drivers/media/video/gspca/ov534.c

   1 /*
   2  * ov534/ov772x gspca driver
   3  * Copyright (C) 2008 Antonio Ospite <ospite@studenti.unina.it>
   4  *
   5  * Based on a prototype written by Mark Ferrell <majortrips@gmail.com>
   6  * USB protocol reverse engineered by Jim Paris <jim@jtan.com>
   7  * https://jim.sh/svn/jim/devl/playstation/ps3/eye/test/
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  */
  23
  24 #define MODULE_NAME "ov534"
  25
  26 #include "gspca.h"
  27
  28 #define OV534_REG_ADDRESS       0xf1    /* ? */
  29 #define OV534_REG_SUBADDR       0xf2
  30 #define OV534_REG_WRITE         0xf3
  31 #define OV534_REG_READ          0xf4
  32 #define OV534_REG_OPERATION     0xf5
  33 #define OV534_REG_STATUS        0xf6
  34
  35 #define OV534_OP_WRITE_3        0x37
  36 #define OV534_OP_WRITE_2        0x33
  37 #define OV534_OP_READ_2         0xf9
  38
  39 #define CTRL_TIMEOUT 500
  40
  41 MODULE_AUTHOR("Antonio Ospite <ospite@studenti.unina.it>");
  42 MODULE_DESCRIPTION("GSPCA/OV534 USB Camera Driver");
  43 MODULE_LICENSE("GPL");
  44
  45 /* global parameters */
  46 static int frame_rate;
  47
  48 /* specific webcam descriptor */
  49 struct sd {
  50         struct gspca_dev gspca_dev;     /* !! must be the first item */
  51 };
  52
  53 /* V4L2 controls supported by the driver */
  54 static struct ctrl sd_ctrls[] = {
  55 };
  56
  57 static struct v4l2_pix_format vga_mode[] = {
  58         {640, 480, V4L2_PIX_FMT_YUYV, V4L2_FIELD_NONE,
  59          .bytesperline = 640 * 2,
  60          .sizeimage = 640 * 480 * 2,
  61          .colorspace = V4L2_COLORSPACE_JPEG,
  62          .priv = 0},
  63 };
  64
  65 static void ov534_reg_write(struct usb_device *udev, u16 reg, u8 val)
  66 {
  67         u8 data = val;
  68         int ret;
  69
  70         PDEBUG(D_USBO, "reg=0x%04x, val=0%02x", reg, val);
  71         ret = usb_control_msg(udev,
  72                               usb_sndctrlpipe(udev, 0),
  73                               0x1,
  74                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  75                               0x0, reg, &data, 1, CTRL_TIMEOUT);
  76         if (ret < 0)
  77                 PDEBUG(D_ERR, "write failed");
  78 }
  79
  80 static u8 ov534_reg_read(struct usb_device *udev, u16 reg)
  81 {
  82         u8 data;
  83         int ret;
  84
  85         ret = usb_control_msg(udev,
  86                               usb_rcvctrlpipe(udev, 0),
  87                               0x1,
  88                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  89                               0x0, reg, &data, 1, CTRL_TIMEOUT);
  90         PDEBUG(D_USBI, "reg=0x%04x, data=0x%02x", reg, data);
  91         if (ret < 0)
  92                 PDEBUG(D_ERR, "read failed");
  93         return data;
  94 }
  95
  96 static void ov534_reg_verify_write(struct usb_device *udev, u16 reg, u8 val)
  97 {
  98         u8 data;
  99
 100         ov534_reg_write(udev, reg, val);
 101         data = ov534_reg_read(udev, reg);
 102         if (data != val) {
 103                 PDEBUG(D_ERR | D_USBO,
 104                        "unexpected result from read: 0x%02x != 0x%02x", val,
 105                        data);
 106         }
 107 }
 108
 109 /* Two bits control LED: 0x21 bit 7 and 0x23 bit 7.
 110  * (direction and output)? */
 111 static void ov534_set_led(struct usb_device *udev, int status)
 112 {
 113         u8 data;
 114
 115         PDEBUG(D_CONF, "led status: %d", status);
 116
 117         data = ov534_reg_read(udev, 0x21);
 118         data |= 0x80;
 119         ov534_reg_write(udev, 0x21, data);
 120
 121         data = ov534_reg_read(udev, 0x23);
 122         if (status)
 123                 data |= 0x80;
 124         else
 125                 data &= ~(0x80);
 126
 127         ov534_reg_write(udev, 0x23, data);
 128 }
 129
 130 static int sccb_check_status(struct usb_device *udev)
 131 {
 132         u8 data;
 133         int i;
 134
 135         for (i = 0; i < 5; i++) {
 136                 data = ov534_reg_read(udev, OV534_REG_STATUS);
 137
 138                 switch (data) {
 139                 case 0x00:
 140                         return 1;
 141                 case 0x04:
 142                         return 0;
 143                 case 0x03:
 144                         break;
 145                 default:
 146                         PDEBUG(D_ERR, "sccb status 0x%02x, attempt %d/5\n",
 147                                data, i + 1);
 148                 }
 149         }
 150         return 0;
 151 }
 152
 153 static void sccb_reg_write(struct usb_device *udev, u16 reg, u8 val)
 154 {
 155         PDEBUG(D_USBO, "reg: 0x%04x, val: 0x%02x", reg, val);
 156         ov534_reg_write(udev, OV534_REG_SUBADDR, reg);
 157         ov534_reg_write(udev, OV534_REG_WRITE, val);
 158         ov534_reg_write(udev, OV534_REG_OPERATION, OV534_OP_WRITE_3);
 159
 160         if (!sccb_check_status(udev))
 161                 PDEBUG(D_ERR, "sccb_reg_write failed");
 162 }
 163
 164 /* setup method */
 165 static void ov534_setup(struct usb_device *udev)
 166 {
 167         ov534_reg_verify_write(udev, 0xe7, 0x3a);
 168
 169         ov534_reg_write(udev, OV534_REG_ADDRESS, 0x60);
 170         ov534_reg_write(udev, OV534_REG_ADDRESS, 0x60);
 171         ov534_reg_write(udev, OV534_REG_ADDRESS, 0x60);
 172         ov534_reg_write(udev, OV534_REG_ADDRESS, 0x42);
 173
 174         ov534_reg_verify_write(udev, 0xc2, 0x0c);
 175         ov534_reg_verify_write(udev, 0x88, 0xf8);
 176         ov534_reg_verify_write(udev, 0xc3, 0x69);
 177         ov534_reg_verify_write(udev, 0x89, 0xff);
 178         ov534_reg_verify_write(udev, 0x76, 0x03);
 179         ov534_reg_verify_write(udev, 0x92, 0x01);
 180         ov534_reg_verify_write(udev, 0x93, 0x18);
 181         ov534_reg_verify_write(udev, 0x94, 0x10);
 182         ov534_reg_verify_write(udev, 0x95, 0x10);
 183         ov534_reg_verify_write(udev, 0xe2, 0x00);
 184         ov534_reg_verify_write(udev, 0xe7, 0x3e);
 185
 186         ov534_reg_write(udev, 0x1c, 0x0a);
 187         ov534_reg_write(udev, 0x1d, 0x22);
 188         ov534_reg_write(udev, 0x1d, 0x06);
 189
 190         ov534_reg_verify_write(udev, 0x96, 0x00);
 191
 192         ov534_reg_write(udev, 0x97, 0x20);
 193         ov534_reg_write(udev, 0x97, 0x20);
 194         ov534_reg_write(udev, 0x97, 0x20);
 195         ov534_reg_write(udev, 0x97, 0x0a);
 196         ov534_reg_write(udev, 0x97, 0x3f);
 197         ov534_reg_write(udev, 0x97, 0x4a);
 198         ov534_reg_write(udev, 0x97, 0x20);
 199         ov534_reg_write(udev, 0x97, 0x15);
 200         ov534_reg_write(udev, 0x97, 0x0b);
 201
 202         ov534_reg_verify_write(udev, 0x8e, 0x40);
 203         ov534_reg_verify_write(udev, 0x1f, 0x81);
 204         ov534_reg_verify_write(udev, 0x34, 0x05);
 205         ov534_reg_verify_write(udev, 0xe3, 0x04);
 206         ov534_reg_verify_write(udev, 0x88, 0x00);
 207         ov534_reg_verify_write(udev, 0x89, 0x00);
 208         ov534_reg_verify_write(udev, 0x76, 0x00);
 209         ov534_reg_verify_write(udev, 0xe7, 0x2e);
 210         ov534_reg_verify_write(udev, 0x31, 0xf9);
 211         ov534_reg_verify_write(udev, 0x25, 0x42);
 212         ov534_reg_verify_write(udev, 0x21, 0xf0);
 213
 214         ov534_reg_write(udev, 0x1c, 0x00);
 215         ov534_reg_write(udev, 0x1d, 0x40);
 216         ov534_reg_write(udev, 0x1d, 0x02);
 217         ov534_reg_write(udev, 0x1d, 0x00);
 218         ov534_reg_write(udev, 0x1d, 0x02);
 219         ov534_reg_write(udev, 0x1d, 0x57);
 220         ov534_reg_write(udev, 0x1d, 0xff);
 221
 222         ov534_reg_verify_write(udev, 0x8d, 0x1c);
 223         ov534_reg_verify_write(udev, 0x8e, 0x80);
 224         ov534_reg_verify_write(udev, 0xe5, 0x04);
 225
 226         ov534_set_led(udev, 1);
 227
 228         sccb_reg_write(udev, 0x12, 0x80);
 229         sccb_reg_write(udev, 0x11, 0x01);
 230         sccb_reg_write(udev, 0x11, 0x01);
 231         sccb_reg_write(udev, 0x11, 0x01);
 232         sccb_reg_write(udev, 0x11, 0x01);
 233         sccb_reg_write(udev, 0x11, 0x01);
 234         sccb_reg_write(udev, 0x11, 0x01);
 235         sccb_reg_write(udev, 0x11, 0x01);
 236         sccb_reg_write(udev, 0x11, 0x01);
 237         sccb_reg_write(udev, 0x11, 0x01);
 238         sccb_reg_write(udev, 0x11, 0x01);
 239         sccb_reg_write(udev, 0x11, 0x01);
 240
 241         ov534_set_led(udev, 0);
 242
 243         sccb_reg_write(udev, 0x3d, 0x03);
 244         sccb_reg_write(udev, 0x17, 0x26);
 245         sccb_reg_write(udev, 0x18, 0xa0);
 246         sccb_reg_write(udev, 0x19, 0x07);
 247         sccb_reg_write(udev, 0x1a, 0xf0);
 248         sccb_reg_write(udev, 0x32, 0x00);
 249         sccb_reg_write(udev, 0x29, 0xa0);
 250         sccb_reg_write(udev, 0x2c, 0xf0);
 251         sccb_reg_write(udev, 0x65, 0x20);
 252         sccb_reg_write(udev, 0x11, 0x01);
 253         sccb_reg_write(udev, 0x42, 0x7f);
 254         sccb_reg_write(udev, 0x63, 0xe0);
 255         sccb_reg_write(udev, 0x64, 0xff);
 256         sccb_reg_write(udev, 0x66, 0x00);
 257         sccb_reg_write(udev, 0x13, 0xf0);
 258         sccb_reg_write(udev, 0x0d, 0x41);
 259         sccb_reg_write(udev, 0x0f, 0xc5);
 260         sccb_reg_write(udev, 0x14, 0x11);
 261
 262         ov534_set_led(udev, 1);
 263
 264         sccb_reg_write(udev, 0x22, 0x7f);
 265         sccb_reg_write(udev, 0x23, 0x03);
 266         sccb_reg_write(udev, 0x24, 0x40);
 267         sccb_reg_write(udev, 0x25, 0x30);
 268         sccb_reg_write(udev, 0x26, 0xa1);
 269         sccb_reg_write(udev, 0x2a, 0x00);
 270         sccb_reg_write(udev, 0x2b, 0x00);
 271         sccb_reg_write(udev, 0x6b, 0xaa);
 272         sccb_reg_write(udev, 0x13, 0xff);
 273
 274         ov534_set_led(udev, 0);
 275
 276         sccb_reg_write(udev, 0x90, 0x05);
 277         sccb_reg_write(udev, 0x91, 0x01);
 278         sccb_reg_write(udev, 0x92, 0x03);
 279         sccb_reg_write(udev, 0x93, 0x00);
 280         sccb_reg_write(udev, 0x94, 0x60);
 281         sccb_reg_write(udev, 0x95, 0x3c);
 282         sccb_reg_write(udev, 0x96, 0x24);
 283         sccb_reg_write(udev, 0x97, 0x1e);
 284         sccb_reg_write(udev, 0x98, 0x62);
 285         sccb_reg_write(udev, 0x99, 0x80);
 286         sccb_reg_write(udev, 0x9a, 0x1e);
 287         sccb_reg_write(udev, 0x9b, 0x08);
 288         sccb_reg_write(udev, 0x9c, 0x20);
 289         sccb_reg_write(udev, 0x9e, 0x81);
 290
 291         ov534_set_led(udev, 1);
 292
 293         sccb_reg_write(udev, 0xa6, 0x04);
 294         sccb_reg_write(udev, 0x7e, 0x0c);
 295         sccb_reg_write(udev, 0x7f, 0x16);
 296         sccb_reg_write(udev, 0x80, 0x2a);
 297         sccb_reg_write(udev, 0x81, 0x4e);
 298         sccb_reg_write(udev, 0x82, 0x61);
 299         sccb_reg_write(udev, 0x83, 0x6f);
 300         sccb_reg_write(udev, 0x84, 0x7b);
 301         sccb_reg_write(udev, 0x85, 0x86);
 302         sccb_reg_write(udev, 0x86, 0x8e);
 303         sccb_reg_write(udev, 0x87, 0x97);
 304         sccb_reg_write(udev, 0x88, 0xa4);
 305         sccb_reg_write(udev, 0x89, 0xaf);
 306         sccb_reg_write(udev, 0x8a, 0xc5);
 307         sccb_reg_write(udev, 0x8b, 0xd7);
 308         sccb_reg_write(udev, 0x8c, 0xe8);
 309         sccb_reg_write(udev, 0x8d, 0x20);
 310
 311         sccb_reg_write(udev, 0x0c, 0x90);
 312
 313         ov534_reg_verify_write(udev, 0xc0, 0x50);
 314         ov534_reg_verify_write(udev, 0xc1, 0x3c);
 315         ov534_reg_verify_write(udev, 0xc2, 0x0c);
 316
 317         ov534_set_led(udev, 1);
 318
 319         sccb_reg_write(udev, 0x2b, 0x00);
 320         sccb_reg_write(udev, 0x22, 0x7f);
 321         sccb_reg_write(udev, 0x23, 0x03);
 322         sccb_reg_write(udev, 0x11, 0x01);
 323         sccb_reg_write(udev, 0x0c, 0xd0);
 324         sccb_reg_write(udev, 0x64, 0xff);
 325         sccb_reg_write(udev, 0x0d, 0x41);
 326
 327         sccb_reg_write(udev, 0x14, 0x41);
 328         sccb_reg_write(udev, 0x0e, 0xcd);
 329         sccb_reg_write(udev, 0xac, 0xbf);
 330         sccb_reg_write(udev, 0x8e, 0x00);
 331         sccb_reg_write(udev, 0x0c, 0xd0);
 332
 333         ov534_reg_write(udev, 0xe0, 0x09);
 334         ov534_set_led(udev, 0);
 335 }
 336
 337 /* this function is called at probe time */
 338 static int sd_config(struct gspca_dev *gspca_dev,
 339                      const struct usb_device_id *id)
 340 {
 341         struct cam *cam;
 342
 343         cam = &gspca_dev->cam;
 344
 345         cam->epaddr = 0x01;
 346         cam->cam_mode = vga_mode;
 347         cam->nmodes = ARRAY_SIZE(vga_mode);
 348
 349         cam->bulk_size = vga_mode[0].sizeimage;
 350         cam->bulk_nurbs = 2;
 351
 352         PDEBUG(D_PROBE, "bulk_size = %d", cam->bulk_size);
 353
 354         return 0;
 355 }
 356
 357 /* this function is called at probe and resume time */
 358 static int sd_init(struct gspca_dev *gspca_dev)
 359 {
 360         int fr;
 361
 362         ov534_setup(gspca_dev->dev);
 363
 364         fr = frame_rate;
 365
 366         switch (fr) {
 367         case 50:
 368                 sccb_reg_write(gspca_dev->dev, 0x11, 0x01);
 369                 sccb_reg_write(gspca_dev->dev, 0x0d, 0x41);
 370                 ov534_reg_verify_write(gspca_dev->dev, 0xe5, 0x02);
 371                 break;
 372         case 40:
 373                 sccb_reg_write(gspca_dev->dev, 0x11, 0x02);
 374                 sccb_reg_write(gspca_dev->dev, 0x0d, 0xc1);
 375                 ov534_reg_verify_write(gspca_dev->dev, 0xe5, 0x04);
 376                 break;
 377 /*      case 30: */
 378         default:
 379                 fr = 30;
 380                 sccb_reg_write(gspca_dev->dev, 0x11, 0x04);
 381                 sccb_reg_write(gspca_dev->dev, 0x0d, 0x81);
 382                 ov534_reg_verify_write(gspca_dev->dev, 0xe5, 0x02);
 383                 break;
 384         case 15:
 385                 sccb_reg_write(gspca_dev->dev, 0x11, 0x03);
 386                 sccb_reg_write(gspca_dev->dev, 0x0d, 0x41);
 387                 ov534_reg_verify_write(gspca_dev->dev, 0xe5, 0x04);
 388                 break;
 389         }
 390
 391         PDEBUG(D_PROBE, "frame_rate: %d", fr);
 392
 393         return 0;
 394 }
 395
 396 static int sd_start(struct gspca_dev *gspca_dev)
 397 {
 398         PDEBUG(D_PROBE, "width = %d, height = %d",
 399                gspca_dev->width, gspca_dev->height);
 400
 401         gspca_dev->cam.bulk_size = gspca_dev->width * gspca_dev->height * 2;
 402
 403         /* start streaming data */
 404         ov534_set_led(gspca_dev->dev, 1);
 405         ov534_reg_write(gspca_dev->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->dev, 0xe0, 0x09);
 414         ov534_set_led(gspca_dev->dev, 0);
 415 }
 416
 417 static void sd_pkt_scan(struct gspca_dev *gspca_dev, struct gspca_frame *frame,
 418                         __u8 *data, int len)
 419 {
 420         /*
 421          * The current camera setup doesn't stream the last pixel, so we set it
 422          * to a dummy value
 423          */
 424         __u8 last_pixel[4] = { 0, 0, 0, 0 };
 425         int framesize = gspca_dev->cam.bulk_size;
 426
 427         if (len == framesize - 4) {
 428                 frame =
 429                     gspca_frame_add(gspca_dev, FIRST_PACKET, frame, data, len);
 430                 frame =
 431                     gspca_frame_add(gspca_dev, LAST_PACKET, frame, last_pixel,
 432                                     4);
 433         } else
 434                 PDEBUG(D_PACK, "packet len = %d, framesize = %d", len,
 435                        framesize);
 436 }
 437
 438 /* sub-driver description */
 439 static const struct sd_desc sd_desc = {
 440         .name     = MODULE_NAME,
 441         .ctrls    = sd_ctrls,
 442         .nctrls   = ARRAY_SIZE(sd_ctrls),
 443         .config   = sd_config,
 444         .init     = sd_init,
 445         .start    = sd_start,
 446         .stopN    = sd_stopN,
 447         .pkt_scan = sd_pkt_scan,
 448 };
 449
 450 /* -- module initialisation -- */
 451 static const __devinitdata struct usb_device_id device_table[] = {
 452         {USB_DEVICE(0x06f8, 0x3002)},   /* Hercules Blog Webcam */
 453         {USB_DEVICE(0x06f8, 0x3003)},   /* Hercules Dualpix HD Weblog */
 454         {USB_DEVICE(0x1415, 0x2000)},   /* Sony HD Eye for PS3 (SLEH 00201) */
 455         {}
 456 };
 457
 458 MODULE_DEVICE_TABLE(usb, device_table);
 459
 460 /* -- device connect -- */
 461 static int sd_probe(struct usb_interface *intf, const struct usb_device_id *id)
 462 {
 463         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 464                                THIS_MODULE);
 465 }
 466
 467 static struct usb_driver sd_driver = {
 468         .name       = MODULE_NAME,
 469         .id_table   = device_table,
 470         .probe      = sd_probe,
 471         .disconnect = gspca_disconnect,
 472 #ifdef CONFIG_PM
 473         .suspend    = gspca_suspend,
 474         .resume     = gspca_resume,
 475 #endif
 476 };
 477
 478 /* -- module insert / remove -- */
 479 static int __init sd_mod_init(void)
 480 {
 481         if (usb_register(&sd_driver) < 0)
 482                 return -1;
 483         PDEBUG(D_PROBE, "registered");
 484         return 0;
 485 }
 486
 487 static void __exit sd_mod_exit(void)
 488 {
 489         usb_deregister(&sd_driver);
 490         PDEBUG(D_PROBE, "deregistered");
 491 }
 492
 493 module_init(sd_mod_init);
 494 module_exit(sd_mod_exit);
 495
 496 module_param(frame_rate, int, 0644);
 497 MODULE_PARM_DESC(frame_rate, "Frame rate (15, 30, 40, 50)");