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  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21
  22 #ifndef STKWEBCAM_H
  23 #define STKWEBCAM_H
  24
  25 #include <linux/usb.h>
  26 #include <media/v4l2-device.h>
  27 #include <media/v4l2-ctrls.h>
  28 #include <media/v4l2-common.h>
  29
  30 #define DRIVER_VERSION          "v0.0.1"
  31 #define DRIVER_VERSION_NUM      0x000001
  32
  33 #define MAX_ISO_BUFS            3
  34 #define ISO_FRAMES_PER_DESC     16
  35 #define ISO_MAX_FRAME_SIZE      3 * 1024
  36 #define ISO_BUFFER_SIZE         (ISO_FRAMES_PER_DESC * ISO_MAX_FRAME_SIZE)
  37
  38
  39 #define PREFIX                          "stkwebcam: "
  40 #define STK_INFO(str, args...)          printk(KERN_INFO PREFIX str, ##args)
  41 #define STK_ERROR(str, args...)         printk(KERN_ERR PREFIX str, ##args)
  42 #define STK_WARNING(str, args...)       printk(KERN_WARNING PREFIX str, ##args)
  43
  44 struct stk_iso_buf {
  45         void *data;
  46         int length;
  47         int read;
  48         struct urb *urb;
  49 };
  50
  51 /* Streaming IO buffers */
  52 struct stk_sio_buffer {
  53         struct v4l2_buffer v4lbuf;
  54         char *buffer;
  55         int mapcount;
  56         struct stk_camera *dev;
  57         struct list_head list;
  58 };
  59
  60 enum stk_mode {MODE_VGA, MODE_SXGA, MODE_CIF, MODE_QVGA, MODE_QCIF};
  61
  62 struct stk_video {
  63         enum stk_mode mode;
  64         __u32 palette;
  65         int hflip;
  66         int vflip;
  67 };
  68
  69 enum stk_status {
  70         S_PRESENT = 1,
  71         S_INITIALISED = 2,
  72         S_MEMALLOCD = 4,
  73         S_STREAMING = 8,
  74 };
  75 #define is_present(dev)         ((dev)->status & S_PRESENT)
  76 #define is_initialised(dev)     ((dev)->status & S_INITIALISED)
  77 #define is_streaming(dev)       ((dev)->status & S_STREAMING)
  78 #define is_memallocd(dev)       ((dev)->status & S_MEMALLOCD)
  79 #define set_present(dev)        ((dev)->status = S_PRESENT)
  80 #define unset_present(dev)      ((dev)->status &= \
  81                                         ~(S_PRESENT|S_INITIALISED|S_STREAMING))
  82 #define set_initialised(dev)    ((dev)->status |= S_INITIALISED)
  83 #define unset_initialised(dev)  ((dev)->status &= ~S_INITIALISED)
  84 #define set_memallocd(dev)      ((dev)->status |= S_MEMALLOCD)
  85 #define unset_memallocd(dev)    ((dev)->status &= ~S_MEMALLOCD)
  86 #define set_streaming(dev)      ((dev)->status |= S_STREAMING)
  87 #define unset_streaming(dev)    ((dev)->status &= ~S_STREAMING)
  88
  89 struct regval {
  90         unsigned reg;
  91         unsigned val;
  92 };
  93
  94 struct stk_camera {
  95         struct v4l2_device v4l2_dev;
  96         struct v4l2_ctrl_handler hdl;
  97         struct video_device vdev;
  98         struct usb_device *udev;
  99         struct usb_interface *interface;
 100         int webcam_model;
 101         struct file *owner;
 102         struct mutex lock;
 103         int first_init;
 104
 105         u8 isoc_ep;
 106
 107         /* Not sure if this is right */
 108         atomic_t urbs_used;
 109
 110         struct stk_video vsettings;
 111
 112         enum stk_status status;
 113
 114         spinlock_t spinlock;
 115         wait_queue_head_t wait_frame;
 116
 117         struct stk_iso_buf *isobufs;
 118
 119         int frame_size;
 120         /* Streaming buffers */
 121         int reading;
 122         unsigned int n_sbufs;
 123         struct stk_sio_buffer *sio_bufs;
 124         struct list_head sio_avail;
 125         struct list_head sio_full;
 126         unsigned sequence;
 127 };
 128
 129 #define vdev_to_camera(d) container_of(d, struct stk_camera, vdev)
 130
 131 int stk_camera_write_reg(struct stk_camera *, u16, u8);
 132 int stk_camera_read_reg(struct stk_camera *, u16, int *);
 133
 134 int stk_sensor_init(struct stk_camera *);
 135 int stk_sensor_configure(struct stk_camera *);
 136 int stk_sensor_sleep(struct stk_camera *dev);
 137 int stk_sensor_wakeup(struct stk_camera *dev);
 138 int stk_sensor_set_brightness(struct stk_camera *dev, int br);
 139
 140 #endif