drivers/media/usb/usbvision/usbvision-video.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * USB USBVISION Video device driver 0.9.10
   4  *
   5  * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de>
   6  *
   7  * This module is part of usbvision driver project.
   8  *
   9  * Let's call the version 0.... until compression decoding is completely
  10  * implemented.
  11  *
  12  * This driver is written by Jose Ignacio Gijon and Joerg Heckenbach.
  13  * It was based on USB CPiA driver written by Peter Pregler,
  14  * Scott J. Bertin and Johannes Erdfelt
  15  * Ideas are taken from bttv driver by Ralph Metzler, Marcus Metzler &
  16  * Gerd Knorr and zoran 36120/36125 driver by Pauline Middelink
  17  * Updates to driver completed by Dwaine P. Garden
  18  *
  19  * TODO:
  20  *     - use submit_urb for all setup packets
  21  *     - Fix memory settings for nt1004. It is 4 times as big as the
  22  *       nt1003 memory.
  23  *     - Add audio on endpoint 3 for nt1004 chip.
  24  *         Seems impossible, needs a codec interface.  Which one?
  25  *     - Clean up the driver.
  26  *     - optimization for performance.
  27  *     - Add Videotext capability (VBI).  Working on it.....
  28  *     - Check audio for other devices
  29  */
  30
  31 #include <linux/kernel.h>
  32 #include <linux/list.h>
  33 #include <linux/timer.h>
  34 #include <linux/slab.h>
  35 #include <linux/mm.h>
  36 #include <linux/highmem.h>
  37 #include <linux/vmalloc.h>
  38 #include <linux/module.h>
  39 #include <linux/init.h>
  40 #include <linux/spinlock.h>
  41 #include <linux/io.h>
  42 #include <linux/videodev2.h>
  43 #include <linux/i2c.h>
  44
  45 #include <media/i2c/saa7115.h>
  46 #include <media/v4l2-common.h>
  47 #include <media/v4l2-ioctl.h>
  48 #include <media/v4l2-event.h>
  49 #include <media/tuner.h>
  50
  51 #include <linux/workqueue.h>
  52
  53 #include "usbvision.h"
  54 #include "usbvision-cards.h"
  55
  56 #define DRIVER_AUTHOR                                   \
  57         "Joerg Heckenbach <joerg@heckenbach-aw.de>, "   \
  58         "Dwaine Garden <DwaineGarden@rogers.com>"
  59 #define DRIVER_NAME "usbvision"
  60 #define DRIVER_ALIAS "USBVision"
  61 #define DRIVER_DESC "USBVision USB Video Device Driver for Linux"
  62 #define USBVISION_VERSION_STRING "0.9.11"
  63
  64 #define ENABLE_HEXDUMP  0       /* Enable if you need it */
  65
  66
  67 #ifdef USBVISION_DEBUG
  68         #define PDEBUG(level, fmt, args...) { \
  69                 if (video_debug & (level)) \
  70                         printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \
  71                                 __func__, __LINE__ , ## args); \
  72         }
  73 #else
  74         #define PDEBUG(level, fmt, args...) do {} while (0)
  75 #endif
  76
  77 #define DBG_IO          (1 << 1)
  78 #define DBG_PROBE       (1 << 2)
  79 #define DBG_MMAP        (1 << 3)
  80
  81 /* String operations */
  82 #define rmspace(str)    while (*str == ' ') str++;
  83 #define goto2next(str)  while (*str != ' ') str++; while (*str == ' ') str++;
  84
  85
  86 /* sequential number of usbvision device */
  87 static int usbvision_nr;
  88
  89 static struct usbvision_v4l2_format_st usbvision_v4l2_format[] = {
  90         { 1, 1,  8, V4L2_PIX_FMT_GREY    , "GREY" },
  91         { 1, 2, 16, V4L2_PIX_FMT_RGB565  , "RGB565" },
  92         { 1, 3, 24, V4L2_PIX_FMT_RGB24   , "RGB24" },
  93         { 1, 4, 32, V4L2_PIX_FMT_RGB32   , "RGB32" },
  94         { 1, 2, 16, V4L2_PIX_FMT_RGB555  , "RGB555" },
  95         { 1, 2, 16, V4L2_PIX_FMT_YUYV    , "YUV422" },
  96         { 1, 2, 12, V4L2_PIX_FMT_YVU420  , "YUV420P" }, /* 1.5 ! */
  97         { 1, 2, 16, V4L2_PIX_FMT_YUV422P , "YUV422P" }
  98 };
  99
 100 /* Function prototypes */
 101 static void usbvision_release(struct usb_usbvision *usbvision);
 102
 103 /* Default initialization of device driver parameters */
 104 /* Set the default format for ISOC endpoint */
 105 static int isoc_mode = ISOC_MODE_COMPRESS;
 106 /* Set the default Debug Mode of the device driver */
 107 static int video_debug;
 108 /* Sequential Number of Video Device */
 109 static int video_nr = -1;
 110 /* Sequential Number of Radio Device */
 111 static int radio_nr = -1;
 112
 113 /* Grab parameters for the device driver */
 114
 115 /* Showing parameters under SYSFS */
 116 module_param(isoc_mode, int, 0444);
 117 module_param(video_debug, int, 0444);
 118 module_param(video_nr, int, 0444);
 119 module_param(radio_nr, int, 0444);
 120
 121 MODULE_PARM_DESC(isoc_mode, " Set the default format for ISOC endpoint.  Default: 0x60 (Compression On)");
 122 MODULE_PARM_DESC(video_debug, " Set the default Debug Mode of the device driver.  Default: 0 (Off)");
 123 MODULE_PARM_DESC(video_nr, "Set video device number (/dev/videoX).  Default: -1 (autodetect)");
 124 MODULE_PARM_DESC(radio_nr, "Set radio device number (/dev/radioX).  Default: -1 (autodetect)");
 125
 126
 127 /* Misc stuff */
 128 MODULE_AUTHOR(DRIVER_AUTHOR);
 129 MODULE_DESCRIPTION(DRIVER_DESC);
 130 MODULE_LICENSE("GPL");
 131 MODULE_VERSION(USBVISION_VERSION_STRING);
 132 MODULE_ALIAS(DRIVER_ALIAS);
 133
 134
 135 /*****************************************************************************/
 136 /* SYSFS Code - Copied from the stv680.c usb module.                         */
 137 /* Device information is located at /sys/class/video4linux/video0            */
 138 /* Device parameters information is located at /sys/module/usbvision         */
 139 /* Device USB Information is located at                                      */
 140 /*   /sys/bus/usb/drivers/USBVision Video Grabber                            */
 141 /*****************************************************************************/
 142
 143 #define YES_NO(x) ((x) ? "Yes" : "No")
 144
 145 static inline struct usb_usbvision *cd_to_usbvision(struct device *cd)
 146 {
 147         struct video_device *vdev = to_video_device(cd);
 148         return video_get_drvdata(vdev);
 149 }
 150
 151 static ssize_t show_version(struct device *cd,
 152                             struct device_attribute *attr, char *buf)
 153 {
 154         return sprintf(buf, "%s\n", USBVISION_VERSION_STRING);
 155 }
 156 static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);
 157
 158 static ssize_t show_model(struct device *cd,
 159                           struct device_attribute *attr, char *buf)
 160 {
 161         struct video_device *vdev = to_video_device(cd);
 162         struct usb_usbvision *usbvision = video_get_drvdata(vdev);
 163         return sprintf(buf, "%s\n",
 164                        usbvision_device_data[usbvision->dev_model].model_string);
 165 }
 166 static DEVICE_ATTR(model, S_IRUGO, show_model, NULL);
 167
 168 static ssize_t show_hue(struct device *cd,
 169                         struct device_attribute *attr, char *buf)
 170 {
 171         struct video_device *vdev = to_video_device(cd);
 172         struct usb_usbvision *usbvision = video_get_drvdata(vdev);
 173         s32 val = v4l2_ctrl_g_ctrl(v4l2_ctrl_find(&usbvision->hdl,
 174                                                   V4L2_CID_HUE));
 175
 176         return sprintf(buf, "%d\n", val);
 177 }
 178 static DEVICE_ATTR(hue, S_IRUGO, show_hue, NULL);
 179
 180 static ssize_t show_contrast(struct device *cd,
 181                              struct device_attribute *attr, char *buf)
 182 {
 183         struct video_device *vdev = to_video_device(cd);
 184         struct usb_usbvision *usbvision = video_get_drvdata(vdev);
 185         s32 val = v4l2_ctrl_g_ctrl(v4l2_ctrl_find(&usbvision->hdl,
 186                                                   V4L2_CID_CONTRAST));
 187
 188         return sprintf(buf, "%d\n", val);
 189 }
 190 static DEVICE_ATTR(contrast, S_IRUGO, show_contrast, NULL);
 191
 192 static ssize_t show_brightness(struct device *cd,
 193                                struct device_attribute *attr, char *buf)
 194 {
 195         struct video_device *vdev = to_video_device(cd);
 196         struct usb_usbvision *usbvision = video_get_drvdata(vdev);
 197         s32 val = v4l2_ctrl_g_ctrl(v4l2_ctrl_find(&usbvision->hdl,
 198                                                   V4L2_CID_BRIGHTNESS));
 199
 200         return sprintf(buf, "%d\n", val);
 201 }
 202 static DEVICE_ATTR(brightness, S_IRUGO, show_brightness, NULL);
 203
 204 static ssize_t show_saturation(struct device *cd,
 205                                struct device_attribute *attr, char *buf)
 206 {
 207         struct video_device *vdev = to_video_device(cd);
 208         struct usb_usbvision *usbvision = video_get_drvdata(vdev);
 209         s32 val = v4l2_ctrl_g_ctrl(v4l2_ctrl_find(&usbvision->hdl,
 210                                                   V4L2_CID_SATURATION));
 211
 212         return sprintf(buf, "%d\n", val);
 213 }
 214 static DEVICE_ATTR(saturation, S_IRUGO, show_saturation, NULL);
 215
 216 static ssize_t show_streaming(struct device *cd,
 217                               struct device_attribute *attr, char *buf)
 218 {
 219         struct video_device *vdev = to_video_device(cd);
 220         struct usb_usbvision *usbvision = video_get_drvdata(vdev);
 221         return sprintf(buf, "%s\n",
 222                        YES_NO(usbvision->streaming == stream_on ? 1 : 0));
 223 }
 224 static DEVICE_ATTR(streaming, S_IRUGO, show_streaming, NULL);
 225
 226 static ssize_t show_compression(struct device *cd,
 227                                 struct device_attribute *attr, char *buf)
 228 {
 229         struct video_device *vdev = to_video_device(cd);
 230         struct usb_usbvision *usbvision = video_get_drvdata(vdev);
 231         return sprintf(buf, "%s\n",
 232                        YES_NO(usbvision->isoc_mode == ISOC_MODE_COMPRESS));
 233 }
 234 static DEVICE_ATTR(compression, S_IRUGO, show_compression, NULL);
 235
 236 static ssize_t show_device_bridge(struct device *cd,
 237                                   struct device_attribute *attr, char *buf)
 238 {
 239         struct video_device *vdev = to_video_device(cd);
 240         struct usb_usbvision *usbvision = video_get_drvdata(vdev);
 241         return sprintf(buf, "%d\n", usbvision->bridge_type);
 242 }
 243 static DEVICE_ATTR(bridge, S_IRUGO, show_device_bridge, NULL);
 244
 245 static void usbvision_create_sysfs(struct video_device *vdev)
 246 {
 247         int res;
 248
 249         if (!vdev)
 250                 return;
 251         do {
 252                 res = device_create_file(&vdev->dev, &dev_attr_version);
 253                 if (res < 0)
 254                         break;
 255                 res = device_create_file(&vdev->dev, &dev_attr_model);
 256                 if (res < 0)
 257                         break;
 258                 res = device_create_file(&vdev->dev, &dev_attr_hue);
 259                 if (res < 0)
 260                         break;
 261                 res = device_create_file(&vdev->dev, &dev_attr_contrast);
 262                 if (res < 0)
 263                         break;
 264                 res = device_create_file(&vdev->dev, &dev_attr_brightness);
 265                 if (res < 0)
 266                         break;
 267                 res = device_create_file(&vdev->dev, &dev_attr_saturation);
 268                 if (res < 0)
 269                         break;
 270                 res = device_create_file(&vdev->dev, &dev_attr_streaming);
 271                 if (res < 0)
 272                         break;
 273                 res = device_create_file(&vdev->dev, &dev_attr_compression);
 274                 if (res < 0)
 275                         break;
 276                 res = device_create_file(&vdev->dev, &dev_attr_bridge);
 277                 if (res >= 0)
 278                         return;
 279         } while (0);
 280
 281         dev_err(&vdev->dev, "%s error: %d\n", __func__, res);
 282 }
 283
 284 static void usbvision_remove_sysfs(struct video_device *vdev)
 285 {
 286         if (vdev) {
 287                 device_remove_file(&vdev->dev, &dev_attr_version);
 288                 device_remove_file(&vdev->dev, &dev_attr_model);
 289                 device_remove_file(&vdev->dev, &dev_attr_hue);
 290                 device_remove_file(&vdev->dev, &dev_attr_contrast);
 291                 device_remove_file(&vdev->dev, &dev_attr_brightness);
 292                 device_remove_file(&vdev->dev, &dev_attr_saturation);
 293                 device_remove_file(&vdev->dev, &dev_attr_streaming);
 294                 device_remove_file(&vdev->dev, &dev_attr_compression);
 295                 device_remove_file(&vdev->dev, &dev_attr_bridge);
 296         }
 297 }
 298
 299 /*
 300  * usbvision_open()
 301  *
 302  * This is part of Video 4 Linux API. The driver can be opened by one
 303  * client only (checks internal counter 'usbvision->user'). The procedure
 304  * then allocates buffers needed for video processing.
 305  *
 306  */
 307 static int usbvision_v4l2_open(struct file *file)
 308 {
 309         struct usb_usbvision *usbvision = video_drvdata(file);
 310         int err_code = 0;
 311
 312         PDEBUG(DBG_IO, "open");
 313
 314         if (mutex_lock_interruptible(&usbvision->v4l2_lock))
 315                 return -ERESTARTSYS;
 316
 317         if (usbvision->user) {
 318                 err_code = -EBUSY;
 319         } else {
 320                 err_code = v4l2_fh_open(file);
 321                 if (err_code)
 322                         goto unlock;
 323
 324                 /* Allocate memory for the scratch ring buffer */
 325                 err_code = usbvision_scratch_alloc(usbvision);
 326                 if (isoc_mode == ISOC_MODE_COMPRESS) {
 327                         /* Allocate intermediate decompression buffers
 328                            only if needed */
 329                         err_code = usbvision_decompress_alloc(usbvision);
 330                 }
 331                 if (err_code) {
 332                         /* Deallocate all buffers if trouble */
 333                         usbvision_scratch_free(usbvision);
 334                         usbvision_decompress_free(usbvision);
 335                 }
 336         }
 337
 338         /* If so far no errors then we shall start the camera */
 339         if (!err_code) {
 340                 /* Send init sequence only once, it's large! */
 341                 if (!usbvision->initialized) {
 342                         int setup_ok = 0;
 343                         setup_ok = usbvision_setup(usbvision, isoc_mode);
 344                         if (setup_ok)
 345                                 usbvision->initialized = 1;
 346                         else
 347                                 err_code = -EBUSY;
 348                 }
 349
 350                 if (!err_code) {
 351                         usbvision_begin_streaming(usbvision);
 352                         err_code = usbvision_init_isoc(usbvision);
 353                         /* device must be initialized before isoc transfer */
 354                         usbvision_muxsel(usbvision, 0);
 355
 356                         /* prepare queues */
 357                         usbvision_empty_framequeues(usbvision);
 358                         usbvision->user++;
 359                 }
 360         }
 361
 362 unlock:
 363         mutex_unlock(&usbvision->v4l2_lock);
 364
 365         PDEBUG(DBG_IO, "success");
 366         return err_code;
 367 }
 368
 369 /*
 370  * usbvision_v4l2_close()
 371  *
 372  * This is part of Video 4 Linux API. The procedure
 373  * stops streaming and deallocates all buffers that were earlier
 374  * allocated in usbvision_v4l2_open().
 375  *
 376  */
 377 static int usbvision_v4l2_close(struct file *file)
 378 {
 379         struct usb_usbvision *usbvision = video_drvdata(file);
 380
 381         PDEBUG(DBG_IO, "close");
 382
 383         mutex_lock(&usbvision->v4l2_lock);
 384         usbvision_audio_off(usbvision);
 385         usbvision_restart_isoc(usbvision);
 386         usbvision_stop_isoc(usbvision);
 387
 388         usbvision_decompress_free(usbvision);
 389         usbvision_frames_free(usbvision);
 390         usbvision_empty_framequeues(usbvision);
 391         usbvision_scratch_free(usbvision);
 392
 393         usbvision->user--;
 394         mutex_unlock(&usbvision->v4l2_lock);
 395
 396         if (usbvision->remove_pending) {
 397                 printk(KERN_INFO "%s: Final disconnect\n", __func__);
 398                 usbvision_release(usbvision);
 399                 return 0;
 400         }
 401
 402         PDEBUG(DBG_IO, "success");
 403         return v4l2_fh_release(file);
 404 }
 405
 406
 407 /*
 408  * usbvision_ioctl()
 409  *
 410  * This is part of Video 4 Linux API. The procedure handles ioctl() calls.
 411  *
 412  */
 413 #ifdef CONFIG_VIDEO_ADV_DEBUG
 414 static int vidioc_g_register(struct file *file, void *priv,
 415                                 struct v4l2_dbg_register *reg)
 416 {
 417         struct usb_usbvision *usbvision = video_drvdata(file);
 418         int err_code;
 419
 420         /* NT100x has a 8-bit register space */
 421         err_code = usbvision_read_reg(usbvision, reg->reg&0xff);
 422         if (err_code < 0) {
 423                 dev_err(&usbvision->vdev.dev,
 424                         "%s: VIDIOC_DBG_G_REGISTER failed: error %d\n",
 425                                 __func__, err_code);
 426                 return err_code;
 427         }
 428         reg->val = err_code;
 429         reg->size = 1;
 430         return 0;
 431 }
 432
 433 static int vidioc_s_register(struct file *file, void *priv,
 434                                 const struct v4l2_dbg_register *reg)
 435 {
 436         struct usb_usbvision *usbvision = video_drvdata(file);
 437         int err_code;
 438
 439         /* NT100x has a 8-bit register space */
 440         err_code = usbvision_write_reg(usbvision, reg->reg & 0xff, reg->val);
 441         if (err_code < 0) {
 442                 dev_err(&usbvision->vdev.dev,
 443                         "%s: VIDIOC_DBG_S_REGISTER failed: error %d\n",
 444                                 __func__, err_code);
 445                 return err_code;
 446         }
 447         return 0;
 448 }
 449 #endif
 450
 451 static int vidioc_querycap(struct file *file, void  *priv,
 452                                         struct v4l2_capability *vc)
 453 {
 454         struct usb_usbvision *usbvision = video_drvdata(file);
 455
 456         strscpy(vc->driver, "USBVision", sizeof(vc->driver));
 457         strscpy(vc->card,
 458                 usbvision_device_data[usbvision->dev_model].model_string,
 459                 sizeof(vc->card));
 460         usb_make_path(usbvision->dev, vc->bus_info, sizeof(vc->bus_info));
 461         vc->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
 462                            V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS;
 463         if (usbvision_device_data[usbvision->dev_model].radio)
 464                 vc->capabilities |= V4L2_CAP_RADIO;
 465         if (usbvision->have_tuner)
 466                 vc->capabilities |= V4L2_CAP_TUNER;
 467         return 0;
 468 }
 469
 470 static int vidioc_enum_input(struct file *file, void *priv,
 471                                 struct v4l2_input *vi)
 472 {
 473         struct usb_usbvision *usbvision = video_drvdata(file);
 474         int chan;
 475
 476         if (vi->index >= usbvision->video_inputs)
 477                 return -EINVAL;
 478         if (usbvision->have_tuner)
 479                 chan = vi->index;
 480         else
 481                 chan = vi->index + 1; /* skip Television string*/
 482
 483         /* Determine the requested input characteristics
 484            specific for each usbvision card model */
 485         switch (chan) {
 486         case 0:
 487                 if (usbvision_device_data[usbvision->dev_model].video_channels == 4) {
 488                         strscpy(vi->name, "White Video Input", sizeof(vi->name));
 489                 } else {
 490                         strscpy(vi->name, "Television", sizeof(vi->name));
 491                         vi->type = V4L2_INPUT_TYPE_TUNER;
 492                         vi->tuner = chan;
 493                         vi->std = USBVISION_NORMS;
 494                 }
 495                 break;
 496         case 1:
 497                 vi->type = V4L2_INPUT_TYPE_CAMERA;
 498                 if (usbvision_device_data[usbvision->dev_model].video_channels == 4)
 499                         strscpy(vi->name, "Green Video Input", sizeof(vi->name));
 500                 else
 501                         strscpy(vi->name, "Composite Video Input",
 502                                 sizeof(vi->name));
 503                 vi->std = USBVISION_NORMS;
 504                 break;
 505         case 2:
 506                 vi->type = V4L2_INPUT_TYPE_CAMERA;
 507                 if (usbvision_device_data[usbvision->dev_model].video_channels == 4)
 508                         strscpy(vi->name, "Yellow Video Input", sizeof(vi->name));
 509                 else
 510                         strscpy(vi->name, "S-Video Input", sizeof(vi->name));
 511                 vi->std = USBVISION_NORMS;
 512                 break;
 513         case 3:
 514                 vi->type = V4L2_INPUT_TYPE_CAMERA;
 515                 strscpy(vi->name, "Red Video Input", sizeof(vi->name));
 516                 vi->std = USBVISION_NORMS;
 517                 break;
 518         }
 519         return 0;
 520 }
 521
 522 static int vidioc_g_input(struct file *file, void *priv, unsigned int *input)
 523 {
 524         struct usb_usbvision *usbvision = video_drvdata(file);
 525
 526         *input = usbvision->ctl_input;
 527         return 0;
 528 }
 529
 530 static int vidioc_s_input(struct file *file, void *priv, unsigned int input)
 531 {
 532         struct usb_usbvision *usbvision = video_drvdata(file);
 533
 534         if (input >= usbvision->video_inputs)
 535                 return -EINVAL;
 536
 537         usbvision_muxsel(usbvision, input);
 538         usbvision_set_input(usbvision);
 539         usbvision_set_output(usbvision,
 540                              usbvision->curwidth,
 541                              usbvision->curheight);
 542         return 0;
 543 }
 544
 545 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
 546 {
 547         struct usb_usbvision *usbvision = video_drvdata(file);
 548
 549         usbvision->tvnorm_id = id;
 550
 551         call_all(usbvision, video, s_std, usbvision->tvnorm_id);
 552         /* propagate the change to the decoder */
 553         usbvision_muxsel(usbvision, usbvision->ctl_input);
 554
 555         return 0;
 556 }
 557
 558 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id)
 559 {
 560         struct usb_usbvision *usbvision = video_drvdata(file);
 561
 562         *id = usbvision->tvnorm_id;
 563         return 0;
 564 }
 565
 566 static int vidioc_g_tuner(struct file *file, void *priv,
 567                                 struct v4l2_tuner *vt)
 568 {
 569         struct usb_usbvision *usbvision = video_drvdata(file);
 570
 571         if (vt->index)  /* Only tuner 0 */
 572                 return -EINVAL;
 573         if (vt->type == V4L2_TUNER_RADIO)
 574                 strscpy(vt->name, "Radio", sizeof(vt->name));
 575         else
 576                 strscpy(vt->name, "Television", sizeof(vt->name));
 577
 578         /* Let clients fill in the remainder of this struct */
 579         call_all(usbvision, tuner, g_tuner, vt);
 580
 581         return 0;
 582 }
 583
 584 static int vidioc_s_tuner(struct file *file, void *priv,
 585                                 const struct v4l2_tuner *vt)
 586 {
 587         struct usb_usbvision *usbvision = video_drvdata(file);
 588
 589         /* Only one tuner for now */
 590         if (vt->index)
 591                 return -EINVAL;
 592         /* let clients handle this */
 593         call_all(usbvision, tuner, s_tuner, vt);
 594
 595         return 0;
 596 }
 597
 598 static int vidioc_g_frequency(struct file *file, void *priv,
 599                                 struct v4l2_frequency *freq)
 600 {
 601         struct usb_usbvision *usbvision = video_drvdata(file);
 602
 603         /* Only one tuner */
 604         if (freq->tuner)
 605                 return -EINVAL;
 606         if (freq->type == V4L2_TUNER_RADIO)
 607                 freq->frequency = usbvision->radio_freq;
 608         else
 609                 freq->frequency = usbvision->tv_freq;
 610
 611         return 0;
 612 }
 613
 614 static int vidioc_s_frequency(struct file *file, void *priv,
 615                                 const struct v4l2_frequency *freq)
 616 {
 617         struct usb_usbvision *usbvision = video_drvdata(file);
 618         struct v4l2_frequency new_freq = *freq;
 619
 620         /* Only one tuner for now */
 621         if (freq->tuner)
 622                 return -EINVAL;
 623
 624         call_all(usbvision, tuner, s_frequency, freq);
 625         call_all(usbvision, tuner, g_frequency, &new_freq);
 626         if (freq->type == V4L2_TUNER_RADIO)
 627                 usbvision->radio_freq = new_freq.frequency;
 628         else
 629                 usbvision->tv_freq = new_freq.frequency;
 630
 631         return 0;
 632 }
 633
 634 static int vidioc_reqbufs(struct file *file,
 635                            void *priv, struct v4l2_requestbuffers *vr)
 636 {
 637         struct usb_usbvision *usbvision = video_drvdata(file);
 638         int ret;
 639
 640         RESTRICT_TO_RANGE(vr->count, 1, USBVISION_NUMFRAMES);
 641
 642         /* Check input validity:
 643            the user must do a VIDEO CAPTURE and MMAP method. */
 644         if (vr->memory != V4L2_MEMORY_MMAP)
 645                 return -EINVAL;
 646
 647         if (usbvision->streaming == stream_on) {
 648                 ret = usbvision_stream_interrupt(usbvision);
 649                 if (ret)
 650                         return ret;
 651         }
 652
 653         usbvision_frames_free(usbvision);
 654         usbvision_empty_framequeues(usbvision);
 655         vr->count = usbvision_frames_alloc(usbvision, vr->count);
 656
 657         usbvision->cur_frame = NULL;
 658
 659         return 0;
 660 }
 661
 662 static int vidioc_querybuf(struct file *file,
 663                             void *priv, struct v4l2_buffer *vb)
 664 {
 665         struct usb_usbvision *usbvision = video_drvdata(file);
 666         struct usbvision_frame *frame;
 667
 668         /* FIXME : must control
 669            that buffers are mapped (VIDIOC_REQBUFS has been called) */
 670         if (vb->index >= usbvision->num_frames)
 671                 return -EINVAL;
 672         /* Updating the corresponding frame state */
 673         vb->flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 674         frame = &usbvision->frame[vb->index];
 675         if (frame->grabstate >= frame_state_ready)
 676                 vb->flags |= V4L2_BUF_FLAG_QUEUED;
 677         if (frame->grabstate >= frame_state_done)
 678                 vb->flags |= V4L2_BUF_FLAG_DONE;
 679         if (frame->grabstate == frame_state_unused)
 680                 vb->flags |= V4L2_BUF_FLAG_MAPPED;
 681         vb->memory = V4L2_MEMORY_MMAP;
 682
 683         vb->m.offset = vb->index * PAGE_ALIGN(usbvision->max_frame_size);
 684
 685         vb->memory = V4L2_MEMORY_MMAP;
 686         vb->field = V4L2_FIELD_NONE;
 687         vb->length = usbvision->curwidth *
 688                 usbvision->curheight *
 689                 usbvision->palette.bytes_per_pixel;
 690         vb->timestamp = ns_to_timeval(usbvision->frame[vb->index].ts);
 691         vb->sequence = usbvision->frame[vb->index].sequence;
 692         return 0;
 693 }
 694
 695 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *vb)
 696 {
 697         struct usb_usbvision *usbvision = video_drvdata(file);
 698         struct usbvision_frame *frame;
 699         unsigned long lock_flags;
 700
 701         /* FIXME : works only on VIDEO_CAPTURE MODE, MMAP. */
 702         if (vb->index >= usbvision->num_frames)
 703                 return -EINVAL;
 704
 705         frame = &usbvision->frame[vb->index];
 706
 707         if (frame->grabstate != frame_state_unused)
 708                 return -EAGAIN;
 709
 710         /* Mark it as ready and enqueue frame */
 711         frame->grabstate = frame_state_ready;
 712         frame->scanstate = scan_state_scanning;
 713         frame->scanlength = 0;  /* Accumulated in usbvision_parse_data() */
 714
 715         vb->flags &= ~V4L2_BUF_FLAG_DONE;
 716
 717         /* set v4l2_format index */
 718         frame->v4l2_format = usbvision->palette;
 719
 720         spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
 721         list_add_tail(&usbvision->frame[vb->index].frame, &usbvision->inqueue);
 722         spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
 723
 724         return 0;
 725 }
 726
 727 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *vb)
 728 {
 729         struct usb_usbvision *usbvision = video_drvdata(file);
 730         int ret;
 731         struct usbvision_frame *f;
 732         unsigned long lock_flags;
 733
 734         if (list_empty(&(usbvision->outqueue))) {
 735                 if (usbvision->streaming == stream_idle)
 736                         return -EINVAL;
 737                 ret = wait_event_interruptible
 738                         (usbvision->wait_frame,
 739                          !list_empty(&(usbvision->outqueue)));
 740                 if (ret)
 741                         return ret;
 742         }
 743
 744         spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
 745         f = list_entry(usbvision->outqueue.next,
 746                        struct usbvision_frame, frame);
 747         list_del(usbvision->outqueue.next);
 748         spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
 749
 750         f->grabstate = frame_state_unused;
 751
 752         vb->memory = V4L2_MEMORY_MMAP;
 753         vb->flags = V4L2_BUF_FLAG_MAPPED |
 754                 V4L2_BUF_FLAG_QUEUED |
 755                 V4L2_BUF_FLAG_DONE |
 756                 V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 757         vb->index = f->index;
 758         vb->sequence = f->sequence;
 759         vb->timestamp = ns_to_timeval(f->ts);
 760         vb->field = V4L2_FIELD_NONE;
 761         vb->bytesused = f->scanlength;
 762
 763         return 0;
 764 }
 765
 766 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 767 {
 768         struct usb_usbvision *usbvision = video_drvdata(file);
 769
 770         usbvision->streaming = stream_on;
 771         call_all(usbvision, video, s_stream, 1);
 772
 773         return 0;
 774 }
 775
 776 static int vidioc_streamoff(struct file *file,
 777                             void *priv, enum v4l2_buf_type type)
 778 {
 779         struct usb_usbvision *usbvision = video_drvdata(file);
 780
 781         if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 782                 return -EINVAL;
 783
 784         if (usbvision->streaming == stream_on) {
 785                 usbvision_stream_interrupt(usbvision);
 786                 /* Stop all video streamings */
 787                 call_all(usbvision, video, s_stream, 0);
 788         }
 789         usbvision_empty_framequeues(usbvision);
 790
 791         return 0;
 792 }
 793
 794 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
 795                                         struct v4l2_fmtdesc *vfd)
 796 {
 797         if (vfd->index >= USBVISION_SUPPORTED_PALETTES - 1)
 798                 return -EINVAL;
 799         strscpy(vfd->description, usbvision_v4l2_format[vfd->index].desc,
 800                 sizeof(vfd->description));
 801         vfd->pixelformat = usbvision_v4l2_format[vfd->index].format;
 802         return 0;
 803 }
 804
 805 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
 806                                         struct v4l2_format *vf)
 807 {
 808         struct usb_usbvision *usbvision = video_drvdata(file);
 809         vf->fmt.pix.width = usbvision->curwidth;
 810         vf->fmt.pix.height = usbvision->curheight;
 811         vf->fmt.pix.pixelformat = usbvision->palette.format;
 812         vf->fmt.pix.bytesperline =
 813                 usbvision->curwidth * usbvision->palette.bytes_per_pixel;
 814         vf->fmt.pix.sizeimage = vf->fmt.pix.bytesperline * usbvision->curheight;
 815         vf->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 816         vf->fmt.pix.field = V4L2_FIELD_NONE; /* Always progressive image */
 817
 818         return 0;
 819 }
 820
 821 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 822                                struct v4l2_format *vf)
 823 {
 824         struct usb_usbvision *usbvision = video_drvdata(file);
 825         int format_idx;
 826
 827         /* Find requested format in available ones */
 828         for (format_idx = 0; format_idx < USBVISION_SUPPORTED_PALETTES; format_idx++) {
 829                 if (vf->fmt.pix.pixelformat ==
 830                    usbvision_v4l2_format[format_idx].format) {
 831                         usbvision->palette = usbvision_v4l2_format[format_idx];
 832                         break;
 833                 }
 834         }
 835         /* robustness */
 836         if (format_idx == USBVISION_SUPPORTED_PALETTES)
 837                 return -EINVAL;
 838         RESTRICT_TO_RANGE(vf->fmt.pix.width, MIN_FRAME_WIDTH, MAX_FRAME_WIDTH);
 839         RESTRICT_TO_RANGE(vf->fmt.pix.height, MIN_FRAME_HEIGHT, MAX_FRAME_HEIGHT);
 840
 841         vf->fmt.pix.bytesperline = vf->fmt.pix.width*
 842                 usbvision->palette.bytes_per_pixel;
 843         vf->fmt.pix.sizeimage = vf->fmt.pix.bytesperline*vf->fmt.pix.height;
 844         vf->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 845         vf->fmt.pix.field = V4L2_FIELD_NONE; /* Always progressive image */
 846
 847         return 0;
 848 }
 849
 850 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 851                                struct v4l2_format *vf)
 852 {
 853         struct usb_usbvision *usbvision = video_drvdata(file);
 854         int ret;
 855
 856         ret = vidioc_try_fmt_vid_cap(file, priv, vf);
 857         if (ret)
 858                 return ret;
 859
 860         /* stop io in case it is already in progress */
 861         if (usbvision->streaming == stream_on) {
 862                 ret = usbvision_stream_interrupt(usbvision);
 863                 if (ret)
 864                         return ret;
 865         }
 866         usbvision_frames_free(usbvision);
 867         usbvision_empty_framequeues(usbvision);
 868
 869         usbvision->cur_frame = NULL;
 870
 871         /* by now we are committed to the new data... */
 872         usbvision_set_output(usbvision, vf->fmt.pix.width, vf->fmt.pix.height);
 873
 874         return 0;
 875 }
 876
 877 static ssize_t usbvision_read(struct file *file, char __user *buf,
 878                       size_t count, loff_t *ppos)
 879 {
 880         struct usb_usbvision *usbvision = video_drvdata(file);
 881         int noblock = file->f_flags & O_NONBLOCK;
 882         unsigned long lock_flags;
 883         int ret, i;
 884         struct usbvision_frame *frame;
 885
 886         PDEBUG(DBG_IO, "%s: %ld bytes, noblock=%d", __func__,
 887                (unsigned long)count, noblock);
 888
 889         if (!USBVISION_IS_OPERATIONAL(usbvision) || !buf)
 890                 return -EFAULT;
 891
 892         /* This entry point is compatible with the mmap routines
 893            so that a user can do either VIDIOC_QBUF/VIDIOC_DQBUF
 894            to get frames or call read on the device. */
 895         if (!usbvision->num_frames) {
 896                 /* First, allocate some frames to work with
 897                    if this has not been done with VIDIOC_REQBUF */
 898                 usbvision_frames_free(usbvision);
 899                 usbvision_empty_framequeues(usbvision);
 900                 usbvision_frames_alloc(usbvision, USBVISION_NUMFRAMES);
 901         }
 902
 903         if (usbvision->streaming != stream_on) {
 904                 /* no stream is running, make it running ! */
 905                 usbvision->streaming = stream_on;
 906                 call_all(usbvision, video, s_stream, 1);
 907         }
 908
 909         /* Then, enqueue as many frames as possible
 910            (like a user of VIDIOC_QBUF would do) */
 911         for (i = 0; i < usbvision->num_frames; i++) {
 912                 frame = &usbvision->frame[i];
 913                 if (frame->grabstate == frame_state_unused) {
 914                         /* Mark it as ready and enqueue frame */
 915                         frame->grabstate = frame_state_ready;
 916                         frame->scanstate = scan_state_scanning;
 917                         /* Accumulated in usbvision_parse_data() */
 918                         frame->scanlength = 0;
 919
 920                         /* set v4l2_format index */
 921                         frame->v4l2_format = usbvision->palette;
 922
 923                         spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
 924                         list_add_tail(&frame->frame, &usbvision->inqueue);
 925                         spin_unlock_irqrestore(&usbvision->queue_lock,
 926                                                lock_flags);
 927                 }
 928         }
 929
 930         /* Then try to steal a frame (like a VIDIOC_DQBUF would do) */
 931         if (list_empty(&(usbvision->outqueue))) {
 932                 if (noblock)
 933                         return -EAGAIN;
 934
 935                 ret = wait_event_interruptible
 936                         (usbvision->wait_frame,
 937                          !list_empty(&(usbvision->outqueue)));
 938                 if (ret)
 939                         return ret;
 940         }
 941
 942         spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
 943         frame = list_entry(usbvision->outqueue.next,
 944                            struct usbvision_frame, frame);
 945         list_del(usbvision->outqueue.next);
 946         spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
 947
 948         /* An error returns an empty frame */
 949         if (frame->grabstate == frame_state_error) {
 950                 frame->bytes_read = 0;
 951                 return 0;
 952         }
 953
 954         PDEBUG(DBG_IO, "%s: frmx=%d, bytes_read=%ld, scanlength=%ld",
 955                __func__,
 956                frame->index, frame->bytes_read, frame->scanlength);
 957
 958         /* copy bytes to user space; we allow for partials reads */
 959         if ((count + frame->bytes_read) > (unsigned long)frame->scanlength)
 960                 count = frame->scanlength - frame->bytes_read;
 961
 962         if (copy_to_user(buf, frame->data + frame->bytes_read, count))
 963                 return -EFAULT;
 964
 965         frame->bytes_read += count;
 966         PDEBUG(DBG_IO, "%s: {copy} count used=%ld, new bytes_read=%ld",
 967                __func__,
 968                (unsigned long)count, frame->bytes_read);
 969
 970 #if 1
 971         /*
 972          * FIXME:
 973          * For now, forget the frame if it has not been read in one shot.
 974          */
 975         frame->bytes_read = 0;
 976
 977         /* Mark it as available to be used again. */
 978         frame->grabstate = frame_state_unused;
 979 #else
 980         if (frame->bytes_read >= frame->scanlength) {
 981                 /* All data has been read */
 982                 frame->bytes_read = 0;
 983
 984                 /* Mark it as available to be used again. */
 985                 frame->grabstate = frame_state_unused;
 986         }
 987 #endif
 988
 989         return count;
 990 }
 991
 992 static ssize_t usbvision_v4l2_read(struct file *file, char __user *buf,
 993                       size_t count, loff_t *ppos)
 994 {
 995         struct usb_usbvision *usbvision = video_drvdata(file);
 996         int res;
 997
 998         if (mutex_lock_interruptible(&usbvision->v4l2_lock))
 999                 return -ERESTARTSYS;
1000         res = usbvision_read(file, buf, count, ppos);
1001         mutex_unlock(&usbvision->v4l2_lock);
1002         return res;
1003 }
1004
1005 static int usbvision_mmap(struct file *file, struct vm_area_struct *vma)
1006 {
1007         unsigned long size = vma->vm_end - vma->vm_start,
1008                 start = vma->vm_start;
1009         void *pos;
1010         u32 i;
1011         struct usb_usbvision *usbvision = video_drvdata(file);
1012
1013         PDEBUG(DBG_MMAP, "mmap");
1014
1015         if (!USBVISION_IS_OPERATIONAL(usbvision))
1016                 return -EFAULT;
1017
1018         if (!(vma->vm_flags & VM_WRITE) ||
1019             size != PAGE_ALIGN(usbvision->max_frame_size)) {
1020                 return -EINVAL;
1021         }
1022
1023         for (i = 0; i < usbvision->num_frames; i++) {
1024                 if (((PAGE_ALIGN(usbvision->max_frame_size)*i) >> PAGE_SHIFT) ==
1025                     vma->vm_pgoff)
1026                         break;
1027         }
1028         if (i == usbvision->num_frames) {
1029                 PDEBUG(DBG_MMAP,
1030                        "mmap: user supplied mapping address is out of range");
1031                 return -EINVAL;
1032         }
1033
1034         /* VM_IO is eventually going to replace PageReserved altogether */
1035         vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
1036
1037         pos = usbvision->frame[i].data;
1038         while (size > 0) {
1039                 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1040                         PDEBUG(DBG_MMAP, "mmap: vm_insert_page failed");
1041                         return -EAGAIN;
1042                 }
1043                 start += PAGE_SIZE;
1044                 pos += PAGE_SIZE;
1045                 size -= PAGE_SIZE;
1046         }
1047
1048         return 0;
1049 }
1050
1051 static int usbvision_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
1052 {
1053         struct usb_usbvision *usbvision = video_drvdata(file);
1054         int res;
1055
1056         if (mutex_lock_interruptible(&usbvision->v4l2_lock))
1057                 return -ERESTARTSYS;
1058         res = usbvision_mmap(file, vma);
1059         mutex_unlock(&usbvision->v4l2_lock);
1060         return res;
1061 }
1062
1063 /*
1064  * Here comes the stuff for radio on usbvision based devices
1065  *
1066  */
1067 static int usbvision_radio_open(struct file *file)
1068 {
1069         struct usb_usbvision *usbvision = video_drvdata(file);
1070         int err_code = 0;
1071
1072         PDEBUG(DBG_IO, "%s:", __func__);
1073
1074         if (mutex_lock_interruptible(&usbvision->v4l2_lock))
1075                 return -ERESTARTSYS;
1076         err_code = v4l2_fh_open(file);
1077         if (err_code)
1078                 goto out;
1079         if (usbvision->user) {
1080                 dev_err(&usbvision->rdev.dev,
1081                         "%s: Someone tried to open an already opened USBVision Radio!\n",
1082                                 __func__);
1083                 err_code = -EBUSY;
1084         } else {
1085                 /* Alternate interface 1 is is the biggest frame size */
1086                 err_code = usbvision_set_alternate(usbvision);
1087                 if (err_code < 0) {
1088                         usbvision->last_error = err_code;
1089                         err_code = -EBUSY;
1090                         goto out;
1091                 }
1092
1093                 /* If so far no errors then we shall start the radio */
1094                 usbvision->radio = 1;
1095                 call_all(usbvision, tuner, s_radio);
1096                 usbvision_set_audio(usbvision, USBVISION_AUDIO_RADIO);
1097                 usbvision->user++;
1098         }
1099 out:
1100         mutex_unlock(&usbvision->v4l2_lock);
1101         return err_code;
1102 }
1103
1104
1105 static int usbvision_radio_close(struct file *file)
1106 {
1107         struct usb_usbvision *usbvision = video_drvdata(file);
1108
1109         PDEBUG(DBG_IO, "");
1110
1111         mutex_lock(&usbvision->v4l2_lock);
1112         /* Set packet size to 0 */
1113         usbvision->iface_alt = 0;
1114         usb_set_interface(usbvision->dev, usbvision->iface,
1115                                     usbvision->iface_alt);
1116
1117         usbvision_audio_off(usbvision);
1118         usbvision->radio = 0;
1119         usbvision->user--;
1120         mutex_unlock(&usbvision->v4l2_lock);
1121
1122         if (usbvision->remove_pending) {
1123                 printk(KERN_INFO "%s: Final disconnect\n", __func__);
1124                 v4l2_fh_release(file);
1125                 usbvision_release(usbvision);
1126                 return 0;
1127         }
1128
1129         PDEBUG(DBG_IO, "success");
1130         return v4l2_fh_release(file);
1131 }
1132
1133 /* Video registration stuff */
1134
1135 /* Video template */
1136 static const struct v4l2_file_operations usbvision_fops = {
1137         .owner             = THIS_MODULE,
1138         .open           = usbvision_v4l2_open,
1139         .release        = usbvision_v4l2_close,
1140         .read           = usbvision_v4l2_read,
1141         .mmap           = usbvision_v4l2_mmap,
1142         .unlocked_ioctl = video_ioctl2,
1143 };
1144
1145 static const struct v4l2_ioctl_ops usbvision_ioctl_ops = {
1146         .vidioc_querycap      = vidioc_querycap,
1147         .vidioc_enum_fmt_vid_cap  = vidioc_enum_fmt_vid_cap,
1148         .vidioc_g_fmt_vid_cap     = vidioc_g_fmt_vid_cap,
1149         .vidioc_try_fmt_vid_cap   = vidioc_try_fmt_vid_cap,
1150         .vidioc_s_fmt_vid_cap     = vidioc_s_fmt_vid_cap,
1151         .vidioc_reqbufs       = vidioc_reqbufs,
1152         .vidioc_querybuf      = vidioc_querybuf,
1153         .vidioc_qbuf          = vidioc_qbuf,
1154         .vidioc_dqbuf         = vidioc_dqbuf,
1155         .vidioc_s_std         = vidioc_s_std,
1156         .vidioc_g_std         = vidioc_g_std,
1157         .vidioc_enum_input    = vidioc_enum_input,
1158         .vidioc_g_input       = vidioc_g_input,
1159         .vidioc_s_input       = vidioc_s_input,
1160         .vidioc_streamon      = vidioc_streamon,
1161         .vidioc_streamoff     = vidioc_streamoff,
1162         .vidioc_g_tuner       = vidioc_g_tuner,
1163         .vidioc_s_tuner       = vidioc_s_tuner,
1164         .vidioc_g_frequency   = vidioc_g_frequency,
1165         .vidioc_s_frequency   = vidioc_s_frequency,
1166         .vidioc_log_status    = v4l2_ctrl_log_status,
1167         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1168         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1169 #ifdef CONFIG_VIDEO_ADV_DEBUG
1170         .vidioc_g_register    = vidioc_g_register,
1171         .vidioc_s_register    = vidioc_s_register,
1172 #endif
1173 };
1174
1175 static struct video_device usbvision_video_template = {
1176         .fops           = &usbvision_fops,
1177         .ioctl_ops      = &usbvision_ioctl_ops,
1178         .name           = "usbvision-video",
1179         .release        = video_device_release_empty,
1180         .tvnorms        = USBVISION_NORMS,
1181 };
1182
1183
1184 /* Radio template */
1185 static const struct v4l2_file_operations usbvision_radio_fops = {
1186         .owner             = THIS_MODULE,
1187         .open           = usbvision_radio_open,
1188         .release        = usbvision_radio_close,
1189         .poll           = v4l2_ctrl_poll,
1190         .unlocked_ioctl = video_ioctl2,
1191 };
1192
1193 static const struct v4l2_ioctl_ops usbvision_radio_ioctl_ops = {
1194         .vidioc_querycap      = vidioc_querycap,
1195         .vidioc_g_tuner       = vidioc_g_tuner,
1196         .vidioc_s_tuner       = vidioc_s_tuner,
1197         .vidioc_g_frequency   = vidioc_g_frequency,
1198         .vidioc_s_frequency   = vidioc_s_frequency,
1199         .vidioc_log_status    = v4l2_ctrl_log_status,
1200         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1201         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1202 };
1203
1204 static struct video_device usbvision_radio_template = {
1205         .fops           = &usbvision_radio_fops,
1206         .name           = "usbvision-radio",
1207         .release        = video_device_release_empty,
1208         .ioctl_ops      = &usbvision_radio_ioctl_ops,
1209 };
1210
1211
1212 static void usbvision_vdev_init(struct usb_usbvision *usbvision,
1213                                 struct video_device *vdev,
1214                                 const struct video_device *vdev_template,
1215                                 const char *name)
1216 {
1217         struct usb_device *usb_dev = usbvision->dev;
1218
1219         if (!usb_dev) {
1220                 dev_err(&usbvision->dev->dev,
1221                         "%s: usbvision->dev is not set\n", __func__);
1222                 return;
1223         }
1224
1225         *vdev = *vdev_template;
1226         vdev->lock = &usbvision->v4l2_lock;
1227         vdev->v4l2_dev = &usbvision->v4l2_dev;
1228         snprintf(vdev->name, sizeof(vdev->name), "%s", name);
1229         video_set_drvdata(vdev, usbvision);
1230 }
1231
1232 /* unregister video4linux devices */
1233 static void usbvision_unregister_video(struct usb_usbvision *usbvision)
1234 {
1235         /* Radio Device: */
1236         if (video_is_registered(&usbvision->rdev)) {
1237                 PDEBUG(DBG_PROBE, "unregister %s [v4l2]",
1238                        video_device_node_name(&usbvision->rdev));
1239                 video_unregister_device(&usbvision->rdev);
1240         }
1241
1242         /* Video Device: */
1243         if (video_is_registered(&usbvision->vdev)) {
1244                 PDEBUG(DBG_PROBE, "unregister %s [v4l2]",
1245                        video_device_node_name(&usbvision->vdev));
1246                 video_unregister_device(&usbvision->vdev);
1247         }
1248 }
1249
1250 /* register video4linux devices */
1251 static int usbvision_register_video(struct usb_usbvision *usbvision)
1252 {
1253         int res = -ENOMEM;
1254
1255         /* Video Device: */
1256         usbvision_vdev_init(usbvision, &usbvision->vdev,
1257                               &usbvision_video_template, "USBVision Video");
1258         if (!usbvision->have_tuner) {
1259                 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_G_FREQUENCY);
1260                 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_S_TUNER);
1261                 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_G_FREQUENCY);
1262                 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_S_TUNER);
1263         }
1264         usbvision->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE |
1265                                       V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1266         if (usbvision->have_tuner)
1267                 usbvision->vdev.device_caps |= V4L2_CAP_TUNER;
1268
1269         if (video_register_device(&usbvision->vdev, VFL_TYPE_GRABBER, video_nr) < 0)
1270                 goto err_exit;
1271         printk(KERN_INFO "USBVision[%d]: registered USBVision Video device %s [v4l2]\n",
1272                usbvision->nr, video_device_node_name(&usbvision->vdev));
1273
1274         /* Radio Device: */
1275         if (usbvision_device_data[usbvision->dev_model].radio) {
1276                 /* usbvision has radio */
1277                 usbvision_vdev_init(usbvision, &usbvision->rdev,
1278                               &usbvision_radio_template, "USBVision Radio");
1279                 usbvision->rdev.device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER;
1280                 if (video_register_device(&usbvision->rdev, VFL_TYPE_RADIO, radio_nr) < 0)
1281                         goto err_exit;
1282                 printk(KERN_INFO "USBVision[%d]: registered USBVision Radio device %s [v4l2]\n",
1283                        usbvision->nr, video_device_node_name(&usbvision->rdev));
1284         }
1285         /* all done */
1286         return 0;
1287
1288  err_exit:
1289         dev_err(&usbvision->dev->dev,
1290                 "USBVision[%d]: video_register_device() failed\n",
1291                         usbvision->nr);
1292         usbvision_unregister_video(usbvision);
1293         return res;
1294 }
1295
1296 /*
1297  * usbvision_alloc()
1298  *
1299  * This code allocates the struct usb_usbvision.
1300  * It is filled with default values.
1301  *
1302  * Returns NULL on error, a pointer to usb_usbvision else.
1303  *
1304  */
1305 static struct usb_usbvision *usbvision_alloc(struct usb_device *dev,
1306                                              struct usb_interface *intf)
1307 {
1308         struct usb_usbvision *usbvision;
1309
1310         usbvision = kzalloc(sizeof(*usbvision), GFP_KERNEL);
1311         if (!usbvision)
1312                 return NULL;
1313
1314         usbvision->dev = dev;
1315         if (v4l2_device_register(&intf->dev, &usbvision->v4l2_dev))
1316                 goto err_free;
1317
1318         if (v4l2_ctrl_handler_init(&usbvision->hdl, 4))
1319                 goto err_unreg;
1320         usbvision->v4l2_dev.ctrl_handler = &usbvision->hdl;
1321         mutex_init(&usbvision->v4l2_lock);
1322
1323         /* prepare control urb for control messages during interrupts */
1324         usbvision->ctrl_urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
1325         if (!usbvision->ctrl_urb)
1326                 goto err_unreg;
1327
1328         return usbvision;
1329
1330 err_unreg:
1331         v4l2_ctrl_handler_free(&usbvision->hdl);
1332         v4l2_device_unregister(&usbvision->v4l2_dev);
1333 err_free:
1334         kfree(usbvision);
1335         return NULL;
1336 }
1337
1338 /*
1339  * usbvision_release()
1340  *
1341  * This code does final release of struct usb_usbvision. This happens
1342  * after the device is disconnected -and- all clients closed their files.
1343  *
1344  */
1345 static void usbvision_release(struct usb_usbvision *usbvision)
1346 {
1347         PDEBUG(DBG_PROBE, "");
1348
1349         usbvision->initialized = 0;
1350
1351         usbvision_remove_sysfs(&usbvision->vdev);
1352         usbvision_unregister_video(usbvision);
1353         kfree(usbvision->alt_max_pkt_size);
1354
1355         usb_free_urb(usbvision->ctrl_urb);
1356
1357         v4l2_ctrl_handler_free(&usbvision->hdl);
1358         v4l2_device_unregister(&usbvision->v4l2_dev);
1359         kfree(usbvision);
1360
1361         PDEBUG(DBG_PROBE, "success");
1362 }
1363
1364
1365 /*********************** usb interface **********************************/
1366
1367 static void usbvision_configure_video(struct usb_usbvision *usbvision)
1368 {
1369         int model;
1370
1371         if (!usbvision)
1372                 return;
1373
1374         model = usbvision->dev_model;
1375         usbvision->palette = usbvision_v4l2_format[2]; /* V4L2_PIX_FMT_RGB24; */
1376
1377         if (usbvision_device_data[usbvision->dev_model].vin_reg2_override) {
1378                 usbvision->vin_reg2_preset =
1379                         usbvision_device_data[usbvision->dev_model].vin_reg2;
1380         } else {
1381                 usbvision->vin_reg2_preset = 0;
1382         }
1383
1384         usbvision->tvnorm_id = usbvision_device_data[model].video_norm;
1385         usbvision->video_inputs = usbvision_device_data[model].video_channels;
1386         usbvision->ctl_input = 0;
1387         usbvision->radio_freq = 87.5 * 16000;
1388         usbvision->tv_freq = 400 * 16;
1389
1390         /* This should be here to make i2c clients to be able to register */
1391         /* first switch off audio */
1392         if (usbvision_device_data[model].audio_channels > 0)
1393                 usbvision_audio_off(usbvision);
1394         /* and then power up the tuner */
1395         usbvision_power_on(usbvision);
1396         usbvision_i2c_register(usbvision);
1397 }
1398
1399 /*
1400  * usbvision_probe()
1401  *
1402  * This procedure queries device descriptor and accepts the interface
1403  * if it looks like USBVISION video device
1404  *
1405  */
1406 static int usbvision_probe(struct usb_interface *intf,
1407                            const struct usb_device_id *devid)
1408 {
1409         struct usb_device *dev = usb_get_dev(interface_to_usbdev(intf));
1410         struct usb_interface *uif;
1411         __u8 ifnum = intf->altsetting->desc.bInterfaceNumber;
1412         const struct usb_host_interface *interface;
1413         struct usb_usbvision *usbvision = NULL;
1414         const struct usb_endpoint_descriptor *endpoint;
1415         int model, i, ret;
1416
1417         PDEBUG(DBG_PROBE, "VID=%#04x, PID=%#04x, ifnum=%u",
1418                                 le16_to_cpu(dev->descriptor.idVendor),
1419                                 le16_to_cpu(dev->descriptor.idProduct), ifnum);
1420
1421         model = devid->driver_info;
1422         if (model < 0 || model >= usbvision_device_data_size) {
1423                 PDEBUG(DBG_PROBE, "model out of bounds %d", model);
1424                 ret = -ENODEV;
1425                 goto err_usb;
1426         }
1427         printk(KERN_INFO "%s: %s found\n", __func__,
1428                                 usbvision_device_data[model].model_string);
1429
1430         if (usbvision_device_data[model].interface >= 0)
1431                 interface = &dev->actconfig->interface[usbvision_device_data[model].interface]->altsetting[0];
1432         else if (ifnum < dev->actconfig->desc.bNumInterfaces)
1433                 interface = &dev->actconfig->interface[ifnum]->altsetting[0];
1434         else {
1435                 dev_err(&intf->dev, "interface %d is invalid, max is %d\n",
1436                     ifnum, dev->actconfig->desc.bNumInterfaces - 1);
1437                 ret = -ENODEV;
1438                 goto err_usb;
1439         }
1440
1441         if (interface->desc.bNumEndpoints < 2) {
1442                 dev_err(&intf->dev, "interface %d has %d endpoints, but must have minimum 2\n",
1443                         ifnum, interface->desc.bNumEndpoints);
1444                 ret = -ENODEV;
1445                 goto err_usb;
1446         }
1447         endpoint = &interface->endpoint[1].desc;
1448
1449         if (!usb_endpoint_xfer_isoc(endpoint)) {
1450                 dev_err(&intf->dev, "%s: interface %d. has non-ISO endpoint!\n",
1451                     __func__, ifnum);
1452                 dev_err(&intf->dev, "%s: Endpoint attributes %d",
1453                     __func__, endpoint->bmAttributes);
1454                 ret = -ENODEV;
1455                 goto err_usb;
1456         }
1457         if (usb_endpoint_dir_out(endpoint)) {
1458                 dev_err(&intf->dev, "%s: interface %d. has ISO OUT endpoint!\n",
1459                     __func__, ifnum);
1460                 ret = -ENODEV;
1461                 goto err_usb;
1462         }
1463
1464         usbvision = usbvision_alloc(dev, intf);
1465         if (!usbvision) {
1466                 dev_err(&intf->dev, "%s: couldn't allocate USBVision struct\n", __func__);
1467                 ret = -ENOMEM;
1468                 goto err_usb;
1469         }
1470
1471         if (dev->descriptor.bNumConfigurations > 1)
1472                 usbvision->bridge_type = BRIDGE_NT1004;
1473         else if (model == DAZZLE_DVC_90_REV_1_SECAM)
1474                 usbvision->bridge_type = BRIDGE_NT1005;
1475         else
1476                 usbvision->bridge_type = BRIDGE_NT1003;
1477         PDEBUG(DBG_PROBE, "bridge_type %d", usbvision->bridge_type);
1478
1479         /* compute alternate max packet sizes */
1480         uif = dev->actconfig->interface[0];
1481
1482         usbvision->num_alt = uif->num_altsetting;
1483         PDEBUG(DBG_PROBE, "Alternate settings: %i", usbvision->num_alt);
1484         usbvision->alt_max_pkt_size = kmalloc_array(32, usbvision->num_alt,
1485                                                     GFP_KERNEL);
1486         if (!usbvision->alt_max_pkt_size) {
1487                 ret = -ENOMEM;
1488                 goto err_pkt;
1489         }
1490
1491         for (i = 0; i < usbvision->num_alt; i++) {
1492                 u16 tmp;
1493
1494                 if (uif->altsetting[i].desc.bNumEndpoints < 2) {
1495                         ret = -ENODEV;
1496                         goto err_pkt;
1497                 }
1498
1499                 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1500                                       wMaxPacketSize);
1501                 usbvision->alt_max_pkt_size[i] =
1502                         (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1503                 PDEBUG(DBG_PROBE, "Alternate setting %i, max size= %i", i,
1504                        usbvision->alt_max_pkt_size[i]);
1505         }
1506
1507
1508         usbvision->nr = usbvision_nr++;
1509
1510         spin_lock_init(&usbvision->queue_lock);
1511         init_waitqueue_head(&usbvision->wait_frame);
1512         init_waitqueue_head(&usbvision->wait_stream);
1513
1514         usbvision->have_tuner = usbvision_device_data[model].tuner;
1515         if (usbvision->have_tuner)
1516                 usbvision->tuner_type = usbvision_device_data[model].tuner_type;
1517
1518         usbvision->dev_model = model;
1519         usbvision->remove_pending = 0;
1520         usbvision->iface = ifnum;
1521         usbvision->iface_alt = 0;
1522         usbvision->video_endp = endpoint->bEndpointAddress;
1523         usbvision->isoc_packet_size = 0;
1524         usbvision->usb_bandwidth = 0;
1525         usbvision->user = 0;
1526         usbvision->streaming = stream_off;
1527         usbvision_configure_video(usbvision);
1528         usbvision_register_video(usbvision);
1529
1530         usbvision_create_sysfs(&usbvision->vdev);
1531
1532         PDEBUG(DBG_PROBE, "success");
1533         return 0;
1534
1535 err_pkt:
1536         usbvision_release(usbvision);
1537 err_usb:
1538         usb_put_dev(dev);
1539         return ret;
1540 }
1541
1542
1543 /*
1544  * usbvision_disconnect()
1545  *
1546  * This procedure stops all driver activity, deallocates interface-private
1547  * structure (pointed by 'ptr') and after that driver should be removable
1548  * with no ill consequences.
1549  *
1550  */
1551 static void usbvision_disconnect(struct usb_interface *intf)
1552 {
1553         struct usb_usbvision *usbvision = to_usbvision(usb_get_intfdata(intf));
1554
1555         PDEBUG(DBG_PROBE, "");
1556
1557         if (!usbvision) {
1558                 pr_err("%s: usb_get_intfdata() failed\n", __func__);
1559                 return;
1560         }
1561
1562         mutex_lock(&usbvision->v4l2_lock);
1563
1564         /* At this time we ask to cancel outstanding URBs */
1565         usbvision_stop_isoc(usbvision);
1566
1567         v4l2_device_disconnect(&usbvision->v4l2_dev);
1568         usbvision_i2c_unregister(usbvision);
1569         usbvision->remove_pending = 1;  /* Now all ISO data will be ignored */
1570
1571         usb_put_dev(usbvision->dev);
1572         usbvision->dev = NULL;  /* USB device is no more */
1573
1574         mutex_unlock(&usbvision->v4l2_lock);
1575
1576         if (usbvision->user) {
1577                 printk(KERN_INFO "%s: In use, disconnect pending\n",
1578                        __func__);
1579                 wake_up_interruptible(&usbvision->wait_frame);
1580                 wake_up_interruptible(&usbvision->wait_stream);
1581         } else {
1582                 usbvision_release(usbvision);
1583         }
1584
1585         PDEBUG(DBG_PROBE, "success");
1586 }
1587
1588 static struct usb_driver usbvision_driver = {
1589         .name           = "usbvision",
1590         .id_table       = usbvision_table,
1591         .probe          = usbvision_probe,
1592         .disconnect     = usbvision_disconnect,
1593 };
1594
1595 /*
1596  * usbvision_init()
1597  *
1598  * This code is run to initialize the driver.
1599  *
1600  */
1601 static int __init usbvision_init(void)
1602 {
1603         int err_code;
1604
1605         PDEBUG(DBG_PROBE, "");
1606
1607         PDEBUG(DBG_IO,  "IO      debugging is enabled [video]");
1608         PDEBUG(DBG_PROBE, "PROBE   debugging is enabled [video]");
1609         PDEBUG(DBG_MMAP, "MMAP    debugging is enabled [video]");
1610
1611         /* disable planar mode support unless compression enabled */
1612         if (isoc_mode != ISOC_MODE_COMPRESS) {
1613                 /* FIXME : not the right way to set supported flag */
1614                 usbvision_v4l2_format[6].supported = 0; /* V4L2_PIX_FMT_YVU420 */
1615                 usbvision_v4l2_format[7].supported = 0; /* V4L2_PIX_FMT_YUV422P */
1616         }
1617
1618         err_code = usb_register(&usbvision_driver);
1619
1620         if (err_code == 0) {
1621                 printk(KERN_INFO DRIVER_DESC " : " USBVISION_VERSION_STRING "\n");
1622                 PDEBUG(DBG_PROBE, "success");
1623         }
1624         return err_code;
1625 }
1626
1627 static void __exit usbvision_exit(void)
1628 {
1629         PDEBUG(DBG_PROBE, "");
1630
1631         usb_deregister(&usbvision_driver);
1632         PDEBUG(DBG_PROBE, "success");
1633 }
1634
1635 module_init(usbvision_init);
1636 module_exit(usbvision_exit);