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 --- sound/soc/codecs/wm8903.c | 230 +++++++++++++++++++-------------------------- sound/soc/codecs/wm8903.h | 5 - 2 files changed, 97 insertions(+), 138 deletions(-)
diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c index b1f5cf7..c80968f 100644 --- a/sound/soc/codecs/wm8903.c +++ b/sound/soc/codecs/wm8903.c @@ -33,19 +33,6 @@
#include "wm8903.h"
-struct wm8903_priv { - int sysclk; - - /* Reference counts */ - int charge_pump_users; - int class_w_users; - int playback_active; - int capture_active; - - struct snd_pcm_substream *master_substream; - struct snd_pcm_substream *slave_substream; -}; - /* Register defaults at reset */ static u16 wm8903_reg_defaults[] = { 0x8903, /* R0 - SW Reset and ID */ @@ -223,6 +210,23 @@ static u16 wm8903_reg_defaults[] = { 0x0000, /* R172 - Analogue Output Bias 0 */ };
+struct wm8903_priv { + struct snd_soc_codec codec; + u16 reg_cache[ARRAY_SIZE(wm8903_reg_defaults)]; + + int sysclk; + + /* Reference counts */ + int charge_pump_users; + int class_w_users; + int playback_active; + int capture_active; + + struct snd_pcm_substream *master_substream; + struct snd_pcm_substream *slave_substream; +}; + + static unsigned int wm8903_read_reg_cache(struct snd_soc_codec *codec, unsigned int reg) { @@ -360,6 +364,8 @@ static void wm8903_sync_reg_cache(struct snd_soc_codec *codec, u16 *cache) static void wm8903_reset(struct snd_soc_codec *codec) { wm8903_write(codec, WM8903_SW_RESET_AND_ID, 0); + memcpy(codec->reg_cache, wm8903_reg_defaults, + sizeof(wm8903_reg_defaults)); }
#define WM8903_OUTPUT_SHORT 0x8 @@ -1563,39 +1569,48 @@ static int wm8903_resume(struct platform_device *pdev) return 0; }
-/* - * initialise the WM8903 driver - * register the mixer and dsp interfaces with the kernel - */ -static int wm8903_init(struct snd_soc_device *socdev) +static struct snd_soc_codec *wm8903_codec; + +static int wm8903_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) { - struct snd_soc_codec *codec = socdev->codec; - struct i2c_client *i2c = codec->control_data; - int ret = 0; + struct wm8903_priv *wm8903; + struct snd_soc_codec *codec; + int ret; u16 val;
- val = wm8903_hw_read(codec, WM8903_SW_RESET_AND_ID); - if (val != wm8903_reg_defaults[WM8903_SW_RESET_AND_ID]) { - dev_err(&i2c->dev, - "Device with ID register %x is not a WM8903\n", val); - return -ENODEV; - } + wm8903 = kzalloc(sizeof(struct wm8903_priv), GFP_KERNEL); + if (wm8903 == NULL) + return -ENOMEM;
+ codec = &wm8903->codec; + + mutex_init(&codec->mutex); + INIT_LIST_HEAD(&codec->dapm_widgets); + INIT_LIST_HEAD(&codec->dapm_paths); + + codec->dev = &i2c->dev; codec->name = "WM8903"; codec->owner = THIS_MODULE; codec->read = wm8903_read; codec->write = wm8903_write; + codec->hw_write = (hw_write_t)i2c_master_send; codec->bias_level = SND_SOC_BIAS_OFF; codec->set_bias_level = wm8903_set_bias_level; codec->dai = &wm8903_dai; codec->num_dai = 1; - codec->reg_cache_size = ARRAY_SIZE(wm8903_reg_defaults); - codec->reg_cache = kmemdup(wm8903_reg_defaults, - sizeof(wm8903_reg_defaults), - GFP_KERNEL); - if (codec->reg_cache == NULL) { - dev_err(&i2c->dev, "Failed to allocate register cache\n"); - return -ENOMEM; + codec->reg_cache_size = ARRAY_SIZE(wm8903->reg_cache); + codec->reg_cache = &wm8903->reg_cache[0]; + codec->private_data = wm8903; + + i2c_set_clientdata(i2c, codec); + codec->control_data = i2c; + + val = wm8903_hw_read(codec, WM8903_SW_RESET_AND_ID); + if (val != wm8903_reg_defaults[WM8903_SW_RESET_AND_ID]) { + dev_err(&i2c->dev, + "Device with ID register %x is not a WM8903\n", val); + return -ENODEV; }
val = wm8903_read(codec, WM8903_REVISION_NUMBER); @@ -1604,13 +1619,6 @@ static int wm8903_init(struct snd_soc_device *socdev)
wm8903_reset(codec);
- /* register pcms */ - ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); - if (ret < 0) { - dev_err(&i2c->dev, "failed to create pcms\n"); - goto pcm_err; - } - /* SYSCLK is required for pretty much anything */ wm8903_write(codec, WM8903_CLOCK_RATES_2, WM8903_CLK_SYS_ENA);
@@ -1648,47 +1656,45 @@ static int wm8903_init(struct snd_soc_device *socdev) val |= WM8903_DAC_MUTEMODE; wm8903_write(codec, WM8903_DAC_DIGITAL_1, val);
- wm8903_add_controls(codec); - wm8903_add_widgets(codec); - ret = snd_soc_init_card(socdev); - if (ret < 0) { - dev_err(&i2c->dev, "wm8903: failed to register card\n"); - goto card_err; + wm8903_dai.dev = &i2c->dev; + wm8903_codec = codec; + + ret = snd_soc_register_codec(codec); + if (ret != 0) { + dev_err(&i2c->dev, "Failed to register codec: %d\n", ret); + goto err; + } + + ret = snd_soc_register_dai(&wm8903_dai); + if (ret != 0) { + dev_err(&i2c->dev, "Failed to register DAI: %d\n", ret); + goto err_codec; }
return ret;
-card_err: - snd_soc_free_pcms(socdev); - snd_soc_dapm_free(socdev); -pcm_err: - kfree(codec->reg_cache); +err_codec: + snd_soc_unregister_codec(codec); +err: + wm8903_codec = NULL; + kfree(wm8903); return ret; }
-static struct snd_soc_device *wm8903_socdev; - -static int wm8903_i2c_probe(struct i2c_client *i2c, - const struct i2c_device_id *id) +static int wm8903_i2c_remove(struct i2c_client *client) { - struct snd_soc_device *socdev = wm8903_socdev; - struct snd_soc_codec *codec = socdev->codec; - int ret; + struct snd_soc_codec *codec = i2c_get_clientdata(client);
- i2c_set_clientdata(i2c, codec); - codec->control_data = i2c; + snd_soc_unregister_dai(&wm8903_dai); + snd_soc_unregister_codec(codec);
- ret = wm8903_init(socdev); - if (ret < 0) - dev_err(&i2c->dev, "Device initialisation failed\n"); + wm8903_set_bias_level(codec, SND_SOC_BIAS_OFF);
- return ret; -} + kfree(codec->private_data); + + wm8903_codec = NULL; + wm8903_dai.dev = NULL;
-static int wm8903_i2c_remove(struct i2c_client *client) -{ - struct snd_soc_codec *codec = i2c_get_clientdata(client); - kfree(codec->reg_cache); return 0; }
@@ -1712,75 +1718,37 @@ static struct i2c_driver wm8903_i2c_driver = { static int wm8903_probe(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); - struct wm8903_setup_data *setup; - struct snd_soc_codec *codec; - struct wm8903_priv *wm8903; - struct i2c_board_info board_info; - struct i2c_adapter *adapter; - struct i2c_client *i2c_client; int ret = 0;
- setup = socdev->codec_data; - - if (!setup->i2c_address) { - dev_err(&pdev->dev, "No codec address provided\n"); - return -ENODEV; + if (!wm8903_codec) { + dev_err(&pdev->dev, "I2C device not yet probed\n"); + goto err; }
- codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); - if (codec == NULL) - return -ENOMEM; + socdev->codec = wm8903_codec;
- wm8903 = kzalloc(sizeof(struct wm8903_priv), GFP_KERNEL); - if (wm8903 == NULL) { - ret = -ENOMEM; - goto err_codec; + /* register pcms */ + ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); + if (ret < 0) { + dev_err(&pdev->dev, "failed to create pcms\n"); + goto err; }
- codec->private_data = wm8903; - socdev->codec = codec; - mutex_init(&codec->mutex); - INIT_LIST_HEAD(&codec->dapm_widgets); - INIT_LIST_HEAD(&codec->dapm_paths); + wm8903_add_controls(socdev->codec); + wm8903_add_widgets(socdev->codec);
- wm8903_socdev = socdev; - - codec->hw_write = (hw_write_t)i2c_master_send; - ret = i2c_add_driver(&wm8903_i2c_driver); - if (ret != 0) { - dev_err(&pdev->dev, "can't add i2c driver\n"); - goto err_priv; - } else { - memset(&board_info, 0, sizeof(board_info)); - strlcpy(board_info.type, "wm8903", I2C_NAME_SIZE); - board_info.addr = setup->i2c_address; - - adapter = i2c_get_adapter(setup->i2c_bus); - if (!adapter) { - dev_err(&pdev->dev, "Can't get I2C bus %d\n", - setup->i2c_bus); - ret = -ENODEV; - goto err_adapter; - } - - i2c_client = i2c_new_device(adapter, &board_info); - i2c_put_adapter(adapter); - if (i2c_client == NULL) { - dev_err(&pdev->dev, - "I2C driver registration failed\n"); - ret = -ENODEV; - goto err_adapter; - } + ret = snd_soc_init_card(socdev); + if (ret < 0) { + dev_err(&pdev->dev, "wm8903: failed to register card\n"); + goto card_err; }
return ret;
-err_adapter: - i2c_del_driver(&wm8903_i2c_driver); -err_priv: - kfree(codec->private_data); -err_codec: - kfree(codec); +card_err: + snd_soc_free_pcms(socdev); + snd_soc_dapm_free(socdev); +err: return ret; }
@@ -1795,10 +1763,6 @@ static int wm8903_remove(struct platform_device *pdev)
snd_soc_free_pcms(socdev); snd_soc_dapm_free(socdev); - i2c_unregister_device(socdev->codec->control_data); - i2c_del_driver(&wm8903_i2c_driver); - kfree(codec->private_data); - kfree(codec);
return 0; } @@ -1813,13 +1777,13 @@ EXPORT_SYMBOL_GPL(soc_codec_dev_wm8903);
static int __init wm8903_modinit(void) { - return snd_soc_register_dai(&wm8903_dai); + return i2c_add_driver(&wm8903_i2c_driver); } module_init(wm8903_modinit);
static void __exit wm8903_exit(void) { - snd_soc_unregister_dai(&wm8903_dai); + i2c_del_driver(&wm8903_i2c_driver); } module_exit(wm8903_exit);
diff --git a/sound/soc/codecs/wm8903.h b/sound/soc/codecs/wm8903.h index cec622f..0ea27e2 100644 --- a/sound/soc/codecs/wm8903.h +++ b/sound/soc/codecs/wm8903.h @@ -18,11 +18,6 @@ extern struct snd_soc_dai wm8903_dai; extern struct snd_soc_codec_device soc_codec_dev_wm8903;
-struct wm8903_setup_data { - int i2c_bus; - int i2c_address; -}; - #define WM8903_MCLK_DIV_2 1 #define WM8903_CLK_SYS 2 #define WM8903_BCLK 3