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
  61 static char *applicom_pci_devnames[] = {
  62         "PCI board",
  63         "PCI2000IBS / PCI2000CAN",
  64         "PCI2000PFB"
  65 };
  66
  67 static struct pci_device_id applicom_pci_tbl[] = {
  68         { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) },
  69         { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) },
  70         { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) },
  71         { 0 }
  72 };
  73 MODULE_DEVICE_TABLE(pci, applicom_pci_tbl);
  74
  75 MODULE_AUTHOR("David Woodhouse & Applicom International");
  76 MODULE_DESCRIPTION("Driver for Applicom Profibus card");
  77 MODULE_LICENSE("GPL");
  78 MODULE_ALIAS_MISCDEV(AC_MINOR);
  79
  80 MODULE_SUPPORTED_DEVICE("ac");
  81
  82
  83 static struct applicom_board {
  84         unsigned long PhysIO;
  85         void __iomem *RamIO;
  86         wait_queue_head_t FlagSleepSend;
  87         long irq;
  88         spinlock_t mutex;
  89 } apbs[MAX_BOARD];
  90
  91 static unsigned int irq = 0;    /* interrupt number IRQ       */
  92 static unsigned long mem = 0;   /* physical segment of board  */
  93
  94 module_param(irq, uint, 0);
  95 MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
  96 module_param(mem, ulong, 0);
  97 MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
  98
  99 static unsigned int numboards;  /* number of installed boards */
 100 static volatile unsigned char Dummy;
 101 static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
 102 static unsigned int WriteErrorCount;    /* number of write error      */
 103 static unsigned int ReadErrorCount;     /* number of read error       */
 104 static unsigned int DeviceErrorCount;   /* number of device error     */
 105
 106 static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
 107 static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
 108 static int ac_ioctl(struct inode *, struct file *, unsigned int,
 109                     unsigned long);
 110 static irqreturn_t ac_interrupt(int, void *);
 111
 112 static const struct file_operations ac_fops = {
 113         .owner = THIS_MODULE,
 114         .llseek = no_llseek,
 115         .read = ac_read,
 116         .write = ac_write,
 117         .ioctl = ac_ioctl,
 118 };
 119
 120 static struct miscdevice ac_miscdev = {
 121         AC_MINOR,
 122         "ac",
 123         &ac_fops
 124 };
 125
 126 static int dummy;       /* dev_id for request_irq() */
 127
 128 static int ac_register_board(unsigned long physloc, void __iomem *loc,
 129                       unsigned char boardno)
 130 {
 131         volatile unsigned char byte_reset_it;
 132
 133         if((readb(loc + CONF_END_TEST)     != 0x00) ||
 134            (readb(loc + CONF_END_TEST + 1) != 0x55) ||
 135            (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
 136            (readb(loc + CONF_END_TEST + 3) != 0xFF))
 137                 return 0;
 138
 139         if (!boardno)
 140                 boardno = readb(loc + NUMCARD_OWNER_TO_PC);
 141
 142         if (!boardno || boardno > MAX_BOARD) {
 143                 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
 144                        boardno, physloc, MAX_BOARD);
 145                 return 0;
 146         }
 147
 148         if (apbs[boardno - 1].RamIO) {
 149                 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n",
 150                        boardno, physloc, boardno, apbs[boardno-1].PhysIO);
 151                 return 0;
 152         }
 153
 154         boardno--;
 155
 156         apbs[boardno].PhysIO = physloc;
 157         apbs[boardno].RamIO = loc;
 158         init_waitqueue_head(&apbs[boardno].FlagSleepSend);
 159         spin_lock_init(&apbs[boardno].mutex);
 160         byte_reset_it = readb(loc + RAM_IT_TO_PC);
 161
 162         numboards++;
 163         return boardno + 1;
 164 }
 165
 166 static void __exit applicom_exit(void)
 167 {
 168         unsigned int i;
 169
 170         misc_deregister(&ac_miscdev);
 171
 172         for (i = 0; i < MAX_BOARD; i++) {
 173
 174                 if (!apbs[i].RamIO)
 175                         continue;
 176
 177                 if (apbs[i].irq)
 178                         free_irq(apbs[i].irq, &dummy);
 179
 180                 iounmap(apbs[i].RamIO);
 181         }
 182 }
 183
 184 static int __init applicom_init(void)
 185 {
 186         int i, numisa = 0;
 187         struct pci_dev *dev = NULL;
 188         void __iomem *RamIO;
 189         int boardno, ret;
 190
 191         printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
 192
 193         /* No mem and irq given - check for a PCI card */
 194
 195         while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
 196
 197                 if (!pci_match_id(applicom_pci_tbl, dev))
 198                         continue;
 199
 200                 if (pci_enable_device(dev))
 201                         return -EIO;
 202
 203                 RamIO = ioremap_nocache(pci_resource_start(dev, 0), LEN_RAM_IO);
 204
 205                 if (!RamIO) {
 206                         printk(KERN_INFO "ac.o: Failed to ioremap PCI memory "
 207                                 "space at 0x%llx\n",
 208                                 (unsigned long long)pci_resource_start(dev, 0));
 209                         pci_disable_device(dev);
 210                         return -EIO;
 211                 }
 212
 213                 printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n",
 214                        applicom_pci_devnames[dev->device-1],
 215                            (unsigned long long)pci_resource_start(dev, 0),
 216                        dev->irq);
 217
 218                 boardno = ac_register_board(pci_resource_start(dev, 0),
 219                                 RamIO, 0);
 220                 if (!boardno) {
 221                         printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
 222                         iounmap(RamIO);
 223                         pci_disable_device(dev);
 224                         continue;
 225                 }
 226
 227                 if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) {
 228                         printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
 229                         iounmap(RamIO);
 230                         pci_disable_device(dev);
 231                         apbs[boardno - 1].RamIO = NULL;
 232                         continue;
 233                 }
 234
 235                 /* Enable interrupts. */
 236
 237                 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
 238
 239                 apbs[boardno - 1].irq = dev->irq;
 240         }
 241
 242         /* Finished with PCI cards. If none registered,
 243          * and there was no mem/irq specified, exit */
 244
 245         if (!mem || !irq) {
 246                 if (numboards)
 247                         goto fin;
 248                 else {
 249                         printk(KERN_INFO "ac.o: No PCI boards found.\n");
 250                         printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
 251                         return -ENXIO;
 252                 }
 253         }
 254
 255         /* Now try the specified ISA cards */
 256
 257         for (i = 0; i < MAX_ISA_BOARD; i++) {
 258                 RamIO = ioremap_nocache(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
 259
 260                 if (!RamIO) {
 261                         printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
 262                         continue;
 263                 }
 264
 265                 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
 266                                                   RamIO,i+1))) {
 267                         iounmap(RamIO);
 268                         continue;
 269                 }
 270
 271                 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
 272
 273                 if (!numisa) {
 274                         if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) {
 275                                 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
 276                                 iounmap(RamIO);
 277                                 apbs[boardno - 1].RamIO = NULL;
 278                         }
 279                         else
 280                                 apbs[boardno - 1].irq = irq;
 281                 }
 282                 else
 283                         apbs[boardno - 1].irq = 0;
 284
 285                 numisa++;
 286         }
 287
 288         if (!numisa)
 289                 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
 290                                 "at mem 0x%lx\n", mem);
 291
 292  fin:
 293         init_waitqueue_head(&FlagSleepRec);
 294
 295         WriteErrorCount = 0;
 296         ReadErrorCount = 0;
 297         DeviceErrorCount = 0;
 298
 299         if (numboards) {
 300                 ret = misc_register(&ac_miscdev);
 301                 if (ret) {
 302                         printk(KERN_WARNING "ac.o: Unable to register misc device\n");
 303                         goto out;
 304                 }
 305                 for (i = 0; i < MAX_BOARD; i++) {
 306                         int serial;
 307                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
 308
 309                         if (!apbs[i].RamIO)
 310                                 continue;
 311
 312                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
 313                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
 314
 315                         boardname[serial] = 0;
 316
 317
 318                         printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
 319                                i+1, boardname,
 320                                (int)(readb(apbs[i].RamIO + VERS) >> 4),
 321                                (int)(readb(apbs[i].RamIO + VERS) & 0xF));
 322
 323                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
 324                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
 325                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
 326
 327                         if (serial != 0)
 328                                 printk(" S/N %d\n", serial);
 329                         else
 330                                 printk("\n");
 331                 }
 332                 return 0;
 333         }
 334
 335         else
 336                 return -ENXIO;
 337
 338 out:
 339         for (i = 0; i < MAX_BOARD; i++) {
 340                 if (!apbs[i].RamIO)
 341                         continue;
 342                 if (apbs[i].irq)
 343                         free_irq(apbs[i].irq, &dummy);
 344                 iounmap(apbs[i].RamIO);
 345         }
 346         pci_disable_device(dev);
 347         return ret;
 348 }
 349
 350 module_init(applicom_init);
 351 module_exit(applicom_exit);
 352
 353
 354 static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
 355 {
 356         unsigned int NumCard;   /* Board number 1 -> 8           */
 357         unsigned int IndexCard; /* Index board number 0 -> 7     */
 358         unsigned char TicCard;  /* Board TIC to send             */
 359         unsigned long flags;    /* Current priority              */
 360         struct st_ram_io st_loc;
 361         struct mailbox tmpmailbox;
 362 #ifdef DEBUG
 363         int c;
 364 #endif
 365         DECLARE_WAITQUEUE(wait, current);
 366
 367         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
 368                 static int warncount = 5;
 369                 if (warncount) {
 370                         printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
 371                                count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
 372                         warncount--;
 373                 }
 374                 return -EINVAL;
 375         }
 376
 377         if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io)))
 378                 return -EFAULT;
 379
 380         if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
 381                           sizeof(struct mailbox)))
 382                 return -EFAULT;
 383
 384         NumCard = st_loc.num_card;      /* board number to send          */
 385         TicCard = st_loc.tic_des_from_pc;       /* tic number to send            */
 386         IndexCard = NumCard - 1;
 387
 388         if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
 389                 return -EINVAL;
 390
 391 #ifdef DEBUG
 392         printk("Write to applicom card #%d. struct st_ram_io follows:",
 393                IndexCard+1);
 394
 395                 for (c = 0; c < sizeof(struct st_ram_io);) {
 396
 397                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
 398
 399                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
 400                                 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
 401                         }
 402                 }
 403
 404                 printk("\nstruct mailbox follows:");
 405
 406                 for (c = 0; c < sizeof(struct mailbox);) {
 407                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
 408
 409                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
 410                                 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
 411                         }
 412                 }
 413
 414                 printk("\n");
 415 #endif
 416
 417         spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
 418
 419         /* Test octet ready correct */
 420         if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) {
 421                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
 422                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 423                 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
 424                        IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
 425                 DeviceErrorCount++;
 426                 return -EIO;
 427         }
 428
 429         /* Place ourselves on the wait queue */
 430         set_current_state(TASK_INTERRUPTIBLE);
 431         add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
 432
 433         /* Check whether the card is ready for us */
 434         while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
 435                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
 436                 /* It's busy. Sleep. */
 437
 438                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 439                 schedule();
 440                 if (signal_pending(current)) {
 441                         remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
 442                                           &wait);
 443                         return -EINTR;
 444                 }
 445                 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
 446                 set_current_state(TASK_INTERRUPTIBLE);
 447         }
 448
 449         /* We may not have actually slept */
 450         set_current_state(TASK_RUNNING);
 451         remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
 452
 453         writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 454
 455         /* Which is best - lock down the pages with rawio and then
 456            copy directly, or use bounce buffers? For now we do the latter
 457            because it works with 2.2 still */
 458         {
 459                 unsigned char *from = (unsigned char *) &tmpmailbox;
 460                 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
 461                 int c;
 462
 463                 for (c = 0; c < sizeof(struct mailbox); c++)
 464                         writeb(*(from++), to++);
 465         }
 466
 467         writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
 468         writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
 469         writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
 470         writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
 471         writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 472         writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 473         Dummy = readb(apbs[IndexCard].RamIO + VERS);
 474         spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 475         return 0;
 476 }
 477
 478 static int do_ac_read(int IndexCard, char __user *buf,
 479                 struct st_ram_io *st_loc, struct mailbox *mailbox)
 480 {
 481         void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
 482         unsigned char *to = (unsigned char *)mailbox;
 483 #ifdef DEBUG
 484         int c;
 485 #endif
 486
 487         st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
 488         st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
 489
 490
 491         {
 492                 int c;
 493
 494                 for (c = 0; c < sizeof(struct mailbox); c++)
 495                         *(to++) = readb(from++);
 496         }
 497         writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
 498         writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
 499         writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
 500         writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC),
 501                apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
 502         writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
 503         writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
 504         writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 505         Dummy = readb(apbs[IndexCard].RamIO + VERS);
 506
 507 #ifdef DEBUG
 508                 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
 509
 510                 for (c = 0; c < sizeof(struct st_ram_io);) {
 511                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
 512
 513                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
 514                                 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
 515                         }
 516                 }
 517
 518                 printk("\nstruct mailbox follows:");
 519
 520                 for (c = 0; c < sizeof(struct mailbox);) {
 521                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
 522
 523                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
 524                                 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
 525                         }
 526                 }
 527                 printk("\n");
 528 #endif
 529         return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
 530 }
 531
 532 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
 533 {
 534         unsigned long flags;
 535         unsigned int i;
 536         unsigned char tmp;
 537         int ret = 0;
 538         DECLARE_WAITQUEUE(wait, current);
 539 #ifdef DEBUG
 540         int loopcount=0;
 541 #endif
 542         /* No need to ratelimit this. Only root can trigger it anyway */
 543         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
 544                 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
 545                         count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
 546                 return -EINVAL;
 547         }
 548
 549         while(1) {
 550                 /* Stick ourself on the wait queue */
 551                 set_current_state(TASK_INTERRUPTIBLE);
 552                 add_wait_queue(&FlagSleepRec, &wait);
 553
 554                 /* Scan each board, looking for one which has a packet for us */
 555                 for (i=0; i < MAX_BOARD; i++) {
 556                         if (!apbs[i].RamIO)
 557                                 continue;
 558                         spin_lock_irqsave(&apbs[i].mutex, flags);
 559
 560                         tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
 561
 562                         if (tmp == 2) {
 563                                 struct st_ram_io st_loc;
 564                                 struct mailbox mailbox;
 565
 566                                 /* Got a packet for us */
 567                                 ret = do_ac_read(i, buf, &st_loc, &mailbox);
 568                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
 569                                 set_current_state(TASK_RUNNING);
 570                                 remove_wait_queue(&FlagSleepRec, &wait);
 571
 572                                 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
 573                                         return -EFAULT;
 574                                 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
 575                                         return -EFAULT;
 576                                 return tmp;
 577                         }
 578
 579                         if (tmp > 2) {
 580                                 /* Got an error */
 581                                 Dummy = readb(apbs[i].RamIO + VERS);
 582
 583                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
 584                                 set_current_state(TASK_RUNNING);
 585                                 remove_wait_queue(&FlagSleepRec, &wait);
 586
 587                                 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
 588                                        i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
 589                                 DeviceErrorCount++;
 590                                 return -EIO;
 591                         }
 592
 593                         /* Nothing for us. Try the next board */
 594                         Dummy = readb(apbs[i].RamIO + VERS);
 595                         spin_unlock_irqrestore(&apbs[i].mutex, flags);
 596
 597                 } /* per board */
 598
 599                 /* OK - No boards had data for us. Sleep now */
 600
 601                 schedule();
 602                 remove_wait_queue(&FlagSleepRec, &wait);
 603
 604                 if (signal_pending(current))
 605                         return -EINTR;
 606
 607 #ifdef DEBUG
 608                 if (loopcount++ > 2) {
 609                         printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
 610                 }
 611 #endif
 612         }
 613 }
 614
 615 static irqreturn_t ac_interrupt(int vec, void *dev_instance)
 616 {
 617         unsigned int i;
 618         unsigned int FlagInt;
 619         unsigned int LoopCount;
 620         int handled = 0;
 621
 622         //    printk("Applicom interrupt on IRQ %d occurred\n", vec);
 623
 624         LoopCount = 0;
 625
 626         do {
 627                 FlagInt = 0;
 628                 for (i = 0; i < MAX_BOARD; i++) {
 629
 630                         /* Skip if this board doesn't exist */
 631                         if (!apbs[i].RamIO)
 632                                 continue;
 633
 634                         spin_lock(&apbs[i].mutex);
 635
 636                         /* Skip if this board doesn't want attention */
 637                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
 638                                 spin_unlock(&apbs[i].mutex);
 639                                 continue;
 640                         }
 641
 642                         handled = 1;
 643                         FlagInt = 1;
 644                         writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
 645
 646                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
 647                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
 648                                        i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
 649                                 DeviceErrorCount++;
 650                         }
 651
 652                         if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) &&
 653                            (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
 654
 655                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
 656                                        i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
 657                                 DeviceErrorCount++;
 658                         }
 659
 660                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) {     /* mailbox sent by the card ?   */
 661                                 if (waitqueue_active(&FlagSleepRec)) {
 662                                 wake_up_interruptible(&FlagSleepRec);
 663                         }
 664                         }
 665
 666                         if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) {   /* ram i/o free for write by pc ? */
 667                                 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ?    */
 668                                         wake_up_interruptible(&apbs[i].FlagSleepSend);
 669                                 }
 670                         }
 671                         Dummy = readb(apbs[i].RamIO + VERS);
 672
 673                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
 674                                 /* There's another int waiting on this card */
 675                                 spin_unlock(&apbs[i].mutex);
 676                                 i--;
 677                         } else {
 678                                 spin_unlock(&apbs[i].mutex);
 679                         }
 680                 }
 681                 if (FlagInt)
 682                         LoopCount = 0;
 683                 else
 684                         LoopCount++;
 685         } while(LoopCount < 2);
 686         return IRQ_RETVAL(handled);
 687 }
 688
 689
 690
 691 static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
 692
 693 {                               /* @ ADG ou ATO selon le cas */
 694         int i;
 695         unsigned char IndexCard;
 696         void __iomem *pmem;
 697         int ret = 0;
 698         volatile unsigned char byte_reset_it;
 699         struct st_ram_io *adgl;
 700         void __user *argp = (void __user *)arg;
 701
 702         /* In general, the device is only openable by root anyway, so we're not
 703            particularly concerned that bogus ioctls can flood the console. */
 704
 705         adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL);
 706         if (!adgl)
 707                 return -ENOMEM;
 708
 709         if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) {
 710                 kfree(adgl);
 711                 return -EFAULT;
 712         }
 713
 714         IndexCard = adgl->num_card-1;
 715
 716         if(cmd != 6 && ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
 717                 static int warncount = 10;
 718                 if (warncount) {
 719                         printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
 720                         warncount--;
 721                 }
 722                 kfree(adgl);
 723                 return -EINVAL;
 724         }
 725
 726         switch (cmd) {
 727
 728         case 0:
 729                 pmem = apbs[IndexCard].RamIO;
 730                 for (i = 0; i < sizeof(struct st_ram_io); i++)
 731                         ((unsigned char *)adgl)[i]=readb(pmem++);
 732                 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
 733                         ret = -EFAULT;
 734                 break;
 735         case 1:
 736                 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
 737                 for (i = 0; i < 4; i++)
 738                         adgl->conf_end_test[i] = readb(pmem++);
 739                 for (i = 0; i < 2; i++)
 740                         adgl->error_code[i] = readb(pmem++);
 741                 for (i = 0; i < 4; i++)
 742                         adgl->parameter_error[i] = readb(pmem++);
 743                 pmem = apbs[IndexCard].RamIO + VERS;
 744                 adgl->vers = readb(pmem);
 745                 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
 746                 for (i = 0; i < 20; i++)
 747                         adgl->reserv1[i] = readb(pmem++);
 748                 *(int *)&adgl->reserv1[20] =
 749                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
 750                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
 751                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
 752
 753                 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
 754                         ret = -EFAULT;
 755                 break;
 756         case 2:
 757                 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
 758                 for (i = 0; i < 10; i++)
 759                         writeb(0xff, pmem++);
 760                 writeb(adgl->data_from_pc_ready,
 761                        apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 762
 763                 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 764
 765                 for (i = 0; i < MAX_BOARD; i++) {
 766                         if (apbs[i].RamIO) {
 767                                 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
 768                         }
 769                 }
 770                 break;
 771         case 3:
 772                 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
 773                 writeb(adgl->tic_des_from_pc, pmem);
 774                 break;
 775         case 4:
 776                 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
 777                 adgl->tic_owner_to_pc     = readb(pmem++);
 778                 adgl->numcard_owner_to_pc = readb(pmem);
 779                 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
 780                         ret = -EFAULT;
 781                 break;
 782         case 5:
 783                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
 784                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
 785                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
 786                 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 787                 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 788                 break;
 789         case 6:
 790                 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
 791                 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
 792                 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
 793                 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
 794                 for (i = 0; i < MAX_BOARD; i++) {
 795                         int serial;
 796                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
 797
 798                         if (!apbs[i].RamIO)
 799                                 continue;
 800
 801                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
 802                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
 803                         boardname[serial] = 0;
 804
 805                         printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
 806                                i+1,
 807                                (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4),
 808                                (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF),
 809                                boardname);
 810
 811
 812                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
 813                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
 814                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
 815
 816                         if (serial != 0)
 817                                 printk(" S/N %d\n", serial);
 818                         else
 819                                 printk("\n");
 820                 }
 821                 if (DeviceErrorCount != 0)
 822                         printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
 823                 if (ReadErrorCount != 0)
 824                         printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
 825                 if (WriteErrorCount != 0)
 826                         printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
 827                 if (waitqueue_active(&FlagSleepRec))
 828                         printk(KERN_INFO "Process in read pending\n");
 829                 for (i = 0; i < MAX_BOARD; i++) {
 830                         if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
 831                                 printk(KERN_INFO "Process in write pending board %d\n",i+1);
 832                 }
 833                 break;
 834         default:
 835                 ret = -ENOTTY;
 836                 break;
 837         }
 838         Dummy = readb(apbs[IndexCard].RamIO + VERS);
 839         kfree(adgl);
 840         return 0;
 841 }
 842