summaryrefslogtreecommitdiff
path: root/drivers/usb/serial/sierra.c
blob: 639328b0db20ffaafb2253e39414ab58bcb48a9e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
/*
  USB Driver for Sierra Wireless

  Copyright (C) 2006, 2007, 2008  Kevin Lloyd <klloyd@sierrawireless.com>

  IMPORTANT DISCLAIMER: This driver is not commercially supported by
  Sierra Wireless. Use at your own risk.

  This driver is free software; you can redistribute it and/or modify
  it under the terms of Version 2 of the GNU General Public License as
  published by the Free Software Foundation.

  Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de>
  Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
*/

#define DRIVER_VERSION "v.1.3.2"
#define DRIVER_AUTHOR "Kevin Lloyd <klloyd@sierrawireless.com>"
#define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"

#include <linux/kernel.h>
#include <linux/jiffies.h>
#include <linux/errno.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#include <linux/usb/ch9.h>

#define SWIMS_USB_REQUEST_SetPower	0x00
#define SWIMS_USB_REQUEST_SetNmea	0x07

/* per port private data */
#define N_IN_URB	4
#define N_OUT_URB	4
#define IN_BUFLEN	4096

static int debug;
static int nmea;

static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
{
	int result;
	dev_dbg(&udev->dev, "%s", __func__);
	result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
			SWIMS_USB_REQUEST_SetPower,	/* __u8 request      */
			USB_TYPE_VENDOR,		/* __u8 request type */
			swiState,			/* __u16 value       */
			0,				/* __u16 index       */
			NULL,				/* void *data        */
			0,				/* __u16 size 	     */
			USB_CTRL_SET_TIMEOUT);		/* int timeout 	     */
	return result;
}

static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
{
	int result;
	dev_dbg(&udev->dev, "%s", __func__);
	result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
			SWIMS_USB_REQUEST_SetNmea,	/* __u8 request      */
			USB_TYPE_VENDOR,		/* __u8 request type */
			enable,				/* __u16 value       */
			0x0000,				/* __u16 index       */
			NULL,				/* void *data        */
			0,				/* __u16 size 	     */
			USB_CTRL_SET_TIMEOUT);		/* int timeout       */
	return result;
}

static int sierra_calc_num_ports(struct usb_serial *serial)
{
	int result;
	int *num_ports = usb_get_serial_data(serial);
	dev_dbg(&serial->dev->dev, "%s", __func__);

	result = *num_ports;

	if (result) {
		kfree(num_ports);
		usb_set_serial_data(serial, NULL);
	}

	return result;
}

static int sierra_calc_interface(struct usb_serial *serial)
{
	int interface;
	struct usb_interface *p_interface;
	struct usb_host_interface *p_host_interface;
	dev_dbg(&serial->dev->dev, "%s", __func__);

	/* Get the interface structure pointer from the serial struct */
	p_interface = serial->interface;

	/* Get a pointer to the host interface structure */
	p_host_interface = p_interface->cur_altsetting;

	/* read the interface descriptor for this active altsetting
	 * to find out the interface number we are on
	*/
	interface = p_host_interface->desc.bInterfaceNumber;

	return interface;
}

static int sierra_probe(struct usb_serial *serial,
			const struct usb_device_id *id)
{
	int result = 0;
	struct usb_device *udev;
	int *num_ports;
	u8 ifnum;
	u8 numendpoints;

	dev_dbg(&serial->dev->dev, "%s", __func__);

	num_ports = kmalloc(sizeof(*num_ports), GFP_KERNEL);
	if (!num_ports)
		return -ENOMEM;

	ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
	numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
	udev = serial->dev;

	/* Figure out the interface number from the serial structure */
	ifnum = sierra_calc_interface(serial);

	/*
	 * If this interface supports more than 1 alternate
	 * select the 2nd one
	 */
	if (serial->interface->num_altsetting == 2) {
		dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
			ifnum);
		/* We know the alternate setting is 1 for the MC8785 */
		usb_set_interface(udev, ifnum, 1);
	}

	/* Dummy interface present on some SKUs should be ignored */
	if (ifnum == 0x99)
		*num_ports = 0;
	else if (numendpoints <= 3)
		*num_ports = 1;
	else
		*num_ports = (numendpoints-1)/2;

	/*
	 * save off our num_ports info so that we can use it in the
	 * calc_num_ports callback
	 */
	usb_set_serial_data(serial, (void *)num_ports);

	return result;
}

static struct usb_device_id id_table [] = {
	{ USB_DEVICE(0x1199, 0x0017) },	/* Sierra Wireless EM5625 */
	{ USB_DEVICE(0x1199, 0x0018) },	/* Sierra Wireless MC5720 */
	{ USB_DEVICE(0x1199, 0x0218) },	/* Sierra Wireless MC5720 */
	{ USB_DEVICE(0x03f0, 0x1b1d) }, /* HP ev2200 a.k.a MC5720 */
	{ USB_DEVICE(0x1199, 0x0020) },	/* Sierra Wireless MC5725 */
	{ USB_DEVICE(0x1199, 0x0024) },	/* Sierra Wireless MC5727 */
	{ USB_DEVICE(0x1199, 0x0220) },	/* Sierra Wireless MC5725 */
	{ USB_DEVICE(0x1199, 0x0019) },	/* Sierra Wireless AirCard 595 */
	{ USB_DEVICE(0x1199, 0x0021) },	/* Sierra Wireless AirCard 597E */
	{ USB_DEVICE(0x1199, 0x0120) },	/* Sierra Wireless USB Dongle 595U */
	 /* Sierra Wireless C597 */
	{ USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
	 /* Sierra Wireless Device */
	{ USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
	{ USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless Device */
	{ USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless Device */
	{ USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless Device */

	{ USB_DEVICE(0x1199, 0x6802) },	/* Sierra Wireless MC8755 */
	{ USB_DEVICE(0x1199, 0x6804) },	/* Sierra Wireless MC8755 */
	{ USB_DEVICE(0x1199, 0x6803) },	/* Sierra Wireless MC8765 */
	{ USB_DEVICE(0x1199, 0x6812) },	/* Sierra Wireless MC8775 & AC 875U */
	{ USB_DEVICE(0x1199, 0x6813) },	/* Sierra Wireless MC8775 (Lenovo) */
	{ USB_DEVICE(0x1199, 0x6815) },	/* Sierra Wireless MC8775 */
	{ USB_DEVICE(0x03f0, 0x1e1d) },	/* HP hs2300 a.k.a MC8775 */
	{ USB_DEVICE(0x1199, 0x6820) },	/* Sierra Wireless AirCard 875 */
	{ USB_DEVICE(0x1199, 0x6821) },	/* Sierra Wireless AirCard 875U */
	{ USB_DEVICE(0x1199, 0x6832) },	/* Sierra Wireless MC8780 */
	{ USB_DEVICE(0x1199, 0x6833) },	/* Sierra Wireless MC8781 */
	{ USB_DEVICE(0x1199, 0x683A) },	/* Sierra Wireless MC8785 */
	{ USB_DEVICE(0x1199, 0x683B) },	/* Sierra Wireless MC8785 Composite */
	{ USB_DEVICE(0x1199, 0x683C) },	/* Sierra Wireless MC8790 */
	{ USB_DEVICE(0x1199, 0x683D) },	/* Sierra Wireless MC8790 */
	{ USB_DEVICE(0x1199, 0x683E) },	/* Sierra Wireless MC8790 */
	{ USB_DEVICE(0x1199, 0x6850) },	/* Sierra Wireless AirCard 880 */
	{ USB_DEVICE(0x1199, 0x6851) },	/* Sierra Wireless AirCard 881 */
	{ USB_DEVICE(0x1199, 0x6852) },	/* Sierra Wireless AirCard 880 E */
	{ USB_DEVICE(0x1199, 0x6853) },	/* Sierra Wireless AirCard 881 E */
	{ USB_DEVICE(0x1199, 0x6855) },	/* Sierra Wireless AirCard 880 U */
	{ USB_DEVICE(0x1199, 0x6856) },	/* Sierra Wireless AirCard 881 U */
	{ USB_DEVICE(0x1199, 0x6859) },	/* Sierra Wireless AirCard 885 E */
	{ USB_DEVICE(0x1199, 0x685A) },	/* Sierra Wireless AirCard 885 E */
	/* Sierra Wireless C885 */
	{ USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
	/* Sierra Wireless Device */
	{ USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
	/* Sierra Wireless Device */
	{ USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
	/* Sierra Wireless Device */
	{ USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},

	{ USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
	{ USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */

	{ }
};
MODULE_DEVICE_TABLE(usb, id_table);

static struct usb_driver sierra_driver = {
	.name       = "sierra",
	.probe      = usb_serial_probe,
	.disconnect = usb_serial_disconnect,
	.id_table   = id_table,
	.no_dynamic_id = 	1,
};

struct sierra_port_private {
	spinlock_t lock;	/* lock the structure */
	int outstanding_urbs;	/* number of out urbs in flight */

	/* Input endpoints and buffers for this port */
	struct urb *in_urbs[N_IN_URB];
	char *in_buffer[N_IN_URB];

	/* Settings for the port */
	int rts_state;	/* Handshaking pins (outputs) */
	int dtr_state;
	int cts_state;	/* Handshaking pins (inputs) */
	int dsr_state;
	int dcd_state;
	int ri_state;
};

static int sierra_send_setup(struct tty_struct *tty,
						struct usb_serial_port *port)
{
	struct usb_serial *serial = port->serial;
	struct sierra_port_private *portdata;
	__u16 interface = 0;

	dbg("%s", __func__);

	portdata = usb_get_serial_port_data(port);

	if (tty) {
		int val = 0;
		if (portdata->dtr_state)
			val |= 0x01;
		if (portdata->rts_state)
			val |= 0x02;

		/* If composite device then properly report interface */
		if (serial->num_ports == 1)
			interface = sierra_calc_interface(serial);

		/* Otherwise the need to do non-composite mapping */
		else {
			if (port->bulk_out_endpointAddress == 2)
				interface = 0;
			else if (port->bulk_out_endpointAddress == 4)
				interface = 1;
			else if (port->bulk_out_endpointAddress == 5)
				interface = 2;
		}

		return usb_control_msg(serial->dev,
				usb_rcvctrlpipe(serial->dev, 0),
				0x22, 0x21, val, interface,
				NULL, 0, USB_CTRL_SET_TIMEOUT);
	}

	return 0;
}

static void sierra_set_termios(struct tty_struct *tty,
		struct usb_serial_port *port, struct ktermios *old_termios)
{
	dbg("%s", __func__);
	tty_termios_copy_hw(tty->termios, old_termios);
	sierra_send_setup(tty, port);
}

static int sierra_tiocmget(struct tty_struct *tty, struct file *file)
{
	struct usb_serial_port *port = tty->driver_data;
	unsigned int value;
	struct sierra_port_private *portdata;

	portdata = usb_get_serial_port_data(port);

	value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
		((portdata->dtr_state) ? TIOCM_DTR : 0) |
		((portdata->cts_state) ? TIOCM_CTS : 0) |
		((portdata->dsr_state) ? TIOCM_DSR : 0) |
		((portdata->dcd_state) ? TIOCM_CAR : 0) |
		((portdata->ri_state) ? TIOCM_RNG : 0);

	return value;
}

static int sierra_tiocmset(struct tty_struct *tty, struct file *file,
			unsigned int set, unsigned int clear)
{
	struct usb_serial_port *port = tty->driver_data;
	struct sierra_port_private *portdata;

	portdata = usb_get_serial_port_data(port);

	if (set & TIOCM_RTS)
		portdata->rts_state = 1;
	if (set & TIOCM_DTR)
		portdata->dtr_state = 1;

	if (clear & TIOCM_RTS)
		portdata->rts_state = 0;
	if (clear & TIOCM_DTR)
		portdata->dtr_state = 0;
	return sierra_send_setup(tty, port);
}

static void sierra_outdat_callback(struct urb *urb)
{
	struct usb_serial_port *port = urb->context;
	struct sierra_port_private *portdata = usb_get_serial_port_data(port);
	int status = urb->status;
	unsigned long flags;

	dbg("%s - port %d", __func__, port->number);

	/* free up the transfer buffer, as usb_free_urb() does not do this */
	kfree(urb->transfer_buffer);

	if (status)
		dbg("%s - nonzero write bulk status received: %d",
		    __func__, status);

	spin_lock_irqsave(&portdata->lock, flags);
	--portdata->outstanding_urbs;
	spin_unlock_irqrestore(&portdata->lock, flags);

	usb_serial_port_softint(port);
}

/* Write */
static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
					const unsigned char *buf, int count)
{
	struct sierra_port_private *portdata = usb_get_serial_port_data(port);
	struct usb_serial *serial = port->serial;
	unsigned long flags;
	unsigned char *buffer;
	struct urb *urb;
	int status;

	portdata = usb_get_serial_port_data(port);

	dbg("%s: write (%d chars)", __func__, count);

	spin_lock_irqsave(&portdata->lock, flags);
	if (portdata->outstanding_urbs > N_OUT_URB) {
		spin_unlock_irqrestore(&portdata->lock, flags);
		dbg("%s - write limit hit\n", __func__);
		return 0;
	}
	portdata->outstanding_urbs++;
	spin_unlock_irqrestore(&portdata->lock, flags);

	buffer = kmalloc(count, GFP_ATOMIC);
	if (!buffer) {
		dev_err(&port->dev, "out of memory\n");
		count = -ENOMEM;
		goto error_no_buffer;
	}

	urb = usb_alloc_urb(0, GFP_ATOMIC);
	if (!urb) {
		dev_err(&port->dev, "no more free urbs\n");
		count = -ENOMEM;
		goto error_no_urb;
	}

	memcpy(buffer, buf, count);

	usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);

	usb_fill_bulk_urb(urb, serial->dev,
			  usb_sndbulkpipe(serial->dev,
					  port->bulk_out_endpointAddress),
			  buffer, count, sierra_outdat_callback, port);

	/* send it down the pipe */
	status = usb_submit_urb(urb, GFP_ATOMIC);
	if (status) {
		dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
			"with status = %d\n", __func__, status);
		count = status;
		goto error;
	}

	/* we are done with this urb, so let the host driver
	 * really free it when it is finished with it */
	usb_free_urb(urb);

	return count;
error:
	usb_free_urb(urb);
error_no_urb:
	kfree(buffer);
error_no_buffer:
	spin_lock_irqsave(&portdata->lock, flags);
	--portdata->outstanding_urbs;
	spin_unlock_irqrestore(&portdata->lock, flags);
	return count;
}

static void sierra_indat_callback(struct urb *urb)
{
	int err;
	int endpoint;
	struct usb_serial_port *port;
	struct tty_struct *tty;
	unsigned char *data = urb->transfer_buffer;
	int status = urb->status;

	dbg("%s: %p", __func__, urb);

	endpoint = usb_pipeendpoint(urb->pipe);
	port =  urb->context;

	if (status) {
		dbg("%s: nonzero status: %d on endpoint %02x.",
		    __func__, status, endpoint);
	} else {
		tty = port->port.tty;
		if (urb->actual_length) {
			tty_buffer_request_room(tty, urb->actual_length);
			tty_insert_flip_string(tty, data, urb->actual_length);
			tty_flip_buffer_push(tty);
		} else {
			dbg("%s: empty read urb received", __func__);
		}

		/* Resubmit urb so we continue receiving */
		if (port->port.count && status != -ESHUTDOWN) {
			err = usb_submit_urb(urb, GFP_ATOMIC);
			if (err)
				dev_err(&port->dev, "resubmit read urb failed."
					"(%d)\n", err);
		}
	}
	return;
}

static void sierra_instat_callback(struct urb *urb)
{
	int err;
	int status = urb->status;
	struct usb_serial_port *port =  urb->context;
	struct sierra_port_private *portdata = usb_get_serial_port_data(port);
	struct usb_serial *serial = port->serial;

	dbg("%s", __func__);
	dbg("%s: urb %p port %p has data %p", __func__, urb, port, portdata);

	if (status == 0) {
		struct usb_ctrlrequest *req_pkt =
				(struct usb_ctrlrequest *)urb->transfer_buffer;

		if (!req_pkt) {
			dbg("%s: NULL req_pkt\n", __func__);
			return;
		}
		if ((req_pkt->bRequestType == 0xA1) &&
				(req_pkt->bRequest == 0x20)) {
			int old_dcd_state;
			unsigned char signals = *((unsigned char *)
					urb->transfer_buffer +
					sizeof(struct usb_ctrlrequest));

			dbg("%s: signal x%x", __func__, signals);

			old_dcd_state = portdata->dcd_state;
			portdata->cts_state = 1;
			portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
			portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
			portdata->ri_state = ((signals & 0x08) ? 1 : 0);

			if (port->port.tty && !C_CLOCAL(port->port.tty) &&
					old_dcd_state && !portdata->dcd_state)
				tty_hangup(port->port.tty);
		} else {
			dbg("%s: type %x req %x", __func__,
				req_pkt->bRequestType, req_pkt->bRequest);
		}
	} else
		dbg("%s: error %d", __func__, status);

	/* Resubmit urb so we continue receiving IRQ data */
	if (status != -ESHUTDOWN) {
		urb->dev = serial->dev;
		err = usb_submit_urb(urb, GFP_ATOMIC);
		if (err)
			dbg("%s: resubmit intr urb failed. (%d)",
				__func__, err);
	}
}

static int sierra_write_room(struct tty_struct *tty)
{
	struct usb_serial_port *port = tty->driver_data;
	struct sierra_port_private *portdata = usb_get_serial_port_data(port);
	unsigned long flags;

	dbg("%s - port %d", __func__, port->number);

	/* try to give a good number back based on if we have any free urbs at
	 * this point in time */
	spin_lock_irqsave(&portdata->lock, flags);
	if (portdata->outstanding_urbs > N_OUT_URB * 2 / 3) {
		spin_unlock_irqrestore(&portdata->lock, flags);
		dbg("%s - write limit hit\n", __func__);
		return 0;
	}
	spin_unlock_irqrestore(&portdata->lock, flags);

	return 2048;
}

static int sierra_open(struct tty_struct *tty,
			struct usb_serial_port *port, struct file *filp)
{
	struct sierra_port_private *portdata;
	struct usb_serial *serial = port->serial;
	int i;
	struct urb *urb;
	int result;

	portdata = usb_get_serial_port_data(port);

	dbg("%s", __func__);

	/* Set some sane defaults */
	portdata->rts_state = 1;
	portdata->dtr_state = 1;

	/* Reset low level data toggle and start reading from endpoints */
	for (i = 0; i < N_IN_URB; i++) {
		urb = portdata->in_urbs[i];
		if (!urb)
			continue;
		if (urb->dev != serial->dev) {
			dbg("%s: dev %p != %p", __func__,
				urb->dev, serial->dev);
			continue;
		}

		/*
		 * make sure endpoint data toggle is synchronized with the
		 * device
		 */
		usb_clear_halt(urb->dev, urb->pipe);

		result = usb_submit_urb(urb, GFP_KERNEL);
		if (result) {
			dev_err(&port->dev, "submit urb %d failed (%d) %d\n",
				i, result, urb->transfer_buffer_length);
		}
	}

	sierra_send_setup(tty, port);

	/* start up the interrupt endpoint if we have one */
	if (port->interrupt_in_urb) {
		result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
		if (result)
			dev_err(&port->dev, "submit irq_in urb failed %d\n",
				result);
	}
	return 0;
}

static void sierra_close(struct tty_struct *tty,
			struct usb_serial_port *port, struct file *filp)
{
	int i;
	struct usb_serial *serial = port->serial;
	struct sierra_port_private *portdata;

	dbg("%s", __func__);
	portdata = usb_get_serial_port_data(port);

	portdata->rts_state = 0;
	portdata->dtr_state = 0;

	if (serial->dev) {
		mutex_lock(&serial->disc_mutex);
		if (!serial->disconnected)
			sierra_send_setup(tty, port);
		mutex_unlock(&serial->disc_mutex);

		/* Stop reading/writing urbs */
		for (i = 0; i < N_IN_URB; i++)
			usb_kill_urb(portdata->in_urbs[i]);
	}

	usb_kill_urb(port->interrupt_in_urb);

	port->port.tty = NULL;	/* FIXME */
}

static int sierra_startup(struct usb_serial *serial)
{
	struct usb_serial_port *port;
	struct sierra_port_private *portdata;
	struct urb *urb;
	int i;
	int j;

	dbg("%s", __func__);

	/* Set Device mode to D0 */
	sierra_set_power_state(serial->dev, 0x0000);

	/* Check NMEA and set */
	if (nmea)
		sierra_vsc_set_nmea(serial->dev, 1);

	/* Now setup per port private data */
	for (i = 0; i < serial->num_ports; i++) {
		port = serial->port[i];
		portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
		if (!portdata) {
			dbg("%s: kmalloc for sierra_port_private (%d) failed!.",
					__func__, i);
			return -ENOMEM;
		}
		spin_lock_init(&portdata->lock);
		for (j = 0; j < N_IN_URB; j++) {
			portdata->in_buffer[j] = kmalloc(IN_BUFLEN, GFP_KERNEL);
			if (!portdata->in_buffer[j]) {
				for (--j; j >= 0; j--)
					kfree(portdata->in_buffer[j]);
				kfree(portdata);
				return -ENOMEM;
			}
		}

		usb_set_serial_port_data(port, portdata);

		/* initialize the in urbs */
		for (j = 0; j < N_IN_URB; ++j) {
			urb = usb_alloc_urb(0, GFP_KERNEL);
			if (urb == NULL) {
				dbg("%s: alloc for in port failed.",
				    __func__);
				continue;
			}
			/* Fill URB using supplied data. */
			usb_fill_bulk_urb(urb, serial->dev,
					  usb_rcvbulkpipe(serial->dev,
						port->bulk_in_endpointAddress),
					  portdata->in_buffer[j], IN_BUFLEN,
					  sierra_indat_callback, port);
			portdata->in_urbs[j] = urb;
		}
	}

	return 0;
}

static void sierra_shutdown(struct usb_serial *serial)
{
	int i, j;
	struct usb_serial_port *port;
	struct sierra_port_private *portdata;

	dbg("%s", __func__);

	for (i = 0; i < serial->num_ports; ++i) {
		port = serial->port[i];
		if (!port)
			continue;
		portdata = usb_get_serial_port_data(port);
		if (!portdata)
			continue;

		for (j = 0; j < N_IN_URB; j++) {
			usb_kill_urb(portdata->in_urbs[j]);
			usb_free_urb(portdata->in_urbs[j]);
			kfree(portdata->in_buffer[j]);
		}
		kfree(portdata);
		usb_set_serial_port_data(port, NULL);
	}
}

static struct usb_serial_driver sierra_device = {
	.driver = {
		.owner =	THIS_MODULE,
		.name =		"sierra",
	},
	.description       = "Sierra USB modem",
	.id_table          = id_table,
	.usb_driver        = &sierra_driver,
	.calc_num_ports	   = sierra_calc_num_ports,
	.probe		   = sierra_probe,
	.open              = sierra_open,
	.close             = sierra_close,
	.write             = sierra_write,
	.write_room        = sierra_write_room,
	.set_termios       = sierra_set_termios,
	.tiocmget          = sierra_tiocmget,
	.tiocmset          = sierra_tiocmset,
	.attach            = sierra_startup,
	.shutdown          = sierra_shutdown,
	.read_int_callback = sierra_instat_callback,
};

/* Functions used by new usb-serial code. */
static int __init sierra_init(void)
{
	int retval;
	retval = usb_serial_register(&sierra_device);
	if (retval)
		goto failed_device_register;


	retval = usb_register(&sierra_driver);
	if (retval)
		goto failed_driver_register;

	info(DRIVER_DESC ": " DRIVER_VERSION);

	return 0;

failed_driver_register:
	usb_serial_deregister(&sierra_device);
failed_device_register:
	return retval;
}

static void __exit sierra_exit(void)
{
	usb_deregister(&sierra_driver);
	usb_serial_deregister(&sierra_device);
}

module_init(sierra_init);
module_exit(sierra_exit);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL");

module_param(nmea, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(nmea, "NMEA streaming");

module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug messages");