mirror of https://gitee.com/openkylin/linux.git
ASoC: Convert WM8903 driver to register at I2C probe time
The driver now registers the codec and DAI when probed as an I2C device. Also convert the driver to use a single dynamic allocation to simplify error handling. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown
parent
78e19a39d3
commit
d58d5d5567
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@ -33,19 +33,6 @@
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#include "wm8903.h"
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struct wm8903_priv {
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int sysclk;
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/* Reference counts */
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int charge_pump_users;
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int class_w_users;
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int playback_active;
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int capture_active;
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struct snd_pcm_substream *master_substream;
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struct snd_pcm_substream *slave_substream;
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};
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/* Register defaults at reset */
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static u16 wm8903_reg_defaults[] = {
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0x8903, /* R0 - SW Reset and ID */
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@ -223,6 +210,23 @@ static u16 wm8903_reg_defaults[] = {
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0x0000, /* R172 - Analogue Output Bias 0 */
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};
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struct wm8903_priv {
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struct snd_soc_codec codec;
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u16 reg_cache[ARRAY_SIZE(wm8903_reg_defaults)];
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int sysclk;
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/* Reference counts */
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int charge_pump_users;
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int class_w_users;
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int playback_active;
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int capture_active;
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struct snd_pcm_substream *master_substream;
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struct snd_pcm_substream *slave_substream;
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};
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static unsigned int wm8903_read_reg_cache(struct snd_soc_codec *codec,
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unsigned int reg)
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{
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@ -360,6 +364,8 @@ static void wm8903_sync_reg_cache(struct snd_soc_codec *codec, u16 *cache)
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static void wm8903_reset(struct snd_soc_codec *codec)
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{
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wm8903_write(codec, WM8903_SW_RESET_AND_ID, 0);
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memcpy(codec->reg_cache, wm8903_reg_defaults,
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sizeof(wm8903_reg_defaults));
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}
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#define WM8903_OUTPUT_SHORT 0x8
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@ -1563,17 +1569,43 @@ static int wm8903_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 WM8903 driver
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* register the mixer and dsp interfaces with the kernel
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*/
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static int wm8903_init(struct snd_soc_device *socdev)
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static struct snd_soc_codec *wm8903_codec;
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static int wm8903_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 snd_soc_codec *codec = socdev->codec;
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struct i2c_client *i2c = codec->control_data;
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int ret = 0;
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struct wm8903_priv *wm8903;
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struct snd_soc_codec *codec;
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int ret;
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u16 val;
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wm8903 = kzalloc(sizeof(struct wm8903_priv), GFP_KERNEL);
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if (wm8903 == NULL)
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return -ENOMEM;
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codec = &wm8903->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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codec->dev = &i2c->dev;
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codec->name = "WM8903";
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codec->owner = THIS_MODULE;
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codec->read = wm8903_read;
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codec->write = wm8903_write;
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codec->hw_write = (hw_write_t)i2c_master_send;
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codec->bias_level = SND_SOC_BIAS_OFF;
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codec->set_bias_level = wm8903_set_bias_level;
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codec->dai = &wm8903_dai;
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codec->num_dai = 1;
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codec->reg_cache_size = ARRAY_SIZE(wm8903->reg_cache);
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codec->reg_cache = &wm8903->reg_cache[0];
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codec->private_data = wm8903;
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i2c_set_clientdata(i2c, codec);
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codec->control_data = i2c;
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val = wm8903_hw_read(codec, WM8903_SW_RESET_AND_ID);
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if (val != wm8903_reg_defaults[WM8903_SW_RESET_AND_ID]) {
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dev_err(&i2c->dev,
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@ -1581,36 +1613,12 @@ static int wm8903_init(struct snd_soc_device *socdev)
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return -ENODEV;
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}
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codec->name = "WM8903";
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codec->owner = THIS_MODULE;
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codec->read = wm8903_read;
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codec->write = wm8903_write;
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codec->bias_level = SND_SOC_BIAS_OFF;
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codec->set_bias_level = wm8903_set_bias_level;
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codec->dai = &wm8903_dai;
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codec->num_dai = 1;
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codec->reg_cache_size = ARRAY_SIZE(wm8903_reg_defaults);
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codec->reg_cache = kmemdup(wm8903_reg_defaults,
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sizeof(wm8903_reg_defaults),
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GFP_KERNEL);
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if (codec->reg_cache == NULL) {
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dev_err(&i2c->dev, "Failed to allocate register cache\n");
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return -ENOMEM;
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}
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val = wm8903_read(codec, WM8903_REVISION_NUMBER);
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dev_info(&i2c->dev, "WM8903 revision %d\n",
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val & WM8903_CHIP_REV_MASK);
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wm8903_reset(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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dev_err(&i2c->dev, "failed to create pcms\n");
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goto pcm_err;
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}
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/* SYSCLK is required for pretty much anything */
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wm8903_write(codec, WM8903_CLOCK_RATES_2, WM8903_CLK_SYS_ENA);
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@ -1648,47 +1656,45 @@ static int wm8903_init(struct snd_soc_device *socdev)
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val |= WM8903_DAC_MUTEMODE;
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wm8903_write(codec, WM8903_DAC_DIGITAL_1, val);
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wm8903_add_controls(codec);
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wm8903_add_widgets(codec);
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ret = snd_soc_init_card(socdev);
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if (ret < 0) {
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dev_err(&i2c->dev, "wm8903: failed to register card\n");
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goto card_err;
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wm8903_dai.dev = &i2c->dev;
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wm8903_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(&i2c->dev, "Failed to register codec: %d\n", ret);
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goto err;
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}
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ret = snd_soc_register_dai(&wm8903_dai);
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if (ret != 0) {
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dev_err(&i2c->dev, "Failed to register DAI: %d\n", ret);
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goto err_codec;
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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 *wm8903_socdev;
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static int wm8903_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 snd_soc_device *socdev = wm8903_socdev;
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struct snd_soc_codec *codec = socdev->codec;
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int ret;
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i2c_set_clientdata(i2c, codec);
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codec->control_data = i2c;
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ret = wm8903_init(socdev);
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if (ret < 0)
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dev_err(&i2c->dev, "Device initialisation failed\n");
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err_codec:
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snd_soc_unregister_codec(codec);
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err:
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wm8903_codec = NULL;
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kfree(wm8903);
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return ret;
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}
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static int wm8903_i2c_remove(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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kfree(codec->reg_cache);
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snd_soc_unregister_dai(&wm8903_dai);
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snd_soc_unregister_codec(codec);
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wm8903_set_bias_level(codec, SND_SOC_BIAS_OFF);
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kfree(codec->private_data);
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wm8903_codec = NULL;
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wm8903_dai.dev = NULL;
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return 0;
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}
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@ -1712,75 +1718,37 @@ static struct i2c_driver wm8903_i2c_driver = {
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static int wm8903_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 wm8903_setup_data *setup;
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struct snd_soc_codec *codec;
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struct wm8903_priv *wm8903;
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struct i2c_board_info board_info;
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struct i2c_adapter *adapter;
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struct i2c_client *i2c_client;
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int ret = 0;
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setup = socdev->codec_data;
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if (!setup->i2c_address) {
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dev_err(&pdev->dev, "No codec address provided\n");
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return -ENODEV;
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if (!wm8903_codec) {
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dev_err(&pdev->dev, "I2C device not yet probed\n");
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goto err;
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}
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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->codec = wm8903_codec;
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wm8903 = kzalloc(sizeof(struct wm8903_priv), GFP_KERNEL);
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if (wm8903 == NULL) {
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ret = -ENOMEM;
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goto err_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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dev_err(&pdev->dev, "failed to create pcms\n");
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goto err;
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}
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codec->private_data = wm8903;
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socdev->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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wm8903_add_controls(socdev->codec);
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wm8903_add_widgets(socdev->codec);
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wm8903_socdev = socdev;
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codec->hw_write = (hw_write_t)i2c_master_send;
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ret = i2c_add_driver(&wm8903_i2c_driver);
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if (ret != 0) {
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dev_err(&pdev->dev, "can't add i2c driver\n");
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goto err_priv;
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} else {
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memset(&board_info, 0, sizeof(board_info));
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strlcpy(board_info.type, "wm8903", I2C_NAME_SIZE);
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board_info.addr = setup->i2c_address;
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adapter = i2c_get_adapter(setup->i2c_bus);
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if (!adapter) {
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dev_err(&pdev->dev, "Can't get I2C bus %d\n",
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setup->i2c_bus);
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ret = -ENODEV;
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goto err_adapter;
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}
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i2c_client = i2c_new_device(adapter, &board_info);
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i2c_put_adapter(adapter);
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if (i2c_client == NULL) {
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dev_err(&pdev->dev,
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"I2C driver registration failed\n");
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ret = -ENODEV;
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goto err_adapter;
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}
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ret = snd_soc_init_card(socdev);
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if (ret < 0) {
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dev_err(&pdev->dev, "wm8903: failed to register card\n");
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goto card_err;
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}
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return ret;
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err_adapter:
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i2c_del_driver(&wm8903_i2c_driver);
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err_priv:
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kfree(codec->private_data);
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err_codec:
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kfree(codec);
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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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err:
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return ret;
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}
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@ -1795,10 +1763,6 @@ static int wm8903_remove(struct platform_device *pdev)
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snd_soc_free_pcms(socdev);
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snd_soc_dapm_free(socdev);
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i2c_unregister_device(socdev->codec->control_data);
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i2c_del_driver(&wm8903_i2c_driver);
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kfree(codec->private_data);
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kfree(codec);
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return 0;
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}
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@ -1813,13 +1777,13 @@ EXPORT_SYMBOL_GPL(soc_codec_dev_wm8903);
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static int __init wm8903_modinit(void)
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{
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return snd_soc_register_dai(&wm8903_dai);
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return i2c_add_driver(&wm8903_i2c_driver);
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}
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module_init(wm8903_modinit);
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static void __exit wm8903_exit(void)
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{
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snd_soc_unregister_dai(&wm8903_dai);
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i2c_del_driver(&wm8903_i2c_driver);
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}
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module_exit(wm8903_exit);
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@ -18,11 +18,6 @@
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extern struct snd_soc_dai wm8903_dai;
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extern struct snd_soc_codec_device soc_codec_dev_wm8903;
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struct wm8903_setup_data {
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int i2c_bus;
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int i2c_address;
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};
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#define WM8903_MCLK_DIV_2 1
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#define WM8903_CLK_SYS 2
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#define WM8903_BCLK 3
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