LXR linux/drivers/media/video/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 MODULE_NAME "pac207"
  27
  28#include <linux/input.h>
  29#include "gspca.h"
  30
  31MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
  32MODULE_DESCRIPTION("Pixart PAC207");
  33MODULE_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
  41#define PAC207_EXPOSURE_MIN             3
  42#define PAC207_EXPOSURE_MAX             26
  43#define PAC207_EXPOSURE_DEFAULT         5 /* power on default: 3 */
  44#define PAC207_EXPOSURE_KNEE            8 /* 4 = 30 fps, 11 = 8, 15 = 6 */
  45
  46#define PAC207_GAIN_MIN                 0
  47#define PAC207_GAIN_MAX                 31
  48#define PAC207_GAIN_DEFAULT             9 /* power on default: 9 */
  49#define PAC207_GAIN_KNEE                31
  50
  51#define PAC207_AUTOGAIN_DEADZONE        30
  52
  53/* specific webcam descriptor */
  54struct sd {
  55        struct gspca_dev gspca_dev;             /* !! must be the first item */
  56
  57        u8 mode;
  58
  59        u8 brightness;
  60        u8 exposure;
  61        u8 autogain;
  62        u8 gain;
  63
  64        u8 sof_read;
  65        u8 header_read;
  66        u8 autogain_ignore_frames;
  67
  68        atomic_t avg_lum;
  69};
  70
  71/* V4L2 controls supported by the driver */
  72static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val);
  73static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val);
  74static int sd_setexposure(struct gspca_dev *gspca_dev, __s32 val);
  75static int sd_getexposure(struct gspca_dev *gspca_dev, __s32 *val);
  76static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val);
  77static int sd_getautogain(struct gspca_dev *gspca_dev, __s32 *val);
  78static int sd_setgain(struct gspca_dev *gspca_dev, __s32 val);
  79static int sd_getgain(struct gspca_dev *gspca_dev, __s32 *val);
  80
  81static const struct ctrl sd_ctrls[] = {
  82#define SD_BRIGHTNESS 0
  83        {
  84            {
  85                .id      = V4L2_CID_BRIGHTNESS,
  86                .type    = V4L2_CTRL_TYPE_INTEGER,
  87                .name    = "Brightness",
  88                .minimum = PAC207_BRIGHTNESS_MIN,
  89                .maximum = PAC207_BRIGHTNESS_MAX,
  90                .step = 1,
  91                .default_value = PAC207_BRIGHTNESS_DEFAULT,
  92                .flags = 0,
  93            },
  94            .set = sd_setbrightness,
  95            .get = sd_getbrightness,
  96        },
  97#define SD_EXPOSURE 1
  98        {
  99            {
 100                .id = V4L2_CID_EXPOSURE,
 101                .type = V4L2_CTRL_TYPE_INTEGER,
 102                .name = "Exposure",
 103                .minimum = PAC207_EXPOSURE_MIN,
 104                .maximum = PAC207_EXPOSURE_MAX,
 105                .step = 1,
 106                .default_value = PAC207_EXPOSURE_DEFAULT,
 107                .flags = 0,
 108            },
 109            .set = sd_setexposure,
 110            .get = sd_getexposure,
 111        },
 112#define SD_AUTOGAIN 2
 113        {
 114            {
 115                .id       = V4L2_CID_AUTOGAIN,
 116                .type   = V4L2_CTRL_TYPE_BOOLEAN,
 117                .name   = "Auto Gain",
 118                .minimum = 0,
 119                .maximum = 1,
 120                .step   = 1,
 121#define AUTOGAIN_DEF 1
 122                .default_value = AUTOGAIN_DEF,
 123                .flags = 0,
 124            },
 125            .set = sd_setautogain,
 126            .get = sd_getautogain,
 127        },
 128#define SD_GAIN 3
 129        {
 130            {
 131                .id = V4L2_CID_GAIN,
 132                .type = V4L2_CTRL_TYPE_INTEGER,
 133                .name = "Gain",
 134                .minimum = PAC207_GAIN_MIN,
 135                .maximum = PAC207_GAIN_MAX,
 136                .step = 1,
 137                .default_value = PAC207_GAIN_DEFAULT,
 138                .flags = 0,
 139            },
 140            .set = sd_setgain,
 141            .get = sd_getgain,
 142        },
 143};
 144
 145static const struct v4l2_pix_format sif_mode[] = {
 146        {176, 144, V4L2_PIX_FMT_PAC207, V4L2_FIELD_NONE,
 147                .bytesperline = 176,
 148                .sizeimage = (176 + 2) * 144,
 149                        /* uncompressed, add 2 bytes / line for line header */
 150                .colorspace = V4L2_COLORSPACE_SRGB,
 151                .priv = 1},
 152        {352, 288, V4L2_PIX_FMT_PAC207, V4L2_FIELD_NONE,
 153                .bytesperline = 352,
 154                        /* compressed, but only when needed (not compressed
 155                           when the framerate is low) */
 156                .sizeimage = (352 + 2) * 288,
 157                .colorspace = V4L2_COLORSPACE_SRGB,
 158                .priv = 0},
 159};
 160
 161static const __u8 pac207_sensor_init[][8] = {
 162        {0x10, 0x12, 0x0d, 0x12, 0x0c, 0x01, 0x29, 0x84},
 163        {0x49, 0x64, 0x64, 0x64, 0x04, 0x10, 0xf0, 0x30},
 164        {0x00, 0x00, 0x00, 0x70, 0xa0, 0xf8, 0x00, 0x00},
 165        {0x32, 0x00, 0x96, 0x00, 0xa2, 0x02, 0xaf, 0x00},
 166};
 167
 168static int pac207_write_regs(struct gspca_dev *gspca_dev, u16 index,
 169        const u8 *buffer, u16 length)
 170{
 171        struct usb_device *udev = gspca_dev->dev;
 172        int err;
 173
 174        memcpy(gspca_dev->usb_buf, buffer, length);
 175
 176        err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x01,
 177                        USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
 178                        0x00, index,
 179                        gspca_dev->usb_buf, length, PAC207_CTRL_TIMEOUT);
 180        if (err < 0)
 181                err("Failed to write registers to index 0x%04X, error %d)",
 182                        index, err);
 183
 184        return err;
 185}
 186
 187
 188static int pac207_write_reg(struct gspca_dev *gspca_dev, u16 index, u16 value)
 189{
 190        struct usb_device *udev = gspca_dev->dev;
 191        int err;
 192
 193        err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00,
 194                        USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
 195                        value, index, NULL, 0, PAC207_CTRL_TIMEOUT);
 196        if (err)
 197                err("Failed to write a register (index 0x%04X,"
 198                        " value 0x%02X, error %d)", index, value, err);
 199
 200        return err;
 201}
 202
 203static int pac207_read_reg(struct gspca_dev *gspca_dev, u16 index)
 204{
 205        struct usb_device *udev = gspca_dev->dev;
 206        int res;
 207
 208        res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00,
 209                        USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
 210                        0x00, index,
 211                        gspca_dev->usb_buf, 1, PAC207_CTRL_TIMEOUT);
 212        if (res < 0) {
 213                err("Failed to read a register (index 0x%04X, error %d)",
 214                        index, res);
 215                return res;
 216        }
 217
 218        return gspca_dev->usb_buf[0];
 219}
 220
 221/* this function is called at probe time */
 222static int sd_config(struct gspca_dev *gspca_dev,
 223                        const struct usb_device_id *id)
 224{
 225        struct sd *sd = (struct sd *) gspca_dev;
 226        struct cam *cam;
 227        u8 idreg[2];
 228
 229        idreg[0] = pac207_read_reg(gspca_dev, 0x0000);
 230        idreg[1] = pac207_read_reg(gspca_dev, 0x0001);
 231        idreg[0] = ((idreg[0] & 0x0f) << 4) | ((idreg[1] & 0xf0) >> 4);
 232        idreg[1] = idreg[1] & 0x0f;
 233        PDEBUG(D_PROBE, "Pixart Sensor ID 0x%02X Chips ID 0x%02X",
 234                idreg[0], idreg[1]);
 235
 236        if (idreg[0] != 0x27) {
 237                PDEBUG(D_PROBE, "Error invalid sensor ID!");
 238                return -ENODEV;
 239        }
 240
 241        PDEBUG(D_PROBE,
 242                "Pixart PAC207BCA Image Processor and Control Chip detected"
 243                " (vid/pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
 244
 245        cam = &gspca_dev->cam;
 246        cam->cam_mode = sif_mode;
 247        cam->nmodes = ARRAY_SIZE(sif_mode);
 248        sd->brightness = PAC207_BRIGHTNESS_DEFAULT;
 249        sd->exposure = PAC207_EXPOSURE_DEFAULT;
 250        sd->gain = PAC207_GAIN_DEFAULT;
 251        sd->autogain = AUTOGAIN_DEF;
 252
 253        return 0;
 254}
 255
 256/* this function is called at probe and resume time */
 257static int sd_init(struct gspca_dev *gspca_dev)
 258{
 259        pac207_write_reg(gspca_dev, 0x41, 0x00);
 260                                /* Bit_0=Image Format,
 261                                 * Bit_1=LED,
 262                                 * Bit_2=Compression test mode enable */
 263        pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */
 264
 265        return 0;
 266}
 267
 268/* -- start the camera -- */
 269static int sd_start(struct gspca_dev *gspca_dev)
 270{
 271        struct sd *sd = (struct sd *) gspca_dev;
 272        __u8 mode;
 273
 274        pac207_write_reg(gspca_dev, 0x0f, 0x10); /* Power control (Bit 6-0) */
 275        pac207_write_regs(gspca_dev, 0x0002, pac207_sensor_init[0], 8);
 276        pac207_write_regs(gspca_dev, 0x000a, pac207_sensor_init[1], 8);
 277        pac207_write_regs(gspca_dev, 0x0012, pac207_sensor_init[2], 8);
 278        pac207_write_regs(gspca_dev, 0x0042, pac207_sensor_init[3], 8);
 279
 280        /* Compression Balance */
 281        if (gspca_dev->width == 176)
 282                pac207_write_reg(gspca_dev, 0x4a, 0xff);
 283        else
 284                pac207_write_reg(gspca_dev, 0x4a, 0x30);
 285        pac207_write_reg(gspca_dev, 0x4b, 0x00); /* Sram test value */
 286        pac207_write_reg(gspca_dev, 0x08, sd->brightness);
 287
 288        /* PGA global gain (Bit 4-0) */
 289        pac207_write_reg(gspca_dev, 0x0e, sd->gain);
 290        pac207_write_reg(gspca_dev, 0x02, sd->exposure); /* PXCK = 12MHz /n */
 291
 292        mode = 0x02; /* Image Format (Bit 0), LED (1), Compr. test mode (2) */
 293        if (gspca_dev->width == 176) {  /* 176x144 */
 294                mode |= 0x01;
 295                PDEBUG(D_STREAM, "pac207_start mode 176x144");
 296        } else {                                /* 352x288 */
 297                PDEBUG(D_STREAM, "pac207_start mode 352x288");
 298        }
 299        pac207_write_reg(gspca_dev, 0x41, mode);
 300
 301        pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */
 302        pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */
 303        msleep(10);
 304        pac207_write_reg(gspca_dev, 0x40, 0x01); /* Start ISO pipe */
 305
 306        sd->sof_read = 0;
 307        sd->autogain_ignore_frames = 0;
 308        atomic_set(&sd->avg_lum, -1);
 309        return 0;
 310}
 311
 312static void sd_stopN(struct gspca_dev *gspca_dev)
 313{
 314        pac207_write_reg(gspca_dev, 0x40, 0x00); /* Stop ISO pipe */
 315        pac207_write_reg(gspca_dev, 0x41, 0x00); /* Turn of LED */
 316        pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */
 317}
 318
 319/* Include pac common sof detection functions */
 320#include "pac_common.h"
 321
 322static void pac207_do_auto_gain(struct gspca_dev *gspca_dev)
 323{
 324        struct sd *sd = (struct sd *) gspca_dev;
 325        int avg_lum = atomic_read(&sd->avg_lum);
 326
 327        if (avg_lum == -1)
 328                return;
 329
 330        if (sd->autogain_ignore_frames > 0)
 331                sd->autogain_ignore_frames--;
 332        else if (gspca_auto_gain_n_exposure(gspca_dev, avg_lum,
 333                        100, PAC207_AUTOGAIN_DEADZONE,
 334                        PAC207_GAIN_KNEE, PAC207_EXPOSURE_KNEE))
 335                sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES;
 336}
 337
 338static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 339                        u8 *data,
 340                        int len)
 341{
 342        struct sd *sd = (struct sd *) gspca_dev;
 343        unsigned char *sof;
 344
 345        sof = pac_find_sof(&sd->sof_read, data, len);
 346        if (sof) {
 347                int n;
 348
 349                /* finish decoding current frame */
 350                n = sof - data;
 351                if (n > sizeof pac_sof_marker)
 352                        n -= sizeof pac_sof_marker;
 353                else
 354                        n = 0;
 355                gspca_frame_add(gspca_dev, LAST_PACKET,
 356                                data, n);
 357                sd->header_read = 0;
 358                gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
 359                len -= sof - data;
 360                data = sof;
 361        }
 362        if (sd->header_read < 11) {
 363                int needed;
 364
 365                /* get average lumination from frame header (byte 5) */
 366                if (sd->header_read < 5) {
 367                        needed = 5 - sd->header_read;
 368                        if (len >= needed)
 369                                atomic_set(&sd->avg_lum, data[needed - 1]);
 370                }
 371                /* skip the rest of the header */
 372                needed = 11 - sd->header_read;
 373                if (len <= needed) {
 374                        sd->header_read += len;
 375                        return;
 376                }
 377                data += needed;
 378                len -= needed;
 379                sd->header_read = 11;
 380        }
 381
 382        gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
 383}
 384
 385static void setbrightness(struct gspca_dev *gspca_dev)
 386{
 387        struct sd *sd = (struct sd *) gspca_dev;
 388
 389        pac207_write_reg(gspca_dev, 0x08, sd->brightness);
 390        pac207_write_reg(gspca_dev, 0x13, 0x01);        /* Bit 0, auto clear */
 391        pac207_write_reg(gspca_dev, 0x1c, 0x01);        /* not documented */
 392}
 393
 394static void setexposure(struct gspca_dev *gspca_dev)
 395{
 396        struct sd *sd = (struct sd *) gspca_dev;
 397
 398        pac207_write_reg(gspca_dev, 0x02, sd->exposure);
 399        pac207_write_reg(gspca_dev, 0x13, 0x01);        /* Bit 0, auto clear */
 400        pac207_write_reg(gspca_dev, 0x1c, 0x01);        /* not documented */
 401}
 402
 403static void setgain(struct gspca_dev *gspca_dev)
 404{
 405        struct sd *sd = (struct sd *) gspca_dev;
 406
 407        pac207_write_reg(gspca_dev, 0x0e, sd->gain);
 408        pac207_write_reg(gspca_dev, 0x13, 0x01);        /* Bit 0, auto clear */
 409        pac207_write_reg(gspca_dev, 0x1c, 0x01);        /* not documented */
 410}
 411
 412static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val)
 413{
 414        struct sd *sd = (struct sd *) gspca_dev;
 415
 416        sd->brightness = val;
 417        if (gspca_dev->streaming)
 418                setbrightness(gspca_dev);
 419        return 0;
 420}
 421
 422static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val)
 423{
 424        struct sd *sd = (struct sd *) gspca_dev;
 425
 426        *val = sd->brightness;
 427        return 0;
 428}
 429
 430static int sd_setexposure(struct gspca_dev *gspca_dev, __s32 val)
 431{
 432        struct sd *sd = (struct sd *) gspca_dev;
 433
 434        sd->exposure = val;
 435        if (gspca_dev->streaming)
 436                setexposure(gspca_dev);
 437        return 0;
 438}
 439
 440static int sd_getexposure(struct gspca_dev *gspca_dev, __s32 *val)
 441{
 442        struct sd *sd = (struct sd *) gspca_dev;
 443
 444        *val = sd->exposure;
 445        return 0;
 446}
 447
 448static int sd_setgain(struct gspca_dev *gspca_dev, __s32 val)
 449{
 450        struct sd *sd = (struct sd *) gspca_dev;
 451
 452        sd->gain = val;
 453        if (gspca_dev->streaming)
 454                setgain(gspca_dev);
 455        return 0;
 456}
 457
 458static int sd_getgain(struct gspca_dev *gspca_dev, __s32 *val)
 459{
 460        struct sd *sd = (struct sd *) gspca_dev;
 461
 462        *val = sd->gain;
 463        return 0;
 464}
 465
 466static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val)
 467{
 468        struct sd *sd = (struct sd *) gspca_dev;
 469
 470        sd->autogain = val;
 471        /* when switching to autogain set defaults to make sure
 472           we are on a valid point of the autogain gain /
 473           exposure knee graph, and give this change time to
 474           take effect before doing autogain. */
 475        if (sd->autogain) {
 476                sd->exposure = PAC207_EXPOSURE_DEFAULT;
 477                sd->gain = PAC207_GAIN_DEFAULT;
 478                if (gspca_dev->streaming) {
 479                        sd->autogain_ignore_frames =
 480                                PAC_AUTOGAIN_IGNORE_FRAMES;
 481                        setexposure(gspca_dev);
 482                        setgain(gspca_dev);
 483                }
 484        }
 485
 486        return 0;
 487}
 488
 489static int sd_getautogain(struct gspca_dev *gspca_dev, __s32 *val)
 490{
 491        struct sd *sd = (struct sd *) gspca_dev;
 492
 493        *val = sd->autogain;
 494        return 0;
 495}
 496
 497#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
 498static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
 499                        u8 *data,               /* interrupt packet data */
 500                        int len)                /* interrput packet length */
 501{
 502        int ret = -EINVAL;
 503
 504        if (len == 2 && data[0] == 0x5a && data[1] == 0x5a) {
 505                input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
 506                input_sync(gspca_dev->input_dev);
 507                input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
 508                input_sync(gspca_dev->input_dev);
 509                ret = 0;
 510        }
 511
 512        return ret;
 513}
 514#endif
 515
 516/* sub-driver description */
 517static const struct sd_desc sd_desc = {
 518        .name = MODULE_NAME,
 519        .ctrls = sd_ctrls,
 520        .nctrls = ARRAY_SIZE(sd_ctrls),
 521        .config = sd_config,
 522        .init = sd_init,
 523        .start = sd_start,
 524        .stopN = sd_stopN,
 525        .dq_callback = pac207_do_auto_gain,
 526        .pkt_scan = sd_pkt_scan,
 527#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
 528        .int_pkt_scan = sd_int_pkt_scan,
 529#endif
 530};
 531
 532/* -- module initialisation -- */
 533static const struct usb_device_id device_table[] = {
 534        {USB_DEVICE(0x041e, 0x4028)},
 535        {USB_DEVICE(0x093a, 0x2460)},
 536        {USB_DEVICE(0x093a, 0x2461)},
 537        {USB_DEVICE(0x093a, 0x2463)},
 538        {USB_DEVICE(0x093a, 0x2464)},
 539        {USB_DEVICE(0x093a, 0x2468)},
 540        {USB_DEVICE(0x093a, 0x2470)},
 541        {USB_DEVICE(0x093a, 0x2471)},
 542        {USB_DEVICE(0x093a, 0x2472)},
 543        {USB_DEVICE(0x093a, 0x2474)},
 544        {USB_DEVICE(0x093a, 0x2476)},
 545        {USB_DEVICE(0x145f, 0x013a)},
 546        {USB_DEVICE(0x2001, 0xf115)},
 547        {}
 548};
 549MODULE_DEVICE_TABLE(usb, device_table);
 550
 551/* -- device connect -- */
 552static int sd_probe(struct usb_interface *intf,
 553                        const struct usb_device_id *id)
 554{
 555        return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 556                                THIS_MODULE);
 557}
 558
 559static struct usb_driver sd_driver = {
 560        .name = MODULE_NAME,
 561        .id_table = device_table,
 562        .probe = sd_probe,
 563        .disconnect = gspca_disconnect,
 564#ifdef CONFIG_PM
 565        .suspend = gspca_suspend,
 566        .resume = gspca_resume,
 567#endif
 568};
 569
 570/* -- module insert / remove -- */
 571static int __init sd_mod_init(void)
 572{
 573        return usb_register(&sd_driver);
 574}
 575static void __exit sd_mod_exit(void)
 576{
 577        usb_deregister(&sd_driver);
 578}
 579
 580module_init(sd_mod_init);
 581module_exit(sd_mod_exit);
 582