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Richard Purdie40e0aa62006-10-06 18:36:07 +02001/*
2 * wm8731.c -- WM8731 ALSA SoC Audio driver
3 *
4 * Copyright 2005 Openedhand Ltd.
5 *
6 * Author: Richard Purdie <richard@openedhand.com>
7 *
8 * Based on wm8753.c by Liam Girdwood
9 *
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.
13 */
14
15#include <linux/module.h>
16#include <linux/moduleparam.h>
17#include <linux/init.h>
18#include <linux/delay.h>
19#include <linux/pm.h>
20#include <linux/i2c.h>
21#include <linux/platform_device.h>
Richard Purdie40e0aa62006-10-06 18:36:07 +020022#include <sound/core.h>
23#include <sound/pcm.h>
24#include <sound/pcm_params.h>
25#include <sound/soc.h>
26#include <sound/soc-dapm.h>
27#include <sound/initval.h>
28
29#include "wm8731.h"
30
31#define AUDIO_NAME "wm8731"
Frank Mandarinob36d61d2007-02-02 17:14:56 +010032#define WM8731_VERSION "0.13"
Richard Purdie40e0aa62006-10-06 18:36:07 +020033
34/*
35 * Debug
36 */
37
38#define WM8731_DEBUG 0
39
40#ifdef WM8731_DEBUG
41#define dbg(format, arg...) \
42 printk(KERN_DEBUG AUDIO_NAME ": " format "\n" , ## arg)
43#else
44#define dbg(format, arg...) do {} while (0)
45#endif
46#define err(format, arg...) \
47 printk(KERN_ERR AUDIO_NAME ": " format "\n" , ## arg)
48#define info(format, arg...) \
49 printk(KERN_INFO AUDIO_NAME ": " format "\n" , ## arg)
50#define warn(format, arg...) \
51 printk(KERN_WARNING AUDIO_NAME ": " format "\n" , ## arg)
52
53struct snd_soc_codec_device soc_codec_dev_wm8731;
54
Frank Mandarinob36d61d2007-02-02 17:14:56 +010055/* codec private data */
56struct wm8731_priv {
57 unsigned int sysclk;
58};
59
Richard Purdie40e0aa62006-10-06 18:36:07 +020060/*
61 * wm8731 register cache
62 * We can't read the WM8731 register space when we are
63 * using 2 wire for device control, so we cache them instead.
64 * There is no point in caching the reset register
65 */
66static const u16 wm8731_reg[WM8731_CACHEREGNUM] = {
67 0x0097, 0x0097, 0x0079, 0x0079,
68 0x000a, 0x0008, 0x009f, 0x000a,
69 0x0000, 0x0000
70};
71
Richard Purdie40e0aa62006-10-06 18:36:07 +020072/*
73 * read wm8731 register cache
74 */
75static inline unsigned int wm8731_read_reg_cache(struct snd_soc_codec *codec,
76 unsigned int reg)
77{
78 u16 *cache = codec->reg_cache;
79 if (reg == WM8731_RESET)
80 return 0;
81 if (reg >= WM8731_CACHEREGNUM)
82 return -1;
83 return cache[reg];
84}
85
86/*
87 * write wm8731 register cache
88 */
89static inline void wm8731_write_reg_cache(struct snd_soc_codec *codec,
90 u16 reg, unsigned int value)
91{
92 u16 *cache = codec->reg_cache;
93 if (reg >= WM8731_CACHEREGNUM)
94 return;
95 cache[reg] = value;
96}
97
98/*
99 * write to the WM8731 register space
100 */
101static int wm8731_write(struct snd_soc_codec *codec, unsigned int reg,
102 unsigned int value)
103{
104 u8 data[2];
105
106 /* data is
107 * D15..D9 WM8731 register offset
108 * D8...D0 register data
109 */
110 data[0] = (reg << 1) | ((value >> 8) & 0x0001);
111 data[1] = value & 0x00ff;
112
Mark Brownd454aee2008-04-23 15:16:46 +0200113 wm8731_write_reg_cache(codec, reg, value);
Richard Purdie40e0aa62006-10-06 18:36:07 +0200114 if (codec->hw_write(codec->control_data, data, 2) == 2)
115 return 0;
116 else
117 return -EIO;
118}
119
120#define wm8731_reset(c) wm8731_write(c, WM8731_RESET, 0)
121
122static const char *wm8731_input_select[] = {"Line In", "Mic"};
123static const char *wm8731_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
124
125static const struct soc_enum wm8731_enum[] = {
126 SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select),
127 SOC_ENUM_SINGLE(WM8731_APDIGI, 1, 4, wm8731_deemph),
128};
129
130static const struct snd_kcontrol_new wm8731_snd_controls[] = {
131
Liam Girdwoodbd903b62006-11-09 16:35:01 +0100132SOC_DOUBLE_R("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
133 0, 127, 0),
134SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
135 7, 1, 0),
Richard Purdie40e0aa62006-10-06 18:36:07 +0200136
137SOC_DOUBLE_R("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0),
138SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
139
140SOC_SINGLE("Mic Boost (+20dB)", WM8731_APANA, 0, 1, 0),
141SOC_SINGLE("Capture Mic Switch", WM8731_APANA, 1, 1, 1),
142
143SOC_SINGLE("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1),
144
145SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
146SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
147
148SOC_ENUM("Playback De-emphasis", wm8731_enum[1]),
149};
150
151/* add non dapm controls */
152static int wm8731_add_controls(struct snd_soc_codec *codec)
153{
154 int err, i;
155
156 for (i = 0; i < ARRAY_SIZE(wm8731_snd_controls); i++) {
Mark Brownd454aee2008-04-23 15:16:46 +0200157 err = snd_ctl_add(codec->card,
158 snd_soc_cnew(&wm8731_snd_controls[i],
159 codec, NULL));
160 if (err < 0)
Richard Purdie40e0aa62006-10-06 18:36:07 +0200161 return err;
162 }
163
164 return 0;
165}
166
167/* Output Mixer */
168static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
169SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
170SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
171SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
172};
173
174/* Input mux */
175static const struct snd_kcontrol_new wm8731_input_mux_controls =
176SOC_DAPM_ENUM("Input Select", wm8731_enum[0]);
177
178static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
179SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
180 &wm8731_output_mixer_controls[0],
181 ARRAY_SIZE(wm8731_output_mixer_controls)),
182SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
183SND_SOC_DAPM_OUTPUT("LOUT"),
184SND_SOC_DAPM_OUTPUT("LHPOUT"),
185SND_SOC_DAPM_OUTPUT("ROUT"),
186SND_SOC_DAPM_OUTPUT("RHPOUT"),
187SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
188SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
189SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
190SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
191SND_SOC_DAPM_INPUT("MICIN"),
192SND_SOC_DAPM_INPUT("RLINEIN"),
193SND_SOC_DAPM_INPUT("LLINEIN"),
194};
195
Mark Browna65f0562008-05-13 14:54:43 +0200196static const struct snd_soc_dapm_route intercon[] = {
Richard Purdie40e0aa62006-10-06 18:36:07 +0200197 /* output mixer */
198 {"Output Mixer", "Line Bypass Switch", "Line Input"},
199 {"Output Mixer", "HiFi Playback Switch", "DAC"},
200 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
201
202 /* outputs */
203 {"RHPOUT", NULL, "Output Mixer"},
204 {"ROUT", NULL, "Output Mixer"},
205 {"LHPOUT", NULL, "Output Mixer"},
206 {"LOUT", NULL, "Output Mixer"},
207
208 /* input mux */
209 {"Input Mux", "Line In", "Line Input"},
210 {"Input Mux", "Mic", "Mic Bias"},
211 {"ADC", NULL, "Input Mux"},
212
213 /* inputs */
214 {"Line Input", NULL, "LLINEIN"},
215 {"Line Input", NULL, "RLINEIN"},
216 {"Mic Bias", NULL, "MICIN"},
Richard Purdie40e0aa62006-10-06 18:36:07 +0200217};
218
219static int wm8731_add_widgets(struct snd_soc_codec *codec)
220{
Mark Browna65f0562008-05-13 14:54:43 +0200221 snd_soc_dapm_new_controls(codec, wm8731_dapm_widgets,
222 ARRAY_SIZE(wm8731_dapm_widgets));
Richard Purdie40e0aa62006-10-06 18:36:07 +0200223
Mark Browna65f0562008-05-13 14:54:43 +0200224 snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
Richard Purdie40e0aa62006-10-06 18:36:07 +0200225
226 snd_soc_dapm_new_widgets(codec);
227 return 0;
228}
229
230struct _coeff_div {
231 u32 mclk;
232 u32 rate;
233 u16 fs;
234 u8 sr:4;
235 u8 bosr:1;
236 u8 usb:1;
237};
238
239/* codec mclk clock divider coefficients */
240static const struct _coeff_div coeff_div[] = {
241 /* 48k */
242 {12288000, 48000, 256, 0x0, 0x0, 0x0},
243 {18432000, 48000, 384, 0x0, 0x1, 0x0},
244 {12000000, 48000, 250, 0x0, 0x0, 0x1},
245
246 /* 32k */
247 {12288000, 32000, 384, 0x6, 0x0, 0x0},
248 {18432000, 32000, 576, 0x6, 0x1, 0x0},
Frank Mandarino298a2c72007-01-31 10:02:56 +0100249 {12000000, 32000, 375, 0x6, 0x0, 0x1},
Richard Purdie40e0aa62006-10-06 18:36:07 +0200250
251 /* 8k */
252 {12288000, 8000, 1536, 0x3, 0x0, 0x0},
253 {18432000, 8000, 2304, 0x3, 0x1, 0x0},
254 {11289600, 8000, 1408, 0xb, 0x0, 0x0},
255 {16934400, 8000, 2112, 0xb, 0x1, 0x0},
256 {12000000, 8000, 1500, 0x3, 0x0, 0x1},
257
258 /* 96k */
259 {12288000, 96000, 128, 0x7, 0x0, 0x0},
260 {18432000, 96000, 192, 0x7, 0x1, 0x0},
261 {12000000, 96000, 125, 0x7, 0x0, 0x1},
262
263 /* 44.1k */
264 {11289600, 44100, 256, 0x8, 0x0, 0x0},
265 {16934400, 44100, 384, 0x8, 0x1, 0x0},
266 {12000000, 44100, 272, 0x8, 0x1, 0x1},
267
268 /* 88.2k */
269 {11289600, 88200, 128, 0xf, 0x0, 0x0},
270 {16934400, 88200, 192, 0xf, 0x1, 0x0},
271 {12000000, 88200, 136, 0xf, 0x1, 0x1},
272};
273
274static inline int get_coeff(int mclk, int rate)
275{
276 int i;
277
278 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
279 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
280 return i;
281 }
282 return 0;
283}
284
Frank Mandarinob36d61d2007-02-02 17:14:56 +0100285static int wm8731_hw_params(struct snd_pcm_substream *substream,
286 struct snd_pcm_hw_params *params)
Richard Purdie40e0aa62006-10-06 18:36:07 +0200287{
Frank Mandarinob36d61d2007-02-02 17:14:56 +0100288 struct snd_soc_pcm_runtime *rtd = substream->private_data;
289 struct snd_soc_device *socdev = rtd->socdev;
290 struct snd_soc_codec *codec = socdev->codec;
291 struct wm8731_priv *wm8731 = codec->private_data;
292 u16 iface = wm8731_read_reg_cache(codec, WM8731_IFACE) & 0xfff3;
293 int i = get_coeff(wm8731->sysclk, params_rate(params));
294 u16 srate = (coeff_div[i].sr << 2) |
295 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
Richard Purdie40e0aa62006-10-06 18:36:07 +0200296
Frank Mandarinob36d61d2007-02-02 17:14:56 +0100297 wm8731_write(codec, WM8731_SRATE, srate);
Richard Purdie40e0aa62006-10-06 18:36:07 +0200298
Frank Mandarinob36d61d2007-02-02 17:14:56 +0100299 /* bit size */
300 switch (params_format(params)) {
301 case SNDRV_PCM_FORMAT_S16_LE:
302 break;
303 case SNDRV_PCM_FORMAT_S20_3LE:
304 iface |= 0x0004;
305 break;
306 case SNDRV_PCM_FORMAT_S24_LE:
307 iface |= 0x0008;
308 break;
309 }
310
311 wm8731_write(codec, WM8731_IFACE, iface);
312 return 0;
Richard Purdie40e0aa62006-10-06 18:36:07 +0200313}
314
315static int wm8731_pcm_prepare(struct snd_pcm_substream *substream)
316{
317 struct snd_soc_pcm_runtime *rtd = substream->private_data;
318 struct snd_soc_device *socdev = rtd->socdev;
319 struct snd_soc_codec *codec = socdev->codec;
Richard Purdie40e0aa62006-10-06 18:36:07 +0200320
321 /* set active */
322 wm8731_write(codec, WM8731_ACTIVE, 0x0001);
Frank Mandarinob36d61d2007-02-02 17:14:56 +0100323
Richard Purdie40e0aa62006-10-06 18:36:07 +0200324 return 0;
325}
326
327static void wm8731_shutdown(struct snd_pcm_substream *substream)
328{
329 struct snd_soc_pcm_runtime *rtd = substream->private_data;
330 struct snd_soc_device *socdev = rtd->socdev;
331 struct snd_soc_codec *codec = socdev->codec;
332
333 /* deactivate */
334 if (!codec->active) {
335 udelay(50);
336 wm8731_write(codec, WM8731_ACTIVE, 0x0);
337 }
338}
339
Frank Mandarinob36d61d2007-02-02 17:14:56 +0100340static int wm8731_mute(struct snd_soc_codec_dai *dai, int mute)
Richard Purdie40e0aa62006-10-06 18:36:07 +0200341{
Frank Mandarinob36d61d2007-02-02 17:14:56 +0100342 struct snd_soc_codec *codec = dai->codec;
Richard Purdie40e0aa62006-10-06 18:36:07 +0200343 u16 mute_reg = wm8731_read_reg_cache(codec, WM8731_APDIGI) & 0xfff7;
Frank Mandarinob36d61d2007-02-02 17:14:56 +0100344
Richard Purdie40e0aa62006-10-06 18:36:07 +0200345 if (mute)
346 wm8731_write(codec, WM8731_APDIGI, mute_reg | 0x8);
347 else
348 wm8731_write(codec, WM8731_APDIGI, mute_reg);
349 return 0;
350}
351
Frank Mandarinob36d61d2007-02-02 17:14:56 +0100352static int wm8731_set_dai_sysclk(struct snd_soc_codec_dai *codec_dai,
353 int clk_id, unsigned int freq, int dir)
354{
355 struct snd_soc_codec *codec = codec_dai->codec;
356 struct wm8731_priv *wm8731 = codec->private_data;
357
358 switch (freq) {
359 case 11289600:
360 case 12000000:
361 case 12288000:
362 case 16934400:
363 case 18432000:
364 wm8731->sysclk = freq;
365 return 0;
366 }
367 return -EINVAL;
368}
369
370
371static int wm8731_set_dai_fmt(struct snd_soc_codec_dai *codec_dai,
372 unsigned int fmt)
373{
374 struct snd_soc_codec *codec = codec_dai->codec;
375 u16 iface = 0;
376
377 /* set master/slave audio interface */
378 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
379 case SND_SOC_DAIFMT_CBM_CFM:
380 iface |= 0x0040;
381 break;
382 case SND_SOC_DAIFMT_CBS_CFS:
383 break;
384 default:
385 return -EINVAL;
386 }
387
388 /* interface format */
389 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
390 case SND_SOC_DAIFMT_I2S:
391 iface |= 0x0002;
392 break;
393 case SND_SOC_DAIFMT_RIGHT_J:
394 break;
395 case SND_SOC_DAIFMT_LEFT_J:
396 iface |= 0x0001;
397 break;
398 case SND_SOC_DAIFMT_DSP_A:
399 iface |= 0x0003;
400 break;
401 case SND_SOC_DAIFMT_DSP_B:
402 iface |= 0x0013;
403 break;
404 default:
405 return -EINVAL;
406 }
407
408 /* clock inversion */
409 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
410 case SND_SOC_DAIFMT_NB_NF:
411 break;
412 case SND_SOC_DAIFMT_IB_IF:
413 iface |= 0x0090;
414 break;
415 case SND_SOC_DAIFMT_IB_NF:
416 iface |= 0x0080;
417 break;
418 case SND_SOC_DAIFMT_NB_IF:
419 iface |= 0x0010;
420 break;
421 default:
422 return -EINVAL;
423 }
424
425 /* set iface */
426 wm8731_write(codec, WM8731_IFACE, iface);
427 return 0;
428}
429
Mark Brown0be98982008-05-19 12:31:28 +0200430static int wm8731_set_bias_level(struct snd_soc_codec *codec,
431 enum snd_soc_bias_level level)
Richard Purdie40e0aa62006-10-06 18:36:07 +0200432{
433 u16 reg = wm8731_read_reg_cache(codec, WM8731_PWR) & 0xff7f;
434
Mark Brown0be98982008-05-19 12:31:28 +0200435 switch (level) {
436 case SND_SOC_BIAS_ON:
Richard Purdie40e0aa62006-10-06 18:36:07 +0200437 /* vref/mid, osc on, dac unmute */
438 wm8731_write(codec, WM8731_PWR, reg);
439 break;
Mark Brown0be98982008-05-19 12:31:28 +0200440 case SND_SOC_BIAS_PREPARE:
Richard Purdie40e0aa62006-10-06 18:36:07 +0200441 break;
Mark Brown0be98982008-05-19 12:31:28 +0200442 case SND_SOC_BIAS_STANDBY:
Richard Purdie40e0aa62006-10-06 18:36:07 +0200443 /* everything off except vref/vmid, */
444 wm8731_write(codec, WM8731_PWR, reg | 0x0040);
445 break;
Mark Brown0be98982008-05-19 12:31:28 +0200446 case SND_SOC_BIAS_OFF:
Richard Purdie40e0aa62006-10-06 18:36:07 +0200447 /* everything off, dac mute, inactive */
448 wm8731_write(codec, WM8731_ACTIVE, 0x0);
449 wm8731_write(codec, WM8731_PWR, 0xffff);
450 break;
451 }
Mark Brown0be98982008-05-19 12:31:28 +0200452 codec->bias_level = level;
Richard Purdie40e0aa62006-10-06 18:36:07 +0200453 return 0;
454}
455
Frank Mandarinob36d61d2007-02-02 17:14:56 +0100456#define WM8731_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
457 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
458 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
459 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
460 SNDRV_PCM_RATE_96000)
461
462#define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
463 SNDRV_PCM_FMTBIT_S24_LE)
464
Richard Purdie40e0aa62006-10-06 18:36:07 +0200465struct snd_soc_codec_dai wm8731_dai = {
466 .name = "WM8731",
467 .playback = {
468 .stream_name = "Playback",
469 .channels_min = 1,
470 .channels_max = 2,
Frank Mandarinob36d61d2007-02-02 17:14:56 +0100471 .rates = WM8731_RATES,
472 .formats = WM8731_FORMATS,},
Richard Purdie40e0aa62006-10-06 18:36:07 +0200473 .capture = {
474 .stream_name = "Capture",
475 .channels_min = 1,
476 .channels_max = 2,
Frank Mandarinob36d61d2007-02-02 17:14:56 +0100477 .rates = WM8731_RATES,
478 .formats = WM8731_FORMATS,},
Richard Purdie40e0aa62006-10-06 18:36:07 +0200479 .ops = {
480 .prepare = wm8731_pcm_prepare,
Frank Mandarinob36d61d2007-02-02 17:14:56 +0100481 .hw_params = wm8731_hw_params,
Richard Purdie40e0aa62006-10-06 18:36:07 +0200482 .shutdown = wm8731_shutdown,
483 },
Frank Mandarinob36d61d2007-02-02 17:14:56 +0100484 .dai_ops = {
485 .digital_mute = wm8731_mute,
486 .set_sysclk = wm8731_set_dai_sysclk,
487 .set_fmt = wm8731_set_dai_fmt,
488 }
Richard Purdie40e0aa62006-10-06 18:36:07 +0200489};
490EXPORT_SYMBOL_GPL(wm8731_dai);
491
492static int wm8731_suspend(struct platform_device *pdev, pm_message_t state)
493{
494 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
495 struct snd_soc_codec *codec = socdev->codec;
496
497 wm8731_write(codec, WM8731_ACTIVE, 0x0);
Mark Brown0be98982008-05-19 12:31:28 +0200498 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
Richard Purdie40e0aa62006-10-06 18:36:07 +0200499 return 0;
500}
501
502static int wm8731_resume(struct platform_device *pdev)
503{
504 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
505 struct snd_soc_codec *codec = socdev->codec;
506 int i;
507 u8 data[2];
508 u16 *cache = codec->reg_cache;
509
510 /* Sync reg_cache with the hardware */
511 for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) {
512 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
513 data[1] = cache[i] & 0x00ff;
514 codec->hw_write(codec->control_data, data, 2);
515 }
Mark Brown0be98982008-05-19 12:31:28 +0200516 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
517 wm8731_set_bias_level(codec, codec->suspend_bias_level);
Richard Purdie40e0aa62006-10-06 18:36:07 +0200518 return 0;
519}
520
521/*
522 * initialise the WM8731 driver
523 * register the mixer and dsp interfaces with the kernel
524 */
525static int wm8731_init(struct snd_soc_device *socdev)
526{
527 struct snd_soc_codec *codec = socdev->codec;
528 int reg, ret = 0;
529
530 codec->name = "WM8731";
531 codec->owner = THIS_MODULE;
532 codec->read = wm8731_read_reg_cache;
533 codec->write = wm8731_write;
Mark Brown0be98982008-05-19 12:31:28 +0200534 codec->set_bias_level = wm8731_set_bias_level;
Richard Purdie40e0aa62006-10-06 18:36:07 +0200535 codec->dai = &wm8731_dai;
536 codec->num_dai = 1;
Takashi Iwai88cb4292007-02-05 14:56:20 +0100537 codec->reg_cache_size = sizeof(wm8731_reg);
538 codec->reg_cache = kmemdup(wm8731_reg, sizeof(wm8731_reg), GFP_KERNEL);
Richard Purdie40e0aa62006-10-06 18:36:07 +0200539 if (codec->reg_cache == NULL)
540 return -ENOMEM;
Richard Purdie40e0aa62006-10-06 18:36:07 +0200541
542 wm8731_reset(codec);
543
544 /* register pcms */
545 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
546 if (ret < 0) {
Liam Girdwoode35115a2007-01-31 10:02:23 +0100547 printk(KERN_ERR "wm8731: failed to create pcms\n");
548 goto pcm_err;
Richard Purdie40e0aa62006-10-06 18:36:07 +0200549 }
550
551 /* power on device */
Mark Brown0be98982008-05-19 12:31:28 +0200552 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
Richard Purdie40e0aa62006-10-06 18:36:07 +0200553
554 /* set the update bits */
555 reg = wm8731_read_reg_cache(codec, WM8731_LOUT1V);
Ville Syrjala389619f2007-11-26 08:58:24 +0100556 wm8731_write(codec, WM8731_LOUT1V, reg & ~0x0100);
Richard Purdie40e0aa62006-10-06 18:36:07 +0200557 reg = wm8731_read_reg_cache(codec, WM8731_ROUT1V);
Ville Syrjala389619f2007-11-26 08:58:24 +0100558 wm8731_write(codec, WM8731_ROUT1V, reg & ~0x0100);
Richard Purdie40e0aa62006-10-06 18:36:07 +0200559 reg = wm8731_read_reg_cache(codec, WM8731_LINVOL);
Ville Syrjala389619f2007-11-26 08:58:24 +0100560 wm8731_write(codec, WM8731_LINVOL, reg & ~0x0100);
Richard Purdie40e0aa62006-10-06 18:36:07 +0200561 reg = wm8731_read_reg_cache(codec, WM8731_RINVOL);
Ville Syrjala389619f2007-11-26 08:58:24 +0100562 wm8731_write(codec, WM8731_RINVOL, reg & ~0x0100);
Richard Purdie40e0aa62006-10-06 18:36:07 +0200563
564 wm8731_add_controls(codec);
565 wm8731_add_widgets(codec);
566 ret = snd_soc_register_card(socdev);
567 if (ret < 0) {
Liam Girdwoode35115a2007-01-31 10:02:23 +0100568 printk(KERN_ERR "wm8731: failed to register card\n");
569 goto card_err;
Richard Purdie40e0aa62006-10-06 18:36:07 +0200570 }
571
572 return ret;
Liam Girdwoode35115a2007-01-31 10:02:23 +0100573
574card_err:
575 snd_soc_free_pcms(socdev);
576 snd_soc_dapm_free(socdev);
577pcm_err:
578 kfree(codec->reg_cache);
579 return ret;
Richard Purdie40e0aa62006-10-06 18:36:07 +0200580}
581
582static struct snd_soc_device *wm8731_socdev;
583
Mark Brownd454aee2008-04-23 15:16:46 +0200584#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
Richard Purdie40e0aa62006-10-06 18:36:07 +0200585
586/*
587 * WM8731 2 wire address is determined by GPIO5
588 * state during powerup.
589 * low = 0x1a
590 * high = 0x1b
591 */
592static unsigned short normal_i2c[] = { 0, I2C_CLIENT_END };
593
594/* Magic definition of all other variables and things */
595I2C_CLIENT_INSMOD;
596
597static struct i2c_driver wm8731_i2c_driver;
598static struct i2c_client client_template;
599
600/* If the i2c layer weren't so broken, we could pass this kind of data
601 around */
602
603static int wm8731_codec_probe(struct i2c_adapter *adap, int addr, int kind)
604{
605 struct snd_soc_device *socdev = wm8731_socdev;
606 struct wm8731_setup_data *setup = socdev->codec_data;
607 struct snd_soc_codec *codec = socdev->codec;
608 struct i2c_client *i2c;
609 int ret;
610
611 if (addr != setup->i2c_address)
612 return -ENODEV;
613
614 client_template.adapter = adap;
615 client_template.addr = addr;
616
Takashi Iwai88cb4292007-02-05 14:56:20 +0100617 i2c = kmemdup(&client_template, sizeof(client_template), GFP_KERNEL);
Richard Purdie40e0aa62006-10-06 18:36:07 +0200618 if (i2c == NULL) {
619 kfree(codec);
620 return -ENOMEM;
621 }
Richard Purdie40e0aa62006-10-06 18:36:07 +0200622 i2c_set_clientdata(i2c, codec);
623 codec->control_data = i2c;
624
625 ret = i2c_attach_client(i2c);
626 if (ret < 0) {
627 err("failed to attach codec at addr %x\n", addr);
628 goto err;
629 }
630
631 ret = wm8731_init(socdev);
632 if (ret < 0) {
633 err("failed to initialise WM8731\n");
634 goto err;
635 }
636 return ret;
637
638err:
639 kfree(codec);
640 kfree(i2c);
641 return ret;
642}
643
644static int wm8731_i2c_detach(struct i2c_client *client)
645{
Mark Brownd454aee2008-04-23 15:16:46 +0200646 struct snd_soc_codec *codec = i2c_get_clientdata(client);
Richard Purdie40e0aa62006-10-06 18:36:07 +0200647 i2c_detach_client(client);
648 kfree(codec->reg_cache);
649 kfree(client);
650 return 0;
651}
652
653static int wm8731_i2c_attach(struct i2c_adapter *adap)
654{
655 return i2c_probe(adap, &addr_data, wm8731_codec_probe);
656}
657
658/* corgi i2c codec control layer */
659static struct i2c_driver wm8731_i2c_driver = {
660 .driver = {
661 .name = "WM8731 I2C Codec",
662 .owner = THIS_MODULE,
663 },
664 .id = I2C_DRIVERID_WM8731,
665 .attach_adapter = wm8731_i2c_attach,
666 .detach_client = wm8731_i2c_detach,
667 .command = NULL,
668};
669
670static struct i2c_client client_template = {
671 .name = "WM8731",
672 .driver = &wm8731_i2c_driver,
673};
674#endif
675
676static int wm8731_probe(struct platform_device *pdev)
677{
678 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
679 struct wm8731_setup_data *setup;
680 struct snd_soc_codec *codec;
Frank Mandarinob36d61d2007-02-02 17:14:56 +0100681 struct wm8731_priv *wm8731;
Richard Purdie40e0aa62006-10-06 18:36:07 +0200682 int ret = 0;
683
684 info("WM8731 Audio Codec %s", WM8731_VERSION);
685
686 setup = socdev->codec_data;
687 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
688 if (codec == NULL)
689 return -ENOMEM;
690
Frank Mandarinob36d61d2007-02-02 17:14:56 +0100691 wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL);
692 if (wm8731 == NULL) {
693 kfree(codec);
694 return -ENOMEM;
695 }
696
697 codec->private_data = wm8731;
Richard Purdie40e0aa62006-10-06 18:36:07 +0200698 socdev->codec = codec;
699 mutex_init(&codec->mutex);
700 INIT_LIST_HEAD(&codec->dapm_widgets);
701 INIT_LIST_HEAD(&codec->dapm_paths);
702
703 wm8731_socdev = socdev;
Mark Brownd454aee2008-04-23 15:16:46 +0200704#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
Richard Purdie40e0aa62006-10-06 18:36:07 +0200705 if (setup->i2c_address) {
706 normal_i2c[0] = setup->i2c_address;
707 codec->hw_write = (hw_write_t)i2c_master_send;
708 ret = i2c_add_driver(&wm8731_i2c_driver);
709 if (ret != 0)
710 printk(KERN_ERR "can't add i2c driver");
711 }
712#else
713 /* Add other interfaces here */
714#endif
715 return ret;
716}
717
718/* power down chip */
719static int wm8731_remove(struct platform_device *pdev)
720{
721 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
722 struct snd_soc_codec *codec = socdev->codec;
723
724 if (codec->control_data)
Mark Brown0be98982008-05-19 12:31:28 +0200725 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
Richard Purdie40e0aa62006-10-06 18:36:07 +0200726
727 snd_soc_free_pcms(socdev);
728 snd_soc_dapm_free(socdev);
Mark Brownd454aee2008-04-23 15:16:46 +0200729#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
Richard Purdie40e0aa62006-10-06 18:36:07 +0200730 i2c_del_driver(&wm8731_i2c_driver);
731#endif
Frank Mandarinob36d61d2007-02-02 17:14:56 +0100732 kfree(codec->private_data);
Richard Purdie40e0aa62006-10-06 18:36:07 +0200733 kfree(codec);
734
735 return 0;
736}
737
738struct snd_soc_codec_device soc_codec_dev_wm8731 = {
739 .probe = wm8731_probe,
740 .remove = wm8731_remove,
741 .suspend = wm8731_suspend,
742 .resume = wm8731_resume,
743};
Richard Purdie40e0aa62006-10-06 18:36:07 +0200744EXPORT_SYMBOL_GPL(soc_codec_dev_wm8731);
745
746MODULE_DESCRIPTION("ASoC WM8731 driver");
747MODULE_AUTHOR("Richard Purdie");
748MODULE_LICENSE("GPL");