linux/drivers/char/applicom.c
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   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/* addresses 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/sched.h>
  27#include <linux/slab.h>
  28#include <linux/errno.h>
  29#include <linux/mutex.h>
  30#include <linux/miscdevice.h>
  31#include <linux/pci.h>
  32#include <linux/wait.h>
  33#include <linux/init.h>
  34#include <linux/fs.h>
  35
  36#include <asm/io.h>
  37#include <asm/uaccess.h>
  38
  39#include "applicom.h"
  40
  41
  42/* NOTE: We use for loops with {write,read}b() instead of 
  43   memcpy_{from,to}io throughout this driver. This is because
  44   the board doesn't correctly handle word accesses - only
  45   bytes. 
  46*/
  47
  48
  49#undef DEBUG
  50
  51#define MAX_BOARD 8             /* maximum of pc board possible */
  52#define MAX_ISA_BOARD 4
  53#define LEN_RAM_IO 0x800
  54#define AC_MINOR 157
  55
  56#ifndef PCI_VENDOR_ID_APPLICOM
  57#define PCI_VENDOR_ID_APPLICOM                0x1389
  58#define PCI_DEVICE_ID_APPLICOM_PCIGENERIC     0x0001
  59#define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
  60#define PCI_DEVICE_ID_APPLICOM_PCI2000PFB     0x0003
  61#endif
  62
  63static DEFINE_MUTEX(ac_mutex);
  64static char *applicom_pci_devnames[] = {
  65        "PCI board",
  66        "PCI2000IBS / PCI2000CAN",
  67        "PCI2000PFB"
  68};
  69
  70static struct pci_device_id applicom_pci_tbl[] = {
  71        { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) },
  72        { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) },
  73        { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) },
  74        { 0 }
  75};
  76MODULE_DEVICE_TABLE(pci, applicom_pci_tbl);
  77
  78MODULE_AUTHOR("David Woodhouse & Applicom International");
  79MODULE_DESCRIPTION("Driver for Applicom Profibus card");
  80MODULE_LICENSE("GPL");
  81MODULE_ALIAS_MISCDEV(AC_MINOR);
  82
  83MODULE_SUPPORTED_DEVICE("ac");
  84
  85
  86static 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
  94static unsigned int irq = 0;    /* interrupt number IRQ       */
  95static unsigned long mem = 0;   /* physical segment of board  */
  96
  97module_param(irq, uint, 0);
  98MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
  99module_param(mem, ulong, 0);
 100MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
 101
 102static unsigned int numboards;  /* number of installed boards */
 103static volatile unsigned char Dummy;
 104static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
 105static unsigned int WriteErrorCount;    /* number of write error      */
 106static unsigned int ReadErrorCount;     /* number of read error       */
 107static unsigned int DeviceErrorCount;   /* number of device error     */
 108
 109static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
 110static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
 111static long ac_ioctl(struct file *, unsigned int, unsigned long);
 112static irqreturn_t ac_interrupt(int, void *);
 113
 114static const struct file_operations ac_fops = {
 115        .owner = THIS_MODULE,
 116        .llseek = no_llseek,
 117        .read = ac_read,
 118        .write = ac_write,
 119        .unlocked_ioctl = ac_ioctl,
 120};
 121
 122static struct miscdevice ac_miscdev = {
 123        AC_MINOR,
 124        "ac",
 125        &ac_fops
 126};
 127
 128static int dummy;       /* dev_id for request_irq() */
 129
 130static int ac_register_board(unsigned long physloc, void __iomem *loc, 
 131                      unsigned char boardno)
 132{
 133        volatile unsigned char byte_reset_it;
 134
 135        if((readb(loc + CONF_END_TEST)     != 0x00) ||
 136           (readb(loc + CONF_END_TEST + 1) != 0x55) ||
 137           (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
 138           (readb(loc + CONF_END_TEST + 3) != 0xFF))
 139                return 0;
 140
 141        if (!boardno)
 142                boardno = readb(loc + NUMCARD_OWNER_TO_PC);
 143
 144        if (!boardno || boardno > MAX_BOARD) {
 145                printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
 146                       boardno, physloc, MAX_BOARD);
 147                return 0;
 148        }
 149
 150        if (apbs[boardno - 1].RamIO) {
 151                printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n", 
 152                       boardno, physloc, boardno, apbs[boardno-1].PhysIO);
 153                return 0;
 154        }
 155
 156        boardno--;
 157
 158        apbs[boardno].PhysIO = physloc;
 159        apbs[boardno].RamIO = loc;
 160        init_waitqueue_head(&apbs[boardno].FlagSleepSend);
 161        spin_lock_init(&apbs[boardno].mutex);
 162        byte_reset_it = readb(loc + RAM_IT_TO_PC);
 163
 164        numboards++;
 165        return boardno + 1;
 166}
 167
 168static void __exit applicom_exit(void)
 169{
 170        unsigned int i;
 171
 172        misc_deregister(&ac_miscdev);
 173
 174        for (i = 0; i < MAX_BOARD; i++) {
 175
 176                if (!apbs[i].RamIO)
 177                        continue;
 178
 179                if (apbs[i].irq)
 180                        free_irq(apbs[i].irq, &dummy);
 181
 182                iounmap(apbs[i].RamIO);
 183        }
 184}
 185
 186static int __init applicom_init(void)
 187{
 188        int i, numisa = 0;
 189        struct pci_dev *dev = NULL;
 190        void __iomem *RamIO;
 191        int boardno, ret;
 192
 193        printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
 194
 195        /* No mem and irq given - check for a PCI card */
 196
 197        while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
 198
 199                if (!pci_match_id(applicom_pci_tbl, dev))
 200                        continue;
 201                
 202                if (pci_enable_device(dev))
 203                        return -EIO;
 204
 205                RamIO = ioremap_nocache(pci_resource_start(dev, 0), LEN_RAM_IO);
 206
 207                if (!RamIO) {
 208                        printk(KERN_INFO "ac.o: Failed to ioremap PCI memory "
 209                                "space at 0x%llx\n",
 210                                (unsigned long long)pci_resource_start(dev, 0));
 211                        pci_disable_device(dev);
 212                        return -EIO;
 213                }
 214
 215                printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n",
 216                       applicom_pci_devnames[dev->device-1],
 217                           (unsigned long long)pci_resource_start(dev, 0),
 218                       dev->irq);
 219
 220                boardno = ac_register_board(pci_resource_start(dev, 0),
 221                                RamIO, 0);
 222                if (!boardno) {
 223                        printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
 224                        iounmap(RamIO);
 225                        pci_disable_device(dev);
 226                        continue;
 227                }
 228
 229                if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) {
 230                        printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
 231                        iounmap(RamIO);
 232                        pci_disable_device(dev);
 233                        apbs[boardno - 1].RamIO = NULL;
 234                        continue;
 235                }
 236
 237                /* Enable interrupts. */
 238
 239                writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
 240
 241                apbs[boardno - 1].irq = dev->irq;
 242        }
 243
 244        /* Finished with PCI cards. If none registered, 
 245         * and there was no mem/irq specified, exit */
 246
 247        if (!mem || !irq) {
 248                if (numboards)
 249                        goto fin;
 250                else {
 251                        printk(KERN_INFO "ac.o: No PCI boards found.\n");
 252                        printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
 253                        return -ENXIO;
 254                }
 255        }
 256
 257        /* Now try the specified ISA cards */
 258
 259        for (i = 0; i < MAX_ISA_BOARD; i++) {
 260                RamIO = ioremap_nocache(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
 261
 262                if (!RamIO) {
 263                        printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
 264                        continue;
 265                }
 266
 267                if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
 268                                                  RamIO,i+1))) {
 269                        iounmap(RamIO);
 270                        continue;
 271                }
 272
 273                printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
 274
 275                if (!numisa) {
 276                        if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) {
 277                                printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
 278                                iounmap(RamIO);
 279                                apbs[boardno - 1].RamIO = NULL;
 280                        }
 281                        else
 282                                apbs[boardno - 1].irq = irq;
 283                }
 284                else
 285                        apbs[boardno - 1].irq = 0;
 286
 287                numisa++;
 288        }
 289
 290        if (!numisa)
 291                printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
 292                                "at mem 0x%lx\n", mem);
 293
 294 fin:
 295        init_waitqueue_head(&FlagSleepRec);
 296
 297        WriteErrorCount = 0;
 298        ReadErrorCount = 0;
 299        DeviceErrorCount = 0;
 300
 301        if (numboards) {
 302                ret = misc_register(&ac_miscdev);
 303                if (ret) {
 304                        printk(KERN_WARNING "ac.o: Unable to register misc device\n");
 305                        goto out;
 306                }
 307                for (i = 0; i < MAX_BOARD; i++) {
 308                        int serial;
 309                        char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
 310
 311                        if (!apbs[i].RamIO)
 312                                continue;
 313
 314                        for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
 315                                boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
 316
 317                        boardname[serial] = 0;
 318
 319
 320                        printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
 321                               i+1, boardname,
 322                               (int)(readb(apbs[i].RamIO + VERS) >> 4),
 323                               (int)(readb(apbs[i].RamIO + VERS) & 0xF));
 324                        
 325                        serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 
 326                                (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 
 327                                (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
 328
 329                        if (serial != 0)
 330                                printk(" S/N %d\n", serial);
 331                        else
 332                                printk("\n");
 333                }
 334                return 0;
 335        }
 336
 337        else
 338                return -ENXIO;
 339
 340out:
 341        for (i = 0; i < MAX_BOARD; i++) {
 342                if (!apbs[i].RamIO)
 343                        continue;
 344                if (apbs[i].irq)
 345                        free_irq(apbs[i].irq, &dummy);
 346                iounmap(apbs[i].RamIO);
 347        }
 348        pci_disable_device(dev);
 349        return ret;
 350}
 351
 352module_init(applicom_init);
 353module_exit(applicom_exit);
 354
 355
 356static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
 357{
 358        unsigned int NumCard;   /* Board number 1 -> 8           */
 359        unsigned int IndexCard; /* Index board number 0 -> 7     */
 360        unsigned char TicCard;  /* Board TIC to send             */
 361        unsigned long flags;    /* Current priority              */
 362        struct st_ram_io st_loc;
 363        struct mailbox tmpmailbox;
 364#ifdef DEBUG
 365        int c;
 366#endif
 367        DECLARE_WAITQUEUE(wait, current);
 368
 369        if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
 370                static int warncount = 5;
 371                if (warncount) {
 372                        printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
 373                               count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
 374                        warncount--;
 375                }
 376                return -EINVAL;
 377        }
 378
 379        if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io))) 
 380                return -EFAULT;
 381        
 382        if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
 383                          sizeof(struct mailbox))) 
 384                return -EFAULT;
 385
 386        NumCard = st_loc.num_card;      /* board number to send          */
 387        TicCard = st_loc.tic_des_from_pc;       /* tic number to send            */
 388        IndexCard = NumCard - 1;
 389
 390        if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
 391                return -EINVAL;
 392
 393#ifdef DEBUG
 394        printk("Write to applicom card #%d. struct st_ram_io follows:",
 395               IndexCard+1);
 396
 397                for (c = 0; c < sizeof(struct st_ram_io);) {
 398                
 399                        printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
 400
 401                        for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
 402                                printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
 403                        }
 404                }
 405
 406                printk("\nstruct mailbox follows:");
 407
 408                for (c = 0; c < sizeof(struct mailbox);) {
 409                        printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
 410
 411                        for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
 412                                printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
 413                        }
 414                }
 415
 416                printk("\n");
 417#endif
 418
 419        spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
 420
 421        /* Test octet ready correct */
 422        if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { 
 423                Dummy = readb(apbs[IndexCard].RamIO + VERS);
 424                spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 425                printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
 426                       IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
 427                DeviceErrorCount++;
 428                return -EIO;
 429        }
 430        
 431        /* Place ourselves on the wait queue */
 432        set_current_state(TASK_INTERRUPTIBLE);
 433        add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
 434
 435        /* Check whether the card is ready for us */
 436        while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
 437                Dummy = readb(apbs[IndexCard].RamIO + VERS);
 438                /* It's busy. Sleep. */
 439
 440                spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 441                schedule();
 442                if (signal_pending(current)) {
 443                        remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
 444                                          &wait);
 445                        return -EINTR;
 446                }
 447                spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
 448                set_current_state(TASK_INTERRUPTIBLE);
 449        }
 450
 451        /* We may not have actually slept */
 452        set_current_state(TASK_RUNNING);
 453        remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
 454
 455        writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 456
 457        /* Which is best - lock down the pages with rawio and then
 458           copy directly, or use bounce buffers? For now we do the latter 
 459           because it works with 2.2 still */
 460        {
 461                unsigned char *from = (unsigned char *) &tmpmailbox;
 462                void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
 463                int c;
 464
 465                for (c = 0; c < sizeof(struct mailbox); c++)
 466                        writeb(*(from++), to++);
 467        }
 468
 469        writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
 470        writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
 471        writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
 472        writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
 473        writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 474        writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 475        Dummy = readb(apbs[IndexCard].RamIO + VERS);
 476        spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
 477        return 0;
 478}
 479
 480static int do_ac_read(int IndexCard, char __user *buf,
 481                struct st_ram_io *st_loc, struct mailbox *mailbox)
 482{
 483        void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
 484        unsigned char *to = (unsigned char *)mailbox;
 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 *)mailbox)[c]);
 524
 525                        for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
 526                                printk(" %2.2X", ((unsigned char *)mailbox)[c]);
 527                        }
 528                }
 529                printk("\n");
 530#endif
 531        return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
 532}
 533
 534static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
 535{
 536        unsigned long flags;
 537        unsigned int i;
 538        unsigned char tmp;
 539        int ret = 0;
 540        DECLARE_WAITQUEUE(wait, current);
 541#ifdef DEBUG
 542        int loopcount=0;
 543#endif
 544        /* No need to ratelimit this. Only root can trigger it anyway */
 545        if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
 546                printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
 547                        count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
 548                return -EINVAL;
 549        }
 550        
 551        while(1) {
 552                /* Stick ourself on the wait queue */
 553                set_current_state(TASK_INTERRUPTIBLE);
 554                add_wait_queue(&FlagSleepRec, &wait);
 555                
 556                /* Scan each board, looking for one which has a packet for us */
 557                for (i=0; i < MAX_BOARD; i++) {
 558                        if (!apbs[i].RamIO)
 559                                continue;
 560                        spin_lock_irqsave(&apbs[i].mutex, flags);
 561                        
 562                        tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
 563                        
 564                        if (tmp == 2) {
 565                                struct st_ram_io st_loc;
 566                                struct mailbox mailbox;
 567
 568                                /* Got a packet for us */
 569                                memset(&st_loc, 0, sizeof(st_loc));
 570                                ret = do_ac_read(i, buf, &st_loc, &mailbox);
 571                                spin_unlock_irqrestore(&apbs[i].mutex, flags);
 572                                set_current_state(TASK_RUNNING);
 573                                remove_wait_queue(&FlagSleepRec, &wait);
 574
 575                                if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
 576                                        return -EFAULT;
 577                                if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
 578                                        return -EFAULT;
 579                                return tmp;
 580                        }
 581                        
 582                        if (tmp > 2) {
 583                                /* Got an error */
 584                                Dummy = readb(apbs[i].RamIO + VERS);
 585                                
 586                                spin_unlock_irqrestore(&apbs[i].mutex, flags);
 587                                set_current_state(TASK_RUNNING);
 588                                remove_wait_queue(&FlagSleepRec, &wait);
 589                                
 590                                printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
 591                                       i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
 592                                DeviceErrorCount++;
 593                                return -EIO;
 594                        }
 595                        
 596                        /* Nothing for us. Try the next board */
 597                        Dummy = readb(apbs[i].RamIO + VERS);
 598                        spin_unlock_irqrestore(&apbs[i].mutex, flags);
 599                        
 600                } /* per board */
 601
 602                /* OK - No boards had data for us. Sleep now */
 603
 604                schedule();
 605                remove_wait_queue(&FlagSleepRec, &wait);
 606
 607                if (signal_pending(current))
 608                        return -EINTR;
 609
 610#ifdef DEBUG
 611                if (loopcount++ > 2) {
 612                        printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
 613                }
 614#endif
 615        } 
 616}
 617
 618static irqreturn_t ac_interrupt(int vec, void *dev_instance)
 619{
 620        unsigned int i;
 621        unsigned int FlagInt;
 622        unsigned int LoopCount;
 623        int handled = 0;
 624
 625        //    printk("Applicom interrupt on IRQ %d occurred\n", vec);
 626
 627        LoopCount = 0;
 628
 629        do {
 630                FlagInt = 0;
 631                for (i = 0; i < MAX_BOARD; i++) {
 632                        
 633                        /* Skip if this board doesn't exist */
 634                        if (!apbs[i].RamIO)
 635                                continue;
 636
 637                        spin_lock(&apbs[i].mutex);
 638
 639                        /* Skip if this board doesn't want attention */
 640                        if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
 641                                spin_unlock(&apbs[i].mutex);
 642                                continue;
 643                        }
 644
 645                        handled = 1;
 646                        FlagInt = 1;
 647                        writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
 648
 649                        if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
 650                                printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
 651                                       i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
 652                                DeviceErrorCount++;
 653                        }
 654
 655                        if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && 
 656                           (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
 657                                
 658                                printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
 659                                       i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
 660                                DeviceErrorCount++;
 661                        }
 662
 663                        if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) {     /* mailbox sent by the card ?   */
 664                                if (waitqueue_active(&FlagSleepRec)) {
 665                                wake_up_interruptible(&FlagSleepRec);
 666                        }
 667                        }
 668
 669                        if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) {   /* ram i/o free for write by pc ? */
 670                                if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ?    */
 671                                        wake_up_interruptible(&apbs[i].FlagSleepSend);
 672                                }
 673                        }
 674                        Dummy = readb(apbs[i].RamIO + VERS);
 675
 676                        if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
 677                                /* There's another int waiting on this card */
 678                                spin_unlock(&apbs[i].mutex);
 679                                i--;
 680                        } else {
 681                                spin_unlock(&apbs[i].mutex);
 682                        }
 683                }
 684                if (FlagInt)
 685                        LoopCount = 0;
 686                else
 687                        LoopCount++;
 688        } while(LoopCount < 2);
 689        return IRQ_RETVAL(handled);
 690}
 691
 692
 693
 694static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 695     
 696{                               /* @ ADG ou ATO selon le cas */
 697        int i;
 698        unsigned char IndexCard;
 699        void __iomem *pmem;
 700        int ret = 0;
 701        volatile unsigned char byte_reset_it;
 702        struct st_ram_io *adgl;
 703        void __user *argp = (void __user *)arg;
 704
 705        /* In general, the device is only openable by root anyway, so we're not
 706           particularly concerned that bogus ioctls can flood the console. */
 707
 708        adgl = memdup_user(argp, sizeof(struct st_ram_io));
 709        if (IS_ERR(adgl))
 710                return PTR_ERR(adgl);
 711
 712        mutex_lock(&ac_mutex);  
 713        IndexCard = adgl->num_card-1;
 714         
 715        if(cmd != 6 && ((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                mutex_unlock(&ac_mutex);
 723                return -EINVAL;
 724        }
 725
 726        switch (cmd) {
 727                
 728        case 0:
 729                pmem = apbs[IndexCard].RamIO;
 730                for (i = 0; i < sizeof(struct st_ram_io); i++)
 731                        ((unsigned char *)adgl)[i]=readb(pmem++);
 732                if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
 733                        ret = -EFAULT;
 734                break;
 735        case 1:
 736                pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
 737                for (i = 0; i < 4; i++)
 738                        adgl->conf_end_test[i] = readb(pmem++);
 739                for (i = 0; i < 2; i++)
 740                        adgl->error_code[i] = readb(pmem++);
 741                for (i = 0; i < 4; i++)
 742                        adgl->parameter_error[i] = readb(pmem++);
 743                pmem = apbs[IndexCard].RamIO + VERS;
 744                adgl->vers = readb(pmem);
 745                pmem = apbs[IndexCard].RamIO + TYPE_CARD;
 746                for (i = 0; i < 20; i++)
 747                        adgl->reserv1[i] = readb(pmem++);
 748                *(int *)&adgl->reserv1[20] =  
 749                        (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + 
 750                        (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + 
 751                        (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
 752
 753                if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
 754                        ret = -EFAULT;
 755                break;
 756        case 2:
 757                pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
 758                for (i = 0; i < 10; i++)
 759                        writeb(0xff, pmem++);
 760                writeb(adgl->data_from_pc_ready, 
 761                       apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 762
 763                writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 764                
 765                for (i = 0; i < MAX_BOARD; i++) {
 766                        if (apbs[i].RamIO) {
 767                                byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
 768                        }
 769                }
 770                break;
 771        case 3:
 772                pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
 773                writeb(adgl->tic_des_from_pc, pmem);
 774                break;
 775        case 4:
 776                pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
 777                adgl->tic_owner_to_pc     = readb(pmem++);
 778                adgl->numcard_owner_to_pc = readb(pmem);
 779                if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
 780                        ret = -EFAULT;
 781                break;
 782        case 5:
 783                writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
 784                writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
 785                writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
 786                writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
 787                writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 788                break;
 789        case 6:
 790                printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
 791                printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
 792                printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
 793                printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
 794                for (i = 0; i < MAX_BOARD; i++) {
 795                        int serial;
 796                        char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
 797
 798                        if (!apbs[i].RamIO)
 799                                continue;
 800
 801                        for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
 802                                boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
 803                        boardname[serial] = 0;
 804
 805                        printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
 806                               i+1,
 807                               (int)(readb(apbs[i].RamIO + VERS) >> 4),
 808                               (int)(readb(apbs[i].RamIO + VERS) & 0xF),
 809                               boardname);
 810
 811
 812                        serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 
 813                                (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 
 814                                (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
 815
 816                        if (serial != 0)
 817                                printk(" S/N %d\n", serial);
 818                        else
 819                                printk("\n");
 820                }
 821                if (DeviceErrorCount != 0)
 822                        printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
 823                if (ReadErrorCount != 0)
 824                        printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
 825                if (WriteErrorCount != 0)
 826                        printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
 827                if (waitqueue_active(&FlagSleepRec))
 828                        printk(KERN_INFO "Process in read pending\n");
 829                for (i = 0; i < MAX_BOARD; i++) {
 830                        if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
 831                                printk(KERN_INFO "Process in write pending board %d\n",i+1);
 832                }
 833                break;
 834        default:
 835                ret = -ENOTTY;
 836                break;
 837        }
 838        Dummy = readb(apbs[IndexCard].RamIO + VERS);
 839        kfree(adgl);
 840        mutex_unlock(&ac_mutex);
 841        return 0;
 842}
 843
 844
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