em28xx-video.c revision d2d9fbfd732f49999a2a94f2479934488fe3ea9d
1/* 2 em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB video capture devices 3 4 Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> 5 Markus Rechberger <mrechberger@gmail.com> 6 Mauro Carvalho Chehab <mchehab@infradead.org> 7 Sascha Sommer <saschasommer@freenet.de> 8 9 Some parts based on SN9C10x PC Camera Controllers GPL driver made 10 by Luca Risolia <luca.risolia@studio.unibo.it> 11 12 This program is free software; you can redistribute it and/or modify 13 it under the terms of the GNU General Public License as published by 14 the Free Software Foundation; either version 2 of the License, or 15 (at your option) any later version. 16 17 This program is distributed in the hope that it will be useful, 18 but WITHOUT ANY WARRANTY; without even the implied warranty of 19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 GNU General Public License for more details. 21 22 You should have received a copy of the GNU General Public License 23 along with this program; if not, write to the Free Software 24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 25 */ 26 27#include <linux/init.h> 28#include <linux/list.h> 29#include <linux/module.h> 30#include <linux/kernel.h> 31#include <linux/bitmap.h> 32#include <linux/usb.h> 33#include <linux/i2c.h> 34#include <linux/version.h> 35#include <linux/mm.h> 36#include <linux/mutex.h> 37 38#include "em28xx.h" 39#include <media/v4l2-common.h> 40#include <media/msp3400.h> 41#include <media/tuner.h> 42 43#define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \ 44 "Markus Rechberger <mrechberger@gmail.com>, " \ 45 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \ 46 "Sascha Sommer <saschasommer@freenet.de>" 47 48#define DRIVER_NAME "em28xx" 49#define DRIVER_DESC "Empia em28xx based USB video device driver" 50#define EM28XX_VERSION_CODE KERNEL_VERSION(0, 1, 0) 51 52#define em28xx_videodbg(fmt, arg...) do {\ 53 if (video_debug) \ 54 printk(KERN_INFO "%s %s :"fmt, \ 55 dev->name, __func__ , ##arg); } while (0) 56 57static unsigned int isoc_debug; 58module_param(isoc_debug, int, 0644); 59MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]"); 60 61#define em28xx_isocdbg(fmt, arg...) do {\ 62 if (isoc_debug) \ 63 printk(KERN_INFO "%s %s :"fmt, \ 64 dev->name, __func__ , ##arg); } while (0) 65 66MODULE_AUTHOR(DRIVER_AUTHOR); 67MODULE_DESCRIPTION(DRIVER_DESC); 68MODULE_LICENSE("GPL"); 69 70static LIST_HEAD(em28xx_devlist); 71 72static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; 73static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; 74static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; 75static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; 76 77module_param_array(card, int, NULL, 0444); 78module_param_array(video_nr, int, NULL, 0444); 79module_param_array(vbi_nr, int, NULL, 0444); 80module_param_array(radio_nr, int, NULL, 0444); 81MODULE_PARM_DESC(card, "card type"); 82MODULE_PARM_DESC(video_nr, "video device numbers"); 83MODULE_PARM_DESC(vbi_nr, "vbi device numbers"); 84MODULE_PARM_DESC(radio_nr, "radio device numbers"); 85 86static unsigned int video_debug; 87module_param(video_debug,int,0644); 88MODULE_PARM_DESC(video_debug,"enable debug messages [video]"); 89 90/* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */ 91static unsigned long em28xx_devused; 92 93/* supported controls */ 94/* Common to all boards */ 95static struct v4l2_queryctrl em28xx_qctrl[] = { 96 { 97 .id = V4L2_CID_AUDIO_VOLUME, 98 .type = V4L2_CTRL_TYPE_INTEGER, 99 .name = "Volume", 100 .minimum = 0x0, 101 .maximum = 0x1f, 102 .step = 0x1, 103 .default_value = 0x1f, 104 .flags = 0, 105 },{ 106 .id = V4L2_CID_AUDIO_MUTE, 107 .type = V4L2_CTRL_TYPE_BOOLEAN, 108 .name = "Mute", 109 .minimum = 0, 110 .maximum = 1, 111 .step = 1, 112 .default_value = 1, 113 .flags = 0, 114 } 115}; 116 117static struct usb_driver em28xx_usb_driver; 118 119/* ------------------------------------------------------------------ 120 DMA and thread functions 121 ------------------------------------------------------------------*/ 122 123/* 124 * Announces that a buffer were filled and request the next 125 */ 126static inline void buffer_filled(struct em28xx *dev, 127 struct em28xx_dmaqueue *dma_q, 128 struct em28xx_buffer *buf) 129{ 130 /* Advice that buffer was filled */ 131 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i); 132 buf->vb.state = VIDEOBUF_DONE; 133 buf->vb.field_count++; 134 do_gettimeofday(&buf->vb.ts); 135 136 dev->isoc_ctl.buf = NULL; 137 138 list_del(&buf->vb.queue); 139 wake_up(&buf->vb.done); 140} 141 142/* 143 * Identify the buffer header type and properly handles 144 */ 145static void em28xx_copy_video(struct em28xx *dev, 146 struct em28xx_dmaqueue *dma_q, 147 struct em28xx_buffer *buf, 148 unsigned char *p, 149 unsigned char *outp, unsigned long len) 150{ 151 void *fieldstart, *startwrite, *startread; 152 int linesdone, currlinedone, offset, lencopy, remain; 153 int bytesperline = dev->width << 1; 154 155 if (dma_q->pos + len > buf->vb.size) 156 len = buf->vb.size - dma_q->pos; 157 158 if (p[0] != 0x88 && p[0] != 0x22) { 159 em28xx_isocdbg("frame is not complete\n"); 160 len += 4; 161 } else 162 p += 4; 163 164 startread = p; 165 remain = len; 166 167 /* Interlaces frame */ 168 if (buf->top_field) 169 fieldstart = outp; 170 else 171 fieldstart = outp + bytesperline; 172 173 linesdone = dma_q->pos / bytesperline; 174 currlinedone = dma_q->pos % bytesperline; 175 offset = linesdone * bytesperline * 2 + currlinedone; 176 startwrite = fieldstart + offset; 177 lencopy = bytesperline - currlinedone; 178 lencopy = lencopy > remain ? remain : lencopy; 179 180 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) { 181 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n", 182 ((char *)startwrite + lencopy) - 183 ((char *)outp + buf->vb.size)); 184 lencopy = remain = (char *)outp + buf->vb.size - (char *)startwrite; 185 } 186 if (lencopy <= 0) 187 return; 188 memcpy(startwrite, startread, lencopy); 189 190 remain -= lencopy; 191 192 while (remain > 0) { 193 startwrite += lencopy + bytesperline; 194 startread += lencopy; 195 if (bytesperline > remain) 196 lencopy = remain; 197 else 198 lencopy = bytesperline; 199 200 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) { 201 em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n", 202 ((char *)startwrite + lencopy) - 203 ((char *)outp + buf->vb.size)); 204 lencopy = remain = (char *)outp + buf->vb.size - 205 (char *)startwrite; 206 } 207 if (lencopy <= 0) 208 break; 209 210 memcpy(startwrite, startread, lencopy); 211 212 remain -= lencopy; 213 } 214 215 dma_q->pos += len; 216} 217 218static inline void print_err_status(struct em28xx *dev, 219 int packet, int status) 220{ 221 char *errmsg = "Unknown"; 222 223 switch (status) { 224 case -ENOENT: 225 errmsg = "unlinked synchronuously"; 226 break; 227 case -ECONNRESET: 228 errmsg = "unlinked asynchronuously"; 229 break; 230 case -ENOSR: 231 errmsg = "Buffer error (overrun)"; 232 break; 233 case -EPIPE: 234 errmsg = "Stalled (device not responding)"; 235 break; 236 case -EOVERFLOW: 237 errmsg = "Babble (bad cable?)"; 238 break; 239 case -EPROTO: 240 errmsg = "Bit-stuff error (bad cable?)"; 241 break; 242 case -EILSEQ: 243 errmsg = "CRC/Timeout (could be anything)"; 244 break; 245 case -ETIME: 246 errmsg = "Device does not respond"; 247 break; 248 } 249 if (packet < 0) { 250 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg); 251 } else { 252 em28xx_isocdbg("URB packet %d, status %d [%s].\n", 253 packet, status, errmsg); 254 } 255} 256 257/* 258 * video-buf generic routine to get the next available buffer 259 */ 260static inline void get_next_buf(struct em28xx_dmaqueue *dma_q, 261 struct em28xx_buffer **buf) 262{ 263 struct em28xx *dev = container_of(dma_q, struct em28xx, vidq); 264 char *outp; 265 266 if (list_empty(&dma_q->active)) { 267 em28xx_isocdbg("No active queue to serve\n"); 268 dev->isoc_ctl.buf = NULL; 269 *buf = NULL; 270 return; 271 } 272 273 /* Get the next buffer */ 274 *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue); 275 276 /* Cleans up buffer - Usefull for testing for frame/URB loss */ 277 outp = videobuf_to_vmalloc(&(*buf)->vb); 278 memset(outp, 0, (*buf)->vb.size); 279 280 dev->isoc_ctl.buf = *buf; 281 282 return; 283} 284 285/* 286 * Controls the isoc copy of each urb packet 287 */ 288static inline int em28xx_isoc_copy(struct urb *urb) 289{ 290 struct em28xx_buffer *buf; 291 struct em28xx_dmaqueue *dma_q = urb->context; 292 struct em28xx *dev = container_of(dma_q, struct em28xx, vidq); 293 unsigned char *outp = NULL; 294 int i, len = 0, rc = 1; 295 unsigned char *p; 296 297 if (!dev) 298 return 0; 299 300 if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED)) 301 return 0; 302 303 if (urb->status < 0) { 304 print_err_status(dev, -1, urb->status); 305 if (urb->status == -ENOENT) 306 return 0; 307 } 308 309 buf = dev->isoc_ctl.buf; 310 if (buf != NULL) 311 outp = videobuf_to_vmalloc(&buf->vb); 312 313 for (i = 0; i < urb->number_of_packets; i++) { 314 int status = urb->iso_frame_desc[i].status; 315 316 if (status < 0) { 317 print_err_status(dev, i, status); 318 if (urb->iso_frame_desc[i].status != -EPROTO) 319 continue; 320 } 321 322 len = urb->iso_frame_desc[i].actual_length - 4; 323 324 if (urb->iso_frame_desc[i].actual_length <= 0) { 325 /* em28xx_isocdbg("packet %d is empty",i); - spammy */ 326 continue; 327 } 328 if (urb->iso_frame_desc[i].actual_length > 329 dev->max_pkt_size) { 330 em28xx_isocdbg("packet bigger than packet size"); 331 continue; 332 } 333 334 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset; 335 336 /* FIXME: incomplete buffer checks where removed to make 337 logic simpler. Impacts of those changes should be evaluated 338 */ 339 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) { 340 em28xx_isocdbg("VBI HEADER!!!\n"); 341 /* FIXME: Should add vbi copy */ 342 continue; 343 } 344 if (p[0] == 0x22 && p[1] == 0x5a) { 345 em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2], 346 len, (p[2] & 1)? "odd" : "even"); 347 348 if (!(p[2] & 1)) { 349 if (buf != NULL) 350 buffer_filled(dev, dma_q, buf); 351 get_next_buf(dma_q, &buf); 352 if (buf == NULL) 353 outp = NULL; 354 else 355 outp = videobuf_to_vmalloc(&buf->vb); 356 } 357 358 if (buf != NULL) { 359 if (p[2] & 1) 360 buf->top_field = 0; 361 else 362 buf->top_field = 1; 363 } 364 365 dma_q->pos = 0; 366 } 367 if (buf != NULL) 368 em28xx_copy_video(dev, dma_q, buf, p, outp, len); 369 } 370 return rc; 371} 372 373/* ------------------------------------------------------------------ 374 URB control 375 ------------------------------------------------------------------*/ 376 377/* 378 * IRQ callback, called by URB callback 379 */ 380static void em28xx_irq_callback(struct urb *urb) 381{ 382 struct em28xx_dmaqueue *dma_q = urb->context; 383 struct em28xx *dev = container_of(dma_q, struct em28xx, vidq); 384 int rc, i; 385 386 /* Copy data from URB */ 387 spin_lock(&dev->slock); 388 rc = em28xx_isoc_copy(urb); 389 spin_unlock(&dev->slock); 390 391 /* Reset urb buffers */ 392 for (i = 0; i < urb->number_of_packets; i++) { 393 urb->iso_frame_desc[i].status = 0; 394 urb->iso_frame_desc[i].actual_length = 0; 395 } 396 urb->status = 0; 397 398 urb->status = usb_submit_urb(urb, GFP_ATOMIC); 399 if (urb->status) { 400 em28xx_err("urb resubmit failed (error=%i)\n", 401 urb->status); 402 } 403} 404 405/* 406 * Stop and Deallocate URBs 407 */ 408static void em28xx_uninit_isoc(struct em28xx *dev) 409{ 410 struct urb *urb; 411 int i; 412 413 em28xx_isocdbg("em28xx: called em28xx_uninit_isoc\n"); 414 415 dev->isoc_ctl.nfields = -1; 416 for (i = 0; i < dev->isoc_ctl.num_bufs; i++) { 417 urb = dev->isoc_ctl.urb[i]; 418 if (urb) { 419 usb_kill_urb(urb); 420 usb_unlink_urb(urb); 421 if (dev->isoc_ctl.transfer_buffer[i]) { 422 usb_buffer_free(dev->udev, 423 urb->transfer_buffer_length, 424 dev->isoc_ctl.transfer_buffer[i], 425 urb->transfer_dma); 426 } 427 usb_free_urb(urb); 428 dev->isoc_ctl.urb[i] = NULL; 429 } 430 dev->isoc_ctl.transfer_buffer[i] = NULL; 431 } 432 433 kfree(dev->isoc_ctl.urb); 434 kfree(dev->isoc_ctl.transfer_buffer); 435 dev->isoc_ctl.urb = NULL; 436 dev->isoc_ctl.transfer_buffer = NULL; 437 438 dev->isoc_ctl.num_bufs = 0; 439 440 em28xx_capture_start(dev, 0); 441} 442 443/* 444 * Allocate URBs and start IRQ 445 */ 446static int em28xx_prepare_isoc(struct em28xx *dev, int max_packets, 447 int num_bufs) 448{ 449 struct em28xx_dmaqueue *dma_q = &dev->vidq; 450 int i; 451 int sb_size, pipe; 452 struct urb *urb; 453 int j, k; 454 455 em28xx_isocdbg("em28xx: called em28xx_prepare_isoc\n"); 456 457 /* De-allocates all pending stuff */ 458 em28xx_uninit_isoc(dev); 459 460 dev->isoc_ctl.num_bufs = num_bufs; 461 462 dev->isoc_ctl.urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL); 463 if (!dev->isoc_ctl.urb) { 464 em28xx_errdev("cannot alloc memory for usb buffers\n"); 465 return -ENOMEM; 466 } 467 468 dev->isoc_ctl.transfer_buffer = kzalloc(sizeof(void *)*num_bufs, 469 GFP_KERNEL); 470 if (!dev->isoc_ctl.urb) { 471 em28xx_errdev("cannot allocate memory for usbtransfer\n"); 472 kfree(dev->isoc_ctl.urb); 473 return -ENOMEM; 474 } 475 476 dev->isoc_ctl.max_pkt_size = dev->max_pkt_size; 477 dev->isoc_ctl.buf = NULL; 478 479 sb_size = max_packets * dev->isoc_ctl.max_pkt_size; 480 481 /* allocate urbs and transfer buffers */ 482 for (i = 0; i < dev->isoc_ctl.num_bufs; i++) { 483 urb = usb_alloc_urb(max_packets, GFP_KERNEL); 484 if (!urb) { 485 em28xx_err("cannot alloc isoc_ctl.urb %i\n", i); 486 em28xx_uninit_isoc(dev); 487 return -ENOMEM; 488 } 489 dev->isoc_ctl.urb[i] = urb; 490 491 dev->isoc_ctl.transfer_buffer[i] = usb_buffer_alloc(dev->udev, 492 sb_size, GFP_KERNEL, &urb->transfer_dma); 493 if (!dev->isoc_ctl.transfer_buffer[i]) { 494 em28xx_err("unable to allocate %i bytes for transfer" 495 " buffer %i%s\n", 496 sb_size, i, 497 in_interrupt()?" while in int":""); 498 em28xx_uninit_isoc(dev); 499 return -ENOMEM; 500 } 501 memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size); 502 503 /* FIXME: this is a hack - should be 504 'desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK' 505 should also be using 'desc.bInterval' 506 */ 507 pipe = usb_rcvisocpipe(dev->udev, 0x82); 508 usb_fill_int_urb(urb, dev->udev, pipe, 509 dev->isoc_ctl.transfer_buffer[i], sb_size, 510 em28xx_irq_callback, dma_q, 1); 511 512 urb->number_of_packets = max_packets; 513 urb->transfer_flags = URB_ISO_ASAP; 514 515 k = 0; 516 for (j = 0; j < max_packets; j++) { 517 urb->iso_frame_desc[j].offset = k; 518 urb->iso_frame_desc[j].length = 519 dev->isoc_ctl.max_pkt_size; 520 k += dev->isoc_ctl.max_pkt_size; 521 } 522 } 523 524 return 0; 525} 526 527static int em28xx_start_thread(struct em28xx_dmaqueue *dma_q) 528{ 529 struct em28xx *dev = container_of(dma_q, struct em28xx, vidq); 530 int i, rc = 0; 531 532 em28xx_videodbg("Called em28xx_start_thread\n"); 533 534 init_waitqueue_head(&dma_q->wq); 535 536 em28xx_capture_start(dev, 1); 537 538 /* submit urbs and enables IRQ */ 539 for (i = 0; i < dev->isoc_ctl.num_bufs; i++) { 540 rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC); 541 if (rc) { 542 em28xx_err("submit of urb %i failed (error=%i)\n", i, 543 rc); 544 em28xx_uninit_isoc(dev); 545 return rc; 546 } 547 } 548 549 if (rc < 0) 550 return rc; 551 552 return 0; 553} 554 555/* ------------------------------------------------------------------ 556 Videobuf operations 557 ------------------------------------------------------------------*/ 558 559static int 560buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size) 561{ 562 struct em28xx_fh *fh = vq->priv_data; 563 struct em28xx *dev = fh->dev; 564 struct v4l2_frequency f; 565 566 *size = 16 * fh->dev->width * fh->dev->height >> 3; 567 if (0 == *count) 568 *count = EM28XX_DEF_BUF; 569 570 if (*count < EM28XX_MIN_BUF) 571 *count = EM28XX_MIN_BUF; 572 573 dev->mode = EM28XX_ANALOG_MODE; 574 575 /* Ask tuner to go to analog mode */ 576 memset (&f, 0, sizeof(f)); 577 f.frequency = dev->ctl_freq; 578 579 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f); 580 581 return 0; 582} 583 584/* This is called *without* dev->slock held; please keep it that way */ 585static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf) 586{ 587 struct em28xx_fh *fh = vq->priv_data; 588 struct em28xx *dev = fh->dev; 589 unsigned long flags = 0; 590 if (in_interrupt()) 591 BUG(); 592 593 /* We used to wait for the buffer to finish here, but this didn't work 594 because, as we were keeping the state as VIDEOBUF_QUEUED, 595 videobuf_queue_cancel marked it as finished for us. 596 (Also, it could wedge forever if the hardware was misconfigured.) 597 598 This should be safe; by the time we get here, the buffer isn't 599 queued anymore. If we ever start marking the buffers as 600 VIDEOBUF_ACTIVE, it won't be, though. 601 */ 602 spin_lock_irqsave(&dev->slock, flags); 603 if (dev->isoc_ctl.buf == buf) 604 dev->isoc_ctl.buf = NULL; 605 spin_unlock_irqrestore(&dev->slock, flags); 606 607 videobuf_vmalloc_free(&buf->vb); 608 buf->vb.state = VIDEOBUF_NEEDS_INIT; 609} 610 611static int 612buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, 613 enum v4l2_field field) 614{ 615 struct em28xx_fh *fh = vq->priv_data; 616 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); 617 struct em28xx *dev = fh->dev; 618 struct em28xx_dmaqueue *vidq = &dev->vidq; 619 int rc = 0, urb_init = 0; 620 621 /* FIXME: It assumes depth = 16 */ 622 /* The only currently supported format is 16 bits/pixel */ 623 buf->vb.size = 16 * dev->width * dev->height >> 3; 624 625 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size) 626 return -EINVAL; 627 628 buf->vb.width = dev->width; 629 buf->vb.height = dev->height; 630 buf->vb.field = field; 631 632 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { 633 rc = videobuf_iolock(vq, &buf->vb, NULL); 634 if (rc < 0) 635 goto fail; 636 } 637 638 if (!dev->isoc_ctl.num_bufs) 639 urb_init = 1; 640 641 if (urb_init) { 642 rc = em28xx_prepare_isoc(dev, EM28XX_NUM_PACKETS, 643 EM28XX_NUM_BUFS); 644 if (rc < 0) 645 goto fail; 646 647 rc = em28xx_start_thread(vidq); 648 if (rc < 0) 649 goto fail; 650 } 651 652 buf->vb.state = VIDEOBUF_PREPARED; 653 return 0; 654 655fail: 656 free_buffer(vq, buf); 657 return rc; 658} 659 660static void 661buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) 662{ 663 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); 664 struct em28xx_fh *fh = vq->priv_data; 665 struct em28xx *dev = fh->dev; 666 struct em28xx_dmaqueue *vidq = &dev->vidq; 667 668 buf->vb.state = VIDEOBUF_QUEUED; 669 list_add_tail(&buf->vb.queue, &vidq->active); 670 671} 672 673static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb) 674{ 675 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); 676 struct em28xx_fh *fh = vq->priv_data; 677 struct em28xx *dev = (struct em28xx *)fh->dev; 678 679 em28xx_isocdbg("em28xx: called buffer_release\n"); 680 681 free_buffer(vq, buf); 682} 683 684static struct videobuf_queue_ops em28xx_video_qops = { 685 .buf_setup = buffer_setup, 686 .buf_prepare = buffer_prepare, 687 .buf_queue = buffer_queue, 688 .buf_release = buffer_release, 689}; 690 691/********************* v4l2 interface ******************************************/ 692 693/* 694 * em28xx_config() 695 * inits registers with sane defaults 696 */ 697static int em28xx_config(struct em28xx *dev) 698{ 699 700 /* Sets I2C speed to 100 KHz */ 701 if (!dev->is_em2800) 702 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1); 703 704 /* enable vbi capturing */ 705 706/* em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */ 707/* em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */ 708 em28xx_write_regs_req(dev,0x00,0x11,"\x51",1); 709 710 dev->mute = 1; /* maybe not the right place... */ 711 dev->volume = 0x1f; 712 713 em28xx_outfmt_set_yuv422(dev); 714 em28xx_colorlevels_set_default(dev); 715 em28xx_compression_disable(dev); 716 717 return 0; 718} 719 720/* 721 * em28xx_config_i2c() 722 * configure i2c attached devices 723 */ 724static void em28xx_config_i2c(struct em28xx *dev) 725{ 726 struct v4l2_routing route; 727 728 route.input = INPUT(dev->ctl_input)->vmux; 729 route.output = 0; 730 em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL); 731 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route); 732 em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL); 733} 734 735static void video_mux(struct em28xx *dev, int index) 736{ 737 struct v4l2_routing route; 738 739 route.input = INPUT(index)->vmux; 740 route.output = 0; 741 dev->ctl_input = index; 742 dev->ctl_ainput = INPUT(index)->amux; 743 744 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route); 745 746 if (dev->has_msp34xx) { 747 if (dev->i2s_speed) 748 em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed); 749 route.input = dev->ctl_ainput; 750 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1); 751 /* Note: this is msp3400 specific */ 752 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route); 753 } 754 755 em28xx_audio_analog_set(dev); 756} 757 758/* Usage lock check functions */ 759static int res_get(struct em28xx_fh *fh) 760{ 761 struct em28xx *dev = fh->dev; 762 int rc = 0; 763 764 /* This instance already has stream_on */ 765 if (fh->stream_on) 766 return rc; 767 768 if (dev->stream_on) 769 return -EINVAL; 770 771 mutex_lock(&dev->lock); 772 dev->stream_on = 1; 773 fh->stream_on = 1; 774 mutex_unlock(&dev->lock); 775 return rc; 776} 777 778static int res_check(struct em28xx_fh *fh) 779{ 780 return (fh->stream_on); 781} 782 783static void res_free(struct em28xx_fh *fh) 784{ 785 struct em28xx *dev = fh->dev; 786 787 mutex_lock(&dev->lock); 788 fh->stream_on = 0; 789 dev->stream_on = 0; 790 mutex_unlock(&dev->lock); 791} 792 793/* 794 * em28xx_get_ctrl() 795 * return the current saturation, brightness or contrast, mute state 796 */ 797static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl) 798{ 799 switch (ctrl->id) { 800 case V4L2_CID_AUDIO_MUTE: 801 ctrl->value = dev->mute; 802 return 0; 803 case V4L2_CID_AUDIO_VOLUME: 804 ctrl->value = dev->volume; 805 return 0; 806 default: 807 return -EINVAL; 808 } 809} 810 811/* 812 * em28xx_set_ctrl() 813 * mute or set new saturation, brightness or contrast 814 */ 815static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl) 816{ 817 switch (ctrl->id) { 818 case V4L2_CID_AUDIO_MUTE: 819 if (ctrl->value != dev->mute) { 820 dev->mute = ctrl->value; 821 return em28xx_audio_analog_set(dev); 822 } 823 return 0; 824 case V4L2_CID_AUDIO_VOLUME: 825 dev->volume = ctrl->value; 826 return em28xx_audio_analog_set(dev); 827 default: 828 return -EINVAL; 829 } 830} 831 832static int check_dev(struct em28xx *dev) 833{ 834 if (dev->state & DEV_DISCONNECTED) { 835 em28xx_errdev("v4l2 ioctl: device not present\n"); 836 return -ENODEV; 837 } 838 839 if (dev->state & DEV_MISCONFIGURED) { 840 em28xx_errdev("v4l2 ioctl: device is misconfigured; " 841 "close and open it again\n"); 842 return -EIO; 843 } 844 return 0; 845} 846 847static void get_scale(struct em28xx *dev, 848 unsigned int width, unsigned int height, 849 unsigned int *hscale, unsigned int *vscale) 850{ 851 unsigned int maxw = norm_maxw(dev); 852 unsigned int maxh = norm_maxh(dev); 853 854 *hscale = (((unsigned long)maxw) << 12) / width - 4096L; 855 if (*hscale >= 0x4000) 856 *hscale = 0x3fff; 857 858 *vscale = (((unsigned long)maxh) << 12) / height - 4096L; 859 if (*vscale >= 0x4000) 860 *vscale = 0x3fff; 861} 862 863/* ------------------------------------------------------------------ 864 IOCTL vidioc handling 865 ------------------------------------------------------------------*/ 866 867static int vidioc_g_fmt_cap(struct file *file, void *priv, 868 struct v4l2_format *f) 869{ 870 struct em28xx_fh *fh = priv; 871 struct em28xx *dev = fh->dev; 872 873 mutex_lock(&dev->lock); 874 875 f->fmt.pix.width = dev->width; 876 f->fmt.pix.height = dev->height; 877 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; 878 f->fmt.pix.bytesperline = dev->width * 2; 879 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * dev->height; 880 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 881 882 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */ 883 f->fmt.pix.field = dev->interlaced ? 884 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; 885 886 mutex_unlock(&dev->lock); 887 return 0; 888} 889 890static int vidioc_try_fmt_cap(struct file *file, void *priv, 891 struct v4l2_format *f) 892{ 893 struct em28xx_fh *fh = priv; 894 struct em28xx *dev = fh->dev; 895 int width = f->fmt.pix.width; 896 int height = f->fmt.pix.height; 897 unsigned int maxw = norm_maxw(dev); 898 unsigned int maxh = norm_maxh(dev); 899 unsigned int hscale, vscale; 900 901 /* width must even because of the YUYV format 902 height must be even because of interlacing */ 903 height &= 0xfffe; 904 width &= 0xfffe; 905 906 if (height < 32) 907 height = 32; 908 if (height > maxh) 909 height = maxh; 910 if (width < 48) 911 width = 48; 912 if (width > maxw) 913 width = maxw; 914 915 mutex_lock(&dev->lock); 916 917 if (dev->is_em2800) { 918 /* the em2800 can only scale down to 50% */ 919 if (height % (maxh / 2)) 920 height = maxh; 921 if (width % (maxw / 2)) 922 width = maxw; 923 /* according to empiatech support */ 924 /* the MaxPacketSize is to small to support */ 925 /* framesizes larger than 640x480 @ 30 fps */ 926 /* or 640x576 @ 25 fps. As this would cut */ 927 /* of a part of the image we prefer */ 928 /* 360x576 or 360x480 for now */ 929 if (width == maxw && height == maxh) 930 width /= 2; 931 } 932 933 get_scale(dev, width, height, &hscale, &vscale); 934 935 width = (((unsigned long)maxw) << 12) / (hscale + 4096L); 936 height = (((unsigned long)maxh) << 12) / (vscale + 4096L); 937 938 f->fmt.pix.width = width; 939 f->fmt.pix.height = height; 940 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; 941 f->fmt.pix.bytesperline = width * 2; 942 f->fmt.pix.sizeimage = width * 2 * height; 943 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 944 f->fmt.pix.field = V4L2_FIELD_INTERLACED; 945 946 mutex_unlock(&dev->lock); 947 return 0; 948} 949 950static int vidioc_s_fmt_cap(struct file *file, void *priv, 951 struct v4l2_format *f) 952{ 953 struct em28xx_fh *fh = priv; 954 struct em28xx *dev = fh->dev; 955 int rc; 956 957 rc = check_dev(dev); 958 if (rc < 0) 959 return rc; 960 961 vidioc_try_fmt_cap(file, priv, f); 962 963 mutex_lock(&dev->lock); 964 965 if (videobuf_queue_is_busy(&fh->vb_vidq)) { 966 em28xx_errdev("%s queue busy\n", __func__); 967 rc = -EBUSY; 968 goto out; 969 } 970 971 if (dev->stream_on && !fh->stream_on) { 972 em28xx_errdev("%s device in use by another fh\n", __func__); 973 rc = -EBUSY; 974 goto out; 975 } 976 977 /* set new image size */ 978 dev->width = f->fmt.pix.width; 979 dev->height = f->fmt.pix.height; 980 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale); 981 982 em28xx_set_alternate(dev); 983 em28xx_resolution_set(dev); 984 985 rc = 0; 986 987out: 988 mutex_unlock(&dev->lock); 989 return rc; 990} 991 992static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm) 993{ 994 struct em28xx_fh *fh = priv; 995 struct em28xx *dev = fh->dev; 996 struct v4l2_format f; 997 int rc; 998 999 rc = check_dev(dev); 1000 if (rc < 0) 1001 return rc; 1002 1003 mutex_lock(&dev->lock); 1004 dev->norm = *norm; 1005 mutex_unlock(&dev->lock); 1006 1007 /* Adjusts width/height, if needed */ 1008 f.fmt.pix.width = dev->width; 1009 f.fmt.pix.height = dev->height; 1010 vidioc_try_fmt_cap(file, priv, &f); 1011 1012 mutex_lock(&dev->lock); 1013 1014 /* set new image size */ 1015 dev->width = f.fmt.pix.width; 1016 dev->height = f.fmt.pix.height; 1017 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale); 1018 1019 em28xx_resolution_set(dev); 1020 em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm); 1021 1022 mutex_unlock(&dev->lock); 1023 return 0; 1024} 1025 1026static const char *iname[] = { 1027 [EM28XX_VMUX_COMPOSITE1] = "Composite1", 1028 [EM28XX_VMUX_COMPOSITE2] = "Composite2", 1029 [EM28XX_VMUX_COMPOSITE3] = "Composite3", 1030 [EM28XX_VMUX_COMPOSITE4] = "Composite4", 1031 [EM28XX_VMUX_SVIDEO] = "S-Video", 1032 [EM28XX_VMUX_TELEVISION] = "Television", 1033 [EM28XX_VMUX_CABLE] = "Cable TV", 1034 [EM28XX_VMUX_DVB] = "DVB", 1035 [EM28XX_VMUX_DEBUG] = "for debug only", 1036}; 1037 1038static int vidioc_enum_input(struct file *file, void *priv, 1039 struct v4l2_input *i) 1040{ 1041 struct em28xx_fh *fh = priv; 1042 struct em28xx *dev = fh->dev; 1043 unsigned int n; 1044 1045 n = i->index; 1046 if (n >= MAX_EM28XX_INPUT) 1047 return -EINVAL; 1048 if (0 == INPUT(n)->type) 1049 return -EINVAL; 1050 1051 i->index = n; 1052 i->type = V4L2_INPUT_TYPE_CAMERA; 1053 1054 strcpy(i->name, iname[INPUT(n)->type]); 1055 1056 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) || 1057 (EM28XX_VMUX_CABLE == INPUT(n)->type)) 1058 i->type = V4L2_INPUT_TYPE_TUNER; 1059 1060 i->std = dev->vdev->tvnorms; 1061 1062 return 0; 1063} 1064 1065static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 1066{ 1067 struct em28xx_fh *fh = priv; 1068 struct em28xx *dev = fh->dev; 1069 1070 *i = dev->ctl_input; 1071 1072 return 0; 1073} 1074 1075static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 1076{ 1077 struct em28xx_fh *fh = priv; 1078 struct em28xx *dev = fh->dev; 1079 int rc; 1080 1081 rc = check_dev(dev); 1082 if (rc < 0) 1083 return rc; 1084 1085 if (i >= MAX_EM28XX_INPUT) 1086 return -EINVAL; 1087 if (0 == INPUT(i)->type) 1088 return -EINVAL; 1089 1090 mutex_lock(&dev->lock); 1091 1092 video_mux(dev, i); 1093 1094 mutex_unlock(&dev->lock); 1095 return 0; 1096} 1097 1098static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a) 1099{ 1100 struct em28xx_fh *fh = priv; 1101 struct em28xx *dev = fh->dev; 1102 unsigned int index = a->index; 1103 1104 if (a->index > 1) 1105 return -EINVAL; 1106 1107 index = dev->ctl_ainput; 1108 1109 if (index == 0) { 1110 strcpy(a->name, "Television"); 1111 } else { 1112 strcpy(a->name, "Line In"); 1113 } 1114 a->capability = V4L2_AUDCAP_STEREO; 1115 a->index = index; 1116 1117 return 0; 1118} 1119 1120static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a) 1121{ 1122 struct em28xx_fh *fh = priv; 1123 struct em28xx *dev = fh->dev; 1124 1125 if (a->index != dev->ctl_ainput) 1126 return -EINVAL; 1127 1128 return 0; 1129} 1130 1131static int vidioc_queryctrl(struct file *file, void *priv, 1132 struct v4l2_queryctrl *qc) 1133{ 1134 struct em28xx_fh *fh = priv; 1135 struct em28xx *dev = fh->dev; 1136 int id = qc->id; 1137 int i; 1138 int rc; 1139 1140 rc = check_dev(dev); 1141 if (rc < 0) 1142 return rc; 1143 1144 memset(qc, 0, sizeof(*qc)); 1145 1146 qc->id = id; 1147 1148 if (!dev->has_msp34xx) { 1149 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) { 1150 if (qc->id && qc->id == em28xx_qctrl[i].id) { 1151 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc)); 1152 return 0; 1153 } 1154 } 1155 } 1156 mutex_lock(&dev->lock); 1157 em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc); 1158 mutex_unlock(&dev->lock); 1159 1160 if (qc->type) 1161 return 0; 1162 else 1163 return -EINVAL; 1164} 1165 1166static int vidioc_g_ctrl(struct file *file, void *priv, 1167 struct v4l2_control *ctrl) 1168{ 1169 struct em28xx_fh *fh = priv; 1170 struct em28xx *dev = fh->dev; 1171 int rc; 1172 1173 rc = check_dev(dev); 1174 if (rc < 0) 1175 return rc; 1176 mutex_lock(&dev->lock); 1177 1178 if (!dev->has_msp34xx) 1179 rc = em28xx_get_ctrl(dev, ctrl); 1180 else 1181 rc = -EINVAL; 1182 1183 if (rc == -EINVAL) { 1184 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl); 1185 rc = 0; 1186 } 1187 1188 mutex_unlock(&dev->lock); 1189 return rc; 1190} 1191 1192static int vidioc_s_ctrl(struct file *file, void *priv, 1193 struct v4l2_control *ctrl) 1194{ 1195 struct em28xx_fh *fh = priv; 1196 struct em28xx *dev = fh->dev; 1197 u8 i; 1198 int rc; 1199 1200 rc = check_dev(dev); 1201 if (rc < 0) 1202 return rc; 1203 1204 mutex_lock(&dev->lock); 1205 1206 if (dev->has_msp34xx) 1207 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl); 1208 else { 1209 rc = 1; 1210 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) { 1211 if (ctrl->id == em28xx_qctrl[i].id) { 1212 if (ctrl->value < em28xx_qctrl[i].minimum || 1213 ctrl->value > em28xx_qctrl[i].maximum) { 1214 rc = -ERANGE; 1215 break; 1216 } 1217 1218 rc = em28xx_set_ctrl(dev, ctrl); 1219 break; 1220 } 1221 } 1222 } 1223 1224 /* Control not found - try to send it to the attached devices */ 1225 if (rc == 1) { 1226 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl); 1227 rc = 0; 1228 } 1229 1230 mutex_unlock(&dev->lock); 1231 return rc; 1232} 1233 1234static int vidioc_g_tuner(struct file *file, void *priv, 1235 struct v4l2_tuner *t) 1236{ 1237 struct em28xx_fh *fh = priv; 1238 struct em28xx *dev = fh->dev; 1239 int rc; 1240 1241 rc = check_dev(dev); 1242 if (rc < 0) 1243 return rc; 1244 1245 if (0 != t->index) 1246 return -EINVAL; 1247 1248 strcpy(t->name, "Tuner"); 1249 1250 mutex_lock(&dev->lock); 1251 1252 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t); 1253 1254 mutex_unlock(&dev->lock); 1255 return 0; 1256} 1257 1258static int vidioc_s_tuner(struct file *file, void *priv, 1259 struct v4l2_tuner *t) 1260{ 1261 struct em28xx_fh *fh = priv; 1262 struct em28xx *dev = fh->dev; 1263 int rc; 1264 1265 rc = check_dev(dev); 1266 if (rc < 0) 1267 return rc; 1268 1269 if (0 != t->index) 1270 return -EINVAL; 1271 1272 mutex_lock(&dev->lock); 1273 1274 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t); 1275 1276 mutex_unlock(&dev->lock); 1277 return 0; 1278} 1279 1280static int vidioc_g_frequency(struct file *file, void *priv, 1281 struct v4l2_frequency *f) 1282{ 1283 struct em28xx_fh *fh = priv; 1284 struct em28xx *dev = fh->dev; 1285 1286 f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1287 f->frequency = dev->ctl_freq; 1288 1289 return 0; 1290} 1291 1292static int vidioc_s_frequency(struct file *file, void *priv, 1293 struct v4l2_frequency *f) 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 (0 != f->tuner) 1304 return -EINVAL; 1305 1306 if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV)) 1307 return -EINVAL; 1308 if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO)) 1309 return -EINVAL; 1310 1311 mutex_lock(&dev->lock); 1312 1313 dev->ctl_freq = f->frequency; 1314 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f); 1315 1316 mutex_unlock(&dev->lock); 1317 return 0; 1318} 1319 1320#ifdef CONFIG_VIDEO_ADV_DEBUG 1321static int em28xx_reg_len(int reg) 1322{ 1323 switch (reg) { 1324 case AC97LSB_REG: 1325 case HSCALELOW_REG: 1326 case VSCALELOW_REG: 1327 return 2; 1328 default: 1329 return 1; 1330 } 1331} 1332 1333static int vidioc_g_register(struct file *file, void *priv, 1334 struct v4l2_register *reg) 1335{ 1336 struct em28xx_fh *fh = priv; 1337 struct em28xx *dev = fh->dev; 1338 int ret; 1339 1340 if (!v4l2_chip_match_host(reg->match_type, reg->match_chip)) 1341 return -EINVAL; 1342 1343 if (em28xx_reg_len(reg->reg) == 1) { 1344 ret = em28xx_read_reg(dev, reg->reg); 1345 if (ret < 0) 1346 return ret; 1347 1348 reg->val = ret; 1349 } else { 1350 u64 val = 0; 1351 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS, 1352 reg->reg, (char *)&val, 2); 1353 if (ret < 0) 1354 return ret; 1355 1356 reg->val = cpu_to_le64((__u64)val); 1357 } 1358 1359 return 0; 1360} 1361 1362static int vidioc_s_register(struct file *file, void *priv, 1363 struct v4l2_register *reg) 1364{ 1365 struct em28xx_fh *fh = priv; 1366 struct em28xx *dev = fh->dev; 1367 u64 buf; 1368 1369 buf = le64_to_cpu((__u64)reg->val); 1370 1371 return em28xx_write_regs(dev, reg->reg, (char *)&buf, 1372 em28xx_reg_len(reg->reg)); 1373} 1374#endif 1375 1376 1377static int vidioc_cropcap(struct file *file, void *priv, 1378 struct v4l2_cropcap *cc) 1379{ 1380 struct em28xx_fh *fh = priv; 1381 struct em28xx *dev = fh->dev; 1382 1383 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 1384 return -EINVAL; 1385 1386 cc->bounds.left = 0; 1387 cc->bounds.top = 0; 1388 cc->bounds.width = dev->width; 1389 cc->bounds.height = dev->height; 1390 cc->defrect = cc->bounds; 1391 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */ 1392 cc->pixelaspect.denominator = 59; 1393 1394 return 0; 1395} 1396 1397static int vidioc_streamon(struct file *file, void *priv, 1398 enum v4l2_buf_type type) 1399{ 1400 struct em28xx_fh *fh = priv; 1401 struct em28xx *dev = fh->dev; 1402 int rc; 1403 1404 rc = check_dev(dev); 1405 if (rc < 0) 1406 return rc; 1407 1408 1409 if (unlikely(res_get(fh) < 0)) 1410 return -EBUSY; 1411 1412 return (videobuf_streamon(&fh->vb_vidq)); 1413} 1414 1415static int vidioc_streamoff(struct file *file, void *priv, 1416 enum v4l2_buf_type type) 1417{ 1418 struct em28xx_fh *fh = priv; 1419 struct em28xx *dev = fh->dev; 1420 int rc; 1421 1422 rc = check_dev(dev); 1423 if (rc < 0) 1424 return rc; 1425 1426 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 1427 return -EINVAL; 1428 if (type != fh->type) 1429 return -EINVAL; 1430 1431 videobuf_streamoff(&fh->vb_vidq); 1432 res_free(fh); 1433 1434 return 0; 1435} 1436 1437static int vidioc_querycap(struct file *file, void *priv, 1438 struct v4l2_capability *cap) 1439{ 1440 struct em28xx_fh *fh = priv; 1441 struct em28xx *dev = fh->dev; 1442 1443 strlcpy(cap->driver, "em28xx", sizeof(cap->driver)); 1444 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card)); 1445 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info)); 1446 1447 cap->version = EM28XX_VERSION_CODE; 1448 1449 cap->capabilities = 1450 V4L2_CAP_SLICED_VBI_CAPTURE | 1451 V4L2_CAP_VIDEO_CAPTURE | 1452 V4L2_CAP_AUDIO | 1453 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; 1454 1455 if (dev->tuner_type != TUNER_ABSENT) 1456 cap->capabilities |= V4L2_CAP_TUNER; 1457 1458 return 0; 1459} 1460 1461static int vidioc_enum_fmt_cap(struct file *file, void *priv, 1462 struct v4l2_fmtdesc *fmtd) 1463{ 1464 if (fmtd->index != 0) 1465 return -EINVAL; 1466 1467 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1468 strcpy(fmtd->description, "Packed YUY2"); 1469 fmtd->pixelformat = V4L2_PIX_FMT_YUYV; 1470 memset(fmtd->reserved, 0, sizeof(fmtd->reserved)); 1471 1472 return 0; 1473} 1474 1475/* Sliced VBI ioctls */ 1476static int vidioc_g_fmt_vbi_capture(struct file *file, void *priv, 1477 struct v4l2_format *f) 1478{ 1479 struct em28xx_fh *fh = priv; 1480 struct em28xx *dev = fh->dev; 1481 int rc; 1482 1483 rc = check_dev(dev); 1484 if (rc < 0) 1485 return rc; 1486 1487 mutex_lock(&dev->lock); 1488 1489 f->fmt.sliced.service_set = 0; 1490 1491 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f); 1492 1493 if (f->fmt.sliced.service_set == 0) 1494 rc = -EINVAL; 1495 1496 mutex_unlock(&dev->lock); 1497 return rc; 1498} 1499 1500static int vidioc_try_set_vbi_capture(struct file *file, void *priv, 1501 struct v4l2_format *f) 1502{ 1503 struct em28xx_fh *fh = priv; 1504 struct em28xx *dev = fh->dev; 1505 int rc; 1506 1507 rc = check_dev(dev); 1508 if (rc < 0) 1509 return rc; 1510 1511 mutex_lock(&dev->lock); 1512 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f); 1513 mutex_unlock(&dev->lock); 1514 1515 if (f->fmt.sliced.service_set == 0) 1516 return -EINVAL; 1517 1518 return 0; 1519} 1520 1521 1522static int vidioc_reqbufs(struct file *file, void *priv, 1523 struct v4l2_requestbuffers *rb) 1524{ 1525 struct em28xx_fh *fh = priv; 1526 struct em28xx *dev = fh->dev; 1527 int rc; 1528 1529 rc = check_dev(dev); 1530 if (rc < 0) 1531 return rc; 1532 1533 return (videobuf_reqbufs(&fh->vb_vidq, rb)); 1534} 1535 1536static int vidioc_querybuf(struct file *file, void *priv, 1537 struct v4l2_buffer *b) 1538{ 1539 struct em28xx_fh *fh = priv; 1540 struct em28xx *dev = fh->dev; 1541 int rc; 1542 1543 rc = check_dev(dev); 1544 if (rc < 0) 1545 return rc; 1546 1547 return (videobuf_querybuf(&fh->vb_vidq, b)); 1548} 1549 1550static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b) 1551{ 1552 struct em28xx_fh *fh = priv; 1553 struct em28xx *dev = fh->dev; 1554 int rc; 1555 1556 rc = check_dev(dev); 1557 if (rc < 0) 1558 return rc; 1559 1560 return (videobuf_qbuf(&fh->vb_vidq, b)); 1561} 1562 1563static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b) 1564{ 1565 struct em28xx_fh *fh = priv; 1566 struct em28xx *dev = fh->dev; 1567 int rc; 1568 1569 rc = check_dev(dev); 1570 if (rc < 0) 1571 return rc; 1572 1573 return (videobuf_dqbuf(&fh->vb_vidq, b, 1574 file->f_flags & O_NONBLOCK)); 1575} 1576 1577#ifdef CONFIG_VIDEO_V4L1_COMPAT 1578static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf) 1579{ 1580 struct em28xx_fh *fh = priv; 1581 1582 return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8); 1583} 1584#endif 1585 1586 1587/* ----------------------------------------------------------- */ 1588/* RADIO ESPECIFIC IOCTLS */ 1589/* ----------------------------------------------------------- */ 1590 1591static int radio_querycap(struct file *file, void *priv, 1592 struct v4l2_capability *cap) 1593{ 1594 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev; 1595 1596 strlcpy(cap->driver, "em28xx", sizeof(cap->driver)); 1597 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card)); 1598 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info)); 1599 1600 cap->version = EM28XX_VERSION_CODE; 1601 cap->capabilities = V4L2_CAP_TUNER; 1602 return 0; 1603} 1604 1605static int radio_g_tuner(struct file *file, void *priv, 1606 struct v4l2_tuner *t) 1607{ 1608 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev; 1609 1610 if (unlikely(t->index > 0)) 1611 return -EINVAL; 1612 1613 strcpy(t->name, "Radio"); 1614 t->type = V4L2_TUNER_RADIO; 1615 1616 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t); 1617 return 0; 1618} 1619 1620static int radio_enum_input(struct file *file, void *priv, 1621 struct v4l2_input *i) 1622{ 1623 if (i->index != 0) 1624 return -EINVAL; 1625 strcpy(i->name, "Radio"); 1626 i->type = V4L2_INPUT_TYPE_TUNER; 1627 1628 return 0; 1629} 1630 1631static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a) 1632{ 1633 if (unlikely(a->index)) 1634 return -EINVAL; 1635 1636 strcpy(a->name, "Radio"); 1637 return 0; 1638} 1639 1640static int radio_s_tuner(struct file *file, void *priv, 1641 struct v4l2_tuner *t) 1642{ 1643 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev; 1644 1645 if (0 != t->index) 1646 return -EINVAL; 1647 1648 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t); 1649 1650 return 0; 1651} 1652 1653static int radio_s_audio(struct file *file, void *fh, 1654 struct v4l2_audio *a) 1655{ 1656 return 0; 1657} 1658 1659static int radio_s_input(struct file *file, void *fh, unsigned int i) 1660{ 1661 return 0; 1662} 1663 1664static int radio_queryctrl(struct file *file, void *priv, 1665 struct v4l2_queryctrl *qc) 1666{ 1667 int i; 1668 1669 if (qc->id < V4L2_CID_BASE || 1670 qc->id >= V4L2_CID_LASTP1) 1671 return -EINVAL; 1672 1673 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) { 1674 if (qc->id && qc->id == em28xx_qctrl[i].id) { 1675 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc)); 1676 return 0; 1677 } 1678 } 1679 1680 return -EINVAL; 1681} 1682 1683/* 1684 * em28xx_v4l2_open() 1685 * inits the device and starts isoc transfer 1686 */ 1687static int em28xx_v4l2_open(struct inode *inode, struct file *filp) 1688{ 1689 int minor = iminor(inode); 1690 int errCode = 0, radio = 0; 1691 struct em28xx *h,*dev = NULL; 1692 struct em28xx_fh *fh; 1693 enum v4l2_buf_type fh_type = 0; 1694 1695 list_for_each_entry(h, &em28xx_devlist, devlist) { 1696 if (h->vdev->minor == minor) { 1697 dev = h; 1698 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1699 } 1700 if (h->vbi_dev->minor == minor) { 1701 dev = h; 1702 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE; 1703 } 1704 if (h->radio_dev && 1705 h->radio_dev->minor == minor) { 1706 radio = 1; 1707 dev = h; 1708 } 1709 } 1710 if (NULL == dev) 1711 return -ENODEV; 1712 1713 em28xx_videodbg("open minor=%d type=%s users=%d\n", 1714 minor, v4l2_type_names[fh_type], dev->users); 1715 1716 fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL); 1717 1718 if (!fh) { 1719 em28xx_errdev("em28xx-video.c: Out of memory?!\n"); 1720 return -ENOMEM; 1721 } 1722 mutex_lock(&dev->lock); 1723 fh->dev = dev; 1724 fh->radio = radio; 1725 fh->type = fh_type; 1726 filp->private_data = fh; 1727 1728 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) { 1729 dev->width = norm_maxw(dev); 1730 dev->height = norm_maxh(dev); 1731 dev->hscale = 0; 1732 dev->vscale = 0; 1733 1734 em28xx_set_alternate(dev); 1735 em28xx_resolution_set(dev); 1736 1737 } 1738 if (fh->radio) { 1739 em28xx_videodbg("video_open: setting radio device\n"); 1740 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL); 1741 } 1742 1743 dev->users++; 1744 1745 videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops, 1746 NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED, 1747 sizeof(struct em28xx_buffer), fh); 1748 1749 mutex_unlock(&dev->lock); 1750 return errCode; 1751} 1752 1753/* 1754 * em28xx_realease_resources() 1755 * unregisters the v4l2,i2c and usb devices 1756 * called when the device gets disconected or at module unload 1757*/ 1758static void em28xx_release_resources(struct em28xx *dev) 1759{ 1760 1761 /*FIXME: I2C IR should be disconnected */ 1762 1763 em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n", 1764 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN, 1765 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN); 1766 list_del(&dev->devlist); 1767 if (dev->radio_dev) { 1768 if (-1 != dev->radio_dev->minor) 1769 video_unregister_device(dev->radio_dev); 1770 else 1771 video_device_release(dev->radio_dev); 1772 dev->radio_dev = NULL; 1773 } 1774 if (dev->vbi_dev) { 1775 if (-1 != dev->vbi_dev->minor) 1776 video_unregister_device(dev->vbi_dev); 1777 else 1778 video_device_release(dev->vbi_dev); 1779 dev->vbi_dev = NULL; 1780 } 1781 if (dev->vdev) { 1782 if (-1 != dev->vdev->minor) 1783 video_unregister_device(dev->vdev); 1784 else 1785 video_device_release(dev->vdev); 1786 dev->vdev = NULL; 1787 } 1788 em28xx_i2c_unregister(dev); 1789 usb_put_dev(dev->udev); 1790 1791 /* Mark device as unused */ 1792 em28xx_devused&=~(1<<dev->devno); 1793} 1794 1795/* 1796 * em28xx_v4l2_close() 1797 * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls 1798 */ 1799static int em28xx_v4l2_close(struct inode *inode, struct file *filp) 1800{ 1801 struct em28xx_fh *fh = filp->private_data; 1802 struct em28xx *dev = fh->dev; 1803 int errCode; 1804 1805 em28xx_videodbg("users=%d\n", dev->users); 1806 1807 1808 if (res_check(fh)) 1809 res_free(fh); 1810 1811 mutex_lock(&dev->lock); 1812 1813 if (dev->users == 1) { 1814 videobuf_stop(&fh->vb_vidq); 1815 videobuf_mmap_free(&fh->vb_vidq); 1816 1817 /* the device is already disconnect, 1818 free the remaining resources */ 1819 if (dev->state & DEV_DISCONNECTED) { 1820 em28xx_release_resources(dev); 1821 mutex_unlock(&dev->lock); 1822 kfree(dev); 1823 return 0; 1824 } 1825 1826 /* do this before setting alternate! */ 1827 em28xx_uninit_isoc(dev); 1828 1829 /* set alternate 0 */ 1830 dev->alt = 0; 1831 em28xx_videodbg("setting alternate 0\n"); 1832 errCode = usb_set_interface(dev->udev, 0, 0); 1833 if (errCode < 0) { 1834 em28xx_errdev("cannot change alternate number to " 1835 "0 (error=%i)\n", errCode); 1836 } 1837 } 1838 kfree(fh); 1839 dev->users--; 1840 wake_up_interruptible_nr(&dev->open, 1); 1841 mutex_unlock(&dev->lock); 1842 return 0; 1843} 1844 1845/* 1846 * em28xx_v4l2_read() 1847 * will allocate buffers when called for the first time 1848 */ 1849static ssize_t 1850em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count, 1851 loff_t *pos) 1852{ 1853 struct em28xx_fh *fh = filp->private_data; 1854 struct em28xx *dev = fh->dev; 1855 int rc; 1856 1857 rc = check_dev(dev); 1858 if (rc < 0) 1859 return rc; 1860 1861 /* FIXME: read() is not prepared to allow changing the video 1862 resolution while streaming. Seems a bug at em28xx_set_fmt 1863 */ 1864 1865 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { 1866 if (unlikely(res_get(fh))) 1867 return -EBUSY; 1868 1869 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0, 1870 filp->f_flags & O_NONBLOCK); 1871 } 1872 return 0; 1873} 1874 1875/* 1876 * em28xx_v4l2_poll() 1877 * will allocate buffers when called for the first time 1878 */ 1879static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait) 1880{ 1881 struct em28xx_fh *fh = filp->private_data; 1882 struct em28xx *dev = fh->dev; 1883 int rc; 1884 1885 rc = check_dev(dev); 1886 if (rc < 0) 1887 return rc; 1888 1889 if (unlikely(res_get(fh) < 0)) 1890 return POLLERR; 1891 1892 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type) 1893 return POLLERR; 1894 1895 return videobuf_poll_stream(filp, &fh->vb_vidq, wait); 1896} 1897 1898/* 1899 * em28xx_v4l2_mmap() 1900 */ 1901static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma) 1902{ 1903 struct em28xx_fh *fh = filp->private_data; 1904 struct em28xx *dev = fh->dev; 1905 int rc; 1906 1907 if (unlikely(res_get(fh) < 0)) 1908 return -EBUSY; 1909 1910 rc = check_dev(dev); 1911 if (rc < 0) 1912 return rc; 1913 1914 rc = videobuf_mmap_mapper(&fh->vb_vidq, vma); 1915 1916 em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n", 1917 (unsigned long)vma->vm_start, 1918 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start, 1919 rc); 1920 1921 return rc; 1922} 1923 1924static const struct file_operations em28xx_v4l_fops = { 1925 .owner = THIS_MODULE, 1926 .open = em28xx_v4l2_open, 1927 .release = em28xx_v4l2_close, 1928 .read = em28xx_v4l2_read, 1929 .poll = em28xx_v4l2_poll, 1930 .mmap = em28xx_v4l2_mmap, 1931 .ioctl = video_ioctl2, 1932 .llseek = no_llseek, 1933 .compat_ioctl = v4l_compat_ioctl32, 1934}; 1935 1936static const struct file_operations radio_fops = { 1937 .owner = THIS_MODULE, 1938 .open = em28xx_v4l2_open, 1939 .release = em28xx_v4l2_close, 1940 .ioctl = video_ioctl2, 1941 .compat_ioctl = v4l_compat_ioctl32, 1942 .llseek = no_llseek, 1943}; 1944 1945static const struct video_device em28xx_video_template = { 1946 .fops = &em28xx_v4l_fops, 1947 .release = video_device_release, 1948 1949 .minor = -1, 1950 .vidioc_querycap = vidioc_querycap, 1951 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap, 1952 .vidioc_g_fmt_cap = vidioc_g_fmt_cap, 1953 .vidioc_try_fmt_cap = vidioc_try_fmt_cap, 1954 .vidioc_s_fmt_cap = vidioc_s_fmt_cap, 1955 .vidioc_g_audio = vidioc_g_audio, 1956 .vidioc_s_audio = vidioc_s_audio, 1957 .vidioc_cropcap = vidioc_cropcap, 1958 1959 .vidioc_g_fmt_vbi_capture = vidioc_g_fmt_vbi_capture, 1960 .vidioc_try_fmt_vbi_capture = vidioc_try_set_vbi_capture, 1961 .vidioc_s_fmt_vbi_capture = vidioc_try_set_vbi_capture, 1962 1963 .vidioc_reqbufs = vidioc_reqbufs, 1964 .vidioc_querybuf = vidioc_querybuf, 1965 .vidioc_qbuf = vidioc_qbuf, 1966 .vidioc_dqbuf = vidioc_dqbuf, 1967 .vidioc_s_std = vidioc_s_std, 1968 .vidioc_enum_input = vidioc_enum_input, 1969 .vidioc_g_input = vidioc_g_input, 1970 .vidioc_s_input = vidioc_s_input, 1971 .vidioc_queryctrl = vidioc_queryctrl, 1972 .vidioc_g_ctrl = vidioc_g_ctrl, 1973 .vidioc_s_ctrl = vidioc_s_ctrl, 1974 .vidioc_streamon = vidioc_streamon, 1975 .vidioc_streamoff = vidioc_streamoff, 1976 .vidioc_g_tuner = vidioc_g_tuner, 1977 .vidioc_s_tuner = vidioc_s_tuner, 1978 .vidioc_g_frequency = vidioc_g_frequency, 1979 .vidioc_s_frequency = vidioc_s_frequency, 1980#ifdef CONFIG_VIDEO_ADV_DEBUG 1981 .vidioc_g_register = vidioc_g_register, 1982 .vidioc_s_register = vidioc_s_register, 1983#endif 1984#ifdef CONFIG_VIDEO_V4L1_COMPAT 1985 .vidiocgmbuf = vidiocgmbuf, 1986#endif 1987 1988 .tvnorms = V4L2_STD_ALL, 1989 .current_norm = V4L2_STD_PAL, 1990}; 1991 1992static struct video_device em28xx_radio_template = { 1993 .name = "em28xx-radio", 1994 .type = VID_TYPE_TUNER, 1995 .fops = &radio_fops, 1996 .minor = -1, 1997 .vidioc_querycap = radio_querycap, 1998 .vidioc_g_tuner = radio_g_tuner, 1999 .vidioc_enum_input = radio_enum_input, 2000 .vidioc_g_audio = radio_g_audio, 2001 .vidioc_s_tuner = radio_s_tuner, 2002 .vidioc_s_audio = radio_s_audio, 2003 .vidioc_s_input = radio_s_input, 2004 .vidioc_queryctrl = radio_queryctrl, 2005 .vidioc_g_ctrl = vidioc_g_ctrl, 2006 .vidioc_s_ctrl = vidioc_s_ctrl, 2007 .vidioc_g_frequency = vidioc_g_frequency, 2008 .vidioc_s_frequency = vidioc_s_frequency, 2009#ifdef CONFIG_VIDEO_ADV_DEBUG 2010 .vidioc_g_register = vidioc_g_register, 2011 .vidioc_s_register = vidioc_s_register, 2012#endif 2013}; 2014 2015/******************************** usb interface *****************************************/ 2016 2017 2018static LIST_HEAD(em28xx_extension_devlist); 2019static DEFINE_MUTEX(em28xx_extension_devlist_lock); 2020 2021int em28xx_register_extension(struct em28xx_ops *ops) 2022{ 2023 struct em28xx *h, *dev = NULL; 2024 2025 list_for_each_entry(h, &em28xx_devlist, devlist) 2026 dev = h; 2027 2028 mutex_lock(&em28xx_extension_devlist_lock); 2029 list_add_tail(&ops->next, &em28xx_extension_devlist); 2030 if (dev) 2031 ops->init(dev); 2032 2033 printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name); 2034 mutex_unlock(&em28xx_extension_devlist_lock); 2035 2036 return 0; 2037} 2038EXPORT_SYMBOL(em28xx_register_extension); 2039 2040void em28xx_unregister_extension(struct em28xx_ops *ops) 2041{ 2042 struct em28xx *h, *dev = NULL; 2043 2044 list_for_each_entry(h, &em28xx_devlist, devlist) 2045 dev = h; 2046 2047 if (dev) 2048 ops->fini(dev); 2049 2050 mutex_lock(&em28xx_extension_devlist_lock); 2051 printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name); 2052 list_del(&ops->next); 2053 mutex_unlock(&em28xx_extension_devlist_lock); 2054} 2055EXPORT_SYMBOL(em28xx_unregister_extension); 2056 2057static struct video_device *em28xx_vdev_init(struct em28xx *dev, 2058 const struct video_device *template, 2059 const int type, 2060 const char *type_name) 2061{ 2062 struct video_device *vfd; 2063 2064 vfd = video_device_alloc(); 2065 if (NULL == vfd) 2066 return NULL; 2067 *vfd = *template; 2068 vfd->minor = -1; 2069 vfd->dev = &dev->udev->dev; 2070 vfd->release = video_device_release; 2071 vfd->type = type; 2072 vfd->debug = video_debug; 2073 2074 snprintf(vfd->name, sizeof(vfd->name), "%s %s", 2075 dev->name, type_name); 2076 2077 return vfd; 2078} 2079 2080 2081/* 2082 * em28xx_init_dev() 2083 * allocates and inits the device structs, registers i2c bus and v4l device 2084 */ 2085static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev, 2086 int minor) 2087{ 2088 struct em28xx_ops *ops = NULL; 2089 struct em28xx *dev = *devhandle; 2090 int retval = -ENOMEM; 2091 int errCode; 2092 unsigned int maxh, maxw; 2093 2094 dev->udev = udev; 2095 mutex_init(&dev->lock); 2096 spin_lock_init(&dev->slock); 2097 init_waitqueue_head(&dev->open); 2098 init_waitqueue_head(&dev->wait_frame); 2099 init_waitqueue_head(&dev->wait_stream); 2100 2101 dev->em28xx_write_regs = em28xx_write_regs; 2102 dev->em28xx_read_reg = em28xx_read_reg; 2103 dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len; 2104 dev->em28xx_write_regs_req = em28xx_write_regs_req; 2105 dev->em28xx_read_reg_req = em28xx_read_reg_req; 2106 dev->is_em2800 = em28xx_boards[dev->model].is_em2800; 2107 2108 errCode = em28xx_read_reg(dev, CHIPID_REG); 2109 if (errCode >= 0) 2110 em28xx_info("em28xx chip ID = %d\n", errCode); 2111 2112 em28xx_pre_card_setup(dev); 2113 2114 errCode = em28xx_config(dev); 2115 if (errCode) { 2116 em28xx_errdev("error configuring device\n"); 2117 em28xx_devused &= ~(1<<dev->devno); 2118 kfree(dev); 2119 return -ENOMEM; 2120 } 2121 2122 /* register i2c bus */ 2123 em28xx_i2c_register(dev); 2124 2125 /* Do board specific init and eeprom reading */ 2126 em28xx_card_setup(dev); 2127 2128 /* Configure audio */ 2129 em28xx_audio_analog_set(dev); 2130 2131 /* configure the device */ 2132 em28xx_config_i2c(dev); 2133 2134 /* set default norm */ 2135 dev->norm = em28xx_video_template.current_norm; 2136 2137 maxw = norm_maxw(dev); 2138 maxh = norm_maxh(dev); 2139 2140 /* set default image size */ 2141 dev->width = maxw; 2142 dev->height = maxh; 2143 dev->interlaced = EM28XX_INTERLACED_DEFAULT; 2144 dev->hscale = 0; 2145 dev->vscale = 0; 2146 dev->ctl_input = 2; 2147 2148 errCode = em28xx_config(dev); 2149 2150 list_add_tail(&dev->devlist, &em28xx_devlist); 2151 2152 /* allocate and fill video video_device struct */ 2153 dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, 2154 VID_TYPE_CAPTURE, "video"); 2155 if (NULL == dev->vdev) { 2156 em28xx_errdev("cannot allocate video_device.\n"); 2157 goto fail_unreg; 2158 } 2159 if (dev->tuner_type != TUNER_ABSENT) 2160 dev->vdev->type |= VID_TYPE_TUNER; 2161 2162 /* register v4l2 video video_device */ 2163 retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER, 2164 video_nr[dev->devno]); 2165 if (retval) { 2166 em28xx_errdev("unable to register video device (error=%i).\n", 2167 retval); 2168 goto fail_unreg; 2169 } 2170 2171 /* Allocate and fill vbi video_device struct */ 2172 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template, 2173 VFL_TYPE_VBI, "vbi"); 2174 /* register v4l2 vbi video_device */ 2175 if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI, 2176 vbi_nr[dev->devno]) < 0) { 2177 em28xx_errdev("unable to register vbi device\n"); 2178 retval = -ENODEV; 2179 goto fail_unreg; 2180 } 2181 2182 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) { 2183 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template, 2184 VFL_TYPE_RADIO, "radio"); 2185 if (NULL == dev->radio_dev) { 2186 em28xx_errdev("cannot allocate video_device.\n"); 2187 goto fail_unreg; 2188 } 2189 retval = video_register_device(dev->radio_dev, VFL_TYPE_RADIO, 2190 radio_nr[dev->devno]); 2191 if (retval < 0) { 2192 em28xx_errdev("can't register radio device\n"); 2193 goto fail_unreg; 2194 } 2195 em28xx_info("Registered radio device as /dev/radio%d\n", 2196 dev->radio_dev->minor & 0x1f); 2197 } 2198 2199 /* init video dma queues */ 2200 INIT_LIST_HEAD(&dev->vidq.active); 2201 INIT_LIST_HEAD(&dev->vidq.queued); 2202 2203 2204 if (dev->has_msp34xx) { 2205 /* Send a reset to other chips via gpio */ 2206 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1); 2207 msleep(3); 2208 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1); 2209 msleep(3); 2210 } 2211 2212 video_mux(dev, 0); 2213 2214 em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n", 2215 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN, 2216 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN); 2217 2218 mutex_lock(&em28xx_extension_devlist_lock); 2219 if (!list_empty(&em28xx_extension_devlist)) { 2220 list_for_each_entry(ops, &em28xx_extension_devlist, next) { 2221 if (ops->id) 2222 ops->init(dev); 2223 } 2224 } 2225 mutex_unlock(&em28xx_extension_devlist_lock); 2226 2227 return 0; 2228 2229fail_unreg: 2230 em28xx_release_resources(dev); 2231 mutex_unlock(&dev->lock); 2232 kfree(dev); 2233 return retval; 2234} 2235 2236#if defined(CONFIG_MODULES) && defined(MODULE) 2237static void request_module_async(struct work_struct *work) 2238{ 2239 struct em28xx *dev = container_of(work, 2240 struct em28xx, request_module_wk); 2241 2242 if (dev->has_audio_class) 2243 request_module("snd-usb-audio"); 2244 else 2245 request_module("em28xx-alsa"); 2246 2247 if (dev->has_dvb) 2248 request_module("em28xx-dvb"); 2249} 2250 2251static void request_modules(struct em28xx *dev) 2252{ 2253 INIT_WORK(&dev->request_module_wk, request_module_async); 2254 schedule_work(&dev->request_module_wk); 2255} 2256#else 2257#define request_modules(dev) 2258#endif /* CONFIG_MODULES */ 2259 2260/* 2261 * em28xx_usb_probe() 2262 * checks for supported devices 2263 */ 2264static int em28xx_usb_probe(struct usb_interface *interface, 2265 const struct usb_device_id *id) 2266{ 2267 const struct usb_endpoint_descriptor *endpoint; 2268 struct usb_device *udev; 2269 struct usb_interface *uif; 2270 struct em28xx *dev = NULL; 2271 int retval = -ENODEV; 2272 int i, nr, ifnum; 2273 2274 udev = usb_get_dev(interface_to_usbdev(interface)); 2275 ifnum = interface->altsetting[0].desc.bInterfaceNumber; 2276 2277 /* Check to see next free device and mark as used */ 2278 nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS); 2279 em28xx_devused|=1<<nr; 2280 2281 /* Don't register audio interfaces */ 2282 if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) { 2283 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n", 2284 udev->descriptor.idVendor,udev->descriptor.idProduct, 2285 ifnum, 2286 interface->altsetting[0].desc.bInterfaceClass); 2287 2288 em28xx_devused&=~(1<<nr); 2289 return -ENODEV; 2290 } 2291 2292 em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n", 2293 udev->descriptor.idVendor,udev->descriptor.idProduct, 2294 ifnum, 2295 interface->altsetting[0].desc.bInterfaceClass); 2296 2297 endpoint = &interface->cur_altsetting->endpoint[1].desc; 2298 2299 /* check if the device has the iso in endpoint at the correct place */ 2300 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 2301 USB_ENDPOINT_XFER_ISOC) { 2302 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n"); 2303 em28xx_devused&=~(1<<nr); 2304 return -ENODEV; 2305 } 2306 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) { 2307 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n"); 2308 em28xx_devused&=~(1<<nr); 2309 return -ENODEV; 2310 } 2311 2312 if (nr >= EM28XX_MAXBOARDS) { 2313 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS); 2314 em28xx_devused&=~(1<<nr); 2315 return -ENOMEM; 2316 } 2317 2318 /* allocate memory for our device state and initialize it */ 2319 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 2320 if (dev == NULL) { 2321 em28xx_err(DRIVER_NAME ": out of memory!\n"); 2322 em28xx_devused&=~(1<<nr); 2323 return -ENOMEM; 2324 } 2325 2326 snprintf(dev->name, 29, "em28xx #%d", nr); 2327 dev->devno = nr; 2328 dev->model = id->driver_info; 2329 dev->alt = -1; 2330 2331 /* Checks if audio is provided by some interface */ 2332 for (i = 0; i < udev->config->desc.bNumInterfaces; i++) { 2333 uif = udev->config->interface[i]; 2334 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) { 2335 dev->has_audio_class = 1; 2336 break; 2337 } 2338 } 2339 2340 printk(KERN_INFO DRIVER_NAME " %s usb audio class\n", 2341 dev->has_audio_class ? "Has" : "Doesn't have"); 2342 2343 /* compute alternate max packet sizes */ 2344 uif = udev->actconfig->interface[0]; 2345 2346 dev->num_alt=uif->num_altsetting; 2347 em28xx_info("Alternate settings: %i\n",dev->num_alt); 2348// dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)* 2349 dev->alt_max_pkt_size = kmalloc(32* 2350 dev->num_alt,GFP_KERNEL); 2351 if (dev->alt_max_pkt_size == NULL) { 2352 em28xx_errdev("out of memory!\n"); 2353 em28xx_devused&=~(1<<nr); 2354 kfree(dev); 2355 return -ENOMEM; 2356 } 2357 2358 for (i = 0; i < dev->num_alt ; i++) { 2359 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc. 2360 wMaxPacketSize); 2361 dev->alt_max_pkt_size[i] = 2362 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1); 2363 em28xx_info("Alternate setting %i, max size= %i\n",i, 2364 dev->alt_max_pkt_size[i]); 2365 } 2366 2367 if ((card[nr]>=0)&&(card[nr]<em28xx_bcount)) 2368 dev->model = card[nr]; 2369 2370 /* allocate device struct */ 2371 retval = em28xx_init_dev(&dev, udev, nr); 2372 if (retval) 2373 return retval; 2374 2375 em28xx_info("Found %s\n", em28xx_boards[dev->model].name); 2376 2377 /* save our data pointer in this interface device */ 2378 usb_set_intfdata(interface, dev); 2379 2380#if defined(CONFIG_VIDEO_EM28XX_DVB) || defined(CONFIG_VIDEO_EM28XX_DVB_MODULE) 2381 dev->qops = kmalloc(sizeof(em28xx_video_qops), GFP_KERNEL); 2382 memcpy(dev->qops, &em28xx_video_qops, sizeof(em28xx_video_qops)); 2383#endif 2384 2385 request_modules(dev); 2386 2387 return 0; 2388} 2389 2390/* 2391 * em28xx_usb_disconnect() 2392 * called when the device gets diconencted 2393 * video device will be unregistered on v4l2_close in case it is still open 2394 */ 2395static void em28xx_usb_disconnect(struct usb_interface *interface) 2396{ 2397 struct em28xx *dev; 2398 struct em28xx_ops *ops = NULL; 2399 2400 dev = usb_get_intfdata(interface); 2401 usb_set_intfdata(interface, NULL); 2402 2403 if (!dev) 2404 return; 2405 2406 em28xx_info("disconnecting %s\n", dev->vdev->name); 2407 2408 /* wait until all current v4l2 io is finished then deallocate resources */ 2409 mutex_lock(&dev->lock); 2410 2411 wake_up_interruptible_all(&dev->open); 2412 2413 if (dev->users) { 2414 em28xx_warn 2415 ("device /dev/video%d is open! Deregistration and memory " 2416 "deallocation are deferred on close.\n", 2417 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN); 2418 2419 dev->state |= DEV_MISCONFIGURED; 2420 em28xx_uninit_isoc(dev); 2421 dev->state |= DEV_DISCONNECTED; 2422 wake_up_interruptible(&dev->wait_frame); 2423 wake_up_interruptible(&dev->wait_stream); 2424 } else { 2425 dev->state |= DEV_DISCONNECTED; 2426 em28xx_release_resources(dev); 2427 } 2428 mutex_unlock(&dev->lock); 2429 2430 mutex_lock(&em28xx_extension_devlist_lock); 2431 if (!list_empty(&em28xx_extension_devlist)) { 2432 list_for_each_entry(ops, &em28xx_extension_devlist, next) { 2433 ops->fini(dev); 2434 } 2435 } 2436 mutex_unlock(&em28xx_extension_devlist_lock); 2437 2438 if (!dev->users) { 2439 kfree(dev->alt_max_pkt_size); 2440 kfree(dev); 2441 } 2442} 2443 2444static struct usb_driver em28xx_usb_driver = { 2445 .name = "em28xx", 2446 .probe = em28xx_usb_probe, 2447 .disconnect = em28xx_usb_disconnect, 2448 .id_table = em28xx_id_table, 2449}; 2450 2451static int __init em28xx_module_init(void) 2452{ 2453 int result; 2454 2455 printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n", 2456 (EM28XX_VERSION_CODE >> 16) & 0xff, 2457 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff); 2458#ifdef SNAPSHOT 2459 printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n", 2460 SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100); 2461#endif 2462 2463 /* register this driver with the USB subsystem */ 2464 result = usb_register(&em28xx_usb_driver); 2465 if (result) 2466 em28xx_err(DRIVER_NAME 2467 " usb_register failed. Error number %d.\n", result); 2468 2469 return result; 2470} 2471 2472static void __exit em28xx_module_exit(void) 2473{ 2474 /* deregister this driver with the USB subsystem */ 2475 usb_deregister(&em28xx_usb_driver); 2476} 2477 2478module_init(em28xx_module_init); 2479module_exit(em28xx_module_exit); 2480