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- /*
- * 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");
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