drivers/media/video/usbvideo/quickcam_messenger.c

   1 /*
   2  * Driver for Logitech Quickcam Messenger usb video camera
   3  * Copyright (C) Jaya Kumar
   4  *
   5  * This work was sponsored by CIS(M) Sdn Bhd.
   6  * History:
   7  * 05/08/2006 - Jaya Kumar
   8  * I wrote this based on the konicawc by Simon Evans.
   9  * -
  10  * Full credit for reverse engineering and creating an initial
  11  * working linux driver for the VV6422 goes to the qce-ga project by
  12  * Tuukka Toivonen, Jochen Hoenicke, Peter McConnell,
  13  * Cristiano De Michele, Georg Acher, Jean-Frederic Clere as well as
  14  * others.
  15  * ---
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation; either version 2 of the License, or
  19  * (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  29  *
  30  */
  31
  32 #include <linux/kernel.h>
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35 #include <linux/input.h>
  36 #include <linux/usb/input.h>
  37 #include <linux/slab.h>
  38
  39 #include "usbvideo.h"
  40 #include "quickcam_messenger.h"
  41
  42 /*
  43  * Version Information
  44  */
  45
  46 #ifdef CONFIG_USB_DEBUG
  47 static int debug;
  48 #define DEBUG(n, format, arg...) \
  49         if (n <= debug) {        \
  50                 printk(KERN_DEBUG __FILE__ ":%s(): " format "\n", __func__ , ## arg); \
  51         }
  52 #else
  53 #define DEBUG(n, arg...)
  54 static const int debug;
  55 #endif
  56
  57 #define DRIVER_VERSION "v0.01"
  58 #define DRIVER_DESC "Logitech Quickcam Messenger USB"
  59
  60 #define USB_LOGITECH_VENDOR_ID  0x046D
  61 #define USB_QCM_PRODUCT_ID      0x08F0
  62
  63 #define MAX_CAMERAS     1
  64
  65 #define MAX_COLOUR      32768
  66 #define MAX_HUE         32768
  67 #define MAX_BRIGHTNESS  32768
  68 #define MAX_CONTRAST    32768
  69 #define MAX_WHITENESS   32768
  70
  71 static int size = SIZE_320X240;
  72 static int colour = MAX_COLOUR;
  73 static int hue = MAX_HUE;
  74 static int brightness = MAX_BRIGHTNESS;
  75 static int contrast =   MAX_CONTRAST;
  76 static int whiteness =  MAX_WHITENESS;
  77
  78 static struct usbvideo *cams;
  79
  80 static struct usb_device_id qcm_table [] = {
  81         { USB_DEVICE(USB_LOGITECH_VENDOR_ID, USB_QCM_PRODUCT_ID) },
  82         { }
  83 };
  84 MODULE_DEVICE_TABLE(usb, qcm_table);
  85
  86 #ifdef CONFIG_INPUT
  87 static void qcm_register_input(struct qcm *cam, struct usb_device *dev)
  88 {
  89         struct input_dev *input_dev;
  90         int error;
  91
  92         usb_make_path(dev, cam->input_physname, sizeof(cam->input_physname));
  93         strlcat(cam->input_physname, "/input0", sizeof(cam->input_physname));
  94
  95         cam->input = input_dev = input_allocate_device();
  96         if (!input_dev) {
  97                 dev_warn(&dev->dev, "insufficient mem for cam input device\n");
  98                 return;
  99         }
 100
 101         input_dev->name = "QCM button";
 102         input_dev->phys = cam->input_physname;
 103         usb_to_input_id(dev, &input_dev->id);
 104         input_dev->dev.parent = &dev->dev;
 105
 106         input_dev->evbit[0] = BIT_MASK(EV_KEY);
 107         input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
 108
 109         error = input_register_device(cam->input);
 110         if (error) {
 111                 dev_warn(&dev->dev,
 112                          "Failed to register camera's input device, err: %d\n",
 113                          error);
 114                 input_free_device(cam->input);
 115                 cam->input = NULL;
 116         }
 117 }
 118
 119 static void qcm_unregister_input(struct qcm *cam)
 120 {
 121         if (cam->input) {
 122                 input_unregister_device(cam->input);
 123                 cam->input = NULL;
 124         }
 125 }
 126
 127 static void qcm_report_buttonstat(struct qcm *cam)
 128 {
 129         if (cam->input) {
 130                 input_report_key(cam->input, KEY_CAMERA, cam->button_sts);
 131                 input_sync(cam->input);
 132         }
 133 }
 134
 135 static void qcm_int_irq(struct urb *urb)
 136 {
 137         int ret;
 138         struct uvd *uvd = urb->context;
 139         struct qcm *cam;
 140
 141         if (!CAMERA_IS_OPERATIONAL(uvd))
 142                 return;
 143
 144         if (!uvd->streaming)
 145                 return;
 146
 147         uvd->stats.urb_count++;
 148
 149         if (urb->status < 0)
 150                 uvd->stats.iso_err_count++;
 151         else {
 152                 if (urb->actual_length > 0 ) {
 153                         cam = (struct qcm *) uvd->user_data;
 154                         if (cam->button_sts_buf == 0x88)
 155                                 cam->button_sts = 0x0;
 156                         else if (cam->button_sts_buf == 0x80)
 157                                 cam->button_sts = 0x1;
 158                         qcm_report_buttonstat(cam);
 159                 }
 160         }
 161
 162         ret = usb_submit_urb(urb, GFP_ATOMIC);
 163         if (ret < 0)
 164                 err("usb_submit_urb error (%d)", ret);
 165 }
 166
 167 static int qcm_setup_input_int(struct qcm *cam, struct uvd *uvd)
 168 {
 169         int errflag;
 170         usb_fill_int_urb(cam->button_urb, uvd->dev,
 171                         usb_rcvintpipe(uvd->dev, uvd->video_endp + 1),
 172                         &cam->button_sts_buf,
 173                         1,
 174                         qcm_int_irq,
 175                         uvd, 16);
 176
 177         errflag = usb_submit_urb(cam->button_urb, GFP_KERNEL);
 178         if (errflag)
 179                 err ("usb_submit_int ret %d", errflag);
 180         return errflag;
 181 }
 182
 183 static void qcm_stop_int_data(struct qcm *cam)
 184 {
 185         usb_kill_urb(cam->button_urb);
 186 }
 187
 188 static int qcm_alloc_int_urb(struct qcm *cam)
 189 {
 190         cam->button_urb = usb_alloc_urb(0, GFP_KERNEL);
 191
 192         if (!cam->button_urb)
 193                 return -ENOMEM;
 194
 195         return 0;
 196 }
 197
 198 static void qcm_free_int(struct qcm *cam)
 199 {
 200         usb_free_urb(cam->button_urb);
 201 }
 202 #endif /* CONFIG_INPUT */
 203
 204 static int qcm_stv_setb(struct usb_device *dev, u16 reg, u8 val)
 205 {
 206         int ret;
 207
 208         /* we'll wait up to 3 slices but no more */
 209         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 210                 0x04, USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 211                 reg, 0, &val, 1, 3*HZ);
 212         return ret;
 213 }
 214
 215 static int qcm_stv_setw(struct usb_device *dev, u16 reg, __le16 val)
 216 {
 217         int ret;
 218
 219         /* we'll wait up to 3 slices but no more */
 220         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 221                 0x04, USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 222                 reg, 0, &val, 2, 3*HZ);
 223         return ret;
 224 }
 225
 226 static int qcm_stv_getw(struct usb_device *dev, unsigned short reg,
 227                                                         __le16 *val)
 228 {
 229         int ret;
 230
 231         /* we'll wait up to 3 slices but no more */
 232         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 233                 0x04, USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
 234                 reg, 0, val, 2, 3*HZ);
 235         return ret;
 236 }
 237
 238 static int qcm_camera_on(struct uvd *uvd)
 239 {
 240         int ret;
 241         CHECK_RET(ret, qcm_stv_setb(uvd->dev, STV_ISO_ENABLE, 0x01));
 242         return 0;
 243 }
 244
 245 static int qcm_camera_off(struct uvd *uvd)
 246 {
 247         int ret;
 248         CHECK_RET(ret, qcm_stv_setb(uvd->dev, STV_ISO_ENABLE, 0x00));
 249         return 0;
 250 }
 251
 252 static void qcm_hsv2rgb(u16 hue, u16 sat, u16 val, u16 *r, u16 *g, u16 *b)
 253 {
 254         unsigned int segment, valsat;
 255         signed int   h = (signed int) hue;
 256         unsigned int s = (sat - 32768) * 2;     /* rescale */
 257         unsigned int v = val;
 258         unsigned int p;
 259
 260         /*
 261         the registers controlling gain are 8 bit of which
 262         we affect only the last 4 bits with our gain.
 263         we know that if saturation is 0, (unsaturated) then
 264         we're grayscale (center axis of the colour cone) so
 265         we set rgb=value. we use a formula obtained from
 266         wikipedia to map the cone to the RGB plane. it's
 267         as follows for the human value case of h=0..360,
 268         s=0..1, v=0..1
 269         h_i = h/60 % 6 , f = h/60 - h_i , p = v(1-s)
 270         q = v(1 - f*s) , t = v(1 - (1-f)s)
 271         h_i==0 => r=v , g=t, b=p
 272         h_i==1 => r=q , g=v, b=p
 273         h_i==2 => r=p , g=v, b=t
 274         h_i==3 => r=p , g=q, b=v
 275         h_i==4 => r=t , g=p, b=v
 276         h_i==5 => r=v , g=p, b=q
 277         the bottom side (the point) and the stuff just up
 278         of that is black so we simplify those two cases.
 279         */
 280         if (sat < 32768) {
 281                 /* anything less than this is unsaturated */
 282                 *r = val;
 283                 *g = val;
 284                 *b = val;
 285                 return;
 286         }
 287         if (val <= (0xFFFF/8)) {
 288                 /* anything less than this is black */
 289                 *r = 0;
 290                 *g = 0;
 291                 *b = 0;
 292                 return;
 293         }
 294
 295         /* the rest of this code is copying tukkat's
 296         implementation of the hsv2rgb conversion as taken
 297         from qc-usb-messenger code. the 10923 is 0xFFFF/6
 298         to divide the cone into 6 sectors.  */
 299
 300         segment = (h + 10923) & 0xFFFF;
 301         segment = segment*3 >> 16;              /* 0..2: 0=R, 1=G, 2=B */
 302         hue -= segment * 21845;                 /* -10923..10923 */
 303         h = hue;
 304         h *= 3;
 305         valsat = v*s >> 16;                     /* 0..65534 */
 306         p = v - valsat;
 307         if (h >= 0) {
 308                 unsigned int t = v - (valsat * (32769 - h) >> 15);
 309                 switch (segment) {
 310                 case 0: /* R-> */
 311                         *r = v;
 312                         *g = t;
 313                         *b = p;
 314                         break;
 315                 case 1: /* G-> */
 316                         *r = p;
 317                         *g = v;
 318                         *b = t;
 319                         break;
 320                 case 2: /* B-> */
 321                         *r = t;
 322                         *g = p;
 323                         *b = v;
 324                         break;
 325                 }
 326         } else {
 327                 unsigned int q = v - (valsat * (32769 + h) >> 15);
 328                 switch (segment) {
 329                 case 0: /* ->R */
 330                         *r = v;
 331                         *g = p;
 332                         *b = q;
 333                         break;
 334                 case 1: /* ->G */
 335                         *r = q;
 336                         *g = v;
 337                         *b = p;
 338                         break;
 339                 case 2: /* ->B */
 340                         *r = p;
 341                         *g = q;
 342                         *b = v;
 343                         break;
 344                 }
 345         }
 346 }
 347
 348 static int qcm_sensor_set_gains(struct uvd *uvd, u16 hue,
 349         u16 saturation, u16 value)
 350 {
 351         int ret;
 352         u16 r=0,g=0,b=0;
 353
 354         /* this code is based on qc-usb-messenger */
 355         qcm_hsv2rgb(hue, saturation, value, &r, &g, &b);
 356
 357         r >>= 12;
 358         g >>= 12;
 359         b >>= 12;
 360
 361         /* min val is 8 */
 362         r = max((u16) 8, r);
 363         g = max((u16) 8, g);
 364         b = max((u16) 8, b);
 365
 366         r |= 0x30;
 367         g |= 0x30;
 368         b |= 0x30;
 369
 370         /* set the r,g,b gain registers */
 371         CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x0509, r));
 372         CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x050A, g));
 373         CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x050B, b));
 374
 375         /* doing as qc-usb did */
 376         CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x050C, 0x2A));
 377         CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x050D, 0x01));
 378         CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x143F, 0x01));
 379
 380         return 0;
 381 }
 382
 383 static int qcm_sensor_set_exposure(struct uvd *uvd, int exposure)
 384 {
 385         int ret;
 386         int formedval;
 387
 388         /* calculation was from qc-usb-messenger driver */
 389         formedval = ( exposure >> 12 );
 390
 391         /* max value for formedval is 14 */
 392         formedval = min(formedval, 14);
 393
 394         CHECK_RET(ret, qcm_stv_setb(uvd->dev,
 395                         0x143A, 0xF0 | formedval));
 396         CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x143F, 0x01));
 397         return 0;
 398 }
 399
 400 static int qcm_sensor_setlevels(struct uvd *uvd, int brightness, int contrast,
 401                                         int hue, int colour)
 402 {
 403         int ret;
 404         /* brightness is exposure, contrast is gain, colour is saturation */
 405         CHECK_RET(ret,
 406                 qcm_sensor_set_exposure(uvd, brightness));
 407         CHECK_RET(ret, qcm_sensor_set_gains(uvd, hue, colour, contrast));
 408
 409         return 0;
 410 }
 411
 412 static int qcm_sensor_setsize(struct uvd *uvd, u8 size)
 413 {
 414         int ret;
 415
 416         CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x1505, size));
 417         return 0;
 418 }
 419
 420 static int qcm_sensor_set_shutter(struct uvd *uvd, int whiteness)
 421 {
 422         int ret;
 423         /* some rescaling as done by the qc-usb-messenger code */
 424         if (whiteness > 0xC000)
 425                 whiteness = 0xC000 + (whiteness & 0x3FFF)*8;
 426
 427         CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x143D,
 428                                 (whiteness >> 8) & 0xFF));
 429         CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x143E,
 430                                 (whiteness >> 16) & 0x03));
 431         CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x143F, 0x01));
 432
 433         return 0;
 434 }
 435
 436 static int qcm_sensor_init(struct uvd *uvd)
 437 {
 438         struct qcm *cam = (struct qcm *) uvd->user_data;
 439         int ret;
 440         int i;
 441
 442         for (i=0; i < ARRAY_SIZE(regval_table) ; i++) {
 443                 CHECK_RET(ret, qcm_stv_setb(uvd->dev,
 444                                         regval_table[i].reg,
 445                                         regval_table[i].val));
 446         }
 447
 448         CHECK_RET(ret, qcm_stv_setw(uvd->dev, 0x15c1,
 449                                 cpu_to_le16(ISOC_PACKET_SIZE)));
 450         CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x15c3, 0x08));
 451         CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x143f, 0x01));
 452
 453         CHECK_RET(ret, qcm_stv_setb(uvd->dev, STV_ISO_ENABLE, 0x00));
 454
 455         CHECK_RET(ret, qcm_sensor_setsize(uvd, camera_sizes[cam->size].cmd));
 456
 457         CHECK_RET(ret, qcm_sensor_setlevels(uvd, uvd->vpic.brightness,
 458                         uvd->vpic.contrast, uvd->vpic.hue, uvd->vpic.colour));
 459
 460         CHECK_RET(ret, qcm_sensor_set_shutter(uvd, uvd->vpic.whiteness));
 461         CHECK_RET(ret, qcm_sensor_setsize(uvd, camera_sizes[cam->size].cmd));
 462
 463         return 0;
 464 }
 465
 466 static int qcm_set_camera_size(struct uvd *uvd)
 467 {
 468         int ret;
 469         struct qcm *cam = (struct qcm *) uvd->user_data;
 470
 471         CHECK_RET(ret, qcm_sensor_setsize(uvd, camera_sizes[cam->size].cmd));
 472         cam->width = camera_sizes[cam->size].width;
 473         cam->height = camera_sizes[cam->size].height;
 474         uvd->videosize = VIDEOSIZE(cam->width, cam->height);
 475
 476         return 0;
 477 }
 478
 479 static int qcm_setup_on_open(struct uvd *uvd)
 480 {
 481         int ret;
 482
 483         CHECK_RET(ret, qcm_sensor_set_gains(uvd, uvd->vpic.hue,
 484                                 uvd->vpic.colour, uvd->vpic.contrast));
 485         CHECK_RET(ret, qcm_sensor_set_exposure(uvd, uvd->vpic.brightness));
 486         CHECK_RET(ret, qcm_sensor_set_shutter(uvd, uvd->vpic.whiteness));
 487         CHECK_RET(ret, qcm_set_camera_size(uvd));
 488         CHECK_RET(ret, qcm_camera_on(uvd));
 489         return 0;
 490 }
 491
 492 static void qcm_adjust_picture(struct uvd *uvd)
 493 {
 494         int ret;
 495         struct qcm *cam = (struct qcm *) uvd->user_data;
 496
 497         ret = qcm_camera_off(uvd);
 498         if (ret) {
 499                 err("can't turn camera off. abandoning pic adjustment");
 500                 return;
 501         }
 502
 503         /* if there's been a change in contrast, hue, or
 504         colour then we need to recalculate hsv in order
 505         to update gains */
 506         if ((cam->contrast != uvd->vpic.contrast) ||
 507                 (cam->hue != uvd->vpic.hue) ||
 508                 (cam->colour != uvd->vpic.colour)) {
 509                 cam->contrast = uvd->vpic.contrast;
 510                 cam->hue = uvd->vpic.hue;
 511                 cam->colour = uvd->vpic.colour;
 512                 ret = qcm_sensor_set_gains(uvd, cam->hue, cam->colour,
 513                                                 cam->contrast);
 514                 if (ret) {
 515                         err("can't set gains. abandoning pic adjustment");
 516                         return;
 517                 }
 518         }
 519
 520         if (cam->brightness != uvd->vpic.brightness) {
 521                 cam->brightness = uvd->vpic.brightness;
 522                 ret = qcm_sensor_set_exposure(uvd, cam->brightness);
 523                 if (ret) {
 524                         err("can't set exposure. abandoning pic adjustment");
 525                         return;
 526                 }
 527         }
 528
 529         if (cam->whiteness != uvd->vpic.whiteness) {
 530                 cam->whiteness = uvd->vpic.whiteness;
 531                 qcm_sensor_set_shutter(uvd, cam->whiteness);
 532                 if (ret) {
 533                         err("can't set shutter. abandoning pic adjustment");
 534                         return;
 535                 }
 536         }
 537
 538         ret = qcm_camera_on(uvd);
 539         if (ret) {
 540                 err("can't reenable camera. pic adjustment failed");
 541                 return;
 542         }
 543 }
 544
 545 static int qcm_process_frame(struct uvd *uvd, u8 *cdata, int framelen)
 546 {
 547         int datalen;
 548         int totaldata;
 549         struct framehdr {
 550                 __be16 id;
 551                 __be16 len;
 552         };
 553         struct framehdr *fhdr;
 554
 555         totaldata = 0;
 556         while (framelen) {
 557                 fhdr = (struct framehdr *) cdata;
 558                 datalen = be16_to_cpu(fhdr->len);
 559                 framelen -= 4;
 560                 cdata += 4;
 561
 562                 if ((fhdr->id) == cpu_to_be16(0x8001)) {
 563                         RingQueue_Enqueue(&uvd->dp, marker, 4);
 564                         totaldata += 4;
 565                         continue;
 566                 }
 567                 if ((fhdr->id & cpu_to_be16(0xFF00)) == cpu_to_be16(0x0200)) {
 568                         RingQueue_Enqueue(&uvd->dp, cdata, datalen);
 569                         totaldata += datalen;
 570                 }
 571                 framelen -= datalen;
 572                 cdata += datalen;
 573         }
 574         return totaldata;
 575 }
 576
 577 static int qcm_compress_iso(struct uvd *uvd, struct urb *dataurb)
 578 {
 579         int totlen;
 580         int i;
 581         unsigned char *cdata;
 582
 583         totlen=0;
 584         for (i = 0; i < dataurb->number_of_packets; i++) {
 585                 int n = dataurb->iso_frame_desc[i].actual_length;
 586                 int st = dataurb->iso_frame_desc[i].status;
 587
 588                 cdata = dataurb->transfer_buffer +
 589                         dataurb->iso_frame_desc[i].offset;
 590
 591                 if (st < 0) {
 592                         dev_warn(&uvd->dev->dev,
 593                                  "Data error: packet=%d. len=%d. status=%d.\n",
 594                                  i, n, st);
 595                         uvd->stats.iso_err_count++;
 596                         continue;
 597                 }
 598                 if (!n)
 599                         continue;
 600
 601                 totlen += qcm_process_frame(uvd, cdata, n);
 602         }
 603         return totlen;
 604 }
 605
 606 static void resubmit_urb(struct uvd *uvd, struct urb *urb)
 607 {
 608         int ret;
 609
 610         urb->dev = uvd->dev;
 611         ret = usb_submit_urb(urb, GFP_ATOMIC);
 612         if (ret)
 613                 err("usb_submit_urb error (%d)", ret);
 614 }
 615
 616 static void qcm_isoc_irq(struct urb *urb)
 617 {
 618         int len;
 619         struct uvd *uvd = urb->context;
 620
 621         if (!CAMERA_IS_OPERATIONAL(uvd))
 622                 return;
 623
 624         if (!uvd->streaming)
 625                 return;
 626
 627         uvd->stats.urb_count++;
 628
 629         if (!urb->actual_length) {
 630                 resubmit_urb(uvd, urb);
 631                 return;
 632         }
 633
 634         len = qcm_compress_iso(uvd, urb);
 635         resubmit_urb(uvd, urb);
 636         uvd->stats.urb_length = len;
 637         uvd->stats.data_count += len;
 638         if (len)
 639                 RingQueue_WakeUpInterruptible(&uvd->dp);
 640 }
 641
 642 static int qcm_start_data(struct uvd *uvd)
 643 {
 644         struct qcm *cam = (struct qcm *) uvd->user_data;
 645         int i;
 646         int errflag;
 647         int pktsz;
 648         int err;
 649
 650         pktsz = uvd->iso_packet_len;
 651         if (!CAMERA_IS_OPERATIONAL(uvd)) {
 652                 err("Camera is not operational");
 653                 return -EFAULT;
 654         }
 655
 656         err = usb_set_interface(uvd->dev, uvd->iface, uvd->ifaceAltActive);
 657         if (err < 0) {
 658                 err("usb_set_interface error");
 659                 uvd->last_error = err;
 660                 return -EBUSY;
 661         }
 662
 663         for (i=0; i < USBVIDEO_NUMSBUF; i++) {
 664                 int j, k;
 665                 struct urb *urb = uvd->sbuf[i].urb;
 666                 urb->dev = uvd->dev;
 667                 urb->context = uvd;
 668                 urb->pipe = usb_rcvisocpipe(uvd->dev, uvd->video_endp);
 669                 urb->interval = 1;
 670                 urb->transfer_flags = URB_ISO_ASAP;
 671                 urb->transfer_buffer = uvd->sbuf[i].data;
 672                 urb->complete = qcm_isoc_irq;
 673                 urb->number_of_packets = FRAMES_PER_DESC;
 674                 urb->transfer_buffer_length = pktsz * FRAMES_PER_DESC;
 675                 for (j=k=0; j < FRAMES_PER_DESC; j++, k += pktsz) {
 676                         urb->iso_frame_desc[j].offset = k;
 677                         urb->iso_frame_desc[j].length = pktsz;
 678                 }
 679         }
 680
 681         uvd->streaming = 1;
 682         uvd->curframe = -1;
 683         for (i=0; i < USBVIDEO_NUMSBUF; i++) {
 684                 errflag = usb_submit_urb(uvd->sbuf[i].urb, GFP_KERNEL);
 685                 if (errflag)
 686                         err ("usb_submit_isoc(%d) ret %d", i, errflag);
 687         }
 688
 689         CHECK_RET(err, qcm_setup_input_int(cam, uvd));
 690         CHECK_RET(err, qcm_camera_on(uvd));
 691         return 0;
 692 }
 693
 694 static void qcm_stop_data(struct uvd *uvd)
 695 {
 696         struct qcm *cam;
 697         int i, j;
 698         int ret;
 699
 700         if ((uvd == NULL) || (!uvd->streaming) || (uvd->dev == NULL))
 701                 return;
 702         cam = (struct qcm *) uvd->user_data;
 703
 704         ret = qcm_camera_off(uvd);
 705         if (ret)
 706                 dev_warn(&uvd->dev->dev, "couldn't turn the cam off.\n");
 707
 708         uvd->streaming = 0;
 709
 710         /* Unschedule all of the iso td's */
 711         for (i=0; i < USBVIDEO_NUMSBUF; i++)
 712                 usb_kill_urb(uvd->sbuf[i].urb);
 713
 714         qcm_stop_int_data(cam);
 715
 716         if (!uvd->remove_pending) {
 717                 /* Set packet size to 0 */
 718                 j = usb_set_interface(uvd->dev, uvd->iface,
 719                                         uvd->ifaceAltInactive);
 720                 if (j < 0) {
 721                         err("usb_set_interface() error %d.", j);
 722                         uvd->last_error = j;
 723                 }
 724         }
 725 }
 726
 727 static void qcm_process_isoc(struct uvd *uvd, struct usbvideo_frame *frame)
 728 {
 729         struct qcm *cam = (struct qcm *) uvd->user_data;
 730         int x;
 731         struct rgb *rgbL0;
 732         struct rgb *rgbL1;
 733         struct bayL0 *bayL0;
 734         struct bayL1 *bayL1;
 735         int hor,ver,hordel,verdel;
 736         assert(frame != NULL);
 737
 738         switch (cam->size) {
 739         case SIZE_160X120:
 740                 hor = 162; ver = 124; hordel = 1; verdel = 2;
 741                 break;
 742         case SIZE_320X240:
 743         default:
 744                 hor = 324; ver = 248; hordel = 2; verdel = 4;
 745                 break;
 746         }
 747
 748         if (frame->scanstate == ScanState_Scanning) {
 749                 while (RingQueue_GetLength(&uvd->dp) >=
 750                          4 + (hor*verdel + hordel)) {
 751                         if ((RING_QUEUE_PEEK(&uvd->dp, 0) == 0x00) &&
 752                             (RING_QUEUE_PEEK(&uvd->dp, 1) == 0xff) &&
 753                             (RING_QUEUE_PEEK(&uvd->dp, 2) == 0x00) &&
 754                             (RING_QUEUE_PEEK(&uvd->dp, 3) == 0xff)) {
 755                                 frame->curline = 0;
 756                                 frame->scanstate = ScanState_Lines;
 757                                 frame->frameState = FrameState_Grabbing;
 758                                 RING_QUEUE_DEQUEUE_BYTES(&uvd->dp, 4);
 759                         /*
 760                         * if we're starting, we need to discard the first
 761                         * 4 lines of y bayer data
 762                         * and the first 2 gr elements of x bayer data
 763                         */
 764                                 RING_QUEUE_DEQUEUE_BYTES(&uvd->dp,
 765                                                         (hor*verdel + hordel));
 766                                 break;
 767                         }
 768                         RING_QUEUE_DEQUEUE_BYTES(&uvd->dp, 1);
 769                 }
 770         }
 771
 772         if (frame->scanstate == ScanState_Scanning)
 773                 return;
 774
 775         /* now we can start processing bayer data so long as we have at least
 776         * 2 lines worth of data. this is the simplest demosaicing method that
 777         * I could think of. I use each 2x2 bayer element without interpolation
 778         * to generate 4 rgb pixels.
 779         */
 780         while ( frame->curline < cam->height &&
 781                 (RingQueue_GetLength(&uvd->dp) >= hor*2)) {
 782                 /* get 2 lines of bayer for demosaicing
 783                  * into 2 lines of RGB */
 784                 RingQueue_Dequeue(&uvd->dp, cam->scratch, hor*2);
 785                 bayL0 = (struct bayL0 *) cam->scratch;
 786                 bayL1 = (struct bayL1 *) (cam->scratch + hor);
 787                 /* frame->curline is the rgb y line */
 788                 rgbL0 = (struct rgb *)
 789                                 ( frame->data + (cam->width*3*frame->curline));
 790                 /* w/2 because we're already doing 2 pixels */
 791                 rgbL1 = rgbL0 + (cam->width/2);
 792
 793                 for (x=0; x < cam->width; x+=2) {
 794                         rgbL0->r = bayL0->r;
 795                         rgbL0->g = bayL0->g;
 796                         rgbL0->b = bayL1->b;
 797
 798                         rgbL0->r2 = bayL0->r;
 799                         rgbL0->g2 = bayL1->g;
 800                         rgbL0->b2 = bayL1->b;
 801
 802                         rgbL1->r = bayL0->r;
 803                         rgbL1->g = bayL1->g;
 804                         rgbL1->b = bayL1->b;
 805
 806                         rgbL1->r2 = bayL0->r;
 807                         rgbL1->g2 = bayL1->g;
 808                         rgbL1->b2 = bayL1->b;
 809
 810                         rgbL0++;
 811                         rgbL1++;
 812
 813                         bayL0++;
 814                         bayL1++;
 815                 }
 816
 817                 frame->seqRead_Length += cam->width*3*2;
 818                 frame->curline += 2;
 819         }
 820         /* See if we filled the frame */
 821         if (frame->curline == cam->height) {
 822                 frame->frameState = FrameState_Done_Hold;
 823                 frame->curline = 0;
 824                 uvd->curframe = -1;
 825                 uvd->stats.frame_num++;
 826         }
 827 }
 828
 829 /* taken from konicawc */
 830 static int qcm_set_video_mode(struct uvd *uvd, struct video_window *vw)
 831 {
 832         int ret;
 833         int newsize;
 834         int oldsize;
 835         int x = vw->width;
 836         int y = vw->height;
 837         struct qcm *cam = (struct qcm *) uvd->user_data;
 838
 839         if (x > 0 && y > 0) {
 840                 DEBUG(2, "trying to find size %d,%d", x, y);
 841                 for (newsize = 0; newsize <= MAX_FRAME_SIZE; newsize++) {
 842                         if ((camera_sizes[newsize].width == x) &&
 843                                 (camera_sizes[newsize].height == y))
 844                                 break;
 845                 }
 846         } else
 847                 newsize = cam->size;
 848
 849         if (newsize > MAX_FRAME_SIZE) {
 850                 DEBUG(1, "couldn't find size %d,%d", x, y);
 851                 return -EINVAL;
 852         }
 853
 854         if (newsize == cam->size) {
 855                 DEBUG(1, "Nothing to do");
 856                 return 0;
 857         }
 858
 859         qcm_stop_data(uvd);
 860
 861         if (cam->size != newsize) {
 862                 oldsize = cam->size;
 863                 cam->size = newsize;
 864                 ret = qcm_set_camera_size(uvd);
 865                 if (ret) {
 866                         err("Couldn't set camera size, err=%d",ret);
 867                         /* restore the original size */
 868                         cam->size = oldsize;
 869                         return ret;
 870                 }
 871         }
 872
 873         /* Flush the input queue and clear any current frame in progress */
 874
 875         RingQueue_Flush(&uvd->dp);
 876         if (uvd->curframe != -1) {
 877                 uvd->frame[uvd->curframe].curline = 0;
 878                 uvd->frame[uvd->curframe].seqRead_Length = 0;
 879                 uvd->frame[uvd->curframe].seqRead_Index = 0;
 880         }
 881
 882         CHECK_RET(ret, qcm_start_data(uvd));
 883         return 0;
 884 }
 885
 886 static int qcm_configure_video(struct uvd *uvd)
 887 {
 888         int ret;
 889         memset(&uvd->vpic, 0, sizeof(uvd->vpic));
 890         memset(&uvd->vpic_old, 0x55, sizeof(uvd->vpic_old));
 891
 892         uvd->vpic.colour = colour;
 893         uvd->vpic.hue = hue;
 894         uvd->vpic.brightness = brightness;
 895         uvd->vpic.contrast = contrast;
 896         uvd->vpic.whiteness = whiteness;
 897         uvd->vpic.depth = 24;
 898         uvd->vpic.palette = VIDEO_PALETTE_RGB24;
 899
 900         memset(&uvd->vcap, 0, sizeof(uvd->vcap));
 901         strcpy(uvd->vcap.name, "QCM USB Camera");
 902         uvd->vcap.type = VID_TYPE_CAPTURE;
 903         uvd->vcap.channels = 1;
 904         uvd->vcap.audios = 0;
 905
 906         uvd->vcap.minwidth = camera_sizes[SIZE_160X120].width;
 907         uvd->vcap.minheight = camera_sizes[SIZE_160X120].height;
 908         uvd->vcap.maxwidth = camera_sizes[SIZE_320X240].width;
 909         uvd->vcap.maxheight = camera_sizes[SIZE_320X240].height;
 910
 911         memset(&uvd->vchan, 0, sizeof(uvd->vchan));
 912         uvd->vchan.flags = 0 ;
 913         uvd->vchan.tuners = 0;
 914         uvd->vchan.channel = 0;
 915         uvd->vchan.type = VIDEO_TYPE_CAMERA;
 916         strcpy(uvd->vchan.name, "Camera");
 917
 918         CHECK_RET(ret, qcm_sensor_init(uvd));
 919         return 0;
 920 }
 921
 922 static int qcm_probe(struct usb_interface *intf,
 923                         const struct usb_device_id *devid)
 924 {
 925         int err;
 926         struct uvd *uvd;
 927         struct usb_device *dev = interface_to_usbdev(intf);
 928         struct qcm *cam;
 929         size_t buffer_size;
 930         unsigned char video_ep;
 931         struct usb_host_interface *interface;
 932         struct usb_endpoint_descriptor *endpoint;
 933         int i,j;
 934         unsigned int ifacenum, ifacenum_inact=0;
 935         __le16 sensor_id;
 936
 937         /* we don't support multiconfig cams */
 938         if (dev->descriptor.bNumConfigurations != 1)
 939                 return -ENODEV;
 940
 941         /* first check for the video interface and not
 942         * the audio interface */
 943         interface = &intf->cur_altsetting[0];
 944         if ((interface->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC)
 945                 || (interface->desc.bInterfaceSubClass !=
 946                         USB_CLASS_VENDOR_SPEC))
 947                 return -ENODEV;
 948
 949         /*
 950         walk through each endpoint in each setting in the interface
 951         stop when we find the one that's an isochronous IN endpoint.
 952         */
 953         for (i=0; i < intf->num_altsetting; i++) {
 954                 interface = &intf->cur_altsetting[i];
 955                 ifacenum = interface->desc.bAlternateSetting;
 956                 /* walk the end points */
 957                 for (j=0; j < interface->desc.bNumEndpoints; j++) {
 958                         endpoint = &interface->endpoint[j].desc;
 959
 960                         if (usb_endpoint_dir_out(endpoint))
 961                                 continue; /* not input then not good */
 962
 963                         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 964                         if (!buffer_size) {
 965                                 ifacenum_inact = ifacenum;
 966                                 continue; /* 0 pkt size is not what we want */
 967                         }
 968
 969                         if (usb_endpoint_xfer_isoc(endpoint)) {
 970                                 video_ep = endpoint->bEndpointAddress;
 971                                 /* break out of the search */
 972                                 goto good_videoep;
 973                         }
 974                 }
 975         }
 976         /* failed out since nothing useful was found */
 977         err("No suitable endpoint was found\n");
 978         return -ENODEV;
 979
 980 good_videoep:
 981         /* disable isochronous stream before doing anything else */
 982         err = qcm_stv_setb(dev, STV_ISO_ENABLE, 0);
 983         if (err < 0) {
 984                 err("Failed to disable sensor stream");
 985                 return -EIO;
 986         }
 987
 988         /*
 989         Check that this is the same unknown sensor that is known to work. This
 990         sensor is suspected to be the ST VV6422C001. I'll check the same value
 991         that the qc-usb driver checks. This value is probably not even the
 992         sensor ID since it matches the USB dev ID. Oh well. If it doesn't
 993         match, it's probably a diff sensor so exit and apologize.
 994         */
 995         err = qcm_stv_getw(dev, CMOS_SENSOR_IDREV, &sensor_id);
 996         if (err < 0) {
 997                 err("Couldn't read sensor values. Err %d\n",err);
 998                 return err;
 999         }
1000         if (sensor_id != cpu_to_le16(0x08F0)) {
1001                 err("Sensor ID %x != %x. Unsupported. Sorry\n",
1002                         le16_to_cpu(sensor_id), (0x08F0));
1003                 return -ENODEV;
1004         }
1005
1006         uvd = usbvideo_AllocateDevice(cams);
1007         if (!uvd)
1008                 return -ENOMEM;
1009
1010         cam = (struct qcm *) uvd->user_data;
1011
1012         /* buf for doing demosaicing */
1013         cam->scratch = kmalloc(324*2, GFP_KERNEL);
1014         if (!cam->scratch) /* uvd freed in dereg */
1015                 return -ENOMEM;
1016
1017         /* yes, if we fail after here, cam->scratch gets freed
1018         by qcm_free_uvd */
1019
1020         err = qcm_alloc_int_urb(cam);
1021         if (err < 0)
1022                 return err;
1023
1024         /* yes, if we fail after here, int urb gets freed
1025         by qcm_free_uvd */
1026
1027         RESTRICT_TO_RANGE(size, SIZE_160X120, SIZE_320X240);
1028         cam->width = camera_sizes[size].width;
1029         cam->height = camera_sizes[size].height;
1030         cam->size = size;
1031
1032         uvd->debug = debug;
1033         uvd->flags = 0;
1034         uvd->dev = dev;
1035         uvd->iface = intf->altsetting->desc.bInterfaceNumber;
1036         uvd->ifaceAltActive = ifacenum;
1037         uvd->ifaceAltInactive = ifacenum_inact;
1038         uvd->video_endp = video_ep;
1039         uvd->iso_packet_len = buffer_size;
1040         uvd->paletteBits = 1L << VIDEO_PALETTE_RGB24;
1041         uvd->defaultPalette = VIDEO_PALETTE_RGB24;
1042         uvd->canvas = VIDEOSIZE(320, 240);
1043         uvd->videosize = VIDEOSIZE(cam->width, cam->height);
1044         err = qcm_configure_video(uvd);
1045         if (err) {
1046                 err("failed to configure video settings");
1047                 return err;
1048         }
1049
1050         err = usbvideo_RegisterVideoDevice(uvd);
1051         if (err) { /* the uvd gets freed in Deregister */
1052                 err("usbvideo_RegisterVideoDevice() failed.");
1053                 return err;
1054         }
1055
1056         uvd->max_frame_size = (320 * 240 * 3);
1057         qcm_register_input(cam, dev);
1058         usb_set_intfdata(intf, uvd);
1059         return 0;
1060 }
1061
1062 static void qcm_free_uvd(struct uvd *uvd)
1063 {
1064         struct qcm *cam = (struct qcm *) uvd->user_data;
1065
1066         kfree(cam->scratch);
1067         qcm_unregister_input(cam);
1068         qcm_free_int(cam);
1069 }
1070
1071 static struct usbvideo_cb qcm_driver = {
1072         .probe =                qcm_probe,
1073         .setupOnOpen =          qcm_setup_on_open,
1074         .processData =          qcm_process_isoc,
1075         .setVideoMode =         qcm_set_video_mode,
1076         .startDataPump =        qcm_start_data,
1077         .stopDataPump =         qcm_stop_data,
1078         .adjustPicture =        qcm_adjust_picture,
1079         .userFree =             qcm_free_uvd
1080 };
1081
1082 static int __init qcm_init(void)
1083 {
1084         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1085                DRIVER_DESC "\n");
1086
1087         return usbvideo_register(
1088                 &cams,
1089                 MAX_CAMERAS,
1090                 sizeof(struct qcm),
1091                 "QCM",
1092                 &qcm_driver,
1093                 THIS_MODULE,
1094                 qcm_table);
1095 }
1096
1097 static void __exit qcm_exit(void)
1098 {
1099         usbvideo_Deregister(&cams);
1100 }
1101
1102 module_param(size, int, 0);
1103 MODULE_PARM_DESC(size, "Initial Size 0: 160x120 1: 320x240");
1104 module_param(colour, int, 0);
1105 MODULE_PARM_DESC(colour, "Initial colour");
1106 module_param(hue, int, 0);
1107 MODULE_PARM_DESC(hue, "Initial hue");
1108 module_param(brightness, int, 0);
1109 MODULE_PARM_DESC(brightness, "Initial brightness");
1110 module_param(contrast, int, 0);
1111 MODULE_PARM_DESC(contrast, "Initial contrast");
1112 module_param(whiteness, int, 0);
1113 MODULE_PARM_DESC(whiteness, "Initial whiteness");
1114
1115 #ifdef CONFIG_USB_DEBUG
1116 module_param(debug, int, S_IRUGO | S_IWUSR);
1117 MODULE_PARM_DESC(debug, "Debug level: 0-9 (default=0)");
1118 #endif
1119
1120 module_init(qcm_init);
1121 module_exit(qcm_exit);
1122
1123 MODULE_LICENSE("GPL");
1124 MODULE_AUTHOR("Jaya Kumar");
1125 MODULE_DESCRIPTION("QCM USB Camera");
1126 MODULE_SUPPORTED_DEVICE("QCM USB Camera");