drivers/char/applicom.c

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