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: applicom.c,v 1.1.1.1 2005/04/11 02:50:17 jack 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/slab.h>
  26 #include <asm/errno.h>
  27 #include <asm/io.h>
  28 #include <asm/uaccess.h>
  29 #include <linux/miscdevice.h>
  30 #include <linux/pci.h>
  31 #include <linux/wait.h>
  32 #include <linux/init.h>
  33 #include <linux/compatmac.h>
  34
  35 #include "applicom.h"
  36
  37 #if LINUX_VERSION_CODE < 0x20300
  38 /* These probably want adding to <linux/compatmac.h> */
  39 #define init_waitqueue_head(x) do { *(x) = NULL; } while (0)
  40 #define PCI_BASE_ADDRESS(dev) (dev->base_address[0])
  41 #define DECLARE_WAIT_QUEUE_HEAD(x) struct wait_queue *x
  42 #define __setup(x,y) /* */
  43 #else
  44 #define PCI_BASE_ADDRESS(dev) (dev->resource[0].start)
  45 #endif
  46
  47 /* NOTE: We use for loops with {write,read}b() instead of
  48    memcpy_{from,to}io throughout this driver. This is because
  49    the board doesn't correctly handle word accesses - only
  50    bytes.
  51 */
  52
  53
  54 #undef DEBUG
  55
  56 #define MAX_BOARD 8             /* maximum of pc board possible */
  57 #define MAX_ISA_BOARD 4
  58 #define LEN_RAM_IO 0x800
  59 #define AC_MINOR 157
  60
  61 #ifndef PCI_VENDOR_ID_APPLICOM
  62 #define PCI_VENDOR_ID_APPLICOM                0x1389
  63 #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC     0x0001
  64 #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
  65 #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB     0x0003
  66 #endif
  67 #define MAX_PCI_DEVICE_NUM 3
  68
  69 static char *applicom_pci_devnames[] = {
  70         "PCI board",
  71         "PCI2000IBS / PCI2000CAN",
  72         "PCI2000PFB"
  73 };
  74
  75 static struct pci_device_id applicom_pci_tbl[] = {
  76         { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC,
  77           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
  78         { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN,
  79           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
  80         { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB,
  81           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
  82         { 0 }
  83 };
  84 MODULE_DEVICE_TABLE(pci, applicom_pci_tbl);
  85
  86 MODULE_AUTHOR("David Woodhouse & Applicom International");
  87 MODULE_DESCRIPTION("Driver for Applicom Profibus card");
  88 MODULE_LICENSE("GPL");
  89 MODULE_PARM(irq, "i");
  90 MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
  91 MODULE_PARM(mem, "i");
  92 MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
  93
  94 MODULE_SUPPORTED_DEVICE("ac");
  95
  96
  97 static struct applicom_board {
  98         unsigned long PhysIO;
  99         unsigned long RamIO;
 100         wait_queue_head_t FlagSleepSend;
 101         long irq;
 102         spinlock_t mutex;
 103 } apbs[MAX_BOARD];
 104
 105 static unsigned int irq = 0;    /* interrupt number IRQ       */
 106 static unsigned long mem = 0;   /* physical segment of board  */
 107
 108 static unsigned int numboards;  /* number of installed boards */
 109 static volatile unsigned char Dummy;
 110 static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
 111 static unsigned int WriteErrorCount;    /* number of write error      */
 112 static unsigned int ReadErrorCount;     /* number of read error       */
 113 static unsigned int DeviceErrorCount;   /* number of device error     */
 114
 115 static ssize_t ac_read (struct file *, char *, size_t, loff_t *);
 116 static ssize_t ac_write (struct file *, const char *, size_t, loff_t *);
 117 static int ac_ioctl(struct inode *, struct file *, unsigned int,
 118                     unsigned long);
 119 static void ac_interrupt(int, void *, struct pt_regs *);
 120
 121 static struct file_operations ac_fops = {
 122         owner:THIS_MODULE,
 123         llseek:no_llseek,
 124         read:ac_read,
 125         write:ac_write,
 126         ioctl:ac_ioctl,
 127 };
 128
 129 static struct miscdevice ac_miscdev = {
 130         AC_MINOR,
 131         "ac",
 132         &ac_fops
 133 };
 134
 135 static int dummy;       /* dev_id for request_irq() */
 136
 137 static int ac_register_board(unsigned long physloc, unsigned long loc,
 138                       unsigned char boardno)
 139 {
 140         volatile unsigned char byte_reset_it;
 141
 142         if((readb(loc + CONF_END_TEST)     != 0x00) ||
 143            (readb(loc + CONF_END_TEST + 1) != 0x55) ||
 144            (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
 145            (readb(loc + CONF_END_TEST + 3) != 0xFF))
 146                 return 0;
 147
 148         if (!boardno)
 149                 boardno = readb(loc + NUMCARD_OWNER_TO_PC);
 150
 151         if (!boardno && boardno > MAX_BOARD) {
 152                 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
 153                        boardno, physloc, MAX_BOARD);
 154                 return 0;
 155         }
 156
 157         if (apbs[boardno - 1].RamIO) {
 158                 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n",
 159                        boardno, physloc, boardno, apbs[boardno-1].PhysIO);
 160                 return 0;
 161         }
 162
 163         boardno--;
 164
 165         apbs[boardno].PhysIO = physloc;
 166         apbs[boardno].RamIO = loc;
 167         init_waitqueue_head(&apbs[boardno].FlagSleepSend);
 168         spin_lock_init(&apbs[boardno].mutex);
 169         byte_reset_it = readb(loc + RAM_IT_TO_PC);
 170
 171         numboards++;
 172         return boardno + 1;
 173 }
 174
 175 #ifdef MODULE
 176
 177 #define applicom_init init_module
 178
 179 void cleanup_module(void)
 180 {
 181         int i;
 182
 183         misc_deregister(&ac_miscdev);
 184
 185         for (i = 0; i < MAX_BOARD; i++) {
 186
 187                 if (!apbs[i].RamIO)
 188                         continue;
 189
 190                 iounmap((void *) apbs[i].RamIO);
 191
 192                 if (apbs[i].irq)
 193                         free_irq(apbs[i].irq, &dummy);
 194         }
 195 }
 196
 197 #endif                          /* MODULE */
 198
 199 int __init applicom_init(void)
 200 {
 201         int i, numisa = 0;
 202         struct pci_dev *dev = NULL;
 203         void *RamIO;
 204         int boardno;
 205
 206         printk(KERN_INFO "Applicom driver: $Id: applicom.c,v 1.1.1.1 2005/04/11 02:50:17 jack Exp $\n");
 207
 208         /* No mem and irq given - check for a PCI card */
 209
 210         while ( (dev = pci_find_class(PCI_CLASS_OTHERS << 16, dev))) {
 211
 212                 if (dev->vendor != PCI_VENDOR_ID_APPLICOM)
 213                         continue;
 214
 215                 if (dev->device  > MAX_PCI_DEVICE_NUM || dev->device == 0)
 216                         continue;
 217
 218                 if (pci_enable_device(dev))
 219                         return -EIO;
 220
 221                 RamIO = ioremap(PCI_BASE_ADDRESS(dev), LEN_RAM_IO);
 222
 223                 if (!RamIO) {
 224                         printk(KERN_INFO "ac.o: Failed to ioremap PCI memory space at 0x%lx\n", PCI_BASE_ADDRESS(dev));
 225                         return -EIO;
 226                 }
 227
 228                 printk(KERN_INFO "Applicom %s found at mem 0x%lx, irq %d\n",
 229                        applicom_pci_devnames[dev->device-1], PCI_BASE_ADDRESS(dev),
 230                        dev->irq);
 231
 232                 if (!(boardno = ac_register_board(PCI_BASE_ADDRESS(dev),
 233                                                   (unsigned long)RamIO,0))) {
 234                         printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
 235                         iounmap(RamIO);
 236                         continue;
 237                 }
 238
 239                 if (request_irq(dev->irq, &ac_interrupt, SA_SHIRQ, "Applicom PCI", &dummy)) {
 240                         printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
 241                         iounmap(RamIO);
 242                         apbs[boardno - 1].RamIO = 0;
 243                         continue;
 244                 }
 245
 246                 /* Enable interrupts. */
 247
 248                 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
 249
 250                 apbs[boardno - 1].irq = dev->irq;
 251         }
 252
 253         /* Finished with PCI cards. If none registered,
 254          * and there was no mem/irq specified, exit */
 255
 256         if (!mem || !irq) {
 257                 if (numboards)
 258                         goto fin;
 259                 else {
 260                         printk(KERN_INFO "ac.o: No PCI boards found.\n");
 261                         printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
 262                         return -ENXIO;
 263                 }
 264         }
 265
 266         /* Now try the specified ISA cards */
 267
 268 #warning "LEAK"
 269         RamIO = ioremap(mem, LEN_RAM_IO * MAX_ISA_BOARD);
 270
 271         if (!RamIO)
 272                 printk(KERN_INFO "ac.o: Failed to ioremap ISA memory space at 0x%lx\n", mem);
 273
 274         for (i = 0; i < MAX_ISA_BOARD; i++) {
 275                 RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
 276
 277                 if (!RamIO) {
 278                         printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
 279                         continue;
 280                 }
 281
 282                 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
 283                                                   (unsigned long)RamIO,i+1))) {
 284                         iounmap(RamIO);
 285                         continue;
 286                 }
 287
 288                 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
 289
 290                 if (!numisa) {
 291                         if (request_irq(irq, &ac_interrupt, SA_SHIRQ, "Applicom ISA", &dummy)) {
 292                                 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
 293                                 iounmap((void *) RamIO);
 294                                 apbs[boardno - 1].RamIO = 0;
 295                         }
 296                         apbs[boardno - 1].irq = irq;
 297                 }
 298                 else
 299                         apbs[boardno - 1].irq = 0;
 300
 301                 numisa++;
 302         }
 303
 304         if (!numisa)
 305                 printk(KERN_WARNING"ac.o: No valid ISA Applicom boards found at mem 0x%lx\n",mem);
 306
 307  fin:
 308         init_waitqueue_head(&FlagSleepRec);
 309
 310         WriteErrorCount = 0;
 311         ReadErrorCount = 0;
 312         DeviceErrorCount = 0;
 313
 314         if (numboards) {
 315                 misc_register(&ac_miscdev);
 316                 for (i = 0; i < MAX_BOARD; i++) {
 317                         int serial;
 318                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
 319
 320                         if (!apbs[i].RamIO)
 321                                 continue;
 322
 323                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
 324                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
 325
 326                         boardname[serial] = 0;
 327
 328
 329                         printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
 330                                i+1, boardname,
 331                                (int)(readb(apbs[i].RamIO + VERS) >> 4),
 332                                (int)(readb(apbs[i].RamIO + VERS) & 0xF));
 333
 334                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
 335                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
 336                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
 337
 338                         if (serial != 0)
 339                                 printk(" S/N %d\n", serial);
 340                         else
 341                                 printk("\n");
 342                 }
 343                 return 0;
 344         }
 345
 346         else
 347                 return -ENXIO;
 348 }
 349
 350
 351 #ifndef MODULE
 352 __initcall(applicom_init);
 353 #endif
 354
 355 static ssize_t ac_write(struct file *file, const char *buf, size_t count, loff_t * ppos)
 356 {
 357         unsigned int NumCard;   /* Board number 1 -> 8           */
 358         unsigned int IndexCard; /* Index board number 0 -> 7     */
 359         unsigned char TicCard;  /* Board TIC to send             */
 360         unsigned long flags;    /* Current priority              */
 361         struct st_ram_io st_loc;
 362         struct mailbox tmpmailbox;
 363 #ifdef DEBUG
 364         int c;
 365 #endif
 366         DECLARE_WAITQUEUE(wait, current);
 367
 368         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
 369                 static int warncount = 5;
 370                 if (warncount) {
 371                         printk(KERN_INFO "Hmmm. write() of Applicom card, length %d != expected %d\n",
 372                                count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
 373                         warncount--;
 374                 }
 375                 return -EINVAL;
 376         }
 377
 378         if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io)))
 379                 return -EFAULT;
 380
 381         if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
 382                           sizeof(struct mailbox)))
 383                 return -EFAULT;
 384
 385         NumCard = st_loc.num_card;      /* board number to send          */
 386         TicCard = st_loc.tic_des_from_pc;       /* tic number to send            */
 387         IndexCard = NumCard - 1;
 388
 389         if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
 390                 return -EINVAL;
 391
 392 #ifdef DEBUG
 393         printk("Write to applicom card #%d. struct st_ram_io follows:",
 394                IndexCard+1);
 395
 396                 for (c = 0; c < sizeof(struct st_ram_io);) {
 397
 398                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
 399
 400                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
 401                                 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
 402                         }
 403                 }
 404
 405                 printk("\nstruct mailbox follows:");
 406
 407                 for (c = 0; c < sizeof(struct mailbox);) {
 408                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
 409
 410                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
 411                                 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
 412                         }
 413                 }
 414
 415                 printk("\n");
 416 #endif
 417
 418         spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
 419
 420         /* Test octet ready correct */
 421         if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) {
 422                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
 423                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 424                 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
 425                        IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
 426                 DeviceErrorCount++;
 427                 return -EIO;
 428         }
 429
 430         /* Place ourselves on the wait queue */
 431         set_current_state(TASK_INTERRUPTIBLE);
 432         add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
 433
 434         /* Check whether the card is ready for us */
 435         while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
 436                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
 437                 /* It's busy. Sleep. */
 438
 439                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 440                 schedule();
 441                 if (signal_pending(current)) {
 442                         remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
 443                                           &wait);
 444                         return -EINTR;
 445                 }
 446                 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
 447                 set_current_state(TASK_INTERRUPTIBLE);
 448         }
 449
 450         /* We may not have actually slept */
 451         set_current_state(TASK_RUNNING);
 452         remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
 453
 454         writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 455
 456         /* Which is best - lock down the pages with rawio and then
 457            copy directly, or use bounce buffers? For now we do the latter
 458            because it works with 2.2 still */
 459         {
 460                 unsigned char *from = (unsigned char *) &tmpmailbox;
 461                 unsigned long to = (unsigned long) apbs[IndexCard].RamIO + RAM_FROM_PC;
 462                 int c;
 463
 464                 for (c = 0; c < sizeof(struct mailbox); c++)
 465                         writeb(*(from++), to++);
 466         }
 467
 468         writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
 469         writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
 470         writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
 471         writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
 472         writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 473         writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 474         Dummy = readb(apbs[IndexCard].RamIO + VERS);
 475         spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 476         return 0;
 477 }
 478
 479 static int do_ac_read(int IndexCard, char *buf)
 480 {
 481         struct st_ram_io st_loc;
 482         struct mailbox tmpmailbox;      /* bounce buffer - can't copy to user space with cli() */
 483         unsigned long from = (unsigned long)apbs[IndexCard].RamIO + RAM_TO_PC;
 484         unsigned char *to = (unsigned char *)&tmpmailbox;
 485 #ifdef DEBUG
 486         int c;
 487 #endif
 488
 489         st_loc.tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
 490         st_loc.numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
 491
 492
 493         {
 494                 int c;
 495
 496                 for (c = 0; c < sizeof(struct mailbox); c++)
 497                         *(to++) = readb(from++);
 498         }
 499         writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
 500         writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
 501         writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
 502         writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC),
 503                apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
 504         writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
 505         writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
 506         writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 507         Dummy = readb(apbs[IndexCard].RamIO + VERS);
 508
 509 #ifdef DEBUG
 510                 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
 511
 512                 for (c = 0; c < sizeof(struct st_ram_io);) {
 513                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
 514
 515                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
 516                                 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
 517                         }
 518                 }
 519
 520                 printk("\nstruct mailbox follows:");
 521
 522                 for (c = 0; c < sizeof(struct mailbox);) {
 523                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
 524
 525                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
 526                                 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
 527                         }
 528                 }
 529                 printk("\n");
 530 #endif
 531
 532 #warning "Je suis stupide. DW. - copy*user in cli"
 533
 534         if (copy_to_user(buf, &st_loc, sizeof(struct st_ram_io)))
 535                 return -EFAULT;
 536         if (copy_to_user(&buf[sizeof(struct st_ram_io)], &tmpmailbox, sizeof(struct mailbox)))
 537                 return -EFAULT;
 538
 539         return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
 540 }
 541
 542 static ssize_t ac_read (struct file *filp, char *buf, size_t count, loff_t *ptr)
 543 {
 544         unsigned long flags;
 545         unsigned int i;
 546         unsigned char tmp;
 547         int ret = 0;
 548         DECLARE_WAITQUEUE(wait, current);
 549 #ifdef DEBUG
 550         int loopcount=0;
 551 #endif
 552         /* No need to ratelimit this. Only root can trigger it anyway */
 553         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
 554                 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %d != expected %d\n",
 555                         count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
 556                 return -EINVAL;
 557         }
 558
 559         while(1) {
 560                 /* Stick ourself on the wait queue */
 561                 set_current_state(TASK_INTERRUPTIBLE);
 562                 add_wait_queue(&FlagSleepRec, &wait);
 563
 564                 /* Scan each board, looking for one which has a packet for us */
 565                 for (i=0; i < MAX_BOARD; i++) {
 566                         if (!apbs[i].RamIO)
 567                                 continue;
 568                         spin_lock_irqsave(&apbs[i].mutex, flags);
 569
 570                         tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
 571
 572                         if (tmp == 2) {
 573                                 /* Got a packet for us */
 574                                 ret = do_ac_read(i, buf);
 575                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
 576                                 set_current_state(TASK_RUNNING);
 577                                 remove_wait_queue(&FlagSleepRec, &wait);
 578                                 return tmp;
 579                         }
 580
 581                         if (tmp > 2) {
 582                                 /* Got an error */
 583                                 Dummy = readb(apbs[i].RamIO + VERS);
 584
 585                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
 586                                 set_current_state(TASK_RUNNING);
 587                                 remove_wait_queue(&FlagSleepRec, &wait);
 588
 589                                 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
 590                                        i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
 591                                 DeviceErrorCount++;
 592                                 return -EIO;
 593                         }
 594
 595                         /* Nothing for us. Try the next board */
 596                         Dummy = readb(apbs[i].RamIO + VERS);
 597                         spin_unlock_irqrestore(&apbs[i].mutex, flags);
 598
 599                 } /* per board */
 600
 601                 /* OK - No boards had data for us. Sleep now */
 602
 603                 schedule();
 604                 remove_wait_queue(&FlagSleepRec, &wait);
 605
 606                 if (signal_pending(current))
 607                         return -EINTR;
 608
 609 #ifdef DEBUG
 610                 if (loopcount++ > 2) {
 611                         printk("Looping in ac_read. loopcount %d\n", loopcount);
 612                 }
 613 #endif
 614         }
 615 }
 616
 617 static void ac_interrupt(int vec, void *dev_instance, struct pt_regs *regs)
 618 {
 619         unsigned int i;
 620         unsigned int FlagInt;
 621         unsigned int LoopCount;
 622
 623         //    printk("Applicom interrupt on IRQ %d occurred\n", vec);
 624
 625         LoopCount = 0;
 626
 627         do {
 628                 FlagInt = 0;
 629                 for (i = 0; i < MAX_BOARD; i++) {
 630
 631                         /* Skip if this board doesn't exist */
 632                         if (!apbs[i].RamIO)
 633                                 continue;
 634
 635                         spin_lock(&apbs[i].mutex);
 636
 637                         /* Skip if this board doesn't want attention */
 638                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
 639                                 spin_unlock(&apbs[i].mutex);
 640                                 continue;
 641                         }
 642
 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 }
 687
 688
 689
 690 static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
 691
 692 {                               /* @ ADG ou ATO selon le cas */
 693         int i;
 694         unsigned char IndexCard;
 695         unsigned long pmem;
 696         int ret = 0;
 697         volatile unsigned char byte_reset_it;
 698         struct st_ram_io *adgl;
 699
 700         /* In general, the device is only openable by root anyway, so we're not
 701            particularly concerned that bogus ioctls can flood the console. */
 702
 703         adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL);
 704         if (!adgl)
 705                 return -ENOMEM;
 706
 707         if (copy_from_user(adgl, (void *)arg,sizeof(struct st_ram_io))) {
 708                 kfree(adgl);
 709                 return -EFAULT;
 710         }
 711
 712         IndexCard = adgl->num_card-1;
 713
 714         if(cmd != 0 && cmd != 6 &&
 715            ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
 716                 static int warncount = 10;
 717                 if (warncount) {
 718                         printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
 719                         warncount--;
 720                 }
 721                 kfree(adgl);
 722                 return -EINVAL;
 723         }
 724
 725         switch (cmd) {
 726
 727         case 0:
 728                 pmem = apbs[IndexCard].RamIO;
 729                 for (i = 0; i < sizeof(struct st_ram_io); i++)
 730                         ((unsigned char *)adgl)[i]=readb(pmem++);
 731                 if (copy_to_user((void *)arg, adgl, sizeof(struct st_ram_io)))
 732                         ret = -EFAULT;
 733                 break;
 734         case 1:
 735                 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
 736                 for (i = 0; i < 4; i++)
 737                         adgl->conf_end_test[i] = readb(pmem++);
 738                 for (i = 0; i < 2; i++)
 739                         adgl->error_code[i] = readb(pmem++);
 740                 for (i = 0; i < 4; i++)
 741                         adgl->parameter_error[i] = readb(pmem++);
 742                 pmem = apbs[IndexCard].RamIO + VERS;
 743                 adgl->vers = readb(pmem);
 744                 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
 745                 for (i = 0; i < 20; i++)
 746                         adgl->reserv1[i] = readb(pmem++);
 747                 *(int *)&adgl->reserv1[20] =
 748                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
 749                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
 750                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
 751
 752                 if (copy_to_user((void *)arg, adgl, sizeof(struct st_ram_io)))
 753                         ret = -EFAULT;
 754                 break;
 755         case 2:
 756                 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
 757                 for (i = 0; i < 10; i++)
 758                         writeb(0xff, pmem++);
 759                 writeb(adgl->data_from_pc_ready,
 760                        apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 761
 762                 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 763
 764                 for (i = 0; i < MAX_BOARD; i++) {
 765                         if (apbs[i].RamIO) {
 766                                 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
 767                         }
 768                 }
 769                 break;
 770         case 3:
 771                 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
 772                 writeb(adgl->tic_des_from_pc, pmem);
 773                 break;
 774         case 4:
 775                 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
 776                 adgl->tic_owner_to_pc     = readb(pmem++);
 777                 adgl->numcard_owner_to_pc = readb(pmem);
 778                 if (copy_to_user((void *)arg, adgl,sizeof(struct st_ram_io)))
 779                         ret = -EFAULT;
 780                 break;
 781         case 5:
 782                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
 783                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
 784                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
 785                 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 786                 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 787                 break;
 788         case 6:
 789                 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.1.1.1 $)\n");
 790                 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
 791                 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
 792                 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
 793                 for (i = 0; i < MAX_BOARD; i++) {
 794                         int serial;
 795                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
 796
 797                         if (!apbs[i].RamIO)
 798                                 continue;
 799
 800                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
 801                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
 802                         boardname[serial] = 0;
 803
 804                         printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
 805                                i+1,
 806                                (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4),
 807                                (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF),
 808                                boardname);
 809
 810
 811                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
 812                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
 813                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
 814
 815                         if (serial != 0)
 816                                 printk(" S/N %d\n", serial);
 817                         else
 818                                 printk("\n");
 819                 }
 820                 if (DeviceErrorCount != 0)
 821                         printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
 822                 if (ReadErrorCount != 0)
 823                         printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
 824                 if (WriteErrorCount != 0)
 825                         printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
 826                 if (waitqueue_active(&FlagSleepRec))
 827                         printk(KERN_INFO "Process in read pending\n");
 828                 for (i = 0; i < MAX_BOARD; i++) {
 829                         if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
 830                                 printk(KERN_INFO "Process in write pending board %d\n",i+1);
 831                 }
 832                 break;
 833         default:
 834                 printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ;
 835                 ret = -EINVAL;
 836                 break;
 837         }
 838         Dummy = readb(apbs[IndexCard].RamIO + VERS);
 839         kfree(adgl);
 840         return 0;
 841 }
 842
 843 #ifndef MODULE
 844 static int __init applicom_setup(char *str)
 845 {
 846         int ints[4];
 847
 848         (void) get_options(str, 4, ints);
 849
 850         if (ints[0] > 2) {
 851                 printk(KERN_WARNING "Too many arguments to 'applicom=', expected mem,irq only.\n");
 852         }
 853
 854         if (ints[0] < 2) {
 855                 printk(KERN_INFO"applicom numargs: %d\n", ints[0]);
 856                 return 0;
 857         }
 858
 859         mem = ints[1];
 860         irq = ints[2];
 861         return 1;
 862 }
 863
 864 __setup("applicom=", applicom_setup);
 865
 866 #endif                          /* MODULE */
 867