drivers/media/usb/gspca/pac207.c

   1 /*
   2  * Pixart PAC207BCA library
   3  *
   4  * Copyright (C) 2008 Hans de Goede <hdegoede@redhat.com>
   5  * Copyright (C) 2005 Thomas Kaiser thomas@kaiser-linux.li
   6  * Copyleft (C) 2005 Michel Xhaard mxhaard@magic.fr
   7  *
   8  * V4L2 by Jean-Francois Moine <http://moinejf.free.fr>
   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  * 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
  26 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  27
  28 #define MODULE_NAME "pac207"
  29
  30 #include <linux/input.h>
  31 #include "gspca.h"
  32 /* Include pac common sof detection functions */
  33 #include "pac_common.h"
  34
  35 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
  36 MODULE_DESCRIPTION("Pixart PAC207");
  37 MODULE_LICENSE("GPL");
  38
  39 #define PAC207_CTRL_TIMEOUT             100  /* ms */
  40
  41 #define PAC207_BRIGHTNESS_MIN           0
  42 #define PAC207_BRIGHTNESS_MAX           255
  43 #define PAC207_BRIGHTNESS_DEFAULT       46
  44 #define PAC207_BRIGHTNESS_REG           0x08
  45
  46 #define PAC207_EXPOSURE_MIN             3
  47 #define PAC207_EXPOSURE_MAX             90 /* 1 sec expo time / 1 fps */
  48 #define PAC207_EXPOSURE_DEFAULT         5 /* power on default: 3 */
  49 #define PAC207_EXPOSURE_REG             0x02
  50
  51 #define PAC207_GAIN_MIN                 0
  52 #define PAC207_GAIN_MAX                 31
  53 #define PAC207_GAIN_DEFAULT             7 /* power on default: 9 */
  54 #define PAC207_GAIN_REG                 0x0e
  55
  56 #define PAC207_AUTOGAIN_DEADZONE        30
  57
  58 /* global parameters */
  59 static int led_invert;
  60 module_param(led_invert, int, 0644);
  61 MODULE_PARM_DESC(led_invert, "Invert led");
  62
  63 /* specific webcam descriptor */
  64 struct sd {
  65         struct gspca_dev gspca_dev;             /* !! must be the first item */
  66
  67         struct v4l2_ctrl *brightness;
  68
  69         u8 mode;
  70         u8 sof_read;
  71         u8 header_read;
  72         u8 autogain_ignore_frames;
  73
  74         atomic_t avg_lum;
  75 };
  76
  77 static const struct v4l2_pix_format sif_mode[] = {
  78         {176, 144, V4L2_PIX_FMT_PAC207, V4L2_FIELD_NONE,
  79                 .bytesperline = 176,
  80                 .sizeimage = (176 + 2) * 144,
  81                         /* uncompressed, add 2 bytes / line for line header */
  82                 .colorspace = V4L2_COLORSPACE_SRGB,
  83                 .priv = 1},
  84         {352, 288, V4L2_PIX_FMT_PAC207, V4L2_FIELD_NONE,
  85                 .bytesperline = 352,
  86                         /* compressed, but only when needed (not compressed
  87                            when the framerate is low) */
  88                 .sizeimage = (352 + 2) * 288,
  89                 .colorspace = V4L2_COLORSPACE_SRGB,
  90                 .priv = 0},
  91 };
  92
  93 static const __u8 pac207_sensor_init[][8] = {
  94         {0x10, 0x12, 0x0d, 0x12, 0x0c, 0x01, 0x29, 0x84},
  95         {0x49, 0x64, 0x64, 0x64, 0x04, 0x10, 0xf0, 0x30},
  96         {0x00, 0x00, 0x00, 0x70, 0xa0, 0xf8, 0x00, 0x00},
  97         {0x32, 0x00, 0x96, 0x00, 0xa2, 0x02, 0xaf, 0x00},
  98 };
  99
 100 static void pac207_write_regs(struct gspca_dev *gspca_dev, u16 index,
 101         const u8 *buffer, u16 length)
 102 {
 103         struct usb_device *udev = gspca_dev->dev;
 104         int err;
 105
 106         if (gspca_dev->usb_err < 0)
 107                 return;
 108
 109         memcpy(gspca_dev->usb_buf, buffer, length);
 110
 111         err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x01,
 112                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
 113                         0x00, index,
 114                         gspca_dev->usb_buf, length, PAC207_CTRL_TIMEOUT);
 115         if (err < 0) {
 116                 pr_err("Failed to write registers to index 0x%04X, error %d\n",
 117                        index, err);
 118                 gspca_dev->usb_err = err;
 119         }
 120 }
 121
 122 static void pac207_write_reg(struct gspca_dev *gspca_dev, u16 index, u16 value)
 123 {
 124         struct usb_device *udev = gspca_dev->dev;
 125         int err;
 126
 127         if (gspca_dev->usb_err < 0)
 128                 return;
 129
 130         err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00,
 131                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
 132                         value, index, NULL, 0, PAC207_CTRL_TIMEOUT);
 133         if (err) {
 134                 pr_err("Failed to write a register (index 0x%04X, value 0x%02X, error %d)\n",
 135                        index, value, err);
 136                 gspca_dev->usb_err = err;
 137         }
 138 }
 139
 140 static int pac207_read_reg(struct gspca_dev *gspca_dev, u16 index)
 141 {
 142         struct usb_device *udev = gspca_dev->dev;
 143         int res;
 144
 145         if (gspca_dev->usb_err < 0)
 146                 return 0;
 147
 148         res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00,
 149                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
 150                         0x00, index,
 151                         gspca_dev->usb_buf, 1, PAC207_CTRL_TIMEOUT);
 152         if (res < 0) {
 153                 pr_err("Failed to read a register (index 0x%04X, error %d)\n",
 154                        index, res);
 155                 gspca_dev->usb_err = res;
 156                 return 0;
 157         }
 158
 159         return gspca_dev->usb_buf[0];
 160 }
 161
 162 /* this function is called at probe time */
 163 static int sd_config(struct gspca_dev *gspca_dev,
 164                         const struct usb_device_id *id)
 165 {
 166         struct cam *cam;
 167         u8 idreg[2];
 168
 169         idreg[0] = pac207_read_reg(gspca_dev, 0x0000);
 170         idreg[1] = pac207_read_reg(gspca_dev, 0x0001);
 171         idreg[0] = ((idreg[0] & 0x0f) << 4) | ((idreg[1] & 0xf0) >> 4);
 172         idreg[1] = idreg[1] & 0x0f;
 173         PDEBUG(D_PROBE, "Pixart Sensor ID 0x%02X Chips ID 0x%02X",
 174                 idreg[0], idreg[1]);
 175
 176         if (idreg[0] != 0x27) {
 177                 PDEBUG(D_PROBE, "Error invalid sensor ID!");
 178                 return -ENODEV;
 179         }
 180
 181         PDEBUG(D_PROBE,
 182                 "Pixart PAC207BCA Image Processor and Control Chip detected"
 183                 " (vid/pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
 184
 185         cam = &gspca_dev->cam;
 186         cam->cam_mode = sif_mode;
 187         cam->nmodes = ARRAY_SIZE(sif_mode);
 188
 189         return 0;
 190 }
 191
 192 /* this function is called at probe and resume time */
 193 static int sd_init(struct gspca_dev *gspca_dev)
 194 {
 195         u8 mode;
 196
 197         /* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */
 198         if (led_invert)
 199                 mode = 0x02;
 200         else
 201                 mode = 0x00;
 202         pac207_write_reg(gspca_dev, 0x41, mode);
 203         pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */
 204
 205         return gspca_dev->usb_err;
 206 }
 207
 208 static void setcontrol(struct gspca_dev *gspca_dev, u16 reg, u16 val)
 209 {
 210         pac207_write_reg(gspca_dev, reg, val);
 211         pac207_write_reg(gspca_dev, 0x13, 0x01);        /* Bit 0, auto clear */
 212         pac207_write_reg(gspca_dev, 0x1c, 0x01);        /* not documented */
 213 }
 214
 215 static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
 216 {
 217         struct gspca_dev *gspca_dev =
 218                 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
 219         struct sd *sd = (struct sd *)gspca_dev;
 220
 221         gspca_dev->usb_err = 0;
 222
 223         if (ctrl->id == V4L2_CID_AUTOGAIN && ctrl->is_new && ctrl->val) {
 224                 /* when switching to autogain set defaults to make sure
 225                    we are on a valid point of the autogain gain /
 226                    exposure knee graph, and give this change time to
 227                    take effect before doing autogain. */
 228                 gspca_dev->exposure->val    = PAC207_EXPOSURE_DEFAULT;
 229                 gspca_dev->gain->val        = PAC207_GAIN_DEFAULT;
 230                 sd->autogain_ignore_frames  = PAC_AUTOGAIN_IGNORE_FRAMES;
 231         }
 232
 233         if (!gspca_dev->streaming)
 234                 return 0;
 235
 236         switch (ctrl->id) {
 237         case V4L2_CID_BRIGHTNESS:
 238                 setcontrol(gspca_dev, PAC207_BRIGHTNESS_REG, ctrl->val);
 239                 break;
 240         case V4L2_CID_AUTOGAIN:
 241                 if (gspca_dev->exposure->is_new || (ctrl->is_new && ctrl->val))
 242                         setcontrol(gspca_dev, PAC207_EXPOSURE_REG,
 243                                    gspca_dev->exposure->val);
 244                 if (gspca_dev->gain->is_new || (ctrl->is_new && ctrl->val))
 245                         setcontrol(gspca_dev, PAC207_GAIN_REG,
 246                                    gspca_dev->gain->val);
 247                 break;
 248         default:
 249                 return -EINVAL;
 250         }
 251         return gspca_dev->usb_err;
 252 }
 253
 254 static const struct v4l2_ctrl_ops sd_ctrl_ops = {
 255         .s_ctrl = sd_s_ctrl,
 256 };
 257
 258 /* this function is called at probe time */
 259 static int sd_init_controls(struct gspca_dev *gspca_dev)
 260 {
 261         struct sd *sd = (struct sd *) gspca_dev;
 262         struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
 263
 264         gspca_dev->vdev.ctrl_handler = hdl;
 265         v4l2_ctrl_handler_init(hdl, 4);
 266
 267         sd->brightness = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 268                                 V4L2_CID_BRIGHTNESS,
 269                                 PAC207_BRIGHTNESS_MIN, PAC207_BRIGHTNESS_MAX,
 270                                 1, PAC207_BRIGHTNESS_DEFAULT);
 271         gspca_dev->autogain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 272                                 V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
 273         gspca_dev->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 274                                 V4L2_CID_EXPOSURE,
 275                                 PAC207_EXPOSURE_MIN, PAC207_EXPOSURE_MAX,
 276                                 1, PAC207_EXPOSURE_DEFAULT);
 277         gspca_dev->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 278                                 V4L2_CID_GAIN,
 279                                 PAC207_GAIN_MIN, PAC207_GAIN_MAX,
 280                                 1, PAC207_GAIN_DEFAULT);
 281         if (hdl->error) {
 282                 pr_err("Could not initialize controls\n");
 283                 return hdl->error;
 284         }
 285         v4l2_ctrl_auto_cluster(3, &gspca_dev->autogain, 0, false);
 286         return 0;
 287 }
 288
 289 /* -- start the camera -- */
 290 static int sd_start(struct gspca_dev *gspca_dev)
 291 {
 292         struct sd *sd = (struct sd *) gspca_dev;
 293         __u8 mode;
 294
 295         pac207_write_reg(gspca_dev, 0x0f, 0x10); /* Power control (Bit 6-0) */
 296         pac207_write_regs(gspca_dev, 0x0002, pac207_sensor_init[0], 8);
 297         pac207_write_regs(gspca_dev, 0x000a, pac207_sensor_init[1], 8);
 298         pac207_write_regs(gspca_dev, 0x0012, pac207_sensor_init[2], 8);
 299         pac207_write_regs(gspca_dev, 0x0042, pac207_sensor_init[3], 8);
 300
 301         /* Compression Balance */
 302         if (gspca_dev->pixfmt.width == 176)
 303                 pac207_write_reg(gspca_dev, 0x4a, 0xff);
 304         else
 305                 pac207_write_reg(gspca_dev, 0x4a, 0x30);
 306         pac207_write_reg(gspca_dev, 0x4b, 0x00); /* Sram test value */
 307         pac207_write_reg(gspca_dev, 0x08, v4l2_ctrl_g_ctrl(sd->brightness));
 308
 309         /* PGA global gain (Bit 4-0) */
 310         pac207_write_reg(gspca_dev, 0x0e,
 311                 v4l2_ctrl_g_ctrl(gspca_dev->gain));
 312         pac207_write_reg(gspca_dev, 0x02,
 313                 v4l2_ctrl_g_ctrl(gspca_dev->exposure)); /* PXCK = 12MHz /n */
 314
 315         /* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */
 316         if (led_invert)
 317                 mode = 0x00;
 318         else
 319                 mode = 0x02;
 320         if (gspca_dev->pixfmt.width == 176) {   /* 176x144 */
 321                 mode |= 0x01;
 322                 PDEBUG(D_STREAM, "pac207_start mode 176x144");
 323         } else {                                /* 352x288 */
 324                 PDEBUG(D_STREAM, "pac207_start mode 352x288");
 325         }
 326         pac207_write_reg(gspca_dev, 0x41, mode);
 327
 328         pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */
 329         pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */
 330         msleep(10);
 331         pac207_write_reg(gspca_dev, 0x40, 0x01); /* Start ISO pipe */
 332
 333         sd->sof_read = 0;
 334         sd->autogain_ignore_frames = 0;
 335         atomic_set(&sd->avg_lum, -1);
 336         return gspca_dev->usb_err;
 337 }
 338
 339 static void sd_stopN(struct gspca_dev *gspca_dev)
 340 {
 341         u8 mode;
 342
 343         /* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */
 344         if (led_invert)
 345                 mode = 0x02;
 346         else
 347                 mode = 0x00;
 348         pac207_write_reg(gspca_dev, 0x40, 0x00); /* Stop ISO pipe */
 349         pac207_write_reg(gspca_dev, 0x41, mode); /* Turn off LED */
 350         pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */
 351 }
 352
 353
 354 static void pac207_do_auto_gain(struct gspca_dev *gspca_dev)
 355 {
 356         struct sd *sd = (struct sd *) gspca_dev;
 357         int avg_lum = atomic_read(&sd->avg_lum);
 358
 359         if (avg_lum == -1)
 360                 return;
 361
 362         if (sd->autogain_ignore_frames > 0)
 363                 sd->autogain_ignore_frames--;
 364         else if (gspca_coarse_grained_expo_autogain(gspca_dev, avg_lum,
 365                         90, PAC207_AUTOGAIN_DEADZONE))
 366                 sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES;
 367 }
 368
 369 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 370                         u8 *data,
 371                         int len)
 372 {
 373         struct sd *sd = (struct sd *) gspca_dev;
 374         unsigned char *sof;
 375
 376         sof = pac_find_sof(gspca_dev, &sd->sof_read, data, len);
 377         if (sof) {
 378                 int n;
 379
 380                 /* finish decoding current frame */
 381                 n = sof - data;
 382                 if (n > sizeof pac_sof_marker)
 383                         n -= sizeof pac_sof_marker;
 384                 else
 385                         n = 0;
 386                 gspca_frame_add(gspca_dev, LAST_PACKET,
 387                                 data, n);
 388                 sd->header_read = 0;
 389                 gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
 390                 len -= sof - data;
 391                 data = sof;
 392         }
 393         if (sd->header_read < 11) {
 394                 int needed;
 395
 396                 /* get average lumination from frame header (byte 5) */
 397                 if (sd->header_read < 5) {
 398                         needed = 5 - sd->header_read;
 399                         if (len >= needed)
 400                                 atomic_set(&sd->avg_lum, data[needed - 1]);
 401                 }
 402                 /* skip the rest of the header */
 403                 needed = 11 - sd->header_read;
 404                 if (len <= needed) {
 405                         sd->header_read += len;
 406                         return;
 407                 }
 408                 data += needed;
 409                 len -= needed;
 410                 sd->header_read = 11;
 411         }
 412
 413         gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
 414 }
 415
 416 #if IS_ENABLED(CONFIG_INPUT)
 417 static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
 418                         u8 *data,               /* interrupt packet data */
 419                         int len)                /* interrupt packet length */
 420 {
 421         int ret = -EINVAL;
 422
 423         if (len == 2 && data[0] == 0x5a && data[1] == 0x5a) {
 424                 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
 425                 input_sync(gspca_dev->input_dev);
 426                 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
 427                 input_sync(gspca_dev->input_dev);
 428                 ret = 0;
 429         }
 430
 431         return ret;
 432 }
 433 #endif
 434
 435 /* sub-driver description */
 436 static const struct sd_desc sd_desc = {
 437         .name = MODULE_NAME,
 438         .config = sd_config,
 439         .init = sd_init,
 440         .init_controls = sd_init_controls,
 441         .start = sd_start,
 442         .stopN = sd_stopN,
 443         .dq_callback = pac207_do_auto_gain,
 444         .pkt_scan = sd_pkt_scan,
 445 #if IS_ENABLED(CONFIG_INPUT)
 446         .int_pkt_scan = sd_int_pkt_scan,
 447 #endif
 448 };
 449
 450 /* -- module initialisation -- */
 451 static const struct usb_device_id device_table[] = {
 452         {USB_DEVICE(0x041e, 0x4028)},
 453         {USB_DEVICE(0x093a, 0x2460)},
 454         {USB_DEVICE(0x093a, 0x2461)},
 455         {USB_DEVICE(0x093a, 0x2463)},
 456         {USB_DEVICE(0x093a, 0x2464)},
 457         {USB_DEVICE(0x093a, 0x2468)},
 458         {USB_DEVICE(0x093a, 0x2470)},
 459         {USB_DEVICE(0x093a, 0x2471)},
 460         {USB_DEVICE(0x093a, 0x2472)},
 461         {USB_DEVICE(0x093a, 0x2474)},
 462         {USB_DEVICE(0x093a, 0x2476)},
 463         {USB_DEVICE(0x145f, 0x013a)},
 464         {USB_DEVICE(0x2001, 0xf115)},
 465         {}
 466 };
 467 MODULE_DEVICE_TABLE(usb, device_table);
 468
 469 /* -- device connect -- */
 470 static int sd_probe(struct usb_interface *intf,
 471                         const struct usb_device_id *id)
 472 {
 473         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 474                                 THIS_MODULE);
 475 }
 476
 477 static struct usb_driver sd_driver = {
 478         .name = MODULE_NAME,
 479         .id_table = device_table,
 480         .probe = sd_probe,
 481         .disconnect = gspca_disconnect,
 482 #ifdef CONFIG_PM
 483         .suspend = gspca_suspend,
 484         .resume = gspca_resume,
 485         .reset_resume = gspca_resume,
 486 #endif
 487 };
 488
 489 module_usb_driver(sd_driver);