xref: /linux/drivers/bluetooth/bluecard_cs.c (revision 4b4193256c8d3bc3a5397b5cd9494c2ad386317d)
1 /*
2  *
3  *  Bluetooth driver for the Anycom BlueCard (LSE039/LSE041)
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/module.h>
24 
25 #include <linux/kernel.h>
26 #include <linux/init.h>
27 #include <linux/slab.h>
28 #include <linux/types.h>
29 #include <linux/sched.h>
30 #include <linux/delay.h>
31 #include <linux/timer.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 #include <linux/wait.h>
38 
39 #include <linux/skbuff.h>
40 #include <linux/io.h>
41 
42 #include <pcmcia/cistpl.h>
43 #include <pcmcia/ciscode.h>
44 #include <pcmcia/ds.h>
45 #include <pcmcia/cisreg.h>
46 
47 #include <net/bluetooth/bluetooth.h>
48 #include <net/bluetooth/hci_core.h>
49 
50 
51 
52 /* ======================== Module parameters ======================== */
53 
54 
55 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
56 MODULE_DESCRIPTION("Bluetooth driver for the Anycom BlueCard (LSE039/LSE041)");
57 MODULE_LICENSE("GPL");
58 
59 
60 
61 /* ======================== Local structures ======================== */
62 
63 
64 struct bluecard_info {
65 	struct pcmcia_device *p_dev;
66 
67 	struct hci_dev *hdev;
68 
69 	spinlock_t lock;		/* For serializing operations */
70 	struct timer_list timer;	/* For LED control */
71 
72 	struct sk_buff_head txq;
73 	unsigned long tx_state;
74 
75 	unsigned long rx_state;
76 	unsigned long rx_count;
77 	struct sk_buff *rx_skb;
78 
79 	unsigned char ctrl_reg;
80 	unsigned long hw_state;		/* Status of the hardware and LED control */
81 };
82 
83 
84 static int bluecard_config(struct pcmcia_device *link);
85 static void bluecard_release(struct pcmcia_device *link);
86 
87 static void bluecard_detach(struct pcmcia_device *p_dev);
88 
89 
90 /* Default baud rate: 57600, 115200, 230400 or 460800 */
91 #define DEFAULT_BAUD_RATE  230400
92 
93 
94 /* Hardware states */
95 #define CARD_READY             1
96 #define CARD_ACTIVITY	       2
97 #define CARD_HAS_PCCARD_ID     4
98 #define CARD_HAS_POWER_LED     5
99 #define CARD_HAS_ACTIVITY_LED  6
100 
101 /* Transmit states  */
102 #define XMIT_SENDING         1
103 #define XMIT_WAKEUP          2
104 #define XMIT_BUFFER_NUMBER   5	/* unset = buffer one, set = buffer two */
105 #define XMIT_BUF_ONE_READY   6
106 #define XMIT_BUF_TWO_READY   7
107 #define XMIT_SENDING_READY   8
108 
109 /* Receiver states */
110 #define RECV_WAIT_PACKET_TYPE   0
111 #define RECV_WAIT_EVENT_HEADER  1
112 #define RECV_WAIT_ACL_HEADER    2
113 #define RECV_WAIT_SCO_HEADER    3
114 #define RECV_WAIT_DATA          4
115 
116 /* Special packet types */
117 #define PKT_BAUD_RATE_57600   0x80
118 #define PKT_BAUD_RATE_115200  0x81
119 #define PKT_BAUD_RATE_230400  0x82
120 #define PKT_BAUD_RATE_460800  0x83
121 
122 
123 /* These are the register offsets */
124 #define REG_COMMAND     0x20
125 #define REG_INTERRUPT   0x21
126 #define REG_CONTROL     0x22
127 #define REG_RX_CONTROL  0x24
128 #define REG_CARD_RESET  0x30
129 #define REG_LED_CTRL    0x30
130 
131 /* REG_COMMAND */
132 #define REG_COMMAND_TX_BUF_ONE  0x01
133 #define REG_COMMAND_TX_BUF_TWO  0x02
134 #define REG_COMMAND_RX_BUF_ONE  0x04
135 #define REG_COMMAND_RX_BUF_TWO  0x08
136 #define REG_COMMAND_RX_WIN_ONE  0x00
137 #define REG_COMMAND_RX_WIN_TWO  0x10
138 
139 /* REG_CONTROL */
140 #define REG_CONTROL_BAUD_RATE_57600   0x00
141 #define REG_CONTROL_BAUD_RATE_115200  0x01
142 #define REG_CONTROL_BAUD_RATE_230400  0x02
143 #define REG_CONTROL_BAUD_RATE_460800  0x03
144 #define REG_CONTROL_RTS               0x04
145 #define REG_CONTROL_BT_ON             0x08
146 #define REG_CONTROL_BT_RESET          0x10
147 #define REG_CONTROL_BT_RES_PU         0x20
148 #define REG_CONTROL_INTERRUPT         0x40
149 #define REG_CONTROL_CARD_RESET        0x80
150 
151 /* REG_RX_CONTROL */
152 #define RTS_LEVEL_SHIFT_BITS  0x02
153 
154 
155 
156 /* ======================== LED handling routines ======================== */
157 
158 
bluecard_activity_led_timeout(struct timer_list * t)159 static void bluecard_activity_led_timeout(struct timer_list *t)
160 {
161 	struct bluecard_info *info = from_timer(info, t, timer);
162 	unsigned int iobase = info->p_dev->resource[0]->start;
163 
164 	if (test_bit(CARD_ACTIVITY, &(info->hw_state))) {
165 		/* leave LED in inactive state for HZ/10 for blink effect */
166 		clear_bit(CARD_ACTIVITY, &(info->hw_state));
167 		mod_timer(&(info->timer), jiffies + HZ / 10);
168 	}
169 
170 	/* Disable activity LED, enable power LED */
171 	outb(0x08 | 0x20, iobase + 0x30);
172 }
173 
174 
bluecard_enable_activity_led(struct bluecard_info * info)175 static void bluecard_enable_activity_led(struct bluecard_info *info)
176 {
177 	unsigned int iobase = info->p_dev->resource[0]->start;
178 
179 	/* don't disturb running blink timer */
180 	if (timer_pending(&(info->timer)))
181 		return;
182 
183 	set_bit(CARD_ACTIVITY, &(info->hw_state));
184 
185 	if (test_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state))) {
186 		/* Enable activity LED, keep power LED enabled */
187 		outb(0x18 | 0x60, iobase + 0x30);
188 	} else {
189 		/* Disable power LED */
190 		outb(0x00, iobase + 0x30);
191 	}
192 
193 	/* Stop the LED after HZ/10 */
194 	mod_timer(&(info->timer), jiffies + HZ / 10);
195 }
196 
197 
198 
199 /* ======================== Interrupt handling ======================== */
200 
201 
bluecard_write(unsigned int iobase,unsigned int offset,__u8 * buf,int len)202 static int bluecard_write(unsigned int iobase, unsigned int offset, __u8 *buf, int len)
203 {
204 	int i, actual;
205 
206 	actual = (len > 15) ? 15 : len;
207 
208 	outb_p(actual, iobase + offset);
209 
210 	for (i = 0; i < actual; i++)
211 		outb_p(buf[i], iobase + offset + i + 1);
212 
213 	return actual;
214 }
215 
216 
bluecard_write_wakeup(struct bluecard_info * info)217 static void bluecard_write_wakeup(struct bluecard_info *info)
218 {
219 	if (!info) {
220 		BT_ERR("Unknown device");
221 		return;
222 	}
223 
224 	if (!test_bit(XMIT_SENDING_READY, &(info->tx_state)))
225 		return;
226 
227 	if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
228 		set_bit(XMIT_WAKEUP, &(info->tx_state));
229 		return;
230 	}
231 
232 	do {
233 		unsigned int iobase = info->p_dev->resource[0]->start;
234 		unsigned int offset;
235 		unsigned char command;
236 		unsigned long ready_bit;
237 		register struct sk_buff *skb;
238 		int len;
239 
240 		clear_bit(XMIT_WAKEUP, &(info->tx_state));
241 
242 		if (!pcmcia_dev_present(info->p_dev))
243 			return;
244 
245 		if (test_bit(XMIT_BUFFER_NUMBER, &(info->tx_state))) {
246 			if (!test_bit(XMIT_BUF_TWO_READY, &(info->tx_state)))
247 				break;
248 			offset = 0x10;
249 			command = REG_COMMAND_TX_BUF_TWO;
250 			ready_bit = XMIT_BUF_TWO_READY;
251 		} else {
252 			if (!test_bit(XMIT_BUF_ONE_READY, &(info->tx_state)))
253 				break;
254 			offset = 0x00;
255 			command = REG_COMMAND_TX_BUF_ONE;
256 			ready_bit = XMIT_BUF_ONE_READY;
257 		}
258 
259 		skb = skb_dequeue(&(info->txq));
260 		if (!skb)
261 			break;
262 
263 		if (hci_skb_pkt_type(skb) & 0x80) {
264 			/* Disable RTS */
265 			info->ctrl_reg |= REG_CONTROL_RTS;
266 			outb(info->ctrl_reg, iobase + REG_CONTROL);
267 		}
268 
269 		/* Activate LED */
270 		bluecard_enable_activity_led(info);
271 
272 		/* Send frame */
273 		len = bluecard_write(iobase, offset, skb->data, skb->len);
274 
275 		/* Tell the FPGA to send the data */
276 		outb_p(command, iobase + REG_COMMAND);
277 
278 		/* Mark the buffer as dirty */
279 		clear_bit(ready_bit, &(info->tx_state));
280 
281 		if (hci_skb_pkt_type(skb) & 0x80) {
282 			DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
283 			DEFINE_WAIT(wait);
284 
285 			unsigned char baud_reg;
286 
287 			switch (hci_skb_pkt_type(skb)) {
288 			case PKT_BAUD_RATE_460800:
289 				baud_reg = REG_CONTROL_BAUD_RATE_460800;
290 				break;
291 			case PKT_BAUD_RATE_230400:
292 				baud_reg = REG_CONTROL_BAUD_RATE_230400;
293 				break;
294 			case PKT_BAUD_RATE_115200:
295 				baud_reg = REG_CONTROL_BAUD_RATE_115200;
296 				break;
297 			case PKT_BAUD_RATE_57600:
298 			default:
299 				baud_reg = REG_CONTROL_BAUD_RATE_57600;
300 				break;
301 			}
302 
303 			/* Wait until the command reaches the baseband */
304 			mdelay(100);
305 
306 			/* Set baud on baseband */
307 			info->ctrl_reg &= ~0x03;
308 			info->ctrl_reg |= baud_reg;
309 			outb(info->ctrl_reg, iobase + REG_CONTROL);
310 
311 			/* Enable RTS */
312 			info->ctrl_reg &= ~REG_CONTROL_RTS;
313 			outb(info->ctrl_reg, iobase + REG_CONTROL);
314 
315 			/* Wait before the next HCI packet can be send */
316 			mdelay(1000);
317 		}
318 
319 		if (len == skb->len) {
320 			kfree_skb(skb);
321 		} else {
322 			skb_pull(skb, len);
323 			skb_queue_head(&(info->txq), skb);
324 		}
325 
326 		info->hdev->stat.byte_tx += len;
327 
328 		/* Change buffer */
329 		change_bit(XMIT_BUFFER_NUMBER, &(info->tx_state));
330 
331 	} while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
332 
333 	clear_bit(XMIT_SENDING, &(info->tx_state));
334 }
335 
336 
bluecard_read(unsigned int iobase,unsigned int offset,__u8 * buf,int size)337 static int bluecard_read(unsigned int iobase, unsigned int offset, __u8 *buf, int size)
338 {
339 	int i, n, len;
340 
341 	outb(REG_COMMAND_RX_WIN_ONE, iobase + REG_COMMAND);
342 
343 	len = inb(iobase + offset);
344 	n = 0;
345 	i = 1;
346 
347 	while (n < len) {
348 
349 		if (i == 16) {
350 			outb(REG_COMMAND_RX_WIN_TWO, iobase + REG_COMMAND);
351 			i = 0;
352 		}
353 
354 		buf[n] = inb(iobase + offset + i);
355 
356 		n++;
357 		i++;
358 
359 	}
360 
361 	return len;
362 }
363 
364 
bluecard_receive(struct bluecard_info * info,unsigned int offset)365 static void bluecard_receive(struct bluecard_info *info,
366 			     unsigned int offset)
367 {
368 	unsigned int iobase;
369 	unsigned char buf[31];
370 	int i, len;
371 
372 	if (!info) {
373 		BT_ERR("Unknown device");
374 		return;
375 	}
376 
377 	iobase = info->p_dev->resource[0]->start;
378 
379 	if (test_bit(XMIT_SENDING_READY, &(info->tx_state)))
380 		bluecard_enable_activity_led(info);
381 
382 	len = bluecard_read(iobase, offset, buf, sizeof(buf));
383 
384 	for (i = 0; i < len; i++) {
385 
386 		/* Allocate packet */
387 		if (!info->rx_skb) {
388 			info->rx_state = RECV_WAIT_PACKET_TYPE;
389 			info->rx_count = 0;
390 			info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
391 			if (!info->rx_skb) {
392 				BT_ERR("Can't allocate mem for new packet");
393 				return;
394 			}
395 		}
396 
397 		if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
398 
399 			hci_skb_pkt_type(info->rx_skb) = buf[i];
400 
401 			switch (hci_skb_pkt_type(info->rx_skb)) {
402 
403 			case 0x00:
404 				/* init packet */
405 				if (offset != 0x00) {
406 					set_bit(XMIT_BUF_ONE_READY, &(info->tx_state));
407 					set_bit(XMIT_BUF_TWO_READY, &(info->tx_state));
408 					set_bit(XMIT_SENDING_READY, &(info->tx_state));
409 					bluecard_write_wakeup(info);
410 				}
411 
412 				kfree_skb(info->rx_skb);
413 				info->rx_skb = NULL;
414 				break;
415 
416 			case HCI_EVENT_PKT:
417 				info->rx_state = RECV_WAIT_EVENT_HEADER;
418 				info->rx_count = HCI_EVENT_HDR_SIZE;
419 				break;
420 
421 			case HCI_ACLDATA_PKT:
422 				info->rx_state = RECV_WAIT_ACL_HEADER;
423 				info->rx_count = HCI_ACL_HDR_SIZE;
424 				break;
425 
426 			case HCI_SCODATA_PKT:
427 				info->rx_state = RECV_WAIT_SCO_HEADER;
428 				info->rx_count = HCI_SCO_HDR_SIZE;
429 				break;
430 
431 			default:
432 				/* unknown packet */
433 				BT_ERR("Unknown HCI packet with type 0x%02x received",
434 				       hci_skb_pkt_type(info->rx_skb));
435 				info->hdev->stat.err_rx++;
436 
437 				kfree_skb(info->rx_skb);
438 				info->rx_skb = NULL;
439 				break;
440 
441 			}
442 
443 		} else {
444 
445 			skb_put_u8(info->rx_skb, buf[i]);
446 			info->rx_count--;
447 
448 			if (info->rx_count == 0) {
449 
450 				int dlen;
451 				struct hci_event_hdr *eh;
452 				struct hci_acl_hdr *ah;
453 				struct hci_sco_hdr *sh;
454 
455 				switch (info->rx_state) {
456 
457 				case RECV_WAIT_EVENT_HEADER:
458 					eh = hci_event_hdr(info->rx_skb);
459 					info->rx_state = RECV_WAIT_DATA;
460 					info->rx_count = eh->plen;
461 					break;
462 
463 				case RECV_WAIT_ACL_HEADER:
464 					ah = hci_acl_hdr(info->rx_skb);
465 					dlen = __le16_to_cpu(ah->dlen);
466 					info->rx_state = RECV_WAIT_DATA;
467 					info->rx_count = dlen;
468 					break;
469 
470 				case RECV_WAIT_SCO_HEADER:
471 					sh = hci_sco_hdr(info->rx_skb);
472 					info->rx_state = RECV_WAIT_DATA;
473 					info->rx_count = sh->dlen;
474 					break;
475 
476 				case RECV_WAIT_DATA:
477 					hci_recv_frame(info->hdev, info->rx_skb);
478 					info->rx_skb = NULL;
479 					break;
480 
481 				}
482 
483 			}
484 
485 		}
486 
487 
488 	}
489 
490 	info->hdev->stat.byte_rx += len;
491 }
492 
493 
bluecard_interrupt(int irq,void * dev_inst)494 static irqreturn_t bluecard_interrupt(int irq, void *dev_inst)
495 {
496 	struct bluecard_info *info = dev_inst;
497 	unsigned int iobase;
498 	unsigned char reg;
499 
500 	if (!info || !info->hdev)
501 		/* our irq handler is shared */
502 		return IRQ_NONE;
503 
504 	if (!test_bit(CARD_READY, &(info->hw_state)))
505 		return IRQ_HANDLED;
506 
507 	iobase = info->p_dev->resource[0]->start;
508 
509 	spin_lock(&(info->lock));
510 
511 	/* Disable interrupt */
512 	info->ctrl_reg &= ~REG_CONTROL_INTERRUPT;
513 	outb(info->ctrl_reg, iobase + REG_CONTROL);
514 
515 	reg = inb(iobase + REG_INTERRUPT);
516 
517 	if ((reg != 0x00) && (reg != 0xff)) {
518 
519 		if (reg & 0x04) {
520 			bluecard_receive(info, 0x00);
521 			outb(0x04, iobase + REG_INTERRUPT);
522 			outb(REG_COMMAND_RX_BUF_ONE, iobase + REG_COMMAND);
523 		}
524 
525 		if (reg & 0x08) {
526 			bluecard_receive(info, 0x10);
527 			outb(0x08, iobase + REG_INTERRUPT);
528 			outb(REG_COMMAND_RX_BUF_TWO, iobase + REG_COMMAND);
529 		}
530 
531 		if (reg & 0x01) {
532 			set_bit(XMIT_BUF_ONE_READY, &(info->tx_state));
533 			outb(0x01, iobase + REG_INTERRUPT);
534 			bluecard_write_wakeup(info);
535 		}
536 
537 		if (reg & 0x02) {
538 			set_bit(XMIT_BUF_TWO_READY, &(info->tx_state));
539 			outb(0x02, iobase + REG_INTERRUPT);
540 			bluecard_write_wakeup(info);
541 		}
542 
543 	}
544 
545 	/* Enable interrupt */
546 	info->ctrl_reg |= REG_CONTROL_INTERRUPT;
547 	outb(info->ctrl_reg, iobase + REG_CONTROL);
548 
549 	spin_unlock(&(info->lock));
550 
551 	return IRQ_HANDLED;
552 }
553 
554 
555 
556 /* ======================== Device specific HCI commands ======================== */
557 
558 
bluecard_hci_set_baud_rate(struct hci_dev * hdev,int baud)559 static int bluecard_hci_set_baud_rate(struct hci_dev *hdev, int baud)
560 {
561 	struct bluecard_info *info = hci_get_drvdata(hdev);
562 	struct sk_buff *skb;
563 
564 	/* Ericsson baud rate command */
565 	unsigned char cmd[] = { HCI_COMMAND_PKT, 0x09, 0xfc, 0x01, 0x03 };
566 
567 	skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_KERNEL);
568 	if (!skb) {
569 		BT_ERR("Can't allocate mem for new packet");
570 		return -1;
571 	}
572 
573 	switch (baud) {
574 	case 460800:
575 		cmd[4] = 0x00;
576 		hci_skb_pkt_type(skb) = PKT_BAUD_RATE_460800;
577 		break;
578 	case 230400:
579 		cmd[4] = 0x01;
580 		hci_skb_pkt_type(skb) = PKT_BAUD_RATE_230400;
581 		break;
582 	case 115200:
583 		cmd[4] = 0x02;
584 		hci_skb_pkt_type(skb) = PKT_BAUD_RATE_115200;
585 		break;
586 	case 57600:
587 	default:
588 		cmd[4] = 0x03;
589 		hci_skb_pkt_type(skb) = PKT_BAUD_RATE_57600;
590 		break;
591 	}
592 
593 	skb_put_data(skb, cmd, sizeof(cmd));
594 
595 	skb_queue_tail(&(info->txq), skb);
596 
597 	bluecard_write_wakeup(info);
598 
599 	return 0;
600 }
601 
602 
603 
604 /* ======================== HCI interface ======================== */
605 
606 
bluecard_hci_flush(struct hci_dev * hdev)607 static int bluecard_hci_flush(struct hci_dev *hdev)
608 {
609 	struct bluecard_info *info = hci_get_drvdata(hdev);
610 
611 	/* Drop TX queue */
612 	skb_queue_purge(&(info->txq));
613 
614 	return 0;
615 }
616 
617 
bluecard_hci_open(struct hci_dev * hdev)618 static int bluecard_hci_open(struct hci_dev *hdev)
619 {
620 	struct bluecard_info *info = hci_get_drvdata(hdev);
621 	unsigned int iobase = info->p_dev->resource[0]->start;
622 
623 	if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state)))
624 		bluecard_hci_set_baud_rate(hdev, DEFAULT_BAUD_RATE);
625 
626 	/* Enable power LED */
627 	outb(0x08 | 0x20, iobase + 0x30);
628 
629 	return 0;
630 }
631 
632 
bluecard_hci_close(struct hci_dev * hdev)633 static int bluecard_hci_close(struct hci_dev *hdev)
634 {
635 	struct bluecard_info *info = hci_get_drvdata(hdev);
636 	unsigned int iobase = info->p_dev->resource[0]->start;
637 
638 	bluecard_hci_flush(hdev);
639 
640 	/* Stop LED timer */
641 	del_timer_sync(&(info->timer));
642 
643 	/* Disable power LED */
644 	outb(0x00, iobase + 0x30);
645 
646 	return 0;
647 }
648 
649 
bluecard_hci_send_frame(struct hci_dev * hdev,struct sk_buff * skb)650 static int bluecard_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
651 {
652 	struct bluecard_info *info = hci_get_drvdata(hdev);
653 
654 	switch (hci_skb_pkt_type(skb)) {
655 	case HCI_COMMAND_PKT:
656 		hdev->stat.cmd_tx++;
657 		break;
658 	case HCI_ACLDATA_PKT:
659 		hdev->stat.acl_tx++;
660 		break;
661 	case HCI_SCODATA_PKT:
662 		hdev->stat.sco_tx++;
663 		break;
664 	}
665 
666 	/* Prepend skb with frame type */
667 	memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
668 	skb_queue_tail(&(info->txq), skb);
669 
670 	bluecard_write_wakeup(info);
671 
672 	return 0;
673 }
674 
675 
676 
677 /* ======================== Card services HCI interaction ======================== */
678 
679 
bluecard_open(struct bluecard_info * info)680 static int bluecard_open(struct bluecard_info *info)
681 {
682 	unsigned int iobase = info->p_dev->resource[0]->start;
683 	struct hci_dev *hdev;
684 	unsigned char id;
685 
686 	spin_lock_init(&(info->lock));
687 
688 	timer_setup(&info->timer, bluecard_activity_led_timeout, 0);
689 
690 	skb_queue_head_init(&(info->txq));
691 
692 	info->rx_state = RECV_WAIT_PACKET_TYPE;
693 	info->rx_count = 0;
694 	info->rx_skb = NULL;
695 
696 	/* Initialize HCI device */
697 	hdev = hci_alloc_dev();
698 	if (!hdev) {
699 		BT_ERR("Can't allocate HCI device");
700 		return -ENOMEM;
701 	}
702 
703 	info->hdev = hdev;
704 
705 	hdev->bus = HCI_PCCARD;
706 	hci_set_drvdata(hdev, info);
707 	SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
708 
709 	hdev->open  = bluecard_hci_open;
710 	hdev->close = bluecard_hci_close;
711 	hdev->flush = bluecard_hci_flush;
712 	hdev->send  = bluecard_hci_send_frame;
713 
714 	id = inb(iobase + 0x30);
715 
716 	if ((id & 0x0f) == 0x02)
717 		set_bit(CARD_HAS_PCCARD_ID, &(info->hw_state));
718 
719 	if (id & 0x10)
720 		set_bit(CARD_HAS_POWER_LED, &(info->hw_state));
721 
722 	if (id & 0x20)
723 		set_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state));
724 
725 	/* Reset card */
726 	info->ctrl_reg = REG_CONTROL_BT_RESET | REG_CONTROL_CARD_RESET;
727 	outb(info->ctrl_reg, iobase + REG_CONTROL);
728 
729 	/* Turn FPGA off */
730 	outb(0x80, iobase + 0x30);
731 
732 	/* Wait some time */
733 	msleep(10);
734 
735 	/* Turn FPGA on */
736 	outb(0x00, iobase + 0x30);
737 
738 	/* Activate card */
739 	info->ctrl_reg = REG_CONTROL_BT_ON | REG_CONTROL_BT_RES_PU;
740 	outb(info->ctrl_reg, iobase + REG_CONTROL);
741 
742 	/* Enable interrupt */
743 	outb(0xff, iobase + REG_INTERRUPT);
744 	info->ctrl_reg |= REG_CONTROL_INTERRUPT;
745 	outb(info->ctrl_reg, iobase + REG_CONTROL);
746 
747 	if ((id & 0x0f) == 0x03) {
748 		/* Disable RTS */
749 		info->ctrl_reg |= REG_CONTROL_RTS;
750 		outb(info->ctrl_reg, iobase + REG_CONTROL);
751 
752 		/* Set baud rate */
753 		info->ctrl_reg |= 0x03;
754 		outb(info->ctrl_reg, iobase + REG_CONTROL);
755 
756 		/* Enable RTS */
757 		info->ctrl_reg &= ~REG_CONTROL_RTS;
758 		outb(info->ctrl_reg, iobase + REG_CONTROL);
759 
760 		set_bit(XMIT_BUF_ONE_READY, &(info->tx_state));
761 		set_bit(XMIT_BUF_TWO_READY, &(info->tx_state));
762 		set_bit(XMIT_SENDING_READY, &(info->tx_state));
763 	}
764 
765 	/* Start the RX buffers */
766 	outb(REG_COMMAND_RX_BUF_ONE, iobase + REG_COMMAND);
767 	outb(REG_COMMAND_RX_BUF_TWO, iobase + REG_COMMAND);
768 
769 	/* Signal that the hardware is ready */
770 	set_bit(CARD_READY, &(info->hw_state));
771 
772 	/* Drop TX queue */
773 	skb_queue_purge(&(info->txq));
774 
775 	/* Control the point at which RTS is enabled */
776 	outb((0x0f << RTS_LEVEL_SHIFT_BITS) | 1, iobase + REG_RX_CONTROL);
777 
778 	/* Timeout before it is safe to send the first HCI packet */
779 	msleep(1250);
780 
781 	/* Register HCI device */
782 	if (hci_register_dev(hdev) < 0) {
783 		BT_ERR("Can't register HCI device");
784 		info->hdev = NULL;
785 		hci_free_dev(hdev);
786 		return -ENODEV;
787 	}
788 
789 	return 0;
790 }
791 
792 
bluecard_close(struct bluecard_info * info)793 static int bluecard_close(struct bluecard_info *info)
794 {
795 	unsigned int iobase = info->p_dev->resource[0]->start;
796 	struct hci_dev *hdev = info->hdev;
797 
798 	if (!hdev)
799 		return -ENODEV;
800 
801 	bluecard_hci_close(hdev);
802 
803 	clear_bit(CARD_READY, &(info->hw_state));
804 
805 	/* Reset card */
806 	info->ctrl_reg = REG_CONTROL_BT_RESET | REG_CONTROL_CARD_RESET;
807 	outb(info->ctrl_reg, iobase + REG_CONTROL);
808 
809 	/* Turn FPGA off */
810 	outb(0x80, iobase + 0x30);
811 
812 	hci_unregister_dev(hdev);
813 	hci_free_dev(hdev);
814 
815 	return 0;
816 }
817 
bluecard_probe(struct pcmcia_device * link)818 static int bluecard_probe(struct pcmcia_device *link)
819 {
820 	struct bluecard_info *info;
821 
822 	/* Create new info device */
823 	info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
824 	if (!info)
825 		return -ENOMEM;
826 
827 	info->p_dev = link;
828 	link->priv = info;
829 
830 	link->config_flags |= CONF_ENABLE_IRQ;
831 
832 	return bluecard_config(link);
833 }
834 
835 
bluecard_detach(struct pcmcia_device * link)836 static void bluecard_detach(struct pcmcia_device *link)
837 {
838 	bluecard_release(link);
839 }
840 
841 
bluecard_config(struct pcmcia_device * link)842 static int bluecard_config(struct pcmcia_device *link)
843 {
844 	struct bluecard_info *info = link->priv;
845 	int i, n;
846 
847 	link->config_index = 0x20;
848 
849 	link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
850 	link->resource[0]->end = 64;
851 	link->io_lines = 6;
852 
853 	for (n = 0; n < 0x400; n += 0x40) {
854 		link->resource[0]->start = n ^ 0x300;
855 		i = pcmcia_request_io(link);
856 		if (i == 0)
857 			break;
858 	}
859 
860 	if (i != 0)
861 		goto failed;
862 
863 	i = pcmcia_request_irq(link, bluecard_interrupt);
864 	if (i != 0)
865 		goto failed;
866 
867 	i = pcmcia_enable_device(link);
868 	if (i != 0)
869 		goto failed;
870 
871 	if (bluecard_open(info) != 0)
872 		goto failed;
873 
874 	return 0;
875 
876 failed:
877 	bluecard_release(link);
878 	return -ENODEV;
879 }
880 
881 
bluecard_release(struct pcmcia_device * link)882 static void bluecard_release(struct pcmcia_device *link)
883 {
884 	struct bluecard_info *info = link->priv;
885 
886 	bluecard_close(info);
887 
888 	del_timer_sync(&(info->timer));
889 
890 	pcmcia_disable_device(link);
891 }
892 
893 static const struct pcmcia_device_id bluecard_ids[] = {
894 	PCMCIA_DEVICE_PROD_ID12("BlueCard", "LSE041", 0xbaf16fbf, 0x657cc15e),
895 	PCMCIA_DEVICE_PROD_ID12("BTCFCARD", "LSE139", 0xe3987764, 0x2524b59c),
896 	PCMCIA_DEVICE_PROD_ID12("WSS", "LSE039", 0x0a0736ec, 0x24e6dfab),
897 	PCMCIA_DEVICE_NULL
898 };
899 MODULE_DEVICE_TABLE(pcmcia, bluecard_ids);
900 
901 static struct pcmcia_driver bluecard_driver = {
902 	.owner		= THIS_MODULE,
903 	.name		= "bluecard_cs",
904 	.probe		= bluecard_probe,
905 	.remove		= bluecard_detach,
906 	.id_table	= bluecard_ids,
907 };
908 module_pcmcia_driver(bluecard_driver);
909