1// SPDX-License-Identifier: GPL-2.0-only 2/* Derived from Applicom driver ac.c for SCO Unix */ 3/* Ported by David Woodhouse, Axiom (Cambridge) Ltd. */ 4/* dwmw2@infradead.org 30/8/98 */ 5/* $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $ */ 6/* This module is for Linux 2.1 and 2.2 series kernels. */ 7/*****************************************************************************/ 8/* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt */ 9/* ceci pour reseter correctement apres une sortie sauvage */ 10/* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption, */ 11/* LoopCount n'etait pas initialise a 0. */ 12/* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte */ 13/* pour liberer le bus */ 14/* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */ 15/* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter */ 16/* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3 */ 17/* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes */ 18/* addresses de base des cartes, IOCTL 6 plus complet */ 19/* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification */ 20/* de code autre que le texte V2.6.1 en V2.8.0 */ 21/*****************************************************************************/ 22 23 24#include <linux/kernel.h> 25#include <linux/module.h> 26#include <linux/interrupt.h> 27#include <linux/sched/signal.h> 28#include <linux/slab.h> 29#include <linux/errno.h> 30#include <linux/mutex.h> 31#include <linux/miscdevice.h> 32#include <linux/pci.h> 33#include <linux/wait.h> 34#include <linux/init.h> 35#include <linux/fs.h> 36#include <linux/nospec.h> 37 38#include <asm/io.h> 39#include <linux/uaccess.h> 40 41#include "applicom.h" 42 43 44/* NOTE: We use for loops with {write,read}b() instead of 45 memcpy_{from,to}io throughout this driver. This is because 46 the board doesn't correctly handle word accesses - only 47 bytes. 48*/ 49 50 51#undef DEBUG 52 53#define MAX_BOARD 8 /* maximum of pc board possible */ 54#define MAX_ISA_BOARD 4 55#define LEN_RAM_IO 0x800 56 57#ifndef PCI_VENDOR_ID_APPLICOM 58#define PCI_VENDOR_ID_APPLICOM 0x1389 59#define PCI_DEVICE_ID_APPLICOM_PCIGENERIC 0x0001 60#define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002 61#define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x0003 62#endif 63 64static DEFINE_MUTEX(ac_mutex); 65static char *applicom_pci_devnames[] = { 66 "PCI board", 67 "PCI2000IBS / PCI2000CAN", 68 "PCI2000PFB" 69}; 70 71static const struct pci_device_id applicom_pci_tbl[] = { 72 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) }, 73 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) }, 74 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) }, 75 { 0 } 76}; 77MODULE_DEVICE_TABLE(pci, applicom_pci_tbl); 78 79MODULE_AUTHOR("David Woodhouse & Applicom International"); 80MODULE_DESCRIPTION("Driver for Applicom Profibus card"); 81MODULE_LICENSE("GPL"); 82MODULE_ALIAS_MISCDEV(AC_MINOR); 83 84static struct applicom_board { 85 unsigned long PhysIO; 86 void __iomem *RamIO; 87 wait_queue_head_t FlagSleepSend; 88 long irq; 89 spinlock_t mutex; 90} apbs[MAX_BOARD]; 91 92static unsigned int irq; /* interrupt number IRQ */ 93static unsigned long mem; /* physical segment of board */ 94 95module_param_hw(irq, uint, irq, 0); 96MODULE_PARM_DESC(irq, "IRQ of the Applicom board"); 97module_param_hw(mem, ulong, iomem, 0); 98MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board"); 99 100static unsigned int numboards; /* number of installed boards */ 101static volatile unsigned char Dummy; 102static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec); 103static unsigned int WriteErrorCount; /* number of write error */ 104static unsigned int ReadErrorCount; /* number of read error */ 105static unsigned int DeviceErrorCount; /* number of device error */ 106 107static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *); 108static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *); 109static long ac_ioctl(struct file *, unsigned int, unsigned long); 110static irqreturn_t ac_interrupt(int, void *); 111 112static const struct file_operations ac_fops = { 113 .owner = THIS_MODULE, 114 .llseek = no_llseek, 115 .read = ac_read, 116 .write = ac_write, 117 .unlocked_ioctl = ac_ioctl, 118}; 119 120static struct miscdevice ac_miscdev = { 121 AC_MINOR, 122 "ac", 123 &ac_fops 124}; 125 126static int dummy; /* dev_id for request_irq() */ 127 128static 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 166static 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 184static 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 pci_dev_put(dev); 202 return -EIO; 203 } 204 205 RamIO = ioremap(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 pci_dev_put(dev); 213 return -EIO; 214 } 215 216 printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n", 217 applicom_pci_devnames[dev->device-1], 218 (unsigned long long)pci_resource_start(dev, 0), 219 dev->irq); 220 221 boardno = ac_register_board(pci_resource_start(dev, 0), 222 RamIO, 0); 223 if (!boardno) { 224 printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n"); 225 iounmap(RamIO); 226 pci_disable_device(dev); 227 continue; 228 } 229 230 if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) { 231 printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq); 232 iounmap(RamIO); 233 pci_disable_device(dev); 234 apbs[boardno - 1].RamIO = NULL; 235 continue; 236 } 237 238 /* Enable interrupts. */ 239 240 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC); 241 242 apbs[boardno - 1].irq = dev->irq; 243 } 244 245 /* Finished with PCI cards. If none registered, 246 * and there was no mem/irq specified, exit */ 247 248 if (!mem || !irq) { 249 if (numboards) 250 goto fin; 251 else { 252 printk(KERN_INFO "ac.o: No PCI boards found.\n"); 253 printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n"); 254 return -ENXIO; 255 } 256 } 257 258 /* Now try the specified ISA cards */ 259 260 for (i = 0; i < MAX_ISA_BOARD; i++) { 261 RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO); 262 263 if (!RamIO) { 264 printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1); 265 continue; 266 } 267 268 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i), 269 RamIO,i+1))) { 270 iounmap(RamIO); 271 continue; 272 } 273 274 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq); 275 276 if (!numisa) { 277 if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) { 278 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq); 279 iounmap(RamIO); 280 apbs[boardno - 1].RamIO = NULL; 281 } 282 else 283 apbs[boardno - 1].irq = irq; 284 } 285 else 286 apbs[boardno - 1].irq = 0; 287 288 numisa++; 289 } 290 291 if (!numisa) 292 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found " 293 "at mem 0x%lx\n", mem); 294 295 fin: 296 init_waitqueue_head(&FlagSleepRec); 297 298 WriteErrorCount = 0; 299 ReadErrorCount = 0; 300 DeviceErrorCount = 0; 301 302 if (numboards) { 303 ret = misc_register(&ac_miscdev); 304 if (ret) { 305 printk(KERN_WARNING "ac.o: Unable to register misc device\n"); 306 goto out; 307 } 308 for (i = 0; i < MAX_BOARD; i++) { 309 int serial; 310 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; 311 312 if (!apbs[i].RamIO) 313 continue; 314 315 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) 316 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); 317 318 boardname[serial] = 0; 319 320 321 printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d", 322 i+1, boardname, 323 (int)(readb(apbs[i].RamIO + VERS) >> 4), 324 (int)(readb(apbs[i].RamIO + VERS) & 0xF)); 325 326 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 327 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 328 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); 329 330 if (serial != 0) 331 printk(" S/N %d\n", serial); 332 else 333 printk("\n"); 334 } 335 return 0; 336 } 337 338 else 339 return -ENXIO; 340 341out: 342 for (i = 0; i < MAX_BOARD; i++) { 343 if (!apbs[i].RamIO) 344 continue; 345 if (apbs[i].irq) 346 free_irq(apbs[i].irq, &dummy); 347 iounmap(apbs[i].RamIO); 348 } 349 return ret; 350} 351 352module_init(applicom_init); 353module_exit(applicom_exit); 354 355 356static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos) 357{ 358 unsigned int NumCard; /* Board number 1 -> 8 */ 359 unsigned int IndexCard; /* Index board number 0 -> 7 */ 360 unsigned char TicCard; /* Board TIC to send */ 361 unsigned long flags; /* Current priority */ 362 struct st_ram_io st_loc; 363 struct mailbox tmpmailbox; 364#ifdef DEBUG 365 int c; 366#endif 367 DECLARE_WAITQUEUE(wait, current); 368 369 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { 370 static int warncount = 5; 371 if (warncount) { 372 printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n", 373 count, sizeof(struct st_ram_io) + sizeof(struct mailbox)); 374 warncount--; 375 } 376 return -EINVAL; 377 } 378 379 if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io))) 380 return -EFAULT; 381 382 if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)], 383 sizeof(struct mailbox))) 384 return -EFAULT; 385 386 NumCard = st_loc.num_card; /* board number to send */ 387 TicCard = st_loc.tic_des_from_pc; /* tic number to send */ 388 IndexCard = NumCard - 1; 389 390 if (IndexCard >= MAX_BOARD) 391 return -EINVAL; 392 IndexCard = array_index_nospec(IndexCard, MAX_BOARD); 393 394 if (!apbs[IndexCard].RamIO) 395 return -EINVAL; 396 397#ifdef DEBUG 398 printk("Write to applicom card #%d. struct st_ram_io follows:", 399 IndexCard+1); 400 401 for (c = 0; c < sizeof(struct st_ram_io);) { 402 403 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]); 404 405 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { 406 printk(" %2.2X", ((unsigned char *) &st_loc)[c]); 407 } 408 } 409 410 printk("\nstruct mailbox follows:"); 411 412 for (c = 0; c < sizeof(struct mailbox);) { 413 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]); 414 415 for (c++; c % 8 && c < sizeof(struct mailbox); c++) { 416 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]); 417 } 418 } 419 420 printk("\n"); 421#endif 422 423 spin_lock_irqsave(&apbs[IndexCard].mutex, flags); 424 425 /* Test octet ready correct */ 426 if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { 427 Dummy = readb(apbs[IndexCard].RamIO + VERS); 428 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); 429 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n", 430 IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY)); 431 DeviceErrorCount++; 432 return -EIO; 433 } 434 435 /* Place ourselves on the wait queue */ 436 set_current_state(TASK_INTERRUPTIBLE); 437 add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); 438 439 /* Check whether the card is ready for us */ 440 while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) { 441 Dummy = readb(apbs[IndexCard].RamIO + VERS); 442 /* It's busy. Sleep. */ 443 444 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); 445 schedule(); 446 if (signal_pending(current)) { 447 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, 448 &wait); 449 return -EINTR; 450 } 451 spin_lock_irqsave(&apbs[IndexCard].mutex, flags); 452 set_current_state(TASK_INTERRUPTIBLE); 453 } 454 455 /* We may not have actually slept */ 456 set_current_state(TASK_RUNNING); 457 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); 458 459 writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 460 461 /* Which is best - lock down the pages with rawio and then 462 copy directly, or use bounce buffers? For now we do the latter 463 because it works with 2.2 still */ 464 { 465 unsigned char *from = (unsigned char *) &tmpmailbox; 466 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC; 467 int c; 468 469 for (c = 0; c < sizeof(struct mailbox); c++) 470 writeb(*(from++), to++); 471 } 472 473 writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC); 474 writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC); 475 writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC); 476 writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); 477 writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 478 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 479 Dummy = readb(apbs[IndexCard].RamIO + VERS); 480 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); 481 return 0; 482} 483 484static int do_ac_read(int IndexCard, char __user *buf, 485 struct st_ram_io *st_loc, struct mailbox *mailbox) 486{ 487 void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC; 488 unsigned char *to = (unsigned char *)mailbox; 489#ifdef DEBUG 490 int c; 491#endif 492 493 st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC); 494 st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); 495 496 497 { 498 int c; 499 500 for (c = 0; c < sizeof(struct mailbox); c++) 501 *(to++) = readb(from++); 502 } 503 writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); 504 writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC); 505 writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); 506 writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), 507 apbs[IndexCard].RamIO + TIC_ACK_FROM_PC); 508 writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); 509 writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY); 510 writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 511 Dummy = readb(apbs[IndexCard].RamIO + VERS); 512 513#ifdef DEBUG 514 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard); 515 516 for (c = 0; c < sizeof(struct st_ram_io);) { 517 printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]); 518 519 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { 520 printk(" %2.2X", ((unsigned char *)st_loc)[c]); 521 } 522 } 523 524 printk("\nstruct mailbox follows:"); 525 526 for (c = 0; c < sizeof(struct mailbox);) { 527 printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]); 528 529 for (c++; c % 8 && c < sizeof(struct mailbox); c++) { 530 printk(" %2.2X", ((unsigned char *)mailbox)[c]); 531 } 532 } 533 printk("\n"); 534#endif 535 return (sizeof(struct st_ram_io) + sizeof(struct mailbox)); 536} 537 538static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr) 539{ 540 unsigned long flags; 541 unsigned int i; 542 unsigned char tmp; 543 int ret = 0; 544 DECLARE_WAITQUEUE(wait, current); 545#ifdef DEBUG 546 int loopcount=0; 547#endif 548 /* No need to ratelimit this. Only root can trigger it anyway */ 549 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { 550 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n", 551 count,sizeof(struct st_ram_io) + sizeof(struct mailbox)); 552 return -EINVAL; 553 } 554 555 while(1) { 556 /* Stick ourself on the wait queue */ 557 set_current_state(TASK_INTERRUPTIBLE); 558 add_wait_queue(&FlagSleepRec, &wait); 559 560 /* Scan each board, looking for one which has a packet for us */ 561 for (i=0; i < MAX_BOARD; i++) { 562 if (!apbs[i].RamIO) 563 continue; 564 spin_lock_irqsave(&apbs[i].mutex, flags); 565 566 tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY); 567 568 if (tmp == 2) { 569 struct st_ram_io st_loc; 570 struct mailbox mailbox; 571 572 /* Got a packet for us */ 573 memset(&st_loc, 0, sizeof(st_loc)); 574 ret = do_ac_read(i, buf, &st_loc, &mailbox); 575 spin_unlock_irqrestore(&apbs[i].mutex, flags); 576 set_current_state(TASK_RUNNING); 577 remove_wait_queue(&FlagSleepRec, &wait); 578 579 if (copy_to_user(buf, &st_loc, sizeof(st_loc))) 580 return -EFAULT; 581 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox))) 582 return -EFAULT; 583 return tmp; 584 } 585 586 if (tmp > 2) { 587 /* Got an error */ 588 Dummy = readb(apbs[i].RamIO + VERS); 589 590 spin_unlock_irqrestore(&apbs[i].mutex, flags); 591 set_current_state(TASK_RUNNING); 592 remove_wait_queue(&FlagSleepRec, &wait); 593 594 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n", 595 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); 596 DeviceErrorCount++; 597 return -EIO; 598 } 599 600 /* Nothing for us. Try the next board */ 601 Dummy = readb(apbs[i].RamIO + VERS); 602 spin_unlock_irqrestore(&apbs[i].mutex, flags); 603 604 } /* per board */ 605 606 /* OK - No boards had data for us. Sleep now */ 607 608 schedule(); 609 remove_wait_queue(&FlagSleepRec, &wait); 610 611 if (signal_pending(current)) 612 return -EINTR; 613 614#ifdef DEBUG 615 if (loopcount++ > 2) { 616 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount); 617 } 618#endif 619 } 620} 621 622static irqreturn_t ac_interrupt(int vec, void *dev_instance) 623{ 624 unsigned int i; 625 unsigned int FlagInt; 626 unsigned int LoopCount; 627 int handled = 0; 628 629 // printk("Applicom interrupt on IRQ %d occurred\n", vec); 630 631 LoopCount = 0; 632 633 do { 634 FlagInt = 0; 635 for (i = 0; i < MAX_BOARD; i++) { 636 637 /* Skip if this board doesn't exist */ 638 if (!apbs[i].RamIO) 639 continue; 640 641 spin_lock(&apbs[i].mutex); 642 643 /* Skip if this board doesn't want attention */ 644 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) { 645 spin_unlock(&apbs[i].mutex); 646 continue; 647 } 648 649 handled = 1; 650 FlagInt = 1; 651 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC); 652 653 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) { 654 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n", 655 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); 656 DeviceErrorCount++; 657 } 658 659 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && 660 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) { 661 662 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n", 663 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY)); 664 DeviceErrorCount++; 665 } 666 667 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */ 668 if (waitqueue_active(&FlagSleepRec)) { 669 wake_up_interruptible(&FlagSleepRec); 670 } 671 } 672 673 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */ 674 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */ 675 wake_up_interruptible(&apbs[i].FlagSleepSend); 676 } 677 } 678 Dummy = readb(apbs[i].RamIO + VERS); 679 680 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) { 681 /* There's another int waiting on this card */ 682 spin_unlock(&apbs[i].mutex); 683 i--; 684 } else { 685 spin_unlock(&apbs[i].mutex); 686 } 687 } 688 if (FlagInt) 689 LoopCount = 0; 690 else 691 LoopCount++; 692 } while(LoopCount < 2); 693 return IRQ_RETVAL(handled); 694} 695 696 697 698static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 699 700{ /* @ ADG ou ATO selon le cas */ 701 int i; 702 unsigned char IndexCard; 703 void __iomem *pmem; 704 int ret = 0; 705 static int warncount = 10; 706 volatile unsigned char byte_reset_it; 707 struct st_ram_io *adgl; 708 void __user *argp = (void __user *)arg; 709 710 /* In general, the device is only openable by root anyway, so we're not 711 particularly concerned that bogus ioctls can flood the console. */ 712 713 adgl = memdup_user(argp, sizeof(struct st_ram_io)); 714 if (IS_ERR(adgl)) 715 return PTR_ERR(adgl); 716 717 mutex_lock(&ac_mutex); 718 IndexCard = adgl->num_card-1; 719 720 if (cmd != 6 && IndexCard >= MAX_BOARD) 721 goto err; 722 IndexCard = array_index_nospec(IndexCard, MAX_BOARD); 723 724 if (cmd != 6 && !apbs[IndexCard].RamIO) 725 goto err; 726 727 switch (cmd) { 728 729 case 0: 730 pmem = apbs[IndexCard].RamIO; 731 for (i = 0; i < sizeof(struct st_ram_io); i++) 732 ((unsigned char *)adgl)[i]=readb(pmem++); 733 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) 734 ret = -EFAULT; 735 break; 736 case 1: 737 pmem = apbs[IndexCard].RamIO + CONF_END_TEST; 738 for (i = 0; i < 4; i++) 739 adgl->conf_end_test[i] = readb(pmem++); 740 for (i = 0; i < 2; i++) 741 adgl->error_code[i] = readb(pmem++); 742 for (i = 0; i < 4; i++) 743 adgl->parameter_error[i] = readb(pmem++); 744 pmem = apbs[IndexCard].RamIO + VERS; 745 adgl->vers = readb(pmem); 746 pmem = apbs[IndexCard].RamIO + TYPE_CARD; 747 for (i = 0; i < 20; i++) 748 adgl->reserv1[i] = readb(pmem++); 749 *(int *)&adgl->reserv1[20] = 750 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + 751 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + 752 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) ); 753 754 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) 755 ret = -EFAULT; 756 break; 757 case 2: 758 pmem = apbs[IndexCard].RamIO + CONF_END_TEST; 759 for (i = 0; i < 10; i++) 760 writeb(0xff, pmem++); 761 writeb(adgl->data_from_pc_ready, 762 apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 763 764 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 765 766 for (i = 0; i < MAX_BOARD; i++) { 767 if (apbs[i].RamIO) { 768 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC); 769 } 770 } 771 break; 772 case 3: 773 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC; 774 writeb(adgl->tic_des_from_pc, pmem); 775 break; 776 case 4: 777 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC; 778 adgl->tic_owner_to_pc = readb(pmem++); 779 adgl->numcard_owner_to_pc = readb(pmem); 780 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io))) 781 ret = -EFAULT; 782 break; 783 case 5: 784 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); 785 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); 786 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); 787 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 788 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 789 break; 790 case 6: 791 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n"); 792 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards); 793 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem); 794 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq); 795 for (i = 0; i < MAX_BOARD; i++) { 796 int serial; 797 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; 798 799 if (!apbs[i].RamIO) 800 continue; 801 802 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) 803 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); 804 boardname[serial] = 0; 805 806 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s", 807 i+1, 808 (int)(readb(apbs[i].RamIO + VERS) >> 4), 809 (int)(readb(apbs[i].RamIO + VERS) & 0xF), 810 boardname); 811 812 813 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 814 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 815 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); 816 817 if (serial != 0) 818 printk(" S/N %d\n", serial); 819 else 820 printk("\n"); 821 } 822 if (DeviceErrorCount != 0) 823 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount); 824 if (ReadErrorCount != 0) 825 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount); 826 if (WriteErrorCount != 0) 827 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount); 828 if (waitqueue_active(&FlagSleepRec)) 829 printk(KERN_INFO "Process in read pending\n"); 830 for (i = 0; i < MAX_BOARD; i++) { 831 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend)) 832 printk(KERN_INFO "Process in write pending board %d\n",i+1); 833 } 834 break; 835 default: 836 ret = -ENOTTY; 837 break; 838 } 839 Dummy = readb(apbs[IndexCard].RamIO + VERS); 840 kfree(adgl); 841 mutex_unlock(&ac_mutex); 842 return ret; 843 844err: 845 if (warncount) { 846 pr_warn("APPLICOM driver IOCTL, bad board number %d\n", 847 (int)IndexCard + 1); 848 warncount--; 849 } 850 kfree(adgl); 851 mutex_unlock(&ac_mutex); 852 return -EINVAL; 853 854} 855 856