1/* 2 em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB 3 video capture devices 4 5 Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> 6 Markus Rechberger <mrechberger@gmail.com> 7 Mauro Carvalho Chehab <mchehab@infradead.org> 8 Sascha Sommer <saschasommer@freenet.de> 9 10 Some parts based on SN9C10x PC Camera Controllers GPL driver made 11 by Luca Risolia <luca.risolia@studio.unibo.it> 12 13 This program is free software; you can redistribute it and/or modify 14 it under the terms of the GNU General Public License as published by 15 the Free Software Foundation; either version 2 of the License, or 16 (at your option) any later version. 17 18 This program is distributed in the hope that it will be useful, 19 but WITHOUT ANY WARRANTY; without even the implied warranty of 20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 GNU General Public License for more details. 22 23 You should have received a copy of the GNU General Public License 24 along with this program; if not, write to the Free Software 25 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 26 */ 27 28#include <linux/init.h> 29#include <linux/list.h> 30#include <linux/module.h> 31#include <linux/kernel.h> 32#include <linux/bitmap.h> 33#include <linux/usb.h> 34#include <linux/i2c.h> 35#include <linux/mm.h> 36#include <linux/mutex.h> 37#include <linux/slab.h> 38 39#include "em28xx.h" 40#include <media/v4l2-common.h> 41#include <media/v4l2-ioctl.h> 42#include <media/v4l2-chip-ident.h> 43#include <media/msp3400.h> 44#include <media/tuner.h> 45 46#define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \ 47 "Markus Rechberger <mrechberger@gmail.com>, " \ 48 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \ 49 "Sascha Sommer <saschasommer@freenet.de>" 50 51#define DRIVER_DESC "Empia em28xx based USB video device driver" 52 53#define EM28XX_VERSION "0.1.3" 54 55#define em28xx_videodbg(fmt, arg...) do {\ 56 if (video_debug) \ 57 printk(KERN_INFO "%s %s :"fmt, \ 58 dev->name, __func__ , ##arg); } while (0) 59 60static unsigned int isoc_debug; 61module_param(isoc_debug, int, 0644); 62MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]"); 63 64#define em28xx_isocdbg(fmt, arg...) \ 65do {\ 66 if (isoc_debug) { \ 67 printk(KERN_INFO "%s %s :"fmt, \ 68 dev->name, __func__ , ##arg); \ 69 } \ 70 } while (0) 71 72MODULE_AUTHOR(DRIVER_AUTHOR); 73MODULE_DESCRIPTION(DRIVER_DESC); 74MODULE_LICENSE("GPL"); 75MODULE_VERSION(EM28XX_VERSION); 76 77static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; 78static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; 79static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; 80 81module_param_array(video_nr, int, NULL, 0444); 82module_param_array(vbi_nr, int, NULL, 0444); 83module_param_array(radio_nr, int, NULL, 0444); 84MODULE_PARM_DESC(video_nr, "video device numbers"); 85MODULE_PARM_DESC(vbi_nr, "vbi device numbers"); 86MODULE_PARM_DESC(radio_nr, "radio device numbers"); 87 88static unsigned int video_debug; 89module_param(video_debug, int, 0644); 90MODULE_PARM_DESC(video_debug, "enable debug messages [video]"); 91 92/* supported video standards */ 93static struct em28xx_fmt format[] = { 94 { 95 .name = "16 bpp YUY2, 4:2:2, packed", 96 .fourcc = V4L2_PIX_FMT_YUYV, 97 .depth = 16, 98 .reg = EM28XX_OUTFMT_YUV422_Y0UY1V, 99 }, { 100 .name = "16 bpp RGB 565, LE", 101 .fourcc = V4L2_PIX_FMT_RGB565, 102 .depth = 16, 103 .reg = EM28XX_OUTFMT_RGB_16_656, 104 }, { 105 .name = "8 bpp Bayer BGBG..GRGR", 106 .fourcc = V4L2_PIX_FMT_SBGGR8, 107 .depth = 8, 108 .reg = EM28XX_OUTFMT_RGB_8_BGBG, 109 }, { 110 .name = "8 bpp Bayer GRGR..BGBG", 111 .fourcc = V4L2_PIX_FMT_SGRBG8, 112 .depth = 8, 113 .reg = EM28XX_OUTFMT_RGB_8_GRGR, 114 }, { 115 .name = "8 bpp Bayer GBGB..RGRG", 116 .fourcc = V4L2_PIX_FMT_SGBRG8, 117 .depth = 8, 118 .reg = EM28XX_OUTFMT_RGB_8_GBGB, 119 }, { 120 .name = "12 bpp YUV411", 121 .fourcc = V4L2_PIX_FMT_YUV411P, 122 .depth = 12, 123 .reg = EM28XX_OUTFMT_YUV411, 124 }, 125}; 126 127/* supported controls */ 128/* Common to all boards */ 129static struct v4l2_queryctrl ac97_qctrl[] = { 130 { 131 .id = V4L2_CID_AUDIO_VOLUME, 132 .type = V4L2_CTRL_TYPE_INTEGER, 133 .name = "Volume", 134 .minimum = 0x0, 135 .maximum = 0x1f, 136 .step = 0x1, 137 .default_value = 0x1f, 138 .flags = V4L2_CTRL_FLAG_SLIDER, 139 }, { 140 .id = V4L2_CID_AUDIO_MUTE, 141 .type = V4L2_CTRL_TYPE_BOOLEAN, 142 .name = "Mute", 143 .minimum = 0, 144 .maximum = 1, 145 .step = 1, 146 .default_value = 1, 147 .flags = 0, 148 } 149}; 150 151/* ------------------------------------------------------------------ 152 DMA and thread functions 153 ------------------------------------------------------------------*/ 154 155/* 156 * Announces that a buffer were filled and request the next 157 */ 158static inline void buffer_filled(struct em28xx *dev, 159 struct em28xx_dmaqueue *dma_q, 160 struct em28xx_buffer *buf) 161{ 162 /* Advice that buffer was filled */ 163 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i); 164 buf->vb.state = VIDEOBUF_DONE; 165 buf->vb.field_count++; 166 do_gettimeofday(&buf->vb.ts); 167 168 dev->isoc_ctl.vid_buf = NULL; 169 170 list_del(&buf->vb.queue); 171 wake_up(&buf->vb.done); 172} 173 174static inline void vbi_buffer_filled(struct em28xx *dev, 175 struct em28xx_dmaqueue *dma_q, 176 struct em28xx_buffer *buf) 177{ 178 /* Advice that buffer was filled */ 179 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i); 180 181 buf->vb.state = VIDEOBUF_DONE; 182 buf->vb.field_count++; 183 do_gettimeofday(&buf->vb.ts); 184 185 dev->isoc_ctl.vbi_buf = NULL; 186 187 list_del(&buf->vb.queue); 188 wake_up(&buf->vb.done); 189} 190 191/* 192 * Identify the buffer header type and properly handles 193 */ 194static void em28xx_copy_video(struct em28xx *dev, 195 struct em28xx_dmaqueue *dma_q, 196 struct em28xx_buffer *buf, 197 unsigned char *p, 198 unsigned char *outp, unsigned long len) 199{ 200 void *fieldstart, *startwrite, *startread; 201 int linesdone, currlinedone, offset, lencopy, remain; 202 int bytesperline = dev->width << 1; 203 204 if (dma_q->pos + len > buf->vb.size) 205 len = buf->vb.size - dma_q->pos; 206 207 startread = p; 208 remain = len; 209 210 if (dev->progressive) 211 fieldstart = outp; 212 else { 213 /* Interlaces two half frames */ 214 if (buf->top_field) 215 fieldstart = outp; 216 else 217 fieldstart = outp + bytesperline; 218 } 219 220 linesdone = dma_q->pos / bytesperline; 221 currlinedone = dma_q->pos % bytesperline; 222 223 if (dev->progressive) 224 offset = linesdone * bytesperline + currlinedone; 225 else 226 offset = linesdone * bytesperline * 2 + currlinedone; 227 228 startwrite = fieldstart + offset; 229 lencopy = bytesperline - currlinedone; 230 lencopy = lencopy > remain ? remain : lencopy; 231 232 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) { 233 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n", 234 ((char *)startwrite + lencopy) - 235 ((char *)outp + buf->vb.size)); 236 remain = (char *)outp + buf->vb.size - (char *)startwrite; 237 lencopy = remain; 238 } 239 if (lencopy <= 0) 240 return; 241 memcpy(startwrite, startread, lencopy); 242 243 remain -= lencopy; 244 245 while (remain > 0) { 246 startwrite += lencopy + bytesperline; 247 startread += lencopy; 248 if (bytesperline > remain) 249 lencopy = remain; 250 else 251 lencopy = bytesperline; 252 253 if ((char *)startwrite + lencopy > (char *)outp + 254 buf->vb.size) { 255 em28xx_isocdbg("Overflow of %zi bytes past buffer end" 256 "(2)\n", 257 ((char *)startwrite + lencopy) - 258 ((char *)outp + buf->vb.size)); 259 lencopy = remain = (char *)outp + buf->vb.size - 260 (char *)startwrite; 261 } 262 if (lencopy <= 0) 263 break; 264 265 memcpy(startwrite, startread, lencopy); 266 267 remain -= lencopy; 268 } 269 270 dma_q->pos += len; 271} 272 273static void em28xx_copy_vbi(struct em28xx *dev, 274 struct em28xx_dmaqueue *dma_q, 275 struct em28xx_buffer *buf, 276 unsigned char *p, 277 unsigned char *outp, unsigned long len) 278{ 279 void *startwrite, *startread; 280 int offset; 281 int bytesperline; 282 283 if (dev == NULL) { 284 em28xx_isocdbg("dev is null\n"); 285 return; 286 } 287 bytesperline = dev->vbi_width; 288 289 if (dma_q == NULL) { 290 em28xx_isocdbg("dma_q is null\n"); 291 return; 292 } 293 if (buf == NULL) { 294 return; 295 } 296 if (p == NULL) { 297 em28xx_isocdbg("p is null\n"); 298 return; 299 } 300 if (outp == NULL) { 301 em28xx_isocdbg("outp is null\n"); 302 return; 303 } 304 305 if (dma_q->pos + len > buf->vb.size) 306 len = buf->vb.size - dma_q->pos; 307 308 startread = p; 309 310 startwrite = outp + dma_q->pos; 311 offset = dma_q->pos; 312 313 /* Make sure the bottom field populates the second half of the frame */ 314 if (buf->top_field == 0) { 315 startwrite += bytesperline * dev->vbi_height; 316 offset += bytesperline * dev->vbi_height; 317 } 318 319 memcpy(startwrite, startread, len); 320 dma_q->pos += len; 321} 322 323static inline void print_err_status(struct em28xx *dev, 324 int packet, int status) 325{ 326 char *errmsg = "Unknown"; 327 328 switch (status) { 329 case -ENOENT: 330 errmsg = "unlinked synchronuously"; 331 break; 332 case -ECONNRESET: 333 errmsg = "unlinked asynchronuously"; 334 break; 335 case -ENOSR: 336 errmsg = "Buffer error (overrun)"; 337 break; 338 case -EPIPE: 339 errmsg = "Stalled (device not responding)"; 340 break; 341 case -EOVERFLOW: 342 errmsg = "Babble (bad cable?)"; 343 break; 344 case -EPROTO: 345 errmsg = "Bit-stuff error (bad cable?)"; 346 break; 347 case -EILSEQ: 348 errmsg = "CRC/Timeout (could be anything)"; 349 break; 350 case -ETIME: 351 errmsg = "Device does not respond"; 352 break; 353 } 354 if (packet < 0) { 355 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg); 356 } else { 357 em28xx_isocdbg("URB packet %d, status %d [%s].\n", 358 packet, status, errmsg); 359 } 360} 361 362/* 363 * video-buf generic routine to get the next available buffer 364 */ 365static inline void get_next_buf(struct em28xx_dmaqueue *dma_q, 366 struct em28xx_buffer **buf) 367{ 368 struct em28xx *dev = container_of(dma_q, struct em28xx, vidq); 369 char *outp; 370 371 if (list_empty(&dma_q->active)) { 372 em28xx_isocdbg("No active queue to serve\n"); 373 dev->isoc_ctl.vid_buf = NULL; 374 *buf = NULL; 375 return; 376 } 377 378 /* Get the next buffer */ 379 *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue); 380 381 /* Cleans up buffer - Useful for testing for frame/URB loss */ 382 outp = videobuf_to_vmalloc(&(*buf)->vb); 383 memset(outp, 0, (*buf)->vb.size); 384 385 dev->isoc_ctl.vid_buf = *buf; 386 387 return; 388} 389 390/* 391 * video-buf generic routine to get the next available VBI buffer 392 */ 393static inline void vbi_get_next_buf(struct em28xx_dmaqueue *dma_q, 394 struct em28xx_buffer **buf) 395{ 396 struct em28xx *dev = container_of(dma_q, struct em28xx, vbiq); 397 char *outp; 398 399 if (list_empty(&dma_q->active)) { 400 em28xx_isocdbg("No active queue to serve\n"); 401 dev->isoc_ctl.vbi_buf = NULL; 402 *buf = NULL; 403 return; 404 } 405 406 /* Get the next buffer */ 407 *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue); 408 /* Cleans up buffer - Useful for testing for frame/URB loss */ 409 outp = videobuf_to_vmalloc(&(*buf)->vb); 410 memset(outp, 0x00, (*buf)->vb.size); 411 412 dev->isoc_ctl.vbi_buf = *buf; 413 414 return; 415} 416 417/* 418 * Controls the isoc copy of each urb packet 419 */ 420static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb) 421{ 422 struct em28xx_buffer *buf; 423 struct em28xx_dmaqueue *dma_q = &dev->vidq; 424 unsigned char *outp = NULL; 425 int i, len = 0, rc = 1; 426 unsigned char *p; 427 428 if (!dev) 429 return 0; 430 431 if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED)) 432 return 0; 433 434 if (urb->status < 0) { 435 print_err_status(dev, -1, urb->status); 436 if (urb->status == -ENOENT) 437 return 0; 438 } 439 440 buf = dev->isoc_ctl.vid_buf; 441 if (buf != NULL) 442 outp = videobuf_to_vmalloc(&buf->vb); 443 444 for (i = 0; i < urb->number_of_packets; i++) { 445 int status = urb->iso_frame_desc[i].status; 446 447 if (status < 0) { 448 print_err_status(dev, i, status); 449 if (urb->iso_frame_desc[i].status != -EPROTO) 450 continue; 451 } 452 453 len = urb->iso_frame_desc[i].actual_length - 4; 454 455 if (urb->iso_frame_desc[i].actual_length <= 0) { 456 /* em28xx_isocdbg("packet %d is empty",i); - spammy */ 457 continue; 458 } 459 if (urb->iso_frame_desc[i].actual_length > 460 dev->max_pkt_size) { 461 em28xx_isocdbg("packet bigger than packet size"); 462 continue; 463 } 464 465 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset; 466 467 /* FIXME: incomplete buffer checks where removed to make 468 logic simpler. Impacts of those changes should be evaluated 469 */ 470 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) { 471 em28xx_isocdbg("VBI HEADER!!!\n"); 472 /* FIXME: Should add vbi copy */ 473 continue; 474 } 475 if (p[0] == 0x22 && p[1] == 0x5a) { 476 em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2], 477 len, (p[2] & 1) ? "odd" : "even"); 478 479 if (dev->progressive || !(p[2] & 1)) { 480 if (buf != NULL) 481 buffer_filled(dev, dma_q, buf); 482 get_next_buf(dma_q, &buf); 483 if (buf == NULL) 484 outp = NULL; 485 else 486 outp = videobuf_to_vmalloc(&buf->vb); 487 } 488 489 if (buf != NULL) { 490 if (p[2] & 1) 491 buf->top_field = 0; 492 else 493 buf->top_field = 1; 494 } 495 496 dma_q->pos = 0; 497 } 498 if (buf != NULL) { 499 if (p[0] != 0x88 && p[0] != 0x22) { 500 em28xx_isocdbg("frame is not complete\n"); 501 len += 4; 502 } else { 503 p += 4; 504 } 505 em28xx_copy_video(dev, dma_q, buf, p, outp, len); 506 } 507 } 508 return rc; 509} 510 511/* Version of isoc handler that takes into account a mixture of video and 512 VBI data */ 513static inline int em28xx_isoc_copy_vbi(struct em28xx *dev, struct urb *urb) 514{ 515 struct em28xx_buffer *buf, *vbi_buf; 516 struct em28xx_dmaqueue *dma_q = &dev->vidq; 517 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq; 518 unsigned char *outp = NULL; 519 unsigned char *vbioutp = NULL; 520 int i, len = 0, rc = 1; 521 unsigned char *p; 522 int vbi_size; 523 524 if (!dev) 525 return 0; 526 527 if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED)) 528 return 0; 529 530 if (urb->status < 0) { 531 print_err_status(dev, -1, urb->status); 532 if (urb->status == -ENOENT) 533 return 0; 534 } 535 536 buf = dev->isoc_ctl.vid_buf; 537 if (buf != NULL) 538 outp = videobuf_to_vmalloc(&buf->vb); 539 540 vbi_buf = dev->isoc_ctl.vbi_buf; 541 if (vbi_buf != NULL) 542 vbioutp = videobuf_to_vmalloc(&vbi_buf->vb); 543 544 for (i = 0; i < urb->number_of_packets; i++) { 545 int status = urb->iso_frame_desc[i].status; 546 547 if (status < 0) { 548 print_err_status(dev, i, status); 549 if (urb->iso_frame_desc[i].status != -EPROTO) 550 continue; 551 } 552 553 len = urb->iso_frame_desc[i].actual_length; 554 if (urb->iso_frame_desc[i].actual_length <= 0) { 555 /* em28xx_isocdbg("packet %d is empty",i); - spammy */ 556 continue; 557 } 558 if (urb->iso_frame_desc[i].actual_length > 559 dev->max_pkt_size) { 560 em28xx_isocdbg("packet bigger than packet size"); 561 continue; 562 } 563 564 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset; 565 566 /* capture type 0 = vbi start 567 capture type 1 = video start 568 capture type 2 = video in progress */ 569 if (p[0] == 0x33 && p[1] == 0x95) { 570 dev->capture_type = 0; 571 dev->vbi_read = 0; 572 em28xx_isocdbg("VBI START HEADER!!!\n"); 573 dev->cur_field = p[2]; 574 p += 4; 575 len -= 4; 576 } else if (p[0] == 0x88 && p[1] == 0x88 && 577 p[2] == 0x88 && p[3] == 0x88) { 578 /* continuation */ 579 p += 4; 580 len -= 4; 581 } else if (p[0] == 0x22 && p[1] == 0x5a) { 582 /* start video */ 583 p += 4; 584 len -= 4; 585 } 586 587 vbi_size = dev->vbi_width * dev->vbi_height; 588 589 if (dev->capture_type == 0) { 590 if (dev->vbi_read >= vbi_size) { 591 /* We've already read all the VBI data, so 592 treat the rest as video */ 593 em28xx_isocdbg("dev->vbi_read > vbi_size\n"); 594 } else if ((dev->vbi_read + len) < vbi_size) { 595 /* This entire frame is VBI data */ 596 if (dev->vbi_read == 0 && 597 (!(dev->cur_field & 1))) { 598 /* Brand new frame */ 599 if (vbi_buf != NULL) 600 vbi_buffer_filled(dev, 601 vbi_dma_q, 602 vbi_buf); 603 vbi_get_next_buf(vbi_dma_q, &vbi_buf); 604 if (vbi_buf == NULL) 605 vbioutp = NULL; 606 else 607 vbioutp = videobuf_to_vmalloc( 608 &vbi_buf->vb); 609 } 610 611 if (dev->vbi_read == 0) { 612 vbi_dma_q->pos = 0; 613 if (vbi_buf != NULL) { 614 if (dev->cur_field & 1) 615 vbi_buf->top_field = 0; 616 else 617 vbi_buf->top_field = 1; 618 } 619 } 620 621 dev->vbi_read += len; 622 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p, 623 vbioutp, len); 624 } else { 625 /* Some of this frame is VBI data and some is 626 video data */ 627 int vbi_data_len = vbi_size - dev->vbi_read; 628 dev->vbi_read += vbi_data_len; 629 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p, 630 vbioutp, vbi_data_len); 631 dev->capture_type = 1; 632 p += vbi_data_len; 633 len -= vbi_data_len; 634 } 635 } 636 637 if (dev->capture_type == 1) { 638 dev->capture_type = 2; 639 if (dev->progressive || !(dev->cur_field & 1)) { 640 if (buf != NULL) 641 buffer_filled(dev, dma_q, buf); 642 get_next_buf(dma_q, &buf); 643 if (buf == NULL) 644 outp = NULL; 645 else 646 outp = videobuf_to_vmalloc(&buf->vb); 647 } 648 if (buf != NULL) { 649 if (dev->cur_field & 1) 650 buf->top_field = 0; 651 else 652 buf->top_field = 1; 653 } 654 655 dma_q->pos = 0; 656 } 657 658 if (buf != NULL && dev->capture_type == 2) { 659 if (len >= 4 && p[0] == 0x88 && p[1] == 0x88 && 660 p[2] == 0x88 && p[3] == 0x88) { 661 p += 4; 662 len -= 4; 663 } 664 if (len >= 4 && p[0] == 0x22 && p[1] == 0x5a) { 665 em28xx_isocdbg("Video frame %d, len=%i, %s\n", 666 p[2], len, (p[2] & 1) ? 667 "odd" : "even"); 668 p += 4; 669 len -= 4; 670 } 671 672 if (len > 0) 673 em28xx_copy_video(dev, dma_q, buf, p, outp, 674 len); 675 } 676 } 677 return rc; 678} 679 680 681/* ------------------------------------------------------------------ 682 Videobuf operations 683 ------------------------------------------------------------------*/ 684 685static int 686buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size) 687{ 688 struct em28xx_fh *fh = vq->priv_data; 689 struct em28xx *dev = fh->dev; 690 struct v4l2_frequency f; 691 692 *size = (fh->dev->width * fh->dev->height * dev->format->depth + 7) 693 >> 3; 694 695 if (0 == *count) 696 *count = EM28XX_DEF_BUF; 697 698 if (*count < EM28XX_MIN_BUF) 699 *count = EM28XX_MIN_BUF; 700 701 /* Ask tuner to go to analog or radio mode */ 702 memset(&f, 0, sizeof(f)); 703 f.frequency = dev->ctl_freq; 704 f.type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 705 706 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f); 707 708 return 0; 709} 710 711/* This is called *without* dev->slock held; please keep it that way */ 712static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf) 713{ 714 struct em28xx_fh *fh = vq->priv_data; 715 struct em28xx *dev = fh->dev; 716 unsigned long flags = 0; 717 if (in_interrupt()) 718 BUG(); 719 720 /* We used to wait for the buffer to finish here, but this didn't work 721 because, as we were keeping the state as VIDEOBUF_QUEUED, 722 videobuf_queue_cancel marked it as finished for us. 723 (Also, it could wedge forever if the hardware was misconfigured.) 724 725 This should be safe; by the time we get here, the buffer isn't 726 queued anymore. If we ever start marking the buffers as 727 VIDEOBUF_ACTIVE, it won't be, though. 728 */ 729 spin_lock_irqsave(&dev->slock, flags); 730 if (dev->isoc_ctl.vid_buf == buf) 731 dev->isoc_ctl.vid_buf = NULL; 732 spin_unlock_irqrestore(&dev->slock, flags); 733 734 videobuf_vmalloc_free(&buf->vb); 735 buf->vb.state = VIDEOBUF_NEEDS_INIT; 736} 737 738static int 739buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, 740 enum v4l2_field field) 741{ 742 struct em28xx_fh *fh = vq->priv_data; 743 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); 744 struct em28xx *dev = fh->dev; 745 int rc = 0, urb_init = 0; 746 747 buf->vb.size = (fh->dev->width * fh->dev->height * dev->format->depth 748 + 7) >> 3; 749 750 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size) 751 return -EINVAL; 752 753 buf->vb.width = dev->width; 754 buf->vb.height = dev->height; 755 buf->vb.field = field; 756 757 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { 758 rc = videobuf_iolock(vq, &buf->vb, NULL); 759 if (rc < 0) 760 goto fail; 761 } 762 763 if (!dev->isoc_ctl.analog_bufs.num_bufs) 764 urb_init = 1; 765 766 if (urb_init) { 767 if (em28xx_vbi_supported(dev) == 1) 768 rc = em28xx_init_isoc(dev, EM28XX_ANALOG_MODE, 769 EM28XX_NUM_PACKETS, 770 EM28XX_NUM_BUFS, 771 dev->max_pkt_size, 772 em28xx_isoc_copy_vbi); 773 else 774 rc = em28xx_init_isoc(dev, EM28XX_ANALOG_MODE, 775 EM28XX_NUM_PACKETS, 776 EM28XX_NUM_BUFS, 777 dev->max_pkt_size, 778 em28xx_isoc_copy); 779 if (rc < 0) 780 goto fail; 781 } 782 783 buf->vb.state = VIDEOBUF_PREPARED; 784 return 0; 785 786fail: 787 free_buffer(vq, buf); 788 return rc; 789} 790 791static void 792buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) 793{ 794 struct em28xx_buffer *buf = container_of(vb, 795 struct em28xx_buffer, 796 vb); 797 struct em28xx_fh *fh = vq->priv_data; 798 struct em28xx *dev = fh->dev; 799 struct em28xx_dmaqueue *vidq = &dev->vidq; 800 801 buf->vb.state = VIDEOBUF_QUEUED; 802 list_add_tail(&buf->vb.queue, &vidq->active); 803 804} 805 806static void buffer_release(struct videobuf_queue *vq, 807 struct videobuf_buffer *vb) 808{ 809 struct em28xx_buffer *buf = container_of(vb, 810 struct em28xx_buffer, 811 vb); 812 struct em28xx_fh *fh = vq->priv_data; 813 struct em28xx *dev = (struct em28xx *)fh->dev; 814 815 em28xx_isocdbg("em28xx: called buffer_release\n"); 816 817 free_buffer(vq, buf); 818} 819 820static struct videobuf_queue_ops em28xx_video_qops = { 821 .buf_setup = buffer_setup, 822 .buf_prepare = buffer_prepare, 823 .buf_queue = buffer_queue, 824 .buf_release = buffer_release, 825}; 826 827/********************* v4l2 interface **************************************/ 828 829static void video_mux(struct em28xx *dev, int index) 830{ 831 dev->ctl_input = index; 832 dev->ctl_ainput = INPUT(index)->amux; 833 dev->ctl_aoutput = INPUT(index)->aout; 834 835 if (!dev->ctl_aoutput) 836 dev->ctl_aoutput = EM28XX_AOUT_MASTER; 837 838 v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing, 839 INPUT(index)->vmux, 0, 0); 840 841 if (dev->board.has_msp34xx) { 842 if (dev->i2s_speed) { 843 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, 844 s_i2s_clock_freq, dev->i2s_speed); 845 } 846 /* Note: this is msp3400 specific */ 847 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing, 848 dev->ctl_ainput, MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0); 849 } 850 851 if (dev->board.adecoder != EM28XX_NOADECODER) { 852 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing, 853 dev->ctl_ainput, dev->ctl_aoutput, 0); 854 } 855 856 em28xx_audio_analog_set(dev); 857} 858 859/* Usage lock check functions */ 860static int res_get(struct em28xx_fh *fh, unsigned int bit) 861{ 862 struct em28xx *dev = fh->dev; 863 864 if (fh->resources & bit) 865 /* have it already allocated */ 866 return 1; 867 868 /* is it free? */ 869 if (dev->resources & bit) { 870 /* no, someone else uses it */ 871 return 0; 872 } 873 /* it's free, grab it */ 874 fh->resources |= bit; 875 dev->resources |= bit; 876 em28xx_videodbg("res: get %d\n", bit); 877 return 1; 878} 879 880static int res_check(struct em28xx_fh *fh, unsigned int bit) 881{ 882 return fh->resources & bit; 883} 884 885static int res_locked(struct em28xx *dev, unsigned int bit) 886{ 887 return dev->resources & bit; 888} 889 890static void res_free(struct em28xx_fh *fh, unsigned int bits) 891{ 892 struct em28xx *dev = fh->dev; 893 894 BUG_ON((fh->resources & bits) != bits); 895 896 fh->resources &= ~bits; 897 dev->resources &= ~bits; 898 em28xx_videodbg("res: put %d\n", bits); 899} 900 901static int get_ressource(struct em28xx_fh *fh) 902{ 903 switch (fh->type) { 904 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 905 return EM28XX_RESOURCE_VIDEO; 906 case V4L2_BUF_TYPE_VBI_CAPTURE: 907 return EM28XX_RESOURCE_VBI; 908 default: 909 BUG(); 910 return 0; 911 } 912} 913 914/* 915 * ac97_queryctrl() 916 * return the ac97 supported controls 917 */ 918static int ac97_queryctrl(struct v4l2_queryctrl *qc) 919{ 920 int i; 921 922 for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) { 923 if (qc->id && qc->id == ac97_qctrl[i].id) { 924 memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc)); 925 return 0; 926 } 927 } 928 929 /* Control is not ac97 related */ 930 return 1; 931} 932 933/* 934 * ac97_get_ctrl() 935 * return the current values for ac97 mute and volume 936 */ 937static int ac97_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl) 938{ 939 switch (ctrl->id) { 940 case V4L2_CID_AUDIO_MUTE: 941 ctrl->value = dev->mute; 942 return 0; 943 case V4L2_CID_AUDIO_VOLUME: 944 ctrl->value = dev->volume; 945 return 0; 946 default: 947 /* Control is not ac97 related */ 948 return 1; 949 } 950} 951 952/* 953 * ac97_set_ctrl() 954 * set values for ac97 mute and volume 955 */ 956static int ac97_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl) 957{ 958 int i; 959 960 for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) 961 if (ctrl->id == ac97_qctrl[i].id) 962 goto handle; 963 964 /* Announce that hasn't handle it */ 965 return 1; 966 967handle: 968 if (ctrl->value < ac97_qctrl[i].minimum || 969 ctrl->value > ac97_qctrl[i].maximum) 970 return -ERANGE; 971 972 switch (ctrl->id) { 973 case V4L2_CID_AUDIO_MUTE: 974 dev->mute = ctrl->value; 975 break; 976 case V4L2_CID_AUDIO_VOLUME: 977 dev->volume = ctrl->value; 978 break; 979 } 980 981 return em28xx_audio_analog_set(dev); 982} 983 984static int check_dev(struct em28xx *dev) 985{ 986 if (dev->state & DEV_DISCONNECTED) { 987 em28xx_errdev("v4l2 ioctl: device not present\n"); 988 return -ENODEV; 989 } 990 991 if (dev->state & DEV_MISCONFIGURED) { 992 em28xx_errdev("v4l2 ioctl: device is misconfigured; " 993 "close and open it again\n"); 994 return -EIO; 995 } 996 return 0; 997} 998 999static void get_scale(struct em28xx *dev, 1000 unsigned int width, unsigned int height, 1001 unsigned int *hscale, unsigned int *vscale) 1002{ 1003 unsigned int maxw = norm_maxw(dev); 1004 unsigned int maxh = norm_maxh(dev); 1005 1006 *hscale = (((unsigned long)maxw) << 12) / width - 4096L; 1007 if (*hscale >= 0x4000) 1008 *hscale = 0x3fff; 1009 1010 *vscale = (((unsigned long)maxh) << 12) / height - 4096L; 1011 if (*vscale >= 0x4000) 1012 *vscale = 0x3fff; 1013} 1014 1015/* ------------------------------------------------------------------ 1016 IOCTL vidioc handling 1017 ------------------------------------------------------------------*/ 1018 1019static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 1020 struct v4l2_format *f) 1021{ 1022 struct em28xx_fh *fh = priv; 1023 struct em28xx *dev = fh->dev; 1024 1025 f->fmt.pix.width = dev->width; 1026 f->fmt.pix.height = dev->height; 1027 f->fmt.pix.pixelformat = dev->format->fourcc; 1028 f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3; 1029 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * dev->height; 1030 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 1031 1032 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */ 1033 if (dev->progressive) 1034 f->fmt.pix.field = V4L2_FIELD_NONE; 1035 else 1036 f->fmt.pix.field = dev->interlaced ? 1037 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; 1038 return 0; 1039} 1040 1041static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc) 1042{ 1043 unsigned int i; 1044 1045 for (i = 0; i < ARRAY_SIZE(format); i++) 1046 if (format[i].fourcc == fourcc) 1047 return &format[i]; 1048 1049 return NULL; 1050} 1051 1052static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 1053 struct v4l2_format *f) 1054{ 1055 struct em28xx_fh *fh = priv; 1056 struct em28xx *dev = fh->dev; 1057 unsigned int width = f->fmt.pix.width; 1058 unsigned int height = f->fmt.pix.height; 1059 unsigned int maxw = norm_maxw(dev); 1060 unsigned int maxh = norm_maxh(dev); 1061 unsigned int hscale, vscale; 1062 struct em28xx_fmt *fmt; 1063 1064 fmt = format_by_fourcc(f->fmt.pix.pixelformat); 1065 if (!fmt) { 1066 em28xx_videodbg("Fourcc format (%08x) invalid.\n", 1067 f->fmt.pix.pixelformat); 1068 return -EINVAL; 1069 } 1070 1071 if (dev->board.is_em2800) { 1072 /* the em2800 can only scale down to 50% */ 1073 height = height > (3 * maxh / 4) ? maxh : maxh / 2; 1074 width = width > (3 * maxw / 4) ? maxw : maxw / 2; 1075 /* MaxPacketSize for em2800 is too small to capture at full resolution 1076 * use half of maxw as the scaler can only scale to 50% */ 1077 if (width == maxw && height == maxh) 1078 width /= 2; 1079 } else { 1080 /* width must even because of the YUYV format 1081 height must be even because of interlacing */ 1082 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh, 1083 1, 0); 1084 } 1085 1086 get_scale(dev, width, height, &hscale, &vscale); 1087 1088 width = (((unsigned long)maxw) << 12) / (hscale + 4096L); 1089 height = (((unsigned long)maxh) << 12) / (vscale + 4096L); 1090 1091 f->fmt.pix.width = width; 1092 f->fmt.pix.height = height; 1093 f->fmt.pix.pixelformat = fmt->fourcc; 1094 f->fmt.pix.bytesperline = (dev->width * fmt->depth + 7) >> 3; 1095 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height; 1096 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 1097 if (dev->progressive) 1098 f->fmt.pix.field = V4L2_FIELD_NONE; 1099 else 1100 f->fmt.pix.field = dev->interlaced ? 1101 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; 1102 1103 return 0; 1104} 1105 1106static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc, 1107 unsigned width, unsigned height) 1108{ 1109 struct em28xx_fmt *fmt; 1110 1111 fmt = format_by_fourcc(fourcc); 1112 if (!fmt) 1113 return -EINVAL; 1114 1115 dev->format = fmt; 1116 dev->width = width; 1117 dev->height = height; 1118 1119 /* set new image size */ 1120 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale); 1121 1122 em28xx_set_alternate(dev); 1123 em28xx_resolution_set(dev); 1124 1125 return 0; 1126} 1127 1128static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 1129 struct v4l2_format *f) 1130{ 1131 struct em28xx_fh *fh = priv; 1132 struct em28xx *dev = fh->dev; 1133 int rc; 1134 1135 rc = check_dev(dev); 1136 if (rc < 0) 1137 return rc; 1138 1139 vidioc_try_fmt_vid_cap(file, priv, f); 1140 1141 if (videobuf_queue_is_busy(&fh->vb_vidq)) { 1142 em28xx_errdev("%s queue busy\n", __func__); 1143 return -EBUSY; 1144 } 1145 1146 return em28xx_set_video_format(dev, f->fmt.pix.pixelformat, 1147 f->fmt.pix.width, f->fmt.pix.height); 1148} 1149 1150static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm) 1151{ 1152 struct em28xx_fh *fh = priv; 1153 struct em28xx *dev = fh->dev; 1154 int rc; 1155 1156 rc = check_dev(dev); 1157 if (rc < 0) 1158 return rc; 1159 1160 *norm = dev->norm; 1161 1162 return 0; 1163} 1164 1165static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm) 1166{ 1167 struct em28xx_fh *fh = priv; 1168 struct em28xx *dev = fh->dev; 1169 int rc; 1170 1171 rc = check_dev(dev); 1172 if (rc < 0) 1173 return rc; 1174 1175 v4l2_device_call_all(&dev->v4l2_dev, 0, video, querystd, norm); 1176 1177 return 0; 1178} 1179 1180static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm) 1181{ 1182 struct em28xx_fh *fh = priv; 1183 struct em28xx *dev = fh->dev; 1184 struct v4l2_format f; 1185 int rc; 1186 1187 rc = check_dev(dev); 1188 if (rc < 0) 1189 return rc; 1190 1191 dev->norm = *norm; 1192 1193 /* Adjusts width/height, if needed */ 1194 f.fmt.pix.width = dev->width; 1195 f.fmt.pix.height = dev->height; 1196 vidioc_try_fmt_vid_cap(file, priv, &f); 1197 1198 /* set new image size */ 1199 dev->width = f.fmt.pix.width; 1200 dev->height = f.fmt.pix.height; 1201 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale); 1202 1203 em28xx_resolution_set(dev); 1204 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm); 1205 1206 return 0; 1207} 1208 1209static int vidioc_g_parm(struct file *file, void *priv, 1210 struct v4l2_streamparm *p) 1211{ 1212 struct em28xx_fh *fh = priv; 1213 struct em28xx *dev = fh->dev; 1214 int rc = 0; 1215 1216 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 1217 return -EINVAL; 1218 1219 if (dev->board.is_webcam) 1220 rc = v4l2_device_call_until_err(&dev->v4l2_dev, 0, 1221 video, g_parm, p); 1222 else 1223 v4l2_video_std_frame_period(dev->norm, 1224 &p->parm.capture.timeperframe); 1225 1226 return rc; 1227} 1228 1229static int vidioc_s_parm(struct file *file, void *priv, 1230 struct v4l2_streamparm *p) 1231{ 1232 struct em28xx_fh *fh = priv; 1233 struct em28xx *dev = fh->dev; 1234 1235 if (!dev->board.is_webcam) 1236 return -EINVAL; 1237 1238 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 1239 return -EINVAL; 1240 1241 return v4l2_device_call_until_err(&dev->v4l2_dev, 0, video, s_parm, p); 1242} 1243 1244static const char *iname[] = { 1245 [EM28XX_VMUX_COMPOSITE1] = "Composite1", 1246 [EM28XX_VMUX_COMPOSITE2] = "Composite2", 1247 [EM28XX_VMUX_COMPOSITE3] = "Composite3", 1248 [EM28XX_VMUX_COMPOSITE4] = "Composite4", 1249 [EM28XX_VMUX_SVIDEO] = "S-Video", 1250 [EM28XX_VMUX_TELEVISION] = "Television", 1251 [EM28XX_VMUX_CABLE] = "Cable TV", 1252 [EM28XX_VMUX_DVB] = "DVB", 1253 [EM28XX_VMUX_DEBUG] = "for debug only", 1254}; 1255 1256static int vidioc_enum_input(struct file *file, void *priv, 1257 struct v4l2_input *i) 1258{ 1259 struct em28xx_fh *fh = priv; 1260 struct em28xx *dev = fh->dev; 1261 unsigned int n; 1262 1263 n = i->index; 1264 if (n >= MAX_EM28XX_INPUT) 1265 return -EINVAL; 1266 if (0 == INPUT(n)->type) 1267 return -EINVAL; 1268 1269 i->index = n; 1270 i->type = V4L2_INPUT_TYPE_CAMERA; 1271 1272 strcpy(i->name, iname[INPUT(n)->type]); 1273 1274 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) || 1275 (EM28XX_VMUX_CABLE == INPUT(n)->type)) 1276 i->type = V4L2_INPUT_TYPE_TUNER; 1277 1278 i->std = dev->vdev->tvnorms; 1279 1280 return 0; 1281} 1282 1283static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 1284{ 1285 struct em28xx_fh *fh = priv; 1286 struct em28xx *dev = fh->dev; 1287 1288 *i = dev->ctl_input; 1289 1290 return 0; 1291} 1292 1293static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 1294{ 1295 struct em28xx_fh *fh = priv; 1296 struct em28xx *dev = fh->dev; 1297 int rc; 1298 1299 rc = check_dev(dev); 1300 if (rc < 0) 1301 return rc; 1302 1303 if (i >= MAX_EM28XX_INPUT) 1304 return -EINVAL; 1305 if (0 == INPUT(i)->type) 1306 return -EINVAL; 1307 1308 dev->ctl_input = i; 1309 1310 video_mux(dev, dev->ctl_input); 1311 return 0; 1312} 1313 1314static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a) 1315{ 1316 struct em28xx_fh *fh = priv; 1317 struct em28xx *dev = fh->dev; 1318 1319 if (!dev->audio_mode.has_audio) 1320 return -EINVAL; 1321 1322 switch (a->index) { 1323 case EM28XX_AMUX_VIDEO: 1324 strcpy(a->name, "Television"); 1325 break; 1326 case EM28XX_AMUX_LINE_IN: 1327 strcpy(a->name, "Line In"); 1328 break; 1329 case EM28XX_AMUX_VIDEO2: 1330 strcpy(a->name, "Television alt"); 1331 break; 1332 case EM28XX_AMUX_PHONE: 1333 strcpy(a->name, "Phone"); 1334 break; 1335 case EM28XX_AMUX_MIC: 1336 strcpy(a->name, "Mic"); 1337 break; 1338 case EM28XX_AMUX_CD: 1339 strcpy(a->name, "CD"); 1340 break; 1341 case EM28XX_AMUX_AUX: 1342 strcpy(a->name, "Aux"); 1343 break; 1344 case EM28XX_AMUX_PCM_OUT: 1345 strcpy(a->name, "PCM"); 1346 break; 1347 default: 1348 return -EINVAL; 1349 } 1350 1351 a->index = dev->ctl_ainput; 1352 a->capability = V4L2_AUDCAP_STEREO; 1353 1354 return 0; 1355} 1356 1357static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a) 1358{ 1359 struct em28xx_fh *fh = priv; 1360 struct em28xx *dev = fh->dev; 1361 1362 1363 if (!dev->audio_mode.has_audio) 1364 return -EINVAL; 1365 1366 if (a->index >= MAX_EM28XX_INPUT) 1367 return -EINVAL; 1368 if (0 == INPUT(a->index)->type) 1369 return -EINVAL; 1370 1371 dev->ctl_ainput = INPUT(a->index)->amux; 1372 dev->ctl_aoutput = INPUT(a->index)->aout; 1373 1374 if (!dev->ctl_aoutput) 1375 dev->ctl_aoutput = EM28XX_AOUT_MASTER; 1376 1377 return 0; 1378} 1379 1380static int vidioc_queryctrl(struct file *file, void *priv, 1381 struct v4l2_queryctrl *qc) 1382{ 1383 struct em28xx_fh *fh = priv; 1384 struct em28xx *dev = fh->dev; 1385 int id = qc->id; 1386 int rc; 1387 1388 rc = check_dev(dev); 1389 if (rc < 0) 1390 return rc; 1391 1392 memset(qc, 0, sizeof(*qc)); 1393 1394 qc->id = id; 1395 1396 /* enumerate AC97 controls */ 1397 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) { 1398 rc = ac97_queryctrl(qc); 1399 if (!rc) 1400 return 0; 1401 } 1402 1403 /* enumerate V4L2 device controls */ 1404 v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, qc); 1405 1406 if (qc->type) 1407 return 0; 1408 else 1409 return -EINVAL; 1410} 1411 1412/* 1413 * FIXME: This is an indirect way to check if a control exists at a 1414 * subdev. Instead of that hack, maybe the better would be to change all 1415 * subdevs to return -ENOIOCTLCMD, if an ioctl is not supported. 1416 */ 1417static int check_subdev_ctrl(struct em28xx *dev, int id) 1418{ 1419 struct v4l2_queryctrl qc; 1420 1421 memset(&qc, 0, sizeof(qc)); 1422 qc.id = id; 1423 1424 /* enumerate V4L2 device controls */ 1425 v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, &qc); 1426 1427 if (qc.type) 1428 return 0; 1429 else 1430 return -EINVAL; 1431} 1432 1433static int vidioc_g_ctrl(struct file *file, void *priv, 1434 struct v4l2_control *ctrl) 1435{ 1436 struct em28xx_fh *fh = priv; 1437 struct em28xx *dev = fh->dev; 1438 int rc; 1439 1440 rc = check_dev(dev); 1441 if (rc < 0) 1442 return rc; 1443 rc = 0; 1444 1445 /* Set an AC97 control */ 1446 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) 1447 rc = ac97_get_ctrl(dev, ctrl); 1448 else 1449 rc = 1; 1450 1451 /* It were not an AC97 control. Sends it to the v4l2 dev interface */ 1452 if (rc == 1) { 1453 if (check_subdev_ctrl(dev, ctrl->id)) 1454 return -EINVAL; 1455 1456 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_ctrl, ctrl); 1457 rc = 0; 1458 } 1459 1460 return rc; 1461} 1462 1463static int vidioc_s_ctrl(struct file *file, void *priv, 1464 struct v4l2_control *ctrl) 1465{ 1466 struct em28xx_fh *fh = priv; 1467 struct em28xx *dev = fh->dev; 1468 int rc; 1469 1470 rc = check_dev(dev); 1471 if (rc < 0) 1472 return rc; 1473 1474 /* Set an AC97 control */ 1475 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) 1476 rc = ac97_set_ctrl(dev, ctrl); 1477 else 1478 rc = 1; 1479 1480 /* It isn't an AC97 control. Sends it to the v4l2 dev interface */ 1481 if (rc == 1) { 1482 rc = check_subdev_ctrl(dev, ctrl->id); 1483 if (!rc) 1484 v4l2_device_call_all(&dev->v4l2_dev, 0, 1485 core, s_ctrl, ctrl); 1486 /* 1487 * In the case of non-AC97 volume controls, we still need 1488 * to do some setups at em28xx, in order to mute/unmute 1489 * and to adjust audio volume. However, the value ranges 1490 * should be checked by the corresponding V4L subdriver. 1491 */ 1492 switch (ctrl->id) { 1493 case V4L2_CID_AUDIO_MUTE: 1494 dev->mute = ctrl->value; 1495 rc = em28xx_audio_analog_set(dev); 1496 break; 1497 case V4L2_CID_AUDIO_VOLUME: 1498 dev->volume = ctrl->value; 1499 rc = em28xx_audio_analog_set(dev); 1500 } 1501 } 1502 return (rc < 0) ? rc : 0; 1503} 1504 1505static int vidioc_g_tuner(struct file *file, void *priv, 1506 struct v4l2_tuner *t) 1507{ 1508 struct em28xx_fh *fh = priv; 1509 struct em28xx *dev = fh->dev; 1510 int rc; 1511 1512 rc = check_dev(dev); 1513 if (rc < 0) 1514 return rc; 1515 1516 if (0 != t->index) 1517 return -EINVAL; 1518 1519 strcpy(t->name, "Tuner"); 1520 t->type = V4L2_TUNER_ANALOG_TV; 1521 1522 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t); 1523 return 0; 1524} 1525 1526static int vidioc_s_tuner(struct file *file, void *priv, 1527 struct v4l2_tuner *t) 1528{ 1529 struct em28xx_fh *fh = priv; 1530 struct em28xx *dev = fh->dev; 1531 int rc; 1532 1533 rc = check_dev(dev); 1534 if (rc < 0) 1535 return rc; 1536 1537 if (0 != t->index) 1538 return -EINVAL; 1539 1540 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t); 1541 return 0; 1542} 1543 1544static int vidioc_g_frequency(struct file *file, void *priv, 1545 struct v4l2_frequency *f) 1546{ 1547 struct em28xx_fh *fh = priv; 1548 struct em28xx *dev = fh->dev; 1549 1550 f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1551 f->frequency = dev->ctl_freq; 1552 return 0; 1553} 1554 1555static int vidioc_s_frequency(struct file *file, void *priv, 1556 struct v4l2_frequency *f) 1557{ 1558 struct em28xx_fh *fh = priv; 1559 struct em28xx *dev = fh->dev; 1560 int rc; 1561 1562 rc = check_dev(dev); 1563 if (rc < 0) 1564 return rc; 1565 1566 if (0 != f->tuner) 1567 return -EINVAL; 1568 1569 if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV)) 1570 return -EINVAL; 1571 if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO)) 1572 return -EINVAL; 1573 1574 dev->ctl_freq = f->frequency; 1575 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f); 1576 1577 return 0; 1578} 1579 1580#ifdef CONFIG_VIDEO_ADV_DEBUG 1581static int em28xx_reg_len(int reg) 1582{ 1583 switch (reg) { 1584 case EM28XX_R40_AC97LSB: 1585 case EM28XX_R30_HSCALELOW: 1586 case EM28XX_R32_VSCALELOW: 1587 return 2; 1588 default: 1589 return 1; 1590 } 1591} 1592 1593static int vidioc_g_chip_ident(struct file *file, void *priv, 1594 struct v4l2_dbg_chip_ident *chip) 1595{ 1596 struct em28xx_fh *fh = priv; 1597 struct em28xx *dev = fh->dev; 1598 1599 chip->ident = V4L2_IDENT_NONE; 1600 chip->revision = 0; 1601 1602 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_chip_ident, chip); 1603 1604 return 0; 1605} 1606 1607 1608static int vidioc_g_register(struct file *file, void *priv, 1609 struct v4l2_dbg_register *reg) 1610{ 1611 struct em28xx_fh *fh = priv; 1612 struct em28xx *dev = fh->dev; 1613 int ret; 1614 1615 switch (reg->match.type) { 1616 case V4L2_CHIP_MATCH_AC97: 1617 ret = em28xx_read_ac97(dev, reg->reg); 1618 if (ret < 0) 1619 return ret; 1620 1621 reg->val = ret; 1622 reg->size = 1; 1623 return 0; 1624 case V4L2_CHIP_MATCH_I2C_DRIVER: 1625 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg); 1626 return 0; 1627 case V4L2_CHIP_MATCH_I2C_ADDR: 1628 /* TODO: is this correct? */ 1629 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg); 1630 return 0; 1631 default: 1632 if (!v4l2_chip_match_host(®->match)) 1633 return -EINVAL; 1634 } 1635 1636 /* Match host */ 1637 reg->size = em28xx_reg_len(reg->reg); 1638 if (reg->size == 1) { 1639 ret = em28xx_read_reg(dev, reg->reg); 1640 1641 if (ret < 0) 1642 return ret; 1643 1644 reg->val = ret; 1645 } else { 1646 __le16 val = 0; 1647 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS, 1648 reg->reg, (char *)&val, 2); 1649 if (ret < 0) 1650 return ret; 1651 1652 reg->val = le16_to_cpu(val); 1653 } 1654 1655 return 0; 1656} 1657 1658static int vidioc_s_register(struct file *file, void *priv, 1659 struct v4l2_dbg_register *reg) 1660{ 1661 struct em28xx_fh *fh = priv; 1662 struct em28xx *dev = fh->dev; 1663 __le16 buf; 1664 1665 switch (reg->match.type) { 1666 case V4L2_CHIP_MATCH_AC97: 1667 return em28xx_write_ac97(dev, reg->reg, reg->val); 1668 case V4L2_CHIP_MATCH_I2C_DRIVER: 1669 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg); 1670 return 0; 1671 case V4L2_CHIP_MATCH_I2C_ADDR: 1672 /* TODO: is this correct? */ 1673 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg); 1674 return 0; 1675 default: 1676 if (!v4l2_chip_match_host(®->match)) 1677 return -EINVAL; 1678 } 1679 1680 /* Match host */ 1681 buf = cpu_to_le16(reg->val); 1682 1683 return em28xx_write_regs(dev, reg->reg, (char *)&buf, 1684 em28xx_reg_len(reg->reg)); 1685} 1686#endif 1687 1688 1689static int vidioc_cropcap(struct file *file, void *priv, 1690 struct v4l2_cropcap *cc) 1691{ 1692 struct em28xx_fh *fh = priv; 1693 struct em28xx *dev = fh->dev; 1694 1695 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 1696 return -EINVAL; 1697 1698 cc->bounds.left = 0; 1699 cc->bounds.top = 0; 1700 cc->bounds.width = dev->width; 1701 cc->bounds.height = dev->height; 1702 cc->defrect = cc->bounds; 1703 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */ 1704 cc->pixelaspect.denominator = 59; 1705 1706 return 0; 1707} 1708 1709static int vidioc_streamon(struct file *file, void *priv, 1710 enum v4l2_buf_type type) 1711{ 1712 struct em28xx_fh *fh = priv; 1713 struct em28xx *dev = fh->dev; 1714 int rc = -EINVAL; 1715 1716 rc = check_dev(dev); 1717 if (rc < 0) 1718 return rc; 1719 1720 if (unlikely(type != fh->type)) 1721 return -EINVAL; 1722 1723 em28xx_videodbg("vidioc_streamon fh=%p t=%d fh->res=%d dev->res=%d\n", 1724 fh, type, fh->resources, dev->resources); 1725 1726 if (unlikely(!res_get(fh, get_ressource(fh)))) 1727 return -EBUSY; 1728 1729 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 1730 rc = videobuf_streamon(&fh->vb_vidq); 1731 else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) 1732 rc = videobuf_streamon(&fh->vb_vbiq); 1733 1734 return rc; 1735} 1736 1737static int vidioc_streamoff(struct file *file, void *priv, 1738 enum v4l2_buf_type type) 1739{ 1740 struct em28xx_fh *fh = priv; 1741 struct em28xx *dev = fh->dev; 1742 int rc; 1743 1744 rc = check_dev(dev); 1745 if (rc < 0) 1746 return rc; 1747 1748 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1749 fh->type != V4L2_BUF_TYPE_VBI_CAPTURE) 1750 return -EINVAL; 1751 if (type != fh->type) 1752 return -EINVAL; 1753 1754 em28xx_videodbg("vidioc_streamoff fh=%p t=%d fh->res=%d dev->res=%d\n", 1755 fh, type, fh->resources, dev->resources); 1756 1757 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { 1758 if (res_check(fh, EM28XX_RESOURCE_VIDEO)) { 1759 videobuf_streamoff(&fh->vb_vidq); 1760 res_free(fh, EM28XX_RESOURCE_VIDEO); 1761 } 1762 } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) { 1763 if (res_check(fh, EM28XX_RESOURCE_VBI)) { 1764 videobuf_streamoff(&fh->vb_vbiq); 1765 res_free(fh, EM28XX_RESOURCE_VBI); 1766 } 1767 } 1768 1769 return 0; 1770} 1771 1772static int vidioc_querycap(struct file *file, void *priv, 1773 struct v4l2_capability *cap) 1774{ 1775 struct em28xx_fh *fh = priv; 1776 struct em28xx *dev = fh->dev; 1777 1778 strlcpy(cap->driver, "em28xx", sizeof(cap->driver)); 1779 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card)); 1780 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); 1781 1782 cap->capabilities = 1783 V4L2_CAP_SLICED_VBI_CAPTURE | 1784 V4L2_CAP_VIDEO_CAPTURE | 1785 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; 1786 1787 if (dev->vbi_dev) 1788 cap->capabilities |= V4L2_CAP_VBI_CAPTURE; 1789 1790 if (dev->audio_mode.has_audio) 1791 cap->capabilities |= V4L2_CAP_AUDIO; 1792 1793 if (dev->tuner_type != TUNER_ABSENT) 1794 cap->capabilities |= V4L2_CAP_TUNER; 1795 1796 return 0; 1797} 1798 1799static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 1800 struct v4l2_fmtdesc *f) 1801{ 1802 if (unlikely(f->index >= ARRAY_SIZE(format))) 1803 return -EINVAL; 1804 1805 strlcpy(f->description, format[f->index].name, sizeof(f->description)); 1806 f->pixelformat = format[f->index].fourcc; 1807 1808 return 0; 1809} 1810 1811static int vidioc_enum_framesizes(struct file *file, void *priv, 1812 struct v4l2_frmsizeenum *fsize) 1813{ 1814 struct em28xx_fh *fh = priv; 1815 struct em28xx *dev = fh->dev; 1816 struct em28xx_fmt *fmt; 1817 unsigned int maxw = norm_maxw(dev); 1818 unsigned int maxh = norm_maxh(dev); 1819 1820 fmt = format_by_fourcc(fsize->pixel_format); 1821 if (!fmt) { 1822 em28xx_videodbg("Fourcc format (%08x) invalid.\n", 1823 fsize->pixel_format); 1824 return -EINVAL; 1825 } 1826 1827 if (dev->board.is_em2800) { 1828 if (fsize->index > 1) 1829 return -EINVAL; 1830 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 1831 fsize->discrete.width = maxw / (1 + fsize->index); 1832 fsize->discrete.height = maxh / (1 + fsize->index); 1833 return 0; 1834 } 1835 1836 if (fsize->index != 0) 1837 return -EINVAL; 1838 1839 /* Report a continuous range */ 1840 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; 1841 fsize->stepwise.min_width = 48; 1842 fsize->stepwise.min_height = 32; 1843 fsize->stepwise.max_width = maxw; 1844 fsize->stepwise.max_height = maxh; 1845 fsize->stepwise.step_width = 1; 1846 fsize->stepwise.step_height = 1; 1847 return 0; 1848} 1849 1850/* Sliced VBI ioctls */ 1851static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv, 1852 struct v4l2_format *f) 1853{ 1854 struct em28xx_fh *fh = priv; 1855 struct em28xx *dev = fh->dev; 1856 int rc; 1857 1858 rc = check_dev(dev); 1859 if (rc < 0) 1860 return rc; 1861 1862 f->fmt.sliced.service_set = 0; 1863 v4l2_device_call_all(&dev->v4l2_dev, 0, vbi, g_sliced_fmt, &f->fmt.sliced); 1864 1865 if (f->fmt.sliced.service_set == 0) 1866 rc = -EINVAL; 1867 1868 return rc; 1869} 1870 1871static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv, 1872 struct v4l2_format *f) 1873{ 1874 struct em28xx_fh *fh = priv; 1875 struct em28xx *dev = fh->dev; 1876 int rc; 1877 1878 rc = check_dev(dev); 1879 if (rc < 0) 1880 return rc; 1881 1882 v4l2_device_call_all(&dev->v4l2_dev, 0, vbi, g_sliced_fmt, &f->fmt.sliced); 1883 1884 if (f->fmt.sliced.service_set == 0) 1885 return -EINVAL; 1886 1887 return 0; 1888} 1889 1890/* RAW VBI ioctls */ 1891 1892static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv, 1893 struct v4l2_format *format) 1894{ 1895 struct em28xx_fh *fh = priv; 1896 struct em28xx *dev = fh->dev; 1897 1898 format->fmt.vbi.samples_per_line = dev->vbi_width; 1899 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; 1900 format->fmt.vbi.offset = 0; 1901 format->fmt.vbi.flags = 0; 1902 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2; 1903 format->fmt.vbi.count[0] = dev->vbi_height; 1904 format->fmt.vbi.count[1] = dev->vbi_height; 1905 1906 /* Varies by video standard (NTSC, PAL, etc.) */ 1907 if (dev->norm & V4L2_STD_525_60) { 1908 /* NTSC */ 1909 format->fmt.vbi.start[0] = 10; 1910 format->fmt.vbi.start[1] = 273; 1911 } else if (dev->norm & V4L2_STD_625_50) { 1912 /* PAL */ 1913 format->fmt.vbi.start[0] = 6; 1914 format->fmt.vbi.start[1] = 318; 1915 } 1916 1917 return 0; 1918} 1919 1920static int vidioc_s_fmt_vbi_cap(struct file *file, void *priv, 1921 struct v4l2_format *format) 1922{ 1923 struct em28xx_fh *fh = priv; 1924 struct em28xx *dev = fh->dev; 1925 1926 format->fmt.vbi.samples_per_line = dev->vbi_width; 1927 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; 1928 format->fmt.vbi.offset = 0; 1929 format->fmt.vbi.flags = 0; 1930 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2; 1931 format->fmt.vbi.count[0] = dev->vbi_height; 1932 format->fmt.vbi.count[1] = dev->vbi_height; 1933 1934 /* Varies by video standard (NTSC, PAL, etc.) */ 1935 if (dev->norm & V4L2_STD_525_60) { 1936 /* NTSC */ 1937 format->fmt.vbi.start[0] = 10; 1938 format->fmt.vbi.start[1] = 273; 1939 } else if (dev->norm & V4L2_STD_625_50) { 1940 /* PAL */ 1941 format->fmt.vbi.start[0] = 6; 1942 format->fmt.vbi.start[1] = 318; 1943 } 1944 1945 return 0; 1946} 1947 1948static int vidioc_reqbufs(struct file *file, void *priv, 1949 struct v4l2_requestbuffers *rb) 1950{ 1951 struct em28xx_fh *fh = priv; 1952 struct em28xx *dev = fh->dev; 1953 int rc; 1954 1955 rc = check_dev(dev); 1956 if (rc < 0) 1957 return rc; 1958 1959 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 1960 return videobuf_reqbufs(&fh->vb_vidq, rb); 1961 else 1962 return videobuf_reqbufs(&fh->vb_vbiq, rb); 1963} 1964 1965static int vidioc_querybuf(struct file *file, void *priv, 1966 struct v4l2_buffer *b) 1967{ 1968 struct em28xx_fh *fh = priv; 1969 struct em28xx *dev = fh->dev; 1970 int rc; 1971 1972 rc = check_dev(dev); 1973 if (rc < 0) 1974 return rc; 1975 1976 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 1977 return videobuf_querybuf(&fh->vb_vidq, b); 1978 else { 1979 /* FIXME: I'm not sure yet whether this is a bug in zvbi or 1980 the videobuf framework, but we probably shouldn't be 1981 returning a buffer larger than that which was asked for. 1982 At a minimum, it causes a crash in zvbi since it does 1983 a memcpy based on the source buffer length */ 1984 int result = videobuf_querybuf(&fh->vb_vbiq, b); 1985 b->length = dev->vbi_width * dev->vbi_height * 2; 1986 1987 return result; 1988 } 1989} 1990 1991static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b) 1992{ 1993 struct em28xx_fh *fh = priv; 1994 struct em28xx *dev = fh->dev; 1995 int rc; 1996 1997 rc = check_dev(dev); 1998 if (rc < 0) 1999 return rc; 2000 2001 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 2002 return videobuf_qbuf(&fh->vb_vidq, b); 2003 else 2004 return videobuf_qbuf(&fh->vb_vbiq, b); 2005} 2006 2007static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b) 2008{ 2009 struct em28xx_fh *fh = priv; 2010 struct em28xx *dev = fh->dev; 2011 int rc; 2012 2013 rc = check_dev(dev); 2014 if (rc < 0) 2015 return rc; 2016 2017 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 2018 return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags & 2019 O_NONBLOCK); 2020 else 2021 return videobuf_dqbuf(&fh->vb_vbiq, b, file->f_flags & 2022 O_NONBLOCK); 2023} 2024 2025/* ----------------------------------------------------------- */ 2026/* RADIO ESPECIFIC IOCTLS */ 2027/* ----------------------------------------------------------- */ 2028 2029static int radio_querycap(struct file *file, void *priv, 2030 struct v4l2_capability *cap) 2031{ 2032 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev; 2033 2034 strlcpy(cap->driver, "em28xx", sizeof(cap->driver)); 2035 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card)); 2036 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); 2037 2038 cap->capabilities = V4L2_CAP_TUNER; 2039 return 0; 2040} 2041 2042static int radio_g_tuner(struct file *file, void *priv, 2043 struct v4l2_tuner *t) 2044{ 2045 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev; 2046 2047 if (unlikely(t->index > 0)) 2048 return -EINVAL; 2049 2050 strcpy(t->name, "Radio"); 2051 t->type = V4L2_TUNER_RADIO; 2052 2053 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t); 2054 2055 return 0; 2056} 2057 2058static int radio_enum_input(struct file *file, void *priv, 2059 struct v4l2_input *i) 2060{ 2061 if (i->index != 0) 2062 return -EINVAL; 2063 strcpy(i->name, "Radio"); 2064 i->type = V4L2_INPUT_TYPE_TUNER; 2065 2066 return 0; 2067} 2068 2069static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a) 2070{ 2071 if (unlikely(a->index)) 2072 return -EINVAL; 2073 2074 strcpy(a->name, "Radio"); 2075 return 0; 2076} 2077 2078static int radio_s_tuner(struct file *file, void *priv, 2079 struct v4l2_tuner *t) 2080{ 2081 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev; 2082 2083 if (0 != t->index) 2084 return -EINVAL; 2085 2086 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t); 2087 2088 return 0; 2089} 2090 2091static int radio_s_audio(struct file *file, void *fh, 2092 struct v4l2_audio *a) 2093{ 2094 return 0; 2095} 2096 2097static int radio_s_input(struct file *file, void *fh, unsigned int i) 2098{ 2099 return 0; 2100} 2101 2102static int radio_queryctrl(struct file *file, void *priv, 2103 struct v4l2_queryctrl *qc) 2104{ 2105 int i; 2106 2107 if (qc->id < V4L2_CID_BASE || 2108 qc->id >= V4L2_CID_LASTP1) 2109 return -EINVAL; 2110 2111 for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) { 2112 if (qc->id && qc->id == ac97_qctrl[i].id) { 2113 memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc)); 2114 return 0; 2115 } 2116 } 2117 2118 return -EINVAL; 2119} 2120 2121/* 2122 * em28xx_v4l2_open() 2123 * inits the device and starts isoc transfer 2124 */ 2125static int em28xx_v4l2_open(struct file *filp) 2126{ 2127 int errCode = 0, radio = 0; 2128 struct video_device *vdev = video_devdata(filp); 2129 struct em28xx *dev = video_drvdata(filp); 2130 enum v4l2_buf_type fh_type = 0; 2131 struct em28xx_fh *fh; 2132 enum v4l2_field field; 2133 2134 switch (vdev->vfl_type) { 2135 case VFL_TYPE_GRABBER: 2136 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2137 break; 2138 case VFL_TYPE_VBI: 2139 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE; 2140 break; 2141 case VFL_TYPE_RADIO: 2142 radio = 1; 2143 break; 2144 } 2145 2146 em28xx_videodbg("open dev=%s type=%s users=%d\n", 2147 video_device_node_name(vdev), v4l2_type_names[fh_type], 2148 dev->users); 2149 2150 2151 fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL); 2152 if (!fh) { 2153 em28xx_errdev("em28xx-video.c: Out of memory?!\n"); 2154 return -ENOMEM; 2155 } 2156 fh->dev = dev; 2157 fh->radio = radio; 2158 fh->type = fh_type; 2159 filp->private_data = fh; 2160 2161 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) { 2162 em28xx_set_mode(dev, EM28XX_ANALOG_MODE); 2163 em28xx_set_alternate(dev); 2164 em28xx_resolution_set(dev); 2165 2166 /* Needed, since GPIO might have disabled power of 2167 some i2c device 2168 */ 2169 em28xx_wake_i2c(dev); 2170 2171 } 2172 if (fh->radio) { 2173 em28xx_videodbg("video_open: setting radio device\n"); 2174 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_radio); 2175 } 2176 2177 dev->users++; 2178 2179 if (dev->progressive) 2180 field = V4L2_FIELD_NONE; 2181 else 2182 field = V4L2_FIELD_INTERLACED; 2183 2184 videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops, 2185 NULL, &dev->slock, 2186 V4L2_BUF_TYPE_VIDEO_CAPTURE, field, 2187 sizeof(struct em28xx_buffer), fh, &dev->lock); 2188 2189 videobuf_queue_vmalloc_init(&fh->vb_vbiq, &em28xx_vbi_qops, 2190 NULL, &dev->slock, 2191 V4L2_BUF_TYPE_VBI_CAPTURE, 2192 V4L2_FIELD_SEQ_TB, 2193 sizeof(struct em28xx_buffer), fh, &dev->lock); 2194 2195 return errCode; 2196} 2197 2198/* 2199 * em28xx_realease_resources() 2200 * unregisters the v4l2,i2c and usb devices 2201 * called when the device gets disconected or at module unload 2202*/ 2203void em28xx_release_analog_resources(struct em28xx *dev) 2204{ 2205 2206 /*FIXME: I2C IR should be disconnected */ 2207 2208 if (dev->radio_dev) { 2209 if (video_is_registered(dev->radio_dev)) 2210 video_unregister_device(dev->radio_dev); 2211 else 2212 video_device_release(dev->radio_dev); 2213 dev->radio_dev = NULL; 2214 } 2215 if (dev->vbi_dev) { 2216 em28xx_info("V4L2 device %s deregistered\n", 2217 video_device_node_name(dev->vbi_dev)); 2218 if (video_is_registered(dev->vbi_dev)) 2219 video_unregister_device(dev->vbi_dev); 2220 else 2221 video_device_release(dev->vbi_dev); 2222 dev->vbi_dev = NULL; 2223 } 2224 if (dev->vdev) { 2225 em28xx_info("V4L2 device %s deregistered\n", 2226 video_device_node_name(dev->vdev)); 2227 if (video_is_registered(dev->vdev)) 2228 video_unregister_device(dev->vdev); 2229 else 2230 video_device_release(dev->vdev); 2231 dev->vdev = NULL; 2232 } 2233} 2234 2235/* 2236 * em28xx_v4l2_close() 2237 * stops streaming and deallocates all resources allocated by the v4l2 2238 * calls and ioctls 2239 */ 2240static int em28xx_v4l2_close(struct file *filp) 2241{ 2242 struct em28xx_fh *fh = filp->private_data; 2243 struct em28xx *dev = fh->dev; 2244 int errCode; 2245 2246 em28xx_videodbg("users=%d\n", dev->users); 2247 2248 if (res_check(fh, EM28XX_RESOURCE_VIDEO)) { 2249 videobuf_stop(&fh->vb_vidq); 2250 res_free(fh, EM28XX_RESOURCE_VIDEO); 2251 } 2252 2253 if (res_check(fh, EM28XX_RESOURCE_VBI)) { 2254 videobuf_stop(&fh->vb_vbiq); 2255 res_free(fh, EM28XX_RESOURCE_VBI); 2256 } 2257 2258 if (dev->users == 1) { 2259 /* the device is already disconnect, 2260 free the remaining resources */ 2261 if (dev->state & DEV_DISCONNECTED) { 2262 em28xx_release_resources(dev); 2263 kfree(dev->alt_max_pkt_size); 2264 kfree(dev); 2265 return 0; 2266 } 2267 2268 /* Save some power by putting tuner to sleep */ 2269 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_power, 0); 2270 2271 /* do this before setting alternate! */ 2272 em28xx_uninit_isoc(dev, EM28XX_ANALOG_MODE); 2273 em28xx_set_mode(dev, EM28XX_SUSPEND); 2274 2275 /* set alternate 0 */ 2276 dev->alt = 0; 2277 em28xx_videodbg("setting alternate 0\n"); 2278 errCode = usb_set_interface(dev->udev, 0, 0); 2279 if (errCode < 0) { 2280 em28xx_errdev("cannot change alternate number to " 2281 "0 (error=%i)\n", errCode); 2282 } 2283 } 2284 2285 videobuf_mmap_free(&fh->vb_vidq); 2286 videobuf_mmap_free(&fh->vb_vbiq); 2287 kfree(fh); 2288 dev->users--; 2289 wake_up_interruptible_nr(&dev->open, 1); 2290 return 0; 2291} 2292 2293/* 2294 * em28xx_v4l2_read() 2295 * will allocate buffers when called for the first time 2296 */ 2297static ssize_t 2298em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count, 2299 loff_t *pos) 2300{ 2301 struct em28xx_fh *fh = filp->private_data; 2302 struct em28xx *dev = fh->dev; 2303 int rc; 2304 2305 rc = check_dev(dev); 2306 if (rc < 0) 2307 return rc; 2308 2309 /* FIXME: read() is not prepared to allow changing the video 2310 resolution while streaming. Seems a bug at em28xx_set_fmt 2311 */ 2312 2313 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { 2314 if (res_locked(dev, EM28XX_RESOURCE_VIDEO)) 2315 return -EBUSY; 2316 2317 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0, 2318 filp->f_flags & O_NONBLOCK); 2319 } 2320 2321 2322 if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) { 2323 if (!res_get(fh, EM28XX_RESOURCE_VBI)) 2324 return -EBUSY; 2325 2326 return videobuf_read_stream(&fh->vb_vbiq, buf, count, pos, 0, 2327 filp->f_flags & O_NONBLOCK); 2328 } 2329 2330 return 0; 2331} 2332 2333/* 2334 * em28xx_v4l2_poll() 2335 * will allocate buffers when called for the first time 2336 */ 2337static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table *wait) 2338{ 2339 struct em28xx_fh *fh = filp->private_data; 2340 struct em28xx *dev = fh->dev; 2341 int rc; 2342 2343 rc = check_dev(dev); 2344 if (rc < 0) 2345 return rc; 2346 2347 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { 2348 if (!res_get(fh, EM28XX_RESOURCE_VIDEO)) 2349 return POLLERR; 2350 return videobuf_poll_stream(filp, &fh->vb_vidq, wait); 2351 } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) { 2352 if (!res_get(fh, EM28XX_RESOURCE_VBI)) 2353 return POLLERR; 2354 return videobuf_poll_stream(filp, &fh->vb_vbiq, wait); 2355 } else { 2356 return POLLERR; 2357 } 2358} 2359 2360/* 2361 * em28xx_v4l2_mmap() 2362 */ 2363static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma) 2364{ 2365 struct em28xx_fh *fh = filp->private_data; 2366 struct em28xx *dev = fh->dev; 2367 int rc; 2368 2369 rc = check_dev(dev); 2370 if (rc < 0) 2371 return rc; 2372 2373 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 2374 rc = videobuf_mmap_mapper(&fh->vb_vidq, vma); 2375 else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) 2376 rc = videobuf_mmap_mapper(&fh->vb_vbiq, vma); 2377 2378 em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n", 2379 (unsigned long)vma->vm_start, 2380 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start, 2381 rc); 2382 2383 return rc; 2384} 2385 2386static const struct v4l2_file_operations em28xx_v4l_fops = { 2387 .owner = THIS_MODULE, 2388 .open = em28xx_v4l2_open, 2389 .release = em28xx_v4l2_close, 2390 .read = em28xx_v4l2_read, 2391 .poll = em28xx_v4l2_poll, 2392 .mmap = em28xx_v4l2_mmap, 2393 .unlocked_ioctl = video_ioctl2, 2394}; 2395 2396static const struct v4l2_ioctl_ops video_ioctl_ops = { 2397 .vidioc_querycap = vidioc_querycap, 2398 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 2399 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 2400 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 2401 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 2402 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 2403 .vidioc_s_fmt_vbi_cap = vidioc_s_fmt_vbi_cap, 2404 .vidioc_enum_framesizes = vidioc_enum_framesizes, 2405 .vidioc_g_audio = vidioc_g_audio, 2406 .vidioc_s_audio = vidioc_s_audio, 2407 .vidioc_cropcap = vidioc_cropcap, 2408 .vidioc_g_fmt_sliced_vbi_cap = vidioc_g_fmt_sliced_vbi_cap, 2409 .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap, 2410 .vidioc_s_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap, 2411 2412 .vidioc_reqbufs = vidioc_reqbufs, 2413 .vidioc_querybuf = vidioc_querybuf, 2414 .vidioc_qbuf = vidioc_qbuf, 2415 .vidioc_dqbuf = vidioc_dqbuf, 2416 .vidioc_g_std = vidioc_g_std, 2417 .vidioc_querystd = vidioc_querystd, 2418 .vidioc_s_std = vidioc_s_std, 2419 .vidioc_g_parm = vidioc_g_parm, 2420 .vidioc_s_parm = vidioc_s_parm, 2421 .vidioc_enum_input = vidioc_enum_input, 2422 .vidioc_g_input = vidioc_g_input, 2423 .vidioc_s_input = vidioc_s_input, 2424 .vidioc_queryctrl = vidioc_queryctrl, 2425 .vidioc_g_ctrl = vidioc_g_ctrl, 2426 .vidioc_s_ctrl = vidioc_s_ctrl, 2427 .vidioc_streamon = vidioc_streamon, 2428 .vidioc_streamoff = vidioc_streamoff, 2429 .vidioc_g_tuner = vidioc_g_tuner, 2430 .vidioc_s_tuner = vidioc_s_tuner, 2431 .vidioc_g_frequency = vidioc_g_frequency, 2432 .vidioc_s_frequency = vidioc_s_frequency, 2433#ifdef CONFIG_VIDEO_ADV_DEBUG 2434 .vidioc_g_register = vidioc_g_register, 2435 .vidioc_s_register = vidioc_s_register, 2436 .vidioc_g_chip_ident = vidioc_g_chip_ident, 2437#endif 2438}; 2439 2440static const struct video_device em28xx_video_template = { 2441 .fops = &em28xx_v4l_fops, 2442 .release = video_device_release, 2443 .ioctl_ops = &video_ioctl_ops, 2444 2445 .tvnorms = V4L2_STD_ALL, 2446 .current_norm = V4L2_STD_PAL, 2447}; 2448 2449static const struct v4l2_file_operations radio_fops = { 2450 .owner = THIS_MODULE, 2451 .open = em28xx_v4l2_open, 2452 .release = em28xx_v4l2_close, 2453 .unlocked_ioctl = video_ioctl2, 2454}; 2455 2456static const struct v4l2_ioctl_ops radio_ioctl_ops = { 2457 .vidioc_querycap = radio_querycap, 2458 .vidioc_g_tuner = radio_g_tuner, 2459 .vidioc_enum_input = radio_enum_input, 2460 .vidioc_g_audio = radio_g_audio, 2461 .vidioc_s_tuner = radio_s_tuner, 2462 .vidioc_s_audio = radio_s_audio, 2463 .vidioc_s_input = radio_s_input, 2464 .vidioc_queryctrl = radio_queryctrl, 2465 .vidioc_g_ctrl = vidioc_g_ctrl, 2466 .vidioc_s_ctrl = vidioc_s_ctrl, 2467 .vidioc_g_frequency = vidioc_g_frequency, 2468 .vidioc_s_frequency = vidioc_s_frequency, 2469#ifdef CONFIG_VIDEO_ADV_DEBUG 2470 .vidioc_g_register = vidioc_g_register, 2471 .vidioc_s_register = vidioc_s_register, 2472#endif 2473}; 2474 2475static struct video_device em28xx_radio_template = { 2476 .name = "em28xx-radio", 2477 .fops = &radio_fops, 2478 .ioctl_ops = &radio_ioctl_ops, 2479}; 2480 2481/******************************** usb interface ******************************/ 2482 2483 2484 2485static struct video_device *em28xx_vdev_init(struct em28xx *dev, 2486 const struct video_device *template, 2487 const char *type_name) 2488{ 2489 struct video_device *vfd; 2490 2491 vfd = video_device_alloc(); 2492 if (NULL == vfd) 2493 return NULL; 2494 2495 *vfd = *template; 2496 vfd->v4l2_dev = &dev->v4l2_dev; 2497 vfd->release = video_device_release; 2498 vfd->debug = video_debug; 2499 vfd->lock = &dev->lock; 2500 2501 snprintf(vfd->name, sizeof(vfd->name), "%s %s", 2502 dev->name, type_name); 2503 2504 video_set_drvdata(vfd, dev); 2505 return vfd; 2506} 2507 2508int em28xx_register_analog_devices(struct em28xx *dev) 2509{ 2510 u8 val; 2511 int ret; 2512 unsigned int maxw; 2513 2514 printk(KERN_INFO "%s: v4l2 driver version %s\n", 2515 dev->name, EM28XX_VERSION); 2516 2517 /* set default norm */ 2518 dev->norm = em28xx_video_template.current_norm; 2519 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm); 2520 dev->interlaced = EM28XX_INTERLACED_DEFAULT; 2521 dev->ctl_input = 0; 2522 2523 /* Analog specific initialization */ 2524 dev->format = &format[0]; 2525 2526 maxw = norm_maxw(dev); 2527 /* MaxPacketSize for em2800 is too small to capture at full resolution 2528 * use half of maxw as the scaler can only scale to 50% */ 2529 if (dev->board.is_em2800) 2530 maxw /= 2; 2531 2532 em28xx_set_video_format(dev, format[0].fourcc, 2533 maxw, norm_maxh(dev)); 2534 2535 video_mux(dev, dev->ctl_input); 2536 2537 /* Audio defaults */ 2538 dev->mute = 1; 2539 dev->volume = 0x1f; 2540 2541/* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */ 2542 val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK); 2543 em28xx_write_reg(dev, EM28XX_R0F_XCLK, 2544 (EM28XX_XCLK_AUDIO_UNMUTE | val)); 2545 2546 em28xx_set_outfmt(dev); 2547 em28xx_colorlevels_set_default(dev); 2548 em28xx_compression_disable(dev); 2549 2550 /* allocate and fill video video_device struct */ 2551 dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video"); 2552 if (!dev->vdev) { 2553 em28xx_errdev("cannot allocate video_device.\n"); 2554 return -ENODEV; 2555 } 2556 2557 /* register v4l2 video video_device */ 2558 ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER, 2559 video_nr[dev->devno]); 2560 if (ret) { 2561 em28xx_errdev("unable to register video device (error=%i).\n", 2562 ret); 2563 return ret; 2564 } 2565 2566 /* Allocate and fill vbi video_device struct */ 2567 if (em28xx_vbi_supported(dev) == 1) { 2568 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template, 2569 "vbi"); 2570 2571 /* register v4l2 vbi video_device */ 2572 ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI, 2573 vbi_nr[dev->devno]); 2574 if (ret < 0) { 2575 em28xx_errdev("unable to register vbi device\n"); 2576 return ret; 2577 } 2578 } 2579 2580 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) { 2581 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template, 2582 "radio"); 2583 if (!dev->radio_dev) { 2584 em28xx_errdev("cannot allocate video_device.\n"); 2585 return -ENODEV; 2586 } 2587 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO, 2588 radio_nr[dev->devno]); 2589 if (ret < 0) { 2590 em28xx_errdev("can't register radio device\n"); 2591 return ret; 2592 } 2593 em28xx_info("Registered radio device as %s\n", 2594 video_device_node_name(dev->radio_dev)); 2595 } 2596 2597 em28xx_info("V4L2 video device registered as %s\n", 2598 video_device_node_name(dev->vdev)); 2599 2600 if (dev->vbi_dev) 2601 em28xx_info("V4L2 VBI device registered as %s\n", 2602 video_device_node_name(dev->vbi_dev)); 2603 2604 return 0; 2605} 2606