drivers/media/usb/gspca/se401.c

   1 /*
   2  * GSPCA Endpoints (formerly known as AOX) se401 USB Camera sub Driver
   3  *
   4  * Copyright (C) 2011 Hans de Goede <hdegoede@redhat.com>
   5  *
   6  * Based on the v4l1 se401 driver which is:
   7  *
   8  * Copyright (c) 2000 Jeroen B. Vreeken (pe1rxq@amsat.org)
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  */
  21
  22 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  23
  24 #define MODULE_NAME "se401"
  25
  26 #define BULK_SIZE 4096
  27 #define PACKET_SIZE 1024
  28 #define READ_REQ_SIZE 64
  29 #define MAX_MODES ((READ_REQ_SIZE - 6) / 4)
  30 /* The se401 compression algorithm uses a fixed quant factor, which
  31    can be configured by setting the high nibble of the SE401_OPERATINGMODE
  32    feature. This needs to exactly match what is in libv4l! */
  33 #define SE401_QUANT_FACT 8
  34
  35 #include <linux/input.h>
  36 #include <linux/slab.h>
  37 #include "gspca.h"
  38 #include "se401.h"
  39
  40 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
  41 MODULE_DESCRIPTION("Endpoints se401");
  42 MODULE_LICENSE("GPL");
  43
  44 /* exposure change state machine states */
  45 enum {
  46         EXPO_CHANGED,
  47         EXPO_DROP_FRAME,
  48         EXPO_NO_CHANGE,
  49 };
  50
  51 /* specific webcam descriptor */
  52 struct sd {
  53         struct gspca_dev gspca_dev;     /* !! must be the first item */
  54         struct { /* exposure/freq control cluster */
  55                 struct v4l2_ctrl *exposure;
  56                 struct v4l2_ctrl *freq;
  57         };
  58         bool has_brightness;
  59         struct v4l2_pix_format fmts[MAX_MODES];
  60         int pixels_read;
  61         int packet_read;
  62         u8 packet[PACKET_SIZE];
  63         u8 restart_stream;
  64         u8 button_state;
  65         u8 resetlevel;
  66         u8 resetlevel_frame_count;
  67         int resetlevel_adjust_dir;
  68         int expo_change_state;
  69 };
  70
  71
  72 static void se401_write_req(struct gspca_dev *gspca_dev, u16 req, u16 value,
  73                             int silent)
  74 {
  75         int err;
  76
  77         if (gspca_dev->usb_err < 0)
  78                 return;
  79
  80         err = usb_control_msg(gspca_dev->dev,
  81                               usb_sndctrlpipe(gspca_dev->dev, 0), req,
  82                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  83                               value, 0, NULL, 0, 1000);
  84         if (err < 0) {
  85                 if (!silent)
  86                         pr_err("write req failed req %#04x val %#04x error %d\n",
  87                                req, value, err);
  88                 gspca_dev->usb_err = err;
  89         }
  90 }
  91
  92 static void se401_read_req(struct gspca_dev *gspca_dev, u16 req, int silent)
  93 {
  94         int err;
  95
  96         if (gspca_dev->usb_err < 0)
  97                 return;
  98
  99         if (USB_BUF_SZ < READ_REQ_SIZE) {
 100                 pr_err("USB_BUF_SZ too small!!\n");
 101                 gspca_dev->usb_err = -ENOBUFS;
 102                 return;
 103         }
 104
 105         err = usb_control_msg(gspca_dev->dev,
 106                               usb_rcvctrlpipe(gspca_dev->dev, 0), req,
 107                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 108                               0, 0, gspca_dev->usb_buf, READ_REQ_SIZE, 1000);
 109         if (err < 0) {
 110                 if (!silent)
 111                         pr_err("read req failed req %#04x error %d\n",
 112                                req, err);
 113                 gspca_dev->usb_err = err;
 114         }
 115 }
 116
 117 static void se401_set_feature(struct gspca_dev *gspca_dev,
 118                               u16 selector, u16 param)
 119 {
 120         int err;
 121
 122         if (gspca_dev->usb_err < 0)
 123                 return;
 124
 125         err = usb_control_msg(gspca_dev->dev,
 126                               usb_sndctrlpipe(gspca_dev->dev, 0),
 127                               SE401_REQ_SET_EXT_FEATURE,
 128                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 129                               param, selector, NULL, 0, 1000);
 130         if (err < 0) {
 131                 pr_err("set feature failed sel %#04x param %#04x error %d\n",
 132                        selector, param, err);
 133                 gspca_dev->usb_err = err;
 134         }
 135 }
 136
 137 static int se401_get_feature(struct gspca_dev *gspca_dev, u16 selector)
 138 {
 139         int err;
 140
 141         if (gspca_dev->usb_err < 0)
 142                 return gspca_dev->usb_err;
 143
 144         if (USB_BUF_SZ < 2) {
 145                 pr_err("USB_BUF_SZ too small!!\n");
 146                 gspca_dev->usb_err = -ENOBUFS;
 147                 return gspca_dev->usb_err;
 148         }
 149
 150         err = usb_control_msg(gspca_dev->dev,
 151                               usb_rcvctrlpipe(gspca_dev->dev, 0),
 152                               SE401_REQ_GET_EXT_FEATURE,
 153                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 154                               0, selector, gspca_dev->usb_buf, 2, 1000);
 155         if (err < 0) {
 156                 pr_err("get feature failed sel %#04x error %d\n",
 157                        selector, err);
 158                 gspca_dev->usb_err = err;
 159                 return err;
 160         }
 161         return gspca_dev->usb_buf[0] | (gspca_dev->usb_buf[1] << 8);
 162 }
 163
 164 static void setbrightness(struct gspca_dev *gspca_dev, s32 val)
 165 {
 166         /* HDG: this does not seem to do anything on my cam */
 167         se401_write_req(gspca_dev, SE401_REQ_SET_BRT, val, 0);
 168 }
 169
 170 static void setgain(struct gspca_dev *gspca_dev, s32 val)
 171 {
 172         u16 gain = 63 - val;
 173
 174         /* red color gain */
 175         se401_set_feature(gspca_dev, HV7131_REG_ARCG, gain);
 176         /* green color gain */
 177         se401_set_feature(gspca_dev, HV7131_REG_AGCG, gain);
 178         /* blue color gain */
 179         se401_set_feature(gspca_dev, HV7131_REG_ABCG, gain);
 180 }
 181
 182 static void setexposure(struct gspca_dev *gspca_dev, s32 val, s32 freq)
 183 {
 184         struct sd *sd = (struct sd *) gspca_dev;
 185         int integration = val << 6;
 186         u8 expose_h, expose_m, expose_l;
 187
 188         /* Do this before the set_feature calls, for proper timing wrt
 189            the interrupt driven pkt_scan. Note we may still race but that
 190            is not a big issue, the expo change state machine is merely for
 191            avoiding underexposed frames getting send out, if one sneaks
 192            through so be it */
 193         sd->expo_change_state = EXPO_CHANGED;
 194
 195         if (freq == V4L2_CID_POWER_LINE_FREQUENCY_50HZ)
 196                 integration = integration - integration % 106667;
 197         if (freq == V4L2_CID_POWER_LINE_FREQUENCY_60HZ)
 198                 integration = integration - integration % 88889;
 199
 200         expose_h = (integration >> 16);
 201         expose_m = (integration >> 8);
 202         expose_l = integration;
 203
 204         /* integration time low */
 205         se401_set_feature(gspca_dev, HV7131_REG_TITL, expose_l);
 206         /* integration time mid */
 207         se401_set_feature(gspca_dev, HV7131_REG_TITM, expose_m);
 208         /* integration time high */
 209         se401_set_feature(gspca_dev, HV7131_REG_TITU, expose_h);
 210 }
 211
 212 static int sd_config(struct gspca_dev *gspca_dev,
 213                         const struct usb_device_id *id)
 214 {
 215         struct sd *sd = (struct sd *)gspca_dev;
 216         struct cam *cam = &gspca_dev->cam;
 217         u8 *cd = gspca_dev->usb_buf;
 218         int i, j, n;
 219         int widths[MAX_MODES], heights[MAX_MODES];
 220
 221         /* Read the camera descriptor */
 222         se401_read_req(gspca_dev, SE401_REQ_GET_CAMERA_DESCRIPTOR, 1);
 223         if (gspca_dev->usb_err) {
 224                 /* Sometimes after being idle for a while the se401 won't
 225                    respond and needs a good kicking  */
 226                 usb_reset_device(gspca_dev->dev);
 227                 gspca_dev->usb_err = 0;
 228                 se401_read_req(gspca_dev, SE401_REQ_GET_CAMERA_DESCRIPTOR, 0);
 229         }
 230
 231         /* Some cameras start with their LED on */
 232         se401_write_req(gspca_dev, SE401_REQ_LED_CONTROL, 0, 0);
 233         if (gspca_dev->usb_err)
 234                 return gspca_dev->usb_err;
 235
 236         if (cd[1] != 0x41) {
 237                 pr_err("Wrong descriptor type\n");
 238                 return -ENODEV;
 239         }
 240
 241         if (!(cd[2] & SE401_FORMAT_BAYER)) {
 242                 pr_err("Bayer format not supported!\n");
 243                 return -ENODEV;
 244         }
 245
 246         if (cd[3])
 247                 pr_info("ExtraFeatures: %d\n", cd[3]);
 248
 249         n = cd[4] | (cd[5] << 8);
 250         if (n > MAX_MODES) {
 251                 pr_err("Too many frame sizes\n");
 252                 return -ENODEV;
 253         }
 254
 255         for (i = 0; i < n ; i++) {
 256                 widths[i] = cd[6 + i * 4 + 0] | (cd[6 + i * 4 + 1] << 8);
 257                 heights[i] = cd[6 + i * 4 + 2] | (cd[6 + i * 4 + 3] << 8);
 258         }
 259
 260         for (i = 0; i < n ; i++) {
 261                 sd->fmts[i].width = widths[i];
 262                 sd->fmts[i].height = heights[i];
 263                 sd->fmts[i].field = V4L2_FIELD_NONE;
 264                 sd->fmts[i].colorspace = V4L2_COLORSPACE_SRGB;
 265                 sd->fmts[i].priv = 1;
 266
 267                 /* janggu compression only works for 1/4th or 1/16th res */
 268                 for (j = 0; j < n; j++) {
 269                         if (widths[j] / 2 == widths[i] &&
 270                             heights[j] / 2 == heights[i]) {
 271                                 sd->fmts[i].priv = 2;
 272                                 break;
 273                         }
 274                 }
 275                 /* 1/16th if available too is better then 1/4th, because
 276                    we then use a larger area of the sensor */
 277                 for (j = 0; j < n; j++) {
 278                         if (widths[j] / 4 == widths[i] &&
 279                             heights[j] / 4 == heights[i]) {
 280                                 sd->fmts[i].priv = 4;
 281                                 break;
 282                         }
 283                 }
 284
 285                 if (sd->fmts[i].priv == 1) {
 286                         /* Not a 1/4th or 1/16th res, use bayer */
 287                         sd->fmts[i].pixelformat = V4L2_PIX_FMT_SBGGR8;
 288                         sd->fmts[i].bytesperline = widths[i];
 289                         sd->fmts[i].sizeimage = widths[i] * heights[i];
 290                         pr_info("Frame size: %dx%d bayer\n",
 291                                 widths[i], heights[i]);
 292                 } else {
 293                         /* Found a match use janggu compression */
 294                         sd->fmts[i].pixelformat = V4L2_PIX_FMT_SE401;
 295                         sd->fmts[i].bytesperline = 0;
 296                         sd->fmts[i].sizeimage = widths[i] * heights[i] * 3;
 297                         pr_info("Frame size: %dx%d 1/%dth janggu\n",
 298                                 widths[i], heights[i],
 299                                 sd->fmts[i].priv * sd->fmts[i].priv);
 300                 }
 301         }
 302
 303         cam->cam_mode = sd->fmts;
 304         cam->nmodes = n;
 305         cam->bulk = 1;
 306         cam->bulk_size = BULK_SIZE;
 307         cam->bulk_nurbs = 4;
 308         sd->resetlevel = 0x2d; /* Set initial resetlevel */
 309
 310         /* See if the camera supports brightness */
 311         se401_read_req(gspca_dev, SE401_REQ_GET_BRT, 1);
 312         sd->has_brightness = !!gspca_dev->usb_err;
 313         gspca_dev->usb_err = 0;
 314
 315         return 0;
 316 }
 317
 318 /* this function is called at probe and resume time */
 319 static int sd_init(struct gspca_dev *gspca_dev)
 320 {
 321         return 0;
 322 }
 323
 324 /* function called at start time before URB creation */
 325 static int sd_isoc_init(struct gspca_dev *gspca_dev)
 326 {
 327         gspca_dev->alt = 1;     /* Ignore the bogus isoc alt settings */
 328
 329         return gspca_dev->usb_err;
 330 }
 331
 332 /* -- start the camera -- */
 333 static int sd_start(struct gspca_dev *gspca_dev)
 334 {
 335         struct sd *sd = (struct sd *)gspca_dev;
 336         int mult = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
 337         int mode = 0;
 338
 339         se401_write_req(gspca_dev, SE401_REQ_CAMERA_POWER, 1, 1);
 340         if (gspca_dev->usb_err) {
 341                 /* Sometimes after being idle for a while the se401 won't
 342                    respond and needs a good kicking  */
 343                 usb_reset_device(gspca_dev->dev);
 344                 gspca_dev->usb_err = 0;
 345                 se401_write_req(gspca_dev, SE401_REQ_CAMERA_POWER, 1, 0);
 346         }
 347         se401_write_req(gspca_dev, SE401_REQ_LED_CONTROL, 1, 0);
 348
 349         se401_set_feature(gspca_dev, HV7131_REG_MODE_B, 0x05);
 350
 351         /* set size + mode */
 352         se401_write_req(gspca_dev, SE401_REQ_SET_WIDTH,
 353                         gspca_dev->pixfmt.width * mult, 0);
 354         se401_write_req(gspca_dev, SE401_REQ_SET_HEIGHT,
 355                         gspca_dev->pixfmt.height * mult, 0);
 356         /*
 357          * HDG: disabled this as it does not seem to do anything
 358          * se401_write_req(gspca_dev, SE401_REQ_SET_OUTPUT_MODE,
 359          *                 SE401_FORMAT_BAYER, 0);
 360          */
 361
 362         switch (mult) {
 363         case 1: /* Raw bayer */
 364                 mode = 0x03; break;
 365         case 2: /* 1/4th janggu */
 366                 mode = SE401_QUANT_FACT << 4; break;
 367         case 4: /* 1/16th janggu */
 368                 mode = (SE401_QUANT_FACT << 4) | 0x02; break;
 369         }
 370         se401_set_feature(gspca_dev, SE401_OPERATINGMODE, mode);
 371
 372         se401_set_feature(gspca_dev, HV7131_REG_ARLV, sd->resetlevel);
 373
 374         sd->packet_read = 0;
 375         sd->pixels_read = 0;
 376         sd->restart_stream = 0;
 377         sd->resetlevel_frame_count = 0;
 378         sd->resetlevel_adjust_dir = 0;
 379         sd->expo_change_state = EXPO_NO_CHANGE;
 380
 381         se401_write_req(gspca_dev, SE401_REQ_START_CONTINUOUS_CAPTURE, 0, 0);
 382
 383         return gspca_dev->usb_err;
 384 }
 385
 386 static void sd_stopN(struct gspca_dev *gspca_dev)
 387 {
 388         se401_write_req(gspca_dev, SE401_REQ_STOP_CONTINUOUS_CAPTURE, 0, 0);
 389         se401_write_req(gspca_dev, SE401_REQ_LED_CONTROL, 0, 0);
 390         se401_write_req(gspca_dev, SE401_REQ_CAMERA_POWER, 0, 0);
 391 }
 392
 393 static void sd_dq_callback(struct gspca_dev *gspca_dev)
 394 {
 395         struct sd *sd = (struct sd *)gspca_dev;
 396         unsigned int ahrc, alrc;
 397         int oldreset, adjust_dir;
 398
 399         /* Restart the stream if requested do so by pkt_scan */
 400         if (sd->restart_stream) {
 401                 sd_stopN(gspca_dev);
 402                 sd_start(gspca_dev);
 403                 sd->restart_stream = 0;
 404         }
 405
 406         /* Automatically adjust sensor reset level
 407            Hyundai have some really nice docs about this and other sensor
 408            related stuff on their homepage: www.hei.co.kr */
 409         sd->resetlevel_frame_count++;
 410         if (sd->resetlevel_frame_count < 20)
 411                 return;
 412
 413         /* For some reason this normally read-only register doesn't get reset
 414            to zero after reading them just once... */
 415         se401_get_feature(gspca_dev, HV7131_REG_HIREFNOH);
 416         se401_get_feature(gspca_dev, HV7131_REG_HIREFNOL);
 417         se401_get_feature(gspca_dev, HV7131_REG_LOREFNOH);
 418         se401_get_feature(gspca_dev, HV7131_REG_LOREFNOL);
 419         ahrc = 256*se401_get_feature(gspca_dev, HV7131_REG_HIREFNOH) +
 420             se401_get_feature(gspca_dev, HV7131_REG_HIREFNOL);
 421         alrc = 256*se401_get_feature(gspca_dev, HV7131_REG_LOREFNOH) +
 422             se401_get_feature(gspca_dev, HV7131_REG_LOREFNOL);
 423
 424         /* Not an exact science, but it seems to work pretty well... */
 425         oldreset = sd->resetlevel;
 426         if (alrc > 10) {
 427                 while (alrc >= 10 && sd->resetlevel < 63) {
 428                         sd->resetlevel++;
 429                         alrc /= 2;
 430                 }
 431         } else if (ahrc > 20) {
 432                 while (ahrc >= 20 && sd->resetlevel > 0) {
 433                         sd->resetlevel--;
 434                         ahrc /= 2;
 435                 }
 436         }
 437         /* Detect ping-pong-ing and halve adjustment to avoid overshoot */
 438         if (sd->resetlevel > oldreset)
 439                 adjust_dir = 1;
 440         else
 441                 adjust_dir = -1;
 442         if (sd->resetlevel_adjust_dir &&
 443             sd->resetlevel_adjust_dir != adjust_dir)
 444                 sd->resetlevel = oldreset + (sd->resetlevel - oldreset) / 2;
 445
 446         if (sd->resetlevel != oldreset) {
 447                 sd->resetlevel_adjust_dir = adjust_dir;
 448                 se401_set_feature(gspca_dev, HV7131_REG_ARLV, sd->resetlevel);
 449         }
 450
 451         sd->resetlevel_frame_count = 0;
 452 }
 453
 454 static void sd_complete_frame(struct gspca_dev *gspca_dev, u8 *data, int len)
 455 {
 456         struct sd *sd = (struct sd *)gspca_dev;
 457
 458         switch (sd->expo_change_state) {
 459         case EXPO_CHANGED:
 460                 /* The exposure was changed while this frame
 461                    was being send, so this frame is ok */
 462                 sd->expo_change_state = EXPO_DROP_FRAME;
 463                 break;
 464         case EXPO_DROP_FRAME:
 465                 /* The exposure was changed while this frame
 466                    was being captured, drop it! */
 467                 gspca_dev->last_packet_type = DISCARD_PACKET;
 468                 sd->expo_change_state = EXPO_NO_CHANGE;
 469                 break;
 470         case EXPO_NO_CHANGE:
 471                 break;
 472         }
 473         gspca_frame_add(gspca_dev, LAST_PACKET, data, len);
 474 }
 475
 476 static void sd_pkt_scan_janggu(struct gspca_dev *gspca_dev, u8 *data, int len)
 477 {
 478         struct sd *sd = (struct sd *)gspca_dev;
 479         int imagesize = gspca_dev->pixfmt.width * gspca_dev->pixfmt.height;
 480         int i, plen, bits, pixels, info, count;
 481
 482         if (sd->restart_stream)
 483                 return;
 484
 485         /* Sometimes a 1024 bytes garbage bulk packet is send between frames */
 486         if (gspca_dev->last_packet_type == LAST_PACKET && len == 1024) {
 487                 gspca_dev->last_packet_type = DISCARD_PACKET;
 488                 return;
 489         }
 490
 491         i = 0;
 492         while (i < len) {
 493                 /* Read header if not already be present from prev bulk pkt */
 494                 if (sd->packet_read < 4) {
 495                         count = 4 - sd->packet_read;
 496                         if (count > len - i)
 497                                 count = len - i;
 498                         memcpy(&sd->packet[sd->packet_read], &data[i], count);
 499                         sd->packet_read += count;
 500                         i += count;
 501                         if (sd->packet_read < 4)
 502                                 break;
 503                 }
 504                 bits   = sd->packet[3] + (sd->packet[2] << 8);
 505                 pixels = sd->packet[1] + ((sd->packet[0] & 0x3f) << 8);
 506                 info   = (sd->packet[0] & 0xc0) >> 6;
 507                 plen   = ((bits + 47) >> 4) << 1;
 508                 /* Sanity checks */
 509                 if (plen > 1024) {
 510                         pr_err("invalid packet len %d restarting stream\n",
 511                                plen);
 512                         goto error;
 513                 }
 514                 if (info == 3) {
 515                         pr_err("unknown frame info value restarting stream\n");
 516                         goto error;
 517                 }
 518
 519                 /* Read (remainder of) packet contents */
 520                 count = plen - sd->packet_read;
 521                 if (count > len - i)
 522                         count = len - i;
 523                 memcpy(&sd->packet[sd->packet_read], &data[i], count);
 524                 sd->packet_read += count;
 525                 i += count;
 526                 if (sd->packet_read < plen)
 527                         break;
 528
 529                 sd->pixels_read += pixels;
 530                 sd->packet_read = 0;
 531
 532                 switch (info) {
 533                 case 0: /* Frame data */
 534                         gspca_frame_add(gspca_dev, INTER_PACKET, sd->packet,
 535                                         plen);
 536                         break;
 537                 case 1: /* EOF */
 538                         if (sd->pixels_read != imagesize) {
 539                                 pr_err("frame size %d expected %d\n",
 540                                        sd->pixels_read, imagesize);
 541                                 goto error;
 542                         }
 543                         sd_complete_frame(gspca_dev, sd->packet, plen);
 544                         return; /* Discard the rest of the bulk packet !! */
 545                 case 2: /* SOF */
 546                         gspca_frame_add(gspca_dev, FIRST_PACKET, sd->packet,
 547                                         plen);
 548                         sd->pixels_read = pixels;
 549                         break;
 550                 }
 551         }
 552         return;
 553
 554 error:
 555         sd->restart_stream = 1;
 556         /* Give userspace a 0 bytes frame, so our dq callback gets
 557            called and it can restart the stream */
 558         gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
 559         gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
 560 }
 561
 562 static void sd_pkt_scan_bayer(struct gspca_dev *gspca_dev, u8 *data, int len)
 563 {
 564         struct cam *cam = &gspca_dev->cam;
 565         int imagesize = cam->cam_mode[gspca_dev->curr_mode].sizeimage;
 566
 567         if (gspca_dev->image_len == 0) {
 568                 gspca_frame_add(gspca_dev, FIRST_PACKET, data, len);
 569                 return;
 570         }
 571
 572         if (gspca_dev->image_len + len >= imagesize) {
 573                 sd_complete_frame(gspca_dev, data, len);
 574                 return;
 575         }
 576
 577         gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
 578 }
 579
 580 static void sd_pkt_scan(struct gspca_dev *gspca_dev, u8 *data, int len)
 581 {
 582         int mult = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
 583
 584         if (len == 0)
 585                 return;
 586
 587         if (mult == 1) /* mult == 1 means raw bayer */
 588                 sd_pkt_scan_bayer(gspca_dev, data, len);
 589         else
 590                 sd_pkt_scan_janggu(gspca_dev, data, len);
 591 }
 592
 593 #if IS_ENABLED(CONFIG_INPUT)
 594 static int sd_int_pkt_scan(struct gspca_dev *gspca_dev, u8 *data, int len)
 595 {
 596         struct sd *sd = (struct sd *)gspca_dev;
 597         u8 state;
 598
 599         if (len != 2)
 600                 return -EINVAL;
 601
 602         switch (data[0]) {
 603         case 0:
 604         case 1:
 605                 state = data[0];
 606                 break;
 607         default:
 608                 return -EINVAL;
 609         }
 610         if (sd->button_state != state) {
 611                 input_report_key(gspca_dev->input_dev, KEY_CAMERA, state);
 612                 input_sync(gspca_dev->input_dev);
 613                 sd->button_state = state;
 614         }
 615
 616         return 0;
 617 }
 618 #endif
 619
 620 static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
 621 {
 622         struct gspca_dev *gspca_dev =
 623                 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
 624         struct sd *sd = (struct sd *)gspca_dev;
 625
 626         gspca_dev->usb_err = 0;
 627
 628         if (!gspca_dev->streaming)
 629                 return 0;
 630
 631         switch (ctrl->id) {
 632         case V4L2_CID_BRIGHTNESS:
 633                 setbrightness(gspca_dev, ctrl->val);
 634                 break;
 635         case V4L2_CID_GAIN:
 636                 setgain(gspca_dev, ctrl->val);
 637                 break;
 638         case V4L2_CID_EXPOSURE:
 639                 setexposure(gspca_dev, ctrl->val, sd->freq->val);
 640                 break;
 641         }
 642         return gspca_dev->usb_err;
 643 }
 644
 645 static const struct v4l2_ctrl_ops sd_ctrl_ops = {
 646         .s_ctrl = sd_s_ctrl,
 647 };
 648
 649 static int sd_init_controls(struct gspca_dev *gspca_dev)
 650 {
 651         struct sd *sd = (struct sd *)gspca_dev;
 652         struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
 653
 654         gspca_dev->vdev.ctrl_handler = hdl;
 655         v4l2_ctrl_handler_init(hdl, 4);
 656         if (sd->has_brightness)
 657                 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 658                         V4L2_CID_BRIGHTNESS, 0, 255, 1, 15);
 659         /* max is really 63 but > 50 is not pretty */
 660         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 661                         V4L2_CID_GAIN, 0, 50, 1, 25);
 662         sd->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 663                         V4L2_CID_EXPOSURE, 0, 32767, 1, 15000);
 664         sd->freq = v4l2_ctrl_new_std_menu(hdl, &sd_ctrl_ops,
 665                         V4L2_CID_POWER_LINE_FREQUENCY,
 666                         V4L2_CID_POWER_LINE_FREQUENCY_60HZ, 0, 0);
 667
 668         if (hdl->error) {
 669                 pr_err("Could not initialize controls\n");
 670                 return hdl->error;
 671         }
 672         v4l2_ctrl_cluster(2, &sd->exposure);
 673         return 0;
 674 }
 675
 676 /* sub-driver description */
 677 static const struct sd_desc sd_desc = {
 678         .name = MODULE_NAME,
 679         .config = sd_config,
 680         .init = sd_init,
 681         .init_controls = sd_init_controls,
 682         .isoc_init = sd_isoc_init,
 683         .start = sd_start,
 684         .stopN = sd_stopN,
 685         .dq_callback = sd_dq_callback,
 686         .pkt_scan = sd_pkt_scan,
 687 #if IS_ENABLED(CONFIG_INPUT)
 688         .int_pkt_scan = sd_int_pkt_scan,
 689 #endif
 690 };
 691
 692 /* -- module initialisation -- */
 693 static const struct usb_device_id device_table[] = {
 694         {USB_DEVICE(0x03e8, 0x0004)}, /* Endpoints/Aox SE401 */
 695         {USB_DEVICE(0x0471, 0x030b)}, /* Philips PCVC665K */
 696         {USB_DEVICE(0x047d, 0x5001)}, /* Kensington 67014 */
 697         {USB_DEVICE(0x047d, 0x5002)}, /* Kensington 6701(5/7) */
 698         {USB_DEVICE(0x047d, 0x5003)}, /* Kensington 67016 */
 699         {}
 700 };
 701 MODULE_DEVICE_TABLE(usb, device_table);
 702
 703 /* -- device connect -- */
 704 static int sd_probe(struct usb_interface *intf,
 705                         const struct usb_device_id *id)
 706 {
 707         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 708                                 THIS_MODULE);
 709 }
 710
 711 static int sd_pre_reset(struct usb_interface *intf)
 712 {
 713         return 0;
 714 }
 715
 716 static int sd_post_reset(struct usb_interface *intf)
 717 {
 718         return 0;
 719 }
 720
 721 static struct usb_driver sd_driver = {
 722         .name = MODULE_NAME,
 723         .id_table = device_table,
 724         .probe = sd_probe,
 725         .disconnect = gspca_disconnect,
 726 #ifdef CONFIG_PM
 727         .suspend = gspca_suspend,
 728         .resume = gspca_resume,
 729         .reset_resume = gspca_resume,
 730 #endif
 731         .pre_reset = sd_pre_reset,
 732         .post_reset = sd_post_reset,
 733 };
 734
 735 module_usb_driver(sd_driver);