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         struct video_device *vdev = video_devdata(file);
 456
 457         strscpy(vc->driver, "USBVision", sizeof(vc->driver));
 458         strscpy(vc->card,
 459                 usbvision_device_data[usbvision->dev_model].model_string,
 460                 sizeof(vc->card));
 461         usb_make_path(usbvision->dev, vc->bus_info, sizeof(vc->bus_info));
 462         vc->device_caps = usbvision->have_tuner ? V4L2_CAP_TUNER : 0;
 463         if (vdev->vfl_type == VFL_TYPE_GRABBER)
 464                 vc->device_caps |= V4L2_CAP_VIDEO_CAPTURE |
 465                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
 466         else
 467                 vc->device_caps |= V4L2_CAP_RADIO;
 468
 469         vc->capabilities = vc->device_caps | V4L2_CAP_VIDEO_CAPTURE |
 470                 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS;
 471         if (usbvision_device_data[usbvision->dev_model].radio)
 472                 vc->capabilities |= V4L2_CAP_RADIO;
 473         return 0;
 474 }
 475
 476 static int vidioc_enum_input(struct file *file, void *priv,
 477                                 struct v4l2_input *vi)
 478 {
 479         struct usb_usbvision *usbvision = video_drvdata(file);
 480         int chan;
 481
 482         if (vi->index >= usbvision->video_inputs)
 483                 return -EINVAL;
 484         if (usbvision->have_tuner)
 485                 chan = vi->index;
 486         else
 487                 chan = vi->index + 1; /* skip Television string*/
 488
 489         /* Determine the requested input characteristics
 490            specific for each usbvision card model */
 491         switch (chan) {
 492         case 0:
 493                 if (usbvision_device_data[usbvision->dev_model].video_channels == 4) {
 494                         strscpy(vi->name, "White Video Input", sizeof(vi->name));
 495                 } else {
 496                         strscpy(vi->name, "Television", sizeof(vi->name));
 497                         vi->type = V4L2_INPUT_TYPE_TUNER;
 498                         vi->tuner = chan;
 499                         vi->std = USBVISION_NORMS;
 500                 }
 501                 break;
 502         case 1:
 503                 vi->type = V4L2_INPUT_TYPE_CAMERA;
 504                 if (usbvision_device_data[usbvision->dev_model].video_channels == 4)
 505                         strscpy(vi->name, "Green Video Input", sizeof(vi->name));
 506                 else
 507                         strscpy(vi->name, "Composite Video Input",
 508                                 sizeof(vi->name));
 509                 vi->std = USBVISION_NORMS;
 510                 break;
 511         case 2:
 512                 vi->type = V4L2_INPUT_TYPE_CAMERA;
 513                 if (usbvision_device_data[usbvision->dev_model].video_channels == 4)
 514                         strscpy(vi->name, "Yellow Video Input", sizeof(vi->name));
 515                 else
 516                         strscpy(vi->name, "S-Video Input", sizeof(vi->name));
 517                 vi->std = USBVISION_NORMS;
 518                 break;
 519         case 3:
 520                 vi->type = V4L2_INPUT_TYPE_CAMERA;
 521                 strscpy(vi->name, "Red Video Input", sizeof(vi->name));
 522                 vi->std = USBVISION_NORMS;
 523                 break;
 524         }
 525         return 0;
 526 }
 527
 528 static int vidioc_g_input(struct file *file, void *priv, unsigned int *input)
 529 {
 530         struct usb_usbvision *usbvision = video_drvdata(file);
 531
 532         *input = usbvision->ctl_input;
 533         return 0;
 534 }
 535
 536 static int vidioc_s_input(struct file *file, void *priv, unsigned int input)
 537 {
 538         struct usb_usbvision *usbvision = video_drvdata(file);
 539
 540         if (input >= usbvision->video_inputs)
 541                 return -EINVAL;
 542
 543         usbvision_muxsel(usbvision, input);
 544         usbvision_set_input(usbvision);
 545         usbvision_set_output(usbvision,
 546                              usbvision->curwidth,
 547                              usbvision->curheight);
 548         return 0;
 549 }
 550
 551 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
 552 {
 553         struct usb_usbvision *usbvision = video_drvdata(file);
 554
 555         usbvision->tvnorm_id = id;
 556
 557         call_all(usbvision, video, s_std, usbvision->tvnorm_id);
 558         /* propagate the change to the decoder */
 559         usbvision_muxsel(usbvision, usbvision->ctl_input);
 560
 561         return 0;
 562 }
 563
 564 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id)
 565 {
 566         struct usb_usbvision *usbvision = video_drvdata(file);
 567
 568         *id = usbvision->tvnorm_id;
 569         return 0;
 570 }
 571
 572 static int vidioc_g_tuner(struct file *file, void *priv,
 573                                 struct v4l2_tuner *vt)
 574 {
 575         struct usb_usbvision *usbvision = video_drvdata(file);
 576
 577         if (vt->index)  /* Only tuner 0 */
 578                 return -EINVAL;
 579         if (vt->type == V4L2_TUNER_RADIO)
 580                 strscpy(vt->name, "Radio", sizeof(vt->name));
 581         else
 582                 strscpy(vt->name, "Television", sizeof(vt->name));
 583
 584         /* Let clients fill in the remainder of this struct */
 585         call_all(usbvision, tuner, g_tuner, vt);
 586
 587         return 0;
 588 }
 589
 590 static int vidioc_s_tuner(struct file *file, void *priv,
 591                                 const struct v4l2_tuner *vt)
 592 {
 593         struct usb_usbvision *usbvision = video_drvdata(file);
 594
 595         /* Only one tuner for now */
 596         if (vt->index)
 597                 return -EINVAL;
 598         /* let clients handle this */
 599         call_all(usbvision, tuner, s_tuner, vt);
 600
 601         return 0;
 602 }
 603
 604 static int vidioc_g_frequency(struct file *file, void *priv,
 605                                 struct v4l2_frequency *freq)
 606 {
 607         struct usb_usbvision *usbvision = video_drvdata(file);
 608
 609         /* Only one tuner */
 610         if (freq->tuner)
 611                 return -EINVAL;
 612         if (freq->type == V4L2_TUNER_RADIO)
 613                 freq->frequency = usbvision->radio_freq;
 614         else
 615                 freq->frequency = usbvision->tv_freq;
 616
 617         return 0;
 618 }
 619
 620 static int vidioc_s_frequency(struct file *file, void *priv,
 621                                 const struct v4l2_frequency *freq)
 622 {
 623         struct usb_usbvision *usbvision = video_drvdata(file);
 624         struct v4l2_frequency new_freq = *freq;
 625
 626         /* Only one tuner for now */
 627         if (freq->tuner)
 628                 return -EINVAL;
 629
 630         call_all(usbvision, tuner, s_frequency, freq);
 631         call_all(usbvision, tuner, g_frequency, &new_freq);
 632         if (freq->type == V4L2_TUNER_RADIO)
 633                 usbvision->radio_freq = new_freq.frequency;
 634         else
 635                 usbvision->tv_freq = new_freq.frequency;
 636
 637         return 0;
 638 }
 639
 640 static int vidioc_reqbufs(struct file *file,
 641                            void *priv, struct v4l2_requestbuffers *vr)
 642 {
 643         struct usb_usbvision *usbvision = video_drvdata(file);
 644         int ret;
 645
 646         RESTRICT_TO_RANGE(vr->count, 1, USBVISION_NUMFRAMES);
 647
 648         /* Check input validity:
 649            the user must do a VIDEO CAPTURE and MMAP method. */
 650         if (vr->memory != V4L2_MEMORY_MMAP)
 651                 return -EINVAL;
 652
 653         if (usbvision->streaming == stream_on) {
 654                 ret = usbvision_stream_interrupt(usbvision);
 655                 if (ret)
 656                         return ret;
 657         }
 658
 659         usbvision_frames_free(usbvision);
 660         usbvision_empty_framequeues(usbvision);
 661         vr->count = usbvision_frames_alloc(usbvision, vr->count);
 662
 663         usbvision->cur_frame = NULL;
 664
 665         return 0;
 666 }
 667
 668 static int vidioc_querybuf(struct file *file,
 669                             void *priv, struct v4l2_buffer *vb)
 670 {
 671         struct usb_usbvision *usbvision = video_drvdata(file);
 672         struct usbvision_frame *frame;
 673
 674         /* FIXME : must control
 675            that buffers are mapped (VIDIOC_REQBUFS has been called) */
 676         if (vb->index >= usbvision->num_frames)
 677                 return -EINVAL;
 678         /* Updating the corresponding frame state */
 679         vb->flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 680         frame = &usbvision->frame[vb->index];
 681         if (frame->grabstate >= frame_state_ready)
 682                 vb->flags |= V4L2_BUF_FLAG_QUEUED;
 683         if (frame->grabstate >= frame_state_done)
 684                 vb->flags |= V4L2_BUF_FLAG_DONE;
 685         if (frame->grabstate == frame_state_unused)
 686                 vb->flags |= V4L2_BUF_FLAG_MAPPED;
 687         vb->memory = V4L2_MEMORY_MMAP;
 688
 689         vb->m.offset = vb->index * PAGE_ALIGN(usbvision->max_frame_size);
 690
 691         vb->memory = V4L2_MEMORY_MMAP;
 692         vb->field = V4L2_FIELD_NONE;
 693         vb->length = usbvision->curwidth *
 694                 usbvision->curheight *
 695                 usbvision->palette.bytes_per_pixel;
 696         vb->timestamp = ns_to_timeval(usbvision->frame[vb->index].ts);
 697         vb->sequence = usbvision->frame[vb->index].sequence;
 698         return 0;
 699 }
 700
 701 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *vb)
 702 {
 703         struct usb_usbvision *usbvision = video_drvdata(file);
 704         struct usbvision_frame *frame;
 705         unsigned long lock_flags;
 706
 707         /* FIXME : works only on VIDEO_CAPTURE MODE, MMAP. */
 708         if (vb->index >= usbvision->num_frames)
 709                 return -EINVAL;
 710
 711         frame = &usbvision->frame[vb->index];
 712
 713         if (frame->grabstate != frame_state_unused)
 714                 return -EAGAIN;
 715
 716         /* Mark it as ready and enqueue frame */
 717         frame->grabstate = frame_state_ready;
 718         frame->scanstate = scan_state_scanning;
 719         frame->scanlength = 0;  /* Accumulated in usbvision_parse_data() */
 720
 721         vb->flags &= ~V4L2_BUF_FLAG_DONE;
 722
 723         /* set v4l2_format index */
 724         frame->v4l2_format = usbvision->palette;
 725
 726         spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
 727         list_add_tail(&usbvision->frame[vb->index].frame, &usbvision->inqueue);
 728         spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
 729
 730         return 0;
 731 }
 732
 733 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *vb)
 734 {
 735         struct usb_usbvision *usbvision = video_drvdata(file);
 736         int ret;
 737         struct usbvision_frame *f;
 738         unsigned long lock_flags;
 739
 740         if (list_empty(&(usbvision->outqueue))) {
 741                 if (usbvision->streaming == stream_idle)
 742                         return -EINVAL;
 743                 ret = wait_event_interruptible
 744                         (usbvision->wait_frame,
 745                          !list_empty(&(usbvision->outqueue)));
 746                 if (ret)
 747                         return ret;
 748         }
 749
 750         spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
 751         f = list_entry(usbvision->outqueue.next,
 752                        struct usbvision_frame, frame);
 753         list_del(usbvision->outqueue.next);
 754         spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
 755
 756         f->grabstate = frame_state_unused;
 757
 758         vb->memory = V4L2_MEMORY_MMAP;
 759         vb->flags = V4L2_BUF_FLAG_MAPPED |
 760                 V4L2_BUF_FLAG_QUEUED |
 761                 V4L2_BUF_FLAG_DONE |
 762                 V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 763         vb->index = f->index;
 764         vb->sequence = f->sequence;
 765         vb->timestamp = ns_to_timeval(f->ts);
 766         vb->field = V4L2_FIELD_NONE;
 767         vb->bytesused = f->scanlength;
 768
 769         return 0;
 770 }
 771
 772 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 773 {
 774         struct usb_usbvision *usbvision = video_drvdata(file);
 775
 776         usbvision->streaming = stream_on;
 777         call_all(usbvision, video, s_stream, 1);
 778
 779         return 0;
 780 }
 781
 782 static int vidioc_streamoff(struct file *file,
 783                             void *priv, enum v4l2_buf_type type)
 784 {
 785         struct usb_usbvision *usbvision = video_drvdata(file);
 786
 787         if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 788                 return -EINVAL;
 789
 790         if (usbvision->streaming == stream_on) {
 791                 usbvision_stream_interrupt(usbvision);
 792                 /* Stop all video streamings */
 793                 call_all(usbvision, video, s_stream, 0);
 794         }
 795         usbvision_empty_framequeues(usbvision);
 796
 797         return 0;
 798 }
 799
 800 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
 801                                         struct v4l2_fmtdesc *vfd)
 802 {
 803         if (vfd->index >= USBVISION_SUPPORTED_PALETTES - 1)
 804                 return -EINVAL;
 805         strscpy(vfd->description, usbvision_v4l2_format[vfd->index].desc,
 806                 sizeof(vfd->description));
 807         vfd->pixelformat = usbvision_v4l2_format[vfd->index].format;
 808         return 0;
 809 }
 810
 811 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
 812                                         struct v4l2_format *vf)
 813 {
 814         struct usb_usbvision *usbvision = video_drvdata(file);
 815         vf->fmt.pix.width = usbvision->curwidth;
 816         vf->fmt.pix.height = usbvision->curheight;
 817         vf->fmt.pix.pixelformat = usbvision->palette.format;
 818         vf->fmt.pix.bytesperline =
 819                 usbvision->curwidth * usbvision->palette.bytes_per_pixel;
 820         vf->fmt.pix.sizeimage = vf->fmt.pix.bytesperline * usbvision->curheight;
 821         vf->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 822         vf->fmt.pix.field = V4L2_FIELD_NONE; /* Always progressive image */
 823
 824         return 0;
 825 }
 826
 827 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 828                                struct v4l2_format *vf)
 829 {
 830         struct usb_usbvision *usbvision = video_drvdata(file);
 831         int format_idx;
 832
 833         /* Find requested format in available ones */
 834         for (format_idx = 0; format_idx < USBVISION_SUPPORTED_PALETTES; format_idx++) {
 835                 if (vf->fmt.pix.pixelformat ==
 836                    usbvision_v4l2_format[format_idx].format) {
 837                         usbvision->palette = usbvision_v4l2_format[format_idx];
 838                         break;
 839                 }
 840         }
 841         /* robustness */
 842         if (format_idx == USBVISION_SUPPORTED_PALETTES)
 843                 return -EINVAL;
 844         RESTRICT_TO_RANGE(vf->fmt.pix.width, MIN_FRAME_WIDTH, MAX_FRAME_WIDTH);
 845         RESTRICT_TO_RANGE(vf->fmt.pix.height, MIN_FRAME_HEIGHT, MAX_FRAME_HEIGHT);
 846
 847         vf->fmt.pix.bytesperline = vf->fmt.pix.width*
 848                 usbvision->palette.bytes_per_pixel;
 849         vf->fmt.pix.sizeimage = vf->fmt.pix.bytesperline*vf->fmt.pix.height;
 850         vf->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 851         vf->fmt.pix.field = V4L2_FIELD_NONE; /* Always progressive image */
 852
 853         return 0;
 854 }
 855
 856 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 857                                struct v4l2_format *vf)
 858 {
 859         struct usb_usbvision *usbvision = video_drvdata(file);
 860         int ret;
 861
 862         ret = vidioc_try_fmt_vid_cap(file, priv, vf);
 863         if (ret)
 864                 return ret;
 865
 866         /* stop io in case it is already in progress */
 867         if (usbvision->streaming == stream_on) {
 868                 ret = usbvision_stream_interrupt(usbvision);
 869                 if (ret)
 870                         return ret;
 871         }
 872         usbvision_frames_free(usbvision);
 873         usbvision_empty_framequeues(usbvision);
 874
 875         usbvision->cur_frame = NULL;
 876
 877         /* by now we are committed to the new data... */
 878         usbvision_set_output(usbvision, vf->fmt.pix.width, vf->fmt.pix.height);
 879
 880         return 0;
 881 }
 882
 883 static ssize_t usbvision_read(struct file *file, char __user *buf,
 884                       size_t count, loff_t *ppos)
 885 {
 886         struct usb_usbvision *usbvision = video_drvdata(file);
 887         int noblock = file->f_flags & O_NONBLOCK;
 888         unsigned long lock_flags;
 889         int ret, i;
 890         struct usbvision_frame *frame;
 891
 892         PDEBUG(DBG_IO, "%s: %ld bytes, noblock=%d", __func__,
 893                (unsigned long)count, noblock);
 894
 895         if (!USBVISION_IS_OPERATIONAL(usbvision) || !buf)
 896                 return -EFAULT;
 897
 898         /* This entry point is compatible with the mmap routines
 899            so that a user can do either VIDIOC_QBUF/VIDIOC_DQBUF
 900            to get frames or call read on the device. */
 901         if (!usbvision->num_frames) {
 902                 /* First, allocate some frames to work with
 903                    if this has not been done with VIDIOC_REQBUF */
 904                 usbvision_frames_free(usbvision);
 905                 usbvision_empty_framequeues(usbvision);
 906                 usbvision_frames_alloc(usbvision, USBVISION_NUMFRAMES);
 907         }
 908
 909         if (usbvision->streaming != stream_on) {
 910                 /* no stream is running, make it running ! */
 911                 usbvision->streaming = stream_on;
 912                 call_all(usbvision, video, s_stream, 1);
 913         }
 914
 915         /* Then, enqueue as many frames as possible
 916            (like a user of VIDIOC_QBUF would do) */
 917         for (i = 0; i < usbvision->num_frames; i++) {
 918                 frame = &usbvision->frame[i];
 919                 if (frame->grabstate == frame_state_unused) {
 920                         /* Mark it as ready and enqueue frame */
 921                         frame->grabstate = frame_state_ready;
 922                         frame->scanstate = scan_state_scanning;
 923                         /* Accumulated in usbvision_parse_data() */
 924                         frame->scanlength = 0;
 925
 926                         /* set v4l2_format index */
 927                         frame->v4l2_format = usbvision->palette;
 928
 929                         spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
 930                         list_add_tail(&frame->frame, &usbvision->inqueue);
 931                         spin_unlock_irqrestore(&usbvision->queue_lock,
 932                                                lock_flags);
 933                 }
 934         }
 935
 936         /* Then try to steal a frame (like a VIDIOC_DQBUF would do) */
 937         if (list_empty(&(usbvision->outqueue))) {
 938                 if (noblock)
 939                         return -EAGAIN;
 940
 941                 ret = wait_event_interruptible
 942                         (usbvision->wait_frame,
 943                          !list_empty(&(usbvision->outqueue)));
 944                 if (ret)
 945                         return ret;
 946         }
 947
 948         spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
 949         frame = list_entry(usbvision->outqueue.next,
 950                            struct usbvision_frame, frame);
 951         list_del(usbvision->outqueue.next);
 952         spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
 953
 954         /* An error returns an empty frame */
 955         if (frame->grabstate == frame_state_error) {
 956                 frame->bytes_read = 0;
 957                 return 0;
 958         }
 959
 960         PDEBUG(DBG_IO, "%s: frmx=%d, bytes_read=%ld, scanlength=%ld",
 961                __func__,
 962                frame->index, frame->bytes_read, frame->scanlength);
 963
 964         /* copy bytes to user space; we allow for partials reads */
 965         if ((count + frame->bytes_read) > (unsigned long)frame->scanlength)
 966                 count = frame->scanlength - frame->bytes_read;
 967
 968         if (copy_to_user(buf, frame->data + frame->bytes_read, count))
 969                 return -EFAULT;
 970
 971         frame->bytes_read += count;
 972         PDEBUG(DBG_IO, "%s: {copy} count used=%ld, new bytes_read=%ld",
 973                __func__,
 974                (unsigned long)count, frame->bytes_read);
 975
 976 #if 1
 977         /*
 978          * FIXME:
 979          * For now, forget the frame if it has not been read in one shot.
 980          */
 981         frame->bytes_read = 0;
 982
 983         /* Mark it as available to be used again. */
 984         frame->grabstate = frame_state_unused;
 985 #else
 986         if (frame->bytes_read >= frame->scanlength) {
 987                 /* All data has been read */
 988                 frame->bytes_read = 0;
 989
 990                 /* Mark it as available to be used again. */
 991                 frame->grabstate = frame_state_unused;
 992         }
 993 #endif
 994
 995         return count;
 996 }
 997
 998 static ssize_t usbvision_v4l2_read(struct file *file, char __user *buf,
 999                       size_t count, loff_t *ppos)
1000 {
1001         struct usb_usbvision *usbvision = video_drvdata(file);
1002         int res;
1003
1004         if (mutex_lock_interruptible(&usbvision->v4l2_lock))
1005                 return -ERESTARTSYS;
1006         res = usbvision_read(file, buf, count, ppos);
1007         mutex_unlock(&usbvision->v4l2_lock);
1008         return res;
1009 }
1010
1011 static int usbvision_mmap(struct file *file, struct vm_area_struct *vma)
1012 {
1013         unsigned long size = vma->vm_end - vma->vm_start,
1014                 start = vma->vm_start;
1015         void *pos;
1016         u32 i;
1017         struct usb_usbvision *usbvision = video_drvdata(file);
1018
1019         PDEBUG(DBG_MMAP, "mmap");
1020
1021         if (!USBVISION_IS_OPERATIONAL(usbvision))
1022                 return -EFAULT;
1023
1024         if (!(vma->vm_flags & VM_WRITE) ||
1025             size != PAGE_ALIGN(usbvision->max_frame_size)) {
1026                 return -EINVAL;
1027         }
1028
1029         for (i = 0; i < usbvision->num_frames; i++) {
1030                 if (((PAGE_ALIGN(usbvision->max_frame_size)*i) >> PAGE_SHIFT) ==
1031                     vma->vm_pgoff)
1032                         break;
1033         }
1034         if (i == usbvision->num_frames) {
1035                 PDEBUG(DBG_MMAP,
1036                        "mmap: user supplied mapping address is out of range");
1037                 return -EINVAL;
1038         }
1039
1040         /* VM_IO is eventually going to replace PageReserved altogether */
1041         vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
1042
1043         pos = usbvision->frame[i].data;
1044         while (size > 0) {
1045                 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1046                         PDEBUG(DBG_MMAP, "mmap: vm_insert_page failed");
1047                         return -EAGAIN;
1048                 }
1049                 start += PAGE_SIZE;
1050                 pos += PAGE_SIZE;
1051                 size -= PAGE_SIZE;
1052         }
1053
1054         return 0;
1055 }
1056
1057 static int usbvision_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
1058 {
1059         struct usb_usbvision *usbvision = video_drvdata(file);
1060         int res;
1061
1062         if (mutex_lock_interruptible(&usbvision->v4l2_lock))
1063                 return -ERESTARTSYS;
1064         res = usbvision_mmap(file, vma);
1065         mutex_unlock(&usbvision->v4l2_lock);
1066         return res;
1067 }
1068
1069 /*
1070  * Here comes the stuff for radio on usbvision based devices
1071  *
1072  */
1073 static int usbvision_radio_open(struct file *file)
1074 {
1075         struct usb_usbvision *usbvision = video_drvdata(file);
1076         int err_code = 0;
1077
1078         PDEBUG(DBG_IO, "%s:", __func__);
1079
1080         if (mutex_lock_interruptible(&usbvision->v4l2_lock))
1081                 return -ERESTARTSYS;
1082         err_code = v4l2_fh_open(file);
1083         if (err_code)
1084                 goto out;
1085         if (usbvision->user) {
1086                 dev_err(&usbvision->rdev.dev,
1087                         "%s: Someone tried to open an already opened USBVision Radio!\n",
1088                                 __func__);
1089                 err_code = -EBUSY;
1090         } else {
1091                 /* Alternate interface 1 is is the biggest frame size */
1092                 err_code = usbvision_set_alternate(usbvision);
1093                 if (err_code < 0) {
1094                         usbvision->last_error = err_code;
1095                         err_code = -EBUSY;
1096                         goto out;
1097                 }
1098
1099                 /* If so far no errors then we shall start the radio */
1100                 usbvision->radio = 1;
1101                 call_all(usbvision, tuner, s_radio);
1102                 usbvision_set_audio(usbvision, USBVISION_AUDIO_RADIO);
1103                 usbvision->user++;
1104         }
1105 out:
1106         mutex_unlock(&usbvision->v4l2_lock);
1107         return err_code;
1108 }
1109
1110
1111 static int usbvision_radio_close(struct file *file)
1112 {
1113         struct usb_usbvision *usbvision = video_drvdata(file);
1114
1115         PDEBUG(DBG_IO, "");
1116
1117         mutex_lock(&usbvision->v4l2_lock);
1118         /* Set packet size to 0 */
1119         usbvision->iface_alt = 0;
1120         usb_set_interface(usbvision->dev, usbvision->iface,
1121                                     usbvision->iface_alt);
1122
1123         usbvision_audio_off(usbvision);
1124         usbvision->radio = 0;
1125         usbvision->user--;
1126         mutex_unlock(&usbvision->v4l2_lock);
1127
1128         if (usbvision->remove_pending) {
1129                 printk(KERN_INFO "%s: Final disconnect\n", __func__);
1130                 v4l2_fh_release(file);
1131                 usbvision_release(usbvision);
1132                 return 0;
1133         }
1134
1135         PDEBUG(DBG_IO, "success");
1136         return v4l2_fh_release(file);
1137 }
1138
1139 /* Video registration stuff */
1140
1141 /* Video template */
1142 static const struct v4l2_file_operations usbvision_fops = {
1143         .owner             = THIS_MODULE,
1144         .open           = usbvision_v4l2_open,
1145         .release        = usbvision_v4l2_close,
1146         .read           = usbvision_v4l2_read,
1147         .mmap           = usbvision_v4l2_mmap,
1148         .unlocked_ioctl = video_ioctl2,
1149 };
1150
1151 static const struct v4l2_ioctl_ops usbvision_ioctl_ops = {
1152         .vidioc_querycap      = vidioc_querycap,
1153         .vidioc_enum_fmt_vid_cap  = vidioc_enum_fmt_vid_cap,
1154         .vidioc_g_fmt_vid_cap     = vidioc_g_fmt_vid_cap,
1155         .vidioc_try_fmt_vid_cap   = vidioc_try_fmt_vid_cap,
1156         .vidioc_s_fmt_vid_cap     = vidioc_s_fmt_vid_cap,
1157         .vidioc_reqbufs       = vidioc_reqbufs,
1158         .vidioc_querybuf      = vidioc_querybuf,
1159         .vidioc_qbuf          = vidioc_qbuf,
1160         .vidioc_dqbuf         = vidioc_dqbuf,
1161         .vidioc_s_std         = vidioc_s_std,
1162         .vidioc_g_std         = vidioc_g_std,
1163         .vidioc_enum_input    = vidioc_enum_input,
1164         .vidioc_g_input       = vidioc_g_input,
1165         .vidioc_s_input       = vidioc_s_input,
1166         .vidioc_streamon      = vidioc_streamon,
1167         .vidioc_streamoff     = vidioc_streamoff,
1168         .vidioc_g_tuner       = vidioc_g_tuner,
1169         .vidioc_s_tuner       = vidioc_s_tuner,
1170         .vidioc_g_frequency   = vidioc_g_frequency,
1171         .vidioc_s_frequency   = vidioc_s_frequency,
1172         .vidioc_log_status    = v4l2_ctrl_log_status,
1173         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1174         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1175 #ifdef CONFIG_VIDEO_ADV_DEBUG
1176         .vidioc_g_register    = vidioc_g_register,
1177         .vidioc_s_register    = vidioc_s_register,
1178 #endif
1179 };
1180
1181 static struct video_device usbvision_video_template = {
1182         .fops           = &usbvision_fops,
1183         .ioctl_ops      = &usbvision_ioctl_ops,
1184         .name           = "usbvision-video",
1185         .release        = video_device_release_empty,
1186         .tvnorms        = USBVISION_NORMS,
1187 };
1188
1189
1190 /* Radio template */
1191 static const struct v4l2_file_operations usbvision_radio_fops = {
1192         .owner             = THIS_MODULE,
1193         .open           = usbvision_radio_open,
1194         .release        = usbvision_radio_close,
1195         .poll           = v4l2_ctrl_poll,
1196         .unlocked_ioctl = video_ioctl2,
1197 };
1198
1199 static const struct v4l2_ioctl_ops usbvision_radio_ioctl_ops = {
1200         .vidioc_querycap      = vidioc_querycap,
1201         .vidioc_g_tuner       = vidioc_g_tuner,
1202         .vidioc_s_tuner       = vidioc_s_tuner,
1203         .vidioc_g_frequency   = vidioc_g_frequency,
1204         .vidioc_s_frequency   = vidioc_s_frequency,
1205         .vidioc_log_status    = v4l2_ctrl_log_status,
1206         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1207         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1208 };
1209
1210 static struct video_device usbvision_radio_template = {
1211         .fops           = &usbvision_radio_fops,
1212         .name           = "usbvision-radio",
1213         .release        = video_device_release_empty,
1214         .ioctl_ops      = &usbvision_radio_ioctl_ops,
1215 };
1216
1217
1218 static void usbvision_vdev_init(struct usb_usbvision *usbvision,
1219                                 struct video_device *vdev,
1220                                 const struct video_device *vdev_template,
1221                                 const char *name)
1222 {
1223         struct usb_device *usb_dev = usbvision->dev;
1224
1225         if (!usb_dev) {
1226                 dev_err(&usbvision->dev->dev,
1227                         "%s: usbvision->dev is not set\n", __func__);
1228                 return;
1229         }
1230
1231         *vdev = *vdev_template;
1232         vdev->lock = &usbvision->v4l2_lock;
1233         vdev->v4l2_dev = &usbvision->v4l2_dev;
1234         snprintf(vdev->name, sizeof(vdev->name), "%s", name);
1235         video_set_drvdata(vdev, usbvision);
1236 }
1237
1238 /* unregister video4linux devices */
1239 static void usbvision_unregister_video(struct usb_usbvision *usbvision)
1240 {
1241         /* Radio Device: */
1242         if (video_is_registered(&usbvision->rdev)) {
1243                 PDEBUG(DBG_PROBE, "unregister %s [v4l2]",
1244                        video_device_node_name(&usbvision->rdev));
1245                 video_unregister_device(&usbvision->rdev);
1246         }
1247
1248         /* Video Device: */
1249         if (video_is_registered(&usbvision->vdev)) {
1250                 PDEBUG(DBG_PROBE, "unregister %s [v4l2]",
1251                        video_device_node_name(&usbvision->vdev));
1252                 video_unregister_device(&usbvision->vdev);
1253         }
1254 }
1255
1256 /* register video4linux devices */
1257 static int usbvision_register_video(struct usb_usbvision *usbvision)
1258 {
1259         int res = -ENOMEM;
1260
1261         /* Video Device: */
1262         usbvision_vdev_init(usbvision, &usbvision->vdev,
1263                               &usbvision_video_template, "USBVision Video");
1264         if (!usbvision->have_tuner) {
1265                 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_G_FREQUENCY);
1266                 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_S_TUNER);
1267                 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_G_FREQUENCY);
1268                 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_S_TUNER);
1269         }
1270         if (video_register_device(&usbvision->vdev, VFL_TYPE_GRABBER, video_nr) < 0)
1271                 goto err_exit;
1272         printk(KERN_INFO "USBVision[%d]: registered USBVision Video device %s [v4l2]\n",
1273                usbvision->nr, video_device_node_name(&usbvision->vdev));
1274
1275         /* Radio Device: */
1276         if (usbvision_device_data[usbvision->dev_model].radio) {
1277                 /* usbvision has radio */
1278                 usbvision_vdev_init(usbvision, &usbvision->rdev,
1279                               &usbvision_radio_template, "USBVision Radio");
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);