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/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/stddef.h>
  38 #include <linux/string.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, 0x6151), },
  62         { USB_DEVICE(0x102c, 0x6251), },
  63         { USB_DEVICE(0x102c, 0x6253), },
  64         { USB_DEVICE(0x102c, 0x6254), },
  65         { USB_DEVICE(0x102c, 0x6255), },
  66         { USB_DEVICE(0x102c, 0x6256), },
  67         { USB_DEVICE(0x102c, 0x6257), },
  68         { USB_DEVICE(0x102c, 0x6258), },
  69         { USB_DEVICE(0x102c, 0x6259), },
  70         { USB_DEVICE(0x102c, 0x625a), },
  71         { USB_DEVICE(0x102c, 0x625b), },
  72         { USB_DEVICE(0x102c, 0x625c), },
  73         { USB_DEVICE(0x102c, 0x625d), },
  74         { USB_DEVICE(0x102c, 0x625e), },
  75         { USB_DEVICE(0x102c, 0x625f), },
  76         { USB_DEVICE(0x102c, 0x6260), },
  77         { USB_DEVICE(0x102c, 0x6261), },
  78         { USB_DEVICE(0x102c, 0x6262), },
  79         { USB_DEVICE(0x102c, 0x6263), },
  80         { USB_DEVICE(0x102c, 0x6264), },
  81         { USB_DEVICE(0x102c, 0x6265), },
  82         { USB_DEVICE(0x102c, 0x6266), },
  83         { USB_DEVICE(0x102c, 0x6267), },
  84         { USB_DEVICE(0x102c, 0x6268), },
  85         { USB_DEVICE(0x102c, 0x6269), },
  86         { }
  87 };
  88
  89 ET61X251_SENSOR_TABLE
  90
  91 /*****************************************************************************/
  92
  93 enum et61x251_frame_state {
  94         F_UNUSED,
  95         F_QUEUED,
  96         F_GRABBING,
  97         F_DONE,
  98         F_ERROR,
  99 };
 100
 101 struct et61x251_frame_t {
 102         void* bufmem;
 103         struct v4l2_buffer buf;
 104         enum et61x251_frame_state state;
 105         struct list_head frame;
 106         unsigned long vma_use_count;
 107 };
 108
 109 enum et61x251_dev_state {
 110         DEV_INITIALIZED = 0x01,
 111         DEV_DISCONNECTED = 0x02,
 112         DEV_MISCONFIGURED = 0x04,
 113 };
 114
 115 enum et61x251_io_method {
 116         IO_NONE,
 117         IO_READ,
 118         IO_MMAP,
 119 };
 120
 121 enum et61x251_stream_state {
 122         STREAM_OFF,
 123         STREAM_INTERRUPT,
 124         STREAM_ON,
 125 };
 126
 127 struct et61x251_sysfs_attr {
 128         u8 reg, i2c_reg;
 129 };
 130
 131 struct et61x251_module_param {
 132         u8 force_munmap;
 133         u16 frame_timeout;
 134 };
 135
 136 static DEFINE_MUTEX(et61x251_sysfs_lock);
 137 static DECLARE_RWSEM(et61x251_disconnect);
 138
 139 struct et61x251_device {
 140         struct video_device* v4ldev;
 141
 142         struct et61x251_sensor sensor;
 143
 144         struct usb_device* usbdev;
 145         struct urb* urb[ET61X251_URBS];
 146         void* transfer_buffer[ET61X251_URBS];
 147         u8* control_buffer;
 148
 149         struct et61x251_frame_t *frame_current, frame[ET61X251_MAX_FRAMES];
 150         struct list_head inqueue, outqueue;
 151         u32 frame_count, nbuffers, nreadbuffers;
 152
 153         enum et61x251_io_method io;
 154         enum et61x251_stream_state stream;
 155
 156         struct v4l2_jpegcompression compression;
 157
 158         struct et61x251_sysfs_attr sysfs;
 159         struct et61x251_module_param module_param;
 160
 161         enum et61x251_dev_state state;
 162         u8 users;
 163
 164         struct mutex dev_mutex, fileop_mutex;
 165         spinlock_t queue_lock;
 166         wait_queue_head_t open, wait_frame, wait_stream;
 167 };
 168
 169 /*****************************************************************************/
 170
 171 struct et61x251_device*
 172 et61x251_match_id(struct et61x251_device* cam, const struct usb_device_id *id)
 173 {
 174         if (usb_match_id(usb_ifnum_to_if(cam->usbdev, 0), id))
 175                 return cam;
 176
 177         return NULL;
 178 }
 179
 180
 181 void
 182 et61x251_attach_sensor(struct et61x251_device* cam,
 183                        struct et61x251_sensor* sensor)
 184 {
 185         memcpy(&cam->sensor, sensor, sizeof(struct et61x251_sensor));
 186 }
 187
 188 /*****************************************************************************/
 189
 190 #undef DBG
 191 #undef KDBG
 192 #ifdef ET61X251_DEBUG
 193 #       define DBG(level, fmt, args...)                                       \
 194 do {                                                                          \
 195         if (debug >= (level)) {                                               \
 196                 if ((level) == 1)                                             \
 197                         dev_err(&cam->usbdev->dev, fmt "\n", ## args);        \
 198                 else if ((level) == 2)                                        \
 199                         dev_info(&cam->usbdev->dev, fmt "\n", ## args);       \
 200                 else if ((level) >= 3)                                        \
 201                         dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n",      \
 202                                  __FUNCTION__, __LINE__ , ## args);           \
 203         }                                                                     \
 204 } while (0)
 205 #       define KDBG(level, fmt, args...)                                      \
 206 do {                                                                          \
 207         if (debug >= (level)) {                                               \
 208                 if ((level) == 1 || (level) == 2)                             \
 209                         pr_info("et61x251: " fmt "\n", ## args);              \
 210                 else if ((level) == 3)                                        \
 211                         pr_debug("et61x251: [%s:%d] " fmt "\n", __FUNCTION__, \
 212                                  __LINE__ , ## args);                         \
 213         }                                                                     \
 214 } while (0)
 215 #       define V4LDBG(level, name, cmd)                                       \
 216 do {                                                                          \
 217         if (debug >= (level))                                                 \
 218                 v4l_print_ioctl(name, cmd);                                   \
 219 } while (0)
 220 #else
 221 #       define DBG(level, fmt, args...) do {;} while(0)
 222 #       define KDBG(level, fmt, args...) do {;} while(0)
 223 #       define V4LDBG(level, name, cmd) do {;} while(0)
 224 #endif
 225
 226 #undef PDBG
 227 #define PDBG(fmt, args...)                                                    \
 228 dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n",                              \
 229          __FUNCTION__, __LINE__ , ## args)
 230
 231 #undef PDBGG
 232 #define PDBGG(fmt, args...) do {;} while(0) /* placeholder */
 233
 234 #endif /* _ET61X251_H_ */