[2/2] tm6000: add extension

Message ID 1273508571-16472-2-git-send-email-stefan.ringel@arcor.de (mailing list archive)
State Superseded, archived
Headers

Commit Message

Stefan Ringel May 10, 2010, 4:22 p.m. UTC
  From: Stefan Ringel <stefan.ringel@arcor.de>

add extension
add module init over tm6000 extension


Signed-off-by: Stefan Ringel <stefan.ringel@arcor.de>
---
 drivers/staging/tm6000/tm6000-alsa.c  |   25 +++++++++-
 drivers/staging/tm6000/tm6000-cards.c |    7 +++
 drivers/staging/tm6000/tm6000-core.c  |   92 +++++++++++++++++++++++++++++++++
 drivers/staging/tm6000/tm6000.h       |   23 ++++++++-
 4 files changed, 145 insertions(+), 2 deletions(-)
  

Comments

Bee Hock Goh May 27, 2010, 3:21 p.m. UTC | #1
Stefan,

Did you have a kernel opps while loading the tm6000-alsa?

regards,
 Hock.

On Tue, May 11, 2010 at 12:22 AM,  <stefan.ringel@arcor.de> wrote:
> From: Stefan Ringel <stefan.ringel@arcor.de>
>
> add extension
> add module init over tm6000 extension
>
>
> Signed-off-by: Stefan Ringel <stefan.ringel@arcor.de>
> ---
>  drivers/staging/tm6000/tm6000-alsa.c  |   25 +++++++++-
>  drivers/staging/tm6000/tm6000-cards.c |    7 +++
>  drivers/staging/tm6000/tm6000-core.c  |   92 +++++++++++++++++++++++++++++++++
>  drivers/staging/tm6000/tm6000.h       |   23 ++++++++-
>  4 files changed, 145 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/staging/tm6000/tm6000-alsa.c b/drivers/staging/tm6000/tm6000-alsa.c
> index bc89f9d..ce081cd 100644
> --- a/drivers/staging/tm6000/tm6000-alsa.c
> +++ b/drivers/staging/tm6000/tm6000-alsa.c
> @@ -410,5 +410,28 @@ error:
>        snd_card_free(card);
>        return rc;
>  }
> -EXPORT_SYMBOL_GPL(tm6000_audio_init);
>
> +static int tm6000_audio_fini(struct tm6000_core *dev)
> +{
> +       return 0;
> +}
> +
> +struct tm6000_ops audio_ops = {
> +       .id     = TM6000_AUDIO,
> +       .name   = "TM6000 Audio Extension",
> +       .init   = tm6000_audio_init,
> +       .fini   = tm6000_audio_fini,
> +};
> +
> +static int __init tm6000_alsa_register(void)
> +{
> +       return tm6000_register_extension(&audio_ops);
> +}
> +
> +static void __exit tm6000_alsa_unregister(void)
> +{
> +       tm6000_unregister_extension(&audio_ops);
> +}
> +
> +module_init(tm6000_alsa_register);
> +module_exit(tm6000_alsa_unregister);
> diff --git a/drivers/staging/tm6000/tm6000-cards.c b/drivers/staging/tm6000/tm6000-cards.c
> index 9f6160b..33b134b 100644
> --- a/drivers/staging/tm6000/tm6000-cards.c
> +++ b/drivers/staging/tm6000/tm6000-cards.c
> @@ -692,6 +692,10 @@ static int tm6000_init_dev(struct tm6000_core *dev)
>        if (rc < 0)
>                goto err;
>
> +       tm6000_add_into_devlist(dev);
> +
> +       tm6000_init_extension(dev);
> +
>        if (dev->caps.has_dvb) {
>                dev->dvb = kzalloc(sizeof(*(dev->dvb)), GFP_KERNEL);
>                if (!dev->dvb) {
> @@ -931,6 +935,9 @@ static void tm6000_usb_disconnect(struct usb_interface *interface)
>
>        usb_put_dev(dev->udev);
>
> +       tm6000_remove_from_devlist(dev);
> +       tm6000_close_extension(dev);
> +
>        mutex_unlock(&dev->lock);
>        kfree(dev);
>  }
> diff --git a/drivers/staging/tm6000/tm6000-core.c b/drivers/staging/tm6000/tm6000-core.c
> index bfbc53b..1259ae5 100644
> --- a/drivers/staging/tm6000/tm6000-core.c
> +++ b/drivers/staging/tm6000/tm6000-core.c
> @@ -600,3 +600,95 @@ printk("Original value=%d\n",val);
>        return val;
>  }
>  EXPORT_SYMBOL_GPL(tm6000_set_audio_bitrate);
> +
> +static LIST_HEAD(tm6000_devlist);
> +static DEFINE_MUTEX(tm6000_devlist_mutex);
> +
> +/*
> + * tm6000_realease_resource()
> + */
> +
> +void tm6000_remove_from_devlist(struct tm6000_core *dev)
> +{
> +       mutex_lock(&tm6000_devlist_mutex);
> +       list_del(&dev->devlist);
> +       mutex_unlock(&tm6000_devlist_mutex);
> +};
> +
> +void tm6000_add_into_devlist(struct tm6000_core *dev)
> +{
> +       mutex_lock(&tm6000_devlist_mutex);
> +       list_add_tail(&dev->devlist, &tm6000_devlist);
> +       mutex_unlock(&tm6000_devlist_mutex);
> +};
> +
> +/*
> + * Extension interface
> + */
> +
> +static LIST_HEAD(tm6000_extension_devlist);
> +static DEFINE_MUTEX(tm6000_extension_devlist_lock);
> +
> +int tm6000_register_extension(struct tm6000_ops *ops)
> +{
> +       struct tm6000_core *dev = NULL;
> +
> +       mutex_lock(&tm6000_devlist_mutex);
> +       mutex_lock(&tm6000_extension_devlist_lock);
> +       list_add_tail(&ops->next, &tm6000_extension_devlist);
> +       list_for_each_entry(dev, &tm6000_devlist, devlist) {
> +               if (dev)
> +                       ops->init(dev);
> +       }
> +       printk(KERN_INFO "tm6000: Initialized (%s) extension\n", ops->name);
> +       mutex_unlock(&tm6000_extension_devlist_lock);
> +       mutex_unlock(&tm6000_devlist_mutex);
> +       return 0;
> +}
> +EXPORT_SYMBOL(tm6000_register_extension);
> +
> +void tm6000_unregister_extension(struct tm6000_ops *ops)
> +{
> +       struct tm6000_core *dev = NULL;
> +
> +       mutex_lock(&tm6000_devlist_mutex);
> +       list_for_each_entry(dev, &tm6000_devlist, devlist) {
> +               if (dev)
> +                       ops->fini(dev);
> +       }
> +
> +       mutex_lock(&tm6000_extension_devlist_lock);
> +       printk(KERN_INFO "tm6000: Remove (%s) extension\n", ops->name);
> +       list_del(&ops->next);
> +       mutex_unlock(&tm6000_extension_devlist_lock);
> +       mutex_unlock(&tm6000_devlist_mutex);
> +}
> +EXPORT_SYMBOL(tm6000_unregister_extension);
> +
> +void tm6000_init_extension(struct tm6000_core *dev)
> +{
> +       struct tm6000_ops *ops = NULL;
> +
> +       mutex_lock(&tm6000_extension_devlist_lock);
> +       if (!list_empty(&tm6000_extension_devlist)) {
> +               list_for_each_entry(ops, &tm6000_extension_devlist, next) {
> +                       if (ops->init)
> +                               ops->init(dev);
> +               }
> +       }
> +       mutex_unlock(&tm6000_extension_devlist_lock);
> +}
> +
> +void tm6000_close_extension(struct tm6000_core *dev)
> +{
> +       struct tm6000_ops *ops = NULL;
> +
> +       mutex_lock(&tm6000_extension_devlist_lock);
> +       if (!list_empty(&tm6000_extension_devlist)) {
> +               list_for_each_entry(ops, &tm6000_extension_devlist, next) {
> +                       if (ops->fini)
> +                               ops->fini(dev);
> +               }
> +       }
> +       mutex_unlock(&tm6000_extension_devlist_lock);
> +}
> diff --git a/drivers/staging/tm6000/tm6000.h b/drivers/staging/tm6000/tm6000.h
> index 6812d68..79ef72a 100644
> --- a/drivers/staging/tm6000/tm6000.h
> +++ b/drivers/staging/tm6000/tm6000.h
> @@ -168,6 +168,10 @@ struct tm6000_core {
>        struct i2c_adapter              i2c_adap;
>        struct i2c_client               i2c_client;
>
> +
> +       /* extension */
> +       struct list_head                devlist;
> +
>        /* video for linux */
>        int                             users;
>
> @@ -203,6 +207,16 @@ struct tm6000_core {
>        spinlock_t                   slock;
>  };
>
> +#define TM6000_AUDIO 0x10
> +
> +struct tm6000_ops {
> +       struct list_head        next;
> +       char                    *name;
> +       int                     id;
> +       int (*init)(struct tm6000_core *);
> +       int (*fini)(struct tm6000_core *);
> +};
> +
>  struct tm6000_fh {
>        struct tm6000_core           *dev;
>
> @@ -246,6 +260,13 @@ int tm6000_v4l2_unregister(struct tm6000_core *dev);
>  int tm6000_v4l2_exit(void);
>  void tm6000_set_fourcc_format(struct tm6000_core *dev);
>
> +void tm6000_remove_from_devlist(struct tm6000_core *dev);
> +void tm6000_add_into_devlist(struct tm6000_core *dev);
> +int tm6000_register_extension(struct tm6000_ops *ops);
> +void tm6000_unregister_extension(struct tm6000_ops *ops);
> +void tm6000_init_extension(struct tm6000_core *dev);
> +void tm6000_close_extension(struct tm6000_core *dev);
> +
>  /* In tm6000-stds.c */
>  void tm6000_get_std_res(struct tm6000_core *dev);
>  int tm6000_set_standard (struct tm6000_core *dev, v4l2_std_id *norm);
> @@ -275,7 +296,7 @@ unsigned int tm6000_v4l2_poll(struct file *file,
>  int tm6000_queue_init(struct tm6000_core *dev);
>
>  /* In tm6000-alsa.c */
> -int tm6000_audio_init(struct tm6000_core *dev, int idx);
> +/*int tm6000_audio_init(struct tm6000_core *dev, int idx);*/
>
>
>  /* Debug stuff */
> --
> 1.7.0.3
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-media" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
  
Stefan Ringel May 27, 2010, 3:27 p.m. UTC | #2
Am 27.05.2010 17:21, schrieb Bee Hock Goh:
> Stefan,
>
> Did you have a kernel opps while loading the tm6000-alsa?
>
> regards,
>  Hock.
>
>   
No, but I rewrite the  init and fini function. If that works I send it.
> On Tue, May 11, 2010 at 12:22 AM,  <stefan.ringel@arcor.de> wrote:
>   
>> From: Stefan Ringel <stefan.ringel@arcor.de>
>>
>> add extension
>> add module init over tm6000 extension
>>
>>
>> Signed-off-by: Stefan Ringel <stefan.ringel@arcor.de>
>> ---
>>  drivers/staging/tm6000/tm6000-alsa.c  |   25 +++++++++-
>>  drivers/staging/tm6000/tm6000-cards.c |    7 +++
>>  drivers/staging/tm6000/tm6000-core.c  |   92 +++++++++++++++++++++++++++++++++
>>  drivers/staging/tm6000/tm6000.h       |   23 ++++++++-
>>  4 files changed, 145 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/staging/tm6000/tm6000-alsa.c b/drivers/staging/tm6000/tm6000-alsa.c
>> index bc89f9d..ce081cd 100644
>> --- a/drivers/staging/tm6000/tm6000-alsa.c
>> +++ b/drivers/staging/tm6000/tm6000-alsa.c
>> @@ -410,5 +410,28 @@ error:
>>        snd_card_free(card);
>>        return rc;
>>  }
>> -EXPORT_SYMBOL_GPL(tm6000_audio_init);
>>
>> +static int tm6000_audio_fini(struct tm6000_core *dev)
>> +{
>> +       return 0;
>> +}
>> +
>> +struct tm6000_ops audio_ops = {
>> +       .id     = TM6000_AUDIO,
>> +       .name   = "TM6000 Audio Extension",
>> +       .init   = tm6000_audio_init,
>> +       .fini   = tm6000_audio_fini,
>> +};
>> +
>> +static int __init tm6000_alsa_register(void)
>> +{
>> +       return tm6000_register_extension(&audio_ops);
>> +}
>> +
>> +static void __exit tm6000_alsa_unregister(void)
>> +{
>> +       tm6000_unregister_extension(&audio_ops);
>> +}
>> +
>> +module_init(tm6000_alsa_register);
>> +module_exit(tm6000_alsa_unregister);
>> diff --git a/drivers/staging/tm6000/tm6000-cards.c b/drivers/staging/tm6000/tm6000-cards.c
>> index 9f6160b..33b134b 100644
>> --- a/drivers/staging/tm6000/tm6000-cards.c
>> +++ b/drivers/staging/tm6000/tm6000-cards.c
>> @@ -692,6 +692,10 @@ static int tm6000_init_dev(struct tm6000_core *dev)
>>        if (rc < 0)
>>                goto err;
>>
>> +       tm6000_add_into_devlist(dev);
>> +
>> +       tm6000_init_extension(dev);
>> +
>>        if (dev->caps.has_dvb) {
>>                dev->dvb = kzalloc(sizeof(*(dev->dvb)), GFP_KERNEL);
>>                if (!dev->dvb) {
>> @@ -931,6 +935,9 @@ static void tm6000_usb_disconnect(struct usb_interface *interface)
>>
>>        usb_put_dev(dev->udev);
>>
>> +       tm6000_remove_from_devlist(dev);
>> +       tm6000_close_extension(dev);
>> +
>>        mutex_unlock(&dev->lock);
>>        kfree(dev);
>>  }
>> diff --git a/drivers/staging/tm6000/tm6000-core.c b/drivers/staging/tm6000/tm6000-core.c
>> index bfbc53b..1259ae5 100644
>> --- a/drivers/staging/tm6000/tm6000-core.c
>> +++ b/drivers/staging/tm6000/tm6000-core.c
>> @@ -600,3 +600,95 @@ printk("Original value=%d\n",val);
>>        return val;
>>  }
>>  EXPORT_SYMBOL_GPL(tm6000_set_audio_bitrate);
>> +
>> +static LIST_HEAD(tm6000_devlist);
>> +static DEFINE_MUTEX(tm6000_devlist_mutex);
>> +
>> +/*
>> + * tm6000_realease_resource()
>> + */
>> +
>> +void tm6000_remove_from_devlist(struct tm6000_core *dev)
>> +{
>> +       mutex_lock(&tm6000_devlist_mutex);
>> +       list_del(&dev->devlist);
>> +       mutex_unlock(&tm6000_devlist_mutex);
>> +};
>> +
>> +void tm6000_add_into_devlist(struct tm6000_core *dev)
>> +{
>> +       mutex_lock(&tm6000_devlist_mutex);
>> +       list_add_tail(&dev->devlist, &tm6000_devlist);
>> +       mutex_unlock(&tm6000_devlist_mutex);
>> +};
>> +
>> +/*
>> + * Extension interface
>> + */
>> +
>> +static LIST_HEAD(tm6000_extension_devlist);
>> +static DEFINE_MUTEX(tm6000_extension_devlist_lock);
>> +
>> +int tm6000_register_extension(struct tm6000_ops *ops)
>> +{
>> +       struct tm6000_core *dev = NULL;
>> +
>> +       mutex_lock(&tm6000_devlist_mutex);
>> +       mutex_lock(&tm6000_extension_devlist_lock);
>> +       list_add_tail(&ops->next, &tm6000_extension_devlist);
>> +       list_for_each_entry(dev, &tm6000_devlist, devlist) {
>> +               if (dev)
>> +                       ops->init(dev);
>> +       }
>> +       printk(KERN_INFO "tm6000: Initialized (%s) extension\n", ops->name);
>> +       mutex_unlock(&tm6000_extension_devlist_lock);
>> +       mutex_unlock(&tm6000_devlist_mutex);
>> +       return 0;
>> +}
>> +EXPORT_SYMBOL(tm6000_register_extension);
>> +
>> +void tm6000_unregister_extension(struct tm6000_ops *ops)
>> +{
>> +       struct tm6000_core *dev = NULL;
>> +
>> +       mutex_lock(&tm6000_devlist_mutex);
>> +       list_for_each_entry(dev, &tm6000_devlist, devlist) {
>> +               if (dev)
>> +                       ops->fini(dev);
>> +       }
>> +
>> +       mutex_lock(&tm6000_extension_devlist_lock);
>> +       printk(KERN_INFO "tm6000: Remove (%s) extension\n", ops->name);
>> +       list_del(&ops->next);
>> +       mutex_unlock(&tm6000_extension_devlist_lock);
>> +       mutex_unlock(&tm6000_devlist_mutex);
>> +}
>> +EXPORT_SYMBOL(tm6000_unregister_extension);
>> +
>> +void tm6000_init_extension(struct tm6000_core *dev)
>> +{
>> +       struct tm6000_ops *ops = NULL;
>> +
>> +       mutex_lock(&tm6000_extension_devlist_lock);
>> +       if (!list_empty(&tm6000_extension_devlist)) {
>> +               list_for_each_entry(ops, &tm6000_extension_devlist, next) {
>> +                       if (ops->init)
>> +                               ops->init(dev);
>> +               }
>> +       }
>> +       mutex_unlock(&tm6000_extension_devlist_lock);
>> +}
>> +
>> +void tm6000_close_extension(struct tm6000_core *dev)
>> +{
>> +       struct tm6000_ops *ops = NULL;
>> +
>> +       mutex_lock(&tm6000_extension_devlist_lock);
>> +       if (!list_empty(&tm6000_extension_devlist)) {
>> +               list_for_each_entry(ops, &tm6000_extension_devlist, next) {
>> +                       if (ops->fini)
>> +                               ops->fini(dev);
>> +               }
>> +       }
>> +       mutex_unlock(&tm6000_extension_devlist_lock);
>> +}
>> diff --git a/drivers/staging/tm6000/tm6000.h b/drivers/staging/tm6000/tm6000.h
>> index 6812d68..79ef72a 100644
>> --- a/drivers/staging/tm6000/tm6000.h
>> +++ b/drivers/staging/tm6000/tm6000.h
>> @@ -168,6 +168,10 @@ struct tm6000_core {
>>        struct i2c_adapter              i2c_adap;
>>        struct i2c_client               i2c_client;
>>
>> +
>> +       /* extension */
>> +       struct list_head                devlist;
>> +
>>        /* video for linux */
>>        int                             users;
>>
>> @@ -203,6 +207,16 @@ struct tm6000_core {
>>        spinlock_t                   slock;
>>  };
>>
>> +#define TM6000_AUDIO 0x10
>> +
>> +struct tm6000_ops {
>> +       struct list_head        next;
>> +       char                    *name;
>> +       int                     id;
>> +       int (*init)(struct tm6000_core *);
>> +       int (*fini)(struct tm6000_core *);
>> +};
>> +
>>  struct tm6000_fh {
>>        struct tm6000_core           *dev;
>>
>> @@ -246,6 +260,13 @@ int tm6000_v4l2_unregister(struct tm6000_core *dev);
>>  int tm6000_v4l2_exit(void);
>>  void tm6000_set_fourcc_format(struct tm6000_core *dev);
>>
>> +void tm6000_remove_from_devlist(struct tm6000_core *dev);
>> +void tm6000_add_into_devlist(struct tm6000_core *dev);
>> +int tm6000_register_extension(struct tm6000_ops *ops);
>> +void tm6000_unregister_extension(struct tm6000_ops *ops);
>> +void tm6000_init_extension(struct tm6000_core *dev);
>> +void tm6000_close_extension(struct tm6000_core *dev);
>> +
>>  /* In tm6000-stds.c */
>>  void tm6000_get_std_res(struct tm6000_core *dev);
>>  int tm6000_set_standard (struct tm6000_core *dev, v4l2_std_id *norm);
>> @@ -275,7 +296,7 @@ unsigned int tm6000_v4l2_poll(struct file *file,
>>  int tm6000_queue_init(struct tm6000_core *dev);
>>
>>  /* In tm6000-alsa.c */
>> -int tm6000_audio_init(struct tm6000_core *dev, int idx);
>> +/*int tm6000_audio_init(struct tm6000_core *dev, int idx);*/
>>
>>
>>  /* Debug stuff */
>> --
>> 1.7.0.3
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-media" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>
>>
  

Patch

diff --git a/drivers/staging/tm6000/tm6000-alsa.c b/drivers/staging/tm6000/tm6000-alsa.c
index bc89f9d..ce081cd 100644
--- a/drivers/staging/tm6000/tm6000-alsa.c
+++ b/drivers/staging/tm6000/tm6000-alsa.c
@@ -410,5 +410,28 @@  error:
 	snd_card_free(card);
 	return rc;
 }
-EXPORT_SYMBOL_GPL(tm6000_audio_init);
 
+static int tm6000_audio_fini(struct tm6000_core *dev)
+{
+	return 0;
+}
+
+struct tm6000_ops audio_ops = {
+	.id	= TM6000_AUDIO,
+	.name	= "TM6000 Audio Extension",
+	.init	= tm6000_audio_init,
+	.fini	= tm6000_audio_fini,
+};
+
+static int __init tm6000_alsa_register(void)
+{
+	return tm6000_register_extension(&audio_ops);
+}
+
+static void __exit tm6000_alsa_unregister(void)
+{
+	tm6000_unregister_extension(&audio_ops);
+}
+
+module_init(tm6000_alsa_register);
+module_exit(tm6000_alsa_unregister);
diff --git a/drivers/staging/tm6000/tm6000-cards.c b/drivers/staging/tm6000/tm6000-cards.c
index 9f6160b..33b134b 100644
--- a/drivers/staging/tm6000/tm6000-cards.c
+++ b/drivers/staging/tm6000/tm6000-cards.c
@@ -692,6 +692,10 @@  static int tm6000_init_dev(struct tm6000_core *dev)
 	if (rc < 0)
 		goto err;
 
+	tm6000_add_into_devlist(dev);
+
+	tm6000_init_extension(dev);
+
 	if (dev->caps.has_dvb) {
 		dev->dvb = kzalloc(sizeof(*(dev->dvb)), GFP_KERNEL);
 		if (!dev->dvb) {
@@ -931,6 +935,9 @@  static void tm6000_usb_disconnect(struct usb_interface *interface)
 
 	usb_put_dev(dev->udev);
 
+	tm6000_remove_from_devlist(dev);
+	tm6000_close_extension(dev);
+
 	mutex_unlock(&dev->lock);
 	kfree(dev);
 }
diff --git a/drivers/staging/tm6000/tm6000-core.c b/drivers/staging/tm6000/tm6000-core.c
index bfbc53b..1259ae5 100644
--- a/drivers/staging/tm6000/tm6000-core.c
+++ b/drivers/staging/tm6000/tm6000-core.c
@@ -600,3 +600,95 @@  printk("Original value=%d\n",val);
 	return val;
 }
 EXPORT_SYMBOL_GPL(tm6000_set_audio_bitrate);
+
+static LIST_HEAD(tm6000_devlist);
+static DEFINE_MUTEX(tm6000_devlist_mutex);
+
+/*
+ * tm6000_realease_resource()
+ */
+
+void tm6000_remove_from_devlist(struct tm6000_core *dev)
+{
+	mutex_lock(&tm6000_devlist_mutex);
+	list_del(&dev->devlist);
+	mutex_unlock(&tm6000_devlist_mutex);
+};
+
+void tm6000_add_into_devlist(struct tm6000_core *dev)
+{
+	mutex_lock(&tm6000_devlist_mutex);
+	list_add_tail(&dev->devlist, &tm6000_devlist);
+	mutex_unlock(&tm6000_devlist_mutex);
+};
+
+/*
+ * Extension interface
+ */
+
+static LIST_HEAD(tm6000_extension_devlist);
+static DEFINE_MUTEX(tm6000_extension_devlist_lock);
+
+int tm6000_register_extension(struct tm6000_ops *ops)
+{
+	struct tm6000_core *dev = NULL;
+
+	mutex_lock(&tm6000_devlist_mutex);
+	mutex_lock(&tm6000_extension_devlist_lock);
+	list_add_tail(&ops->next, &tm6000_extension_devlist);
+	list_for_each_entry(dev, &tm6000_devlist, devlist) {
+		if (dev)
+			ops->init(dev);
+	}
+	printk(KERN_INFO "tm6000: Initialized (%s) extension\n", ops->name);
+	mutex_unlock(&tm6000_extension_devlist_lock);
+	mutex_unlock(&tm6000_devlist_mutex);
+	return 0;
+}
+EXPORT_SYMBOL(tm6000_register_extension);
+
+void tm6000_unregister_extension(struct tm6000_ops *ops)
+{
+	struct tm6000_core *dev = NULL;
+
+	mutex_lock(&tm6000_devlist_mutex);
+	list_for_each_entry(dev, &tm6000_devlist, devlist) {
+		if (dev)
+			ops->fini(dev);
+	}
+
+	mutex_lock(&tm6000_extension_devlist_lock);
+	printk(KERN_INFO "tm6000: Remove (%s) extension\n", ops->name);
+	list_del(&ops->next);
+	mutex_unlock(&tm6000_extension_devlist_lock);
+	mutex_unlock(&tm6000_devlist_mutex);
+}
+EXPORT_SYMBOL(tm6000_unregister_extension);
+
+void tm6000_init_extension(struct tm6000_core *dev)
+{
+	struct tm6000_ops *ops = NULL;
+
+	mutex_lock(&tm6000_extension_devlist_lock);
+	if (!list_empty(&tm6000_extension_devlist)) {
+		list_for_each_entry(ops, &tm6000_extension_devlist, next) {
+			if (ops->init)
+				ops->init(dev);
+		}
+	}
+	mutex_unlock(&tm6000_extension_devlist_lock);
+}
+
+void tm6000_close_extension(struct tm6000_core *dev)
+{
+	struct tm6000_ops *ops = NULL;
+
+	mutex_lock(&tm6000_extension_devlist_lock);
+	if (!list_empty(&tm6000_extension_devlist)) {
+		list_for_each_entry(ops, &tm6000_extension_devlist, next) {
+			if (ops->fini)
+				ops->fini(dev);
+		}
+	}
+	mutex_unlock(&tm6000_extension_devlist_lock);
+}
diff --git a/drivers/staging/tm6000/tm6000.h b/drivers/staging/tm6000/tm6000.h
index 6812d68..79ef72a 100644
--- a/drivers/staging/tm6000/tm6000.h
+++ b/drivers/staging/tm6000/tm6000.h
@@ -168,6 +168,10 @@  struct tm6000_core {
 	struct i2c_adapter		i2c_adap;
 	struct i2c_client		i2c_client;
 
+
+	/* extension */
+	struct list_head		devlist;
+
 	/* video for linux */
 	int				users;
 
@@ -203,6 +207,16 @@  struct tm6000_core {
 	spinlock_t                   slock;
 };
 
+#define TM6000_AUDIO 0x10
+
+struct tm6000_ops {
+	struct list_head	next;
+	char			*name;
+	int			id;
+	int (*init)(struct tm6000_core *);
+	int (*fini)(struct tm6000_core *);
+};
+
 struct tm6000_fh {
 	struct tm6000_core           *dev;
 
@@ -246,6 +260,13 @@  int tm6000_v4l2_unregister(struct tm6000_core *dev);
 int tm6000_v4l2_exit(void);
 void tm6000_set_fourcc_format(struct tm6000_core *dev);
 
+void tm6000_remove_from_devlist(struct tm6000_core *dev);
+void tm6000_add_into_devlist(struct tm6000_core *dev);
+int tm6000_register_extension(struct tm6000_ops *ops);
+void tm6000_unregister_extension(struct tm6000_ops *ops);
+void tm6000_init_extension(struct tm6000_core *dev);
+void tm6000_close_extension(struct tm6000_core *dev);
+
 /* In tm6000-stds.c */
 void tm6000_get_std_res(struct tm6000_core *dev);
 int tm6000_set_standard (struct tm6000_core *dev, v4l2_std_id *norm);
@@ -275,7 +296,7 @@  unsigned int tm6000_v4l2_poll(struct file *file,
 int tm6000_queue_init(struct tm6000_core *dev);
 
 /* In tm6000-alsa.c */
-int tm6000_audio_init(struct tm6000_core *dev, int idx);
+/*int tm6000_audio_init(struct tm6000_core *dev, int idx);*/
 
 
 /* Debug stuff */