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165 lines
4.1 KiB
165 lines
4.1 KiB
/* SPDX-License-Identifier: GPL-2.0+ */ |
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/* |
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* uvc_gadget.h -- USB Video Class Gadget driver |
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* |
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* Copyright (C) 2009-2010 |
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* Laurent Pinchart ([email protected]) |
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*/ |
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#ifndef _UVC_GADGET_H_ |
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#define _UVC_GADGET_H_ |
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#include <linux/list.h> |
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#include <linux/mutex.h> |
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#include <linux/spinlock.h> |
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#include <linux/usb/composite.h> |
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#include <linux/videodev2.h> |
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#include <media/v4l2-device.h> |
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#include <media/v4l2-dev.h> |
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#include <media/v4l2-fh.h> |
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#include "uvc_queue.h" |
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struct usb_ep; |
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struct usb_request; |
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struct uvc_descriptor_header; |
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struct uvc_device; |
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/* ------------------------------------------------------------------------ |
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* Debugging, printing and logging |
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*/ |
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#define UVC_TRACE_PROBE (1 << 0) |
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#define UVC_TRACE_DESCR (1 << 1) |
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#define UVC_TRACE_CONTROL (1 << 2) |
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#define UVC_TRACE_FORMAT (1 << 3) |
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#define UVC_TRACE_CAPTURE (1 << 4) |
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#define UVC_TRACE_CALLS (1 << 5) |
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#define UVC_TRACE_IOCTL (1 << 6) |
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#define UVC_TRACE_FRAME (1 << 7) |
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#define UVC_TRACE_SUSPEND (1 << 8) |
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#define UVC_TRACE_STATUS (1 << 9) |
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#define UVC_WARN_MINMAX 0 |
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#define UVC_WARN_PROBE_DEF 1 |
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extern unsigned int uvc_gadget_trace_param; |
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#define uvc_trace(flag, msg...) \ |
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do { \ |
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if (uvc_gadget_trace_param & flag) \ |
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printk(KERN_DEBUG "uvcvideo: " msg); \ |
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} while (0) |
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#define uvcg_dbg(f, fmt, args...) \ |
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dev_dbg(&(f)->config->cdev->gadget->dev, "%s: " fmt, (f)->name, ##args) |
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#define uvcg_info(f, fmt, args...) \ |
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dev_info(&(f)->config->cdev->gadget->dev, "%s: " fmt, (f)->name, ##args) |
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#define uvcg_warn(f, fmt, args...) \ |
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dev_warn(&(f)->config->cdev->gadget->dev, "%s: " fmt, (f)->name, ##args) |
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#define uvcg_err(f, fmt, args...) \ |
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dev_err(&(f)->config->cdev->gadget->dev, "%s: " fmt, (f)->name, ##args) |
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/* ------------------------------------------------------------------------ |
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* Driver specific constants |
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*/ |
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#define UVC_NUM_REQUESTS 4 |
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#define UVC_MAX_REQUEST_SIZE 64 |
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#define UVC_MAX_EVENTS 4 |
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/* ------------------------------------------------------------------------ |
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* Structures |
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*/ |
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struct uvc_video { |
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struct uvc_device *uvc; |
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struct usb_ep *ep; |
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struct work_struct pump; |
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/* Frame parameters */ |
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u8 bpp; |
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u32 fcc; |
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unsigned int width; |
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unsigned int height; |
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unsigned int imagesize; |
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struct mutex mutex; /* protects frame parameters */ |
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/* Requests */ |
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unsigned int req_size; |
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struct usb_request *req[UVC_NUM_REQUESTS]; |
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__u8 *req_buffer[UVC_NUM_REQUESTS]; |
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struct list_head req_free; |
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spinlock_t req_lock; |
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void (*encode) (struct usb_request *req, struct uvc_video *video, |
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struct uvc_buffer *buf); |
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/* Context data used by the completion handler */ |
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__u32 payload_size; |
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__u32 max_payload_size; |
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struct uvc_video_queue queue; |
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unsigned int fid; |
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}; |
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enum uvc_state { |
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UVC_STATE_DISCONNECTED, |
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UVC_STATE_CONNECTED, |
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UVC_STATE_STREAMING, |
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}; |
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struct uvc_device { |
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struct video_device vdev; |
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struct v4l2_device v4l2_dev; |
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enum uvc_state state; |
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struct usb_function func; |
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struct uvc_video video; |
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/* Descriptors */ |
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struct { |
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const struct uvc_descriptor_header * const *fs_control; |
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const struct uvc_descriptor_header * const *ss_control; |
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const struct uvc_descriptor_header * const *fs_streaming; |
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const struct uvc_descriptor_header * const *hs_streaming; |
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const struct uvc_descriptor_header * const *ss_streaming; |
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} desc; |
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unsigned int control_intf; |
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struct usb_ep *control_ep; |
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struct usb_request *control_req; |
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void *control_buf; |
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unsigned int streaming_intf; |
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/* Events */ |
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unsigned int event_length; |
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unsigned int event_setup_out : 1; |
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}; |
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static inline struct uvc_device *to_uvc(struct usb_function *f) |
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{ |
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return container_of(f, struct uvc_device, func); |
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} |
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struct uvc_file_handle { |
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struct v4l2_fh vfh; |
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struct uvc_video *device; |
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}; |
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#define to_uvc_file_handle(handle) \ |
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container_of(handle, struct uvc_file_handle, vfh) |
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/* ------------------------------------------------------------------------ |
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* Functions |
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*/ |
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extern void uvc_function_setup_continue(struct uvc_device *uvc); |
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extern void uvc_endpoint_stream(struct uvc_device *dev); |
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extern void uvc_function_connect(struct uvc_device *uvc); |
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extern void uvc_function_disconnect(struct uvc_device *uvc); |
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#endif /* _UVC_GADGET_H_ */
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