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USB: serial: sierra driver send_setup() autopm fix
[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
20 #define DRIVER_VERSION "v.1.3.8"
21 #define DRIVER_AUTHOR "Kevin Lloyd, Elina Pasheva, Matthew Safar, Rory Filer"
22 #define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
23
24 #include <linux/kernel.h>
25 #include <linux/jiffies.h>
26 #include <linux/errno.h>
27 #include <linux/tty.h>
28 #include <linux/tty_flip.h>
29 #include <linux/module.h>
30 #include <linux/usb.h>
31 #include <linux/usb/serial.h>
32
33 #define SWIMS_USB_REQUEST_SetPower 0x00
34 #define SWIMS_USB_REQUEST_SetNmea 0x07
35
36 #define N_IN_URB 8
37 #define N_OUT_URB 64
38 #define IN_BUFLEN 4096
39
40 #define MAX_TRANSFER (PAGE_SIZE - 512)
41 /* MAX_TRANSFER is chosen so that the VM is not stressed by
42 allocations > PAGE_SIZE and the number of packets in a page
43 is an integer 512 is the largest possible packet on EHCI */
44
45 static int debug;
46 static int nmea;
47
48 /* Used in interface blacklisting */
49 struct sierra_iface_info {
50 const u32 infolen; /* number of interface numbers on blacklist */
51 const u8 *ifaceinfo; /* pointer to the array holding the numbers */
52 };
53
54 struct sierra_intf_private {
55 spinlock_t susp_lock;
56 unsigned int suspended:1;
57 int in_flight;
58 };
59
60 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
61 {
62 int result;
63 dev_dbg(&udev->dev, "%s\n", __func__);
64 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
65 SWIMS_USB_REQUEST_SetPower, /* __u8 request */
66 USB_TYPE_VENDOR, /* __u8 request type */
67 swiState, /* __u16 value */
68 0, /* __u16 index */
69 NULL, /* void *data */
70 0, /* __u16 size */
71 USB_CTRL_SET_TIMEOUT); /* int timeout */
72 return result;
73 }
74
75 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
76 {
77 int result;
78 dev_dbg(&udev->dev, "%s\n", __func__);
79 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
80 SWIMS_USB_REQUEST_SetNmea, /* __u8 request */
81 USB_TYPE_VENDOR, /* __u8 request type */
82 enable, /* __u16 value */
83 0x0000, /* __u16 index */
84 NULL, /* void *data */
85 0, /* __u16 size */
86 USB_CTRL_SET_TIMEOUT); /* int timeout */
87 return result;
88 }
89
90 static int sierra_calc_num_ports(struct usb_serial *serial)
91 {
92 int num_ports = 0;
93 u8 ifnum, numendpoints;
94
95 dev_dbg(&serial->dev->dev, "%s\n", __func__);
96
97 ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
98 numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
99
100 /* Dummy interface present on some SKUs should be ignored */
101 if (ifnum == 0x99)
102 num_ports = 0;
103 else if (numendpoints <= 3)
104 num_ports = 1;
105 else
106 num_ports = (numendpoints-1)/2;
107 return num_ports;
108 }
109
110 static int is_blacklisted(const u8 ifnum,
111 const struct sierra_iface_info *blacklist)
112 {
113 const u8 *info;
114 int i;
115
116 if (blacklist) {
117 info = blacklist->ifaceinfo;
118
119 for (i = 0; i < blacklist->infolen; i++) {
120 if (info[i] == ifnum)
121 return 1;
122 }
123 }
124 return 0;
125 }
126
127 static int sierra_calc_interface(struct usb_serial *serial)
128 {
129 int interface;
130 struct usb_interface *p_interface;
131 struct usb_host_interface *p_host_interface;
132 dev_dbg(&serial->dev->dev, "%s\n", __func__);
133
134 /* Get the interface structure pointer from the serial struct */
135 p_interface = serial->interface;
136
137 /* Get a pointer to the host interface structure */
138 p_host_interface = p_interface->cur_altsetting;
139
140 /* read the interface descriptor for this active altsetting
141 * to find out the interface number we are on
142 */
143 interface = p_host_interface->desc.bInterfaceNumber;
144
145 return interface;
146 }
147
148 static int sierra_probe(struct usb_serial *serial,
149 const struct usb_device_id *id)
150 {
151 int result = 0;
152 struct usb_device *udev;
153 struct sierra_intf_private *data;
154 u8 ifnum;
155
156 udev = serial->dev;
157 dev_dbg(&udev->dev, "%s\n", __func__);
158
159 ifnum = sierra_calc_interface(serial);
160 /*
161 * If this interface supports more than 1 alternate
162 * select the 2nd one
163 */
164 if (serial->interface->num_altsetting == 2) {
165 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
166 ifnum);
167 /* We know the alternate setting is 1 for the MC8785 */
168 usb_set_interface(udev, ifnum, 1);
169 }
170
171 /* ifnum could have changed - by calling usb_set_interface */
172 ifnum = sierra_calc_interface(serial);
173
174 if (is_blacklisted(ifnum,
175 (struct sierra_iface_info *)id->driver_info)) {
176 dev_dbg(&serial->dev->dev,
177 "Ignoring blacklisted interface #%d\n", ifnum);
178 return -ENODEV;
179 }
180
181 data = serial->private = kzalloc(sizeof(struct sierra_intf_private), GFP_KERNEL);
182 if (!data)
183 return -ENOMEM;
184 spin_lock_init(&data->susp_lock);
185
186 return result;
187 }
188
189 static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11 };
190 static const struct sierra_iface_info direct_ip_interface_blacklist = {
191 .infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces),
192 .ifaceinfo = direct_ip_non_serial_ifaces,
193 };
194
195 static struct usb_device_id id_table [] = {
196 { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
197 { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */
198 { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */
199
200 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
201 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
202 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
203 { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
204 { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
205 { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */
206 { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
207 { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */
208 { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
209 { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
210 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
211 { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
212 /* Sierra Wireless C597 */
213 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
214 /* Sierra Wireless T598 */
215 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
216 { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */
217 { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */
218 { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */
219 { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */
220
221 { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
222 { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
223 { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
224 { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */
225 { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */
226 { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */
227 { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
228 { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */
229 { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
230 { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */
231 { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
232 { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
233 { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */
234 { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
235 { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
236 { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */
237 { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */
238 { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */
239 { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */
240 { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
241 { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
242 /* Sierra Wireless MC8790, MC8791, MC8792 Composite */
243 { USB_DEVICE(0x1199, 0x683C) },
244 { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
245 /* Sierra Wireless MC8790, MC8791, MC8792 */
246 { USB_DEVICE(0x1199, 0x683E) },
247 { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
248 { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
249 { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
250 { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
251 { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
252 { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
253 { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
254 { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
255 /* Sierra Wireless C885 */
256 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
257 /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */
258 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
259 /* Sierra Wireless C22/C33 */
260 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
261 /* Sierra Wireless HSPA Non-Composite Device */
262 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
263 { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */
264 { USB_DEVICE(0x1199, 0x68A3), /* Sierra Wireless Direct IP modems */
265 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
266 },
267
268 { }
269 };
270 MODULE_DEVICE_TABLE(usb, id_table);
271
272 static struct usb_driver sierra_driver = {
273 .name = "sierra",
274 .probe = usb_serial_probe,
275 .disconnect = usb_serial_disconnect,
276 .suspend = usb_serial_suspend,
277 .resume = usb_serial_resume,
278 .id_table = id_table,
279 .no_dynamic_id = 1,
280 .supports_autosuspend = 1,
281 };
282
283 struct sierra_port_private {
284 spinlock_t lock; /* lock the structure */
285 int outstanding_urbs; /* number of out urbs in flight */
286 struct usb_anchor active;
287 struct usb_anchor delayed;
288
289 /* Input endpoints and buffers for this port */
290 struct urb *in_urbs[N_IN_URB];
291
292 /* Settings for the port */
293 int rts_state; /* Handshaking pins (outputs) */
294 int dtr_state;
295 int cts_state; /* Handshaking pins (inputs) */
296 int dsr_state;
297 int dcd_state;
298 int ri_state;
299 unsigned int opened:1;
300 };
301
302 static int sierra_send_setup(struct usb_serial_port *port)
303 {
304 struct usb_serial *serial = port->serial;
305 struct sierra_port_private *portdata;
306 __u16 interface = 0;
307 int val = 0;
308 int do_send = 0;
309 int retval;
310
311 dev_dbg(&port->dev, "%s\n", __func__);
312
313 portdata = usb_get_serial_port_data(port);
314
315 if (portdata->dtr_state)
316 val |= 0x01;
317 if (portdata->rts_state)
318 val |= 0x02;
319
320 /* If composite device then properly report interface */
321 if (serial->num_ports == 1) {
322 interface = sierra_calc_interface(serial);
323 /* Control message is sent only to interfaces with
324 * interrupt_in endpoints
325 */
326 if (port->interrupt_in_urb) {
327 /* send control message */
328 do_send = 1;
329 }
330 }
331
332 /* Otherwise the need to do non-composite mapping */
333 else {
334 if (port->bulk_out_endpointAddress == 2)
335 interface = 0;
336 else if (port->bulk_out_endpointAddress == 4)
337 interface = 1;
338 else if (port->bulk_out_endpointAddress == 5)
339 interface = 2;
340
341 do_send = 1;
342 }
343 if (!do_send)
344 return 0;
345
346 usb_autopm_get_interface(serial->interface);
347 retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
348 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
349 usb_autopm_put_interface(serial->interface);
350
351 return retval;
352 }
353
354 static void sierra_set_termios(struct tty_struct *tty,
355 struct usb_serial_port *port, struct ktermios *old_termios)
356 {
357 dev_dbg(&port->dev, "%s\n", __func__);
358 tty_termios_copy_hw(tty->termios, old_termios);
359 sierra_send_setup(port);
360 }
361
362 static int sierra_tiocmget(struct tty_struct *tty, struct file *file)
363 {
364 struct usb_serial_port *port = tty->driver_data;
365 unsigned int value;
366 struct sierra_port_private *portdata;
367
368 dev_dbg(&port->dev, "%s\n", __func__);
369 portdata = usb_get_serial_port_data(port);
370
371 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
372 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
373 ((portdata->cts_state) ? TIOCM_CTS : 0) |
374 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
375 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
376 ((portdata->ri_state) ? TIOCM_RNG : 0);
377
378 return value;
379 }
380
381 static int sierra_tiocmset(struct tty_struct *tty, struct file *file,
382 unsigned int set, unsigned int clear)
383 {
384 struct usb_serial_port *port = tty->driver_data;
385 struct sierra_port_private *portdata;
386
387 portdata = usb_get_serial_port_data(port);
388
389 if (set & TIOCM_RTS)
390 portdata->rts_state = 1;
391 if (set & TIOCM_DTR)
392 portdata->dtr_state = 1;
393
394 if (clear & TIOCM_RTS)
395 portdata->rts_state = 0;
396 if (clear & TIOCM_DTR)
397 portdata->dtr_state = 0;
398 return sierra_send_setup(port);
399 }
400
401 static void sierra_release_urb(struct urb *urb)
402 {
403 struct usb_serial_port *port;
404 if (urb) {
405 port = urb->context;
406 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
407 kfree(urb->transfer_buffer);
408 usb_free_urb(urb);
409 }
410 }
411
412 static void sierra_outdat_callback(struct urb *urb)
413 {
414 struct usb_serial_port *port = urb->context;
415 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
416 struct sierra_intf_private *intfdata;
417 int status = urb->status;
418
419 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
420 intfdata = port->serial->private;
421
422 /* free up the transfer buffer, as usb_free_urb() does not do this */
423 kfree(urb->transfer_buffer);
424 usb_autopm_put_interface_async(port->serial->interface);
425 if (status)
426 dev_dbg(&port->dev, "%s - nonzero write bulk status "
427 "received: %d\n", __func__, status);
428
429 spin_lock(&portdata->lock);
430 --portdata->outstanding_urbs;
431 spin_unlock(&portdata->lock);
432 spin_lock(&intfdata->susp_lock);
433 --intfdata->in_flight;
434 spin_unlock(&intfdata->susp_lock);
435
436 usb_serial_port_softint(port);
437 }
438
439 /* Write */
440 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
441 const unsigned char *buf, int count)
442 {
443 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
444 struct sierra_intf_private *intfdata;
445 struct usb_serial *serial = port->serial;
446 unsigned long flags;
447 unsigned char *buffer;
448 struct urb *urb;
449 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
450 int retval = 0;
451
452 /* verify that we actually have some data to write */
453 if (count == 0)
454 return 0;
455
456 portdata = usb_get_serial_port_data(port);
457 intfdata = serial->private;
458
459 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
460 spin_lock_irqsave(&portdata->lock, flags);
461 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
462 portdata->outstanding_urbs);
463 if (portdata->outstanding_urbs > N_OUT_URB) {
464 spin_unlock_irqrestore(&portdata->lock, flags);
465 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
466 return 0;
467 }
468 portdata->outstanding_urbs++;
469 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
470 portdata->outstanding_urbs);
471 spin_unlock_irqrestore(&portdata->lock, flags);
472
473 retval = usb_autopm_get_interface_async(serial->interface);
474 if (retval < 0) {
475 spin_lock_irqsave(&portdata->lock, flags);
476 portdata->outstanding_urbs--;
477 spin_unlock_irqrestore(&portdata->lock, flags);
478 goto error_simple;
479 }
480
481 buffer = kmalloc(writesize, GFP_ATOMIC);
482 if (!buffer) {
483 dev_err(&port->dev, "out of memory\n");
484 retval = -ENOMEM;
485 goto error_no_buffer;
486 }
487
488 urb = usb_alloc_urb(0, GFP_ATOMIC);
489 if (!urb) {
490 dev_err(&port->dev, "no more free urbs\n");
491 retval = -ENOMEM;
492 goto error_no_urb;
493 }
494
495 memcpy(buffer, buf, writesize);
496
497 usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer);
498
499 usb_fill_bulk_urb(urb, serial->dev,
500 usb_sndbulkpipe(serial->dev,
501 port->bulk_out_endpointAddress),
502 buffer, writesize, sierra_outdat_callback, port);
503
504 /* Handle the need to send a zero length packet */
505 urb->transfer_flags |= URB_ZERO_PACKET;
506
507 spin_lock_irqsave(&intfdata->susp_lock, flags);
508
509 if (intfdata->suspended) {
510 usb_anchor_urb(urb, &portdata->delayed);
511 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
512 goto skip_power;
513 } else {
514 usb_anchor_urb(urb, &portdata->active);
515 }
516 /* send it down the pipe */
517 retval = usb_submit_urb(urb, GFP_ATOMIC);
518 if (retval) {
519 usb_unanchor_urb(urb);
520 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
521 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
522 "with status = %d\n", __func__, retval);
523 goto error;
524 } else {
525 intfdata->in_flight++;
526 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
527 }
528
529 skip_power:
530 /* we are done with this urb, so let the host driver
531 * really free it when it is finished with it */
532 usb_free_urb(urb);
533
534 return writesize;
535 error:
536 usb_free_urb(urb);
537 error_no_urb:
538 kfree(buffer);
539 error_no_buffer:
540 spin_lock_irqsave(&portdata->lock, flags);
541 --portdata->outstanding_urbs;
542 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
543 portdata->outstanding_urbs);
544 spin_unlock_irqrestore(&portdata->lock, flags);
545 usb_autopm_put_interface_async(serial->interface);
546 error_simple:
547 return retval;
548 }
549
550 static void sierra_indat_callback(struct urb *urb)
551 {
552 int err;
553 int endpoint;
554 struct usb_serial_port *port;
555 struct tty_struct *tty;
556 unsigned char *data = urb->transfer_buffer;
557 int status = urb->status;
558
559 endpoint = usb_pipeendpoint(urb->pipe);
560 port = urb->context;
561
562 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
563
564 if (status) {
565 dev_dbg(&port->dev, "%s: nonzero status: %d on"
566 " endpoint %02x\n", __func__, status, endpoint);
567 } else {
568 if (urb->actual_length) {
569 tty = tty_port_tty_get(&port->port);
570
571 tty_buffer_request_room(tty, urb->actual_length);
572 tty_insert_flip_string(tty, data, urb->actual_length);
573 tty_flip_buffer_push(tty);
574
575 tty_kref_put(tty);
576 usb_serial_debug_data(debug, &port->dev, __func__,
577 urb->actual_length, data);
578 } else {
579 dev_dbg(&port->dev, "%s: empty read urb"
580 " received\n", __func__);
581 }
582 }
583
584 /* Resubmit urb so we continue receiving */
585 if (port->port.count && status != -ESHUTDOWN && status != -EPERM) {
586 usb_mark_last_busy(port->serial->dev);
587 err = usb_submit_urb(urb, GFP_ATOMIC);
588 if (err)
589 dev_err(&port->dev, "resubmit read urb failed."
590 "(%d)\n", err);
591 }
592
593 return;
594 }
595
596 static void sierra_instat_callback(struct urb *urb)
597 {
598 int err;
599 int status = urb->status;
600 struct usb_serial_port *port = urb->context;
601 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
602 struct usb_serial *serial = port->serial;
603
604 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
605 urb, port, portdata);
606
607 if (status == 0) {
608 struct usb_ctrlrequest *req_pkt =
609 (struct usb_ctrlrequest *)urb->transfer_buffer;
610
611 if (!req_pkt) {
612 dev_dbg(&port->dev, "%s: NULL req_pkt\n",
613 __func__);
614 return;
615 }
616 if ((req_pkt->bRequestType == 0xA1) &&
617 (req_pkt->bRequest == 0x20)) {
618 int old_dcd_state;
619 unsigned char signals = *((unsigned char *)
620 urb->transfer_buffer +
621 sizeof(struct usb_ctrlrequest));
622 struct tty_struct *tty;
623
624 dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
625 signals);
626
627 old_dcd_state = portdata->dcd_state;
628 portdata->cts_state = 1;
629 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
630 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
631 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
632
633 tty = tty_port_tty_get(&port->port);
634 if (tty && !C_CLOCAL(tty) &&
635 old_dcd_state && !portdata->dcd_state)
636 tty_hangup(tty);
637 tty_kref_put(tty);
638 } else {
639 dev_dbg(&port->dev, "%s: type %x req %x\n",
640 __func__, req_pkt->bRequestType,
641 req_pkt->bRequest);
642 }
643 } else
644 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
645
646 /* Resubmit urb so we continue receiving IRQ data */
647 if (port->port.count && status != -ESHUTDOWN && status != -ENOENT) {
648 usb_mark_last_busy(serial->dev);
649 urb->dev = serial->dev;
650 err = usb_submit_urb(urb, GFP_ATOMIC);
651 if (err)
652 dev_err(&port->dev, "%s: resubmit intr urb "
653 "failed. (%d)\n", __func__, err);
654 }
655 }
656
657 static int sierra_write_room(struct tty_struct *tty)
658 {
659 struct usb_serial_port *port = tty->driver_data;
660 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
661 unsigned long flags;
662
663 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
664
665 /* try to give a good number back based on if we have any free urbs at
666 * this point in time */
667 spin_lock_irqsave(&portdata->lock, flags);
668 if (portdata->outstanding_urbs > N_OUT_URB * 2 / 3) {
669 spin_unlock_irqrestore(&portdata->lock, flags);
670 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
671 return 0;
672 }
673 spin_unlock_irqrestore(&portdata->lock, flags);
674
675 return 2048;
676 }
677
678 static void sierra_stop_rx_urbs(struct usb_serial_port *port)
679 {
680 int i;
681 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
682
683 for (i = 0; i < ARRAY_SIZE(portdata->in_urbs); i++)
684 usb_kill_urb(portdata->in_urbs[i]);
685
686 usb_kill_urb(port->interrupt_in_urb);
687 }
688
689 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
690 {
691 int ok_cnt;
692 int err = -EINVAL;
693 int i;
694 struct urb *urb;
695 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
696
697 ok_cnt = 0;
698 for (i = 0; i < ARRAY_SIZE(portdata->in_urbs); i++) {
699 urb = portdata->in_urbs[i];
700 if (!urb)
701 continue;
702 err = usb_submit_urb(urb, mem_flags);
703 if (err) {
704 dev_err(&port->dev, "%s: submit urb failed: %d\n",
705 __func__, err);
706 } else {
707 ok_cnt++;
708 }
709 }
710
711 if (ok_cnt && port->interrupt_in_urb) {
712 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
713 if (err) {
714 dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
715 __func__, err);
716 }
717 }
718
719 if (ok_cnt > 0) /* at least one rx urb submitted */
720 return 0;
721 else
722 return err;
723 }
724
725 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
726 int dir, void *ctx, int len,
727 gfp_t mem_flags,
728 usb_complete_t callback)
729 {
730 struct urb *urb;
731 u8 *buf;
732
733 if (endpoint == -1)
734 return NULL;
735
736 urb = usb_alloc_urb(0, mem_flags);
737 if (urb == NULL) {
738 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n",
739 __func__, endpoint);
740 return NULL;
741 }
742
743 buf = kmalloc(len, mem_flags);
744 if (buf) {
745 /* Fill URB using supplied data */
746 usb_fill_bulk_urb(urb, serial->dev,
747 usb_sndbulkpipe(serial->dev, endpoint) | dir,
748 buf, len, callback, ctx);
749
750 /* debug */
751 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
752 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
753 } else {
754 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__,
755 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
756
757 sierra_release_urb(urb);
758 urb = NULL;
759 }
760
761 return urb;
762 }
763
764 static void sierra_close(struct usb_serial_port *port)
765 {
766 int i;
767 struct usb_serial *serial = port->serial;
768 struct sierra_port_private *portdata;
769 struct sierra_intf_private *intfdata = port->serial->private;
770
771
772 dev_dbg(&port->dev, "%s\n", __func__);
773 portdata = usb_get_serial_port_data(port);
774
775 portdata->rts_state = 0;
776 portdata->dtr_state = 0;
777
778 if (serial->dev) {
779 mutex_lock(&serial->disc_mutex);
780 if (!serial->disconnected)
781 sierra_send_setup(port);
782 mutex_unlock(&serial->disc_mutex);
783 spin_lock_irq(&intfdata->susp_lock);
784 portdata->opened = 0;
785 spin_unlock_irq(&intfdata->susp_lock);
786
787
788 /* Stop reading urbs */
789 sierra_stop_rx_urbs(port);
790 /* .. and release them */
791 for (i = 0; i < N_IN_URB; i++) {
792 sierra_release_urb(portdata->in_urbs[i]);
793 portdata->in_urbs[i] = NULL;
794 }
795 usb_autopm_get_interface(serial->interface);
796 serial->interface->needs_remote_wakeup = 0;
797 }
798 }
799
800 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
801 {
802 struct sierra_port_private *portdata;
803 struct usb_serial *serial = port->serial;
804 struct sierra_intf_private *intfdata = serial->private;
805 int i;
806 int err;
807 int endpoint;
808 struct urb *urb;
809
810 portdata = usb_get_serial_port_data(port);
811
812 dev_dbg(&port->dev, "%s\n", __func__);
813
814 /* Set some sane defaults */
815 portdata->rts_state = 1;
816 portdata->dtr_state = 1;
817
818
819 endpoint = port->bulk_in_endpointAddress;
820 for (i = 0; i < ARRAY_SIZE(portdata->in_urbs); i++) {
821 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
822 IN_BUFLEN, GFP_KERNEL,
823 sierra_indat_callback);
824 portdata->in_urbs[i] = urb;
825 }
826 /* clear halt condition */
827 usb_clear_halt(serial->dev,
828 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
829
830 err = sierra_submit_rx_urbs(port, GFP_KERNEL);
831 if (err) {
832 /* get rid of everything as in close */
833 sierra_close(port);
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 usb_serial *serial = port->serial;
851 struct sierra_port_private *portdata;
852
853 portdata = usb_get_serial_port_data(port);
854 portdata->rts_state = on;
855 portdata->dtr_state = on;
856
857 if (serial->dev) {
858 mutex_lock(&serial->disc_mutex);
859 if (!serial->disconnected)
860 sierra_send_setup(port);
861 mutex_unlock(&serial->disc_mutex);
862 }
863 }
864
865 static int sierra_startup(struct usb_serial *serial)
866 {
867 struct usb_serial_port *port;
868 struct sierra_port_private *portdata;
869 int i;
870
871 dev_dbg(&serial->dev->dev, "%s\n", __func__);
872
873 /* Set Device mode to D0 */
874 sierra_set_power_state(serial->dev, 0x0000);
875
876 /* Check NMEA and set */
877 if (nmea)
878 sierra_vsc_set_nmea(serial->dev, 1);
879
880 /* Now setup per port private data */
881 for (i = 0; i < serial->num_ports; i++) {
882 port = serial->port[i];
883 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
884 if (!portdata) {
885 dev_dbg(&port->dev, "%s: kmalloc for "
886 "sierra_port_private (%d) failed!.\n",
887 __func__, i);
888 return -ENOMEM;
889 }
890 spin_lock_init(&portdata->lock);
891 init_usb_anchor(&portdata->active);
892 init_usb_anchor(&portdata->delayed);
893 /* Set the port private data pointer */
894 usb_set_serial_port_data(port, portdata);
895 }
896
897 return 0;
898 }
899
900 static void sierra_release(struct usb_serial *serial)
901 {
902 int i;
903 struct usb_serial_port *port;
904 struct sierra_port_private *portdata;
905
906 dev_dbg(&serial->dev->dev, "%s\n", __func__);
907
908 for (i = 0; i < serial->num_ports; ++i) {
909 port = serial->port[i];
910 if (!port)
911 continue;
912 portdata = usb_get_serial_port_data(port);
913 if (!portdata)
914 continue;
915 kfree(portdata);
916 }
917 }
918
919 #ifdef CONFIG_PM
920 static void stop_read_write_urbs(struct usb_serial *serial)
921 {
922 int i, j;
923 struct usb_serial_port *port;
924 struct sierra_port_private *portdata;
925
926 /* Stop reading/writing urbs */
927 for (i = 0; i < serial->num_ports; ++i) {
928 port = serial->port[i];
929 portdata = usb_get_serial_port_data(port);
930 for (j = 0; j < N_IN_URB; j++)
931 usb_kill_urb(portdata->in_urbs[j]);
932 usb_kill_anchored_urbs(&portdata->active);
933 }
934 }
935
936 static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
937 {
938 struct sierra_intf_private *intfdata;
939 int b;
940
941 if (serial->dev->auto_pm) {
942 intfdata = serial->private;
943 spin_lock_irq(&intfdata->susp_lock);
944 b = intfdata->in_flight;
945
946 if (b) {
947 spin_unlock_irq(&intfdata->susp_lock);
948 return -EBUSY;
949 } else {
950 intfdata->suspended = 1;
951 spin_unlock_irq(&intfdata->susp_lock);
952 }
953 }
954 stop_read_write_urbs(serial);
955
956 return 0;
957 }
958
959 static int sierra_resume(struct usb_serial *serial)
960 {
961 struct usb_serial_port *port;
962 struct sierra_intf_private *intfdata = serial->private;
963 struct sierra_port_private *portdata;
964 struct urb *urb;
965 int ec = 0;
966 int i, err;
967
968 spin_lock_irq(&intfdata->susp_lock);
969 for (i = 0; i < serial->num_ports; i++) {
970 port = serial->port[i];
971 portdata = usb_get_serial_port_data(port);
972
973 while ((urb = usb_get_from_anchor(&portdata->delayed))) {
974 usb_anchor_urb(urb, &portdata->active);
975 intfdata->in_flight++;
976 err = usb_submit_urb(urb, GFP_ATOMIC);
977 if (err < 0) {
978 intfdata->in_flight--;
979 usb_unanchor_urb(urb);
980 usb_scuttle_anchored_urbs(&portdata->delayed);
981 break;
982 }
983 }
984
985 if (portdata->opened) {
986 err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
987 if (err)
988 ec++;
989 }
990 }
991 intfdata->suspended = 0;
992 spin_unlock_irq(&intfdata->susp_lock);
993
994 return ec ? -EIO : 0;
995 }
996 #else
997 #define sierra_suspend NULL
998 #define sierra_resume NULL
999 #endif
1000
1001 static struct usb_serial_driver sierra_device = {
1002 .driver = {
1003 .owner = THIS_MODULE,
1004 .name = "sierra",
1005 },
1006 .description = "Sierra USB modem",
1007 .id_table = id_table,
1008 .usb_driver = &sierra_driver,
1009 .calc_num_ports = sierra_calc_num_ports,
1010 .probe = sierra_probe,
1011 .open = sierra_open,
1012 .close = sierra_close,
1013 .dtr_rts = sierra_dtr_rts,
1014 .write = sierra_write,
1015 .write_room = sierra_write_room,
1016 .set_termios = sierra_set_termios,
1017 .tiocmget = sierra_tiocmget,
1018 .tiocmset = sierra_tiocmset,
1019 .attach = sierra_startup,
1020 .release = sierra_release,
1021 .suspend = sierra_suspend,
1022 .resume = sierra_resume,
1023 .read_int_callback = sierra_instat_callback,
1024 };
1025
1026 /* Functions used by new usb-serial code. */
1027 static int __init sierra_init(void)
1028 {
1029 int retval;
1030 retval = usb_serial_register(&sierra_device);
1031 if (retval)
1032 goto failed_device_register;
1033
1034
1035 retval = usb_register(&sierra_driver);
1036 if (retval)
1037 goto failed_driver_register;
1038
1039 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1040 DRIVER_DESC "\n");
1041
1042 return 0;
1043
1044 failed_driver_register:
1045 usb_serial_deregister(&sierra_device);
1046 failed_device_register:
1047 return retval;
1048 }
1049
1050 static void __exit sierra_exit(void)
1051 {
1052 usb_deregister(&sierra_driver);
1053 usb_serial_deregister(&sierra_device);
1054 }
1055
1056 module_init(sierra_init);
1057 module_exit(sierra_exit);
1058
1059 MODULE_AUTHOR(DRIVER_AUTHOR);
1060 MODULE_DESCRIPTION(DRIVER_DESC);
1061 MODULE_VERSION(DRIVER_VERSION);
1062 MODULE_LICENSE("GPL");
1063
1064 module_param(nmea, bool, S_IRUGO | S_IWUSR);
1065 MODULE_PARM_DESC(nmea, "NMEA streaming");
1066
1067 module_param(debug, bool, S_IRUGO | S_IWUSR);
1068 MODULE_PARM_DESC(debug, "Debug messages");
Linux kernel - Deliverables
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