drivers/media/usb/stkwebcam/stk-webcam.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * stk-webcam.h : Driver for Syntek 1125 USB webcam controller
   4  *
   5  * Copyright (C) 2006 Nicolas VIVIEN
   6  * Copyright 2007-2008 Jaime Velasco Juan <jsagarribay@gmail.com>
   7  */
   8
   9 #ifndef STKWEBCAM_H
  10 #define STKWEBCAM_H
  11
  12 #include <linux/usb.h>
  13 #include <media/v4l2-device.h>
  14 #include <media/v4l2-ctrls.h>
  15 #include <media/v4l2-common.h>
  16
  17 #define DRIVER_VERSION          "v0.0.1"
  18 #define DRIVER_VERSION_NUM      0x000001
  19
  20 #define MAX_ISO_BUFS            3
  21 #define ISO_FRAMES_PER_DESC     16
  22 #define ISO_MAX_FRAME_SIZE      3 * 1024
  23 #define ISO_BUFFER_SIZE         (ISO_FRAMES_PER_DESC * ISO_MAX_FRAME_SIZE)
  24
  25 struct stk_iso_buf {
  26         void *data;
  27         int length;
  28         int read;
  29         struct urb *urb;
  30 };
  31
  32 /* Streaming IO buffers */
  33 struct stk_sio_buffer {
  34         struct v4l2_buffer v4lbuf;
  35         char *buffer;
  36         int mapcount;
  37         struct stk_camera *dev;
  38         struct list_head list;
  39 };
  40
  41 enum stk_mode {MODE_VGA, MODE_SXGA, MODE_CIF, MODE_QVGA, MODE_QCIF};
  42
  43 struct stk_video {
  44         enum stk_mode mode;
  45         __u32 palette;
  46         int hflip;
  47         int vflip;
  48 };
  49
  50 enum stk_status {
  51         S_PRESENT = 1,
  52         S_INITIALISED = 2,
  53         S_MEMALLOCD = 4,
  54         S_STREAMING = 8,
  55 };
  56 #define is_present(dev)         ((dev)->status & S_PRESENT)
  57 #define is_initialised(dev)     ((dev)->status & S_INITIALISED)
  58 #define is_streaming(dev)       ((dev)->status & S_STREAMING)
  59 #define is_memallocd(dev)       ((dev)->status & S_MEMALLOCD)
  60 #define set_present(dev)        ((dev)->status = S_PRESENT)
  61 #define unset_present(dev)      ((dev)->status &= \
  62                                         ~(S_PRESENT|S_INITIALISED|S_STREAMING))
  63 #define set_initialised(dev)    ((dev)->status |= S_INITIALISED)
  64 #define unset_initialised(dev)  ((dev)->status &= ~S_INITIALISED)
  65 #define set_memallocd(dev)      ((dev)->status |= S_MEMALLOCD)
  66 #define unset_memallocd(dev)    ((dev)->status &= ~S_MEMALLOCD)
  67 #define set_streaming(dev)      ((dev)->status |= S_STREAMING)
  68 #define unset_streaming(dev)    ((dev)->status &= ~S_STREAMING)
  69
  70 struct regval {
  71         unsigned reg;
  72         unsigned val;
  73 };
  74
  75 struct stk_camera {
  76         struct v4l2_device v4l2_dev;
  77         struct v4l2_ctrl_handler hdl;
  78         struct video_device vdev;
  79         struct usb_device *udev;
  80         struct usb_interface *interface;
  81         int webcam_model;
  82         struct file *owner;
  83         struct mutex lock;
  84         int first_init;
  85
  86         u8 isoc_ep;
  87
  88         /* Not sure if this is right */
  89         atomic_t urbs_used;
  90
  91         struct stk_video vsettings;
  92
  93         enum stk_status status;
  94
  95         spinlock_t spinlock;
  96         wait_queue_head_t wait_frame;
  97
  98         struct stk_iso_buf *isobufs;
  99
 100         int frame_size;
 101         /* Streaming buffers */
 102         int reading;
 103         unsigned int n_sbufs;
 104         struct stk_sio_buffer *sio_bufs;
 105         struct list_head sio_avail;
 106         struct list_head sio_full;
 107         unsigned sequence;
 108 };
 109
 110 #define vdev_to_camera(d) container_of(d, struct stk_camera, vdev)
 111
 112 int stk_camera_write_reg(struct stk_camera *, u16, u8);
 113 int stk_camera_read_reg(struct stk_camera *, u16, u8 *);
 114
 115 int stk_sensor_init(struct stk_camera *);
 116 int stk_sensor_configure(struct stk_camera *);
 117 int stk_sensor_sleep(struct stk_camera *dev);
 118 int stk_sensor_wakeup(struct stk_camera *dev);
 119 int stk_sensor_set_brightness(struct stk_camera *dev, int br);
 120
 121 #endif