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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> | |
1da177e4 LT |
41 | #include <asm/io.h> |
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 | ||
65 | typedef struct btuart_info_t { | |
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; | |
78 | } btuart_info_t; | |
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 | ||
130 | static void btuart_write_wakeup(btuart_info_t *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 { | |
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 | ||
152 | if (!(skb = skb_dequeue(&(info->txq)))) | |
153 | break; | |
154 | ||
155 | /* Send frame */ | |
156 | len = btuart_write(iobase, 16, skb->data, skb->len); | |
157 | set_bit(XMIT_WAKEUP, &(info->tx_state)); | |
158 | ||
159 | if (len == skb->len) { | |
160 | kfree_skb(skb); | |
161 | } else { | |
162 | skb_pull(skb, len); | |
163 | skb_queue_head(&(info->txq), skb); | |
164 | } | |
165 | ||
166 | info->hdev->stat.byte_tx += len; | |
167 | ||
168 | } while (test_bit(XMIT_WAKEUP, &(info->tx_state))); | |
169 | ||
170 | clear_bit(XMIT_SENDING, &(info->tx_state)); | |
171 | } | |
172 | ||
173 | ||
174 | static void btuart_receive(btuart_info_t *info) | |
175 | { | |
176 | unsigned int iobase; | |
177 | int boguscount = 0; | |
178 | ||
179 | if (!info) { | |
180 | BT_ERR("Unknown device"); | |
181 | return; | |
182 | } | |
183 | ||
9a017a91 | 184 | iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
185 | |
186 | do { | |
187 | info->hdev->stat.byte_rx++; | |
188 | ||
189 | /* Allocate packet */ | |
190 | if (info->rx_skb == NULL) { | |
191 | info->rx_state = RECV_WAIT_PACKET_TYPE; | |
192 | info->rx_count = 0; | |
193 | if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) { | |
194 | BT_ERR("Can't allocate mem for new packet"); | |
195 | return; | |
196 | } | |
197 | } | |
198 | ||
199 | if (info->rx_state == RECV_WAIT_PACKET_TYPE) { | |
200 | ||
201 | info->rx_skb->dev = (void *) info->hdev; | |
0d48d939 | 202 | bt_cb(info->rx_skb)->pkt_type = inb(iobase + UART_RX); |
1da177e4 | 203 | |
0d48d939 | 204 | switch (bt_cb(info->rx_skb)->pkt_type) { |
1da177e4 LT |
205 | |
206 | case HCI_EVENT_PKT: | |
207 | info->rx_state = RECV_WAIT_EVENT_HEADER; | |
208 | info->rx_count = HCI_EVENT_HDR_SIZE; | |
209 | break; | |
210 | ||
211 | case HCI_ACLDATA_PKT: | |
212 | info->rx_state = RECV_WAIT_ACL_HEADER; | |
213 | info->rx_count = HCI_ACL_HDR_SIZE; | |
214 | break; | |
215 | ||
216 | case HCI_SCODATA_PKT: | |
217 | info->rx_state = RECV_WAIT_SCO_HEADER; | |
218 | info->rx_count = HCI_SCO_HDR_SIZE; | |
219 | break; | |
220 | ||
221 | default: | |
222 | /* Unknown packet */ | |
0d48d939 | 223 | BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type); |
1da177e4 LT |
224 | info->hdev->stat.err_rx++; |
225 | clear_bit(HCI_RUNNING, &(info->hdev->flags)); | |
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: | |
268 | hci_recv_frame(info->rx_skb); | |
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 LT |
287 | { |
288 | btuart_info_t *info = dev_inst; | |
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 | ||
342 | static void btuart_change_speed(btuart_info_t *info, unsigned int speed) | |
343 | { | |
344 | unsigned long flags; | |
345 | unsigned int iobase; | |
346 | int fcr; /* FIFO control reg */ | |
347 | int lcr; /* Line control reg */ | |
348 | int divisor; | |
349 | ||
350 | if (!info) { | |
351 | BT_ERR("Unknown device"); | |
352 | return; | |
353 | } | |
354 | ||
9a017a91 | 355 | iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
356 | |
357 | spin_lock_irqsave(&(info->lock), flags); | |
358 | ||
359 | /* Turn off interrupts */ | |
360 | outb(0, iobase + UART_IER); | |
361 | ||
362 | divisor = SPEED_MAX / speed; | |
363 | ||
364 | fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT; | |
365 | ||
366 | /* | |
367 | * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and | |
368 | * almost 1,7 ms at 19200 bps. At speeds above that we can just forget | |
369 | * about this timeout since it will always be fast enough. | |
370 | */ | |
371 | ||
372 | if (speed < 38400) | |
373 | fcr |= UART_FCR_TRIGGER_1; | |
374 | else | |
375 | fcr |= UART_FCR_TRIGGER_14; | |
376 | ||
377 | /* Bluetooth cards use 8N1 */ | |
378 | lcr = UART_LCR_WLEN8; | |
379 | ||
380 | outb(UART_LCR_DLAB | lcr, iobase + UART_LCR); /* Set DLAB */ | |
381 | outb(divisor & 0xff, iobase + UART_DLL); /* Set speed */ | |
382 | outb(divisor >> 8, iobase + UART_DLM); | |
383 | outb(lcr, iobase + UART_LCR); /* Set 8N1 */ | |
384 | outb(fcr, iobase + UART_FCR); /* Enable FIFO's */ | |
385 | ||
b92b1c57 | 386 | /* Turn on interrupts */ |
1da177e4 LT |
387 | outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER); |
388 | ||
389 | spin_unlock_irqrestore(&(info->lock), flags); | |
390 | } | |
391 | ||
392 | ||
393 | ||
394 | /* ======================== HCI interface ======================== */ | |
395 | ||
396 | ||
397 | static int btuart_hci_flush(struct hci_dev *hdev) | |
398 | { | |
155961e8 | 399 | btuart_info_t *info = hci_get_drvdata(hdev); |
1da177e4 LT |
400 | |
401 | /* Drop TX queue */ | |
402 | skb_queue_purge(&(info->txq)); | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
407 | ||
408 | static int btuart_hci_open(struct hci_dev *hdev) | |
409 | { | |
410 | set_bit(HCI_RUNNING, &(hdev->flags)); | |
411 | ||
412 | return 0; | |
413 | } | |
414 | ||
415 | ||
416 | static int btuart_hci_close(struct hci_dev *hdev) | |
417 | { | |
418 | if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags))) | |
419 | return 0; | |
420 | ||
421 | btuart_hci_flush(hdev); | |
422 | ||
423 | return 0; | |
424 | } | |
425 | ||
426 | ||
427 | static int btuart_hci_send_frame(struct sk_buff *skb) | |
428 | { | |
429 | btuart_info_t *info; | |
430 | struct hci_dev *hdev = (struct hci_dev *)(skb->dev); | |
431 | ||
432 | if (!hdev) { | |
433 | BT_ERR("Frame for unknown HCI device (hdev=NULL)"); | |
434 | return -ENODEV; | |
435 | } | |
436 | ||
155961e8 | 437 | info = hci_get_drvdata(hdev); |
1da177e4 | 438 | |
0d48d939 | 439 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
440 | case HCI_COMMAND_PKT: |
441 | hdev->stat.cmd_tx++; | |
442 | break; | |
443 | case HCI_ACLDATA_PKT: | |
444 | hdev->stat.acl_tx++; | |
445 | break; | |
446 | case HCI_SCODATA_PKT: | |
447 | hdev->stat.sco_tx++; | |
448 | break; | |
5ad77795 | 449 | } |
1da177e4 LT |
450 | |
451 | /* Prepend skb with frame type */ | |
0d48d939 | 452 | memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1); |
1da177e4 LT |
453 | skb_queue_tail(&(info->txq), skb); |
454 | ||
455 | btuart_write_wakeup(info); | |
456 | ||
457 | return 0; | |
458 | } | |
459 | ||
460 | ||
1da177e4 LT |
461 | static int btuart_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg) |
462 | { | |
463 | return -ENOIOCTLCMD; | |
464 | } | |
465 | ||
466 | ||
467 | ||
468 | /* ======================== Card services HCI interaction ======================== */ | |
469 | ||
470 | ||
471 | static int btuart_open(btuart_info_t *info) | |
472 | { | |
473 | unsigned long flags; | |
9a017a91 | 474 | unsigned int iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
475 | struct hci_dev *hdev; |
476 | ||
477 | spin_lock_init(&(info->lock)); | |
478 | ||
479 | skb_queue_head_init(&(info->txq)); | |
480 | ||
481 | info->rx_state = RECV_WAIT_PACKET_TYPE; | |
482 | info->rx_count = 0; | |
483 | info->rx_skb = NULL; | |
484 | ||
485 | /* Initialize HCI device */ | |
486 | hdev = hci_alloc_dev(); | |
487 | if (!hdev) { | |
488 | BT_ERR("Can't allocate HCI device"); | |
489 | return -ENOMEM; | |
490 | } | |
491 | ||
492 | info->hdev = hdev; | |
493 | ||
c13854ce | 494 | hdev->bus = HCI_PCCARD; |
155961e8 | 495 | hci_set_drvdata(hdev, info); |
27d35284 | 496 | SET_HCIDEV_DEV(hdev, &info->p_dev->dev); |
1da177e4 LT |
497 | |
498 | hdev->open = btuart_hci_open; | |
499 | hdev->close = btuart_hci_close; | |
500 | hdev->flush = btuart_hci_flush; | |
501 | hdev->send = btuart_hci_send_frame; | |
1da177e4 LT |
502 | hdev->ioctl = btuart_hci_ioctl; |
503 | ||
1da177e4 LT |
504 | spin_lock_irqsave(&(info->lock), flags); |
505 | ||
506 | /* Reset UART */ | |
507 | outb(0, iobase + UART_MCR); | |
508 | ||
509 | /* Turn off interrupts */ | |
510 | outb(0, iobase + UART_IER); | |
511 | ||
512 | /* Initialize UART */ | |
513 | outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */ | |
514 | outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR); | |
515 | ||
516 | /* Turn on interrupts */ | |
517 | // outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER); | |
518 | ||
519 | spin_unlock_irqrestore(&(info->lock), flags); | |
520 | ||
521 | btuart_change_speed(info, DEFAULT_BAUD_RATE); | |
522 | ||
523 | /* Timeout before it is safe to send the first HCI packet */ | |
524 | msleep(1000); | |
525 | ||
526 | /* Register HCI device */ | |
527 | if (hci_register_dev(hdev) < 0) { | |
528 | BT_ERR("Can't register HCI device"); | |
529 | info->hdev = NULL; | |
530 | hci_free_dev(hdev); | |
531 | return -ENODEV; | |
532 | } | |
533 | ||
534 | return 0; | |
535 | } | |
536 | ||
537 | ||
538 | static int btuart_close(btuart_info_t *info) | |
539 | { | |
540 | unsigned long flags; | |
9a017a91 | 541 | unsigned int iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
542 | struct hci_dev *hdev = info->hdev; |
543 | ||
544 | if (!hdev) | |
545 | return -ENODEV; | |
546 | ||
547 | btuart_hci_close(hdev); | |
548 | ||
549 | spin_lock_irqsave(&(info->lock), flags); | |
550 | ||
551 | /* Reset UART */ | |
552 | outb(0, iobase + UART_MCR); | |
553 | ||
554 | /* Turn off interrupts */ | |
555 | outb(0, iobase + UART_IER); | |
556 | ||
557 | spin_unlock_irqrestore(&(info->lock), flags); | |
558 | ||
13ea4015 | 559 | hci_unregister_dev(hdev); |
1da177e4 LT |
560 | hci_free_dev(hdev); |
561 | ||
562 | return 0; | |
563 | } | |
564 | ||
15b99ac1 | 565 | static int btuart_probe(struct pcmcia_device *link) |
1da177e4 LT |
566 | { |
567 | btuart_info_t *info; | |
1da177e4 LT |
568 | |
569 | /* Create new info device */ | |
fdefa118 | 570 | info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL); |
1da177e4 | 571 | if (!info) |
f8cfa618 | 572 | return -ENOMEM; |
1da177e4 | 573 | |
fba395ee | 574 | info->p_dev = link; |
1da177e4 LT |
575 | link->priv = info; |
576 | ||
00990e7c DB |
577 | link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_VPP | |
578 | CONF_AUTO_SET_IO; | |
1da177e4 | 579 | |
15b99ac1 | 580 | return btuart_config(link); |
1da177e4 LT |
581 | } |
582 | ||
583 | ||
fba395ee | 584 | static void btuart_detach(struct pcmcia_device *link) |
1da177e4 | 585 | { |
e2d40963 | 586 | btuart_release(link); |
1da177e4 LT |
587 | } |
588 | ||
00990e7c | 589 | static int btuart_check_config(struct pcmcia_device *p_dev, void *priv_data) |
1da177e4 | 590 | { |
ad913c11 | 591 | int *try = priv_data; |
90abdc3b | 592 | |
510df251 | 593 | if (!try) |
00990e7c DB |
594 | p_dev->io_lines = 16; |
595 | ||
596 | if ((p_dev->resource[0]->end != 8) || (p_dev->resource[0]->start == 0)) | |
597 | return -EINVAL; | |
598 | ||
599 | p_dev->resource[0]->end = 8; | |
600 | p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; | |
601 | p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; | |
602 | ||
603 | return pcmcia_request_io(p_dev); | |
1da177e4 LT |
604 | } |
605 | ||
ed58872a | 606 | static int btuart_check_config_notpicky(struct pcmcia_device *p_dev, |
ed58872a | 607 | void *priv_data) |
1da177e4 | 608 | { |
ed58872a DB |
609 | static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 }; |
610 | int j; | |
611 | ||
00990e7c DB |
612 | if (p_dev->io_lines > 3) |
613 | return -ENODEV; | |
614 | ||
615 | p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; | |
616 | p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; | |
617 | p_dev->resource[0]->end = 8; | |
618 | ||
619 | for (j = 0; j < 5; j++) { | |
620 | p_dev->resource[0]->start = base[j]; | |
621 | p_dev->io_lines = base[j] ? 16 : 3; | |
622 | if (!pcmcia_request_io(p_dev)) | |
623 | return 0; | |
ed58872a DB |
624 | } |
625 | return -ENODEV; | |
1da177e4 LT |
626 | } |
627 | ||
15b99ac1 | 628 | static int btuart_config(struct pcmcia_device *link) |
1da177e4 | 629 | { |
1da177e4 | 630 | btuart_info_t *info = link->priv; |
ed58872a | 631 | int i; |
ad913c11 | 632 | int try; |
ed58872a DB |
633 | |
634 | /* First pass: look for a config entry that looks normal. | |
635 | Two tries: without IO aliases, then with aliases */ | |
636 | for (try = 0; try < 2; try++) | |
ad913c11 | 637 | if (!pcmcia_loop_config(link, btuart_check_config, &try)) |
ed58872a | 638 | goto found_port; |
1da177e4 LT |
639 | |
640 | /* Second pass: try to find an entry that isn't picky about | |
641 | its base address, then try to grab any standard serial port | |
642 | address, and finally try to get any free port. */ | |
ed58872a DB |
643 | if (!pcmcia_loop_config(link, btuart_check_config_notpicky, NULL)) |
644 | goto found_port; | |
1da177e4 | 645 | |
ed58872a | 646 | BT_ERR("No usable port range found"); |
ed58872a | 647 | goto failed; |
1da177e4 | 648 | |
ed58872a | 649 | found_port: |
eb14120f | 650 | i = pcmcia_request_irq(link, btuart_interrupt); |
9ac3e58c | 651 | if (i != 0) |
eb14120f | 652 | goto failed; |
1da177e4 | 653 | |
1ac71e5a | 654 | i = pcmcia_enable_device(link); |
9ac3e58c | 655 | if (i != 0) |
1da177e4 | 656 | goto failed; |
1da177e4 LT |
657 | |
658 | if (btuart_open(info) != 0) | |
659 | goto failed; | |
660 | ||
15b99ac1 | 661 | return 0; |
1da177e4 | 662 | |
1da177e4 LT |
663 | failed: |
664 | btuart_release(link); | |
15b99ac1 | 665 | return -ENODEV; |
1da177e4 LT |
666 | } |
667 | ||
668 | ||
fba395ee | 669 | static void btuart_release(struct pcmcia_device *link) |
1da177e4 LT |
670 | { |
671 | btuart_info_t *info = link->priv; | |
672 | ||
e2d40963 | 673 | btuart_close(info); |
1da177e4 | 674 | |
fba395ee | 675 | pcmcia_disable_device(link); |
1da177e4 LT |
676 | } |
677 | ||
25f8f54f | 678 | static const struct pcmcia_device_id btuart_ids[] = { |
279c9361 DB |
679 | /* don't use this driver. Use serial_cs + hci_uart instead */ |
680 | PCMCIA_DEVICE_NULL | |
681 | }; | |
682 | MODULE_DEVICE_TABLE(pcmcia, btuart_ids); | |
683 | ||
1da177e4 LT |
684 | static struct pcmcia_driver btuart_driver = { |
685 | .owner = THIS_MODULE, | |
2e9b981a | 686 | .name = "btuart_cs", |
15b99ac1 | 687 | .probe = btuart_probe, |
cc3b4866 | 688 | .remove = btuart_detach, |
279c9361 | 689 | .id_table = btuart_ids, |
1da177e4 LT |
690 | }; |
691 | ||
692 | static int __init init_btuart_cs(void) | |
693 | { | |
694 | return pcmcia_register_driver(&btuart_driver); | |
695 | } | |
696 | ||
697 | ||
698 | static void __exit exit_btuart_cs(void) | |
699 | { | |
700 | pcmcia_unregister_driver(&btuart_driver); | |
1da177e4 LT |
701 | } |
702 | ||
703 | module_init(init_btuart_cs); | |
704 | module_exit(exit_btuart_cs); |