2 * wm8523.c -- WM8523 ALSA SoC Audio driver
4 * Copyright 2009 Wolfson Microelectronics plc
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/init.h>
17 #include <linux/delay.h>
19 #include <linux/i2c.h>
20 #include <linux/platform_device.h>
21 #include <linux/regulator/consumer.h>
22 #include <linux/slab.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>
29 #include <sound/tlv.h>
33 #define WM8523_NUM_SUPPLIES 2
34 static const char *wm8523_supply_names[WM8523_NUM_SUPPLIES] = {
39 #define WM8523_NUM_RATES 7
41 /* codec private data */
43 enum snd_soc_control_type control_type;
44 u16 reg_cache[WM8523_REGISTER_COUNT];
45 struct regulator_bulk_data supplies[WM8523_NUM_SUPPLIES];
47 unsigned int rate_constraint_list[WM8523_NUM_RATES];
48 struct snd_pcm_hw_constraint_list rate_constraint;
51 static const u16 wm8523_reg[WM8523_REGISTER_COUNT] = {
52 0x8523, /* R0 - DEVICE_ID */
53 0x0001, /* R1 - REVISION */
54 0x0000, /* R2 - PSCTRL1 */
55 0x1812, /* R3 - AIF_CTRL1 */
56 0x0000, /* R4 - AIF_CTRL2 */
57 0x0001, /* R5 - DAC_CTRL3 */
58 0x0190, /* R6 - DAC_GAINL */
59 0x0190, /* R7 - DAC_GAINR */
60 0x0000, /* R8 - ZERO_DETECT */
63 static int wm8523_volatile_register(unsigned int reg)
66 case WM8523_DEVICE_ID:
74 static int wm8523_reset(struct snd_soc_codec *codec)
76 return snd_soc_write(codec, WM8523_DEVICE_ID, 0);
79 static const DECLARE_TLV_DB_SCALE(dac_tlv, -10000, 25, 0);
81 static const char *wm8523_zd_count_text[] = {
86 static const struct soc_enum wm8523_zc_count =
87 SOC_ENUM_SINGLE(WM8523_ZERO_DETECT, 0, 2, wm8523_zd_count_text);
89 static const struct snd_kcontrol_new wm8523_snd_controls[] = {
90 SOC_DOUBLE_R_TLV("Playback Volume", WM8523_DAC_GAINL, WM8523_DAC_GAINR,
92 SOC_SINGLE("ZC Switch", WM8523_DAC_CTRL3, 4, 1, 0),
93 SOC_SINGLE("Playback Deemphasis Switch", WM8523_AIF_CTRL1, 8, 1, 0),
94 SOC_DOUBLE("Playback Switch", WM8523_DAC_CTRL3, 2, 3, 1, 1),
95 SOC_SINGLE("Volume Ramp Up Switch", WM8523_DAC_CTRL3, 1, 1, 0),
96 SOC_SINGLE("Volume Ramp Down Switch", WM8523_DAC_CTRL3, 0, 1, 0),
97 SOC_ENUM("Zero Detect Count", wm8523_zc_count),
100 static const struct snd_soc_dapm_widget wm8523_dapm_widgets[] = {
101 SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
102 SND_SOC_DAPM_OUTPUT("LINEVOUTL"),
103 SND_SOC_DAPM_OUTPUT("LINEVOUTR"),
106 static const struct snd_soc_dapm_route intercon[] = {
107 { "LINEVOUTL", NULL, "DAC" },
108 { "LINEVOUTR", NULL, "DAC" },
111 static int wm8523_add_widgets(struct snd_soc_codec *codec)
113 snd_soc_dapm_new_controls(codec, wm8523_dapm_widgets,
114 ARRAY_SIZE(wm8523_dapm_widgets));
116 snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
124 } lrclk_ratios[WM8523_NUM_RATES] = {
134 static int wm8523_startup(struct snd_pcm_substream *substream,
135 struct snd_soc_dai *dai)
137 struct snd_soc_codec *codec = dai->codec;
138 struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec);
140 /* The set of sample rates that can be supported depends on the
141 * MCLK supplied to the CODEC - enforce this.
143 if (!wm8523->sysclk) {
145 "No MCLK configured, call set_sysclk() on init\n");
150 snd_pcm_hw_constraint_list(substream->runtime, 0,
151 SNDRV_PCM_HW_PARAM_RATE,
152 &wm8523->rate_constraint);
157 static int wm8523_hw_params(struct snd_pcm_substream *substream,
158 struct snd_pcm_hw_params *params,
159 struct snd_soc_dai *dai)
161 struct snd_soc_pcm_runtime *rtd = substream->private_data;
162 struct snd_soc_codec *codec = rtd->codec;
163 struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec);
165 u16 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1);
166 u16 aifctrl2 = snd_soc_read(codec, WM8523_AIF_CTRL2);
168 /* Find a supported LRCLK ratio */
169 for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
170 if (wm8523->sysclk / params_rate(params) ==
171 lrclk_ratios[i].ratio)
175 /* Should never happen, should be handled by constraints */
176 if (i == ARRAY_SIZE(lrclk_ratios)) {
177 dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n",
178 wm8523->sysclk / params_rate(params));
182 aifctrl2 &= ~WM8523_SR_MASK;
183 aifctrl2 |= lrclk_ratios[i].value;
185 aifctrl1 &= ~WM8523_WL_MASK;
186 switch (params_format(params)) {
187 case SNDRV_PCM_FORMAT_S16_LE:
189 case SNDRV_PCM_FORMAT_S20_3LE:
192 case SNDRV_PCM_FORMAT_S24_LE:
195 case SNDRV_PCM_FORMAT_S32_LE:
200 snd_soc_write(codec, WM8523_AIF_CTRL1, aifctrl1);
201 snd_soc_write(codec, WM8523_AIF_CTRL2, aifctrl2);
206 static int wm8523_set_dai_sysclk(struct snd_soc_dai *codec_dai,
207 int clk_id, unsigned int freq, int dir)
209 struct snd_soc_codec *codec = codec_dai->codec;
210 struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec);
214 wm8523->sysclk = freq;
216 wm8523->rate_constraint.count = 0;
217 for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
218 val = freq / lrclk_ratios[i].ratio;
219 /* Check that it's a standard rate since core can't
220 * cope with others and having the odd rates confuses
221 * constraint matching.
236 dev_dbg(codec->dev, "Supported sample rate: %dHz\n",
238 wm8523->rate_constraint_list[i] = val;
239 wm8523->rate_constraint.count++;
242 dev_dbg(codec->dev, "Skipping sample rate: %dHz\n",
247 /* Need at least one supported rate... */
248 if (wm8523->rate_constraint.count == 0)
255 static int wm8523_set_dai_fmt(struct snd_soc_dai *codec_dai,
258 struct snd_soc_codec *codec = codec_dai->codec;
259 u16 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1);
261 aifctrl1 &= ~(WM8523_BCLK_INV_MASK | WM8523_LRCLK_INV_MASK |
262 WM8523_FMT_MASK | WM8523_AIF_MSTR_MASK);
264 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
265 case SND_SOC_DAIFMT_CBM_CFM:
266 aifctrl1 |= WM8523_AIF_MSTR;
268 case SND_SOC_DAIFMT_CBS_CFS:
274 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
275 case SND_SOC_DAIFMT_I2S:
278 case SND_SOC_DAIFMT_RIGHT_J:
280 case SND_SOC_DAIFMT_LEFT_J:
283 case SND_SOC_DAIFMT_DSP_A:
286 case SND_SOC_DAIFMT_DSP_B:
293 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
294 case SND_SOC_DAIFMT_NB_NF:
296 case SND_SOC_DAIFMT_IB_IF:
297 aifctrl1 |= WM8523_BCLK_INV | WM8523_LRCLK_INV;
299 case SND_SOC_DAIFMT_IB_NF:
300 aifctrl1 |= WM8523_BCLK_INV;
302 case SND_SOC_DAIFMT_NB_IF:
303 aifctrl1 |= WM8523_LRCLK_INV;
309 snd_soc_write(codec, WM8523_AIF_CTRL1, aifctrl1);
314 static int wm8523_set_bias_level(struct snd_soc_codec *codec,
315 enum snd_soc_bias_level level)
317 struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec);
321 case SND_SOC_BIAS_ON:
324 case SND_SOC_BIAS_PREPARE:
326 snd_soc_update_bits(codec, WM8523_PSCTRL1,
327 WM8523_SYS_ENA_MASK, 3);
330 case SND_SOC_BIAS_STANDBY:
331 if (codec->bias_level == SND_SOC_BIAS_OFF) {
332 ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies),
336 "Failed to enable supplies: %d\n",
341 /* Initial power up */
342 snd_soc_update_bits(codec, WM8523_PSCTRL1,
343 WM8523_SYS_ENA_MASK, 1);
345 /* Sync back default/cached values */
346 for (i = WM8523_AIF_CTRL1;
347 i < WM8523_MAX_REGISTER; i++)
348 snd_soc_write(codec, i, wm8523->reg_cache[i]);
354 /* Power up to mute */
355 snd_soc_update_bits(codec, WM8523_PSCTRL1,
356 WM8523_SYS_ENA_MASK, 2);
360 case SND_SOC_BIAS_OFF:
361 /* The chip runs through the power down sequence for us. */
362 snd_soc_update_bits(codec, WM8523_PSCTRL1,
363 WM8523_SYS_ENA_MASK, 0);
366 regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies),
370 codec->bias_level = level;
374 #define WM8523_RATES SNDRV_PCM_RATE_8000_192000
376 #define WM8523_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
377 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
379 static struct snd_soc_dai_ops wm8523_dai_ops = {
380 .startup = wm8523_startup,
381 .hw_params = wm8523_hw_params,
382 .set_sysclk = wm8523_set_dai_sysclk,
383 .set_fmt = wm8523_set_dai_fmt,
386 static struct snd_soc_dai_driver wm8523_dai = {
387 .name = "wm8523-hifi",
389 .stream_name = "Playback",
390 .channels_min = 2, /* Mono modes not yet supported */
392 .rates = WM8523_RATES,
393 .formats = WM8523_FORMATS,
395 .ops = &wm8523_dai_ops,
399 static int wm8523_suspend(struct snd_soc_codec *codec, pm_message_t state)
401 wm8523_set_bias_level(codec, SND_SOC_BIAS_OFF);
405 static int wm8523_resume(struct snd_soc_codec *codec)
407 wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
411 #define wm8523_suspend NULL
412 #define wm8523_resume NULL
415 static int wm8523_probe(struct snd_soc_codec *codec)
417 struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec);
420 codec->hw_write = (hw_write_t)i2c_master_send;
421 wm8523->rate_constraint.list = &wm8523->rate_constraint_list[0];
422 wm8523->rate_constraint.count =
423 ARRAY_SIZE(wm8523->rate_constraint_list);
425 ret = snd_soc_codec_set_cache_io(codec, 8, 16, wm8523->control_type);
427 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
431 for (i = 0; i < ARRAY_SIZE(wm8523->supplies); i++)
432 wm8523->supplies[i].supply = wm8523_supply_names[i];
434 ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8523->supplies),
437 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
441 ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies),
444 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
448 ret = snd_soc_read(codec, WM8523_DEVICE_ID);
450 dev_err(codec->dev, "Failed to read ID register\n");
453 if (ret != wm8523_reg[WM8523_DEVICE_ID]) {
454 dev_err(codec->dev, "Device is not a WM8523, ID is %x\n", ret);
459 ret = snd_soc_read(codec, WM8523_REVISION);
461 dev_err(codec->dev, "Failed to read revision register\n");
464 dev_info(codec->dev, "revision %c\n",
465 (ret & WM8523_CHIP_REV_MASK) + 'A');
467 ret = wm8523_reset(codec);
469 dev_err(codec->dev, "Failed to issue reset\n");
473 /* Change some default settings - latch VU and enable ZC */
474 wm8523->reg_cache[WM8523_DAC_GAINR] |= WM8523_DACR_VU;
475 wm8523->reg_cache[WM8523_DAC_CTRL3] |= WM8523_ZC;
477 wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
479 /* Bias level configuration will have done an extra enable */
480 regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
482 snd_soc_add_controls(codec, wm8523_snd_controls,
483 ARRAY_SIZE(wm8523_snd_controls));
484 wm8523_add_widgets(codec);
489 regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
491 regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
496 static int wm8523_remove(struct snd_soc_codec *codec)
498 struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec);
500 wm8523_set_bias_level(codec, SND_SOC_BIAS_OFF);
501 regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
505 static struct snd_soc_codec_driver soc_codec_dev_wm8523 = {
506 .probe = wm8523_probe,
507 .remove = wm8523_remove,
508 .suspend = wm8523_suspend,
509 .resume = wm8523_resume,
510 .set_bias_level = wm8523_set_bias_level,
511 .reg_cache_size = WM8523_REGISTER_COUNT,
512 .reg_word_size = sizeof(u16),
513 .reg_cache_default = wm8523_reg,
514 .volatile_register = wm8523_volatile_register,
517 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
518 static __devinit int wm8523_i2c_probe(struct i2c_client *i2c,
519 const struct i2c_device_id *id)
521 struct wm8523_priv *wm8523;
524 wm8523 = kzalloc(sizeof(struct wm8523_priv), GFP_KERNEL);
528 i2c_set_clientdata(i2c, wm8523);
529 wm8523->control_type = SND_SOC_I2C;
531 ret = snd_soc_register_codec(&i2c->dev,
532 &soc_codec_dev_wm8523, &wm8523_dai, 1);
539 static __devexit int wm8523_i2c_remove(struct i2c_client *client)
541 snd_soc_unregister_codec(&client->dev);
542 kfree(i2c_get_clientdata(client));
546 static const struct i2c_device_id wm8523_i2c_id[] = {
550 MODULE_DEVICE_TABLE(i2c, wm8523_i2c_id);
552 static struct i2c_driver wm8523_i2c_driver = {
554 .name = "wm8523-codec",
555 .owner = THIS_MODULE,
557 .probe = wm8523_i2c_probe,
558 .remove = __devexit_p(wm8523_i2c_remove),
559 .id_table = wm8523_i2c_id,
563 static int __init wm8523_modinit(void)
566 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
567 ret = i2c_add_driver(&wm8523_i2c_driver);
569 printk(KERN_ERR "Failed to register WM8523 I2C driver: %d\n",
575 module_init(wm8523_modinit);
577 static void __exit wm8523_exit(void)
579 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
580 i2c_del_driver(&wm8523_i2c_driver);
583 module_exit(wm8523_exit);
585 MODULE_DESCRIPTION("ASoC WM8523 driver");
586 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
587 MODULE_LICENSE("GPL");