171cfc902SMark Brown /* 271cfc902SMark Brown * wm8728.c -- WM8728 ALSA SoC Audio driver 371cfc902SMark Brown * 471cfc902SMark Brown * Copyright 2008 Wolfson Microelectronics plc 571cfc902SMark Brown * 671cfc902SMark Brown * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 771cfc902SMark Brown * 871cfc902SMark Brown * This program is free software; you can redistribute it and/or modify 971cfc902SMark Brown * it under the terms of the GNU General Public License version 2 as 1071cfc902SMark Brown * published by the Free Software Foundation. 1171cfc902SMark Brown */ 1271cfc902SMark Brown 1371cfc902SMark Brown #include <linux/module.h> 1471cfc902SMark Brown #include <linux/moduleparam.h> 1571cfc902SMark Brown #include <linux/init.h> 1671cfc902SMark Brown #include <linux/delay.h> 1771cfc902SMark Brown #include <linux/pm.h> 1871cfc902SMark Brown #include <linux/i2c.h> 1971cfc902SMark Brown #include <linux/platform_device.h> 20d16383efSMark Brown #include <linux/regmap.h> 2171cfc902SMark Brown #include <linux/spi/spi.h> 225a0e3ad6STejun Heo #include <linux/slab.h> 2345b4d043SMark Brown #include <linux/of_device.h> 2471cfc902SMark Brown #include <sound/core.h> 2571cfc902SMark Brown #include <sound/pcm.h> 2671cfc902SMark Brown #include <sound/pcm_params.h> 2771cfc902SMark Brown #include <sound/soc.h> 2871cfc902SMark Brown #include <sound/initval.h> 2971cfc902SMark Brown #include <sound/tlv.h> 3071cfc902SMark Brown 3171cfc902SMark Brown #include "wm8728.h" 3271cfc902SMark Brown 3371cfc902SMark Brown /* 3471cfc902SMark Brown * We can't read the WM8728 register space so we cache them instead. 3571cfc902SMark Brown * Note that the defaults here aren't the physical defaults, we latch 3671cfc902SMark Brown * the volume update bits, mute the output and enable infinite zero 3771cfc902SMark Brown * detect. 3871cfc902SMark Brown */ 39d16383efSMark Brown static const struct reg_default wm8728_reg_defaults[] = { 40d16383efSMark Brown { 0, 0x1ff }, 41d16383efSMark Brown { 1, 0x1ff }, 42d16383efSMark Brown { 2, 0x001 }, 43d16383efSMark Brown { 3, 0x100 }, 4471cfc902SMark Brown }; 4571cfc902SMark Brown 46f0fba2adSLiam Girdwood /* codec private data */ 47f0fba2adSLiam Girdwood struct wm8728_priv { 48d16383efSMark Brown struct regmap *regmap; 49f0fba2adSLiam Girdwood }; 50f0fba2adSLiam Girdwood 5171cfc902SMark Brown static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1); 5271cfc902SMark Brown 5371cfc902SMark Brown static const struct snd_kcontrol_new wm8728_snd_controls[] = { 5471cfc902SMark Brown 5571cfc902SMark Brown SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL, 5671cfc902SMark Brown 0, 255, 0, wm8728_tlv), 5771cfc902SMark Brown 5871cfc902SMark Brown SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0), 5971cfc902SMark Brown }; 6071cfc902SMark Brown 6171cfc902SMark Brown /* 6271cfc902SMark Brown * DAPM controls. 6371cfc902SMark Brown */ 6471cfc902SMark Brown static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = { 6571cfc902SMark Brown SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0), 6671cfc902SMark Brown SND_SOC_DAPM_OUTPUT("VOUTL"), 6771cfc902SMark Brown SND_SOC_DAPM_OUTPUT("VOUTR"), 6871cfc902SMark Brown }; 6971cfc902SMark Brown 708428edf9SLu Guanqun static const struct snd_soc_dapm_route wm8728_intercon[] = { 7171cfc902SMark Brown {"VOUTL", NULL, "DAC"}, 7271cfc902SMark Brown {"VOUTR", NULL, "DAC"}, 7371cfc902SMark Brown }; 7471cfc902SMark Brown 7571cfc902SMark Brown static int wm8728_mute(struct snd_soc_dai *dai, int mute) 7671cfc902SMark Brown { 7771cfc902SMark Brown struct snd_soc_codec *codec = dai->codec; 7817a52fd6SMark Brown u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL); 7971cfc902SMark Brown 8071cfc902SMark Brown if (mute) 8117a52fd6SMark Brown snd_soc_write(codec, WM8728_DACCTL, mute_reg | 1); 8271cfc902SMark Brown else 8317a52fd6SMark Brown snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1); 8471cfc902SMark Brown 8571cfc902SMark Brown return 0; 8671cfc902SMark Brown } 8771cfc902SMark Brown 8871cfc902SMark Brown static int wm8728_hw_params(struct snd_pcm_substream *substream, 89dee89c4dSMark Brown struct snd_pcm_hw_params *params, 90dee89c4dSMark Brown struct snd_soc_dai *dai) 9171cfc902SMark Brown { 92e6968a17SMark Brown struct snd_soc_codec *codec = dai->codec; 9317a52fd6SMark Brown u16 dac = snd_soc_read(codec, WM8728_DACCTL); 9471cfc902SMark Brown 9571cfc902SMark Brown dac &= ~0x18; 9671cfc902SMark Brown 9771cfc902SMark Brown switch (params_format(params)) { 9871cfc902SMark Brown case SNDRV_PCM_FORMAT_S16_LE: 9971cfc902SMark Brown break; 10071cfc902SMark Brown case SNDRV_PCM_FORMAT_S20_3LE: 10171cfc902SMark Brown dac |= 0x10; 10271cfc902SMark Brown break; 10371cfc902SMark Brown case SNDRV_PCM_FORMAT_S24_LE: 10471cfc902SMark Brown dac |= 0x08; 10571cfc902SMark Brown break; 10671cfc902SMark Brown default: 10771cfc902SMark Brown return -EINVAL; 10871cfc902SMark Brown } 10971cfc902SMark Brown 11017a52fd6SMark Brown snd_soc_write(codec, WM8728_DACCTL, dac); 11171cfc902SMark Brown 11271cfc902SMark Brown return 0; 11371cfc902SMark Brown } 11471cfc902SMark Brown 11571cfc902SMark Brown static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai, 11671cfc902SMark Brown unsigned int fmt) 11771cfc902SMark Brown { 11871cfc902SMark Brown struct snd_soc_codec *codec = codec_dai->codec; 11917a52fd6SMark Brown u16 iface = snd_soc_read(codec, WM8728_IFCTL); 12071cfc902SMark Brown 12171cfc902SMark Brown /* Currently only I2S is supported by the driver, though the 12271cfc902SMark Brown * hardware is more flexible. 12371cfc902SMark Brown */ 12471cfc902SMark Brown switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 12571cfc902SMark Brown case SND_SOC_DAIFMT_I2S: 12671cfc902SMark Brown iface |= 1; 12771cfc902SMark Brown break; 12871cfc902SMark Brown default: 12971cfc902SMark Brown return -EINVAL; 13071cfc902SMark Brown } 13171cfc902SMark Brown 13271cfc902SMark Brown /* The hardware only support full slave mode */ 13371cfc902SMark Brown switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 13471cfc902SMark Brown case SND_SOC_DAIFMT_CBS_CFS: 13571cfc902SMark Brown break; 13671cfc902SMark Brown default: 13771cfc902SMark Brown return -EINVAL; 13871cfc902SMark Brown } 13971cfc902SMark Brown 14071cfc902SMark Brown switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 14171cfc902SMark Brown case SND_SOC_DAIFMT_NB_NF: 14271cfc902SMark Brown iface &= ~0x22; 14371cfc902SMark Brown break; 14471cfc902SMark Brown case SND_SOC_DAIFMT_IB_NF: 14571cfc902SMark Brown iface |= 0x20; 14671cfc902SMark Brown iface &= ~0x02; 14771cfc902SMark Brown break; 14871cfc902SMark Brown case SND_SOC_DAIFMT_NB_IF: 14971cfc902SMark Brown iface |= 0x02; 15071cfc902SMark Brown iface &= ~0x20; 15171cfc902SMark Brown break; 15271cfc902SMark Brown case SND_SOC_DAIFMT_IB_IF: 15371cfc902SMark Brown iface |= 0x22; 15471cfc902SMark Brown break; 15571cfc902SMark Brown default: 15671cfc902SMark Brown return -EINVAL; 15771cfc902SMark Brown } 15871cfc902SMark Brown 15917a52fd6SMark Brown snd_soc_write(codec, WM8728_IFCTL, iface); 16071cfc902SMark Brown return 0; 16171cfc902SMark Brown } 16271cfc902SMark Brown 16371cfc902SMark Brown static int wm8728_set_bias_level(struct snd_soc_codec *codec, 16471cfc902SMark Brown enum snd_soc_bias_level level) 16571cfc902SMark Brown { 166d16383efSMark Brown struct wm8728_priv *wm8728 = snd_soc_codec_get_drvdata(codec); 16771cfc902SMark Brown u16 reg; 16871cfc902SMark Brown 16971cfc902SMark Brown switch (level) { 17071cfc902SMark Brown case SND_SOC_BIAS_ON: 17171cfc902SMark Brown case SND_SOC_BIAS_PREPARE: 17271cfc902SMark Brown case SND_SOC_BIAS_STANDBY: 173ce6120ccSLiam Girdwood if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { 17471cfc902SMark Brown /* Power everything up... */ 17517a52fd6SMark Brown reg = snd_soc_read(codec, WM8728_DACCTL); 17617a52fd6SMark Brown snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4); 17771cfc902SMark Brown 17871cfc902SMark Brown /* ..then sync in the register cache. */ 179d16383efSMark Brown regcache_sync(wm8728->regmap); 18071cfc902SMark Brown } 18171cfc902SMark Brown break; 18271cfc902SMark Brown 18371cfc902SMark Brown case SND_SOC_BIAS_OFF: 18417a52fd6SMark Brown reg = snd_soc_read(codec, WM8728_DACCTL); 18517a52fd6SMark Brown snd_soc_write(codec, WM8728_DACCTL, reg | 0x4); 18671cfc902SMark Brown break; 18771cfc902SMark Brown } 188ce6120ccSLiam Girdwood codec->dapm.bias_level = level; 18971cfc902SMark Brown return 0; 19071cfc902SMark Brown } 19171cfc902SMark Brown 19271cfc902SMark Brown #define WM8728_RATES (SNDRV_PCM_RATE_8000_192000) 19371cfc902SMark Brown 19471cfc902SMark Brown #define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 19571cfc902SMark Brown SNDRV_PCM_FMTBIT_S24_LE) 19671cfc902SMark Brown 19785e7652dSLars-Peter Clausen static const struct snd_soc_dai_ops wm8728_dai_ops = { 1986335d055SEric Miao .hw_params = wm8728_hw_params, 1996335d055SEric Miao .digital_mute = wm8728_mute, 2006335d055SEric Miao .set_fmt = wm8728_set_dai_fmt, 2016335d055SEric Miao }; 2026335d055SEric Miao 203f0fba2adSLiam Girdwood static struct snd_soc_dai_driver wm8728_dai = { 204f0fba2adSLiam Girdwood .name = "wm8728-hifi", 20571cfc902SMark Brown .playback = { 20671cfc902SMark Brown .stream_name = "Playback", 20771cfc902SMark Brown .channels_min = 2, 20871cfc902SMark Brown .channels_max = 2, 20971cfc902SMark Brown .rates = WM8728_RATES, 21071cfc902SMark Brown .formats = WM8728_FORMATS, 21171cfc902SMark Brown }, 2126335d055SEric Miao .ops = &wm8728_dai_ops, 21371cfc902SMark Brown }; 21471cfc902SMark Brown 21584b315eeSLars-Peter Clausen static int wm8728_suspend(struct snd_soc_codec *codec) 21671cfc902SMark Brown { 21771cfc902SMark Brown wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF); 21871cfc902SMark Brown 21971cfc902SMark Brown return 0; 22071cfc902SMark Brown } 22171cfc902SMark Brown 222f0fba2adSLiam Girdwood static int wm8728_resume(struct snd_soc_codec *codec) 22371cfc902SMark Brown { 22429e189c2SMark Brown wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 22571cfc902SMark Brown 22671cfc902SMark Brown return 0; 22771cfc902SMark Brown } 22871cfc902SMark Brown 229f0fba2adSLiam Girdwood static int wm8728_probe(struct snd_soc_codec *codec) 23071cfc902SMark Brown { 23171cfc902SMark Brown /* power on device */ 23271cfc902SMark Brown wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 23371cfc902SMark Brown 2345d6be5aaSXiubo Li return 0; 23571cfc902SMark Brown } 23671cfc902SMark Brown 237f0fba2adSLiam Girdwood static int wm8728_remove(struct snd_soc_codec *codec) 23871cfc902SMark Brown { 239f0fba2adSLiam Girdwood wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF); 240f0fba2adSLiam Girdwood return 0; 241f0fba2adSLiam Girdwood } 242f0fba2adSLiam Girdwood 243f0fba2adSLiam Girdwood static struct snd_soc_codec_driver soc_codec_dev_wm8728 = { 244f0fba2adSLiam Girdwood .probe = wm8728_probe, 245f0fba2adSLiam Girdwood .remove = wm8728_remove, 246f0fba2adSLiam Girdwood .suspend = wm8728_suspend, 247f0fba2adSLiam Girdwood .resume = wm8728_resume, 248f0fba2adSLiam Girdwood .set_bias_level = wm8728_set_bias_level, 249e41d5a3bSMark Brown .controls = wm8728_snd_controls, 250e41d5a3bSMark Brown .num_controls = ARRAY_SIZE(wm8728_snd_controls), 2518428edf9SLu Guanqun .dapm_widgets = wm8728_dapm_widgets, 2528428edf9SLu Guanqun .num_dapm_widgets = ARRAY_SIZE(wm8728_dapm_widgets), 2538428edf9SLu Guanqun .dapm_routes = wm8728_intercon, 2548428edf9SLu Guanqun .num_dapm_routes = ARRAY_SIZE(wm8728_intercon), 255f0fba2adSLiam Girdwood }; 256f0fba2adSLiam Girdwood 25745b4d043SMark Brown static const struct of_device_id wm8728_of_match[] = { 25845b4d043SMark Brown { .compatible = "wlf,wm8728", }, 25945b4d043SMark Brown { } 26045b4d043SMark Brown }; 26145b4d043SMark Brown MODULE_DEVICE_TABLE(of, wm8728_of_match); 26245b4d043SMark Brown 263d16383efSMark Brown static const struct regmap_config wm8728_regmap = { 264d16383efSMark Brown .reg_bits = 7, 265d16383efSMark Brown .val_bits = 9, 266d16383efSMark Brown .max_register = WM8728_IFCTL, 267d16383efSMark Brown 268d16383efSMark Brown .reg_defaults = wm8728_reg_defaults, 269d16383efSMark Brown .num_reg_defaults = ARRAY_SIZE(wm8728_reg_defaults), 270d16383efSMark Brown .cache_type = REGCACHE_RBTREE, 271d16383efSMark Brown }; 272d16383efSMark Brown 273f0fba2adSLiam Girdwood #if defined(CONFIG_SPI_MASTER) 2747a79e94eSBill Pemberton static int wm8728_spi_probe(struct spi_device *spi) 275f0fba2adSLiam Girdwood { 276f0fba2adSLiam Girdwood struct wm8728_priv *wm8728; 27771cfc902SMark Brown int ret; 27871cfc902SMark Brown 2791a9585b0SMark Brown wm8728 = devm_kzalloc(&spi->dev, sizeof(struct wm8728_priv), 2801a9585b0SMark Brown GFP_KERNEL); 281f0fba2adSLiam Girdwood if (wm8728 == NULL) 282f0fba2adSLiam Girdwood return -ENOMEM; 28371cfc902SMark Brown 284d16383efSMark Brown wm8728->regmap = devm_regmap_init_spi(spi, &wm8728_regmap); 285d16383efSMark Brown if (IS_ERR(wm8728->regmap)) 286d16383efSMark Brown return PTR_ERR(wm8728->regmap); 287d16383efSMark Brown 288f0fba2adSLiam Girdwood spi_set_drvdata(spi, wm8728); 289f0fba2adSLiam Girdwood 290f0fba2adSLiam Girdwood ret = snd_soc_register_codec(&spi->dev, 291f0fba2adSLiam Girdwood &soc_codec_dev_wm8728, &wm8728_dai, 1); 2921a9585b0SMark Brown 29371cfc902SMark Brown return ret; 29471cfc902SMark Brown } 29571cfc902SMark Brown 2967a79e94eSBill Pemberton static int wm8728_spi_remove(struct spi_device *spi) 29771cfc902SMark Brown { 298f0fba2adSLiam Girdwood snd_soc_unregister_codec(&spi->dev); 2991a9585b0SMark Brown 300f0fba2adSLiam Girdwood return 0; 301f0fba2adSLiam Girdwood } 302f0fba2adSLiam Girdwood 303f0fba2adSLiam Girdwood static struct spi_driver wm8728_spi_driver = { 304f0fba2adSLiam Girdwood .driver = { 3050473e61bSMark Brown .name = "wm8728", 306f0fba2adSLiam Girdwood .owner = THIS_MODULE, 30745b4d043SMark Brown .of_match_table = wm8728_of_match, 308f0fba2adSLiam Girdwood }, 309f0fba2adSLiam Girdwood .probe = wm8728_spi_probe, 3107a79e94eSBill Pemberton .remove = wm8728_spi_remove, 311f0fba2adSLiam Girdwood }; 312f0fba2adSLiam Girdwood #endif /* CONFIG_SPI_MASTER */ 313f0fba2adSLiam Girdwood 3145c153716SFabio Estevam #if IS_ENABLED(CONFIG_I2C) 3157a79e94eSBill Pemberton static int wm8728_i2c_probe(struct i2c_client *i2c, 316f0fba2adSLiam Girdwood const struct i2c_device_id *id) 317f0fba2adSLiam Girdwood { 318f0fba2adSLiam Girdwood struct wm8728_priv *wm8728; 319f0fba2adSLiam Girdwood int ret; 320f0fba2adSLiam Girdwood 3211a9585b0SMark Brown wm8728 = devm_kzalloc(&i2c->dev, sizeof(struct wm8728_priv), 3221a9585b0SMark Brown GFP_KERNEL); 323f0fba2adSLiam Girdwood if (wm8728 == NULL) 324f0fba2adSLiam Girdwood return -ENOMEM; 325f0fba2adSLiam Girdwood 326d16383efSMark Brown wm8728->regmap = devm_regmap_init_i2c(i2c, &wm8728_regmap); 327d16383efSMark Brown if (IS_ERR(wm8728->regmap)) 328d16383efSMark Brown return PTR_ERR(wm8728->regmap); 329d16383efSMark Brown 330f0fba2adSLiam Girdwood i2c_set_clientdata(i2c, wm8728); 331f0fba2adSLiam Girdwood 332f0fba2adSLiam Girdwood ret = snd_soc_register_codec(&i2c->dev, 333f0fba2adSLiam Girdwood &soc_codec_dev_wm8728, &wm8728_dai, 1); 3341a9585b0SMark Brown 335f0fba2adSLiam Girdwood return ret; 336f0fba2adSLiam Girdwood } 337f0fba2adSLiam Girdwood 3387a79e94eSBill Pemberton static int wm8728_i2c_remove(struct i2c_client *client) 339f0fba2adSLiam Girdwood { 340f0fba2adSLiam Girdwood snd_soc_unregister_codec(&client->dev); 34171cfc902SMark Brown return 0; 34271cfc902SMark Brown } 34371cfc902SMark Brown 34471cfc902SMark Brown static const struct i2c_device_id wm8728_i2c_id[] = { 34571cfc902SMark Brown { "wm8728", 0 }, 34671cfc902SMark Brown { } 34771cfc902SMark Brown }; 34871cfc902SMark Brown MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id); 34971cfc902SMark Brown 35071cfc902SMark Brown static struct i2c_driver wm8728_i2c_driver = { 35171cfc902SMark Brown .driver = { 3520473e61bSMark Brown .name = "wm8728", 35371cfc902SMark Brown .owner = THIS_MODULE, 35445b4d043SMark Brown .of_match_table = wm8728_of_match, 35571cfc902SMark Brown }, 35671cfc902SMark Brown .probe = wm8728_i2c_probe, 3577a79e94eSBill Pemberton .remove = wm8728_i2c_remove, 35871cfc902SMark Brown .id_table = wm8728_i2c_id, 35971cfc902SMark Brown }; 36071cfc902SMark Brown #endif 36171cfc902SMark Brown 362c9b3a40fSTakashi Iwai static int __init wm8728_modinit(void) 36364089b84SMark Brown { 364f0fba2adSLiam Girdwood int ret = 0; 3655c153716SFabio Estevam #if IS_ENABLED(CONFIG_I2C) 366f0fba2adSLiam Girdwood ret = i2c_add_driver(&wm8728_i2c_driver); 367f0fba2adSLiam Girdwood if (ret != 0) { 368f0fba2adSLiam Girdwood printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n", 369f0fba2adSLiam Girdwood ret); 370f0fba2adSLiam Girdwood } 371f0fba2adSLiam Girdwood #endif 372f0fba2adSLiam Girdwood #if defined(CONFIG_SPI_MASTER) 373f0fba2adSLiam Girdwood ret = spi_register_driver(&wm8728_spi_driver); 374f0fba2adSLiam Girdwood if (ret != 0) { 375f0fba2adSLiam Girdwood printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n", 376f0fba2adSLiam Girdwood ret); 377f0fba2adSLiam Girdwood } 378f0fba2adSLiam Girdwood #endif 379f0fba2adSLiam Girdwood return ret; 38064089b84SMark Brown } 38164089b84SMark Brown module_init(wm8728_modinit); 38264089b84SMark Brown 38364089b84SMark Brown static void __exit wm8728_exit(void) 38464089b84SMark Brown { 3855c153716SFabio Estevam #if IS_ENABLED(CONFIG_I2C) 386f0fba2adSLiam Girdwood i2c_del_driver(&wm8728_i2c_driver); 387f0fba2adSLiam Girdwood #endif 388f0fba2adSLiam Girdwood #if defined(CONFIG_SPI_MASTER) 389f0fba2adSLiam Girdwood spi_unregister_driver(&wm8728_spi_driver); 390f0fba2adSLiam Girdwood #endif 39164089b84SMark Brown } 39264089b84SMark Brown module_exit(wm8728_exit); 39364089b84SMark Brown 39471cfc902SMark Brown MODULE_DESCRIPTION("ASoC WM8728 driver"); 39571cfc902SMark Brown MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 39671cfc902SMark Brown MODULE_LICENSE("GPL"); 397