drivers/media/usb/pwc/pwc-if.c

   1 /* Linux driver for Philips webcam
   2    USB and Video4Linux interface part.
   3    (C) 1999-2004 Nemosoft Unv.
   4    (C) 2004-2006 Luc Saillard (luc@saillard.org)
   5    (C) 2011 Hans de Goede <hdegoede@redhat.com>
   6
   7    NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
   8    driver and thus may have bugs that are not present in the original version.
   9    Please send bug reports and support requests to <luc@saillard.org>.
  10    The decompression routines have been implemented by reverse-engineering the
  11    Nemosoft binary pwcx module. Caveat emptor.
  12
  13    This program is free software; you can redistribute it and/or modify
  14    it under the terms of the GNU General Public License as published by
  15    the Free Software Foundation; either version 2 of the License, or
  16    (at your option) any later version.
  17
  18    This program is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program; if not, write to the Free Software
  25    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  26
  27 */
  28
  29 /*
  30    This code forms the interface between the USB layers and the Philips
  31    specific stuff. Some adanved stuff of the driver falls under an
  32    NDA, signed between me and Philips B.V., Eindhoven, the Netherlands, and
  33    is thus not distributed in source form. The binary pwcx.o module
  34    contains the code that falls under the NDA.
  35
  36    In case you're wondering: 'pwc' stands for "Philips WebCam", but
  37    I really didn't want to type 'philips_web_cam' every time (I'm lazy as
  38    any Linux kernel hacker, but I don't like uncomprehensible abbreviations
  39    without explanation).
  40
  41    Oh yes, convention: to disctinguish between all the various pointers to
  42    device-structures, I use these names for the pointer variables:
  43    udev: struct usb_device *
  44    vdev: struct video_device (member of pwc_dev)
  45    pdev: struct pwc_devive *
  46 */
  47
  48 /* Contributors:
  49    - Alvarado: adding whitebalance code
  50    - Alistar Moire: QuickCam 3000 Pro device/product ID
  51    - Tony Hoyle: Creative Labs Webcam 5 device/product ID
  52    - Mark Burazin: solving hang in VIDIOCSYNC when camera gets unplugged
  53    - Jk Fang: Sotec Afina Eye ID
  54    - Xavier Roche: QuickCam Pro 4000 ID
  55    - Jens Knudsen: QuickCam Zoom ID
  56    - J. Debert: QuickCam for Notebooks ID
  57    - Pham Thanh Nam: webcam snapshot button as an event input device
  58 */
  59
  60 #include <linux/errno.h>
  61 #include <linux/init.h>
  62 #include <linux/mm.h>
  63 #include <linux/module.h>
  64 #include <linux/poll.h>
  65 #include <linux/slab.h>
  66 #ifdef CONFIG_USB_PWC_INPUT_EVDEV
  67 #include <linux/usb/input.h>
  68 #endif
  69 #include <linux/vmalloc.h>
  70 #include <asm/io.h>
  71 #include <linux/kernel.h>               /* simple_strtol() */
  72
  73 #include "pwc.h"
  74 #include "pwc-kiara.h"
  75 #include "pwc-timon.h"
  76 #include "pwc-dec23.h"
  77 #include "pwc-dec1.h"
  78
  79 /* Function prototypes and driver templates */
  80
  81 /* hotplug device table support */
  82 static const struct usb_device_id pwc_device_table [] = {
  83         { USB_DEVICE(0x0471, 0x0302) }, /* Philips models */
  84         { USB_DEVICE(0x0471, 0x0303) },
  85         { USB_DEVICE(0x0471, 0x0304) },
  86         { USB_DEVICE(0x0471, 0x0307) },
  87         { USB_DEVICE(0x0471, 0x0308) },
  88         { USB_DEVICE(0x0471, 0x030C) },
  89         { USB_DEVICE(0x0471, 0x0310) },
  90         { USB_DEVICE(0x0471, 0x0311) }, /* Philips ToUcam PRO II */
  91         { USB_DEVICE(0x0471, 0x0312) },
  92         { USB_DEVICE(0x0471, 0x0313) }, /* the 'new' 720K */
  93         { USB_DEVICE(0x0471, 0x0329) }, /* Philips SPC 900NC PC Camera */
  94         { USB_DEVICE(0x069A, 0x0001) }, /* Askey */
  95         { USB_DEVICE(0x046D, 0x08B0) }, /* Logitech QuickCam Pro 3000 */
  96         { USB_DEVICE(0x046D, 0x08B1) }, /* Logitech QuickCam Notebook Pro */
  97         { USB_DEVICE(0x046D, 0x08B2) }, /* Logitech QuickCam Pro 4000 */
  98         { USB_DEVICE(0x046D, 0x08B3) }, /* Logitech QuickCam Zoom (old model) */
  99         { USB_DEVICE(0x046D, 0x08B4) }, /* Logitech QuickCam Zoom (new model) */
 100         { USB_DEVICE(0x046D, 0x08B5) }, /* Logitech QuickCam Orbit/Sphere */
 101         { USB_DEVICE(0x046D, 0x08B6) }, /* Cisco VT Camera */
 102         { USB_DEVICE(0x046D, 0x08B7) }, /* Logitech ViewPort AV 100 */
 103         { USB_DEVICE(0x046D, 0x08B8) }, /* Logitech (reserved) */
 104         { USB_DEVICE(0x055D, 0x9000) }, /* Samsung MPC-C10 */
 105         { USB_DEVICE(0x055D, 0x9001) }, /* Samsung MPC-C30 */
 106         { USB_DEVICE(0x055D, 0x9002) }, /* Samsung SNC-35E (Ver3.0) */
 107         { USB_DEVICE(0x041E, 0x400C) }, /* Creative Webcam 5 */
 108         { USB_DEVICE(0x041E, 0x4011) }, /* Creative Webcam Pro Ex */
 109         { USB_DEVICE(0x04CC, 0x8116) }, /* Afina Eye */
 110         { USB_DEVICE(0x06BE, 0x8116) }, /* new Afina Eye */
 111         { USB_DEVICE(0x0d81, 0x1910) }, /* Visionite */
 112         { USB_DEVICE(0x0d81, 0x1900) },
 113         { }
 114 };
 115 MODULE_DEVICE_TABLE(usb, pwc_device_table);
 116
 117 static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id *id);
 118 static void usb_pwc_disconnect(struct usb_interface *intf);
 119 static void pwc_isoc_cleanup(struct pwc_device *pdev);
 120
 121 static struct usb_driver pwc_driver = {
 122         .name =                 "Philips webcam",       /* name */
 123         .id_table =             pwc_device_table,
 124         .probe =                usb_pwc_probe,          /* probe() */
 125         .disconnect =           usb_pwc_disconnect,     /* disconnect() */
 126 };
 127
 128 #define MAX_DEV_HINTS   20
 129 #define MAX_ISOC_ERRORS 20
 130
 131 #ifdef CONFIG_USB_PWC_DEBUG
 132         int pwc_trace = PWC_DEBUG_LEVEL;
 133 #endif
 134 static int power_save = -1;
 135 static int leds[2] = { 100, 0 };
 136
 137 /***/
 138
 139 static const struct v4l2_file_operations pwc_fops = {
 140         .owner =        THIS_MODULE,
 141         .open =         v4l2_fh_open,
 142         .release =      vb2_fop_release,
 143         .read =         vb2_fop_read,
 144         .poll =         vb2_fop_poll,
 145         .mmap =         vb2_fop_mmap,
 146         .unlocked_ioctl = video_ioctl2,
 147 };
 148 static struct video_device pwc_template = {
 149         .name =         "Philips Webcam",       /* Filled in later */
 150         .release =      video_device_release_empty,
 151         .fops =         &pwc_fops,
 152         .ioctl_ops =    &pwc_ioctl_ops,
 153 };
 154
 155 /***************************************************************************/
 156 /* Private functions */
 157
 158 static struct pwc_frame_buf *pwc_get_next_fill_buf(struct pwc_device *pdev)
 159 {
 160         unsigned long flags = 0;
 161         struct pwc_frame_buf *buf = NULL;
 162
 163         spin_lock_irqsave(&pdev->queued_bufs_lock, flags);
 164         if (list_empty(&pdev->queued_bufs))
 165                 goto leave;
 166
 167         buf = list_entry(pdev->queued_bufs.next, struct pwc_frame_buf, list);
 168         list_del(&buf->list);
 169 leave:
 170         spin_unlock_irqrestore(&pdev->queued_bufs_lock, flags);
 171         return buf;
 172 }
 173
 174 static void pwc_snapshot_button(struct pwc_device *pdev, int down)
 175 {
 176         if (down) {
 177                 PWC_TRACE("Snapshot button pressed.\n");
 178         } else {
 179                 PWC_TRACE("Snapshot button released.\n");
 180         }
 181
 182 #ifdef CONFIG_USB_PWC_INPUT_EVDEV
 183         if (pdev->button_dev) {
 184                 input_report_key(pdev->button_dev, KEY_CAMERA, down);
 185                 input_sync(pdev->button_dev);
 186         }
 187 #endif
 188 }
 189
 190 static void pwc_frame_complete(struct pwc_device *pdev)
 191 {
 192         struct pwc_frame_buf *fbuf = pdev->fill_buf;
 193
 194         /* The ToUCam Fun CMOS sensor causes the firmware to send 2 or 3 bogus
 195            frames on the USB wire after an exposure change. This conditition is
 196            however detected  in the cam and a bit is set in the header.
 197            */
 198         if (pdev->type == 730) {
 199                 unsigned char *ptr = (unsigned char *)fbuf->data;
 200
 201                 if (ptr[1] == 1 && ptr[0] & 0x10) {
 202                         PWC_TRACE("Hyundai CMOS sensor bug. Dropping frame.\n");
 203                         pdev->drop_frames += 2;
 204                 }
 205                 if ((ptr[0] ^ pdev->vmirror) & 0x01) {
 206                         pwc_snapshot_button(pdev, ptr[0] & 0x01);
 207                 }
 208                 if ((ptr[0] ^ pdev->vmirror) & 0x02) {
 209                         if (ptr[0] & 0x02)
 210                                 PWC_TRACE("Image is mirrored.\n");
 211                         else
 212                                 PWC_TRACE("Image is normal.\n");
 213                 }
 214                 pdev->vmirror = ptr[0] & 0x03;
 215                 /* Sometimes the trailer of the 730 is still sent as a 4 byte packet
 216                    after a short frame; this condition is filtered out specifically. A 4 byte
 217                    frame doesn't make sense anyway.
 218                    So we get either this sequence:
 219                    drop_bit set -> 4 byte frame -> short frame -> good frame
 220                    Or this one:
 221                    drop_bit set -> short frame -> good frame
 222                    So we drop either 3 or 2 frames in all!
 223                    */
 224                 if (fbuf->filled == 4)
 225                         pdev->drop_frames++;
 226         } else if (pdev->type == 740 || pdev->type == 720) {
 227                 unsigned char *ptr = (unsigned char *)fbuf->data;
 228                 if ((ptr[0] ^ pdev->vmirror) & 0x01) {
 229                         pwc_snapshot_button(pdev, ptr[0] & 0x01);
 230                 }
 231                 pdev->vmirror = ptr[0] & 0x03;
 232         }
 233
 234         /* In case we were instructed to drop the frame, do so silently. */
 235         if (pdev->drop_frames > 0) {
 236                 pdev->drop_frames--;
 237         } else {
 238                 /* Check for underflow first */
 239                 if (fbuf->filled < pdev->frame_total_size) {
 240                         PWC_DEBUG_FLOW("Frame buffer underflow (%d bytes);"
 241                                        " discarded.\n", fbuf->filled);
 242                 } else {
 243                         fbuf->vb.field = V4L2_FIELD_NONE;
 244                         fbuf->vb.sequence = pdev->vframe_count;
 245                         vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
 246                         pdev->fill_buf = NULL;
 247                         pdev->vsync = 0;
 248                 }
 249         } /* !drop_frames */
 250         pdev->vframe_count++;
 251 }
 252
 253 /* This gets called for the Isochronous pipe (video). This is done in
 254  * interrupt time, so it has to be fast, not crash, and not stall. Neat.
 255  */
 256 static void pwc_isoc_handler(struct urb *urb)
 257 {
 258         struct pwc_device *pdev = (struct pwc_device *)urb->context;
 259         int i, fst, flen;
 260         unsigned char *iso_buf = NULL;
 261
 262         if (urb->status == -ENOENT || urb->status == -ECONNRESET ||
 263             urb->status == -ESHUTDOWN) {
 264                 PWC_DEBUG_OPEN("URB (%p) unlinked %ssynchronuously.\n", urb, urb->status == -ENOENT ? "" : "a");
 265                 return;
 266         }
 267
 268         if (pdev->fill_buf == NULL)
 269                 pdev->fill_buf = pwc_get_next_fill_buf(pdev);
 270
 271         if (urb->status != 0) {
 272                 const char *errmsg;
 273
 274                 errmsg = "Unknown";
 275                 switch(urb->status) {
 276                         case -ENOSR:            errmsg = "Buffer error (overrun)"; break;
 277                         case -EPIPE:            errmsg = "Stalled (device not responding)"; break;
 278                         case -EOVERFLOW:        errmsg = "Babble (bad cable?)"; break;
 279                         case -EPROTO:           errmsg = "Bit-stuff error (bad cable?)"; break;
 280                         case -EILSEQ:           errmsg = "CRC/Timeout (could be anything)"; break;
 281                         case -ETIME:            errmsg = "Device does not respond"; break;
 282                 }
 283                 PWC_ERROR("pwc_isoc_handler() called with status %d [%s].\n",
 284                           urb->status, errmsg);
 285                 /* Give up after a number of contiguous errors */
 286                 if (++pdev->visoc_errors > MAX_ISOC_ERRORS)
 287                 {
 288                         PWC_ERROR("Too many ISOC errors, bailing out.\n");
 289                         if (pdev->fill_buf) {
 290                                 vb2_buffer_done(&pdev->fill_buf->vb.vb2_buf,
 291                                                 VB2_BUF_STATE_ERROR);
 292                                 pdev->fill_buf = NULL;
 293                         }
 294                 }
 295                 pdev->vsync = 0; /* Drop the current frame */
 296                 goto handler_end;
 297         }
 298
 299         /* Reset ISOC error counter. We did get here, after all. */
 300         pdev->visoc_errors = 0;
 301
 302         /* vsync: 0 = don't copy data
 303                   1 = sync-hunt
 304                   2 = synched
 305          */
 306         /* Compact data */
 307         for (i = 0; i < urb->number_of_packets; i++) {
 308                 fst  = urb->iso_frame_desc[i].status;
 309                 flen = urb->iso_frame_desc[i].actual_length;
 310                 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 311                 if (fst != 0) {
 312                         PWC_ERROR("Iso frame %d has error %d\n", i, fst);
 313                         continue;
 314                 }
 315                 if (flen > 0 && pdev->vsync) {
 316                         struct pwc_frame_buf *fbuf = pdev->fill_buf;
 317
 318                         if (pdev->vsync == 1) {
 319                                 v4l2_get_timestamp(
 320                                         &fbuf->vb.timestamp);
 321                                 pdev->vsync = 2;
 322                         }
 323
 324                         if (flen + fbuf->filled > pdev->frame_total_size) {
 325                                 PWC_ERROR("Frame overflow (%d > %d)\n",
 326                                           flen + fbuf->filled,
 327                                           pdev->frame_total_size);
 328                                 pdev->vsync = 0; /* Let's wait for an EOF */
 329                         } else {
 330                                 memcpy(fbuf->data + fbuf->filled, iso_buf,
 331                                        flen);
 332                                 fbuf->filled += flen;
 333                         }
 334                 }
 335                 if (flen < pdev->vlast_packet_size) {
 336                         /* Shorter packet... end of frame */
 337                         if (pdev->vsync == 2)
 338                                 pwc_frame_complete(pdev);
 339                         if (pdev->fill_buf == NULL)
 340                                 pdev->fill_buf = pwc_get_next_fill_buf(pdev);
 341                         if (pdev->fill_buf) {
 342                                 pdev->fill_buf->filled = 0;
 343                                 pdev->vsync = 1;
 344                         }
 345                 }
 346                 pdev->vlast_packet_size = flen;
 347         }
 348
 349 handler_end:
 350         i = usb_submit_urb(urb, GFP_ATOMIC);
 351         if (i != 0)
 352                 PWC_ERROR("Error (%d) re-submitting urb in pwc_isoc_handler.\n", i);
 353 }
 354
 355 /* Both v4l2_lock and vb_queue_lock should be locked when calling this */
 356 static int pwc_isoc_init(struct pwc_device *pdev)
 357 {
 358         struct usb_device *udev;
 359         struct urb *urb;
 360         int i, j, ret;
 361         struct usb_interface *intf;
 362         struct usb_host_interface *idesc = NULL;
 363         int compression = 0; /* 0..3 = uncompressed..high */
 364
 365         pdev->vsync = 0;
 366         pdev->vlast_packet_size = 0;
 367         pdev->fill_buf = NULL;
 368         pdev->vframe_count = 0;
 369         pdev->visoc_errors = 0;
 370         udev = pdev->udev;
 371
 372 retry:
 373         /* We first try with low compression and then retry with a higher
 374            compression setting if there is not enough bandwidth. */
 375         ret = pwc_set_video_mode(pdev, pdev->width, pdev->height, pdev->pixfmt,
 376                                  pdev->vframes, &compression, 1);
 377
 378         /* Get the current alternate interface, adjust packet size */
 379         intf = usb_ifnum_to_if(udev, 0);
 380         if (intf)
 381                 idesc = usb_altnum_to_altsetting(intf, pdev->valternate);
 382         if (!idesc)
 383                 return -EIO;
 384
 385         /* Search video endpoint */
 386         pdev->vmax_packet_size = -1;
 387         for (i = 0; i < idesc->desc.bNumEndpoints; i++) {
 388                 if ((idesc->endpoint[i].desc.bEndpointAddress & 0xF) == pdev->vendpoint) {
 389                         pdev->vmax_packet_size = le16_to_cpu(idesc->endpoint[i].desc.wMaxPacketSize);
 390                         break;
 391                 }
 392         }
 393
 394         if (pdev->vmax_packet_size < 0 || pdev->vmax_packet_size > ISO_MAX_FRAME_SIZE) {
 395                 PWC_ERROR("Failed to find packet size for video endpoint in current alternate setting.\n");
 396                 return -ENFILE; /* Odd error, that should be noticeable */
 397         }
 398
 399         /* Set alternate interface */
 400         PWC_DEBUG_OPEN("Setting alternate interface %d\n", pdev->valternate);
 401         ret = usb_set_interface(pdev->udev, 0, pdev->valternate);
 402         if (ret == -ENOSPC && compression < 3) {
 403                 compression++;
 404                 goto retry;
 405         }
 406         if (ret < 0)
 407                 return ret;
 408
 409         /* Allocate and init Isochronuous urbs */
 410         for (i = 0; i < MAX_ISO_BUFS; i++) {
 411                 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
 412                 if (urb == NULL) {
 413                         PWC_ERROR("Failed to allocate urb %d\n", i);
 414                         pwc_isoc_cleanup(pdev);
 415                         return -ENOMEM;
 416                 }
 417                 pdev->urbs[i] = urb;
 418                 PWC_DEBUG_MEMORY("Allocated URB at 0x%p\n", urb);
 419
 420                 urb->interval = 1; // devik
 421                 urb->dev = udev;
 422                 urb->pipe = usb_rcvisocpipe(udev, pdev->vendpoint);
 423                 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
 424                 urb->transfer_buffer = usb_alloc_coherent(udev,
 425                                                           ISO_BUFFER_SIZE,
 426                                                           GFP_KERNEL,
 427                                                           &urb->transfer_dma);
 428                 if (urb->transfer_buffer == NULL) {
 429                         PWC_ERROR("Failed to allocate urb buffer %d\n", i);
 430                         pwc_isoc_cleanup(pdev);
 431                         return -ENOMEM;
 432                 }
 433                 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
 434                 urb->complete = pwc_isoc_handler;
 435                 urb->context = pdev;
 436                 urb->start_frame = 0;
 437                 urb->number_of_packets = ISO_FRAMES_PER_DESC;
 438                 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
 439                         urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
 440                         urb->iso_frame_desc[j].length = pdev->vmax_packet_size;
 441                 }
 442         }
 443
 444         /* link */
 445         for (i = 0; i < MAX_ISO_BUFS; i++) {
 446                 ret = usb_submit_urb(pdev->urbs[i], GFP_KERNEL);
 447                 if (ret == -ENOSPC && compression < 3) {
 448                         compression++;
 449                         pwc_isoc_cleanup(pdev);
 450                         goto retry;
 451                 }
 452                 if (ret) {
 453                         PWC_ERROR("isoc_init() submit_urb %d failed with error %d\n", i, ret);
 454                         pwc_isoc_cleanup(pdev);
 455                         return ret;
 456                 }
 457                 PWC_DEBUG_MEMORY("URB 0x%p submitted.\n", pdev->urbs[i]);
 458         }
 459
 460         /* All is done... */
 461         PWC_DEBUG_OPEN("<< pwc_isoc_init()\n");
 462         return 0;
 463 }
 464
 465 static void pwc_iso_stop(struct pwc_device *pdev)
 466 {
 467         int i;
 468
 469         /* Unlinking ISOC buffers one by one */
 470         for (i = 0; i < MAX_ISO_BUFS; i++) {
 471                 if (pdev->urbs[i]) {
 472                         PWC_DEBUG_MEMORY("Unlinking URB %p\n", pdev->urbs[i]);
 473                         usb_kill_urb(pdev->urbs[i]);
 474                 }
 475         }
 476 }
 477
 478 static void pwc_iso_free(struct pwc_device *pdev)
 479 {
 480         int i;
 481
 482         /* Freeing ISOC buffers one by one */
 483         for (i = 0; i < MAX_ISO_BUFS; i++) {
 484                 if (pdev->urbs[i]) {
 485                         PWC_DEBUG_MEMORY("Freeing URB\n");
 486                         if (pdev->urbs[i]->transfer_buffer) {
 487                                 usb_free_coherent(pdev->udev,
 488                                         pdev->urbs[i]->transfer_buffer_length,
 489                                         pdev->urbs[i]->transfer_buffer,
 490                                         pdev->urbs[i]->transfer_dma);
 491                         }
 492                         usb_free_urb(pdev->urbs[i]);
 493                         pdev->urbs[i] = NULL;
 494                 }
 495         }
 496 }
 497
 498 /* Both v4l2_lock and vb_queue_lock should be locked when calling this */
 499 static void pwc_isoc_cleanup(struct pwc_device *pdev)
 500 {
 501         PWC_DEBUG_OPEN(">> pwc_isoc_cleanup()\n");
 502
 503         pwc_iso_stop(pdev);
 504         pwc_iso_free(pdev);
 505         usb_set_interface(pdev->udev, 0, 0);
 506
 507         PWC_DEBUG_OPEN("<< pwc_isoc_cleanup()\n");
 508 }
 509
 510 /* Must be called with vb_queue_lock hold */
 511 static void pwc_cleanup_queued_bufs(struct pwc_device *pdev,
 512                                     enum vb2_buffer_state state)
 513 {
 514         unsigned long flags = 0;
 515
 516         spin_lock_irqsave(&pdev->queued_bufs_lock, flags);
 517         while (!list_empty(&pdev->queued_bufs)) {
 518                 struct pwc_frame_buf *buf;
 519
 520                 buf = list_entry(pdev->queued_bufs.next, struct pwc_frame_buf,
 521                                  list);
 522                 list_del(&buf->list);
 523                 vb2_buffer_done(&buf->vb.vb2_buf, state);
 524         }
 525         spin_unlock_irqrestore(&pdev->queued_bufs_lock, flags);
 526 }
 527
 528 #ifdef CONFIG_USB_PWC_DEBUG
 529 static const char *pwc_sensor_type_to_string(unsigned int sensor_type)
 530 {
 531         switch(sensor_type) {
 532                 case 0x00:
 533                         return "Hyundai CMOS sensor";
 534                 case 0x20:
 535                         return "Sony CCD sensor + TDA8787";
 536                 case 0x2E:
 537                         return "Sony CCD sensor + Exas 98L59";
 538                 case 0x2F:
 539                         return "Sony CCD sensor + ADI 9804";
 540                 case 0x30:
 541                         return "Sharp CCD sensor + TDA8787";
 542                 case 0x3E:
 543                         return "Sharp CCD sensor + Exas 98L59";
 544                 case 0x3F:
 545                         return "Sharp CCD sensor + ADI 9804";
 546                 case 0x40:
 547                         return "UPA 1021 sensor";
 548                 case 0x100:
 549                         return "VGA sensor";
 550                 case 0x101:
 551                         return "PAL MR sensor";
 552                 default:
 553                         return "unknown type of sensor";
 554         }
 555 }
 556 #endif
 557
 558 /***************************************************************************/
 559 /* Video4Linux functions */
 560
 561 static void pwc_video_release(struct v4l2_device *v)
 562 {
 563         struct pwc_device *pdev = container_of(v, struct pwc_device, v4l2_dev);
 564
 565         v4l2_ctrl_handler_free(&pdev->ctrl_handler);
 566         v4l2_device_unregister(&pdev->v4l2_dev);
 567         kfree(pdev->ctrl_buf);
 568         kfree(pdev);
 569 }
 570
 571 /***************************************************************************/
 572 /* Videobuf2 operations */
 573
 574 static int queue_setup(struct vb2_queue *vq, const void *parg,
 575                                 unsigned int *nbuffers, unsigned int *nplanes,
 576                                 unsigned int sizes[], void *alloc_ctxs[])
 577 {
 578         struct pwc_device *pdev = vb2_get_drv_priv(vq);
 579         int size;
 580
 581         if (*nbuffers < MIN_FRAMES)
 582                 *nbuffers = MIN_FRAMES;
 583         else if (*nbuffers > MAX_FRAMES)
 584                 *nbuffers = MAX_FRAMES;
 585
 586         *nplanes = 1;
 587
 588         size = pwc_get_size(pdev, MAX_WIDTH, MAX_HEIGHT);
 589         sizes[0] = PAGE_ALIGN(pwc_image_sizes[size][0] *
 590                               pwc_image_sizes[size][1] * 3 / 2);
 591
 592         return 0;
 593 }
 594
 595 static int buffer_init(struct vb2_buffer *vb)
 596 {
 597         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 598         struct pwc_frame_buf *buf =
 599                 container_of(vbuf, struct pwc_frame_buf, vb);
 600
 601         /* need vmalloc since frame buffer > 128K */
 602         buf->data = vzalloc(PWC_FRAME_SIZE);
 603         if (buf->data == NULL)
 604                 return -ENOMEM;
 605
 606         return 0;
 607 }
 608
 609 static int buffer_prepare(struct vb2_buffer *vb)
 610 {
 611         struct pwc_device *pdev = vb2_get_drv_priv(vb->vb2_queue);
 612
 613         /* Don't allow queing new buffers after device disconnection */
 614         if (!pdev->udev)
 615                 return -ENODEV;
 616
 617         return 0;
 618 }
 619
 620 static void buffer_finish(struct vb2_buffer *vb)
 621 {
 622         struct pwc_device *pdev = vb2_get_drv_priv(vb->vb2_queue);
 623         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 624         struct pwc_frame_buf *buf =
 625                 container_of(vbuf, struct pwc_frame_buf, vb);
 626
 627         if (vb->state == VB2_BUF_STATE_DONE) {
 628                 /*
 629                  * Application has called dqbuf and is getting back a buffer
 630                  * we've filled, take the pwc data we've stored in buf->data
 631                  * and decompress it into a usable format, storing the result
 632                  * in the vb2_buffer.
 633                  */
 634                 pwc_decompress(pdev, buf);
 635         }
 636 }
 637
 638 static void buffer_cleanup(struct vb2_buffer *vb)
 639 {
 640         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 641         struct pwc_frame_buf *buf =
 642                 container_of(vbuf, struct pwc_frame_buf, vb);
 643
 644         vfree(buf->data);
 645 }
 646
 647 static void buffer_queue(struct vb2_buffer *vb)
 648 {
 649         struct pwc_device *pdev = vb2_get_drv_priv(vb->vb2_queue);
 650         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 651         struct pwc_frame_buf *buf =
 652                 container_of(vbuf, struct pwc_frame_buf, vb);
 653         unsigned long flags = 0;
 654
 655         /* Check the device has not disconnected between prep and queuing */
 656         if (!pdev->udev) {
 657                 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 658                 return;
 659         }
 660
 661         spin_lock_irqsave(&pdev->queued_bufs_lock, flags);
 662         list_add_tail(&buf->list, &pdev->queued_bufs);
 663         spin_unlock_irqrestore(&pdev->queued_bufs_lock, flags);
 664 }
 665
 666 static int start_streaming(struct vb2_queue *vq, unsigned int count)
 667 {
 668         struct pwc_device *pdev = vb2_get_drv_priv(vq);
 669         int r;
 670
 671         if (!pdev->udev)
 672                 return -ENODEV;
 673
 674         if (mutex_lock_interruptible(&pdev->v4l2_lock))
 675                 return -ERESTARTSYS;
 676         /* Turn on camera and set LEDS on */
 677         pwc_camera_power(pdev, 1);
 678         pwc_set_leds(pdev, leds[0], leds[1]);
 679
 680         r = pwc_isoc_init(pdev);
 681         if (r) {
 682                 /* If we failed turn camera and LEDS back off */
 683                 pwc_set_leds(pdev, 0, 0);
 684                 pwc_camera_power(pdev, 0);
 685                 /* And cleanup any queued bufs!! */
 686                 pwc_cleanup_queued_bufs(pdev, VB2_BUF_STATE_QUEUED);
 687         }
 688         mutex_unlock(&pdev->v4l2_lock);
 689
 690         return r;
 691 }
 692
 693 static void stop_streaming(struct vb2_queue *vq)
 694 {
 695         struct pwc_device *pdev = vb2_get_drv_priv(vq);
 696
 697         mutex_lock(&pdev->v4l2_lock);
 698         if (pdev->udev) {
 699                 pwc_set_leds(pdev, 0, 0);
 700                 pwc_camera_power(pdev, 0);
 701                 pwc_isoc_cleanup(pdev);
 702         }
 703
 704         pwc_cleanup_queued_bufs(pdev, VB2_BUF_STATE_ERROR);
 705         if (pdev->fill_buf)
 706                 vb2_buffer_done(&pdev->fill_buf->vb.vb2_buf,
 707                                 VB2_BUF_STATE_ERROR);
 708         mutex_unlock(&pdev->v4l2_lock);
 709 }
 710
 711 static struct vb2_ops pwc_vb_queue_ops = {
 712         .queue_setup            = queue_setup,
 713         .buf_init               = buffer_init,
 714         .buf_prepare            = buffer_prepare,
 715         .buf_finish             = buffer_finish,
 716         .buf_cleanup            = buffer_cleanup,
 717         .buf_queue              = buffer_queue,
 718         .start_streaming        = start_streaming,
 719         .stop_streaming         = stop_streaming,
 720         .wait_prepare           = vb2_ops_wait_prepare,
 721         .wait_finish            = vb2_ops_wait_finish,
 722 };
 723
 724 /***************************************************************************/
 725 /* USB functions */
 726
 727 /* This function gets called when a new device is plugged in or the usb core
 728  * is loaded.
 729  */
 730
 731 static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id *id)
 732 {
 733         struct usb_device *udev = interface_to_usbdev(intf);
 734         struct pwc_device *pdev = NULL;
 735         int vendor_id, product_id, type_id;
 736         int rc;
 737         int features = 0;
 738         int compression = 0;
 739         int my_power_save = power_save;
 740         char serial_number[30], *name;
 741
 742         vendor_id = le16_to_cpu(udev->descriptor.idVendor);
 743         product_id = le16_to_cpu(udev->descriptor.idProduct);
 744
 745         /* Check if we can handle this device */
 746         PWC_DEBUG_PROBE("probe() called [%04X %04X], if %d\n",
 747                 vendor_id, product_id,
 748                 intf->altsetting->desc.bInterfaceNumber);
 749
 750         /* the interfaces are probed one by one. We are only interested in the
 751            video interface (0) now.
 752            Interface 1 is the Audio Control, and interface 2 Audio itself.
 753          */
 754         if (intf->altsetting->desc.bInterfaceNumber > 0)
 755                 return -ENODEV;
 756
 757         if (vendor_id == 0x0471) {
 758                 switch (product_id) {
 759                 case 0x0302:
 760                         PWC_INFO("Philips PCA645VC USB webcam detected.\n");
 761                         name = "Philips 645 webcam";
 762                         type_id = 645;
 763                         break;
 764                 case 0x0303:
 765                         PWC_INFO("Philips PCA646VC USB webcam detected.\n");
 766                         name = "Philips 646 webcam";
 767                         type_id = 646;
 768                         break;
 769                 case 0x0304:
 770                         PWC_INFO("Askey VC010 type 2 USB webcam detected.\n");
 771                         name = "Askey VC010 webcam";
 772                         type_id = 646;
 773                         break;
 774                 case 0x0307:
 775                         PWC_INFO("Philips PCVC675K (Vesta) USB webcam detected.\n");
 776                         name = "Philips 675 webcam";
 777                         type_id = 675;
 778                         break;
 779                 case 0x0308:
 780                         PWC_INFO("Philips PCVC680K (Vesta Pro) USB webcam detected.\n");
 781                         name = "Philips 680 webcam";
 782                         type_id = 680;
 783                         break;
 784                 case 0x030C:
 785                         PWC_INFO("Philips PCVC690K (Vesta Pro Scan) USB webcam detected.\n");
 786                         name = "Philips 690 webcam";
 787                         type_id = 690;
 788                         break;
 789                 case 0x0310:
 790                         PWC_INFO("Philips PCVC730K (ToUCam Fun)/PCVC830 (ToUCam II) USB webcam detected.\n");
 791                         name = "Philips 730 webcam";
 792                         type_id = 730;
 793                         break;
 794                 case 0x0311:
 795                         PWC_INFO("Philips PCVC740K (ToUCam Pro)/PCVC840 (ToUCam II) USB webcam detected.\n");
 796                         name = "Philips 740 webcam";
 797                         type_id = 740;
 798                         break;
 799                 case 0x0312:
 800                         PWC_INFO("Philips PCVC750K (ToUCam Pro Scan) USB webcam detected.\n");
 801                         name = "Philips 750 webcam";
 802                         type_id = 750;
 803                         break;
 804                 case 0x0313:
 805                         PWC_INFO("Philips PCVC720K/40 (ToUCam XS) USB webcam detected.\n");
 806                         name = "Philips 720K/40 webcam";
 807                         type_id = 720;
 808                         break;
 809                 case 0x0329:
 810                         PWC_INFO("Philips SPC 900NC USB webcam detected.\n");
 811                         name = "Philips SPC 900NC webcam";
 812                         type_id = 740;
 813                         break;
 814                 default:
 815                         return -ENODEV;
 816                         break;
 817                 }
 818         }
 819         else if (vendor_id == 0x069A) {
 820                 switch(product_id) {
 821                 case 0x0001:
 822                         PWC_INFO("Askey VC010 type 1 USB webcam detected.\n");
 823                         name = "Askey VC010 webcam";
 824                         type_id = 645;
 825                         break;
 826                 default:
 827                         return -ENODEV;
 828                         break;
 829                 }
 830         }
 831         else if (vendor_id == 0x046d) {
 832                 switch(product_id) {
 833                 case 0x08b0:
 834                         PWC_INFO("Logitech QuickCam Pro 3000 USB webcam detected.\n");
 835                         name = "Logitech QuickCam Pro 3000";
 836                         type_id = 740; /* CCD sensor */
 837                         break;
 838                 case 0x08b1:
 839                         PWC_INFO("Logitech QuickCam Notebook Pro USB webcam detected.\n");
 840                         name = "Logitech QuickCam Notebook Pro";
 841                         type_id = 740; /* CCD sensor */
 842                         break;
 843                 case 0x08b2:
 844                         PWC_INFO("Logitech QuickCam 4000 Pro USB webcam detected.\n");
 845                         name = "Logitech QuickCam Pro 4000";
 846                         type_id = 740; /* CCD sensor */
 847                         if (my_power_save == -1)
 848                                 my_power_save = 1;
 849                         break;
 850                 case 0x08b3:
 851                         PWC_INFO("Logitech QuickCam Zoom USB webcam detected.\n");
 852                         name = "Logitech QuickCam Zoom";
 853                         type_id = 740; /* CCD sensor */
 854                         break;
 855                 case 0x08B4:
 856                         PWC_INFO("Logitech QuickCam Zoom (new model) USB webcam detected.\n");
 857                         name = "Logitech QuickCam Zoom";
 858                         type_id = 740; /* CCD sensor */
 859                         if (my_power_save == -1)
 860                                 my_power_save = 1;
 861                         break;
 862                 case 0x08b5:
 863                         PWC_INFO("Logitech QuickCam Orbit/Sphere USB webcam detected.\n");
 864                         name = "Logitech QuickCam Orbit";
 865                         type_id = 740; /* CCD sensor */
 866                         if (my_power_save == -1)
 867                                 my_power_save = 1;
 868                         features |= FEATURE_MOTOR_PANTILT;
 869                         break;
 870                 case 0x08b6:
 871                         PWC_INFO("Logitech/Cisco VT Camera webcam detected.\n");
 872                         name = "Cisco VT Camera";
 873                         type_id = 740; /* CCD sensor */
 874                         break;
 875                 case 0x08b7:
 876                         PWC_INFO("Logitech ViewPort AV 100 webcam detected.\n");
 877                         name = "Logitech ViewPort AV 100";
 878                         type_id = 740; /* CCD sensor */
 879                         break;
 880                 case 0x08b8: /* Where this released? */
 881                         PWC_INFO("Logitech QuickCam detected (reserved ID).\n");
 882                         name = "Logitech QuickCam (res.)";
 883                         type_id = 730; /* Assuming CMOS */
 884                         break;
 885                 default:
 886                         return -ENODEV;
 887                         break;
 888                 }
 889         }
 890         else if (vendor_id == 0x055d) {
 891                 /* I don't know the difference between the C10 and the C30;
 892                    I suppose the difference is the sensor, but both cameras
 893                    work equally well with a type_id of 675
 894                  */
 895                 switch(product_id) {
 896                 case 0x9000:
 897                         PWC_INFO("Samsung MPC-C10 USB webcam detected.\n");
 898                         name = "Samsung MPC-C10";
 899                         type_id = 675;
 900                         break;
 901                 case 0x9001:
 902                         PWC_INFO("Samsung MPC-C30 USB webcam detected.\n");
 903                         name = "Samsung MPC-C30";
 904                         type_id = 675;
 905                         break;
 906                 case 0x9002:
 907                         PWC_INFO("Samsung SNC-35E (v3.0) USB webcam detected.\n");
 908                         name = "Samsung MPC-C30";
 909                         type_id = 740;
 910                         break;
 911                 default:
 912                         return -ENODEV;
 913                         break;
 914                 }
 915         }
 916         else if (vendor_id == 0x041e) {
 917                 switch(product_id) {
 918                 case 0x400c:
 919                         PWC_INFO("Creative Labs Webcam 5 detected.\n");
 920                         name = "Creative Labs Webcam 5";
 921                         type_id = 730;
 922                         if (my_power_save == -1)
 923                                 my_power_save = 1;
 924                         break;
 925                 case 0x4011:
 926                         PWC_INFO("Creative Labs Webcam Pro Ex detected.\n");
 927                         name = "Creative Labs Webcam Pro Ex";
 928                         type_id = 740;
 929                         break;
 930                 default:
 931                         return -ENODEV;
 932                         break;
 933                 }
 934         }
 935         else if (vendor_id == 0x04cc) {
 936                 switch(product_id) {
 937                 case 0x8116:
 938                         PWC_INFO("Sotec Afina Eye USB webcam detected.\n");
 939                         name = "Sotec Afina Eye";
 940                         type_id = 730;
 941                         break;
 942                 default:
 943                         return -ENODEV;
 944                         break;
 945                 }
 946         }
 947         else if (vendor_id == 0x06be) {
 948                 switch(product_id) {
 949                 case 0x8116:
 950                         /* This is essentially the same cam as the Sotec Afina Eye */
 951                         PWC_INFO("AME Co. Afina Eye USB webcam detected.\n");
 952                         name = "AME Co. Afina Eye";
 953                         type_id = 750;
 954                         break;
 955                 default:
 956                         return -ENODEV;
 957                         break;
 958                 }
 959
 960         }
 961         else if (vendor_id == 0x0d81) {
 962                 switch(product_id) {
 963                 case 0x1900:
 964                         PWC_INFO("Visionite VCS-UC300 USB webcam detected.\n");
 965                         name = "Visionite VCS-UC300";
 966                         type_id = 740; /* CCD sensor */
 967                         break;
 968                 case 0x1910:
 969                         PWC_INFO("Visionite VCS-UM100 USB webcam detected.\n");
 970                         name = "Visionite VCS-UM100";
 971                         type_id = 730; /* CMOS sensor */
 972                         break;
 973                 default:
 974                         return -ENODEV;
 975                         break;
 976                 }
 977         }
 978         else
 979                 return -ENODEV; /* Not any of the know types; but the list keeps growing. */
 980
 981         if (my_power_save == -1)
 982                 my_power_save = 0;
 983
 984         memset(serial_number, 0, 30);
 985         usb_string(udev, udev->descriptor.iSerialNumber, serial_number, 29);
 986         PWC_DEBUG_PROBE("Device serial number is %s\n", serial_number);
 987
 988         if (udev->descriptor.bNumConfigurations > 1)
 989                 PWC_WARNING("Warning: more than 1 configuration available.\n");
 990
 991         /* Allocate structure, initialize pointers, mutexes, etc. and link it to the usb_device */
 992         pdev = kzalloc(sizeof(struct pwc_device), GFP_KERNEL);
 993         if (pdev == NULL) {
 994                 PWC_ERROR("Oops, could not allocate memory for pwc_device.\n");
 995                 return -ENOMEM;
 996         }
 997         pdev->type = type_id;
 998         pdev->features = features;
 999         pwc_construct(pdev); /* set min/max sizes correct */
1000
1001         mutex_init(&pdev->v4l2_lock);
1002         mutex_init(&pdev->vb_queue_lock);
1003         spin_lock_init(&pdev->queued_bufs_lock);
1004         INIT_LIST_HEAD(&pdev->queued_bufs);
1005
1006         pdev->udev = udev;
1007         pdev->power_save = my_power_save;
1008
1009         /* Init videobuf2 queue structure */
1010         pdev->vb_queue.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1011         pdev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1012         pdev->vb_queue.drv_priv = pdev;
1013         pdev->vb_queue.buf_struct_size = sizeof(struct pwc_frame_buf);
1014         pdev->vb_queue.ops = &pwc_vb_queue_ops;
1015         pdev->vb_queue.mem_ops = &vb2_vmalloc_memops;
1016         pdev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1017         rc = vb2_queue_init(&pdev->vb_queue);
1018         if (rc < 0) {
1019                 PWC_ERROR("Oops, could not initialize vb2 queue.\n");
1020                 goto err_free_mem;
1021         }
1022
1023         /* Init video_device structure */
1024         pdev->vdev = pwc_template;
1025         strcpy(pdev->vdev.name, name);
1026         pdev->vdev.queue = &pdev->vb_queue;
1027         pdev->vdev.queue->lock = &pdev->vb_queue_lock;
1028         video_set_drvdata(&pdev->vdev, pdev);
1029
1030         pdev->release = le16_to_cpu(udev->descriptor.bcdDevice);
1031         PWC_DEBUG_PROBE("Release: %04x\n", pdev->release);
1032
1033         /* Allocate USB command buffers */
1034         pdev->ctrl_buf = kmalloc(sizeof(pdev->cmd_buf), GFP_KERNEL);
1035         if (!pdev->ctrl_buf) {
1036                 PWC_ERROR("Oops, could not allocate memory for pwc_device.\n");
1037                 rc = -ENOMEM;
1038                 goto err_free_mem;
1039         }
1040
1041 #ifdef CONFIG_USB_PWC_DEBUG
1042         /* Query sensor type */
1043         if (pwc_get_cmos_sensor(pdev, &rc) >= 0) {
1044                 PWC_DEBUG_OPEN("This %s camera is equipped with a %s (%d).\n",
1045                                 pdev->vdev.name,
1046                                 pwc_sensor_type_to_string(rc), rc);
1047         }
1048 #endif
1049
1050         /* Set the leds off */
1051         pwc_set_leds(pdev, 0, 0);
1052
1053         /* Setup initial videomode */
1054         rc = pwc_set_video_mode(pdev, MAX_WIDTH, MAX_HEIGHT,
1055                                 V4L2_PIX_FMT_YUV420, 30, &compression, 1);
1056         if (rc)
1057                 goto err_free_mem;
1058
1059         /* Register controls (and read default values from camera */
1060         rc = pwc_init_controls(pdev);
1061         if (rc) {
1062                 PWC_ERROR("Failed to register v4l2 controls (%d).\n", rc);
1063                 goto err_free_mem;
1064         }
1065
1066         /* And powerdown the camera until streaming starts */
1067         pwc_camera_power(pdev, 0);
1068
1069         /* Register the v4l2_device structure */
1070         pdev->v4l2_dev.release = pwc_video_release;
1071         rc = v4l2_device_register(&intf->dev, &pdev->v4l2_dev);
1072         if (rc) {
1073                 PWC_ERROR("Failed to register v4l2-device (%d).\n", rc);
1074                 goto err_free_controls;
1075         }
1076
1077         pdev->v4l2_dev.ctrl_handler = &pdev->ctrl_handler;
1078         pdev->vdev.v4l2_dev = &pdev->v4l2_dev;
1079         pdev->vdev.lock = &pdev->v4l2_lock;
1080
1081         rc = video_register_device(&pdev->vdev, VFL_TYPE_GRABBER, -1);
1082         if (rc < 0) {
1083                 PWC_ERROR("Failed to register as video device (%d).\n", rc);
1084                 goto err_unregister_v4l2_dev;
1085         }
1086         PWC_INFO("Registered as %s.\n", video_device_node_name(&pdev->vdev));
1087
1088 #ifdef CONFIG_USB_PWC_INPUT_EVDEV
1089         /* register webcam snapshot button input device */
1090         pdev->button_dev = input_allocate_device();
1091         if (!pdev->button_dev) {
1092                 rc = -ENOMEM;
1093                 goto err_video_unreg;
1094         }
1095
1096         usb_make_path(udev, pdev->button_phys, sizeof(pdev->button_phys));
1097         strlcat(pdev->button_phys, "/input0", sizeof(pdev->button_phys));
1098
1099         pdev->button_dev->name = "PWC snapshot button";
1100         pdev->button_dev->phys = pdev->button_phys;
1101         usb_to_input_id(pdev->udev, &pdev->button_dev->id);
1102         pdev->button_dev->dev.parent = &pdev->udev->dev;
1103         pdev->button_dev->evbit[0] = BIT_MASK(EV_KEY);
1104         pdev->button_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
1105
1106         rc = input_register_device(pdev->button_dev);
1107         if (rc) {
1108                 input_free_device(pdev->button_dev);
1109                 pdev->button_dev = NULL;
1110                 goto err_video_unreg;
1111         }
1112 #endif
1113
1114         return 0;
1115
1116 err_video_unreg:
1117         video_unregister_device(&pdev->vdev);
1118 err_unregister_v4l2_dev:
1119         v4l2_device_unregister(&pdev->v4l2_dev);
1120 err_free_controls:
1121         v4l2_ctrl_handler_free(&pdev->ctrl_handler);
1122 err_free_mem:
1123         kfree(pdev->ctrl_buf);
1124         kfree(pdev);
1125         return rc;
1126 }
1127
1128 /* The user yanked out the cable... */
1129 static void usb_pwc_disconnect(struct usb_interface *intf)
1130 {
1131         struct v4l2_device *v = usb_get_intfdata(intf);
1132         struct pwc_device *pdev = container_of(v, struct pwc_device, v4l2_dev);
1133
1134         mutex_lock(&pdev->vb_queue_lock);
1135         mutex_lock(&pdev->v4l2_lock);
1136         /* No need to keep the urbs around after disconnection */
1137         if (pdev->vb_queue.streaming)
1138                 pwc_isoc_cleanup(pdev);
1139         pdev->udev = NULL;
1140
1141         v4l2_device_disconnect(&pdev->v4l2_dev);
1142         video_unregister_device(&pdev->vdev);
1143         mutex_unlock(&pdev->v4l2_lock);
1144         mutex_unlock(&pdev->vb_queue_lock);
1145
1146 #ifdef CONFIG_USB_PWC_INPUT_EVDEV
1147         if (pdev->button_dev)
1148                 input_unregister_device(pdev->button_dev);
1149 #endif
1150
1151         v4l2_device_put(&pdev->v4l2_dev);
1152 }
1153
1154
1155 /*
1156  * Initialization code & module stuff
1157  */
1158
1159 static unsigned int leds_nargs;
1160
1161 #ifdef CONFIG_USB_PWC_DEBUG
1162 module_param_named(trace, pwc_trace, int, 0644);
1163 #endif
1164 module_param(power_save, int, 0644);
1165 module_param_array(leds, int, &leds_nargs, 0444);
1166
1167 #ifdef CONFIG_USB_PWC_DEBUG
1168 MODULE_PARM_DESC(trace, "For debugging purposes");
1169 #endif
1170 MODULE_PARM_DESC(power_save, "Turn power saving for new cameras on or off");
1171 MODULE_PARM_DESC(leds, "LED on,off time in milliseconds");
1172
1173 MODULE_DESCRIPTION("Philips & OEM USB webcam driver");
1174 MODULE_AUTHOR("Luc Saillard <luc@saillard.org>");
1175 MODULE_LICENSE("GPL");
1176 MODULE_ALIAS("pwcx");
1177 MODULE_VERSION( PWC_VERSION );
1178
1179 module_usb_driver(pwc_driver);