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1// SPDX-License-Identifier: GPL-2.0-only2/* 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 because46 the board doesn't correctly handle word accesses - only47 bytes. 48*/49 50 51#undef DEBUG52 53#define MAX_BOARD 8 /* maximum of pc board possible */54#define MAX_ISA_BOARD 455#define LEN_RAM_IO 0x80056 57#ifndef PCI_VENDOR_ID_APPLICOM58#define PCI_VENDOR_ID_APPLICOM 0x138959#define PCI_DEVICE_ID_APPLICOM_PCIGENERIC 0x000160#define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x000261#define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x000362#endif63 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 .read = ac_read,115 .write = ac_write,116 .unlocked_ioctl = ac_ioctl,117};118 119static struct miscdevice ac_miscdev = {120 AC_MINOR,121 "ac",122 &ac_fops123};124 125static int dummy; /* dev_id for request_irq() */126 127static 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 165static 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 183static 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 else282 apbs[boardno - 1].irq = irq;283 }284 else285 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 else332 printk("\n");333 }334 return 0;335 }336 337 else338 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 DEBUG364 int c;365#endif366 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 DEBUG397 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#endif421 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 then461 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 483static 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 DEBUG489 int c;490#endif491 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 DEBUG513 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#endif534 return (sizeof(struct st_ram_io) + sizeof(struct mailbox));535}536 537static 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 DEBUG545 int loopcount=0;546#endif547 /* 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 DEBUG614 if (loopcount++ > 2) {615 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);616 }617#endif618 } 619}620 621static 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 else690 LoopCount++;691 } while(LoopCount < 2);692 return IRQ_RETVAL(handled);693}694 695 696 697static 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 not710 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 else819 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 843err: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