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 #define MAX_PCI_DEVICE_NUM 3 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_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC, 70 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, 71 { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN, 72 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, 73 { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB, 74 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, 75 { 0 } 76 }; 77 MODULE_DEVICE_TABLE(pci, applicom_pci_tbl); 78 79 MODULE_AUTHOR("David Woodhouse & Applicom International"); 80 MODULE_DESCRIPTION("Driver for Applicom Profibus card"); 81 MODULE_LICENSE("GPL"); 82 83 MODULE_SUPPORTED_DEVICE("ac"); 84 85 86 static struct applicom_board { 87 unsigned long PhysIO; 88 void __iomem *RamIO; 89 wait_queue_head_t FlagSleepSend; 90 long irq; 91 spinlock_t mutex; 92 } apbs[MAX_BOARD]; 93 94 static unsigned int irq = 0; /* interrupt number IRQ */ 95 static unsigned long mem = 0; /* physical segment of board */ 96 97 module_param(irq, uint, 0); 98 MODULE_PARM_DESC(irq, "IRQ of the Applicom board"); 99 module_param(mem, ulong, 0); 100 MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board"); 101 102 static unsigned int numboards; /* number of installed boards */ 103 static volatile unsigned char Dummy; 104 static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec); 105 static unsigned int WriteErrorCount; /* number of write error */ 106 static unsigned int ReadErrorCount; /* number of read error */ 107 static unsigned int DeviceErrorCount; /* number of device error */ 108 109 static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *); 110 static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *); 111 static int ac_ioctl(struct inode *, struct file *, unsigned int, 112 unsigned long); 113 static irqreturn_t ac_interrupt(int, void *, struct pt_regs *); 114 115 static const struct file_operations ac_fops = { 116 .owner = THIS_MODULE, 117 .llseek = no_llseek, 118 .read = ac_read, 119 .write = ac_write, 120 .ioctl = ac_ioctl, 121 }; 122 123 static struct miscdevice ac_miscdev = { 124 AC_MINOR, 125 "ac", 126 &ac_fops 127 }; 128 129 static int dummy; /* dev_id for request_irq() */ 130 131 static int ac_register_board(unsigned long physloc, void __iomem *loc, 132 unsigned char boardno) 133 { 134 volatile unsigned char byte_reset_it; 135 136 if((readb(loc + CONF_END_TEST) != 0x00) || 137 (readb(loc + CONF_END_TEST + 1) != 0x55) || 138 (readb(loc + CONF_END_TEST + 2) != 0xAA) || 139 (readb(loc + CONF_END_TEST + 3) != 0xFF)) 140 return 0; 141 142 if (!boardno) 143 boardno = readb(loc + NUMCARD_OWNER_TO_PC); 144 145 if (!boardno || boardno > MAX_BOARD) { 146 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n", 147 boardno, physloc, MAX_BOARD); 148 return 0; 149 } 150 151 if (apbs[boardno - 1].RamIO) { 152 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n", 153 boardno, physloc, boardno, apbs[boardno-1].PhysIO); 154 return 0; 155 } 156 157 boardno--; 158 159 apbs[boardno].PhysIO = physloc; 160 apbs[boardno].RamIO = loc; 161 init_waitqueue_head(&apbs[boardno].FlagSleepSend); 162 spin_lock_init(&apbs[boardno].mutex); 163 byte_reset_it = readb(loc + RAM_IT_TO_PC); 164 165 numboards++; 166 return boardno + 1; 167 } 168 169 static void __exit applicom_exit(void) 170 { 171 unsigned int i; 172 173 misc_deregister(&ac_miscdev); 174 175 for (i = 0; i < MAX_BOARD; i++) { 176 177 if (!apbs[i].RamIO) 178 continue; 179 180 if (apbs[i].irq) 181 free_irq(apbs[i].irq, &dummy); 182 183 iounmap(apbs[i].RamIO); 184 } 185 } 186 187 static int __init applicom_init(void) 188 { 189 int i, numisa = 0; 190 struct pci_dev *dev = NULL; 191 void __iomem *RamIO; 192 int boardno, ret; 193 194 printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n"); 195 196 /* No mem and irq given - check for a PCI card */ 197 198 while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) { 199 200 if (dev->vendor != PCI_VENDOR_ID_APPLICOM) 201 continue; 202 203 if (dev->device > MAX_PCI_DEVICE_NUM || dev->device == 0) 204 continue; 205 206 if (pci_enable_device(dev)) 207 return -EIO; 208 209 RamIO = ioremap(dev->resource[0].start, LEN_RAM_IO); 210 211 if (!RamIO) { 212 printk(KERN_INFO "ac.o: Failed to ioremap PCI memory " 213 "space at 0x%llx\n", 214 (unsigned long long)dev->resource[0].start); 215 pci_disable_device(dev); 216 return -EIO; 217 } 218 219 printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n", 220 applicom_pci_devnames[dev->device-1], 221 (unsigned long long)dev->resource[0].start, 222 dev->irq); 223 224 boardno = ac_register_board(dev->resource[0].start, RamIO,0); 225 if (!boardno) { 226 printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n"); 227 iounmap(RamIO); 228 pci_disable_device(dev); 229 continue; 230 } 231 232 if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) { 233 printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq); 234 iounmap(RamIO); 235 pci_disable_device(dev); 236 apbs[boardno - 1].RamIO = NULL; 237 continue; 238 } 239 240 /* Enable interrupts. */ 241 242 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC); 243 244 apbs[boardno - 1].irq = dev->irq; 245 } 246 247 /* Finished with PCI cards. If none registered, 248 * and there was no mem/irq specified, exit */ 249 250 if (!mem || !irq) { 251 if (numboards) 252 goto fin; 253 else { 254 printk(KERN_INFO "ac.o: No PCI boards found.\n"); 255 printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n"); 256 return -ENXIO; 257 } 258 } 259 260 /* Now try the specified ISA cards */ 261 262 for (i = 0; i < MAX_ISA_BOARD; i++) { 263 RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO); 264 265 if (!RamIO) { 266 printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1); 267 continue; 268 } 269 270 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i), 271 RamIO,i+1))) { 272 iounmap(RamIO); 273 continue; 274 } 275 276 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq); 277 278 if (!numisa) { 279 if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) { 280 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq); 281 iounmap(RamIO); 282 apbs[boardno - 1].RamIO = NULL; 283 } 284 else 285 apbs[boardno - 1].irq = irq; 286 } 287 else 288 apbs[boardno - 1].irq = 0; 289 290 numisa++; 291 } 292 293 if (!numisa) 294 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found " 295 "at mem 0x%lx\n", mem); 296 297 fin: 298 init_waitqueue_head(&FlagSleepRec); 299 300 WriteErrorCount = 0; 301 ReadErrorCount = 0; 302 DeviceErrorCount = 0; 303 304 if (numboards) { 305 ret = misc_register(&ac_miscdev); 306 if (ret) { 307 printk(KERN_WARNING "ac.o: Unable to register misc device\n"); 308 goto out; 309 } 310 for (i = 0; i < MAX_BOARD; i++) { 311 int serial; 312 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; 313 314 if (!apbs[i].RamIO) 315 continue; 316 317 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) 318 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); 319 320 boardname[serial] = 0; 321 322 323 printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d", 324 i+1, boardname, 325 (int)(readb(apbs[i].RamIO + VERS) >> 4), 326 (int)(readb(apbs[i].RamIO + VERS) & 0xF)); 327 328 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 329 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 330 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); 331 332 if (serial != 0) 333 printk(" S/N %d\n", serial); 334 else 335 printk("\n"); 336 } 337 return 0; 338 } 339 340 else 341 return -ENXIO; 342 343 out: 344 for (i = 0; i < MAX_BOARD; i++) { 345 if (!apbs[i].RamIO) 346 continue; 347 if (apbs[i].irq) 348 free_irq(apbs[i].irq, &dummy); 349 iounmap(apbs[i].RamIO); 350 } 351 pci_disable_device(dev); 352 return ret; 353 } 354 355 module_init(applicom_init); 356 module_exit(applicom_exit); 357 358 359 static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos) 360 { 361 unsigned int NumCard; /* Board number 1 -> 8 */ 362 unsigned int IndexCard; /* Index board number 0 -> 7 */ 363 unsigned char TicCard; /* Board TIC to send */ 364 unsigned long flags; /* Current priority */ 365 struct st_ram_io st_loc; 366 struct mailbox tmpmailbox; 367 #ifdef DEBUG 368 int c; 369 #endif 370 DECLARE_WAITQUEUE(wait, current); 371 372 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { 373 static int warncount = 5; 374 if (warncount) { 375 printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n", 376 count, sizeof(struct st_ram_io) + sizeof(struct mailbox)); 377 warncount--; 378 } 379 return -EINVAL; 380 } 381 382 if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io))) 383 return -EFAULT; 384 385 if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)], 386 sizeof(struct mailbox))) 387 return -EFAULT; 388 389 NumCard = st_loc.num_card; /* board number to send */ 390 TicCard = st_loc.tic_des_from_pc; /* tic number to send */ 391 IndexCard = NumCard - 1; 392 393 if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO) 394 return -EINVAL; 395 396 #ifdef DEBUG 397 printk("Write to applicom card #%d. struct st_ram_io follows:", 398 IndexCard+1); 399 400 for (c = 0; c < sizeof(struct st_ram_io);) { 401 402 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]); 403 404 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { 405 printk(" %2.2X", ((unsigned char *) &st_loc)[c]); 406 } 407 } 408 409 printk("\nstruct mailbox follows:"); 410 411 for (c = 0; c < sizeof(struct mailbox);) { 412 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]); 413 414 for (c++; c % 8 && c < sizeof(struct mailbox); c++) { 415 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]); 416 } 417 } 418 419 printk("\n"); 420 #endif 421 422 spin_lock_irqsave(&apbs[IndexCard].mutex, flags); 423 424 /* Test octet ready correct */ 425 if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { 426 Dummy = readb(apbs[IndexCard].RamIO + VERS); 427 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); 428 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n", 429 IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY)); 430 DeviceErrorCount++; 431 return -EIO; 432 } 433 434 /* Place ourselves on the wait queue */ 435 set_current_state(TASK_INTERRUPTIBLE); 436 add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); 437 438 /* Check whether the card is ready for us */ 439 while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) { 440 Dummy = readb(apbs[IndexCard].RamIO + VERS); 441 /* It's busy. Sleep. */ 442 443 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); 444 schedule(); 445 if (signal_pending(current)) { 446 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, 447 &wait); 448 return -EINTR; 449 } 450 spin_lock_irqsave(&apbs[IndexCard].mutex, flags); 451 set_current_state(TASK_INTERRUPTIBLE); 452 } 453 454 /* We may not have actually slept */ 455 set_current_state(TASK_RUNNING); 456 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); 457 458 writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 459 460 /* Which is best - lock down the pages with rawio and then 461 copy directly, or use bounce buffers? For now we do the latter 462 because it works with 2.2 still */ 463 { 464 unsigned char *from = (unsigned char *) &tmpmailbox; 465 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC; 466 int c; 467 468 for (c = 0; c < sizeof(struct mailbox); c++) 469 writeb(*(from++), to++); 470 } 471 472 writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC); 473 writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC); 474 writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC); 475 writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); 476 writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 477 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 478 Dummy = readb(apbs[IndexCard].RamIO + VERS); 479 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); 480 return 0; 481 } 482 483 static int do_ac_read(int IndexCard, char __user *buf, 484 struct st_ram_io *st_loc, struct mailbox *mailbox) 485 { 486 void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC; 487 unsigned char *to = (unsigned char *)&mailbox; 488 #ifdef DEBUG 489 int c; 490 #endif 491 492 st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC); 493 st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); 494 495 496 { 497 int c; 498 499 for (c = 0; c < sizeof(struct mailbox); c++) 500 *(to++) = readb(from++); 501 } 502 writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); 503 writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC); 504 writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); 505 writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), 506 apbs[IndexCard].RamIO + TIC_ACK_FROM_PC); 507 writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); 508 writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY); 509 writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 510 Dummy = readb(apbs[IndexCard].RamIO + VERS); 511 512 #ifdef DEBUG 513 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard); 514 515 for (c = 0; c < sizeof(struct st_ram_io);) { 516 printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]); 517 518 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { 519 printk(" %2.2X", ((unsigned char *)st_loc)[c]); 520 } 521 } 522 523 printk("\nstruct mailbox follows:"); 524 525 for (c = 0; c < sizeof(struct mailbox);) { 526 printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]); 527 528 for (c++; c % 8 && c < sizeof(struct mailbox); c++) { 529 printk(" %2.2X", ((unsigned char *)mailbox)[c]); 530 } 531 } 532 printk("\n"); 533 #endif 534 return (sizeof(struct st_ram_io) + sizeof(struct mailbox)); 535 } 536 537 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr) 538 { 539 unsigned long flags; 540 unsigned int i; 541 unsigned char tmp; 542 int ret = 0; 543 DECLARE_WAITQUEUE(wait, current); 544 #ifdef DEBUG 545 int loopcount=0; 546 #endif 547 /* No need to ratelimit this. Only root can trigger it anyway */ 548 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { 549 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n", 550 count,sizeof(struct st_ram_io) + sizeof(struct mailbox)); 551 return -EINVAL; 552 } 553 554 while(1) { 555 /* Stick ourself on the wait queue */ 556 set_current_state(TASK_INTERRUPTIBLE); 557 add_wait_queue(&FlagSleepRec, &wait); 558 559 /* Scan each board, looking for one which has a packet for us */ 560 for (i=0; i < MAX_BOARD; i++) { 561 if (!apbs[i].RamIO) 562 continue; 563 spin_lock_irqsave(&apbs[i].mutex, flags); 564 565 tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY); 566 567 if (tmp == 2) { 568 struct st_ram_io st_loc; 569 struct mailbox mailbox; 570 571 /* Got a packet for us */ 572 ret = do_ac_read(i, buf, &st_loc, &mailbox); 573 spin_unlock_irqrestore(&apbs[i].mutex, flags); 574 set_current_state(TASK_RUNNING); 575 remove_wait_queue(&FlagSleepRec, &wait); 576 577 if (copy_to_user(buf, &st_loc, sizeof(st_loc))) 578 return -EFAULT; 579 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox))) 580 return -EFAULT; 581 return tmp; 582 } 583 584 if (tmp > 2) { 585 /* Got an error */ 586 Dummy = readb(apbs[i].RamIO + VERS); 587 588 spin_unlock_irqrestore(&apbs[i].mutex, flags); 589 set_current_state(TASK_RUNNING); 590 remove_wait_queue(&FlagSleepRec, &wait); 591 592 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n", 593 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); 594 DeviceErrorCount++; 595 return -EIO; 596 } 597 598 /* Nothing for us. Try the next board */ 599 Dummy = readb(apbs[i].RamIO + VERS); 600 spin_unlock_irqrestore(&apbs[i].mutex, flags); 601 602 } /* per board */ 603 604 /* OK - No boards had data for us. Sleep now */ 605 606 schedule(); 607 remove_wait_queue(&FlagSleepRec, &wait); 608 609 if (signal_pending(current)) 610 return -EINTR; 611 612 #ifdef DEBUG 613 if (loopcount++ > 2) { 614 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount); 615 } 616 #endif 617 } 618 } 619 620 static irqreturn_t ac_interrupt(int vec, void *dev_instance, struct pt_regs *regs) 621 { 622 unsigned int i; 623 unsigned int FlagInt; 624 unsigned int LoopCount; 625 int handled = 0; 626 627 // printk("Applicom interrupt on IRQ %d occurred\n", vec); 628 629 LoopCount = 0; 630 631 do { 632 FlagInt = 0; 633 for (i = 0; i < MAX_BOARD; i++) { 634 635 /* Skip if this board doesn't exist */ 636 if (!apbs[i].RamIO) 637 continue; 638 639 spin_lock(&apbs[i].mutex); 640 641 /* Skip if this board doesn't want attention */ 642 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) { 643 spin_unlock(&apbs[i].mutex); 644 continue; 645 } 646 647 handled = 1; 648 FlagInt = 1; 649 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC); 650 651 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) { 652 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n", 653 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); 654 DeviceErrorCount++; 655 } 656 657 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && 658 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) { 659 660 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n", 661 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY)); 662 DeviceErrorCount++; 663 } 664 665 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */ 666 if (waitqueue_active(&FlagSleepRec)) { 667 wake_up_interruptible(&FlagSleepRec); 668 } 669 } 670 671 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */ 672 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */ 673 wake_up_interruptible(&apbs[i].FlagSleepSend); 674 } 675 } 676 Dummy = readb(apbs[i].RamIO + VERS); 677 678 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) { 679 /* There's another int waiting on this card */ 680 spin_unlock(&apbs[i].mutex); 681 i--; 682 } else { 683 spin_unlock(&apbs[i].mutex); 684 } 685 } 686 if (FlagInt) 687 LoopCount = 0; 688 else 689 LoopCount++; 690 } while(LoopCount < 2); 691 return IRQ_RETVAL(handled); 692 } 693 694 695 696 static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) 697 698 { /* @ ADG ou ATO selon le cas */ 699 int i; 700 unsigned char IndexCard; 701 void __iomem *pmem; 702 int ret = 0; 703 volatile unsigned char byte_reset_it; 704 struct st_ram_io *adgl; 705 void __user *argp = (void __user *)arg; 706 707 /* In general, the device is only openable by root anyway, so we're not 708 particularly concerned that bogus ioctls can flood the console. */ 709 710 adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL); 711 if (!adgl) 712 return -ENOMEM; 713 714 if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) { 715 kfree(adgl); 716 return -EFAULT; 717 } 718 719 IndexCard = adgl->num_card-1; 720 721 if(cmd != 0 && cmd != 6 && 722 ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) { 723 static int warncount = 10; 724 if (warncount) { 725 printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1); 726 warncount--; 727 } 728 kfree(adgl); 729 return -EINVAL; 730 } 731 732 switch (cmd) { 733 734 case 0: 735 pmem = apbs[IndexCard].RamIO; 736 for (i = 0; i < sizeof(struct st_ram_io); i++) 737 ((unsigned char *)adgl)[i]=readb(pmem++); 738 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) 739 ret = -EFAULT; 740 break; 741 case 1: 742 pmem = apbs[IndexCard].RamIO + CONF_END_TEST; 743 for (i = 0; i < 4; i++) 744 adgl->conf_end_test[i] = readb(pmem++); 745 for (i = 0; i < 2; i++) 746 adgl->error_code[i] = readb(pmem++); 747 for (i = 0; i < 4; i++) 748 adgl->parameter_error[i] = readb(pmem++); 749 pmem = apbs[IndexCard].RamIO + VERS; 750 adgl->vers = readb(pmem); 751 pmem = apbs[IndexCard].RamIO + TYPE_CARD; 752 for (i = 0; i < 20; i++) 753 adgl->reserv1[i] = readb(pmem++); 754 *(int *)&adgl->reserv1[20] = 755 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + 756 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + 757 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) ); 758 759 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) 760 ret = -EFAULT; 761 break; 762 case 2: 763 pmem = apbs[IndexCard].RamIO + CONF_END_TEST; 764 for (i = 0; i < 10; i++) 765 writeb(0xff, pmem++); 766 writeb(adgl->data_from_pc_ready, 767 apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 768 769 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 770 771 for (i = 0; i < MAX_BOARD; i++) { 772 if (apbs[i].RamIO) { 773 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC); 774 } 775 } 776 break; 777 case 3: 778 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC; 779 writeb(adgl->tic_des_from_pc, pmem); 780 break; 781 case 4: 782 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC; 783 adgl->tic_owner_to_pc = readb(pmem++); 784 adgl->numcard_owner_to_pc = readb(pmem); 785 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io))) 786 ret = -EFAULT; 787 break; 788 case 5: 789 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); 790 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); 791 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); 792 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 793 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 794 break; 795 case 6: 796 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n"); 797 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards); 798 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem); 799 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq); 800 for (i = 0; i < MAX_BOARD; i++) { 801 int serial; 802 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; 803 804 if (!apbs[i].RamIO) 805 continue; 806 807 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) 808 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); 809 boardname[serial] = 0; 810 811 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s", 812 i+1, 813 (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4), 814 (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF), 815 boardname); 816 817 818 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 819 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 820 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); 821 822 if (serial != 0) 823 printk(" S/N %d\n", serial); 824 else 825 printk("\n"); 826 } 827 if (DeviceErrorCount != 0) 828 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount); 829 if (ReadErrorCount != 0) 830 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount); 831 if (WriteErrorCount != 0) 832 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount); 833 if (waitqueue_active(&FlagSleepRec)) 834 printk(KERN_INFO "Process in read pending\n"); 835 for (i = 0; i < MAX_BOARD; i++) { 836 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend)) 837 printk(KERN_INFO "Process in write pending board %d\n",i+1); 838 } 839 break; 840 default: 841 printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ; 842 ret = -EINVAL; 843 break; 844 } 845 Dummy = readb(apbs[IndexCard].RamIO + VERS); 846 kfree(adgl); 847 return 0; 848 } 849 850