drivers/media/usb/gspca/stv06xx/stv06xx_pb0100.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
   4  *                    Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
   5  * Copyright (c) 2002, 2003 Tuukka Toivonen
   6  * Copyright (c) 2008 Erik Andrén
   7  *
   8  * P/N 861037:      Sensor HDCS1000        ASIC STV0600
   9  * P/N 861050-0010: Sensor HDCS1000        ASIC STV0600
  10  * P/N 861050-0020: Sensor Photobit PB100  ASIC STV0600-1 - QuickCam Express
  11  * P/N 861055:      Sensor ST VV6410       ASIC STV0610   - LEGO cam
  12  * P/N 861075-0040: Sensor HDCS1000        ASIC
  13  * P/N 961179-0700: Sensor ST VV6410       ASIC STV0602   - Dexxa WebCam USB
  14  * P/N 861040-0000: Sensor ST VV6410       ASIC STV0610   - QuickCam Web
  15  */
  16
  17 /*
  18  * The spec file for the PB-0100 suggests the following for best quality
  19  * images after the sensor has been reset :
  20  *
  21  * PB_ADCGAINL      = R60 = 0x03 (3 dec)      : sets low reference of ADC
  22                                                 to produce good black level
  23  * PB_PREADCTRL     = R32 = 0x1400 (5120 dec) : Enables global gain changes
  24                                                 through R53
  25  * PB_ADCMINGAIN    = R52 = 0x10 (16 dec)     : Sets the minimum gain for
  26                                                 auto-exposure
  27  * PB_ADCGLOBALGAIN = R53 = 0x10 (16 dec)     : Sets the global gain
  28  * PB_EXPGAIN       = R14 = 0x11 (17 dec)     : Sets the auto-exposure value
  29  * PB_UPDATEINT     = R23 = 0x02 (2 dec)      : Sets the speed on
  30                                                 auto-exposure routine
  31  * PB_CFILLIN       = R5  = 0x0E (14 dec)     : Sets the frame rate
  32  */
  33
  34 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  35
  36 #include "stv06xx_pb0100.h"
  37
  38 struct pb0100_ctrls {
  39         struct { /* one big happy control cluster... */
  40                 struct v4l2_ctrl *autogain;
  41                 struct v4l2_ctrl *gain;
  42                 struct v4l2_ctrl *exposure;
  43                 struct v4l2_ctrl *red;
  44                 struct v4l2_ctrl *blue;
  45                 struct v4l2_ctrl *natural;
  46         };
  47         struct v4l2_ctrl *target;
  48 };
  49
  50 static struct v4l2_pix_format pb0100_mode[] = {
  51 /* low res / subsample modes disabled as they are only half res horizontal,
  52    halving the vertical resolution does not seem to work */
  53         {
  54                 320,
  55                 240,
  56                 V4L2_PIX_FMT_SGRBG8,
  57                 V4L2_FIELD_NONE,
  58                 .sizeimage = 320 * 240,
  59                 .bytesperline = 320,
  60                 .colorspace = V4L2_COLORSPACE_SRGB,
  61                 .priv = PB0100_CROP_TO_VGA
  62         },
  63         {
  64                 352,
  65                 288,
  66                 V4L2_PIX_FMT_SGRBG8,
  67                 V4L2_FIELD_NONE,
  68                 .sizeimage = 352 * 288,
  69                 .bytesperline = 352,
  70                 .colorspace = V4L2_COLORSPACE_SRGB,
  71                 .priv = 0
  72         }
  73 };
  74
  75 static int pb0100_s_ctrl(struct v4l2_ctrl *ctrl)
  76 {
  77         struct gspca_dev *gspca_dev =
  78                 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
  79         struct sd *sd = (struct sd *)gspca_dev;
  80         struct pb0100_ctrls *ctrls = sd->sensor_priv;
  81         int err = -EINVAL;
  82
  83         switch (ctrl->id) {
  84         case V4L2_CID_AUTOGAIN:
  85                 err = pb0100_set_autogain(gspca_dev, ctrl->val);
  86                 if (err)
  87                         break;
  88                 if (ctrl->val)
  89                         break;
  90                 err = pb0100_set_gain(gspca_dev, ctrls->gain->val);
  91                 if (err)
  92                         break;
  93                 err = pb0100_set_exposure(gspca_dev, ctrls->exposure->val);
  94                 break;
  95         case V4L2_CTRL_CLASS_USER + 0x1001:
  96                 err = pb0100_set_autogain_target(gspca_dev, ctrl->val);
  97                 break;
  98         }
  99         return err;
 100 }
 101
 102 static const struct v4l2_ctrl_ops pb0100_ctrl_ops = {
 103         .s_ctrl = pb0100_s_ctrl,
 104 };
 105
 106 static int pb0100_init_controls(struct sd *sd)
 107 {
 108         struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
 109         struct pb0100_ctrls *ctrls;
 110         static const struct v4l2_ctrl_config autogain_target = {
 111                 .ops = &pb0100_ctrl_ops,
 112                 .id = V4L2_CTRL_CLASS_USER + 0x1000,
 113                 .type = V4L2_CTRL_TYPE_INTEGER,
 114                 .name = "Automatic Gain Target",
 115                 .max = 255,
 116                 .step = 1,
 117                 .def = 128,
 118         };
 119         static const struct v4l2_ctrl_config natural_light = {
 120                 .ops = &pb0100_ctrl_ops,
 121                 .id = V4L2_CTRL_CLASS_USER + 0x1001,
 122                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 123                 .name = "Natural Light Source",
 124                 .max = 1,
 125                 .step = 1,
 126                 .def = 1,
 127         };
 128
 129         ctrls = kzalloc(sizeof(*ctrls), GFP_KERNEL);
 130         if (!ctrls)
 131                 return -ENOMEM;
 132
 133         v4l2_ctrl_handler_init(hdl, 6);
 134         ctrls->autogain = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
 135                         V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
 136         ctrls->exposure = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
 137                         V4L2_CID_EXPOSURE, 0, 511, 1, 12);
 138         ctrls->gain = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
 139                         V4L2_CID_GAIN, 0, 255, 1, 128);
 140         ctrls->red = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
 141                         V4L2_CID_RED_BALANCE, -255, 255, 1, 0);
 142         ctrls->blue = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
 143                         V4L2_CID_BLUE_BALANCE, -255, 255, 1, 0);
 144         ctrls->natural = v4l2_ctrl_new_custom(hdl, &natural_light, NULL);
 145         ctrls->target = v4l2_ctrl_new_custom(hdl, &autogain_target, NULL);
 146         if (hdl->error) {
 147                 kfree(ctrls);
 148                 return hdl->error;
 149         }
 150         sd->sensor_priv = ctrls;
 151         v4l2_ctrl_auto_cluster(5, &ctrls->autogain, 0, false);
 152         return 0;
 153 }
 154
 155 static int pb0100_probe(struct sd *sd)
 156 {
 157         u16 sensor;
 158         int err;
 159
 160         err = stv06xx_read_sensor(sd, PB_IDENT, &sensor);
 161
 162         if (err < 0)
 163                 return -ENODEV;
 164         if ((sensor >> 8) != 0x64)
 165                 return -ENODEV;
 166
 167         pr_info("Photobit pb0100 sensor detected\n");
 168
 169         sd->gspca_dev.cam.cam_mode = pb0100_mode;
 170         sd->gspca_dev.cam.nmodes = ARRAY_SIZE(pb0100_mode);
 171
 172         return 0;
 173 }
 174
 175 static int pb0100_start(struct sd *sd)
 176 {
 177         int err, packet_size, max_packet_size;
 178         struct usb_host_interface *alt;
 179         struct usb_interface *intf;
 180         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 181         struct cam *cam = &sd->gspca_dev.cam;
 182         u32 mode = cam->cam_mode[sd->gspca_dev.curr_mode].priv;
 183
 184         intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
 185         alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
 186         if (!alt)
 187                 return -ENODEV;
 188         packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
 189
 190         /* If we don't have enough bandwidth use a lower framerate */
 191         max_packet_size = sd->sensor->max_packet_size[sd->gspca_dev.curr_mode];
 192         if (packet_size < max_packet_size)
 193                 stv06xx_write_sensor(sd, PB_ROWSPEED, BIT(4)|BIT(3)|BIT(1));
 194         else
 195                 stv06xx_write_sensor(sd, PB_ROWSPEED, BIT(5)|BIT(3)|BIT(1));
 196
 197         /* Setup sensor window */
 198         if (mode & PB0100_CROP_TO_VGA) {
 199                 stv06xx_write_sensor(sd, PB_RSTART, 30);
 200                 stv06xx_write_sensor(sd, PB_CSTART, 20);
 201                 stv06xx_write_sensor(sd, PB_RWSIZE, 240 - 1);
 202                 stv06xx_write_sensor(sd, PB_CWSIZE, 320 - 1);
 203         } else {
 204                 stv06xx_write_sensor(sd, PB_RSTART, 8);
 205                 stv06xx_write_sensor(sd, PB_CSTART, 4);
 206                 stv06xx_write_sensor(sd, PB_RWSIZE, 288 - 1);
 207                 stv06xx_write_sensor(sd, PB_CWSIZE, 352 - 1);
 208         }
 209
 210         if (mode & PB0100_SUBSAMPLE) {
 211                 stv06xx_write_bridge(sd, STV_Y_CTRL, 0x02); /* Wrong, FIXME */
 212                 stv06xx_write_bridge(sd, STV_X_CTRL, 0x06);
 213
 214                 stv06xx_write_bridge(sd, STV_SCAN_RATE, 0x10);
 215         } else {
 216                 stv06xx_write_bridge(sd, STV_Y_CTRL, 0x01);
 217                 stv06xx_write_bridge(sd, STV_X_CTRL, 0x0a);
 218                 /* larger -> slower */
 219                 stv06xx_write_bridge(sd, STV_SCAN_RATE, 0x20);
 220         }
 221
 222         err = stv06xx_write_sensor(sd, PB_CONTROL, BIT(5)|BIT(3)|BIT(1));
 223         gspca_dbg(gspca_dev, D_STREAM, "Started stream, status: %d\n", err);
 224
 225         return (err < 0) ? err : 0;
 226 }
 227
 228 static int pb0100_stop(struct sd *sd)
 229 {
 230         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 231         int err;
 232
 233         err = stv06xx_write_sensor(sd, PB_ABORTFRAME, 1);
 234
 235         if (err < 0)
 236                 goto out;
 237
 238         /* Set bit 1 to zero */
 239         err = stv06xx_write_sensor(sd, PB_CONTROL, BIT(5)|BIT(3));
 240
 241         gspca_dbg(gspca_dev, D_STREAM, "Halting stream\n");
 242 out:
 243         return (err < 0) ? err : 0;
 244 }
 245
 246 /* FIXME: Sort the init commands out and put them into tables,
 247           this is only for getting the camera to work */
 248 /* FIXME: No error handling for now,
 249           add this once the init has been converted to proper tables */
 250 static int pb0100_init(struct sd *sd)
 251 {
 252         stv06xx_write_bridge(sd, STV_REG00, 1);
 253         stv06xx_write_bridge(sd, STV_SCAN_RATE, 0);
 254
 255         /* Reset sensor */
 256         stv06xx_write_sensor(sd, PB_RESET, 1);
 257         stv06xx_write_sensor(sd, PB_RESET, 0);
 258
 259         /* Disable chip */
 260         stv06xx_write_sensor(sd, PB_CONTROL, BIT(5)|BIT(3));
 261
 262         /* Gain stuff...*/
 263         stv06xx_write_sensor(sd, PB_PREADCTRL, BIT(12)|BIT(10)|BIT(6));
 264         stv06xx_write_sensor(sd, PB_ADCGLOBALGAIN, 12);
 265
 266         /* Set up auto-exposure */
 267         /* ADC VREF_HI new setting for a transition
 268           from the Expose1 to the Expose2 setting */
 269         stv06xx_write_sensor(sd, PB_R28, 12);
 270         /* gain max for autoexposure */
 271         stv06xx_write_sensor(sd, PB_ADCMAXGAIN, 180);
 272         /* gain min for autoexposure  */
 273         stv06xx_write_sensor(sd, PB_ADCMINGAIN, 12);
 274         /* Maximum frame integration time (programmed into R8)
 275            allowed for auto-exposure routine */
 276         stv06xx_write_sensor(sd, PB_R54, 3);
 277         /* Minimum frame integration time (programmed into R8)
 278            allowed for auto-exposure routine */
 279         stv06xx_write_sensor(sd, PB_R55, 0);
 280         stv06xx_write_sensor(sd, PB_UPDATEINT, 1);
 281         /* R15  Expose0 (maximum that auto-exposure may use) */
 282         stv06xx_write_sensor(sd, PB_R15, 800);
 283         /* R17  Expose2 (minimum that auto-exposure may use) */
 284         stv06xx_write_sensor(sd, PB_R17, 10);
 285
 286         stv06xx_write_sensor(sd, PB_EXPGAIN, 0);
 287
 288         /* 0x14 */
 289         stv06xx_write_sensor(sd, PB_VOFFSET, 0);
 290         /* 0x0D */
 291         stv06xx_write_sensor(sd, PB_ADCGAINH, 11);
 292         /* Set black level (important!) */
 293         stv06xx_write_sensor(sd, PB_ADCGAINL, 0);
 294
 295         /* ??? */
 296         stv06xx_write_bridge(sd, STV_REG00, 0x11);
 297         stv06xx_write_bridge(sd, STV_REG03, 0x45);
 298         stv06xx_write_bridge(sd, STV_REG04, 0x07);
 299
 300         /* Scan/timing for the sensor */
 301         stv06xx_write_sensor(sd, PB_ROWSPEED, BIT(4)|BIT(3)|BIT(1));
 302         stv06xx_write_sensor(sd, PB_CFILLIN, 14);
 303         stv06xx_write_sensor(sd, PB_VBL, 0);
 304         stv06xx_write_sensor(sd, PB_FINTTIME, 0);
 305         stv06xx_write_sensor(sd, PB_RINTTIME, 123);
 306
 307         stv06xx_write_bridge(sd, STV_REG01, 0xc2);
 308         stv06xx_write_bridge(sd, STV_REG02, 0xb0);
 309         return 0;
 310 }
 311
 312 static int pb0100_dump(struct sd *sd)
 313 {
 314         return 0;
 315 }
 316
 317 static int pb0100_set_gain(struct gspca_dev *gspca_dev, __s32 val)
 318 {
 319         int err;
 320         struct sd *sd = (struct sd *) gspca_dev;
 321         struct pb0100_ctrls *ctrls = sd->sensor_priv;
 322
 323         err = stv06xx_write_sensor(sd, PB_G1GAIN, val);
 324         if (!err)
 325                 err = stv06xx_write_sensor(sd, PB_G2GAIN, val);
 326         gspca_dbg(gspca_dev, D_CONF, "Set green gain to %d, status: %d\n",
 327                   val, err);
 328
 329         if (!err)
 330                 err = pb0100_set_red_balance(gspca_dev, ctrls->red->val);
 331         if (!err)
 332                 err = pb0100_set_blue_balance(gspca_dev, ctrls->blue->val);
 333
 334         return err;
 335 }
 336
 337 static int pb0100_set_red_balance(struct gspca_dev *gspca_dev, __s32 val)
 338 {
 339         int err;
 340         struct sd *sd = (struct sd *) gspca_dev;
 341         struct pb0100_ctrls *ctrls = sd->sensor_priv;
 342
 343         val += ctrls->gain->val;
 344         if (val < 0)
 345                 val = 0;
 346         else if (val > 255)
 347                 val = 255;
 348
 349         err = stv06xx_write_sensor(sd, PB_RGAIN, val);
 350         gspca_dbg(gspca_dev, D_CONF, "Set red gain to %d, status: %d\n",
 351                   val, err);
 352
 353         return err;
 354 }
 355
 356 static int pb0100_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val)
 357 {
 358         int err;
 359         struct sd *sd = (struct sd *) gspca_dev;
 360         struct pb0100_ctrls *ctrls = sd->sensor_priv;
 361
 362         val += ctrls->gain->val;
 363         if (val < 0)
 364                 val = 0;
 365         else if (val > 255)
 366                 val = 255;
 367
 368         err = stv06xx_write_sensor(sd, PB_BGAIN, val);
 369         gspca_dbg(gspca_dev, D_CONF, "Set blue gain to %d, status: %d\n",
 370                   val, err);
 371
 372         return err;
 373 }
 374
 375 static int pb0100_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
 376 {
 377         struct sd *sd = (struct sd *) gspca_dev;
 378         int err;
 379
 380         err = stv06xx_write_sensor(sd, PB_RINTTIME, val);
 381         gspca_dbg(gspca_dev, D_CONF, "Set exposure to %d, status: %d\n",
 382                   val, err);
 383
 384         return err;
 385 }
 386
 387 static int pb0100_set_autogain(struct gspca_dev *gspca_dev, __s32 val)
 388 {
 389         int err;
 390         struct sd *sd = (struct sd *) gspca_dev;
 391         struct pb0100_ctrls *ctrls = sd->sensor_priv;
 392
 393         if (val) {
 394                 if (ctrls->natural->val)
 395                         val = BIT(6)|BIT(4)|BIT(0);
 396                 else
 397                         val = BIT(4)|BIT(0);
 398         } else
 399                 val = 0;
 400
 401         err = stv06xx_write_sensor(sd, PB_EXPGAIN, val);
 402         gspca_dbg(gspca_dev, D_CONF, "Set autogain to %d (natural: %d), status: %d\n",
 403                   val, ctrls->natural->val, err);
 404
 405         return err;
 406 }
 407
 408 static int pb0100_set_autogain_target(struct gspca_dev *gspca_dev, __s32 val)
 409 {
 410         int err, totalpixels, brightpixels, darkpixels;
 411         struct sd *sd = (struct sd *) gspca_dev;
 412
 413         /* Number of pixels counted by the sensor when subsampling the pixels.
 414          * Slightly larger than the real value to avoid oscillation */
 415         totalpixels = gspca_dev->pixfmt.width * gspca_dev->pixfmt.height;
 416         totalpixels = totalpixels/(8*8) + totalpixels/(64*64);
 417
 418         brightpixels = (totalpixels * val) >> 8;
 419         darkpixels   = totalpixels - brightpixels;
 420         err = stv06xx_write_sensor(sd, PB_R21, brightpixels);
 421         if (!err)
 422                 err = stv06xx_write_sensor(sd, PB_R22, darkpixels);
 423
 424         gspca_dbg(gspca_dev, D_CONF, "Set autogain target to %d, status: %d\n",
 425                   val, err);
 426
 427         return err;
 428 }