drivers/media/video/gspca/jeilinj.c

   1 /*
   2  * Jeilinj subdriver
   3  *
   4  * Supports some Jeilin dual-mode cameras which use bulk transport and
   5  * download raw JPEG data.
   6  *
   7  * Copyright (C) 2009 Theodore Kilgore
   8  *
   9  * Sportscam DV15 support and control settings are
  10  * Copyright (C) 2011 Patrice Chotard
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  25  */
  26
  27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  28
  29 #define MODULE_NAME "jeilinj"
  30
  31 #include <linux/slab.h>
  32 #include "gspca.h"
  33 #include "jpeg.h"
  34
  35 MODULE_AUTHOR("Theodore Kilgore <kilgota@auburn.edu>");
  36 MODULE_DESCRIPTION("GSPCA/JEILINJ USB Camera Driver");
  37 MODULE_LICENSE("GPL");
  38
  39 /* Default timeouts, in ms */
  40 #define JEILINJ_CMD_TIMEOUT 500
  41 #define JEILINJ_CMD_DELAY 160
  42 #define JEILINJ_DATA_TIMEOUT 1000
  43
  44 /* Maximum transfer size to use. */
  45 #define JEILINJ_MAX_TRANSFER 0x200
  46 #define FRAME_HEADER_LEN 0x10
  47 #define FRAME_START 0xFFFFFFFF
  48
  49 enum {
  50         SAKAR_57379,
  51         SPORTSCAM_DV15,
  52 };
  53
  54 #define CAMQUALITY_MIN 0        /* highest cam quality */
  55 #define CAMQUALITY_MAX 97       /* lowest cam quality  */
  56
  57 /* Structure to hold all of our device specific stuff */
  58 struct sd {
  59         struct gspca_dev gspca_dev;     /* !! must be the first item */
  60         int blocks_left;
  61         const struct v4l2_pix_format *cap_mode;
  62         struct v4l2_ctrl *freq;
  63         struct v4l2_ctrl *jpegqual;
  64         /* Driver stuff */
  65         u8 type;
  66         u8 quality;                              /* image quality */
  67 #define QUALITY_MIN 35
  68 #define QUALITY_MAX 85
  69 #define QUALITY_DEF 85
  70         u8 jpeg_hdr[JPEG_HDR_SZ];
  71 };
  72
  73 struct jlj_command {
  74         unsigned char instruction[2];
  75         unsigned char ack_wanted;
  76         unsigned char delay;
  77 };
  78
  79 /* AFAICT these cameras will only do 320x240. */
  80 static struct v4l2_pix_format jlj_mode[] = {
  81         { 320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
  82                 .bytesperline = 320,
  83                 .sizeimage = 320 * 240,
  84                 .colorspace = V4L2_COLORSPACE_JPEG,
  85                 .priv = 0},
  86         { 640, 480, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
  87                 .bytesperline = 640,
  88                 .sizeimage = 640 * 480,
  89                 .colorspace = V4L2_COLORSPACE_JPEG,
  90                 .priv = 0}
  91 };
  92
  93 /*
  94  * cam uses endpoint 0x03 to send commands, 0x84 for read commands,
  95  * and 0x82 for bulk transfer.
  96  */
  97
  98 /* All commands are two bytes only */
  99 static void jlj_write2(struct gspca_dev *gspca_dev, unsigned char *command)
 100 {
 101         int retval;
 102
 103         if (gspca_dev->usb_err < 0)
 104                 return;
 105         memcpy(gspca_dev->usb_buf, command, 2);
 106         retval = usb_bulk_msg(gspca_dev->dev,
 107                         usb_sndbulkpipe(gspca_dev->dev, 3),
 108                         gspca_dev->usb_buf, 2, NULL, 500);
 109         if (retval < 0) {
 110                 pr_err("command write [%02x] error %d\n",
 111                        gspca_dev->usb_buf[0], retval);
 112                 gspca_dev->usb_err = retval;
 113         }
 114 }
 115
 116 /* Responses are one byte only */
 117 static void jlj_read1(struct gspca_dev *gspca_dev, unsigned char response)
 118 {
 119         int retval;
 120
 121         if (gspca_dev->usb_err < 0)
 122                 return;
 123         retval = usb_bulk_msg(gspca_dev->dev,
 124         usb_rcvbulkpipe(gspca_dev->dev, 0x84),
 125                                 gspca_dev->usb_buf, 1, NULL, 500);
 126         response = gspca_dev->usb_buf[0];
 127         if (retval < 0) {
 128                 pr_err("read command [%02x] error %d\n",
 129                        gspca_dev->usb_buf[0], retval);
 130                 gspca_dev->usb_err = retval;
 131         }
 132 }
 133
 134 static void setfreq(struct gspca_dev *gspca_dev, s32 val)
 135 {
 136         u8 freq_commands[][2] = {
 137                 {0x71, 0x80},
 138                 {0x70, 0x07}
 139         };
 140
 141         freq_commands[0][1] |= val >> 1;
 142
 143         jlj_write2(gspca_dev, freq_commands[0]);
 144         jlj_write2(gspca_dev, freq_commands[1]);
 145 }
 146
 147 static void setcamquality(struct gspca_dev *gspca_dev, s32 val)
 148 {
 149         u8 quality_commands[][2] = {
 150                 {0x71, 0x1E},
 151                 {0x70, 0x06}
 152         };
 153         u8 camquality;
 154
 155         /* adapt camera quality from jpeg quality */
 156         camquality = ((QUALITY_MAX - val) * CAMQUALITY_MAX)
 157                 / (QUALITY_MAX - QUALITY_MIN);
 158         quality_commands[0][1] += camquality;
 159
 160         jlj_write2(gspca_dev, quality_commands[0]);
 161         jlj_write2(gspca_dev, quality_commands[1]);
 162 }
 163
 164 static void setautogain(struct gspca_dev *gspca_dev, s32 val)
 165 {
 166         u8 autogain_commands[][2] = {
 167                 {0x94, 0x02},
 168                 {0xcf, 0x00}
 169         };
 170
 171         autogain_commands[1][1] = val << 4;
 172
 173         jlj_write2(gspca_dev, autogain_commands[0]);
 174         jlj_write2(gspca_dev, autogain_commands[1]);
 175 }
 176
 177 static void setred(struct gspca_dev *gspca_dev, s32 val)
 178 {
 179         u8 setred_commands[][2] = {
 180                 {0x94, 0x02},
 181                 {0xe6, 0x00}
 182         };
 183
 184         setred_commands[1][1] = val;
 185
 186         jlj_write2(gspca_dev, setred_commands[0]);
 187         jlj_write2(gspca_dev, setred_commands[1]);
 188 }
 189
 190 static void setgreen(struct gspca_dev *gspca_dev, s32 val)
 191 {
 192         u8 setgreen_commands[][2] = {
 193                 {0x94, 0x02},
 194                 {0xe7, 0x00}
 195         };
 196
 197         setgreen_commands[1][1] = val;
 198
 199         jlj_write2(gspca_dev, setgreen_commands[0]);
 200         jlj_write2(gspca_dev, setgreen_commands[1]);
 201 }
 202
 203 static void setblue(struct gspca_dev *gspca_dev, s32 val)
 204 {
 205         u8 setblue_commands[][2] = {
 206                 {0x94, 0x02},
 207                 {0xe9, 0x00}
 208         };
 209
 210         setblue_commands[1][1] = val;
 211
 212         jlj_write2(gspca_dev, setblue_commands[0]);
 213         jlj_write2(gspca_dev, setblue_commands[1]);
 214 }
 215
 216 static int jlj_start(struct gspca_dev *gspca_dev)
 217 {
 218         int i;
 219         int start_commands_size;
 220         u8 response = 0xff;
 221         struct sd *sd = (struct sd *) gspca_dev;
 222         struct jlj_command start_commands[] = {
 223                 {{0x71, 0x81}, 0, 0},
 224                 {{0x70, 0x05}, 0, JEILINJ_CMD_DELAY},
 225                 {{0x95, 0x70}, 1, 0},
 226                 {{0x71, 0x81 - gspca_dev->curr_mode}, 0, 0},
 227                 {{0x70, 0x04}, 0, JEILINJ_CMD_DELAY},
 228                 {{0x95, 0x70}, 1, 0},
 229                 {{0x71, 0x00}, 0, 0},   /* start streaming ??*/
 230                 {{0x70, 0x08}, 0, JEILINJ_CMD_DELAY},
 231                 {{0x95, 0x70}, 1, 0},
 232 #define SPORTSCAM_DV15_CMD_SIZE 9
 233                 {{0x94, 0x02}, 0, 0},
 234                 {{0xde, 0x24}, 0, 0},
 235                 {{0x94, 0x02}, 0, 0},
 236                 {{0xdd, 0xf0}, 0, 0},
 237                 {{0x94, 0x02}, 0, 0},
 238                 {{0xe3, 0x2c}, 0, 0},
 239                 {{0x94, 0x02}, 0, 0},
 240                 {{0xe4, 0x00}, 0, 0},
 241                 {{0x94, 0x02}, 0, 0},
 242                 {{0xe5, 0x00}, 0, 0},
 243                 {{0x94, 0x02}, 0, 0},
 244                 {{0xe6, 0x2c}, 0, 0},
 245                 {{0x94, 0x03}, 0, 0},
 246                 {{0xaa, 0x00}, 0, 0}
 247         };
 248
 249         sd->blocks_left = 0;
 250         /* Under Windows, USB spy shows that only the 9 first start
 251          * commands are used for SPORTSCAM_DV15 webcam
 252          */
 253         if (sd->type == SPORTSCAM_DV15)
 254                 start_commands_size = SPORTSCAM_DV15_CMD_SIZE;
 255         else
 256                 start_commands_size = ARRAY_SIZE(start_commands);
 257
 258         for (i = 0; i < start_commands_size; i++) {
 259                 jlj_write2(gspca_dev, start_commands[i].instruction);
 260                 if (start_commands[i].delay)
 261                         msleep(start_commands[i].delay);
 262                 if (start_commands[i].ack_wanted)
 263                         jlj_read1(gspca_dev, response);
 264         }
 265         setcamquality(gspca_dev, v4l2_ctrl_g_ctrl(sd->jpegqual));
 266         msleep(2);
 267         setfreq(gspca_dev, v4l2_ctrl_g_ctrl(sd->freq));
 268         if (gspca_dev->usb_err < 0)
 269                 PDEBUG(D_ERR, "Start streaming command failed");
 270         return gspca_dev->usb_err;
 271 }
 272
 273 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 274                         u8 *data, int len)
 275 {
 276         struct sd *sd = (struct sd *) gspca_dev;
 277         int packet_type;
 278         u32 header_marker;
 279
 280         PDEBUG(D_STREAM, "Got %d bytes out of %d for Block 0",
 281                         len, JEILINJ_MAX_TRANSFER);
 282         if (len != JEILINJ_MAX_TRANSFER) {
 283                 PDEBUG(D_PACK, "bad length");
 284                 goto discard;
 285         }
 286         /* check if it's start of frame */
 287         header_marker = ((u32 *)data)[0];
 288         if (header_marker == FRAME_START) {
 289                 sd->blocks_left = data[0x0a] - 1;
 290                 PDEBUG(D_STREAM, "blocks_left = 0x%x", sd->blocks_left);
 291                 /* Start a new frame, and add the JPEG header, first thing */
 292                 gspca_frame_add(gspca_dev, FIRST_PACKET,
 293                                 sd->jpeg_hdr, JPEG_HDR_SZ);
 294                 /* Toss line 0 of data block 0, keep the rest. */
 295                 gspca_frame_add(gspca_dev, INTER_PACKET,
 296                                 data + FRAME_HEADER_LEN,
 297                                 JEILINJ_MAX_TRANSFER - FRAME_HEADER_LEN);
 298         } else if (sd->blocks_left > 0) {
 299                 PDEBUG(D_STREAM, "%d blocks remaining for frame",
 300                                 sd->blocks_left);
 301                 sd->blocks_left -= 1;
 302                 if (sd->blocks_left == 0)
 303                         packet_type = LAST_PACKET;
 304                 else
 305                         packet_type = INTER_PACKET;
 306                 gspca_frame_add(gspca_dev, packet_type,
 307                                 data, JEILINJ_MAX_TRANSFER);
 308         } else
 309                 goto discard;
 310         return;
 311 discard:
 312         /* Discard data until a new frame starts. */
 313         gspca_dev->last_packet_type = DISCARD_PACKET;
 314 }
 315
 316 /* This function is called at probe time just before sd_init */
 317 static int sd_config(struct gspca_dev *gspca_dev,
 318                 const struct usb_device_id *id)
 319 {
 320         struct cam *cam = &gspca_dev->cam;
 321         struct sd *dev  = (struct sd *) gspca_dev;
 322
 323         dev->type = id->driver_info;
 324         dev->quality = QUALITY_DEF;
 325
 326         cam->cam_mode = jlj_mode;
 327         cam->nmodes = ARRAY_SIZE(jlj_mode);
 328         cam->bulk = 1;
 329         cam->bulk_nurbs = 1;
 330         cam->bulk_size = JEILINJ_MAX_TRANSFER;
 331         return 0;
 332 }
 333
 334 static void sd_stopN(struct gspca_dev *gspca_dev)
 335 {
 336         int i;
 337         u8 *buf;
 338         static u8 stop_commands[][2] = {
 339                 {0x71, 0x00},
 340                 {0x70, 0x09},
 341                 {0x71, 0x80},
 342                 {0x70, 0x05}
 343         };
 344
 345         for (;;) {
 346                 /* get the image remaining blocks */
 347                 usb_bulk_msg(gspca_dev->dev,
 348                                 gspca_dev->urb[0]->pipe,
 349                                 gspca_dev->urb[0]->transfer_buffer,
 350                                 JEILINJ_MAX_TRANSFER, NULL,
 351                                 JEILINJ_DATA_TIMEOUT);
 352
 353                 /* search for 0xff 0xd9  (EOF for JPEG) */
 354                 i = 0;
 355                 buf = gspca_dev->urb[0]->transfer_buffer;
 356                 while ((i < (JEILINJ_MAX_TRANSFER - 1)) &&
 357                         ((buf[i] != 0xff) || (buf[i+1] != 0xd9)))
 358                         i++;
 359
 360                 if (i != (JEILINJ_MAX_TRANSFER - 1))
 361                         /* last remaining block found */
 362                         break;
 363                 }
 364
 365         for (i = 0; i < ARRAY_SIZE(stop_commands); i++)
 366                 jlj_write2(gspca_dev, stop_commands[i]);
 367 }
 368
 369 /* this function is called at probe and resume time */
 370 static int sd_init(struct gspca_dev *gspca_dev)
 371 {
 372         return gspca_dev->usb_err;
 373 }
 374
 375 /* Set up for getting frames. */
 376 static int sd_start(struct gspca_dev *gspca_dev)
 377 {
 378         struct sd *dev = (struct sd *) gspca_dev;
 379
 380         /* create the JPEG header */
 381         jpeg_define(dev->jpeg_hdr, gspca_dev->height, gspca_dev->width,
 382                         0x21);          /* JPEG 422 */
 383         jpeg_set_qual(dev->jpeg_hdr, dev->quality);
 384         PDEBUG(D_STREAM, "Start streaming at %dx%d",
 385                 gspca_dev->height, gspca_dev->width);
 386         jlj_start(gspca_dev);
 387         return gspca_dev->usb_err;
 388 }
 389
 390 /* Table of supported USB devices */
 391 static const struct usb_device_id device_table[] = {
 392         {USB_DEVICE(0x0979, 0x0280), .driver_info = SAKAR_57379},
 393         {USB_DEVICE(0x0979, 0x0270), .driver_info = SPORTSCAM_DV15},
 394         {}
 395 };
 396
 397 MODULE_DEVICE_TABLE(usb, device_table);
 398
 399 static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
 400 {
 401         struct gspca_dev *gspca_dev =
 402                 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
 403         struct sd *sd = (struct sd *)gspca_dev;
 404
 405         gspca_dev->usb_err = 0;
 406
 407         if (!gspca_dev->streaming)
 408                 return 0;
 409
 410         switch (ctrl->id) {
 411         case V4L2_CID_POWER_LINE_FREQUENCY:
 412                 setfreq(gspca_dev, ctrl->val);
 413                 break;
 414         case V4L2_CID_RED_BALANCE:
 415                 setred(gspca_dev, ctrl->val);
 416                 break;
 417         case V4L2_CID_GAIN:
 418                 setgreen(gspca_dev, ctrl->val);
 419                 break;
 420         case V4L2_CID_BLUE_BALANCE:
 421                 setblue(gspca_dev, ctrl->val);
 422                 break;
 423         case V4L2_CID_AUTOGAIN:
 424                 setautogain(gspca_dev, ctrl->val);
 425                 break;
 426         case V4L2_CID_JPEG_COMPRESSION_QUALITY:
 427                 jpeg_set_qual(sd->jpeg_hdr, ctrl->val);
 428                 setcamquality(gspca_dev, ctrl->val);
 429                 break;
 430         }
 431         return gspca_dev->usb_err;
 432 }
 433
 434 static const struct v4l2_ctrl_ops sd_ctrl_ops = {
 435         .s_ctrl = sd_s_ctrl,
 436 };
 437
 438 static int sd_init_controls(struct gspca_dev *gspca_dev)
 439 {
 440         struct sd *sd = (struct sd *)gspca_dev;
 441         struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
 442         static const struct v4l2_ctrl_config custom_autogain = {
 443                 .ops = &sd_ctrl_ops,
 444                 .id = V4L2_CID_AUTOGAIN,
 445                 .type = V4L2_CTRL_TYPE_INTEGER,
 446                 .name = "Automatic Gain (and Exposure)",
 447                 .max = 3,
 448                 .step = 1,
 449                 .def = 0,
 450         };
 451
 452         gspca_dev->vdev.ctrl_handler = hdl;
 453         v4l2_ctrl_handler_init(hdl, 6);
 454         sd->freq = v4l2_ctrl_new_std_menu(hdl, &sd_ctrl_ops,
 455                         V4L2_CID_POWER_LINE_FREQUENCY,
 456                         V4L2_CID_POWER_LINE_FREQUENCY_60HZ, 1,
 457                         V4L2_CID_POWER_LINE_FREQUENCY_60HZ);
 458         v4l2_ctrl_new_custom(hdl, &custom_autogain, NULL);
 459         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 460                         V4L2_CID_RED_BALANCE, 0, 3, 1, 2);
 461         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 462                         V4L2_CID_GAIN, 0, 3, 1, 2);
 463         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 464                         V4L2_CID_BLUE_BALANCE, 0, 3, 1, 2);
 465         sd->jpegqual = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 466                         V4L2_CID_JPEG_COMPRESSION_QUALITY,
 467                         QUALITY_MIN, QUALITY_MAX, 1, QUALITY_DEF);
 468
 469         if (hdl->error) {
 470                 pr_err("Could not initialize controls\n");
 471                 return hdl->error;
 472         }
 473         return 0;
 474 }
 475
 476 static int sd_set_jcomp(struct gspca_dev *gspca_dev,
 477                         struct v4l2_jpegcompression *jcomp)
 478 {
 479         struct sd *sd = (struct sd *) gspca_dev;
 480
 481         v4l2_ctrl_s_ctrl(sd->jpegqual, jcomp->quality);
 482         return 0;
 483 }
 484
 485 static int sd_get_jcomp(struct gspca_dev *gspca_dev,
 486                         struct v4l2_jpegcompression *jcomp)
 487 {
 488         struct sd *sd = (struct sd *) gspca_dev;
 489
 490         memset(jcomp, 0, sizeof *jcomp);
 491         jcomp->quality = v4l2_ctrl_g_ctrl(sd->jpegqual);
 492         jcomp->jpeg_markers = V4L2_JPEG_MARKER_DHT
 493                         | V4L2_JPEG_MARKER_DQT;
 494         return 0;
 495 }
 496
 497
 498 /* sub-driver description */
 499 static const struct sd_desc sd_desc_sakar_57379 = {
 500         .name   = MODULE_NAME,
 501         .config = sd_config,
 502         .init   = sd_init,
 503         .start  = sd_start,
 504         .stopN  = sd_stopN,
 505         .pkt_scan = sd_pkt_scan,
 506 };
 507
 508 /* sub-driver description */
 509 static const struct sd_desc sd_desc_sportscam_dv15 = {
 510         .name   = MODULE_NAME,
 511         .config = sd_config,
 512         .init   = sd_init,
 513         .init_controls = sd_init_controls,
 514         .start  = sd_start,
 515         .stopN  = sd_stopN,
 516         .pkt_scan = sd_pkt_scan,
 517         .get_jcomp = sd_get_jcomp,
 518         .set_jcomp = sd_set_jcomp,
 519 };
 520
 521 static const struct sd_desc *sd_desc[2] = {
 522         &sd_desc_sakar_57379,
 523         &sd_desc_sportscam_dv15
 524 };
 525
 526 /* -- device connect -- */
 527 static int sd_probe(struct usb_interface *intf,
 528                 const struct usb_device_id *id)
 529 {
 530         return gspca_dev_probe(intf, id,
 531                         sd_desc[id->driver_info],
 532                         sizeof(struct sd),
 533                         THIS_MODULE);
 534 }
 535
 536 static struct usb_driver sd_driver = {
 537         .name       = MODULE_NAME,
 538         .id_table   = device_table,
 539         .probe      = sd_probe,
 540         .disconnect = gspca_disconnect,
 541 #ifdef CONFIG_PM
 542         .suspend = gspca_suspend,
 543         .resume  = gspca_resume,
 544         .reset_resume = gspca_resume,
 545 #endif
 546 };
 547
 548 module_usb_driver(sd_driver);