drivers/media/usb/gspca/stk014.c

   1 /*
   2  * Syntek DV4000 (STK014) subdriver
   3  *
   4  * Copyright (C) 2008 Jean-Francois Moine (http://moinejf.free.fr)
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  18
  19 #define MODULE_NAME "stk014"
  20
  21 #include "gspca.h"
  22 #include "jpeg.h"
  23
  24 MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
  25 MODULE_DESCRIPTION("Syntek DV4000 (STK014) USB Camera Driver");
  26 MODULE_LICENSE("GPL");
  27
  28 #define QUALITY 50
  29
  30 /* specific webcam descriptor */
  31 struct sd {
  32         struct gspca_dev gspca_dev;     /* !! must be the first item */
  33         u8 jpeg_hdr[JPEG_HDR_SZ];
  34 };
  35
  36 static const struct v4l2_pix_format vga_mode[] = {
  37         {320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
  38                 .bytesperline = 320,
  39                 .sizeimage = 320 * 240 * 3 / 8 + 590,
  40                 .colorspace = V4L2_COLORSPACE_JPEG,
  41                 .priv = 1},
  42         {640, 480, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
  43                 .bytesperline = 640,
  44                 .sizeimage = 640 * 480 * 3 / 8 + 590,
  45                 .colorspace = V4L2_COLORSPACE_JPEG,
  46                 .priv = 0},
  47 };
  48
  49 /* -- read a register -- */
  50 static u8 reg_r(struct gspca_dev *gspca_dev,
  51                         __u16 index)
  52 {
  53         struct usb_device *dev = gspca_dev->dev;
  54         int ret;
  55
  56         if (gspca_dev->usb_err < 0)
  57                 return 0;
  58         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
  59                         0x00,
  60                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  61                         0x00,
  62                         index,
  63                         gspca_dev->usb_buf, 1,
  64                         500);
  65         if (ret < 0) {
  66                 pr_err("reg_r err %d\n", ret);
  67                 gspca_dev->usb_err = ret;
  68                 return 0;
  69         }
  70         return gspca_dev->usb_buf[0];
  71 }
  72
  73 /* -- write a register -- */
  74 static void reg_w(struct gspca_dev *gspca_dev,
  75                         __u16 index, __u16 value)
  76 {
  77         struct usb_device *dev = gspca_dev->dev;
  78         int ret;
  79
  80         if (gspca_dev->usb_err < 0)
  81                 return;
  82         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
  83                         0x01,
  84                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  85                         value,
  86                         index,
  87                         NULL,
  88                         0,
  89                         500);
  90         if (ret < 0) {
  91                 pr_err("reg_w err %d\n", ret);
  92                 gspca_dev->usb_err = ret;
  93         }
  94 }
  95
  96 /* -- get a bulk value (4 bytes) -- */
  97 static void rcv_val(struct gspca_dev *gspca_dev,
  98                         int ads)
  99 {
 100         struct usb_device *dev = gspca_dev->dev;
 101         int alen, ret;
 102
 103         reg_w(gspca_dev, 0x634, (ads >> 16) & 0xff);
 104         reg_w(gspca_dev, 0x635, (ads >> 8) & 0xff);
 105         reg_w(gspca_dev, 0x636, ads & 0xff);
 106         reg_w(gspca_dev, 0x637, 0);
 107         reg_w(gspca_dev, 0x638, 4);     /* len & 0xff */
 108         reg_w(gspca_dev, 0x639, 0);     /* len >> 8 */
 109         reg_w(gspca_dev, 0x63a, 0);
 110         reg_w(gspca_dev, 0x63b, 0);
 111         reg_w(gspca_dev, 0x630, 5);
 112         if (gspca_dev->usb_err < 0)
 113                 return;
 114         ret = usb_bulk_msg(dev,
 115                         usb_rcvbulkpipe(dev, 0x05),
 116                         gspca_dev->usb_buf,
 117                         4,              /* length */
 118                         &alen,
 119                         500);           /* timeout in milliseconds */
 120         if (ret < 0) {
 121                 pr_err("rcv_val err %d\n", ret);
 122                 gspca_dev->usb_err = ret;
 123         }
 124 }
 125
 126 /* -- send a bulk value -- */
 127 static void snd_val(struct gspca_dev *gspca_dev,
 128                         int ads,
 129                         unsigned int val)
 130 {
 131         struct usb_device *dev = gspca_dev->dev;
 132         int alen, ret;
 133         __u8 seq = 0;
 134
 135         if (ads == 0x003f08) {
 136                 reg_r(gspca_dev, 0x0704);
 137                 seq = reg_r(gspca_dev, 0x0705);
 138                 reg_r(gspca_dev, 0x0650);
 139                 reg_w(gspca_dev, 0x654, seq);
 140         } else {
 141                 reg_w(gspca_dev, 0x654, (ads >> 16) & 0xff);
 142         }
 143         reg_w(gspca_dev, 0x655, (ads >> 8) & 0xff);
 144         reg_w(gspca_dev, 0x656, ads & 0xff);
 145         reg_w(gspca_dev, 0x657, 0);
 146         reg_w(gspca_dev, 0x658, 0x04);  /* size */
 147         reg_w(gspca_dev, 0x659, 0);
 148         reg_w(gspca_dev, 0x65a, 0);
 149         reg_w(gspca_dev, 0x65b, 0);
 150         reg_w(gspca_dev, 0x650, 5);
 151         if (gspca_dev->usb_err < 0)
 152                 return;
 153         gspca_dev->usb_buf[0] = val >> 24;
 154         gspca_dev->usb_buf[1] = val >> 16;
 155         gspca_dev->usb_buf[2] = val >> 8;
 156         gspca_dev->usb_buf[3] = val;
 157         ret = usb_bulk_msg(dev,
 158                         usb_sndbulkpipe(dev, 6),
 159                         gspca_dev->usb_buf,
 160                         4,
 161                         &alen,
 162                         500);   /* timeout in milliseconds */
 163         if (ret < 0) {
 164                 pr_err("snd_val err %d\n", ret);
 165                 gspca_dev->usb_err = ret;
 166         } else {
 167                 if (ads == 0x003f08) {
 168                         seq += 4;
 169                         seq &= 0x3f;
 170                         reg_w(gspca_dev, 0x705, seq);
 171                 }
 172         }
 173 }
 174
 175 /* set a camera parameter */
 176 static void set_par(struct gspca_dev *gspca_dev,
 177                    int parval)
 178 {
 179         snd_val(gspca_dev, 0x003f08, parval);
 180 }
 181
 182 static void setbrightness(struct gspca_dev *gspca_dev, s32 val)
 183 {
 184         int parval;
 185
 186         parval = 0x06000000             /* whiteness */
 187                 + (val << 16);
 188         set_par(gspca_dev, parval);
 189 }
 190
 191 static void setcontrast(struct gspca_dev *gspca_dev, s32 val)
 192 {
 193         int parval;
 194
 195         parval = 0x07000000             /* contrast */
 196                 + (val << 16);
 197         set_par(gspca_dev, parval);
 198 }
 199
 200 static void setcolors(struct gspca_dev *gspca_dev, s32 val)
 201 {
 202         int parval;
 203
 204         parval = 0x08000000             /* saturation */
 205                 + (val << 16);
 206         set_par(gspca_dev, parval);
 207 }
 208
 209 static void setlightfreq(struct gspca_dev *gspca_dev, s32 val)
 210 {
 211         set_par(gspca_dev, val == 1
 212                         ? 0x33640000            /* 50 Hz */
 213                         : 0x33780000);          /* 60 Hz */
 214 }
 215
 216 /* this function is called at probe time */
 217 static int sd_config(struct gspca_dev *gspca_dev,
 218                         const struct usb_device_id *id)
 219 {
 220         gspca_dev->cam.cam_mode = vga_mode;
 221         gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
 222         return 0;
 223 }
 224
 225 /* this function is called at probe and resume time */
 226 static int sd_init(struct gspca_dev *gspca_dev)
 227 {
 228         u8 ret;
 229
 230         /* check if the device responds */
 231         usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1);
 232         ret = reg_r(gspca_dev, 0x0740);
 233         if (gspca_dev->usb_err >= 0) {
 234                 if (ret != 0xff) {
 235                         pr_err("init reg: 0x%02x\n", ret);
 236                         gspca_dev->usb_err = -EIO;
 237                 }
 238         }
 239         return gspca_dev->usb_err;
 240 }
 241
 242 /* -- start the camera -- */
 243 static int sd_start(struct gspca_dev *gspca_dev)
 244 {
 245         struct sd *sd = (struct sd *) gspca_dev;
 246         int ret, value;
 247
 248         /* create the JPEG header */
 249         jpeg_define(sd->jpeg_hdr, gspca_dev->pixfmt.height,
 250                         gspca_dev->pixfmt.width,
 251                         0x22);          /* JPEG 411 */
 252         jpeg_set_qual(sd->jpeg_hdr, QUALITY);
 253
 254         /* work on alternate 1 */
 255         usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1);
 256
 257         set_par(gspca_dev, 0x10000000);
 258         set_par(gspca_dev, 0x00000000);
 259         set_par(gspca_dev, 0x8002e001);
 260         set_par(gspca_dev, 0x14000000);
 261         if (gspca_dev->pixfmt.width > 320)
 262                 value = 0x8002e001;             /* 640x480 */
 263         else
 264                 value = 0x4001f000;             /* 320x240 */
 265         set_par(gspca_dev, value);
 266         ret = usb_set_interface(gspca_dev->dev,
 267                                         gspca_dev->iface,
 268                                         gspca_dev->alt);
 269         if (ret < 0) {
 270                 pr_err("set intf %d %d failed\n",
 271                        gspca_dev->iface, gspca_dev->alt);
 272                 gspca_dev->usb_err = ret;
 273                 goto out;
 274         }
 275         reg_r(gspca_dev, 0x0630);
 276         rcv_val(gspca_dev, 0x000020);   /* << (value ff ff ff ff) */
 277         reg_r(gspca_dev, 0x0650);
 278         snd_val(gspca_dev, 0x000020, 0xffffffff);
 279         reg_w(gspca_dev, 0x0620, 0);
 280         reg_w(gspca_dev, 0x0630, 0);
 281         reg_w(gspca_dev, 0x0640, 0);
 282         reg_w(gspca_dev, 0x0650, 0);
 283         reg_w(gspca_dev, 0x0660, 0);
 284         set_par(gspca_dev, 0x09800000);         /* Red ? */
 285         set_par(gspca_dev, 0x0a800000);         /* Green ? */
 286         set_par(gspca_dev, 0x0b800000);         /* Blue ? */
 287         set_par(gspca_dev, 0x0d030000);         /* Gamma ? */
 288
 289         /* start the video flow */
 290         set_par(gspca_dev, 0x01000000);
 291         set_par(gspca_dev, 0x01000000);
 292         if (gspca_dev->usb_err >= 0)
 293                 gspca_dbg(gspca_dev, D_STREAM, "camera started alt: 0x%02x\n",
 294                           gspca_dev->alt);
 295 out:
 296         return gspca_dev->usb_err;
 297 }
 298
 299 static void sd_stopN(struct gspca_dev *gspca_dev)
 300 {
 301         struct usb_device *dev = gspca_dev->dev;
 302
 303         set_par(gspca_dev, 0x02000000);
 304         set_par(gspca_dev, 0x02000000);
 305         usb_set_interface(dev, gspca_dev->iface, 1);
 306         reg_r(gspca_dev, 0x0630);
 307         rcv_val(gspca_dev, 0x000020);   /* << (value ff ff ff ff) */
 308         reg_r(gspca_dev, 0x0650);
 309         snd_val(gspca_dev, 0x000020, 0xffffffff);
 310         reg_w(gspca_dev, 0x0620, 0);
 311         reg_w(gspca_dev, 0x0630, 0);
 312         reg_w(gspca_dev, 0x0640, 0);
 313         reg_w(gspca_dev, 0x0650, 0);
 314         reg_w(gspca_dev, 0x0660, 0);
 315         gspca_dbg(gspca_dev, D_STREAM, "camera stopped\n");
 316 }
 317
 318 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 319                         u8 *data,                       /* isoc packet */
 320                         int len)                        /* iso packet length */
 321 {
 322         struct sd *sd = (struct sd *) gspca_dev;
 323         static unsigned char ffd9[] = {0xff, 0xd9};
 324
 325         /* a frame starts with:
 326          *      - 0xff 0xfe
 327          *      - 0x08 0x00     - length (little endian ?!)
 328          *      - 4 bytes = size of whole frame (BE - including header)
 329          *      - 0x00 0x0c
 330          *      - 0xff 0xd8
 331          *      - ..    JPEG image with escape sequences (ff 00)
 332          *              (without ending - ff d9)
 333          */
 334         if (data[0] == 0xff && data[1] == 0xfe) {
 335                 gspca_frame_add(gspca_dev, LAST_PACKET,
 336                                 ffd9, 2);
 337
 338                 /* put the JPEG 411 header */
 339                 gspca_frame_add(gspca_dev, FIRST_PACKET,
 340                         sd->jpeg_hdr, JPEG_HDR_SZ);
 341
 342                 /* beginning of the frame */
 343 #define STKHDRSZ 12
 344                 data += STKHDRSZ;
 345                 len -= STKHDRSZ;
 346         }
 347         gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
 348 }
 349
 350 static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
 351 {
 352         struct gspca_dev *gspca_dev =
 353                 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
 354
 355         gspca_dev->usb_err = 0;
 356
 357         if (!gspca_dev->streaming)
 358                 return 0;
 359
 360         switch (ctrl->id) {
 361         case V4L2_CID_BRIGHTNESS:
 362                 setbrightness(gspca_dev, ctrl->val);
 363                 break;
 364         case V4L2_CID_CONTRAST:
 365                 setcontrast(gspca_dev, ctrl->val);
 366                 break;
 367         case V4L2_CID_SATURATION:
 368                 setcolors(gspca_dev, ctrl->val);
 369                 break;
 370         case V4L2_CID_POWER_LINE_FREQUENCY:
 371                 setlightfreq(gspca_dev, ctrl->val);
 372                 break;
 373         }
 374         return gspca_dev->usb_err;
 375 }
 376
 377 static const struct v4l2_ctrl_ops sd_ctrl_ops = {
 378         .s_ctrl = sd_s_ctrl,
 379 };
 380
 381 static int sd_init_controls(struct gspca_dev *gspca_dev)
 382 {
 383         struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
 384
 385         gspca_dev->vdev.ctrl_handler = hdl;
 386         v4l2_ctrl_handler_init(hdl, 4);
 387         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 388                         V4L2_CID_BRIGHTNESS, 0, 255, 1, 127);
 389         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 390                         V4L2_CID_CONTRAST, 0, 255, 1, 127);
 391         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 392                         V4L2_CID_SATURATION, 0, 255, 1, 127);
 393         v4l2_ctrl_new_std_menu(hdl, &sd_ctrl_ops,
 394                         V4L2_CID_POWER_LINE_FREQUENCY,
 395                         V4L2_CID_POWER_LINE_FREQUENCY_60HZ, 1,
 396                         V4L2_CID_POWER_LINE_FREQUENCY_50HZ);
 397
 398         if (hdl->error) {
 399                 pr_err("Could not initialize controls\n");
 400                 return hdl->error;
 401         }
 402         return 0;
 403 }
 404
 405 /* sub-driver description */
 406 static const struct sd_desc sd_desc = {
 407         .name = MODULE_NAME,
 408         .config = sd_config,
 409         .init = sd_init,
 410         .init_controls = sd_init_controls,
 411         .start = sd_start,
 412         .stopN = sd_stopN,
 413         .pkt_scan = sd_pkt_scan,
 414 };
 415
 416 /* -- module initialisation -- */
 417 static const struct usb_device_id device_table[] = {
 418         {USB_DEVICE(0x05e1, 0x0893)},
 419         {}
 420 };
 421 MODULE_DEVICE_TABLE(usb, device_table);
 422
 423 /* -- device connect -- */
 424 static int sd_probe(struct usb_interface *intf,
 425                         const struct usb_device_id *id)
 426 {
 427         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 428                                 THIS_MODULE);
 429 }
 430
 431 static struct usb_driver sd_driver = {
 432         .name = MODULE_NAME,
 433         .id_table = device_table,
 434         .probe = sd_probe,
 435         .disconnect = gspca_disconnect,
 436 #ifdef CONFIG_PM
 437         .suspend = gspca_suspend,
 438         .resume = gspca_resume,
 439         .reset_resume = gspca_resume,
 440 #endif
 441 };
 442
 443 module_usb_driver(sd_driver);