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

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
recv_control_msg
send_video_command
send_control_msg
set_video_mode_Nala
set_video_mode_Timon
set_video_mode_Kiara
pwc_set_video_mode
pwc_get_fps_Nala
pwc_get_fps_Kiara
pwc_get_fps_Timon
pwc_get_fps
pwc_get_u8_ctrl
pwc_set_u8_ctrl
pwc_get_s8_ctrl
pwc_get_u16_ctrl
pwc_set_u16_ctrl
pwc_button_ctrl
pwc_camera_power
pwc_set_leds
pwc_get_cmos_sensor
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* Driver for Philips webcam
   3    Functions that send various control messages to the webcam, including
   4    video modes.
   5    (C) 1999-2003 Nemosoft Unv.
   6    (C) 2004-2006 Luc Saillard (luc@saillard.org)
   7    (C) 2011 Hans de Goede <hdegoede@redhat.com>
   8 
   9    NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
  10    driver and thus may have bugs that are not present in the original version.
  11    Please send bug reports and support requests to <luc@saillard.org>.
  12 
  13    NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
  14    driver and thus may have bugs that are not present in the original version.
  15    Please send bug reports and support requests to <luc@saillard.org>.
  16    The decompression routines have been implemented by reverse-engineering the
  17    Nemosoft binary pwcx module. Caveat emptor.
  18 
  19 */
  20 
  21 /*
  22    Changes
  23    2001/08/03  Alvarado   Added methods for changing white balance and
  24                           red/green gains
  25  */
  26 
  27 /* Control functions for the cam; brightness, contrast, video mode, etc. */
  28 
  29 #ifdef __KERNEL__
  30 #include <linux/uaccess.h>
  31 #endif
  32 #include <asm/errno.h>
  33 
  34 #include "pwc.h"
  35 #include "pwc-kiara.h"
  36 #include "pwc-timon.h"
  37 #include "pwc-dec1.h"
  38 #include "pwc-dec23.h"
  39 
  40 /* Selectors for status controls used only in this file */
  41 #define GET_STATUS_B00                          0x0B00
  42 #define SENSOR_TYPE_FORMATTER1                  0x0C00
  43 #define GET_STATUS_3000                         0x3000
  44 #define READ_RAW_Y_MEAN_FORMATTER               0x3100
  45 #define SET_POWER_SAVE_MODE_FORMATTER           0x3200
  46 #define MIRROR_IMAGE_FORMATTER                  0x3300
  47 #define LED_FORMATTER                           0x3400
  48 #define LOWLIGHT                                0x3500
  49 #define GET_STATUS_3600                         0x3600
  50 #define SENSOR_TYPE_FORMATTER2                  0x3700
  51 #define GET_STATUS_3800                         0x3800
  52 #define GET_STATUS_4000                         0x4000
  53 #define GET_STATUS_4100                         0x4100  /* Get */
  54 #define CTL_STATUS_4200                         0x4200  /* [GS] 1 */
  55 
  56 /* Formatters for the Video Endpoint controls [GS]ET_EP_STREAM_CTL */
  57 #define VIDEO_OUTPUT_CONTROL_FORMATTER          0x0100
  58 
  59 static const char *size2name[PSZ_MAX] =
  60 {
  61         "subQCIF",
  62         "QSIF",
  63         "QCIF",
  64         "SIF",
  65         "CIF",
  66         "VGA",
  67 };
  68 
  69 /********/
  70 
  71 /* Entries for the Nala (645/646) camera; the Nala doesn't have compression
  72    preferences, so you either get compressed or non-compressed streams.
  73 
  74    An alternate value of 0 means this mode is not available at all.
  75  */
  76 
  77 #define PWC_FPS_MAX_NALA 8
  78 
  79 struct Nala_table_entry {
  80         char alternate;                 /* USB alternate setting */
  81         int compressed;                 /* Compressed yes/no */
  82 
  83         unsigned char mode[3];          /* precomputed mode table */
  84 };
  85 
  86 static unsigned int Nala_fps_vector[PWC_FPS_MAX_NALA] = { 4, 5, 7, 10, 12, 15, 20, 24 };
  87 
  88 static struct Nala_table_entry Nala_table[PSZ_MAX][PWC_FPS_MAX_NALA] =
  89 {
  90 #include "pwc-nala.h"
  91 };
  92 
  93 /****************************************************************************/
  94 
  95 static int recv_control_msg(struct pwc_device *pdev,
  96         u8 request, u16 value, int recv_count)
  97 {
  98         int rc;
  99 
 100         rc = usb_control_msg(pdev->udev, usb_rcvctrlpipe(pdev->udev, 0),
 101                 request,
 102                 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 103                 value, pdev->vcinterface,
 104                 pdev->ctrl_buf, recv_count, USB_CTRL_GET_TIMEOUT);
 105         if (rc < 0)
 106                 PWC_ERROR("recv_control_msg error %d req %02x val %04x\n",
 107                           rc, request, value);
 108         return rc;
 109 }
 110 
 111 static inline int send_video_command(struct pwc_device *pdev,
 112         int index, const unsigned char *buf, int buflen)
 113 {
 114         int rc;
 115 
 116         memcpy(pdev->ctrl_buf, buf, buflen);
 117 
 118         rc = usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
 119                         SET_EP_STREAM_CTL,
 120                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 121                         VIDEO_OUTPUT_CONTROL_FORMATTER, index,
 122                         pdev->ctrl_buf, buflen, USB_CTRL_SET_TIMEOUT);
 123         if (rc >= 0)
 124                 memcpy(pdev->cmd_buf, buf, buflen);
 125         else
 126                 PWC_ERROR("send_video_command error %d\n", rc);
 127 
 128         return rc;
 129 }
 130 
 131 int send_control_msg(struct pwc_device *pdev,
 132         u8 request, u16 value, void *buf, int buflen)
 133 {
 134         return usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
 135                         request,
 136                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 137                         value, pdev->vcinterface,
 138                         buf, buflen, USB_CTRL_SET_TIMEOUT);
 139 }
 140 
 141 static int set_video_mode_Nala(struct pwc_device *pdev, int size, int pixfmt,
 142                                int frames, int *compression, int send_to_cam)
 143 {
 144         int fps, ret = 0;
 145         struct Nala_table_entry *pEntry;
 146         int frames2frames[31] =
 147         { /* closest match of framerate */
 148            0,  0,  0,  0,  4,  /*  0-4  */
 149            5,  5,  7,  7, 10,  /*  5-9  */
 150           10, 10, 12, 12, 15,  /* 10-14 */
 151           15, 15, 15, 20, 20,  /* 15-19 */
 152           20, 20, 20, 24, 24,  /* 20-24 */
 153           24, 24, 24, 24, 24,  /* 25-29 */
 154           24                   /* 30    */
 155         };
 156         int frames2table[31] =
 157         { 0, 0, 0, 0, 0, /*  0-4  */
 158           1, 1, 1, 2, 2, /*  5-9  */
 159           3, 3, 4, 4, 4, /* 10-14 */
 160           5, 5, 5, 5, 5, /* 15-19 */
 161           6, 6, 6, 6, 7, /* 20-24 */
 162           7, 7, 7, 7, 7, /* 25-29 */
 163           7              /* 30    */
 164         };
 165 
 166         if (size < 0 || size > PSZ_CIF)
 167                 return -EINVAL;
 168         if (frames < 4)
 169                 frames = 4;
 170         else if (size > PSZ_QCIF && frames > 15)
 171                 frames = 15;
 172         else if (frames > 25)
 173                 frames = 25;
 174         frames = frames2frames[frames];
 175         fps = frames2table[frames];
 176         pEntry = &Nala_table[size][fps];
 177         if (pEntry->alternate == 0)
 178                 return -EINVAL;
 179 
 180         if (send_to_cam)
 181                 ret = send_video_command(pdev, pdev->vendpoint,
 182                                          pEntry->mode, 3);
 183         if (ret < 0)
 184                 return ret;
 185 
 186         if (pEntry->compressed && pixfmt == V4L2_PIX_FMT_YUV420)
 187                 pwc_dec1_init(pdev, pEntry->mode);
 188 
 189         /* Set various parameters */
 190         pdev->pixfmt = pixfmt;
 191         pdev->vframes = frames;
 192         pdev->valternate = pEntry->alternate;
 193         pdev->width  = pwc_image_sizes[size][0];
 194         pdev->height = pwc_image_sizes[size][1];
 195         pdev->frame_size = (pdev->width * pdev->height * 3) / 2;
 196         if (pEntry->compressed) {
 197                 if (pdev->release < 5) { /* 4 fold compression */
 198                         pdev->vbandlength = 528;
 199                         pdev->frame_size /= 4;
 200                 }
 201                 else {
 202                         pdev->vbandlength = 704;
 203                         pdev->frame_size /= 3;
 204                 }
 205         }
 206         else
 207                 pdev->vbandlength = 0;
 208 
 209         /* Let pwc-if.c:isoc_init know we don't support higher compression */
 210         *compression = 3;
 211 
 212         return 0;
 213 }
 214 
 215 
 216 static int set_video_mode_Timon(struct pwc_device *pdev, int size, int pixfmt,
 217                                 int frames, int *compression, int send_to_cam)
 218 {
 219         const struct Timon_table_entry *pChoose;
 220         int fps, ret = 0;
 221 
 222         if (size >= PSZ_MAX || *compression < 0 || *compression > 3)
 223                 return -EINVAL;
 224         if (frames < 5)
 225                 frames = 5;
 226         else if (size == PSZ_VGA && frames > 15)
 227                 frames = 15;
 228         else if (frames > 30)
 229                 frames = 30;
 230         fps = (frames / 5) - 1;
 231 
 232         /* Find a supported framerate with progressively higher compression */
 233         do {
 234                 pChoose = &Timon_table[size][fps][*compression];
 235                 if (pChoose->alternate != 0)
 236                         break;
 237                 (*compression)++;
 238         } while (*compression <= 3);
 239 
 240         if (pChoose->alternate == 0)
 241                 return -ENOENT; /* Not supported. */
 242 
 243         if (send_to_cam)
 244                 ret = send_video_command(pdev, pdev->vendpoint,
 245                                          pChoose->mode, 13);
 246         if (ret < 0)
 247                 return ret;
 248 
 249         if (pChoose->bandlength > 0 && pixfmt == V4L2_PIX_FMT_YUV420)
 250                 pwc_dec23_init(pdev, pChoose->mode);
 251 
 252         /* Set various parameters */
 253         pdev->pixfmt = pixfmt;
 254         pdev->vframes = (fps + 1) * 5;
 255         pdev->valternate = pChoose->alternate;
 256         pdev->width  = pwc_image_sizes[size][0];
 257         pdev->height = pwc_image_sizes[size][1];
 258         pdev->vbandlength = pChoose->bandlength;
 259         if (pChoose->bandlength > 0)
 260                 pdev->frame_size = (pChoose->bandlength * pdev->height) / 4;
 261         else
 262                 pdev->frame_size = (pdev->width * pdev->height * 12) / 8;
 263         return 0;
 264 }
 265 
 266 
 267 static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int pixfmt,
 268                                 int frames, int *compression, int send_to_cam)
 269 {
 270         const struct Kiara_table_entry *pChoose;
 271         int fps, ret = 0;
 272 
 273         if (size >= PSZ_MAX || *compression < 0 || *compression > 3)
 274                 return -EINVAL;
 275         if (frames < 5)
 276                 frames = 5;
 277         else if (size == PSZ_VGA && frames > 15)
 278                 frames = 15;
 279         else if (frames > 30)
 280                 frames = 30;
 281         fps = (frames / 5) - 1;
 282 
 283         /* Find a supported framerate with progressively higher compression */
 284         do {
 285                 pChoose = &Kiara_table[size][fps][*compression];
 286                 if (pChoose->alternate != 0)
 287                         break;
 288                 (*compression)++;
 289         } while (*compression <= 3);
 290 
 291         if (pChoose->alternate == 0)
 292                 return -ENOENT; /* Not supported. */
 293 
 294         /* Firmware bug: video endpoint is 5, but commands are sent to endpoint 4 */
 295         if (send_to_cam)
 296                 ret = send_video_command(pdev, 4, pChoose->mode, 12);
 297         if (ret < 0)
 298                 return ret;
 299 
 300         if (pChoose->bandlength > 0 && pixfmt == V4L2_PIX_FMT_YUV420)
 301                 pwc_dec23_init(pdev, pChoose->mode);
 302 
 303         /* All set and go */
 304         pdev->pixfmt = pixfmt;
 305         pdev->vframes = (fps + 1) * 5;
 306         pdev->valternate = pChoose->alternate;
 307         pdev->width  = pwc_image_sizes[size][0];
 308         pdev->height = pwc_image_sizes[size][1];
 309         pdev->vbandlength = pChoose->bandlength;
 310         if (pdev->vbandlength > 0)
 311                 pdev->frame_size = (pdev->vbandlength * pdev->height) / 4;
 312         else
 313                 pdev->frame_size = (pdev->width * pdev->height * 12) / 8;
 314         PWC_TRACE("frame_size=%d, vframes=%d, vsize=%d, vbandlength=%d\n",
 315             pdev->frame_size, pdev->vframes, size, pdev->vbandlength);
 316         return 0;
 317 }
 318 
 319 int pwc_set_video_mode(struct pwc_device *pdev, int width, int height,
 320         int pixfmt, int frames, int *compression, int send_to_cam)
 321 {
 322         int ret, size;
 323 
 324         PWC_DEBUG_FLOW("set_video_mode(%dx%d @ %d, pixfmt %08x).\n",
 325                        width, height, frames, pixfmt);
 326         size = pwc_get_size(pdev, width, height);
 327         PWC_TRACE("decode_size = %d.\n", size);
 328 
 329         if (DEVICE_USE_CODEC1(pdev->type)) {
 330                 ret = set_video_mode_Nala(pdev, size, pixfmt, frames,
 331                                           compression, send_to_cam);
 332         } else if (DEVICE_USE_CODEC3(pdev->type)) {
 333                 ret = set_video_mode_Kiara(pdev, size, pixfmt, frames,
 334                                            compression, send_to_cam);
 335         } else {
 336                 ret = set_video_mode_Timon(pdev, size, pixfmt, frames,
 337                                            compression, send_to_cam);
 338         }
 339         if (ret < 0) {
 340                 PWC_ERROR("Failed to set video mode %s@%d fps; return code = %d\n", size2name[size], frames, ret);
 341                 return ret;
 342         }
 343         pdev->frame_total_size = pdev->frame_size + pdev->frame_header_size + pdev->frame_trailer_size;
 344         PWC_DEBUG_SIZE("Set resolution to %dx%d\n", pdev->width, pdev->height);
 345         return 0;
 346 }
 347 
 348 static unsigned int pwc_get_fps_Nala(struct pwc_device *pdev, unsigned int index, unsigned int size)
 349 {
 350         unsigned int i;
 351 
 352         for (i = 0; i < PWC_FPS_MAX_NALA; i++) {
 353                 if (Nala_table[size][i].alternate) {
 354                         if (index--==0) return Nala_fps_vector[i];
 355                 }
 356         }
 357         return 0;
 358 }
 359 
 360 static unsigned int pwc_get_fps_Kiara(struct pwc_device *pdev, unsigned int index, unsigned int size)
 361 {
 362         unsigned int i;
 363 
 364         for (i = 0; i < PWC_FPS_MAX_KIARA; i++) {
 365                 if (Kiara_table[size][i][3].alternate) {
 366                         if (index--==0) return Kiara_fps_vector[i];
 367                 }
 368         }
 369         return 0;
 370 }
 371 
 372 static unsigned int pwc_get_fps_Timon(struct pwc_device *pdev, unsigned int index, unsigned int size)
 373 {
 374         unsigned int i;
 375 
 376         for (i=0; i < PWC_FPS_MAX_TIMON; i++) {
 377                 if (Timon_table[size][i][3].alternate) {
 378                         if (index--==0) return Timon_fps_vector[i];
 379                 }
 380         }
 381         return 0;
 382 }
 383 
 384 unsigned int pwc_get_fps(struct pwc_device *pdev, unsigned int index, unsigned int size)
 385 {
 386         unsigned int ret;
 387 
 388         if (DEVICE_USE_CODEC1(pdev->type)) {
 389                 ret = pwc_get_fps_Nala(pdev, index, size);
 390 
 391         } else if (DEVICE_USE_CODEC3(pdev->type)) {
 392                 ret = pwc_get_fps_Kiara(pdev, index, size);
 393 
 394         } else {
 395                 ret = pwc_get_fps_Timon(pdev, index, size);
 396         }
 397 
 398         return ret;
 399 }
 400 
 401 int pwc_get_u8_ctrl(struct pwc_device *pdev, u8 request, u16 value, int *data)
 402 {
 403         int ret;
 404 
 405         ret = recv_control_msg(pdev, request, value, 1);
 406         if (ret < 0)
 407                 return ret;
 408 
 409         *data = pdev->ctrl_buf[0];
 410         return 0;
 411 }
 412 
 413 int pwc_set_u8_ctrl(struct pwc_device *pdev, u8 request, u16 value, u8 data)
 414 {
 415         int ret;
 416 
 417         pdev->ctrl_buf[0] = data;
 418         ret = send_control_msg(pdev, request, value, pdev->ctrl_buf, 1);
 419         if (ret < 0)
 420                 return ret;
 421 
 422         return 0;
 423 }
 424 
 425 int pwc_get_s8_ctrl(struct pwc_device *pdev, u8 request, u16 value, int *data)
 426 {
 427         int ret;
 428 
 429         ret = recv_control_msg(pdev, request, value, 1);
 430         if (ret < 0)
 431                 return ret;
 432 
 433         *data = ((s8 *)pdev->ctrl_buf)[0];
 434         return 0;
 435 }
 436 
 437 int pwc_get_u16_ctrl(struct pwc_device *pdev, u8 request, u16 value, int *data)
 438 {
 439         int ret;
 440 
 441         ret = recv_control_msg(pdev, request, value, 2);
 442         if (ret < 0)
 443                 return ret;
 444 
 445         *data = (pdev->ctrl_buf[1] << 8) | pdev->ctrl_buf[0];
 446         return 0;
 447 }
 448 
 449 int pwc_set_u16_ctrl(struct pwc_device *pdev, u8 request, u16 value, u16 data)
 450 {
 451         int ret;
 452 
 453         pdev->ctrl_buf[0] = data & 0xff;
 454         pdev->ctrl_buf[1] = data >> 8;
 455         ret = send_control_msg(pdev, request, value, pdev->ctrl_buf, 2);
 456         if (ret < 0)
 457                 return ret;
 458 
 459         return 0;
 460 }
 461 
 462 int pwc_button_ctrl(struct pwc_device *pdev, u16 value)
 463 {
 464         int ret;
 465 
 466         ret = send_control_msg(pdev, SET_STATUS_CTL, value, NULL, 0);
 467         if (ret < 0)
 468                 return ret;
 469 
 470         return 0;
 471 }
 472 
 473 /* POWER */
 474 void pwc_camera_power(struct pwc_device *pdev, int power)
 475 {
 476         int r;
 477 
 478         if (!pdev->power_save)
 479                 return;
 480 
 481         if (pdev->type < 675 || (pdev->type < 730 && pdev->release < 6))
 482                 return; /* Not supported by Nala or Timon < release 6 */
 483 
 484         if (power)
 485                 pdev->ctrl_buf[0] = 0x00; /* active */
 486         else
 487                 pdev->ctrl_buf[0] = 0xFF; /* power save */
 488         r = send_control_msg(pdev, SET_STATUS_CTL,
 489                 SET_POWER_SAVE_MODE_FORMATTER, pdev->ctrl_buf, 1);
 490         if (r < 0)
 491                 PWC_ERROR("Failed to power %s camera (%d)\n",
 492                           power ? "on" : "off", r);
 493 }
 494 
 495 int pwc_set_leds(struct pwc_device *pdev, int on_value, int off_value)
 496 {
 497         int r;
 498 
 499         if (pdev->type < 730)
 500                 return 0;
 501         on_value /= 100;
 502         off_value /= 100;
 503         if (on_value < 0)
 504                 on_value = 0;
 505         if (on_value > 0xff)
 506                 on_value = 0xff;
 507         if (off_value < 0)
 508                 off_value = 0;
 509         if (off_value > 0xff)
 510                 off_value = 0xff;
 511 
 512         pdev->ctrl_buf[0] = on_value;
 513         pdev->ctrl_buf[1] = off_value;
 514 
 515         r = send_control_msg(pdev,
 516                 SET_STATUS_CTL, LED_FORMATTER, pdev->ctrl_buf, 2);
 517         if (r < 0)
 518                 PWC_ERROR("Failed to set LED on/off time (%d)\n", r);
 519 
 520         return r;
 521 }
 522 
 523 #ifdef CONFIG_USB_PWC_DEBUG
 524 int pwc_get_cmos_sensor(struct pwc_device *pdev, int *sensor)
 525 {
 526         int ret = -1, request;
 527 
 528         if (pdev->type < 675)
 529                 request = SENSOR_TYPE_FORMATTER1;
 530         else if (pdev->type < 730)
 531                 return -1; /* The Vesta series doesn't have this call */
 532         else
 533                 request = SENSOR_TYPE_FORMATTER2;
 534 
 535         ret = recv_control_msg(pdev, GET_STATUS_CTL, request, 1);
 536         if (ret < 0)
 537                 return ret;
 538         if (pdev->type < 675)
 539                 *sensor = pdev->ctrl_buf[0] | 0x100;
 540         else
 541                 *sensor = pdev->ctrl_buf[0];
 542         return 0;
 543 }
 544 #endif
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/media/usb/pwc/pwc-ctrl.c

DEFINITIONS
