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 | ||
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 | ||
58 | void usb_wwan_set_termios(struct tty_struct *tty, | |
59 | struct usb_serial_port *port, | |
60 | struct ktermios *old_termios) | |
61 | { | |
62 | struct usb_wwan_intf_private *intfdata = port->serial->private; | |
63 | ||
0d456194 | 64 | /* Doesn't support option setting */ |
adc8d746 | 65 | tty_termios_copy_hw(&tty->termios, old_termios); |
0d456194 MG |
66 | |
67 | if (intfdata->send_setup) | |
68 | intfdata->send_setup(port); | |
69 | } | |
70 | EXPORT_SYMBOL(usb_wwan_set_termios); | |
71 | ||
60b33c13 | 72 | int usb_wwan_tiocmget(struct tty_struct *tty) |
0d456194 MG |
73 | { |
74 | struct usb_serial_port *port = tty->driver_data; | |
75 | unsigned int value; | |
76 | struct usb_wwan_port_private *portdata; | |
77 | ||
78 | portdata = usb_get_serial_port_data(port); | |
79 | ||
80 | value = ((portdata->rts_state) ? TIOCM_RTS : 0) | | |
81 | ((portdata->dtr_state) ? TIOCM_DTR : 0) | | |
82 | ((portdata->cts_state) ? TIOCM_CTS : 0) | | |
83 | ((portdata->dsr_state) ? TIOCM_DSR : 0) | | |
84 | ((portdata->dcd_state) ? TIOCM_CAR : 0) | | |
85 | ((portdata->ri_state) ? TIOCM_RNG : 0); | |
86 | ||
87 | return value; | |
88 | } | |
89 | EXPORT_SYMBOL(usb_wwan_tiocmget); | |
90 | ||
20b9d177 | 91 | int usb_wwan_tiocmset(struct tty_struct *tty, |
0d456194 MG |
92 | unsigned int set, unsigned int clear) |
93 | { | |
94 | struct usb_serial_port *port = tty->driver_data; | |
95 | struct usb_wwan_port_private *portdata; | |
96 | struct usb_wwan_intf_private *intfdata; | |
97 | ||
98 | portdata = usb_get_serial_port_data(port); | |
99 | intfdata = port->serial->private; | |
100 | ||
101 | if (!intfdata->send_setup) | |
102 | return -EINVAL; | |
103 | ||
104 | /* FIXME: what locks portdata fields ? */ | |
105 | if (set & TIOCM_RTS) | |
106 | portdata->rts_state = 1; | |
107 | if (set & TIOCM_DTR) | |
108 | portdata->dtr_state = 1; | |
109 | ||
110 | if (clear & TIOCM_RTS) | |
111 | portdata->rts_state = 0; | |
112 | if (clear & TIOCM_DTR) | |
113 | portdata->dtr_state = 0; | |
114 | return intfdata->send_setup(port); | |
115 | } | |
116 | EXPORT_SYMBOL(usb_wwan_tiocmset); | |
117 | ||
02303f73 DW |
118 | static int get_serial_info(struct usb_serial_port *port, |
119 | struct serial_struct __user *retinfo) | |
120 | { | |
121 | struct serial_struct tmp; | |
122 | ||
123 | if (!retinfo) | |
124 | return -EFAULT; | |
125 | ||
126 | memset(&tmp, 0, sizeof(tmp)); | |
e5b1e206 | 127 | tmp.line = port->minor; |
1143832e | 128 | tmp.port = port->port_number; |
02303f73 DW |
129 | tmp.baud_base = tty_get_baud_rate(port->port.tty); |
130 | tmp.close_delay = port->port.close_delay / 10; | |
131 | tmp.closing_wait = port->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? | |
132 | ASYNC_CLOSING_WAIT_NONE : | |
133 | port->port.closing_wait / 10; | |
134 | ||
135 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
136 | return -EFAULT; | |
137 | return 0; | |
138 | } | |
139 | ||
140 | static int set_serial_info(struct usb_serial_port *port, | |
141 | struct serial_struct __user *newinfo) | |
142 | { | |
143 | struct serial_struct new_serial; | |
144 | unsigned int closing_wait, close_delay; | |
145 | int retval = 0; | |
146 | ||
147 | if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) | |
148 | return -EFAULT; | |
149 | ||
150 | close_delay = new_serial.close_delay * 10; | |
151 | closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? | |
152 | ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; | |
153 | ||
154 | mutex_lock(&port->port.mutex); | |
155 | ||
156 | if (!capable(CAP_SYS_ADMIN)) { | |
157 | if ((close_delay != port->port.close_delay) || | |
158 | (closing_wait != port->port.closing_wait)) | |
159 | retval = -EPERM; | |
160 | else | |
161 | retval = -EOPNOTSUPP; | |
162 | } else { | |
163 | port->port.close_delay = close_delay; | |
164 | port->port.closing_wait = closing_wait; | |
165 | } | |
166 | ||
167 | mutex_unlock(&port->port.mutex); | |
168 | return retval; | |
169 | } | |
170 | ||
00a0d0d6 | 171 | int usb_wwan_ioctl(struct tty_struct *tty, |
02303f73 DW |
172 | unsigned int cmd, unsigned long arg) |
173 | { | |
174 | struct usb_serial_port *port = tty->driver_data; | |
175 | ||
a80be97d | 176 | dev_dbg(&port->dev, "%s cmd 0x%04x\n", __func__, cmd); |
02303f73 DW |
177 | |
178 | switch (cmd) { | |
179 | case TIOCGSERIAL: | |
180 | return get_serial_info(port, | |
181 | (struct serial_struct __user *) arg); | |
182 | case TIOCSSERIAL: | |
183 | return set_serial_info(port, | |
184 | (struct serial_struct __user *) arg); | |
185 | default: | |
186 | break; | |
187 | } | |
188 | ||
a80be97d | 189 | dev_dbg(&port->dev, "%s arg not supported\n", __func__); |
02303f73 DW |
190 | |
191 | return -ENOIOCTLCMD; | |
192 | } | |
193 | EXPORT_SYMBOL(usb_wwan_ioctl); | |
194 | ||
0d456194 MG |
195 | /* Write */ |
196 | int usb_wwan_write(struct tty_struct *tty, struct usb_serial_port *port, | |
197 | const unsigned char *buf, int count) | |
198 | { | |
199 | struct usb_wwan_port_private *portdata; | |
200 | struct usb_wwan_intf_private *intfdata; | |
201 | int i; | |
202 | int left, todo; | |
203 | struct urb *this_urb = NULL; /* spurious */ | |
204 | int err; | |
205 | unsigned long flags; | |
206 | ||
207 | portdata = usb_get_serial_port_data(port); | |
208 | intfdata = port->serial->private; | |
209 | ||
a80be97d | 210 | dev_dbg(&port->dev, "%s: write (%d chars)\n", __func__, count); |
0d456194 MG |
211 | |
212 | i = 0; | |
213 | left = count; | |
214 | for (i = 0; left > 0 && i < N_OUT_URB; i++) { | |
215 | todo = left; | |
216 | if (todo > OUT_BUFLEN) | |
217 | todo = OUT_BUFLEN; | |
218 | ||
219 | this_urb = portdata->out_urbs[i]; | |
220 | if (test_and_set_bit(i, &portdata->out_busy)) { | |
221 | if (time_before(jiffies, | |
222 | portdata->tx_start_time[i] + 10 * HZ)) | |
223 | continue; | |
224 | usb_unlink_urb(this_urb); | |
225 | continue; | |
226 | } | |
a80be97d GKH |
227 | dev_dbg(&port->dev, "%s: endpoint %d buf %d\n", __func__, |
228 | usb_pipeendpoint(this_urb->pipe), i); | |
0d456194 MG |
229 | |
230 | err = usb_autopm_get_interface_async(port->serial->interface); | |
231 | if (err < 0) | |
232 | break; | |
233 | ||
234 | /* send the data */ | |
235 | memcpy(this_urb->transfer_buffer, buf, todo); | |
236 | this_urb->transfer_buffer_length = todo; | |
237 | ||
238 | spin_lock_irqsave(&intfdata->susp_lock, flags); | |
239 | if (intfdata->suspended) { | |
240 | usb_anchor_urb(this_urb, &portdata->delayed); | |
241 | spin_unlock_irqrestore(&intfdata->susp_lock, flags); | |
242 | } else { | |
243 | intfdata->in_flight++; | |
244 | spin_unlock_irqrestore(&intfdata->susp_lock, flags); | |
245 | err = usb_submit_urb(this_urb, GFP_ATOMIC); | |
246 | if (err) { | |
a80be97d GKH |
247 | dev_dbg(&port->dev, |
248 | "usb_submit_urb %p (write bulk) failed (%d)\n", | |
249 | this_urb, err); | |
0d456194 MG |
250 | clear_bit(i, &portdata->out_busy); |
251 | spin_lock_irqsave(&intfdata->susp_lock, flags); | |
252 | intfdata->in_flight--; | |
253 | spin_unlock_irqrestore(&intfdata->susp_lock, | |
254 | flags); | |
3d06bf15 | 255 | usb_autopm_put_interface_async(port->serial->interface); |
433508ae | 256 | break; |
0d456194 MG |
257 | } |
258 | } | |
259 | ||
260 | portdata->tx_start_time[i] = jiffies; | |
261 | buf += todo; | |
262 | left -= todo; | |
263 | } | |
264 | ||
265 | count -= left; | |
a80be97d | 266 | dev_dbg(&port->dev, "%s: wrote (did %d)\n", __func__, count); |
0d456194 MG |
267 | return count; |
268 | } | |
269 | EXPORT_SYMBOL(usb_wwan_write); | |
270 | ||
271 | static void usb_wwan_indat_callback(struct urb *urb) | |
272 | { | |
273 | int err; | |
274 | int endpoint; | |
275 | struct usb_serial_port *port; | |
a80be97d | 276 | struct device *dev; |
0d456194 MG |
277 | unsigned char *data = urb->transfer_buffer; |
278 | int status = urb->status; | |
279 | ||
0d456194 MG |
280 | endpoint = usb_pipeendpoint(urb->pipe); |
281 | port = urb->context; | |
a80be97d | 282 | dev = &port->dev; |
0d456194 MG |
283 | |
284 | if (status) { | |
a80be97d GKH |
285 | dev_dbg(dev, "%s: nonzero status: %d on endpoint %02x.\n", |
286 | __func__, status, endpoint); | |
0d456194 | 287 | } else { |
2e124b4a JS |
288 | if (urb->actual_length) { |
289 | tty_insert_flip_string(&port->port, data, | |
290 | urb->actual_length); | |
291 | tty_flip_buffer_push(&port->port); | |
292 | } else | |
293 | dev_dbg(dev, "%s: empty read urb received\n", __func__); | |
6c1ee66a MB |
294 | } |
295 | /* Resubmit urb so we continue receiving */ | |
296 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
297 | if (err) { | |
298 | if (err != -EPERM) { | |
299 | dev_err(dev, "%s: resubmit read urb failed. (%d)\n", | |
300 | __func__, err); | |
301 | /* busy also in error unless we are killed */ | |
ec42899c | 302 | usb_mark_last_busy(port->serial->dev); |
0d456194 | 303 | } |
6c1ee66a MB |
304 | } else { |
305 | usb_mark_last_busy(port->serial->dev); | |
0d456194 | 306 | } |
0d456194 MG |
307 | } |
308 | ||
309 | static void usb_wwan_outdat_callback(struct urb *urb) | |
310 | { | |
311 | struct usb_serial_port *port; | |
312 | struct usb_wwan_port_private *portdata; | |
313 | struct usb_wwan_intf_private *intfdata; | |
314 | int i; | |
315 | ||
0d456194 MG |
316 | port = urb->context; |
317 | intfdata = port->serial->private; | |
318 | ||
319 | usb_serial_port_softint(port); | |
320 | usb_autopm_put_interface_async(port->serial->interface); | |
321 | portdata = usb_get_serial_port_data(port); | |
322 | spin_lock(&intfdata->susp_lock); | |
323 | intfdata->in_flight--; | |
324 | spin_unlock(&intfdata->susp_lock); | |
325 | ||
326 | for (i = 0; i < N_OUT_URB; ++i) { | |
327 | if (portdata->out_urbs[i] == urb) { | |
328 | smp_mb__before_clear_bit(); | |
329 | clear_bit(i, &portdata->out_busy); | |
330 | break; | |
331 | } | |
332 | } | |
333 | } | |
334 | ||
335 | int usb_wwan_write_room(struct tty_struct *tty) | |
336 | { | |
337 | struct usb_serial_port *port = tty->driver_data; | |
338 | struct usb_wwan_port_private *portdata; | |
339 | int i; | |
340 | int data_len = 0; | |
341 | struct urb *this_urb; | |
342 | ||
343 | portdata = usb_get_serial_port_data(port); | |
344 | ||
345 | for (i = 0; i < N_OUT_URB; i++) { | |
346 | this_urb = portdata->out_urbs[i]; | |
347 | if (this_urb && !test_bit(i, &portdata->out_busy)) | |
348 | data_len += OUT_BUFLEN; | |
349 | } | |
350 | ||
a80be97d | 351 | dev_dbg(&port->dev, "%s: %d\n", __func__, data_len); |
0d456194 MG |
352 | return data_len; |
353 | } | |
354 | EXPORT_SYMBOL(usb_wwan_write_room); | |
355 | ||
356 | int usb_wwan_chars_in_buffer(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 | /* FIXME: This locking is insufficient as this_urb may | |
369 | go unused during the test */ | |
370 | if (this_urb && test_bit(i, &portdata->out_busy)) | |
371 | data_len += this_urb->transfer_buffer_length; | |
372 | } | |
a80be97d | 373 | dev_dbg(&port->dev, "%s: %d\n", __func__, data_len); |
0d456194 MG |
374 | return data_len; |
375 | } | |
376 | EXPORT_SYMBOL(usb_wwan_chars_in_buffer); | |
377 | ||
378 | int usb_wwan_open(struct tty_struct *tty, struct usb_serial_port *port) | |
379 | { | |
380 | struct usb_wwan_port_private *portdata; | |
381 | struct usb_wwan_intf_private *intfdata; | |
382 | struct usb_serial *serial = port->serial; | |
383 | int i, err; | |
384 | struct urb *urb; | |
385 | ||
386 | portdata = usb_get_serial_port_data(port); | |
387 | intfdata = serial->private; | |
388 | ||
0d456194 MG |
389 | /* Start reading from the IN endpoint */ |
390 | for (i = 0; i < N_IN_URB; i++) { | |
391 | urb = portdata->in_urbs[i]; | |
392 | if (!urb) | |
393 | continue; | |
394 | err = usb_submit_urb(urb, GFP_KERNEL); | |
395 | if (err) { | |
a80be97d GKH |
396 | dev_dbg(&port->dev, "%s: submit urb %d failed (%d) %d\n", |
397 | __func__, i, err, urb->transfer_buffer_length); | |
0d456194 MG |
398 | } |
399 | } | |
400 | ||
401 | if (intfdata->send_setup) | |
402 | intfdata->send_setup(port); | |
403 | ||
404 | serial->interface->needs_remote_wakeup = 1; | |
405 | spin_lock_irq(&intfdata->susp_lock); | |
406 | portdata->opened = 1; | |
407 | spin_unlock_irq(&intfdata->susp_lock); | |
9a91aedc | 408 | /* this balances a get in the generic USB serial code */ |
0d456194 MG |
409 | usb_autopm_put_interface(serial->interface); |
410 | ||
411 | return 0; | |
412 | } | |
413 | EXPORT_SYMBOL(usb_wwan_open); | |
414 | ||
415 | void usb_wwan_close(struct usb_serial_port *port) | |
416 | { | |
417 | int i; | |
418 | struct usb_serial *serial = port->serial; | |
419 | struct usb_wwan_port_private *portdata; | |
420 | struct usb_wwan_intf_private *intfdata = port->serial->private; | |
421 | ||
0d456194 MG |
422 | portdata = usb_get_serial_port_data(port); |
423 | ||
e6d144bc JH |
424 | /* Stop reading/writing urbs */ |
425 | spin_lock_irq(&intfdata->susp_lock); | |
426 | portdata->opened = 0; | |
427 | spin_unlock_irq(&intfdata->susp_lock); | |
428 | ||
429 | for (i = 0; i < N_IN_URB; i++) | |
430 | usb_kill_urb(portdata->in_urbs[i]); | |
431 | for (i = 0; i < N_OUT_URB; i++) | |
432 | usb_kill_urb(portdata->out_urbs[i]); | |
433 | ||
434 | /* balancing - important as an error cannot be handled*/ | |
435 | usb_autopm_get_interface_no_resume(serial->interface); | |
436 | serial->interface->needs_remote_wakeup = 0; | |
0d456194 MG |
437 | } |
438 | EXPORT_SYMBOL(usb_wwan_close); | |
439 | ||
440 | /* Helper functions used by usb_wwan_setup_urbs */ | |
b8f0e820 JH |
441 | static struct urb *usb_wwan_setup_urb(struct usb_serial_port *port, |
442 | int endpoint, | |
0d456194 MG |
443 | int dir, void *ctx, char *buf, int len, |
444 | void (*callback) (struct urb *)) | |
445 | { | |
b8f0e820 | 446 | struct usb_serial *serial = port->serial; |
0d456194 MG |
447 | struct urb *urb; |
448 | ||
0d456194 | 449 | urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */ |
10c642d0 | 450 | if (!urb) |
0d456194 | 451 | return NULL; |
0d456194 MG |
452 | |
453 | /* Fill URB using supplied data. */ | |
454 | usb_fill_bulk_urb(urb, serial->dev, | |
455 | usb_sndbulkpipe(serial->dev, endpoint) | dir, | |
456 | buf, len, callback, ctx); | |
457 | ||
458 | return urb; | |
459 | } | |
460 | ||
b8f0e820 | 461 | int usb_wwan_port_probe(struct usb_serial_port *port) |
0d456194 | 462 | { |
0d456194 | 463 | struct usb_wwan_port_private *portdata; |
b8f0e820 JH |
464 | struct urb *urb; |
465 | u8 *buffer; | |
466 | int err; | |
467 | int i; | |
0d456194 | 468 | |
b8f0e820 JH |
469 | portdata = kzalloc(sizeof(*portdata), GFP_KERNEL); |
470 | if (!portdata) | |
471 | return -ENOMEM; | |
0d456194 | 472 | |
b8f0e820 | 473 | init_usb_anchor(&portdata->delayed); |
0d456194 | 474 | |
b8f0e820 | 475 | for (i = 0; i < N_IN_URB; i++) { |
8e493ca1 JH |
476 | if (!port->bulk_in_size) |
477 | break; | |
478 | ||
b8f0e820 JH |
479 | buffer = (u8 *)__get_free_page(GFP_KERNEL); |
480 | if (!buffer) | |
481 | goto bail_out_error; | |
482 | portdata->in_buffer[i] = buffer; | |
483 | ||
484 | urb = usb_wwan_setup_urb(port, port->bulk_in_endpointAddress, | |
485 | USB_DIR_IN, port, | |
486 | buffer, IN_BUFLEN, | |
487 | usb_wwan_indat_callback); | |
488 | portdata->in_urbs[i] = urb; | |
489 | } | |
0d456194 | 490 | |
b8f0e820 | 491 | for (i = 0; i < N_OUT_URB; i++) { |
8e493ca1 JH |
492 | if (!port->bulk_out_size) |
493 | break; | |
0d456194 | 494 | |
b8f0e820 JH |
495 | buffer = kmalloc(OUT_BUFLEN, GFP_KERNEL); |
496 | if (!buffer) | |
497 | goto bail_out_error2; | |
498 | portdata->out_buffer[i] = buffer; | |
0d456194 | 499 | |
b8f0e820 JH |
500 | urb = usb_wwan_setup_urb(port, port->bulk_out_endpointAddress, |
501 | USB_DIR_OUT, port, | |
502 | buffer, OUT_BUFLEN, | |
503 | usb_wwan_outdat_callback); | |
504 | portdata->out_urbs[i] = urb; | |
505 | } | |
0d456194 | 506 | |
b8f0e820 | 507 | usb_set_serial_port_data(port, portdata); |
0d456194 | 508 | |
b8f0e820 | 509 | if (port->interrupt_in_urb) { |
0d456194 MG |
510 | err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
511 | if (err) | |
a80be97d GKH |
512 | dev_dbg(&port->dev, "%s: submit irq_in urb failed %d\n", |
513 | __func__, err); | |
0d456194 | 514 | } |
b8f0e820 | 515 | |
0d456194 MG |
516 | return 0; |
517 | ||
518 | bail_out_error2: | |
b8f0e820 JH |
519 | for (i = 0; i < N_OUT_URB; i++) { |
520 | usb_free_urb(portdata->out_urbs[i]); | |
521 | kfree(portdata->out_buffer[i]); | |
522 | } | |
0d456194 | 523 | bail_out_error: |
b8f0e820 JH |
524 | for (i = 0; i < N_IN_URB; i++) { |
525 | usb_free_urb(portdata->in_urbs[i]); | |
526 | free_page((unsigned long)portdata->in_buffer[i]); | |
527 | } | |
0d456194 | 528 | kfree(portdata); |
b8f0e820 JH |
529 | |
530 | return -ENOMEM; | |
0d456194 | 531 | } |
b8f0e820 | 532 | EXPORT_SYMBOL_GPL(usb_wwan_port_probe); |
0d456194 | 533 | |
a1028f0a | 534 | int usb_wwan_port_remove(struct usb_serial_port *port) |
0d456194 | 535 | { |
a1028f0a | 536 | int i; |
0d456194 MG |
537 | struct usb_wwan_port_private *portdata; |
538 | ||
a1028f0a BM |
539 | portdata = usb_get_serial_port_data(port); |
540 | usb_set_serial_port_data(port, NULL); | |
541 | ||
542 | /* Stop reading/writing urbs and free them */ | |
543 | for (i = 0; i < N_IN_URB; i++) { | |
544 | usb_kill_urb(portdata->in_urbs[i]); | |
545 | usb_free_urb(portdata->in_urbs[i]); | |
546 | free_page((unsigned long)portdata->in_buffer[i]); | |
547 | } | |
548 | for (i = 0; i < N_OUT_URB; i++) { | |
549 | usb_kill_urb(portdata->out_urbs[i]); | |
550 | usb_free_urb(portdata->out_urbs[i]); | |
551 | kfree(portdata->out_buffer[i]); | |
0d456194 | 552 | } |
0d456194 | 553 | |
a1028f0a BM |
554 | /* Now free port private data */ |
555 | kfree(portdata); | |
556 | return 0; | |
0d456194 | 557 | } |
a1028f0a | 558 | EXPORT_SYMBOL(usb_wwan_port_remove); |
0d456194 | 559 | |
a1028f0a BM |
560 | #ifdef CONFIG_PM |
561 | static void stop_read_write_urbs(struct usb_serial *serial) | |
0d456194 MG |
562 | { |
563 | int i, j; | |
564 | struct usb_serial_port *port; | |
565 | struct usb_wwan_port_private *portdata; | |
566 | ||
a1028f0a | 567 | /* Stop reading/writing urbs */ |
0d456194 MG |
568 | for (i = 0; i < serial->num_ports; ++i) { |
569 | port = serial->port[i]; | |
570 | portdata = usb_get_serial_port_data(port); | |
032129cb BM |
571 | if (!portdata) |
572 | continue; | |
a1028f0a BM |
573 | for (j = 0; j < N_IN_URB; j++) |
574 | usb_kill_urb(portdata->in_urbs[j]); | |
575 | for (j = 0; j < N_OUT_URB; j++) | |
576 | usb_kill_urb(portdata->out_urbs[j]); | |
0d456194 MG |
577 | } |
578 | } | |
0d456194 | 579 | |
0d456194 MG |
580 | int usb_wwan_suspend(struct usb_serial *serial, pm_message_t message) |
581 | { | |
582 | struct usb_wwan_intf_private *intfdata = serial->private; | |
583 | int b; | |
584 | ||
5b1b0b81 | 585 | if (PMSG_IS_AUTO(message)) { |
0d456194 MG |
586 | spin_lock_irq(&intfdata->susp_lock); |
587 | b = intfdata->in_flight; | |
588 | spin_unlock_irq(&intfdata->susp_lock); | |
589 | ||
590 | if (b) | |
591 | return -EBUSY; | |
592 | } | |
593 | ||
594 | spin_lock_irq(&intfdata->susp_lock); | |
595 | intfdata->suspended = 1; | |
596 | spin_unlock_irq(&intfdata->susp_lock); | |
597 | stop_read_write_urbs(serial); | |
598 | ||
599 | return 0; | |
600 | } | |
601 | EXPORT_SYMBOL(usb_wwan_suspend); | |
602 | ||
16871dca ON |
603 | static void unbusy_queued_urb(struct urb *urb, struct usb_wwan_port_private *portdata) |
604 | { | |
605 | int i; | |
606 | ||
607 | for (i = 0; i < N_OUT_URB; i++) { | |
608 | if (urb == portdata->out_urbs[i]) { | |
609 | clear_bit(i, &portdata->out_busy); | |
610 | break; | |
611 | } | |
612 | } | |
613 | } | |
614 | ||
0d456194 MG |
615 | static void play_delayed(struct usb_serial_port *port) |
616 | { | |
617 | struct usb_wwan_intf_private *data; | |
618 | struct usb_wwan_port_private *portdata; | |
619 | struct urb *urb; | |
620 | int err; | |
621 | ||
622 | portdata = usb_get_serial_port_data(port); | |
623 | data = port->serial->private; | |
624 | while ((urb = usb_get_from_anchor(&portdata->delayed))) { | |
625 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
16871dca | 626 | if (!err) { |
0d456194 | 627 | data->in_flight++; |
16871dca ON |
628 | } else { |
629 | /* we have to throw away the rest */ | |
630 | do { | |
631 | unbusy_queued_urb(urb, portdata); | |
97ac01d8 | 632 | usb_autopm_put_interface_no_suspend(port->serial->interface); |
16871dca ON |
633 | } while ((urb = usb_get_from_anchor(&portdata->delayed))); |
634 | break; | |
635 | } | |
0d456194 MG |
636 | } |
637 | } | |
638 | ||
639 | int usb_wwan_resume(struct usb_serial *serial) | |
640 | { | |
641 | int i, j; | |
642 | struct usb_serial_port *port; | |
643 | struct usb_wwan_intf_private *intfdata = serial->private; | |
644 | struct usb_wwan_port_private *portdata; | |
645 | struct urb *urb; | |
646 | int err = 0; | |
647 | ||
0d456194 MG |
648 | /* get the interrupt URBs resubmitted unconditionally */ |
649 | for (i = 0; i < serial->num_ports; i++) { | |
650 | port = serial->port[i]; | |
651 | if (!port->interrupt_in_urb) { | |
a80be97d | 652 | dev_dbg(&port->dev, "%s: No interrupt URB for port\n", __func__); |
0d456194 MG |
653 | continue; |
654 | } | |
655 | err = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO); | |
a80be97d | 656 | dev_dbg(&port->dev, "Submitted interrupt URB for port (result %d)\n", err); |
0d456194 | 657 | if (err < 0) { |
3a1c2a82 GKH |
658 | dev_err(&port->dev, "%s: Error %d for interrupt URB\n", |
659 | __func__, err); | |
0d456194 MG |
660 | goto err_out; |
661 | } | |
662 | } | |
663 | ||
664 | for (i = 0; i < serial->num_ports; i++) { | |
665 | /* walk all ports */ | |
666 | port = serial->port[i]; | |
667 | portdata = usb_get_serial_port_data(port); | |
668 | ||
669 | /* skip closed ports */ | |
670 | spin_lock_irq(&intfdata->susp_lock); | |
032129cb | 671 | if (!portdata || !portdata->opened) { |
0d456194 MG |
672 | spin_unlock_irq(&intfdata->susp_lock); |
673 | continue; | |
674 | } | |
675 | ||
676 | for (j = 0; j < N_IN_URB; j++) { | |
677 | urb = portdata->in_urbs[j]; | |
678 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
679 | if (err < 0) { | |
3a1c2a82 GKH |
680 | dev_err(&port->dev, "%s: Error %d for bulk URB %d\n", |
681 | __func__, err, i); | |
0d456194 MG |
682 | spin_unlock_irq(&intfdata->susp_lock); |
683 | goto err_out; | |
684 | } | |
685 | } | |
686 | play_delayed(port); | |
687 | spin_unlock_irq(&intfdata->susp_lock); | |
688 | } | |
689 | spin_lock_irq(&intfdata->susp_lock); | |
690 | intfdata->suspended = 0; | |
691 | spin_unlock_irq(&intfdata->susp_lock); | |
692 | err_out: | |
693 | return err; | |
694 | } | |
695 | EXPORT_SYMBOL(usb_wwan_resume); | |
696 | #endif | |
697 | ||
698 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
699 | MODULE_DESCRIPTION(DRIVER_DESC); | |
0d456194 | 700 | MODULE_LICENSE("GPL"); |