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conn rcv_lock converted to spinlock, struct cor_sock created, kernel_packet skb_clone...
[cor_2_6_31.git] / drivers / usb / serial / sierra.c
blobf48d05e0acc135e89a5e4a7518f3d1364b07e35d
1 /*
2 USB Driver for Sierra Wireless
3
4 Copyright (C) 2006, 2007, 2008 Kevin Lloyd <klloyd@sierrawireless.com>,
5
6 Copyright (C) 2008, 2009 Elina Pasheva, Matthew Safar, Rory Filer
7 <linux@sierrawireless.com>
8
9 IMPORTANT DISCLAIMER: This driver is not commercially supported by
10 Sierra Wireless. Use at your own risk.
11
12 This driver is free software; you can redistribute it and/or modify
13 it under the terms of Version 2 of the GNU General Public License as
14 published by the Free Software Foundation.
15
16 Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de>
17 Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
18 */
19
20 #define DRIVER_VERSION "v.1.3.7"
21 #define DRIVER_AUTHOR "Kevin Lloyd, Elina Pasheva, Matthew Safar, Rory Filer"
22 #define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
23
24 #include <linux/kernel.h>
25 #include <linux/jiffies.h>
26 #include <linux/errno.h>
27 #include <linux/tty.h>
28 #include <linux/tty_flip.h>
29 #include <linux/module.h>
30 #include <linux/usb.h>
31 #include <linux/usb/serial.h>
32
33 #define SWIMS_USB_REQUEST_SetPower 0x00
34 #define SWIMS_USB_REQUEST_SetNmea 0x07
35
36 #define N_IN_URB 8
37 #define N_OUT_URB 64
38 #define IN_BUFLEN 4096
39
40 #define MAX_TRANSFER (PAGE_SIZE - 512)
41 /* MAX_TRANSFER is chosen so that the VM is not stressed by
42 allocations > PAGE_SIZE and the number of packets in a page
43 is an integer 512 is the largest possible packet on EHCI */
44
45 static int debug;
46 static int nmea;
47
48 /* Used in interface blacklisting */
49 struct sierra_iface_info {
50 const u32 infolen; /* number of interface numbers on blacklist */
51 const u8 *ifaceinfo; /* pointer to the array holding the numbers */
52 };
53
54 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
55 {
56 int result;
57 dev_dbg(&udev->dev, "%s\n", __func__);
58 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
59 SWIMS_USB_REQUEST_SetPower, /* __u8 request */
60 USB_TYPE_VENDOR, /* __u8 request type */
61 swiState, /* __u16 value */
62 0, /* __u16 index */
63 NULL, /* void *data */
64 0, /* __u16 size */
65 USB_CTRL_SET_TIMEOUT); /* int timeout */
66 return result;
67 }
68
69 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
70 {
71 int result;
72 dev_dbg(&udev->dev, "%s\n", __func__);
73 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
74 SWIMS_USB_REQUEST_SetNmea, /* __u8 request */
75 USB_TYPE_VENDOR, /* __u8 request type */
76 enable, /* __u16 value */
77 0x0000, /* __u16 index */
78 NULL, /* void *data */
79 0, /* __u16 size */
80 USB_CTRL_SET_TIMEOUT); /* int timeout */
81 return result;
82 }
83
84 static int sierra_calc_num_ports(struct usb_serial *serial)
85 {
86 int num_ports = 0;
87 u8 ifnum, numendpoints;
88
89 dev_dbg(&serial->dev->dev, "%s\n", __func__);
90
91 ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
92 numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
93
94 /* Dummy interface present on some SKUs should be ignored */
95 if (ifnum == 0x99)
96 num_ports = 0;
97 else if (numendpoints <= 3)
98 num_ports = 1;
99 else
100 num_ports = (numendpoints-1)/2;
101 return num_ports;
102 }
103
104 static int is_blacklisted(const u8 ifnum,
105 const struct sierra_iface_info *blacklist)
106 {
107 const u8 *info;
108 int i;
109
110 if (blacklist) {
111 info = blacklist->ifaceinfo;
112
113 for (i = 0; i < blacklist->infolen; i++) {
114 if (info[i] == ifnum)
115 return 1;
116 }
117 }
118 return 0;
119 }
120
121 static int sierra_calc_interface(struct usb_serial *serial)
122 {
123 int interface;
124 struct usb_interface *p_interface;
125 struct usb_host_interface *p_host_interface;
126 dev_dbg(&serial->dev->dev, "%s\n", __func__);
127
128 /* Get the interface structure pointer from the serial struct */
129 p_interface = serial->interface;
130
131 /* Get a pointer to the host interface structure */
132 p_host_interface = p_interface->cur_altsetting;
133
134 /* read the interface descriptor for this active altsetting
135 * to find out the interface number we are on
136 */
137 interface = p_host_interface->desc.bInterfaceNumber;
138
139 return interface;
140 }
141
142 static int sierra_probe(struct usb_serial *serial,
143 const struct usb_device_id *id)
144 {
145 int result = 0;
146 struct usb_device *udev;
147 u8 ifnum;
148
149 udev = serial->dev;
150 dev_dbg(&udev->dev, "%s\n", __func__);
151
152 ifnum = sierra_calc_interface(serial);
153 /*
154 * If this interface supports more than 1 alternate
155 * select the 2nd one
156 */
157 if (serial->interface->num_altsetting == 2) {
158 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
159 ifnum);
160 /* We know the alternate setting is 1 for the MC8785 */
161 usb_set_interface(udev, ifnum, 1);
162 }
163
164 /* ifnum could have changed - by calling usb_set_interface */
165 ifnum = sierra_calc_interface(serial);
166
167 if (is_blacklisted(ifnum,
168 (struct sierra_iface_info *)id->driver_info)) {
169 dev_dbg(&serial->dev->dev,
170 "Ignoring blacklisted interface #%d\n", ifnum);
171 return -ENODEV;
172 }
173
174 return result;
175 }
176
177 static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11 };
178 static const struct sierra_iface_info direct_ip_interface_blacklist = {
179 .infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces),
180 .ifaceinfo = direct_ip_non_serial_ifaces,
181 };
182
183 static struct usb_device_id id_table [] = {
184 { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
185 { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */
186 { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */
187
188 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
189 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
190 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
191 { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
192 { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
193 { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */
194 { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
195 { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */
196 { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
197 { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
198 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
199 { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
200 /* Sierra Wireless C597 */
201 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
202 /* Sierra Wireless T598 */
203 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
204 { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */
205 { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */
206 { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */
207 { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */
208
209 { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
210 { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
211 { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
212 { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */
213 { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */
214 { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */
215 { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
216 { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */
217 { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
218 { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */
219 { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
220 { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
221 { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */
222 { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
223 { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
224 { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */
225 { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */
226 { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */
227 { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */
228 { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
229 { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
230 /* Sierra Wireless MC8790, MC8791, MC8792 Composite */
231 { USB_DEVICE(0x1199, 0x683C) },
232 { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
233 /* Sierra Wireless MC8790, MC8791, MC8792 */
234 { USB_DEVICE(0x1199, 0x683E) },
235 { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
236 { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
237 { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
238 { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
239 { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
240 { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
241 { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
242 { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
243 /* Sierra Wireless C885 */
244 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
245 /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */
246 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
247 /* Sierra Wireless C22/C33 */
248 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
249 /* Sierra Wireless HSPA Non-Composite Device */
250 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
251 { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */
252 { USB_DEVICE(0x1199, 0x68A3), /* Sierra Wireless Direct IP modems */
253 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
254 },
255
256 { }
257 };
258 MODULE_DEVICE_TABLE(usb, id_table);
259
260 static struct usb_driver sierra_driver = {
261 .name = "sierra",
262 .probe = usb_serial_probe,
263 .disconnect = usb_serial_disconnect,
264 .id_table = id_table,
265 .no_dynamic_id = 1,
266 };
267
268 struct sierra_port_private {
269 spinlock_t lock; /* lock the structure */
270 int outstanding_urbs; /* number of out urbs in flight */
271
272 /* Input endpoints and buffers for this port */
273 struct urb *in_urbs[N_IN_URB];
274
275 /* Settings for the port */
276 int rts_state; /* Handshaking pins (outputs) */
277 int dtr_state;
278 int cts_state; /* Handshaking pins (inputs) */
279 int dsr_state;
280 int dcd_state;
281 int ri_state;
282 };
283
284 static int sierra_send_setup(struct usb_serial_port *port)
285 {
286 struct usb_serial *serial = port->serial;
287 struct sierra_port_private *portdata;
288 __u16 interface = 0;
289 int val = 0;
290
291 dev_dbg(&port->dev, "%s\n", __func__);
292
293 portdata = usb_get_serial_port_data(port);
294
295 if (portdata->dtr_state)
296 val |= 0x01;
297 if (portdata->rts_state)
298 val |= 0x02;
299
300 /* If composite device then properly report interface */
301 if (serial->num_ports == 1) {
302 interface = sierra_calc_interface(serial);
303 /* Control message is sent only to interfaces with
304 * interrupt_in endpoints
305 */
306 if (port->interrupt_in_urb) {
307 /* send control message */
308 return usb_control_msg(serial->dev,
309 usb_rcvctrlpipe(serial->dev, 0),
310 0x22, 0x21, val, interface,
311 NULL, 0, USB_CTRL_SET_TIMEOUT);
312 }
313 }
314
315 /* Otherwise the need to do non-composite mapping */
316 else {
317 if (port->bulk_out_endpointAddress == 2)
318 interface = 0;
319 else if (port->bulk_out_endpointAddress == 4)
320 interface = 1;
321 else if (port->bulk_out_endpointAddress == 5)
322 interface = 2;
323 return usb_control_msg(serial->dev,
324 usb_rcvctrlpipe(serial->dev, 0),
325 0x22, 0x21, val, interface,
326 NULL, 0, USB_CTRL_SET_TIMEOUT);
327 }
328 return 0;
329 }
330
331 static void sierra_set_termios(struct tty_struct *tty,
332 struct usb_serial_port *port, struct ktermios *old_termios)
333 {
334 dev_dbg(&port->dev, "%s\n", __func__);
335 tty_termios_copy_hw(tty->termios, old_termios);
336 sierra_send_setup(port);
337 }
338
339 static int sierra_tiocmget(struct tty_struct *tty, struct file *file)
340 {
341 struct usb_serial_port *port = tty->driver_data;
342 unsigned int value;
343 struct sierra_port_private *portdata;
344
345 dev_dbg(&port->dev, "%s\n", __func__);
346 portdata = usb_get_serial_port_data(port);
347
348 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
349 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
350 ((portdata->cts_state) ? TIOCM_CTS : 0) |
351 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
352 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
353 ((portdata->ri_state) ? TIOCM_RNG : 0);
354
355 return value;
356 }
357
358 static int sierra_tiocmset(struct tty_struct *tty, struct file *file,
359 unsigned int set, unsigned int clear)
360 {
361 struct usb_serial_port *port = tty->driver_data;
362 struct sierra_port_private *portdata;
363
364 portdata = usb_get_serial_port_data(port);
365
366 if (set & TIOCM_RTS)
367 portdata->rts_state = 1;
368 if (set & TIOCM_DTR)
369 portdata->dtr_state = 1;
370
371 if (clear & TIOCM_RTS)
372 portdata->rts_state = 0;
373 if (clear & TIOCM_DTR)
374 portdata->dtr_state = 0;
375 return sierra_send_setup(port);
376 }
377
378 static void sierra_release_urb(struct urb *urb)
379 {
380 struct usb_serial_port *port;
381 if (urb) {
382 port = urb->context;
383 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
384 kfree(urb->transfer_buffer);
385 usb_free_urb(urb);
386 }
387 }
388
389 static void sierra_outdat_callback(struct urb *urb)
390 {
391 struct usb_serial_port *port = urb->context;
392 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
393 int status = urb->status;
394 unsigned long flags;
395
396 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
397
398 /* free up the transfer buffer, as usb_free_urb() does not do this */
399 kfree(urb->transfer_buffer);
400
401 if (status)
402 dev_dbg(&port->dev, "%s - nonzero write bulk status "
403 "received: %d\n", __func__, status);
404
405 spin_lock_irqsave(&portdata->lock, flags);
406 --portdata->outstanding_urbs;
407 spin_unlock_irqrestore(&portdata->lock, flags);
408
409 usb_serial_port_softint(port);
410 }
411
412 /* Write */
413 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
414 const unsigned char *buf, int count)
415 {
416 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
417 struct usb_serial *serial = port->serial;
418 unsigned long flags;
419 unsigned char *buffer;
420 struct urb *urb;
421 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
422 int retval = 0;
423
424 /* verify that we actually have some data to write */
425 if (count == 0)
426 return 0;
427
428 portdata = usb_get_serial_port_data(port);
429
430 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
431
432 spin_lock_irqsave(&portdata->lock, flags);
433 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
434 portdata->outstanding_urbs);
435 if (portdata->outstanding_urbs > N_OUT_URB) {
436 spin_unlock_irqrestore(&portdata->lock, flags);
437 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
438 return 0;
439 }
440 portdata->outstanding_urbs++;
441 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
442 portdata->outstanding_urbs);
443 spin_unlock_irqrestore(&portdata->lock, flags);
444
445 buffer = kmalloc(writesize, GFP_ATOMIC);
446 if (!buffer) {
447 dev_err(&port->dev, "out of memory\n");
448 retval = -ENOMEM;
449 goto error_no_buffer;
450 }
451
452 urb = usb_alloc_urb(0, GFP_ATOMIC);
453 if (!urb) {
454 dev_err(&port->dev, "no more free urbs\n");
455 retval = -ENOMEM;
456 goto error_no_urb;
457 }
458
459 memcpy(buffer, buf, writesize);
460
461 usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer);
462
463 usb_fill_bulk_urb(urb, serial->dev,
464 usb_sndbulkpipe(serial->dev,
465 port->bulk_out_endpointAddress),
466 buffer, writesize, sierra_outdat_callback, port);
467
468 /* Handle the need to send a zero length packet */
469 urb->transfer_flags |= URB_ZERO_PACKET;
470
471 /* send it down the pipe */
472 retval = usb_submit_urb(urb, GFP_ATOMIC);
473 if (retval) {
474 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
475 "with status = %d\n", __func__, retval);
476 goto error;
477 }
478
479 /* we are done with this urb, so let the host driver
480 * really free it when it is finished with it */
481 usb_free_urb(urb);
482
483 return writesize;
484 error:
485 usb_free_urb(urb);
486 error_no_urb:
487 kfree(buffer);
488 error_no_buffer:
489 spin_lock_irqsave(&portdata->lock, flags);
490 --portdata->outstanding_urbs;
491 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
492 portdata->outstanding_urbs);
493 spin_unlock_irqrestore(&portdata->lock, flags);
494 return retval;
495 }
496
497 static void sierra_indat_callback(struct urb *urb)
498 {
499 int err;
500 int endpoint;
501 struct usb_serial_port *port;
502 struct tty_struct *tty;
503 unsigned char *data = urb->transfer_buffer;
504 int status = urb->status;
505
506 endpoint = usb_pipeendpoint(urb->pipe);
507 port = urb->context;
508
509 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
510
511 if (status) {
512 dev_dbg(&port->dev, "%s: nonzero status: %d on"
513 " endpoint %02x\n", __func__, status, endpoint);
514 } else {
515 if (urb->actual_length) {
516 tty = tty_port_tty_get(&port->port);
517
518 tty_buffer_request_room(tty, urb->actual_length);
519 tty_insert_flip_string(tty, data, urb->actual_length);
520 tty_flip_buffer_push(tty);
521
522 tty_kref_put(tty);
523 usb_serial_debug_data(debug, &port->dev, __func__,
524 urb->actual_length, data);
525 } else {
526 dev_dbg(&port->dev, "%s: empty read urb"
527 " received\n", __func__);
528 }
529 }
530
531 /* Resubmit urb so we continue receiving */
532 if (port->port.count && status != -ESHUTDOWN && status != -EPERM) {
533 err = usb_submit_urb(urb, GFP_ATOMIC);
534 if (err)
535 dev_err(&port->dev, "resubmit read urb failed."
536 "(%d)\n", err);
537 }
538
539 return;
540 }
541
542 static void sierra_instat_callback(struct urb *urb)
543 {
544 int err;
545 int status = urb->status;
546 struct usb_serial_port *port = urb->context;
547 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
548 struct usb_serial *serial = port->serial;
549
550 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
551 urb, port, portdata);
552
553 if (status == 0) {
554 struct usb_ctrlrequest *req_pkt =
555 (struct usb_ctrlrequest *)urb->transfer_buffer;
556
557 if (!req_pkt) {
558 dev_dbg(&port->dev, "%s: NULL req_pkt\n",
559 __func__);
560 return;
561 }
562 if ((req_pkt->bRequestType == 0xA1) &&
563 (req_pkt->bRequest == 0x20)) {
564 int old_dcd_state;
565 unsigned char signals = *((unsigned char *)
566 urb->transfer_buffer +
567 sizeof(struct usb_ctrlrequest));
568 struct tty_struct *tty;
569
570 dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
571 signals);
572
573 old_dcd_state = portdata->dcd_state;
574 portdata->cts_state = 1;
575 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
576 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
577 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
578
579 tty = tty_port_tty_get(&port->port);
580 if (tty && !C_CLOCAL(tty) &&
581 old_dcd_state && !portdata->dcd_state)
582 tty_hangup(tty);
583 tty_kref_put(tty);
584 } else {
585 dev_dbg(&port->dev, "%s: type %x req %x\n",
586 __func__, req_pkt->bRequestType,
587 req_pkt->bRequest);
588 }
589 } else
590 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
591
592 /* Resubmit urb so we continue receiving IRQ data */
593 if (port->port.count && status != -ESHUTDOWN && status != -ENOENT) {
594 urb->dev = serial->dev;
595 err = usb_submit_urb(urb, GFP_ATOMIC);
596 if (err)
597 dev_err(&port->dev, "%s: resubmit intr urb "
598 "failed. (%d)\n", __func__, err);
599 }
600 }
601
602 static int sierra_write_room(struct tty_struct *tty)
603 {
604 struct usb_serial_port *port = tty->driver_data;
605 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
606 unsigned long flags;
607
608 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
609
610 /* try to give a good number back based on if we have any free urbs at
611 * this point in time */
612 spin_lock_irqsave(&portdata->lock, flags);
613 if (portdata->outstanding_urbs > N_OUT_URB * 2 / 3) {
614 spin_unlock_irqrestore(&portdata->lock, flags);
615 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
616 return 0;
617 }
618 spin_unlock_irqrestore(&portdata->lock, flags);
619
620 return 2048;
621 }
622
623 static void sierra_stop_rx_urbs(struct usb_serial_port *port)
624 {
625 int i;
626 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
627
628 for (i = 0; i < ARRAY_SIZE(portdata->in_urbs); i++)
629 usb_kill_urb(portdata->in_urbs[i]);
630
631 usb_kill_urb(port->interrupt_in_urb);
632 }
633
634 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
635 {
636 int ok_cnt;
637 int err = -EINVAL;
638 int i;
639 struct urb *urb;
640 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
641
642 ok_cnt = 0;
643 for (i = 0; i < ARRAY_SIZE(portdata->in_urbs); i++) {
644 urb = portdata->in_urbs[i];
645 if (!urb)
646 continue;
647 err = usb_submit_urb(urb, mem_flags);
648 if (err) {
649 dev_err(&port->dev, "%s: submit urb failed: %d\n",
650 __func__, err);
651 } else {
652 ok_cnt++;
653 }
654 }
655
656 if (ok_cnt && port->interrupt_in_urb) {
657 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
658 if (err) {
659 dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
660 __func__, err);
661 }
662 }
663
664 if (ok_cnt > 0) /* at least one rx urb submitted */
665 return 0;
666 else
667 return err;
668 }
669
670 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
671 int dir, void *ctx, int len,
672 gfp_t mem_flags,
673 usb_complete_t callback)
674 {
675 struct urb *urb;
676 u8 *buf;
677
678 if (endpoint == -1)
679 return NULL;
680
681 urb = usb_alloc_urb(0, mem_flags);
682 if (urb == NULL) {
683 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n",
684 __func__, endpoint);
685 return NULL;
686 }
687
688 buf = kmalloc(len, mem_flags);
689 if (buf) {
690 /* Fill URB using supplied data */
691 usb_fill_bulk_urb(urb, serial->dev,
692 usb_sndbulkpipe(serial->dev, endpoint) | dir,
693 buf, len, callback, ctx);
694
695 /* debug */
696 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
697 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
698 } else {
699 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__,
700 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
701
702 sierra_release_urb(urb);
703 urb = NULL;
704 }
705
706 return urb;
707 }
708
709 static void sierra_close(struct usb_serial_port *port)
710 {
711 int i;
712 struct usb_serial *serial = port->serial;
713 struct sierra_port_private *portdata;
714
715 dev_dbg(&port->dev, "%s\n", __func__);
716 portdata = usb_get_serial_port_data(port);
717
718 portdata->rts_state = 0;
719 portdata->dtr_state = 0;
720
721 if (serial->dev) {
722 mutex_lock(&serial->disc_mutex);
723 if (!serial->disconnected)
724 sierra_send_setup(port);
725 mutex_unlock(&serial->disc_mutex);
726
727 /* Stop reading urbs */
728 sierra_stop_rx_urbs(port);
729 /* .. and release them */
730 for (i = 0; i < N_IN_URB; i++) {
731 sierra_release_urb(portdata->in_urbs[i]);
732 portdata->in_urbs[i] = NULL;
733 }
734 }
735 }
736
737 static int sierra_open(struct tty_struct *tty,
738 struct usb_serial_port *port, struct file *filp)
739 {
740 struct sierra_port_private *portdata;
741 struct usb_serial *serial = port->serial;
742 int i;
743 int err;
744 int endpoint;
745 struct urb *urb;
746
747 portdata = usb_get_serial_port_data(port);
748
749 dev_dbg(&port->dev, "%s\n", __func__);
750
751 /* Set some sane defaults */
752 portdata->rts_state = 1;
753 portdata->dtr_state = 1;
754
755
756 endpoint = port->bulk_in_endpointAddress;
757 for (i = 0; i < ARRAY_SIZE(portdata->in_urbs); i++) {
758 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
759 IN_BUFLEN, GFP_KERNEL,
760 sierra_indat_callback);
761 portdata->in_urbs[i] = urb;
762 }
763 /* clear halt condition */
764 usb_clear_halt(serial->dev,
765 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
766
767 err = sierra_submit_rx_urbs(port, GFP_KERNEL);
768 if (err) {
769 /* get rid of everything as in close */
770 sierra_close(port);
771 return err;
772 }
773 sierra_send_setup(port);
774
775 return 0;
776 }
777
778
779 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
780 {
781 struct usb_serial *serial = port->serial;
782 struct sierra_port_private *portdata;
783
784 portdata = usb_get_serial_port_data(port);
785 portdata->rts_state = on;
786 portdata->dtr_state = on;
787
788 if (serial->dev) {
789 mutex_lock(&serial->disc_mutex);
790 if (!serial->disconnected)
791 sierra_send_setup(port);
792 mutex_unlock(&serial->disc_mutex);
793 }
794 }
795
796 static int sierra_startup(struct usb_serial *serial)
797 {
798 struct usb_serial_port *port;
799 struct sierra_port_private *portdata;
800 int i;
801
802 dev_dbg(&serial->dev->dev, "%s\n", __func__);
803
804 /* Set Device mode to D0 */
805 sierra_set_power_state(serial->dev, 0x0000);
806
807 /* Check NMEA and set */
808 if (nmea)
809 sierra_vsc_set_nmea(serial->dev, 1);
810
811 /* Now setup per port private data */
812 for (i = 0; i < serial->num_ports; i++) {
813 port = serial->port[i];
814 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
815 if (!portdata) {
816 dev_dbg(&port->dev, "%s: kmalloc for "
817 "sierra_port_private (%d) failed!.\n",
818 __func__, i);
819 return -ENOMEM;
820 }
821 spin_lock_init(&portdata->lock);
822 /* Set the port private data pointer */
823 usb_set_serial_port_data(port, portdata);
824 }
825
826 return 0;
827 }
828
829 static void sierra_release(struct usb_serial *serial)
830 {
831 int i;
832 struct usb_serial_port *port;
833 struct sierra_port_private *portdata;
834
835 dev_dbg(&serial->dev->dev, "%s\n", __func__);
836
837 for (i = 0; i < serial->num_ports; ++i) {
838 port = serial->port[i];
839 if (!port)
840 continue;
841 portdata = usb_get_serial_port_data(port);
842 if (!portdata)
843 continue;
844 kfree(portdata);
845 }
846 }
847
848 static struct usb_serial_driver sierra_device = {
849 .driver = {
850 .owner = THIS_MODULE,
851 .name = "sierra",
852 },
853 .description = "Sierra USB modem",
854 .id_table = id_table,
855 .usb_driver = &sierra_driver,
856 .calc_num_ports = sierra_calc_num_ports,
857 .probe = sierra_probe,
858 .open = sierra_open,
859 .close = sierra_close,
860 .dtr_rts = sierra_dtr_rts,
861 .write = sierra_write,
862 .write_room = sierra_write_room,
863 .set_termios = sierra_set_termios,
864 .tiocmget = sierra_tiocmget,
865 .tiocmset = sierra_tiocmset,
866 .attach = sierra_startup,
867 .release = sierra_release,
868 .read_int_callback = sierra_instat_callback,
869 };
870
871 /* Functions used by new usb-serial code. */
872 static int __init sierra_init(void)
873 {
874 int retval;
875 retval = usb_serial_register(&sierra_device);
876 if (retval)
877 goto failed_device_register;
878
879
880 retval = usb_register(&sierra_driver);
881 if (retval)
882 goto failed_driver_register;
883
884 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
885 DRIVER_DESC "\n");
886
887 return 0;
888
889 failed_driver_register:
890 usb_serial_deregister(&sierra_device);
891 failed_device_register:
892 return retval;
893 }
894
895 static void __exit sierra_exit(void)
896 {
897 usb_deregister(&sierra_driver);
898 usb_serial_deregister(&sierra_device);
899 }
900
901 module_init(sierra_init);
902 module_exit(sierra_exit);
903
904 MODULE_AUTHOR(DRIVER_AUTHOR);
905 MODULE_DESCRIPTION(DRIVER_DESC);
906 MODULE_VERSION(DRIVER_VERSION);
907 MODULE_LICENSE("GPL");
908
909 module_param(nmea, bool, S_IRUGO | S_IWUSR);
910 MODULE_PARM_DESC(nmea, "NMEA streaming");
911
912 module_param(debug, bool, S_IRUGO | S_IWUSR);
913 MODULE_PARM_DESC(debug, "Debug messages");
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