drivers/media/video/sn9c102/sn9c102.h

   1 /***************************************************************************
   2  * V4L2 driver for SN9C1xx PC Camera Controllers                           *
   3  *                                                                         *
   4  * Copyright (C) 2004-2006 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 _SN9C102_H_
  22 #define _SN9C102_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/rwsem.h>
  36 #include <linux/mutex.h>
  37 #include <linux/string.h>
  38 #include <linux/stddef.h>
  39
  40 #include "sn9c102_config.h"
  41 #include "sn9c102_sensor.h"
  42 #include "sn9c102_devtable.h"
  43
  44
  45 enum sn9c102_frame_state {
  46         F_UNUSED,
  47         F_QUEUED,
  48         F_GRABBING,
  49         F_DONE,
  50         F_ERROR,
  51 };
  52
  53 struct sn9c102_frame_t {
  54         void* bufmem;
  55         struct v4l2_buffer buf;
  56         enum sn9c102_frame_state state;
  57         struct list_head frame;
  58         unsigned long vma_use_count;
  59 };
  60
  61 enum sn9c102_dev_state {
  62         DEV_INITIALIZED = 0x01,
  63         DEV_DISCONNECTED = 0x02,
  64         DEV_MISCONFIGURED = 0x04,
  65 };
  66
  67 enum sn9c102_io_method {
  68         IO_NONE,
  69         IO_READ,
  70         IO_MMAP,
  71 };
  72
  73 enum sn9c102_stream_state {
  74         STREAM_OFF,
  75         STREAM_INTERRUPT,
  76         STREAM_ON,
  77 };
  78
  79 typedef char sn9c102_sof_header_t[62];
  80
  81 struct sn9c102_sysfs_attr {
  82         u8 reg, i2c_reg;
  83         sn9c102_sof_header_t frame_header;
  84 };
  85
  86 struct sn9c102_module_param {
  87         u8 force_munmap;
  88         u16 frame_timeout;
  89 };
  90
  91 static DEFINE_MUTEX(sn9c102_sysfs_lock);
  92 static DECLARE_RWSEM(sn9c102_disconnect);
  93
  94 struct sn9c102_device {
  95         struct video_device* v4ldev;
  96
  97         enum sn9c102_bridge bridge;
  98         struct sn9c102_sensor sensor;
  99
 100         struct usb_device* usbdev;
 101         struct urb* urb[SN9C102_URBS];
 102         void* transfer_buffer[SN9C102_URBS];
 103         u8* control_buffer;
 104
 105         struct sn9c102_frame_t *frame_current, frame[SN9C102_MAX_FRAMES];
 106         struct list_head inqueue, outqueue;
 107         u32 frame_count, nbuffers, nreadbuffers;
 108
 109         enum sn9c102_io_method io;
 110         enum sn9c102_stream_state stream;
 111
 112         struct v4l2_jpegcompression compression;
 113
 114         struct sn9c102_sysfs_attr sysfs;
 115         sn9c102_sof_header_t sof_header;
 116         u16 reg[384];
 117
 118         struct sn9c102_module_param module_param;
 119
 120         enum sn9c102_dev_state state;
 121         u8 users;
 122
 123         struct mutex dev_mutex, fileop_mutex;
 124         spinlock_t queue_lock;
 125         wait_queue_head_t open, wait_frame, wait_stream;
 126 };
 127
 128 /*****************************************************************************/
 129
 130 struct sn9c102_device*
 131 sn9c102_match_id(struct sn9c102_device* cam, const struct usb_device_id *id)
 132 {
 133         return usb_match_id(usb_ifnum_to_if(cam->usbdev, 0), id) ? cam : NULL;
 134 }
 135
 136
 137 void
 138 sn9c102_attach_sensor(struct sn9c102_device* cam,
 139                       struct sn9c102_sensor* sensor)
 140 {
 141         memcpy(&cam->sensor, sensor, sizeof(struct sn9c102_sensor));
 142 }
 143
 144
 145 enum sn9c102_bridge
 146 sn9c102_get_bridge(struct sn9c102_device* cam)
 147 {
 148         return cam->bridge;
 149 }
 150
 151
 152 struct sn9c102_sensor* sn9c102_get_sensor(struct sn9c102_device* cam)
 153 {
 154         return &cam->sensor;
 155 }
 156
 157 /*****************************************************************************/
 158
 159 #undef DBG
 160 #undef KDBG
 161 #ifdef SN9C102_DEBUG
 162 #       define DBG(level, fmt, args...)                                       \
 163 do {                                                                          \
 164         if (debug >= (level)) {                                               \
 165                 if ((level) == 1)                                             \
 166                         dev_err(&cam->usbdev->dev, fmt "\n", ## args);        \
 167                 else if ((level) == 2)                                        \
 168                         dev_info(&cam->usbdev->dev, fmt "\n", ## args);       \
 169                 else if ((level) >= 3)                                        \
 170                         dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n",      \
 171                                  __FUNCTION__, __LINE__ , ## args);           \
 172         }                                                                     \
 173 } while (0)
 174 #       define V4LDBG(level, name, cmd)                                       \
 175 do {                                                                          \
 176         if (debug >= (level))                                                 \
 177                 v4l_print_ioctl(name, cmd);                                   \
 178 } while (0)
 179 #       define KDBG(level, fmt, args...)                                      \
 180 do {                                                                          \
 181         if (debug >= (level)) {                                               \
 182                 if ((level) == 1 || (level) == 2)                             \
 183                         pr_info("sn9c102: " fmt "\n", ## args);               \
 184                 else if ((level) == 3)                                        \
 185                         pr_debug("sn9c102: [%s:%d] " fmt "\n", __FUNCTION__,  \
 186                                  __LINE__ , ## args);                         \
 187         }                                                                     \
 188 } while (0)
 189 #else
 190 #       define DBG(level, fmt, args...) do {;} while(0)
 191 #       define V4LDBG(level, name, cmd) do {;} while(0)
 192 #       define KDBG(level, fmt, args...) do {;} while(0)
 193 #endif
 194
 195 #undef PDBG
 196 #define PDBG(fmt, args...)                                                    \
 197 dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n",                              \
 198          __FUNCTION__, __LINE__ , ## args)
 199
 200 #undef PDBGG
 201 #define PDBGG(fmt, args...) do {;} while(0) /* placeholder */
 202
 203 #endif /* _SN9C102_H_ */