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 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software Foundation, 21 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 22 */ 23 24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 25 26 #define GSPCA_VERSION "2.14.0" 27 28 #include <linux/init.h> 29 #include <linux/fs.h> 30 #include <linux/vmalloc.h> 31 #include <linux/sched.h> 32 #include <linux/slab.h> 33 #include <linux/mm.h> 34 #include <linux/string.h> 35 #include <linux/pagemap.h> 36 #include <linux/io.h> 37 #include <asm/page.h> 38 #include <linux/uaccess.h> 39 #include <linux/ktime.h> 40 #include <media/v4l2-ioctl.h> 41 #include <media/v4l2-ctrls.h> 42 #include <media/v4l2-fh.h> 43 #include <media/v4l2-event.h> 44 45 #include "gspca.h" 46 47 #if IS_ENABLED(CONFIG_INPUT) 48 #include <linux/input.h> 49 #include <linux/usb/input.h> 50 #endif 51 52 /* global values */ 53 #define DEF_NURBS 3 /* default number of URBs */ 54 #if DEF_NURBS > MAX_NURBS 55 #error "DEF_NURBS too big" 56 #endif 57 58 MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>"); 59 MODULE_DESCRIPTION("GSPCA USB Camera Driver"); 60 MODULE_LICENSE("GPL"); 61 MODULE_VERSION(GSPCA_VERSION); 62 63 int gspca_debug; 64 EXPORT_SYMBOL(gspca_debug); 65 66 static void PDEBUG_MODE(struct gspca_dev *gspca_dev, int debug, char *txt, 67 __u32 pixfmt, int w, int h) 68 { 69 if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') { 70 PDEBUG(debug, "%s %c%c%c%c %dx%d", 71 txt, 72 pixfmt & 0xff, 73 (pixfmt >> 8) & 0xff, 74 (pixfmt >> 16) & 0xff, 75 pixfmt >> 24, 76 w, h); 77 } else { 78 PDEBUG(debug, "%s 0x%08x %dx%d", 79 txt, 80 pixfmt, 81 w, h); 82 } 83 } 84 85 /* specific memory types - !! should be different from V4L2_MEMORY_xxx */ 86 #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */ 87 #define GSPCA_MEMORY_READ 7 88 89 #define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE) 90 91 /* 92 * VMA operations. 93 */ 94 static void gspca_vm_open(struct vm_area_struct *vma) 95 { 96 struct gspca_frame *frame = vma->vm_private_data; 97 98 frame->vma_use_count++; 99 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED; 100 } 101 102 static void gspca_vm_close(struct vm_area_struct *vma) 103 { 104 struct gspca_frame *frame = vma->vm_private_data; 105 106 if (--frame->vma_use_count <= 0) 107 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED; 108 } 109 110 static const struct vm_operations_struct gspca_vm_ops = { 111 .open = gspca_vm_open, 112 .close = gspca_vm_close, 113 }; 114 115 /* 116 * Input and interrupt endpoint handling functions 117 */ 118 #if IS_ENABLED(CONFIG_INPUT) 119 static void int_irq(struct urb *urb) 120 { 121 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; 122 int ret; 123 124 ret = urb->status; 125 switch (ret) { 126 case 0: 127 if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev, 128 urb->transfer_buffer, urb->actual_length) < 0) { 129 PERR("Unknown packet received"); 130 } 131 break; 132 133 case -ENOENT: 134 case -ECONNRESET: 135 case -ENODEV: 136 case -ESHUTDOWN: 137 /* Stop is requested either by software or hardware is gone, 138 * keep the ret value non-zero and don't resubmit later. 139 */ 140 break; 141 142 default: 143 PERR("URB error %i, resubmitting", urb->status); 144 urb->status = 0; 145 ret = 0; 146 } 147 148 if (ret == 0) { 149 ret = usb_submit_urb(urb, GFP_ATOMIC); 150 if (ret < 0) 151 pr_err("Resubmit URB failed with error %i\n", ret); 152 } 153 } 154 155 static int gspca_input_connect(struct gspca_dev *dev) 156 { 157 struct input_dev *input_dev; 158 int err = 0; 159 160 dev->input_dev = NULL; 161 if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) { 162 input_dev = input_allocate_device(); 163 if (!input_dev) 164 return -ENOMEM; 165 166 usb_make_path(dev->dev, dev->phys, sizeof(dev->phys)); 167 strlcat(dev->phys, "/input0", sizeof(dev->phys)); 168 169 input_dev->name = dev->sd_desc->name; 170 input_dev->phys = dev->phys; 171 172 usb_to_input_id(dev->dev, &input_dev->id); 173 174 input_dev->evbit[0] = BIT_MASK(EV_KEY); 175 input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA); 176 input_dev->dev.parent = &dev->dev->dev; 177 178 err = input_register_device(input_dev); 179 if (err) { 180 pr_err("Input device registration failed with error %i\n", 181 err); 182 input_dev->dev.parent = NULL; 183 input_free_device(input_dev); 184 } else { 185 dev->input_dev = input_dev; 186 } 187 } 188 189 return err; 190 } 191 192 static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev, 193 struct usb_endpoint_descriptor *ep) 194 { 195 unsigned int buffer_len; 196 int interval; 197 struct urb *urb; 198 struct usb_device *dev; 199 void *buffer = NULL; 200 int ret = -EINVAL; 201 202 buffer_len = le16_to_cpu(ep->wMaxPacketSize); 203 interval = ep->bInterval; 204 PDEBUG(D_CONF, "found int in endpoint: 0x%x, " 205 "buffer_len=%u, interval=%u", 206 ep->bEndpointAddress, buffer_len, interval); 207 208 dev = gspca_dev->dev; 209 210 urb = usb_alloc_urb(0, GFP_KERNEL); 211 if (!urb) { 212 ret = -ENOMEM; 213 goto error; 214 } 215 216 buffer = usb_alloc_coherent(dev, buffer_len, 217 GFP_KERNEL, &urb->transfer_dma); 218 if (!buffer) { 219 ret = -ENOMEM; 220 goto error_buffer; 221 } 222 usb_fill_int_urb(urb, dev, 223 usb_rcvintpipe(dev, ep->bEndpointAddress), 224 buffer, buffer_len, 225 int_irq, (void *)gspca_dev, interval); 226 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 227 ret = usb_submit_urb(urb, GFP_KERNEL); 228 if (ret < 0) { 229 PERR("submit int URB failed with error %i", ret); 230 goto error_submit; 231 } 232 gspca_dev->int_urb = urb; 233 return ret; 234 235 error_submit: 236 usb_free_coherent(dev, 237 urb->transfer_buffer_length, 238 urb->transfer_buffer, 239 urb->transfer_dma); 240 error_buffer: 241 usb_free_urb(urb); 242 error: 243 return ret; 244 } 245 246 static void gspca_input_create_urb(struct gspca_dev *gspca_dev) 247 { 248 struct usb_interface *intf; 249 struct usb_host_interface *intf_desc; 250 struct usb_endpoint_descriptor *ep; 251 int i; 252 253 if (gspca_dev->sd_desc->int_pkt_scan) { 254 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); 255 intf_desc = intf->cur_altsetting; 256 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { 257 ep = &intf_desc->endpoint[i].desc; 258 if (usb_endpoint_dir_in(ep) && 259 usb_endpoint_xfer_int(ep)) { 260 261 alloc_and_submit_int_urb(gspca_dev, ep); 262 break; 263 } 264 } 265 } 266 } 267 268 static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) 269 { 270 struct urb *urb; 271 272 urb = gspca_dev->int_urb; 273 if (urb) { 274 gspca_dev->int_urb = NULL; 275 usb_kill_urb(urb); 276 usb_free_coherent(gspca_dev->dev, 277 urb->transfer_buffer_length, 278 urb->transfer_buffer, 279 urb->transfer_dma); 280 usb_free_urb(urb); 281 } 282 } 283 #else 284 static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) 285 { 286 } 287 288 static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev) 289 { 290 } 291 292 static inline int gspca_input_connect(struct gspca_dev *dev) 293 { 294 return 0; 295 } 296 #endif 297 298 /* 299 * fill a video frame from an URB and resubmit 300 */ 301 static void fill_frame(struct gspca_dev *gspca_dev, 302 struct urb *urb) 303 { 304 u8 *data; /* address of data in the iso message */ 305 int i, len, st; 306 cam_pkt_op pkt_scan; 307 308 if (urb->status != 0) { 309 if (urb->status == -ESHUTDOWN) 310 return; /* disconnection */ 311 #ifdef CONFIG_PM 312 if (gspca_dev->frozen) 313 return; 314 #endif 315 PERR("urb status: %d", urb->status); 316 urb->status = 0; 317 goto resubmit; 318 } 319 pkt_scan = gspca_dev->sd_desc->pkt_scan; 320 for (i = 0; i < urb->number_of_packets; i++) { 321 len = urb->iso_frame_desc[i].actual_length; 322 323 /* check the packet status and length */ 324 st = urb->iso_frame_desc[i].status; 325 if (st) { 326 pr_err("ISOC data error: [%d] len=%d, status=%d\n", 327 i, len, st); 328 gspca_dev->last_packet_type = DISCARD_PACKET; 329 continue; 330 } 331 if (len == 0) { 332 if (gspca_dev->empty_packet == 0) 333 gspca_dev->empty_packet = 1; 334 continue; 335 } 336 337 /* let the packet be analyzed by the subdriver */ 338 PDEBUG(D_PACK, "packet [%d] o:%d l:%d", 339 i, urb->iso_frame_desc[i].offset, len); 340 data = (u8 *) urb->transfer_buffer 341 + urb->iso_frame_desc[i].offset; 342 pkt_scan(gspca_dev, data, len); 343 } 344 345 resubmit: 346 /* resubmit the URB */ 347 st = usb_submit_urb(urb, GFP_ATOMIC); 348 if (st < 0) 349 pr_err("usb_submit_urb() ret %d\n", st); 350 } 351 352 /* 353 * ISOC message interrupt from the USB device 354 * 355 * Analyse each packet and call the subdriver for copy to the frame buffer. 356 */ 357 static void isoc_irq(struct urb *urb) 358 { 359 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; 360 361 PDEBUG(D_PACK, "isoc irq"); 362 if (!gspca_dev->streaming) 363 return; 364 fill_frame(gspca_dev, urb); 365 } 366 367 /* 368 * bulk message interrupt from the USB device 369 */ 370 static void bulk_irq(struct urb *urb) 371 { 372 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; 373 int st; 374 375 PDEBUG(D_PACK, "bulk irq"); 376 if (!gspca_dev->streaming) 377 return; 378 switch (urb->status) { 379 case 0: 380 break; 381 case -ESHUTDOWN: 382 return; /* disconnection */ 383 default: 384 #ifdef CONFIG_PM 385 if (gspca_dev->frozen) 386 return; 387 #endif 388 PERR("urb status: %d", urb->status); 389 urb->status = 0; 390 goto resubmit; 391 } 392 393 PDEBUG(D_PACK, "packet l:%d", urb->actual_length); 394 gspca_dev->sd_desc->pkt_scan(gspca_dev, 395 urb->transfer_buffer, 396 urb->actual_length); 397 398 resubmit: 399 /* resubmit the URB */ 400 if (gspca_dev->cam.bulk_nurbs != 0) { 401 st = usb_submit_urb(urb, GFP_ATOMIC); 402 if (st < 0) 403 pr_err("usb_submit_urb() ret %d\n", st); 404 } 405 } 406 407 /* 408 * add data to the current frame 409 * 410 * This function is called by the subdrivers at interrupt level. 411 * 412 * To build a frame, these ones must add 413 * - one FIRST_PACKET 414 * - 0 or many INTER_PACKETs 415 * - one LAST_PACKET 416 * DISCARD_PACKET invalidates the whole frame. 417 */ 418 void gspca_frame_add(struct gspca_dev *gspca_dev, 419 enum gspca_packet_type packet_type, 420 const u8 *data, 421 int len) 422 { 423 struct gspca_frame *frame; 424 int i, j; 425 426 PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len); 427 428 if (packet_type == FIRST_PACKET) { 429 i = atomic_read(&gspca_dev->fr_i); 430 431 /* if there are no queued buffer, discard the whole frame */ 432 if (i == atomic_read(&gspca_dev->fr_q)) { 433 gspca_dev->last_packet_type = DISCARD_PACKET; 434 gspca_dev->sequence++; 435 return; 436 } 437 j = gspca_dev->fr_queue[i]; 438 frame = &gspca_dev->frame[j]; 439 frame->v4l2_buf.timestamp = ktime_to_timeval(ktime_get()); 440 frame->v4l2_buf.sequence = gspca_dev->sequence++; 441 gspca_dev->image = frame->data; 442 gspca_dev->image_len = 0; 443 } else { 444 switch (gspca_dev->last_packet_type) { 445 case DISCARD_PACKET: 446 if (packet_type == LAST_PACKET) { 447 gspca_dev->last_packet_type = packet_type; 448 gspca_dev->image = NULL; 449 gspca_dev->image_len = 0; 450 } 451 return; 452 case LAST_PACKET: 453 return; 454 } 455 } 456 457 /* append the packet to the frame buffer */ 458 if (len > 0) { 459 if (gspca_dev->image_len + len > gspca_dev->frsz) { 460 PERR("frame overflow %d > %d", 461 gspca_dev->image_len + len, 462 gspca_dev->frsz); 463 packet_type = DISCARD_PACKET; 464 } else { 465 /* !! image is NULL only when last pkt is LAST or DISCARD 466 if (gspca_dev->image == NULL) { 467 pr_err("gspca_frame_add() image == NULL\n"); 468 return; 469 } 470 */ 471 memcpy(gspca_dev->image + gspca_dev->image_len, 472 data, len); 473 gspca_dev->image_len += len; 474 } 475 } 476 gspca_dev->last_packet_type = packet_type; 477 478 /* if last packet, invalidate packet concatenation until 479 * next first packet, wake up the application and advance 480 * in the queue */ 481 if (packet_type == LAST_PACKET) { 482 i = atomic_read(&gspca_dev->fr_i); 483 j = gspca_dev->fr_queue[i]; 484 frame = &gspca_dev->frame[j]; 485 frame->v4l2_buf.bytesused = gspca_dev->image_len; 486 frame->v4l2_buf.flags = (frame->v4l2_buf.flags 487 | V4L2_BUF_FLAG_DONE) 488 & ~V4L2_BUF_FLAG_QUEUED; 489 i = (i + 1) % GSPCA_MAX_FRAMES; 490 atomic_set(&gspca_dev->fr_i, i); 491 wake_up_interruptible(&gspca_dev->wq); /* event = new frame */ 492 PDEBUG(D_FRAM, "frame complete len:%d", 493 frame->v4l2_buf.bytesused); 494 gspca_dev->image = NULL; 495 gspca_dev->image_len = 0; 496 } 497 } 498 EXPORT_SYMBOL(gspca_frame_add); 499 500 static int frame_alloc(struct gspca_dev *gspca_dev, struct file *file, 501 enum v4l2_memory memory, unsigned int count) 502 { 503 struct gspca_frame *frame; 504 unsigned int frsz; 505 int i; 506 507 frsz = gspca_dev->pixfmt.sizeimage; 508 PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz); 509 frsz = PAGE_ALIGN(frsz); 510 if (count >= GSPCA_MAX_FRAMES) 511 count = GSPCA_MAX_FRAMES - 1; 512 gspca_dev->frbuf = vmalloc_32(frsz * count); 513 if (!gspca_dev->frbuf) { 514 pr_err("frame alloc failed\n"); 515 return -ENOMEM; 516 } 517 gspca_dev->capt_file = file; 518 gspca_dev->memory = memory; 519 gspca_dev->frsz = frsz; 520 gspca_dev->nframes = count; 521 for (i = 0; i < count; i++) { 522 frame = &gspca_dev->frame[i]; 523 frame->v4l2_buf.index = i; 524 frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 525 frame->v4l2_buf.flags = 0; 526 frame->v4l2_buf.field = V4L2_FIELD_NONE; 527 frame->v4l2_buf.length = frsz; 528 frame->v4l2_buf.memory = memory; 529 frame->v4l2_buf.sequence = 0; 530 frame->data = gspca_dev->frbuf + i * frsz; 531 frame->v4l2_buf.m.offset = i * frsz; 532 } 533 atomic_set(&gspca_dev->fr_q, 0); 534 atomic_set(&gspca_dev->fr_i, 0); 535 gspca_dev->fr_o = 0; 536 return 0; 537 } 538 539 static void frame_free(struct gspca_dev *gspca_dev) 540 { 541 int i; 542 543 PDEBUG(D_STREAM, "frame free"); 544 if (gspca_dev->frbuf != NULL) { 545 vfree(gspca_dev->frbuf); 546 gspca_dev->frbuf = NULL; 547 for (i = 0; i < gspca_dev->nframes; i++) 548 gspca_dev->frame[i].data = NULL; 549 } 550 gspca_dev->nframes = 0; 551 gspca_dev->frsz = 0; 552 gspca_dev->capt_file = NULL; 553 gspca_dev->memory = GSPCA_MEMORY_NO; 554 } 555 556 static void destroy_urbs(struct gspca_dev *gspca_dev) 557 { 558 struct urb *urb; 559 unsigned int i; 560 561 PDEBUG(D_STREAM, "kill transfer"); 562 for (i = 0; i < MAX_NURBS; i++) { 563 urb = gspca_dev->urb[i]; 564 if (urb == NULL) 565 break; 566 567 gspca_dev->urb[i] = NULL; 568 usb_kill_urb(urb); 569 usb_free_coherent(gspca_dev->dev, 570 urb->transfer_buffer_length, 571 urb->transfer_buffer, 572 urb->transfer_dma); 573 usb_free_urb(urb); 574 } 575 } 576 577 static int gspca_set_alt0(struct gspca_dev *gspca_dev) 578 { 579 int ret; 580 581 if (gspca_dev->alt == 0) 582 return 0; 583 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0); 584 if (ret < 0) 585 pr_err("set alt 0 err %d\n", ret); 586 return ret; 587 } 588 589 /* Note: both the queue and the usb locks should be held when calling this */ 590 static void gspca_stream_off(struct gspca_dev *gspca_dev) 591 { 592 gspca_dev->streaming = 0; 593 gspca_dev->usb_err = 0; 594 if (gspca_dev->sd_desc->stopN) 595 gspca_dev->sd_desc->stopN(gspca_dev); 596 destroy_urbs(gspca_dev); 597 gspca_input_destroy_urb(gspca_dev); 598 gspca_set_alt0(gspca_dev); 599 gspca_input_create_urb(gspca_dev); 600 if (gspca_dev->sd_desc->stop0) 601 gspca_dev->sd_desc->stop0(gspca_dev); 602 PDEBUG(D_STREAM, "stream off OK"); 603 } 604 605 /* 606 * look for an input transfer endpoint in an alternate setting. 607 * 608 * If xfer_ep is invalid, return the first valid ep found, otherwise 609 * look for exactly the ep with address equal to xfer_ep. 610 */ 611 static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, 612 int xfer, int xfer_ep) 613 { 614 struct usb_host_endpoint *ep; 615 int i, attr; 616 617 for (i = 0; i < alt->desc.bNumEndpoints; i++) { 618 ep = &alt->endpoint[i]; 619 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; 620 if (attr == xfer 621 && ep->desc.wMaxPacketSize != 0 622 && usb_endpoint_dir_in(&ep->desc) 623 && (xfer_ep < 0 || ep->desc.bEndpointAddress == xfer_ep)) 624 return ep; 625 } 626 return NULL; 627 } 628 629 /* compute the minimum bandwidth for the current transfer */ 630 static u32 which_bandwidth(struct gspca_dev *gspca_dev) 631 { 632 u32 bandwidth; 633 634 /* get the (max) image size */ 635 bandwidth = gspca_dev->pixfmt.sizeimage; 636 637 /* if the image is compressed, estimate its mean size */ 638 if (!gspca_dev->cam.needs_full_bandwidth && 639 bandwidth < gspca_dev->pixfmt.width * 640 gspca_dev->pixfmt.height) 641 bandwidth = bandwidth * 3 / 8; /* 0.375 */ 642 643 /* estimate the frame rate */ 644 if (gspca_dev->sd_desc->get_streamparm) { 645 struct v4l2_streamparm parm; 646 647 gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm); 648 bandwidth *= parm.parm.capture.timeperframe.denominator; 649 bandwidth /= parm.parm.capture.timeperframe.numerator; 650 } else { 651 652 /* don't hope more than 15 fps with USB 1.1 and 653 * image resolution >= 640x480 */ 654 if (gspca_dev->pixfmt.width >= 640 655 && gspca_dev->dev->speed == USB_SPEED_FULL) 656 bandwidth *= 15; /* 15 fps */ 657 else 658 bandwidth *= 30; /* 30 fps */ 659 } 660 661 PDEBUG(D_STREAM, "min bandwidth: %d", bandwidth); 662 return bandwidth; 663 } 664 665 /* endpoint table */ 666 #define MAX_ALT 16 667 struct ep_tb_s { 668 u32 alt; 669 u32 bandwidth; 670 }; 671 672 /* 673 * build the table of the endpoints 674 * and compute the minimum bandwidth for the image transfer 675 */ 676 static int build_isoc_ep_tb(struct gspca_dev *gspca_dev, 677 struct usb_interface *intf, 678 struct ep_tb_s *ep_tb) 679 { 680 struct usb_host_endpoint *ep; 681 int i, j, nbalt, psize, found; 682 u32 bandwidth, last_bw; 683 684 nbalt = intf->num_altsetting; 685 if (nbalt > MAX_ALT) 686 nbalt = MAX_ALT; /* fixme: should warn */ 687 688 /* build the endpoint table */ 689 i = 0; 690 last_bw = 0; 691 for (;;) { 692 ep_tb->bandwidth = 2000 * 2000 * 120; 693 found = 0; 694 for (j = 0; j < nbalt; j++) { 695 ep = alt_xfer(&intf->altsetting[j], 696 USB_ENDPOINT_XFER_ISOC, 697 gspca_dev->xfer_ep); 698 if (ep == NULL) 699 continue; 700 if (ep->desc.bInterval == 0) { 701 pr_err("alt %d iso endp with 0 interval\n", j); 702 continue; 703 } 704 psize = le16_to_cpu(ep->desc.wMaxPacketSize); 705 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); 706 bandwidth = psize * 1000; 707 if (gspca_dev->dev->speed == USB_SPEED_HIGH 708 || gspca_dev->dev->speed == USB_SPEED_SUPER) 709 bandwidth *= 8; 710 bandwidth /= 1 << (ep->desc.bInterval - 1); 711 if (bandwidth <= last_bw) 712 continue; 713 if (bandwidth < ep_tb->bandwidth) { 714 ep_tb->bandwidth = bandwidth; 715 ep_tb->alt = j; 716 found = 1; 717 } 718 } 719 if (!found) 720 break; 721 PDEBUG(D_STREAM, "alt %d bandwidth %d", 722 ep_tb->alt, ep_tb->bandwidth); 723 last_bw = ep_tb->bandwidth; 724 i++; 725 ep_tb++; 726 } 727 728 /* 729 * If the camera: 730 * has a usb audio class interface (a built in usb mic); and 731 * is a usb 1 full speed device; and 732 * uses the max full speed iso bandwidth; and 733 * and has more than 1 alt setting 734 * then skip the highest alt setting to spare bandwidth for the mic 735 */ 736 if (gspca_dev->audio && 737 gspca_dev->dev->speed == USB_SPEED_FULL && 738 last_bw >= 1000000 && 739 i > 1) { 740 PDEBUG(D_STREAM, "dev has usb audio, skipping highest alt"); 741 i--; 742 ep_tb--; 743 } 744 745 /* get the requested bandwidth and start at the highest atlsetting */ 746 bandwidth = which_bandwidth(gspca_dev); 747 ep_tb--; 748 while (i > 1) { 749 ep_tb--; 750 if (ep_tb->bandwidth < bandwidth) 751 break; 752 i--; 753 } 754 return i; 755 } 756 757 /* 758 * create the URBs for image transfer 759 */ 760 static int create_urbs(struct gspca_dev *gspca_dev, 761 struct usb_host_endpoint *ep) 762 { 763 struct urb *urb; 764 int n, nurbs, i, psize, npkt, bsize; 765 766 /* calculate the packet size and the number of packets */ 767 psize = le16_to_cpu(ep->desc.wMaxPacketSize); 768 769 if (!gspca_dev->cam.bulk) { /* isoc */ 770 771 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ 772 if (gspca_dev->pkt_size == 0) 773 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); 774 else 775 psize = gspca_dev->pkt_size; 776 npkt = gspca_dev->cam.npkt; 777 if (npkt == 0) 778 npkt = 32; /* default value */ 779 bsize = psize * npkt; 780 PDEBUG(D_STREAM, 781 "isoc %d pkts size %d = bsize:%d", 782 npkt, psize, bsize); 783 nurbs = DEF_NURBS; 784 } else { /* bulk */ 785 npkt = 0; 786 bsize = gspca_dev->cam.bulk_size; 787 if (bsize == 0) 788 bsize = psize; 789 PDEBUG(D_STREAM, "bulk bsize:%d", bsize); 790 if (gspca_dev->cam.bulk_nurbs != 0) 791 nurbs = gspca_dev->cam.bulk_nurbs; 792 else 793 nurbs = 1; 794 } 795 796 for (n = 0; n < nurbs; n++) { 797 urb = usb_alloc_urb(npkt, GFP_KERNEL); 798 if (!urb) { 799 pr_err("usb_alloc_urb failed\n"); 800 return -ENOMEM; 801 } 802 gspca_dev->urb[n] = urb; 803 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev, 804 bsize, 805 GFP_KERNEL, 806 &urb->transfer_dma); 807 808 if (urb->transfer_buffer == NULL) { 809 pr_err("usb_alloc_coherent failed\n"); 810 return -ENOMEM; 811 } 812 urb->dev = gspca_dev->dev; 813 urb->context = gspca_dev; 814 urb->transfer_buffer_length = bsize; 815 if (npkt != 0) { /* ISOC */ 816 urb->pipe = usb_rcvisocpipe(gspca_dev->dev, 817 ep->desc.bEndpointAddress); 818 urb->transfer_flags = URB_ISO_ASAP 819 | URB_NO_TRANSFER_DMA_MAP; 820 urb->interval = 1 << (ep->desc.bInterval - 1); 821 urb->complete = isoc_irq; 822 urb->number_of_packets = npkt; 823 for (i = 0; i < npkt; i++) { 824 urb->iso_frame_desc[i].length = psize; 825 urb->iso_frame_desc[i].offset = psize * i; 826 } 827 } else { /* bulk */ 828 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev, 829 ep->desc.bEndpointAddress); 830 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; 831 urb->complete = bulk_irq; 832 } 833 } 834 return 0; 835 } 836 837 /* 838 * start the USB transfer 839 */ 840 static int gspca_init_transfer(struct gspca_dev *gspca_dev) 841 { 842 struct usb_interface *intf; 843 struct usb_host_endpoint *ep; 844 struct urb *urb; 845 struct ep_tb_s ep_tb[MAX_ALT]; 846 int n, ret, xfer, alt, alt_idx; 847 848 /* reset the streaming variables */ 849 gspca_dev->image = NULL; 850 gspca_dev->image_len = 0; 851 gspca_dev->last_packet_type = DISCARD_PACKET; 852 gspca_dev->sequence = 0; 853 854 gspca_dev->usb_err = 0; 855 856 /* do the specific subdriver stuff before endpoint selection */ 857 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); 858 gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0; 859 if (gspca_dev->sd_desc->isoc_init) { 860 ret = gspca_dev->sd_desc->isoc_init(gspca_dev); 861 if (ret < 0) 862 return ret; 863 } 864 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK 865 : USB_ENDPOINT_XFER_ISOC; 866 867 /* if bulk or the subdriver forced an altsetting, get the endpoint */ 868 if (gspca_dev->alt != 0) { 869 gspca_dev->alt--; /* (previous version compatibility) */ 870 ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer, 871 gspca_dev->xfer_ep); 872 if (ep == NULL) { 873 pr_err("bad altsetting %d\n", gspca_dev->alt); 874 return -EIO; 875 } 876 ep_tb[0].alt = gspca_dev->alt; 877 alt_idx = 1; 878 } else { 879 880 /* else, compute the minimum bandwidth 881 * and build the endpoint table */ 882 alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb); 883 if (alt_idx <= 0) { 884 pr_err("no transfer endpoint found\n"); 885 return -EIO; 886 } 887 } 888 889 /* set the highest alternate setting and 890 * loop until urb submit succeeds */ 891 gspca_input_destroy_urb(gspca_dev); 892 893 gspca_dev->alt = ep_tb[--alt_idx].alt; 894 alt = -1; 895 for (;;) { 896 if (alt != gspca_dev->alt) { 897 alt = gspca_dev->alt; 898 if (intf->num_altsetting > 1) { 899 ret = usb_set_interface(gspca_dev->dev, 900 gspca_dev->iface, 901 alt); 902 if (ret < 0) { 903 if (ret == -ENOSPC) 904 goto retry; /*fixme: ugly*/ 905 pr_err("set alt %d err %d\n", alt, ret); 906 goto out; 907 } 908 } 909 } 910 if (!gspca_dev->cam.no_urb_create) { 911 PDEBUG(D_STREAM, "init transfer alt %d", alt); 912 ret = create_urbs(gspca_dev, 913 alt_xfer(&intf->altsetting[alt], xfer, 914 gspca_dev->xfer_ep)); 915 if (ret < 0) { 916 destroy_urbs(gspca_dev); 917 goto out; 918 } 919 } 920 921 /* clear the bulk endpoint */ 922 if (gspca_dev->cam.bulk) 923 usb_clear_halt(gspca_dev->dev, 924 gspca_dev->urb[0]->pipe); 925 926 /* start the cam */ 927 ret = gspca_dev->sd_desc->start(gspca_dev); 928 if (ret < 0) { 929 destroy_urbs(gspca_dev); 930 goto out; 931 } 932 gspca_dev->streaming = 1; 933 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler); 934 935 /* some bulk transfers are started by the subdriver */ 936 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0) 937 break; 938 939 /* submit the URBs */ 940 for (n = 0; n < MAX_NURBS; n++) { 941 urb = gspca_dev->urb[n]; 942 if (urb == NULL) 943 break; 944 ret = usb_submit_urb(urb, GFP_KERNEL); 945 if (ret < 0) 946 break; 947 } 948 if (ret >= 0) 949 break; /* transfer is started */ 950 951 /* something when wrong 952 * stop the webcam and free the transfer resources */ 953 gspca_stream_off(gspca_dev); 954 if (ret != -ENOSPC) { 955 pr_err("usb_submit_urb alt %d err %d\n", 956 gspca_dev->alt, ret); 957 goto out; 958 } 959 960 /* the bandwidth is not wide enough 961 * negotiate or try a lower alternate setting */ 962 retry: 963 PERR("alt %d - bandwidth not wide enough, trying again", alt); 964 msleep(20); /* wait for kill complete */ 965 if (gspca_dev->sd_desc->isoc_nego) { 966 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev); 967 if (ret < 0) 968 goto out; 969 } else { 970 if (alt_idx <= 0) { 971 pr_err("no transfer endpoint found\n"); 972 ret = -EIO; 973 goto out; 974 } 975 gspca_dev->alt = ep_tb[--alt_idx].alt; 976 } 977 } 978 out: 979 gspca_input_create_urb(gspca_dev); 980 return ret; 981 } 982 983 static void gspca_set_default_mode(struct gspca_dev *gspca_dev) 984 { 985 int i; 986 987 i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ 988 gspca_dev->curr_mode = i; 989 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i]; 990 991 /* does nothing if ctrl_handler == NULL */ 992 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler); 993 } 994 995 static int wxh_to_mode(struct gspca_dev *gspca_dev, 996 int width, int height) 997 { 998 int i; 999 1000 for (i = gspca_dev->cam.nmodes; --i > 0; ) { 1001 if (width >= gspca_dev->cam.cam_mode[i].width 1002 && height >= gspca_dev->cam.cam_mode[i].height) 1003 break; 1004 } 1005 return i; 1006 } 1007 1008 /* 1009 * search a mode with the right pixel format 1010 */ 1011 static int gspca_get_mode(struct gspca_dev *gspca_dev, 1012 int mode, 1013 int pixfmt) 1014 { 1015 int modeU, modeD; 1016 1017 modeU = modeD = mode; 1018 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { 1019 if (--modeD >= 0) { 1020 if (gspca_dev->cam.cam_mode[modeD].pixelformat 1021 == pixfmt) 1022 return modeD; 1023 } 1024 if (++modeU < gspca_dev->cam.nmodes) { 1025 if (gspca_dev->cam.cam_mode[modeU].pixelformat 1026 == pixfmt) 1027 return modeU; 1028 } 1029 } 1030 return -EINVAL; 1031 } 1032 1033 #ifdef CONFIG_VIDEO_ADV_DEBUG 1034 static int vidioc_g_chip_info(struct file *file, void *priv, 1035 struct v4l2_dbg_chip_info *chip) 1036 { 1037 struct gspca_dev *gspca_dev = video_drvdata(file); 1038 1039 gspca_dev->usb_err = 0; 1040 if (gspca_dev->sd_desc->get_chip_info) 1041 return gspca_dev->sd_desc->get_chip_info(gspca_dev, chip); 1042 return chip->match.addr ? -EINVAL : 0; 1043 } 1044 1045 static int vidioc_g_register(struct file *file, void *priv, 1046 struct v4l2_dbg_register *reg) 1047 { 1048 struct gspca_dev *gspca_dev = video_drvdata(file); 1049 1050 gspca_dev->usb_err = 0; 1051 return gspca_dev->sd_desc->get_register(gspca_dev, reg); 1052 } 1053 1054 static int vidioc_s_register(struct file *file, void *priv, 1055 const struct v4l2_dbg_register *reg) 1056 { 1057 struct gspca_dev *gspca_dev = video_drvdata(file); 1058 1059 gspca_dev->usb_err = 0; 1060 return gspca_dev->sd_desc->set_register(gspca_dev, reg); 1061 } 1062 #endif 1063 1064 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 1065 struct v4l2_fmtdesc *fmtdesc) 1066 { 1067 struct gspca_dev *gspca_dev = video_drvdata(file); 1068 int i, j, index; 1069 __u32 fmt_tb[8]; 1070 1071 /* give an index to each format */ 1072 index = 0; 1073 j = 0; 1074 for (i = gspca_dev->cam.nmodes; --i >= 0; ) { 1075 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; 1076 j = 0; 1077 for (;;) { 1078 if (fmt_tb[j] == fmt_tb[index]) 1079 break; 1080 j++; 1081 } 1082 if (j == index) { 1083 if (fmtdesc->index == index) 1084 break; /* new format */ 1085 index++; 1086 if (index >= ARRAY_SIZE(fmt_tb)) 1087 return -EINVAL; 1088 } 1089 } 1090 if (i < 0) 1091 return -EINVAL; /* no more format */ 1092 1093 fmtdesc->pixelformat = fmt_tb[index]; 1094 if (gspca_dev->cam.cam_mode[i].sizeimage < 1095 gspca_dev->cam.cam_mode[i].width * 1096 gspca_dev->cam.cam_mode[i].height) 1097 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; 1098 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; 1099 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; 1100 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; 1101 fmtdesc->description[3] = fmtdesc->pixelformat >> 24; 1102 fmtdesc->description[4] = '\0'; 1103 return 0; 1104 } 1105 1106 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 1107 struct v4l2_format *fmt) 1108 { 1109 struct gspca_dev *gspca_dev = video_drvdata(file); 1110 1111 fmt->fmt.pix = gspca_dev->pixfmt; 1112 /* some drivers use priv internally, zero it before giving it back to 1113 the core */ 1114 fmt->fmt.pix.priv = 0; 1115 return 0; 1116 } 1117 1118 static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, 1119 struct v4l2_format *fmt) 1120 { 1121 int w, h, mode, mode2; 1122 1123 w = fmt->fmt.pix.width; 1124 h = fmt->fmt.pix.height; 1125 1126 PDEBUG_MODE(gspca_dev, D_CONF, "try fmt cap", 1127 fmt->fmt.pix.pixelformat, w, h); 1128 1129 /* search the closest mode for width and height */ 1130 mode = wxh_to_mode(gspca_dev, w, h); 1131 1132 /* OK if right palette */ 1133 if (gspca_dev->cam.cam_mode[mode].pixelformat 1134 != fmt->fmt.pix.pixelformat) { 1135 1136 /* else, search the closest mode with the same pixel format */ 1137 mode2 = gspca_get_mode(gspca_dev, mode, 1138 fmt->fmt.pix.pixelformat); 1139 if (mode2 >= 0) 1140 mode = mode2; 1141 } 1142 fmt->fmt.pix = gspca_dev->cam.cam_mode[mode]; 1143 if (gspca_dev->sd_desc->try_fmt) { 1144 /* pass original resolution to subdriver try_fmt */ 1145 fmt->fmt.pix.width = w; 1146 fmt->fmt.pix.height = h; 1147 gspca_dev->sd_desc->try_fmt(gspca_dev, fmt); 1148 } 1149 /* some drivers use priv internally, zero it before giving it back to 1150 the core */ 1151 fmt->fmt.pix.priv = 0; 1152 return mode; /* used when s_fmt */ 1153 } 1154 1155 static int vidioc_try_fmt_vid_cap(struct file *file, 1156 void *priv, 1157 struct v4l2_format *fmt) 1158 { 1159 struct gspca_dev *gspca_dev = video_drvdata(file); 1160 int ret; 1161 1162 ret = try_fmt_vid_cap(gspca_dev, fmt); 1163 if (ret < 0) 1164 return ret; 1165 return 0; 1166 } 1167 1168 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 1169 struct v4l2_format *fmt) 1170 { 1171 struct gspca_dev *gspca_dev = video_drvdata(file); 1172 int ret; 1173 1174 if (mutex_lock_interruptible(&gspca_dev->queue_lock)) 1175 return -ERESTARTSYS; 1176 1177 ret = try_fmt_vid_cap(gspca_dev, fmt); 1178 if (ret < 0) 1179 goto out; 1180 1181 if (gspca_dev->nframes != 0 1182 && fmt->fmt.pix.sizeimage > gspca_dev->frsz) { 1183 ret = -EINVAL; 1184 goto out; 1185 } 1186 1187 if (gspca_dev->streaming) { 1188 ret = -EBUSY; 1189 goto out; 1190 } 1191 gspca_dev->curr_mode = ret; 1192 if (gspca_dev->sd_desc->try_fmt) 1193 /* subdriver try_fmt can modify format parameters */ 1194 gspca_dev->pixfmt = fmt->fmt.pix; 1195 else 1196 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[ret]; 1197 1198 ret = 0; 1199 out: 1200 mutex_unlock(&gspca_dev->queue_lock); 1201 return ret; 1202 } 1203 1204 static int vidioc_enum_framesizes(struct file *file, void *priv, 1205 struct v4l2_frmsizeenum *fsize) 1206 { 1207 struct gspca_dev *gspca_dev = video_drvdata(file); 1208 int i; 1209 __u32 index = 0; 1210 1211 if (gspca_dev->sd_desc->enum_framesizes) 1212 return gspca_dev->sd_desc->enum_framesizes(gspca_dev, fsize); 1213 1214 for (i = 0; i < gspca_dev->cam.nmodes; i++) { 1215 if (fsize->pixel_format != 1216 gspca_dev->cam.cam_mode[i].pixelformat) 1217 continue; 1218 1219 if (fsize->index == index) { 1220 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 1221 fsize->discrete.width = 1222 gspca_dev->cam.cam_mode[i].width; 1223 fsize->discrete.height = 1224 gspca_dev->cam.cam_mode[i].height; 1225 return 0; 1226 } 1227 index++; 1228 } 1229 1230 return -EINVAL; 1231 } 1232 1233 static int vidioc_enum_frameintervals(struct file *filp, void *priv, 1234 struct v4l2_frmivalenum *fival) 1235 { 1236 struct gspca_dev *gspca_dev = video_drvdata(filp); 1237 int mode = wxh_to_mode(gspca_dev, fival->width, fival->height); 1238 __u32 i; 1239 1240 if (gspca_dev->cam.mode_framerates == NULL || 1241 gspca_dev->cam.mode_framerates[mode].nrates == 0) 1242 return -EINVAL; 1243 1244 if (fival->pixel_format != 1245 gspca_dev->cam.cam_mode[mode].pixelformat) 1246 return -EINVAL; 1247 1248 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) { 1249 if (fival->index == i) { 1250 fival->type = V4L2_FRMSIZE_TYPE_DISCRETE; 1251 fival->discrete.numerator = 1; 1252 fival->discrete.denominator = 1253 gspca_dev->cam.mode_framerates[mode].rates[i]; 1254 return 0; 1255 } 1256 } 1257 1258 return -EINVAL; 1259 } 1260 1261 static void gspca_release(struct v4l2_device *v4l2_device) 1262 { 1263 struct gspca_dev *gspca_dev = 1264 container_of(v4l2_device, struct gspca_dev, v4l2_dev); 1265 1266 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler); 1267 v4l2_device_unregister(&gspca_dev->v4l2_dev); 1268 kfree(gspca_dev->usb_buf); 1269 kfree(gspca_dev); 1270 } 1271 1272 static int dev_open(struct file *file) 1273 { 1274 struct gspca_dev *gspca_dev = video_drvdata(file); 1275 int ret; 1276 1277 PDEBUG(D_STREAM, "[%s] open", current->comm); 1278 1279 /* protect the subdriver against rmmod */ 1280 if (!try_module_get(gspca_dev->module)) 1281 return -ENODEV; 1282 1283 ret = v4l2_fh_open(file); 1284 if (ret) 1285 module_put(gspca_dev->module); 1286 return ret; 1287 } 1288 1289 static int dev_close(struct file *file) 1290 { 1291 struct gspca_dev *gspca_dev = video_drvdata(file); 1292 1293 PDEBUG(D_STREAM, "[%s] close", current->comm); 1294 1295 /* Needed for gspca_stream_off, always lock before queue_lock! */ 1296 if (mutex_lock_interruptible(&gspca_dev->usb_lock)) 1297 return -ERESTARTSYS; 1298 1299 if (mutex_lock_interruptible(&gspca_dev->queue_lock)) { 1300 mutex_unlock(&gspca_dev->usb_lock); 1301 return -ERESTARTSYS; 1302 } 1303 1304 /* if the file did the capture, free the streaming resources */ 1305 if (gspca_dev->capt_file == file) { 1306 if (gspca_dev->streaming) 1307 gspca_stream_off(gspca_dev); 1308 frame_free(gspca_dev); 1309 } 1310 module_put(gspca_dev->module); 1311 mutex_unlock(&gspca_dev->queue_lock); 1312 mutex_unlock(&gspca_dev->usb_lock); 1313 1314 PDEBUG(D_STREAM, "close done"); 1315 1316 return v4l2_fh_release(file); 1317 } 1318 1319 static int vidioc_querycap(struct file *file, void *priv, 1320 struct v4l2_capability *cap) 1321 { 1322 struct gspca_dev *gspca_dev = video_drvdata(file); 1323 1324 strlcpy((char *) cap->driver, gspca_dev->sd_desc->name, 1325 sizeof cap->driver); 1326 if (gspca_dev->dev->product != NULL) { 1327 strlcpy((char *) cap->card, gspca_dev->dev->product, 1328 sizeof cap->card); 1329 } else { 1330 snprintf((char *) cap->card, sizeof cap->card, 1331 "USB Camera (%04x:%04x)", 1332 le16_to_cpu(gspca_dev->dev->descriptor.idVendor), 1333 le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); 1334 } 1335 usb_make_path(gspca_dev->dev, (char *) cap->bus_info, 1336 sizeof(cap->bus_info)); 1337 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE 1338 | V4L2_CAP_STREAMING 1339 | V4L2_CAP_READWRITE; 1340 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 1341 return 0; 1342 } 1343 1344 static int vidioc_enum_input(struct file *file, void *priv, 1345 struct v4l2_input *input) 1346 { 1347 struct gspca_dev *gspca_dev = video_drvdata(file); 1348 1349 if (input->index != 0) 1350 return -EINVAL; 1351 input->type = V4L2_INPUT_TYPE_CAMERA; 1352 input->status = gspca_dev->cam.input_flags; 1353 strlcpy(input->name, gspca_dev->sd_desc->name, 1354 sizeof input->name); 1355 return 0; 1356 } 1357 1358 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 1359 { 1360 *i = 0; 1361 return 0; 1362 } 1363 1364 static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 1365 { 1366 if (i > 0) 1367 return -EINVAL; 1368 return (0); 1369 } 1370 1371 static int vidioc_reqbufs(struct file *file, void *priv, 1372 struct v4l2_requestbuffers *rb) 1373 { 1374 struct gspca_dev *gspca_dev = video_drvdata(file); 1375 int i, ret = 0, streaming; 1376 1377 i = rb->memory; /* (avoid compilation warning) */ 1378 switch (i) { 1379 case GSPCA_MEMORY_READ: /* (internal call) */ 1380 case V4L2_MEMORY_MMAP: 1381 case V4L2_MEMORY_USERPTR: 1382 break; 1383 default: 1384 return -EINVAL; 1385 } 1386 if (mutex_lock_interruptible(&gspca_dev->queue_lock)) 1387 return -ERESTARTSYS; 1388 1389 if (gspca_dev->memory != GSPCA_MEMORY_NO 1390 && gspca_dev->memory != GSPCA_MEMORY_READ 1391 && gspca_dev->memory != rb->memory) { 1392 ret = -EBUSY; 1393 goto out; 1394 } 1395 1396 /* only one file may do the capture */ 1397 if (gspca_dev->capt_file != NULL 1398 && gspca_dev->capt_file != file) { 1399 ret = -EBUSY; 1400 goto out; 1401 } 1402 1403 /* if allocated, the buffers must not be mapped */ 1404 for (i = 0; i < gspca_dev->nframes; i++) { 1405 if (gspca_dev->frame[i].vma_use_count) { 1406 ret = -EBUSY; 1407 goto out; 1408 } 1409 } 1410 1411 /* stop streaming */ 1412 streaming = gspca_dev->streaming; 1413 if (streaming) { 1414 gspca_stream_off(gspca_dev); 1415 1416 /* Don't restart the stream when switching from read 1417 * to mmap mode */ 1418 if (gspca_dev->memory == GSPCA_MEMORY_READ) 1419 streaming = 0; 1420 } 1421 1422 /* free the previous allocated buffers, if any */ 1423 if (gspca_dev->nframes != 0) 1424 frame_free(gspca_dev); 1425 if (rb->count == 0) /* unrequest */ 1426 goto out; 1427 ret = frame_alloc(gspca_dev, file, rb->memory, rb->count); 1428 if (ret == 0) { 1429 rb->count = gspca_dev->nframes; 1430 if (streaming) 1431 ret = gspca_init_transfer(gspca_dev); 1432 } 1433 out: 1434 mutex_unlock(&gspca_dev->queue_lock); 1435 PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); 1436 return ret; 1437 } 1438 1439 static int vidioc_querybuf(struct file *file, void *priv, 1440 struct v4l2_buffer *v4l2_buf) 1441 { 1442 struct gspca_dev *gspca_dev = video_drvdata(file); 1443 struct gspca_frame *frame; 1444 1445 if (v4l2_buf->index >= gspca_dev->nframes) 1446 return -EINVAL; 1447 1448 frame = &gspca_dev->frame[v4l2_buf->index]; 1449 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); 1450 return 0; 1451 } 1452 1453 static int vidioc_streamon(struct file *file, void *priv, 1454 enum v4l2_buf_type buf_type) 1455 { 1456 struct gspca_dev *gspca_dev = video_drvdata(file); 1457 int ret; 1458 1459 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 1460 return -EINVAL; 1461 if (mutex_lock_interruptible(&gspca_dev->queue_lock)) 1462 return -ERESTARTSYS; 1463 1464 /* check the capture file */ 1465 if (gspca_dev->capt_file != file) { 1466 ret = -EBUSY; 1467 goto out; 1468 } 1469 1470 if (gspca_dev->nframes == 0 1471 || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) { 1472 ret = -EINVAL; 1473 goto out; 1474 } 1475 if (!gspca_dev->streaming) { 1476 ret = gspca_init_transfer(gspca_dev); 1477 if (ret < 0) 1478 goto out; 1479 } 1480 PDEBUG_MODE(gspca_dev, D_STREAM, "stream on OK", 1481 gspca_dev->pixfmt.pixelformat, 1482 gspca_dev->pixfmt.width, gspca_dev->pixfmt.height); 1483 ret = 0; 1484 out: 1485 mutex_unlock(&gspca_dev->queue_lock); 1486 return ret; 1487 } 1488 1489 static int vidioc_streamoff(struct file *file, void *priv, 1490 enum v4l2_buf_type buf_type) 1491 { 1492 struct gspca_dev *gspca_dev = video_drvdata(file); 1493 int i, ret; 1494 1495 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 1496 return -EINVAL; 1497 1498 if (mutex_lock_interruptible(&gspca_dev->queue_lock)) 1499 return -ERESTARTSYS; 1500 1501 if (!gspca_dev->streaming) { 1502 ret = 0; 1503 goto out; 1504 } 1505 1506 /* check the capture file */ 1507 if (gspca_dev->capt_file != file) { 1508 ret = -EBUSY; 1509 goto out; 1510 } 1511 1512 /* stop streaming */ 1513 gspca_stream_off(gspca_dev); 1514 /* In case another thread is waiting in dqbuf */ 1515 wake_up_interruptible(&gspca_dev->wq); 1516 1517 /* empty the transfer queues */ 1518 for (i = 0; i < gspca_dev->nframes; i++) 1519 gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS; 1520 atomic_set(&gspca_dev->fr_q, 0); 1521 atomic_set(&gspca_dev->fr_i, 0); 1522 gspca_dev->fr_o = 0; 1523 ret = 0; 1524 out: 1525 mutex_unlock(&gspca_dev->queue_lock); 1526 return ret; 1527 } 1528 1529 static int vidioc_g_jpegcomp(struct file *file, void *priv, 1530 struct v4l2_jpegcompression *jpegcomp) 1531 { 1532 struct gspca_dev *gspca_dev = video_drvdata(file); 1533 1534 gspca_dev->usb_err = 0; 1535 return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); 1536 } 1537 1538 static int vidioc_s_jpegcomp(struct file *file, void *priv, 1539 const struct v4l2_jpegcompression *jpegcomp) 1540 { 1541 struct gspca_dev *gspca_dev = video_drvdata(file); 1542 1543 gspca_dev->usb_err = 0; 1544 return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); 1545 } 1546 1547 static int vidioc_g_parm(struct file *filp, void *priv, 1548 struct v4l2_streamparm *parm) 1549 { 1550 struct gspca_dev *gspca_dev = video_drvdata(filp); 1551 1552 parm->parm.capture.readbuffers = gspca_dev->nbufread; 1553 1554 if (gspca_dev->sd_desc->get_streamparm) { 1555 gspca_dev->usb_err = 0; 1556 gspca_dev->sd_desc->get_streamparm(gspca_dev, parm); 1557 return gspca_dev->usb_err; 1558 } 1559 return 0; 1560 } 1561 1562 static int vidioc_s_parm(struct file *filp, void *priv, 1563 struct v4l2_streamparm *parm) 1564 { 1565 struct gspca_dev *gspca_dev = video_drvdata(filp); 1566 int n; 1567 1568 n = parm->parm.capture.readbuffers; 1569 if (n == 0 || n >= GSPCA_MAX_FRAMES) 1570 parm->parm.capture.readbuffers = gspca_dev->nbufread; 1571 else 1572 gspca_dev->nbufread = n; 1573 1574 if (gspca_dev->sd_desc->set_streamparm) { 1575 gspca_dev->usb_err = 0; 1576 gspca_dev->sd_desc->set_streamparm(gspca_dev, parm); 1577 return gspca_dev->usb_err; 1578 } 1579 1580 return 0; 1581 } 1582 1583 static int dev_mmap(struct file *file, struct vm_area_struct *vma) 1584 { 1585 struct gspca_dev *gspca_dev = video_drvdata(file); 1586 struct gspca_frame *frame; 1587 struct page *page; 1588 unsigned long addr, start, size; 1589 int i, ret; 1590 1591 start = vma->vm_start; 1592 size = vma->vm_end - vma->vm_start; 1593 PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size); 1594 1595 if (mutex_lock_interruptible(&gspca_dev->queue_lock)) 1596 return -ERESTARTSYS; 1597 if (gspca_dev->capt_file != file) { 1598 ret = -EINVAL; 1599 goto out; 1600 } 1601 1602 frame = NULL; 1603 for (i = 0; i < gspca_dev->nframes; ++i) { 1604 if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) { 1605 PDEBUG(D_STREAM, "mmap bad memory type"); 1606 break; 1607 } 1608 if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT) 1609 == vma->vm_pgoff) { 1610 frame = &gspca_dev->frame[i]; 1611 break; 1612 } 1613 } 1614 if (frame == NULL) { 1615 PDEBUG(D_STREAM, "mmap no frame buffer found"); 1616 ret = -EINVAL; 1617 goto out; 1618 } 1619 if (size != frame->v4l2_buf.length) { 1620 PDEBUG(D_STREAM, "mmap bad size"); 1621 ret = -EINVAL; 1622 goto out; 1623 } 1624 1625 /* 1626 * - VM_IO marks the area as being a mmaped region for I/O to a 1627 * device. It also prevents the region from being core dumped. 1628 */ 1629 vma->vm_flags |= VM_IO; 1630 1631 addr = (unsigned long) frame->data; 1632 while (size > 0) { 1633 page = vmalloc_to_page((void *) addr); 1634 ret = vm_insert_page(vma, start, page); 1635 if (ret < 0) 1636 goto out; 1637 start += PAGE_SIZE; 1638 addr += PAGE_SIZE; 1639 size -= PAGE_SIZE; 1640 } 1641 1642 vma->vm_ops = &gspca_vm_ops; 1643 vma->vm_private_data = frame; 1644 gspca_vm_open(vma); 1645 ret = 0; 1646 out: 1647 mutex_unlock(&gspca_dev->queue_lock); 1648 return ret; 1649 } 1650 1651 static int frame_ready_nolock(struct gspca_dev *gspca_dev, struct file *file, 1652 enum v4l2_memory memory) 1653 { 1654 if (!gspca_dev->present) 1655 return -ENODEV; 1656 if (gspca_dev->capt_file != file || gspca_dev->memory != memory || 1657 !gspca_dev->streaming) 1658 return -EINVAL; 1659 1660 /* check if a frame is ready */ 1661 return gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i); 1662 } 1663 1664 static int frame_ready(struct gspca_dev *gspca_dev, struct file *file, 1665 enum v4l2_memory memory) 1666 { 1667 int ret; 1668 1669 if (mutex_lock_interruptible(&gspca_dev->queue_lock)) 1670 return -ERESTARTSYS; 1671 ret = frame_ready_nolock(gspca_dev, file, memory); 1672 mutex_unlock(&gspca_dev->queue_lock); 1673 return ret; 1674 } 1675 1676 /* 1677 * dequeue a video buffer 1678 * 1679 * If nonblock_ing is false, block until a buffer is available. 1680 */ 1681 static int vidioc_dqbuf(struct file *file, void *priv, 1682 struct v4l2_buffer *v4l2_buf) 1683 { 1684 struct gspca_dev *gspca_dev = video_drvdata(file); 1685 struct gspca_frame *frame; 1686 int i, j, ret; 1687 1688 PDEBUG(D_FRAM, "dqbuf"); 1689 1690 if (mutex_lock_interruptible(&gspca_dev->queue_lock)) 1691 return -ERESTARTSYS; 1692 1693 for (;;) { 1694 ret = frame_ready_nolock(gspca_dev, file, v4l2_buf->memory); 1695 if (ret < 0) 1696 goto out; 1697 if (ret > 0) 1698 break; 1699 1700 mutex_unlock(&gspca_dev->queue_lock); 1701 1702 if (file->f_flags & O_NONBLOCK) 1703 return -EAGAIN; 1704 1705 /* wait till a frame is ready */ 1706 ret = wait_event_interruptible_timeout(gspca_dev->wq, 1707 frame_ready(gspca_dev, file, v4l2_buf->memory), 1708 msecs_to_jiffies(3000)); 1709 if (ret < 0) 1710 return ret; 1711 if (ret == 0) 1712 return -EIO; 1713 1714 if (mutex_lock_interruptible(&gspca_dev->queue_lock)) 1715 return -ERESTARTSYS; 1716 } 1717 1718 i = gspca_dev->fr_o; 1719 j = gspca_dev->fr_queue[i]; 1720 frame = &gspca_dev->frame[j]; 1721 1722 gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES; 1723 1724 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; 1725 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); 1726 PDEBUG(D_FRAM, "dqbuf %d", j); 1727 ret = 0; 1728 1729 if (gspca_dev->memory == V4L2_MEMORY_USERPTR) { 1730 if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr, 1731 frame->data, 1732 frame->v4l2_buf.bytesused)) { 1733 PERR("dqbuf cp to user failed"); 1734 ret = -EFAULT; 1735 } 1736 } 1737 out: 1738 mutex_unlock(&gspca_dev->queue_lock); 1739 1740 if (ret == 0 && gspca_dev->sd_desc->dq_callback) { 1741 mutex_lock(&gspca_dev->usb_lock); 1742 gspca_dev->usb_err = 0; 1743 if (gspca_dev->present) 1744 gspca_dev->sd_desc->dq_callback(gspca_dev); 1745 mutex_unlock(&gspca_dev->usb_lock); 1746 } 1747 1748 return ret; 1749 } 1750 1751 /* 1752 * queue a video buffer 1753 * 1754 * Attempting to queue a buffer that has already been 1755 * queued will return -EINVAL. 1756 */ 1757 static int vidioc_qbuf(struct file *file, void *priv, 1758 struct v4l2_buffer *v4l2_buf) 1759 { 1760 struct gspca_dev *gspca_dev = video_drvdata(file); 1761 struct gspca_frame *frame; 1762 int i, index, ret; 1763 1764 PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index); 1765 1766 if (mutex_lock_interruptible(&gspca_dev->queue_lock)) 1767 return -ERESTARTSYS; 1768 1769 index = v4l2_buf->index; 1770 if ((unsigned) index >= gspca_dev->nframes) { 1771 PDEBUG(D_FRAM, 1772 "qbuf idx %d >= %d", index, gspca_dev->nframes); 1773 ret = -EINVAL; 1774 goto out; 1775 } 1776 if (v4l2_buf->memory != gspca_dev->memory) { 1777 PDEBUG(D_FRAM, "qbuf bad memory type"); 1778 ret = -EINVAL; 1779 goto out; 1780 } 1781 1782 frame = &gspca_dev->frame[index]; 1783 if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) { 1784 PDEBUG(D_FRAM, "qbuf bad state"); 1785 ret = -EINVAL; 1786 goto out; 1787 } 1788 1789 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED; 1790 1791 if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) { 1792 frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr; 1793 frame->v4l2_buf.length = v4l2_buf->length; 1794 } 1795 1796 /* put the buffer in the 'queued' queue */ 1797 i = atomic_read(&gspca_dev->fr_q); 1798 gspca_dev->fr_queue[i] = index; 1799 atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES); 1800 1801 v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; 1802 v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE; 1803 ret = 0; 1804 out: 1805 mutex_unlock(&gspca_dev->queue_lock); 1806 return ret; 1807 } 1808 1809 /* 1810 * allocate the resources for read() 1811 */ 1812 static int read_alloc(struct gspca_dev *gspca_dev, 1813 struct file *file) 1814 { 1815 struct v4l2_buffer v4l2_buf; 1816 int i, ret; 1817 1818 PDEBUG(D_STREAM, "read alloc"); 1819 1820 if (mutex_lock_interruptible(&gspca_dev->usb_lock)) 1821 return -ERESTARTSYS; 1822 1823 if (gspca_dev->nframes == 0) { 1824 struct v4l2_requestbuffers rb; 1825 1826 memset(&rb, 0, sizeof rb); 1827 rb.count = gspca_dev->nbufread; 1828 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1829 rb.memory = GSPCA_MEMORY_READ; 1830 ret = vidioc_reqbufs(file, gspca_dev, &rb); 1831 if (ret != 0) { 1832 PDEBUG(D_STREAM, "read reqbuf err %d", ret); 1833 goto out; 1834 } 1835 memset(&v4l2_buf, 0, sizeof v4l2_buf); 1836 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1837 v4l2_buf.memory = GSPCA_MEMORY_READ; 1838 for (i = 0; i < gspca_dev->nbufread; i++) { 1839 v4l2_buf.index = i; 1840 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); 1841 if (ret != 0) { 1842 PDEBUG(D_STREAM, "read qbuf err: %d", ret); 1843 goto out; 1844 } 1845 } 1846 } 1847 1848 /* start streaming */ 1849 ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); 1850 if (ret != 0) 1851 PDEBUG(D_STREAM, "read streamon err %d", ret); 1852 out: 1853 mutex_unlock(&gspca_dev->usb_lock); 1854 return ret; 1855 } 1856 1857 static unsigned int dev_poll(struct file *file, poll_table *wait) 1858 { 1859 struct gspca_dev *gspca_dev = video_drvdata(file); 1860 unsigned long req_events = poll_requested_events(wait); 1861 int ret = 0; 1862 1863 PDEBUG(D_FRAM, "poll"); 1864 1865 if (req_events & POLLPRI) 1866 ret |= v4l2_ctrl_poll(file, wait); 1867 1868 if (req_events & (POLLIN | POLLRDNORM)) { 1869 /* if reqbufs is not done, the user would use read() */ 1870 if (gspca_dev->memory == GSPCA_MEMORY_NO) { 1871 if (read_alloc(gspca_dev, file) != 0) { 1872 ret |= POLLERR; 1873 goto out; 1874 } 1875 } 1876 1877 poll_wait(file, &gspca_dev->wq, wait); 1878 1879 /* check if an image has been received */ 1880 if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) { 1881 ret |= POLLERR; 1882 goto out; 1883 } 1884 if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i)) 1885 ret |= POLLIN | POLLRDNORM; 1886 mutex_unlock(&gspca_dev->queue_lock); 1887 } 1888 1889 out: 1890 if (!gspca_dev->present) 1891 ret |= POLLHUP; 1892 1893 return ret; 1894 } 1895 1896 static ssize_t dev_read(struct file *file, char __user *data, 1897 size_t count, loff_t *ppos) 1898 { 1899 struct gspca_dev *gspca_dev = video_drvdata(file); 1900 struct gspca_frame *frame; 1901 struct v4l2_buffer v4l2_buf; 1902 struct timeval timestamp; 1903 int n, ret, ret2; 1904 1905 PDEBUG(D_FRAM, "read (%zd)", count); 1906 if (gspca_dev->memory == GSPCA_MEMORY_NO) { /* first time ? */ 1907 ret = read_alloc(gspca_dev, file); 1908 if (ret != 0) 1909 return ret; 1910 } 1911 1912 /* get a frame */ 1913 timestamp = ktime_to_timeval(ktime_get()); 1914 timestamp.tv_sec--; 1915 n = 2; 1916 for (;;) { 1917 memset(&v4l2_buf, 0, sizeof v4l2_buf); 1918 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1919 v4l2_buf.memory = GSPCA_MEMORY_READ; 1920 ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf); 1921 if (ret != 0) { 1922 PDEBUG(D_STREAM, "read dqbuf err %d", ret); 1923 return ret; 1924 } 1925 1926 /* if the process slept for more than 1 second, 1927 * get a newer frame */ 1928 frame = &gspca_dev->frame[v4l2_buf.index]; 1929 if (--n < 0) 1930 break; /* avoid infinite loop */ 1931 if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec) 1932 break; 1933 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); 1934 if (ret != 0) { 1935 PDEBUG(D_STREAM, "read qbuf err %d", ret); 1936 return ret; 1937 } 1938 } 1939 1940 /* copy the frame */ 1941 if (count > frame->v4l2_buf.bytesused) 1942 count = frame->v4l2_buf.bytesused; 1943 ret = copy_to_user(data, frame->data, count); 1944 if (ret != 0) { 1945 PERR("read cp to user lack %d / %zd", ret, count); 1946 ret = -EFAULT; 1947 goto out; 1948 } 1949 ret = count; 1950 out: 1951 /* in each case, requeue the buffer */ 1952 ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf); 1953 if (ret2 != 0) 1954 return ret2; 1955 return ret; 1956 } 1957 1958 static struct v4l2_file_operations dev_fops = { 1959 .owner = THIS_MODULE, 1960 .open = dev_open, 1961 .release = dev_close, 1962 .read = dev_read, 1963 .mmap = dev_mmap, 1964 .unlocked_ioctl = video_ioctl2, 1965 .poll = dev_poll, 1966 }; 1967 1968 static const struct v4l2_ioctl_ops dev_ioctl_ops = { 1969 .vidioc_querycap = vidioc_querycap, 1970 .vidioc_dqbuf = vidioc_dqbuf, 1971 .vidioc_qbuf = vidioc_qbuf, 1972 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 1973 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 1974 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 1975 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 1976 .vidioc_streamon = vidioc_streamon, 1977 .vidioc_enum_input = vidioc_enum_input, 1978 .vidioc_g_input = vidioc_g_input, 1979 .vidioc_s_input = vidioc_s_input, 1980 .vidioc_reqbufs = vidioc_reqbufs, 1981 .vidioc_querybuf = vidioc_querybuf, 1982 .vidioc_streamoff = vidioc_streamoff, 1983 .vidioc_g_jpegcomp = vidioc_g_jpegcomp, 1984 .vidioc_s_jpegcomp = vidioc_s_jpegcomp, 1985 .vidioc_g_parm = vidioc_g_parm, 1986 .vidioc_s_parm = vidioc_s_parm, 1987 .vidioc_enum_framesizes = vidioc_enum_framesizes, 1988 .vidioc_enum_frameintervals = vidioc_enum_frameintervals, 1989 #ifdef CONFIG_VIDEO_ADV_DEBUG 1990 .vidioc_g_chip_info = vidioc_g_chip_info, 1991 .vidioc_g_register = vidioc_g_register, 1992 .vidioc_s_register = vidioc_s_register, 1993 #endif 1994 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 1995 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1996 }; 1997 1998 static const struct video_device gspca_template = { 1999 .name = "gspca main driver", 2000 .fops = &dev_fops, 2001 .ioctl_ops = &dev_ioctl_ops, 2002 .release = video_device_release_empty, /* We use v4l2_dev.release */ 2003 }; 2004 2005 /* 2006 * probe and create a new gspca device 2007 * 2008 * This function must be called by the sub-driver when it is 2009 * called for probing a new device. 2010 */ 2011 int gspca_dev_probe2(struct usb_interface *intf, 2012 const struct usb_device_id *id, 2013 const struct sd_desc *sd_desc, 2014 int dev_size, 2015 struct module *module) 2016 { 2017 struct gspca_dev *gspca_dev; 2018 struct usb_device *dev = interface_to_usbdev(intf); 2019 int ret; 2020 2021 pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n", 2022 sd_desc->name, id->idVendor, id->idProduct); 2023 2024 /* create the device */ 2025 if (dev_size < sizeof *gspca_dev) 2026 dev_size = sizeof *gspca_dev; 2027 gspca_dev = kzalloc(dev_size, GFP_KERNEL); 2028 if (!gspca_dev) { 2029 pr_err("couldn't kzalloc gspca struct\n"); 2030 return -ENOMEM; 2031 } 2032 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL); 2033 if (!gspca_dev->usb_buf) { 2034 pr_err("out of memory\n"); 2035 ret = -ENOMEM; 2036 goto out; 2037 } 2038 gspca_dev->dev = dev; 2039 gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber; 2040 gspca_dev->xfer_ep = -1; 2041 2042 /* check if any audio device */ 2043 if (dev->actconfig->desc.bNumInterfaces != 1) { 2044 int i; 2045 struct usb_interface *intf2; 2046 2047 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { 2048 intf2 = dev->actconfig->interface[i]; 2049 if (intf2 != NULL 2050 && intf2->altsetting != NULL 2051 && intf2->altsetting->desc.bInterfaceClass == 2052 USB_CLASS_AUDIO) { 2053 gspca_dev->audio = 1; 2054 break; 2055 } 2056 } 2057 } 2058 2059 gspca_dev->v4l2_dev.release = gspca_release; 2060 ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev); 2061 if (ret) 2062 goto out; 2063 gspca_dev->sd_desc = sd_desc; 2064 gspca_dev->nbufread = 2; 2065 gspca_dev->empty_packet = -1; /* don't check the empty packets */ 2066 gspca_dev->vdev = gspca_template; 2067 gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev; 2068 video_set_drvdata(&gspca_dev->vdev, gspca_dev); 2069 gspca_dev->module = module; 2070 gspca_dev->present = 1; 2071 2072 mutex_init(&gspca_dev->usb_lock); 2073 gspca_dev->vdev.lock = &gspca_dev->usb_lock; 2074 mutex_init(&gspca_dev->queue_lock); 2075 init_waitqueue_head(&gspca_dev->wq); 2076 2077 /* configure the subdriver and initialize the USB device */ 2078 ret = sd_desc->config(gspca_dev, id); 2079 if (ret < 0) 2080 goto out; 2081 ret = sd_desc->init(gspca_dev); 2082 if (ret < 0) 2083 goto out; 2084 if (sd_desc->init_controls) 2085 ret = sd_desc->init_controls(gspca_dev); 2086 if (ret < 0) 2087 goto out; 2088 gspca_set_default_mode(gspca_dev); 2089 2090 ret = gspca_input_connect(gspca_dev); 2091 if (ret) 2092 goto out; 2093 2094 /* 2095 * Don't take usb_lock for these ioctls. This improves latency if 2096 * usb_lock is taken for a long time, e.g. when changing a control 2097 * value, and a new frame is ready to be dequeued. 2098 */ 2099 v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_DQBUF); 2100 v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QBUF); 2101 v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QUERYBUF); 2102 #ifdef CONFIG_VIDEO_ADV_DEBUG 2103 if (!gspca_dev->sd_desc->get_register) 2104 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_REGISTER); 2105 if (!gspca_dev->sd_desc->set_register) 2106 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_S_REGISTER); 2107 #endif 2108 if (!gspca_dev->sd_desc->get_jcomp) 2109 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_G_JPEGCOMP); 2110 if (!gspca_dev->sd_desc->set_jcomp) 2111 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_S_JPEGCOMP); 2112 2113 /* init video stuff */ 2114 ret = video_register_device(&gspca_dev->vdev, 2115 VFL_TYPE_GRABBER, 2116 -1); 2117 if (ret < 0) { 2118 pr_err("video_register_device err %d\n", ret); 2119 goto out; 2120 } 2121 2122 usb_set_intfdata(intf, gspca_dev); 2123 PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev)); 2124 2125 gspca_input_create_urb(gspca_dev); 2126 2127 return 0; 2128 out: 2129 #if IS_ENABLED(CONFIG_INPUT) 2130 if (gspca_dev->input_dev) 2131 input_unregister_device(gspca_dev->input_dev); 2132 #endif 2133 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler); 2134 kfree(gspca_dev->usb_buf); 2135 kfree(gspca_dev); 2136 return ret; 2137 } 2138 EXPORT_SYMBOL(gspca_dev_probe2); 2139 2140 /* same function as the previous one, but check the interface */ 2141 int gspca_dev_probe(struct usb_interface *intf, 2142 const struct usb_device_id *id, 2143 const struct sd_desc *sd_desc, 2144 int dev_size, 2145 struct module *module) 2146 { 2147 struct usb_device *dev = interface_to_usbdev(intf); 2148 2149 /* we don't handle multi-config cameras */ 2150 if (dev->descriptor.bNumConfigurations != 1) { 2151 pr_err("%04x:%04x too many config\n", 2152 id->idVendor, id->idProduct); 2153 return -ENODEV; 2154 } 2155 2156 /* the USB video interface must be the first one */ 2157 if (dev->actconfig->desc.bNumInterfaces != 1 2158 && intf->cur_altsetting->desc.bInterfaceNumber != 0) 2159 return -ENODEV; 2160 2161 return gspca_dev_probe2(intf, id, sd_desc, dev_size, module); 2162 } 2163 EXPORT_SYMBOL(gspca_dev_probe); 2164 2165 /* 2166 * USB disconnection 2167 * 2168 * This function must be called by the sub-driver 2169 * when the device disconnects, after the specific resources are freed. 2170 */ 2171 void gspca_disconnect(struct usb_interface *intf) 2172 { 2173 struct gspca_dev *gspca_dev = usb_get_intfdata(intf); 2174 #if IS_ENABLED(CONFIG_INPUT) 2175 struct input_dev *input_dev; 2176 #endif 2177 2178 PDEBUG(D_PROBE, "%s disconnect", 2179 video_device_node_name(&gspca_dev->vdev)); 2180 2181 mutex_lock(&gspca_dev->usb_lock); 2182 2183 gspca_dev->present = 0; 2184 destroy_urbs(gspca_dev); 2185 2186 #if IS_ENABLED(CONFIG_INPUT) 2187 gspca_input_destroy_urb(gspca_dev); 2188 input_dev = gspca_dev->input_dev; 2189 if (input_dev) { 2190 gspca_dev->input_dev = NULL; 2191 input_unregister_device(input_dev); 2192 } 2193 #endif 2194 /* Free subdriver's streaming resources / stop sd workqueue(s) */ 2195 if (gspca_dev->sd_desc->stop0 && gspca_dev->streaming) 2196 gspca_dev->sd_desc->stop0(gspca_dev); 2197 gspca_dev->streaming = 0; 2198 gspca_dev->dev = NULL; 2199 wake_up_interruptible(&gspca_dev->wq); 2200 2201 v4l2_device_disconnect(&gspca_dev->v4l2_dev); 2202 video_unregister_device(&gspca_dev->vdev); 2203 2204 mutex_unlock(&gspca_dev->usb_lock); 2205 2206 /* (this will call gspca_release() immediately or on last close) */ 2207 v4l2_device_put(&gspca_dev->v4l2_dev); 2208 } 2209 EXPORT_SYMBOL(gspca_disconnect); 2210 2211 #ifdef CONFIG_PM 2212 int gspca_suspend(struct usb_interface *intf, pm_message_t message) 2213 { 2214 struct gspca_dev *gspca_dev = usb_get_intfdata(intf); 2215 2216 gspca_input_destroy_urb(gspca_dev); 2217 2218 if (!gspca_dev->streaming) 2219 return 0; 2220 2221 mutex_lock(&gspca_dev->usb_lock); 2222 gspca_dev->frozen = 1; /* avoid urb error messages */ 2223 gspca_dev->usb_err = 0; 2224 if (gspca_dev->sd_desc->stopN) 2225 gspca_dev->sd_desc->stopN(gspca_dev); 2226 destroy_urbs(gspca_dev); 2227 gspca_set_alt0(gspca_dev); 2228 if (gspca_dev->sd_desc->stop0) 2229 gspca_dev->sd_desc->stop0(gspca_dev); 2230 mutex_unlock(&gspca_dev->usb_lock); 2231 2232 return 0; 2233 } 2234 EXPORT_SYMBOL(gspca_suspend); 2235 2236 int gspca_resume(struct usb_interface *intf) 2237 { 2238 struct gspca_dev *gspca_dev = usb_get_intfdata(intf); 2239 int streaming, ret = 0; 2240 2241 mutex_lock(&gspca_dev->usb_lock); 2242 gspca_dev->frozen = 0; 2243 gspca_dev->usb_err = 0; 2244 gspca_dev->sd_desc->init(gspca_dev); 2245 /* 2246 * Most subdrivers send all ctrl values on sd_start and thus 2247 * only write to the device registers on s_ctrl when streaming -> 2248 * Clear streaming to avoid setting all ctrls twice. 2249 */ 2250 streaming = gspca_dev->streaming; 2251 gspca_dev->streaming = 0; 2252 if (streaming) 2253 ret = gspca_init_transfer(gspca_dev); 2254 else 2255 gspca_input_create_urb(gspca_dev); 2256 mutex_unlock(&gspca_dev->usb_lock); 2257 2258 return ret; 2259 } 2260 EXPORT_SYMBOL(gspca_resume); 2261 #endif 2262 2263 /* -- module insert / remove -- */ 2264 static int __init gspca_init(void) 2265 { 2266 pr_info("v" GSPCA_VERSION " registered\n"); 2267 return 0; 2268 } 2269 static void __exit gspca_exit(void) 2270 { 2271 } 2272 2273 module_init(gspca_init); 2274 module_exit(gspca_exit); 2275 2276 module_param_named(debug, gspca_debug, int, 0644); 2277 MODULE_PARM_DESC(debug, 2278 "1:probe 2:config 3:stream 4:frame 5:packet 6:usbi 7:usbo"); 2279