git.oblomov.eu Git - linux-2.6/blob - drivers/usb/media/zc0301.h

   1 /***************************************************************************
   2  * V4L2 driver for ZC0301 Image Processor and Control Chip                 *
   3  *                                                                         *
   4  * Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it>       *
   5  *                                                                         *
   6  * This program is free software; you can redistribute it and/or modify    *
   7  * it under the terms of the GNU General Public License as published by    *
   8  * the Free Software Foundation; either version 2 of the License, or       *
   9  * (at your option) any later version.                                     *
  10  *                                                                         *
  11  * This program is distributed in the hope that it will be useful,         *
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of          *
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           *
  14  * GNU General Public License for more details.                            *
  15  *                                                                         *
  16  * You should have received a copy of the GNU General Public License       *
  17  * along with this program; if not, write to the Free Software             *
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.               *
  19  ***************************************************************************/
  20
  21 #ifndef _ZC0301_H_
  22 #define _ZC0301_H_
  23
  24 #include <linux/version.h>
  25 #include <linux/usb.h>
  26 #include <linux/videodev2.h>
  27 #include <media/v4l2-common.h>
  28 #include <linux/device.h>
  29 #include <linux/list.h>
  30 #include <linux/spinlock.h>
  31 #include <linux/time.h>
  32 #include <linux/wait.h>
  33 #include <linux/types.h>
  34 #include <linux/param.h>
  35 #include <linux/mutex.h>
  36 #include <linux/rwsem.h>
  37 #include <asm/semaphore.h>
  38
  39 #include "zc0301_sensor.h"
  40
  41 /*****************************************************************************/
  42
  43 #define ZC0301_DEBUG
  44 #define ZC0301_DEBUG_LEVEL         2
  45 #define ZC0301_MAX_DEVICES         64
  46 #define ZC0301_FORCE_MUNMAP        0
  47 #define ZC0301_MAX_FRAMES          32
  48 #define ZC0301_COMPRESSION_QUALITY 2
  49 #define ZC0301_URBS                2
  50 #define ZC0301_ISO_PACKETS         7
  51 #define ZC0301_ALTERNATE_SETTING   7
  52 #define ZC0301_URB_TIMEOUT         msecs_to_jiffies(2 * ZC0301_ISO_PACKETS)
  53 #define ZC0301_CTRL_TIMEOUT        100
  54 #define ZC0301_FRAME_TIMEOUT       2 * 1000 * msecs_to_jiffies(1)
  55
  56 /*****************************************************************************/
  57
  58 ZC0301_ID_TABLE
  59 ZC0301_SENSOR_TABLE
  60
  61 enum zc0301_frame_state {
  62         F_UNUSED,
  63         F_QUEUED,
  64         F_GRABBING,
  65         F_DONE,
  66         F_ERROR,
  67 };
  68
  69 struct zc0301_frame_t {
  70         void* bufmem;
  71         struct v4l2_buffer buf;
  72         enum zc0301_frame_state state;
  73         struct list_head frame;
  74         unsigned long vma_use_count;
  75 };
  76
  77 enum zc0301_dev_state {
  78         DEV_INITIALIZED = 0x01,
  79         DEV_DISCONNECTED = 0x02,
  80         DEV_MISCONFIGURED = 0x04,
  81 };
  82
  83 enum zc0301_io_method {
  84         IO_NONE,
  85         IO_READ,
  86         IO_MMAP,
  87 };
  88
  89 enum zc0301_stream_state {
  90         STREAM_OFF,
  91         STREAM_INTERRUPT,
  92         STREAM_ON,
  93 };
  94
  95 struct zc0301_module_param {
  96         u8 force_munmap;
  97 };
  98
  99 static DECLARE_RWSEM(zc0301_disconnect);
 100
 101 struct zc0301_device {
 102         struct video_device* v4ldev;
 103
 104         struct zc0301_sensor* sensor;
 105
 106         struct usb_device* usbdev;
 107         struct urb* urb[ZC0301_URBS];
 108         void* transfer_buffer[ZC0301_URBS];
 109         u8* control_buffer;
 110
 111         struct zc0301_frame_t *frame_current, frame[ZC0301_MAX_FRAMES];
 112         struct list_head inqueue, outqueue;
 113         u32 frame_count, nbuffers, nreadbuffers;
 114
 115         enum zc0301_io_method io;
 116         enum zc0301_stream_state stream;
 117
 118         struct v4l2_jpegcompression compression;
 119
 120         struct zc0301_module_param module_param;
 121
 122         enum zc0301_dev_state state;
 123         u8 users;
 124
 125         struct mutex dev_mutex, fileop_mutex;
 126         spinlock_t queue_lock;
 127         wait_queue_head_t open, wait_frame, wait_stream;
 128 };
 129
 130 /*****************************************************************************/
 131
 132 void
 133 zc0301_attach_sensor(struct zc0301_device* cam, struct zc0301_sensor* sensor)
 134 {
 135         cam->sensor = sensor;
 136         cam->sensor->usbdev = cam->usbdev;
 137 }
 138
 139 /*****************************************************************************/
 140
 141 #undef DBG
 142 #undef KDBG
 143 #ifdef ZC0301_DEBUG
 144 #       define DBG(level, fmt, args...)                                       \
 145 do {                                                                          \
 146         if (debug >= (level)) {                                               \
 147                 if ((level) == 1)                                             \
 148                         dev_err(&cam->usbdev->dev, fmt "\n", ## args);        \
 149                 else if ((level) == 2)                                        \
 150                         dev_info(&cam->usbdev->dev, fmt "\n", ## args);       \
 151                 else if ((level) >= 3)                                        \
 152                         dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n",      \
 153                                  __FUNCTION__, __LINE__ , ## args);           \
 154         }                                                                     \
 155 } while (0)
 156 #       define KDBG(level, fmt, args...)                                      \
 157 do {                                                                          \
 158         if (debug >= (level)) {                                               \
 159                 if ((level) == 1 || (level) == 2)                             \
 160                         pr_info("zc0301: " fmt "\n", ## args);                \
 161                 else if ((level) == 3)                                        \
 162                         pr_debug("zc0301: [%s:%d] " fmt "\n", __FUNCTION__,   \
 163                                  __LINE__ , ## args);                         \
 164         }                                                                     \
 165 } while (0)
 166 #       define V4LDBG(level, name, cmd)                                       \
 167 do {                                                                          \
 168         if (debug >= (level))                                                 \
 169                 v4l_print_ioctl(name, cmd);                                   \
 170 } while (0)
 171 #else
 172 #       define DBG(level, fmt, args...) do {;} while(0)
 173 #       define KDBG(level, fmt, args...) do {;} while(0)
 174 #       define V4LDBG(level, name, cmd) do {;} while(0)
 175 #endif
 176
 177 #undef PDBG
 178 #define PDBG(fmt, args...)                                                    \
 179 dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n",                              \
 180          __FUNCTION__, __LINE__ , ## args)
 181
 182 #undef PDBGG
 183 #define PDBGG(fmt, args...) do {;} while(0) /* placeholder */
 184
 185 #endif /* _ZC0301_H_ */