drivers/media/usb/pwc/pwc-ctrl.c

   1 /* Driver for Philips webcam
   2    Functions that send various control messages to the webcam, including
   3    video modes.
   4    (C) 1999-2003 Nemosoft Unv.
   5    (C) 2004-2006 Luc Saillard (luc@saillard.org)
   6    (C) 2011 Hans de Goede <hdegoede@redhat.com>
   7
   8    NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
   9    driver and thus may have bugs that are not present in the original version.
  10    Please send bug reports and support requests to <luc@saillard.org>.
  11
  12    NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
  13    driver and thus may have bugs that are not present in the original version.
  14    Please send bug reports and support requests to <luc@saillard.org>.
  15    The decompression routines have been implemented by reverse-engineering the
  16    Nemosoft binary pwcx module. Caveat emptor.
  17
  18    This program is free software; you can redistribute it and/or modify
  19    it under the terms of the GNU General Public License as published by
  20    the Free Software Foundation; either version 2 of the License, or
  21    (at your option) any later version.
  22
  23    This program is distributed in the hope that it will be useful,
  24    but WITHOUT ANY WARRANTY; without even the implied warranty of
  25    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26    GNU General Public License for more details.
  27
  28    You should have received a copy of the GNU General Public License
  29    along with this program; if not, write to the Free Software
  30    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  31 */
  32
  33 /*
  34    Changes
  35    2001/08/03  Alvarado   Added methods for changing white balance and
  36                           red/green gains
  37  */
  38
  39 /* Control functions for the cam; brightness, contrast, video mode, etc. */
  40
  41 #ifdef __KERNEL__
  42 #include <linux/uaccess.h>
  43 #endif
  44 #include <asm/errno.h>
  45
  46 #include "pwc.h"
  47 #include "pwc-kiara.h"
  48 #include "pwc-timon.h"
  49 #include "pwc-dec1.h"
  50 #include "pwc-dec23.h"
  51
  52 /* Selectors for status controls used only in this file */
  53 #define GET_STATUS_B00                          0x0B00
  54 #define SENSOR_TYPE_FORMATTER1                  0x0C00
  55 #define GET_STATUS_3000                         0x3000
  56 #define READ_RAW_Y_MEAN_FORMATTER               0x3100
  57 #define SET_POWER_SAVE_MODE_FORMATTER           0x3200
  58 #define MIRROR_IMAGE_FORMATTER                  0x3300
  59 #define LED_FORMATTER                           0x3400
  60 #define LOWLIGHT                                0x3500
  61 #define GET_STATUS_3600                         0x3600
  62 #define SENSOR_TYPE_FORMATTER2                  0x3700
  63 #define GET_STATUS_3800                         0x3800
  64 #define GET_STATUS_4000                         0x4000
  65 #define GET_STATUS_4100                         0x4100  /* Get */
  66 #define CTL_STATUS_4200                         0x4200  /* [GS] 1 */
  67
  68 /* Formatters for the Video Endpoint controls [GS]ET_EP_STREAM_CTL */
  69 #define VIDEO_OUTPUT_CONTROL_FORMATTER          0x0100
  70
  71 static const char *size2name[PSZ_MAX] =
  72 {
  73         "subQCIF",
  74         "QSIF",
  75         "QCIF",
  76         "SIF",
  77         "CIF",
  78         "VGA",
  79 };
  80
  81 /********/
  82
  83 /* Entries for the Nala (645/646) camera; the Nala doesn't have compression
  84    preferences, so you either get compressed or non-compressed streams.
  85
  86    An alternate value of 0 means this mode is not available at all.
  87  */
  88
  89 #define PWC_FPS_MAX_NALA 8
  90
  91 struct Nala_table_entry {
  92         char alternate;                 /* USB alternate setting */
  93         int compressed;                 /* Compressed yes/no */
  94
  95         unsigned char mode[3];          /* precomputed mode table */
  96 };
  97
  98 static unsigned int Nala_fps_vector[PWC_FPS_MAX_NALA] = { 4, 5, 7, 10, 12, 15, 20, 24 };
  99
 100 static struct Nala_table_entry Nala_table[PSZ_MAX][PWC_FPS_MAX_NALA] =
 101 {
 102 #include "pwc-nala.h"
 103 };
 104
 105 /****************************************************************************/
 106
 107 static int recv_control_msg(struct pwc_device *pdev,
 108         u8 request, u16 value, int recv_count)
 109 {
 110         int rc;
 111
 112         rc = usb_control_msg(pdev->udev, usb_rcvctrlpipe(pdev->udev, 0),
 113                 request,
 114                 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 115                 value, pdev->vcinterface,
 116                 pdev->ctrl_buf, recv_count, USB_CTRL_GET_TIMEOUT);
 117         if (rc < 0)
 118                 PWC_ERROR("recv_control_msg error %d req %02x val %04x\n",
 119                           rc, request, value);
 120         return rc;
 121 }
 122
 123 static inline int send_video_command(struct pwc_device *pdev,
 124         int index, const unsigned char *buf, int buflen)
 125 {
 126         int rc;
 127
 128         memcpy(pdev->ctrl_buf, buf, buflen);
 129
 130         rc = usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
 131                         SET_EP_STREAM_CTL,
 132                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 133                         VIDEO_OUTPUT_CONTROL_FORMATTER, index,
 134                         pdev->ctrl_buf, buflen, USB_CTRL_SET_TIMEOUT);
 135         if (rc >= 0)
 136                 memcpy(pdev->cmd_buf, buf, buflen);
 137         else
 138                 PWC_ERROR("send_video_command error %d\n", rc);
 139
 140         return rc;
 141 }
 142
 143 int send_control_msg(struct pwc_device *pdev,
 144         u8 request, u16 value, void *buf, int buflen)
 145 {
 146         return usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
 147                         request,
 148                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 149                         value, pdev->vcinterface,
 150                         buf, buflen, USB_CTRL_SET_TIMEOUT);
 151 }
 152
 153 static int set_video_mode_Nala(struct pwc_device *pdev, int size, int pixfmt,
 154                                int frames, int *compression, int send_to_cam)
 155 {
 156         int fps, ret = 0;
 157         struct Nala_table_entry *pEntry;
 158         int frames2frames[31] =
 159         { /* closest match of framerate */
 160            0,  0,  0,  0,  4,  /*  0-4  */
 161            5,  5,  7,  7, 10,  /*  5-9  */
 162           10, 10, 12, 12, 15,  /* 10-14 */
 163           15, 15, 15, 20, 20,  /* 15-19 */
 164           20, 20, 20, 24, 24,  /* 20-24 */
 165           24, 24, 24, 24, 24,  /* 25-29 */
 166           24                   /* 30    */
 167         };
 168         int frames2table[31] =
 169         { 0, 0, 0, 0, 0, /*  0-4  */
 170           1, 1, 1, 2, 2, /*  5-9  */
 171           3, 3, 4, 4, 4, /* 10-14 */
 172           5, 5, 5, 5, 5, /* 15-19 */
 173           6, 6, 6, 6, 7, /* 20-24 */
 174           7, 7, 7, 7, 7, /* 25-29 */
 175           7              /* 30    */
 176         };
 177
 178         if (size < 0 || size > PSZ_CIF)
 179                 return -EINVAL;
 180         if (frames < 4)
 181                 frames = 4;
 182         else if (size > PSZ_QCIF && frames > 15)
 183                 frames = 15;
 184         else if (frames > 25)
 185                 frames = 25;
 186         frames = frames2frames[frames];
 187         fps = frames2table[frames];
 188         pEntry = &Nala_table[size][fps];
 189         if (pEntry->alternate == 0)
 190                 return -EINVAL;
 191
 192         if (send_to_cam)
 193                 ret = send_video_command(pdev, pdev->vendpoint,
 194                                          pEntry->mode, 3);
 195         if (ret < 0)
 196                 return ret;
 197
 198         if (pEntry->compressed && pixfmt == V4L2_PIX_FMT_YUV420)
 199                 pwc_dec1_init(pdev, pEntry->mode);
 200
 201         /* Set various parameters */
 202         pdev->pixfmt = pixfmt;
 203         pdev->vframes = frames;
 204         pdev->valternate = pEntry->alternate;
 205         pdev->width  = pwc_image_sizes[size][0];
 206         pdev->height = pwc_image_sizes[size][1];
 207         pdev->frame_size = (pdev->width * pdev->height * 3) / 2;
 208         if (pEntry->compressed) {
 209                 if (pdev->release < 5) { /* 4 fold compression */
 210                         pdev->vbandlength = 528;
 211                         pdev->frame_size /= 4;
 212                 }
 213                 else {
 214                         pdev->vbandlength = 704;
 215                         pdev->frame_size /= 3;
 216                 }
 217         }
 218         else
 219                 pdev->vbandlength = 0;
 220
 221         /* Let pwc-if.c:isoc_init know we don't support higher compression */
 222         *compression = 3;
 223
 224         return 0;
 225 }
 226
 227
 228 static int set_video_mode_Timon(struct pwc_device *pdev, int size, int pixfmt,
 229                                 int frames, int *compression, int send_to_cam)
 230 {
 231         const struct Timon_table_entry *pChoose;
 232         int fps, ret = 0;
 233
 234         if (size >= PSZ_MAX || *compression < 0 || *compression > 3)
 235                 return -EINVAL;
 236         if (frames < 5)
 237                 frames = 5;
 238         else if (size == PSZ_VGA && frames > 15)
 239                 frames = 15;
 240         else if (frames > 30)
 241                 frames = 30;
 242         fps = (frames / 5) - 1;
 243
 244         /* Find a supported framerate with progressively higher compression */
 245         pChoose = NULL;
 246         while (*compression <= 3) {
 247                 pChoose = &Timon_table[size][fps][*compression];
 248                 if (pChoose->alternate != 0)
 249                         break;
 250                 (*compression)++;
 251         }
 252         if (pChoose == NULL || pChoose->alternate == 0)
 253                 return -ENOENT; /* Not supported. */
 254
 255         if (send_to_cam)
 256                 ret = send_video_command(pdev, pdev->vendpoint,
 257                                          pChoose->mode, 13);
 258         if (ret < 0)
 259                 return ret;
 260
 261         if (pChoose->bandlength > 0 && pixfmt == V4L2_PIX_FMT_YUV420)
 262                 pwc_dec23_init(pdev, pChoose->mode);
 263
 264         /* Set various parameters */
 265         pdev->pixfmt = pixfmt;
 266         pdev->vframes = (fps + 1) * 5;
 267         pdev->valternate = pChoose->alternate;
 268         pdev->width  = pwc_image_sizes[size][0];
 269         pdev->height = pwc_image_sizes[size][1];
 270         pdev->vbandlength = pChoose->bandlength;
 271         if (pChoose->bandlength > 0)
 272                 pdev->frame_size = (pChoose->bandlength * pdev->height) / 4;
 273         else
 274                 pdev->frame_size = (pdev->width * pdev->height * 12) / 8;
 275         return 0;
 276 }
 277
 278
 279 static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int pixfmt,
 280                                 int frames, int *compression, int send_to_cam)
 281 {
 282         const struct Kiara_table_entry *pChoose = NULL;
 283         int fps, ret = 0;
 284
 285         if (size >= PSZ_MAX || *compression < 0 || *compression > 3)
 286                 return -EINVAL;
 287         if (frames < 5)
 288                 frames = 5;
 289         else if (size == PSZ_VGA && frames > 15)
 290                 frames = 15;
 291         else if (frames > 30)
 292                 frames = 30;
 293         fps = (frames / 5) - 1;
 294
 295         /* Find a supported framerate with progressively higher compression */
 296         while (*compression <= 3) {
 297                 pChoose = &Kiara_table[size][fps][*compression];
 298                 if (pChoose->alternate != 0)
 299                         break;
 300                 (*compression)++;
 301         }
 302         if (pChoose == NULL || pChoose->alternate == 0)
 303                 return -ENOENT; /* Not supported. */
 304
 305         /* Firmware bug: video endpoint is 5, but commands are sent to endpoint 4 */
 306         if (send_to_cam)
 307                 ret = send_video_command(pdev, 4, pChoose->mode, 12);
 308         if (ret < 0)
 309                 return ret;
 310
 311         if (pChoose->bandlength > 0 && pixfmt == V4L2_PIX_FMT_YUV420)
 312                 pwc_dec23_init(pdev, pChoose->mode);
 313
 314         /* All set and go */
 315         pdev->pixfmt = pixfmt;
 316         pdev->vframes = (fps + 1) * 5;
 317         pdev->valternate = pChoose->alternate;
 318         pdev->width  = pwc_image_sizes[size][0];
 319         pdev->height = pwc_image_sizes[size][1];
 320         pdev->vbandlength = pChoose->bandlength;
 321         if (pdev->vbandlength > 0)
 322                 pdev->frame_size = (pdev->vbandlength * pdev->height) / 4;
 323         else
 324                 pdev->frame_size = (pdev->width * pdev->height * 12) / 8;
 325         PWC_TRACE("frame_size=%d, vframes=%d, vsize=%d, vbandlength=%d\n",
 326             pdev->frame_size, pdev->vframes, size, pdev->vbandlength);
 327         return 0;
 328 }
 329
 330 int pwc_set_video_mode(struct pwc_device *pdev, int width, int height,
 331         int pixfmt, int frames, int *compression, int send_to_cam)
 332 {
 333         int ret, size;
 334
 335         PWC_DEBUG_FLOW("set_video_mode(%dx%d @ %d, pixfmt %08x).\n",
 336                        width, height, frames, pixfmt);
 337         size = pwc_get_size(pdev, width, height);
 338         PWC_TRACE("decode_size = %d.\n", size);
 339
 340         if (DEVICE_USE_CODEC1(pdev->type)) {
 341                 ret = set_video_mode_Nala(pdev, size, pixfmt, frames,
 342                                           compression, send_to_cam);
 343         } else if (DEVICE_USE_CODEC3(pdev->type)) {
 344                 ret = set_video_mode_Kiara(pdev, size, pixfmt, frames,
 345                                            compression, send_to_cam);
 346         } else {
 347                 ret = set_video_mode_Timon(pdev, size, pixfmt, frames,
 348                                            compression, send_to_cam);
 349         }
 350         if (ret < 0) {
 351                 PWC_ERROR("Failed to set video mode %s@%d fps; return code = %d\n", size2name[size], frames, ret);
 352                 return ret;
 353         }
 354         pdev->frame_total_size = pdev->frame_size + pdev->frame_header_size + pdev->frame_trailer_size;
 355         PWC_DEBUG_SIZE("Set resolution to %dx%d\n", pdev->width, pdev->height);
 356         return 0;
 357 }
 358
 359 static unsigned int pwc_get_fps_Nala(struct pwc_device *pdev, unsigned int index, unsigned int size)
 360 {
 361         unsigned int i;
 362
 363         for (i = 0; i < PWC_FPS_MAX_NALA; i++) {
 364                 if (Nala_table[size][i].alternate) {
 365                         if (index--==0) return Nala_fps_vector[i];
 366                 }
 367         }
 368         return 0;
 369 }
 370
 371 static unsigned int pwc_get_fps_Kiara(struct pwc_device *pdev, unsigned int index, unsigned int size)
 372 {
 373         unsigned int i;
 374
 375         for (i = 0; i < PWC_FPS_MAX_KIARA; i++) {
 376                 if (Kiara_table[size][i][3].alternate) {
 377                         if (index--==0) return Kiara_fps_vector[i];
 378                 }
 379         }
 380         return 0;
 381 }
 382
 383 static unsigned int pwc_get_fps_Timon(struct pwc_device *pdev, unsigned int index, unsigned int size)
 384 {
 385         unsigned int i;
 386
 387         for (i=0; i < PWC_FPS_MAX_TIMON; i++) {
 388                 if (Timon_table[size][i][3].alternate) {
 389                         if (index--==0) return Timon_fps_vector[i];
 390                 }
 391         }
 392         return 0;
 393 }
 394
 395 unsigned int pwc_get_fps(struct pwc_device *pdev, unsigned int index, unsigned int size)
 396 {
 397         unsigned int ret;
 398
 399         if (DEVICE_USE_CODEC1(pdev->type)) {
 400                 ret = pwc_get_fps_Nala(pdev, index, size);
 401
 402         } else if (DEVICE_USE_CODEC3(pdev->type)) {
 403                 ret = pwc_get_fps_Kiara(pdev, index, size);
 404
 405         } else {
 406                 ret = pwc_get_fps_Timon(pdev, index, size);
 407         }
 408
 409         return ret;
 410 }
 411
 412 int pwc_get_u8_ctrl(struct pwc_device *pdev, u8 request, u16 value, int *data)
 413 {
 414         int ret;
 415
 416         ret = recv_control_msg(pdev, request, value, 1);
 417         if (ret < 0)
 418                 return ret;
 419
 420         *data = pdev->ctrl_buf[0];
 421         return 0;
 422 }
 423
 424 int pwc_set_u8_ctrl(struct pwc_device *pdev, u8 request, u16 value, u8 data)
 425 {
 426         int ret;
 427
 428         pdev->ctrl_buf[0] = data;
 429         ret = send_control_msg(pdev, request, value, pdev->ctrl_buf, 1);
 430         if (ret < 0)
 431                 return ret;
 432
 433         return 0;
 434 }
 435
 436 int pwc_get_s8_ctrl(struct pwc_device *pdev, u8 request, u16 value, int *data)
 437 {
 438         int ret;
 439
 440         ret = recv_control_msg(pdev, request, value, 1);
 441         if (ret < 0)
 442                 return ret;
 443
 444         *data = ((s8 *)pdev->ctrl_buf)[0];
 445         return 0;
 446 }
 447
 448 int pwc_get_u16_ctrl(struct pwc_device *pdev, u8 request, u16 value, int *data)
 449 {
 450         int ret;
 451
 452         ret = recv_control_msg(pdev, request, value, 2);
 453         if (ret < 0)
 454                 return ret;
 455
 456         *data = (pdev->ctrl_buf[1] << 8) | pdev->ctrl_buf[0];
 457         return 0;
 458 }
 459
 460 int pwc_set_u16_ctrl(struct pwc_device *pdev, u8 request, u16 value, u16 data)
 461 {
 462         int ret;
 463
 464         pdev->ctrl_buf[0] = data & 0xff;
 465         pdev->ctrl_buf[1] = data >> 8;
 466         ret = send_control_msg(pdev, request, value, pdev->ctrl_buf, 2);
 467         if (ret < 0)
 468                 return ret;
 469
 470         return 0;
 471 }
 472
 473 int pwc_button_ctrl(struct pwc_device *pdev, u16 value)
 474 {
 475         int ret;
 476
 477         ret = send_control_msg(pdev, SET_STATUS_CTL, value, NULL, 0);
 478         if (ret < 0)
 479                 return ret;
 480
 481         return 0;
 482 }
 483
 484 /* POWER */
 485 void pwc_camera_power(struct pwc_device *pdev, int power)
 486 {
 487         int r;
 488
 489         if (!pdev->power_save)
 490                 return;
 491
 492         if (pdev->type < 675 || (pdev->type < 730 && pdev->release < 6))
 493                 return; /* Not supported by Nala or Timon < release 6 */
 494
 495         if (power)
 496                 pdev->ctrl_buf[0] = 0x00; /* active */
 497         else
 498                 pdev->ctrl_buf[0] = 0xFF; /* power save */
 499         r = send_control_msg(pdev, SET_STATUS_CTL,
 500                 SET_POWER_SAVE_MODE_FORMATTER, pdev->ctrl_buf, 1);
 501         if (r < 0)
 502                 PWC_ERROR("Failed to power %s camera (%d)\n",
 503                           power ? "on" : "off", r);
 504 }
 505
 506 int pwc_set_leds(struct pwc_device *pdev, int on_value, int off_value)
 507 {
 508         int r;
 509
 510         if (pdev->type < 730)
 511                 return 0;
 512         on_value /= 100;
 513         off_value /= 100;
 514         if (on_value < 0)
 515                 on_value = 0;
 516         if (on_value > 0xff)
 517                 on_value = 0xff;
 518         if (off_value < 0)
 519                 off_value = 0;
 520         if (off_value > 0xff)
 521                 off_value = 0xff;
 522
 523         pdev->ctrl_buf[0] = on_value;
 524         pdev->ctrl_buf[1] = off_value;
 525
 526         r = send_control_msg(pdev,
 527                 SET_STATUS_CTL, LED_FORMATTER, pdev->ctrl_buf, 2);
 528         if (r < 0)
 529                 PWC_ERROR("Failed to set LED on/off time (%d)\n", r);
 530
 531         return r;
 532 }
 533
 534 #ifdef CONFIG_USB_PWC_DEBUG
 535 int pwc_get_cmos_sensor(struct pwc_device *pdev, int *sensor)
 536 {
 537         int ret = -1, request;
 538
 539         if (pdev->type < 675)
 540                 request = SENSOR_TYPE_FORMATTER1;
 541         else if (pdev->type < 730)
 542                 return -1; /* The Vesta series doesn't have this call */
 543         else
 544                 request = SENSOR_TYPE_FORMATTER2;
 545
 546         ret = recv_control_msg(pdev, GET_STATUS_CTL, request, 1);
 547         if (ret < 0)
 548                 return ret;
 549         if (pdev->type < 675)
 550                 *sensor = pdev->ctrl_buf[0] | 0x100;
 551         else
 552                 *sensor = pdev->ctrl_buf[0];
 553         return 0;
 554 }
 555 #endif