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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/module.h> | |
24 | ||
25 | #include <linux/kernel.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/types.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/errno.h> | |
31 | #include <linux/ptrace.h> | |
32 | #include <linux/ioport.h> | |
33 | #include <linux/spinlock.h> | |
34 | #include <linux/moduleparam.h> | |
35 | ||
36 | #include <linux/skbuff.h> | |
37 | #include <linux/string.h> | |
38 | #include <linux/serial.h> | |
39 | #include <linux/serial_reg.h> | |
40 | #include <linux/bitops.h> | |
41 | #include <linux/io.h> | |
42 | ||
43 | #include <pcmcia/cistpl.h> | |
44 | #include <pcmcia/ciscode.h> | |
45 | #include <pcmcia/ds.h> | |
46 | #include <pcmcia/cisreg.h> | |
47 | ||
48 | #include <net/bluetooth/bluetooth.h> | |
49 | #include <net/bluetooth/hci_core.h> | |
50 | ||
51 | ||
52 | ||
53 | /* ======================== Module parameters ======================== */ | |
54 | ||
55 | ||
56 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); | |
57 | MODULE_DESCRIPTION("Bluetooth driver for Bluetooth PCMCIA cards with HCI UART interface"); | |
58 | MODULE_LICENSE("GPL"); | |
59 | ||
60 | ||
61 | ||
62 | /* ======================== Local structures ======================== */ | |
63 | ||
64 | ||
65 | struct btuart_info { | |
66 | struct pcmcia_device *p_dev; | |
67 | ||
68 | struct hci_dev *hdev; | |
69 | ||
70 | spinlock_t lock; /* For serializing operations */ | |
71 | ||
72 | struct sk_buff_head txq; | |
73 | unsigned long tx_state; | |
74 | ||
75 | unsigned long rx_state; | |
76 | unsigned long rx_count; | |
77 | struct sk_buff *rx_skb; | |
78 | }; | |
79 | ||
80 | ||
81 | static int btuart_config(struct pcmcia_device *link); | |
82 | static void btuart_release(struct pcmcia_device *link); | |
83 | ||
84 | static void btuart_detach(struct pcmcia_device *p_dev); | |
85 | ||
86 | ||
87 | /* Maximum baud rate */ | |
88 | #define SPEED_MAX 115200 | |
89 | ||
90 | /* Default baud rate: 57600, 115200, 230400 or 460800 */ | |
91 | #define DEFAULT_BAUD_RATE 115200 | |
92 | ||
93 | ||
94 | /* Transmit states */ | |
95 | #define XMIT_SENDING 1 | |
96 | #define XMIT_WAKEUP 2 | |
97 | #define XMIT_WAITING 8 | |
98 | ||
99 | /* Receiver states */ | |
100 | #define RECV_WAIT_PACKET_TYPE 0 | |
101 | #define RECV_WAIT_EVENT_HEADER 1 | |
102 | #define RECV_WAIT_ACL_HEADER 2 | |
103 | #define RECV_WAIT_SCO_HEADER 3 | |
104 | #define RECV_WAIT_DATA 4 | |
105 | ||
106 | ||
107 | ||
108 | /* ======================== Interrupt handling ======================== */ | |
109 | ||
110 | ||
111 | static int btuart_write(unsigned int iobase, int fifo_size, __u8 *buf, int len) | |
112 | { | |
113 | int actual = 0; | |
114 | ||
115 | /* Tx FIFO should be empty */ | |
116 | if (!(inb(iobase + UART_LSR) & UART_LSR_THRE)) | |
117 | return 0; | |
118 | ||
119 | /* Fill FIFO with current frame */ | |
120 | while ((fifo_size-- > 0) && (actual < len)) { | |
121 | /* Transmit next byte */ | |
122 | outb(buf[actual], iobase + UART_TX); | |
123 | actual++; | |
124 | } | |
125 | ||
126 | return actual; | |
127 | } | |
128 | ||
129 | ||
130 | static void btuart_write_wakeup(struct btuart_info *info) | |
131 | { | |
132 | if (!info) { | |
133 | BT_ERR("Unknown device"); | |
134 | return; | |
135 | } | |
136 | ||
137 | if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) { | |
138 | set_bit(XMIT_WAKEUP, &(info->tx_state)); | |
139 | return; | |
140 | } | |
141 | ||
142 | do { | |
143 | unsigned int iobase = info->p_dev->resource[0]->start; | |
144 | register struct sk_buff *skb; | |
145 | int len; | |
146 | ||
147 | clear_bit(XMIT_WAKEUP, &(info->tx_state)); | |
148 | ||
149 | if (!pcmcia_dev_present(info->p_dev)) | |
150 | return; | |
151 | ||
152 | skb = skb_dequeue(&(info->txq)); | |
153 | if (!skb) | |
154 | break; | |
155 | ||
156 | /* Send frame */ | |
157 | len = btuart_write(iobase, 16, skb->data, skb->len); | |
158 | set_bit(XMIT_WAKEUP, &(info->tx_state)); | |
159 | ||
160 | if (len == skb->len) { | |
161 | kfree_skb(skb); | |
162 | } else { | |
163 | skb_pull(skb, len); | |
164 | skb_queue_head(&(info->txq), skb); | |
165 | } | |
166 | ||
167 | info->hdev->stat.byte_tx += len; | |
168 | ||
169 | } while (test_bit(XMIT_WAKEUP, &(info->tx_state))); | |
170 | ||
171 | clear_bit(XMIT_SENDING, &(info->tx_state)); | |
172 | } | |
173 | ||
174 | ||
175 | static void btuart_receive(struct btuart_info *info) | |
176 | { | |
177 | unsigned int iobase; | |
178 | int boguscount = 0; | |
179 | ||
180 | if (!info) { | |
181 | BT_ERR("Unknown device"); | |
182 | return; | |
183 | } | |
184 | ||
185 | iobase = info->p_dev->resource[0]->start; | |
186 | ||
187 | do { | |
188 | info->hdev->stat.byte_rx++; | |
189 | ||
190 | /* Allocate packet */ | |
191 | if (!info->rx_skb) { | |
192 | info->rx_state = RECV_WAIT_PACKET_TYPE; | |
193 | info->rx_count = 0; | |
194 | info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC); | |
195 | if (!info->rx_skb) { | |
196 | BT_ERR("Can't allocate mem for new packet"); | |
197 | return; | |
198 | } | |
199 | } | |
200 | ||
201 | if (info->rx_state == RECV_WAIT_PACKET_TYPE) { | |
202 | ||
203 | hci_skb_pkt_type(info->rx_skb) = inb(iobase + UART_RX); | |
204 | ||
205 | switch (hci_skb_pkt_type(info->rx_skb)) { | |
206 | ||
207 | case HCI_EVENT_PKT: | |
208 | info->rx_state = RECV_WAIT_EVENT_HEADER; | |
209 | info->rx_count = HCI_EVENT_HDR_SIZE; | |
210 | break; | |
211 | ||
212 | case HCI_ACLDATA_PKT: | |
213 | info->rx_state = RECV_WAIT_ACL_HEADER; | |
214 | info->rx_count = HCI_ACL_HDR_SIZE; | |
215 | break; | |
216 | ||
217 | case HCI_SCODATA_PKT: | |
218 | info->rx_state = RECV_WAIT_SCO_HEADER; | |
219 | info->rx_count = HCI_SCO_HDR_SIZE; | |
220 | break; | |
221 | ||
222 | default: | |
223 | /* Unknown packet */ | |
224 | BT_ERR("Unknown HCI packet with type 0x%02x received", | |
225 | hci_skb_pkt_type(info->rx_skb)); | |
226 | info->hdev->stat.err_rx++; | |
227 | ||
228 | kfree_skb(info->rx_skb); | |
229 | info->rx_skb = NULL; | |
230 | break; | |
231 | ||
232 | } | |
233 | ||
234 | } else { | |
235 | ||
236 | skb_put_u8(info->rx_skb, inb(iobase + UART_RX)); | |
237 | info->rx_count--; | |
238 | ||
239 | if (info->rx_count == 0) { | |
240 | ||
241 | int dlen; | |
242 | struct hci_event_hdr *eh; | |
243 | struct hci_acl_hdr *ah; | |
244 | struct hci_sco_hdr *sh; | |
245 | ||
246 | ||
247 | switch (info->rx_state) { | |
248 | ||
249 | case RECV_WAIT_EVENT_HEADER: | |
250 | eh = hci_event_hdr(info->rx_skb); | |
251 | info->rx_state = RECV_WAIT_DATA; | |
252 | info->rx_count = eh->plen; | |
253 | break; | |
254 | ||
255 | case RECV_WAIT_ACL_HEADER: | |
256 | ah = hci_acl_hdr(info->rx_skb); | |
257 | dlen = __le16_to_cpu(ah->dlen); | |
258 | info->rx_state = RECV_WAIT_DATA; | |
259 | info->rx_count = dlen; | |
260 | break; | |
261 | ||
262 | case RECV_WAIT_SCO_HEADER: | |
263 | sh = hci_sco_hdr(info->rx_skb); | |
264 | info->rx_state = RECV_WAIT_DATA; | |
265 | info->rx_count = sh->dlen; | |
266 | break; | |
267 | ||
268 | case RECV_WAIT_DATA: | |
269 | hci_recv_frame(info->hdev, info->rx_skb); | |
270 | info->rx_skb = NULL; | |
271 | break; | |
272 | ||
273 | } | |
274 | ||
275 | } | |
276 | ||
277 | } | |
278 | ||
279 | /* Make sure we don't stay here too long */ | |
280 | if (boguscount++ > 16) | |
281 | break; | |
282 | ||
283 | } while (inb(iobase + UART_LSR) & UART_LSR_DR); | |
284 | } | |
285 | ||
286 | ||
287 | static irqreturn_t btuart_interrupt(int irq, void *dev_inst) | |
288 | { | |
289 | struct btuart_info *info = dev_inst; | |
290 | unsigned int iobase; | |
291 | int boguscount = 0; | |
292 | int iir, lsr; | |
293 | irqreturn_t r = IRQ_NONE; | |
294 | ||
295 | if (!info || !info->hdev) | |
296 | /* our irq handler is shared */ | |
297 | return IRQ_NONE; | |
298 | ||
299 | iobase = info->p_dev->resource[0]->start; | |
300 | ||
301 | spin_lock(&(info->lock)); | |
302 | ||
303 | iir = inb(iobase + UART_IIR) & UART_IIR_ID; | |
304 | while (iir) { | |
305 | r = IRQ_HANDLED; | |
306 | ||
307 | /* Clear interrupt */ | |
308 | lsr = inb(iobase + UART_LSR); | |
309 | ||
310 | switch (iir) { | |
311 | case UART_IIR_RLSI: | |
312 | BT_ERR("RLSI"); | |
313 | break; | |
314 | case UART_IIR_RDI: | |
315 | /* Receive interrupt */ | |
316 | btuart_receive(info); | |
317 | break; | |
318 | case UART_IIR_THRI: | |
319 | if (lsr & UART_LSR_THRE) { | |
320 | /* Transmitter ready for data */ | |
321 | btuart_write_wakeup(info); | |
322 | } | |
323 | break; | |
324 | default: | |
325 | BT_ERR("Unhandled IIR=%#x", iir); | |
326 | break; | |
327 | } | |
328 | ||
329 | /* Make sure we don't stay here too long */ | |
330 | if (boguscount++ > 100) | |
331 | break; | |
332 | ||
333 | iir = inb(iobase + UART_IIR) & UART_IIR_ID; | |
334 | ||
335 | } | |
336 | ||
337 | spin_unlock(&(info->lock)); | |
338 | ||
339 | return r; | |
340 | } | |
341 | ||
342 | ||
343 | static void btuart_change_speed(struct btuart_info *info, | |
344 | unsigned int speed) | |
345 | { | |
346 | unsigned long flags; | |
347 | unsigned int iobase; | |
348 | int fcr; /* FIFO control reg */ | |
349 | int lcr; /* Line control reg */ | |
350 | int divisor; | |
351 | ||
352 | if (!info) { | |
353 | BT_ERR("Unknown device"); | |
354 | return; | |
355 | } | |
356 | ||
357 | iobase = info->p_dev->resource[0]->start; | |
358 | ||
359 | spin_lock_irqsave(&(info->lock), flags); | |
360 | ||
361 | /* Turn off interrupts */ | |
362 | outb(0, iobase + UART_IER); | |
363 | ||
364 | divisor = SPEED_MAX / speed; | |
365 | ||
366 | fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT; | |
367 | ||
368 | /* | |
369 | * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and | |
370 | * almost 1,7 ms at 19200 bps. At speeds above that we can just forget | |
371 | * about this timeout since it will always be fast enough. | |
372 | */ | |
373 | ||
374 | if (speed < 38400) | |
375 | fcr |= UART_FCR_TRIGGER_1; | |
376 | else | |
377 | fcr |= UART_FCR_TRIGGER_14; | |
378 | ||
379 | /* Bluetooth cards use 8N1 */ | |
380 | lcr = UART_LCR_WLEN8; | |
381 | ||
382 | outb(UART_LCR_DLAB | lcr, iobase + UART_LCR); /* Set DLAB */ | |
383 | outb(divisor & 0xff, iobase + UART_DLL); /* Set speed */ | |
384 | outb(divisor >> 8, iobase + UART_DLM); | |
385 | outb(lcr, iobase + UART_LCR); /* Set 8N1 */ | |
386 | outb(fcr, iobase + UART_FCR); /* Enable FIFO's */ | |
387 | ||
388 | /* Turn on interrupts */ | |
389 | outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER); | |
390 | ||
391 | spin_unlock_irqrestore(&(info->lock), flags); | |
392 | } | |
393 | ||
394 | ||
395 | ||
396 | /* ======================== HCI interface ======================== */ | |
397 | ||
398 | ||
399 | static int btuart_hci_flush(struct hci_dev *hdev) | |
400 | { | |
401 | struct btuart_info *info = hci_get_drvdata(hdev); | |
402 | ||
403 | /* Drop TX queue */ | |
404 | skb_queue_purge(&(info->txq)); | |
405 | ||
406 | return 0; | |
407 | } | |
408 | ||
409 | ||
410 | static int btuart_hci_open(struct hci_dev *hdev) | |
411 | { | |
412 | return 0; | |
413 | } | |
414 | ||
415 | ||
416 | static int btuart_hci_close(struct hci_dev *hdev) | |
417 | { | |
418 | btuart_hci_flush(hdev); | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
423 | ||
424 | static int btuart_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb) | |
425 | { | |
426 | struct btuart_info *info = hci_get_drvdata(hdev); | |
427 | ||
428 | switch (hci_skb_pkt_type(skb)) { | |
429 | case HCI_COMMAND_PKT: | |
430 | hdev->stat.cmd_tx++; | |
431 | break; | |
432 | case HCI_ACLDATA_PKT: | |
433 | hdev->stat.acl_tx++; | |
434 | break; | |
435 | case HCI_SCODATA_PKT: | |
436 | hdev->stat.sco_tx++; | |
437 | break; | |
438 | } | |
439 | ||
440 | /* Prepend skb with frame type */ | |
441 | memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); | |
442 | skb_queue_tail(&(info->txq), skb); | |
443 | ||
444 | btuart_write_wakeup(info); | |
445 | ||
446 | return 0; | |
447 | } | |
448 | ||
449 | ||
450 | ||
451 | /* ======================== Card services HCI interaction ======================== */ | |
452 | ||
453 | ||
454 | static int btuart_open(struct btuart_info *info) | |
455 | { | |
456 | unsigned long flags; | |
457 | unsigned int iobase = info->p_dev->resource[0]->start; | |
458 | struct hci_dev *hdev; | |
459 | ||
460 | spin_lock_init(&(info->lock)); | |
461 | ||
462 | skb_queue_head_init(&(info->txq)); | |
463 | ||
464 | info->rx_state = RECV_WAIT_PACKET_TYPE; | |
465 | info->rx_count = 0; | |
466 | info->rx_skb = NULL; | |
467 | ||
468 | /* Initialize HCI device */ | |
469 | hdev = hci_alloc_dev(); | |
470 | if (!hdev) { | |
471 | BT_ERR("Can't allocate HCI device"); | |
472 | return -ENOMEM; | |
473 | } | |
474 | ||
475 | info->hdev = hdev; | |
476 | ||
477 | hdev->bus = HCI_PCCARD; | |
478 | hci_set_drvdata(hdev, info); | |
479 | SET_HCIDEV_DEV(hdev, &info->p_dev->dev); | |
480 | ||
481 | hdev->open = btuart_hci_open; | |
482 | hdev->close = btuart_hci_close; | |
483 | hdev->flush = btuart_hci_flush; | |
484 | hdev->send = btuart_hci_send_frame; | |
485 | ||
486 | spin_lock_irqsave(&(info->lock), flags); | |
487 | ||
488 | /* Reset UART */ | |
489 | outb(0, iobase + UART_MCR); | |
490 | ||
491 | /* Turn off interrupts */ | |
492 | outb(0, iobase + UART_IER); | |
493 | ||
494 | /* Initialize UART */ | |
495 | outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */ | |
496 | outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR); | |
497 | ||
498 | /* Turn on interrupts */ | |
499 | // outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER); | |
500 | ||
501 | spin_unlock_irqrestore(&(info->lock), flags); | |
502 | ||
503 | btuart_change_speed(info, DEFAULT_BAUD_RATE); | |
504 | ||
505 | /* Timeout before it is safe to send the first HCI packet */ | |
506 | msleep(1000); | |
507 | ||
508 | /* Register HCI device */ | |
509 | if (hci_register_dev(hdev) < 0) { | |
510 | BT_ERR("Can't register HCI device"); | |
511 | info->hdev = NULL; | |
512 | hci_free_dev(hdev); | |
513 | return -ENODEV; | |
514 | } | |
515 | ||
516 | return 0; | |
517 | } | |
518 | ||
519 | ||
520 | static int btuart_close(struct btuart_info *info) | |
521 | { | |
522 | unsigned long flags; | |
523 | unsigned int iobase = info->p_dev->resource[0]->start; | |
524 | struct hci_dev *hdev = info->hdev; | |
525 | ||
526 | if (!hdev) | |
527 | return -ENODEV; | |
528 | ||
529 | btuart_hci_close(hdev); | |
530 | ||
531 | spin_lock_irqsave(&(info->lock), flags); | |
532 | ||
533 | /* Reset UART */ | |
534 | outb(0, iobase + UART_MCR); | |
535 | ||
536 | /* Turn off interrupts */ | |
537 | outb(0, iobase + UART_IER); | |
538 | ||
539 | spin_unlock_irqrestore(&(info->lock), flags); | |
540 | ||
541 | hci_unregister_dev(hdev); | |
542 | hci_free_dev(hdev); | |
543 | ||
544 | return 0; | |
545 | } | |
546 | ||
547 | static int btuart_probe(struct pcmcia_device *link) | |
548 | { | |
549 | struct btuart_info *info; | |
550 | ||
551 | /* Create new info device */ | |
552 | info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL); | |
553 | if (!info) | |
554 | return -ENOMEM; | |
555 | ||
556 | info->p_dev = link; | |
557 | link->priv = info; | |
558 | ||
559 | link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_VPP | | |
560 | CONF_AUTO_SET_IO; | |
561 | ||
562 | return btuart_config(link); | |
563 | } | |
564 | ||
565 | ||
566 | static void btuart_detach(struct pcmcia_device *link) | |
567 | { | |
568 | btuart_release(link); | |
569 | } | |
570 | ||
571 | static int btuart_check_config(struct pcmcia_device *p_dev, void *priv_data) | |
572 | { | |
573 | int *try = priv_data; | |
574 | ||
575 | if (!try) | |
576 | p_dev->io_lines = 16; | |
577 | ||
578 | if ((p_dev->resource[0]->end != 8) || (p_dev->resource[0]->start == 0)) | |
579 | return -EINVAL; | |
580 | ||
581 | p_dev->resource[0]->end = 8; | |
582 | p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; | |
583 | p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; | |
584 | ||
585 | return pcmcia_request_io(p_dev); | |
586 | } | |
587 | ||
588 | static int btuart_check_config_notpicky(struct pcmcia_device *p_dev, | |
589 | void *priv_data) | |
590 | { | |
591 | static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 }; | |
592 | int j; | |
593 | ||
594 | if (p_dev->io_lines > 3) | |
595 | return -ENODEV; | |
596 | ||
597 | p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; | |
598 | p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; | |
599 | p_dev->resource[0]->end = 8; | |
600 | ||
601 | for (j = 0; j < 5; j++) { | |
602 | p_dev->resource[0]->start = base[j]; | |
603 | p_dev->io_lines = base[j] ? 16 : 3; | |
604 | if (!pcmcia_request_io(p_dev)) | |
605 | return 0; | |
606 | } | |
607 | return -ENODEV; | |
608 | } | |
609 | ||
610 | static int btuart_config(struct pcmcia_device *link) | |
611 | { | |
612 | struct btuart_info *info = link->priv; | |
613 | int i; | |
614 | int try; | |
615 | ||
616 | /* First pass: look for a config entry that looks normal. | |
617 | * Two tries: without IO aliases, then with aliases | |
618 | */ | |
619 | for (try = 0; try < 2; try++) | |
620 | if (!pcmcia_loop_config(link, btuart_check_config, &try)) | |
621 | goto found_port; | |
622 | ||
623 | /* Second pass: try to find an entry that isn't picky about | |
624 | * its base address, then try to grab any standard serial port | |
625 | * address, and finally try to get any free port. | |
626 | */ | |
627 | if (!pcmcia_loop_config(link, btuart_check_config_notpicky, NULL)) | |
628 | goto found_port; | |
629 | ||
630 | BT_ERR("No usable port range found"); | |
631 | goto failed; | |
632 | ||
633 | found_port: | |
634 | i = pcmcia_request_irq(link, btuart_interrupt); | |
635 | if (i != 0) | |
636 | goto failed; | |
637 | ||
638 | i = pcmcia_enable_device(link); | |
639 | if (i != 0) | |
640 | goto failed; | |
641 | ||
642 | if (btuart_open(info) != 0) | |
643 | goto failed; | |
644 | ||
645 | return 0; | |
646 | ||
647 | failed: | |
648 | btuart_release(link); | |
649 | return -ENODEV; | |
650 | } | |
651 | ||
652 | ||
653 | static void btuart_release(struct pcmcia_device *link) | |
654 | { | |
655 | struct btuart_info *info = link->priv; | |
656 | ||
657 | btuart_close(info); | |
658 | ||
659 | pcmcia_disable_device(link); | |
660 | } | |
661 | ||
662 | static const struct pcmcia_device_id btuart_ids[] = { | |
663 | /* don't use this driver. Use serial_cs + hci_uart instead */ | |
664 | PCMCIA_DEVICE_NULL | |
665 | }; | |
666 | MODULE_DEVICE_TABLE(pcmcia, btuart_ids); | |
667 | ||
668 | static struct pcmcia_driver btuart_driver = { | |
669 | .owner = THIS_MODULE, | |
670 | .name = "btuart_cs", | |
671 | .probe = btuart_probe, | |
672 | .remove = btuart_detach, | |
673 | .id_table = btuart_ids, | |
674 | }; | |
675 | module_pcmcia_driver(btuart_driver); |