xref: /linux/drivers/bluetooth/dtl1_cs.c (revision 20d0021394c1b070bf04b22c5bc8fdb437edd4c5) 
1 /*
2  *
3  *  A driver for Nokia Connectivity Card DTL-1 devices
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 
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 Nokia Connectivity Card DTL-1");
63 MODULE_LICENSE("GPL");
64 
65 
66 
67 /* ======================== Local structures ======================== */
68 
69 
70 typedef struct dtl1_info_t {
71 	dev_link_t link;
72 	dev_node_t node;
73 
74 	struct hci_dev *hdev;
75 
76 	spinlock_t lock;		/* For serializing operations */
77 
78 	unsigned long flowmask;		/* HCI flow mask */
79 	int ri_latch;
80 
81 	struct sk_buff_head txq;
82 	unsigned long tx_state;
83 
84 	unsigned long rx_state;
85 	unsigned long rx_count;
86 	struct sk_buff *rx_skb;
87 } dtl1_info_t;
88 
89 
90 static void dtl1_config(dev_link_t *link);
91 static void dtl1_release(dev_link_t *link);
92 static int dtl1_event(event_t event, int priority, event_callback_args_t *args);
93 
94 static dev_info_t dev_info = "dtl1_cs";
95 
96 static dev_link_t *dtl1_attach(void);
97 static void dtl1_detach(dev_link_t *);
98 
99 static dev_link_t *dev_list = NULL;
100 
101 
102 /* Transmit states  */
103 #define XMIT_SENDING  1
104 #define XMIT_WAKEUP   2
105 #define XMIT_WAITING  8
106 
107 /* Receiver States */
108 #define RECV_WAIT_NSH   0
109 #define RECV_WAIT_DATA  1
110 
111 
112 typedef struct {
113 	u8 type;
114 	u8 zero;
115 	u16 len;
116 } __attribute__ ((packed)) nsh_t;	/* Nokia Specific Header */
117 
118 #define NSHL  4				/* Nokia Specific Header Length */
119 
120 
121 
122 /* ======================== Interrupt handling ======================== */
123 
124 
125 static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
126 {
127 	int actual = 0;
128 
129 	/* Tx FIFO should be empty */
130 	if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
131 		return 0;
132 
133 	/* Fill FIFO with current frame */
134 	while ((fifo_size-- > 0) && (actual < len)) {
135 		/* Transmit next byte */
136 		outb(buf[actual], iobase + UART_TX);
137 		actual++;
138 	}
139 
140 	return actual;
141 }
142 
143 
144 static void dtl1_write_wakeup(dtl1_info_t *info)
145 {
146 	if (!info) {
147 		BT_ERR("Unknown device");
148 		return;
149 	}
150 
151 	if (test_bit(XMIT_WAITING, &(info->tx_state))) {
152 		set_bit(XMIT_WAKEUP, &(info->tx_state));
153 		return;
154 	}
155 
156 	if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
157 		set_bit(XMIT_WAKEUP, &(info->tx_state));
158 		return;
159 	}
160 
161 	do {
162 		register unsigned int iobase = info->link.io.BasePort1;
163 		register struct sk_buff *skb;
164 		register int len;
165 
166 		clear_bit(XMIT_WAKEUP, &(info->tx_state));
167 
168 		if (!(info->link.state & DEV_PRESENT))
169 			return;
170 
171 		if (!(skb = skb_dequeue(&(info->txq))))
172 			break;
173 
174 		/* Send frame */
175 		len = dtl1_write(iobase, 32, skb->data, skb->len);
176 
177 		if (len == skb->len) {
178 			set_bit(XMIT_WAITING, &(info->tx_state));
179 			kfree_skb(skb);
180 		} else {
181 			skb_pull(skb, len);
182 			skb_queue_head(&(info->txq), skb);
183 		}
184 
185 		info->hdev->stat.byte_tx += len;
186 
187 	} while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
188 
189 	clear_bit(XMIT_SENDING, &(info->tx_state));
190 }
191 
192 
193 static void dtl1_control(dtl1_info_t *info, struct sk_buff *skb)
194 {
195 	u8 flowmask = *(u8 *)skb->data;
196 	int i;
197 
198 	printk(KERN_INFO "Bluetooth: Nokia control data =");
199 	for (i = 0; i < skb->len; i++) {
200 		printk(" %02x", skb->data[i]);
201 	}
202 	printk("\n");
203 
204 	/* transition to active state */
205 	if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
206 		clear_bit(XMIT_WAITING, &(info->tx_state));
207 		dtl1_write_wakeup(info);
208 	}
209 
210 	info->flowmask = flowmask;
211 
212 	kfree_skb(skb);
213 }
214 
215 
216 static void dtl1_receive(dtl1_info_t *info)
217 {
218 	unsigned int iobase;
219 	nsh_t *nsh;
220 	int boguscount = 0;
221 
222 	if (!info) {
223 		BT_ERR("Unknown device");
224 		return;
225 	}
226 
227 	iobase = info->link.io.BasePort1;
228 
229 	do {
230 		info->hdev->stat.byte_rx++;
231 
232 		/* Allocate packet */
233 		if (info->rx_skb == NULL)
234 			if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
235 				BT_ERR("Can't allocate mem for new packet");
236 				info->rx_state = RECV_WAIT_NSH;
237 				info->rx_count = NSHL;
238 				return;
239 			}
240 
241 		*skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
242 		nsh = (nsh_t *)info->rx_skb->data;
243 
244 		info->rx_count--;
245 
246 		if (info->rx_count == 0) {
247 
248 			switch (info->rx_state) {
249 			case RECV_WAIT_NSH:
250 				info->rx_state = RECV_WAIT_DATA;
251 				info->rx_count = nsh->len + (nsh->len & 0x0001);
252 				break;
253 			case RECV_WAIT_DATA:
254 				info->rx_skb->pkt_type = nsh->type;
255 
256 				/* remove PAD byte if it exists */
257 				if (nsh->len & 0x0001) {
258 					info->rx_skb->tail--;
259 					info->rx_skb->len--;
260 				}
261 
262 				/* remove NSH */
263 				skb_pull(info->rx_skb, NSHL);
264 
265 				switch (info->rx_skb->pkt_type) {
266 				case 0x80:
267 					/* control data for the Nokia Card */
268 					dtl1_control(info, info->rx_skb);
269 					break;
270 				case 0x82:
271 				case 0x83:
272 				case 0x84:
273 					/* send frame to the HCI layer */
274 					info->rx_skb->dev = (void *) info->hdev;
275 					info->rx_skb->pkt_type &= 0x0f;
276 					hci_recv_frame(info->rx_skb);
277 					break;
278 				default:
279 					/* unknown packet */
280 					BT_ERR("Unknown HCI packet with type 0x%02x received", info->rx_skb->pkt_type);
281 					kfree_skb(info->rx_skb);
282 					break;
283 				}
284 
285 				info->rx_state = RECV_WAIT_NSH;
286 				info->rx_count = NSHL;
287 				info->rx_skb = NULL;
288 				break;
289 			}
290 
291 		}
292 
293 		/* Make sure we don't stay here too long */
294 		if (boguscount++ > 32)
295 			break;
296 
297 	} while (inb(iobase + UART_LSR) & UART_LSR_DR);
298 }
299 
300 
301 static irqreturn_t dtl1_interrupt(int irq, void *dev_inst, struct pt_regs *regs)
302 {
303 	dtl1_info_t *info = dev_inst;
304 	unsigned int iobase;
305 	unsigned char msr;
306 	int boguscount = 0;
307 	int iir, lsr;
308 
309 	if (!info || !info->hdev) {
310 		BT_ERR("Call of irq %d for unknown device", irq);
311 		return IRQ_NONE;
312 	}
313 
314 	iobase = info->link.io.BasePort1;
315 
316 	spin_lock(&(info->lock));
317 
318 	iir = inb(iobase + UART_IIR) & UART_IIR_ID;
319 	while (iir) {
320 
321 		/* Clear interrupt */
322 		lsr = inb(iobase + UART_LSR);
323 
324 		switch (iir) {
325 		case UART_IIR_RLSI:
326 			BT_ERR("RLSI");
327 			break;
328 		case UART_IIR_RDI:
329 			/* Receive interrupt */
330 			dtl1_receive(info);
331 			break;
332 		case UART_IIR_THRI:
333 			if (lsr & UART_LSR_THRE) {
334 				/* Transmitter ready for data */
335 				dtl1_write_wakeup(info);
336 			}
337 			break;
338 		default:
339 			BT_ERR("Unhandled IIR=%#x", iir);
340 			break;
341 		}
342 
343 		/* Make sure we don't stay here too long */
344 		if (boguscount++ > 100)
345 			break;
346 
347 		iir = inb(iobase + UART_IIR) & UART_IIR_ID;
348 
349 	}
350 
351 	msr = inb(iobase + UART_MSR);
352 
353 	if (info->ri_latch ^ (msr & UART_MSR_RI)) {
354 		info->ri_latch = msr & UART_MSR_RI;
355 		clear_bit(XMIT_WAITING, &(info->tx_state));
356 		dtl1_write_wakeup(info);
357 	}
358 
359 	spin_unlock(&(info->lock));
360 
361 	return IRQ_HANDLED;
362 }
363 
364 
365 
366 /* ======================== HCI interface ======================== */
367 
368 
369 static int dtl1_hci_open(struct hci_dev *hdev)
370 {
371 	set_bit(HCI_RUNNING, &(hdev->flags));
372 
373 	return 0;
374 }
375 
376 
377 static int dtl1_hci_flush(struct hci_dev *hdev)
378 {
379 	dtl1_info_t *info = (dtl1_info_t *)(hdev->driver_data);
380 
381 	/* Drop TX queue */
382 	skb_queue_purge(&(info->txq));
383 
384 	return 0;
385 }
386 
387 
388 static int dtl1_hci_close(struct hci_dev *hdev)
389 {
390 	if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
391 		return 0;
392 
393 	dtl1_hci_flush(hdev);
394 
395 	return 0;
396 }
397 
398 
399 static int dtl1_hci_send_frame(struct sk_buff *skb)
400 {
401 	dtl1_info_t *info;
402 	struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
403 	struct sk_buff *s;
404 	nsh_t nsh;
405 
406 	if (!hdev) {
407 		BT_ERR("Frame for unknown HCI device (hdev=NULL)");
408 		return -ENODEV;
409 	}
410 
411 	info = (dtl1_info_t *)(hdev->driver_data);
412 
413 	switch (skb->pkt_type) {
414 	case HCI_COMMAND_PKT:
415 		hdev->stat.cmd_tx++;
416 		nsh.type = 0x81;
417 		break;
418 	case HCI_ACLDATA_PKT:
419 		hdev->stat.acl_tx++;
420 		nsh.type = 0x82;
421 		break;
422 	case HCI_SCODATA_PKT:
423 		hdev->stat.sco_tx++;
424 		nsh.type = 0x83;
425 		break;
426 	};
427 
428 	nsh.zero = 0;
429 	nsh.len = skb->len;
430 
431 	s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
432 	skb_reserve(s, NSHL);
433 	memcpy(skb_put(s, skb->len), skb->data, skb->len);
434 	if (skb->len & 0x0001)
435 		*skb_put(s, 1) = 0;	/* PAD */
436 
437 	/* Prepend skb with Nokia frame header and queue */
438 	memcpy(skb_push(s, NSHL), &nsh, NSHL);
439 	skb_queue_tail(&(info->txq), s);
440 
441 	dtl1_write_wakeup(info);
442 
443 	kfree_skb(skb);
444 
445 	return 0;
446 }
447 
448 
449 static void dtl1_hci_destruct(struct hci_dev *hdev)
450 {
451 }
452 
453 
454 static int dtl1_hci_ioctl(struct hci_dev *hdev, unsigned int cmd,  unsigned long arg)
455 {
456 	return -ENOIOCTLCMD;
457 }
458 
459 
460 
461 /* ======================== Card services HCI interaction ======================== */
462 
463 
464 static int dtl1_open(dtl1_info_t *info)
465 {
466 	unsigned long flags;
467 	unsigned int iobase = info->link.io.BasePort1;
468 	struct hci_dev *hdev;
469 
470 	spin_lock_init(&(info->lock));
471 
472 	skb_queue_head_init(&(info->txq));
473 
474 	info->rx_state = RECV_WAIT_NSH;
475 	info->rx_count = NSHL;
476 	info->rx_skb = NULL;
477 
478 	set_bit(XMIT_WAITING, &(info->tx_state));
479 
480 	/* Initialize HCI device */
481 	hdev = hci_alloc_dev();
482 	if (!hdev) {
483 		BT_ERR("Can't allocate HCI device");
484 		return -ENOMEM;
485 	}
486 
487 	info->hdev = hdev;
488 
489 	hdev->type = HCI_PCCARD;
490 	hdev->driver_data = info;
491 
492 	hdev->open     = dtl1_hci_open;
493 	hdev->close    = dtl1_hci_close;
494 	hdev->flush    = dtl1_hci_flush;
495 	hdev->send     = dtl1_hci_send_frame;
496 	hdev->destruct = dtl1_hci_destruct;
497 	hdev->ioctl    = dtl1_hci_ioctl;
498 
499 	hdev->owner = THIS_MODULE;
500 
501 	spin_lock_irqsave(&(info->lock), flags);
502 
503 	/* Reset UART */
504 	outb(0, iobase + UART_MCR);
505 
506 	/* Turn off interrupts */
507 	outb(0, iobase + UART_IER);
508 
509 	/* Initialize UART */
510 	outb(UART_LCR_WLEN8, iobase + UART_LCR);	/* Reset DLAB */
511 	outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
512 
513 	info->ri_latch = inb(info->link.io.BasePort1 + UART_MSR) & UART_MSR_RI;
514 
515 	/* Turn on interrupts */
516 	outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
517 
518 	spin_unlock_irqrestore(&(info->lock), flags);
519 
520 	/* Timeout before it is safe to send the first HCI packet */
521 	msleep(2000);
522 
523 	/* Register HCI device */
524 	if (hci_register_dev(hdev) < 0) {
525 		BT_ERR("Can't register HCI device");
526 		info->hdev = NULL;
527 		hci_free_dev(hdev);
528 		return -ENODEV;
529 	}
530 
531 	return 0;
532 }
533 
534 
535 static int dtl1_close(dtl1_info_t *info)
536 {
537 	unsigned long flags;
538 	unsigned int iobase = info->link.io.BasePort1;
539 	struct hci_dev *hdev = info->hdev;
540 
541 	if (!hdev)
542 		return -ENODEV;
543 
544 	dtl1_hci_close(hdev);
545 
546 	spin_lock_irqsave(&(info->lock), flags);
547 
548 	/* Reset UART */
549 	outb(0, iobase + UART_MCR);
550 
551 	/* Turn off interrupts */
552 	outb(0, iobase + UART_IER);
553 
554 	spin_unlock_irqrestore(&(info->lock), flags);
555 
556 	if (hci_unregister_dev(hdev) < 0)
557 		BT_ERR("Can't unregister HCI device %s", hdev->name);
558 
559 	hci_free_dev(hdev);
560 
561 	return 0;
562 }
563 
564 static dev_link_t *dtl1_attach(void)
565 {
566 	dtl1_info_t *info;
567 	client_reg_t client_reg;
568 	dev_link_t *link;
569 	int ret;
570 
571 	/* Create new info device */
572 	info = kmalloc(sizeof(*info), GFP_KERNEL);
573 	if (!info)
574 		return NULL;
575 	memset(info, 0, sizeof(*info));
576 
577 	link = &info->link;
578 	link->priv = info;
579 
580 	link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
581 	link->io.NumPorts1 = 8;
582 	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
583 	link->irq.IRQInfo1 = IRQ_LEVEL_ID;
584 
585 	link->irq.Handler = dtl1_interrupt;
586 	link->irq.Instance = info;
587 
588 	link->conf.Attributes = CONF_ENABLE_IRQ;
589 	link->conf.Vcc = 50;
590 	link->conf.IntType = INT_MEMORY_AND_IO;
591 
592 	/* Register with Card Services */
593 	link->next = dev_list;
594 	dev_list = link;
595 	client_reg.dev_info = &dev_info;
596 	client_reg.Version = 0x0210;
597 	client_reg.event_callback_args.client_data = link;
598 
599 	ret = pcmcia_register_client(&link->handle, &client_reg);
600 	if (ret != CS_SUCCESS) {
601 		cs_error(link->handle, RegisterClient, ret);
602 		dtl1_detach(link);
603 		return NULL;
604 	}
605 
606 	return link;
607 }
608 
609 
610 static void dtl1_detach(dev_link_t *link)
611 {
612 	dtl1_info_t *info = link->priv;
613 	dev_link_t **linkp;
614 	int ret;
615 
616 	/* Locate device structure */
617 	for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
618 		if (*linkp == link)
619 			break;
620 
621 	if (*linkp == NULL)
622 		return;
623 
624 	if (link->state & DEV_CONFIG)
625 		dtl1_release(link);
626 
627 	if (link->handle) {
628 		ret = pcmcia_deregister_client(link->handle);
629 		if (ret != CS_SUCCESS)
630 			cs_error(link->handle, DeregisterClient, ret);
631 	}
632 
633 	/* Unlink device structure, free bits */
634 	*linkp = link->next;
635 
636 	kfree(info);
637 }
638 
639 static int get_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
640 {
641 	int i;
642 
643 	i = pcmcia_get_tuple_data(handle, tuple);
644 	if (i != CS_SUCCESS)
645 		return i;
646 
647 	return pcmcia_parse_tuple(handle, tuple, parse);
648 }
649 
650 static int first_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
651 {
652 	if (pcmcia_get_first_tuple(handle, tuple) != CS_SUCCESS)
653 		return CS_NO_MORE_ITEMS;
654 	return get_tuple(handle, tuple, parse);
655 }
656 
657 static int next_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
658 {
659 	if (pcmcia_get_next_tuple(handle, tuple) != CS_SUCCESS)
660 		return CS_NO_MORE_ITEMS;
661 	return get_tuple(handle, tuple, parse);
662 }
663 
664 static void dtl1_config(dev_link_t *link)
665 {
666 	client_handle_t handle = link->handle;
667 	dtl1_info_t *info = link->priv;
668 	tuple_t tuple;
669 	u_short buf[256];
670 	cisparse_t parse;
671 	cistpl_cftable_entry_t *cf = &parse.cftable_entry;
672 	config_info_t config;
673 	int i, last_ret, last_fn;
674 
675 	tuple.TupleData = (cisdata_t *)buf;
676 	tuple.TupleOffset = 0;
677 	tuple.TupleDataMax = 255;
678 	tuple.Attributes = 0;
679 
680 	/* Get configuration register information */
681 	tuple.DesiredTuple = CISTPL_CONFIG;
682 	last_ret = first_tuple(handle, &tuple, &parse);
683 	if (last_ret != CS_SUCCESS) {
684 		last_fn = ParseTuple;
685 		goto cs_failed;
686 	}
687 	link->conf.ConfigBase = parse.config.base;
688 	link->conf.Present = parse.config.rmask[0];
689 
690 	/* Configure card */
691 	link->state |= DEV_CONFIG;
692 	i = pcmcia_get_configuration_info(handle, &config);
693 	link->conf.Vcc = config.Vcc;
694 
695 	tuple.TupleData = (cisdata_t *)buf;
696 	tuple.TupleOffset = 0;
697 	tuple.TupleDataMax = 255;
698 	tuple.Attributes = 0;
699 	tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
700 
701 	/* Look for a generic full-sized window */
702 	link->io.NumPorts1 = 8;
703 	i = first_tuple(handle, &tuple, &parse);
704 	while (i != CS_NO_MORE_ITEMS) {
705 		if ((i == CS_SUCCESS) && (cf->io.nwin == 1) && (cf->io.win[0].len > 8)) {
706 			link->conf.ConfigIndex = cf->index;
707 			link->io.BasePort1 = cf->io.win[0].base;
708 			link->io.NumPorts1 = cf->io.win[0].len;	/*yo */
709 			link->io.IOAddrLines = cf->io.flags & CISTPL_IO_LINES_MASK;
710 			i = pcmcia_request_io(link->handle, &link->io);
711 			if (i == CS_SUCCESS)
712 				break;
713 		}
714 		i = next_tuple(handle, &tuple, &parse);
715 	}
716 
717 	if (i != CS_SUCCESS) {
718 		cs_error(link->handle, RequestIO, i);
719 		goto failed;
720 	}
721 
722 	i = pcmcia_request_irq(link->handle, &link->irq);
723 	if (i != CS_SUCCESS) {
724 		cs_error(link->handle, RequestIRQ, i);
725 		link->irq.AssignedIRQ = 0;
726 	}
727 
728 	i = pcmcia_request_configuration(link->handle, &link->conf);
729 	if (i != CS_SUCCESS) {
730 		cs_error(link->handle, RequestConfiguration, i);
731 		goto failed;
732 	}
733 
734 	if (dtl1_open(info) != 0)
735 		goto failed;
736 
737 	strcpy(info->node.dev_name, info->hdev->name);
738 	link->dev = &info->node;
739 	link->state &= ~DEV_CONFIG_PENDING;
740 
741 	return;
742 
743 cs_failed:
744 	cs_error(link->handle, last_fn, last_ret);
745 
746 failed:
747 	dtl1_release(link);
748 }
749 
750 
751 static void dtl1_release(dev_link_t *link)
752 {
753 	dtl1_info_t *info = link->priv;
754 
755 	if (link->state & DEV_PRESENT)
756 		dtl1_close(info);
757 
758 	link->dev = NULL;
759 
760 	pcmcia_release_configuration(link->handle);
761 	pcmcia_release_io(link->handle, &link->io);
762 	pcmcia_release_irq(link->handle, &link->irq);
763 
764 	link->state &= ~DEV_CONFIG;
765 }
766 
767 
768 static int dtl1_event(event_t event, int priority, event_callback_args_t *args)
769 {
770 	dev_link_t *link = args->client_data;
771 	dtl1_info_t *info = link->priv;
772 
773 	switch (event) {
774 	case CS_EVENT_CARD_REMOVAL:
775 		link->state &= ~DEV_PRESENT;
776 		if (link->state & DEV_CONFIG) {
777 			dtl1_close(info);
778 			dtl1_release(link);
779 		}
780 		break;
781 	case CS_EVENT_CARD_INSERTION:
782 		link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
783 		dtl1_config(link);
784 		break;
785 	case CS_EVENT_PM_SUSPEND:
786 		link->state |= DEV_SUSPEND;
787 		/* Fall through... */
788 	case CS_EVENT_RESET_PHYSICAL:
789 		if (link->state & DEV_CONFIG)
790 			pcmcia_release_configuration(link->handle);
791 		break;
792 	case CS_EVENT_PM_RESUME:
793 		link->state &= ~DEV_SUSPEND;
794 		/* Fall through... */
795 	case CS_EVENT_CARD_RESET:
796 		if (DEV_OK(link))
797 			pcmcia_request_configuration(link->handle, &link->conf);
798 		break;
799 	}
800 
801 	return 0;
802 }
803 
804 static struct pcmcia_device_id dtl1_ids[] = {
805 	PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
806 	PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
807 	PCMCIA_DEVICE_NULL
808 };
809 MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
810 
811 static struct pcmcia_driver dtl1_driver = {
812 	.owner		= THIS_MODULE,
813 	.drv		= {
814 		.name	= "dtl1_cs",
815 	},
816 	.attach		= dtl1_attach,
817 	.event		= dtl1_event,
818 	.detach		= dtl1_detach,
819 	.id_table	= dtl1_ids,
820 };
821 
822 static int __init init_dtl1_cs(void)
823 {
824 	return pcmcia_register_driver(&dtl1_driver);
825 }
826 
827 
828 static void __exit exit_dtl1_cs(void)
829 {
830 	pcmcia_unregister_driver(&dtl1_driver);
831 	BUG_ON(dev_list != NULL);
832 }
833 
834 module_init(init_dtl1_cs);
835 module_exit(exit_dtl1_cs);
836