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 <linux/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        return ret;
 349}
 350
 351module_init(applicom_init);
 352module_exit(applicom_exit);
 353
 354
 355static ssize_t ac_write(struct file *file, const char __user *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 %zd != expected %zd\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                void __iomem *to = 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
 479static int do_ac_read(int IndexCard, char __user *buf,
 480                struct st_ram_io *st_loc, struct mailbox *mailbox)
 481{
 482        void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
 483        unsigned char *to = (unsigned char *)mailbox;
 484#ifdef DEBUG
 485        int c;
 486#endif
 487
 488        st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
 489        st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
 490
 491
 492        {
 493                int c;
 494
 495                for (c = 0; c < sizeof(struct mailbox); c++)
 496                        *(to++) = readb(from++);
 497        }
 498        writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
 499        writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
 500        writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
 501        writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), 
 502               apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
 503        writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
 504        writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
 505        writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
 506        Dummy = readb(apbs[IndexCard].RamIO + VERS);
 507
 508#ifdef DEBUG
 509                printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
 510
 511                for (c = 0; c < sizeof(struct st_ram_io);) {
 512                        printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
 513
 514                        for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
 515                                printk(" %2.2X", ((unsigned char *)st_loc)[c]);
 516                        }
 517                }
 518
 519                printk("\nstruct mailbox follows:");
 520
 521                for (c = 0; c < sizeof(struct mailbox);) {
 522                        printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
 523
 524                        for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
 525                                printk(" %2.2X", ((unsigned char *)mailbox)[c]);
 526                        }
 527                }
 528                printk("\n");
 529#endif
 530        return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
 531}
 532
 533static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
 534{
 535        unsigned long flags;
 536        unsigned int i;
 537        unsigned char tmp;
 538        int ret = 0;
 539        DECLARE_WAITQUEUE(wait, current);
 540#ifdef DEBUG
 541        int loopcount=0;
 542#endif
 543        /* No need to ratelimit this. Only root can trigger it anyway */
 544        if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
 545                printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
 546                        count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
 547                return -EINVAL;
 548        }
 549        
 550        while(1) {
 551                /* Stick ourself on the wait queue */
 552                set_current_state(TASK_INTERRUPTIBLE);
 553                add_wait_queue(&FlagSleepRec, &wait);
 554                
 555                /* Scan each board, looking for one which has a packet for us */
 556                for (i=0; i < MAX_BOARD; i++) {
 557                        if (!apbs[i].RamIO)
 558                                continue;
 559                        spin_lock_irqsave(&apbs[i].mutex, flags);
 560                        
 561                        tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
 562                        
 563                        if (tmp == 2) {
 564                                struct st_ram_io st_loc;
 565                                struct mailbox mailbox;
 566
 567                                /* Got a packet for us */
 568                                memset(&st_loc, 0, sizeof(st_loc));
 569                                ret = do_ac_read(i, buf, &st_loc, &mailbox);
 570                                spin_unlock_irqrestore(&apbs[i].mutex, flags);
 571                                set_current_state(TASK_RUNNING);
 572                                remove_wait_queue(&FlagSleepRec, &wait);
 573
 574                                if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
 575                                        return -EFAULT;
 576                                if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
 577                                        return -EFAULT;
 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(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
 612                }
 613#endif
 614        } 
 615}
 616
 617static irqreturn_t ac_interrupt(int vec, void *dev_instance)
 618{
 619        unsigned int i;
 620        unsigned int FlagInt;
 621        unsigned int LoopCount;
 622        int handled = 0;
 623
 624        //    printk("Applicom interrupt on IRQ %d occurred\n", vec);
 625
 626        LoopCount = 0;
 627
 628        do {
 629                FlagInt = 0;
 630                for (i = 0; i < MAX_BOARD; i++) {
 631                        
 632                        /* Skip if this board doesn't exist */
 633                        if (!apbs[i].RamIO)
 634                                continue;
 635
 636                        spin_lock(&apbs[i].mutex);
 637
 638                        /* Skip if this board doesn't want attention */
 639                        if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
 640                                spin_unlock(&apbs[i].mutex);
 641                                continue;
 642                        }
 643
 644                        handled = 1;
 645                        FlagInt = 1;
 646                        writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
 647
 648                        if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
 649                                printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
 650                                       i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
 651                                DeviceErrorCount++;
 652                        }
 653
 654                        if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && 
 655                           (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
 656                                
 657                                printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
 658                                       i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
 659                                DeviceErrorCount++;
 660                        }
 661
 662                        if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) {     /* mailbox sent by the card ?   */
 663                                if (waitqueue_active(&FlagSleepRec)) {
 664                                wake_up_interruptible(&FlagSleepRec);
 665                        }
 666                        }
 667
 668                        if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) {   /* ram i/o free for write by pc ? */
 669                                if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ?    */
 670                                        wake_up_interruptible(&apbs[i].FlagSleepSend);
 671                                }
 672                        }
 673                        Dummy = readb(apbs[i].RamIO + VERS);
 674
 675                        if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
 676                                /* There's another int waiting on this card */
 677                                spin_unlock(&apbs[i].mutex);
 678                                i--;
 679                        } else {
 680                                spin_unlock(&apbs[i].mutex);
 681                        }
 682                }
 683                if (FlagInt)
 684                        LoopCount = 0;
 685                else
 686                        LoopCount++;
 687        } while(LoopCount < 2);
 688        return IRQ_RETVAL(handled);
 689}
 690
 691
 692
 693static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 694     
 695{                               /* @ ADG ou ATO selon le cas */
 696        int i;
 697        unsigned char IndexCard;
 698        void __iomem *pmem;
 699        int ret = 0;
 700        volatile unsigned char byte_reset_it;
 701        struct st_ram_io *adgl;
 702        void __user *argp = (void __user *)arg;
 703
 704        /* In general, the device is only openable by root anyway, so we're not
 705           particularly concerned that bogus ioctls can flood the console. */
 706
 707        adgl = memdup_user(argp, sizeof(struct st_ram_io));
 708        if (IS_ERR(adgl))
 709                return PTR_ERR(adgl);
 710
 711        mutex_lock(&ac_mutex);  
 712        IndexCard = adgl->num_card-1;
 713         
 714        if(cmd != 6 && ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
 715                static int warncount = 10;
 716                if (warncount) {
 717                        printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
 718                        warncount--;
 719                }
 720                kfree(adgl);
 721                mutex_unlock(&ac_mutex);
 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(argp, 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(argp, 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(argp, 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: 1.30 $)\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[i].RamIO + VERS) >> 4),
 807                               (int)(readb(apbs[i].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                ret = -ENOTTY;
 835                break;
 836        }
 837        Dummy = readb(apbs[IndexCard].RamIO + VERS);
 838        kfree(adgl);
 839        mutex_unlock(&ac_mutex);
 840        return 0;
 841}
 842
 843
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