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

   1 /*
   2  * stk-webcam.h : Driver for Syntek 1125 USB webcam controller
   3  *
   4  * Copyright (C) 2006 Nicolas VIVIEN
   5  * Copyright 2007-2008 Jaime Velasco Juan <jsagarribay@gmail.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #ifndef STKWEBCAM_H
  19 #define STKWEBCAM_H
  20
  21 #include <linux/usb.h>
  22 #include <media/v4l2-device.h>
  23 #include <media/v4l2-ctrls.h>
  24 #include <media/v4l2-common.h>
  25
  26 #define DRIVER_VERSION          "v0.0.1"
  27 #define DRIVER_VERSION_NUM      0x000001
  28
  29 #define MAX_ISO_BUFS            3
  30 #define ISO_FRAMES_PER_DESC     16
  31 #define ISO_MAX_FRAME_SIZE      3 * 1024
  32 #define ISO_BUFFER_SIZE         (ISO_FRAMES_PER_DESC * ISO_MAX_FRAME_SIZE)
  33
  34 struct stk_iso_buf {
  35         void *data;
  36         int length;
  37         int read;
  38         struct urb *urb;
  39 };
  40
  41 /* Streaming IO buffers */
  42 struct stk_sio_buffer {
  43         struct v4l2_buffer v4lbuf;
  44         char *buffer;
  45         int mapcount;
  46         struct stk_camera *dev;
  47         struct list_head list;
  48 };
  49
  50 enum stk_mode {MODE_VGA, MODE_SXGA, MODE_CIF, MODE_QVGA, MODE_QCIF};
  51
  52 struct stk_video {
  53         enum stk_mode mode;
  54         __u32 palette;
  55         int hflip;
  56         int vflip;
  57 };
  58
  59 enum stk_status {
  60         S_PRESENT = 1,
  61         S_INITIALISED = 2,
  62         S_MEMALLOCD = 4,
  63         S_STREAMING = 8,
  64 };
  65 #define is_present(dev)         ((dev)->status & S_PRESENT)
  66 #define is_initialised(dev)     ((dev)->status & S_INITIALISED)
  67 #define is_streaming(dev)       ((dev)->status & S_STREAMING)
  68 #define is_memallocd(dev)       ((dev)->status & S_MEMALLOCD)
  69 #define set_present(dev)        ((dev)->status = S_PRESENT)
  70 #define unset_present(dev)      ((dev)->status &= \
  71                                         ~(S_PRESENT|S_INITIALISED|S_STREAMING))
  72 #define set_initialised(dev)    ((dev)->status |= S_INITIALISED)
  73 #define unset_initialised(dev)  ((dev)->status &= ~S_INITIALISED)
  74 #define set_memallocd(dev)      ((dev)->status |= S_MEMALLOCD)
  75 #define unset_memallocd(dev)    ((dev)->status &= ~S_MEMALLOCD)
  76 #define set_streaming(dev)      ((dev)->status |= S_STREAMING)
  77 #define unset_streaming(dev)    ((dev)->status &= ~S_STREAMING)
  78
  79 struct regval {
  80         unsigned reg;
  81         unsigned val;
  82 };
  83
  84 struct stk_camera {
  85         struct v4l2_device v4l2_dev;
  86         struct v4l2_ctrl_handler hdl;
  87         struct video_device vdev;
  88         struct usb_device *udev;
  89         struct usb_interface *interface;
  90         int webcam_model;
  91         struct file *owner;
  92         struct mutex lock;
  93         int first_init;
  94
  95         u8 isoc_ep;
  96
  97         /* Not sure if this is right */
  98         atomic_t urbs_used;
  99
 100         struct stk_video vsettings;
 101
 102         enum stk_status status;
 103
 104         spinlock_t spinlock;
 105         wait_queue_head_t wait_frame;
 106
 107         struct stk_iso_buf *isobufs;
 108
 109         int frame_size;
 110         /* Streaming buffers */
 111         int reading;
 112         unsigned int n_sbufs;
 113         struct stk_sio_buffer *sio_bufs;
 114         struct list_head sio_avail;
 115         struct list_head sio_full;
 116         unsigned sequence;
 117 };
 118
 119 #define vdev_to_camera(d) container_of(d, struct stk_camera, vdev)
 120
 121 int stk_camera_write_reg(struct stk_camera *, u16, u8);
 122 int stk_camera_read_reg(struct stk_camera *, u16, u8 *);
 123
 124 int stk_sensor_init(struct stk_camera *);
 125 int stk_sensor_configure(struct stk_camera *);
 126 int stk_sensor_sleep(struct stk_camera *dev);
 127 int stk_sensor_wakeup(struct stk_camera *dev);
 128 int stk_sensor_set_brightness(struct stk_camera *dev, int br);
 129
 130 #endif