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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 | /* * copyright (C) 1999/2000 by Henning Zabel <henning@uni-paderborn.de> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* * USB-Kernel Driver for the Mustek MDC800 Digital Camera * (c) 1999/2000 Henning Zabel <henning@uni-paderborn.de> * * * The driver brings the USB functions of the MDC800 to Linux. * To use the Camera you must support the USB Protocoll of the camera * to the Kernel Node. * The Driver uses a misc device Node. Create it with : * mknod /dev/mustek c 180 32 * * The driver supports only one camera. * * version 0.7.3 * bugfix : The mdc800->state field gets set to READY after the * the diconnect function sets it to NOT_CONNECTED. This makes the * driver running like the camera is connected and causes some * hang ups. * * version 0.7.1 * MOD_INC and MOD_DEC are changed in usb_probe to prevent load/unload * problems when compiled as Module. * (04/04/2000) * * The mdc800 driver gets assigned the USB Minor 32-47. The Registration * was updated to use these values. * (26/03/2000) * * The Init und Exit Module Function are updated. * (01/03/2000) * * version 0.7.0 * Rewrite of the driver : The driver now uses URB's. The old stuff * has been removed. * * version 0.6.0 * Rewrite of this driver: The Emulation of the rs232 protocoll * has been removed from the driver. A special executeCommand function * for this driver is included to gphoto. * The driver supports two kind of communication to bulk endpoints. * Either with the dev->bus->ops->bulk... or with callback function. * (09/11/1999) * * version 0.5.0: * first Version that gets a version number. Most of the needed * functions work. * (20/10/1999) */ #include <linux/version.h> #include <linux/sched.h> #include <linux/signal.h> #include <linux/spinlock.h> #include <linux/errno.h> #include <linux/random.h> #include <linux/poll.h> #include <linux/init.h> #include <linux/malloc.h> #include <linux/module.h> #include <linux/usb.h> #define VERSION "0.7.3" #define RELEASE_DATE "(24/04/2000)" /* Vendor and Product Information */ #define MDC800_VENDOR_ID 0x055f #define MDC800_PRODUCT_ID 0xa800 /* Timeouts (msec) */ #define TO_DOWNLOAD_GET_READY 1500 #define TO_DOWNLOAD_GET_BUSY 1500 #define TO_WRITE_GET_READY 1000 #define TO_DEFAULT_COMMAND 5000 #define TO_READ_FROM_IRQ TO_DEFAULT_COMMAND #define TO_GET_READY TO_DEFAULT_COMMAND /* Minor Number of the device (create with mknod /dev/mustek c 180 32) */ #define MDC800_DEVICE_MINOR_BASE 32 /************************************************************************** Data and structs ***************************************************************************/ typedef enum { NOT_CONNECTED, READY, WORKING, DOWNLOAD } mdc800_state; /* Data for the driver */ struct mdc800_data { struct usb_device * dev; // Device Data mdc800_state state; unsigned int endpoint [4]; purb_t irq_urb; wait_queue_head_t irq_wait; char* irq_urb_buffer; int camera_busy; // is camera busy ? int camera_request_ready; // Status to synchronize with irq char camera_response [8]; // last Bytes send after busy purb_t write_urb; char* write_urb_buffer; wait_queue_head_t write_wait; purb_t download_urb; char* download_urb_buffer; wait_queue_head_t download_wait; int download_left; // Bytes left to download ? /* Device Data */ char out [64]; // Answer Buffer int out_ptr; // Index to the first not readen byte int out_count; // Bytes in the buffer int open; // Camera device open ? int rw_lock; // Block read <-> write char in [8]; // Command Input Buffer int in_count; int pic_index; // Cache for the Imagesize (-1 for nothing cached ) int pic_len; }; /* Specification of the Endpoints */ static struct usb_endpoint_descriptor mdc800_ed [4] = { { 0,0, 0x01, 0x02, 8, 0,0,0 }, { 0,0, 0x82, 0x03, 8, 0,0,0 }, { 0,0, 0x03, 0x02, 64, 0,0,0 }, { 0,0, 0x84, 0x02, 64, 0,0,0 } }; /* The Variable used by the driver */ static struct mdc800_data* mdc800=0; /*************************************************************************** The USB Part of the driver ****************************************************************************/ static int mdc800_endpoint_equals (struct usb_endpoint_descriptor *a,struct usb_endpoint_descriptor *b) { return ( ( a->bEndpointAddress == b->bEndpointAddress ) && ( a->bmAttributes == b->bmAttributes ) && ( a->wMaxPacketSize == b->wMaxPacketSize ) ); } /* * Checks wether the camera responds busy */ static int mdc800_isBusy (char* ch) { int i=0; while (i<8) { if (ch [i] != (char)0x99) return 0; i++; } return 1; } /* * Checks wether the Camera is ready */ static int mdc800_isReady (char *ch) { int i=0; while (i<8) { if (ch [i] != (char)0xbb) return 0; i++; } return 1; } /* * USB IRQ Handler for InputLine */ static void mdc800_usb_irq (struct urb *urb) { int data_received=0, wake_up; unsigned char* b=urb->transfer_buffer; struct mdc800_data* mdc800=urb->context; if (urb->status >= 0) { //dbg ("%i %i %i %i %i %i %i %i \n",b[0],b[1],b[2],b[3],b[4],b[5],b[6],b[7]); if (mdc800_isBusy (b)) { if (!mdc800->camera_busy) { mdc800->camera_busy=1; dbg ("gets busy"); } } else { if (mdc800->camera_busy && mdc800_isReady (b)) { mdc800->camera_busy=0; dbg ("gets ready"); } } if (!(mdc800_isBusy (b) || mdc800_isReady (b))) { /* Store Data in camera_answer field */ dbg ("%i %i %i %i %i %i %i %i ",b[0],b[1],b[2],b[3],b[4],b[5],b[6],b[7]); memcpy (mdc800->camera_response,b,8); data_received=1; } } wake_up= ( mdc800->camera_request_ready > 0 ) && ( ((mdc800->camera_request_ready == 1) && (!mdc800->camera_busy)) || ((mdc800->camera_request_ready == 2) && data_received) || ((mdc800->camera_request_ready == 3) && (mdc800->camera_busy)) || (urb->status < 0) ); if (wake_up) { mdc800->camera_request_ready=0; wake_up_interruptible (&mdc800->irq_wait); } } /* * Waits a while until the irq responds that camera is ready * * mode : 0: Wait for camera gets ready * 1: Wait for receiving data * 2: Wait for camera gets busy * * msec: Time to wait */ static int mdc800_usb_waitForIRQ (int mode, int msec) { mdc800->camera_request_ready=1+mode; interruptible_sleep_on_timeout (&mdc800->irq_wait, msec*HZ/1000); if (mdc800->camera_request_ready>0) { mdc800->camera_request_ready=0; err ("timeout waiting for camera."); return -1; } if (mdc800->state == NOT_CONNECTED) { warn ("Camera gets disconnected during waiting for irq."); mdc800->camera_request_ready=0; return -2; } return 0; } /* * The write_urb callback function */ static void mdc800_usb_write_notify (struct urb *urb) { struct mdc800_data* mdc800=urb->context; if (urb->status != 0) { err ("writing command fails (status=%i)", urb->status); } else { mdc800->state=READY; } wake_up_interruptible (&mdc800->write_wait); } /* * The download_urb callback function */ static void mdc800_usb_download_notify (struct urb *urb) { struct mdc800_data* mdc800=urb->context; if (urb->status == 0) { /* Fill output buffer with these data */ memcpy (mdc800->out, urb->transfer_buffer, 64); mdc800->out_count=64; mdc800->out_ptr=0; mdc800->download_left-=64; if (mdc800->download_left == 0) { mdc800->state=READY; } } else { err ("request bytes fails (status:%i)", urb->status); } wake_up_interruptible (&mdc800->download_wait); } /*************************************************************************** Probing for the Camera ***************************************************************************/ static struct usb_driver mdc800_usb_driver; /* * Callback to search the Mustek MDC800 on the USB Bus */ static void* mdc800_usb_probe (struct usb_device *dev ,unsigned int ifnum ) { int i,j; struct usb_interface_descriptor *intf_desc; int irq_interval=0; dbg ("(mdc800_usb_probe) called."); if (dev->descriptor.idVendor != MDC800_VENDOR_ID) return 0; if (dev->descriptor.idProduct != MDC800_PRODUCT_ID) return 0; if (mdc800->dev != 0) { warn ("only one Mustek MDC800 is supported."); return 0; } if (dev->descriptor.bNumConfigurations != 1) { err ("probe fails -> wrong Number of Configuration"); return 0; } intf_desc=&dev->actconfig->interface[ifnum].altsetting[0]; if ( ( intf_desc->bInterfaceClass != 0xff ) || ( intf_desc->bInterfaceSubClass != 0 ) || ( intf_desc->bInterfaceProtocol != 0 ) || ( intf_desc->bNumEndpoints != 4) ) { err ("probe fails -> wrong Interface"); return 0; } /* Check the Endpoints */ for (i=0; i<4; i++) { mdc800->endpoint[i]=-1; for (j=0; j<4; j++) { if (mdc800_endpoint_equals (&intf_desc->endpoint [j],&mdc800_ed [i])) { mdc800->endpoint[i]=intf_desc->endpoint [j].bEndpointAddress ; if (i==1) { irq_interval=intf_desc->endpoint [j].bInterval; } continue; } } if (mdc800->endpoint[i] == -1) { err ("probe fails -> Wrong Endpoints."); return 0; } } usb_driver_claim_interface (&mdc800_usb_driver, &dev->actconfig->interface[ifnum], mdc800); if (usb_set_interface (dev, ifnum, 0) < 0) { err ("MDC800 Configuration fails."); return 0; } info ("Found Mustek MDC800 on USB."); mdc800->dev=dev; mdc800->state=READY; mdc800->open=0; mdc800->rw_lock=0; /* Setup URB Structs */ FILL_INT_URB ( mdc800->irq_urb, mdc800->dev, usb_rcvintpipe (mdc800->dev,mdc800->endpoint [1]), mdc800->irq_urb_buffer, 8, mdc800_usb_irq, mdc800, irq_interval ); FILL_BULK_URB ( mdc800->write_urb, mdc800->dev, usb_sndbulkpipe (mdc800->dev, mdc800->endpoint[0]), mdc800->write_urb_buffer, 8, mdc800_usb_write_notify, mdc800 ); FILL_BULK_URB ( mdc800->download_urb, mdc800->dev, usb_rcvbulkpipe (mdc800->dev, mdc800->endpoint [3]), mdc800->download_urb_buffer, 64, mdc800_usb_download_notify, mdc800 ); return mdc800; } /* * Disconnect USB device (maybe the MDC800) */ static void mdc800_usb_disconnect (struct usb_device *dev,void* ptr) { struct mdc800_data* mdc800=(struct mdc800_data*) ptr; dbg ("(mdc800_usb_disconnect) called"); if (mdc800->state == NOT_CONNECTED) return; mdc800->state=NOT_CONNECTED; usb_unlink_urb (mdc800->irq_urb); usb_unlink_urb (mdc800->write_urb); usb_unlink_urb (mdc800->download_urb); usb_driver_release_interface (&mdc800_usb_driver, &dev->actconfig->interface[1]); mdc800->dev=0; info ("Mustek MDC800 disconnected from USB."); } /*************************************************************************** The Misc device Part (file_operations) ****************************************************************************/ /* * This Function calc the Answersize for a command. */ static int mdc800_getAnswerSize (char command) { switch ((unsigned char) command) { case 0x2a: case 0x49: case 0x51: case 0x0d: case 0x20: case 0x07: case 0x01: case 0x25: case 0x00: return 8; case 0x05: case 0x3e: return mdc800->pic_len; case 0x09: return 4096; default: return 0; } } /* * Init the device: (1) alloc mem (2) Increase MOD Count .. */ static int mdc800_device_open (struct inode* inode, struct file *file) { int retval=0; MOD_INC_USE_COUNT; if (mdc800->state == NOT_CONNECTED) { MOD_DEC_USE_COUNT; return -EBUSY; } if (mdc800->open) { MOD_DEC_USE_COUNT; return -EBUSY; } mdc800->rw_lock=0; mdc800->in_count=0; mdc800->out_count=0; mdc800->out_ptr=0; mdc800->pic_index=0; mdc800->pic_len=-1; mdc800->download_left=0; mdc800->camera_busy=0; mdc800->camera_request_ready=0; retval=0; if (usb_submit_urb (mdc800->irq_urb)) { err ("request USB irq fails (submit_retval=%i urb_status=%i).",retval, mdc800->irq_urb->status); MOD_DEC_USE_COUNT; return -EIO; } mdc800->open=1; dbg ("Mustek MDC800 device opened."); return 0; } /* * Close the Camera and release Memory */ static int mdc800_device_release (struct inode* inode, struct file *file) { int retval=0; dbg ("Mustek MDC800 device closed."); if (mdc800->open && (mdc800->state != NOT_CONNECTED)) { mdc800->open=0; usb_unlink_urb (mdc800->irq_urb); usb_unlink_urb (mdc800->write_urb); usb_unlink_urb (mdc800->download_urb); } else { retval=-EIO; } MOD_DEC_USE_COUNT; return retval; } /* * The Device read callback Function */ static ssize_t mdc800_device_read (struct file *file, char *buf, size_t len, loff_t *pos) { int left=len, sts=len; /* single transfer size */ char* ptr=buf; if (mdc800->state == NOT_CONNECTED) return -EBUSY; if (mdc800->state == WORKING) { warn ("Illegal State \"working\" reached during read ?!"); return -EBUSY; } if (!mdc800->open || mdc800->rw_lock) return -EBUSY; mdc800->rw_lock=1; while (left) { if (signal_pending (current)) { mdc800->rw_lock=0; return -EINTR; } sts=left > (mdc800->out_count-mdc800->out_ptr)?mdc800->out_count-mdc800->out_ptr:left; if (sts <= 0) { /* Too less Data in buffer */ if (mdc800->state == DOWNLOAD) { mdc800->out_count=0; mdc800->out_ptr=0; /* Download -> Request new bytes */ if (usb_submit_urb (mdc800->download_urb)) { err ("Can't submit download urb (status=%i)",mdc800->download_urb->status); mdc800->rw_lock=0; return len-left; } interruptible_sleep_on_timeout (&mdc800->download_wait, TO_DOWNLOAD_GET_READY*HZ/1000); if (mdc800->download_urb->status != 0) { err ("request download-bytes fails (status=%i)",mdc800->download_urb->status); mdc800->rw_lock=0; return len-left; } } else { /* No more bytes -> that's an error*/ mdc800->rw_lock=0; return -EIO; } } else { /* memcpy Bytes */ memcpy (ptr, &mdc800->out [mdc800->out_ptr], sts); ptr+=sts; left-=sts; mdc800->out_ptr+=sts; } } mdc800->rw_lock=0; return len-left; } /* * The Device write callback Function * If a 8Byte Command is received, it will be send to the camera. * After this the driver initiates the request for the answer or * just waits until the camera becomes ready. */ static ssize_t mdc800_device_write (struct file *file, const char *buf, size_t len, loff_t *pos) { int i=0; if (mdc800->state != READY) return -EBUSY; if (!mdc800->open || mdc800->rw_lock) return -EBUSY; mdc800->rw_lock=1; while (i<len) { if (signal_pending (current)) { mdc800->rw_lock=0; return -EINTR; } /* check for command start */ if (buf [i] == (char) 0x55) { mdc800->in_count=0; mdc800->out_count=0; mdc800->out_ptr=0; mdc800->download_left=0; } /* save command byte */ if (mdc800->in_count < 8) { mdc800->in[mdc800->in_count]=buf[i]; mdc800->in_count++; } else { err ("Command is to long !\n"); mdc800->rw_lock=0; return -EIO; } /* Command Buffer full ? -> send it to camera */ if (mdc800->in_count == 8) { int answersize; if (mdc800_usb_waitForIRQ (0,TO_GET_READY)) { err ("Camera didn't get ready.\n"); mdc800->rw_lock=0; return -EIO; } answersize=mdc800_getAnswerSize (mdc800->in[1]); mdc800->state=WORKING; memcpy (mdc800->write_urb->transfer_buffer, mdc800->in,8); if (usb_submit_urb (mdc800->write_urb)) { err ("submitting write urb fails (status=%i)", mdc800->write_urb->status); mdc800->rw_lock=0; return -EIO; } interruptible_sleep_on_timeout (&mdc800->write_wait, TO_WRITE_GET_READY*HZ/1000); if (mdc800->state == WORKING) { usb_unlink_urb (mdc800->write_urb); mdc800->rw_lock=0; return -EIO; } switch ((unsigned char) mdc800->in[1]) { case 0x05: /* Download Image */ case 0x3e: /* Take shot in Fine Mode (WCam Mode) */ if (mdc800->pic_len < 0) { err ("call 0x07 before 0x05,0x3e"); mdc800->state=READY; mdc800->rw_lock=0; return -EIO; } mdc800->pic_len=-1; case 0x09: /* Download Thumbnail */ mdc800->download_left=answersize+64; mdc800->state=DOWNLOAD; mdc800_usb_waitForIRQ (0,TO_DOWNLOAD_GET_BUSY); break; default: if (answersize) { if (mdc800_usb_waitForIRQ (1,TO_READ_FROM_IRQ)) { err ("requesting answer from irq fails"); mdc800->rw_lock=0; return -EIO; } /* Write dummy data, (this is ugly but part of the USB Protokoll */ /* if you use endpoint 1 as bulk and not as irq */ memcpy (mdc800->out, mdc800->camera_response,8); /* This is the interpreted answer */ memcpy (&mdc800->out[8], mdc800->camera_response,8); mdc800->out_ptr=0; mdc800->out_count=16; /* Cache the Imagesize, if command was getImageSize */ if (mdc800->in [1] == (char) 0x07) { mdc800->pic_len=(int) 65536*(unsigned char) mdc800->camera_response[0]+256*(unsigned char) mdc800->camera_response[1]+(unsigned char) mdc800->camera_response[2]; dbg ("cached imagesize = %i",mdc800->pic_len); } } else { if (mdc800_usb_waitForIRQ (0,TO_DEFAULT_COMMAND)) { err ("Command Timeout."); mdc800->rw_lock=0; return -EIO; } } mdc800->state=READY; break; } } i++; } mdc800->rw_lock=0; return i; } /*************************************************************************** Init and Cleanup this driver (Structs and types) ****************************************************************************/ /* File Operations of this drivers */ static struct file_operations mdc800_device_ops = { read: mdc800_device_read, write: mdc800_device_write, open: mdc800_device_open, release: mdc800_device_release, }; /* * USB Driver Struct for this device */ static struct usb_driver mdc800_usb_driver = { "mdc800", mdc800_usb_probe, mdc800_usb_disconnect, { 0,0 }, &mdc800_device_ops, MDC800_DEVICE_MINOR_BASE }; /************************************************************************ Init and Cleanup this driver (Main Functions) *************************************************************************/ #define try(A) if ((A) == 0) goto cleanup_on_fail; #define try_free_mem(A) if (A != 0) { kfree (A); A=0; } #define try_free_urb(A) if (A != 0) { usb_free_urb (A); A=0; } int __init usb_mdc800_init (void) { /* Allocate Memory */ try (mdc800=kmalloc (sizeof (struct mdc800_data), GFP_KERNEL)); mdc800->dev=0; mdc800->open=0; mdc800->state=NOT_CONNECTED; memset(mdc800, 0, sizeof(struct mdc800_data)); init_waitqueue_head (&mdc800->irq_wait); init_waitqueue_head (&mdc800->write_wait); init_waitqueue_head (&mdc800->download_wait); try (mdc800->irq_urb_buffer=kmalloc (8, GFP_KERNEL)); try (mdc800->write_urb_buffer=kmalloc (8, GFP_KERNEL)); try (mdc800->download_urb_buffer=kmalloc (64, GFP_KERNEL)); try (mdc800->irq_urb=usb_alloc_urb (0)); try (mdc800->download_urb=usb_alloc_urb (0)); try (mdc800->write_urb=usb_alloc_urb (0)); /* Register the driver */ if (usb_register (&mdc800_usb_driver) < 0) goto cleanup_on_fail; info ("Mustek Digital Camera Driver " VERSION " (MDC800)"); info (RELEASE_DATE " Henning Zabel <henning@uni-paderborn.de>"); return 0; /* Clean driver up, when something fails */ cleanup_on_fail: if (mdc800 != 0) { err ("can't alloc memory!"); try_free_mem (mdc800->download_urb_buffer); try_free_mem (mdc800->write_urb_buffer); try_free_mem (mdc800->irq_urb_buffer); try_free_urb (mdc800->write_urb); try_free_urb (mdc800->download_urb); try_free_urb (mdc800->irq_urb); kfree (mdc800); } mdc800=0; return -1; } void __exit usb_mdc800_cleanup (void) { usb_deregister (&mdc800_usb_driver); usb_free_urb (mdc800->irq_urb); usb_free_urb (mdc800->download_urb); usb_free_urb (mdc800->write_urb); kfree (mdc800->irq_urb_buffer); kfree (mdc800->write_urb_buffer); kfree (mdc800->download_urb_buffer); kfree (mdc800); mdc800=0; } MODULE_AUTHOR ("Henning Zabel <henning@uni-paderborn.de>"); MODULE_DESCRIPTION ("USB Driver for Mustek MDC800 Digital Camera"); module_init (usb_mdc800_init); module_exit (usb_mdc800_cleanup); |