blob: be9cb61b4d1987659828e32a7d461f8c92a09847 [file] [log] [blame]
Matthew Garrett0d456192010-04-01 12:31:07 -04001/*
2 USB Driver layer for GSM modems
3
4 Copyright (C) 2005 Matthias Urlichs <smurf@smurf.noris.de>
5
6 This driver is free software; you can redistribute it and/or modify
7 it under the terms of Version 2 of the GNU General Public License as
8 published by the Free Software Foundation.
9
10 Portions copied from the Keyspan driver by Hugh Blemings <hugh@blemings.org>
11
12 History: see the git log.
13
14 Work sponsored by: Sigos GmbH, Germany <info@sigos.de>
15
16 This driver exists because the "normal" serial driver doesn't work too well
17 with GSM modems. Issues:
18 - data loss -- one single Receive URB is not nearly enough
19 - controlling the baud rate doesn't make sense
20*/
21
Matthew Garrett0d456192010-04-01 12:31:07 -040022#define DRIVER_AUTHOR "Matthias Urlichs <smurf@smurf.noris.de>"
23#define DRIVER_DESC "USB Driver for GSM modems"
24
25#include <linux/kernel.h>
26#include <linux/jiffies.h>
27#include <linux/errno.h>
28#include <linux/slab.h>
29#include <linux/tty.h>
30#include <linux/tty_flip.h>
31#include <linux/module.h>
32#include <linux/bitops.h>
Peter Huewe66921ed2010-12-09 23:27:35 +010033#include <linux/uaccess.h>
Matthew Garrett0d456192010-04-01 12:31:07 -040034#include <linux/usb.h>
35#include <linux/usb/serial.h>
Dan Williams02303f72010-11-19 16:04:00 -060036#include <linux/serial.h>
Matthew Garrett0d456192010-04-01 12:31:07 -040037#include "usb-wwan.h"
38
David Ward669e7292015-09-16 12:27:57 -040039/*
40 * Generate DTR/RTS signals on the port using the SET_CONTROL_LINE_STATE request
41 * in CDC ACM.
42 */
43static int usb_wwan_send_setup(struct usb_serial_port *port)
44{
45 struct usb_serial *serial = port->serial;
46 struct usb_wwan_port_private *portdata;
47 int val = 0;
48 int ifnum;
49 int res;
50
51 portdata = usb_get_serial_port_data(port);
52
53 if (portdata->dtr_state)
54 val |= 0x01;
55 if (portdata->rts_state)
56 val |= 0x02;
57
58 ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
59
60 res = usb_autopm_get_interface(serial->interface);
61 if (res)
62 return res;
63
64 res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
65 0x22, 0x21, val, ifnum, NULL, 0,
66 USB_CTRL_SET_TIMEOUT);
67
68 usb_autopm_put_interface(port->serial->interface);
69
70 return res;
71}
72
Matthew Garrett0d456192010-04-01 12:31:07 -040073void usb_wwan_dtr_rts(struct usb_serial_port *port, int on)
74{
Matthew Garrett0d456192010-04-01 12:31:07 -040075 struct usb_wwan_port_private *portdata;
Matthew Garrett0d456192010-04-01 12:31:07 -040076 struct usb_wwan_intf_private *intfdata;
77
Johan Hovold37357ca2014-05-26 19:23:26 +020078 intfdata = usb_get_serial_data(port->serial);
Matthew Garrett0d456192010-04-01 12:31:07 -040079
David Ward669e7292015-09-16 12:27:57 -040080 if (!intfdata->use_send_setup)
Matthew Garrett0d456192010-04-01 12:31:07 -040081 return;
82
83 portdata = usb_get_serial_port_data(port);
Johan Hovoldb2ca6992013-02-13 17:53:28 +010084 /* FIXME: locking */
Matthew Garrett0d456192010-04-01 12:31:07 -040085 portdata->rts_state = on;
86 portdata->dtr_state = on;
Johan Hovoldb2ca6992013-02-13 17:53:28 +010087
David Ward669e7292015-09-16 12:27:57 -040088 usb_wwan_send_setup(port);
Matthew Garrett0d456192010-04-01 12:31:07 -040089}
90EXPORT_SYMBOL(usb_wwan_dtr_rts);
91
Alan Cox60b33c12011-02-14 16:26:14 +000092int usb_wwan_tiocmget(struct tty_struct *tty)
Matthew Garrett0d456192010-04-01 12:31:07 -040093{
94 struct usb_serial_port *port = tty->driver_data;
95 unsigned int value;
96 struct usb_wwan_port_private *portdata;
97
98 portdata = usb_get_serial_port_data(port);
99
100 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
101 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
102 ((portdata->cts_state) ? TIOCM_CTS : 0) |
103 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
104 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
105 ((portdata->ri_state) ? TIOCM_RNG : 0);
106
107 return value;
108}
109EXPORT_SYMBOL(usb_wwan_tiocmget);
110
Alan Cox20b9d172011-02-14 16:26:50 +0000111int usb_wwan_tiocmset(struct tty_struct *tty,
Matthew Garrett0d456192010-04-01 12:31:07 -0400112 unsigned int set, unsigned int clear)
113{
114 struct usb_serial_port *port = tty->driver_data;
115 struct usb_wwan_port_private *portdata;
116 struct usb_wwan_intf_private *intfdata;
117
118 portdata = usb_get_serial_port_data(port);
Johan Hovold37357ca2014-05-26 19:23:26 +0200119 intfdata = usb_get_serial_data(port->serial);
Matthew Garrett0d456192010-04-01 12:31:07 -0400120
David Ward669e7292015-09-16 12:27:57 -0400121 if (!intfdata->use_send_setup)
Matthew Garrett0d456192010-04-01 12:31:07 -0400122 return -EINVAL;
123
124 /* FIXME: what locks portdata fields ? */
125 if (set & TIOCM_RTS)
126 portdata->rts_state = 1;
127 if (set & TIOCM_DTR)
128 portdata->dtr_state = 1;
129
130 if (clear & TIOCM_RTS)
131 portdata->rts_state = 0;
132 if (clear & TIOCM_DTR)
133 portdata->dtr_state = 0;
David Ward669e7292015-09-16 12:27:57 -0400134 return usb_wwan_send_setup(port);
Matthew Garrett0d456192010-04-01 12:31:07 -0400135}
136EXPORT_SYMBOL(usb_wwan_tiocmset);
137
Dan Williams02303f72010-11-19 16:04:00 -0600138static int get_serial_info(struct usb_serial_port *port,
139 struct serial_struct __user *retinfo)
140{
141 struct serial_struct tmp;
142
143 if (!retinfo)
144 return -EFAULT;
145
146 memset(&tmp, 0, sizeof(tmp));
Greg Kroah-Hartmane5b1e202013-06-07 11:04:28 -0700147 tmp.line = port->minor;
Greg Kroah-Hartman11438322013-06-06 10:32:00 -0700148 tmp.port = port->port_number;
Dan Williams02303f72010-11-19 16:04:00 -0600149 tmp.baud_base = tty_get_baud_rate(port->port.tty);
150 tmp.close_delay = port->port.close_delay / 10;
151 tmp.closing_wait = port->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
152 ASYNC_CLOSING_WAIT_NONE :
153 port->port.closing_wait / 10;
154
155 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
156 return -EFAULT;
157 return 0;
158}
159
160static int set_serial_info(struct usb_serial_port *port,
161 struct serial_struct __user *newinfo)
162{
163 struct serial_struct new_serial;
164 unsigned int closing_wait, close_delay;
165 int retval = 0;
166
167 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
168 return -EFAULT;
169
170 close_delay = new_serial.close_delay * 10;
171 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
172 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
173
174 mutex_lock(&port->port.mutex);
175
176 if (!capable(CAP_SYS_ADMIN)) {
177 if ((close_delay != port->port.close_delay) ||
178 (closing_wait != port->port.closing_wait))
179 retval = -EPERM;
180 else
181 retval = -EOPNOTSUPP;
182 } else {
183 port->port.close_delay = close_delay;
184 port->port.closing_wait = closing_wait;
185 }
186
187 mutex_unlock(&port->port.mutex);
188 return retval;
189}
190
Alan Cox00a0d0d2011-02-14 16:27:06 +0000191int usb_wwan_ioctl(struct tty_struct *tty,
Dan Williams02303f72010-11-19 16:04:00 -0600192 unsigned int cmd, unsigned long arg)
193{
194 struct usb_serial_port *port = tty->driver_data;
195
Greg Kroah-Hartmana80be972012-09-13 17:41:50 -0700196 dev_dbg(&port->dev, "%s cmd 0x%04x\n", __func__, cmd);
Dan Williams02303f72010-11-19 16:04:00 -0600197
198 switch (cmd) {
199 case TIOCGSERIAL:
200 return get_serial_info(port,
201 (struct serial_struct __user *) arg);
202 case TIOCSSERIAL:
203 return set_serial_info(port,
204 (struct serial_struct __user *) arg);
205 default:
206 break;
207 }
208
Greg Kroah-Hartmana80be972012-09-13 17:41:50 -0700209 dev_dbg(&port->dev, "%s arg not supported\n", __func__);
Dan Williams02303f72010-11-19 16:04:00 -0600210
211 return -ENOIOCTLCMD;
212}
213EXPORT_SYMBOL(usb_wwan_ioctl);
214
Matthew Garrett0d456192010-04-01 12:31:07 -0400215int usb_wwan_write(struct tty_struct *tty, struct usb_serial_port *port,
216 const unsigned char *buf, int count)
217{
218 struct usb_wwan_port_private *portdata;
219 struct usb_wwan_intf_private *intfdata;
220 int i;
221 int left, todo;
222 struct urb *this_urb = NULL; /* spurious */
223 int err;
224 unsigned long flags;
225
226 portdata = usb_get_serial_port_data(port);
Johan Hovold37357ca2014-05-26 19:23:26 +0200227 intfdata = usb_get_serial_data(port->serial);
Matthew Garrett0d456192010-04-01 12:31:07 -0400228
Greg Kroah-Hartmana80be972012-09-13 17:41:50 -0700229 dev_dbg(&port->dev, "%s: write (%d chars)\n", __func__, count);
Matthew Garrett0d456192010-04-01 12:31:07 -0400230
231 i = 0;
232 left = count;
233 for (i = 0; left > 0 && i < N_OUT_URB; i++) {
234 todo = left;
235 if (todo > OUT_BUFLEN)
236 todo = OUT_BUFLEN;
237
238 this_urb = portdata->out_urbs[i];
239 if (test_and_set_bit(i, &portdata->out_busy)) {
240 if (time_before(jiffies,
241 portdata->tx_start_time[i] + 10 * HZ))
242 continue;
243 usb_unlink_urb(this_urb);
244 continue;
245 }
Greg Kroah-Hartmana80be972012-09-13 17:41:50 -0700246 dev_dbg(&port->dev, "%s: endpoint %d buf %d\n", __func__,
247 usb_pipeendpoint(this_urb->pipe), i);
Matthew Garrett0d456192010-04-01 12:31:07 -0400248
249 err = usb_autopm_get_interface_async(port->serial->interface);
xiao jindb090472014-05-26 19:23:13 +0200250 if (err < 0) {
251 clear_bit(i, &portdata->out_busy);
Matthew Garrett0d456192010-04-01 12:31:07 -0400252 break;
xiao jindb090472014-05-26 19:23:13 +0200253 }
Matthew Garrett0d456192010-04-01 12:31:07 -0400254
255 /* send the data */
256 memcpy(this_urb->transfer_buffer, buf, todo);
257 this_urb->transfer_buffer_length = todo;
258
259 spin_lock_irqsave(&intfdata->susp_lock, flags);
260 if (intfdata->suspended) {
261 usb_anchor_urb(this_urb, &portdata->delayed);
262 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
263 } else {
264 intfdata->in_flight++;
265 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
266 err = usb_submit_urb(this_urb, GFP_ATOMIC);
267 if (err) {
Johan Hovold8bb7ec62014-05-26 19:23:31 +0200268 dev_err(&port->dev,
269 "%s: submit urb %d failed: %d\n",
270 __func__, i, err);
Matthew Garrett0d456192010-04-01 12:31:07 -0400271 clear_bit(i, &portdata->out_busy);
272 spin_lock_irqsave(&intfdata->susp_lock, flags);
273 intfdata->in_flight--;
274 spin_unlock_irqrestore(&intfdata->susp_lock,
275 flags);
Oliver Neukum3d06bf12011-02-10 15:33:17 +0100276 usb_autopm_put_interface_async(port->serial->interface);
Oliver Neukum433508a2011-02-10 15:33:23 +0100277 break;
Matthew Garrett0d456192010-04-01 12:31:07 -0400278 }
279 }
280
281 portdata->tx_start_time[i] = jiffies;
282 buf += todo;
283 left -= todo;
284 }
285
286 count -= left;
Greg Kroah-Hartmana80be972012-09-13 17:41:50 -0700287 dev_dbg(&port->dev, "%s: wrote (did %d)\n", __func__, count);
Matthew Garrett0d456192010-04-01 12:31:07 -0400288 return count;
289}
290EXPORT_SYMBOL(usb_wwan_write);
291
292static void usb_wwan_indat_callback(struct urb *urb)
293{
294 int err;
295 int endpoint;
296 struct usb_serial_port *port;
Greg Kroah-Hartmana80be972012-09-13 17:41:50 -0700297 struct device *dev;
Matthew Garrett0d456192010-04-01 12:31:07 -0400298 unsigned char *data = urb->transfer_buffer;
299 int status = urb->status;
300
Matthew Garrett0d456192010-04-01 12:31:07 -0400301 endpoint = usb_pipeendpoint(urb->pipe);
302 port = urb->context;
Greg Kroah-Hartmana80be972012-09-13 17:41:50 -0700303 dev = &port->dev;
Matthew Garrett0d456192010-04-01 12:31:07 -0400304
305 if (status) {
Greg Kroah-Hartmana80be972012-09-13 17:41:50 -0700306 dev_dbg(dev, "%s: nonzero status: %d on endpoint %02x.\n",
307 __func__, status, endpoint);
Matthew Garrett0d456192010-04-01 12:31:07 -0400308 } else {
Jiri Slaby2e124b42013-01-03 15:53:06 +0100309 if (urb->actual_length) {
310 tty_insert_flip_string(&port->port, data,
311 urb->actual_length);
312 tty_flip_buffer_push(&port->port);
313 } else
314 dev_dbg(dev, "%s: empty read urb received\n", __func__);
Matt Burtch6c1ee662013-08-12 10:11:39 -0700315 }
316 /* Resubmit urb so we continue receiving */
317 err = usb_submit_urb(urb, GFP_ATOMIC);
318 if (err) {
Johan Hovoldd2958d12015-08-17 17:35:24 +0200319 if (err != -EPERM && err != -ENODEV) {
Matt Burtch6c1ee662013-08-12 10:11:39 -0700320 dev_err(dev, "%s: resubmit read urb failed. (%d)\n",
321 __func__, err);
322 /* busy also in error unless we are killed */
Dan Carpenterec428992012-04-20 09:33:31 +0300323 usb_mark_last_busy(port->serial->dev);
Matthew Garrett0d456192010-04-01 12:31:07 -0400324 }
Matt Burtch6c1ee662013-08-12 10:11:39 -0700325 } else {
326 usb_mark_last_busy(port->serial->dev);
Matthew Garrett0d456192010-04-01 12:31:07 -0400327 }
Matthew Garrett0d456192010-04-01 12:31:07 -0400328}
329
330static void usb_wwan_outdat_callback(struct urb *urb)
331{
332 struct usb_serial_port *port;
333 struct usb_wwan_port_private *portdata;
334 struct usb_wwan_intf_private *intfdata;
335 int i;
336
Matthew Garrett0d456192010-04-01 12:31:07 -0400337 port = urb->context;
Johan Hovold37357ca2014-05-26 19:23:26 +0200338 intfdata = usb_get_serial_data(port->serial);
Matthew Garrett0d456192010-04-01 12:31:07 -0400339
340 usb_serial_port_softint(port);
341 usb_autopm_put_interface_async(port->serial->interface);
342 portdata = usb_get_serial_port_data(port);
343 spin_lock(&intfdata->susp_lock);
344 intfdata->in_flight--;
345 spin_unlock(&intfdata->susp_lock);
346
347 for (i = 0; i < N_OUT_URB; ++i) {
348 if (portdata->out_urbs[i] == urb) {
Peter Zijlstra4e857c52014-03-17 18:06:10 +0100349 smp_mb__before_atomic();
Matthew Garrett0d456192010-04-01 12:31:07 -0400350 clear_bit(i, &portdata->out_busy);
351 break;
352 }
353 }
354}
355
356int usb_wwan_write_room(struct tty_struct *tty)
357{
358 struct usb_serial_port *port = tty->driver_data;
359 struct usb_wwan_port_private *portdata;
360 int i;
361 int data_len = 0;
362 struct urb *this_urb;
363
364 portdata = usb_get_serial_port_data(port);
365
366 for (i = 0; i < N_OUT_URB; i++) {
367 this_urb = portdata->out_urbs[i];
368 if (this_urb && !test_bit(i, &portdata->out_busy))
369 data_len += OUT_BUFLEN;
370 }
371
Greg Kroah-Hartmana80be972012-09-13 17:41:50 -0700372 dev_dbg(&port->dev, "%s: %d\n", __func__, data_len);
Matthew Garrett0d456192010-04-01 12:31:07 -0400373 return data_len;
374}
375EXPORT_SYMBOL(usb_wwan_write_room);
376
377int usb_wwan_chars_in_buffer(struct tty_struct *tty)
378{
379 struct usb_serial_port *port = tty->driver_data;
380 struct usb_wwan_port_private *portdata;
381 int i;
382 int data_len = 0;
383 struct urb *this_urb;
384
385 portdata = usb_get_serial_port_data(port);
386
387 for (i = 0; i < N_OUT_URB; i++) {
388 this_urb = portdata->out_urbs[i];
389 /* FIXME: This locking is insufficient as this_urb may
390 go unused during the test */
391 if (this_urb && test_bit(i, &portdata->out_busy))
392 data_len += this_urb->transfer_buffer_length;
393 }
Greg Kroah-Hartmana80be972012-09-13 17:41:50 -0700394 dev_dbg(&port->dev, "%s: %d\n", __func__, data_len);
Matthew Garrett0d456192010-04-01 12:31:07 -0400395 return data_len;
396}
397EXPORT_SYMBOL(usb_wwan_chars_in_buffer);
398
399int usb_wwan_open(struct tty_struct *tty, struct usb_serial_port *port)
400{
401 struct usb_wwan_port_private *portdata;
402 struct usb_wwan_intf_private *intfdata;
403 struct usb_serial *serial = port->serial;
404 int i, err;
405 struct urb *urb;
406
407 portdata = usb_get_serial_port_data(port);
Johan Hovold37357ca2014-05-26 19:23:26 +0200408 intfdata = usb_get_serial_data(serial);
Matthew Garrett0d456192010-04-01 12:31:07 -0400409
Johan Hovold9096f1f2014-05-26 19:23:17 +0200410 if (port->interrupt_in_urb) {
411 err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
412 if (err) {
Johan Hovold8bb7ec62014-05-26 19:23:31 +0200413 dev_err(&port->dev, "%s: submit int urb failed: %d\n",
Johan Hovold9096f1f2014-05-26 19:23:17 +0200414 __func__, err);
415 }
416 }
417
Matthew Garrett0d456192010-04-01 12:31:07 -0400418 /* Start reading from the IN endpoint */
419 for (i = 0; i < N_IN_URB; i++) {
420 urb = portdata->in_urbs[i];
421 if (!urb)
422 continue;
423 err = usb_submit_urb(urb, GFP_KERNEL);
424 if (err) {
Johan Hovold8bb7ec62014-05-26 19:23:31 +0200425 dev_err(&port->dev,
426 "%s: submit read urb %d failed: %d\n",
427 __func__, i, err);
Matthew Garrett0d456192010-04-01 12:31:07 -0400428 }
429 }
430
Matthew Garrett0d456192010-04-01 12:31:07 -0400431 spin_lock_irq(&intfdata->susp_lock);
Johan Hovoldc1c01802014-05-26 19:23:20 +0200432 if (++intfdata->open_ports == 1)
433 serial->interface->needs_remote_wakeup = 1;
Matthew Garrett0d456192010-04-01 12:31:07 -0400434 spin_unlock_irq(&intfdata->susp_lock);
Oliver Neukum9a91aed2011-02-10 15:33:37 +0100435 /* this balances a get in the generic USB serial code */
Matthew Garrett0d456192010-04-01 12:31:07 -0400436 usb_autopm_put_interface(serial->interface);
437
438 return 0;
439}
440EXPORT_SYMBOL(usb_wwan_open);
441
Johan Hovold79eed032014-05-26 19:23:16 +0200442static void unbusy_queued_urb(struct urb *urb,
443 struct usb_wwan_port_private *portdata)
444{
445 int i;
446
447 for (i = 0; i < N_OUT_URB; i++) {
448 if (urb == portdata->out_urbs[i]) {
449 clear_bit(i, &portdata->out_busy);
450 break;
451 }
452 }
453}
454
Matthew Garrett0d456192010-04-01 12:31:07 -0400455void usb_wwan_close(struct usb_serial_port *port)
456{
457 int i;
458 struct usb_serial *serial = port->serial;
459 struct usb_wwan_port_private *portdata;
Johan Hovold37357ca2014-05-26 19:23:26 +0200460 struct usb_wwan_intf_private *intfdata = usb_get_serial_data(serial);
Johan Hovold79eed032014-05-26 19:23:16 +0200461 struct urb *urb;
Matthew Garrett0d456192010-04-01 12:31:07 -0400462
Matthew Garrett0d456192010-04-01 12:31:07 -0400463 portdata = usb_get_serial_port_data(port);
464
Johan Hovoldb0a9aa62014-05-26 19:23:32 +0200465 /*
466 * Need to take susp_lock to make sure port is not already being
467 * resumed, but no need to hold it due to ASYNC_INITIALIZED.
468 */
Johan Hovolde6d144b2013-03-21 12:36:37 +0100469 spin_lock_irq(&intfdata->susp_lock);
Johan Hovoldc1c01802014-05-26 19:23:20 +0200470 if (--intfdata->open_ports == 0)
471 serial->interface->needs_remote_wakeup = 0;
Johan Hovolde6d144b2013-03-21 12:36:37 +0100472 spin_unlock_irq(&intfdata->susp_lock);
Matthew Garrett0d456192010-04-01 12:31:07 -0400473
Johan Hovold79eed032014-05-26 19:23:16 +0200474 for (;;) {
475 urb = usb_get_from_anchor(&portdata->delayed);
476 if (!urb)
477 break;
478 unbusy_queued_urb(urb, portdata);
479 usb_autopm_put_interface_async(serial->interface);
480 }
481
Johan Hovolde6d144b2013-03-21 12:36:37 +0100482 for (i = 0; i < N_IN_URB; i++)
483 usb_kill_urb(portdata->in_urbs[i]);
484 for (i = 0; i < N_OUT_URB; i++)
485 usb_kill_urb(portdata->out_urbs[i]);
Johan Hovold9096f1f2014-05-26 19:23:17 +0200486 usb_kill_urb(port->interrupt_in_urb);
Johan Hovolde6d144b2013-03-21 12:36:37 +0100487
Johan Hovolde6d144b2013-03-21 12:36:37 +0100488 usb_autopm_get_interface_no_resume(serial->interface);
Matthew Garrett0d456192010-04-01 12:31:07 -0400489}
490EXPORT_SYMBOL(usb_wwan_close);
491
Johan Hovoldb8f0e822012-10-25 10:29:16 +0200492static struct urb *usb_wwan_setup_urb(struct usb_serial_port *port,
493 int endpoint,
Matthew Garrett0d456192010-04-01 12:31:07 -0400494 int dir, void *ctx, char *buf, int len,
495 void (*callback) (struct urb *))
496{
Johan Hovoldb8f0e822012-10-25 10:29:16 +0200497 struct usb_serial *serial = port->serial;
Matthew Garrett0d456192010-04-01 12:31:07 -0400498 struct urb *urb;
499
Matthew Garrett0d456192010-04-01 12:31:07 -0400500 urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */
Johan Hovold10c642d2013-12-29 19:22:56 +0100501 if (!urb)
Matthew Garrett0d456192010-04-01 12:31:07 -0400502 return NULL;
Matthew Garrett0d456192010-04-01 12:31:07 -0400503
Matthew Garrett0d456192010-04-01 12:31:07 -0400504 usb_fill_bulk_urb(urb, serial->dev,
505 usb_sndbulkpipe(serial->dev, endpoint) | dir,
506 buf, len, callback, ctx);
507
508 return urb;
509}
510
Johan Hovoldb8f0e822012-10-25 10:29:16 +0200511int usb_wwan_port_probe(struct usb_serial_port *port)
Matthew Garrett0d456192010-04-01 12:31:07 -0400512{
Matthew Garrett0d456192010-04-01 12:31:07 -0400513 struct usb_wwan_port_private *portdata;
Johan Hovoldb8f0e822012-10-25 10:29:16 +0200514 struct urb *urb;
Matthew Garrett0d456192010-04-01 12:31:07 -0400515 u8 *buffer;
Johan Hovoldb8f0e822012-10-25 10:29:16 +0200516 int i;
Matthew Garrett0d456192010-04-01 12:31:07 -0400517
Johan Hovoldbd73bd82014-04-03 13:06:46 +0200518 if (!port->bulk_in_size || !port->bulk_out_size)
519 return -ENODEV;
520
Johan Hovoldb8f0e822012-10-25 10:29:16 +0200521 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
522 if (!portdata)
523 return -ENOMEM;
Matthew Garrett0d456192010-04-01 12:31:07 -0400524
Johan Hovoldb8f0e822012-10-25 10:29:16 +0200525 init_usb_anchor(&portdata->delayed);
Matthew Garrett0d456192010-04-01 12:31:07 -0400526
Johan Hovoldb8f0e822012-10-25 10:29:16 +0200527 for (i = 0; i < N_IN_URB; i++) {
528 buffer = (u8 *)__get_free_page(GFP_KERNEL);
529 if (!buffer)
530 goto bail_out_error;
531 portdata->in_buffer[i] = buffer;
Matthew Garrett0d456192010-04-01 12:31:07 -0400532
Johan Hovoldb8f0e822012-10-25 10:29:16 +0200533 urb = usb_wwan_setup_urb(port, port->bulk_in_endpointAddress,
534 USB_DIR_IN, port,
535 buffer, IN_BUFLEN,
536 usb_wwan_indat_callback);
537 portdata->in_urbs[i] = urb;
538 }
Matthew Garrett0d456192010-04-01 12:31:07 -0400539
Johan Hovoldb8f0e822012-10-25 10:29:16 +0200540 for (i = 0; i < N_OUT_URB; i++) {
Johan Hovoldb8f0e822012-10-25 10:29:16 +0200541 buffer = kmalloc(OUT_BUFLEN, GFP_KERNEL);
542 if (!buffer)
543 goto bail_out_error2;
544 portdata->out_buffer[i] = buffer;
545
546 urb = usb_wwan_setup_urb(port, port->bulk_out_endpointAddress,
547 USB_DIR_OUT, port,
548 buffer, OUT_BUFLEN,
549 usb_wwan_outdat_callback);
550 portdata->out_urbs[i] = urb;
551 }
552
553 usb_set_serial_port_data(port, portdata);
554
Matthew Garrett0d456192010-04-01 12:31:07 -0400555 return 0;
556
557bail_out_error2:
Johan Hovoldb8f0e822012-10-25 10:29:16 +0200558 for (i = 0; i < N_OUT_URB; i++) {
559 usb_free_urb(portdata->out_urbs[i]);
560 kfree(portdata->out_buffer[i]);
561 }
Matthew Garrett0d456192010-04-01 12:31:07 -0400562bail_out_error:
Johan Hovoldb8f0e822012-10-25 10:29:16 +0200563 for (i = 0; i < N_IN_URB; i++) {
564 usb_free_urb(portdata->in_urbs[i]);
565 free_page((unsigned long)portdata->in_buffer[i]);
566 }
Matthew Garrett0d456192010-04-01 12:31:07 -0400567 kfree(portdata);
Johan Hovoldb8f0e822012-10-25 10:29:16 +0200568
569 return -ENOMEM;
Matthew Garrett0d456192010-04-01 12:31:07 -0400570}
Johan Hovoldb8f0e822012-10-25 10:29:16 +0200571EXPORT_SYMBOL_GPL(usb_wwan_port_probe);
Matthew Garrett0d456192010-04-01 12:31:07 -0400572
Bjørn Morka1028f02012-07-27 01:11:41 +0200573int usb_wwan_port_remove(struct usb_serial_port *port)
574{
575 int i;
576 struct usb_wwan_port_private *portdata;
577
578 portdata = usb_get_serial_port_data(port);
579 usb_set_serial_port_data(port, NULL);
580
Bjørn Morka1028f02012-07-27 01:11:41 +0200581 for (i = 0; i < N_IN_URB; i++) {
Bjørn Morka1028f02012-07-27 01:11:41 +0200582 usb_free_urb(portdata->in_urbs[i]);
583 free_page((unsigned long)portdata->in_buffer[i]);
584 }
585 for (i = 0; i < N_OUT_URB; i++) {
Bjørn Morka1028f02012-07-27 01:11:41 +0200586 usb_free_urb(portdata->out_urbs[i]);
587 kfree(portdata->out_buffer[i]);
588 }
589
Bjørn Morka1028f02012-07-27 01:11:41 +0200590 kfree(portdata);
Johan Hovold2b4acea2014-05-26 19:23:23 +0200591
Bjørn Morka1028f02012-07-27 01:11:41 +0200592 return 0;
593}
594EXPORT_SYMBOL(usb_wwan_port_remove);
595
596#ifdef CONFIG_PM
Johan Hovoldae75c942014-05-26 19:23:24 +0200597static void stop_urbs(struct usb_serial *serial)
Matthew Garrett0d456192010-04-01 12:31:07 -0400598{
599 int i, j;
600 struct usb_serial_port *port;
601 struct usb_wwan_port_private *portdata;
602
Matthew Garrett0d456192010-04-01 12:31:07 -0400603 for (i = 0; i < serial->num_ports; ++i) {
604 port = serial->port[i];
605 portdata = usb_get_serial_port_data(port);
Bjørn Mork032129c2012-07-27 01:11:43 +0200606 if (!portdata)
607 continue;
Matthew Garrett0d456192010-04-01 12:31:07 -0400608 for (j = 0; j < N_IN_URB; j++)
609 usb_kill_urb(portdata->in_urbs[j]);
610 for (j = 0; j < N_OUT_URB; j++)
611 usb_kill_urb(portdata->out_urbs[j]);
Johan Hovoldae75c942014-05-26 19:23:24 +0200612 usb_kill_urb(port->interrupt_in_urb);
Matthew Garrett0d456192010-04-01 12:31:07 -0400613 }
614}
615
Matthew Garrett0d456192010-04-01 12:31:07 -0400616int usb_wwan_suspend(struct usb_serial *serial, pm_message_t message)
617{
Johan Hovold37357ca2014-05-26 19:23:26 +0200618 struct usb_wwan_intf_private *intfdata = usb_get_serial_data(serial);
Matthew Garrett0d456192010-04-01 12:31:07 -0400619
620 spin_lock_irq(&intfdata->susp_lock);
Johan Hovold170fad92014-05-26 19:23:15 +0200621 if (PMSG_IS_AUTO(message)) {
622 if (intfdata->in_flight) {
623 spin_unlock_irq(&intfdata->susp_lock);
624 return -EBUSY;
625 }
626 }
Matthew Garrett0d456192010-04-01 12:31:07 -0400627 intfdata->suspended = 1;
628 spin_unlock_irq(&intfdata->susp_lock);
Johan Hovold170fad92014-05-26 19:23:15 +0200629
Johan Hovoldae75c942014-05-26 19:23:24 +0200630 stop_urbs(serial);
Matthew Garrett0d456192010-04-01 12:31:07 -0400631
632 return 0;
633}
634EXPORT_SYMBOL(usb_wwan_suspend);
635
Johan Hovold3362c912014-05-26 19:23:27 +0200636/* Caller must hold susp_lock. */
637static int usb_wwan_submit_delayed_urbs(struct usb_serial_port *port)
Matthew Garrett0d456192010-04-01 12:31:07 -0400638{
Johan Hovold7436f412014-05-26 19:23:19 +0200639 struct usb_serial *serial = port->serial;
Johan Hovold37357ca2014-05-26 19:23:26 +0200640 struct usb_wwan_intf_private *data = usb_get_serial_data(serial);
Matthew Garrett0d456192010-04-01 12:31:07 -0400641 struct usb_wwan_port_private *portdata;
642 struct urb *urb;
Johan Hovold7436f412014-05-26 19:23:19 +0200643 int err_count = 0;
644 int err;
Matthew Garrett0d456192010-04-01 12:31:07 -0400645
646 portdata = usb_get_serial_port_data(port);
Johan Hovold37357ca2014-05-26 19:23:26 +0200647
Johan Hovold3362c912014-05-26 19:23:27 +0200648 for (;;) {
649 urb = usb_get_from_anchor(&portdata->delayed);
650 if (!urb)
651 break;
652
Matthew Garrett0d456192010-04-01 12:31:07 -0400653 err = usb_submit_urb(urb, GFP_ATOMIC);
Johan Hovold7436f412014-05-26 19:23:19 +0200654 if (err) {
Johan Hovold3362c912014-05-26 19:23:27 +0200655 dev_err(&port->dev, "%s: submit urb failed: %d\n",
Johan Hovold7436f412014-05-26 19:23:19 +0200656 __func__, err);
657 err_count++;
658 unbusy_queued_urb(urb, portdata);
659 usb_autopm_put_interface_async(serial->interface);
660 continue;
Oliver Neukum16871dc2011-02-10 15:33:29 +0100661 }
Johan Hovold7436f412014-05-26 19:23:19 +0200662 data->in_flight++;
Matthew Garrett0d456192010-04-01 12:31:07 -0400663 }
Johan Hovoldfb7ad4f2014-05-26 19:23:18 +0200664
Johan Hovold7436f412014-05-26 19:23:19 +0200665 if (err_count)
666 return -EIO;
667
668 return 0;
Matthew Garrett0d456192010-04-01 12:31:07 -0400669}
670
671int usb_wwan_resume(struct usb_serial *serial)
672{
673 int i, j;
674 struct usb_serial_port *port;
Johan Hovold37357ca2014-05-26 19:23:26 +0200675 struct usb_wwan_intf_private *intfdata = usb_get_serial_data(serial);
Matthew Garrett0d456192010-04-01 12:31:07 -0400676 struct usb_wwan_port_private *portdata;
677 struct urb *urb;
Johan Hovoldfb7ad4f2014-05-26 19:23:18 +0200678 int err;
679 int err_count = 0;
Matthew Garrett0d456192010-04-01 12:31:07 -0400680
xiao jind9e93c02014-05-26 19:23:14 +0200681 spin_lock_irq(&intfdata->susp_lock);
Matthew Garrett0d456192010-04-01 12:31:07 -0400682 for (i = 0; i < serial->num_ports; i++) {
Matthew Garrett0d456192010-04-01 12:31:07 -0400683 port = serial->port[i];
Matthew Garrett0d456192010-04-01 12:31:07 -0400684
Johan Hovoldb0a9aa62014-05-26 19:23:32 +0200685 if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags))
Matthew Garrett0d456192010-04-01 12:31:07 -0400686 continue;
Matthew Garrett0d456192010-04-01 12:31:07 -0400687
Johan Hovoldb0a9aa62014-05-26 19:23:32 +0200688 portdata = usb_get_serial_port_data(port);
689
Johan Hovold9096f1f2014-05-26 19:23:17 +0200690 if (port->interrupt_in_urb) {
691 err = usb_submit_urb(port->interrupt_in_urb,
692 GFP_ATOMIC);
693 if (err) {
694 dev_err(&port->dev,
695 "%s: submit int urb failed: %d\n",
696 __func__, err);
Johan Hovoldfb7ad4f2014-05-26 19:23:18 +0200697 err_count++;
Johan Hovold9096f1f2014-05-26 19:23:17 +0200698 }
699 }
700
Johan Hovold3362c912014-05-26 19:23:27 +0200701 err = usb_wwan_submit_delayed_urbs(port);
Johan Hovoldfb7ad4f2014-05-26 19:23:18 +0200702 if (err)
703 err_count++;
704
Matthew Garrett0d456192010-04-01 12:31:07 -0400705 for (j = 0; j < N_IN_URB; j++) {
706 urb = portdata->in_urbs[j];
707 err = usb_submit_urb(urb, GFP_ATOMIC);
708 if (err < 0) {
Johan Hovoldb0f9d002014-05-26 19:23:25 +0200709 dev_err(&port->dev,
710 "%s: submit read urb %d failed: %d\n",
711 __func__, i, err);
Johan Hovoldfb7ad4f2014-05-26 19:23:18 +0200712 err_count++;
Matthew Garrett0d456192010-04-01 12:31:07 -0400713 }
714 }
Matthew Garrett0d456192010-04-01 12:31:07 -0400715 }
Matthew Garrett0d456192010-04-01 12:31:07 -0400716 intfdata->suspended = 0;
717 spin_unlock_irq(&intfdata->susp_lock);
Johan Hovoldfb7ad4f2014-05-26 19:23:18 +0200718
719 if (err_count)
720 return -EIO;
721
722 return 0;
Matthew Garrett0d456192010-04-01 12:31:07 -0400723}
724EXPORT_SYMBOL(usb_wwan_resume);
725#endif
726
727MODULE_AUTHOR(DRIVER_AUTHOR);
728MODULE_DESCRIPTION(DRIVER_DESC);
Matthew Garrett0d456192010-04-01 12:31:07 -0400729MODULE_LICENSE("GPL");