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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 | /* Derived from Applicom driver ac.c for SCO Unix */ /* Ported by David Woodhouse, Axiom (Cambridge) Ltd. */ /* dwmw2@infradead.org 30/8/98 */ /* $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $ */ /* This module is for Linux 2.1 and 2.2 series kernels. */ /*****************************************************************************/ /* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt */ /* ceci pour reseter correctement apres une sortie sauvage */ /* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption, */ /* LoopCount n'etait pas initialise a 0. */ /* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte */ /* pour liberer le bus */ /* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */ /* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter */ /* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3 */ /* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes */ /* addresses de base des cartes, IOCTL 6 plus complet */ /* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification */ /* de code autre que le texte V2.6.1 en V2.8.0 */ /*****************************************************************************/ #include <linux/kernel.h> #include <linux/module.h> #include <linux/interrupt.h> #include <linux/sched/signal.h> #include <linux/slab.h> #include <linux/errno.h> #include <linux/mutex.h> #include <linux/miscdevice.h> #include <linux/pci.h> #include <linux/wait.h> #include <linux/init.h> #include <linux/fs.h> #include <linux/nospec.h> #include <asm/io.h> #include <linux/uaccess.h> #include "applicom.h" /* NOTE: We use for loops with {write,read}b() instead of memcpy_{from,to}io throughout this driver. This is because the board doesn't correctly handle word accesses - only bytes. */ #undef DEBUG #define MAX_BOARD 8 /* maximum of pc board possible */ #define MAX_ISA_BOARD 4 #define LEN_RAM_IO 0x800 #define AC_MINOR 157 #ifndef PCI_VENDOR_ID_APPLICOM #define PCI_VENDOR_ID_APPLICOM 0x1389 #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC 0x0001 #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002 #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x0003 #endif static DEFINE_MUTEX(ac_mutex); static char *applicom_pci_devnames[] = { "PCI board", "PCI2000IBS / PCI2000CAN", "PCI2000PFB" }; static const struct pci_device_id applicom_pci_tbl[] = { { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) }, { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) }, { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) }, { 0 } }; MODULE_DEVICE_TABLE(pci, applicom_pci_tbl); MODULE_AUTHOR("David Woodhouse & Applicom International"); MODULE_DESCRIPTION("Driver for Applicom Profibus card"); MODULE_LICENSE("GPL"); MODULE_ALIAS_MISCDEV(AC_MINOR); MODULE_SUPPORTED_DEVICE("ac"); static struct applicom_board { unsigned long PhysIO; void __iomem *RamIO; wait_queue_head_t FlagSleepSend; long irq; spinlock_t mutex; } apbs[MAX_BOARD]; static unsigned int irq = 0; /* interrupt number IRQ */ static unsigned long mem = 0; /* physical segment of board */ module_param_hw(irq, uint, irq, 0); MODULE_PARM_DESC(irq, "IRQ of the Applicom board"); module_param_hw(mem, ulong, iomem, 0); MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board"); static unsigned int numboards; /* number of installed boards */ static volatile unsigned char Dummy; static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec); static unsigned int WriteErrorCount; /* number of write error */ static unsigned int ReadErrorCount; /* number of read error */ static unsigned int DeviceErrorCount; /* number of device error */ static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *); static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *); static long ac_ioctl(struct file *, unsigned int, unsigned long); static irqreturn_t ac_interrupt(int, void *); static const struct file_operations ac_fops = { .owner = THIS_MODULE, .llseek = no_llseek, .read = ac_read, .write = ac_write, .unlocked_ioctl = ac_ioctl, }; static struct miscdevice ac_miscdev = { AC_MINOR, "ac", &ac_fops }; static int dummy; /* dev_id for request_irq() */ static int ac_register_board(unsigned long physloc, void __iomem *loc, unsigned char boardno) { volatile unsigned char byte_reset_it; if((readb(loc + CONF_END_TEST) != 0x00) || (readb(loc + CONF_END_TEST + 1) != 0x55) || (readb(loc + CONF_END_TEST + 2) != 0xAA) || (readb(loc + CONF_END_TEST + 3) != 0xFF)) return 0; if (!boardno) boardno = readb(loc + NUMCARD_OWNER_TO_PC); if (!boardno || boardno > MAX_BOARD) { printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n", boardno, physloc, MAX_BOARD); return 0; } if (apbs[boardno - 1].RamIO) { printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n", boardno, physloc, boardno, apbs[boardno-1].PhysIO); return 0; } boardno--; apbs[boardno].PhysIO = physloc; apbs[boardno].RamIO = loc; init_waitqueue_head(&apbs[boardno].FlagSleepSend); spin_lock_init(&apbs[boardno].mutex); byte_reset_it = readb(loc + RAM_IT_TO_PC); numboards++; return boardno + 1; } static void __exit applicom_exit(void) { unsigned int i; misc_deregister(&ac_miscdev); for (i = 0; i < MAX_BOARD; i++) { if (!apbs[i].RamIO) continue; if (apbs[i].irq) free_irq(apbs[i].irq, &dummy); iounmap(apbs[i].RamIO); } } static int __init applicom_init(void) { int i, numisa = 0; struct pci_dev *dev = NULL; void __iomem *RamIO; int boardno, ret; printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n"); /* No mem and irq given - check for a PCI card */ while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) { if (!pci_match_id(applicom_pci_tbl, dev)) continue; if (pci_enable_device(dev)) return -EIO; RamIO = ioremap_nocache(pci_resource_start(dev, 0), LEN_RAM_IO); if (!RamIO) { printk(KERN_INFO "ac.o: Failed to ioremap PCI memory " "space at 0x%llx\n", (unsigned long long)pci_resource_start(dev, 0)); pci_disable_device(dev); return -EIO; } printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n", applicom_pci_devnames[dev->device-1], (unsigned long long)pci_resource_start(dev, 0), dev->irq); boardno = ac_register_board(pci_resource_start(dev, 0), RamIO, 0); if (!boardno) { printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n"); iounmap(RamIO); pci_disable_device(dev); continue; } if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) { printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq); iounmap(RamIO); pci_disable_device(dev); apbs[boardno - 1].RamIO = NULL; continue; } /* Enable interrupts. */ writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC); apbs[boardno - 1].irq = dev->irq; } /* Finished with PCI cards. If none registered, * and there was no mem/irq specified, exit */ if (!mem || !irq) { if (numboards) goto fin; else { printk(KERN_INFO "ac.o: No PCI boards found.\n"); printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n"); return -ENXIO; } } /* Now try the specified ISA cards */ for (i = 0; i < MAX_ISA_BOARD; i++) { RamIO = ioremap_nocache(mem + (LEN_RAM_IO * i), LEN_RAM_IO); if (!RamIO) { printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1); continue; } if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i), RamIO,i+1))) { iounmap(RamIO); continue; } printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq); if (!numisa) { if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) { printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq); iounmap(RamIO); apbs[boardno - 1].RamIO = NULL; } else apbs[boardno - 1].irq = irq; } else apbs[boardno - 1].irq = 0; numisa++; } if (!numisa) printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found " "at mem 0x%lx\n", mem); fin: init_waitqueue_head(&FlagSleepRec); WriteErrorCount = 0; ReadErrorCount = 0; DeviceErrorCount = 0; if (numboards) { ret = misc_register(&ac_miscdev); if (ret) { printk(KERN_WARNING "ac.o: Unable to register misc device\n"); goto out; } for (i = 0; i < MAX_BOARD; i++) { int serial; char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; if (!apbs[i].RamIO) continue; for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); boardname[serial] = 0; printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d", i+1, boardname, (int)(readb(apbs[i].RamIO + VERS) >> 4), (int)(readb(apbs[i].RamIO + VERS) & 0xF)); serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); if (serial != 0) printk(" S/N %d\n", serial); else printk("\n"); } return 0; } else return -ENXIO; out: for (i = 0; i < MAX_BOARD; i++) { if (!apbs[i].RamIO) continue; if (apbs[i].irq) free_irq(apbs[i].irq, &dummy); iounmap(apbs[i].RamIO); } return ret; } module_init(applicom_init); module_exit(applicom_exit); static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos) { unsigned int NumCard; /* Board number 1 -> 8 */ unsigned int IndexCard; /* Index board number 0 -> 7 */ unsigned char TicCard; /* Board TIC to send */ unsigned long flags; /* Current priority */ struct st_ram_io st_loc; struct mailbox tmpmailbox; #ifdef DEBUG int c; #endif DECLARE_WAITQUEUE(wait, current); if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { static int warncount = 5; if (warncount) { printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n", count, sizeof(struct st_ram_io) + sizeof(struct mailbox)); warncount--; } return -EINVAL; } if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io))) return -EFAULT; if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)], sizeof(struct mailbox))) return -EFAULT; NumCard = st_loc.num_card; /* board number to send */ TicCard = st_loc.tic_des_from_pc; /* tic number to send */ IndexCard = NumCard - 1; if (IndexCard >= MAX_BOARD) return -EINVAL; IndexCard = array_index_nospec(IndexCard, MAX_BOARD); if (!apbs[IndexCard].RamIO) return -EINVAL; #ifdef DEBUG printk("Write to applicom card #%d. struct st_ram_io follows:", IndexCard+1); for (c = 0; c < sizeof(struct st_ram_io);) { printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]); for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { printk(" %2.2X", ((unsigned char *) &st_loc)[c]); } } printk("\nstruct mailbox follows:"); for (c = 0; c < sizeof(struct mailbox);) { printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]); for (c++; c % 8 && c < sizeof(struct mailbox); c++) { printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]); } } printk("\n"); #endif spin_lock_irqsave(&apbs[IndexCard].mutex, flags); /* Test octet ready correct */ if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { Dummy = readb(apbs[IndexCard].RamIO + VERS); spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n", IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY)); DeviceErrorCount++; return -EIO; } /* Place ourselves on the wait queue */ set_current_state(TASK_INTERRUPTIBLE); add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); /* Check whether the card is ready for us */ while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) { Dummy = readb(apbs[IndexCard].RamIO + VERS); /* It's busy. Sleep. */ spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); schedule(); if (signal_pending(current)) { remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); return -EINTR; } spin_lock_irqsave(&apbs[IndexCard].mutex, flags); set_current_state(TASK_INTERRUPTIBLE); } /* We may not have actually slept */ set_current_state(TASK_RUNNING); remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); /* Which is best - lock down the pages with rawio and then copy directly, or use bounce buffers? For now we do the latter because it works with 2.2 still */ { unsigned char *from = (unsigned char *) &tmpmailbox; void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC; int c; for (c = 0; c < sizeof(struct mailbox); c++) writeb(*(from++), to++); } writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC); writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC); writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC); writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); Dummy = readb(apbs[IndexCard].RamIO + VERS); spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); return 0; } static int do_ac_read(int IndexCard, char __user *buf, struct st_ram_io *st_loc, struct mailbox *mailbox) { void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC; unsigned char *to = (unsigned char *)mailbox; #ifdef DEBUG int c; #endif st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC); st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); { int c; for (c = 0; c < sizeof(struct mailbox); c++) *(to++) = readb(from++); } writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC); writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), apbs[IndexCard].RamIO + TIC_ACK_FROM_PC); writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY); writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); Dummy = readb(apbs[IndexCard].RamIO + VERS); #ifdef DEBUG printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard); for (c = 0; c < sizeof(struct st_ram_io);) { printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]); for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { printk(" %2.2X", ((unsigned char *)st_loc)[c]); } } printk("\nstruct mailbox follows:"); for (c = 0; c < sizeof(struct mailbox);) { printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]); for (c++; c % 8 && c < sizeof(struct mailbox); c++) { printk(" %2.2X", ((unsigned char *)mailbox)[c]); } } printk("\n"); #endif return (sizeof(struct st_ram_io) + sizeof(struct mailbox)); } static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr) { unsigned long flags; unsigned int i; unsigned char tmp; int ret = 0; DECLARE_WAITQUEUE(wait, current); #ifdef DEBUG int loopcount=0; #endif /* No need to ratelimit this. Only root can trigger it anyway */ if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n", count,sizeof(struct st_ram_io) + sizeof(struct mailbox)); return -EINVAL; } while(1) { /* Stick ourself on the wait queue */ set_current_state(TASK_INTERRUPTIBLE); add_wait_queue(&FlagSleepRec, &wait); /* Scan each board, looking for one which has a packet for us */ for (i=0; i < MAX_BOARD; i++) { if (!apbs[i].RamIO) continue; spin_lock_irqsave(&apbs[i].mutex, flags); tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY); if (tmp == 2) { struct st_ram_io st_loc; struct mailbox mailbox; /* Got a packet for us */ memset(&st_loc, 0, sizeof(st_loc)); ret = do_ac_read(i, buf, &st_loc, &mailbox); spin_unlock_irqrestore(&apbs[i].mutex, flags); set_current_state(TASK_RUNNING); remove_wait_queue(&FlagSleepRec, &wait); if (copy_to_user(buf, &st_loc, sizeof(st_loc))) return -EFAULT; if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox))) return -EFAULT; return tmp; } if (tmp > 2) { /* Got an error */ Dummy = readb(apbs[i].RamIO + VERS); spin_unlock_irqrestore(&apbs[i].mutex, flags); set_current_state(TASK_RUNNING); remove_wait_queue(&FlagSleepRec, &wait); printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n", i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); DeviceErrorCount++; return -EIO; } /* Nothing for us. Try the next board */ Dummy = readb(apbs[i].RamIO + VERS); spin_unlock_irqrestore(&apbs[i].mutex, flags); } /* per board */ /* OK - No boards had data for us. Sleep now */ schedule(); remove_wait_queue(&FlagSleepRec, &wait); if (signal_pending(current)) return -EINTR; #ifdef DEBUG if (loopcount++ > 2) { printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount); } #endif } } static irqreturn_t ac_interrupt(int vec, void *dev_instance) { unsigned int i; unsigned int FlagInt; unsigned int LoopCount; int handled = 0; // printk("Applicom interrupt on IRQ %d occurred\n", vec); LoopCount = 0; do { FlagInt = 0; for (i = 0; i < MAX_BOARD; i++) { /* Skip if this board doesn't exist */ if (!apbs[i].RamIO) continue; spin_lock(&apbs[i].mutex); /* Skip if this board doesn't want attention */ if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) { spin_unlock(&apbs[i].mutex); continue; } handled = 1; FlagInt = 1; writeb(0, apbs[i].RamIO + RAM_IT_TO_PC); if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) { printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n", i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); DeviceErrorCount++; } if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) { printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n", i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY)); DeviceErrorCount++; } if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */ if (waitqueue_active(&FlagSleepRec)) { wake_up_interruptible(&FlagSleepRec); } } if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */ if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */ wake_up_interruptible(&apbs[i].FlagSleepSend); } } Dummy = readb(apbs[i].RamIO + VERS); if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) { /* There's another int waiting on this card */ spin_unlock(&apbs[i].mutex); i--; } else { spin_unlock(&apbs[i].mutex); } } if (FlagInt) LoopCount = 0; else LoopCount++; } while(LoopCount < 2); return IRQ_RETVAL(handled); } static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { /* @ ADG ou ATO selon le cas */ int i; unsigned char IndexCard; void __iomem *pmem; int ret = 0; static int warncount = 10; volatile unsigned char byte_reset_it; struct st_ram_io *adgl; void __user *argp = (void __user *)arg; /* In general, the device is only openable by root anyway, so we're not particularly concerned that bogus ioctls can flood the console. */ adgl = memdup_user(argp, sizeof(struct st_ram_io)); if (IS_ERR(adgl)) return PTR_ERR(adgl); mutex_lock(&ac_mutex); IndexCard = adgl->num_card-1; if (cmd != 6 && IndexCard >= MAX_BOARD) goto err; IndexCard = array_index_nospec(IndexCard, MAX_BOARD); if (cmd != 6 && !apbs[IndexCard].RamIO) goto err; switch (cmd) { case 0: pmem = apbs[IndexCard].RamIO; for (i = 0; i < sizeof(struct st_ram_io); i++) ((unsigned char *)adgl)[i]=readb(pmem++); if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) ret = -EFAULT; break; case 1: pmem = apbs[IndexCard].RamIO + CONF_END_TEST; for (i = 0; i < 4; i++) adgl->conf_end_test[i] = readb(pmem++); for (i = 0; i < 2; i++) adgl->error_code[i] = readb(pmem++); for (i = 0; i < 4; i++) adgl->parameter_error[i] = readb(pmem++); pmem = apbs[IndexCard].RamIO + VERS; adgl->vers = readb(pmem); pmem = apbs[IndexCard].RamIO + TYPE_CARD; for (i = 0; i < 20; i++) adgl->reserv1[i] = readb(pmem++); *(int *)&adgl->reserv1[20] = (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) ); if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) ret = -EFAULT; break; case 2: pmem = apbs[IndexCard].RamIO + CONF_END_TEST; for (i = 0; i < 10; i++) writeb(0xff, pmem++); writeb(adgl->data_from_pc_ready, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); for (i = 0; i < MAX_BOARD; i++) { if (apbs[i].RamIO) { byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC); } } break; case 3: pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC; writeb(adgl->tic_des_from_pc, pmem); break; case 4: pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC; adgl->tic_owner_to_pc = readb(pmem++); adgl->numcard_owner_to_pc = readb(pmem); if (copy_to_user(argp, adgl,sizeof(struct st_ram_io))) ret = -EFAULT; break; case 5: writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); break; case 6: printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n"); printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards); printk(KERN_INFO "Segment of board ........... %X\n", (int) mem); printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq); for (i = 0; i < MAX_BOARD; i++) { int serial; char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; if (!apbs[i].RamIO) continue; for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); boardname[serial] = 0; printk(KERN_INFO "Prom version board %d ....... V%d.%d %s", i+1, (int)(readb(apbs[i].RamIO + VERS) >> 4), (int)(readb(apbs[i].RamIO + VERS) & 0xF), boardname); serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); if (serial != 0) printk(" S/N %d\n", serial); else printk("\n"); } if (DeviceErrorCount != 0) printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount); if (ReadErrorCount != 0) printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount); if (WriteErrorCount != 0) printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount); if (waitqueue_active(&FlagSleepRec)) printk(KERN_INFO "Process in read pending\n"); for (i = 0; i < MAX_BOARD; i++) { if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend)) printk(KERN_INFO "Process in write pending board %d\n",i+1); } break; default: ret = -ENOTTY; break; } Dummy = readb(apbs[IndexCard].RamIO + VERS); kfree(adgl); mutex_unlock(&ac_mutex); return 0; err: if (warncount) { pr_warn("APPLICOM driver IOCTL, bad board number %d\n", (int)IndexCard + 1); warncount--; } kfree(adgl); mutex_unlock(&ac_mutex); return -EINVAL; } |