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,
93 .flags = SND_SOC_DAI_BFS_RATE,
98 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
99 .pcmfmt = WM8731_HIFI_BITS,
100 .pcmrate = SNDRV_PCM_RATE_8000,
101 .pcmdir = WM8731_DIR,
102 .flags = SND_SOC_DAI_BFS_RATE,
107 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
108 .pcmfmt = WM8731_HIFI_BITS,
109 .pcmrate = SNDRV_PCM_RATE_8000,
110 .pcmdir = WM8731_DIR,
111 .flags = SND_SOC_DAI_BFS_RATE,
116 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
117 .pcmfmt = WM8731_HIFI_BITS,
118 .pcmrate = SNDRV_PCM_RATE_8000,
119 .pcmdir = WM8731_DIR,
120 .flags = SND_SOC_DAI_BFS_RATE,
127 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
128 .pcmfmt = WM8731_HIFI_BITS,
129 .pcmrate = SNDRV_PCM_RATE_32000,
130 .pcmdir = WM8731_DIR,
131 .flags = SND_SOC_DAI_BFS_RATE,
136 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
137 .pcmfmt = WM8731_HIFI_BITS,
138 .pcmrate = SNDRV_PCM_RATE_32000,
139 .pcmdir = WM8731_DIR,
140 .flags = SND_SOC_DAI_BFS_RATE,
147 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
148 .pcmfmt = WM8731_HIFI_BITS,
149 .pcmrate = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
150 .pcmdir = WM8731_DIR,
151 .flags = SND_SOC_DAI_BFS_RATE,
156 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
157 .pcmfmt = WM8731_HIFI_BITS,
158 .pcmrate = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
159 .pcmdir = WM8731_DIR,
160 .flags = SND_SOC_DAI_BFS_RATE,
167 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
168 .pcmfmt = WM8731_HIFI_BITS,
169 .pcmrate = SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000,
170 .pcmdir = WM8731_DIR,
171 .flags = SND_SOC_DAI_BFS_RATE,
176 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
177 .pcmfmt = WM8731_HIFI_BITS,
178 .pcmrate = SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000,
179 .pcmdir = WM8731_DIR,
180 .flags = SND_SOC_DAI_BFS_RATE,
185 /* USB codec frame and clock master modes */
188 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
189 .pcmfmt = WM8731_HIFI_BITS,
190 .pcmrate = SNDRV_PCM_RATE_8000,
191 .pcmdir = WM8731_DIR,
192 .flags = SND_SOC_DAI_BFS_DIV,
194 .bfs = SND_SOC_FSBD(1),
199 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
200 .pcmfmt = WM8731_HIFI_BITS,
201 .pcmrate = SNDRV_PCM_RATE_44100,
202 .pcmdir = WM8731_DIR,
203 .flags = SND_SOC_DAI_BFS_DIV,
205 .bfs = SND_SOC_FSBD(1),
210 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
211 .pcmfmt = WM8731_HIFI_BITS,
212 .pcmrate = SNDRV_PCM_RATE_48000,
213 .pcmdir = WM8731_DIR,
214 .flags = SND_SOC_DAI_BFS_DIV,
216 .bfs = SND_SOC_FSBD(1),
221 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
222 .pcmfmt = WM8731_HIFI_BITS,
223 .pcmrate = SNDRV_PCM_RATE_88200,
224 .pcmdir = WM8731_DIR,
225 .flags = SND_SOC_DAI_BFS_DIV,
227 .bfs = SND_SOC_FSBD(1),
232 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBM_CFM,
233 .pcmfmt = WM8731_HIFI_BITS,
234 .pcmrate = SNDRV_PCM_RATE_96000,
235 .pcmdir = WM8731_DIR,
236 .flags = SND_SOC_DAI_BFS_DIV,
238 .bfs = SND_SOC_FSBD(1),
241 /* codec frame and clock slave modes */
243 .fmt = WM8731_DAIFMT | SND_SOC_DAIFMT_CBS_CFS,
244 .pcmfmt = WM8731_HIFI_BITS,
245 .pcmrate = WM8731_RATES,
246 .pcmdir = WM8731_DIR,
247 .flags = SND_SOC_DAI_BFS_DIV,
248 .fs = SND_SOC_FS_ALL,
249 .bfs = SND_SOC_FSB_ALL,
254 * read wm8731 register cache
256 static inline unsigned int wm8731_read_reg_cache(struct snd_soc_codec *codec,
259 u16 *cache = codec->reg_cache;
260 if (reg == WM8731_RESET)
262 if (reg >= WM8731_CACHEREGNUM)
268 * write wm8731 register cache
270 static inline void wm8731_write_reg_cache(struct snd_soc_codec *codec,
271 u16 reg, unsigned int value)
273 u16 *cache = codec->reg_cache;
274 if (reg >= WM8731_CACHEREGNUM)
280 * write to the WM8731 register space
282 static int wm8731_write(struct snd_soc_codec *codec, unsigned int reg,
288 * D15..D9 WM8731 register offset
289 * D8...D0 register data
291 data[0] = (reg << 1) | ((value >> 8) & 0x0001);
292 data[1] = value & 0x00ff;
294 wm8731_write_reg_cache (codec, reg, value);
295 if (codec->hw_write(codec->control_data, data, 2) == 2)
301 #define wm8731_reset(c) wm8731_write(c, WM8731_RESET, 0)
303 static const char *wm8731_input_select[] = {"Line In", "Mic"};
304 static const char *wm8731_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
306 static const struct soc_enum wm8731_enum[] = {
307 SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select),
308 SOC_ENUM_SINGLE(WM8731_APDIGI, 1, 4, wm8731_deemph),
311 static const struct snd_kcontrol_new wm8731_snd_controls[] = {
313 SOC_DOUBLE_R("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
315 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
318 SOC_DOUBLE_R("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0),
319 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
321 SOC_SINGLE("Mic Boost (+20dB)", WM8731_APANA, 0, 1, 0),
322 SOC_SINGLE("Capture Mic Switch", WM8731_APANA, 1, 1, 1),
324 SOC_SINGLE("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1),
326 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
327 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
329 SOC_ENUM("Playback De-emphasis", wm8731_enum[1]),
332 /* add non dapm controls */
333 static int wm8731_add_controls(struct snd_soc_codec *codec)
337 for (i = 0; i < ARRAY_SIZE(wm8731_snd_controls); i++) {
338 if ((err = snd_ctl_add(codec->card,
339 snd_soc_cnew(&wm8731_snd_controls[i],codec, NULL))) < 0)
347 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
348 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
349 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
350 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
354 static const struct snd_kcontrol_new wm8731_input_mux_controls =
355 SOC_DAPM_ENUM("Input Select", wm8731_enum[0]);
357 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
358 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
359 &wm8731_output_mixer_controls[0],
360 ARRAY_SIZE(wm8731_output_mixer_controls)),
361 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
362 SND_SOC_DAPM_OUTPUT("LOUT"),
363 SND_SOC_DAPM_OUTPUT("LHPOUT"),
364 SND_SOC_DAPM_OUTPUT("ROUT"),
365 SND_SOC_DAPM_OUTPUT("RHPOUT"),
366 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
367 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
368 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
369 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
370 SND_SOC_DAPM_INPUT("MICIN"),
371 SND_SOC_DAPM_INPUT("RLINEIN"),
372 SND_SOC_DAPM_INPUT("LLINEIN"),
375 static const char *intercon[][3] = {
377 {"Output Mixer", "Line Bypass Switch", "Line Input"},
378 {"Output Mixer", "HiFi Playback Switch", "DAC"},
379 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
382 {"RHPOUT", NULL, "Output Mixer"},
383 {"ROUT", NULL, "Output Mixer"},
384 {"LHPOUT", NULL, "Output Mixer"},
385 {"LOUT", NULL, "Output Mixer"},
388 {"Input Mux", "Line In", "Line Input"},
389 {"Input Mux", "Mic", "Mic Bias"},
390 {"ADC", NULL, "Input Mux"},
393 {"Line Input", NULL, "LLINEIN"},
394 {"Line Input", NULL, "RLINEIN"},
395 {"Mic Bias", NULL, "MICIN"},
401 static int wm8731_add_widgets(struct snd_soc_codec *codec)
405 for(i = 0; i < ARRAY_SIZE(wm8731_dapm_widgets); i++) {
406 snd_soc_dapm_new_control(codec, &wm8731_dapm_widgets[i]);
409 /* set up audio path interconnects */
410 for(i = 0; intercon[i][0] != NULL; i++) {
411 snd_soc_dapm_connect_input(codec, intercon[i][0],
412 intercon[i][1], intercon[i][2]);
415 snd_soc_dapm_new_widgets(codec);
428 /* codec mclk clock divider coefficients */
429 static const struct _coeff_div coeff_div[] = {
431 {12288000, 48000, 256, 0x0, 0x0, 0x0},
432 {18432000, 48000, 384, 0x0, 0x1, 0x0},
433 {12000000, 48000, 250, 0x0, 0x0, 0x1},
436 {12288000, 32000, 384, 0x6, 0x0, 0x0},
437 {18432000, 32000, 576, 0x6, 0x1, 0x0},
440 {12288000, 8000, 1536, 0x3, 0x0, 0x0},
441 {18432000, 8000, 2304, 0x3, 0x1, 0x0},
442 {11289600, 8000, 1408, 0xb, 0x0, 0x0},
443 {16934400, 8000, 2112, 0xb, 0x1, 0x0},
444 {12000000, 8000, 1500, 0x3, 0x0, 0x1},
447 {12288000, 96000, 128, 0x7, 0x0, 0x0},
448 {18432000, 96000, 192, 0x7, 0x1, 0x0},
449 {12000000, 96000, 125, 0x7, 0x0, 0x1},
452 {11289600, 44100, 256, 0x8, 0x0, 0x0},
453 {16934400, 44100, 384, 0x8, 0x1, 0x0},
454 {12000000, 44100, 272, 0x8, 0x1, 0x1},
457 {11289600, 88200, 128, 0xf, 0x0, 0x0},
458 {16934400, 88200, 192, 0xf, 0x1, 0x0},
459 {12000000, 88200, 136, 0xf, 0x1, 0x1},
462 static inline int get_coeff(int mclk, int rate)
466 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
467 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
473 /* WM8731 supports numerous clocks per sample rate */
474 static unsigned int wm8731_config_sysclk(struct snd_soc_codec_dai *dai,
475 struct snd_soc_clock_info *info, unsigned int clk)
479 /* check that the calculated FS and rate actually match a clock from
480 * the machine driver */
481 if (info->fs * info->rate == clk)
487 static int wm8731_pcm_prepare(struct snd_pcm_substream *substream)
489 struct snd_soc_pcm_runtime *rtd = substream->private_data;
490 struct snd_soc_device *socdev = rtd->socdev;
491 struct snd_soc_codec *codec = socdev->codec;
492 u16 iface = 0, srate;
493 int i = get_coeff(rtd->codec_dai->mclk,
494 snd_soc_get_rate(rtd->codec_dai->dai_runtime.pcmrate));
496 /* set master/slave audio interface */
497 switch (rtd->codec_dai->dai_runtime.fmt & SND_SOC_DAIFMT_CLOCK_MASK) {
498 case SND_SOC_DAIFMT_CBM_CFM:
501 case SND_SOC_DAIFMT_CBS_CFS:
504 srate = (coeff_div[i].sr << 2) |
505 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
506 wm8731_write(codec, WM8731_SRATE, srate);
508 /* interface format */
509 switch (rtd->codec_dai->dai_runtime.fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
510 case SND_SOC_DAIFMT_I2S:
513 case SND_SOC_DAIFMT_RIGHT_J:
515 case SND_SOC_DAIFMT_LEFT_J:
518 case SND_SOC_DAIFMT_DSP_A:
521 case SND_SOC_DAIFMT_DSP_B:
527 switch (rtd->codec_dai->dai_runtime.pcmfmt) {
528 case SNDRV_PCM_FMTBIT_S16_LE:
530 case SNDRV_PCM_FMTBIT_S20_3LE:
533 case SNDRV_PCM_FMTBIT_S24_LE:
536 case SNDRV_PCM_FMTBIT_S32_LE:
541 /* clock inversion */
542 switch (rtd->codec_dai->dai_runtime.fmt & SND_SOC_DAIFMT_INV_MASK) {
543 case SND_SOC_DAIFMT_NB_NF:
545 case SND_SOC_DAIFMT_IB_IF:
548 case SND_SOC_DAIFMT_IB_NF:
551 case SND_SOC_DAIFMT_NB_IF:
557 wm8731_write(codec, WM8731_IFACE, iface);
560 wm8731_write(codec, WM8731_ACTIVE, 0x0001);
564 static void wm8731_shutdown(struct snd_pcm_substream *substream)
566 struct snd_soc_pcm_runtime *rtd = substream->private_data;
567 struct snd_soc_device *socdev = rtd->socdev;
568 struct snd_soc_codec *codec = socdev->codec;
571 if (!codec->active) {
573 wm8731_write(codec, WM8731_ACTIVE, 0x0);
577 static int wm8731_mute(struct snd_soc_codec *codec,
578 struct snd_soc_codec_dai *dai, int mute)
580 u16 mute_reg = wm8731_read_reg_cache(codec, WM8731_APDIGI) & 0xfff7;
582 wm8731_write(codec, WM8731_APDIGI, mute_reg | 0x8);
584 wm8731_write(codec, WM8731_APDIGI, mute_reg);
588 static int wm8731_dapm_event(struct snd_soc_codec *codec, int event)
590 u16 reg = wm8731_read_reg_cache(codec, WM8731_PWR) & 0xff7f;
593 case SNDRV_CTL_POWER_D0: /* full On */
594 /* vref/mid, osc on, dac unmute */
595 wm8731_write(codec, WM8731_PWR, reg);
597 case SNDRV_CTL_POWER_D1: /* partial On */
598 case SNDRV_CTL_POWER_D2: /* partial On */
600 case SNDRV_CTL_POWER_D3hot: /* Off, with power */
601 /* everything off except vref/vmid, */
602 wm8731_write(codec, WM8731_PWR, reg | 0x0040);
604 case SNDRV_CTL_POWER_D3cold: /* Off, without power */
605 /* everything off, dac mute, inactive */
606 wm8731_write(codec, WM8731_ACTIVE, 0x0);
607 wm8731_write(codec, WM8731_PWR, 0xffff);
610 codec->dapm_state = event;
614 struct snd_soc_codec_dai wm8731_dai = {
617 .stream_name = "Playback",
622 .stream_name = "Capture",
626 .config_sysclk = wm8731_config_sysclk,
627 .digital_mute = wm8731_mute,
629 .prepare = wm8731_pcm_prepare,
630 .shutdown = wm8731_shutdown,
633 .num_modes = ARRAY_SIZE(wm8731_modes),
634 .mode = wm8731_modes,
637 EXPORT_SYMBOL_GPL(wm8731_dai);
639 static int wm8731_suspend(struct platform_device *pdev, pm_message_t state)
641 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
642 struct snd_soc_codec *codec = socdev->codec;
644 wm8731_write(codec, WM8731_ACTIVE, 0x0);
645 wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3cold);
649 static int wm8731_resume(struct platform_device *pdev)
651 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
652 struct snd_soc_codec *codec = socdev->codec;
655 u16 *cache = codec->reg_cache;
657 /* Sync reg_cache with the hardware */
658 for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) {
659 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
660 data[1] = cache[i] & 0x00ff;
661 codec->hw_write(codec->control_data, data, 2);
663 wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3hot);
664 wm8731_dapm_event(codec, codec->suspend_dapm_state);
669 * initialise the WM8731 driver
670 * register the mixer and dsp interfaces with the kernel
672 static int wm8731_init(struct snd_soc_device *socdev)
674 struct snd_soc_codec *codec = socdev->codec;
677 codec->name = "WM8731";
678 codec->owner = THIS_MODULE;
679 codec->read = wm8731_read_reg_cache;
680 codec->write = wm8731_write;
681 codec->dapm_event = wm8731_dapm_event;
682 codec->dai = &wm8731_dai;
684 codec->reg_cache_size = ARRAY_SIZE(wm8731_reg);
687 kzalloc(sizeof(u16) * ARRAY_SIZE(wm8731_reg), GFP_KERNEL);
688 if (codec->reg_cache == NULL)
690 memcpy(codec->reg_cache,
691 wm8731_reg, sizeof(u16) * ARRAY_SIZE(wm8731_reg));
692 codec->reg_cache_size = sizeof(u16) * ARRAY_SIZE(wm8731_reg);
697 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
699 kfree(codec->reg_cache);
703 /* power on device */
704 wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3hot);
706 /* set the update bits */
707 reg = wm8731_read_reg_cache(codec, WM8731_LOUT1V);
708 wm8731_write(codec, WM8731_LOUT1V, reg | 0x0100);
709 reg = wm8731_read_reg_cache(codec, WM8731_ROUT1V);
710 wm8731_write(codec, WM8731_ROUT1V, reg | 0x0100);
711 reg = wm8731_read_reg_cache(codec, WM8731_LINVOL);
712 wm8731_write(codec, WM8731_LINVOL, reg | 0x0100);
713 reg = wm8731_read_reg_cache(codec, WM8731_RINVOL);
714 wm8731_write(codec, WM8731_RINVOL, reg | 0x0100);
716 wm8731_add_controls(codec);
717 wm8731_add_widgets(codec);
718 ret = snd_soc_register_card(socdev);
720 snd_soc_free_pcms(socdev);
721 snd_soc_dapm_free(socdev);
727 static struct snd_soc_device *wm8731_socdev;
729 #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
732 * WM8731 2 wire address is determined by GPIO5
733 * state during powerup.
737 static unsigned short normal_i2c[] = { 0, I2C_CLIENT_END };
739 /* Magic definition of all other variables and things */
742 static struct i2c_driver wm8731_i2c_driver;
743 static struct i2c_client client_template;
745 /* If the i2c layer weren't so broken, we could pass this kind of data
748 static int wm8731_codec_probe(struct i2c_adapter *adap, int addr, int kind)
750 struct snd_soc_device *socdev = wm8731_socdev;
751 struct wm8731_setup_data *setup = socdev->codec_data;
752 struct snd_soc_codec *codec = socdev->codec;
753 struct i2c_client *i2c;
756 if (addr != setup->i2c_address)
759 client_template.adapter = adap;
760 client_template.addr = addr;
762 i2c = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
767 memcpy(i2c, &client_template, sizeof(struct i2c_client));
768 i2c_set_clientdata(i2c, codec);
769 codec->control_data = i2c;
771 ret = i2c_attach_client(i2c);
773 err("failed to attach codec at addr %x\n", addr);
777 ret = wm8731_init(socdev);
779 err("failed to initialise WM8731\n");
790 static int wm8731_i2c_detach(struct i2c_client *client)
792 struct snd_soc_codec* codec = i2c_get_clientdata(client);
793 i2c_detach_client(client);
794 kfree(codec->reg_cache);
799 static int wm8731_i2c_attach(struct i2c_adapter *adap)
801 return i2c_probe(adap, &addr_data, wm8731_codec_probe);
804 /* corgi i2c codec control layer */
805 static struct i2c_driver wm8731_i2c_driver = {
807 .name = "WM8731 I2C Codec",
808 .owner = THIS_MODULE,
810 .id = I2C_DRIVERID_WM8731,
811 .attach_adapter = wm8731_i2c_attach,
812 .detach_client = wm8731_i2c_detach,
816 static struct i2c_client client_template = {
818 .driver = &wm8731_i2c_driver,
822 static int wm8731_probe(struct platform_device *pdev)
824 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
825 struct wm8731_setup_data *setup;
826 struct snd_soc_codec *codec;
829 info("WM8731 Audio Codec %s", WM8731_VERSION);
831 setup = socdev->codec_data;
832 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
836 socdev->codec = codec;
837 mutex_init(&codec->mutex);
838 INIT_LIST_HEAD(&codec->dapm_widgets);
839 INIT_LIST_HEAD(&codec->dapm_paths);
841 wm8731_socdev = socdev;
842 #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
843 if (setup->i2c_address) {
844 normal_i2c[0] = setup->i2c_address;
845 codec->hw_write = (hw_write_t)i2c_master_send;
846 ret = i2c_add_driver(&wm8731_i2c_driver);
848 printk(KERN_ERR "can't add i2c driver");
851 /* Add other interfaces here */
856 /* power down chip */
857 static int wm8731_remove(struct platform_device *pdev)
859 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
860 struct snd_soc_codec *codec = socdev->codec;
862 if (codec->control_data)
863 wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3cold);
865 snd_soc_free_pcms(socdev);
866 snd_soc_dapm_free(socdev);
867 #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
868 i2c_del_driver(&wm8731_i2c_driver);
875 struct snd_soc_codec_device soc_codec_dev_wm8731 = {
876 .probe = wm8731_probe,
877 .remove = wm8731_remove,
878 .suspend = wm8731_suspend,
879 .resume = wm8731_resume,
882 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8731);
884 MODULE_DESCRIPTION("ASoC WM8731 driver");
885 MODULE_AUTHOR("Richard Purdie");
886 MODULE_LICENSE("GPL");