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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
[mirror_ubuntu-bionic-kernel.git] / drivers / usb / serial / sierra.c
1 /*
2 USB Driver for Sierra Wireless
3
4 Copyright (C) 2006, 2007, 2008 Kevin Lloyd <klloyd@sierrawireless.com>,
5
6 Copyright (C) 2008, 2009 Elina Pasheva, Matthew Safar, Rory Filer
7 <linux@sierrawireless.com>
8
9 IMPORTANT DISCLAIMER: This driver is not commercially supported by
10 Sierra Wireless. Use at your own risk.
11
12 This driver is free software; you can redistribute it and/or modify
13 it under the terms of Version 2 of the GNU General Public License as
14 published by the Free Software Foundation.
15
16 Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de>
17 Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
18 */
19 /* Uncomment to log function calls */
20 /* #define DEBUG */
21 #define DRIVER_VERSION "v.1.7.16"
22 #define DRIVER_AUTHOR "Kevin Lloyd, Elina Pasheva, Matthew Safar, Rory Filer"
23 #define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
24
25 #include <linux/kernel.h>
26 #include <linux/jiffies.h>
27 #include <linux/errno.h>
28 #include <linux/tty.h>
29 #include <linux/slab.h>
30 #include <linux/tty_flip.h>
31 #include <linux/module.h>
32 #include <linux/usb.h>
33 #include <linux/usb/serial.h>
34
35 #define SWIMS_USB_REQUEST_SetPower 0x00
36 #define SWIMS_USB_REQUEST_SetNmea 0x07
37
38 #define N_IN_URB_HM 8
39 #define N_OUT_URB_HM 64
40 #define N_IN_URB 4
41 #define N_OUT_URB 4
42 #define IN_BUFLEN 4096
43
44 #define MAX_TRANSFER (PAGE_SIZE - 512)
45 /* MAX_TRANSFER is chosen so that the VM is not stressed by
46 allocations > PAGE_SIZE and the number of packets in a page
47 is an integer 512 is the largest possible packet on EHCI */
48
49 static int debug;
50 static int nmea;
51
52 /* Used in interface blacklisting */
53 struct sierra_iface_info {
54 const u32 infolen; /* number of interface numbers on blacklist */
55 const u8 *ifaceinfo; /* pointer to the array holding the numbers */
56 };
57
58 struct sierra_intf_private {
59 spinlock_t susp_lock;
60 unsigned int suspended:1;
61 int in_flight;
62 };
63
64 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
65 {
66 int result;
67 dev_dbg(&udev->dev, "%s\n", __func__);
68 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
69 SWIMS_USB_REQUEST_SetPower, /* __u8 request */
70 USB_TYPE_VENDOR, /* __u8 request type */
71 swiState, /* __u16 value */
72 0, /* __u16 index */
73 NULL, /* void *data */
74 0, /* __u16 size */
75 USB_CTRL_SET_TIMEOUT); /* int timeout */
76 return result;
77 }
78
79 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
80 {
81 int result;
82 dev_dbg(&udev->dev, "%s\n", __func__);
83 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
84 SWIMS_USB_REQUEST_SetNmea, /* __u8 request */
85 USB_TYPE_VENDOR, /* __u8 request type */
86 enable, /* __u16 value */
87 0x0000, /* __u16 index */
88 NULL, /* void *data */
89 0, /* __u16 size */
90 USB_CTRL_SET_TIMEOUT); /* int timeout */
91 return result;
92 }
93
94 static int sierra_calc_num_ports(struct usb_serial *serial)
95 {
96 int num_ports = 0;
97 u8 ifnum, numendpoints;
98
99 dev_dbg(&serial->dev->dev, "%s\n", __func__);
100
101 ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
102 numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
103
104 /* Dummy interface present on some SKUs should be ignored */
105 if (ifnum == 0x99)
106 num_ports = 0;
107 else if (numendpoints <= 3)
108 num_ports = 1;
109 else
110 num_ports = (numendpoints-1)/2;
111 return num_ports;
112 }
113
114 static int is_blacklisted(const u8 ifnum,
115 const struct sierra_iface_info *blacklist)
116 {
117 const u8 *info;
118 int i;
119
120 if (blacklist) {
121 info = blacklist->ifaceinfo;
122
123 for (i = 0; i < blacklist->infolen; i++) {
124 if (info[i] == ifnum)
125 return 1;
126 }
127 }
128 return 0;
129 }
130
131 static int is_himemory(const u8 ifnum,
132 const struct sierra_iface_info *himemorylist)
133 {
134 const u8 *info;
135 int i;
136
137 if (himemorylist) {
138 info = himemorylist->ifaceinfo;
139
140 for (i=0; i < himemorylist->infolen; i++) {
141 if (info[i] == ifnum)
142 return 1;
143 }
144 }
145 return 0;
146 }
147
148 static int sierra_calc_interface(struct usb_serial *serial)
149 {
150 int interface;
151 struct usb_interface *p_interface;
152 struct usb_host_interface *p_host_interface;
153 dev_dbg(&serial->dev->dev, "%s\n", __func__);
154
155 /* Get the interface structure pointer from the serial struct */
156 p_interface = serial->interface;
157
158 /* Get a pointer to the host interface structure */
159 p_host_interface = p_interface->cur_altsetting;
160
161 /* read the interface descriptor for this active altsetting
162 * to find out the interface number we are on
163 */
164 interface = p_host_interface->desc.bInterfaceNumber;
165
166 return interface;
167 }
168
169 static int sierra_probe(struct usb_serial *serial,
170 const struct usb_device_id *id)
171 {
172 int result = 0;
173 struct usb_device *udev;
174 struct sierra_intf_private *data;
175 u8 ifnum;
176
177 udev = serial->dev;
178 dev_dbg(&udev->dev, "%s\n", __func__);
179
180 ifnum = sierra_calc_interface(serial);
181 /*
182 * If this interface supports more than 1 alternate
183 * select the 2nd one
184 */
185 if (serial->interface->num_altsetting == 2) {
186 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
187 ifnum);
188 /* We know the alternate setting is 1 for the MC8785 */
189 usb_set_interface(udev, ifnum, 1);
190 }
191
192 /* ifnum could have changed - by calling usb_set_interface */
193 ifnum = sierra_calc_interface(serial);
194
195 if (is_blacklisted(ifnum,
196 (struct sierra_iface_info *)id->driver_info)) {
197 dev_dbg(&serial->dev->dev,
198 "Ignoring blacklisted interface #%d\n", ifnum);
199 return -ENODEV;
200 }
201
202 data = serial->private = kzalloc(sizeof(struct sierra_intf_private), GFP_KERNEL);
203 if (!data)
204 return -ENOMEM;
205 spin_lock_init(&data->susp_lock);
206
207 return result;
208 }
209
210 /* interfaces with higher memory requirements */
211 static const u8 hi_memory_typeA_ifaces[] = { 0, 2 };
212 static const struct sierra_iface_info typeA_interface_list = {
213 .infolen = ARRAY_SIZE(hi_memory_typeA_ifaces),
214 .ifaceinfo = hi_memory_typeA_ifaces,
215 };
216
217 static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 };
218 static const struct sierra_iface_info typeB_interface_list = {
219 .infolen = ARRAY_SIZE(hi_memory_typeB_ifaces),
220 .ifaceinfo = hi_memory_typeB_ifaces,
221 };
222
223 /* 'blacklist' of interfaces not served by this driver */
224 static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11 };
225 static const struct sierra_iface_info direct_ip_interface_blacklist = {
226 .infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces),
227 .ifaceinfo = direct_ip_non_serial_ifaces,
228 };
229
230 static const struct usb_device_id id_table[] = {
231 { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
232 { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */
233 { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */
234 { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */
235
236 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
237 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
238 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
239 { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
240 { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
241 { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */
242 { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
243 { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */
244 { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
245 { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
246 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
247 { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
248 { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U */
249 /* Sierra Wireless C597 */
250 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
251 /* Sierra Wireless T598 */
252 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
253 { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */
254 { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */
255 { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */
256 { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */
257
258 { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
259 { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
260 { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
261 { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */
262 { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */
263 { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */
264 { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
265 { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */
266 { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
267 { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */
268 { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
269 { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
270 { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */
271 { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
272 { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
273 { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */
274 { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */
275 { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */
276 { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */
277 { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
278 { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
279 /* Sierra Wireless MC8790, MC8791, MC8792 Composite */
280 { USB_DEVICE(0x1199, 0x683C) },
281 { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
282 /* Sierra Wireless MC8790, MC8791, MC8792 */
283 { USB_DEVICE(0x1199, 0x683E) },
284 { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
285 { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
286 { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
287 { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
288 { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
289 { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
290 { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
291 { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
292 /* Sierra Wireless C885 */
293 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
294 /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */
295 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
296 /* Sierra Wireless C22/C33 */
297 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
298 /* Sierra Wireless HSPA Non-Composite Device */
299 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
300 { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */
301 { USB_DEVICE(0x1199, 0x68A3), /* Sierra Wireless Direct IP modems */
302 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
303 },
304 { USB_DEVICE(0x413C, 0x08133) }, /* Dell Computer Corp. Wireless 5720 VZW Mobile Broadband (EVDO Rev-A) Minicard GPS Port */
305
306 { }
307 };
308 MODULE_DEVICE_TABLE(usb, id_table);
309
310
311 struct sierra_port_private {
312 spinlock_t lock; /* lock the structure */
313 int outstanding_urbs; /* number of out urbs in flight */
314 struct usb_anchor active;
315 struct usb_anchor delayed;
316
317 int num_out_urbs;
318 int num_in_urbs;
319 /* Input endpoints and buffers for this port */
320 struct urb *in_urbs[N_IN_URB_HM];
321
322 /* Settings for the port */
323 int rts_state; /* Handshaking pins (outputs) */
324 int dtr_state;
325 int cts_state; /* Handshaking pins (inputs) */
326 int dsr_state;
327 int dcd_state;
328 int ri_state;
329 unsigned int opened:1;
330 };
331
332 static int sierra_send_setup(struct usb_serial_port *port)
333 {
334 struct usb_serial *serial = port->serial;
335 struct sierra_port_private *portdata;
336 __u16 interface = 0;
337 int val = 0;
338 int do_send = 0;
339 int retval;
340
341 dev_dbg(&port->dev, "%s\n", __func__);
342
343 portdata = usb_get_serial_port_data(port);
344
345 if (portdata->dtr_state)
346 val |= 0x01;
347 if (portdata->rts_state)
348 val |= 0x02;
349
350 /* If composite device then properly report interface */
351 if (serial->num_ports == 1) {
352 interface = sierra_calc_interface(serial);
353 /* Control message is sent only to interfaces with
354 * interrupt_in endpoints
355 */
356 if (port->interrupt_in_urb) {
357 /* send control message */
358 do_send = 1;
359 }
360 }
361
362 /* Otherwise the need to do non-composite mapping */
363 else {
364 if (port->bulk_out_endpointAddress == 2)
365 interface = 0;
366 else if (port->bulk_out_endpointAddress == 4)
367 interface = 1;
368 else if (port->bulk_out_endpointAddress == 5)
369 interface = 2;
370
371 do_send = 1;
372 }
373 if (!do_send)
374 return 0;
375
376 usb_autopm_get_interface(serial->interface);
377 retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
378 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
379 usb_autopm_put_interface(serial->interface);
380
381 return retval;
382 }
383
384 static void sierra_set_termios(struct tty_struct *tty,
385 struct usb_serial_port *port, struct ktermios *old_termios)
386 {
387 dev_dbg(&port->dev, "%s\n", __func__);
388 tty_termios_copy_hw(tty->termios, old_termios);
389 sierra_send_setup(port);
390 }
391
392 static int sierra_tiocmget(struct tty_struct *tty, struct file *file)
393 {
394 struct usb_serial_port *port = tty->driver_data;
395 unsigned int value;
396 struct sierra_port_private *portdata;
397
398 dev_dbg(&port->dev, "%s\n", __func__);
399 portdata = usb_get_serial_port_data(port);
400
401 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
402 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
403 ((portdata->cts_state) ? TIOCM_CTS : 0) |
404 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
405 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
406 ((portdata->ri_state) ? TIOCM_RNG : 0);
407
408 return value;
409 }
410
411 static int sierra_tiocmset(struct tty_struct *tty, struct file *file,
412 unsigned int set, unsigned int clear)
413 {
414 struct usb_serial_port *port = tty->driver_data;
415 struct sierra_port_private *portdata;
416
417 portdata = usb_get_serial_port_data(port);
418
419 if (set & TIOCM_RTS)
420 portdata->rts_state = 1;
421 if (set & TIOCM_DTR)
422 portdata->dtr_state = 1;
423
424 if (clear & TIOCM_RTS)
425 portdata->rts_state = 0;
426 if (clear & TIOCM_DTR)
427 portdata->dtr_state = 0;
428 return sierra_send_setup(port);
429 }
430
431 static void sierra_release_urb(struct urb *urb)
432 {
433 struct usb_serial_port *port;
434 if (urb) {
435 port = urb->context;
436 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
437 kfree(urb->transfer_buffer);
438 usb_free_urb(urb);
439 }
440 }
441
442 static void sierra_outdat_callback(struct urb *urb)
443 {
444 struct usb_serial_port *port = urb->context;
445 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
446 struct sierra_intf_private *intfdata;
447 int status = urb->status;
448
449 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
450 intfdata = port->serial->private;
451
452 /* free up the transfer buffer, as usb_free_urb() does not do this */
453 kfree(urb->transfer_buffer);
454 usb_autopm_put_interface_async(port->serial->interface);
455 if (status)
456 dev_dbg(&port->dev, "%s - nonzero write bulk status "
457 "received: %d\n", __func__, status);
458
459 spin_lock(&portdata->lock);
460 --portdata->outstanding_urbs;
461 spin_unlock(&portdata->lock);
462 spin_lock(&intfdata->susp_lock);
463 --intfdata->in_flight;
464 spin_unlock(&intfdata->susp_lock);
465
466 usb_serial_port_softint(port);
467 }
468
469 /* Write */
470 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
471 const unsigned char *buf, int count)
472 {
473 struct sierra_port_private *portdata;
474 struct sierra_intf_private *intfdata;
475 struct usb_serial *serial = port->serial;
476 unsigned long flags;
477 unsigned char *buffer;
478 struct urb *urb;
479 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
480 int retval = 0;
481
482 /* verify that we actually have some data to write */
483 if (count == 0)
484 return 0;
485
486 portdata = usb_get_serial_port_data(port);
487 intfdata = serial->private;
488
489 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
490 spin_lock_irqsave(&portdata->lock, flags);
491 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
492 portdata->outstanding_urbs);
493 if (portdata->outstanding_urbs > portdata->num_out_urbs) {
494 spin_unlock_irqrestore(&portdata->lock, flags);
495 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
496 return 0;
497 }
498 portdata->outstanding_urbs++;
499 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
500 portdata->outstanding_urbs);
501 spin_unlock_irqrestore(&portdata->lock, flags);
502
503 retval = usb_autopm_get_interface_async(serial->interface);
504 if (retval < 0) {
505 spin_lock_irqsave(&portdata->lock, flags);
506 portdata->outstanding_urbs--;
507 spin_unlock_irqrestore(&portdata->lock, flags);
508 goto error_simple;
509 }
510
511 buffer = kmalloc(writesize, GFP_ATOMIC);
512 if (!buffer) {
513 dev_err(&port->dev, "out of memory\n");
514 retval = -ENOMEM;
515 goto error_no_buffer;
516 }
517
518 urb = usb_alloc_urb(0, GFP_ATOMIC);
519 if (!urb) {
520 dev_err(&port->dev, "no more free urbs\n");
521 retval = -ENOMEM;
522 goto error_no_urb;
523 }
524
525 memcpy(buffer, buf, writesize);
526
527 usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer);
528
529 usb_fill_bulk_urb(urb, serial->dev,
530 usb_sndbulkpipe(serial->dev,
531 port->bulk_out_endpointAddress),
532 buffer, writesize, sierra_outdat_callback, port);
533
534 /* Handle the need to send a zero length packet */
535 urb->transfer_flags |= URB_ZERO_PACKET;
536
537 spin_lock_irqsave(&intfdata->susp_lock, flags);
538
539 if (intfdata->suspended) {
540 usb_anchor_urb(urb, &portdata->delayed);
541 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
542 goto skip_power;
543 } else {
544 usb_anchor_urb(urb, &portdata->active);
545 }
546 /* send it down the pipe */
547 retval = usb_submit_urb(urb, GFP_ATOMIC);
548 if (retval) {
549 usb_unanchor_urb(urb);
550 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
551 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
552 "with status = %d\n", __func__, retval);
553 goto error;
554 } else {
555 intfdata->in_flight++;
556 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
557 }
558
559 skip_power:
560 /* we are done with this urb, so let the host driver
561 * really free it when it is finished with it */
562 usb_free_urb(urb);
563
564 return writesize;
565 error:
566 usb_free_urb(urb);
567 error_no_urb:
568 kfree(buffer);
569 error_no_buffer:
570 spin_lock_irqsave(&portdata->lock, flags);
571 --portdata->outstanding_urbs;
572 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
573 portdata->outstanding_urbs);
574 spin_unlock_irqrestore(&portdata->lock, flags);
575 usb_autopm_put_interface_async(serial->interface);
576 error_simple:
577 return retval;
578 }
579
580 static void sierra_indat_callback(struct urb *urb)
581 {
582 int err;
583 int endpoint;
584 struct usb_serial_port *port;
585 struct tty_struct *tty;
586 unsigned char *data = urb->transfer_buffer;
587 int status = urb->status;
588
589 endpoint = usb_pipeendpoint(urb->pipe);
590 port = urb->context;
591
592 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
593
594 if (status) {
595 dev_dbg(&port->dev, "%s: nonzero status: %d on"
596 " endpoint %02x\n", __func__, status, endpoint);
597 } else {
598 if (urb->actual_length) {
599 tty = tty_port_tty_get(&port->port);
600 if (tty) {
601 tty_insert_flip_string(tty, data,
602 urb->actual_length);
603 tty_flip_buffer_push(tty);
604
605 tty_kref_put(tty);
606 usb_serial_debug_data(debug, &port->dev,
607 __func__, urb->actual_length, data);
608 }
609 } else {
610 dev_dbg(&port->dev, "%s: empty read urb"
611 " received\n", __func__);
612 }
613 }
614
615 /* Resubmit urb so we continue receiving */
616 if (status != -ESHUTDOWN && status != -EPERM) {
617 usb_mark_last_busy(port->serial->dev);
618 err = usb_submit_urb(urb, GFP_ATOMIC);
619 if (err && err != -EPERM)
620 dev_err(&port->dev, "resubmit read urb failed."
621 "(%d)\n", err);
622 }
623 }
624
625 static void sierra_instat_callback(struct urb *urb)
626 {
627 int err;
628 int status = urb->status;
629 struct usb_serial_port *port = urb->context;
630 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
631 struct usb_serial *serial = port->serial;
632
633 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
634 urb, port, portdata);
635
636 if (status == 0) {
637 struct usb_ctrlrequest *req_pkt =
638 (struct usb_ctrlrequest *)urb->transfer_buffer;
639
640 if (!req_pkt) {
641 dev_dbg(&port->dev, "%s: NULL req_pkt\n",
642 __func__);
643 return;
644 }
645 if ((req_pkt->bRequestType == 0xA1) &&
646 (req_pkt->bRequest == 0x20)) {
647 int old_dcd_state;
648 unsigned char signals = *((unsigned char *)
649 urb->transfer_buffer +
650 sizeof(struct usb_ctrlrequest));
651 struct tty_struct *tty;
652
653 dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
654 signals);
655
656 old_dcd_state = portdata->dcd_state;
657 portdata->cts_state = 1;
658 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
659 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
660 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
661
662 tty = tty_port_tty_get(&port->port);
663 if (tty && !C_CLOCAL(tty) &&
664 old_dcd_state && !portdata->dcd_state)
665 tty_hangup(tty);
666 tty_kref_put(tty);
667 } else {
668 dev_dbg(&port->dev, "%s: type %x req %x\n",
669 __func__, req_pkt->bRequestType,
670 req_pkt->bRequest);
671 }
672 } else
673 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
674
675 /* Resubmit urb so we continue receiving IRQ data */
676 if (status != -ESHUTDOWN && status != -ENOENT) {
677 usb_mark_last_busy(serial->dev);
678 urb->dev = serial->dev;
679 err = usb_submit_urb(urb, GFP_ATOMIC);
680 if (err && err != -EPERM)
681 dev_err(&port->dev, "%s: resubmit intr urb "
682 "failed. (%d)\n", __func__, err);
683 }
684 }
685
686 static int sierra_write_room(struct tty_struct *tty)
687 {
688 struct usb_serial_port *port = tty->driver_data;
689 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
690 unsigned long flags;
691
692 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
693
694 /* try to give a good number back based on if we have any free urbs at
695 * this point in time */
696 spin_lock_irqsave(&portdata->lock, flags);
697 if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) {
698 spin_unlock_irqrestore(&portdata->lock, flags);
699 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
700 return 0;
701 }
702 spin_unlock_irqrestore(&portdata->lock, flags);
703
704 return 2048;
705 }
706
707 static void sierra_stop_rx_urbs(struct usb_serial_port *port)
708 {
709 int i;
710 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
711
712 for (i = 0; i < portdata->num_in_urbs; i++)
713 usb_kill_urb(portdata->in_urbs[i]);
714
715 usb_kill_urb(port->interrupt_in_urb);
716 }
717
718 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
719 {
720 int ok_cnt;
721 int err = -EINVAL;
722 int i;
723 struct urb *urb;
724 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
725
726 ok_cnt = 0;
727 for (i = 0; i < portdata->num_in_urbs; i++) {
728 urb = portdata->in_urbs[i];
729 if (!urb)
730 continue;
731 err = usb_submit_urb(urb, mem_flags);
732 if (err) {
733 dev_err(&port->dev, "%s: submit urb failed: %d\n",
734 __func__, err);
735 } else {
736 ok_cnt++;
737 }
738 }
739
740 if (ok_cnt && port->interrupt_in_urb) {
741 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
742 if (err) {
743 dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
744 __func__, err);
745 }
746 }
747
748 if (ok_cnt > 0) /* at least one rx urb submitted */
749 return 0;
750 else
751 return err;
752 }
753
754 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
755 int dir, void *ctx, int len,
756 gfp_t mem_flags,
757 usb_complete_t callback)
758 {
759 struct urb *urb;
760 u8 *buf;
761
762 if (endpoint == -1)
763 return NULL;
764
765 urb = usb_alloc_urb(0, mem_flags);
766 if (urb == NULL) {
767 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n",
768 __func__, endpoint);
769 return NULL;
770 }
771
772 buf = kmalloc(len, mem_flags);
773 if (buf) {
774 /* Fill URB using supplied data */
775 usb_fill_bulk_urb(urb, serial->dev,
776 usb_sndbulkpipe(serial->dev, endpoint) | dir,
777 buf, len, callback, ctx);
778
779 /* debug */
780 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
781 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
782 } else {
783 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__,
784 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
785
786 sierra_release_urb(urb);
787 urb = NULL;
788 }
789
790 return urb;
791 }
792
793 static void sierra_close(struct usb_serial_port *port)
794 {
795 int i;
796 struct usb_serial *serial = port->serial;
797 struct sierra_port_private *portdata;
798 struct sierra_intf_private *intfdata = port->serial->private;
799
800
801 dev_dbg(&port->dev, "%s\n", __func__);
802 portdata = usb_get_serial_port_data(port);
803
804 portdata->rts_state = 0;
805 portdata->dtr_state = 0;
806
807 if (serial->dev) {
808 mutex_lock(&serial->disc_mutex);
809 if (!serial->disconnected) {
810 serial->interface->needs_remote_wakeup = 0;
811 usb_autopm_get_interface(serial->interface);
812 sierra_send_setup(port);
813 }
814 mutex_unlock(&serial->disc_mutex);
815 spin_lock_irq(&intfdata->susp_lock);
816 portdata->opened = 0;
817 spin_unlock_irq(&intfdata->susp_lock);
818
819
820 /* Stop reading urbs */
821 sierra_stop_rx_urbs(port);
822 /* .. and release them */
823 for (i = 0; i < portdata->num_in_urbs; i++) {
824 sierra_release_urb(portdata->in_urbs[i]);
825 portdata->in_urbs[i] = NULL;
826 }
827 }
828 }
829
830 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
831 {
832 struct sierra_port_private *portdata;
833 struct usb_serial *serial = port->serial;
834 struct sierra_intf_private *intfdata = serial->private;
835 int i;
836 int err;
837 int endpoint;
838 struct urb *urb;
839
840 portdata = usb_get_serial_port_data(port);
841
842 dev_dbg(&port->dev, "%s\n", __func__);
843
844 /* Set some sane defaults */
845 portdata->rts_state = 1;
846 portdata->dtr_state = 1;
847
848
849 endpoint = port->bulk_in_endpointAddress;
850 for (i = 0; i < portdata->num_in_urbs; i++) {
851 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
852 IN_BUFLEN, GFP_KERNEL,
853 sierra_indat_callback);
854 portdata->in_urbs[i] = urb;
855 }
856 /* clear halt condition */
857 usb_clear_halt(serial->dev,
858 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
859
860 err = sierra_submit_rx_urbs(port, GFP_KERNEL);
861 if (err) {
862 /* get rid of everything as in close */
863 sierra_close(port);
864 /* restore balance for autopm */
865 usb_autopm_put_interface(serial->interface);
866 return err;
867 }
868 sierra_send_setup(port);
869
870 serial->interface->needs_remote_wakeup = 1;
871 spin_lock_irq(&intfdata->susp_lock);
872 portdata->opened = 1;
873 spin_unlock_irq(&intfdata->susp_lock);
874 usb_autopm_put_interface(serial->interface);
875
876 return 0;
877 }
878
879
880 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
881 {
882 struct usb_serial *serial = port->serial;
883 struct sierra_port_private *portdata;
884
885 portdata = usb_get_serial_port_data(port);
886 portdata->rts_state = on;
887 portdata->dtr_state = on;
888
889 if (serial->dev) {
890 mutex_lock(&serial->disc_mutex);
891 if (!serial->disconnected)
892 sierra_send_setup(port);
893 mutex_unlock(&serial->disc_mutex);
894 }
895 }
896
897 static int sierra_startup(struct usb_serial *serial)
898 {
899 struct usb_serial_port *port;
900 struct sierra_port_private *portdata;
901 struct sierra_iface_info *himemoryp = NULL;
902 int i;
903 u8 ifnum;
904
905 dev_dbg(&serial->dev->dev, "%s\n", __func__);
906
907 /* Set Device mode to D0 */
908 sierra_set_power_state(serial->dev, 0x0000);
909
910 /* Check NMEA and set */
911 if (nmea)
912 sierra_vsc_set_nmea(serial->dev, 1);
913
914 /* Now setup per port private data */
915 for (i = 0; i < serial->num_ports; i++) {
916 port = serial->port[i];
917 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
918 if (!portdata) {
919 dev_dbg(&port->dev, "%s: kmalloc for "
920 "sierra_port_private (%d) failed!\n",
921 __func__, i);
922 return -ENOMEM;
923 }
924 spin_lock_init(&portdata->lock);
925 init_usb_anchor(&portdata->active);
926 init_usb_anchor(&portdata->delayed);
927 ifnum = i;
928 /* Assume low memory requirements */
929 portdata->num_out_urbs = N_OUT_URB;
930 portdata->num_in_urbs = N_IN_URB;
931
932 /* Determine actual memory requirements */
933 if (serial->num_ports == 1) {
934 /* Get interface number for composite device */
935 ifnum = sierra_calc_interface(serial);
936 himemoryp =
937 (struct sierra_iface_info *)&typeB_interface_list;
938 if (is_himemory(ifnum, himemoryp)) {
939 portdata->num_out_urbs = N_OUT_URB_HM;
940 portdata->num_in_urbs = N_IN_URB_HM;
941 }
942 }
943 else {
944 himemoryp =
945 (struct sierra_iface_info *)&typeA_interface_list;
946 if (is_himemory(i, himemoryp)) {
947 portdata->num_out_urbs = N_OUT_URB_HM;
948 portdata->num_in_urbs = N_IN_URB_HM;
949 }
950 }
951 dev_dbg(&serial->dev->dev,
952 "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
953 ifnum,portdata->num_in_urbs, portdata->num_out_urbs );
954 /* Set the port private data pointer */
955 usb_set_serial_port_data(port, portdata);
956 }
957
958 return 0;
959 }
960
961 static void sierra_release(struct usb_serial *serial)
962 {
963 int i;
964 struct usb_serial_port *port;
965 struct sierra_port_private *portdata;
966
967 dev_dbg(&serial->dev->dev, "%s\n", __func__);
968
969 for (i = 0; i < serial->num_ports; ++i) {
970 port = serial->port[i];
971 if (!port)
972 continue;
973 portdata = usb_get_serial_port_data(port);
974 if (!portdata)
975 continue;
976 kfree(portdata);
977 }
978 }
979
980 #ifdef CONFIG_PM
981 static void stop_read_write_urbs(struct usb_serial *serial)
982 {
983 int i;
984 struct usb_serial_port *port;
985 struct sierra_port_private *portdata;
986
987 /* Stop reading/writing urbs */
988 for (i = 0; i < serial->num_ports; ++i) {
989 port = serial->port[i];
990 portdata = usb_get_serial_port_data(port);
991 sierra_stop_rx_urbs(port);
992 usb_kill_anchored_urbs(&portdata->active);
993 }
994 }
995
996 static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
997 {
998 struct sierra_intf_private *intfdata;
999 int b;
1000
1001 if (message.event & PM_EVENT_AUTO) {
1002 intfdata = serial->private;
1003 spin_lock_irq(&intfdata->susp_lock);
1004 b = intfdata->in_flight;
1005
1006 if (b) {
1007 spin_unlock_irq(&intfdata->susp_lock);
1008 return -EBUSY;
1009 } else {
1010 intfdata->suspended = 1;
1011 spin_unlock_irq(&intfdata->susp_lock);
1012 }
1013 }
1014 stop_read_write_urbs(serial);
1015
1016 return 0;
1017 }
1018
1019 static int sierra_resume(struct usb_serial *serial)
1020 {
1021 struct usb_serial_port *port;
1022 struct sierra_intf_private *intfdata = serial->private;
1023 struct sierra_port_private *portdata;
1024 struct urb *urb;
1025 int ec = 0;
1026 int i, err;
1027
1028 spin_lock_irq(&intfdata->susp_lock);
1029 for (i = 0; i < serial->num_ports; i++) {
1030 port = serial->port[i];
1031 portdata = usb_get_serial_port_data(port);
1032
1033 while ((urb = usb_get_from_anchor(&portdata->delayed))) {
1034 usb_anchor_urb(urb, &portdata->active);
1035 intfdata->in_flight++;
1036 err = usb_submit_urb(urb, GFP_ATOMIC);
1037 if (err < 0) {
1038 intfdata->in_flight--;
1039 usb_unanchor_urb(urb);
1040 usb_scuttle_anchored_urbs(&portdata->delayed);
1041 break;
1042 }
1043 }
1044
1045 if (portdata->opened) {
1046 err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
1047 if (err)
1048 ec++;
1049 }
1050 }
1051 intfdata->suspended = 0;
1052 spin_unlock_irq(&intfdata->susp_lock);
1053
1054 return ec ? -EIO : 0;
1055 }
1056
1057 static int sierra_reset_resume(struct usb_interface *intf)
1058 {
1059 struct usb_serial *serial = usb_get_intfdata(intf);
1060 dev_err(&serial->dev->dev, "%s\n", __func__);
1061 return usb_serial_resume(intf);
1062 }
1063 #else
1064 #define sierra_suspend NULL
1065 #define sierra_resume NULL
1066 #define sierra_reset_resume NULL
1067 #endif
1068
1069 static struct usb_driver sierra_driver = {
1070 .name = "sierra",
1071 .probe = usb_serial_probe,
1072 .disconnect = usb_serial_disconnect,
1073 .suspend = usb_serial_suspend,
1074 .resume = usb_serial_resume,
1075 .reset_resume = sierra_reset_resume,
1076 .id_table = id_table,
1077 .no_dynamic_id = 1,
1078 .supports_autosuspend = 1,
1079 };
1080
1081 static struct usb_serial_driver sierra_device = {
1082 .driver = {
1083 .owner = THIS_MODULE,
1084 .name = "sierra",
1085 },
1086 .description = "Sierra USB modem",
1087 .id_table = id_table,
1088 .usb_driver = &sierra_driver,
1089 .calc_num_ports = sierra_calc_num_ports,
1090 .probe = sierra_probe,
1091 .open = sierra_open,
1092 .close = sierra_close,
1093 .dtr_rts = sierra_dtr_rts,
1094 .write = sierra_write,
1095 .write_room = sierra_write_room,
1096 .set_termios = sierra_set_termios,
1097 .tiocmget = sierra_tiocmget,
1098 .tiocmset = sierra_tiocmset,
1099 .attach = sierra_startup,
1100 .release = sierra_release,
1101 .suspend = sierra_suspend,
1102 .resume = sierra_resume,
1103 .read_int_callback = sierra_instat_callback,
1104 };
1105
1106 /* Functions used by new usb-serial code. */
1107 static int __init sierra_init(void)
1108 {
1109 int retval;
1110 retval = usb_serial_register(&sierra_device);
1111 if (retval)
1112 goto failed_device_register;
1113
1114
1115 retval = usb_register(&sierra_driver);
1116 if (retval)
1117 goto failed_driver_register;
1118
1119 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1120 DRIVER_DESC "\n");
1121
1122 return 0;
1123
1124 failed_driver_register:
1125 usb_serial_deregister(&sierra_device);
1126 failed_device_register:
1127 return retval;
1128 }
1129
1130 static void __exit sierra_exit(void)
1131 {
1132 usb_deregister(&sierra_driver);
1133 usb_serial_deregister(&sierra_device);
1134 }
1135
1136 module_init(sierra_init);
1137 module_exit(sierra_exit);
1138
1139 MODULE_AUTHOR(DRIVER_AUTHOR);
1140 MODULE_DESCRIPTION(DRIVER_DESC);
1141 MODULE_VERSION(DRIVER_VERSION);
1142 MODULE_LICENSE("GPL");
1143
1144 module_param(nmea, bool, S_IRUGO | S_IWUSR);
1145 MODULE_PARM_DESC(nmea, "NMEA streaming");
1146
1147 module_param(debug, bool, S_IRUGO | S_IWUSR);
1148 MODULE_PARM_DESC(debug, "Debug messages");
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