drivers/media/video/w9968cf.h

   1 /***************************************************************************
   2  * Video4Linux driver for W996[87]CF JPEG USB Dual Mode Camera Chip.       *
   3  *                                                                         *
   4  * Copyright (C) 2002-2004 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 _W9968CF_H_
  22 #define _W9968CF_H_
  23
  24 #include <linux/videodev2.h>
  25 #include <linux/usb.h>
  26 #include <linux/i2c.h>
  27 #include <linux/device.h>
  28 #include <linux/spinlock.h>
  29 #include <linux/list.h>
  30 #include <linux/wait.h>
  31 #include <linux/param.h>
  32 #include <linux/types.h>
  33 #include <linux/rwsem.h>
  34 #include <linux/mutex.h>
  35
  36 #include <media/v4l2-device.h>
  37 #include <media/ovcamchip.h>
  38
  39 #include "w9968cf_vpp.h"
  40
  41
  42 /****************************************************************************
  43  * Default values                                                           *
  44  ****************************************************************************/
  45
  46 #define W9968CF_VPPMOD_LOAD     1  /* automatic 'w9968cf-vpp' module loading */
  47
  48 /* Comment/uncomment the following line to enable/disable debugging messages */
  49 #define W9968CF_DEBUG
  50
  51 /* These have effect only if W9968CF_DEBUG is defined */
  52 #define W9968CF_DEBUG_LEVEL    2 /* from 0 to 6. 0 for no debug informations */
  53 #define W9968CF_SPECIFIC_DEBUG 0 /* 0 or 1 */
  54
  55 #define W9968CF_MAX_DEVICES    32
  56 #define W9968CF_SIMCAMS        W9968CF_MAX_DEVICES /* simultaneous cameras */
  57
  58 #define W9968CF_MAX_BUFFERS   32
  59 #define W9968CF_BUFFERS       2 /* n. of frame buffers from 2 to MAX_BUFFERS */
  60
  61 /* Maximum data payload sizes in bytes for alternate settings */
  62 static const u16 wMaxPacketSize[] = {1023, 959, 895, 831, 767, 703, 639, 575,
  63                                       511, 447, 383, 319, 255, 191, 127,  63};
  64 #define W9968CF_PACKET_SIZE      1023 /* according to wMaxPacketSizes[] */
  65 #define W9968CF_MIN_PACKET_SIZE  63 /* minimum value */
  66 #define W9968CF_ISO_PACKETS      5 /* n.of packets for isochronous transfers */
  67 #define W9968CF_USB_CTRL_TIMEOUT 1000 /* timeout (ms) for usb control commands */
  68 #define W9968CF_URBS             2 /* n. of scheduled URBs for ISO transfer */
  69
  70 #define W9968CF_I2C_BUS_DELAY    4 /* delay in us for I2C bit r/w operations */
  71 #define W9968CF_I2C_RW_RETRIES   15 /* number of max I2C r/w retries */
  72
  73 /* Available video formats */
  74 struct w9968cf_format {
  75         const u16 palette;
  76         const u16 depth;
  77         const u8 compression;
  78 };
  79
  80 static const struct w9968cf_format w9968cf_formatlist[] = {
  81         { VIDEO_PALETTE_UYVY,    16, 0 }, /* original video */
  82         { VIDEO_PALETTE_YUV422P, 16, 1 }, /* with JPEG compression */
  83         { VIDEO_PALETTE_YUV420P, 12, 1 }, /* with JPEG compression */
  84         { VIDEO_PALETTE_YUV420,  12, 1 }, /* same as YUV420P */
  85         { VIDEO_PALETTE_YUYV,    16, 0 }, /* software conversion */
  86         { VIDEO_PALETTE_YUV422,  16, 0 }, /* software conversion */
  87         { VIDEO_PALETTE_GREY,     8, 0 }, /* software conversion */
  88         { VIDEO_PALETTE_RGB555,  16, 0 }, /* software conversion */
  89         { VIDEO_PALETTE_RGB565,  16, 0 }, /* software conversion */
  90         { VIDEO_PALETTE_RGB24,   24, 0 }, /* software conversion */
  91         { VIDEO_PALETTE_RGB32,   32, 0 }, /* software conversion */
  92         { 0,                      0, 0 }  /* 0 is a terminating entry */
  93 };
  94
  95 #define W9968CF_DECOMPRESSION    2 /* decomp:0=disable,1=force,2=any formats */
  96 #define W9968CF_PALETTE_DECOMP_OFF   VIDEO_PALETTE_UYVY    /* when decomp=0 */
  97 #define W9968CF_PALETTE_DECOMP_FORCE VIDEO_PALETTE_YUV420P /* when decomp=1 */
  98 #define W9968CF_PALETTE_DECOMP_ON    VIDEO_PALETTE_UYVY    /* when decomp=2 */
  99
 100 #define W9968CF_FORCE_RGB        0  /* read RGB instead of BGR, yes=1/no=0 */
 101
 102 #define W9968CF_MAX_WIDTH      800 /* Has effect if up-scaling is on */
 103 #define W9968CF_MAX_HEIGHT     600 /* Has effect if up-scaling is on */
 104 #define W9968CF_WIDTH          320 /* from 128 to 352, multiple of 16 */
 105 #define W9968CF_HEIGHT         240 /* from  96 to 288, multiple of 16 */
 106
 107 #define W9968CF_CLAMPING       0 /* 0 disable, 1 enable video data clamping */
 108 #define W9968CF_FILTER_TYPE    0 /* 0 disable  1 (1-2-1), 2 (2-3-6-3-2) */
 109 #define W9968CF_DOUBLE_BUFFER  1 /* 0 disable, 1 enable double buffer */
 110 #define W9968CF_LARGEVIEW      1 /* 0 disable, 1 enable */
 111 #define W9968CF_UPSCALING      0 /* 0 disable, 1 enable */
 112
 113 #define W9968CF_MONOCHROME     0 /* 0 not monochrome, 1 monochrome sensor */
 114 #define W9968CF_BRIGHTNESS     31000 /* from 0 to 65535 */
 115 #define W9968CF_HUE            32768 /* from 0 to 65535 */
 116 #define W9968CF_COLOUR         32768 /* from 0 to 65535 */
 117 #define W9968CF_CONTRAST       50000 /* from 0 to 65535 */
 118 #define W9968CF_WHITENESS      32768 /* from 0 to 65535 */
 119
 120 #define W9968CF_AUTOBRIGHT     0 /* 0 disable, 1 enable automatic brightness */
 121 #define W9968CF_AUTOEXP        1 /* 0 disable, 1 enable automatic exposure */
 122 #define W9968CF_LIGHTFREQ      50 /* light frequency. 50Hz (Europe) or 60Hz */
 123 #define W9968CF_BANDINGFILTER  0 /* 0 disable, 1 enable banding filter */
 124 #define W9968CF_BACKLIGHT      0 /* 0 or 1, 1=object is lit from behind */
 125 #define W9968CF_MIRROR         0 /* 0 or 1 [don't] reverse image horizontally*/
 126
 127 #define W9968CF_CLOCKDIV         -1 /* -1 = automatic clock divisor */
 128 #define W9968CF_DEF_CLOCKDIVISOR  0 /* default sensor clock divisor value */
 129
 130
 131 /****************************************************************************
 132  * Globals                                                                  *
 133  ****************************************************************************/
 134
 135 #define W9968CF_MODULE_NAME     "V4L driver for W996[87]CF JPEG USB " \
 136                                 "Dual Mode Camera Chip"
 137 #define W9968CF_MODULE_VERSION  "1:1.34-basic"
 138 #define W9968CF_MODULE_AUTHOR   "(C) 2002-2004 Luca Risolia"
 139 #define W9968CF_AUTHOR_EMAIL    "<luca.risolia@studio.unibo.it>"
 140 #define W9968CF_MODULE_LICENSE  "GPL"
 141
 142 static const struct usb_device_id winbond_id_table[] = {
 143         {
 144                 /* Creative Labs Video Blaster WebCam Go Plus */
 145                 USB_DEVICE(0x041e, 0x4003),
 146                 .driver_info = (unsigned long)"w9968cf",
 147         },
 148         {
 149                 /* Generic W996[87]CF JPEG USB Dual Mode Camera */
 150                 USB_DEVICE(0x1046, 0x9967),
 151                 .driver_info = (unsigned long)"w9968cf",
 152         },
 153         { } /* terminating entry */
 154 };
 155
 156 /* W996[87]CF camera models, internal ids: */
 157 enum w9968cf_model_id {
 158         W9968CF_MOD_GENERIC = 1, /* Generic W996[87]CF based device */
 159         W9968CF_MOD_CLVBWGP = 11,/*Creative Labs Video Blaster WebCam Go Plus*/
 160         W9968CF_MOD_ADPVDMA = 21, /* Aroma Digi Pen VGA Dual Mode ADG-5000 */
 161         W9986CF_MOD_AAU = 31,     /* AVerMedia AVerTV USB */
 162         W9968CF_MOD_CLVBWG = 34,  /* Creative Labs Video Blaster WebCam Go */
 163         W9968CF_MOD_LL = 37,      /* Lebon LDC-035A */
 164         W9968CF_MOD_EEEMC = 40,   /* Ezonics EZ-802 EZMega Cam */
 165         W9968CF_MOD_OOE = 42,     /* OmniVision OV8610-EDE */
 166         W9968CF_MOD_ODPVDMPC = 43,/* OPCOM Digi Pen VGA Dual Mode Pen Camera */
 167         W9968CF_MOD_PDPII = 46,   /* Pretec Digi Pen-II */
 168         W9968CF_MOD_PDP480 = 49,  /* Pretec DigiPen-480 */
 169 };
 170
 171 enum w9968cf_frame_status {
 172         F_READY,            /* finished grabbing & ready to be read/synced */
 173         F_GRABBING,         /* in the process of being grabbed into */
 174         F_ERROR,            /* something bad happened while processing */
 175         F_UNUSED            /* unused (no VIDIOCMCAPTURE) */
 176 };
 177
 178 struct w9968cf_frame_t {
 179         void* buffer;
 180         unsigned long size;
 181         u32 length;
 182         int number;
 183         enum w9968cf_frame_status status;
 184         struct w9968cf_frame_t* next;
 185         u8 queued;
 186 };
 187
 188 enum w9968cf_vpp_flag {
 189         VPP_NONE = 0x00,
 190         VPP_UPSCALE = 0x01,
 191         VPP_SWAP_YUV_BYTES = 0x02,
 192         VPP_DECOMPRESSION = 0x04,
 193         VPP_UYVY_TO_RGBX = 0x08,
 194 };
 195
 196 /* Main device driver structure */
 197 struct w9968cf_device {
 198         enum w9968cf_model_id id;   /* private device identifier */
 199
 200         struct v4l2_device v4l2_dev;
 201         struct video_device* v4ldev; /* -> V4L structure */
 202         struct list_head v4llist;    /* entry of the list of V4L cameras */
 203
 204         struct usb_device* usbdev;           /* -> main USB structure */
 205         struct urb* urb[W9968CF_URBS];       /* -> USB request block structs */
 206         void* transfer_buffer[W9968CF_URBS]; /* -> ISO transfer buffers */
 207         u16* control_buffer;                 /* -> buffer for control req.*/
 208         u16* data_buffer;                    /* -> data to send to the FSB */
 209
 210         struct w9968cf_frame_t frame[W9968CF_MAX_BUFFERS];
 211         struct w9968cf_frame_t frame_tmp; /* temporary frame */
 212         struct w9968cf_frame_t frame_vpp; /* helper frame.*/
 213         struct w9968cf_frame_t* frame_current; /* -> frame being grabbed */
 214         struct w9968cf_frame_t* requested_frame[W9968CF_MAX_BUFFERS];
 215
 216         u8 max_buffers,   /* number of requested buffers */
 217            force_palette, /* yes=1/no=0 */
 218            force_rgb,     /* read RGB instead of BGR, yes=1, no=0 */
 219            double_buffer, /* hardware double buffering yes=1/no=0 */
 220            clamping,      /* video data clamping yes=1/no=0 */
 221            filter_type,   /* 0=disabled, 1=3 tap, 2=5 tap filter */
 222            capture,       /* 0=disabled, 1=enabled */
 223            largeview,     /* 0=disabled, 1=enabled */
 224            decompression, /* 0=disabled, 1=forced, 2=allowed */
 225            upscaling;     /* software image scaling, 0=enabled, 1=disabled */
 226
 227         struct video_picture picture; /* current picture settings */
 228         struct video_window window;   /* current window settings */
 229
 230         u16 hw_depth,    /* depth (used by the chip) */
 231             hw_palette,  /* palette (used by the chip) */
 232             hw_width,    /* width (used by the chip) */
 233             hw_height,   /* height (used by the chip) */
 234             hs_polarity, /* 0=negative sync pulse, 1=positive sync pulse */
 235             vs_polarity, /* 0=negative sync pulse, 1=positive sync pulse */
 236             start_cropx, /* pixels from HS inactive edge to 1st cropped pixel*/
 237             start_cropy; /* pixels from VS inactive edge to 1st cropped pixel*/
 238
 239         enum w9968cf_vpp_flag vpp_flag; /* post-processing routines in use */
 240
 241         u8 nbuffers,      /* number of allocated frame buffers */
 242            altsetting,    /* camera alternate setting */
 243            disconnected,  /* flag: yes=1, no=0 */
 244            misconfigured, /* flag: yes=1, no=0 */
 245            users,         /* flag: number of users holding the device */
 246            streaming;     /* flag: yes=1, no=0 */
 247
 248         u8 sensor_initialized; /* flag: yes=1, no=0 */
 249
 250         /* Determined by the image sensor type: */
 251         int sensor,       /* type of image sensor chip (CC_*) */
 252             monochrome;   /* image sensor is (probably) monochrome */
 253         u16 maxwidth,     /* maximum width supported by the image sensor */
 254             maxheight,    /* maximum height supported by the image sensor */
 255             minwidth,     /* minimum width supported by the image sensor */
 256             minheight;    /* minimum height supported by the image sensor */
 257         u8  auto_brt,     /* auto brightness enabled flag */
 258             auto_exp,     /* auto exposure enabled flag */
 259             backlight,    /* backlight exposure algorithm flag */
 260             mirror,       /* image is reversed horizontally */
 261             lightfreq,    /* power (lighting) frequency */
 262             bandfilt;     /* banding filter enabled flag */
 263         s8  clockdiv;     /* clock divisor */
 264
 265         /* I2C interface to kernel */
 266         struct i2c_adapter i2c_adapter;
 267         struct v4l2_subdev *sensor_sd;
 268
 269         /* Locks */
 270         struct mutex dev_mutex,    /* for probe, disconnect,open and close */
 271                          fileop_mutex; /* for read and ioctl */
 272         spinlock_t urb_lock,   /* for submit_urb() and unlink_urb() */
 273                    flist_lock; /* for requested frame list accesses */
 274         wait_queue_head_t open, wait_queue;
 275
 276         char command[16]; /* name of the program holding the device */
 277 };
 278
 279 static inline struct w9968cf_device *to_cam(struct v4l2_device *v4l2_dev)
 280 {
 281         return container_of(v4l2_dev, struct w9968cf_device, v4l2_dev);
 282 }
 283
 284
 285 /****************************************************************************
 286  * Macros for debugging                                                     *
 287  ****************************************************************************/
 288
 289 #undef DBG
 290 #undef KDBG
 291 #ifdef W9968CF_DEBUG
 292 /* For device specific debugging messages */
 293 #       define DBG(level, fmt, args...)                                       \
 294 {                                                                             \
 295         if ( ((specific_debug) && (debug == (level))) ||                      \
 296              ((!specific_debug) && (debug >= (level))) ) {                    \
 297                 if ((level) == 1)                                             \
 298                         v4l2_err(&cam->v4l2_dev, fmt "\n", ## args);          \
 299                 else if ((level) == 2 || (level) == 3)                        \
 300                         v4l2_info(&cam->v4l2_dev, fmt "\n", ## args);         \
 301                 else if ((level) == 4)                                        \
 302                         v4l2_warn(&cam->v4l2_dev, fmt "\n", ## args);         \
 303                 else if ((level) >= 5)                                        \
 304                         v4l2_info(&cam->v4l2_dev, "[%s:%d] " fmt "\n",        \
 305                                  __func__, __LINE__ , ## args);               \
 306         }                                                                     \
 307 }
 308 /* For generic kernel (not device specific) messages */
 309 #       define KDBG(level, fmt, args...)                                      \
 310 {                                                                             \
 311         if ( ((specific_debug) && (debug == (level))) ||                      \
 312              ((!specific_debug) && (debug >= (level))) ) {                    \
 313                 if ((level) >= 1 && (level) <= 4)                             \
 314                         pr_info("w9968cf: " fmt "\n", ## args);               \
 315                 else if ((level) >= 5)                                        \
 316                         pr_debug("w9968cf: [%s:%d] " fmt "\n", __func__,  \
 317                                  __LINE__ , ## args);                         \
 318         }                                                                     \
 319 }
 320 #else
 321         /* Not debugging: nothing */
 322 #       define DBG(level, fmt, args...) do {;} while(0);
 323 #       define KDBG(level, fmt, args...) do {;} while(0);
 324 #endif
 325
 326 #undef PDBG
 327 #define PDBG(fmt, args...)                                                    \
 328 v4l2_info(&cam->v4l2_dev, "[%s:%d] " fmt "\n", __func__, __LINE__ , ## args);
 329
 330 #undef PDBGG
 331 #define PDBGG(fmt, args...) do {;} while(0); /* nothing: it's a placeholder */
 332
 333 #endif /* _W9968CF_H_ */