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 <linux/stddef.h>
  38 #include <linux/string.h>
  39
  40 #include "zc0301_sensor.h"
  41
  42 /*****************************************************************************/
  43
  44 #define ZC0301_DEBUG
  45 #define ZC0301_DEBUG_LEVEL         2
  46 #define ZC0301_MAX_DEVICES         64
  47 #define ZC0301_FORCE_MUNMAP        0
  48 #define ZC0301_MAX_FRAMES          32
  49 #define ZC0301_COMPRESSION_QUALITY 0
  50 #define ZC0301_URBS                2
  51 #define ZC0301_ISO_PACKETS         7
  52 #define ZC0301_ALTERNATE_SETTING   7
  53 #define ZC0301_URB_TIMEOUT         msecs_to_jiffies(2 * ZC0301_ISO_PACKETS)
  54 #define ZC0301_CTRL_TIMEOUT        100
  55 #define ZC0301_FRAME_TIMEOUT       2
  56
  57 /*****************************************************************************/
  58
  59 ZC0301_ID_TABLE
  60 ZC0301_SENSOR_TABLE
  61
  62 enum zc0301_frame_state {
  63         F_UNUSED,
  64         F_QUEUED,
  65         F_GRABBING,
  66         F_DONE,
  67         F_ERROR,
  68 };
  69
  70 struct zc0301_frame_t {
  71         void* bufmem;
  72         struct v4l2_buffer buf;
  73         enum zc0301_frame_state state;
  74         struct list_head frame;
  75         unsigned long vma_use_count;
  76 };
  77
  78 enum zc0301_dev_state {
  79         DEV_INITIALIZED = 0x01,
  80         DEV_DISCONNECTED = 0x02,
  81         DEV_MISCONFIGURED = 0x04,
  82 };
  83
  84 enum zc0301_io_method {
  85         IO_NONE,
  86         IO_READ,
  87         IO_MMAP,
  88 };
  89
  90 enum zc0301_stream_state {
  91         STREAM_OFF,
  92         STREAM_INTERRUPT,
  93         STREAM_ON,
  94 };
  95
  96 struct zc0301_module_param {
  97         u8 force_munmap;
  98         u16 frame_timeout;
  99 };
 100
 101 static DECLARE_RWSEM(zc0301_disconnect);
 102
 103 struct zc0301_device {
 104         struct video_device* v4ldev;
 105
 106         struct zc0301_sensor sensor;
 107
 108         struct usb_device* usbdev;
 109         struct urb* urb[ZC0301_URBS];
 110         void* transfer_buffer[ZC0301_URBS];
 111         u8* control_buffer;
 112
 113         struct zc0301_frame_t *frame_current, frame[ZC0301_MAX_FRAMES];
 114         struct list_head inqueue, outqueue;
 115         u32 frame_count, nbuffers, nreadbuffers;
 116
 117         enum zc0301_io_method io;
 118         enum zc0301_stream_state stream;
 119
 120         struct v4l2_jpegcompression compression;
 121
 122         struct zc0301_module_param module_param;
 123
 124         enum zc0301_dev_state state;
 125         u8 users;
 126
 127         struct mutex dev_mutex, fileop_mutex;
 128         spinlock_t queue_lock;
 129         wait_queue_head_t open, wait_frame, wait_stream;
 130 };
 131
 132 /*****************************************************************************/
 133
 134 struct zc0301_device*
 135 zc0301_match_id(struct zc0301_device* cam, const struct usb_device_id *id)
 136 {
 137         if (usb_match_id(usb_ifnum_to_if(cam->usbdev, 0), id))
 138                 return cam;
 139
 140         return NULL;
 141 }
 142
 143 void
 144 zc0301_attach_sensor(struct zc0301_device* cam, struct zc0301_sensor* sensor)
 145 {
 146         memcpy(&cam->sensor, sensor, sizeof(struct zc0301_sensor));
 147 }
 148
 149 /*****************************************************************************/
 150
 151 #undef DBG
 152 #undef KDBG
 153 #ifdef ZC0301_DEBUG
 154 #       define DBG(level, fmt, args...)                                       \
 155 do {                                                                          \
 156         if (debug >= (level)) {                                               \
 157                 if ((level) == 1)                                             \
 158                         dev_err(&cam->usbdev->dev, fmt "\n", ## args);        \
 159                 else if ((level) == 2)                                        \
 160                         dev_info(&cam->usbdev->dev, fmt "\n", ## args);       \
 161                 else if ((level) >= 3)                                        \
 162                         dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n",      \
 163                                  __FUNCTION__, __LINE__ , ## args);           \
 164         }                                                                     \
 165 } while (0)
 166 #       define KDBG(level, fmt, args...)                                      \
 167 do {                                                                          \
 168         if (debug >= (level)) {                                               \
 169                 if ((level) == 1 || (level) == 2)                             \
 170                         pr_info("zc0301: " fmt "\n", ## args);                \
 171                 else if ((level) == 3)                                        \
 172                         pr_debug("zc0301: [%s:%d] " fmt "\n", __FUNCTION__,   \
 173                                  __LINE__ , ## args);                         \
 174         }                                                                     \
 175 } while (0)
 176 #       define V4LDBG(level, name, cmd)                                       \
 177 do {                                                                          \
 178         if (debug >= (level))                                                 \
 179                 v4l_print_ioctl(name, cmd);                                   \
 180 } while (0)
 181 #else
 182 #       define DBG(level, fmt, args...) do {;} while(0)
 183 #       define KDBG(level, fmt, args...) do {;} while(0)
 184 #       define V4LDBG(level, name, cmd) do {;} while(0)
 185 #endif
 186
 187 #undef PDBG
 188 #define PDBG(fmt, args...)                                                    \
 189 dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n",                              \
 190          __FUNCTION__, __LINE__ , ## args)
 191
 192 #undef PDBGG
 193 #define PDBGG(fmt, args...) do {;} while(0) /* placeholder */
 194
 195 #endif /* _ZC0301_H_ */