[PATCH] pcmcia: add pcmcia_disable_device
[linux-2.6.git] / drivers / bluetooth / btuart_cs.c
1 /*
2  *
3  *  Driver for Bluetooth PCMCIA cards with HCI UART interface
4  *
5  *  Copyright (C) 2001-2002  Marcel Holtmann <marcel@holtmann.org>
6  *
7  *
8  *  This program is free software; you can redistribute it and/or modify
9  *  it under the terms of the GNU General Public License version 2 as
10  *  published by the Free Software Foundation;
11  *
12  *  Software distributed under the License is distributed on an "AS
13  *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
14  *  implied. See the License for the specific language governing
15  *  rights and limitations under the License.
16  *
17  *  The initial developer of the original code is David A. Hinds
18  *  <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
19  *  are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
20  *
21  */
22
23 #include <linux/config.h>
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/sched.h>
31 #include <linux/delay.h>
32 #include <linux/errno.h>
33 #include <linux/ptrace.h>
34 #include <linux/ioport.h>
35 #include <linux/spinlock.h>
36 #include <linux/moduleparam.h>
37
38 #include <linux/skbuff.h>
39 #include <linux/string.h>
40 #include <linux/serial.h>
41 #include <linux/serial_reg.h>
42 #include <linux/bitops.h>
43 #include <asm/system.h>
44 #include <asm/io.h>
45
46 #include <pcmcia/cs_types.h>
47 #include <pcmcia/cs.h>
48 #include <pcmcia/cistpl.h>
49 #include <pcmcia/ciscode.h>
50 #include <pcmcia/ds.h>
51 #include <pcmcia/cisreg.h>
52
53 #include <net/bluetooth/bluetooth.h>
54 #include <net/bluetooth/hci_core.h>
55
56
57
58 /* ======================== Module parameters ======================== */
59
60
61 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
62 MODULE_DESCRIPTION("Bluetooth driver for Bluetooth PCMCIA cards with HCI UART interface");
63 MODULE_LICENSE("GPL");
64
65
66
67 /* ======================== Local structures ======================== */
68
69
70 typedef struct btuart_info_t {
71         dev_link_t link;
72         dev_node_t node;
73
74         struct hci_dev *hdev;
75
76         spinlock_t lock;        /* For serializing operations */
77
78         struct sk_buff_head txq;
79         unsigned long tx_state;
80
81         unsigned long rx_state;
82         unsigned long rx_count;
83         struct sk_buff *rx_skb;
84 } btuart_info_t;
85
86
87 static void btuart_config(dev_link_t *link);
88 static void btuart_release(dev_link_t *link);
89
90 static void btuart_detach(struct pcmcia_device *p_dev);
91
92
93 /* Maximum baud rate */
94 #define SPEED_MAX  115200
95
96 /* Default baud rate: 57600, 115200, 230400 or 460800 */
97 #define DEFAULT_BAUD_RATE  115200
98
99
100 /* Transmit states  */
101 #define XMIT_SENDING    1
102 #define XMIT_WAKEUP     2
103 #define XMIT_WAITING    8
104
105 /* Receiver states */
106 #define RECV_WAIT_PACKET_TYPE   0
107 #define RECV_WAIT_EVENT_HEADER  1
108 #define RECV_WAIT_ACL_HEADER    2
109 #define RECV_WAIT_SCO_HEADER    3
110 #define RECV_WAIT_DATA          4
111
112
113
114 /* ======================== Interrupt handling ======================== */
115
116
117 static int btuart_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
118 {
119         int actual = 0;
120
121         /* Tx FIFO should be empty */
122         if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
123                 return 0;
124
125         /* Fill FIFO with current frame */
126         while ((fifo_size-- > 0) && (actual < len)) {
127                 /* Transmit next byte */
128                 outb(buf[actual], iobase + UART_TX);
129                 actual++;
130         }
131
132         return actual;
133 }
134
135
136 static void btuart_write_wakeup(btuart_info_t *info)
137 {
138         if (!info) {
139                 BT_ERR("Unknown device");
140                 return;
141         }
142
143         if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
144                 set_bit(XMIT_WAKEUP, &(info->tx_state));
145                 return;
146         }
147
148         do {
149                 register unsigned int iobase = info->link.io.BasePort1;
150                 register struct sk_buff *skb;
151                 register int len;
152
153                 clear_bit(XMIT_WAKEUP, &(info->tx_state));
154
155                 if (!(info->link.state & DEV_PRESENT))
156                         return;
157
158                 if (!(skb = skb_dequeue(&(info->txq))))
159                         break;
160
161                 /* Send frame */
162                 len = btuart_write(iobase, 16, skb->data, skb->len);
163                 set_bit(XMIT_WAKEUP, &(info->tx_state));
164
165                 if (len == skb->len) {
166                         kfree_skb(skb);
167                 } else {
168                         skb_pull(skb, len);
169                         skb_queue_head(&(info->txq), skb);
170                 }
171
172                 info->hdev->stat.byte_tx += len;
173
174         } while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
175
176         clear_bit(XMIT_SENDING, &(info->tx_state));
177 }
178
179
180 static void btuart_receive(btuart_info_t *info)
181 {
182         unsigned int iobase;
183         int boguscount = 0;
184
185         if (!info) {
186                 BT_ERR("Unknown device");
187                 return;
188         }
189
190         iobase = info->link.io.BasePort1;
191
192         do {
193                 info->hdev->stat.byte_rx++;
194
195                 /* Allocate packet */
196                 if (info->rx_skb == NULL) {
197                         info->rx_state = RECV_WAIT_PACKET_TYPE;
198                         info->rx_count = 0;
199                         if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
200                                 BT_ERR("Can't allocate mem for new packet");
201                                 return;
202                         }
203                 }
204
205                 if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
206
207                         info->rx_skb->dev = (void *) info->hdev;
208                         bt_cb(info->rx_skb)->pkt_type = inb(iobase + UART_RX);
209
210                         switch (bt_cb(info->rx_skb)->pkt_type) {
211
212                         case HCI_EVENT_PKT:
213                                 info->rx_state = RECV_WAIT_EVENT_HEADER;
214                                 info->rx_count = HCI_EVENT_HDR_SIZE;
215                                 break;
216
217                         case HCI_ACLDATA_PKT:
218                                 info->rx_state = RECV_WAIT_ACL_HEADER;
219                                 info->rx_count = HCI_ACL_HDR_SIZE;
220                                 break;
221
222                         case HCI_SCODATA_PKT:
223                                 info->rx_state = RECV_WAIT_SCO_HEADER;
224                                 info->rx_count = HCI_SCO_HDR_SIZE;
225                                 break;
226
227                         default:
228                                 /* Unknown packet */
229                                 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
230                                 info->hdev->stat.err_rx++;
231                                 clear_bit(HCI_RUNNING, &(info->hdev->flags));
232
233                                 kfree_skb(info->rx_skb);
234                                 info->rx_skb = NULL;
235                                 break;
236
237                         }
238
239                 } else {
240
241                         *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
242                         info->rx_count--;
243
244                         if (info->rx_count == 0) {
245
246                                 int dlen;
247                                 struct hci_event_hdr *eh;
248                                 struct hci_acl_hdr *ah;
249                                 struct hci_sco_hdr *sh;
250
251
252                                 switch (info->rx_state) {
253
254                                 case RECV_WAIT_EVENT_HEADER:
255                                         eh = (struct hci_event_hdr *)(info->rx_skb->data);
256                                         info->rx_state = RECV_WAIT_DATA;
257                                         info->rx_count = eh->plen;
258                                         break;
259
260                                 case RECV_WAIT_ACL_HEADER:
261                                         ah = (struct hci_acl_hdr *)(info->rx_skb->data);
262                                         dlen = __le16_to_cpu(ah->dlen);
263                                         info->rx_state = RECV_WAIT_DATA;
264                                         info->rx_count = dlen;
265                                         break;
266
267                                 case RECV_WAIT_SCO_HEADER:
268                                         sh = (struct hci_sco_hdr *)(info->rx_skb->data);
269                                         info->rx_state = RECV_WAIT_DATA;
270                                         info->rx_count = sh->dlen;
271                                         break;
272
273                                 case RECV_WAIT_DATA:
274                                         hci_recv_frame(info->rx_skb);
275                                         info->rx_skb = NULL;
276                                         break;
277
278                                 }
279
280                         }
281
282                 }
283
284                 /* Make sure we don't stay here too long */
285                 if (boguscount++ > 16)
286                         break;
287
288         } while (inb(iobase + UART_LSR) & UART_LSR_DR);
289 }
290
291
292 static irqreturn_t btuart_interrupt(int irq, void *dev_inst, struct pt_regs *regs)
293 {
294         btuart_info_t *info = dev_inst;
295         unsigned int iobase;
296         int boguscount = 0;
297         int iir, lsr;
298
299         if (!info || !info->hdev) {
300                 BT_ERR("Call of irq %d for unknown device", irq);
301                 return IRQ_NONE;
302         }
303
304         iobase = info->link.io.BasePort1;
305
306         spin_lock(&(info->lock));
307
308         iir = inb(iobase + UART_IIR) & UART_IIR_ID;
309         while (iir) {
310
311                 /* Clear interrupt */
312                 lsr = inb(iobase + UART_LSR);
313
314                 switch (iir) {
315                 case UART_IIR_RLSI:
316                         BT_ERR("RLSI");
317                         break;
318                 case UART_IIR_RDI:
319                         /* Receive interrupt */
320                         btuart_receive(info);
321                         break;
322                 case UART_IIR_THRI:
323                         if (lsr & UART_LSR_THRE) {
324                                 /* Transmitter ready for data */
325                                 btuart_write_wakeup(info);
326                         }
327                         break;
328                 default:
329                         BT_ERR("Unhandled IIR=%#x", iir);
330                         break;
331                 }
332
333                 /* Make sure we don't stay here too long */
334                 if (boguscount++ > 100)
335                         break;
336
337                 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
338
339         }
340
341         spin_unlock(&(info->lock));
342
343         return IRQ_HANDLED;
344 }
345
346
347 static void btuart_change_speed(btuart_info_t *info, unsigned int speed)
348 {
349         unsigned long flags;
350         unsigned int iobase;
351         int fcr;                /* FIFO control reg */
352         int lcr;                /* Line control reg */
353         int divisor;
354
355         if (!info) {
356                 BT_ERR("Unknown device");
357                 return;
358         }
359
360         iobase = info->link.io.BasePort1;
361
362         spin_lock_irqsave(&(info->lock), flags);
363
364         /* Turn off interrupts */
365         outb(0, iobase + UART_IER);
366
367         divisor = SPEED_MAX / speed;
368
369         fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT;
370
371         /* 
372          * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
373          * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
374          * about this timeout since it will always be fast enough. 
375          */
376
377         if (speed < 38400)
378                 fcr |= UART_FCR_TRIGGER_1;
379         else
380                 fcr |= UART_FCR_TRIGGER_14;
381
382         /* Bluetooth cards use 8N1 */
383         lcr = UART_LCR_WLEN8;
384
385         outb(UART_LCR_DLAB | lcr, iobase + UART_LCR);   /* Set DLAB */
386         outb(divisor & 0xff, iobase + UART_DLL);        /* Set speed */
387         outb(divisor >> 8, iobase + UART_DLM);
388         outb(lcr, iobase + UART_LCR);   /* Set 8N1  */
389         outb(fcr, iobase + UART_FCR);   /* Enable FIFO's */
390
391         /* Turn on interrups */
392         outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
393
394         spin_unlock_irqrestore(&(info->lock), flags);
395 }
396
397
398
399 /* ======================== HCI interface ======================== */
400
401
402 static int btuart_hci_flush(struct hci_dev *hdev)
403 {
404         btuart_info_t *info = (btuart_info_t *)(hdev->driver_data);
405
406         /* Drop TX queue */
407         skb_queue_purge(&(info->txq));
408
409         return 0;
410 }
411
412
413 static int btuart_hci_open(struct hci_dev *hdev)
414 {
415         set_bit(HCI_RUNNING, &(hdev->flags));
416
417         return 0;
418 }
419
420
421 static int btuart_hci_close(struct hci_dev *hdev)
422 {
423         if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
424                 return 0;
425
426         btuart_hci_flush(hdev);
427
428         return 0;
429 }
430
431
432 static int btuart_hci_send_frame(struct sk_buff *skb)
433 {
434         btuart_info_t *info;
435         struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
436
437         if (!hdev) {
438                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
439                 return -ENODEV;
440         }
441
442         info = (btuart_info_t *)(hdev->driver_data);
443
444         switch (bt_cb(skb)->pkt_type) {
445         case HCI_COMMAND_PKT:
446                 hdev->stat.cmd_tx++;
447                 break;
448         case HCI_ACLDATA_PKT:
449                 hdev->stat.acl_tx++;
450                 break;
451         case HCI_SCODATA_PKT:
452                 hdev->stat.sco_tx++;
453                 break;
454         };
455
456         /* Prepend skb with frame type */
457         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
458         skb_queue_tail(&(info->txq), skb);
459
460         btuart_write_wakeup(info);
461
462         return 0;
463 }
464
465
466 static void btuart_hci_destruct(struct hci_dev *hdev)
467 {
468 }
469
470
471 static int btuart_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
472 {
473         return -ENOIOCTLCMD;
474 }
475
476
477
478 /* ======================== Card services HCI interaction ======================== */
479
480
481 static int btuart_open(btuart_info_t *info)
482 {
483         unsigned long flags;
484         unsigned int iobase = info->link.io.BasePort1;
485         struct hci_dev *hdev;
486
487         spin_lock_init(&(info->lock));
488
489         skb_queue_head_init(&(info->txq));
490
491         info->rx_state = RECV_WAIT_PACKET_TYPE;
492         info->rx_count = 0;
493         info->rx_skb = NULL;
494
495         /* Initialize HCI device */
496         hdev = hci_alloc_dev();
497         if (!hdev) {
498                 BT_ERR("Can't allocate HCI device");
499                 return -ENOMEM;
500         }
501
502         info->hdev = hdev;
503
504         hdev->type = HCI_PCCARD;
505         hdev->driver_data = info;
506
507         hdev->open     = btuart_hci_open;
508         hdev->close    = btuart_hci_close;
509         hdev->flush    = btuart_hci_flush;
510         hdev->send     = btuart_hci_send_frame;
511         hdev->destruct = btuart_hci_destruct;
512         hdev->ioctl    = btuart_hci_ioctl;
513
514         hdev->owner = THIS_MODULE;
515
516         spin_lock_irqsave(&(info->lock), flags);
517
518         /* Reset UART */
519         outb(0, iobase + UART_MCR);
520
521         /* Turn off interrupts */
522         outb(0, iobase + UART_IER);
523
524         /* Initialize UART */
525         outb(UART_LCR_WLEN8, iobase + UART_LCR);        /* Reset DLAB */
526         outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
527
528         /* Turn on interrupts */
529         // outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
530
531         spin_unlock_irqrestore(&(info->lock), flags);
532
533         btuart_change_speed(info, DEFAULT_BAUD_RATE);
534
535         /* Timeout before it is safe to send the first HCI packet */
536         msleep(1000);
537
538         /* Register HCI device */
539         if (hci_register_dev(hdev) < 0) {
540                 BT_ERR("Can't register HCI device");
541                 info->hdev = NULL;
542                 hci_free_dev(hdev);
543                 return -ENODEV;
544         }
545
546         return 0;
547 }
548
549
550 static int btuart_close(btuart_info_t *info)
551 {
552         unsigned long flags;
553         unsigned int iobase = info->link.io.BasePort1;
554         struct hci_dev *hdev = info->hdev;
555
556         if (!hdev)
557                 return -ENODEV;
558
559         btuart_hci_close(hdev);
560
561         spin_lock_irqsave(&(info->lock), flags);
562
563         /* Reset UART */
564         outb(0, iobase + UART_MCR);
565
566         /* Turn off interrupts */
567         outb(0, iobase + UART_IER);
568
569         spin_unlock_irqrestore(&(info->lock), flags);
570
571         if (hci_unregister_dev(hdev) < 0)
572                 BT_ERR("Can't unregister HCI device %s", hdev->name);
573
574         hci_free_dev(hdev);
575
576         return 0;
577 }
578
579 static int btuart_attach(struct pcmcia_device *p_dev)
580 {
581         btuart_info_t *info;
582         dev_link_t *link;
583
584         /* Create new info device */
585         info = kzalloc(sizeof(*info), GFP_KERNEL);
586         if (!info)
587                 return -ENOMEM;
588
589         link = &info->link;
590         link->priv = info;
591
592         link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
593         link->io.NumPorts1 = 8;
594         link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
595         link->irq.IRQInfo1 = IRQ_LEVEL_ID;
596
597         link->irq.Handler = btuart_interrupt;
598         link->irq.Instance = info;
599
600         link->conf.Attributes = CONF_ENABLE_IRQ;
601         link->conf.Vcc = 50;
602         link->conf.IntType = INT_MEMORY_AND_IO;
603
604         link->handle = p_dev;
605         p_dev->instance = link;
606
607         link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
608         btuart_config(link);
609
610         return 0;
611 }
612
613
614 static void btuart_detach(struct pcmcia_device *p_dev)
615 {
616         dev_link_t *link = dev_to_instance(p_dev);
617         btuart_info_t *info = link->priv;
618
619         if (link->state & DEV_CONFIG)
620                 btuart_release(link);
621
622         kfree(info);
623 }
624
625 static int get_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
626 {
627         int i;
628
629         i = pcmcia_get_tuple_data(handle, tuple);
630         if (i != CS_SUCCESS)
631                 return i;
632
633         return pcmcia_parse_tuple(handle, tuple, parse);
634 }
635
636 static int first_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
637 {
638         if (pcmcia_get_first_tuple(handle, tuple) != CS_SUCCESS)
639                 return CS_NO_MORE_ITEMS;
640         return get_tuple(handle, tuple, parse);
641 }
642
643 static int next_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
644 {
645         if (pcmcia_get_next_tuple(handle, tuple) != CS_SUCCESS)
646                 return CS_NO_MORE_ITEMS;
647         return get_tuple(handle, tuple, parse);
648 }
649
650 static void btuart_config(dev_link_t *link)
651 {
652         static kio_addr_t base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
653         client_handle_t handle = link->handle;
654         btuart_info_t *info = link->priv;
655         tuple_t tuple;
656         u_short buf[256];
657         cisparse_t parse;
658         cistpl_cftable_entry_t *cf = &parse.cftable_entry;
659         config_info_t config;
660         int i, j, try, last_ret, last_fn;
661
662         tuple.TupleData = (cisdata_t *)buf;
663         tuple.TupleOffset = 0;
664         tuple.TupleDataMax = 255;
665         tuple.Attributes = 0;
666
667         /* Get configuration register information */
668         tuple.DesiredTuple = CISTPL_CONFIG;
669         last_ret = first_tuple(handle, &tuple, &parse);
670         if (last_ret != CS_SUCCESS) {
671                 last_fn = ParseTuple;
672                 goto cs_failed;
673         }
674         link->conf.ConfigBase = parse.config.base;
675         link->conf.Present = parse.config.rmask[0];
676
677         /* Configure card */
678         link->state |= DEV_CONFIG;
679         i = pcmcia_get_configuration_info(handle, &config);
680         link->conf.Vcc = config.Vcc;
681
682         /* First pass: look for a config entry that looks normal. */
683         tuple.TupleData = (cisdata_t *) buf;
684         tuple.TupleOffset = 0;
685         tuple.TupleDataMax = 255;
686         tuple.Attributes = 0;
687         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
688         /* Two tries: without IO aliases, then with aliases */
689         for (try = 0; try < 2; try++) {
690                 i = first_tuple(handle, &tuple, &parse);
691                 while (i != CS_NO_MORE_ITEMS) {
692                         if (i != CS_SUCCESS)
693                                 goto next_entry;
694                         if (cf->vpp1.present & (1 << CISTPL_POWER_VNOM))
695                                 link->conf.Vpp1 = link->conf.Vpp2 = cf->vpp1.param[CISTPL_POWER_VNOM] / 10000;
696                         if ((cf->io.nwin > 0) && (cf->io.win[0].len == 8) && (cf->io.win[0].base != 0)) {
697                                 link->conf.ConfigIndex = cf->index;
698                                 link->io.BasePort1 = cf->io.win[0].base;
699                                 link->io.IOAddrLines = (try == 0) ? 16 : cf->io.flags & CISTPL_IO_LINES_MASK;
700                                 i = pcmcia_request_io(link->handle, &link->io);
701                                 if (i == CS_SUCCESS)
702                                         goto found_port;
703                         }
704 next_entry:
705                         i = next_tuple(handle, &tuple, &parse);
706                 }
707         }
708
709         /* Second pass: try to find an entry that isn't picky about
710            its base address, then try to grab any standard serial port
711            address, and finally try to get any free port. */
712         i = first_tuple(handle, &tuple, &parse);
713         while (i != CS_NO_MORE_ITEMS) {
714                 if ((i == CS_SUCCESS) && (cf->io.nwin > 0)
715                     && ((cf->io.flags & CISTPL_IO_LINES_MASK) <= 3)) {
716                         link->conf.ConfigIndex = cf->index;
717                         for (j = 0; j < 5; j++) {
718                                 link->io.BasePort1 = base[j];
719                                 link->io.IOAddrLines = base[j] ? 16 : 3;
720                                 i = pcmcia_request_io(link->handle, &link->io);
721                                 if (i == CS_SUCCESS)
722                                         goto found_port;
723                         }
724                 }
725                 i = next_tuple(handle, &tuple, &parse);
726         }
727
728 found_port:
729         if (i != CS_SUCCESS) {
730                 BT_ERR("No usable port range found");
731                 cs_error(link->handle, RequestIO, i);
732                 goto failed;
733         }
734
735         i = pcmcia_request_irq(link->handle, &link->irq);
736         if (i != CS_SUCCESS) {
737                 cs_error(link->handle, RequestIRQ, i);
738                 link->irq.AssignedIRQ = 0;
739         }
740
741         i = pcmcia_request_configuration(link->handle, &link->conf);
742         if (i != CS_SUCCESS) {
743                 cs_error(link->handle, RequestConfiguration, i);
744                 goto failed;
745         }
746
747         if (btuart_open(info) != 0)
748                 goto failed;
749
750         strcpy(info->node.dev_name, info->hdev->name);
751         link->dev = &info->node;
752         link->state &= ~DEV_CONFIG_PENDING;
753
754         return;
755
756 cs_failed:
757         cs_error(link->handle, last_fn, last_ret);
758
759 failed:
760         btuart_release(link);
761 }
762
763
764 static void btuart_release(dev_link_t *link)
765 {
766         btuart_info_t *info = link->priv;
767
768         if (link->state & DEV_PRESENT)
769                 btuart_close(info);
770
771         pcmcia_disable_device(link->handle);
772 }
773
774 static int btuart_suspend(struct pcmcia_device *dev)
775 {
776         dev_link_t *link = dev_to_instance(dev);
777
778         link->state |= DEV_SUSPEND;
779         if (link->state & DEV_CONFIG)
780                 pcmcia_release_configuration(link->handle);
781
782         return 0;
783 }
784
785 static int btuart_resume(struct pcmcia_device *dev)
786 {
787         dev_link_t *link = dev_to_instance(dev);
788
789         link->state &= ~DEV_SUSPEND;
790         if (DEV_OK(link))
791                 pcmcia_request_configuration(link->handle, &link->conf);
792
793         return 0;
794 }
795
796
797 static struct pcmcia_device_id btuart_ids[] = {
798         /* don't use this driver. Use serial_cs + hci_uart instead */
799         PCMCIA_DEVICE_NULL
800 };
801 MODULE_DEVICE_TABLE(pcmcia, btuart_ids);
802
803 static struct pcmcia_driver btuart_driver = {
804         .owner          = THIS_MODULE,
805         .drv            = {
806                 .name   = "btuart_cs",
807         },
808         .probe          = btuart_attach,
809         .remove         = btuart_detach,
810         .id_table       = btuart_ids,
811         .suspend        = btuart_suspend,
812         .resume         = btuart_resume,
813 };
814
815 static int __init init_btuart_cs(void)
816 {
817         return pcmcia_register_driver(&btuart_driver);
818 }
819
820
821 static void __exit exit_btuart_cs(void)
822 {
823         pcmcia_unregister_driver(&btuart_driver);
824 }
825
826 module_init(init_btuart_cs);
827 module_exit(exit_btuart_cs);