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Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / drivers / usb / serial / sierra.c
blob5d5f5fdc9dcab02fe02d16b33af5ebba5ad301d0
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
49 static bool debug;
50 static bool nmea;
51
52 /* Used in interface blacklisting */
53 struct 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
58 struct sierra_intf_private {
59 spinlock_t susp_lock;
60 unsigned int suspended:1;
61 int in_flight;
62 };
63
64 static 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
79 static 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
94 static 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
114 static 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
131 static 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
148 static 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
169 static 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 */
211 static const u8 hi_memory_typeA_ifaces[] = { 0, 2 };
212 static const struct sierra_iface_info typeA_interface_list = {
213 .infolen = ARRAY_SIZE(hi_memory_typeA_ifaces),
214 .ifaceinfo = hi_memory_typeA_ifaces,
215 };
216
217 static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 };
218 static 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 */
224 static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11, 19, 20 };
225 static 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
230 static 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, 0x68A2), /* Sierra Wireless MC77xx in QMI mode */
302 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
303 },
304 { USB_DEVICE(0x1199, 0x68A3), /* Sierra Wireless Direct IP modems */
305 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
306 },
307 { USB_DEVICE(0x0f3d, 0x68A3), /* Airprime/Sierra Wireless Direct IP modems */
308 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
309 },
310 { USB_DEVICE(0x413C, 0x08133) }, /* Dell Computer Corp. Wireless 5720 VZW Mobile Broadband (EVDO Rev-A) Minicard GPS Port */
311
312 { }
313 };
314 MODULE_DEVICE_TABLE(usb, id_table);
315
316
317 struct sierra_port_private {
318 spinlock_t lock; /* lock the structure */
319 int outstanding_urbs; /* number of out urbs in flight */
320 struct usb_anchor active;
321 struct usb_anchor delayed;
322
323 int num_out_urbs;
324 int num_in_urbs;
325 /* Input endpoints and buffers for this port */
326 struct urb *in_urbs[N_IN_URB_HM];
327
328 /* Settings for the port */
329 int rts_state; /* Handshaking pins (outputs) */
330 int dtr_state;
331 int cts_state; /* Handshaking pins (inputs) */
332 int dsr_state;
333 int dcd_state;
334 int ri_state;
335 unsigned int opened:1;
336 };
337
338 static int sierra_send_setup(struct usb_serial_port *port)
339 {
340 struct usb_serial *serial = port->serial;
341 struct sierra_port_private *portdata;
342 __u16 interface = 0;
343 int val = 0;
344 int do_send = 0;
345 int retval;
346
347 dev_dbg(&port->dev, "%s\n", __func__);
348
349 portdata = usb_get_serial_port_data(port);
350
351 if (portdata->dtr_state)
352 val |= 0x01;
353 if (portdata->rts_state)
354 val |= 0x02;
355
356 /* If composite device then properly report interface */
357 if (serial->num_ports == 1) {
358 interface = sierra_calc_interface(serial);
359 /* Control message is sent only to interfaces with
360 * interrupt_in endpoints
361 */
362 if (port->interrupt_in_urb) {
363 /* send control message */
364 do_send = 1;
365 }
366 }
367
368 /* Otherwise the need to do non-composite mapping */
369 else {
370 if (port->bulk_out_endpointAddress == 2)
371 interface = 0;
372 else if (port->bulk_out_endpointAddress == 4)
373 interface = 1;
374 else if (port->bulk_out_endpointAddress == 5)
375 interface = 2;
376
377 do_send = 1;
378 }
379 if (!do_send)
380 return 0;
381
382 retval = usb_autopm_get_interface(serial->interface);
383 if (retval < 0)
384 return retval;
385
386 retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
387 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
388 usb_autopm_put_interface(serial->interface);
389
390 return retval;
391 }
392
393 static void sierra_set_termios(struct tty_struct *tty,
394 struct usb_serial_port *port, struct ktermios *old_termios)
395 {
396 dev_dbg(&port->dev, "%s\n", __func__);
397 tty_termios_copy_hw(tty->termios, old_termios);
398 sierra_send_setup(port);
399 }
400
401 static int sierra_tiocmget(struct tty_struct *tty)
402 {
403 struct usb_serial_port *port = tty->driver_data;
404 unsigned int value;
405 struct sierra_port_private *portdata;
406
407 dev_dbg(&port->dev, "%s\n", __func__);
408 portdata = usb_get_serial_port_data(port);
409
410 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
411 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
412 ((portdata->cts_state) ? TIOCM_CTS : 0) |
413 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
414 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
415 ((portdata->ri_state) ? TIOCM_RNG : 0);
416
417 return value;
418 }
419
420 static int sierra_tiocmset(struct tty_struct *tty,
421 unsigned int set, unsigned int clear)
422 {
423 struct usb_serial_port *port = tty->driver_data;
424 struct sierra_port_private *portdata;
425
426 portdata = usb_get_serial_port_data(port);
427
428 if (set & TIOCM_RTS)
429 portdata->rts_state = 1;
430 if (set & TIOCM_DTR)
431 portdata->dtr_state = 1;
432
433 if (clear & TIOCM_RTS)
434 portdata->rts_state = 0;
435 if (clear & TIOCM_DTR)
436 portdata->dtr_state = 0;
437 return sierra_send_setup(port);
438 }
439
440 static void sierra_release_urb(struct urb *urb)
441 {
442 struct usb_serial_port *port;
443 if (urb) {
444 port = urb->context;
445 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
446 kfree(urb->transfer_buffer);
447 usb_free_urb(urb);
448 }
449 }
450
451 static void sierra_outdat_callback(struct urb *urb)
452 {
453 struct usb_serial_port *port = urb->context;
454 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
455 struct sierra_intf_private *intfdata;
456 int status = urb->status;
457
458 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
459 intfdata = port->serial->private;
460
461 /* free up the transfer buffer, as usb_free_urb() does not do this */
462 kfree(urb->transfer_buffer);
463 usb_autopm_put_interface_async(port->serial->interface);
464 if (status)
465 dev_dbg(&port->dev, "%s - nonzero write bulk status "
466 "received: %d\n", __func__, status);
467
468 spin_lock(&portdata->lock);
469 --portdata->outstanding_urbs;
470 spin_unlock(&portdata->lock);
471 spin_lock(&intfdata->susp_lock);
472 --intfdata->in_flight;
473 spin_unlock(&intfdata->susp_lock);
474
475 usb_serial_port_softint(port);
476 }
477
478 /* Write */
479 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
480 const unsigned char *buf, int count)
481 {
482 struct sierra_port_private *portdata;
483 struct sierra_intf_private *intfdata;
484 struct usb_serial *serial = port->serial;
485 unsigned long flags;
486 unsigned char *buffer;
487 struct urb *urb;
488 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
489 int retval = 0;
490
491 /* verify that we actually have some data to write */
492 if (count == 0)
493 return 0;
494
495 portdata = usb_get_serial_port_data(port);
496 intfdata = serial->private;
497
498 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
499 spin_lock_irqsave(&portdata->lock, flags);
500 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
501 portdata->outstanding_urbs);
502 if (portdata->outstanding_urbs > portdata->num_out_urbs) {
503 spin_unlock_irqrestore(&portdata->lock, flags);
504 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
505 return 0;
506 }
507 portdata->outstanding_urbs++;
508 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
509 portdata->outstanding_urbs);
510 spin_unlock_irqrestore(&portdata->lock, flags);
511
512 retval = usb_autopm_get_interface_async(serial->interface);
513 if (retval < 0) {
514 spin_lock_irqsave(&portdata->lock, flags);
515 portdata->outstanding_urbs--;
516 spin_unlock_irqrestore(&portdata->lock, flags);
517 goto error_simple;
518 }
519
520 buffer = kmalloc(writesize, GFP_ATOMIC);
521 if (!buffer) {
522 dev_err(&port->dev, "out of memory\n");
523 retval = -ENOMEM;
524 goto error_no_buffer;
525 }
526
527 urb = usb_alloc_urb(0, GFP_ATOMIC);
528 if (!urb) {
529 dev_err(&port->dev, "no more free urbs\n");
530 retval = -ENOMEM;
531 goto error_no_urb;
532 }
533
534 memcpy(buffer, buf, writesize);
535
536 usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer);
537
538 usb_fill_bulk_urb(urb, serial->dev,
539 usb_sndbulkpipe(serial->dev,
540 port->bulk_out_endpointAddress),
541 buffer, writesize, sierra_outdat_callback, port);
542
543 /* Handle the need to send a zero length packet */
544 urb->transfer_flags |= URB_ZERO_PACKET;
545
546 spin_lock_irqsave(&intfdata->susp_lock, flags);
547
548 if (intfdata->suspended) {
549 usb_anchor_urb(urb, &portdata->delayed);
550 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
551 goto skip_power;
552 } else {
553 usb_anchor_urb(urb, &portdata->active);
554 }
555 /* send it down the pipe */
556 retval = usb_submit_urb(urb, GFP_ATOMIC);
557 if (retval) {
558 usb_unanchor_urb(urb);
559 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
560 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
561 "with status = %d\n", __func__, retval);
562 goto error;
563 } else {
564 intfdata->in_flight++;
565 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
566 }
567
568 skip_power:
569 /* we are done with this urb, so let the host driver
570 * really free it when it is finished with it */
571 usb_free_urb(urb);
572
573 return writesize;
574 error:
575 usb_free_urb(urb);
576 error_no_urb:
577 kfree(buffer);
578 error_no_buffer:
579 spin_lock_irqsave(&portdata->lock, flags);
580 --portdata->outstanding_urbs;
581 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
582 portdata->outstanding_urbs);
583 spin_unlock_irqrestore(&portdata->lock, flags);
584 usb_autopm_put_interface_async(serial->interface);
585 error_simple:
586 return retval;
587 }
588
589 static void sierra_indat_callback(struct urb *urb)
590 {
591 int err;
592 int endpoint;
593 struct usb_serial_port *port;
594 struct tty_struct *tty;
595 unsigned char *data = urb->transfer_buffer;
596 int status = urb->status;
597
598 endpoint = usb_pipeendpoint(urb->pipe);
599 port = urb->context;
600
601 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
602
603 if (status) {
604 dev_dbg(&port->dev, "%s: nonzero status: %d on"
605 " endpoint %02x\n", __func__, status, endpoint);
606 } else {
607 if (urb->actual_length) {
608 tty = tty_port_tty_get(&port->port);
609 if (tty) {
610 tty_insert_flip_string(tty, data,
611 urb->actual_length);
612 tty_flip_buffer_push(tty);
613
614 tty_kref_put(tty);
615 usb_serial_debug_data(debug, &port->dev,
616 __func__, urb->actual_length, data);
617 }
618 } else {
619 dev_dbg(&port->dev, "%s: empty read urb"
620 " received\n", __func__);
621 }
622 }
623
624 /* Resubmit urb so we continue receiving */
625 if (status != -ESHUTDOWN && status != -EPERM) {
626 usb_mark_last_busy(port->serial->dev);
627 err = usb_submit_urb(urb, GFP_ATOMIC);
628 if (err && err != -EPERM)
629 dev_err(&port->dev, "resubmit read urb failed."
630 "(%d)\n", err);
631 }
632 }
633
634 static void sierra_instat_callback(struct urb *urb)
635 {
636 int err;
637 int status = urb->status;
638 struct usb_serial_port *port = urb->context;
639 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
640 struct usb_serial *serial = port->serial;
641
642 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
643 urb, port, portdata);
644
645 if (status == 0) {
646 struct usb_ctrlrequest *req_pkt =
647 (struct usb_ctrlrequest *)urb->transfer_buffer;
648
649 if (!req_pkt) {
650 dev_dbg(&port->dev, "%s: NULL req_pkt\n",
651 __func__);
652 return;
653 }
654 if ((req_pkt->bRequestType == 0xA1) &&
655 (req_pkt->bRequest == 0x20)) {
656 int old_dcd_state;
657 unsigned char signals = *((unsigned char *)
658 urb->transfer_buffer +
659 sizeof(struct usb_ctrlrequest));
660 struct tty_struct *tty;
661
662 dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
663 signals);
664
665 old_dcd_state = portdata->dcd_state;
666 portdata->cts_state = 1;
667 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
668 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
669 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
670
671 tty = tty_port_tty_get(&port->port);
672 if (tty && !C_CLOCAL(tty) &&
673 old_dcd_state && !portdata->dcd_state)
674 tty_hangup(tty);
675 tty_kref_put(tty);
676 } else {
677 dev_dbg(&port->dev, "%s: type %x req %x\n",
678 __func__, req_pkt->bRequestType,
679 req_pkt->bRequest);
680 }
681 } else
682 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
683
684 /* Resubmit urb so we continue receiving IRQ data */
685 if (status != -ESHUTDOWN && status != -ENOENT) {
686 usb_mark_last_busy(serial->dev);
687 err = usb_submit_urb(urb, GFP_ATOMIC);
688 if (err && err != -EPERM)
689 dev_err(&port->dev, "%s: resubmit intr urb "
690 "failed. (%d)\n", __func__, err);
691 }
692 }
693
694 static int sierra_write_room(struct tty_struct *tty)
695 {
696 struct usb_serial_port *port = tty->driver_data;
697 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
698 unsigned long flags;
699
700 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
701
702 /* try to give a good number back based on if we have any free urbs at
703 * this point in time */
704 spin_lock_irqsave(&portdata->lock, flags);
705 if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) {
706 spin_unlock_irqrestore(&portdata->lock, flags);
707 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
708 return 0;
709 }
710 spin_unlock_irqrestore(&portdata->lock, flags);
711
712 return 2048;
713 }
714
715 static void sierra_stop_rx_urbs(struct usb_serial_port *port)
716 {
717 int i;
718 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
719
720 for (i = 0; i < portdata->num_in_urbs; i++)
721 usb_kill_urb(portdata->in_urbs[i]);
722
723 usb_kill_urb(port->interrupt_in_urb);
724 }
725
726 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
727 {
728 int ok_cnt;
729 int err = -EINVAL;
730 int i;
731 struct urb *urb;
732 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
733
734 ok_cnt = 0;
735 for (i = 0; i < portdata->num_in_urbs; i++) {
736 urb = portdata->in_urbs[i];
737 if (!urb)
738 continue;
739 err = usb_submit_urb(urb, mem_flags);
740 if (err) {
741 dev_err(&port->dev, "%s: submit urb failed: %d\n",
742 __func__, err);
743 } else {
744 ok_cnt++;
745 }
746 }
747
748 if (ok_cnt && port->interrupt_in_urb) {
749 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
750 if (err) {
751 dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
752 __func__, err);
753 }
754 }
755
756 if (ok_cnt > 0) /* at least one rx urb submitted */
757 return 0;
758 else
759 return err;
760 }
761
762 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
763 int dir, void *ctx, int len,
764 gfp_t mem_flags,
765 usb_complete_t callback)
766 {
767 struct urb *urb;
768 u8 *buf;
769
770 if (endpoint == -1)
771 return NULL;
772
773 urb = usb_alloc_urb(0, mem_flags);
774 if (urb == NULL) {
775 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n",
776 __func__, endpoint);
777 return NULL;
778 }
779
780 buf = kmalloc(len, mem_flags);
781 if (buf) {
782 /* Fill URB using supplied data */
783 usb_fill_bulk_urb(urb, serial->dev,
784 usb_sndbulkpipe(serial->dev, endpoint) | dir,
785 buf, len, callback, ctx);
786
787 /* debug */
788 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
789 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
790 } else {
791 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__,
792 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
793
794 sierra_release_urb(urb);
795 urb = NULL;
796 }
797
798 return urb;
799 }
800
801 static void sierra_close(struct usb_serial_port *port)
802 {
803 int i;
804 struct usb_serial *serial = port->serial;
805 struct sierra_port_private *portdata;
806 struct sierra_intf_private *intfdata = port->serial->private;
807
808
809 dev_dbg(&port->dev, "%s\n", __func__);
810 portdata = usb_get_serial_port_data(port);
811
812 portdata->rts_state = 0;
813 portdata->dtr_state = 0;
814
815 if (serial->dev) {
816 mutex_lock(&serial->disc_mutex);
817 if (!serial->disconnected) {
818 serial->interface->needs_remote_wakeup = 0;
819 /* odd error handling due to pm counters */
820 if (!usb_autopm_get_interface(serial->interface))
821 sierra_send_setup(port);
822 else
823 usb_autopm_get_interface_no_resume(serial->interface);
824
825 }
826 mutex_unlock(&serial->disc_mutex);
827 spin_lock_irq(&intfdata->susp_lock);
828 portdata->opened = 0;
829 spin_unlock_irq(&intfdata->susp_lock);
830
831
832 /* Stop reading urbs */
833 sierra_stop_rx_urbs(port);
834 /* .. and release them */
835 for (i = 0; i < portdata->num_in_urbs; i++) {
836 sierra_release_urb(portdata->in_urbs[i]);
837 portdata->in_urbs[i] = NULL;
838 }
839 }
840 }
841
842 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
843 {
844 struct sierra_port_private *portdata;
845 struct usb_serial *serial = port->serial;
846 struct sierra_intf_private *intfdata = serial->private;
847 int i;
848 int err;
849 int endpoint;
850 struct urb *urb;
851
852 portdata = usb_get_serial_port_data(port);
853
854 dev_dbg(&port->dev, "%s\n", __func__);
855
856 /* Set some sane defaults */
857 portdata->rts_state = 1;
858 portdata->dtr_state = 1;
859
860
861 endpoint = port->bulk_in_endpointAddress;
862 for (i = 0; i < portdata->num_in_urbs; i++) {
863 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
864 IN_BUFLEN, GFP_KERNEL,
865 sierra_indat_callback);
866 portdata->in_urbs[i] = urb;
867 }
868 /* clear halt condition */
869 usb_clear_halt(serial->dev,
870 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
871
872 err = sierra_submit_rx_urbs(port, GFP_KERNEL);
873 if (err) {
874 /* get rid of everything as in close */
875 sierra_close(port);
876 /* restore balance for autopm */
877 if (!serial->disconnected)
878 usb_autopm_put_interface(serial->interface);
879 return err;
880 }
881 sierra_send_setup(port);
882
883 serial->interface->needs_remote_wakeup = 1;
884 spin_lock_irq(&intfdata->susp_lock);
885 portdata->opened = 1;
886 spin_unlock_irq(&intfdata->susp_lock);
887 usb_autopm_put_interface(serial->interface);
888
889 return 0;
890 }
891
892
893 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
894 {
895 struct usb_serial *serial = port->serial;
896 struct sierra_port_private *portdata;
897
898 portdata = usb_get_serial_port_data(port);
899 portdata->rts_state = on;
900 portdata->dtr_state = on;
901
902 if (serial->dev) {
903 mutex_lock(&serial->disc_mutex);
904 if (!serial->disconnected)
905 sierra_send_setup(port);
906 mutex_unlock(&serial->disc_mutex);
907 }
908 }
909
910 static int sierra_startup(struct usb_serial *serial)
911 {
912 struct usb_serial_port *port;
913 struct sierra_port_private *portdata;
914 struct sierra_iface_info *himemoryp = NULL;
915 int i;
916 u8 ifnum;
917
918 dev_dbg(&serial->dev->dev, "%s\n", __func__);
919
920 /* Set Device mode to D0 */
921 sierra_set_power_state(serial->dev, 0x0000);
922
923 /* Check NMEA and set */
924 if (nmea)
925 sierra_vsc_set_nmea(serial->dev, 1);
926
927 /* Now setup per port private data */
928 for (i = 0; i < serial->num_ports; i++) {
929 port = serial->port[i];
930 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
931 if (!portdata) {
932 dev_dbg(&port->dev, "%s: kmalloc for "
933 "sierra_port_private (%d) failed!\n",
934 __func__, i);
935 return -ENOMEM;
936 }
937 spin_lock_init(&portdata->lock);
938 init_usb_anchor(&portdata->active);
939 init_usb_anchor(&portdata->delayed);
940 ifnum = i;
941 /* Assume low memory requirements */
942 portdata->num_out_urbs = N_OUT_URB;
943 portdata->num_in_urbs = N_IN_URB;
944
945 /* Determine actual memory requirements */
946 if (serial->num_ports == 1) {
947 /* Get interface number for composite device */
948 ifnum = sierra_calc_interface(serial);
949 himemoryp =
950 (struct sierra_iface_info *)&typeB_interface_list;
951 if (is_himemory(ifnum, himemoryp)) {
952 portdata->num_out_urbs = N_OUT_URB_HM;
953 portdata->num_in_urbs = N_IN_URB_HM;
954 }
955 }
956 else {
957 himemoryp =
958 (struct sierra_iface_info *)&typeA_interface_list;
959 if (is_himemory(i, himemoryp)) {
960 portdata->num_out_urbs = N_OUT_URB_HM;
961 portdata->num_in_urbs = N_IN_URB_HM;
962 }
963 }
964 dev_dbg(&serial->dev->dev,
965 "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
966 ifnum,portdata->num_in_urbs, portdata->num_out_urbs );
967 /* Set the port private data pointer */
968 usb_set_serial_port_data(port, portdata);
969 }
970
971 return 0;
972 }
973
974 static void sierra_release(struct usb_serial *serial)
975 {
976 int i;
977 struct usb_serial_port *port;
978 struct sierra_port_private *portdata;
979
980 dev_dbg(&serial->dev->dev, "%s\n", __func__);
981
982 for (i = 0; i < serial->num_ports; ++i) {
983 port = serial->port[i];
984 if (!port)
985 continue;
986 portdata = usb_get_serial_port_data(port);
987 if (!portdata)
988 continue;
989 kfree(portdata);
990 }
991 }
992
993 #ifdef CONFIG_PM
994 static void stop_read_write_urbs(struct usb_serial *serial)
995 {
996 int i;
997 struct usb_serial_port *port;
998 struct sierra_port_private *portdata;
999
1000 /* Stop reading/writing urbs */
1001 for (i = 0; i < serial->num_ports; ++i) {
1002 port = serial->port[i];
1003 portdata = usb_get_serial_port_data(port);
1004 sierra_stop_rx_urbs(port);
1005 usb_kill_anchored_urbs(&portdata->active);
1006 }
1007 }
1008
1009 static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
1010 {
1011 struct sierra_intf_private *intfdata;
1012 int b;
1013
1014 if (PMSG_IS_AUTO(message)) {
1015 intfdata = serial->private;
1016 spin_lock_irq(&intfdata->susp_lock);
1017 b = intfdata->in_flight;
1018
1019 if (b) {
1020 spin_unlock_irq(&intfdata->susp_lock);
1021 return -EBUSY;
1022 } else {
1023 intfdata->suspended = 1;
1024 spin_unlock_irq(&intfdata->susp_lock);
1025 }
1026 }
1027 stop_read_write_urbs(serial);
1028
1029 return 0;
1030 }
1031
1032 static int sierra_resume(struct usb_serial *serial)
1033 {
1034 struct usb_serial_port *port;
1035 struct sierra_intf_private *intfdata = serial->private;
1036 struct sierra_port_private *portdata;
1037 struct urb *urb;
1038 int ec = 0;
1039 int i, err;
1040
1041 spin_lock_irq(&intfdata->susp_lock);
1042 for (i = 0; i < serial->num_ports; i++) {
1043 port = serial->port[i];
1044 portdata = usb_get_serial_port_data(port);
1045
1046 while ((urb = usb_get_from_anchor(&portdata->delayed))) {
1047 usb_anchor_urb(urb, &portdata->active);
1048 intfdata->in_flight++;
1049 err = usb_submit_urb(urb, GFP_ATOMIC);
1050 if (err < 0) {
1051 intfdata->in_flight--;
1052 usb_unanchor_urb(urb);
1053 usb_scuttle_anchored_urbs(&portdata->delayed);
1054 break;
1055 }
1056 }
1057
1058 if (portdata->opened) {
1059 err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
1060 if (err)
1061 ec++;
1062 }
1063 }
1064 intfdata->suspended = 0;
1065 spin_unlock_irq(&intfdata->susp_lock);
1066
1067 return ec ? -EIO : 0;
1068 }
1069
1070 static int sierra_reset_resume(struct usb_interface *intf)
1071 {
1072 struct usb_serial *serial = usb_get_intfdata(intf);
1073 dev_err(&serial->dev->dev, "%s\n", __func__);
1074 return usb_serial_resume(intf);
1075 }
1076 #else
1077 #define sierra_suspend NULL
1078 #define sierra_resume NULL
1079 #define sierra_reset_resume NULL
1080 #endif
1081
1082 static struct usb_driver sierra_driver = {
1083 .name = "sierra",
1084 .probe = usb_serial_probe,
1085 .disconnect = usb_serial_disconnect,
1086 .suspend = usb_serial_suspend,
1087 .resume = usb_serial_resume,
1088 .reset_resume = sierra_reset_resume,
1089 .id_table = id_table,
1090 .no_dynamic_id = 1,
1091 .supports_autosuspend = 1,
1092 };
1093
1094 static struct usb_serial_driver sierra_device = {
1095 .driver = {
1096 .owner = THIS_MODULE,
1097 .name = "sierra",
1098 },
1099 .description = "Sierra USB modem",
1100 .id_table = id_table,
1101 .usb_driver = &sierra_driver,
1102 .calc_num_ports = sierra_calc_num_ports,
1103 .probe = sierra_probe,
1104 .open = sierra_open,
1105 .close = sierra_close,
1106 .dtr_rts = sierra_dtr_rts,
1107 .write = sierra_write,
1108 .write_room = sierra_write_room,
1109 .set_termios = sierra_set_termios,
1110 .tiocmget = sierra_tiocmget,
1111 .tiocmset = sierra_tiocmset,
1112 .attach = sierra_startup,
1113 .release = sierra_release,
1114 .suspend = sierra_suspend,
1115 .resume = sierra_resume,
1116 .read_int_callback = sierra_instat_callback,
1117 };
1118
1119 /* Functions used by new usb-serial code. */
1120 static int __init sierra_init(void)
1121 {
1122 int retval;
1123 retval = usb_serial_register(&sierra_device);
1124 if (retval)
1125 goto failed_device_register;
1126
1127
1128 retval = usb_register(&sierra_driver);
1129 if (retval)
1130 goto failed_driver_register;
1131
1132 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1133 DRIVER_DESC "\n");
1134
1135 return 0;
1136
1137 failed_driver_register:
1138 usb_serial_deregister(&sierra_device);
1139 failed_device_register:
1140 return retval;
1141 }
1142
1143 static void __exit sierra_exit(void)
1144 {
1145 usb_deregister(&sierra_driver);
1146 usb_serial_deregister(&sierra_device);
1147 }
1148
1149 module_init(sierra_init);
1150 module_exit(sierra_exit);
1151
1152 MODULE_AUTHOR(DRIVER_AUTHOR);
1153 MODULE_DESCRIPTION(DRIVER_DESC);
1154 MODULE_VERSION(DRIVER_VERSION);
1155 MODULE_LICENSE("GPL");
1156
1157 module_param(nmea, bool, S_IRUGO | S_IWUSR);
1158 MODULE_PARM_DESC(nmea, "NMEA streaming");
1159
1160 module_param(debug, bool, S_IRUGO | S_IWUSR);
1161 MODULE_PARM_DESC(debug, "Debug messages");