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Merge tag 'firewire-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394...
[deliverable/linux.git] / drivers / usb / serial / sierra.c
1 /*
2 USB Driver for Sierra Wireless
3
4 Copyright (C) 2006, 2007, 2008 Kevin Lloyd <klloyd@sierrawireless.com>,
5
6 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 nmea;
50
51 /* Used in interface blacklisting */
52 struct sierra_iface_info {
53 const u32 infolen; /* number of interface numbers on blacklist */
54 const u8 *ifaceinfo; /* pointer to the array holding the numbers */
55 };
56
57 struct sierra_intf_private {
58 spinlock_t susp_lock;
59 unsigned int suspended:1;
60 int in_flight;
61 };
62
63 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
64 {
65 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
66 SWIMS_USB_REQUEST_SetPower, /* __u8 request */
67 USB_TYPE_VENDOR, /* __u8 request type */
68 swiState, /* __u16 value */
69 0, /* __u16 index */
70 NULL, /* void *data */
71 0, /* __u16 size */
72 USB_CTRL_SET_TIMEOUT); /* int timeout */
73 }
74
75 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
76 {
77 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
78 SWIMS_USB_REQUEST_SetNmea, /* __u8 request */
79 USB_TYPE_VENDOR, /* __u8 request type */
80 enable, /* __u16 value */
81 0x0000, /* __u16 index */
82 NULL, /* void *data */
83 0, /* __u16 size */
84 USB_CTRL_SET_TIMEOUT); /* int timeout */
85 }
86
87 static int sierra_calc_num_ports(struct usb_serial *serial)
88 {
89 int num_ports = 0;
90 u8 ifnum, numendpoints;
91
92 ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
93 numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
94
95 /* Dummy interface present on some SKUs should be ignored */
96 if (ifnum == 0x99)
97 num_ports = 0;
98 else if (numendpoints <= 3)
99 num_ports = 1;
100 else
101 num_ports = (numendpoints-1)/2;
102 return num_ports;
103 }
104
105 static int is_blacklisted(const u8 ifnum,
106 const struct sierra_iface_info *blacklist)
107 {
108 const u8 *info;
109 int i;
110
111 if (blacklist) {
112 info = blacklist->ifaceinfo;
113
114 for (i = 0; i < blacklist->infolen; i++) {
115 if (info[i] == ifnum)
116 return 1;
117 }
118 }
119 return 0;
120 }
121
122 static int is_himemory(const u8 ifnum,
123 const struct sierra_iface_info *himemorylist)
124 {
125 const u8 *info;
126 int i;
127
128 if (himemorylist) {
129 info = himemorylist->ifaceinfo;
130
131 for (i=0; i < himemorylist->infolen; i++) {
132 if (info[i] == ifnum)
133 return 1;
134 }
135 }
136 return 0;
137 }
138
139 static int sierra_calc_interface(struct usb_serial *serial)
140 {
141 int interface;
142 struct usb_interface *p_interface;
143 struct usb_host_interface *p_host_interface;
144
145 /* Get the interface structure pointer from the serial struct */
146 p_interface = serial->interface;
147
148 /* Get a pointer to the host interface structure */
149 p_host_interface = p_interface->cur_altsetting;
150
151 /* read the interface descriptor for this active altsetting
152 * to find out the interface number we are on
153 */
154 interface = p_host_interface->desc.bInterfaceNumber;
155
156 return interface;
157 }
158
159 static int sierra_probe(struct usb_serial *serial,
160 const struct usb_device_id *id)
161 {
162 int result = 0;
163 struct usb_device *udev;
164 struct sierra_intf_private *data;
165 u8 ifnum;
166
167 udev = serial->dev;
168 ifnum = sierra_calc_interface(serial);
169
170 /*
171 * If this interface supports more than 1 alternate
172 * select the 2nd one
173 */
174 if (serial->interface->num_altsetting == 2) {
175 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
176 ifnum);
177 /* We know the alternate setting is 1 for the MC8785 */
178 usb_set_interface(udev, ifnum, 1);
179 }
180
181 /* ifnum could have changed - by calling usb_set_interface */
182 ifnum = sierra_calc_interface(serial);
183
184 if (is_blacklisted(ifnum,
185 (struct sierra_iface_info *)id->driver_info)) {
186 dev_dbg(&serial->dev->dev,
187 "Ignoring blacklisted interface #%d\n", ifnum);
188 return -ENODEV;
189 }
190
191 data = serial->private = kzalloc(sizeof(struct sierra_intf_private), GFP_KERNEL);
192 if (!data)
193 return -ENOMEM;
194 spin_lock_init(&data->susp_lock);
195
196 return result;
197 }
198
199 /* interfaces with higher memory requirements */
200 static const u8 hi_memory_typeA_ifaces[] = { 0, 2 };
201 static const struct sierra_iface_info typeA_interface_list = {
202 .infolen = ARRAY_SIZE(hi_memory_typeA_ifaces),
203 .ifaceinfo = hi_memory_typeA_ifaces,
204 };
205
206 static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 };
207 static const struct sierra_iface_info typeB_interface_list = {
208 .infolen = ARRAY_SIZE(hi_memory_typeB_ifaces),
209 .ifaceinfo = hi_memory_typeB_ifaces,
210 };
211
212 /* 'blacklist' of interfaces not served by this driver */
213 static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11, 19, 20 };
214 static const struct sierra_iface_info direct_ip_interface_blacklist = {
215 .infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces),
216 .ifaceinfo = direct_ip_non_serial_ifaces,
217 };
218
219 static const struct usb_device_id id_table[] = {
220 { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
221 { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */
222 { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */
223 { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */
224
225 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
226 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
227 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
228 { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
229 { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
230 { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */
231 { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
232 { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */
233 { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
234 { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
235 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
236 { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
237 { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U */
238 /* Sierra Wireless C597 */
239 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
240 /* Sierra Wireless T598 */
241 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
242 { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */
243 { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */
244 { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */
245 { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */
246
247 { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
248 { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
249 { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
250 { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */
251 { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */
252 { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */
253 { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
254 { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */
255 { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
256 { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */
257 { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
258 { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
259 { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */
260 { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
261 { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
262 { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */
263 { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */
264 { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */
265 { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */
266 { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
267 { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
268 /* Sierra Wireless MC8790, MC8791, MC8792 Composite */
269 { USB_DEVICE(0x1199, 0x683C) },
270 { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
271 /* Sierra Wireless MC8790, MC8791, MC8792 */
272 { USB_DEVICE(0x1199, 0x683E) },
273 { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
274 { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
275 { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
276 { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
277 { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
278 { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
279 { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
280 { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
281 /* Sierra Wireless C885 */
282 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
283 /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */
284 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
285 /* Sierra Wireless C22/C33 */
286 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
287 /* Sierra Wireless HSPA Non-Composite Device */
288 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
289 { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */
290 { USB_DEVICE(0x1199, 0x68A3), /* Sierra Wireless Direct IP modems */
291 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
292 },
293 /* AT&T Direct IP LTE modems */
294 { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68AA, 0xFF, 0xFF, 0xFF),
295 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
296 },
297 { USB_DEVICE(0x0f3d, 0x68A3), /* Airprime/Sierra Wireless Direct IP modems */
298 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
299 },
300 { USB_DEVICE(0x413C, 0x08133) }, /* Dell Computer Corp. Wireless 5720 VZW Mobile Broadband (EVDO Rev-A) Minicard GPS Port */
301
302 { }
303 };
304 MODULE_DEVICE_TABLE(usb, id_table);
305
306
307 struct sierra_port_private {
308 spinlock_t lock; /* lock the structure */
309 int outstanding_urbs; /* number of out urbs in flight */
310 struct usb_anchor active;
311 struct usb_anchor delayed;
312
313 int num_out_urbs;
314 int num_in_urbs;
315 /* Input endpoints and buffers for this port */
316 struct urb *in_urbs[N_IN_URB_HM];
317
318 /* Settings for the port */
319 int rts_state; /* Handshaking pins (outputs) */
320 int dtr_state;
321 int cts_state; /* Handshaking pins (inputs) */
322 int dsr_state;
323 int dcd_state;
324 int ri_state;
325 unsigned int opened:1;
326 };
327
328 static int sierra_send_setup(struct usb_serial_port *port)
329 {
330 struct usb_serial *serial = port->serial;
331 struct sierra_port_private *portdata;
332 __u16 interface = 0;
333 int val = 0;
334 int do_send = 0;
335 int retval;
336
337 portdata = usb_get_serial_port_data(port);
338
339 if (portdata->dtr_state)
340 val |= 0x01;
341 if (portdata->rts_state)
342 val |= 0x02;
343
344 /* If composite device then properly report interface */
345 if (serial->num_ports == 1) {
346 interface = sierra_calc_interface(serial);
347 /* Control message is sent only to interfaces with
348 * interrupt_in endpoints
349 */
350 if (port->interrupt_in_urb) {
351 /* send control message */
352 do_send = 1;
353 }
354 }
355
356 /* Otherwise the need to do non-composite mapping */
357 else {
358 if (port->bulk_out_endpointAddress == 2)
359 interface = 0;
360 else if (port->bulk_out_endpointAddress == 4)
361 interface = 1;
362 else if (port->bulk_out_endpointAddress == 5)
363 interface = 2;
364
365 do_send = 1;
366 }
367 if (!do_send)
368 return 0;
369
370 retval = usb_autopm_get_interface(serial->interface);
371 if (retval < 0)
372 return retval;
373
374 retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
375 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
376 usb_autopm_put_interface(serial->interface);
377
378 return retval;
379 }
380
381 static void sierra_set_termios(struct tty_struct *tty,
382 struct usb_serial_port *port, struct ktermios *old_termios)
383 {
384 tty_termios_copy_hw(&tty->termios, old_termios);
385 sierra_send_setup(port);
386 }
387
388 static int sierra_tiocmget(struct tty_struct *tty)
389 {
390 struct usb_serial_port *port = tty->driver_data;
391 unsigned int value;
392 struct sierra_port_private *portdata;
393
394 portdata = usb_get_serial_port_data(port);
395
396 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
397 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
398 ((portdata->cts_state) ? TIOCM_CTS : 0) |
399 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
400 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
401 ((portdata->ri_state) ? TIOCM_RNG : 0);
402
403 return value;
404 }
405
406 static int sierra_tiocmset(struct tty_struct *tty,
407 unsigned int set, unsigned int clear)
408 {
409 struct usb_serial_port *port = tty->driver_data;
410 struct sierra_port_private *portdata;
411
412 portdata = usb_get_serial_port_data(port);
413
414 if (set & TIOCM_RTS)
415 portdata->rts_state = 1;
416 if (set & TIOCM_DTR)
417 portdata->dtr_state = 1;
418
419 if (clear & TIOCM_RTS)
420 portdata->rts_state = 0;
421 if (clear & TIOCM_DTR)
422 portdata->dtr_state = 0;
423 return sierra_send_setup(port);
424 }
425
426 static void sierra_release_urb(struct urb *urb)
427 {
428 struct usb_serial_port *port;
429 if (urb) {
430 port = urb->context;
431 kfree(urb->transfer_buffer);
432 usb_free_urb(urb);
433 }
434 }
435
436 static void sierra_outdat_callback(struct urb *urb)
437 {
438 struct usb_serial_port *port = urb->context;
439 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
440 struct sierra_intf_private *intfdata;
441 int status = urb->status;
442
443 intfdata = port->serial->private;
444
445 /* free up the transfer buffer, as usb_free_urb() does not do this */
446 kfree(urb->transfer_buffer);
447 usb_autopm_put_interface_async(port->serial->interface);
448 if (status)
449 dev_dbg(&port->dev, "%s - nonzero write bulk status "
450 "received: %d\n", __func__, status);
451
452 spin_lock(&portdata->lock);
453 --portdata->outstanding_urbs;
454 spin_unlock(&portdata->lock);
455 spin_lock(&intfdata->susp_lock);
456 --intfdata->in_flight;
457 spin_unlock(&intfdata->susp_lock);
458
459 usb_serial_port_softint(port);
460 }
461
462 /* Write */
463 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
464 const unsigned char *buf, int count)
465 {
466 struct sierra_port_private *portdata;
467 struct sierra_intf_private *intfdata;
468 struct usb_serial *serial = port->serial;
469 unsigned long flags;
470 unsigned char *buffer;
471 struct urb *urb;
472 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
473 int retval = 0;
474
475 /* verify that we actually have some data to write */
476 if (count == 0)
477 return 0;
478
479 portdata = usb_get_serial_port_data(port);
480 intfdata = serial->private;
481
482 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
483 spin_lock_irqsave(&portdata->lock, flags);
484 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
485 portdata->outstanding_urbs);
486 if (portdata->outstanding_urbs > portdata->num_out_urbs) {
487 spin_unlock_irqrestore(&portdata->lock, flags);
488 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
489 return 0;
490 }
491 portdata->outstanding_urbs++;
492 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
493 portdata->outstanding_urbs);
494 spin_unlock_irqrestore(&portdata->lock, flags);
495
496 retval = usb_autopm_get_interface_async(serial->interface);
497 if (retval < 0) {
498 spin_lock_irqsave(&portdata->lock, flags);
499 portdata->outstanding_urbs--;
500 spin_unlock_irqrestore(&portdata->lock, flags);
501 goto error_simple;
502 }
503
504 buffer = kmalloc(writesize, GFP_ATOMIC);
505 if (!buffer) {
506 dev_err(&port->dev, "out of memory\n");
507 retval = -ENOMEM;
508 goto error_no_buffer;
509 }
510
511 urb = usb_alloc_urb(0, GFP_ATOMIC);
512 if (!urb) {
513 dev_err(&port->dev, "no more free urbs\n");
514 retval = -ENOMEM;
515 goto error_no_urb;
516 }
517
518 memcpy(buffer, buf, writesize);
519
520 usb_serial_debug_data(&port->dev, __func__, writesize, buffer);
521
522 usb_fill_bulk_urb(urb, serial->dev,
523 usb_sndbulkpipe(serial->dev,
524 port->bulk_out_endpointAddress),
525 buffer, writesize, sierra_outdat_callback, port);
526
527 /* Handle the need to send a zero length packet */
528 urb->transfer_flags |= URB_ZERO_PACKET;
529
530 spin_lock_irqsave(&intfdata->susp_lock, flags);
531
532 if (intfdata->suspended) {
533 usb_anchor_urb(urb, &portdata->delayed);
534 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
535 goto skip_power;
536 } else {
537 usb_anchor_urb(urb, &portdata->active);
538 }
539 /* send it down the pipe */
540 retval = usb_submit_urb(urb, GFP_ATOMIC);
541 if (retval) {
542 usb_unanchor_urb(urb);
543 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
544 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
545 "with status = %d\n", __func__, retval);
546 goto error;
547 } else {
548 intfdata->in_flight++;
549 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
550 }
551
552 skip_power:
553 /* we are done with this urb, so let the host driver
554 * really free it when it is finished with it */
555 usb_free_urb(urb);
556
557 return writesize;
558 error:
559 usb_free_urb(urb);
560 error_no_urb:
561 kfree(buffer);
562 error_no_buffer:
563 spin_lock_irqsave(&portdata->lock, flags);
564 --portdata->outstanding_urbs;
565 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
566 portdata->outstanding_urbs);
567 spin_unlock_irqrestore(&portdata->lock, flags);
568 usb_autopm_put_interface_async(serial->interface);
569 error_simple:
570 return retval;
571 }
572
573 static void sierra_indat_callback(struct urb *urb)
574 {
575 int err;
576 int endpoint;
577 struct usb_serial_port *port;
578 struct tty_struct *tty;
579 unsigned char *data = urb->transfer_buffer;
580 int status = urb->status;
581
582 endpoint = usb_pipeendpoint(urb->pipe);
583 port = urb->context;
584
585 if (status) {
586 dev_dbg(&port->dev, "%s: nonzero status: %d on"
587 " endpoint %02x\n", __func__, status, endpoint);
588 } else {
589 if (urb->actual_length) {
590 tty = tty_port_tty_get(&port->port);
591 if (tty) {
592 tty_insert_flip_string(tty, data,
593 urb->actual_length);
594 tty_flip_buffer_push(tty);
595
596 tty_kref_put(tty);
597 usb_serial_debug_data(&port->dev, __func__,
598 urb->actual_length, data);
599 }
600 } else {
601 dev_dbg(&port->dev, "%s: empty read urb"
602 " received\n", __func__);
603 }
604 }
605
606 /* Resubmit urb so we continue receiving */
607 if (status != -ESHUTDOWN && status != -EPERM) {
608 usb_mark_last_busy(port->serial->dev);
609 err = usb_submit_urb(urb, GFP_ATOMIC);
610 if (err && err != -EPERM)
611 dev_err(&port->dev, "resubmit read urb failed."
612 "(%d)\n", err);
613 }
614 }
615
616 static void sierra_instat_callback(struct urb *urb)
617 {
618 int err;
619 int status = urb->status;
620 struct usb_serial_port *port = urb->context;
621 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
622 struct usb_serial *serial = port->serial;
623
624 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
625 urb, port, portdata);
626
627 if (status == 0) {
628 struct usb_ctrlrequest *req_pkt =
629 (struct usb_ctrlrequest *)urb->transfer_buffer;
630
631 if (!req_pkt) {
632 dev_dbg(&port->dev, "%s: NULL req_pkt\n",
633 __func__);
634 return;
635 }
636 if ((req_pkt->bRequestType == 0xA1) &&
637 (req_pkt->bRequest == 0x20)) {
638 int old_dcd_state;
639 unsigned char signals = *((unsigned char *)
640 urb->transfer_buffer +
641 sizeof(struct usb_ctrlrequest));
642 struct tty_struct *tty;
643
644 dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
645 signals);
646
647 old_dcd_state = portdata->dcd_state;
648 portdata->cts_state = 1;
649 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
650 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
651 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
652
653 tty = tty_port_tty_get(&port->port);
654 if (tty && !C_CLOCAL(tty) &&
655 old_dcd_state && !portdata->dcd_state)
656 tty_hangup(tty);
657 tty_kref_put(tty);
658 } else {
659 dev_dbg(&port->dev, "%s: type %x req %x\n",
660 __func__, req_pkt->bRequestType,
661 req_pkt->bRequest);
662 }
663 } else
664 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
665
666 /* Resubmit urb so we continue receiving IRQ data */
667 if (status != -ESHUTDOWN && status != -ENOENT) {
668 usb_mark_last_busy(serial->dev);
669 err = usb_submit_urb(urb, GFP_ATOMIC);
670 if (err && err != -EPERM)
671 dev_err(&port->dev, "%s: resubmit intr urb "
672 "failed. (%d)\n", __func__, err);
673 }
674 }
675
676 static int sierra_write_room(struct tty_struct *tty)
677 {
678 struct usb_serial_port *port = tty->driver_data;
679 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
680 unsigned long flags;
681
682 /* try to give a good number back based on if we have any free urbs at
683 * this point in time */
684 spin_lock_irqsave(&portdata->lock, flags);
685 if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) {
686 spin_unlock_irqrestore(&portdata->lock, flags);
687 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
688 return 0;
689 }
690 spin_unlock_irqrestore(&portdata->lock, flags);
691
692 return 2048;
693 }
694
695 static void sierra_stop_rx_urbs(struct usb_serial_port *port)
696 {
697 int i;
698 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
699
700 for (i = 0; i < portdata->num_in_urbs; i++)
701 usb_kill_urb(portdata->in_urbs[i]);
702
703 usb_kill_urb(port->interrupt_in_urb);
704 }
705
706 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
707 {
708 int ok_cnt;
709 int err = -EINVAL;
710 int i;
711 struct urb *urb;
712 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
713
714 ok_cnt = 0;
715 for (i = 0; i < portdata->num_in_urbs; i++) {
716 urb = portdata->in_urbs[i];
717 if (!urb)
718 continue;
719 err = usb_submit_urb(urb, mem_flags);
720 if (err) {
721 dev_err(&port->dev, "%s: submit urb failed: %d\n",
722 __func__, err);
723 } else {
724 ok_cnt++;
725 }
726 }
727
728 if (ok_cnt && port->interrupt_in_urb) {
729 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
730 if (err) {
731 dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
732 __func__, err);
733 }
734 }
735
736 if (ok_cnt > 0) /* at least one rx urb submitted */
737 return 0;
738 else
739 return err;
740 }
741
742 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
743 int dir, void *ctx, int len,
744 gfp_t mem_flags,
745 usb_complete_t callback)
746 {
747 struct urb *urb;
748 u8 *buf;
749
750 if (endpoint == -1)
751 return NULL;
752
753 urb = usb_alloc_urb(0, mem_flags);
754 if (urb == NULL) {
755 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n",
756 __func__, endpoint);
757 return NULL;
758 }
759
760 buf = kmalloc(len, mem_flags);
761 if (buf) {
762 /* Fill URB using supplied data */
763 usb_fill_bulk_urb(urb, serial->dev,
764 usb_sndbulkpipe(serial->dev, endpoint) | dir,
765 buf, len, callback, ctx);
766
767 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
768 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
769 } else {
770 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__,
771 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
772
773 sierra_release_urb(urb);
774 urb = NULL;
775 }
776
777 return urb;
778 }
779
780 static void sierra_close(struct usb_serial_port *port)
781 {
782 int i;
783 struct usb_serial *serial = port->serial;
784 struct sierra_port_private *portdata;
785 struct sierra_intf_private *intfdata = port->serial->private;
786
787 portdata = usb_get_serial_port_data(port);
788
789 portdata->rts_state = 0;
790 portdata->dtr_state = 0;
791
792 if (serial->dev) {
793 mutex_lock(&serial->disc_mutex);
794 if (!serial->disconnected) {
795 serial->interface->needs_remote_wakeup = 0;
796 /* odd error handling due to pm counters */
797 if (!usb_autopm_get_interface(serial->interface))
798 sierra_send_setup(port);
799 else
800 usb_autopm_get_interface_no_resume(serial->interface);
801
802 }
803 mutex_unlock(&serial->disc_mutex);
804 spin_lock_irq(&intfdata->susp_lock);
805 portdata->opened = 0;
806 spin_unlock_irq(&intfdata->susp_lock);
807
808
809 /* Stop reading urbs */
810 sierra_stop_rx_urbs(port);
811 /* .. and release them */
812 for (i = 0; i < portdata->num_in_urbs; i++) {
813 sierra_release_urb(portdata->in_urbs[i]);
814 portdata->in_urbs[i] = NULL;
815 }
816 }
817 }
818
819 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
820 {
821 struct sierra_port_private *portdata;
822 struct usb_serial *serial = port->serial;
823 struct sierra_intf_private *intfdata = serial->private;
824 int i;
825 int err;
826 int endpoint;
827 struct urb *urb;
828
829 portdata = usb_get_serial_port_data(port);
830
831 /* Set some sane defaults */
832 portdata->rts_state = 1;
833 portdata->dtr_state = 1;
834
835
836 endpoint = port->bulk_in_endpointAddress;
837 for (i = 0; i < portdata->num_in_urbs; i++) {
838 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
839 IN_BUFLEN, GFP_KERNEL,
840 sierra_indat_callback);
841 portdata->in_urbs[i] = urb;
842 }
843 /* clear halt condition */
844 usb_clear_halt(serial->dev,
845 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
846
847 err = sierra_submit_rx_urbs(port, GFP_KERNEL);
848 if (err) {
849 /* get rid of everything as in close */
850 sierra_close(port);
851 /* restore balance for autopm */
852 if (!serial->disconnected)
853 usb_autopm_put_interface(serial->interface);
854 return err;
855 }
856 sierra_send_setup(port);
857
858 serial->interface->needs_remote_wakeup = 1;
859 spin_lock_irq(&intfdata->susp_lock);
860 portdata->opened = 1;
861 spin_unlock_irq(&intfdata->susp_lock);
862 usb_autopm_put_interface(serial->interface);
863
864 return 0;
865 }
866
867
868 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
869 {
870 struct usb_serial *serial = port->serial;
871 struct sierra_port_private *portdata;
872
873 portdata = usb_get_serial_port_data(port);
874 portdata->rts_state = on;
875 portdata->dtr_state = on;
876
877 if (serial->dev) {
878 mutex_lock(&serial->disc_mutex);
879 if (!serial->disconnected)
880 sierra_send_setup(port);
881 mutex_unlock(&serial->disc_mutex);
882 }
883 }
884
885 static int sierra_startup(struct usb_serial *serial)
886 {
887 struct usb_serial_port *port;
888 struct sierra_port_private *portdata;
889 struct sierra_iface_info *himemoryp = NULL;
890 int i;
891 u8 ifnum;
892
893 /* Set Device mode to D0 */
894 sierra_set_power_state(serial->dev, 0x0000);
895
896 /* Check NMEA and set */
897 if (nmea)
898 sierra_vsc_set_nmea(serial->dev, 1);
899
900 /* Now setup per port private data */
901 for (i = 0; i < serial->num_ports; i++) {
902 port = serial->port[i];
903 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
904 if (!portdata) {
905 dev_dbg(&port->dev, "%s: kmalloc for "
906 "sierra_port_private (%d) failed!\n",
907 __func__, i);
908 return -ENOMEM;
909 }
910 spin_lock_init(&portdata->lock);
911 init_usb_anchor(&portdata->active);
912 init_usb_anchor(&portdata->delayed);
913 ifnum = i;
914 /* Assume low memory requirements */
915 portdata->num_out_urbs = N_OUT_URB;
916 portdata->num_in_urbs = N_IN_URB;
917
918 /* Determine actual memory requirements */
919 if (serial->num_ports == 1) {
920 /* Get interface number for composite device */
921 ifnum = sierra_calc_interface(serial);
922 himemoryp =
923 (struct sierra_iface_info *)&typeB_interface_list;
924 if (is_himemory(ifnum, himemoryp)) {
925 portdata->num_out_urbs = N_OUT_URB_HM;
926 portdata->num_in_urbs = N_IN_URB_HM;
927 }
928 }
929 else {
930 himemoryp =
931 (struct sierra_iface_info *)&typeA_interface_list;
932 if (is_himemory(i, himemoryp)) {
933 portdata->num_out_urbs = N_OUT_URB_HM;
934 portdata->num_in_urbs = N_IN_URB_HM;
935 }
936 }
937 dev_dbg(&serial->dev->dev,
938 "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
939 ifnum,portdata->num_in_urbs, portdata->num_out_urbs );
940 /* Set the port private data pointer */
941 usb_set_serial_port_data(port, portdata);
942 }
943
944 return 0;
945 }
946
947 static void sierra_release(struct usb_serial *serial)
948 {
949 int i;
950 struct usb_serial_port *port;
951 struct sierra_port_private *portdata;
952
953 for (i = 0; i < serial->num_ports; ++i) {
954 port = serial->port[i];
955 if (!port)
956 continue;
957 portdata = usb_get_serial_port_data(port);
958 if (!portdata)
959 continue;
960 kfree(portdata);
961 }
962 }
963
964 #ifdef CONFIG_PM
965 static void stop_read_write_urbs(struct usb_serial *serial)
966 {
967 int i;
968 struct usb_serial_port *port;
969 struct sierra_port_private *portdata;
970
971 /* Stop reading/writing urbs */
972 for (i = 0; i < serial->num_ports; ++i) {
973 port = serial->port[i];
974 portdata = usb_get_serial_port_data(port);
975 sierra_stop_rx_urbs(port);
976 usb_kill_anchored_urbs(&portdata->active);
977 }
978 }
979
980 static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
981 {
982 struct sierra_intf_private *intfdata;
983 int b;
984
985 if (PMSG_IS_AUTO(message)) {
986 intfdata = serial->private;
987 spin_lock_irq(&intfdata->susp_lock);
988 b = intfdata->in_flight;
989
990 if (b) {
991 spin_unlock_irq(&intfdata->susp_lock);
992 return -EBUSY;
993 } else {
994 intfdata->suspended = 1;
995 spin_unlock_irq(&intfdata->susp_lock);
996 }
997 }
998 stop_read_write_urbs(serial);
999
1000 return 0;
1001 }
1002
1003 static int sierra_resume(struct usb_serial *serial)
1004 {
1005 struct usb_serial_port *port;
1006 struct sierra_intf_private *intfdata = serial->private;
1007 struct sierra_port_private *portdata;
1008 struct urb *urb;
1009 int ec = 0;
1010 int i, err;
1011
1012 spin_lock_irq(&intfdata->susp_lock);
1013 for (i = 0; i < serial->num_ports; i++) {
1014 port = serial->port[i];
1015 portdata = usb_get_serial_port_data(port);
1016
1017 while ((urb = usb_get_from_anchor(&portdata->delayed))) {
1018 usb_anchor_urb(urb, &portdata->active);
1019 intfdata->in_flight++;
1020 err = usb_submit_urb(urb, GFP_ATOMIC);
1021 if (err < 0) {
1022 intfdata->in_flight--;
1023 usb_unanchor_urb(urb);
1024 usb_scuttle_anchored_urbs(&portdata->delayed);
1025 break;
1026 }
1027 }
1028
1029 if (portdata->opened) {
1030 err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
1031 if (err)
1032 ec++;
1033 }
1034 }
1035 intfdata->suspended = 0;
1036 spin_unlock_irq(&intfdata->susp_lock);
1037
1038 return ec ? -EIO : 0;
1039 }
1040
1041 #else
1042 #define sierra_suspend NULL
1043 #define sierra_resume NULL
1044 #endif
1045
1046 static struct usb_serial_driver sierra_device = {
1047 .driver = {
1048 .owner = THIS_MODULE,
1049 .name = "sierra",
1050 },
1051 .description = "Sierra USB modem",
1052 .id_table = id_table,
1053 .calc_num_ports = sierra_calc_num_ports,
1054 .probe = sierra_probe,
1055 .open = sierra_open,
1056 .close = sierra_close,
1057 .dtr_rts = sierra_dtr_rts,
1058 .write = sierra_write,
1059 .write_room = sierra_write_room,
1060 .set_termios = sierra_set_termios,
1061 .tiocmget = sierra_tiocmget,
1062 .tiocmset = sierra_tiocmset,
1063 .attach = sierra_startup,
1064 .release = sierra_release,
1065 .suspend = sierra_suspend,
1066 .resume = sierra_resume,
1067 .read_int_callback = sierra_instat_callback,
1068 };
1069
1070 static struct usb_serial_driver * const serial_drivers[] = {
1071 &sierra_device, NULL
1072 };
1073
1074 module_usb_serial_driver(serial_drivers, id_table);
1075
1076 MODULE_AUTHOR(DRIVER_AUTHOR);
1077 MODULE_DESCRIPTION(DRIVER_DESC);
1078 MODULE_VERSION(DRIVER_VERSION);
1079 MODULE_LICENSE("GPL");
1080
1081 module_param(nmea, bool, S_IRUGO | S_IWUSR);
1082 MODULE_PARM_DESC(nmea, "NMEA streaming");
Linux kernel - Deliverables
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