Loading...
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 | // SPDX-License-Identifier: GPL-2.0+ /*****************************************************************************/ /* * uss720.c -- USS720 USB Parport Cable. * * Copyright (C) 1999, 2005, 2010 * Thomas Sailer (t.sailer@alumni.ethz.ch) * * Based on parport_pc.c * * History: * 0.1 04.08.1999 Created * 0.2 07.08.1999 Some fixes mainly suggested by Tim Waugh * Interrupt handling currently disabled because * usb_request_irq crashes somewhere within ohci.c * for no apparent reason (that is for me, anyway) * ECP currently untested * 0.3 10.08.1999 fixing merge errors * 0.4 13.08.1999 Added Vendor/Product ID of Brad Hard's cable * 0.5 20.09.1999 usb_control_msg wrapper used * Nov01.2000 usb_device_table support by Adam J. Richter * 08.04.2001 Identify version on module load. gb * 0.6 02.09.2005 Fix "scheduling in interrupt" problem by making save/restore * context asynchronous * */ /*****************************************************************************/ #include <linux/module.h> #include <linux/socket.h> #include <linux/parport.h> #include <linux/init.h> #include <linux/usb.h> #include <linux/delay.h> #include <linux/completion.h> #include <linux/kref.h> #include <linux/slab.h> #include <linux/sched/signal.h> #define DRIVER_AUTHOR "Thomas M. Sailer, t.sailer@alumni.ethz.ch" #define DRIVER_DESC "USB Parport Cable driver for Cables using the Lucent Technologies USS720 Chip" /* --------------------------------------------------------------------- */ struct parport_uss720_private { struct usb_device *usbdev; struct parport *pp; struct kref ref_count; __u8 reg[7]; /* USB registers */ struct list_head asynclist; spinlock_t asynclock; }; struct uss720_async_request { struct parport_uss720_private *priv; struct kref ref_count; struct list_head asynclist; struct completion compl; struct urb *urb; struct usb_ctrlrequest *dr; __u8 reg[7]; }; /* --------------------------------------------------------------------- */ static void destroy_priv(struct kref *kref) { struct parport_uss720_private *priv = container_of(kref, struct parport_uss720_private, ref_count); dev_dbg(&priv->usbdev->dev, "destroying priv datastructure\n"); usb_put_dev(priv->usbdev); priv->usbdev = NULL; kfree(priv); } static void destroy_async(struct kref *kref) { struct uss720_async_request *rq = container_of(kref, struct uss720_async_request, ref_count); struct parport_uss720_private *priv = rq->priv; unsigned long flags; if (likely(rq->urb)) usb_free_urb(rq->urb); kfree(rq->dr); spin_lock_irqsave(&priv->asynclock, flags); list_del_init(&rq->asynclist); spin_unlock_irqrestore(&priv->asynclock, flags); kfree(rq); kref_put(&priv->ref_count, destroy_priv); } /* --------------------------------------------------------------------- */ static void async_complete(struct urb *urb) { struct uss720_async_request *rq; struct parport *pp; struct parport_uss720_private *priv; int status = urb->status; rq = urb->context; priv = rq->priv; pp = priv->pp; if (status) { dev_err(&urb->dev->dev, "async_complete: urb error %d\n", status); } else if (rq->dr->bRequest == 3) { memcpy(priv->reg, rq->reg, sizeof(priv->reg)); #if 0 dev_dbg(&priv->usbdev->dev, "async_complete regs %7ph\n", priv->reg); #endif /* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */ if (rq->reg[2] & rq->reg[1] & 0x10 && pp) parport_generic_irq(pp); } complete(&rq->compl); kref_put(&rq->ref_count, destroy_async); } static struct uss720_async_request *submit_async_request(struct parport_uss720_private *priv, __u8 request, __u8 requesttype, __u16 value, __u16 index, gfp_t mem_flags) { struct usb_device *usbdev; struct uss720_async_request *rq; unsigned long flags; int ret; if (!priv) return NULL; usbdev = priv->usbdev; if (!usbdev) return NULL; rq = kzalloc(sizeof(struct uss720_async_request), mem_flags); if (!rq) return NULL; kref_init(&rq->ref_count); INIT_LIST_HEAD(&rq->asynclist); init_completion(&rq->compl); kref_get(&priv->ref_count); rq->priv = priv; rq->urb = usb_alloc_urb(0, mem_flags); if (!rq->urb) { kref_put(&rq->ref_count, destroy_async); return NULL; } rq->dr = kmalloc(sizeof(*rq->dr), mem_flags); if (!rq->dr) { kref_put(&rq->ref_count, destroy_async); return NULL; } rq->dr->bRequestType = requesttype; rq->dr->bRequest = request; rq->dr->wValue = cpu_to_le16(value); rq->dr->wIndex = cpu_to_le16(index); rq->dr->wLength = cpu_to_le16((request == 3) ? sizeof(rq->reg) : 0); usb_fill_control_urb(rq->urb, usbdev, (requesttype & 0x80) ? usb_rcvctrlpipe(usbdev, 0) : usb_sndctrlpipe(usbdev, 0), (unsigned char *)rq->dr, (request == 3) ? rq->reg : NULL, (request == 3) ? sizeof(rq->reg) : 0, async_complete, rq); /* rq->urb->transfer_flags |= URB_ASYNC_UNLINK; */ spin_lock_irqsave(&priv->asynclock, flags); list_add_tail(&rq->asynclist, &priv->asynclist); spin_unlock_irqrestore(&priv->asynclock, flags); kref_get(&rq->ref_count); ret = usb_submit_urb(rq->urb, mem_flags); if (!ret) return rq; destroy_async(&rq->ref_count); dev_err(&usbdev->dev, "submit_async_request submit_urb failed with %d\n", ret); return NULL; } static unsigned int kill_all_async_requests_priv(struct parport_uss720_private *priv) { struct uss720_async_request *rq; unsigned long flags; unsigned int ret = 0; spin_lock_irqsave(&priv->asynclock, flags); list_for_each_entry(rq, &priv->asynclist, asynclist) { usb_unlink_urb(rq->urb); ret++; } spin_unlock_irqrestore(&priv->asynclock, flags); return ret; } /* --------------------------------------------------------------------- */ static int get_1284_register(struct parport *pp, unsigned char reg, unsigned char *val, gfp_t mem_flags) { struct parport_uss720_private *priv; struct uss720_async_request *rq; static const unsigned char regindex[9] = { 4, 0, 1, 5, 5, 0, 2, 3, 6 }; int ret; if (!pp) return -EIO; priv = pp->private_data; rq = submit_async_request(priv, 3, 0xc0, ((unsigned int)reg) << 8, 0, mem_flags); if (!rq) { dev_err(&priv->usbdev->dev, "get_1284_register(%u) failed", (unsigned int)reg); return -EIO; } if (!val) { kref_put(&rq->ref_count, destroy_async); return 0; } if (wait_for_completion_timeout(&rq->compl, HZ)) { ret = rq->urb->status; *val = priv->reg[(reg >= 9) ? 0 : regindex[reg]]; if (ret) printk(KERN_WARNING "get_1284_register: " "usb error %d\n", ret); kref_put(&rq->ref_count, destroy_async); return ret; } printk(KERN_WARNING "get_1284_register timeout\n"); kill_all_async_requests_priv(priv); return -EIO; } static int set_1284_register(struct parport *pp, unsigned char reg, unsigned char val, gfp_t mem_flags) { struct parport_uss720_private *priv; struct uss720_async_request *rq; if (!pp) return -EIO; priv = pp->private_data; rq = submit_async_request(priv, 4, 0x40, (((unsigned int)reg) << 8) | val, 0, mem_flags); if (!rq) { dev_err(&priv->usbdev->dev, "set_1284_register(%u,%u) failed", (unsigned int)reg, (unsigned int)val); return -EIO; } kref_put(&rq->ref_count, destroy_async); return 0; } /* --------------------------------------------------------------------- */ /* ECR modes */ #define ECR_SPP 00 #define ECR_PS2 01 #define ECR_PPF 02 #define ECR_ECP 03 #define ECR_EPP 04 /* Safely change the mode bits in the ECR */ static int change_mode(struct parport *pp, int m) { struct parport_uss720_private *priv = pp->private_data; int mode; __u8 reg; if (get_1284_register(pp, 6, ®, GFP_KERNEL)) return -EIO; /* Bits <7:5> contain the mode. */ mode = (priv->reg[2] >> 5) & 0x7; if (mode == m) return 0; /* We have to go through mode 000 or 001 */ if (mode > ECR_PS2 && m > ECR_PS2) if (change_mode(pp, ECR_PS2)) return -EIO; if (m <= ECR_PS2 && !(priv->reg[1] & 0x20)) { /* This mode resets the FIFO, so we may * have to wait for it to drain first. */ unsigned long expire = jiffies + pp->physport->cad->timeout; switch (mode) { case ECR_PPF: /* Parallel Port FIFO mode */ case ECR_ECP: /* ECP Parallel Port mode */ /* Poll slowly. */ for (;;) { if (get_1284_register(pp, 6, ®, GFP_KERNEL)) return -EIO; if (priv->reg[2] & 0x01) break; if (time_after_eq (jiffies, expire)) /* The FIFO is stuck. */ return -EBUSY; msleep_interruptible(10); if (signal_pending (current)) break; } } } /* Set the mode. */ if (set_1284_register(pp, 6, m << 5, GFP_KERNEL)) return -EIO; if (get_1284_register(pp, 6, ®, GFP_KERNEL)) return -EIO; return 0; } /* * Clear TIMEOUT BIT in EPP MODE */ static int clear_epp_timeout(struct parport *pp) { unsigned char stat; if (get_1284_register(pp, 1, &stat, GFP_KERNEL)) return 1; return stat & 1; } /* * Access functions. */ #if 0 static int uss720_irq(int usbstatus, void *buffer, int len, void *dev_id) { struct parport *pp = (struct parport *)dev_id; struct parport_uss720_private *priv = pp->private_data; if (usbstatus != 0 || len < 4 || !buffer) return 1; memcpy(priv->reg, buffer, 4); /* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */ if (priv->reg[2] & priv->reg[1] & 0x10) parport_generic_irq(pp); return 1; } #endif static void parport_uss720_write_data(struct parport *pp, unsigned char d) { set_1284_register(pp, 0, d, GFP_KERNEL); } static unsigned char parport_uss720_read_data(struct parport *pp) { unsigned char ret; if (get_1284_register(pp, 0, &ret, GFP_KERNEL)) return 0; return ret; } static void parport_uss720_write_control(struct parport *pp, unsigned char d) { struct parport_uss720_private *priv = pp->private_data; d = (d & 0xf) | (priv->reg[1] & 0xf0); if (set_1284_register(pp, 2, d, GFP_KERNEL)) return; priv->reg[1] = d; } static unsigned char parport_uss720_read_control(struct parport *pp) { struct parport_uss720_private *priv = pp->private_data; return priv->reg[1] & 0xf; /* Use soft copy */ } static unsigned char parport_uss720_frob_control(struct parport *pp, unsigned char mask, unsigned char val) { struct parport_uss720_private *priv = pp->private_data; unsigned char d; mask &= 0x0f; val &= 0x0f; d = (priv->reg[1] & (~mask)) ^ val; if (set_1284_register(pp, 2, d, GFP_ATOMIC)) return 0; priv->reg[1] = d; return d & 0xf; } static unsigned char parport_uss720_read_status(struct parport *pp) { unsigned char ret; if (get_1284_register(pp, 1, &ret, GFP_ATOMIC)) return 0; return ret & 0xf8; } static void parport_uss720_disable_irq(struct parport *pp) { struct parport_uss720_private *priv = pp->private_data; unsigned char d; d = priv->reg[1] & ~0x10; if (set_1284_register(pp, 2, d, GFP_KERNEL)) return; priv->reg[1] = d; } static void parport_uss720_enable_irq(struct parport *pp) { struct parport_uss720_private *priv = pp->private_data; unsigned char d; d = priv->reg[1] | 0x10; if (set_1284_register(pp, 2, d, GFP_KERNEL)) return; priv->reg[1] = d; } static void parport_uss720_data_forward (struct parport *pp) { struct parport_uss720_private *priv = pp->private_data; unsigned char d; d = priv->reg[1] & ~0x20; if (set_1284_register(pp, 2, d, GFP_KERNEL)) return; priv->reg[1] = d; } static void parport_uss720_data_reverse (struct parport *pp) { struct parport_uss720_private *priv = pp->private_data; unsigned char d; d = priv->reg[1] | 0x20; if (set_1284_register(pp, 2, d, GFP_KERNEL)) return; priv->reg[1] = d; } static void parport_uss720_init_state(struct pardevice *dev, struct parport_state *s) { s->u.pc.ctr = 0xc | (dev->irq_func ? 0x10 : 0x0); s->u.pc.ecr = 0x24; } static void parport_uss720_save_state(struct parport *pp, struct parport_state *s) { struct parport_uss720_private *priv = pp->private_data; #if 0 if (get_1284_register(pp, 2, NULL, GFP_ATOMIC)) return; #endif s->u.pc.ctr = priv->reg[1]; s->u.pc.ecr = priv->reg[2]; } static void parport_uss720_restore_state(struct parport *pp, struct parport_state *s) { struct parport_uss720_private *priv = pp->private_data; set_1284_register(pp, 2, s->u.pc.ctr, GFP_ATOMIC); set_1284_register(pp, 6, s->u.pc.ecr, GFP_ATOMIC); get_1284_register(pp, 2, NULL, GFP_ATOMIC); priv->reg[1] = s->u.pc.ctr; priv->reg[2] = s->u.pc.ecr; } static size_t parport_uss720_epp_read_data(struct parport *pp, void *buf, size_t length, int flags) { struct parport_uss720_private *priv = pp->private_data; size_t got = 0; if (change_mode(pp, ECR_EPP)) return 0; for (; got < length; got++) { if (get_1284_register(pp, 4, (char *)buf, GFP_KERNEL)) break; buf++; if (priv->reg[0] & 0x01) { clear_epp_timeout(pp); break; } } change_mode(pp, ECR_PS2); return got; } static size_t parport_uss720_epp_write_data(struct parport *pp, const void *buf, size_t length, int flags) { #if 0 struct parport_uss720_private *priv = pp->private_data; size_t written = 0; if (change_mode(pp, ECR_EPP)) return 0; for (; written < length; written++) { if (set_1284_register(pp, 4, (char *)buf, GFP_KERNEL)) break; ((char*)buf)++; if (get_1284_register(pp, 1, NULL, GFP_KERNEL)) break; if (priv->reg[0] & 0x01) { clear_epp_timeout(pp); break; } } change_mode(pp, ECR_PS2); return written; #else struct parport_uss720_private *priv = pp->private_data; struct usb_device *usbdev = priv->usbdev; int rlen = 0; int i; if (!usbdev) return 0; if (change_mode(pp, ECR_EPP)) return 0; i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buf, length, &rlen, 20000); if (i) printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %zu rlen %u\n", buf, length, rlen); change_mode(pp, ECR_PS2); return rlen; #endif } static size_t parport_uss720_epp_read_addr(struct parport *pp, void *buf, size_t length, int flags) { struct parport_uss720_private *priv = pp->private_data; size_t got = 0; if (change_mode(pp, ECR_EPP)) return 0; for (; got < length; got++) { if (get_1284_register(pp, 3, (char *)buf, GFP_KERNEL)) break; buf++; if (priv->reg[0] & 0x01) { clear_epp_timeout(pp); break; } } change_mode(pp, ECR_PS2); return got; } static size_t parport_uss720_epp_write_addr(struct parport *pp, const void *buf, size_t length, int flags) { struct parport_uss720_private *priv = pp->private_data; size_t written = 0; if (change_mode(pp, ECR_EPP)) return 0; for (; written < length; written++) { if (set_1284_register(pp, 3, *(char *)buf, GFP_KERNEL)) break; buf++; if (get_1284_register(pp, 1, NULL, GFP_KERNEL)) break; if (priv->reg[0] & 0x01) { clear_epp_timeout(pp); break; } } change_mode(pp, ECR_PS2); return written; } static size_t parport_uss720_ecp_write_data(struct parport *pp, const void *buffer, size_t len, int flags) { struct parport_uss720_private *priv = pp->private_data; struct usb_device *usbdev = priv->usbdev; int rlen = 0; int i; if (!usbdev) return 0; if (change_mode(pp, ECR_ECP)) return 0; i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000); if (i) printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %zu rlen %u\n", buffer, len, rlen); change_mode(pp, ECR_PS2); return rlen; } static size_t parport_uss720_ecp_read_data(struct parport *pp, void *buffer, size_t len, int flags) { struct parport_uss720_private *priv = pp->private_data; struct usb_device *usbdev = priv->usbdev; int rlen = 0; int i; if (!usbdev) return 0; if (change_mode(pp, ECR_ECP)) return 0; i = usb_bulk_msg(usbdev, usb_rcvbulkpipe(usbdev, 2), buffer, len, &rlen, 20000); if (i) printk(KERN_ERR "uss720: recvbulk ep 2 buf %p len %zu rlen %u\n", buffer, len, rlen); change_mode(pp, ECR_PS2); return rlen; } static size_t parport_uss720_ecp_write_addr(struct parport *pp, const void *buffer, size_t len, int flags) { size_t written = 0; if (change_mode(pp, ECR_ECP)) return 0; for (; written < len; written++) { if (set_1284_register(pp, 5, *(char *)buffer, GFP_KERNEL)) break; buffer++; } change_mode(pp, ECR_PS2); return written; } static size_t parport_uss720_write_compat(struct parport *pp, const void *buffer, size_t len, int flags) { struct parport_uss720_private *priv = pp->private_data; struct usb_device *usbdev = priv->usbdev; int rlen = 0; int i; if (!usbdev) return 0; if (change_mode(pp, ECR_PPF)) return 0; i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000); if (i) printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %zu rlen %u\n", buffer, len, rlen); change_mode(pp, ECR_PS2); return rlen; } /* --------------------------------------------------------------------- */ static struct parport_operations parport_uss720_ops = { .owner = THIS_MODULE, .write_data = parport_uss720_write_data, .read_data = parport_uss720_read_data, .write_control = parport_uss720_write_control, .read_control = parport_uss720_read_control, .frob_control = parport_uss720_frob_control, .read_status = parport_uss720_read_status, .enable_irq = parport_uss720_enable_irq, .disable_irq = parport_uss720_disable_irq, .data_forward = parport_uss720_data_forward, .data_reverse = parport_uss720_data_reverse, .init_state = parport_uss720_init_state, .save_state = parport_uss720_save_state, .restore_state = parport_uss720_restore_state, .epp_write_data = parport_uss720_epp_write_data, .epp_read_data = parport_uss720_epp_read_data, .epp_write_addr = parport_uss720_epp_write_addr, .epp_read_addr = parport_uss720_epp_read_addr, .ecp_write_data = parport_uss720_ecp_write_data, .ecp_read_data = parport_uss720_ecp_read_data, .ecp_write_addr = parport_uss720_ecp_write_addr, .compat_write_data = parport_uss720_write_compat, .nibble_read_data = parport_ieee1284_read_nibble, .byte_read_data = parport_ieee1284_read_byte, }; /* --------------------------------------------------------------------- */ static int uss720_probe(struct usb_interface *intf, const struct usb_device_id *id) { struct usb_device *usbdev = usb_get_dev(interface_to_usbdev(intf)); struct usb_host_interface *interface; struct usb_endpoint_descriptor *epd; struct parport_uss720_private *priv; struct parport *pp; unsigned char reg; int i; dev_dbg(&intf->dev, "probe: vendor id 0x%x, device id 0x%x\n", le16_to_cpu(usbdev->descriptor.idVendor), le16_to_cpu(usbdev->descriptor.idProduct)); /* our known interfaces have 3 alternate settings */ if (intf->num_altsetting != 3) { usb_put_dev(usbdev); return -ENODEV; } i = usb_set_interface(usbdev, intf->altsetting->desc.bInterfaceNumber, 2); dev_dbg(&intf->dev, "set interface result %d\n", i); interface = intf->cur_altsetting; if (interface->desc.bNumEndpoints < 3) { usb_put_dev(usbdev); return -ENODEV; } /* * Allocate parport interface */ priv = kzalloc(sizeof(struct parport_uss720_private), GFP_KERNEL); if (!priv) { usb_put_dev(usbdev); return -ENOMEM; } priv->pp = NULL; priv->usbdev = usbdev; kref_init(&priv->ref_count); spin_lock_init(&priv->asynclock); INIT_LIST_HEAD(&priv->asynclist); pp = parport_register_port(0, PARPORT_IRQ_NONE, PARPORT_DMA_NONE, &parport_uss720_ops); if (!pp) { printk(KERN_WARNING "uss720: could not register parport\n"); goto probe_abort; } priv->pp = pp; pp->private_data = priv; pp->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP | PARPORT_MODE_ECP | PARPORT_MODE_COMPAT; /* set the USS720 control register to manual mode, no ECP compression, enable all ints */ set_1284_register(pp, 7, 0x00, GFP_KERNEL); set_1284_register(pp, 6, 0x30, GFP_KERNEL); /* PS/2 mode */ set_1284_register(pp, 2, 0x0c, GFP_KERNEL); /* debugging */ get_1284_register(pp, 0, ®, GFP_KERNEL); dev_dbg(&intf->dev, "reg: %7ph\n", priv->reg); i = usb_find_last_int_in_endpoint(interface, &epd); if (!i) { dev_dbg(&intf->dev, "epaddr %d interval %d\n", epd->bEndpointAddress, epd->bInterval); } parport_announce_port(pp); usb_set_intfdata(intf, pp); return 0; probe_abort: kill_all_async_requests_priv(priv); kref_put(&priv->ref_count, destroy_priv); return -ENODEV; } static void uss720_disconnect(struct usb_interface *intf) { struct parport *pp = usb_get_intfdata(intf); struct parport_uss720_private *priv; dev_dbg(&intf->dev, "disconnect\n"); usb_set_intfdata(intf, NULL); if (pp) { priv = pp->private_data; priv->pp = NULL; dev_dbg(&intf->dev, "parport_remove_port\n"); parport_remove_port(pp); parport_put_port(pp); kill_all_async_requests_priv(priv); kref_put(&priv->ref_count, destroy_priv); } dev_dbg(&intf->dev, "disconnect done\n"); } /* table of cables that work through this driver */ static const struct usb_device_id uss720_table[] = { { USB_DEVICE(0x047e, 0x1001) }, { USB_DEVICE(0x04b8, 0x0002) }, { USB_DEVICE(0x04b8, 0x0003) }, { USB_DEVICE(0x050d, 0x0002) }, { USB_DEVICE(0x050d, 0x1202) }, { USB_DEVICE(0x0557, 0x2001) }, { USB_DEVICE(0x05ab, 0x0002) }, { USB_DEVICE(0x06c6, 0x0100) }, { USB_DEVICE(0x0729, 0x1284) }, { USB_DEVICE(0x1293, 0x0002) }, { } /* Terminating entry */ }; MODULE_DEVICE_TABLE (usb, uss720_table); static struct usb_driver uss720_driver = { .name = "uss720", .probe = uss720_probe, .disconnect = uss720_disconnect, .id_table = uss720_table, }; /* --------------------------------------------------------------------- */ MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); static int __init uss720_init(void) { int retval; retval = usb_register(&uss720_driver); if (retval) goto out; printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); printk(KERN_INFO KBUILD_MODNAME ": NOTE: this is a special purpose " "driver to allow nonstandard\n"); printk(KERN_INFO KBUILD_MODNAME ": protocols (eg. bitbang) over " "USS720 usb to parallel cables\n"); printk(KERN_INFO KBUILD_MODNAME ": If you just want to connect to a " "printer, use usblp instead\n"); out: return retval; } static void __exit uss720_cleanup(void) { usb_deregister(&uss720_driver); } module_init(uss720_init); module_exit(uss720_cleanup); /* --------------------------------------------------------------------- */ |