Commit | Line | Data |
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1da177e4 LT |
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 | ||
1da177e4 LT |
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> | |
1da177e4 LT |
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> | |
239ede3c | 41 | #include <linux/io.h> |
1da177e4 | 42 | |
1da177e4 LT |
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 | ||
ad709d48 | 65 | struct btuart_info { |
fd238232 | 66 | struct pcmcia_device *p_dev; |
1da177e4 LT |
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; | |
ad709d48 | 78 | }; |
1da177e4 LT |
79 | |
80 | ||
15b99ac1 | 81 | static int btuart_config(struct pcmcia_device *link); |
fba395ee | 82 | static void btuart_release(struct pcmcia_device *link); |
1da177e4 | 83 | |
cc3b4866 | 84 | static void btuart_detach(struct pcmcia_device *p_dev); |
1da177e4 | 85 | |
1da177e4 LT |
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 | ||
ad709d48 | 130 | static void btuart_write_wakeup(struct btuart_info *info) |
1da177e4 LT |
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 { | |
fc5fef61 | 143 | unsigned int iobase = info->p_dev->resource[0]->start; |
1da177e4 | 144 | register struct sk_buff *skb; |
fc5fef61 | 145 | int len; |
1da177e4 LT |
146 | |
147 | clear_bit(XMIT_WAKEUP, &(info->tx_state)); | |
148 | ||
e2d40963 | 149 | if (!pcmcia_dev_present(info->p_dev)) |
1da177e4 LT |
150 | return; |
151 | ||
a08b15e6 VI |
152 | skb = skb_dequeue(&(info->txq)); |
153 | if (!skb) | |
1da177e4 LT |
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 | ||
ad709d48 | 175 | static void btuart_receive(struct btuart_info *info) |
1da177e4 LT |
176 | { |
177 | unsigned int iobase; | |
178 | int boguscount = 0; | |
179 | ||
180 | if (!info) { | |
181 | BT_ERR("Unknown device"); | |
182 | return; | |
183 | } | |
184 | ||
9a017a91 | 185 | iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
186 | |
187 | do { | |
188 | info->hdev->stat.byte_rx++; | |
189 | ||
190 | /* Allocate packet */ | |
05bd7762 | 191 | if (!info->rx_skb) { |
1da177e4 LT |
192 | info->rx_state = RECV_WAIT_PACKET_TYPE; |
193 | info->rx_count = 0; | |
a08b15e6 VI |
194 | info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC); |
195 | if (!info->rx_skb) { | |
1da177e4 LT |
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 | ||
0d48d939 | 203 | bt_cb(info->rx_skb)->pkt_type = inb(iobase + UART_RX); |
1da177e4 | 204 | |
0d48d939 | 205 | switch (bt_cb(info->rx_skb)->pkt_type) { |
1da177e4 LT |
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 */ | |
0d48d939 | 224 | BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type); |
1da177e4 | 225 | info->hdev->stat.err_rx++; |
1da177e4 LT |
226 | |
227 | kfree_skb(info->rx_skb); | |
228 | info->rx_skb = NULL; | |
229 | break; | |
230 | ||
231 | } | |
232 | ||
233 | } else { | |
234 | ||
235 | *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX); | |
236 | info->rx_count--; | |
237 | ||
238 | if (info->rx_count == 0) { | |
239 | ||
240 | int dlen; | |
241 | struct hci_event_hdr *eh; | |
242 | struct hci_acl_hdr *ah; | |
243 | struct hci_sco_hdr *sh; | |
244 | ||
245 | ||
246 | switch (info->rx_state) { | |
247 | ||
248 | case RECV_WAIT_EVENT_HEADER: | |
2a123b86 | 249 | eh = hci_event_hdr(info->rx_skb); |
1da177e4 LT |
250 | info->rx_state = RECV_WAIT_DATA; |
251 | info->rx_count = eh->plen; | |
252 | break; | |
253 | ||
254 | case RECV_WAIT_ACL_HEADER: | |
2a123b86 | 255 | ah = hci_acl_hdr(info->rx_skb); |
1da177e4 LT |
256 | dlen = __le16_to_cpu(ah->dlen); |
257 | info->rx_state = RECV_WAIT_DATA; | |
258 | info->rx_count = dlen; | |
259 | break; | |
260 | ||
261 | case RECV_WAIT_SCO_HEADER: | |
2a123b86 | 262 | sh = hci_sco_hdr(info->rx_skb); |
1da177e4 LT |
263 | info->rx_state = RECV_WAIT_DATA; |
264 | info->rx_count = sh->dlen; | |
265 | break; | |
266 | ||
267 | case RECV_WAIT_DATA: | |
e1a26170 | 268 | hci_recv_frame(info->hdev, info->rx_skb); |
1da177e4 LT |
269 | info->rx_skb = NULL; |
270 | break; | |
271 | ||
272 | } | |
273 | ||
274 | } | |
275 | ||
276 | } | |
277 | ||
278 | /* Make sure we don't stay here too long */ | |
279 | if (boguscount++ > 16) | |
280 | break; | |
281 | ||
282 | } while (inb(iobase + UART_LSR) & UART_LSR_DR); | |
283 | } | |
284 | ||
285 | ||
7d12e780 | 286 | static irqreturn_t btuart_interrupt(int irq, void *dev_inst) |
1da177e4 | 287 | { |
ad709d48 | 288 | struct btuart_info *info = dev_inst; |
1da177e4 LT |
289 | unsigned int iobase; |
290 | int boguscount = 0; | |
291 | int iir, lsr; | |
aafcf998 | 292 | irqreturn_t r = IRQ_NONE; |
1da177e4 | 293 | |
7427847d MF |
294 | if (!info || !info->hdev) |
295 | /* our irq handler is shared */ | |
296 | return IRQ_NONE; | |
1da177e4 | 297 | |
9a017a91 | 298 | iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
299 | |
300 | spin_lock(&(info->lock)); | |
301 | ||
302 | iir = inb(iobase + UART_IIR) & UART_IIR_ID; | |
303 | while (iir) { | |
aafcf998 | 304 | r = IRQ_HANDLED; |
1da177e4 LT |
305 | |
306 | /* Clear interrupt */ | |
307 | lsr = inb(iobase + UART_LSR); | |
308 | ||
309 | switch (iir) { | |
310 | case UART_IIR_RLSI: | |
311 | BT_ERR("RLSI"); | |
312 | break; | |
313 | case UART_IIR_RDI: | |
314 | /* Receive interrupt */ | |
315 | btuart_receive(info); | |
316 | break; | |
317 | case UART_IIR_THRI: | |
318 | if (lsr & UART_LSR_THRE) { | |
319 | /* Transmitter ready for data */ | |
320 | btuart_write_wakeup(info); | |
321 | } | |
322 | break; | |
323 | default: | |
324 | BT_ERR("Unhandled IIR=%#x", iir); | |
325 | break; | |
326 | } | |
327 | ||
328 | /* Make sure we don't stay here too long */ | |
329 | if (boguscount++ > 100) | |
330 | break; | |
331 | ||
332 | iir = inb(iobase + UART_IIR) & UART_IIR_ID; | |
333 | ||
334 | } | |
335 | ||
336 | spin_unlock(&(info->lock)); | |
337 | ||
aafcf998 | 338 | return r; |
1da177e4 LT |
339 | } |
340 | ||
341 | ||
ad709d48 HS |
342 | static void btuart_change_speed(struct btuart_info *info, |
343 | unsigned int speed) | |
1da177e4 LT |
344 | { |
345 | unsigned long flags; | |
346 | unsigned int iobase; | |
347 | int fcr; /* FIFO control reg */ | |
348 | int lcr; /* Line control reg */ | |
349 | int divisor; | |
350 | ||
351 | if (!info) { | |
352 | BT_ERR("Unknown device"); | |
353 | return; | |
354 | } | |
355 | ||
9a017a91 | 356 | iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
357 | |
358 | spin_lock_irqsave(&(info->lock), flags); | |
359 | ||
360 | /* Turn off interrupts */ | |
361 | outb(0, iobase + UART_IER); | |
362 | ||
363 | divisor = SPEED_MAX / speed; | |
364 | ||
365 | fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT; | |
366 | ||
367 | /* | |
368 | * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and | |
369 | * almost 1,7 ms at 19200 bps. At speeds above that we can just forget | |
370 | * about this timeout since it will always be fast enough. | |
371 | */ | |
372 | ||
373 | if (speed < 38400) | |
374 | fcr |= UART_FCR_TRIGGER_1; | |
375 | else | |
376 | fcr |= UART_FCR_TRIGGER_14; | |
377 | ||
378 | /* Bluetooth cards use 8N1 */ | |
379 | lcr = UART_LCR_WLEN8; | |
380 | ||
381 | outb(UART_LCR_DLAB | lcr, iobase + UART_LCR); /* Set DLAB */ | |
382 | outb(divisor & 0xff, iobase + UART_DLL); /* Set speed */ | |
383 | outb(divisor >> 8, iobase + UART_DLM); | |
384 | outb(lcr, iobase + UART_LCR); /* Set 8N1 */ | |
385 | outb(fcr, iobase + UART_FCR); /* Enable FIFO's */ | |
386 | ||
b92b1c57 | 387 | /* Turn on interrupts */ |
1da177e4 LT |
388 | outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER); |
389 | ||
390 | spin_unlock_irqrestore(&(info->lock), flags); | |
391 | } | |
392 | ||
393 | ||
394 | ||
395 | /* ======================== HCI interface ======================== */ | |
396 | ||
397 | ||
398 | static int btuart_hci_flush(struct hci_dev *hdev) | |
399 | { | |
ad709d48 | 400 | struct btuart_info *info = hci_get_drvdata(hdev); |
1da177e4 LT |
401 | |
402 | /* Drop TX queue */ | |
403 | skb_queue_purge(&(info->txq)); | |
404 | ||
405 | return 0; | |
406 | } | |
407 | ||
408 | ||
409 | static int btuart_hci_open(struct hci_dev *hdev) | |
410 | { | |
1da177e4 LT |
411 | return 0; |
412 | } | |
413 | ||
414 | ||
415 | static int btuart_hci_close(struct hci_dev *hdev) | |
416 | { | |
1da177e4 LT |
417 | btuart_hci_flush(hdev); |
418 | ||
419 | return 0; | |
420 | } | |
421 | ||
422 | ||
7bd8f09f | 423 | static int btuart_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb) |
1da177e4 | 424 | { |
ad709d48 | 425 | struct btuart_info *info = hci_get_drvdata(hdev); |
1da177e4 | 426 | |
0d48d939 | 427 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
428 | case HCI_COMMAND_PKT: |
429 | hdev->stat.cmd_tx++; | |
430 | break; | |
431 | case HCI_ACLDATA_PKT: | |
432 | hdev->stat.acl_tx++; | |
433 | break; | |
434 | case HCI_SCODATA_PKT: | |
435 | hdev->stat.sco_tx++; | |
436 | break; | |
5ad77795 | 437 | } |
1da177e4 LT |
438 | |
439 | /* Prepend skb with frame type */ | |
0d48d939 | 440 | memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1); |
1da177e4 LT |
441 | skb_queue_tail(&(info->txq), skb); |
442 | ||
443 | btuart_write_wakeup(info); | |
444 | ||
445 | return 0; | |
446 | } | |
447 | ||
448 | ||
1da177e4 LT |
449 | |
450 | /* ======================== Card services HCI interaction ======================== */ | |
451 | ||
452 | ||
ad709d48 | 453 | static int btuart_open(struct btuart_info *info) |
1da177e4 LT |
454 | { |
455 | unsigned long flags; | |
9a017a91 | 456 | unsigned int iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
457 | struct hci_dev *hdev; |
458 | ||
459 | spin_lock_init(&(info->lock)); | |
460 | ||
461 | skb_queue_head_init(&(info->txq)); | |
462 | ||
463 | info->rx_state = RECV_WAIT_PACKET_TYPE; | |
464 | info->rx_count = 0; | |
465 | info->rx_skb = NULL; | |
466 | ||
467 | /* Initialize HCI device */ | |
468 | hdev = hci_alloc_dev(); | |
469 | if (!hdev) { | |
470 | BT_ERR("Can't allocate HCI device"); | |
471 | return -ENOMEM; | |
472 | } | |
473 | ||
474 | info->hdev = hdev; | |
475 | ||
c13854ce | 476 | hdev->bus = HCI_PCCARD; |
155961e8 | 477 | hci_set_drvdata(hdev, info); |
27d35284 | 478 | SET_HCIDEV_DEV(hdev, &info->p_dev->dev); |
1da177e4 | 479 | |
71f39030 MH |
480 | hdev->open = btuart_hci_open; |
481 | hdev->close = btuart_hci_close; | |
482 | hdev->flush = btuart_hci_flush; | |
483 | hdev->send = btuart_hci_send_frame; | |
1da177e4 | 484 | |
1da177e4 LT |
485 | spin_lock_irqsave(&(info->lock), flags); |
486 | ||
487 | /* Reset UART */ | |
488 | outb(0, iobase + UART_MCR); | |
489 | ||
490 | /* Turn off interrupts */ | |
491 | outb(0, iobase + UART_IER); | |
492 | ||
493 | /* Initialize UART */ | |
494 | outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */ | |
495 | outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR); | |
496 | ||
497 | /* Turn on interrupts */ | |
498 | // outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER); | |
499 | ||
500 | spin_unlock_irqrestore(&(info->lock), flags); | |
501 | ||
502 | btuart_change_speed(info, DEFAULT_BAUD_RATE); | |
503 | ||
504 | /* Timeout before it is safe to send the first HCI packet */ | |
505 | msleep(1000); | |
506 | ||
507 | /* Register HCI device */ | |
508 | if (hci_register_dev(hdev) < 0) { | |
509 | BT_ERR("Can't register HCI device"); | |
510 | info->hdev = NULL; | |
511 | hci_free_dev(hdev); | |
512 | return -ENODEV; | |
513 | } | |
514 | ||
515 | return 0; | |
516 | } | |
517 | ||
518 | ||
ad709d48 | 519 | static int btuart_close(struct btuart_info *info) |
1da177e4 LT |
520 | { |
521 | unsigned long flags; | |
9a017a91 | 522 | unsigned int iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
523 | struct hci_dev *hdev = info->hdev; |
524 | ||
525 | if (!hdev) | |
526 | return -ENODEV; | |
527 | ||
528 | btuart_hci_close(hdev); | |
529 | ||
530 | spin_lock_irqsave(&(info->lock), flags); | |
531 | ||
532 | /* Reset UART */ | |
533 | outb(0, iobase + UART_MCR); | |
534 | ||
535 | /* Turn off interrupts */ | |
536 | outb(0, iobase + UART_IER); | |
537 | ||
538 | spin_unlock_irqrestore(&(info->lock), flags); | |
539 | ||
13ea4015 | 540 | hci_unregister_dev(hdev); |
1da177e4 LT |
541 | hci_free_dev(hdev); |
542 | ||
543 | return 0; | |
544 | } | |
545 | ||
15b99ac1 | 546 | static int btuart_probe(struct pcmcia_device *link) |
1da177e4 | 547 | { |
ad709d48 | 548 | struct btuart_info *info; |
1da177e4 LT |
549 | |
550 | /* Create new info device */ | |
fdefa118 | 551 | info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL); |
1da177e4 | 552 | if (!info) |
f8cfa618 | 553 | return -ENOMEM; |
1da177e4 | 554 | |
fba395ee | 555 | info->p_dev = link; |
1da177e4 LT |
556 | link->priv = info; |
557 | ||
00990e7c DB |
558 | link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_VPP | |
559 | CONF_AUTO_SET_IO; | |
1da177e4 | 560 | |
15b99ac1 | 561 | return btuart_config(link); |
1da177e4 LT |
562 | } |
563 | ||
564 | ||
fba395ee | 565 | static void btuart_detach(struct pcmcia_device *link) |
1da177e4 | 566 | { |
e2d40963 | 567 | btuart_release(link); |
1da177e4 LT |
568 | } |
569 | ||
00990e7c | 570 | static int btuart_check_config(struct pcmcia_device *p_dev, void *priv_data) |
1da177e4 | 571 | { |
ad913c11 | 572 | int *try = priv_data; |
90abdc3b | 573 | |
510df251 | 574 | if (!try) |
00990e7c DB |
575 | p_dev->io_lines = 16; |
576 | ||
577 | if ((p_dev->resource[0]->end != 8) || (p_dev->resource[0]->start == 0)) | |
578 | return -EINVAL; | |
579 | ||
580 | p_dev->resource[0]->end = 8; | |
581 | p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; | |
582 | p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; | |
583 | ||
584 | return pcmcia_request_io(p_dev); | |
1da177e4 LT |
585 | } |
586 | ||
ed58872a | 587 | static int btuart_check_config_notpicky(struct pcmcia_device *p_dev, |
ed58872a | 588 | void *priv_data) |
1da177e4 | 589 | { |
ed58872a DB |
590 | static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 }; |
591 | int j; | |
592 | ||
00990e7c DB |
593 | if (p_dev->io_lines > 3) |
594 | return -ENODEV; | |
595 | ||
596 | p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; | |
597 | p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; | |
598 | p_dev->resource[0]->end = 8; | |
599 | ||
600 | for (j = 0; j < 5; j++) { | |
601 | p_dev->resource[0]->start = base[j]; | |
602 | p_dev->io_lines = base[j] ? 16 : 3; | |
603 | if (!pcmcia_request_io(p_dev)) | |
604 | return 0; | |
ed58872a DB |
605 | } |
606 | return -ENODEV; | |
1da177e4 LT |
607 | } |
608 | ||
15b99ac1 | 609 | static int btuart_config(struct pcmcia_device *link) |
1da177e4 | 610 | { |
ad709d48 | 611 | struct btuart_info *info = link->priv; |
ed58872a | 612 | int i; |
ad913c11 | 613 | int try; |
ed58872a DB |
614 | |
615 | /* First pass: look for a config entry that looks normal. | |
616 | Two tries: without IO aliases, then with aliases */ | |
617 | for (try = 0; try < 2; try++) | |
ad913c11 | 618 | if (!pcmcia_loop_config(link, btuart_check_config, &try)) |
ed58872a | 619 | goto found_port; |
1da177e4 LT |
620 | |
621 | /* Second pass: try to find an entry that isn't picky about | |
622 | its base address, then try to grab any standard serial port | |
623 | address, and finally try to get any free port. */ | |
ed58872a DB |
624 | if (!pcmcia_loop_config(link, btuart_check_config_notpicky, NULL)) |
625 | goto found_port; | |
1da177e4 | 626 | |
ed58872a | 627 | BT_ERR("No usable port range found"); |
ed58872a | 628 | goto failed; |
1da177e4 | 629 | |
ed58872a | 630 | found_port: |
eb14120f | 631 | i = pcmcia_request_irq(link, btuart_interrupt); |
9ac3e58c | 632 | if (i != 0) |
eb14120f | 633 | goto failed; |
1da177e4 | 634 | |
1ac71e5a | 635 | i = pcmcia_enable_device(link); |
9ac3e58c | 636 | if (i != 0) |
1da177e4 | 637 | goto failed; |
1da177e4 LT |
638 | |
639 | if (btuart_open(info) != 0) | |
640 | goto failed; | |
641 | ||
15b99ac1 | 642 | return 0; |
1da177e4 | 643 | |
1da177e4 LT |
644 | failed: |
645 | btuart_release(link); | |
15b99ac1 | 646 | return -ENODEV; |
1da177e4 LT |
647 | } |
648 | ||
649 | ||
fba395ee | 650 | static void btuart_release(struct pcmcia_device *link) |
1da177e4 | 651 | { |
ad709d48 | 652 | struct btuart_info *info = link->priv; |
1da177e4 | 653 | |
e2d40963 | 654 | btuart_close(info); |
1da177e4 | 655 | |
fba395ee | 656 | pcmcia_disable_device(link); |
1da177e4 LT |
657 | } |
658 | ||
25f8f54f | 659 | static const struct pcmcia_device_id btuart_ids[] = { |
279c9361 DB |
660 | /* don't use this driver. Use serial_cs + hci_uart instead */ |
661 | PCMCIA_DEVICE_NULL | |
662 | }; | |
663 | MODULE_DEVICE_TABLE(pcmcia, btuart_ids); | |
664 | ||
1da177e4 LT |
665 | static struct pcmcia_driver btuart_driver = { |
666 | .owner = THIS_MODULE, | |
2e9b981a | 667 | .name = "btuart_cs", |
15b99ac1 | 668 | .probe = btuart_probe, |
cc3b4866 | 669 | .remove = btuart_detach, |
279c9361 | 670 | .id_table = btuart_ids, |
1da177e4 | 671 | }; |
e0c005f4 | 672 | module_pcmcia_driver(btuart_driver); |