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Merge tag 'drm-amdkfd-next-fixes-2015-06-10' of git://people.freedesktop.org/~gabbayo...
[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 /* Sierra Wireless Direct IP modems */
286 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x68A3, 0xFF, 0xFF, 0xFF),
287 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
288 },
289 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x68AA, 0xFF, 0xFF, 0xFF),
290 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
291 },
292 /* AT&T Direct IP LTE modems */
293 { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68AA, 0xFF, 0xFF, 0xFF),
294 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
295 },
296 /* Airprime/Sierra Wireless Direct IP modems */
297 { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68A3, 0xFF, 0xFF, 0xFF),
298 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
299 },
300
301 { }
302 };
303 MODULE_DEVICE_TABLE(usb, id_table);
304
305
306 struct sierra_port_private {
307 spinlock_t lock; /* lock the structure */
308 int outstanding_urbs; /* number of out urbs in flight */
309 struct usb_anchor active;
310 struct usb_anchor delayed;
311
312 int num_out_urbs;
313 int num_in_urbs;
314 /* Input endpoints and buffers for this port */
315 struct urb *in_urbs[N_IN_URB_HM];
316
317 /* Settings for the port */
318 int rts_state; /* Handshaking pins (outputs) */
319 int dtr_state;
320 int cts_state; /* Handshaking pins (inputs) */
321 int dsr_state;
322 int dcd_state;
323 int ri_state;
324 };
325
326 static int sierra_send_setup(struct usb_serial_port *port)
327 {
328 struct usb_serial *serial = port->serial;
329 struct sierra_port_private *portdata;
330 __u16 interface = 0;
331 int val = 0;
332 int do_send = 0;
333 int retval;
334
335 portdata = usb_get_serial_port_data(port);
336
337 if (portdata->dtr_state)
338 val |= 0x01;
339 if (portdata->rts_state)
340 val |= 0x02;
341
342 /* If composite device then properly report interface */
343 if (serial->num_ports == 1) {
344 interface = sierra_calc_interface(serial);
345 /* Control message is sent only to interfaces with
346 * interrupt_in endpoints
347 */
348 if (port->interrupt_in_urb) {
349 /* send control message */
350 do_send = 1;
351 }
352 }
353
354 /* Otherwise the need to do non-composite mapping */
355 else {
356 if (port->bulk_out_endpointAddress == 2)
357 interface = 0;
358 else if (port->bulk_out_endpointAddress == 4)
359 interface = 1;
360 else if (port->bulk_out_endpointAddress == 5)
361 interface = 2;
362
363 do_send = 1;
364 }
365 if (!do_send)
366 return 0;
367
368 retval = usb_autopm_get_interface(serial->interface);
369 if (retval < 0)
370 return retval;
371
372 retval = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
373 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
374 usb_autopm_put_interface(serial->interface);
375
376 return retval;
377 }
378
379 static int sierra_tiocmget(struct tty_struct *tty)
380 {
381 struct usb_serial_port *port = tty->driver_data;
382 unsigned int value;
383 struct sierra_port_private *portdata;
384
385 portdata = usb_get_serial_port_data(port);
386
387 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
388 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
389 ((portdata->cts_state) ? TIOCM_CTS : 0) |
390 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
391 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
392 ((portdata->ri_state) ? TIOCM_RNG : 0);
393
394 return value;
395 }
396
397 static int sierra_tiocmset(struct tty_struct *tty,
398 unsigned int set, unsigned int clear)
399 {
400 struct usb_serial_port *port = tty->driver_data;
401 struct sierra_port_private *portdata;
402
403 portdata = usb_get_serial_port_data(port);
404
405 if (set & TIOCM_RTS)
406 portdata->rts_state = 1;
407 if (set & TIOCM_DTR)
408 portdata->dtr_state = 1;
409
410 if (clear & TIOCM_RTS)
411 portdata->rts_state = 0;
412 if (clear & TIOCM_DTR)
413 portdata->dtr_state = 0;
414 return sierra_send_setup(port);
415 }
416
417 static void sierra_release_urb(struct urb *urb)
418 {
419 if (urb) {
420 kfree(urb->transfer_buffer);
421 usb_free_urb(urb);
422 }
423 }
424
425 static void sierra_outdat_callback(struct urb *urb)
426 {
427 struct usb_serial_port *port = urb->context;
428 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
429 struct sierra_intf_private *intfdata;
430 int status = urb->status;
431
432 intfdata = usb_get_serial_data(port->serial);
433
434 /* free up the transfer buffer, as usb_free_urb() does not do this */
435 kfree(urb->transfer_buffer);
436 usb_autopm_put_interface_async(port->serial->interface);
437 if (status)
438 dev_dbg(&port->dev, "%s - nonzero write bulk status "
439 "received: %d\n", __func__, status);
440
441 spin_lock(&portdata->lock);
442 --portdata->outstanding_urbs;
443 spin_unlock(&portdata->lock);
444 spin_lock(&intfdata->susp_lock);
445 --intfdata->in_flight;
446 spin_unlock(&intfdata->susp_lock);
447
448 usb_serial_port_softint(port);
449 }
450
451 /* Write */
452 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
453 const unsigned char *buf, int count)
454 {
455 struct sierra_port_private *portdata;
456 struct sierra_intf_private *intfdata;
457 struct usb_serial *serial = port->serial;
458 unsigned long flags;
459 unsigned char *buffer;
460 struct urb *urb;
461 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
462 int retval = 0;
463
464 /* verify that we actually have some data to write */
465 if (count == 0)
466 return 0;
467
468 portdata = usb_get_serial_port_data(port);
469 intfdata = usb_get_serial_data(serial);
470
471 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
472 spin_lock_irqsave(&portdata->lock, flags);
473 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
474 portdata->outstanding_urbs);
475 if (portdata->outstanding_urbs > portdata->num_out_urbs) {
476 spin_unlock_irqrestore(&portdata->lock, flags);
477 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
478 return 0;
479 }
480 portdata->outstanding_urbs++;
481 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
482 portdata->outstanding_urbs);
483 spin_unlock_irqrestore(&portdata->lock, flags);
484
485 retval = usb_autopm_get_interface_async(serial->interface);
486 if (retval < 0) {
487 spin_lock_irqsave(&portdata->lock, flags);
488 portdata->outstanding_urbs--;
489 spin_unlock_irqrestore(&portdata->lock, flags);
490 goto error_simple;
491 }
492
493 buffer = kmalloc(writesize, GFP_ATOMIC);
494 if (!buffer) {
495 retval = -ENOMEM;
496 goto error_no_buffer;
497 }
498
499 urb = usb_alloc_urb(0, GFP_ATOMIC);
500 if (!urb) {
501 retval = -ENOMEM;
502 goto error_no_urb;
503 }
504
505 memcpy(buffer, buf, writesize);
506
507 usb_serial_debug_data(&port->dev, __func__, writesize, buffer);
508
509 usb_fill_bulk_urb(urb, serial->dev,
510 usb_sndbulkpipe(serial->dev,
511 port->bulk_out_endpointAddress),
512 buffer, writesize, sierra_outdat_callback, port);
513
514 /* Handle the need to send a zero length packet */
515 urb->transfer_flags |= URB_ZERO_PACKET;
516
517 spin_lock_irqsave(&intfdata->susp_lock, flags);
518
519 if (intfdata->suspended) {
520 usb_anchor_urb(urb, &portdata->delayed);
521 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
522 goto skip_power;
523 } else {
524 usb_anchor_urb(urb, &portdata->active);
525 }
526 /* send it down the pipe */
527 retval = usb_submit_urb(urb, GFP_ATOMIC);
528 if (retval) {
529 usb_unanchor_urb(urb);
530 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
531 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
532 "with status = %d\n", __func__, retval);
533 goto error;
534 } else {
535 intfdata->in_flight++;
536 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
537 }
538
539 skip_power:
540 /* we are done with this urb, so let the host driver
541 * really free it when it is finished with it */
542 usb_free_urb(urb);
543
544 return writesize;
545 error:
546 usb_free_urb(urb);
547 error_no_urb:
548 kfree(buffer);
549 error_no_buffer:
550 spin_lock_irqsave(&portdata->lock, flags);
551 --portdata->outstanding_urbs;
552 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
553 portdata->outstanding_urbs);
554 spin_unlock_irqrestore(&portdata->lock, flags);
555 usb_autopm_put_interface_async(serial->interface);
556 error_simple:
557 return retval;
558 }
559
560 static void sierra_indat_callback(struct urb *urb)
561 {
562 int err;
563 int endpoint;
564 struct usb_serial_port *port;
565 unsigned char *data = urb->transfer_buffer;
566 int status = urb->status;
567
568 endpoint = usb_pipeendpoint(urb->pipe);
569 port = urb->context;
570
571 if (status) {
572 dev_dbg(&port->dev, "%s: nonzero status: %d on"
573 " endpoint %02x\n", __func__, status, endpoint);
574 } else {
575 if (urb->actual_length) {
576 tty_insert_flip_string(&port->port, data,
577 urb->actual_length);
578 tty_flip_buffer_push(&port->port);
579
580 usb_serial_debug_data(&port->dev, __func__,
581 urb->actual_length, data);
582 } else {
583 dev_dbg(&port->dev, "%s: empty read urb"
584 " received\n", __func__);
585 }
586 }
587
588 /* Resubmit urb so we continue receiving */
589 if (status != -ESHUTDOWN && status != -EPERM) {
590 usb_mark_last_busy(port->serial->dev);
591 err = usb_submit_urb(urb, GFP_ATOMIC);
592 if (err && err != -EPERM)
593 dev_err(&port->dev, "resubmit read urb failed."
594 "(%d)\n", err);
595 }
596 }
597
598 static void sierra_instat_callback(struct urb *urb)
599 {
600 int err;
601 int status = urb->status;
602 struct usb_serial_port *port = urb->context;
603 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
604 struct usb_serial *serial = port->serial;
605
606 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
607 urb, port, portdata);
608
609 if (status == 0) {
610 struct usb_ctrlrequest *req_pkt =
611 (struct usb_ctrlrequest *)urb->transfer_buffer;
612
613 if (!req_pkt) {
614 dev_dbg(&port->dev, "%s: NULL req_pkt\n",
615 __func__);
616 return;
617 }
618 if ((req_pkt->bRequestType == 0xA1) &&
619 (req_pkt->bRequest == 0x20)) {
620 int old_dcd_state;
621 unsigned char signals = *((unsigned char *)
622 urb->transfer_buffer +
623 sizeof(struct usb_ctrlrequest));
624
625 dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
626 signals);
627
628 old_dcd_state = portdata->dcd_state;
629 portdata->cts_state = 1;
630 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
631 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
632 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
633
634 if (old_dcd_state && !portdata->dcd_state)
635 tty_port_tty_hangup(&port->port, true);
636 } else {
637 dev_dbg(&port->dev, "%s: type %x req %x\n",
638 __func__, req_pkt->bRequestType,
639 req_pkt->bRequest);
640 }
641 } else
642 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
643
644 /* Resubmit urb so we continue receiving IRQ data */
645 if (status != -ESHUTDOWN && status != -ENOENT) {
646 usb_mark_last_busy(serial->dev);
647 err = usb_submit_urb(urb, GFP_ATOMIC);
648 if (err && err != -EPERM)
649 dev_err(&port->dev, "%s: resubmit intr urb "
650 "failed. (%d)\n", __func__, err);
651 }
652 }
653
654 static int sierra_write_room(struct tty_struct *tty)
655 {
656 struct usb_serial_port *port = tty->driver_data;
657 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
658 unsigned long flags;
659
660 /* try to give a good number back based on if we have any free urbs at
661 * this point in time */
662 spin_lock_irqsave(&portdata->lock, flags);
663 if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) {
664 spin_unlock_irqrestore(&portdata->lock, flags);
665 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
666 return 0;
667 }
668 spin_unlock_irqrestore(&portdata->lock, flags);
669
670 return 2048;
671 }
672
673 static int sierra_chars_in_buffer(struct tty_struct *tty)
674 {
675 struct usb_serial_port *port = tty->driver_data;
676 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
677 unsigned long flags;
678 int chars;
679
680 /* NOTE: This overcounts somewhat. */
681 spin_lock_irqsave(&portdata->lock, flags);
682 chars = portdata->outstanding_urbs * MAX_TRANSFER;
683 spin_unlock_irqrestore(&portdata->lock, flags);
684
685 dev_dbg(&port->dev, "%s - %d\n", __func__, chars);
686
687 return chars;
688 }
689
690 static void sierra_stop_rx_urbs(struct usb_serial_port *port)
691 {
692 int i;
693 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
694
695 for (i = 0; i < portdata->num_in_urbs; i++)
696 usb_kill_urb(portdata->in_urbs[i]);
697
698 usb_kill_urb(port->interrupt_in_urb);
699 }
700
701 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
702 {
703 int ok_cnt;
704 int err = -EINVAL;
705 int i;
706 struct urb *urb;
707 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
708
709 ok_cnt = 0;
710 for (i = 0; i < portdata->num_in_urbs; i++) {
711 urb = portdata->in_urbs[i];
712 if (!urb)
713 continue;
714 err = usb_submit_urb(urb, mem_flags);
715 if (err) {
716 dev_err(&port->dev, "%s: submit urb failed: %d\n",
717 __func__, err);
718 } else {
719 ok_cnt++;
720 }
721 }
722
723 if (ok_cnt && port->interrupt_in_urb) {
724 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
725 if (err) {
726 dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
727 __func__, err);
728 }
729 }
730
731 if (ok_cnt > 0) /* at least one rx urb submitted */
732 return 0;
733 else
734 return err;
735 }
736
737 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
738 int dir, void *ctx, int len,
739 gfp_t mem_flags,
740 usb_complete_t callback)
741 {
742 struct urb *urb;
743 u8 *buf;
744
745 urb = usb_alloc_urb(0, mem_flags);
746 if (!urb)
747 return NULL;
748
749 buf = kmalloc(len, mem_flags);
750 if (buf) {
751 /* Fill URB using supplied data */
752 usb_fill_bulk_urb(urb, serial->dev,
753 usb_sndbulkpipe(serial->dev, endpoint) | dir,
754 buf, len, callback, ctx);
755
756 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
757 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
758 } else {
759 sierra_release_urb(urb);
760 urb = NULL;
761 }
762
763 return urb;
764 }
765
766 static void sierra_close(struct usb_serial_port *port)
767 {
768 int i;
769 struct usb_serial *serial = port->serial;
770 struct sierra_port_private *portdata;
771 struct sierra_intf_private *intfdata = usb_get_serial_data(serial);
772 struct urb *urb;
773
774 portdata = usb_get_serial_port_data(port);
775
776 /*
777 * Need to take susp_lock to make sure port is not already being
778 * resumed, but no need to hold it due to ASYNC_INITIALIZED.
779 */
780 spin_lock_irq(&intfdata->susp_lock);
781 if (--intfdata->open_ports == 0)
782 serial->interface->needs_remote_wakeup = 0;
783 spin_unlock_irq(&intfdata->susp_lock);
784
785 for (;;) {
786 urb = usb_get_from_anchor(&portdata->delayed);
787 if (!urb)
788 break;
789 kfree(urb->transfer_buffer);
790 usb_free_urb(urb);
791 usb_autopm_put_interface_async(serial->interface);
792 spin_lock(&portdata->lock);
793 portdata->outstanding_urbs--;
794 spin_unlock(&portdata->lock);
795 }
796
797 sierra_stop_rx_urbs(port);
798 usb_kill_anchored_urbs(&portdata->active);
799
800 for (i = 0; i < portdata->num_in_urbs; i++) {
801 sierra_release_urb(portdata->in_urbs[i]);
802 portdata->in_urbs[i] = NULL;
803 }
804
805 usb_autopm_get_interface_no_resume(serial->interface);
806 }
807
808 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
809 {
810 struct sierra_port_private *portdata;
811 struct usb_serial *serial = port->serial;
812 struct sierra_intf_private *intfdata = usb_get_serial_data(serial);
813 int i;
814 int err;
815 int endpoint;
816 struct urb *urb;
817
818 portdata = usb_get_serial_port_data(port);
819
820 endpoint = port->bulk_in_endpointAddress;
821 for (i = 0; i < portdata->num_in_urbs; i++) {
822 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
823 IN_BUFLEN, GFP_KERNEL,
824 sierra_indat_callback);
825 portdata->in_urbs[i] = urb;
826 }
827 /* clear halt condition */
828 usb_clear_halt(serial->dev,
829 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
830
831 err = sierra_submit_rx_urbs(port, GFP_KERNEL);
832 if (err)
833 goto err_submit;
834
835 spin_lock_irq(&intfdata->susp_lock);
836 if (++intfdata->open_ports == 1)
837 serial->interface->needs_remote_wakeup = 1;
838 spin_unlock_irq(&intfdata->susp_lock);
839 usb_autopm_put_interface(serial->interface);
840
841 return 0;
842
843 err_submit:
844 sierra_stop_rx_urbs(port);
845
846 for (i = 0; i < portdata->num_in_urbs; i++) {
847 sierra_release_urb(portdata->in_urbs[i]);
848 portdata->in_urbs[i] = NULL;
849 }
850
851 return err;
852 }
853
854
855 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
856 {
857 struct sierra_port_private *portdata;
858
859 portdata = usb_get_serial_port_data(port);
860 portdata->rts_state = on;
861 portdata->dtr_state = on;
862
863 sierra_send_setup(port);
864 }
865
866 static int sierra_startup(struct usb_serial *serial)
867 {
868 struct sierra_intf_private *intfdata;
869
870 intfdata = kzalloc(sizeof(*intfdata), GFP_KERNEL);
871 if (!intfdata)
872 return -ENOMEM;
873
874 spin_lock_init(&intfdata->susp_lock);
875
876 usb_set_serial_data(serial, intfdata);
877
878 /* Set Device mode to D0 */
879 sierra_set_power_state(serial->dev, 0x0000);
880
881 /* Check NMEA and set */
882 if (nmea)
883 sierra_vsc_set_nmea(serial->dev, 1);
884
885 return 0;
886 }
887
888 static void sierra_release(struct usb_serial *serial)
889 {
890 struct sierra_intf_private *intfdata;
891
892 intfdata = usb_get_serial_data(serial);
893 kfree(intfdata);
894 }
895
896 static int sierra_port_probe(struct usb_serial_port *port)
897 {
898 struct usb_serial *serial = port->serial;
899 struct sierra_port_private *portdata;
900 const struct sierra_iface_info *himemoryp;
901 u8 ifnum;
902
903 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
904 if (!portdata)
905 return -ENOMEM;
906
907 spin_lock_init(&portdata->lock);
908 init_usb_anchor(&portdata->active);
909 init_usb_anchor(&portdata->delayed);
910
911 /* Assume low memory requirements */
912 portdata->num_out_urbs = N_OUT_URB;
913 portdata->num_in_urbs = N_IN_URB;
914
915 /* Determine actual memory requirements */
916 if (serial->num_ports == 1) {
917 /* Get interface number for composite device */
918 ifnum = sierra_calc_interface(serial);
919 himemoryp = &typeB_interface_list;
920 } else {
921 /* This is really the usb-serial port number of the interface
922 * rather than the interface number.
923 */
924 ifnum = port->port_number;
925 himemoryp = &typeA_interface_list;
926 }
927
928 if (is_himemory(ifnum, himemoryp)) {
929 portdata->num_out_urbs = N_OUT_URB_HM;
930 portdata->num_in_urbs = N_IN_URB_HM;
931 }
932
933 dev_dbg(&port->dev,
934 "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
935 ifnum, portdata->num_in_urbs, portdata->num_out_urbs);
936
937 usb_set_serial_port_data(port, portdata);
938
939 return 0;
940 }
941
942 static int sierra_port_remove(struct usb_serial_port *port)
943 {
944 struct sierra_port_private *portdata;
945
946 portdata = usb_get_serial_port_data(port);
947 usb_set_serial_port_data(port, NULL);
948 kfree(portdata);
949
950 return 0;
951 }
952
953 #ifdef CONFIG_PM
954 static void stop_read_write_urbs(struct usb_serial *serial)
955 {
956 int i;
957 struct usb_serial_port *port;
958 struct sierra_port_private *portdata;
959
960 /* Stop reading/writing urbs */
961 for (i = 0; i < serial->num_ports; ++i) {
962 port = serial->port[i];
963 portdata = usb_get_serial_port_data(port);
964 if (!portdata)
965 continue;
966 sierra_stop_rx_urbs(port);
967 usb_kill_anchored_urbs(&portdata->active);
968 }
969 }
970
971 static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
972 {
973 struct sierra_intf_private *intfdata = usb_get_serial_data(serial);
974
975 spin_lock_irq(&intfdata->susp_lock);
976 if (PMSG_IS_AUTO(message)) {
977 if (intfdata->in_flight) {
978 spin_unlock_irq(&intfdata->susp_lock);
979 return -EBUSY;
980 }
981 }
982 intfdata->suspended = 1;
983 spin_unlock_irq(&intfdata->susp_lock);
984
985 stop_read_write_urbs(serial);
986
987 return 0;
988 }
989
990 /* Caller must hold susp_lock. */
991 static int sierra_submit_delayed_urbs(struct usb_serial_port *port)
992 {
993 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
994 struct sierra_intf_private *intfdata;
995 struct urb *urb;
996 int ec = 0;
997 int err;
998
999 intfdata = usb_get_serial_data(port->serial);
1000
1001 for (;;) {
1002 urb = usb_get_from_anchor(&portdata->delayed);
1003 if (!urb)
1004 break;
1005
1006 usb_anchor_urb(urb, &portdata->active);
1007 intfdata->in_flight++;
1008 err = usb_submit_urb(urb, GFP_ATOMIC);
1009 if (err) {
1010 dev_err(&port->dev, "%s - submit urb failed: %d",
1011 __func__, err);
1012 ec++;
1013 intfdata->in_flight--;
1014 usb_unanchor_urb(urb);
1015 kfree(urb->transfer_buffer);
1016 usb_free_urb(urb);
1017
1018 spin_lock(&portdata->lock);
1019 portdata->outstanding_urbs--;
1020 spin_unlock(&portdata->lock);
1021 }
1022 }
1023
1024 if (ec)
1025 return -EIO;
1026
1027 return 0;
1028 }
1029
1030 static int sierra_resume(struct usb_serial *serial)
1031 {
1032 struct usb_serial_port *port;
1033 struct sierra_intf_private *intfdata = usb_get_serial_data(serial);
1034 int ec = 0;
1035 int i, err;
1036
1037 spin_lock_irq(&intfdata->susp_lock);
1038 for (i = 0; i < serial->num_ports; i++) {
1039 port = serial->port[i];
1040
1041 if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags))
1042 continue;
1043
1044 err = sierra_submit_delayed_urbs(port);
1045 if (err)
1046 ec++;
1047
1048 err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
1049 if (err)
1050 ec++;
1051 }
1052 intfdata->suspended = 0;
1053 spin_unlock_irq(&intfdata->susp_lock);
1054
1055 return ec ? -EIO : 0;
1056 }
1057
1058 #else
1059 #define sierra_suspend NULL
1060 #define sierra_resume NULL
1061 #endif
1062
1063 static struct usb_serial_driver sierra_device = {
1064 .driver = {
1065 .owner = THIS_MODULE,
1066 .name = "sierra",
1067 },
1068 .description = "Sierra USB modem",
1069 .id_table = id_table,
1070 .calc_num_ports = sierra_calc_num_ports,
1071 .probe = sierra_probe,
1072 .open = sierra_open,
1073 .close = sierra_close,
1074 .dtr_rts = sierra_dtr_rts,
1075 .write = sierra_write,
1076 .write_room = sierra_write_room,
1077 .chars_in_buffer = sierra_chars_in_buffer,
1078 .tiocmget = sierra_tiocmget,
1079 .tiocmset = sierra_tiocmset,
1080 .attach = sierra_startup,
1081 .release = sierra_release,
1082 .port_probe = sierra_port_probe,
1083 .port_remove = sierra_port_remove,
1084 .suspend = sierra_suspend,
1085 .resume = sierra_resume,
1086 .read_int_callback = sierra_instat_callback,
1087 };
1088
1089 static struct usb_serial_driver * const serial_drivers[] = {
1090 &sierra_device, NULL
1091 };
1092
1093 module_usb_serial_driver(serial_drivers, id_table);
1094
1095 MODULE_AUTHOR(DRIVER_AUTHOR);
1096 MODULE_DESCRIPTION(DRIVER_DESC);
1097 MODULE_LICENSE("GPL");
1098
1099 module_param(nmea, bool, S_IRUGO | S_IWUSR);
1100 MODULE_PARM_DESC(nmea, "NMEA streaming");
Linux kernel - Deliverables
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