diff options
Diffstat (limited to 'sound/soc/codecs/wm8711.c')
| -rw-r--r-- | sound/soc/codecs/wm8711.c | 525 |
1 files changed, 525 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8711.c b/sound/soc/codecs/wm8711.c new file mode 100644 index 000000000..121e46d53 --- /dev/null +++ b/sound/soc/codecs/wm8711.c @@ -0,0 +1,525 @@ +/* + * wm8711.c -- WM8711 ALSA SoC Audio driver + * + * Copyright 2006 Wolfson Microelectronics + * + * Author: Mike Arthur <Mike.Arthur@wolfsonmicro.com> + * + * Based on wm8731.c by Richard Purdie + * + * 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 <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/regmap.h> +#include <linux/spi/spi.h> +#include <linux/slab.h> +#include <linux/of_device.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/tlv.h> +#include <sound/initval.h> + +#include "wm8711.h" + +/* codec private data */ +struct wm8711_priv { + struct regmap *regmap; + unsigned int sysclk; +}; + +/* + * wm8711 register cache + * We can't read the WM8711 register space when we are + * using 2 wire for device control, so we cache them instead. + * There is no point in caching the reset register + */ +static const struct reg_default wm8711_reg_defaults[] = { + { 0, 0x0079 }, { 1, 0x0079 }, { 2, 0x000a }, { 3, 0x0008 }, + { 4, 0x009f }, { 5, 0x000a }, { 6, 0x0000 }, { 7, 0x0000 }, +}; + +static bool wm8711_volatile(struct device *dev, unsigned int reg) +{ + switch (reg) { + case WM8711_RESET: + return true; + default: + return false; + } +} + +#define wm8711_reset(c) snd_soc_write(c, WM8711_RESET, 0) + +static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); + +static const struct snd_kcontrol_new wm8711_snd_controls[] = { + +SOC_DOUBLE_R_TLV("Master Playback Volume", WM8711_LOUT1V, WM8711_ROUT1V, + 0, 127, 0, out_tlv), +SOC_DOUBLE_R("Master Playback ZC Switch", WM8711_LOUT1V, WM8711_ROUT1V, + 7, 1, 0), + +}; + +/* Output Mixer */ +static const struct snd_kcontrol_new wm8711_output_mixer_controls[] = { +SOC_DAPM_SINGLE("Line Bypass Switch", WM8711_APANA, 3, 1, 0), +SOC_DAPM_SINGLE("HiFi Playback Switch", WM8711_APANA, 4, 1, 0), +}; + +static const struct snd_soc_dapm_widget wm8711_dapm_widgets[] = { +SND_SOC_DAPM_MIXER("Output Mixer", WM8711_PWR, 4, 1, + &wm8711_output_mixer_controls[0], + ARRAY_SIZE(wm8711_output_mixer_controls)), +SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8711_PWR, 3, 1), +SND_SOC_DAPM_OUTPUT("LOUT"), +SND_SOC_DAPM_OUTPUT("LHPOUT"), +SND_SOC_DAPM_OUTPUT("ROUT"), +SND_SOC_DAPM_OUTPUT("RHPOUT"), +}; + +static const struct snd_soc_dapm_route wm8711_intercon[] = { + /* output mixer */ + {"Output Mixer", "Line Bypass Switch", "Line Input"}, + {"Output Mixer", "HiFi Playback Switch", "DAC"}, + + /* outputs */ + {"RHPOUT", NULL, "Output Mixer"}, + {"ROUT", NULL, "Output Mixer"}, + {"LHPOUT", NULL, "Output Mixer"}, + {"LOUT", NULL, "Output Mixer"}, +}; + +struct _coeff_div { + u32 mclk; + u32 rate; + u16 fs; + u8 sr:4; + u8 bosr:1; + u8 usb:1; +}; + +/* codec mclk clock divider coefficients */ +static const struct _coeff_div coeff_div[] = { + /* 48k */ + {12288000, 48000, 256, 0x0, 0x0, 0x0}, + {18432000, 48000, 384, 0x0, 0x1, 0x0}, + {12000000, 48000, 250, 0x0, 0x0, 0x1}, + + /* 32k */ + {12288000, 32000, 384, 0x6, 0x0, 0x0}, + {18432000, 32000, 576, 0x6, 0x1, 0x0}, + {12000000, 32000, 375, 0x6, 0x0, 0x1}, + + /* 8k */ + {12288000, 8000, 1536, 0x3, 0x0, 0x0}, + {18432000, 8000, 2304, 0x3, 0x1, 0x0}, + {11289600, 8000, 1408, 0xb, 0x0, 0x0}, + {16934400, 8000, 2112, 0xb, 0x1, 0x0}, + {12000000, 8000, 1500, 0x3, 0x0, 0x1}, + + /* 96k */ + {12288000, 96000, 128, 0x7, 0x0, 0x0}, + {18432000, 96000, 192, 0x7, 0x1, 0x0}, + {12000000, 96000, 125, 0x7, 0x0, 0x1}, + + /* 44.1k */ + {11289600, 44100, 256, 0x8, 0x0, 0x0}, + {16934400, 44100, 384, 0x8, 0x1, 0x0}, + {12000000, 44100, 272, 0x8, 0x1, 0x1}, + + /* 88.2k */ + {11289600, 88200, 128, 0xf, 0x0, 0x0}, + {16934400, 88200, 192, 0xf, 0x1, 0x0}, + {12000000, 88200, 136, 0xf, 0x1, 0x1}, +}; + +static inline int get_coeff(int mclk, int rate) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { + if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) + return i; + } + return 0; +} + +static int wm8711_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 wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec); + u16 iface = snd_soc_read(codec, WM8711_IFACE) & 0xfff3; + int i = get_coeff(wm8711->sysclk, params_rate(params)); + u16 srate = (coeff_div[i].sr << 2) | + (coeff_div[i].bosr << 1) | coeff_div[i].usb; + + snd_soc_write(codec, WM8711_SRATE, srate); + + /* bit size */ + switch (params_width(params)) { + case 16: + break; + case 20: + iface |= 0x0004; + break; + case 24: + iface |= 0x0008; + break; + } + + snd_soc_write(codec, WM8711_IFACE, iface); + return 0; +} + +static int wm8711_pcm_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct snd_soc_codec *codec = dai->codec; + + /* set active */ + snd_soc_write(codec, WM8711_ACTIVE, 0x0001); + + return 0; +} + +static void wm8711_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct snd_soc_codec *codec = dai->codec; + + /* deactivate */ + if (!snd_soc_codec_is_active(codec)) { + udelay(50); + snd_soc_write(codec, WM8711_ACTIVE, 0x0); + } +} + +static int wm8711_mute(struct snd_soc_dai *dai, int mute) +{ + struct snd_soc_codec *codec = dai->codec; + u16 mute_reg = snd_soc_read(codec, WM8711_APDIGI) & 0xfff7; + + if (mute) + snd_soc_write(codec, WM8711_APDIGI, mute_reg | 0x8); + else + snd_soc_write(codec, WM8711_APDIGI, mute_reg); + + return 0; +} + +static int wm8711_set_dai_sysclk(struct snd_soc_dai *codec_dai, + int clk_id, unsigned int freq, int dir) +{ + struct snd_soc_codec *codec = codec_dai->codec; + struct wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec); + + switch (freq) { + case 11289600: + case 12000000: + case 12288000: + case 16934400: + case 18432000: + wm8711->sysclk = freq; + return 0; + } + return -EINVAL; +} + +static int wm8711_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, WM8711_IFACE) & 0x000c; + + /* set master/slave audio interface */ + switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { + case SND_SOC_DAIFMT_CBM_CFM: + iface |= 0x0040; + break; + case SND_SOC_DAIFMT_CBS_CFS: + break; + default: + return -EINVAL; + } + + /* interface format */ + 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; + case SND_SOC_DAIFMT_DSP_A: + iface |= 0x0003; + break; + case SND_SOC_DAIFMT_DSP_B: + iface |= 0x0013; + break; + default: + return -EINVAL; + } + + /* clock inversion */ + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_NF: + break; + case SND_SOC_DAIFMT_IB_IF: + iface |= 0x0090; + break; + case SND_SOC_DAIFMT_IB_NF: + iface |= 0x0080; + break; + case SND_SOC_DAIFMT_NB_IF: + iface |= 0x0010; + break; + default: + return -EINVAL; + } + + /* set iface */ + snd_soc_write(codec, WM8711_IFACE, iface); + return 0; +} + +static int wm8711_set_bias_level(struct snd_soc_codec *codec, + enum snd_soc_bias_level level) +{ + struct wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec); + u16 reg = snd_soc_read(codec, WM8711_PWR) & 0xff7f; + + switch (level) { + case SND_SOC_BIAS_ON: + snd_soc_write(codec, WM8711_PWR, reg); + break; + case SND_SOC_BIAS_PREPARE: + break; + case SND_SOC_BIAS_STANDBY: + if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) + regcache_sync(wm8711->regmap); + + snd_soc_write(codec, WM8711_PWR, reg | 0x0040); + break; + case SND_SOC_BIAS_OFF: + snd_soc_write(codec, WM8711_ACTIVE, 0x0); + snd_soc_write(codec, WM8711_PWR, 0xffff); + break; + } + codec->dapm.bias_level = level; + return 0; +} + +#define WM8711_RATES SNDRV_PCM_RATE_8000_96000 + +#define WM8711_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ + SNDRV_PCM_FMTBIT_S24_LE) + +static const struct snd_soc_dai_ops wm8711_ops = { + .prepare = wm8711_pcm_prepare, + .hw_params = wm8711_hw_params, + .shutdown = wm8711_shutdown, + .digital_mute = wm8711_mute, + .set_sysclk = wm8711_set_dai_sysclk, + .set_fmt = wm8711_set_dai_fmt, +}; + +static struct snd_soc_dai_driver wm8711_dai = { + .name = "wm8711-hifi", + .playback = { + .stream_name = "Playback", + .channels_min = 1, + .channels_max = 2, + .rates = WM8711_RATES, + .formats = WM8711_FORMATS, + }, + .ops = &wm8711_ops, +}; + +static int wm8711_probe(struct snd_soc_codec *codec) +{ + int ret; + + ret = wm8711_reset(codec); + if (ret < 0) { + dev_err(codec->dev, "Failed to issue reset\n"); + return ret; + } + + /* Latch the update bits */ + snd_soc_update_bits(codec, WM8711_LOUT1V, 0x0100, 0x0100); + snd_soc_update_bits(codec, WM8711_ROUT1V, 0x0100, 0x0100); + + return ret; + +} + +static struct snd_soc_codec_driver soc_codec_dev_wm8711 = { + .probe = wm8711_probe, + .set_bias_level = wm8711_set_bias_level, + .suspend_bias_off = true, + + .controls = wm8711_snd_controls, + .num_controls = ARRAY_SIZE(wm8711_snd_controls), + .dapm_widgets = wm8711_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(wm8711_dapm_widgets), + .dapm_routes = wm8711_intercon, + .num_dapm_routes = ARRAY_SIZE(wm8711_intercon), +}; + +static const struct of_device_id wm8711_of_match[] = { + { .compatible = "wlf,wm8711", }, + { } +}; +MODULE_DEVICE_TABLE(of, wm8711_of_match); + +static const struct regmap_config wm8711_regmap = { + .reg_bits = 7, + .val_bits = 9, + .max_register = WM8711_RESET, + + .reg_defaults = wm8711_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(wm8711_reg_defaults), + .cache_type = REGCACHE_RBTREE, + + .volatile_reg = wm8711_volatile, +}; + +#if defined(CONFIG_SPI_MASTER) +static int wm8711_spi_probe(struct spi_device *spi) +{ + struct wm8711_priv *wm8711; + int ret; + + wm8711 = devm_kzalloc(&spi->dev, sizeof(struct wm8711_priv), + GFP_KERNEL); + if (wm8711 == NULL) + return -ENOMEM; + + wm8711->regmap = devm_regmap_init_spi(spi, &wm8711_regmap); + if (IS_ERR(wm8711->regmap)) + return PTR_ERR(wm8711->regmap); + + spi_set_drvdata(spi, wm8711); + + ret = snd_soc_register_codec(&spi->dev, + &soc_codec_dev_wm8711, &wm8711_dai, 1); + + return ret; +} + +static int wm8711_spi_remove(struct spi_device *spi) +{ + snd_soc_unregister_codec(&spi->dev); + + return 0; +} + +static struct spi_driver wm8711_spi_driver = { + .driver = { + .name = "wm8711", + .owner = THIS_MODULE, + .of_match_table = wm8711_of_match, + }, + .probe = wm8711_spi_probe, + .remove = wm8711_spi_remove, +}; +#endif /* CONFIG_SPI_MASTER */ + +#if IS_ENABLED(CONFIG_I2C) +static int wm8711_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct wm8711_priv *wm8711; + int ret; + + wm8711 = devm_kzalloc(&client->dev, sizeof(struct wm8711_priv), + GFP_KERNEL); + if (wm8711 == NULL) + return -ENOMEM; + + wm8711->regmap = devm_regmap_init_i2c(client, &wm8711_regmap); + if (IS_ERR(wm8711->regmap)) + return PTR_ERR(wm8711->regmap); + + i2c_set_clientdata(client, wm8711); + + ret = snd_soc_register_codec(&client->dev, + &soc_codec_dev_wm8711, &wm8711_dai, 1); + + return ret; +} + +static int wm8711_i2c_remove(struct i2c_client *client) +{ + snd_soc_unregister_codec(&client->dev); + return 0; +} + +static const struct i2c_device_id wm8711_i2c_id[] = { + { "wm8711", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, wm8711_i2c_id); + +static struct i2c_driver wm8711_i2c_driver = { + .driver = { + .name = "wm8711", + .owner = THIS_MODULE, + .of_match_table = wm8711_of_match, + }, + .probe = wm8711_i2c_probe, + .remove = wm8711_i2c_remove, + .id_table = wm8711_i2c_id, +}; +#endif + +static int __init wm8711_modinit(void) +{ + int ret; +#if IS_ENABLED(CONFIG_I2C) + ret = i2c_add_driver(&wm8711_i2c_driver); + if (ret != 0) { + printk(KERN_ERR "Failed to register WM8711 I2C driver: %d\n", + ret); + } +#endif +#if defined(CONFIG_SPI_MASTER) + ret = spi_register_driver(&wm8711_spi_driver); + if (ret != 0) { + printk(KERN_ERR "Failed to register WM8711 SPI driver: %d\n", + ret); + } +#endif + return 0; +} +module_init(wm8711_modinit); + +static void __exit wm8711_exit(void) +{ +#if IS_ENABLED(CONFIG_I2C) + i2c_del_driver(&wm8711_i2c_driver); +#endif +#if defined(CONFIG_SPI_MASTER) + spi_unregister_driver(&wm8711_spi_driver); +#endif +} +module_exit(wm8711_exit); + +MODULE_DESCRIPTION("ASoC WM8711 driver"); +MODULE_AUTHOR("Mike Arthur"); +MODULE_LICENSE("GPL"); |