/* * wm8776.c -- WM8776 ALSA SoC Audio driver * * Copyright 2009-12 Wolfson Microelectronics plc * * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> * * 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. * * TODO: Input ALC/limiter support */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/pm.h> #include <linux/i2c.h> #include <linux/of_device.h> #include <linux/regmap.h> #include <linux/spi/spi.h> #include <linux/slab.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/soc.h> #include <sound/initval.h> #include <sound/tlv.h> #include "wm8776.h" enum wm8776_chip_type { WM8775 = 1, WM8776, }; /* codec private data */ struct wm8776_priv { struct regmap *regmap; int sysclk[2]; }; static const struct reg_default wm8776_reg_defaults[] = { { 0, 0x79 }, { 1, 0x79 }, { 2, 0x79 }, { 3, 0xff }, { 4, 0xff }, { 5, 0xff }, { 6, 0x00 }, { 7, 0x90 }, { 8, 0x00 }, { 9, 0x00 }, { 10, 0x22 }, { 11, 0x22 }, { 12, 0x22 }, { 13, 0x08 }, { 14, 0xcf }, { 15, 0xcf }, { 16, 0x7b }, { 17, 0x00 }, { 18, 0x32 }, { 19, 0x00 }, { 20, 0xa6 }, { 21, 0x01 }, { 22, 0x01 }, }; static bool wm8776_volatile(struct device *dev, unsigned int reg) { switch (reg) { case WM8776_RESET: return true; default: return false; } } static int wm8776_reset(struct snd_soc_codec *codec) { return snd_soc_write(codec, WM8776_RESET, 0); } static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1); static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1); static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1); static const struct snd_kcontrol_new wm8776_snd_controls[] = { SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL, 0, 127, 0, hp_tlv), SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL, 0, 255, 0, dac_tlv), SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0), SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0), SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL, 0, 255, 0, adc_tlv), SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1), SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0), SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1), }; static const struct snd_kcontrol_new inmix_controls[] = { SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0), SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0), SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0), SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0), SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0), }; static const struct snd_kcontrol_new outmix_controls[] = { SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0), SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0), SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0), }; static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = { SND_SOC_DAPM_INPUT("AUX"), SND_SOC_DAPM_INPUT("AIN1"), SND_SOC_DAPM_INPUT("AIN2"), SND_SOC_DAPM_INPUT("AIN3"), SND_SOC_DAPM_INPUT("AIN4"), SND_SOC_DAPM_INPUT("AIN5"), SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1, inmix_controls, ARRAY_SIZE(inmix_controls)), SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1), SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1), SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0, outmix_controls, ARRAY_SIZE(outmix_controls)), SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0), SND_SOC_DAPM_OUTPUT("VOUT"), SND_SOC_DAPM_OUTPUT("HPOUTL"), SND_SOC_DAPM_OUTPUT("HPOUTR"), }; static const struct snd_soc_dapm_route routes[] = { { "Input Mixer", "AIN1 Switch", "AIN1" }, { "Input Mixer", "AIN2 Switch", "AIN2" }, { "Input Mixer", "AIN3 Switch", "AIN3" }, { "Input Mixer", "AIN4 Switch", "AIN4" }, { "Input Mixer", "AIN5 Switch", "AIN5" }, { "ADC", NULL, "Input Mixer" }, { "Output Mixer", "DAC Switch", "DAC" }, { "Output Mixer", "AUX Switch", "AUX" }, { "Output Mixer", "Bypass Switch", "Input Mixer" }, { "VOUT", NULL, "Output Mixer" }, { "Headphone PGA", NULL, "Output Mixer" }, { "HPOUTL", NULL, "Headphone PGA" }, { "HPOUTR", NULL, "Headphone PGA" }, }; static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) { struct snd_soc_codec *codec = dai->codec; int reg, iface, master; switch (dai->driver->id) { case WM8776_DAI_DAC: reg = WM8776_DACIFCTRL; master = 0x80; break; case WM8776_DAI_ADC: reg = WM8776_ADCIFCTRL; master = 0x100; break; default: return -EINVAL; } iface = 0; switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBM_CFM: break; case SND_SOC_DAIFMT_CBS_CFS: master = 0; break; default: return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: iface |= 0x0002; break; case SND_SOC_DAIFMT_RIGHT_J: break; case SND_SOC_DAIFMT_LEFT_J: iface |= 0x0001; break; default: return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: break; case SND_SOC_DAIFMT_IB_IF: iface |= 0x00c; break; case SND_SOC_DAIFMT_IB_NF: iface |= 0x008; break; case SND_SOC_DAIFMT_NB_IF: iface |= 0x004; break; default: return -EINVAL; } /* Finally, write out the values */ snd_soc_update_bits(codec, reg, 0xf, iface); snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master); return 0; } static int mclk_ratios[] = { 128, 192, 256, 384, 512, 768, }; static int wm8776_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; struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); int iface_reg, iface; int ratio_shift, master; int i; switch (dai->driver->id) { case WM8776_DAI_DAC: iface_reg = WM8776_DACIFCTRL; master = 0x80; ratio_shift = 4; break; case WM8776_DAI_ADC: iface_reg = WM8776_ADCIFCTRL; master = 0x100; ratio_shift = 0; break; default: return -EINVAL; } /* Set word length */ switch (params_width(params)) { case 16: iface = 0; break; case 20: iface = 0x10; break; case 24: iface = 0x20; break; case 32: iface = 0x30; break; default: dev_err(codec->dev, "Unsupported sample size: %i\n", params_width(params)); return -EINVAL; } /* Only need to set MCLK/LRCLK ratio if we're master */ if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) { for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) { if (wm8776->sysclk[dai->driver->id] / params_rate(params) == mclk_ratios[i]) break; } if (i == ARRAY_SIZE(mclk_ratios)) { dev_err(codec->dev, "Unable to configure MCLK ratio %d/%d\n", wm8776->sysclk[dai->driver->id], params_rate(params)); return -EINVAL; } dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]); snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x7 << ratio_shift, i << ratio_shift); } else { dev_dbg(codec->dev, "DAI in slave mode\n"); } snd_soc_update_bits(codec, iface_reg, 0x30, iface); return 0; } static int wm8776_mute(struct snd_soc_dai *dai, int mute) { struct snd_soc_codec *codec = dai->codec; return snd_soc_write(codec, WM8776_DACMUTE, !!mute); } static int wm8776_set_sysclk(struct snd_soc_dai *dai, int clk_id, unsigned int freq, int dir) { struct snd_soc_codec *codec = dai->codec; struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); if (WARN_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk))) return -EINVAL; wm8776->sysclk[dai->driver->id] = freq; return 0; } static int wm8776_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); switch (level) { case SND_SOC_BIAS_ON: break; case SND_SOC_BIAS_PREPARE: break; case SND_SOC_BIAS_STANDBY: if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) { regcache_sync(wm8776->regmap); /* Disable the global powerdown; DAPM does the rest */ snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0); } break; case SND_SOC_BIAS_OFF: snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1); break; } return 0; } #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) static const struct snd_soc_dai_ops wm8776_dac_ops = { .digital_mute = wm8776_mute, .hw_params = wm8776_hw_params, .set_fmt = wm8776_set_fmt, .set_sysclk = wm8776_set_sysclk, }; static const struct snd_soc_dai_ops wm8776_adc_ops = { .hw_params = wm8776_hw_params, .set_fmt = wm8776_set_fmt, .set_sysclk = wm8776_set_sysclk, }; static struct snd_soc_dai_driver wm8776_dai[] = { { .name = "wm8776-hifi-playback", .id = WM8776_DAI_DAC, .playback = { .stream_name = "Playback", .channels_min = 2, .channels_max = 2, .rates = SNDRV_PCM_RATE_CONTINUOUS, .rate_min = 32000, .rate_max = 192000, .formats = WM8776_FORMATS, }, .ops = &wm8776_dac_ops, }, { .name = "wm8776-hifi-capture", .id = WM8776_DAI_ADC, .capture = { .stream_name = "Capture", .channels_min = 2, .channels_max = 2, .rates = SNDRV_PCM_RATE_CONTINUOUS, .rate_min = 32000, .rate_max = 96000, .formats = WM8776_FORMATS, }, .ops = &wm8776_adc_ops, }, }; static int wm8776_probe(struct snd_soc_codec *codec) { int ret = 0; ret = wm8776_reset(codec); if (ret < 0) { dev_err(codec->dev, "Failed to issue reset: %d\n", ret); return ret; } /* Latch the update bits; right channel only since we always * update both. */ snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100); snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100); return ret; } static const struct snd_soc_codec_driver soc_codec_dev_wm8776 = { .probe = wm8776_probe, .set_bias_level = wm8776_set_bias_level, .suspend_bias_off = true, .component_driver = { .controls = wm8776_snd_controls, .num_controls = ARRAY_SIZE(wm8776_snd_controls), .dapm_widgets = wm8776_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(wm8776_dapm_widgets), .dapm_routes = routes, .num_dapm_routes = ARRAY_SIZE(routes), }, }; static const struct of_device_id wm8776_of_match[] = { { .compatible = "wlf,wm8776", }, { } }; MODULE_DEVICE_TABLE(of, wm8776_of_match); static const struct regmap_config wm8776_regmap = { .reg_bits = 7, .val_bits = 9, .max_register = WM8776_RESET, .reg_defaults = wm8776_reg_defaults, .num_reg_defaults = ARRAY_SIZE(wm8776_reg_defaults), .cache_type = REGCACHE_RBTREE, .volatile_reg = wm8776_volatile, }; #if defined(CONFIG_SPI_MASTER) static int wm8776_spi_probe(struct spi_device *spi) { struct wm8776_priv *wm8776; int ret; wm8776 = devm_kzalloc(&spi->dev, sizeof(struct wm8776_priv), GFP_KERNEL); if (wm8776 == NULL) return -ENOMEM; wm8776->regmap = devm_regmap_init_spi(spi, &wm8776_regmap); if (IS_ERR(wm8776->regmap)) return PTR_ERR(wm8776->regmap); spi_set_drvdata(spi, wm8776); ret = snd_soc_register_codec(&spi->dev, &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai)); return ret; } static int wm8776_spi_remove(struct spi_device *spi) { snd_soc_unregister_codec(&spi->dev); return 0; } static struct spi_driver wm8776_spi_driver = { .driver = { .name = "wm8776", .of_match_table = wm8776_of_match, }, .probe = wm8776_spi_probe, .remove = wm8776_spi_remove, }; #endif /* CONFIG_SPI_MASTER */ #if IS_ENABLED(CONFIG_I2C) static int wm8776_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct wm8776_priv *wm8776; int ret; wm8776 = devm_kzalloc(&i2c->dev, sizeof(struct wm8776_priv), GFP_KERNEL); if (wm8776 == NULL) return -ENOMEM; wm8776->regmap = devm_regmap_init_i2c(i2c, &wm8776_regmap); if (IS_ERR(wm8776->regmap)) return PTR_ERR(wm8776->regmap); i2c_set_clientdata(i2c, wm8776); ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai)); return ret; } static int wm8776_i2c_remove(struct i2c_client *client) { snd_soc_unregister_codec(&client->dev); return 0; } static const struct i2c_device_id wm8776_i2c_id[] = { { "wm8775", WM8775 }, { "wm8776", WM8776 }, { } }; MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id); static struct i2c_driver wm8776_i2c_driver = { .driver = { .name = "wm8776", .of_match_table = wm8776_of_match, }, .probe = wm8776_i2c_probe, .remove = wm8776_i2c_remove, .id_table = wm8776_i2c_id, }; #endif static int __init wm8776_modinit(void) { int ret = 0; #if IS_ENABLED(CONFIG_I2C) ret = i2c_add_driver(&wm8776_i2c_driver); if (ret != 0) { printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n", ret); } #endif #if defined(CONFIG_SPI_MASTER) ret = spi_register_driver(&wm8776_spi_driver); if (ret != 0) { printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n", ret); } #endif return ret; } module_init(wm8776_modinit); static void __exit wm8776_exit(void) { #if IS_ENABLED(CONFIG_I2C) i2c_del_driver(&wm8776_i2c_driver); #endif #if defined(CONFIG_SPI_MASTER) spi_unregister_driver(&wm8776_spi_driver); #endif } module_exit(wm8776_exit); MODULE_DESCRIPTION("ASoC WM8776 driver"); MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); MODULE_LICENSE("GPL");