drivers/media/video/pwc/pwc.h

   1 /* (C) 1999-2003 Nemosoft Unv.
   2    (C) 2004-2006 Luc Saillard (luc@saillard.org)
   3
   4    NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
   5    driver and thus may have bugs that are not present in the original version.
   6    Please send bug reports and support requests to <luc@saillard.org>.
   7    The decompression routines have been implemented by reverse-engineering the
   8    Nemosoft binary pwcx module. Caveat emptor.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23 */
  24
  25 #ifndef PWC_H
  26 #define PWC_H
  27
  28 #include <linux/module.h>
  29 #include <linux/usb.h>
  30 #include <linux/spinlock.h>
  31 #include <linux/wait.h>
  32 #include <linux/version.h>
  33 #include <linux/mutex.h>
  34 #include <linux/mm.h>
  35 #include <asm/errno.h>
  36 #include <linux/videodev.h>
  37 #include <media/v4l2-common.h>
  38 #include <media/v4l2-ioctl.h>
  39 #ifdef CONFIG_USB_PWC_INPUT_EVDEV
  40 #include <linux/input.h>
  41 #endif
  42
  43 #include "pwc-uncompress.h"
  44 #include <media/pwc-ioctl.h>
  45
  46 /* Version block */
  47 #define PWC_MAJOR       10
  48 #define PWC_MINOR       0
  49 #define PWC_EXTRAMINOR  12
  50 #define PWC_VERSION_CODE KERNEL_VERSION(PWC_MAJOR,PWC_MINOR,PWC_EXTRAMINOR)
  51 #define PWC_VERSION     "10.0.13"
  52 #define PWC_NAME        "pwc"
  53 #define PFX             PWC_NAME ": "
  54
  55
  56 /* Trace certain actions in the driver */
  57 #define PWC_DEBUG_LEVEL_MODULE  (1<<0)
  58 #define PWC_DEBUG_LEVEL_PROBE   (1<<1)
  59 #define PWC_DEBUG_LEVEL_OPEN    (1<<2)
  60 #define PWC_DEBUG_LEVEL_READ    (1<<3)
  61 #define PWC_DEBUG_LEVEL_MEMORY  (1<<4)
  62 #define PWC_DEBUG_LEVEL_FLOW    (1<<5)
  63 #define PWC_DEBUG_LEVEL_SIZE    (1<<6)
  64 #define PWC_DEBUG_LEVEL_IOCTL   (1<<7)
  65 #define PWC_DEBUG_LEVEL_TRACE   (1<<8)
  66
  67 #define PWC_DEBUG_MODULE(fmt, args...) PWC_DEBUG(MODULE, fmt, ##args)
  68 #define PWC_DEBUG_PROBE(fmt, args...) PWC_DEBUG(PROBE, fmt, ##args)
  69 #define PWC_DEBUG_OPEN(fmt, args...) PWC_DEBUG(OPEN, fmt, ##args)
  70 #define PWC_DEBUG_READ(fmt, args...) PWC_DEBUG(READ, fmt, ##args)
  71 #define PWC_DEBUG_MEMORY(fmt, args...) PWC_DEBUG(MEMORY, fmt, ##args)
  72 #define PWC_DEBUG_FLOW(fmt, args...) PWC_DEBUG(FLOW, fmt, ##args)
  73 #define PWC_DEBUG_SIZE(fmt, args...) PWC_DEBUG(SIZE, fmt, ##args)
  74 #define PWC_DEBUG_IOCTL(fmt, args...) PWC_DEBUG(IOCTL, fmt, ##args)
  75 #define PWC_DEBUG_TRACE(fmt, args...) PWC_DEBUG(TRACE, fmt, ##args)
  76
  77
  78 #ifdef CONFIG_USB_PWC_DEBUG
  79
  80 #define PWC_DEBUG_LEVEL (PWC_DEBUG_LEVEL_MODULE)
  81
  82 #define PWC_DEBUG(level, fmt, args...) do {\
  83           if ((PWC_DEBUG_LEVEL_ ##level) & pwc_trace) \
  84              printk(KERN_DEBUG PFX fmt, ##args); \
  85           } while(0)
  86
  87 #define PWC_ERROR(fmt, args...) printk(KERN_ERR PFX fmt, ##args)
  88 #define PWC_WARNING(fmt, args...) printk(KERN_WARNING PFX fmt, ##args)
  89 #define PWC_INFO(fmt, args...) printk(KERN_INFO PFX fmt, ##args)
  90 #define PWC_TRACE(fmt, args...) PWC_DEBUG(TRACE, fmt, ##args)
  91
  92 #else /* if ! CONFIG_USB_PWC_DEBUG */
  93
  94 #define PWC_ERROR(fmt, args...) printk(KERN_ERR PFX fmt, ##args)
  95 #define PWC_WARNING(fmt, args...) printk(KERN_WARNING PFX fmt, ##args)
  96 #define PWC_INFO(fmt, args...) printk(KERN_INFO PFX fmt, ##args)
  97 #define PWC_TRACE(fmt, args...) do { } while(0)
  98 #define PWC_DEBUG(level, fmt, args...) do { } while(0)
  99
 100 #define pwc_trace 0
 101
 102 #endif
 103
 104 /* Defines for ToUCam cameras */
 105 #define TOUCAM_HEADER_SIZE              8
 106 #define TOUCAM_TRAILER_SIZE             4
 107
 108 #define FEATURE_MOTOR_PANTILT           0x0001
 109 #define FEATURE_CODEC1                  0x0002
 110 #define FEATURE_CODEC2                  0x0004
 111
 112 /* Turn certain features on/off */
 113 #define PWC_INT_PIPE 0
 114
 115 /* Ignore errors in the first N frames, to allow for startup delays */
 116 #define FRAME_LOWMARK 5
 117
 118 /* Size and number of buffers for the ISO pipe. */
 119 #define MAX_ISO_BUFS            2
 120 #define ISO_FRAMES_PER_DESC     10
 121 #define ISO_MAX_FRAME_SIZE      960
 122 #define ISO_BUFFER_SIZE         (ISO_FRAMES_PER_DESC * ISO_MAX_FRAME_SIZE)
 123
 124 /* Frame buffers: contains compressed or uncompressed video data. */
 125 #define MAX_FRAMES              5
 126 /* Maximum size after decompression is 640x480 YUV data, 1.5 * 640 * 480 */
 127 #define PWC_FRAME_SIZE          (460800 + TOUCAM_HEADER_SIZE + TOUCAM_TRAILER_SIZE)
 128
 129 /* Absolute maximum number of buffers available for mmap() */
 130 #define MAX_IMAGES              10
 131
 132 /* Some macros to quickly find the type of a webcam */
 133 #define DEVICE_USE_CODEC1(x) ((x)<675)
 134 #define DEVICE_USE_CODEC2(x) ((x)>=675 && (x)<700)
 135 #define DEVICE_USE_CODEC3(x) ((x)>=700)
 136 #define DEVICE_USE_CODEC23(x) ((x)>=675)
 137
 138 /* The following structures were based on cpia.h. Why reinvent the wheel? :-) */
 139 struct pwc_iso_buf
 140 {
 141         void *data;
 142         int  length;
 143         int  read;
 144         struct urb *urb;
 145 };
 146
 147 /* intermediate buffers with raw data from the USB cam */
 148 struct pwc_frame_buf
 149 {
 150    void *data;
 151    volatile int filled;         /* number of bytes filled */
 152    struct pwc_frame_buf *next;  /* list */
 153 };
 154
 155 /* additionnal informations used when dealing image between kernel and userland */
 156 struct pwc_imgbuf
 157 {
 158         unsigned long offset;   /* offset of this buffer in the big array of image_data */
 159         int   vma_use_count;    /* count the number of time this memory is mapped */
 160 };
 161
 162 struct pwc_device
 163 {
 164    struct video_device *vdev;
 165
 166    /* Pointer to our usb_device */
 167    struct usb_device *udev;
 168
 169    int type;                    /* type of cam (645, 646, 675, 680, 690, 720, 730, 740, 750) */
 170    int release;                 /* release number */
 171    int features;                /* feature bits */
 172    char serial[30];             /* serial number (string) */
 173    int error_status;            /* set when something goes wrong with the cam (unplugged, USB errors) */
 174    int usb_init;                /* set when the cam has been initialized over USB */
 175
 176    /*** Video data ***/
 177    int vopen;                   /* flag */
 178    int vendpoint;               /* video isoc endpoint */
 179    int vcinterface;             /* video control interface */
 180    int valternate;              /* alternate interface needed */
 181    int vframes, vsize;          /* frames-per-second & size (see PSZ_*) */
 182    int vpalette;                /* palette: 420P, RAW or RGBBAYER */
 183    int vframe_count;            /* received frames */
 184    int vframes_dumped;          /* counter for dumped frames */
 185    int vframes_error;           /* frames received in error */
 186    int vmax_packet_size;        /* USB maxpacket size */
 187    int vlast_packet_size;       /* for frame synchronisation */
 188    int visoc_errors;            /* number of contiguous ISOC errors */
 189    int vcompression;            /* desired compression factor */
 190    int vbandlength;             /* compressed band length; 0 is uncompressed */
 191    char vsnapshot;              /* snapshot mode */
 192    char vsync;                  /* used by isoc handler */
 193    char vmirror;                /* for ToUCaM series */
 194         char unplugged;
 195
 196    int cmd_len;
 197    unsigned char cmd_buf[13];
 198
 199    /* The image acquisition requires 3 to 4 steps:
 200       1. data is gathered in short packets from the USB controller
 201       2. data is synchronized and packed into a frame buffer
 202       3a. in case data is compressed, decompress it directly into image buffer
 203       3b. in case data is uncompressed, copy into image buffer with viewport
 204       4. data is transferred to the user process
 205
 206       Note that MAX_ISO_BUFS != MAX_FRAMES != MAX_IMAGES....
 207       We have in effect a back-to-back-double-buffer system.
 208     */
 209    /* 1: isoc */
 210    struct pwc_iso_buf sbuf[MAX_ISO_BUFS];
 211    char iso_init;
 212
 213    /* 2: frame */
 214    struct pwc_frame_buf *fbuf;  /* all frames */
 215    struct pwc_frame_buf *empty_frames, *empty_frames_tail;      /* all empty frames */
 216    struct pwc_frame_buf *full_frames, *full_frames_tail;        /* all filled frames */
 217    struct pwc_frame_buf *fill_frame;    /* frame currently being filled */
 218    struct pwc_frame_buf *read_frame;    /* frame currently read by user process */
 219    int frame_header_size, frame_trailer_size;
 220    int frame_size;
 221    int frame_total_size; /* including header & trailer */
 222    int drop_frames;
 223
 224    /* 3: decompression */
 225    void *decompress_data;               /* private data for decompression engine */
 226
 227    /* 4: image */
 228    /* We have an 'image' and a 'view', where 'image' is the fixed-size image
 229       as delivered by the camera, and 'view' is the size requested by the
 230       program. The camera image is centered in this viewport, laced with
 231       a gray or black border. view_min <= image <= view <= view_max;
 232     */
 233    int image_mask;                      /* bitmask of supported sizes */
 234    struct pwc_coord view_min, view_max; /* minimum and maximum viewable sizes */
 235    struct pwc_coord abs_max;            /* maximum supported size with compression */
 236    struct pwc_coord image, view;        /* image and viewport size */
 237    struct pwc_coord offset;             /* offset within the viewport */
 238
 239    void *image_data;                    /* total buffer, which is subdivided into ... */
 240    struct pwc_imgbuf images[MAX_IMAGES];/* ...several images... */
 241    int fill_image;                      /* ...which are rotated. */
 242    int len_per_image;                   /* length per image */
 243    int image_read_pos;                  /* In case we read data in pieces, keep track of were we are in the imagebuffer */
 244    int image_used[MAX_IMAGES];          /* For MCAPTURE and SYNC */
 245
 246    struct mutex modlock;                /* to prevent races in video_open(), etc */
 247    spinlock_t ptrlock;                  /* for manipulating the buffer pointers */
 248
 249    /*** motorized pan/tilt feature */
 250    struct pwc_mpt_range angle_range;
 251    int pan_angle;                       /* in degrees * 100 */
 252    int tilt_angle;                      /* absolute angle; 0,0 is home position */
 253    int snapshot_button_status;          /* set to 1 when the user push the button, reset to 0 when this value is read */
 254 #ifdef CONFIG_USB_PWC_INPUT_EVDEV
 255    struct input_dev *button_dev;        /* webcam snapshot button input */
 256    char button_phys[64];
 257 #endif
 258
 259    /*** Misc. data ***/
 260    wait_queue_head_t frameq;            /* When waiting for a frame to finish... */
 261 #if PWC_INT_PIPE
 262    void *usb_int_handler;               /* for the interrupt endpoint */
 263 #endif
 264 };
 265
 266 #ifdef __cplusplus
 267 extern "C" {
 268 #endif
 269
 270 /* Global variables */
 271 #ifdef CONFIG_USB_PWC_DEBUG
 272 extern int pwc_trace;
 273 #endif
 274 extern int pwc_mbufs;
 275
 276 /** functions in pwc-if.c */
 277 int pwc_try_video_mode(struct pwc_device *pdev, int width, int height, int new_fps, int new_compression, int new_snapshot);
 278 int pwc_handle_frame(struct pwc_device *pdev);
 279 void pwc_next_image(struct pwc_device *pdev);
 280 int pwc_isoc_init(struct pwc_device *pdev);
 281 void pwc_isoc_cleanup(struct pwc_device *pdev);
 282
 283 /** Functions in pwc-misc.c */
 284 /* sizes in pixels */
 285 extern const struct pwc_coord pwc_image_sizes[PSZ_MAX];
 286
 287 int pwc_decode_size(struct pwc_device *pdev, int width, int height);
 288 void pwc_construct(struct pwc_device *pdev);
 289
 290 /** Functions in pwc-ctrl.c */
 291 /* Request a certain video mode. Returns < 0 if not possible */
 292 extern int pwc_set_video_mode(struct pwc_device *pdev, int width, int height, int frames, int compression, int snapshot);
 293 extern unsigned int pwc_get_fps(struct pwc_device *pdev, unsigned int index, unsigned int size);
 294 /* Calculate the number of bytes per image (not frame) */
 295 extern int pwc_mpt_reset(struct pwc_device *pdev, int flags);
 296 extern int pwc_mpt_set_angle(struct pwc_device *pdev, int pan, int tilt);
 297
 298 /* Various controls; should be obvious. Value 0..65535, or < 0 on error */
 299 extern int pwc_get_brightness(struct pwc_device *pdev);
 300 extern int pwc_set_brightness(struct pwc_device *pdev, int value);
 301 extern int pwc_get_contrast(struct pwc_device *pdev);
 302 extern int pwc_set_contrast(struct pwc_device *pdev, int value);
 303 extern int pwc_get_gamma(struct pwc_device *pdev);
 304 extern int pwc_set_gamma(struct pwc_device *pdev, int value);
 305 extern int pwc_get_saturation(struct pwc_device *pdev, int *value);
 306 extern int pwc_set_saturation(struct pwc_device *pdev, int value);
 307 extern int pwc_set_leds(struct pwc_device *pdev, int on_value, int off_value);
 308 extern int pwc_get_cmos_sensor(struct pwc_device *pdev, int *sensor);
 309 extern int pwc_restore_user(struct pwc_device *pdev);
 310 extern int pwc_save_user(struct pwc_device *pdev);
 311 extern int pwc_restore_factory(struct pwc_device *pdev);
 312
 313 /* exported for use by v4l2 controls */
 314 extern int pwc_get_red_gain(struct pwc_device *pdev, int *value);
 315 extern int pwc_set_red_gain(struct pwc_device *pdev, int value);
 316 extern int pwc_get_blue_gain(struct pwc_device *pdev, int *value);
 317 extern int pwc_set_blue_gain(struct pwc_device *pdev, int value);
 318 extern int pwc_get_awb(struct pwc_device *pdev);
 319 extern int pwc_set_awb(struct pwc_device *pdev, int mode);
 320 extern int pwc_set_agc(struct pwc_device *pdev, int mode, int value);
 321 extern int pwc_get_agc(struct pwc_device *pdev, int *value);
 322 extern int pwc_set_shutter_speed(struct pwc_device *pdev, int mode, int value);
 323 extern int pwc_get_shutter_speed(struct pwc_device *pdev, int *value);
 324
 325 extern int pwc_set_colour_mode(struct pwc_device *pdev, int colour);
 326 extern int pwc_get_colour_mode(struct pwc_device *pdev, int *colour);
 327 extern int pwc_set_contour(struct pwc_device *pdev, int contour);
 328 extern int pwc_get_contour(struct pwc_device *pdev, int *contour);
 329 extern int pwc_set_backlight(struct pwc_device *pdev, int backlight);
 330 extern int pwc_get_backlight(struct pwc_device *pdev, int *backlight);
 331 extern int pwc_set_flicker(struct pwc_device *pdev, int flicker);
 332 extern int pwc_get_flicker(struct pwc_device *pdev, int *flicker);
 333 extern int pwc_set_dynamic_noise(struct pwc_device *pdev, int noise);
 334 extern int pwc_get_dynamic_noise(struct pwc_device *pdev, int *noise);
 335
 336 /* Power down or up the camera; not supported by all models */
 337 extern int pwc_camera_power(struct pwc_device *pdev, int power);
 338
 339 /* Private ioctl()s; see pwc-ioctl.h */
 340 extern long pwc_ioctl(struct pwc_device *pdev, unsigned int cmd, void *arg);
 341
 342 /** Functions in pwc-v4l.c */
 343 extern long pwc_video_do_ioctl(struct file *file, unsigned int cmd, void *arg);
 344
 345 /** pwc-uncompress.c */
 346 /* Expand frame to image, possibly including decompression. Uses read_frame and fill_image */
 347 extern int pwc_decompress(struct pwc_device *pdev);
 348
 349 #ifdef __cplusplus
 350 }
 351 #endif
 352
 353
 354 #endif
 355 /* vim: set cino= formatoptions=croql cindent shiftwidth=8 tabstop=8: */