drivers/media/video/et61x251/et61x251.h

   1 /***************************************************************************
   2  * V4L2 driver for ET61X[12]51 PC Camera Controllers                       *
   3  *                                                                         *
   4  * Copyright (C) 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 _ET61X251_H_
  22 #define _ET61X251_H_
  23
  24 #include <linux/usb.h>
  25 #include <linux/videodev2.h>
  26 #include <media/v4l2-common.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 <linux/mutex.h>
  36 #include <linux/stddef.h>
  37 #include <linux/string.h>
  38 #include <linux/kref.h>
  39
  40 #include "et61x251_sensor.h"
  41
  42 /*****************************************************************************/
  43
  44 #define ET61X251_DEBUG
  45 #define ET61X251_DEBUG_LEVEL         2
  46 #define ET61X251_MAX_DEVICES         64
  47 #define ET61X251_PRESERVE_IMGSCALE   0
  48 #define ET61X251_FORCE_MUNMAP        0
  49 #define ET61X251_MAX_FRAMES          32
  50 #define ET61X251_COMPRESSION_QUALITY 0
  51 #define ET61X251_URBS                2
  52 #define ET61X251_ISO_PACKETS         7
  53 #define ET61X251_ALTERNATE_SETTING   13
  54 #define ET61X251_URB_TIMEOUT         msecs_to_jiffies(2 * ET61X251_ISO_PACKETS)
  55 #define ET61X251_CTRL_TIMEOUT        100
  56 #define ET61X251_FRAME_TIMEOUT       2
  57
  58 /*****************************************************************************/
  59
  60 static const struct usb_device_id et61x251_id_table[] = {
  61         { USB_DEVICE(0x102c, 0x6251), },
  62         { }
  63 };
  64
  65 ET61X251_SENSOR_TABLE
  66
  67 /*****************************************************************************/
  68
  69 enum et61x251_frame_state {
  70         F_UNUSED,
  71         F_QUEUED,
  72         F_GRABBING,
  73         F_DONE,
  74         F_ERROR,
  75 };
  76
  77 struct et61x251_frame_t {
  78         void* bufmem;
  79         struct v4l2_buffer buf;
  80         enum et61x251_frame_state state;
  81         struct list_head frame;
  82         unsigned long vma_use_count;
  83 };
  84
  85 enum et61x251_dev_state {
  86         DEV_INITIALIZED = 0x01,
  87         DEV_DISCONNECTED = 0x02,
  88         DEV_MISCONFIGURED = 0x04,
  89 };
  90
  91 enum et61x251_io_method {
  92         IO_NONE,
  93         IO_READ,
  94         IO_MMAP,
  95 };
  96
  97 enum et61x251_stream_state {
  98         STREAM_OFF,
  99         STREAM_INTERRUPT,
 100         STREAM_ON,
 101 };
 102
 103 struct et61x251_sysfs_attr {
 104         u8 reg, i2c_reg;
 105 };
 106
 107 struct et61x251_module_param {
 108         u8 force_munmap;
 109         u16 frame_timeout;
 110 };
 111
 112 static DEFINE_MUTEX(et61x251_sysfs_lock);
 113 static DECLARE_RWSEM(et61x251_dev_lock);
 114
 115 struct et61x251_device {
 116         struct video_device* v4ldev;
 117
 118         struct et61x251_sensor sensor;
 119
 120         struct usb_device* usbdev;
 121         struct urb* urb[ET61X251_URBS];
 122         void* transfer_buffer[ET61X251_URBS];
 123         u8* control_buffer;
 124
 125         struct et61x251_frame_t *frame_current, frame[ET61X251_MAX_FRAMES];
 126         struct list_head inqueue, outqueue;
 127         u32 frame_count, nbuffers, nreadbuffers;
 128
 129         enum et61x251_io_method io;
 130         enum et61x251_stream_state stream;
 131
 132         struct v4l2_jpegcompression compression;
 133
 134         struct et61x251_sysfs_attr sysfs;
 135         struct et61x251_module_param module_param;
 136
 137         struct kref kref;
 138         enum et61x251_dev_state state;
 139         u8 users;
 140
 141         struct completion probe;
 142         struct mutex open_mutex, fileop_mutex;
 143         spinlock_t queue_lock;
 144         wait_queue_head_t wait_open, wait_frame, wait_stream;
 145 };
 146
 147 /*****************************************************************************/
 148
 149 struct et61x251_device*
 150 et61x251_match_id(struct et61x251_device* cam, const struct usb_device_id *id)
 151 {
 152         return usb_match_id(usb_ifnum_to_if(cam->usbdev, 0), id) ? cam : NULL;
 153 }
 154
 155
 156 void
 157 et61x251_attach_sensor(struct et61x251_device* cam,
 158                        const struct et61x251_sensor* sensor)
 159 {
 160         memcpy(&cam->sensor, sensor, sizeof(struct et61x251_sensor));
 161 }
 162
 163 /*****************************************************************************/
 164
 165 #undef DBG
 166 #undef KDBG
 167 #ifdef ET61X251_DEBUG
 168 #define DBG(level, fmt, ...)                                            \
 169 do {                                                                    \
 170         if (debug >= (level)) {                                         \
 171                 if ((level) == 1)                                       \
 172                         dev_err(&cam->usbdev->dev, fmt "\n",            \
 173                                 ##__VA_ARGS__);                         \
 174                 else if ((level) == 2)                                  \
 175                         dev_info(&cam->usbdev->dev, fmt "\n",           \
 176                                  ##__VA_ARGS__);                        \
 177                 else if ((level) >= 3)                                  \
 178                         dev_info(&cam->usbdev->dev, "[%s:%s:%d] " fmt "\n", \
 179                                  __FILE__, __func__, __LINE__,          \
 180                                  ##__VA_ARGS__);                        \
 181         }                                                               \
 182 } while (0)
 183 #define KDBG(level, fmt, ...)                                           \
 184 do {                                                                    \
 185         if (debug >= (level)) {                                         \
 186                 if ((level) == 1 || (level) == 2)                       \
 187                         pr_info(fmt "\n", ##__VA_ARGS__);               \
 188                 else if ((level) == 3)                                  \
 189                         pr_debug("[%s:%s:%d] " fmt "\n",                \
 190                                  __FILE__,  __func__, __LINE__,         \
 191                                  ##__VA_ARGS__);                        \
 192         }                                                               \
 193 } while (0)
 194 #define V4LDBG(level, name, cmd)                                        \
 195 do {                                                                    \
 196         if (debug >= (level))                                           \
 197                 v4l_print_ioctl(name, cmd);                             \
 198 } while (0)
 199 #else
 200 #define DBG(level, fmt, ...) do {;} while(0)
 201 #define KDBG(level, fmt, ...) do {;} while(0)
 202 #define V4LDBG(level, name, cmd) do {;} while(0)
 203 #endif
 204
 205 #undef PDBG
 206 #define PDBG(fmt, ...)                                                  \
 207         dev_info(&cam->usbdev->dev, "[%s:%s:%d] " fmt "\n",             \
 208                  __FILE__, __func__, __LINE__, ##__VA_ARGS__)
 209
 210 #undef PDBGG
 211 #define PDBGG(fmt, args...) do {;} while (0) /* placeholder */
 212
 213 #endif /* _ET61X251_H_ */