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 /* #define PCMCIA_DEBUG 6 */
  21
  22 #include <linux/kernel.h>
  23 #include <linux/module.h>
  24 #include <linux/slab.h>
  25 #include <linux/init.h>
  26 #include <linux/fs.h>
  27 #include <linux/delay.h>
  28 #include <linux/poll.h>
  29 #include <linux/wait.h>
  30 #include <asm/uaccess.h>
  31 #include <asm/io.h>
  32
  33 #include <pcmcia/cs_types.h>
  34 #include <pcmcia/cs.h>
  35 #include <pcmcia/cistpl.h>
  36 #include <pcmcia/cisreg.h>
  37 #include <pcmcia/ciscode.h>
  38 #include <pcmcia/ds.h>
  39
  40 #include "cm4040_cs.h"
  41
  42
  43 #ifdef PCMCIA_DEBUG
  44 #define reader_to_dev(x)        (&handle_to_dev(x->p_dev->handle))
  45 static int pc_debug = PCMCIA_DEBUG;
  46 module_param(pc_debug, int, 0600);
  47 #define DEBUGP(n, rdr, x, args...) do {                                 \
  48         if (pc_debug >= (n))                                            \
  49                 dev_printk(KERN_DEBUG, reader_to_dev(rdr), "%s:" x,     \
  50                            __FUNCTION__ , ##args);                      \
  51         } while (0)
  52 #else
  53 #define DEBUGP(n, rdr, x, args...)
  54 #endif
  55
  56 static char *version =
  57 "OMNIKEY CardMan 4040 v1.1.0gm5 - All bugs added by Harald Welte";
  58
  59 #define CCID_DRIVER_BULK_DEFAULT_TIMEOUT        (150*HZ)
  60 #define CCID_DRIVER_ASYNC_POWERUP_TIMEOUT       (35*HZ)
  61 #define CCID_DRIVER_MINIMUM_TIMEOUT             (3*HZ)
  62 #define READ_WRITE_BUFFER_SIZE 512
  63 #define POLL_LOOP_COUNT                         1000
  64
  65 /* how often to poll for fifo status change */
  66 #define POLL_PERIOD                             msecs_to_jiffies(10)
  67
  68 static void reader_release(struct pcmcia_device *link);
  69
  70 static int major;
  71 static struct class *cmx_class;
  72
  73 #define         BS_READABLE     0x01
  74 #define         BS_WRITABLE     0x02
  75
  76 struct reader_dev {
  77         struct pcmcia_device    *p_dev;
  78         dev_node_t              node;
  79         wait_queue_head_t       devq;
  80         wait_queue_head_t       poll_wait;
  81         wait_queue_head_t       read_wait;
  82         wait_queue_head_t       write_wait;
  83         unsigned long           buffer_status;
  84         unsigned long           timeout;
  85         unsigned char           s_buf[READ_WRITE_BUFFER_SIZE];
  86         unsigned char           r_buf[READ_WRITE_BUFFER_SIZE];
  87         struct timer_list       poll_timer;
  88 };
  89
  90 static struct pcmcia_device *dev_table[CM_MAX_DEV];
  91
  92 #ifndef PCMCIA_DEBUG
  93 #define xoutb   outb
  94 #define xinb    inb
  95 #else
  96 static inline void xoutb(unsigned char val, unsigned short port)
  97 {
  98         if (pc_debug >= 7)
  99                 printk(KERN_DEBUG "outb(val=%.2x,port=%.4x)\n", val, port);
 100         outb(val, port);
 101 }
 102
 103 static inline unsigned char xinb(unsigned short port)
 104 {
 105         unsigned char val;
 106
 107         val = inb(port);
 108         if (pc_debug >= 7)
 109                 printk(KERN_DEBUG "%.2x=inb(%.4x)\n", val, port);
 110         return val;
 111 }
 112 #endif
 113
 114 /* poll the device fifo status register.  not to be confused with
 115  * the poll syscall. */
 116 static void cm4040_do_poll(unsigned long dummy)
 117 {
 118         struct reader_dev *dev = (struct reader_dev *) dummy;
 119         unsigned int obs = xinb(dev->p_dev->io.BasePort1
 120                                 + REG_OFFSET_BUFFER_STATUS);
 121
 122         if ((obs & BSR_BULK_IN_FULL)) {
 123                 set_bit(BS_READABLE, &dev->buffer_status);
 124                 DEBUGP(4, dev, "waking up read_wait\n");
 125                 wake_up_interruptible(&dev->read_wait);
 126         } else
 127                 clear_bit(BS_READABLE, &dev->buffer_status);
 128
 129         if (!(obs & BSR_BULK_OUT_FULL)) {
 130                 set_bit(BS_WRITABLE, &dev->buffer_status);
 131                 DEBUGP(4, dev, "waking up write_wait\n");
 132                 wake_up_interruptible(&dev->write_wait);
 133         } else
 134                 clear_bit(BS_WRITABLE, &dev->buffer_status);
 135
 136         if (dev->buffer_status)
 137                 wake_up_interruptible(&dev->poll_wait);
 138
 139         mod_timer(&dev->poll_timer, jiffies + POLL_PERIOD);
 140 }
 141
 142 static void cm4040_stop_poll(struct reader_dev *dev)
 143 {
 144         del_timer_sync(&dev->poll_timer);
 145 }
 146
 147 static int wait_for_bulk_out_ready(struct reader_dev *dev)
 148 {
 149         int i, rc;
 150         int iobase = dev->p_dev->io.BasePort1;
 151
 152         for (i = 0; i < POLL_LOOP_COUNT; i++) {
 153                 if ((xinb(iobase + REG_OFFSET_BUFFER_STATUS)
 154                     & BSR_BULK_OUT_FULL) == 0) {
 155                         DEBUGP(4, dev, "BulkOut empty (i=%d)\n", i);
 156                         return 1;
 157                 }
 158         }
 159
 160         DEBUGP(4, dev, "wait_event_interruptible_timeout(timeout=%ld\n",
 161                 dev->timeout);
 162         rc = wait_event_interruptible_timeout(dev->write_wait,
 163                                               test_and_clear_bit(BS_WRITABLE,
 164                                                        &dev->buffer_status),
 165                                               dev->timeout);
 166
 167         if (rc > 0)
 168                 DEBUGP(4, dev, "woke up: BulkOut empty\n");
 169         else if (rc == 0)
 170                 DEBUGP(4, dev, "woke up: BulkOut full, returning 0 :(\n");
 171         else if (rc < 0)
 172                 DEBUGP(4, dev, "woke up: signal arrived\n");
 173
 174         return rc;
 175 }
 176
 177 /* Write to Sync Control Register */
 178 static int write_sync_reg(unsigned char val, struct reader_dev *dev)
 179 {
 180         int iobase = dev->p_dev->io.BasePort1;
 181         int rc;
 182
 183         rc = wait_for_bulk_out_ready(dev);
 184         if (rc <= 0)
 185                 return rc;
 186
 187         xoutb(val, iobase + REG_OFFSET_SYNC_CONTROL);
 188         rc = wait_for_bulk_out_ready(dev);
 189         if (rc <= 0)
 190                 return rc;
 191
 192         return 1;
 193 }
 194
 195 static int wait_for_bulk_in_ready(struct reader_dev *dev)
 196 {
 197         int i, rc;
 198         int iobase = dev->p_dev->io.BasePort1;
 199
 200         for (i = 0; i < POLL_LOOP_COUNT; i++) {
 201                 if ((xinb(iobase + REG_OFFSET_BUFFER_STATUS)
 202                     & BSR_BULK_IN_FULL) == BSR_BULK_IN_FULL) {
 203                         DEBUGP(3, dev, "BulkIn full (i=%d)\n", i);
 204                         return 1;
 205                 }
 206         }
 207
 208         DEBUGP(4, dev, "wait_event_interruptible_timeout(timeout=%ld\n",
 209                 dev->timeout);
 210         rc = wait_event_interruptible_timeout(dev->read_wait,
 211                                               test_and_clear_bit(BS_READABLE,
 212                                                         &dev->buffer_status),
 213                                               dev->timeout);
 214         if (rc > 0)
 215                 DEBUGP(4, dev, "woke up: BulkIn full\n");
 216         else if (rc == 0)
 217                 DEBUGP(4, dev, "woke up: BulkIn not full, returning 0 :(\n");
 218         else if (rc < 0)
 219                 DEBUGP(4, dev, "woke up: signal arrived\n");
 220
 221         return rc;
 222 }
 223
 224 static ssize_t cm4040_read(struct file *filp, char __user *buf,
 225                         size_t count, loff_t *ppos)
 226 {
 227         struct reader_dev *dev = filp->private_data;
 228         int iobase = dev->p_dev->io.BasePort1;
 229         size_t bytes_to_read;
 230         unsigned long i;
 231         size_t min_bytes_to_read;
 232         int rc;
 233         unsigned char uc;
 234
 235         DEBUGP(2, dev, "-> cm4040_read(%s,%d)\n", current->comm, current->pid);
 236
 237         if (count == 0)
 238                 return 0;
 239
 240         if (count < 10)
 241                 return -EFAULT;
 242
 243         if (filp->f_flags & O_NONBLOCK) {
 244                 DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
 245                 DEBUGP(2, dev, "<- cm4040_read (failure)\n");
 246                 return -EAGAIN;
 247         }
 248
 249         if (!pcmcia_dev_present(dev->p_dev))
 250                 return -ENODEV;
 251
 252         for (i = 0; i < 5; i++) {
 253                 rc = wait_for_bulk_in_ready(dev);
 254                 if (rc <= 0) {
 255                         DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
 256                         DEBUGP(2, dev, "<- cm4040_read (failed)\n");
 257                         if (rc == -ERESTARTSYS)
 258                                 return rc;
 259                         return -EIO;
 260                 }
 261                 dev->r_buf[i] = xinb(iobase + REG_OFFSET_BULK_IN);
 262 #ifdef PCMCIA_DEBUG
 263                 if (pc_debug >= 6)
 264                         printk(KERN_DEBUG "%lu:%2x ", i, dev->r_buf[i]);
 265         }
 266         printk("\n");
 267 #else
 268         }
 269 #endif
 270
 271         bytes_to_read = 5 + le32_to_cpu(*(__le32 *)&dev->r_buf[1]);
 272
 273         DEBUGP(6, dev, "BytesToRead=%lu\n", bytes_to_read);
 274
 275         min_bytes_to_read = min(count, bytes_to_read + 5);
 276
 277         DEBUGP(6, dev, "Min=%lu\n", min_bytes_to_read);
 278
 279         for (i = 0; i < (min_bytes_to_read-5); i++) {
 280                 rc = wait_for_bulk_in_ready(dev);
 281                 if (rc <= 0) {
 282                         DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
 283                         DEBUGP(2, dev, "<- cm4040_read (failed)\n");
 284                         if (rc == -ERESTARTSYS)
 285                                 return rc;
 286                         return -EIO;
 287                 }
 288                 dev->r_buf[i+5] = xinb(iobase + REG_OFFSET_BULK_IN);
 289 #ifdef PCMCIA_DEBUG
 290                 if (pc_debug >= 6)
 291                         printk(KERN_DEBUG "%lu:%2x ", i, dev->r_buf[i]);
 292         }
 293         printk("\n");
 294 #else
 295         }
 296 #endif
 297
 298         *ppos = min_bytes_to_read;
 299         if (copy_to_user(buf, dev->r_buf, min_bytes_to_read))
 300                 return -EFAULT;
 301
 302         rc = wait_for_bulk_in_ready(dev);
 303         if (rc <= 0) {
 304                 DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
 305                 DEBUGP(2, dev, "<- cm4040_read (failed)\n");
 306                 if (rc == -ERESTARTSYS)
 307                         return rc;
 308                 return -EIO;
 309         }
 310
 311         rc = write_sync_reg(SCR_READER_TO_HOST_DONE, dev);
 312         if (rc <= 0) {
 313                 DEBUGP(5, dev, "write_sync_reg c=%.2x\n", rc);
 314                 DEBUGP(2, dev, "<- cm4040_read (failed)\n");
 315                 if (rc == -ERESTARTSYS)
 316                         return rc;
 317                 else
 318                         return -EIO;
 319         }
 320
 321         uc = xinb(iobase + REG_OFFSET_BULK_IN);
 322
 323         DEBUGP(2, dev, "<- cm4040_read (successfully)\n");
 324         return min_bytes_to_read;
 325 }
 326
 327 static ssize_t cm4040_write(struct file *filp, const char __user *buf,
 328                          size_t count, loff_t *ppos)
 329 {
 330         struct reader_dev *dev = filp->private_data;
 331         int iobase = dev->p_dev->io.BasePort1;
 332         ssize_t rc;
 333         int i;
 334         unsigned int bytes_to_write;
 335
 336         DEBUGP(2, dev, "-> cm4040_write(%s,%d)\n", current->comm, current->pid);
 337
 338         if (count == 0) {
 339                 DEBUGP(2, dev, "<- cm4040_write empty read (successfully)\n");
 340                 return 0;
 341         }
 342
 343         if (count < 5) {
 344                 DEBUGP(2, dev, "<- cm4040_write buffersize=%Zd < 5\n", count);
 345                 return -EIO;
 346         }
 347
 348         if (filp->f_flags & O_NONBLOCK) {
 349                 DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
 350                 DEBUGP(4, dev, "<- cm4040_write (failure)\n");
 351                 return -EAGAIN;
 352         }
 353
 354         if (!pcmcia_dev_present(dev->p_dev))
 355                 return -ENODEV;
 356
 357         bytes_to_write = count;
 358         if (copy_from_user(dev->s_buf, buf, bytes_to_write))
 359                 return -EFAULT;
 360
 361         switch (dev->s_buf[0]) {
 362                 case CMD_PC_TO_RDR_XFRBLOCK:
 363                 case CMD_PC_TO_RDR_SECURE:
 364                 case CMD_PC_TO_RDR_TEST_SECURE:
 365                 case CMD_PC_TO_RDR_OK_SECURE:
 366                         dev->timeout = CCID_DRIVER_BULK_DEFAULT_TIMEOUT;
 367                         break;
 368
 369                 case CMD_PC_TO_RDR_ICCPOWERON:
 370                         dev->timeout = CCID_DRIVER_ASYNC_POWERUP_TIMEOUT;
 371                         break;
 372
 373                 case CMD_PC_TO_RDR_GETSLOTSTATUS:
 374                 case CMD_PC_TO_RDR_ICCPOWEROFF:
 375                 case CMD_PC_TO_RDR_GETPARAMETERS:
 376                 case CMD_PC_TO_RDR_RESETPARAMETERS:
 377                 case CMD_PC_TO_RDR_SETPARAMETERS:
 378                 case CMD_PC_TO_RDR_ESCAPE:
 379                 case CMD_PC_TO_RDR_ICCCLOCK:
 380                 default:
 381                         dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
 382                         break;
 383         }
 384
 385         rc = write_sync_reg(SCR_HOST_TO_READER_START, dev);
 386         if (rc <= 0) {
 387                 DEBUGP(5, dev, "write_sync_reg c=%.2Zx\n", rc);
 388                 DEBUGP(2, dev, "<- cm4040_write (failed)\n");
 389                 if (rc == -ERESTARTSYS)
 390                         return rc;
 391                 else
 392                         return -EIO;
 393         }
 394
 395         DEBUGP(4, dev, "start \n");
 396
 397         for (i = 0; i < bytes_to_write; i++) {
 398                 rc = wait_for_bulk_out_ready(dev);
 399                 if (rc <= 0) {
 400                         DEBUGP(5, dev, "wait_for_bulk_out_ready rc=%.2Zx\n",
 401                                rc);
 402                         DEBUGP(2, dev, "<- cm4040_write (failed)\n");
 403                         if (rc == -ERESTARTSYS)
 404                                 return rc;
 405                         else
 406                                 return -EIO;
 407                 }
 408
 409                 xoutb(dev->s_buf[i],iobase + REG_OFFSET_BULK_OUT);
 410         }
 411         DEBUGP(4, dev, "end\n");
 412
 413         rc = write_sync_reg(SCR_HOST_TO_READER_DONE, dev);
 414
 415         if (rc <= 0) {
 416                 DEBUGP(5, dev, "write_sync_reg c=%.2Zx\n", rc);
 417                 DEBUGP(2, dev, "<- cm4040_write (failed)\n");
 418                 if (rc == -ERESTARTSYS)
 419                         return rc;
 420                 else
 421                         return -EIO;
 422         }
 423
 424         DEBUGP(2, dev, "<- cm4040_write (successfully)\n");
 425         return count;
 426 }
 427
 428 static unsigned int cm4040_poll(struct file *filp, poll_table *wait)
 429 {
 430         struct reader_dev *dev = filp->private_data;
 431         unsigned int mask = 0;
 432
 433         poll_wait(filp, &dev->poll_wait, wait);
 434
 435         if (test_and_clear_bit(BS_READABLE, &dev->buffer_status))
 436                 mask |= POLLIN | POLLRDNORM;
 437         if (test_and_clear_bit(BS_WRITABLE, &dev->buffer_status))
 438                 mask |= POLLOUT | POLLWRNORM;
 439
 440         DEBUGP(2, dev, "<- cm4040_poll(%u)\n", mask);
 441
 442         return mask;
 443 }
 444
 445 static int cm4040_open(struct inode *inode, struct file *filp)
 446 {
 447         struct reader_dev *dev;
 448         struct pcmcia_device *link;
 449         int minor = iminor(inode);
 450
 451         if (minor >= CM_MAX_DEV)
 452                 return -ENODEV;
 453
 454         link = dev_table[minor];
 455         if (link == NULL || !pcmcia_dev_present(link))
 456                 return -ENODEV;
 457
 458         if (link->open)
 459                 return -EBUSY;
 460
 461         dev = link->priv;
 462         filp->private_data = dev;
 463
 464         if (filp->f_flags & O_NONBLOCK) {
 465                 DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
 466                 return -EAGAIN;
 467         }
 468
 469         link->open = 1;
 470
 471         dev->poll_timer.data = (unsigned long) dev;
 472         mod_timer(&dev->poll_timer, jiffies + POLL_PERIOD);
 473
 474         DEBUGP(2, dev, "<- cm4040_open (successfully)\n");
 475         return nonseekable_open(inode, filp);
 476 }
 477
 478 static int cm4040_close(struct inode *inode, struct file *filp)
 479 {
 480         struct reader_dev *dev = filp->private_data;
 481         struct pcmcia_device *link;
 482         int minor = iminor(inode);
 483
 484         DEBUGP(2, dev, "-> cm4040_close(maj/min=%d.%d)\n", imajor(inode),
 485               iminor(inode));
 486
 487         if (minor >= CM_MAX_DEV)
 488                 return -ENODEV;
 489
 490         link = dev_table[minor];
 491         if (link == NULL)
 492                 return -ENODEV;
 493
 494         cm4040_stop_poll(dev);
 495
 496         link->open = 0;
 497         wake_up(&dev->devq);
 498
 499         DEBUGP(2, dev, "<- cm4040_close\n");
 500         return 0;
 501 }
 502
 503 static void cm4040_reader_release(struct pcmcia_device *link)
 504 {
 505         struct reader_dev *dev = link->priv;
 506
 507         DEBUGP(3, dev, "-> cm4040_reader_release\n");
 508         while (link->open) {
 509                 DEBUGP(3, dev, KERN_INFO MODULE_NAME ": delaying release "
 510                        "until process has terminated\n");
 511                 wait_event(dev->devq, (link->open == 0));
 512         }
 513         DEBUGP(3, dev, "<- cm4040_reader_release\n");
 514         return;
 515 }
 516
 517 static int reader_config(struct pcmcia_device *link, int devno)
 518 {
 519         struct reader_dev *dev;
 520         tuple_t tuple;
 521         cisparse_t parse;
 522         u_char buf[64];
 523         int fail_fn, fail_rc;
 524         int rc;
 525
 526         tuple.Attributes = 0;
 527         tuple.TupleData = buf;
 528         tuple.TupleDataMax = sizeof(buf);
 529         tuple.TupleOffset = 0;
 530
 531         link->io.BasePort2 = 0;
 532         link->io.NumPorts2 = 0;
 533         link->io.Attributes2 = 0;
 534         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 535         for (rc = pcmcia_get_first_tuple(link, &tuple);
 536              rc == CS_SUCCESS;
 537              rc = pcmcia_get_next_tuple(link, &tuple)) {
 538                 rc = pcmcia_get_tuple_data(link, &tuple);
 539                 if (rc != CS_SUCCESS)
 540                         continue;
 541                 rc = pcmcia_parse_tuple(link, &tuple, &parse);
 542                 if (rc != CS_SUCCESS)
 543                         continue;
 544
 545                 link->conf.ConfigIndex = parse.cftable_entry.index;
 546
 547                 if (!parse.cftable_entry.io.nwin)
 548                         continue;
 549
 550                 link->io.BasePort1 = parse.cftable_entry.io.win[0].base;
 551                 link->io.NumPorts1 = parse.cftable_entry.io.win[0].len;
 552                 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
 553                 if (!(parse.cftable_entry.io.flags & CISTPL_IO_8BIT))
 554                         link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
 555                 if (!(parse.cftable_entry.io.flags & CISTPL_IO_16BIT))
 556                         link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 557                 link->io.IOAddrLines = parse.cftable_entry.io.flags
 558                                                 & CISTPL_IO_LINES_MASK;
 559                 rc = pcmcia_request_io(link, &link->io);
 560
 561                 dev_printk(KERN_INFO, &handle_to_dev(link), "foo");
 562                 if (rc == CS_SUCCESS)
 563                         break;
 564                 else
 565                         dev_printk(KERN_INFO, &handle_to_dev(link),
 566                                    "pcmcia_request_io failed 0x%x\n", rc);
 567         }
 568         if (rc != CS_SUCCESS)
 569                 goto cs_release;
 570
 571         link->conf.IntType = 00000002;
 572
 573         if ((fail_rc = pcmcia_request_configuration(link,&link->conf))
 574                                                                 !=CS_SUCCESS) {
 575                 fail_fn = RequestConfiguration;
 576                 dev_printk(KERN_INFO, &handle_to_dev(link),
 577                            "pcmcia_request_configuration failed 0x%x\n",
 578                            fail_rc);
 579                 goto cs_release;
 580         }
 581
 582         dev = link->priv;
 583         sprintf(dev->node.dev_name, DEVICE_NAME "%d", devno);
 584         dev->node.major = major;
 585         dev->node.minor = devno;
 586         dev->node.next = &dev->node;
 587
 588         DEBUGP(2, dev, "device " DEVICE_NAME "%d at 0x%.4x-0x%.4x\n", devno,
 589               link->io.BasePort1, link->io.BasePort1+link->io.NumPorts1);
 590         DEBUGP(2, dev, "<- reader_config (succ)\n");
 591
 592         return 0;
 593
 594 cs_release:
 595         reader_release(link);
 596         return -ENODEV;
 597 }
 598
 599 static void reader_release(struct pcmcia_device *link)
 600 {
 601         cm4040_reader_release(link->priv);
 602         pcmcia_disable_device(link);
 603 }
 604
 605 static int reader_probe(struct pcmcia_device *link)
 606 {
 607         struct reader_dev *dev;
 608         int i, ret;
 609
 610         for (i = 0; i < CM_MAX_DEV; i++) {
 611                 if (dev_table[i] == NULL)
 612                         break;
 613         }
 614
 615         if (i == CM_MAX_DEV)
 616                 return -ENODEV;
 617
 618         dev = kzalloc(sizeof(struct reader_dev), GFP_KERNEL);
 619         if (dev == NULL)
 620                 return -ENOMEM;
 621
 622         dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
 623         dev->buffer_status = 0;
 624
 625         link->priv = dev;
 626         dev->p_dev = link;
 627
 628         link->conf.IntType = INT_MEMORY_AND_IO;
 629         dev_table[i] = link;
 630
 631         init_waitqueue_head(&dev->devq);
 632         init_waitqueue_head(&dev->poll_wait);
 633         init_waitqueue_head(&dev->read_wait);
 634         init_waitqueue_head(&dev->write_wait);
 635         setup_timer(&dev->poll_timer, cm4040_do_poll, 0);
 636
 637         ret = reader_config(link, i);
 638         if (ret)
 639                 return ret;
 640
 641         class_device_create(cmx_class, NULL, MKDEV(major, i), NULL,
 642                             "cmx%d", i);
 643
 644         return 0;
 645 }
 646
 647 static void reader_detach(struct pcmcia_device *link)
 648 {
 649         struct reader_dev *dev = link->priv;
 650         int devno;
 651
 652         /* find device */
 653         for (devno = 0; devno < CM_MAX_DEV; devno++) {
 654                 if (dev_table[devno] == link)
 655                         break;
 656         }
 657         if (devno == CM_MAX_DEV)
 658                 return;
 659
 660         reader_release(link);
 661
 662         dev_table[devno] = NULL;
 663         kfree(dev);
 664
 665         class_device_destroy(cmx_class, MKDEV(major, devno));
 666
 667         return;
 668 }
 669
 670 static const struct file_operations reader_fops = {
 671         .owner          = THIS_MODULE,
 672         .read           = cm4040_read,
 673         .write          = cm4040_write,
 674         .open           = cm4040_open,
 675         .release        = cm4040_close,
 676         .poll           = cm4040_poll,
 677 };
 678
 679 static struct pcmcia_device_id cm4040_ids[] = {
 680         PCMCIA_DEVICE_MANF_CARD(0x0223, 0x0200),
 681         PCMCIA_DEVICE_PROD_ID12("OMNIKEY", "CardMan 4040",
 682                                 0xE32CDD8C, 0x8F23318B),
 683         PCMCIA_DEVICE_NULL,
 684 };
 685 MODULE_DEVICE_TABLE(pcmcia, cm4040_ids);
 686
 687 static struct pcmcia_driver reader_driver = {
 688         .owner          = THIS_MODULE,
 689         .drv            = {
 690                 .name   = "cm4040_cs",
 691         },
 692         .probe          = reader_probe,
 693         .remove         = reader_detach,
 694         .id_table       = cm4040_ids,
 695 };
 696
 697 static int __init cm4040_init(void)
 698 {
 699         int rc;
 700
 701         printk(KERN_INFO "%s\n", version);
 702         cmx_class = class_create(THIS_MODULE, "cardman_4040");
 703         if (IS_ERR(cmx_class))
 704                 return PTR_ERR(cmx_class);
 705
 706         major = register_chrdev(0, DEVICE_NAME, &reader_fops);
 707         if (major < 0) {
 708                 printk(KERN_WARNING MODULE_NAME
 709                         ": could not get major number\n");
 710                 return major;
 711         }
 712
 713         rc = pcmcia_register_driver(&reader_driver);
 714         if (rc < 0) {
 715                 unregister_chrdev(major, DEVICE_NAME);
 716                 return rc;
 717         }
 718
 719         return 0;
 720 }
 721
 722 static void __exit cm4040_exit(void)
 723 {
 724         printk(KERN_INFO MODULE_NAME ": unloading\n");
 725         pcmcia_unregister_driver(&reader_driver);
 726         unregister_chrdev(major, DEVICE_NAME);
 727         class_destroy(cmx_class);
 728 }
 729
 730 module_init(cm4040_init);
 731 module_exit(cm4040_exit);
 732 MODULE_LICENSE("Dual BSD/GPL");