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         min_bytes_to_read = min_t(size_t, min_bytes_to_read, READ_WRITE_BUFFER_SIZE);
 277
 278         DEBUGP(6, dev, "Min=%lu\n", min_bytes_to_read);
 279
 280         for (i = 0; i < (min_bytes_to_read-5); i++) {
 281                 rc = wait_for_bulk_in_ready(dev);
 282                 if (rc <= 0) {
 283                         DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
 284                         DEBUGP(2, dev, "<- cm4040_read (failed)\n");
 285                         if (rc == -ERESTARTSYS)
 286                                 return rc;
 287                         return -EIO;
 288                 }
 289                 dev->r_buf[i+5] = xinb(iobase + REG_OFFSET_BULK_IN);
 290 #ifdef PCMCIA_DEBUG
 291                 if (pc_debug >= 6)
 292                         printk(KERN_DEBUG "%lu:%2x ", i, dev->r_buf[i]);
 293         }
 294         printk("\n");
 295 #else
 296         }
 297 #endif
 298
 299         *ppos = min_bytes_to_read;
 300         if (copy_to_user(buf, dev->r_buf, min_bytes_to_read))
 301                 return -EFAULT;
 302
 303         rc = wait_for_bulk_in_ready(dev);
 304         if (rc <= 0) {
 305                 DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
 306                 DEBUGP(2, dev, "<- cm4040_read (failed)\n");
 307                 if (rc == -ERESTARTSYS)
 308                         return rc;
 309                 return -EIO;
 310         }
 311
 312         rc = write_sync_reg(SCR_READER_TO_HOST_DONE, dev);
 313         if (rc <= 0) {
 314                 DEBUGP(5, dev, "write_sync_reg c=%.2x\n", rc);
 315                 DEBUGP(2, dev, "<- cm4040_read (failed)\n");
 316                 if (rc == -ERESTARTSYS)
 317                         return rc;
 318                 else
 319                         return -EIO;
 320         }
 321
 322         uc = xinb(iobase + REG_OFFSET_BULK_IN);
 323
 324         DEBUGP(2, dev, "<- cm4040_read (successfully)\n");
 325         return min_bytes_to_read;
 326 }
 327
 328 static ssize_t cm4040_write(struct file *filp, const char __user *buf,
 329                          size_t count, loff_t *ppos)
 330 {
 331         struct reader_dev *dev = filp->private_data;
 332         int iobase = dev->p_dev->io.BasePort1;
 333         ssize_t rc;
 334         int i;
 335         unsigned int bytes_to_write;
 336
 337         DEBUGP(2, dev, "-> cm4040_write(%s,%d)\n", current->comm, current->pid);
 338
 339         if (count == 0) {
 340                 DEBUGP(2, dev, "<- cm4040_write empty read (successfully)\n");
 341                 return 0;
 342         }
 343
 344         if ((count < 5) || (count > READ_WRITE_BUFFER_SIZE)) {
 345                 DEBUGP(2, dev, "<- cm4040_write buffersize=%Zd < 5\n", count);
 346                 return -EIO;
 347         }
 348
 349         if (filp->f_flags & O_NONBLOCK) {
 350                 DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
 351                 DEBUGP(4, dev, "<- cm4040_write (failure)\n");
 352                 return -EAGAIN;
 353         }
 354
 355         if (!pcmcia_dev_present(dev->p_dev))
 356                 return -ENODEV;
 357
 358         bytes_to_write = count;
 359         if (copy_from_user(dev->s_buf, buf, bytes_to_write))
 360                 return -EFAULT;
 361
 362         switch (dev->s_buf[0]) {
 363                 case CMD_PC_TO_RDR_XFRBLOCK:
 364                 case CMD_PC_TO_RDR_SECURE:
 365                 case CMD_PC_TO_RDR_TEST_SECURE:
 366                 case CMD_PC_TO_RDR_OK_SECURE:
 367                         dev->timeout = CCID_DRIVER_BULK_DEFAULT_TIMEOUT;
 368                         break;
 369
 370                 case CMD_PC_TO_RDR_ICCPOWERON:
 371                         dev->timeout = CCID_DRIVER_ASYNC_POWERUP_TIMEOUT;
 372                         break;
 373
 374                 case CMD_PC_TO_RDR_GETSLOTSTATUS:
 375                 case CMD_PC_TO_RDR_ICCPOWEROFF:
 376                 case CMD_PC_TO_RDR_GETPARAMETERS:
 377                 case CMD_PC_TO_RDR_RESETPARAMETERS:
 378                 case CMD_PC_TO_RDR_SETPARAMETERS:
 379                 case CMD_PC_TO_RDR_ESCAPE:
 380                 case CMD_PC_TO_RDR_ICCCLOCK:
 381                 default:
 382                         dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
 383                         break;
 384         }
 385
 386         rc = write_sync_reg(SCR_HOST_TO_READER_START, dev);
 387         if (rc <= 0) {
 388                 DEBUGP(5, dev, "write_sync_reg c=%.2Zx\n", rc);
 389                 DEBUGP(2, dev, "<- cm4040_write (failed)\n");
 390                 if (rc == -ERESTARTSYS)
 391                         return rc;
 392                 else
 393                         return -EIO;
 394         }
 395
 396         DEBUGP(4, dev, "start \n");
 397
 398         for (i = 0; i < bytes_to_write; i++) {
 399                 rc = wait_for_bulk_out_ready(dev);
 400                 if (rc <= 0) {
 401                         DEBUGP(5, dev, "wait_for_bulk_out_ready rc=%.2Zx\n",
 402                                rc);
 403                         DEBUGP(2, dev, "<- cm4040_write (failed)\n");
 404                         if (rc == -ERESTARTSYS)
 405                                 return rc;
 406                         else
 407                                 return -EIO;
 408                 }
 409
 410                 xoutb(dev->s_buf[i],iobase + REG_OFFSET_BULK_OUT);
 411         }
 412         DEBUGP(4, dev, "end\n");
 413
 414         rc = write_sync_reg(SCR_HOST_TO_READER_DONE, dev);
 415
 416         if (rc <= 0) {
 417                 DEBUGP(5, dev, "write_sync_reg c=%.2Zx\n", rc);
 418                 DEBUGP(2, dev, "<- cm4040_write (failed)\n");
 419                 if (rc == -ERESTARTSYS)
 420                         return rc;
 421                 else
 422                         return -EIO;
 423         }
 424
 425         DEBUGP(2, dev, "<- cm4040_write (successfully)\n");
 426         return count;
 427 }
 428
 429 static unsigned int cm4040_poll(struct file *filp, poll_table *wait)
 430 {
 431         struct reader_dev *dev = filp->private_data;
 432         unsigned int mask = 0;
 433
 434         poll_wait(filp, &dev->poll_wait, wait);
 435
 436         if (test_and_clear_bit(BS_READABLE, &dev->buffer_status))
 437                 mask |= POLLIN | POLLRDNORM;
 438         if (test_and_clear_bit(BS_WRITABLE, &dev->buffer_status))
 439                 mask |= POLLOUT | POLLWRNORM;
 440
 441         DEBUGP(2, dev, "<- cm4040_poll(%u)\n", mask);
 442
 443         return mask;
 444 }
 445
 446 static int cm4040_open(struct inode *inode, struct file *filp)
 447 {
 448         struct reader_dev *dev;
 449         struct pcmcia_device *link;
 450         int minor = iminor(inode);
 451
 452         if (minor >= CM_MAX_DEV)
 453                 return -ENODEV;
 454
 455         link = dev_table[minor];
 456         if (link == NULL || !pcmcia_dev_present(link))
 457                 return -ENODEV;
 458
 459         if (link->open)
 460                 return -EBUSY;
 461
 462         dev = link->priv;
 463         filp->private_data = dev;
 464
 465         if (filp->f_flags & O_NONBLOCK) {
 466                 DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
 467                 return -EAGAIN;
 468         }
 469
 470         link->open = 1;
 471
 472         dev->poll_timer.data = (unsigned long) dev;
 473         mod_timer(&dev->poll_timer, jiffies + POLL_PERIOD);
 474
 475         DEBUGP(2, dev, "<- cm4040_open (successfully)\n");
 476         return nonseekable_open(inode, filp);
 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 reader_config(struct pcmcia_device *link, int devno)
 519 {
 520         struct reader_dev *dev;
 521         tuple_t tuple;
 522         cisparse_t parse;
 523         u_char buf[64];
 524         int fail_fn, fail_rc;
 525         int rc;
 526
 527         tuple.Attributes = 0;
 528         tuple.TupleData = buf;
 529         tuple.TupleDataMax = sizeof(buf);
 530         tuple.TupleOffset = 0;
 531
 532         link->io.BasePort2 = 0;
 533         link->io.NumPorts2 = 0;
 534         link->io.Attributes2 = 0;
 535         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 536         for (rc = pcmcia_get_first_tuple(link, &tuple);
 537              rc == CS_SUCCESS;
 538              rc = pcmcia_get_next_tuple(link, &tuple)) {
 539                 rc = pcmcia_get_tuple_data(link, &tuple);
 540                 if (rc != CS_SUCCESS)
 541                         continue;
 542                 rc = pcmcia_parse_tuple(link, &tuple, &parse);
 543                 if (rc != CS_SUCCESS)
 544                         continue;
 545
 546                 link->conf.ConfigIndex = parse.cftable_entry.index;
 547
 548                 if (!parse.cftable_entry.io.nwin)
 549                         continue;
 550
 551                 link->io.BasePort1 = parse.cftable_entry.io.win[0].base;
 552                 link->io.NumPorts1 = parse.cftable_entry.io.win[0].len;
 553                 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
 554                 if (!(parse.cftable_entry.io.flags & CISTPL_IO_8BIT))
 555                         link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
 556                 if (!(parse.cftable_entry.io.flags & CISTPL_IO_16BIT))
 557                         link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 558                 link->io.IOAddrLines = parse.cftable_entry.io.flags
 559                                                 & CISTPL_IO_LINES_MASK;
 560                 rc = pcmcia_request_io(link, &link->io);
 561
 562                 dev_printk(KERN_INFO, &handle_to_dev(link), "foo");
 563                 if (rc == CS_SUCCESS)
 564                         break;
 565                 else
 566                         dev_printk(KERN_INFO, &handle_to_dev(link),
 567                                    "pcmcia_request_io failed 0x%x\n", rc);
 568         }
 569         if (rc != CS_SUCCESS)
 570                 goto cs_release;
 571
 572         link->conf.IntType = 00000002;
 573
 574         if ((fail_rc = pcmcia_request_configuration(link,&link->conf))
 575                                                                 !=CS_SUCCESS) {
 576                 fail_fn = RequestConfiguration;
 577                 dev_printk(KERN_INFO, &handle_to_dev(link),
 578                            "pcmcia_request_configuration failed 0x%x\n",
 579                            fail_rc);
 580                 goto cs_release;
 581         }
 582
 583         dev = link->priv;
 584         sprintf(dev->node.dev_name, DEVICE_NAME "%d", devno);
 585         dev->node.major = major;
 586         dev->node.minor = devno;
 587         dev->node.next = &dev->node;
 588
 589         DEBUGP(2, dev, "device " DEVICE_NAME "%d at 0x%.4x-0x%.4x\n", devno,
 590               link->io.BasePort1, link->io.BasePort1+link->io.NumPorts1);
 591         DEBUGP(2, dev, "<- reader_config (succ)\n");
 592
 593         return 0;
 594
 595 cs_release:
 596         reader_release(link);
 597         return -ENODEV;
 598 }
 599
 600 static void reader_release(struct pcmcia_device *link)
 601 {
 602         cm4040_reader_release(link->priv);
 603         pcmcia_disable_device(link);
 604 }
 605
 606 static int reader_probe(struct pcmcia_device *link)
 607 {
 608         struct reader_dev *dev;
 609         int i, ret;
 610
 611         for (i = 0; i < CM_MAX_DEV; i++) {
 612                 if (dev_table[i] == NULL)
 613                         break;
 614         }
 615
 616         if (i == CM_MAX_DEV)
 617                 return -ENODEV;
 618
 619         dev = kzalloc(sizeof(struct reader_dev), GFP_KERNEL);
 620         if (dev == NULL)
 621                 return -ENOMEM;
 622
 623         dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
 624         dev->buffer_status = 0;
 625
 626         link->priv = dev;
 627         dev->p_dev = link;
 628
 629         link->conf.IntType = INT_MEMORY_AND_IO;
 630         dev_table[i] = link;
 631
 632         init_waitqueue_head(&dev->devq);
 633         init_waitqueue_head(&dev->poll_wait);
 634         init_waitqueue_head(&dev->read_wait);
 635         init_waitqueue_head(&dev->write_wait);
 636         setup_timer(&dev->poll_timer, cm4040_do_poll, 0);
 637
 638         ret = reader_config(link, i);
 639         if (ret)
 640                 return ret;
 641
 642         class_device_create(cmx_class, NULL, MKDEV(major, i), NULL,
 643                             "cmx%d", i);
 644
 645         return 0;
 646 }
 647
 648 static void reader_detach(struct pcmcia_device *link)
 649 {
 650         struct reader_dev *dev = link->priv;
 651         int devno;
 652
 653         /* find device */
 654         for (devno = 0; devno < CM_MAX_DEV; devno++) {
 655                 if (dev_table[devno] == link)
 656                         break;
 657         }
 658         if (devno == CM_MAX_DEV)
 659                 return;
 660
 661         reader_release(link);
 662
 663         dev_table[devno] = NULL;
 664         kfree(dev);
 665
 666         class_device_destroy(cmx_class, MKDEV(major, devno));
 667
 668         return;
 669 }
 670
 671 static const struct file_operations reader_fops = {
 672         .owner          = THIS_MODULE,
 673         .read           = cm4040_read,
 674         .write          = cm4040_write,
 675         .open           = cm4040_open,
 676         .release        = cm4040_close,
 677         .poll           = cm4040_poll,
 678 };
 679
 680 static struct pcmcia_device_id cm4040_ids[] = {
 681         PCMCIA_DEVICE_MANF_CARD(0x0223, 0x0200),
 682         PCMCIA_DEVICE_PROD_ID12("OMNIKEY", "CardMan 4040",
 683                                 0xE32CDD8C, 0x8F23318B),
 684         PCMCIA_DEVICE_NULL,
 685 };
 686 MODULE_DEVICE_TABLE(pcmcia, cm4040_ids);
 687
 688 static struct pcmcia_driver reader_driver = {
 689         .owner          = THIS_MODULE,
 690         .drv            = {
 691                 .name   = "cm4040_cs",
 692         },
 693         .probe          = reader_probe,
 694         .remove         = reader_detach,
 695         .id_table       = cm4040_ids,
 696 };
 697
 698 static int __init cm4040_init(void)
 699 {
 700         int rc;
 701
 702         printk(KERN_INFO "%s\n", version);
 703         cmx_class = class_create(THIS_MODULE, "cardman_4040");
 704         if (IS_ERR(cmx_class))
 705                 return PTR_ERR(cmx_class);
 706
 707         major = register_chrdev(0, DEVICE_NAME, &reader_fops);
 708         if (major < 0) {
 709                 printk(KERN_WARNING MODULE_NAME
 710                         ": could not get major number\n");
 711                 return major;
 712         }
 713
 714         rc = pcmcia_register_driver(&reader_driver);
 715         if (rc < 0) {
 716                 unregister_chrdev(major, DEVICE_NAME);
 717                 return rc;
 718         }
 719
 720         return 0;
 721 }
 722
 723 static void __exit cm4040_exit(void)
 724 {
 725         printk(KERN_INFO MODULE_NAME ": unloading\n");
 726         pcmcia_unregister_driver(&reader_driver);
 727         unregister_chrdev(major, DEVICE_NAME);
 728         class_destroy(cmx_class);
 729 }
 730
 731 module_init(cm4040_init);
 732 module_exit(cm4040_exit);
 733 MODULE_LICENSE("Dual BSD/GPL");