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 | ||
669e729f DW |
39 | /* |
40 | * Generate DTR/RTS signals on the port using the SET_CONTROL_LINE_STATE request | |
41 | * in CDC ACM. | |
42 | */ | |
43 | static 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 | ||
0d456194 MG |
73 | void usb_wwan_dtr_rts(struct usb_serial_port *port, int on) |
74 | { | |
0d456194 | 75 | struct usb_wwan_port_private *portdata; |
0d456194 MG |
76 | struct usb_wwan_intf_private *intfdata; |
77 | ||
37357ca5 | 78 | intfdata = usb_get_serial_data(port->serial); |
0d456194 | 79 | |
669e729f | 80 | if (!intfdata->use_send_setup) |
0d456194 MG |
81 | return; |
82 | ||
83 | portdata = usb_get_serial_port_data(port); | |
b2ca6990 | 84 | /* FIXME: locking */ |
0d456194 MG |
85 | portdata->rts_state = on; |
86 | portdata->dtr_state = on; | |
b2ca6990 | 87 | |
669e729f | 88 | usb_wwan_send_setup(port); |
0d456194 MG |
89 | } |
90 | EXPORT_SYMBOL(usb_wwan_dtr_rts); | |
91 | ||
60b33c13 | 92 | int usb_wwan_tiocmget(struct tty_struct *tty) |
0d456194 MG |
93 | { |
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 | } | |
109 | EXPORT_SYMBOL(usb_wwan_tiocmget); | |
110 | ||
20b9d177 | 111 | int usb_wwan_tiocmset(struct tty_struct *tty, |
0d456194 MG |
112 | 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); | |
37357ca5 | 119 | intfdata = usb_get_serial_data(port->serial); |
0d456194 | 120 | |
669e729f | 121 | if (!intfdata->use_send_setup) |
0d456194 MG |
122 | 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; | |
669e729f | 134 | return usb_wwan_send_setup(port); |
0d456194 MG |
135 | } |
136 | EXPORT_SYMBOL(usb_wwan_tiocmset); | |
137 | ||
02303f73 DW |
138 | static 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)); | |
e5b1e206 | 147 | tmp.line = port->minor; |
1143832e | 148 | tmp.port = port->port_number; |
02303f73 DW |
149 | 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 | ||
160 | static 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 | ||
00a0d0d6 | 191 | int usb_wwan_ioctl(struct tty_struct *tty, |
02303f73 DW |
192 | unsigned int cmd, unsigned long arg) |
193 | { | |
194 | struct usb_serial_port *port = tty->driver_data; | |
195 | ||
a80be97d | 196 | dev_dbg(&port->dev, "%s cmd 0x%04x\n", __func__, cmd); |
02303f73 DW |
197 | |
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 | ||
a80be97d | 209 | dev_dbg(&port->dev, "%s arg not supported\n", __func__); |
02303f73 DW |
210 | |
211 | return -ENOIOCTLCMD; | |
212 | } | |
213 | EXPORT_SYMBOL(usb_wwan_ioctl); | |
214 | ||
0d456194 MG |
215 | int 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); | |
37357ca5 | 227 | intfdata = usb_get_serial_data(port->serial); |
0d456194 | 228 | |
a80be97d | 229 | dev_dbg(&port->dev, "%s: write (%d chars)\n", __func__, count); |
0d456194 MG |
230 | |
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 | } | |
a80be97d GKH |
246 | dev_dbg(&port->dev, "%s: endpoint %d buf %d\n", __func__, |
247 | usb_pipeendpoint(this_urb->pipe), i); | |
0d456194 MG |
248 | |
249 | err = usb_autopm_get_interface_async(port->serial->interface); | |
db090473 | 250 | if (err < 0) { |
251 | clear_bit(i, &portdata->out_busy); | |
0d456194 | 252 | break; |
db090473 | 253 | } |
0d456194 MG |
254 | |
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) { | |
8bb7ec65 JH |
268 | dev_err(&port->dev, |
269 | "%s: submit urb %d failed: %d\n", | |
270 | __func__, i, err); | |
0d456194 MG |
271 | 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); | |
3d06bf15 | 276 | usb_autopm_put_interface_async(port->serial->interface); |
433508ae | 277 | break; |
0d456194 MG |
278 | } |
279 | } | |
280 | ||
281 | portdata->tx_start_time[i] = jiffies; | |
282 | buf += todo; | |
283 | left -= todo; | |
284 | } | |
285 | ||
286 | count -= left; | |
a80be97d | 287 | dev_dbg(&port->dev, "%s: wrote (did %d)\n", __func__, count); |
0d456194 MG |
288 | return count; |
289 | } | |
290 | EXPORT_SYMBOL(usb_wwan_write); | |
291 | ||
292 | static void usb_wwan_indat_callback(struct urb *urb) | |
293 | { | |
294 | int err; | |
295 | int endpoint; | |
296 | struct usb_serial_port *port; | |
a80be97d | 297 | struct device *dev; |
0d456194 MG |
298 | unsigned char *data = urb->transfer_buffer; |
299 | int status = urb->status; | |
300 | ||
0d456194 MG |
301 | endpoint = usb_pipeendpoint(urb->pipe); |
302 | port = urb->context; | |
a80be97d | 303 | dev = &port->dev; |
0d456194 MG |
304 | |
305 | if (status) { | |
a80be97d GKH |
306 | dev_dbg(dev, "%s: nonzero status: %d on endpoint %02x.\n", |
307 | __func__, status, endpoint); | |
0d456194 | 308 | } else { |
2e124b4a JS |
309 | 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__); | |
6c1ee66a MB |
315 | } |
316 | /* Resubmit urb so we continue receiving */ | |
317 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
318 | if (err) { | |
d2958d1b | 319 | if (err != -EPERM && err != -ENODEV) { |
6c1ee66a MB |
320 | dev_err(dev, "%s: resubmit read urb failed. (%d)\n", |
321 | __func__, err); | |
322 | /* busy also in error unless we are killed */ | |
ec42899c | 323 | usb_mark_last_busy(port->serial->dev); |
0d456194 | 324 | } |
6c1ee66a MB |
325 | } else { |
326 | usb_mark_last_busy(port->serial->dev); | |
0d456194 | 327 | } |
0d456194 MG |
328 | } |
329 | ||
330 | static 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 | ||
0d456194 | 337 | port = urb->context; |
37357ca5 | 338 | intfdata = usb_get_serial_data(port->serial); |
0d456194 MG |
339 | |
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) { | |
4e857c58 | 349 | smp_mb__before_atomic(); |
0d456194 MG |
350 | clear_bit(i, &portdata->out_busy); |
351 | break; | |
352 | } | |
353 | } | |
354 | } | |
355 | ||
356 | int 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 | ||
a80be97d | 372 | dev_dbg(&port->dev, "%s: %d\n", __func__, data_len); |
0d456194 MG |
373 | return data_len; |
374 | } | |
375 | EXPORT_SYMBOL(usb_wwan_write_room); | |
376 | ||
377 | int 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 | } | |
a80be97d | 394 | dev_dbg(&port->dev, "%s: %d\n", __func__, data_len); |
0d456194 MG |
395 | return data_len; |
396 | } | |
397 | EXPORT_SYMBOL(usb_wwan_chars_in_buffer); | |
398 | ||
399 | int 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); | |
37357ca5 | 408 | intfdata = usb_get_serial_data(serial); |
0d456194 | 409 | |
9096f1fb JH |
410 | if (port->interrupt_in_urb) { |
411 | err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); | |
412 | if (err) { | |
8bb7ec65 | 413 | dev_err(&port->dev, "%s: submit int urb failed: %d\n", |
9096f1fb JH |
414 | __func__, err); |
415 | } | |
416 | } | |
417 | ||
0d456194 MG |
418 | /* 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) { | |
8bb7ec65 JH |
425 | dev_err(&port->dev, |
426 | "%s: submit read urb %d failed: %d\n", | |
427 | __func__, i, err); | |
0d456194 MG |
428 | } |
429 | } | |
430 | ||
0d456194 | 431 | spin_lock_irq(&intfdata->susp_lock); |
c1c01803 JH |
432 | if (++intfdata->open_ports == 1) |
433 | serial->interface->needs_remote_wakeup = 1; | |
0d456194 | 434 | spin_unlock_irq(&intfdata->susp_lock); |
9a91aedc | 435 | /* this balances a get in the generic USB serial code */ |
0d456194 MG |
436 | usb_autopm_put_interface(serial->interface); |
437 | ||
438 | return 0; | |
439 | } | |
440 | EXPORT_SYMBOL(usb_wwan_open); | |
441 | ||
79eed03e JH |
442 | static 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 | ||
0d456194 MG |
455 | void 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; | |
37357ca5 | 460 | struct usb_wwan_intf_private *intfdata = usb_get_serial_data(serial); |
79eed03e | 461 | struct urb *urb; |
0d456194 | 462 | |
0d456194 MG |
463 | portdata = usb_get_serial_port_data(port); |
464 | ||
b0a9aa6d JH |
465 | /* |
466 | * Need to take susp_lock to make sure port is not already being | |
d41861ca | 467 | * resumed, but no need to hold it due to initialized |
b0a9aa6d | 468 | */ |
e6d144bc | 469 | spin_lock_irq(&intfdata->susp_lock); |
c1c01803 JH |
470 | if (--intfdata->open_ports == 0) |
471 | serial->interface->needs_remote_wakeup = 0; | |
e6d144bc JH |
472 | spin_unlock_irq(&intfdata->susp_lock); |
473 | ||
79eed03e JH |
474 | 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 | ||
e6d144bc JH |
482 | 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]); | |
9096f1fb | 486 | usb_kill_urb(port->interrupt_in_urb); |
e6d144bc | 487 | |
e6d144bc | 488 | usb_autopm_get_interface_no_resume(serial->interface); |
0d456194 MG |
489 | } |
490 | EXPORT_SYMBOL(usb_wwan_close); | |
491 | ||
b8f0e820 JH |
492 | static struct urb *usb_wwan_setup_urb(struct usb_serial_port *port, |
493 | int endpoint, | |
0d456194 MG |
494 | int dir, void *ctx, char *buf, int len, |
495 | void (*callback) (struct urb *)) | |
496 | { | |
b8f0e820 | 497 | struct usb_serial *serial = port->serial; |
0d456194 MG |
498 | struct urb *urb; |
499 | ||
0d456194 | 500 | urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */ |
10c642d0 | 501 | if (!urb) |
0d456194 | 502 | return NULL; |
0d456194 | 503 | |
0d456194 MG |
504 | 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 | ||
b8f0e820 | 511 | int usb_wwan_port_probe(struct usb_serial_port *port) |
0d456194 | 512 | { |
0d456194 | 513 | struct usb_wwan_port_private *portdata; |
b8f0e820 JH |
514 | struct urb *urb; |
515 | u8 *buffer; | |
b8f0e820 | 516 | int i; |
0d456194 | 517 | |
bd73bd88 JH |
518 | if (!port->bulk_in_size || !port->bulk_out_size) |
519 | return -ENODEV; | |
520 | ||
b8f0e820 JH |
521 | portdata = kzalloc(sizeof(*portdata), GFP_KERNEL); |
522 | if (!portdata) | |
523 | return -ENOMEM; | |
0d456194 | 524 | |
b8f0e820 | 525 | init_usb_anchor(&portdata->delayed); |
0d456194 | 526 | |
b8f0e820 JH |
527 | 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; | |
532 | ||
533 | 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 | } | |
0d456194 | 539 | |
b8f0e820 | 540 | for (i = 0; i < N_OUT_URB; i++) { |
b8f0e820 JH |
541 | buffer = kmalloc(OUT_BUFLEN, GFP_KERNEL); |
542 | if (!buffer) | |
543 | goto bail_out_error2; | |
544 | portdata->out_buffer[i] = buffer; | |
0d456194 | 545 | |
b8f0e820 JH |
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 | } | |
0d456194 | 552 | |
b8f0e820 | 553 | usb_set_serial_port_data(port, portdata); |
0d456194 | 554 | |
0d456194 MG |
555 | return 0; |
556 | ||
557 | bail_out_error2: | |
b8f0e820 JH |
558 | for (i = 0; i < N_OUT_URB; i++) { |
559 | usb_free_urb(portdata->out_urbs[i]); | |
560 | kfree(portdata->out_buffer[i]); | |
561 | } | |
0d456194 | 562 | bail_out_error: |
b8f0e820 JH |
563 | 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 | } | |
0d456194 | 567 | kfree(portdata); |
b8f0e820 JH |
568 | |
569 | return -ENOMEM; | |
0d456194 | 570 | } |
b8f0e820 | 571 | EXPORT_SYMBOL_GPL(usb_wwan_port_probe); |
0d456194 | 572 | |
a1028f0a | 573 | int usb_wwan_port_remove(struct usb_serial_port *port) |
0d456194 | 574 | { |
a1028f0a | 575 | int i; |
0d456194 MG |
576 | struct usb_wwan_port_private *portdata; |
577 | ||
a1028f0a BM |
578 | portdata = usb_get_serial_port_data(port); |
579 | usb_set_serial_port_data(port, NULL); | |
580 | ||
a1028f0a | 581 | for (i = 0; i < N_IN_URB; i++) { |
a1028f0a BM |
582 | 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++) { | |
a1028f0a BM |
586 | usb_free_urb(portdata->out_urbs[i]); |
587 | kfree(portdata->out_buffer[i]); | |
0d456194 | 588 | } |
0d456194 | 589 | |
a1028f0a | 590 | kfree(portdata); |
2b4aceab | 591 | |
a1028f0a | 592 | return 0; |
0d456194 | 593 | } |
a1028f0a | 594 | EXPORT_SYMBOL(usb_wwan_port_remove); |
0d456194 | 595 | |
a1028f0a | 596 | #ifdef CONFIG_PM |
ae75c940 | 597 | static void stop_urbs(struct usb_serial *serial) |
0d456194 MG |
598 | { |
599 | int i, j; | |
600 | struct usb_serial_port *port; | |
601 | struct usb_wwan_port_private *portdata; | |
602 | ||
0d456194 MG |
603 | for (i = 0; i < serial->num_ports; ++i) { |
604 | port = serial->port[i]; | |
605 | portdata = usb_get_serial_port_data(port); | |
032129cb BM |
606 | if (!portdata) |
607 | continue; | |
a1028f0a BM |
608 | 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]); | |
ae75c940 | 612 | usb_kill_urb(port->interrupt_in_urb); |
0d456194 MG |
613 | } |
614 | } | |
0d456194 | 615 | |
0d456194 MG |
616 | int usb_wwan_suspend(struct usb_serial *serial, pm_message_t message) |
617 | { | |
37357ca5 | 618 | struct usb_wwan_intf_private *intfdata = usb_get_serial_data(serial); |
0d456194 | 619 | |
170fad9e | 620 | spin_lock_irq(&intfdata->susp_lock); |
5b1b0b81 | 621 | if (PMSG_IS_AUTO(message)) { |
170fad9e JH |
622 | if (intfdata->in_flight) { |
623 | spin_unlock_irq(&intfdata->susp_lock); | |
0d456194 | 624 | return -EBUSY; |
170fad9e | 625 | } |
0d456194 | 626 | } |
0d456194 MG |
627 | intfdata->suspended = 1; |
628 | spin_unlock_irq(&intfdata->susp_lock); | |
170fad9e | 629 | |
ae75c940 | 630 | stop_urbs(serial); |
0d456194 MG |
631 | |
632 | return 0; | |
633 | } | |
634 | EXPORT_SYMBOL(usb_wwan_suspend); | |
635 | ||
3362c91c JH |
636 | /* Caller must hold susp_lock. */ |
637 | static int usb_wwan_submit_delayed_urbs(struct usb_serial_port *port) | |
0d456194 | 638 | { |
7436f412 | 639 | struct usb_serial *serial = port->serial; |
37357ca5 | 640 | struct usb_wwan_intf_private *data = usb_get_serial_data(serial); |
0d456194 MG |
641 | struct usb_wwan_port_private *portdata; |
642 | struct urb *urb; | |
7436f412 JH |
643 | int err_count = 0; |
644 | int err; | |
0d456194 MG |
645 | |
646 | portdata = usb_get_serial_port_data(port); | |
37357ca5 | 647 | |
3362c91c JH |
648 | for (;;) { |
649 | urb = usb_get_from_anchor(&portdata->delayed); | |
650 | if (!urb) | |
651 | break; | |
652 | ||
0d456194 | 653 | err = usb_submit_urb(urb, GFP_ATOMIC); |
7436f412 | 654 | if (err) { |
3362c91c | 655 | dev_err(&port->dev, "%s: submit urb failed: %d\n", |
7436f412 JH |
656 | __func__, err); |
657 | err_count++; | |
658 | unbusy_queued_urb(urb, portdata); | |
659 | usb_autopm_put_interface_async(serial->interface); | |
660 | continue; | |
16871dca | 661 | } |
7436f412 | 662 | data->in_flight++; |
0d456194 | 663 | } |
fb7ad4f9 | 664 | |
7436f412 JH |
665 | if (err_count) |
666 | return -EIO; | |
667 | ||
668 | return 0; | |
0d456194 MG |
669 | } |
670 | ||
671 | int usb_wwan_resume(struct usb_serial *serial) | |
672 | { | |
673 | int i, j; | |
674 | struct usb_serial_port *port; | |
37357ca5 | 675 | struct usb_wwan_intf_private *intfdata = usb_get_serial_data(serial); |
0d456194 MG |
676 | struct usb_wwan_port_private *portdata; |
677 | struct urb *urb; | |
fb7ad4f9 JH |
678 | int err; |
679 | int err_count = 0; | |
0d456194 | 680 | |
d9e93c08 | 681 | spin_lock_irq(&intfdata->susp_lock); |
0d456194 | 682 | for (i = 0; i < serial->num_ports; i++) { |
0d456194 | 683 | port = serial->port[i]; |
0d456194 | 684 | |
d41861ca | 685 | if (!tty_port_initialized(&port->port)) |
0d456194 | 686 | continue; |
0d456194 | 687 | |
b0a9aa6d JH |
688 | portdata = usb_get_serial_port_data(port); |
689 | ||
9096f1fb JH |
690 | 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); | |
fb7ad4f9 | 697 | err_count++; |
9096f1fb JH |
698 | } |
699 | } | |
700 | ||
3362c91c | 701 | err = usb_wwan_submit_delayed_urbs(port); |
fb7ad4f9 JH |
702 | if (err) |
703 | err_count++; | |
704 | ||
0d456194 MG |
705 | 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) { | |
b0f9d003 JH |
709 | dev_err(&port->dev, |
710 | "%s: submit read urb %d failed: %d\n", | |
711 | __func__, i, err); | |
fb7ad4f9 | 712 | err_count++; |
0d456194 MG |
713 | } |
714 | } | |
0d456194 | 715 | } |
0d456194 MG |
716 | intfdata->suspended = 0; |
717 | spin_unlock_irq(&intfdata->susp_lock); | |
fb7ad4f9 JH |
718 | |
719 | if (err_count) | |
720 | return -EIO; | |
721 | ||
722 | return 0; | |
0d456194 MG |
723 | } |
724 | EXPORT_SYMBOL(usb_wwan_resume); | |
725 | #endif | |
726 | ||
727 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
728 | MODULE_DESCRIPTION(DRIVER_DESC); | |
0d456194 | 729 | MODULE_LICENSE("GPL"); |