drivers/media/video/gspca/ov534.c

   1 /*
   2  * ov534/ov772x gspca driver
   3  * Copyright (C) 2008 Antonio Ospite <ospite@studenti.unina.it>
   4  * Copyright (C) 2008 Jim Paris <jim@jtan.com>
   5  *
   6  * Based on a prototype written by Mark Ferrell <majortrips@gmail.com>
   7  * USB protocol reverse engineered by Jim Paris <jim@jtan.com>
   8  * https://jim.sh/svn/jim/devl/playstation/ps3/eye/test/
   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  * 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  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23  */
  24
  25 #define MODULE_NAME "ov534"
  26
  27 #include "gspca.h"
  28
  29 #define OV534_REG_ADDRESS       0xf1    /* ? */
  30 #define OV534_REG_SUBADDR       0xf2
  31 #define OV534_REG_WRITE         0xf3
  32 #define OV534_REG_READ          0xf4
  33 #define OV534_REG_OPERATION     0xf5
  34 #define OV534_REG_STATUS        0xf6
  35
  36 #define OV534_OP_WRITE_3        0x37
  37 #define OV534_OP_WRITE_2        0x33
  38 #define OV534_OP_READ_2         0xf9
  39
  40 #define CTRL_TIMEOUT 500
  41
  42 MODULE_AUTHOR("Antonio Ospite <ospite@studenti.unina.it>");
  43 MODULE_DESCRIPTION("GSPCA/OV534 USB Camera Driver");
  44 MODULE_LICENSE("GPL");
  45
  46 /* specific webcam descriptor */
  47 struct sd {
  48         struct gspca_dev gspca_dev;     /* !! must be the first item */
  49         __u32 last_fid;
  50         __u32 last_pts;
  51         int frame_rate;
  52 };
  53
  54 /* V4L2 controls supported by the driver */
  55 static struct ctrl sd_ctrls[] = {
  56 };
  57
  58 static const struct v4l2_pix_format vga_mode[] = {
  59         {640, 480, V4L2_PIX_FMT_YUYV, V4L2_FIELD_NONE,
  60          .bytesperline = 640 * 2,
  61          .sizeimage = 640 * 480 * 2,
  62          .colorspace = V4L2_COLORSPACE_JPEG,
  63          .priv = 0},
  64 };
  65
  66 static void ov534_reg_write(struct gspca_dev *gspca_dev, u16 reg, u8 val)
  67 {
  68         struct usb_device *udev = gspca_dev->dev;
  69         int ret;
  70
  71         PDEBUG(D_USBO, "reg=0x%04x, val=0%02x", reg, val);
  72         gspca_dev->usb_buf[0] = val;
  73         ret = usb_control_msg(udev,
  74                               usb_sndctrlpipe(udev, 0),
  75                               0x1,
  76                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  77                               0x0, reg, gspca_dev->usb_buf, 1, CTRL_TIMEOUT);
  78         if (ret < 0)
  79                 PDEBUG(D_ERR, "write failed");
  80 }
  81
  82 static u8 ov534_reg_read(struct gspca_dev *gspca_dev, u16 reg)
  83 {
  84         struct usb_device *udev = gspca_dev->dev;
  85         int ret;
  86
  87         ret = usb_control_msg(udev,
  88                               usb_rcvctrlpipe(udev, 0),
  89                               0x1,
  90                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  91                               0x0, reg, gspca_dev->usb_buf, 1, CTRL_TIMEOUT);
  92         PDEBUG(D_USBI, "reg=0x%04x, data=0x%02x", reg, gspca_dev->usb_buf[0]);
  93         if (ret < 0)
  94                 PDEBUG(D_ERR, "read failed");
  95         return gspca_dev->usb_buf[0];
  96 }
  97
  98 /* Two bits control LED: 0x21 bit 7 and 0x23 bit 7.
  99  * (direction and output)? */
 100 static void ov534_set_led(struct gspca_dev *gspca_dev, int status)
 101 {
 102         u8 data;
 103
 104         PDEBUG(D_CONF, "led status: %d", status);
 105
 106         data = ov534_reg_read(gspca_dev, 0x21);
 107         data |= 0x80;
 108         ov534_reg_write(gspca_dev, 0x21, data);
 109
 110         data = ov534_reg_read(gspca_dev, 0x23);
 111         if (status)
 112                 data |= 0x80;
 113         else
 114                 data &= ~(0x80);
 115
 116         ov534_reg_write(gspca_dev, 0x23, data);
 117 }
 118
 119 static int sccb_check_status(struct gspca_dev *gspca_dev)
 120 {
 121         u8 data;
 122         int i;
 123
 124         for (i = 0; i < 5; i++) {
 125                 data = ov534_reg_read(gspca_dev, OV534_REG_STATUS);
 126
 127                 switch (data) {
 128                 case 0x00:
 129                         return 1;
 130                 case 0x04:
 131                         return 0;
 132                 case 0x03:
 133                         break;
 134                 default:
 135                         PDEBUG(D_ERR, "sccb status 0x%02x, attempt %d/5",
 136                                data, i + 1);
 137                 }
 138         }
 139         return 0;
 140 }
 141
 142 static void sccb_reg_write(struct gspca_dev *gspca_dev, u16 reg, u8 val)
 143 {
 144         PDEBUG(D_USBO, "reg: 0x%04x, val: 0x%02x", reg, val);
 145         ov534_reg_write(gspca_dev, OV534_REG_SUBADDR, reg);
 146         ov534_reg_write(gspca_dev, OV534_REG_WRITE, val);
 147         ov534_reg_write(gspca_dev, OV534_REG_OPERATION, OV534_OP_WRITE_3);
 148
 149         if (!sccb_check_status(gspca_dev))
 150                 PDEBUG(D_ERR, "sccb_reg_write failed");
 151 }
 152
 153 #ifdef GSPCA_DEBUG
 154 static u8 sccb_reg_read(struct gspca_dev *gspca_dev, u16 reg)
 155 {
 156         ov534_reg_write(gspca_dev, OV534_REG_SUBADDR, reg);
 157         ov534_reg_write(gspca_dev, OV534_REG_OPERATION, OV534_OP_WRITE_2);
 158         if (!sccb_check_status(gspca_dev))
 159                 PDEBUG(D_ERR, "sccb_reg_read failed 1");
 160
 161         ov534_reg_write(gspca_dev, OV534_REG_OPERATION, OV534_OP_READ_2);
 162         if (!sccb_check_status(gspca_dev))
 163                 PDEBUG(D_ERR, "sccb_reg_read failed 2");
 164
 165         return ov534_reg_read(gspca_dev, OV534_REG_READ);
 166 }
 167 #endif
 168
 169 static const __u8 ov534_reg_initdata[][2] = {
 170         { 0xe7, 0x3a },
 171
 172         { OV534_REG_ADDRESS, 0x42 }, /* select OV772x sensor */
 173
 174         { 0xc2, 0x0c },
 175         { 0x88, 0xf8 },
 176         { 0xc3, 0x69 },
 177         { 0x89, 0xff },
 178         { 0x76, 0x03 },
 179         { 0x92, 0x01 },
 180         { 0x93, 0x18 },
 181         { 0x94, 0x10 },
 182         { 0x95, 0x10 },
 183         { 0xe2, 0x00 },
 184         { 0xe7, 0x3e },
 185
 186         { 0x96, 0x00 },
 187
 188         { 0x97, 0x20 },
 189         { 0x97, 0x20 },
 190         { 0x97, 0x20 },
 191         { 0x97, 0x0a },
 192         { 0x97, 0x3f },
 193         { 0x97, 0x4a },
 194         { 0x97, 0x20 },
 195         { 0x97, 0x15 },
 196         { 0x97, 0x0b },
 197
 198         { 0x8e, 0x40 },
 199         { 0x1f, 0x81 },
 200         { 0x34, 0x05 },
 201         { 0xe3, 0x04 },
 202         { 0x88, 0x00 },
 203         { 0x89, 0x00 },
 204         { 0x76, 0x00 },
 205         { 0xe7, 0x2e },
 206         { 0x31, 0xf9 },
 207         { 0x25, 0x42 },
 208         { 0x21, 0xf0 },
 209
 210         { 0x1c, 0x00 },
 211         { 0x1d, 0x40 },
 212         { 0x1d, 0x02 }, /* payload size 0x0200 * 4 = 2048 bytes */
 213         { 0x1d, 0x00 }, /* payload size */
 214         { 0x1d, 0x02 }, /* frame size 0x025800 * 4 = 614400 */
 215         { 0x1d, 0x58 }, /* frame size */
 216         { 0x1d, 0x00 }, /* frame size */
 217
 218         { 0x1c, 0x0a },
 219         { 0x1d, 0x08 }, /* turn on UVC header */
 220         { 0x1d, 0x0e }, /* .. */
 221
 222         { 0x8d, 0x1c },
 223         { 0x8e, 0x80 },
 224         { 0xe5, 0x04 },
 225
 226         { 0xc0, 0x50 },
 227         { 0xc1, 0x3c },
 228         { 0xc2, 0x0c },
 229 };
 230
 231 static const __u8 ov772x_reg_initdata[][2] = {
 232         { 0x12, 0x80 },
 233         { 0x11, 0x01 },
 234
 235         { 0x3d, 0x03 },
 236         { 0x17, 0x26 },
 237         { 0x18, 0xa0 },
 238         { 0x19, 0x07 },
 239         { 0x1a, 0xf0 },
 240         { 0x32, 0x00 },
 241         { 0x29, 0xa0 },
 242         { 0x2c, 0xf0 },
 243         { 0x65, 0x20 },
 244         { 0x11, 0x01 },
 245         { 0x42, 0x7f },
 246         { 0x63, 0xe0 },
 247         { 0x64, 0xff },
 248         { 0x66, 0x00 },
 249         { 0x13, 0xf0 },
 250         { 0x0d, 0x41 },
 251         { 0x0f, 0xc5 },
 252         { 0x14, 0x11 },
 253
 254         { 0x22, 0x7f },
 255         { 0x23, 0x03 },
 256         { 0x24, 0x40 },
 257         { 0x25, 0x30 },
 258         { 0x26, 0xa1 },
 259         { 0x2a, 0x00 },
 260         { 0x2b, 0x00 },
 261         { 0x6b, 0xaa },
 262         { 0x13, 0xff },
 263
 264         { 0x90, 0x05 },
 265         { 0x91, 0x01 },
 266         { 0x92, 0x03 },
 267         { 0x93, 0x00 },
 268         { 0x94, 0x60 },
 269         { 0x95, 0x3c },
 270         { 0x96, 0x24 },
 271         { 0x97, 0x1e },
 272         { 0x98, 0x62 },
 273         { 0x99, 0x80 },
 274         { 0x9a, 0x1e },
 275         { 0x9b, 0x08 },
 276         { 0x9c, 0x20 },
 277         { 0x9e, 0x81 },
 278
 279         { 0xa6, 0x04 },
 280         { 0x7e, 0x0c },
 281         { 0x7f, 0x16 },
 282         { 0x80, 0x2a },
 283         { 0x81, 0x4e },
 284         { 0x82, 0x61 },
 285         { 0x83, 0x6f },
 286         { 0x84, 0x7b },
 287         { 0x85, 0x86 },
 288         { 0x86, 0x8e },
 289         { 0x87, 0x97 },
 290         { 0x88, 0xa4 },
 291         { 0x89, 0xaf },
 292         { 0x8a, 0xc5 },
 293         { 0x8b, 0xd7 },
 294         { 0x8c, 0xe8 },
 295         { 0x8d, 0x20 },
 296
 297         { 0x0c, 0x90 },
 298
 299         { 0x2b, 0x00 },
 300         { 0x22, 0x7f },
 301         { 0x23, 0x03 },
 302         { 0x11, 0x01 },
 303         { 0x0c, 0xd0 },
 304         { 0x64, 0xff },
 305         { 0x0d, 0x41 },
 306
 307         { 0x14, 0x41 },
 308         { 0x0e, 0xcd },
 309         { 0xac, 0xbf },
 310         { 0x8e, 0x00 },
 311         { 0x0c, 0xd0 }
 312 };
 313
 314 /* set framerate */
 315 static void ov534_set_frame_rate(struct gspca_dev *gspca_dev)
 316 {
 317         struct sd *sd = (struct sd *) gspca_dev;
 318         int fr = sd->frame_rate;
 319
 320         switch (fr) {
 321         case 50:
 322                 sccb_reg_write(gspca_dev, 0x11, 0x01);
 323                 sccb_reg_write(gspca_dev, 0x0d, 0x41);
 324                 ov534_reg_write(gspca_dev, 0xe5, 0x02);
 325                 break;
 326         case 40:
 327                 sccb_reg_write(gspca_dev, 0x11, 0x02);
 328                 sccb_reg_write(gspca_dev, 0x0d, 0xc1);
 329                 ov534_reg_write(gspca_dev, 0xe5, 0x04);
 330                 break;
 331 /*      case 30: */
 332         default:
 333                 fr = 30;
 334                 sccb_reg_write(gspca_dev, 0x11, 0x04);
 335                 sccb_reg_write(gspca_dev, 0x0d, 0x81);
 336                 ov534_reg_write(gspca_dev, 0xe5, 0x02);
 337                 break;
 338         case 15:
 339                 sccb_reg_write(gspca_dev, 0x11, 0x03);
 340                 sccb_reg_write(gspca_dev, 0x0d, 0x41);
 341                 ov534_reg_write(gspca_dev, 0xe5, 0x04);
 342                 break;
 343         }
 344
 345         sd->frame_rate = fr;
 346         PDEBUG(D_PROBE, "frame_rate: %d", fr);
 347 }
 348
 349 /* setup method */
 350 static void ov534_setup(struct gspca_dev *gspca_dev)
 351 {
 352         int i;
 353
 354         /* Initialize bridge chip */
 355         for (i = 0; i < ARRAY_SIZE(ov534_reg_initdata); i++)
 356                 ov534_reg_write(gspca_dev, ov534_reg_initdata[i][0],
 357                                 ov534_reg_initdata[i][1]);
 358
 359         PDEBUG(D_PROBE, "sensor is ov%02x%02x",
 360                 sccb_reg_read(gspca_dev, 0x0a),
 361                 sccb_reg_read(gspca_dev, 0x0b));
 362
 363         ov534_set_led(gspca_dev, 1);
 364
 365         /* Initialize sensor */
 366         for (i = 0; i < ARRAY_SIZE(ov772x_reg_initdata); i++)
 367                 sccb_reg_write(gspca_dev, ov772x_reg_initdata[i][0],
 368                                ov772x_reg_initdata[i][1]);
 369
 370         ov534_reg_write(gspca_dev, 0xe0, 0x09);
 371         ov534_set_led(gspca_dev, 0);
 372 }
 373
 374 /* this function is called at probe time */
 375 static int sd_config(struct gspca_dev *gspca_dev,
 376                      const struct usb_device_id *id)
 377 {
 378         struct cam *cam;
 379
 380         cam = &gspca_dev->cam;
 381
 382         cam->epaddr = 0x01;
 383         cam->cam_mode = vga_mode;
 384         cam->nmodes = ARRAY_SIZE(vga_mode);
 385
 386         cam->bulk_size = 16384;
 387         cam->bulk_nurbs = 2;
 388
 389         return 0;
 390 }
 391
 392 /* this function is called at probe and resume time */
 393 static int sd_init(struct gspca_dev *gspca_dev)
 394 {
 395         ov534_setup(gspca_dev);
 396         ov534_set_frame_rate(gspca_dev);
 397
 398         return 0;
 399 }
 400
 401 static int sd_start(struct gspca_dev *gspca_dev)
 402 {
 403         /* start streaming data */
 404         ov534_set_led(gspca_dev, 1);
 405         ov534_reg_write(gspca_dev, 0xe0, 0x00);
 406
 407         return 0;
 408 }
 409
 410 static void sd_stopN(struct gspca_dev *gspca_dev)
 411 {
 412         /* stop streaming data */
 413         ov534_reg_write(gspca_dev, 0xe0, 0x09);
 414         ov534_set_led(gspca_dev, 0);
 415 }
 416
 417 /* Values for bmHeaderInfo (Video and Still Image Payload Headers, 2.4.3.3) */
 418 #define UVC_STREAM_EOH  (1 << 7)
 419 #define UVC_STREAM_ERR  (1 << 6)
 420 #define UVC_STREAM_STI  (1 << 5)
 421 #define UVC_STREAM_RES  (1 << 4)
 422 #define UVC_STREAM_SCR  (1 << 3)
 423 #define UVC_STREAM_PTS  (1 << 2)
 424 #define UVC_STREAM_EOF  (1 << 1)
 425 #define UVC_STREAM_FID  (1 << 0)
 426
 427 static void sd_pkt_scan(struct gspca_dev *gspca_dev, struct gspca_frame *frame,
 428                         __u8 *data, int len)
 429 {
 430         struct sd *sd = (struct sd *) gspca_dev;
 431         __u32 this_pts;
 432         int this_fid;
 433         int remaining_len = len;
 434         __u8 *next_data = data;
 435
 436 scan_next:
 437         if (remaining_len <= 0)
 438                 return;
 439
 440         data = next_data;
 441         len = min(remaining_len, 2048);
 442         remaining_len -= len;
 443         next_data += len;
 444
 445         /* Payloads are prefixed with a UVC-style header.  We
 446            consider a frame to start when the FID toggles, or the PTS
 447            changes.  A frame ends when EOF is set, and we've received
 448            the correct number of bytes. */
 449
 450         /* Verify UVC header.  Header length is always 12 */
 451         if (data[0] != 12 || len < 12) {
 452                 PDEBUG(D_PACK, "bad header");
 453                 goto discard;
 454         }
 455
 456         /* Check errors */
 457         if (data[1] & UVC_STREAM_ERR) {
 458                 PDEBUG(D_PACK, "payload error");
 459                 goto discard;
 460         }
 461
 462         /* Extract PTS and FID */
 463         if (!(data[1] & UVC_STREAM_PTS)) {
 464                 PDEBUG(D_PACK, "PTS not present");
 465                 goto discard;
 466         }
 467         this_pts = (data[5] << 24) | (data[4] << 16) | (data[3] << 8) | data[2];
 468         this_fid = (data[1] & UVC_STREAM_FID) ? 1 : 0;
 469
 470         /* If PTS or FID has changed, start a new frame. */
 471         if (this_pts != sd->last_pts || this_fid != sd->last_fid) {
 472                 gspca_frame_add(gspca_dev, FIRST_PACKET, frame, NULL, 0);
 473                 sd->last_pts = this_pts;
 474                 sd->last_fid = this_fid;
 475         }
 476
 477         /* Add the data from this payload */
 478         gspca_frame_add(gspca_dev, INTER_PACKET, frame,
 479                                 data + 12, len - 12);
 480
 481         /* If this packet is marked as EOF, end the frame */
 482         if (data[1] & UVC_STREAM_EOF) {
 483                 sd->last_pts = 0;
 484
 485                 if ((frame->data_end - frame->data) !=
 486                     (gspca_dev->width * gspca_dev->height * 2)) {
 487                         PDEBUG(D_PACK, "short frame");
 488                         goto discard;
 489                 }
 490
 491                 gspca_frame_add(gspca_dev, LAST_PACKET, frame, NULL, 0);
 492         }
 493
 494         /* Done this payload */
 495         goto scan_next;
 496
 497 discard:
 498         /* Discard data until a new frame starts. */
 499         gspca_frame_add(gspca_dev, DISCARD_PACKET, frame, NULL, 0);
 500         goto scan_next;
 501 }
 502
 503 /* get stream parameters (framerate) */
 504 static int sd_get_streamparm(struct gspca_dev *gspca_dev,
 505                              struct v4l2_streamparm *parm)
 506 {
 507         struct v4l2_captureparm *cp = &parm->parm.capture;
 508         struct v4l2_fract *tpf = &cp->timeperframe;
 509         struct sd *sd = (struct sd *) gspca_dev;
 510
 511         if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 512                 return -EINVAL;
 513
 514         cp->capability |= V4L2_CAP_TIMEPERFRAME;
 515         tpf->numerator = 1;
 516         tpf->denominator = sd->frame_rate;
 517
 518         return 0;
 519 }
 520
 521 /* set stream parameters (framerate) */
 522 static int sd_set_streamparm(struct gspca_dev *gspca_dev,
 523                              struct v4l2_streamparm *parm)
 524 {
 525         struct v4l2_captureparm *cp = &parm->parm.capture;
 526         struct v4l2_fract *tpf = &cp->timeperframe;
 527         struct sd *sd = (struct sd *) gspca_dev;
 528
 529         if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 530                 return -EINVAL;
 531
 532         /* Set requested framerate */
 533         sd->frame_rate = tpf->denominator / tpf->numerator;
 534         ov534_set_frame_rate(gspca_dev);
 535
 536         /* Return the actual framerate */
 537         tpf->numerator = 1;
 538         tpf->denominator = sd->frame_rate;
 539
 540         return 0;
 541 }
 542
 543 /* sub-driver description */
 544 static const struct sd_desc sd_desc = {
 545         .name     = MODULE_NAME,
 546         .ctrls    = sd_ctrls,
 547         .nctrls   = ARRAY_SIZE(sd_ctrls),
 548         .config   = sd_config,
 549         .init     = sd_init,
 550         .start    = sd_start,
 551         .stopN    = sd_stopN,
 552         .pkt_scan = sd_pkt_scan,
 553         .get_streamparm = sd_get_streamparm,
 554         .set_streamparm = sd_set_streamparm,
 555 };
 556
 557 /* -- module initialisation -- */
 558 static const __devinitdata struct usb_device_id device_table[] = {
 559         {USB_DEVICE(0x06f8, 0x3002)},   /* Hercules Blog Webcam */
 560         {USB_DEVICE(0x06f8, 0x3003)},   /* Hercules Dualpix HD Weblog */
 561         {USB_DEVICE(0x1415, 0x2000)},   /* Sony HD Eye for PS3 (SLEH 00201) */
 562         {}
 563 };
 564
 565 MODULE_DEVICE_TABLE(usb, device_table);
 566
 567 /* -- device connect -- */
 568 static int sd_probe(struct usb_interface *intf, const struct usb_device_id *id)
 569 {
 570         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 571                                THIS_MODULE);
 572 }
 573
 574 static struct usb_driver sd_driver = {
 575         .name       = MODULE_NAME,
 576         .id_table   = device_table,
 577         .probe      = sd_probe,
 578         .disconnect = gspca_disconnect,
 579 #ifdef CONFIG_PM
 580         .suspend    = gspca_suspend,
 581         .resume     = gspca_resume,
 582 #endif
 583 };
 584
 585 /* -- module insert / remove -- */
 586 static int __init sd_mod_init(void)
 587 {
 588         if (usb_register(&sd_driver) < 0)
 589                 return -1;
 590         PDEBUG(D_PROBE, "registered");
 591         return 0;
 592 }
 593
 594 static void __exit sd_mod_exit(void)
 595 {
 596         usb_deregister(&sd_driver);
 597         PDEBUG(D_PROBE, "deregistered");
 598 }
 599
 600 module_init(sd_mod_init);
 601 module_exit(sd_mod_exit);