| /* |
| * wm8728.c -- WM8728 ALSA SoC Audio driver |
| * |
| * Copyright 2008 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. |
| */ |
| |
| #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/platform_device.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/soc-dapm.h> |
| #include <sound/initval.h> |
| #include <sound/tlv.h> |
| |
| #include "wm8728.h" |
| |
| struct snd_soc_codec_device soc_codec_dev_wm8728; |
| |
| /* |
| * 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 u16 wm8728_reg_defaults[] = { |
| 0x1ff, |
| 0x1ff, |
| 0x001, |
| 0x100, |
| }; |
| |
| 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 intercon[] = { |
| {"VOUTL", NULL, "DAC"}, |
| {"VOUTR", NULL, "DAC"}, |
| }; |
| |
| static int wm8728_add_widgets(struct snd_soc_codec *codec) |
| { |
| snd_soc_dapm_new_controls(codec, wm8728_dapm_widgets, |
| ARRAY_SIZE(wm8728_dapm_widgets)); |
| |
| snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); |
| |
| return 0; |
| } |
| |
| 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_pcm_runtime *rtd = substream->private_data; |
| struct snd_soc_device *socdev = rtd->socdev; |
| struct snd_soc_codec *codec = socdev->card->codec; |
| u16 dac = snd_soc_read(codec, WM8728_DACCTL); |
| |
| dac &= ~0x18; |
| |
| switch (params_format(params)) { |
| case SNDRV_PCM_FORMAT_S16_LE: |
| break; |
| case SNDRV_PCM_FORMAT_S20_3LE: |
| dac |= 0x10; |
| break; |
| case SNDRV_PCM_FORMAT_S24_LE: |
| 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) |
| { |
| u16 reg; |
| int i; |
| |
| switch (level) { |
| case SND_SOC_BIAS_ON: |
| case SND_SOC_BIAS_PREPARE: |
| case SND_SOC_BIAS_STANDBY: |
| if (codec->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. */ |
| for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++) |
| snd_soc_write(codec, i, |
| snd_soc_read(codec, i)); |
| } |
| break; |
| |
| case SND_SOC_BIAS_OFF: |
| reg = snd_soc_read(codec, WM8728_DACCTL); |
| snd_soc_write(codec, WM8728_DACCTL, reg | 0x4); |
| break; |
| } |
| codec->bias_level = level; |
| 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 struct snd_soc_dai_ops wm8728_dai_ops = { |
| .hw_params = wm8728_hw_params, |
| .digital_mute = wm8728_mute, |
| .set_fmt = wm8728_set_dai_fmt, |
| }; |
| |
| struct snd_soc_dai wm8728_dai = { |
| .name = "WM8728", |
| .playback = { |
| .stream_name = "Playback", |
| .channels_min = 2, |
| .channels_max = 2, |
| .rates = WM8728_RATES, |
| .formats = WM8728_FORMATS, |
| }, |
| .ops = &wm8728_dai_ops, |
| }; |
| EXPORT_SYMBOL_GPL(wm8728_dai); |
| |
| static int wm8728_suspend(struct platform_device *pdev, pm_message_t state) |
| { |
| struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| struct snd_soc_codec *codec = socdev->card->codec; |
| |
| wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF); |
| |
| return 0; |
| } |
| |
| static int wm8728_resume(struct platform_device *pdev) |
| { |
| struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| struct snd_soc_codec *codec = socdev->card->codec; |
| |
| wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY); |
| |
| return 0; |
| } |
| |
| /* |
| * initialise the WM8728 driver |
| * register the mixer and dsp interfaces with the kernel |
| */ |
| static int wm8728_init(struct snd_soc_device *socdev, |
| enum snd_soc_control_type control) |
| { |
| struct snd_soc_codec *codec = socdev->card->codec; |
| int ret = 0; |
| |
| codec->name = "WM8728"; |
| codec->owner = THIS_MODULE; |
| codec->set_bias_level = wm8728_set_bias_level; |
| codec->dai = &wm8728_dai; |
| codec->num_dai = 1; |
| codec->bias_level = SND_SOC_BIAS_OFF; |
| codec->reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults); |
| codec->reg_cache = kmemdup(wm8728_reg_defaults, |
| sizeof(wm8728_reg_defaults), |
| GFP_KERNEL); |
| if (codec->reg_cache == NULL) |
| return -ENOMEM; |
| |
| ret = snd_soc_codec_set_cache_io(codec, 7, 9, control); |
| if (ret < 0) { |
| printk(KERN_ERR "wm8728: failed to configure cache I/O: %d\n", |
| ret); |
| goto err; |
| } |
| |
| /* register pcms */ |
| ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); |
| if (ret < 0) { |
| printk(KERN_ERR "wm8728: failed to create pcms\n"); |
| goto err; |
| } |
| |
| /* power on device */ |
| wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY); |
| |
| snd_soc_add_controls(codec, wm8728_snd_controls, |
| ARRAY_SIZE(wm8728_snd_controls)); |
| wm8728_add_widgets(codec); |
| |
| return ret; |
| |
| err: |
| kfree(codec->reg_cache); |
| return ret; |
| } |
| |
| static struct snd_soc_device *wm8728_socdev; |
| |
| #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
| |
| /* |
| * WM8728 2 wire address is determined by GPIO5 |
| * state during powerup. |
| * low = 0x1a |
| * high = 0x1b |
| */ |
| |
| static int wm8728_i2c_probe(struct i2c_client *i2c, |
| const struct i2c_device_id *id) |
| { |
| struct snd_soc_device *socdev = wm8728_socdev; |
| struct snd_soc_codec *codec = socdev->card->codec; |
| int ret; |
| |
| i2c_set_clientdata(i2c, codec); |
| codec->control_data = i2c; |
| |
| ret = wm8728_init(socdev, SND_SOC_I2C); |
| if (ret < 0) |
| pr_err("failed to initialise WM8728\n"); |
| |
| return ret; |
| } |
| |
| static int wm8728_i2c_remove(struct i2c_client *client) |
| { |
| struct snd_soc_codec *codec = i2c_get_clientdata(client); |
| kfree(codec->reg_cache); |
| 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 I2C Codec", |
| .owner = THIS_MODULE, |
| }, |
| .probe = wm8728_i2c_probe, |
| .remove = wm8728_i2c_remove, |
| .id_table = wm8728_i2c_id, |
| }; |
| |
| static int wm8728_add_i2c_device(struct platform_device *pdev, |
| const struct wm8728_setup_data *setup) |
| { |
| struct i2c_board_info info; |
| struct i2c_adapter *adapter; |
| struct i2c_client *client; |
| int ret; |
| |
| ret = i2c_add_driver(&wm8728_i2c_driver); |
| if (ret != 0) { |
| dev_err(&pdev->dev, "can't add i2c driver\n"); |
| return ret; |
| } |
| |
| memset(&info, 0, sizeof(struct i2c_board_info)); |
| info.addr = setup->i2c_address; |
| strlcpy(info.type, "wm8728", I2C_NAME_SIZE); |
| |
| adapter = i2c_get_adapter(setup->i2c_bus); |
| if (!adapter) { |
| dev_err(&pdev->dev, "can't get i2c adapter %d\n", |
| setup->i2c_bus); |
| goto err_driver; |
| } |
| |
| client = i2c_new_device(adapter, &info); |
| i2c_put_adapter(adapter); |
| if (!client) { |
| dev_err(&pdev->dev, "can't add i2c device at 0x%x\n", |
| (unsigned int)info.addr); |
| goto err_driver; |
| } |
| |
| return 0; |
| |
| err_driver: |
| i2c_del_driver(&wm8728_i2c_driver); |
| return -ENODEV; |
| } |
| #endif |
| |
| #if defined(CONFIG_SPI_MASTER) |
| static int __devinit wm8728_spi_probe(struct spi_device *spi) |
| { |
| struct snd_soc_device *socdev = wm8728_socdev; |
| struct snd_soc_codec *codec = socdev->card->codec; |
| int ret; |
| |
| codec->control_data = spi; |
| |
| ret = wm8728_init(socdev, SND_SOC_SPI); |
| if (ret < 0) |
| dev_err(&spi->dev, "failed to initialise WM8728\n"); |
| |
| return ret; |
| } |
| |
| static int __devexit wm8728_spi_remove(struct spi_device *spi) |
| { |
| return 0; |
| } |
| |
| static struct spi_driver wm8728_spi_driver = { |
| .driver = { |
| .name = "wm8728", |
| .bus = &spi_bus_type, |
| .owner = THIS_MODULE, |
| }, |
| .probe = wm8728_spi_probe, |
| .remove = __devexit_p(wm8728_spi_remove), |
| }; |
| #endif /* CONFIG_SPI_MASTER */ |
| |
| static int wm8728_probe(struct platform_device *pdev) |
| { |
| struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| struct wm8728_setup_data *setup; |
| struct snd_soc_codec *codec; |
| int ret = 0; |
| |
| setup = socdev->codec_data; |
| codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); |
| if (codec == NULL) |
| return -ENOMEM; |
| |
| socdev->card->codec = codec; |
| mutex_init(&codec->mutex); |
| INIT_LIST_HEAD(&codec->dapm_widgets); |
| INIT_LIST_HEAD(&codec->dapm_paths); |
| |
| wm8728_socdev = socdev; |
| ret = -ENODEV; |
| |
| #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
| if (setup->i2c_address) { |
| ret = wm8728_add_i2c_device(pdev, setup); |
| } |
| #endif |
| #if defined(CONFIG_SPI_MASTER) |
| if (setup->spi) { |
| ret = spi_register_driver(&wm8728_spi_driver); |
| if (ret != 0) |
| printk(KERN_ERR "can't add spi driver"); |
| } |
| #endif |
| |
| if (ret != 0) |
| kfree(codec); |
| |
| return ret; |
| } |
| |
| /* power down chip */ |
| static int wm8728_remove(struct platform_device *pdev) |
| { |
| struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| struct snd_soc_codec *codec = socdev->card->codec; |
| |
| if (codec->control_data) |
| wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF); |
| |
| snd_soc_free_pcms(socdev); |
| snd_soc_dapm_free(socdev); |
| #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
| i2c_unregister_device(codec->control_data); |
| i2c_del_driver(&wm8728_i2c_driver); |
| #endif |
| #if defined(CONFIG_SPI_MASTER) |
| spi_unregister_driver(&wm8728_spi_driver); |
| #endif |
| kfree(codec); |
| |
| return 0; |
| } |
| |
| struct snd_soc_codec_device soc_codec_dev_wm8728 = { |
| .probe = wm8728_probe, |
| .remove = wm8728_remove, |
| .suspend = wm8728_suspend, |
| .resume = wm8728_resume, |
| }; |
| EXPORT_SYMBOL_GPL(soc_codec_dev_wm8728); |
| |
| static int __init wm8728_modinit(void) |
| { |
| return snd_soc_register_dai(&wm8728_dai); |
| } |
| module_init(wm8728_modinit); |
| |
| static void __exit wm8728_exit(void) |
| { |
| snd_soc_unregister_dai(&wm8728_dai); |
| } |
| module_exit(wm8728_exit); |
| |
| MODULE_DESCRIPTION("ASoC WM8728 driver"); |
| MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); |
| MODULE_LICENSE("GPL"); |