[Bluetooth] Eliminate checks for impossible conditions in IRQ handler
[linux-2.6.git] / drivers / bluetooth / bt3c_cs.c
1 /*
2  *
3  *  Driver for the 3Com Bluetooth PCMCIA card
4  *
5  *  Copyright (C) 2001-2002  Marcel Holtmann <marcel@holtmann.org>
6  *                           Jose Orlando Pereira <jop@di.uminho.pt>
7  *
8  *
9  *  This program is free software; you can redistribute it and/or modify
10  *  it under the terms of the GNU General Public License version 2 as
11  *  published by the Free Software Foundation;
12  *
13  *  Software distributed under the License is distributed on an "AS
14  *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
15  *  implied. See the License for the specific language governing
16  *  rights and limitations under the License.
17  *
18  *  The initial developer of the original code is David A. Hinds
19  *  <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
20  *  are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
21  *
22  */
23
24 #include <linux/module.h>
25
26 #include <linux/kernel.h>
27 #include <linux/init.h>
28 #include <linux/slab.h>
29 #include <linux/types.h>
30 #include <linux/delay.h>
31 #include <linux/errno.h>
32 #include <linux/ptrace.h>
33 #include <linux/ioport.h>
34 #include <linux/spinlock.h>
35 #include <linux/moduleparam.h>
36
37 #include <linux/skbuff.h>
38 #include <linux/string.h>
39 #include <linux/serial.h>
40 #include <linux/serial_reg.h>
41 #include <linux/bitops.h>
42 #include <asm/system.h>
43 #include <asm/io.h>
44
45 #include <linux/device.h>
46 #include <linux/firmware.h>
47
48 #include <pcmcia/cs_types.h>
49 #include <pcmcia/cs.h>
50 #include <pcmcia/cistpl.h>
51 #include <pcmcia/ciscode.h>
52 #include <pcmcia/ds.h>
53 #include <pcmcia/cisreg.h>
54
55 #include <net/bluetooth/bluetooth.h>
56 #include <net/bluetooth/hci_core.h>
57
58
59
60 /* ======================== Module parameters ======================== */
61
62
63 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>, Jose Orlando Pereira <jop@di.uminho.pt>");
64 MODULE_DESCRIPTION("Bluetooth driver for the 3Com Bluetooth PCMCIA card");
65 MODULE_LICENSE("GPL");
66 MODULE_FIRMWARE("BT3CPCC.bin");
67
68
69
70 /* ======================== Local structures ======================== */
71
72
73 typedef struct bt3c_info_t {
74         struct pcmcia_device *p_dev;
75         dev_node_t node;
76
77         struct hci_dev *hdev;
78
79         spinlock_t lock;                /* For serializing operations */
80
81         struct sk_buff_head txq;
82         unsigned long tx_state;
83
84         unsigned long rx_state;
85         unsigned long rx_count;
86         struct sk_buff *rx_skb;
87 } bt3c_info_t;
88
89
90 static int bt3c_config(struct pcmcia_device *link);
91 static void bt3c_release(struct pcmcia_device *link);
92
93 static void bt3c_detach(struct pcmcia_device *p_dev);
94
95
96 /* Transmit states  */
97 #define XMIT_SENDING  1
98 #define XMIT_WAKEUP   2
99 #define XMIT_WAITING  8
100
101 /* Receiver states */
102 #define RECV_WAIT_PACKET_TYPE   0
103 #define RECV_WAIT_EVENT_HEADER  1
104 #define RECV_WAIT_ACL_HEADER    2
105 #define RECV_WAIT_SCO_HEADER    3
106 #define RECV_WAIT_DATA          4
107
108
109
110 /* ======================== Special I/O functions ======================== */
111
112
113 #define DATA_L   0
114 #define DATA_H   1
115 #define ADDR_L   2
116 #define ADDR_H   3
117 #define CONTROL  4
118
119
120 static inline void bt3c_address(unsigned int iobase, unsigned short addr)
121 {
122         outb(addr & 0xff, iobase + ADDR_L);
123         outb((addr >> 8) & 0xff, iobase + ADDR_H);
124 }
125
126
127 static inline void bt3c_put(unsigned int iobase, unsigned short value)
128 {
129         outb(value & 0xff, iobase + DATA_L);
130         outb((value >> 8) & 0xff, iobase + DATA_H);
131 }
132
133
134 static inline void bt3c_io_write(unsigned int iobase, unsigned short addr, unsigned short value)
135 {
136         bt3c_address(iobase, addr);
137         bt3c_put(iobase, value);
138 }
139
140
141 static inline unsigned short bt3c_get(unsigned int iobase)
142 {
143         unsigned short value = inb(iobase + DATA_L);
144
145         value |= inb(iobase + DATA_H) << 8;
146
147         return value;
148 }
149
150
151 static inline unsigned short bt3c_read(unsigned int iobase, unsigned short addr)
152 {
153         bt3c_address(iobase, addr);
154
155         return bt3c_get(iobase);
156 }
157
158
159
160 /* ======================== Interrupt handling ======================== */
161
162
163 static int bt3c_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
164 {
165         int actual = 0;
166
167         bt3c_address(iobase, 0x7080);
168
169         /* Fill FIFO with current frame */
170         while (actual < len) {
171                 /* Transmit next byte */
172                 bt3c_put(iobase, buf[actual]);
173                 actual++;
174         }
175
176         bt3c_io_write(iobase, 0x7005, actual);
177
178         return actual;
179 }
180
181
182 static void bt3c_write_wakeup(bt3c_info_t *info)
183 {
184         if (!info) {
185                 BT_ERR("Unknown device");
186                 return;
187         }
188
189         if (test_and_set_bit(XMIT_SENDING, &(info->tx_state)))
190                 return;
191
192         do {
193                 register unsigned int iobase = info->p_dev->io.BasePort1;
194                 register struct sk_buff *skb;
195                 register int len;
196
197                 if (!pcmcia_dev_present(info->p_dev))
198                         break;
199
200
201                 if (!(skb = skb_dequeue(&(info->txq)))) {
202                         clear_bit(XMIT_SENDING, &(info->tx_state));
203                         break;
204                 }
205
206                 /* Send frame */
207                 len = bt3c_write(iobase, 256, skb->data, skb->len);
208
209                 if (len != skb->len) {
210                         BT_ERR("Very strange");
211                 }
212
213                 kfree_skb(skb);
214
215                 info->hdev->stat.byte_tx += len;
216
217         } while (0);
218 }
219
220
221 static void bt3c_receive(bt3c_info_t *info)
222 {
223         unsigned int iobase;
224         int size = 0, avail;
225
226         if (!info) {
227                 BT_ERR("Unknown device");
228                 return;
229         }
230
231         iobase = info->p_dev->io.BasePort1;
232
233         avail = bt3c_read(iobase, 0x7006);
234         //printk("bt3c_cs: receiving %d bytes\n", avail);
235
236         bt3c_address(iobase, 0x7480);
237         while (size < avail) {
238                 size++;
239                 info->hdev->stat.byte_rx++;
240
241                 /* Allocate packet */
242                 if (info->rx_skb == NULL) {
243                         info->rx_state = RECV_WAIT_PACKET_TYPE;
244                         info->rx_count = 0;
245                         if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
246                                 BT_ERR("Can't allocate mem for new packet");
247                                 return;
248                         }
249                 }
250
251
252                 if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
253
254                         info->rx_skb->dev = (void *) info->hdev;
255                         bt_cb(info->rx_skb)->pkt_type = inb(iobase + DATA_L);
256                         inb(iobase + DATA_H);
257                         //printk("bt3c: PACKET_TYPE=%02x\n", bt_cb(info->rx_skb)->pkt_type);
258
259                         switch (bt_cb(info->rx_skb)->pkt_type) {
260
261                         case HCI_EVENT_PKT:
262                                 info->rx_state = RECV_WAIT_EVENT_HEADER;
263                                 info->rx_count = HCI_EVENT_HDR_SIZE;
264                                 break;
265
266                         case HCI_ACLDATA_PKT:
267                                 info->rx_state = RECV_WAIT_ACL_HEADER;
268                                 info->rx_count = HCI_ACL_HDR_SIZE;
269                                 break;
270
271                         case HCI_SCODATA_PKT:
272                                 info->rx_state = RECV_WAIT_SCO_HEADER;
273                                 info->rx_count = HCI_SCO_HDR_SIZE;
274                                 break;
275
276                         default:
277                                 /* Unknown packet */
278                                 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
279                                 info->hdev->stat.err_rx++;
280                                 clear_bit(HCI_RUNNING, &(info->hdev->flags));
281
282                                 kfree_skb(info->rx_skb);
283                                 info->rx_skb = NULL;
284                                 break;
285
286                         }
287
288                 } else {
289
290                         __u8 x = inb(iobase + DATA_L);
291
292                         *skb_put(info->rx_skb, 1) = x;
293                         inb(iobase + DATA_H);
294                         info->rx_count--;
295
296                         if (info->rx_count == 0) {
297
298                                 int dlen;
299                                 struct hci_event_hdr *eh;
300                                 struct hci_acl_hdr *ah;
301                                 struct hci_sco_hdr *sh;
302
303                                 switch (info->rx_state) {
304
305                                 case RECV_WAIT_EVENT_HEADER:
306                                         eh = hci_event_hdr(info->rx_skb);
307                                         info->rx_state = RECV_WAIT_DATA;
308                                         info->rx_count = eh->plen;
309                                         break;
310
311                                 case RECV_WAIT_ACL_HEADER:
312                                         ah = hci_acl_hdr(info->rx_skb);
313                                         dlen = __le16_to_cpu(ah->dlen);
314                                         info->rx_state = RECV_WAIT_DATA;
315                                         info->rx_count = dlen;
316                                         break;
317
318                                 case RECV_WAIT_SCO_HEADER:
319                                         sh = hci_sco_hdr(info->rx_skb);
320                                         info->rx_state = RECV_WAIT_DATA;
321                                         info->rx_count = sh->dlen;
322                                         break;
323
324                                 case RECV_WAIT_DATA:
325                                         hci_recv_frame(info->rx_skb);
326                                         info->rx_skb = NULL;
327                                         break;
328
329                                 }
330
331                         }
332
333                 }
334
335         }
336
337         bt3c_io_write(iobase, 0x7006, 0x0000);
338 }
339
340
341 static irqreturn_t bt3c_interrupt(int irq, void *dev_inst)
342 {
343         bt3c_info_t *info = dev_inst;
344         unsigned int iobase;
345         int iir;
346
347         BUG_ON(!info->hdev);
348
349         iobase = info->p_dev->io.BasePort1;
350
351         spin_lock(&(info->lock));
352
353         iir = inb(iobase + CONTROL);
354         if (iir & 0x80) {
355                 int stat = bt3c_read(iobase, 0x7001);
356
357                 if ((stat & 0xff) == 0x7f) {
358                         BT_ERR("Very strange (stat=0x%04x)", stat);
359                 } else if ((stat & 0xff) != 0xff) {
360                         if (stat & 0x0020) {
361                                 int stat = bt3c_read(iobase, 0x7002) & 0x10;
362                                 BT_INFO("%s: Antenna %s", info->hdev->name,
363                                                         stat ? "out" : "in");
364                         }
365                         if (stat & 0x0001)
366                                 bt3c_receive(info);
367                         if (stat & 0x0002) {
368                                 //BT_ERR("Ack (stat=0x%04x)", stat);
369                                 clear_bit(XMIT_SENDING, &(info->tx_state));
370                                 bt3c_write_wakeup(info);
371                         }
372
373                         bt3c_io_write(iobase, 0x7001, 0x0000);
374
375                         outb(iir, iobase + CONTROL);
376                 }
377         }
378
379         spin_unlock(&(info->lock));
380
381         return IRQ_HANDLED;
382 }
383
384
385
386 /* ======================== HCI interface ======================== */
387
388
389 static int bt3c_hci_flush(struct hci_dev *hdev)
390 {
391         bt3c_info_t *info = (bt3c_info_t *)(hdev->driver_data);
392
393         /* Drop TX queue */
394         skb_queue_purge(&(info->txq));
395
396         return 0;
397 }
398
399
400 static int bt3c_hci_open(struct hci_dev *hdev)
401 {
402         set_bit(HCI_RUNNING, &(hdev->flags));
403
404         return 0;
405 }
406
407
408 static int bt3c_hci_close(struct hci_dev *hdev)
409 {
410         if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
411                 return 0;
412
413         bt3c_hci_flush(hdev);
414
415         return 0;
416 }
417
418
419 static int bt3c_hci_send_frame(struct sk_buff *skb)
420 {
421         bt3c_info_t *info;
422         struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
423         unsigned long flags;
424
425         if (!hdev) {
426                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
427                 return -ENODEV;
428         }
429
430         info = (bt3c_info_t *) (hdev->driver_data);
431
432         switch (bt_cb(skb)->pkt_type) {
433         case HCI_COMMAND_PKT:
434                 hdev->stat.cmd_tx++;
435                 break;
436         case HCI_ACLDATA_PKT:
437                 hdev->stat.acl_tx++;
438                 break;
439         case HCI_SCODATA_PKT:
440                 hdev->stat.sco_tx++;
441                 break;
442         };
443
444         /* Prepend skb with frame type */
445         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
446         skb_queue_tail(&(info->txq), skb);
447
448         spin_lock_irqsave(&(info->lock), flags);
449
450         bt3c_write_wakeup(info);
451
452         spin_unlock_irqrestore(&(info->lock), flags);
453
454         return 0;
455 }
456
457
458 static void bt3c_hci_destruct(struct hci_dev *hdev)
459 {
460 }
461
462
463 static int bt3c_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
464 {
465         return -ENOIOCTLCMD;
466 }
467
468
469
470 /* ======================== Card services HCI interaction ======================== */
471
472
473 static int bt3c_load_firmware(bt3c_info_t *info, unsigned char *firmware, int count)
474 {
475         char *ptr = (char *) firmware;
476         char b[9];
477         unsigned int iobase, size, addr, fcs, tmp;
478         int i, err = 0;
479
480         iobase = info->p_dev->io.BasePort1;
481
482         /* Reset */
483         bt3c_io_write(iobase, 0x8040, 0x0404);
484         bt3c_io_write(iobase, 0x8040, 0x0400);
485
486         udelay(1);
487
488         bt3c_io_write(iobase, 0x8040, 0x0404);
489
490         udelay(17);
491
492         /* Load */
493         while (count) {
494                 if (ptr[0] != 'S') {
495                         BT_ERR("Bad address in firmware");
496                         err = -EFAULT;
497                         goto error;
498                 }
499
500                 memset(b, 0, sizeof(b));
501                 memcpy(b, ptr + 2, 2);
502                 size = simple_strtol(b, NULL, 16);
503
504                 memset(b, 0, sizeof(b));
505                 memcpy(b, ptr + 4, 8);
506                 addr = simple_strtol(b, NULL, 16);
507
508                 memset(b, 0, sizeof(b));
509                 memcpy(b, ptr + (size * 2) + 2, 2);
510                 fcs = simple_strtol(b, NULL, 16);
511
512                 memset(b, 0, sizeof(b));
513                 for (tmp = 0, i = 0; i < size; i++) {
514                         memcpy(b, ptr + (i * 2) + 2, 2);
515                         tmp += simple_strtol(b, NULL, 16);
516                 }
517
518                 if (((tmp + fcs) & 0xff) != 0xff) {
519                         BT_ERR("Checksum error in firmware");
520                         err = -EILSEQ;
521                         goto error;
522                 }
523
524                 if (ptr[1] == '3') {
525                         bt3c_address(iobase, addr);
526
527                         memset(b, 0, sizeof(b));
528                         for (i = 0; i < (size - 4) / 2; i++) {
529                                 memcpy(b, ptr + (i * 4) + 12, 4);
530                                 tmp = simple_strtol(b, NULL, 16);
531                                 bt3c_put(iobase, tmp);
532                         }
533                 }
534
535                 ptr   += (size * 2) + 6;
536                 count -= (size * 2) + 6;
537         }
538
539         udelay(17);
540
541         /* Boot */
542         bt3c_address(iobase, 0x3000);
543         outb(inb(iobase + CONTROL) | 0x40, iobase + CONTROL);
544
545 error:
546         udelay(17);
547
548         /* Clear */
549         bt3c_io_write(iobase, 0x7006, 0x0000);
550         bt3c_io_write(iobase, 0x7005, 0x0000);
551         bt3c_io_write(iobase, 0x7001, 0x0000);
552
553         return err;
554 }
555
556
557 static int bt3c_open(bt3c_info_t *info)
558 {
559         const struct firmware *firmware;
560         struct hci_dev *hdev;
561         int err;
562
563         spin_lock_init(&(info->lock));
564
565         skb_queue_head_init(&(info->txq));
566
567         info->rx_state = RECV_WAIT_PACKET_TYPE;
568         info->rx_count = 0;
569         info->rx_skb = NULL;
570
571         /* Initialize HCI device */
572         hdev = hci_alloc_dev();
573         if (!hdev) {
574                 BT_ERR("Can't allocate HCI device");
575                 return -ENOMEM;
576         }
577
578         info->hdev = hdev;
579
580         hdev->type = HCI_PCCARD;
581         hdev->driver_data = info;
582         SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
583
584         hdev->open     = bt3c_hci_open;
585         hdev->close    = bt3c_hci_close;
586         hdev->flush    = bt3c_hci_flush;
587         hdev->send     = bt3c_hci_send_frame;
588         hdev->destruct = bt3c_hci_destruct;
589         hdev->ioctl    = bt3c_hci_ioctl;
590
591         hdev->owner = THIS_MODULE;
592
593         /* Load firmware */
594         err = request_firmware(&firmware, "BT3CPCC.bin", &info->p_dev->dev);
595         if (err < 0) {
596                 BT_ERR("Firmware request failed");
597                 goto error;
598         }
599
600         err = bt3c_load_firmware(info, firmware->data, firmware->size);
601
602         release_firmware(firmware);
603
604         if (err < 0) {
605                 BT_ERR("Firmware loading failed");
606                 goto error;
607         }
608
609         /* Timeout before it is safe to send the first HCI packet */
610         msleep(1000);
611
612         /* Register HCI device */
613         err = hci_register_dev(hdev);
614         if (err < 0) {
615                 BT_ERR("Can't register HCI device");
616                 goto error;
617         }
618
619         return 0;
620
621 error:
622         info->hdev = NULL;
623         hci_free_dev(hdev);
624         return err;
625 }
626
627
628 static int bt3c_close(bt3c_info_t *info)
629 {
630         struct hci_dev *hdev = info->hdev;
631
632         if (!hdev)
633                 return -ENODEV;
634
635         bt3c_hci_close(hdev);
636
637         if (hci_unregister_dev(hdev) < 0)
638                 BT_ERR("Can't unregister HCI device %s", hdev->name);
639
640         hci_free_dev(hdev);
641
642         return 0;
643 }
644
645 static int bt3c_probe(struct pcmcia_device *link)
646 {
647         bt3c_info_t *info;
648
649         /* Create new info device */
650         info = kzalloc(sizeof(*info), GFP_KERNEL);
651         if (!info)
652                 return -ENOMEM;
653
654         info->p_dev = link;
655         link->priv = info;
656
657         link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
658         link->io.NumPorts1 = 8;
659         link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
660         link->irq.IRQInfo1 = IRQ_LEVEL_ID;
661
662         link->irq.Handler = bt3c_interrupt;
663         link->irq.Instance = info;
664
665         link->conf.Attributes = CONF_ENABLE_IRQ;
666         link->conf.IntType = INT_MEMORY_AND_IO;
667
668         return bt3c_config(link);
669 }
670
671
672 static void bt3c_detach(struct pcmcia_device *link)
673 {
674         bt3c_info_t *info = link->priv;
675
676         bt3c_release(link);
677         kfree(info);
678 }
679
680 static int get_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
681 {
682         int i;
683
684         i = pcmcia_get_tuple_data(handle, tuple);
685         if (i != CS_SUCCESS)
686                 return i;
687
688         return pcmcia_parse_tuple(handle, tuple, parse);
689 }
690
691 static int first_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
692 {
693         if (pcmcia_get_first_tuple(handle, tuple) != CS_SUCCESS)
694                 return CS_NO_MORE_ITEMS;
695         return get_tuple(handle, tuple, parse);
696 }
697
698 static int next_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
699 {
700         if (pcmcia_get_next_tuple(handle, tuple) != CS_SUCCESS)
701                 return CS_NO_MORE_ITEMS;
702         return get_tuple(handle, tuple, parse);
703 }
704
705 static int bt3c_config(struct pcmcia_device *link)
706 {
707         static kio_addr_t base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
708         bt3c_info_t *info = link->priv;
709         tuple_t tuple;
710         u_short buf[256];
711         cisparse_t parse;
712         cistpl_cftable_entry_t *cf = &parse.cftable_entry;
713         int i, j, try;
714
715         /* First pass: look for a config entry that looks normal. */
716         tuple.TupleData = (cisdata_t *)buf;
717         tuple.TupleOffset = 0;
718         tuple.TupleDataMax = 255;
719         tuple.Attributes = 0;
720         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
721         /* Two tries: without IO aliases, then with aliases */
722         for (try = 0; try < 2; try++) {
723                 i = first_tuple(link, &tuple, &parse);
724                 while (i != CS_NO_MORE_ITEMS) {
725                         if (i != CS_SUCCESS)
726                                 goto next_entry;
727                         if (cf->vpp1.present & (1 << CISTPL_POWER_VNOM))
728                                 link->conf.Vpp = cf->vpp1.param[CISTPL_POWER_VNOM] / 10000;
729                         if ((cf->io.nwin > 0) && (cf->io.win[0].len == 8) && (cf->io.win[0].base != 0)) {
730                                 link->conf.ConfigIndex = cf->index;
731                                 link->io.BasePort1 = cf->io.win[0].base;
732                                 link->io.IOAddrLines = (try == 0) ? 16 : cf->io.flags & CISTPL_IO_LINES_MASK;
733                                 i = pcmcia_request_io(link, &link->io);
734                                 if (i == CS_SUCCESS)
735                                         goto found_port;
736                         }
737 next_entry:
738                         i = next_tuple(link, &tuple, &parse);
739                 }
740         }
741
742         /* Second pass: try to find an entry that isn't picky about
743            its base address, then try to grab any standard serial port
744            address, and finally try to get any free port. */
745         i = first_tuple(link, &tuple, &parse);
746         while (i != CS_NO_MORE_ITEMS) {
747                 if ((i == CS_SUCCESS) && (cf->io.nwin > 0) && ((cf->io.flags & CISTPL_IO_LINES_MASK) <= 3)) {
748                         link->conf.ConfigIndex = cf->index;
749                         for (j = 0; j < 5; j++) {
750                                 link->io.BasePort1 = base[j];
751                                 link->io.IOAddrLines = base[j] ? 16 : 3;
752                                 i = pcmcia_request_io(link, &link->io);
753                                 if (i == CS_SUCCESS)
754                                         goto found_port;
755                         }
756                 }
757                 i = next_tuple(link, &tuple, &parse);
758         }
759
760 found_port:
761         if (i != CS_SUCCESS) {
762                 BT_ERR("No usable port range found");
763                 cs_error(link, RequestIO, i);
764                 goto failed;
765         }
766
767         i = pcmcia_request_irq(link, &link->irq);
768         if (i != CS_SUCCESS) {
769                 cs_error(link, RequestIRQ, i);
770                 link->irq.AssignedIRQ = 0;
771         }
772
773         i = pcmcia_request_configuration(link, &link->conf);
774         if (i != CS_SUCCESS) {
775                 cs_error(link, RequestConfiguration, i);
776                 goto failed;
777         }
778
779         if (bt3c_open(info) != 0)
780                 goto failed;
781
782         strcpy(info->node.dev_name, info->hdev->name);
783         link->dev_node = &info->node;
784
785         return 0;
786
787 failed:
788         bt3c_release(link);
789         return -ENODEV;
790 }
791
792
793 static void bt3c_release(struct pcmcia_device *link)
794 {
795         bt3c_info_t *info = link->priv;
796
797         bt3c_close(info);
798
799         pcmcia_disable_device(link);
800 }
801
802
803 static struct pcmcia_device_id bt3c_ids[] = {
804         PCMCIA_DEVICE_PROD_ID13("3COM", "Bluetooth PC Card", 0xefce0a31, 0xd4ce9b02),
805         PCMCIA_DEVICE_NULL
806 };
807 MODULE_DEVICE_TABLE(pcmcia, bt3c_ids);
808
809 static struct pcmcia_driver bt3c_driver = {
810         .owner          = THIS_MODULE,
811         .drv            = {
812                 .name   = "bt3c_cs",
813         },
814         .probe          = bt3c_probe,
815         .remove         = bt3c_detach,
816         .id_table       = bt3c_ids,
817 };
818
819 static int __init init_bt3c_cs(void)
820 {
821         return pcmcia_register_driver(&bt3c_driver);
822 }
823
824
825 static void __exit exit_bt3c_cs(void)
826 {
827         pcmcia_unregister_driver(&bt3c_driver);
828 }
829
830 module_init(init_bt3c_cs);
831 module_exit(exit_bt3c_cs);