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 .llseek = no_llseek, 115 .read = ac_read, 116 .write = ac_write, 117 .unlocked_ioctl = ac_ioctl, 118 }; 119 120 static struct miscdevice ac_miscdev = { 121 AC_MINOR, 122 "ac", 123 &ac_fops 124 }; 125 126 static int dummy; /* dev_id for request_irq() */ 127 128 static 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 } 165 166 static 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 } 183 184 static 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 return -EIO; 202 203 RamIO = ioremap(pci_resource_start(dev, 0), LEN_RAM_IO); 204 205 if (!RamIO) { 206 printk(KERN_INFO "ac.o: Failed to ioremap PCI memory " 207 "space at 0x%llx\n", 208 (unsigned long long)pci_resource_start(dev, 0)); 209 pci_disable_device(dev); 210 return -EIO; 211 } 212 213 printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n", 214 applicom_pci_devnames[dev->device-1], 215 (unsigned long long)pci_resource_start(dev, 0), 216 dev->irq); 217 218 boardno = ac_register_board(pci_resource_start(dev, 0), 219 RamIO, 0); 220 if (!boardno) { 221 printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n"); 222 iounmap(RamIO); 223 pci_disable_device(dev); 224 continue; 225 } 226 227 if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) { 228 printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq); 229 iounmap(RamIO); 230 pci_disable_device(dev); 231 apbs[boardno - 1].RamIO = NULL; 232 continue; 233 } 234 235 /* Enable interrupts. */ 236 237 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC); 238 239 apbs[boardno - 1].irq = dev->irq; 240 } 241 242 /* Finished with PCI cards. If none registered, 243 * and there was no mem/irq specified, exit */ 244 245 if (!mem || !irq) { 246 if (numboards) 247 goto fin; 248 else { 249 printk(KERN_INFO "ac.o: No PCI boards found.\n"); 250 printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n"); 251 return -ENXIO; 252 } 253 } 254 255 /* Now try the specified ISA cards */ 256 257 for (i = 0; i < MAX_ISA_BOARD; i++) { 258 RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO); 259 260 if (!RamIO) { 261 printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1); 262 continue; 263 } 264 265 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i), 266 RamIO,i+1))) { 267 iounmap(RamIO); 268 continue; 269 } 270 271 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq); 272 273 if (!numisa) { 274 if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) { 275 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq); 276 iounmap(RamIO); 277 apbs[boardno - 1].RamIO = NULL; 278 } 279 else 280 apbs[boardno - 1].irq = irq; 281 } 282 else 283 apbs[boardno - 1].irq = 0; 284 285 numisa++; 286 } 287 288 if (!numisa) 289 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found " 290 "at mem 0x%lx\n", mem); 291 292 fin: 293 init_waitqueue_head(&FlagSleepRec); 294 295 WriteErrorCount = 0; 296 ReadErrorCount = 0; 297 DeviceErrorCount = 0; 298 299 if (numboards) { 300 ret = misc_register(&ac_miscdev); 301 if (ret) { 302 printk(KERN_WARNING "ac.o: Unable to register misc device\n"); 303 goto out; 304 } 305 for (i = 0; i < MAX_BOARD; i++) { 306 int serial; 307 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; 308 309 if (!apbs[i].RamIO) 310 continue; 311 312 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) 313 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); 314 315 boardname[serial] = 0; 316 317 318 printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d", 319 i+1, boardname, 320 (int)(readb(apbs[i].RamIO + VERS) >> 4), 321 (int)(readb(apbs[i].RamIO + VERS) & 0xF)); 322 323 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 324 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 325 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); 326 327 if (serial != 0) 328 printk(" S/N %d\n", serial); 329 else 330 printk("\n"); 331 } 332 return 0; 333 } 334 335 else 336 return -ENXIO; 337 338 out: 339 for (i = 0; i < MAX_BOARD; i++) { 340 if (!apbs[i].RamIO) 341 continue; 342 if (apbs[i].irq) 343 free_irq(apbs[i].irq, &dummy); 344 iounmap(apbs[i].RamIO); 345 } 346 return ret; 347 } 348 349 module_init(applicom_init); 350 module_exit(applicom_exit); 351 352 353 static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos) 354 { 355 unsigned int NumCard; /* Board number 1 -> 8 */ 356 unsigned int IndexCard; /* Index board number 0 -> 7 */ 357 unsigned char TicCard; /* Board TIC to send */ 358 unsigned long flags; /* Current priority */ 359 struct st_ram_io st_loc; 360 struct mailbox tmpmailbox; 361 #ifdef DEBUG 362 int c; 363 #endif 364 DECLARE_WAITQUEUE(wait, current); 365 366 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { 367 static int warncount = 5; 368 if (warncount) { 369 printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n", 370 count, sizeof(struct st_ram_io) + sizeof(struct mailbox)); 371 warncount--; 372 } 373 return -EINVAL; 374 } 375 376 if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io))) 377 return -EFAULT; 378 379 if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)], 380 sizeof(struct mailbox))) 381 return -EFAULT; 382 383 NumCard = st_loc.num_card; /* board number to send */ 384 TicCard = st_loc.tic_des_from_pc; /* tic number to send */ 385 IndexCard = NumCard - 1; 386 387 if (IndexCard >= MAX_BOARD) 388 return -EINVAL; 389 IndexCard = array_index_nospec(IndexCard, MAX_BOARD); 390 391 if (!apbs[IndexCard].RamIO) 392 return -EINVAL; 393 394 #ifdef DEBUG 395 printk("Write to applicom card #%d. struct st_ram_io follows:", 396 IndexCard+1); 397 398 for (c = 0; c < sizeof(struct st_ram_io);) { 399 400 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]); 401 402 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { 403 printk(" %2.2X", ((unsigned char *) &st_loc)[c]); 404 } 405 } 406 407 printk("\nstruct mailbox follows:"); 408 409 for (c = 0; c < sizeof(struct mailbox);) { 410 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]); 411 412 for (c++; c % 8 && c < sizeof(struct mailbox); c++) { 413 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]); 414 } 415 } 416 417 printk("\n"); 418 #endif 419 420 spin_lock_irqsave(&apbs[IndexCard].mutex, flags); 421 422 /* Test octet ready correct */ 423 if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { 424 Dummy = readb(apbs[IndexCard].RamIO + VERS); 425 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); 426 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n", 427 IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY)); 428 DeviceErrorCount++; 429 return -EIO; 430 } 431 432 /* Place ourselves on the wait queue */ 433 set_current_state(TASK_INTERRUPTIBLE); 434 add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); 435 436 /* Check whether the card is ready for us */ 437 while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) { 438 Dummy = readb(apbs[IndexCard].RamIO + VERS); 439 /* It's busy. Sleep. */ 440 441 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); 442 schedule(); 443 if (signal_pending(current)) { 444 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, 445 &wait); 446 return -EINTR; 447 } 448 spin_lock_irqsave(&apbs[IndexCard].mutex, flags); 449 set_current_state(TASK_INTERRUPTIBLE); 450 } 451 452 /* We may not have actually slept */ 453 set_current_state(TASK_RUNNING); 454 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); 455 456 writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 457 458 /* Which is best - lock down the pages with rawio and then 459 copy directly, or use bounce buffers? For now we do the latter 460 because it works with 2.2 still */ 461 { 462 unsigned char *from = (unsigned char *) &tmpmailbox; 463 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC; 464 int c; 465 466 for (c = 0; c < sizeof(struct mailbox); c++) 467 writeb(*(from++), to++); 468 } 469 470 writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC); 471 writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC); 472 writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC); 473 writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); 474 writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 475 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 476 Dummy = readb(apbs[IndexCard].RamIO + VERS); 477 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); 478 return 0; 479 } 480 481 static int do_ac_read(int IndexCard, char __user *buf, 482 struct st_ram_io *st_loc, struct mailbox *mailbox) 483 { 484 void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC; 485 unsigned char *to = (unsigned char *)mailbox; 486 #ifdef DEBUG 487 int c; 488 #endif 489 490 st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC); 491 st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); 492 493 494 { 495 int c; 496 497 for (c = 0; c < sizeof(struct mailbox); c++) 498 *(to++) = readb(from++); 499 } 500 writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); 501 writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC); 502 writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); 503 writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), 504 apbs[IndexCard].RamIO + TIC_ACK_FROM_PC); 505 writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); 506 writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY); 507 writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 508 Dummy = readb(apbs[IndexCard].RamIO + VERS); 509 510 #ifdef DEBUG 511 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard); 512 513 for (c = 0; c < sizeof(struct st_ram_io);) { 514 printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]); 515 516 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { 517 printk(" %2.2X", ((unsigned char *)st_loc)[c]); 518 } 519 } 520 521 printk("\nstruct mailbox follows:"); 522 523 for (c = 0; c < sizeof(struct mailbox);) { 524 printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]); 525 526 for (c++; c % 8 && c < sizeof(struct mailbox); c++) { 527 printk(" %2.2X", ((unsigned char *)mailbox)[c]); 528 } 529 } 530 printk("\n"); 531 #endif 532 return (sizeof(struct st_ram_io) + sizeof(struct mailbox)); 533 } 534 535 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr) 536 { 537 unsigned long flags; 538 unsigned int i; 539 unsigned char tmp; 540 int ret = 0; 541 DECLARE_WAITQUEUE(wait, current); 542 #ifdef DEBUG 543 int loopcount=0; 544 #endif 545 /* No need to ratelimit this. Only root can trigger it anyway */ 546 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { 547 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n", 548 count,sizeof(struct st_ram_io) + sizeof(struct mailbox)); 549 return -EINVAL; 550 } 551 552 while(1) { 553 /* Stick ourself on the wait queue */ 554 set_current_state(TASK_INTERRUPTIBLE); 555 add_wait_queue(&FlagSleepRec, &wait); 556 557 /* Scan each board, looking for one which has a packet for us */ 558 for (i=0; i < MAX_BOARD; i++) { 559 if (!apbs[i].RamIO) 560 continue; 561 spin_lock_irqsave(&apbs[i].mutex, flags); 562 563 tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY); 564 565 if (tmp == 2) { 566 struct st_ram_io st_loc; 567 struct mailbox mailbox; 568 569 /* Got a packet for us */ 570 memset(&st_loc, 0, sizeof(st_loc)); 571 ret = do_ac_read(i, buf, &st_loc, &mailbox); 572 spin_unlock_irqrestore(&apbs[i].mutex, flags); 573 set_current_state(TASK_RUNNING); 574 remove_wait_queue(&FlagSleepRec, &wait); 575 576 if (copy_to_user(buf, &st_loc, sizeof(st_loc))) 577 return -EFAULT; 578 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox))) 579 return -EFAULT; 580 return tmp; 581 } 582 583 if (tmp > 2) { 584 /* Got an error */ 585 Dummy = readb(apbs[i].RamIO + VERS); 586 587 spin_unlock_irqrestore(&apbs[i].mutex, flags); 588 set_current_state(TASK_RUNNING); 589 remove_wait_queue(&FlagSleepRec, &wait); 590 591 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n", 592 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); 593 DeviceErrorCount++; 594 return -EIO; 595 } 596 597 /* Nothing for us. Try the next board */ 598 Dummy = readb(apbs[i].RamIO + VERS); 599 spin_unlock_irqrestore(&apbs[i].mutex, flags); 600 601 } /* per board */ 602 603 /* OK - No boards had data for us. Sleep now */ 604 605 schedule(); 606 remove_wait_queue(&FlagSleepRec, &wait); 607 608 if (signal_pending(current)) 609 return -EINTR; 610 611 #ifdef DEBUG 612 if (loopcount++ > 2) { 613 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount); 614 } 615 #endif 616 } 617 } 618 619 static irqreturn_t ac_interrupt(int vec, void *dev_instance) 620 { 621 unsigned int i; 622 unsigned int FlagInt; 623 unsigned int LoopCount; 624 int handled = 0; 625 626 // printk("Applicom interrupt on IRQ %d occurred\n", vec); 627 628 LoopCount = 0; 629 630 do { 631 FlagInt = 0; 632 for (i = 0; i < MAX_BOARD; i++) { 633 634 /* Skip if this board doesn't exist */ 635 if (!apbs[i].RamIO) 636 continue; 637 638 spin_lock(&apbs[i].mutex); 639 640 /* Skip if this board doesn't want attention */ 641 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) { 642 spin_unlock(&apbs[i].mutex); 643 continue; 644 } 645 646 handled = 1; 647 FlagInt = 1; 648 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC); 649 650 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) { 651 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n", 652 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); 653 DeviceErrorCount++; 654 } 655 656 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && 657 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) { 658 659 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n", 660 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY)); 661 DeviceErrorCount++; 662 } 663 664 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */ 665 if (waitqueue_active(&FlagSleepRec)) { 666 wake_up_interruptible(&FlagSleepRec); 667 } 668 } 669 670 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */ 671 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */ 672 wake_up_interruptible(&apbs[i].FlagSleepSend); 673 } 674 } 675 Dummy = readb(apbs[i].RamIO + VERS); 676 677 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) { 678 /* There's another int waiting on this card */ 679 spin_unlock(&apbs[i].mutex); 680 i--; 681 } else { 682 spin_unlock(&apbs[i].mutex); 683 } 684 } 685 if (FlagInt) 686 LoopCount = 0; 687 else 688 LoopCount++; 689 } while(LoopCount < 2); 690 return IRQ_RETVAL(handled); 691 } 692 693 694 695 static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 696 697 { /* @ ADG ou ATO selon le cas */ 698 int i; 699 unsigned char IndexCard; 700 void __iomem *pmem; 701 int ret = 0; 702 static int warncount = 10; 703 volatile unsigned char byte_reset_it; 704 struct st_ram_io *adgl; 705 void __user *argp = (void __user *)arg; 706 707 /* In general, the device is only openable by root anyway, so we're not 708 particularly concerned that bogus ioctls can flood the console. */ 709 710 adgl = memdup_user(argp, sizeof(struct st_ram_io)); 711 if (IS_ERR(adgl)) 712 return PTR_ERR(adgl); 713 714 mutex_lock(&ac_mutex); 715 IndexCard = adgl->num_card-1; 716 717 if (cmd != 6 && IndexCard >= MAX_BOARD) 718 goto err; 719 IndexCard = array_index_nospec(IndexCard, MAX_BOARD); 720 721 if (cmd != 6 && !apbs[IndexCard].RamIO) 722 goto err; 723 724 switch (cmd) { 725 726 case 0: 727 pmem = apbs[IndexCard].RamIO; 728 for (i = 0; i < sizeof(struct st_ram_io); i++) 729 ((unsigned char *)adgl)[i]=readb(pmem++); 730 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) 731 ret = -EFAULT; 732 break; 733 case 1: 734 pmem = apbs[IndexCard].RamIO + CONF_END_TEST; 735 for (i = 0; i < 4; i++) 736 adgl->conf_end_test[i] = readb(pmem++); 737 for (i = 0; i < 2; i++) 738 adgl->error_code[i] = readb(pmem++); 739 for (i = 0; i < 4; i++) 740 adgl->parameter_error[i] = readb(pmem++); 741 pmem = apbs[IndexCard].RamIO + VERS; 742 adgl->vers = readb(pmem); 743 pmem = apbs[IndexCard].RamIO + TYPE_CARD; 744 for (i = 0; i < 20; i++) 745 adgl->reserv1[i] = readb(pmem++); 746 *(int *)&adgl->reserv1[20] = 747 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + 748 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + 749 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) ); 750 751 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) 752 ret = -EFAULT; 753 break; 754 case 2: 755 pmem = apbs[IndexCard].RamIO + CONF_END_TEST; 756 for (i = 0; i < 10; i++) 757 writeb(0xff, pmem++); 758 writeb(adgl->data_from_pc_ready, 759 apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 760 761 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 762 763 for (i = 0; i < MAX_BOARD; i++) { 764 if (apbs[i].RamIO) { 765 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC); 766 } 767 } 768 break; 769 case 3: 770 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC; 771 writeb(adgl->tic_des_from_pc, pmem); 772 break; 773 case 4: 774 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC; 775 adgl->tic_owner_to_pc = readb(pmem++); 776 adgl->numcard_owner_to_pc = readb(pmem); 777 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io))) 778 ret = -EFAULT; 779 break; 780 case 5: 781 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); 782 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); 783 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); 784 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 785 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 786 break; 787 case 6: 788 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n"); 789 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards); 790 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem); 791 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq); 792 for (i = 0; i < MAX_BOARD; i++) { 793 int serial; 794 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; 795 796 if (!apbs[i].RamIO) 797 continue; 798 799 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) 800 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); 801 boardname[serial] = 0; 802 803 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s", 804 i+1, 805 (int)(readb(apbs[i].RamIO + VERS) >> 4), 806 (int)(readb(apbs[i].RamIO + VERS) & 0xF), 807 boardname); 808 809 810 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 811 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 812 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); 813 814 if (serial != 0) 815 printk(" S/N %d\n", serial); 816 else 817 printk("\n"); 818 } 819 if (DeviceErrorCount != 0) 820 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount); 821 if (ReadErrorCount != 0) 822 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount); 823 if (WriteErrorCount != 0) 824 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount); 825 if (waitqueue_active(&FlagSleepRec)) 826 printk(KERN_INFO "Process in read pending\n"); 827 for (i = 0; i < MAX_BOARD; i++) { 828 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend)) 829 printk(KERN_INFO "Process in write pending board %d\n",i+1); 830 } 831 break; 832 default: 833 ret = -ENOTTY; 834 break; 835 } 836 Dummy = readb(apbs[IndexCard].RamIO + VERS); 837 kfree(adgl); 838 mutex_unlock(&ac_mutex); 839 return ret; 840 841 err: 842 if (warncount) { 843 pr_warn("APPLICOM driver IOCTL, bad board number %d\n", 844 (int)IndexCard + 1); 845 warncount--; 846 } 847 kfree(adgl); 848 mutex_unlock(&ac_mutex); 849 return -EINVAL; 850 851 } 852 853