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/smp_lock.h>
  30 #include <linux/wait.h>
  31 #include <asm/uaccess.h>
  32 #include <asm/io.h>
  33
  34 #include <pcmcia/cs_types.h>
  35 #include <pcmcia/cs.h>
  36 #include <pcmcia/cistpl.h>
  37 #include <pcmcia/cisreg.h>
  38 #include <pcmcia/ciscode.h>
  39 #include <pcmcia/ds.h>
  40
  41 #include "cm4040_cs.h"
  42
  43
  44 #ifdef PCMCIA_DEBUG
  45 #define reader_to_dev(x)        (&handle_to_dev(x->p_dev))
  46 static int pc_debug = PCMCIA_DEBUG;
  47 module_param(pc_debug, int, 0600);
  48 #define DEBUGP(n, rdr, x, args...) do {                                 \
  49         if (pc_debug >= (n))                                            \
  50                 dev_printk(KERN_DEBUG, reader_to_dev(rdr), "%s:" x,     \
  51                            __func__ , ##args);                  \
  52         } while (0)
  53 #else
  54 #define DEBUGP(n, rdr, x, args...)
  55 #endif
  56
  57 static char *version =
  58 "OMNIKEY CardMan 4040 v1.1.0gm5 - All bugs added by Harald Welte";
  59
  60 #define CCID_DRIVER_BULK_DEFAULT_TIMEOUT        (150*HZ)
  61 #define CCID_DRIVER_ASYNC_POWERUP_TIMEOUT       (35*HZ)
  62 #define CCID_DRIVER_MINIMUM_TIMEOUT             (3*HZ)
  63 #define READ_WRITE_BUFFER_SIZE 512
  64 #define POLL_LOOP_COUNT                         1000
  65
  66 /* how often to poll for fifo status change */
  67 #define POLL_PERIOD                             msecs_to_jiffies(10)
  68
  69 static void reader_release(struct pcmcia_device *link);
  70
  71 static int major;
  72 static struct class *cmx_class;
  73
  74 #define         BS_READABLE     0x01
  75 #define         BS_WRITABLE     0x02
  76
  77 struct reader_dev {
  78         struct pcmcia_device    *p_dev;
  79         dev_node_t              node;
  80         wait_queue_head_t       devq;
  81         wait_queue_head_t       poll_wait;
  82         wait_queue_head_t       read_wait;
  83         wait_queue_head_t       write_wait;
  84         unsigned long           buffer_status;
  85         unsigned long           timeout;
  86         unsigned char           s_buf[READ_WRITE_BUFFER_SIZE];
  87         unsigned char           r_buf[READ_WRITE_BUFFER_SIZE];
  88         struct timer_list       poll_timer;
  89 };
  90
  91 static struct pcmcia_device *dev_table[CM_MAX_DEV];
  92
  93 #ifndef PCMCIA_DEBUG
  94 #define xoutb   outb
  95 #define xinb    inb
  96 #else
  97 static inline void xoutb(unsigned char val, unsigned short port)
  98 {
  99         if (pc_debug >= 7)
 100                 printk(KERN_DEBUG "outb(val=%.2x,port=%.4x)\n", val, port);
 101         outb(val, port);
 102 }
 103
 104 static inline unsigned char xinb(unsigned short port)
 105 {
 106         unsigned char val;
 107
 108         val = inb(port);
 109         if (pc_debug >= 7)
 110                 printk(KERN_DEBUG "%.2x=inb(%.4x)\n", val, port);
 111         return val;
 112 }
 113 #endif
 114
 115 /* poll the device fifo status register.  not to be confused with
 116  * the poll syscall. */
 117 static void cm4040_do_poll(unsigned long dummy)
 118 {
 119         struct reader_dev *dev = (struct reader_dev *) dummy;
 120         unsigned int obs = xinb(dev->p_dev->io.BasePort1
 121                                 + REG_OFFSET_BUFFER_STATUS);
 122
 123         if ((obs & BSR_BULK_IN_FULL)) {
 124                 set_bit(BS_READABLE, &dev->buffer_status);
 125                 DEBUGP(4, dev, "waking up read_wait\n");
 126                 wake_up_interruptible(&dev->read_wait);
 127         } else
 128                 clear_bit(BS_READABLE, &dev->buffer_status);
 129
 130         if (!(obs & BSR_BULK_OUT_FULL)) {
 131                 set_bit(BS_WRITABLE, &dev->buffer_status);
 132                 DEBUGP(4, dev, "waking up write_wait\n");
 133                 wake_up_interruptible(&dev->write_wait);
 134         } else
 135                 clear_bit(BS_WRITABLE, &dev->buffer_status);
 136
 137         if (dev->buffer_status)
 138                 wake_up_interruptible(&dev->poll_wait);
 139
 140         mod_timer(&dev->poll_timer, jiffies + POLL_PERIOD);
 141 }
 142
 143 static void cm4040_stop_poll(struct reader_dev *dev)
 144 {
 145         del_timer_sync(&dev->poll_timer);
 146 }
 147
 148 static int wait_for_bulk_out_ready(struct reader_dev *dev)
 149 {
 150         int i, rc;
 151         int iobase = dev->p_dev->io.BasePort1;
 152
 153         for (i = 0; i < POLL_LOOP_COUNT; i++) {
 154                 if ((xinb(iobase + REG_OFFSET_BUFFER_STATUS)
 155                     & BSR_BULK_OUT_FULL) == 0) {
 156                         DEBUGP(4, dev, "BulkOut empty (i=%d)\n", i);
 157                         return 1;
 158                 }
 159         }
 160
 161         DEBUGP(4, dev, "wait_event_interruptible_timeout(timeout=%ld\n",
 162                 dev->timeout);
 163         rc = wait_event_interruptible_timeout(dev->write_wait,
 164                                               test_and_clear_bit(BS_WRITABLE,
 165                                                        &dev->buffer_status),
 166                                               dev->timeout);
 167
 168         if (rc > 0)
 169                 DEBUGP(4, dev, "woke up: BulkOut empty\n");
 170         else if (rc == 0)
 171                 DEBUGP(4, dev, "woke up: BulkOut full, returning 0 :(\n");
 172         else if (rc < 0)
 173                 DEBUGP(4, dev, "woke up: signal arrived\n");
 174
 175         return rc;
 176 }
 177
 178 /* Write to Sync Control Register */
 179 static int write_sync_reg(unsigned char val, struct reader_dev *dev)
 180 {
 181         int iobase = dev->p_dev->io.BasePort1;
 182         int rc;
 183
 184         rc = wait_for_bulk_out_ready(dev);
 185         if (rc <= 0)
 186                 return rc;
 187
 188         xoutb(val, iobase + REG_OFFSET_SYNC_CONTROL);
 189         rc = wait_for_bulk_out_ready(dev);
 190         if (rc <= 0)
 191                 return rc;
 192
 193         return 1;
 194 }
 195
 196 static int wait_for_bulk_in_ready(struct reader_dev *dev)
 197 {
 198         int i, rc;
 199         int iobase = dev->p_dev->io.BasePort1;
 200
 201         for (i = 0; i < POLL_LOOP_COUNT; i++) {
 202                 if ((xinb(iobase + REG_OFFSET_BUFFER_STATUS)
 203                     & BSR_BULK_IN_FULL) == BSR_BULK_IN_FULL) {
 204                         DEBUGP(3, dev, "BulkIn full (i=%d)\n", i);
 205                         return 1;
 206                 }
 207         }
 208
 209         DEBUGP(4, dev, "wait_event_interruptible_timeout(timeout=%ld\n",
 210                 dev->timeout);
 211         rc = wait_event_interruptible_timeout(dev->read_wait,
 212                                               test_and_clear_bit(BS_READABLE,
 213                                                         &dev->buffer_status),
 214                                               dev->timeout);
 215         if (rc > 0)
 216                 DEBUGP(4, dev, "woke up: BulkIn full\n");
 217         else if (rc == 0)
 218                 DEBUGP(4, dev, "woke up: BulkIn not full, returning 0 :(\n");
 219         else if (rc < 0)
 220                 DEBUGP(4, dev, "woke up: signal arrived\n");
 221
 222         return rc;
 223 }
 224
 225 static ssize_t cm4040_read(struct file *filp, char __user *buf,
 226                         size_t count, loff_t *ppos)
 227 {
 228         struct reader_dev *dev = filp->private_data;
 229         int iobase = dev->p_dev->io.BasePort1;
 230         size_t bytes_to_read;
 231         unsigned long i;
 232         size_t min_bytes_to_read;
 233         int rc;
 234         unsigned char uc;
 235
 236         DEBUGP(2, dev, "-> cm4040_read(%s,%d)\n", current->comm, current->pid);
 237
 238         if (count == 0)
 239                 return 0;
 240
 241         if (count < 10)
 242                 return -EFAULT;
 243
 244         if (filp->f_flags & O_NONBLOCK) {
 245                 DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
 246                 DEBUGP(2, dev, "<- cm4040_read (failure)\n");
 247                 return -EAGAIN;
 248         }
 249
 250         if (!pcmcia_dev_present(dev->p_dev))
 251                 return -ENODEV;
 252
 253         for (i = 0; i < 5; i++) {
 254                 rc = wait_for_bulk_in_ready(dev);
 255                 if (rc <= 0) {
 256                         DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
 257                         DEBUGP(2, dev, "<- cm4040_read (failed)\n");
 258                         if (rc == -ERESTARTSYS)
 259                                 return rc;
 260                         return -EIO;
 261                 }
 262                 dev->r_buf[i] = xinb(iobase + REG_OFFSET_BULK_IN);
 263 #ifdef PCMCIA_DEBUG
 264                 if (pc_debug >= 6)
 265                         printk(KERN_DEBUG "%lu:%2x ", i, dev->r_buf[i]);
 266         }
 267         printk("\n");
 268 #else
 269         }
 270 #endif
 271
 272         bytes_to_read = 5 + le32_to_cpu(*(__le32 *)&dev->r_buf[1]);
 273
 274         DEBUGP(6, dev, "BytesToRead=%lu\n", bytes_to_read);
 275
 276         min_bytes_to_read = min(count, bytes_to_read + 5);
 277         min_bytes_to_read = min_t(size_t, min_bytes_to_read, READ_WRITE_BUFFER_SIZE);
 278
 279         DEBUGP(6, dev, "Min=%lu\n", min_bytes_to_read);
 280
 281         for (i = 0; i < (min_bytes_to_read-5); i++) {
 282                 rc = wait_for_bulk_in_ready(dev);
 283                 if (rc <= 0) {
 284                         DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
 285                         DEBUGP(2, dev, "<- cm4040_read (failed)\n");
 286                         if (rc == -ERESTARTSYS)
 287                                 return rc;
 288                         return -EIO;
 289                 }
 290                 dev->r_buf[i+5] = xinb(iobase + REG_OFFSET_BULK_IN);
 291 #ifdef PCMCIA_DEBUG
 292                 if (pc_debug >= 6)
 293                         printk(KERN_DEBUG "%lu:%2x ", i, dev->r_buf[i]);
 294         }
 295         printk("\n");
 296 #else
 297         }
 298 #endif
 299
 300         *ppos = min_bytes_to_read;
 301         if (copy_to_user(buf, dev->r_buf, min_bytes_to_read))
 302                 return -EFAULT;
 303
 304         rc = wait_for_bulk_in_ready(dev);
 305         if (rc <= 0) {
 306                 DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
 307                 DEBUGP(2, dev, "<- cm4040_read (failed)\n");
 308                 if (rc == -ERESTARTSYS)
 309                         return rc;
 310                 return -EIO;
 311         }
 312
 313         rc = write_sync_reg(SCR_READER_TO_HOST_DONE, dev);
 314         if (rc <= 0) {
 315                 DEBUGP(5, dev, "write_sync_reg c=%.2x\n", rc);
 316                 DEBUGP(2, dev, "<- cm4040_read (failed)\n");
 317                 if (rc == -ERESTARTSYS)
 318                         return rc;
 319                 else
 320                         return -EIO;
 321         }
 322
 323         uc = xinb(iobase + REG_OFFSET_BULK_IN);
 324
 325         DEBUGP(2, dev, "<- cm4040_read (successfully)\n");
 326         return min_bytes_to_read;
 327 }
 328
 329 static ssize_t cm4040_write(struct file *filp, const char __user *buf,
 330                          size_t count, loff_t *ppos)
 331 {
 332         struct reader_dev *dev = filp->private_data;
 333         int iobase = dev->p_dev->io.BasePort1;
 334         ssize_t rc;
 335         int i;
 336         unsigned int bytes_to_write;
 337
 338         DEBUGP(2, dev, "-> cm4040_write(%s,%d)\n", current->comm, current->pid);
 339
 340         if (count == 0) {
 341                 DEBUGP(2, dev, "<- cm4040_write empty read (successfully)\n");
 342                 return 0;
 343         }
 344
 345         if ((count < 5) || (count > READ_WRITE_BUFFER_SIZE)) {
 346                 DEBUGP(2, dev, "<- cm4040_write buffersize=%Zd < 5\n", count);
 347                 return -EIO;
 348         }
 349
 350         if (filp->f_flags & O_NONBLOCK) {
 351                 DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
 352                 DEBUGP(4, dev, "<- cm4040_write (failure)\n");
 353                 return -EAGAIN;
 354         }
 355
 356         if (!pcmcia_dev_present(dev->p_dev))
 357                 return -ENODEV;
 358
 359         bytes_to_write = count;
 360         if (copy_from_user(dev->s_buf, buf, bytes_to_write))
 361                 return -EFAULT;
 362
 363         switch (dev->s_buf[0]) {
 364                 case CMD_PC_TO_RDR_XFRBLOCK:
 365                 case CMD_PC_TO_RDR_SECURE:
 366                 case CMD_PC_TO_RDR_TEST_SECURE:
 367                 case CMD_PC_TO_RDR_OK_SECURE:
 368                         dev->timeout = CCID_DRIVER_BULK_DEFAULT_TIMEOUT;
 369                         break;
 370
 371                 case CMD_PC_TO_RDR_ICCPOWERON:
 372                         dev->timeout = CCID_DRIVER_ASYNC_POWERUP_TIMEOUT;
 373                         break;
 374
 375                 case CMD_PC_TO_RDR_GETSLOTSTATUS:
 376                 case CMD_PC_TO_RDR_ICCPOWEROFF:
 377                 case CMD_PC_TO_RDR_GETPARAMETERS:
 378                 case CMD_PC_TO_RDR_RESETPARAMETERS:
 379                 case CMD_PC_TO_RDR_SETPARAMETERS:
 380                 case CMD_PC_TO_RDR_ESCAPE:
 381                 case CMD_PC_TO_RDR_ICCCLOCK:
 382                 default:
 383                         dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
 384                         break;
 385         }
 386
 387         rc = write_sync_reg(SCR_HOST_TO_READER_START, dev);
 388         if (rc <= 0) {
 389                 DEBUGP(5, dev, "write_sync_reg c=%.2Zx\n", rc);
 390                 DEBUGP(2, dev, "<- cm4040_write (failed)\n");
 391                 if (rc == -ERESTARTSYS)
 392                         return rc;
 393                 else
 394                         return -EIO;
 395         }
 396
 397         DEBUGP(4, dev, "start \n");
 398
 399         for (i = 0; i < bytes_to_write; i++) {
 400                 rc = wait_for_bulk_out_ready(dev);
 401                 if (rc <= 0) {
 402                         DEBUGP(5, dev, "wait_for_bulk_out_ready rc=%.2Zx\n",
 403                                rc);
 404                         DEBUGP(2, dev, "<- cm4040_write (failed)\n");
 405                         if (rc == -ERESTARTSYS)
 406                                 return rc;
 407                         else
 408                                 return -EIO;
 409                 }
 410
 411                 xoutb(dev->s_buf[i],iobase + REG_OFFSET_BULK_OUT);
 412         }
 413         DEBUGP(4, dev, "end\n");
 414
 415         rc = write_sync_reg(SCR_HOST_TO_READER_DONE, dev);
 416
 417         if (rc <= 0) {
 418                 DEBUGP(5, dev, "write_sync_reg c=%.2Zx\n", rc);
 419                 DEBUGP(2, dev, "<- cm4040_write (failed)\n");
 420                 if (rc == -ERESTARTSYS)
 421                         return rc;
 422                 else
 423                         return -EIO;
 424         }
 425
 426         DEBUGP(2, dev, "<- cm4040_write (successfully)\n");
 427         return count;
 428 }
 429
 430 static unsigned int cm4040_poll(struct file *filp, poll_table *wait)
 431 {
 432         struct reader_dev *dev = filp->private_data;
 433         unsigned int mask = 0;
 434
 435         poll_wait(filp, &dev->poll_wait, wait);
 436
 437         if (test_and_clear_bit(BS_READABLE, &dev->buffer_status))
 438                 mask |= POLLIN | POLLRDNORM;
 439         if (test_and_clear_bit(BS_WRITABLE, &dev->buffer_status))
 440                 mask |= POLLOUT | POLLWRNORM;
 441
 442         DEBUGP(2, dev, "<- cm4040_poll(%u)\n", mask);
 443
 444         return mask;
 445 }
 446
 447 static int cm4040_open(struct inode *inode, struct file *filp)
 448 {
 449         struct reader_dev *dev;
 450         struct pcmcia_device *link;
 451         int minor = iminor(inode);
 452         int ret;
 453
 454         if (minor >= CM_MAX_DEV)
 455                 return -ENODEV;
 456
 457         lock_kernel();
 458         link = dev_table[minor];
 459         if (link == NULL || !pcmcia_dev_present(link)) {
 460                 ret = -ENODEV;
 461                 goto out;
 462         }
 463
 464         if (link->open) {
 465                 ret = -EBUSY;
 466                 goto out;
 467         }
 468
 469         dev = link->priv;
 470         filp->private_data = dev;
 471
 472         if (filp->f_flags & O_NONBLOCK) {
 473                 DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
 474                 ret = -EAGAIN;
 475                 goto out;
 476         }
 477
 478         link->open = 1;
 479
 480         dev->poll_timer.data = (unsigned long) dev;
 481         mod_timer(&dev->poll_timer, jiffies + POLL_PERIOD);
 482
 483         DEBUGP(2, dev, "<- cm4040_open (successfully)\n");
 484         ret = nonseekable_open(inode, filp);
 485 out:
 486         unlock_kernel();
 487         return ret;
 488 }
 489
 490 static int cm4040_close(struct inode *inode, struct file *filp)
 491 {
 492         struct reader_dev *dev = filp->private_data;
 493         struct pcmcia_device *link;
 494         int minor = iminor(inode);
 495
 496         DEBUGP(2, dev, "-> cm4040_close(maj/min=%d.%d)\n", imajor(inode),
 497               iminor(inode));
 498
 499         if (minor >= CM_MAX_DEV)
 500                 return -ENODEV;
 501
 502         link = dev_table[minor];
 503         if (link == NULL)
 504                 return -ENODEV;
 505
 506         cm4040_stop_poll(dev);
 507
 508         link->open = 0;
 509         wake_up(&dev->devq);
 510
 511         DEBUGP(2, dev, "<- cm4040_close\n");
 512         return 0;
 513 }
 514
 515 static void cm4040_reader_release(struct pcmcia_device *link)
 516 {
 517         struct reader_dev *dev = link->priv;
 518
 519         DEBUGP(3, dev, "-> cm4040_reader_release\n");
 520         while (link->open) {
 521                 DEBUGP(3, dev, KERN_INFO MODULE_NAME ": delaying release "
 522                        "until process has terminated\n");
 523                 wait_event(dev->devq, (link->open == 0));
 524         }
 525         DEBUGP(3, dev, "<- cm4040_reader_release\n");
 526         return;
 527 }
 528
 529 static int reader_config(struct pcmcia_device *link, int devno)
 530 {
 531         struct reader_dev *dev;
 532         tuple_t tuple;
 533         cisparse_t parse;
 534         u_char buf[64];
 535         int fail_fn, fail_rc;
 536         int rc;
 537
 538         tuple.Attributes = 0;
 539         tuple.TupleData = buf;
 540         tuple.TupleDataMax = sizeof(buf);
 541         tuple.TupleOffset = 0;
 542
 543         link->io.BasePort2 = 0;
 544         link->io.NumPorts2 = 0;
 545         link->io.Attributes2 = 0;
 546         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 547         for (rc = pcmcia_get_first_tuple(link, &tuple);
 548              rc == CS_SUCCESS;
 549              rc = pcmcia_get_next_tuple(link, &tuple)) {
 550                 rc = pcmcia_get_tuple_data(link, &tuple);
 551                 if (rc != CS_SUCCESS)
 552                         continue;
 553                 rc = pcmcia_parse_tuple(link, &tuple, &parse);
 554                 if (rc != CS_SUCCESS)
 555                         continue;
 556
 557                 link->conf.ConfigIndex = parse.cftable_entry.index;
 558
 559                 if (!parse.cftable_entry.io.nwin)
 560                         continue;
 561
 562                 link->io.BasePort1 = parse.cftable_entry.io.win[0].base;
 563                 link->io.NumPorts1 = parse.cftable_entry.io.win[0].len;
 564                 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
 565                 if (!(parse.cftable_entry.io.flags & CISTPL_IO_8BIT))
 566                         link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
 567                 if (!(parse.cftable_entry.io.flags & CISTPL_IO_16BIT))
 568                         link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 569                 link->io.IOAddrLines = parse.cftable_entry.io.flags
 570                                                 & CISTPL_IO_LINES_MASK;
 571                 rc = pcmcia_request_io(link, &link->io);
 572
 573                 dev_printk(KERN_INFO, &handle_to_dev(link), "foo");
 574                 if (rc == CS_SUCCESS)
 575                         break;
 576                 else
 577                         dev_printk(KERN_INFO, &handle_to_dev(link),
 578                                    "pcmcia_request_io failed 0x%x\n", rc);
 579         }
 580         if (rc != CS_SUCCESS)
 581                 goto cs_release;
 582
 583         link->conf.IntType = 00000002;
 584
 585         if ((fail_rc = pcmcia_request_configuration(link,&link->conf))
 586                                                                 !=CS_SUCCESS) {
 587                 fail_fn = RequestConfiguration;
 588                 dev_printk(KERN_INFO, &handle_to_dev(link),
 589                            "pcmcia_request_configuration failed 0x%x\n",
 590                            fail_rc);
 591                 goto cs_release;
 592         }
 593
 594         dev = link->priv;
 595         sprintf(dev->node.dev_name, DEVICE_NAME "%d", devno);
 596         dev->node.major = major;
 597         dev->node.minor = devno;
 598         dev->node.next = &dev->node;
 599
 600         DEBUGP(2, dev, "device " DEVICE_NAME "%d at 0x%.4x-0x%.4x\n", devno,
 601               link->io.BasePort1, link->io.BasePort1+link->io.NumPorts1);
 602         DEBUGP(2, dev, "<- reader_config (succ)\n");
 603
 604         return 0;
 605
 606 cs_release:
 607         reader_release(link);
 608         return -ENODEV;
 609 }
 610
 611 static void reader_release(struct pcmcia_device *link)
 612 {
 613         cm4040_reader_release(link);
 614         pcmcia_disable_device(link);
 615 }
 616
 617 static int reader_probe(struct pcmcia_device *link)
 618 {
 619         struct reader_dev *dev;
 620         int i, ret;
 621
 622         for (i = 0; i < CM_MAX_DEV; i++) {
 623                 if (dev_table[i] == NULL)
 624                         break;
 625         }
 626
 627         if (i == CM_MAX_DEV)
 628                 return -ENODEV;
 629
 630         dev = kzalloc(sizeof(struct reader_dev), GFP_KERNEL);
 631         if (dev == NULL)
 632                 return -ENOMEM;
 633
 634         dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
 635         dev->buffer_status = 0;
 636
 637         link->priv = dev;
 638         dev->p_dev = link;
 639
 640         link->conf.IntType = INT_MEMORY_AND_IO;
 641         dev_table[i] = link;
 642
 643         init_waitqueue_head(&dev->devq);
 644         init_waitqueue_head(&dev->poll_wait);
 645         init_waitqueue_head(&dev->read_wait);
 646         init_waitqueue_head(&dev->write_wait);
 647         setup_timer(&dev->poll_timer, cm4040_do_poll, 0);
 648
 649         ret = reader_config(link, i);
 650         if (ret) {
 651                 dev_table[i] = NULL;
 652                 kfree(dev);
 653                 return ret;
 654         }
 655
 656         device_create_drvdata(cmx_class, NULL, MKDEV(major, i), NULL,
 657                               "cmx%d", i);
 658
 659         return 0;
 660 }
 661
 662 static void reader_detach(struct pcmcia_device *link)
 663 {
 664         struct reader_dev *dev = link->priv;
 665         int devno;
 666
 667         /* find device */
 668         for (devno = 0; devno < CM_MAX_DEV; devno++) {
 669                 if (dev_table[devno] == link)
 670                         break;
 671         }
 672         if (devno == CM_MAX_DEV)
 673                 return;
 674
 675         reader_release(link);
 676
 677         dev_table[devno] = NULL;
 678         kfree(dev);
 679
 680         device_destroy(cmx_class, MKDEV(major, devno));
 681
 682         return;
 683 }
 684
 685 static const struct file_operations reader_fops = {
 686         .owner          = THIS_MODULE,
 687         .read           = cm4040_read,
 688         .write          = cm4040_write,
 689         .open           = cm4040_open,
 690         .release        = cm4040_close,
 691         .poll           = cm4040_poll,
 692 };
 693
 694 static struct pcmcia_device_id cm4040_ids[] = {
 695         PCMCIA_DEVICE_MANF_CARD(0x0223, 0x0200),
 696         PCMCIA_DEVICE_PROD_ID12("OMNIKEY", "CardMan 4040",
 697                                 0xE32CDD8C, 0x8F23318B),
 698         PCMCIA_DEVICE_NULL,
 699 };
 700 MODULE_DEVICE_TABLE(pcmcia, cm4040_ids);
 701
 702 static struct pcmcia_driver reader_driver = {
 703         .owner          = THIS_MODULE,
 704         .drv            = {
 705                 .name   = "cm4040_cs",
 706         },
 707         .probe          = reader_probe,
 708         .remove         = reader_detach,
 709         .id_table       = cm4040_ids,
 710 };
 711
 712 static int __init cm4040_init(void)
 713 {
 714         int rc;
 715
 716         printk(KERN_INFO "%s\n", version);
 717         cmx_class = class_create(THIS_MODULE, "cardman_4040");
 718         if (IS_ERR(cmx_class))
 719                 return PTR_ERR(cmx_class);
 720
 721         major = register_chrdev(0, DEVICE_NAME, &reader_fops);
 722         if (major < 0) {
 723                 printk(KERN_WARNING MODULE_NAME
 724                         ": could not get major number\n");
 725                 class_destroy(cmx_class);
 726                 return major;
 727         }
 728
 729         rc = pcmcia_register_driver(&reader_driver);
 730         if (rc < 0) {
 731                 unregister_chrdev(major, DEVICE_NAME);
 732                 class_destroy(cmx_class);
 733                 return rc;
 734         }
 735
 736         return 0;
 737 }
 738
 739 static void __exit cm4040_exit(void)
 740 {
 741         printk(KERN_INFO MODULE_NAME ": unloading\n");
 742         pcmcia_unregister_driver(&reader_driver);
 743         unregister_chrdev(major, DEVICE_NAME);
 744         class_destroy(cmx_class);
 745 }
 746
 747 module_init(cm4040_init);
 748 module_exit(cm4040_exit);
 749 MODULE_LICENSE("Dual BSD/GPL");