1 /* Derived from Applicom driver ac.c for SCO Unix */ 2 /* Ported by David Woodhouse, Axiom (Cambridge) Ltd. */ 3 /* dwmw2@infradead.org 30/8/98 */ 4 /* $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $ */ 5 /* This module is for Linux 2.1 and 2.2 series kernels. */ 6 /*****************************************************************************/ 7 /* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt */ 8 /* ceci pour reseter correctement apres une sortie sauvage */ 9 /* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption, */ 10 /* LoopCount n'etait pas initialise a 0. */ 11 /* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte */ 12 /* pour liberer le bus */ 13 /* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */ 14 /* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter */ 15 /* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3 */ 16 /* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes */ 17 /* adresses de base des cartes, IOCTL 6 plus complet */ 18 /* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification */ 19 /* de code autre que le texte V2.6.1 en V2.8.0 */ 20 /*****************************************************************************/ 21 22 23 #include <linux/kernel.h> 24 #include <linux/module.h> 25 #include <linux/interrupt.h> 26 #include <linux/sched.h> 27 #include <linux/slab.h> 28 #include <linux/errno.h> 29 #include <linux/miscdevice.h> 30 #include <linux/pci.h> 31 #include <linux/wait.h> 32 #include <linux/init.h> 33 #include <linux/fs.h> 34 35 #include <asm/io.h> 36 #include <asm/uaccess.h> 37 38 #include "applicom.h" 39 40 41 /* NOTE: We use for loops with {write,read}b() instead of 42 memcpy_{from,to}io throughout this driver. This is because 43 the board doesn't correctly handle word accesses - only 44 bytes. 45 */ 46 47 48 #undef DEBUG 49 50 #define MAX_BOARD 8 /* maximum of pc board possible */ 51 #define MAX_ISA_BOARD 4 52 #define LEN_RAM_IO 0x800 53 #define AC_MINOR 157 54 55 #ifndef PCI_VENDOR_ID_APPLICOM 56 #define PCI_VENDOR_ID_APPLICOM 0x1389 57 #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC 0x0001 58 #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002 59 #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x0003 60 #endif 61 62 static char *applicom_pci_devnames[] = { 63 "PCI board", 64 "PCI2000IBS / PCI2000CAN", 65 "PCI2000PFB" 66 }; 67 68 static struct pci_device_id applicom_pci_tbl[] = { 69 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) }, 70 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) }, 71 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) }, 72 { 0 } 73 }; 74 MODULE_DEVICE_TABLE(pci, applicom_pci_tbl); 75 76 MODULE_AUTHOR("David Woodhouse & Applicom International"); 77 MODULE_DESCRIPTION("Driver for Applicom Profibus card"); 78 MODULE_LICENSE("GPL"); 79 MODULE_ALIAS_MISCDEV(AC_MINOR); 80 81 MODULE_SUPPORTED_DEVICE("ac"); 82 83 84 static struct applicom_board { 85 unsigned long PhysIO; 86 void __iomem *RamIO; 87 wait_queue_head_t FlagSleepSend; 88 long irq; 89 spinlock_t mutex; 90 } apbs[MAX_BOARD]; 91 92 static unsigned int irq = 0; /* interrupt number IRQ */ 93 static unsigned long mem = 0; /* physical segment of board */ 94 95 module_param(irq, uint, 0); 96 MODULE_PARM_DESC(irq, "IRQ of the Applicom board"); 97 module_param(mem, ulong, 0); 98 MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board"); 99 100 static unsigned int numboards; /* number of installed boards */ 101 static volatile unsigned char Dummy; 102 static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec); 103 static unsigned int WriteErrorCount; /* number of write error */ 104 static unsigned int ReadErrorCount; /* number of read error */ 105 static unsigned int DeviceErrorCount; /* number of device error */ 106 107 static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *); 108 static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *); 109 static int ac_ioctl(struct inode *, struct file *, unsigned int, 110 unsigned long); 111 static irqreturn_t ac_interrupt(int, void *); 112 113 static const struct file_operations ac_fops = { 114 .owner = THIS_MODULE, 115 .llseek = no_llseek, 116 .read = ac_read, 117 .write = ac_write, 118 .ioctl = ac_ioctl, 119 }; 120 121 static struct miscdevice ac_miscdev = { 122 AC_MINOR, 123 "ac", 124 &ac_fops 125 }; 126 127 static int dummy; /* dev_id for request_irq() */ 128 129 static int ac_register_board(unsigned long physloc, void __iomem *loc, 130 unsigned char boardno) 131 { 132 volatile unsigned char byte_reset_it; 133 134 if((readb(loc + CONF_END_TEST) != 0x00) || 135 (readb(loc + CONF_END_TEST + 1) != 0x55) || 136 (readb(loc + CONF_END_TEST + 2) != 0xAA) || 137 (readb(loc + CONF_END_TEST + 3) != 0xFF)) 138 return 0; 139 140 if (!boardno) 141 boardno = readb(loc + NUMCARD_OWNER_TO_PC); 142 143 if (!boardno || boardno > MAX_BOARD) { 144 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n", 145 boardno, physloc, MAX_BOARD); 146 return 0; 147 } 148 149 if (apbs[boardno - 1].RamIO) { 150 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n", 151 boardno, physloc, boardno, apbs[boardno-1].PhysIO); 152 return 0; 153 } 154 155 boardno--; 156 157 apbs[boardno].PhysIO = physloc; 158 apbs[boardno].RamIO = loc; 159 init_waitqueue_head(&apbs[boardno].FlagSleepSend); 160 spin_lock_init(&apbs[boardno].mutex); 161 byte_reset_it = readb(loc + RAM_IT_TO_PC); 162 163 numboards++; 164 return boardno + 1; 165 } 166 167 static void __exit applicom_exit(void) 168 { 169 unsigned int i; 170 171 misc_deregister(&ac_miscdev); 172 173 for (i = 0; i < MAX_BOARD; i++) { 174 175 if (!apbs[i].RamIO) 176 continue; 177 178 if (apbs[i].irq) 179 free_irq(apbs[i].irq, &dummy); 180 181 iounmap(apbs[i].RamIO); 182 } 183 } 184 185 static int __init applicom_init(void) 186 { 187 int i, numisa = 0; 188 struct pci_dev *dev = NULL; 189 void __iomem *RamIO; 190 int boardno, ret; 191 192 printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n"); 193 194 /* No mem and irq given - check for a PCI card */ 195 196 while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) { 197 198 if (!pci_match_id(applicom_pci_tbl, dev)) 199 continue; 200 201 if (pci_enable_device(dev)) 202 return -EIO; 203 204 RamIO = ioremap_nocache(pci_resource_start(dev, 0), LEN_RAM_IO); 205 206 if (!RamIO) { 207 printk(KERN_INFO "ac.o: Failed to ioremap PCI memory " 208 "space at 0x%llx\n", 209 (unsigned long long)pci_resource_start(dev, 0)); 210 pci_disable_device(dev); 211 return -EIO; 212 } 213 214 printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n", 215 applicom_pci_devnames[dev->device-1], 216 (unsigned long long)pci_resource_start(dev, 0), 217 dev->irq); 218 219 boardno = ac_register_board(pci_resource_start(dev, 0), 220 RamIO, 0); 221 if (!boardno) { 222 printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n"); 223 iounmap(RamIO); 224 pci_disable_device(dev); 225 continue; 226 } 227 228 if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) { 229 printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq); 230 iounmap(RamIO); 231 pci_disable_device(dev); 232 apbs[boardno - 1].RamIO = NULL; 233 continue; 234 } 235 236 /* Enable interrupts. */ 237 238 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC); 239 240 apbs[boardno - 1].irq = dev->irq; 241 } 242 243 /* Finished with PCI cards. If none registered, 244 * and there was no mem/irq specified, exit */ 245 246 if (!mem || !irq) { 247 if (numboards) 248 goto fin; 249 else { 250 printk(KERN_INFO "ac.o: No PCI boards found.\n"); 251 printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n"); 252 return -ENXIO; 253 } 254 } 255 256 /* Now try the specified ISA cards */ 257 258 for (i = 0; i < MAX_ISA_BOARD; i++) { 259 RamIO = ioremap_nocache(mem + (LEN_RAM_IO * i), LEN_RAM_IO); 260 261 if (!RamIO) { 262 printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1); 263 continue; 264 } 265 266 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i), 267 RamIO,i+1))) { 268 iounmap(RamIO); 269 continue; 270 } 271 272 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq); 273 274 if (!numisa) { 275 if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) { 276 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq); 277 iounmap(RamIO); 278 apbs[boardno - 1].RamIO = NULL; 279 } 280 else 281 apbs[boardno - 1].irq = irq; 282 } 283 else 284 apbs[boardno - 1].irq = 0; 285 286 numisa++; 287 } 288 289 if (!numisa) 290 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found " 291 "at mem 0x%lx\n", mem); 292 293 fin: 294 init_waitqueue_head(&FlagSleepRec); 295 296 WriteErrorCount = 0; 297 ReadErrorCount = 0; 298 DeviceErrorCount = 0; 299 300 if (numboards) { 301 ret = misc_register(&ac_miscdev); 302 if (ret) { 303 printk(KERN_WARNING "ac.o: Unable to register misc device\n"); 304 goto out; 305 } 306 for (i = 0; i < MAX_BOARD; i++) { 307 int serial; 308 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; 309 310 if (!apbs[i].RamIO) 311 continue; 312 313 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) 314 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); 315 316 boardname[serial] = 0; 317 318 319 printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d", 320 i+1, boardname, 321 (int)(readb(apbs[i].RamIO + VERS) >> 4), 322 (int)(readb(apbs[i].RamIO + VERS) & 0xF)); 323 324 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 325 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 326 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); 327 328 if (serial != 0) 329 printk(" S/N %d\n", serial); 330 else 331 printk("\n"); 332 } 333 return 0; 334 } 335 336 else 337 return -ENXIO; 338 339 out: 340 for (i = 0; i < MAX_BOARD; i++) { 341 if (!apbs[i].RamIO) 342 continue; 343 if (apbs[i].irq) 344 free_irq(apbs[i].irq, &dummy); 345 iounmap(apbs[i].RamIO); 346 } 347 pci_disable_device(dev); 348 return ret; 349 } 350 351 module_init(applicom_init); 352 module_exit(applicom_exit); 353 354 355 static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos) 356 { 357 unsigned int NumCard; /* Board number 1 -> 8 */ 358 unsigned int IndexCard; /* Index board number 0 -> 7 */ 359 unsigned char TicCard; /* Board TIC to send */ 360 unsigned long flags; /* Current priority */ 361 struct st_ram_io st_loc; 362 struct mailbox tmpmailbox; 363 #ifdef DEBUG 364 int c; 365 #endif 366 DECLARE_WAITQUEUE(wait, current); 367 368 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { 369 static int warncount = 5; 370 if (warncount) { 371 printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n", 372 count, sizeof(struct st_ram_io) + sizeof(struct mailbox)); 373 warncount--; 374 } 375 return -EINVAL; 376 } 377 378 if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io))) 379 return -EFAULT; 380 381 if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)], 382 sizeof(struct mailbox))) 383 return -EFAULT; 384 385 NumCard = st_loc.num_card; /* board number to send */ 386 TicCard = st_loc.tic_des_from_pc; /* tic number to send */ 387 IndexCard = NumCard - 1; 388 389 if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO) 390 return -EINVAL; 391 392 #ifdef DEBUG 393 printk("Write to applicom card #%d. struct st_ram_io follows:", 394 IndexCard+1); 395 396 for (c = 0; c < sizeof(struct st_ram_io);) { 397 398 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]); 399 400 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { 401 printk(" %2.2X", ((unsigned char *) &st_loc)[c]); 402 } 403 } 404 405 printk("\nstruct mailbox follows:"); 406 407 for (c = 0; c < sizeof(struct mailbox);) { 408 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]); 409 410 for (c++; c % 8 && c < sizeof(struct mailbox); c++) { 411 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]); 412 } 413 } 414 415 printk("\n"); 416 #endif 417 418 spin_lock_irqsave(&apbs[IndexCard].mutex, flags); 419 420 /* Test octet ready correct */ 421 if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { 422 Dummy = readb(apbs[IndexCard].RamIO + VERS); 423 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); 424 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n", 425 IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY)); 426 DeviceErrorCount++; 427 return -EIO; 428 } 429 430 /* Place ourselves on the wait queue */ 431 set_current_state(TASK_INTERRUPTIBLE); 432 add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); 433 434 /* Check whether the card is ready for us */ 435 while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) { 436 Dummy = readb(apbs[IndexCard].RamIO + VERS); 437 /* It's busy. Sleep. */ 438 439 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); 440 schedule(); 441 if (signal_pending(current)) { 442 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, 443 &wait); 444 return -EINTR; 445 } 446 spin_lock_irqsave(&apbs[IndexCard].mutex, flags); 447 set_current_state(TASK_INTERRUPTIBLE); 448 } 449 450 /* We may not have actually slept */ 451 set_current_state(TASK_RUNNING); 452 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); 453 454 writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 455 456 /* Which is best - lock down the pages with rawio and then 457 copy directly, or use bounce buffers? For now we do the latter 458 because it works with 2.2 still */ 459 { 460 unsigned char *from = (unsigned char *) &tmpmailbox; 461 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC; 462 int c; 463 464 for (c = 0; c < sizeof(struct mailbox); c++) 465 writeb(*(from++), to++); 466 } 467 468 writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC); 469 writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC); 470 writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC); 471 writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); 472 writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 473 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 474 Dummy = readb(apbs[IndexCard].RamIO + VERS); 475 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); 476 return 0; 477 } 478 479 static int do_ac_read(int IndexCard, char __user *buf, 480 struct st_ram_io *st_loc, struct mailbox *mailbox) 481 { 482 void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC; 483 unsigned char *to = (unsigned char *)mailbox; 484 #ifdef DEBUG 485 int c; 486 #endif 487 488 st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC); 489 st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); 490 491 492 { 493 int c; 494 495 for (c = 0; c < sizeof(struct mailbox); c++) 496 *(to++) = readb(from++); 497 } 498 writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); 499 writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC); 500 writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); 501 writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), 502 apbs[IndexCard].RamIO + TIC_ACK_FROM_PC); 503 writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); 504 writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY); 505 writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 506 Dummy = readb(apbs[IndexCard].RamIO + VERS); 507 508 #ifdef DEBUG 509 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard); 510 511 for (c = 0; c < sizeof(struct st_ram_io);) { 512 printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]); 513 514 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { 515 printk(" %2.2X", ((unsigned char *)st_loc)[c]); 516 } 517 } 518 519 printk("\nstruct mailbox follows:"); 520 521 for (c = 0; c < sizeof(struct mailbox);) { 522 printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]); 523 524 for (c++; c % 8 && c < sizeof(struct mailbox); c++) { 525 printk(" %2.2X", ((unsigned char *)mailbox)[c]); 526 } 527 } 528 printk("\n"); 529 #endif 530 return (sizeof(struct st_ram_io) + sizeof(struct mailbox)); 531 } 532 533 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr) 534 { 535 unsigned long flags; 536 unsigned int i; 537 unsigned char tmp; 538 int ret = 0; 539 DECLARE_WAITQUEUE(wait, current); 540 #ifdef DEBUG 541 int loopcount=0; 542 #endif 543 /* No need to ratelimit this. Only root can trigger it anyway */ 544 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { 545 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n", 546 count,sizeof(struct st_ram_io) + sizeof(struct mailbox)); 547 return -EINVAL; 548 } 549 550 while(1) { 551 /* Stick ourself on the wait queue */ 552 set_current_state(TASK_INTERRUPTIBLE); 553 add_wait_queue(&FlagSleepRec, &wait); 554 555 /* Scan each board, looking for one which has a packet for us */ 556 for (i=0; i < MAX_BOARD; i++) { 557 if (!apbs[i].RamIO) 558 continue; 559 spin_lock_irqsave(&apbs[i].mutex, flags); 560 561 tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY); 562 563 if (tmp == 2) { 564 struct st_ram_io st_loc; 565 struct mailbox mailbox; 566 567 /* Got a packet for us */ 568 ret = do_ac_read(i, buf, &st_loc, &mailbox); 569 spin_unlock_irqrestore(&apbs[i].mutex, flags); 570 set_current_state(TASK_RUNNING); 571 remove_wait_queue(&FlagSleepRec, &wait); 572 573 if (copy_to_user(buf, &st_loc, sizeof(st_loc))) 574 return -EFAULT; 575 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox))) 576 return -EFAULT; 577 return tmp; 578 } 579 580 if (tmp > 2) { 581 /* Got an error */ 582 Dummy = readb(apbs[i].RamIO + VERS); 583 584 spin_unlock_irqrestore(&apbs[i].mutex, flags); 585 set_current_state(TASK_RUNNING); 586 remove_wait_queue(&FlagSleepRec, &wait); 587 588 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n", 589 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); 590 DeviceErrorCount++; 591 return -EIO; 592 } 593 594 /* Nothing for us. Try the next board */ 595 Dummy = readb(apbs[i].RamIO + VERS); 596 spin_unlock_irqrestore(&apbs[i].mutex, flags); 597 598 } /* per board */ 599 600 /* OK - No boards had data for us. Sleep now */ 601 602 schedule(); 603 remove_wait_queue(&FlagSleepRec, &wait); 604 605 if (signal_pending(current)) 606 return -EINTR; 607 608 #ifdef DEBUG 609 if (loopcount++ > 2) { 610 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount); 611 } 612 #endif 613 } 614 } 615 616 static irqreturn_t ac_interrupt(int vec, void *dev_instance) 617 { 618 unsigned int i; 619 unsigned int FlagInt; 620 unsigned int LoopCount; 621 int handled = 0; 622 623 // printk("Applicom interrupt on IRQ %d occurred\n", vec); 624 625 LoopCount = 0; 626 627 do { 628 FlagInt = 0; 629 for (i = 0; i < MAX_BOARD; i++) { 630 631 /* Skip if this board doesn't exist */ 632 if (!apbs[i].RamIO) 633 continue; 634 635 spin_lock(&apbs[i].mutex); 636 637 /* Skip if this board doesn't want attention */ 638 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) { 639 spin_unlock(&apbs[i].mutex); 640 continue; 641 } 642 643 handled = 1; 644 FlagInt = 1; 645 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC); 646 647 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) { 648 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n", 649 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); 650 DeviceErrorCount++; 651 } 652 653 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && 654 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) { 655 656 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n", 657 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY)); 658 DeviceErrorCount++; 659 } 660 661 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */ 662 if (waitqueue_active(&FlagSleepRec)) { 663 wake_up_interruptible(&FlagSleepRec); 664 } 665 } 666 667 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */ 668 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */ 669 wake_up_interruptible(&apbs[i].FlagSleepSend); 670 } 671 } 672 Dummy = readb(apbs[i].RamIO + VERS); 673 674 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) { 675 /* There's another int waiting on this card */ 676 spin_unlock(&apbs[i].mutex); 677 i--; 678 } else { 679 spin_unlock(&apbs[i].mutex); 680 } 681 } 682 if (FlagInt) 683 LoopCount = 0; 684 else 685 LoopCount++; 686 } while(LoopCount < 2); 687 return IRQ_RETVAL(handled); 688 } 689 690 691 692 static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) 693 694 { /* @ ADG ou ATO selon le cas */ 695 int i; 696 unsigned char IndexCard; 697 void __iomem *pmem; 698 int ret = 0; 699 volatile unsigned char byte_reset_it; 700 struct st_ram_io *adgl; 701 void __user *argp = (void __user *)arg; 702 703 /* In general, the device is only openable by root anyway, so we're not 704 particularly concerned that bogus ioctls can flood the console. */ 705 706 adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL); 707 if (!adgl) 708 return -ENOMEM; 709 710 if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) { 711 kfree(adgl); 712 return -EFAULT; 713 } 714 715 IndexCard = adgl->num_card-1; 716 717 if(cmd != 6 && ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) { 718 static int warncount = 10; 719 if (warncount) { 720 printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1); 721 warncount--; 722 } 723 kfree(adgl); 724 return -EINVAL; 725 } 726 727 switch (cmd) { 728 729 case 0: 730 pmem = apbs[IndexCard].RamIO; 731 for (i = 0; i < sizeof(struct st_ram_io); i++) 732 ((unsigned char *)adgl)[i]=readb(pmem++); 733 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) 734 ret = -EFAULT; 735 break; 736 case 1: 737 pmem = apbs[IndexCard].RamIO + CONF_END_TEST; 738 for (i = 0; i < 4; i++) 739 adgl->conf_end_test[i] = readb(pmem++); 740 for (i = 0; i < 2; i++) 741 adgl->error_code[i] = readb(pmem++); 742 for (i = 0; i < 4; i++) 743 adgl->parameter_error[i] = readb(pmem++); 744 pmem = apbs[IndexCard].RamIO + VERS; 745 adgl->vers = readb(pmem); 746 pmem = apbs[IndexCard].RamIO + TYPE_CARD; 747 for (i = 0; i < 20; i++) 748 adgl->reserv1[i] = readb(pmem++); 749 *(int *)&adgl->reserv1[20] = 750 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + 751 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + 752 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) ); 753 754 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) 755 ret = -EFAULT; 756 break; 757 case 2: 758 pmem = apbs[IndexCard].RamIO + CONF_END_TEST; 759 for (i = 0; i < 10; i++) 760 writeb(0xff, pmem++); 761 writeb(adgl->data_from_pc_ready, 762 apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 763 764 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 765 766 for (i = 0; i < MAX_BOARD; i++) { 767 if (apbs[i].RamIO) { 768 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC); 769 } 770 } 771 break; 772 case 3: 773 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC; 774 writeb(adgl->tic_des_from_pc, pmem); 775 break; 776 case 4: 777 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC; 778 adgl->tic_owner_to_pc = readb(pmem++); 779 adgl->numcard_owner_to_pc = readb(pmem); 780 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io))) 781 ret = -EFAULT; 782 break; 783 case 5: 784 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); 785 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); 786 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); 787 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 788 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 789 break; 790 case 6: 791 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n"); 792 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards); 793 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem); 794 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq); 795 for (i = 0; i < MAX_BOARD; i++) { 796 int serial; 797 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; 798 799 if (!apbs[i].RamIO) 800 continue; 801 802 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) 803 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); 804 boardname[serial] = 0; 805 806 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s", 807 i+1, 808 (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4), 809 (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF), 810 boardname); 811 812 813 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 814 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 815 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); 816 817 if (serial != 0) 818 printk(" S/N %d\n", serial); 819 else 820 printk("\n"); 821 } 822 if (DeviceErrorCount != 0) 823 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount); 824 if (ReadErrorCount != 0) 825 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount); 826 if (WriteErrorCount != 0) 827 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount); 828 if (waitqueue_active(&FlagSleepRec)) 829 printk(KERN_INFO "Process in read pending\n"); 830 for (i = 0; i < MAX_BOARD; i++) { 831 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend)) 832 printk(KERN_INFO "Process in write pending board %d\n",i+1); 833 } 834 break; 835 default: 836 ret = -ENOTTY; 837 break; 838 } 839 Dummy = readb(apbs[IndexCard].RamIO + VERS); 840 kfree(adgl); 841 return 0; 842 } 843 844