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/cs.h> |
45 | #include <pcmcia/cistpl.h> | |
46 | #include <pcmcia/ciscode.h> | |
47 | #include <pcmcia/ds.h> | |
48 | #include <pcmcia/cisreg.h> | |
49 | ||
50 | #include <net/bluetooth/bluetooth.h> | |
51 | #include <net/bluetooth/hci_core.h> | |
52 | ||
53 | ||
54 | ||
55 | /* ======================== Module parameters ======================== */ | |
56 | ||
57 | ||
58 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); | |
59 | MODULE_DESCRIPTION("Bluetooth driver for Bluetooth PCMCIA cards with HCI UART interface"); | |
60 | MODULE_LICENSE("GPL"); | |
61 | ||
62 | ||
63 | ||
64 | /* ======================== Local structures ======================== */ | |
65 | ||
66 | ||
67 | typedef struct btuart_info_t { | |
fd238232 | 68 | struct pcmcia_device *p_dev; |
1da177e4 LT |
69 | |
70 | struct hci_dev *hdev; | |
71 | ||
72 | spinlock_t lock; /* For serializing operations */ | |
73 | ||
74 | struct sk_buff_head txq; | |
75 | unsigned long tx_state; | |
76 | ||
77 | unsigned long rx_state; | |
78 | unsigned long rx_count; | |
79 | struct sk_buff *rx_skb; | |
80 | } btuart_info_t; | |
81 | ||
82 | ||
15b99ac1 | 83 | static int btuart_config(struct pcmcia_device *link); |
fba395ee | 84 | static void btuart_release(struct pcmcia_device *link); |
1da177e4 | 85 | |
cc3b4866 | 86 | static void btuart_detach(struct pcmcia_device *p_dev); |
1da177e4 | 87 | |
1da177e4 LT |
88 | |
89 | /* Maximum baud rate */ | |
90 | #define SPEED_MAX 115200 | |
91 | ||
92 | /* Default baud rate: 57600, 115200, 230400 or 460800 */ | |
93 | #define DEFAULT_BAUD_RATE 115200 | |
94 | ||
95 | ||
96 | /* Transmit states */ | |
97 | #define XMIT_SENDING 1 | |
98 | #define XMIT_WAKEUP 2 | |
99 | #define XMIT_WAITING 8 | |
100 | ||
101 | /* Receiver states */ | |
102 | #define RECV_WAIT_PACKET_TYPE 0 | |
103 | #define RECV_WAIT_EVENT_HEADER 1 | |
104 | #define RECV_WAIT_ACL_HEADER 2 | |
105 | #define RECV_WAIT_SCO_HEADER 3 | |
106 | #define RECV_WAIT_DATA 4 | |
107 | ||
108 | ||
109 | ||
110 | /* ======================== Interrupt handling ======================== */ | |
111 | ||
112 | ||
113 | static int btuart_write(unsigned int iobase, int fifo_size, __u8 *buf, int len) | |
114 | { | |
115 | int actual = 0; | |
116 | ||
117 | /* Tx FIFO should be empty */ | |
118 | if (!(inb(iobase + UART_LSR) & UART_LSR_THRE)) | |
119 | return 0; | |
120 | ||
121 | /* Fill FIFO with current frame */ | |
122 | while ((fifo_size-- > 0) && (actual < len)) { | |
123 | /* Transmit next byte */ | |
124 | outb(buf[actual], iobase + UART_TX); | |
125 | actual++; | |
126 | } | |
127 | ||
128 | return actual; | |
129 | } | |
130 | ||
131 | ||
132 | static void btuart_write_wakeup(btuart_info_t *info) | |
133 | { | |
134 | if (!info) { | |
135 | BT_ERR("Unknown device"); | |
136 | return; | |
137 | } | |
138 | ||
139 | if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) { | |
140 | set_bit(XMIT_WAKEUP, &(info->tx_state)); | |
141 | return; | |
142 | } | |
143 | ||
144 | do { | |
9a017a91 | 145 | register unsigned int iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
146 | register struct sk_buff *skb; |
147 | register int len; | |
148 | ||
149 | clear_bit(XMIT_WAKEUP, &(info->tx_state)); | |
150 | ||
e2d40963 | 151 | if (!pcmcia_dev_present(info->p_dev)) |
1da177e4 LT |
152 | return; |
153 | ||
154 | if (!(skb = skb_dequeue(&(info->txq)))) | |
155 | break; | |
156 | ||
157 | /* Send frame */ | |
158 | len = btuart_write(iobase, 16, skb->data, skb->len); | |
159 | set_bit(XMIT_WAKEUP, &(info->tx_state)); | |
160 | ||
161 | if (len == skb->len) { | |
162 | kfree_skb(skb); | |
163 | } else { | |
164 | skb_pull(skb, len); | |
165 | skb_queue_head(&(info->txq), skb); | |
166 | } | |
167 | ||
168 | info->hdev->stat.byte_tx += len; | |
169 | ||
170 | } while (test_bit(XMIT_WAKEUP, &(info->tx_state))); | |
171 | ||
172 | clear_bit(XMIT_SENDING, &(info->tx_state)); | |
173 | } | |
174 | ||
175 | ||
176 | static void btuart_receive(btuart_info_t *info) | |
177 | { | |
178 | unsigned int iobase; | |
179 | int boguscount = 0; | |
180 | ||
181 | if (!info) { | |
182 | BT_ERR("Unknown device"); | |
183 | return; | |
184 | } | |
185 | ||
9a017a91 | 186 | iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
187 | |
188 | do { | |
189 | info->hdev->stat.byte_rx++; | |
190 | ||
191 | /* Allocate packet */ | |
192 | if (info->rx_skb == NULL) { | |
193 | info->rx_state = RECV_WAIT_PACKET_TYPE; | |
194 | info->rx_count = 0; | |
195 | if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) { | |
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 | info->rx_skb->dev = (void *) info->hdev; | |
0d48d939 | 204 | bt_cb(info->rx_skb)->pkt_type = inb(iobase + UART_RX); |
1da177e4 | 205 | |
0d48d939 | 206 | switch (bt_cb(info->rx_skb)->pkt_type) { |
1da177e4 LT |
207 | |
208 | case HCI_EVENT_PKT: | |
209 | info->rx_state = RECV_WAIT_EVENT_HEADER; | |
210 | info->rx_count = HCI_EVENT_HDR_SIZE; | |
211 | break; | |
212 | ||
213 | case HCI_ACLDATA_PKT: | |
214 | info->rx_state = RECV_WAIT_ACL_HEADER; | |
215 | info->rx_count = HCI_ACL_HDR_SIZE; | |
216 | break; | |
217 | ||
218 | case HCI_SCODATA_PKT: | |
219 | info->rx_state = RECV_WAIT_SCO_HEADER; | |
220 | info->rx_count = HCI_SCO_HDR_SIZE; | |
221 | break; | |
222 | ||
223 | default: | |
224 | /* Unknown packet */ | |
0d48d939 | 225 | BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type); |
1da177e4 LT |
226 | info->hdev->stat.err_rx++; |
227 | clear_bit(HCI_RUNNING, &(info->hdev->flags)); | |
228 | ||
229 | kfree_skb(info->rx_skb); | |
230 | info->rx_skb = NULL; | |
231 | break; | |
232 | ||
233 | } | |
234 | ||
235 | } else { | |
236 | ||
237 | *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX); | |
238 | info->rx_count--; | |
239 | ||
240 | if (info->rx_count == 0) { | |
241 | ||
242 | int dlen; | |
243 | struct hci_event_hdr *eh; | |
244 | struct hci_acl_hdr *ah; | |
245 | struct hci_sco_hdr *sh; | |
246 | ||
247 | ||
248 | switch (info->rx_state) { | |
249 | ||
250 | case RECV_WAIT_EVENT_HEADER: | |
2a123b86 | 251 | eh = hci_event_hdr(info->rx_skb); |
1da177e4 LT |
252 | info->rx_state = RECV_WAIT_DATA; |
253 | info->rx_count = eh->plen; | |
254 | break; | |
255 | ||
256 | case RECV_WAIT_ACL_HEADER: | |
2a123b86 | 257 | ah = hci_acl_hdr(info->rx_skb); |
1da177e4 LT |
258 | dlen = __le16_to_cpu(ah->dlen); |
259 | info->rx_state = RECV_WAIT_DATA; | |
260 | info->rx_count = dlen; | |
261 | break; | |
262 | ||
263 | case RECV_WAIT_SCO_HEADER: | |
2a123b86 | 264 | sh = hci_sco_hdr(info->rx_skb); |
1da177e4 LT |
265 | info->rx_state = RECV_WAIT_DATA; |
266 | info->rx_count = sh->dlen; | |
267 | break; | |
268 | ||
269 | case RECV_WAIT_DATA: | |
270 | hci_recv_frame(info->rx_skb); | |
271 | info->rx_skb = NULL; | |
272 | break; | |
273 | ||
274 | } | |
275 | ||
276 | } | |
277 | ||
278 | } | |
279 | ||
280 | /* Make sure we don't stay here too long */ | |
281 | if (boguscount++ > 16) | |
282 | break; | |
283 | ||
284 | } while (inb(iobase + UART_LSR) & UART_LSR_DR); | |
285 | } | |
286 | ||
287 | ||
7d12e780 | 288 | static irqreturn_t btuart_interrupt(int irq, void *dev_inst) |
1da177e4 LT |
289 | { |
290 | btuart_info_t *info = dev_inst; | |
291 | unsigned int iobase; | |
292 | int boguscount = 0; | |
293 | int iir, lsr; | |
aafcf998 | 294 | irqreturn_t r = IRQ_NONE; |
1da177e4 | 295 | |
7427847d MF |
296 | if (!info || !info->hdev) |
297 | /* our irq handler is shared */ | |
298 | return IRQ_NONE; | |
1da177e4 | 299 | |
9a017a91 | 300 | iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
301 | |
302 | spin_lock(&(info->lock)); | |
303 | ||
304 | iir = inb(iobase + UART_IIR) & UART_IIR_ID; | |
305 | while (iir) { | |
aafcf998 | 306 | r = IRQ_HANDLED; |
1da177e4 LT |
307 | |
308 | /* Clear interrupt */ | |
309 | lsr = inb(iobase + UART_LSR); | |
310 | ||
311 | switch (iir) { | |
312 | case UART_IIR_RLSI: | |
313 | BT_ERR("RLSI"); | |
314 | break; | |
315 | case UART_IIR_RDI: | |
316 | /* Receive interrupt */ | |
317 | btuart_receive(info); | |
318 | break; | |
319 | case UART_IIR_THRI: | |
320 | if (lsr & UART_LSR_THRE) { | |
321 | /* Transmitter ready for data */ | |
322 | btuart_write_wakeup(info); | |
323 | } | |
324 | break; | |
325 | default: | |
326 | BT_ERR("Unhandled IIR=%#x", iir); | |
327 | break; | |
328 | } | |
329 | ||
330 | /* Make sure we don't stay here too long */ | |
331 | if (boguscount++ > 100) | |
332 | break; | |
333 | ||
334 | iir = inb(iobase + UART_IIR) & UART_IIR_ID; | |
335 | ||
336 | } | |
337 | ||
338 | spin_unlock(&(info->lock)); | |
339 | ||
aafcf998 | 340 | return r; |
1da177e4 LT |
341 | } |
342 | ||
343 | ||
344 | static void btuart_change_speed(btuart_info_t *info, 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 | ||
9a017a91 | 357 | iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
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 | ||
b92b1c57 | 388 | /* Turn on interrupts */ |
1da177e4 LT |
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 | btuart_info_t *info = (btuart_info_t *)(hdev->driver_data); | |
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 | set_bit(HCI_RUNNING, &(hdev->flags)); | |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
417 | ||
418 | static int btuart_hci_close(struct hci_dev *hdev) | |
419 | { | |
420 | if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags))) | |
421 | return 0; | |
422 | ||
423 | btuart_hci_flush(hdev); | |
424 | ||
425 | return 0; | |
426 | } | |
427 | ||
428 | ||
429 | static int btuart_hci_send_frame(struct sk_buff *skb) | |
430 | { | |
431 | btuart_info_t *info; | |
432 | struct hci_dev *hdev = (struct hci_dev *)(skb->dev); | |
433 | ||
434 | if (!hdev) { | |
435 | BT_ERR("Frame for unknown HCI device (hdev=NULL)"); | |
436 | return -ENODEV; | |
437 | } | |
438 | ||
439 | info = (btuart_info_t *)(hdev->driver_data); | |
440 | ||
0d48d939 | 441 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
442 | case HCI_COMMAND_PKT: |
443 | hdev->stat.cmd_tx++; | |
444 | break; | |
445 | case HCI_ACLDATA_PKT: | |
446 | hdev->stat.acl_tx++; | |
447 | break; | |
448 | case HCI_SCODATA_PKT: | |
449 | hdev->stat.sco_tx++; | |
450 | break; | |
451 | }; | |
452 | ||
453 | /* Prepend skb with frame type */ | |
0d48d939 | 454 | memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1); |
1da177e4 LT |
455 | skb_queue_tail(&(info->txq), skb); |
456 | ||
457 | btuart_write_wakeup(info); | |
458 | ||
459 | return 0; | |
460 | } | |
461 | ||
462 | ||
463 | static void btuart_hci_destruct(struct hci_dev *hdev) | |
464 | { | |
465 | } | |
466 | ||
467 | ||
468 | static int btuart_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg) | |
469 | { | |
470 | return -ENOIOCTLCMD; | |
471 | } | |
472 | ||
473 | ||
474 | ||
475 | /* ======================== Card services HCI interaction ======================== */ | |
476 | ||
477 | ||
478 | static int btuart_open(btuart_info_t *info) | |
479 | { | |
480 | unsigned long flags; | |
9a017a91 | 481 | unsigned int iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
482 | struct hci_dev *hdev; |
483 | ||
484 | spin_lock_init(&(info->lock)); | |
485 | ||
486 | skb_queue_head_init(&(info->txq)); | |
487 | ||
488 | info->rx_state = RECV_WAIT_PACKET_TYPE; | |
489 | info->rx_count = 0; | |
490 | info->rx_skb = NULL; | |
491 | ||
492 | /* Initialize HCI device */ | |
493 | hdev = hci_alloc_dev(); | |
494 | if (!hdev) { | |
495 | BT_ERR("Can't allocate HCI device"); | |
496 | return -ENOMEM; | |
497 | } | |
498 | ||
499 | info->hdev = hdev; | |
500 | ||
c13854ce | 501 | hdev->bus = HCI_PCCARD; |
1da177e4 | 502 | hdev->driver_data = info; |
27d35284 | 503 | SET_HCIDEV_DEV(hdev, &info->p_dev->dev); |
1da177e4 LT |
504 | |
505 | hdev->open = btuart_hci_open; | |
506 | hdev->close = btuart_hci_close; | |
507 | hdev->flush = btuart_hci_flush; | |
508 | hdev->send = btuart_hci_send_frame; | |
509 | hdev->destruct = btuart_hci_destruct; | |
510 | hdev->ioctl = btuart_hci_ioctl; | |
511 | ||
512 | hdev->owner = THIS_MODULE; | |
513 | ||
514 | spin_lock_irqsave(&(info->lock), flags); | |
515 | ||
516 | /* Reset UART */ | |
517 | outb(0, iobase + UART_MCR); | |
518 | ||
519 | /* Turn off interrupts */ | |
520 | outb(0, iobase + UART_IER); | |
521 | ||
522 | /* Initialize UART */ | |
523 | outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */ | |
524 | outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR); | |
525 | ||
526 | /* Turn on interrupts */ | |
527 | // outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER); | |
528 | ||
529 | spin_unlock_irqrestore(&(info->lock), flags); | |
530 | ||
531 | btuart_change_speed(info, DEFAULT_BAUD_RATE); | |
532 | ||
533 | /* Timeout before it is safe to send the first HCI packet */ | |
534 | msleep(1000); | |
535 | ||
536 | /* Register HCI device */ | |
537 | if (hci_register_dev(hdev) < 0) { | |
538 | BT_ERR("Can't register HCI device"); | |
539 | info->hdev = NULL; | |
540 | hci_free_dev(hdev); | |
541 | return -ENODEV; | |
542 | } | |
543 | ||
544 | return 0; | |
545 | } | |
546 | ||
547 | ||
548 | static int btuart_close(btuart_info_t *info) | |
549 | { | |
550 | unsigned long flags; | |
9a017a91 | 551 | unsigned int iobase = info->p_dev->resource[0]->start; |
1da177e4 LT |
552 | struct hci_dev *hdev = info->hdev; |
553 | ||
554 | if (!hdev) | |
555 | return -ENODEV; | |
556 | ||
557 | btuart_hci_close(hdev); | |
558 | ||
559 | spin_lock_irqsave(&(info->lock), flags); | |
560 | ||
561 | /* Reset UART */ | |
562 | outb(0, iobase + UART_MCR); | |
563 | ||
564 | /* Turn off interrupts */ | |
565 | outb(0, iobase + UART_IER); | |
566 | ||
567 | spin_unlock_irqrestore(&(info->lock), flags); | |
568 | ||
569 | if (hci_unregister_dev(hdev) < 0) | |
570 | BT_ERR("Can't unregister HCI device %s", hdev->name); | |
571 | ||
572 | hci_free_dev(hdev); | |
573 | ||
574 | return 0; | |
575 | } | |
576 | ||
15b99ac1 | 577 | static int btuart_probe(struct pcmcia_device *link) |
1da177e4 LT |
578 | { |
579 | btuart_info_t *info; | |
1da177e4 LT |
580 | |
581 | /* Create new info device */ | |
089b1dbb | 582 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 | 583 | if (!info) |
f8cfa618 | 584 | return -ENOMEM; |
1da177e4 | 585 | |
fba395ee | 586 | info->p_dev = link; |
1da177e4 LT |
587 | link->priv = info; |
588 | ||
90abdc3b DB |
589 | link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; |
590 | link->resource[0]->end = 8; | |
1da177e4 LT |
591 | |
592 | link->conf.Attributes = CONF_ENABLE_IRQ; | |
1da177e4 LT |
593 | link->conf.IntType = INT_MEMORY_AND_IO; |
594 | ||
15b99ac1 | 595 | return btuart_config(link); |
1da177e4 LT |
596 | } |
597 | ||
598 | ||
fba395ee | 599 | static void btuart_detach(struct pcmcia_device *link) |
1da177e4 LT |
600 | { |
601 | btuart_info_t *info = link->priv; | |
1da177e4 | 602 | |
e2d40963 | 603 | btuart_release(link); |
1da177e4 LT |
604 | kfree(info); |
605 | } | |
606 | ||
ed58872a DB |
607 | static int btuart_check_config(struct pcmcia_device *p_dev, |
608 | cistpl_cftable_entry_t *cf, | |
8e2fc39d | 609 | cistpl_cftable_entry_t *dflt, |
ad913c11 | 610 | unsigned int vcc, |
ed58872a | 611 | void *priv_data) |
1da177e4 | 612 | { |
ad913c11 | 613 | int *try = priv_data; |
ed58872a | 614 | |
90abdc3b DB |
615 | p_dev->io_lines = (try == 0) ? 16 : cf->io.flags & CISTPL_IO_LINES_MASK; |
616 | ||
ed58872a DB |
617 | if (cf->vpp1.present & (1 << CISTPL_POWER_VNOM)) |
618 | p_dev->conf.Vpp = cf->vpp1.param[CISTPL_POWER_VNOM] / 10000; | |
619 | if ((cf->io.nwin > 0) && (cf->io.win[0].len == 8) && | |
620 | (cf->io.win[0].base != 0)) { | |
90abdc3b DB |
621 | p_dev->resource[0]->start = cf->io.win[0].base; |
622 | if (!pcmcia_request_io(p_dev)) | |
ed58872a DB |
623 | return 0; |
624 | } | |
625 | return -ENODEV; | |
1da177e4 LT |
626 | } |
627 | ||
ed58872a DB |
628 | static int btuart_check_config_notpicky(struct pcmcia_device *p_dev, |
629 | cistpl_cftable_entry_t *cf, | |
8e2fc39d | 630 | cistpl_cftable_entry_t *dflt, |
ad913c11 | 631 | unsigned int vcc, |
ed58872a | 632 | void *priv_data) |
1da177e4 | 633 | { |
ed58872a DB |
634 | static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 }; |
635 | int j; | |
636 | ||
637 | if ((cf->io.nwin > 0) && ((cf->io.flags & CISTPL_IO_LINES_MASK) <= 3)) { | |
ed58872a | 638 | for (j = 0; j < 5; j++) { |
90abdc3b DB |
639 | p_dev->resource[0]->start = base[j]; |
640 | p_dev->io_lines = base[j] ? 16 : 3; | |
641 | if (!pcmcia_request_io(p_dev)) | |
ed58872a DB |
642 | return 0; |
643 | } | |
644 | } | |
645 | return -ENODEV; | |
1da177e4 LT |
646 | } |
647 | ||
15b99ac1 | 648 | static int btuart_config(struct pcmcia_device *link) |
1da177e4 | 649 | { |
1da177e4 | 650 | btuart_info_t *info = link->priv; |
ed58872a | 651 | int i; |
ad913c11 | 652 | int try; |
ed58872a DB |
653 | |
654 | /* First pass: look for a config entry that looks normal. | |
655 | Two tries: without IO aliases, then with aliases */ | |
656 | for (try = 0; try < 2; try++) | |
ad913c11 | 657 | if (!pcmcia_loop_config(link, btuart_check_config, &try)) |
ed58872a | 658 | goto found_port; |
1da177e4 LT |
659 | |
660 | /* Second pass: try to find an entry that isn't picky about | |
661 | its base address, then try to grab any standard serial port | |
662 | address, and finally try to get any free port. */ | |
ed58872a DB |
663 | if (!pcmcia_loop_config(link, btuart_check_config_notpicky, NULL)) |
664 | goto found_port; | |
1da177e4 | 665 | |
ed58872a | 666 | BT_ERR("No usable port range found"); |
ed58872a | 667 | goto failed; |
1da177e4 | 668 | |
ed58872a | 669 | found_port: |
eb14120f | 670 | i = pcmcia_request_irq(link, btuart_interrupt); |
9ac3e58c | 671 | if (i != 0) |
eb14120f | 672 | goto failed; |
1da177e4 | 673 | |
fba395ee | 674 | i = pcmcia_request_configuration(link, &link->conf); |
9ac3e58c | 675 | if (i != 0) |
1da177e4 | 676 | goto failed; |
1da177e4 LT |
677 | |
678 | if (btuart_open(info) != 0) | |
679 | goto failed; | |
680 | ||
15b99ac1 | 681 | return 0; |
1da177e4 | 682 | |
1da177e4 LT |
683 | failed: |
684 | btuart_release(link); | |
15b99ac1 | 685 | return -ENODEV; |
1da177e4 LT |
686 | } |
687 | ||
688 | ||
fba395ee | 689 | static void btuart_release(struct pcmcia_device *link) |
1da177e4 LT |
690 | { |
691 | btuart_info_t *info = link->priv; | |
692 | ||
e2d40963 | 693 | btuart_close(info); |
1da177e4 | 694 | |
fba395ee | 695 | pcmcia_disable_device(link); |
1da177e4 LT |
696 | } |
697 | ||
279c9361 DB |
698 | static struct pcmcia_device_id btuart_ids[] = { |
699 | /* don't use this driver. Use serial_cs + hci_uart instead */ | |
700 | PCMCIA_DEVICE_NULL | |
701 | }; | |
702 | MODULE_DEVICE_TABLE(pcmcia, btuart_ids); | |
703 | ||
1da177e4 LT |
704 | static struct pcmcia_driver btuart_driver = { |
705 | .owner = THIS_MODULE, | |
706 | .drv = { | |
707 | .name = "btuart_cs", | |
708 | }, | |
15b99ac1 | 709 | .probe = btuart_probe, |
cc3b4866 | 710 | .remove = btuart_detach, |
279c9361 | 711 | .id_table = btuart_ids, |
1da177e4 LT |
712 | }; |
713 | ||
714 | static int __init init_btuart_cs(void) | |
715 | { | |
716 | return pcmcia_register_driver(&btuart_driver); | |
717 | } | |
718 | ||
719 | ||
720 | static void __exit exit_btuart_cs(void) | |
721 | { | |
722 | pcmcia_unregister_driver(&btuart_driver); | |
1da177e4 LT |
723 | } |
724 | ||
725 | module_init(init_btuart_cs); | |
726 | module_exit(exit_btuart_cs); |