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

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This source file includes following definitions.
cd_to_usbvision
show_version
show_model
show_hue
show_contrast
show_brightness
show_saturation
show_streaming
show_compression
show_device_bridge
usbvision_create_sysfs
usbvision_remove_sysfs
usbvision_v4l2_open
usbvision_v4l2_close
vidioc_g_register
vidioc_s_register
vidioc_querycap
vidioc_enum_input
vidioc_g_input
vidioc_s_input
vidioc_s_std
vidioc_g_std
vidioc_g_tuner
vidioc_s_tuner
vidioc_g_frequency
vidioc_s_frequency
vidioc_reqbufs
vidioc_querybuf
vidioc_qbuf
vidioc_dqbuf
vidioc_streamon
vidioc_streamoff
vidioc_enum_fmt_vid_cap
vidioc_g_fmt_vid_cap
vidioc_try_fmt_vid_cap
vidioc_s_fmt_vid_cap
usbvision_read
usbvision_v4l2_read
usbvision_mmap
usbvision_v4l2_mmap
usbvision_radio_open
usbvision_radio_close
usbvision_vdev_init
usbvision_unregister_video
usbvision_register_video
usbvision_alloc
usbvision_release
usbvision_configure_video
usbvision_probe
usbvision_disconnect
usbvision_init
usbvision_exit
   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 },
  91         { 1, 2, 16, V4L2_PIX_FMT_RGB565 },
  92         { 1, 3, 24, V4L2_PIX_FMT_RGB24 },
  93         { 1, 4, 32, V4L2_PIX_FMT_RGB32 },
  94         { 1, 2, 16, V4L2_PIX_FMT_RGB555 },
  95         { 1, 2, 16, V4L2_PIX_FMT_YUYV },
  96         { 1, 2, 12, V4L2_PIX_FMT_YVU420 }, /* 1.5 ! */
  97         { 1, 2, 16, V4L2_PIX_FMT_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->remove_pending) {
 318                 err_code = -ENODEV;
 319                 goto unlock;
 320         }
 321         if (usbvision->user) {
 322                 err_code = -EBUSY;
 323         } else {
 324                 err_code = v4l2_fh_open(file);
 325                 if (err_code)
 326                         goto unlock;
 327 
 328                 /* Allocate memory for the scratch ring buffer */
 329                 err_code = usbvision_scratch_alloc(usbvision);
 330                 if (isoc_mode == ISOC_MODE_COMPRESS) {
 331                         /* Allocate intermediate decompression buffers
 332                            only if needed */
 333                         err_code = usbvision_decompress_alloc(usbvision);
 334                 }
 335                 if (err_code) {
 336                         /* Deallocate all buffers if trouble */
 337                         usbvision_scratch_free(usbvision);
 338                         usbvision_decompress_free(usbvision);
 339                 }
 340         }
 341 
 342         /* If so far no errors then we shall start the camera */
 343         if (!err_code) {
 344                 /* Send init sequence only once, it's large! */
 345                 if (!usbvision->initialized) {
 346                         int setup_ok = 0;
 347                         setup_ok = usbvision_setup(usbvision, isoc_mode);
 348                         if (setup_ok)
 349                                 usbvision->initialized = 1;
 350                         else
 351                                 err_code = -EBUSY;
 352                 }
 353 
 354                 if (!err_code) {
 355                         usbvision_begin_streaming(usbvision);
 356                         err_code = usbvision_init_isoc(usbvision);
 357                         /* device must be initialized before isoc transfer */
 358                         usbvision_muxsel(usbvision, 0);
 359 
 360                         /* prepare queues */
 361                         usbvision_empty_framequeues(usbvision);
 362                         usbvision->user++;
 363                 }
 364         }
 365 
 366 unlock:
 367         mutex_unlock(&usbvision->v4l2_lock);
 368 
 369         PDEBUG(DBG_IO, "success");
 370         return err_code;
 371 }
 372 
 373 /*
 374  * usbvision_v4l2_close()
 375  *
 376  * This is part of Video 4 Linux API. The procedure
 377  * stops streaming and deallocates all buffers that were earlier
 378  * allocated in usbvision_v4l2_open().
 379  *
 380  */
 381 static int usbvision_v4l2_close(struct file *file)
 382 {
 383         struct usb_usbvision *usbvision = video_drvdata(file);
 384         int r;
 385 
 386         PDEBUG(DBG_IO, "close");
 387 
 388         mutex_lock(&usbvision->v4l2_lock);
 389         usbvision_audio_off(usbvision);
 390         usbvision_restart_isoc(usbvision);
 391         usbvision_stop_isoc(usbvision);
 392 
 393         usbvision_decompress_free(usbvision);
 394         usbvision_frames_free(usbvision);
 395         usbvision_empty_framequeues(usbvision);
 396         usbvision_scratch_free(usbvision);
 397 
 398         usbvision->user--;
 399         r = usbvision->remove_pending;
 400         mutex_unlock(&usbvision->v4l2_lock);
 401 
 402         if (r) {
 403                 printk(KERN_INFO "%s: Final disconnect\n", __func__);
 404                 usbvision_release(usbvision);
 405                 return 0;
 406         }
 407 
 408         PDEBUG(DBG_IO, "success");
 409         return v4l2_fh_release(file);
 410 }
 411 
 412 
 413 /*
 414  * usbvision_ioctl()
 415  *
 416  * This is part of Video 4 Linux API. The procedure handles ioctl() calls.
 417  *
 418  */
 419 #ifdef CONFIG_VIDEO_ADV_DEBUG
 420 static int vidioc_g_register(struct file *file, void *priv,
 421                                 struct v4l2_dbg_register *reg)
 422 {
 423         struct usb_usbvision *usbvision = video_drvdata(file);
 424         int err_code;
 425 
 426         /* NT100x has a 8-bit register space */
 427         err_code = usbvision_read_reg(usbvision, reg->reg&0xff);
 428         if (err_code < 0) {
 429                 dev_err(&usbvision->vdev.dev,
 430                         "%s: VIDIOC_DBG_G_REGISTER failed: error %d\n",
 431                                 __func__, err_code);
 432                 return err_code;
 433         }
 434         reg->val = err_code;
 435         reg->size = 1;
 436         return 0;
 437 }
 438 
 439 static int vidioc_s_register(struct file *file, void *priv,
 440                                 const struct v4l2_dbg_register *reg)
 441 {
 442         struct usb_usbvision *usbvision = video_drvdata(file);
 443         int err_code;
 444 
 445         /* NT100x has a 8-bit register space */
 446         err_code = usbvision_write_reg(usbvision, reg->reg & 0xff, reg->val);
 447         if (err_code < 0) {
 448                 dev_err(&usbvision->vdev.dev,
 449                         "%s: VIDIOC_DBG_S_REGISTER failed: error %d\n",
 450                                 __func__, err_code);
 451                 return err_code;
 452         }
 453         return 0;
 454 }
 455 #endif
 456 
 457 static int vidioc_querycap(struct file *file, void  *priv,
 458                                         struct v4l2_capability *vc)
 459 {
 460         struct usb_usbvision *usbvision = video_drvdata(file);
 461 
 462         if (!usbvision->dev)
 463                 return -ENODEV;
 464 
 465         strscpy(vc->driver, "USBVision", sizeof(vc->driver));
 466         strscpy(vc->card,
 467                 usbvision_device_data[usbvision->dev_model].model_string,
 468                 sizeof(vc->card));
 469         usb_make_path(usbvision->dev, vc->bus_info, sizeof(vc->bus_info));
 470         vc->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
 471                            V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS;
 472         if (usbvision_device_data[usbvision->dev_model].radio)
 473                 vc->capabilities |= V4L2_CAP_RADIO;
 474         if (usbvision->have_tuner)
 475                 vc->capabilities |= V4L2_CAP_TUNER;
 476         return 0;
 477 }
 478 
 479 static int vidioc_enum_input(struct file *file, void *priv,
 480                                 struct v4l2_input *vi)
 481 {
 482         struct usb_usbvision *usbvision = video_drvdata(file);
 483         int chan;
 484 
 485         if (vi->index >= usbvision->video_inputs)
 486                 return -EINVAL;
 487         if (usbvision->have_tuner)
 488                 chan = vi->index;
 489         else
 490                 chan = vi->index + 1; /* skip Television string*/
 491 
 492         /* Determine the requested input characteristics
 493            specific for each usbvision card model */
 494         switch (chan) {
 495         case 0:
 496                 if (usbvision_device_data[usbvision->dev_model].video_channels == 4) {
 497                         strscpy(vi->name, "White Video Input", sizeof(vi->name));
 498                 } else {
 499                         strscpy(vi->name, "Television", sizeof(vi->name));
 500                         vi->type = V4L2_INPUT_TYPE_TUNER;
 501                         vi->tuner = chan;
 502                         vi->std = USBVISION_NORMS;
 503                 }
 504                 break;
 505         case 1:
 506                 vi->type = V4L2_INPUT_TYPE_CAMERA;
 507                 if (usbvision_device_data[usbvision->dev_model].video_channels == 4)
 508                         strscpy(vi->name, "Green Video Input", sizeof(vi->name));
 509                 else
 510                         strscpy(vi->name, "Composite Video Input",
 511                                 sizeof(vi->name));
 512                 vi->std = USBVISION_NORMS;
 513                 break;
 514         case 2:
 515                 vi->type = V4L2_INPUT_TYPE_CAMERA;
 516                 if (usbvision_device_data[usbvision->dev_model].video_channels == 4)
 517                         strscpy(vi->name, "Yellow Video Input", sizeof(vi->name));
 518                 else
 519                         strscpy(vi->name, "S-Video Input", sizeof(vi->name));
 520                 vi->std = USBVISION_NORMS;
 521                 break;
 522         case 3:
 523                 vi->type = V4L2_INPUT_TYPE_CAMERA;
 524                 strscpy(vi->name, "Red Video Input", sizeof(vi->name));
 525                 vi->std = USBVISION_NORMS;
 526                 break;
 527         }
 528         return 0;
 529 }
 530 
 531 static int vidioc_g_input(struct file *file, void *priv, unsigned int *input)
 532 {
 533         struct usb_usbvision *usbvision = video_drvdata(file);
 534 
 535         *input = usbvision->ctl_input;
 536         return 0;
 537 }
 538 
 539 static int vidioc_s_input(struct file *file, void *priv, unsigned int input)
 540 {
 541         struct usb_usbvision *usbvision = video_drvdata(file);
 542 
 543         if (input >= usbvision->video_inputs)
 544                 return -EINVAL;
 545 
 546         usbvision_muxsel(usbvision, input);
 547         usbvision_set_input(usbvision);
 548         usbvision_set_output(usbvision,
 549                              usbvision->curwidth,
 550                              usbvision->curheight);
 551         return 0;
 552 }
 553 
 554 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
 555 {
 556         struct usb_usbvision *usbvision = video_drvdata(file);
 557 
 558         usbvision->tvnorm_id = id;
 559 
 560         call_all(usbvision, video, s_std, usbvision->tvnorm_id);
 561         /* propagate the change to the decoder */
 562         usbvision_muxsel(usbvision, usbvision->ctl_input);
 563 
 564         return 0;
 565 }
 566 
 567 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id)
 568 {
 569         struct usb_usbvision *usbvision = video_drvdata(file);
 570 
 571         *id = usbvision->tvnorm_id;
 572         return 0;
 573 }
 574 
 575 static int vidioc_g_tuner(struct file *file, void *priv,
 576                                 struct v4l2_tuner *vt)
 577 {
 578         struct usb_usbvision *usbvision = video_drvdata(file);
 579 
 580         if (vt->index)  /* Only tuner 0 */
 581                 return -EINVAL;
 582         if (vt->type == V4L2_TUNER_RADIO)
 583                 strscpy(vt->name, "Radio", sizeof(vt->name));
 584         else
 585                 strscpy(vt->name, "Television", sizeof(vt->name));
 586 
 587         /* Let clients fill in the remainder of this struct */
 588         call_all(usbvision, tuner, g_tuner, vt);
 589 
 590         return 0;
 591 }
 592 
 593 static int vidioc_s_tuner(struct file *file, void *priv,
 594                                 const struct v4l2_tuner *vt)
 595 {
 596         struct usb_usbvision *usbvision = video_drvdata(file);
 597 
 598         /* Only one tuner for now */
 599         if (vt->index)
 600                 return -EINVAL;
 601         /* let clients handle this */
 602         call_all(usbvision, tuner, s_tuner, vt);
 603 
 604         return 0;
 605 }
 606 
 607 static int vidioc_g_frequency(struct file *file, void *priv,
 608                                 struct v4l2_frequency *freq)
 609 {
 610         struct usb_usbvision *usbvision = video_drvdata(file);
 611 
 612         /* Only one tuner */
 613         if (freq->tuner)
 614                 return -EINVAL;
 615         if (freq->type == V4L2_TUNER_RADIO)
 616                 freq->frequency = usbvision->radio_freq;
 617         else
 618                 freq->frequency = usbvision->tv_freq;
 619 
 620         return 0;
 621 }
 622 
 623 static int vidioc_s_frequency(struct file *file, void *priv,
 624                                 const struct v4l2_frequency *freq)
 625 {
 626         struct usb_usbvision *usbvision = video_drvdata(file);
 627         struct v4l2_frequency new_freq = *freq;
 628 
 629         /* Only one tuner for now */
 630         if (freq->tuner)
 631                 return -EINVAL;
 632 
 633         call_all(usbvision, tuner, s_frequency, freq);
 634         call_all(usbvision, tuner, g_frequency, &new_freq);
 635         if (freq->type == V4L2_TUNER_RADIO)
 636                 usbvision->radio_freq = new_freq.frequency;
 637         else
 638                 usbvision->tv_freq = new_freq.frequency;
 639 
 640         return 0;
 641 }
 642 
 643 static int vidioc_reqbufs(struct file *file,
 644                            void *priv, struct v4l2_requestbuffers *vr)
 645 {
 646         struct usb_usbvision *usbvision = video_drvdata(file);
 647         int ret;
 648 
 649         RESTRICT_TO_RANGE(vr->count, 1, USBVISION_NUMFRAMES);
 650 
 651         /* Check input validity:
 652            the user must do a VIDEO CAPTURE and MMAP method. */
 653         if (vr->memory != V4L2_MEMORY_MMAP)
 654                 return -EINVAL;
 655 
 656         if (usbvision->streaming == stream_on) {
 657                 ret = usbvision_stream_interrupt(usbvision);
 658                 if (ret)
 659                         return ret;
 660         }
 661 
 662         usbvision_frames_free(usbvision);
 663         usbvision_empty_framequeues(usbvision);
 664         vr->count = usbvision_frames_alloc(usbvision, vr->count);
 665 
 666         usbvision->cur_frame = NULL;
 667 
 668         return 0;
 669 }
 670 
 671 static int vidioc_querybuf(struct file *file,
 672                             void *priv, struct v4l2_buffer *vb)
 673 {
 674         struct usb_usbvision *usbvision = video_drvdata(file);
 675         struct usbvision_frame *frame;
 676 
 677         /* FIXME : must control
 678            that buffers are mapped (VIDIOC_REQBUFS has been called) */
 679         if (vb->index >= usbvision->num_frames)
 680                 return -EINVAL;
 681         /* Updating the corresponding frame state */
 682         vb->flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 683         frame = &usbvision->frame[vb->index];
 684         if (frame->grabstate >= frame_state_ready)
 685                 vb->flags |= V4L2_BUF_FLAG_QUEUED;
 686         if (frame->grabstate >= frame_state_done)
 687                 vb->flags |= V4L2_BUF_FLAG_DONE;
 688         if (frame->grabstate == frame_state_unused)
 689                 vb->flags |= V4L2_BUF_FLAG_MAPPED;
 690         vb->memory = V4L2_MEMORY_MMAP;
 691 
 692         vb->m.offset = vb->index * PAGE_ALIGN(usbvision->max_frame_size);
 693 
 694         vb->memory = V4L2_MEMORY_MMAP;
 695         vb->field = V4L2_FIELD_NONE;
 696         vb->length = usbvision->curwidth *
 697                 usbvision->curheight *
 698                 usbvision->palette.bytes_per_pixel;
 699         vb->timestamp = ns_to_timeval(usbvision->frame[vb->index].ts);
 700         vb->sequence = usbvision->frame[vb->index].sequence;
 701         return 0;
 702 }
 703 
 704 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *vb)
 705 {
 706         struct usb_usbvision *usbvision = video_drvdata(file);
 707         struct usbvision_frame *frame;
 708         unsigned long lock_flags;
 709 
 710         /* FIXME : works only on VIDEO_CAPTURE MODE, MMAP. */
 711         if (vb->index >= usbvision->num_frames)
 712                 return -EINVAL;
 713 
 714         frame = &usbvision->frame[vb->index];
 715 
 716         if (frame->grabstate != frame_state_unused)
 717                 return -EAGAIN;
 718 
 719         /* Mark it as ready and enqueue frame */
 720         frame->grabstate = frame_state_ready;
 721         frame->scanstate = scan_state_scanning;
 722         frame->scanlength = 0;  /* Accumulated in usbvision_parse_data() */
 723 
 724         vb->flags &= ~V4L2_BUF_FLAG_DONE;
 725 
 726         /* set v4l2_format index */
 727         frame->v4l2_format = usbvision->palette;
 728 
 729         spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
 730         list_add_tail(&usbvision->frame[vb->index].frame, &usbvision->inqueue);
 731         spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
 732 
 733         return 0;
 734 }
 735 
 736 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *vb)
 737 {
 738         struct usb_usbvision *usbvision = video_drvdata(file);
 739         int ret;
 740         struct usbvision_frame *f;
 741         unsigned long lock_flags;
 742 
 743         if (list_empty(&(usbvision->outqueue))) {
 744                 if (usbvision->streaming == stream_idle)
 745                         return -EINVAL;
 746                 ret = wait_event_interruptible
 747                         (usbvision->wait_frame,
 748                          !list_empty(&(usbvision->outqueue)));
 749                 if (ret)
 750                         return ret;
 751         }
 752 
 753         spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
 754         f = list_entry(usbvision->outqueue.next,
 755                        struct usbvision_frame, frame);
 756         list_del(usbvision->outqueue.next);
 757         spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
 758 
 759         f->grabstate = frame_state_unused;
 760 
 761         vb->memory = V4L2_MEMORY_MMAP;
 762         vb->flags = V4L2_BUF_FLAG_MAPPED |
 763                 V4L2_BUF_FLAG_QUEUED |
 764                 V4L2_BUF_FLAG_DONE |
 765                 V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 766         vb->index = f->index;
 767         vb->sequence = f->sequence;
 768         vb->timestamp = ns_to_timeval(f->ts);
 769         vb->field = V4L2_FIELD_NONE;
 770         vb->bytesused = f->scanlength;
 771 
 772         return 0;
 773 }
 774 
 775 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 776 {
 777         struct usb_usbvision *usbvision = video_drvdata(file);
 778 
 779         usbvision->streaming = stream_on;
 780         call_all(usbvision, video, s_stream, 1);
 781 
 782         return 0;
 783 }
 784 
 785 static int vidioc_streamoff(struct file *file,
 786                             void *priv, enum v4l2_buf_type type)
 787 {
 788         struct usb_usbvision *usbvision = video_drvdata(file);
 789 
 790         if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 791                 return -EINVAL;
 792 
 793         if (usbvision->streaming == stream_on) {
 794                 usbvision_stream_interrupt(usbvision);
 795                 /* Stop all video streamings */
 796                 call_all(usbvision, video, s_stream, 0);
 797         }
 798         usbvision_empty_framequeues(usbvision);
 799 
 800         return 0;
 801 }
 802 
 803 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
 804                                         struct v4l2_fmtdesc *vfd)
 805 {
 806         if (vfd->index >= USBVISION_SUPPORTED_PALETTES - 1)
 807                 return -EINVAL;
 808         vfd->pixelformat = usbvision_v4l2_format[vfd->index].format;
 809         return 0;
 810 }
 811 
 812 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
 813                                         struct v4l2_format *vf)
 814 {
 815         struct usb_usbvision *usbvision = video_drvdata(file);
 816         vf->fmt.pix.width = usbvision->curwidth;
 817         vf->fmt.pix.height = usbvision->curheight;
 818         vf->fmt.pix.pixelformat = usbvision->palette.format;
 819         vf->fmt.pix.bytesperline =
 820                 usbvision->curwidth * usbvision->palette.bytes_per_pixel;
 821         vf->fmt.pix.sizeimage = vf->fmt.pix.bytesperline * usbvision->curheight;
 822         vf->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 823         vf->fmt.pix.field = V4L2_FIELD_NONE; /* Always progressive image */
 824 
 825         return 0;
 826 }
 827 
 828 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 829                                struct v4l2_format *vf)
 830 {
 831         struct usb_usbvision *usbvision = video_drvdata(file);
 832         int format_idx;
 833 
 834         /* Find requested format in available ones */
 835         for (format_idx = 0; format_idx < USBVISION_SUPPORTED_PALETTES; format_idx++) {
 836                 if (vf->fmt.pix.pixelformat ==
 837                    usbvision_v4l2_format[format_idx].format) {
 838                         usbvision->palette = usbvision_v4l2_format[format_idx];
 839                         break;
 840                 }
 841         }
 842         /* robustness */
 843         if (format_idx == USBVISION_SUPPORTED_PALETTES)
 844                 return -EINVAL;
 845         RESTRICT_TO_RANGE(vf->fmt.pix.width, MIN_FRAME_WIDTH, MAX_FRAME_WIDTH);
 846         RESTRICT_TO_RANGE(vf->fmt.pix.height, MIN_FRAME_HEIGHT, MAX_FRAME_HEIGHT);
 847 
 848         vf->fmt.pix.bytesperline = vf->fmt.pix.width*
 849                 usbvision->palette.bytes_per_pixel;
 850         vf->fmt.pix.sizeimage = vf->fmt.pix.bytesperline*vf->fmt.pix.height;
 851         vf->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 852         vf->fmt.pix.field = V4L2_FIELD_NONE; /* Always progressive image */
 853 
 854         return 0;
 855 }
 856 
 857 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 858                                struct v4l2_format *vf)
 859 {
 860         struct usb_usbvision *usbvision = video_drvdata(file);
 861         int ret;
 862 
 863         ret = vidioc_try_fmt_vid_cap(file, priv, vf);
 864         if (ret)
 865                 return ret;
 866 
 867         /* stop io in case it is already in progress */
 868         if (usbvision->streaming == stream_on) {
 869                 ret = usbvision_stream_interrupt(usbvision);
 870                 if (ret)
 871                         return ret;
 872         }
 873         usbvision_frames_free(usbvision);
 874         usbvision_empty_framequeues(usbvision);
 875 
 876         usbvision->cur_frame = NULL;
 877 
 878         /* by now we are committed to the new data... */
 879         usbvision_set_output(usbvision, vf->fmt.pix.width, vf->fmt.pix.height);
 880 
 881         return 0;
 882 }
 883 
 884 static ssize_t usbvision_read(struct file *file, char __user *buf,
 885                       size_t count, loff_t *ppos)
 886 {
 887         struct usb_usbvision *usbvision = video_drvdata(file);
 888         int noblock = file->f_flags & O_NONBLOCK;
 889         unsigned long lock_flags;
 890         int ret, i;
 891         struct usbvision_frame *frame;
 892 
 893         PDEBUG(DBG_IO, "%s: %ld bytes, noblock=%d", __func__,
 894                (unsigned long)count, noblock);
 895 
 896         if (!USBVISION_IS_OPERATIONAL(usbvision) || !buf)
 897                 return -EFAULT;
 898 
 899         /* This entry point is compatible with the mmap routines
 900            so that a user can do either VIDIOC_QBUF/VIDIOC_DQBUF
 901            to get frames or call read on the device. */
 902         if (!usbvision->num_frames) {
 903                 /* First, allocate some frames to work with
 904                    if this has not been done with VIDIOC_REQBUF */
 905                 usbvision_frames_free(usbvision);
 906                 usbvision_empty_framequeues(usbvision);
 907                 usbvision_frames_alloc(usbvision, USBVISION_NUMFRAMES);
 908         }
 909 
 910         if (usbvision->streaming != stream_on) {
 911                 /* no stream is running, make it running ! */
 912                 usbvision->streaming = stream_on;
 913                 call_all(usbvision, video, s_stream, 1);
 914         }
 915 
 916         /* Then, enqueue as many frames as possible
 917            (like a user of VIDIOC_QBUF would do) */
 918         for (i = 0; i < usbvision->num_frames; i++) {
 919                 frame = &usbvision->frame[i];
 920                 if (frame->grabstate == frame_state_unused) {
 921                         /* Mark it as ready and enqueue frame */
 922                         frame->grabstate = frame_state_ready;
 923                         frame->scanstate = scan_state_scanning;
 924                         /* Accumulated in usbvision_parse_data() */
 925                         frame->scanlength = 0;
 926 
 927                         /* set v4l2_format index */
 928                         frame->v4l2_format = usbvision->palette;
 929 
 930                         spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
 931                         list_add_tail(&frame->frame, &usbvision->inqueue);
 932                         spin_unlock_irqrestore(&usbvision->queue_lock,
 933                                                lock_flags);
 934                 }
 935         }
 936 
 937         /* Then try to steal a frame (like a VIDIOC_DQBUF would do) */
 938         if (list_empty(&(usbvision->outqueue))) {
 939                 if (noblock)
 940                         return -EAGAIN;
 941 
 942                 ret = wait_event_interruptible
 943                         (usbvision->wait_frame,
 944                          !list_empty(&(usbvision->outqueue)));
 945                 if (ret)
 946                         return ret;
 947         }
 948 
 949         spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
 950         frame = list_entry(usbvision->outqueue.next,
 951                            struct usbvision_frame, frame);
 952         list_del(usbvision->outqueue.next);
 953         spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
 954 
 955         /* An error returns an empty frame */
 956         if (frame->grabstate == frame_state_error) {
 957                 frame->bytes_read = 0;
 958                 return 0;
 959         }
 960 
 961         PDEBUG(DBG_IO, "%s: frmx=%d, bytes_read=%ld, scanlength=%ld",
 962                __func__,
 963                frame->index, frame->bytes_read, frame->scanlength);
 964 
 965         /* copy bytes to user space; we allow for partials reads */
 966         if ((count + frame->bytes_read) > (unsigned long)frame->scanlength)
 967                 count = frame->scanlength - frame->bytes_read;
 968 
 969         if (copy_to_user(buf, frame->data + frame->bytes_read, count))
 970                 return -EFAULT;
 971 
 972         frame->bytes_read += count;
 973         PDEBUG(DBG_IO, "%s: {copy} count used=%ld, new bytes_read=%ld",
 974                __func__,
 975                (unsigned long)count, frame->bytes_read);
 976 
 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 
 986         return count;
 987 }
 988 
 989 static ssize_t usbvision_v4l2_read(struct file *file, char __user *buf,
 990                       size_t count, loff_t *ppos)
 991 {
 992         struct usb_usbvision *usbvision = video_drvdata(file);
 993         int res;
 994 
 995         if (mutex_lock_interruptible(&usbvision->v4l2_lock))
 996                 return -ERESTARTSYS;
 997         res = usbvision_read(file, buf, count, ppos);
 998         mutex_unlock(&usbvision->v4l2_lock);
 999         return res;
1000 }
1001 
1002 static int usbvision_mmap(struct file *file, struct vm_area_struct *vma)
1003 {
1004         unsigned long size = vma->vm_end - vma->vm_start,
1005                 start = vma->vm_start;
1006         void *pos;
1007         u32 i;
1008         struct usb_usbvision *usbvision = video_drvdata(file);
1009 
1010         PDEBUG(DBG_MMAP, "mmap");
1011 
1012         if (!USBVISION_IS_OPERATIONAL(usbvision))
1013                 return -EFAULT;
1014 
1015         if (!(vma->vm_flags & VM_WRITE) ||
1016             size != PAGE_ALIGN(usbvision->max_frame_size)) {
1017                 return -EINVAL;
1018         }
1019 
1020         for (i = 0; i < usbvision->num_frames; i++) {
1021                 if (((PAGE_ALIGN(usbvision->max_frame_size)*i) >> PAGE_SHIFT) ==
1022                     vma->vm_pgoff)
1023                         break;
1024         }
1025         if (i == usbvision->num_frames) {
1026                 PDEBUG(DBG_MMAP,
1027                        "mmap: user supplied mapping address is out of range");
1028                 return -EINVAL;
1029         }
1030 
1031         /* VM_IO is eventually going to replace PageReserved altogether */
1032         vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
1033 
1034         pos = usbvision->frame[i].data;
1035         while (size > 0) {
1036                 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1037                         PDEBUG(DBG_MMAP, "mmap: vm_insert_page failed");
1038                         return -EAGAIN;
1039                 }
1040                 start += PAGE_SIZE;
1041                 pos += PAGE_SIZE;
1042                 size -= PAGE_SIZE;
1043         }
1044 
1045         return 0;
1046 }
1047 
1048 static int usbvision_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
1049 {
1050         struct usb_usbvision *usbvision = video_drvdata(file);
1051         int res;
1052 
1053         if (mutex_lock_interruptible(&usbvision->v4l2_lock))
1054                 return -ERESTARTSYS;
1055         res = usbvision_mmap(file, vma);
1056         mutex_unlock(&usbvision->v4l2_lock);
1057         return res;
1058 }
1059 
1060 /*
1061  * Here comes the stuff for radio on usbvision based devices
1062  *
1063  */
1064 static int usbvision_radio_open(struct file *file)
1065 {
1066         struct usb_usbvision *usbvision = video_drvdata(file);
1067         int err_code = 0;
1068 
1069         PDEBUG(DBG_IO, "%s:", __func__);
1070 
1071         if (mutex_lock_interruptible(&usbvision->v4l2_lock))
1072                 return -ERESTARTSYS;
1073 
1074         if (usbvision->remove_pending) {
1075                 err_code = -ENODEV;
1076                 goto out;
1077         }
1078         err_code = v4l2_fh_open(file);
1079         if (err_code)
1080                 goto out;
1081         if (usbvision->user) {
1082                 dev_err(&usbvision->rdev.dev,
1083                         "%s: Someone tried to open an already opened USBVision Radio!\n",
1084                                 __func__);
1085                 err_code = -EBUSY;
1086         } else {
1087                 /* Alternate interface 1 is is the biggest frame size */
1088                 err_code = usbvision_set_alternate(usbvision);
1089                 if (err_code < 0) {
1090                         usbvision->last_error = err_code;
1091                         err_code = -EBUSY;
1092                         goto out;
1093                 }
1094 
1095                 /* If so far no errors then we shall start the radio */
1096                 usbvision->radio = 1;
1097                 call_all(usbvision, tuner, s_radio);
1098                 usbvision_set_audio(usbvision, USBVISION_AUDIO_RADIO);
1099                 usbvision->user++;
1100         }
1101 out:
1102         mutex_unlock(&usbvision->v4l2_lock);
1103         return err_code;
1104 }
1105 
1106 
1107 static int usbvision_radio_close(struct file *file)
1108 {
1109         struct usb_usbvision *usbvision = video_drvdata(file);
1110         int r;
1111 
1112         PDEBUG(DBG_IO, "");
1113 
1114         mutex_lock(&usbvision->v4l2_lock);
1115         /* Set packet size to 0 */
1116         usbvision->iface_alt = 0;
1117         if (usbvision->dev)
1118                 usb_set_interface(usbvision->dev, usbvision->iface,
1119                                   usbvision->iface_alt);
1120 
1121         usbvision_audio_off(usbvision);
1122         usbvision->radio = 0;
1123         usbvision->user--;
1124         r = usbvision->remove_pending;
1125         mutex_unlock(&usbvision->v4l2_lock);
1126 
1127         if (r) {
1128                 printk(KERN_INFO "%s: Final disconnect\n", __func__);
1129                 v4l2_fh_release(file);
1130                 usbvision_release(usbvision);
1131                 return 0;
1132         }
1133 
1134         PDEBUG(DBG_IO, "success");
1135         return v4l2_fh_release(file);
1136 }
1137 
1138 /* Video registration stuff */
1139 
1140 /* Video template */
1141 static const struct v4l2_file_operations usbvision_fops = {
1142         .owner             = THIS_MODULE,
1143         .open           = usbvision_v4l2_open,
1144         .release        = usbvision_v4l2_close,
1145         .read           = usbvision_v4l2_read,
1146         .mmap           = usbvision_v4l2_mmap,
1147         .unlocked_ioctl = video_ioctl2,
1148 };
1149 
1150 static const struct v4l2_ioctl_ops usbvision_ioctl_ops = {
1151         .vidioc_querycap      = vidioc_querycap,
1152         .vidioc_enum_fmt_vid_cap  = vidioc_enum_fmt_vid_cap,
1153         .vidioc_g_fmt_vid_cap     = vidioc_g_fmt_vid_cap,
1154         .vidioc_try_fmt_vid_cap   = vidioc_try_fmt_vid_cap,
1155         .vidioc_s_fmt_vid_cap     = vidioc_s_fmt_vid_cap,
1156         .vidioc_reqbufs       = vidioc_reqbufs,
1157         .vidioc_querybuf      = vidioc_querybuf,
1158         .vidioc_qbuf          = vidioc_qbuf,
1159         .vidioc_dqbuf         = vidioc_dqbuf,
1160         .vidioc_s_std         = vidioc_s_std,
1161         .vidioc_g_std         = vidioc_g_std,
1162         .vidioc_enum_input    = vidioc_enum_input,
1163         .vidioc_g_input       = vidioc_g_input,
1164         .vidioc_s_input       = vidioc_s_input,
1165         .vidioc_streamon      = vidioc_streamon,
1166         .vidioc_streamoff     = vidioc_streamoff,
1167         .vidioc_g_tuner       = vidioc_g_tuner,
1168         .vidioc_s_tuner       = vidioc_s_tuner,
1169         .vidioc_g_frequency   = vidioc_g_frequency,
1170         .vidioc_s_frequency   = vidioc_s_frequency,
1171         .vidioc_log_status    = v4l2_ctrl_log_status,
1172         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1173         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1174 #ifdef CONFIG_VIDEO_ADV_DEBUG
1175         .vidioc_g_register    = vidioc_g_register,
1176         .vidioc_s_register    = vidioc_s_register,
1177 #endif
1178 };
1179 
1180 static struct video_device usbvision_video_template = {
1181         .fops           = &usbvision_fops,
1182         .ioctl_ops      = &usbvision_ioctl_ops,
1183         .name           = "usbvision-video",
1184         .release        = video_device_release_empty,
1185         .tvnorms        = USBVISION_NORMS,
1186 };
1187 
1188 
1189 /* Radio template */
1190 static const struct v4l2_file_operations usbvision_radio_fops = {
1191         .owner             = THIS_MODULE,
1192         .open           = usbvision_radio_open,
1193         .release        = usbvision_radio_close,
1194         .poll           = v4l2_ctrl_poll,
1195         .unlocked_ioctl = video_ioctl2,
1196 };
1197 
1198 static const struct v4l2_ioctl_ops usbvision_radio_ioctl_ops = {
1199         .vidioc_querycap      = vidioc_querycap,
1200         .vidioc_g_tuner       = vidioc_g_tuner,
1201         .vidioc_s_tuner       = vidioc_s_tuner,
1202         .vidioc_g_frequency   = vidioc_g_frequency,
1203         .vidioc_s_frequency   = vidioc_s_frequency,
1204         .vidioc_log_status    = v4l2_ctrl_log_status,
1205         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1206         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1207 };
1208 
1209 static struct video_device usbvision_radio_template = {
1210         .fops           = &usbvision_radio_fops,
1211         .name           = "usbvision-radio",
1212         .release        = video_device_release_empty,
1213         .ioctl_ops      = &usbvision_radio_ioctl_ops,
1214 };
1215 
1216 
1217 static void usbvision_vdev_init(struct usb_usbvision *usbvision,
1218                                 struct video_device *vdev,
1219                                 const struct video_device *vdev_template,
1220                                 const char *name)
1221 {
1222         struct usb_device *usb_dev = usbvision->dev;
1223 
1224         if (!usb_dev) {
1225                 dev_err(&usbvision->dev->dev,
1226                         "%s: usbvision->dev is not set\n", __func__);
1227                 return;
1228         }
1229 
1230         *vdev = *vdev_template;
1231         vdev->lock = &usbvision->v4l2_lock;
1232         vdev->v4l2_dev = &usbvision->v4l2_dev;
1233         snprintf(vdev->name, sizeof(vdev->name), "%s", name);
1234         video_set_drvdata(vdev, usbvision);
1235 }
1236 
1237 /* unregister video4linux devices */
1238 static void usbvision_unregister_video(struct usb_usbvision *usbvision)
1239 {
1240         /* Radio Device: */
1241         if (video_is_registered(&usbvision->rdev)) {
1242                 PDEBUG(DBG_PROBE, "unregister %s [v4l2]",
1243                        video_device_node_name(&usbvision->rdev));
1244                 video_unregister_device(&usbvision->rdev);
1245         }
1246 
1247         /* Video Device: */
1248         if (video_is_registered(&usbvision->vdev)) {
1249                 PDEBUG(DBG_PROBE, "unregister %s [v4l2]",
1250                        video_device_node_name(&usbvision->vdev));
1251                 video_unregister_device(&usbvision->vdev);
1252         }
1253 }
1254 
1255 /* register video4linux devices */
1256 static int usbvision_register_video(struct usb_usbvision *usbvision)
1257 {
1258         int res = -ENOMEM;
1259 
1260         /* Video Device: */
1261         usbvision_vdev_init(usbvision, &usbvision->vdev,
1262                               &usbvision_video_template, "USBVision Video");
1263         if (!usbvision->have_tuner) {
1264                 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_G_FREQUENCY);
1265                 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_S_TUNER);
1266                 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_G_FREQUENCY);
1267                 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_S_TUNER);
1268         }
1269         usbvision->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE |
1270                                       V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1271         if (usbvision->have_tuner)
1272                 usbvision->vdev.device_caps |= V4L2_CAP_TUNER;
1273 
1274         if (video_register_device(&usbvision->vdev, VFL_TYPE_GRABBER, video_nr) < 0)
1275                 goto err_exit;
1276         printk(KERN_INFO "USBVision[%d]: registered USBVision Video device %s [v4l2]\n",
1277                usbvision->nr, video_device_node_name(&usbvision->vdev));
1278 
1279         /* Radio Device: */
1280         if (usbvision_device_data[usbvision->dev_model].radio) {
1281                 /* usbvision has radio */
1282                 usbvision_vdev_init(usbvision, &usbvision->rdev,
1283                               &usbvision_radio_template, "USBVision Radio");
1284                 usbvision->rdev.device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER;
1285                 if (video_register_device(&usbvision->rdev, VFL_TYPE_RADIO, radio_nr) < 0)
1286                         goto err_exit;
1287                 printk(KERN_INFO "USBVision[%d]: registered USBVision Radio device %s [v4l2]\n",
1288                        usbvision->nr, video_device_node_name(&usbvision->rdev));
1289         }
1290         /* all done */
1291         return 0;
1292 
1293  err_exit:
1294         dev_err(&usbvision->dev->dev,
1295                 "USBVision[%d]: video_register_device() failed\n",
1296                         usbvision->nr);
1297         usbvision_unregister_video(usbvision);
1298         return res;
1299 }
1300 
1301 /*
1302  * usbvision_alloc()
1303  *
1304  * This code allocates the struct usb_usbvision.
1305  * It is filled with default values.
1306  *
1307  * Returns NULL on error, a pointer to usb_usbvision else.
1308  *
1309  */
1310 static struct usb_usbvision *usbvision_alloc(struct usb_device *dev,
1311                                              struct usb_interface *intf)
1312 {
1313         struct usb_usbvision *usbvision;
1314 
1315         usbvision = kzalloc(sizeof(*usbvision), GFP_KERNEL);
1316         if (!usbvision)
1317                 return NULL;
1318 
1319         usbvision->dev = dev;
1320         if (v4l2_device_register(&intf->dev, &usbvision->v4l2_dev))
1321                 goto err_free;
1322 
1323         if (v4l2_ctrl_handler_init(&usbvision->hdl, 4))
1324                 goto err_unreg;
1325         usbvision->v4l2_dev.ctrl_handler = &usbvision->hdl;
1326         mutex_init(&usbvision->v4l2_lock);
1327 
1328         /* prepare control urb for control messages during interrupts */
1329         usbvision->ctrl_urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
1330         if (!usbvision->ctrl_urb)
1331                 goto err_unreg;
1332 
1333         return usbvision;
1334 
1335 err_unreg:
1336         v4l2_ctrl_handler_free(&usbvision->hdl);
1337         v4l2_device_unregister(&usbvision->v4l2_dev);
1338 err_free:
1339         kfree(usbvision);
1340         return NULL;
1341 }
1342 
1343 /*
1344  * usbvision_release()
1345  *
1346  * This code does final release of struct usb_usbvision. This happens
1347  * after the device is disconnected -and- all clients closed their files.
1348  *
1349  */
1350 static void usbvision_release(struct usb_usbvision *usbvision)
1351 {
1352         PDEBUG(DBG_PROBE, "");
1353 
1354         usbvision->initialized = 0;
1355 
1356         usbvision_remove_sysfs(&usbvision->vdev);
1357         usbvision_unregister_video(usbvision);
1358         kfree(usbvision->alt_max_pkt_size);
1359 
1360         usb_free_urb(usbvision->ctrl_urb);
1361 
1362         v4l2_ctrl_handler_free(&usbvision->hdl);
1363         v4l2_device_unregister(&usbvision->v4l2_dev);
1364         kfree(usbvision);
1365 
1366         PDEBUG(DBG_PROBE, "success");
1367 }
1368 
1369 
1370 /*********************** usb interface **********************************/
1371 
1372 static void usbvision_configure_video(struct usb_usbvision *usbvision)
1373 {
1374         int model;
1375 
1376         if (!usbvision)
1377                 return;
1378 
1379         model = usbvision->dev_model;
1380         usbvision->palette = usbvision_v4l2_format[2]; /* V4L2_PIX_FMT_RGB24; */
1381 
1382         if (usbvision_device_data[usbvision->dev_model].vin_reg2_override) {
1383                 usbvision->vin_reg2_preset =
1384                         usbvision_device_data[usbvision->dev_model].vin_reg2;
1385         } else {
1386                 usbvision->vin_reg2_preset = 0;
1387         }
1388 
1389         usbvision->tvnorm_id = usbvision_device_data[model].video_norm;
1390         usbvision->video_inputs = usbvision_device_data[model].video_channels;
1391         usbvision->ctl_input = 0;
1392         usbvision->radio_freq = 87.5 * 16000;
1393         usbvision->tv_freq = 400 * 16;
1394 
1395         /* This should be here to make i2c clients to be able to register */
1396         /* first switch off audio */
1397         if (usbvision_device_data[model].audio_channels > 0)
1398                 usbvision_audio_off(usbvision);
1399         /* and then power up the tuner */
1400         usbvision_power_on(usbvision);
1401         usbvision_i2c_register(usbvision);
1402 }
1403 
1404 /*
1405  * usbvision_probe()
1406  *
1407  * This procedure queries device descriptor and accepts the interface
1408  * if it looks like USBVISION video device
1409  *
1410  */
1411 static int usbvision_probe(struct usb_interface *intf,
1412                            const struct usb_device_id *devid)
1413 {
1414         struct usb_device *dev = usb_get_dev(interface_to_usbdev(intf));
1415         struct usb_interface *uif;
1416         __u8 ifnum = intf->altsetting->desc.bInterfaceNumber;
1417         const struct usb_host_interface *interface;
1418         struct usb_usbvision *usbvision = NULL;
1419         const struct usb_endpoint_descriptor *endpoint;
1420         int model, i, ret;
1421 
1422         PDEBUG(DBG_PROBE, "VID=%#04x, PID=%#04x, ifnum=%u",
1423                                 le16_to_cpu(dev->descriptor.idVendor),
1424                                 le16_to_cpu(dev->descriptor.idProduct), ifnum);
1425 
1426         model = devid->driver_info;
1427         if (model < 0 || model >= usbvision_device_data_size) {
1428                 PDEBUG(DBG_PROBE, "model out of bounds %d", model);
1429                 ret = -ENODEV;
1430                 goto err_usb;
1431         }
1432         printk(KERN_INFO "%s: %s found\n", __func__,
1433                                 usbvision_device_data[model].model_string);
1434 
1435         if (usbvision_device_data[model].interface >= 0)
1436                 interface = &dev->actconfig->interface[usbvision_device_data[model].interface]->altsetting[0];
1437         else if (ifnum < dev->actconfig->desc.bNumInterfaces)
1438                 interface = &dev->actconfig->interface[ifnum]->altsetting[0];
1439         else {
1440                 dev_err(&intf->dev, "interface %d is invalid, max is %d\n",
1441                     ifnum, dev->actconfig->desc.bNumInterfaces - 1);
1442                 ret = -ENODEV;
1443                 goto err_usb;
1444         }
1445 
1446         if (interface->desc.bNumEndpoints < 2) {
1447                 dev_err(&intf->dev, "interface %d has %d endpoints, but must have minimum 2\n",
1448                         ifnum, interface->desc.bNumEndpoints);
1449                 ret = -ENODEV;
1450                 goto err_usb;
1451         }
1452         endpoint = &interface->endpoint[1].desc;
1453 
1454         if (!usb_endpoint_xfer_isoc(endpoint)) {
1455                 dev_err(&intf->dev, "%s: interface %d. has non-ISO endpoint!\n",
1456                     __func__, ifnum);
1457                 dev_err(&intf->dev, "%s: Endpoint attributes %d",
1458                     __func__, endpoint->bmAttributes);
1459                 ret = -ENODEV;
1460                 goto err_usb;
1461         }
1462         if (usb_endpoint_dir_out(endpoint)) {
1463                 dev_err(&intf->dev, "%s: interface %d. has ISO OUT endpoint!\n",
1464                     __func__, ifnum);
1465                 ret = -ENODEV;
1466                 goto err_usb;
1467         }
1468 
1469         usbvision = usbvision_alloc(dev, intf);
1470         if (!usbvision) {
1471                 dev_err(&intf->dev, "%s: couldn't allocate USBVision struct\n", __func__);
1472                 ret = -ENOMEM;
1473                 goto err_usb;
1474         }
1475 
1476         if (dev->descriptor.bNumConfigurations > 1)
1477                 usbvision->bridge_type = BRIDGE_NT1004;
1478         else if (model == DAZZLE_DVC_90_REV_1_SECAM)
1479                 usbvision->bridge_type = BRIDGE_NT1005;
1480         else
1481                 usbvision->bridge_type = BRIDGE_NT1003;
1482         PDEBUG(DBG_PROBE, "bridge_type %d", usbvision->bridge_type);
1483 
1484         /* compute alternate max packet sizes */
1485         uif = dev->actconfig->interface[0];
1486 
1487         usbvision->num_alt = uif->num_altsetting;
1488         PDEBUG(DBG_PROBE, "Alternate settings: %i", usbvision->num_alt);
1489         usbvision->alt_max_pkt_size = kmalloc_array(32, usbvision->num_alt,
1490                                                     GFP_KERNEL);
1491         if (!usbvision->alt_max_pkt_size) {
1492                 ret = -ENOMEM;
1493                 goto err_pkt;
1494         }
1495 
1496         for (i = 0; i < usbvision->num_alt; i++) {
1497                 u16 tmp;
1498 
1499                 if (uif->altsetting[i].desc.bNumEndpoints < 2) {
1500                         ret = -ENODEV;
1501                         goto err_pkt;
1502                 }
1503 
1504                 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1505                                       wMaxPacketSize);
1506                 usbvision->alt_max_pkt_size[i] =
1507                         (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1508                 PDEBUG(DBG_PROBE, "Alternate setting %i, max size= %i", i,
1509                        usbvision->alt_max_pkt_size[i]);
1510         }
1511 
1512 
1513         usbvision->nr = usbvision_nr++;
1514 
1515         spin_lock_init(&usbvision->queue_lock);
1516         init_waitqueue_head(&usbvision->wait_frame);
1517         init_waitqueue_head(&usbvision->wait_stream);
1518 
1519         usbvision->have_tuner = usbvision_device_data[model].tuner;
1520         if (usbvision->have_tuner)
1521                 usbvision->tuner_type = usbvision_device_data[model].tuner_type;
1522 
1523         usbvision->dev_model = model;
1524         usbvision->remove_pending = 0;
1525         usbvision->iface = ifnum;
1526         usbvision->iface_alt = 0;
1527         usbvision->video_endp = endpoint->bEndpointAddress;
1528         usbvision->isoc_packet_size = 0;
1529         usbvision->usb_bandwidth = 0;
1530         usbvision->user = 0;
1531         usbvision->streaming = stream_off;
1532         usbvision_configure_video(usbvision);
1533         usbvision_register_video(usbvision);
1534 
1535         usbvision_create_sysfs(&usbvision->vdev);
1536 
1537         PDEBUG(DBG_PROBE, "success");
1538         return 0;
1539 
1540 err_pkt:
1541         usbvision_release(usbvision);
1542 err_usb:
1543         usb_put_dev(dev);
1544         return ret;
1545 }
1546 
1547 
1548 /*
1549  * usbvision_disconnect()
1550  *
1551  * This procedure stops all driver activity, deallocates interface-private
1552  * structure (pointed by 'ptr') and after that driver should be removable
1553  * with no ill consequences.
1554  *
1555  */
1556 static void usbvision_disconnect(struct usb_interface *intf)
1557 {
1558         struct usb_usbvision *usbvision = to_usbvision(usb_get_intfdata(intf));
1559         int u;
1560 
1561         PDEBUG(DBG_PROBE, "");
1562 
1563         if (!usbvision) {
1564                 pr_err("%s: usb_get_intfdata() failed\n", __func__);
1565                 return;
1566         }
1567 
1568         mutex_lock(&usbvision->v4l2_lock);
1569 
1570         /* At this time we ask to cancel outstanding URBs */
1571         usbvision_stop_isoc(usbvision);
1572 
1573         v4l2_device_disconnect(&usbvision->v4l2_dev);
1574         usbvision_i2c_unregister(usbvision);
1575         usbvision->remove_pending = 1;  /* Now all ISO data will be ignored */
1576         u = usbvision->user;
1577 
1578         usb_put_dev(usbvision->dev);
1579         usbvision->dev = NULL;  /* USB device is no more */
1580 
1581         mutex_unlock(&usbvision->v4l2_lock);
1582 
1583         if (u) {
1584                 printk(KERN_INFO "%s: In use, disconnect pending\n",
1585                        __func__);
1586                 wake_up_interruptible(&usbvision->wait_frame);
1587                 wake_up_interruptible(&usbvision->wait_stream);
1588         } else {
1589                 usbvision_release(usbvision);
1590         }
1591 
1592         PDEBUG(DBG_PROBE, "success");
1593 }
1594 
1595 static struct usb_driver usbvision_driver = {
1596         .name           = "usbvision",
1597         .id_table       = usbvision_table,
1598         .probe          = usbvision_probe,
1599         .disconnect     = usbvision_disconnect,
1600 };
1601 
1602 /*
1603  * usbvision_init()
1604  *
1605  * This code is run to initialize the driver.
1606  *
1607  */
1608 static int __init usbvision_init(void)
1609 {
1610         int err_code;
1611 
1612         PDEBUG(DBG_PROBE, "");
1613 
1614         PDEBUG(DBG_IO,  "IO      debugging is enabled [video]");
1615         PDEBUG(DBG_PROBE, "PROBE   debugging is enabled [video]");
1616         PDEBUG(DBG_MMAP, "MMAP    debugging is enabled [video]");
1617 
1618         /* disable planar mode support unless compression enabled */
1619         if (isoc_mode != ISOC_MODE_COMPRESS) {
1620                 /* FIXME : not the right way to set supported flag */
1621                 usbvision_v4l2_format[6].supported = 0; /* V4L2_PIX_FMT_YVU420 */
1622                 usbvision_v4l2_format[7].supported = 0; /* V4L2_PIX_FMT_YUV422P */
1623         }
1624 
1625         err_code = usb_register(&usbvision_driver);
1626 
1627         if (err_code == 0) {
1628                 printk(KERN_INFO DRIVER_DESC " : " USBVISION_VERSION_STRING "\n");
1629                 PDEBUG(DBG_PROBE, "success");
1630         }
1631         return err_code;
1632 }
1633 
1634 static void __exit usbvision_exit(void)
1635 {
1636         PDEBUG(DBG_PROBE, "");
1637 
1638         usb_deregister(&usbvision_driver);
1639         PDEBUG(DBG_PROBE, "success");
1640 }
1641 
1642 module_init(usbvision_init);
1643 module_exit(usbvision_exit);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/media/usb/usbvision/usbvision-video.c

DEFINITIONS
