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_types.h> |
45 | #include <pcmcia/cs.h> | |
46 | #include <pcmcia/cistpl.h> | |
47 | #include <pcmcia/ciscode.h> | |
48 | #include <pcmcia/ds.h> | |
49 | #include <pcmcia/cisreg.h> | |
50 | ||
51 | #include <net/bluetooth/bluetooth.h> | |
52 | #include <net/bluetooth/hci_core.h> | |
53 | ||
54 | ||
55 | ||
56 | /* ======================== Module parameters ======================== */ | |
57 | ||
58 | ||
59 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); | |
60 | MODULE_DESCRIPTION("Bluetooth driver for Bluetooth PCMCIA cards with HCI UART interface"); | |
61 | MODULE_LICENSE("GPL"); | |
62 | ||
63 | ||
64 | ||
65 | /* ======================== Local structures ======================== */ | |
66 | ||
67 | ||
68 | typedef struct btuart_info_t { | |
fd238232 | 69 | struct pcmcia_device *p_dev; |
1da177e4 LT |
70 | |
71 | struct hci_dev *hdev; | |
72 | ||
73 | spinlock_t lock; /* For serializing operations */ | |
74 | ||
75 | struct sk_buff_head txq; | |
76 | unsigned long tx_state; | |
77 | ||
78 | unsigned long rx_state; | |
79 | unsigned long rx_count; | |
80 | struct sk_buff *rx_skb; | |
81 | } btuart_info_t; | |
82 | ||
83 | ||
15b99ac1 | 84 | static int btuart_config(struct pcmcia_device *link); |
fba395ee | 85 | static void btuart_release(struct pcmcia_device *link); |
1da177e4 | 86 | |
cc3b4866 | 87 | static void btuart_detach(struct pcmcia_device *p_dev); |
1da177e4 | 88 | |
1da177e4 LT |
89 | |
90 | /* Maximum baud rate */ | |
91 | #define SPEED_MAX 115200 | |
92 | ||
93 | /* Default baud rate: 57600, 115200, 230400 or 460800 */ | |
94 | #define DEFAULT_BAUD_RATE 115200 | |
95 | ||
96 | ||
97 | /* Transmit states */ | |
98 | #define XMIT_SENDING 1 | |
99 | #define XMIT_WAKEUP 2 | |
100 | #define XMIT_WAITING 8 | |
101 | ||
102 | /* Receiver states */ | |
103 | #define RECV_WAIT_PACKET_TYPE 0 | |
104 | #define RECV_WAIT_EVENT_HEADER 1 | |
105 | #define RECV_WAIT_ACL_HEADER 2 | |
106 | #define RECV_WAIT_SCO_HEADER 3 | |
107 | #define RECV_WAIT_DATA 4 | |
108 | ||
109 | ||
110 | ||
111 | /* ======================== Interrupt handling ======================== */ | |
112 | ||
113 | ||
114 | static int btuart_write(unsigned int iobase, int fifo_size, __u8 *buf, int len) | |
115 | { | |
116 | int actual = 0; | |
117 | ||
118 | /* Tx FIFO should be empty */ | |
119 | if (!(inb(iobase + UART_LSR) & UART_LSR_THRE)) | |
120 | return 0; | |
121 | ||
122 | /* Fill FIFO with current frame */ | |
123 | while ((fifo_size-- > 0) && (actual < len)) { | |
124 | /* Transmit next byte */ | |
125 | outb(buf[actual], iobase + UART_TX); | |
126 | actual++; | |
127 | } | |
128 | ||
129 | return actual; | |
130 | } | |
131 | ||
132 | ||
133 | static void btuart_write_wakeup(btuart_info_t *info) | |
134 | { | |
135 | if (!info) { | |
136 | BT_ERR("Unknown device"); | |
137 | return; | |
138 | } | |
139 | ||
140 | if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) { | |
141 | set_bit(XMIT_WAKEUP, &(info->tx_state)); | |
142 | return; | |
143 | } | |
144 | ||
145 | do { | |
fd238232 | 146 | register unsigned int iobase = info->p_dev->io.BasePort1; |
1da177e4 LT |
147 | register struct sk_buff *skb; |
148 | register int len; | |
149 | ||
150 | clear_bit(XMIT_WAKEUP, &(info->tx_state)); | |
151 | ||
e2d40963 | 152 | if (!pcmcia_dev_present(info->p_dev)) |
1da177e4 LT |
153 | return; |
154 | ||
155 | if (!(skb = skb_dequeue(&(info->txq)))) | |
156 | break; | |
157 | ||
158 | /* Send frame */ | |
159 | len = btuart_write(iobase, 16, skb->data, skb->len); | |
160 | set_bit(XMIT_WAKEUP, &(info->tx_state)); | |
161 | ||
162 | if (len == skb->len) { | |
163 | kfree_skb(skb); | |
164 | } else { | |
165 | skb_pull(skb, len); | |
166 | skb_queue_head(&(info->txq), skb); | |
167 | } | |
168 | ||
169 | info->hdev->stat.byte_tx += len; | |
170 | ||
171 | } while (test_bit(XMIT_WAKEUP, &(info->tx_state))); | |
172 | ||
173 | clear_bit(XMIT_SENDING, &(info->tx_state)); | |
174 | } | |
175 | ||
176 | ||
177 | static void btuart_receive(btuart_info_t *info) | |
178 | { | |
179 | unsigned int iobase; | |
180 | int boguscount = 0; | |
181 | ||
182 | if (!info) { | |
183 | BT_ERR("Unknown device"); | |
184 | return; | |
185 | } | |
186 | ||
fd238232 | 187 | iobase = info->p_dev->io.BasePort1; |
1da177e4 LT |
188 | |
189 | do { | |
190 | info->hdev->stat.byte_rx++; | |
191 | ||
192 | /* Allocate packet */ | |
193 | if (info->rx_skb == NULL) { | |
194 | info->rx_state = RECV_WAIT_PACKET_TYPE; | |
195 | info->rx_count = 0; | |
196 | if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) { | |
197 | BT_ERR("Can't allocate mem for new packet"); | |
198 | return; | |
199 | } | |
200 | } | |
201 | ||
202 | if (info->rx_state == RECV_WAIT_PACKET_TYPE) { | |
203 | ||
204 | info->rx_skb->dev = (void *) info->hdev; | |
0d48d939 | 205 | bt_cb(info->rx_skb)->pkt_type = inb(iobase + UART_RX); |
1da177e4 | 206 | |
0d48d939 | 207 | switch (bt_cb(info->rx_skb)->pkt_type) { |
1da177e4 LT |
208 | |
209 | case HCI_EVENT_PKT: | |
210 | info->rx_state = RECV_WAIT_EVENT_HEADER; | |
211 | info->rx_count = HCI_EVENT_HDR_SIZE; | |
212 | break; | |
213 | ||
214 | case HCI_ACLDATA_PKT: | |
215 | info->rx_state = RECV_WAIT_ACL_HEADER; | |
216 | info->rx_count = HCI_ACL_HDR_SIZE; | |
217 | break; | |
218 | ||
219 | case HCI_SCODATA_PKT: | |
220 | info->rx_state = RECV_WAIT_SCO_HEADER; | |
221 | info->rx_count = HCI_SCO_HDR_SIZE; | |
222 | break; | |
223 | ||
224 | default: | |
225 | /* Unknown packet */ | |
0d48d939 | 226 | BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type); |
1da177e4 LT |
227 | info->hdev->stat.err_rx++; |
228 | clear_bit(HCI_RUNNING, &(info->hdev->flags)); | |
229 | ||
230 | kfree_skb(info->rx_skb); | |
231 | info->rx_skb = NULL; | |
232 | break; | |
233 | ||
234 | } | |
235 | ||
236 | } else { | |
237 | ||
238 | *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX); | |
239 | info->rx_count--; | |
240 | ||
241 | if (info->rx_count == 0) { | |
242 | ||
243 | int dlen; | |
244 | struct hci_event_hdr *eh; | |
245 | struct hci_acl_hdr *ah; | |
246 | struct hci_sco_hdr *sh; | |
247 | ||
248 | ||
249 | switch (info->rx_state) { | |
250 | ||
251 | case RECV_WAIT_EVENT_HEADER: | |
2a123b86 | 252 | eh = hci_event_hdr(info->rx_skb); |
1da177e4 LT |
253 | info->rx_state = RECV_WAIT_DATA; |
254 | info->rx_count = eh->plen; | |
255 | break; | |
256 | ||
257 | case RECV_WAIT_ACL_HEADER: | |
2a123b86 | 258 | ah = hci_acl_hdr(info->rx_skb); |
1da177e4 LT |
259 | dlen = __le16_to_cpu(ah->dlen); |
260 | info->rx_state = RECV_WAIT_DATA; | |
261 | info->rx_count = dlen; | |
262 | break; | |
263 | ||
264 | case RECV_WAIT_SCO_HEADER: | |
2a123b86 | 265 | sh = hci_sco_hdr(info->rx_skb); |
1da177e4 LT |
266 | info->rx_state = RECV_WAIT_DATA; |
267 | info->rx_count = sh->dlen; | |
268 | break; | |
269 | ||
270 | case RECV_WAIT_DATA: | |
271 | hci_recv_frame(info->rx_skb); | |
272 | info->rx_skb = NULL; | |
273 | break; | |
274 | ||
275 | } | |
276 | ||
277 | } | |
278 | ||
279 | } | |
280 | ||
281 | /* Make sure we don't stay here too long */ | |
282 | if (boguscount++ > 16) | |
283 | break; | |
284 | ||
285 | } while (inb(iobase + UART_LSR) & UART_LSR_DR); | |
286 | } | |
287 | ||
288 | ||
7d12e780 | 289 | static irqreturn_t btuart_interrupt(int irq, void *dev_inst) |
1da177e4 LT |
290 | { |
291 | btuart_info_t *info = dev_inst; | |
292 | unsigned int iobase; | |
293 | int boguscount = 0; | |
294 | int iir, lsr; | |
aafcf998 | 295 | irqreturn_t r = IRQ_NONE; |
1da177e4 | 296 | |
7427847d MF |
297 | if (!info || !info->hdev) |
298 | /* our irq handler is shared */ | |
299 | return IRQ_NONE; | |
1da177e4 | 300 | |
fd238232 | 301 | iobase = info->p_dev->io.BasePort1; |
1da177e4 LT |
302 | |
303 | spin_lock(&(info->lock)); | |
304 | ||
305 | iir = inb(iobase + UART_IIR) & UART_IIR_ID; | |
306 | while (iir) { | |
aafcf998 | 307 | r = IRQ_HANDLED; |
1da177e4 LT |
308 | |
309 | /* Clear interrupt */ | |
310 | lsr = inb(iobase + UART_LSR); | |
311 | ||
312 | switch (iir) { | |
313 | case UART_IIR_RLSI: | |
314 | BT_ERR("RLSI"); | |
315 | break; | |
316 | case UART_IIR_RDI: | |
317 | /* Receive interrupt */ | |
318 | btuart_receive(info); | |
319 | break; | |
320 | case UART_IIR_THRI: | |
321 | if (lsr & UART_LSR_THRE) { | |
322 | /* Transmitter ready for data */ | |
323 | btuart_write_wakeup(info); | |
324 | } | |
325 | break; | |
326 | default: | |
327 | BT_ERR("Unhandled IIR=%#x", iir); | |
328 | break; | |
329 | } | |
330 | ||
331 | /* Make sure we don't stay here too long */ | |
332 | if (boguscount++ > 100) | |
333 | break; | |
334 | ||
335 | iir = inb(iobase + UART_IIR) & UART_IIR_ID; | |
336 | ||
337 | } | |
338 | ||
339 | spin_unlock(&(info->lock)); | |
340 | ||
aafcf998 | 341 | return r; |
1da177e4 LT |
342 | } |
343 | ||
344 | ||
345 | static void btuart_change_speed(btuart_info_t *info, unsigned int speed) | |
346 | { | |
347 | unsigned long flags; | |
348 | unsigned int iobase; | |
349 | int fcr; /* FIFO control reg */ | |
350 | int lcr; /* Line control reg */ | |
351 | int divisor; | |
352 | ||
353 | if (!info) { | |
354 | BT_ERR("Unknown device"); | |
355 | return; | |
356 | } | |
357 | ||
fd238232 | 358 | iobase = info->p_dev->io.BasePort1; |
1da177e4 LT |
359 | |
360 | spin_lock_irqsave(&(info->lock), flags); | |
361 | ||
362 | /* Turn off interrupts */ | |
363 | outb(0, iobase + UART_IER); | |
364 | ||
365 | divisor = SPEED_MAX / speed; | |
366 | ||
367 | fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT; | |
368 | ||
369 | /* | |
370 | * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and | |
371 | * almost 1,7 ms at 19200 bps. At speeds above that we can just forget | |
372 | * about this timeout since it will always be fast enough. | |
373 | */ | |
374 | ||
375 | if (speed < 38400) | |
376 | fcr |= UART_FCR_TRIGGER_1; | |
377 | else | |
378 | fcr |= UART_FCR_TRIGGER_14; | |
379 | ||
380 | /* Bluetooth cards use 8N1 */ | |
381 | lcr = UART_LCR_WLEN8; | |
382 | ||
383 | outb(UART_LCR_DLAB | lcr, iobase + UART_LCR); /* Set DLAB */ | |
384 | outb(divisor & 0xff, iobase + UART_DLL); /* Set speed */ | |
385 | outb(divisor >> 8, iobase + UART_DLM); | |
386 | outb(lcr, iobase + UART_LCR); /* Set 8N1 */ | |
387 | outb(fcr, iobase + UART_FCR); /* Enable FIFO's */ | |
388 | ||
b92b1c57 | 389 | /* Turn on interrupts */ |
1da177e4 LT |
390 | outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER); |
391 | ||
392 | spin_unlock_irqrestore(&(info->lock), flags); | |
393 | } | |
394 | ||
395 | ||
396 | ||
397 | /* ======================== HCI interface ======================== */ | |
398 | ||
399 | ||
400 | static int btuart_hci_flush(struct hci_dev *hdev) | |
401 | { | |
402 | btuart_info_t *info = (btuart_info_t *)(hdev->driver_data); | |
403 | ||
404 | /* Drop TX queue */ | |
405 | skb_queue_purge(&(info->txq)); | |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
410 | ||
411 | static int btuart_hci_open(struct hci_dev *hdev) | |
412 | { | |
413 | set_bit(HCI_RUNNING, &(hdev->flags)); | |
414 | ||
415 | return 0; | |
416 | } | |
417 | ||
418 | ||
419 | static int btuart_hci_close(struct hci_dev *hdev) | |
420 | { | |
421 | if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags))) | |
422 | return 0; | |
423 | ||
424 | btuart_hci_flush(hdev); | |
425 | ||
426 | return 0; | |
427 | } | |
428 | ||
429 | ||
430 | static int btuart_hci_send_frame(struct sk_buff *skb) | |
431 | { | |
432 | btuart_info_t *info; | |
433 | struct hci_dev *hdev = (struct hci_dev *)(skb->dev); | |
434 | ||
435 | if (!hdev) { | |
436 | BT_ERR("Frame for unknown HCI device (hdev=NULL)"); | |
437 | return -ENODEV; | |
438 | } | |
439 | ||
440 | info = (btuart_info_t *)(hdev->driver_data); | |
441 | ||
0d48d939 | 442 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
443 | case HCI_COMMAND_PKT: |
444 | hdev->stat.cmd_tx++; | |
445 | break; | |
446 | case HCI_ACLDATA_PKT: | |
447 | hdev->stat.acl_tx++; | |
448 | break; | |
449 | case HCI_SCODATA_PKT: | |
450 | hdev->stat.sco_tx++; | |
451 | break; | |
452 | }; | |
453 | ||
454 | /* Prepend skb with frame type */ | |
0d48d939 | 455 | memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1); |
1da177e4 LT |
456 | skb_queue_tail(&(info->txq), skb); |
457 | ||
458 | btuart_write_wakeup(info); | |
459 | ||
460 | return 0; | |
461 | } | |
462 | ||
463 | ||
464 | static void btuart_hci_destruct(struct hci_dev *hdev) | |
465 | { | |
466 | } | |
467 | ||
468 | ||
469 | static int btuart_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg) | |
470 | { | |
471 | return -ENOIOCTLCMD; | |
472 | } | |
473 | ||
474 | ||
475 | ||
476 | /* ======================== Card services HCI interaction ======================== */ | |
477 | ||
478 | ||
479 | static int btuart_open(btuart_info_t *info) | |
480 | { | |
481 | unsigned long flags; | |
fd238232 | 482 | unsigned int iobase = info->p_dev->io.BasePort1; |
1da177e4 LT |
483 | struct hci_dev *hdev; |
484 | ||
485 | spin_lock_init(&(info->lock)); | |
486 | ||
487 | skb_queue_head_init(&(info->txq)); | |
488 | ||
489 | info->rx_state = RECV_WAIT_PACKET_TYPE; | |
490 | info->rx_count = 0; | |
491 | info->rx_skb = NULL; | |
492 | ||
493 | /* Initialize HCI device */ | |
494 | hdev = hci_alloc_dev(); | |
495 | if (!hdev) { | |
496 | BT_ERR("Can't allocate HCI device"); | |
497 | return -ENOMEM; | |
498 | } | |
499 | ||
500 | info->hdev = hdev; | |
501 | ||
c13854ce | 502 | hdev->bus = HCI_PCCARD; |
1da177e4 | 503 | hdev->driver_data = info; |
27d35284 | 504 | SET_HCIDEV_DEV(hdev, &info->p_dev->dev); |
1da177e4 LT |
505 | |
506 | hdev->open = btuart_hci_open; | |
507 | hdev->close = btuart_hci_close; | |
508 | hdev->flush = btuart_hci_flush; | |
509 | hdev->send = btuart_hci_send_frame; | |
510 | hdev->destruct = btuart_hci_destruct; | |
511 | hdev->ioctl = btuart_hci_ioctl; | |
512 | ||
513 | hdev->owner = THIS_MODULE; | |
514 | ||
515 | spin_lock_irqsave(&(info->lock), flags); | |
516 | ||
517 | /* Reset UART */ | |
518 | outb(0, iobase + UART_MCR); | |
519 | ||
520 | /* Turn off interrupts */ | |
521 | outb(0, iobase + UART_IER); | |
522 | ||
523 | /* Initialize UART */ | |
524 | outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */ | |
525 | outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR); | |
526 | ||
527 | /* Turn on interrupts */ | |
528 | // outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER); | |
529 | ||
530 | spin_unlock_irqrestore(&(info->lock), flags); | |
531 | ||
532 | btuart_change_speed(info, DEFAULT_BAUD_RATE); | |
533 | ||
534 | /* Timeout before it is safe to send the first HCI packet */ | |
535 | msleep(1000); | |
536 | ||
537 | /* Register HCI device */ | |
538 | if (hci_register_dev(hdev) < 0) { | |
539 | BT_ERR("Can't register HCI device"); | |
540 | info->hdev = NULL; | |
541 | hci_free_dev(hdev); | |
542 | return -ENODEV; | |
543 | } | |
544 | ||
545 | return 0; | |
546 | } | |
547 | ||
548 | ||
549 | static int btuart_close(btuart_info_t *info) | |
550 | { | |
551 | unsigned long flags; | |
fd238232 | 552 | unsigned int iobase = info->p_dev->io.BasePort1; |
1da177e4 LT |
553 | struct hci_dev *hdev = info->hdev; |
554 | ||
555 | if (!hdev) | |
556 | return -ENODEV; | |
557 | ||
558 | btuart_hci_close(hdev); | |
559 | ||
560 | spin_lock_irqsave(&(info->lock), flags); | |
561 | ||
562 | /* Reset UART */ | |
563 | outb(0, iobase + UART_MCR); | |
564 | ||
565 | /* Turn off interrupts */ | |
566 | outb(0, iobase + UART_IER); | |
567 | ||
568 | spin_unlock_irqrestore(&(info->lock), flags); | |
569 | ||
570 | if (hci_unregister_dev(hdev) < 0) | |
571 | BT_ERR("Can't unregister HCI device %s", hdev->name); | |
572 | ||
573 | hci_free_dev(hdev); | |
574 | ||
575 | return 0; | |
576 | } | |
577 | ||
15b99ac1 | 578 | static int btuart_probe(struct pcmcia_device *link) |
1da177e4 LT |
579 | { |
580 | btuart_info_t *info; | |
1da177e4 LT |
581 | |
582 | /* Create new info device */ | |
089b1dbb | 583 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 | 584 | if (!info) |
f8cfa618 | 585 | return -ENOMEM; |
1da177e4 | 586 | |
fba395ee | 587 | info->p_dev = link; |
1da177e4 LT |
588 | link->priv = info; |
589 | ||
590 | link->io.Attributes1 = IO_DATA_PATH_WIDTH_8; | |
591 | link->io.NumPorts1 = 8; | |
1da177e4 LT |
592 | |
593 | link->conf.Attributes = CONF_ENABLE_IRQ; | |
1da177e4 LT |
594 | link->conf.IntType = INT_MEMORY_AND_IO; |
595 | ||
15b99ac1 | 596 | return btuart_config(link); |
1da177e4 LT |
597 | } |
598 | ||
599 | ||
fba395ee | 600 | static void btuart_detach(struct pcmcia_device *link) |
1da177e4 LT |
601 | { |
602 | btuart_info_t *info = link->priv; | |
1da177e4 | 603 | |
e2d40963 | 604 | btuart_release(link); |
1da177e4 LT |
605 | kfree(info); |
606 | } | |
607 | ||
ed58872a DB |
608 | static int btuart_check_config(struct pcmcia_device *p_dev, |
609 | cistpl_cftable_entry_t *cf, | |
8e2fc39d | 610 | cistpl_cftable_entry_t *dflt, |
ad913c11 | 611 | unsigned int vcc, |
ed58872a | 612 | void *priv_data) |
1da177e4 | 613 | { |
ad913c11 | 614 | int *try = priv_data; |
ed58872a DB |
615 | |
616 | if (cf->vpp1.present & (1 << CISTPL_POWER_VNOM)) | |
617 | p_dev->conf.Vpp = cf->vpp1.param[CISTPL_POWER_VNOM] / 10000; | |
618 | if ((cf->io.nwin > 0) && (cf->io.win[0].len == 8) && | |
619 | (cf->io.win[0].base != 0)) { | |
ed58872a | 620 | p_dev->io.BasePort1 = cf->io.win[0].base; |
ad913c11 | 621 | p_dev->io.IOAddrLines = (*try == 0) ? 16 : |
ed58872a DB |
622 | cf->io.flags & CISTPL_IO_LINES_MASK; |
623 | if (!pcmcia_request_io(p_dev, &p_dev->io)) | |
624 | return 0; | |
625 | } | |
626 | return -ENODEV; | |
1da177e4 LT |
627 | } |
628 | ||
ed58872a DB |
629 | static int btuart_check_config_notpicky(struct pcmcia_device *p_dev, |
630 | cistpl_cftable_entry_t *cf, | |
8e2fc39d | 631 | cistpl_cftable_entry_t *dflt, |
ad913c11 | 632 | unsigned int vcc, |
ed58872a | 633 | void *priv_data) |
1da177e4 | 634 | { |
ed58872a DB |
635 | static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 }; |
636 | int j; | |
637 | ||
638 | if ((cf->io.nwin > 0) && ((cf->io.flags & CISTPL_IO_LINES_MASK) <= 3)) { | |
ed58872a DB |
639 | for (j = 0; j < 5; j++) { |
640 | p_dev->io.BasePort1 = base[j]; | |
641 | p_dev->io.IOAddrLines = base[j] ? 16 : 3; | |
642 | if (!pcmcia_request_io(p_dev, &p_dev->io)) | |
643 | return 0; | |
644 | } | |
645 | } | |
646 | return -ENODEV; | |
1da177e4 LT |
647 | } |
648 | ||
15b99ac1 | 649 | static int btuart_config(struct pcmcia_device *link) |
1da177e4 | 650 | { |
1da177e4 | 651 | btuart_info_t *info = link->priv; |
ed58872a | 652 | int i; |
ad913c11 | 653 | int try; |
ed58872a DB |
654 | |
655 | /* First pass: look for a config entry that looks normal. | |
656 | Two tries: without IO aliases, then with aliases */ | |
657 | for (try = 0; try < 2; try++) | |
ad913c11 | 658 | if (!pcmcia_loop_config(link, btuart_check_config, &try)) |
ed58872a | 659 | goto found_port; |
1da177e4 LT |
660 | |
661 | /* Second pass: try to find an entry that isn't picky about | |
662 | its base address, then try to grab any standard serial port | |
663 | address, and finally try to get any free port. */ | |
ed58872a DB |
664 | if (!pcmcia_loop_config(link, btuart_check_config_notpicky, NULL)) |
665 | goto found_port; | |
1da177e4 | 666 | |
ed58872a | 667 | BT_ERR("No usable port range found"); |
ed58872a | 668 | goto failed; |
1da177e4 | 669 | |
ed58872a | 670 | found_port: |
eb14120f | 671 | i = pcmcia_request_irq(link, btuart_interrupt); |
9ac3e58c | 672 | if (i != 0) |
eb14120f | 673 | goto failed; |
1da177e4 | 674 | |
fba395ee | 675 | i = pcmcia_request_configuration(link, &link->conf); |
9ac3e58c | 676 | if (i != 0) |
1da177e4 | 677 | goto failed; |
1da177e4 LT |
678 | |
679 | if (btuart_open(info) != 0) | |
680 | goto failed; | |
681 | ||
15b99ac1 | 682 | return 0; |
1da177e4 | 683 | |
1da177e4 LT |
684 | failed: |
685 | btuart_release(link); | |
15b99ac1 | 686 | return -ENODEV; |
1da177e4 LT |
687 | } |
688 | ||
689 | ||
fba395ee | 690 | static void btuart_release(struct pcmcia_device *link) |
1da177e4 LT |
691 | { |
692 | btuart_info_t *info = link->priv; | |
693 | ||
e2d40963 | 694 | btuart_close(info); |
1da177e4 | 695 | |
fba395ee | 696 | pcmcia_disable_device(link); |
1da177e4 LT |
697 | } |
698 | ||
279c9361 DB |
699 | static struct pcmcia_device_id btuart_ids[] = { |
700 | /* don't use this driver. Use serial_cs + hci_uart instead */ | |
701 | PCMCIA_DEVICE_NULL | |
702 | }; | |
703 | MODULE_DEVICE_TABLE(pcmcia, btuart_ids); | |
704 | ||
1da177e4 LT |
705 | static struct pcmcia_driver btuart_driver = { |
706 | .owner = THIS_MODULE, | |
707 | .drv = { | |
708 | .name = "btuart_cs", | |
709 | }, | |
15b99ac1 | 710 | .probe = btuart_probe, |
cc3b4866 | 711 | .remove = btuart_detach, |
279c9361 | 712 | .id_table = btuart_ids, |
1da177e4 LT |
713 | }; |
714 | ||
715 | static int __init init_btuart_cs(void) | |
716 | { | |
717 | return pcmcia_register_driver(&btuart_driver); | |
718 | } | |
719 | ||
720 | ||
721 | static void __exit exit_btuart_cs(void) | |
722 | { | |
723 | pcmcia_unregister_driver(&btuart_driver); | |
1da177e4 LT |
724 | } |
725 | ||
726 | module_init(init_btuart_cs); | |
727 | module_exit(exit_btuart_cs); |