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