[PATCH] pcmcia: add return value to _config() functions
[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/config.h>
25 #include <linux/module.h>
26
27 #include <linux/kernel.h>
28 #include <linux/init.h>
29 #include <linux/slab.h>
30 #include <linux/types.h>
31 #include <linux/sched.h>
32 #include <linux/delay.h>
33 #include <linux/errno.h>
34 #include <linux/ptrace.h>
35 #include <linux/ioport.h>
36 #include <linux/spinlock.h>
37 #include <linux/moduleparam.h>
38
39 #include <linux/skbuff.h>
40 #include <linux/string.h>
41 #include <linux/serial.h>
42 #include <linux/serial_reg.h>
43 #include <linux/bitops.h>
44 #include <asm/system.h>
45 #include <asm/io.h>
46
47 #include <linux/device.h>
48 #include <linux/firmware.h>
49
50 #include <pcmcia/cs_types.h>
51 #include <pcmcia/cs.h>
52 #include <pcmcia/cistpl.h>
53 #include <pcmcia/ciscode.h>
54 #include <pcmcia/ds.h>
55 #include <pcmcia/cisreg.h>
56
57 #include <net/bluetooth/bluetooth.h>
58 #include <net/bluetooth/hci_core.h>
59
60
61
62 /* ======================== Module parameters ======================== */
63
64
65 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>, Jose Orlando Pereira <jop@di.uminho.pt>");
66 MODULE_DESCRIPTION("Bluetooth driver for the 3Com Bluetooth PCMCIA card");
67 MODULE_LICENSE("GPL");
68
69
70
71 /* ======================== Local structures ======================== */
72
73
74 typedef struct bt3c_info_t {
75         struct pcmcia_device *p_dev;
76         dev_node_t node;
77
78         struct hci_dev *hdev;
79
80         spinlock_t lock;                /* For serializing operations */
81
82         struct sk_buff_head txq;
83         unsigned long tx_state;
84
85         unsigned long rx_state;
86         unsigned long rx_count;
87         struct sk_buff *rx_skb;
88 } bt3c_info_t;
89
90
91 static int bt3c_config(struct pcmcia_device *link);
92 static void bt3c_release(struct pcmcia_device *link);
93
94 static void bt3c_detach(struct pcmcia_device *p_dev);
95
96
97 /* Transmit states  */
98 #define XMIT_SENDING  1
99 #define XMIT_WAKEUP   2
100 #define XMIT_WAITING  8
101
102 /* Receiver states */
103 #define RECV_WAIT_PACKET_TYPE   0
104 #define RECV_WAIT_EVENT_HEADER  1
105 #define RECV_WAIT_ACL_HEADER    2
106 #define RECV_WAIT_SCO_HEADER    3
107 #define RECV_WAIT_DATA          4
108
109
110
111 /* ======================== Special I/O functions ======================== */
112
113
114 #define DATA_L   0
115 #define DATA_H   1
116 #define ADDR_L   2
117 #define ADDR_H   3
118 #define CONTROL  4
119
120
121 static inline void bt3c_address(unsigned int iobase, unsigned short addr)
122 {
123         outb(addr & 0xff, iobase + ADDR_L);
124         outb((addr >> 8) & 0xff, iobase + ADDR_H);
125 }
126
127
128 static inline void bt3c_put(unsigned int iobase, unsigned short value)
129 {
130         outb(value & 0xff, iobase + DATA_L);
131         outb((value >> 8) & 0xff, iobase + DATA_H);
132 }
133
134
135 static inline void bt3c_io_write(unsigned int iobase, unsigned short addr, unsigned short value)
136 {
137         bt3c_address(iobase, addr);
138         bt3c_put(iobase, value);
139 }
140
141
142 static inline unsigned short bt3c_get(unsigned int iobase)
143 {
144         unsigned short value = inb(iobase + DATA_L);
145
146         value |= inb(iobase + DATA_H) << 8;
147
148         return value;
149 }
150
151
152 static inline unsigned short bt3c_read(unsigned int iobase, unsigned short addr)
153 {
154         bt3c_address(iobase, addr);
155
156         return bt3c_get(iobase);
157 }
158
159
160
161 /* ======================== Interrupt handling ======================== */
162
163
164 static int bt3c_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
165 {
166         int actual = 0;
167
168         bt3c_address(iobase, 0x7080);
169
170         /* Fill FIFO with current frame */
171         while (actual < len) {
172                 /* Transmit next byte */
173                 bt3c_put(iobase, buf[actual]);
174                 actual++;
175         }
176
177         bt3c_io_write(iobase, 0x7005, actual);
178
179         return actual;
180 }
181
182
183 static void bt3c_write_wakeup(bt3c_info_t *info)
184 {
185         if (!info) {
186                 BT_ERR("Unknown device");
187                 return;
188         }
189
190         if (test_and_set_bit(XMIT_SENDING, &(info->tx_state)))
191                 return;
192
193         do {
194                 register unsigned int iobase = info->p_dev->io.BasePort1;
195                 register struct sk_buff *skb;
196                 register int len;
197
198                 if (!(info->p_dev->state & DEV_PRESENT))
199                         break;
200
201
202                 if (!(skb = skb_dequeue(&(info->txq)))) {
203                         clear_bit(XMIT_SENDING, &(info->tx_state));
204                         break;
205                 }
206
207                 /* Send frame */
208                 len = bt3c_write(iobase, 256, skb->data, skb->len);
209
210                 if (len != skb->len) {
211                         BT_ERR("Very strange");
212                 }
213
214                 kfree_skb(skb);
215
216                 info->hdev->stat.byte_tx += len;
217
218         } while (0);
219 }
220
221
222 static void bt3c_receive(bt3c_info_t *info)
223 {
224         unsigned int iobase;
225         int size = 0, avail;
226
227         if (!info) {
228                 BT_ERR("Unknown device");
229                 return;
230         }
231
232         iobase = info->p_dev->io.BasePort1;
233
234         avail = bt3c_read(iobase, 0x7006);
235         //printk("bt3c_cs: receiving %d bytes\n", avail);
236
237         bt3c_address(iobase, 0x7480);
238         while (size < avail) {
239                 size++;
240                 info->hdev->stat.byte_rx++;
241
242                 /* Allocate packet */
243                 if (info->rx_skb == NULL) {
244                         info->rx_state = RECV_WAIT_PACKET_TYPE;
245                         info->rx_count = 0;
246                         if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
247                                 BT_ERR("Can't allocate mem for new packet");
248                                 return;
249                         }
250                 }
251
252
253                 if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
254
255                         info->rx_skb->dev = (void *) info->hdev;
256                         bt_cb(info->rx_skb)->pkt_type = inb(iobase + DATA_L);
257                         inb(iobase + DATA_H);
258                         //printk("bt3c: PACKET_TYPE=%02x\n", bt_cb(info->rx_skb)->pkt_type);
259
260                         switch (bt_cb(info->rx_skb)->pkt_type) {
261
262                         case HCI_EVENT_PKT:
263                                 info->rx_state = RECV_WAIT_EVENT_HEADER;
264                                 info->rx_count = HCI_EVENT_HDR_SIZE;
265                                 break;
266
267                         case HCI_ACLDATA_PKT:
268                                 info->rx_state = RECV_WAIT_ACL_HEADER;
269                                 info->rx_count = HCI_ACL_HDR_SIZE;
270                                 break;
271
272                         case HCI_SCODATA_PKT:
273                                 info->rx_state = RECV_WAIT_SCO_HEADER;
274                                 info->rx_count = HCI_SCO_HDR_SIZE;
275                                 break;
276
277                         default:
278                                 /* Unknown packet */
279                                 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
280                                 info->hdev->stat.err_rx++;
281                                 clear_bit(HCI_RUNNING, &(info->hdev->flags));
282
283                                 kfree_skb(info->rx_skb);
284                                 info->rx_skb = NULL;
285                                 break;
286
287                         }
288
289                 } else {
290
291                         __u8 x = inb(iobase + DATA_L);
292
293                         *skb_put(info->rx_skb, 1) = x;
294                         inb(iobase + DATA_H);
295                         info->rx_count--;
296
297                         if (info->rx_count == 0) {
298
299                                 int dlen;
300                                 struct hci_event_hdr *eh;
301                                 struct hci_acl_hdr *ah;
302                                 struct hci_sco_hdr *sh;
303
304                                 switch (info->rx_state) {
305
306                                 case RECV_WAIT_EVENT_HEADER:
307                                         eh = (struct hci_event_hdr *)(info->rx_skb->data);
308                                         info->rx_state = RECV_WAIT_DATA;
309                                         info->rx_count = eh->plen;
310                                         break;
311
312                                 case RECV_WAIT_ACL_HEADER:
313                                         ah = (struct hci_acl_hdr *)(info->rx_skb->data);
314                                         dlen = __le16_to_cpu(ah->dlen);
315                                         info->rx_state = RECV_WAIT_DATA;
316                                         info->rx_count = dlen;
317                                         break;
318
319                                 case RECV_WAIT_SCO_HEADER:
320                                         sh = (struct hci_sco_hdr *)(info->rx_skb->data);
321                                         info->rx_state = RECV_WAIT_DATA;
322                                         info->rx_count = sh->dlen;
323                                         break;
324
325                                 case RECV_WAIT_DATA:
326                                         hci_recv_frame(info->rx_skb);
327                                         info->rx_skb = NULL;
328                                         break;
329
330                                 }
331
332                         }
333
334                 }
335
336         }
337
338         bt3c_io_write(iobase, 0x7006, 0x0000);
339 }
340
341
342 static irqreturn_t bt3c_interrupt(int irq, void *dev_inst, struct pt_regs *regs)
343 {
344         bt3c_info_t *info = dev_inst;
345         unsigned int iobase;
346         int iir;
347
348         if (!info || !info->hdev) {
349                 BT_ERR("Call of irq %d for unknown device", irq);
350                 return IRQ_NONE;
351         }
352
353         iobase = info->p_dev->io.BasePort1;
354
355         spin_lock(&(info->lock));
356
357         iir = inb(iobase + CONTROL);
358         if (iir & 0x80) {
359                 int stat = bt3c_read(iobase, 0x7001);
360
361                 if ((stat & 0xff) == 0x7f) {
362                         BT_ERR("Very strange (stat=0x%04x)", stat);
363                 } else if ((stat & 0xff) != 0xff) {
364                         if (stat & 0x0020) {
365                                 int stat = bt3c_read(iobase, 0x7002) & 0x10;
366                                 BT_INFO("%s: Antenna %s", info->hdev->name,
367                                                         stat ? "out" : "in");
368                         }
369                         if (stat & 0x0001)
370                                 bt3c_receive(info);
371                         if (stat & 0x0002) {
372                                 //BT_ERR("Ack (stat=0x%04x)", stat);
373                                 clear_bit(XMIT_SENDING, &(info->tx_state));
374                                 bt3c_write_wakeup(info);
375                         }
376
377                         bt3c_io_write(iobase, 0x7001, 0x0000);
378
379                         outb(iir, iobase + CONTROL);
380                 }
381         }
382
383         spin_unlock(&(info->lock));
384
385         return IRQ_HANDLED;
386 }
387
388
389
390 /* ======================== HCI interface ======================== */
391
392
393 static int bt3c_hci_flush(struct hci_dev *hdev)
394 {
395         bt3c_info_t *info = (bt3c_info_t *)(hdev->driver_data);
396
397         /* Drop TX queue */
398         skb_queue_purge(&(info->txq));
399
400         return 0;
401 }
402
403
404 static int bt3c_hci_open(struct hci_dev *hdev)
405 {
406         set_bit(HCI_RUNNING, &(hdev->flags));
407
408         return 0;
409 }
410
411
412 static int bt3c_hci_close(struct hci_dev *hdev)
413 {
414         if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
415                 return 0;
416
417         bt3c_hci_flush(hdev);
418
419         return 0;
420 }
421
422
423 static int bt3c_hci_send_frame(struct sk_buff *skb)
424 {
425         bt3c_info_t *info;
426         struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
427         unsigned long flags;
428
429         if (!hdev) {
430                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
431                 return -ENODEV;
432         }
433
434         info = (bt3c_info_t *) (hdev->driver_data);
435
436         switch (bt_cb(skb)->pkt_type) {
437         case HCI_COMMAND_PKT:
438                 hdev->stat.cmd_tx++;
439                 break;
440         case HCI_ACLDATA_PKT:
441                 hdev->stat.acl_tx++;
442                 break;
443         case HCI_SCODATA_PKT:
444                 hdev->stat.sco_tx++;
445                 break;
446         };
447
448         /* Prepend skb with frame type */
449         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
450         skb_queue_tail(&(info->txq), skb);
451
452         spin_lock_irqsave(&(info->lock), flags);
453
454         bt3c_write_wakeup(info);
455
456         spin_unlock_irqrestore(&(info->lock), flags);
457
458         return 0;
459 }
460
461
462 static void bt3c_hci_destruct(struct hci_dev *hdev)
463 {
464 }
465
466
467 static int bt3c_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
468 {
469         return -ENOIOCTLCMD;
470 }
471
472
473
474 /* ======================== Card services HCI interaction ======================== */
475
476
477 static int bt3c_load_firmware(bt3c_info_t *info, unsigned char *firmware, int count)
478 {
479         char *ptr = (char *) firmware;
480         char b[9];
481         unsigned int iobase, size, addr, fcs, tmp;
482         int i, err = 0;
483
484         iobase = info->p_dev->io.BasePort1;
485
486         /* Reset */
487         bt3c_io_write(iobase, 0x8040, 0x0404);
488         bt3c_io_write(iobase, 0x8040, 0x0400);
489
490         udelay(1);
491
492         bt3c_io_write(iobase, 0x8040, 0x0404);
493
494         udelay(17);
495
496         /* Load */
497         while (count) {
498                 if (ptr[0] != 'S') {
499                         BT_ERR("Bad address in firmware");
500                         err = -EFAULT;
501                         goto error;
502                 }
503
504                 memset(b, 0, sizeof(b));
505                 memcpy(b, ptr + 2, 2);
506                 size = simple_strtol(b, NULL, 16);
507
508                 memset(b, 0, sizeof(b));
509                 memcpy(b, ptr + 4, 8);
510                 addr = simple_strtol(b, NULL, 16);
511
512                 memset(b, 0, sizeof(b));
513                 memcpy(b, ptr + (size * 2) + 2, 2);
514                 fcs = simple_strtol(b, NULL, 16);
515
516                 memset(b, 0, sizeof(b));
517                 for (tmp = 0, i = 0; i < size; i++) {
518                         memcpy(b, ptr + (i * 2) + 2, 2);
519                         tmp += simple_strtol(b, NULL, 16);
520                 }
521
522                 if (((tmp + fcs) & 0xff) != 0xff) {
523                         BT_ERR("Checksum error in firmware");
524                         err = -EILSEQ;
525                         goto error;
526                 }
527
528                 if (ptr[1] == '3') {
529                         bt3c_address(iobase, addr);
530
531                         memset(b, 0, sizeof(b));
532                         for (i = 0; i < (size - 4) / 2; i++) {
533                                 memcpy(b, ptr + (i * 4) + 12, 4);
534                                 tmp = simple_strtol(b, NULL, 16);
535                                 bt3c_put(iobase, tmp);
536                         }
537                 }
538
539                 ptr   += (size * 2) + 6;
540                 count -= (size * 2) + 6;
541         }
542
543         udelay(17);
544
545         /* Boot */
546         bt3c_address(iobase, 0x3000);
547         outb(inb(iobase + CONTROL) | 0x40, iobase + CONTROL);
548
549 error:
550         udelay(17);
551
552         /* Clear */
553         bt3c_io_write(iobase, 0x7006, 0x0000);
554         bt3c_io_write(iobase, 0x7005, 0x0000);
555         bt3c_io_write(iobase, 0x7001, 0x0000);
556
557         return err;
558 }
559
560
561 static int bt3c_open(bt3c_info_t *info)
562 {
563         const struct firmware *firmware;
564         struct hci_dev *hdev;
565         int err;
566
567         spin_lock_init(&(info->lock));
568
569         skb_queue_head_init(&(info->txq));
570
571         info->rx_state = RECV_WAIT_PACKET_TYPE;
572         info->rx_count = 0;
573         info->rx_skb = NULL;
574
575         /* Initialize HCI device */
576         hdev = hci_alloc_dev();
577         if (!hdev) {
578                 BT_ERR("Can't allocate HCI device");
579                 return -ENOMEM;
580         }
581
582         info->hdev = hdev;
583
584         hdev->type = HCI_PCCARD;
585         hdev->driver_data = info;
586
587         hdev->open     = bt3c_hci_open;
588         hdev->close    = bt3c_hci_close;
589         hdev->flush    = bt3c_hci_flush;
590         hdev->send     = bt3c_hci_send_frame;
591         hdev->destruct = bt3c_hci_destruct;
592         hdev->ioctl    = bt3c_hci_ioctl;
593
594         hdev->owner = THIS_MODULE;
595
596         /* Load firmware */
597         err = request_firmware(&firmware, "BT3CPCC.bin", &info->p_dev->dev);
598         if (err < 0) {
599                 BT_ERR("Firmware request failed");
600                 goto error;
601         }
602
603         err = bt3c_load_firmware(info, firmware->data, firmware->size);
604
605         release_firmware(firmware);
606
607         if (err < 0) {
608                 BT_ERR("Firmware loading failed");
609                 goto error;
610         }
611
612         /* Timeout before it is safe to send the first HCI packet */
613         msleep(1000);
614
615         /* Register HCI device */
616         err = hci_register_dev(hdev);
617         if (err < 0) {
618                 BT_ERR("Can't register HCI device");
619                 goto error;
620         }
621
622         return 0;
623
624 error:
625         info->hdev = NULL;
626         hci_free_dev(hdev);
627         return err;
628 }
629
630
631 static int bt3c_close(bt3c_info_t *info)
632 {
633         struct hci_dev *hdev = info->hdev;
634
635         if (!hdev)
636                 return -ENODEV;
637
638         bt3c_hci_close(hdev);
639
640         if (hci_unregister_dev(hdev) < 0)
641                 BT_ERR("Can't unregister HCI device %s", hdev->name);
642
643         hci_free_dev(hdev);
644
645         return 0;
646 }
647
648 static int bt3c_probe(struct pcmcia_device *link)
649 {
650         bt3c_info_t *info;
651
652         /* Create new info device */
653         info = kzalloc(sizeof(*info), GFP_KERNEL);
654         if (!info)
655                 return -ENOMEM;
656
657         info->p_dev = link;
658         link->priv = info;
659
660         link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
661         link->io.NumPorts1 = 8;
662         link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
663         link->irq.IRQInfo1 = IRQ_LEVEL_ID;
664
665         link->irq.Handler = bt3c_interrupt;
666         link->irq.Instance = info;
667
668         link->conf.Attributes = CONF_ENABLE_IRQ;
669         link->conf.IntType = INT_MEMORY_AND_IO;
670
671         link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
672         return bt3c_config(link);
673 }
674
675
676 static void bt3c_detach(struct pcmcia_device *link)
677 {
678         bt3c_info_t *info = link->priv;
679
680         if (link->state & DEV_CONFIG)
681                 bt3c_release(link);
682
683         kfree(info);
684 }
685
686 static int get_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
687 {
688         int i;
689
690         i = pcmcia_get_tuple_data(handle, tuple);
691         if (i != CS_SUCCESS)
692                 return i;
693
694         return pcmcia_parse_tuple(handle, tuple, parse);
695 }
696
697 static int first_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
698 {
699         if (pcmcia_get_first_tuple(handle, tuple) != CS_SUCCESS)
700                 return CS_NO_MORE_ITEMS;
701         return get_tuple(handle, tuple, parse);
702 }
703
704 static int next_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
705 {
706         if (pcmcia_get_next_tuple(handle, tuple) != CS_SUCCESS)
707                 return CS_NO_MORE_ITEMS;
708         return get_tuple(handle, tuple, parse);
709 }
710
711 static int bt3c_config(struct pcmcia_device *link)
712 {
713         static kio_addr_t base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
714         bt3c_info_t *info = link->priv;
715         tuple_t tuple;
716         u_short buf[256];
717         cisparse_t parse;
718         cistpl_cftable_entry_t *cf = &parse.cftable_entry;
719         int i, j, try, last_ret, last_fn;
720
721         tuple.TupleData = (cisdata_t *)buf;
722         tuple.TupleOffset = 0;
723         tuple.TupleDataMax = 255;
724         tuple.Attributes = 0;
725
726         /* Get configuration register information */
727         tuple.DesiredTuple = CISTPL_CONFIG;
728         last_ret = first_tuple(link, &tuple, &parse);
729         if (last_ret != CS_SUCCESS) {
730                 last_fn = ParseTuple;
731                 goto cs_failed;
732         }
733         link->conf.ConfigBase = parse.config.base;
734         link->conf.Present = parse.config.rmask[0];
735
736         /* Configure card */
737         link->state |= DEV_CONFIG;
738
739         /* First pass: look for a config entry that looks normal. */
740         tuple.TupleData = (cisdata_t *)buf;
741         tuple.TupleOffset = 0;
742         tuple.TupleDataMax = 255;
743         tuple.Attributes = 0;
744         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
745         /* Two tries: without IO aliases, then with aliases */
746         for (try = 0; try < 2; try++) {
747                 i = first_tuple(link, &tuple, &parse);
748                 while (i != CS_NO_MORE_ITEMS) {
749                         if (i != CS_SUCCESS)
750                                 goto next_entry;
751                         if (cf->vpp1.present & (1 << CISTPL_POWER_VNOM))
752                                 link->conf.Vpp = cf->vpp1.param[CISTPL_POWER_VNOM] / 10000;
753                         if ((cf->io.nwin > 0) && (cf->io.win[0].len == 8) && (cf->io.win[0].base != 0)) {
754                                 link->conf.ConfigIndex = cf->index;
755                                 link->io.BasePort1 = cf->io.win[0].base;
756                                 link->io.IOAddrLines = (try == 0) ? 16 : cf->io.flags & CISTPL_IO_LINES_MASK;
757                                 i = pcmcia_request_io(link, &link->io);
758                                 if (i == CS_SUCCESS)
759                                         goto found_port;
760                         }
761 next_entry:
762                         i = next_tuple(link, &tuple, &parse);
763                 }
764         }
765
766         /* Second pass: try to find an entry that isn't picky about
767            its base address, then try to grab any standard serial port
768            address, and finally try to get any free port. */
769         i = first_tuple(link, &tuple, &parse);
770         while (i != CS_NO_MORE_ITEMS) {
771                 if ((i == CS_SUCCESS) && (cf->io.nwin > 0) && ((cf->io.flags & CISTPL_IO_LINES_MASK) <= 3)) {
772                         link->conf.ConfigIndex = cf->index;
773                         for (j = 0; j < 5; j++) {
774                                 link->io.BasePort1 = base[j];
775                                 link->io.IOAddrLines = base[j] ? 16 : 3;
776                                 i = pcmcia_request_io(link, &link->io);
777                                 if (i == CS_SUCCESS)
778                                         goto found_port;
779                         }
780                 }
781                 i = next_tuple(link, &tuple, &parse);
782         }
783
784 found_port:
785         if (i != CS_SUCCESS) {
786                 BT_ERR("No usable port range found");
787                 cs_error(link, RequestIO, i);
788                 goto failed;
789         }
790
791         i = pcmcia_request_irq(link, &link->irq);
792         if (i != CS_SUCCESS) {
793                 cs_error(link, RequestIRQ, i);
794                 link->irq.AssignedIRQ = 0;
795         }
796
797         i = pcmcia_request_configuration(link, &link->conf);
798         if (i != CS_SUCCESS) {
799                 cs_error(link, RequestConfiguration, i);
800                 goto failed;
801         }
802
803         if (bt3c_open(info) != 0)
804                 goto failed;
805
806         strcpy(info->node.dev_name, info->hdev->name);
807         link->dev_node = &info->node;
808         link->state &= ~DEV_CONFIG_PENDING;
809
810         return 0;
811
812 cs_failed:
813         cs_error(link, last_fn, last_ret);
814
815 failed:
816         bt3c_release(link);
817         return -ENODEV;
818 }
819
820
821 static void bt3c_release(struct pcmcia_device *link)
822 {
823         bt3c_info_t *info = link->priv;
824
825         if (link->state & DEV_PRESENT)
826                 bt3c_close(info);
827
828         pcmcia_disable_device(link);
829 }
830
831
832 static struct pcmcia_device_id bt3c_ids[] = {
833         PCMCIA_DEVICE_PROD_ID13("3COM", "Bluetooth PC Card", 0xefce0a31, 0xd4ce9b02),
834         PCMCIA_DEVICE_NULL
835 };
836 MODULE_DEVICE_TABLE(pcmcia, bt3c_ids);
837
838 static struct pcmcia_driver bt3c_driver = {
839         .owner          = THIS_MODULE,
840         .drv            = {
841                 .name   = "bt3c_cs",
842         },
843         .probe          = bt3c_probe,
844         .remove         = bt3c_detach,
845         .id_table       = bt3c_ids,
846 };
847
848 static int __init init_bt3c_cs(void)
849 {
850         return pcmcia_register_driver(&bt3c_driver);
851 }
852
853
854 static void __exit exit_bt3c_cs(void)
855 {
856         pcmcia_unregister_driver(&bt3c_driver);
857 }
858
859 module_init(init_bt3c_cs);
860 module_exit(exit_bt3c_cs);