drivers/staging/media/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/usb.h>
  25 #include <linux/videodev2.h>
  26 #include <media/v4l2-common.h>
  27 #include <media/v4l2-ioctl.h>
  28 #include <media/v4l2-device.h>
  29 #include <linux/device.h>
  30 #include <linux/list.h>
  31 #include <linux/spinlock.h>
  32 #include <linux/time.h>
  33 #include <linux/wait.h>
  34 #include <linux/types.h>
  35 #include <linux/param.h>
  36 #include <linux/rwsem.h>
  37 #include <linux/mutex.h>
  38 #include <linux/string.h>
  39 #include <linux/stddef.h>
  40 #include <linux/kref.h>
  41
  42 #include "sn9c102_config.h"
  43 #include "sn9c102_sensor.h"
  44 #include "sn9c102_devtable.h"
  45
  46
  47 enum sn9c102_frame_state {
  48         F_UNUSED,
  49         F_QUEUED,
  50         F_GRABBING,
  51         F_DONE,
  52         F_ERROR,
  53 };
  54
  55 struct sn9c102_frame_t {
  56         void* bufmem;
  57         struct v4l2_buffer buf;
  58         enum sn9c102_frame_state state;
  59         struct list_head frame;
  60         unsigned long vma_use_count;
  61 };
  62
  63 enum sn9c102_dev_state {
  64         DEV_INITIALIZED = 0x01,
  65         DEV_DISCONNECTED = 0x02,
  66         DEV_MISCONFIGURED = 0x04,
  67 };
  68
  69 enum sn9c102_io_method {
  70         IO_NONE,
  71         IO_READ,
  72         IO_MMAP,
  73 };
  74
  75 enum sn9c102_stream_state {
  76         STREAM_OFF,
  77         STREAM_INTERRUPT,
  78         STREAM_ON,
  79 };
  80
  81 typedef char sn9c102_sof_header_t[62];
  82
  83 struct sn9c102_sof_t {
  84         sn9c102_sof_header_t header;
  85         u16 bytesread;
  86 };
  87
  88 struct sn9c102_sysfs_attr {
  89         u16 reg, i2c_reg;
  90         sn9c102_sof_header_t frame_header;
  91 };
  92
  93 struct sn9c102_module_param {
  94         u8 force_munmap;
  95         u16 frame_timeout;
  96 };
  97
  98 static DEFINE_MUTEX(sn9c102_sysfs_lock);
  99 static DECLARE_RWSEM(sn9c102_dev_lock);
 100
 101 struct sn9c102_device {
 102         struct video_device* v4ldev;
 103
 104         struct v4l2_device v4l2_dev;
 105
 106         enum sn9c102_bridge bridge;
 107         struct sn9c102_sensor sensor;
 108
 109         struct usb_device* usbdev;
 110         struct urb* urb[SN9C102_URBS];
 111         void* transfer_buffer[SN9C102_URBS];
 112         u8* control_buffer;
 113
 114         struct sn9c102_frame_t *frame_current, frame[SN9C102_MAX_FRAMES];
 115         struct list_head inqueue, outqueue;
 116         u32 frame_count, nbuffers, nreadbuffers;
 117
 118         enum sn9c102_io_method io;
 119         enum sn9c102_stream_state stream;
 120
 121         struct v4l2_jpegcompression compression;
 122
 123         struct sn9c102_sysfs_attr sysfs;
 124         struct sn9c102_sof_t sof;
 125         u16 reg[384];
 126
 127         struct sn9c102_module_param module_param;
 128
 129         struct kref kref;
 130         enum sn9c102_dev_state state;
 131         u8 users;
 132
 133         struct completion probe;
 134         struct mutex open_mutex, fileop_mutex;
 135         spinlock_t queue_lock;
 136         wait_queue_head_t wait_open, wait_frame, wait_stream;
 137 };
 138
 139 /*****************************************************************************/
 140
 141 struct sn9c102_device*
 142 sn9c102_match_id(struct sn9c102_device* cam, const struct usb_device_id *id)
 143 {
 144         return usb_match_id(usb_ifnum_to_if(cam->usbdev, 0), id) ? cam : NULL;
 145 }
 146
 147
 148 void
 149 sn9c102_attach_sensor(struct sn9c102_device* cam,
 150                       const struct sn9c102_sensor* sensor)
 151 {
 152         memcpy(&cam->sensor, sensor, sizeof(struct sn9c102_sensor));
 153 }
 154
 155
 156 enum sn9c102_bridge
 157 sn9c102_get_bridge(struct sn9c102_device* cam)
 158 {
 159         return cam->bridge;
 160 }
 161
 162
 163 struct sn9c102_sensor* sn9c102_get_sensor(struct sn9c102_device* cam)
 164 {
 165         return &cam->sensor;
 166 }
 167
 168 /*****************************************************************************/
 169
 170 #undef DBG
 171 #undef KDBG
 172 #ifdef SN9C102_DEBUG
 173 #       define DBG(level, fmt, args...)                                       \
 174 do {                                                                          \
 175         if (debug >= (level)) {                                               \
 176                 if ((level) == 1)                                             \
 177                         dev_err(&cam->usbdev->dev, fmt "\n", ## args);        \
 178                 else if ((level) == 2)                                        \
 179                         dev_info(&cam->usbdev->dev, fmt "\n", ## args);       \
 180                 else if ((level) >= 3)                                        \
 181                         dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n",      \
 182                                  __func__, __LINE__ , ## args);           \
 183         }                                                                     \
 184 } while (0)
 185 #       define V4LDBG(level, name, cmd)                                       \
 186 do {                                                                          \
 187         if (debug >= (level))                                                 \
 188                 v4l_printk_ioctl(name, cmd);                                  \
 189 } while (0)
 190 #       define KDBG(level, fmt, args...)                                      \
 191 do {                                                                          \
 192         if (debug >= (level)) {                                               \
 193                 if ((level) == 1 || (level) == 2)                             \
 194                         pr_info("sn9c102: " fmt "\n", ## args);               \
 195                 else if ((level) == 3)                                        \
 196                         pr_debug("sn9c102: [%s:%d] " fmt "\n",                \
 197                                  __func__, __LINE__ , ## args);           \
 198         }                                                                     \
 199 } while (0)
 200 #else
 201 #       define DBG(level, fmt, args...) do {;} while(0)
 202 #       define V4LDBG(level, name, cmd) do {;} while(0)
 203 #       define KDBG(level, fmt, args...) do {;} while(0)
 204 #endif
 205
 206 #undef PDBG
 207 #define PDBG(fmt, args...)                                                    \
 208 dev_info(&cam->usbdev->dev, "[%s:%s:%d] " fmt "\n", __FILE__, __func__,   \
 209          __LINE__ , ## args)
 210
 211 #undef PDBGG
 212 #define PDBGG(fmt, args...) do {;} while(0) /* placeholder */
 213
 214 #endif /* _SN9C102_H_ */