diff options
Diffstat (limited to 'drivers/usb/gadget/function/f_uvc.c')
| -rw-r--r-- | drivers/usb/gadget/function/f_uvc.c | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c index 439eba660e95..d8ce7868fe22 100644 --- a/drivers/usb/gadget/function/f_uvc.c +++ b/drivers/usb/gadget/function/f_uvc.c @@ -6,16 +6,17 @@ * Laurent Pinchart ([email protected]) */ -#include <linux/kernel.h> -#include <linux/module.h> #include <linux/device.h> #include <linux/errno.h> #include <linux/fs.h> +#include <linux/kernel.h> #include <linux/list.h> +#include <linux/module.h> #include <linux/mutex.h> #include <linux/string.h> #include <linux/usb/ch9.h> #include <linux/usb/gadget.h> +#include <linux/usb/g_uvc.h> #include <linux/usb/video.h> #include <linux/vmalloc.h> #include <linux/wait.h> @@ -30,6 +31,8 @@ #include "uvc_video.h" unsigned int uvc_gadget_trace_param; +module_param_named(trace, uvc_gadget_trace_param, uint, 0644); +MODULE_PARM_DESC(trace, "Trace level bitmask"); /* -------------------------------------------------------------------------- * Function descriptors @@ -410,10 +413,21 @@ uvc_function_disconnect(struct uvc_device *uvc) * USB probe and disconnect */ +static ssize_t function_name_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct uvc_device *uvc = dev_get_drvdata(dev); + + return sprintf(buf, "%s\n", uvc->func.fi->group.cg_item.ci_name); +} + +static DEVICE_ATTR_RO(function_name); + static int uvc_register_video(struct uvc_device *uvc) { struct usb_composite_dev *cdev = uvc->func.config->cdev; + int ret; /* TODO reference counting. */ uvc->vdev.v4l2_dev = &uvc->v4l2_dev; @@ -426,7 +440,17 @@ uvc_register_video(struct uvc_device *uvc) video_set_drvdata(&uvc->vdev, uvc); - return video_register_device(&uvc->vdev, VFL_TYPE_GRABBER, -1); + ret = video_register_device(&uvc->vdev, VFL_TYPE_GRABBER, -1); + if (ret < 0) + return ret; + + ret = device_create_file(&uvc->vdev.dev, &dev_attr_function_name); + if (ret < 0) { + video_unregister_device(&uvc->vdev); + return ret; + } + + return 0; } #define UVC_COPY_DESCRIPTOR(mem, dst, desc) \ @@ -864,6 +888,7 @@ static void uvc_unbind(struct usb_configuration *c, struct usb_function *f) INFO(cdev, "%s\n", __func__); + device_remove_file(&uvc->vdev.dev, &dev_attr_function_name); video_unregister_device(&uvc->vdev); v4l2_device_unregister(&uvc->v4l2_dev); |