git.oblomov.eu Git - linux-2.6/blob - 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 *);
 114
 115 static const 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 static void __exit applicom_exit(void)
 170 {
 171         unsigned int i;
 172
 173         misc_deregister(&ac_miscdev);
 174
 175         for (i = 0; i < MAX_BOARD; i++) {
 176
 177                 if (!apbs[i].RamIO)
 178                         continue;
 179
 180                 if (apbs[i].irq)
 181                         free_irq(apbs[i].irq, &dummy);
 182
 183                 iounmap(apbs[i].RamIO);
 184         }
 185 }
 186
 187 static int __init applicom_init(void)
 188 {
 189         int i, numisa = 0;
 190         struct pci_dev *dev = NULL;
 191         void __iomem *RamIO;
 192         int boardno, ret;
 193
 194         printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
 195
 196         /* No mem and irq given - check for a PCI card */
 197
 198         while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
 199
 200                 if (dev->vendor != PCI_VENDOR_ID_APPLICOM)
 201                         continue;
 202
 203                 if (dev->device  > MAX_PCI_DEVICE_NUM || dev->device == 0)
 204                         continue;
 205
 206                 if (pci_enable_device(dev))
 207                         return -EIO;
 208
 209                 RamIO = ioremap(dev->resource[0].start, LEN_RAM_IO);
 210
 211                 if (!RamIO) {
 212                         printk(KERN_INFO "ac.o: Failed to ioremap PCI memory "
 213                                 "space at 0x%llx\n",
 214                                 (unsigned long long)dev->resource[0].start);
 215                         pci_disable_device(dev);
 216                         return -EIO;
 217                 }
 218
 219                 printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n",
 220                        applicom_pci_devnames[dev->device-1],
 221                            (unsigned long long)dev->resource[0].start,
 222                        dev->irq);
 223
 224                 boardno = ac_register_board(dev->resource[0].start, RamIO,0);
 225                 if (!boardno) {
 226                         printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
 227                         iounmap(RamIO);
 228                         pci_disable_device(dev);
 229                         continue;
 230                 }
 231
 232                 if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) {
 233                         printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
 234                         iounmap(RamIO);
 235                         pci_disable_device(dev);
 236                         apbs[boardno - 1].RamIO = NULL;
 237                         continue;
 238                 }
 239
 240                 /* Enable interrupts. */
 241
 242                 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
 243
 244                 apbs[boardno - 1].irq = dev->irq;
 245         }
 246
 247         /* Finished with PCI cards. If none registered,
 248          * and there was no mem/irq specified, exit */
 249
 250         if (!mem || !irq) {
 251                 if (numboards)
 252                         goto fin;
 253                 else {
 254                         printk(KERN_INFO "ac.o: No PCI boards found.\n");
 255                         printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
 256                         return -ENXIO;
 257                 }
 258         }
 259
 260         /* Now try the specified ISA cards */
 261
 262         for (i = 0; i < MAX_ISA_BOARD; i++) {
 263                 RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
 264
 265                 if (!RamIO) {
 266                         printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
 267                         continue;
 268                 }
 269
 270                 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
 271                                                   RamIO,i+1))) {
 272                         iounmap(RamIO);
 273                         continue;
 274                 }
 275
 276                 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
 277
 278                 if (!numisa) {
 279                         if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) {
 280                                 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
 281                                 iounmap(RamIO);
 282                                 apbs[boardno - 1].RamIO = NULL;
 283                         }
 284                         else
 285                                 apbs[boardno - 1].irq = irq;
 286                 }
 287                 else
 288                         apbs[boardno - 1].irq = 0;
 289
 290                 numisa++;
 291         }
 292
 293         if (!numisa)
 294                 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
 295                                 "at mem 0x%lx\n", mem);
 296
 297  fin:
 298         init_waitqueue_head(&FlagSleepRec);
 299
 300         WriteErrorCount = 0;
 301         ReadErrorCount = 0;
 302         DeviceErrorCount = 0;
 303
 304         if (numboards) {
 305                 ret = misc_register(&ac_miscdev);
 306                 if (ret) {
 307                         printk(KERN_WARNING "ac.o: Unable to register misc device\n");
 308                         goto out;
 309                 }
 310                 for (i = 0; i < MAX_BOARD; i++) {
 311                         int serial;
 312                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
 313
 314                         if (!apbs[i].RamIO)
 315                                 continue;
 316
 317                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
 318                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
 319
 320                         boardname[serial] = 0;
 321
 322
 323                         printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
 324                                i+1, boardname,
 325                                (int)(readb(apbs[i].RamIO + VERS) >> 4),
 326                                (int)(readb(apbs[i].RamIO + VERS) & 0xF));
 327
 328                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
 329                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
 330                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
 331
 332                         if (serial != 0)
 333                                 printk(" S/N %d\n", serial);
 334                         else
 335                                 printk("\n");
 336                 }
 337                 return 0;
 338         }
 339
 340         else
 341                 return -ENXIO;
 342
 343 out:
 344         for (i = 0; i < MAX_BOARD; i++) {
 345                 if (!apbs[i].RamIO)
 346                         continue;
 347                 if (apbs[i].irq)
 348                         free_irq(apbs[i].irq, &dummy);
 349                 iounmap(apbs[i].RamIO);
 350         }
 351         pci_disable_device(dev);
 352         return ret;
 353 }
 354
 355 module_init(applicom_init);
 356 module_exit(applicom_exit);
 357
 358
 359 static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
 360 {
 361         unsigned int NumCard;   /* Board number 1 -> 8           */
 362         unsigned int IndexCard; /* Index board number 0 -> 7     */
 363         unsigned char TicCard;  /* Board TIC to send             */
 364         unsigned long flags;    /* Current priority              */
 365         struct st_ram_io st_loc;
 366         struct mailbox tmpmailbox;
 367 #ifdef DEBUG
 368         int c;
 369 #endif
 370         DECLARE_WAITQUEUE(wait, current);
 371
 372         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
 373                 static int warncount = 5;
 374                 if (warncount) {
 375                         printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
 376                                count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
 377                         warncount--;
 378                 }
 379                 return -EINVAL;
 380         }
 381
 382         if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io)))
 383                 return -EFAULT;
 384
 385         if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
 386                           sizeof(struct mailbox)))
 387                 return -EFAULT;
 388
 389         NumCard = st_loc.num_card;      /* board number to send          */
 390         TicCard = st_loc.tic_des_from_pc;       /* tic number to send            */
 391         IndexCard = NumCard - 1;
 392
 393         if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
 394                 return -EINVAL;
 395
 396 #ifdef DEBUG
 397         printk("Write to applicom card #%d. struct st_ram_io follows:",
 398                IndexCard+1);
 399
 400                 for (c = 0; c < sizeof(struct st_ram_io);) {
 401
 402                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
 403
 404                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
 405                                 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
 406                         }
 407                 }
 408
 409                 printk("\nstruct mailbox follows:");
 410
 411                 for (c = 0; c < sizeof(struct mailbox);) {
 412                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
 413
 414                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
 415                                 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
 416                         }
 417                 }
 418
 419                 printk("\n");
 420 #endif
 421
 422         spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
 423
 424         /* Test octet ready correct */
 425         if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) {
 426                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
 427                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 428                 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
 429                        IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
 430                 DeviceErrorCount++;
 431                 return -EIO;
 432         }
 433
 434         /* Place ourselves on the wait queue */
 435         set_current_state(TASK_INTERRUPTIBLE);
 436         add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
 437
 438         /* Check whether the card is ready for us */
 439         while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
 440                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
 441                 /* It's busy. Sleep. */
 442
 443                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 444                 schedule();
 445                 if (signal_pending(current)) {
 446                         remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
 447                                           &wait);
 448                         return -EINTR;
 449                 }
 450                 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
 451                 set_current_state(TASK_INTERRUPTIBLE);
 452         }
 453
 454         /* We may not have actually slept */
 455         set_current_state(TASK_RUNNING);
 456         remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
 457
 458         writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 459
 460         /* Which is best - lock down the pages with rawio and then
 461            copy directly, or use bounce buffers? For now we do the latter
 462            because it works with 2.2 still */
 463         {
 464                 unsigned char *from = (unsigned char *) &tmpmailbox;
 465                 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
 466                 int c;
 467
 468                 for (c = 0; c < sizeof(struct mailbox); c++)
 469                         writeb(*(from++), to++);
 470         }
 471
 472         writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
 473         writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
 474         writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
 475         writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
 476         writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 477         writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 478         Dummy = readb(apbs[IndexCard].RamIO + VERS);
 479         spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 480         return 0;
 481 }
 482
 483 static int do_ac_read(int IndexCard, char __user *buf,
 484                 struct st_ram_io *st_loc, struct mailbox *mailbox)
 485 {
 486         void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
 487         unsigned char *to = (unsigned char *)&mailbox;
 488 #ifdef DEBUG
 489         int c;
 490 #endif
 491
 492         st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
 493         st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
 494
 495
 496         {
 497                 int c;
 498
 499                 for (c = 0; c < sizeof(struct mailbox); c++)
 500                         *(to++) = readb(from++);
 501         }
 502         writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
 503         writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
 504         writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
 505         writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC),
 506                apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
 507         writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
 508         writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
 509         writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 510         Dummy = readb(apbs[IndexCard].RamIO + VERS);
 511
 512 #ifdef DEBUG
 513                 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
 514
 515                 for (c = 0; c < sizeof(struct st_ram_io);) {
 516                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
 517
 518                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
 519                                 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
 520                         }
 521                 }
 522
 523                 printk("\nstruct mailbox follows:");
 524
 525                 for (c = 0; c < sizeof(struct mailbox);) {
 526                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
 527
 528                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
 529                                 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
 530                         }
 531                 }
 532                 printk("\n");
 533 #endif
 534         return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
 535 }
 536
 537 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
 538 {
 539         unsigned long flags;
 540         unsigned int i;
 541         unsigned char tmp;
 542         int ret = 0;
 543         DECLARE_WAITQUEUE(wait, current);
 544 #ifdef DEBUG
 545         int loopcount=0;
 546 #endif
 547         /* No need to ratelimit this. Only root can trigger it anyway */
 548         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
 549                 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
 550                         count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
 551                 return -EINVAL;
 552         }
 553
 554         while(1) {
 555                 /* Stick ourself on the wait queue */
 556                 set_current_state(TASK_INTERRUPTIBLE);
 557                 add_wait_queue(&FlagSleepRec, &wait);
 558
 559                 /* Scan each board, looking for one which has a packet for us */
 560                 for (i=0; i < MAX_BOARD; i++) {
 561                         if (!apbs[i].RamIO)
 562                                 continue;
 563                         spin_lock_irqsave(&apbs[i].mutex, flags);
 564
 565                         tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
 566
 567                         if (tmp == 2) {
 568                                 struct st_ram_io st_loc;
 569                                 struct mailbox mailbox;
 570
 571                                 /* Got a packet for us */
 572                                 ret = do_ac_read(i, buf, &st_loc, &mailbox);
 573                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
 574                                 set_current_state(TASK_RUNNING);
 575                                 remove_wait_queue(&FlagSleepRec, &wait);
 576
 577                                 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
 578                                         return -EFAULT;
 579                                 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
 580                                         return -EFAULT;
 581                                 return tmp;
 582                         }
 583
 584                         if (tmp > 2) {
 585                                 /* Got an error */
 586                                 Dummy = readb(apbs[i].RamIO + VERS);
 587
 588                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
 589                                 set_current_state(TASK_RUNNING);
 590                                 remove_wait_queue(&FlagSleepRec, &wait);
 591
 592                                 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
 593                                        i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
 594                                 DeviceErrorCount++;
 595                                 return -EIO;
 596                         }
 597
 598                         /* Nothing for us. Try the next board */
 599                         Dummy = readb(apbs[i].RamIO + VERS);
 600                         spin_unlock_irqrestore(&apbs[i].mutex, flags);
 601
 602                 } /* per board */
 603
 604                 /* OK - No boards had data for us. Sleep now */
 605
 606                 schedule();
 607                 remove_wait_queue(&FlagSleepRec, &wait);
 608
 609                 if (signal_pending(current))
 610                         return -EINTR;
 611
 612 #ifdef DEBUG
 613                 if (loopcount++ > 2) {
 614                         printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
 615                 }
 616 #endif
 617         }
 618 }
 619
 620 static irqreturn_t ac_interrupt(int vec, void *dev_instance)
 621 {
 622         unsigned int i;
 623         unsigned int FlagInt;
 624         unsigned int LoopCount;
 625         int handled = 0;
 626
 627         //    printk("Applicom interrupt on IRQ %d occurred\n", vec);
 628
 629         LoopCount = 0;
 630
 631         do {
 632                 FlagInt = 0;
 633                 for (i = 0; i < MAX_BOARD; i++) {
 634
 635                         /* Skip if this board doesn't exist */
 636                         if (!apbs[i].RamIO)
 637                                 continue;
 638
 639                         spin_lock(&apbs[i].mutex);
 640
 641                         /* Skip if this board doesn't want attention */
 642                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
 643                                 spin_unlock(&apbs[i].mutex);
 644                                 continue;
 645                         }
 646
 647                         handled = 1;
 648                         FlagInt = 1;
 649                         writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
 650
 651                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
 652                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
 653                                        i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
 654                                 DeviceErrorCount++;
 655                         }
 656
 657                         if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) &&
 658                            (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
 659
 660                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
 661                                        i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
 662                                 DeviceErrorCount++;
 663                         }
 664
 665                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) {     /* mailbox sent by the card ?   */
 666                                 if (waitqueue_active(&FlagSleepRec)) {
 667                                 wake_up_interruptible(&FlagSleepRec);
 668                         }
 669                         }
 670
 671                         if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) {   /* ram i/o free for write by pc ? */
 672                                 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ?    */
 673                                         wake_up_interruptible(&apbs[i].FlagSleepSend);
 674                                 }
 675                         }
 676                         Dummy = readb(apbs[i].RamIO + VERS);
 677
 678                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
 679                                 /* There's another int waiting on this card */
 680                                 spin_unlock(&apbs[i].mutex);
 681                                 i--;
 682                         } else {
 683                                 spin_unlock(&apbs[i].mutex);
 684                         }
 685                 }
 686                 if (FlagInt)
 687                         LoopCount = 0;
 688                 else
 689                         LoopCount++;
 690         } while(LoopCount < 2);
 691         return IRQ_RETVAL(handled);
 692 }
 693
 694
 695
 696 static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
 697
 698 {                               /* @ ADG ou ATO selon le cas */
 699         int i;
 700         unsigned char IndexCard;
 701         void __iomem *pmem;
 702         int ret = 0;
 703         volatile unsigned char byte_reset_it;
 704         struct st_ram_io *adgl;
 705         void __user *argp = (void __user *)arg;
 706
 707         /* In general, the device is only openable by root anyway, so we're not
 708            particularly concerned that bogus ioctls can flood the console. */
 709
 710         adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL);
 711         if (!adgl)
 712                 return -ENOMEM;
 713
 714         if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) {
 715                 kfree(adgl);
 716                 return -EFAULT;
 717         }
 718
 719         IndexCard = adgl->num_card-1;
 720
 721         if(cmd != 0 && cmd != 6 &&
 722            ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
 723                 static int warncount = 10;
 724                 if (warncount) {
 725                         printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
 726                         warncount--;
 727                 }
 728                 kfree(adgl);
 729                 return -EINVAL;
 730         }
 731
 732         switch (cmd) {
 733
 734         case 0:
 735                 pmem = apbs[IndexCard].RamIO;
 736                 for (i = 0; i < sizeof(struct st_ram_io); i++)
 737                         ((unsigned char *)adgl)[i]=readb(pmem++);
 738                 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
 739                         ret = -EFAULT;
 740                 break;
 741         case 1:
 742                 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
 743                 for (i = 0; i < 4; i++)
 744                         adgl->conf_end_test[i] = readb(pmem++);
 745                 for (i = 0; i < 2; i++)
 746                         adgl->error_code[i] = readb(pmem++);
 747                 for (i = 0; i < 4; i++)
 748                         adgl->parameter_error[i] = readb(pmem++);
 749                 pmem = apbs[IndexCard].RamIO + VERS;
 750                 adgl->vers = readb(pmem);
 751                 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
 752                 for (i = 0; i < 20; i++)
 753                         adgl->reserv1[i] = readb(pmem++);
 754                 *(int *)&adgl->reserv1[20] =
 755                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
 756                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
 757                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
 758
 759                 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
 760                         ret = -EFAULT;
 761                 break;
 762         case 2:
 763                 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
 764                 for (i = 0; i < 10; i++)
 765                         writeb(0xff, pmem++);
 766                 writeb(adgl->data_from_pc_ready,
 767                        apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 768
 769                 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 770
 771                 for (i = 0; i < MAX_BOARD; i++) {
 772                         if (apbs[i].RamIO) {
 773                                 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
 774                         }
 775                 }
 776                 break;
 777         case 3:
 778                 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
 779                 writeb(adgl->tic_des_from_pc, pmem);
 780                 break;
 781         case 4:
 782                 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
 783                 adgl->tic_owner_to_pc     = readb(pmem++);
 784                 adgl->numcard_owner_to_pc = readb(pmem);
 785                 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
 786                         ret = -EFAULT;
 787                 break;
 788         case 5:
 789                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
 790                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
 791                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
 792                 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 793                 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 794                 break;
 795         case 6:
 796                 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
 797                 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
 798                 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
 799                 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
 800                 for (i = 0; i < MAX_BOARD; i++) {
 801                         int serial;
 802                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
 803
 804                         if (!apbs[i].RamIO)
 805                                 continue;
 806
 807                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
 808                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
 809                         boardname[serial] = 0;
 810
 811                         printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
 812                                i+1,
 813                                (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4),
 814                                (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF),
 815                                boardname);
 816
 817
 818                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
 819                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
 820                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
 821
 822                         if (serial != 0)
 823                                 printk(" S/N %d\n", serial);
 824                         else
 825                                 printk("\n");
 826                 }
 827                 if (DeviceErrorCount != 0)
 828                         printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
 829                 if (ReadErrorCount != 0)
 830                         printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
 831                 if (WriteErrorCount != 0)
 832                         printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
 833                 if (waitqueue_active(&FlagSleepRec))
 834                         printk(KERN_INFO "Process in read pending\n");
 835                 for (i = 0; i < MAX_BOARD; i++) {
 836                         if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
 837                                 printk(KERN_INFO "Process in write pending board %d\n",i+1);
 838                 }
 839                 break;
 840         default:
 841                 printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ;
 842                 ret = -EINVAL;
 843                 break;
 844         }
 845         Dummy = readb(apbs[IndexCard].RamIO + VERS);
 846         kfree(adgl);
 847         return 0;
 848 }
 849