Allow for different vendors to be notified on USB SND connect/disconnect seqeunces. This allows for vendor USB SND modules to properly initialize and populate internal structures with references to the USB SND chip device.
Signed-off-by: Wesley Cheng quic_wcheng@quicinc.com --- sound/usb/card.c | 22 ++++++++++++++++++++++ sound/usb/card.h | 7 +++++++ 2 files changed, 29 insertions(+)
diff --git a/sound/usb/card.c b/sound/usb/card.c index 26268ffb8274..212f55a7683c 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -117,6 +117,21 @@ MODULE_PARM_DESC(skip_validation, "Skip unit descriptor validation (default: no) static DEFINE_MUTEX(register_mutex); static struct snd_usb_audio *usb_chip[SNDRV_CARDS]; static struct usb_driver usb_audio_driver; +static struct snd_usb_vendor_ops *vendor_ops; + +int snd_usb_register_vendor_ops(struct snd_usb_vendor_ops *ops) +{ + vendor_ops = ops; + return 0; +} +EXPORT_SYMBOL_GPL(snd_usb_register_vendor_ops); + +int snd_usb_unregister_vendor_ops(void) +{ + vendor_ops = NULL; + return 0; +} +EXPORT_SYMBOL_GPL(snd_usb_unregister_vendor_ops);
/* * disconnect streams @@ -910,6 +925,10 @@ static int usb_audio_probe(struct usb_interface *intf, usb_set_intfdata(intf, chip); atomic_dec(&chip->active); mutex_unlock(®ister_mutex); + + if (vendor_ops->connect_cb) + vendor_ops->connect_cb(intf, chip); + return 0;
__error: @@ -943,6 +962,9 @@ static void usb_audio_disconnect(struct usb_interface *intf) if (chip == USB_AUDIO_IFACE_UNUSED) return;
+ if (vendor_ops->disconnect_cb) + vendor_ops->disconnect_cb(intf); + card = chip->card;
mutex_lock(®ister_mutex); diff --git a/sound/usb/card.h b/sound/usb/card.h index 40061550105a..a785bb256b0d 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -206,4 +206,11 @@ struct snd_usb_stream { struct list_head list; };
+struct snd_usb_vendor_ops { + void (*connect_cb)(struct usb_interface *intf, struct snd_usb_audio *chip); + void (*disconnect_cb)(struct usb_interface *intf); +}; + +int snd_usb_register_vendor_ops(struct snd_usb_vendor_ops *ops); +int snd_usb_unregister_vendor_ops(void); #endif /* __USBAUDIO_CARD_H */