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Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[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 };
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 u8 ifnum;
165
166 udev = serial->dev;
167 ifnum = sierra_calc_interface(serial);
168
169 /*
170 * If this interface supports more than 1 alternate
171 * select the 2nd one
172 */
173 if (serial->interface->num_altsetting == 2) {
174 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
175 ifnum);
176 /* We know the alternate setting is 1 for the MC8785 */
177 usb_set_interface(udev, ifnum, 1);
178 }
179
180 /* ifnum could have changed - by calling usb_set_interface */
181 ifnum = sierra_calc_interface(serial);
182
183 if (is_blacklisted(ifnum,
184 (struct sierra_iface_info *)id->driver_info)) {
185 dev_dbg(&serial->dev->dev,
186 "Ignoring blacklisted interface #%d\n", ifnum);
187 return -ENODEV;
188 }
189
190 return result;
191 }
192
193 /* interfaces with higher memory requirements */
194 static const u8 hi_memory_typeA_ifaces[] = { 0, 2 };
195 static const struct sierra_iface_info typeA_interface_list = {
196 .infolen = ARRAY_SIZE(hi_memory_typeA_ifaces),
197 .ifaceinfo = hi_memory_typeA_ifaces,
198 };
199
200 static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 };
201 static const struct sierra_iface_info typeB_interface_list = {
202 .infolen = ARRAY_SIZE(hi_memory_typeB_ifaces),
203 .ifaceinfo = hi_memory_typeB_ifaces,
204 };
205
206 /* 'blacklist' of interfaces not served by this driver */
207 static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11, 19, 20 };
208 static const struct sierra_iface_info direct_ip_interface_blacklist = {
209 .infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces),
210 .ifaceinfo = direct_ip_non_serial_ifaces,
211 };
212
213 static const struct usb_device_id id_table[] = {
214 { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
215 { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */
216 { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */
217 { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */
218
219 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
220 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
221 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
222 { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
223 { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
224 { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */
225 { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
226 { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */
227 { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
228 { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
229 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
230 { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
231 { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U */
232 /* Sierra Wireless C597 */
233 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
234 /* Sierra Wireless T598 */
235 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
236 { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */
237 { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */
238 { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */
239 { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */
240
241 { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
242 { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
243 { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
244 { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */
245 { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */
246 { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */
247 { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
248 { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */
249 { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
250 { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */
251 { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
252 { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
253 { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */
254 { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
255 { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
256 { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */
257 { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */
258 { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */
259 { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */
260 { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
261 { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
262 /* Sierra Wireless MC8790, MC8791, MC8792 Composite */
263 { USB_DEVICE(0x1199, 0x683C) },
264 { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
265 /* Sierra Wireless MC8790, MC8791, MC8792 */
266 { USB_DEVICE(0x1199, 0x683E) },
267 { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
268 { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
269 { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
270 { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
271 { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
272 { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
273 { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
274 { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
275 /* Sierra Wireless C885 */
276 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
277 /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */
278 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
279 /* Sierra Wireless C22/C33 */
280 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
281 /* Sierra Wireless HSPA Non-Composite Device */
282 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
283 { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */
284 { USB_DEVICE(0x1199, 0x68A3), /* Sierra Wireless Direct IP modems */
285 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
286 },
287 /* AT&T Direct IP LTE modems */
288 { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68AA, 0xFF, 0xFF, 0xFF),
289 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
290 },
291 { USB_DEVICE(0x0f3d, 0x68A3), /* Airprime/Sierra Wireless Direct IP modems */
292 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
293 },
294 { USB_DEVICE(0x413C, 0x08133) }, /* Dell Computer Corp. Wireless 5720 VZW Mobile Broadband (EVDO Rev-A) Minicard GPS Port */
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 dev_err(&port->dev, "out of memory\n");
501 retval = -ENOMEM;
502 goto error_no_buffer;
503 }
504
505 urb = usb_alloc_urb(0, GFP_ATOMIC);
506 if (!urb) {
507 dev_err(&port->dev, "no more free urbs\n");
508 retval = -ENOMEM;
509 goto error_no_urb;
510 }
511
512 memcpy(buffer, buf, writesize);
513
514 usb_serial_debug_data(&port->dev, __func__, writesize, buffer);
515
516 usb_fill_bulk_urb(urb, serial->dev,
517 usb_sndbulkpipe(serial->dev,
518 port->bulk_out_endpointAddress),
519 buffer, writesize, sierra_outdat_callback, port);
520
521 /* Handle the need to send a zero length packet */
522 urb->transfer_flags |= URB_ZERO_PACKET;
523
524 spin_lock_irqsave(&intfdata->susp_lock, flags);
525
526 if (intfdata->suspended) {
527 usb_anchor_urb(urb, &portdata->delayed);
528 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
529 goto skip_power;
530 } else {
531 usb_anchor_urb(urb, &portdata->active);
532 }
533 /* send it down the pipe */
534 retval = usb_submit_urb(urb, GFP_ATOMIC);
535 if (retval) {
536 usb_unanchor_urb(urb);
537 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
538 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
539 "with status = %d\n", __func__, retval);
540 goto error;
541 } else {
542 intfdata->in_flight++;
543 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
544 }
545
546 skip_power:
547 /* we are done with this urb, so let the host driver
548 * really free it when it is finished with it */
549 usb_free_urb(urb);
550
551 return writesize;
552 error:
553 usb_free_urb(urb);
554 error_no_urb:
555 kfree(buffer);
556 error_no_buffer:
557 spin_lock_irqsave(&portdata->lock, flags);
558 --portdata->outstanding_urbs;
559 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
560 portdata->outstanding_urbs);
561 spin_unlock_irqrestore(&portdata->lock, flags);
562 usb_autopm_put_interface_async(serial->interface);
563 error_simple:
564 return retval;
565 }
566
567 static void sierra_indat_callback(struct urb *urb)
568 {
569 int err;
570 int endpoint;
571 struct usb_serial_port *port;
572 unsigned char *data = urb->transfer_buffer;
573 int status = urb->status;
574
575 endpoint = usb_pipeendpoint(urb->pipe);
576 port = urb->context;
577
578 if (status) {
579 dev_dbg(&port->dev, "%s: nonzero status: %d on"
580 " endpoint %02x\n", __func__, status, endpoint);
581 } else {
582 if (urb->actual_length) {
583 tty_insert_flip_string(&port->port, data,
584 urb->actual_length);
585 tty_flip_buffer_push(&port->port);
586
587 usb_serial_debug_data(&port->dev, __func__,
588 urb->actual_length, data);
589 } else {
590 dev_dbg(&port->dev, "%s: empty read urb"
591 " received\n", __func__);
592 }
593 }
594
595 /* Resubmit urb so we continue receiving */
596 if (status != -ESHUTDOWN && status != -EPERM) {
597 usb_mark_last_busy(port->serial->dev);
598 err = usb_submit_urb(urb, GFP_ATOMIC);
599 if (err && err != -EPERM)
600 dev_err(&port->dev, "resubmit read urb failed."
601 "(%d)\n", err);
602 }
603 }
604
605 static void sierra_instat_callback(struct urb *urb)
606 {
607 int err;
608 int status = urb->status;
609 struct usb_serial_port *port = urb->context;
610 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
611 struct usb_serial *serial = port->serial;
612
613 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
614 urb, port, portdata);
615
616 if (status == 0) {
617 struct usb_ctrlrequest *req_pkt =
618 (struct usb_ctrlrequest *)urb->transfer_buffer;
619
620 if (!req_pkt) {
621 dev_dbg(&port->dev, "%s: NULL req_pkt\n",
622 __func__);
623 return;
624 }
625 if ((req_pkt->bRequestType == 0xA1) &&
626 (req_pkt->bRequest == 0x20)) {
627 int old_dcd_state;
628 unsigned char signals = *((unsigned char *)
629 urb->transfer_buffer +
630 sizeof(struct usb_ctrlrequest));
631
632 dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
633 signals);
634
635 old_dcd_state = portdata->dcd_state;
636 portdata->cts_state = 1;
637 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
638 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
639 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
640
641 if (old_dcd_state && !portdata->dcd_state)
642 tty_port_tty_hangup(&port->port, true);
643 } else {
644 dev_dbg(&port->dev, "%s: type %x req %x\n",
645 __func__, req_pkt->bRequestType,
646 req_pkt->bRequest);
647 }
648 } else
649 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
650
651 /* Resubmit urb so we continue receiving IRQ data */
652 if (status != -ESHUTDOWN && status != -ENOENT) {
653 usb_mark_last_busy(serial->dev);
654 err = usb_submit_urb(urb, GFP_ATOMIC);
655 if (err && err != -EPERM)
656 dev_err(&port->dev, "%s: resubmit intr urb "
657 "failed. (%d)\n", __func__, err);
658 }
659 }
660
661 static int sierra_write_room(struct tty_struct *tty)
662 {
663 struct usb_serial_port *port = tty->driver_data;
664 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
665 unsigned long flags;
666
667 /* try to give a good number back based on if we have any free urbs at
668 * this point in time */
669 spin_lock_irqsave(&portdata->lock, flags);
670 if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) {
671 spin_unlock_irqrestore(&portdata->lock, flags);
672 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
673 return 0;
674 }
675 spin_unlock_irqrestore(&portdata->lock, flags);
676
677 return 2048;
678 }
679
680 static void sierra_stop_rx_urbs(struct usb_serial_port *port)
681 {
682 int i;
683 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
684
685 for (i = 0; i < portdata->num_in_urbs; i++)
686 usb_kill_urb(portdata->in_urbs[i]);
687
688 usb_kill_urb(port->interrupt_in_urb);
689 }
690
691 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
692 {
693 int ok_cnt;
694 int err = -EINVAL;
695 int i;
696 struct urb *urb;
697 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
698
699 ok_cnt = 0;
700 for (i = 0; i < portdata->num_in_urbs; i++) {
701 urb = portdata->in_urbs[i];
702 if (!urb)
703 continue;
704 err = usb_submit_urb(urb, mem_flags);
705 if (err) {
706 dev_err(&port->dev, "%s: submit urb failed: %d\n",
707 __func__, err);
708 } else {
709 ok_cnt++;
710 }
711 }
712
713 if (ok_cnt && port->interrupt_in_urb) {
714 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
715 if (err) {
716 dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
717 __func__, err);
718 }
719 }
720
721 if (ok_cnt > 0) /* at least one rx urb submitted */
722 return 0;
723 else
724 return err;
725 }
726
727 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
728 int dir, void *ctx, int len,
729 gfp_t mem_flags,
730 usb_complete_t callback)
731 {
732 struct urb *urb;
733 u8 *buf;
734
735 if (endpoint == -1)
736 return NULL;
737
738 urb = usb_alloc_urb(0, mem_flags);
739 if (urb == NULL) {
740 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n",
741 __func__, endpoint);
742 return NULL;
743 }
744
745 buf = kmalloc(len, mem_flags);
746 if (buf) {
747 /* Fill URB using supplied data */
748 usb_fill_bulk_urb(urb, serial->dev,
749 usb_sndbulkpipe(serial->dev, endpoint) | dir,
750 buf, len, callback, ctx);
751
752 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
753 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
754 } else {
755 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__,
756 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
757
758 sierra_release_urb(urb);
759 urb = NULL;
760 }
761
762 return urb;
763 }
764
765 static void sierra_close(struct usb_serial_port *port)
766 {
767 int i;
768 struct usb_serial *serial = port->serial;
769 struct sierra_port_private *portdata;
770 struct sierra_intf_private *intfdata = port->serial->private;
771
772 portdata = usb_get_serial_port_data(port);
773
774 portdata->rts_state = 0;
775 portdata->dtr_state = 0;
776
777 mutex_lock(&serial->disc_mutex);
778 if (!serial->disconnected) {
779 serial->interface->needs_remote_wakeup = 0;
780 /* odd error handling due to pm counters */
781 if (!usb_autopm_get_interface(serial->interface))
782 sierra_send_setup(port);
783 else
784 usb_autopm_get_interface_no_resume(serial->interface);
785
786 }
787 mutex_unlock(&serial->disc_mutex);
788 spin_lock_irq(&intfdata->susp_lock);
789 portdata->opened = 0;
790 spin_unlock_irq(&intfdata->susp_lock);
791
792 sierra_stop_rx_urbs(port);
793 for (i = 0; i < portdata->num_in_urbs; i++) {
794 sierra_release_urb(portdata->in_urbs[i]);
795 portdata->in_urbs[i] = NULL;
796 }
797 }
798
799 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
800 {
801 struct sierra_port_private *portdata;
802 struct usb_serial *serial = port->serial;
803 struct sierra_intf_private *intfdata = serial->private;
804 int i;
805 int err;
806 int endpoint;
807 struct urb *urb;
808
809 portdata = usb_get_serial_port_data(port);
810
811 /* Set some sane defaults */
812 portdata->rts_state = 1;
813 portdata->dtr_state = 1;
814
815
816 endpoint = port->bulk_in_endpointAddress;
817 for (i = 0; i < portdata->num_in_urbs; i++) {
818 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
819 IN_BUFLEN, GFP_KERNEL,
820 sierra_indat_callback);
821 portdata->in_urbs[i] = urb;
822 }
823 /* clear halt condition */
824 usb_clear_halt(serial->dev,
825 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
826
827 err = sierra_submit_rx_urbs(port, GFP_KERNEL);
828 if (err) {
829 /* get rid of everything as in close */
830 sierra_close(port);
831 /* restore balance for autopm */
832 if (!serial->disconnected)
833 usb_autopm_put_interface(serial->interface);
834 return err;
835 }
836 sierra_send_setup(port);
837
838 serial->interface->needs_remote_wakeup = 1;
839 spin_lock_irq(&intfdata->susp_lock);
840 portdata->opened = 1;
841 spin_unlock_irq(&intfdata->susp_lock);
842 usb_autopm_put_interface(serial->interface);
843
844 return 0;
845 }
846
847
848 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
849 {
850 struct sierra_port_private *portdata;
851
852 portdata = usb_get_serial_port_data(port);
853 portdata->rts_state = on;
854 portdata->dtr_state = on;
855
856 sierra_send_setup(port);
857 }
858
859 static int sierra_startup(struct usb_serial *serial)
860 {
861 struct sierra_intf_private *intfdata;
862
863 intfdata = kzalloc(sizeof(*intfdata), GFP_KERNEL);
864 if (!intfdata)
865 return -ENOMEM;
866
867 spin_lock_init(&intfdata->susp_lock);
868
869 usb_set_serial_data(serial, intfdata);
870
871 /* Set Device mode to D0 */
872 sierra_set_power_state(serial->dev, 0x0000);
873
874 /* Check NMEA and set */
875 if (nmea)
876 sierra_vsc_set_nmea(serial->dev, 1);
877
878 return 0;
879 }
880
881 static void sierra_release(struct usb_serial *serial)
882 {
883 struct sierra_intf_private *intfdata;
884
885 intfdata = usb_get_serial_data(serial);
886 kfree(intfdata);
887 }
888
889 static int sierra_port_probe(struct usb_serial_port *port)
890 {
891 struct usb_serial *serial = port->serial;
892 struct sierra_port_private *portdata;
893 const struct sierra_iface_info *himemoryp;
894 u8 ifnum;
895
896 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
897 if (!portdata)
898 return -ENOMEM;
899
900 spin_lock_init(&portdata->lock);
901 init_usb_anchor(&portdata->active);
902 init_usb_anchor(&portdata->delayed);
903
904 /* Assume low memory requirements */
905 portdata->num_out_urbs = N_OUT_URB;
906 portdata->num_in_urbs = N_IN_URB;
907
908 /* Determine actual memory requirements */
909 if (serial->num_ports == 1) {
910 /* Get interface number for composite device */
911 ifnum = sierra_calc_interface(serial);
912 himemoryp = &typeB_interface_list;
913 } else {
914 /* This is really the usb-serial port number of the interface
915 * rather than the interface number.
916 */
917 ifnum = port->port_number;
918 himemoryp = &typeA_interface_list;
919 }
920
921 if (is_himemory(ifnum, himemoryp)) {
922 portdata->num_out_urbs = N_OUT_URB_HM;
923 portdata->num_in_urbs = N_IN_URB_HM;
924 }
925
926 dev_dbg(&port->dev,
927 "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
928 ifnum, portdata->num_in_urbs, portdata->num_out_urbs);
929
930 usb_set_serial_port_data(port, portdata);
931
932 return 0;
933 }
934
935 static int sierra_port_remove(struct usb_serial_port *port)
936 {
937 struct sierra_port_private *portdata;
938
939 portdata = usb_get_serial_port_data(port);
940 kfree(portdata);
941
942 return 0;
943 }
944
945 #ifdef CONFIG_PM
946 static void stop_read_write_urbs(struct usb_serial *serial)
947 {
948 int i;
949 struct usb_serial_port *port;
950 struct sierra_port_private *portdata;
951
952 /* Stop reading/writing urbs */
953 for (i = 0; i < serial->num_ports; ++i) {
954 port = serial->port[i];
955 portdata = usb_get_serial_port_data(port);
956 sierra_stop_rx_urbs(port);
957 usb_kill_anchored_urbs(&portdata->active);
958 }
959 }
960
961 static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
962 {
963 struct sierra_intf_private *intfdata;
964 int b;
965
966 if (PMSG_IS_AUTO(message)) {
967 intfdata = serial->private;
968 spin_lock_irq(&intfdata->susp_lock);
969 b = intfdata->in_flight;
970
971 if (b) {
972 spin_unlock_irq(&intfdata->susp_lock);
973 return -EBUSY;
974 } else {
975 intfdata->suspended = 1;
976 spin_unlock_irq(&intfdata->susp_lock);
977 }
978 }
979 stop_read_write_urbs(serial);
980
981 return 0;
982 }
983
984 static int sierra_resume(struct usb_serial *serial)
985 {
986 struct usb_serial_port *port;
987 struct sierra_intf_private *intfdata = serial->private;
988 struct sierra_port_private *portdata;
989 struct urb *urb;
990 int ec = 0;
991 int i, err;
992
993 spin_lock_irq(&intfdata->susp_lock);
994 for (i = 0; i < serial->num_ports; i++) {
995 port = serial->port[i];
996 portdata = usb_get_serial_port_data(port);
997
998 while ((urb = usb_get_from_anchor(&portdata->delayed))) {
999 usb_anchor_urb(urb, &portdata->active);
1000 intfdata->in_flight++;
1001 err = usb_submit_urb(urb, GFP_ATOMIC);
1002 if (err < 0) {
1003 intfdata->in_flight--;
1004 usb_unanchor_urb(urb);
1005 usb_scuttle_anchored_urbs(&portdata->delayed);
1006 break;
1007 }
1008 }
1009
1010 if (portdata->opened) {
1011 err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
1012 if (err)
1013 ec++;
1014 }
1015 }
1016 intfdata->suspended = 0;
1017 spin_unlock_irq(&intfdata->susp_lock);
1018
1019 return ec ? -EIO : 0;
1020 }
1021
1022 #else
1023 #define sierra_suspend NULL
1024 #define sierra_resume NULL
1025 #endif
1026
1027 static struct usb_serial_driver sierra_device = {
1028 .driver = {
1029 .owner = THIS_MODULE,
1030 .name = "sierra",
1031 },
1032 .description = "Sierra USB modem",
1033 .id_table = id_table,
1034 .calc_num_ports = sierra_calc_num_ports,
1035 .probe = sierra_probe,
1036 .open = sierra_open,
1037 .close = sierra_close,
1038 .dtr_rts = sierra_dtr_rts,
1039 .write = sierra_write,
1040 .write_room = sierra_write_room,
1041 .set_termios = sierra_set_termios,
1042 .tiocmget = sierra_tiocmget,
1043 .tiocmset = sierra_tiocmset,
1044 .attach = sierra_startup,
1045 .release = sierra_release,
1046 .port_probe = sierra_port_probe,
1047 .port_remove = sierra_port_remove,
1048 .suspend = sierra_suspend,
1049 .resume = sierra_resume,
1050 .read_int_callback = sierra_instat_callback,
1051 };
1052
1053 static struct usb_serial_driver * const serial_drivers[] = {
1054 &sierra_device, NULL
1055 };
1056
1057 module_usb_serial_driver(serial_drivers, id_table);
1058
1059 MODULE_AUTHOR(DRIVER_AUTHOR);
1060 MODULE_DESCRIPTION(DRIVER_DESC);
1061 MODULE_LICENSE("GPL");
1062
1063 module_param(nmea, bool, S_IRUGO | S_IWUSR);
1064 MODULE_PARM_DESC(nmea, "NMEA streaming");
Linux kernel - Deliverables
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