drivers/usb/media/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/videodev.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/config.h>
  32 #include <linux/param.h>
  33 #include <linux/types.h>
  34 #include <linux/rwsem.h>
  35 #include <asm/semaphore.h>
  36
  37 #include <media/ovcamchip.h>
  38
  39 #include "w9968cf_vpp.h"
  40
  41
  42 /****************************************************************************
  43  * Default values                                                           *
  44  ****************************************************************************/
  45
  46 #define W9968CF_OVMOD_LOAD      1  /* automatic 'ovcamchip' module loading */
  47 #define W9968CF_VPPMOD_LOAD     1  /* automatic 'w9968cf-vpp' module loading */
  48
  49 /* Comment/uncomment the following line to enable/disable debugging messages */
  50 #define W9968CF_DEBUG
  51
  52 /* These have effect only if W9968CF_DEBUG is defined */
  53 #define W9968CF_DEBUG_LEVEL    2 /* from 0 to 6. 0 for no debug informations */
  54 #define W9968CF_SPECIFIC_DEBUG 0 /* 0 or 1 */
  55
  56 #define W9968CF_MAX_DEVICES    32
  57 #define W9968CF_SIMCAMS        W9968CF_MAX_DEVICES /* simultaneous cameras */
  58
  59 #define W9968CF_MAX_BUFFERS   32
  60 #define W9968CF_BUFFERS       2 /* n. of frame buffers from 2 to MAX_BUFFERS */
  61
  62 /* Maximum data payload sizes in bytes for alternate settings */
  63 static const u16 wMaxPacketSize[] = {1023, 959, 895, 831, 767, 703, 639, 575,
  64                                       511, 447, 383, 319, 255, 191, 127,  63};
  65 #define W9968CF_PACKET_SIZE      1023 /* according to wMaxPacketSizes[] */
  66 #define W9968CF_MIN_PACKET_SIZE  63 /* minimum value */
  67 #define W9968CF_ISO_PACKETS      5 /* n.of packets for isochronous transfers */
  68 #define W9968CF_USB_CTRL_TIMEOUT 1000 /* timeout (ms) for usb control commands */
  69 #define W9968CF_URBS             2 /* n. of scheduled URBs for ISO transfer */
  70
  71 #define W9968CF_I2C_BUS_DELAY    4 /* delay in us for I2C bit r/w operations */
  72 #define W9968CF_I2C_RW_RETRIES   15 /* number of max I2C r/w retries */
  73
  74 /* Available video formats */
  75 struct w9968cf_format {
  76         const u16 palette;
  77         const u16 depth;
  78         const u8 compression;
  79 };
  80
  81 static const struct w9968cf_format w9968cf_formatlist[] = {
  82         { VIDEO_PALETTE_UYVY,    16, 0 }, /* original video */
  83         { VIDEO_PALETTE_YUV422P, 16, 1 }, /* with JPEG compression */
  84         { VIDEO_PALETTE_YUV420P, 12, 1 }, /* with JPEG compression */
  85         { VIDEO_PALETTE_YUV420,  12, 1 }, /* same as YUV420P */
  86         { VIDEO_PALETTE_YUYV,    16, 0 }, /* software conversion */
  87         { VIDEO_PALETTE_YUV422,  16, 0 }, /* software conversion */
  88         { VIDEO_PALETTE_GREY,     8, 0 }, /* software conversion */
  89         { VIDEO_PALETTE_RGB555,  16, 0 }, /* software conversion */
  90         { VIDEO_PALETTE_RGB565,  16, 0 }, /* software conversion */
  91         { VIDEO_PALETTE_RGB24,   24, 0 }, /* software conversion */
  92         { VIDEO_PALETTE_RGB32,   32, 0 }, /* software conversion */
  93         { 0,                      0, 0 }  /* 0 is a terminating entry */
  94 };
  95
  96 #define W9968CF_DECOMPRESSION    2 /* decomp:0=disable,1=force,2=any formats */
  97 #define W9968CF_PALETTE_DECOMP_OFF   VIDEO_PALETTE_UYVY    /* when decomp=0 */
  98 #define W9968CF_PALETTE_DECOMP_FORCE VIDEO_PALETTE_YUV420P /* when decomp=1 */
  99 #define W9968CF_PALETTE_DECOMP_ON    VIDEO_PALETTE_UYVY    /* when decomp=2 */
 100
 101 #define W9968CF_FORCE_RGB        0  /* read RGB instead of BGR, yes=1/no=0 */
 102
 103 #define W9968CF_MAX_WIDTH      800 /* Has effect if up-scaling is on */
 104 #define W9968CF_MAX_HEIGHT     600 /* Has effect if up-scaling is on */
 105 #define W9968CF_WIDTH          320 /* from 128 to 352, multiple of 16 */
 106 #define W9968CF_HEIGHT         240 /* from  96 to 288, multiple of 16 */
 107
 108 #define W9968CF_CLAMPING       0 /* 0 disable, 1 enable video data clamping */
 109 #define W9968CF_FILTER_TYPE    0 /* 0 disable  1 (1-2-1), 2 (2-3-6-3-2) */
 110 #define W9968CF_DOUBLE_BUFFER  1 /* 0 disable, 1 enable double buffer */
 111 #define W9968CF_LARGEVIEW      1 /* 0 disable, 1 enable */
 112 #define W9968CF_UPSCALING      0 /* 0 disable, 1 enable */
 113
 114 #define W9968CF_MONOCHROME     0 /* 0 not monochrome, 1 monochrome sensor */
 115 #define W9968CF_BRIGHTNESS     31000 /* from 0 to 65535 */
 116 #define W9968CF_HUE            32768 /* from 0 to 65535 */
 117 #define W9968CF_COLOUR         32768 /* from 0 to 65535 */
 118 #define W9968CF_CONTRAST       50000 /* from 0 to 65535 */
 119 #define W9968CF_WHITENESS      32768 /* from 0 to 65535 */
 120
 121 #define W9968CF_AUTOBRIGHT     0 /* 0 disable, 1 enable automatic brightness */
 122 #define W9968CF_AUTOEXP        1 /* 0 disable, 1 enable automatic exposure */
 123 #define W9968CF_LIGHTFREQ      50 /* light frequency. 50Hz (Europe) or 60Hz */
 124 #define W9968CF_BANDINGFILTER  0 /* 0 disable, 1 enable banding filter */
 125 #define W9968CF_BACKLIGHT      0 /* 0 or 1, 1=object is lit from behind */
 126 #define W9968CF_MIRROR         0 /* 0 or 1 [don't] reverse image horizontally*/
 127
 128 #define W9968CF_CLOCKDIV         -1 /* -1 = automatic clock divisor */
 129 #define W9968CF_DEF_CLOCKDIVISOR  0 /* default sensor clock divisor value */
 130
 131
 132 /****************************************************************************
 133  * Globals                                                                  *
 134  ****************************************************************************/
 135
 136 #define W9968CF_MODULE_NAME     "V4L driver for W996[87]CF JPEG USB " \
 137                                 "Dual Mode Camera Chip"
 138 #define W9968CF_MODULE_VERSION  "1:1.33-basic"
 139 #define W9968CF_MODULE_AUTHOR   "(C) 2002-2004 Luca Risolia"
 140 #define W9968CF_AUTHOR_EMAIL    "<luca.risolia@studio.unibo.it>"
 141 #define W9968CF_MODULE_LICENSE  "GPL"
 142
 143 static const struct usb_device_id winbond_id_table[] = {
 144         {
 145                 /* Creative Labs Video Blaster WebCam Go Plus */
 146                 USB_DEVICE(0x041e, 0x4003),
 147                 .driver_info = (unsigned long)"w9968cf",
 148         },
 149         {
 150                 /* Generic W996[87]CF JPEG USB Dual Mode Camera */
 151                 USB_DEVICE(0x1046, 0x9967),
 152                 .driver_info = (unsigned long)"w9968cf",
 153         },
 154         { } /* terminating entry */
 155 };
 156
 157 /* W996[87]CF camera models, internal ids: */
 158 enum w9968cf_model_id {
 159         W9968CF_MOD_GENERIC = 1, /* Generic W996[87]CF based device */
 160         W9968CF_MOD_CLVBWGP = 11,/*Creative Labs Video Blaster WebCam Go Plus*/
 161         W9968CF_MOD_ADPVDMA = 21, /* Aroma Digi Pen VGA Dual Mode ADG-5000 */
 162         W9986CF_MOD_AAU = 31,     /* AVerMedia AVerTV USB */
 163         W9968CF_MOD_CLVBWG = 34,  /* Creative Labs Video Blaster WebCam Go */
 164         W9968CF_MOD_LL = 37,      /* Lebon LDC-035A */
 165         W9968CF_MOD_EEEMC = 40,   /* Ezonics EZ-802 EZMega Cam */
 166         W9968CF_MOD_OOE = 42,     /* OmniVision OV8610-EDE */
 167         W9968CF_MOD_ODPVDMPC = 43,/* OPCOM Digi Pen VGA Dual Mode Pen Camera */
 168         W9968CF_MOD_PDPII = 46,   /* Pretec Digi Pen-II */
 169         W9968CF_MOD_PDP480 = 49,  /* Pretec DigiPen-480 */
 170 };
 171
 172 enum w9968cf_frame_status {
 173         F_READY,            /* finished grabbing & ready to be read/synced */
 174         F_GRABBING,         /* in the process of being grabbed into */
 175         F_ERROR,            /* something bad happened while processing */
 176         F_UNUSED            /* unused (no VIDIOCMCAPTURE) */
 177 };
 178
 179 struct w9968cf_frame_t {
 180         void* buffer;
 181         unsigned long size;
 182         u32 length;
 183         int number;
 184         enum w9968cf_frame_status status;
 185         struct w9968cf_frame_t* next;
 186         u8 queued;
 187 };
 188
 189 enum w9968cf_vpp_flag {
 190         VPP_NONE = 0x00,
 191         VPP_UPSCALE = 0x01,
 192         VPP_SWAP_YUV_BYTES = 0x02,
 193         VPP_DECOMPRESSION = 0x04,
 194         VPP_UYVY_TO_RGBX = 0x08,
 195 };
 196
 197 static struct w9968cf_vpp_t* w9968cf_vpp;
 198 static DECLARE_MUTEX(w9968cf_vppmod_lock);
 199 static DECLARE_WAIT_QUEUE_HEAD(w9968cf_vppmod_wait);
 200
 201 static LIST_HEAD(w9968cf_dev_list); /* head of V4L registered cameras list */
 202 static DECLARE_MUTEX(w9968cf_devlist_sem); /* semaphore for list traversal */
 203
 204 static DECLARE_RWSEM(w9968cf_disconnect); /* prevent races with open() */
 205
 206 /* Main device driver structure */
 207 struct w9968cf_device {
 208         struct device dev; /* device structure */
 209
 210         enum w9968cf_model_id id;   /* private device identifier */
 211
 212         struct video_device* v4ldev; /* -> V4L structure */
 213         struct list_head v4llist;    /* entry of the list of V4L cameras */
 214
 215         struct usb_device* usbdev;           /* -> main USB structure */
 216         struct urb* urb[W9968CF_URBS];       /* -> USB request block structs */
 217         void* transfer_buffer[W9968CF_URBS]; /* -> ISO transfer buffers */
 218         u16* control_buffer;                 /* -> buffer for control req.*/
 219         u16* data_buffer;                    /* -> data to send to the FSB */
 220
 221         struct w9968cf_frame_t frame[W9968CF_MAX_BUFFERS];
 222         struct w9968cf_frame_t frame_tmp; /* temporary frame */
 223         struct w9968cf_frame_t frame_vpp; /* helper frame.*/
 224         struct w9968cf_frame_t* frame_current; /* -> frame being grabbed */
 225         struct w9968cf_frame_t* requested_frame[W9968CF_MAX_BUFFERS];
 226
 227         u8 max_buffers,   /* number of requested buffers */
 228            force_palette, /* yes=1/no=0 */
 229            force_rgb,     /* read RGB instead of BGR, yes=1, no=0 */
 230            double_buffer, /* hardware double buffering yes=1/no=0 */
 231            clamping,      /* video data clamping yes=1/no=0 */
 232            filter_type,   /* 0=disabled, 1=3 tap, 2=5 tap filter */
 233            capture,       /* 0=disabled, 1=enabled */
 234            largeview,     /* 0=disabled, 1=enabled */
 235            decompression, /* 0=disabled, 1=forced, 2=allowed */
 236            upscaling;     /* software image scaling, 0=enabled, 1=disabled */
 237
 238         struct video_picture picture; /* current picture settings */
 239         struct video_window window;   /* current window settings */
 240
 241         u16 hw_depth,    /* depth (used by the chip) */
 242             hw_palette,  /* palette (used by the chip) */
 243             hw_width,    /* width (used by the chip) */
 244             hw_height,   /* height (used by the chip) */
 245             hs_polarity, /* 0=negative sync pulse, 1=positive sync pulse */
 246             vs_polarity, /* 0=negative sync pulse, 1=positive sync pulse */
 247             start_cropx, /* pixels from HS inactive edge to 1st cropped pixel*/
 248             start_cropy; /* pixels from VS inactive edge to 1st cropped pixel*/
 249
 250         enum w9968cf_vpp_flag vpp_flag; /* post-processing routines in use */
 251
 252         u8 nbuffers,      /* number of allocated frame buffers */
 253            altsetting,    /* camera alternate setting */
 254            disconnected,  /* flag: yes=1, no=0 */
 255            misconfigured, /* flag: yes=1, no=0 */
 256            users,         /* flag: number of users holding the device */
 257            streaming;     /* flag: yes=1, no=0 */
 258
 259         u8 sensor_initialized; /* flag: yes=1, no=0 */
 260
 261         /* Determined by the image sensor type: */
 262         int sensor,       /* type of image sensor chip (CC_*) */
 263             monochrome;   /* image sensor is (probably) monochrome */
 264         u16 maxwidth,     /* maximum width supported by the image sensor */
 265             maxheight,    /* maximum height supported by the image sensor */
 266             minwidth,     /* minimum width supported by the image sensor */
 267             minheight;    /* minimum height supported by the image sensor */
 268         u8  auto_brt,     /* auto brightness enabled flag */
 269             auto_exp,     /* auto exposure enabled flag */
 270             backlight,    /* backlight exposure algorithm flag */
 271             mirror,       /* image is reversed horizontally */
 272             lightfreq,    /* power (lighting) frequency */
 273             bandfilt;     /* banding filter enabled flag */
 274         s8  clockdiv;     /* clock divisor */
 275
 276         /* I2C interface to kernel */
 277         struct i2c_adapter i2c_adapter;
 278         struct i2c_client* sensor_client;
 279
 280         /* Locks */
 281         struct semaphore dev_sem,    /* for probe, disconnect,open and close */
 282                          fileop_sem; /* for read and ioctl */
 283         spinlock_t urb_lock,   /* for submit_urb() and unlink_urb() */
 284                    flist_lock; /* for requested frame list accesses */
 285         wait_queue_head_t open, wait_queue;
 286
 287         char command[16]; /* name of the program holding the device */
 288 };
 289
 290
 291 /****************************************************************************
 292  * Macros for debugging                                                     *
 293  ****************************************************************************/
 294
 295 #undef DBG
 296 #undef KDBG
 297 #ifdef W9968CF_DEBUG
 298 /* For device specific debugging messages */
 299 #       define DBG(level, fmt, args...)                                       \
 300 {                                                                             \
 301         if ( ((specific_debug) && (debug == (level))) ||                      \
 302              ((!specific_debug) && (debug >= (level))) ) {                    \
 303                 if ((level) == 1)                                             \
 304                         dev_err(&cam->dev, fmt "\n", ## args);                \
 305                 else if ((level) == 2 || (level) == 3)                        \
 306                         dev_info(&cam->dev, fmt "\n", ## args);               \
 307                 else if ((level) == 4)                                        \
 308                         dev_warn(&cam->dev, fmt "\n", ## args);               \
 309                 else if ((level) >= 5)                                        \
 310                         dev_info(&cam->dev, "[%s:%d] " fmt "\n",              \
 311                                  __FUNCTION__, __LINE__ , ## args);           \
 312         }                                                                     \
 313 }
 314 /* For generic kernel (not device specific) messages */
 315 #       define KDBG(level, fmt, args...)                                      \
 316 {                                                                             \
 317         if ( ((specific_debug) && (debug == (level))) ||                      \
 318              ((!specific_debug) && (debug >= (level))) ) {                    \
 319                 if ((level) >= 1 && (level) <= 4)                             \
 320                         pr_info("w9968cf: " fmt "\n", ## args);               \
 321                 else if ((level) >= 5)                                        \
 322                         pr_debug("w9968cf: [%s:%d] " fmt "\n", __FUNCTION__,  \
 323                                  __LINE__ , ## args);                         \
 324         }                                                                     \
 325 }
 326 #else
 327         /* Not debugging: nothing */
 328 #       define DBG(level, fmt, args...) do {;} while(0);
 329 #       define KDBG(level, fmt, args...) do {;} while(0);
 330 #endif
 331
 332 #undef PDBG
 333 #define PDBG(fmt, args...)                                                    \
 334 dev_info(&cam->dev, "[%s:%d] " fmt "\n", __FUNCTION__, __LINE__ , ## args);
 335
 336 #undef PDBGG
 337 #define PDBGG(fmt, args...) do {;} while(0); /* nothing: it's a placeholder */
 338
 339 #endif /* _W9968CF_H_ */