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 64 static DEFINE_MUTEX(ac_mutex); 65 static char *applicom_pci_devnames[] = { 66 "PCI board", 67 "PCI2000IBS / PCI2000CAN", 68 "PCI2000PFB" 69 }; 70 71 static 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 }; 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 MODULE_ALIAS_MISCDEV(AC_MINOR); 83 84 static 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 92 static unsigned int irq; /* interrupt number IRQ */ 93 static unsigned long mem; /* physical segment of board */ 94 95 module_param_hw(irq, uint, irq, 0); 96 MODULE_PARM_DESC(irq, "IRQ of the Applicom board"); 97 module_param_hw(mem, ulong, iomem, 0); 98 MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board"); 99 100 static unsigned int numboards; /* number of installed boards */ 101 static volatile unsigned char Dummy; 102 static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec); 103 static unsigned int WriteErrorCount; /* number of write error */ 104 static unsigned int ReadErrorCount; /* number of read error */ 105 static unsigned int DeviceErrorCount; /* number of device error */ 106 107 static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *); 108 static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *); 109 static long ac_ioctl(struct file *, unsigned int, unsigned long); 110 static irqreturn_t ac_interrupt(int, void *); 111 112 static const struct file_operations ac_fops = { 113 .owner = THIS_MODULE, 114 .read = ac_read, 115 .write = ac_write, 116 .unlocked_ioctl = ac_ioctl, 117 }; 118 119 static struct miscdevice ac_miscdev = { 120 AC_MINOR, 121 "ac", 122 &ac_fops 123 }; 124 125 static int dummy; /* dev_id for request_irq() */ 126 127 static int ac_register_board(unsigned long physloc, void __iomem *loc, 128 unsigned char boardno) 129 { 130 volatile unsigned char byte_reset_it; 131 132 if((readb(loc + CONF_END_TEST) != 0x00) || 133 (readb(loc + CONF_END_TEST + 1) != 0x55) || 134 (readb(loc + CONF_END_TEST + 2) != 0xAA) || 135 (readb(loc + CONF_END_TEST + 3) != 0xFF)) 136 return 0; 137 138 if (!boardno) 139 boardno = readb(loc + NUMCARD_OWNER_TO_PC); 140 141 if (!boardno || boardno > MAX_BOARD) { 142 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n", 143 boardno, physloc, MAX_BOARD); 144 return 0; 145 } 146 147 if (apbs[boardno - 1].RamIO) { 148 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n", 149 boardno, physloc, boardno, apbs[boardno-1].PhysIO); 150 return 0; 151 } 152 153 boardno--; 154 155 apbs[boardno].PhysIO = physloc; 156 apbs[boardno].RamIO = loc; 157 init_waitqueue_head(&apbs[boardno].FlagSleepSend); 158 spin_lock_init(&apbs[boardno].mutex); 159 byte_reset_it = readb(loc + RAM_IT_TO_PC); 160 161 numboards++; 162 return boardno + 1; 163 } 164 165 static void __exit applicom_exit(void) 166 { 167 unsigned int i; 168 169 misc_deregister(&ac_miscdev); 170 171 for (i = 0; i < MAX_BOARD; i++) { 172 173 if (!apbs[i].RamIO) 174 continue; 175 176 if (apbs[i].irq) 177 free_irq(apbs[i].irq, &dummy); 178 179 iounmap(apbs[i].RamIO); 180 } 181 } 182 183 static int __init applicom_init(void) 184 { 185 int i, numisa = 0; 186 struct pci_dev *dev = NULL; 187 void __iomem *RamIO; 188 int boardno, ret; 189 190 printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n"); 191 192 /* No mem and irq given - check for a PCI card */ 193 194 while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) { 195 196 if (!pci_match_id(applicom_pci_tbl, dev)) 197 continue; 198 199 if (pci_enable_device(dev)) { 200 pci_dev_put(dev); 201 return -EIO; 202 } 203 204 RamIO = ioremap(pci_resource_start(dev, 0), LEN_RAM_IO); 205 206 if (!RamIO) { 207 printk(KERN_INFO "ac.o: Failed to ioremap PCI memory " 208 "space at 0x%llx\n", 209 (unsigned long long)pci_resource_start(dev, 0)); 210 pci_disable_device(dev); 211 pci_dev_put(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(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; 339 340 out: 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 } 350 351 module_init(applicom_init); 352 module_exit(applicom_exit); 353 354 355 static 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 (IndexCard >= MAX_BOARD) 390 return -EINVAL; 391 IndexCard = array_index_nospec(IndexCard, MAX_BOARD); 392 393 if (!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 memset(&st_loc, 0, sizeof(st_loc)); 573 ret = do_ac_read(i, buf, &st_loc, &mailbox); 574 spin_unlock_irqrestore(&apbs[i].mutex, flags); 575 set_current_state(TASK_RUNNING); 576 remove_wait_queue(&FlagSleepRec, &wait); 577 578 if (copy_to_user(buf, &st_loc, sizeof(st_loc))) 579 return -EFAULT; 580 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox))) 581 return -EFAULT; 582 return tmp; 583 } 584 585 if (tmp > 2) { 586 /* Got an error */ 587 Dummy = readb(apbs[i].RamIO + VERS); 588 589 spin_unlock_irqrestore(&apbs[i].mutex, flags); 590 set_current_state(TASK_RUNNING); 591 remove_wait_queue(&FlagSleepRec, &wait); 592 593 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n", 594 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); 595 DeviceErrorCount++; 596 return -EIO; 597 } 598 599 /* Nothing for us. Try the next board */ 600 Dummy = readb(apbs[i].RamIO + VERS); 601 spin_unlock_irqrestore(&apbs[i].mutex, flags); 602 603 } /* per board */ 604 605 /* OK - No boards had data for us. Sleep now */ 606 607 schedule(); 608 remove_wait_queue(&FlagSleepRec, &wait); 609 610 if (signal_pending(current)) 611 return -EINTR; 612 613 #ifdef DEBUG 614 if (loopcount++ > 2) { 615 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount); 616 } 617 #endif 618 } 619 } 620 621 static irqreturn_t ac_interrupt(int vec, void *dev_instance) 622 { 623 unsigned int i; 624 unsigned int FlagInt; 625 unsigned int LoopCount; 626 int handled = 0; 627 628 // printk("Applicom interrupt on IRQ %d occurred\n", vec); 629 630 LoopCount = 0; 631 632 do { 633 FlagInt = 0; 634 for (i = 0; i < MAX_BOARD; i++) { 635 636 /* Skip if this board doesn't exist */ 637 if (!apbs[i].RamIO) 638 continue; 639 640 spin_lock(&apbs[i].mutex); 641 642 /* Skip if this board doesn't want attention */ 643 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) { 644 spin_unlock(&apbs[i].mutex); 645 continue; 646 } 647 648 handled = 1; 649 FlagInt = 1; 650 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC); 651 652 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) { 653 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n", 654 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); 655 DeviceErrorCount++; 656 } 657 658 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && 659 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) { 660 661 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n", 662 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY)); 663 DeviceErrorCount++; 664 } 665 666 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */ 667 if (waitqueue_active(&FlagSleepRec)) { 668 wake_up_interruptible(&FlagSleepRec); 669 } 670 } 671 672 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */ 673 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */ 674 wake_up_interruptible(&apbs[i].FlagSleepSend); 675 } 676 } 677 Dummy = readb(apbs[i].RamIO + VERS); 678 679 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) { 680 /* There's another int waiting on this card */ 681 spin_unlock(&apbs[i].mutex); 682 i--; 683 } else { 684 spin_unlock(&apbs[i].mutex); 685 } 686 } 687 if (FlagInt) 688 LoopCount = 0; 689 else 690 LoopCount++; 691 } while(LoopCount < 2); 692 return IRQ_RETVAL(handled); 693 } 694 695 696 697 static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 698 699 { /* @ ADG ou ATO selon le cas */ 700 int i; 701 unsigned char IndexCard; 702 void __iomem *pmem; 703 int ret = 0; 704 static int warncount = 10; 705 volatile unsigned char byte_reset_it; 706 struct st_ram_io *adgl; 707 void __user *argp = (void __user *)arg; 708 709 /* In general, the device is only openable by root anyway, so we're not 710 particularly concerned that bogus ioctls can flood the console. */ 711 712 adgl = memdup_user(argp, sizeof(struct st_ram_io)); 713 if (IS_ERR(adgl)) 714 return PTR_ERR(adgl); 715 716 mutex_lock(&ac_mutex); 717 IndexCard = adgl->num_card-1; 718 719 if (cmd != 6 && IndexCard >= MAX_BOARD) 720 goto err; 721 IndexCard = array_index_nospec(IndexCard, MAX_BOARD); 722 723 if (cmd != 6 && !apbs[IndexCard].RamIO) 724 goto err; 725 726 switch (cmd) { 727 728 case 0: 729 pmem = apbs[IndexCard].RamIO; 730 for (i = 0; i < sizeof(struct st_ram_io); i++) 731 ((unsigned char *)adgl)[i]=readb(pmem++); 732 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) 733 ret = -EFAULT; 734 break; 735 case 1: 736 pmem = apbs[IndexCard].RamIO + CONF_END_TEST; 737 for (i = 0; i < 4; i++) 738 adgl->conf_end_test[i] = readb(pmem++); 739 for (i = 0; i < 2; i++) 740 adgl->error_code[i] = readb(pmem++); 741 for (i = 0; i < 4; i++) 742 adgl->parameter_error[i] = readb(pmem++); 743 pmem = apbs[IndexCard].RamIO + VERS; 744 adgl->vers = readb(pmem); 745 pmem = apbs[IndexCard].RamIO + TYPE_CARD; 746 for (i = 0; i < 20; i++) 747 adgl->reserv1[i] = readb(pmem++); 748 *(int *)&adgl->reserv1[20] = 749 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + 750 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + 751 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) ); 752 753 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) 754 ret = -EFAULT; 755 break; 756 case 2: 757 pmem = apbs[IndexCard].RamIO + CONF_END_TEST; 758 for (i = 0; i < 10; i++) 759 writeb(0xff, pmem++); 760 writeb(adgl->data_from_pc_ready, 761 apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 762 763 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 764 765 for (i = 0; i < MAX_BOARD; i++) { 766 if (apbs[i].RamIO) { 767 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC); 768 } 769 } 770 break; 771 case 3: 772 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC; 773 writeb(adgl->tic_des_from_pc, pmem); 774 break; 775 case 4: 776 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC; 777 adgl->tic_owner_to_pc = readb(pmem++); 778 adgl->numcard_owner_to_pc = readb(pmem); 779 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io))) 780 ret = -EFAULT; 781 break; 782 case 5: 783 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); 784 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); 785 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); 786 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 787 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 788 break; 789 case 6: 790 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n"); 791 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards); 792 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem); 793 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq); 794 for (i = 0; i < MAX_BOARD; i++) { 795 int serial; 796 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; 797 798 if (!apbs[i].RamIO) 799 continue; 800 801 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) 802 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); 803 boardname[serial] = 0; 804 805 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s", 806 i+1, 807 (int)(readb(apbs[i].RamIO + VERS) >> 4), 808 (int)(readb(apbs[i].RamIO + VERS) & 0xF), 809 boardname); 810 811 812 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 813 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 814 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); 815 816 if (serial != 0) 817 printk(" S/N %d\n", serial); 818 else 819 printk("\n"); 820 } 821 if (DeviceErrorCount != 0) 822 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount); 823 if (ReadErrorCount != 0) 824 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount); 825 if (WriteErrorCount != 0) 826 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount); 827 if (waitqueue_active(&FlagSleepRec)) 828 printk(KERN_INFO "Process in read pending\n"); 829 for (i = 0; i < MAX_BOARD; i++) { 830 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend)) 831 printk(KERN_INFO "Process in write pending board %d\n",i+1); 832 } 833 break; 834 default: 835 ret = -ENOTTY; 836 break; 837 } 838 Dummy = readb(apbs[IndexCard].RamIO + VERS); 839 kfree(adgl); 840 mutex_unlock(&ac_mutex); 841 return ret; 842 843 err: 844 if (warncount) { 845 pr_warn("APPLICOM driver IOCTL, bad board number %d\n", 846 (int)IndexCard + 1); 847 warncount--; 848 } 849 kfree(adgl); 850 mutex_unlock(&ac_mutex); 851 return -EINVAL; 852 853 } 854 855