/* * wm8728.c -- WM8728 ALSA SoC Audio driver * * Copyright 2008 Wolfson Microelectronics plc * * Author: Mark Brown * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "wm8728.h" /* * We can't read the WM8728 register space so we cache them instead. * Note that the defaults here aren't the physical defaults, we latch * the volume update bits, mute the output and enable infinite zero * detect. */ static const struct reg_default wm8728_reg_defaults[] = { { 0, 0x1ff }, { 1, 0x1ff }, { 2, 0x001 }, { 3, 0x100 }, }; /* codec private data */ struct wm8728_priv { struct regmap *regmap; }; static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1); static const struct snd_kcontrol_new wm8728_snd_controls[] = { SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL, 0, 255, 0, wm8728_tlv), SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0), }; /* * DAPM controls. */ static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = { SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_OUTPUT("VOUTL"), SND_SOC_DAPM_OUTPUT("VOUTR"), }; static const struct snd_soc_dapm_route wm8728_intercon[] = { {"VOUTL", NULL, "DAC"}, {"VOUTR", NULL, "DAC"}, }; static int wm8728_mute(struct snd_soc_dai *dai, int mute) { struct snd_soc_codec *codec = dai->codec; u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL); if (mute) snd_soc_write(codec, WM8728_DACCTL, mute_reg | 1); else snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1); return 0; } static int wm8728_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { struct snd_soc_codec *codec = dai->codec; u16 dac = snd_soc_read(codec, WM8728_DACCTL); dac &= ~0x18; switch (params_width(params)) { case 16: break; case 20: dac |= 0x10; break; case 24: dac |= 0x08; break; default: return -EINVAL; } snd_soc_write(codec, WM8728_DACCTL, dac); return 0; } static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) { struct snd_soc_codec *codec = codec_dai->codec; u16 iface = snd_soc_read(codec, WM8728_IFCTL); /* Currently only I2S is supported by the driver, though the * hardware is more flexible. */ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: iface |= 1; break; default: return -EINVAL; } /* The hardware only support full slave mode */ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBS_CFS: break; default: return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: iface &= ~0x22; break; case SND_SOC_DAIFMT_IB_NF: iface |= 0x20; iface &= ~0x02; break; case SND_SOC_DAIFMT_NB_IF: iface |= 0x02; iface &= ~0x20; break; case SND_SOC_DAIFMT_IB_IF: iface |= 0x22; break; default: return -EINVAL; } snd_soc_write(codec, WM8728_IFCTL, iface); return 0; } static int wm8728_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { struct wm8728_priv *wm8728 = snd_soc_codec_get_drvdata(codec); u16 reg; switch (level) { case SND_SOC_BIAS_ON: case SND_SOC_BIAS_PREPARE: case SND_SOC_BIAS_STANDBY: if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { /* Power everything up... */ reg = snd_soc_read(codec, WM8728_DACCTL); snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4); /* ..then sync in the register cache. */ regcache_sync(wm8728->regmap); } break; case SND_SOC_BIAS_OFF: reg = snd_soc_read(codec, WM8728_DACCTL); snd_soc_write(codec, WM8728_DACCTL, reg | 0x4); break; } return 0; } #define WM8728_RATES (SNDRV_PCM_RATE_8000_192000) #define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ SNDRV_PCM_FMTBIT_S24_LE) static const struct snd_soc_dai_ops wm8728_dai_ops = { .hw_params = wm8728_hw_params, .digital_mute = wm8728_mute, .set_fmt = wm8728_set_dai_fmt, }; static struct snd_soc_dai_driver wm8728_dai = { .name = "wm8728-hifi", .playback = { .stream_name = "Playback", .channels_min = 2, .channels_max = 2, .rates = WM8728_RATES, .formats = WM8728_FORMATS, }, .ops = &wm8728_dai_ops, }; static struct snd_soc_codec_driver soc_codec_dev_wm8728 = { .set_bias_level = wm8728_set_bias_level, .suspend_bias_off = true, .controls = wm8728_snd_controls, .num_controls = ARRAY_SIZE(wm8728_snd_controls), .dapm_widgets = wm8728_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(wm8728_dapm_widgets), .dapm_routes = wm8728_intercon, .num_dapm_routes = ARRAY_SIZE(wm8728_intercon), }; static const struct of_device_id wm8728_of_match[] = { { .compatible = "wlf,wm8728", }, { } }; MODULE_DEVICE_TABLE(of, wm8728_of_match); static const struct regmap_config wm8728_regmap = { .reg_bits = 7, .val_bits = 9, .max_register = WM8728_IFCTL, .reg_defaults = wm8728_reg_defaults, .num_reg_defaults = ARRAY_SIZE(wm8728_reg_defaults), .cache_type = REGCACHE_RBTREE, }; #if defined(CONFIG_SPI_MASTER) static int wm8728_spi_probe(struct spi_device *spi) { struct wm8728_priv *wm8728; int ret; wm8728 = devm_kzalloc(&spi->dev, sizeof(struct wm8728_priv), GFP_KERNEL); if (wm8728 == NULL) return -ENOMEM; wm8728->regmap = devm_regmap_init_spi(spi, &wm8728_regmap); if (IS_ERR(wm8728->regmap)) return PTR_ERR(wm8728->regmap); spi_set_drvdata(spi, wm8728); ret = snd_soc_register_codec(&spi->dev, &soc_codec_dev_wm8728, &wm8728_dai, 1); return ret; } static int wm8728_spi_remove(struct spi_device *spi) { snd_soc_unregister_codec(&spi->dev); return 0; } static struct spi_driver wm8728_spi_driver = { .driver = { .name = "wm8728", .owner = THIS_MODULE, .of_match_table = wm8728_of_match, }, .probe = wm8728_spi_probe, .remove = wm8728_spi_remove, }; #endif /* CONFIG_SPI_MASTER */ #if IS_ENABLED(CONFIG_I2C) static int wm8728_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct wm8728_priv *wm8728; int ret; wm8728 = devm_kzalloc(&i2c->dev, sizeof(struct wm8728_priv), GFP_KERNEL); if (wm8728 == NULL) return -ENOMEM; wm8728->regmap = devm_regmap_init_i2c(i2c, &wm8728_regmap); if (IS_ERR(wm8728->regmap)) return PTR_ERR(wm8728->regmap); i2c_set_clientdata(i2c, wm8728); ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm8728, &wm8728_dai, 1); return ret; } static int wm8728_i2c_remove(struct i2c_client *client) { snd_soc_unregister_codec(&client->dev); return 0; } static const struct i2c_device_id wm8728_i2c_id[] = { { "wm8728", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id); static struct i2c_driver wm8728_i2c_driver = { .driver = { .name = "wm8728", .owner = THIS_MODULE, .of_match_table = wm8728_of_match, }, .probe = wm8728_i2c_probe, .remove = wm8728_i2c_remove, .id_table = wm8728_i2c_id, }; #endif static int __init wm8728_modinit(void) { int ret = 0; #if IS_ENABLED(CONFIG_I2C) ret = i2c_add_driver(&wm8728_i2c_driver); if (ret != 0) { printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n", ret); } #endif #if defined(CONFIG_SPI_MASTER) ret = spi_register_driver(&wm8728_spi_driver); if (ret != 0) { printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n", ret); } #endif return ret; } module_init(wm8728_modinit); static void __exit wm8728_exit(void) { #if IS_ENABLED(CONFIG_I2C) i2c_del_driver(&wm8728_i2c_driver); #endif #if defined(CONFIG_SPI_MASTER) spi_unregister_driver(&wm8728_spi_driver); #endif } module_exit(wm8728_exit); MODULE_DESCRIPTION("ASoC WM8728 driver"); MODULE_AUTHOR("Mark Brown "); MODULE_LICENSE("GPL");