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 60 static unsigned int isoc_debug; 61 module_param(isoc_debug, int, 0644); 62 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]"); 63 64 #define em28xx_isocdbg(fmt, arg...) \ 65 do {\ 66 if (isoc_debug) { \ 67 printk(KERN_INFO "%s %s :"fmt, \ 68 dev->name, __func__ , ##arg); \ 69 } \ 70 } while (0) 71 72 MODULE_AUTHOR(DRIVER_AUTHOR); 73 MODULE_DESCRIPTION(DRIVER_DESC); 74 MODULE_LICENSE("GPL"); 75 MODULE_VERSION(EM28XX_VERSION); 76 77 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; 78 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; 79 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; 80 81 module_param_array(video_nr, int, NULL, 0444); 82 module_param_array(vbi_nr, int, NULL, 0444); 83 module_param_array(radio_nr, int, NULL, 0444); 84 MODULE_PARM_DESC(video_nr, "video device numbers"); 85 MODULE_PARM_DESC(vbi_nr, "vbi device numbers"); 86 MODULE_PARM_DESC(radio_nr, "radio device numbers"); 87 88 static unsigned int video_debug; 89 module_param(video_debug, int, 0644); 90 MODULE_PARM_DESC(video_debug, "enable debug messages [video]"); 91 92 /* supported video standards */ 93 static 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 */ 129 static 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 */ 158 static 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 v4l2_get_timestamp(&buf->vb.ts); 167 168 dev->usb_ctl.vid_buf = NULL; 169 170 list_del(&buf->vb.queue); 171 wake_up(&buf->vb.done); 172 } 173 174 static 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 v4l2_get_timestamp(&buf->vb.ts); 184 185 dev->usb_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 */ 194 static 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 || buf->top_field) 211 fieldstart = outp; 212 else /* interlaced mode, even nr. of lines */ 213 fieldstart = outp + bytesperline; 214 215 linesdone = dma_q->pos / bytesperline; 216 currlinedone = dma_q->pos % bytesperline; 217 218 if (dev->progressive) 219 offset = linesdone * bytesperline + currlinedone; 220 else 221 offset = linesdone * bytesperline * 2 + currlinedone; 222 223 startwrite = fieldstart + offset; 224 lencopy = bytesperline - currlinedone; 225 lencopy = lencopy > remain ? remain : lencopy; 226 227 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) { 228 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n", 229 ((char *)startwrite + lencopy) - 230 ((char *)outp + buf->vb.size)); 231 remain = (char *)outp + buf->vb.size - (char *)startwrite; 232 lencopy = remain; 233 } 234 if (lencopy <= 0) 235 return; 236 memcpy(startwrite, startread, lencopy); 237 238 remain -= lencopy; 239 240 while (remain > 0) { 241 if (dev->progressive) 242 startwrite += lencopy; 243 else 244 startwrite += lencopy + bytesperline; 245 startread += lencopy; 246 if (bytesperline > remain) 247 lencopy = remain; 248 else 249 lencopy = bytesperline; 250 251 if ((char *)startwrite + lencopy > (char *)outp + 252 buf->vb.size) { 253 em28xx_isocdbg("Overflow of %zi bytes past buffer end" 254 "(2)\n", 255 ((char *)startwrite + lencopy) - 256 ((char *)outp + buf->vb.size)); 257 lencopy = remain = (char *)outp + buf->vb.size - 258 (char *)startwrite; 259 } 260 if (lencopy <= 0) 261 break; 262 263 memcpy(startwrite, startread, lencopy); 264 265 remain -= lencopy; 266 } 267 268 dma_q->pos += len; 269 } 270 271 static void em28xx_copy_vbi(struct em28xx *dev, 272 struct em28xx_dmaqueue *dma_q, 273 struct em28xx_buffer *buf, 274 unsigned char *p, 275 unsigned char *outp, unsigned long len) 276 { 277 void *startwrite, *startread; 278 int offset; 279 int bytesperline; 280 281 if (dev == NULL) { 282 em28xx_isocdbg("dev is null\n"); 283 return; 284 } 285 bytesperline = dev->vbi_width; 286 287 if (dma_q == NULL) { 288 em28xx_isocdbg("dma_q is null\n"); 289 return; 290 } 291 if (buf == NULL) { 292 return; 293 } 294 if (p == NULL) { 295 em28xx_isocdbg("p is null\n"); 296 return; 297 } 298 if (outp == NULL) { 299 em28xx_isocdbg("outp is null\n"); 300 return; 301 } 302 303 if (dma_q->pos + len > buf->vb.size) 304 len = buf->vb.size - dma_q->pos; 305 306 startread = p; 307 308 startwrite = outp + dma_q->pos; 309 offset = dma_q->pos; 310 311 /* Make sure the bottom field populates the second half of the frame */ 312 if (buf->top_field == 0) { 313 startwrite += bytesperline * dev->vbi_height; 314 offset += bytesperline * dev->vbi_height; 315 } 316 317 memcpy(startwrite, startread, len); 318 dma_q->pos += len; 319 } 320 321 static inline void print_err_status(struct em28xx *dev, 322 int packet, int status) 323 { 324 char *errmsg = "Unknown"; 325 326 switch (status) { 327 case -ENOENT: 328 errmsg = "unlinked synchronuously"; 329 break; 330 case -ECONNRESET: 331 errmsg = "unlinked asynchronuously"; 332 break; 333 case -ENOSR: 334 errmsg = "Buffer error (overrun)"; 335 break; 336 case -EPIPE: 337 errmsg = "Stalled (device not responding)"; 338 break; 339 case -EOVERFLOW: 340 errmsg = "Babble (bad cable?)"; 341 break; 342 case -EPROTO: 343 errmsg = "Bit-stuff error (bad cable?)"; 344 break; 345 case -EILSEQ: 346 errmsg = "CRC/Timeout (could be anything)"; 347 break; 348 case -ETIME: 349 errmsg = "Device does not respond"; 350 break; 351 } 352 if (packet < 0) { 353 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg); 354 } else { 355 em28xx_isocdbg("URB packet %d, status %d [%s].\n", 356 packet, status, errmsg); 357 } 358 } 359 360 /* 361 * video-buf generic routine to get the next available buffer 362 */ 363 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q, 364 struct em28xx_buffer **buf) 365 { 366 struct em28xx *dev = container_of(dma_q, struct em28xx, vidq); 367 char *outp; 368 369 if (list_empty(&dma_q->active)) { 370 em28xx_isocdbg("No active queue to serve\n"); 371 dev->usb_ctl.vid_buf = NULL; 372 *buf = NULL; 373 return; 374 } 375 376 /* Get the next buffer */ 377 *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue); 378 379 /* Cleans up buffer - Useful for testing for frame/URB loss */ 380 outp = videobuf_to_vmalloc(&(*buf)->vb); 381 memset(outp, 0, (*buf)->vb.size); 382 383 dev->usb_ctl.vid_buf = *buf; 384 385 return; 386 } 387 388 /* 389 * video-buf generic routine to get the next available VBI buffer 390 */ 391 static inline void vbi_get_next_buf(struct em28xx_dmaqueue *dma_q, 392 struct em28xx_buffer **buf) 393 { 394 struct em28xx *dev = container_of(dma_q, struct em28xx, vbiq); 395 char *outp; 396 397 if (list_empty(&dma_q->active)) { 398 em28xx_isocdbg("No active queue to serve\n"); 399 dev->usb_ctl.vbi_buf = NULL; 400 *buf = NULL; 401 return; 402 } 403 404 /* Get the next buffer */ 405 *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue); 406 /* Cleans up buffer - Useful for testing for frame/URB loss */ 407 outp = videobuf_to_vmalloc(&(*buf)->vb); 408 memset(outp, 0x00, (*buf)->vb.size); 409 410 dev->usb_ctl.vbi_buf = *buf; 411 412 return; 413 } 414 415 /* 416 * Controls the isoc copy of each urb packet 417 */ 418 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb) 419 { 420 struct em28xx_buffer *buf; 421 struct em28xx_dmaqueue *dma_q = &dev->vidq; 422 unsigned char *outp = NULL; 423 int i, len = 0, rc = 1; 424 unsigned char *p; 425 426 if (!dev) 427 return 0; 428 429 if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED)) 430 return 0; 431 432 if (urb->status < 0) 433 print_err_status(dev, -1, urb->status); 434 435 buf = dev->usb_ctl.vid_buf; 436 if (buf != NULL) 437 outp = videobuf_to_vmalloc(&buf->vb); 438 439 for (i = 0; i < urb->number_of_packets; i++) { 440 int status = urb->iso_frame_desc[i].status; 441 442 if (status < 0) { 443 print_err_status(dev, i, status); 444 if (urb->iso_frame_desc[i].status != -EPROTO) 445 continue; 446 } 447 448 len = urb->iso_frame_desc[i].actual_length - 4; 449 450 if (urb->iso_frame_desc[i].actual_length <= 0) { 451 /* em28xx_isocdbg("packet %d is empty",i); - spammy */ 452 continue; 453 } 454 if (urb->iso_frame_desc[i].actual_length > 455 dev->max_pkt_size) { 456 em28xx_isocdbg("packet bigger than packet size"); 457 continue; 458 } 459 460 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset; 461 462 /* FIXME: incomplete buffer checks where removed to make 463 logic simpler. Impacts of those changes should be evaluated 464 */ 465 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) { 466 em28xx_isocdbg("VBI HEADER!!!\n"); 467 /* FIXME: Should add vbi copy */ 468 continue; 469 } 470 if (p[0] == 0x22 && p[1] == 0x5a) { 471 em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2], 472 len, (p[2] & 1) ? "odd" : "even"); 473 474 if (dev->progressive || !(p[2] & 1)) { 475 if (buf != NULL) 476 buffer_filled(dev, dma_q, buf); 477 get_next_buf(dma_q, &buf); 478 if (buf == NULL) 479 outp = NULL; 480 else 481 outp = videobuf_to_vmalloc(&buf->vb); 482 } 483 484 if (buf != NULL) { 485 if (p[2] & 1) 486 buf->top_field = 0; 487 else 488 buf->top_field = 1; 489 } 490 491 dma_q->pos = 0; 492 } 493 if (buf != NULL) { 494 if (p[0] != 0x88 && p[0] != 0x22) { 495 em28xx_isocdbg("frame is not complete\n"); 496 len += 4; 497 } else { 498 p += 4; 499 } 500 em28xx_copy_video(dev, dma_q, buf, p, outp, len); 501 } 502 } 503 return rc; 504 } 505 506 /* Version of isoc handler that takes into account a mixture of video and 507 VBI data */ 508 static inline int em28xx_isoc_copy_vbi(struct em28xx *dev, struct urb *urb) 509 { 510 struct em28xx_buffer *buf, *vbi_buf; 511 struct em28xx_dmaqueue *dma_q = &dev->vidq; 512 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq; 513 unsigned char *outp = NULL; 514 unsigned char *vbioutp = NULL; 515 int i, len = 0, rc = 1; 516 unsigned char *p; 517 int vbi_size; 518 519 if (!dev) 520 return 0; 521 522 if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED)) 523 return 0; 524 525 if (urb->status < 0) 526 print_err_status(dev, -1, urb->status); 527 528 buf = dev->usb_ctl.vid_buf; 529 if (buf != NULL) 530 outp = videobuf_to_vmalloc(&buf->vb); 531 532 vbi_buf = dev->usb_ctl.vbi_buf; 533 if (vbi_buf != NULL) 534 vbioutp = videobuf_to_vmalloc(&vbi_buf->vb); 535 536 for (i = 0; i < urb->number_of_packets; i++) { 537 int status = urb->iso_frame_desc[i].status; 538 539 if (status < 0) { 540 print_err_status(dev, i, status); 541 if (urb->iso_frame_desc[i].status != -EPROTO) 542 continue; 543 } 544 545 len = urb->iso_frame_desc[i].actual_length; 546 if (urb->iso_frame_desc[i].actual_length <= 0) { 547 /* em28xx_isocdbg("packet %d is empty",i); - spammy */ 548 continue; 549 } 550 if (urb->iso_frame_desc[i].actual_length > 551 dev->max_pkt_size) { 552 em28xx_isocdbg("packet bigger than packet size"); 553 continue; 554 } 555 556 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset; 557 558 /* capture type 0 = vbi start 559 capture type 1 = video start 560 capture type 2 = video in progress */ 561 if (p[0] == 0x33 && p[1] == 0x95) { 562 dev->capture_type = 0; 563 dev->vbi_read = 0; 564 em28xx_isocdbg("VBI START HEADER!!!\n"); 565 dev->cur_field = p[2]; 566 p += 4; 567 len -= 4; 568 } else if (p[0] == 0x88 && p[1] == 0x88 && 569 p[2] == 0x88 && p[3] == 0x88) { 570 /* continuation */ 571 p += 4; 572 len -= 4; 573 } else if (p[0] == 0x22 && p[1] == 0x5a) { 574 /* start video */ 575 p += 4; 576 len -= 4; 577 } 578 579 vbi_size = dev->vbi_width * dev->vbi_height; 580 581 if (dev->capture_type == 0) { 582 if (dev->vbi_read >= vbi_size) { 583 /* We've already read all the VBI data, so 584 treat the rest as video */ 585 em28xx_isocdbg("dev->vbi_read > vbi_size\n"); 586 } else if ((dev->vbi_read + len) < vbi_size) { 587 /* This entire frame is VBI data */ 588 if (dev->vbi_read == 0 && 589 (!(dev->cur_field & 1))) { 590 /* Brand new frame */ 591 if (vbi_buf != NULL) 592 vbi_buffer_filled(dev, 593 vbi_dma_q, 594 vbi_buf); 595 vbi_get_next_buf(vbi_dma_q, &vbi_buf); 596 if (vbi_buf == NULL) 597 vbioutp = NULL; 598 else 599 vbioutp = videobuf_to_vmalloc( 600 &vbi_buf->vb); 601 } 602 603 if (dev->vbi_read == 0) { 604 vbi_dma_q->pos = 0; 605 if (vbi_buf != NULL) { 606 if (dev->cur_field & 1) 607 vbi_buf->top_field = 0; 608 else 609 vbi_buf->top_field = 1; 610 } 611 } 612 613 dev->vbi_read += len; 614 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p, 615 vbioutp, len); 616 } else { 617 /* Some of this frame is VBI data and some is 618 video data */ 619 int vbi_data_len = vbi_size - dev->vbi_read; 620 dev->vbi_read += vbi_data_len; 621 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p, 622 vbioutp, vbi_data_len); 623 dev->capture_type = 1; 624 p += vbi_data_len; 625 len -= vbi_data_len; 626 } 627 } 628 629 if (dev->capture_type == 1) { 630 dev->capture_type = 2; 631 if (dev->progressive || !(dev->cur_field & 1)) { 632 if (buf != NULL) 633 buffer_filled(dev, dma_q, buf); 634 get_next_buf(dma_q, &buf); 635 if (buf == NULL) 636 outp = NULL; 637 else 638 outp = videobuf_to_vmalloc(&buf->vb); 639 } 640 if (buf != NULL) { 641 if (dev->cur_field & 1) 642 buf->top_field = 0; 643 else 644 buf->top_field = 1; 645 } 646 647 dma_q->pos = 0; 648 } 649 650 if (buf != NULL && dev->capture_type == 2) { 651 if (len >= 4 && p[0] == 0x88 && p[1] == 0x88 && 652 p[2] == 0x88 && p[3] == 0x88) { 653 p += 4; 654 len -= 4; 655 } 656 if (len >= 4 && p[0] == 0x22 && p[1] == 0x5a) { 657 em28xx_isocdbg("Video frame %d, len=%i, %s\n", 658 p[2], len, (p[2] & 1) ? 659 "odd" : "even"); 660 p += 4; 661 len -= 4; 662 } 663 664 if (len > 0) 665 em28xx_copy_video(dev, dma_q, buf, p, outp, 666 len); 667 } 668 } 669 return rc; 670 } 671 672 673 /* ------------------------------------------------------------------ 674 Videobuf operations 675 ------------------------------------------------------------------*/ 676 677 static int 678 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size) 679 { 680 struct em28xx_fh *fh = vq->priv_data; 681 struct em28xx *dev = fh->dev; 682 struct v4l2_frequency f; 683 684 *size = (fh->dev->width * fh->dev->height * dev->format->depth + 7) 685 >> 3; 686 687 if (0 == *count) 688 *count = EM28XX_DEF_BUF; 689 690 if (*count < EM28XX_MIN_BUF) 691 *count = EM28XX_MIN_BUF; 692 693 /* Ask tuner to go to analog or radio mode */ 694 memset(&f, 0, sizeof(f)); 695 f.frequency = dev->ctl_freq; 696 f.type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 697 698 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f); 699 700 return 0; 701 } 702 703 /* This is called *without* dev->slock held; please keep it that way */ 704 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf) 705 { 706 struct em28xx_fh *fh = vq->priv_data; 707 struct em28xx *dev = fh->dev; 708 unsigned long flags = 0; 709 if (in_interrupt()) 710 BUG(); 711 712 /* We used to wait for the buffer to finish here, but this didn't work 713 because, as we were keeping the state as VIDEOBUF_QUEUED, 714 videobuf_queue_cancel marked it as finished for us. 715 (Also, it could wedge forever if the hardware was misconfigured.) 716 717 This should be safe; by the time we get here, the buffer isn't 718 queued anymore. If we ever start marking the buffers as 719 VIDEOBUF_ACTIVE, it won't be, though. 720 */ 721 spin_lock_irqsave(&dev->slock, flags); 722 if (dev->usb_ctl.vid_buf == buf) 723 dev->usb_ctl.vid_buf = NULL; 724 spin_unlock_irqrestore(&dev->slock, flags); 725 726 videobuf_vmalloc_free(&buf->vb); 727 buf->vb.state = VIDEOBUF_NEEDS_INIT; 728 } 729 730 static int 731 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, 732 enum v4l2_field field) 733 { 734 struct em28xx_fh *fh = vq->priv_data; 735 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); 736 struct em28xx *dev = fh->dev; 737 int rc = 0, urb_init = 0; 738 739 buf->vb.size = (fh->dev->width * fh->dev->height * dev->format->depth 740 + 7) >> 3; 741 742 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size) 743 return -EINVAL; 744 745 buf->vb.width = dev->width; 746 buf->vb.height = dev->height; 747 buf->vb.field = field; 748 749 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { 750 rc = videobuf_iolock(vq, &buf->vb, NULL); 751 if (rc < 0) 752 goto fail; 753 } 754 755 if (!dev->usb_ctl.analog_bufs.num_bufs) 756 urb_init = 1; 757 758 if (urb_init) { 759 if (em28xx_vbi_supported(dev) == 1) 760 rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE, 0, 761 EM28XX_NUM_BUFS, 762 dev->max_pkt_size, 763 EM28XX_NUM_ISOC_PACKETS, 764 em28xx_isoc_copy_vbi); 765 else 766 rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE, 0, 767 EM28XX_NUM_BUFS, 768 dev->max_pkt_size, 769 EM28XX_NUM_ISOC_PACKETS, 770 em28xx_isoc_copy); 771 if (rc < 0) 772 goto fail; 773 } 774 775 buf->vb.state = VIDEOBUF_PREPARED; 776 return 0; 777 778 fail: 779 free_buffer(vq, buf); 780 return rc; 781 } 782 783 static void 784 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) 785 { 786 struct em28xx_buffer *buf = container_of(vb, 787 struct em28xx_buffer, 788 vb); 789 struct em28xx_fh *fh = vq->priv_data; 790 struct em28xx *dev = fh->dev; 791 struct em28xx_dmaqueue *vidq = &dev->vidq; 792 793 buf->vb.state = VIDEOBUF_QUEUED; 794 list_add_tail(&buf->vb.queue, &vidq->active); 795 796 } 797 798 static void buffer_release(struct videobuf_queue *vq, 799 struct videobuf_buffer *vb) 800 { 801 struct em28xx_buffer *buf = container_of(vb, 802 struct em28xx_buffer, 803 vb); 804 struct em28xx_fh *fh = vq->priv_data; 805 struct em28xx *dev = (struct em28xx *)fh->dev; 806 807 em28xx_isocdbg("em28xx: called buffer_release\n"); 808 809 free_buffer(vq, buf); 810 } 811 812 static struct videobuf_queue_ops em28xx_video_qops = { 813 .buf_setup = buffer_setup, 814 .buf_prepare = buffer_prepare, 815 .buf_queue = buffer_queue, 816 .buf_release = buffer_release, 817 }; 818 819 /********************* v4l2 interface **************************************/ 820 821 static void video_mux(struct em28xx *dev, int index) 822 { 823 dev->ctl_input = index; 824 dev->ctl_ainput = INPUT(index)->amux; 825 dev->ctl_aoutput = INPUT(index)->aout; 826 827 if (!dev->ctl_aoutput) 828 dev->ctl_aoutput = EM28XX_AOUT_MASTER; 829 830 v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing, 831 INPUT(index)->vmux, 0, 0); 832 833 if (dev->board.has_msp34xx) { 834 if (dev->i2s_speed) { 835 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, 836 s_i2s_clock_freq, dev->i2s_speed); 837 } 838 /* Note: this is msp3400 specific */ 839 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing, 840 dev->ctl_ainput, MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0); 841 } 842 843 if (dev->board.adecoder != EM28XX_NOADECODER) { 844 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing, 845 dev->ctl_ainput, dev->ctl_aoutput, 0); 846 } 847 848 em28xx_audio_analog_set(dev); 849 } 850 851 /* Usage lock check functions */ 852 static int res_get(struct em28xx_fh *fh, unsigned int bit) 853 { 854 struct em28xx *dev = fh->dev; 855 856 if (fh->resources & bit) 857 /* have it already allocated */ 858 return 1; 859 860 /* is it free? */ 861 if (dev->resources & bit) { 862 /* no, someone else uses it */ 863 return 0; 864 } 865 /* it's free, grab it */ 866 fh->resources |= bit; 867 dev->resources |= bit; 868 em28xx_videodbg("res: get %d\n", bit); 869 return 1; 870 } 871 872 static int res_check(struct em28xx_fh *fh, unsigned int bit) 873 { 874 return fh->resources & bit; 875 } 876 877 static int res_locked(struct em28xx *dev, unsigned int bit) 878 { 879 return dev->resources & bit; 880 } 881 882 static void res_free(struct em28xx_fh *fh, unsigned int bits) 883 { 884 struct em28xx *dev = fh->dev; 885 886 BUG_ON((fh->resources & bits) != bits); 887 888 fh->resources &= ~bits; 889 dev->resources &= ~bits; 890 em28xx_videodbg("res: put %d\n", bits); 891 } 892 893 static int get_ressource(struct em28xx_fh *fh) 894 { 895 switch (fh->type) { 896 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 897 return EM28XX_RESOURCE_VIDEO; 898 case V4L2_BUF_TYPE_VBI_CAPTURE: 899 return EM28XX_RESOURCE_VBI; 900 default: 901 BUG(); 902 return 0; 903 } 904 } 905 906 /* 907 * ac97_queryctrl() 908 * return the ac97 supported controls 909 */ 910 static int ac97_queryctrl(struct v4l2_queryctrl *qc) 911 { 912 int i; 913 914 for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) { 915 if (qc->id && qc->id == ac97_qctrl[i].id) { 916 memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc)); 917 return 0; 918 } 919 } 920 921 /* Control is not ac97 related */ 922 return 1; 923 } 924 925 /* 926 * ac97_get_ctrl() 927 * return the current values for ac97 mute and volume 928 */ 929 static int ac97_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl) 930 { 931 switch (ctrl->id) { 932 case V4L2_CID_AUDIO_MUTE: 933 ctrl->value = dev->mute; 934 return 0; 935 case V4L2_CID_AUDIO_VOLUME: 936 ctrl->value = dev->volume; 937 return 0; 938 default: 939 /* Control is not ac97 related */ 940 return 1; 941 } 942 } 943 944 /* 945 * ac97_set_ctrl() 946 * set values for ac97 mute and volume 947 */ 948 static int ac97_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl) 949 { 950 int i; 951 952 for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) 953 if (ctrl->id == ac97_qctrl[i].id) 954 goto handle; 955 956 /* Announce that hasn't handle it */ 957 return 1; 958 959 handle: 960 if (ctrl->value < ac97_qctrl[i].minimum || 961 ctrl->value > ac97_qctrl[i].maximum) 962 return -ERANGE; 963 964 switch (ctrl->id) { 965 case V4L2_CID_AUDIO_MUTE: 966 dev->mute = ctrl->value; 967 break; 968 case V4L2_CID_AUDIO_VOLUME: 969 dev->volume = ctrl->value; 970 break; 971 } 972 973 return em28xx_audio_analog_set(dev); 974 } 975 976 static int check_dev(struct em28xx *dev) 977 { 978 if (dev->state & DEV_DISCONNECTED) { 979 em28xx_errdev("v4l2 ioctl: device not present\n"); 980 return -ENODEV; 981 } 982 983 if (dev->state & DEV_MISCONFIGURED) { 984 em28xx_errdev("v4l2 ioctl: device is misconfigured; " 985 "close and open it again\n"); 986 return -EIO; 987 } 988 return 0; 989 } 990 991 static void get_scale(struct em28xx *dev, 992 unsigned int width, unsigned int height, 993 unsigned int *hscale, unsigned int *vscale) 994 { 995 unsigned int maxw = norm_maxw(dev); 996 unsigned int maxh = norm_maxh(dev); 997 998 *hscale = (((unsigned long)maxw) << 12) / width - 4096L; 999 if (*hscale >= 0x4000) 1000 *hscale = 0x3fff; 1001 1002 *vscale = (((unsigned long)maxh) << 12) / height - 4096L; 1003 if (*vscale >= 0x4000) 1004 *vscale = 0x3fff; 1005 } 1006 1007 /* ------------------------------------------------------------------ 1008 IOCTL vidioc handling 1009 ------------------------------------------------------------------*/ 1010 1011 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 1012 struct v4l2_format *f) 1013 { 1014 struct em28xx_fh *fh = priv; 1015 struct em28xx *dev = fh->dev; 1016 1017 f->fmt.pix.width = dev->width; 1018 f->fmt.pix.height = dev->height; 1019 f->fmt.pix.pixelformat = dev->format->fourcc; 1020 f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3; 1021 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * dev->height; 1022 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 1023 1024 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */ 1025 if (dev->progressive) 1026 f->fmt.pix.field = V4L2_FIELD_NONE; 1027 else 1028 f->fmt.pix.field = dev->interlaced ? 1029 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; 1030 return 0; 1031 } 1032 1033 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc) 1034 { 1035 unsigned int i; 1036 1037 for (i = 0; i < ARRAY_SIZE(format); i++) 1038 if (format[i].fourcc == fourcc) 1039 return &format[i]; 1040 1041 return NULL; 1042 } 1043 1044 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 1045 struct v4l2_format *f) 1046 { 1047 struct em28xx_fh *fh = priv; 1048 struct em28xx *dev = fh->dev; 1049 unsigned int width = f->fmt.pix.width; 1050 unsigned int height = f->fmt.pix.height; 1051 unsigned int maxw = norm_maxw(dev); 1052 unsigned int maxh = norm_maxh(dev); 1053 unsigned int hscale, vscale; 1054 struct em28xx_fmt *fmt; 1055 1056 fmt = format_by_fourcc(f->fmt.pix.pixelformat); 1057 if (!fmt) { 1058 em28xx_videodbg("Fourcc format (%08x) invalid.\n", 1059 f->fmt.pix.pixelformat); 1060 return -EINVAL; 1061 } 1062 1063 if (dev->board.is_em2800) { 1064 /* the em2800 can only scale down to 50% */ 1065 height = height > (3 * maxh / 4) ? maxh : maxh / 2; 1066 width = width > (3 * maxw / 4) ? maxw : maxw / 2; 1067 /* MaxPacketSize for em2800 is too small to capture at full resolution 1068 * use half of maxw as the scaler can only scale to 50% */ 1069 if (width == maxw && height == maxh) 1070 width /= 2; 1071 } else { 1072 /* width must even because of the YUYV format 1073 height must be even because of interlacing */ 1074 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh, 1075 1, 0); 1076 } 1077 1078 get_scale(dev, width, height, &hscale, &vscale); 1079 1080 width = (((unsigned long)maxw) << 12) / (hscale + 4096L); 1081 height = (((unsigned long)maxh) << 12) / (vscale + 4096L); 1082 1083 f->fmt.pix.width = width; 1084 f->fmt.pix.height = height; 1085 f->fmt.pix.pixelformat = fmt->fourcc; 1086 f->fmt.pix.bytesperline = (dev->width * fmt->depth + 7) >> 3; 1087 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height; 1088 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 1089 if (dev->progressive) 1090 f->fmt.pix.field = V4L2_FIELD_NONE; 1091 else 1092 f->fmt.pix.field = dev->interlaced ? 1093 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; 1094 1095 return 0; 1096 } 1097 1098 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc, 1099 unsigned width, unsigned height) 1100 { 1101 struct em28xx_fmt *fmt; 1102 1103 fmt = format_by_fourcc(fourcc); 1104 if (!fmt) 1105 return -EINVAL; 1106 1107 dev->format = fmt; 1108 dev->width = width; 1109 dev->height = height; 1110 1111 /* set new image size */ 1112 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale); 1113 1114 em28xx_set_alternate(dev); 1115 em28xx_resolution_set(dev); 1116 1117 return 0; 1118 } 1119 1120 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 1121 struct v4l2_format *f) 1122 { 1123 struct em28xx_fh *fh = priv; 1124 struct em28xx *dev = fh->dev; 1125 int rc; 1126 1127 rc = check_dev(dev); 1128 if (rc < 0) 1129 return rc; 1130 1131 vidioc_try_fmt_vid_cap(file, priv, f); 1132 1133 if (videobuf_queue_is_busy(&fh->vb_vidq)) { 1134 em28xx_errdev("%s queue busy\n", __func__); 1135 return -EBUSY; 1136 } 1137 1138 return em28xx_set_video_format(dev, f->fmt.pix.pixelformat, 1139 f->fmt.pix.width, f->fmt.pix.height); 1140 } 1141 1142 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm) 1143 { 1144 struct em28xx_fh *fh = priv; 1145 struct em28xx *dev = fh->dev; 1146 int rc; 1147 1148 rc = check_dev(dev); 1149 if (rc < 0) 1150 return rc; 1151 1152 *norm = dev->norm; 1153 1154 return 0; 1155 } 1156 1157 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm) 1158 { 1159 struct em28xx_fh *fh = priv; 1160 struct em28xx *dev = fh->dev; 1161 int rc; 1162 1163 rc = check_dev(dev); 1164 if (rc < 0) 1165 return rc; 1166 1167 v4l2_device_call_all(&dev->v4l2_dev, 0, video, querystd, norm); 1168 1169 return 0; 1170 } 1171 1172 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm) 1173 { 1174 struct em28xx_fh *fh = priv; 1175 struct em28xx *dev = fh->dev; 1176 struct v4l2_format f; 1177 int rc; 1178 1179 rc = check_dev(dev); 1180 if (rc < 0) 1181 return rc; 1182 1183 dev->norm = *norm; 1184 1185 /* Adjusts width/height, if needed */ 1186 f.fmt.pix.width = dev->width; 1187 f.fmt.pix.height = dev->height; 1188 vidioc_try_fmt_vid_cap(file, priv, &f); 1189 1190 /* set new image size */ 1191 dev->width = f.fmt.pix.width; 1192 dev->height = f.fmt.pix.height; 1193 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale); 1194 1195 em28xx_resolution_set(dev); 1196 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm); 1197 1198 return 0; 1199 } 1200 1201 static int vidioc_g_parm(struct file *file, void *priv, 1202 struct v4l2_streamparm *p) 1203 { 1204 struct em28xx_fh *fh = priv; 1205 struct em28xx *dev = fh->dev; 1206 int rc = 0; 1207 1208 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 1209 return -EINVAL; 1210 1211 if (dev->board.is_webcam) 1212 rc = v4l2_device_call_until_err(&dev->v4l2_dev, 0, 1213 video, g_parm, p); 1214 else 1215 v4l2_video_std_frame_period(dev->norm, 1216 &p->parm.capture.timeperframe); 1217 1218 return rc; 1219 } 1220 1221 static int vidioc_s_parm(struct file *file, void *priv, 1222 struct v4l2_streamparm *p) 1223 { 1224 struct em28xx_fh *fh = priv; 1225 struct em28xx *dev = fh->dev; 1226 1227 if (!dev->board.is_webcam) 1228 return -EINVAL; 1229 1230 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 1231 return -EINVAL; 1232 1233 return v4l2_device_call_until_err(&dev->v4l2_dev, 0, video, s_parm, p); 1234 } 1235 1236 static const char *iname[] = { 1237 [EM28XX_VMUX_COMPOSITE1] = "Composite1", 1238 [EM28XX_VMUX_COMPOSITE2] = "Composite2", 1239 [EM28XX_VMUX_COMPOSITE3] = "Composite3", 1240 [EM28XX_VMUX_COMPOSITE4] = "Composite4", 1241 [EM28XX_VMUX_SVIDEO] = "S-Video", 1242 [EM28XX_VMUX_TELEVISION] = "Television", 1243 [EM28XX_VMUX_CABLE] = "Cable TV", 1244 [EM28XX_VMUX_DVB] = "DVB", 1245 [EM28XX_VMUX_DEBUG] = "for debug only", 1246 }; 1247 1248 static int vidioc_enum_input(struct file *file, void *priv, 1249 struct v4l2_input *i) 1250 { 1251 struct em28xx_fh *fh = priv; 1252 struct em28xx *dev = fh->dev; 1253 unsigned int n; 1254 1255 n = i->index; 1256 if (n >= MAX_EM28XX_INPUT) 1257 return -EINVAL; 1258 if (0 == INPUT(n)->type) 1259 return -EINVAL; 1260 1261 i->index = n; 1262 i->type = V4L2_INPUT_TYPE_CAMERA; 1263 1264 strcpy(i->name, iname[INPUT(n)->type]); 1265 1266 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) || 1267 (EM28XX_VMUX_CABLE == INPUT(n)->type)) 1268 i->type = V4L2_INPUT_TYPE_TUNER; 1269 1270 i->std = dev->vdev->tvnorms; 1271 1272 return 0; 1273 } 1274 1275 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 1276 { 1277 struct em28xx_fh *fh = priv; 1278 struct em28xx *dev = fh->dev; 1279 1280 *i = dev->ctl_input; 1281 1282 return 0; 1283 } 1284 1285 static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 1286 { 1287 struct em28xx_fh *fh = priv; 1288 struct em28xx *dev = fh->dev; 1289 int rc; 1290 1291 rc = check_dev(dev); 1292 if (rc < 0) 1293 return rc; 1294 1295 if (i >= MAX_EM28XX_INPUT) 1296 return -EINVAL; 1297 if (0 == INPUT(i)->type) 1298 return -EINVAL; 1299 1300 video_mux(dev, i); 1301 return 0; 1302 } 1303 1304 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a) 1305 { 1306 struct em28xx_fh *fh = priv; 1307 struct em28xx *dev = fh->dev; 1308 1309 if (!dev->audio_mode.has_audio) 1310 return -EINVAL; 1311 1312 switch (a->index) { 1313 case EM28XX_AMUX_VIDEO: 1314 strcpy(a->name, "Television"); 1315 break; 1316 case EM28XX_AMUX_LINE_IN: 1317 strcpy(a->name, "Line In"); 1318 break; 1319 case EM28XX_AMUX_VIDEO2: 1320 strcpy(a->name, "Television alt"); 1321 break; 1322 case EM28XX_AMUX_PHONE: 1323 strcpy(a->name, "Phone"); 1324 break; 1325 case EM28XX_AMUX_MIC: 1326 strcpy(a->name, "Mic"); 1327 break; 1328 case EM28XX_AMUX_CD: 1329 strcpy(a->name, "CD"); 1330 break; 1331 case EM28XX_AMUX_AUX: 1332 strcpy(a->name, "Aux"); 1333 break; 1334 case EM28XX_AMUX_PCM_OUT: 1335 strcpy(a->name, "PCM"); 1336 break; 1337 default: 1338 return -EINVAL; 1339 } 1340 1341 a->index = dev->ctl_ainput; 1342 a->capability = V4L2_AUDCAP_STEREO; 1343 1344 return 0; 1345 } 1346 1347 static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio *a) 1348 { 1349 struct em28xx_fh *fh = priv; 1350 struct em28xx *dev = fh->dev; 1351 1352 1353 if (!dev->audio_mode.has_audio) 1354 return -EINVAL; 1355 1356 if (a->index >= MAX_EM28XX_INPUT) 1357 return -EINVAL; 1358 if (0 == INPUT(a->index)->type) 1359 return -EINVAL; 1360 1361 dev->ctl_ainput = INPUT(a->index)->amux; 1362 dev->ctl_aoutput = INPUT(a->index)->aout; 1363 1364 if (!dev->ctl_aoutput) 1365 dev->ctl_aoutput = EM28XX_AOUT_MASTER; 1366 1367 return 0; 1368 } 1369 1370 static int vidioc_queryctrl(struct file *file, void *priv, 1371 struct v4l2_queryctrl *qc) 1372 { 1373 struct em28xx_fh *fh = priv; 1374 struct em28xx *dev = fh->dev; 1375 int id = qc->id; 1376 int rc; 1377 1378 rc = check_dev(dev); 1379 if (rc < 0) 1380 return rc; 1381 1382 memset(qc, 0, sizeof(*qc)); 1383 1384 qc->id = id; 1385 1386 /* enumerate AC97 controls */ 1387 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) { 1388 rc = ac97_queryctrl(qc); 1389 if (!rc) 1390 return 0; 1391 } 1392 1393 /* enumerate V4L2 device controls */ 1394 v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, qc); 1395 1396 if (qc->type) 1397 return 0; 1398 else 1399 return -EINVAL; 1400 } 1401 1402 /* 1403 * FIXME: This is an indirect way to check if a control exists at a 1404 * subdev. Instead of that hack, maybe the better would be to change all 1405 * subdevs to return -ENOIOCTLCMD, if an ioctl is not supported. 1406 */ 1407 static int check_subdev_ctrl(struct em28xx *dev, int id) 1408 { 1409 struct v4l2_queryctrl qc; 1410 1411 memset(&qc, 0, sizeof(qc)); 1412 qc.id = id; 1413 1414 /* enumerate V4L2 device controls */ 1415 v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, &qc); 1416 1417 if (qc.type) 1418 return 0; 1419 else 1420 return -EINVAL; 1421 } 1422 1423 static int vidioc_g_ctrl(struct file *file, void *priv, 1424 struct v4l2_control *ctrl) 1425 { 1426 struct em28xx_fh *fh = priv; 1427 struct em28xx *dev = fh->dev; 1428 int rc; 1429 1430 rc = check_dev(dev); 1431 if (rc < 0) 1432 return rc; 1433 rc = 0; 1434 1435 /* Set an AC97 control */ 1436 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) 1437 rc = ac97_get_ctrl(dev, ctrl); 1438 else 1439 rc = 1; 1440 1441 /* It were not an AC97 control. Sends it to the v4l2 dev interface */ 1442 if (rc == 1) { 1443 if (check_subdev_ctrl(dev, ctrl->id)) 1444 return -EINVAL; 1445 1446 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_ctrl, ctrl); 1447 rc = 0; 1448 } 1449 1450 return rc; 1451 } 1452 1453 static int vidioc_s_ctrl(struct file *file, void *priv, 1454 struct v4l2_control *ctrl) 1455 { 1456 struct em28xx_fh *fh = priv; 1457 struct em28xx *dev = fh->dev; 1458 int rc; 1459 1460 rc = check_dev(dev); 1461 if (rc < 0) 1462 return rc; 1463 1464 /* Set an AC97 control */ 1465 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) 1466 rc = ac97_set_ctrl(dev, ctrl); 1467 else 1468 rc = 1; 1469 1470 /* It isn't an AC97 control. Sends it to the v4l2 dev interface */ 1471 if (rc == 1) { 1472 rc = check_subdev_ctrl(dev, ctrl->id); 1473 if (!rc) 1474 v4l2_device_call_all(&dev->v4l2_dev, 0, 1475 core, s_ctrl, ctrl); 1476 /* 1477 * In the case of non-AC97 volume controls, we still need 1478 * to do some setups at em28xx, in order to mute/unmute 1479 * and to adjust audio volume. However, the value ranges 1480 * should be checked by the corresponding V4L subdriver. 1481 */ 1482 switch (ctrl->id) { 1483 case V4L2_CID_AUDIO_MUTE: 1484 dev->mute = ctrl->value; 1485 rc = em28xx_audio_analog_set(dev); 1486 break; 1487 case V4L2_CID_AUDIO_VOLUME: 1488 dev->volume = ctrl->value; 1489 rc = em28xx_audio_analog_set(dev); 1490 } 1491 } 1492 return (rc < 0) ? rc : 0; 1493 } 1494 1495 static int vidioc_g_tuner(struct file *file, void *priv, 1496 struct v4l2_tuner *t) 1497 { 1498 struct em28xx_fh *fh = priv; 1499 struct em28xx *dev = fh->dev; 1500 int rc; 1501 1502 rc = check_dev(dev); 1503 if (rc < 0) 1504 return rc; 1505 1506 if (0 != t->index) 1507 return -EINVAL; 1508 1509 strcpy(t->name, "Tuner"); 1510 t->type = V4L2_TUNER_ANALOG_TV; 1511 1512 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t); 1513 return 0; 1514 } 1515 1516 static int vidioc_s_tuner(struct file *file, void *priv, 1517 struct v4l2_tuner *t) 1518 { 1519 struct em28xx_fh *fh = priv; 1520 struct em28xx *dev = fh->dev; 1521 int rc; 1522 1523 rc = check_dev(dev); 1524 if (rc < 0) 1525 return rc; 1526 1527 if (0 != t->index) 1528 return -EINVAL; 1529 1530 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t); 1531 return 0; 1532 } 1533 1534 static int vidioc_g_frequency(struct file *file, void *priv, 1535 struct v4l2_frequency *f) 1536 { 1537 struct em28xx_fh *fh = priv; 1538 struct em28xx *dev = fh->dev; 1539 1540 f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1541 f->frequency = dev->ctl_freq; 1542 return 0; 1543 } 1544 1545 static int vidioc_s_frequency(struct file *file, void *priv, 1546 struct v4l2_frequency *f) 1547 { 1548 struct em28xx_fh *fh = priv; 1549 struct em28xx *dev = fh->dev; 1550 int rc; 1551 1552 rc = check_dev(dev); 1553 if (rc < 0) 1554 return rc; 1555 1556 if (0 != f->tuner) 1557 return -EINVAL; 1558 1559 if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV)) 1560 return -EINVAL; 1561 if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO)) 1562 return -EINVAL; 1563 1564 dev->ctl_freq = f->frequency; 1565 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f); 1566 1567 return 0; 1568 } 1569 1570 #ifdef CONFIG_VIDEO_ADV_DEBUG 1571 static int em28xx_reg_len(int reg) 1572 { 1573 switch (reg) { 1574 case EM28XX_R40_AC97LSB: 1575 case EM28XX_R30_HSCALELOW: 1576 case EM28XX_R32_VSCALELOW: 1577 return 2; 1578 default: 1579 return 1; 1580 } 1581 } 1582 1583 static int vidioc_g_chip_ident(struct file *file, void *priv, 1584 struct v4l2_dbg_chip_ident *chip) 1585 { 1586 struct em28xx_fh *fh = priv; 1587 struct em28xx *dev = fh->dev; 1588 1589 chip->ident = V4L2_IDENT_NONE; 1590 chip->revision = 0; 1591 1592 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_chip_ident, chip); 1593 1594 return 0; 1595 } 1596 1597 1598 static int vidioc_g_register(struct file *file, void *priv, 1599 struct v4l2_dbg_register *reg) 1600 { 1601 struct em28xx_fh *fh = priv; 1602 struct em28xx *dev = fh->dev; 1603 int ret; 1604 1605 switch (reg->match.type) { 1606 case V4L2_CHIP_MATCH_AC97: 1607 ret = em28xx_read_ac97(dev, reg->reg); 1608 if (ret < 0) 1609 return ret; 1610 1611 reg->val = ret; 1612 reg->size = 1; 1613 return 0; 1614 case V4L2_CHIP_MATCH_I2C_DRIVER: 1615 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg); 1616 return 0; 1617 case V4L2_CHIP_MATCH_I2C_ADDR: 1618 /* TODO: is this correct? */ 1619 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg); 1620 return 0; 1621 default: 1622 if (!v4l2_chip_match_host(®->match)) 1623 return -EINVAL; 1624 } 1625 1626 /* Match host */ 1627 reg->size = em28xx_reg_len(reg->reg); 1628 if (reg->size == 1) { 1629 ret = em28xx_read_reg(dev, reg->reg); 1630 1631 if (ret < 0) 1632 return ret; 1633 1634 reg->val = ret; 1635 } else { 1636 __le16 val = 0; 1637 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS, 1638 reg->reg, (char *)&val, 2); 1639 if (ret < 0) 1640 return ret; 1641 1642 reg->val = le16_to_cpu(val); 1643 } 1644 1645 return 0; 1646 } 1647 1648 static int vidioc_s_register(struct file *file, void *priv, 1649 struct v4l2_dbg_register *reg) 1650 { 1651 struct em28xx_fh *fh = priv; 1652 struct em28xx *dev = fh->dev; 1653 __le16 buf; 1654 1655 switch (reg->match.type) { 1656 case V4L2_CHIP_MATCH_AC97: 1657 return em28xx_write_ac97(dev, reg->reg, reg->val); 1658 case V4L2_CHIP_MATCH_I2C_DRIVER: 1659 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg); 1660 return 0; 1661 case V4L2_CHIP_MATCH_I2C_ADDR: 1662 /* TODO: is this correct? */ 1663 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg); 1664 return 0; 1665 default: 1666 if (!v4l2_chip_match_host(®->match)) 1667 return -EINVAL; 1668 } 1669 1670 /* Match host */ 1671 buf = cpu_to_le16(reg->val); 1672 1673 return em28xx_write_regs(dev, reg->reg, (char *)&buf, 1674 em28xx_reg_len(reg->reg)); 1675 } 1676 #endif 1677 1678 1679 static int vidioc_cropcap(struct file *file, void *priv, 1680 struct v4l2_cropcap *cc) 1681 { 1682 struct em28xx_fh *fh = priv; 1683 struct em28xx *dev = fh->dev; 1684 1685 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 1686 return -EINVAL; 1687 1688 cc->bounds.left = 0; 1689 cc->bounds.top = 0; 1690 cc->bounds.width = dev->width; 1691 cc->bounds.height = dev->height; 1692 cc->defrect = cc->bounds; 1693 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */ 1694 cc->pixelaspect.denominator = 59; 1695 1696 return 0; 1697 } 1698 1699 static int vidioc_streamon(struct file *file, void *priv, 1700 enum v4l2_buf_type type) 1701 { 1702 struct em28xx_fh *fh = priv; 1703 struct em28xx *dev = fh->dev; 1704 int rc = -EINVAL; 1705 1706 rc = check_dev(dev); 1707 if (rc < 0) 1708 return rc; 1709 1710 if (unlikely(type != fh->type)) 1711 return -EINVAL; 1712 1713 em28xx_videodbg("vidioc_streamon fh=%p t=%d fh->res=%d dev->res=%d\n", 1714 fh, type, fh->resources, dev->resources); 1715 1716 if (unlikely(!res_get(fh, get_ressource(fh)))) 1717 return -EBUSY; 1718 1719 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 1720 rc = videobuf_streamon(&fh->vb_vidq); 1721 else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) 1722 rc = videobuf_streamon(&fh->vb_vbiq); 1723 1724 return rc; 1725 } 1726 1727 static int vidioc_streamoff(struct file *file, void *priv, 1728 enum v4l2_buf_type type) 1729 { 1730 struct em28xx_fh *fh = priv; 1731 struct em28xx *dev = fh->dev; 1732 int rc; 1733 1734 rc = check_dev(dev); 1735 if (rc < 0) 1736 return rc; 1737 1738 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1739 fh->type != V4L2_BUF_TYPE_VBI_CAPTURE) 1740 return -EINVAL; 1741 if (type != fh->type) 1742 return -EINVAL; 1743 1744 em28xx_videodbg("vidioc_streamoff fh=%p t=%d fh->res=%d dev->res=%d\n", 1745 fh, type, fh->resources, dev->resources); 1746 1747 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { 1748 if (res_check(fh, EM28XX_RESOURCE_VIDEO)) { 1749 videobuf_streamoff(&fh->vb_vidq); 1750 res_free(fh, EM28XX_RESOURCE_VIDEO); 1751 } 1752 } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) { 1753 if (res_check(fh, EM28XX_RESOURCE_VBI)) { 1754 videobuf_streamoff(&fh->vb_vbiq); 1755 res_free(fh, EM28XX_RESOURCE_VBI); 1756 } 1757 } 1758 1759 return 0; 1760 } 1761 1762 static int vidioc_querycap(struct file *file, void *priv, 1763 struct v4l2_capability *cap) 1764 { 1765 struct em28xx_fh *fh = priv; 1766 struct em28xx *dev = fh->dev; 1767 1768 strlcpy(cap->driver, "em28xx", sizeof(cap->driver)); 1769 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card)); 1770 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); 1771 1772 cap->capabilities = 1773 V4L2_CAP_SLICED_VBI_CAPTURE | 1774 V4L2_CAP_VIDEO_CAPTURE | 1775 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; 1776 1777 if (dev->vbi_dev) 1778 cap->capabilities |= V4L2_CAP_VBI_CAPTURE; 1779 1780 if (dev->audio_mode.has_audio) 1781 cap->capabilities |= V4L2_CAP_AUDIO; 1782 1783 if (dev->tuner_type != TUNER_ABSENT) 1784 cap->capabilities |= V4L2_CAP_TUNER; 1785 1786 return 0; 1787 } 1788 1789 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 1790 struct v4l2_fmtdesc *f) 1791 { 1792 if (unlikely(f->index >= ARRAY_SIZE(format))) 1793 return -EINVAL; 1794 1795 strlcpy(f->description, format[f->index].name, sizeof(f->description)); 1796 f->pixelformat = format[f->index].fourcc; 1797 1798 return 0; 1799 } 1800 1801 static int vidioc_enum_framesizes(struct file *file, void *priv, 1802 struct v4l2_frmsizeenum *fsize) 1803 { 1804 struct em28xx_fh *fh = priv; 1805 struct em28xx *dev = fh->dev; 1806 struct em28xx_fmt *fmt; 1807 unsigned int maxw = norm_maxw(dev); 1808 unsigned int maxh = norm_maxh(dev); 1809 1810 fmt = format_by_fourcc(fsize->pixel_format); 1811 if (!fmt) { 1812 em28xx_videodbg("Fourcc format (%08x) invalid.\n", 1813 fsize->pixel_format); 1814 return -EINVAL; 1815 } 1816 1817 if (dev->board.is_em2800) { 1818 if (fsize->index > 1) 1819 return -EINVAL; 1820 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 1821 fsize->discrete.width = maxw / (1 + fsize->index); 1822 fsize->discrete.height = maxh / (1 + fsize->index); 1823 return 0; 1824 } 1825 1826 if (fsize->index != 0) 1827 return -EINVAL; 1828 1829 /* Report a continuous range */ 1830 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; 1831 fsize->stepwise.min_width = 48; 1832 fsize->stepwise.min_height = 32; 1833 fsize->stepwise.max_width = maxw; 1834 fsize->stepwise.max_height = maxh; 1835 fsize->stepwise.step_width = 1; 1836 fsize->stepwise.step_height = 1; 1837 return 0; 1838 } 1839 1840 /* Sliced VBI ioctls */ 1841 static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv, 1842 struct v4l2_format *f) 1843 { 1844 struct em28xx_fh *fh = priv; 1845 struct em28xx *dev = fh->dev; 1846 int rc; 1847 1848 rc = check_dev(dev); 1849 if (rc < 0) 1850 return rc; 1851 1852 f->fmt.sliced.service_set = 0; 1853 v4l2_device_call_all(&dev->v4l2_dev, 0, vbi, g_sliced_fmt, &f->fmt.sliced); 1854 1855 if (f->fmt.sliced.service_set == 0) 1856 rc = -EINVAL; 1857 1858 return rc; 1859 } 1860 1861 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv, 1862 struct v4l2_format *f) 1863 { 1864 struct em28xx_fh *fh = priv; 1865 struct em28xx *dev = fh->dev; 1866 int rc; 1867 1868 rc = check_dev(dev); 1869 if (rc < 0) 1870 return rc; 1871 1872 v4l2_device_call_all(&dev->v4l2_dev, 0, vbi, g_sliced_fmt, &f->fmt.sliced); 1873 1874 if (f->fmt.sliced.service_set == 0) 1875 return -EINVAL; 1876 1877 return 0; 1878 } 1879 1880 /* RAW VBI ioctls */ 1881 1882 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv, 1883 struct v4l2_format *format) 1884 { 1885 struct em28xx_fh *fh = priv; 1886 struct em28xx *dev = fh->dev; 1887 1888 format->fmt.vbi.samples_per_line = dev->vbi_width; 1889 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; 1890 format->fmt.vbi.offset = 0; 1891 format->fmt.vbi.flags = 0; 1892 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2; 1893 format->fmt.vbi.count[0] = dev->vbi_height; 1894 format->fmt.vbi.count[1] = dev->vbi_height; 1895 1896 /* Varies by video standard (NTSC, PAL, etc.) */ 1897 if (dev->norm & V4L2_STD_525_60) { 1898 /* NTSC */ 1899 format->fmt.vbi.start[0] = 10; 1900 format->fmt.vbi.start[1] = 273; 1901 } else if (dev->norm & V4L2_STD_625_50) { 1902 /* PAL */ 1903 format->fmt.vbi.start[0] = 6; 1904 format->fmt.vbi.start[1] = 318; 1905 } 1906 1907 return 0; 1908 } 1909 1910 static int vidioc_s_fmt_vbi_cap(struct file *file, void *priv, 1911 struct v4l2_format *format) 1912 { 1913 struct em28xx_fh *fh = priv; 1914 struct em28xx *dev = fh->dev; 1915 1916 format->fmt.vbi.samples_per_line = dev->vbi_width; 1917 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; 1918 format->fmt.vbi.offset = 0; 1919 format->fmt.vbi.flags = 0; 1920 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2; 1921 format->fmt.vbi.count[0] = dev->vbi_height; 1922 format->fmt.vbi.count[1] = dev->vbi_height; 1923 1924 /* Varies by video standard (NTSC, PAL, etc.) */ 1925 if (dev->norm & V4L2_STD_525_60) { 1926 /* NTSC */ 1927 format->fmt.vbi.start[0] = 10; 1928 format->fmt.vbi.start[1] = 273; 1929 } else if (dev->norm & V4L2_STD_625_50) { 1930 /* PAL */ 1931 format->fmt.vbi.start[0] = 6; 1932 format->fmt.vbi.start[1] = 318; 1933 } 1934 1935 return 0; 1936 } 1937 1938 static int vidioc_reqbufs(struct file *file, void *priv, 1939 struct v4l2_requestbuffers *rb) 1940 { 1941 struct em28xx_fh *fh = priv; 1942 struct em28xx *dev = fh->dev; 1943 int rc; 1944 1945 rc = check_dev(dev); 1946 if (rc < 0) 1947 return rc; 1948 1949 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 1950 return videobuf_reqbufs(&fh->vb_vidq, rb); 1951 else 1952 return videobuf_reqbufs(&fh->vb_vbiq, rb); 1953 } 1954 1955 static int vidioc_querybuf(struct file *file, void *priv, 1956 struct v4l2_buffer *b) 1957 { 1958 struct em28xx_fh *fh = priv; 1959 struct em28xx *dev = fh->dev; 1960 int rc; 1961 1962 rc = check_dev(dev); 1963 if (rc < 0) 1964 return rc; 1965 1966 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 1967 return videobuf_querybuf(&fh->vb_vidq, b); 1968 else { 1969 /* FIXME: I'm not sure yet whether this is a bug in zvbi or 1970 the videobuf framework, but we probably shouldn't be 1971 returning a buffer larger than that which was asked for. 1972 At a minimum, it causes a crash in zvbi since it does 1973 a memcpy based on the source buffer length */ 1974 int result = videobuf_querybuf(&fh->vb_vbiq, b); 1975 b->length = dev->vbi_width * dev->vbi_height * 2; 1976 1977 return result; 1978 } 1979 } 1980 1981 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b) 1982 { 1983 struct em28xx_fh *fh = priv; 1984 struct em28xx *dev = fh->dev; 1985 int rc; 1986 1987 rc = check_dev(dev); 1988 if (rc < 0) 1989 return rc; 1990 1991 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 1992 return videobuf_qbuf(&fh->vb_vidq, b); 1993 else 1994 return videobuf_qbuf(&fh->vb_vbiq, b); 1995 } 1996 1997 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b) 1998 { 1999 struct em28xx_fh *fh = priv; 2000 struct em28xx *dev = fh->dev; 2001 int rc; 2002 2003 rc = check_dev(dev); 2004 if (rc < 0) 2005 return rc; 2006 2007 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 2008 return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags & 2009 O_NONBLOCK); 2010 else 2011 return videobuf_dqbuf(&fh->vb_vbiq, b, file->f_flags & 2012 O_NONBLOCK); 2013 } 2014 2015 /* ----------------------------------------------------------- */ 2016 /* RADIO ESPECIFIC IOCTLS */ 2017 /* ----------------------------------------------------------- */ 2018 2019 static int radio_querycap(struct file *file, void *priv, 2020 struct v4l2_capability *cap) 2021 { 2022 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev; 2023 2024 strlcpy(cap->driver, "em28xx", sizeof(cap->driver)); 2025 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card)); 2026 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); 2027 2028 cap->capabilities = V4L2_CAP_TUNER; 2029 return 0; 2030 } 2031 2032 static int radio_g_tuner(struct file *file, void *priv, 2033 struct v4l2_tuner *t) 2034 { 2035 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev; 2036 2037 if (unlikely(t->index > 0)) 2038 return -EINVAL; 2039 2040 strcpy(t->name, "Radio"); 2041 t->type = V4L2_TUNER_RADIO; 2042 2043 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t); 2044 2045 return 0; 2046 } 2047 2048 static int radio_enum_input(struct file *file, void *priv, 2049 struct v4l2_input *i) 2050 { 2051 if (i->index != 0) 2052 return -EINVAL; 2053 strcpy(i->name, "Radio"); 2054 i->type = V4L2_INPUT_TYPE_TUNER; 2055 2056 return 0; 2057 } 2058 2059 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a) 2060 { 2061 if (unlikely(a->index)) 2062 return -EINVAL; 2063 2064 strcpy(a->name, "Radio"); 2065 return 0; 2066 } 2067 2068 static int radio_s_tuner(struct file *file, void *priv, 2069 struct v4l2_tuner *t) 2070 { 2071 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev; 2072 2073 if (0 != t->index) 2074 return -EINVAL; 2075 2076 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t); 2077 2078 return 0; 2079 } 2080 2081 static int radio_s_audio(struct file *file, void *fh, 2082 const struct v4l2_audio *a) 2083 { 2084 return 0; 2085 } 2086 2087 static int radio_s_input(struct file *file, void *fh, unsigned int i) 2088 { 2089 return 0; 2090 } 2091 2092 static int radio_queryctrl(struct file *file, void *priv, 2093 struct v4l2_queryctrl *qc) 2094 { 2095 int i; 2096 2097 if (qc->id < V4L2_CID_BASE || 2098 qc->id >= V4L2_CID_LASTP1) 2099 return -EINVAL; 2100 2101 for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) { 2102 if (qc->id && qc->id == ac97_qctrl[i].id) { 2103 memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc)); 2104 return 0; 2105 } 2106 } 2107 2108 return -EINVAL; 2109 } 2110 2111 /* 2112 * em28xx_v4l2_open() 2113 * inits the device and starts isoc transfer 2114 */ 2115 static int em28xx_v4l2_open(struct file *filp) 2116 { 2117 int errCode = 0, radio = 0; 2118 struct video_device *vdev = video_devdata(filp); 2119 struct em28xx *dev = video_drvdata(filp); 2120 enum v4l2_buf_type fh_type = 0; 2121 struct em28xx_fh *fh; 2122 enum v4l2_field field; 2123 2124 switch (vdev->vfl_type) { 2125 case VFL_TYPE_GRABBER: 2126 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2127 break; 2128 case VFL_TYPE_VBI: 2129 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE; 2130 break; 2131 case VFL_TYPE_RADIO: 2132 radio = 1; 2133 break; 2134 } 2135 2136 em28xx_videodbg("open dev=%s type=%s users=%d\n", 2137 video_device_node_name(vdev), v4l2_type_names[fh_type], 2138 dev->users); 2139 2140 2141 if (mutex_lock_interruptible(&dev->lock)) 2142 return -ERESTARTSYS; 2143 fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL); 2144 if (!fh) { 2145 em28xx_errdev("em28xx-video.c: Out of memory?!\n"); 2146 mutex_unlock(&dev->lock); 2147 return -ENOMEM; 2148 } 2149 fh->dev = dev; 2150 fh->radio = radio; 2151 fh->type = fh_type; 2152 filp->private_data = fh; 2153 2154 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) { 2155 em28xx_set_mode(dev, EM28XX_ANALOG_MODE); 2156 em28xx_set_alternate(dev); 2157 em28xx_resolution_set(dev); 2158 2159 /* Needed, since GPIO might have disabled power of 2160 some i2c device 2161 */ 2162 em28xx_wake_i2c(dev); 2163 2164 } 2165 if (fh->radio) { 2166 em28xx_videodbg("video_open: setting radio device\n"); 2167 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_radio); 2168 } 2169 2170 dev->users++; 2171 2172 if (dev->progressive) 2173 field = V4L2_FIELD_NONE; 2174 else 2175 field = V4L2_FIELD_INTERLACED; 2176 2177 videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops, 2178 NULL, &dev->slock, 2179 V4L2_BUF_TYPE_VIDEO_CAPTURE, field, 2180 sizeof(struct em28xx_buffer), fh, &dev->lock); 2181 2182 videobuf_queue_vmalloc_init(&fh->vb_vbiq, &em28xx_vbi_qops, 2183 NULL, &dev->slock, 2184 V4L2_BUF_TYPE_VBI_CAPTURE, 2185 V4L2_FIELD_SEQ_TB, 2186 sizeof(struct em28xx_buffer), fh, &dev->lock); 2187 mutex_unlock(&dev->lock); 2188 2189 return errCode; 2190 } 2191 2192 /* 2193 * em28xx_realease_resources() 2194 * unregisters the v4l2,i2c and usb devices 2195 * called when the device gets disconected or at module unload 2196 */ 2197 void em28xx_release_analog_resources(struct em28xx *dev) 2198 { 2199 2200 /*FIXME: I2C IR should be disconnected */ 2201 2202 if (dev->radio_dev) { 2203 if (video_is_registered(dev->radio_dev)) 2204 video_unregister_device(dev->radio_dev); 2205 else 2206 video_device_release(dev->radio_dev); 2207 dev->radio_dev = NULL; 2208 } 2209 if (dev->vbi_dev) { 2210 em28xx_info("V4L2 device %s deregistered\n", 2211 video_device_node_name(dev->vbi_dev)); 2212 if (video_is_registered(dev->vbi_dev)) 2213 video_unregister_device(dev->vbi_dev); 2214 else 2215 video_device_release(dev->vbi_dev); 2216 dev->vbi_dev = NULL; 2217 } 2218 if (dev->vdev) { 2219 em28xx_info("V4L2 device %s deregistered\n", 2220 video_device_node_name(dev->vdev)); 2221 if (video_is_registered(dev->vdev)) 2222 video_unregister_device(dev->vdev); 2223 else 2224 video_device_release(dev->vdev); 2225 dev->vdev = NULL; 2226 } 2227 } 2228 2229 /* 2230 * em28xx_v4l2_close() 2231 * stops streaming and deallocates all resources allocated by the v4l2 2232 * calls and ioctls 2233 */ 2234 static int em28xx_v4l2_close(struct file *filp) 2235 { 2236 struct em28xx_fh *fh = filp->private_data; 2237 struct em28xx *dev = fh->dev; 2238 int errCode; 2239 2240 em28xx_videodbg("users=%d\n", dev->users); 2241 2242 mutex_lock(&dev->lock); 2243 if (res_check(fh, EM28XX_RESOURCE_VIDEO)) { 2244 videobuf_stop(&fh->vb_vidq); 2245 res_free(fh, EM28XX_RESOURCE_VIDEO); 2246 } 2247 2248 if (res_check(fh, EM28XX_RESOURCE_VBI)) { 2249 videobuf_stop(&fh->vb_vbiq); 2250 res_free(fh, EM28XX_RESOURCE_VBI); 2251 } 2252 2253 if (dev->users == 1) { 2254 /* the device is already disconnect, 2255 free the remaining resources */ 2256 if (dev->state & DEV_DISCONNECTED) { 2257 em28xx_release_resources(dev); 2258 kfree(dev->alt_max_pkt_size); 2259 mutex_unlock(&dev->lock); 2260 kfree(dev); 2261 kfree(fh); 2262 return 0; 2263 } 2264 2265 /* Save some power by putting tuner to sleep */ 2266 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_power, 0); 2267 2268 /* do this before setting alternate! */ 2269 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); 2270 em28xx_set_mode(dev, EM28XX_SUSPEND); 2271 2272 /* set alternate 0 */ 2273 dev->alt = 0; 2274 em28xx_videodbg("setting alternate 0\n"); 2275 errCode = usb_set_interface(dev->udev, 0, 0); 2276 if (errCode < 0) { 2277 em28xx_errdev("cannot change alternate number to " 2278 "0 (error=%i)\n", errCode); 2279 } 2280 } 2281 2282 videobuf_mmap_free(&fh->vb_vidq); 2283 videobuf_mmap_free(&fh->vb_vbiq); 2284 kfree(fh); 2285 dev->users--; 2286 mutex_unlock(&dev->lock); 2287 return 0; 2288 } 2289 2290 /* 2291 * em28xx_v4l2_read() 2292 * will allocate buffers when called for the first time 2293 */ 2294 static ssize_t 2295 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count, 2296 loff_t *pos) 2297 { 2298 struct em28xx_fh *fh = filp->private_data; 2299 struct em28xx *dev = fh->dev; 2300 int rc; 2301 2302 rc = check_dev(dev); 2303 if (rc < 0) 2304 return rc; 2305 2306 if (mutex_lock_interruptible(&dev->lock)) 2307 return -ERESTARTSYS; 2308 /* FIXME: read() is not prepared to allow changing the video 2309 resolution while streaming. Seems a bug at em28xx_set_fmt 2310 */ 2311 2312 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { 2313 if (res_locked(dev, EM28XX_RESOURCE_VIDEO)) 2314 rc = -EBUSY; 2315 else 2316 rc = videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0, 2317 filp->f_flags & O_NONBLOCK); 2318 } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) { 2319 if (!res_get(fh, EM28XX_RESOURCE_VBI)) 2320 rc = -EBUSY; 2321 else 2322 rc = videobuf_read_stream(&fh->vb_vbiq, buf, count, pos, 0, 2323 filp->f_flags & O_NONBLOCK); 2324 } 2325 mutex_unlock(&dev->lock); 2326 2327 return rc; 2328 } 2329 2330 /* 2331 * em28xx_poll() 2332 * will allocate buffers when called for the first time 2333 */ 2334 static unsigned int em28xx_poll(struct file *filp, poll_table *wait) 2335 { 2336 struct em28xx_fh *fh = filp->private_data; 2337 struct em28xx *dev = fh->dev; 2338 int rc; 2339 2340 rc = check_dev(dev); 2341 if (rc < 0) 2342 return rc; 2343 2344 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { 2345 if (!res_get(fh, EM28XX_RESOURCE_VIDEO)) 2346 return POLLERR; 2347 return videobuf_poll_stream(filp, &fh->vb_vidq, wait); 2348 } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) { 2349 if (!res_get(fh, EM28XX_RESOURCE_VBI)) 2350 return POLLERR; 2351 return videobuf_poll_stream(filp, &fh->vb_vbiq, wait); 2352 } else { 2353 return POLLERR; 2354 } 2355 } 2356 2357 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table *wait) 2358 { 2359 struct em28xx_fh *fh = filp->private_data; 2360 struct em28xx *dev = fh->dev; 2361 unsigned int res; 2362 2363 mutex_lock(&dev->lock); 2364 res = em28xx_poll(filp, wait); 2365 mutex_unlock(&dev->lock); 2366 return res; 2367 } 2368 2369 /* 2370 * em28xx_v4l2_mmap() 2371 */ 2372 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma) 2373 { 2374 struct em28xx_fh *fh = filp->private_data; 2375 struct em28xx *dev = fh->dev; 2376 int rc; 2377 2378 rc = check_dev(dev); 2379 if (rc < 0) 2380 return rc; 2381 2382 if (mutex_lock_interruptible(&dev->lock)) 2383 return -ERESTARTSYS; 2384 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 2385 rc = videobuf_mmap_mapper(&fh->vb_vidq, vma); 2386 else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) 2387 rc = videobuf_mmap_mapper(&fh->vb_vbiq, vma); 2388 mutex_unlock(&dev->lock); 2389 2390 em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n", 2391 (unsigned long)vma->vm_start, 2392 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start, 2393 rc); 2394 2395 return rc; 2396 } 2397 2398 static const struct v4l2_file_operations em28xx_v4l_fops = { 2399 .owner = THIS_MODULE, 2400 .open = em28xx_v4l2_open, 2401 .release = em28xx_v4l2_close, 2402 .read = em28xx_v4l2_read, 2403 .poll = em28xx_v4l2_poll, 2404 .mmap = em28xx_v4l2_mmap, 2405 .unlocked_ioctl = video_ioctl2, 2406 }; 2407 2408 static const struct v4l2_ioctl_ops video_ioctl_ops = { 2409 .vidioc_querycap = vidioc_querycap, 2410 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 2411 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 2412 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 2413 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 2414 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 2415 .vidioc_s_fmt_vbi_cap = vidioc_s_fmt_vbi_cap, 2416 .vidioc_enum_framesizes = vidioc_enum_framesizes, 2417 .vidioc_g_audio = vidioc_g_audio, 2418 .vidioc_s_audio = vidioc_s_audio, 2419 .vidioc_cropcap = vidioc_cropcap, 2420 .vidioc_g_fmt_sliced_vbi_cap = vidioc_g_fmt_sliced_vbi_cap, 2421 .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap, 2422 .vidioc_s_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap, 2423 2424 .vidioc_reqbufs = vidioc_reqbufs, 2425 .vidioc_querybuf = vidioc_querybuf, 2426 .vidioc_qbuf = vidioc_qbuf, 2427 .vidioc_dqbuf = vidioc_dqbuf, 2428 .vidioc_g_std = vidioc_g_std, 2429 .vidioc_querystd = vidioc_querystd, 2430 .vidioc_s_std = vidioc_s_std, 2431 .vidioc_g_parm = vidioc_g_parm, 2432 .vidioc_s_parm = vidioc_s_parm, 2433 .vidioc_enum_input = vidioc_enum_input, 2434 .vidioc_g_input = vidioc_g_input, 2435 .vidioc_s_input = vidioc_s_input, 2436 .vidioc_queryctrl = vidioc_queryctrl, 2437 .vidioc_g_ctrl = vidioc_g_ctrl, 2438 .vidioc_s_ctrl = vidioc_s_ctrl, 2439 .vidioc_streamon = vidioc_streamon, 2440 .vidioc_streamoff = vidioc_streamoff, 2441 .vidioc_g_tuner = vidioc_g_tuner, 2442 .vidioc_s_tuner = vidioc_s_tuner, 2443 .vidioc_g_frequency = vidioc_g_frequency, 2444 .vidioc_s_frequency = vidioc_s_frequency, 2445 #ifdef CONFIG_VIDEO_ADV_DEBUG 2446 .vidioc_g_register = vidioc_g_register, 2447 .vidioc_s_register = vidioc_s_register, 2448 .vidioc_g_chip_ident = vidioc_g_chip_ident, 2449 #endif 2450 }; 2451 2452 static const struct video_device em28xx_video_template = { 2453 .fops = &em28xx_v4l_fops, 2454 .release = video_device_release, 2455 .ioctl_ops = &video_ioctl_ops, 2456 2457 .tvnorms = V4L2_STD_ALL, 2458 .current_norm = V4L2_STD_PAL, 2459 }; 2460 2461 static const struct v4l2_file_operations radio_fops = { 2462 .owner = THIS_MODULE, 2463 .open = em28xx_v4l2_open, 2464 .release = em28xx_v4l2_close, 2465 .unlocked_ioctl = video_ioctl2, 2466 }; 2467 2468 static const struct v4l2_ioctl_ops radio_ioctl_ops = { 2469 .vidioc_querycap = radio_querycap, 2470 .vidioc_g_tuner = radio_g_tuner, 2471 .vidioc_enum_input = radio_enum_input, 2472 .vidioc_g_audio = radio_g_audio, 2473 .vidioc_s_tuner = radio_s_tuner, 2474 .vidioc_s_audio = radio_s_audio, 2475 .vidioc_s_input = radio_s_input, 2476 .vidioc_queryctrl = radio_queryctrl, 2477 .vidioc_g_ctrl = vidioc_g_ctrl, 2478 .vidioc_s_ctrl = vidioc_s_ctrl, 2479 .vidioc_g_frequency = vidioc_g_frequency, 2480 .vidioc_s_frequency = vidioc_s_frequency, 2481 #ifdef CONFIG_VIDEO_ADV_DEBUG 2482 .vidioc_g_register = vidioc_g_register, 2483 .vidioc_s_register = vidioc_s_register, 2484 #endif 2485 }; 2486 2487 static struct video_device em28xx_radio_template = { 2488 .name = "em28xx-radio", 2489 .fops = &radio_fops, 2490 .ioctl_ops = &radio_ioctl_ops, 2491 }; 2492 2493 /******************************** usb interface ******************************/ 2494 2495 2496 2497 static struct video_device *em28xx_vdev_init(struct em28xx *dev, 2498 const struct video_device *template, 2499 const char *type_name) 2500 { 2501 struct video_device *vfd; 2502 2503 vfd = video_device_alloc(); 2504 if (NULL == vfd) 2505 return NULL; 2506 2507 *vfd = *template; 2508 vfd->v4l2_dev = &dev->v4l2_dev; 2509 vfd->release = video_device_release; 2510 vfd->debug = video_debug; 2511 vfd->lock = &dev->lock; 2512 2513 snprintf(vfd->name, sizeof(vfd->name), "%s %s", 2514 dev->name, type_name); 2515 2516 video_set_drvdata(vfd, dev); 2517 return vfd; 2518 } 2519 2520 int em28xx_register_analog_devices(struct em28xx *dev) 2521 { 2522 u8 val; 2523 int ret; 2524 unsigned int maxw; 2525 2526 printk(KERN_INFO "%s: v4l2 driver version %s\n", 2527 dev->name, EM28XX_VERSION); 2528 2529 /* set default norm */ 2530 dev->norm = em28xx_video_template.current_norm; 2531 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm); 2532 dev->interlaced = EM28XX_INTERLACED_DEFAULT; 2533 2534 /* Analog specific initialization */ 2535 dev->format = &format[0]; 2536 2537 maxw = norm_maxw(dev); 2538 /* MaxPacketSize for em2800 is too small to capture at full resolution 2539 * use half of maxw as the scaler can only scale to 50% */ 2540 if (dev->board.is_em2800) 2541 maxw /= 2; 2542 2543 em28xx_set_video_format(dev, format[0].fourcc, 2544 maxw, norm_maxh(dev)); 2545 2546 video_mux(dev, 0); 2547 2548 /* Audio defaults */ 2549 dev->mute = 1; 2550 dev->volume = 0x1f; 2551 2552 /* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */ 2553 val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK); 2554 em28xx_write_reg(dev, EM28XX_R0F_XCLK, 2555 (EM28XX_XCLK_AUDIO_UNMUTE | val)); 2556 2557 em28xx_set_outfmt(dev); 2558 em28xx_colorlevels_set_default(dev); 2559 em28xx_compression_disable(dev); 2560 2561 /* allocate and fill video video_device struct */ 2562 dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video"); 2563 if (!dev->vdev) { 2564 em28xx_errdev("cannot allocate video_device.\n"); 2565 return -ENODEV; 2566 } 2567 2568 /* register v4l2 video video_device */ 2569 ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER, 2570 video_nr[dev->devno]); 2571 if (ret) { 2572 em28xx_errdev("unable to register video device (error=%i).\n", 2573 ret); 2574 return ret; 2575 } 2576 2577 /* Allocate and fill vbi video_device struct */ 2578 if (em28xx_vbi_supported(dev) == 1) { 2579 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template, 2580 "vbi"); 2581 2582 /* register v4l2 vbi video_device */ 2583 ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI, 2584 vbi_nr[dev->devno]); 2585 if (ret < 0) { 2586 em28xx_errdev("unable to register vbi device\n"); 2587 return ret; 2588 } 2589 } 2590 2591 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) { 2592 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template, 2593 "radio"); 2594 if (!dev->radio_dev) { 2595 em28xx_errdev("cannot allocate video_device.\n"); 2596 return -ENODEV; 2597 } 2598 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO, 2599 radio_nr[dev->devno]); 2600 if (ret < 0) { 2601 em28xx_errdev("can't register radio device\n"); 2602 return ret; 2603 } 2604 em28xx_info("Registered radio device as %s\n", 2605 video_device_node_name(dev->radio_dev)); 2606 } 2607 2608 em28xx_info("V4L2 video device registered as %s\n", 2609 video_device_node_name(dev->vdev)); 2610 2611 if (dev->vbi_dev) 2612 em28xx_info("V4L2 VBI device registered as %s\n", 2613 video_device_node_name(dev->vbi_dev)); 2614 2615 return 0; 2616 } 2617