94ecd0342b723570db0869a7a1089ef2cd20d441
[linux-3.10.git] / 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->link.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(dev_link_t *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         dev_link_t              link;
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 dev_link_t *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->link.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->link.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->link.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->link.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->link.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 ((dev->link.state & DEV_PRESENT)==0)
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->link.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 ((dev->link.state & DEV_PRESENT) == 0)
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         dev_link_t *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 || !(DEV_OK(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         dev_link_t *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(dev_link_t *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 void reader_config(dev_link_t *link, int devno)
518 {
519         client_handle_t handle;
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         handle = link->handle;
528
529         tuple.DesiredTuple = CISTPL_CONFIG;
530         tuple.Attributes = 0;
531         tuple.TupleData = buf;
532         tuple.TupleDataMax = sizeof(buf);
533         tuple.TupleOffset = 0;
534
535         if ((fail_rc = pcmcia_get_first_tuple(handle, &tuple)) != CS_SUCCESS) {
536                 fail_fn = GetFirstTuple;
537                 goto cs_failed;
538         }
539         if ((fail_rc = pcmcia_get_tuple_data(handle, &tuple)) != CS_SUCCESS) {
540                 fail_fn = GetTupleData;
541                 goto cs_failed;
542         }
543         if ((fail_rc = pcmcia_parse_tuple(handle, &tuple, &parse))
544                                                         != CS_SUCCESS) {
545                 fail_fn = ParseTuple;
546                 goto cs_failed;
547         }
548
549         link->state |= DEV_CONFIG;
550         link->conf.ConfigBase = parse.config.base;
551         link->conf.Present = parse.config.rmask[0];
552
553         link->io.BasePort2 = 0;
554         link->io.NumPorts2 = 0;
555         link->io.Attributes2 = 0;
556         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
557         for (rc = pcmcia_get_first_tuple(handle, &tuple);
558              rc == CS_SUCCESS;
559              rc = pcmcia_get_next_tuple(handle, &tuple)) {
560                 rc = pcmcia_get_tuple_data(handle, &tuple);
561                 if (rc != CS_SUCCESS)
562                         continue;
563                 rc = pcmcia_parse_tuple(handle, &tuple, &parse);
564                 if (rc != CS_SUCCESS)
565                         continue;
566
567                 link->conf.ConfigIndex = parse.cftable_entry.index;
568
569                 if (!parse.cftable_entry.io.nwin)
570                         continue;
571
572                 link->io.BasePort1 = parse.cftable_entry.io.win[0].base;
573                 link->io.NumPorts1 = parse.cftable_entry.io.win[0].len;
574                 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
575                 if (!(parse.cftable_entry.io.flags & CISTPL_IO_8BIT))
576                         link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
577                 if (!(parse.cftable_entry.io.flags & CISTPL_IO_16BIT))
578                         link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
579                 link->io.IOAddrLines = parse.cftable_entry.io.flags
580                                                 & CISTPL_IO_LINES_MASK;
581                 rc = pcmcia_request_io(handle, &link->io);
582
583                 dev_printk(KERN_INFO, &handle_to_dev(handle), "foo");
584                 if (rc == CS_SUCCESS)
585                         break;
586                 else
587                         dev_printk(KERN_INFO, &handle_to_dev(handle),
588                                    "pcmcia_request_io failed 0x%x\n", rc);
589         }
590         if (rc != CS_SUCCESS)
591                 goto cs_release;
592
593         link->conf.IntType = 00000002;
594
595         if ((fail_rc = pcmcia_request_configuration(handle,&link->conf))
596                                                                 !=CS_SUCCESS) {
597                 fail_fn = RequestConfiguration;
598                 dev_printk(KERN_INFO, &handle_to_dev(handle),
599                            "pcmcia_request_configuration failed 0x%x\n",
600                            fail_rc);
601                 goto cs_release;
602         }
603
604         dev = link->priv;
605         sprintf(dev->node.dev_name, DEVICE_NAME "%d", devno);
606         dev->node.major = major;
607         dev->node.minor = devno;
608         dev->node.next = NULL;
609         link->dev = &dev->node;
610         link->state &= ~DEV_CONFIG_PENDING;
611
612         DEBUGP(2, dev, "device " DEVICE_NAME "%d at 0x%.4x-0x%.4x\n", devno,
613               link->io.BasePort1, link->io.BasePort1+link->io.NumPorts1);
614         DEBUGP(2, dev, "<- reader_config (succ)\n");
615
616         return;
617
618 cs_failed:
619         cs_error(handle, fail_fn, fail_rc);
620 cs_release:
621         reader_release(link);
622         link->state &= ~DEV_CONFIG_PENDING;
623 }
624
625 static void reader_release(dev_link_t *link)
626 {
627         cm4040_reader_release(link->priv);
628         pcmcia_disable_device(link->handle);
629 }
630
631 static int reader_attach(struct pcmcia_device *p_dev)
632 {
633         struct reader_dev *dev;
634         dev_link_t *link;
635         int i;
636
637         for (i = 0; i < CM_MAX_DEV; i++) {
638                 if (dev_table[i] == NULL)
639                         break;
640         }
641
642         if (i == CM_MAX_DEV)
643                 return -ENODEV;
644
645         dev = kzalloc(sizeof(struct reader_dev), GFP_KERNEL);
646         if (dev == NULL)
647                 return -ENOMEM;
648
649         dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
650         dev->buffer_status = 0;
651
652         link = &dev->link;
653         link->priv = dev;
654
655         link->conf.IntType = INT_MEMORY_AND_IO;
656         dev_table[i] = link;
657
658         init_waitqueue_head(&dev->devq);
659         init_waitqueue_head(&dev->poll_wait);
660         init_waitqueue_head(&dev->read_wait);
661         init_waitqueue_head(&dev->write_wait);
662         init_timer(&dev->poll_timer);
663         dev->poll_timer.function = &cm4040_do_poll;
664
665         link->handle = p_dev;
666         p_dev->instance = link;
667
668         link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
669         reader_config(link, i);
670
671         class_device_create(cmx_class, NULL, MKDEV(major, i), NULL,
672                             "cmx%d", i);
673
674         return 0;
675 }
676
677 static void reader_detach(struct pcmcia_device *p_dev)
678 {
679         dev_link_t *link = dev_to_instance(p_dev);
680         struct reader_dev *dev = link->priv;
681         int devno;
682
683         /* find device */
684         for (devno = 0; devno < CM_MAX_DEV; devno++) {
685                 if (dev_table[devno] == link)
686                         break;
687         }
688         if (devno == CM_MAX_DEV)
689                 return;
690
691         link->state &= ~DEV_PRESENT;
692
693         if (link->state & DEV_CONFIG)
694                 reader_release(link);
695
696         dev_table[devno] = NULL;
697         kfree(dev);
698
699         class_device_destroy(cmx_class, MKDEV(major, devno));
700
701         return;
702 }
703
704 static struct file_operations reader_fops = {
705         .owner          = THIS_MODULE,
706         .read           = cm4040_read,
707         .write          = cm4040_write,
708         .open           = cm4040_open,
709         .release        = cm4040_close,
710         .poll           = cm4040_poll,
711 };
712
713 static struct pcmcia_device_id cm4040_ids[] = {
714         PCMCIA_DEVICE_MANF_CARD(0x0223, 0x0200),
715         PCMCIA_DEVICE_PROD_ID12("OMNIKEY", "CardMan 4040",
716                                 0xE32CDD8C, 0x8F23318B),
717         PCMCIA_DEVICE_NULL,
718 };
719 MODULE_DEVICE_TABLE(pcmcia, cm4040_ids);
720
721 static struct pcmcia_driver reader_driver = {
722         .owner          = THIS_MODULE,
723         .drv            = {
724                 .name   = "cm4040_cs",
725         },
726         .probe          = reader_attach,
727         .remove         = reader_detach,
728         .id_table       = cm4040_ids,
729 };
730
731 static int __init cm4040_init(void)
732 {
733         int rc;
734
735         printk(KERN_INFO "%s\n", version);
736         cmx_class = class_create(THIS_MODULE, "cardman_4040");
737         if (!cmx_class)
738                 return -1;
739
740         rc = pcmcia_register_driver(&reader_driver);
741         if (rc < 0)
742                 return rc;
743
744         major = register_chrdev(0, DEVICE_NAME, &reader_fops);
745         if (major < 0) {
746                 printk(KERN_WARNING MODULE_NAME
747                         ": could not get major number\n");
748                 return -1;
749         }
750         return 0;
751 }
752
753 static void __exit cm4040_exit(void)
754 {
755         printk(KERN_INFO MODULE_NAME ": unloading\n");
756         pcmcia_unregister_driver(&reader_driver);
757         unregister_chrdev(major, DEVICE_NAME);
758         class_destroy(cmx_class);
759 }
760
761 module_init(cm4040_init);
762 module_exit(cm4040_exit);
763 MODULE_LICENSE("Dual BSD/GPL");