drivers/usb/media/sn9c102.h

   1 /***************************************************************************
   2  * V4L2 driver for SN9C10x 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/time.h>
  31 #include <linux/wait.h>
  32 #include <linux/types.h>
  33 #include <linux/param.h>
  34 #include <linux/rwsem.h>
  35 #include <asm/semaphore.h>
  36
  37 #include "sn9c102_sensor.h"
  38
  39 /*****************************************************************************/
  40
  41 #define SN9C102_DEBUG
  42 #define SN9C102_DEBUG_LEVEL       2
  43 #define SN9C102_MAX_DEVICES       64
  44 #define SN9C102_PRESERVE_IMGSCALE 0
  45 #define SN9C102_MAX_FRAMES        32
  46 #define SN9C102_URBS              2
  47 #define SN9C102_ISO_PACKETS       7
  48 #define SN9C102_ALTERNATE_SETTING 8
  49 #define SN9C102_URB_TIMEOUT       msecs_to_jiffies(3)
  50 #define SN9C102_CTRL_TIMEOUT      msecs_to_jiffies(100)
  51
  52 /*****************************************************************************/
  53
  54 #define SN9C102_MODULE_NAME     "V4L2 driver for SN9C10x PC Camera Controllers"
  55 #define SN9C102_MODULE_AUTHOR   "(C) 2004 Luca Risolia"
  56 #define SN9C102_AUTHOR_EMAIL    "<luca.risolia@studio.unibo.it>"
  57 #define SN9C102_MODULE_LICENSE  "GPL"
  58 #define SN9C102_MODULE_VERSION  "1:1.19"
  59 #define SN9C102_MODULE_VERSION_CODE  KERNEL_VERSION(1, 0, 19)
  60
  61 enum sn9c102_bridge {
  62         BRIDGE_SN9C101 = 0x01,
  63         BRIDGE_SN9C102 = 0x02,
  64         BRIDGE_SN9C103 = 0x04,
  65 };
  66
  67 SN9C102_ID_TABLE
  68 SN9C102_SENSOR_TABLE
  69
  70 enum sn9c102_frame_state {
  71         F_UNUSED,
  72         F_QUEUED,
  73         F_GRABBING,
  74         F_DONE,
  75         F_ERROR,
  76 };
  77
  78 struct sn9c102_frame_t {
  79         void* bufmem;
  80         struct v4l2_buffer buf;
  81         enum sn9c102_frame_state state;
  82         struct list_head frame;
  83         unsigned long vma_use_count;
  84 };
  85
  86 enum sn9c102_dev_state {
  87         DEV_INITIALIZED = 0x01,
  88         DEV_DISCONNECTED = 0x02,
  89         DEV_MISCONFIGURED = 0x04,
  90 };
  91
  92 enum sn9c102_io_method {
  93         IO_NONE,
  94         IO_READ,
  95         IO_MMAP,
  96 };
  97
  98 enum sn9c102_stream_state {
  99         STREAM_OFF,
 100         STREAM_INTERRUPT,
 101         STREAM_ON,
 102 };
 103
 104 struct sn9c102_sysfs_attr {
 105         u8 reg, i2c_reg;
 106 };
 107
 108 static DECLARE_MUTEX(sn9c102_sysfs_lock);
 109 static DECLARE_RWSEM(sn9c102_disconnect);
 110
 111 struct sn9c102_device {
 112         struct device dev;
 113
 114         struct video_device* v4ldev;
 115
 116         enum sn9c102_bridge bridge;
 117         struct sn9c102_sensor* sensor;
 118
 119         struct usb_device* usbdev;
 120         struct urb* urb[SN9C102_URBS];
 121         void* transfer_buffer[SN9C102_URBS];
 122         u8* control_buffer;
 123
 124         struct sn9c102_frame_t *frame_current, frame[SN9C102_MAX_FRAMES];
 125         struct list_head inqueue, outqueue;
 126         u32 frame_count, nbuffers, nreadbuffers;
 127
 128         enum sn9c102_io_method io;
 129         enum sn9c102_stream_state stream;
 130
 131         struct v4l2_jpegcompression compression;
 132
 133         struct sn9c102_sysfs_attr sysfs;
 134         u16 reg[32];
 135
 136         enum sn9c102_dev_state state;
 137         u8 users;
 138
 139         struct semaphore dev_sem, fileop_sem;
 140         spinlock_t queue_lock;
 141         wait_queue_head_t open, wait_frame, wait_stream;
 142 };
 143
 144 /*****************************************************************************/
 145
 146 void
 147 sn9c102_attach_sensor(struct sn9c102_device* cam,
 148                       struct sn9c102_sensor* sensor)
 149 {
 150         cam->sensor = sensor;
 151         cam->sensor->dev = &cam->dev;
 152         cam->sensor->usbdev = cam->usbdev;
 153 }
 154
 155 /*****************************************************************************/
 156
 157 #undef DBG
 158 #undef KDBG
 159 #ifdef SN9C102_DEBUG
 160 #       define DBG(level, fmt, args...)                                       \
 161 {                                                                             \
 162         if (debug >= (level)) {                                               \
 163                 if ((level) == 1)                                             \
 164                         dev_err(&cam->dev, fmt "\n", ## args);                \
 165                 else if ((level) == 2)                                        \
 166                         dev_info(&cam->dev, fmt "\n", ## args);               \
 167                 else if ((level) >= 3)                                        \
 168                         dev_info(&cam->dev, "[%s:%d] " fmt "\n",              \
 169                                  __FUNCTION__, __LINE__ , ## args);           \
 170         }                                                                     \
 171 }
 172 #       define KDBG(level, fmt, args...)                                      \
 173 {                                                                             \
 174         if (debug >= (level)) {                                               \
 175                 if ((level) == 1 || (level) == 2)                             \
 176                         pr_info("sn9c102: " fmt "\n", ## args);               \
 177                 else if ((level) == 3)                                        \
 178                         pr_debug("sn9c102: [%s:%d] " fmt "\n", __FUNCTION__,  \
 179                                  __LINE__ , ## args);                         \
 180         }                                                                     \
 181 }
 182 #else
 183 #       define KDBG(level, fmt, args...) do {;} while(0);
 184 #       define DBG(level, fmt, args...) do {;} while(0);
 185 #endif
 186
 187 #undef PDBG
 188 #define PDBG(fmt, args...)                                                    \
 189 dev_info(&cam->dev, "[%s:%d] " fmt "\n", __FUNCTION__, __LINE__ , ## args);
 190
 191 #undef PDBGG
 192 #define PDBGG(fmt, args...) do {;} while(0); /* placeholder */
 193
 194 #endif /* _SN9C102_H_ */