drivers/char/applicom.c

   1 /* Derived from Applicom driver ac.c for SCO Unix                            */
   2 /* Ported by David Woodhouse, Axiom (Cambridge) Ltd.                         */
   3 /* dwmw2@infradead.org 30/8/98                                               */
   4 /* $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $                          */
   5 /* This module is for Linux 2.1 and 2.2 series kernels.                      */
   6 /*****************************************************************************/
   7 /* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt  */
   8 /* ceci pour reseter correctement apres une sortie sauvage                   */
   9 /* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption,     */
  10 /* LoopCount n'etait pas initialise a 0.                                     */
  11 /* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte   */
  12 /*           pour liberer le bus                                             */
  13 /* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */
  14 /* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter  */
  15 /* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3    */
  16 /* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes       */
  17 /* addresses de base des cartes, IOCTL 6 plus complet                         */
  18 /* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification  */
  19 /* de code autre que le texte V2.6.1 en V2.8.0                               */
  20 /*****************************************************************************/
  21
  22
  23 #include <linux/kernel.h>
  24 #include <linux/module.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/sched.h>
  27 #include <linux/slab.h>
  28 #include <linux/errno.h>
  29 #include <linux/smp_lock.h>
  30 #include <linux/miscdevice.h>
  31 #include <linux/pci.h>
  32 #include <linux/wait.h>
  33 #include <linux/init.h>
  34 #include <linux/fs.h>
  35
  36 #include <asm/io.h>
  37 #include <asm/uaccess.h>
  38
  39 #include "applicom.h"
  40
  41
  42 /* NOTE: We use for loops with {write,read}b() instead of
  43    memcpy_{from,to}io throughout this driver. This is because
  44    the board doesn't correctly handle word accesses - only
  45    bytes.
  46 */
  47
  48
  49 #undef DEBUG
  50
  51 #define MAX_BOARD 8             /* maximum of pc board possible */
  52 #define MAX_ISA_BOARD 4
  53 #define LEN_RAM_IO 0x800
  54 #define AC_MINOR 157
  55
  56 #ifndef PCI_VENDOR_ID_APPLICOM
  57 #define PCI_VENDOR_ID_APPLICOM                0x1389
  58 #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC     0x0001
  59 #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
  60 #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB     0x0003
  61 #endif
  62
  63 static char *applicom_pci_devnames[] = {
  64         "PCI board",
  65         "PCI2000IBS / PCI2000CAN",
  66         "PCI2000PFB"
  67 };
  68
  69 static struct pci_device_id applicom_pci_tbl[] = {
  70         { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) },
  71         { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) },
  72         { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) },
  73         { 0 }
  74 };
  75 MODULE_DEVICE_TABLE(pci, applicom_pci_tbl);
  76
  77 MODULE_AUTHOR("David Woodhouse & Applicom International");
  78 MODULE_DESCRIPTION("Driver for Applicom Profibus card");
  79 MODULE_LICENSE("GPL");
  80 MODULE_ALIAS_MISCDEV(AC_MINOR);
  81
  82 MODULE_SUPPORTED_DEVICE("ac");
  83
  84
  85 static struct applicom_board {
  86         unsigned long PhysIO;
  87         void __iomem *RamIO;
  88         wait_queue_head_t FlagSleepSend;
  89         long irq;
  90         spinlock_t mutex;
  91 } apbs[MAX_BOARD];
  92
  93 static unsigned int irq = 0;    /* interrupt number IRQ       */
  94 static unsigned long mem = 0;   /* physical segment of board  */
  95
  96 module_param(irq, uint, 0);
  97 MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
  98 module_param(mem, ulong, 0);
  99 MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
 100
 101 static unsigned int numboards;  /* number of installed boards */
 102 static volatile unsigned char Dummy;
 103 static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
 104 static unsigned int WriteErrorCount;    /* number of write error      */
 105 static unsigned int ReadErrorCount;     /* number of read error       */
 106 static unsigned int DeviceErrorCount;   /* number of device error     */
 107
 108 static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
 109 static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
 110 static long ac_ioctl(struct file *, unsigned int, unsigned long);
 111 static irqreturn_t ac_interrupt(int, void *);
 112
 113 static const struct file_operations ac_fops = {
 114         .owner = THIS_MODULE,
 115         .llseek = no_llseek,
 116         .read = ac_read,
 117         .write = ac_write,
 118         .unlocked_ioctl = ac_ioctl,
 119 };
 120
 121 static struct miscdevice ac_miscdev = {
 122         AC_MINOR,
 123         "ac",
 124         &ac_fops
 125 };
 126
 127 static int dummy;       /* dev_id for request_irq() */
 128
 129 static int ac_register_board(unsigned long physloc, void __iomem *loc,
 130                       unsigned char boardno)
 131 {
 132         volatile unsigned char byte_reset_it;
 133
 134         if((readb(loc + CONF_END_TEST)     != 0x00) ||
 135            (readb(loc + CONF_END_TEST + 1) != 0x55) ||
 136            (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
 137            (readb(loc + CONF_END_TEST + 3) != 0xFF))
 138                 return 0;
 139
 140         if (!boardno)
 141                 boardno = readb(loc + NUMCARD_OWNER_TO_PC);
 142
 143         if (!boardno || boardno > MAX_BOARD) {
 144                 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
 145                        boardno, physloc, MAX_BOARD);
 146                 return 0;
 147         }
 148
 149         if (apbs[boardno - 1].RamIO) {
 150                 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n",
 151                        boardno, physloc, boardno, apbs[boardno-1].PhysIO);
 152                 return 0;
 153         }
 154
 155         boardno--;
 156
 157         apbs[boardno].PhysIO = physloc;
 158         apbs[boardno].RamIO = loc;
 159         init_waitqueue_head(&apbs[boardno].FlagSleepSend);
 160         spin_lock_init(&apbs[boardno].mutex);
 161         byte_reset_it = readb(loc + RAM_IT_TO_PC);
 162
 163         numboards++;
 164         return boardno + 1;
 165 }
 166
 167 static void __exit applicom_exit(void)
 168 {
 169         unsigned int i;
 170
 171         misc_deregister(&ac_miscdev);
 172
 173         for (i = 0; i < MAX_BOARD; i++) {
 174
 175                 if (!apbs[i].RamIO)
 176                         continue;
 177
 178                 if (apbs[i].irq)
 179                         free_irq(apbs[i].irq, &dummy);
 180
 181                 iounmap(apbs[i].RamIO);
 182         }
 183 }
 184
 185 static int __init applicom_init(void)
 186 {
 187         int i, numisa = 0;
 188         struct pci_dev *dev = NULL;
 189         void __iomem *RamIO;
 190         int boardno, ret;
 191
 192         printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
 193
 194         /* No mem and irq given - check for a PCI card */
 195
 196         while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
 197
 198                 if (!pci_match_id(applicom_pci_tbl, dev))
 199                         continue;
 200
 201                 if (pci_enable_device(dev))
 202                         return -EIO;
 203
 204                 RamIO = ioremap_nocache(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                         return -EIO;
 212                 }
 213
 214                 printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n",
 215                        applicom_pci_devnames[dev->device-1],
 216                            (unsigned long long)pci_resource_start(dev, 0),
 217                        dev->irq);
 218
 219                 boardno = ac_register_board(pci_resource_start(dev, 0),
 220                                 RamIO, 0);
 221                 if (!boardno) {
 222                         printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
 223                         iounmap(RamIO);
 224                         pci_disable_device(dev);
 225                         continue;
 226                 }
 227
 228                 if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) {
 229                         printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
 230                         iounmap(RamIO);
 231                         pci_disable_device(dev);
 232                         apbs[boardno - 1].RamIO = NULL;
 233                         continue;
 234                 }
 235
 236                 /* Enable interrupts. */
 237
 238                 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
 239
 240                 apbs[boardno - 1].irq = dev->irq;
 241         }
 242
 243         /* Finished with PCI cards. If none registered,
 244          * and there was no mem/irq specified, exit */
 245
 246         if (!mem || !irq) {
 247                 if (numboards)
 248                         goto fin;
 249                 else {
 250                         printk(KERN_INFO "ac.o: No PCI boards found.\n");
 251                         printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
 252                         return -ENXIO;
 253                 }
 254         }
 255
 256         /* Now try the specified ISA cards */
 257
 258         for (i = 0; i < MAX_ISA_BOARD; i++) {
 259                 RamIO = ioremap_nocache(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
 260
 261                 if (!RamIO) {
 262                         printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
 263                         continue;
 264                 }
 265
 266                 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
 267                                                   RamIO,i+1))) {
 268                         iounmap(RamIO);
 269                         continue;
 270                 }
 271
 272                 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
 273
 274                 if (!numisa) {
 275                         if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) {
 276                                 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
 277                                 iounmap(RamIO);
 278                                 apbs[boardno - 1].RamIO = NULL;
 279                         }
 280                         else
 281                                 apbs[boardno - 1].irq = irq;
 282                 }
 283                 else
 284                         apbs[boardno - 1].irq = 0;
 285
 286                 numisa++;
 287         }
 288
 289         if (!numisa)
 290                 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
 291                                 "at mem 0x%lx\n", mem);
 292
 293  fin:
 294         init_waitqueue_head(&FlagSleepRec);
 295
 296         WriteErrorCount = 0;
 297         ReadErrorCount = 0;
 298         DeviceErrorCount = 0;
 299
 300         if (numboards) {
 301                 ret = misc_register(&ac_miscdev);
 302                 if (ret) {
 303                         printk(KERN_WARNING "ac.o: Unable to register misc device\n");
 304                         goto out;
 305                 }
 306                 for (i = 0; i < MAX_BOARD; i++) {
 307                         int serial;
 308                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
 309
 310                         if (!apbs[i].RamIO)
 311                                 continue;
 312
 313                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
 314                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
 315
 316                         boardname[serial] = 0;
 317
 318
 319                         printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
 320                                i+1, boardname,
 321                                (int)(readb(apbs[i].RamIO + VERS) >> 4),
 322                                (int)(readb(apbs[i].RamIO + VERS) & 0xF));
 323
 324                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
 325                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
 326                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
 327
 328                         if (serial != 0)
 329                                 printk(" S/N %d\n", serial);
 330                         else
 331                                 printk("\n");
 332                 }
 333                 return 0;
 334         }
 335
 336         else
 337                 return -ENXIO;
 338
 339 out:
 340         for (i = 0; i < MAX_BOARD; i++) {
 341                 if (!apbs[i].RamIO)
 342                         continue;
 343                 if (apbs[i].irq)
 344                         free_irq(apbs[i].irq, &dummy);
 345                 iounmap(apbs[i].RamIO);
 346         }
 347         pci_disable_device(dev);
 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((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
 390                 return -EINVAL;
 391
 392 #ifdef DEBUG
 393         printk("Write to applicom card #%d. struct st_ram_io follows:",
 394                IndexCard+1);
 395
 396                 for (c = 0; c < sizeof(struct st_ram_io);) {
 397
 398                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
 399
 400                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
 401                                 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
 402                         }
 403                 }
 404
 405                 printk("\nstruct mailbox follows:");
 406
 407                 for (c = 0; c < sizeof(struct mailbox);) {
 408                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
 409
 410                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
 411                                 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
 412                         }
 413                 }
 414
 415                 printk("\n");
 416 #endif
 417
 418         spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
 419
 420         /* Test octet ready correct */
 421         if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) {
 422                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
 423                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 424                 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
 425                        IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
 426                 DeviceErrorCount++;
 427                 return -EIO;
 428         }
 429
 430         /* Place ourselves on the wait queue */
 431         set_current_state(TASK_INTERRUPTIBLE);
 432         add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
 433
 434         /* Check whether the card is ready for us */
 435         while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
 436                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
 437                 /* It's busy. Sleep. */
 438
 439                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 440                 schedule();
 441                 if (signal_pending(current)) {
 442                         remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
 443                                           &wait);
 444                         return -EINTR;
 445                 }
 446                 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
 447                 set_current_state(TASK_INTERRUPTIBLE);
 448         }
 449
 450         /* We may not have actually slept */
 451         set_current_state(TASK_RUNNING);
 452         remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
 453
 454         writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 455
 456         /* Which is best - lock down the pages with rawio and then
 457            copy directly, or use bounce buffers? For now we do the latter
 458            because it works with 2.2 still */
 459         {
 460                 unsigned char *from = (unsigned char *) &tmpmailbox;
 461                 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
 462                 int c;
 463
 464                 for (c = 0; c < sizeof(struct mailbox); c++)
 465                         writeb(*(from++), to++);
 466         }
 467
 468         writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
 469         writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
 470         writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
 471         writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
 472         writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 473         writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 474         Dummy = readb(apbs[IndexCard].RamIO + VERS);
 475         spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 476         return 0;
 477 }
 478
 479 static int do_ac_read(int IndexCard, char __user *buf,
 480                 struct st_ram_io *st_loc, struct mailbox *mailbox)
 481 {
 482         void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
 483         unsigned char *to = (unsigned char *)mailbox;
 484 #ifdef DEBUG
 485         int c;
 486 #endif
 487
 488         st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
 489         st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
 490
 491
 492         {
 493                 int c;
 494
 495                 for (c = 0; c < sizeof(struct mailbox); c++)
 496                         *(to++) = readb(from++);
 497         }
 498         writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
 499         writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
 500         writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
 501         writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC),
 502                apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
 503         writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
 504         writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
 505         writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 506         Dummy = readb(apbs[IndexCard].RamIO + VERS);
 507
 508 #ifdef DEBUG
 509                 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
 510
 511                 for (c = 0; c < sizeof(struct st_ram_io);) {
 512                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
 513
 514                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
 515                                 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
 516                         }
 517                 }
 518
 519                 printk("\nstruct mailbox follows:");
 520
 521                 for (c = 0; c < sizeof(struct mailbox);) {
 522                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
 523
 524                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
 525                                 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
 526                         }
 527                 }
 528                 printk("\n");
 529 #endif
 530         return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
 531 }
 532
 533 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
 534 {
 535         unsigned long flags;
 536         unsigned int i;
 537         unsigned char tmp;
 538         int ret = 0;
 539         DECLARE_WAITQUEUE(wait, current);
 540 #ifdef DEBUG
 541         int loopcount=0;
 542 #endif
 543         /* No need to ratelimit this. Only root can trigger it anyway */
 544         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
 545                 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
 546                         count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
 547                 return -EINVAL;
 548         }
 549
 550         while(1) {
 551                 /* Stick ourself on the wait queue */
 552                 set_current_state(TASK_INTERRUPTIBLE);
 553                 add_wait_queue(&FlagSleepRec, &wait);
 554
 555                 /* Scan each board, looking for one which has a packet for us */
 556                 for (i=0; i < MAX_BOARD; i++) {
 557                         if (!apbs[i].RamIO)
 558                                 continue;
 559                         spin_lock_irqsave(&apbs[i].mutex, flags);
 560
 561                         tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
 562
 563                         if (tmp == 2) {
 564                                 struct st_ram_io st_loc;
 565                                 struct mailbox mailbox;
 566
 567                                 /* Got a packet for us */
 568                                 ret = do_ac_read(i, buf, &st_loc, &mailbox);
 569                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
 570                                 set_current_state(TASK_RUNNING);
 571                                 remove_wait_queue(&FlagSleepRec, &wait);
 572
 573                                 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
 574                                         return -EFAULT;
 575                                 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
 576                                         return -EFAULT;
 577                                 return tmp;
 578                         }
 579
 580                         if (tmp > 2) {
 581                                 /* Got an error */
 582                                 Dummy = readb(apbs[i].RamIO + VERS);
 583
 584                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
 585                                 set_current_state(TASK_RUNNING);
 586                                 remove_wait_queue(&FlagSleepRec, &wait);
 587
 588                                 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
 589                                        i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
 590                                 DeviceErrorCount++;
 591                                 return -EIO;
 592                         }
 593
 594                         /* Nothing for us. Try the next board */
 595                         Dummy = readb(apbs[i].RamIO + VERS);
 596                         spin_unlock_irqrestore(&apbs[i].mutex, flags);
 597
 598                 } /* per board */
 599
 600                 /* OK - No boards had data for us. Sleep now */
 601
 602                 schedule();
 603                 remove_wait_queue(&FlagSleepRec, &wait);
 604
 605                 if (signal_pending(current))
 606                         return -EINTR;
 607
 608 #ifdef DEBUG
 609                 if (loopcount++ > 2) {
 610                         printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
 611                 }
 612 #endif
 613         }
 614 }
 615
 616 static irqreturn_t ac_interrupt(int vec, void *dev_instance)
 617 {
 618         unsigned int i;
 619         unsigned int FlagInt;
 620         unsigned int LoopCount;
 621         int handled = 0;
 622
 623         //    printk("Applicom interrupt on IRQ %d occurred\n", vec);
 624
 625         LoopCount = 0;
 626
 627         do {
 628                 FlagInt = 0;
 629                 for (i = 0; i < MAX_BOARD; i++) {
 630
 631                         /* Skip if this board doesn't exist */
 632                         if (!apbs[i].RamIO)
 633                                 continue;
 634
 635                         spin_lock(&apbs[i].mutex);
 636
 637                         /* Skip if this board doesn't want attention */
 638                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
 639                                 spin_unlock(&apbs[i].mutex);
 640                                 continue;
 641                         }
 642
 643                         handled = 1;
 644                         FlagInt = 1;
 645                         writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
 646
 647                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
 648                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
 649                                        i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
 650                                 DeviceErrorCount++;
 651                         }
 652
 653                         if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) &&
 654                            (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
 655
 656                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
 657                                        i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
 658                                 DeviceErrorCount++;
 659                         }
 660
 661                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) {     /* mailbox sent by the card ?   */
 662                                 if (waitqueue_active(&FlagSleepRec)) {
 663                                 wake_up_interruptible(&FlagSleepRec);
 664                         }
 665                         }
 666
 667                         if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) {   /* ram i/o free for write by pc ? */
 668                                 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ?    */
 669                                         wake_up_interruptible(&apbs[i].FlagSleepSend);
 670                                 }
 671                         }
 672                         Dummy = readb(apbs[i].RamIO + VERS);
 673
 674                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
 675                                 /* There's another int waiting on this card */
 676                                 spin_unlock(&apbs[i].mutex);
 677                                 i--;
 678                         } else {
 679                                 spin_unlock(&apbs[i].mutex);
 680                         }
 681                 }
 682                 if (FlagInt)
 683                         LoopCount = 0;
 684                 else
 685                         LoopCount++;
 686         } while(LoopCount < 2);
 687         return IRQ_RETVAL(handled);
 688 }
 689
 690
 691
 692 static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 693
 694 {                               /* @ ADG ou ATO selon le cas */
 695         int i;
 696         unsigned char IndexCard;
 697         void __iomem *pmem;
 698         int ret = 0;
 699         volatile unsigned char byte_reset_it;
 700         struct st_ram_io *adgl;
 701         void __user *argp = (void __user *)arg;
 702
 703         /* In general, the device is only openable by root anyway, so we're not
 704            particularly concerned that bogus ioctls can flood the console. */
 705
 706         adgl = memdup_user(argp, sizeof(struct st_ram_io));
 707         if (IS_ERR(adgl))
 708                 return PTR_ERR(adgl);
 709
 710         lock_kernel();
 711         IndexCard = adgl->num_card-1;
 712
 713         if(cmd != 6 && ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
 714                 static int warncount = 10;
 715                 if (warncount) {
 716                         printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
 717                         warncount--;
 718                 }
 719                 kfree(adgl);
 720                 unlock_kernel();
 721                 return -EINVAL;
 722         }
 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[IndexCard].RamIO + VERS) >> 4),
 806                                (int)(readb(apbs[IndexCard].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         unlock_kernel();
 839         return 0;
 840 }
 841