_sysclk = wm8731_config_sysclk,
616 .digital_mute = wm8731_mute,
618 .prepare = wm8731_pcm_prepare,
619 .shutdown = wm8731_shutdown,
622 .num_modes = ARRAY_SIZE(wm8731_modes),
623 .mode = wm8731_modes,
626 EXPORT_SYMBOL_GPL(wm8731_dai);
628 static int wm8731_suspend(struct platform_device *pdev, pm_message_t state)
630 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
631 struct snd_soc_codec *codec = socdev->codec;
633 wm8731_write(codec, WM8731_ACTIVE, 0x0);
634 wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3cold);
638 static int wm8731_resume(struct platform_device *pdev)
640 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
641 struct snd_soc_codec *codec = socdev->codec;
644 u16 *cache = codec->reg_cache;
646 /* Sync reg_cache with the hardware */
647 for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) {
648 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
649 data[1] = cache[i] & 0x00ff;
650 codec->hw_write(codec->control_data, data, 2);
652 wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3hot);
653 wm8731_dapm_event(codec, codec->suspend_dapm_state);
658 * initialise the WM8731 driver
659 * register the mixer and dsp interfaces with the kernel
661 static int wm8731_init(struct snd_soc_device *socdev)
663 struct snd_soc_codec *codec = socdev->codec;
666 codec->name = "WM8731";
667 codec->owner = THIS_MODULE;
668 codec->read = wm8731_read_reg_cache;
669 codec->write = wm8731_write;
670 codec->dapm_event = wm8731_dapm_event;
671 codec->dai = &wm8731_dai;
673 codec->reg_cache_size = ARRAY_SIZE(wm8731_reg);
676 kzalloc(sizeof(u16) * ARRAY_SIZE(wm8731_reg), GFP_KERNEL);
677 if (codec->reg_cache == NULL)
679 memcpy(codec->reg_cache,
680 wm8731_reg, sizeof(u16) * ARRAY_SIZE(wm8731_reg));
681 codec->reg_cache_size = sizeof(u16) * ARRAY_SIZE(wm8731_reg);
686 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
688 kfree(codec->reg_cache);
692 /* power on device */
693 wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3hot);
695 /* set the update bits */
696 reg = wm8731_read_reg_cache(codec, WM8731_LOUT1V);
697 wm8731_write(codec, WM8731_LOUT1V, reg | 0x0100);
698 reg = wm8731_read_reg_cache(codec, WM8731_ROUT1V);
699 wm8731_write(codec, WM8731_ROUT1V, reg | 0x0100);
700 reg = wm8731_read_reg_cache(codec, WM8731_LINVOL);
701 wm8731_write(codec, WM8731_LINVOL, reg | 0x0100);
702 reg = wm8731_read_reg_cache(codec, WM8731_RINVOL);
703 wm8731_write(codec, WM8731_RINVOL, reg | 0x0100);
705 wm8731_add_controls(codec);
706 wm8731_add_widgets(codec);
707 ret = snd_soc_register_card(socdev);
709 snd_soc_free_pcms(socdev);
710 snd_soc_dapm_free(socdev);
716 static struct snd_soc_device *wm8731_socdev;
718 #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
721 * WM8731 2 wire address is determined by GPIO5
722 * state during powerup.
726 static unsigned short normal_i2c[] = { 0, I2C_CLIENT_END };
728 /* Magic definition of all other variables and things */
731 static struct i2c_driver wm8731_i2c_driver;
732 static struct i2c_client client_template;
734 /* If the i2c layer weren't so broken, we could pass this kind of data
737 static int wm8731_codec_probe(struct i2c_adapter *adap, int addr, int kind)
739 struct snd_soc_device *socdev = wm8731_socdev;
740 struct wm8731_setup_data *setup = socdev->codec_data;
741 struct snd_soc_codec *codec = socdev->codec;
742 struct i2c_client *i2c;
745 if (addr != setup->i2c_address)
748 client_template.adapter = adap;
749 client_template.addr = addr;
751 i2c = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
756 memcpy(i2c, &client_template, sizeof(struct i2c_client));
757 i2c_set_clientdata(i2c, codec);
758 codec->control_data = i2c;
760 ret = i2c_attach_client(i2c);
762 err("failed to attach codec at addr %x\n", addr);
766 ret = wm8731_init(socdev);
768 err("failed to initialise WM8731\n");
779 static int wm8731_i2c_detach(struct i2c_client *client)
781 struct snd_soc_codec* codec = i2c_get_clientdata(client);
782 i2c_detach_client(client);
783 kfree(codec->reg_cache);
788 static int wm8731_i2c_attach(struct i2c_adapter *adap)
790 return i2c_probe(adap, &addr_data, wm8731_codec_probe);
793 /* corgi i2c codec control layer */
794 static struct i2c_driver wm8731_i2c_driver = {
796 .name = "WM8731 I2C Codec",
797 .owner = THIS_MODULE,
799 .id = I2C_DRIVERID_WM8731,
800 .attach_adapter = wm8731_i2c_attach,
801 .detach_client = wm8731_i2c_detach,
805 static struct i2c_client client_template = {
807 .driver = &wm8731_i2c_driver,
811 static int wm8731_probe(struct platform_device *pdev)
813 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
814 struct wm8731_setup_data *setup;
815 struct snd_soc_codec *codec;
818 info("WM8731 Audio Codec %s", WM8731_VERSION);
820 setup = socdev->codec_data;
821 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
825 socdev->codec = codec;
826 mutex_init(&codec->mutex);
827 INIT_LIST_HEAD(&codec->dapm_widgets);
828 INIT_LIST_HEAD(&codec->dapm_paths);
830 wm8731_socdev = socdev;
831 #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
832 if (setup->i2c_address) {
833 normal_i2c[0] = setup->i2c_address;
834 codec->hw_write = (hw_write_t)i2c_master_send;
835 ret = i2c_add_driver(&wm8731_i2c_driver);
837 printk(KERN_ERR "can't add i2c driver");
840 /* Add other interfaces here */
845 /* power down chip */
846 static int wm8731_remove(struct platform_device *pdev)
848 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
849 struct snd_soc_codec *codec = socdev->codec;
851 if (codec->control_data)
852 wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3cold);
854 snd_soc_free_pcms(socdev);
855 snd_soc_dapm_free(socdev);
856 #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
857 i2c_del_driver(&wm8731_i2c_driver);
864 struct snd_soc_codec_device soc_codec_dev_wm8731 = {
865 .probe = wm8731_probe,
866 .remove = wm8731_remove,
867 .suspend = wm8731_suspend,
868 .resume = wm8731_resume,
871 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8731);
873 MODULE_DESCRIPTION("ASoC WM8731 driver");
874 MODULE_AUTHOR("Richard Purdie");
875 MODULE_LICENSE("GPL");