drivers/usb/media/sn9c102.h

   1 /***************************************************************************
   2  * V4L2 driver for SN9C10x 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 <asm/semaphore.h>
  37
  38 #include "sn9c102_sensor.h"
  39
  40 /*****************************************************************************/
  41
  42 #define SN9C102_DEBUG
  43 #define SN9C102_DEBUG_LEVEL       2
  44 #define SN9C102_MAX_DEVICES       64
  45 #define SN9C102_PRESERVE_IMGSCALE 0
  46 #define SN9C102_FORCE_MUNMAP      0
  47 #define SN9C102_MAX_FRAMES        32
  48 #define SN9C102_URBS              2
  49 #define SN9C102_ISO_PACKETS       7
  50 #define SN9C102_ALTERNATE_SETTING 8
  51 #define SN9C102_URB_TIMEOUT       msecs_to_jiffies(2 * SN9C102_ISO_PACKETS)
  52 #define SN9C102_CTRL_TIMEOUT      300
  53
  54 /*****************************************************************************/
  55
  56 enum sn9c102_bridge {
  57         BRIDGE_SN9C101 = 0x01,
  58         BRIDGE_SN9C102 = 0x02,
  59         BRIDGE_SN9C103 = 0x04,
  60 };
  61
  62 SN9C102_ID_TABLE
  63 SN9C102_SENSOR_TABLE
  64
  65 enum sn9c102_frame_state {
  66         F_UNUSED,
  67         F_QUEUED,
  68         F_GRABBING,
  69         F_DONE,
  70         F_ERROR,
  71 };
  72
  73 struct sn9c102_frame_t {
  74         void* bufmem;
  75         struct v4l2_buffer buf;
  76         enum sn9c102_frame_state state;
  77         struct list_head frame;
  78         unsigned long vma_use_count;
  79 };
  80
  81 enum sn9c102_dev_state {
  82         DEV_INITIALIZED = 0x01,
  83         DEV_DISCONNECTED = 0x02,
  84         DEV_MISCONFIGURED = 0x04,
  85 };
  86
  87 enum sn9c102_io_method {
  88         IO_NONE,
  89         IO_READ,
  90         IO_MMAP,
  91 };
  92
  93 enum sn9c102_stream_state {
  94         STREAM_OFF,
  95         STREAM_INTERRUPT,
  96         STREAM_ON,
  97 };
  98
  99 typedef char sn9c103_sof_header_t[18];
 100 typedef char sn9c102_sof_header_t[12];
 101 typedef char sn9c102_eof_header_t[4];
 102
 103 struct sn9c102_sysfs_attr {
 104         u8 reg, i2c_reg;
 105         sn9c103_sof_header_t frame_header;
 106 };
 107
 108 struct sn9c102_module_param {
 109         u8 force_munmap;
 110 };
 111
 112 static DECLARE_MUTEX(sn9c102_sysfs_lock);
 113 static DECLARE_RWSEM(sn9c102_disconnect);
 114
 115 struct sn9c102_device {
 116         struct video_device* v4ldev;
 117
 118         enum sn9c102_bridge bridge;
 119         struct sn9c102_sensor* sensor;
 120
 121         struct usb_device* usbdev;
 122         struct urb* urb[SN9C102_URBS];
 123         void* transfer_buffer[SN9C102_URBS];
 124         u8* control_buffer;
 125
 126         struct sn9c102_frame_t *frame_current, frame[SN9C102_MAX_FRAMES];
 127         struct list_head inqueue, outqueue;
 128         u32 frame_count, nbuffers, nreadbuffers;
 129
 130         enum sn9c102_io_method io;
 131         enum sn9c102_stream_state stream;
 132
 133         struct v4l2_jpegcompression compression;
 134
 135         struct sn9c102_sysfs_attr sysfs;
 136         sn9c103_sof_header_t sof_header;
 137         u16 reg[63];
 138
 139         struct sn9c102_module_param module_param;
 140
 141         enum sn9c102_dev_state state;
 142         u8 users;
 143
 144         struct semaphore dev_sem, fileop_sem;
 145         spinlock_t queue_lock;
 146         wait_queue_head_t open, wait_frame, wait_stream;
 147 };
 148
 149 /*****************************************************************************/
 150
 151 void
 152 sn9c102_attach_sensor(struct sn9c102_device* cam,
 153                       struct sn9c102_sensor* sensor)
 154 {
 155         cam->sensor = sensor;
 156         cam->sensor->usbdev = cam->usbdev;
 157 }
 158
 159 /*****************************************************************************/
 160
 161 #undef DBG
 162 #undef KDBG
 163 #ifdef SN9C102_DEBUG
 164 #       define DBG(level, fmt, args...)                                       \
 165 do {                                                                          \
 166         if (debug >= (level)) {                                               \
 167                 if ((level) == 1)                                             \
 168                         dev_err(&cam->usbdev->dev, fmt "\n", ## args);        \
 169                 else if ((level) == 2)                                        \
 170                         dev_info(&cam->usbdev->dev, fmt "\n", ## args);       \
 171                 else if ((level) >= 3)                                        \
 172                         dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n",      \
 173                                  __FUNCTION__, __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 #       define KDBG(level, fmt, args...)                                      \
 182 do {                                                                          \
 183         if (debug >= (level)) {                                               \
 184                 if ((level) == 1 || (level) == 2)                             \
 185                         pr_info("sn9c102: " fmt "\n", ## args);               \
 186                 else if ((level) == 3)                                        \
 187                         pr_debug("sn9c102: [%s:%d] " fmt "\n", __FUNCTION__,  \
 188                                  __LINE__ , ## args);                         \
 189         }                                                                     \
 190 } while (0)
 191 #else
 192 #       define DBG(level, fmt, args...) do {;} while(0)
 193 #       define V4LDBG(level, name, cmd) do {;} while(0)
 194 #       define KDBG(level, fmt, args...) do {;} while(0)
 195 #endif
 196
 197 #undef PDBG
 198 #define PDBG(fmt, args...)                                                    \
 199 dev_info(&cam->dev, "[%s:%d] " fmt "\n", __FUNCTION__, __LINE__ , ## args)
 200
 201 #undef PDBGG
 202 #define PDBGG(fmt, args...) do {;} while(0) /* placeholder */
 203
 204 #endif /* _SN9C102_H_ */