projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
USB: sierra: fix resume error reporting
[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
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 unsigned int open_ports;
62 };
63
64 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
65 {
66 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
67 SWIMS_USB_REQUEST_SetPower, /* __u8 request */
68 USB_TYPE_VENDOR, /* __u8 request type */
69 swiState, /* __u16 value */
70 0, /* __u16 index */
71 NULL, /* void *data */
72 0, /* __u16 size */
73 USB_CTRL_SET_TIMEOUT); /* int timeout */
74 }
75
76 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
77 {
78 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
79 SWIMS_USB_REQUEST_SetNmea, /* __u8 request */
80 USB_TYPE_VENDOR, /* __u8 request type */
81 enable, /* __u16 value */
82 0x0000, /* __u16 index */
83 NULL, /* void *data */
84 0, /* __u16 size */
85 USB_CTRL_SET_TIMEOUT); /* int timeout */
86 }
87
88 static int sierra_calc_num_ports(struct usb_serial *serial)
89 {
90 int num_ports = 0;
91 u8 ifnum, numendpoints;
92
93 ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
94 numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
95
96 /* Dummy interface present on some SKUs should be ignored */
97 if (ifnum == 0x99)
98 num_ports = 0;
99 else if (numendpoints <= 3)
100 num_ports = 1;
101 else
102 num_ports = (numendpoints-1)/2;
103 return num_ports;
104 }
105
106 static int is_blacklisted(const u8 ifnum,
107 const struct sierra_iface_info *blacklist)
108 {
109 const u8 *info;
110 int i;
111
112 if (blacklist) {
113 info = blacklist->ifaceinfo;
114
115 for (i = 0; i < blacklist->infolen; i++) {
116 if (info[i] == ifnum)
117 return 1;
118 }
119 }
120 return 0;
121 }
122
123 static int is_himemory(const u8 ifnum,
124 const struct sierra_iface_info *himemorylist)
125 {
126 const u8 *info;
127 int i;
128
129 if (himemorylist) {
130 info = himemorylist->ifaceinfo;
131
132 for (i=0; i < himemorylist->infolen; i++) {
133 if (info[i] == ifnum)
134 return 1;
135 }
136 }
137 return 0;
138 }
139
140 static int sierra_calc_interface(struct usb_serial *serial)
141 {
142 int interface;
143 struct usb_interface *p_interface;
144 struct usb_host_interface *p_host_interface;
145
146 /* Get the interface structure pointer from the serial struct */
147 p_interface = serial->interface;
148
149 /* Get a pointer to the host interface structure */
150 p_host_interface = p_interface->cur_altsetting;
151
152 /* read the interface descriptor for this active altsetting
153 * to find out the interface number we are on
154 */
155 interface = p_host_interface->desc.bInterfaceNumber;
156
157 return interface;
158 }
159
160 static int sierra_probe(struct usb_serial *serial,
161 const struct usb_device_id *id)
162 {
163 int result = 0;
164 struct usb_device *udev;
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 return result;
192 }
193
194 /* interfaces with higher memory requirements */
195 static const u8 hi_memory_typeA_ifaces[] = { 0, 2 };
196 static const struct sierra_iface_info typeA_interface_list = {
197 .infolen = ARRAY_SIZE(hi_memory_typeA_ifaces),
198 .ifaceinfo = hi_memory_typeA_ifaces,
199 };
200
201 static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 };
202 static const struct sierra_iface_info typeB_interface_list = {
203 .infolen = ARRAY_SIZE(hi_memory_typeB_ifaces),
204 .ifaceinfo = hi_memory_typeB_ifaces,
205 };
206
207 /* 'blacklist' of interfaces not served by this driver */
208 static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11, 19, 20 };
209 static const struct sierra_iface_info direct_ip_interface_blacklist = {
210 .infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces),
211 .ifaceinfo = direct_ip_non_serial_ifaces,
212 };
213
214 static const struct usb_device_id id_table[] = {
215 { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
216 { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */
217 { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */
218 { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */
219
220 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
221 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
222 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
223 { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
224 { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
225 { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */
226 { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
227 { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */
228 { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
229 { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
230 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
231 { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
232 { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U */
233 /* Sierra Wireless C597 */
234 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
235 /* Sierra Wireless T598 */
236 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
237 { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */
238 { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */
239 { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */
240 { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */
241
242 { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
243 { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
244 { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
245 { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */
246 { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */
247 { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */
248 { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
249 { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */
250 { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
251 { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */
252 { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
253 { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
254 { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */
255 { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
256 { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
257 { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */
258 { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */
259 { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */
260 { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */
261 { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
262 { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
263 /* Sierra Wireless MC8790, MC8791, MC8792 Composite */
264 { USB_DEVICE(0x1199, 0x683C) },
265 { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
266 /* Sierra Wireless MC8790, MC8791, MC8792 */
267 { USB_DEVICE(0x1199, 0x683E) },
268 { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
269 { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
270 { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
271 { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
272 { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
273 { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
274 { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
275 { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
276 /* Sierra Wireless C885 */
277 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
278 /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */
279 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
280 /* Sierra Wireless C22/C33 */
281 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
282 /* Sierra Wireless HSPA Non-Composite Device */
283 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
284 { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */
285 { USB_DEVICE(0x1199, 0x68A3), /* Sierra Wireless Direct IP modems */
286 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
287 },
288 /* AT&T Direct IP LTE modems */
289 { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68AA, 0xFF, 0xFF, 0xFF),
290 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
291 },
292 { USB_DEVICE(0x0f3d, 0x68A3), /* Airprime/Sierra Wireless Direct IP modems */
293 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
294 },
295
296 { }
297 };
298 MODULE_DEVICE_TABLE(usb, id_table);
299
300
301 struct sierra_port_private {
302 spinlock_t lock; /* lock the structure */
303 int outstanding_urbs; /* number of out urbs in flight */
304 struct usb_anchor active;
305 struct usb_anchor delayed;
306
307 int num_out_urbs;
308 int num_in_urbs;
309 /* Input endpoints and buffers for this port */
310 struct urb *in_urbs[N_IN_URB_HM];
311
312 /* Settings for the port */
313 int rts_state; /* Handshaking pins (outputs) */
314 int dtr_state;
315 int cts_state; /* Handshaking pins (inputs) */
316 int dsr_state;
317 int dcd_state;
318 int ri_state;
319 unsigned int opened:1;
320 };
321
322 static int sierra_send_setup(struct usb_serial_port *port)
323 {
324 struct usb_serial *serial = port->serial;
325 struct sierra_port_private *portdata;
326 __u16 interface = 0;
327 int val = 0;
328 int do_send = 0;
329 int retval;
330
331 portdata = usb_get_serial_port_data(port);
332
333 if (portdata->dtr_state)
334 val |= 0x01;
335 if (portdata->rts_state)
336 val |= 0x02;
337
338 /* If composite device then properly report interface */
339 if (serial->num_ports == 1) {
340 interface = sierra_calc_interface(serial);
341 /* Control message is sent only to interfaces with
342 * interrupt_in endpoints
343 */
344 if (port->interrupt_in_urb) {
345 /* send control message */
346 do_send = 1;
347 }
348 }
349
350 /* Otherwise the need to do non-composite mapping */
351 else {
352 if (port->bulk_out_endpointAddress == 2)
353 interface = 0;
354 else if (port->bulk_out_endpointAddress == 4)
355 interface = 1;
356 else if (port->bulk_out_endpointAddress == 5)
357 interface = 2;
358
359 do_send = 1;
360 }
361 if (!do_send)
362 return 0;
363
364 retval = usb_autopm_get_interface(serial->interface);
365 if (retval < 0)
366 return retval;
367
368 retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
369 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
370 usb_autopm_put_interface(serial->interface);
371
372 return retval;
373 }
374
375 static void sierra_set_termios(struct tty_struct *tty,
376 struct usb_serial_port *port, struct ktermios *old_termios)
377 {
378 tty_termios_copy_hw(&tty->termios, old_termios);
379 sierra_send_setup(port);
380 }
381
382 static int sierra_tiocmget(struct tty_struct *tty)
383 {
384 struct usb_serial_port *port = tty->driver_data;
385 unsigned int value;
386 struct sierra_port_private *portdata;
387
388 portdata = usb_get_serial_port_data(port);
389
390 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
391 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
392 ((portdata->cts_state) ? TIOCM_CTS : 0) |
393 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
394 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
395 ((portdata->ri_state) ? TIOCM_RNG : 0);
396
397 return value;
398 }
399
400 static int sierra_tiocmset(struct tty_struct *tty,
401 unsigned int set, unsigned int clear)
402 {
403 struct usb_serial_port *port = tty->driver_data;
404 struct sierra_port_private *portdata;
405
406 portdata = usb_get_serial_port_data(port);
407
408 if (set & TIOCM_RTS)
409 portdata->rts_state = 1;
410 if (set & TIOCM_DTR)
411 portdata->dtr_state = 1;
412
413 if (clear & TIOCM_RTS)
414 portdata->rts_state = 0;
415 if (clear & TIOCM_DTR)
416 portdata->dtr_state = 0;
417 return sierra_send_setup(port);
418 }
419
420 static void sierra_release_urb(struct urb *urb)
421 {
422 struct usb_serial_port *port;
423 if (urb) {
424 port = urb->context;
425 kfree(urb->transfer_buffer);
426 usb_free_urb(urb);
427 }
428 }
429
430 static void sierra_outdat_callback(struct urb *urb)
431 {
432 struct usb_serial_port *port = urb->context;
433 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
434 struct sierra_intf_private *intfdata;
435 int status = urb->status;
436
437 intfdata = port->serial->private;
438
439 /* free up the transfer buffer, as usb_free_urb() does not do this */
440 kfree(urb->transfer_buffer);
441 usb_autopm_put_interface_async(port->serial->interface);
442 if (status)
443 dev_dbg(&port->dev, "%s - nonzero write bulk status "
444 "received: %d\n", __func__, status);
445
446 spin_lock(&portdata->lock);
447 --portdata->outstanding_urbs;
448 spin_unlock(&portdata->lock);
449 spin_lock(&intfdata->susp_lock);
450 --intfdata->in_flight;
451 spin_unlock(&intfdata->susp_lock);
452
453 usb_serial_port_softint(port);
454 }
455
456 /* Write */
457 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
458 const unsigned char *buf, int count)
459 {
460 struct sierra_port_private *portdata;
461 struct sierra_intf_private *intfdata;
462 struct usb_serial *serial = port->serial;
463 unsigned long flags;
464 unsigned char *buffer;
465 struct urb *urb;
466 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
467 int retval = 0;
468
469 /* verify that we actually have some data to write */
470 if (count == 0)
471 return 0;
472
473 portdata = usb_get_serial_port_data(port);
474 intfdata = serial->private;
475
476 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
477 spin_lock_irqsave(&portdata->lock, flags);
478 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
479 portdata->outstanding_urbs);
480 if (portdata->outstanding_urbs > portdata->num_out_urbs) {
481 spin_unlock_irqrestore(&portdata->lock, flags);
482 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
483 return 0;
484 }
485 portdata->outstanding_urbs++;
486 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
487 portdata->outstanding_urbs);
488 spin_unlock_irqrestore(&portdata->lock, flags);
489
490 retval = usb_autopm_get_interface_async(serial->interface);
491 if (retval < 0) {
492 spin_lock_irqsave(&portdata->lock, flags);
493 portdata->outstanding_urbs--;
494 spin_unlock_irqrestore(&portdata->lock, flags);
495 goto error_simple;
496 }
497
498 buffer = kmalloc(writesize, GFP_ATOMIC);
499 if (!buffer) {
500 retval = -ENOMEM;
501 goto error_no_buffer;
502 }
503
504 urb = usb_alloc_urb(0, GFP_ATOMIC);
505 if (!urb) {
506 retval = -ENOMEM;
507 goto error_no_urb;
508 }
509
510 memcpy(buffer, buf, writesize);
511
512 usb_serial_debug_data(&port->dev, __func__, writesize, buffer);
513
514 usb_fill_bulk_urb(urb, serial->dev,
515 usb_sndbulkpipe(serial->dev,
516 port->bulk_out_endpointAddress),
517 buffer, writesize, sierra_outdat_callback, port);
518
519 /* Handle the need to send a zero length packet */
520 urb->transfer_flags |= URB_ZERO_PACKET;
521
522 spin_lock_irqsave(&intfdata->susp_lock, flags);
523
524 if (intfdata->suspended) {
525 usb_anchor_urb(urb, &portdata->delayed);
526 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
527 goto skip_power;
528 } else {
529 usb_anchor_urb(urb, &portdata->active);
530 }
531 /* send it down the pipe */
532 retval = usb_submit_urb(urb, GFP_ATOMIC);
533 if (retval) {
534 usb_unanchor_urb(urb);
535 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
536 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
537 "with status = %d\n", __func__, retval);
538 goto error;
539 } else {
540 intfdata->in_flight++;
541 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
542 }
543
544 skip_power:
545 /* we are done with this urb, so let the host driver
546 * really free it when it is finished with it */
547 usb_free_urb(urb);
548
549 return writesize;
550 error:
551 usb_free_urb(urb);
552 error_no_urb:
553 kfree(buffer);
554 error_no_buffer:
555 spin_lock_irqsave(&portdata->lock, flags);
556 --portdata->outstanding_urbs;
557 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
558 portdata->outstanding_urbs);
559 spin_unlock_irqrestore(&portdata->lock, flags);
560 usb_autopm_put_interface_async(serial->interface);
561 error_simple:
562 return retval;
563 }
564
565 static void sierra_indat_callback(struct urb *urb)
566 {
567 int err;
568 int endpoint;
569 struct usb_serial_port *port;
570 unsigned char *data = urb->transfer_buffer;
571 int status = urb->status;
572
573 endpoint = usb_pipeendpoint(urb->pipe);
574 port = urb->context;
575
576 if (status) {
577 dev_dbg(&port->dev, "%s: nonzero status: %d on"
578 " endpoint %02x\n", __func__, status, endpoint);
579 } else {
580 if (urb->actual_length) {
581 tty_insert_flip_string(&port->port, data,
582 urb->actual_length);
583 tty_flip_buffer_push(&port->port);
584
585 usb_serial_debug_data(&port->dev, __func__,
586 urb->actual_length, data);
587 } else {
588 dev_dbg(&port->dev, "%s: empty read urb"
589 " received\n", __func__);
590 }
591 }
592
593 /* Resubmit urb so we continue receiving */
594 if (status != -ESHUTDOWN && status != -EPERM) {
595 usb_mark_last_busy(port->serial->dev);
596 err = usb_submit_urb(urb, GFP_ATOMIC);
597 if (err && err != -EPERM)
598 dev_err(&port->dev, "resubmit read urb failed."
599 "(%d)\n", err);
600 }
601 }
602
603 static void sierra_instat_callback(struct urb *urb)
604 {
605 int err;
606 int status = urb->status;
607 struct usb_serial_port *port = urb->context;
608 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
609 struct usb_serial *serial = port->serial;
610
611 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
612 urb, port, portdata);
613
614 if (status == 0) {
615 struct usb_ctrlrequest *req_pkt =
616 (struct usb_ctrlrequest *)urb->transfer_buffer;
617
618 if (!req_pkt) {
619 dev_dbg(&port->dev, "%s: NULL req_pkt\n",
620 __func__);
621 return;
622 }
623 if ((req_pkt->bRequestType == 0xA1) &&
624 (req_pkt->bRequest == 0x20)) {
625 int old_dcd_state;
626 unsigned char signals = *((unsigned char *)
627 urb->transfer_buffer +
628 sizeof(struct usb_ctrlrequest));
629
630 dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
631 signals);
632
633 old_dcd_state = portdata->dcd_state;
634 portdata->cts_state = 1;
635 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
636 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
637 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
638
639 if (old_dcd_state && !portdata->dcd_state)
640 tty_port_tty_hangup(&port->port, true);
641 } else {
642 dev_dbg(&port->dev, "%s: type %x req %x\n",
643 __func__, req_pkt->bRequestType,
644 req_pkt->bRequest);
645 }
646 } else
647 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
648
649 /* Resubmit urb so we continue receiving IRQ data */
650 if (status != -ESHUTDOWN && status != -ENOENT) {
651 usb_mark_last_busy(serial->dev);
652 err = usb_submit_urb(urb, GFP_ATOMIC);
653 if (err && err != -EPERM)
654 dev_err(&port->dev, "%s: resubmit intr urb "
655 "failed. (%d)\n", __func__, err);
656 }
657 }
658
659 static int sierra_write_room(struct tty_struct *tty)
660 {
661 struct usb_serial_port *port = tty->driver_data;
662 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
663 unsigned long flags;
664
665 /* try to give a good number back based on if we have any free urbs at
666 * this point in time */
667 spin_lock_irqsave(&portdata->lock, flags);
668 if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) {
669 spin_unlock_irqrestore(&portdata->lock, flags);
670 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
671 return 0;
672 }
673 spin_unlock_irqrestore(&portdata->lock, flags);
674
675 return 2048;
676 }
677
678 static int sierra_chars_in_buffer(struct tty_struct *tty)
679 {
680 struct usb_serial_port *port = tty->driver_data;
681 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
682 unsigned long flags;
683 int chars;
684
685 /* NOTE: This overcounts somewhat. */
686 spin_lock_irqsave(&portdata->lock, flags);
687 chars = portdata->outstanding_urbs * MAX_TRANSFER;
688 spin_unlock_irqrestore(&portdata->lock, flags);
689
690 dev_dbg(&port->dev, "%s - %d\n", __func__, chars);
691
692 return chars;
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)
755 return NULL;
756
757 buf = kmalloc(len, mem_flags);
758 if (buf) {
759 /* Fill URB using supplied data */
760 usb_fill_bulk_urb(urb, serial->dev,
761 usb_sndbulkpipe(serial->dev, endpoint) | dir,
762 buf, len, callback, ctx);
763
764 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
765 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
766 } else {
767 sierra_release_urb(urb);
768 urb = NULL;
769 }
770
771 return urb;
772 }
773
774 static void sierra_close(struct usb_serial_port *port)
775 {
776 int i;
777 struct usb_serial *serial = port->serial;
778 struct sierra_port_private *portdata;
779 struct sierra_intf_private *intfdata = port->serial->private;
780 struct urb *urb;
781
782 portdata = usb_get_serial_port_data(port);
783
784 portdata->rts_state = 0;
785 portdata->dtr_state = 0;
786
787 mutex_lock(&serial->disc_mutex);
788 if (!serial->disconnected) {
789 /* odd error handling due to pm counters */
790 if (!usb_autopm_get_interface(serial->interface))
791 sierra_send_setup(port);
792 else
793 usb_autopm_get_interface_no_resume(serial->interface);
794
795 }
796 mutex_unlock(&serial->disc_mutex);
797 spin_lock_irq(&intfdata->susp_lock);
798 portdata->opened = 0;
799 if (--intfdata->open_ports == 0)
800 serial->interface->needs_remote_wakeup = 0;
801 spin_unlock_irq(&intfdata->susp_lock);
802
803 for (;;) {
804 urb = usb_get_from_anchor(&portdata->delayed);
805 if (!urb)
806 break;
807 kfree(urb->transfer_buffer);
808 usb_free_urb(urb);
809 usb_autopm_put_interface_async(serial->interface);
810 spin_lock(&portdata->lock);
811 portdata->outstanding_urbs--;
812 spin_unlock(&portdata->lock);
813 }
814
815 sierra_stop_rx_urbs(port);
816 usb_kill_anchored_urbs(&portdata->active);
817
818 for (i = 0; i < portdata->num_in_urbs; i++) {
819 sierra_release_urb(portdata->in_urbs[i]);
820 portdata->in_urbs[i] = NULL;
821 }
822 }
823
824 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
825 {
826 struct sierra_port_private *portdata;
827 struct usb_serial *serial = port->serial;
828 struct sierra_intf_private *intfdata = serial->private;
829 int i;
830 int err;
831 int endpoint;
832 struct urb *urb;
833
834 portdata = usb_get_serial_port_data(port);
835
836 /* Set some sane defaults */
837 portdata->rts_state = 1;
838 portdata->dtr_state = 1;
839
840
841 endpoint = port->bulk_in_endpointAddress;
842 for (i = 0; i < portdata->num_in_urbs; i++) {
843 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
844 IN_BUFLEN, GFP_KERNEL,
845 sierra_indat_callback);
846 portdata->in_urbs[i] = urb;
847 }
848 /* clear halt condition */
849 usb_clear_halt(serial->dev,
850 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
851
852 err = sierra_submit_rx_urbs(port, GFP_KERNEL);
853 if (err)
854 goto err_submit;
855
856 sierra_send_setup(port);
857
858 spin_lock_irq(&intfdata->susp_lock);
859 portdata->opened = 1;
860 if (++intfdata->open_ports == 1)
861 serial->interface->needs_remote_wakeup = 1;
862 spin_unlock_irq(&intfdata->susp_lock);
863 usb_autopm_put_interface(serial->interface);
864
865 return 0;
866
867 err_submit:
868 sierra_stop_rx_urbs(port);
869
870 for (i = 0; i < portdata->num_in_urbs; i++) {
871 sierra_release_urb(portdata->in_urbs[i]);
872 portdata->in_urbs[i] = NULL;
873 }
874
875 return err;
876 }
877
878
879 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
880 {
881 struct sierra_port_private *portdata;
882
883 portdata = usb_get_serial_port_data(port);
884 portdata->rts_state = on;
885 portdata->dtr_state = on;
886
887 sierra_send_setup(port);
888 }
889
890 static int sierra_startup(struct usb_serial *serial)
891 {
892 struct sierra_intf_private *intfdata;
893
894 intfdata = kzalloc(sizeof(*intfdata), GFP_KERNEL);
895 if (!intfdata)
896 return -ENOMEM;
897
898 spin_lock_init(&intfdata->susp_lock);
899
900 usb_set_serial_data(serial, intfdata);
901
902 /* Set Device mode to D0 */
903 sierra_set_power_state(serial->dev, 0x0000);
904
905 /* Check NMEA and set */
906 if (nmea)
907 sierra_vsc_set_nmea(serial->dev, 1);
908
909 return 0;
910 }
911
912 static void sierra_release(struct usb_serial *serial)
913 {
914 struct sierra_intf_private *intfdata;
915
916 intfdata = usb_get_serial_data(serial);
917 kfree(intfdata);
918 }
919
920 static int sierra_port_probe(struct usb_serial_port *port)
921 {
922 struct usb_serial *serial = port->serial;
923 struct sierra_port_private *portdata;
924 const struct sierra_iface_info *himemoryp;
925 u8 ifnum;
926
927 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
928 if (!portdata)
929 return -ENOMEM;
930
931 spin_lock_init(&portdata->lock);
932 init_usb_anchor(&portdata->active);
933 init_usb_anchor(&portdata->delayed);
934
935 /* Assume low memory requirements */
936 portdata->num_out_urbs = N_OUT_URB;
937 portdata->num_in_urbs = N_IN_URB;
938
939 /* Determine actual memory requirements */
940 if (serial->num_ports == 1) {
941 /* Get interface number for composite device */
942 ifnum = sierra_calc_interface(serial);
943 himemoryp = &typeB_interface_list;
944 } else {
945 /* This is really the usb-serial port number of the interface
946 * rather than the interface number.
947 */
948 ifnum = port->port_number;
949 himemoryp = &typeA_interface_list;
950 }
951
952 if (is_himemory(ifnum, himemoryp)) {
953 portdata->num_out_urbs = N_OUT_URB_HM;
954 portdata->num_in_urbs = N_IN_URB_HM;
955 }
956
957 dev_dbg(&port->dev,
958 "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
959 ifnum, portdata->num_in_urbs, portdata->num_out_urbs);
960
961 usb_set_serial_port_data(port, portdata);
962
963 return 0;
964 }
965
966 static int sierra_port_remove(struct usb_serial_port *port)
967 {
968 struct sierra_port_private *portdata;
969
970 portdata = usb_get_serial_port_data(port);
971 usb_set_serial_port_data(port, NULL);
972 kfree(portdata);
973
974 return 0;
975 }
976
977 #ifdef CONFIG_PM
978 static void stop_read_write_urbs(struct usb_serial *serial)
979 {
980 int i;
981 struct usb_serial_port *port;
982 struct sierra_port_private *portdata;
983
984 /* Stop reading/writing urbs */
985 for (i = 0; i < serial->num_ports; ++i) {
986 port = serial->port[i];
987 portdata = usb_get_serial_port_data(port);
988 if (!portdata)
989 continue;
990 sierra_stop_rx_urbs(port);
991 usb_kill_anchored_urbs(&portdata->active);
992 }
993 }
994
995 static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
996 {
997 struct sierra_intf_private *intfdata;
998 int b;
999
1000 if (PMSG_IS_AUTO(message)) {
1001 intfdata = serial->private;
1002 spin_lock_irq(&intfdata->susp_lock);
1003 b = intfdata->in_flight;
1004
1005 if (b) {
1006 spin_unlock_irq(&intfdata->susp_lock);
1007 return -EBUSY;
1008 } else {
1009 intfdata->suspended = 1;
1010 spin_unlock_irq(&intfdata->susp_lock);
1011 }
1012 }
1013 stop_read_write_urbs(serial);
1014
1015 return 0;
1016 }
1017
1018 static int sierra_resume(struct usb_serial *serial)
1019 {
1020 struct usb_serial_port *port;
1021 struct sierra_intf_private *intfdata = serial->private;
1022 struct sierra_port_private *portdata;
1023 struct urb *urb;
1024 int ec = 0;
1025 int i, err;
1026
1027 spin_lock_irq(&intfdata->susp_lock);
1028 for (i = 0; i < serial->num_ports; i++) {
1029 port = serial->port[i];
1030 portdata = usb_get_serial_port_data(port);
1031
1032 if (!portdata)
1033 continue;
1034
1035 while ((urb = usb_get_from_anchor(&portdata->delayed))) {
1036 usb_anchor_urb(urb, &portdata->active);
1037 intfdata->in_flight++;
1038 err = usb_submit_urb(urb, GFP_ATOMIC);
1039 if (err < 0) {
1040 dev_err(&port->dev,
1041 "%s - submit urb failed: %d",
1042 __func__, err);
1043 ec++;
1044 intfdata->in_flight--;
1045 usb_unanchor_urb(urb);
1046 kfree(urb->transfer_buffer);
1047 usb_free_urb(urb);
1048 spin_lock(&portdata->lock);
1049 portdata->outstanding_urbs--;
1050 spin_unlock(&portdata->lock);
1051 continue;
1052 }
1053 }
1054
1055 if (portdata->opened) {
1056 err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
1057 if (err)
1058 ec++;
1059 }
1060 }
1061 intfdata->suspended = 0;
1062 spin_unlock_irq(&intfdata->susp_lock);
1063
1064 return ec ? -EIO : 0;
1065 }
1066
1067 #else
1068 #define sierra_suspend NULL
1069 #define sierra_resume NULL
1070 #endif
1071
1072 static struct usb_serial_driver sierra_device = {
1073 .driver = {
1074 .owner = THIS_MODULE,
1075 .name = "sierra",
1076 },
1077 .description = "Sierra USB modem",
1078 .id_table = id_table,
1079 .calc_num_ports = sierra_calc_num_ports,
1080 .probe = sierra_probe,
1081 .open = sierra_open,
1082 .close = sierra_close,
1083 .dtr_rts = sierra_dtr_rts,
1084 .write = sierra_write,
1085 .write_room = sierra_write_room,
1086 .chars_in_buffer = sierra_chars_in_buffer,
1087 .set_termios = sierra_set_termios,
1088 .tiocmget = sierra_tiocmget,
1089 .tiocmset = sierra_tiocmset,
1090 .attach = sierra_startup,
1091 .release = sierra_release,
1092 .port_probe = sierra_port_probe,
1093 .port_remove = sierra_port_remove,
1094 .suspend = sierra_suspend,
1095 .resume = sierra_resume,
1096 .read_int_callback = sierra_instat_callback,
1097 };
1098
1099 static struct usb_serial_driver * const serial_drivers[] = {
1100 &sierra_device, NULL
1101 };
1102
1103 module_usb_serial_driver(serial_drivers, id_table);
1104
1105 MODULE_AUTHOR(DRIVER_AUTHOR);
1106 MODULE_DESCRIPTION(DRIVER_DESC);
1107 MODULE_LICENSE("GPL");
1108
1109 module_param(nmea, bool, S_IRUGO | S_IWUSR);
1110 MODULE_PARM_DESC(nmea, "NMEA streaming");
Linux kernel - Deliverables
This page took 0.186204 seconds and 6 git commands to generate.