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 | dev_node_t node; |
71 | ||
72 | struct hci_dev *hdev; | |
73 | ||
74 | spinlock_t lock; /* For serializing operations */ | |
75 | ||
76 | struct sk_buff_head txq; | |
77 | unsigned long tx_state; | |
78 | ||
79 | unsigned long rx_state; | |
80 | unsigned long rx_count; | |
81 | struct sk_buff *rx_skb; | |
82 | } btuart_info_t; | |
83 | ||
84 | ||
15b99ac1 | 85 | static int btuart_config(struct pcmcia_device *link); |
fba395ee | 86 | static void btuart_release(struct pcmcia_device *link); |
1da177e4 | 87 | |
cc3b4866 | 88 | static void btuart_detach(struct pcmcia_device *p_dev); |
1da177e4 | 89 | |
1da177e4 LT |
90 | |
91 | /* Maximum baud rate */ | |
92 | #define SPEED_MAX 115200 | |
93 | ||
94 | /* Default baud rate: 57600, 115200, 230400 or 460800 */ | |
95 | #define DEFAULT_BAUD_RATE 115200 | |
96 | ||
97 | ||
98 | /* Transmit states */ | |
99 | #define XMIT_SENDING 1 | |
100 | #define XMIT_WAKEUP 2 | |
101 | #define XMIT_WAITING 8 | |
102 | ||
103 | /* Receiver states */ | |
104 | #define RECV_WAIT_PACKET_TYPE 0 | |
105 | #define RECV_WAIT_EVENT_HEADER 1 | |
106 | #define RECV_WAIT_ACL_HEADER 2 | |
107 | #define RECV_WAIT_SCO_HEADER 3 | |
108 | #define RECV_WAIT_DATA 4 | |
109 | ||
110 | ||
111 | ||
112 | /* ======================== Interrupt handling ======================== */ | |
113 | ||
114 | ||
115 | static int btuart_write(unsigned int iobase, int fifo_size, __u8 *buf, int len) | |
116 | { | |
117 | int actual = 0; | |
118 | ||
119 | /* Tx FIFO should be empty */ | |
120 | if (!(inb(iobase + UART_LSR) & UART_LSR_THRE)) | |
121 | return 0; | |
122 | ||
123 | /* Fill FIFO with current frame */ | |
124 | while ((fifo_size-- > 0) && (actual < len)) { | |
125 | /* Transmit next byte */ | |
126 | outb(buf[actual], iobase + UART_TX); | |
127 | actual++; | |
128 | } | |
129 | ||
130 | return actual; | |
131 | } | |
132 | ||
133 | ||
134 | static void btuart_write_wakeup(btuart_info_t *info) | |
135 | { | |
136 | if (!info) { | |
137 | BT_ERR("Unknown device"); | |
138 | return; | |
139 | } | |
140 | ||
141 | if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) { | |
142 | set_bit(XMIT_WAKEUP, &(info->tx_state)); | |
143 | return; | |
144 | } | |
145 | ||
146 | do { | |
fd238232 | 147 | register unsigned int iobase = info->p_dev->io.BasePort1; |
1da177e4 LT |
148 | register struct sk_buff *skb; |
149 | register int len; | |
150 | ||
151 | clear_bit(XMIT_WAKEUP, &(info->tx_state)); | |
152 | ||
e2d40963 | 153 | if (!pcmcia_dev_present(info->p_dev)) |
1da177e4 LT |
154 | return; |
155 | ||
156 | if (!(skb = skb_dequeue(&(info->txq)))) | |
157 | break; | |
158 | ||
159 | /* Send frame */ | |
160 | len = btuart_write(iobase, 16, skb->data, skb->len); | |
161 | set_bit(XMIT_WAKEUP, &(info->tx_state)); | |
162 | ||
163 | if (len == skb->len) { | |
164 | kfree_skb(skb); | |
165 | } else { | |
166 | skb_pull(skb, len); | |
167 | skb_queue_head(&(info->txq), skb); | |
168 | } | |
169 | ||
170 | info->hdev->stat.byte_tx += len; | |
171 | ||
172 | } while (test_bit(XMIT_WAKEUP, &(info->tx_state))); | |
173 | ||
174 | clear_bit(XMIT_SENDING, &(info->tx_state)); | |
175 | } | |
176 | ||
177 | ||
178 | static void btuart_receive(btuart_info_t *info) | |
179 | { | |
180 | unsigned int iobase; | |
181 | int boguscount = 0; | |
182 | ||
183 | if (!info) { | |
184 | BT_ERR("Unknown device"); | |
185 | return; | |
186 | } | |
187 | ||
fd238232 | 188 | iobase = info->p_dev->io.BasePort1; |
1da177e4 LT |
189 | |
190 | do { | |
191 | info->hdev->stat.byte_rx++; | |
192 | ||
193 | /* Allocate packet */ | |
194 | if (info->rx_skb == NULL) { | |
195 | info->rx_state = RECV_WAIT_PACKET_TYPE; | |
196 | info->rx_count = 0; | |
197 | if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) { | |
198 | BT_ERR("Can't allocate mem for new packet"); | |
199 | return; | |
200 | } | |
201 | } | |
202 | ||
203 | if (info->rx_state == RECV_WAIT_PACKET_TYPE) { | |
204 | ||
205 | info->rx_skb->dev = (void *) info->hdev; | |
0d48d939 | 206 | bt_cb(info->rx_skb)->pkt_type = inb(iobase + UART_RX); |
1da177e4 | 207 | |
0d48d939 | 208 | switch (bt_cb(info->rx_skb)->pkt_type) { |
1da177e4 LT |
209 | |
210 | case HCI_EVENT_PKT: | |
211 | info->rx_state = RECV_WAIT_EVENT_HEADER; | |
212 | info->rx_count = HCI_EVENT_HDR_SIZE; | |
213 | break; | |
214 | ||
215 | case HCI_ACLDATA_PKT: | |
216 | info->rx_state = RECV_WAIT_ACL_HEADER; | |
217 | info->rx_count = HCI_ACL_HDR_SIZE; | |
218 | break; | |
219 | ||
220 | case HCI_SCODATA_PKT: | |
221 | info->rx_state = RECV_WAIT_SCO_HEADER; | |
222 | info->rx_count = HCI_SCO_HDR_SIZE; | |
223 | break; | |
224 | ||
225 | default: | |
226 | /* Unknown packet */ | |
0d48d939 | 227 | BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type); |
1da177e4 LT |
228 | info->hdev->stat.err_rx++; |
229 | clear_bit(HCI_RUNNING, &(info->hdev->flags)); | |
230 | ||
231 | kfree_skb(info->rx_skb); | |
232 | info->rx_skb = NULL; | |
233 | break; | |
234 | ||
235 | } | |
236 | ||
237 | } else { | |
238 | ||
239 | *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX); | |
240 | info->rx_count--; | |
241 | ||
242 | if (info->rx_count == 0) { | |
243 | ||
244 | int dlen; | |
245 | struct hci_event_hdr *eh; | |
246 | struct hci_acl_hdr *ah; | |
247 | struct hci_sco_hdr *sh; | |
248 | ||
249 | ||
250 | switch (info->rx_state) { | |
251 | ||
252 | case RECV_WAIT_EVENT_HEADER: | |
2a123b86 | 253 | eh = hci_event_hdr(info->rx_skb); |
1da177e4 LT |
254 | info->rx_state = RECV_WAIT_DATA; |
255 | info->rx_count = eh->plen; | |
256 | break; | |
257 | ||
258 | case RECV_WAIT_ACL_HEADER: | |
2a123b86 | 259 | ah = hci_acl_hdr(info->rx_skb); |
1da177e4 LT |
260 | dlen = __le16_to_cpu(ah->dlen); |
261 | info->rx_state = RECV_WAIT_DATA; | |
262 | info->rx_count = dlen; | |
263 | break; | |
264 | ||
265 | case RECV_WAIT_SCO_HEADER: | |
2a123b86 | 266 | sh = hci_sco_hdr(info->rx_skb); |
1da177e4 LT |
267 | info->rx_state = RECV_WAIT_DATA; |
268 | info->rx_count = sh->dlen; | |
269 | break; | |
270 | ||
271 | case RECV_WAIT_DATA: | |
272 | hci_recv_frame(info->rx_skb); | |
273 | info->rx_skb = NULL; | |
274 | break; | |
275 | ||
276 | } | |
277 | ||
278 | } | |
279 | ||
280 | } | |
281 | ||
282 | /* Make sure we don't stay here too long */ | |
283 | if (boguscount++ > 16) | |
284 | break; | |
285 | ||
286 | } while (inb(iobase + UART_LSR) & UART_LSR_DR); | |
287 | } | |
288 | ||
289 | ||
7d12e780 | 290 | static irqreturn_t btuart_interrupt(int irq, void *dev_inst) |
1da177e4 LT |
291 | { |
292 | btuart_info_t *info = dev_inst; | |
293 | unsigned int iobase; | |
294 | int boguscount = 0; | |
295 | int iir, lsr; | |
aafcf998 | 296 | irqreturn_t r = IRQ_NONE; |
1da177e4 | 297 | |
ac019360 | 298 | BUG_ON(!info->hdev); |
1da177e4 | 299 | |
fd238232 | 300 | iobase = info->p_dev->io.BasePort1; |
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 | ||
fd238232 | 357 | iobase = info->p_dev->io.BasePort1; |
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; | |
fd238232 | 481 | unsigned int iobase = info->p_dev->io.BasePort1; |
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 | ||
501 | hdev->type = HCI_PCCARD; | |
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; | |
fd238232 | 551 | unsigned int iobase = info->p_dev->io.BasePort1; |
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 | ||
589 | link->io.Attributes1 = IO_DATA_PATH_WIDTH_8; | |
590 | link->io.NumPorts1 = 8; | |
aafcf998 | 591 | link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING | IRQ_HANDLE_PRESENT; |
1da177e4 LT |
592 | link->irq.IRQInfo1 = IRQ_LEVEL_ID; |
593 | ||
594 | link->irq.Handler = btuart_interrupt; | |
595 | link->irq.Instance = info; | |
596 | ||
597 | link->conf.Attributes = CONF_ENABLE_IRQ; | |
1da177e4 LT |
598 | link->conf.IntType = INT_MEMORY_AND_IO; |
599 | ||
15b99ac1 | 600 | return btuart_config(link); |
1da177e4 LT |
601 | } |
602 | ||
603 | ||
fba395ee | 604 | static void btuart_detach(struct pcmcia_device *link) |
1da177e4 LT |
605 | { |
606 | btuart_info_t *info = link->priv; | |
1da177e4 | 607 | |
e2d40963 | 608 | btuart_release(link); |
1da177e4 LT |
609 | kfree(info); |
610 | } | |
611 | ||
ed58872a DB |
612 | static int btuart_check_config(struct pcmcia_device *p_dev, |
613 | cistpl_cftable_entry_t *cf, | |
8e2fc39d | 614 | cistpl_cftable_entry_t *dflt, |
ad913c11 | 615 | unsigned int vcc, |
ed58872a | 616 | void *priv_data) |
1da177e4 | 617 | { |
ad913c11 | 618 | int *try = priv_data; |
ed58872a DB |
619 | |
620 | if (cf->vpp1.present & (1 << CISTPL_POWER_VNOM)) | |
621 | p_dev->conf.Vpp = cf->vpp1.param[CISTPL_POWER_VNOM] / 10000; | |
622 | if ((cf->io.nwin > 0) && (cf->io.win[0].len == 8) && | |
623 | (cf->io.win[0].base != 0)) { | |
ed58872a | 624 | p_dev->io.BasePort1 = cf->io.win[0].base; |
ad913c11 | 625 | p_dev->io.IOAddrLines = (*try == 0) ? 16 : |
ed58872a DB |
626 | cf->io.flags & CISTPL_IO_LINES_MASK; |
627 | if (!pcmcia_request_io(p_dev, &p_dev->io)) | |
628 | return 0; | |
629 | } | |
630 | return -ENODEV; | |
1da177e4 LT |
631 | } |
632 | ||
ed58872a DB |
633 | static int btuart_check_config_notpicky(struct pcmcia_device *p_dev, |
634 | cistpl_cftable_entry_t *cf, | |
8e2fc39d | 635 | cistpl_cftable_entry_t *dflt, |
ad913c11 | 636 | unsigned int vcc, |
ed58872a | 637 | void *priv_data) |
1da177e4 | 638 | { |
ed58872a DB |
639 | static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 }; |
640 | int j; | |
641 | ||
642 | if ((cf->io.nwin > 0) && ((cf->io.flags & CISTPL_IO_LINES_MASK) <= 3)) { | |
ed58872a DB |
643 | for (j = 0; j < 5; j++) { |
644 | p_dev->io.BasePort1 = base[j]; | |
645 | p_dev->io.IOAddrLines = base[j] ? 16 : 3; | |
646 | if (!pcmcia_request_io(p_dev, &p_dev->io)) | |
647 | return 0; | |
648 | } | |
649 | } | |
650 | return -ENODEV; | |
1da177e4 LT |
651 | } |
652 | ||
15b99ac1 | 653 | static int btuart_config(struct pcmcia_device *link) |
1da177e4 | 654 | { |
1da177e4 | 655 | btuart_info_t *info = link->priv; |
ed58872a | 656 | int i; |
ad913c11 | 657 | int try; |
ed58872a DB |
658 | |
659 | /* First pass: look for a config entry that looks normal. | |
660 | Two tries: without IO aliases, then with aliases */ | |
661 | for (try = 0; try < 2; try++) | |
ad913c11 | 662 | if (!pcmcia_loop_config(link, btuart_check_config, &try)) |
ed58872a | 663 | goto found_port; |
1da177e4 LT |
664 | |
665 | /* Second pass: try to find an entry that isn't picky about | |
666 | its base address, then try to grab any standard serial port | |
667 | address, and finally try to get any free port. */ | |
ed58872a DB |
668 | if (!pcmcia_loop_config(link, btuart_check_config_notpicky, NULL)) |
669 | goto found_port; | |
1da177e4 | 670 | |
ed58872a DB |
671 | BT_ERR("No usable port range found"); |
672 | cs_error(link, RequestIO, -ENODEV); | |
673 | goto failed; | |
1da177e4 | 674 | |
ed58872a | 675 | found_port: |
fba395ee | 676 | i = pcmcia_request_irq(link, &link->irq); |
4c89e88b | 677 | if (i != 0) { |
fba395ee | 678 | cs_error(link, RequestIRQ, i); |
1da177e4 LT |
679 | link->irq.AssignedIRQ = 0; |
680 | } | |
681 | ||
fba395ee | 682 | i = pcmcia_request_configuration(link, &link->conf); |
4c89e88b | 683 | if (i != 0) { |
fba395ee | 684 | cs_error(link, RequestConfiguration, i); |
1da177e4 LT |
685 | goto failed; |
686 | } | |
687 | ||
688 | if (btuart_open(info) != 0) | |
689 | goto failed; | |
690 | ||
691 | strcpy(info->node.dev_name, info->hdev->name); | |
fd238232 | 692 | link->dev_node = &info->node; |
1da177e4 | 693 | |
15b99ac1 | 694 | return 0; |
1da177e4 | 695 | |
1da177e4 LT |
696 | failed: |
697 | btuart_release(link); | |
15b99ac1 | 698 | return -ENODEV; |
1da177e4 LT |
699 | } |
700 | ||
701 | ||
fba395ee | 702 | static void btuart_release(struct pcmcia_device *link) |
1da177e4 LT |
703 | { |
704 | btuart_info_t *info = link->priv; | |
705 | ||
e2d40963 | 706 | btuart_close(info); |
1da177e4 | 707 | |
fba395ee | 708 | pcmcia_disable_device(link); |
1da177e4 LT |
709 | } |
710 | ||
279c9361 DB |
711 | static struct pcmcia_device_id btuart_ids[] = { |
712 | /* don't use this driver. Use serial_cs + hci_uart instead */ | |
713 | PCMCIA_DEVICE_NULL | |
714 | }; | |
715 | MODULE_DEVICE_TABLE(pcmcia, btuart_ids); | |
716 | ||
1da177e4 LT |
717 | static struct pcmcia_driver btuart_driver = { |
718 | .owner = THIS_MODULE, | |
719 | .drv = { | |
720 | .name = "btuart_cs", | |
721 | }, | |
15b99ac1 | 722 | .probe = btuart_probe, |
cc3b4866 | 723 | .remove = btuart_detach, |
279c9361 | 724 | .id_table = btuart_ids, |
1da177e4 LT |
725 | }; |
726 | ||
727 | static int __init init_btuart_cs(void) | |
728 | { | |
729 | return pcmcia_register_driver(&btuart_driver); | |
730 | } | |
731 | ||
732 | ||
733 | static void __exit exit_btuart_cs(void) | |
734 | { | |
735 | pcmcia_unregister_driver(&btuart_driver); | |
1da177e4 LT |
736 | } |
737 | ||
738 | module_init(init_btuart_cs); | |
739 | module_exit(exit_btuart_cs); |