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Commit | Line | Data |
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0d456194 MG |
1 | /* |
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 | ||
0d456194 MG |
22 | #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> | |
66921edd | 33 | #include <linux/uaccess.h> |
0d456194 MG |
34 | #include <linux/usb.h> |
35 | #include <linux/usb/serial.h> | |
02303f73 | 36 | #include <linux/serial.h> |
0d456194 MG |
37 | #include "usb-wwan.h" |
38 | ||
0d456194 MG |
39 | void usb_wwan_dtr_rts(struct usb_serial_port *port, int on) |
40 | { | |
0d456194 | 41 | struct usb_wwan_port_private *portdata; |
0d456194 MG |
42 | struct usb_wwan_intf_private *intfdata; |
43 | ||
0d456194 MG |
44 | intfdata = port->serial->private; |
45 | ||
46 | if (!intfdata->send_setup) | |
47 | return; | |
48 | ||
49 | portdata = usb_get_serial_port_data(port); | |
b2ca6990 | 50 | /* FIXME: locking */ |
0d456194 MG |
51 | portdata->rts_state = on; |
52 | portdata->dtr_state = on; | |
b2ca6990 JH |
53 | |
54 | intfdata->send_setup(port); | |
0d456194 MG |
55 | } |
56 | EXPORT_SYMBOL(usb_wwan_dtr_rts); | |
57 | ||
60b33c13 | 58 | int usb_wwan_tiocmget(struct tty_struct *tty) |
0d456194 MG |
59 | { |
60 | struct usb_serial_port *port = tty->driver_data; | |
61 | unsigned int value; | |
62 | struct usb_wwan_port_private *portdata; | |
63 | ||
64 | portdata = usb_get_serial_port_data(port); | |
65 | ||
66 | value = ((portdata->rts_state) ? TIOCM_RTS : 0) | | |
67 | ((portdata->dtr_state) ? TIOCM_DTR : 0) | | |
68 | ((portdata->cts_state) ? TIOCM_CTS : 0) | | |
69 | ((portdata->dsr_state) ? TIOCM_DSR : 0) | | |
70 | ((portdata->dcd_state) ? TIOCM_CAR : 0) | | |
71 | ((portdata->ri_state) ? TIOCM_RNG : 0); | |
72 | ||
73 | return value; | |
74 | } | |
75 | EXPORT_SYMBOL(usb_wwan_tiocmget); | |
76 | ||
20b9d177 | 77 | int usb_wwan_tiocmset(struct tty_struct *tty, |
0d456194 MG |
78 | unsigned int set, unsigned int clear) |
79 | { | |
80 | struct usb_serial_port *port = tty->driver_data; | |
81 | struct usb_wwan_port_private *portdata; | |
82 | struct usb_wwan_intf_private *intfdata; | |
83 | ||
84 | portdata = usb_get_serial_port_data(port); | |
85 | intfdata = port->serial->private; | |
86 | ||
87 | if (!intfdata->send_setup) | |
88 | return -EINVAL; | |
89 | ||
90 | /* FIXME: what locks portdata fields ? */ | |
91 | if (set & TIOCM_RTS) | |
92 | portdata->rts_state = 1; | |
93 | if (set & TIOCM_DTR) | |
94 | portdata->dtr_state = 1; | |
95 | ||
96 | if (clear & TIOCM_RTS) | |
97 | portdata->rts_state = 0; | |
98 | if (clear & TIOCM_DTR) | |
99 | portdata->dtr_state = 0; | |
100 | return intfdata->send_setup(port); | |
101 | } | |
102 | EXPORT_SYMBOL(usb_wwan_tiocmset); | |
103 | ||
02303f73 DW |
104 | static int get_serial_info(struct usb_serial_port *port, |
105 | struct serial_struct __user *retinfo) | |
106 | { | |
107 | struct serial_struct tmp; | |
108 | ||
109 | if (!retinfo) | |
110 | return -EFAULT; | |
111 | ||
112 | memset(&tmp, 0, sizeof(tmp)); | |
e5b1e206 | 113 | tmp.line = port->minor; |
1143832e | 114 | tmp.port = port->port_number; |
02303f73 DW |
115 | tmp.baud_base = tty_get_baud_rate(port->port.tty); |
116 | tmp.close_delay = port->port.close_delay / 10; | |
117 | tmp.closing_wait = port->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? | |
118 | ASYNC_CLOSING_WAIT_NONE : | |
119 | port->port.closing_wait / 10; | |
120 | ||
121 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
122 | return -EFAULT; | |
123 | return 0; | |
124 | } | |
125 | ||
126 | static int set_serial_info(struct usb_serial_port *port, | |
127 | struct serial_struct __user *newinfo) | |
128 | { | |
129 | struct serial_struct new_serial; | |
130 | unsigned int closing_wait, close_delay; | |
131 | int retval = 0; | |
132 | ||
133 | if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) | |
134 | return -EFAULT; | |
135 | ||
136 | close_delay = new_serial.close_delay * 10; | |
137 | closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? | |
138 | ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; | |
139 | ||
140 | mutex_lock(&port->port.mutex); | |
141 | ||
142 | if (!capable(CAP_SYS_ADMIN)) { | |
143 | if ((close_delay != port->port.close_delay) || | |
144 | (closing_wait != port->port.closing_wait)) | |
145 | retval = -EPERM; | |
146 | else | |
147 | retval = -EOPNOTSUPP; | |
148 | } else { | |
149 | port->port.close_delay = close_delay; | |
150 | port->port.closing_wait = closing_wait; | |
151 | } | |
152 | ||
153 | mutex_unlock(&port->port.mutex); | |
154 | return retval; | |
155 | } | |
156 | ||
00a0d0d6 | 157 | int usb_wwan_ioctl(struct tty_struct *tty, |
02303f73 DW |
158 | unsigned int cmd, unsigned long arg) |
159 | { | |
160 | struct usb_serial_port *port = tty->driver_data; | |
161 | ||
a80be97d | 162 | dev_dbg(&port->dev, "%s cmd 0x%04x\n", __func__, cmd); |
02303f73 DW |
163 | |
164 | switch (cmd) { | |
165 | case TIOCGSERIAL: | |
166 | return get_serial_info(port, | |
167 | (struct serial_struct __user *) arg); | |
168 | case TIOCSSERIAL: | |
169 | return set_serial_info(port, | |
170 | (struct serial_struct __user *) arg); | |
171 | default: | |
172 | break; | |
173 | } | |
174 | ||
a80be97d | 175 | dev_dbg(&port->dev, "%s arg not supported\n", __func__); |
02303f73 DW |
176 | |
177 | return -ENOIOCTLCMD; | |
178 | } | |
179 | EXPORT_SYMBOL(usb_wwan_ioctl); | |
180 | ||
0d456194 MG |
181 | /* Write */ |
182 | int usb_wwan_write(struct tty_struct *tty, struct usb_serial_port *port, | |
183 | const unsigned char *buf, int count) | |
184 | { | |
185 | struct usb_wwan_port_private *portdata; | |
186 | struct usb_wwan_intf_private *intfdata; | |
187 | int i; | |
188 | int left, todo; | |
189 | struct urb *this_urb = NULL; /* spurious */ | |
190 | int err; | |
191 | unsigned long flags; | |
192 | ||
193 | portdata = usb_get_serial_port_data(port); | |
194 | intfdata = port->serial->private; | |
195 | ||
a80be97d | 196 | dev_dbg(&port->dev, "%s: write (%d chars)\n", __func__, count); |
0d456194 MG |
197 | |
198 | i = 0; | |
199 | left = count; | |
200 | for (i = 0; left > 0 && i < N_OUT_URB; i++) { | |
201 | todo = left; | |
202 | if (todo > OUT_BUFLEN) | |
203 | todo = OUT_BUFLEN; | |
204 | ||
205 | this_urb = portdata->out_urbs[i]; | |
206 | if (test_and_set_bit(i, &portdata->out_busy)) { | |
207 | if (time_before(jiffies, | |
208 | portdata->tx_start_time[i] + 10 * HZ)) | |
209 | continue; | |
210 | usb_unlink_urb(this_urb); | |
211 | continue; | |
212 | } | |
a80be97d GKH |
213 | dev_dbg(&port->dev, "%s: endpoint %d buf %d\n", __func__, |
214 | usb_pipeendpoint(this_urb->pipe), i); | |
0d456194 MG |
215 | |
216 | err = usb_autopm_get_interface_async(port->serial->interface); | |
db090473 | 217 | if (err < 0) { |
218 | clear_bit(i, &portdata->out_busy); | |
0d456194 | 219 | break; |
db090473 | 220 | } |
0d456194 MG |
221 | |
222 | /* send the data */ | |
223 | memcpy(this_urb->transfer_buffer, buf, todo); | |
224 | this_urb->transfer_buffer_length = todo; | |
225 | ||
226 | spin_lock_irqsave(&intfdata->susp_lock, flags); | |
227 | if (intfdata->suspended) { | |
228 | usb_anchor_urb(this_urb, &portdata->delayed); | |
229 | spin_unlock_irqrestore(&intfdata->susp_lock, flags); | |
230 | } else { | |
231 | intfdata->in_flight++; | |
232 | spin_unlock_irqrestore(&intfdata->susp_lock, flags); | |
233 | err = usb_submit_urb(this_urb, GFP_ATOMIC); | |
234 | if (err) { | |
a80be97d GKH |
235 | dev_dbg(&port->dev, |
236 | "usb_submit_urb %p (write bulk) failed (%d)\n", | |
237 | this_urb, err); | |
0d456194 MG |
238 | clear_bit(i, &portdata->out_busy); |
239 | spin_lock_irqsave(&intfdata->susp_lock, flags); | |
240 | intfdata->in_flight--; | |
241 | spin_unlock_irqrestore(&intfdata->susp_lock, | |
242 | flags); | |
3d06bf15 | 243 | usb_autopm_put_interface_async(port->serial->interface); |
433508ae | 244 | break; |
0d456194 MG |
245 | } |
246 | } | |
247 | ||
248 | portdata->tx_start_time[i] = jiffies; | |
249 | buf += todo; | |
250 | left -= todo; | |
251 | } | |
252 | ||
253 | count -= left; | |
a80be97d | 254 | dev_dbg(&port->dev, "%s: wrote (did %d)\n", __func__, count); |
0d456194 MG |
255 | return count; |
256 | } | |
257 | EXPORT_SYMBOL(usb_wwan_write); | |
258 | ||
259 | static void usb_wwan_indat_callback(struct urb *urb) | |
260 | { | |
261 | int err; | |
262 | int endpoint; | |
263 | struct usb_serial_port *port; | |
a80be97d | 264 | struct device *dev; |
0d456194 MG |
265 | unsigned char *data = urb->transfer_buffer; |
266 | int status = urb->status; | |
267 | ||
0d456194 MG |
268 | endpoint = usb_pipeendpoint(urb->pipe); |
269 | port = urb->context; | |
a80be97d | 270 | dev = &port->dev; |
0d456194 MG |
271 | |
272 | if (status) { | |
a80be97d GKH |
273 | dev_dbg(dev, "%s: nonzero status: %d on endpoint %02x.\n", |
274 | __func__, status, endpoint); | |
0d456194 | 275 | } else { |
2e124b4a JS |
276 | if (urb->actual_length) { |
277 | tty_insert_flip_string(&port->port, data, | |
278 | urb->actual_length); | |
279 | tty_flip_buffer_push(&port->port); | |
280 | } else | |
281 | dev_dbg(dev, "%s: empty read urb received\n", __func__); | |
6c1ee66a MB |
282 | } |
283 | /* Resubmit urb so we continue receiving */ | |
284 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
285 | if (err) { | |
286 | if (err != -EPERM) { | |
287 | dev_err(dev, "%s: resubmit read urb failed. (%d)\n", | |
288 | __func__, err); | |
289 | /* busy also in error unless we are killed */ | |
ec42899c | 290 | usb_mark_last_busy(port->serial->dev); |
0d456194 | 291 | } |
6c1ee66a MB |
292 | } else { |
293 | usb_mark_last_busy(port->serial->dev); | |
0d456194 | 294 | } |
0d456194 MG |
295 | } |
296 | ||
297 | static void usb_wwan_outdat_callback(struct urb *urb) | |
298 | { | |
299 | struct usb_serial_port *port; | |
300 | struct usb_wwan_port_private *portdata; | |
301 | struct usb_wwan_intf_private *intfdata; | |
302 | int i; | |
303 | ||
0d456194 MG |
304 | port = urb->context; |
305 | intfdata = port->serial->private; | |
306 | ||
307 | usb_serial_port_softint(port); | |
308 | usb_autopm_put_interface_async(port->serial->interface); | |
309 | portdata = usb_get_serial_port_data(port); | |
310 | spin_lock(&intfdata->susp_lock); | |
311 | intfdata->in_flight--; | |
312 | spin_unlock(&intfdata->susp_lock); | |
313 | ||
314 | for (i = 0; i < N_OUT_URB; ++i) { | |
315 | if (portdata->out_urbs[i] == urb) { | |
316 | smp_mb__before_clear_bit(); | |
317 | clear_bit(i, &portdata->out_busy); | |
318 | break; | |
319 | } | |
320 | } | |
321 | } | |
322 | ||
323 | int usb_wwan_write_room(struct tty_struct *tty) | |
324 | { | |
325 | struct usb_serial_port *port = tty->driver_data; | |
326 | struct usb_wwan_port_private *portdata; | |
327 | int i; | |
328 | int data_len = 0; | |
329 | struct urb *this_urb; | |
330 | ||
331 | portdata = usb_get_serial_port_data(port); | |
332 | ||
333 | for (i = 0; i < N_OUT_URB; i++) { | |
334 | this_urb = portdata->out_urbs[i]; | |
335 | if (this_urb && !test_bit(i, &portdata->out_busy)) | |
336 | data_len += OUT_BUFLEN; | |
337 | } | |
338 | ||
a80be97d | 339 | dev_dbg(&port->dev, "%s: %d\n", __func__, data_len); |
0d456194 MG |
340 | return data_len; |
341 | } | |
342 | EXPORT_SYMBOL(usb_wwan_write_room); | |
343 | ||
344 | int usb_wwan_chars_in_buffer(struct tty_struct *tty) | |
345 | { | |
346 | struct usb_serial_port *port = tty->driver_data; | |
347 | struct usb_wwan_port_private *portdata; | |
348 | int i; | |
349 | int data_len = 0; | |
350 | struct urb *this_urb; | |
351 | ||
352 | portdata = usb_get_serial_port_data(port); | |
353 | ||
354 | for (i = 0; i < N_OUT_URB; i++) { | |
355 | this_urb = portdata->out_urbs[i]; | |
356 | /* FIXME: This locking is insufficient as this_urb may | |
357 | go unused during the test */ | |
358 | if (this_urb && test_bit(i, &portdata->out_busy)) | |
359 | data_len += this_urb->transfer_buffer_length; | |
360 | } | |
a80be97d | 361 | dev_dbg(&port->dev, "%s: %d\n", __func__, data_len); |
0d456194 MG |
362 | return data_len; |
363 | } | |
364 | EXPORT_SYMBOL(usb_wwan_chars_in_buffer); | |
365 | ||
366 | int usb_wwan_open(struct tty_struct *tty, struct usb_serial_port *port) | |
367 | { | |
368 | struct usb_wwan_port_private *portdata; | |
369 | struct usb_wwan_intf_private *intfdata; | |
370 | struct usb_serial *serial = port->serial; | |
371 | int i, err; | |
372 | struct urb *urb; | |
373 | ||
374 | portdata = usb_get_serial_port_data(port); | |
375 | intfdata = serial->private; | |
376 | ||
9096f1fb JH |
377 | if (port->interrupt_in_urb) { |
378 | err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); | |
379 | if (err) { | |
380 | dev_dbg(&port->dev, "%s: submit int urb failed: %d\n", | |
381 | __func__, err); | |
382 | } | |
383 | } | |
384 | ||
0d456194 MG |
385 | /* Start reading from the IN endpoint */ |
386 | for (i = 0; i < N_IN_URB; i++) { | |
387 | urb = portdata->in_urbs[i]; | |
388 | if (!urb) | |
389 | continue; | |
390 | err = usb_submit_urb(urb, GFP_KERNEL); | |
391 | if (err) { | |
a80be97d GKH |
392 | dev_dbg(&port->dev, "%s: submit urb %d failed (%d) %d\n", |
393 | __func__, i, err, urb->transfer_buffer_length); | |
0d456194 MG |
394 | } |
395 | } | |
396 | ||
0d456194 MG |
397 | spin_lock_irq(&intfdata->susp_lock); |
398 | portdata->opened = 1; | |
c1c01803 JH |
399 | if (++intfdata->open_ports == 1) |
400 | serial->interface->needs_remote_wakeup = 1; | |
0d456194 | 401 | spin_unlock_irq(&intfdata->susp_lock); |
9a91aedc | 402 | /* this balances a get in the generic USB serial code */ |
0d456194 MG |
403 | usb_autopm_put_interface(serial->interface); |
404 | ||
405 | return 0; | |
406 | } | |
407 | EXPORT_SYMBOL(usb_wwan_open); | |
408 | ||
79eed03e JH |
409 | static void unbusy_queued_urb(struct urb *urb, |
410 | struct usb_wwan_port_private *portdata) | |
411 | { | |
412 | int i; | |
413 | ||
414 | for (i = 0; i < N_OUT_URB; i++) { | |
415 | if (urb == portdata->out_urbs[i]) { | |
416 | clear_bit(i, &portdata->out_busy); | |
417 | break; | |
418 | } | |
419 | } | |
420 | } | |
421 | ||
0d456194 MG |
422 | void usb_wwan_close(struct usb_serial_port *port) |
423 | { | |
424 | int i; | |
425 | struct usb_serial *serial = port->serial; | |
426 | struct usb_wwan_port_private *portdata; | |
427 | struct usb_wwan_intf_private *intfdata = port->serial->private; | |
79eed03e | 428 | struct urb *urb; |
0d456194 | 429 | |
0d456194 MG |
430 | portdata = usb_get_serial_port_data(port); |
431 | ||
e6d144bc JH |
432 | /* Stop reading/writing urbs */ |
433 | spin_lock_irq(&intfdata->susp_lock); | |
434 | portdata->opened = 0; | |
c1c01803 JH |
435 | if (--intfdata->open_ports == 0) |
436 | serial->interface->needs_remote_wakeup = 0; | |
e6d144bc JH |
437 | spin_unlock_irq(&intfdata->susp_lock); |
438 | ||
79eed03e JH |
439 | for (;;) { |
440 | urb = usb_get_from_anchor(&portdata->delayed); | |
441 | if (!urb) | |
442 | break; | |
443 | unbusy_queued_urb(urb, portdata); | |
444 | usb_autopm_put_interface_async(serial->interface); | |
445 | } | |
446 | ||
e6d144bc JH |
447 | for (i = 0; i < N_IN_URB; i++) |
448 | usb_kill_urb(portdata->in_urbs[i]); | |
449 | for (i = 0; i < N_OUT_URB; i++) | |
450 | usb_kill_urb(portdata->out_urbs[i]); | |
9096f1fb | 451 | usb_kill_urb(port->interrupt_in_urb); |
e6d144bc JH |
452 | |
453 | /* balancing - important as an error cannot be handled*/ | |
454 | usb_autopm_get_interface_no_resume(serial->interface); | |
0d456194 MG |
455 | } |
456 | EXPORT_SYMBOL(usb_wwan_close); | |
457 | ||
458 | /* Helper functions used by usb_wwan_setup_urbs */ | |
b8f0e820 JH |
459 | static struct urb *usb_wwan_setup_urb(struct usb_serial_port *port, |
460 | int endpoint, | |
0d456194 MG |
461 | int dir, void *ctx, char *buf, int len, |
462 | void (*callback) (struct urb *)) | |
463 | { | |
b8f0e820 | 464 | struct usb_serial *serial = port->serial; |
0d456194 MG |
465 | struct urb *urb; |
466 | ||
0d456194 | 467 | urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */ |
10c642d0 | 468 | if (!urb) |
0d456194 | 469 | return NULL; |
0d456194 MG |
470 | |
471 | /* Fill URB using supplied data. */ | |
472 | usb_fill_bulk_urb(urb, serial->dev, | |
473 | usb_sndbulkpipe(serial->dev, endpoint) | dir, | |
474 | buf, len, callback, ctx); | |
475 | ||
476 | return urb; | |
477 | } | |
478 | ||
b8f0e820 | 479 | int usb_wwan_port_probe(struct usb_serial_port *port) |
0d456194 | 480 | { |
0d456194 | 481 | struct usb_wwan_port_private *portdata; |
b8f0e820 JH |
482 | struct urb *urb; |
483 | u8 *buffer; | |
b8f0e820 | 484 | int i; |
0d456194 | 485 | |
bd73bd88 JH |
486 | if (!port->bulk_in_size || !port->bulk_out_size) |
487 | return -ENODEV; | |
488 | ||
b8f0e820 JH |
489 | portdata = kzalloc(sizeof(*portdata), GFP_KERNEL); |
490 | if (!portdata) | |
491 | return -ENOMEM; | |
0d456194 | 492 | |
b8f0e820 | 493 | init_usb_anchor(&portdata->delayed); |
0d456194 | 494 | |
b8f0e820 JH |
495 | for (i = 0; i < N_IN_URB; i++) { |
496 | buffer = (u8 *)__get_free_page(GFP_KERNEL); | |
497 | if (!buffer) | |
498 | goto bail_out_error; | |
499 | portdata->in_buffer[i] = buffer; | |
500 | ||
501 | urb = usb_wwan_setup_urb(port, port->bulk_in_endpointAddress, | |
502 | USB_DIR_IN, port, | |
503 | buffer, IN_BUFLEN, | |
504 | usb_wwan_indat_callback); | |
505 | portdata->in_urbs[i] = urb; | |
506 | } | |
0d456194 | 507 | |
b8f0e820 | 508 | for (i = 0; i < N_OUT_URB; i++) { |
b8f0e820 JH |
509 | buffer = kmalloc(OUT_BUFLEN, GFP_KERNEL); |
510 | if (!buffer) | |
511 | goto bail_out_error2; | |
512 | portdata->out_buffer[i] = buffer; | |
0d456194 | 513 | |
b8f0e820 JH |
514 | urb = usb_wwan_setup_urb(port, port->bulk_out_endpointAddress, |
515 | USB_DIR_OUT, port, | |
516 | buffer, OUT_BUFLEN, | |
517 | usb_wwan_outdat_callback); | |
518 | portdata->out_urbs[i] = urb; | |
519 | } | |
0d456194 | 520 | |
b8f0e820 | 521 | usb_set_serial_port_data(port, portdata); |
0d456194 | 522 | |
0d456194 MG |
523 | return 0; |
524 | ||
525 | bail_out_error2: | |
b8f0e820 JH |
526 | for (i = 0; i < N_OUT_URB; i++) { |
527 | usb_free_urb(portdata->out_urbs[i]); | |
528 | kfree(portdata->out_buffer[i]); | |
529 | } | |
0d456194 | 530 | bail_out_error: |
b8f0e820 JH |
531 | for (i = 0; i < N_IN_URB; i++) { |
532 | usb_free_urb(portdata->in_urbs[i]); | |
533 | free_page((unsigned long)portdata->in_buffer[i]); | |
534 | } | |
0d456194 | 535 | kfree(portdata); |
b8f0e820 JH |
536 | |
537 | return -ENOMEM; | |
0d456194 | 538 | } |
b8f0e820 | 539 | EXPORT_SYMBOL_GPL(usb_wwan_port_probe); |
0d456194 | 540 | |
a1028f0a | 541 | int usb_wwan_port_remove(struct usb_serial_port *port) |
0d456194 | 542 | { |
a1028f0a | 543 | int i; |
0d456194 MG |
544 | struct usb_wwan_port_private *portdata; |
545 | ||
a1028f0a BM |
546 | portdata = usb_get_serial_port_data(port); |
547 | usb_set_serial_port_data(port, NULL); | |
548 | ||
a1028f0a | 549 | for (i = 0; i < N_IN_URB; i++) { |
a1028f0a BM |
550 | usb_free_urb(portdata->in_urbs[i]); |
551 | free_page((unsigned long)portdata->in_buffer[i]); | |
552 | } | |
553 | for (i = 0; i < N_OUT_URB; i++) { | |
a1028f0a BM |
554 | usb_free_urb(portdata->out_urbs[i]); |
555 | kfree(portdata->out_buffer[i]); | |
0d456194 | 556 | } |
0d456194 | 557 | |
a1028f0a | 558 | kfree(portdata); |
2b4aceab | 559 | |
a1028f0a | 560 | return 0; |
0d456194 | 561 | } |
a1028f0a | 562 | EXPORT_SYMBOL(usb_wwan_port_remove); |
0d456194 | 563 | |
a1028f0a | 564 | #ifdef CONFIG_PM |
ae75c940 | 565 | static void stop_urbs(struct usb_serial *serial) |
0d456194 MG |
566 | { |
567 | int i, j; | |
568 | struct usb_serial_port *port; | |
569 | struct usb_wwan_port_private *portdata; | |
570 | ||
a1028f0a | 571 | /* Stop reading/writing urbs */ |
0d456194 MG |
572 | for (i = 0; i < serial->num_ports; ++i) { |
573 | port = serial->port[i]; | |
574 | portdata = usb_get_serial_port_data(port); | |
032129cb BM |
575 | if (!portdata) |
576 | continue; | |
a1028f0a BM |
577 | for (j = 0; j < N_IN_URB; j++) |
578 | usb_kill_urb(portdata->in_urbs[j]); | |
579 | for (j = 0; j < N_OUT_URB; j++) | |
580 | usb_kill_urb(portdata->out_urbs[j]); | |
ae75c940 | 581 | usb_kill_urb(port->interrupt_in_urb); |
0d456194 MG |
582 | } |
583 | } | |
0d456194 | 584 | |
0d456194 MG |
585 | int usb_wwan_suspend(struct usb_serial *serial, pm_message_t message) |
586 | { | |
587 | struct usb_wwan_intf_private *intfdata = serial->private; | |
0d456194 | 588 | |
170fad9e | 589 | spin_lock_irq(&intfdata->susp_lock); |
5b1b0b81 | 590 | if (PMSG_IS_AUTO(message)) { |
170fad9e JH |
591 | if (intfdata->in_flight) { |
592 | spin_unlock_irq(&intfdata->susp_lock); | |
0d456194 | 593 | return -EBUSY; |
170fad9e | 594 | } |
0d456194 | 595 | } |
0d456194 MG |
596 | intfdata->suspended = 1; |
597 | spin_unlock_irq(&intfdata->susp_lock); | |
170fad9e | 598 | |
ae75c940 | 599 | stop_urbs(serial); |
0d456194 MG |
600 | |
601 | return 0; | |
602 | } | |
603 | EXPORT_SYMBOL(usb_wwan_suspend); | |
604 | ||
fb7ad4f9 | 605 | static int play_delayed(struct usb_serial_port *port) |
0d456194 | 606 | { |
7436f412 | 607 | struct usb_serial *serial = port->serial; |
0d456194 MG |
608 | struct usb_wwan_intf_private *data; |
609 | struct usb_wwan_port_private *portdata; | |
610 | struct urb *urb; | |
7436f412 JH |
611 | int err_count = 0; |
612 | int err; | |
0d456194 MG |
613 | |
614 | portdata = usb_get_serial_port_data(port); | |
615 | data = port->serial->private; | |
616 | while ((urb = usb_get_from_anchor(&portdata->delayed))) { | |
617 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
7436f412 JH |
618 | if (err) { |
619 | dev_err(&port->dev, | |
620 | "%s: submit write urb failed: %d\n", | |
621 | __func__, err); | |
622 | err_count++; | |
623 | unbusy_queued_urb(urb, portdata); | |
624 | usb_autopm_put_interface_async(serial->interface); | |
625 | continue; | |
16871dca | 626 | } |
7436f412 | 627 | data->in_flight++; |
0d456194 | 628 | } |
fb7ad4f9 | 629 | |
7436f412 JH |
630 | if (err_count) |
631 | return -EIO; | |
632 | ||
633 | return 0; | |
0d456194 MG |
634 | } |
635 | ||
636 | int usb_wwan_resume(struct usb_serial *serial) | |
637 | { | |
638 | int i, j; | |
639 | struct usb_serial_port *port; | |
640 | struct usb_wwan_intf_private *intfdata = serial->private; | |
641 | struct usb_wwan_port_private *portdata; | |
642 | struct urb *urb; | |
fb7ad4f9 JH |
643 | int err; |
644 | int err_count = 0; | |
0d456194 | 645 | |
d9e93c08 | 646 | spin_lock_irq(&intfdata->susp_lock); |
0d456194 MG |
647 | for (i = 0; i < serial->num_ports; i++) { |
648 | /* walk all ports */ | |
649 | port = serial->port[i]; | |
650 | portdata = usb_get_serial_port_data(port); | |
651 | ||
652 | /* skip closed ports */ | |
d9e93c08 | 653 | if (!portdata || !portdata->opened) |
0d456194 | 654 | continue; |
0d456194 | 655 | |
9096f1fb JH |
656 | if (port->interrupt_in_urb) { |
657 | err = usb_submit_urb(port->interrupt_in_urb, | |
658 | GFP_ATOMIC); | |
659 | if (err) { | |
660 | dev_err(&port->dev, | |
661 | "%s: submit int urb failed: %d\n", | |
662 | __func__, err); | |
fb7ad4f9 | 663 | err_count++; |
9096f1fb JH |
664 | } |
665 | } | |
666 | ||
fb7ad4f9 JH |
667 | err = play_delayed(port); |
668 | if (err) | |
669 | err_count++; | |
670 | ||
0d456194 MG |
671 | for (j = 0; j < N_IN_URB; j++) { |
672 | urb = portdata->in_urbs[j]; | |
673 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
674 | if (err < 0) { | |
3a1c2a82 GKH |
675 | dev_err(&port->dev, "%s: Error %d for bulk URB %d\n", |
676 | __func__, err, i); | |
fb7ad4f9 | 677 | err_count++; |
0d456194 MG |
678 | } |
679 | } | |
0d456194 | 680 | } |
0d456194 MG |
681 | intfdata->suspended = 0; |
682 | spin_unlock_irq(&intfdata->susp_lock); | |
fb7ad4f9 JH |
683 | |
684 | if (err_count) | |
685 | return -EIO; | |
686 | ||
687 | return 0; | |
0d456194 MG |
688 | } |
689 | EXPORT_SYMBOL(usb_wwan_resume); | |
690 | #endif | |
691 | ||
692 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
693 | MODULE_DESCRIPTION(DRIVER_DESC); | |
0d456194 | 694 | MODULE_LICENSE("GPL"); |