Merge branch 'cpus4096-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6] / drivers / usb / serial / sierra.c
1 /*
2   USB Driver for Sierra Wireless
3
4   Copyright (C) 2006, 2007, 2008  Kevin Lloyd <klloyd@sierrawireless.com>
5
6   IMPORTANT DISCLAIMER: This driver is not commercially supported by
7   Sierra Wireless. Use at your own risk.
8
9   This driver is free software; you can redistribute it and/or modify
10   it under the terms of Version 2 of the GNU General Public License as
11   published by the Free Software Foundation.
12
13   Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de>
14   Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
15 */
16
17 #define DRIVER_VERSION "v.1.3.2"
18 #define DRIVER_AUTHOR "Kevin Lloyd <klloyd@sierrawireless.com>"
19 #define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
20
21 #include <linux/kernel.h>
22 #include <linux/jiffies.h>
23 #include <linux/errno.h>
24 #include <linux/tty.h>
25 #include <linux/tty_flip.h>
26 #include <linux/module.h>
27 #include <linux/usb.h>
28 #include <linux/usb/serial.h>
29 #include <linux/usb/ch9.h>
30
31 #define SWIMS_USB_REQUEST_SetPower      0x00
32 #define SWIMS_USB_REQUEST_SetNmea       0x07
33
34 /* per port private data */
35 #define N_IN_URB        4
36 #define N_OUT_URB       4
37 #define IN_BUFLEN       4096
38
39 static int debug;
40 static int nmea;
41
42 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
43 {
44         int result;
45         dev_dbg(&udev->dev, "%s", __func__);
46         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
47                         SWIMS_USB_REQUEST_SetPower,     /* __u8 request      */
48                         USB_TYPE_VENDOR,                /* __u8 request type */
49                         swiState,                       /* __u16 value       */
50                         0,                              /* __u16 index       */
51                         NULL,                           /* void *data        */
52                         0,                              /* __u16 size        */
53                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
54         return result;
55 }
56
57 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
58 {
59         int result;
60         dev_dbg(&udev->dev, "%s", __func__);
61         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
62                         SWIMS_USB_REQUEST_SetNmea,      /* __u8 request      */
63                         USB_TYPE_VENDOR,                /* __u8 request type */
64                         enable,                         /* __u16 value       */
65                         0x0000,                         /* __u16 index       */
66                         NULL,                           /* void *data        */
67                         0,                              /* __u16 size        */
68                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
69         return result;
70 }
71
72 static int sierra_calc_num_ports(struct usb_serial *serial)
73 {
74         int result;
75         int *num_ports = usb_get_serial_data(serial);
76         dev_dbg(&serial->dev->dev, "%s", __func__);
77
78         result = *num_ports;
79
80         if (result) {
81                 kfree(num_ports);
82                 usb_set_serial_data(serial, NULL);
83         }
84
85         return result;
86 }
87
88 static int sierra_calc_interface(struct usb_serial *serial)
89 {
90         int interface;
91         struct usb_interface *p_interface;
92         struct usb_host_interface *p_host_interface;
93         dev_dbg(&serial->dev->dev, "%s", __func__);
94
95         /* Get the interface structure pointer from the serial struct */
96         p_interface = serial->interface;
97
98         /* Get a pointer to the host interface structure */
99         p_host_interface = p_interface->cur_altsetting;
100
101         /* read the interface descriptor for this active altsetting
102          * to find out the interface number we are on
103         */
104         interface = p_host_interface->desc.bInterfaceNumber;
105
106         return interface;
107 }
108
109 static int sierra_probe(struct usb_serial *serial,
110                         const struct usb_device_id *id)
111 {
112         int result = 0;
113         struct usb_device *udev;
114         int *num_ports;
115         u8 ifnum;
116         u8 numendpoints;
117
118         dev_dbg(&serial->dev->dev, "%s", __func__);
119
120         num_ports = kmalloc(sizeof(*num_ports), GFP_KERNEL);
121         if (!num_ports)
122                 return -ENOMEM;
123
124         ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
125         numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
126         udev = serial->dev;
127
128         /* Figure out the interface number from the serial structure */
129         ifnum = sierra_calc_interface(serial);
130
131         /*
132          * If this interface supports more than 1 alternate
133          * select the 2nd one
134          */
135         if (serial->interface->num_altsetting == 2) {
136                 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
137                         ifnum);
138                 /* We know the alternate setting is 1 for the MC8785 */
139                 usb_set_interface(udev, ifnum, 1);
140         }
141
142         /* Dummy interface present on some SKUs should be ignored */
143         if (ifnum == 0x99)
144                 *num_ports = 0;
145         else if (numendpoints <= 3)
146                 *num_ports = 1;
147         else
148                 *num_ports = (numendpoints-1)/2;
149
150         /*
151          * save off our num_ports info so that we can use it in the
152          * calc_num_ports callback
153          */
154         usb_set_serial_data(serial, (void *)num_ports);
155
156         return result;
157 }
158
159 static struct usb_device_id id_table [] = {
160         { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
161         { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
162         { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
163         { USB_DEVICE(0x03f0, 0x1b1d) }, /* HP ev2200 a.k.a MC5720 */
164         { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
165         { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
166         { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
167         { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
168         { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
169         { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
170          /* Sierra Wireless C597 */
171         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
172          /* Sierra Wireless Device */
173         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
174         { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless Device */
175         { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless Device */
176         { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless Device */
177
178         { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
179         { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
180         { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
181         { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
182         { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 (Lenovo) */
183         { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
184         { USB_DEVICE(0x03f0, 0x1e1d) }, /* HP hs2300 a.k.a MC8775 */
185         { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
186         { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
187         { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
188         { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
189         { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
190         { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
191         { USB_DEVICE(0x1199, 0x683C) }, /* Sierra Wireless MC8790 */
192         { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8790 */
193         { USB_DEVICE(0x1199, 0x683E) }, /* Sierra Wireless MC8790 */
194         { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
195         { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
196         { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
197         { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
198         { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
199         { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
200         { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
201         { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
202         /* Sierra Wireless C885 */
203         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
204         /* Sierra Wireless Device */
205         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
206         /* Sierra Wireless Device */
207         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
208         /* Sierra Wireless Device */
209         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
210
211         { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
212         { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
213
214         { }
215 };
216 MODULE_DEVICE_TABLE(usb, id_table);
217
218 static struct usb_driver sierra_driver = {
219         .name       = "sierra",
220         .probe      = usb_serial_probe,
221         .disconnect = usb_serial_disconnect,
222         .id_table   = id_table,
223         .no_dynamic_id =        1,
224 };
225
226 struct sierra_port_private {
227         spinlock_t lock;        /* lock the structure */
228         int outstanding_urbs;   /* number of out urbs in flight */
229
230         /* Input endpoints and buffers for this port */
231         struct urb *in_urbs[N_IN_URB];
232         char *in_buffer[N_IN_URB];
233
234         /* Settings for the port */
235         int rts_state;  /* Handshaking pins (outputs) */
236         int dtr_state;
237         int cts_state;  /* Handshaking pins (inputs) */
238         int dsr_state;
239         int dcd_state;
240         int ri_state;
241 };
242
243 static int sierra_send_setup(struct tty_struct *tty,
244                                                 struct usb_serial_port *port)
245 {
246         struct usb_serial *serial = port->serial;
247         struct sierra_port_private *portdata;
248         __u16 interface = 0;
249
250         dev_dbg(&port->dev, "%s", __func__);
251
252         portdata = usb_get_serial_port_data(port);
253
254         if (tty) {
255                 int val = 0;
256                 if (portdata->dtr_state)
257                         val |= 0x01;
258                 if (portdata->rts_state)
259                         val |= 0x02;
260
261                 /* If composite device then properly report interface */
262                 if (serial->num_ports == 1)
263                         interface = sierra_calc_interface(serial);
264
265                 /* Otherwise the need to do non-composite mapping */
266                 else {
267                         if (port->bulk_out_endpointAddress == 2)
268                                 interface = 0;
269                         else if (port->bulk_out_endpointAddress == 4)
270                                 interface = 1;
271                         else if (port->bulk_out_endpointAddress == 5)
272                                 interface = 2;
273                 }
274
275                 return usb_control_msg(serial->dev,
276                                 usb_rcvctrlpipe(serial->dev, 0),
277                                 0x22, 0x21, val, interface,
278                                 NULL, 0, USB_CTRL_SET_TIMEOUT);
279         }
280
281         return 0;
282 }
283
284 static void sierra_set_termios(struct tty_struct *tty,
285                 struct usb_serial_port *port, struct ktermios *old_termios)
286 {
287         dev_dbg(&port->dev, "%s", __func__);
288         tty_termios_copy_hw(tty->termios, old_termios);
289         sierra_send_setup(tty, port);
290 }
291
292 static int sierra_tiocmget(struct tty_struct *tty, struct file *file)
293 {
294         struct usb_serial_port *port = tty->driver_data;
295         unsigned int value;
296         struct sierra_port_private *portdata;
297
298         dev_dbg(&port->dev, "%s", __func__);
299         portdata = usb_get_serial_port_data(port);
300
301         value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
302                 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
303                 ((portdata->cts_state) ? TIOCM_CTS : 0) |
304                 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
305                 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
306                 ((portdata->ri_state) ? TIOCM_RNG : 0);
307
308         return value;
309 }
310
311 static int sierra_tiocmset(struct tty_struct *tty, struct file *file,
312                         unsigned int set, unsigned int clear)
313 {
314         struct usb_serial_port *port = tty->driver_data;
315         struct sierra_port_private *portdata;
316
317         portdata = usb_get_serial_port_data(port);
318
319         if (set & TIOCM_RTS)
320                 portdata->rts_state = 1;
321         if (set & TIOCM_DTR)
322                 portdata->dtr_state = 1;
323
324         if (clear & TIOCM_RTS)
325                 portdata->rts_state = 0;
326         if (clear & TIOCM_DTR)
327                 portdata->dtr_state = 0;
328         return sierra_send_setup(tty, port);
329 }
330
331 static void sierra_outdat_callback(struct urb *urb)
332 {
333         struct usb_serial_port *port = urb->context;
334         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
335         int status = urb->status;
336         unsigned long flags;
337
338         dev_dbg(&port->dev, "%s - port %d", __func__, port->number);
339
340         /* free up the transfer buffer, as usb_free_urb() does not do this */
341         kfree(urb->transfer_buffer);
342
343         if (status)
344                 dev_dbg(&port->dev, "%s - nonzero write bulk status "
345                     "received: %d", __func__, status);
346
347         spin_lock_irqsave(&portdata->lock, flags);
348         --portdata->outstanding_urbs;
349         spin_unlock_irqrestore(&portdata->lock, flags);
350
351         usb_serial_port_softint(port);
352 }
353
354 /* Write */
355 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
356                                         const unsigned char *buf, int count)
357 {
358         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
359         struct usb_serial *serial = port->serial;
360         unsigned long flags;
361         unsigned char *buffer;
362         struct urb *urb;
363         int status;
364
365         portdata = usb_get_serial_port_data(port);
366
367         dev_dbg(&port->dev, "%s: write (%d chars)", __func__, count);
368
369         spin_lock_irqsave(&portdata->lock, flags);
370         if (portdata->outstanding_urbs > N_OUT_URB) {
371                 spin_unlock_irqrestore(&portdata->lock, flags);
372                 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
373                 return 0;
374         }
375         portdata->outstanding_urbs++;
376         spin_unlock_irqrestore(&portdata->lock, flags);
377
378         buffer = kmalloc(count, GFP_ATOMIC);
379         if (!buffer) {
380                 dev_err(&port->dev, "out of memory\n");
381                 count = -ENOMEM;
382                 goto error_no_buffer;
383         }
384
385         urb = usb_alloc_urb(0, GFP_ATOMIC);
386         if (!urb) {
387                 dev_err(&port->dev, "no more free urbs\n");
388                 count = -ENOMEM;
389                 goto error_no_urb;
390         }
391
392         memcpy(buffer, buf, count);
393
394         usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
395
396         usb_fill_bulk_urb(urb, serial->dev,
397                           usb_sndbulkpipe(serial->dev,
398                                           port->bulk_out_endpointAddress),
399                           buffer, count, sierra_outdat_callback, port);
400
401         /* send it down the pipe */
402         status = usb_submit_urb(urb, GFP_ATOMIC);
403         if (status) {
404                 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
405                         "with status = %d\n", __func__, status);
406                 count = status;
407                 goto error;
408         }
409
410         /* we are done with this urb, so let the host driver
411          * really free it when it is finished with it */
412         usb_free_urb(urb);
413
414         return count;
415 error:
416         usb_free_urb(urb);
417 error_no_urb:
418         kfree(buffer);
419 error_no_buffer:
420         spin_lock_irqsave(&portdata->lock, flags);
421         --portdata->outstanding_urbs;
422         spin_unlock_irqrestore(&portdata->lock, flags);
423         return count;
424 }
425
426 static void sierra_indat_callback(struct urb *urb)
427 {
428         int err;
429         int endpoint;
430         struct usb_serial_port *port;
431         struct tty_struct *tty;
432         unsigned char *data = urb->transfer_buffer;
433         int status = urb->status;
434
435         dbg("%s: %p", __func__, urb);
436
437         endpoint = usb_pipeendpoint(urb->pipe);
438         port =  urb->context;
439
440         if (status) {
441                 dev_dbg(&port->dev, "%s: nonzero status: %d on"
442                     " endpoint %02x.", __func__, status, endpoint);
443         } else {
444                 if (urb->actual_length) {
445                         tty = tty_port_tty_get(&port->port);
446                         tty_buffer_request_room(tty, urb->actual_length);
447                         tty_insert_flip_string(tty, data, urb->actual_length);
448                         tty_flip_buffer_push(tty);
449                         tty_kref_put(tty);
450                 } else
451                         dev_dbg(&port->dev, "%s: empty read urb"
452                                 " received", __func__);
453
454                 /* Resubmit urb so we continue receiving */
455                 if (port->port.count && status != -ESHUTDOWN) {
456                         err = usb_submit_urb(urb, GFP_ATOMIC);
457                         if (err)
458                                 dev_err(&port->dev, "resubmit read urb failed."
459                                         "(%d)\n", err);
460                 }
461         }
462         return;
463 }
464
465 static void sierra_instat_callback(struct urb *urb)
466 {
467         int err;
468         int status = urb->status;
469         struct usb_serial_port *port =  urb->context;
470         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
471         struct usb_serial *serial = port->serial;
472
473         dev_dbg(&port->dev, "%s", __func__);
474         dev_dbg(&port->dev, "%s: urb %p port %p has data %p", __func__,
475                 urb, port, portdata);
476
477         if (status == 0) {
478                 struct usb_ctrlrequest *req_pkt =
479                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
480
481                 if (!req_pkt) {
482                         dev_dbg(&port->dev, "%s: NULL req_pkt\n",
483                                 __func__);
484                         return;
485                 }
486                 if ((req_pkt->bRequestType == 0xA1) &&
487                                 (req_pkt->bRequest == 0x20)) {
488                         int old_dcd_state;
489                         unsigned char signals = *((unsigned char *)
490                                         urb->transfer_buffer +
491                                         sizeof(struct usb_ctrlrequest));
492                         struct tty_struct *tty;
493
494                         dev_dbg(&port->dev, "%s: signal x%x", __func__,
495                                 signals);
496
497                         old_dcd_state = portdata->dcd_state;
498                         portdata->cts_state = 1;
499                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
500                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
501                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
502
503                         tty = tty_port_tty_get(&port->port);
504                         if (tty && !C_CLOCAL(tty) &&
505                                         old_dcd_state && !portdata->dcd_state)
506                                 tty_hangup(tty);
507                         tty_kref_put(tty);
508                 } else {
509                         dev_dbg(&port->dev, "%s: type %x req %x",
510                                 __func__, req_pkt->bRequestType,
511                                 req_pkt->bRequest);
512                 }
513         } else
514                 dev_dbg(&port->dev, "%s: error %d", __func__, status);
515
516         /* Resubmit urb so we continue receiving IRQ data */
517         if (status != -ESHUTDOWN) {
518                 urb->dev = serial->dev;
519                 err = usb_submit_urb(urb, GFP_ATOMIC);
520                 if (err)
521                         dev_dbg(&port->dev, "%s: resubmit intr urb "
522                                 "failed. (%d)", __func__, err);
523         }
524 }
525
526 static int sierra_write_room(struct tty_struct *tty)
527 {
528         struct usb_serial_port *port = tty->driver_data;
529         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
530         unsigned long flags;
531
532         dev_dbg(&port->dev, "%s - port %d", __func__, port->number);
533
534         /* try to give a good number back based on if we have any free urbs at
535          * this point in time */
536         spin_lock_irqsave(&portdata->lock, flags);
537         if (portdata->outstanding_urbs > N_OUT_URB * 2 / 3) {
538                 spin_unlock_irqrestore(&portdata->lock, flags);
539                 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
540                 return 0;
541         }
542         spin_unlock_irqrestore(&portdata->lock, flags);
543
544         return 2048;
545 }
546
547 static int sierra_open(struct tty_struct *tty,
548                         struct usb_serial_port *port, struct file *filp)
549 {
550         struct sierra_port_private *portdata;
551         struct usb_serial *serial = port->serial;
552         int i;
553         struct urb *urb;
554         int result;
555
556         portdata = usb_get_serial_port_data(port);
557
558         dev_dbg(&port->dev, "%s", __func__);
559
560         /* Set some sane defaults */
561         portdata->rts_state = 1;
562         portdata->dtr_state = 1;
563
564         /* Reset low level data toggle and start reading from endpoints */
565         for (i = 0; i < N_IN_URB; i++) {
566                 urb = portdata->in_urbs[i];
567                 if (!urb)
568                         continue;
569                 if (urb->dev != serial->dev) {
570                         dev_dbg(&port->dev, "%s: dev %p != %p",
571                                  __func__, urb->dev, serial->dev);
572                         continue;
573                 }
574
575                 /*
576                  * make sure endpoint data toggle is synchronized with the
577                  * device
578                  */
579                 usb_clear_halt(urb->dev, urb->pipe);
580
581                 result = usb_submit_urb(urb, GFP_KERNEL);
582                 if (result) {
583                         dev_err(&port->dev, "submit urb %d failed (%d) %d\n",
584                                 i, result, urb->transfer_buffer_length);
585                 }
586         }
587
588         if (tty)
589                 tty->low_latency = 1;
590
591         sierra_send_setup(tty, port);
592
593         /* start up the interrupt endpoint if we have one */
594         if (port->interrupt_in_urb) {
595                 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
596                 if (result)
597                         dev_err(&port->dev, "submit irq_in urb failed %d\n",
598                                 result);
599         }
600         return 0;
601 }
602
603 static void sierra_close(struct tty_struct *tty,
604                         struct usb_serial_port *port, struct file *filp)
605 {
606         int i;
607         struct usb_serial *serial = port->serial;
608         struct sierra_port_private *portdata;
609
610         dev_dbg(&port->dev, "%s", __func__);
611         portdata = usb_get_serial_port_data(port);
612
613         portdata->rts_state = 0;
614         portdata->dtr_state = 0;
615
616         if (serial->dev) {
617                 mutex_lock(&serial->disc_mutex);
618                 if (!serial->disconnected)
619                         sierra_send_setup(tty, port);
620                 mutex_unlock(&serial->disc_mutex);
621
622                 /* Stop reading/writing urbs */
623                 for (i = 0; i < N_IN_URB; i++)
624                         usb_kill_urb(portdata->in_urbs[i]);
625         }
626
627         usb_kill_urb(port->interrupt_in_urb);
628         tty_port_tty_set(&port->port, NULL);
629 }
630
631 static int sierra_startup(struct usb_serial *serial)
632 {
633         struct usb_serial_port *port;
634         struct sierra_port_private *portdata;
635         struct urb *urb;
636         int i;
637         int j;
638
639         dev_dbg(&serial->dev->dev, "%s", __func__);
640
641         /* Set Device mode to D0 */
642         sierra_set_power_state(serial->dev, 0x0000);
643
644         /* Check NMEA and set */
645         if (nmea)
646                 sierra_vsc_set_nmea(serial->dev, 1);
647
648         /* Now setup per port private data */
649         for (i = 0; i < serial->num_ports; i++) {
650                 port = serial->port[i];
651                 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
652                 if (!portdata) {
653                         dev_dbg(&port->dev, "%s: kmalloc for "
654                                 "sierra_port_private (%d) failed!.",
655                                 __func__, i);
656                         return -ENOMEM;
657                 }
658                 spin_lock_init(&portdata->lock);
659                 for (j = 0; j < N_IN_URB; j++) {
660                         portdata->in_buffer[j] = kmalloc(IN_BUFLEN, GFP_KERNEL);
661                         if (!portdata->in_buffer[j]) {
662                                 for (--j; j >= 0; j--)
663                                         kfree(portdata->in_buffer[j]);
664                                 kfree(portdata);
665                                 return -ENOMEM;
666                         }
667                 }
668
669                 usb_set_serial_port_data(port, portdata);
670
671                 /* initialize the in urbs */
672                 for (j = 0; j < N_IN_URB; ++j) {
673                         urb = usb_alloc_urb(0, GFP_KERNEL);
674                         if (urb == NULL) {
675                                 dev_dbg(&port->dev, "%s: alloc for in "
676                                         "port failed.", __func__);
677                                 continue;
678                         }
679                         /* Fill URB using supplied data. */
680                         usb_fill_bulk_urb(urb, serial->dev,
681                                           usb_rcvbulkpipe(serial->dev,
682                                                 port->bulk_in_endpointAddress),
683                                           portdata->in_buffer[j], IN_BUFLEN,
684                                           sierra_indat_callback, port);
685                         portdata->in_urbs[j] = urb;
686                 }
687         }
688
689         return 0;
690 }
691
692 static void sierra_shutdown(struct usb_serial *serial)
693 {
694         int i, j;
695         struct usb_serial_port *port;
696         struct sierra_port_private *portdata;
697
698         dev_dbg(&serial->dev->dev, "%s", __func__);
699
700         for (i = 0; i < serial->num_ports; ++i) {
701                 port = serial->port[i];
702                 if (!port)
703                         continue;
704                 portdata = usb_get_serial_port_data(port);
705                 if (!portdata)
706                         continue;
707
708                 for (j = 0; j < N_IN_URB; j++) {
709                         usb_kill_urb(portdata->in_urbs[j]);
710                         usb_free_urb(portdata->in_urbs[j]);
711                         kfree(portdata->in_buffer[j]);
712                 }
713                 kfree(portdata);
714                 usb_set_serial_port_data(port, NULL);
715         }
716 }
717
718 static struct usb_serial_driver sierra_device = {
719         .driver = {
720                 .owner =        THIS_MODULE,
721                 .name =         "sierra",
722         },
723         .description       = "Sierra USB modem",
724         .id_table          = id_table,
725         .usb_driver        = &sierra_driver,
726         .calc_num_ports    = sierra_calc_num_ports,
727         .probe             = sierra_probe,
728         .open              = sierra_open,
729         .close             = sierra_close,
730         .write             = sierra_write,
731         .write_room        = sierra_write_room,
732         .set_termios       = sierra_set_termios,
733         .tiocmget          = sierra_tiocmget,
734         .tiocmset          = sierra_tiocmset,
735         .attach            = sierra_startup,
736         .shutdown          = sierra_shutdown,
737         .read_int_callback = sierra_instat_callback,
738 };
739
740 /* Functions used by new usb-serial code. */
741 static int __init sierra_init(void)
742 {
743         int retval;
744         retval = usb_serial_register(&sierra_device);
745         if (retval)
746                 goto failed_device_register;
747
748
749         retval = usb_register(&sierra_driver);
750         if (retval)
751                 goto failed_driver_register;
752
753         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
754                DRIVER_DESC "\n");
755
756         return 0;
757
758 failed_driver_register:
759         usb_serial_deregister(&sierra_device);
760 failed_device_register:
761         return retval;
762 }
763
764 static void __exit sierra_exit(void)
765 {
766         usb_deregister(&sierra_driver);
767         usb_serial_deregister(&sierra_device);
768 }
769
770 module_init(sierra_init);
771 module_exit(sierra_exit);
772
773 MODULE_AUTHOR(DRIVER_AUTHOR);
774 MODULE_DESCRIPTION(DRIVER_DESC);
775 MODULE_VERSION(DRIVER_VERSION);
776 MODULE_LICENSE("GPL");
777
778 module_param(nmea, bool, S_IRUGO | S_IWUSR);
779 MODULE_PARM_DESC(nmea, "NMEA streaming");
780
781 module_param(debug, bool, S_IRUGO | S_IWUSR);
782 MODULE_PARM_DESC(debug, "Debug messages");