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, u32 pixelformat) 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 && pixelformat == gspca_dev->cam.cam_mode[i].pixelformat) 923 return i; 924 } 925 return -EINVAL; 926 } 927 928 static int wxh_to_nearest_mode(struct gspca_dev *gspca_dev, 929 int width, int height, u32 pixelformat) 930 { 931 int i; 932 933 for (i = gspca_dev->cam.nmodes; --i > 0; ) { 934 if (width >= gspca_dev->cam.cam_mode[i].width 935 && height >= gspca_dev->cam.cam_mode[i].height 936 && pixelformat == gspca_dev->cam.cam_mode[i].pixelformat) 937 return i; 938 } 939 for (i = gspca_dev->cam.nmodes; --i > 0; ) { 940 if (width >= gspca_dev->cam.cam_mode[i].width 941 && height >= gspca_dev->cam.cam_mode[i].height) 942 break; 943 } 944 return i; 945 } 946 947 /* 948 * search a mode with the right pixel format 949 */ 950 static int gspca_get_mode(struct gspca_dev *gspca_dev, 951 int mode, 952 int pixfmt) 953 { 954 int modeU, modeD; 955 956 modeU = modeD = mode; 957 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { 958 if (--modeD >= 0) { 959 if (gspca_dev->cam.cam_mode[modeD].pixelformat 960 == pixfmt) 961 return modeD; 962 } 963 if (++modeU < gspca_dev->cam.nmodes) { 964 if (gspca_dev->cam.cam_mode[modeU].pixelformat 965 == pixfmt) 966 return modeU; 967 } 968 } 969 return -EINVAL; 970 } 971 972 #ifdef CONFIG_VIDEO_ADV_DEBUG 973 static int vidioc_g_chip_info(struct file *file, void *priv, 974 struct v4l2_dbg_chip_info *chip) 975 { 976 struct gspca_dev *gspca_dev = video_drvdata(file); 977 978 gspca_dev->usb_err = 0; 979 if (gspca_dev->sd_desc->get_chip_info) 980 return gspca_dev->sd_desc->get_chip_info(gspca_dev, chip); 981 return chip->match.addr ? -EINVAL : 0; 982 } 983 984 static int vidioc_g_register(struct file *file, void *priv, 985 struct v4l2_dbg_register *reg) 986 { 987 struct gspca_dev *gspca_dev = video_drvdata(file); 988 989 gspca_dev->usb_err = 0; 990 return gspca_dev->sd_desc->get_register(gspca_dev, reg); 991 } 992 993 static int vidioc_s_register(struct file *file, void *priv, 994 const struct v4l2_dbg_register *reg) 995 { 996 struct gspca_dev *gspca_dev = video_drvdata(file); 997 998 gspca_dev->usb_err = 0; 999 return gspca_dev->sd_desc->set_register(gspca_dev, reg); 1000 } 1001 #endif 1002 1003 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 1004 struct v4l2_fmtdesc *fmtdesc) 1005 { 1006 struct gspca_dev *gspca_dev = video_drvdata(file); 1007 int i, j, index; 1008 __u32 fmt_tb[8]; 1009 1010 /* give an index to each format */ 1011 index = 0; 1012 for (i = gspca_dev->cam.nmodes; --i >= 0; ) { 1013 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; 1014 j = 0; 1015 for (;;) { 1016 if (fmt_tb[j] == fmt_tb[index]) 1017 break; 1018 j++; 1019 } 1020 if (j == index) { 1021 if (fmtdesc->index == index) 1022 break; /* new format */ 1023 index++; 1024 if (index >= ARRAY_SIZE(fmt_tb)) 1025 return -EINVAL; 1026 } 1027 } 1028 if (i < 0) 1029 return -EINVAL; /* no more format */ 1030 1031 fmtdesc->pixelformat = fmt_tb[index]; 1032 if (gspca_dev->cam.cam_mode[i].sizeimage < 1033 gspca_dev->cam.cam_mode[i].width * 1034 gspca_dev->cam.cam_mode[i].height) 1035 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; 1036 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; 1037 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; 1038 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; 1039 fmtdesc->description[3] = fmtdesc->pixelformat >> 24; 1040 fmtdesc->description[4] = '\0'; 1041 return 0; 1042 } 1043 1044 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 1045 struct v4l2_format *fmt) 1046 { 1047 struct gspca_dev *gspca_dev = video_drvdata(file); 1048 1049 fmt->fmt.pix = gspca_dev->pixfmt; 1050 /* some drivers use priv internally, zero it before giving it back to 1051 the core */ 1052 fmt->fmt.pix.priv = 0; 1053 return 0; 1054 } 1055 1056 static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, 1057 struct v4l2_format *fmt) 1058 { 1059 int w, h, mode, mode2; 1060 1061 w = fmt->fmt.pix.width; 1062 h = fmt->fmt.pix.height; 1063 1064 PDEBUG_MODE(gspca_dev, D_CONF, "try fmt cap", 1065 fmt->fmt.pix.pixelformat, w, h); 1066 1067 /* search the nearest mode for width and height */ 1068 mode = wxh_to_nearest_mode(gspca_dev, w, h, fmt->fmt.pix.pixelformat); 1069 1070 /* OK if right palette */ 1071 if (gspca_dev->cam.cam_mode[mode].pixelformat 1072 != fmt->fmt.pix.pixelformat) { 1073 1074 /* else, search the closest mode with the same pixel format */ 1075 mode2 = gspca_get_mode(gspca_dev, mode, 1076 fmt->fmt.pix.pixelformat); 1077 if (mode2 >= 0) 1078 mode = mode2; 1079 } 1080 fmt->fmt.pix = gspca_dev->cam.cam_mode[mode]; 1081 if (gspca_dev->sd_desc->try_fmt) { 1082 /* pass original resolution to subdriver try_fmt */ 1083 fmt->fmt.pix.width = w; 1084 fmt->fmt.pix.height = h; 1085 gspca_dev->sd_desc->try_fmt(gspca_dev, fmt); 1086 } 1087 /* some drivers use priv internally, zero it before giving it back to 1088 the core */ 1089 fmt->fmt.pix.priv = 0; 1090 return mode; /* used when s_fmt */ 1091 } 1092 1093 static int vidioc_try_fmt_vid_cap(struct file *file, 1094 void *priv, 1095 struct v4l2_format *fmt) 1096 { 1097 struct gspca_dev *gspca_dev = video_drvdata(file); 1098 1099 if (try_fmt_vid_cap(gspca_dev, fmt) < 0) 1100 return -EINVAL; 1101 return 0; 1102 } 1103 1104 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 1105 struct v4l2_format *fmt) 1106 { 1107 struct gspca_dev *gspca_dev = video_drvdata(file); 1108 int mode; 1109 1110 if (vb2_is_busy(&gspca_dev->queue)) 1111 return -EBUSY; 1112 1113 mode = try_fmt_vid_cap(gspca_dev, fmt); 1114 if (mode < 0) 1115 return -EINVAL; 1116 1117 gspca_dev->curr_mode = mode; 1118 if (gspca_dev->sd_desc->try_fmt) 1119 /* subdriver try_fmt can modify format parameters */ 1120 gspca_dev->pixfmt = fmt->fmt.pix; 1121 else 1122 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[mode]; 1123 return 0; 1124 } 1125 1126 static int vidioc_enum_framesizes(struct file *file, void *priv, 1127 struct v4l2_frmsizeenum *fsize) 1128 { 1129 struct gspca_dev *gspca_dev = video_drvdata(file); 1130 int i; 1131 __u32 index = 0; 1132 1133 if (gspca_dev->sd_desc->enum_framesizes) 1134 return gspca_dev->sd_desc->enum_framesizes(gspca_dev, fsize); 1135 1136 for (i = 0; i < gspca_dev->cam.nmodes; i++) { 1137 if (fsize->pixel_format != 1138 gspca_dev->cam.cam_mode[i].pixelformat) 1139 continue; 1140 1141 if (fsize->index == index) { 1142 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 1143 fsize->discrete.width = 1144 gspca_dev->cam.cam_mode[i].width; 1145 fsize->discrete.height = 1146 gspca_dev->cam.cam_mode[i].height; 1147 return 0; 1148 } 1149 index++; 1150 } 1151 1152 return -EINVAL; 1153 } 1154 1155 static int vidioc_enum_frameintervals(struct file *filp, void *priv, 1156 struct v4l2_frmivalenum *fival) 1157 { 1158 struct gspca_dev *gspca_dev = video_drvdata(filp); 1159 int mode; 1160 __u32 i; 1161 1162 mode = wxh_to_mode(gspca_dev, fival->width, fival->height, 1163 fival->pixel_format); 1164 if (mode < 0) 1165 return -EINVAL; 1166 1167 if (gspca_dev->cam.mode_framerates == NULL || 1168 gspca_dev->cam.mode_framerates[mode].nrates == 0) 1169 return -EINVAL; 1170 1171 if (fival->pixel_format != 1172 gspca_dev->cam.cam_mode[mode].pixelformat) 1173 return -EINVAL; 1174 1175 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) { 1176 if (fival->index == i) { 1177 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; 1178 fival->discrete.numerator = 1; 1179 fival->discrete.denominator = 1180 gspca_dev->cam.mode_framerates[mode].rates[i]; 1181 return 0; 1182 } 1183 } 1184 1185 return -EINVAL; 1186 } 1187 1188 static void gspca_release(struct v4l2_device *v4l2_device) 1189 { 1190 struct gspca_dev *gspca_dev = 1191 container_of(v4l2_device, struct gspca_dev, v4l2_dev); 1192 1193 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler); 1194 v4l2_device_unregister(&gspca_dev->v4l2_dev); 1195 kfree(gspca_dev->usb_buf); 1196 kfree(gspca_dev); 1197 } 1198 1199 static int vidioc_querycap(struct file *file, void *priv, 1200 struct v4l2_capability *cap) 1201 { 1202 struct gspca_dev *gspca_dev = video_drvdata(file); 1203 1204 strscpy((char *)cap->driver, gspca_dev->sd_desc->name, 1205 sizeof(cap->driver)); 1206 if (gspca_dev->dev->product != NULL) { 1207 strscpy((char *)cap->card, gspca_dev->dev->product, 1208 sizeof(cap->card)); 1209 } else { 1210 snprintf((char *) cap->card, sizeof cap->card, 1211 "USB Camera (%04x:%04x)", 1212 le16_to_cpu(gspca_dev->dev->descriptor.idVendor), 1213 le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); 1214 } 1215 usb_make_path(gspca_dev->dev, (char *) cap->bus_info, 1216 sizeof(cap->bus_info)); 1217 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE 1218 | V4L2_CAP_STREAMING 1219 | V4L2_CAP_READWRITE; 1220 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 1221 return 0; 1222 } 1223 1224 static int vidioc_enum_input(struct file *file, void *priv, 1225 struct v4l2_input *input) 1226 { 1227 struct gspca_dev *gspca_dev = video_drvdata(file); 1228 1229 if (input->index != 0) 1230 return -EINVAL; 1231 input->type = V4L2_INPUT_TYPE_CAMERA; 1232 input->status = gspca_dev->cam.input_flags; 1233 strscpy(input->name, gspca_dev->sd_desc->name, 1234 sizeof input->name); 1235 return 0; 1236 } 1237 1238 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 1239 { 1240 *i = 0; 1241 return 0; 1242 } 1243 1244 static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 1245 { 1246 if (i > 0) 1247 return -EINVAL; 1248 return 0; 1249 } 1250 1251 static int vidioc_g_jpegcomp(struct file *file, void *priv, 1252 struct v4l2_jpegcompression *jpegcomp) 1253 { 1254 struct gspca_dev *gspca_dev = video_drvdata(file); 1255 1256 gspca_dev->usb_err = 0; 1257 return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); 1258 } 1259 1260 static int vidioc_s_jpegcomp(struct file *file, void *priv, 1261 const struct v4l2_jpegcompression *jpegcomp) 1262 { 1263 struct gspca_dev *gspca_dev = video_drvdata(file); 1264 1265 gspca_dev->usb_err = 0; 1266 return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); 1267 } 1268 1269 static int vidioc_g_parm(struct file *filp, void *priv, 1270 struct v4l2_streamparm *parm) 1271 { 1272 struct gspca_dev *gspca_dev = video_drvdata(filp); 1273 1274 parm->parm.capture.readbuffers = gspca_dev->queue.min_buffers_needed; 1275 1276 if (!gspca_dev->sd_desc->get_streamparm) 1277 return 0; 1278 1279 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; 1280 gspca_dev->usb_err = 0; 1281 gspca_dev->sd_desc->get_streamparm(gspca_dev, parm); 1282 return gspca_dev->usb_err; 1283 } 1284 1285 static int vidioc_s_parm(struct file *filp, void *priv, 1286 struct v4l2_streamparm *parm) 1287 { 1288 struct gspca_dev *gspca_dev = video_drvdata(filp); 1289 1290 parm->parm.capture.readbuffers = gspca_dev->queue.min_buffers_needed; 1291 1292 if (!gspca_dev->sd_desc->set_streamparm) { 1293 parm->parm.capture.capability = 0; 1294 return 0; 1295 } 1296 1297 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; 1298 gspca_dev->usb_err = 0; 1299 gspca_dev->sd_desc->set_streamparm(gspca_dev, parm); 1300 return gspca_dev->usb_err; 1301 } 1302 1303 static int gspca_queue_setup(struct vb2_queue *vq, 1304 unsigned int *nbuffers, unsigned int *nplanes, 1305 unsigned int sizes[], struct device *alloc_devs[]) 1306 { 1307 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq); 1308 unsigned int size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage); 1309 1310 if (*nplanes) 1311 return sizes[0] < size ? -EINVAL : 0; 1312 *nplanes = 1; 1313 sizes[0] = size; 1314 return 0; 1315 } 1316 1317 static int gspca_buffer_prepare(struct vb2_buffer *vb) 1318 { 1319 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue); 1320 unsigned long size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage); 1321 1322 if (vb2_plane_size(vb, 0) < size) { 1323 gspca_err(gspca_dev, "buffer too small (%lu < %lu)\n", 1324 vb2_plane_size(vb, 0), size); 1325 return -EINVAL; 1326 } 1327 return 0; 1328 } 1329 1330 static void gspca_buffer_finish(struct vb2_buffer *vb) 1331 { 1332 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue); 1333 1334 if (!gspca_dev->sd_desc->dq_callback) 1335 return; 1336 1337 gspca_dev->usb_err = 0; 1338 if (gspca_dev->present) 1339 gspca_dev->sd_desc->dq_callback(gspca_dev); 1340 } 1341 1342 static void gspca_buffer_queue(struct vb2_buffer *vb) 1343 { 1344 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue); 1345 struct gspca_buffer *buf = to_gspca_buffer(vb); 1346 unsigned long flags; 1347 1348 spin_lock_irqsave(&gspca_dev->qlock, flags); 1349 list_add_tail(&buf->list, &gspca_dev->buf_list); 1350 spin_unlock_irqrestore(&gspca_dev->qlock, flags); 1351 } 1352 1353 static void gspca_return_all_buffers(struct gspca_dev *gspca_dev, 1354 enum vb2_buffer_state state) 1355 { 1356 struct gspca_buffer *buf, *node; 1357 unsigned long flags; 1358 1359 spin_lock_irqsave(&gspca_dev->qlock, flags); 1360 list_for_each_entry_safe(buf, node, &gspca_dev->buf_list, list) { 1361 vb2_buffer_done(&buf->vb.vb2_buf, state); 1362 list_del(&buf->list); 1363 } 1364 spin_unlock_irqrestore(&gspca_dev->qlock, flags); 1365 } 1366 1367 static int gspca_start_streaming(struct vb2_queue *vq, unsigned int count) 1368 { 1369 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq); 1370 int ret; 1371 1372 gspca_dev->sequence = 0; 1373 1374 ret = gspca_init_transfer(gspca_dev); 1375 if (ret) 1376 gspca_return_all_buffers(gspca_dev, VB2_BUF_STATE_QUEUED); 1377 return ret; 1378 } 1379 1380 static void gspca_stop_streaming(struct vb2_queue *vq) 1381 { 1382 struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq); 1383 1384 gspca_stream_off(gspca_dev); 1385 1386 /* Release all active buffers */ 1387 gspca_return_all_buffers(gspca_dev, VB2_BUF_STATE_ERROR); 1388 } 1389 1390 static const struct vb2_ops gspca_qops = { 1391 .queue_setup = gspca_queue_setup, 1392 .buf_prepare = gspca_buffer_prepare, 1393 .buf_finish = gspca_buffer_finish, 1394 .buf_queue = gspca_buffer_queue, 1395 .start_streaming = gspca_start_streaming, 1396 .stop_streaming = gspca_stop_streaming, 1397 .wait_prepare = vb2_ops_wait_prepare, 1398 .wait_finish = vb2_ops_wait_finish, 1399 }; 1400 1401 static const struct v4l2_file_operations dev_fops = { 1402 .owner = THIS_MODULE, 1403 .open = v4l2_fh_open, 1404 .release = vb2_fop_release, 1405 .unlocked_ioctl = video_ioctl2, 1406 .read = vb2_fop_read, 1407 .mmap = vb2_fop_mmap, 1408 .poll = vb2_fop_poll, 1409 }; 1410 1411 static const struct v4l2_ioctl_ops dev_ioctl_ops = { 1412 .vidioc_querycap = vidioc_querycap, 1413 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 1414 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 1415 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 1416 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 1417 .vidioc_enum_input = vidioc_enum_input, 1418 .vidioc_g_input = vidioc_g_input, 1419 .vidioc_s_input = vidioc_s_input, 1420 .vidioc_g_jpegcomp = vidioc_g_jpegcomp, 1421 .vidioc_s_jpegcomp = vidioc_s_jpegcomp, 1422 .vidioc_g_parm = vidioc_g_parm, 1423 .vidioc_s_parm = vidioc_s_parm, 1424 .vidioc_enum_framesizes = vidioc_enum_framesizes, 1425 .vidioc_enum_frameintervals = vidioc_enum_frameintervals, 1426 1427 .vidioc_reqbufs = vb2_ioctl_reqbufs, 1428 .vidioc_create_bufs = vb2_ioctl_create_bufs, 1429 .vidioc_querybuf = vb2_ioctl_querybuf, 1430 .vidioc_qbuf = vb2_ioctl_qbuf, 1431 .vidioc_dqbuf = vb2_ioctl_dqbuf, 1432 .vidioc_expbuf = vb2_ioctl_expbuf, 1433 .vidioc_streamon = vb2_ioctl_streamon, 1434 .vidioc_streamoff = vb2_ioctl_streamoff, 1435 1436 #ifdef CONFIG_VIDEO_ADV_DEBUG 1437 .vidioc_g_chip_info = vidioc_g_chip_info, 1438 .vidioc_g_register = vidioc_g_register, 1439 .vidioc_s_register = vidioc_s_register, 1440 #endif 1441 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 1442 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1443 }; 1444 1445 static const struct video_device gspca_template = { 1446 .name = "gspca main driver", 1447 .fops = &dev_fops, 1448 .ioctl_ops = &dev_ioctl_ops, 1449 .release = video_device_release_empty, /* We use v4l2_dev.release */ 1450 }; 1451 1452 /* 1453 * probe and create a new gspca device 1454 * 1455 * This function must be called by the sub-driver when it is 1456 * called for probing a new device. 1457 */ 1458 int gspca_dev_probe2(struct usb_interface *intf, 1459 const struct usb_device_id *id, 1460 const struct sd_desc *sd_desc, 1461 int dev_size, 1462 struct module *module) 1463 { 1464 struct gspca_dev *gspca_dev; 1465 struct usb_device *dev = interface_to_usbdev(intf); 1466 struct vb2_queue *q; 1467 int ret; 1468 1469 pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n", 1470 sd_desc->name, id->idVendor, id->idProduct); 1471 1472 /* create the device */ 1473 if (dev_size < sizeof *gspca_dev) 1474 dev_size = sizeof *gspca_dev; 1475 gspca_dev = kzalloc(dev_size, GFP_KERNEL); 1476 if (!gspca_dev) { 1477 pr_err("couldn't kzalloc gspca struct\n"); 1478 return -ENOMEM; 1479 } 1480 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL); 1481 if (!gspca_dev->usb_buf) { 1482 pr_err("out of memory\n"); 1483 ret = -ENOMEM; 1484 goto out; 1485 } 1486 gspca_dev->dev = dev; 1487 gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber; 1488 gspca_dev->xfer_ep = -1; 1489 1490 /* check if any audio device */ 1491 if (dev->actconfig->desc.bNumInterfaces != 1) { 1492 int i; 1493 struct usb_interface *intf2; 1494 1495 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { 1496 intf2 = dev->actconfig->interface[i]; 1497 if (intf2 != NULL 1498 && intf2->altsetting != NULL 1499 && intf2->altsetting->desc.bInterfaceClass == 1500 USB_CLASS_AUDIO) { 1501 gspca_dev->audio = 1; 1502 break; 1503 } 1504 } 1505 } 1506 1507 gspca_dev->v4l2_dev.release = gspca_release; 1508 ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev); 1509 if (ret) 1510 goto out; 1511 gspca_dev->present = true; 1512 gspca_dev->sd_desc = sd_desc; 1513 gspca_dev->empty_packet = -1; /* don't check the empty packets */ 1514 gspca_dev->vdev = gspca_template; 1515 gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev; 1516 video_set_drvdata(&gspca_dev->vdev, gspca_dev); 1517 gspca_dev->module = module; 1518 1519 mutex_init(&gspca_dev->usb_lock); 1520 gspca_dev->vdev.lock = &gspca_dev->usb_lock; 1521 init_waitqueue_head(&gspca_dev->wq); 1522 1523 /* Initialize the vb2 queue */ 1524 q = &gspca_dev->queue; 1525 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1526 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ; 1527 q->drv_priv = gspca_dev; 1528 q->buf_struct_size = sizeof(struct gspca_buffer); 1529 q->ops = &gspca_qops; 1530 q->mem_ops = &vb2_vmalloc_memops; 1531 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1532 q->min_buffers_needed = 2; 1533 q->lock = &gspca_dev->usb_lock; 1534 ret = vb2_queue_init(q); 1535 if (ret) 1536 goto out; 1537 gspca_dev->vdev.queue = q; 1538 1539 INIT_LIST_HEAD(&gspca_dev->buf_list); 1540 spin_lock_init(&gspca_dev->qlock); 1541 1542 /* configure the subdriver and initialize the USB device */ 1543 ret = sd_desc->config(gspca_dev, id); 1544 if (ret < 0) 1545 goto out; 1546 ret = sd_desc->init(gspca_dev); 1547 if (ret < 0) 1548 goto out; 1549 if (sd_desc->init_controls) 1550 ret = sd_desc->init_controls(gspca_dev); 1551 if (ret < 0) 1552 goto out; 1553 gspca_set_default_mode(gspca_dev); 1554 1555 ret = gspca_input_connect(gspca_dev); 1556 if (ret) 1557 goto out; 1558 1559 #ifdef CONFIG_VIDEO_ADV_DEBUG 1560 if (!gspca_dev->sd_desc->get_register) 1561 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_REGISTER); 1562 if (!gspca_dev->sd_desc->set_register) 1563 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_S_REGISTER); 1564 #endif 1565 if (!gspca_dev->sd_desc->get_jcomp) 1566 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_G_JPEGCOMP); 1567 if (!gspca_dev->sd_desc->set_jcomp) 1568 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_S_JPEGCOMP); 1569 1570 /* init video stuff */ 1571 ret = video_register_device(&gspca_dev->vdev, 1572 VFL_TYPE_GRABBER, 1573 -1); 1574 if (ret < 0) { 1575 pr_err("video_register_device err %d\n", ret); 1576 goto out; 1577 } 1578 1579 usb_set_intfdata(intf, gspca_dev); 1580 gspca_dbg(gspca_dev, D_PROBE, "%s created\n", 1581 video_device_node_name(&gspca_dev->vdev)); 1582 1583 gspca_input_create_urb(gspca_dev); 1584 1585 return 0; 1586 out: 1587 #if IS_ENABLED(CONFIG_INPUT) 1588 if (gspca_dev->input_dev) 1589 input_unregister_device(gspca_dev->input_dev); 1590 #endif 1591 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler); 1592 kfree(gspca_dev->usb_buf); 1593 kfree(gspca_dev); 1594 return ret; 1595 } 1596 EXPORT_SYMBOL(gspca_dev_probe2); 1597 1598 /* same function as the previous one, but check the interface */ 1599 int gspca_dev_probe(struct usb_interface *intf, 1600 const struct usb_device_id *id, 1601 const struct sd_desc *sd_desc, 1602 int dev_size, 1603 struct module *module) 1604 { 1605 struct usb_device *dev = interface_to_usbdev(intf); 1606 1607 /* we don't handle multi-config cameras */ 1608 if (dev->descriptor.bNumConfigurations != 1) { 1609 pr_err("%04x:%04x too many config\n", 1610 id->idVendor, id->idProduct); 1611 return -ENODEV; 1612 } 1613 1614 /* the USB video interface must be the first one */ 1615 if (dev->actconfig->desc.bNumInterfaces != 1 1616 && intf->cur_altsetting->desc.bInterfaceNumber != 0) 1617 return -ENODEV; 1618 1619 return gspca_dev_probe2(intf, id, sd_desc, dev_size, module); 1620 } 1621 EXPORT_SYMBOL(gspca_dev_probe); 1622 1623 /* 1624 * USB disconnection 1625 * 1626 * This function must be called by the sub-driver 1627 * when the device disconnects, after the specific resources are freed. 1628 */ 1629 void gspca_disconnect(struct usb_interface *intf) 1630 { 1631 struct gspca_dev *gspca_dev = usb_get_intfdata(intf); 1632 #if IS_ENABLED(CONFIG_INPUT) 1633 struct input_dev *input_dev; 1634 #endif 1635 1636 gspca_dbg(gspca_dev, D_PROBE, "%s disconnect\n", 1637 video_device_node_name(&gspca_dev->vdev)); 1638 1639 mutex_lock(&gspca_dev->usb_lock); 1640 gspca_dev->present = false; 1641 1642 vb2_queue_error(&gspca_dev->queue); 1643 1644 #if IS_ENABLED(CONFIG_INPUT) 1645 input_dev = gspca_dev->input_dev; 1646 if (input_dev) { 1647 gspca_dev->input_dev = NULL; 1648 input_unregister_device(input_dev); 1649 } 1650 #endif 1651 1652 v4l2_device_disconnect(&gspca_dev->v4l2_dev); 1653 video_unregister_device(&gspca_dev->vdev); 1654 1655 mutex_unlock(&gspca_dev->usb_lock); 1656 1657 /* (this will call gspca_release() immediately or on last close) */ 1658 v4l2_device_put(&gspca_dev->v4l2_dev); 1659 } 1660 EXPORT_SYMBOL(gspca_disconnect); 1661 1662 #ifdef CONFIG_PM 1663 int gspca_suspend(struct usb_interface *intf, pm_message_t message) 1664 { 1665 struct gspca_dev *gspca_dev = usb_get_intfdata(intf); 1666 1667 gspca_input_destroy_urb(gspca_dev); 1668 1669 if (!vb2_start_streaming_called(&gspca_dev->queue)) 1670 return 0; 1671 1672 mutex_lock(&gspca_dev->usb_lock); 1673 gspca_dev->frozen = 1; /* avoid urb error messages */ 1674 gspca_dev->usb_err = 0; 1675 if (gspca_dev->sd_desc->stopN) 1676 gspca_dev->sd_desc->stopN(gspca_dev); 1677 destroy_urbs(gspca_dev); 1678 gspca_set_alt0(gspca_dev); 1679 if (gspca_dev->sd_desc->stop0) 1680 gspca_dev->sd_desc->stop0(gspca_dev); 1681 mutex_unlock(&gspca_dev->usb_lock); 1682 1683 return 0; 1684 } 1685 EXPORT_SYMBOL(gspca_suspend); 1686 1687 int gspca_resume(struct usb_interface *intf) 1688 { 1689 struct gspca_dev *gspca_dev = usb_get_intfdata(intf); 1690 int streaming, ret = 0; 1691 1692 mutex_lock(&gspca_dev->usb_lock); 1693 gspca_dev->frozen = 0; 1694 gspca_dev->usb_err = 0; 1695 gspca_dev->sd_desc->init(gspca_dev); 1696 /* 1697 * Most subdrivers send all ctrl values on sd_start and thus 1698 * only write to the device registers on s_ctrl when streaming -> 1699 * Clear streaming to avoid setting all ctrls twice. 1700 */ 1701 streaming = vb2_start_streaming_called(&gspca_dev->queue); 1702 if (streaming) 1703 ret = gspca_init_transfer(gspca_dev); 1704 else 1705 gspca_input_create_urb(gspca_dev); 1706 mutex_unlock(&gspca_dev->usb_lock); 1707 1708 return ret; 1709 } 1710 EXPORT_SYMBOL(gspca_resume); 1711 #endif 1712 1713 /* -- module insert / remove -- */ 1714 static int __init gspca_init(void) 1715 { 1716 pr_info("v" GSPCA_VERSION " registered\n"); 1717 return 0; 1718 } 1719 static void __exit gspca_exit(void) 1720 { 1721 } 1722 1723 module_init(gspca_init); 1724 module_exit(gspca_exit); 1725 1726 module_param_named(debug, gspca_debug, int, 0644); 1727 MODULE_PARM_DESC(debug, 1728 "1:probe 2:config 3:stream 4:frame 5:packet 6:usbi 7:usbo"); 1729