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