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/* addresses 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/mutex.h> 30#include <linux/miscdevice.h> 31#include <linux/pci.h> 32#include <linux/wait.h> 33#include <linux/init.h> 34#include <linux/fs.h> 35 36#include <asm/io.h> 37#include <asm/uaccess.h> 38 39#include "applicom.h" 40 41 42/* NOTE: We use for loops with {write,read}b() instead of 43 memcpy_{from,to}io throughout this driver. This is because 44 the board doesn't correctly handle word accesses - only 45 bytes. 46*/ 47 48 49#undef DEBUG 50 51#define MAX_BOARD 8 /* maximum of pc board possible */ 52#define MAX_ISA_BOARD 4 53#define LEN_RAM_IO 0x800 54#define AC_MINOR 157 55 56#ifndef PCI_VENDOR_ID_APPLICOM 57#define PCI_VENDOR_ID_APPLICOM 0x1389 58#define PCI_DEVICE_ID_APPLICOM_PCIGENERIC 0x0001 59#define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002 60#define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x0003 61#endif 62 63static DEFINE_MUTEX(ac_mutex); 64static char *applicom_pci_devnames[] = { 65 "PCI board", 66 "PCI2000IBS / PCI2000CAN", 67 "PCI2000PFB" 68}; 69 70static struct pci_device_id applicom_pci_tbl[] = { 71 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) }, 72 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) }, 73 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) }, 74 { 0 } 75}; 76MODULE_DEVICE_TABLE(pci, applicom_pci_tbl); 77 78MODULE_AUTHOR("David Woodhouse & Applicom International"); 79MODULE_DESCRIPTION("Driver for Applicom Profibus card"); 80MODULE_LICENSE("GPL"); 81MODULE_ALIAS_MISCDEV(AC_MINOR); 82 83MODULE_SUPPORTED_DEVICE("ac"); 84 85 86static 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 94static unsigned int irq = 0; /* interrupt number IRQ */ 95static unsigned long mem = 0; /* physical segment of board */ 96 97module_param(irq, uint, 0); 98MODULE_PARM_DESC(irq, "IRQ of the Applicom board"); 99module_param(mem, ulong, 0); 100MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board"); 101 102static unsigned int numboards; /* number of installed boards */ 103static volatile unsigned char Dummy; 104static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec); 105static unsigned int WriteErrorCount; /* number of write error */ 106static unsigned int ReadErrorCount; /* number of read error */ 107static unsigned int DeviceErrorCount; /* number of device error */ 108 109static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *); 110static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *); 111static long ac_ioctl(struct file *, unsigned int, unsigned long); 112static irqreturn_t ac_interrupt(int, void *); 113 114static const struct file_operations ac_fops = { 115 .owner = THIS_MODULE, 116 .llseek = no_llseek, 117 .read = ac_read, 118 .write = ac_write, 119 .unlocked_ioctl = ac_ioctl, 120}; 121 122static struct miscdevice ac_miscdev = { 123 AC_MINOR, 124 "ac", 125 &ac_fops 126}; 127 128static int dummy; /* dev_id for request_irq() */ 129 130static int ac_register_board(unsigned long physloc, void __iomem *loc, 131 unsigned char boardno) 132{ 133 volatile unsigned char byte_reset_it; 134 135 if((readb(loc + CONF_END_TEST) != 0x00) || 136 (readb(loc + CONF_END_TEST + 1) != 0x55) || 137 (readb(loc + CONF_END_TEST + 2) != 0xAA) || 138 (readb(loc + CONF_END_TEST + 3) != 0xFF)) 139 return 0; 140 141 if (!boardno) 142 boardno = readb(loc + NUMCARD_OWNER_TO_PC); 143 144 if (!boardno || boardno > MAX_BOARD) { 145 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n", 146 boardno, physloc, MAX_BOARD); 147 return 0; 148 } 149 150 if (apbs[boardno - 1].RamIO) { 151 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n", 152 boardno, physloc, boardno, apbs[boardno-1].PhysIO); 153 return 0; 154 } 155 156 boardno--; 157 158 apbs[boardno].PhysIO = physloc; 159 apbs[boardno].RamIO = loc; 160 init_waitqueue_head(&apbs[boardno].FlagSleepSend); 161 spin_lock_init(&apbs[boardno].mutex); 162 byte_reset_it = readb(loc + RAM_IT_TO_PC); 163 164 numboards++; 165 return boardno + 1; 166} 167 168static void __exit applicom_exit(void) 169{ 170 unsigned int i; 171 172 misc_deregister(&ac_miscdev); 173 174 for (i = 0; i < MAX_BOARD; i++) { 175 176 if (!apbs[i].RamIO) 177 continue; 178 179 if (apbs[i].irq) 180 free_irq(apbs[i].irq, &dummy); 181 182 iounmap(apbs[i].RamIO); 183 } 184} 185 186static int __init applicom_init(void) 187{ 188 int i, numisa = 0; 189 struct pci_dev *dev = NULL; 190 void __iomem *RamIO; 191 int boardno, ret; 192 193 printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n"); 194 195 /* No mem and irq given - check for a PCI card */ 196 197 while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) { 198 199 if (!pci_match_id(applicom_pci_tbl, dev)) 200 continue; 201 202 if (pci_enable_device(dev)) 203 return -EIO; 204 205 RamIO = ioremap_nocache(pci_resource_start(dev, 0), LEN_RAM_IO); 206 207 if (!RamIO) { 208 printk(KERN_INFO "ac.o: Failed to ioremap PCI memory " 209 "space at 0x%llx\n", 210 (unsigned long long)pci_resource_start(dev, 0)); 211 pci_disable_device(dev); 212 return -EIO; 213 } 214 215 printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n", 216 applicom_pci_devnames[dev->device-1], 217 (unsigned long long)pci_resource_start(dev, 0), 218 dev->irq); 219 220 boardno = ac_register_board(pci_resource_start(dev, 0), 221 RamIO, 0); 222 if (!boardno) { 223 printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n"); 224 iounmap(RamIO); 225 pci_disable_device(dev); 226 continue; 227 } 228 229 if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) { 230 printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq); 231 iounmap(RamIO); 232 pci_disable_device(dev); 233 apbs[boardno - 1].RamIO = NULL; 234 continue; 235 } 236 237 /* Enable interrupts. */ 238 239 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC); 240 241 apbs[boardno - 1].irq = dev->irq; 242 } 243 244 /* Finished with PCI cards. If none registered, 245 * and there was no mem/irq specified, exit */ 246 247 if (!mem || !irq) { 248 if (numboards) 249 goto fin; 250 else { 251 printk(KERN_INFO "ac.o: No PCI boards found.\n"); 252 printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n"); 253 return -ENXIO; 254 } 255 } 256 257 /* Now try the specified ISA cards */ 258 259 for (i = 0; i < MAX_ISA_BOARD; i++) { 260 RamIO = ioremap_nocache(mem + (LEN_RAM_IO * i), LEN_RAM_IO); 261 262 if (!RamIO) { 263 printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1); 264 continue; 265 } 266 267 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i), 268 RamIO,i+1))) { 269 iounmap(RamIO); 270 continue; 271 } 272 273 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq); 274 275 if (!numisa) { 276 if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) { 277 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq); 278 iounmap(RamIO); 279 apbs[boardno - 1].RamIO = NULL; 280 } 281 else 282 apbs[boardno - 1].irq = irq; 283 } 284 else 285 apbs[boardno - 1].irq = 0; 286 287 numisa++; 288 } 289 290 if (!numisa) 291 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found " 292 "at mem 0x%lx\n", mem); 293 294 fin: 295 init_waitqueue_head(&FlagSleepRec); 296 297 WriteErrorCount = 0; 298 ReadErrorCount = 0; 299 DeviceErrorCount = 0; 300 301 if (numboards) { 302 ret = misc_register(&ac_miscdev); 303 if (ret) { 304 printk(KERN_WARNING "ac.o: Unable to register misc device\n"); 305 goto out; 306 } 307 for (i = 0; i < MAX_BOARD; i++) { 308 int serial; 309 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; 310 311 if (!apbs[i].RamIO) 312 continue; 313 314 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) 315 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); 316 317 boardname[serial] = 0; 318 319 320 printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d", 321 i+1, boardname, 322 (int)(readb(apbs[i].RamIO + VERS) >> 4), 323 (int)(readb(apbs[i].RamIO + VERS) & 0xF)); 324 325 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 326 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 327 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); 328 329 if (serial != 0) 330 printk(" S/N %d\n", serial); 331 else 332 printk("\n"); 333 } 334 return 0; 335 } 336 337 else 338 return -ENXIO; 339 340out: 341 for (i = 0; i < MAX_BOARD; i++) { 342 if (!apbs[i].RamIO) 343 continue; 344 if (apbs[i].irq) 345 free_irq(apbs[i].irq, &dummy); 346 iounmap(apbs[i].RamIO); 347 } 348 return ret; 349} 350 351module_init(applicom_init); 352module_exit(applicom_exit); 353 354 355static 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 479static 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 533static 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 memset(&st_loc, 0, sizeof(st_loc)); 569 ret = do_ac_read(i, buf, &st_loc, &mailbox); 570 spin_unlock_irqrestore(&apbs[i].mutex, flags); 571 set_current_state(TASK_RUNNING); 572 remove_wait_queue(&FlagSleepRec, &wait); 573 574 if (copy_to_user(buf, &st_loc, sizeof(st_loc))) 575 return -EFAULT; 576 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox))) 577 return -EFAULT; 578 return tmp; 579 } 580 581 if (tmp > 2) { 582 /* Got an error */ 583 Dummy = readb(apbs[i].RamIO + VERS); 584 585 spin_unlock_irqrestore(&apbs[i].mutex, flags); 586 set_current_state(TASK_RUNNING); 587 remove_wait_queue(&FlagSleepRec, &wait); 588 589 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n", 590 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); 591 DeviceErrorCount++; 592 return -EIO; 593 } 594 595 /* Nothing for us. Try the next board */ 596 Dummy = readb(apbs[i].RamIO + VERS); 597 spin_unlock_irqrestore(&apbs[i].mutex, flags); 598 599 } /* per board */ 600 601 /* OK - No boards had data for us. Sleep now */ 602 603 schedule(); 604 remove_wait_queue(&FlagSleepRec, &wait); 605 606 if (signal_pending(current)) 607 return -EINTR; 608 609#ifdef DEBUG 610 if (loopcount++ > 2) { 611 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount); 612 } 613#endif 614 } 615} 616 617static irqreturn_t ac_interrupt(int vec, void *dev_instance) 618{ 619 unsigned int i; 620 unsigned int FlagInt; 621 unsigned int LoopCount; 622 int handled = 0; 623 624 // printk("Applicom interrupt on IRQ %d occurred\n", vec); 625 626 LoopCount = 0; 627 628 do { 629 FlagInt = 0; 630 for (i = 0; i < MAX_BOARD; i++) { 631 632 /* Skip if this board doesn't exist */ 633 if (!apbs[i].RamIO) 634 continue; 635 636 spin_lock(&apbs[i].mutex); 637 638 /* Skip if this board doesn't want attention */ 639 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) { 640 spin_unlock(&apbs[i].mutex); 641 continue; 642 } 643 644 handled = 1; 645 FlagInt = 1; 646 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC); 647 648 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) { 649 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n", 650 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); 651 DeviceErrorCount++; 652 } 653 654 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && 655 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) { 656 657 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n", 658 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY)); 659 DeviceErrorCount++; 660 } 661 662 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */ 663 if (waitqueue_active(&FlagSleepRec)) { 664 wake_up_interruptible(&FlagSleepRec); 665 } 666 } 667 668 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */ 669 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */ 670 wake_up_interruptible(&apbs[i].FlagSleepSend); 671 } 672 } 673 Dummy = readb(apbs[i].RamIO + VERS); 674 675 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) { 676 /* There's another int waiting on this card */ 677 spin_unlock(&apbs[i].mutex); 678 i--; 679 } else { 680 spin_unlock(&apbs[i].mutex); 681 } 682 } 683 if (FlagInt) 684 LoopCount = 0; 685 else 686 LoopCount++; 687 } while(LoopCount < 2); 688 return IRQ_RETVAL(handled); 689} 690 691 692 693static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 694 695{ /* @ ADG ou ATO selon le cas */ 696 int i; 697 unsigned char IndexCard; 698 void __iomem *pmem; 699 int ret = 0; 700 volatile unsigned char byte_reset_it; 701 struct st_ram_io *adgl; 702 void __user *argp = (void __user *)arg; 703 704 /* In general, the device is only openable by root anyway, so we're not 705 particularly concerned that bogus ioctls can flood the console. */ 706 707 adgl = memdup_user(argp, sizeof(struct st_ram_io)); 708 if (IS_ERR(adgl)) 709 return PTR_ERR(adgl); 710 711 mutex_lock(&ac_mutex); 712 IndexCard = adgl->num_card-1; 713 714 if(cmd != 6 && ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) { 715 static int warncount = 10; 716 if (warncount) { 717 printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1); 718 warncount--; 719 } 720 kfree(adgl); 721 mutex_unlock(&ac_mutex); 722 return -EINVAL; 723 } 724 725 switch (cmd) { 726 727 case 0: 728 pmem = apbs[IndexCard].RamIO; 729 for (i = 0; i < sizeof(struct st_ram_io); i++) 730 ((unsigned char *)adgl)[i]=readb(pmem++); 731 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) 732 ret = -EFAULT; 733 break; 734 case 1: 735 pmem = apbs[IndexCard].RamIO + CONF_END_TEST; 736 for (i = 0; i < 4; i++) 737 adgl->conf_end_test[i] = readb(pmem++); 738 for (i = 0; i < 2; i++) 739 adgl->error_code[i] = readb(pmem++); 740 for (i = 0; i < 4; i++) 741 adgl->parameter_error[i] = readb(pmem++); 742 pmem = apbs[IndexCard].RamIO + VERS; 743 adgl->vers = readb(pmem); 744 pmem = apbs[IndexCard].RamIO + TYPE_CARD; 745 for (i = 0; i < 20; i++) 746 adgl->reserv1[i] = readb(pmem++); 747 *(int *)&adgl->reserv1[20] = 748 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + 749 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + 750 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) ); 751 752 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) 753 ret = -EFAULT; 754 break; 755 case 2: 756 pmem = apbs[IndexCard].RamIO + CONF_END_TEST; 757 for (i = 0; i < 10; i++) 758 writeb(0xff, pmem++); 759 writeb(adgl->data_from_pc_ready, 760 apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 761 762 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 763 764 for (i = 0; i < MAX_BOARD; i++) { 765 if (apbs[i].RamIO) { 766 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC); 767 } 768 } 769 break; 770 case 3: 771 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC; 772 writeb(adgl->tic_des_from_pc, pmem); 773 break; 774 case 4: 775 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC; 776 adgl->tic_owner_to_pc = readb(pmem++); 777 adgl->numcard_owner_to_pc = readb(pmem); 778 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io))) 779 ret = -EFAULT; 780 break; 781 case 5: 782 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); 783 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); 784 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); 785 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 786 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 787 break; 788 case 6: 789 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n"); 790 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards); 791 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem); 792 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq); 793 for (i = 0; i < MAX_BOARD; i++) { 794 int serial; 795 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; 796 797 if (!apbs[i].RamIO) 798 continue; 799 800 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) 801 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); 802 boardname[serial] = 0; 803 804 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s", 805 i+1, 806 (int)(readb(apbs[i].RamIO + VERS) >> 4), 807 (int)(readb(apbs[i].RamIO + VERS) & 0xF), 808 boardname); 809 810 811 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 812 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 813 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); 814 815 if (serial != 0) 816 printk(" S/N %d\n", serial); 817 else 818 printk("\n"); 819 } 820 if (DeviceErrorCount != 0) 821 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount); 822 if (ReadErrorCount != 0) 823 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount); 824 if (WriteErrorCount != 0) 825 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount); 826 if (waitqueue_active(&FlagSleepRec)) 827 printk(KERN_INFO "Process in read pending\n"); 828 for (i = 0; i < MAX_BOARD; i++) { 829 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend)) 830 printk(KERN_INFO "Process in write pending board %d\n",i+1); 831 } 832 break; 833 default: 834 ret = -ENOTTY; 835 break; 836 } 837 Dummy = readb(apbs[IndexCard].RamIO + VERS); 838 kfree(adgl); 839 mutex_unlock(&ac_mutex); 840 return 0; 841} 842 843