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

   1 /*
   2  * USB USBVISION Video device driver 0.9.10
   3  *
   4  *
   5  *
   6  * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de>
   7  *
   8  * This module is part of usbvision driver project.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * Let's call the version 0.... until compression decoding is completely
  21  * implemented.
  22  *
  23  * This driver is written by Jose Ignacio Gijon and Joerg Heckenbach.
  24  * It was based on USB CPiA driver written by Peter Pregler,
  25  * Scott J. Bertin and Johannes Erdfelt
  26  * Ideas are taken from bttv driver by Ralph Metzler, Marcus Metzler &
  27  * Gerd Knorr and zoran 36120/36125 driver by Pauline Middelink
  28  * Updates to driver completed by Dwaine P. Garden
  29  *
  30  *
  31  * TODO:
  32  *     - use submit_urb for all setup packets
  33  *     - Fix memory settings for nt1004. It is 4 times as big as the
  34  *       nt1003 memory.
  35  *     - Add audio on endpoint 3 for nt1004 chip.
  36  *         Seems impossible, needs a codec interface.  Which one?
  37  *     - Clean up the driver.
  38  *     - optimization for performance.
  39  *     - Add Videotext capability (VBI).  Working on it.....
  40  *     - Check audio for other devices
  41  *
  42  */
  43
  44 #include <linux/kernel.h>
  45 #include <linux/list.h>
  46 #include <linux/timer.h>
  47 #include <linux/slab.h>
  48 #include <linux/mm.h>
  49 #include <linux/highmem.h>
  50 #include <linux/vmalloc.h>
  51 #include <linux/module.h>
  52 #include <linux/init.h>
  53 #include <linux/spinlock.h>
  54 #include <linux/io.h>
  55 #include <linux/videodev2.h>
  56 #include <linux/i2c.h>
  57
  58 #include <media/i2c/saa7115.h>
  59 #include <media/v4l2-common.h>
  60 #include <media/v4l2-ioctl.h>
  61 #include <media/v4l2-event.h>
  62 #include <media/tuner.h>
  63
  64 #include <linux/workqueue.h>
  65
  66 #include "usbvision.h"
  67 #include "usbvision-cards.h"
  68
  69 #define DRIVER_AUTHOR                                   \
  70         "Joerg Heckenbach <joerg@heckenbach-aw.de>, "   \
  71         "Dwaine Garden <DwaineGarden@rogers.com>"
  72 #define DRIVER_NAME "usbvision"
  73 #define DRIVER_ALIAS "USBVision"
  74 #define DRIVER_DESC "USBVision USB Video Device Driver for Linux"
  75 #define USBVISION_VERSION_STRING "0.9.11"
  76
  77 #define ENABLE_HEXDUMP  0       /* Enable if you need it */
  78
  79
  80 #ifdef USBVISION_DEBUG
  81         #define PDEBUG(level, fmt, args...) { \
  82                 if (video_debug & (level)) \
  83                         printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \
  84                                 __func__, __LINE__ , ## args); \
  85         }
  86 #else
  87         #define PDEBUG(level, fmt, args...) do {} while (0)
  88 #endif
  89
  90 #define DBG_IO          (1 << 1)
  91 #define DBG_PROBE       (1 << 2)
  92 #define DBG_MMAP        (1 << 3)
  93
  94 /* String operations */
  95 #define rmspace(str)    while (*str == ' ') str++;
  96 #define goto2next(str)  while (*str != ' ') str++; while (*str == ' ') str++;
  97
  98
  99 /* sequential number of usbvision device */
 100 static int usbvision_nr;
 101
 102 static struct usbvision_v4l2_format_st usbvision_v4l2_format[] = {
 103         { 1, 1,  8, V4L2_PIX_FMT_GREY    , "GREY" },
 104         { 1, 2, 16, V4L2_PIX_FMT_RGB565  , "RGB565" },
 105         { 1, 3, 24, V4L2_PIX_FMT_RGB24   , "RGB24" },
 106         { 1, 4, 32, V4L2_PIX_FMT_RGB32   , "RGB32" },
 107         { 1, 2, 16, V4L2_PIX_FMT_RGB555  , "RGB555" },
 108         { 1, 2, 16, V4L2_PIX_FMT_YUYV    , "YUV422" },
 109         { 1, 2, 12, V4L2_PIX_FMT_YVU420  , "YUV420P" }, /* 1.5 ! */
 110         { 1, 2, 16, V4L2_PIX_FMT_YUV422P , "YUV422P" }
 111 };
 112
 113 /* Function prototypes */
 114 static void usbvision_release(struct usb_usbvision *usbvision);
 115
 116 /* Default initialization of device driver parameters */
 117 /* Set the default format for ISOC endpoint */
 118 static int isoc_mode = ISOC_MODE_COMPRESS;
 119 /* Set the default Debug Mode of the device driver */
 120 static int video_debug;
 121 /* Sequential Number of Video Device */
 122 static int video_nr = -1;
 123 /* Sequential Number of Radio Device */
 124 static int radio_nr = -1;
 125
 126 /* Grab parameters for the device driver */
 127
 128 /* Showing parameters under SYSFS */
 129 module_param(isoc_mode, int, 0444);
 130 module_param(video_debug, int, 0444);
 131 module_param(video_nr, int, 0444);
 132 module_param(radio_nr, int, 0444);
 133
 134 MODULE_PARM_DESC(isoc_mode, " Set the default format for ISOC endpoint.  Default: 0x60 (Compression On)");
 135 MODULE_PARM_DESC(video_debug, " Set the default Debug Mode of the device driver.  Default: 0 (Off)");
 136 MODULE_PARM_DESC(video_nr, "Set video device number (/dev/videoX).  Default: -1 (autodetect)");
 137 MODULE_PARM_DESC(radio_nr, "Set radio device number (/dev/radioX).  Default: -1 (autodetect)");
 138
 139
 140 /* Misc stuff */
 141 MODULE_AUTHOR(DRIVER_AUTHOR);
 142 MODULE_DESCRIPTION(DRIVER_DESC);
 143 MODULE_LICENSE("GPL");
 144 MODULE_VERSION(USBVISION_VERSION_STRING);
 145 MODULE_ALIAS(DRIVER_ALIAS);
 146
 147
 148 /*****************************************************************************/
 149 /* SYSFS Code - Copied from the stv680.c usb module.                         */
 150 /* Device information is located at /sys/class/video4linux/video0            */
 151 /* Device parameters information is located at /sys/module/usbvision         */
 152 /* Device USB Information is located at                                      */
 153 /*   /sys/bus/usb/drivers/USBVision Video Grabber                            */
 154 /*****************************************************************************/
 155
 156 #define YES_NO(x) ((x) ? "Yes" : "No")
 157
 158 static inline struct usb_usbvision *cd_to_usbvision(struct device *cd)
 159 {
 160         struct video_device *vdev = to_video_device(cd);
 161         return video_get_drvdata(vdev);
 162 }
 163
 164 static ssize_t show_version(struct device *cd,
 165                             struct device_attribute *attr, char *buf)
 166 {
 167         return sprintf(buf, "%s\n", USBVISION_VERSION_STRING);
 168 }
 169 static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);
 170
 171 static ssize_t show_model(struct device *cd,
 172                           struct device_attribute *attr, char *buf)
 173 {
 174         struct video_device *vdev = to_video_device(cd);
 175         struct usb_usbvision *usbvision = video_get_drvdata(vdev);
 176         return sprintf(buf, "%s\n",
 177                        usbvision_device_data[usbvision->dev_model].model_string);
 178 }
 179 static DEVICE_ATTR(model, S_IRUGO, show_model, NULL);
 180
 181 static ssize_t show_hue(struct device *cd,
 182                         struct device_attribute *attr, char *buf)
 183 {
 184         struct video_device *vdev = to_video_device(cd);
 185         struct usb_usbvision *usbvision = video_get_drvdata(vdev);
 186         s32 val = v4l2_ctrl_g_ctrl(v4l2_ctrl_find(&usbvision->hdl,
 187                                                   V4L2_CID_HUE));
 188
 189         return sprintf(buf, "%d\n", val);
 190 }
 191 static DEVICE_ATTR(hue, S_IRUGO, show_hue, NULL);
 192
 193 static ssize_t show_contrast(struct device *cd,
 194                              struct device_attribute *attr, char *buf)
 195 {
 196         struct video_device *vdev = to_video_device(cd);
 197         struct usb_usbvision *usbvision = video_get_drvdata(vdev);
 198         s32 val = v4l2_ctrl_g_ctrl(v4l2_ctrl_find(&usbvision->hdl,
 199                                                   V4L2_CID_CONTRAST));
 200
 201         return sprintf(buf, "%d\n", val);
 202 }
 203 static DEVICE_ATTR(contrast, S_IRUGO, show_contrast, NULL);
 204
 205 static ssize_t show_brightness(struct device *cd,
 206                                struct device_attribute *attr, char *buf)
 207 {
 208         struct video_device *vdev = to_video_device(cd);
 209         struct usb_usbvision *usbvision = video_get_drvdata(vdev);
 210         s32 val = v4l2_ctrl_g_ctrl(v4l2_ctrl_find(&usbvision->hdl,
 211                                                   V4L2_CID_BRIGHTNESS));
 212
 213         return sprintf(buf, "%d\n", val);
 214 }
 215 static DEVICE_ATTR(brightness, S_IRUGO, show_brightness, NULL);
 216
 217 static ssize_t show_saturation(struct device *cd,
 218                                struct device_attribute *attr, char *buf)
 219 {
 220         struct video_device *vdev = to_video_device(cd);
 221         struct usb_usbvision *usbvision = video_get_drvdata(vdev);
 222         s32 val = v4l2_ctrl_g_ctrl(v4l2_ctrl_find(&usbvision->hdl,
 223                                                   V4L2_CID_SATURATION));
 224
 225         return sprintf(buf, "%d\n", val);
 226 }
 227 static DEVICE_ATTR(saturation, S_IRUGO, show_saturation, NULL);
 228
 229 static ssize_t show_streaming(struct device *cd,
 230                               struct device_attribute *attr, char *buf)
 231 {
 232         struct video_device *vdev = to_video_device(cd);
 233         struct usb_usbvision *usbvision = video_get_drvdata(vdev);
 234         return sprintf(buf, "%s\n",
 235                        YES_NO(usbvision->streaming == stream_on ? 1 : 0));
 236 }
 237 static DEVICE_ATTR(streaming, S_IRUGO, show_streaming, NULL);
 238
 239 static ssize_t show_compression(struct device *cd,
 240                                 struct device_attribute *attr, char *buf)
 241 {
 242         struct video_device *vdev = to_video_device(cd);
 243         struct usb_usbvision *usbvision = video_get_drvdata(vdev);
 244         return sprintf(buf, "%s\n",
 245                        YES_NO(usbvision->isoc_mode == ISOC_MODE_COMPRESS));
 246 }
 247 static DEVICE_ATTR(compression, S_IRUGO, show_compression, NULL);
 248
 249 static ssize_t show_device_bridge(struct device *cd,
 250                                   struct device_attribute *attr, char *buf)
 251 {
 252         struct video_device *vdev = to_video_device(cd);
 253         struct usb_usbvision *usbvision = video_get_drvdata(vdev);
 254         return sprintf(buf, "%d\n", usbvision->bridge_type);
 255 }
 256 static DEVICE_ATTR(bridge, S_IRUGO, show_device_bridge, NULL);
 257
 258 static void usbvision_create_sysfs(struct video_device *vdev)
 259 {
 260         int res;
 261
 262         if (!vdev)
 263                 return;
 264         do {
 265                 res = device_create_file(&vdev->dev, &dev_attr_version);
 266                 if (res < 0)
 267                         break;
 268                 res = device_create_file(&vdev->dev, &dev_attr_model);
 269                 if (res < 0)
 270                         break;
 271                 res = device_create_file(&vdev->dev, &dev_attr_hue);
 272                 if (res < 0)
 273                         break;
 274                 res = device_create_file(&vdev->dev, &dev_attr_contrast);
 275                 if (res < 0)
 276                         break;
 277                 res = device_create_file(&vdev->dev, &dev_attr_brightness);
 278                 if (res < 0)
 279                         break;
 280                 res = device_create_file(&vdev->dev, &dev_attr_saturation);
 281                 if (res < 0)
 282                         break;
 283                 res = device_create_file(&vdev->dev, &dev_attr_streaming);
 284                 if (res < 0)
 285                         break;
 286                 res = device_create_file(&vdev->dev, &dev_attr_compression);
 287                 if (res < 0)
 288                         break;
 289                 res = device_create_file(&vdev->dev, &dev_attr_bridge);
 290                 if (res >= 0)
 291                         return;
 292         } while (0);
 293
 294         dev_err(&vdev->dev, "%s error: %d\n", __func__, res);
 295 }
 296
 297 static void usbvision_remove_sysfs(struct video_device *vdev)
 298 {
 299         if (vdev) {
 300                 device_remove_file(&vdev->dev, &dev_attr_version);
 301                 device_remove_file(&vdev->dev, &dev_attr_model);
 302                 device_remove_file(&vdev->dev, &dev_attr_hue);
 303                 device_remove_file(&vdev->dev, &dev_attr_contrast);
 304                 device_remove_file(&vdev->dev, &dev_attr_brightness);
 305                 device_remove_file(&vdev->dev, &dev_attr_saturation);
 306                 device_remove_file(&vdev->dev, &dev_attr_streaming);
 307                 device_remove_file(&vdev->dev, &dev_attr_compression);
 308                 device_remove_file(&vdev->dev, &dev_attr_bridge);
 309         }
 310 }
 311
 312 /*
 313  * usbvision_open()
 314  *
 315  * This is part of Video 4 Linux API. The driver can be opened by one
 316  * client only (checks internal counter 'usbvision->user'). The procedure
 317  * then allocates buffers needed for video processing.
 318  *
 319  */
 320 static int usbvision_v4l2_open(struct file *file)
 321 {
 322         struct usb_usbvision *usbvision = video_drvdata(file);
 323         int err_code = 0;
 324
 325         PDEBUG(DBG_IO, "open");
 326
 327         if (mutex_lock_interruptible(&usbvision->v4l2_lock))
 328                 return -ERESTARTSYS;
 329
 330         if (usbvision->user) {
 331                 err_code = -EBUSY;
 332         } else {
 333                 err_code = v4l2_fh_open(file);
 334                 if (err_code)
 335                         goto unlock;
 336
 337                 /* Allocate memory for the scratch ring buffer */
 338                 err_code = usbvision_scratch_alloc(usbvision);
 339                 if (isoc_mode == ISOC_MODE_COMPRESS) {
 340                         /* Allocate intermediate decompression buffers
 341                            only if needed */
 342                         err_code = usbvision_decompress_alloc(usbvision);
 343                 }
 344                 if (err_code) {
 345                         /* Deallocate all buffers if trouble */
 346                         usbvision_scratch_free(usbvision);
 347                         usbvision_decompress_free(usbvision);
 348                 }
 349         }
 350
 351         /* If so far no errors then we shall start the camera */
 352         if (!err_code) {
 353                 /* Send init sequence only once, it's large! */
 354                 if (!usbvision->initialized) {
 355                         int setup_ok = 0;
 356                         setup_ok = usbvision_setup(usbvision, isoc_mode);
 357                         if (setup_ok)
 358                                 usbvision->initialized = 1;
 359                         else
 360                                 err_code = -EBUSY;
 361                 }
 362
 363                 if (!err_code) {
 364                         usbvision_begin_streaming(usbvision);
 365                         err_code = usbvision_init_isoc(usbvision);
 366                         /* device must be initialized before isoc transfer */
 367                         usbvision_muxsel(usbvision, 0);
 368
 369                         /* prepare queues */
 370                         usbvision_empty_framequeues(usbvision);
 371                         usbvision->user++;
 372                 }
 373         }
 374
 375 unlock:
 376         mutex_unlock(&usbvision->v4l2_lock);
 377
 378         PDEBUG(DBG_IO, "success");
 379         return err_code;
 380 }
 381
 382 /*
 383  * usbvision_v4l2_close()
 384  *
 385  * This is part of Video 4 Linux API. The procedure
 386  * stops streaming and deallocates all buffers that were earlier
 387  * allocated in usbvision_v4l2_open().
 388  *
 389  */
 390 static int usbvision_v4l2_close(struct file *file)
 391 {
 392         struct usb_usbvision *usbvision = video_drvdata(file);
 393
 394         PDEBUG(DBG_IO, "close");
 395
 396         mutex_lock(&usbvision->v4l2_lock);
 397         usbvision_audio_off(usbvision);
 398         usbvision_restart_isoc(usbvision);
 399         usbvision_stop_isoc(usbvision);
 400
 401         usbvision_decompress_free(usbvision);
 402         usbvision_frames_free(usbvision);
 403         usbvision_empty_framequeues(usbvision);
 404         usbvision_scratch_free(usbvision);
 405
 406         usbvision->user--;
 407         mutex_unlock(&usbvision->v4l2_lock);
 408
 409         if (usbvision->remove_pending) {
 410                 printk(KERN_INFO "%s: Final disconnect\n", __func__);
 411                 usbvision_release(usbvision);
 412                 return 0;
 413         }
 414
 415         PDEBUG(DBG_IO, "success");
 416         return v4l2_fh_release(file);
 417 }
 418
 419
 420 /*
 421  * usbvision_ioctl()
 422  *
 423  * This is part of Video 4 Linux API. The procedure handles ioctl() calls.
 424  *
 425  */
 426 #ifdef CONFIG_VIDEO_ADV_DEBUG
 427 static int vidioc_g_register(struct file *file, void *priv,
 428                                 struct v4l2_dbg_register *reg)
 429 {
 430         struct usb_usbvision *usbvision = video_drvdata(file);
 431         int err_code;
 432
 433         /* NT100x has a 8-bit register space */
 434         err_code = usbvision_read_reg(usbvision, reg->reg&0xff);
 435         if (err_code < 0) {
 436                 dev_err(&usbvision->vdev.dev,
 437                         "%s: VIDIOC_DBG_G_REGISTER failed: error %d\n",
 438                                 __func__, err_code);
 439                 return err_code;
 440         }
 441         reg->val = err_code;
 442         reg->size = 1;
 443         return 0;
 444 }
 445
 446 static int vidioc_s_register(struct file *file, void *priv,
 447                                 const struct v4l2_dbg_register *reg)
 448 {
 449         struct usb_usbvision *usbvision = video_drvdata(file);
 450         int err_code;
 451
 452         /* NT100x has a 8-bit register space */
 453         err_code = usbvision_write_reg(usbvision, reg->reg & 0xff, reg->val);
 454         if (err_code < 0) {
 455                 dev_err(&usbvision->vdev.dev,
 456                         "%s: VIDIOC_DBG_S_REGISTER failed: error %d\n",
 457                                 __func__, err_code);
 458                 return err_code;
 459         }
 460         return 0;
 461 }
 462 #endif
 463
 464 static int vidioc_querycap(struct file *file, void  *priv,
 465                                         struct v4l2_capability *vc)
 466 {
 467         struct usb_usbvision *usbvision = video_drvdata(file);
 468         struct video_device *vdev = video_devdata(file);
 469
 470         strlcpy(vc->driver, "USBVision", sizeof(vc->driver));
 471         strlcpy(vc->card,
 472                 usbvision_device_data[usbvision->dev_model].model_string,
 473                 sizeof(vc->card));
 474         usb_make_path(usbvision->dev, vc->bus_info, sizeof(vc->bus_info));
 475         vc->device_caps = usbvision->have_tuner ? V4L2_CAP_TUNER : 0;
 476         if (vdev->vfl_type == VFL_TYPE_GRABBER)
 477                 vc->device_caps |= V4L2_CAP_VIDEO_CAPTURE |
 478                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
 479         else
 480                 vc->device_caps |= V4L2_CAP_RADIO;
 481
 482         vc->capabilities = vc->device_caps | V4L2_CAP_VIDEO_CAPTURE |
 483                 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS;
 484         if (usbvision_device_data[usbvision->dev_model].radio)
 485                 vc->capabilities |= V4L2_CAP_RADIO;
 486         return 0;
 487 }
 488
 489 static int vidioc_enum_input(struct file *file, void *priv,
 490                                 struct v4l2_input *vi)
 491 {
 492         struct usb_usbvision *usbvision = video_drvdata(file);
 493         int chan;
 494
 495         if (vi->index >= usbvision->video_inputs)
 496                 return -EINVAL;
 497         if (usbvision->have_tuner)
 498                 chan = vi->index;
 499         else
 500                 chan = vi->index + 1; /* skip Television string*/
 501
 502         /* Determine the requested input characteristics
 503            specific for each usbvision card model */
 504         switch (chan) {
 505         case 0:
 506                 if (usbvision_device_data[usbvision->dev_model].video_channels == 4) {
 507                         strcpy(vi->name, "White Video Input");
 508                 } else {
 509                         strcpy(vi->name, "Television");
 510                         vi->type = V4L2_INPUT_TYPE_TUNER;
 511                         vi->tuner = chan;
 512                         vi->std = USBVISION_NORMS;
 513                 }
 514                 break;
 515         case 1:
 516                 vi->type = V4L2_INPUT_TYPE_CAMERA;
 517                 if (usbvision_device_data[usbvision->dev_model].video_channels == 4)
 518                         strcpy(vi->name, "Green Video Input");
 519                 else
 520                         strcpy(vi->name, "Composite Video Input");
 521                 vi->std = USBVISION_NORMS;
 522                 break;
 523         case 2:
 524                 vi->type = V4L2_INPUT_TYPE_CAMERA;
 525                 if (usbvision_device_data[usbvision->dev_model].video_channels == 4)
 526                         strcpy(vi->name, "Yellow Video Input");
 527                 else
 528                         strcpy(vi->name, "S-Video Input");
 529                 vi->std = USBVISION_NORMS;
 530                 break;
 531         case 3:
 532                 vi->type = V4L2_INPUT_TYPE_CAMERA;
 533                 strcpy(vi->name, "Red Video Input");
 534                 vi->std = USBVISION_NORMS;
 535                 break;
 536         }
 537         return 0;
 538 }
 539
 540 static int vidioc_g_input(struct file *file, void *priv, unsigned int *input)
 541 {
 542         struct usb_usbvision *usbvision = video_drvdata(file);
 543
 544         *input = usbvision->ctl_input;
 545         return 0;
 546 }
 547
 548 static int vidioc_s_input(struct file *file, void *priv, unsigned int input)
 549 {
 550         struct usb_usbvision *usbvision = video_drvdata(file);
 551
 552         if (input >= usbvision->video_inputs)
 553                 return -EINVAL;
 554
 555         usbvision_muxsel(usbvision, input);
 556         usbvision_set_input(usbvision);
 557         usbvision_set_output(usbvision,
 558                              usbvision->curwidth,
 559                              usbvision->curheight);
 560         return 0;
 561 }
 562
 563 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
 564 {
 565         struct usb_usbvision *usbvision = video_drvdata(file);
 566
 567         usbvision->tvnorm_id = id;
 568
 569         call_all(usbvision, video, s_std, usbvision->tvnorm_id);
 570         /* propagate the change to the decoder */
 571         usbvision_muxsel(usbvision, usbvision->ctl_input);
 572
 573         return 0;
 574 }
 575
 576 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id)
 577 {
 578         struct usb_usbvision *usbvision = video_drvdata(file);
 579
 580         *id = usbvision->tvnorm_id;
 581         return 0;
 582 }
 583
 584 static int vidioc_g_tuner(struct file *file, void *priv,
 585                                 struct v4l2_tuner *vt)
 586 {
 587         struct usb_usbvision *usbvision = video_drvdata(file);
 588
 589         if (vt->index)  /* Only tuner 0 */
 590                 return -EINVAL;
 591         if (vt->type == V4L2_TUNER_RADIO)
 592                 strcpy(vt->name, "Radio");
 593         else
 594                 strcpy(vt->name, "Television");
 595
 596         /* Let clients fill in the remainder of this struct */
 597         call_all(usbvision, tuner, g_tuner, vt);
 598
 599         return 0;
 600 }
 601
 602 static int vidioc_s_tuner(struct file *file, void *priv,
 603                                 const struct v4l2_tuner *vt)
 604 {
 605         struct usb_usbvision *usbvision = video_drvdata(file);
 606
 607         /* Only one tuner for now */
 608         if (vt->index)
 609                 return -EINVAL;
 610         /* let clients handle this */
 611         call_all(usbvision, tuner, s_tuner, vt);
 612
 613         return 0;
 614 }
 615
 616 static int vidioc_g_frequency(struct file *file, void *priv,
 617                                 struct v4l2_frequency *freq)
 618 {
 619         struct usb_usbvision *usbvision = video_drvdata(file);
 620
 621         /* Only one tuner */
 622         if (freq->tuner)
 623                 return -EINVAL;
 624         if (freq->type == V4L2_TUNER_RADIO)
 625                 freq->frequency = usbvision->radio_freq;
 626         else
 627                 freq->frequency = usbvision->tv_freq;
 628
 629         return 0;
 630 }
 631
 632 static int vidioc_s_frequency(struct file *file, void *priv,
 633                                 const struct v4l2_frequency *freq)
 634 {
 635         struct usb_usbvision *usbvision = video_drvdata(file);
 636         struct v4l2_frequency new_freq = *freq;
 637
 638         /* Only one tuner for now */
 639         if (freq->tuner)
 640                 return -EINVAL;
 641
 642         call_all(usbvision, tuner, s_frequency, freq);
 643         call_all(usbvision, tuner, g_frequency, &new_freq);
 644         if (freq->type == V4L2_TUNER_RADIO)
 645                 usbvision->radio_freq = new_freq.frequency;
 646         else
 647                 usbvision->tv_freq = new_freq.frequency;
 648
 649         return 0;
 650 }
 651
 652 static int vidioc_reqbufs(struct file *file,
 653                            void *priv, struct v4l2_requestbuffers *vr)
 654 {
 655         struct usb_usbvision *usbvision = video_drvdata(file);
 656         int ret;
 657
 658         RESTRICT_TO_RANGE(vr->count, 1, USBVISION_NUMFRAMES);
 659
 660         /* Check input validity:
 661            the user must do a VIDEO CAPTURE and MMAP method. */
 662         if (vr->memory != V4L2_MEMORY_MMAP)
 663                 return -EINVAL;
 664
 665         if (usbvision->streaming == stream_on) {
 666                 ret = usbvision_stream_interrupt(usbvision);
 667                 if (ret)
 668                         return ret;
 669         }
 670
 671         usbvision_frames_free(usbvision);
 672         usbvision_empty_framequeues(usbvision);
 673         vr->count = usbvision_frames_alloc(usbvision, vr->count);
 674
 675         usbvision->cur_frame = NULL;
 676
 677         return 0;
 678 }
 679
 680 static int vidioc_querybuf(struct file *file,
 681                             void *priv, struct v4l2_buffer *vb)
 682 {
 683         struct usb_usbvision *usbvision = video_drvdata(file);
 684         struct usbvision_frame *frame;
 685
 686         /* FIXME : must control
 687            that buffers are mapped (VIDIOC_REQBUFS has been called) */
 688         if (vb->index >= usbvision->num_frames)
 689                 return -EINVAL;
 690         /* Updating the corresponding frame state */
 691         vb->flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 692         frame = &usbvision->frame[vb->index];
 693         if (frame->grabstate >= frame_state_ready)
 694                 vb->flags |= V4L2_BUF_FLAG_QUEUED;
 695         if (frame->grabstate >= frame_state_done)
 696                 vb->flags |= V4L2_BUF_FLAG_DONE;
 697         if (frame->grabstate == frame_state_unused)
 698                 vb->flags |= V4L2_BUF_FLAG_MAPPED;
 699         vb->memory = V4L2_MEMORY_MMAP;
 700
 701         vb->m.offset = vb->index * PAGE_ALIGN(usbvision->max_frame_size);
 702
 703         vb->memory = V4L2_MEMORY_MMAP;
 704         vb->field = V4L2_FIELD_NONE;
 705         vb->length = usbvision->curwidth *
 706                 usbvision->curheight *
 707                 usbvision->palette.bytes_per_pixel;
 708         vb->timestamp = usbvision->frame[vb->index].timestamp;
 709         vb->sequence = usbvision->frame[vb->index].sequence;
 710         return 0;
 711 }
 712
 713 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *vb)
 714 {
 715         struct usb_usbvision *usbvision = video_drvdata(file);
 716         struct usbvision_frame *frame;
 717         unsigned long lock_flags;
 718
 719         /* FIXME : works only on VIDEO_CAPTURE MODE, MMAP. */
 720         if (vb->index >= usbvision->num_frames)
 721                 return -EINVAL;
 722
 723         frame = &usbvision->frame[vb->index];
 724
 725         if (frame->grabstate != frame_state_unused)
 726                 return -EAGAIN;
 727
 728         /* Mark it as ready and enqueue frame */
 729         frame->grabstate = frame_state_ready;
 730         frame->scanstate = scan_state_scanning;
 731         frame->scanlength = 0;  /* Accumulated in usbvision_parse_data() */
 732
 733         vb->flags &= ~V4L2_BUF_FLAG_DONE;
 734
 735         /* set v4l2_format index */
 736         frame->v4l2_format = usbvision->palette;
 737
 738         spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
 739         list_add_tail(&usbvision->frame[vb->index].frame, &usbvision->inqueue);
 740         spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
 741
 742         return 0;
 743 }
 744
 745 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *vb)
 746 {
 747         struct usb_usbvision *usbvision = video_drvdata(file);
 748         int ret;
 749         struct usbvision_frame *f;
 750         unsigned long lock_flags;
 751
 752         if (list_empty(&(usbvision->outqueue))) {
 753                 if (usbvision->streaming == stream_idle)
 754                         return -EINVAL;
 755                 ret = wait_event_interruptible
 756                         (usbvision->wait_frame,
 757                          !list_empty(&(usbvision->outqueue)));
 758                 if (ret)
 759                         return ret;
 760         }
 761
 762         spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
 763         f = list_entry(usbvision->outqueue.next,
 764                        struct usbvision_frame, frame);
 765         list_del(usbvision->outqueue.next);
 766         spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
 767
 768         f->grabstate = frame_state_unused;
 769
 770         vb->memory = V4L2_MEMORY_MMAP;
 771         vb->flags = V4L2_BUF_FLAG_MAPPED |
 772                 V4L2_BUF_FLAG_QUEUED |
 773                 V4L2_BUF_FLAG_DONE |
 774                 V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 775         vb->index = f->index;
 776         vb->sequence = f->sequence;
 777         vb->timestamp = f->timestamp;
 778         vb->field = V4L2_FIELD_NONE;
 779         vb->bytesused = f->scanlength;
 780
 781         return 0;
 782 }
 783
 784 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 785 {
 786         struct usb_usbvision *usbvision = video_drvdata(file);
 787
 788         usbvision->streaming = stream_on;
 789         call_all(usbvision, video, s_stream, 1);
 790
 791         return 0;
 792 }
 793
 794 static int vidioc_streamoff(struct file *file,
 795                             void *priv, enum v4l2_buf_type type)
 796 {
 797         struct usb_usbvision *usbvision = video_drvdata(file);
 798
 799         if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 800                 return -EINVAL;
 801
 802         if (usbvision->streaming == stream_on) {
 803                 usbvision_stream_interrupt(usbvision);
 804                 /* Stop all video streamings */
 805                 call_all(usbvision, video, s_stream, 0);
 806         }
 807         usbvision_empty_framequeues(usbvision);
 808
 809         return 0;
 810 }
 811
 812 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
 813                                         struct v4l2_fmtdesc *vfd)
 814 {
 815         if (vfd->index >= USBVISION_SUPPORTED_PALETTES - 1)
 816                 return -EINVAL;
 817         strcpy(vfd->description, usbvision_v4l2_format[vfd->index].desc);
 818         vfd->pixelformat = usbvision_v4l2_format[vfd->index].format;
 819         return 0;
 820 }
 821
 822 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
 823                                         struct v4l2_format *vf)
 824 {
 825         struct usb_usbvision *usbvision = video_drvdata(file);
 826         vf->fmt.pix.width = usbvision->curwidth;
 827         vf->fmt.pix.height = usbvision->curheight;
 828         vf->fmt.pix.pixelformat = usbvision->palette.format;
 829         vf->fmt.pix.bytesperline =
 830                 usbvision->curwidth * usbvision->palette.bytes_per_pixel;
 831         vf->fmt.pix.sizeimage = vf->fmt.pix.bytesperline * usbvision->curheight;
 832         vf->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 833         vf->fmt.pix.field = V4L2_FIELD_NONE; /* Always progressive image */
 834
 835         return 0;
 836 }
 837
 838 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 839                                struct v4l2_format *vf)
 840 {
 841         struct usb_usbvision *usbvision = video_drvdata(file);
 842         int format_idx;
 843
 844         /* Find requested format in available ones */
 845         for (format_idx = 0; format_idx < USBVISION_SUPPORTED_PALETTES; format_idx++) {
 846                 if (vf->fmt.pix.pixelformat ==
 847                    usbvision_v4l2_format[format_idx].format) {
 848                         usbvision->palette = usbvision_v4l2_format[format_idx];
 849                         break;
 850                 }
 851         }
 852         /* robustness */
 853         if (format_idx == USBVISION_SUPPORTED_PALETTES)
 854                 return -EINVAL;
 855         RESTRICT_TO_RANGE(vf->fmt.pix.width, MIN_FRAME_WIDTH, MAX_FRAME_WIDTH);
 856         RESTRICT_TO_RANGE(vf->fmt.pix.height, MIN_FRAME_HEIGHT, MAX_FRAME_HEIGHT);
 857
 858         vf->fmt.pix.bytesperline = vf->fmt.pix.width*
 859                 usbvision->palette.bytes_per_pixel;
 860         vf->fmt.pix.sizeimage = vf->fmt.pix.bytesperline*vf->fmt.pix.height;
 861         vf->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 862         vf->fmt.pix.field = V4L2_FIELD_NONE; /* Always progressive image */
 863
 864         return 0;
 865 }
 866
 867 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 868                                struct v4l2_format *vf)
 869 {
 870         struct usb_usbvision *usbvision = video_drvdata(file);
 871         int ret;
 872
 873         ret = vidioc_try_fmt_vid_cap(file, priv, vf);
 874         if (ret)
 875                 return ret;
 876
 877         /* stop io in case it is already in progress */
 878         if (usbvision->streaming == stream_on) {
 879                 ret = usbvision_stream_interrupt(usbvision);
 880                 if (ret)
 881                         return ret;
 882         }
 883         usbvision_frames_free(usbvision);
 884         usbvision_empty_framequeues(usbvision);
 885
 886         usbvision->cur_frame = NULL;
 887
 888         /* by now we are committed to the new data... */
 889         usbvision_set_output(usbvision, vf->fmt.pix.width, vf->fmt.pix.height);
 890
 891         return 0;
 892 }
 893
 894 static ssize_t usbvision_read(struct file *file, char __user *buf,
 895                       size_t count, loff_t *ppos)
 896 {
 897         struct usb_usbvision *usbvision = video_drvdata(file);
 898         int noblock = file->f_flags & O_NONBLOCK;
 899         unsigned long lock_flags;
 900         int ret, i;
 901         struct usbvision_frame *frame;
 902
 903         PDEBUG(DBG_IO, "%s: %ld bytes, noblock=%d", __func__,
 904                (unsigned long)count, noblock);
 905
 906         if (!USBVISION_IS_OPERATIONAL(usbvision) || !buf)
 907                 return -EFAULT;
 908
 909         /* This entry point is compatible with the mmap routines
 910            so that a user can do either VIDIOC_QBUF/VIDIOC_DQBUF
 911            to get frames or call read on the device. */
 912         if (!usbvision->num_frames) {
 913                 /* First, allocate some frames to work with
 914                    if this has not been done with VIDIOC_REQBUF */
 915                 usbvision_frames_free(usbvision);
 916                 usbvision_empty_framequeues(usbvision);
 917                 usbvision_frames_alloc(usbvision, USBVISION_NUMFRAMES);
 918         }
 919
 920         if (usbvision->streaming != stream_on) {
 921                 /* no stream is running, make it running ! */
 922                 usbvision->streaming = stream_on;
 923                 call_all(usbvision, video, s_stream, 1);
 924         }
 925
 926         /* Then, enqueue as many frames as possible
 927            (like a user of VIDIOC_QBUF would do) */
 928         for (i = 0; i < usbvision->num_frames; i++) {
 929                 frame = &usbvision->frame[i];
 930                 if (frame->grabstate == frame_state_unused) {
 931                         /* Mark it as ready and enqueue frame */
 932                         frame->grabstate = frame_state_ready;
 933                         frame->scanstate = scan_state_scanning;
 934                         /* Accumulated in usbvision_parse_data() */
 935                         frame->scanlength = 0;
 936
 937                         /* set v4l2_format index */
 938                         frame->v4l2_format = usbvision->palette;
 939
 940                         spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
 941                         list_add_tail(&frame->frame, &usbvision->inqueue);
 942                         spin_unlock_irqrestore(&usbvision->queue_lock,
 943                                                lock_flags);
 944                 }
 945         }
 946
 947         /* Then try to steal a frame (like a VIDIOC_DQBUF would do) */
 948         if (list_empty(&(usbvision->outqueue))) {
 949                 if (noblock)
 950                         return -EAGAIN;
 951
 952                 ret = wait_event_interruptible
 953                         (usbvision->wait_frame,
 954                          !list_empty(&(usbvision->outqueue)));
 955                 if (ret)
 956                         return ret;
 957         }
 958
 959         spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
 960         frame = list_entry(usbvision->outqueue.next,
 961                            struct usbvision_frame, frame);
 962         list_del(usbvision->outqueue.next);
 963         spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
 964
 965         /* An error returns an empty frame */
 966         if (frame->grabstate == frame_state_error) {
 967                 frame->bytes_read = 0;
 968                 return 0;
 969         }
 970
 971         PDEBUG(DBG_IO, "%s: frmx=%d, bytes_read=%ld, scanlength=%ld",
 972                __func__,
 973                frame->index, frame->bytes_read, frame->scanlength);
 974
 975         /* copy bytes to user space; we allow for partials reads */
 976         if ((count + frame->bytes_read) > (unsigned long)frame->scanlength)
 977                 count = frame->scanlength - frame->bytes_read;
 978
 979         if (copy_to_user(buf, frame->data + frame->bytes_read, count))
 980                 return -EFAULT;
 981
 982         frame->bytes_read += count;
 983         PDEBUG(DBG_IO, "%s: {copy} count used=%ld, new bytes_read=%ld",
 984                __func__,
 985                (unsigned long)count, frame->bytes_read);
 986
 987 #if 1
 988         /*
 989          * FIXME:
 990          * For now, forget the frame if it has not been read in one shot.
 991          */
 992         frame->bytes_read = 0;
 993
 994         /* Mark it as available to be used again. */
 995         frame->grabstate = frame_state_unused;
 996 #else
 997         if (frame->bytes_read >= frame->scanlength) {
 998                 /* All data has been read */
 999                 frame->bytes_read = 0;
1000
1001                 /* Mark it as available to be used again. */
1002                 frame->grabstate = frame_state_unused;
1003         }
1004 #endif
1005
1006         return count;
1007 }
1008
1009 static ssize_t usbvision_v4l2_read(struct file *file, char __user *buf,
1010                       size_t count, loff_t *ppos)
1011 {
1012         struct usb_usbvision *usbvision = video_drvdata(file);
1013         int res;
1014
1015         if (mutex_lock_interruptible(&usbvision->v4l2_lock))
1016                 return -ERESTARTSYS;
1017         res = usbvision_read(file, buf, count, ppos);
1018         mutex_unlock(&usbvision->v4l2_lock);
1019         return res;
1020 }
1021
1022 static int usbvision_mmap(struct file *file, struct vm_area_struct *vma)
1023 {
1024         unsigned long size = vma->vm_end - vma->vm_start,
1025                 start = vma->vm_start;
1026         void *pos;
1027         u32 i;
1028         struct usb_usbvision *usbvision = video_drvdata(file);
1029
1030         PDEBUG(DBG_MMAP, "mmap");
1031
1032         if (!USBVISION_IS_OPERATIONAL(usbvision))
1033                 return -EFAULT;
1034
1035         if (!(vma->vm_flags & VM_WRITE) ||
1036             size != PAGE_ALIGN(usbvision->max_frame_size)) {
1037                 return -EINVAL;
1038         }
1039
1040         for (i = 0; i < usbvision->num_frames; i++) {
1041                 if (((PAGE_ALIGN(usbvision->max_frame_size)*i) >> PAGE_SHIFT) ==
1042                     vma->vm_pgoff)
1043                         break;
1044         }
1045         if (i == usbvision->num_frames) {
1046                 PDEBUG(DBG_MMAP,
1047                        "mmap: user supplied mapping address is out of range");
1048                 return -EINVAL;
1049         }
1050
1051         /* VM_IO is eventually going to replace PageReserved altogether */
1052         vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
1053
1054         pos = usbvision->frame[i].data;
1055         while (size > 0) {
1056                 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1057                         PDEBUG(DBG_MMAP, "mmap: vm_insert_page failed");
1058                         return -EAGAIN;
1059                 }
1060                 start += PAGE_SIZE;
1061                 pos += PAGE_SIZE;
1062                 size -= PAGE_SIZE;
1063         }
1064
1065         return 0;
1066 }
1067
1068 static int usbvision_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
1069 {
1070         struct usb_usbvision *usbvision = video_drvdata(file);
1071         int res;
1072
1073         if (mutex_lock_interruptible(&usbvision->v4l2_lock))
1074                 return -ERESTARTSYS;
1075         res = usbvision_mmap(file, vma);
1076         mutex_unlock(&usbvision->v4l2_lock);
1077         return res;
1078 }
1079
1080 /*
1081  * Here comes the stuff for radio on usbvision based devices
1082  *
1083  */
1084 static int usbvision_radio_open(struct file *file)
1085 {
1086         struct usb_usbvision *usbvision = video_drvdata(file);
1087         int err_code = 0;
1088
1089         PDEBUG(DBG_IO, "%s:", __func__);
1090
1091         if (mutex_lock_interruptible(&usbvision->v4l2_lock))
1092                 return -ERESTARTSYS;
1093         err_code = v4l2_fh_open(file);
1094         if (err_code)
1095                 goto out;
1096         if (usbvision->user) {
1097                 dev_err(&usbvision->rdev.dev,
1098                         "%s: Someone tried to open an already opened USBVision Radio!\n",
1099                                 __func__);
1100                 err_code = -EBUSY;
1101         } else {
1102                 /* Alternate interface 1 is is the biggest frame size */
1103                 err_code = usbvision_set_alternate(usbvision);
1104                 if (err_code < 0) {
1105                         usbvision->last_error = err_code;
1106                         err_code = -EBUSY;
1107                         goto out;
1108                 }
1109
1110                 /* If so far no errors then we shall start the radio */
1111                 usbvision->radio = 1;
1112                 call_all(usbvision, tuner, s_radio);
1113                 usbvision_set_audio(usbvision, USBVISION_AUDIO_RADIO);
1114                 usbvision->user++;
1115         }
1116 out:
1117         mutex_unlock(&usbvision->v4l2_lock);
1118         return err_code;
1119 }
1120
1121
1122 static int usbvision_radio_close(struct file *file)
1123 {
1124         struct usb_usbvision *usbvision = video_drvdata(file);
1125
1126         PDEBUG(DBG_IO, "");
1127
1128         mutex_lock(&usbvision->v4l2_lock);
1129         /* Set packet size to 0 */
1130         usbvision->iface_alt = 0;
1131         usb_set_interface(usbvision->dev, usbvision->iface,
1132                                     usbvision->iface_alt);
1133
1134         usbvision_audio_off(usbvision);
1135         usbvision->radio = 0;
1136         usbvision->user--;
1137         mutex_unlock(&usbvision->v4l2_lock);
1138
1139         if (usbvision->remove_pending) {
1140                 printk(KERN_INFO "%s: Final disconnect\n", __func__);
1141                 v4l2_fh_release(file);
1142                 usbvision_release(usbvision);
1143                 return 0;
1144         }
1145
1146         PDEBUG(DBG_IO, "success");
1147         return v4l2_fh_release(file);
1148 }
1149
1150 /* Video registration stuff */
1151
1152 /* Video template */
1153 static const struct v4l2_file_operations usbvision_fops = {
1154         .owner             = THIS_MODULE,
1155         .open           = usbvision_v4l2_open,
1156         .release        = usbvision_v4l2_close,
1157         .read           = usbvision_v4l2_read,
1158         .mmap           = usbvision_v4l2_mmap,
1159         .unlocked_ioctl = video_ioctl2,
1160 };
1161
1162 static const struct v4l2_ioctl_ops usbvision_ioctl_ops = {
1163         .vidioc_querycap      = vidioc_querycap,
1164         .vidioc_enum_fmt_vid_cap  = vidioc_enum_fmt_vid_cap,
1165         .vidioc_g_fmt_vid_cap     = vidioc_g_fmt_vid_cap,
1166         .vidioc_try_fmt_vid_cap   = vidioc_try_fmt_vid_cap,
1167         .vidioc_s_fmt_vid_cap     = vidioc_s_fmt_vid_cap,
1168         .vidioc_reqbufs       = vidioc_reqbufs,
1169         .vidioc_querybuf      = vidioc_querybuf,
1170         .vidioc_qbuf          = vidioc_qbuf,
1171         .vidioc_dqbuf         = vidioc_dqbuf,
1172         .vidioc_s_std         = vidioc_s_std,
1173         .vidioc_g_std         = vidioc_g_std,
1174         .vidioc_enum_input    = vidioc_enum_input,
1175         .vidioc_g_input       = vidioc_g_input,
1176         .vidioc_s_input       = vidioc_s_input,
1177         .vidioc_streamon      = vidioc_streamon,
1178         .vidioc_streamoff     = vidioc_streamoff,
1179         .vidioc_g_tuner       = vidioc_g_tuner,
1180         .vidioc_s_tuner       = vidioc_s_tuner,
1181         .vidioc_g_frequency   = vidioc_g_frequency,
1182         .vidioc_s_frequency   = vidioc_s_frequency,
1183         .vidioc_log_status    = v4l2_ctrl_log_status,
1184         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1185         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1186 #ifdef CONFIG_VIDEO_ADV_DEBUG
1187         .vidioc_g_register    = vidioc_g_register,
1188         .vidioc_s_register    = vidioc_s_register,
1189 #endif
1190 };
1191
1192 static struct video_device usbvision_video_template = {
1193         .fops           = &usbvision_fops,
1194         .ioctl_ops      = &usbvision_ioctl_ops,
1195         .name           = "usbvision-video",
1196         .release        = video_device_release_empty,
1197         .tvnorms        = USBVISION_NORMS,
1198 };
1199
1200
1201 /* Radio template */
1202 static const struct v4l2_file_operations usbvision_radio_fops = {
1203         .owner             = THIS_MODULE,
1204         .open           = usbvision_radio_open,
1205         .release        = usbvision_radio_close,
1206         .poll           = v4l2_ctrl_poll,
1207         .unlocked_ioctl = video_ioctl2,
1208 };
1209
1210 static const struct v4l2_ioctl_ops usbvision_radio_ioctl_ops = {
1211         .vidioc_querycap      = vidioc_querycap,
1212         .vidioc_g_tuner       = vidioc_g_tuner,
1213         .vidioc_s_tuner       = vidioc_s_tuner,
1214         .vidioc_g_frequency   = vidioc_g_frequency,
1215         .vidioc_s_frequency   = vidioc_s_frequency,
1216         .vidioc_log_status    = v4l2_ctrl_log_status,
1217         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1218         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1219 };
1220
1221 static struct video_device usbvision_radio_template = {
1222         .fops           = &usbvision_radio_fops,
1223         .name           = "usbvision-radio",
1224         .release        = video_device_release_empty,
1225         .ioctl_ops      = &usbvision_radio_ioctl_ops,
1226 };
1227
1228
1229 static void usbvision_vdev_init(struct usb_usbvision *usbvision,
1230                                 struct video_device *vdev,
1231                                 const struct video_device *vdev_template,
1232                                 const char *name)
1233 {
1234         struct usb_device *usb_dev = usbvision->dev;
1235
1236         if (!usb_dev) {
1237                 dev_err(&usbvision->dev->dev,
1238                         "%s: usbvision->dev is not set\n", __func__);
1239                 return;
1240         }
1241
1242         *vdev = *vdev_template;
1243         vdev->lock = &usbvision->v4l2_lock;
1244         vdev->v4l2_dev = &usbvision->v4l2_dev;
1245         snprintf(vdev->name, sizeof(vdev->name), "%s", name);
1246         video_set_drvdata(vdev, usbvision);
1247 }
1248
1249 /* unregister video4linux devices */
1250 static void usbvision_unregister_video(struct usb_usbvision *usbvision)
1251 {
1252         /* Radio Device: */
1253         if (video_is_registered(&usbvision->rdev)) {
1254                 PDEBUG(DBG_PROBE, "unregister %s [v4l2]",
1255                        video_device_node_name(&usbvision->rdev));
1256                 video_unregister_device(&usbvision->rdev);
1257         }
1258
1259         /* Video Device: */
1260         if (video_is_registered(&usbvision->vdev)) {
1261                 PDEBUG(DBG_PROBE, "unregister %s [v4l2]",
1262                        video_device_node_name(&usbvision->vdev));
1263                 video_unregister_device(&usbvision->vdev);
1264         }
1265 }
1266
1267 /* register video4linux devices */
1268 static int usbvision_register_video(struct usb_usbvision *usbvision)
1269 {
1270         int res = -ENOMEM;
1271
1272         /* Video Device: */
1273         usbvision_vdev_init(usbvision, &usbvision->vdev,
1274                               &usbvision_video_template, "USBVision Video");
1275         if (!usbvision->have_tuner) {
1276                 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_G_FREQUENCY);
1277                 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_S_TUNER);
1278                 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_G_FREQUENCY);
1279                 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_S_TUNER);
1280         }
1281         if (video_register_device(&usbvision->vdev, VFL_TYPE_GRABBER, video_nr) < 0)
1282                 goto err_exit;
1283         printk(KERN_INFO "USBVision[%d]: registered USBVision Video device %s [v4l2]\n",
1284                usbvision->nr, video_device_node_name(&usbvision->vdev));
1285
1286         /* Radio Device: */
1287         if (usbvision_device_data[usbvision->dev_model].radio) {
1288                 /* usbvision has radio */
1289                 usbvision_vdev_init(usbvision, &usbvision->rdev,
1290                               &usbvision_radio_template, "USBVision Radio");
1291                 if (video_register_device(&usbvision->rdev, VFL_TYPE_RADIO, radio_nr) < 0)
1292                         goto err_exit;
1293                 printk(KERN_INFO "USBVision[%d]: registered USBVision Radio device %s [v4l2]\n",
1294                        usbvision->nr, video_device_node_name(&usbvision->rdev));
1295         }
1296         /* all done */
1297         return 0;
1298
1299  err_exit:
1300         dev_err(&usbvision->dev->dev,
1301                 "USBVision[%d]: video_register_device() failed\n",
1302                         usbvision->nr);
1303         usbvision_unregister_video(usbvision);
1304         return res;
1305 }
1306
1307 /*
1308  * usbvision_alloc()
1309  *
1310  * This code allocates the struct usb_usbvision.
1311  * It is filled with default values.
1312  *
1313  * Returns NULL on error, a pointer to usb_usbvision else.
1314  *
1315  */
1316 static struct usb_usbvision *usbvision_alloc(struct usb_device *dev,
1317                                              struct usb_interface *intf)
1318 {
1319         struct usb_usbvision *usbvision;
1320
1321         usbvision = kzalloc(sizeof(*usbvision), GFP_KERNEL);
1322         if (!usbvision)
1323                 return NULL;
1324
1325         usbvision->dev = dev;
1326         if (v4l2_device_register(&intf->dev, &usbvision->v4l2_dev))
1327                 goto err_free;
1328
1329         if (v4l2_ctrl_handler_init(&usbvision->hdl, 4))
1330                 goto err_unreg;
1331         usbvision->v4l2_dev.ctrl_handler = &usbvision->hdl;
1332         mutex_init(&usbvision->v4l2_lock);
1333
1334         /* prepare control urb for control messages during interrupts */
1335         usbvision->ctrl_urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
1336         if (!usbvision->ctrl_urb)
1337                 goto err_unreg;
1338
1339         return usbvision;
1340
1341 err_unreg:
1342         v4l2_ctrl_handler_free(&usbvision->hdl);
1343         v4l2_device_unregister(&usbvision->v4l2_dev);
1344 err_free:
1345         kfree(usbvision);
1346         return NULL;
1347 }
1348
1349 /*
1350  * usbvision_release()
1351  *
1352  * This code does final release of struct usb_usbvision. This happens
1353  * after the device is disconnected -and- all clients closed their files.
1354  *
1355  */
1356 static void usbvision_release(struct usb_usbvision *usbvision)
1357 {
1358         PDEBUG(DBG_PROBE, "");
1359
1360         usbvision->initialized = 0;
1361
1362         usbvision_remove_sysfs(&usbvision->vdev);
1363         usbvision_unregister_video(usbvision);
1364         kfree(usbvision->alt_max_pkt_size);
1365
1366         usb_free_urb(usbvision->ctrl_urb);
1367
1368         v4l2_ctrl_handler_free(&usbvision->hdl);
1369         v4l2_device_unregister(&usbvision->v4l2_dev);
1370         kfree(usbvision);
1371
1372         PDEBUG(DBG_PROBE, "success");
1373 }
1374
1375
1376 /*********************** usb interface **********************************/
1377
1378 static void usbvision_configure_video(struct usb_usbvision *usbvision)
1379 {
1380         int model;
1381
1382         if (!usbvision)
1383                 return;
1384
1385         model = usbvision->dev_model;
1386         usbvision->palette = usbvision_v4l2_format[2]; /* V4L2_PIX_FMT_RGB24; */
1387
1388         if (usbvision_device_data[usbvision->dev_model].vin_reg2_override) {
1389                 usbvision->vin_reg2_preset =
1390                         usbvision_device_data[usbvision->dev_model].vin_reg2;
1391         } else {
1392                 usbvision->vin_reg2_preset = 0;
1393         }
1394
1395         usbvision->tvnorm_id = usbvision_device_data[model].video_norm;
1396         usbvision->video_inputs = usbvision_device_data[model].video_channels;
1397         usbvision->ctl_input = 0;
1398         usbvision->radio_freq = 87.5 * 16000;
1399         usbvision->tv_freq = 400 * 16;
1400
1401         /* This should be here to make i2c clients to be able to register */
1402         /* first switch off audio */
1403         if (usbvision_device_data[model].audio_channels > 0)
1404                 usbvision_audio_off(usbvision);
1405         /* and then power up the tuner */
1406         usbvision_power_on(usbvision);
1407         usbvision_i2c_register(usbvision);
1408 }
1409
1410 /*
1411  * usbvision_probe()
1412  *
1413  * This procedure queries device descriptor and accepts the interface
1414  * if it looks like USBVISION video device
1415  *
1416  */
1417 static int usbvision_probe(struct usb_interface *intf,
1418                            const struct usb_device_id *devid)
1419 {
1420         struct usb_device *dev = usb_get_dev(interface_to_usbdev(intf));
1421         struct usb_interface *uif;
1422         __u8 ifnum = intf->altsetting->desc.bInterfaceNumber;
1423         const struct usb_host_interface *interface;
1424         struct usb_usbvision *usbvision = NULL;
1425         const struct usb_endpoint_descriptor *endpoint;
1426         int model, i, ret;
1427
1428         PDEBUG(DBG_PROBE, "VID=%#04x, PID=%#04x, ifnum=%u",
1429                                 le16_to_cpu(dev->descriptor.idVendor),
1430                                 le16_to_cpu(dev->descriptor.idProduct), ifnum);
1431
1432         model = devid->driver_info;
1433         if (model < 0 || model >= usbvision_device_data_size) {
1434                 PDEBUG(DBG_PROBE, "model out of bounds %d", model);
1435                 ret = -ENODEV;
1436                 goto err_usb;
1437         }
1438         printk(KERN_INFO "%s: %s found\n", __func__,
1439                                 usbvision_device_data[model].model_string);
1440
1441         if (usbvision_device_data[model].interface >= 0)
1442                 interface = &dev->actconfig->interface[usbvision_device_data[model].interface]->altsetting[0];
1443         else if (ifnum < dev->actconfig->desc.bNumInterfaces)
1444                 interface = &dev->actconfig->interface[ifnum]->altsetting[0];
1445         else {
1446                 dev_err(&intf->dev, "interface %d is invalid, max is %d\n",
1447                     ifnum, dev->actconfig->desc.bNumInterfaces - 1);
1448                 ret = -ENODEV;
1449                 goto err_usb;
1450         }
1451
1452         if (interface->desc.bNumEndpoints < 2) {
1453                 dev_err(&intf->dev, "interface %d has %d endpoints, but must have minimum 2\n",
1454                         ifnum, interface->desc.bNumEndpoints);
1455                 ret = -ENODEV;
1456                 goto err_usb;
1457         }
1458         endpoint = &interface->endpoint[1].desc;
1459
1460         if (!usb_endpoint_xfer_isoc(endpoint)) {
1461                 dev_err(&intf->dev, "%s: interface %d. has non-ISO endpoint!\n",
1462                     __func__, ifnum);
1463                 dev_err(&intf->dev, "%s: Endpoint attributes %d",
1464                     __func__, endpoint->bmAttributes);
1465                 ret = -ENODEV;
1466                 goto err_usb;
1467         }
1468         if (usb_endpoint_dir_out(endpoint)) {
1469                 dev_err(&intf->dev, "%s: interface %d. has ISO OUT endpoint!\n",
1470                     __func__, ifnum);
1471                 ret = -ENODEV;
1472                 goto err_usb;
1473         }
1474
1475         usbvision = usbvision_alloc(dev, intf);
1476         if (!usbvision) {
1477                 dev_err(&intf->dev, "%s: couldn't allocate USBVision struct\n", __func__);
1478                 ret = -ENOMEM;
1479                 goto err_usb;
1480         }
1481
1482         if (dev->descriptor.bNumConfigurations > 1)
1483                 usbvision->bridge_type = BRIDGE_NT1004;
1484         else if (model == DAZZLE_DVC_90_REV_1_SECAM)
1485                 usbvision->bridge_type = BRIDGE_NT1005;
1486         else
1487                 usbvision->bridge_type = BRIDGE_NT1003;
1488         PDEBUG(DBG_PROBE, "bridge_type %d", usbvision->bridge_type);
1489
1490         /* compute alternate max packet sizes */
1491         uif = dev->actconfig->interface[0];
1492
1493         usbvision->num_alt = uif->num_altsetting;
1494         PDEBUG(DBG_PROBE, "Alternate settings: %i", usbvision->num_alt);
1495         usbvision->alt_max_pkt_size = kmalloc_array(32, usbvision->num_alt,
1496                                                     GFP_KERNEL);
1497         if (!usbvision->alt_max_pkt_size) {
1498                 ret = -ENOMEM;
1499                 goto err_pkt;
1500         }
1501
1502         for (i = 0; i < usbvision->num_alt; i++) {
1503                 u16 tmp;
1504
1505                 if (uif->altsetting[i].desc.bNumEndpoints < 2) {
1506                         ret = -ENODEV;
1507                         goto err_pkt;
1508                 }
1509
1510                 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1511                                       wMaxPacketSize);
1512                 usbvision->alt_max_pkt_size[i] =
1513                         (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1514                 PDEBUG(DBG_PROBE, "Alternate setting %i, max size= %i", i,
1515                        usbvision->alt_max_pkt_size[i]);
1516         }
1517
1518
1519         usbvision->nr = usbvision_nr++;
1520
1521         spin_lock_init(&usbvision->queue_lock);
1522         init_waitqueue_head(&usbvision->wait_frame);
1523         init_waitqueue_head(&usbvision->wait_stream);
1524
1525         usbvision->have_tuner = usbvision_device_data[model].tuner;
1526         if (usbvision->have_tuner)
1527                 usbvision->tuner_type = usbvision_device_data[model].tuner_type;
1528
1529         usbvision->dev_model = model;
1530         usbvision->remove_pending = 0;
1531         usbvision->iface = ifnum;
1532         usbvision->iface_alt = 0;
1533         usbvision->video_endp = endpoint->bEndpointAddress;
1534         usbvision->isoc_packet_size = 0;
1535         usbvision->usb_bandwidth = 0;
1536         usbvision->user = 0;
1537         usbvision->streaming = stream_off;
1538         usbvision_configure_video(usbvision);
1539         usbvision_register_video(usbvision);
1540
1541         usbvision_create_sysfs(&usbvision->vdev);
1542
1543         PDEBUG(DBG_PROBE, "success");
1544         return 0;
1545
1546 err_pkt:
1547         usbvision_release(usbvision);
1548 err_usb:
1549         usb_put_dev(dev);
1550         return ret;
1551 }
1552
1553
1554 /*
1555  * usbvision_disconnect()
1556  *
1557  * This procedure stops all driver activity, deallocates interface-private
1558  * structure (pointed by 'ptr') and after that driver should be removable
1559  * with no ill consequences.
1560  *
1561  */
1562 static void usbvision_disconnect(struct usb_interface *intf)
1563 {
1564         struct usb_usbvision *usbvision = to_usbvision(usb_get_intfdata(intf));
1565
1566         PDEBUG(DBG_PROBE, "");
1567
1568         if (!usbvision) {
1569                 pr_err("%s: usb_get_intfdata() failed\n", __func__);
1570                 return;
1571         }
1572
1573         mutex_lock(&usbvision->v4l2_lock);
1574
1575         /* At this time we ask to cancel outstanding URBs */
1576         usbvision_stop_isoc(usbvision);
1577
1578         v4l2_device_disconnect(&usbvision->v4l2_dev);
1579         usbvision_i2c_unregister(usbvision);
1580         usbvision->remove_pending = 1;  /* Now all ISO data will be ignored */
1581
1582         usb_put_dev(usbvision->dev);
1583         usbvision->dev = NULL;  /* USB device is no more */
1584
1585         mutex_unlock(&usbvision->v4l2_lock);
1586
1587         if (usbvision->user) {
1588                 printk(KERN_INFO "%s: In use, disconnect pending\n",
1589                        __func__);
1590                 wake_up_interruptible(&usbvision->wait_frame);
1591                 wake_up_interruptible(&usbvision->wait_stream);
1592         } else {
1593                 usbvision_release(usbvision);
1594         }
1595
1596         PDEBUG(DBG_PROBE, "success");
1597 }
1598
1599 static struct usb_driver usbvision_driver = {
1600         .name           = "usbvision",
1601         .id_table       = usbvision_table,
1602         .probe          = usbvision_probe,
1603         .disconnect     = usbvision_disconnect,
1604 };
1605
1606 /*
1607  * usbvision_init()
1608  *
1609  * This code is run to initialize the driver.
1610  *
1611  */
1612 static int __init usbvision_init(void)
1613 {
1614         int err_code;
1615
1616         PDEBUG(DBG_PROBE, "");
1617
1618         PDEBUG(DBG_IO,  "IO      debugging is enabled [video]");
1619         PDEBUG(DBG_PROBE, "PROBE   debugging is enabled [video]");
1620         PDEBUG(DBG_MMAP, "MMAP    debugging is enabled [video]");
1621
1622         /* disable planar mode support unless compression enabled */
1623         if (isoc_mode != ISOC_MODE_COMPRESS) {
1624                 /* FIXME : not the right way to set supported flag */
1625                 usbvision_v4l2_format[6].supported = 0; /* V4L2_PIX_FMT_YVU420 */
1626                 usbvision_v4l2_format[7].supported = 0; /* V4L2_PIX_FMT_YUV422P */
1627         }
1628
1629         err_code = usb_register(&usbvision_driver);
1630
1631         if (err_code == 0) {
1632                 printk(KERN_INFO DRIVER_DESC " : " USBVISION_VERSION_STRING "\n");
1633                 PDEBUG(DBG_PROBE, "success");
1634         }
1635         return err_code;
1636 }
1637
1638 static void __exit usbvision_exit(void)
1639 {
1640         PDEBUG(DBG_PROBE, "");
1641
1642         usb_deregister(&usbvision_driver);
1643         PDEBUG(DBG_PROBE, "success");
1644 }
1645
1646 module_init(usbvision_init);
1647 module_exit(usbvision_exit);