diff options
Diffstat (limited to 'sound/soc/codecs/wm8728.c')
| -rw-r--r-- | sound/soc/codecs/wm8728.c | 585 |
1 files changed, 0 insertions, 585 deletions
diff --git a/sound/soc/codecs/wm8728.c b/sound/soc/codecs/wm8728.c deleted file mode 100644 index d905e25b1a93..000000000000 --- a/sound/soc/codecs/wm8728.c +++ /dev/null @@ -1,585 +0,0 @@ -/* - * 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 <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 inline unsigned int wm8728_read_reg_cache(struct snd_soc_codec *codec, - unsigned int reg) -{ - u16 *cache = codec->reg_cache; - BUG_ON(reg > ARRAY_SIZE(wm8728_reg_defaults)); - return cache[reg]; -} - -static inline void wm8728_write_reg_cache(struct snd_soc_codec *codec, - u16 reg, unsigned int value) -{ - u16 *cache = codec->reg_cache; - BUG_ON(reg > ARRAY_SIZE(wm8728_reg_defaults)); - cache[reg] = value; -} - -/* - * write to the WM8728 register space - */ -static int wm8728_write(struct snd_soc_codec *codec, unsigned int reg, - unsigned int value) -{ - u8 data[2]; - - /* data is - * D15..D9 WM8728 register offset - * D8...D0 register data - */ - data[0] = (reg << 1) | ((value >> 8) & 0x0001); - data[1] = value & 0x00ff; - - wm8728_write_reg_cache(codec, reg, value); - - if (codec->hw_write(codec->control_data, data, 2) == 2) - return 0; - else - return -EIO; -} - -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), -}; - -static int wm8728_add_controls(struct snd_soc_codec *codec) -{ - int err, i; - - for (i = 0; i < ARRAY_SIZE(wm8728_snd_controls); i++) { - err = snd_ctl_add(codec->card, - snd_soc_cnew(&wm8728_snd_controls[i], - codec, NULL)); - if (err < 0) - return err; - } - - return 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)); - - snd_soc_dapm_new_widgets(codec); - - return 0; -} - -static int wm8728_mute(struct snd_soc_dai *dai, int mute) -{ - struct snd_soc_codec *codec = dai->codec; - u16 mute_reg = wm8728_read_reg_cache(codec, WM8728_DACCTL); - - if (mute) - wm8728_write(codec, WM8728_DACCTL, mute_reg | 1); - else - wm8728_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->codec; - u16 dac = wm8728_read_reg_cache(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; - } - - wm8728_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 = wm8728_read_reg_cache(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; - } - - wm8728_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 = wm8728_read_reg_cache(codec, WM8728_DACCTL); - wm8728_write(codec, WM8728_DACCTL, reg & ~0x4); - - /* ..then sync in the register cache. */ - for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++) - wm8728_write(codec, i, - wm8728_read_reg_cache(codec, i)); - } - break; - - case SND_SOC_BIAS_OFF: - reg = wm8728_read_reg_cache(codec, WM8728_DACCTL); - wm8728_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) - -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 = { - .hw_params = wm8728_hw_params, - .digital_mute = wm8728_mute, - .set_fmt = wm8728_set_dai_fmt, - } -}; -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->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->codec; - - wm8728_set_bias_level(codec, codec->suspend_bias_level); - - return 0; -} - -/* - * initialise the WM8728 driver - * register the mixer and dsp interfaces with the kernel - */ -static int wm8728_init(struct snd_soc_device *socdev) -{ - struct snd_soc_codec *codec = socdev->codec; - int ret = 0; - - codec->name = "WM8728"; - codec->owner = THIS_MODULE; - codec->read = wm8728_read_reg_cache; - codec->write = wm8728_write; - 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; - - /* 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 pcm_err; - } - - /* power on device */ - wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY); - - wm8728_add_controls(codec); - wm8728_add_widgets(codec); - ret = snd_soc_init_card(socdev); - if (ret < 0) { - printk(KERN_ERR "wm8728: failed to register card\n"); - goto card_err; - } - - return ret; - -card_err: - snd_soc_free_pcms(socdev); - snd_soc_dapm_free(socdev); -pcm_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->codec; - int ret; - - i2c_set_clientdata(i2c, codec); - codec->control_data = i2c; - - ret = wm8728_init(socdev); - 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->codec; - int ret; - - codec->control_data = spi; - - ret = wm8728_init(socdev); - 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), -}; - -static int wm8728_spi_write(struct spi_device *spi, const char *data, int len) -{ - struct spi_transfer t; - struct spi_message m; - u8 msg[2]; - - if (len <= 0) - return 0; - - msg[0] = data[0]; - msg[1] = data[1]; - - spi_message_init(&m); - memset(&t, 0, (sizeof t)); - - t.tx_buf = &msg[0]; - t.len = len; - - spi_message_add_tail(&t, &m); - spi_sync(spi, &m); - - return len; -} -#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->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) { - codec->hw_write = (hw_write_t)i2c_master_send; - ret = wm8728_add_i2c_device(pdev, setup); - } -#endif -#if defined(CONFIG_SPI_MASTER) - if (setup->spi) { - codec->hw_write = (hw_write_t)wm8728_spi_write; - 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->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 __devinit 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"); |