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 /* adresses 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/slab.h>
  27 #include <linux/errno.h>
  28 #include <linux/miscdevice.h>
  29 #include <linux/pci.h>
  30 #include <linux/wait.h>
  31 #include <linux/init.h>
  32 #include <linux/fs.h>
  33
  34 #include <asm/io.h>
  35 #include <asm/uaccess.h>
  36
  37 #include "applicom.h"
  38
  39
  40 /* NOTE: We use for loops with {write,read}b() instead of
  41    memcpy_{from,to}io throughout this driver. This is because
  42    the board doesn't correctly handle word accesses - only
  43    bytes.
  44 */
  45
  46
  47 #undef DEBUG
  48
  49 #define MAX_BOARD 8             /* maximum of pc board possible */
  50 #define MAX_ISA_BOARD 4
  51 #define LEN_RAM_IO 0x800
  52 #define AC_MINOR 157
  53
  54 #ifndef PCI_VENDOR_ID_APPLICOM
  55 #define PCI_VENDOR_ID_APPLICOM                0x1389
  56 #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC     0x0001
  57 #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
  58 #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB     0x0003
  59 #endif
  60 #define MAX_PCI_DEVICE_NUM 3
  61
  62 static char *applicom_pci_devnames[] = {
  63         "PCI board",
  64         "PCI2000IBS / PCI2000CAN",
  65         "PCI2000PFB"
  66 };
  67
  68 static struct pci_device_id applicom_pci_tbl[] = {
  69         { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC,
  70           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
  71         { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN,
  72           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
  73         { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB,
  74           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
  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
  83 MODULE_SUPPORTED_DEVICE("ac");
  84
  85
  86 static struct applicom_board {
  87         unsigned long PhysIO;
  88         void __iomem *RamIO;
  89         wait_queue_head_t FlagSleepSend;
  90         long irq;
  91         spinlock_t mutex;
  92 } apbs[MAX_BOARD];
  93
  94 static unsigned int irq = 0;    /* interrupt number IRQ       */
  95 static unsigned long mem = 0;   /* physical segment of board  */
  96
  97 module_param(irq, uint, 0);
  98 MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
  99 module_param(mem, ulong, 0);
 100 MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
 101
 102 static unsigned int numboards;  /* number of installed boards */
 103 static volatile unsigned char Dummy;
 104 static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
 105 static unsigned int WriteErrorCount;    /* number of write error      */
 106 static unsigned int ReadErrorCount;     /* number of read error       */
 107 static unsigned int DeviceErrorCount;   /* number of device error     */
 108
 109 static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
 110 static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
 111 static int ac_ioctl(struct inode *, struct file *, unsigned int,
 112                     unsigned long);
 113 static irqreturn_t ac_interrupt(int, void *, struct pt_regs *);
 114
 115 static struct file_operations ac_fops = {
 116         .owner = THIS_MODULE,
 117         .llseek = no_llseek,
 118         .read = ac_read,
 119         .write = ac_write,
 120         .ioctl = ac_ioctl,
 121 };
 122
 123 static struct miscdevice ac_miscdev = {
 124         AC_MINOR,
 125         "ac",
 126         &ac_fops
 127 };
 128
 129 static int dummy;       /* dev_id for request_irq() */
 130
 131 static int ac_register_board(unsigned long physloc, void __iomem *loc,
 132                       unsigned char boardno)
 133 {
 134         volatile unsigned char byte_reset_it;
 135
 136         if((readb(loc + CONF_END_TEST)     != 0x00) ||
 137            (readb(loc + CONF_END_TEST + 1) != 0x55) ||
 138            (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
 139            (readb(loc + CONF_END_TEST + 3) != 0xFF))
 140                 return 0;
 141
 142         if (!boardno)
 143                 boardno = readb(loc + NUMCARD_OWNER_TO_PC);
 144
 145         if (!boardno && boardno > MAX_BOARD) {
 146                 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
 147                        boardno, physloc, MAX_BOARD);
 148                 return 0;
 149         }
 150
 151         if (apbs[boardno - 1].RamIO) {
 152                 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n",
 153                        boardno, physloc, boardno, apbs[boardno-1].PhysIO);
 154                 return 0;
 155         }
 156
 157         boardno--;
 158
 159         apbs[boardno].PhysIO = physloc;
 160         apbs[boardno].RamIO = loc;
 161         init_waitqueue_head(&apbs[boardno].FlagSleepSend);
 162         spin_lock_init(&apbs[boardno].mutex);
 163         byte_reset_it = readb(loc + RAM_IT_TO_PC);
 164
 165         numboards++;
 166         return boardno + 1;
 167 }
 168
 169 #ifdef MODULE
 170
 171 #define applicom_init init_module
 172
 173 void cleanup_module(void)
 174 {
 175         int i;
 176
 177         misc_deregister(&ac_miscdev);
 178
 179         for (i = 0; i < MAX_BOARD; i++) {
 180
 181                 if (!apbs[i].RamIO)
 182                         continue;
 183
 184                 if (apbs[i].irq)
 185                         free_irq(apbs[i].irq, &dummy);
 186
 187                 iounmap(apbs[i].RamIO);
 188         }
 189 }
 190
 191 #endif                          /* MODULE */
 192
 193 int __init applicom_init(void)
 194 {
 195         int i, numisa = 0;
 196         struct pci_dev *dev = NULL;
 197         void __iomem *RamIO;
 198         int boardno;
 199
 200         printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
 201
 202         /* No mem and irq given - check for a PCI card */
 203
 204         while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
 205
 206                 if (dev->vendor != PCI_VENDOR_ID_APPLICOM)
 207                         continue;
 208
 209                 if (dev->device  > MAX_PCI_DEVICE_NUM || dev->device == 0)
 210                         continue;
 211
 212                 if (pci_enable_device(dev))
 213                         return -EIO;
 214
 215                 RamIO = ioremap(dev->resource[0].start, LEN_RAM_IO);
 216
 217                 if (!RamIO) {
 218                         printk(KERN_INFO "ac.o: Failed to ioremap PCI memory space at 0x%lx\n", dev->resource[0].start);
 219                         pci_disable_device(dev);
 220                         return -EIO;
 221                 }
 222
 223                 printk(KERN_INFO "Applicom %s found at mem 0x%lx, irq %d\n",
 224                        applicom_pci_devnames[dev->device-1], dev->resource[0].start,
 225                        dev->irq);
 226
 227                 boardno = ac_register_board(dev->resource[0].start, RamIO,0);
 228                 if (!boardno) {
 229                         printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
 230                         iounmap(RamIO);
 231                         pci_disable_device(dev);
 232                         continue;
 233                 }
 234
 235                 if (request_irq(dev->irq, &ac_interrupt, SA_SHIRQ, "Applicom PCI", &dummy)) {
 236                         printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
 237                         iounmap(RamIO);
 238                         pci_disable_device(dev);
 239                         apbs[boardno - 1].RamIO = NULL;
 240                         continue;
 241                 }
 242
 243                 /* Enable interrupts. */
 244
 245                 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
 246
 247                 apbs[boardno - 1].irq = dev->irq;
 248         }
 249
 250         /* Finished with PCI cards. If none registered,
 251          * and there was no mem/irq specified, exit */
 252
 253         if (!mem || !irq) {
 254                 if (numboards)
 255                         goto fin;
 256                 else {
 257                         printk(KERN_INFO "ac.o: No PCI boards found.\n");
 258                         printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
 259                         return -ENXIO;
 260                 }
 261         }
 262
 263         /* Now try the specified ISA cards */
 264
 265         for (i = 0; i < MAX_ISA_BOARD; i++) {
 266                 RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
 267
 268                 if (!RamIO) {
 269                         printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
 270                         continue;
 271                 }
 272
 273                 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
 274                                                   RamIO,i+1))) {
 275                         iounmap(RamIO);
 276                         continue;
 277                 }
 278
 279                 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
 280
 281                 if (!numisa) {
 282                         if (request_irq(irq, &ac_interrupt, SA_SHIRQ, "Applicom ISA", &dummy)) {
 283                                 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
 284                                 iounmap(RamIO);
 285                                 apbs[boardno - 1].RamIO = NULL;
 286                         }
 287                         else
 288                                 apbs[boardno - 1].irq = irq;
 289                 }
 290                 else
 291                         apbs[boardno - 1].irq = 0;
 292
 293                 numisa++;
 294         }
 295
 296         if (!numisa)
 297                 printk(KERN_WARNING"ac.o: No valid ISA Applicom boards found at mem 0x%lx\n",mem);
 298
 299  fin:
 300         init_waitqueue_head(&FlagSleepRec);
 301
 302         WriteErrorCount = 0;
 303         ReadErrorCount = 0;
 304         DeviceErrorCount = 0;
 305
 306         if (numboards) {
 307                 misc_register(&ac_miscdev);
 308                 for (i = 0; i < MAX_BOARD; i++) {
 309                         int serial;
 310                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
 311
 312                         if (!apbs[i].RamIO)
 313                                 continue;
 314
 315                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
 316                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
 317
 318                         boardname[serial] = 0;
 319
 320
 321                         printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
 322                                i+1, boardname,
 323                                (int)(readb(apbs[i].RamIO + VERS) >> 4),
 324                                (int)(readb(apbs[i].RamIO + VERS) & 0xF));
 325
 326                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
 327                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
 328                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
 329
 330                         if (serial != 0)
 331                                 printk(" S/N %d\n", serial);
 332                         else
 333                                 printk("\n");
 334                 }
 335                 return 0;
 336         }
 337
 338         else
 339                 return -ENXIO;
 340 }
 341
 342
 343 #ifndef MODULE
 344 __initcall(applicom_init);
 345 #endif
 346
 347 static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
 348 {
 349         unsigned int NumCard;   /* Board number 1 -> 8           */
 350         unsigned int IndexCard; /* Index board number 0 -> 7     */
 351         unsigned char TicCard;  /* Board TIC to send             */
 352         unsigned long flags;    /* Current priority              */
 353         struct st_ram_io st_loc;
 354         struct mailbox tmpmailbox;
 355 #ifdef DEBUG
 356         int c;
 357 #endif
 358         DECLARE_WAITQUEUE(wait, current);
 359
 360         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
 361                 static int warncount = 5;
 362                 if (warncount) {
 363                         printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
 364                                count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
 365                         warncount--;
 366                 }
 367                 return -EINVAL;
 368         }
 369
 370         if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io)))
 371                 return -EFAULT;
 372
 373         if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
 374                           sizeof(struct mailbox)))
 375                 return -EFAULT;
 376
 377         NumCard = st_loc.num_card;      /* board number to send          */
 378         TicCard = st_loc.tic_des_from_pc;       /* tic number to send            */
 379         IndexCard = NumCard - 1;
 380
 381         if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
 382                 return -EINVAL;
 383
 384 #ifdef DEBUG
 385         printk("Write to applicom card #%d. struct st_ram_io follows:",
 386                IndexCard+1);
 387
 388                 for (c = 0; c < sizeof(struct st_ram_io);) {
 389
 390                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
 391
 392                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
 393                                 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
 394                         }
 395                 }
 396
 397                 printk("\nstruct mailbox follows:");
 398
 399                 for (c = 0; c < sizeof(struct mailbox);) {
 400                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
 401
 402                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
 403                                 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
 404                         }
 405                 }
 406
 407                 printk("\n");
 408 #endif
 409
 410         spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
 411
 412         /* Test octet ready correct */
 413         if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) {
 414                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
 415                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 416                 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
 417                        IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
 418                 DeviceErrorCount++;
 419                 return -EIO;
 420         }
 421
 422         /* Place ourselves on the wait queue */
 423         set_current_state(TASK_INTERRUPTIBLE);
 424         add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
 425
 426         /* Check whether the card is ready for us */
 427         while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
 428                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
 429                 /* It's busy. Sleep. */
 430
 431                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 432                 schedule();
 433                 if (signal_pending(current)) {
 434                         remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
 435                                           &wait);
 436                         return -EINTR;
 437                 }
 438                 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
 439                 set_current_state(TASK_INTERRUPTIBLE);
 440         }
 441
 442         /* We may not have actually slept */
 443         set_current_state(TASK_RUNNING);
 444         remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
 445
 446         writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 447
 448         /* Which is best - lock down the pages with rawio and then
 449            copy directly, or use bounce buffers? For now we do the latter
 450            because it works with 2.2 still */
 451         {
 452                 unsigned char *from = (unsigned char *) &tmpmailbox;
 453                 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
 454                 int c;
 455
 456                 for (c = 0; c < sizeof(struct mailbox); c++)
 457                         writeb(*(from++), to++);
 458         }
 459
 460         writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
 461         writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
 462         writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
 463         writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
 464         writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 465         writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 466         Dummy = readb(apbs[IndexCard].RamIO + VERS);
 467         spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 468         return 0;
 469 }
 470
 471 static int do_ac_read(int IndexCard, char __user *buf,
 472                 struct st_ram_io *st_loc, struct mailbox *mailbox)
 473 {
 474         void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
 475         unsigned char *to = (unsigned char *)&mailbox;
 476 #ifdef DEBUG
 477         int c;
 478 #endif
 479
 480         st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
 481         st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
 482
 483
 484         {
 485                 int c;
 486
 487                 for (c = 0; c < sizeof(struct mailbox); c++)
 488                         *(to++) = readb(from++);
 489         }
 490         writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
 491         writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
 492         writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
 493         writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC),
 494                apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
 495         writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
 496         writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
 497         writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 498         Dummy = readb(apbs[IndexCard].RamIO + VERS);
 499
 500 #ifdef DEBUG
 501                 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
 502
 503                 for (c = 0; c < sizeof(struct st_ram_io);) {
 504                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
 505
 506                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
 507                                 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
 508                         }
 509                 }
 510
 511                 printk("\nstruct mailbox follows:");
 512
 513                 for (c = 0; c < sizeof(struct mailbox);) {
 514                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
 515
 516                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
 517                                 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
 518                         }
 519                 }
 520                 printk("\n");
 521 #endif
 522         return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
 523 }
 524
 525 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
 526 {
 527         unsigned long flags;
 528         unsigned int i;
 529         unsigned char tmp;
 530         int ret = 0;
 531         DECLARE_WAITQUEUE(wait, current);
 532 #ifdef DEBUG
 533         int loopcount=0;
 534 #endif
 535         /* No need to ratelimit this. Only root can trigger it anyway */
 536         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
 537                 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
 538                         count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
 539                 return -EINVAL;
 540         }
 541
 542         while(1) {
 543                 /* Stick ourself on the wait queue */
 544                 set_current_state(TASK_INTERRUPTIBLE);
 545                 add_wait_queue(&FlagSleepRec, &wait);
 546
 547                 /* Scan each board, looking for one which has a packet for us */
 548                 for (i=0; i < MAX_BOARD; i++) {
 549                         if (!apbs[i].RamIO)
 550                                 continue;
 551                         spin_lock_irqsave(&apbs[i].mutex, flags);
 552
 553                         tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
 554
 555                         if (tmp == 2) {
 556                                 struct st_ram_io st_loc;
 557                                 struct mailbox mailbox;
 558
 559                                 /* Got a packet for us */
 560                                 ret = do_ac_read(i, buf, &st_loc, &mailbox);
 561                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
 562                                 set_current_state(TASK_RUNNING);
 563                                 remove_wait_queue(&FlagSleepRec, &wait);
 564
 565                                 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
 566                                         return -EFAULT;
 567                                 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
 568                                         return -EFAULT;
 569                                 return tmp;
 570                         }
 571
 572                         if (tmp > 2) {
 573                                 /* Got an error */
 574                                 Dummy = readb(apbs[i].RamIO + VERS);
 575
 576                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
 577                                 set_current_state(TASK_RUNNING);
 578                                 remove_wait_queue(&FlagSleepRec, &wait);
 579
 580                                 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
 581                                        i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
 582                                 DeviceErrorCount++;
 583                                 return -EIO;
 584                         }
 585
 586                         /* Nothing for us. Try the next board */
 587                         Dummy = readb(apbs[i].RamIO + VERS);
 588                         spin_unlock_irqrestore(&apbs[i].mutex, flags);
 589
 590                 } /* per board */
 591
 592                 /* OK - No boards had data for us. Sleep now */
 593
 594                 schedule();
 595                 remove_wait_queue(&FlagSleepRec, &wait);
 596
 597                 if (signal_pending(current))
 598                         return -EINTR;
 599
 600 #ifdef DEBUG
 601                 if (loopcount++ > 2) {
 602                         printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
 603                 }
 604 #endif
 605         }
 606 }
 607
 608 static irqreturn_t ac_interrupt(int vec, void *dev_instance, struct pt_regs *regs)
 609 {
 610         unsigned int i;
 611         unsigned int FlagInt;
 612         unsigned int LoopCount;
 613         int handled = 0;
 614
 615         //    printk("Applicom interrupt on IRQ %d occurred\n", vec);
 616
 617         LoopCount = 0;
 618
 619         do {
 620                 FlagInt = 0;
 621                 for (i = 0; i < MAX_BOARD; i++) {
 622
 623                         /* Skip if this board doesn't exist */
 624                         if (!apbs[i].RamIO)
 625                                 continue;
 626
 627                         spin_lock(&apbs[i].mutex);
 628
 629                         /* Skip if this board doesn't want attention */
 630                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
 631                                 spin_unlock(&apbs[i].mutex);
 632                                 continue;
 633                         }
 634
 635                         handled = 1;
 636                         FlagInt = 1;
 637                         writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
 638
 639                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
 640                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
 641                                        i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
 642                                 DeviceErrorCount++;
 643                         }
 644
 645                         if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) &&
 646                            (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
 647
 648                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
 649                                        i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
 650                                 DeviceErrorCount++;
 651                         }
 652
 653                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) {     /* mailbox sent by the card ?   */
 654                                 if (waitqueue_active(&FlagSleepRec)) {
 655                                 wake_up_interruptible(&FlagSleepRec);
 656                         }
 657                         }
 658
 659                         if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) {   /* ram i/o free for write by pc ? */
 660                                 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ?    */
 661                                         wake_up_interruptible(&apbs[i].FlagSleepSend);
 662                                 }
 663                         }
 664                         Dummy = readb(apbs[i].RamIO + VERS);
 665
 666                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
 667                                 /* There's another int waiting on this card */
 668                                 spin_unlock(&apbs[i].mutex);
 669                                 i--;
 670                         } else {
 671                                 spin_unlock(&apbs[i].mutex);
 672                         }
 673                 }
 674                 if (FlagInt)
 675                         LoopCount = 0;
 676                 else
 677                         LoopCount++;
 678         } while(LoopCount < 2);
 679         return IRQ_RETVAL(handled);
 680 }
 681
 682
 683
 684 static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
 685
 686 {                               /* @ ADG ou ATO selon le cas */
 687         int i;
 688         unsigned char IndexCard;
 689         void __iomem *pmem;
 690         int ret = 0;
 691         volatile unsigned char byte_reset_it;
 692         struct st_ram_io *adgl;
 693         void __user *argp = (void __user *)arg;
 694
 695         /* In general, the device is only openable by root anyway, so we're not
 696            particularly concerned that bogus ioctls can flood the console. */
 697
 698         adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL);
 699         if (!adgl)
 700                 return -ENOMEM;
 701
 702         if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) {
 703                 kfree(adgl);
 704                 return -EFAULT;
 705         }
 706
 707         IndexCard = adgl->num_card-1;
 708
 709         if(cmd != 0 && cmd != 6 &&
 710            ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
 711                 static int warncount = 10;
 712                 if (warncount) {
 713                         printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
 714                         warncount--;
 715                 }
 716                 kfree(adgl);
 717                 return -EINVAL;
 718         }
 719
 720         switch (cmd) {
 721
 722         case 0:
 723                 pmem = apbs[IndexCard].RamIO;
 724                 for (i = 0; i < sizeof(struct st_ram_io); i++)
 725                         ((unsigned char *)adgl)[i]=readb(pmem++);
 726                 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
 727                         ret = -EFAULT;
 728                 break;
 729         case 1:
 730                 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
 731                 for (i = 0; i < 4; i++)
 732                         adgl->conf_end_test[i] = readb(pmem++);
 733                 for (i = 0; i < 2; i++)
 734                         adgl->error_code[i] = readb(pmem++);
 735                 for (i = 0; i < 4; i++)
 736                         adgl->parameter_error[i] = readb(pmem++);
 737                 pmem = apbs[IndexCard].RamIO + VERS;
 738                 adgl->vers = readb(pmem);
 739                 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
 740                 for (i = 0; i < 20; i++)
 741                         adgl->reserv1[i] = readb(pmem++);
 742                 *(int *)&adgl->reserv1[20] =
 743                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
 744                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
 745                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
 746
 747                 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
 748                         ret = -EFAULT;
 749                 break;
 750         case 2:
 751                 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
 752                 for (i = 0; i < 10; i++)
 753                         writeb(0xff, pmem++);
 754                 writeb(adgl->data_from_pc_ready,
 755                        apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 756
 757                 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 758
 759                 for (i = 0; i < MAX_BOARD; i++) {
 760                         if (apbs[i].RamIO) {
 761                                 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
 762                         }
 763                 }
 764                 break;
 765         case 3:
 766                 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
 767                 writeb(adgl->tic_des_from_pc, pmem);
 768                 break;
 769         case 4:
 770                 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
 771                 adgl->tic_owner_to_pc     = readb(pmem++);
 772                 adgl->numcard_owner_to_pc = readb(pmem);
 773                 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
 774                         ret = -EFAULT;
 775                 break;
 776         case 5:
 777                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
 778                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
 779                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
 780                 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 781                 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 782                 break;
 783         case 6:
 784                 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
 785                 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
 786                 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
 787                 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
 788                 for (i = 0; i < MAX_BOARD; i++) {
 789                         int serial;
 790                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
 791
 792                         if (!apbs[i].RamIO)
 793                                 continue;
 794
 795                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
 796                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
 797                         boardname[serial] = 0;
 798
 799                         printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
 800                                i+1,
 801                                (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4),
 802                                (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF),
 803                                boardname);
 804
 805
 806                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
 807                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
 808                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
 809
 810                         if (serial != 0)
 811                                 printk(" S/N %d\n", serial);
 812                         else
 813                                 printk("\n");
 814                 }
 815                 if (DeviceErrorCount != 0)
 816                         printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
 817                 if (ReadErrorCount != 0)
 818                         printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
 819                 if (WriteErrorCount != 0)
 820                         printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
 821                 if (waitqueue_active(&FlagSleepRec))
 822                         printk(KERN_INFO "Process in read pending\n");
 823                 for (i = 0; i < MAX_BOARD; i++) {
 824                         if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
 825                                 printk(KERN_INFO "Process in write pending board %d\n",i+1);
 826                 }
 827                 break;
 828         default:
 829                 printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ;
 830                 ret = -EINVAL;
 831                 break;
 832         }
 833         Dummy = readb(apbs[IndexCard].RamIO + VERS);
 834         kfree(adgl);
 835         return 0;
 836 }
 837
 838 #ifndef MODULE
 839 static int __init applicom_setup(char *str)
 840 {
 841         int ints[4];
 842
 843         (void) get_options(str, 4, ints);
 844
 845         if (ints[0] > 2) {
 846                 printk(KERN_WARNING "Too many arguments to 'applicom=', expected mem,irq only.\n");
 847         }
 848
 849         if (ints[0] < 2) {
 850                 printk(KERN_INFO"applicom numargs: %d\n", ints[0]);
 851                 return 0;
 852         }
 853
 854         mem = ints[1];
 855         irq = ints[2];
 856         return 1;
 857 }
 858
 859 __setup("applicom=", applicom_setup);
 860
 861 #endif                          /* MODULE */
 862