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https://github.com/adulau/aha.git
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ASoC: Update WM8974 to use standard I2C device probe methods
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown
parent
1a55b3f6ed
commit
4fcbbb67a3
2 changed files with 133 additions and 173 deletions
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@ -3,7 +3,7 @@
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*
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* Copyright 2006 Wolfson Microelectronics PLC.
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*
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* Author: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
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* Author: Liam Girdwood <linux@wolfsonmicro.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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@ -28,13 +28,6 @@
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#include "wm8974.h"
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struct snd_soc_codec_device soc_codec_dev_wm8974;
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/*
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* wm8974 register cache
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* We can't read the WM8974 register space when we are
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* using 2 wire for device control, so we cache them instead.
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*/
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static const u16 wm8974_reg[WM8974_CACHEREGNUM] = {
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0x0000, 0x0000, 0x0000, 0x0000,
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0x0050, 0x0000, 0x0140, 0x0000,
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@ -53,6 +46,13 @@ static const u16 wm8974_reg[WM8974_CACHEREGNUM] = {
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0x0000,
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};
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struct wm8974_priv {
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struct snd_soc_codec codec;
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u16 reg_cache[WM8974_CACHEREGNUM];
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};
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static struct snd_soc_codec *wm8974_codec;
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/*
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* read wm8974 register cache
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*/
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@ -623,178 +623,42 @@ static int wm8974_resume(struct platform_device *pdev)
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return 0;
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}
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/*
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* initialise the WM8974 driver
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* register the mixer and dsp interfaces with the kernel
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*/
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static int wm8974_init(struct snd_soc_device *socdev)
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static int wm8974_probe(struct platform_device *pdev)
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{
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struct snd_soc_codec *codec = socdev->card->codec;
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec;
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int ret = 0;
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codec->name = "WM8974";
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codec->owner = THIS_MODULE;
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codec->read = wm8974_read_reg_cache;
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codec->write = wm8974_write;
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codec->set_bias_level = wm8974_set_bias_level;
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codec->dai = &wm8974_dai;
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codec->num_dai = 1;
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codec->reg_cache_size = ARRAY_SIZE(wm8974_reg);
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codec->reg_cache = kmemdup(wm8974_reg, sizeof(wm8974_reg), GFP_KERNEL);
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if (wm8974_codec == NULL) {
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dev_err(&pdev->dev, "Codec device not registered\n");
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return -ENODEV;
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}
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if (codec->reg_cache == NULL)
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return -ENOMEM;
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wm8974_reset(codec);
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socdev->card->codec = wm8974_codec;
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codec = wm8974_codec;
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/* register pcms */
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ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
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if (ret < 0) {
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printk(KERN_ERR "wm8974: failed to create pcms\n");
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dev_err(codec->dev, "failed to create pcms: %d\n", ret);
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goto pcm_err;
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}
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/* power on device */
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wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
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wm8974_add_controls(codec);
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snd_soc_add_controls(codec, wm8974_snd_controls,
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ARRAY_SIZE(wm8974_snd_controls));
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wm8974_add_widgets(codec);
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ret = snd_soc_init_card(socdev);
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if (ret < 0) {
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printk(KERN_ERR "wm8974: failed to register card\n");
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dev_err(codec->dev, "failed to register card: %d\n", ret);
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goto card_err;
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}
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return ret;
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card_err:
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snd_soc_free_pcms(socdev);
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snd_soc_dapm_free(socdev);
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pcm_err:
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kfree(codec->reg_cache);
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return ret;
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}
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static struct snd_soc_device *wm8974_socdev;
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#if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
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/*
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* WM8974 2 wire address is 0x1a
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*/
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#define I2C_DRIVERID_WM8974 0xfefe /* liam - need a proper id */
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static unsigned short normal_i2c[] = { 0, I2C_CLIENT_END };
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/* Magic definition of all other variables and things */
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I2C_CLIENT_INSMOD;
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static struct i2c_driver wm8974_i2c_driver;
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static struct i2c_client client_template;
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/* If the i2c layer weren't so broken, we could pass this kind of data
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around */
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static int wm8974_codec_probe(struct i2c_adapter *adap, int addr, int kind)
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{
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struct snd_soc_device *socdev = wm8974_socdev;
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struct wm8974_setup_data *setup = socdev->codec_data;
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struct snd_soc_codec *codec = socdev->card->codec;
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struct i2c_client *i2c;
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int ret;
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if (addr != setup->i2c_address)
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return -ENODEV;
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client_template.adapter = adap;
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client_template.addr = addr;
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i2c = kmemdup(&client_template, sizeof(client_template), GFP_KERNEL);
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if (i2c == NULL) {
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kfree(codec);
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return -ENOMEM;
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}
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i2c_set_clientdata(i2c, codec);
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codec->control_data = i2c;
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ret = i2c_attach_client(i2c);
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if (ret < 0) {
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pr_err("failed to attach codec at addr %x\n", addr);
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goto err;
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}
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ret = wm8974_init(socdev);
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if (ret < 0) {
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pr_err("failed to initialise WM8974\n");
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goto err;
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}
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return ret;
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err:
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kfree(codec);
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kfree(i2c);
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return ret;
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}
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static int wm8974_i2c_detach(struct i2c_client *client)
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{
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struct snd_soc_codec *codec = i2c_get_clientdata(client);
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i2c_detach_client(client);
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kfree(codec->reg_cache);
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kfree(client);
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return 0;
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}
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static int wm8974_i2c_attach(struct i2c_adapter *adap)
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{
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return i2c_probe(adap, &addr_data, wm8974_codec_probe);
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}
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/* corgi i2c codec control layer */
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static struct i2c_driver wm8974_i2c_driver = {
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.driver = {
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.name = "WM8974 I2C Codec",
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.owner = THIS_MODULE,
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},
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.id = I2C_DRIVERID_WM8974,
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.attach_adapter = wm8974_i2c_attach,
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.detach_client = wm8974_i2c_detach,
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.command = NULL,
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};
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static struct i2c_client client_template = {
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.name = "WM8974",
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.driver = &wm8974_i2c_driver,
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};
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#endif
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static int wm8974_probe(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct wm8974_setup_data *setup;
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struct snd_soc_codec *codec;
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int ret = 0;
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setup = socdev->codec_data;
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codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
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if (codec == NULL)
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return -ENOMEM;
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socdev->card->codec = codec;
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mutex_init(&codec->mutex);
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INIT_LIST_HEAD(&codec->dapm_widgets);
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INIT_LIST_HEAD(&codec->dapm_paths);
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wm8974_socdev = socdev;
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#if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
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if (setup->i2c_address) {
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normal_i2c[0] = setup->i2c_address;
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codec->hw_write = (hw_write_t)i2c_master_send;
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ret = i2c_add_driver(&wm8974_i2c_driver);
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if (ret != 0)
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printk(KERN_ERR "can't add i2c driver");
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}
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#else
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/* Add other interfaces here */
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#endif
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return ret;
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}
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@ -802,17 +666,9 @@ static int wm8974_probe(struct platform_device *pdev)
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static int wm8974_remove(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec = socdev->card->codec;
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if (codec->control_data)
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wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
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snd_soc_free_pcms(socdev);
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snd_soc_dapm_free(socdev);
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#if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
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i2c_del_driver(&wm8974_i2c_driver);
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#endif
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kfree(codec);
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return 0;
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}
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@ -825,15 +681,124 @@ struct snd_soc_codec_device soc_codec_dev_wm8974 = {
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};
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EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974);
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static __devinit int wm8974_register(struct wm8974_priv *wm8974)
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{
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int ret;
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struct snd_soc_codec *codec = &wm8974->codec;
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if (wm8974_codec) {
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dev_err(codec->dev, "Another WM8974 is registered\n");
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return -EINVAL;
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}
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mutex_init(&codec->mutex);
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INIT_LIST_HEAD(&codec->dapm_widgets);
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INIT_LIST_HEAD(&codec->dapm_paths);
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codec->private_data = wm8974;
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codec->name = "WM8974";
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codec->owner = THIS_MODULE;
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codec->read = wm8974_read_reg_cache;
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codec->write = wm8974_write;
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codec->bias_level = SND_SOC_BIAS_OFF;
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codec->set_bias_level = wm8974_set_bias_level;
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codec->dai = &wm8974_dai;
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codec->num_dai = 1;
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codec->reg_cache_size = WM8974_CACHEREGNUM;
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codec->reg_cache = &wm8974->reg_cache;
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memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg));
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ret = wm8974_reset(codec);
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if (ret < 0) {
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dev_err(codec->dev, "Failed to issue reset\n");
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return ret;
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}
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wm8974_dai.dev = codec->dev;
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wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
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wm8974_codec = codec;
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ret = snd_soc_register_codec(codec);
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if (ret != 0) {
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dev_err(codec->dev, "Failed to register codec: %d\n", ret);
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return ret;
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}
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ret = snd_soc_register_dai(&wm8974_dai);
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if (ret != 0) {
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dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
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snd_soc_unregister_codec(codec);
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return ret;
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}
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return 0;
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}
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static __devexit void wm8974_unregister(struct wm8974_priv *wm8974)
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{
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wm8974_set_bias_level(&wm8974->codec, SND_SOC_BIAS_OFF);
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snd_soc_unregister_dai(&wm8974_dai);
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snd_soc_unregister_codec(&wm8974->codec);
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kfree(wm8974);
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wm8974_codec = NULL;
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}
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static __devinit int wm8974_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct wm8974_priv *wm8974;
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struct snd_soc_codec *codec;
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wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL);
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if (wm8974 == NULL)
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return -ENOMEM;
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codec = &wm8974->codec;
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codec->hw_write = (hw_write_t)i2c_master_send;
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i2c_set_clientdata(i2c, wm8974);
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codec->control_data = i2c;
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codec->dev = &i2c->dev;
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return wm8974_register(wm8974);
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}
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static __devexit int wm8974_i2c_remove(struct i2c_client *client)
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{
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struct wm8974_priv *wm8974 = i2c_get_clientdata(client);
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wm8974_unregister(wm8974);
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return 0;
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}
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static const struct i2c_device_id wm8974_i2c_id[] = {
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{ "wm8974", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
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static struct i2c_driver wm8974_i2c_driver = {
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.driver = {
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.name = "WM8974 I2C Codec",
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.owner = THIS_MODULE,
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},
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.probe = wm8974_i2c_probe,
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.remove = __devexit_p(wm8974_i2c_remove),
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.id_table = wm8974_i2c_id,
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};
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static int __init wm8974_modinit(void)
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{
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return snd_soc_register_dai(&wm8974_dai);
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return i2c_add_driver(&wm8974_i2c_driver);
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}
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module_init(wm8974_modinit);
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static void __exit wm8974_exit(void)
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{
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snd_soc_unregister_dai(&wm8974_dai);
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i2c_del_driver(&wm8974_i2c_driver);
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}
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module_exit(wm8974_exit);
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@ -93,11 +93,6 @@
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#define WM8974_MCLKDIV_8 (6 << 5)
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#define WM8974_MCLKDIV_12 (7 << 5)
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struct wm8974_setup_data {
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unsigned short i2c_address;
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};
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extern struct snd_soc_dai wm8974_dai;
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extern struct snd_soc_codec_device soc_codec_dev_wm8974;
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