191 lines
4.6 KiB
C
191 lines
4.6 KiB
C
// 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 (laurent.pinchart@ideasonboard.com)
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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/ioctl.h>
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#include <linux/types.h>
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#include <linux/usb/ch9.h>
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#define UVC_EVENT_FIRST (V4L2_EVENT_PRIVATE_START + 0)
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#define UVC_EVENT_CONNECT (V4L2_EVENT_PRIVATE_START + 0)
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#define UVC_EVENT_DISCONNECT (V4L2_EVENT_PRIVATE_START + 1)
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#define UVC_EVENT_STREAMON (V4L2_EVENT_PRIVATE_START + 2)
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#define UVC_EVENT_STREAMOFF (V4L2_EVENT_PRIVATE_START + 3)
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#define UVC_EVENT_SETUP (V4L2_EVENT_PRIVATE_START + 4)
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#define UVC_EVENT_DATA (V4L2_EVENT_PRIVATE_START + 5)
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#define UVC_EVENT_LAST (V4L2_EVENT_PRIVATE_START + 5)
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struct uvc_request_data {
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__s32 length;
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__u8 data[60];
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};
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struct uvc_event {
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union {
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enum usb_device_speed speed;
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struct usb_ctrlrequest req;
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struct uvc_request_data data;
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};
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};
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#define UVCIOC_SEND_RESPONSE _IOW('U', 1, struct uvc_request_data)
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#define UVC_INTF_CONTROL 0
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#define UVC_INTF_STREAMING 1
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/* ------------------------------------------------------------------------
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* Debugging, printing and logging
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*/
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#ifdef __KERNEL__
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#include <linux/usb.h> /* For usb_endpoint_* */
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#include <linux/usb/composite.h>
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#include <linux/usb/gadget.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-fh.h>
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#include <media/v4l2-device.h>
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#include "uvc_queue.h"
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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 uvc_warn_once(dev, warn, msg...) \
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do { \
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if (!test_and_set_bit(warn, &dev->warnings)) \
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printk(KERN_INFO "uvcvideo: " msg); \
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} while (0)
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#define uvc_printk(level, msg...) \
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printk(level "uvcvideo: " msg)
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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 usb_ep *ep;
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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 /* __KERNEL__ */
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#endif /* _UVC_GADGET_H_ */
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