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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> | |
a2531293 | 5 | * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz> |
1da177e4 LT |
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 | |
6e47e069 AC |
19 | * v0.12 - added TIOCM ioctls, added break handling, made struct acm |
20 | * kmalloced | |
1da177e4 LT |
21 | * v0.13 - added termios, added hangup |
22 | * v0.14 - sized down struct acm | |
23 | * v0.15 - fixed flow control again - characters could be lost | |
24 | * v0.16 - added code for modems with swapped data and control interfaces | |
25 | * v0.17 - added new style probing | |
26 | * v0.18 - fixed new style probing for devices with more configurations | |
27 | * v0.19 - fixed CLOCAL handling (thanks to Richard Shih-Ping Chan) | |
28 | * v0.20 - switched to probing on interface (rather than device) class | |
29 | * v0.21 - revert to probing on device for devices with multiple configs | |
30 | * v0.22 - probe only the control interface. if usbcore doesn't choose the | |
31 | * config we want, sysadmin changes bConfigurationValue in sysfs. | |
32 | * v0.23 - use softirq for rx processing, as needed by tty layer | |
33 | * v0.24 - change probe method to evaluate CDC union descriptor | |
61a87adf | 34 | * v0.25 - downstream tasks paralelized to maximize throughput |
e4cf3aa8 | 35 | * v0.26 - multiple write urbs, writesize increased |
1da177e4 LT |
36 | */ |
37 | ||
38 | /* | |
39 | * This program is free software; you can redistribute it and/or modify | |
40 | * it under the terms of the GNU General Public License as published by | |
41 | * the Free Software Foundation; either version 2 of the License, or | |
42 | * (at your option) any later version. | |
43 | * | |
44 | * This program is distributed in the hope that it will be useful, | |
45 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
46 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
47 | * GNU General Public License for more details. | |
48 | * | |
49 | * You should have received a copy of the GNU General Public License | |
50 | * along with this program; if not, write to the Free Software | |
51 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
52 | */ | |
53 | ||
54 | #undef DEBUG | |
e5fbab51 | 55 | #undef VERBOSE_DEBUG |
1da177e4 LT |
56 | |
57 | #include <linux/kernel.h> | |
58 | #include <linux/errno.h> | |
59 | #include <linux/init.h> | |
60 | #include <linux/slab.h> | |
61 | #include <linux/tty.h> | |
7af25b4b | 62 | #include <linux/serial.h> |
1da177e4 LT |
63 | #include <linux/tty_driver.h> |
64 | #include <linux/tty_flip.h> | |
65 | #include <linux/module.h> | |
4186ecf8 | 66 | #include <linux/mutex.h> |
10077d4a | 67 | #include <linux/uaccess.h> |
1da177e4 | 68 | #include <linux/usb.h> |
a8c28f23 | 69 | #include <linux/usb/cdc.h> |
1da177e4 LT |
70 | #include <asm/byteorder.h> |
71 | #include <asm/unaligned.h> | |
61a87adf | 72 | #include <linux/list.h> |
1da177e4 LT |
73 | |
74 | #include "cdc-acm.h" | |
75 | ||
e5fbab51 DB |
76 | |
77 | #define ACM_CLOSE_TIMEOUT 15 /* seconds to let writes drain */ | |
78 | ||
1da177e4 LT |
79 | /* |
80 | * Version Information | |
81 | */ | |
e4cf3aa8 | 82 | #define DRIVER_VERSION "v0.26" |
61a87adf | 83 | #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek" |
1da177e4 LT |
84 | #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" |
85 | ||
86 | static struct usb_driver acm_driver; | |
87 | static struct tty_driver *acm_tty_driver; | |
88 | static struct acm *acm_table[ACM_TTY_MINORS]; | |
89 | ||
4186ecf8 | 90 | static DEFINE_MUTEX(open_mutex); |
1da177e4 | 91 | |
10077d4a | 92 | #define ACM_READY(acm) (acm && acm->dev && acm->port.count) |
1da177e4 | 93 | |
739e0285 AC |
94 | static const struct tty_port_operations acm_port_ops = { |
95 | }; | |
96 | ||
1da177e4 LT |
97 | /* |
98 | * Functions for ACM control messages. | |
99 | */ | |
100 | ||
6e47e069 AC |
101 | static int acm_ctrl_msg(struct acm *acm, int request, int value, |
102 | void *buf, int len) | |
1da177e4 LT |
103 | { |
104 | int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), | |
105 | request, USB_RT_ACM, value, | |
106 | acm->control->altsetting[0].desc.bInterfaceNumber, | |
107 | buf, len, 5000); | |
a5cc7ef9 JH |
108 | dev_dbg(&acm->control->dev, |
109 | "%s - rq 0x%02x, val %#x, len %#x, result %d\n", | |
110 | __func__, request, value, len, retval); | |
1da177e4 LT |
111 | return retval < 0 ? retval : 0; |
112 | } | |
113 | ||
114 | /* devices aren't required to support these requests. | |
115 | * the cdc acm descriptor tells whether they do... | |
116 | */ | |
117 | #define acm_set_control(acm, control) \ | |
118 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0) | |
119 | #define acm_set_line(acm, line) \ | |
120 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) | |
121 | #define acm_send_break(acm, ms) \ | |
122 | acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) | |
123 | ||
884b600f ON |
124 | /* |
125 | * Write buffer management. | |
126 | * All of these assume proper locks taken by the caller. | |
127 | */ | |
128 | ||
129 | static int acm_wb_alloc(struct acm *acm) | |
130 | { | |
131 | int i, wbn; | |
132 | struct acm_wb *wb; | |
133 | ||
e4cf3aa8 | 134 | wbn = 0; |
884b600f ON |
135 | i = 0; |
136 | for (;;) { | |
137 | wb = &acm->wb[wbn]; | |
138 | if (!wb->use) { | |
139 | wb->use = 1; | |
140 | return wbn; | |
141 | } | |
86478944 ON |
142 | wbn = (wbn + 1) % ACM_NW; |
143 | if (++i >= ACM_NW) | |
884b600f ON |
144 | return -1; |
145 | } | |
146 | } | |
147 | ||
884b600f ON |
148 | static int acm_wb_is_avail(struct acm *acm) |
149 | { | |
150 | int i, n; | |
e5fbab51 | 151 | unsigned long flags; |
884b600f | 152 | |
86478944 | 153 | n = ACM_NW; |
e5fbab51 | 154 | spin_lock_irqsave(&acm->write_lock, flags); |
6e47e069 | 155 | for (i = 0; i < ACM_NW; i++) |
86478944 | 156 | n -= acm->wb[i].use; |
e5fbab51 | 157 | spin_unlock_irqrestore(&acm->write_lock, flags); |
884b600f ON |
158 | return n; |
159 | } | |
160 | ||
884b600f | 161 | /* |
ad0b65ef | 162 | * Finish write. Caller must hold acm->write_lock |
884b600f | 163 | */ |
e4cf3aa8 | 164 | static void acm_write_done(struct acm *acm, struct acm_wb *wb) |
884b600f | 165 | { |
e4cf3aa8 | 166 | wb->use = 0; |
11ea859d | 167 | acm->transmitting--; |
97d35f95 | 168 | usb_autopm_put_interface_async(acm->control); |
884b600f ON |
169 | } |
170 | ||
171 | /* | |
172 | * Poke write. | |
11ea859d ON |
173 | * |
174 | * the caller is responsible for locking | |
884b600f | 175 | */ |
11ea859d ON |
176 | |
177 | static int acm_start_wb(struct acm *acm, struct acm_wb *wb) | |
178 | { | |
179 | int rc; | |
180 | ||
181 | acm->transmitting++; | |
182 | ||
183 | wb->urb->transfer_buffer = wb->buf; | |
184 | wb->urb->transfer_dma = wb->dmah; | |
185 | wb->urb->transfer_buffer_length = wb->len; | |
186 | wb->urb->dev = acm->dev; | |
187 | ||
6e47e069 AC |
188 | rc = usb_submit_urb(wb->urb, GFP_ATOMIC); |
189 | if (rc < 0) { | |
a5cc7ef9 JH |
190 | dev_err(&acm->data->dev, |
191 | "%s - usb_submit_urb(write bulk) failed: %d\n", | |
192 | __func__, rc); | |
11ea859d ON |
193 | acm_write_done(acm, wb); |
194 | } | |
195 | return rc; | |
196 | } | |
197 | ||
e4cf3aa8 | 198 | static int acm_write_start(struct acm *acm, int wbn) |
884b600f ON |
199 | { |
200 | unsigned long flags; | |
934da463 | 201 | struct acm_wb *wb = &acm->wb[wbn]; |
884b600f ON |
202 | int rc; |
203 | ||
204 | spin_lock_irqsave(&acm->write_lock, flags); | |
205 | if (!acm->dev) { | |
934da463 | 206 | wb->use = 0; |
884b600f ON |
207 | spin_unlock_irqrestore(&acm->write_lock, flags); |
208 | return -ENODEV; | |
209 | } | |
210 | ||
5e9e75f8 | 211 | dev_vdbg(&acm->data->dev, "%s - susp_count %d\n", __func__, |
a5cc7ef9 | 212 | acm->susp_count); |
97d35f95 | 213 | usb_autopm_get_interface_async(acm->control); |
11ea859d | 214 | if (acm->susp_count) { |
97d35f95 ON |
215 | if (!acm->delayed_wb) |
216 | acm->delayed_wb = wb; | |
217 | else | |
218 | usb_autopm_put_interface_async(acm->control); | |
11ea859d ON |
219 | spin_unlock_irqrestore(&acm->write_lock, flags); |
220 | return 0; /* A white lie */ | |
221 | } | |
222 | usb_mark_last_busy(acm->dev); | |
223 | ||
11ea859d | 224 | rc = acm_start_wb(acm, wb); |
884b600f ON |
225 | spin_unlock_irqrestore(&acm->write_lock, flags); |
226 | ||
884b600f | 227 | return rc; |
11ea859d | 228 | |
884b600f | 229 | } |
c4cabd28 ON |
230 | /* |
231 | * attributes exported through sysfs | |
232 | */ | |
233 | static ssize_t show_caps | |
234 | (struct device *dev, struct device_attribute *attr, char *buf) | |
235 | { | |
236 | struct usb_interface *intf = to_usb_interface(dev); | |
237 | struct acm *acm = usb_get_intfdata(intf); | |
238 | ||
239 | return sprintf(buf, "%d", acm->ctrl_caps); | |
240 | } | |
241 | static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL); | |
242 | ||
243 | static ssize_t show_country_codes | |
244 | (struct device *dev, struct device_attribute *attr, char *buf) | |
245 | { | |
246 | struct usb_interface *intf = to_usb_interface(dev); | |
247 | struct acm *acm = usb_get_intfdata(intf); | |
248 | ||
249 | memcpy(buf, acm->country_codes, acm->country_code_size); | |
250 | return acm->country_code_size; | |
251 | } | |
252 | ||
253 | static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL); | |
254 | ||
255 | static ssize_t show_country_rel_date | |
256 | (struct device *dev, struct device_attribute *attr, char *buf) | |
257 | { | |
258 | struct usb_interface *intf = to_usb_interface(dev); | |
259 | struct acm *acm = usb_get_intfdata(intf); | |
260 | ||
261 | return sprintf(buf, "%d", acm->country_rel_date); | |
262 | } | |
884b600f | 263 | |
c4cabd28 | 264 | static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL); |
1da177e4 LT |
265 | /* |
266 | * Interrupt handlers for various ACM device responses | |
267 | */ | |
268 | ||
269 | /* control interface reports status changes with "interrupt" transfers */ | |
7d12e780 | 270 | static void acm_ctrl_irq(struct urb *urb) |
1da177e4 LT |
271 | { |
272 | struct acm *acm = urb->context; | |
273 | struct usb_cdc_notification *dr = urb->transfer_buffer; | |
10077d4a | 274 | struct tty_struct *tty; |
1da177e4 LT |
275 | unsigned char *data; |
276 | int newctrl; | |
185d4058 GKH |
277 | int retval; |
278 | int status = urb->status; | |
1da177e4 | 279 | |
185d4058 | 280 | switch (status) { |
1da177e4 LT |
281 | case 0: |
282 | /* success */ | |
283 | break; | |
284 | case -ECONNRESET: | |
285 | case -ENOENT: | |
286 | case -ESHUTDOWN: | |
287 | /* this urb is terminated, clean up */ | |
a5cc7ef9 JH |
288 | dev_dbg(&acm->control->dev, |
289 | "%s - urb shutting down with status: %d\n", | |
290 | __func__, status); | |
1da177e4 LT |
291 | return; |
292 | default: | |
a5cc7ef9 JH |
293 | dev_dbg(&acm->control->dev, |
294 | "%s - nonzero urb status received: %d\n", | |
295 | __func__, status); | |
1da177e4 LT |
296 | goto exit; |
297 | } | |
298 | ||
299 | if (!ACM_READY(acm)) | |
300 | goto exit; | |
301 | ||
7e7797e7 JH |
302 | usb_mark_last_busy(acm->dev); |
303 | ||
1da177e4 LT |
304 | data = (unsigned char *)(dr + 1); |
305 | switch (dr->bNotificationType) { | |
6e47e069 | 306 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: |
a5cc7ef9 JH |
307 | dev_dbg(&acm->control->dev, "%s - network connection: %d\n", |
308 | __func__, dr->wValue); | |
6e47e069 | 309 | break; |
1da177e4 | 310 | |
6e47e069 AC |
311 | case USB_CDC_NOTIFY_SERIAL_STATE: |
312 | tty = tty_port_tty_get(&acm->port); | |
313 | newctrl = get_unaligned_le16(data); | |
1da177e4 | 314 | |
6e47e069 AC |
315 | if (tty) { |
316 | if (!acm->clocal && | |
317 | (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { | |
a5cc7ef9 JH |
318 | dev_dbg(&acm->control->dev, |
319 | "%s - calling hangup\n", __func__); | |
6e47e069 | 320 | tty_hangup(tty); |
1da177e4 | 321 | } |
6e47e069 AC |
322 | tty_kref_put(tty); |
323 | } | |
1da177e4 | 324 | |
6e47e069 | 325 | acm->ctrlin = newctrl; |
1da177e4 | 326 | |
a5cc7ef9 JH |
327 | dev_dbg(&acm->control->dev, |
328 | "%s - input control lines: dcd%c dsr%c break%c " | |
329 | "ring%c framing%c parity%c overrun%c\n", | |
330 | __func__, | |
6e47e069 AC |
331 | acm->ctrlin & ACM_CTRL_DCD ? '+' : '-', |
332 | acm->ctrlin & ACM_CTRL_DSR ? '+' : '-', | |
333 | acm->ctrlin & ACM_CTRL_BRK ? '+' : '-', | |
334 | acm->ctrlin & ACM_CTRL_RI ? '+' : '-', | |
335 | acm->ctrlin & ACM_CTRL_FRAMING ? '+' : '-', | |
336 | acm->ctrlin & ACM_CTRL_PARITY ? '+' : '-', | |
337 | acm->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-'); | |
1da177e4 LT |
338 | break; |
339 | ||
6e47e069 | 340 | default: |
a5cc7ef9 JH |
341 | dev_dbg(&acm->control->dev, |
342 | "%s - unknown notification %d received: index %d " | |
343 | "len %d data0 %d data1 %d\n", | |
344 | __func__, | |
6e47e069 AC |
345 | dr->bNotificationType, dr->wIndex, |
346 | dr->wLength, data[0], data[1]); | |
347 | break; | |
1da177e4 LT |
348 | } |
349 | exit: | |
6e47e069 | 350 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
185d4058 | 351 | if (retval) |
1d9846e5 JH |
352 | dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n", |
353 | __func__, retval); | |
1da177e4 LT |
354 | } |
355 | ||
356 | /* data interface returns incoming bytes, or we got unthrottled */ | |
7d12e780 | 357 | static void acm_read_bulk(struct urb *urb) |
1da177e4 | 358 | { |
61a87adf DK |
359 | struct acm_rb *buf; |
360 | struct acm_ru *rcv = urb->context; | |
361 | struct acm *acm = rcv->instance; | |
86478944 | 362 | int status = urb->status; |
185d4058 | 363 | |
5e9e75f8 | 364 | dev_vdbg(&acm->data->dev, "%s - status %d\n", __func__, status); |
1da177e4 | 365 | |
11ea859d | 366 | if (!ACM_READY(acm)) { |
1d9846e5 | 367 | dev_dbg(&acm->data->dev, "%s - acm not ready\n", __func__); |
1da177e4 | 368 | return; |
11ea859d ON |
369 | } |
370 | usb_mark_last_busy(acm->dev); | |
1da177e4 | 371 | |
86478944 | 372 | if (status) |
1d9846e5 JH |
373 | dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n", |
374 | __func__, status); | |
1da177e4 | 375 | |
61a87adf DK |
376 | buf = rcv->buffer; |
377 | buf->size = urb->actual_length; | |
378 | ||
86478944 ON |
379 | if (likely(status == 0)) { |
380 | spin_lock(&acm->read_lock); | |
11ea859d | 381 | acm->processing++; |
86478944 ON |
382 | list_add_tail(&rcv->list, &acm->spare_read_urbs); |
383 | list_add_tail(&buf->list, &acm->filled_read_bufs); | |
384 | spin_unlock(&acm->read_lock); | |
385 | } else { | |
386 | /* we drop the buffer due to an error */ | |
387 | spin_lock(&acm->read_lock); | |
388 | list_add_tail(&rcv->list, &acm->spare_read_urbs); | |
389 | list_add(&buf->list, &acm->spare_read_bufs); | |
390 | spin_unlock(&acm->read_lock); | |
391 | /* nevertheless the tasklet must be kicked unconditionally | |
392 | so the queue cannot dry up */ | |
393 | } | |
11ea859d ON |
394 | if (likely(!acm->susp_count)) |
395 | tasklet_schedule(&acm->urb_task); | |
1da177e4 LT |
396 | } |
397 | ||
398 | static void acm_rx_tasklet(unsigned long _acm) | |
399 | { | |
400 | struct acm *acm = (void *)_acm; | |
61a87adf | 401 | struct acm_rb *buf; |
10077d4a | 402 | struct tty_struct *tty; |
61a87adf | 403 | struct acm_ru *rcv; |
762f007b | 404 | unsigned long flags; |
ca79b7b4 | 405 | unsigned char throttled; |
11ea859d | 406 | |
5e9e75f8 | 407 | dev_vdbg(&acm->data->dev, "%s\n", __func__); |
1da177e4 | 408 | |
10077d4a | 409 | if (!ACM_READY(acm)) { |
a5cc7ef9 | 410 | dev_dbg(&acm->data->dev, "%s - acm not ready\n", __func__); |
ca79b7b4 | 411 | return; |
11ea859d | 412 | } |
ca79b7b4 | 413 | |
834dbca5 | 414 | spin_lock_irqsave(&acm->throttle_lock, flags); |
ca79b7b4 | 415 | throttled = acm->throttle; |
834dbca5 | 416 | spin_unlock_irqrestore(&acm->throttle_lock, flags); |
10077d4a | 417 | if (throttled) { |
a5cc7ef9 | 418 | dev_dbg(&acm->data->dev, "%s - throttled\n", __func__); |
61a87adf | 419 | return; |
11ea859d | 420 | } |
61a87adf | 421 | |
10077d4a AC |
422 | tty = tty_port_tty_get(&acm->port); |
423 | ||
61a87adf | 424 | next_buffer: |
762f007b | 425 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 426 | if (list_empty(&acm->filled_read_bufs)) { |
762f007b | 427 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf | 428 | goto urbs; |
1da177e4 | 429 | } |
61a87adf DK |
430 | buf = list_entry(acm->filled_read_bufs.next, |
431 | struct acm_rb, list); | |
432 | list_del(&buf->list); | |
762f007b | 433 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf | 434 | |
5e9e75f8 | 435 | dev_vdbg(&acm->data->dev, "%s - processing buf 0x%p, size = %d\n", |
a5cc7ef9 | 436 | __func__, buf, buf->size); |
10077d4a AC |
437 | if (tty) { |
438 | spin_lock_irqsave(&acm->throttle_lock, flags); | |
439 | throttled = acm->throttle; | |
440 | spin_unlock_irqrestore(&acm->throttle_lock, flags); | |
441 | if (!throttled) { | |
10077d4a AC |
442 | tty_insert_flip_string(tty, buf->base, buf->size); |
443 | tty_flip_buffer_push(tty); | |
444 | } else { | |
445 | tty_kref_put(tty); | |
a5cc7ef9 JH |
446 | dev_dbg(&acm->data->dev, "%s - throttling noticed\n", |
447 | __func__); | |
10077d4a AC |
448 | spin_lock_irqsave(&acm->read_lock, flags); |
449 | list_add(&buf->list, &acm->filled_read_bufs); | |
450 | spin_unlock_irqrestore(&acm->read_lock, flags); | |
451 | return; | |
452 | } | |
1da177e4 | 453 | } |
1da177e4 | 454 | |
762f007b | 455 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 456 | list_add(&buf->list, &acm->spare_read_bufs); |
762f007b | 457 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf DK |
458 | goto next_buffer; |
459 | ||
460 | urbs: | |
10077d4a AC |
461 | tty_kref_put(tty); |
462 | ||
61a87adf | 463 | while (!list_empty(&acm->spare_read_bufs)) { |
762f007b | 464 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 465 | if (list_empty(&acm->spare_read_urbs)) { |
11ea859d | 466 | acm->processing = 0; |
762f007b | 467 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf DK |
468 | return; |
469 | } | |
470 | rcv = list_entry(acm->spare_read_urbs.next, | |
471 | struct acm_ru, list); | |
472 | list_del(&rcv->list); | |
762f007b | 473 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf DK |
474 | |
475 | buf = list_entry(acm->spare_read_bufs.next, | |
476 | struct acm_rb, list); | |
477 | list_del(&buf->list); | |
478 | ||
479 | rcv->buffer = buf; | |
480 | ||
cf7fdd57 | 481 | if (acm->is_int_ep) |
5186ffee AL |
482 | usb_fill_int_urb(rcv->urb, acm->dev, |
483 | acm->rx_endpoint, | |
484 | buf->base, | |
485 | acm->readsize, | |
cf7fdd57 | 486 | acm_read_bulk, rcv, acm->bInterval); |
5186ffee AL |
487 | else |
488 | usb_fill_bulk_urb(rcv->urb, acm->dev, | |
489 | acm->rx_endpoint, | |
490 | buf->base, | |
491 | acm->readsize, | |
492 | acm_read_bulk, rcv); | |
61a87adf DK |
493 | rcv->urb->transfer_dma = buf->dma; |
494 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
495 | ||
6e47e069 AC |
496 | /* This shouldn't kill the driver as unsuccessful URBs are |
497 | returned to the free-urbs-pool and resubmited ASAP */ | |
11ea859d | 498 | spin_lock_irqsave(&acm->read_lock, flags); |
6e47e069 AC |
499 | if (acm->susp_count || |
500 | usb_submit_urb(rcv->urb, GFP_ATOMIC) < 0) { | |
61a87adf | 501 | list_add(&buf->list, &acm->spare_read_bufs); |
61a87adf | 502 | list_add(&rcv->list, &acm->spare_read_urbs); |
11ea859d | 503 | acm->processing = 0; |
762f007b | 504 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf | 505 | return; |
11ea859d ON |
506 | } else { |
507 | spin_unlock_irqrestore(&acm->read_lock, flags); | |
5e9e75f8 | 508 | dev_vdbg(&acm->data->dev, |
a5cc7ef9 JH |
509 | "%s - sending urb 0x%p, rcv 0x%p, buf 0x%p\n", |
510 | __func__, rcv->urb, rcv, buf); | |
61a87adf DK |
511 | } |
512 | } | |
11ea859d ON |
513 | spin_lock_irqsave(&acm->read_lock, flags); |
514 | acm->processing = 0; | |
515 | spin_unlock_irqrestore(&acm->read_lock, flags); | |
1da177e4 LT |
516 | } |
517 | ||
518 | /* data interface wrote those outgoing bytes */ | |
7d12e780 | 519 | static void acm_write_bulk(struct urb *urb) |
1da177e4 | 520 | { |
cdc97792 | 521 | struct acm_wb *wb = urb->context; |
e5fbab51 | 522 | struct acm *acm = wb->instance; |
ad0b65ef | 523 | unsigned long flags; |
1da177e4 | 524 | |
4fa4626c JH |
525 | if (urb->status || (urb->actual_length != urb->transfer_buffer_length)) |
526 | dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n", | |
1d9846e5 | 527 | __func__, |
e5fbab51 DB |
528 | urb->actual_length, |
529 | urb->transfer_buffer_length, | |
530 | urb->status); | |
1da177e4 | 531 | |
ad0b65ef | 532 | spin_lock_irqsave(&acm->write_lock, flags); |
e4cf3aa8 | 533 | acm_write_done(acm, wb); |
ad0b65ef | 534 | spin_unlock_irqrestore(&acm->write_lock, flags); |
884b600f ON |
535 | if (ACM_READY(acm)) |
536 | schedule_work(&acm->work); | |
e5fbab51 DB |
537 | else |
538 | wake_up_interruptible(&acm->drain_wait); | |
1da177e4 LT |
539 | } |
540 | ||
c4028958 | 541 | static void acm_softint(struct work_struct *work) |
1da177e4 | 542 | { |
c4028958 | 543 | struct acm *acm = container_of(work, struct acm, work); |
10077d4a | 544 | struct tty_struct *tty; |
e5fbab51 | 545 | |
1d9846e5 JH |
546 | dev_vdbg(&acm->data->dev, "%s\n", __func__); |
547 | ||
1da177e4 LT |
548 | if (!ACM_READY(acm)) |
549 | return; | |
10077d4a | 550 | tty = tty_port_tty_get(&acm->port); |
15e5bee3 JH |
551 | if (!tty) |
552 | return; | |
10077d4a AC |
553 | tty_wakeup(tty); |
554 | tty_kref_put(tty); | |
1da177e4 LT |
555 | } |
556 | ||
557 | /* | |
558 | * TTY handlers | |
559 | */ | |
560 | ||
561 | static int acm_tty_open(struct tty_struct *tty, struct file *filp) | |
562 | { | |
563 | struct acm *acm; | |
42dd2aa6 | 564 | int rv = -ENODEV; |
61a87adf | 565 | int i; |
4186ecf8 AV |
566 | |
567 | mutex_lock(&open_mutex); | |
1da177e4 LT |
568 | |
569 | acm = acm_table[tty->index]; | |
570 | if (!acm || !acm->dev) | |
2b626dc1 | 571 | goto out; |
1da177e4 LT |
572 | else |
573 | rv = 0; | |
574 | ||
a5cc7ef9 JH |
575 | dev_dbg(&acm->control->dev, "%s\n", __func__); |
576 | ||
28d1dfad | 577 | set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); |
10077d4a | 578 | |
1da177e4 | 579 | tty->driver_data = acm; |
10077d4a | 580 | tty_port_tty_set(&acm->port, tty); |
1da177e4 | 581 | |
94409cc1 ON |
582 | if (usb_autopm_get_interface(acm->control) < 0) |
583 | goto early_bail; | |
11ea859d ON |
584 | else |
585 | acm->control->needs_remote_wakeup = 1; | |
1365baf7 ON |
586 | |
587 | mutex_lock(&acm->mutex); | |
10077d4a | 588 | if (acm->port.count++) { |
2b626dc1 | 589 | mutex_unlock(&acm->mutex); |
1365baf7 | 590 | usb_autopm_put_interface(acm->control); |
2b626dc1 | 591 | goto out; |
10077d4a | 592 | } |
1365baf7 | 593 | |
1da177e4 LT |
594 | acm->ctrlurb->dev = acm->dev; |
595 | if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) { | |
a5cc7ef9 JH |
596 | dev_err(&acm->control->dev, |
597 | "%s - usb_submit_urb(ctrl irq) failed\n", __func__); | |
1da177e4 LT |
598 | goto bail_out; |
599 | } | |
600 | ||
ca79b7b4 ON |
601 | if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) && |
602 | (acm->ctrl_caps & USB_CDC_CAP_LINE)) | |
1da177e4 | 603 | goto full_bailout; |
10077d4a | 604 | |
11ea859d | 605 | usb_autopm_put_interface(acm->control); |
1da177e4 | 606 | |
61a87adf DK |
607 | INIT_LIST_HEAD(&acm->spare_read_urbs); |
608 | INIT_LIST_HEAD(&acm->spare_read_bufs); | |
609 | INIT_LIST_HEAD(&acm->filled_read_bufs); | |
6e47e069 AC |
610 | |
611 | for (i = 0; i < acm->rx_buflimit; i++) | |
61a87adf | 612 | list_add(&(acm->ru[i].list), &acm->spare_read_urbs); |
6e47e069 | 613 | for (i = 0; i < acm->rx_buflimit; i++) |
61a87adf | 614 | list_add(&(acm->rb[i].list), &acm->spare_read_bufs); |
61a87adf | 615 | |
ca79b7b4 ON |
616 | acm->throttle = 0; |
617 | ||
7af25b4b | 618 | set_bit(ASYNCB_INITIALIZED, &acm->port.flags); |
10077d4a | 619 | rv = tty_port_block_til_ready(&acm->port, tty, filp); |
18a77b5d | 620 | tasklet_schedule(&acm->urb_task); |
2b626dc1 | 621 | |
1365baf7 | 622 | mutex_unlock(&acm->mutex); |
2b626dc1 | 623 | out: |
94409cc1 | 624 | mutex_unlock(&open_mutex); |
1da177e4 LT |
625 | return rv; |
626 | ||
627 | full_bailout: | |
1da177e4 LT |
628 | usb_kill_urb(acm->ctrlurb); |
629 | bail_out: | |
10077d4a | 630 | acm->port.count--; |
1365baf7 | 631 | mutex_unlock(&acm->mutex); |
2b626dc1 | 632 | usb_autopm_put_interface(acm->control); |
94409cc1 ON |
633 | early_bail: |
634 | mutex_unlock(&open_mutex); | |
10077d4a | 635 | tty_port_tty_set(&acm->port, NULL); |
1da177e4 LT |
636 | return -EIO; |
637 | } | |
638 | ||
83ef344a | 639 | static void acm_tty_unregister(struct acm *acm) |
640 | { | |
10077d4a | 641 | int i, nr; |
61a87adf | 642 | |
86478944 | 643 | nr = acm->rx_buflimit; |
83ef344a | 644 | tty_unregister_device(acm_tty_driver, acm->minor); |
645 | usb_put_intf(acm->control); | |
646 | acm_table[acm->minor] = NULL; | |
647 | usb_free_urb(acm->ctrlurb); | |
e4cf3aa8 DE |
648 | for (i = 0; i < ACM_NW; i++) |
649 | usb_free_urb(acm->wb[i].urb); | |
86478944 | 650 | for (i = 0; i < nr; i++) |
61a87adf | 651 | usb_free_urb(acm->ru[i].urb); |
c4cabd28 | 652 | kfree(acm->country_codes); |
83ef344a | 653 | kfree(acm); |
654 | } | |
655 | ||
e5fbab51 DB |
656 | static int acm_tty_chars_in_buffer(struct tty_struct *tty); |
657 | ||
4e608671 | 658 | static void acm_port_down(struct acm *acm) |
10077d4a AC |
659 | { |
660 | int i, nr = acm->rx_buflimit; | |
661 | mutex_lock(&open_mutex); | |
662 | if (acm->dev) { | |
663 | usb_autopm_get_interface(acm->control); | |
664 | acm_set_control(acm, acm->ctrlout = 0); | |
10077d4a AC |
665 | usb_kill_urb(acm->ctrlurb); |
666 | for (i = 0; i < ACM_NW; i++) | |
667 | usb_kill_urb(acm->wb[i].urb); | |
23b80550 | 668 | tasklet_disable(&acm->urb_task); |
10077d4a AC |
669 | for (i = 0; i < nr; i++) |
670 | usb_kill_urb(acm->ru[i].urb); | |
23b80550 | 671 | tasklet_enable(&acm->urb_task); |
10077d4a AC |
672 | acm->control->needs_remote_wakeup = 0; |
673 | usb_autopm_put_interface(acm->control); | |
674 | } | |
675 | mutex_unlock(&open_mutex); | |
676 | } | |
677 | ||
678 | static void acm_tty_hangup(struct tty_struct *tty) | |
679 | { | |
680 | struct acm *acm = tty->driver_data; | |
681 | tty_port_hangup(&acm->port); | |
4e608671 | 682 | acm_port_down(acm); |
10077d4a AC |
683 | } |
684 | ||
1da177e4 LT |
685 | static void acm_tty_close(struct tty_struct *tty, struct file *filp) |
686 | { | |
687 | struct acm *acm = tty->driver_data; | |
688 | ||
10077d4a AC |
689 | /* Perform the closing process and see if we need to do the hardware |
690 | shutdown */ | |
051522bb | 691 | if (!acm) |
1da177e4 | 692 | return; |
051522bb FL |
693 | if (tty_port_close_start(&acm->port, tty, filp) == 0) { |
694 | mutex_lock(&open_mutex); | |
695 | if (!acm->dev) { | |
696 | tty_port_tty_set(&acm->port, NULL); | |
697 | acm_tty_unregister(acm); | |
698 | tty->driver_data = NULL; | |
699 | } | |
700 | mutex_unlock(&open_mutex); | |
701 | return; | |
702 | } | |
4e608671 | 703 | acm_port_down(acm); |
10077d4a | 704 | tty_port_close_end(&acm->port, tty); |
10077d4a | 705 | tty_port_tty_set(&acm->port, NULL); |
1da177e4 LT |
706 | } |
707 | ||
6e47e069 AC |
708 | static int acm_tty_write(struct tty_struct *tty, |
709 | const unsigned char *buf, int count) | |
1da177e4 LT |
710 | { |
711 | struct acm *acm = tty->driver_data; | |
712 | int stat; | |
884b600f ON |
713 | unsigned long flags; |
714 | int wbn; | |
715 | struct acm_wb *wb; | |
716 | ||
1da177e4 LT |
717 | if (!ACM_READY(acm)) |
718 | return -EINVAL; | |
1da177e4 LT |
719 | if (!count) |
720 | return 0; | |
721 | ||
5e9e75f8 | 722 | dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count); |
a5cc7ef9 | 723 | |
884b600f | 724 | spin_lock_irqsave(&acm->write_lock, flags); |
6e47e069 AC |
725 | wbn = acm_wb_alloc(acm); |
726 | if (wbn < 0) { | |
884b600f | 727 | spin_unlock_irqrestore(&acm->write_lock, flags); |
884b600f ON |
728 | return 0; |
729 | } | |
730 | wb = &acm->wb[wbn]; | |
1da177e4 | 731 | |
884b600f | 732 | count = (count > acm->writesize) ? acm->writesize : count; |
5e9e75f8 | 733 | dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count); |
884b600f ON |
734 | memcpy(wb->buf, buf, count); |
735 | wb->len = count; | |
736 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
1da177e4 | 737 | |
6e47e069 AC |
738 | stat = acm_write_start(acm, wbn); |
739 | if (stat < 0) | |
1da177e4 | 740 | return stat; |
1da177e4 LT |
741 | return count; |
742 | } | |
743 | ||
744 | static int acm_tty_write_room(struct tty_struct *tty) | |
745 | { | |
746 | struct acm *acm = tty->driver_data; | |
747 | if (!ACM_READY(acm)) | |
748 | return -EINVAL; | |
884b600f ON |
749 | /* |
750 | * Do not let the line discipline to know that we have a reserve, | |
751 | * or it might get too enthusiastic. | |
752 | */ | |
934da463 | 753 | return acm_wb_is_avail(acm) ? acm->writesize : 0; |
1da177e4 LT |
754 | } |
755 | ||
756 | static int acm_tty_chars_in_buffer(struct tty_struct *tty) | |
757 | { | |
758 | struct acm *acm = tty->driver_data; | |
759 | if (!ACM_READY(acm)) | |
23198fda | 760 | return 0; |
884b600f ON |
761 | /* |
762 | * This is inaccurate (overcounts), but it works. | |
763 | */ | |
86478944 | 764 | return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; |
1da177e4 LT |
765 | } |
766 | ||
767 | static void acm_tty_throttle(struct tty_struct *tty) | |
768 | { | |
769 | struct acm *acm = tty->driver_data; | |
770 | if (!ACM_READY(acm)) | |
771 | return; | |
772 | spin_lock_bh(&acm->throttle_lock); | |
773 | acm->throttle = 1; | |
774 | spin_unlock_bh(&acm->throttle_lock); | |
775 | } | |
776 | ||
777 | static void acm_tty_unthrottle(struct tty_struct *tty) | |
778 | { | |
779 | struct acm *acm = tty->driver_data; | |
780 | if (!ACM_READY(acm)) | |
781 | return; | |
782 | spin_lock_bh(&acm->throttle_lock); | |
783 | acm->throttle = 0; | |
784 | spin_unlock_bh(&acm->throttle_lock); | |
61a87adf | 785 | tasklet_schedule(&acm->urb_task); |
1da177e4 LT |
786 | } |
787 | ||
9e98966c | 788 | static int acm_tty_break_ctl(struct tty_struct *tty, int state) |
1da177e4 LT |
789 | { |
790 | struct acm *acm = tty->driver_data; | |
9e98966c | 791 | int retval; |
1da177e4 | 792 | if (!ACM_READY(acm)) |
9e98966c AC |
793 | return -EINVAL; |
794 | retval = acm_send_break(acm, state ? 0xffff : 0); | |
795 | if (retval < 0) | |
a5cc7ef9 JH |
796 | dev_dbg(&acm->control->dev, "%s - send break failed\n", |
797 | __func__); | |
9e98966c | 798 | return retval; |
1da177e4 LT |
799 | } |
800 | ||
60b33c13 | 801 | static int acm_tty_tiocmget(struct tty_struct *tty) |
1da177e4 LT |
802 | { |
803 | struct acm *acm = tty->driver_data; | |
804 | ||
805 | if (!ACM_READY(acm)) | |
806 | return -EINVAL; | |
807 | ||
808 | return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | | |
809 | (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | | |
810 | (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | | |
811 | (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | | |
812 | (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | | |
813 | TIOCM_CTS; | |
814 | } | |
815 | ||
20b9d177 | 816 | static int acm_tty_tiocmset(struct tty_struct *tty, |
1da177e4 LT |
817 | unsigned int set, unsigned int clear) |
818 | { | |
819 | struct acm *acm = tty->driver_data; | |
820 | unsigned int newctrl; | |
821 | ||
822 | if (!ACM_READY(acm)) | |
823 | return -EINVAL; | |
824 | ||
825 | newctrl = acm->ctrlout; | |
6e47e069 AC |
826 | set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | |
827 | (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); | |
828 | clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | | |
829 | (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); | |
1da177e4 LT |
830 | |
831 | newctrl = (newctrl & ~clear) | set; | |
832 | ||
833 | if (acm->ctrlout == newctrl) | |
834 | return 0; | |
835 | return acm_set_control(acm, acm->ctrlout = newctrl); | |
836 | } | |
837 | ||
6caa76b7 | 838 | static int acm_tty_ioctl(struct tty_struct *tty, |
6e47e069 | 839 | unsigned int cmd, unsigned long arg) |
1da177e4 LT |
840 | { |
841 | struct acm *acm = tty->driver_data; | |
842 | ||
843 | if (!ACM_READY(acm)) | |
844 | return -EINVAL; | |
845 | ||
846 | return -ENOIOCTLCMD; | |
847 | } | |
848 | ||
4c4c9432 | 849 | static const __u32 acm_tty_speed[] = { |
1da177e4 LT |
850 | 0, 50, 75, 110, 134, 150, 200, 300, 600, |
851 | 1200, 1800, 2400, 4800, 9600, 19200, 38400, | |
852 | 57600, 115200, 230400, 460800, 500000, 576000, | |
853 | 921600, 1000000, 1152000, 1500000, 2000000, | |
854 | 2500000, 3000000, 3500000, 4000000 | |
855 | }; | |
856 | ||
4c4c9432 | 857 | static const __u8 acm_tty_size[] = { |
1da177e4 LT |
858 | 5, 6, 7, 8 |
859 | }; | |
860 | ||
6e47e069 AC |
861 | static void acm_tty_set_termios(struct tty_struct *tty, |
862 | struct ktermios *termios_old) | |
1da177e4 LT |
863 | { |
864 | struct acm *acm = tty->driver_data; | |
606d099c | 865 | struct ktermios *termios = tty->termios; |
1da177e4 LT |
866 | struct usb_cdc_line_coding newline; |
867 | int newctrl = acm->ctrlout; | |
868 | ||
869 | if (!ACM_READY(acm)) | |
870 | return; | |
871 | ||
9b80fee1 | 872 | newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); |
1da177e4 LT |
873 | newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; |
874 | newline.bParityType = termios->c_cflag & PARENB ? | |
6e47e069 AC |
875 | (termios->c_cflag & PARODD ? 1 : 2) + |
876 | (termios->c_cflag & CMSPAR ? 2 : 0) : 0; | |
1da177e4 | 877 | newline.bDataBits = acm_tty_size[(termios->c_cflag & CSIZE) >> 4]; |
6e47e069 | 878 | /* FIXME: Needs to clear unsupported bits in the termios */ |
1da177e4 LT |
879 | acm->clocal = ((termios->c_cflag & CLOCAL) != 0); |
880 | ||
881 | if (!newline.dwDTERate) { | |
882 | newline.dwDTERate = acm->line.dwDTERate; | |
883 | newctrl &= ~ACM_CTRL_DTR; | |
6e47e069 AC |
884 | } else |
885 | newctrl |= ACM_CTRL_DTR; | |
1da177e4 LT |
886 | |
887 | if (newctrl != acm->ctrlout) | |
888 | acm_set_control(acm, acm->ctrlout = newctrl); | |
889 | ||
890 | if (memcmp(&acm->line, &newline, sizeof newline)) { | |
891 | memcpy(&acm->line, &newline, sizeof newline); | |
a5cc7ef9 JH |
892 | dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", |
893 | __func__, | |
894 | le32_to_cpu(newline.dwDTERate), | |
1da177e4 LT |
895 | newline.bCharFormat, newline.bParityType, |
896 | newline.bDataBits); | |
897 | acm_set_line(acm, &acm->line); | |
898 | } | |
899 | } | |
900 | ||
901 | /* | |
902 | * USB probe and disconnect routines. | |
903 | */ | |
904 | ||
830f4021 | 905 | /* Little helpers: write/read buffers free */ |
884b600f ON |
906 | static void acm_write_buffers_free(struct acm *acm) |
907 | { | |
908 | int i; | |
909 | struct acm_wb *wb; | |
a496c64f | 910 | struct usb_device *usb_dev = interface_to_usbdev(acm->control); |
884b600f | 911 | |
6e47e069 | 912 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) |
997ea58e | 913 | usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah); |
884b600f ON |
914 | } |
915 | ||
830f4021 ON |
916 | static void acm_read_buffers_free(struct acm *acm) |
917 | { | |
918 | struct usb_device *usb_dev = interface_to_usbdev(acm->control); | |
919 | int i, n = acm->rx_buflimit; | |
920 | ||
921 | for (i = 0; i < n; i++) | |
997ea58e DM |
922 | usb_free_coherent(usb_dev, acm->readsize, |
923 | acm->rb[i].base, acm->rb[i].dma); | |
830f4021 ON |
924 | } |
925 | ||
884b600f ON |
926 | /* Little helper: write buffers allocate */ |
927 | static int acm_write_buffers_alloc(struct acm *acm) | |
928 | { | |
929 | int i; | |
930 | struct acm_wb *wb; | |
931 | ||
86478944 | 932 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { |
997ea58e | 933 | wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, |
884b600f ON |
934 | &wb->dmah); |
935 | if (!wb->buf) { | |
936 | while (i != 0) { | |
937 | --i; | |
938 | --wb; | |
997ea58e | 939 | usb_free_coherent(acm->dev, acm->writesize, |
884b600f ON |
940 | wb->buf, wb->dmah); |
941 | } | |
942 | return -ENOMEM; | |
943 | } | |
944 | } | |
945 | return 0; | |
946 | } | |
947 | ||
10077d4a AC |
948 | static int acm_probe(struct usb_interface *intf, |
949 | const struct usb_device_id *id) | |
1da177e4 LT |
950 | { |
951 | struct usb_cdc_union_desc *union_header = NULL; | |
c4cabd28 | 952 | struct usb_cdc_country_functional_desc *cfd = NULL; |
c6dbf554 | 953 | unsigned char *buffer = intf->altsetting->extra; |
1da177e4 LT |
954 | int buflen = intf->altsetting->extralen; |
955 | struct usb_interface *control_interface; | |
956 | struct usb_interface *data_interface; | |
a2bfb4a3 ON |
957 | struct usb_endpoint_descriptor *epctrl = NULL; |
958 | struct usb_endpoint_descriptor *epread = NULL; | |
959 | struct usb_endpoint_descriptor *epwrite = NULL; | |
1da177e4 LT |
960 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
961 | struct acm *acm; | |
962 | int minor; | |
6e47e069 | 963 | int ctrlsize, readsize; |
1da177e4 LT |
964 | u8 *buf; |
965 | u8 ac_management_function = 0; | |
966 | u8 call_management_function = 0; | |
967 | int call_interface_num = -1; | |
968 | int data_interface_num; | |
969 | unsigned long quirks; | |
86478944 | 970 | int num_rx_buf; |
61a87adf | 971 | int i; |
a2bfb4a3 | 972 | int combined_interfaces = 0; |
1da177e4 | 973 | |
86478944 | 974 | /* normal quirks */ |
1da177e4 | 975 | quirks = (unsigned long)id->driver_info; |
86478944 ON |
976 | num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; |
977 | ||
978 | /* handle quirks deadly to normal probing*/ | |
1da177e4 LT |
979 | if (quirks == NO_UNION_NORMAL) { |
980 | data_interface = usb_ifnum_to_if(usb_dev, 1); | |
981 | control_interface = usb_ifnum_to_if(usb_dev, 0); | |
982 | goto skip_normal_probe; | |
983 | } | |
6e47e069 | 984 | |
1da177e4 LT |
985 | /* normal probing*/ |
986 | if (!buffer) { | |
9908a32e | 987 | dev_err(&intf->dev, "Weird descriptor references\n"); |
1da177e4 LT |
988 | return -EINVAL; |
989 | } | |
990 | ||
991 | if (!buflen) { | |
577045c0 TG |
992 | if (intf->cur_altsetting->endpoint && |
993 | intf->cur_altsetting->endpoint->extralen && | |
6e47e069 AC |
994 | intf->cur_altsetting->endpoint->extra) { |
995 | dev_dbg(&intf->dev, | |
996 | "Seeking extra descriptors on endpoint\n"); | |
1da177e4 LT |
997 | buflen = intf->cur_altsetting->endpoint->extralen; |
998 | buffer = intf->cur_altsetting->endpoint->extra; | |
999 | } else { | |
9908a32e GKH |
1000 | dev_err(&intf->dev, |
1001 | "Zero length descriptor references\n"); | |
1da177e4 LT |
1002 | return -EINVAL; |
1003 | } | |
1004 | } | |
1005 | ||
1006 | while (buflen > 0) { | |
6e47e069 | 1007 | if (buffer[1] != USB_DT_CS_INTERFACE) { |
9908a32e | 1008 | dev_err(&intf->dev, "skipping garbage\n"); |
1da177e4 LT |
1009 | goto next_desc; |
1010 | } | |
1011 | ||
6e47e069 AC |
1012 | switch (buffer[2]) { |
1013 | case USB_CDC_UNION_TYPE: /* we've found it */ | |
1014 | if (union_header) { | |
1015 | dev_err(&intf->dev, "More than one " | |
1016 | "union descriptor, skipping ...\n"); | |
1017 | goto next_desc; | |
1da177e4 | 1018 | } |
6e47e069 AC |
1019 | union_header = (struct usb_cdc_union_desc *)buffer; |
1020 | break; | |
1021 | case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ | |
1022 | cfd = (struct usb_cdc_country_functional_desc *)buffer; | |
1023 | break; | |
1024 | case USB_CDC_HEADER_TYPE: /* maybe check version */ | |
1025 | break; /* for now we ignore it */ | |
1026 | case USB_CDC_ACM_TYPE: | |
1027 | ac_management_function = buffer[3]; | |
1028 | break; | |
1029 | case USB_CDC_CALL_MANAGEMENT_TYPE: | |
1030 | call_management_function = buffer[3]; | |
1031 | call_interface_num = buffer[4]; | |
ce126644 | 1032 | if ( (quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3) |
6e47e069 AC |
1033 | dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n"); |
1034 | break; | |
1035 | default: | |
1036 | /* there are LOTS more CDC descriptors that | |
1037 | * could legitimately be found here. | |
1038 | */ | |
1039 | dev_dbg(&intf->dev, "Ignoring descriptor: " | |
1040 | "type %02x, length %d\n", | |
1041 | buffer[2], buffer[0]); | |
1042 | break; | |
1043 | } | |
1da177e4 LT |
1044 | next_desc: |
1045 | buflen -= buffer[0]; | |
1046 | buffer += buffer[0]; | |
1047 | } | |
1048 | ||
1049 | if (!union_header) { | |
1050 | if (call_interface_num > 0) { | |
6e47e069 | 1051 | dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); |
1da177e4 LT |
1052 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); |
1053 | control_interface = intf; | |
1054 | } else { | |
a2bfb4a3 ON |
1055 | if (intf->cur_altsetting->desc.bNumEndpoints != 3) { |
1056 | dev_dbg(&intf->dev,"No union descriptor, giving up\n"); | |
1057 | return -ENODEV; | |
1058 | } else { | |
1059 | dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); | |
1060 | combined_interfaces = 1; | |
1061 | control_interface = data_interface = intf; | |
1062 | goto look_for_collapsed_interface; | |
1063 | } | |
1da177e4 LT |
1064 | } |
1065 | } else { | |
1066 | control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); | |
1067 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); | |
1068 | if (!control_interface || !data_interface) { | |
6e47e069 | 1069 | dev_dbg(&intf->dev, "no interfaces\n"); |
1da177e4 LT |
1070 | return -ENODEV; |
1071 | } | |
1072 | } | |
6e47e069 | 1073 | |
1da177e4 | 1074 | if (data_interface_num != call_interface_num) |
6e47e069 | 1075 | dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); |
1da177e4 | 1076 | |
a2bfb4a3 ON |
1077 | if (control_interface == data_interface) { |
1078 | /* some broken devices designed for windows work this way */ | |
1079 | dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); | |
1080 | combined_interfaces = 1; | |
1081 | /* a popular other OS doesn't use it */ | |
1082 | quirks |= NO_CAP_LINE; | |
1083 | if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { | |
1084 | dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); | |
1085 | return -EINVAL; | |
1086 | } | |
1087 | look_for_collapsed_interface: | |
1088 | for (i = 0; i < 3; i++) { | |
1089 | struct usb_endpoint_descriptor *ep; | |
1090 | ep = &data_interface->cur_altsetting->endpoint[i].desc; | |
1091 | ||
1092 | if (usb_endpoint_is_int_in(ep)) | |
1093 | epctrl = ep; | |
1094 | else if (usb_endpoint_is_bulk_out(ep)) | |
1095 | epwrite = ep; | |
1096 | else if (usb_endpoint_is_bulk_in(ep)) | |
1097 | epread = ep; | |
1098 | else | |
1099 | return -EINVAL; | |
1100 | } | |
1101 | if (!epctrl || !epread || !epwrite) | |
1102 | return -ENODEV; | |
1103 | else | |
1104 | goto made_compressed_probe; | |
1105 | } | |
1106 | ||
1da177e4 LT |
1107 | skip_normal_probe: |
1108 | ||
1109 | /*workaround for switched interfaces */ | |
6e47e069 AC |
1110 | if (data_interface->cur_altsetting->desc.bInterfaceClass |
1111 | != CDC_DATA_INTERFACE_TYPE) { | |
1112 | if (control_interface->cur_altsetting->desc.bInterfaceClass | |
1113 | == CDC_DATA_INTERFACE_TYPE) { | |
1da177e4 | 1114 | struct usb_interface *t; |
6e47e069 AC |
1115 | dev_dbg(&intf->dev, |
1116 | "Your device has switched interfaces.\n"); | |
1da177e4 LT |
1117 | t = control_interface; |
1118 | control_interface = data_interface; | |
1119 | data_interface = t; | |
1120 | } else { | |
1121 | return -EINVAL; | |
1122 | } | |
1123 | } | |
74da5d68 AS |
1124 | |
1125 | /* Accept probe requests only for the control interface */ | |
a2bfb4a3 | 1126 | if (!combined_interfaces && intf != control_interface) |
74da5d68 | 1127 | return -ENODEV; |
6e47e069 | 1128 | |
a2bfb4a3 ON |
1129 | if (!combined_interfaces && usb_interface_claimed(data_interface)) { |
1130 | /* valid in this context */ | |
6e47e069 | 1131 | dev_dbg(&intf->dev, "The data interface isn't available\n"); |
1da177e4 LT |
1132 | return -EBUSY; |
1133 | } | |
1134 | ||
1135 | ||
1136 | if (data_interface->cur_altsetting->desc.bNumEndpoints < 2) | |
1137 | return -EINVAL; | |
1138 | ||
1139 | epctrl = &control_interface->cur_altsetting->endpoint[0].desc; | |
1140 | epread = &data_interface->cur_altsetting->endpoint[0].desc; | |
1141 | epwrite = &data_interface->cur_altsetting->endpoint[1].desc; | |
1142 | ||
1143 | ||
1144 | /* workaround for switched endpoints */ | |
45aea704 | 1145 | if (!usb_endpoint_dir_in(epread)) { |
1da177e4 LT |
1146 | /* descriptors are swapped */ |
1147 | struct usb_endpoint_descriptor *t; | |
6e47e069 AC |
1148 | dev_dbg(&intf->dev, |
1149 | "The data interface has switched endpoints\n"); | |
1da177e4 LT |
1150 | t = epread; |
1151 | epread = epwrite; | |
1152 | epwrite = t; | |
1153 | } | |
a2bfb4a3 | 1154 | made_compressed_probe: |
a5cc7ef9 | 1155 | dev_dbg(&intf->dev, "interfaces are valid\n"); |
1da177e4 LT |
1156 | for (minor = 0; minor < ACM_TTY_MINORS && acm_table[minor]; minor++); |
1157 | ||
1158 | if (minor == ACM_TTY_MINORS) { | |
9908a32e | 1159 | dev_err(&intf->dev, "no more free acm devices\n"); |
1da177e4 LT |
1160 | return -ENODEV; |
1161 | } | |
1162 | ||
6e47e069 AC |
1163 | acm = kzalloc(sizeof(struct acm), GFP_KERNEL); |
1164 | if (acm == NULL) { | |
255ab56c | 1165 | dev_err(&intf->dev, "out of memory (acm kzalloc)\n"); |
1da177e4 LT |
1166 | goto alloc_fail; |
1167 | } | |
1da177e4 LT |
1168 | |
1169 | ctrlsize = le16_to_cpu(epctrl->wMaxPacketSize); | |
6e47e069 AC |
1170 | readsize = le16_to_cpu(epread->wMaxPacketSize) * |
1171 | (quirks == SINGLE_RX_URB ? 1 : 2); | |
a2bfb4a3 | 1172 | acm->combined_interfaces = combined_interfaces; |
e4cf3aa8 | 1173 | acm->writesize = le16_to_cpu(epwrite->wMaxPacketSize) * 20; |
1da177e4 LT |
1174 | acm->control = control_interface; |
1175 | acm->data = data_interface; | |
1176 | acm->minor = minor; | |
1177 | acm->dev = usb_dev; | |
1178 | acm->ctrl_caps = ac_management_function; | |
a2bfb4a3 ON |
1179 | if (quirks & NO_CAP_LINE) |
1180 | acm->ctrl_caps &= ~USB_CDC_CAP_LINE; | |
1da177e4 LT |
1181 | acm->ctrlsize = ctrlsize; |
1182 | acm->readsize = readsize; | |
86478944 | 1183 | acm->rx_buflimit = num_rx_buf; |
61a87adf DK |
1184 | acm->urb_task.func = acm_rx_tasklet; |
1185 | acm->urb_task.data = (unsigned long) acm; | |
c4028958 | 1186 | INIT_WORK(&acm->work, acm_softint); |
e5fbab51 | 1187 | init_waitqueue_head(&acm->drain_wait); |
1da177e4 | 1188 | spin_lock_init(&acm->throttle_lock); |
884b600f | 1189 | spin_lock_init(&acm->write_lock); |
61a87adf | 1190 | spin_lock_init(&acm->read_lock); |
1365baf7 | 1191 | mutex_init(&acm->mutex); |
61a87adf | 1192 | acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); |
cf7fdd57 ON |
1193 | acm->is_int_ep = usb_endpoint_xfer_int(epread); |
1194 | if (acm->is_int_ep) | |
1195 | acm->bInterval = epread->bInterval; | |
739e0285 AC |
1196 | tty_port_init(&acm->port); |
1197 | acm->port.ops = &acm_port_ops; | |
1da177e4 | 1198 | |
997ea58e | 1199 | buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); |
1da177e4 | 1200 | if (!buf) { |
255ab56c | 1201 | dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n"); |
1da177e4 LT |
1202 | goto alloc_fail2; |
1203 | } | |
1204 | acm->ctrl_buffer = buf; | |
1205 | ||
884b600f | 1206 | if (acm_write_buffers_alloc(acm) < 0) { |
255ab56c | 1207 | dev_err(&intf->dev, "out of memory (write buffer alloc)\n"); |
1da177e4 LT |
1208 | goto alloc_fail4; |
1209 | } | |
1da177e4 LT |
1210 | |
1211 | acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); | |
1212 | if (!acm->ctrlurb) { | |
255ab56c | 1213 | dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n"); |
1da177e4 LT |
1214 | goto alloc_fail5; |
1215 | } | |
86478944 | 1216 | for (i = 0; i < num_rx_buf; i++) { |
61a87adf DK |
1217 | struct acm_ru *rcv = &(acm->ru[i]); |
1218 | ||
6e47e069 AC |
1219 | rcv->urb = usb_alloc_urb(0, GFP_KERNEL); |
1220 | if (rcv->urb == NULL) { | |
255ab56c | 1221 | dev_err(&intf->dev, |
6e47e069 | 1222 | "out of memory (read urbs usb_alloc_urb)\n"); |
c2572b78 | 1223 | goto alloc_fail6; |
61a87adf DK |
1224 | } |
1225 | ||
1226 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1227 | rcv->instance = acm; | |
1228 | } | |
86478944 | 1229 | for (i = 0; i < num_rx_buf; i++) { |
672c4e18 | 1230 | struct acm_rb *rb = &(acm->rb[i]); |
61a87adf | 1231 | |
997ea58e | 1232 | rb->base = usb_alloc_coherent(acm->dev, readsize, |
672c4e18 DB |
1233 | GFP_KERNEL, &rb->dma); |
1234 | if (!rb->base) { | |
255ab56c | 1235 | dev_err(&intf->dev, |
997ea58e | 1236 | "out of memory (read bufs usb_alloc_coherent)\n"); |
61a87adf DK |
1237 | goto alloc_fail7; |
1238 | } | |
1da177e4 | 1239 | } |
6e47e069 | 1240 | for (i = 0; i < ACM_NW; i++) { |
e4cf3aa8 DE |
1241 | struct acm_wb *snd = &(acm->wb[i]); |
1242 | ||
6e47e069 AC |
1243 | snd->urb = usb_alloc_urb(0, GFP_KERNEL); |
1244 | if (snd->urb == NULL) { | |
255ab56c | 1245 | dev_err(&intf->dev, |
59d7fec7 | 1246 | "out of memory (write urbs usb_alloc_urb)\n"); |
c2572b78 | 1247 | goto alloc_fail8; |
e4cf3aa8 DE |
1248 | } |
1249 | ||
5186ffee AL |
1250 | if (usb_endpoint_xfer_int(epwrite)) |
1251 | usb_fill_int_urb(snd->urb, usb_dev, | |
1252 | usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), | |
1253 | NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); | |
1254 | else | |
1255 | usb_fill_bulk_urb(snd->urb, usb_dev, | |
1256 | usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), | |
1257 | NULL, acm->writesize, acm_write_bulk, snd); | |
e4cf3aa8 DE |
1258 | snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
1259 | snd->instance = acm; | |
1da177e4 LT |
1260 | } |
1261 | ||
6e47e069 | 1262 | usb_set_intfdata(intf, acm); |
c4cabd28 ON |
1263 | |
1264 | i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); | |
1265 | if (i < 0) | |
1266 | goto alloc_fail8; | |
1267 | ||
1268 | if (cfd) { /* export the country data */ | |
1269 | acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); | |
1270 | if (!acm->country_codes) | |
1271 | goto skip_countries; | |
1272 | acm->country_code_size = cfd->bLength - 4; | |
6e47e069 AC |
1273 | memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, |
1274 | cfd->bLength - 4); | |
c4cabd28 ON |
1275 | acm->country_rel_date = cfd->iCountryCodeRelDate; |
1276 | ||
1277 | i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); | |
1278 | if (i < 0) { | |
1279 | kfree(acm->country_codes); | |
1280 | goto skip_countries; | |
1281 | } | |
1282 | ||
6e47e069 AC |
1283 | i = device_create_file(&intf->dev, |
1284 | &dev_attr_iCountryCodeRelDate); | |
c4cabd28 | 1285 | if (i < 0) { |
c2572b78 | 1286 | device_remove_file(&intf->dev, &dev_attr_wCountryCodes); |
c4cabd28 ON |
1287 | kfree(acm->country_codes); |
1288 | goto skip_countries; | |
1289 | } | |
1290 | } | |
1291 | ||
1292 | skip_countries: | |
6e47e069 | 1293 | usb_fill_int_urb(acm->ctrlurb, usb_dev, |
a2bfb4a3 ON |
1294 | usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), |
1295 | acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, | |
1296 | /* works around buggy devices */ | |
1297 | epctrl->bInterval ? epctrl->bInterval : 0xff); | |
1da177e4 LT |
1298 | acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
1299 | acm->ctrlurb->transfer_dma = acm->ctrl_dma; | |
1300 | ||
1da177e4 LT |
1301 | dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); |
1302 | ||
1303 | acm_set_control(acm, acm->ctrlout); | |
1304 | ||
1305 | acm->line.dwDTERate = cpu_to_le32(9600); | |
1306 | acm->line.bDataBits = 8; | |
1307 | acm_set_line(acm, &acm->line); | |
1308 | ||
1309 | usb_driver_claim_interface(&acm_driver, data_interface, acm); | |
672c4e18 | 1310 | usb_set_intfdata(data_interface, acm); |
1da177e4 | 1311 | |
83ef344a | 1312 | usb_get_intf(control_interface); |
1313 | tty_register_device(acm_tty_driver, minor, &control_interface->dev); | |
1da177e4 LT |
1314 | |
1315 | acm_table[minor] = acm; | |
1da177e4 | 1316 | |
c4cabd28 ON |
1317 | return 0; |
1318 | alloc_fail8: | |
e4cf3aa8 DE |
1319 | for (i = 0; i < ACM_NW; i++) |
1320 | usb_free_urb(acm->wb[i].urb); | |
1da177e4 | 1321 | alloc_fail7: |
830f4021 | 1322 | acm_read_buffers_free(acm); |
c2572b78 | 1323 | alloc_fail6: |
86478944 | 1324 | for (i = 0; i < num_rx_buf; i++) |
61a87adf | 1325 | usb_free_urb(acm->ru[i].urb); |
1da177e4 LT |
1326 | usb_free_urb(acm->ctrlurb); |
1327 | alloc_fail5: | |
884b600f | 1328 | acm_write_buffers_free(acm); |
1da177e4 | 1329 | alloc_fail4: |
997ea58e | 1330 | usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); |
1da177e4 LT |
1331 | alloc_fail2: |
1332 | kfree(acm); | |
1333 | alloc_fail: | |
1334 | return -ENOMEM; | |
1335 | } | |
1336 | ||
1365baf7 ON |
1337 | static void stop_data_traffic(struct acm *acm) |
1338 | { | |
1339 | int i; | |
a5cc7ef9 JH |
1340 | |
1341 | dev_dbg(&acm->control->dev, "%s\n", __func__); | |
1365baf7 ON |
1342 | |
1343 | tasklet_disable(&acm->urb_task); | |
1344 | ||
1345 | usb_kill_urb(acm->ctrlurb); | |
6e47e069 | 1346 | for (i = 0; i < ACM_NW; i++) |
e4cf3aa8 | 1347 | usb_kill_urb(acm->wb[i].urb); |
1365baf7 ON |
1348 | for (i = 0; i < acm->rx_buflimit; i++) |
1349 | usb_kill_urb(acm->ru[i].urb); | |
1350 | ||
1365baf7 ON |
1351 | tasklet_enable(&acm->urb_task); |
1352 | ||
1353 | cancel_work_sync(&acm->work); | |
1354 | } | |
1355 | ||
1da177e4 LT |
1356 | static void acm_disconnect(struct usb_interface *intf) |
1357 | { | |
c4cabd28 | 1358 | struct acm *acm = usb_get_intfdata(intf); |
1da177e4 | 1359 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
10077d4a | 1360 | struct tty_struct *tty; |
1da177e4 | 1361 | |
672c4e18 DB |
1362 | /* sibling interface is already cleaning up */ |
1363 | if (!acm) | |
86067eea | 1364 | return; |
672c4e18 DB |
1365 | |
1366 | mutex_lock(&open_mutex); | |
6e47e069 | 1367 | if (acm->country_codes) { |
74da5d68 AS |
1368 | device_remove_file(&acm->control->dev, |
1369 | &dev_attr_wCountryCodes); | |
1370 | device_remove_file(&acm->control->dev, | |
1371 | &dev_attr_iCountryCodeRelDate); | |
c4cabd28 | 1372 | } |
74da5d68 | 1373 | device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); |
1da177e4 | 1374 | acm->dev = NULL; |
86067eea ON |
1375 | usb_set_intfdata(acm->control, NULL); |
1376 | usb_set_intfdata(acm->data, NULL); | |
1da177e4 | 1377 | |
1365baf7 | 1378 | stop_data_traffic(acm); |
1da177e4 | 1379 | |
884b600f | 1380 | acm_write_buffers_free(acm); |
997ea58e DM |
1381 | usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, |
1382 | acm->ctrl_dma); | |
830f4021 | 1383 | acm_read_buffers_free(acm); |
1da177e4 | 1384 | |
a2bfb4a3 ON |
1385 | if (!acm->combined_interfaces) |
1386 | usb_driver_release_interface(&acm_driver, intf == acm->control ? | |
830f4021 | 1387 | acm->data : acm->control); |
1da177e4 | 1388 | |
10077d4a | 1389 | if (acm->port.count == 0) { |
83ef344a | 1390 | acm_tty_unregister(acm); |
4186ecf8 | 1391 | mutex_unlock(&open_mutex); |
1da177e4 LT |
1392 | return; |
1393 | } | |
1394 | ||
4186ecf8 | 1395 | mutex_unlock(&open_mutex); |
10077d4a AC |
1396 | tty = tty_port_tty_get(&acm->port); |
1397 | if (tty) { | |
1398 | tty_hangup(tty); | |
1399 | tty_kref_put(tty); | |
1400 | } | |
1da177e4 LT |
1401 | } |
1402 | ||
35758589 | 1403 | #ifdef CONFIG_PM |
1365baf7 ON |
1404 | static int acm_suspend(struct usb_interface *intf, pm_message_t message) |
1405 | { | |
1406 | struct acm *acm = usb_get_intfdata(intf); | |
11ea859d ON |
1407 | int cnt; |
1408 | ||
65bfd296 | 1409 | if (message.event & PM_EVENT_AUTO) { |
11ea859d ON |
1410 | int b; |
1411 | ||
1412 | spin_lock_irq(&acm->read_lock); | |
1413 | spin_lock(&acm->write_lock); | |
1414 | b = acm->processing + acm->transmitting; | |
1415 | spin_unlock(&acm->write_lock); | |
1416 | spin_unlock_irq(&acm->read_lock); | |
1417 | if (b) | |
1418 | return -EBUSY; | |
1419 | } | |
1420 | ||
1421 | spin_lock_irq(&acm->read_lock); | |
1422 | spin_lock(&acm->write_lock); | |
1423 | cnt = acm->susp_count++; | |
1424 | spin_unlock(&acm->write_lock); | |
1425 | spin_unlock_irq(&acm->read_lock); | |
1365baf7 | 1426 | |
11ea859d | 1427 | if (cnt) |
1365baf7 ON |
1428 | return 0; |
1429 | /* | |
1430 | we treat opened interfaces differently, | |
1431 | we must guard against open | |
1432 | */ | |
1433 | mutex_lock(&acm->mutex); | |
1434 | ||
10077d4a | 1435 | if (acm->port.count) |
1365baf7 ON |
1436 | stop_data_traffic(acm); |
1437 | ||
1438 | mutex_unlock(&acm->mutex); | |
1439 | return 0; | |
1440 | } | |
1441 | ||
1442 | static int acm_resume(struct usb_interface *intf) | |
1443 | { | |
1444 | struct acm *acm = usb_get_intfdata(intf); | |
97d35f95 | 1445 | struct acm_wb *wb; |
1365baf7 | 1446 | int rv = 0; |
11ea859d | 1447 | int cnt; |
1365baf7 | 1448 | |
11ea859d ON |
1449 | spin_lock_irq(&acm->read_lock); |
1450 | acm->susp_count -= 1; | |
1451 | cnt = acm->susp_count; | |
1452 | spin_unlock_irq(&acm->read_lock); | |
1453 | ||
1454 | if (cnt) | |
1365baf7 ON |
1455 | return 0; |
1456 | ||
1457 | mutex_lock(&acm->mutex); | |
10077d4a | 1458 | if (acm->port.count) { |
1365baf7 | 1459 | rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO); |
97d35f95 ON |
1460 | |
1461 | spin_lock_irq(&acm->write_lock); | |
1462 | if (acm->delayed_wb) { | |
1463 | wb = acm->delayed_wb; | |
1464 | acm->delayed_wb = NULL; | |
1465 | spin_unlock_irq(&acm->write_lock); | |
f0730924 | 1466 | acm_start_wb(acm, wb); |
97d35f95 ON |
1467 | } else { |
1468 | spin_unlock_irq(&acm->write_lock); | |
1469 | } | |
1470 | ||
1471 | /* | |
1472 | * delayed error checking because we must | |
1473 | * do the write path at all cost | |
1474 | */ | |
1365baf7 | 1475 | if (rv < 0) |
11ea859d | 1476 | goto err_out; |
1365baf7 ON |
1477 | |
1478 | tasklet_schedule(&acm->urb_task); | |
1479 | } | |
1480 | ||
1481 | err_out: | |
1482 | mutex_unlock(&acm->mutex); | |
1483 | return rv; | |
1484 | } | |
35758589 | 1485 | |
a91b0c50 FL |
1486 | static int acm_reset_resume(struct usb_interface *intf) |
1487 | { | |
1488 | struct acm *acm = usb_get_intfdata(intf); | |
1489 | struct tty_struct *tty; | |
1490 | ||
1491 | mutex_lock(&acm->mutex); | |
1492 | if (acm->port.count) { | |
1493 | tty = tty_port_tty_get(&acm->port); | |
1494 | if (tty) { | |
1495 | tty_hangup(tty); | |
1496 | tty_kref_put(tty); | |
1497 | } | |
1498 | } | |
1499 | mutex_unlock(&acm->mutex); | |
1500 | return acm_resume(intf); | |
1501 | } | |
1502 | ||
35758589 | 1503 | #endif /* CONFIG_PM */ |
c1479a92 AT |
1504 | |
1505 | #define NOKIA_PCSUITE_ACM_INFO(x) \ | |
1506 | USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ | |
1507 | USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ | |
1508 | USB_CDC_ACM_PROTO_VENDOR) | |
1509 | ||
4035e456 TG |
1510 | #define SAMSUNG_PCSUITE_ACM_INFO(x) \ |
1511 | USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ | |
1512 | USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ | |
1513 | USB_CDC_ACM_PROTO_VENDOR) | |
1514 | ||
1da177e4 LT |
1515 | /* |
1516 | * USB driver structure. | |
1517 | */ | |
1518 | ||
6ef4852b | 1519 | static const struct usb_device_id acm_ids[] = { |
1da177e4 LT |
1520 | /* quirky and broken devices */ |
1521 | { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ | |
1522 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1523 | }, | |
b0e2a705 AA |
1524 | { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ |
1525 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1526 | }, | |
0f9c7b4a AL |
1527 | { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ |
1528 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1529 | }, | |
8753e65e MO |
1530 | { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ |
1531 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1532 | }, | |
91a9c921 CM |
1533 | { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ |
1534 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1535 | }, | |
7abcf20b AC |
1536 | { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ |
1537 | .driver_info = SINGLE_RX_URB, | |
1538 | }, | |
86478944 ON |
1539 | { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ |
1540 | .driver_info = SINGLE_RX_URB, /* firmware bug */ | |
1541 | }, | |
3dd2ae81 ON |
1542 | { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ |
1543 | .driver_info = SINGLE_RX_URB, /* firmware bug */ | |
1544 | }, | |
9be8456c ON |
1545 | { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ |
1546 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1547 | }, | |
6149ed5e IM |
1548 | { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ |
1549 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1550 | }, | |
c8fd2c37 ES |
1551 | { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ |
1552 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1553 | }, | |
c89c60e9 AC |
1554 | { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ |
1555 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1556 | }, | |
cab98a0a XK |
1557 | { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ |
1558 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1559 | }, | |
155df65a DT |
1560 | { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ |
1561 | }, | |
c332b4e1 AR |
1562 | { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ |
1563 | .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on | |
1564 | data interface instead of | |
1565 | communications interface. | |
1566 | Maybe we should define a new | |
1567 | quirk for this. */ | |
1568 | }, | |
1f17c502 KK |
1569 | { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ |
1570 | .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ | |
1571 | }, | |
c3baa19b RN |
1572 | { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ |
1573 | .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ | |
1574 | }, | |
9be8456c | 1575 | |
c1479a92 AT |
1576 | /* Nokia S60 phones expose two ACM channels. The first is |
1577 | * a modem and is picked up by the standard AT-command | |
1578 | * information below. The second is 'vendor-specific' but | |
1579 | * is treated as a serial device at the S60 end, so we want | |
1580 | * to expose it on Linux too. */ | |
1581 | { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ | |
1582 | { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ | |
1583 | { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ | |
1584 | { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ | |
1585 | { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ | |
1586 | { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ | |
1587 | { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ | |
1588 | { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ | |
1589 | { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ | |
1590 | { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ | |
1591 | { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ | |
1592 | { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ | |
1593 | { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ | |
1594 | { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ | |
1595 | { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ | |
1596 | { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ | |
1597 | { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ | |
1598 | { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ | |
1599 | { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ | |
1600 | { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ | |
1601 | { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ | |
1602 | { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ | |
1603 | { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ | |
1604 | { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ | |
1605 | { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ | |
1606 | { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ | |
1607 | { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ | |
1608 | { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ | |
1609 | { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ | |
1610 | { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ | |
1611 | { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ | |
1612 | { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ | |
1613 | { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ | |
1614 | { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ | |
1615 | { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ | |
1616 | { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ | |
1617 | { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ | |
1618 | { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ | |
1619 | { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ | |
1620 | { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ | |
1621 | { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ | |
1622 | { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ | |
1623 | { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ | |
83a4eae9 | 1624 | { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ |
4035e456 TG |
1625 | { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ |
1626 | { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ | |
1627 | { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ | |
1628 | { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ | |
1629 | { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ | |
1630 | { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ | |
1631 | { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ | |
1632 | { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ | |
1633 | { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ | |
1634 | { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ | |
721d92fc | 1635 | { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ |
4035e456 | 1636 | { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ |
c1479a92 AT |
1637 | |
1638 | /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ | |
1639 | ||
7c5d8c39 | 1640 | /* Support Lego NXT using pbLua firmware */ |
ce126644 JC |
1641 | { USB_DEVICE(0x0694, 0xff00), |
1642 | .driver_info = NOT_A_MODEM, | |
7893afc0 | 1643 | }, |
7c5d8c39 | 1644 | |
5b239f0a PC |
1645 | /* control interfaces without any protocol set */ |
1646 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1647 | USB_CDC_PROTO_NONE) }, | |
1648 | ||
1da177e4 LT |
1649 | /* control interfaces with various AT-command sets */ |
1650 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1651 | USB_CDC_ACM_PROTO_AT_V25TER) }, | |
1652 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1653 | USB_CDC_ACM_PROTO_AT_PCCA101) }, | |
1654 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1655 | USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, | |
1656 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1657 | USB_CDC_ACM_PROTO_AT_GSM) }, | |
1658 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
6e47e069 | 1659 | USB_CDC_ACM_PROTO_AT_3G) }, |
1da177e4 LT |
1660 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
1661 | USB_CDC_ACM_PROTO_AT_CDMA) }, | |
1662 | ||
1da177e4 LT |
1663 | { } |
1664 | }; | |
1665 | ||
6e47e069 | 1666 | MODULE_DEVICE_TABLE(usb, acm_ids); |
1da177e4 LT |
1667 | |
1668 | static struct usb_driver acm_driver = { | |
1da177e4 LT |
1669 | .name = "cdc_acm", |
1670 | .probe = acm_probe, | |
1671 | .disconnect = acm_disconnect, | |
35758589 | 1672 | #ifdef CONFIG_PM |
1365baf7 ON |
1673 | .suspend = acm_suspend, |
1674 | .resume = acm_resume, | |
a91b0c50 | 1675 | .reset_resume = acm_reset_resume, |
35758589 | 1676 | #endif |
1da177e4 | 1677 | .id_table = acm_ids, |
35758589 | 1678 | #ifdef CONFIG_PM |
1365baf7 | 1679 | .supports_autosuspend = 1, |
35758589 | 1680 | #endif |
1da177e4 LT |
1681 | }; |
1682 | ||
1683 | /* | |
1684 | * TTY driver structures. | |
1685 | */ | |
1686 | ||
b68e31d0 | 1687 | static const struct tty_operations acm_ops = { |
1da177e4 LT |
1688 | .open = acm_tty_open, |
1689 | .close = acm_tty_close, | |
10077d4a | 1690 | .hangup = acm_tty_hangup, |
1da177e4 LT |
1691 | .write = acm_tty_write, |
1692 | .write_room = acm_tty_write_room, | |
1693 | .ioctl = acm_tty_ioctl, | |
1694 | .throttle = acm_tty_throttle, | |
1695 | .unthrottle = acm_tty_unthrottle, | |
1696 | .chars_in_buffer = acm_tty_chars_in_buffer, | |
1697 | .break_ctl = acm_tty_break_ctl, | |
1698 | .set_termios = acm_tty_set_termios, | |
1699 | .tiocmget = acm_tty_tiocmget, | |
1700 | .tiocmset = acm_tty_tiocmset, | |
1701 | }; | |
1702 | ||
1703 | /* | |
1704 | * Init / exit. | |
1705 | */ | |
1706 | ||
1707 | static int __init acm_init(void) | |
1708 | { | |
1709 | int retval; | |
1710 | acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); | |
1711 | if (!acm_tty_driver) | |
1712 | return -ENOMEM; | |
1713 | acm_tty_driver->owner = THIS_MODULE, | |
1714 | acm_tty_driver->driver_name = "acm", | |
1715 | acm_tty_driver->name = "ttyACM", | |
1da177e4 LT |
1716 | acm_tty_driver->major = ACM_TTY_MAJOR, |
1717 | acm_tty_driver->minor_start = 0, | |
1718 | acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, | |
1719 | acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, | |
331b8319 | 1720 | acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
1da177e4 | 1721 | acm_tty_driver->init_termios = tty_std_termios; |
6e47e069 AC |
1722 | acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | |
1723 | HUPCL | CLOCAL; | |
1da177e4 LT |
1724 | tty_set_operations(acm_tty_driver, &acm_ops); |
1725 | ||
1726 | retval = tty_register_driver(acm_tty_driver); | |
1727 | if (retval) { | |
1728 | put_tty_driver(acm_tty_driver); | |
1729 | return retval; | |
1730 | } | |
1731 | ||
1732 | retval = usb_register(&acm_driver); | |
1733 | if (retval) { | |
1734 | tty_unregister_driver(acm_tty_driver); | |
1735 | put_tty_driver(acm_tty_driver); | |
1736 | return retval; | |
1737 | } | |
1738 | ||
5909f6ea GKH |
1739 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
1740 | DRIVER_DESC "\n"); | |
1da177e4 LT |
1741 | |
1742 | return 0; | |
1743 | } | |
1744 | ||
1745 | static void __exit acm_exit(void) | |
1746 | { | |
1747 | usb_deregister(&acm_driver); | |
1748 | tty_unregister_driver(acm_tty_driver); | |
1749 | put_tty_driver(acm_tty_driver); | |
1750 | } | |
1751 | ||
1752 | module_init(acm_init); | |
1753 | module_exit(acm_exit); | |
1754 | ||
6e47e069 AC |
1755 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1756 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 | 1757 | MODULE_LICENSE("GPL"); |
e766aeb8 | 1758 | MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); |