Register the WM8750 as a SPI or I2C device. This patch mostly shuffles code
around. Hugely inspired by WM8753 which was already converted.
Signed-off-by: Marek Vasut <marek.vasut(a)gmail.com>
---
sound/soc/codecs/wm8750.c | 411 +++++++++++++++++++++++++--------------------
1 files changed, 232 insertions(+), 179 deletions(-)
diff --git a/sound/soc/codecs/wm8750.c b/sound/soc/codecs/wm8750.c
index 475c67a..c7ee6d2 100644
--- a/sound/soc/codecs/wm8750.c
+++ b/sound/soc/codecs/wm8750.c
@@ -29,13 +29,6 @@
#include "wm8750.h"
-#define WM8750_VERSION "0.12"
-
-/* codec private data */
-struct wm8750_priv {
- unsigned int sysclk;
-};
-
/*
* wm8750 register cache
* We can't read the WM8750 register space when we
@@ -55,6 +48,59 @@ static const u16 wm8750_reg[] = {
0x0079, 0x0079, 0x0079, /* 40 */
};
+/* codec private data */
+struct wm8750_priv {
+ unsigned int sysclk;
+ struct snd_soc_codec codec;
+ u16 reg_cache[ARRAY_SIZE(wm8750_reg)];
+};
+
+/*
+ * read wm8750 register cache
+ */
+static inline unsigned int wm8750_read_reg_cache(struct snd_soc_codec *codec,
+ unsigned int reg)
+{
+ u16 *cache = codec->reg_cache;
+ if (reg < 1 || reg >= (ARRAY_SIZE(wm8750_reg) + 1))
+ return -1;
+ return cache[reg - 1];
+}
+
+/*
+ * write wm8750 register cache
+ */
+static inline void wm8750_write_reg_cache(struct snd_soc_codec *codec,
+ unsigned int reg, unsigned int value)
+{
+ u16 *cache = codec->reg_cache;
+ if (reg < 1 || reg >= (ARRAY_SIZE(wm8750_reg) + 1))
+ return;
+ cache[reg - 1] = value;
+}
+
+/*
+ * write to the WM8750 register space
+ */
+static int wm8750_write(struct snd_soc_codec *codec, unsigned int reg,
+ unsigned int value)
+{
+ u8 data[2];
+
+ /* data is
+ * D15..D9 WM8750 register offset
+ * D8...D0 register data
+ */
+ data[0] = (reg << 1) | ((value >> 8) & 0x0001);
+ data[1] = value & 0x00ff;
+
+ wm8750_write_reg_cache(codec, reg, value);
+ if (codec->hw_write(codec->control_data, data, 2) == 2)
+ return 0;
+ else
+ return -EIO;
+}
+
#define wm8750_reset(c) snd_soc_write(c, WM8750_RESET, 0)
/*
@@ -688,6 +734,11 @@ static int wm8750_resume(struct platform_device *pdev)
for (i = 0; i < ARRAY_SIZE(wm8750_reg); i++) {
if (i == WM8750_RESET)
continue;
+
+ /* No point in writing hardware default values back */
+ if (cache[i] == wm8750_reg[i])
+ continue;
+
data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
data[1] = cache[i] & 0x00ff;
codec->hw_write(codec->control_data, data, 2);
@@ -706,31 +757,111 @@ static int wm8750_resume(struct platform_device *pdev)
return 0;
}
+static struct snd_soc_codec *wm8750_codec;
+
+static int wm8750_probe(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec;
+ int ret = 0;
+
+ if (!wm8750_codec) {
+ dev_err(&pdev->dev, "WM8750 codec not yet registered\n");
+ return -EINVAL;
+ }
+
+ socdev->card->codec = wm8750_codec;
+ codec = wm8750_codec;
+
+ /* register pcms */
+ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
+ if (ret < 0) {
+ printk(KERN_ERR "wm8750: failed to create pcms\n");
+ goto err;
+ }
+
+ snd_soc_add_controls(codec, wm8750_snd_controls,
+ ARRAY_SIZE(wm8750_snd_controls));
+ wm8750_add_widgets(codec);
+
+ return 0;
+
+err:
+ return ret;
+}
+
+/*
+ * This function forces any delayed work to be queued and run.
+ */
+static int run_delayed_work(struct delayed_work *dwork)
+{
+ int ret;
+
+ /* cancel any work waiting to be queued. */
+ ret = cancel_delayed_work(dwork);
+
+ /* if there was any work waiting then we run it now and
+ * wait for it's completion */
+ if (ret) {
+ schedule_delayed_work(dwork, 0);
+ flush_scheduled_work();
+ }
+ return ret;
+}
+
+/* power down chip */
+static int wm8750_remove(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+
+ snd_soc_free_pcms(socdev);
+ snd_soc_dapm_free(socdev);
+
+ return 0;
+}
+
+struct snd_soc_codec_device soc_codec_dev_wm8750 = {
+ .probe = wm8750_probe,
+ .remove = wm8750_remove,
+ .suspend = wm8750_suspend,
+ .resume = wm8750_resume,
+};
+EXPORT_SYMBOL_GPL(soc_codec_dev_wm8750);
+
/*
* initialise the WM8750 driver
* register the mixer and dsp interfaces with the kernel
*/
-static int wm8750_init(struct snd_soc_device *socdev,
- enum snd_soc_control_type control)
+static int wm8750_register(struct wm8750_priv *wm8750)
{
- struct snd_soc_codec *codec = socdev->card->codec;
+ struct snd_soc_codec *codec = &wm8750->codec;
int reg, ret = 0;
+ if (wm8750_codec) {
+ dev_err(codec->dev, "Multiple WM8750 devices not supported\n");
+ ret = -EINVAL;
+ goto err;
+ }
+
+ mutex_init(&codec->mutex);
+ INIT_LIST_HEAD(&codec->dapm_widgets);
+ INIT_LIST_HEAD(&codec->dapm_paths);
+
codec->name = "WM8750";
codec->owner = THIS_MODULE;
+ codec->read = wm8750_read_reg_cache;
+ codec->write = wm8750_write;
+ codec->bias_level = SND_SOC_BIAS_STANDBY;
codec->set_bias_level = wm8750_set_bias_level;
codec->dai = &wm8750_dai;
codec->num_dai = 1;
- codec->reg_cache_size = ARRAY_SIZE(wm8750_reg);
- codec->reg_cache = kmemdup(wm8750_reg, sizeof(wm8750_reg), GFP_KERNEL);
- if (codec->reg_cache == NULL)
- return -ENOMEM;
+ codec->private_data = wm8750;
+ codec->reg_cache_size = ARRAY_SIZE(wm8750->reg_cache) + 1;
+ codec->reg_cache = &wm8750->reg_cache;
+ codec->private_data = wm8750;
- ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
- if (ret < 0) {
- printk(KERN_ERR "wm8750: failed to set cache I/O: %d\n", ret);
- goto err;
- }
+ memcpy(codec->reg_cache, wm8750_reg, sizeof(wm8750->reg_cache));
+ INIT_DELAYED_WORK(&codec->delayed_work, wm8750_work);
ret = wm8750_reset(codec);
if (ret < 0) {
@@ -738,13 +869,6 @@ static int wm8750_init(struct snd_soc_device *socdev,
goto err;
}
- /* register pcms */
- ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
- if (ret < 0) {
- printk(KERN_ERR "wm8750: failed to create pcms\n");
- goto err;
- }
-
/* charge output caps */
wm8750_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
codec->bias_level = SND_SOC_BIAS_STANDBY;
@@ -768,19 +892,39 @@ static int wm8750_init(struct snd_soc_device *socdev,
reg = snd_soc_read(codec, WM8750_RINVOL);
snd_soc_write(codec, WM8750_RINVOL, reg | 0x0100);
- snd_soc_add_controls(codec, wm8750_snd_controls,
- ARRAY_SIZE(wm8750_snd_controls));
- wm8750_add_widgets(codec);
- return ret;
+ wm8750_codec = codec;
+
+ ret = snd_soc_register_codec(codec);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to register codec: %d\n", ret);
+ goto err;
+ }
+
+ ret = snd_soc_register_dais(&wm8750_dai, 1);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to register DAIs: %d\n", ret);
+ goto err_codec;
+ }
+
+ return 0;
+err_codec:
+ run_delayed_work(&codec->delayed_work);
+ snd_soc_unregister_codec(codec);
err:
- kfree(codec->reg_cache);
+ kfree(wm8750);
return ret;
}
-/* If the i2c layer weren't so broken, we could pass this kind of data
- around */
-static struct snd_soc_device *wm8750_socdev;
+static void wm8750_unregister(struct wm8750_priv *wm8750)
+{
+ wm8750_set_bias_level(&wm8750->codec, SND_SOC_BIAS_OFF);
+ run_delayed_work(&wm8750->codec.delayed_work);
+ snd_soc_unregister_dais(&wm8750_dai, 1);
+ snd_soc_unregister_codec(&wm8750->codec);
+ kfree(wm8750);
+ wm8750_codec = NULL;
+}
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
@@ -794,24 +938,27 @@ static struct snd_soc_device *wm8750_socdev;
static int wm8750_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
- struct snd_soc_device *socdev = wm8750_socdev;
- struct snd_soc_codec *codec = socdev->card->codec;
- int ret;
+ struct snd_soc_codec *codec;
+ struct wm8750_priv *wm8750;
- i2c_set_clientdata(i2c, codec);
- codec->control_data = i2c;
+ wm8750 = kzalloc(sizeof(struct wm8750_priv), GFP_KERNEL);
+ if (wm8750 == NULL)
+ return -ENOMEM;
- ret = wm8750_init(socdev, SND_SOC_I2C);
- if (ret < 0)
- pr_err("failed to initialise WM8750\n");
+ codec = &wm8750->codec;
+ codec->hw_write = (hw_write_t)i2c_master_send;
+ codec->control_data = i2c;
+ i2c_set_clientdata(i2c, wm8750);
- return ret;
+ codec->dev = &i2c->dev;
+
+ return wm8750_register(wm8750);
}
static int wm8750_i2c_remove(struct i2c_client *client)
{
- struct snd_soc_codec *codec = i2c_get_clientdata(client);
- kfree(codec->reg_cache);
+ struct wm8750_priv *wm8750 = i2c_get_clientdata(client);
+ wm8750_unregister(wm8750);
return 0;
}
@@ -830,66 +977,56 @@ static struct i2c_driver wm8750_i2c_driver = {
.remove = wm8750_i2c_remove,
.id_table = wm8750_i2c_id,
};
+#endif
-static int wm8750_add_i2c_device(struct platform_device *pdev,
- const struct wm8750_setup_data *setup)
+#if defined(CONFIG_SPI_MASTER)
+static int wm8750_spi_write(struct spi_device *spi, const char *data, int len)
{
- struct i2c_board_info info;
- struct i2c_adapter *adapter;
- struct i2c_client *client;
- int ret;
+ struct spi_transfer t;
+ struct spi_message m;
+ u8 msg[2];
- ret = i2c_add_driver(&wm8750_i2c_driver);
- if (ret != 0) {
- dev_err(&pdev->dev, "can't add i2c driver\n");
- return ret;
- }
+ if (len <= 0)
+ return 0;
- memset(&info, 0, sizeof(struct i2c_board_info));
- info.addr = setup->i2c_address;
- strlcpy(info.type, "wm8750", I2C_NAME_SIZE);
+ msg[0] = data[0];
+ msg[1] = data[1];
- 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;
- }
+ spi_message_init(&m);
+ memset(&t, 0, (sizeof t));
- 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;
- }
+ t.tx_buf = &msg[0];
+ t.len = len;
- return 0;
+ spi_message_add_tail(&t, &m);
+ spi_sync(spi, &m);
-err_driver:
- i2c_del_driver(&wm8750_i2c_driver);
- return -ENODEV;
+ return len;
}
-#endif
-#if defined(CONFIG_SPI_MASTER)
static int __devinit wm8750_spi_probe(struct spi_device *spi)
{
- struct snd_soc_device *socdev = wm8750_socdev;
- struct snd_soc_codec *codec = socdev->card->codec;
- int ret;
+ struct snd_soc_codec *codec;
+ struct wm8750_priv *wm8750;
+
+ wm8750 = kzalloc(sizeof(struct wm8750_priv), GFP_KERNEL);
+ if (wm8750 == NULL)
+ return -ENOMEM;
+ codec = &wm8750->codec;
+ codec->hw_write = (hw_write_t)wm8750_spi_write;
codec->control_data = spi;
+ codec->dev = &spi->dev;
- ret = wm8750_init(socdev, SND_SOC_SPI);
- if (ret < 0)
- dev_err(&spi->dev, "failed to initialise WM8750\n");
+ dev_set_drvdata(&spi->dev, wm8750);
- return ret;
+ return wm8750_register(wm8750);
}
static int __devexit wm8750_spi_remove(struct spi_device *spi)
{
+ struct wm8750_priv *wm8750 = dev_get_drvdata(&spi->dev);
+ wm8750_unregister(wm8750);
return 0;
}
@@ -904,115 +1041,31 @@ static struct spi_driver wm8750_spi_driver = {
};
#endif
-static int wm8750_probe(struct platform_device *pdev)
+static int __init wm8750_modinit(void)
{
- struct snd_soc_device *socdev = platform_get_drvdata(pdev);
- struct wm8750_setup_data *setup = socdev->codec_data;
- struct snd_soc_codec *codec;
- struct wm8750_priv *wm8750;
int ret;
-
- pr_info("WM8750 Audio Codec %s", WM8750_VERSION);
- codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
- if (codec == NULL)
- return -ENOMEM;
-
- wm8750 = kzalloc(sizeof(struct wm8750_priv), GFP_KERNEL);
- if (wm8750 == NULL) {
- kfree(codec);
- return -ENOMEM;
- }
-
- codec->private_data = wm8750;
- socdev->card->codec = codec;
- mutex_init(&codec->mutex);
- INIT_LIST_HEAD(&codec->dapm_widgets);
- INIT_LIST_HEAD(&codec->dapm_paths);
- wm8750_socdev = socdev;
- INIT_DELAYED_WORK(&codec->delayed_work, wm8750_work);
-
- ret = -ENODEV;
-
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
- if (setup->i2c_address) {
- ret = wm8750_add_i2c_device(pdev, setup);
- }
+ ret = i2c_add_driver(&wm8750_i2c_driver);
+ if (ret != 0)
+ pr_err("Failed to register WM8750 I2C driver: %d\n", ret);
#endif
#if defined(CONFIG_SPI_MASTER)
- if (setup->spi) {
- ret = spi_register_driver(&wm8750_spi_driver);
- if (ret != 0)
- printk(KERN_ERR "can't add spi driver");
- }
+ ret = spi_register_driver(&wm8750_spi_driver);
+ if (ret != 0)
+ pr_err("Failed to register WM8750 SPI driver: %d\n", ret);
#endif
-
- if (ret != 0) {
- kfree(codec->private_data);
- kfree(codec);
- }
- return ret;
-}
-
-/*
- * This function forces any delayed work to be queued and run.
- */
-static int run_delayed_work(struct delayed_work *dwork)
-{
- int ret;
-
- /* cancel any work waiting to be queued. */
- ret = cancel_delayed_work(dwork);
-
- /* if there was any work waiting then we run it now and
- * wait for it's completion */
- if (ret) {
- schedule_delayed_work(dwork, 0);
- flush_scheduled_work();
- }
- return ret;
+ return 0;
}
+module_init(wm8750_modinit);
-/* power down chip */
-static int wm8750_remove(struct platform_device *pdev)
+static void __exit wm8750_exit(void)
{
- struct snd_soc_device *socdev = platform_get_drvdata(pdev);
- struct snd_soc_codec *codec = socdev->card->codec;
-
- if (codec->control_data)
- wm8750_set_bias_level(codec, SND_SOC_BIAS_OFF);
- run_delayed_work(&codec->delayed_work);
- 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(&wm8750_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
spi_unregister_driver(&wm8750_spi_driver);
#endif
- kfree(codec->private_data);
- kfree(codec);
-
- return 0;
-}
-
-struct snd_soc_codec_device soc_codec_dev_wm8750 = {
- .probe = wm8750_probe,
- .remove = wm8750_remove,
- .suspend = wm8750_suspend,
- .resume = wm8750_resume,
-};
-EXPORT_SYMBOL_GPL(soc_codec_dev_wm8750);
-
-static int __init wm8750_modinit(void)
-{
- return snd_soc_register_dai(&wm8750_dai);
-}
-module_init(wm8750_modinit);
-
-static void __exit wm8750_exit(void)
-{
- snd_soc_unregister_dai(&wm8750_dai);
}
module_exit(wm8750_exit);
--
1.7.0
