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 *, struct pt_regs *);
 114
 115 static 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 #ifdef MODULE
 170
 171 #define applicom_init init_module
 172
 173 void cleanup_module(void)
 174 {
 175         unsigned int i;
 176
 177         misc_deregister(&ac_miscdev);
 178
 179         for (i = 0; i < MAX_BOARD; i++) {
 180
 181                 if (!apbs[i].RamIO)
 182                         continue;
 183
 184                 if (apbs[i].irq)
 185                         free_irq(apbs[i].irq, &dummy);
 186
 187                 iounmap(apbs[i].RamIO);
 188         }
 189 }
 190
 191 #endif                          /* MODULE */
 192
 193 int __init applicom_init(void)
 194 {
 195         int i, numisa = 0;
 196         struct pci_dev *dev = NULL;
 197         void __iomem *RamIO;
 198         int boardno, ret;
 199
 200         printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
 201
 202         /* No mem and irq given - check for a PCI card */
 203
 204         while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
 205
 206                 if (dev->vendor != PCI_VENDOR_ID_APPLICOM)
 207                         continue;
 208
 209                 if (dev->device  > MAX_PCI_DEVICE_NUM || dev->device == 0)
 210                         continue;
 211
 212                 if (pci_enable_device(dev))
 213                         return -EIO;
 214
 215                 RamIO = ioremap(dev->resource[0].start, LEN_RAM_IO);
 216
 217                 if (!RamIO) {
 218                         printk(KERN_INFO "ac.o: Failed to ioremap PCI memory space at 0x%lx\n", dev->resource[0].start);
 219                         pci_disable_device(dev);
 220                         return -EIO;
 221                 }
 222
 223                 printk(KERN_INFO "Applicom %s found at mem 0x%lx, irq %d\n",
 224                        applicom_pci_devnames[dev->device-1], dev->resource[0].start,
 225                        dev->irq);
 226
 227                 boardno = ac_register_board(dev->resource[0].start, RamIO,0);
 228                 if (!boardno) {
 229                         printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
 230                         iounmap(RamIO);
 231                         pci_disable_device(dev);
 232                         continue;
 233                 }
 234
 235                 if (request_irq(dev->irq, &ac_interrupt, SA_SHIRQ, "Applicom PCI", &dummy)) {
 236                         printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
 237                         iounmap(RamIO);
 238                         pci_disable_device(dev);
 239                         apbs[boardno - 1].RamIO = NULL;
 240                         continue;
 241                 }
 242
 243                 /* Enable interrupts. */
 244
 245                 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
 246
 247                 apbs[boardno - 1].irq = dev->irq;
 248         }
 249
 250         /* Finished with PCI cards. If none registered,
 251          * and there was no mem/irq specified, exit */
 252
 253         if (!mem || !irq) {
 254                 if (numboards)
 255                         goto fin;
 256                 else {
 257                         printk(KERN_INFO "ac.o: No PCI boards found.\n");
 258                         printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
 259                         return -ENXIO;
 260                 }
 261         }
 262
 263         /* Now try the specified ISA cards */
 264
 265         for (i = 0; i < MAX_ISA_BOARD; i++) {
 266                 RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
 267
 268                 if (!RamIO) {
 269                         printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
 270                         continue;
 271                 }
 272
 273                 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
 274                                                   RamIO,i+1))) {
 275                         iounmap(RamIO);
 276                         continue;
 277                 }
 278
 279                 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
 280
 281                 if (!numisa) {
 282                         if (request_irq(irq, &ac_interrupt, SA_SHIRQ, "Applicom ISA", &dummy)) {
 283                                 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
 284                                 iounmap(RamIO);
 285                                 apbs[boardno - 1].RamIO = NULL;
 286                         }
 287                         else
 288                                 apbs[boardno - 1].irq = irq;
 289                 }
 290                 else
 291                         apbs[boardno - 1].irq = 0;
 292
 293                 numisa++;
 294         }
 295
 296         if (!numisa)
 297                 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
 298                                 "at mem 0x%lx\n", mem);
 299
 300  fin:
 301         init_waitqueue_head(&FlagSleepRec);
 302
 303         WriteErrorCount = 0;
 304         ReadErrorCount = 0;
 305         DeviceErrorCount = 0;
 306
 307         if (numboards) {
 308                 ret = misc_register(&ac_miscdev);
 309                 if (ret) {
 310                         printk(KERN_WARNING "ac.o: Unable to register misc device\n");
 311                         goto out;
 312                 }
 313                 for (i = 0; i < MAX_BOARD; i++) {
 314                         int serial;
 315                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
 316
 317                         if (!apbs[i].RamIO)
 318                                 continue;
 319
 320                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
 321                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
 322
 323                         boardname[serial] = 0;
 324
 325
 326                         printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
 327                                i+1, boardname,
 328                                (int)(readb(apbs[i].RamIO + VERS) >> 4),
 329                                (int)(readb(apbs[i].RamIO + VERS) & 0xF));
 330
 331                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
 332                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
 333                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
 334
 335                         if (serial != 0)
 336                                 printk(" S/N %d\n", serial);
 337                         else
 338                                 printk("\n");
 339                 }
 340                 return 0;
 341         }
 342
 343         else
 344                 return -ENXIO;
 345
 346 out:
 347         for (i = 0; i < MAX_BOARD; i++) {
 348                 if (!apbs[i].RamIO)
 349                         continue;
 350                 if (apbs[i].irq)
 351                         free_irq(apbs[i].irq, &dummy);
 352                 iounmap(apbs[i].RamIO);
 353         }
 354         pci_disable_device(dev);
 355         return ret;
 356 }
 357
 358
 359 #ifndef MODULE
 360 __initcall(applicom_init);
 361 #endif
 362
 363 static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
 364 {
 365         unsigned int NumCard;   /* Board number 1 -> 8           */
 366         unsigned int IndexCard; /* Index board number 0 -> 7     */
 367         unsigned char TicCard;  /* Board TIC to send             */
 368         unsigned long flags;    /* Current priority              */
 369         struct st_ram_io st_loc;
 370         struct mailbox tmpmailbox;
 371 #ifdef DEBUG
 372         int c;
 373 #endif
 374         DECLARE_WAITQUEUE(wait, current);
 375
 376         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
 377                 static int warncount = 5;
 378                 if (warncount) {
 379                         printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
 380                                count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
 381                         warncount--;
 382                 }
 383                 return -EINVAL;
 384         }
 385
 386         if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io)))
 387                 return -EFAULT;
 388
 389         if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
 390                           sizeof(struct mailbox)))
 391                 return -EFAULT;
 392
 393         NumCard = st_loc.num_card;      /* board number to send          */
 394         TicCard = st_loc.tic_des_from_pc;       /* tic number to send            */
 395         IndexCard = NumCard - 1;
 396
 397         if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
 398                 return -EINVAL;
 399
 400 #ifdef DEBUG
 401         printk("Write to applicom card #%d. struct st_ram_io follows:",
 402                IndexCard+1);
 403
 404                 for (c = 0; c < sizeof(struct st_ram_io);) {
 405
 406                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
 407
 408                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
 409                                 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
 410                         }
 411                 }
 412
 413                 printk("\nstruct mailbox follows:");
 414
 415                 for (c = 0; c < sizeof(struct mailbox);) {
 416                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
 417
 418                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
 419                                 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
 420                         }
 421                 }
 422
 423                 printk("\n");
 424 #endif
 425
 426         spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
 427
 428         /* Test octet ready correct */
 429         if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) {
 430                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
 431                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 432                 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
 433                        IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
 434                 DeviceErrorCount++;
 435                 return -EIO;
 436         }
 437
 438         /* Place ourselves on the wait queue */
 439         set_current_state(TASK_INTERRUPTIBLE);
 440         add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
 441
 442         /* Check whether the card is ready for us */
 443         while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
 444                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
 445                 /* It's busy. Sleep. */
 446
 447                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 448                 schedule();
 449                 if (signal_pending(current)) {
 450                         remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
 451                                           &wait);
 452                         return -EINTR;
 453                 }
 454                 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
 455                 set_current_state(TASK_INTERRUPTIBLE);
 456         }
 457
 458         /* We may not have actually slept */
 459         set_current_state(TASK_RUNNING);
 460         remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
 461
 462         writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 463
 464         /* Which is best - lock down the pages with rawio and then
 465            copy directly, or use bounce buffers? For now we do the latter
 466            because it works with 2.2 still */
 467         {
 468                 unsigned char *from = (unsigned char *) &tmpmailbox;
 469                 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
 470                 int c;
 471
 472                 for (c = 0; c < sizeof(struct mailbox); c++)
 473                         writeb(*(from++), to++);
 474         }
 475
 476         writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
 477         writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
 478         writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
 479         writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
 480         writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 481         writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 482         Dummy = readb(apbs[IndexCard].RamIO + VERS);
 483         spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 484         return 0;
 485 }
 486
 487 static int do_ac_read(int IndexCard, char __user *buf,
 488                 struct st_ram_io *st_loc, struct mailbox *mailbox)
 489 {
 490         void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
 491         unsigned char *to = (unsigned char *)&mailbox;
 492 #ifdef DEBUG
 493         int c;
 494 #endif
 495
 496         st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
 497         st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
 498
 499
 500         {
 501                 int c;
 502
 503                 for (c = 0; c < sizeof(struct mailbox); c++)
 504                         *(to++) = readb(from++);
 505         }
 506         writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
 507         writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
 508         writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
 509         writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC),
 510                apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
 511         writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
 512         writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
 513         writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 514         Dummy = readb(apbs[IndexCard].RamIO + VERS);
 515
 516 #ifdef DEBUG
 517                 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
 518
 519                 for (c = 0; c < sizeof(struct st_ram_io);) {
 520                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
 521
 522                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
 523                                 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
 524                         }
 525                 }
 526
 527                 printk("\nstruct mailbox follows:");
 528
 529                 for (c = 0; c < sizeof(struct mailbox);) {
 530                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
 531
 532                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
 533                                 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
 534                         }
 535                 }
 536                 printk("\n");
 537 #endif
 538         return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
 539 }
 540
 541 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
 542 {
 543         unsigned long flags;
 544         unsigned int i;
 545         unsigned char tmp;
 546         int ret = 0;
 547         DECLARE_WAITQUEUE(wait, current);
 548 #ifdef DEBUG
 549         int loopcount=0;
 550 #endif
 551         /* No need to ratelimit this. Only root can trigger it anyway */
 552         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
 553                 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
 554                         count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
 555                 return -EINVAL;
 556         }
 557
 558         while(1) {
 559                 /* Stick ourself on the wait queue */
 560                 set_current_state(TASK_INTERRUPTIBLE);
 561                 add_wait_queue(&FlagSleepRec, &wait);
 562
 563                 /* Scan each board, looking for one which has a packet for us */
 564                 for (i=0; i < MAX_BOARD; i++) {
 565                         if (!apbs[i].RamIO)
 566                                 continue;
 567                         spin_lock_irqsave(&apbs[i].mutex, flags);
 568
 569                         tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
 570
 571                         if (tmp == 2) {
 572                                 struct st_ram_io st_loc;
 573                                 struct mailbox mailbox;
 574
 575                                 /* Got a packet for us */
 576                                 ret = do_ac_read(i, buf, &st_loc, &mailbox);
 577                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
 578                                 set_current_state(TASK_RUNNING);
 579                                 remove_wait_queue(&FlagSleepRec, &wait);
 580
 581                                 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
 582                                         return -EFAULT;
 583                                 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
 584                                         return -EFAULT;
 585                                 return tmp;
 586                         }
 587
 588                         if (tmp > 2) {
 589                                 /* Got an error */
 590                                 Dummy = readb(apbs[i].RamIO + VERS);
 591
 592                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
 593                                 set_current_state(TASK_RUNNING);
 594                                 remove_wait_queue(&FlagSleepRec, &wait);
 595
 596                                 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
 597                                        i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
 598                                 DeviceErrorCount++;
 599                                 return -EIO;
 600                         }
 601
 602                         /* Nothing for us. Try the next board */
 603                         Dummy = readb(apbs[i].RamIO + VERS);
 604                         spin_unlock_irqrestore(&apbs[i].mutex, flags);
 605
 606                 } /* per board */
 607
 608                 /* OK - No boards had data for us. Sleep now */
 609
 610                 schedule();
 611                 remove_wait_queue(&FlagSleepRec, &wait);
 612
 613                 if (signal_pending(current))
 614                         return -EINTR;
 615
 616 #ifdef DEBUG
 617                 if (loopcount++ > 2) {
 618                         printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
 619                 }
 620 #endif
 621         }
 622 }
 623
 624 static irqreturn_t ac_interrupt(int vec, void *dev_instance, struct pt_regs *regs)
 625 {
 626         unsigned int i;
 627         unsigned int FlagInt;
 628         unsigned int LoopCount;
 629         int handled = 0;
 630
 631         //    printk("Applicom interrupt on IRQ %d occurred\n", vec);
 632
 633         LoopCount = 0;
 634
 635         do {
 636                 FlagInt = 0;
 637                 for (i = 0; i < MAX_BOARD; i++) {
 638
 639                         /* Skip if this board doesn't exist */
 640                         if (!apbs[i].RamIO)
 641                                 continue;
 642
 643                         spin_lock(&apbs[i].mutex);
 644
 645                         /* Skip if this board doesn't want attention */
 646                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
 647                                 spin_unlock(&apbs[i].mutex);
 648                                 continue;
 649                         }
 650
 651                         handled = 1;
 652                         FlagInt = 1;
 653                         writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
 654
 655                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
 656                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
 657                                        i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
 658                                 DeviceErrorCount++;
 659                         }
 660
 661                         if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) &&
 662                            (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
 663
 664                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
 665                                        i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
 666                                 DeviceErrorCount++;
 667                         }
 668
 669                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) {     /* mailbox sent by the card ?   */
 670                                 if (waitqueue_active(&FlagSleepRec)) {
 671                                 wake_up_interruptible(&FlagSleepRec);
 672                         }
 673                         }
 674
 675                         if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) {   /* ram i/o free for write by pc ? */
 676                                 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ?    */
 677                                         wake_up_interruptible(&apbs[i].FlagSleepSend);
 678                                 }
 679                         }
 680                         Dummy = readb(apbs[i].RamIO + VERS);
 681
 682                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
 683                                 /* There's another int waiting on this card */
 684                                 spin_unlock(&apbs[i].mutex);
 685                                 i--;
 686                         } else {
 687                                 spin_unlock(&apbs[i].mutex);
 688                         }
 689                 }
 690                 if (FlagInt)
 691                         LoopCount = 0;
 692                 else
 693                         LoopCount++;
 694         } while(LoopCount < 2);
 695         return IRQ_RETVAL(handled);
 696 }
 697
 698
 699
 700 static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
 701
 702 {                               /* @ ADG ou ATO selon le cas */
 703         int i;
 704         unsigned char IndexCard;
 705         void __iomem *pmem;
 706         int ret = 0;
 707         volatile unsigned char byte_reset_it;
 708         struct st_ram_io *adgl;
 709         void __user *argp = (void __user *)arg;
 710
 711         /* In general, the device is only openable by root anyway, so we're not
 712            particularly concerned that bogus ioctls can flood the console. */
 713
 714         adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL);
 715         if (!adgl)
 716                 return -ENOMEM;
 717
 718         if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) {
 719                 kfree(adgl);
 720                 return -EFAULT;
 721         }
 722
 723         IndexCard = adgl->num_card-1;
 724
 725         if(cmd != 0 && cmd != 6 &&
 726            ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
 727                 static int warncount = 10;
 728                 if (warncount) {
 729                         printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
 730                         warncount--;
 731                 }
 732                 kfree(adgl);
 733                 return -EINVAL;
 734         }
 735
 736         switch (cmd) {
 737
 738         case 0:
 739                 pmem = apbs[IndexCard].RamIO;
 740                 for (i = 0; i < sizeof(struct st_ram_io); i++)
 741                         ((unsigned char *)adgl)[i]=readb(pmem++);
 742                 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
 743                         ret = -EFAULT;
 744                 break;
 745         case 1:
 746                 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
 747                 for (i = 0; i < 4; i++)
 748                         adgl->conf_end_test[i] = readb(pmem++);
 749                 for (i = 0; i < 2; i++)
 750                         adgl->error_code[i] = readb(pmem++);
 751                 for (i = 0; i < 4; i++)
 752                         adgl->parameter_error[i] = readb(pmem++);
 753                 pmem = apbs[IndexCard].RamIO + VERS;
 754                 adgl->vers = readb(pmem);
 755                 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
 756                 for (i = 0; i < 20; i++)
 757                         adgl->reserv1[i] = readb(pmem++);
 758                 *(int *)&adgl->reserv1[20] =
 759                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
 760                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
 761                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
 762
 763                 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
 764                         ret = -EFAULT;
 765                 break;
 766         case 2:
 767                 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
 768                 for (i = 0; i < 10; i++)
 769                         writeb(0xff, pmem++);
 770                 writeb(adgl->data_from_pc_ready,
 771                        apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 772
 773                 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 774
 775                 for (i = 0; i < MAX_BOARD; i++) {
 776                         if (apbs[i].RamIO) {
 777                                 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
 778                         }
 779                 }
 780                 break;
 781         case 3:
 782                 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
 783                 writeb(adgl->tic_des_from_pc, pmem);
 784                 break;
 785         case 4:
 786                 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
 787                 adgl->tic_owner_to_pc     = readb(pmem++);
 788                 adgl->numcard_owner_to_pc = readb(pmem);
 789                 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
 790                         ret = -EFAULT;
 791                 break;
 792         case 5:
 793                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
 794                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
 795                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
 796                 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 797                 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 798                 break;
 799         case 6:
 800                 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
 801                 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
 802                 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
 803                 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
 804                 for (i = 0; i < MAX_BOARD; i++) {
 805                         int serial;
 806                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
 807
 808                         if (!apbs[i].RamIO)
 809                                 continue;
 810
 811                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
 812                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
 813                         boardname[serial] = 0;
 814
 815                         printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
 816                                i+1,
 817                                (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4),
 818                                (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF),
 819                                boardname);
 820
 821
 822                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
 823                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
 824                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
 825
 826                         if (serial != 0)
 827                                 printk(" S/N %d\n", serial);
 828                         else
 829                                 printk("\n");
 830                 }
 831                 if (DeviceErrorCount != 0)
 832                         printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
 833                 if (ReadErrorCount != 0)
 834                         printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
 835                 if (WriteErrorCount != 0)
 836                         printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
 837                 if (waitqueue_active(&FlagSleepRec))
 838                         printk(KERN_INFO "Process in read pending\n");
 839                 for (i = 0; i < MAX_BOARD; i++) {
 840                         if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
 841                                 printk(KERN_INFO "Process in write pending board %d\n",i+1);
 842                 }
 843                 break;
 844         default:
 845                 printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ;
 846                 ret = -EINVAL;
 847                 break;
 848         }
 849         Dummy = readb(apbs[IndexCard].RamIO + VERS);
 850         kfree(adgl);
 851         return 0;
 852 }
 853
 854 #ifndef MODULE
 855 static int __init applicom_setup(char *str)
 856 {
 857         int ints[4];
 858
 859         (void) get_options(str, 4, ints);
 860
 861         if (ints[0] > 2) {
 862                 printk(KERN_WARNING "Too many arguments to 'applicom=', expected mem,irq only.\n");
 863         }
 864
 865         if (ints[0] < 2) {
 866                 printk(KERN_INFO"applicom numargs: %d\n", ints[0]);
 867                 return 0;
 868         }
 869
 870         mem = ints[1];
 871         irq = ints[2];
 872         return 1;
 873 }
 874
 875 __setup("applicom=", applicom_setup);
 876
 877 #endif                          /* MODULE */
 878