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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> |
088c64f8 | 10 | * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com> |
1da177e4 LT |
11 | * |
12 | * USB Abstract Control Model driver for USB modems and ISDN adapters | |
13 | * | |
14 | * Sponsored by SuSE | |
15 | * | |
1da177e4 LT |
16 | * This program is free software; you can redistribute it and/or modify |
17 | * it under the terms of the GNU General Public License as published by | |
18 | * the Free Software Foundation; either version 2 of the License, or | |
19 | * (at your option) any later version. | |
20 | * | |
21 | * This program is distributed in the hope that it will be useful, | |
22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | * GNU General Public License for more details. | |
25 | * | |
26 | * You should have received a copy of the GNU General Public License | |
27 | * along with this program; if not, write to the Free Software | |
28 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
29 | */ | |
30 | ||
31 | #undef DEBUG | |
e5fbab51 | 32 | #undef VERBOSE_DEBUG |
1da177e4 LT |
33 | |
34 | #include <linux/kernel.h> | |
35 | #include <linux/errno.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/slab.h> | |
38 | #include <linux/tty.h> | |
7af25b4b | 39 | #include <linux/serial.h> |
1da177e4 LT |
40 | #include <linux/tty_driver.h> |
41 | #include <linux/tty_flip.h> | |
42 | #include <linux/module.h> | |
4186ecf8 | 43 | #include <linux/mutex.h> |
10077d4a | 44 | #include <linux/uaccess.h> |
1da177e4 | 45 | #include <linux/usb.h> |
a8c28f23 | 46 | #include <linux/usb/cdc.h> |
1da177e4 LT |
47 | #include <asm/byteorder.h> |
48 | #include <asm/unaligned.h> | |
61a87adf | 49 | #include <linux/list.h> |
1da177e4 LT |
50 | |
51 | #include "cdc-acm.h" | |
52 | ||
e5fbab51 | 53 | |
088c64f8 | 54 | #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" |
1da177e4 LT |
55 | #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" |
56 | ||
57 | static struct usb_driver acm_driver; | |
58 | static struct tty_driver *acm_tty_driver; | |
59 | static struct acm *acm_table[ACM_TTY_MINORS]; | |
60 | ||
7fb57a01 | 61 | static DEFINE_MUTEX(acm_table_lock); |
1da177e4 | 62 | |
7fb57a01 HS |
63 | /* |
64 | * acm_table accessors | |
65 | */ | |
1da177e4 | 66 | |
7fb57a01 HS |
67 | /* |
68 | * Look up an ACM structure by index. If found and not disconnected, increment | |
69 | * its refcount and return it with its mutex held. | |
70 | */ | |
71 | static struct acm *acm_get_by_index(unsigned index) | |
72 | { | |
73 | struct acm *acm; | |
74 | ||
75 | mutex_lock(&acm_table_lock); | |
76 | acm = acm_table[index]; | |
77 | if (acm) { | |
78 | mutex_lock(&acm->mutex); | |
79 | if (acm->disconnected) { | |
80 | mutex_unlock(&acm->mutex); | |
81 | acm = NULL; | |
82 | } else { | |
83 | tty_port_get(&acm->port); | |
84 | mutex_unlock(&acm->mutex); | |
85 | } | |
86 | } | |
87 | mutex_unlock(&acm_table_lock); | |
88 | return acm; | |
89 | } | |
90 | ||
91 | /* | |
92 | * Try to find an available minor number and if found, associate it with 'acm'. | |
93 | */ | |
94 | static int acm_alloc_minor(struct acm *acm) | |
95 | { | |
96 | int minor; | |
97 | ||
98 | mutex_lock(&acm_table_lock); | |
99 | for (minor = 0; minor < ACM_TTY_MINORS; minor++) { | |
100 | if (!acm_table[minor]) { | |
101 | acm_table[minor] = acm; | |
102 | break; | |
103 | } | |
104 | } | |
105 | mutex_unlock(&acm_table_lock); | |
106 | ||
107 | return minor; | |
108 | } | |
109 | ||
110 | /* Release the minor number associated with 'acm'. */ | |
111 | static void acm_release_minor(struct acm *acm) | |
112 | { | |
113 | mutex_lock(&acm_table_lock); | |
114 | acm_table[acm->minor] = NULL; | |
115 | mutex_unlock(&acm_table_lock); | |
116 | } | |
739e0285 | 117 | |
1da177e4 LT |
118 | /* |
119 | * Functions for ACM control messages. | |
120 | */ | |
121 | ||
6e47e069 AC |
122 | static int acm_ctrl_msg(struct acm *acm, int request, int value, |
123 | void *buf, int len) | |
1da177e4 LT |
124 | { |
125 | int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), | |
126 | request, USB_RT_ACM, value, | |
127 | acm->control->altsetting[0].desc.bInterfaceNumber, | |
128 | buf, len, 5000); | |
a5cc7ef9 JH |
129 | dev_dbg(&acm->control->dev, |
130 | "%s - rq 0x%02x, val %#x, len %#x, result %d\n", | |
131 | __func__, request, value, len, retval); | |
1da177e4 LT |
132 | return retval < 0 ? retval : 0; |
133 | } | |
134 | ||
135 | /* devices aren't required to support these requests. | |
136 | * the cdc acm descriptor tells whether they do... | |
137 | */ | |
138 | #define acm_set_control(acm, control) \ | |
139 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0) | |
140 | #define acm_set_line(acm, line) \ | |
141 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) | |
142 | #define acm_send_break(acm, ms) \ | |
143 | acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) | |
144 | ||
884b600f ON |
145 | /* |
146 | * Write buffer management. | |
147 | * All of these assume proper locks taken by the caller. | |
148 | */ | |
149 | ||
150 | static int acm_wb_alloc(struct acm *acm) | |
151 | { | |
152 | int i, wbn; | |
153 | struct acm_wb *wb; | |
154 | ||
e4cf3aa8 | 155 | wbn = 0; |
884b600f ON |
156 | i = 0; |
157 | for (;;) { | |
158 | wb = &acm->wb[wbn]; | |
159 | if (!wb->use) { | |
160 | wb->use = 1; | |
161 | return wbn; | |
162 | } | |
86478944 ON |
163 | wbn = (wbn + 1) % ACM_NW; |
164 | if (++i >= ACM_NW) | |
884b600f ON |
165 | return -1; |
166 | } | |
167 | } | |
168 | ||
884b600f ON |
169 | static int acm_wb_is_avail(struct acm *acm) |
170 | { | |
171 | int i, n; | |
e5fbab51 | 172 | unsigned long flags; |
884b600f | 173 | |
86478944 | 174 | n = ACM_NW; |
e5fbab51 | 175 | spin_lock_irqsave(&acm->write_lock, flags); |
6e47e069 | 176 | for (i = 0; i < ACM_NW; i++) |
86478944 | 177 | n -= acm->wb[i].use; |
e5fbab51 | 178 | spin_unlock_irqrestore(&acm->write_lock, flags); |
884b600f ON |
179 | return n; |
180 | } | |
181 | ||
884b600f | 182 | /* |
ad0b65ef | 183 | * Finish write. Caller must hold acm->write_lock |
884b600f | 184 | */ |
e4cf3aa8 | 185 | static void acm_write_done(struct acm *acm, struct acm_wb *wb) |
884b600f | 186 | { |
e4cf3aa8 | 187 | wb->use = 0; |
11ea859d | 188 | acm->transmitting--; |
97d35f95 | 189 | usb_autopm_put_interface_async(acm->control); |
884b600f ON |
190 | } |
191 | ||
192 | /* | |
193 | * Poke write. | |
11ea859d ON |
194 | * |
195 | * the caller is responsible for locking | |
884b600f | 196 | */ |
11ea859d ON |
197 | |
198 | static int acm_start_wb(struct acm *acm, struct acm_wb *wb) | |
199 | { | |
200 | int rc; | |
201 | ||
202 | acm->transmitting++; | |
203 | ||
204 | wb->urb->transfer_buffer = wb->buf; | |
205 | wb->urb->transfer_dma = wb->dmah; | |
206 | wb->urb->transfer_buffer_length = wb->len; | |
207 | wb->urb->dev = acm->dev; | |
208 | ||
6e47e069 AC |
209 | rc = usb_submit_urb(wb->urb, GFP_ATOMIC); |
210 | if (rc < 0) { | |
a5cc7ef9 JH |
211 | dev_err(&acm->data->dev, |
212 | "%s - usb_submit_urb(write bulk) failed: %d\n", | |
213 | __func__, rc); | |
11ea859d ON |
214 | acm_write_done(acm, wb); |
215 | } | |
216 | return rc; | |
217 | } | |
218 | ||
e4cf3aa8 | 219 | static int acm_write_start(struct acm *acm, int wbn) |
884b600f ON |
220 | { |
221 | unsigned long flags; | |
934da463 | 222 | struct acm_wb *wb = &acm->wb[wbn]; |
884b600f ON |
223 | int rc; |
224 | ||
225 | spin_lock_irqsave(&acm->write_lock, flags); | |
226 | if (!acm->dev) { | |
934da463 | 227 | wb->use = 0; |
884b600f ON |
228 | spin_unlock_irqrestore(&acm->write_lock, flags); |
229 | return -ENODEV; | |
230 | } | |
231 | ||
5e9e75f8 | 232 | dev_vdbg(&acm->data->dev, "%s - susp_count %d\n", __func__, |
a5cc7ef9 | 233 | acm->susp_count); |
97d35f95 | 234 | usb_autopm_get_interface_async(acm->control); |
11ea859d | 235 | if (acm->susp_count) { |
97d35f95 ON |
236 | if (!acm->delayed_wb) |
237 | acm->delayed_wb = wb; | |
238 | else | |
239 | usb_autopm_put_interface_async(acm->control); | |
11ea859d ON |
240 | spin_unlock_irqrestore(&acm->write_lock, flags); |
241 | return 0; /* A white lie */ | |
242 | } | |
243 | usb_mark_last_busy(acm->dev); | |
244 | ||
11ea859d | 245 | rc = acm_start_wb(acm, wb); |
884b600f ON |
246 | spin_unlock_irqrestore(&acm->write_lock, flags); |
247 | ||
884b600f | 248 | return rc; |
11ea859d | 249 | |
884b600f | 250 | } |
c4cabd28 ON |
251 | /* |
252 | * attributes exported through sysfs | |
253 | */ | |
254 | static ssize_t show_caps | |
255 | (struct device *dev, struct device_attribute *attr, char *buf) | |
256 | { | |
257 | struct usb_interface *intf = to_usb_interface(dev); | |
258 | struct acm *acm = usb_get_intfdata(intf); | |
259 | ||
260 | return sprintf(buf, "%d", acm->ctrl_caps); | |
261 | } | |
262 | static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL); | |
263 | ||
264 | static ssize_t show_country_codes | |
265 | (struct device *dev, struct device_attribute *attr, char *buf) | |
266 | { | |
267 | struct usb_interface *intf = to_usb_interface(dev); | |
268 | struct acm *acm = usb_get_intfdata(intf); | |
269 | ||
270 | memcpy(buf, acm->country_codes, acm->country_code_size); | |
271 | return acm->country_code_size; | |
272 | } | |
273 | ||
274 | static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL); | |
275 | ||
276 | static ssize_t show_country_rel_date | |
277 | (struct device *dev, struct device_attribute *attr, char *buf) | |
278 | { | |
279 | struct usb_interface *intf = to_usb_interface(dev); | |
280 | struct acm *acm = usb_get_intfdata(intf); | |
281 | ||
282 | return sprintf(buf, "%d", acm->country_rel_date); | |
283 | } | |
884b600f | 284 | |
c4cabd28 | 285 | static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL); |
1da177e4 LT |
286 | /* |
287 | * Interrupt handlers for various ACM device responses | |
288 | */ | |
289 | ||
290 | /* control interface reports status changes with "interrupt" transfers */ | |
7d12e780 | 291 | static void acm_ctrl_irq(struct urb *urb) |
1da177e4 LT |
292 | { |
293 | struct acm *acm = urb->context; | |
294 | struct usb_cdc_notification *dr = urb->transfer_buffer; | |
10077d4a | 295 | struct tty_struct *tty; |
1da177e4 LT |
296 | unsigned char *data; |
297 | int newctrl; | |
185d4058 GKH |
298 | int retval; |
299 | int status = urb->status; | |
1da177e4 | 300 | |
185d4058 | 301 | switch (status) { |
1da177e4 LT |
302 | case 0: |
303 | /* success */ | |
304 | break; | |
305 | case -ECONNRESET: | |
306 | case -ENOENT: | |
307 | case -ESHUTDOWN: | |
308 | /* this urb is terminated, clean up */ | |
a5cc7ef9 JH |
309 | dev_dbg(&acm->control->dev, |
310 | "%s - urb shutting down with status: %d\n", | |
311 | __func__, status); | |
1da177e4 LT |
312 | return; |
313 | default: | |
a5cc7ef9 JH |
314 | dev_dbg(&acm->control->dev, |
315 | "%s - nonzero urb status received: %d\n", | |
316 | __func__, status); | |
1da177e4 LT |
317 | goto exit; |
318 | } | |
319 | ||
7e7797e7 JH |
320 | usb_mark_last_busy(acm->dev); |
321 | ||
1da177e4 LT |
322 | data = (unsigned char *)(dr + 1); |
323 | switch (dr->bNotificationType) { | |
6e47e069 | 324 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: |
a5cc7ef9 JH |
325 | dev_dbg(&acm->control->dev, "%s - network connection: %d\n", |
326 | __func__, dr->wValue); | |
6e47e069 | 327 | break; |
1da177e4 | 328 | |
6e47e069 AC |
329 | case USB_CDC_NOTIFY_SERIAL_STATE: |
330 | tty = tty_port_tty_get(&acm->port); | |
331 | newctrl = get_unaligned_le16(data); | |
1da177e4 | 332 | |
6e47e069 AC |
333 | if (tty) { |
334 | if (!acm->clocal && | |
335 | (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { | |
a5cc7ef9 JH |
336 | dev_dbg(&acm->control->dev, |
337 | "%s - calling hangup\n", __func__); | |
6e47e069 | 338 | tty_hangup(tty); |
1da177e4 | 339 | } |
6e47e069 AC |
340 | tty_kref_put(tty); |
341 | } | |
1da177e4 | 342 | |
6e47e069 | 343 | acm->ctrlin = newctrl; |
1da177e4 | 344 | |
a5cc7ef9 JH |
345 | dev_dbg(&acm->control->dev, |
346 | "%s - input control lines: dcd%c dsr%c break%c " | |
347 | "ring%c framing%c parity%c overrun%c\n", | |
348 | __func__, | |
6e47e069 AC |
349 | acm->ctrlin & ACM_CTRL_DCD ? '+' : '-', |
350 | acm->ctrlin & ACM_CTRL_DSR ? '+' : '-', | |
351 | acm->ctrlin & ACM_CTRL_BRK ? '+' : '-', | |
352 | acm->ctrlin & ACM_CTRL_RI ? '+' : '-', | |
353 | acm->ctrlin & ACM_CTRL_FRAMING ? '+' : '-', | |
354 | acm->ctrlin & ACM_CTRL_PARITY ? '+' : '-', | |
355 | acm->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-'); | |
1da177e4 LT |
356 | break; |
357 | ||
6e47e069 | 358 | default: |
a5cc7ef9 JH |
359 | dev_dbg(&acm->control->dev, |
360 | "%s - unknown notification %d received: index %d " | |
361 | "len %d data0 %d data1 %d\n", | |
362 | __func__, | |
6e47e069 AC |
363 | dr->bNotificationType, dr->wIndex, |
364 | dr->wLength, data[0], data[1]); | |
365 | break; | |
1da177e4 LT |
366 | } |
367 | exit: | |
6e47e069 | 368 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
185d4058 | 369 | if (retval) |
1d9846e5 JH |
370 | dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n", |
371 | __func__, retval); | |
1da177e4 LT |
372 | } |
373 | ||
088c64f8 | 374 | static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) |
1da177e4 | 375 | { |
088c64f8 | 376 | int res; |
185d4058 | 377 | |
088c64f8 JH |
378 | if (!test_and_clear_bit(index, &acm->read_urbs_free)) |
379 | return 0; | |
1da177e4 | 380 | |
088c64f8 JH |
381 | dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index); |
382 | ||
383 | res = usb_submit_urb(acm->read_urbs[index], mem_flags); | |
384 | if (res) { | |
385 | if (res != -EPERM) { | |
386 | dev_err(&acm->data->dev, | |
387 | "%s - usb_submit_urb failed: %d\n", | |
388 | __func__, res); | |
389 | } | |
390 | set_bit(index, &acm->read_urbs_free); | |
391 | return res; | |
11ea859d | 392 | } |
1da177e4 | 393 | |
088c64f8 JH |
394 | return 0; |
395 | } | |
1da177e4 | 396 | |
088c64f8 JH |
397 | static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) |
398 | { | |
399 | int res; | |
400 | int i; | |
61a87adf | 401 | |
088c64f8 JH |
402 | for (i = 0; i < acm->rx_buflimit; ++i) { |
403 | res = acm_submit_read_urb(acm, i, mem_flags); | |
404 | if (res) | |
405 | return res; | |
86478944 | 406 | } |
088c64f8 JH |
407 | |
408 | return 0; | |
1da177e4 LT |
409 | } |
410 | ||
088c64f8 | 411 | static void acm_process_read_urb(struct acm *acm, struct urb *urb) |
1da177e4 | 412 | { |
10077d4a | 413 | struct tty_struct *tty; |
1da177e4 | 414 | |
088c64f8 | 415 | if (!urb->actual_length) |
ca79b7b4 | 416 | return; |
61a87adf | 417 | |
10077d4a | 418 | tty = tty_port_tty_get(&acm->port); |
088c64f8 JH |
419 | if (!tty) |
420 | return; | |
10077d4a | 421 | |
088c64f8 JH |
422 | tty_insert_flip_string(tty, urb->transfer_buffer, urb->actual_length); |
423 | tty_flip_buffer_push(tty); | |
61a87adf | 424 | |
10077d4a | 425 | tty_kref_put(tty); |
088c64f8 | 426 | } |
10077d4a | 427 | |
088c64f8 JH |
428 | static void acm_read_bulk_callback(struct urb *urb) |
429 | { | |
430 | struct acm_rb *rb = urb->context; | |
431 | struct acm *acm = rb->instance; | |
432 | unsigned long flags; | |
61a87adf | 433 | |
088c64f8 JH |
434 | dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__, |
435 | rb->index, urb->actual_length); | |
436 | set_bit(rb->index, &acm->read_urbs_free); | |
61a87adf | 437 | |
088c64f8 JH |
438 | if (!acm->dev) { |
439 | dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); | |
440 | return; | |
441 | } | |
442 | usb_mark_last_busy(acm->dev); | |
61a87adf | 443 | |
088c64f8 JH |
444 | if (urb->status) { |
445 | dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n", | |
446 | __func__, urb->status); | |
447 | return; | |
61a87adf | 448 | } |
088c64f8 JH |
449 | acm_process_read_urb(acm, urb); |
450 | ||
451 | /* throttle device if requested by tty */ | |
11ea859d | 452 | spin_lock_irqsave(&acm->read_lock, flags); |
088c64f8 JH |
453 | acm->throttled = acm->throttle_req; |
454 | if (!acm->throttled && !acm->susp_count) { | |
455 | spin_unlock_irqrestore(&acm->read_lock, flags); | |
456 | acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); | |
457 | } else { | |
458 | spin_unlock_irqrestore(&acm->read_lock, flags); | |
459 | } | |
1da177e4 LT |
460 | } |
461 | ||
462 | /* data interface wrote those outgoing bytes */ | |
7d12e780 | 463 | static void acm_write_bulk(struct urb *urb) |
1da177e4 | 464 | { |
cdc97792 | 465 | struct acm_wb *wb = urb->context; |
e5fbab51 | 466 | struct acm *acm = wb->instance; |
ad0b65ef | 467 | unsigned long flags; |
1da177e4 | 468 | |
4fa4626c JH |
469 | if (urb->status || (urb->actual_length != urb->transfer_buffer_length)) |
470 | dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n", | |
1d9846e5 | 471 | __func__, |
e5fbab51 DB |
472 | urb->actual_length, |
473 | urb->transfer_buffer_length, | |
474 | urb->status); | |
1da177e4 | 475 | |
ad0b65ef | 476 | spin_lock_irqsave(&acm->write_lock, flags); |
e4cf3aa8 | 477 | acm_write_done(acm, wb); |
ad0b65ef | 478 | spin_unlock_irqrestore(&acm->write_lock, flags); |
99823f45 | 479 | schedule_work(&acm->work); |
1da177e4 LT |
480 | } |
481 | ||
c4028958 | 482 | static void acm_softint(struct work_struct *work) |
1da177e4 | 483 | { |
c4028958 | 484 | struct acm *acm = container_of(work, struct acm, work); |
10077d4a | 485 | struct tty_struct *tty; |
e5fbab51 | 486 | |
1d9846e5 JH |
487 | dev_vdbg(&acm->data->dev, "%s\n", __func__); |
488 | ||
10077d4a | 489 | tty = tty_port_tty_get(&acm->port); |
15e5bee3 JH |
490 | if (!tty) |
491 | return; | |
10077d4a AC |
492 | tty_wakeup(tty); |
493 | tty_kref_put(tty); | |
1da177e4 LT |
494 | } |
495 | ||
496 | /* | |
497 | * TTY handlers | |
498 | */ | |
499 | ||
7fb57a01 | 500 | static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) |
1da177e4 LT |
501 | { |
502 | struct acm *acm; | |
7fb57a01 | 503 | int retval; |
1da177e4 | 504 | |
7fb57a01 | 505 | dev_dbg(tty->dev, "%s\n", __func__); |
1da177e4 | 506 | |
7fb57a01 HS |
507 | acm = acm_get_by_index(tty->index); |
508 | if (!acm) | |
509 | return -ENODEV; | |
a5cc7ef9 | 510 | |
f8a8c10f | 511 | retval = tty_standard_install(driver, tty); |
7fb57a01 HS |
512 | if (retval) |
513 | goto error_init_termios; | |
10077d4a | 514 | |
1da177e4 | 515 | tty->driver_data = acm; |
1da177e4 | 516 | |
7fb57a01 HS |
517 | return 0; |
518 | ||
519 | error_init_termios: | |
520 | tty_port_put(&acm->port); | |
521 | return retval; | |
522 | } | |
523 | ||
524 | static int acm_tty_open(struct tty_struct *tty, struct file *filp) | |
525 | { | |
526 | struct acm *acm = tty->driver_data; | |
527 | ||
528 | dev_dbg(tty->dev, "%s\n", __func__); | |
529 | ||
530 | return tty_port_open(&acm->port, tty, filp); | |
531 | } | |
532 | ||
533 | static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) | |
534 | { | |
535 | struct acm *acm = container_of(port, struct acm, port); | |
536 | int retval = -ENODEV; | |
537 | ||
538 | dev_dbg(&acm->control->dev, "%s\n", __func__); | |
1365baf7 ON |
539 | |
540 | mutex_lock(&acm->mutex); | |
7fb57a01 HS |
541 | if (acm->disconnected) |
542 | goto disconnected; | |
543 | ||
544 | retval = usb_autopm_get_interface(acm->control); | |
545 | if (retval) | |
546 | goto error_get_interface; | |
547 | ||
548 | /* | |
549 | * FIXME: Why do we need this? Allocating 64K of physically contiguous | |
550 | * memory is really nasty... | |
551 | */ | |
552 | set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); | |
553 | acm->control->needs_remote_wakeup = 1; | |
1365baf7 | 554 | |
1da177e4 LT |
555 | acm->ctrlurb->dev = acm->dev; |
556 | if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) { | |
a5cc7ef9 JH |
557 | dev_err(&acm->control->dev, |
558 | "%s - usb_submit_urb(ctrl irq) failed\n", __func__); | |
7fb57a01 | 559 | goto error_submit_urb; |
1da177e4 LT |
560 | } |
561 | ||
7fb57a01 HS |
562 | acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS; |
563 | if (acm_set_control(acm, acm->ctrlout) < 0 && | |
ca79b7b4 | 564 | (acm->ctrl_caps & USB_CDC_CAP_LINE)) |
7fb57a01 | 565 | goto error_set_control; |
10077d4a | 566 | |
11ea859d | 567 | usb_autopm_put_interface(acm->control); |
1da177e4 | 568 | |
6c4707f3 OM |
569 | /* |
570 | * Unthrottle device in case the TTY was closed while throttled. | |
571 | */ | |
572 | spin_lock_irq(&acm->read_lock); | |
573 | acm->throttled = 0; | |
574 | acm->throttle_req = 0; | |
575 | spin_unlock_irq(&acm->read_lock); | |
576 | ||
088c64f8 | 577 | if (acm_submit_read_urbs(acm, GFP_KERNEL)) |
7fb57a01 | 578 | goto error_submit_read_urbs; |
2b626dc1 | 579 | |
1365baf7 | 580 | mutex_unlock(&acm->mutex); |
1da177e4 | 581 | |
7fb57a01 HS |
582 | return 0; |
583 | ||
584 | error_submit_read_urbs: | |
585 | acm->ctrlout = 0; | |
586 | acm_set_control(acm, acm->ctrlout); | |
587 | error_set_control: | |
588 | usb_kill_urb(acm->ctrlurb); | |
589 | error_submit_urb: | |
2b626dc1 | 590 | usb_autopm_put_interface(acm->control); |
7fb57a01 HS |
591 | error_get_interface: |
592 | disconnected: | |
593 | mutex_unlock(&acm->mutex); | |
594 | return retval; | |
1da177e4 LT |
595 | } |
596 | ||
7fb57a01 | 597 | static void acm_port_destruct(struct tty_port *port) |
83ef344a | 598 | { |
7fb57a01 HS |
599 | struct acm *acm = container_of(port, struct acm, port); |
600 | ||
601 | dev_dbg(&acm->control->dev, "%s\n", __func__); | |
61a87adf | 602 | |
83ef344a | 603 | tty_unregister_device(acm_tty_driver, acm->minor); |
7fb57a01 | 604 | acm_release_minor(acm); |
83ef344a | 605 | usb_put_intf(acm->control); |
c4cabd28 | 606 | kfree(acm->country_codes); |
83ef344a | 607 | kfree(acm); |
608 | } | |
609 | ||
7fb57a01 | 610 | static void acm_port_shutdown(struct tty_port *port) |
10077d4a | 611 | { |
7fb57a01 | 612 | struct acm *acm = container_of(port, struct acm, port); |
dab54c9f JH |
613 | int i; |
614 | ||
7fb57a01 HS |
615 | dev_dbg(&acm->control->dev, "%s\n", __func__); |
616 | ||
617 | mutex_lock(&acm->mutex); | |
618 | if (!acm->disconnected) { | |
10077d4a AC |
619 | usb_autopm_get_interface(acm->control); |
620 | acm_set_control(acm, acm->ctrlout = 0); | |
10077d4a AC |
621 | usb_kill_urb(acm->ctrlurb); |
622 | for (i = 0; i < ACM_NW; i++) | |
623 | usb_kill_urb(acm->wb[i].urb); | |
dab54c9f | 624 | for (i = 0; i < acm->rx_buflimit; i++) |
088c64f8 | 625 | usb_kill_urb(acm->read_urbs[i]); |
10077d4a AC |
626 | acm->control->needs_remote_wakeup = 0; |
627 | usb_autopm_put_interface(acm->control); | |
628 | } | |
7fb57a01 HS |
629 | mutex_unlock(&acm->mutex); |
630 | } | |
631 | ||
632 | static void acm_tty_cleanup(struct tty_struct *tty) | |
633 | { | |
634 | struct acm *acm = tty->driver_data; | |
635 | dev_dbg(&acm->control->dev, "%s\n", __func__); | |
636 | tty_port_put(&acm->port); | |
10077d4a AC |
637 | } |
638 | ||
639 | static void acm_tty_hangup(struct tty_struct *tty) | |
640 | { | |
641 | struct acm *acm = tty->driver_data; | |
7fb57a01 | 642 | dev_dbg(&acm->control->dev, "%s\n", __func__); |
10077d4a | 643 | tty_port_hangup(&acm->port); |
10077d4a AC |
644 | } |
645 | ||
1da177e4 LT |
646 | static void acm_tty_close(struct tty_struct *tty, struct file *filp) |
647 | { | |
648 | struct acm *acm = tty->driver_data; | |
7fb57a01 HS |
649 | dev_dbg(&acm->control->dev, "%s\n", __func__); |
650 | tty_port_close(&acm->port, tty, filp); | |
1da177e4 LT |
651 | } |
652 | ||
6e47e069 AC |
653 | static int acm_tty_write(struct tty_struct *tty, |
654 | const unsigned char *buf, int count) | |
1da177e4 LT |
655 | { |
656 | struct acm *acm = tty->driver_data; | |
657 | int stat; | |
884b600f ON |
658 | unsigned long flags; |
659 | int wbn; | |
660 | struct acm_wb *wb; | |
661 | ||
1da177e4 LT |
662 | if (!count) |
663 | return 0; | |
664 | ||
5e9e75f8 | 665 | dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count); |
a5cc7ef9 | 666 | |
884b600f | 667 | spin_lock_irqsave(&acm->write_lock, flags); |
6e47e069 AC |
668 | wbn = acm_wb_alloc(acm); |
669 | if (wbn < 0) { | |
884b600f | 670 | spin_unlock_irqrestore(&acm->write_lock, flags); |
884b600f ON |
671 | return 0; |
672 | } | |
673 | wb = &acm->wb[wbn]; | |
1da177e4 | 674 | |
884b600f | 675 | count = (count > acm->writesize) ? acm->writesize : count; |
5e9e75f8 | 676 | dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count); |
884b600f ON |
677 | memcpy(wb->buf, buf, count); |
678 | wb->len = count; | |
679 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
1da177e4 | 680 | |
6e47e069 AC |
681 | stat = acm_write_start(acm, wbn); |
682 | if (stat < 0) | |
1da177e4 | 683 | return stat; |
1da177e4 LT |
684 | return count; |
685 | } | |
686 | ||
687 | static int acm_tty_write_room(struct tty_struct *tty) | |
688 | { | |
689 | struct acm *acm = tty->driver_data; | |
884b600f ON |
690 | /* |
691 | * Do not let the line discipline to know that we have a reserve, | |
692 | * or it might get too enthusiastic. | |
693 | */ | |
934da463 | 694 | return acm_wb_is_avail(acm) ? acm->writesize : 0; |
1da177e4 LT |
695 | } |
696 | ||
697 | static int acm_tty_chars_in_buffer(struct tty_struct *tty) | |
698 | { | |
699 | struct acm *acm = tty->driver_data; | |
7fb57a01 HS |
700 | /* |
701 | * if the device was unplugged then any remaining characters fell out | |
702 | * of the connector ;) | |
703 | */ | |
704 | if (acm->disconnected) | |
23198fda | 705 | return 0; |
884b600f ON |
706 | /* |
707 | * This is inaccurate (overcounts), but it works. | |
708 | */ | |
86478944 | 709 | return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; |
1da177e4 LT |
710 | } |
711 | ||
712 | static void acm_tty_throttle(struct tty_struct *tty) | |
713 | { | |
714 | struct acm *acm = tty->driver_data; | |
088c64f8 | 715 | |
088c64f8 JH |
716 | spin_lock_irq(&acm->read_lock); |
717 | acm->throttle_req = 1; | |
718 | spin_unlock_irq(&acm->read_lock); | |
1da177e4 LT |
719 | } |
720 | ||
721 | static void acm_tty_unthrottle(struct tty_struct *tty) | |
722 | { | |
723 | struct acm *acm = tty->driver_data; | |
088c64f8 JH |
724 | unsigned int was_throttled; |
725 | ||
088c64f8 JH |
726 | spin_lock_irq(&acm->read_lock); |
727 | was_throttled = acm->throttled; | |
728 | acm->throttled = 0; | |
729 | acm->throttle_req = 0; | |
730 | spin_unlock_irq(&acm->read_lock); | |
731 | ||
732 | if (was_throttled) | |
733 | acm_submit_read_urbs(acm, GFP_KERNEL); | |
1da177e4 LT |
734 | } |
735 | ||
9e98966c | 736 | static int acm_tty_break_ctl(struct tty_struct *tty, int state) |
1da177e4 LT |
737 | { |
738 | struct acm *acm = tty->driver_data; | |
9e98966c | 739 | int retval; |
7fb57a01 | 740 | |
9e98966c AC |
741 | retval = acm_send_break(acm, state ? 0xffff : 0); |
742 | if (retval < 0) | |
a5cc7ef9 JH |
743 | dev_dbg(&acm->control->dev, "%s - send break failed\n", |
744 | __func__); | |
9e98966c | 745 | return retval; |
1da177e4 LT |
746 | } |
747 | ||
60b33c13 | 748 | static int acm_tty_tiocmget(struct tty_struct *tty) |
1da177e4 LT |
749 | { |
750 | struct acm *acm = tty->driver_data; | |
751 | ||
1da177e4 LT |
752 | return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | |
753 | (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | | |
754 | (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | | |
755 | (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | | |
756 | (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | | |
757 | TIOCM_CTS; | |
758 | } | |
759 | ||
20b9d177 | 760 | static int acm_tty_tiocmset(struct tty_struct *tty, |
1da177e4 LT |
761 | unsigned int set, unsigned int clear) |
762 | { | |
763 | struct acm *acm = tty->driver_data; | |
764 | unsigned int newctrl; | |
765 | ||
1da177e4 | 766 | newctrl = acm->ctrlout; |
6e47e069 AC |
767 | set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | |
768 | (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); | |
769 | clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | | |
770 | (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); | |
1da177e4 LT |
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 | ||
18c75720 ON |
779 | static int get_serial_info(struct acm *acm, struct serial_struct __user *info) |
780 | { | |
781 | struct serial_struct tmp; | |
782 | ||
783 | if (!info) | |
784 | return -EINVAL; | |
785 | ||
786 | memset(&tmp, 0, sizeof(tmp)); | |
787 | tmp.flags = ASYNC_LOW_LATENCY; | |
788 | tmp.xmit_fifo_size = acm->writesize; | |
789 | tmp.baud_base = le32_to_cpu(acm->line.dwDTERate); | |
ba2d8ce9 DW |
790 | tmp.close_delay = acm->port.close_delay / 10; |
791 | tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? | |
792 | ASYNC_CLOSING_WAIT_NONE : | |
793 | acm->port.closing_wait / 10; | |
18c75720 ON |
794 | |
795 | if (copy_to_user(info, &tmp, sizeof(tmp))) | |
796 | return -EFAULT; | |
797 | else | |
798 | return 0; | |
799 | } | |
800 | ||
ba2d8ce9 DW |
801 | static int set_serial_info(struct acm *acm, |
802 | struct serial_struct __user *newinfo) | |
803 | { | |
804 | struct serial_struct new_serial; | |
805 | unsigned int closing_wait, close_delay; | |
806 | int retval = 0; | |
807 | ||
808 | if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) | |
809 | return -EFAULT; | |
810 | ||
811 | close_delay = new_serial.close_delay * 10; | |
812 | closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? | |
813 | ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; | |
814 | ||
815 | mutex_lock(&acm->port.mutex); | |
816 | ||
817 | if (!capable(CAP_SYS_ADMIN)) { | |
818 | if ((close_delay != acm->port.close_delay) || | |
819 | (closing_wait != acm->port.closing_wait)) | |
820 | retval = -EPERM; | |
821 | else | |
822 | retval = -EOPNOTSUPP; | |
823 | } else { | |
824 | acm->port.close_delay = close_delay; | |
825 | acm->port.closing_wait = closing_wait; | |
826 | } | |
827 | ||
828 | mutex_unlock(&acm->port.mutex); | |
829 | return retval; | |
830 | } | |
831 | ||
6caa76b7 | 832 | static int acm_tty_ioctl(struct tty_struct *tty, |
6e47e069 | 833 | unsigned int cmd, unsigned long arg) |
1da177e4 | 834 | { |
18c75720 ON |
835 | struct acm *acm = tty->driver_data; |
836 | int rv = -ENOIOCTLCMD; | |
837 | ||
838 | switch (cmd) { | |
839 | case TIOCGSERIAL: /* gets serial port data */ | |
840 | rv = get_serial_info(acm, (struct serial_struct __user *) arg); | |
ba2d8ce9 DW |
841 | break; |
842 | case TIOCSSERIAL: | |
843 | rv = set_serial_info(acm, (struct serial_struct __user *) arg); | |
18c75720 ON |
844 | break; |
845 | } | |
846 | ||
847 | return rv; | |
1da177e4 LT |
848 | } |
849 | ||
4c4c9432 | 850 | static const __u32 acm_tty_speed[] = { |
1da177e4 LT |
851 | 0, 50, 75, 110, 134, 150, 200, 300, 600, |
852 | 1200, 1800, 2400, 4800, 9600, 19200, 38400, | |
853 | 57600, 115200, 230400, 460800, 500000, 576000, | |
854 | 921600, 1000000, 1152000, 1500000, 2000000, | |
855 | 2500000, 3000000, 3500000, 4000000 | |
856 | }; | |
857 | ||
6e47e069 AC |
858 | static void acm_tty_set_termios(struct tty_struct *tty, |
859 | struct ktermios *termios_old) | |
1da177e4 LT |
860 | { |
861 | struct acm *acm = tty->driver_data; | |
adc8d746 | 862 | struct ktermios *termios = &tty->termios; |
1da177e4 LT |
863 | struct usb_cdc_line_coding newline; |
864 | int newctrl = acm->ctrlout; | |
865 | ||
9b80fee1 | 866 | newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); |
1da177e4 LT |
867 | newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; |
868 | newline.bParityType = termios->c_cflag & PARENB ? | |
6e47e069 AC |
869 | (termios->c_cflag & PARODD ? 1 : 2) + |
870 | (termios->c_cflag & CMSPAR ? 2 : 0) : 0; | |
301a29da NB |
871 | switch (termios->c_cflag & CSIZE) { |
872 | case CS5: | |
873 | newline.bDataBits = 5; | |
874 | break; | |
875 | case CS6: | |
876 | newline.bDataBits = 6; | |
877 | break; | |
878 | case CS7: | |
879 | newline.bDataBits = 7; | |
880 | break; | |
881 | case CS8: | |
882 | default: | |
883 | newline.bDataBits = 8; | |
884 | break; | |
885 | } | |
6e47e069 | 886 | /* FIXME: Needs to clear unsupported bits in the termios */ |
1da177e4 LT |
887 | acm->clocal = ((termios->c_cflag & CLOCAL) != 0); |
888 | ||
889 | if (!newline.dwDTERate) { | |
890 | newline.dwDTERate = acm->line.dwDTERate; | |
891 | newctrl &= ~ACM_CTRL_DTR; | |
6e47e069 AC |
892 | } else |
893 | newctrl |= ACM_CTRL_DTR; | |
1da177e4 LT |
894 | |
895 | if (newctrl != acm->ctrlout) | |
896 | acm_set_control(acm, acm->ctrlout = newctrl); | |
897 | ||
898 | if (memcmp(&acm->line, &newline, sizeof newline)) { | |
899 | memcpy(&acm->line, &newline, sizeof newline); | |
a5cc7ef9 JH |
900 | dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", |
901 | __func__, | |
902 | le32_to_cpu(newline.dwDTERate), | |
1da177e4 LT |
903 | newline.bCharFormat, newline.bParityType, |
904 | newline.bDataBits); | |
905 | acm_set_line(acm, &acm->line); | |
906 | } | |
907 | } | |
908 | ||
7fb57a01 HS |
909 | static const struct tty_port_operations acm_port_ops = { |
910 | .shutdown = acm_port_shutdown, | |
911 | .activate = acm_port_activate, | |
912 | .destruct = acm_port_destruct, | |
913 | }; | |
914 | ||
1da177e4 LT |
915 | /* |
916 | * USB probe and disconnect routines. | |
917 | */ | |
918 | ||
830f4021 | 919 | /* Little helpers: write/read buffers free */ |
884b600f ON |
920 | static void acm_write_buffers_free(struct acm *acm) |
921 | { | |
922 | int i; | |
923 | struct acm_wb *wb; | |
a496c64f | 924 | struct usb_device *usb_dev = interface_to_usbdev(acm->control); |
884b600f | 925 | |
6e47e069 | 926 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) |
997ea58e | 927 | usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah); |
884b600f ON |
928 | } |
929 | ||
830f4021 ON |
930 | static void acm_read_buffers_free(struct acm *acm) |
931 | { | |
932 | struct usb_device *usb_dev = interface_to_usbdev(acm->control); | |
dab54c9f | 933 | int i; |
830f4021 | 934 | |
dab54c9f | 935 | for (i = 0; i < acm->rx_buflimit; i++) |
997ea58e | 936 | usb_free_coherent(usb_dev, acm->readsize, |
088c64f8 | 937 | acm->read_buffers[i].base, acm->read_buffers[i].dma); |
830f4021 ON |
938 | } |
939 | ||
884b600f ON |
940 | /* Little helper: write buffers allocate */ |
941 | static int acm_write_buffers_alloc(struct acm *acm) | |
942 | { | |
943 | int i; | |
944 | struct acm_wb *wb; | |
945 | ||
86478944 | 946 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { |
997ea58e | 947 | wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, |
884b600f ON |
948 | &wb->dmah); |
949 | if (!wb->buf) { | |
950 | while (i != 0) { | |
951 | --i; | |
952 | --wb; | |
997ea58e | 953 | usb_free_coherent(acm->dev, acm->writesize, |
884b600f ON |
954 | wb->buf, wb->dmah); |
955 | } | |
956 | return -ENOMEM; | |
957 | } | |
958 | } | |
959 | return 0; | |
960 | } | |
961 | ||
10077d4a AC |
962 | static int acm_probe(struct usb_interface *intf, |
963 | const struct usb_device_id *id) | |
1da177e4 LT |
964 | { |
965 | struct usb_cdc_union_desc *union_header = NULL; | |
c4cabd28 | 966 | struct usb_cdc_country_functional_desc *cfd = NULL; |
c6dbf554 | 967 | unsigned char *buffer = intf->altsetting->extra; |
1da177e4 LT |
968 | int buflen = intf->altsetting->extralen; |
969 | struct usb_interface *control_interface; | |
970 | struct usb_interface *data_interface; | |
a2bfb4a3 ON |
971 | struct usb_endpoint_descriptor *epctrl = NULL; |
972 | struct usb_endpoint_descriptor *epread = NULL; | |
973 | struct usb_endpoint_descriptor *epwrite = NULL; | |
1da177e4 LT |
974 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
975 | struct acm *acm; | |
976 | int minor; | |
6e47e069 | 977 | int ctrlsize, readsize; |
1da177e4 LT |
978 | u8 *buf; |
979 | u8 ac_management_function = 0; | |
980 | u8 call_management_function = 0; | |
981 | int call_interface_num = -1; | |
fd5054c1 | 982 | int data_interface_num = -1; |
1da177e4 | 983 | unsigned long quirks; |
86478944 | 984 | int num_rx_buf; |
61a87adf | 985 | int i; |
a2bfb4a3 | 986 | int combined_interfaces = 0; |
1da177e4 | 987 | |
86478944 | 988 | /* normal quirks */ |
1da177e4 | 989 | quirks = (unsigned long)id->driver_info; |
86478944 ON |
990 | num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; |
991 | ||
992 | /* handle quirks deadly to normal probing*/ | |
1da177e4 LT |
993 | if (quirks == NO_UNION_NORMAL) { |
994 | data_interface = usb_ifnum_to_if(usb_dev, 1); | |
995 | control_interface = usb_ifnum_to_if(usb_dev, 0); | |
996 | goto skip_normal_probe; | |
997 | } | |
6e47e069 | 998 | |
1da177e4 LT |
999 | /* normal probing*/ |
1000 | if (!buffer) { | |
9908a32e | 1001 | dev_err(&intf->dev, "Weird descriptor references\n"); |
1da177e4 LT |
1002 | return -EINVAL; |
1003 | } | |
1004 | ||
1005 | if (!buflen) { | |
577045c0 TG |
1006 | if (intf->cur_altsetting->endpoint && |
1007 | intf->cur_altsetting->endpoint->extralen && | |
6e47e069 AC |
1008 | intf->cur_altsetting->endpoint->extra) { |
1009 | dev_dbg(&intf->dev, | |
1010 | "Seeking extra descriptors on endpoint\n"); | |
1da177e4 LT |
1011 | buflen = intf->cur_altsetting->endpoint->extralen; |
1012 | buffer = intf->cur_altsetting->endpoint->extra; | |
1013 | } else { | |
9908a32e GKH |
1014 | dev_err(&intf->dev, |
1015 | "Zero length descriptor references\n"); | |
1da177e4 LT |
1016 | return -EINVAL; |
1017 | } | |
1018 | } | |
1019 | ||
1020 | while (buflen > 0) { | |
6e47e069 | 1021 | if (buffer[1] != USB_DT_CS_INTERFACE) { |
9908a32e | 1022 | dev_err(&intf->dev, "skipping garbage\n"); |
1da177e4 LT |
1023 | goto next_desc; |
1024 | } | |
1025 | ||
6e47e069 AC |
1026 | switch (buffer[2]) { |
1027 | case USB_CDC_UNION_TYPE: /* we've found it */ | |
1028 | if (union_header) { | |
1029 | dev_err(&intf->dev, "More than one " | |
1030 | "union descriptor, skipping ...\n"); | |
1031 | goto next_desc; | |
1da177e4 | 1032 | } |
6e47e069 AC |
1033 | union_header = (struct usb_cdc_union_desc *)buffer; |
1034 | break; | |
1035 | case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ | |
1036 | cfd = (struct usb_cdc_country_functional_desc *)buffer; | |
1037 | break; | |
1038 | case USB_CDC_HEADER_TYPE: /* maybe check version */ | |
1039 | break; /* for now we ignore it */ | |
1040 | case USB_CDC_ACM_TYPE: | |
1041 | ac_management_function = buffer[3]; | |
1042 | break; | |
1043 | case USB_CDC_CALL_MANAGEMENT_TYPE: | |
1044 | call_management_function = buffer[3]; | |
1045 | call_interface_num = buffer[4]; | |
02f824ac | 1046 | if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3) |
6e47e069 AC |
1047 | dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n"); |
1048 | break; | |
1049 | default: | |
1050 | /* there are LOTS more CDC descriptors that | |
1051 | * could legitimately be found here. | |
1052 | */ | |
1053 | dev_dbg(&intf->dev, "Ignoring descriptor: " | |
1054 | "type %02x, length %d\n", | |
1055 | buffer[2], buffer[0]); | |
1056 | break; | |
1057 | } | |
1da177e4 LT |
1058 | next_desc: |
1059 | buflen -= buffer[0]; | |
1060 | buffer += buffer[0]; | |
1061 | } | |
1062 | ||
1063 | if (!union_header) { | |
1064 | if (call_interface_num > 0) { | |
6e47e069 | 1065 | dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); |
fd5054c1 ES |
1066 | /* quirks for Droids MuIn LCD */ |
1067 | if (quirks & NO_DATA_INTERFACE) | |
1068 | data_interface = usb_ifnum_to_if(usb_dev, 0); | |
1069 | else | |
1070 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); | |
1da177e4 LT |
1071 | control_interface = intf; |
1072 | } else { | |
a2bfb4a3 ON |
1073 | if (intf->cur_altsetting->desc.bNumEndpoints != 3) { |
1074 | dev_dbg(&intf->dev,"No union descriptor, giving up\n"); | |
1075 | return -ENODEV; | |
1076 | } else { | |
1077 | dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); | |
1078 | combined_interfaces = 1; | |
1079 | control_interface = data_interface = intf; | |
1080 | goto look_for_collapsed_interface; | |
1081 | } | |
1da177e4 LT |
1082 | } |
1083 | } else { | |
1084 | control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); | |
1085 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); | |
1086 | if (!control_interface || !data_interface) { | |
6e47e069 | 1087 | dev_dbg(&intf->dev, "no interfaces\n"); |
1da177e4 LT |
1088 | return -ENODEV; |
1089 | } | |
1090 | } | |
6e47e069 | 1091 | |
1da177e4 | 1092 | if (data_interface_num != call_interface_num) |
6e47e069 | 1093 | dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); |
1da177e4 | 1094 | |
a2bfb4a3 ON |
1095 | if (control_interface == data_interface) { |
1096 | /* some broken devices designed for windows work this way */ | |
1097 | dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); | |
1098 | combined_interfaces = 1; | |
1099 | /* a popular other OS doesn't use it */ | |
1100 | quirks |= NO_CAP_LINE; | |
1101 | if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { | |
1102 | dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); | |
1103 | return -EINVAL; | |
1104 | } | |
1105 | look_for_collapsed_interface: | |
1106 | for (i = 0; i < 3; i++) { | |
1107 | struct usb_endpoint_descriptor *ep; | |
1108 | ep = &data_interface->cur_altsetting->endpoint[i].desc; | |
1109 | ||
1110 | if (usb_endpoint_is_int_in(ep)) | |
1111 | epctrl = ep; | |
1112 | else if (usb_endpoint_is_bulk_out(ep)) | |
1113 | epwrite = ep; | |
1114 | else if (usb_endpoint_is_bulk_in(ep)) | |
1115 | epread = ep; | |
1116 | else | |
1117 | return -EINVAL; | |
1118 | } | |
1119 | if (!epctrl || !epread || !epwrite) | |
1120 | return -ENODEV; | |
1121 | else | |
1122 | goto made_compressed_probe; | |
1123 | } | |
1124 | ||
1da177e4 LT |
1125 | skip_normal_probe: |
1126 | ||
1127 | /*workaround for switched interfaces */ | |
6e47e069 AC |
1128 | if (data_interface->cur_altsetting->desc.bInterfaceClass |
1129 | != CDC_DATA_INTERFACE_TYPE) { | |
1130 | if (control_interface->cur_altsetting->desc.bInterfaceClass | |
1131 | == CDC_DATA_INTERFACE_TYPE) { | |
1da177e4 | 1132 | struct usb_interface *t; |
6e47e069 AC |
1133 | dev_dbg(&intf->dev, |
1134 | "Your device has switched interfaces.\n"); | |
1da177e4 LT |
1135 | t = control_interface; |
1136 | control_interface = data_interface; | |
1137 | data_interface = t; | |
1138 | } else { | |
1139 | return -EINVAL; | |
1140 | } | |
1141 | } | |
74da5d68 AS |
1142 | |
1143 | /* Accept probe requests only for the control interface */ | |
a2bfb4a3 | 1144 | if (!combined_interfaces && intf != control_interface) |
74da5d68 | 1145 | return -ENODEV; |
6e47e069 | 1146 | |
a2bfb4a3 ON |
1147 | if (!combined_interfaces && usb_interface_claimed(data_interface)) { |
1148 | /* valid in this context */ | |
6e47e069 | 1149 | dev_dbg(&intf->dev, "The data interface isn't available\n"); |
1da177e4 LT |
1150 | return -EBUSY; |
1151 | } | |
1152 | ||
1153 | ||
99f347ca SS |
1154 | if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || |
1155 | control_interface->cur_altsetting->desc.bNumEndpoints == 0) | |
1da177e4 LT |
1156 | return -EINVAL; |
1157 | ||
1158 | epctrl = &control_interface->cur_altsetting->endpoint[0].desc; | |
1159 | epread = &data_interface->cur_altsetting->endpoint[0].desc; | |
1160 | epwrite = &data_interface->cur_altsetting->endpoint[1].desc; | |
1161 | ||
1162 | ||
1163 | /* workaround for switched endpoints */ | |
45aea704 | 1164 | if (!usb_endpoint_dir_in(epread)) { |
1da177e4 LT |
1165 | /* descriptors are swapped */ |
1166 | struct usb_endpoint_descriptor *t; | |
6e47e069 AC |
1167 | dev_dbg(&intf->dev, |
1168 | "The data interface has switched endpoints\n"); | |
1da177e4 LT |
1169 | t = epread; |
1170 | epread = epwrite; | |
1171 | epwrite = t; | |
1172 | } | |
a2bfb4a3 | 1173 | made_compressed_probe: |
a5cc7ef9 | 1174 | dev_dbg(&intf->dev, "interfaces are valid\n"); |
1da177e4 | 1175 | |
6e47e069 AC |
1176 | acm = kzalloc(sizeof(struct acm), GFP_KERNEL); |
1177 | if (acm == NULL) { | |
255ab56c | 1178 | dev_err(&intf->dev, "out of memory (acm kzalloc)\n"); |
1da177e4 LT |
1179 | goto alloc_fail; |
1180 | } | |
1da177e4 | 1181 | |
7fb57a01 HS |
1182 | minor = acm_alloc_minor(acm); |
1183 | if (minor == ACM_TTY_MINORS) { | |
1184 | dev_err(&intf->dev, "no more free acm devices\n"); | |
1185 | kfree(acm); | |
1186 | return -ENODEV; | |
1187 | } | |
1188 | ||
29cc8897 KM |
1189 | ctrlsize = usb_endpoint_maxp(epctrl); |
1190 | readsize = usb_endpoint_maxp(epread) * | |
6e47e069 | 1191 | (quirks == SINGLE_RX_URB ? 1 : 2); |
a2bfb4a3 | 1192 | acm->combined_interfaces = combined_interfaces; |
29cc8897 | 1193 | acm->writesize = usb_endpoint_maxp(epwrite) * 20; |
1da177e4 LT |
1194 | acm->control = control_interface; |
1195 | acm->data = data_interface; | |
1196 | acm->minor = minor; | |
1197 | acm->dev = usb_dev; | |
1198 | acm->ctrl_caps = ac_management_function; | |
a2bfb4a3 ON |
1199 | if (quirks & NO_CAP_LINE) |
1200 | acm->ctrl_caps &= ~USB_CDC_CAP_LINE; | |
1da177e4 LT |
1201 | acm->ctrlsize = ctrlsize; |
1202 | acm->readsize = readsize; | |
86478944 | 1203 | acm->rx_buflimit = num_rx_buf; |
c4028958 | 1204 | INIT_WORK(&acm->work, acm_softint); |
884b600f | 1205 | spin_lock_init(&acm->write_lock); |
61a87adf | 1206 | spin_lock_init(&acm->read_lock); |
1365baf7 | 1207 | mutex_init(&acm->mutex); |
61a87adf | 1208 | acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); |
cf7fdd57 ON |
1209 | acm->is_int_ep = usb_endpoint_xfer_int(epread); |
1210 | if (acm->is_int_ep) | |
1211 | acm->bInterval = epread->bInterval; | |
739e0285 AC |
1212 | tty_port_init(&acm->port); |
1213 | acm->port.ops = &acm_port_ops; | |
1da177e4 | 1214 | |
997ea58e | 1215 | buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); |
1da177e4 | 1216 | if (!buf) { |
255ab56c | 1217 | dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n"); |
1da177e4 LT |
1218 | goto alloc_fail2; |
1219 | } | |
1220 | acm->ctrl_buffer = buf; | |
1221 | ||
884b600f | 1222 | if (acm_write_buffers_alloc(acm) < 0) { |
255ab56c | 1223 | dev_err(&intf->dev, "out of memory (write buffer alloc)\n"); |
1da177e4 LT |
1224 | goto alloc_fail4; |
1225 | } | |
1da177e4 LT |
1226 | |
1227 | acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); | |
1228 | if (!acm->ctrlurb) { | |
255ab56c | 1229 | dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n"); |
1da177e4 LT |
1230 | goto alloc_fail5; |
1231 | } | |
86478944 | 1232 | for (i = 0; i < num_rx_buf; i++) { |
088c64f8 JH |
1233 | struct acm_rb *rb = &(acm->read_buffers[i]); |
1234 | struct urb *urb; | |
61a87adf | 1235 | |
74f5e1ba JH |
1236 | rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, |
1237 | &rb->dma); | |
1238 | if (!rb->base) { | |
1239 | dev_err(&intf->dev, "out of memory " | |
1240 | "(read bufs usb_alloc_coherent)\n"); | |
1241 | goto alloc_fail6; | |
1242 | } | |
088c64f8 JH |
1243 | rb->index = i; |
1244 | rb->instance = acm; | |
74f5e1ba | 1245 | |
088c64f8 JH |
1246 | urb = usb_alloc_urb(0, GFP_KERNEL); |
1247 | if (!urb) { | |
255ab56c | 1248 | dev_err(&intf->dev, |
6e47e069 | 1249 | "out of memory (read urbs usb_alloc_urb)\n"); |
c2572b78 | 1250 | goto alloc_fail6; |
61a87adf | 1251 | } |
088c64f8 JH |
1252 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
1253 | urb->transfer_dma = rb->dma; | |
1254 | if (acm->is_int_ep) { | |
1255 | usb_fill_int_urb(urb, acm->dev, | |
1256 | acm->rx_endpoint, | |
1257 | rb->base, | |
1258 | acm->readsize, | |
1259 | acm_read_bulk_callback, rb, | |
1260 | acm->bInterval); | |
1261 | } else { | |
1262 | usb_fill_bulk_urb(urb, acm->dev, | |
1263 | acm->rx_endpoint, | |
1264 | rb->base, | |
1265 | acm->readsize, | |
1266 | acm_read_bulk_callback, rb); | |
1267 | } | |
61a87adf | 1268 | |
088c64f8 JH |
1269 | acm->read_urbs[i] = urb; |
1270 | __set_bit(i, &acm->read_urbs_free); | |
61a87adf | 1271 | } |
6e47e069 | 1272 | for (i = 0; i < ACM_NW; i++) { |
e4cf3aa8 DE |
1273 | struct acm_wb *snd = &(acm->wb[i]); |
1274 | ||
6e47e069 AC |
1275 | snd->urb = usb_alloc_urb(0, GFP_KERNEL); |
1276 | if (snd->urb == NULL) { | |
255ab56c | 1277 | dev_err(&intf->dev, |
59d7fec7 | 1278 | "out of memory (write urbs usb_alloc_urb)\n"); |
74f5e1ba | 1279 | goto alloc_fail7; |
e4cf3aa8 DE |
1280 | } |
1281 | ||
5186ffee AL |
1282 | if (usb_endpoint_xfer_int(epwrite)) |
1283 | usb_fill_int_urb(snd->urb, usb_dev, | |
c5211187 | 1284 | usb_sndintpipe(usb_dev, epwrite->bEndpointAddress), |
5186ffee AL |
1285 | NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); |
1286 | else | |
1287 | usb_fill_bulk_urb(snd->urb, usb_dev, | |
1288 | usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), | |
1289 | NULL, acm->writesize, acm_write_bulk, snd); | |
e4cf3aa8 DE |
1290 | snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
1291 | snd->instance = acm; | |
1da177e4 LT |
1292 | } |
1293 | ||
6e47e069 | 1294 | usb_set_intfdata(intf, acm); |
c4cabd28 ON |
1295 | |
1296 | i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); | |
1297 | if (i < 0) | |
74f5e1ba | 1298 | goto alloc_fail7; |
c4cabd28 ON |
1299 | |
1300 | if (cfd) { /* export the country data */ | |
1301 | acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); | |
1302 | if (!acm->country_codes) | |
1303 | goto skip_countries; | |
1304 | acm->country_code_size = cfd->bLength - 4; | |
6e47e069 AC |
1305 | memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, |
1306 | cfd->bLength - 4); | |
c4cabd28 ON |
1307 | acm->country_rel_date = cfd->iCountryCodeRelDate; |
1308 | ||
1309 | i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); | |
1310 | if (i < 0) { | |
1311 | kfree(acm->country_codes); | |
e7c8e860 JL |
1312 | acm->country_codes = NULL; |
1313 | acm->country_code_size = 0; | |
c4cabd28 ON |
1314 | goto skip_countries; |
1315 | } | |
1316 | ||
6e47e069 AC |
1317 | i = device_create_file(&intf->dev, |
1318 | &dev_attr_iCountryCodeRelDate); | |
c4cabd28 | 1319 | if (i < 0) { |
c2572b78 | 1320 | device_remove_file(&intf->dev, &dev_attr_wCountryCodes); |
c4cabd28 | 1321 | kfree(acm->country_codes); |
e7c8e860 JL |
1322 | acm->country_codes = NULL; |
1323 | acm->country_code_size = 0; | |
c4cabd28 ON |
1324 | goto skip_countries; |
1325 | } | |
1326 | } | |
1327 | ||
1328 | skip_countries: | |
6e47e069 | 1329 | usb_fill_int_urb(acm->ctrlurb, usb_dev, |
a2bfb4a3 ON |
1330 | usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), |
1331 | acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, | |
1332 | /* works around buggy devices */ | |
1333 | epctrl->bInterval ? epctrl->bInterval : 0xff); | |
1da177e4 LT |
1334 | acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
1335 | acm->ctrlurb->transfer_dma = acm->ctrl_dma; | |
1336 | ||
1da177e4 LT |
1337 | dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); |
1338 | ||
1339 | acm_set_control(acm, acm->ctrlout); | |
1340 | ||
1341 | acm->line.dwDTERate = cpu_to_le32(9600); | |
1342 | acm->line.bDataBits = 8; | |
1343 | acm_set_line(acm, &acm->line); | |
1344 | ||
1345 | usb_driver_claim_interface(&acm_driver, data_interface, acm); | |
672c4e18 | 1346 | usb_set_intfdata(data_interface, acm); |
1da177e4 | 1347 | |
83ef344a | 1348 | usb_get_intf(control_interface); |
734cc178 JS |
1349 | tty_port_register_device(&acm->port, acm_tty_driver, minor, |
1350 | &control_interface->dev); | |
1da177e4 | 1351 | |
c4cabd28 | 1352 | return 0; |
74f5e1ba | 1353 | alloc_fail7: |
e4cf3aa8 DE |
1354 | for (i = 0; i < ACM_NW; i++) |
1355 | usb_free_urb(acm->wb[i].urb); | |
c2572b78 | 1356 | alloc_fail6: |
86478944 | 1357 | for (i = 0; i < num_rx_buf; i++) |
088c64f8 | 1358 | usb_free_urb(acm->read_urbs[i]); |
74f5e1ba | 1359 | acm_read_buffers_free(acm); |
1da177e4 LT |
1360 | usb_free_urb(acm->ctrlurb); |
1361 | alloc_fail5: | |
884b600f | 1362 | acm_write_buffers_free(acm); |
1da177e4 | 1363 | alloc_fail4: |
997ea58e | 1364 | usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); |
1da177e4 | 1365 | alloc_fail2: |
7fb57a01 | 1366 | acm_release_minor(acm); |
1da177e4 LT |
1367 | kfree(acm); |
1368 | alloc_fail: | |
1369 | return -ENOMEM; | |
1370 | } | |
1371 | ||
1365baf7 ON |
1372 | static void stop_data_traffic(struct acm *acm) |
1373 | { | |
1374 | int i; | |
a5cc7ef9 JH |
1375 | |
1376 | dev_dbg(&acm->control->dev, "%s\n", __func__); | |
1365baf7 | 1377 | |
1365baf7 | 1378 | usb_kill_urb(acm->ctrlurb); |
6e47e069 | 1379 | for (i = 0; i < ACM_NW; i++) |
e4cf3aa8 | 1380 | usb_kill_urb(acm->wb[i].urb); |
1365baf7 | 1381 | for (i = 0; i < acm->rx_buflimit; i++) |
088c64f8 | 1382 | usb_kill_urb(acm->read_urbs[i]); |
1365baf7 ON |
1383 | |
1384 | cancel_work_sync(&acm->work); | |
1385 | } | |
1386 | ||
1da177e4 LT |
1387 | static void acm_disconnect(struct usb_interface *intf) |
1388 | { | |
c4cabd28 | 1389 | struct acm *acm = usb_get_intfdata(intf); |
1da177e4 | 1390 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
10077d4a | 1391 | struct tty_struct *tty; |
7fb57a01 HS |
1392 | int i; |
1393 | ||
1394 | dev_dbg(&intf->dev, "%s\n", __func__); | |
1da177e4 | 1395 | |
672c4e18 DB |
1396 | /* sibling interface is already cleaning up */ |
1397 | if (!acm) | |
86067eea | 1398 | return; |
672c4e18 | 1399 | |
7fb57a01 HS |
1400 | mutex_lock(&acm->mutex); |
1401 | acm->disconnected = true; | |
6e47e069 | 1402 | if (acm->country_codes) { |
74da5d68 AS |
1403 | device_remove_file(&acm->control->dev, |
1404 | &dev_attr_wCountryCodes); | |
1405 | device_remove_file(&acm->control->dev, | |
1406 | &dev_attr_iCountryCodeRelDate); | |
c4cabd28 | 1407 | } |
74da5d68 | 1408 | device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); |
86067eea ON |
1409 | usb_set_intfdata(acm->control, NULL); |
1410 | usb_set_intfdata(acm->data, NULL); | |
7fb57a01 HS |
1411 | mutex_unlock(&acm->mutex); |
1412 | ||
1413 | tty = tty_port_tty_get(&acm->port); | |
1414 | if (tty) { | |
1415 | tty_vhangup(tty); | |
1416 | tty_kref_put(tty); | |
1417 | } | |
1da177e4 | 1418 | |
1365baf7 | 1419 | stop_data_traffic(acm); |
1da177e4 | 1420 | |
7fb57a01 HS |
1421 | usb_free_urb(acm->ctrlurb); |
1422 | for (i = 0; i < ACM_NW; i++) | |
1423 | usb_free_urb(acm->wb[i].urb); | |
1424 | for (i = 0; i < acm->rx_buflimit; i++) | |
1425 | usb_free_urb(acm->read_urbs[i]); | |
884b600f | 1426 | acm_write_buffers_free(acm); |
7fb57a01 | 1427 | usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); |
830f4021 | 1428 | acm_read_buffers_free(acm); |
1da177e4 | 1429 | |
a2bfb4a3 ON |
1430 | if (!acm->combined_interfaces) |
1431 | usb_driver_release_interface(&acm_driver, intf == acm->control ? | |
830f4021 | 1432 | acm->data : acm->control); |
1da177e4 | 1433 | |
7fb57a01 | 1434 | tty_port_put(&acm->port); |
1da177e4 LT |
1435 | } |
1436 | ||
35758589 | 1437 | #ifdef CONFIG_PM |
1365baf7 ON |
1438 | static int acm_suspend(struct usb_interface *intf, pm_message_t message) |
1439 | { | |
1440 | struct acm *acm = usb_get_intfdata(intf); | |
11ea859d ON |
1441 | int cnt; |
1442 | ||
5b1b0b81 | 1443 | if (PMSG_IS_AUTO(message)) { |
11ea859d ON |
1444 | int b; |
1445 | ||
088c64f8 JH |
1446 | spin_lock_irq(&acm->write_lock); |
1447 | b = acm->transmitting; | |
1448 | spin_unlock_irq(&acm->write_lock); | |
11ea859d ON |
1449 | if (b) |
1450 | return -EBUSY; | |
1451 | } | |
1452 | ||
1453 | spin_lock_irq(&acm->read_lock); | |
1454 | spin_lock(&acm->write_lock); | |
1455 | cnt = acm->susp_count++; | |
1456 | spin_unlock(&acm->write_lock); | |
1457 | spin_unlock_irq(&acm->read_lock); | |
1365baf7 | 1458 | |
11ea859d | 1459 | if (cnt) |
1365baf7 | 1460 | return 0; |
1365baf7 | 1461 | |
7fb57a01 | 1462 | if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) |
1365baf7 ON |
1463 | stop_data_traffic(acm); |
1464 | ||
1365baf7 ON |
1465 | return 0; |
1466 | } | |
1467 | ||
1468 | static int acm_resume(struct usb_interface *intf) | |
1469 | { | |
1470 | struct acm *acm = usb_get_intfdata(intf); | |
97d35f95 | 1471 | struct acm_wb *wb; |
1365baf7 | 1472 | int rv = 0; |
11ea859d | 1473 | int cnt; |
1365baf7 | 1474 | |
11ea859d ON |
1475 | spin_lock_irq(&acm->read_lock); |
1476 | acm->susp_count -= 1; | |
1477 | cnt = acm->susp_count; | |
1478 | spin_unlock_irq(&acm->read_lock); | |
1479 | ||
1480 | if (cnt) | |
1365baf7 ON |
1481 | return 0; |
1482 | ||
7fb57a01 | 1483 | if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) { |
1365baf7 | 1484 | rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO); |
97d35f95 ON |
1485 | |
1486 | spin_lock_irq(&acm->write_lock); | |
1487 | if (acm->delayed_wb) { | |
1488 | wb = acm->delayed_wb; | |
1489 | acm->delayed_wb = NULL; | |
1490 | spin_unlock_irq(&acm->write_lock); | |
f0730924 | 1491 | acm_start_wb(acm, wb); |
97d35f95 ON |
1492 | } else { |
1493 | spin_unlock_irq(&acm->write_lock); | |
1494 | } | |
1495 | ||
1496 | /* | |
1497 | * delayed error checking because we must | |
1498 | * do the write path at all cost | |
1499 | */ | |
1365baf7 | 1500 | if (rv < 0) |
11ea859d | 1501 | goto err_out; |
1365baf7 | 1502 | |
088c64f8 | 1503 | rv = acm_submit_read_urbs(acm, GFP_NOIO); |
1365baf7 ON |
1504 | } |
1505 | ||
1506 | err_out: | |
1365baf7 ON |
1507 | return rv; |
1508 | } | |
35758589 | 1509 | |
a91b0c50 FL |
1510 | static int acm_reset_resume(struct usb_interface *intf) |
1511 | { | |
1512 | struct acm *acm = usb_get_intfdata(intf); | |
1513 | struct tty_struct *tty; | |
1514 | ||
7fb57a01 | 1515 | if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) { |
a91b0c50 FL |
1516 | tty = tty_port_tty_get(&acm->port); |
1517 | if (tty) { | |
1518 | tty_hangup(tty); | |
1519 | tty_kref_put(tty); | |
1520 | } | |
1521 | } | |
7fb57a01 | 1522 | |
a91b0c50 FL |
1523 | return acm_resume(intf); |
1524 | } | |
1525 | ||
35758589 | 1526 | #endif /* CONFIG_PM */ |
c1479a92 AT |
1527 | |
1528 | #define NOKIA_PCSUITE_ACM_INFO(x) \ | |
1529 | USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ | |
1530 | USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ | |
1531 | USB_CDC_ACM_PROTO_VENDOR) | |
1532 | ||
4035e456 TG |
1533 | #define SAMSUNG_PCSUITE_ACM_INFO(x) \ |
1534 | USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ | |
1535 | USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ | |
1536 | USB_CDC_ACM_PROTO_VENDOR) | |
1537 | ||
1da177e4 LT |
1538 | /* |
1539 | * USB driver structure. | |
1540 | */ | |
1541 | ||
6ef4852b | 1542 | static const struct usb_device_id acm_ids[] = { |
1da177e4 LT |
1543 | /* quirky and broken devices */ |
1544 | { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ | |
1545 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1546 | }, | |
b0e2a705 AA |
1547 | { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ |
1548 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1549 | }, | |
0f9c7b4a AL |
1550 | { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ |
1551 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1552 | }, | |
8753e65e MO |
1553 | { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ |
1554 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1555 | }, | |
91a9c921 CM |
1556 | { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ |
1557 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1558 | }, | |
7abcf20b AC |
1559 | { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ |
1560 | .driver_info = SINGLE_RX_URB, | |
1561 | }, | |
86478944 ON |
1562 | { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ |
1563 | .driver_info = SINGLE_RX_URB, /* firmware bug */ | |
1564 | }, | |
3dd2ae81 ON |
1565 | { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ |
1566 | .driver_info = SINGLE_RX_URB, /* firmware bug */ | |
1567 | }, | |
9be8456c ON |
1568 | { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ |
1569 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1570 | }, | |
6149ed5e IM |
1571 | { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ |
1572 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1573 | }, | |
c8fd2c37 ES |
1574 | { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ |
1575 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1576 | }, | |
c89c60e9 AC |
1577 | { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ |
1578 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1579 | }, | |
cab98a0a XK |
1580 | { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ |
1581 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1582 | }, | |
155df65a DT |
1583 | { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ |
1584 | }, | |
6abff5dc KH |
1585 | /* Motorola H24 HSPA module: */ |
1586 | { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ | |
1587 | { USB_DEVICE(0x22b8, 0x2d92) }, /* modem + diagnostics */ | |
1588 | { USB_DEVICE(0x22b8, 0x2d93) }, /* modem + AT port */ | |
1589 | { USB_DEVICE(0x22b8, 0x2d95) }, /* modem + AT port + diagnostics */ | |
1590 | { USB_DEVICE(0x22b8, 0x2d96) }, /* modem + NMEA */ | |
1591 | { USB_DEVICE(0x22b8, 0x2d97) }, /* modem + diagnostics + NMEA */ | |
1592 | { USB_DEVICE(0x22b8, 0x2d99) }, /* modem + AT port + NMEA */ | |
1593 | { USB_DEVICE(0x22b8, 0x2d9a) }, /* modem + AT port + diagnostics + NMEA */ | |
1594 | ||
c332b4e1 AR |
1595 | { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ |
1596 | .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on | |
1597 | data interface instead of | |
1598 | communications interface. | |
1599 | Maybe we should define a new | |
1600 | quirk for this. */ | |
1601 | }, | |
e7d491a1 JCR |
1602 | { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ |
1603 | .driver_info = NO_UNION_NORMAL, | |
1604 | }, | |
1f17c502 KK |
1605 | { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ |
1606 | .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ | |
1607 | }, | |
c3baa19b RN |
1608 | { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ |
1609 | .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ | |
1610 | }, | |
9be8456c | 1611 | |
c1479a92 AT |
1612 | /* Nokia S60 phones expose two ACM channels. The first is |
1613 | * a modem and is picked up by the standard AT-command | |
1614 | * information below. The second is 'vendor-specific' but | |
1615 | * is treated as a serial device at the S60 end, so we want | |
1616 | * to expose it on Linux too. */ | |
1617 | { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ | |
1618 | { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ | |
1619 | { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ | |
1620 | { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ | |
1621 | { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ | |
1622 | { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ | |
1623 | { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ | |
1624 | { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ | |
1625 | { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ | |
1626 | { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ | |
1627 | { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ | |
1628 | { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ | |
1629 | { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ | |
1630 | { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ | |
1631 | { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ | |
1632 | { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ | |
1633 | { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ | |
1634 | { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ | |
1635 | { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ | |
1636 | { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ | |
1637 | { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ | |
1638 | { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ | |
1639 | { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ | |
1640 | { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ | |
1641 | { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ | |
1642 | { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ | |
1643 | { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ | |
1644 | { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ | |
1645 | { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ | |
1646 | { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ | |
1647 | { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ | |
1648 | { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ | |
1649 | { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ | |
1650 | { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ | |
1651 | { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ | |
1652 | { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ | |
1653 | { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ | |
1654 | { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ | |
1655 | { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ | |
1656 | { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ | |
1657 | { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ | |
1658 | { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ | |
1659 | { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ | |
83a4eae9 | 1660 | { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ |
4035e456 TG |
1661 | { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ |
1662 | { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ | |
1663 | { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ | |
1664 | { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ | |
1665 | { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ | |
1666 | { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ | |
1667 | { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ | |
1668 | { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ | |
1669 | { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ | |
1670 | { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ | |
721d92fc | 1671 | { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ |
4061fde2 TG |
1672 | { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ |
1673 | { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ | |
4035e456 | 1674 | { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ |
c1479a92 | 1675 | |
65e52f41 DP |
1676 | /* Support for Owen devices */ |
1677 | { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ | |
1678 | ||
c1479a92 AT |
1679 | /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ |
1680 | ||
7c5d8c39 | 1681 | /* Support Lego NXT using pbLua firmware */ |
ce126644 JC |
1682 | { USB_DEVICE(0x0694, 0xff00), |
1683 | .driver_info = NOT_A_MODEM, | |
7893afc0 | 1684 | }, |
7c5d8c39 | 1685 | |
fd5054c1 ES |
1686 | /* Support for Droids MuIn LCD */ |
1687 | { USB_DEVICE(0x04d8, 0x000b), | |
1688 | .driver_info = NO_DATA_INTERFACE, | |
1689 | }, | |
1690 | ||
5b239f0a PC |
1691 | /* control interfaces without any protocol set */ |
1692 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1693 | USB_CDC_PROTO_NONE) }, | |
1694 | ||
1da177e4 LT |
1695 | /* control interfaces with various AT-command sets */ |
1696 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1697 | USB_CDC_ACM_PROTO_AT_V25TER) }, | |
1698 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1699 | USB_CDC_ACM_PROTO_AT_PCCA101) }, | |
1700 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1701 | USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, | |
1702 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1703 | USB_CDC_ACM_PROTO_AT_GSM) }, | |
1704 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
6e47e069 | 1705 | USB_CDC_ACM_PROTO_AT_3G) }, |
1da177e4 LT |
1706 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
1707 | USB_CDC_ACM_PROTO_AT_CDMA) }, | |
1708 | ||
1da177e4 LT |
1709 | { } |
1710 | }; | |
1711 | ||
6e47e069 | 1712 | MODULE_DEVICE_TABLE(usb, acm_ids); |
1da177e4 LT |
1713 | |
1714 | static struct usb_driver acm_driver = { | |
1da177e4 LT |
1715 | .name = "cdc_acm", |
1716 | .probe = acm_probe, | |
1717 | .disconnect = acm_disconnect, | |
35758589 | 1718 | #ifdef CONFIG_PM |
1365baf7 ON |
1719 | .suspend = acm_suspend, |
1720 | .resume = acm_resume, | |
a91b0c50 | 1721 | .reset_resume = acm_reset_resume, |
35758589 | 1722 | #endif |
1da177e4 | 1723 | .id_table = acm_ids, |
35758589 | 1724 | #ifdef CONFIG_PM |
1365baf7 | 1725 | .supports_autosuspend = 1, |
35758589 | 1726 | #endif |
e1f12eb6 | 1727 | .disable_hub_initiated_lpm = 1, |
1da177e4 LT |
1728 | }; |
1729 | ||
1730 | /* | |
1731 | * TTY driver structures. | |
1732 | */ | |
1733 | ||
b68e31d0 | 1734 | static const struct tty_operations acm_ops = { |
7fb57a01 | 1735 | .install = acm_tty_install, |
1da177e4 LT |
1736 | .open = acm_tty_open, |
1737 | .close = acm_tty_close, | |
7fb57a01 | 1738 | .cleanup = acm_tty_cleanup, |
10077d4a | 1739 | .hangup = acm_tty_hangup, |
1da177e4 LT |
1740 | .write = acm_tty_write, |
1741 | .write_room = acm_tty_write_room, | |
1742 | .ioctl = acm_tty_ioctl, | |
1743 | .throttle = acm_tty_throttle, | |
1744 | .unthrottle = acm_tty_unthrottle, | |
1745 | .chars_in_buffer = acm_tty_chars_in_buffer, | |
1746 | .break_ctl = acm_tty_break_ctl, | |
1747 | .set_termios = acm_tty_set_termios, | |
1748 | .tiocmget = acm_tty_tiocmget, | |
1749 | .tiocmset = acm_tty_tiocmset, | |
1750 | }; | |
1751 | ||
1752 | /* | |
1753 | * Init / exit. | |
1754 | */ | |
1755 | ||
1756 | static int __init acm_init(void) | |
1757 | { | |
1758 | int retval; | |
1759 | acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); | |
1760 | if (!acm_tty_driver) | |
1761 | return -ENOMEM; | |
1da177e4 LT |
1762 | acm_tty_driver->driver_name = "acm", |
1763 | acm_tty_driver->name = "ttyACM", | |
1da177e4 LT |
1764 | acm_tty_driver->major = ACM_TTY_MAJOR, |
1765 | acm_tty_driver->minor_start = 0, | |
1766 | acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, | |
1767 | acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, | |
331b8319 | 1768 | acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
1da177e4 | 1769 | acm_tty_driver->init_termios = tty_std_termios; |
6e47e069 AC |
1770 | acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | |
1771 | HUPCL | CLOCAL; | |
1da177e4 LT |
1772 | tty_set_operations(acm_tty_driver, &acm_ops); |
1773 | ||
1774 | retval = tty_register_driver(acm_tty_driver); | |
1775 | if (retval) { | |
1776 | put_tty_driver(acm_tty_driver); | |
1777 | return retval; | |
1778 | } | |
1779 | ||
1780 | retval = usb_register(&acm_driver); | |
1781 | if (retval) { | |
1782 | tty_unregister_driver(acm_tty_driver); | |
1783 | put_tty_driver(acm_tty_driver); | |
1784 | return retval; | |
1785 | } | |
1786 | ||
a2c7b935 | 1787 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
1da177e4 LT |
1788 | |
1789 | return 0; | |
1790 | } | |
1791 | ||
1792 | static void __exit acm_exit(void) | |
1793 | { | |
1794 | usb_deregister(&acm_driver); | |
1795 | tty_unregister_driver(acm_tty_driver); | |
1796 | put_tty_driver(acm_tty_driver); | |
1797 | } | |
1798 | ||
1799 | module_init(acm_init); | |
1800 | module_exit(acm_exit); | |
1801 | ||
6e47e069 AC |
1802 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1803 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 | 1804 | MODULE_LICENSE("GPL"); |
e766aeb8 | 1805 | MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); |