diff options
Diffstat (limited to 'drivers/usb/gadget/function/uvc.h')
| -rw-r--r-- | drivers/usb/gadget/function/uvc.h | 140 |
1 files changed, 79 insertions, 61 deletions
diff --git a/drivers/usb/gadget/function/uvc.h b/drivers/usb/gadget/function/uvc.h index 11d70dead32b..9e79cbe50715 100644 --- a/drivers/usb/gadget/function/uvc.h +++ b/drivers/usb/gadget/function/uvc.h @@ -1,64 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ /* * uvc_gadget.h -- USB Video Class Gadget driver * * Copyright (C) 2009-2010 * Laurent Pinchart (laurent.pinchart@ideasonboard.com) - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. */ #ifndef _UVC_GADGET_H_ #define _UVC_GADGET_H_ -#include <linux/ioctl.h> -#include <linux/types.h> -#include <linux/usb/ch9.h> - -#define UVC_EVENT_FIRST (V4L2_EVENT_PRIVATE_START + 0) -#define UVC_EVENT_CONNECT (V4L2_EVENT_PRIVATE_START + 0) -#define UVC_EVENT_DISCONNECT (V4L2_EVENT_PRIVATE_START + 1) -#define UVC_EVENT_STREAMON (V4L2_EVENT_PRIVATE_START + 2) -#define UVC_EVENT_STREAMOFF (V4L2_EVENT_PRIVATE_START + 3) -#define UVC_EVENT_SETUP (V4L2_EVENT_PRIVATE_START + 4) -#define UVC_EVENT_DATA (V4L2_EVENT_PRIVATE_START + 5) -#define UVC_EVENT_LAST (V4L2_EVENT_PRIVATE_START + 5) - -struct uvc_request_data { - __s32 length; - __u8 data[60]; -}; +#include <linux/list.h> +#include <linux/mutex.h> +#include <linux/spinlock.h> +#include <linux/usb/composite.h> +#include <linux/videodev2.h> +#include <linux/wait.h> -struct uvc_event { - union { - enum usb_device_speed speed; - struct usb_ctrlrequest req; - struct uvc_request_data data; - }; -}; +#include <media/v4l2-device.h> +#include <media/v4l2-dev.h> +#include <media/v4l2-fh.h> -#define UVCIOC_SEND_RESPONSE _IOW('U', 1, struct uvc_request_data) +#include "uvc_queue.h" -#define UVC_INTF_CONTROL 0 -#define UVC_INTF_STREAMING 1 +struct usb_ep; +struct usb_request; +struct uvc_descriptor_header; +struct uvc_device; /* ------------------------------------------------------------------------ * Debugging, printing and logging */ -#ifdef __KERNEL__ - -#include <linux/usb.h> /* For usb_endpoint_* */ -#include <linux/usb/composite.h> -#include <linux/usb/gadget.h> -#include <linux/videodev2.h> -#include <media/v4l2-fh.h> -#include <media/v4l2-device.h> - -#include "uvc_queue.h" - #define UVC_TRACE_PROBE (1 << 0) #define UVC_TRACE_DESCR (1 << 1) #define UVC_TRACE_CONTROL (1 << 2) @@ -81,45 +53,84 @@ extern unsigned int uvc_gadget_trace_param; printk(KERN_DEBUG "uvcvideo: " msg); \ } while (0) -#define uvc_warn_once(dev, warn, msg...) \ - do { \ - if (!test_and_set_bit(warn, &dev->warnings)) \ - printk(KERN_INFO "uvcvideo: " msg); \ - } while (0) - -#define uvc_printk(level, msg...) \ - printk(level "uvcvideo: " msg) +#define uvcg_dbg(f, fmt, args...) \ + dev_dbg(&(f)->config->cdev->gadget->dev, "%s: " fmt, (f)->name, ##args) +#define uvcg_info(f, fmt, args...) \ + dev_info(&(f)->config->cdev->gadget->dev, "%s: " fmt, (f)->name, ##args) +#define uvcg_warn(f, fmt, args...) \ + dev_warn(&(f)->config->cdev->gadget->dev, "%s: " fmt, (f)->name, ##args) +#define uvcg_err(f, fmt, args...) \ + dev_err(&(f)->config->cdev->gadget->dev, "%s: " fmt, (f)->name, ##args) /* ------------------------------------------------------------------------ * Driver specific constants */ -#define UVC_NUM_REQUESTS 4 #define UVC_MAX_REQUEST_SIZE 64 #define UVC_MAX_EVENTS 4 +#define UVCG_REQUEST_HEADER_LEN 12 + +#define UVCG_REQ_MAX_INT_COUNT 16 +#define UVCG_REQ_MAX_ZERO_COUNT (2 * UVCG_REQ_MAX_INT_COUNT) + +#define UVCG_STREAMING_MIN_BUFFERS 2 + /* ------------------------------------------------------------------------ * Structures */ +struct uvc_request { + struct usb_request *req; + u8 *req_buffer; + struct uvc_video *video; + struct sg_table sgt; + u8 header[UVCG_REQUEST_HEADER_LEN]; + struct uvc_buffer *last_buf; + struct list_head list; +}; struct uvc_video { + struct uvc_device *uvc; struct usb_ep *ep; + struct work_struct pump; + struct workqueue_struct *async_wq; + + struct kthread_worker *kworker; + struct kthread_work hw_submit; + + atomic_t queued; + /* Frame parameters */ u8 bpp; u32 fcc; unsigned int width; unsigned int height; unsigned int imagesize; + unsigned int interval; struct mutex mutex; /* protects frame parameters */ + unsigned int uvc_num_requests; + + unsigned int reqs_per_frame; + /* Requests */ + bool is_enabled; /* tracks whether video stream is enabled */ unsigned int req_size; - struct usb_request *req[UVC_NUM_REQUESTS]; - __u8 *req_buffer[UVC_NUM_REQUESTS]; + struct list_head ureqs; /* all uvc_requests allocated by uvc_video */ + + /* USB requests that the video pump thread can encode into */ struct list_head req_free; + + /* + * USB requests video pump thread has already encoded into. These are + * ready to be queued to the endpoint. + */ + struct list_head req_ready; spinlock_t req_lock; + unsigned int req_int_count; + void (*encode) (struct usb_request *req, struct uvc_video *video, struct uvc_buffer *buf); @@ -143,6 +154,10 @@ struct uvc_device { enum uvc_state state; struct usb_function func; struct uvc_video video; + bool func_connected; + wait_queue_head_t func_connected_queue; + + struct uvcg_streaming_header *header; /* Descriptors */ struct { @@ -151,12 +166,14 @@ struct uvc_device { const struct uvc_descriptor_header * const *fs_streaming; const struct uvc_descriptor_header * const *hs_streaming; const struct uvc_descriptor_header * const *ss_streaming; + struct list_head *extension_units; } desc; unsigned int control_intf; - struct usb_ep *control_ep; + struct usb_ep *interrupt_ep; struct usb_request *control_req; void *control_buf; + bool enable_interrupt_ep; unsigned int streaming_intf; @@ -173,22 +190,23 @@ static inline struct uvc_device *to_uvc(struct usb_function *f) struct uvc_file_handle { struct v4l2_fh vfh; struct uvc_video *device; + bool is_uvc_app_handle; }; #define to_uvc_file_handle(handle) \ container_of(handle, struct uvc_file_handle, vfh) +static inline struct uvc_file_handle *file_to_uvc_file_handle(struct file *filp) +{ + return container_of(file_to_v4l2_fh(filp), struct uvc_file_handle, vfh); +} + /* ------------------------------------------------------------------------ * Functions */ -extern void uvc_function_setup_continue(struct uvc_device *uvc); -extern void uvc_endpoint_stream(struct uvc_device *dev); - +extern void uvc_function_setup_continue(struct uvc_device *uvc, int disable_ep); extern void uvc_function_connect(struct uvc_device *uvc); extern void uvc_function_disconnect(struct uvc_device *uvc); -#endif /* __KERNEL__ */ - #endif /* _UVC_GADGET_H_ */ - |