1 /* 2 * Main USB camera driver 3 * 4 * Copyright (C) 2008-2011 Jean-François Moine <http://moinejf.free.fr> 5 * 6 * Camera button input handling by Márton Németh 7 * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu> 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License as published by the 11 * Free Software Foundation; either version 2 of the License, or (at your 12 * option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, but 15 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 17 * for more details. 18 */ 19 20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 21 22 #define GSPCA_VERSION "2.14.0" 23 24 #include <linux/init.h> 25 #include <linux/fs.h> 26 #include <linux/vmalloc.h> 27 #include <linux/sched.h> 28 #include <linux/slab.h> 29 #include <linux/mm.h> 30 #include <linux/string.h> 31 #include <linux/pagemap.h> 32 #include <linux/io.h> 33 #include <asm/page.h> 34 #include <linux/uaccess.h> 35 #include <linux/ktime.h> 36 #include <media/v4l2-ioctl.h> 37 #include <media/v4l2-ctrls.h> 38 #include <media/v4l2-fh.h> 39 #include <media/v4l2-event.h> 40 41 #include "gspca.h" 42 43 #if IS_ENABLED(CONFIG_INPUT) 44 #include <linux/input.h> 45 #include <linux/usb/input.h> 46 #endif 47 48 /* global values */ 49 #define DEF_NURBS 3 /* default number of URBs */ 50 #if DEF_NURBS > MAX_NURBS 51 #error "DEF_NURBS too big" 52 #endif 53 54 MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>"); 55 MODULE_DESCRIPTION("GSPCA USB Camera Driver"); 56 MODULE_LICENSE("GPL"); 57 MODULE_VERSION(GSPCA_VERSION); 58 59 int gspca_debug; 60 EXPORT_SYMBOL(gspca_debug); 61 62 static void PDEBUG_MODE(struct gspca_dev *gspca_dev, int debug, char *txt, 63 __u32 pixfmt, int w, int h) 64 { 65 if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') { 66 gspca_dbg(gspca_dev, debug, "%s %c%c%c%c %dx%d\n", 67 txt, 68 pixfmt & 0xff, 69 (pixfmt >> 8) & 0xff, 70 (pixfmt >> 16) & 0xff, 71 pixfmt >> 24, 72 w, h); 73 } else { 74 gspca_dbg(gspca_dev, debug, "%s 0x%08x %dx%d\n", 75 txt, 76 pixfmt, 77 w, h); 78 } 79 } 80 81 /* specific memory types - !! should be different from V4L2_MEMORY_xxx */ 82 #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */ 83 #define GSPCA_MEMORY_READ 7 84 85 /* 86 * Input and interrupt endpoint handling functions 87 */ 88 #if IS_ENABLED(CONFIG_INPUT) 89 static void int_irq(struct urb *urb) 90 { 91 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; 92 int ret; 93 94 ret = urb->status; 95 switch (ret) { 96 case 0: 97 if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev, 98 urb->transfer_buffer, urb->actual_length) < 0) { 99 gspca_err(gspca_dev, "Unknown packet received\n"); 100 } 101 break; 102 103 case -ENOENT: 104 case -ECONNRESET: 105 case -ENODEV: 106 case -ESHUTDOWN: 107 /* Stop is requested either by software or hardware is gone, 108 * keep the ret value non-zero and don't resubmit later. 109 */ 110 break; 111 112 default: 113 gspca_err(gspca_dev, "URB error %i, resubmitting\n", 114 urb->status); 115 urb->status = 0; 116 ret = 0; 117 } 118 119 if (ret == 0) { 120 ret = usb_submit_urb(urb, GFP_ATOMIC); 121 if (ret < 0) 122 pr_err("Resubmit URB failed with error %i\n", ret); 123 } 124 } 125 126 static int gspca_input_connect(struct gspca_dev *dev) 127 { 128 struct input_dev *input_dev; 129 int err = 0; 130 131 dev->input_dev = NULL; 132 if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) { 133 input_dev = input_allocate_device(); 134 if (!input_dev) 135 return -ENOMEM; 136 137 usb_make_path(dev->dev, dev->phys, sizeof(dev->phys)); 138 strlcat(dev->phys, "/input0", sizeof(dev->phys)); 139 140 input_dev->name = dev->sd_desc->name; 141 input_dev->phys = dev->phys; 142 143 usb_to_input_id(dev->dev, &input_dev->id); 144 145 input_dev->evbit[0] = BIT_MASK(EV_KEY); 146 input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA); 147 input_dev->dev.parent = &dev->dev->dev; 148 149 err = input_register_device(input_dev); 150 if (err) { 151 pr_err("Input device registration failed with error %i\n", 152 err); 153 input_dev->dev.parent = NULL; 154 input_free_device(input_dev); 155 } else { 156 dev->input_dev = input_dev; 157 } 158 } 159 160 return err; 161 } 162 163 static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev, 164 struct usb_endpoint_descriptor *ep) 165 { 166 unsigned int buffer_len; 167 int interval; 168 struct urb *urb; 169 struct usb_device *dev; 170 void *buffer = NULL; 171 int ret = -EINVAL; 172 173 buffer_len = le16_to_cpu(ep->wMaxPacketSize); 174 interval = ep->bInterval; 175 gspca_dbg(gspca_dev, D_CONF, "found int in endpoint: 0x%x, buffer_len=%u, interval=%u\n", 176 ep->bEndpointAddress, buffer_len, interval); 177 178 dev = gspca_dev->dev; 179 180 urb = usb_alloc_urb(0, GFP_KERNEL); 181 if (!urb) { 182 ret = -ENOMEM; 183 goto error; 184 } 185 186 buffer = usb_alloc_coherent(dev, buffer_len, 187 GFP_KERNEL, &urb->transfer_dma); 188 if (!buffer) { 189 ret = -ENOMEM; 190 goto error_buffer; 191 } 192 usb_fill_int_urb(urb, dev, 193 usb_rcvintpipe(dev, ep->bEndpointAddress), 194 buffer, buffer_len, 195 int_irq, (void *)gspca_dev, interval); 196 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 197 ret = usb_submit_urb(urb, GFP_KERNEL); 198 if (ret < 0) { 199 gspca_err(gspca_dev, "submit int URB failed with error %i\n", 200 ret); 201 goto error_submit; 202 } 203 gspca_dev->int_urb = urb; 204 return ret; 205 206 error_submit: 207 usb_free_coherent(dev, 208 urb->transfer_buffer_length, 209 urb->transfer_buffer, 210 urb->transfer_dma); 211 error_buffer: 212 usb_free_urb(urb); 213 error: 214 return ret; 215 } 216 217 static void gspca_input_create_urb(struct gspca_dev *gspca_dev) 218 { 219 struct usb_interface *intf; 220 struct usb_host_interface *intf_desc; 221 struct usb_endpoint_descriptor *ep; 222 int i; 223 224 if (gspca_dev->sd_desc->int_pkt_scan) { 225 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); 226 intf_desc = intf->cur_altsetting; 227 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { 228 ep = &intf_desc->endpoint[i].desc; 229 if (usb_endpoint_dir_in(ep) && 230 usb_endpoint_xfer_int(ep)) { 231 232 alloc_and_submit_int_urb(gspca_dev, ep); 233 break; 234 } 235 } 236 } 237 } 238 239 static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) 240 { 241 struct urb *urb; 242 243 urb = gspca_dev->int_urb; 244 if (urb) { 245 gspca_dev->int_urb = NULL; 246 usb_kill_urb(urb); 247 usb_free_coherent(gspca_dev->dev, 248 urb->transfer_buffer_length, 249 urb->transfer_buffer, 250 urb->transfer_dma); 251 usb_free_urb(urb); 252 } 253 } 254 #else 255 static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) 256 { 257 } 258 259 static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev) 260 { 261 } 262 263 static inline int gspca_input_connect(struct gspca_dev *dev) 264 { 265 return 0; 266 } 267 #endif 268 269 /* 270 * fill a video frame from an URB and resubmit 271 */ 272 static void fill_frame(struct gspca_dev *gspca_dev, 273 struct urb *urb) 274 { 275 u8 *data; /* address of data in the iso message */ 276 int i, len, st; 277 cam_pkt_op pkt_scan; 278 279 if (urb->status != 0) { 280 if (urb->status == -ESHUTDOWN) 281 return; /* disconnection */ 282 #ifdef CONFIG_PM 283 if (gspca_dev->frozen) 284 return; 285 #endif 286 gspca_err(gspca_dev, "urb status: %d\n", urb->status); 287 urb->status = 0; 288 goto resubmit; 289 } 290 pkt_scan = gspca_dev->sd_desc->pkt_scan; 291 for (i = 0; i < urb->number_of_packets; i++) { 292 len = urb->iso_frame_desc[i].actual_length; 293 294 /* check the packet status and length */ 295 st = urb->iso_frame_desc[i].status; 296 if (st) { 297 pr_err("ISOC data error: [%d] len=%d, status=%d\n", 298 i, len, st); 299 gspca_dev->last_packet_type = DISCARD_PACKET; 300 continue; 301 } 302 if (len == 0) { 303 if (gspca_dev->empty_packet == 0) 304 gspca_dev->empty_packet = 1; 305 continue; 306 } 307 308 /* let the packet be analyzed by the subdriver */ 309 gspca_dbg(gspca_dev, D_PACK, "packet [%d] o:%d l:%d\n", 310 i, urb->iso_frame_desc[i].offset, len); 311 data = (u8 *) urb->transfer_buffer 312 + urb->iso_frame_desc[i].offset; 313 pkt_scan(gspca_dev, data, len); 314 } 315 316 resubmit: 317 /* resubmit the URB */ 318 st = usb_submit_urb(urb, GFP_ATOMIC); 319 if (st < 0) 320 pr_err("usb_submit_urb() ret %d\n", st); 321 } 322 323 /* 324 * ISOC message interrupt from the USB device 325 * 326 * Analyse each packet and call the subdriver for copy to the frame buffer. 327 */ 328 static void isoc_irq(struct urb *urb) 329 { 330 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; 331 332 gspca_dbg(gspca_dev, D_PACK, "isoc irq\n"); 333 if (!vb2_start_streaming_called(&gspca_dev->queue)) 334 return; 335 fill_frame(gspca_dev, urb); 336 } 337 338 /* 339 * bulk message interrupt from the USB device 340 */ 341 static void bulk_irq(struct urb *urb) 342 { 343 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; 344 int st; 345 346 gspca_dbg(gspca_dev, D_PACK, "bulk irq\n"); 347 if (!vb2_start_streaming_called(&gspca_dev->queue)) 348 return; 349 switch (urb->status) { 350 case 0: 351 break; 352 case -ESHUTDOWN: 353 return; /* disconnection */ 354 default: 355 #ifdef CONFIG_PM 356 if (gspca_dev->frozen) 357 return; 358 #endif 359 gspca_err(gspca_dev, "urb status: %d\n", urb->status); 360 urb->status = 0; 361 goto resubmit; 362 } 363 364 gspca_dbg(gspca_dev, D_PACK, "packet l:%d\n", urb->actual_length); 365 gspca_dev->sd_desc->pkt_scan(gspca_dev, 366 urb->transfer_buffer, 367 urb->actual_length); 368 369 resubmit: 370 /* resubmit the URB */ 371 if (gspca_dev->cam.bulk_nurbs != 0) { 372 st = usb_submit_urb(urb, GFP_ATOMIC); 373 if (st < 0) 374 pr_err("usb_submit_urb() ret %d\n", st); 375 } 376 } 377 378 /* 379 * add data to the current frame 380 * 381 * This function is called by the subdrivers at interrupt level. 382 * 383 * To build a frame, these ones must add 384 * - one FIRST_PACKET 385 * - 0 or many INTER_PACKETs 386 * - one LAST_PACKET 387 * DISCARD_PACKET invalidates the whole frame. 388 */ 389 void gspca_frame_add(struct gspca_dev *gspca_dev, 390 enum gspca_packet_type packet_type, 391 const u8 *data, 392 int len) 393 { 394 struct gspca_buffer *buf; 395 unsigned long flags; 396 397 gspca_dbg(gspca_dev, D_PACK, "add t:%d l:%d\n", packet_type, len); 398 399 spin_lock_irqsave(&gspca_dev->qlock, flags); 400 buf = list_first_entry_or_null(&gspca_dev->buf_list, 401 typeof(*buf), list); 402 spin_unlock_irqrestore(&gspca_dev->qlock, flags); 403 404 if (packet_type == FIRST_PACKET) { 405 /* if there is no queued buffer, discard the whole frame */ 406 if (!buf) { 407 gspca_dev->last_packet_type = DISCARD_PACKET; 408 gspca_dev->sequence++; 409 return; 410 } 411 gspca_dev->image = vb2_plane_vaddr(&buf->vb.vb2_buf, 0); 412 gspca_dev->image_len = 0; 413 } else { 414 switch (gspca_dev->last_packet_type) { 415 case DISCARD_PACKET: 416 if (packet_type == LAST_PACKET) { 417 gspca_dev->last_packet_type = packet_type; 418 gspca_dev->image = NULL; 419 gspca_dev->image_len = 0; 420 } 421 return; 422 case LAST_PACKET: 423 return; 424 } 425 } 426 427 /* append the packet to the frame buffer */ 428 if (len > 0) { 429 if (gspca_dev->image_len + len > PAGE_ALIGN(gspca_dev->pixfmt.sizeimage)) { 430 gspca_err(gspca_dev, "frame overflow %d > %d\n", 431 gspca_dev->image_len + len, 432 PAGE_ALIGN(gspca_dev->pixfmt.sizeimage)); 433 packet_type = DISCARD_PACKET; 434 } else { 435 /* !! image is NULL only when last pkt is LAST or DISCARD 436 if (gspca_dev->image == NULL) { 437 pr_err("gspca_frame_add() image == NULL\n"); 438 return; 439 } 440 */ 441 memcpy(gspca_dev->image + gspca_dev->image_len, 442 data, len); 443 gspca_dev->image_len += len; 444 } 445 } 446 gspca_dev->last_packet_type = packet_type; 447 448 /* if last packet, invalidate packet concatenation until 449 * next first packet, wake up the application and advance 450 * in the queue */ 451 if (packet_type == LAST_PACKET) { 452 spin_lock_irqsave(&gspca_dev->qlock, flags); 453 list_del(&buf->list); 454 spin_unlock_irqrestore(&gspca_dev->qlock, flags); 455 buf->vb.vb2_buf.timestamp = ktime_get_ns(); 456 vb2_set_plane_payload(&buf->vb.vb2_buf, 0, 457 gspca_dev->image_len); 458 buf->vb.sequence = gspca_dev->sequence++; 459 buf->vb.field = V4L2_FIELD_NONE; 460 gspca_dbg(gspca_dev, D_FRAM, "frame complete len:%d\n", 461 gspca_dev->image_len); 462 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE); 463 gspca_dev->image = NULL; 464 gspca_dev->image_len = 0; 465 } 466 } 467 EXPORT_SYMBOL(gspca_frame_add); 468 469 static void destroy_urbs(struct gspca_dev *gspca_dev) 470 { 471 struct urb *urb; 472 unsigned int i; 473 474 gspca_dbg(gspca_dev, D_STREAM, "kill transfer\n"); 475 476 /* Killing all URBs guarantee that no URB completion 477 * handler is running. Therefore, there shouldn't 478 * be anyone trying to access gspca_dev->urb[i] 479 */ 480 for (i = 0; i < MAX_NURBS; i++) 481 usb_kill_urb(gspca_dev->urb[i]); 482 483 gspca_dbg(gspca_dev, D_STREAM, "releasing urbs\n"); 484 for (i = 0; i < MAX_NURBS; i++) { 485 urb = gspca_dev->urb[i]; 486 if (!urb) 487 continue; 488 gspca_dev->urb[i] = NULL; 489 usb_free_coherent(gspca_dev->dev, 490 urb->transfer_buffer_length, 491 urb->transfer_buffer, 492 urb->transfer_dma); 493 usb_free_urb(urb); 494 } 495 } 496 497 static int gspca_set_alt0(struct gspca_dev *gspca_dev) 498 { 499 int ret; 500 501 if (gspca_dev->alt == 0) 502 return 0; 503 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0); 504 if (ret < 0) 505 pr_err("set alt 0 err %d\n", ret); 506 return ret; 507 } 508 509 /* 510 * look for an input transfer endpoint in an alternate setting. 511 * 512 * If xfer_ep is invalid, return the first valid ep found, otherwise 513 * look for exactly the ep with address equal to xfer_ep. 514 */ 515 static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, 516 int xfer, int xfer_ep) 517 { 518 struct usb_host_endpoint *ep; 519 int i, attr; 520 521 for (i = 0; i < alt->desc.bNumEndpoints; i++) { 522 ep = &alt->endpoint[i]; 523 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; 524 if (attr == xfer 525 && ep->desc.wMaxPacketSize != 0 526 && usb_endpoint_dir_in(&ep->desc) 527 && (xfer_ep < 0 || ep->desc.bEndpointAddress == xfer_ep)) 528 return ep; 529 } 530 return NULL; 531 } 532 533 /* compute the minimum bandwidth for the current transfer */ 534 static u32 which_bandwidth(struct gspca_dev *gspca_dev) 535 { 536 u32 bandwidth; 537 538 /* get the (max) image size */ 539 bandwidth = gspca_dev->pixfmt.sizeimage; 540 541 /* if the image is compressed, estimate its mean size */ 542 if (!gspca_dev->cam.needs_full_bandwidth && 543 bandwidth < gspca_dev->pixfmt.width * 544 gspca_dev->pixfmt.height) 545 bandwidth = bandwidth * 3 / 8; /* 0.375 */ 546 547 /* estimate the frame rate */ 548 if (gspca_dev->sd_desc->get_streamparm) { 549 struct v4l2_streamparm parm; 550 551 gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm); 552 bandwidth *= parm.parm.capture.timeperframe.denominator; 553 bandwidth /= parm.parm.capture.timeperframe.numerator; 554 } else { 555 556 /* don't hope more than 15 fps with USB 1.1 and 557 * image resolution >= 640x480 */ 558 if (gspca_dev->pixfmt.width >= 640 559 && gspca_dev->dev->speed == USB_SPEED_FULL) 560 bandwidth *= 15; /* 15 fps */ 561 else 562 bandwidth *= 30; /* 30 fps */ 563 } 564 565 gspca_dbg(gspca_dev, D_STREAM, "min bandwidth: %d\n", bandwidth); 566 return bandwidth; 567 } 568 569 /* endpoint table */ 570 #define MAX_ALT 16 571 struct ep_tb_s { 572 u32 alt; 573 u32 bandwidth; 574 }; 575 576 /* 577 * build the table of the endpoints 578 * and compute the minimum bandwidth for the image transfer 579 */ 580 static int build_isoc_ep_tb(struct gspca_dev *gspca_dev, 581 struct usb_interface *intf, 582 struct ep_tb_s *ep_tb) 583 { 584 struct usb_host_endpoint *ep; 585 int i, j, nbalt, psize, found; 586 u32 bandwidth, last_bw; 587 588 nbalt = intf->num_altsetting; 589 if (nbalt > MAX_ALT) 590 nbalt = MAX_ALT; /* fixme: should warn */ 591 592 /* build the endpoint table */ 593 i = 0; 594 last_bw = 0; 595 for (;;) { 596 ep_tb->bandwidth = 2000 * 2000 * 120; 597 found = 0; 598 for (j = 0; j < nbalt; j++) { 599 ep = alt_xfer(&intf->altsetting[j], 600 USB_ENDPOINT_XFER_ISOC, 601 gspca_dev->xfer_ep); 602 if (ep == NULL) 603 continue; 604 if (ep->desc.bInterval == 0) { 605 pr_err("alt %d iso endp with 0 interval\n", j); 606 continue; 607 } 608 psize = le16_to_cpu(ep->desc.wMaxPacketSize); 609 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); 610 bandwidth = psize * 1000; 611 if (gspca_dev->dev->speed == USB_SPEED_HIGH 612 || gspca_dev->dev->speed >= USB_SPEED_SUPER) 613 bandwidth *= 8; 614 bandwidth /= 1 << (ep->desc.bInterval - 1); 615 if (bandwidth <= last_bw) 616 continue; 617 if (bandwidth < ep_tb->bandwidth) { 618 ep_tb->bandwidth = bandwidth; 619 ep_tb->alt = j; 620 found = 1; 621 } 622 } 623 if (!found) 624 break; 625 gspca_dbg(gspca_dev, D_STREAM, "alt %d bandwidth %d\n", 626 ep_tb->alt, ep_tb->bandwidth); 627 last_bw = ep_tb->bandwidth; 628 i++; 629 ep_tb++; 630 } 631 632 /* 633 * If the camera: 634 * has a usb audio class interface (a built in usb mic); and 635 * is a usb 1 full speed device; and 636 * uses the max full speed iso bandwidth; and 637 * and has more than 1 alt setting 638 * then skip the highest alt setting to spare bandwidth for the mic 639 */ 640 if (gspca_dev->audio && 641 gspca_dev->dev->speed == USB_SPEED_FULL && 642 last_bw >= 1000000 && 643 i > 1) { 644 gspca_dbg(gspca_dev, D_STREAM, "dev has usb audio, skipping highest alt\n"); 645 i--; 646 ep_tb--; 647 } 648 649 /* get the requested bandwidth and start at the highest atlsetting */ 650 bandwidth = which_bandwidth(gspca_dev); 651 ep_tb--; 652 while (i > 1) { 653 ep_tb--; 654 if (ep_tb->bandwidth < bandwidth) 655 break; 656 i--; 657 } 658 return i; 659 } 660 661 /* 662 * create the URBs for image transfer 663 */ 664 static int create_urbs(struct gspca_dev *gspca_dev, 665 struct usb_host_endpoint *ep) 666 { 667 struct urb *urb; 668 int n, nurbs, i, psize, npkt, bsize; 669 670 /* calculate the packet size and the number of packets */ 671 psize = le16_to_cpu(ep->desc.wMaxPacketSize); 672 673 if (!gspca_dev->cam.bulk) { /* isoc */ 674 675 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ 676 if (gspca_dev->pkt_size == 0) 677 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); 678 else 679 psize = gspca_dev->pkt_size; 680 npkt = gspca_dev->cam.npkt; 681 if (npkt == 0) 682 npkt = 32; /* default value */ 683 bsize = psize * npkt; 684 gspca_dbg(gspca_dev, D_STREAM, 685 "isoc %d pkts size %d = bsize:%d\n", 686 npkt, psize, bsize); 687 nurbs = DEF_NURBS; 688 } else { /* bulk */ 689 npkt = 0; 690 bsize = gspca_dev->cam.bulk_size; 691 if (bsize == 0) 692 bsize = psize; 693 gspca_dbg(gspca_dev, D_STREAM, "bulk bsize:%d\n", bsize); 694 if (gspca_dev->cam.bulk_nurbs != 0) 695 nurbs = gspca_dev->cam.bulk_nurbs; 696 else 697 nurbs = 1; 698 } 699 700 for (n = 0; n < nurbs; n++) { 701 urb = usb_alloc_urb(npkt, GFP_KERNEL); 702 if (!urb) 703 return -ENOMEM; 704 gspca_dev->urb[n] = urb; 705 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev, 706 bsize, 707 GFP_KERNEL, 708 &urb->transfer_dma); 709 710 if (urb->transfer_buffer == NULL) { 711 pr_err("usb_alloc_coherent failed\n"); 712 return -ENOMEM; 713 } 714 urb->dev = gspca_dev->dev; 715 urb->context = gspca_dev; 716 urb->transfer_buffer_length = bsize; 717 if (npkt != 0) { /* ISOC */ 718 urb->pipe = usb_rcvisocpipe(gspca_dev->dev, 719 ep->desc.bEndpointAddress); 720 urb->transfer_flags = URB_ISO_ASAP 721 | URB_NO_TRANSFER_DMA_MAP; 722 urb->interval = 1 << (ep->desc.bInterval - 1); 723 urb->complete = isoc_irq; 724 urb->number_of_packets = npkt; 725 for (i = 0; i < npkt; i++) { 726 urb->iso_frame_desc[i].length = psize; 727 urb->iso_frame_desc[i].offset = psize * i; 728 } 729 } else { /* bulk */ 730 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev, 731 ep->desc.bEndpointAddress); 732 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; 733 urb->complete = bulk_irq; 734 } 735 } 736 return 0; 737 } 738 739 /* Note: both the queue and the usb locks should be held when calling this */ 740 static void gspca_stream_off(struct gspca_dev *gspca_dev) 741 { 742 gspca_dev->streaming = false; 743 gspca_dev->usb_err = 0; 744 if (gspca_dev->sd_desc->stopN) 745 gspca_dev->sd_desc->stopN(gspca_dev); 746 destroy_urbs(gspca_dev); 747 gspca_input_destroy_urb(gspca_dev); 748 gspca_set_alt0(gspca_dev); 749 if (gspca_dev->present) 750 gspca_input_create_urb(gspca_dev); 751 if (gspca_dev->sd_desc->stop0) 752 gspca_dev->sd_desc->stop0(gspca_dev); 753 gspca_dbg(gspca_dev, D_STREAM, "stream off OK\n"); 754 } 755 756 /* 757 * start the USB transfer 758 */ 759 static int gspca_init_transfer(struct gspca_dev *gspca_dev) 760 { 761 struct usb_interface *intf; 762 struct usb_host_endpoint *ep; 763 struct urb *urb; 764 struct ep_tb_s ep_tb[MAX_ALT]; 765 int n, ret, xfer, alt, alt_idx; 766 767 /* reset the streaming variables */ 768 gspca_dev->image = NULL; 769 gspca_dev->image_len = 0; 770 gspca_dev->last_packet_type = DISCARD_PACKET; 771 772 gspca_dev->usb_err = 0; 773 774 /* do the specific subdriver stuff before endpoint selection */ 775 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); 776 gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0; 777 if (gspca_dev->sd_desc->isoc_init) { 778 ret = gspca_dev->sd_desc->isoc_init(gspca_dev); 779 if (ret < 0) 780 return ret; 781 } 782 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK 783 : USB_ENDPOINT_XFER_ISOC; 784 785 /* if bulk or the subdriver forced an altsetting, get the endpoint */ 786 if (gspca_dev->alt != 0) { 787 gspca_dev->alt--; /* (previous version compatibility) */ 788 ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer, 789 gspca_dev->xfer_ep); 790 if (ep == NULL) { 791 pr_err("bad altsetting %d\n", gspca_dev->alt); 792 return -EIO; 793 } 794 ep_tb[0].alt = gspca_dev->alt; 795 alt_idx = 1; 796 } else { 797 /* else, compute the minimum bandwidth 798 * and build the endpoint table */ 799 alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb); 800 if (alt_idx <= 0) { 801 pr_err("no transfer endpoint found\n"); 802 return -EIO; 803 } 804 } 805 806 /* set the highest alternate setting and 807 * loop until urb submit succeeds */ 808 gspca_input_destroy_urb(gspca_dev); 809 810 gspca_dev->alt = ep_tb[--alt_idx].alt; 811 alt = -1; 812 for (;;) { 813 if (alt != gspca_dev->alt) { 814 alt = gspca_dev->alt; 815 if (intf->num_altsetting > 1) { 816 ret = usb_set_interface(gspca_dev->dev, 817 gspca_dev->iface, 818 alt); 819 if (ret < 0) { 820 if (ret == -ENOSPC) 821 goto retry; /*fixme: ugly*/ 822 pr_err("set alt %d err %d\n", alt, ret); 823 goto out; 824 } 825 } 826 } 827 if (!gspca_dev->cam.no_urb_create) { 828 gspca_dbg(gspca_dev, D_STREAM, "init transfer alt %d\n", 829 alt); 830 ret = create_urbs(gspca_dev, 831 alt_xfer(&intf->altsetting[alt], xfer, 832 gspca_dev->xfer_ep)); 833 if (ret < 0) { 834 destroy_urbs(gspca_dev); 835 goto out; 836 } 837 } 838 839 /* clear the bulk endpoint */ 840 if (gspca_dev->cam.bulk) 841 usb_clear_halt(gspca_dev->dev, 842 gspca_dev->urb[0]->pipe); 843 844 /* start the cam */ 845 ret = gspca_dev->sd_desc->start(gspca_dev); 846 if (ret < 0) { 847 destroy_urbs(gspca_dev); 848 goto out; 849 } 850 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler); 851 gspca_dev->streaming = true; 852 853 /* some bulk transfers are started by the subdriver */ 854 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0) 855 break; 856 857 /* submit the URBs */ 858 for (n = 0; n < MAX_NURBS; n++) { 859 urb = gspca_dev->urb[n]; 860 if (urb == NULL) 861 break; 862 ret = usb_submit_urb(urb, GFP_KERNEL); 863 if (ret < 0) 864 break; 865 } 866 if (ret >= 0) 867 break; /* transfer is started */ 868 869 /* something when wrong 870 * stop the webcam and free the transfer resources */ 871 gspca_stream_off(gspca_dev); 872 if (ret != -ENOSPC) { 873 pr_err("usb_submit_urb alt %d err %d\n", 874 gspca_dev->alt, ret); 875 goto out; 876 } 877 878 /* the bandwidth is not wide enough 879 * negotiate or try a lower alternate setting */ 880 retry: 881 gspca_err(gspca_dev, "alt %d - bandwidth not wide enough, trying again\n", 882 alt); 883 msleep(20); /* wait for kill complete */ 884 if (gspca_dev->sd_desc->isoc_nego) { 885 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev); 886 if (ret < 0) 887 goto out; 888 } else { 889 if (alt_idx <= 0) { 890 pr_err("no transfer endpoint found\n"); 891 ret = -EIO; 892 goto out; 893 } 894 gspca_dev->alt = ep_tb[--alt_idx].alt; 895 } 896 } 897 out: 898 gspca_input_create_urb(gspca_dev); 899 return ret; 900 } 901 902 static void gspca_set_default_mode(struct gspca_dev *gspca_dev) 903 { 904 int i; 905 906 i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ 907 gspca_dev->curr_mode = i; 908 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i]; 909 910 /* does nothing if ctrl_handler == NULL */ 911 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler); 912 } 913 914 static int wxh_to_mode(struct gspca_dev *gspca_dev, 915 int width, int height) 916 { 917 int i; 918 919 for (i = 0; i < gspca_dev->cam.nmodes; i++) { 920 if (width == gspca_dev->cam.cam_mode[i].width 921 && height == gspca_dev->cam.cam_mode[i].height) 922 return i; 923 } 924 return -EINVAL; 925 } 926 927 static int wxh_to_nearest_mode(struct gspca_dev *gspca_dev, 928 int width, int height) 929 { 930 int i; 931 932 for (i = gspca_dev->cam.nmodes; --i > 0; ) { 933 if (width >= gspca_dev->cam.cam_mode[i].width 934 && height >= gspca_dev->cam.cam_mode[i].height) 935 break; 936 } 937 return i; 938 } 939 940 /* 941 * search a mode with the right pixel format 942 */ 943 static int gspca_get_mode(struct gspca_dev *gspca_dev, 944 int mode, 945 int pixfmt) 946 { 947 int modeU, modeD; 948 949 modeU = modeD = mode; 950 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { 951 if (--modeD >= 0) { 952 if (gspca_dev->cam.cam_mode[modeD].pixelformat 953 == pixfmt) 954 return modeD; 955 } 956 if (++modeU < gspca_dev->cam.nmodes) { 957 if (gspca_dev->cam.cam_mode[modeU].pixelformat 958 == pixfmt) 959 return modeU; 960 } 961 } 962 return -EINVAL; 963 } 964 965 #ifdef CONFIG_VIDEO_ADV_DEBUG 966 static int vidioc_g_chip_info(struct file *file, void *priv, 967 struct v4l2_dbg_chip_info *chip) 968 { 969 struct gspca_dev *gspca_dev = video_drvdata(file); 970 971 gspca_dev->usb_err = 0; 972 if (gspca_dev->sd_desc->get_chip_info) 973 return gspca_dev->sd_desc->get_chip_info(gspca_dev, chip); 974 return chip->match.addr ? -EINVAL : 0; 975 } 976 977 static int vidioc_g_register(struct file *file, void *priv, 978 struct v4l2_dbg_register *reg) 979 { 980 struct gspca_dev *gspca_dev = video_drvdata(file); 981 982 gspca_dev->usb_err = 0; 983 return gspca_dev->sd_desc->get_register(gspca_dev, reg); 984 } 985 986 static int vidioc_s_register(struct file *file, void *priv, 987 const struct v4l2_dbg_register *reg) 988 { 989 struct gspca_dev *gspca_dev = video_drvdata(file); 990 991 gspca_dev->usb_err = 0; 992 return gspca_dev->sd_desc->set_register(gspca_dev, reg); 993 } 994 #endif 995 996 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 997 struct v4l2_fmtdesc *fmtdesc) 998 { 999 struct gspca_dev *gspca_dev = video_drvdata(file); 1000 int i, j, index; 1001 __u32 fmt_tb[8]; 1002 1003 /* give an index to each format */ 1004 index = 0; 1005 for (i = gspca_dev->cam.nmodes; --i >= 0; ) { 1006 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; 1007 j = 0; 1008 for (;;) { 1009 if (fmt_tb[j] == fmt_tb[index]) 1010 break; 1011 j++; 1012 } 1013 if (j == index) { 1014 if (fmtdesc->index == index) 1015 break; /* new format */ 1016 index++; 1017 if (index >= ARRAY_SIZE(fmt_tb)) 1018 return -EINVAL; 1019 } 1020 } 1021 if (i < 0) 1022 return -EINVAL; /* no more format */ 1023 1024 fmtdesc->pixelformat = fmt_tb[index]; 1025 if (gspca_dev->cam.cam_mode[i].sizeimage < 1026 gspca_dev->cam.cam_mode[i].width * 1027 gspca_dev->cam.cam_mode[i].height) 1028 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; 1029 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; 1030 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; 1031 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; 1032 fmtdesc->description[3] = fmtdesc->pixelformat >> 24; 1033 fmtdesc->description[4] = '\0'; 1034 return 0; 1035 } 1036 1037 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 1038 struct v4l2_format *fmt) 1039 { 1040 struct gspca_dev *gspca_dev = video_drvdata(file); 1041 1042 fmt->fmt.pix = gspca_dev->pixfmt; 1043 /* some drivers use priv internally, zero it before giving it back to 1044 the core */ 1045 fmt->fmt.pix.priv = 0; 1046 return 0; 1047 } 1048 1049 static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, 1050 struct v4l2_format *fmt) 1051 { 1052 int w, h, mode, mode2; 1053 1054 w = fmt->fmt.pix.width; 1055 h = fmt->fmt.pix.height; 1056 1057 PDEBUG_MODE(gspca_dev, D_CONF, "try fmt cap", 1058 fmt->fmt.pix.pixelformat, w, h); 1059 1060 /* search the nearest mode for width and height */ 1061 mode = wxh_to_nearest_mode(gspca_dev, w, h); 1062 1063 /* OK if right palette */ 1064 if (gspca_dev->cam.cam_mode[mode].pixelformat 1065 != fmt->fmt.pix.pixelformat) { 1066 1067 /* else, search the closest mode with the same pixel format */ 1068 mode2 = gspca_get_mode(gspca_dev, mode, 1069 fmt->fmt.pix.pixelformat); 1070 if (mode2 >= 0) 1071 mode = mode2; 1072 } 1073 fmt->fmt.pix = gspca_dev->cam.cam_mode[mode]; 1074 if (gspca_dev->sd_desc->try_fmt) { 1075 /* pass original resolution to subdriver try_fmt */ 1076 fmt->fmt.pix.width = w; 1077 fmt->fmt.pix.height = h; 1078 gspca_dev->sd_desc->try_fmt(gspca_dev, fmt); 1079 } 1080 /* some drivers use priv internally, zero it before giving it back to 1081 the core */ 1082 fmt->fmt.pix.priv = 0; 1083 return mode; /* used when s_fmt */ 1084 } 1085 1086 static int vidioc_try_fmt_vid_cap(struct file *file, 1087 void *priv, 1088 struct v4l2_format *fmt) 1089 { 1090 struct gspca_dev *gspca_dev = video_drvdata(file); 1091 1092 if (try_fmt_vid_cap(gspca_dev, fmt) < 0) 1093 return -EINVAL; 1094 return 0; 1095 } 1096 1097 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 1098 struct v4l2_format *fmt) 1099 { 1100 struct gspca_dev *gspca_dev = video_drvdata(file); 1101 int mode; 1102 1103 if (vb2_is_busy(&gspca_dev->queue)) 1104 return -EBUSY; 1105 1106 mode = try_fmt_vid_cap(gspca_dev, fmt); 1107 if (mode < 0) 1108 return -EINVAL; 1109 1110 gspca_dev->curr_mode = mode; 1111 if (gspca_dev->sd_desc->try_fmt) 1112 /* subdriver try_fmt can modify format parameters */ 1113 gspca_dev->pixfmt = fmt->fmt.pix; 1114 else 1115 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[mode]; 1116 return 0; 1117 } 1118 1119 static int vidioc_enum_framesizes(struct file *file, void *priv, 1120 struct v4l2_frmsizeenum *fsize) 1121 { 1122 struct gspca_dev *gspca_dev = video_drvdata(file); 1123 int i; 1124 __u32 index = 0; 1125 1126 if (gspca_dev->sd_desc->enum_framesizes) 1127 return gspca_dev->sd_desc->enum_framesizes(gspca_dev, fsize); 1128 1129 for (i = 0; i < gspca_dev->cam.nmodes; i++) { 1130 if (fsize->pixel_format != 1131 gspca_dev->cam.cam_mode[i].pixelformat) 1132 continue; 1133 1134 if (fsize->index == index) { 1135 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 1136 fsize->discrete.width = 1137 gspca_dev->cam.cam_mode[i].width; 1138 fsize->discrete.height = 1139 gspca_dev->cam.cam_mode[i].height; 1140 return 0; 1141 } 1142 index++; 1143 } 1144 1145 return -EINVAL; 1146 } 1147 1148 static int vidioc_enum_frameintervals(struct file *filp, void *priv, 1149 struct v4l2_frmivalenum *fival) 1150 { 1151 struct gspca_dev *gspca_dev = video_drvdata(filp); 1152 int mode; 1153 __u32 i; 1154 1155 mode = wxh_to_mode(gspca_dev, fival->width, fival->height); 1156 if (mode < 0) 1157 return -EINVAL; 1158 1159 if (gspca_dev->cam.mode_framerates == NULL || 1160 gspca_dev->cam.mode_framerates[mode].nrates == 0) 1161 return -EINVAL; 1162 1163 if (fival->pixel_format != 1164 gspca_dev->cam.cam_mode[mode].pixelformat) 1165 return -EINVAL; 1166 1167 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) { 1168 if (fival->index == i) { 1169 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; 1170 fival->discrete.numerator = 1; 1171 fival->discrete.denominator = 1172 gspca_dev->cam.mode_framerates[mode].rates[i]; 1173 return 0; 1174 } 1175 } 1176 1177 return -EINVAL; 1178 } 1179 1180 static void gspca_release(struct v4l2_device *v4l2_device) 1181 { 1182 struct gspca_dev *gspca_dev = 1183 container_of(v4l2_device, struct gspca_dev, v4l2_dev); 1184 1185 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler); 1186 v4l2_device_unregister(&gspca_dev->v4l2_dev); 1187 kfree(gspca_dev->usb_buf); 1188 kfree(gspca_dev); 1189 } 1190 1191 static int vidioc_querycap(struct file *file, void *priv, 1192 struct v4l2_capability *cap) 1193 { 1194 struct gspca_dev *gspca_dev = video_drvdata(file); 1195 1196 strscpy((char *)cap->driver, gspca_dev->sd_desc->name, 1197 sizeof(cap->driver)); 1198 if (gspca_dev->dev->product != NULL) { 1199 strscpy((char *)cap->card, gspca_dev->dev->product, 1200 sizeof(cap->card)); 1201 } else { 1202 snprintf((char *) cap->card, sizeof cap->card, 1203 "USB Camera (%04x:%04x)", 1204 le16_to_cpu(gspca_dev->dev->descriptor.idVendor), 1205 le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); 1206 } 1207 usb_make_path(gspca_dev->dev, (char *) cap->bus_info, 1208 sizeof(cap->bus_info)); 1209 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE 1210 | V4L2_CAP_STREAMING 1211 | V4L2_CAP_READWRITE; 1212 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 1213 return 0; 1214 } 1215 1216 static int vidioc_enum_input(struct file *file, void *priv, 1217 struct v4l2_input *input) 1218 { 1219 struct gspca_dev *gspca_dev = video_drvdata(file); 1220 1221 if (input->index != 0) 1222 return -EINVAL; 1223 input->type = V4L2_INPUT_TYPE_CAMERA; 1224 input->status = gspca_dev->cam.input_flags; 1225 strscpy(input->name, gspca_dev->sd_desc->name, 1226 sizeof input->name); 1227 return 0; 1228 } 1229 1230 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 1231 { 1232 *i = 0; 1233 return 0; 1234 } 1235 1236 static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 1237 { 1238 if (i > 0) 1239 return -EINVAL; 1240 return 0; 1241 } 1242 1243 static int vidioc_g_jpegcomp(struct file *file, void *priv, 1244 struct v4l2_jpegcompression *jpegcomp) 1245 { 1246 struct gspca_dev *gspca_dev = video_drvdata(file); 1247 1248 gspca_dev->usb_err = 0; 1249 return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); 1250 } 1251 1252 static int vidioc_s_jpegcomp(struct file *file, void *priv, 1253 const struct v4l2_jpegcompression *jpegcomp) 1254 { 1255 struct gspca_dev *gspca_dev = video_drvdata(file); 1256 1257 gspca_dev->usb_err = 0; 1258 return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); 1259 } 1260 1261 static int vidioc_g_parm(struct file *filp, void *priv, 1262 struct v4l2_streamparm *parm) 1263 { 1264 struct gspca_dev *gspca_dev = video_drvdata(filp); 1265 1266 parm->parm.capture.readbuffers = gspca_dev->queue.min_buffers_needed; 1267 1268 if (!gspca_dev->sd_desc->get_streamparm) 1269 return 0; 1270 1271 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; 1272 gspca_dev->usb_err = 0; 1273 gspca_dev->sd_desc->get_streamparm(gspca_dev, parm); 1274 return gspca_dev->usb_err; 1275 } 1276 1277 static int vidioc_s_parm(struct file *filp, void *priv, 1278 struct v4l2_streamparm *parm) 1279 { 1280 struct gspca_dev *gspca_dev = video_drvdata(filp); 1281 1282 parm->parm.capture.readbuffers = gspca_dev->queue.min_buffers_needed; 1283 1284 if (!gspca_dev->sd_desc->set_streamparm) { 1285 parm->parm.capture.capability = 0; 1286 return 0; 1287 } 1288 1289 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; 1290 gspca_dev->usb_err = 0; 1291 gspca_dev->sd_desc->set_streamparm(gspca_dev, parm); 1292 return gspca_dev->usb_err; 1293 } 1294 1295 static int gspca_queue_setup(struct vb2_queue *vq, 1296 unsigned int *nbuffers, unsigned int *nplanes, 1297 unsigned int sizes[], struct device *alloc_devs[]) 1298 { 1299 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq); 1300 unsigned int size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage); 1301 1302 if (*nplanes) 1303 return sizes[0] < size ? -EINVAL : 0; 1304 *nplanes = 1; 1305 sizes[0] = size; 1306 return 0; 1307 } 1308 1309 static int gspca_buffer_prepare(struct vb2_buffer *vb) 1310 { 1311 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue); 1312 unsigned long size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage); 1313 1314 if (vb2_plane_size(vb, 0) < size) { 1315 gspca_err(gspca_dev, "buffer too small (%lu < %lu)\n", 1316 vb2_plane_size(vb, 0), size); 1317 return -EINVAL; 1318 } 1319 return 0; 1320 } 1321 1322 static void gspca_buffer_finish(struct vb2_buffer *vb) 1323 { 1324 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue); 1325 1326 if (!gspca_dev->sd_desc->dq_callback) 1327 return; 1328 1329 gspca_dev->usb_err = 0; 1330 if (gspca_dev->present) 1331 gspca_dev->sd_desc->dq_callback(gspca_dev); 1332 } 1333 1334 static void gspca_buffer_queue(struct vb2_buffer *vb) 1335 { 1336 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue); 1337 struct gspca_buffer *buf = to_gspca_buffer(vb); 1338 unsigned long flags; 1339 1340 spin_lock_irqsave(&gspca_dev->qlock, flags); 1341 list_add_tail(&buf->list, &gspca_dev->buf_list); 1342 spin_unlock_irqrestore(&gspca_dev->qlock, flags); 1343 } 1344 1345 static void gspca_return_all_buffers(struct gspca_dev *gspca_dev, 1346 enum vb2_buffer_state state) 1347 { 1348 struct gspca_buffer *buf, *node; 1349 unsigned long flags; 1350 1351 spin_lock_irqsave(&gspca_dev->qlock, flags); 1352 list_for_each_entry_safe(buf, node, &gspca_dev->buf_list, list) { 1353 vb2_buffer_done(&buf->vb.vb2_buf, state); 1354 list_del(&buf->list); 1355 } 1356 spin_unlock_irqrestore(&gspca_dev->qlock, flags); 1357 } 1358 1359 static int gspca_start_streaming(struct vb2_queue *vq, unsigned int count) 1360 { 1361 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq); 1362 int ret; 1363 1364 gspca_dev->sequence = 0; 1365 1366 ret = gspca_init_transfer(gspca_dev); 1367 if (ret) 1368 gspca_return_all_buffers(gspca_dev, VB2_BUF_STATE_QUEUED); 1369 return ret; 1370 } 1371 1372 static void gspca_stop_streaming(struct vb2_queue *vq) 1373 { 1374 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq); 1375 1376 gspca_stream_off(gspca_dev); 1377 1378 /* Release all active buffers */ 1379 gspca_return_all_buffers(gspca_dev, VB2_BUF_STATE_ERROR); 1380 } 1381 1382 static const struct vb2_ops gspca_qops = { 1383 .queue_setup = gspca_queue_setup, 1384 .buf_prepare = gspca_buffer_prepare, 1385 .buf_finish = gspca_buffer_finish, 1386 .buf_queue = gspca_buffer_queue, 1387 .start_streaming = gspca_start_streaming, 1388 .stop_streaming = gspca_stop_streaming, 1389 .wait_prepare = vb2_ops_wait_prepare, 1390 .wait_finish = vb2_ops_wait_finish, 1391 }; 1392 1393 static const struct v4l2_file_operations dev_fops = { 1394 .owner = THIS_MODULE, 1395 .open = v4l2_fh_open, 1396 .release = vb2_fop_release, 1397 .unlocked_ioctl = video_ioctl2, 1398 .read = vb2_fop_read, 1399 .mmap = vb2_fop_mmap, 1400 .poll = vb2_fop_poll, 1401 }; 1402 1403 static const struct v4l2_ioctl_ops dev_ioctl_ops = { 1404 .vidioc_querycap = vidioc_querycap, 1405 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 1406 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 1407 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 1408 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 1409 .vidioc_enum_input = vidioc_enum_input, 1410 .vidioc_g_input = vidioc_g_input, 1411 .vidioc_s_input = vidioc_s_input, 1412 .vidioc_g_jpegcomp = vidioc_g_jpegcomp, 1413 .vidioc_s_jpegcomp = vidioc_s_jpegcomp, 1414 .vidioc_g_parm = vidioc_g_parm, 1415 .vidioc_s_parm = vidioc_s_parm, 1416 .vidioc_enum_framesizes = vidioc_enum_framesizes, 1417 .vidioc_enum_frameintervals = vidioc_enum_frameintervals, 1418 1419 .vidioc_reqbufs = vb2_ioctl_reqbufs, 1420 .vidioc_create_bufs = vb2_ioctl_create_bufs, 1421 .vidioc_querybuf = vb2_ioctl_querybuf, 1422 .vidioc_qbuf = vb2_ioctl_qbuf, 1423 .vidioc_dqbuf = vb2_ioctl_dqbuf, 1424 .vidioc_expbuf = vb2_ioctl_expbuf, 1425 .vidioc_streamon = vb2_ioctl_streamon, 1426 .vidioc_streamoff = vb2_ioctl_streamoff, 1427 1428 #ifdef CONFIG_VIDEO_ADV_DEBUG 1429 .vidioc_g_chip_info = vidioc_g_chip_info, 1430 .vidioc_g_register = vidioc_g_register, 1431 .vidioc_s_register = vidioc_s_register, 1432 #endif 1433 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 1434 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1435 }; 1436 1437 static const struct video_device gspca_template = { 1438 .name = "gspca main driver", 1439 .fops = &dev_fops, 1440 .ioctl_ops = &dev_ioctl_ops, 1441 .release = video_device_release_empty, /* We use v4l2_dev.release */ 1442 }; 1443 1444 /* 1445 * probe and create a new gspca device 1446 * 1447 * This function must be called by the sub-driver when it is 1448 * called for probing a new device. 1449 */ 1450 int gspca_dev_probe2(struct usb_interface *intf, 1451 const struct usb_device_id *id, 1452 const struct sd_desc *sd_desc, 1453 int dev_size, 1454 struct module *module) 1455 { 1456 struct gspca_dev *gspca_dev; 1457 struct usb_device *dev = interface_to_usbdev(intf); 1458 struct vb2_queue *q; 1459 int ret; 1460 1461 pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n", 1462 sd_desc->name, id->idVendor, id->idProduct); 1463 1464 /* create the device */ 1465 if (dev_size < sizeof *gspca_dev) 1466 dev_size = sizeof *gspca_dev; 1467 gspca_dev = kzalloc(dev_size, GFP_KERNEL); 1468 if (!gspca_dev) { 1469 pr_err("couldn't kzalloc gspca struct\n"); 1470 return -ENOMEM; 1471 } 1472 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL); 1473 if (!gspca_dev->usb_buf) { 1474 pr_err("out of memory\n"); 1475 ret = -ENOMEM; 1476 goto out; 1477 } 1478 gspca_dev->dev = dev; 1479 gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber; 1480 gspca_dev->xfer_ep = -1; 1481 1482 /* check if any audio device */ 1483 if (dev->actconfig->desc.bNumInterfaces != 1) { 1484 int i; 1485 struct usb_interface *intf2; 1486 1487 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { 1488 intf2 = dev->actconfig->interface[i]; 1489 if (intf2 != NULL 1490 && intf2->altsetting != NULL 1491 && intf2->altsetting->desc.bInterfaceClass == 1492 USB_CLASS_AUDIO) { 1493 gspca_dev->audio = 1; 1494 break; 1495 } 1496 } 1497 } 1498 1499 gspca_dev->v4l2_dev.release = gspca_release; 1500 ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev); 1501 if (ret) 1502 goto out; 1503 gspca_dev->present = true; 1504 gspca_dev->sd_desc = sd_desc; 1505 gspca_dev->empty_packet = -1; /* don't check the empty packets */ 1506 gspca_dev->vdev = gspca_template; 1507 gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev; 1508 video_set_drvdata(&gspca_dev->vdev, gspca_dev); 1509 gspca_dev->module = module; 1510 1511 mutex_init(&gspca_dev->usb_lock); 1512 gspca_dev->vdev.lock = &gspca_dev->usb_lock; 1513 init_waitqueue_head(&gspca_dev->wq); 1514 1515 /* Initialize the vb2 queue */ 1516 q = &gspca_dev->queue; 1517 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1518 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ; 1519 q->drv_priv = gspca_dev; 1520 q->buf_struct_size = sizeof(struct gspca_buffer); 1521 q->ops = &gspca_qops; 1522 q->mem_ops = &vb2_vmalloc_memops; 1523 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1524 q->min_buffers_needed = 2; 1525 q->lock = &gspca_dev->usb_lock; 1526 ret = vb2_queue_init(q); 1527 if (ret) 1528 goto out; 1529 gspca_dev->vdev.queue = q; 1530 1531 INIT_LIST_HEAD(&gspca_dev->buf_list); 1532 spin_lock_init(&gspca_dev->qlock); 1533 1534 /* configure the subdriver and initialize the USB device */ 1535 ret = sd_desc->config(gspca_dev, id); 1536 if (ret < 0) 1537 goto out; 1538 ret = sd_desc->init(gspca_dev); 1539 if (ret < 0) 1540 goto out; 1541 if (sd_desc->init_controls) 1542 ret = sd_desc->init_controls(gspca_dev); 1543 if (ret < 0) 1544 goto out; 1545 gspca_set_default_mode(gspca_dev); 1546 1547 ret = gspca_input_connect(gspca_dev); 1548 if (ret) 1549 goto out; 1550 1551 #ifdef CONFIG_VIDEO_ADV_DEBUG 1552 if (!gspca_dev->sd_desc->get_register) 1553 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_REGISTER); 1554 if (!gspca_dev->sd_desc->set_register) 1555 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_S_REGISTER); 1556 #endif 1557 if (!gspca_dev->sd_desc->get_jcomp) 1558 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_G_JPEGCOMP); 1559 if (!gspca_dev->sd_desc->set_jcomp) 1560 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_S_JPEGCOMP); 1561 1562 /* init video stuff */ 1563 ret = video_register_device(&gspca_dev->vdev, 1564 VFL_TYPE_GRABBER, 1565 -1); 1566 if (ret < 0) { 1567 pr_err("video_register_device err %d\n", ret); 1568 goto out; 1569 } 1570 1571 usb_set_intfdata(intf, gspca_dev); 1572 gspca_dbg(gspca_dev, D_PROBE, "%s created\n", 1573 video_device_node_name(&gspca_dev->vdev)); 1574 1575 gspca_input_create_urb(gspca_dev); 1576 1577 return 0; 1578 out: 1579 #if IS_ENABLED(CONFIG_INPUT) 1580 if (gspca_dev->input_dev) 1581 input_unregister_device(gspca_dev->input_dev); 1582 #endif 1583 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler); 1584 kfree(gspca_dev->usb_buf); 1585 kfree(gspca_dev); 1586 return ret; 1587 } 1588 EXPORT_SYMBOL(gspca_dev_probe2); 1589 1590 /* same function as the previous one, but check the interface */ 1591 int gspca_dev_probe(struct usb_interface *intf, 1592 const struct usb_device_id *id, 1593 const struct sd_desc *sd_desc, 1594 int dev_size, 1595 struct module *module) 1596 { 1597 struct usb_device *dev = interface_to_usbdev(intf); 1598 1599 /* we don't handle multi-config cameras */ 1600 if (dev->descriptor.bNumConfigurations != 1) { 1601 pr_err("%04x:%04x too many config\n", 1602 id->idVendor, id->idProduct); 1603 return -ENODEV; 1604 } 1605 1606 /* the USB video interface must be the first one */ 1607 if (dev->actconfig->desc.bNumInterfaces != 1 1608 && intf->cur_altsetting->desc.bInterfaceNumber != 0) 1609 return -ENODEV; 1610 1611 return gspca_dev_probe2(intf, id, sd_desc, dev_size, module); 1612 } 1613 EXPORT_SYMBOL(gspca_dev_probe); 1614 1615 /* 1616 * USB disconnection 1617 * 1618 * This function must be called by the sub-driver 1619 * when the device disconnects, after the specific resources are freed. 1620 */ 1621 void gspca_disconnect(struct usb_interface *intf) 1622 { 1623 struct gspca_dev *gspca_dev = usb_get_intfdata(intf); 1624 #if IS_ENABLED(CONFIG_INPUT) 1625 struct input_dev *input_dev; 1626 #endif 1627 1628 gspca_dbg(gspca_dev, D_PROBE, "%s disconnect\n", 1629 video_device_node_name(&gspca_dev->vdev)); 1630 1631 mutex_lock(&gspca_dev->usb_lock); 1632 gspca_dev->present = false; 1633 1634 vb2_queue_error(&gspca_dev->queue); 1635 1636 #if IS_ENABLED(CONFIG_INPUT) 1637 input_dev = gspca_dev->input_dev; 1638 if (input_dev) { 1639 gspca_dev->input_dev = NULL; 1640 input_unregister_device(input_dev); 1641 } 1642 #endif 1643 1644 v4l2_device_disconnect(&gspca_dev->v4l2_dev); 1645 video_unregister_device(&gspca_dev->vdev); 1646 1647 mutex_unlock(&gspca_dev->usb_lock); 1648 1649 /* (this will call gspca_release() immediately or on last close) */ 1650 v4l2_device_put(&gspca_dev->v4l2_dev); 1651 } 1652 EXPORT_SYMBOL(gspca_disconnect); 1653 1654 #ifdef CONFIG_PM 1655 int gspca_suspend(struct usb_interface *intf, pm_message_t message) 1656 { 1657 struct gspca_dev *gspca_dev = usb_get_intfdata(intf); 1658 1659 gspca_input_destroy_urb(gspca_dev); 1660 1661 if (!vb2_start_streaming_called(&gspca_dev->queue)) 1662 return 0; 1663 1664 mutex_lock(&gspca_dev->usb_lock); 1665 gspca_dev->frozen = 1; /* avoid urb error messages */ 1666 gspca_dev->usb_err = 0; 1667 if (gspca_dev->sd_desc->stopN) 1668 gspca_dev->sd_desc->stopN(gspca_dev); 1669 destroy_urbs(gspca_dev); 1670 gspca_set_alt0(gspca_dev); 1671 if (gspca_dev->sd_desc->stop0) 1672 gspca_dev->sd_desc->stop0(gspca_dev); 1673 mutex_unlock(&gspca_dev->usb_lock); 1674 1675 return 0; 1676 } 1677 EXPORT_SYMBOL(gspca_suspend); 1678 1679 int gspca_resume(struct usb_interface *intf) 1680 { 1681 struct gspca_dev *gspca_dev = usb_get_intfdata(intf); 1682 int streaming, ret = 0; 1683 1684 mutex_lock(&gspca_dev->usb_lock); 1685 gspca_dev->frozen = 0; 1686 gspca_dev->usb_err = 0; 1687 gspca_dev->sd_desc->init(gspca_dev); 1688 /* 1689 * Most subdrivers send all ctrl values on sd_start and thus 1690 * only write to the device registers on s_ctrl when streaming -> 1691 * Clear streaming to avoid setting all ctrls twice. 1692 */ 1693 streaming = vb2_start_streaming_called(&gspca_dev->queue); 1694 if (streaming) 1695 ret = gspca_init_transfer(gspca_dev); 1696 else 1697 gspca_input_create_urb(gspca_dev); 1698 mutex_unlock(&gspca_dev->usb_lock); 1699 1700 return ret; 1701 } 1702 EXPORT_SYMBOL(gspca_resume); 1703 #endif 1704 1705 /* -- module insert / remove -- */ 1706 static int __init gspca_init(void) 1707 { 1708 pr_info("v" GSPCA_VERSION " registered\n"); 1709 return 0; 1710 } 1711 static void __exit gspca_exit(void) 1712 { 1713 } 1714 1715 module_init(gspca_init); 1716 module_exit(gspca_exit); 1717 1718 module_param_named(debug, gspca_debug, int, 0644); 1719 MODULE_PARM_DESC(debug, 1720 "1:probe 2:config 3:stream 4:frame 5:packet 6:usbi 7:usbo"); 1721