Commit | Line | Data |
---|---|---|
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 | ||
22 | #define DRIVER_VERSION "v0.7.2" | |
23 | #define DRIVER_AUTHOR "Matthias Urlichs <smurf@smurf.noris.de>" | |
24 | #define DRIVER_DESC "USB Driver for GSM modems" | |
25 | ||
26 | #include <linux/kernel.h> | |
27 | #include <linux/jiffies.h> | |
28 | #include <linux/errno.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/tty.h> | |
31 | #include <linux/tty_flip.h> | |
32 | #include <linux/module.h> | |
33 | #include <linux/bitops.h> | |
66921edd | 34 | #include <linux/uaccess.h> |
0d456194 MG |
35 | #include <linux/usb.h> |
36 | #include <linux/usb/serial.h> | |
02303f73 | 37 | #include <linux/serial.h> |
0d456194 MG |
38 | #include "usb-wwan.h" |
39 | ||
90ab5ee9 | 40 | static bool debug; |
0d456194 MG |
41 | |
42 | void usb_wwan_dtr_rts(struct usb_serial_port *port, int on) | |
43 | { | |
44 | struct usb_serial *serial = port->serial; | |
45 | struct usb_wwan_port_private *portdata; | |
0d456194 MG |
46 | struct usb_wwan_intf_private *intfdata; |
47 | ||
0d456194 MG |
48 | intfdata = port->serial->private; |
49 | ||
50 | if (!intfdata->send_setup) | |
51 | return; | |
52 | ||
53 | portdata = usb_get_serial_port_data(port); | |
54 | mutex_lock(&serial->disc_mutex); | |
55 | portdata->rts_state = on; | |
56 | portdata->dtr_state = on; | |
57 | if (serial->dev) | |
58 | intfdata->send_setup(port); | |
59 | mutex_unlock(&serial->disc_mutex); | |
60 | } | |
61 | EXPORT_SYMBOL(usb_wwan_dtr_rts); | |
62 | ||
63 | void usb_wwan_set_termios(struct tty_struct *tty, | |
64 | struct usb_serial_port *port, | |
65 | struct ktermios *old_termios) | |
66 | { | |
67 | struct usb_wwan_intf_private *intfdata = port->serial->private; | |
68 | ||
0d456194 MG |
69 | /* Doesn't support option setting */ |
70 | tty_termios_copy_hw(tty->termios, old_termios); | |
71 | ||
72 | if (intfdata->send_setup) | |
73 | intfdata->send_setup(port); | |
74 | } | |
75 | EXPORT_SYMBOL(usb_wwan_set_termios); | |
76 | ||
60b33c13 | 77 | int usb_wwan_tiocmget(struct tty_struct *tty) |
0d456194 MG |
78 | { |
79 | struct usb_serial_port *port = tty->driver_data; | |
80 | unsigned int value; | |
81 | struct usb_wwan_port_private *portdata; | |
82 | ||
83 | portdata = usb_get_serial_port_data(port); | |
84 | ||
85 | value = ((portdata->rts_state) ? TIOCM_RTS : 0) | | |
86 | ((portdata->dtr_state) ? TIOCM_DTR : 0) | | |
87 | ((portdata->cts_state) ? TIOCM_CTS : 0) | | |
88 | ((portdata->dsr_state) ? TIOCM_DSR : 0) | | |
89 | ((portdata->dcd_state) ? TIOCM_CAR : 0) | | |
90 | ((portdata->ri_state) ? TIOCM_RNG : 0); | |
91 | ||
92 | return value; | |
93 | } | |
94 | EXPORT_SYMBOL(usb_wwan_tiocmget); | |
95 | ||
20b9d177 | 96 | int usb_wwan_tiocmset(struct tty_struct *tty, |
0d456194 MG |
97 | unsigned int set, unsigned int clear) |
98 | { | |
99 | struct usb_serial_port *port = tty->driver_data; | |
100 | struct usb_wwan_port_private *portdata; | |
101 | struct usb_wwan_intf_private *intfdata; | |
102 | ||
103 | portdata = usb_get_serial_port_data(port); | |
104 | intfdata = port->serial->private; | |
105 | ||
106 | if (!intfdata->send_setup) | |
107 | return -EINVAL; | |
108 | ||
109 | /* FIXME: what locks portdata fields ? */ | |
110 | if (set & TIOCM_RTS) | |
111 | portdata->rts_state = 1; | |
112 | if (set & TIOCM_DTR) | |
113 | portdata->dtr_state = 1; | |
114 | ||
115 | if (clear & TIOCM_RTS) | |
116 | portdata->rts_state = 0; | |
117 | if (clear & TIOCM_DTR) | |
118 | portdata->dtr_state = 0; | |
119 | return intfdata->send_setup(port); | |
120 | } | |
121 | EXPORT_SYMBOL(usb_wwan_tiocmset); | |
122 | ||
02303f73 DW |
123 | static int get_serial_info(struct usb_serial_port *port, |
124 | struct serial_struct __user *retinfo) | |
125 | { | |
126 | struct serial_struct tmp; | |
127 | ||
128 | if (!retinfo) | |
129 | return -EFAULT; | |
130 | ||
131 | memset(&tmp, 0, sizeof(tmp)); | |
132 | tmp.line = port->serial->minor; | |
133 | tmp.port = port->number; | |
134 | tmp.baud_base = tty_get_baud_rate(port->port.tty); | |
135 | tmp.close_delay = port->port.close_delay / 10; | |
136 | tmp.closing_wait = port->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? | |
137 | ASYNC_CLOSING_WAIT_NONE : | |
138 | port->port.closing_wait / 10; | |
139 | ||
140 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
141 | return -EFAULT; | |
142 | return 0; | |
143 | } | |
144 | ||
145 | static int set_serial_info(struct usb_serial_port *port, | |
146 | struct serial_struct __user *newinfo) | |
147 | { | |
148 | struct serial_struct new_serial; | |
149 | unsigned int closing_wait, close_delay; | |
150 | int retval = 0; | |
151 | ||
152 | if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) | |
153 | return -EFAULT; | |
154 | ||
155 | close_delay = new_serial.close_delay * 10; | |
156 | closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? | |
157 | ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; | |
158 | ||
159 | mutex_lock(&port->port.mutex); | |
160 | ||
161 | if (!capable(CAP_SYS_ADMIN)) { | |
162 | if ((close_delay != port->port.close_delay) || | |
163 | (closing_wait != port->port.closing_wait)) | |
164 | retval = -EPERM; | |
165 | else | |
166 | retval = -EOPNOTSUPP; | |
167 | } else { | |
168 | port->port.close_delay = close_delay; | |
169 | port->port.closing_wait = closing_wait; | |
170 | } | |
171 | ||
172 | mutex_unlock(&port->port.mutex); | |
173 | return retval; | |
174 | } | |
175 | ||
00a0d0d6 | 176 | int usb_wwan_ioctl(struct tty_struct *tty, |
02303f73 DW |
177 | unsigned int cmd, unsigned long arg) |
178 | { | |
179 | struct usb_serial_port *port = tty->driver_data; | |
180 | ||
181 | dbg("%s cmd 0x%04x", __func__, cmd); | |
182 | ||
183 | switch (cmd) { | |
184 | case TIOCGSERIAL: | |
185 | return get_serial_info(port, | |
186 | (struct serial_struct __user *) arg); | |
187 | case TIOCSSERIAL: | |
188 | return set_serial_info(port, | |
189 | (struct serial_struct __user *) arg); | |
190 | default: | |
191 | break; | |
192 | } | |
193 | ||
194 | dbg("%s arg not supported", __func__); | |
195 | ||
196 | return -ENOIOCTLCMD; | |
197 | } | |
198 | EXPORT_SYMBOL(usb_wwan_ioctl); | |
199 | ||
0d456194 MG |
200 | /* Write */ |
201 | int usb_wwan_write(struct tty_struct *tty, struct usb_serial_port *port, | |
202 | const unsigned char *buf, int count) | |
203 | { | |
204 | struct usb_wwan_port_private *portdata; | |
205 | struct usb_wwan_intf_private *intfdata; | |
206 | int i; | |
207 | int left, todo; | |
208 | struct urb *this_urb = NULL; /* spurious */ | |
209 | int err; | |
210 | unsigned long flags; | |
211 | ||
212 | portdata = usb_get_serial_port_data(port); | |
213 | intfdata = port->serial->private; | |
214 | ||
215 | dbg("%s: write (%d chars)", __func__, count); | |
216 | ||
217 | i = 0; | |
218 | left = count; | |
219 | for (i = 0; left > 0 && i < N_OUT_URB; i++) { | |
220 | todo = left; | |
221 | if (todo > OUT_BUFLEN) | |
222 | todo = OUT_BUFLEN; | |
223 | ||
224 | this_urb = portdata->out_urbs[i]; | |
225 | if (test_and_set_bit(i, &portdata->out_busy)) { | |
226 | if (time_before(jiffies, | |
227 | portdata->tx_start_time[i] + 10 * HZ)) | |
228 | continue; | |
229 | usb_unlink_urb(this_urb); | |
230 | continue; | |
231 | } | |
232 | dbg("%s: endpoint %d buf %d", __func__, | |
233 | usb_pipeendpoint(this_urb->pipe), i); | |
234 | ||
235 | err = usb_autopm_get_interface_async(port->serial->interface); | |
236 | if (err < 0) | |
237 | break; | |
238 | ||
239 | /* send the data */ | |
240 | memcpy(this_urb->transfer_buffer, buf, todo); | |
241 | this_urb->transfer_buffer_length = todo; | |
242 | ||
243 | spin_lock_irqsave(&intfdata->susp_lock, flags); | |
244 | if (intfdata->suspended) { | |
245 | usb_anchor_urb(this_urb, &portdata->delayed); | |
246 | spin_unlock_irqrestore(&intfdata->susp_lock, flags); | |
247 | } else { | |
248 | intfdata->in_flight++; | |
249 | spin_unlock_irqrestore(&intfdata->susp_lock, flags); | |
250 | err = usb_submit_urb(this_urb, GFP_ATOMIC); | |
251 | if (err) { | |
252 | dbg("usb_submit_urb %p (write bulk) failed " | |
253 | "(%d)", this_urb, err); | |
254 | clear_bit(i, &portdata->out_busy); | |
255 | spin_lock_irqsave(&intfdata->susp_lock, flags); | |
256 | intfdata->in_flight--; | |
257 | spin_unlock_irqrestore(&intfdata->susp_lock, | |
258 | flags); | |
3d06bf15 | 259 | usb_autopm_put_interface_async(port->serial->interface); |
433508ae | 260 | break; |
0d456194 MG |
261 | } |
262 | } | |
263 | ||
264 | portdata->tx_start_time[i] = jiffies; | |
265 | buf += todo; | |
266 | left -= todo; | |
267 | } | |
268 | ||
269 | count -= left; | |
270 | dbg("%s: wrote (did %d)", __func__, count); | |
271 | return count; | |
272 | } | |
273 | EXPORT_SYMBOL(usb_wwan_write); | |
274 | ||
275 | static void usb_wwan_indat_callback(struct urb *urb) | |
276 | { | |
277 | int err; | |
278 | int endpoint; | |
279 | struct usb_serial_port *port; | |
280 | struct tty_struct *tty; | |
281 | unsigned char *data = urb->transfer_buffer; | |
282 | int status = urb->status; | |
283 | ||
0d456194 MG |
284 | endpoint = usb_pipeendpoint(urb->pipe); |
285 | port = urb->context; | |
286 | ||
287 | if (status) { | |
288 | dbg("%s: nonzero status: %d on endpoint %02x.", | |
289 | __func__, status, endpoint); | |
290 | } else { | |
291 | tty = tty_port_tty_get(&port->port); | |
38237fd2 JS |
292 | if (tty) { |
293 | if (urb->actual_length) { | |
294 | tty_insert_flip_string(tty, data, | |
295 | urb->actual_length); | |
296 | tty_flip_buffer_push(tty); | |
297 | } else | |
298 | dbg("%s: empty read urb received", __func__); | |
299 | tty_kref_put(tty); | |
300 | } | |
0d456194 MG |
301 | |
302 | /* Resubmit urb so we continue receiving */ | |
ec42899c DC |
303 | err = usb_submit_urb(urb, GFP_ATOMIC); |
304 | if (err) { | |
305 | if (err != -EPERM) { | |
306 | printk(KERN_ERR "%s: resubmit read urb failed. " | |
307 | "(%d)", __func__, err); | |
308 | /* busy also in error unless we are killed */ | |
0d456194 | 309 | usb_mark_last_busy(port->serial->dev); |
c9c4558f | 310 | } |
ec42899c DC |
311 | } else { |
312 | usb_mark_last_busy(port->serial->dev); | |
0d456194 | 313 | } |
0d456194 | 314 | } |
0d456194 MG |
315 | } |
316 | ||
317 | static void usb_wwan_outdat_callback(struct urb *urb) | |
318 | { | |
319 | struct usb_serial_port *port; | |
320 | struct usb_wwan_port_private *portdata; | |
321 | struct usb_wwan_intf_private *intfdata; | |
322 | int i; | |
323 | ||
0d456194 MG |
324 | port = urb->context; |
325 | intfdata = port->serial->private; | |
326 | ||
327 | usb_serial_port_softint(port); | |
328 | usb_autopm_put_interface_async(port->serial->interface); | |
329 | portdata = usb_get_serial_port_data(port); | |
330 | spin_lock(&intfdata->susp_lock); | |
331 | intfdata->in_flight--; | |
332 | spin_unlock(&intfdata->susp_lock); | |
333 | ||
334 | for (i = 0; i < N_OUT_URB; ++i) { | |
335 | if (portdata->out_urbs[i] == urb) { | |
336 | smp_mb__before_clear_bit(); | |
337 | clear_bit(i, &portdata->out_busy); | |
338 | break; | |
339 | } | |
340 | } | |
341 | } | |
342 | ||
343 | int usb_wwan_write_room(struct tty_struct *tty) | |
344 | { | |
345 | struct usb_serial_port *port = tty->driver_data; | |
346 | struct usb_wwan_port_private *portdata; | |
347 | int i; | |
348 | int data_len = 0; | |
349 | struct urb *this_urb; | |
350 | ||
351 | portdata = usb_get_serial_port_data(port); | |
352 | ||
353 | for (i = 0; i < N_OUT_URB; i++) { | |
354 | this_urb = portdata->out_urbs[i]; | |
355 | if (this_urb && !test_bit(i, &portdata->out_busy)) | |
356 | data_len += OUT_BUFLEN; | |
357 | } | |
358 | ||
359 | dbg("%s: %d", __func__, data_len); | |
360 | return data_len; | |
361 | } | |
362 | EXPORT_SYMBOL(usb_wwan_write_room); | |
363 | ||
364 | int usb_wwan_chars_in_buffer(struct tty_struct *tty) | |
365 | { | |
366 | struct usb_serial_port *port = tty->driver_data; | |
367 | struct usb_wwan_port_private *portdata; | |
368 | int i; | |
369 | int data_len = 0; | |
370 | struct urb *this_urb; | |
371 | ||
372 | portdata = usb_get_serial_port_data(port); | |
373 | ||
374 | for (i = 0; i < N_OUT_URB; i++) { | |
375 | this_urb = portdata->out_urbs[i]; | |
376 | /* FIXME: This locking is insufficient as this_urb may | |
377 | go unused during the test */ | |
378 | if (this_urb && test_bit(i, &portdata->out_busy)) | |
379 | data_len += this_urb->transfer_buffer_length; | |
380 | } | |
381 | dbg("%s: %d", __func__, data_len); | |
382 | return data_len; | |
383 | } | |
384 | EXPORT_SYMBOL(usb_wwan_chars_in_buffer); | |
385 | ||
386 | int usb_wwan_open(struct tty_struct *tty, struct usb_serial_port *port) | |
387 | { | |
388 | struct usb_wwan_port_private *portdata; | |
389 | struct usb_wwan_intf_private *intfdata; | |
390 | struct usb_serial *serial = port->serial; | |
391 | int i, err; | |
392 | struct urb *urb; | |
393 | ||
394 | portdata = usb_get_serial_port_data(port); | |
395 | intfdata = serial->private; | |
396 | ||
0d456194 MG |
397 | /* Start reading from the IN endpoint */ |
398 | for (i = 0; i < N_IN_URB; i++) { | |
399 | urb = portdata->in_urbs[i]; | |
400 | if (!urb) | |
401 | continue; | |
402 | err = usb_submit_urb(urb, GFP_KERNEL); | |
403 | if (err) { | |
404 | dbg("%s: submit urb %d failed (%d) %d", | |
405 | __func__, i, err, urb->transfer_buffer_length); | |
406 | } | |
407 | } | |
408 | ||
409 | if (intfdata->send_setup) | |
410 | intfdata->send_setup(port); | |
411 | ||
412 | serial->interface->needs_remote_wakeup = 1; | |
413 | spin_lock_irq(&intfdata->susp_lock); | |
414 | portdata->opened = 1; | |
415 | spin_unlock_irq(&intfdata->susp_lock); | |
9a91aedc | 416 | /* this balances a get in the generic USB serial code */ |
0d456194 MG |
417 | usb_autopm_put_interface(serial->interface); |
418 | ||
419 | return 0; | |
420 | } | |
421 | EXPORT_SYMBOL(usb_wwan_open); | |
422 | ||
423 | void usb_wwan_close(struct usb_serial_port *port) | |
424 | { | |
425 | int i; | |
426 | struct usb_serial *serial = port->serial; | |
427 | struct usb_wwan_port_private *portdata; | |
428 | struct usb_wwan_intf_private *intfdata = port->serial->private; | |
429 | ||
0d456194 MG |
430 | portdata = usb_get_serial_port_data(port); |
431 | ||
432 | if (serial->dev) { | |
433 | /* Stop reading/writing urbs */ | |
434 | spin_lock_irq(&intfdata->susp_lock); | |
435 | portdata->opened = 0; | |
436 | spin_unlock_irq(&intfdata->susp_lock); | |
437 | ||
438 | for (i = 0; i < N_IN_URB; i++) | |
439 | usb_kill_urb(portdata->in_urbs[i]); | |
440 | for (i = 0; i < N_OUT_URB; i++) | |
441 | usb_kill_urb(portdata->out_urbs[i]); | |
9a91aedc ON |
442 | /* balancing - important as an error cannot be handled*/ |
443 | usb_autopm_get_interface_no_resume(serial->interface); | |
0d456194 MG |
444 | serial->interface->needs_remote_wakeup = 0; |
445 | } | |
446 | } | |
447 | EXPORT_SYMBOL(usb_wwan_close); | |
448 | ||
449 | /* Helper functions used by usb_wwan_setup_urbs */ | |
450 | static struct urb *usb_wwan_setup_urb(struct usb_serial *serial, int endpoint, | |
451 | int dir, void *ctx, char *buf, int len, | |
452 | void (*callback) (struct urb *)) | |
453 | { | |
454 | struct urb *urb; | |
455 | ||
456 | if (endpoint == -1) | |
457 | return NULL; /* endpoint not needed */ | |
458 | ||
459 | urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */ | |
460 | if (urb == NULL) { | |
461 | dbg("%s: alloc for endpoint %d failed.", __func__, endpoint); | |
462 | return NULL; | |
463 | } | |
464 | ||
465 | /* Fill URB using supplied data. */ | |
466 | usb_fill_bulk_urb(urb, serial->dev, | |
467 | usb_sndbulkpipe(serial->dev, endpoint) | dir, | |
468 | buf, len, callback, ctx); | |
469 | ||
470 | return urb; | |
471 | } | |
472 | ||
473 | /* Setup urbs */ | |
474 | static void usb_wwan_setup_urbs(struct usb_serial *serial) | |
475 | { | |
476 | int i, j; | |
477 | struct usb_serial_port *port; | |
478 | struct usb_wwan_port_private *portdata; | |
479 | ||
0d456194 MG |
480 | for (i = 0; i < serial->num_ports; i++) { |
481 | port = serial->port[i]; | |
482 | portdata = usb_get_serial_port_data(port); | |
483 | ||
484 | /* Do indat endpoints first */ | |
485 | for (j = 0; j < N_IN_URB; ++j) { | |
486 | portdata->in_urbs[j] = usb_wwan_setup_urb(serial, | |
487 | port-> | |
488 | bulk_in_endpointAddress, | |
489 | USB_DIR_IN, | |
490 | port, | |
491 | portdata-> | |
492 | in_buffer[j], | |
493 | IN_BUFLEN, | |
494 | usb_wwan_indat_callback); | |
495 | } | |
496 | ||
497 | /* outdat endpoints */ | |
498 | for (j = 0; j < N_OUT_URB; ++j) { | |
499 | portdata->out_urbs[j] = usb_wwan_setup_urb(serial, | |
500 | port-> | |
501 | bulk_out_endpointAddress, | |
502 | USB_DIR_OUT, | |
503 | port, | |
504 | portdata-> | |
505 | out_buffer | |
506 | [j], | |
507 | OUT_BUFLEN, | |
508 | usb_wwan_outdat_callback); | |
509 | } | |
510 | } | |
511 | } | |
512 | ||
513 | int usb_wwan_startup(struct usb_serial *serial) | |
514 | { | |
515 | int i, j, err; | |
516 | struct usb_serial_port *port; | |
517 | struct usb_wwan_port_private *portdata; | |
518 | u8 *buffer; | |
519 | ||
0d456194 MG |
520 | /* Now setup per port private data */ |
521 | for (i = 0; i < serial->num_ports; i++) { | |
522 | port = serial->port[i]; | |
523 | portdata = kzalloc(sizeof(*portdata), GFP_KERNEL); | |
524 | if (!portdata) { | |
525 | dbg("%s: kmalloc for usb_wwan_port_private (%d) failed!.", | |
526 | __func__, i); | |
527 | return 1; | |
528 | } | |
529 | init_usb_anchor(&portdata->delayed); | |
530 | ||
531 | for (j = 0; j < N_IN_URB; j++) { | |
532 | buffer = (u8 *) __get_free_page(GFP_KERNEL); | |
533 | if (!buffer) | |
534 | goto bail_out_error; | |
535 | portdata->in_buffer[j] = buffer; | |
536 | } | |
537 | ||
538 | for (j = 0; j < N_OUT_URB; j++) { | |
539 | buffer = kmalloc(OUT_BUFLEN, GFP_KERNEL); | |
540 | if (!buffer) | |
541 | goto bail_out_error2; | |
542 | portdata->out_buffer[j] = buffer; | |
543 | } | |
544 | ||
545 | usb_set_serial_port_data(port, portdata); | |
546 | ||
547 | if (!port->interrupt_in_urb) | |
548 | continue; | |
549 | err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); | |
550 | if (err) | |
551 | dbg("%s: submit irq_in urb failed %d", __func__, err); | |
552 | } | |
553 | usb_wwan_setup_urbs(serial); | |
554 | return 0; | |
555 | ||
556 | bail_out_error2: | |
557 | for (j = 0; j < N_OUT_URB; j++) | |
558 | kfree(portdata->out_buffer[j]); | |
559 | bail_out_error: | |
560 | for (j = 0; j < N_IN_URB; j++) | |
561 | if (portdata->in_buffer[j]) | |
562 | free_page((unsigned long)portdata->in_buffer[j]); | |
563 | kfree(portdata); | |
564 | return 1; | |
565 | } | |
566 | EXPORT_SYMBOL(usb_wwan_startup); | |
567 | ||
568 | static void stop_read_write_urbs(struct usb_serial *serial) | |
569 | { | |
570 | int i, j; | |
571 | struct usb_serial_port *port; | |
572 | struct usb_wwan_port_private *portdata; | |
573 | ||
574 | /* Stop reading/writing urbs */ | |
575 | for (i = 0; i < serial->num_ports; ++i) { | |
576 | port = serial->port[i]; | |
577 | portdata = usb_get_serial_port_data(port); | |
578 | for (j = 0; j < N_IN_URB; j++) | |
579 | usb_kill_urb(portdata->in_urbs[j]); | |
580 | for (j = 0; j < N_OUT_URB; j++) | |
581 | usb_kill_urb(portdata->out_urbs[j]); | |
582 | } | |
583 | } | |
584 | ||
585 | void usb_wwan_disconnect(struct usb_serial *serial) | |
586 | { | |
0d456194 MG |
587 | stop_read_write_urbs(serial); |
588 | } | |
589 | EXPORT_SYMBOL(usb_wwan_disconnect); | |
590 | ||
591 | void usb_wwan_release(struct usb_serial *serial) | |
592 | { | |
593 | int i, j; | |
594 | struct usb_serial_port *port; | |
595 | struct usb_wwan_port_private *portdata; | |
596 | ||
0d456194 MG |
597 | /* Now free them */ |
598 | for (i = 0; i < serial->num_ports; ++i) { | |
599 | port = serial->port[i]; | |
600 | portdata = usb_get_serial_port_data(port); | |
601 | ||
602 | for (j = 0; j < N_IN_URB; j++) { | |
603 | usb_free_urb(portdata->in_urbs[j]); | |
604 | free_page((unsigned long) | |
605 | portdata->in_buffer[j]); | |
606 | portdata->in_urbs[j] = NULL; | |
607 | } | |
608 | for (j = 0; j < N_OUT_URB; j++) { | |
609 | usb_free_urb(portdata->out_urbs[j]); | |
610 | kfree(portdata->out_buffer[j]); | |
611 | portdata->out_urbs[j] = NULL; | |
612 | } | |
613 | } | |
614 | ||
615 | /* Now free per port private data */ | |
616 | for (i = 0; i < serial->num_ports; i++) { | |
617 | port = serial->port[i]; | |
618 | kfree(usb_get_serial_port_data(port)); | |
619 | } | |
620 | } | |
621 | EXPORT_SYMBOL(usb_wwan_release); | |
622 | ||
623 | #ifdef CONFIG_PM | |
624 | int usb_wwan_suspend(struct usb_serial *serial, pm_message_t message) | |
625 | { | |
626 | struct usb_wwan_intf_private *intfdata = serial->private; | |
627 | int b; | |
628 | ||
5b1b0b81 | 629 | if (PMSG_IS_AUTO(message)) { |
0d456194 MG |
630 | spin_lock_irq(&intfdata->susp_lock); |
631 | b = intfdata->in_flight; | |
632 | spin_unlock_irq(&intfdata->susp_lock); | |
633 | ||
634 | if (b) | |
635 | return -EBUSY; | |
636 | } | |
637 | ||
638 | spin_lock_irq(&intfdata->susp_lock); | |
639 | intfdata->suspended = 1; | |
640 | spin_unlock_irq(&intfdata->susp_lock); | |
641 | stop_read_write_urbs(serial); | |
642 | ||
643 | return 0; | |
644 | } | |
645 | EXPORT_SYMBOL(usb_wwan_suspend); | |
646 | ||
16871dca ON |
647 | static void unbusy_queued_urb(struct urb *urb, struct usb_wwan_port_private *portdata) |
648 | { | |
649 | int i; | |
650 | ||
651 | for (i = 0; i < N_OUT_URB; i++) { | |
652 | if (urb == portdata->out_urbs[i]) { | |
653 | clear_bit(i, &portdata->out_busy); | |
654 | break; | |
655 | } | |
656 | } | |
657 | } | |
658 | ||
0d456194 MG |
659 | static void play_delayed(struct usb_serial_port *port) |
660 | { | |
661 | struct usb_wwan_intf_private *data; | |
662 | struct usb_wwan_port_private *portdata; | |
663 | struct urb *urb; | |
664 | int err; | |
665 | ||
666 | portdata = usb_get_serial_port_data(port); | |
667 | data = port->serial->private; | |
668 | while ((urb = usb_get_from_anchor(&portdata->delayed))) { | |
669 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
16871dca | 670 | if (!err) { |
0d456194 | 671 | data->in_flight++; |
16871dca ON |
672 | } else { |
673 | /* we have to throw away the rest */ | |
674 | do { | |
675 | unbusy_queued_urb(urb, portdata); | |
97ac01d8 | 676 | usb_autopm_put_interface_no_suspend(port->serial->interface); |
16871dca ON |
677 | } while ((urb = usb_get_from_anchor(&portdata->delayed))); |
678 | break; | |
679 | } | |
0d456194 MG |
680 | } |
681 | } | |
682 | ||
683 | int usb_wwan_resume(struct usb_serial *serial) | |
684 | { | |
685 | int i, j; | |
686 | struct usb_serial_port *port; | |
687 | struct usb_wwan_intf_private *intfdata = serial->private; | |
688 | struct usb_wwan_port_private *portdata; | |
689 | struct urb *urb; | |
690 | int err = 0; | |
691 | ||
0d456194 MG |
692 | /* get the interrupt URBs resubmitted unconditionally */ |
693 | for (i = 0; i < serial->num_ports; i++) { | |
694 | port = serial->port[i]; | |
695 | if (!port->interrupt_in_urb) { | |
696 | dbg("%s: No interrupt URB for port %d", __func__, i); | |
697 | continue; | |
698 | } | |
699 | err = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO); | |
700 | dbg("Submitted interrupt URB for port %d (result %d)", i, err); | |
701 | if (err < 0) { | |
3a1c2a82 GKH |
702 | dev_err(&port->dev, "%s: Error %d for interrupt URB\n", |
703 | __func__, err); | |
0d456194 MG |
704 | goto err_out; |
705 | } | |
706 | } | |
707 | ||
708 | for (i = 0; i < serial->num_ports; i++) { | |
709 | /* walk all ports */ | |
710 | port = serial->port[i]; | |
711 | portdata = usb_get_serial_port_data(port); | |
712 | ||
713 | /* skip closed ports */ | |
714 | spin_lock_irq(&intfdata->susp_lock); | |
715 | if (!portdata->opened) { | |
716 | spin_unlock_irq(&intfdata->susp_lock); | |
717 | continue; | |
718 | } | |
719 | ||
720 | for (j = 0; j < N_IN_URB; j++) { | |
721 | urb = portdata->in_urbs[j]; | |
722 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
723 | if (err < 0) { | |
3a1c2a82 GKH |
724 | dev_err(&port->dev, "%s: Error %d for bulk URB %d\n", |
725 | __func__, err, i); | |
0d456194 MG |
726 | spin_unlock_irq(&intfdata->susp_lock); |
727 | goto err_out; | |
728 | } | |
729 | } | |
730 | play_delayed(port); | |
731 | spin_unlock_irq(&intfdata->susp_lock); | |
732 | } | |
733 | spin_lock_irq(&intfdata->susp_lock); | |
734 | intfdata->suspended = 0; | |
735 | spin_unlock_irq(&intfdata->susp_lock); | |
736 | err_out: | |
737 | return err; | |
738 | } | |
739 | EXPORT_SYMBOL(usb_wwan_resume); | |
740 | #endif | |
741 | ||
742 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
743 | MODULE_DESCRIPTION(DRIVER_DESC); | |
744 | MODULE_VERSION(DRIVER_VERSION); | |
745 | MODULE_LICENSE("GPL"); | |
746 | ||
747 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
748 | MODULE_PARM_DESC(debug, "Debug messages"); |