1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * cdc-acm.c |
4 | * |
5 | * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> |
6 | * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz> |
7 | * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com> |
8 | * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> |
9 | * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name> |
10 | * Copyright (c) 2005 David Kubicek <dave@awk.cz> |
11 | * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com> |
12 | * |
13 | * USB Abstract Control Model driver for USB modems and ISDN adapters |
14 | * |
15 | * Sponsored by SuSE |
16 | */ |
17 | |
18 | #undef DEBUG |
19 | #undef VERBOSE_DEBUG |
20 | |
21 | #include <linux/kernel.h> |
22 | #include <linux/sched/signal.h> |
23 | #include <linux/errno.h> |
24 | #include <linux/init.h> |
25 | #include <linux/slab.h> |
26 | #include <linux/log2.h> |
27 | #include <linux/tty.h> |
28 | #include <linux/serial.h> |
29 | #include <linux/tty_driver.h> |
30 | #include <linux/tty_flip.h> |
31 | #include <linux/tty_ldisc.h> |
32 | #include <linux/module.h> |
33 | #include <linux/mutex.h> |
34 | #include <linux/uaccess.h> |
35 | #include <linux/usb.h> |
36 | #include <linux/usb/cdc.h> |
37 | #include <asm/byteorder.h> |
38 | #include <asm/unaligned.h> |
39 | #include <linux/idr.h> |
40 | #include <linux/list.h> |
41 | |
42 | #include "cdc-acm.h" |
43 | |
44 | |
45 | #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" |
46 | #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" |
47 | |
48 | static struct usb_driver acm_driver; |
49 | static struct tty_driver *acm_tty_driver; |
50 | |
51 | static DEFINE_IDR(acm_minors); |
52 | static DEFINE_MUTEX(acm_minors_lock); |
53 | |
54 | static void acm_tty_set_termios(struct tty_struct *tty, |
55 | const struct ktermios *termios_old); |
56 | |
57 | /* |
58 | * acm_minors accessors |
59 | */ |
60 | |
61 | /* |
62 | * Look up an ACM structure by minor. If found and not disconnected, increment |
63 | * its refcount and return it with its mutex held. |
64 | */ |
65 | static struct acm *acm_get_by_minor(unsigned int minor) |
66 | { |
67 | struct acm *acm; |
68 | |
69 | mutex_lock(&acm_minors_lock); |
70 | acm = idr_find(&acm_minors, id: minor); |
71 | if (acm) { |
72 | mutex_lock(&acm->mutex); |
73 | if (acm->disconnected) { |
74 | mutex_unlock(lock: &acm->mutex); |
75 | acm = NULL; |
76 | } else { |
77 | tty_port_get(port: &acm->port); |
78 | mutex_unlock(lock: &acm->mutex); |
79 | } |
80 | } |
81 | mutex_unlock(lock: &acm_minors_lock); |
82 | return acm; |
83 | } |
84 | |
85 | /* |
86 | * Try to find an available minor number and if found, associate it with 'acm'. |
87 | */ |
88 | static int acm_alloc_minor(struct acm *acm) |
89 | { |
90 | int minor; |
91 | |
92 | mutex_lock(&acm_minors_lock); |
93 | minor = idr_alloc(&acm_minors, ptr: acm, start: 0, ACM_TTY_MINORS, GFP_KERNEL); |
94 | mutex_unlock(lock: &acm_minors_lock); |
95 | |
96 | return minor; |
97 | } |
98 | |
99 | /* Release the minor number associated with 'acm'. */ |
100 | static void acm_release_minor(struct acm *acm) |
101 | { |
102 | mutex_lock(&acm_minors_lock); |
103 | idr_remove(&acm_minors, id: acm->minor); |
104 | mutex_unlock(lock: &acm_minors_lock); |
105 | } |
106 | |
107 | /* |
108 | * Functions for ACM control messages. |
109 | */ |
110 | |
111 | static int acm_ctrl_msg(struct acm *acm, int request, int value, |
112 | void *buf, int len) |
113 | { |
114 | int retval; |
115 | |
116 | retval = usb_autopm_get_interface(intf: acm->control); |
117 | if (retval) |
118 | return retval; |
119 | |
120 | retval = usb_control_msg(dev: acm->dev, usb_sndctrlpipe(acm->dev, 0), |
121 | request, USB_RT_ACM, value, |
122 | index: acm->control->altsetting[0].desc.bInterfaceNumber, |
123 | data: buf, size: len, USB_CTRL_SET_TIMEOUT); |
124 | |
125 | dev_dbg(&acm->control->dev, |
126 | "%s - rq 0x%02x, val %#x, len %#x, result %d\n" , |
127 | __func__, request, value, len, retval); |
128 | |
129 | usb_autopm_put_interface(intf: acm->control); |
130 | |
131 | return retval < 0 ? retval : 0; |
132 | } |
133 | |
134 | /* devices aren't required to support these requests. |
135 | * the cdc acm descriptor tells whether they do... |
136 | */ |
137 | static inline int acm_set_control(struct acm *acm, int control) |
138 | { |
139 | if (acm->quirks & QUIRK_CONTROL_LINE_STATE) |
140 | return -EOPNOTSUPP; |
141 | |
142 | return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, |
143 | value: control, NULL, len: 0); |
144 | } |
145 | |
146 | #define acm_set_line(acm, line) \ |
147 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) |
148 | #define acm_send_break(acm, ms) \ |
149 | acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) |
150 | |
151 | static void acm_poison_urbs(struct acm *acm) |
152 | { |
153 | int i; |
154 | |
155 | usb_poison_urb(urb: acm->ctrlurb); |
156 | for (i = 0; i < ACM_NW; i++) |
157 | usb_poison_urb(urb: acm->wb[i].urb); |
158 | for (i = 0; i < acm->rx_buflimit; i++) |
159 | usb_poison_urb(urb: acm->read_urbs[i]); |
160 | } |
161 | |
162 | static void acm_unpoison_urbs(struct acm *acm) |
163 | { |
164 | int i; |
165 | |
166 | for (i = 0; i < acm->rx_buflimit; i++) |
167 | usb_unpoison_urb(urb: acm->read_urbs[i]); |
168 | for (i = 0; i < ACM_NW; i++) |
169 | usb_unpoison_urb(urb: acm->wb[i].urb); |
170 | usb_unpoison_urb(urb: acm->ctrlurb); |
171 | } |
172 | |
173 | |
174 | /* |
175 | * Write buffer management. |
176 | * All of these assume proper locks taken by the caller. |
177 | */ |
178 | |
179 | static int acm_wb_alloc(struct acm *acm) |
180 | { |
181 | int i, wbn; |
182 | struct acm_wb *wb; |
183 | |
184 | wbn = 0; |
185 | i = 0; |
186 | for (;;) { |
187 | wb = &acm->wb[wbn]; |
188 | if (!wb->use) { |
189 | wb->use = true; |
190 | wb->len = 0; |
191 | return wbn; |
192 | } |
193 | wbn = (wbn + 1) % ACM_NW; |
194 | if (++i >= ACM_NW) |
195 | return -1; |
196 | } |
197 | } |
198 | |
199 | static int acm_wb_is_avail(struct acm *acm) |
200 | { |
201 | int i, n; |
202 | unsigned long flags; |
203 | |
204 | n = ACM_NW; |
205 | spin_lock_irqsave(&acm->write_lock, flags); |
206 | for (i = 0; i < ACM_NW; i++) |
207 | if(acm->wb[i].use) |
208 | n--; |
209 | spin_unlock_irqrestore(lock: &acm->write_lock, flags); |
210 | return n; |
211 | } |
212 | |
213 | /* |
214 | * Finish write. Caller must hold acm->write_lock |
215 | */ |
216 | static void acm_write_done(struct acm *acm, struct acm_wb *wb) |
217 | { |
218 | wb->use = false; |
219 | acm->transmitting--; |
220 | usb_autopm_put_interface_async(intf: acm->control); |
221 | } |
222 | |
223 | /* |
224 | * Poke write. |
225 | * |
226 | * the caller is responsible for locking |
227 | */ |
228 | |
229 | static int acm_start_wb(struct acm *acm, struct acm_wb *wb) |
230 | { |
231 | int rc; |
232 | |
233 | acm->transmitting++; |
234 | |
235 | wb->urb->transfer_buffer = wb->buf; |
236 | wb->urb->transfer_dma = wb->dmah; |
237 | wb->urb->transfer_buffer_length = wb->len; |
238 | wb->urb->dev = acm->dev; |
239 | |
240 | rc = usb_submit_urb(urb: wb->urb, GFP_ATOMIC); |
241 | if (rc < 0) { |
242 | if (rc != -EPERM) |
243 | dev_err(&acm->data->dev, |
244 | "%s - usb_submit_urb(write bulk) failed: %d\n" , |
245 | __func__, rc); |
246 | acm_write_done(acm, wb); |
247 | } |
248 | return rc; |
249 | } |
250 | |
251 | /* |
252 | * attributes exported through sysfs |
253 | */ |
254 | static ssize_t bmCapabilities_show |
255 | (struct device *dev, struct device_attribute *attr, char *buf) |
256 | { |
257 | struct usb_interface *intf = to_usb_interface(dev); |
258 | struct acm *acm = usb_get_intfdata(intf); |
259 | |
260 | return sprintf(buf, fmt: "%d" , acm->ctrl_caps); |
261 | } |
262 | static DEVICE_ATTR_RO(bmCapabilities); |
263 | |
264 | static ssize_t wCountryCodes_show |
265 | (struct device *dev, struct device_attribute *attr, char *buf) |
266 | { |
267 | struct usb_interface *intf = to_usb_interface(dev); |
268 | struct acm *acm = usb_get_intfdata(intf); |
269 | |
270 | memcpy(buf, acm->country_codes, acm->country_code_size); |
271 | return acm->country_code_size; |
272 | } |
273 | |
274 | static DEVICE_ATTR_RO(wCountryCodes); |
275 | |
276 | static ssize_t iCountryCodeRelDate_show |
277 | (struct device *dev, struct device_attribute *attr, char *buf) |
278 | { |
279 | struct usb_interface *intf = to_usb_interface(dev); |
280 | struct acm *acm = usb_get_intfdata(intf); |
281 | |
282 | return sprintf(buf, fmt: "%d" , acm->country_rel_date); |
283 | } |
284 | |
285 | static DEVICE_ATTR_RO(iCountryCodeRelDate); |
286 | /* |
287 | * Interrupt handlers for various ACM device responses |
288 | */ |
289 | |
290 | static void acm_process_notification(struct acm *acm, unsigned char *buf) |
291 | { |
292 | int newctrl; |
293 | int difference; |
294 | unsigned long flags; |
295 | struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf; |
296 | unsigned char *data = buf + sizeof(struct usb_cdc_notification); |
297 | |
298 | switch (dr->bNotificationType) { |
299 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: |
300 | dev_dbg(&acm->control->dev, |
301 | "%s - network connection: %d\n" , __func__, dr->wValue); |
302 | break; |
303 | |
304 | case USB_CDC_NOTIFY_SERIAL_STATE: |
305 | if (le16_to_cpu(dr->wLength) != 2) { |
306 | dev_dbg(&acm->control->dev, |
307 | "%s - malformed serial state\n" , __func__); |
308 | break; |
309 | } |
310 | |
311 | newctrl = get_unaligned_le16(p: data); |
312 | dev_dbg(&acm->control->dev, |
313 | "%s - serial state: 0x%x\n" , __func__, newctrl); |
314 | |
315 | if (!acm->clocal && (acm->ctrlin & ~newctrl & USB_CDC_SERIAL_STATE_DCD)) { |
316 | dev_dbg(&acm->control->dev, |
317 | "%s - calling hangup\n" , __func__); |
318 | tty_port_tty_hangup(port: &acm->port, check_clocal: false); |
319 | } |
320 | |
321 | difference = acm->ctrlin ^ newctrl; |
322 | |
323 | if ((difference & USB_CDC_SERIAL_STATE_DCD) && acm->port.tty) { |
324 | struct tty_ldisc *ld = tty_ldisc_ref(acm->port.tty); |
325 | if (ld) { |
326 | if (ld->ops->dcd_change) |
327 | ld->ops->dcd_change(acm->port.tty, newctrl & USB_CDC_SERIAL_STATE_DCD); |
328 | tty_ldisc_deref(ld); |
329 | } |
330 | } |
331 | |
332 | spin_lock_irqsave(&acm->read_lock, flags); |
333 | acm->ctrlin = newctrl; |
334 | acm->oldcount = acm->iocount; |
335 | |
336 | if (difference & USB_CDC_SERIAL_STATE_DSR) |
337 | acm->iocount.dsr++; |
338 | if (difference & USB_CDC_SERIAL_STATE_DCD) |
339 | acm->iocount.dcd++; |
340 | if (newctrl & USB_CDC_SERIAL_STATE_BREAK) { |
341 | acm->iocount.brk++; |
342 | tty_insert_flip_char(port: &acm->port, ch: 0, TTY_BREAK); |
343 | } |
344 | if (newctrl & USB_CDC_SERIAL_STATE_RING_SIGNAL) |
345 | acm->iocount.rng++; |
346 | if (newctrl & USB_CDC_SERIAL_STATE_FRAMING) |
347 | acm->iocount.frame++; |
348 | if (newctrl & USB_CDC_SERIAL_STATE_PARITY) |
349 | acm->iocount.parity++; |
350 | if (newctrl & USB_CDC_SERIAL_STATE_OVERRUN) |
351 | acm->iocount.overrun++; |
352 | spin_unlock_irqrestore(lock: &acm->read_lock, flags); |
353 | |
354 | if (newctrl & USB_CDC_SERIAL_STATE_BREAK) |
355 | tty_flip_buffer_push(port: &acm->port); |
356 | |
357 | if (difference) |
358 | wake_up_all(&acm->wioctl); |
359 | |
360 | break; |
361 | |
362 | default: |
363 | dev_dbg(&acm->control->dev, |
364 | "%s - unknown notification %d received: index %d len %d\n" , |
365 | __func__, |
366 | dr->bNotificationType, dr->wIndex, dr->wLength); |
367 | } |
368 | } |
369 | |
370 | /* control interface reports status changes with "interrupt" transfers */ |
371 | static void acm_ctrl_irq(struct urb *urb) |
372 | { |
373 | struct acm *acm = urb->context; |
374 | struct usb_cdc_notification *dr = urb->transfer_buffer; |
375 | unsigned int current_size = urb->actual_length; |
376 | unsigned int expected_size, copy_size, alloc_size; |
377 | int retval; |
378 | int status = urb->status; |
379 | |
380 | switch (status) { |
381 | case 0: |
382 | /* success */ |
383 | break; |
384 | case -ECONNRESET: |
385 | case -ENOENT: |
386 | case -ESHUTDOWN: |
387 | /* this urb is terminated, clean up */ |
388 | dev_dbg(&acm->control->dev, |
389 | "%s - urb shutting down with status: %d\n" , |
390 | __func__, status); |
391 | return; |
392 | default: |
393 | dev_dbg(&acm->control->dev, |
394 | "%s - nonzero urb status received: %d\n" , |
395 | __func__, status); |
396 | goto exit; |
397 | } |
398 | |
399 | usb_mark_last_busy(udev: acm->dev); |
400 | |
401 | if (acm->nb_index) |
402 | dr = (struct usb_cdc_notification *)acm->notification_buffer; |
403 | |
404 | /* size = notification-header + (optional) data */ |
405 | expected_size = sizeof(struct usb_cdc_notification) + |
406 | le16_to_cpu(dr->wLength); |
407 | |
408 | if (current_size < expected_size) { |
409 | /* notification is transmitted fragmented, reassemble */ |
410 | if (acm->nb_size < expected_size) { |
411 | u8 *new_buffer; |
412 | alloc_size = roundup_pow_of_two(expected_size); |
413 | /* Final freeing is done on disconnect. */ |
414 | new_buffer = krealloc(objp: acm->notification_buffer, |
415 | new_size: alloc_size, GFP_ATOMIC); |
416 | if (!new_buffer) { |
417 | acm->nb_index = 0; |
418 | goto exit; |
419 | } |
420 | |
421 | acm->notification_buffer = new_buffer; |
422 | acm->nb_size = alloc_size; |
423 | dr = (struct usb_cdc_notification *)acm->notification_buffer; |
424 | } |
425 | |
426 | copy_size = min(current_size, |
427 | expected_size - acm->nb_index); |
428 | |
429 | memcpy(&acm->notification_buffer[acm->nb_index], |
430 | urb->transfer_buffer, copy_size); |
431 | acm->nb_index += copy_size; |
432 | current_size = acm->nb_index; |
433 | } |
434 | |
435 | if (current_size >= expected_size) { |
436 | /* notification complete */ |
437 | acm_process_notification(acm, buf: (unsigned char *)dr); |
438 | acm->nb_index = 0; |
439 | } |
440 | |
441 | exit: |
442 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
443 | if (retval && retval != -EPERM && retval != -ENODEV) |
444 | dev_err(&acm->control->dev, |
445 | "%s - usb_submit_urb failed: %d\n" , __func__, retval); |
446 | else |
447 | dev_vdbg(&acm->control->dev, |
448 | "control resubmission terminated %d\n" , retval); |
449 | } |
450 | |
451 | static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) |
452 | { |
453 | int res; |
454 | |
455 | if (!test_and_clear_bit(nr: index, addr: &acm->read_urbs_free)) |
456 | return 0; |
457 | |
458 | res = usb_submit_urb(urb: acm->read_urbs[index], mem_flags); |
459 | if (res) { |
460 | if (res != -EPERM && res != -ENODEV) { |
461 | dev_err(&acm->data->dev, |
462 | "urb %d failed submission with %d\n" , |
463 | index, res); |
464 | } else { |
465 | dev_vdbg(&acm->data->dev, "intended failure %d\n" , res); |
466 | } |
467 | set_bit(nr: index, addr: &acm->read_urbs_free); |
468 | return res; |
469 | } else { |
470 | dev_vdbg(&acm->data->dev, "submitted urb %d\n" , index); |
471 | } |
472 | |
473 | return 0; |
474 | } |
475 | |
476 | static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) |
477 | { |
478 | int res; |
479 | int i; |
480 | |
481 | for (i = 0; i < acm->rx_buflimit; ++i) { |
482 | res = acm_submit_read_urb(acm, index: i, mem_flags); |
483 | if (res) |
484 | return res; |
485 | } |
486 | |
487 | return 0; |
488 | } |
489 | |
490 | static void acm_process_read_urb(struct acm *acm, struct urb *urb) |
491 | { |
492 | unsigned long flags; |
493 | |
494 | if (!urb->actual_length) |
495 | return; |
496 | |
497 | spin_lock_irqsave(&acm->read_lock, flags); |
498 | tty_insert_flip_string(port: &acm->port, chars: urb->transfer_buffer, |
499 | size: urb->actual_length); |
500 | spin_unlock_irqrestore(lock: &acm->read_lock, flags); |
501 | |
502 | tty_flip_buffer_push(port: &acm->port); |
503 | } |
504 | |
505 | static void acm_read_bulk_callback(struct urb *urb) |
506 | { |
507 | struct acm_rb *rb = urb->context; |
508 | struct acm *acm = rb->instance; |
509 | int status = urb->status; |
510 | bool stopped = false; |
511 | bool stalled = false; |
512 | bool cooldown = false; |
513 | |
514 | dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n" , |
515 | rb->index, urb->actual_length, status); |
516 | |
517 | switch (status) { |
518 | case 0: |
519 | usb_mark_last_busy(udev: acm->dev); |
520 | acm_process_read_urb(acm, urb); |
521 | break; |
522 | case -EPIPE: |
523 | set_bit(EVENT_RX_STALL, addr: &acm->flags); |
524 | stalled = true; |
525 | break; |
526 | case -ENOENT: |
527 | case -ECONNRESET: |
528 | case -ESHUTDOWN: |
529 | dev_dbg(&acm->data->dev, |
530 | "%s - urb shutting down with status: %d\n" , |
531 | __func__, status); |
532 | stopped = true; |
533 | break; |
534 | case -EOVERFLOW: |
535 | case -EPROTO: |
536 | dev_dbg(&acm->data->dev, |
537 | "%s - cooling babbling device\n" , __func__); |
538 | usb_mark_last_busy(udev: acm->dev); |
539 | set_bit(nr: rb->index, addr: &acm->urbs_in_error_delay); |
540 | set_bit(ACM_ERROR_DELAY, addr: &acm->flags); |
541 | cooldown = true; |
542 | break; |
543 | default: |
544 | dev_dbg(&acm->data->dev, |
545 | "%s - nonzero urb status received: %d\n" , |
546 | __func__, status); |
547 | break; |
548 | } |
549 | |
550 | /* |
551 | * Make sure URB processing is done before marking as free to avoid |
552 | * racing with unthrottle() on another CPU. Matches the barriers |
553 | * implied by the test_and_clear_bit() in acm_submit_read_urb(). |
554 | */ |
555 | smp_mb__before_atomic(); |
556 | set_bit(nr: rb->index, addr: &acm->read_urbs_free); |
557 | /* |
558 | * Make sure URB is marked as free before checking the throttled flag |
559 | * to avoid racing with unthrottle() on another CPU. Matches the |
560 | * smp_mb() in unthrottle(). |
561 | */ |
562 | smp_mb__after_atomic(); |
563 | |
564 | if (stopped || stalled || cooldown) { |
565 | if (stalled) |
566 | schedule_delayed_work(dwork: &acm->dwork, delay: 0); |
567 | else if (cooldown) |
568 | schedule_delayed_work(dwork: &acm->dwork, HZ / 2); |
569 | return; |
570 | } |
571 | |
572 | if (test_bit(ACM_THROTTLED, &acm->flags)) |
573 | return; |
574 | |
575 | acm_submit_read_urb(acm, index: rb->index, GFP_ATOMIC); |
576 | } |
577 | |
578 | /* data interface wrote those outgoing bytes */ |
579 | static void acm_write_bulk(struct urb *urb) |
580 | { |
581 | struct acm_wb *wb = urb->context; |
582 | struct acm *acm = wb->instance; |
583 | unsigned long flags; |
584 | int status = urb->status; |
585 | |
586 | if (status || (urb->actual_length != urb->transfer_buffer_length)) |
587 | dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n" , |
588 | urb->actual_length, |
589 | urb->transfer_buffer_length, |
590 | status); |
591 | |
592 | spin_lock_irqsave(&acm->write_lock, flags); |
593 | acm_write_done(acm, wb); |
594 | spin_unlock_irqrestore(lock: &acm->write_lock, flags); |
595 | set_bit(EVENT_TTY_WAKEUP, addr: &acm->flags); |
596 | schedule_delayed_work(dwork: &acm->dwork, delay: 0); |
597 | } |
598 | |
599 | static void acm_softint(struct work_struct *work) |
600 | { |
601 | int i; |
602 | struct acm *acm = container_of(work, struct acm, dwork.work); |
603 | |
604 | if (test_bit(EVENT_RX_STALL, &acm->flags)) { |
605 | smp_mb(); /* against acm_suspend() */ |
606 | if (!acm->susp_count) { |
607 | for (i = 0; i < acm->rx_buflimit; i++) |
608 | usb_kill_urb(urb: acm->read_urbs[i]); |
609 | usb_clear_halt(dev: acm->dev, pipe: acm->in); |
610 | acm_submit_read_urbs(acm, GFP_KERNEL); |
611 | clear_bit(EVENT_RX_STALL, addr: &acm->flags); |
612 | } |
613 | } |
614 | |
615 | if (test_and_clear_bit(ACM_ERROR_DELAY, addr: &acm->flags)) { |
616 | for (i = 0; i < acm->rx_buflimit; i++) |
617 | if (test_and_clear_bit(nr: i, addr: &acm->urbs_in_error_delay)) |
618 | acm_submit_read_urb(acm, index: i, GFP_KERNEL); |
619 | } |
620 | |
621 | if (test_and_clear_bit(EVENT_TTY_WAKEUP, addr: &acm->flags)) |
622 | tty_port_tty_wakeup(port: &acm->port); |
623 | } |
624 | |
625 | /* |
626 | * TTY handlers |
627 | */ |
628 | |
629 | static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) |
630 | { |
631 | struct acm *acm; |
632 | int retval; |
633 | |
634 | acm = acm_get_by_minor(minor: tty->index); |
635 | if (!acm) |
636 | return -ENODEV; |
637 | |
638 | retval = tty_standard_install(driver, tty); |
639 | if (retval) |
640 | goto error_init_termios; |
641 | |
642 | /* |
643 | * Suppress initial echoing for some devices which might send data |
644 | * immediately after acm driver has been installed. |
645 | */ |
646 | if (acm->quirks & DISABLE_ECHO) |
647 | tty->termios.c_lflag &= ~ECHO; |
648 | |
649 | tty->driver_data = acm; |
650 | |
651 | return 0; |
652 | |
653 | error_init_termios: |
654 | tty_port_put(port: &acm->port); |
655 | return retval; |
656 | } |
657 | |
658 | static int acm_tty_open(struct tty_struct *tty, struct file *filp) |
659 | { |
660 | struct acm *acm = tty->driver_data; |
661 | |
662 | return tty_port_open(port: &acm->port, tty, filp); |
663 | } |
664 | |
665 | static void acm_port_dtr_rts(struct tty_port *port, bool active) |
666 | { |
667 | struct acm *acm = container_of(port, struct acm, port); |
668 | int val; |
669 | int res; |
670 | |
671 | if (active) |
672 | val = USB_CDC_CTRL_DTR | USB_CDC_CTRL_RTS; |
673 | else |
674 | val = 0; |
675 | |
676 | /* FIXME: add missing ctrlout locking throughout driver */ |
677 | acm->ctrlout = val; |
678 | |
679 | res = acm_set_control(acm, control: val); |
680 | if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) |
681 | /* This is broken in too many devices to spam the logs */ |
682 | dev_dbg(&acm->control->dev, "failed to set dtr/rts\n" ); |
683 | } |
684 | |
685 | static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) |
686 | { |
687 | struct acm *acm = container_of(port, struct acm, port); |
688 | int retval = -ENODEV; |
689 | int i; |
690 | |
691 | mutex_lock(&acm->mutex); |
692 | if (acm->disconnected) |
693 | goto disconnected; |
694 | |
695 | retval = usb_autopm_get_interface(intf: acm->control); |
696 | if (retval) |
697 | goto error_get_interface; |
698 | |
699 | set_bit(TTY_NO_WRITE_SPLIT, addr: &tty->flags); |
700 | acm->control->needs_remote_wakeup = 1; |
701 | |
702 | acm->ctrlurb->dev = acm->dev; |
703 | retval = usb_submit_urb(urb: acm->ctrlurb, GFP_KERNEL); |
704 | if (retval) { |
705 | dev_err(&acm->control->dev, |
706 | "%s - usb_submit_urb(ctrl irq) failed\n" , __func__); |
707 | goto error_submit_urb; |
708 | } |
709 | |
710 | acm_tty_set_termios(tty, NULL); |
711 | |
712 | /* |
713 | * Unthrottle device in case the TTY was closed while throttled. |
714 | */ |
715 | clear_bit(ACM_THROTTLED, addr: &acm->flags); |
716 | |
717 | retval = acm_submit_read_urbs(acm, GFP_KERNEL); |
718 | if (retval) |
719 | goto error_submit_read_urbs; |
720 | |
721 | usb_autopm_put_interface(intf: acm->control); |
722 | |
723 | mutex_unlock(lock: &acm->mutex); |
724 | |
725 | return 0; |
726 | |
727 | error_submit_read_urbs: |
728 | for (i = 0; i < acm->rx_buflimit; i++) |
729 | usb_kill_urb(urb: acm->read_urbs[i]); |
730 | usb_kill_urb(urb: acm->ctrlurb); |
731 | error_submit_urb: |
732 | usb_autopm_put_interface(intf: acm->control); |
733 | error_get_interface: |
734 | disconnected: |
735 | mutex_unlock(lock: &acm->mutex); |
736 | |
737 | return usb_translate_errors(error_code: retval); |
738 | } |
739 | |
740 | static void acm_port_destruct(struct tty_port *port) |
741 | { |
742 | struct acm *acm = container_of(port, struct acm, port); |
743 | |
744 | if (acm->minor != ACM_MINOR_INVALID) |
745 | acm_release_minor(acm); |
746 | usb_put_intf(intf: acm->control); |
747 | kfree(objp: acm->country_codes); |
748 | kfree(objp: acm); |
749 | } |
750 | |
751 | static void acm_port_shutdown(struct tty_port *port) |
752 | { |
753 | struct acm *acm = container_of(port, struct acm, port); |
754 | struct urb *urb; |
755 | struct acm_wb *wb; |
756 | |
757 | /* |
758 | * Need to grab write_lock to prevent race with resume, but no need to |
759 | * hold it due to the tty-port initialised flag. |
760 | */ |
761 | acm_poison_urbs(acm); |
762 | spin_lock_irq(lock: &acm->write_lock); |
763 | spin_unlock_irq(lock: &acm->write_lock); |
764 | |
765 | usb_autopm_get_interface_no_resume(intf: acm->control); |
766 | acm->control->needs_remote_wakeup = 0; |
767 | usb_autopm_put_interface(intf: acm->control); |
768 | |
769 | for (;;) { |
770 | urb = usb_get_from_anchor(anchor: &acm->delayed); |
771 | if (!urb) |
772 | break; |
773 | wb = urb->context; |
774 | wb->use = false; |
775 | usb_autopm_put_interface_async(intf: acm->control); |
776 | } |
777 | |
778 | acm_unpoison_urbs(acm); |
779 | |
780 | } |
781 | |
782 | static void acm_tty_cleanup(struct tty_struct *tty) |
783 | { |
784 | struct acm *acm = tty->driver_data; |
785 | |
786 | tty_port_put(port: &acm->port); |
787 | } |
788 | |
789 | static void acm_tty_hangup(struct tty_struct *tty) |
790 | { |
791 | struct acm *acm = tty->driver_data; |
792 | |
793 | tty_port_hangup(port: &acm->port); |
794 | } |
795 | |
796 | static void acm_tty_close(struct tty_struct *tty, struct file *filp) |
797 | { |
798 | struct acm *acm = tty->driver_data; |
799 | |
800 | tty_port_close(port: &acm->port, tty, filp); |
801 | } |
802 | |
803 | static ssize_t acm_tty_write(struct tty_struct *tty, const u8 *buf, |
804 | size_t count) |
805 | { |
806 | struct acm *acm = tty->driver_data; |
807 | int stat; |
808 | unsigned long flags; |
809 | int wbn; |
810 | struct acm_wb *wb; |
811 | |
812 | if (!count) |
813 | return 0; |
814 | |
815 | dev_vdbg(&acm->data->dev, "%zu bytes from tty layer\n" , count); |
816 | |
817 | spin_lock_irqsave(&acm->write_lock, flags); |
818 | wbn = acm_wb_alloc(acm); |
819 | if (wbn < 0) { |
820 | spin_unlock_irqrestore(lock: &acm->write_lock, flags); |
821 | return 0; |
822 | } |
823 | wb = &acm->wb[wbn]; |
824 | |
825 | if (!acm->dev) { |
826 | wb->use = false; |
827 | spin_unlock_irqrestore(lock: &acm->write_lock, flags); |
828 | return -ENODEV; |
829 | } |
830 | |
831 | count = (count > acm->writesize) ? acm->writesize : count; |
832 | dev_vdbg(&acm->data->dev, "writing %zu bytes\n" , count); |
833 | memcpy(wb->buf, buf, count); |
834 | wb->len = count; |
835 | |
836 | stat = usb_autopm_get_interface_async(intf: acm->control); |
837 | if (stat) { |
838 | wb->use = false; |
839 | spin_unlock_irqrestore(lock: &acm->write_lock, flags); |
840 | return stat; |
841 | } |
842 | |
843 | if (acm->susp_count) { |
844 | usb_anchor_urb(urb: wb->urb, anchor: &acm->delayed); |
845 | spin_unlock_irqrestore(lock: &acm->write_lock, flags); |
846 | return count; |
847 | } |
848 | |
849 | stat = acm_start_wb(acm, wb); |
850 | spin_unlock_irqrestore(lock: &acm->write_lock, flags); |
851 | |
852 | if (stat < 0) |
853 | return stat; |
854 | return count; |
855 | } |
856 | |
857 | static unsigned int acm_tty_write_room(struct tty_struct *tty) |
858 | { |
859 | struct acm *acm = tty->driver_data; |
860 | /* |
861 | * Do not let the line discipline to know that we have a reserve, |
862 | * or it might get too enthusiastic. |
863 | */ |
864 | return acm_wb_is_avail(acm) ? acm->writesize : 0; |
865 | } |
866 | |
867 | static void acm_tty_flush_buffer(struct tty_struct *tty) |
868 | { |
869 | struct acm *acm = tty->driver_data; |
870 | unsigned long flags; |
871 | int i; |
872 | |
873 | spin_lock_irqsave(&acm->write_lock, flags); |
874 | for (i = 0; i < ACM_NW; i++) |
875 | if (acm->wb[i].use) |
876 | usb_unlink_urb(urb: acm->wb[i].urb); |
877 | spin_unlock_irqrestore(lock: &acm->write_lock, flags); |
878 | } |
879 | |
880 | static unsigned int acm_tty_chars_in_buffer(struct tty_struct *tty) |
881 | { |
882 | struct acm *acm = tty->driver_data; |
883 | /* |
884 | * if the device was unplugged then any remaining characters fell out |
885 | * of the connector ;) |
886 | */ |
887 | if (acm->disconnected) |
888 | return 0; |
889 | /* |
890 | * This is inaccurate (overcounts), but it works. |
891 | */ |
892 | return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; |
893 | } |
894 | |
895 | static void acm_tty_throttle(struct tty_struct *tty) |
896 | { |
897 | struct acm *acm = tty->driver_data; |
898 | |
899 | set_bit(ACM_THROTTLED, addr: &acm->flags); |
900 | } |
901 | |
902 | static void acm_tty_unthrottle(struct tty_struct *tty) |
903 | { |
904 | struct acm *acm = tty->driver_data; |
905 | |
906 | clear_bit(ACM_THROTTLED, addr: &acm->flags); |
907 | |
908 | /* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */ |
909 | smp_mb(); |
910 | |
911 | acm_submit_read_urbs(acm, GFP_KERNEL); |
912 | } |
913 | |
914 | static int acm_tty_break_ctl(struct tty_struct *tty, int state) |
915 | { |
916 | struct acm *acm = tty->driver_data; |
917 | int retval; |
918 | |
919 | retval = acm_send_break(acm, state ? 0xffff : 0); |
920 | if (retval < 0) |
921 | dev_dbg(&acm->control->dev, |
922 | "%s - send break failed\n" , __func__); |
923 | return retval; |
924 | } |
925 | |
926 | static int acm_tty_tiocmget(struct tty_struct *tty) |
927 | { |
928 | struct acm *acm = tty->driver_data; |
929 | |
930 | return (acm->ctrlout & USB_CDC_CTRL_DTR ? TIOCM_DTR : 0) | |
931 | (acm->ctrlout & USB_CDC_CTRL_RTS ? TIOCM_RTS : 0) | |
932 | (acm->ctrlin & USB_CDC_SERIAL_STATE_DSR ? TIOCM_DSR : 0) | |
933 | (acm->ctrlin & USB_CDC_SERIAL_STATE_RING_SIGNAL ? TIOCM_RI : 0) | |
934 | (acm->ctrlin & USB_CDC_SERIAL_STATE_DCD ? TIOCM_CD : 0) | |
935 | TIOCM_CTS; |
936 | } |
937 | |
938 | static int acm_tty_tiocmset(struct tty_struct *tty, |
939 | unsigned int set, unsigned int clear) |
940 | { |
941 | struct acm *acm = tty->driver_data; |
942 | unsigned int newctrl; |
943 | |
944 | newctrl = acm->ctrlout; |
945 | set = (set & TIOCM_DTR ? USB_CDC_CTRL_DTR : 0) | |
946 | (set & TIOCM_RTS ? USB_CDC_CTRL_RTS : 0); |
947 | clear = (clear & TIOCM_DTR ? USB_CDC_CTRL_DTR : 0) | |
948 | (clear & TIOCM_RTS ? USB_CDC_CTRL_RTS : 0); |
949 | |
950 | newctrl = (newctrl & ~clear) | set; |
951 | |
952 | if (acm->ctrlout == newctrl) |
953 | return 0; |
954 | return acm_set_control(acm, control: acm->ctrlout = newctrl); |
955 | } |
956 | |
957 | static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss) |
958 | { |
959 | struct acm *acm = tty->driver_data; |
960 | |
961 | ss->line = acm->minor; |
962 | ss->close_delay = jiffies_to_msecs(j: acm->port.close_delay) / 10; |
963 | ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? |
964 | ASYNC_CLOSING_WAIT_NONE : |
965 | jiffies_to_msecs(j: acm->port.closing_wait) / 10; |
966 | return 0; |
967 | } |
968 | |
969 | static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss) |
970 | { |
971 | struct acm *acm = tty->driver_data; |
972 | unsigned int closing_wait, close_delay; |
973 | int retval = 0; |
974 | |
975 | close_delay = msecs_to_jiffies(m: ss->close_delay * 10); |
976 | closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ? |
977 | ASYNC_CLOSING_WAIT_NONE : |
978 | msecs_to_jiffies(m: ss->closing_wait * 10); |
979 | |
980 | mutex_lock(&acm->port.mutex); |
981 | |
982 | if (!capable(CAP_SYS_ADMIN)) { |
983 | if ((close_delay != acm->port.close_delay) || |
984 | (closing_wait != acm->port.closing_wait)) |
985 | retval = -EPERM; |
986 | } else { |
987 | acm->port.close_delay = close_delay; |
988 | acm->port.closing_wait = closing_wait; |
989 | } |
990 | |
991 | mutex_unlock(lock: &acm->port.mutex); |
992 | return retval; |
993 | } |
994 | |
995 | static int wait_serial_change(struct acm *acm, unsigned long arg) |
996 | { |
997 | int rv = 0; |
998 | DECLARE_WAITQUEUE(wait, current); |
999 | struct async_icount old, new; |
1000 | |
1001 | do { |
1002 | spin_lock_irq(lock: &acm->read_lock); |
1003 | old = acm->oldcount; |
1004 | new = acm->iocount; |
1005 | acm->oldcount = new; |
1006 | spin_unlock_irq(lock: &acm->read_lock); |
1007 | |
1008 | if ((arg & TIOCM_DSR) && |
1009 | old.dsr != new.dsr) |
1010 | break; |
1011 | if ((arg & TIOCM_CD) && |
1012 | old.dcd != new.dcd) |
1013 | break; |
1014 | if ((arg & TIOCM_RI) && |
1015 | old.rng != new.rng) |
1016 | break; |
1017 | |
1018 | add_wait_queue(wq_head: &acm->wioctl, wq_entry: &wait); |
1019 | set_current_state(TASK_INTERRUPTIBLE); |
1020 | schedule(); |
1021 | remove_wait_queue(wq_head: &acm->wioctl, wq_entry: &wait); |
1022 | if (acm->disconnected) { |
1023 | if (arg & TIOCM_CD) |
1024 | break; |
1025 | else |
1026 | rv = -ENODEV; |
1027 | } else { |
1028 | if (signal_pending(current)) |
1029 | rv = -ERESTARTSYS; |
1030 | } |
1031 | } while (!rv); |
1032 | |
1033 | |
1034 | |
1035 | return rv; |
1036 | } |
1037 | |
1038 | static int acm_tty_get_icount(struct tty_struct *tty, |
1039 | struct serial_icounter_struct *icount) |
1040 | { |
1041 | struct acm *acm = tty->driver_data; |
1042 | |
1043 | icount->dsr = acm->iocount.dsr; |
1044 | icount->rng = acm->iocount.rng; |
1045 | icount->dcd = acm->iocount.dcd; |
1046 | icount->frame = acm->iocount.frame; |
1047 | icount->overrun = acm->iocount.overrun; |
1048 | icount->parity = acm->iocount.parity; |
1049 | icount->brk = acm->iocount.brk; |
1050 | |
1051 | return 0; |
1052 | } |
1053 | |
1054 | static int acm_tty_ioctl(struct tty_struct *tty, |
1055 | unsigned int cmd, unsigned long arg) |
1056 | { |
1057 | struct acm *acm = tty->driver_data; |
1058 | int rv = -ENOIOCTLCMD; |
1059 | |
1060 | switch (cmd) { |
1061 | case TIOCMIWAIT: |
1062 | rv = usb_autopm_get_interface(intf: acm->control); |
1063 | if (rv < 0) { |
1064 | rv = -EIO; |
1065 | break; |
1066 | } |
1067 | rv = wait_serial_change(acm, arg); |
1068 | usb_autopm_put_interface(intf: acm->control); |
1069 | break; |
1070 | } |
1071 | |
1072 | return rv; |
1073 | } |
1074 | |
1075 | static void acm_tty_set_termios(struct tty_struct *tty, |
1076 | const struct ktermios *termios_old) |
1077 | { |
1078 | struct acm *acm = tty->driver_data; |
1079 | struct ktermios *termios = &tty->termios; |
1080 | struct usb_cdc_line_coding newline; |
1081 | int newctrl = acm->ctrlout; |
1082 | |
1083 | newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); |
1084 | newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; |
1085 | newline.bParityType = termios->c_cflag & PARENB ? |
1086 | (termios->c_cflag & PARODD ? 1 : 2) + |
1087 | (termios->c_cflag & CMSPAR ? 2 : 0) : 0; |
1088 | newline.bDataBits = tty_get_char_size(cflag: termios->c_cflag); |
1089 | |
1090 | /* FIXME: Needs to clear unsupported bits in the termios */ |
1091 | acm->clocal = ((termios->c_cflag & CLOCAL) != 0); |
1092 | |
1093 | if (C_BAUD(tty) == B0) { |
1094 | newline.dwDTERate = acm->line.dwDTERate; |
1095 | newctrl &= ~USB_CDC_CTRL_DTR; |
1096 | } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { |
1097 | newctrl |= USB_CDC_CTRL_DTR; |
1098 | } |
1099 | |
1100 | if (newctrl != acm->ctrlout) |
1101 | acm_set_control(acm, control: acm->ctrlout = newctrl); |
1102 | |
1103 | if (memcmp(p: &acm->line, q: &newline, size: sizeof newline)) { |
1104 | memcpy(&acm->line, &newline, sizeof newline); |
1105 | dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n" , |
1106 | __func__, |
1107 | le32_to_cpu(newline.dwDTERate), |
1108 | newline.bCharFormat, newline.bParityType, |
1109 | newline.bDataBits); |
1110 | acm_set_line(acm, &acm->line); |
1111 | } |
1112 | } |
1113 | |
1114 | static const struct tty_port_operations acm_port_ops = { |
1115 | .dtr_rts = acm_port_dtr_rts, |
1116 | .shutdown = acm_port_shutdown, |
1117 | .activate = acm_port_activate, |
1118 | .destruct = acm_port_destruct, |
1119 | }; |
1120 | |
1121 | /* |
1122 | * USB probe and disconnect routines. |
1123 | */ |
1124 | |
1125 | /* Little helpers: write/read buffers free */ |
1126 | static void acm_write_buffers_free(struct acm *acm) |
1127 | { |
1128 | int i; |
1129 | struct acm_wb *wb; |
1130 | |
1131 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) |
1132 | usb_free_coherent(dev: acm->dev, size: acm->writesize, addr: wb->buf, dma: wb->dmah); |
1133 | } |
1134 | |
1135 | static void acm_read_buffers_free(struct acm *acm) |
1136 | { |
1137 | int i; |
1138 | |
1139 | for (i = 0; i < acm->rx_buflimit; i++) |
1140 | usb_free_coherent(dev: acm->dev, size: acm->readsize, |
1141 | addr: acm->read_buffers[i].base, dma: acm->read_buffers[i].dma); |
1142 | } |
1143 | |
1144 | /* Little helper: write buffers allocate */ |
1145 | static int acm_write_buffers_alloc(struct acm *acm) |
1146 | { |
1147 | int i; |
1148 | struct acm_wb *wb; |
1149 | |
1150 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { |
1151 | wb->buf = usb_alloc_coherent(dev: acm->dev, size: acm->writesize, GFP_KERNEL, |
1152 | dma: &wb->dmah); |
1153 | if (!wb->buf) { |
1154 | while (i != 0) { |
1155 | --i; |
1156 | --wb; |
1157 | usb_free_coherent(dev: acm->dev, size: acm->writesize, |
1158 | addr: wb->buf, dma: wb->dmah); |
1159 | } |
1160 | return -ENOMEM; |
1161 | } |
1162 | } |
1163 | return 0; |
1164 | } |
1165 | |
1166 | static int acm_probe(struct usb_interface *intf, |
1167 | const struct usb_device_id *id) |
1168 | { |
1169 | struct usb_cdc_union_desc * = NULL; |
1170 | struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; |
1171 | unsigned char *buffer = intf->altsetting->extra; |
1172 | int buflen = intf->altsetting->extralen; |
1173 | struct usb_interface *control_interface; |
1174 | struct usb_interface *data_interface; |
1175 | struct usb_endpoint_descriptor *epctrl = NULL; |
1176 | struct usb_endpoint_descriptor *epread = NULL; |
1177 | struct usb_endpoint_descriptor *epwrite = NULL; |
1178 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
1179 | struct usb_cdc_parsed_header h; |
1180 | struct acm *acm; |
1181 | int minor; |
1182 | int ctrlsize, readsize; |
1183 | u8 *buf; |
1184 | int call_intf_num = -1; |
1185 | int data_intf_num = -1; |
1186 | unsigned long quirks; |
1187 | int num_rx_buf; |
1188 | int i; |
1189 | int combined_interfaces = 0; |
1190 | struct device *tty_dev; |
1191 | int rv = -ENOMEM; |
1192 | int res; |
1193 | |
1194 | /* normal quirks */ |
1195 | quirks = (unsigned long)id->driver_info; |
1196 | |
1197 | if (quirks == IGNORE_DEVICE) |
1198 | return -ENODEV; |
1199 | |
1200 | memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); |
1201 | |
1202 | num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; |
1203 | |
1204 | /* handle quirks deadly to normal probing*/ |
1205 | if (quirks == NO_UNION_NORMAL) { |
1206 | data_interface = usb_ifnum_to_if(dev: usb_dev, ifnum: 1); |
1207 | control_interface = usb_ifnum_to_if(dev: usb_dev, ifnum: 0); |
1208 | /* we would crash */ |
1209 | if (!data_interface || !control_interface) |
1210 | return -ENODEV; |
1211 | goto skip_normal_probe; |
1212 | } |
1213 | |
1214 | /* normal probing*/ |
1215 | if (!buffer) { |
1216 | dev_err(&intf->dev, "Weird descriptor references\n" ); |
1217 | return -EINVAL; |
1218 | } |
1219 | |
1220 | if (!buflen) { |
1221 | if (intf->cur_altsetting->endpoint && |
1222 | intf->cur_altsetting->endpoint->extralen && |
1223 | intf->cur_altsetting->endpoint->extra) { |
1224 | dev_dbg(&intf->dev, |
1225 | "Seeking extra descriptors on endpoint\n" ); |
1226 | buflen = intf->cur_altsetting->endpoint->extralen; |
1227 | buffer = intf->cur_altsetting->endpoint->extra; |
1228 | } else { |
1229 | dev_err(&intf->dev, |
1230 | "Zero length descriptor references\n" ); |
1231 | return -EINVAL; |
1232 | } |
1233 | } |
1234 | |
1235 | cdc_parse_cdc_header(hdr: &h, intf, buffer, buflen); |
1236 | union_header = h.usb_cdc_union_desc; |
1237 | cmgmd = h.usb_cdc_call_mgmt_descriptor; |
1238 | if (cmgmd) |
1239 | call_intf_num = cmgmd->bDataInterface; |
1240 | |
1241 | if (!union_header) { |
1242 | if (intf->cur_altsetting->desc.bNumEndpoints == 3) { |
1243 | dev_dbg(&intf->dev, "No union descriptor, assuming single interface\n" ); |
1244 | combined_interfaces = 1; |
1245 | control_interface = data_interface = intf; |
1246 | goto look_for_collapsed_interface; |
1247 | } else if (call_intf_num > 0) { |
1248 | dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n" ); |
1249 | data_intf_num = call_intf_num; |
1250 | data_interface = usb_ifnum_to_if(dev: usb_dev, ifnum: data_intf_num); |
1251 | control_interface = intf; |
1252 | } else { |
1253 | dev_dbg(&intf->dev, "No union descriptor, giving up\n" ); |
1254 | return -ENODEV; |
1255 | } |
1256 | } else { |
1257 | int class = -1; |
1258 | |
1259 | data_intf_num = union_header->bSlaveInterface0; |
1260 | control_interface = usb_ifnum_to_if(dev: usb_dev, ifnum: union_header->bMasterInterface0); |
1261 | data_interface = usb_ifnum_to_if(dev: usb_dev, ifnum: data_intf_num); |
1262 | |
1263 | if (control_interface) |
1264 | class = control_interface->cur_altsetting->desc.bInterfaceClass; |
1265 | |
1266 | if (class != USB_CLASS_COMM && class != USB_CLASS_CDC_DATA) { |
1267 | dev_dbg(&intf->dev, "Broken union descriptor, assuming single interface\n" ); |
1268 | combined_interfaces = 1; |
1269 | control_interface = data_interface = intf; |
1270 | goto look_for_collapsed_interface; |
1271 | } |
1272 | } |
1273 | |
1274 | if (!control_interface || !data_interface) { |
1275 | dev_dbg(&intf->dev, "no interfaces\n" ); |
1276 | return -ENODEV; |
1277 | } |
1278 | |
1279 | if (data_intf_num != call_intf_num) |
1280 | dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n" ); |
1281 | |
1282 | if (control_interface == data_interface) { |
1283 | /* some broken devices designed for windows work this way */ |
1284 | dev_warn(&intf->dev,"Control and data interfaces are not separated!\n" ); |
1285 | combined_interfaces = 1; |
1286 | /* a popular other OS doesn't use it */ |
1287 | quirks |= NO_CAP_LINE; |
1288 | if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { |
1289 | dev_err(&intf->dev, "This needs exactly 3 endpoints\n" ); |
1290 | return -EINVAL; |
1291 | } |
1292 | look_for_collapsed_interface: |
1293 | res = usb_find_common_endpoints(alt: data_interface->cur_altsetting, |
1294 | bulk_in: &epread, bulk_out: &epwrite, int_in: &epctrl, NULL); |
1295 | if (res) |
1296 | return res; |
1297 | |
1298 | goto made_compressed_probe; |
1299 | } |
1300 | |
1301 | skip_normal_probe: |
1302 | |
1303 | /*workaround for switched interfaces */ |
1304 | if (data_interface->cur_altsetting->desc.bInterfaceClass != USB_CLASS_CDC_DATA) { |
1305 | if (control_interface->cur_altsetting->desc.bInterfaceClass == USB_CLASS_CDC_DATA) { |
1306 | dev_dbg(&intf->dev, |
1307 | "Your device has switched interfaces.\n" ); |
1308 | swap(control_interface, data_interface); |
1309 | } else { |
1310 | return -EINVAL; |
1311 | } |
1312 | } |
1313 | |
1314 | /* Accept probe requests only for the control interface */ |
1315 | if (!combined_interfaces && intf != control_interface) |
1316 | return -ENODEV; |
1317 | |
1318 | if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || |
1319 | control_interface->cur_altsetting->desc.bNumEndpoints == 0) |
1320 | return -EINVAL; |
1321 | |
1322 | epctrl = &control_interface->cur_altsetting->endpoint[0].desc; |
1323 | epread = &data_interface->cur_altsetting->endpoint[0].desc; |
1324 | epwrite = &data_interface->cur_altsetting->endpoint[1].desc; |
1325 | |
1326 | |
1327 | /* workaround for switched endpoints */ |
1328 | if (!usb_endpoint_dir_in(epd: epread)) { |
1329 | /* descriptors are swapped */ |
1330 | dev_dbg(&intf->dev, |
1331 | "The data interface has switched endpoints\n" ); |
1332 | swap(epread, epwrite); |
1333 | } |
1334 | made_compressed_probe: |
1335 | dev_dbg(&intf->dev, "interfaces are valid\n" ); |
1336 | |
1337 | acm = kzalloc(size: sizeof(struct acm), GFP_KERNEL); |
1338 | if (!acm) |
1339 | return -ENOMEM; |
1340 | |
1341 | tty_port_init(port: &acm->port); |
1342 | acm->port.ops = &acm_port_ops; |
1343 | |
1344 | ctrlsize = usb_endpoint_maxp(epd: epctrl); |
1345 | readsize = usb_endpoint_maxp(epd: epread) * |
1346 | (quirks == SINGLE_RX_URB ? 1 : 2); |
1347 | acm->combined_interfaces = combined_interfaces; |
1348 | acm->writesize = usb_endpoint_maxp(epd: epwrite) * 20; |
1349 | acm->control = control_interface; |
1350 | acm->data = data_interface; |
1351 | |
1352 | usb_get_intf(intf: acm->control); /* undone in destruct() */ |
1353 | |
1354 | minor = acm_alloc_minor(acm); |
1355 | if (minor < 0) { |
1356 | acm->minor = ACM_MINOR_INVALID; |
1357 | goto err_put_port; |
1358 | } |
1359 | |
1360 | acm->minor = minor; |
1361 | acm->dev = usb_dev; |
1362 | if (h.usb_cdc_acm_descriptor) |
1363 | acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; |
1364 | if (quirks & NO_CAP_LINE) |
1365 | acm->ctrl_caps &= ~USB_CDC_CAP_LINE; |
1366 | acm->ctrlsize = ctrlsize; |
1367 | acm->readsize = readsize; |
1368 | acm->rx_buflimit = num_rx_buf; |
1369 | INIT_DELAYED_WORK(&acm->dwork, acm_softint); |
1370 | init_waitqueue_head(&acm->wioctl); |
1371 | spin_lock_init(&acm->write_lock); |
1372 | spin_lock_init(&acm->read_lock); |
1373 | mutex_init(&acm->mutex); |
1374 | if (usb_endpoint_xfer_int(epd: epread)) { |
1375 | acm->bInterval = epread->bInterval; |
1376 | acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); |
1377 | } else { |
1378 | acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); |
1379 | } |
1380 | if (usb_endpoint_xfer_int(epd: epwrite)) |
1381 | acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); |
1382 | else |
1383 | acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); |
1384 | init_usb_anchor(anchor: &acm->delayed); |
1385 | acm->quirks = quirks; |
1386 | |
1387 | buf = usb_alloc_coherent(dev: usb_dev, size: ctrlsize, GFP_KERNEL, dma: &acm->ctrl_dma); |
1388 | if (!buf) |
1389 | goto err_put_port; |
1390 | acm->ctrl_buffer = buf; |
1391 | |
1392 | if (acm_write_buffers_alloc(acm) < 0) |
1393 | goto err_free_ctrl_buffer; |
1394 | |
1395 | acm->ctrlurb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL); |
1396 | if (!acm->ctrlurb) |
1397 | goto err_free_write_buffers; |
1398 | |
1399 | for (i = 0; i < num_rx_buf; i++) { |
1400 | struct acm_rb *rb = &(acm->read_buffers[i]); |
1401 | struct urb *urb; |
1402 | |
1403 | rb->base = usb_alloc_coherent(dev: acm->dev, size: readsize, GFP_KERNEL, |
1404 | dma: &rb->dma); |
1405 | if (!rb->base) |
1406 | goto err_free_read_urbs; |
1407 | rb->index = i; |
1408 | rb->instance = acm; |
1409 | |
1410 | urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL); |
1411 | if (!urb) |
1412 | goto err_free_read_urbs; |
1413 | |
1414 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
1415 | urb->transfer_dma = rb->dma; |
1416 | if (usb_endpoint_xfer_int(epd: epread)) |
1417 | usb_fill_int_urb(urb, dev: acm->dev, pipe: acm->in, transfer_buffer: rb->base, |
1418 | buffer_length: acm->readsize, |
1419 | complete_fn: acm_read_bulk_callback, context: rb, |
1420 | interval: acm->bInterval); |
1421 | else |
1422 | usb_fill_bulk_urb(urb, dev: acm->dev, pipe: acm->in, transfer_buffer: rb->base, |
1423 | buffer_length: acm->readsize, |
1424 | complete_fn: acm_read_bulk_callback, context: rb); |
1425 | |
1426 | acm->read_urbs[i] = urb; |
1427 | __set_bit(i, &acm->read_urbs_free); |
1428 | } |
1429 | for (i = 0; i < ACM_NW; i++) { |
1430 | struct acm_wb *snd = &(acm->wb[i]); |
1431 | |
1432 | snd->urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL); |
1433 | if (!snd->urb) |
1434 | goto err_free_write_urbs; |
1435 | |
1436 | if (usb_endpoint_xfer_int(epd: epwrite)) |
1437 | usb_fill_int_urb(urb: snd->urb, dev: usb_dev, pipe: acm->out, |
1438 | NULL, buffer_length: acm->writesize, complete_fn: acm_write_bulk, context: snd, interval: epwrite->bInterval); |
1439 | else |
1440 | usb_fill_bulk_urb(urb: snd->urb, dev: usb_dev, pipe: acm->out, |
1441 | NULL, buffer_length: acm->writesize, complete_fn: acm_write_bulk, context: snd); |
1442 | snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
1443 | if (quirks & SEND_ZERO_PACKET) |
1444 | snd->urb->transfer_flags |= URB_ZERO_PACKET; |
1445 | snd->instance = acm; |
1446 | } |
1447 | |
1448 | usb_set_intfdata(intf, data: acm); |
1449 | |
1450 | i = device_create_file(device: &intf->dev, entry: &dev_attr_bmCapabilities); |
1451 | if (i < 0) |
1452 | goto err_free_write_urbs; |
1453 | |
1454 | if (h.usb_cdc_country_functional_desc) { /* export the country data */ |
1455 | struct usb_cdc_country_functional_desc * cfd = |
1456 | h.usb_cdc_country_functional_desc; |
1457 | |
1458 | acm->country_codes = kmalloc(size: cfd->bLength - 4, GFP_KERNEL); |
1459 | if (!acm->country_codes) |
1460 | goto skip_countries; |
1461 | acm->country_code_size = cfd->bLength - 4; |
1462 | memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, |
1463 | cfd->bLength - 4); |
1464 | acm->country_rel_date = cfd->iCountryCodeRelDate; |
1465 | |
1466 | i = device_create_file(device: &intf->dev, entry: &dev_attr_wCountryCodes); |
1467 | if (i < 0) { |
1468 | kfree(objp: acm->country_codes); |
1469 | acm->country_codes = NULL; |
1470 | acm->country_code_size = 0; |
1471 | goto skip_countries; |
1472 | } |
1473 | |
1474 | i = device_create_file(device: &intf->dev, |
1475 | entry: &dev_attr_iCountryCodeRelDate); |
1476 | if (i < 0) { |
1477 | device_remove_file(dev: &intf->dev, attr: &dev_attr_wCountryCodes); |
1478 | kfree(objp: acm->country_codes); |
1479 | acm->country_codes = NULL; |
1480 | acm->country_code_size = 0; |
1481 | goto skip_countries; |
1482 | } |
1483 | } |
1484 | |
1485 | skip_countries: |
1486 | usb_fill_int_urb(urb: acm->ctrlurb, dev: usb_dev, |
1487 | usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), |
1488 | transfer_buffer: acm->ctrl_buffer, buffer_length: ctrlsize, complete_fn: acm_ctrl_irq, context: acm, |
1489 | /* works around buggy devices */ |
1490 | interval: epctrl->bInterval ? epctrl->bInterval : 16); |
1491 | acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
1492 | acm->ctrlurb->transfer_dma = acm->ctrl_dma; |
1493 | acm->notification_buffer = NULL; |
1494 | acm->nb_index = 0; |
1495 | acm->nb_size = 0; |
1496 | |
1497 | acm->line.dwDTERate = cpu_to_le32(9600); |
1498 | acm->line.bDataBits = 8; |
1499 | acm_set_line(acm, &acm->line); |
1500 | |
1501 | if (!acm->combined_interfaces) { |
1502 | rv = usb_driver_claim_interface(driver: &acm_driver, iface: data_interface, data: acm); |
1503 | if (rv) |
1504 | goto err_remove_files; |
1505 | } |
1506 | |
1507 | tty_dev = tty_port_register_device(port: &acm->port, driver: acm_tty_driver, index: minor, |
1508 | device: &control_interface->dev); |
1509 | if (IS_ERR(ptr: tty_dev)) { |
1510 | rv = PTR_ERR(ptr: tty_dev); |
1511 | goto err_release_data_interface; |
1512 | } |
1513 | |
1514 | if (quirks & CLEAR_HALT_CONDITIONS) { |
1515 | usb_clear_halt(dev: usb_dev, pipe: acm->in); |
1516 | usb_clear_halt(dev: usb_dev, pipe: acm->out); |
1517 | } |
1518 | |
1519 | dev_info(&intf->dev, "ttyACM%d: USB ACM device\n" , minor); |
1520 | |
1521 | return 0; |
1522 | |
1523 | err_release_data_interface: |
1524 | if (!acm->combined_interfaces) { |
1525 | /* Clear driver data so that disconnect() returns early. */ |
1526 | usb_set_intfdata(intf: data_interface, NULL); |
1527 | usb_driver_release_interface(driver: &acm_driver, iface: data_interface); |
1528 | } |
1529 | err_remove_files: |
1530 | if (acm->country_codes) { |
1531 | device_remove_file(dev: &acm->control->dev, |
1532 | attr: &dev_attr_wCountryCodes); |
1533 | device_remove_file(dev: &acm->control->dev, |
1534 | attr: &dev_attr_iCountryCodeRelDate); |
1535 | } |
1536 | device_remove_file(dev: &acm->control->dev, attr: &dev_attr_bmCapabilities); |
1537 | err_free_write_urbs: |
1538 | for (i = 0; i < ACM_NW; i++) |
1539 | usb_free_urb(urb: acm->wb[i].urb); |
1540 | err_free_read_urbs: |
1541 | for (i = 0; i < num_rx_buf; i++) |
1542 | usb_free_urb(urb: acm->read_urbs[i]); |
1543 | acm_read_buffers_free(acm); |
1544 | usb_free_urb(urb: acm->ctrlurb); |
1545 | err_free_write_buffers: |
1546 | acm_write_buffers_free(acm); |
1547 | err_free_ctrl_buffer: |
1548 | usb_free_coherent(dev: usb_dev, size: ctrlsize, addr: acm->ctrl_buffer, dma: acm->ctrl_dma); |
1549 | err_put_port: |
1550 | tty_port_put(port: &acm->port); |
1551 | |
1552 | return rv; |
1553 | } |
1554 | |
1555 | static void acm_disconnect(struct usb_interface *intf) |
1556 | { |
1557 | struct acm *acm = usb_get_intfdata(intf); |
1558 | struct tty_struct *tty; |
1559 | int i; |
1560 | |
1561 | /* sibling interface is already cleaning up */ |
1562 | if (!acm) |
1563 | return; |
1564 | |
1565 | acm->disconnected = true; |
1566 | /* |
1567 | * there is a circular dependency. acm_softint() can resubmit |
1568 | * the URBs in error handling so we need to block any |
1569 | * submission right away |
1570 | */ |
1571 | acm_poison_urbs(acm); |
1572 | mutex_lock(&acm->mutex); |
1573 | if (acm->country_codes) { |
1574 | device_remove_file(dev: &acm->control->dev, |
1575 | attr: &dev_attr_wCountryCodes); |
1576 | device_remove_file(dev: &acm->control->dev, |
1577 | attr: &dev_attr_iCountryCodeRelDate); |
1578 | } |
1579 | wake_up_all(&acm->wioctl); |
1580 | device_remove_file(dev: &acm->control->dev, attr: &dev_attr_bmCapabilities); |
1581 | usb_set_intfdata(intf: acm->control, NULL); |
1582 | usb_set_intfdata(intf: acm->data, NULL); |
1583 | mutex_unlock(lock: &acm->mutex); |
1584 | |
1585 | tty = tty_port_tty_get(port: &acm->port); |
1586 | if (tty) { |
1587 | tty_vhangup(tty); |
1588 | tty_kref_put(tty); |
1589 | } |
1590 | |
1591 | cancel_delayed_work_sync(dwork: &acm->dwork); |
1592 | |
1593 | tty_unregister_device(driver: acm_tty_driver, index: acm->minor); |
1594 | |
1595 | usb_free_urb(urb: acm->ctrlurb); |
1596 | for (i = 0; i < ACM_NW; i++) |
1597 | usb_free_urb(urb: acm->wb[i].urb); |
1598 | for (i = 0; i < acm->rx_buflimit; i++) |
1599 | usb_free_urb(urb: acm->read_urbs[i]); |
1600 | acm_write_buffers_free(acm); |
1601 | usb_free_coherent(dev: acm->dev, size: acm->ctrlsize, addr: acm->ctrl_buffer, dma: acm->ctrl_dma); |
1602 | acm_read_buffers_free(acm); |
1603 | |
1604 | kfree(objp: acm->notification_buffer); |
1605 | |
1606 | if (!acm->combined_interfaces) |
1607 | usb_driver_release_interface(driver: &acm_driver, iface: intf == acm->control ? |
1608 | acm->data : acm->control); |
1609 | |
1610 | tty_port_put(port: &acm->port); |
1611 | } |
1612 | |
1613 | #ifdef CONFIG_PM |
1614 | static int acm_suspend(struct usb_interface *intf, pm_message_t message) |
1615 | { |
1616 | struct acm *acm = usb_get_intfdata(intf); |
1617 | int cnt; |
1618 | |
1619 | spin_lock_irq(lock: &acm->write_lock); |
1620 | if (PMSG_IS_AUTO(message)) { |
1621 | if (acm->transmitting) { |
1622 | spin_unlock_irq(lock: &acm->write_lock); |
1623 | return -EBUSY; |
1624 | } |
1625 | } |
1626 | cnt = acm->susp_count++; |
1627 | spin_unlock_irq(lock: &acm->write_lock); |
1628 | |
1629 | if (cnt) |
1630 | return 0; |
1631 | |
1632 | acm_poison_urbs(acm); |
1633 | cancel_delayed_work_sync(dwork: &acm->dwork); |
1634 | acm->urbs_in_error_delay = 0; |
1635 | |
1636 | return 0; |
1637 | } |
1638 | |
1639 | static int acm_resume(struct usb_interface *intf) |
1640 | { |
1641 | struct acm *acm = usb_get_intfdata(intf); |
1642 | struct urb *urb; |
1643 | int rv = 0; |
1644 | |
1645 | spin_lock_irq(lock: &acm->write_lock); |
1646 | |
1647 | if (--acm->susp_count) |
1648 | goto out; |
1649 | |
1650 | acm_unpoison_urbs(acm); |
1651 | |
1652 | if (tty_port_initialized(port: &acm->port)) { |
1653 | rv = usb_submit_urb(urb: acm->ctrlurb, GFP_ATOMIC); |
1654 | |
1655 | for (;;) { |
1656 | urb = usb_get_from_anchor(anchor: &acm->delayed); |
1657 | if (!urb) |
1658 | break; |
1659 | |
1660 | acm_start_wb(acm, wb: urb->context); |
1661 | } |
1662 | |
1663 | /* |
1664 | * delayed error checking because we must |
1665 | * do the write path at all cost |
1666 | */ |
1667 | if (rv < 0) |
1668 | goto out; |
1669 | |
1670 | rv = acm_submit_read_urbs(acm, GFP_ATOMIC); |
1671 | } |
1672 | out: |
1673 | spin_unlock_irq(lock: &acm->write_lock); |
1674 | |
1675 | return rv; |
1676 | } |
1677 | |
1678 | static int acm_reset_resume(struct usb_interface *intf) |
1679 | { |
1680 | struct acm *acm = usb_get_intfdata(intf); |
1681 | |
1682 | if (tty_port_initialized(port: &acm->port)) |
1683 | tty_port_tty_hangup(port: &acm->port, check_clocal: false); |
1684 | |
1685 | return acm_resume(intf); |
1686 | } |
1687 | |
1688 | #endif /* CONFIG_PM */ |
1689 | |
1690 | static int acm_pre_reset(struct usb_interface *intf) |
1691 | { |
1692 | struct acm *acm = usb_get_intfdata(intf); |
1693 | |
1694 | clear_bit(EVENT_RX_STALL, addr: &acm->flags); |
1695 | acm->nb_index = 0; /* pending control transfers are lost */ |
1696 | |
1697 | return 0; |
1698 | } |
1699 | |
1700 | #define NOKIA_PCSUITE_ACM_INFO(x) \ |
1701 | USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ |
1702 | USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ |
1703 | USB_CDC_ACM_PROTO_VENDOR) |
1704 | |
1705 | #define SAMSUNG_PCSUITE_ACM_INFO(x) \ |
1706 | USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ |
1707 | USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ |
1708 | USB_CDC_ACM_PROTO_VENDOR) |
1709 | |
1710 | /* |
1711 | * USB driver structure. |
1712 | */ |
1713 | |
1714 | static const struct usb_device_id acm_ids[] = { |
1715 | /* quirky and broken devices */ |
1716 | { USB_DEVICE(0x0424, 0x274e), /* Microchip Technology, Inc. (formerly SMSC) */ |
1717 | .driver_info = DISABLE_ECHO, }, /* DISABLE ECHO in termios flag */ |
1718 | { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ |
1719 | .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ |
1720 | { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ |
1721 | .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ |
1722 | { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ |
1723 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
1724 | }, |
1725 | { USB_DEVICE(0x045b, 0x023c), /* Renesas USB Download mode */ |
1726 | .driver_info = DISABLE_ECHO, /* Don't echo banner */ |
1727 | }, |
1728 | { USB_DEVICE(0x045b, 0x0248), /* Renesas USB Download mode */ |
1729 | .driver_info = DISABLE_ECHO, /* Don't echo banner */ |
1730 | }, |
1731 | { USB_DEVICE(0x045b, 0x024D), /* Renesas USB Download mode */ |
1732 | .driver_info = DISABLE_ECHO, /* Don't echo banner */ |
1733 | }, |
1734 | { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ |
1735 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
1736 | }, |
1737 | { USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */ |
1738 | .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ |
1739 | }, |
1740 | { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ |
1741 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
1742 | }, |
1743 | { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ |
1744 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
1745 | }, |
1746 | { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ |
1747 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
1748 | }, |
1749 | { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ |
1750 | .driver_info = SINGLE_RX_URB, |
1751 | }, |
1752 | { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ |
1753 | .driver_info = SINGLE_RX_URB, /* firmware bug */ |
1754 | }, |
1755 | { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ |
1756 | .driver_info = SINGLE_RX_URB, /* firmware bug */ |
1757 | }, |
1758 | { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */ |
1759 | .driver_info = SINGLE_RX_URB, |
1760 | }, |
1761 | { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */ |
1762 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
1763 | }, |
1764 | { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ |
1765 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
1766 | }, |
1767 | { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ |
1768 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
1769 | }, |
1770 | { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ |
1771 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
1772 | }, |
1773 | { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ |
1774 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
1775 | }, |
1776 | { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ |
1777 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
1778 | }, |
1779 | { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */ |
1780 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
1781 | }, |
1782 | { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ |
1783 | .driver_info = QUIRK_CONTROL_LINE_STATE, }, |
1784 | { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ |
1785 | { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ |
1786 | { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ |
1787 | }, |
1788 | /* Motorola H24 HSPA module: */ |
1789 | { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ |
1790 | { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ |
1791 | .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ |
1792 | }, |
1793 | { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ |
1794 | .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ |
1795 | }, |
1796 | { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ |
1797 | .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ |
1798 | }, |
1799 | { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ |
1800 | .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ |
1801 | }, |
1802 | { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ |
1803 | .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ |
1804 | }, |
1805 | { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ |
1806 | .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ |
1807 | }, |
1808 | { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ |
1809 | .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ |
1810 | }, |
1811 | |
1812 | { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ |
1813 | .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on |
1814 | data interface instead of |
1815 | communications interface. |
1816 | Maybe we should define a new |
1817 | quirk for this. */ |
1818 | }, |
1819 | { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ |
1820 | .driver_info = NO_UNION_NORMAL, |
1821 | }, |
1822 | { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ |
1823 | .driver_info = NO_UNION_NORMAL, |
1824 | }, |
1825 | { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ |
1826 | .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ |
1827 | }, |
1828 | { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ |
1829 | .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ |
1830 | }, |
1831 | { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ |
1832 | .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ |
1833 | }, |
1834 | { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ |
1835 | .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ |
1836 | }, |
1837 | { USB_DEVICE(0x0c26, 0x0020), /* Icom ICF3400 Serie */ |
1838 | .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ |
1839 | }, |
1840 | { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */ |
1841 | .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ |
1842 | }, |
1843 | |
1844 | { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ |
1845 | .driver_info = CLEAR_HALT_CONDITIONS, |
1846 | }, |
1847 | |
1848 | /* Nokia S60 phones expose two ACM channels. The first is |
1849 | * a modem and is picked up by the standard AT-command |
1850 | * information below. The second is 'vendor-specific' but |
1851 | * is treated as a serial device at the S60 end, so we want |
1852 | * to expose it on Linux too. */ |
1853 | { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ |
1854 | { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ |
1855 | { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ |
1856 | { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ |
1857 | { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ |
1858 | { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ |
1859 | { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ |
1860 | { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ |
1861 | { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ |
1862 | { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ |
1863 | { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ |
1864 | { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ |
1865 | { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ |
1866 | { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ |
1867 | { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ |
1868 | { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ |
1869 | { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ |
1870 | { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ |
1871 | { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ |
1872 | { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ |
1873 | { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ |
1874 | { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ |
1875 | { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ |
1876 | { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ |
1877 | { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ |
1878 | { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ |
1879 | { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ |
1880 | { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ |
1881 | { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ |
1882 | { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ |
1883 | { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ |
1884 | { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ |
1885 | { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ |
1886 | { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ |
1887 | { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ |
1888 | { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ |
1889 | { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ |
1890 | { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ |
1891 | { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ |
1892 | { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ |
1893 | { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ |
1894 | { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ |
1895 | { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ |
1896 | { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ |
1897 | { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ |
1898 | { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ |
1899 | { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ |
1900 | { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ |
1901 | { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ |
1902 | { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ |
1903 | { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ |
1904 | { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ |
1905 | { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ |
1906 | { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ |
1907 | { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ |
1908 | { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ |
1909 | { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ |
1910 | |
1911 | /* Support for Owen devices */ |
1912 | { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ |
1913 | |
1914 | /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ |
1915 | |
1916 | #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) |
1917 | { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ |
1918 | .driver_info = IGNORE_DEVICE, |
1919 | }, |
1920 | { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ |
1921 | .driver_info = IGNORE_DEVICE, |
1922 | }, |
1923 | #endif |
1924 | |
1925 | #if IS_ENABLED(CONFIG_IR_TOY) |
1926 | { USB_DEVICE(0x04d8, 0xfd08), |
1927 | .driver_info = IGNORE_DEVICE, |
1928 | }, |
1929 | |
1930 | { USB_DEVICE(0x04d8, 0xf58b), |
1931 | .driver_info = IGNORE_DEVICE, |
1932 | }, |
1933 | #endif |
1934 | |
1935 | #if IS_ENABLED(CONFIG_USB_SERIAL_XR) |
1936 | { USB_DEVICE(0x04e2, 0x1400), .driver_info = IGNORE_DEVICE }, |
1937 | { USB_DEVICE(0x04e2, 0x1401), .driver_info = IGNORE_DEVICE }, |
1938 | { USB_DEVICE(0x04e2, 0x1402), .driver_info = IGNORE_DEVICE }, |
1939 | { USB_DEVICE(0x04e2, 0x1403), .driver_info = IGNORE_DEVICE }, |
1940 | { USB_DEVICE(0x04e2, 0x1410), .driver_info = IGNORE_DEVICE }, |
1941 | { USB_DEVICE(0x04e2, 0x1411), .driver_info = IGNORE_DEVICE }, |
1942 | { USB_DEVICE(0x04e2, 0x1412), .driver_info = IGNORE_DEVICE }, |
1943 | { USB_DEVICE(0x04e2, 0x1414), .driver_info = IGNORE_DEVICE }, |
1944 | { USB_DEVICE(0x04e2, 0x1420), .driver_info = IGNORE_DEVICE }, |
1945 | { USB_DEVICE(0x04e2, 0x1422), .driver_info = IGNORE_DEVICE }, |
1946 | { USB_DEVICE(0x04e2, 0x1424), .driver_info = IGNORE_DEVICE }, |
1947 | #endif |
1948 | |
1949 | /*Samsung phone in firmware update mode */ |
1950 | { USB_DEVICE(0x04e8, 0x685d), |
1951 | .driver_info = IGNORE_DEVICE, |
1952 | }, |
1953 | |
1954 | /* Exclude Infineon Flash Loader utility */ |
1955 | { USB_DEVICE(0x058b, 0x0041), |
1956 | .driver_info = IGNORE_DEVICE, |
1957 | }, |
1958 | |
1959 | /* Exclude ETAS ES58x */ |
1960 | { USB_DEVICE(0x108c, 0x0159), /* ES581.4 */ |
1961 | .driver_info = IGNORE_DEVICE, |
1962 | }, |
1963 | { USB_DEVICE(0x108c, 0x0168), /* ES582.1 */ |
1964 | .driver_info = IGNORE_DEVICE, |
1965 | }, |
1966 | { USB_DEVICE(0x108c, 0x0169), /* ES584.1 */ |
1967 | .driver_info = IGNORE_DEVICE, |
1968 | }, |
1969 | |
1970 | { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */ |
1971 | .driver_info = SEND_ZERO_PACKET, |
1972 | }, |
1973 | { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */ |
1974 | .driver_info = SEND_ZERO_PACKET, |
1975 | }, |
1976 | |
1977 | /* Exclude Goodix Fingerprint Reader */ |
1978 | { USB_DEVICE(0x27c6, 0x5395), |
1979 | .driver_info = IGNORE_DEVICE, |
1980 | }, |
1981 | |
1982 | /* Exclude Heimann Sensor GmbH USB appset demo */ |
1983 | { USB_DEVICE(0x32a7, 0x0000), |
1984 | .driver_info = IGNORE_DEVICE, |
1985 | }, |
1986 | |
1987 | /* control interfaces without any protocol set */ |
1988 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
1989 | USB_CDC_PROTO_NONE) }, |
1990 | |
1991 | /* control interfaces with various AT-command sets */ |
1992 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
1993 | USB_CDC_ACM_PROTO_AT_V25TER) }, |
1994 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
1995 | USB_CDC_ACM_PROTO_AT_PCCA101) }, |
1996 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
1997 | USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, |
1998 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
1999 | USB_CDC_ACM_PROTO_AT_GSM) }, |
2000 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
2001 | USB_CDC_ACM_PROTO_AT_3G) }, |
2002 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
2003 | USB_CDC_ACM_PROTO_AT_CDMA) }, |
2004 | |
2005 | { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ |
2006 | .driver_info = SEND_ZERO_PACKET, |
2007 | }, |
2008 | |
2009 | { } |
2010 | }; |
2011 | |
2012 | MODULE_DEVICE_TABLE(usb, acm_ids); |
2013 | |
2014 | static struct usb_driver acm_driver = { |
2015 | .name = "cdc_acm" , |
2016 | .probe = acm_probe, |
2017 | .disconnect = acm_disconnect, |
2018 | #ifdef CONFIG_PM |
2019 | .suspend = acm_suspend, |
2020 | .resume = acm_resume, |
2021 | .reset_resume = acm_reset_resume, |
2022 | #endif |
2023 | .pre_reset = acm_pre_reset, |
2024 | .id_table = acm_ids, |
2025 | #ifdef CONFIG_PM |
2026 | .supports_autosuspend = 1, |
2027 | #endif |
2028 | .disable_hub_initiated_lpm = 1, |
2029 | }; |
2030 | |
2031 | /* |
2032 | * TTY driver structures. |
2033 | */ |
2034 | |
2035 | static const struct tty_operations acm_ops = { |
2036 | .install = acm_tty_install, |
2037 | .open = acm_tty_open, |
2038 | .close = acm_tty_close, |
2039 | .cleanup = acm_tty_cleanup, |
2040 | .hangup = acm_tty_hangup, |
2041 | .write = acm_tty_write, |
2042 | .write_room = acm_tty_write_room, |
2043 | .flush_buffer = acm_tty_flush_buffer, |
2044 | .ioctl = acm_tty_ioctl, |
2045 | .throttle = acm_tty_throttle, |
2046 | .unthrottle = acm_tty_unthrottle, |
2047 | .chars_in_buffer = acm_tty_chars_in_buffer, |
2048 | .break_ctl = acm_tty_break_ctl, |
2049 | .set_termios = acm_tty_set_termios, |
2050 | .tiocmget = acm_tty_tiocmget, |
2051 | .tiocmset = acm_tty_tiocmset, |
2052 | .get_serial = get_serial_info, |
2053 | .set_serial = set_serial_info, |
2054 | .get_icount = acm_tty_get_icount, |
2055 | }; |
2056 | |
2057 | /* |
2058 | * Init / exit. |
2059 | */ |
2060 | |
2061 | static int __init acm_init(void) |
2062 | { |
2063 | int retval; |
2064 | acm_tty_driver = tty_alloc_driver(ACM_TTY_MINORS, TTY_DRIVER_REAL_RAW | |
2065 | TTY_DRIVER_DYNAMIC_DEV); |
2066 | if (IS_ERR(ptr: acm_tty_driver)) |
2067 | return PTR_ERR(ptr: acm_tty_driver); |
2068 | acm_tty_driver->driver_name = "acm" , |
2069 | acm_tty_driver->name = "ttyACM" , |
2070 | acm_tty_driver->major = ACM_TTY_MAJOR, |
2071 | acm_tty_driver->minor_start = 0, |
2072 | acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, |
2073 | acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, |
2074 | acm_tty_driver->init_termios = tty_std_termios; |
2075 | acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | |
2076 | HUPCL | CLOCAL; |
2077 | tty_set_operations(driver: acm_tty_driver, op: &acm_ops); |
2078 | |
2079 | retval = tty_register_driver(driver: acm_tty_driver); |
2080 | if (retval) { |
2081 | tty_driver_kref_put(driver: acm_tty_driver); |
2082 | return retval; |
2083 | } |
2084 | |
2085 | retval = usb_register(&acm_driver); |
2086 | if (retval) { |
2087 | tty_unregister_driver(driver: acm_tty_driver); |
2088 | tty_driver_kref_put(driver: acm_tty_driver); |
2089 | return retval; |
2090 | } |
2091 | |
2092 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n" ); |
2093 | |
2094 | return 0; |
2095 | } |
2096 | |
2097 | static void __exit acm_exit(void) |
2098 | { |
2099 | usb_deregister(&acm_driver); |
2100 | tty_unregister_driver(driver: acm_tty_driver); |
2101 | tty_driver_kref_put(driver: acm_tty_driver); |
2102 | idr_destroy(&acm_minors); |
2103 | } |
2104 | |
2105 | module_init(acm_init); |
2106 | module_exit(acm_exit); |
2107 | |
2108 | MODULE_AUTHOR(DRIVER_AUTHOR); |
2109 | MODULE_DESCRIPTION(DRIVER_DESC); |
2110 | MODULE_LICENSE("GPL" ); |
2111 | MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); |
2112 | |