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 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 #ifdef MODULE 170 171 #define applicom_init init_module 172 173 void cleanup_module(void) 174 { 175 unsigned int i; 176 177 misc_deregister(&ac_miscdev); 178 179 for (i = 0; i < MAX_BOARD; i++) { 180 181 if (!apbs[i].RamIO) 182 continue; 183 184 if (apbs[i].irq) 185 free_irq(apbs[i].irq, &dummy); 186 187 iounmap(apbs[i].RamIO); 188 } 189 } 190 191 #endif /* MODULE */ 192 193 int __init applicom_init(void) 194 { 195 int i, numisa = 0; 196 struct pci_dev *dev = NULL; 197 void __iomem *RamIO; 198 int boardno, ret; 199 200 printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n"); 201 202 /* No mem and irq given - check for a PCI card */ 203 204 while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) { 205 206 if (dev->vendor != PCI_VENDOR_ID_APPLICOM) 207 continue; 208 209 if (dev->device > MAX_PCI_DEVICE_NUM || dev->device == 0) 210 continue; 211 212 if (pci_enable_device(dev)) 213 return -EIO; 214 215 RamIO = ioremap(dev->resource[0].start, LEN_RAM_IO); 216 217 if (!RamIO) { 218 printk(KERN_INFO "ac.o: Failed to ioremap PCI memory space at 0x%lx\n", dev->resource[0].start); 219 pci_disable_device(dev); 220 return -EIO; 221 } 222 223 printk(KERN_INFO "Applicom %s found at mem 0x%lx, irq %d\n", 224 applicom_pci_devnames[dev->device-1], dev->resource[0].start, 225 dev->irq); 226 227 boardno = ac_register_board(dev->resource[0].start, RamIO,0); 228 if (!boardno) { 229 printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n"); 230 iounmap(RamIO); 231 pci_disable_device(dev); 232 continue; 233 } 234 235 if (request_irq(dev->irq, &ac_interrupt, SA_SHIRQ, "Applicom PCI", &dummy)) { 236 printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq); 237 iounmap(RamIO); 238 pci_disable_device(dev); 239 apbs[boardno - 1].RamIO = NULL; 240 continue; 241 } 242 243 /* Enable interrupts. */ 244 245 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC); 246 247 apbs[boardno - 1].irq = dev->irq; 248 } 249 250 /* Finished with PCI cards. If none registered, 251 * and there was no mem/irq specified, exit */ 252 253 if (!mem || !irq) { 254 if (numboards) 255 goto fin; 256 else { 257 printk(KERN_INFO "ac.o: No PCI boards found.\n"); 258 printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n"); 259 return -ENXIO; 260 } 261 } 262 263 /* Now try the specified ISA cards */ 264 265 for (i = 0; i < MAX_ISA_BOARD; i++) { 266 RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO); 267 268 if (!RamIO) { 269 printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1); 270 continue; 271 } 272 273 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i), 274 RamIO,i+1))) { 275 iounmap(RamIO); 276 continue; 277 } 278 279 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq); 280 281 if (!numisa) { 282 if (request_irq(irq, &ac_interrupt, SA_SHIRQ, "Applicom ISA", &dummy)) { 283 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq); 284 iounmap(RamIO); 285 apbs[boardno - 1].RamIO = NULL; 286 } 287 else 288 apbs[boardno - 1].irq = irq; 289 } 290 else 291 apbs[boardno - 1].irq = 0; 292 293 numisa++; 294 } 295 296 if (!numisa) 297 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found " 298 "at mem 0x%lx\n", mem); 299 300 fin: 301 init_waitqueue_head(&FlagSleepRec); 302 303 WriteErrorCount = 0; 304 ReadErrorCount = 0; 305 DeviceErrorCount = 0; 306 307 if (numboards) { 308 ret = misc_register(&ac_miscdev); 309 if (ret) { 310 printk(KERN_WARNING "ac.o: Unable to register misc device\n"); 311 goto out; 312 } 313 for (i = 0; i < MAX_BOARD; i++) { 314 int serial; 315 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; 316 317 if (!apbs[i].RamIO) 318 continue; 319 320 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) 321 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); 322 323 boardname[serial] = 0; 324 325 326 printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d", 327 i+1, boardname, 328 (int)(readb(apbs[i].RamIO + VERS) >> 4), 329 (int)(readb(apbs[i].RamIO + VERS) & 0xF)); 330 331 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 332 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 333 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); 334 335 if (serial != 0) 336 printk(" S/N %d\n", serial); 337 else 338 printk("\n"); 339 } 340 return 0; 341 } 342 343 else 344 return -ENXIO; 345 346 out: 347 for (i = 0; i < MAX_BOARD; i++) { 348 if (!apbs[i].RamIO) 349 continue; 350 if (apbs[i].irq) 351 free_irq(apbs[i].irq, &dummy); 352 iounmap(apbs[i].RamIO); 353 } 354 pci_disable_device(dev); 355 return ret; 356 } 357 358 359 #ifndef MODULE 360 __initcall(applicom_init); 361 #endif 362 363 static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos) 364 { 365 unsigned int NumCard; /* Board number 1 -> 8 */ 366 unsigned int IndexCard; /* Index board number 0 -> 7 */ 367 unsigned char TicCard; /* Board TIC to send */ 368 unsigned long flags; /* Current priority */ 369 struct st_ram_io st_loc; 370 struct mailbox tmpmailbox; 371 #ifdef DEBUG 372 int c; 373 #endif 374 DECLARE_WAITQUEUE(wait, current); 375 376 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { 377 static int warncount = 5; 378 if (warncount) { 379 printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n", 380 count, sizeof(struct st_ram_io) + sizeof(struct mailbox)); 381 warncount--; 382 } 383 return -EINVAL; 384 } 385 386 if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io))) 387 return -EFAULT; 388 389 if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)], 390 sizeof(struct mailbox))) 391 return -EFAULT; 392 393 NumCard = st_loc.num_card; /* board number to send */ 394 TicCard = st_loc.tic_des_from_pc; /* tic number to send */ 395 IndexCard = NumCard - 1; 396 397 if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO) 398 return -EINVAL; 399 400 #ifdef DEBUG 401 printk("Write to applicom card #%d. struct st_ram_io follows:", 402 IndexCard+1); 403 404 for (c = 0; c < sizeof(struct st_ram_io);) { 405 406 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]); 407 408 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { 409 printk(" %2.2X", ((unsigned char *) &st_loc)[c]); 410 } 411 } 412 413 printk("\nstruct mailbox follows:"); 414 415 for (c = 0; c < sizeof(struct mailbox);) { 416 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]); 417 418 for (c++; c % 8 && c < sizeof(struct mailbox); c++) { 419 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]); 420 } 421 } 422 423 printk("\n"); 424 #endif 425 426 spin_lock_irqsave(&apbs[IndexCard].mutex, flags); 427 428 /* Test octet ready correct */ 429 if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { 430 Dummy = readb(apbs[IndexCard].RamIO + VERS); 431 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); 432 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n", 433 IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY)); 434 DeviceErrorCount++; 435 return -EIO; 436 } 437 438 /* Place ourselves on the wait queue */ 439 set_current_state(TASK_INTERRUPTIBLE); 440 add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); 441 442 /* Check whether the card is ready for us */ 443 while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) { 444 Dummy = readb(apbs[IndexCard].RamIO + VERS); 445 /* It's busy. Sleep. */ 446 447 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); 448 schedule(); 449 if (signal_pending(current)) { 450 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, 451 &wait); 452 return -EINTR; 453 } 454 spin_lock_irqsave(&apbs[IndexCard].mutex, flags); 455 set_current_state(TASK_INTERRUPTIBLE); 456 } 457 458 /* We may not have actually slept */ 459 set_current_state(TASK_RUNNING); 460 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); 461 462 writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 463 464 /* Which is best - lock down the pages with rawio and then 465 copy directly, or use bounce buffers? For now we do the latter 466 because it works with 2.2 still */ 467 { 468 unsigned char *from = (unsigned char *) &tmpmailbox; 469 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC; 470 int c; 471 472 for (c = 0; c < sizeof(struct mailbox); c++) 473 writeb(*(from++), to++); 474 } 475 476 writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC); 477 writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC); 478 writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC); 479 writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); 480 writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 481 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 482 Dummy = readb(apbs[IndexCard].RamIO + VERS); 483 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); 484 return 0; 485 } 486 487 static int do_ac_read(int IndexCard, char __user *buf, 488 struct st_ram_io *st_loc, struct mailbox *mailbox) 489 { 490 void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC; 491 unsigned char *to = (unsigned char *)&mailbox; 492 #ifdef DEBUG 493 int c; 494 #endif 495 496 st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC); 497 st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); 498 499 500 { 501 int c; 502 503 for (c = 0; c < sizeof(struct mailbox); c++) 504 *(to++) = readb(from++); 505 } 506 writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); 507 writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC); 508 writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); 509 writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), 510 apbs[IndexCard].RamIO + TIC_ACK_FROM_PC); 511 writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); 512 writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY); 513 writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 514 Dummy = readb(apbs[IndexCard].RamIO + VERS); 515 516 #ifdef DEBUG 517 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard); 518 519 for (c = 0; c < sizeof(struct st_ram_io);) { 520 printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]); 521 522 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { 523 printk(" %2.2X", ((unsigned char *)st_loc)[c]); 524 } 525 } 526 527 printk("\nstruct mailbox follows:"); 528 529 for (c = 0; c < sizeof(struct mailbox);) { 530 printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]); 531 532 for (c++; c % 8 && c < sizeof(struct mailbox); c++) { 533 printk(" %2.2X", ((unsigned char *)mailbox)[c]); 534 } 535 } 536 printk("\n"); 537 #endif 538 return (sizeof(struct st_ram_io) + sizeof(struct mailbox)); 539 } 540 541 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr) 542 { 543 unsigned long flags; 544 unsigned int i; 545 unsigned char tmp; 546 int ret = 0; 547 DECLARE_WAITQUEUE(wait, current); 548 #ifdef DEBUG 549 int loopcount=0; 550 #endif 551 /* No need to ratelimit this. Only root can trigger it anyway */ 552 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { 553 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n", 554 count,sizeof(struct st_ram_io) + sizeof(struct mailbox)); 555 return -EINVAL; 556 } 557 558 while(1) { 559 /* Stick ourself on the wait queue */ 560 set_current_state(TASK_INTERRUPTIBLE); 561 add_wait_queue(&FlagSleepRec, &wait); 562 563 /* Scan each board, looking for one which has a packet for us */ 564 for (i=0; i < MAX_BOARD; i++) { 565 if (!apbs[i].RamIO) 566 continue; 567 spin_lock_irqsave(&apbs[i].mutex, flags); 568 569 tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY); 570 571 if (tmp == 2) { 572 struct st_ram_io st_loc; 573 struct mailbox mailbox; 574 575 /* Got a packet for us */ 576 ret = do_ac_read(i, buf, &st_loc, &mailbox); 577 spin_unlock_irqrestore(&apbs[i].mutex, flags); 578 set_current_state(TASK_RUNNING); 579 remove_wait_queue(&FlagSleepRec, &wait); 580 581 if (copy_to_user(buf, &st_loc, sizeof(st_loc))) 582 return -EFAULT; 583 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox))) 584 return -EFAULT; 585 return tmp; 586 } 587 588 if (tmp > 2) { 589 /* Got an error */ 590 Dummy = readb(apbs[i].RamIO + VERS); 591 592 spin_unlock_irqrestore(&apbs[i].mutex, flags); 593 set_current_state(TASK_RUNNING); 594 remove_wait_queue(&FlagSleepRec, &wait); 595 596 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n", 597 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); 598 DeviceErrorCount++; 599 return -EIO; 600 } 601 602 /* Nothing for us. Try the next board */ 603 Dummy = readb(apbs[i].RamIO + VERS); 604 spin_unlock_irqrestore(&apbs[i].mutex, flags); 605 606 } /* per board */ 607 608 /* OK - No boards had data for us. Sleep now */ 609 610 schedule(); 611 remove_wait_queue(&FlagSleepRec, &wait); 612 613 if (signal_pending(current)) 614 return -EINTR; 615 616 #ifdef DEBUG 617 if (loopcount++ > 2) { 618 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount); 619 } 620 #endif 621 } 622 } 623 624 static irqreturn_t ac_interrupt(int vec, void *dev_instance, struct pt_regs *regs) 625 { 626 unsigned int i; 627 unsigned int FlagInt; 628 unsigned int LoopCount; 629 int handled = 0; 630 631 // printk("Applicom interrupt on IRQ %d occurred\n", vec); 632 633 LoopCount = 0; 634 635 do { 636 FlagInt = 0; 637 for (i = 0; i < MAX_BOARD; i++) { 638 639 /* Skip if this board doesn't exist */ 640 if (!apbs[i].RamIO) 641 continue; 642 643 spin_lock(&apbs[i].mutex); 644 645 /* Skip if this board doesn't want attention */ 646 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) { 647 spin_unlock(&apbs[i].mutex); 648 continue; 649 } 650 651 handled = 1; 652 FlagInt = 1; 653 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC); 654 655 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) { 656 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n", 657 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); 658 DeviceErrorCount++; 659 } 660 661 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && 662 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) { 663 664 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n", 665 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY)); 666 DeviceErrorCount++; 667 } 668 669 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */ 670 if (waitqueue_active(&FlagSleepRec)) { 671 wake_up_interruptible(&FlagSleepRec); 672 } 673 } 674 675 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */ 676 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */ 677 wake_up_interruptible(&apbs[i].FlagSleepSend); 678 } 679 } 680 Dummy = readb(apbs[i].RamIO + VERS); 681 682 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) { 683 /* There's another int waiting on this card */ 684 spin_unlock(&apbs[i].mutex); 685 i--; 686 } else { 687 spin_unlock(&apbs[i].mutex); 688 } 689 } 690 if (FlagInt) 691 LoopCount = 0; 692 else 693 LoopCount++; 694 } while(LoopCount < 2); 695 return IRQ_RETVAL(handled); 696 } 697 698 699 700 static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) 701 702 { /* @ ADG ou ATO selon le cas */ 703 int i; 704 unsigned char IndexCard; 705 void __iomem *pmem; 706 int ret = 0; 707 volatile unsigned char byte_reset_it; 708 struct st_ram_io *adgl; 709 void __user *argp = (void __user *)arg; 710 711 /* In general, the device is only openable by root anyway, so we're not 712 particularly concerned that bogus ioctls can flood the console. */ 713 714 adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL); 715 if (!adgl) 716 return -ENOMEM; 717 718 if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) { 719 kfree(adgl); 720 return -EFAULT; 721 } 722 723 IndexCard = adgl->num_card-1; 724 725 if(cmd != 0 && cmd != 6 && 726 ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) { 727 static int warncount = 10; 728 if (warncount) { 729 printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1); 730 warncount--; 731 } 732 kfree(adgl); 733 return -EINVAL; 734 } 735 736 switch (cmd) { 737 738 case 0: 739 pmem = apbs[IndexCard].RamIO; 740 for (i = 0; i < sizeof(struct st_ram_io); i++) 741 ((unsigned char *)adgl)[i]=readb(pmem++); 742 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) 743 ret = -EFAULT; 744 break; 745 case 1: 746 pmem = apbs[IndexCard].RamIO + CONF_END_TEST; 747 for (i = 0; i < 4; i++) 748 adgl->conf_end_test[i] = readb(pmem++); 749 for (i = 0; i < 2; i++) 750 adgl->error_code[i] = readb(pmem++); 751 for (i = 0; i < 4; i++) 752 adgl->parameter_error[i] = readb(pmem++); 753 pmem = apbs[IndexCard].RamIO + VERS; 754 adgl->vers = readb(pmem); 755 pmem = apbs[IndexCard].RamIO + TYPE_CARD; 756 for (i = 0; i < 20; i++) 757 adgl->reserv1[i] = readb(pmem++); 758 *(int *)&adgl->reserv1[20] = 759 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + 760 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + 761 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) ); 762 763 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) 764 ret = -EFAULT; 765 break; 766 case 2: 767 pmem = apbs[IndexCard].RamIO + CONF_END_TEST; 768 for (i = 0; i < 10; i++) 769 writeb(0xff, pmem++); 770 writeb(adgl->data_from_pc_ready, 771 apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 772 773 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 774 775 for (i = 0; i < MAX_BOARD; i++) { 776 if (apbs[i].RamIO) { 777 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC); 778 } 779 } 780 break; 781 case 3: 782 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC; 783 writeb(adgl->tic_des_from_pc, pmem); 784 break; 785 case 4: 786 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC; 787 adgl->tic_owner_to_pc = readb(pmem++); 788 adgl->numcard_owner_to_pc = readb(pmem); 789 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io))) 790 ret = -EFAULT; 791 break; 792 case 5: 793 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); 794 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); 795 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); 796 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 797 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 798 break; 799 case 6: 800 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n"); 801 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards); 802 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem); 803 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq); 804 for (i = 0; i < MAX_BOARD; i++) { 805 int serial; 806 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; 807 808 if (!apbs[i].RamIO) 809 continue; 810 811 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) 812 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); 813 boardname[serial] = 0; 814 815 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s", 816 i+1, 817 (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4), 818 (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF), 819 boardname); 820 821 822 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 823 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 824 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); 825 826 if (serial != 0) 827 printk(" S/N %d\n", serial); 828 else 829 printk("\n"); 830 } 831 if (DeviceErrorCount != 0) 832 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount); 833 if (ReadErrorCount != 0) 834 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount); 835 if (WriteErrorCount != 0) 836 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount); 837 if (waitqueue_active(&FlagSleepRec)) 838 printk(KERN_INFO "Process in read pending\n"); 839 for (i = 0; i < MAX_BOARD; i++) { 840 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend)) 841 printk(KERN_INFO "Process in write pending board %d\n",i+1); 842 } 843 break; 844 default: 845 printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ; 846 ret = -EINVAL; 847 break; 848 } 849 Dummy = readb(apbs[IndexCard].RamIO + VERS); 850 kfree(adgl); 851 return 0; 852 } 853 854 #ifndef MODULE 855 static int __init applicom_setup(char *str) 856 { 857 int ints[4]; 858 859 (void) get_options(str, 4, ints); 860 861 if (ints[0] > 2) { 862 printk(KERN_WARNING "Too many arguments to 'applicom=', expected mem,irq only.\n"); 863 } 864 865 if (ints[0] < 2) { 866 printk(KERN_INFO"applicom numargs: %d\n", ints[0]); 867 return 0; 868 } 869 870 mem = ints[1]; 871 irq = ints[2]; 872 return 1; 873 } 874 875 __setup("applicom=", applicom_setup); 876 877 #endif /* MODULE */ 878 879