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> | |
41 | #include <asm/system.h> | |
42 | #include <asm/io.h> | |
43 | ||
1da177e4 LT |
44 | #include <pcmcia/cistpl.h> |
45 | #include <pcmcia/ciscode.h> | |
46 | #include <pcmcia/ds.h> | |
47 | #include <pcmcia/cisreg.h> | |
48 | ||
49 | #include <net/bluetooth/bluetooth.h> | |
50 | #include <net/bluetooth/hci_core.h> | |
51 | ||
52 | ||
53 | ||
54 | /* ======================== Module parameters ======================== */ | |
55 | ||
56 | ||
57 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); | |
58 | MODULE_DESCRIPTION("Bluetooth driver for Bluetooth PCMCIA cards with HCI UART interface"); | |
59 | MODULE_LICENSE("GPL"); | |
60 | ||
61 | ||
62 | ||
63 | /* ======================== Local structures ======================== */ | |
64 | ||
65 | ||
66 | typedef struct btuart_info_t { | |
fd238232 | 67 | struct pcmcia_device *p_dev; |
1da177e4 LT |
68 | |
69 | struct hci_dev *hdev; | |
70 | ||
71 | spinlock_t lock; /* For serializing operations */ | |
72 | ||
73 | struct sk_buff_head txq; | |
74 | unsigned long tx_state; | |
75 | ||
76 | unsigned long rx_state; | |
77 | unsigned long rx_count; | |
78 | struct sk_buff *rx_skb; | |
79 | } btuart_info_t; | |
80 | ||
81 | ||
15b99ac1 | 82 | static int btuart_config(struct pcmcia_device *link); |
fba395ee | 83 | static void btuart_release(struct pcmcia_device *link); |
1da177e4 | 84 | |
cc3b4866 | 85 | static void btuart_detach(struct pcmcia_device *p_dev); |
1da177e4 | 86 | |
1da177e4 LT |
87 | |
88 | /* Maximum baud rate */ | |
89 | #define SPEED_MAX 115200 | |
90 | ||
91 | /* Default baud rate: 57600, 115200, 230400 or 460800 */ | |
92 | #define DEFAULT_BAUD_RATE 115200 | |
93 | ||
94 | ||
95 | /* Transmit states */ | |
96 | #define XMIT_SENDING 1 | |
97 | #define XMIT_WAKEUP 2 | |
98 | #define XMIT_WAITING 8 | |
99 | ||
100 | /* Receiver states */ | |
101 | #define RECV_WAIT_PACKET_TYPE 0 | |
102 | #define RECV_WAIT_EVENT_HEADER 1 | |
103 | #define RECV_WAIT_ACL_HEADER 2 | |
104 | #define RECV_WAIT_SCO_HEADER 3 | |
105 | #define RECV_WAIT_DATA 4 | |
106 | ||
107 | ||
108 | ||
109 | /* ======================== Interrupt handling ======================== */ | |
110 | ||
111 | ||
112 | static int btuart_write(unsigned int iobase, int fifo_size, __u8 *buf, int len) | |
113 | { | |
114 | int actual = 0; | |
115 | ||
116 | /* Tx FIFO should be empty */ | |
117 | if (!(inb(iobase + UART_LSR) & UART_LSR_THRE)) | |
118 | return 0; | |
119 | ||
120 | /* Fill FIFO with current frame */ | |
121 | while ((fifo_size-- > 0) && (actual < len)) { | |
122 | /* Transmit next byte */ | |
123 | outb(buf[actual], iobase + UART_TX); | |
124 | actual++; | |
125 | } | |
126 | ||
127 | return actual; | |
128 | } | |
129 | ||
130 | ||
131 | static void btuart_write_wakeup(btuart_info_t *info) | |
132 | { | |
133 | if (!info) { | |
134 | BT_ERR("Unknown device"); | |
135 | return; | |
136 | } | |
137 | ||
138 | if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) { | |
139 | set_bit(XMIT_WAKEUP, &(info->tx_state)); | |
140 | return; | |
141 | } | |
142 | ||
143 | do { | |
9a017a91 | 144 | register unsigned int iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
145 | register struct sk_buff *skb; |
146 | register int len; | |
147 | ||
148 | clear_bit(XMIT_WAKEUP, &(info->tx_state)); | |
149 | ||
e2d40963 | 150 | if (!pcmcia_dev_present(info->p_dev)) |
1da177e4 LT |
151 | return; |
152 | ||
153 | if (!(skb = skb_dequeue(&(info->txq)))) | |
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(btuart_info_t *info) | |
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 */ | |
191 | if (info->rx_skb == NULL) { | |
192 | info->rx_state = RECV_WAIT_PACKET_TYPE; | |
193 | info->rx_count = 0; | |
194 | if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) { | |
195 | BT_ERR("Can't allocate mem for new packet"); | |
196 | return; | |
197 | } | |
198 | } | |
199 | ||
200 | if (info->rx_state == RECV_WAIT_PACKET_TYPE) { | |
201 | ||
202 | info->rx_skb->dev = (void *) info->hdev; | |
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 LT |
225 | info->hdev->stat.err_rx++; |
226 | clear_bit(HCI_RUNNING, &(info->hdev->flags)); | |
227 | ||
228 | kfree_skb(info->rx_skb); | |
229 | info->rx_skb = NULL; | |
230 | break; | |
231 | ||
232 | } | |
233 | ||
234 | } else { | |
235 | ||
236 | *skb_put(info->rx_skb, 1) = 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: | |
2a123b86 | 250 | eh = hci_event_hdr(info->rx_skb); |
1da177e4 LT |
251 | info->rx_state = RECV_WAIT_DATA; |
252 | info->rx_count = eh->plen; | |
253 | break; | |
254 | ||
255 | case RECV_WAIT_ACL_HEADER: | |
2a123b86 | 256 | ah = hci_acl_hdr(info->rx_skb); |
1da177e4 LT |
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: | |
2a123b86 | 263 | sh = hci_sco_hdr(info->rx_skb); |
1da177e4 LT |
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->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 | ||
7d12e780 | 287 | static irqreturn_t btuart_interrupt(int irq, void *dev_inst) |
1da177e4 LT |
288 | { |
289 | btuart_info_t *info = dev_inst; | |
290 | unsigned int iobase; | |
291 | int boguscount = 0; | |
292 | int iir, lsr; | |
aafcf998 | 293 | irqreturn_t r = IRQ_NONE; |
1da177e4 | 294 | |
7427847d MF |
295 | if (!info || !info->hdev) |
296 | /* our irq handler is shared */ | |
297 | return IRQ_NONE; | |
1da177e4 | 298 | |
9a017a91 | 299 | iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
300 | |
301 | spin_lock(&(info->lock)); | |
302 | ||
303 | iir = inb(iobase + UART_IIR) & UART_IIR_ID; | |
304 | while (iir) { | |
aafcf998 | 305 | r = IRQ_HANDLED; |
1da177e4 LT |
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 | ||
aafcf998 | 339 | return r; |
1da177e4 LT |
340 | } |
341 | ||
342 | ||
343 | static void btuart_change_speed(btuart_info_t *info, unsigned int speed) | |
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 | { | |
400 | btuart_info_t *info = (btuart_info_t *)(hdev->driver_data); | |
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 | { | |
411 | set_bit(HCI_RUNNING, &(hdev->flags)); | |
412 | ||
413 | return 0; | |
414 | } | |
415 | ||
416 | ||
417 | static int btuart_hci_close(struct hci_dev *hdev) | |
418 | { | |
419 | if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags))) | |
420 | return 0; | |
421 | ||
422 | btuart_hci_flush(hdev); | |
423 | ||
424 | return 0; | |
425 | } | |
426 | ||
427 | ||
428 | static int btuart_hci_send_frame(struct sk_buff *skb) | |
429 | { | |
430 | btuart_info_t *info; | |
431 | struct hci_dev *hdev = (struct hci_dev *)(skb->dev); | |
432 | ||
433 | if (!hdev) { | |
434 | BT_ERR("Frame for unknown HCI device (hdev=NULL)"); | |
435 | return -ENODEV; | |
436 | } | |
437 | ||
438 | info = (btuart_info_t *)(hdev->driver_data); | |
439 | ||
0d48d939 | 440 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
441 | case HCI_COMMAND_PKT: |
442 | hdev->stat.cmd_tx++; | |
443 | break; | |
444 | case HCI_ACLDATA_PKT: | |
445 | hdev->stat.acl_tx++; | |
446 | break; | |
447 | case HCI_SCODATA_PKT: | |
448 | hdev->stat.sco_tx++; | |
449 | break; | |
450 | }; | |
451 | ||
452 | /* Prepend skb with frame type */ | |
0d48d939 | 453 | memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1); |
1da177e4 LT |
454 | skb_queue_tail(&(info->txq), skb); |
455 | ||
456 | btuart_write_wakeup(info); | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
461 | ||
462 | static void btuart_hci_destruct(struct hci_dev *hdev) | |
463 | { | |
464 | } | |
465 | ||
466 | ||
467 | static int btuart_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 btuart_open(btuart_info_t *info) | |
478 | { | |
479 | unsigned long flags; | |
9a017a91 | 480 | unsigned int iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
481 | struct hci_dev *hdev; |
482 | ||
483 | spin_lock_init(&(info->lock)); | |
484 | ||
485 | skb_queue_head_init(&(info->txq)); | |
486 | ||
487 | info->rx_state = RECV_WAIT_PACKET_TYPE; | |
488 | info->rx_count = 0; | |
489 | info->rx_skb = NULL; | |
490 | ||
491 | /* Initialize HCI device */ | |
492 | hdev = hci_alloc_dev(); | |
493 | if (!hdev) { | |
494 | BT_ERR("Can't allocate HCI device"); | |
495 | return -ENOMEM; | |
496 | } | |
497 | ||
498 | info->hdev = hdev; | |
499 | ||
c13854ce | 500 | hdev->bus = HCI_PCCARD; |
1da177e4 | 501 | hdev->driver_data = info; |
27d35284 | 502 | SET_HCIDEV_DEV(hdev, &info->p_dev->dev); |
1da177e4 LT |
503 | |
504 | hdev->open = btuart_hci_open; | |
505 | hdev->close = btuart_hci_close; | |
506 | hdev->flush = btuart_hci_flush; | |
507 | hdev->send = btuart_hci_send_frame; | |
508 | hdev->destruct = btuart_hci_destruct; | |
509 | hdev->ioctl = btuart_hci_ioctl; | |
510 | ||
511 | hdev->owner = THIS_MODULE; | |
512 | ||
513 | spin_lock_irqsave(&(info->lock), flags); | |
514 | ||
515 | /* Reset UART */ | |
516 | outb(0, iobase + UART_MCR); | |
517 | ||
518 | /* Turn off interrupts */ | |
519 | outb(0, iobase + UART_IER); | |
520 | ||
521 | /* Initialize UART */ | |
522 | outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */ | |
523 | outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR); | |
524 | ||
525 | /* Turn on interrupts */ | |
526 | // outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER); | |
527 | ||
528 | spin_unlock_irqrestore(&(info->lock), flags); | |
529 | ||
530 | btuart_change_speed(info, DEFAULT_BAUD_RATE); | |
531 | ||
532 | /* Timeout before it is safe to send the first HCI packet */ | |
533 | msleep(1000); | |
534 | ||
535 | /* Register HCI device */ | |
536 | if (hci_register_dev(hdev) < 0) { | |
537 | BT_ERR("Can't register HCI device"); | |
538 | info->hdev = NULL; | |
539 | hci_free_dev(hdev); | |
540 | return -ENODEV; | |
541 | } | |
542 | ||
543 | return 0; | |
544 | } | |
545 | ||
546 | ||
547 | static int btuart_close(btuart_info_t *info) | |
548 | { | |
549 | unsigned long flags; | |
9a017a91 | 550 | unsigned int iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
551 | struct hci_dev *hdev = info->hdev; |
552 | ||
553 | if (!hdev) | |
554 | return -ENODEV; | |
555 | ||
556 | btuart_hci_close(hdev); | |
557 | ||
558 | spin_lock_irqsave(&(info->lock), flags); | |
559 | ||
560 | /* Reset UART */ | |
561 | outb(0, iobase + UART_MCR); | |
562 | ||
563 | /* Turn off interrupts */ | |
564 | outb(0, iobase + UART_IER); | |
565 | ||
566 | spin_unlock_irqrestore(&(info->lock), flags); | |
567 | ||
568 | if (hci_unregister_dev(hdev) < 0) | |
569 | BT_ERR("Can't unregister HCI device %s", hdev->name); | |
570 | ||
571 | hci_free_dev(hdev); | |
572 | ||
573 | return 0; | |
574 | } | |
575 | ||
15b99ac1 | 576 | static int btuart_probe(struct pcmcia_device *link) |
1da177e4 LT |
577 | { |
578 | btuart_info_t *info; | |
1da177e4 LT |
579 | |
580 | /* Create new info device */ | |
089b1dbb | 581 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 | 582 | if (!info) |
f8cfa618 | 583 | return -ENOMEM; |
1da177e4 | 584 | |
fba395ee | 585 | info->p_dev = link; |
1da177e4 LT |
586 | link->priv = info; |
587 | ||
00990e7c DB |
588 | link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_VPP | |
589 | CONF_AUTO_SET_IO; | |
1da177e4 | 590 | |
15b99ac1 | 591 | return btuart_config(link); |
1da177e4 LT |
592 | } |
593 | ||
594 | ||
fba395ee | 595 | static void btuart_detach(struct pcmcia_device *link) |
1da177e4 LT |
596 | { |
597 | btuart_info_t *info = link->priv; | |
1da177e4 | 598 | |
e2d40963 | 599 | btuart_release(link); |
1da177e4 LT |
600 | kfree(info); |
601 | } | |
602 | ||
00990e7c | 603 | static int btuart_check_config(struct pcmcia_device *p_dev, void *priv_data) |
1da177e4 | 604 | { |
ad913c11 | 605 | int *try = priv_data; |
90abdc3b | 606 | |
00990e7c DB |
607 | if (try == 0) |
608 | p_dev->io_lines = 16; | |
609 | ||
610 | if ((p_dev->resource[0]->end != 8) || (p_dev->resource[0]->start == 0)) | |
611 | return -EINVAL; | |
612 | ||
613 | p_dev->resource[0]->end = 8; | |
614 | p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; | |
615 | p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; | |
616 | ||
617 | return pcmcia_request_io(p_dev); | |
1da177e4 LT |
618 | } |
619 | ||
ed58872a | 620 | static int btuart_check_config_notpicky(struct pcmcia_device *p_dev, |
ed58872a | 621 | void *priv_data) |
1da177e4 | 622 | { |
ed58872a DB |
623 | static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 }; |
624 | int j; | |
625 | ||
00990e7c DB |
626 | if (p_dev->io_lines > 3) |
627 | return -ENODEV; | |
628 | ||
629 | p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; | |
630 | p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; | |
631 | p_dev->resource[0]->end = 8; | |
632 | ||
633 | for (j = 0; j < 5; j++) { | |
634 | p_dev->resource[0]->start = base[j]; | |
635 | p_dev->io_lines = base[j] ? 16 : 3; | |
636 | if (!pcmcia_request_io(p_dev)) | |
637 | return 0; | |
ed58872a DB |
638 | } |
639 | return -ENODEV; | |
1da177e4 LT |
640 | } |
641 | ||
15b99ac1 | 642 | static int btuart_config(struct pcmcia_device *link) |
1da177e4 | 643 | { |
1da177e4 | 644 | btuart_info_t *info = link->priv; |
ed58872a | 645 | int i; |
ad913c11 | 646 | int try; |
ed58872a DB |
647 | |
648 | /* First pass: look for a config entry that looks normal. | |
649 | Two tries: without IO aliases, then with aliases */ | |
650 | for (try = 0; try < 2; try++) | |
ad913c11 | 651 | if (!pcmcia_loop_config(link, btuart_check_config, &try)) |
ed58872a | 652 | goto found_port; |
1da177e4 LT |
653 | |
654 | /* Second pass: try to find an entry that isn't picky about | |
655 | its base address, then try to grab any standard serial port | |
656 | address, and finally try to get any free port. */ | |
ed58872a DB |
657 | if (!pcmcia_loop_config(link, btuart_check_config_notpicky, NULL)) |
658 | goto found_port; | |
1da177e4 | 659 | |
ed58872a | 660 | BT_ERR("No usable port range found"); |
ed58872a | 661 | goto failed; |
1da177e4 | 662 | |
ed58872a | 663 | found_port: |
eb14120f | 664 | i = pcmcia_request_irq(link, btuart_interrupt); |
9ac3e58c | 665 | if (i != 0) |
eb14120f | 666 | goto failed; |
1da177e4 | 667 | |
1ac71e5a | 668 | i = pcmcia_enable_device(link); |
9ac3e58c | 669 | if (i != 0) |
1da177e4 | 670 | goto failed; |
1da177e4 LT |
671 | |
672 | if (btuart_open(info) != 0) | |
673 | goto failed; | |
674 | ||
15b99ac1 | 675 | return 0; |
1da177e4 | 676 | |
1da177e4 LT |
677 | failed: |
678 | btuart_release(link); | |
15b99ac1 | 679 | return -ENODEV; |
1da177e4 LT |
680 | } |
681 | ||
682 | ||
fba395ee | 683 | static void btuart_release(struct pcmcia_device *link) |
1da177e4 LT |
684 | { |
685 | btuart_info_t *info = link->priv; | |
686 | ||
e2d40963 | 687 | btuart_close(info); |
1da177e4 | 688 | |
fba395ee | 689 | pcmcia_disable_device(link); |
1da177e4 LT |
690 | } |
691 | ||
25f8f54f | 692 | static const struct pcmcia_device_id btuart_ids[] = { |
279c9361 DB |
693 | /* don't use this driver. Use serial_cs + hci_uart instead */ |
694 | PCMCIA_DEVICE_NULL | |
695 | }; | |
696 | MODULE_DEVICE_TABLE(pcmcia, btuart_ids); | |
697 | ||
1da177e4 LT |
698 | static struct pcmcia_driver btuart_driver = { |
699 | .owner = THIS_MODULE, | |
2e9b981a | 700 | .name = "btuart_cs", |
15b99ac1 | 701 | .probe = btuart_probe, |
cc3b4866 | 702 | .remove = btuart_detach, |
279c9361 | 703 | .id_table = btuart_ids, |
1da177e4 LT |
704 | }; |
705 | ||
706 | static int __init init_btuart_cs(void) | |
707 | { | |
708 | return pcmcia_register_driver(&btuart_driver); | |
709 | } | |
710 | ||
711 | ||
712 | static void __exit exit_btuart_cs(void) | |
713 | { | |
714 | pcmcia_unregister_driver(&btuart_driver); | |
1da177e4 LT |
715 | } |
716 | ||
717 | module_init(init_btuart_cs); | |
718 | module_exit(exit_btuart_cs); |