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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 | ||
23 | #include <linux/config.h> | |
24 | #include <linux/module.h> | |
25 | ||
26 | #include <linux/kernel.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/types.h> | |
30 | #include <linux/sched.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/errno.h> | |
33 | #include <linux/ptrace.h> | |
34 | #include <linux/ioport.h> | |
35 | #include <linux/spinlock.h> | |
36 | #include <linux/moduleparam.h> | |
37 | ||
38 | #include <linux/skbuff.h> | |
39 | #include <linux/string.h> | |
40 | #include <linux/serial.h> | |
41 | #include <linux/serial_reg.h> | |
42 | #include <linux/bitops.h> | |
43 | #include <asm/system.h> | |
44 | #include <asm/io.h> | |
45 | ||
1da177e4 LT |
46 | #include <pcmcia/cs_types.h> |
47 | #include <pcmcia/cs.h> | |
48 | #include <pcmcia/cistpl.h> | |
49 | #include <pcmcia/ciscode.h> | |
50 | #include <pcmcia/ds.h> | |
51 | #include <pcmcia/cisreg.h> | |
52 | ||
53 | #include <net/bluetooth/bluetooth.h> | |
54 | #include <net/bluetooth/hci_core.h> | |
55 | ||
56 | ||
57 | ||
58 | /* ======================== Module parameters ======================== */ | |
59 | ||
60 | ||
61 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); | |
62 | MODULE_DESCRIPTION("Bluetooth driver for Bluetooth PCMCIA cards with HCI UART interface"); | |
63 | MODULE_LICENSE("GPL"); | |
64 | ||
65 | ||
66 | ||
67 | /* ======================== Local structures ======================== */ | |
68 | ||
69 | ||
70 | typedef struct btuart_info_t { | |
fd238232 | 71 | struct pcmcia_device *p_dev; |
1da177e4 LT |
72 | dev_node_t node; |
73 | ||
74 | struct hci_dev *hdev; | |
75 | ||
76 | spinlock_t lock; /* For serializing operations */ | |
77 | ||
78 | struct sk_buff_head txq; | |
79 | unsigned long tx_state; | |
80 | ||
81 | unsigned long rx_state; | |
82 | unsigned long rx_count; | |
83 | struct sk_buff *rx_skb; | |
84 | } btuart_info_t; | |
85 | ||
86 | ||
fba395ee DB |
87 | static void btuart_config(struct pcmcia_device *link); |
88 | static void btuart_release(struct pcmcia_device *link); | |
1da177e4 | 89 | |
cc3b4866 | 90 | static void btuart_detach(struct pcmcia_device *p_dev); |
1da177e4 | 91 | |
1da177e4 LT |
92 | |
93 | /* Maximum baud rate */ | |
94 | #define SPEED_MAX 115200 | |
95 | ||
96 | /* Default baud rate: 57600, 115200, 230400 or 460800 */ | |
97 | #define DEFAULT_BAUD_RATE 115200 | |
98 | ||
99 | ||
100 | /* Transmit states */ | |
101 | #define XMIT_SENDING 1 | |
102 | #define XMIT_WAKEUP 2 | |
103 | #define XMIT_WAITING 8 | |
104 | ||
105 | /* Receiver states */ | |
106 | #define RECV_WAIT_PACKET_TYPE 0 | |
107 | #define RECV_WAIT_EVENT_HEADER 1 | |
108 | #define RECV_WAIT_ACL_HEADER 2 | |
109 | #define RECV_WAIT_SCO_HEADER 3 | |
110 | #define RECV_WAIT_DATA 4 | |
111 | ||
112 | ||
113 | ||
114 | /* ======================== Interrupt handling ======================== */ | |
115 | ||
116 | ||
117 | static int btuart_write(unsigned int iobase, int fifo_size, __u8 *buf, int len) | |
118 | { | |
119 | int actual = 0; | |
120 | ||
121 | /* Tx FIFO should be empty */ | |
122 | if (!(inb(iobase + UART_LSR) & UART_LSR_THRE)) | |
123 | return 0; | |
124 | ||
125 | /* Fill FIFO with current frame */ | |
126 | while ((fifo_size-- > 0) && (actual < len)) { | |
127 | /* Transmit next byte */ | |
128 | outb(buf[actual], iobase + UART_TX); | |
129 | actual++; | |
130 | } | |
131 | ||
132 | return actual; | |
133 | } | |
134 | ||
135 | ||
136 | static void btuart_write_wakeup(btuart_info_t *info) | |
137 | { | |
138 | if (!info) { | |
139 | BT_ERR("Unknown device"); | |
140 | return; | |
141 | } | |
142 | ||
143 | if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) { | |
144 | set_bit(XMIT_WAKEUP, &(info->tx_state)); | |
145 | return; | |
146 | } | |
147 | ||
148 | do { | |
fd238232 | 149 | register unsigned int iobase = info->p_dev->io.BasePort1; |
1da177e4 LT |
150 | register struct sk_buff *skb; |
151 | register int len; | |
152 | ||
153 | clear_bit(XMIT_WAKEUP, &(info->tx_state)); | |
154 | ||
fd238232 | 155 | if (!(info->p_dev->state & DEV_PRESENT)) |
1da177e4 LT |
156 | return; |
157 | ||
158 | if (!(skb = skb_dequeue(&(info->txq)))) | |
159 | break; | |
160 | ||
161 | /* Send frame */ | |
162 | len = btuart_write(iobase, 16, skb->data, skb->len); | |
163 | set_bit(XMIT_WAKEUP, &(info->tx_state)); | |
164 | ||
165 | if (len == skb->len) { | |
166 | kfree_skb(skb); | |
167 | } else { | |
168 | skb_pull(skb, len); | |
169 | skb_queue_head(&(info->txq), skb); | |
170 | } | |
171 | ||
172 | info->hdev->stat.byte_tx += len; | |
173 | ||
174 | } while (test_bit(XMIT_WAKEUP, &(info->tx_state))); | |
175 | ||
176 | clear_bit(XMIT_SENDING, &(info->tx_state)); | |
177 | } | |
178 | ||
179 | ||
180 | static void btuart_receive(btuart_info_t *info) | |
181 | { | |
182 | unsigned int iobase; | |
183 | int boguscount = 0; | |
184 | ||
185 | if (!info) { | |
186 | BT_ERR("Unknown device"); | |
187 | return; | |
188 | } | |
189 | ||
fd238232 | 190 | iobase = info->p_dev->io.BasePort1; |
1da177e4 LT |
191 | |
192 | do { | |
193 | info->hdev->stat.byte_rx++; | |
194 | ||
195 | /* Allocate packet */ | |
196 | if (info->rx_skb == NULL) { | |
197 | info->rx_state = RECV_WAIT_PACKET_TYPE; | |
198 | info->rx_count = 0; | |
199 | if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) { | |
200 | BT_ERR("Can't allocate mem for new packet"); | |
201 | return; | |
202 | } | |
203 | } | |
204 | ||
205 | if (info->rx_state == RECV_WAIT_PACKET_TYPE) { | |
206 | ||
207 | info->rx_skb->dev = (void *) info->hdev; | |
0d48d939 | 208 | bt_cb(info->rx_skb)->pkt_type = inb(iobase + UART_RX); |
1da177e4 | 209 | |
0d48d939 | 210 | switch (bt_cb(info->rx_skb)->pkt_type) { |
1da177e4 LT |
211 | |
212 | case HCI_EVENT_PKT: | |
213 | info->rx_state = RECV_WAIT_EVENT_HEADER; | |
214 | info->rx_count = HCI_EVENT_HDR_SIZE; | |
215 | break; | |
216 | ||
217 | case HCI_ACLDATA_PKT: | |
218 | info->rx_state = RECV_WAIT_ACL_HEADER; | |
219 | info->rx_count = HCI_ACL_HDR_SIZE; | |
220 | break; | |
221 | ||
222 | case HCI_SCODATA_PKT: | |
223 | info->rx_state = RECV_WAIT_SCO_HEADER; | |
224 | info->rx_count = HCI_SCO_HDR_SIZE; | |
225 | break; | |
226 | ||
227 | default: | |
228 | /* Unknown packet */ | |
0d48d939 | 229 | BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type); |
1da177e4 LT |
230 | info->hdev->stat.err_rx++; |
231 | clear_bit(HCI_RUNNING, &(info->hdev->flags)); | |
232 | ||
233 | kfree_skb(info->rx_skb); | |
234 | info->rx_skb = NULL; | |
235 | break; | |
236 | ||
237 | } | |
238 | ||
239 | } else { | |
240 | ||
241 | *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX); | |
242 | info->rx_count--; | |
243 | ||
244 | if (info->rx_count == 0) { | |
245 | ||
246 | int dlen; | |
247 | struct hci_event_hdr *eh; | |
248 | struct hci_acl_hdr *ah; | |
249 | struct hci_sco_hdr *sh; | |
250 | ||
251 | ||
252 | switch (info->rx_state) { | |
253 | ||
254 | case RECV_WAIT_EVENT_HEADER: | |
255 | eh = (struct hci_event_hdr *)(info->rx_skb->data); | |
256 | info->rx_state = RECV_WAIT_DATA; | |
257 | info->rx_count = eh->plen; | |
258 | break; | |
259 | ||
260 | case RECV_WAIT_ACL_HEADER: | |
261 | ah = (struct hci_acl_hdr *)(info->rx_skb->data); | |
262 | dlen = __le16_to_cpu(ah->dlen); | |
263 | info->rx_state = RECV_WAIT_DATA; | |
264 | info->rx_count = dlen; | |
265 | break; | |
266 | ||
267 | case RECV_WAIT_SCO_HEADER: | |
268 | sh = (struct hci_sco_hdr *)(info->rx_skb->data); | |
269 | info->rx_state = RECV_WAIT_DATA; | |
270 | info->rx_count = sh->dlen; | |
271 | break; | |
272 | ||
273 | case RECV_WAIT_DATA: | |
274 | hci_recv_frame(info->rx_skb); | |
275 | info->rx_skb = NULL; | |
276 | break; | |
277 | ||
278 | } | |
279 | ||
280 | } | |
281 | ||
282 | } | |
283 | ||
284 | /* Make sure we don't stay here too long */ | |
285 | if (boguscount++ > 16) | |
286 | break; | |
287 | ||
288 | } while (inb(iobase + UART_LSR) & UART_LSR_DR); | |
289 | } | |
290 | ||
291 | ||
292 | static irqreturn_t btuart_interrupt(int irq, void *dev_inst, struct pt_regs *regs) | |
293 | { | |
294 | btuart_info_t *info = dev_inst; | |
295 | unsigned int iobase; | |
296 | int boguscount = 0; | |
297 | int iir, lsr; | |
298 | ||
299 | if (!info || !info->hdev) { | |
300 | BT_ERR("Call of irq %d for unknown device", irq); | |
301 | return IRQ_NONE; | |
302 | } | |
303 | ||
fd238232 | 304 | iobase = info->p_dev->io.BasePort1; |
1da177e4 LT |
305 | |
306 | spin_lock(&(info->lock)); | |
307 | ||
308 | iir = inb(iobase + UART_IIR) & UART_IIR_ID; | |
309 | while (iir) { | |
310 | ||
311 | /* Clear interrupt */ | |
312 | lsr = inb(iobase + UART_LSR); | |
313 | ||
314 | switch (iir) { | |
315 | case UART_IIR_RLSI: | |
316 | BT_ERR("RLSI"); | |
317 | break; | |
318 | case UART_IIR_RDI: | |
319 | /* Receive interrupt */ | |
320 | btuart_receive(info); | |
321 | break; | |
322 | case UART_IIR_THRI: | |
323 | if (lsr & UART_LSR_THRE) { | |
324 | /* Transmitter ready for data */ | |
325 | btuart_write_wakeup(info); | |
326 | } | |
327 | break; | |
328 | default: | |
329 | BT_ERR("Unhandled IIR=%#x", iir); | |
330 | break; | |
331 | } | |
332 | ||
333 | /* Make sure we don't stay here too long */ | |
334 | if (boguscount++ > 100) | |
335 | break; | |
336 | ||
337 | iir = inb(iobase + UART_IIR) & UART_IIR_ID; | |
338 | ||
339 | } | |
340 | ||
341 | spin_unlock(&(info->lock)); | |
342 | ||
343 | return IRQ_HANDLED; | |
344 | } | |
345 | ||
346 | ||
347 | static void btuart_change_speed(btuart_info_t *info, unsigned int speed) | |
348 | { | |
349 | unsigned long flags; | |
350 | unsigned int iobase; | |
351 | int fcr; /* FIFO control reg */ | |
352 | int lcr; /* Line control reg */ | |
353 | int divisor; | |
354 | ||
355 | if (!info) { | |
356 | BT_ERR("Unknown device"); | |
357 | return; | |
358 | } | |
359 | ||
fd238232 | 360 | iobase = info->p_dev->io.BasePort1; |
1da177e4 LT |
361 | |
362 | spin_lock_irqsave(&(info->lock), flags); | |
363 | ||
364 | /* Turn off interrupts */ | |
365 | outb(0, iobase + UART_IER); | |
366 | ||
367 | divisor = SPEED_MAX / speed; | |
368 | ||
369 | fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT; | |
370 | ||
371 | /* | |
372 | * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and | |
373 | * almost 1,7 ms at 19200 bps. At speeds above that we can just forget | |
374 | * about this timeout since it will always be fast enough. | |
375 | */ | |
376 | ||
377 | if (speed < 38400) | |
378 | fcr |= UART_FCR_TRIGGER_1; | |
379 | else | |
380 | fcr |= UART_FCR_TRIGGER_14; | |
381 | ||
382 | /* Bluetooth cards use 8N1 */ | |
383 | lcr = UART_LCR_WLEN8; | |
384 | ||
385 | outb(UART_LCR_DLAB | lcr, iobase + UART_LCR); /* Set DLAB */ | |
386 | outb(divisor & 0xff, iobase + UART_DLL); /* Set speed */ | |
387 | outb(divisor >> 8, iobase + UART_DLM); | |
388 | outb(lcr, iobase + UART_LCR); /* Set 8N1 */ | |
389 | outb(fcr, iobase + UART_FCR); /* Enable FIFO's */ | |
390 | ||
391 | /* Turn on interrups */ | |
392 | outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER); | |
393 | ||
394 | spin_unlock_irqrestore(&(info->lock), flags); | |
395 | } | |
396 | ||
397 | ||
398 | ||
399 | /* ======================== HCI interface ======================== */ | |
400 | ||
401 | ||
402 | static int btuart_hci_flush(struct hci_dev *hdev) | |
403 | { | |
404 | btuart_info_t *info = (btuart_info_t *)(hdev->driver_data); | |
405 | ||
406 | /* Drop TX queue */ | |
407 | skb_queue_purge(&(info->txq)); | |
408 | ||
409 | return 0; | |
410 | } | |
411 | ||
412 | ||
413 | static int btuart_hci_open(struct hci_dev *hdev) | |
414 | { | |
415 | set_bit(HCI_RUNNING, &(hdev->flags)); | |
416 | ||
417 | return 0; | |
418 | } | |
419 | ||
420 | ||
421 | static int btuart_hci_close(struct hci_dev *hdev) | |
422 | { | |
423 | if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags))) | |
424 | return 0; | |
425 | ||
426 | btuart_hci_flush(hdev); | |
427 | ||
428 | return 0; | |
429 | } | |
430 | ||
431 | ||
432 | static int btuart_hci_send_frame(struct sk_buff *skb) | |
433 | { | |
434 | btuart_info_t *info; | |
435 | struct hci_dev *hdev = (struct hci_dev *)(skb->dev); | |
436 | ||
437 | if (!hdev) { | |
438 | BT_ERR("Frame for unknown HCI device (hdev=NULL)"); | |
439 | return -ENODEV; | |
440 | } | |
441 | ||
442 | info = (btuart_info_t *)(hdev->driver_data); | |
443 | ||
0d48d939 | 444 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
445 | case HCI_COMMAND_PKT: |
446 | hdev->stat.cmd_tx++; | |
447 | break; | |
448 | case HCI_ACLDATA_PKT: | |
449 | hdev->stat.acl_tx++; | |
450 | break; | |
451 | case HCI_SCODATA_PKT: | |
452 | hdev->stat.sco_tx++; | |
453 | break; | |
454 | }; | |
455 | ||
456 | /* Prepend skb with frame type */ | |
0d48d939 | 457 | memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1); |
1da177e4 LT |
458 | skb_queue_tail(&(info->txq), skb); |
459 | ||
460 | btuart_write_wakeup(info); | |
461 | ||
462 | return 0; | |
463 | } | |
464 | ||
465 | ||
466 | static void btuart_hci_destruct(struct hci_dev *hdev) | |
467 | { | |
468 | } | |
469 | ||
470 | ||
471 | static int btuart_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg) | |
472 | { | |
473 | return -ENOIOCTLCMD; | |
474 | } | |
475 | ||
476 | ||
477 | ||
478 | /* ======================== Card services HCI interaction ======================== */ | |
479 | ||
480 | ||
481 | static int btuart_open(btuart_info_t *info) | |
482 | { | |
483 | unsigned long flags; | |
fd238232 | 484 | unsigned int iobase = info->p_dev->io.BasePort1; |
1da177e4 LT |
485 | struct hci_dev *hdev; |
486 | ||
487 | spin_lock_init(&(info->lock)); | |
488 | ||
489 | skb_queue_head_init(&(info->txq)); | |
490 | ||
491 | info->rx_state = RECV_WAIT_PACKET_TYPE; | |
492 | info->rx_count = 0; | |
493 | info->rx_skb = NULL; | |
494 | ||
495 | /* Initialize HCI device */ | |
496 | hdev = hci_alloc_dev(); | |
497 | if (!hdev) { | |
498 | BT_ERR("Can't allocate HCI device"); | |
499 | return -ENOMEM; | |
500 | } | |
501 | ||
502 | info->hdev = hdev; | |
503 | ||
504 | hdev->type = HCI_PCCARD; | |
505 | hdev->driver_data = info; | |
506 | ||
507 | hdev->open = btuart_hci_open; | |
508 | hdev->close = btuart_hci_close; | |
509 | hdev->flush = btuart_hci_flush; | |
510 | hdev->send = btuart_hci_send_frame; | |
511 | hdev->destruct = btuart_hci_destruct; | |
512 | hdev->ioctl = btuart_hci_ioctl; | |
513 | ||
514 | hdev->owner = THIS_MODULE; | |
515 | ||
516 | spin_lock_irqsave(&(info->lock), flags); | |
517 | ||
518 | /* Reset UART */ | |
519 | outb(0, iobase + UART_MCR); | |
520 | ||
521 | /* Turn off interrupts */ | |
522 | outb(0, iobase + UART_IER); | |
523 | ||
524 | /* Initialize UART */ | |
525 | outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */ | |
526 | outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR); | |
527 | ||
528 | /* Turn on interrupts */ | |
529 | // outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER); | |
530 | ||
531 | spin_unlock_irqrestore(&(info->lock), flags); | |
532 | ||
533 | btuart_change_speed(info, DEFAULT_BAUD_RATE); | |
534 | ||
535 | /* Timeout before it is safe to send the first HCI packet */ | |
536 | msleep(1000); | |
537 | ||
538 | /* Register HCI device */ | |
539 | if (hci_register_dev(hdev) < 0) { | |
540 | BT_ERR("Can't register HCI device"); | |
541 | info->hdev = NULL; | |
542 | hci_free_dev(hdev); | |
543 | return -ENODEV; | |
544 | } | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
549 | ||
550 | static int btuart_close(btuart_info_t *info) | |
551 | { | |
552 | unsigned long flags; | |
fd238232 | 553 | unsigned int iobase = info->p_dev->io.BasePort1; |
1da177e4 LT |
554 | struct hci_dev *hdev = info->hdev; |
555 | ||
556 | if (!hdev) | |
557 | return -ENODEV; | |
558 | ||
559 | btuart_hci_close(hdev); | |
560 | ||
561 | spin_lock_irqsave(&(info->lock), flags); | |
562 | ||
563 | /* Reset UART */ | |
564 | outb(0, iobase + UART_MCR); | |
565 | ||
566 | /* Turn off interrupts */ | |
567 | outb(0, iobase + UART_IER); | |
568 | ||
569 | spin_unlock_irqrestore(&(info->lock), flags); | |
570 | ||
571 | if (hci_unregister_dev(hdev) < 0) | |
572 | BT_ERR("Can't unregister HCI device %s", hdev->name); | |
573 | ||
574 | hci_free_dev(hdev); | |
575 | ||
576 | return 0; | |
577 | } | |
578 | ||
fba395ee | 579 | static int btuart_attach(struct pcmcia_device *link) |
1da177e4 LT |
580 | { |
581 | btuart_info_t *info; | |
1da177e4 LT |
582 | |
583 | /* Create new info device */ | |
089b1dbb | 584 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 | 585 | if (!info) |
f8cfa618 | 586 | return -ENOMEM; |
1da177e4 | 587 | |
fba395ee | 588 | info->p_dev = link; |
1da177e4 LT |
589 | link->priv = info; |
590 | ||
591 | link->io.Attributes1 = IO_DATA_PATH_WIDTH_8; | |
592 | link->io.NumPorts1 = 8; | |
593 | link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT; | |
594 | link->irq.IRQInfo1 = IRQ_LEVEL_ID; | |
595 | ||
596 | link->irq.Handler = btuart_interrupt; | |
597 | link->irq.Instance = info; | |
598 | ||
599 | link->conf.Attributes = CONF_ENABLE_IRQ; | |
1da177e4 LT |
600 | link->conf.IntType = INT_MEMORY_AND_IO; |
601 | ||
f8cfa618 DB |
602 | link->state |= DEV_PRESENT | DEV_CONFIG_PENDING; |
603 | btuart_config(link); | |
1da177e4 | 604 | |
f8cfa618 | 605 | return 0; |
1da177e4 LT |
606 | } |
607 | ||
608 | ||
fba395ee | 609 | static void btuart_detach(struct pcmcia_device *link) |
1da177e4 LT |
610 | { |
611 | btuart_info_t *info = link->priv; | |
1da177e4 LT |
612 | |
613 | if (link->state & DEV_CONFIG) | |
614 | btuart_release(link); | |
615 | ||
1da177e4 LT |
616 | kfree(info); |
617 | } | |
618 | ||
fba395ee | 619 | static int get_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse) |
1da177e4 LT |
620 | { |
621 | int i; | |
622 | ||
623 | i = pcmcia_get_tuple_data(handle, tuple); | |
624 | if (i != CS_SUCCESS) | |
625 | return i; | |
626 | ||
627 | return pcmcia_parse_tuple(handle, tuple, parse); | |
628 | } | |
629 | ||
fba395ee | 630 | static int first_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse) |
1da177e4 LT |
631 | { |
632 | if (pcmcia_get_first_tuple(handle, tuple) != CS_SUCCESS) | |
633 | return CS_NO_MORE_ITEMS; | |
634 | return get_tuple(handle, tuple, parse); | |
635 | } | |
636 | ||
fba395ee | 637 | static int next_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse) |
1da177e4 LT |
638 | { |
639 | if (pcmcia_get_next_tuple(handle, tuple) != CS_SUCCESS) | |
640 | return CS_NO_MORE_ITEMS; | |
641 | return get_tuple(handle, tuple, parse); | |
642 | } | |
643 | ||
fba395ee | 644 | static void btuart_config(struct pcmcia_device *link) |
1da177e4 LT |
645 | { |
646 | static kio_addr_t base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 }; | |
1da177e4 LT |
647 | btuart_info_t *info = link->priv; |
648 | tuple_t tuple; | |
649 | u_short buf[256]; | |
650 | cisparse_t parse; | |
651 | cistpl_cftable_entry_t *cf = &parse.cftable_entry; | |
1da177e4 LT |
652 | int i, j, try, last_ret, last_fn; |
653 | ||
654 | tuple.TupleData = (cisdata_t *)buf; | |
655 | tuple.TupleOffset = 0; | |
656 | tuple.TupleDataMax = 255; | |
657 | tuple.Attributes = 0; | |
658 | ||
659 | /* Get configuration register information */ | |
660 | tuple.DesiredTuple = CISTPL_CONFIG; | |
fba395ee | 661 | last_ret = first_tuple(link, &tuple, &parse); |
1da177e4 LT |
662 | if (last_ret != CS_SUCCESS) { |
663 | last_fn = ParseTuple; | |
664 | goto cs_failed; | |
665 | } | |
666 | link->conf.ConfigBase = parse.config.base; | |
667 | link->conf.Present = parse.config.rmask[0]; | |
668 | ||
669 | /* Configure card */ | |
670 | link->state |= DEV_CONFIG; | |
1da177e4 LT |
671 | |
672 | /* First pass: look for a config entry that looks normal. */ | |
673 | tuple.TupleData = (cisdata_t *) buf; | |
674 | tuple.TupleOffset = 0; | |
675 | tuple.TupleDataMax = 255; | |
676 | tuple.Attributes = 0; | |
677 | tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY; | |
678 | /* Two tries: without IO aliases, then with aliases */ | |
679 | for (try = 0; try < 2; try++) { | |
fba395ee | 680 | i = first_tuple(link, &tuple, &parse); |
1da177e4 LT |
681 | while (i != CS_NO_MORE_ITEMS) { |
682 | if (i != CS_SUCCESS) | |
683 | goto next_entry; | |
684 | if (cf->vpp1.present & (1 << CISTPL_POWER_VNOM)) | |
70294b46 | 685 | link->conf.Vpp = cf->vpp1.param[CISTPL_POWER_VNOM] / 10000; |
1da177e4 LT |
686 | if ((cf->io.nwin > 0) && (cf->io.win[0].len == 8) && (cf->io.win[0].base != 0)) { |
687 | link->conf.ConfigIndex = cf->index; | |
688 | link->io.BasePort1 = cf->io.win[0].base; | |
689 | link->io.IOAddrLines = (try == 0) ? 16 : cf->io.flags & CISTPL_IO_LINES_MASK; | |
fba395ee | 690 | i = pcmcia_request_io(link, &link->io); |
1da177e4 LT |
691 | if (i == CS_SUCCESS) |
692 | goto found_port; | |
693 | } | |
694 | next_entry: | |
fba395ee | 695 | i = next_tuple(link, &tuple, &parse); |
1da177e4 LT |
696 | } |
697 | } | |
698 | ||
699 | /* Second pass: try to find an entry that isn't picky about | |
700 | its base address, then try to grab any standard serial port | |
701 | address, and finally try to get any free port. */ | |
fba395ee | 702 | i = first_tuple(link, &tuple, &parse); |
1da177e4 LT |
703 | while (i != CS_NO_MORE_ITEMS) { |
704 | if ((i == CS_SUCCESS) && (cf->io.nwin > 0) | |
705 | && ((cf->io.flags & CISTPL_IO_LINES_MASK) <= 3)) { | |
706 | link->conf.ConfigIndex = cf->index; | |
707 | for (j = 0; j < 5; j++) { | |
708 | link->io.BasePort1 = base[j]; | |
709 | link->io.IOAddrLines = base[j] ? 16 : 3; | |
fba395ee | 710 | i = pcmcia_request_io(link, &link->io); |
1da177e4 LT |
711 | if (i == CS_SUCCESS) |
712 | goto found_port; | |
713 | } | |
714 | } | |
fba395ee | 715 | i = next_tuple(link, &tuple, &parse); |
1da177e4 LT |
716 | } |
717 | ||
718 | found_port: | |
719 | if (i != CS_SUCCESS) { | |
720 | BT_ERR("No usable port range found"); | |
fba395ee | 721 | cs_error(link, RequestIO, i); |
1da177e4 LT |
722 | goto failed; |
723 | } | |
724 | ||
fba395ee | 725 | i = pcmcia_request_irq(link, &link->irq); |
1da177e4 | 726 | if (i != CS_SUCCESS) { |
fba395ee | 727 | cs_error(link, RequestIRQ, i); |
1da177e4 LT |
728 | link->irq.AssignedIRQ = 0; |
729 | } | |
730 | ||
fba395ee | 731 | i = pcmcia_request_configuration(link, &link->conf); |
1da177e4 | 732 | if (i != CS_SUCCESS) { |
fba395ee | 733 | cs_error(link, RequestConfiguration, i); |
1da177e4 LT |
734 | goto failed; |
735 | } | |
736 | ||
737 | if (btuart_open(info) != 0) | |
738 | goto failed; | |
739 | ||
740 | strcpy(info->node.dev_name, info->hdev->name); | |
fd238232 | 741 | link->dev_node = &info->node; |
1da177e4 LT |
742 | link->state &= ~DEV_CONFIG_PENDING; |
743 | ||
744 | return; | |
745 | ||
746 | cs_failed: | |
fba395ee | 747 | cs_error(link, last_fn, last_ret); |
1da177e4 LT |
748 | |
749 | failed: | |
750 | btuart_release(link); | |
751 | } | |
752 | ||
753 | ||
fba395ee | 754 | static void btuart_release(struct pcmcia_device *link) |
1da177e4 LT |
755 | { |
756 | btuart_info_t *info = link->priv; | |
757 | ||
758 | if (link->state & DEV_PRESENT) | |
759 | btuart_close(info); | |
760 | ||
fba395ee | 761 | pcmcia_disable_device(link); |
1da177e4 LT |
762 | } |
763 | ||
279c9361 DB |
764 | static struct pcmcia_device_id btuart_ids[] = { |
765 | /* don't use this driver. Use serial_cs + hci_uart instead */ | |
766 | PCMCIA_DEVICE_NULL | |
767 | }; | |
768 | MODULE_DEVICE_TABLE(pcmcia, btuart_ids); | |
769 | ||
1da177e4 LT |
770 | static struct pcmcia_driver btuart_driver = { |
771 | .owner = THIS_MODULE, | |
772 | .drv = { | |
773 | .name = "btuart_cs", | |
774 | }, | |
f8cfa618 | 775 | .probe = btuart_attach, |
cc3b4866 | 776 | .remove = btuart_detach, |
279c9361 | 777 | .id_table = btuart_ids, |
1da177e4 LT |
778 | }; |
779 | ||
780 | static int __init init_btuart_cs(void) | |
781 | { | |
782 | return pcmcia_register_driver(&btuart_driver); | |
783 | } | |
784 | ||
785 | ||
786 | static void __exit exit_btuart_cs(void) | |
787 | { | |
788 | pcmcia_unregister_driver(&btuart_driver); | |
1da177e4 LT |
789 | } |
790 | ||
791 | module_init(init_btuart_cs); | |
792 | module_exit(exit_btuart_cs); |