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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/* Uncomment to log function calls */
20/* #define DEBUG */
21#define DRIVER_VERSION "v.1.7.16"
22#define DRIVER_AUTHOR "Kevin Lloyd, Elina Pasheva, Matthew Safar, Rory Filer"
23#define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
24
25#include <linux/kernel.h>
26#include <linux/jiffies.h>
27#include <linux/errno.h>
28#include <linux/tty.h>
29#include <linux/slab.h>
30#include <linux/tty_flip.h>
31#include <linux/module.h>
32#include <linux/usb.h>
33#include <linux/usb/serial.h>
34
35#define SWIMS_USB_REQUEST_SetPower 0x00
36#define SWIMS_USB_REQUEST_SetNmea 0x07
37
38#define N_IN_URB_HM 8
39#define N_OUT_URB_HM 64
40#define N_IN_URB 4
41#define N_OUT_URB 4
42#define IN_BUFLEN 4096
43
44#define MAX_TRANSFER (PAGE_SIZE - 512)
45/* MAX_TRANSFER is chosen so that the VM is not stressed by
46 allocations > PAGE_SIZE and the number of packets in a page
47 is an integer 512 is the largest possible packet on EHCI */
48
49static int debug;
50static int nmea;
51
52/* Used in interface blacklisting */
53struct sierra_iface_info {
54 const u32 infolen; /* number of interface numbers on blacklist */
55 const u8 *ifaceinfo; /* pointer to the array holding the numbers */
56};
57
58struct sierra_intf_private {
59 spinlock_t susp_lock;
60 unsigned int suspended:1;
61 int in_flight;
62};
63
64static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
65{
66 int result;
67 dev_dbg(&udev->dev, "%s\n", __func__);
68 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
69 SWIMS_USB_REQUEST_SetPower, /* __u8 request */
70 USB_TYPE_VENDOR, /* __u8 request type */
71 swiState, /* __u16 value */
72 0, /* __u16 index */
73 NULL, /* void *data */
74 0, /* __u16 size */
75 USB_CTRL_SET_TIMEOUT); /* int timeout */
76 return result;
77}
78
79static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
80{
81 int result;
82 dev_dbg(&udev->dev, "%s\n", __func__);
83 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
84 SWIMS_USB_REQUEST_SetNmea, /* __u8 request */
85 USB_TYPE_VENDOR, /* __u8 request type */
86 enable, /* __u16 value */
87 0x0000, /* __u16 index */
88 NULL, /* void *data */
89 0, /* __u16 size */
90 USB_CTRL_SET_TIMEOUT); /* int timeout */
91 return result;
92}
93
94static int sierra_calc_num_ports(struct usb_serial *serial)
95{
96 int num_ports = 0;
97 u8 ifnum, numendpoints;
98
99 dev_dbg(&serial->dev->dev, "%s\n", __func__);
100
101 ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
102 numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
103
104 /* Dummy interface present on some SKUs should be ignored */
105 if (ifnum == 0x99)
106 num_ports = 0;
107 else if (numendpoints <= 3)
108 num_ports = 1;
109 else
110 num_ports = (numendpoints-1)/2;
111 return num_ports;
112}
113
114static int is_blacklisted(const u8 ifnum,
115 const struct sierra_iface_info *blacklist)
116{
117 const u8 *info;
118 int i;
119
120 if (blacklist) {
121 info = blacklist->ifaceinfo;
122
123 for (i = 0; i < blacklist->infolen; i++) {
124 if (info[i] == ifnum)
125 return 1;
126 }
127 }
128 return 0;
129}
130
131static int is_himemory(const u8 ifnum,
132 const struct sierra_iface_info *himemorylist)
133{
134 const u8 *info;
135 int i;
136
137 if (himemorylist) {
138 info = himemorylist->ifaceinfo;
139
140 for (i=0; i < himemorylist->infolen; i++) {
141 if (info[i] == ifnum)
142 return 1;
143 }
144 }
145 return 0;
146}
147
148static int sierra_calc_interface(struct usb_serial *serial)
149{
150 int interface;
151 struct usb_interface *p_interface;
152 struct usb_host_interface *p_host_interface;
153 dev_dbg(&serial->dev->dev, "%s\n", __func__);
154
155 /* Get the interface structure pointer from the serial struct */
156 p_interface = serial->interface;
157
158 /* Get a pointer to the host interface structure */
159 p_host_interface = p_interface->cur_altsetting;
160
161 /* read the interface descriptor for this active altsetting
162 * to find out the interface number we are on
163 */
164 interface = p_host_interface->desc.bInterfaceNumber;
165
166 return interface;
167}
168
169static int sierra_probe(struct usb_serial *serial,
170 const struct usb_device_id *id)
171{
172 int result = 0;
173 struct usb_device *udev;
174 struct sierra_intf_private *data;
175 u8 ifnum;
176
177 udev = serial->dev;
178 dev_dbg(&udev->dev, "%s\n", __func__);
179
180 ifnum = sierra_calc_interface(serial);
181 /*
182 * If this interface supports more than 1 alternate
183 * select the 2nd one
184 */
185 if (serial->interface->num_altsetting == 2) {
186 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
187 ifnum);
188 /* We know the alternate setting is 1 for the MC8785 */
189 usb_set_interface(udev, ifnum, 1);
190 }
191
192 /* ifnum could have changed - by calling usb_set_interface */
193 ifnum = sierra_calc_interface(serial);
194
195 if (is_blacklisted(ifnum,
196 (struct sierra_iface_info *)id->driver_info)) {
197 dev_dbg(&serial->dev->dev,
198 "Ignoring blacklisted interface #%d\n", ifnum);
199 return -ENODEV;
200 }
201
202 data = serial->private = kzalloc(sizeof(struct sierra_intf_private), GFP_KERNEL);
203 if (!data)
204 return -ENOMEM;
205 spin_lock_init(&data->susp_lock);
206
207 return result;
208}
209
210/* interfaces with higher memory requirements */
211static const u8 hi_memory_typeA_ifaces[] = { 0, 2 };
212static const struct sierra_iface_info typeA_interface_list = {
213 .infolen = ARRAY_SIZE(hi_memory_typeA_ifaces),
214 .ifaceinfo = hi_memory_typeA_ifaces,
215};
216
217static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 };
218static const struct sierra_iface_info typeB_interface_list = {
219 .infolen = ARRAY_SIZE(hi_memory_typeB_ifaces),
220 .ifaceinfo = hi_memory_typeB_ifaces,
221};
222
223/* 'blacklist' of interfaces not served by this driver */
224static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11 };
225static const struct sierra_iface_info direct_ip_interface_blacklist = {
226 .infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces),
227 .ifaceinfo = direct_ip_non_serial_ifaces,
228};
229
230static const struct usb_device_id id_table[] = {
231 { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
232 { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */
233 { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */
234 { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */
235
236 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
237 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
238 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
239 { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
240 { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
241 { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */
242 { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
243 { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */
244 { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
245 { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
246 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
247 { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
248 { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U */
249 /* Sierra Wireless C597 */
250 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
251 /* Sierra Wireless T598 */
252 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
253 { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */
254 { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */
255 { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */
256 { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */
257
258 { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
259 { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
260 { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
261 { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */
262 { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */
263 { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */
264 { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
265 { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */
266 { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
267 { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */
268 { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
269 { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
270 { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */
271 { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
272 { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
273 { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */
274 { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */
275 { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */
276 { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */
277 { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
278 { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
279 /* Sierra Wireless MC8790, MC8791, MC8792 Composite */
280 { USB_DEVICE(0x1199, 0x683C) },
281 { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
282 /* Sierra Wireless MC8790, MC8791, MC8792 */
283 { USB_DEVICE(0x1199, 0x683E) },
284 { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
285 { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
286 { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
287 { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
288 { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
289 { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
290 { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
291 { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
292 /* Sierra Wireless C885 */
293 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
294 /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */
295 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
296 /* Sierra Wireless C22/C33 */
297 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
298 /* Sierra Wireless HSPA Non-Composite Device */
299 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
300 { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */
301 { USB_DEVICE(0x1199, 0x68A3), /* Sierra Wireless Direct IP modems */
302 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
303 },
304 { USB_DEVICE(0x0f3d, 0x68A3), /* Airprime/Sierra Wireless Direct IP modems */
305 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
306 },
307 { USB_DEVICE(0x413C, 0x08133) }, /* Dell Computer Corp. Wireless 5720 VZW Mobile Broadband (EVDO Rev-A) Minicard GPS Port */
308
309 { }
310};
311MODULE_DEVICE_TABLE(usb, id_table);
312
313
314struct sierra_port_private {
315 spinlock_t lock; /* lock the structure */
316 int outstanding_urbs; /* number of out urbs in flight */
317 struct usb_anchor active;
318 struct usb_anchor delayed;
319
320 int num_out_urbs;
321 int num_in_urbs;
322 /* Input endpoints and buffers for this port */
323 struct urb *in_urbs[N_IN_URB_HM];
324
325 /* Settings for the port */
326 int rts_state; /* Handshaking pins (outputs) */
327 int dtr_state;
328 int cts_state; /* Handshaking pins (inputs) */
329 int dsr_state;
330 int dcd_state;
331 int ri_state;
332 unsigned int opened:1;
333};
334
335static int sierra_send_setup(struct usb_serial_port *port)
336{
337 struct usb_serial *serial = port->serial;
338 struct sierra_port_private *portdata;
339 __u16 interface = 0;
340 int val = 0;
341 int do_send = 0;
342 int retval;
343
344 dev_dbg(&port->dev, "%s\n", __func__);
345
346 portdata = usb_get_serial_port_data(port);
347
348 if (portdata->dtr_state)
349 val |= 0x01;
350 if (portdata->rts_state)
351 val |= 0x02;
352
353 /* If composite device then properly report interface */
354 if (serial->num_ports == 1) {
355 interface = sierra_calc_interface(serial);
356 /* Control message is sent only to interfaces with
357 * interrupt_in endpoints
358 */
359 if (port->interrupt_in_urb) {
360 /* send control message */
361 do_send = 1;
362 }
363 }
364
365 /* Otherwise the need to do non-composite mapping */
366 else {
367 if (port->bulk_out_endpointAddress == 2)
368 interface = 0;
369 else if (port->bulk_out_endpointAddress == 4)
370 interface = 1;
371 else if (port->bulk_out_endpointAddress == 5)
372 interface = 2;
373
374 do_send = 1;
375 }
376 if (!do_send)
377 return 0;
378
379 retval = usb_autopm_get_interface(serial->interface);
380 if (retval < 0)
381 return retval;
382
383 retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
384 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
385 usb_autopm_put_interface(serial->interface);
386
387 return retval;
388}
389
390static void sierra_set_termios(struct tty_struct *tty,
391 struct usb_serial_port *port, struct ktermios *old_termios)
392{
393 dev_dbg(&port->dev, "%s\n", __func__);
394 tty_termios_copy_hw(tty->termios, old_termios);
395 sierra_send_setup(port);
396}
397
398static int sierra_tiocmget(struct tty_struct *tty)
399{
400 struct usb_serial_port *port = tty->driver_data;
401 unsigned int value;
402 struct sierra_port_private *portdata;
403
404 dev_dbg(&port->dev, "%s\n", __func__);
405 portdata = usb_get_serial_port_data(port);
406
407 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
408 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
409 ((portdata->cts_state) ? TIOCM_CTS : 0) |
410 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
411 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
412 ((portdata->ri_state) ? TIOCM_RNG : 0);
413
414 return value;
415}
416
417static int sierra_tiocmset(struct tty_struct *tty,
418 unsigned int set, unsigned int clear)
419{
420 struct usb_serial_port *port = tty->driver_data;
421 struct sierra_port_private *portdata;
422
423 portdata = usb_get_serial_port_data(port);
424
425 if (set & TIOCM_RTS)
426 portdata->rts_state = 1;
427 if (set & TIOCM_DTR)
428 portdata->dtr_state = 1;
429
430 if (clear & TIOCM_RTS)
431 portdata->rts_state = 0;
432 if (clear & TIOCM_DTR)
433 portdata->dtr_state = 0;
434 return sierra_send_setup(port);
435}
436
437static void sierra_release_urb(struct urb *urb)
438{
439 struct usb_serial_port *port;
440 if (urb) {
441 port = urb->context;
442 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
443 kfree(urb->transfer_buffer);
444 usb_free_urb(urb);
445 }
446}
447
448static void sierra_outdat_callback(struct urb *urb)
449{
450 struct usb_serial_port *port = urb->context;
451 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
452 struct sierra_intf_private *intfdata;
453 int status = urb->status;
454
455 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
456 intfdata = port->serial->private;
457
458 /* free up the transfer buffer, as usb_free_urb() does not do this */
459 kfree(urb->transfer_buffer);
460 usb_autopm_put_interface_async(port->serial->interface);
461 if (status)
462 dev_dbg(&port->dev, "%s - nonzero write bulk status "
463 "received: %d\n", __func__, status);
464
465 spin_lock(&portdata->lock);
466 --portdata->outstanding_urbs;
467 spin_unlock(&portdata->lock);
468 spin_lock(&intfdata->susp_lock);
469 --intfdata->in_flight;
470 spin_unlock(&intfdata->susp_lock);
471
472 usb_serial_port_softint(port);
473}
474
475/* Write */
476static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
477 const unsigned char *buf, int count)
478{
479 struct sierra_port_private *portdata;
480 struct sierra_intf_private *intfdata;
481 struct usb_serial *serial = port->serial;
482 unsigned long flags;
483 unsigned char *buffer;
484 struct urb *urb;
485 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
486 int retval = 0;
487
488 /* verify that we actually have some data to write */
489 if (count == 0)
490 return 0;
491
492 portdata = usb_get_serial_port_data(port);
493 intfdata = serial->private;
494
495 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
496 spin_lock_irqsave(&portdata->lock, flags);
497 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
498 portdata->outstanding_urbs);
499 if (portdata->outstanding_urbs > portdata->num_out_urbs) {
500 spin_unlock_irqrestore(&portdata->lock, flags);
501 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
502 return 0;
503 }
504 portdata->outstanding_urbs++;
505 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
506 portdata->outstanding_urbs);
507 spin_unlock_irqrestore(&portdata->lock, flags);
508
509 retval = usb_autopm_get_interface_async(serial->interface);
510 if (retval < 0) {
511 spin_lock_irqsave(&portdata->lock, flags);
512 portdata->outstanding_urbs--;
513 spin_unlock_irqrestore(&portdata->lock, flags);
514 goto error_simple;
515 }
516
517 buffer = kmalloc(writesize, GFP_ATOMIC);
518 if (!buffer) {
519 dev_err(&port->dev, "out of memory\n");
520 retval = -ENOMEM;
521 goto error_no_buffer;
522 }
523
524 urb = usb_alloc_urb(0, GFP_ATOMIC);
525 if (!urb) {
526 dev_err(&port->dev, "no more free urbs\n");
527 retval = -ENOMEM;
528 goto error_no_urb;
529 }
530
531 memcpy(buffer, buf, writesize);
532
533 usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer);
534
535 usb_fill_bulk_urb(urb, serial->dev,
536 usb_sndbulkpipe(serial->dev,
537 port->bulk_out_endpointAddress),
538 buffer, writesize, sierra_outdat_callback, port);
539
540 /* Handle the need to send a zero length packet */
541 urb->transfer_flags |= URB_ZERO_PACKET;
542
543 spin_lock_irqsave(&intfdata->susp_lock, flags);
544
545 if (intfdata->suspended) {
546 usb_anchor_urb(urb, &portdata->delayed);
547 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
548 goto skip_power;
549 } else {
550 usb_anchor_urb(urb, &portdata->active);
551 }
552 /* send it down the pipe */
553 retval = usb_submit_urb(urb, GFP_ATOMIC);
554 if (retval) {
555 usb_unanchor_urb(urb);
556 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
557 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
558 "with status = %d\n", __func__, retval);
559 goto error;
560 } else {
561 intfdata->in_flight++;
562 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
563 }
564
565skip_power:
566 /* we are done with this urb, so let the host driver
567 * really free it when it is finished with it */
568 usb_free_urb(urb);
569
570 return writesize;
571error:
572 usb_free_urb(urb);
573error_no_urb:
574 kfree(buffer);
575error_no_buffer:
576 spin_lock_irqsave(&portdata->lock, flags);
577 --portdata->outstanding_urbs;
578 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
579 portdata->outstanding_urbs);
580 spin_unlock_irqrestore(&portdata->lock, flags);
581 usb_autopm_put_interface_async(serial->interface);
582error_simple:
583 return retval;
584}
585
586static void sierra_indat_callback(struct urb *urb)
587{
588 int err;
589 int endpoint;
590 struct usb_serial_port *port;
591 struct tty_struct *tty;
592 unsigned char *data = urb->transfer_buffer;
593 int status = urb->status;
594
595 endpoint = usb_pipeendpoint(urb->pipe);
596 port = urb->context;
597
598 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
599
600 if (status) {
601 dev_dbg(&port->dev, "%s: nonzero status: %d on"
602 " endpoint %02x\n", __func__, status, endpoint);
603 } else {
604 if (urb->actual_length) {
605 tty = tty_port_tty_get(&port->port);
606 if (tty) {
607 tty_insert_flip_string(tty, data,
608 urb->actual_length);
609 tty_flip_buffer_push(tty);
610
611 tty_kref_put(tty);
612 usb_serial_debug_data(debug, &port->dev,
613 __func__, urb->actual_length, data);
614 }
615 } else {
616 dev_dbg(&port->dev, "%s: empty read urb"
617 " received\n", __func__);
618 }
619 }
620
621 /* Resubmit urb so we continue receiving */
622 if (status != -ESHUTDOWN && status != -EPERM) {
623 usb_mark_last_busy(port->serial->dev);
624 err = usb_submit_urb(urb, GFP_ATOMIC);
625 if (err && err != -EPERM)
626 dev_err(&port->dev, "resubmit read urb failed."
627 "(%d)\n", err);
628 }
629}
630
631static void sierra_instat_callback(struct urb *urb)
632{
633 int err;
634 int status = urb->status;
635 struct usb_serial_port *port = urb->context;
636 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
637 struct usb_serial *serial = port->serial;
638
639 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
640 urb, port, portdata);
641
642 if (status == 0) {
643 struct usb_ctrlrequest *req_pkt =
644 (struct usb_ctrlrequest *)urb->transfer_buffer;
645
646 if (!req_pkt) {
647 dev_dbg(&port->dev, "%s: NULL req_pkt\n",
648 __func__);
649 return;
650 }
651 if ((req_pkt->bRequestType == 0xA1) &&
652 (req_pkt->bRequest == 0x20)) {
653 int old_dcd_state;
654 unsigned char signals = *((unsigned char *)
655 urb->transfer_buffer +
656 sizeof(struct usb_ctrlrequest));
657 struct tty_struct *tty;
658
659 dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
660 signals);
661
662 old_dcd_state = portdata->dcd_state;
663 portdata->cts_state = 1;
664 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
665 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
666 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
667
668 tty = tty_port_tty_get(&port->port);
669 if (tty && !C_CLOCAL(tty) &&
670 old_dcd_state && !portdata->dcd_state)
671 tty_hangup(tty);
672 tty_kref_put(tty);
673 } else {
674 dev_dbg(&port->dev, "%s: type %x req %x\n",
675 __func__, req_pkt->bRequestType,
676 req_pkt->bRequest);
677 }
678 } else
679 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
680
681 /* Resubmit urb so we continue receiving IRQ data */
682 if (status != -ESHUTDOWN && status != -ENOENT) {
683 usb_mark_last_busy(serial->dev);
684 urb->dev = serial->dev;
685 err = usb_submit_urb(urb, GFP_ATOMIC);
686 if (err && err != -EPERM)
687 dev_err(&port->dev, "%s: resubmit intr urb "
688 "failed. (%d)\n", __func__, err);
689 }
690}
691
692static int sierra_write_room(struct tty_struct *tty)
693{
694 struct usb_serial_port *port = tty->driver_data;
695 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
696 unsigned long flags;
697
698 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
699
700 /* try to give a good number back based on if we have any free urbs at
701 * this point in time */
702 spin_lock_irqsave(&portdata->lock, flags);
703 if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) {
704 spin_unlock_irqrestore(&portdata->lock, flags);
705 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
706 return 0;
707 }
708 spin_unlock_irqrestore(&portdata->lock, flags);
709
710 return 2048;
711}
712
713static void sierra_stop_rx_urbs(struct usb_serial_port *port)
714{
715 int i;
716 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
717
718 for (i = 0; i < portdata->num_in_urbs; i++)
719 usb_kill_urb(portdata->in_urbs[i]);
720
721 usb_kill_urb(port->interrupt_in_urb);
722}
723
724static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
725{
726 int ok_cnt;
727 int err = -EINVAL;
728 int i;
729 struct urb *urb;
730 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
731
732 ok_cnt = 0;
733 for (i = 0; i < portdata->num_in_urbs; i++) {
734 urb = portdata->in_urbs[i];
735 if (!urb)
736 continue;
737 err = usb_submit_urb(urb, mem_flags);
738 if (err) {
739 dev_err(&port->dev, "%s: submit urb failed: %d\n",
740 __func__, err);
741 } else {
742 ok_cnt++;
743 }
744 }
745
746 if (ok_cnt && port->interrupt_in_urb) {
747 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
748 if (err) {
749 dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
750 __func__, err);
751 }
752 }
753
754 if (ok_cnt > 0) /* at least one rx urb submitted */
755 return 0;
756 else
757 return err;
758}
759
760static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
761 int dir, void *ctx, int len,
762 gfp_t mem_flags,
763 usb_complete_t callback)
764{
765 struct urb *urb;
766 u8 *buf;
767
768 if (endpoint == -1)
769 return NULL;
770
771 urb = usb_alloc_urb(0, mem_flags);
772 if (urb == NULL) {
773 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n",
774 __func__, endpoint);
775 return NULL;
776 }
777
778 buf = kmalloc(len, mem_flags);
779 if (buf) {
780 /* Fill URB using supplied data */
781 usb_fill_bulk_urb(urb, serial->dev,
782 usb_sndbulkpipe(serial->dev, endpoint) | dir,
783 buf, len, callback, ctx);
784
785 /* debug */
786 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
787 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
788 } else {
789 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__,
790 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
791
792 sierra_release_urb(urb);
793 urb = NULL;
794 }
795
796 return urb;
797}
798
799static void sierra_close(struct usb_serial_port *port)
800{
801 int i;
802 struct usb_serial *serial = port->serial;
803 struct sierra_port_private *portdata;
804 struct sierra_intf_private *intfdata = port->serial->private;
805
806
807 dev_dbg(&port->dev, "%s\n", __func__);
808 portdata = usb_get_serial_port_data(port);
809
810 portdata->rts_state = 0;
811 portdata->dtr_state = 0;
812
813 if (serial->dev) {
814 mutex_lock(&serial->disc_mutex);
815 if (!serial->disconnected) {
816 serial->interface->needs_remote_wakeup = 0;
817 /* odd error handling due to pm counters */
818 if (!usb_autopm_get_interface(serial->interface))
819 sierra_send_setup(port);
820 else
821 usb_autopm_get_interface_no_resume(serial->interface);
822
823 }
824 mutex_unlock(&serial->disc_mutex);
825 spin_lock_irq(&intfdata->susp_lock);
826 portdata->opened = 0;
827 spin_unlock_irq(&intfdata->susp_lock);
828
829
830 /* Stop reading urbs */
831 sierra_stop_rx_urbs(port);
832 /* .. and release them */
833 for (i = 0; i < portdata->num_in_urbs; i++) {
834 sierra_release_urb(portdata->in_urbs[i]);
835 portdata->in_urbs[i] = NULL;
836 }
837 }
838}
839
840static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
841{
842 struct sierra_port_private *portdata;
843 struct usb_serial *serial = port->serial;
844 struct sierra_intf_private *intfdata = serial->private;
845 int i;
846 int err;
847 int endpoint;
848 struct urb *urb;
849
850 portdata = usb_get_serial_port_data(port);
851
852 dev_dbg(&port->dev, "%s\n", __func__);
853
854 /* Set some sane defaults */
855 portdata->rts_state = 1;
856 portdata->dtr_state = 1;
857
858
859 endpoint = port->bulk_in_endpointAddress;
860 for (i = 0; i < portdata->num_in_urbs; i++) {
861 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
862 IN_BUFLEN, GFP_KERNEL,
863 sierra_indat_callback);
864 portdata->in_urbs[i] = urb;
865 }
866 /* clear halt condition */
867 usb_clear_halt(serial->dev,
868 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
869
870 err = sierra_submit_rx_urbs(port, GFP_KERNEL);
871 if (err) {
872 /* get rid of everything as in close */
873 sierra_close(port);
874 /* restore balance for autopm */
875 if (!serial->disconnected)
876 usb_autopm_put_interface(serial->interface);
877 return err;
878 }
879 sierra_send_setup(port);
880
881 serial->interface->needs_remote_wakeup = 1;
882 spin_lock_irq(&intfdata->susp_lock);
883 portdata->opened = 1;
884 spin_unlock_irq(&intfdata->susp_lock);
885 usb_autopm_put_interface(serial->interface);
886
887 return 0;
888}
889
890
891static void sierra_dtr_rts(struct usb_serial_port *port, int on)
892{
893 struct usb_serial *serial = port->serial;
894 struct sierra_port_private *portdata;
895
896 portdata = usb_get_serial_port_data(port);
897 portdata->rts_state = on;
898 portdata->dtr_state = on;
899
900 if (serial->dev) {
901 mutex_lock(&serial->disc_mutex);
902 if (!serial->disconnected)
903 sierra_send_setup(port);
904 mutex_unlock(&serial->disc_mutex);
905 }
906}
907
908static int sierra_startup(struct usb_serial *serial)
909{
910 struct usb_serial_port *port;
911 struct sierra_port_private *portdata;
912 struct sierra_iface_info *himemoryp = NULL;
913 int i;
914 u8 ifnum;
915
916 dev_dbg(&serial->dev->dev, "%s\n", __func__);
917
918 /* Set Device mode to D0 */
919 sierra_set_power_state(serial->dev, 0x0000);
920
921 /* Check NMEA and set */
922 if (nmea)
923 sierra_vsc_set_nmea(serial->dev, 1);
924
925 /* Now setup per port private data */
926 for (i = 0; i < serial->num_ports; i++) {
927 port = serial->port[i];
928 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
929 if (!portdata) {
930 dev_dbg(&port->dev, "%s: kmalloc for "
931 "sierra_port_private (%d) failed!\n",
932 __func__, i);
933 return -ENOMEM;
934 }
935 spin_lock_init(&portdata->lock);
936 init_usb_anchor(&portdata->active);
937 init_usb_anchor(&portdata->delayed);
938 ifnum = i;
939 /* Assume low memory requirements */
940 portdata->num_out_urbs = N_OUT_URB;
941 portdata->num_in_urbs = N_IN_URB;
942
943 /* Determine actual memory requirements */
944 if (serial->num_ports == 1) {
945 /* Get interface number for composite device */
946 ifnum = sierra_calc_interface(serial);
947 himemoryp =
948 (struct sierra_iface_info *)&typeB_interface_list;
949 if (is_himemory(ifnum, himemoryp)) {
950 portdata->num_out_urbs = N_OUT_URB_HM;
951 portdata->num_in_urbs = N_IN_URB_HM;
952 }
953 }
954 else {
955 himemoryp =
956 (struct sierra_iface_info *)&typeA_interface_list;
957 if (is_himemory(i, himemoryp)) {
958 portdata->num_out_urbs = N_OUT_URB_HM;
959 portdata->num_in_urbs = N_IN_URB_HM;
960 }
961 }
962 dev_dbg(&serial->dev->dev,
963 "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
964 ifnum,portdata->num_in_urbs, portdata->num_out_urbs );
965 /* Set the port private data pointer */
966 usb_set_serial_port_data(port, portdata);
967 }
968
969 return 0;
970}
971
972static void sierra_release(struct usb_serial *serial)
973{
974 int i;
975 struct usb_serial_port *port;
976 struct sierra_port_private *portdata;
977
978 dev_dbg(&serial->dev->dev, "%s\n", __func__);
979
980 for (i = 0; i < serial->num_ports; ++i) {
981 port = serial->port[i];
982 if (!port)
983 continue;
984 portdata = usb_get_serial_port_data(port);
985 if (!portdata)
986 continue;
987 kfree(portdata);
988 }
989}
990
991#ifdef CONFIG_PM
992static void stop_read_write_urbs(struct usb_serial *serial)
993{
994 int i;
995 struct usb_serial_port *port;
996 struct sierra_port_private *portdata;
997
998 /* Stop reading/writing urbs */
999 for (i = 0; i < serial->num_ports; ++i) {
1000 port = serial->port[i];
1001 portdata = usb_get_serial_port_data(port);
1002 sierra_stop_rx_urbs(port);
1003 usb_kill_anchored_urbs(&portdata->active);
1004 }
1005}
1006
1007static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
1008{
1009 struct sierra_intf_private *intfdata;
1010 int b;
1011
1012 if (message.event & PM_EVENT_AUTO) {
1013 intfdata = serial->private;
1014 spin_lock_irq(&intfdata->susp_lock);
1015 b = intfdata->in_flight;
1016
1017 if (b) {
1018 spin_unlock_irq(&intfdata->susp_lock);
1019 return -EBUSY;
1020 } else {
1021 intfdata->suspended = 1;
1022 spin_unlock_irq(&intfdata->susp_lock);
1023 }
1024 }
1025 stop_read_write_urbs(serial);
1026
1027 return 0;
1028}
1029
1030static int sierra_resume(struct usb_serial *serial)
1031{
1032 struct usb_serial_port *port;
1033 struct sierra_intf_private *intfdata = serial->private;
1034 struct sierra_port_private *portdata;
1035 struct urb *urb;
1036 int ec = 0;
1037 int i, err;
1038
1039 spin_lock_irq(&intfdata->susp_lock);
1040 for (i = 0; i < serial->num_ports; i++) {
1041 port = serial->port[i];
1042 portdata = usb_get_serial_port_data(port);
1043
1044 while ((urb = usb_get_from_anchor(&portdata->delayed))) {
1045 usb_anchor_urb(urb, &portdata->active);
1046 intfdata->in_flight++;
1047 err = usb_submit_urb(urb, GFP_ATOMIC);
1048 if (err < 0) {
1049 intfdata->in_flight--;
1050 usb_unanchor_urb(urb);
1051 usb_scuttle_anchored_urbs(&portdata->delayed);
1052 break;
1053 }
1054 }
1055
1056 if (portdata->opened) {
1057 err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
1058 if (err)
1059 ec++;
1060 }
1061 }
1062 intfdata->suspended = 0;
1063 spin_unlock_irq(&intfdata->susp_lock);
1064
1065 return ec ? -EIO : 0;
1066}
1067
1068static int sierra_reset_resume(struct usb_interface *intf)
1069{
1070 struct usb_serial *serial = usb_get_intfdata(intf);
1071 dev_err(&serial->dev->dev, "%s\n", __func__);
1072 return usb_serial_resume(intf);
1073}
1074#else
1075#define sierra_suspend NULL
1076#define sierra_resume NULL
1077#define sierra_reset_resume NULL
1078#endif
1079
1080static struct usb_driver sierra_driver = {
1081 .name = "sierra",
1082 .probe = usb_serial_probe,
1083 .disconnect = usb_serial_disconnect,
1084 .suspend = usb_serial_suspend,
1085 .resume = usb_serial_resume,
1086 .reset_resume = sierra_reset_resume,
1087 .id_table = id_table,
1088 .no_dynamic_id = 1,
1089 .supports_autosuspend = 1,
1090};
1091
1092static struct usb_serial_driver sierra_device = {
1093 .driver = {
1094 .owner = THIS_MODULE,
1095 .name = "sierra",
1096 },
1097 .description = "Sierra USB modem",
1098 .id_table = id_table,
1099 .usb_driver = &sierra_driver,
1100 .calc_num_ports = sierra_calc_num_ports,
1101 .probe = sierra_probe,
1102 .open = sierra_open,
1103 .close = sierra_close,
1104 .dtr_rts = sierra_dtr_rts,
1105 .write = sierra_write,
1106 .write_room = sierra_write_room,
1107 .set_termios = sierra_set_termios,
1108 .tiocmget = sierra_tiocmget,
1109 .tiocmset = sierra_tiocmset,
1110 .attach = sierra_startup,
1111 .release = sierra_release,
1112 .suspend = sierra_suspend,
1113 .resume = sierra_resume,
1114 .read_int_callback = sierra_instat_callback,
1115};
1116
1117/* Functions used by new usb-serial code. */
1118static int __init sierra_init(void)
1119{
1120 int retval;
1121 retval = usb_serial_register(&sierra_device);
1122 if (retval)
1123 goto failed_device_register;
1124
1125
1126 retval = usb_register(&sierra_driver);
1127 if (retval)
1128 goto failed_driver_register;
1129
1130 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1131 DRIVER_DESC "\n");
1132
1133 return 0;
1134
1135failed_driver_register:
1136 usb_serial_deregister(&sierra_device);
1137failed_device_register:
1138 return retval;
1139}
1140
1141static void __exit sierra_exit(void)
1142{
1143 usb_deregister(&sierra_driver);
1144 usb_serial_deregister(&sierra_device);
1145}
1146
1147module_init(sierra_init);
1148module_exit(sierra_exit);
1149
1150MODULE_AUTHOR(DRIVER_AUTHOR);
1151MODULE_DESCRIPTION(DRIVER_DESC);
1152MODULE_VERSION(DRIVER_VERSION);
1153MODULE_LICENSE("GPL");
1154
1155module_param(nmea, bool, S_IRUGO | S_IWUSR);
1156MODULE_PARM_DESC(nmea, "NMEA streaming");
1157
1158module_param(debug, bool, S_IRUGO | S_IWUSR);
1159MODULE_PARM_DESC(debug, "Debug messages");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 USB Driver for Sierra Wireless
4
5 Copyright (C) 2006, 2007, 2008 Kevin Lloyd <klloyd@sierrawireless.com>,
6
7 Copyright (C) 2008, 2009 Elina Pasheva, Matthew Safar, Rory Filer
8 <linux@sierrawireless.com>
9
10 IMPORTANT DISCLAIMER: This driver is not commercially supported by
11 Sierra Wireless. Use at your own risk.
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/* Uncomment to log function calls */
17/* #define DEBUG */
18
19#define DRIVER_AUTHOR "Kevin Lloyd, Elina Pasheva, Matthew Safar, Rory Filer"
20#define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
21
22#include <linux/kernel.h>
23#include <linux/jiffies.h>
24#include <linux/errno.h>
25#include <linux/tty.h>
26#include <linux/slab.h>
27#include <linux/tty_flip.h>
28#include <linux/module.h>
29#include <linux/usb.h>
30#include <linux/usb/serial.h>
31
32#define SWIMS_USB_REQUEST_SetPower 0x00
33#define SWIMS_USB_REQUEST_SetNmea 0x07
34
35#define N_IN_URB_HM 8
36#define N_OUT_URB_HM 64
37#define N_IN_URB 4
38#define N_OUT_URB 4
39#define IN_BUFLEN 4096
40
41#define MAX_TRANSFER (PAGE_SIZE - 512)
42/* MAX_TRANSFER is chosen so that the VM is not stressed by
43 allocations > PAGE_SIZE and the number of packets in a page
44 is an integer 512 is the largest possible packet on EHCI */
45
46static bool nmea;
47
48struct sierra_iface_list {
49 const u8 *nums; /* array of interface numbers */
50 size_t count; /* number of elements in array */
51};
52
53struct sierra_intf_private {
54 spinlock_t susp_lock;
55 unsigned int suspended:1;
56 int in_flight;
57 unsigned int open_ports;
58};
59
60static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
61{
62 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
63 SWIMS_USB_REQUEST_SetPower, /* __u8 request */
64 USB_TYPE_VENDOR, /* __u8 request type */
65 swiState, /* __u16 value */
66 0, /* __u16 index */
67 NULL, /* void *data */
68 0, /* __u16 size */
69 USB_CTRL_SET_TIMEOUT); /* int timeout */
70}
71
72static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
73{
74 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
75 SWIMS_USB_REQUEST_SetNmea, /* __u8 request */
76 USB_TYPE_VENDOR, /* __u8 request type */
77 enable, /* __u16 value */
78 0x0000, /* __u16 index */
79 NULL, /* void *data */
80 0, /* __u16 size */
81 USB_CTRL_SET_TIMEOUT); /* int timeout */
82}
83
84static int sierra_calc_num_ports(struct usb_serial *serial,
85 struct usb_serial_endpoints *epds)
86{
87 int num_ports = 0;
88 u8 ifnum, numendpoints;
89
90 ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
91 numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
92
93 /* Dummy interface present on some SKUs should be ignored */
94 if (ifnum == 0x99)
95 num_ports = 0;
96 else if (numendpoints <= 3)
97 num_ports = 1;
98 else
99 num_ports = (numendpoints-1)/2;
100 return num_ports;
101}
102
103static bool is_listed(const u8 ifnum, const struct sierra_iface_list *list)
104{
105 int i;
106
107 if (!list)
108 return false;
109
110 for (i = 0; i < list->count; i++) {
111 if (list->nums[i] == ifnum)
112 return true;
113 }
114
115 return false;
116}
117
118static u8 sierra_interface_num(struct usb_serial *serial)
119{
120 return serial->interface->cur_altsetting->desc.bInterfaceNumber;
121}
122
123static int sierra_probe(struct usb_serial *serial,
124 const struct usb_device_id *id)
125{
126 const struct sierra_iface_list *ignore_list;
127 int result = 0;
128 struct usb_device *udev;
129 u8 ifnum;
130
131 udev = serial->dev;
132 ifnum = sierra_interface_num(serial);
133
134 /*
135 * If this interface supports more than 1 alternate
136 * select the 2nd one
137 */
138 if (serial->interface->num_altsetting == 2) {
139 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
140 ifnum);
141 /* We know the alternate setting is 1 for the MC8785 */
142 usb_set_interface(udev, ifnum, 1);
143 }
144
145 ignore_list = (const struct sierra_iface_list *)id->driver_info;
146
147 if (is_listed(ifnum, ignore_list)) {
148 dev_dbg(&serial->dev->dev, "Ignoring interface #%d\n", ifnum);
149 return -ENODEV;
150 }
151
152 return result;
153}
154
155/* interfaces with higher memory requirements */
156static const u8 hi_memory_typeA_ifaces[] = { 0, 2 };
157static const struct sierra_iface_list typeA_interface_list = {
158 .nums = hi_memory_typeA_ifaces,
159 .count = ARRAY_SIZE(hi_memory_typeA_ifaces),
160};
161
162static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 };
163static const struct sierra_iface_list typeB_interface_list = {
164 .nums = hi_memory_typeB_ifaces,
165 .count = ARRAY_SIZE(hi_memory_typeB_ifaces),
166};
167
168/* 'ignorelist' of interfaces not served by this driver */
169static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11, 19, 20 };
170static const struct sierra_iface_list direct_ip_interface_ignore = {
171 .nums = direct_ip_non_serial_ifaces,
172 .count = ARRAY_SIZE(direct_ip_non_serial_ifaces),
173};
174
175static const struct usb_device_id id_table[] = {
176 { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
177 { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */
178 { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */
179 { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */
180
181 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
182 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
183 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
184 { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
185 { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
186 { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */
187 { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
188 { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */
189 { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
190 { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
191 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
192 { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
193 { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U */
194 /* Sierra Wireless C597 */
195 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
196 /* Sierra Wireless T598 */
197 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
198 { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */
199 { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */
200 { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */
201 { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */
202
203 { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
204 { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
205 { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
206 { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */
207 { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */
208 { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */
209 { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
210 { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */
211 { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
212 { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */
213 { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
214 { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
215 { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */
216 { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
217 { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
218 { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */
219 { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */
220 { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */
221 { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */
222 { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
223 { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
224 /* Sierra Wireless MC8790, MC8791, MC8792 Composite */
225 { USB_DEVICE(0x1199, 0x683C) },
226 { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
227 /* Sierra Wireless MC8790, MC8791, MC8792 */
228 { USB_DEVICE(0x1199, 0x683E) },
229 { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
230 { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
231 { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
232 { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
233 { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
234 { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
235 { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
236 { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
237 /* Sierra Wireless C885 */
238 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
239 /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */
240 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
241 /* Sierra Wireless C22/C33 */
242 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
243 /* Sierra Wireless HSPA Non-Composite Device */
244 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
245 { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */
246 /* Sierra Wireless Direct IP modems */
247 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x68A3, 0xFF, 0xFF, 0xFF),
248 .driver_info = (kernel_ulong_t)&direct_ip_interface_ignore
249 },
250 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x68AA, 0xFF, 0xFF, 0xFF),
251 .driver_info = (kernel_ulong_t)&direct_ip_interface_ignore
252 },
253 { USB_DEVICE(0x1199, 0x68AB) }, /* Sierra Wireless AR8550 */
254 /* AT&T Direct IP LTE modems */
255 { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68AA, 0xFF, 0xFF, 0xFF),
256 .driver_info = (kernel_ulong_t)&direct_ip_interface_ignore
257 },
258 /* Airprime/Sierra Wireless Direct IP modems */
259 { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68A3, 0xFF, 0xFF, 0xFF),
260 .driver_info = (kernel_ulong_t)&direct_ip_interface_ignore
261 },
262
263 { }
264};
265MODULE_DEVICE_TABLE(usb, id_table);
266
267
268struct sierra_port_private {
269 spinlock_t lock; /* lock the structure */
270 int outstanding_urbs; /* number of out urbs in flight */
271 struct usb_anchor active;
272 struct usb_anchor delayed;
273
274 int num_out_urbs;
275 int num_in_urbs;
276 /* Input endpoints and buffers for this port */
277 struct urb *in_urbs[N_IN_URB_HM];
278
279 /* Settings for the port */
280 int rts_state; /* Handshaking pins (outputs) */
281 int dtr_state;
282 int cts_state; /* Handshaking pins (inputs) */
283 int dsr_state;
284 int dcd_state;
285 int ri_state;
286};
287
288static int sierra_send_setup(struct usb_serial_port *port)
289{
290 struct usb_serial *serial = port->serial;
291 struct sierra_port_private *portdata;
292 __u16 interface = 0;
293 int val = 0;
294 int do_send = 0;
295 int retval;
296
297 portdata = usb_get_serial_port_data(port);
298
299 if (portdata->dtr_state)
300 val |= 0x01;
301 if (portdata->rts_state)
302 val |= 0x02;
303
304 /* If composite device then properly report interface */
305 if (serial->num_ports == 1) {
306 interface = sierra_interface_num(serial);
307 /* Control message is sent only to interfaces with
308 * interrupt_in endpoints
309 */
310 if (port->interrupt_in_urb) {
311 /* send control message */
312 do_send = 1;
313 }
314 }
315
316 /* Otherwise the need to do non-composite mapping */
317 else {
318 if (port->bulk_out_endpointAddress == 2)
319 interface = 0;
320 else if (port->bulk_out_endpointAddress == 4)
321 interface = 1;
322 else if (port->bulk_out_endpointAddress == 5)
323 interface = 2;
324
325 do_send = 1;
326 }
327 if (!do_send)
328 return 0;
329
330 retval = usb_autopm_get_interface(serial->interface);
331 if (retval < 0)
332 return retval;
333
334 retval = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
335 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
336 usb_autopm_put_interface(serial->interface);
337
338 return retval;
339}
340
341static int sierra_tiocmget(struct tty_struct *tty)
342{
343 struct usb_serial_port *port = tty->driver_data;
344 unsigned int value;
345 struct sierra_port_private *portdata;
346
347 portdata = usb_get_serial_port_data(port);
348
349 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
350 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
351 ((portdata->cts_state) ? TIOCM_CTS : 0) |
352 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
353 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
354 ((portdata->ri_state) ? TIOCM_RNG : 0);
355
356 return value;
357}
358
359static int sierra_tiocmset(struct tty_struct *tty,
360 unsigned int set, unsigned int clear)
361{
362 struct usb_serial_port *port = tty->driver_data;
363 struct sierra_port_private *portdata;
364
365 portdata = usb_get_serial_port_data(port);
366
367 if (set & TIOCM_RTS)
368 portdata->rts_state = 1;
369 if (set & TIOCM_DTR)
370 portdata->dtr_state = 1;
371
372 if (clear & TIOCM_RTS)
373 portdata->rts_state = 0;
374 if (clear & TIOCM_DTR)
375 portdata->dtr_state = 0;
376 return sierra_send_setup(port);
377}
378
379static void sierra_release_urb(struct urb *urb)
380{
381 if (urb) {
382 kfree(urb->transfer_buffer);
383 usb_free_urb(urb);
384 }
385}
386
387static void sierra_outdat_callback(struct urb *urb)
388{
389 struct usb_serial_port *port = urb->context;
390 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
391 struct sierra_intf_private *intfdata;
392 int status = urb->status;
393 unsigned long flags;
394
395 intfdata = usb_get_serial_data(port->serial);
396
397 /* free up the transfer buffer, as usb_free_urb() does not do this */
398 kfree(urb->transfer_buffer);
399 usb_autopm_put_interface_async(port->serial->interface);
400 if (status)
401 dev_dbg(&port->dev, "%s - nonzero write bulk status "
402 "received: %d\n", __func__, status);
403
404 spin_lock_irqsave(&portdata->lock, flags);
405 --portdata->outstanding_urbs;
406 spin_unlock_irqrestore(&portdata->lock, flags);
407 spin_lock_irqsave(&intfdata->susp_lock, flags);
408 --intfdata->in_flight;
409 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
410
411 usb_serial_port_softint(port);
412}
413
414/* Write */
415static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
416 const unsigned char *buf, int count)
417{
418 struct sierra_port_private *portdata;
419 struct sierra_intf_private *intfdata;
420 struct usb_serial *serial = port->serial;
421 unsigned long flags;
422 unsigned char *buffer;
423 struct urb *urb;
424 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
425 int retval = 0;
426
427 /* verify that we actually have some data to write */
428 if (count == 0)
429 return 0;
430
431 portdata = usb_get_serial_port_data(port);
432 intfdata = usb_get_serial_data(serial);
433
434 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
435 spin_lock_irqsave(&portdata->lock, flags);
436 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
437 portdata->outstanding_urbs);
438 if (portdata->outstanding_urbs > portdata->num_out_urbs) {
439 spin_unlock_irqrestore(&portdata->lock, flags);
440 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
441 return 0;
442 }
443 portdata->outstanding_urbs++;
444 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
445 portdata->outstanding_urbs);
446 spin_unlock_irqrestore(&portdata->lock, flags);
447
448 retval = usb_autopm_get_interface_async(serial->interface);
449 if (retval < 0) {
450 spin_lock_irqsave(&portdata->lock, flags);
451 portdata->outstanding_urbs--;
452 spin_unlock_irqrestore(&portdata->lock, flags);
453 goto error_simple;
454 }
455
456 buffer = kmalloc(writesize, GFP_ATOMIC);
457 if (!buffer) {
458 retval = -ENOMEM;
459 goto error_no_buffer;
460 }
461
462 urb = usb_alloc_urb(0, GFP_ATOMIC);
463 if (!urb) {
464 retval = -ENOMEM;
465 goto error_no_urb;
466 }
467
468 memcpy(buffer, buf, writesize);
469
470 usb_serial_debug_data(&port->dev, __func__, writesize, buffer);
471
472 usb_fill_bulk_urb(urb, serial->dev,
473 usb_sndbulkpipe(serial->dev,
474 port->bulk_out_endpointAddress),
475 buffer, writesize, sierra_outdat_callback, port);
476
477 /* Handle the need to send a zero length packet */
478 urb->transfer_flags |= URB_ZERO_PACKET;
479
480 spin_lock_irqsave(&intfdata->susp_lock, flags);
481
482 if (intfdata->suspended) {
483 usb_anchor_urb(urb, &portdata->delayed);
484 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
485 goto skip_power;
486 } else {
487 usb_anchor_urb(urb, &portdata->active);
488 }
489 /* send it down the pipe */
490 retval = usb_submit_urb(urb, GFP_ATOMIC);
491 if (retval) {
492 usb_unanchor_urb(urb);
493 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
494 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
495 "with status = %d\n", __func__, retval);
496 goto error;
497 } else {
498 intfdata->in_flight++;
499 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
500 }
501
502skip_power:
503 /* we are done with this urb, so let the host driver
504 * really free it when it is finished with it */
505 usb_free_urb(urb);
506
507 return writesize;
508error:
509 usb_free_urb(urb);
510error_no_urb:
511 kfree(buffer);
512error_no_buffer:
513 spin_lock_irqsave(&portdata->lock, flags);
514 --portdata->outstanding_urbs;
515 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
516 portdata->outstanding_urbs);
517 spin_unlock_irqrestore(&portdata->lock, flags);
518 usb_autopm_put_interface_async(serial->interface);
519error_simple:
520 return retval;
521}
522
523static void sierra_indat_callback(struct urb *urb)
524{
525 int err;
526 int endpoint;
527 struct usb_serial_port *port;
528 unsigned char *data = urb->transfer_buffer;
529 int status = urb->status;
530
531 endpoint = usb_pipeendpoint(urb->pipe);
532 port = urb->context;
533
534 if (status) {
535 dev_dbg(&port->dev, "%s: nonzero status: %d on"
536 " endpoint %02x\n", __func__, status, endpoint);
537 } else {
538 if (urb->actual_length) {
539 tty_insert_flip_string(&port->port, data,
540 urb->actual_length);
541 tty_flip_buffer_push(&port->port);
542
543 usb_serial_debug_data(&port->dev, __func__,
544 urb->actual_length, data);
545 } else {
546 dev_dbg(&port->dev, "%s: empty read urb"
547 " received\n", __func__);
548 }
549 }
550
551 /* Resubmit urb so we continue receiving */
552 if (status != -ESHUTDOWN && status != -EPERM) {
553 usb_mark_last_busy(port->serial->dev);
554 err = usb_submit_urb(urb, GFP_ATOMIC);
555 if (err && err != -EPERM)
556 dev_err(&port->dev, "resubmit read urb failed."
557 "(%d)\n", err);
558 }
559}
560
561static void sierra_instat_callback(struct urb *urb)
562{
563 int err;
564 int status = urb->status;
565 struct usb_serial_port *port = urb->context;
566 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
567 struct usb_serial *serial = port->serial;
568
569 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
570 urb, port, portdata);
571
572 if (status == 0) {
573 struct usb_ctrlrequest *req_pkt = urb->transfer_buffer;
574
575 if (!req_pkt) {
576 dev_dbg(&port->dev, "%s: NULL req_pkt\n",
577 __func__);
578 return;
579 }
580 if ((req_pkt->bRequestType == 0xA1) &&
581 (req_pkt->bRequest == 0x20)) {
582 int old_dcd_state;
583 unsigned char signals = *((unsigned char *)
584 urb->transfer_buffer +
585 sizeof(struct usb_ctrlrequest));
586
587 dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
588 signals);
589
590 old_dcd_state = portdata->dcd_state;
591 portdata->cts_state = 1;
592 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
593 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
594 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
595
596 if (old_dcd_state && !portdata->dcd_state)
597 tty_port_tty_hangup(&port->port, true);
598 } else {
599 dev_dbg(&port->dev, "%s: type %x req %x\n",
600 __func__, req_pkt->bRequestType,
601 req_pkt->bRequest);
602 }
603 } else
604 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
605
606 /* Resubmit urb so we continue receiving IRQ data */
607 if (status != -ESHUTDOWN && status != -ENOENT) {
608 usb_mark_last_busy(serial->dev);
609 err = usb_submit_urb(urb, GFP_ATOMIC);
610 if (err && err != -EPERM)
611 dev_err(&port->dev, "%s: resubmit intr urb "
612 "failed. (%d)\n", __func__, err);
613 }
614}
615
616static unsigned int sierra_write_room(struct tty_struct *tty)
617{
618 struct usb_serial_port *port = tty->driver_data;
619 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
620 unsigned long flags;
621
622 /* try to give a good number back based on if we have any free urbs at
623 * this point in time */
624 spin_lock_irqsave(&portdata->lock, flags);
625 if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) {
626 spin_unlock_irqrestore(&portdata->lock, flags);
627 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
628 return 0;
629 }
630 spin_unlock_irqrestore(&portdata->lock, flags);
631
632 return 2048;
633}
634
635static unsigned int sierra_chars_in_buffer(struct tty_struct *tty)
636{
637 struct usb_serial_port *port = tty->driver_data;
638 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
639 unsigned long flags;
640 unsigned int chars;
641
642 /* NOTE: This overcounts somewhat. */
643 spin_lock_irqsave(&portdata->lock, flags);
644 chars = portdata->outstanding_urbs * MAX_TRANSFER;
645 spin_unlock_irqrestore(&portdata->lock, flags);
646
647 dev_dbg(&port->dev, "%s - %u\n", __func__, chars);
648
649 return chars;
650}
651
652static void sierra_stop_rx_urbs(struct usb_serial_port *port)
653{
654 int i;
655 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
656
657 for (i = 0; i < portdata->num_in_urbs; i++)
658 usb_kill_urb(portdata->in_urbs[i]);
659
660 usb_kill_urb(port->interrupt_in_urb);
661}
662
663static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
664{
665 int ok_cnt;
666 int err = -EINVAL;
667 int i;
668 struct urb *urb;
669 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
670
671 ok_cnt = 0;
672 for (i = 0; i < portdata->num_in_urbs; i++) {
673 urb = portdata->in_urbs[i];
674 if (!urb)
675 continue;
676 err = usb_submit_urb(urb, mem_flags);
677 if (err) {
678 dev_err(&port->dev, "%s: submit urb failed: %d\n",
679 __func__, err);
680 } else {
681 ok_cnt++;
682 }
683 }
684
685 if (ok_cnt && port->interrupt_in_urb) {
686 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
687 if (err) {
688 dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
689 __func__, err);
690 }
691 }
692
693 if (ok_cnt > 0) /* at least one rx urb submitted */
694 return 0;
695 else
696 return err;
697}
698
699static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
700 int dir, void *ctx, int len,
701 gfp_t mem_flags,
702 usb_complete_t callback)
703{
704 struct urb *urb;
705 u8 *buf;
706
707 urb = usb_alloc_urb(0, mem_flags);
708 if (!urb)
709 return NULL;
710
711 buf = kmalloc(len, mem_flags);
712 if (buf) {
713 /* Fill URB using supplied data */
714 usb_fill_bulk_urb(urb, serial->dev,
715 usb_sndbulkpipe(serial->dev, endpoint) | dir,
716 buf, len, callback, ctx);
717
718 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
719 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
720 } else {
721 sierra_release_urb(urb);
722 urb = NULL;
723 }
724
725 return urb;
726}
727
728static void sierra_close(struct usb_serial_port *port)
729{
730 int i;
731 struct usb_serial *serial = port->serial;
732 struct sierra_port_private *portdata;
733 struct sierra_intf_private *intfdata = usb_get_serial_data(serial);
734 struct urb *urb;
735
736 portdata = usb_get_serial_port_data(port);
737
738 /*
739 * Need to take susp_lock to make sure port is not already being
740 * resumed, but no need to hold it due to initialized
741 */
742 spin_lock_irq(&intfdata->susp_lock);
743 if (--intfdata->open_ports == 0)
744 serial->interface->needs_remote_wakeup = 0;
745 spin_unlock_irq(&intfdata->susp_lock);
746
747 for (;;) {
748 urb = usb_get_from_anchor(&portdata->delayed);
749 if (!urb)
750 break;
751 kfree(urb->transfer_buffer);
752 usb_free_urb(urb);
753 usb_autopm_put_interface_async(serial->interface);
754 spin_lock_irq(&portdata->lock);
755 portdata->outstanding_urbs--;
756 spin_unlock_irq(&portdata->lock);
757 }
758
759 sierra_stop_rx_urbs(port);
760 usb_kill_anchored_urbs(&portdata->active);
761
762 for (i = 0; i < portdata->num_in_urbs; i++) {
763 sierra_release_urb(portdata->in_urbs[i]);
764 portdata->in_urbs[i] = NULL;
765 }
766
767 usb_autopm_get_interface_no_resume(serial->interface);
768}
769
770static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
771{
772 struct sierra_port_private *portdata;
773 struct usb_serial *serial = port->serial;
774 struct sierra_intf_private *intfdata = usb_get_serial_data(serial);
775 int i;
776 int err;
777 int endpoint;
778 struct urb *urb;
779
780 portdata = usb_get_serial_port_data(port);
781
782 endpoint = port->bulk_in_endpointAddress;
783 for (i = 0; i < portdata->num_in_urbs; i++) {
784 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
785 IN_BUFLEN, GFP_KERNEL,
786 sierra_indat_callback);
787 portdata->in_urbs[i] = urb;
788 }
789 /* clear halt condition */
790 usb_clear_halt(serial->dev,
791 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
792
793 err = sierra_submit_rx_urbs(port, GFP_KERNEL);
794 if (err)
795 goto err_submit;
796
797 spin_lock_irq(&intfdata->susp_lock);
798 if (++intfdata->open_ports == 1)
799 serial->interface->needs_remote_wakeup = 1;
800 spin_unlock_irq(&intfdata->susp_lock);
801 usb_autopm_put_interface(serial->interface);
802
803 return 0;
804
805err_submit:
806 sierra_stop_rx_urbs(port);
807
808 for (i = 0; i < portdata->num_in_urbs; i++) {
809 sierra_release_urb(portdata->in_urbs[i]);
810 portdata->in_urbs[i] = NULL;
811 }
812
813 return err;
814}
815
816
817static void sierra_dtr_rts(struct usb_serial_port *port, int on)
818{
819 struct sierra_port_private *portdata;
820
821 portdata = usb_get_serial_port_data(port);
822 portdata->rts_state = on;
823 portdata->dtr_state = on;
824
825 sierra_send_setup(port);
826}
827
828static int sierra_startup(struct usb_serial *serial)
829{
830 struct sierra_intf_private *intfdata;
831
832 intfdata = kzalloc(sizeof(*intfdata), GFP_KERNEL);
833 if (!intfdata)
834 return -ENOMEM;
835
836 spin_lock_init(&intfdata->susp_lock);
837
838 usb_set_serial_data(serial, intfdata);
839
840 /* Set Device mode to D0 */
841 sierra_set_power_state(serial->dev, 0x0000);
842
843 /* Check NMEA and set */
844 if (nmea)
845 sierra_vsc_set_nmea(serial->dev, 1);
846
847 return 0;
848}
849
850static void sierra_release(struct usb_serial *serial)
851{
852 struct sierra_intf_private *intfdata;
853
854 intfdata = usb_get_serial_data(serial);
855 kfree(intfdata);
856}
857
858static int sierra_port_probe(struct usb_serial_port *port)
859{
860 struct usb_serial *serial = port->serial;
861 struct sierra_port_private *portdata;
862 const struct sierra_iface_list *himemory_list;
863 u8 ifnum;
864
865 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
866 if (!portdata)
867 return -ENOMEM;
868
869 spin_lock_init(&portdata->lock);
870 init_usb_anchor(&portdata->active);
871 init_usb_anchor(&portdata->delayed);
872
873 /* Assume low memory requirements */
874 portdata->num_out_urbs = N_OUT_URB;
875 portdata->num_in_urbs = N_IN_URB;
876
877 /* Determine actual memory requirements */
878 if (serial->num_ports == 1) {
879 /* Get interface number for composite device */
880 ifnum = sierra_interface_num(serial);
881 himemory_list = &typeB_interface_list;
882 } else {
883 /* This is really the usb-serial port number of the interface
884 * rather than the interface number.
885 */
886 ifnum = port->port_number;
887 himemory_list = &typeA_interface_list;
888 }
889
890 if (is_listed(ifnum, himemory_list)) {
891 portdata->num_out_urbs = N_OUT_URB_HM;
892 portdata->num_in_urbs = N_IN_URB_HM;
893 }
894
895 dev_dbg(&port->dev,
896 "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
897 ifnum, portdata->num_in_urbs, portdata->num_out_urbs);
898
899 usb_set_serial_port_data(port, portdata);
900
901 return 0;
902}
903
904static void sierra_port_remove(struct usb_serial_port *port)
905{
906 struct sierra_port_private *portdata;
907
908 portdata = usb_get_serial_port_data(port);
909 usb_set_serial_port_data(port, NULL);
910 kfree(portdata);
911}
912
913#ifdef CONFIG_PM
914static void stop_read_write_urbs(struct usb_serial *serial)
915{
916 int i;
917 struct usb_serial_port *port;
918 struct sierra_port_private *portdata;
919
920 /* Stop reading/writing urbs */
921 for (i = 0; i < serial->num_ports; ++i) {
922 port = serial->port[i];
923 portdata = usb_get_serial_port_data(port);
924 if (!portdata)
925 continue;
926 sierra_stop_rx_urbs(port);
927 usb_kill_anchored_urbs(&portdata->active);
928 }
929}
930
931static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
932{
933 struct sierra_intf_private *intfdata = usb_get_serial_data(serial);
934
935 spin_lock_irq(&intfdata->susp_lock);
936 if (PMSG_IS_AUTO(message)) {
937 if (intfdata->in_flight) {
938 spin_unlock_irq(&intfdata->susp_lock);
939 return -EBUSY;
940 }
941 }
942 intfdata->suspended = 1;
943 spin_unlock_irq(&intfdata->susp_lock);
944
945 stop_read_write_urbs(serial);
946
947 return 0;
948}
949
950/* Caller must hold susp_lock. */
951static int sierra_submit_delayed_urbs(struct usb_serial_port *port)
952{
953 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
954 struct sierra_intf_private *intfdata;
955 struct urb *urb;
956 int ec = 0;
957 int err;
958
959 intfdata = usb_get_serial_data(port->serial);
960
961 for (;;) {
962 urb = usb_get_from_anchor(&portdata->delayed);
963 if (!urb)
964 break;
965
966 usb_anchor_urb(urb, &portdata->active);
967 intfdata->in_flight++;
968 err = usb_submit_urb(urb, GFP_ATOMIC);
969 if (err) {
970 dev_err(&port->dev, "%s - submit urb failed: %d",
971 __func__, err);
972 ec++;
973 intfdata->in_flight--;
974 usb_unanchor_urb(urb);
975 kfree(urb->transfer_buffer);
976 usb_free_urb(urb);
977
978 spin_lock(&portdata->lock);
979 portdata->outstanding_urbs--;
980 spin_unlock(&portdata->lock);
981 }
982 }
983
984 if (ec)
985 return -EIO;
986
987 return 0;
988}
989
990static int sierra_resume(struct usb_serial *serial)
991{
992 struct usb_serial_port *port;
993 struct sierra_intf_private *intfdata = usb_get_serial_data(serial);
994 int ec = 0;
995 int i, err;
996
997 spin_lock_irq(&intfdata->susp_lock);
998 for (i = 0; i < serial->num_ports; i++) {
999 port = serial->port[i];
1000
1001 if (!tty_port_initialized(&port->port))
1002 continue;
1003
1004 err = sierra_submit_delayed_urbs(port);
1005 if (err)
1006 ec++;
1007
1008 err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
1009 if (err)
1010 ec++;
1011 }
1012 intfdata->suspended = 0;
1013 spin_unlock_irq(&intfdata->susp_lock);
1014
1015 return ec ? -EIO : 0;
1016}
1017
1018#else
1019#define sierra_suspend NULL
1020#define sierra_resume NULL
1021#endif
1022
1023static struct usb_serial_driver sierra_device = {
1024 .driver = {
1025 .owner = THIS_MODULE,
1026 .name = "sierra",
1027 },
1028 .description = "Sierra USB modem",
1029 .id_table = id_table,
1030 .calc_num_ports = sierra_calc_num_ports,
1031 .probe = sierra_probe,
1032 .open = sierra_open,
1033 .close = sierra_close,
1034 .dtr_rts = sierra_dtr_rts,
1035 .write = sierra_write,
1036 .write_room = sierra_write_room,
1037 .chars_in_buffer = sierra_chars_in_buffer,
1038 .tiocmget = sierra_tiocmget,
1039 .tiocmset = sierra_tiocmset,
1040 .attach = sierra_startup,
1041 .release = sierra_release,
1042 .port_probe = sierra_port_probe,
1043 .port_remove = sierra_port_remove,
1044 .suspend = sierra_suspend,
1045 .resume = sierra_resume,
1046 .read_int_callback = sierra_instat_callback,
1047};
1048
1049static struct usb_serial_driver * const serial_drivers[] = {
1050 &sierra_device, NULL
1051};
1052
1053module_usb_serial_driver(serial_drivers, id_table);
1054
1055MODULE_AUTHOR(DRIVER_AUTHOR);
1056MODULE_DESCRIPTION(DRIVER_DESC);
1057MODULE_LICENSE("GPL v2");
1058
1059module_param(nmea, bool, S_IRUGO | S_IWUSR);
1060MODULE_PARM_DESC(nmea, "NMEA streaming");