drivers/usb/media/sn9c102.h

   1 /***************************************************************************
   2  * V4L2 driver for SN9C10[12] PC Camera Controllers                        *
   3  *                                                                         *
   4  * Copyright (C) 2004 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 _SN9C102_H_
  22 #define _SN9C102_H_
  23
  24 #include <linux/version.h>
  25 #include <linux/usb.h>
  26 #include <linux/videodev.h>
  27 #include <linux/device.h>
  28 #include <linux/list.h>
  29 #include <linux/spinlock.h>
  30 #include <linux/wait.h>
  31 #include <linux/types.h>
  32 #include <linux/param.h>
  33 #include <linux/rwsem.h>
  34
  35 #include "sn9c102_sensor.h"
  36
  37 /*****************************************************************************/
  38
  39 #define SN9C102_DEBUG
  40 #define SN9C102_DEBUG_LEVEL       2
  41 #define SN9C102_MAX_DEVICES       64
  42 #define SN9C102_MAX_FRAMES        32
  43 #define SN9C102_URBS              2
  44 #define SN9C102_ISO_PACKETS       7
  45 #define SN9C102_ALTERNATE_SETTING 8
  46 #define SN9C102_CTRL_TIMEOUT      10*HZ
  47
  48 /*****************************************************************************/
  49
  50 #define SN9C102_MODULE_NAME  "V4L2 driver for SN9C10[12] PC Camera Controllers"
  51 #define SN9C102_MODULE_AUTHOR   "(C) 2004 Luca Risolia"
  52 #define SN9C102_AUTHOR_EMAIL    "<luca.risolia@studio.unibo.it>"
  53 #define SN9C102_MODULE_LICENSE  "GPL"
  54 #define SN9C102_MODULE_VERSION  "1:1.01-beta"
  55 #define SN9C102_MODULE_VERSION_CODE  KERNEL_VERSION(1, 0, 1)
  56
  57 SN9C102_ID_TABLE;
  58 SN9C102_SENSOR_TABLE;
  59
  60 enum sn9c102_frame_state {
  61         F_UNUSED,
  62         F_QUEUED,
  63         F_GRABBING,
  64         F_DONE,
  65         F_ERROR,
  66 };
  67
  68 struct sn9c102_frame_t {
  69         void* bufmem;
  70         struct v4l2_buffer buf;
  71         enum sn9c102_frame_state state;
  72         struct list_head frame;
  73         unsigned long vma_use_count;
  74 };
  75
  76 enum sn9c102_dev_state {
  77         DEV_INITIALIZED = 0x01,
  78         DEV_DISCONNECTED = 0x02,
  79         DEV_MISCONFIGURED = 0x04,
  80 };
  81
  82 enum sn9c102_io_method {
  83         IO_NONE,
  84         IO_READ,
  85         IO_MMAP,
  86 };
  87
  88 enum sn9c102_stream_state {
  89         STREAM_OFF,
  90         STREAM_INTERRUPT,
  91         STREAM_ON,
  92 };
  93
  94 struct sn9c102_sysfs_attr {
  95         u8 reg, val, i2c_reg, i2c_val;
  96 };
  97
  98 static DECLARE_MUTEX(sn9c102_sysfs_lock);
  99 static DECLARE_RWSEM(sn9c102_disconnect);
 100
 101 struct sn9c102_device {
 102         struct device dev;
 103
 104         struct video_device* v4ldev;
 105
 106         struct sn9c102_sensor* sensor;
 107
 108         struct usb_device* usbdev;
 109         struct urb* urb[SN9C102_URBS];
 110         void* transfer_buffer[SN9C102_URBS];
 111         u8* control_buffer;
 112
 113         struct sn9c102_frame_t *frame_current, frame[SN9C102_MAX_FRAMES];
 114         struct list_head inqueue, outqueue;
 115         u32 frame_count, nbuffers;
 116
 117         enum sn9c102_io_method io;
 118         enum sn9c102_stream_state stream;
 119
 120         struct sn9c102_sysfs_attr sysfs;
 121         u16 reg[32];
 122
 123         enum sn9c102_dev_state state;
 124         u8 users;
 125
 126         struct semaphore dev_sem, fileop_sem;
 127         spinlock_t queue_lock;
 128         wait_queue_head_t open, wait_frame, wait_stream;
 129 };
 130
 131 /*****************************************************************************/
 132
 133 void
 134 sn9c102_attach_sensor(struct sn9c102_device* cam,
 135                       struct sn9c102_sensor* sensor)
 136 {
 137         cam->sensor = sensor;
 138         cam->sensor->dev = &cam->dev;
 139         cam->sensor->usbdev = cam->usbdev;
 140 }
 141
 142 /*****************************************************************************/
 143
 144 #undef DBG
 145 #undef KDBG
 146 #ifdef SN9C102_DEBUG
 147 #       define DBG(level, fmt, args...)                                       \
 148 {                                                                             \
 149         if (debug >= (level)) {                                               \
 150                 if ((level) == 1)                                             \
 151                         dev_err(&cam->dev, fmt "\n", ## args);                \
 152                 else if ((level) == 2)                                        \
 153                         dev_info(&cam->dev, fmt "\n", ## args);               \
 154                 else if ((level) >= 3)                                        \
 155                         dev_info(&cam->dev, "[%s:%d] " fmt "\n",              \
 156                                  __FUNCTION__, __LINE__ , ## args);           \
 157         }                                                                     \
 158 }
 159 #       define KDBG(level, fmt, args...)                                      \
 160 {                                                                             \
 161         if (debug >= (level)) {                                               \
 162                 if ((level) == 1 || (level) == 2)                             \
 163                         pr_info("sn9c102: " fmt "\n", ## args);               \
 164                 else if ((level) == 3)                                        \
 165                         pr_debug("sn9c102: [%s:%d] " fmt "\n", __FUNCTION__,  \
 166                                  __LINE__ , ## args);                         \
 167         }                                                                     \
 168 }
 169 #else
 170 #       define KDBG(level, fmt, args...) do {;} while(0);
 171 #       define DBG(level, fmt, args...) do {;} while(0);
 172 #endif
 173
 174 #undef PDBG
 175 #define PDBG(fmt, args...)                                                    \
 176 dev_info(&cam->dev, "[%s:%d] " fmt "\n", __FUNCTION__, __LINE__ , ## args);
 177
 178 #undef PDBGG
 179 #define PDBGG(fmt, args...) do {;} while(0); /* placeholder */
 180
 181 #endif /* _SN9C102_H_ */