drivers/char/pcmcia/cm4040_cs.c

   1 /*
   2  * A driver for the Omnikey PCMCIA smartcard reader CardMan 4040
   3  *
   4  * (c) 2000-2004 Omnikey AG (http://www.omnikey.com/)
   5  *
   6  * (C) 2005-2006 Harald Welte <laforge@gnumonks.org>
   7  *      - add support for poll()
   8  *      - driver cleanup
   9  *      - add waitqueues
  10  *      - adhere to linux kernel coding style and policies
  11  *      - support 2.6.13 "new style" pcmcia interface
  12  *      - add class interface for udev device creation
  13  *
  14  * The device basically is a USB CCID compliant device that has been
  15  * attached to an I/O-Mapped FIFO.
  16  *
  17  * All rights reserved, Dual BSD/GPL Licensed.
  18  */
  19
  20 #include <linux/kernel.h>
  21 #include <linux/module.h>
  22 #include <linux/slab.h>
  23 #include <linux/init.h>
  24 #include <linux/fs.h>
  25 #include <linux/delay.h>
  26 #include <linux/poll.h>
  27 #include <linux/smp_lock.h>
  28 #include <linux/wait.h>
  29 #include <asm/uaccess.h>
  30 #include <asm/io.h>
  31
  32 #include <pcmcia/cistpl.h>
  33 #include <pcmcia/cisreg.h>
  34 #include <pcmcia/ciscode.h>
  35 #include <pcmcia/ds.h>
  36
  37 #include "cm4040_cs.h"
  38
  39
  40 #define reader_to_dev(x)        (&x->p_dev->dev)
  41
  42 /* n (debug level) is ignored */
  43 /* additional debug output may be enabled by re-compiling with
  44  * CM4040_DEBUG set */
  45 /* #define CM4040_DEBUG */
  46 #define DEBUGP(n, rdr, x, args...) do {                 \
  47                 dev_dbg(reader_to_dev(rdr), "%s:" x,    \
  48                            __func__ , ## args);         \
  49         } while (0)
  50
  51 static char *version =
  52 "OMNIKEY CardMan 4040 v1.1.0gm5 - All bugs added by Harald Welte";
  53
  54 #define CCID_DRIVER_BULK_DEFAULT_TIMEOUT        (150*HZ)
  55 #define CCID_DRIVER_ASYNC_POWERUP_TIMEOUT       (35*HZ)
  56 #define CCID_DRIVER_MINIMUM_TIMEOUT             (3*HZ)
  57 #define READ_WRITE_BUFFER_SIZE 512
  58 #define POLL_LOOP_COUNT                         1000
  59
  60 /* how often to poll for fifo status change */
  61 #define POLL_PERIOD                             msecs_to_jiffies(10)
  62
  63 static void reader_release(struct pcmcia_device *link);
  64
  65 static int major;
  66 static struct class *cmx_class;
  67
  68 #define         BS_READABLE     0x01
  69 #define         BS_WRITABLE     0x02
  70
  71 struct reader_dev {
  72         struct pcmcia_device    *p_dev;
  73         wait_queue_head_t       devq;
  74         wait_queue_head_t       poll_wait;
  75         wait_queue_head_t       read_wait;
  76         wait_queue_head_t       write_wait;
  77         unsigned long           buffer_status;
  78         unsigned long           timeout;
  79         unsigned char           s_buf[READ_WRITE_BUFFER_SIZE];
  80         unsigned char           r_buf[READ_WRITE_BUFFER_SIZE];
  81         struct timer_list       poll_timer;
  82 };
  83
  84 static struct pcmcia_device *dev_table[CM_MAX_DEV];
  85
  86 #ifndef CM4040_DEBUG
  87 #define xoutb   outb
  88 #define xinb    inb
  89 #else
  90 static inline void xoutb(unsigned char val, unsigned short port)
  91 {
  92         pr_debug("outb(val=%.2x,port=%.4x)\n", val, port);
  93         outb(val, port);
  94 }
  95
  96 static inline unsigned char xinb(unsigned short port)
  97 {
  98         unsigned char val;
  99
 100         val = inb(port);
 101         pr_debug("%.2x=inb(%.4x)\n", val, port);
 102         return val;
 103 }
 104 #endif
 105
 106 /* poll the device fifo status register.  not to be confused with
 107  * the poll syscall. */
 108 static void cm4040_do_poll(unsigned long dummy)
 109 {
 110         struct reader_dev *dev = (struct reader_dev *) dummy;
 111         unsigned int obs = xinb(dev->p_dev->resource[0]->start
 112                                 + REG_OFFSET_BUFFER_STATUS);
 113
 114         if ((obs & BSR_BULK_IN_FULL)) {
 115                 set_bit(BS_READABLE, &dev->buffer_status);
 116                 DEBUGP(4, dev, "waking up read_wait\n");
 117                 wake_up_interruptible(&dev->read_wait);
 118         } else
 119                 clear_bit(BS_READABLE, &dev->buffer_status);
 120
 121         if (!(obs & BSR_BULK_OUT_FULL)) {
 122                 set_bit(BS_WRITABLE, &dev->buffer_status);
 123                 DEBUGP(4, dev, "waking up write_wait\n");
 124                 wake_up_interruptible(&dev->write_wait);
 125         } else
 126                 clear_bit(BS_WRITABLE, &dev->buffer_status);
 127
 128         if (dev->buffer_status)
 129                 wake_up_interruptible(&dev->poll_wait);
 130
 131         mod_timer(&dev->poll_timer, jiffies + POLL_PERIOD);
 132 }
 133
 134 static void cm4040_stop_poll(struct reader_dev *dev)
 135 {
 136         del_timer_sync(&dev->poll_timer);
 137 }
 138
 139 static int wait_for_bulk_out_ready(struct reader_dev *dev)
 140 {
 141         int i, rc;
 142         int iobase = dev->p_dev->resource[0]->start;
 143
 144         for (i = 0; i < POLL_LOOP_COUNT; i++) {
 145                 if ((xinb(iobase + REG_OFFSET_BUFFER_STATUS)
 146                     & BSR_BULK_OUT_FULL) == 0) {
 147                         DEBUGP(4, dev, "BulkOut empty (i=%d)\n", i);
 148                         return 1;
 149                 }
 150         }
 151
 152         DEBUGP(4, dev, "wait_event_interruptible_timeout(timeout=%ld\n",
 153                 dev->timeout);
 154         rc = wait_event_interruptible_timeout(dev->write_wait,
 155                                               test_and_clear_bit(BS_WRITABLE,
 156                                                        &dev->buffer_status),
 157                                               dev->timeout);
 158
 159         if (rc > 0)
 160                 DEBUGP(4, dev, "woke up: BulkOut empty\n");
 161         else if (rc == 0)
 162                 DEBUGP(4, dev, "woke up: BulkOut full, returning 0 :(\n");
 163         else if (rc < 0)
 164                 DEBUGP(4, dev, "woke up: signal arrived\n");
 165
 166         return rc;
 167 }
 168
 169 /* Write to Sync Control Register */
 170 static int write_sync_reg(unsigned char val, struct reader_dev *dev)
 171 {
 172         int iobase = dev->p_dev->resource[0]->start;
 173         int rc;
 174
 175         rc = wait_for_bulk_out_ready(dev);
 176         if (rc <= 0)
 177                 return rc;
 178
 179         xoutb(val, iobase + REG_OFFSET_SYNC_CONTROL);
 180         rc = wait_for_bulk_out_ready(dev);
 181         if (rc <= 0)
 182                 return rc;
 183
 184         return 1;
 185 }
 186
 187 static int wait_for_bulk_in_ready(struct reader_dev *dev)
 188 {
 189         int i, rc;
 190         int iobase = dev->p_dev->resource[0]->start;
 191
 192         for (i = 0; i < POLL_LOOP_COUNT; i++) {
 193                 if ((xinb(iobase + REG_OFFSET_BUFFER_STATUS)
 194                     & BSR_BULK_IN_FULL) == BSR_BULK_IN_FULL) {
 195                         DEBUGP(3, dev, "BulkIn full (i=%d)\n", i);
 196                         return 1;
 197                 }
 198         }
 199
 200         DEBUGP(4, dev, "wait_event_interruptible_timeout(timeout=%ld\n",
 201                 dev->timeout);
 202         rc = wait_event_interruptible_timeout(dev->read_wait,
 203                                               test_and_clear_bit(BS_READABLE,
 204                                                         &dev->buffer_status),
 205                                               dev->timeout);
 206         if (rc > 0)
 207                 DEBUGP(4, dev, "woke up: BulkIn full\n");
 208         else if (rc == 0)
 209                 DEBUGP(4, dev, "woke up: BulkIn not full, returning 0 :(\n");
 210         else if (rc < 0)
 211                 DEBUGP(4, dev, "woke up: signal arrived\n");
 212
 213         return rc;
 214 }
 215
 216 static ssize_t cm4040_read(struct file *filp, char __user *buf,
 217                         size_t count, loff_t *ppos)
 218 {
 219         struct reader_dev *dev = filp->private_data;
 220         int iobase = dev->p_dev->resource[0]->start;
 221         size_t bytes_to_read;
 222         unsigned long i;
 223         size_t min_bytes_to_read;
 224         int rc;
 225         unsigned char uc;
 226
 227         DEBUGP(2, dev, "-> cm4040_read(%s,%d)\n", current->comm, current->pid);
 228
 229         if (count == 0)
 230                 return 0;
 231
 232         if (count < 10)
 233                 return -EFAULT;
 234
 235         if (filp->f_flags & O_NONBLOCK) {
 236                 DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
 237                 DEBUGP(2, dev, "<- cm4040_read (failure)\n");
 238                 return -EAGAIN;
 239         }
 240
 241         if (!pcmcia_dev_present(dev->p_dev))
 242                 return -ENODEV;
 243
 244         for (i = 0; i < 5; i++) {
 245                 rc = wait_for_bulk_in_ready(dev);
 246                 if (rc <= 0) {
 247                         DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
 248                         DEBUGP(2, dev, "<- cm4040_read (failed)\n");
 249                         if (rc == -ERESTARTSYS)
 250                                 return rc;
 251                         return -EIO;
 252                 }
 253                 dev->r_buf[i] = xinb(iobase + REG_OFFSET_BULK_IN);
 254 #ifdef CM4040_DEBUG
 255                 pr_debug("%lu:%2x ", i, dev->r_buf[i]);
 256         }
 257         pr_debug("\n");
 258 #else
 259         }
 260 #endif
 261
 262         bytes_to_read = 5 + le32_to_cpu(*(__le32 *)&dev->r_buf[1]);
 263
 264         DEBUGP(6, dev, "BytesToRead=%zu\n", bytes_to_read);
 265
 266         min_bytes_to_read = min(count, bytes_to_read + 5);
 267         min_bytes_to_read = min_t(size_t, min_bytes_to_read, READ_WRITE_BUFFER_SIZE);
 268
 269         DEBUGP(6, dev, "Min=%zu\n", min_bytes_to_read);
 270
 271         for (i = 0; i < (min_bytes_to_read-5); i++) {
 272                 rc = wait_for_bulk_in_ready(dev);
 273                 if (rc <= 0) {
 274                         DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
 275                         DEBUGP(2, dev, "<- cm4040_read (failed)\n");
 276                         if (rc == -ERESTARTSYS)
 277                                 return rc;
 278                         return -EIO;
 279                 }
 280                 dev->r_buf[i+5] = xinb(iobase + REG_OFFSET_BULK_IN);
 281 #ifdef CM4040_DEBUG
 282                 pr_debug("%lu:%2x ", i, dev->r_buf[i]);
 283         }
 284         pr_debug("\n");
 285 #else
 286         }
 287 #endif
 288
 289         *ppos = min_bytes_to_read;
 290         if (copy_to_user(buf, dev->r_buf, min_bytes_to_read))
 291                 return -EFAULT;
 292
 293         rc = wait_for_bulk_in_ready(dev);
 294         if (rc <= 0) {
 295                 DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
 296                 DEBUGP(2, dev, "<- cm4040_read (failed)\n");
 297                 if (rc == -ERESTARTSYS)
 298                         return rc;
 299                 return -EIO;
 300         }
 301
 302         rc = write_sync_reg(SCR_READER_TO_HOST_DONE, dev);
 303         if (rc <= 0) {
 304                 DEBUGP(5, dev, "write_sync_reg c=%.2x\n", rc);
 305                 DEBUGP(2, dev, "<- cm4040_read (failed)\n");
 306                 if (rc == -ERESTARTSYS)
 307                         return rc;
 308                 else
 309                         return -EIO;
 310         }
 311
 312         uc = xinb(iobase + REG_OFFSET_BULK_IN);
 313
 314         DEBUGP(2, dev, "<- cm4040_read (successfully)\n");
 315         return min_bytes_to_read;
 316 }
 317
 318 static ssize_t cm4040_write(struct file *filp, const char __user *buf,
 319                          size_t count, loff_t *ppos)
 320 {
 321         struct reader_dev *dev = filp->private_data;
 322         int iobase = dev->p_dev->resource[0]->start;
 323         ssize_t rc;
 324         int i;
 325         unsigned int bytes_to_write;
 326
 327         DEBUGP(2, dev, "-> cm4040_write(%s,%d)\n", current->comm, current->pid);
 328
 329         if (count == 0) {
 330                 DEBUGP(2, dev, "<- cm4040_write empty read (successfully)\n");
 331                 return 0;
 332         }
 333
 334         if ((count < 5) || (count > READ_WRITE_BUFFER_SIZE)) {
 335                 DEBUGP(2, dev, "<- cm4040_write buffersize=%Zd < 5\n", count);
 336                 return -EIO;
 337         }
 338
 339         if (filp->f_flags & O_NONBLOCK) {
 340                 DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
 341                 DEBUGP(4, dev, "<- cm4040_write (failure)\n");
 342                 return -EAGAIN;
 343         }
 344
 345         if (!pcmcia_dev_present(dev->p_dev))
 346                 return -ENODEV;
 347
 348         bytes_to_write = count;
 349         if (copy_from_user(dev->s_buf, buf, bytes_to_write))
 350                 return -EFAULT;
 351
 352         switch (dev->s_buf[0]) {
 353                 case CMD_PC_TO_RDR_XFRBLOCK:
 354                 case CMD_PC_TO_RDR_SECURE:
 355                 case CMD_PC_TO_RDR_TEST_SECURE:
 356                 case CMD_PC_TO_RDR_OK_SECURE:
 357                         dev->timeout = CCID_DRIVER_BULK_DEFAULT_TIMEOUT;
 358                         break;
 359
 360                 case CMD_PC_TO_RDR_ICCPOWERON:
 361                         dev->timeout = CCID_DRIVER_ASYNC_POWERUP_TIMEOUT;
 362                         break;
 363
 364                 case CMD_PC_TO_RDR_GETSLOTSTATUS:
 365                 case CMD_PC_TO_RDR_ICCPOWEROFF:
 366                 case CMD_PC_TO_RDR_GETPARAMETERS:
 367                 case CMD_PC_TO_RDR_RESETPARAMETERS:
 368                 case CMD_PC_TO_RDR_SETPARAMETERS:
 369                 case CMD_PC_TO_RDR_ESCAPE:
 370                 case CMD_PC_TO_RDR_ICCCLOCK:
 371                 default:
 372                         dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
 373                         break;
 374         }
 375
 376         rc = write_sync_reg(SCR_HOST_TO_READER_START, dev);
 377         if (rc <= 0) {
 378                 DEBUGP(5, dev, "write_sync_reg c=%.2Zx\n", rc);
 379                 DEBUGP(2, dev, "<- cm4040_write (failed)\n");
 380                 if (rc == -ERESTARTSYS)
 381                         return rc;
 382                 else
 383                         return -EIO;
 384         }
 385
 386         DEBUGP(4, dev, "start \n");
 387
 388         for (i = 0; i < bytes_to_write; i++) {
 389                 rc = wait_for_bulk_out_ready(dev);
 390                 if (rc <= 0) {
 391                         DEBUGP(5, dev, "wait_for_bulk_out_ready rc=%.2Zx\n",
 392                                rc);
 393                         DEBUGP(2, dev, "<- cm4040_write (failed)\n");
 394                         if (rc == -ERESTARTSYS)
 395                                 return rc;
 396                         else
 397                                 return -EIO;
 398                 }
 399
 400                 xoutb(dev->s_buf[i],iobase + REG_OFFSET_BULK_OUT);
 401         }
 402         DEBUGP(4, dev, "end\n");
 403
 404         rc = write_sync_reg(SCR_HOST_TO_READER_DONE, dev);
 405
 406         if (rc <= 0) {
 407                 DEBUGP(5, dev, "write_sync_reg c=%.2Zx\n", rc);
 408                 DEBUGP(2, dev, "<- cm4040_write (failed)\n");
 409                 if (rc == -ERESTARTSYS)
 410                         return rc;
 411                 else
 412                         return -EIO;
 413         }
 414
 415         DEBUGP(2, dev, "<- cm4040_write (successfully)\n");
 416         return count;
 417 }
 418
 419 static unsigned int cm4040_poll(struct file *filp, poll_table *wait)
 420 {
 421         struct reader_dev *dev = filp->private_data;
 422         unsigned int mask = 0;
 423
 424         poll_wait(filp, &dev->poll_wait, wait);
 425
 426         if (test_and_clear_bit(BS_READABLE, &dev->buffer_status))
 427                 mask |= POLLIN | POLLRDNORM;
 428         if (test_and_clear_bit(BS_WRITABLE, &dev->buffer_status))
 429                 mask |= POLLOUT | POLLWRNORM;
 430
 431         DEBUGP(2, dev, "<- cm4040_poll(%u)\n", mask);
 432
 433         return mask;
 434 }
 435
 436 static int cm4040_open(struct inode *inode, struct file *filp)
 437 {
 438         struct reader_dev *dev;
 439         struct pcmcia_device *link;
 440         int minor = iminor(inode);
 441         int ret;
 442
 443         if (minor >= CM_MAX_DEV)
 444                 return -ENODEV;
 445
 446         lock_kernel();
 447         link = dev_table[minor];
 448         if (link == NULL || !pcmcia_dev_present(link)) {
 449                 ret = -ENODEV;
 450                 goto out;
 451         }
 452
 453         if (link->open) {
 454                 ret = -EBUSY;
 455                 goto out;
 456         }
 457
 458         dev = link->priv;
 459         filp->private_data = dev;
 460
 461         if (filp->f_flags & O_NONBLOCK) {
 462                 DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
 463                 ret = -EAGAIN;
 464                 goto out;
 465         }
 466
 467         link->open = 1;
 468
 469         dev->poll_timer.data = (unsigned long) dev;
 470         mod_timer(&dev->poll_timer, jiffies + POLL_PERIOD);
 471
 472         DEBUGP(2, dev, "<- cm4040_open (successfully)\n");
 473         ret = nonseekable_open(inode, filp);
 474 out:
 475         unlock_kernel();
 476         return ret;
 477 }
 478
 479 static int cm4040_close(struct inode *inode, struct file *filp)
 480 {
 481         struct reader_dev *dev = filp->private_data;
 482         struct pcmcia_device *link;
 483         int minor = iminor(inode);
 484
 485         DEBUGP(2, dev, "-> cm4040_close(maj/min=%d.%d)\n", imajor(inode),
 486               iminor(inode));
 487
 488         if (minor >= CM_MAX_DEV)
 489                 return -ENODEV;
 490
 491         link = dev_table[minor];
 492         if (link == NULL)
 493                 return -ENODEV;
 494
 495         cm4040_stop_poll(dev);
 496
 497         link->open = 0;
 498         wake_up(&dev->devq);
 499
 500         DEBUGP(2, dev, "<- cm4040_close\n");
 501         return 0;
 502 }
 503
 504 static void cm4040_reader_release(struct pcmcia_device *link)
 505 {
 506         struct reader_dev *dev = link->priv;
 507
 508         DEBUGP(3, dev, "-> cm4040_reader_release\n");
 509         while (link->open) {
 510                 DEBUGP(3, dev, KERN_INFO MODULE_NAME ": delaying release "
 511                        "until process has terminated\n");
 512                 wait_event(dev->devq, (link->open == 0));
 513         }
 514         DEBUGP(3, dev, "<- cm4040_reader_release\n");
 515         return;
 516 }
 517
 518 static int cm4040_config_check(struct pcmcia_device *p_dev,
 519                                cistpl_cftable_entry_t *cfg,
 520                                cistpl_cftable_entry_t *dflt,
 521                                unsigned int vcc,
 522                                void *priv_data)
 523 {
 524         int rc;
 525         if (!cfg->io.nwin)
 526                 return -ENODEV;
 527
 528         /* Get the IOaddr */
 529         p_dev->resource[0]->start = cfg->io.win[0].base;
 530         p_dev->resource[0]->end = cfg->io.win[0].len;
 531         p_dev->resource[0]->flags |= pcmcia_io_cfg_data_width(cfg->io.flags);
 532         p_dev->io_lines = cfg->io.flags & CISTPL_IO_LINES_MASK;
 533         rc = pcmcia_request_io(p_dev);
 534
 535         dev_printk(KERN_INFO, &p_dev->dev,
 536                    "pcmcia_request_io returned 0x%x\n", rc);
 537         return rc;
 538 }
 539
 540
 541 static int reader_config(struct pcmcia_device *link, int devno)
 542 {
 543         struct reader_dev *dev;
 544         int fail_rc;
 545
 546         if (pcmcia_loop_config(link, cm4040_config_check, NULL))
 547                 goto cs_release;
 548
 549         fail_rc = pcmcia_enable_device(link);
 550         if (fail_rc != 0) {
 551                 dev_printk(KERN_INFO, &link->dev,
 552                            "pcmcia_enable_device failed 0x%x\n",
 553                            fail_rc);
 554                 goto cs_release;
 555         }
 556
 557         dev = link->priv;
 558
 559         DEBUGP(2, dev, "device " DEVICE_NAME "%d at %pR\n", devno,
 560               link->resource[0]);
 561         DEBUGP(2, dev, "<- reader_config (succ)\n");
 562
 563         return 0;
 564
 565 cs_release:
 566         reader_release(link);
 567         return -ENODEV;
 568 }
 569
 570 static void reader_release(struct pcmcia_device *link)
 571 {
 572         cm4040_reader_release(link);
 573         pcmcia_disable_device(link);
 574 }
 575
 576 static int reader_probe(struct pcmcia_device *link)
 577 {
 578         struct reader_dev *dev;
 579         int i, ret;
 580
 581         for (i = 0; i < CM_MAX_DEV; i++) {
 582                 if (dev_table[i] == NULL)
 583                         break;
 584         }
 585
 586         if (i == CM_MAX_DEV)
 587                 return -ENODEV;
 588
 589         dev = kzalloc(sizeof(struct reader_dev), GFP_KERNEL);
 590         if (dev == NULL)
 591                 return -ENOMEM;
 592
 593         dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
 594         dev->buffer_status = 0;
 595
 596         link->priv = dev;
 597         dev->p_dev = link;
 598
 599         dev_table[i] = link;
 600
 601         init_waitqueue_head(&dev->devq);
 602         init_waitqueue_head(&dev->poll_wait);
 603         init_waitqueue_head(&dev->read_wait);
 604         init_waitqueue_head(&dev->write_wait);
 605         setup_timer(&dev->poll_timer, cm4040_do_poll, 0);
 606
 607         ret = reader_config(link, i);
 608         if (ret) {
 609                 dev_table[i] = NULL;
 610                 kfree(dev);
 611                 return ret;
 612         }
 613
 614         device_create(cmx_class, NULL, MKDEV(major, i), NULL, "cmx%d", i);
 615
 616         return 0;
 617 }
 618
 619 static void reader_detach(struct pcmcia_device *link)
 620 {
 621         struct reader_dev *dev = link->priv;
 622         int devno;
 623
 624         /* find device */
 625         for (devno = 0; devno < CM_MAX_DEV; devno++) {
 626                 if (dev_table[devno] == link)
 627                         break;
 628         }
 629         if (devno == CM_MAX_DEV)
 630                 return;
 631
 632         reader_release(link);
 633
 634         dev_table[devno] = NULL;
 635         kfree(dev);
 636
 637         device_destroy(cmx_class, MKDEV(major, devno));
 638
 639         return;
 640 }
 641
 642 static const struct file_operations reader_fops = {
 643         .owner          = THIS_MODULE,
 644         .read           = cm4040_read,
 645         .write          = cm4040_write,
 646         .open           = cm4040_open,
 647         .release        = cm4040_close,
 648         .poll           = cm4040_poll,
 649 };
 650
 651 static struct pcmcia_device_id cm4040_ids[] = {
 652         PCMCIA_DEVICE_MANF_CARD(0x0223, 0x0200),
 653         PCMCIA_DEVICE_PROD_ID12("OMNIKEY", "CardMan 4040",
 654                                 0xE32CDD8C, 0x8F23318B),
 655         PCMCIA_DEVICE_NULL,
 656 };
 657 MODULE_DEVICE_TABLE(pcmcia, cm4040_ids);
 658
 659 static struct pcmcia_driver reader_driver = {
 660         .owner          = THIS_MODULE,
 661         .drv            = {
 662                 .name   = "cm4040_cs",
 663         },
 664         .probe          = reader_probe,
 665         .remove         = reader_detach,
 666         .id_table       = cm4040_ids,
 667 };
 668
 669 static int __init cm4040_init(void)
 670 {
 671         int rc;
 672
 673         printk(KERN_INFO "%s\n", version);
 674         cmx_class = class_create(THIS_MODULE, "cardman_4040");
 675         if (IS_ERR(cmx_class))
 676                 return PTR_ERR(cmx_class);
 677
 678         major = register_chrdev(0, DEVICE_NAME, &reader_fops);
 679         if (major < 0) {
 680                 printk(KERN_WARNING MODULE_NAME
 681                         ": could not get major number\n");
 682                 class_destroy(cmx_class);
 683                 return major;
 684         }
 685
 686         rc = pcmcia_register_driver(&reader_driver);
 687         if (rc < 0) {
 688                 unregister_chrdev(major, DEVICE_NAME);
 689                 class_destroy(cmx_class);
 690                 return rc;
 691         }
 692
 693         return 0;
 694 }
 695
 696 static void __exit cm4040_exit(void)
 697 {
 698         printk(KERN_INFO MODULE_NAME ": unloading\n");
 699         pcmcia_unregister_driver(&reader_driver);
 700         unregister_chrdev(major, DEVICE_NAME);
 701         class_destroy(cmx_class);
 702 }
 703
 704 module_init(cm4040_init);
 705 module_exit(cm4040_exit);
 706 MODULE_LICENSE("Dual BSD/GPL");