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  */
  21
  22 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  23
  24 #define MODULE_NAME "pac207"
  25
  26 #include <linux/input.h>
  27 #include "gspca.h"
  28 /* Include pac common sof detection functions */
  29 #include "pac_common.h"
  30
  31 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
  32 MODULE_DESCRIPTION("Pixart PAC207");
  33 MODULE_LICENSE("GPL");
  34
  35 #define PAC207_CTRL_TIMEOUT             100  /* ms */
  36
  37 #define PAC207_BRIGHTNESS_MIN           0
  38 #define PAC207_BRIGHTNESS_MAX           255
  39 #define PAC207_BRIGHTNESS_DEFAULT       46
  40 #define PAC207_BRIGHTNESS_REG           0x08
  41
  42 #define PAC207_EXPOSURE_MIN             3
  43 #define PAC207_EXPOSURE_MAX             90 /* 1 sec expo time / 1 fps */
  44 #define PAC207_EXPOSURE_DEFAULT         5 /* power on default: 3 */
  45 #define PAC207_EXPOSURE_REG             0x02
  46
  47 #define PAC207_GAIN_MIN                 0
  48 #define PAC207_GAIN_MAX                 31
  49 #define PAC207_GAIN_DEFAULT             7 /* power on default: 9 */
  50 #define PAC207_GAIN_REG                 0x0e
  51
  52 #define PAC207_AUTOGAIN_DEADZONE        30
  53
  54 /* global parameters */
  55 static int led_invert;
  56 module_param(led_invert, int, 0644);
  57 MODULE_PARM_DESC(led_invert, "Invert led");
  58
  59 /* specific webcam descriptor */
  60 struct sd {
  61         struct gspca_dev gspca_dev;             /* !! must be the first item */
  62
  63         struct v4l2_ctrl *brightness;
  64
  65         u8 mode;
  66         u8 sof_read;
  67         u8 header_read;
  68         u8 autogain_ignore_frames;
  69
  70         atomic_t avg_lum;
  71 };
  72
  73 static const struct v4l2_pix_format sif_mode[] = {
  74         {176, 144, V4L2_PIX_FMT_PAC207, V4L2_FIELD_NONE,
  75                 .bytesperline = 176,
  76                 .sizeimage = (176 + 2) * 144,
  77                         /* uncompressed, add 2 bytes / line for line header */
  78                 .colorspace = V4L2_COLORSPACE_SRGB,
  79                 .priv = 1},
  80         {352, 288, V4L2_PIX_FMT_PAC207, V4L2_FIELD_NONE,
  81                 .bytesperline = 352,
  82                         /* compressed, but only when needed (not compressed
  83                            when the framerate is low) */
  84                 .sizeimage = (352 + 2) * 288,
  85                 .colorspace = V4L2_COLORSPACE_SRGB,
  86                 .priv = 0},
  87 };
  88
  89 static const __u8 pac207_sensor_init[][8] = {
  90         {0x10, 0x12, 0x0d, 0x12, 0x0c, 0x01, 0x29, 0x84},
  91         {0x49, 0x64, 0x64, 0x64, 0x04, 0x10, 0xf0, 0x30},
  92         {0x00, 0x00, 0x00, 0x70, 0xa0, 0xf8, 0x00, 0x00},
  93         {0x32, 0x00, 0x96, 0x00, 0xa2, 0x02, 0xaf, 0x00},
  94 };
  95
  96 static void pac207_write_regs(struct gspca_dev *gspca_dev, u16 index,
  97         const u8 *buffer, u16 length)
  98 {
  99         struct usb_device *udev = gspca_dev->dev;
 100         int err;
 101
 102         if (gspca_dev->usb_err < 0)
 103                 return;
 104
 105         memcpy(gspca_dev->usb_buf, buffer, length);
 106
 107         err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x01,
 108                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
 109                         0x00, index,
 110                         gspca_dev->usb_buf, length, PAC207_CTRL_TIMEOUT);
 111         if (err < 0) {
 112                 pr_err("Failed to write registers to index 0x%04X, error %d\n",
 113                        index, err);
 114                 gspca_dev->usb_err = err;
 115         }
 116 }
 117
 118 static void pac207_write_reg(struct gspca_dev *gspca_dev, u16 index, u16 value)
 119 {
 120         struct usb_device *udev = gspca_dev->dev;
 121         int err;
 122
 123         if (gspca_dev->usb_err < 0)
 124                 return;
 125
 126         err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00,
 127                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
 128                         value, index, NULL, 0, PAC207_CTRL_TIMEOUT);
 129         if (err) {
 130                 pr_err("Failed to write a register (index 0x%04X, value 0x%02X, error %d)\n",
 131                        index, value, err);
 132                 gspca_dev->usb_err = err;
 133         }
 134 }
 135
 136 static int pac207_read_reg(struct gspca_dev *gspca_dev, u16 index)
 137 {
 138         struct usb_device *udev = gspca_dev->dev;
 139         int res;
 140
 141         if (gspca_dev->usb_err < 0)
 142                 return 0;
 143
 144         res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00,
 145                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
 146                         0x00, index,
 147                         gspca_dev->usb_buf, 1, PAC207_CTRL_TIMEOUT);
 148         if (res < 0) {
 149                 pr_err("Failed to read a register (index 0x%04X, error %d)\n",
 150                        index, res);
 151                 gspca_dev->usb_err = res;
 152                 return 0;
 153         }
 154
 155         return gspca_dev->usb_buf[0];
 156 }
 157
 158 /* this function is called at probe time */
 159 static int sd_config(struct gspca_dev *gspca_dev,
 160                         const struct usb_device_id *id)
 161 {
 162         struct cam *cam;
 163         u8 idreg[2];
 164
 165         idreg[0] = pac207_read_reg(gspca_dev, 0x0000);
 166         idreg[1] = pac207_read_reg(gspca_dev, 0x0001);
 167         idreg[0] = ((idreg[0] & 0x0f) << 4) | ((idreg[1] & 0xf0) >> 4);
 168         idreg[1] = idreg[1] & 0x0f;
 169         PDEBUG(D_PROBE, "Pixart Sensor ID 0x%02X Chips ID 0x%02X",
 170                 idreg[0], idreg[1]);
 171
 172         if (idreg[0] != 0x27) {
 173                 PDEBUG(D_PROBE, "Error invalid sensor ID!");
 174                 return -ENODEV;
 175         }
 176
 177         PDEBUG(D_PROBE,
 178                 "Pixart PAC207BCA Image Processor and Control Chip detected (vid/pid 0x%04X:0x%04X)",
 179                 id->idVendor, id->idProduct);
 180
 181         cam = &gspca_dev->cam;
 182         cam->cam_mode = sif_mode;
 183         cam->nmodes = ARRAY_SIZE(sif_mode);
 184
 185         return 0;
 186 }
 187
 188 /* this function is called at probe and resume time */
 189 static int sd_init(struct gspca_dev *gspca_dev)
 190 {
 191         u8 mode;
 192
 193         /* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */
 194         if (led_invert)
 195                 mode = 0x02;
 196         else
 197                 mode = 0x00;
 198         pac207_write_reg(gspca_dev, 0x41, mode);
 199         pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */
 200
 201         return gspca_dev->usb_err;
 202 }
 203
 204 static void setcontrol(struct gspca_dev *gspca_dev, u16 reg, u16 val)
 205 {
 206         pac207_write_reg(gspca_dev, reg, val);
 207         pac207_write_reg(gspca_dev, 0x13, 0x01);        /* Bit 0, auto clear */
 208         pac207_write_reg(gspca_dev, 0x1c, 0x01);        /* not documented */
 209 }
 210
 211 static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
 212 {
 213         struct gspca_dev *gspca_dev =
 214                 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
 215         struct sd *sd = (struct sd *)gspca_dev;
 216
 217         gspca_dev->usb_err = 0;
 218
 219         if (ctrl->id == V4L2_CID_AUTOGAIN && ctrl->is_new && ctrl->val) {
 220                 /* when switching to autogain set defaults to make sure
 221                    we are on a valid point of the autogain gain /
 222                    exposure knee graph, and give this change time to
 223                    take effect before doing autogain. */
 224                 gspca_dev->exposure->val    = PAC207_EXPOSURE_DEFAULT;
 225                 gspca_dev->gain->val        = PAC207_GAIN_DEFAULT;
 226                 sd->autogain_ignore_frames  = PAC_AUTOGAIN_IGNORE_FRAMES;
 227         }
 228
 229         if (!gspca_dev->streaming)
 230                 return 0;
 231
 232         switch (ctrl->id) {
 233         case V4L2_CID_BRIGHTNESS:
 234                 setcontrol(gspca_dev, PAC207_BRIGHTNESS_REG, ctrl->val);
 235                 break;
 236         case V4L2_CID_AUTOGAIN:
 237                 if (gspca_dev->exposure->is_new || (ctrl->is_new && ctrl->val))
 238                         setcontrol(gspca_dev, PAC207_EXPOSURE_REG,
 239                                    gspca_dev->exposure->val);
 240                 if (gspca_dev->gain->is_new || (ctrl->is_new && ctrl->val))
 241                         setcontrol(gspca_dev, PAC207_GAIN_REG,
 242                                    gspca_dev->gain->val);
 243                 break;
 244         default:
 245                 return -EINVAL;
 246         }
 247         return gspca_dev->usb_err;
 248 }
 249
 250 static const struct v4l2_ctrl_ops sd_ctrl_ops = {
 251         .s_ctrl = sd_s_ctrl,
 252 };
 253
 254 /* this function is called at probe time */
 255 static int sd_init_controls(struct gspca_dev *gspca_dev)
 256 {
 257         struct sd *sd = (struct sd *) gspca_dev;
 258         struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
 259
 260         gspca_dev->vdev.ctrl_handler = hdl;
 261         v4l2_ctrl_handler_init(hdl, 4);
 262
 263         sd->brightness = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 264                                 V4L2_CID_BRIGHTNESS,
 265                                 PAC207_BRIGHTNESS_MIN, PAC207_BRIGHTNESS_MAX,
 266                                 1, PAC207_BRIGHTNESS_DEFAULT);
 267         gspca_dev->autogain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 268                                 V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
 269         gspca_dev->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 270                                 V4L2_CID_EXPOSURE,
 271                                 PAC207_EXPOSURE_MIN, PAC207_EXPOSURE_MAX,
 272                                 1, PAC207_EXPOSURE_DEFAULT);
 273         gspca_dev->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 274                                 V4L2_CID_GAIN,
 275                                 PAC207_GAIN_MIN, PAC207_GAIN_MAX,
 276                                 1, PAC207_GAIN_DEFAULT);
 277         if (hdl->error) {
 278                 pr_err("Could not initialize controls\n");
 279                 return hdl->error;
 280         }
 281         v4l2_ctrl_auto_cluster(3, &gspca_dev->autogain, 0, false);
 282         return 0;
 283 }
 284
 285 /* -- start the camera -- */
 286 static int sd_start(struct gspca_dev *gspca_dev)
 287 {
 288         struct sd *sd = (struct sd *) gspca_dev;
 289         __u8 mode;
 290
 291         pac207_write_reg(gspca_dev, 0x0f, 0x10); /* Power control (Bit 6-0) */
 292         pac207_write_regs(gspca_dev, 0x0002, pac207_sensor_init[0], 8);
 293         pac207_write_regs(gspca_dev, 0x000a, pac207_sensor_init[1], 8);
 294         pac207_write_regs(gspca_dev, 0x0012, pac207_sensor_init[2], 8);
 295         pac207_write_regs(gspca_dev, 0x0042, pac207_sensor_init[3], 8);
 296
 297         /* Compression Balance */
 298         if (gspca_dev->pixfmt.width == 176)
 299                 pac207_write_reg(gspca_dev, 0x4a, 0xff);
 300         else
 301                 pac207_write_reg(gspca_dev, 0x4a, 0x30);
 302         pac207_write_reg(gspca_dev, 0x4b, 0x00); /* Sram test value */
 303         pac207_write_reg(gspca_dev, 0x08, v4l2_ctrl_g_ctrl(sd->brightness));
 304
 305         /* PGA global gain (Bit 4-0) */
 306         pac207_write_reg(gspca_dev, 0x0e,
 307                 v4l2_ctrl_g_ctrl(gspca_dev->gain));
 308         pac207_write_reg(gspca_dev, 0x02,
 309                 v4l2_ctrl_g_ctrl(gspca_dev->exposure)); /* PXCK = 12MHz /n */
 310
 311         /* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */
 312         if (led_invert)
 313                 mode = 0x00;
 314         else
 315                 mode = 0x02;
 316         if (gspca_dev->pixfmt.width == 176) {   /* 176x144 */
 317                 mode |= 0x01;
 318                 PDEBUG(D_STREAM, "pac207_start mode 176x144");
 319         } else {                                /* 352x288 */
 320                 PDEBUG(D_STREAM, "pac207_start mode 352x288");
 321         }
 322         pac207_write_reg(gspca_dev, 0x41, mode);
 323
 324         pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */
 325         pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */
 326         msleep(10);
 327         pac207_write_reg(gspca_dev, 0x40, 0x01); /* Start ISO pipe */
 328
 329         sd->sof_read = 0;
 330         sd->autogain_ignore_frames = 0;
 331         atomic_set(&sd->avg_lum, -1);
 332         return gspca_dev->usb_err;
 333 }
 334
 335 static void sd_stopN(struct gspca_dev *gspca_dev)
 336 {
 337         u8 mode;
 338
 339         /* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */
 340         if (led_invert)
 341                 mode = 0x02;
 342         else
 343                 mode = 0x00;
 344         pac207_write_reg(gspca_dev, 0x40, 0x00); /* Stop ISO pipe */
 345         pac207_write_reg(gspca_dev, 0x41, mode); /* Turn off LED */
 346         pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */
 347 }
 348
 349
 350 static void pac207_do_auto_gain(struct gspca_dev *gspca_dev)
 351 {
 352         struct sd *sd = (struct sd *) gspca_dev;
 353         int avg_lum = atomic_read(&sd->avg_lum);
 354
 355         if (avg_lum == -1)
 356                 return;
 357
 358         if (sd->autogain_ignore_frames > 0)
 359                 sd->autogain_ignore_frames--;
 360         else if (gspca_coarse_grained_expo_autogain(gspca_dev, avg_lum,
 361                         90, PAC207_AUTOGAIN_DEADZONE))
 362                 sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES;
 363 }
 364
 365 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 366                         u8 *data,
 367                         int len)
 368 {
 369         struct sd *sd = (struct sd *) gspca_dev;
 370         unsigned char *sof;
 371
 372         sof = pac_find_sof(gspca_dev, &sd->sof_read, data, len);
 373         if (sof) {
 374                 int n;
 375
 376                 /* finish decoding current frame */
 377                 n = sof - data;
 378                 if (n > sizeof pac_sof_marker)
 379                         n -= sizeof pac_sof_marker;
 380                 else
 381                         n = 0;
 382                 gspca_frame_add(gspca_dev, LAST_PACKET,
 383                                 data, n);
 384                 sd->header_read = 0;
 385                 gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
 386                 len -= sof - data;
 387                 data = sof;
 388         }
 389         if (sd->header_read < 11) {
 390                 int needed;
 391
 392                 /* get average lumination from frame header (byte 5) */
 393                 if (sd->header_read < 5) {
 394                         needed = 5 - sd->header_read;
 395                         if (len >= needed)
 396                                 atomic_set(&sd->avg_lum, data[needed - 1]);
 397                 }
 398                 /* skip the rest of the header */
 399                 needed = 11 - sd->header_read;
 400                 if (len <= needed) {
 401                         sd->header_read += len;
 402                         return;
 403                 }
 404                 data += needed;
 405                 len -= needed;
 406                 sd->header_read = 11;
 407         }
 408
 409         gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
 410 }
 411
 412 #if IS_ENABLED(CONFIG_INPUT)
 413 static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
 414                         u8 *data,               /* interrupt packet data */
 415                         int len)                /* interrupt packet length */
 416 {
 417         int ret = -EINVAL;
 418
 419         if (len == 2 && data[0] == 0x5a && data[1] == 0x5a) {
 420                 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
 421                 input_sync(gspca_dev->input_dev);
 422                 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
 423                 input_sync(gspca_dev->input_dev);
 424                 ret = 0;
 425         }
 426
 427         return ret;
 428 }
 429 #endif
 430
 431 /* sub-driver description */
 432 static const struct sd_desc sd_desc = {
 433         .name = MODULE_NAME,
 434         .config = sd_config,
 435         .init = sd_init,
 436         .init_controls = sd_init_controls,
 437         .start = sd_start,
 438         .stopN = sd_stopN,
 439         .dq_callback = pac207_do_auto_gain,
 440         .pkt_scan = sd_pkt_scan,
 441 #if IS_ENABLED(CONFIG_INPUT)
 442         .int_pkt_scan = sd_int_pkt_scan,
 443 #endif
 444 };
 445
 446 /* -- module initialisation -- */
 447 static const struct usb_device_id device_table[] = {
 448         {USB_DEVICE(0x041e, 0x4028)},
 449         {USB_DEVICE(0x093a, 0x2460)},
 450         {USB_DEVICE(0x093a, 0x2461)},
 451         {USB_DEVICE(0x093a, 0x2463)},
 452         {USB_DEVICE(0x093a, 0x2464)},
 453         {USB_DEVICE(0x093a, 0x2468)},
 454         {USB_DEVICE(0x093a, 0x2470)},
 455         {USB_DEVICE(0x093a, 0x2471)},
 456         {USB_DEVICE(0x093a, 0x2472)},
 457         {USB_DEVICE(0x093a, 0x2474)},
 458         {USB_DEVICE(0x093a, 0x2476)},
 459         {USB_DEVICE(0x145f, 0x013a)},
 460         {USB_DEVICE(0x2001, 0xf115)},
 461         {}
 462 };
 463 MODULE_DEVICE_TABLE(usb, device_table);
 464
 465 /* -- device connect -- */
 466 static int sd_probe(struct usb_interface *intf,
 467                         const struct usb_device_id *id)
 468 {
 469         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 470                                 THIS_MODULE);
 471 }
 472
 473 static struct usb_driver sd_driver = {
 474         .name = MODULE_NAME,
 475         .id_table = device_table,
 476         .probe = sd_probe,
 477         .disconnect = gspca_disconnect,
 478 #ifdef CONFIG_PM
 479         .suspend = gspca_suspend,
 480         .resume = gspca_resume,
 481         .reset_resume = gspca_resume,
 482 #endif
 483 };
 484
 485 module_usb_driver(sd_driver);