1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 271cfc902SMark Brown /* 371cfc902SMark Brown * wm8728.c -- WM8728 ALSA SoC Audio driver 471cfc902SMark Brown * 571cfc902SMark Brown * Copyright 2008 Wolfson Microelectronics plc 671cfc902SMark Brown * 771cfc902SMark Brown * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 871cfc902SMark Brown */ 971cfc902SMark Brown 1071cfc902SMark Brown #include <linux/module.h> 1171cfc902SMark Brown #include <linux/moduleparam.h> 1271cfc902SMark Brown #include <linux/init.h> 1371cfc902SMark Brown #include <linux/delay.h> 1471cfc902SMark Brown #include <linux/pm.h> 1571cfc902SMark Brown #include <linux/i2c.h> 1671cfc902SMark Brown #include <linux/platform_device.h> 17d16383efSMark Brown #include <linux/regmap.h> 1871cfc902SMark Brown #include <linux/spi/spi.h> 195a0e3ad6STejun Heo #include <linux/slab.h> 2045b4d043SMark Brown #include <linux/of_device.h> 2171cfc902SMark Brown #include <sound/core.h> 2271cfc902SMark Brown #include <sound/pcm.h> 2371cfc902SMark Brown #include <sound/pcm_params.h> 2471cfc902SMark Brown #include <sound/soc.h> 2571cfc902SMark Brown #include <sound/initval.h> 2671cfc902SMark Brown #include <sound/tlv.h> 2771cfc902SMark Brown 2871cfc902SMark Brown #include "wm8728.h" 2971cfc902SMark Brown 3071cfc902SMark Brown /* 3171cfc902SMark Brown * We can't read the WM8728 register space so we cache them instead. 3271cfc902SMark Brown * Note that the defaults here aren't the physical defaults, we latch 3371cfc902SMark Brown * the volume update bits, mute the output and enable infinite zero 3471cfc902SMark Brown * detect. 3571cfc902SMark Brown */ 36d16383efSMark Brown static const struct reg_default wm8728_reg_defaults[] = { 37d16383efSMark Brown { 0, 0x1ff }, 38d16383efSMark Brown { 1, 0x1ff }, 39d16383efSMark Brown { 2, 0x001 }, 40d16383efSMark Brown { 3, 0x100 }, 4171cfc902SMark Brown }; 4271cfc902SMark Brown 43f0fba2adSLiam Girdwood /* codec private data */ 44f0fba2adSLiam Girdwood struct wm8728_priv { 45d16383efSMark Brown struct regmap *regmap; 46f0fba2adSLiam Girdwood }; 47f0fba2adSLiam Girdwood 4871cfc902SMark Brown static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1); 4971cfc902SMark Brown 5071cfc902SMark Brown static const struct snd_kcontrol_new wm8728_snd_controls[] = { 5171cfc902SMark Brown 5271cfc902SMark Brown SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL, 5371cfc902SMark Brown 0, 255, 0, wm8728_tlv), 5471cfc902SMark Brown 5571cfc902SMark Brown SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0), 5671cfc902SMark Brown }; 5771cfc902SMark Brown 5871cfc902SMark Brown /* 5971cfc902SMark Brown * DAPM controls. 6071cfc902SMark Brown */ 6171cfc902SMark Brown static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = { 6271cfc902SMark Brown SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0), 6371cfc902SMark Brown SND_SOC_DAPM_OUTPUT("VOUTL"), 6471cfc902SMark Brown SND_SOC_DAPM_OUTPUT("VOUTR"), 6571cfc902SMark Brown }; 6671cfc902SMark Brown 678428edf9SLu Guanqun static const struct snd_soc_dapm_route wm8728_intercon[] = { 6871cfc902SMark Brown {"VOUTL", NULL, "DAC"}, 6971cfc902SMark Brown {"VOUTR", NULL, "DAC"}, 7071cfc902SMark Brown }; 7171cfc902SMark Brown 7271cfc902SMark Brown static int wm8728_mute(struct snd_soc_dai *dai, int mute) 7371cfc902SMark Brown { 746b413080SKuninori Morimoto struct snd_soc_component *component = dai->component; 756b413080SKuninori Morimoto u16 mute_reg = snd_soc_component_read32(component, WM8728_DACCTL); 7671cfc902SMark Brown 7771cfc902SMark Brown if (mute) 786b413080SKuninori Morimoto snd_soc_component_write(component, WM8728_DACCTL, mute_reg | 1); 7971cfc902SMark Brown else 806b413080SKuninori Morimoto snd_soc_component_write(component, WM8728_DACCTL, mute_reg & ~1); 8171cfc902SMark Brown 8271cfc902SMark Brown return 0; 8371cfc902SMark Brown } 8471cfc902SMark Brown 8571cfc902SMark Brown static int wm8728_hw_params(struct snd_pcm_substream *substream, 86dee89c4dSMark Brown struct snd_pcm_hw_params *params, 87dee89c4dSMark Brown struct snd_soc_dai *dai) 8871cfc902SMark Brown { 896b413080SKuninori Morimoto struct snd_soc_component *component = dai->component; 906b413080SKuninori Morimoto u16 dac = snd_soc_component_read32(component, WM8728_DACCTL); 9171cfc902SMark Brown 9271cfc902SMark Brown dac &= ~0x18; 9371cfc902SMark Brown 949fbad31aSMark Brown switch (params_width(params)) { 959fbad31aSMark Brown case 16: 9671cfc902SMark Brown break; 979fbad31aSMark Brown case 20: 9871cfc902SMark Brown dac |= 0x10; 9971cfc902SMark Brown break; 1009fbad31aSMark Brown case 24: 10171cfc902SMark Brown dac |= 0x08; 10271cfc902SMark Brown break; 10371cfc902SMark Brown default: 10471cfc902SMark Brown return -EINVAL; 10571cfc902SMark Brown } 10671cfc902SMark Brown 1076b413080SKuninori Morimoto snd_soc_component_write(component, WM8728_DACCTL, dac); 10871cfc902SMark Brown 10971cfc902SMark Brown return 0; 11071cfc902SMark Brown } 11171cfc902SMark Brown 11271cfc902SMark Brown static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai, 11371cfc902SMark Brown unsigned int fmt) 11471cfc902SMark Brown { 1156b413080SKuninori Morimoto struct snd_soc_component *component = codec_dai->component; 1166b413080SKuninori Morimoto u16 iface = snd_soc_component_read32(component, WM8728_IFCTL); 11771cfc902SMark Brown 11871cfc902SMark Brown /* Currently only I2S is supported by the driver, though the 11971cfc902SMark Brown * hardware is more flexible. 12071cfc902SMark Brown */ 12171cfc902SMark Brown switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 12271cfc902SMark Brown case SND_SOC_DAIFMT_I2S: 12371cfc902SMark Brown iface |= 1; 12471cfc902SMark Brown break; 12571cfc902SMark Brown default: 12671cfc902SMark Brown return -EINVAL; 12771cfc902SMark Brown } 12871cfc902SMark Brown 12971cfc902SMark Brown /* The hardware only support full slave mode */ 13071cfc902SMark Brown switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 13171cfc902SMark Brown case SND_SOC_DAIFMT_CBS_CFS: 13271cfc902SMark Brown break; 13371cfc902SMark Brown default: 13471cfc902SMark Brown return -EINVAL; 13571cfc902SMark Brown } 13671cfc902SMark Brown 13771cfc902SMark Brown switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 13871cfc902SMark Brown case SND_SOC_DAIFMT_NB_NF: 13971cfc902SMark Brown iface &= ~0x22; 14071cfc902SMark Brown break; 14171cfc902SMark Brown case SND_SOC_DAIFMT_IB_NF: 14271cfc902SMark Brown iface |= 0x20; 14371cfc902SMark Brown iface &= ~0x02; 14471cfc902SMark Brown break; 14571cfc902SMark Brown case SND_SOC_DAIFMT_NB_IF: 14671cfc902SMark Brown iface |= 0x02; 14771cfc902SMark Brown iface &= ~0x20; 14871cfc902SMark Brown break; 14971cfc902SMark Brown case SND_SOC_DAIFMT_IB_IF: 15071cfc902SMark Brown iface |= 0x22; 15171cfc902SMark Brown break; 15271cfc902SMark Brown default: 15371cfc902SMark Brown return -EINVAL; 15471cfc902SMark Brown } 15571cfc902SMark Brown 1566b413080SKuninori Morimoto snd_soc_component_write(component, WM8728_IFCTL, iface); 15771cfc902SMark Brown return 0; 15871cfc902SMark Brown } 15971cfc902SMark Brown 1606b413080SKuninori Morimoto static int wm8728_set_bias_level(struct snd_soc_component *component, 16171cfc902SMark Brown enum snd_soc_bias_level level) 16271cfc902SMark Brown { 1636b413080SKuninori Morimoto struct wm8728_priv *wm8728 = snd_soc_component_get_drvdata(component); 16471cfc902SMark Brown u16 reg; 16571cfc902SMark Brown 16671cfc902SMark Brown switch (level) { 16771cfc902SMark Brown case SND_SOC_BIAS_ON: 16871cfc902SMark Brown case SND_SOC_BIAS_PREPARE: 16971cfc902SMark Brown case SND_SOC_BIAS_STANDBY: 1706b413080SKuninori Morimoto if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) { 17171cfc902SMark Brown /* Power everything up... */ 1726b413080SKuninori Morimoto reg = snd_soc_component_read32(component, WM8728_DACCTL); 1736b413080SKuninori Morimoto snd_soc_component_write(component, WM8728_DACCTL, reg & ~0x4); 17471cfc902SMark Brown 17571cfc902SMark Brown /* ..then sync in the register cache. */ 176d16383efSMark Brown regcache_sync(wm8728->regmap); 17771cfc902SMark Brown } 17871cfc902SMark Brown break; 17971cfc902SMark Brown 18071cfc902SMark Brown case SND_SOC_BIAS_OFF: 1816b413080SKuninori Morimoto reg = snd_soc_component_read32(component, WM8728_DACCTL); 1826b413080SKuninori Morimoto snd_soc_component_write(component, WM8728_DACCTL, reg | 0x4); 18371cfc902SMark Brown break; 18471cfc902SMark Brown } 18571cfc902SMark Brown return 0; 18671cfc902SMark Brown } 18771cfc902SMark Brown 18871cfc902SMark Brown #define WM8728_RATES (SNDRV_PCM_RATE_8000_192000) 18971cfc902SMark Brown 19071cfc902SMark Brown #define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 19171cfc902SMark Brown SNDRV_PCM_FMTBIT_S24_LE) 19271cfc902SMark Brown 19385e7652dSLars-Peter Clausen static const struct snd_soc_dai_ops wm8728_dai_ops = { 1946335d055SEric Miao .hw_params = wm8728_hw_params, 1956335d055SEric Miao .digital_mute = wm8728_mute, 1966335d055SEric Miao .set_fmt = wm8728_set_dai_fmt, 1976335d055SEric Miao }; 1986335d055SEric Miao 199f0fba2adSLiam Girdwood static struct snd_soc_dai_driver wm8728_dai = { 200f0fba2adSLiam Girdwood .name = "wm8728-hifi", 20171cfc902SMark Brown .playback = { 20271cfc902SMark Brown .stream_name = "Playback", 20371cfc902SMark Brown .channels_min = 2, 20471cfc902SMark Brown .channels_max = 2, 20571cfc902SMark Brown .rates = WM8728_RATES, 20671cfc902SMark Brown .formats = WM8728_FORMATS, 20771cfc902SMark Brown }, 2086335d055SEric Miao .ops = &wm8728_dai_ops, 20971cfc902SMark Brown }; 21071cfc902SMark Brown 2116b413080SKuninori Morimoto static const struct snd_soc_component_driver soc_component_dev_wm8728 = { 212f0fba2adSLiam Girdwood .set_bias_level = wm8728_set_bias_level, 213e41d5a3bSMark Brown .controls = wm8728_snd_controls, 214e41d5a3bSMark Brown .num_controls = ARRAY_SIZE(wm8728_snd_controls), 2158428edf9SLu Guanqun .dapm_widgets = wm8728_dapm_widgets, 2168428edf9SLu Guanqun .num_dapm_widgets = ARRAY_SIZE(wm8728_dapm_widgets), 2178428edf9SLu Guanqun .dapm_routes = wm8728_intercon, 2188428edf9SLu Guanqun .num_dapm_routes = ARRAY_SIZE(wm8728_intercon), 2196b413080SKuninori Morimoto .suspend_bias_off = 1, 2206b413080SKuninori Morimoto .idle_bias_on = 1, 2216b413080SKuninori Morimoto .use_pmdown_time = 1, 2226b413080SKuninori Morimoto .endianness = 1, 2236b413080SKuninori Morimoto .non_legacy_dai_naming = 1, 224f0fba2adSLiam Girdwood }; 225f0fba2adSLiam Girdwood 22645b4d043SMark Brown static const struct of_device_id wm8728_of_match[] = { 22745b4d043SMark Brown { .compatible = "wlf,wm8728", }, 22845b4d043SMark Brown { } 22945b4d043SMark Brown }; 23045b4d043SMark Brown MODULE_DEVICE_TABLE(of, wm8728_of_match); 23145b4d043SMark Brown 232d16383efSMark Brown static const struct regmap_config wm8728_regmap = { 233d16383efSMark Brown .reg_bits = 7, 234d16383efSMark Brown .val_bits = 9, 235d16383efSMark Brown .max_register = WM8728_IFCTL, 236d16383efSMark Brown 237d16383efSMark Brown .reg_defaults = wm8728_reg_defaults, 238d16383efSMark Brown .num_reg_defaults = ARRAY_SIZE(wm8728_reg_defaults), 239d16383efSMark Brown .cache_type = REGCACHE_RBTREE, 240d16383efSMark Brown }; 241d16383efSMark Brown 242f0fba2adSLiam Girdwood #if defined(CONFIG_SPI_MASTER) 2437a79e94eSBill Pemberton static int wm8728_spi_probe(struct spi_device *spi) 244f0fba2adSLiam Girdwood { 245f0fba2adSLiam Girdwood struct wm8728_priv *wm8728; 24671cfc902SMark Brown int ret; 24771cfc902SMark Brown 2481a9585b0SMark Brown wm8728 = devm_kzalloc(&spi->dev, sizeof(struct wm8728_priv), 2491a9585b0SMark Brown GFP_KERNEL); 250f0fba2adSLiam Girdwood if (wm8728 == NULL) 251f0fba2adSLiam Girdwood return -ENOMEM; 25271cfc902SMark Brown 253d16383efSMark Brown wm8728->regmap = devm_regmap_init_spi(spi, &wm8728_regmap); 254d16383efSMark Brown if (IS_ERR(wm8728->regmap)) 255d16383efSMark Brown return PTR_ERR(wm8728->regmap); 256d16383efSMark Brown 257f0fba2adSLiam Girdwood spi_set_drvdata(spi, wm8728); 258f0fba2adSLiam Girdwood 2596b413080SKuninori Morimoto ret = devm_snd_soc_register_component(&spi->dev, 2606b413080SKuninori Morimoto &soc_component_dev_wm8728, &wm8728_dai, 1); 2611a9585b0SMark Brown 26271cfc902SMark Brown return ret; 26371cfc902SMark Brown } 26471cfc902SMark Brown 265f0fba2adSLiam Girdwood static struct spi_driver wm8728_spi_driver = { 266f0fba2adSLiam Girdwood .driver = { 2670473e61bSMark Brown .name = "wm8728", 26845b4d043SMark Brown .of_match_table = wm8728_of_match, 269f0fba2adSLiam Girdwood }, 270f0fba2adSLiam Girdwood .probe = wm8728_spi_probe, 271f0fba2adSLiam Girdwood }; 272f0fba2adSLiam Girdwood #endif /* CONFIG_SPI_MASTER */ 273f0fba2adSLiam Girdwood 2745c153716SFabio Estevam #if IS_ENABLED(CONFIG_I2C) 2757a79e94eSBill Pemberton static int wm8728_i2c_probe(struct i2c_client *i2c, 276f0fba2adSLiam Girdwood const struct i2c_device_id *id) 277f0fba2adSLiam Girdwood { 278f0fba2adSLiam Girdwood struct wm8728_priv *wm8728; 279f0fba2adSLiam Girdwood int ret; 280f0fba2adSLiam Girdwood 2811a9585b0SMark Brown wm8728 = devm_kzalloc(&i2c->dev, sizeof(struct wm8728_priv), 2821a9585b0SMark Brown GFP_KERNEL); 283f0fba2adSLiam Girdwood if (wm8728 == NULL) 284f0fba2adSLiam Girdwood return -ENOMEM; 285f0fba2adSLiam Girdwood 286d16383efSMark Brown wm8728->regmap = devm_regmap_init_i2c(i2c, &wm8728_regmap); 287d16383efSMark Brown if (IS_ERR(wm8728->regmap)) 288d16383efSMark Brown return PTR_ERR(wm8728->regmap); 289d16383efSMark Brown 290f0fba2adSLiam Girdwood i2c_set_clientdata(i2c, wm8728); 291f0fba2adSLiam Girdwood 2926b413080SKuninori Morimoto ret = devm_snd_soc_register_component(&i2c->dev, 2936b413080SKuninori Morimoto &soc_component_dev_wm8728, &wm8728_dai, 1); 2941a9585b0SMark Brown 295f0fba2adSLiam Girdwood return ret; 296f0fba2adSLiam Girdwood } 297f0fba2adSLiam Girdwood 29871cfc902SMark Brown static const struct i2c_device_id wm8728_i2c_id[] = { 29971cfc902SMark Brown { "wm8728", 0 }, 30071cfc902SMark Brown { } 30171cfc902SMark Brown }; 30271cfc902SMark Brown MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id); 30371cfc902SMark Brown 30471cfc902SMark Brown static struct i2c_driver wm8728_i2c_driver = { 30571cfc902SMark Brown .driver = { 3060473e61bSMark Brown .name = "wm8728", 30745b4d043SMark Brown .of_match_table = wm8728_of_match, 30871cfc902SMark Brown }, 30971cfc902SMark Brown .probe = wm8728_i2c_probe, 31071cfc902SMark Brown .id_table = wm8728_i2c_id, 31171cfc902SMark Brown }; 31271cfc902SMark Brown #endif 31371cfc902SMark Brown 314c9b3a40fSTakashi Iwai static int __init wm8728_modinit(void) 31564089b84SMark Brown { 316f0fba2adSLiam Girdwood int ret = 0; 3175c153716SFabio Estevam #if IS_ENABLED(CONFIG_I2C) 318f0fba2adSLiam Girdwood ret = i2c_add_driver(&wm8728_i2c_driver); 319f0fba2adSLiam Girdwood if (ret != 0) { 320f0fba2adSLiam Girdwood printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n", 321f0fba2adSLiam Girdwood ret); 322f0fba2adSLiam Girdwood } 323f0fba2adSLiam Girdwood #endif 324f0fba2adSLiam Girdwood #if defined(CONFIG_SPI_MASTER) 325f0fba2adSLiam Girdwood ret = spi_register_driver(&wm8728_spi_driver); 326f0fba2adSLiam Girdwood if (ret != 0) { 327f0fba2adSLiam Girdwood printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n", 328f0fba2adSLiam Girdwood ret); 329f0fba2adSLiam Girdwood } 330f0fba2adSLiam Girdwood #endif 331f0fba2adSLiam Girdwood return ret; 33264089b84SMark Brown } 33364089b84SMark Brown module_init(wm8728_modinit); 33464089b84SMark Brown 33564089b84SMark Brown static void __exit wm8728_exit(void) 33664089b84SMark Brown { 3375c153716SFabio Estevam #if IS_ENABLED(CONFIG_I2C) 338f0fba2adSLiam Girdwood i2c_del_driver(&wm8728_i2c_driver); 339f0fba2adSLiam Girdwood #endif 340f0fba2adSLiam Girdwood #if defined(CONFIG_SPI_MASTER) 341f0fba2adSLiam Girdwood spi_unregister_driver(&wm8728_spi_driver); 342f0fba2adSLiam Girdwood #endif 34364089b84SMark Brown } 34464089b84SMark Brown module_exit(wm8728_exit); 34564089b84SMark Brown 34671cfc902SMark Brown MODULE_DESCRIPTION("ASoC WM8728 driver"); 34771cfc902SMark Brown MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 34871cfc902SMark Brown MODULE_LICENSE("GPL"); 349