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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * cdc-acm.c | |
3 | * | |
4 | * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> | |
5 | * Copyright (c) 1999 Pavel Machek <pavel@suse.cz> | |
6 | * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com> | |
7 | * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> | |
8 | * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name> | |
61a87adf | 9 | * Copyright (c) 2005 David Kubicek <dave@awk.cz> |
1da177e4 LT |
10 | * |
11 | * USB Abstract Control Model driver for USB modems and ISDN adapters | |
12 | * | |
13 | * Sponsored by SuSE | |
14 | * | |
15 | * ChangeLog: | |
16 | * v0.9 - thorough cleaning, URBification, almost a rewrite | |
17 | * v0.10 - some more cleanups | |
18 | * v0.11 - fixed flow control, read error doesn't stop reads | |
19 | * v0.12 - added TIOCM ioctls, added break handling, made struct acm kmalloced | |
20 | * v0.13 - added termios, added hangup | |
21 | * v0.14 - sized down struct acm | |
22 | * v0.15 - fixed flow control again - characters could be lost | |
23 | * v0.16 - added code for modems with swapped data and control interfaces | |
24 | * v0.17 - added new style probing | |
25 | * v0.18 - fixed new style probing for devices with more configurations | |
26 | * v0.19 - fixed CLOCAL handling (thanks to Richard Shih-Ping Chan) | |
27 | * v0.20 - switched to probing on interface (rather than device) class | |
28 | * v0.21 - revert to probing on device for devices with multiple configs | |
29 | * v0.22 - probe only the control interface. if usbcore doesn't choose the | |
30 | * config we want, sysadmin changes bConfigurationValue in sysfs. | |
31 | * v0.23 - use softirq for rx processing, as needed by tty layer | |
32 | * v0.24 - change probe method to evaluate CDC union descriptor | |
61a87adf | 33 | * v0.25 - downstream tasks paralelized to maximize throughput |
e4cf3aa8 | 34 | * v0.26 - multiple write urbs, writesize increased |
1da177e4 LT |
35 | */ |
36 | ||
37 | /* | |
38 | * This program is free software; you can redistribute it and/or modify | |
39 | * it under the terms of the GNU General Public License as published by | |
40 | * the Free Software Foundation; either version 2 of the License, or | |
41 | * (at your option) any later version. | |
42 | * | |
43 | * This program is distributed in the hope that it will be useful, | |
44 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
45 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
46 | * GNU General Public License for more details. | |
47 | * | |
48 | * You should have received a copy of the GNU General Public License | |
49 | * along with this program; if not, write to the Free Software | |
50 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
51 | */ | |
52 | ||
53 | #undef DEBUG | |
54 | ||
55 | #include <linux/kernel.h> | |
56 | #include <linux/errno.h> | |
57 | #include <linux/init.h> | |
58 | #include <linux/slab.h> | |
59 | #include <linux/tty.h> | |
60 | #include <linux/tty_driver.h> | |
61 | #include <linux/tty_flip.h> | |
62 | #include <linux/module.h> | |
4186ecf8 | 63 | #include <linux/mutex.h> |
1da177e4 LT |
64 | #include <asm/uaccess.h> |
65 | #include <linux/usb.h> | |
a8c28f23 | 66 | #include <linux/usb/cdc.h> |
1da177e4 LT |
67 | #include <asm/byteorder.h> |
68 | #include <asm/unaligned.h> | |
61a87adf | 69 | #include <linux/list.h> |
1da177e4 LT |
70 | |
71 | #include "cdc-acm.h" | |
72 | ||
73 | /* | |
74 | * Version Information | |
75 | */ | |
e4cf3aa8 | 76 | #define DRIVER_VERSION "v0.26" |
61a87adf | 77 | #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek" |
1da177e4 LT |
78 | #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" |
79 | ||
80 | static struct usb_driver acm_driver; | |
81 | static struct tty_driver *acm_tty_driver; | |
82 | static struct acm *acm_table[ACM_TTY_MINORS]; | |
83 | ||
4186ecf8 | 84 | static DEFINE_MUTEX(open_mutex); |
1da177e4 LT |
85 | |
86 | #define ACM_READY(acm) (acm && acm->dev && acm->used) | |
87 | ||
88 | /* | |
89 | * Functions for ACM control messages. | |
90 | */ | |
91 | ||
92 | static int acm_ctrl_msg(struct acm *acm, int request, int value, void *buf, int len) | |
93 | { | |
94 | int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), | |
95 | request, USB_RT_ACM, value, | |
96 | acm->control->altsetting[0].desc.bInterfaceNumber, | |
97 | buf, len, 5000); | |
98 | dbg("acm_control_msg: rq: 0x%02x val: %#x len: %#x result: %d", request, value, len, retval); | |
99 | return retval < 0 ? retval : 0; | |
100 | } | |
101 | ||
102 | /* devices aren't required to support these requests. | |
103 | * the cdc acm descriptor tells whether they do... | |
104 | */ | |
105 | #define acm_set_control(acm, control) \ | |
106 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0) | |
107 | #define acm_set_line(acm, line) \ | |
108 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) | |
109 | #define acm_send_break(acm, ms) \ | |
110 | acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) | |
111 | ||
884b600f ON |
112 | /* |
113 | * Write buffer management. | |
114 | * All of these assume proper locks taken by the caller. | |
115 | */ | |
116 | ||
117 | static int acm_wb_alloc(struct acm *acm) | |
118 | { | |
119 | int i, wbn; | |
120 | struct acm_wb *wb; | |
121 | ||
e4cf3aa8 | 122 | wbn = 0; |
884b600f ON |
123 | i = 0; |
124 | for (;;) { | |
125 | wb = &acm->wb[wbn]; | |
126 | if (!wb->use) { | |
127 | wb->use = 1; | |
128 | return wbn; | |
129 | } | |
86478944 ON |
130 | wbn = (wbn + 1) % ACM_NW; |
131 | if (++i >= ACM_NW) | |
884b600f ON |
132 | return -1; |
133 | } | |
134 | } | |
135 | ||
884b600f ON |
136 | static int acm_wb_is_avail(struct acm *acm) |
137 | { | |
138 | int i, n; | |
139 | ||
86478944 ON |
140 | n = ACM_NW; |
141 | for (i = 0; i < ACM_NW; i++) { | |
142 | n -= acm->wb[i].use; | |
884b600f ON |
143 | } |
144 | return n; | |
145 | } | |
146 | ||
147 | static inline int acm_wb_is_used(struct acm *acm, int wbn) | |
148 | { | |
149 | return acm->wb[wbn].use; | |
150 | } | |
151 | ||
152 | /* | |
153 | * Finish write. | |
154 | */ | |
e4cf3aa8 | 155 | static void acm_write_done(struct acm *acm, struct acm_wb *wb) |
884b600f ON |
156 | { |
157 | unsigned long flags; | |
884b600f ON |
158 | |
159 | spin_lock_irqsave(&acm->write_lock, flags); | |
160 | acm->write_ready = 1; | |
e4cf3aa8 | 161 | wb->use = 0; |
11ea859d | 162 | acm->transmitting--; |
884b600f ON |
163 | spin_unlock_irqrestore(&acm->write_lock, flags); |
164 | } | |
165 | ||
166 | /* | |
167 | * Poke write. | |
11ea859d ON |
168 | * |
169 | * the caller is responsible for locking | |
884b600f | 170 | */ |
11ea859d ON |
171 | |
172 | static int acm_start_wb(struct acm *acm, struct acm_wb *wb) | |
173 | { | |
174 | int rc; | |
175 | ||
176 | acm->transmitting++; | |
177 | ||
178 | wb->urb->transfer_buffer = wb->buf; | |
179 | wb->urb->transfer_dma = wb->dmah; | |
180 | wb->urb->transfer_buffer_length = wb->len; | |
181 | wb->urb->dev = acm->dev; | |
182 | ||
183 | if ((rc = usb_submit_urb(wb->urb, GFP_ATOMIC)) < 0) { | |
184 | dbg("usb_submit_urb(write bulk) failed: %d", rc); | |
185 | acm_write_done(acm, wb); | |
186 | } | |
187 | return rc; | |
188 | } | |
189 | ||
e4cf3aa8 | 190 | static int acm_write_start(struct acm *acm, int wbn) |
884b600f ON |
191 | { |
192 | unsigned long flags; | |
884b600f ON |
193 | struct acm_wb *wb; |
194 | int rc; | |
195 | ||
196 | spin_lock_irqsave(&acm->write_lock, flags); | |
197 | if (!acm->dev) { | |
198 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
199 | return -ENODEV; | |
200 | } | |
201 | ||
202 | if (!acm->write_ready) { | |
203 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
204 | return 0; /* A white lie */ | |
205 | } | |
206 | ||
11ea859d ON |
207 | wb = &acm->wb[wbn]; |
208 | if(acm_wb_is_avail(acm) <= 1) | |
209 | acm->write_ready = 0; | |
210 | ||
211 | dbg("%s susp_count: %d", __func__, acm->susp_count); | |
212 | if (acm->susp_count) { | |
213 | acm->old_ready = acm->write_ready; | |
214 | acm->delayed_wb = wb; | |
215 | acm->write_ready = 0; | |
216 | schedule_work(&acm->waker); | |
217 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
218 | return 0; /* A white lie */ | |
219 | } | |
220 | usb_mark_last_busy(acm->dev); | |
221 | ||
884b600f ON |
222 | if (!acm_wb_is_used(acm, wbn)) { |
223 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
224 | return 0; | |
225 | } | |
884b600f | 226 | |
11ea859d | 227 | rc = acm_start_wb(acm, wb); |
884b600f ON |
228 | spin_unlock_irqrestore(&acm->write_lock, flags); |
229 | ||
884b600f | 230 | return rc; |
11ea859d | 231 | |
884b600f | 232 | } |
c4cabd28 ON |
233 | /* |
234 | * attributes exported through sysfs | |
235 | */ | |
236 | static ssize_t show_caps | |
237 | (struct device *dev, struct device_attribute *attr, char *buf) | |
238 | { | |
239 | struct usb_interface *intf = to_usb_interface(dev); | |
240 | struct acm *acm = usb_get_intfdata(intf); | |
241 | ||
242 | return sprintf(buf, "%d", acm->ctrl_caps); | |
243 | } | |
244 | static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL); | |
245 | ||
246 | static ssize_t show_country_codes | |
247 | (struct device *dev, struct device_attribute *attr, char *buf) | |
248 | { | |
249 | struct usb_interface *intf = to_usb_interface(dev); | |
250 | struct acm *acm = usb_get_intfdata(intf); | |
251 | ||
252 | memcpy(buf, acm->country_codes, acm->country_code_size); | |
253 | return acm->country_code_size; | |
254 | } | |
255 | ||
256 | static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL); | |
257 | ||
258 | static ssize_t show_country_rel_date | |
259 | (struct device *dev, struct device_attribute *attr, char *buf) | |
260 | { | |
261 | struct usb_interface *intf = to_usb_interface(dev); | |
262 | struct acm *acm = usb_get_intfdata(intf); | |
263 | ||
264 | return sprintf(buf, "%d", acm->country_rel_date); | |
265 | } | |
884b600f | 266 | |
c4cabd28 | 267 | static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL); |
1da177e4 LT |
268 | /* |
269 | * Interrupt handlers for various ACM device responses | |
270 | */ | |
271 | ||
272 | /* control interface reports status changes with "interrupt" transfers */ | |
7d12e780 | 273 | static void acm_ctrl_irq(struct urb *urb) |
1da177e4 LT |
274 | { |
275 | struct acm *acm = urb->context; | |
276 | struct usb_cdc_notification *dr = urb->transfer_buffer; | |
277 | unsigned char *data; | |
278 | int newctrl; | |
185d4058 GKH |
279 | int retval; |
280 | int status = urb->status; | |
1da177e4 | 281 | |
185d4058 | 282 | switch (status) { |
1da177e4 LT |
283 | case 0: |
284 | /* success */ | |
285 | break; | |
286 | case -ECONNRESET: | |
287 | case -ENOENT: | |
288 | case -ESHUTDOWN: | |
289 | /* this urb is terminated, clean up */ | |
441b62c1 | 290 | dbg("%s - urb shutting down with status: %d", __func__, status); |
1da177e4 LT |
291 | return; |
292 | default: | |
441b62c1 | 293 | dbg("%s - nonzero urb status received: %d", __func__, status); |
1da177e4 LT |
294 | goto exit; |
295 | } | |
296 | ||
297 | if (!ACM_READY(acm)) | |
298 | goto exit; | |
299 | ||
300 | data = (unsigned char *)(dr + 1); | |
301 | switch (dr->bNotificationType) { | |
302 | ||
303 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: | |
304 | ||
305 | dbg("%s network", dr->wValue ? "connected to" : "disconnected from"); | |
306 | break; | |
307 | ||
308 | case USB_CDC_NOTIFY_SERIAL_STATE: | |
309 | ||
a5abdeaf | 310 | newctrl = get_unaligned_le16(data); |
1da177e4 LT |
311 | |
312 | if (acm->tty && !acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { | |
313 | dbg("calling hangup"); | |
314 | tty_hangup(acm->tty); | |
315 | } | |
316 | ||
317 | acm->ctrlin = newctrl; | |
318 | ||
319 | dbg("input control lines: dcd%c dsr%c break%c ring%c framing%c parity%c overrun%c", | |
320 | acm->ctrlin & ACM_CTRL_DCD ? '+' : '-', acm->ctrlin & ACM_CTRL_DSR ? '+' : '-', | |
321 | acm->ctrlin & ACM_CTRL_BRK ? '+' : '-', acm->ctrlin & ACM_CTRL_RI ? '+' : '-', | |
322 | acm->ctrlin & ACM_CTRL_FRAMING ? '+' : '-', acm->ctrlin & ACM_CTRL_PARITY ? '+' : '-', | |
323 | acm->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-'); | |
324 | ||
325 | break; | |
326 | ||
327 | default: | |
328 | dbg("unknown notification %d received: index %d len %d data0 %d data1 %d", | |
329 | dr->bNotificationType, dr->wIndex, | |
330 | dr->wLength, data[0], data[1]); | |
331 | break; | |
332 | } | |
333 | exit: | |
11ea859d | 334 | usb_mark_last_busy(acm->dev); |
185d4058 GKH |
335 | retval = usb_submit_urb (urb, GFP_ATOMIC); |
336 | if (retval) | |
1da177e4 | 337 | err ("%s - usb_submit_urb failed with result %d", |
441b62c1 | 338 | __func__, retval); |
1da177e4 LT |
339 | } |
340 | ||
341 | /* data interface returns incoming bytes, or we got unthrottled */ | |
7d12e780 | 342 | static void acm_read_bulk(struct urb *urb) |
1da177e4 | 343 | { |
61a87adf DK |
344 | struct acm_rb *buf; |
345 | struct acm_ru *rcv = urb->context; | |
346 | struct acm *acm = rcv->instance; | |
86478944 | 347 | int status = urb->status; |
185d4058 GKH |
348 | |
349 | dbg("Entering acm_read_bulk with status %d", status); | |
1da177e4 | 350 | |
11ea859d ON |
351 | if (!ACM_READY(acm)) { |
352 | dev_dbg(&acm->data->dev, "Aborting, acm not ready"); | |
1da177e4 | 353 | return; |
11ea859d ON |
354 | } |
355 | usb_mark_last_busy(acm->dev); | |
1da177e4 | 356 | |
86478944 | 357 | if (status) |
898eb71c | 358 | dev_dbg(&acm->data->dev, "bulk rx status %d\n", status); |
1da177e4 | 359 | |
61a87adf DK |
360 | buf = rcv->buffer; |
361 | buf->size = urb->actual_length; | |
362 | ||
86478944 ON |
363 | if (likely(status == 0)) { |
364 | spin_lock(&acm->read_lock); | |
11ea859d | 365 | acm->processing++; |
86478944 ON |
366 | list_add_tail(&rcv->list, &acm->spare_read_urbs); |
367 | list_add_tail(&buf->list, &acm->filled_read_bufs); | |
368 | spin_unlock(&acm->read_lock); | |
369 | } else { | |
370 | /* we drop the buffer due to an error */ | |
371 | spin_lock(&acm->read_lock); | |
372 | list_add_tail(&rcv->list, &acm->spare_read_urbs); | |
373 | list_add(&buf->list, &acm->spare_read_bufs); | |
374 | spin_unlock(&acm->read_lock); | |
375 | /* nevertheless the tasklet must be kicked unconditionally | |
376 | so the queue cannot dry up */ | |
377 | } | |
11ea859d ON |
378 | if (likely(!acm->susp_count)) |
379 | tasklet_schedule(&acm->urb_task); | |
1da177e4 LT |
380 | } |
381 | ||
382 | static void acm_rx_tasklet(unsigned long _acm) | |
383 | { | |
384 | struct acm *acm = (void *)_acm; | |
61a87adf | 385 | struct acm_rb *buf; |
1da177e4 | 386 | struct tty_struct *tty = acm->tty; |
61a87adf | 387 | struct acm_ru *rcv; |
762f007b | 388 | unsigned long flags; |
ca79b7b4 | 389 | unsigned char throttled; |
11ea859d | 390 | |
1da177e4 LT |
391 | dbg("Entering acm_rx_tasklet"); |
392 | ||
ca79b7b4 | 393 | if (!ACM_READY(acm)) |
11ea859d ON |
394 | { |
395 | dbg("acm_rx_tasklet: ACM not ready"); | |
ca79b7b4 | 396 | return; |
11ea859d | 397 | } |
ca79b7b4 | 398 | |
834dbca5 | 399 | spin_lock_irqsave(&acm->throttle_lock, flags); |
ca79b7b4 | 400 | throttled = acm->throttle; |
834dbca5 | 401 | spin_unlock_irqrestore(&acm->throttle_lock, flags); |
ca79b7b4 | 402 | if (throttled) |
11ea859d ON |
403 | { |
404 | dbg("acm_rx_tasklet: throttled"); | |
61a87adf | 405 | return; |
11ea859d | 406 | } |
61a87adf DK |
407 | |
408 | next_buffer: | |
762f007b | 409 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 410 | if (list_empty(&acm->filled_read_bufs)) { |
762f007b | 411 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf | 412 | goto urbs; |
1da177e4 | 413 | } |
61a87adf DK |
414 | buf = list_entry(acm->filled_read_bufs.next, |
415 | struct acm_rb, list); | |
416 | list_del(&buf->list); | |
762f007b | 417 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf | 418 | |
3dd2ae81 | 419 | dbg("acm_rx_tasklet: procesing buf 0x%p, size = %d", buf, buf->size); |
61a87adf | 420 | |
33f0f88f | 421 | tty_buffer_request_room(tty, buf->size); |
834dbca5 | 422 | spin_lock_irqsave(&acm->throttle_lock, flags); |
ca79b7b4 | 423 | throttled = acm->throttle; |
834dbca5 | 424 | spin_unlock_irqrestore(&acm->throttle_lock, flags); |
ca79b7b4 | 425 | if (!throttled) |
33f0f88f | 426 | tty_insert_flip_string(tty, buf->base, buf->size); |
61a87adf | 427 | tty_flip_buffer_push(tty); |
1da177e4 | 428 | |
ca79b7b4 ON |
429 | if (throttled) { |
430 | dbg("Throttling noticed"); | |
762f007b | 431 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 432 | list_add(&buf->list, &acm->filled_read_bufs); |
762f007b | 433 | spin_unlock_irqrestore(&acm->read_lock, flags); |
1da177e4 LT |
434 | return; |
435 | } | |
1da177e4 | 436 | |
762f007b | 437 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 438 | list_add(&buf->list, &acm->spare_read_bufs); |
762f007b | 439 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf DK |
440 | goto next_buffer; |
441 | ||
442 | urbs: | |
443 | while (!list_empty(&acm->spare_read_bufs)) { | |
762f007b | 444 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 445 | if (list_empty(&acm->spare_read_urbs)) { |
11ea859d | 446 | acm->processing = 0; |
762f007b | 447 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf DK |
448 | return; |
449 | } | |
450 | rcv = list_entry(acm->spare_read_urbs.next, | |
451 | struct acm_ru, list); | |
452 | list_del(&rcv->list); | |
762f007b | 453 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf DK |
454 | |
455 | buf = list_entry(acm->spare_read_bufs.next, | |
456 | struct acm_rb, list); | |
457 | list_del(&buf->list); | |
458 | ||
459 | rcv->buffer = buf; | |
460 | ||
461 | usb_fill_bulk_urb(rcv->urb, acm->dev, | |
462 | acm->rx_endpoint, | |
463 | buf->base, | |
464 | acm->readsize, | |
465 | acm_read_bulk, rcv); | |
466 | rcv->urb->transfer_dma = buf->dma; | |
467 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
468 | ||
61a87adf DK |
469 | /* This shouldn't kill the driver as unsuccessful URBs are returned to the |
470 | free-urbs-pool and resubmited ASAP */ | |
11ea859d ON |
471 | spin_lock_irqsave(&acm->read_lock, flags); |
472 | if (acm->susp_count || usb_submit_urb(rcv->urb, GFP_ATOMIC) < 0) { | |
61a87adf | 473 | list_add(&buf->list, &acm->spare_read_bufs); |
61a87adf | 474 | list_add(&rcv->list, &acm->spare_read_urbs); |
11ea859d | 475 | acm->processing = 0; |
762f007b | 476 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf | 477 | return; |
11ea859d ON |
478 | } else { |
479 | spin_unlock_irqrestore(&acm->read_lock, flags); | |
480 | dbg("acm_rx_tasklet: sending urb 0x%p, rcv 0x%p, buf 0x%p", rcv->urb, rcv, buf); | |
61a87adf DK |
481 | } |
482 | } | |
11ea859d ON |
483 | spin_lock_irqsave(&acm->read_lock, flags); |
484 | acm->processing = 0; | |
485 | spin_unlock_irqrestore(&acm->read_lock, flags); | |
1da177e4 LT |
486 | } |
487 | ||
488 | /* data interface wrote those outgoing bytes */ | |
7d12e780 | 489 | static void acm_write_bulk(struct urb *urb) |
1da177e4 | 490 | { |
e4cf3aa8 | 491 | struct acm *acm; |
cdc97792 | 492 | struct acm_wb *wb = urb->context; |
1da177e4 | 493 | |
3dd2ae81 | 494 | dbg("Entering acm_write_bulk with status %d", urb->status); |
1da177e4 | 495 | |
e4cf3aa8 DE |
496 | acm = wb->instance; |
497 | acm_write_done(acm, wb); | |
884b600f ON |
498 | if (ACM_READY(acm)) |
499 | schedule_work(&acm->work); | |
1da177e4 LT |
500 | } |
501 | ||
c4028958 | 502 | static void acm_softint(struct work_struct *work) |
1da177e4 | 503 | { |
c4028958 | 504 | struct acm *acm = container_of(work, struct acm, work); |
3dd2ae81 | 505 | dbg("Entering acm_softint."); |
1da177e4 LT |
506 | |
507 | if (!ACM_READY(acm)) | |
508 | return; | |
509 | tty_wakeup(acm->tty); | |
510 | } | |
511 | ||
11ea859d ON |
512 | static void acm_waker(struct work_struct *waker) |
513 | { | |
514 | struct acm *acm = container_of(waker, struct acm, waker); | |
515 | long flags; | |
516 | int rv; | |
517 | ||
518 | rv = usb_autopm_get_interface(acm->control); | |
519 | if (rv < 0) { | |
520 | err("Autopm failure in %s", __func__); | |
521 | return; | |
522 | } | |
523 | if (acm->delayed_wb) { | |
524 | acm_start_wb(acm, acm->delayed_wb); | |
525 | acm->delayed_wb = NULL; | |
526 | } | |
527 | spin_lock_irqsave(&acm->write_lock, flags); | |
528 | acm->write_ready = acm->old_ready; | |
529 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
530 | usb_autopm_put_interface(acm->control); | |
531 | } | |
532 | ||
1da177e4 LT |
533 | /* |
534 | * TTY handlers | |
535 | */ | |
536 | ||
537 | static int acm_tty_open(struct tty_struct *tty, struct file *filp) | |
538 | { | |
539 | struct acm *acm; | |
540 | int rv = -EINVAL; | |
61a87adf | 541 | int i; |
3dd2ae81 | 542 | dbg("Entering acm_tty_open."); |
4186ecf8 AV |
543 | |
544 | mutex_lock(&open_mutex); | |
1da177e4 LT |
545 | |
546 | acm = acm_table[tty->index]; | |
547 | if (!acm || !acm->dev) | |
548 | goto err_out; | |
549 | else | |
550 | rv = 0; | |
551 | ||
28d1dfad | 552 | set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); |
1da177e4 LT |
553 | tty->driver_data = acm; |
554 | acm->tty = tty; | |
555 | ||
61a87adf DK |
556 | /* force low_latency on so that our tty_push actually forces the data through, |
557 | otherwise it is scheduled, and with high data rates data can get lost. */ | |
558 | tty->low_latency = 1; | |
1da177e4 | 559 | |
94409cc1 ON |
560 | if (usb_autopm_get_interface(acm->control) < 0) |
561 | goto early_bail; | |
11ea859d ON |
562 | else |
563 | acm->control->needs_remote_wakeup = 1; | |
1365baf7 ON |
564 | |
565 | mutex_lock(&acm->mutex); | |
1da177e4 | 566 | if (acm->used++) { |
1365baf7 | 567 | usb_autopm_put_interface(acm->control); |
1da177e4 LT |
568 | goto done; |
569 | } | |
570 | ||
1365baf7 | 571 | |
1da177e4 LT |
572 | acm->ctrlurb->dev = acm->dev; |
573 | if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) { | |
574 | dbg("usb_submit_urb(ctrl irq) failed"); | |
575 | goto bail_out; | |
576 | } | |
577 | ||
ca79b7b4 ON |
578 | if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) && |
579 | (acm->ctrl_caps & USB_CDC_CAP_LINE)) | |
1da177e4 | 580 | goto full_bailout; |
11ea859d | 581 | usb_autopm_put_interface(acm->control); |
1da177e4 | 582 | |
61a87adf DK |
583 | INIT_LIST_HEAD(&acm->spare_read_urbs); |
584 | INIT_LIST_HEAD(&acm->spare_read_bufs); | |
585 | INIT_LIST_HEAD(&acm->filled_read_bufs); | |
86478944 | 586 | for (i = 0; i < acm->rx_buflimit; i++) { |
61a87adf DK |
587 | list_add(&(acm->ru[i].list), &acm->spare_read_urbs); |
588 | } | |
86478944 | 589 | for (i = 0; i < acm->rx_buflimit; i++) { |
61a87adf DK |
590 | list_add(&(acm->rb[i].list), &acm->spare_read_bufs); |
591 | } | |
592 | ||
ca79b7b4 ON |
593 | acm->throttle = 0; |
594 | ||
61a87adf | 595 | tasklet_schedule(&acm->urb_task); |
1da177e4 LT |
596 | |
597 | done: | |
598 | err_out: | |
1365baf7 | 599 | mutex_unlock(&acm->mutex); |
94409cc1 | 600 | mutex_unlock(&open_mutex); |
1da177e4 LT |
601 | return rv; |
602 | ||
603 | full_bailout: | |
1da177e4 LT |
604 | usb_kill_urb(acm->ctrlurb); |
605 | bail_out: | |
1365baf7 | 606 | usb_autopm_put_interface(acm->control); |
1da177e4 | 607 | acm->used--; |
1365baf7 | 608 | mutex_unlock(&acm->mutex); |
94409cc1 ON |
609 | early_bail: |
610 | mutex_unlock(&open_mutex); | |
1da177e4 LT |
611 | return -EIO; |
612 | } | |
613 | ||
83ef344a | 614 | static void acm_tty_unregister(struct acm *acm) |
615 | { | |
86478944 | 616 | int i,nr; |
61a87adf | 617 | |
86478944 | 618 | nr = acm->rx_buflimit; |
83ef344a | 619 | tty_unregister_device(acm_tty_driver, acm->minor); |
620 | usb_put_intf(acm->control); | |
621 | acm_table[acm->minor] = NULL; | |
622 | usb_free_urb(acm->ctrlurb); | |
e4cf3aa8 DE |
623 | for (i = 0; i < ACM_NW; i++) |
624 | usb_free_urb(acm->wb[i].urb); | |
86478944 | 625 | for (i = 0; i < nr; i++) |
61a87adf | 626 | usb_free_urb(acm->ru[i].urb); |
c4cabd28 | 627 | kfree(acm->country_codes); |
83ef344a | 628 | kfree(acm); |
629 | } | |
630 | ||
1da177e4 LT |
631 | static void acm_tty_close(struct tty_struct *tty, struct file *filp) |
632 | { | |
633 | struct acm *acm = tty->driver_data; | |
86478944 | 634 | int i,nr; |
1da177e4 LT |
635 | |
636 | if (!acm || !acm->used) | |
637 | return; | |
638 | ||
86478944 | 639 | nr = acm->rx_buflimit; |
4186ecf8 | 640 | mutex_lock(&open_mutex); |
1da177e4 LT |
641 | if (!--acm->used) { |
642 | if (acm->dev) { | |
11ea859d | 643 | usb_autopm_get_interface(acm->control); |
1da177e4 LT |
644 | acm_set_control(acm, acm->ctrlout = 0); |
645 | usb_kill_urb(acm->ctrlurb); | |
e4cf3aa8 DE |
646 | for (i = 0; i < ACM_NW; i++) |
647 | usb_kill_urb(acm->wb[i].urb); | |
86478944 | 648 | for (i = 0; i < nr; i++) |
61a87adf | 649 | usb_kill_urb(acm->ru[i].urb); |
11ea859d | 650 | acm->control->needs_remote_wakeup = 0; |
1365baf7 | 651 | usb_autopm_put_interface(acm->control); |
83ef344a | 652 | } else |
653 | acm_tty_unregister(acm); | |
1da177e4 | 654 | } |
4186ecf8 | 655 | mutex_unlock(&open_mutex); |
1da177e4 LT |
656 | } |
657 | ||
658 | static int acm_tty_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
659 | { | |
660 | struct acm *acm = tty->driver_data; | |
661 | int stat; | |
884b600f ON |
662 | unsigned long flags; |
663 | int wbn; | |
664 | struct acm_wb *wb; | |
665 | ||
3dd2ae81 | 666 | dbg("Entering acm_tty_write to write %d bytes,", count); |
1da177e4 LT |
667 | |
668 | if (!ACM_READY(acm)) | |
669 | return -EINVAL; | |
1da177e4 LT |
670 | if (!count) |
671 | return 0; | |
672 | ||
884b600f ON |
673 | spin_lock_irqsave(&acm->write_lock, flags); |
674 | if ((wbn = acm_wb_alloc(acm)) < 0) { | |
675 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
884b600f ON |
676 | return 0; |
677 | } | |
678 | wb = &acm->wb[wbn]; | |
1da177e4 | 679 | |
884b600f | 680 | count = (count > acm->writesize) ? acm->writesize : count; |
1da177e4 | 681 | dbg("Get %d bytes...", count); |
884b600f ON |
682 | memcpy(wb->buf, buf, count); |
683 | wb->len = count; | |
684 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
1da177e4 | 685 | |
e4cf3aa8 | 686 | if ((stat = acm_write_start(acm, wbn)) < 0) |
1da177e4 | 687 | return stat; |
1da177e4 LT |
688 | return count; |
689 | } | |
690 | ||
691 | static int acm_tty_write_room(struct tty_struct *tty) | |
692 | { | |
693 | struct acm *acm = tty->driver_data; | |
694 | if (!ACM_READY(acm)) | |
695 | return -EINVAL; | |
884b600f ON |
696 | /* |
697 | * Do not let the line discipline to know that we have a reserve, | |
698 | * or it might get too enthusiastic. | |
699 | */ | |
700 | return (acm->write_ready && acm_wb_is_avail(acm)) ? acm->writesize : 0; | |
1da177e4 LT |
701 | } |
702 | ||
703 | static int acm_tty_chars_in_buffer(struct tty_struct *tty) | |
704 | { | |
705 | struct acm *acm = tty->driver_data; | |
706 | if (!ACM_READY(acm)) | |
707 | return -EINVAL; | |
884b600f ON |
708 | /* |
709 | * This is inaccurate (overcounts), but it works. | |
710 | */ | |
86478944 | 711 | return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; |
1da177e4 LT |
712 | } |
713 | ||
714 | static void acm_tty_throttle(struct tty_struct *tty) | |
715 | { | |
716 | struct acm *acm = tty->driver_data; | |
717 | if (!ACM_READY(acm)) | |
718 | return; | |
719 | spin_lock_bh(&acm->throttle_lock); | |
720 | acm->throttle = 1; | |
721 | spin_unlock_bh(&acm->throttle_lock); | |
722 | } | |
723 | ||
724 | static void acm_tty_unthrottle(struct tty_struct *tty) | |
725 | { | |
726 | struct acm *acm = tty->driver_data; | |
727 | if (!ACM_READY(acm)) | |
728 | return; | |
729 | spin_lock_bh(&acm->throttle_lock); | |
730 | acm->throttle = 0; | |
731 | spin_unlock_bh(&acm->throttle_lock); | |
61a87adf | 732 | tasklet_schedule(&acm->urb_task); |
1da177e4 LT |
733 | } |
734 | ||
735 | static void acm_tty_break_ctl(struct tty_struct *tty, int state) | |
736 | { | |
737 | struct acm *acm = tty->driver_data; | |
738 | if (!ACM_READY(acm)) | |
739 | return; | |
740 | if (acm_send_break(acm, state ? 0xffff : 0)) | |
741 | dbg("send break failed"); | |
742 | } | |
743 | ||
744 | static int acm_tty_tiocmget(struct tty_struct *tty, struct file *file) | |
745 | { | |
746 | struct acm *acm = tty->driver_data; | |
747 | ||
748 | if (!ACM_READY(acm)) | |
749 | return -EINVAL; | |
750 | ||
751 | return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | | |
752 | (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | | |
753 | (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | | |
754 | (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | | |
755 | (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | | |
756 | TIOCM_CTS; | |
757 | } | |
758 | ||
759 | static int acm_tty_tiocmset(struct tty_struct *tty, struct file *file, | |
760 | unsigned int set, unsigned int clear) | |
761 | { | |
762 | struct acm *acm = tty->driver_data; | |
763 | unsigned int newctrl; | |
764 | ||
765 | if (!ACM_READY(acm)) | |
766 | return -EINVAL; | |
767 | ||
768 | newctrl = acm->ctrlout; | |
769 | set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); | |
770 | clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); | |
771 | ||
772 | newctrl = (newctrl & ~clear) | set; | |
773 | ||
774 | if (acm->ctrlout == newctrl) | |
775 | return 0; | |
776 | return acm_set_control(acm, acm->ctrlout = newctrl); | |
777 | } | |
778 | ||
779 | static int acm_tty_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) | |
780 | { | |
781 | struct acm *acm = tty->driver_data; | |
782 | ||
783 | if (!ACM_READY(acm)) | |
784 | return -EINVAL; | |
785 | ||
786 | return -ENOIOCTLCMD; | |
787 | } | |
788 | ||
4c4c9432 | 789 | static const __u32 acm_tty_speed[] = { |
1da177e4 LT |
790 | 0, 50, 75, 110, 134, 150, 200, 300, 600, |
791 | 1200, 1800, 2400, 4800, 9600, 19200, 38400, | |
792 | 57600, 115200, 230400, 460800, 500000, 576000, | |
793 | 921600, 1000000, 1152000, 1500000, 2000000, | |
794 | 2500000, 3000000, 3500000, 4000000 | |
795 | }; | |
796 | ||
4c4c9432 | 797 | static const __u8 acm_tty_size[] = { |
1da177e4 LT |
798 | 5, 6, 7, 8 |
799 | }; | |
800 | ||
606d099c | 801 | static void acm_tty_set_termios(struct tty_struct *tty, struct ktermios *termios_old) |
1da177e4 LT |
802 | { |
803 | struct acm *acm = tty->driver_data; | |
606d099c | 804 | struct ktermios *termios = tty->termios; |
1da177e4 LT |
805 | struct usb_cdc_line_coding newline; |
806 | int newctrl = acm->ctrlout; | |
807 | ||
808 | if (!ACM_READY(acm)) | |
809 | return; | |
810 | ||
811 | newline.dwDTERate = cpu_to_le32p(acm_tty_speed + | |
812 | (termios->c_cflag & CBAUD & ~CBAUDEX) + (termios->c_cflag & CBAUDEX ? 15 : 0)); | |
813 | newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; | |
814 | newline.bParityType = termios->c_cflag & PARENB ? | |
815 | (termios->c_cflag & PARODD ? 1 : 2) + (termios->c_cflag & CMSPAR ? 2 : 0) : 0; | |
816 | newline.bDataBits = acm_tty_size[(termios->c_cflag & CSIZE) >> 4]; | |
817 | ||
818 | acm->clocal = ((termios->c_cflag & CLOCAL) != 0); | |
819 | ||
820 | if (!newline.dwDTERate) { | |
821 | newline.dwDTERate = acm->line.dwDTERate; | |
822 | newctrl &= ~ACM_CTRL_DTR; | |
823 | } else newctrl |= ACM_CTRL_DTR; | |
824 | ||
825 | if (newctrl != acm->ctrlout) | |
826 | acm_set_control(acm, acm->ctrlout = newctrl); | |
827 | ||
828 | if (memcmp(&acm->line, &newline, sizeof newline)) { | |
829 | memcpy(&acm->line, &newline, sizeof newline); | |
830 | dbg("set line: %d %d %d %d", le32_to_cpu(newline.dwDTERate), | |
831 | newline.bCharFormat, newline.bParityType, | |
832 | newline.bDataBits); | |
833 | acm_set_line(acm, &acm->line); | |
834 | } | |
835 | } | |
836 | ||
837 | /* | |
838 | * USB probe and disconnect routines. | |
839 | */ | |
840 | ||
830f4021 | 841 | /* Little helpers: write/read buffers free */ |
884b600f ON |
842 | static void acm_write_buffers_free(struct acm *acm) |
843 | { | |
844 | int i; | |
845 | struct acm_wb *wb; | |
846 | ||
86478944 | 847 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { |
884b600f ON |
848 | usb_buffer_free(acm->dev, acm->writesize, wb->buf, wb->dmah); |
849 | } | |
850 | } | |
851 | ||
830f4021 ON |
852 | static void acm_read_buffers_free(struct acm *acm) |
853 | { | |
854 | struct usb_device *usb_dev = interface_to_usbdev(acm->control); | |
855 | int i, n = acm->rx_buflimit; | |
856 | ||
857 | for (i = 0; i < n; i++) | |
858 | usb_buffer_free(usb_dev, acm->readsize, acm->rb[i].base, acm->rb[i].dma); | |
859 | } | |
860 | ||
884b600f ON |
861 | /* Little helper: write buffers allocate */ |
862 | static int acm_write_buffers_alloc(struct acm *acm) | |
863 | { | |
864 | int i; | |
865 | struct acm_wb *wb; | |
866 | ||
86478944 | 867 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { |
884b600f ON |
868 | wb->buf = usb_buffer_alloc(acm->dev, acm->writesize, GFP_KERNEL, |
869 | &wb->dmah); | |
870 | if (!wb->buf) { | |
871 | while (i != 0) { | |
872 | --i; | |
873 | --wb; | |
874 | usb_buffer_free(acm->dev, acm->writesize, | |
875 | wb->buf, wb->dmah); | |
876 | } | |
877 | return -ENOMEM; | |
878 | } | |
879 | } | |
880 | return 0; | |
881 | } | |
882 | ||
1da177e4 LT |
883 | static int acm_probe (struct usb_interface *intf, |
884 | const struct usb_device_id *id) | |
885 | { | |
886 | struct usb_cdc_union_desc *union_header = NULL; | |
c4cabd28 | 887 | struct usb_cdc_country_functional_desc *cfd = NULL; |
c6dbf554 | 888 | unsigned char *buffer = intf->altsetting->extra; |
1da177e4 LT |
889 | int buflen = intf->altsetting->extralen; |
890 | struct usb_interface *control_interface; | |
891 | struct usb_interface *data_interface; | |
892 | struct usb_endpoint_descriptor *epctrl; | |
893 | struct usb_endpoint_descriptor *epread; | |
894 | struct usb_endpoint_descriptor *epwrite; | |
895 | struct usb_device *usb_dev = interface_to_usbdev(intf); | |
896 | struct acm *acm; | |
897 | int minor; | |
898 | int ctrlsize,readsize; | |
899 | u8 *buf; | |
900 | u8 ac_management_function = 0; | |
901 | u8 call_management_function = 0; | |
902 | int call_interface_num = -1; | |
903 | int data_interface_num; | |
904 | unsigned long quirks; | |
86478944 | 905 | int num_rx_buf; |
61a87adf | 906 | int i; |
1da177e4 | 907 | |
86478944 | 908 | /* normal quirks */ |
1da177e4 | 909 | quirks = (unsigned long)id->driver_info; |
86478944 ON |
910 | num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; |
911 | ||
912 | /* handle quirks deadly to normal probing*/ | |
1da177e4 LT |
913 | if (quirks == NO_UNION_NORMAL) { |
914 | data_interface = usb_ifnum_to_if(usb_dev, 1); | |
915 | control_interface = usb_ifnum_to_if(usb_dev, 0); | |
916 | goto skip_normal_probe; | |
917 | } | |
918 | ||
919 | /* normal probing*/ | |
920 | if (!buffer) { | |
898eb71c | 921 | err("Weird descriptor references\n"); |
1da177e4 LT |
922 | return -EINVAL; |
923 | } | |
924 | ||
925 | if (!buflen) { | |
926 | if (intf->cur_altsetting->endpoint->extralen && intf->cur_altsetting->endpoint->extra) { | |
898eb71c | 927 | dev_dbg(&intf->dev,"Seeking extra descriptors on endpoint\n"); |
1da177e4 LT |
928 | buflen = intf->cur_altsetting->endpoint->extralen; |
929 | buffer = intf->cur_altsetting->endpoint->extra; | |
930 | } else { | |
931 | err("Zero length descriptor references\n"); | |
932 | return -EINVAL; | |
933 | } | |
934 | } | |
935 | ||
936 | while (buflen > 0) { | |
937 | if (buffer [1] != USB_DT_CS_INTERFACE) { | |
938 | err("skipping garbage\n"); | |
939 | goto next_desc; | |
940 | } | |
941 | ||
942 | switch (buffer [2]) { | |
943 | case USB_CDC_UNION_TYPE: /* we've found it */ | |
944 | if (union_header) { | |
945 | err("More than one union descriptor, skipping ..."); | |
946 | goto next_desc; | |
947 | } | |
948 | union_header = (struct usb_cdc_union_desc *) | |
949 | buffer; | |
950 | break; | |
c4cabd28 ON |
951 | case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ |
952 | cfd = (struct usb_cdc_country_functional_desc *)buffer; | |
953 | break; | |
1da177e4 LT |
954 | case USB_CDC_HEADER_TYPE: /* maybe check version */ |
955 | break; /* for now we ignore it */ | |
956 | case USB_CDC_ACM_TYPE: | |
957 | ac_management_function = buffer[3]; | |
958 | break; | |
959 | case USB_CDC_CALL_MANAGEMENT_TYPE: | |
960 | call_management_function = buffer[3]; | |
961 | call_interface_num = buffer[4]; | |
962 | if ((call_management_function & 3) != 3) | |
963 | err("This device cannot do calls on its own. It is no modem."); | |
964 | break; | |
1da177e4 | 965 | default: |
c6dbf554 DB |
966 | /* there are LOTS more CDC descriptors that |
967 | * could legitimately be found here. | |
968 | */ | |
969 | dev_dbg(&intf->dev, "Ignoring descriptor: " | |
970 | "type %02x, length %d\n", | |
971 | buffer[2], buffer[0]); | |
1da177e4 LT |
972 | break; |
973 | } | |
974 | next_desc: | |
975 | buflen -= buffer[0]; | |
976 | buffer += buffer[0]; | |
977 | } | |
978 | ||
979 | if (!union_header) { | |
980 | if (call_interface_num > 0) { | |
898eb71c | 981 | dev_dbg(&intf->dev,"No union descriptor, using call management descriptor\n"); |
1da177e4 LT |
982 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); |
983 | control_interface = intf; | |
984 | } else { | |
898eb71c | 985 | dev_dbg(&intf->dev,"No union descriptor, giving up\n"); |
1da177e4 LT |
986 | return -ENODEV; |
987 | } | |
988 | } else { | |
989 | control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); | |
990 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); | |
991 | if (!control_interface || !data_interface) { | |
898eb71c | 992 | dev_dbg(&intf->dev,"no interfaces\n"); |
1da177e4 LT |
993 | return -ENODEV; |
994 | } | |
995 | } | |
996 | ||
997 | if (data_interface_num != call_interface_num) | |
dc0d5c1e | 998 | dev_dbg(&intf->dev,"Separate call control interface. That is not fully supported.\n"); |
1da177e4 LT |
999 | |
1000 | skip_normal_probe: | |
1001 | ||
1002 | /*workaround for switched interfaces */ | |
1003 | if (data_interface->cur_altsetting->desc.bInterfaceClass != CDC_DATA_INTERFACE_TYPE) { | |
1004 | if (control_interface->cur_altsetting->desc.bInterfaceClass == CDC_DATA_INTERFACE_TYPE) { | |
1005 | struct usb_interface *t; | |
898eb71c | 1006 | dev_dbg(&intf->dev,"Your device has switched interfaces.\n"); |
1da177e4 LT |
1007 | |
1008 | t = control_interface; | |
1009 | control_interface = data_interface; | |
1010 | data_interface = t; | |
1011 | } else { | |
1012 | return -EINVAL; | |
1013 | } | |
1014 | } | |
74da5d68 AS |
1015 | |
1016 | /* Accept probe requests only for the control interface */ | |
1017 | if (intf != control_interface) | |
1018 | return -ENODEV; | |
1da177e4 LT |
1019 | |
1020 | if (usb_interface_claimed(data_interface)) { /* valid in this context */ | |
898eb71c | 1021 | dev_dbg(&intf->dev,"The data interface isn't available\n"); |
1da177e4 LT |
1022 | return -EBUSY; |
1023 | } | |
1024 | ||
1025 | ||
1026 | if (data_interface->cur_altsetting->desc.bNumEndpoints < 2) | |
1027 | return -EINVAL; | |
1028 | ||
1029 | epctrl = &control_interface->cur_altsetting->endpoint[0].desc; | |
1030 | epread = &data_interface->cur_altsetting->endpoint[0].desc; | |
1031 | epwrite = &data_interface->cur_altsetting->endpoint[1].desc; | |
1032 | ||
1033 | ||
1034 | /* workaround for switched endpoints */ | |
45aea704 | 1035 | if (!usb_endpoint_dir_in(epread)) { |
1da177e4 LT |
1036 | /* descriptors are swapped */ |
1037 | struct usb_endpoint_descriptor *t; | |
898eb71c | 1038 | dev_dbg(&intf->dev,"The data interface has switched endpoints\n"); |
1da177e4 LT |
1039 | |
1040 | t = epread; | |
1041 | epread = epwrite; | |
1042 | epwrite = t; | |
1043 | } | |
1044 | dbg("interfaces are valid"); | |
1045 | for (minor = 0; minor < ACM_TTY_MINORS && acm_table[minor]; minor++); | |
1046 | ||
1047 | if (minor == ACM_TTY_MINORS) { | |
1048 | err("no more free acm devices"); | |
1049 | return -ENODEV; | |
1050 | } | |
1051 | ||
46f116ea | 1052 | if (!(acm = kzalloc(sizeof(struct acm), GFP_KERNEL))) { |
898eb71c | 1053 | dev_dbg(&intf->dev, "out of memory (acm kzalloc)\n"); |
1da177e4 LT |
1054 | goto alloc_fail; |
1055 | } | |
1da177e4 LT |
1056 | |
1057 | ctrlsize = le16_to_cpu(epctrl->wMaxPacketSize); | |
86478944 | 1058 | readsize = le16_to_cpu(epread->wMaxPacketSize)* ( quirks == SINGLE_RX_URB ? 1 : 2); |
e4cf3aa8 | 1059 | acm->writesize = le16_to_cpu(epwrite->wMaxPacketSize) * 20; |
1da177e4 LT |
1060 | acm->control = control_interface; |
1061 | acm->data = data_interface; | |
1062 | acm->minor = minor; | |
1063 | acm->dev = usb_dev; | |
1064 | acm->ctrl_caps = ac_management_function; | |
1065 | acm->ctrlsize = ctrlsize; | |
1066 | acm->readsize = readsize; | |
86478944 | 1067 | acm->rx_buflimit = num_rx_buf; |
61a87adf DK |
1068 | acm->urb_task.func = acm_rx_tasklet; |
1069 | acm->urb_task.data = (unsigned long) acm; | |
c4028958 | 1070 | INIT_WORK(&acm->work, acm_softint); |
11ea859d | 1071 | INIT_WORK(&acm->waker, acm_waker); |
1da177e4 | 1072 | spin_lock_init(&acm->throttle_lock); |
884b600f | 1073 | spin_lock_init(&acm->write_lock); |
61a87adf | 1074 | spin_lock_init(&acm->read_lock); |
1365baf7 | 1075 | mutex_init(&acm->mutex); |
884b600f | 1076 | acm->write_ready = 1; |
61a87adf | 1077 | acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); |
1da177e4 LT |
1078 | |
1079 | buf = usb_buffer_alloc(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); | |
1080 | if (!buf) { | |
898eb71c | 1081 | dev_dbg(&intf->dev, "out of memory (ctrl buffer alloc)\n"); |
1da177e4 LT |
1082 | goto alloc_fail2; |
1083 | } | |
1084 | acm->ctrl_buffer = buf; | |
1085 | ||
884b600f | 1086 | if (acm_write_buffers_alloc(acm) < 0) { |
898eb71c | 1087 | dev_dbg(&intf->dev, "out of memory (write buffer alloc)\n"); |
1da177e4 LT |
1088 | goto alloc_fail4; |
1089 | } | |
1da177e4 LT |
1090 | |
1091 | acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); | |
1092 | if (!acm->ctrlurb) { | |
898eb71c | 1093 | dev_dbg(&intf->dev, "out of memory (ctrlurb kmalloc)\n"); |
1da177e4 LT |
1094 | goto alloc_fail5; |
1095 | } | |
86478944 | 1096 | for (i = 0; i < num_rx_buf; i++) { |
61a87adf DK |
1097 | struct acm_ru *rcv = &(acm->ru[i]); |
1098 | ||
1099 | if (!(rcv->urb = usb_alloc_urb(0, GFP_KERNEL))) { | |
898eb71c | 1100 | dev_dbg(&intf->dev, "out of memory (read urbs usb_alloc_urb)\n"); |
61a87adf DK |
1101 | goto alloc_fail7; |
1102 | } | |
1103 | ||
1104 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1105 | rcv->instance = acm; | |
1106 | } | |
86478944 | 1107 | for (i = 0; i < num_rx_buf; i++) { |
61a87adf DK |
1108 | struct acm_rb *buf = &(acm->rb[i]); |
1109 | ||
61a87adf | 1110 | if (!(buf->base = usb_buffer_alloc(acm->dev, readsize, GFP_KERNEL, &buf->dma))) { |
898eb71c | 1111 | dev_dbg(&intf->dev, "out of memory (read bufs usb_buffer_alloc)\n"); |
61a87adf DK |
1112 | goto alloc_fail7; |
1113 | } | |
1da177e4 | 1114 | } |
e4cf3aa8 DE |
1115 | for(i = 0; i < ACM_NW; i++) |
1116 | { | |
1117 | struct acm_wb *snd = &(acm->wb[i]); | |
1118 | ||
1119 | if (!(snd->urb = usb_alloc_urb(0, GFP_KERNEL))) { | |
1120 | dev_dbg(&intf->dev, "out of memory (write urbs usb_alloc_urb)"); | |
1121 | goto alloc_fail7; | |
1122 | } | |
1123 | ||
1124 | usb_fill_bulk_urb(snd->urb, usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), | |
1125 | NULL, acm->writesize, acm_write_bulk, snd); | |
1126 | snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1127 | snd->instance = acm; | |
1da177e4 LT |
1128 | } |
1129 | ||
c4cabd28 ON |
1130 | usb_set_intfdata (intf, acm); |
1131 | ||
1132 | i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); | |
1133 | if (i < 0) | |
1134 | goto alloc_fail8; | |
1135 | ||
1136 | if (cfd) { /* export the country data */ | |
1137 | acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); | |
1138 | if (!acm->country_codes) | |
1139 | goto skip_countries; | |
1140 | acm->country_code_size = cfd->bLength - 4; | |
1141 | memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, cfd->bLength - 4); | |
1142 | acm->country_rel_date = cfd->iCountryCodeRelDate; | |
1143 | ||
1144 | i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); | |
1145 | if (i < 0) { | |
1146 | kfree(acm->country_codes); | |
1147 | goto skip_countries; | |
1148 | } | |
1149 | ||
1150 | i = device_create_file(&intf->dev, &dev_attr_iCountryCodeRelDate); | |
1151 | if (i < 0) { | |
1152 | kfree(acm->country_codes); | |
1153 | goto skip_countries; | |
1154 | } | |
1155 | } | |
1156 | ||
1157 | skip_countries: | |
1da177e4 LT |
1158 | usb_fill_int_urb(acm->ctrlurb, usb_dev, usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), |
1159 | acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, epctrl->bInterval); | |
1160 | acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1161 | acm->ctrlurb->transfer_dma = acm->ctrl_dma; | |
1162 | ||
1da177e4 LT |
1163 | dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); |
1164 | ||
1165 | acm_set_control(acm, acm->ctrlout); | |
1166 | ||
1167 | acm->line.dwDTERate = cpu_to_le32(9600); | |
1168 | acm->line.bDataBits = 8; | |
1169 | acm_set_line(acm, &acm->line); | |
1170 | ||
1171 | usb_driver_claim_interface(&acm_driver, data_interface, acm); | |
1172 | ||
83ef344a | 1173 | usb_get_intf(control_interface); |
1174 | tty_register_device(acm_tty_driver, minor, &control_interface->dev); | |
1da177e4 LT |
1175 | |
1176 | acm_table[minor] = acm; | |
1da177e4 | 1177 | |
c4cabd28 ON |
1178 | return 0; |
1179 | alloc_fail8: | |
e4cf3aa8 DE |
1180 | for (i = 0; i < ACM_NW; i++) |
1181 | usb_free_urb(acm->wb[i].urb); | |
1da177e4 | 1182 | alloc_fail7: |
830f4021 | 1183 | acm_read_buffers_free(acm); |
86478944 | 1184 | for (i = 0; i < num_rx_buf; i++) |
61a87adf | 1185 | usb_free_urb(acm->ru[i].urb); |
1da177e4 LT |
1186 | usb_free_urb(acm->ctrlurb); |
1187 | alloc_fail5: | |
884b600f | 1188 | acm_write_buffers_free(acm); |
1da177e4 | 1189 | alloc_fail4: |
1da177e4 LT |
1190 | usb_buffer_free(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); |
1191 | alloc_fail2: | |
1192 | kfree(acm); | |
1193 | alloc_fail: | |
1194 | return -ENOMEM; | |
1195 | } | |
1196 | ||
1365baf7 ON |
1197 | static void stop_data_traffic(struct acm *acm) |
1198 | { | |
1199 | int i; | |
11ea859d | 1200 | dbg("Entering stop_data_traffic"); |
1365baf7 ON |
1201 | |
1202 | tasklet_disable(&acm->urb_task); | |
1203 | ||
1204 | usb_kill_urb(acm->ctrlurb); | |
e4cf3aa8 DE |
1205 | for(i = 0; i < ACM_NW; i++) |
1206 | usb_kill_urb(acm->wb[i].urb); | |
1365baf7 ON |
1207 | for (i = 0; i < acm->rx_buflimit; i++) |
1208 | usb_kill_urb(acm->ru[i].urb); | |
1209 | ||
1365baf7 ON |
1210 | tasklet_enable(&acm->urb_task); |
1211 | ||
1212 | cancel_work_sync(&acm->work); | |
11ea859d | 1213 | cancel_work_sync(&acm->waker); |
1365baf7 ON |
1214 | } |
1215 | ||
1da177e4 LT |
1216 | static void acm_disconnect(struct usb_interface *intf) |
1217 | { | |
c4cabd28 | 1218 | struct acm *acm = usb_get_intfdata(intf); |
1da177e4 | 1219 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
1da177e4 | 1220 | |
4186ecf8 | 1221 | mutex_lock(&open_mutex); |
830f4021 | 1222 | if (!acm || !acm->dev) { |
4186ecf8 | 1223 | mutex_unlock(&open_mutex); |
86067eea ON |
1224 | return; |
1225 | } | |
c4cabd28 | 1226 | if (acm->country_codes){ |
74da5d68 AS |
1227 | device_remove_file(&acm->control->dev, |
1228 | &dev_attr_wCountryCodes); | |
1229 | device_remove_file(&acm->control->dev, | |
1230 | &dev_attr_iCountryCodeRelDate); | |
c4cabd28 | 1231 | } |
74da5d68 | 1232 | device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); |
1da177e4 | 1233 | acm->dev = NULL; |
86067eea ON |
1234 | usb_set_intfdata(acm->control, NULL); |
1235 | usb_set_intfdata(acm->data, NULL); | |
1da177e4 | 1236 | |
1365baf7 | 1237 | stop_data_traffic(acm); |
1da177e4 | 1238 | |
884b600f | 1239 | acm_write_buffers_free(acm); |
1da177e4 | 1240 | usb_buffer_free(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); |
830f4021 | 1241 | acm_read_buffers_free(acm); |
1da177e4 | 1242 | |
830f4021 ON |
1243 | usb_driver_release_interface(&acm_driver, intf == acm->control ? |
1244 | acm->data : acm->control); | |
1da177e4 LT |
1245 | |
1246 | if (!acm->used) { | |
83ef344a | 1247 | acm_tty_unregister(acm); |
4186ecf8 | 1248 | mutex_unlock(&open_mutex); |
1da177e4 LT |
1249 | return; |
1250 | } | |
1251 | ||
4186ecf8 | 1252 | mutex_unlock(&open_mutex); |
1da177e4 LT |
1253 | |
1254 | if (acm->tty) | |
1255 | tty_hangup(acm->tty); | |
1256 | } | |
1257 | ||
1365baf7 ON |
1258 | static int acm_suspend(struct usb_interface *intf, pm_message_t message) |
1259 | { | |
1260 | struct acm *acm = usb_get_intfdata(intf); | |
11ea859d ON |
1261 | int cnt; |
1262 | ||
1263 | if (acm->dev->auto_pm) { | |
1264 | int b; | |
1265 | ||
1266 | spin_lock_irq(&acm->read_lock); | |
1267 | spin_lock(&acm->write_lock); | |
1268 | b = acm->processing + acm->transmitting; | |
1269 | spin_unlock(&acm->write_lock); | |
1270 | spin_unlock_irq(&acm->read_lock); | |
1271 | if (b) | |
1272 | return -EBUSY; | |
1273 | } | |
1274 | ||
1275 | spin_lock_irq(&acm->read_lock); | |
1276 | spin_lock(&acm->write_lock); | |
1277 | cnt = acm->susp_count++; | |
1278 | spin_unlock(&acm->write_lock); | |
1279 | spin_unlock_irq(&acm->read_lock); | |
1365baf7 | 1280 | |
11ea859d | 1281 | if (cnt) |
1365baf7 ON |
1282 | return 0; |
1283 | /* | |
1284 | we treat opened interfaces differently, | |
1285 | we must guard against open | |
1286 | */ | |
1287 | mutex_lock(&acm->mutex); | |
1288 | ||
1289 | if (acm->used) | |
1290 | stop_data_traffic(acm); | |
1291 | ||
1292 | mutex_unlock(&acm->mutex); | |
1293 | return 0; | |
1294 | } | |
1295 | ||
1296 | static int acm_resume(struct usb_interface *intf) | |
1297 | { | |
1298 | struct acm *acm = usb_get_intfdata(intf); | |
1299 | int rv = 0; | |
11ea859d | 1300 | int cnt; |
1365baf7 | 1301 | |
11ea859d ON |
1302 | spin_lock_irq(&acm->read_lock); |
1303 | acm->susp_count -= 1; | |
1304 | cnt = acm->susp_count; | |
1305 | spin_unlock_irq(&acm->read_lock); | |
1306 | ||
1307 | if (cnt) | |
1365baf7 ON |
1308 | return 0; |
1309 | ||
1310 | mutex_lock(&acm->mutex); | |
1311 | if (acm->used) { | |
1312 | rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO); | |
1313 | if (rv < 0) | |
11ea859d | 1314 | goto err_out; |
1365baf7 ON |
1315 | |
1316 | tasklet_schedule(&acm->urb_task); | |
1317 | } | |
1318 | ||
1319 | err_out: | |
1320 | mutex_unlock(&acm->mutex); | |
1321 | return rv; | |
1322 | } | |
1da177e4 LT |
1323 | /* |
1324 | * USB driver structure. | |
1325 | */ | |
1326 | ||
1327 | static struct usb_device_id acm_ids[] = { | |
1328 | /* quirky and broken devices */ | |
1329 | { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ | |
1330 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1331 | }, | |
b0e2a705 AA |
1332 | { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ |
1333 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1334 | }, | |
8753e65e MO |
1335 | { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ |
1336 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1337 | }, | |
91a9c921 CM |
1338 | { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ |
1339 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1340 | }, | |
86478944 ON |
1341 | { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ |
1342 | .driver_info = SINGLE_RX_URB, /* firmware bug */ | |
1343 | }, | |
3dd2ae81 ON |
1344 | { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ |
1345 | .driver_info = SINGLE_RX_URB, /* firmware bug */ | |
1346 | }, | |
9be8456c ON |
1347 | { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ |
1348 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1349 | }, | |
6149ed5e IM |
1350 | { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ |
1351 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1352 | }, | |
9be8456c | 1353 | |
1da177e4 LT |
1354 | /* control interfaces with various AT-command sets */ |
1355 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1356 | USB_CDC_ACM_PROTO_AT_V25TER) }, | |
1357 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1358 | USB_CDC_ACM_PROTO_AT_PCCA101) }, | |
1359 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1360 | USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, | |
1361 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1362 | USB_CDC_ACM_PROTO_AT_GSM) }, | |
1363 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1364 | USB_CDC_ACM_PROTO_AT_3G ) }, | |
1365 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1366 | USB_CDC_ACM_PROTO_AT_CDMA) }, | |
1367 | ||
1368 | /* NOTE: COMM/ACM/0xff is likely MSFT RNDIS ... NOT a modem!! */ | |
1369 | { } | |
1370 | }; | |
1371 | ||
1372 | MODULE_DEVICE_TABLE (usb, acm_ids); | |
1373 | ||
1374 | static struct usb_driver acm_driver = { | |
1da177e4 LT |
1375 | .name = "cdc_acm", |
1376 | .probe = acm_probe, | |
1377 | .disconnect = acm_disconnect, | |
1365baf7 ON |
1378 | .suspend = acm_suspend, |
1379 | .resume = acm_resume, | |
1da177e4 | 1380 | .id_table = acm_ids, |
1365baf7 | 1381 | .supports_autosuspend = 1, |
1da177e4 LT |
1382 | }; |
1383 | ||
1384 | /* | |
1385 | * TTY driver structures. | |
1386 | */ | |
1387 | ||
b68e31d0 | 1388 | static const struct tty_operations acm_ops = { |
1da177e4 LT |
1389 | .open = acm_tty_open, |
1390 | .close = acm_tty_close, | |
1391 | .write = acm_tty_write, | |
1392 | .write_room = acm_tty_write_room, | |
1393 | .ioctl = acm_tty_ioctl, | |
1394 | .throttle = acm_tty_throttle, | |
1395 | .unthrottle = acm_tty_unthrottle, | |
1396 | .chars_in_buffer = acm_tty_chars_in_buffer, | |
1397 | .break_ctl = acm_tty_break_ctl, | |
1398 | .set_termios = acm_tty_set_termios, | |
1399 | .tiocmget = acm_tty_tiocmget, | |
1400 | .tiocmset = acm_tty_tiocmset, | |
1401 | }; | |
1402 | ||
1403 | /* | |
1404 | * Init / exit. | |
1405 | */ | |
1406 | ||
1407 | static int __init acm_init(void) | |
1408 | { | |
1409 | int retval; | |
1410 | acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); | |
1411 | if (!acm_tty_driver) | |
1412 | return -ENOMEM; | |
1413 | acm_tty_driver->owner = THIS_MODULE, | |
1414 | acm_tty_driver->driver_name = "acm", | |
1415 | acm_tty_driver->name = "ttyACM", | |
1da177e4 LT |
1416 | acm_tty_driver->major = ACM_TTY_MAJOR, |
1417 | acm_tty_driver->minor_start = 0, | |
1418 | acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, | |
1419 | acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, | |
331b8319 | 1420 | acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
1da177e4 LT |
1421 | acm_tty_driver->init_termios = tty_std_termios; |
1422 | acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
1423 | tty_set_operations(acm_tty_driver, &acm_ops); | |
1424 | ||
1425 | retval = tty_register_driver(acm_tty_driver); | |
1426 | if (retval) { | |
1427 | put_tty_driver(acm_tty_driver); | |
1428 | return retval; | |
1429 | } | |
1430 | ||
1431 | retval = usb_register(&acm_driver); | |
1432 | if (retval) { | |
1433 | tty_unregister_driver(acm_tty_driver); | |
1434 | put_tty_driver(acm_tty_driver); | |
1435 | return retval; | |
1436 | } | |
1437 | ||
1438 | info(DRIVER_VERSION ":" DRIVER_DESC); | |
1439 | ||
1440 | return 0; | |
1441 | } | |
1442 | ||
1443 | static void __exit acm_exit(void) | |
1444 | { | |
1445 | usb_deregister(&acm_driver); | |
1446 | tty_unregister_driver(acm_tty_driver); | |
1447 | put_tty_driver(acm_tty_driver); | |
1448 | } | |
1449 | ||
1450 | module_init(acm_init); | |
1451 | module_exit(acm_exit); | |
1452 | ||
1453 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1454 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1455 | MODULE_LICENSE("GPL"); | |
1456 |