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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * cdc-acm.c | |
3 | * | |
4 | * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> | |
5 | * Copyright (c) 1999 Pavel Machek <pavel@suse.cz> | |
6 | * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com> | |
7 | * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> | |
8 | * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name> | |
61a87adf | 9 | * Copyright (c) 2005 David Kubicek <dave@awk.cz> |
1da177e4 LT |
10 | * |
11 | * USB Abstract Control Model driver for USB modems and ISDN adapters | |
12 | * | |
13 | * Sponsored by SuSE | |
14 | * | |
15 | * ChangeLog: | |
16 | * v0.9 - thorough cleaning, URBification, almost a rewrite | |
17 | * v0.10 - some more cleanups | |
18 | * v0.11 - fixed flow control, read error doesn't stop reads | |
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 | ||
e5fbab51 DB |
97 | #ifdef VERBOSE_DEBUG |
98 | #define verbose 1 | |
99 | #else | |
100 | #define verbose 0 | |
101 | #endif | |
102 | ||
1da177e4 LT |
103 | /* |
104 | * Functions for ACM control messages. | |
105 | */ | |
106 | ||
6e47e069 AC |
107 | static int acm_ctrl_msg(struct acm *acm, int request, int value, |
108 | void *buf, int len) | |
1da177e4 LT |
109 | { |
110 | int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), | |
111 | request, USB_RT_ACM, value, | |
112 | acm->control->altsetting[0].desc.bInterfaceNumber, | |
113 | buf, len, 5000); | |
6e47e069 AC |
114 | dbg("acm_control_msg: rq: 0x%02x val: %#x len: %#x result: %d", |
115 | request, value, len, retval); | |
1da177e4 LT |
116 | return retval < 0 ? retval : 0; |
117 | } | |
118 | ||
119 | /* devices aren't required to support these requests. | |
120 | * the cdc acm descriptor tells whether they do... | |
121 | */ | |
122 | #define acm_set_control(acm, control) \ | |
123 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0) | |
124 | #define acm_set_line(acm, line) \ | |
125 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) | |
126 | #define acm_send_break(acm, ms) \ | |
127 | acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) | |
128 | ||
884b600f ON |
129 | /* |
130 | * Write buffer management. | |
131 | * All of these assume proper locks taken by the caller. | |
132 | */ | |
133 | ||
134 | static int acm_wb_alloc(struct acm *acm) | |
135 | { | |
136 | int i, wbn; | |
137 | struct acm_wb *wb; | |
138 | ||
e4cf3aa8 | 139 | wbn = 0; |
884b600f ON |
140 | i = 0; |
141 | for (;;) { | |
142 | wb = &acm->wb[wbn]; | |
143 | if (!wb->use) { | |
144 | wb->use = 1; | |
145 | return wbn; | |
146 | } | |
86478944 ON |
147 | wbn = (wbn + 1) % ACM_NW; |
148 | if (++i >= ACM_NW) | |
884b600f ON |
149 | return -1; |
150 | } | |
151 | } | |
152 | ||
884b600f ON |
153 | static int acm_wb_is_avail(struct acm *acm) |
154 | { | |
155 | int i, n; | |
e5fbab51 | 156 | unsigned long flags; |
884b600f | 157 | |
86478944 | 158 | n = ACM_NW; |
e5fbab51 | 159 | spin_lock_irqsave(&acm->write_lock, flags); |
6e47e069 | 160 | for (i = 0; i < ACM_NW; i++) |
86478944 | 161 | n -= acm->wb[i].use; |
e5fbab51 | 162 | spin_unlock_irqrestore(&acm->write_lock, flags); |
884b600f ON |
163 | return n; |
164 | } | |
165 | ||
884b600f | 166 | /* |
ad0b65ef | 167 | * Finish write. Caller must hold acm->write_lock |
884b600f | 168 | */ |
e4cf3aa8 | 169 | static void acm_write_done(struct acm *acm, struct acm_wb *wb) |
884b600f | 170 | { |
e4cf3aa8 | 171 | wb->use = 0; |
11ea859d | 172 | acm->transmitting--; |
884b600f ON |
173 | } |
174 | ||
175 | /* | |
176 | * Poke write. | |
11ea859d ON |
177 | * |
178 | * the caller is responsible for locking | |
884b600f | 179 | */ |
11ea859d ON |
180 | |
181 | static int acm_start_wb(struct acm *acm, struct acm_wb *wb) | |
182 | { | |
183 | int rc; | |
184 | ||
185 | acm->transmitting++; | |
186 | ||
187 | wb->urb->transfer_buffer = wb->buf; | |
188 | wb->urb->transfer_dma = wb->dmah; | |
189 | wb->urb->transfer_buffer_length = wb->len; | |
190 | wb->urb->dev = acm->dev; | |
191 | ||
6e47e069 AC |
192 | rc = usb_submit_urb(wb->urb, GFP_ATOMIC); |
193 | if (rc < 0) { | |
11ea859d ON |
194 | dbg("usb_submit_urb(write bulk) failed: %d", rc); |
195 | acm_write_done(acm, wb); | |
196 | } | |
197 | return rc; | |
198 | } | |
199 | ||
e4cf3aa8 | 200 | static int acm_write_start(struct acm *acm, int wbn) |
884b600f ON |
201 | { |
202 | unsigned long flags; | |
934da463 | 203 | struct acm_wb *wb = &acm->wb[wbn]; |
884b600f ON |
204 | int rc; |
205 | ||
206 | spin_lock_irqsave(&acm->write_lock, flags); | |
207 | if (!acm->dev) { | |
934da463 | 208 | wb->use = 0; |
884b600f ON |
209 | spin_unlock_irqrestore(&acm->write_lock, flags); |
210 | return -ENODEV; | |
211 | } | |
212 | ||
11ea859d ON |
213 | dbg("%s susp_count: %d", __func__, acm->susp_count); |
214 | if (acm->susp_count) { | |
11ea859d | 215 | acm->delayed_wb = wb; |
11ea859d ON |
216 | schedule_work(&acm->waker); |
217 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
218 | return 0; /* A white lie */ | |
219 | } | |
220 | usb_mark_last_busy(acm->dev); | |
221 | ||
11ea859d | 222 | rc = acm_start_wb(acm, wb); |
884b600f ON |
223 | spin_unlock_irqrestore(&acm->write_lock, flags); |
224 | ||
884b600f | 225 | return rc; |
11ea859d | 226 | |
884b600f | 227 | } |
c4cabd28 ON |
228 | /* |
229 | * attributes exported through sysfs | |
230 | */ | |
231 | static ssize_t show_caps | |
232 | (struct device *dev, struct device_attribute *attr, char *buf) | |
233 | { | |
234 | struct usb_interface *intf = to_usb_interface(dev); | |
235 | struct acm *acm = usb_get_intfdata(intf); | |
236 | ||
237 | return sprintf(buf, "%d", acm->ctrl_caps); | |
238 | } | |
239 | static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL); | |
240 | ||
241 | static ssize_t show_country_codes | |
242 | (struct device *dev, struct device_attribute *attr, char *buf) | |
243 | { | |
244 | struct usb_interface *intf = to_usb_interface(dev); | |
245 | struct acm *acm = usb_get_intfdata(intf); | |
246 | ||
247 | memcpy(buf, acm->country_codes, acm->country_code_size); | |
248 | return acm->country_code_size; | |
249 | } | |
250 | ||
251 | static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL); | |
252 | ||
253 | static ssize_t show_country_rel_date | |
254 | (struct device *dev, struct device_attribute *attr, char *buf) | |
255 | { | |
256 | struct usb_interface *intf = to_usb_interface(dev); | |
257 | struct acm *acm = usb_get_intfdata(intf); | |
258 | ||
259 | return sprintf(buf, "%d", acm->country_rel_date); | |
260 | } | |
884b600f | 261 | |
c4cabd28 | 262 | static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL); |
1da177e4 LT |
263 | /* |
264 | * Interrupt handlers for various ACM device responses | |
265 | */ | |
266 | ||
267 | /* control interface reports status changes with "interrupt" transfers */ | |
7d12e780 | 268 | static void acm_ctrl_irq(struct urb *urb) |
1da177e4 LT |
269 | { |
270 | struct acm *acm = urb->context; | |
271 | struct usb_cdc_notification *dr = urb->transfer_buffer; | |
10077d4a | 272 | struct tty_struct *tty; |
1da177e4 LT |
273 | unsigned char *data; |
274 | int newctrl; | |
185d4058 GKH |
275 | int retval; |
276 | int status = urb->status; | |
1da177e4 | 277 | |
185d4058 | 278 | switch (status) { |
1da177e4 LT |
279 | case 0: |
280 | /* success */ | |
281 | break; | |
282 | case -ECONNRESET: | |
283 | case -ENOENT: | |
284 | case -ESHUTDOWN: | |
285 | /* this urb is terminated, clean up */ | |
441b62c1 | 286 | dbg("%s - urb shutting down with status: %d", __func__, status); |
1da177e4 LT |
287 | return; |
288 | default: | |
441b62c1 | 289 | dbg("%s - nonzero urb status received: %d", __func__, status); |
1da177e4 LT |
290 | goto exit; |
291 | } | |
292 | ||
293 | if (!ACM_READY(acm)) | |
294 | goto exit; | |
295 | ||
296 | data = (unsigned char *)(dr + 1); | |
297 | switch (dr->bNotificationType) { | |
6e47e069 AC |
298 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: |
299 | dbg("%s network", dr->wValue ? | |
300 | "connected to" : "disconnected from"); | |
301 | break; | |
1da177e4 | 302 | |
6e47e069 AC |
303 | case USB_CDC_NOTIFY_SERIAL_STATE: |
304 | tty = tty_port_tty_get(&acm->port); | |
305 | newctrl = get_unaligned_le16(data); | |
1da177e4 | 306 | |
6e47e069 AC |
307 | if (tty) { |
308 | if (!acm->clocal && | |
309 | (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { | |
310 | dbg("calling hangup"); | |
311 | tty_hangup(tty); | |
1da177e4 | 312 | } |
6e47e069 AC |
313 | tty_kref_put(tty); |
314 | } | |
1da177e4 | 315 | |
6e47e069 | 316 | acm->ctrlin = newctrl; |
1da177e4 | 317 | |
6e47e069 AC |
318 | dbg("input control lines: dcd%c dsr%c break%c ring%c framing%c parity%c overrun%c", |
319 | acm->ctrlin & ACM_CTRL_DCD ? '+' : '-', | |
320 | acm->ctrlin & ACM_CTRL_DSR ? '+' : '-', | |
321 | acm->ctrlin & ACM_CTRL_BRK ? '+' : '-', | |
322 | acm->ctrlin & ACM_CTRL_RI ? '+' : '-', | |
323 | acm->ctrlin & ACM_CTRL_FRAMING ? '+' : '-', | |
324 | acm->ctrlin & ACM_CTRL_PARITY ? '+' : '-', | |
325 | acm->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-'); | |
1da177e4 LT |
326 | break; |
327 | ||
6e47e069 AC |
328 | default: |
329 | dbg("unknown notification %d received: index %d len %d data0 %d data1 %d", | |
330 | dr->bNotificationType, dr->wIndex, | |
331 | dr->wLength, data[0], data[1]); | |
332 | break; | |
1da177e4 LT |
333 | } |
334 | exit: | |
11ea859d | 335 | usb_mark_last_busy(acm->dev); |
6e47e069 | 336 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
185d4058 | 337 | if (retval) |
9908a32e GKH |
338 | dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with " |
339 | "result %d", __func__, retval); | |
1da177e4 LT |
340 | } |
341 | ||
342 | /* data interface returns incoming bytes, or we got unthrottled */ | |
7d12e780 | 343 | static void acm_read_bulk(struct urb *urb) |
1da177e4 | 344 | { |
61a87adf DK |
345 | struct acm_rb *buf; |
346 | struct acm_ru *rcv = urb->context; | |
347 | struct acm *acm = rcv->instance; | |
86478944 | 348 | int status = urb->status; |
185d4058 GKH |
349 | |
350 | dbg("Entering acm_read_bulk with status %d", status); | |
1da177e4 | 351 | |
11ea859d ON |
352 | if (!ACM_READY(acm)) { |
353 | dev_dbg(&acm->data->dev, "Aborting, acm not ready"); | |
1da177e4 | 354 | return; |
11ea859d ON |
355 | } |
356 | usb_mark_last_busy(acm->dev); | |
1da177e4 | 357 | |
86478944 | 358 | if (status) |
898eb71c | 359 | dev_dbg(&acm->data->dev, "bulk rx status %d\n", status); |
1da177e4 | 360 | |
61a87adf DK |
361 | buf = rcv->buffer; |
362 | buf->size = urb->actual_length; | |
363 | ||
86478944 ON |
364 | if (likely(status == 0)) { |
365 | spin_lock(&acm->read_lock); | |
11ea859d | 366 | acm->processing++; |
86478944 ON |
367 | list_add_tail(&rcv->list, &acm->spare_read_urbs); |
368 | list_add_tail(&buf->list, &acm->filled_read_bufs); | |
369 | spin_unlock(&acm->read_lock); | |
370 | } else { | |
371 | /* we drop the buffer due to an error */ | |
372 | spin_lock(&acm->read_lock); | |
373 | list_add_tail(&rcv->list, &acm->spare_read_urbs); | |
374 | list_add(&buf->list, &acm->spare_read_bufs); | |
375 | spin_unlock(&acm->read_lock); | |
376 | /* nevertheless the tasklet must be kicked unconditionally | |
377 | so the queue cannot dry up */ | |
378 | } | |
11ea859d ON |
379 | if (likely(!acm->susp_count)) |
380 | tasklet_schedule(&acm->urb_task); | |
1da177e4 LT |
381 | } |
382 | ||
383 | static void acm_rx_tasklet(unsigned long _acm) | |
384 | { | |
385 | struct acm *acm = (void *)_acm; | |
61a87adf | 386 | struct acm_rb *buf; |
10077d4a | 387 | struct tty_struct *tty; |
61a87adf | 388 | struct acm_ru *rcv; |
762f007b | 389 | unsigned long flags; |
ca79b7b4 | 390 | unsigned char throttled; |
11ea859d | 391 | |
1da177e4 LT |
392 | dbg("Entering acm_rx_tasklet"); |
393 | ||
10077d4a | 394 | if (!ACM_READY(acm)) { |
11ea859d | 395 | dbg("acm_rx_tasklet: ACM not ready"); |
ca79b7b4 | 396 | return; |
11ea859d | 397 | } |
ca79b7b4 | 398 | |
834dbca5 | 399 | spin_lock_irqsave(&acm->throttle_lock, flags); |
ca79b7b4 | 400 | throttled = acm->throttle; |
834dbca5 | 401 | spin_unlock_irqrestore(&acm->throttle_lock, flags); |
10077d4a | 402 | if (throttled) { |
11ea859d | 403 | dbg("acm_rx_tasklet: throttled"); |
61a87adf | 404 | return; |
11ea859d | 405 | } |
61a87adf | 406 | |
10077d4a AC |
407 | tty = tty_port_tty_get(&acm->port); |
408 | ||
61a87adf | 409 | next_buffer: |
762f007b | 410 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 411 | if (list_empty(&acm->filled_read_bufs)) { |
762f007b | 412 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf | 413 | goto urbs; |
1da177e4 | 414 | } |
61a87adf DK |
415 | buf = list_entry(acm->filled_read_bufs.next, |
416 | struct acm_rb, list); | |
417 | list_del(&buf->list); | |
762f007b | 418 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf | 419 | |
3dd2ae81 | 420 | dbg("acm_rx_tasklet: procesing buf 0x%p, size = %d", buf, buf->size); |
61a87adf | 421 | |
10077d4a AC |
422 | if (tty) { |
423 | spin_lock_irqsave(&acm->throttle_lock, flags); | |
424 | throttled = acm->throttle; | |
425 | spin_unlock_irqrestore(&acm->throttle_lock, flags); | |
426 | if (!throttled) { | |
427 | tty_buffer_request_room(tty, buf->size); | |
428 | tty_insert_flip_string(tty, buf->base, buf->size); | |
429 | tty_flip_buffer_push(tty); | |
430 | } else { | |
431 | tty_kref_put(tty); | |
432 | dbg("Throttling noticed"); | |
433 | spin_lock_irqsave(&acm->read_lock, flags); | |
434 | list_add(&buf->list, &acm->filled_read_bufs); | |
435 | spin_unlock_irqrestore(&acm->read_lock, flags); | |
436 | return; | |
437 | } | |
1da177e4 | 438 | } |
1da177e4 | 439 | |
762f007b | 440 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 441 | list_add(&buf->list, &acm->spare_read_bufs); |
762f007b | 442 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf DK |
443 | goto next_buffer; |
444 | ||
445 | urbs: | |
10077d4a AC |
446 | tty_kref_put(tty); |
447 | ||
61a87adf | 448 | while (!list_empty(&acm->spare_read_bufs)) { |
762f007b | 449 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 450 | if (list_empty(&acm->spare_read_urbs)) { |
11ea859d | 451 | acm->processing = 0; |
762f007b | 452 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf DK |
453 | return; |
454 | } | |
455 | rcv = list_entry(acm->spare_read_urbs.next, | |
456 | struct acm_ru, list); | |
457 | list_del(&rcv->list); | |
762f007b | 458 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf DK |
459 | |
460 | buf = list_entry(acm->spare_read_bufs.next, | |
461 | struct acm_rb, list); | |
462 | list_del(&buf->list); | |
463 | ||
464 | rcv->buffer = buf; | |
465 | ||
cf7fdd57 | 466 | if (acm->is_int_ep) |
5186ffee AL |
467 | usb_fill_int_urb(rcv->urb, acm->dev, |
468 | acm->rx_endpoint, | |
469 | buf->base, | |
470 | acm->readsize, | |
cf7fdd57 | 471 | acm_read_bulk, rcv, acm->bInterval); |
5186ffee AL |
472 | else |
473 | usb_fill_bulk_urb(rcv->urb, acm->dev, | |
474 | acm->rx_endpoint, | |
475 | buf->base, | |
476 | acm->readsize, | |
477 | acm_read_bulk, rcv); | |
61a87adf DK |
478 | rcv->urb->transfer_dma = buf->dma; |
479 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
480 | ||
6e47e069 AC |
481 | /* This shouldn't kill the driver as unsuccessful URBs are |
482 | returned to the free-urbs-pool and resubmited ASAP */ | |
11ea859d | 483 | spin_lock_irqsave(&acm->read_lock, flags); |
6e47e069 AC |
484 | if (acm->susp_count || |
485 | usb_submit_urb(rcv->urb, GFP_ATOMIC) < 0) { | |
61a87adf | 486 | list_add(&buf->list, &acm->spare_read_bufs); |
61a87adf | 487 | list_add(&rcv->list, &acm->spare_read_urbs); |
11ea859d | 488 | acm->processing = 0; |
762f007b | 489 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf | 490 | return; |
11ea859d ON |
491 | } else { |
492 | spin_unlock_irqrestore(&acm->read_lock, flags); | |
493 | dbg("acm_rx_tasklet: sending urb 0x%p, rcv 0x%p, buf 0x%p", rcv->urb, rcv, buf); | |
61a87adf DK |
494 | } |
495 | } | |
11ea859d ON |
496 | spin_lock_irqsave(&acm->read_lock, flags); |
497 | acm->processing = 0; | |
498 | spin_unlock_irqrestore(&acm->read_lock, flags); | |
1da177e4 LT |
499 | } |
500 | ||
501 | /* data interface wrote those outgoing bytes */ | |
7d12e780 | 502 | static void acm_write_bulk(struct urb *urb) |
1da177e4 | 503 | { |
cdc97792 | 504 | struct acm_wb *wb = urb->context; |
e5fbab51 | 505 | struct acm *acm = wb->instance; |
ad0b65ef | 506 | unsigned long flags; |
1da177e4 | 507 | |
e5fbab51 DB |
508 | if (verbose || urb->status |
509 | || (urb->actual_length != urb->transfer_buffer_length)) | |
510 | dev_dbg(&acm->data->dev, "tx %d/%d bytes -- > %d\n", | |
511 | urb->actual_length, | |
512 | urb->transfer_buffer_length, | |
513 | urb->status); | |
1da177e4 | 514 | |
ad0b65ef | 515 | spin_lock_irqsave(&acm->write_lock, flags); |
e4cf3aa8 | 516 | acm_write_done(acm, wb); |
ad0b65ef | 517 | spin_unlock_irqrestore(&acm->write_lock, flags); |
884b600f ON |
518 | if (ACM_READY(acm)) |
519 | schedule_work(&acm->work); | |
e5fbab51 DB |
520 | else |
521 | wake_up_interruptible(&acm->drain_wait); | |
1da177e4 LT |
522 | } |
523 | ||
c4028958 | 524 | static void acm_softint(struct work_struct *work) |
1da177e4 | 525 | { |
c4028958 | 526 | struct acm *acm = container_of(work, struct acm, work); |
10077d4a | 527 | struct tty_struct *tty; |
e5fbab51 DB |
528 | |
529 | dev_vdbg(&acm->data->dev, "tx work\n"); | |
1da177e4 LT |
530 | if (!ACM_READY(acm)) |
531 | return; | |
10077d4a AC |
532 | tty = tty_port_tty_get(&acm->port); |
533 | tty_wakeup(tty); | |
534 | tty_kref_put(tty); | |
1da177e4 LT |
535 | } |
536 | ||
11ea859d ON |
537 | static void acm_waker(struct work_struct *waker) |
538 | { | |
539 | struct acm *acm = container_of(waker, struct acm, waker); | |
11ea859d ON |
540 | int rv; |
541 | ||
542 | rv = usb_autopm_get_interface(acm->control); | |
543 | if (rv < 0) { | |
9908a32e | 544 | dev_err(&acm->dev->dev, "Autopm failure in %s\n", __func__); |
11ea859d ON |
545 | return; |
546 | } | |
547 | if (acm->delayed_wb) { | |
548 | acm_start_wb(acm, acm->delayed_wb); | |
549 | acm->delayed_wb = NULL; | |
550 | } | |
11ea859d ON |
551 | usb_autopm_put_interface(acm->control); |
552 | } | |
553 | ||
1da177e4 LT |
554 | /* |
555 | * TTY handlers | |
556 | */ | |
557 | ||
558 | static int acm_tty_open(struct tty_struct *tty, struct file *filp) | |
559 | { | |
560 | struct acm *acm; | |
42dd2aa6 | 561 | int rv = -ENODEV; |
61a87adf | 562 | int i; |
3dd2ae81 | 563 | dbg("Entering acm_tty_open."); |
4186ecf8 AV |
564 | |
565 | mutex_lock(&open_mutex); | |
1da177e4 LT |
566 | |
567 | acm = acm_table[tty->index]; | |
568 | if (!acm || !acm->dev) | |
569 | goto err_out; | |
570 | else | |
571 | rv = 0; | |
572 | ||
28d1dfad | 573 | set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); |
10077d4a | 574 | |
1da177e4 | 575 | tty->driver_data = acm; |
10077d4a | 576 | tty_port_tty_set(&acm->port, tty); |
1da177e4 | 577 | |
94409cc1 ON |
578 | if (usb_autopm_get_interface(acm->control) < 0) |
579 | goto early_bail; | |
11ea859d ON |
580 | else |
581 | acm->control->needs_remote_wakeup = 1; | |
1365baf7 ON |
582 | |
583 | mutex_lock(&acm->mutex); | |
10077d4a | 584 | if (acm->port.count++) { |
1365baf7 | 585 | usb_autopm_put_interface(acm->control); |
1da177e4 | 586 | goto done; |
10077d4a | 587 | } |
1365baf7 | 588 | |
1da177e4 LT |
589 | acm->ctrlurb->dev = acm->dev; |
590 | if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) { | |
591 | dbg("usb_submit_urb(ctrl irq) failed"); | |
592 | goto bail_out; | |
593 | } | |
594 | ||
ca79b7b4 ON |
595 | if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) && |
596 | (acm->ctrl_caps & USB_CDC_CAP_LINE)) | |
1da177e4 | 597 | goto full_bailout; |
10077d4a | 598 | |
11ea859d | 599 | usb_autopm_put_interface(acm->control); |
1da177e4 | 600 | |
61a87adf DK |
601 | INIT_LIST_HEAD(&acm->spare_read_urbs); |
602 | INIT_LIST_HEAD(&acm->spare_read_bufs); | |
603 | INIT_LIST_HEAD(&acm->filled_read_bufs); | |
6e47e069 AC |
604 | |
605 | for (i = 0; i < acm->rx_buflimit; i++) | |
61a87adf | 606 | list_add(&(acm->ru[i].list), &acm->spare_read_urbs); |
6e47e069 | 607 | for (i = 0; i < acm->rx_buflimit; i++) |
61a87adf | 608 | list_add(&(acm->rb[i].list), &acm->spare_read_bufs); |
61a87adf | 609 | |
ca79b7b4 ON |
610 | acm->throttle = 0; |
611 | ||
61a87adf | 612 | tasklet_schedule(&acm->urb_task); |
7af25b4b | 613 | set_bit(ASYNCB_INITIALIZED, &acm->port.flags); |
10077d4a | 614 | rv = tty_port_block_til_ready(&acm->port, tty, filp); |
1da177e4 | 615 | done: |
1365baf7 | 616 | mutex_unlock(&acm->mutex); |
74573ee7 | 617 | err_out: |
94409cc1 | 618 | mutex_unlock(&open_mutex); |
1da177e4 LT |
619 | return rv; |
620 | ||
621 | full_bailout: | |
1da177e4 LT |
622 | usb_kill_urb(acm->ctrlurb); |
623 | bail_out: | |
1365baf7 | 624 | usb_autopm_put_interface(acm->control); |
10077d4a | 625 | acm->port.count--; |
1365baf7 | 626 | mutex_unlock(&acm->mutex); |
94409cc1 ON |
627 | early_bail: |
628 | mutex_unlock(&open_mutex); | |
10077d4a | 629 | tty_port_tty_set(&acm->port, NULL); |
1da177e4 LT |
630 | return -EIO; |
631 | } | |
632 | ||
83ef344a | 633 | static void acm_tty_unregister(struct acm *acm) |
634 | { | |
10077d4a | 635 | int i, nr; |
61a87adf | 636 | |
86478944 | 637 | nr = acm->rx_buflimit; |
83ef344a | 638 | tty_unregister_device(acm_tty_driver, acm->minor); |
639 | usb_put_intf(acm->control); | |
640 | acm_table[acm->minor] = NULL; | |
641 | usb_free_urb(acm->ctrlurb); | |
e4cf3aa8 DE |
642 | for (i = 0; i < ACM_NW; i++) |
643 | usb_free_urb(acm->wb[i].urb); | |
86478944 | 644 | for (i = 0; i < nr; i++) |
61a87adf | 645 | usb_free_urb(acm->ru[i].urb); |
c4cabd28 | 646 | kfree(acm->country_codes); |
83ef344a | 647 | kfree(acm); |
648 | } | |
649 | ||
e5fbab51 DB |
650 | static int acm_tty_chars_in_buffer(struct tty_struct *tty); |
651 | ||
10077d4a AC |
652 | static void acm_port_down(struct acm *acm, int drain) |
653 | { | |
654 | int i, nr = acm->rx_buflimit; | |
655 | mutex_lock(&open_mutex); | |
656 | if (acm->dev) { | |
657 | usb_autopm_get_interface(acm->control); | |
658 | acm_set_control(acm, acm->ctrlout = 0); | |
659 | /* try letting the last writes drain naturally */ | |
660 | if (drain) { | |
661 | wait_event_interruptible_timeout(acm->drain_wait, | |
662 | (ACM_NW == acm_wb_is_avail(acm)) || !acm->dev, | |
663 | ACM_CLOSE_TIMEOUT * HZ); | |
664 | } | |
665 | usb_kill_urb(acm->ctrlurb); | |
666 | for (i = 0; i < ACM_NW; i++) | |
667 | usb_kill_urb(acm->wb[i].urb); | |
668 | for (i = 0; i < nr; i++) | |
669 | usb_kill_urb(acm->ru[i].urb); | |
670 | acm->control->needs_remote_wakeup = 0; | |
671 | usb_autopm_put_interface(acm->control); | |
672 | } | |
673 | mutex_unlock(&open_mutex); | |
674 | } | |
675 | ||
676 | static void acm_tty_hangup(struct tty_struct *tty) | |
677 | { | |
678 | struct acm *acm = tty->driver_data; | |
679 | tty_port_hangup(&acm->port); | |
680 | acm_port_down(acm, 0); | |
681 | } | |
682 | ||
1da177e4 LT |
683 | static void acm_tty_close(struct tty_struct *tty, struct file *filp) |
684 | { | |
685 | struct acm *acm = tty->driver_data; | |
686 | ||
10077d4a AC |
687 | /* Perform the closing process and see if we need to do the hardware |
688 | shutdown */ | |
922b1356 | 689 | if (!acm || tty_port_close_start(&acm->port, tty, filp) == 0) |
1da177e4 | 690 | return; |
10077d4a AC |
691 | acm_port_down(acm, 0); |
692 | tty_port_close_end(&acm->port, tty); | |
4186ecf8 | 693 | mutex_lock(&open_mutex); |
10077d4a AC |
694 | tty_port_tty_set(&acm->port, NULL); |
695 | if (!acm->dev) | |
696 | acm_tty_unregister(acm); | |
4186ecf8 | 697 | mutex_unlock(&open_mutex); |
1da177e4 LT |
698 | } |
699 | ||
6e47e069 AC |
700 | static int acm_tty_write(struct tty_struct *tty, |
701 | const unsigned char *buf, int count) | |
1da177e4 LT |
702 | { |
703 | struct acm *acm = tty->driver_data; | |
704 | int stat; | |
884b600f ON |
705 | unsigned long flags; |
706 | int wbn; | |
707 | struct acm_wb *wb; | |
708 | ||
3dd2ae81 | 709 | dbg("Entering acm_tty_write to write %d bytes,", count); |
1da177e4 LT |
710 | |
711 | if (!ACM_READY(acm)) | |
712 | return -EINVAL; | |
1da177e4 LT |
713 | if (!count) |
714 | return 0; | |
715 | ||
884b600f | 716 | spin_lock_irqsave(&acm->write_lock, flags); |
6e47e069 AC |
717 | wbn = acm_wb_alloc(acm); |
718 | if (wbn < 0) { | |
884b600f | 719 | spin_unlock_irqrestore(&acm->write_lock, flags); |
884b600f ON |
720 | return 0; |
721 | } | |
722 | wb = &acm->wb[wbn]; | |
1da177e4 | 723 | |
884b600f | 724 | count = (count > acm->writesize) ? acm->writesize : count; |
1da177e4 | 725 | dbg("Get %d bytes...", count); |
884b600f ON |
726 | memcpy(wb->buf, buf, count); |
727 | wb->len = count; | |
728 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
1da177e4 | 729 | |
6e47e069 AC |
730 | stat = acm_write_start(acm, wbn); |
731 | if (stat < 0) | |
1da177e4 | 732 | return stat; |
1da177e4 LT |
733 | return count; |
734 | } | |
735 | ||
736 | static int acm_tty_write_room(struct tty_struct *tty) | |
737 | { | |
738 | struct acm *acm = tty->driver_data; | |
739 | if (!ACM_READY(acm)) | |
740 | return -EINVAL; | |
884b600f ON |
741 | /* |
742 | * Do not let the line discipline to know that we have a reserve, | |
743 | * or it might get too enthusiastic. | |
744 | */ | |
934da463 | 745 | return acm_wb_is_avail(acm) ? acm->writesize : 0; |
1da177e4 LT |
746 | } |
747 | ||
748 | static int acm_tty_chars_in_buffer(struct tty_struct *tty) | |
749 | { | |
750 | struct acm *acm = tty->driver_data; | |
751 | if (!ACM_READY(acm)) | |
23198fda | 752 | return 0; |
884b600f ON |
753 | /* |
754 | * This is inaccurate (overcounts), but it works. | |
755 | */ | |
86478944 | 756 | return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; |
1da177e4 LT |
757 | } |
758 | ||
759 | static void acm_tty_throttle(struct tty_struct *tty) | |
760 | { | |
761 | struct acm *acm = tty->driver_data; | |
762 | if (!ACM_READY(acm)) | |
763 | return; | |
764 | spin_lock_bh(&acm->throttle_lock); | |
765 | acm->throttle = 1; | |
766 | spin_unlock_bh(&acm->throttle_lock); | |
767 | } | |
768 | ||
769 | static void acm_tty_unthrottle(struct tty_struct *tty) | |
770 | { | |
771 | struct acm *acm = tty->driver_data; | |
772 | if (!ACM_READY(acm)) | |
773 | return; | |
774 | spin_lock_bh(&acm->throttle_lock); | |
775 | acm->throttle = 0; | |
776 | spin_unlock_bh(&acm->throttle_lock); | |
61a87adf | 777 | tasklet_schedule(&acm->urb_task); |
1da177e4 LT |
778 | } |
779 | ||
9e98966c | 780 | static int acm_tty_break_ctl(struct tty_struct *tty, int state) |
1da177e4 LT |
781 | { |
782 | struct acm *acm = tty->driver_data; | |
9e98966c | 783 | int retval; |
1da177e4 | 784 | if (!ACM_READY(acm)) |
9e98966c AC |
785 | return -EINVAL; |
786 | retval = acm_send_break(acm, state ? 0xffff : 0); | |
787 | if (retval < 0) | |
1da177e4 | 788 | dbg("send break failed"); |
9e98966c | 789 | return retval; |
1da177e4 LT |
790 | } |
791 | ||
792 | static int acm_tty_tiocmget(struct tty_struct *tty, struct file *file) | |
793 | { | |
794 | struct acm *acm = tty->driver_data; | |
795 | ||
796 | if (!ACM_READY(acm)) | |
797 | return -EINVAL; | |
798 | ||
799 | return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | | |
800 | (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | | |
801 | (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | | |
802 | (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | | |
803 | (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | | |
804 | TIOCM_CTS; | |
805 | } | |
806 | ||
807 | static int acm_tty_tiocmset(struct tty_struct *tty, struct file *file, | |
808 | unsigned int set, unsigned int clear) | |
809 | { | |
810 | struct acm *acm = tty->driver_data; | |
811 | unsigned int newctrl; | |
812 | ||
813 | if (!ACM_READY(acm)) | |
814 | return -EINVAL; | |
815 | ||
816 | newctrl = acm->ctrlout; | |
6e47e069 AC |
817 | set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | |
818 | (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); | |
819 | clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | | |
820 | (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); | |
1da177e4 LT |
821 | |
822 | newctrl = (newctrl & ~clear) | set; | |
823 | ||
824 | if (acm->ctrlout == newctrl) | |
825 | return 0; | |
826 | return acm_set_control(acm, acm->ctrlout = newctrl); | |
827 | } | |
828 | ||
6e47e069 AC |
829 | static int acm_tty_ioctl(struct tty_struct *tty, struct file *file, |
830 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
831 | { |
832 | struct acm *acm = tty->driver_data; | |
833 | ||
834 | if (!ACM_READY(acm)) | |
835 | return -EINVAL; | |
836 | ||
837 | return -ENOIOCTLCMD; | |
838 | } | |
839 | ||
4c4c9432 | 840 | static const __u32 acm_tty_speed[] = { |
1da177e4 LT |
841 | 0, 50, 75, 110, 134, 150, 200, 300, 600, |
842 | 1200, 1800, 2400, 4800, 9600, 19200, 38400, | |
843 | 57600, 115200, 230400, 460800, 500000, 576000, | |
844 | 921600, 1000000, 1152000, 1500000, 2000000, | |
845 | 2500000, 3000000, 3500000, 4000000 | |
846 | }; | |
847 | ||
4c4c9432 | 848 | static const __u8 acm_tty_size[] = { |
1da177e4 LT |
849 | 5, 6, 7, 8 |
850 | }; | |
851 | ||
6e47e069 AC |
852 | static void acm_tty_set_termios(struct tty_struct *tty, |
853 | struct ktermios *termios_old) | |
1da177e4 LT |
854 | { |
855 | struct acm *acm = tty->driver_data; | |
606d099c | 856 | struct ktermios *termios = tty->termios; |
1da177e4 LT |
857 | struct usb_cdc_line_coding newline; |
858 | int newctrl = acm->ctrlout; | |
859 | ||
860 | if (!ACM_READY(acm)) | |
861 | return; | |
862 | ||
9b80fee1 | 863 | newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); |
1da177e4 LT |
864 | newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; |
865 | newline.bParityType = termios->c_cflag & PARENB ? | |
6e47e069 AC |
866 | (termios->c_cflag & PARODD ? 1 : 2) + |
867 | (termios->c_cflag & CMSPAR ? 2 : 0) : 0; | |
1da177e4 | 868 | newline.bDataBits = acm_tty_size[(termios->c_cflag & CSIZE) >> 4]; |
6e47e069 | 869 | /* FIXME: Needs to clear unsupported bits in the termios */ |
1da177e4 LT |
870 | acm->clocal = ((termios->c_cflag & CLOCAL) != 0); |
871 | ||
872 | if (!newline.dwDTERate) { | |
873 | newline.dwDTERate = acm->line.dwDTERate; | |
874 | newctrl &= ~ACM_CTRL_DTR; | |
6e47e069 AC |
875 | } else |
876 | newctrl |= ACM_CTRL_DTR; | |
1da177e4 LT |
877 | |
878 | if (newctrl != acm->ctrlout) | |
879 | acm_set_control(acm, acm->ctrlout = newctrl); | |
880 | ||
881 | if (memcmp(&acm->line, &newline, sizeof newline)) { | |
882 | memcpy(&acm->line, &newline, sizeof newline); | |
883 | dbg("set line: %d %d %d %d", le32_to_cpu(newline.dwDTERate), | |
884 | newline.bCharFormat, newline.bParityType, | |
885 | newline.bDataBits); | |
886 | acm_set_line(acm, &acm->line); | |
887 | } | |
888 | } | |
889 | ||
890 | /* | |
891 | * USB probe and disconnect routines. | |
892 | */ | |
893 | ||
830f4021 | 894 | /* Little helpers: write/read buffers free */ |
884b600f ON |
895 | static void acm_write_buffers_free(struct acm *acm) |
896 | { | |
897 | int i; | |
898 | struct acm_wb *wb; | |
a496c64f | 899 | struct usb_device *usb_dev = interface_to_usbdev(acm->control); |
884b600f | 900 | |
6e47e069 | 901 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) |
a496c64f | 902 | usb_buffer_free(usb_dev, acm->writesize, wb->buf, wb->dmah); |
884b600f ON |
903 | } |
904 | ||
830f4021 ON |
905 | static void acm_read_buffers_free(struct acm *acm) |
906 | { | |
907 | struct usb_device *usb_dev = interface_to_usbdev(acm->control); | |
908 | int i, n = acm->rx_buflimit; | |
909 | ||
910 | for (i = 0; i < n; i++) | |
6e47e069 AC |
911 | usb_buffer_free(usb_dev, acm->readsize, |
912 | acm->rb[i].base, acm->rb[i].dma); | |
830f4021 ON |
913 | } |
914 | ||
884b600f ON |
915 | /* Little helper: write buffers allocate */ |
916 | static int acm_write_buffers_alloc(struct acm *acm) | |
917 | { | |
918 | int i; | |
919 | struct acm_wb *wb; | |
920 | ||
86478944 | 921 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { |
884b600f ON |
922 | wb->buf = usb_buffer_alloc(acm->dev, acm->writesize, GFP_KERNEL, |
923 | &wb->dmah); | |
924 | if (!wb->buf) { | |
925 | while (i != 0) { | |
926 | --i; | |
927 | --wb; | |
928 | usb_buffer_free(acm->dev, acm->writesize, | |
929 | wb->buf, wb->dmah); | |
930 | } | |
931 | return -ENOMEM; | |
932 | } | |
933 | } | |
934 | return 0; | |
935 | } | |
936 | ||
10077d4a AC |
937 | static int acm_probe(struct usb_interface *intf, |
938 | const struct usb_device_id *id) | |
1da177e4 LT |
939 | { |
940 | struct usb_cdc_union_desc *union_header = NULL; | |
c4cabd28 | 941 | struct usb_cdc_country_functional_desc *cfd = NULL; |
c6dbf554 | 942 | unsigned char *buffer = intf->altsetting->extra; |
1da177e4 LT |
943 | int buflen = intf->altsetting->extralen; |
944 | struct usb_interface *control_interface; | |
945 | struct usb_interface *data_interface; | |
a2bfb4a3 ON |
946 | struct usb_endpoint_descriptor *epctrl = NULL; |
947 | struct usb_endpoint_descriptor *epread = NULL; | |
948 | struct usb_endpoint_descriptor *epwrite = NULL; | |
1da177e4 LT |
949 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
950 | struct acm *acm; | |
951 | int minor; | |
6e47e069 | 952 | int ctrlsize, readsize; |
1da177e4 LT |
953 | u8 *buf; |
954 | u8 ac_management_function = 0; | |
955 | u8 call_management_function = 0; | |
956 | int call_interface_num = -1; | |
957 | int data_interface_num; | |
958 | unsigned long quirks; | |
86478944 | 959 | int num_rx_buf; |
61a87adf | 960 | int i; |
a2bfb4a3 | 961 | int combined_interfaces = 0; |
1da177e4 | 962 | |
86478944 | 963 | /* normal quirks */ |
1da177e4 | 964 | quirks = (unsigned long)id->driver_info; |
86478944 ON |
965 | num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; |
966 | ||
967 | /* handle quirks deadly to normal probing*/ | |
1da177e4 LT |
968 | if (quirks == NO_UNION_NORMAL) { |
969 | data_interface = usb_ifnum_to_if(usb_dev, 1); | |
970 | control_interface = usb_ifnum_to_if(usb_dev, 0); | |
971 | goto skip_normal_probe; | |
972 | } | |
6e47e069 | 973 | |
1da177e4 LT |
974 | /* normal probing*/ |
975 | if (!buffer) { | |
9908a32e | 976 | dev_err(&intf->dev, "Weird descriptor references\n"); |
1da177e4 LT |
977 | return -EINVAL; |
978 | } | |
979 | ||
980 | if (!buflen) { | |
6e47e069 AC |
981 | if (intf->cur_altsetting->endpoint->extralen && |
982 | intf->cur_altsetting->endpoint->extra) { | |
983 | dev_dbg(&intf->dev, | |
984 | "Seeking extra descriptors on endpoint\n"); | |
1da177e4 LT |
985 | buflen = intf->cur_altsetting->endpoint->extralen; |
986 | buffer = intf->cur_altsetting->endpoint->extra; | |
987 | } else { | |
9908a32e GKH |
988 | dev_err(&intf->dev, |
989 | "Zero length descriptor references\n"); | |
1da177e4 LT |
990 | return -EINVAL; |
991 | } | |
992 | } | |
993 | ||
994 | while (buflen > 0) { | |
6e47e069 | 995 | if (buffer[1] != USB_DT_CS_INTERFACE) { |
9908a32e | 996 | dev_err(&intf->dev, "skipping garbage\n"); |
1da177e4 LT |
997 | goto next_desc; |
998 | } | |
999 | ||
6e47e069 AC |
1000 | switch (buffer[2]) { |
1001 | case USB_CDC_UNION_TYPE: /* we've found it */ | |
1002 | if (union_header) { | |
1003 | dev_err(&intf->dev, "More than one " | |
1004 | "union descriptor, skipping ...\n"); | |
1005 | goto next_desc; | |
1da177e4 | 1006 | } |
6e47e069 AC |
1007 | union_header = (struct usb_cdc_union_desc *)buffer; |
1008 | break; | |
1009 | case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ | |
1010 | cfd = (struct usb_cdc_country_functional_desc *)buffer; | |
1011 | break; | |
1012 | case USB_CDC_HEADER_TYPE: /* maybe check version */ | |
1013 | break; /* for now we ignore it */ | |
1014 | case USB_CDC_ACM_TYPE: | |
1015 | ac_management_function = buffer[3]; | |
1016 | break; | |
1017 | case USB_CDC_CALL_MANAGEMENT_TYPE: | |
1018 | call_management_function = buffer[3]; | |
1019 | call_interface_num = buffer[4]; | |
1020 | if ((call_management_function & 3) != 3) | |
1021 | dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n"); | |
1022 | break; | |
1023 | default: | |
1024 | /* there are LOTS more CDC descriptors that | |
1025 | * could legitimately be found here. | |
1026 | */ | |
1027 | dev_dbg(&intf->dev, "Ignoring descriptor: " | |
1028 | "type %02x, length %d\n", | |
1029 | buffer[2], buffer[0]); | |
1030 | break; | |
1031 | } | |
1da177e4 LT |
1032 | next_desc: |
1033 | buflen -= buffer[0]; | |
1034 | buffer += buffer[0]; | |
1035 | } | |
1036 | ||
1037 | if (!union_header) { | |
1038 | if (call_interface_num > 0) { | |
6e47e069 | 1039 | dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); |
1da177e4 LT |
1040 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); |
1041 | control_interface = intf; | |
1042 | } else { | |
a2bfb4a3 ON |
1043 | if (intf->cur_altsetting->desc.bNumEndpoints != 3) { |
1044 | dev_dbg(&intf->dev,"No union descriptor, giving up\n"); | |
1045 | return -ENODEV; | |
1046 | } else { | |
1047 | dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); | |
1048 | combined_interfaces = 1; | |
1049 | control_interface = data_interface = intf; | |
1050 | goto look_for_collapsed_interface; | |
1051 | } | |
1da177e4 LT |
1052 | } |
1053 | } else { | |
1054 | control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); | |
1055 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); | |
1056 | if (!control_interface || !data_interface) { | |
6e47e069 | 1057 | dev_dbg(&intf->dev, "no interfaces\n"); |
1da177e4 LT |
1058 | return -ENODEV; |
1059 | } | |
1060 | } | |
6e47e069 | 1061 | |
1da177e4 | 1062 | if (data_interface_num != call_interface_num) |
6e47e069 | 1063 | dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); |
1da177e4 | 1064 | |
a2bfb4a3 ON |
1065 | if (control_interface == data_interface) { |
1066 | /* some broken devices designed for windows work this way */ | |
1067 | dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); | |
1068 | combined_interfaces = 1; | |
1069 | /* a popular other OS doesn't use it */ | |
1070 | quirks |= NO_CAP_LINE; | |
1071 | if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { | |
1072 | dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); | |
1073 | return -EINVAL; | |
1074 | } | |
1075 | look_for_collapsed_interface: | |
1076 | for (i = 0; i < 3; i++) { | |
1077 | struct usb_endpoint_descriptor *ep; | |
1078 | ep = &data_interface->cur_altsetting->endpoint[i].desc; | |
1079 | ||
1080 | if (usb_endpoint_is_int_in(ep)) | |
1081 | epctrl = ep; | |
1082 | else if (usb_endpoint_is_bulk_out(ep)) | |
1083 | epwrite = ep; | |
1084 | else if (usb_endpoint_is_bulk_in(ep)) | |
1085 | epread = ep; | |
1086 | else | |
1087 | return -EINVAL; | |
1088 | } | |
1089 | if (!epctrl || !epread || !epwrite) | |
1090 | return -ENODEV; | |
1091 | else | |
1092 | goto made_compressed_probe; | |
1093 | } | |
1094 | ||
1da177e4 LT |
1095 | skip_normal_probe: |
1096 | ||
1097 | /*workaround for switched interfaces */ | |
6e47e069 AC |
1098 | if (data_interface->cur_altsetting->desc.bInterfaceClass |
1099 | != CDC_DATA_INTERFACE_TYPE) { | |
1100 | if (control_interface->cur_altsetting->desc.bInterfaceClass | |
1101 | == CDC_DATA_INTERFACE_TYPE) { | |
1da177e4 | 1102 | struct usb_interface *t; |
6e47e069 AC |
1103 | dev_dbg(&intf->dev, |
1104 | "Your device has switched interfaces.\n"); | |
1da177e4 LT |
1105 | t = control_interface; |
1106 | control_interface = data_interface; | |
1107 | data_interface = t; | |
1108 | } else { | |
1109 | return -EINVAL; | |
1110 | } | |
1111 | } | |
74da5d68 AS |
1112 | |
1113 | /* Accept probe requests only for the control interface */ | |
a2bfb4a3 | 1114 | if (!combined_interfaces && intf != control_interface) |
74da5d68 | 1115 | return -ENODEV; |
6e47e069 | 1116 | |
a2bfb4a3 ON |
1117 | if (!combined_interfaces && usb_interface_claimed(data_interface)) { |
1118 | /* valid in this context */ | |
6e47e069 | 1119 | dev_dbg(&intf->dev, "The data interface isn't available\n"); |
1da177e4 LT |
1120 | return -EBUSY; |
1121 | } | |
1122 | ||
1123 | ||
1124 | if (data_interface->cur_altsetting->desc.bNumEndpoints < 2) | |
1125 | return -EINVAL; | |
1126 | ||
1127 | epctrl = &control_interface->cur_altsetting->endpoint[0].desc; | |
1128 | epread = &data_interface->cur_altsetting->endpoint[0].desc; | |
1129 | epwrite = &data_interface->cur_altsetting->endpoint[1].desc; | |
1130 | ||
1131 | ||
1132 | /* workaround for switched endpoints */ | |
45aea704 | 1133 | if (!usb_endpoint_dir_in(epread)) { |
1da177e4 LT |
1134 | /* descriptors are swapped */ |
1135 | struct usb_endpoint_descriptor *t; | |
6e47e069 AC |
1136 | dev_dbg(&intf->dev, |
1137 | "The data interface has switched endpoints\n"); | |
1da177e4 LT |
1138 | t = epread; |
1139 | epread = epwrite; | |
1140 | epwrite = t; | |
1141 | } | |
a2bfb4a3 | 1142 | made_compressed_probe: |
1da177e4 LT |
1143 | dbg("interfaces are valid"); |
1144 | for (minor = 0; minor < ACM_TTY_MINORS && acm_table[minor]; minor++); | |
1145 | ||
1146 | if (minor == ACM_TTY_MINORS) { | |
9908a32e | 1147 | dev_err(&intf->dev, "no more free acm devices\n"); |
1da177e4 LT |
1148 | return -ENODEV; |
1149 | } | |
1150 | ||
6e47e069 AC |
1151 | acm = kzalloc(sizeof(struct acm), GFP_KERNEL); |
1152 | if (acm == NULL) { | |
898eb71c | 1153 | dev_dbg(&intf->dev, "out of memory (acm kzalloc)\n"); |
1da177e4 LT |
1154 | goto alloc_fail; |
1155 | } | |
1da177e4 LT |
1156 | |
1157 | ctrlsize = le16_to_cpu(epctrl->wMaxPacketSize); | |
6e47e069 AC |
1158 | readsize = le16_to_cpu(epread->wMaxPacketSize) * |
1159 | (quirks == SINGLE_RX_URB ? 1 : 2); | |
a2bfb4a3 | 1160 | acm->combined_interfaces = combined_interfaces; |
e4cf3aa8 | 1161 | acm->writesize = le16_to_cpu(epwrite->wMaxPacketSize) * 20; |
1da177e4 LT |
1162 | acm->control = control_interface; |
1163 | acm->data = data_interface; | |
1164 | acm->minor = minor; | |
1165 | acm->dev = usb_dev; | |
1166 | acm->ctrl_caps = ac_management_function; | |
a2bfb4a3 ON |
1167 | if (quirks & NO_CAP_LINE) |
1168 | acm->ctrl_caps &= ~USB_CDC_CAP_LINE; | |
1da177e4 LT |
1169 | acm->ctrlsize = ctrlsize; |
1170 | acm->readsize = readsize; | |
86478944 | 1171 | acm->rx_buflimit = num_rx_buf; |
61a87adf DK |
1172 | acm->urb_task.func = acm_rx_tasklet; |
1173 | acm->urb_task.data = (unsigned long) acm; | |
c4028958 | 1174 | INIT_WORK(&acm->work, acm_softint); |
11ea859d | 1175 | INIT_WORK(&acm->waker, acm_waker); |
e5fbab51 | 1176 | init_waitqueue_head(&acm->drain_wait); |
1da177e4 | 1177 | spin_lock_init(&acm->throttle_lock); |
884b600f | 1178 | spin_lock_init(&acm->write_lock); |
61a87adf | 1179 | spin_lock_init(&acm->read_lock); |
1365baf7 | 1180 | mutex_init(&acm->mutex); |
61a87adf | 1181 | acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); |
cf7fdd57 ON |
1182 | acm->is_int_ep = usb_endpoint_xfer_int(epread); |
1183 | if (acm->is_int_ep) | |
1184 | acm->bInterval = epread->bInterval; | |
739e0285 AC |
1185 | tty_port_init(&acm->port); |
1186 | acm->port.ops = &acm_port_ops; | |
1da177e4 LT |
1187 | |
1188 | buf = usb_buffer_alloc(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); | |
1189 | if (!buf) { | |
898eb71c | 1190 | dev_dbg(&intf->dev, "out of memory (ctrl buffer alloc)\n"); |
1da177e4 LT |
1191 | goto alloc_fail2; |
1192 | } | |
1193 | acm->ctrl_buffer = buf; | |
1194 | ||
884b600f | 1195 | if (acm_write_buffers_alloc(acm) < 0) { |
898eb71c | 1196 | dev_dbg(&intf->dev, "out of memory (write buffer alloc)\n"); |
1da177e4 LT |
1197 | goto alloc_fail4; |
1198 | } | |
1da177e4 LT |
1199 | |
1200 | acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); | |
1201 | if (!acm->ctrlurb) { | |
898eb71c | 1202 | dev_dbg(&intf->dev, "out of memory (ctrlurb kmalloc)\n"); |
1da177e4 LT |
1203 | goto alloc_fail5; |
1204 | } | |
86478944 | 1205 | for (i = 0; i < num_rx_buf; i++) { |
61a87adf DK |
1206 | struct acm_ru *rcv = &(acm->ru[i]); |
1207 | ||
6e47e069 AC |
1208 | rcv->urb = usb_alloc_urb(0, GFP_KERNEL); |
1209 | if (rcv->urb == NULL) { | |
1210 | dev_dbg(&intf->dev, | |
1211 | "out of memory (read urbs usb_alloc_urb)\n"); | |
61a87adf DK |
1212 | goto alloc_fail7; |
1213 | } | |
1214 | ||
1215 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1216 | rcv->instance = acm; | |
1217 | } | |
86478944 | 1218 | for (i = 0; i < num_rx_buf; i++) { |
672c4e18 | 1219 | struct acm_rb *rb = &(acm->rb[i]); |
61a87adf | 1220 | |
672c4e18 DB |
1221 | rb->base = usb_buffer_alloc(acm->dev, readsize, |
1222 | GFP_KERNEL, &rb->dma); | |
1223 | if (!rb->base) { | |
6e47e069 AC |
1224 | dev_dbg(&intf->dev, |
1225 | "out of memory (read bufs usb_buffer_alloc)\n"); | |
61a87adf DK |
1226 | goto alloc_fail7; |
1227 | } | |
1da177e4 | 1228 | } |
6e47e069 | 1229 | for (i = 0; i < ACM_NW; i++) { |
e4cf3aa8 DE |
1230 | struct acm_wb *snd = &(acm->wb[i]); |
1231 | ||
6e47e069 AC |
1232 | snd->urb = usb_alloc_urb(0, GFP_KERNEL); |
1233 | if (snd->urb == NULL) { | |
1234 | dev_dbg(&intf->dev, | |
1235 | "out of memory (write urbs usb_alloc_urb)"); | |
e4cf3aa8 DE |
1236 | goto alloc_fail7; |
1237 | } | |
1238 | ||
5186ffee AL |
1239 | if (usb_endpoint_xfer_int(epwrite)) |
1240 | usb_fill_int_urb(snd->urb, usb_dev, | |
1241 | usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), | |
1242 | NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); | |
1243 | else | |
1244 | usb_fill_bulk_urb(snd->urb, usb_dev, | |
1245 | usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), | |
1246 | NULL, acm->writesize, acm_write_bulk, snd); | |
e4cf3aa8 DE |
1247 | snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
1248 | snd->instance = acm; | |
1da177e4 LT |
1249 | } |
1250 | ||
6e47e069 | 1251 | usb_set_intfdata(intf, acm); |
c4cabd28 ON |
1252 | |
1253 | i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); | |
1254 | if (i < 0) | |
1255 | goto alloc_fail8; | |
1256 | ||
1257 | if (cfd) { /* export the country data */ | |
1258 | acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); | |
1259 | if (!acm->country_codes) | |
1260 | goto skip_countries; | |
1261 | acm->country_code_size = cfd->bLength - 4; | |
6e47e069 AC |
1262 | memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, |
1263 | cfd->bLength - 4); | |
c4cabd28 ON |
1264 | acm->country_rel_date = cfd->iCountryCodeRelDate; |
1265 | ||
1266 | i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); | |
1267 | if (i < 0) { | |
1268 | kfree(acm->country_codes); | |
1269 | goto skip_countries; | |
1270 | } | |
1271 | ||
6e47e069 AC |
1272 | i = device_create_file(&intf->dev, |
1273 | &dev_attr_iCountryCodeRelDate); | |
c4cabd28 ON |
1274 | if (i < 0) { |
1275 | kfree(acm->country_codes); | |
1276 | goto skip_countries; | |
1277 | } | |
1278 | } | |
1279 | ||
1280 | skip_countries: | |
6e47e069 | 1281 | usb_fill_int_urb(acm->ctrlurb, usb_dev, |
a2bfb4a3 ON |
1282 | usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), |
1283 | acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, | |
1284 | /* works around buggy devices */ | |
1285 | epctrl->bInterval ? epctrl->bInterval : 0xff); | |
1da177e4 LT |
1286 | acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
1287 | acm->ctrlurb->transfer_dma = acm->ctrl_dma; | |
1288 | ||
1da177e4 LT |
1289 | dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); |
1290 | ||
1291 | acm_set_control(acm, acm->ctrlout); | |
1292 | ||
1293 | acm->line.dwDTERate = cpu_to_le32(9600); | |
1294 | acm->line.bDataBits = 8; | |
1295 | acm_set_line(acm, &acm->line); | |
1296 | ||
1297 | usb_driver_claim_interface(&acm_driver, data_interface, acm); | |
672c4e18 | 1298 | usb_set_intfdata(data_interface, acm); |
1da177e4 | 1299 | |
83ef344a | 1300 | usb_get_intf(control_interface); |
1301 | tty_register_device(acm_tty_driver, minor, &control_interface->dev); | |
1da177e4 LT |
1302 | |
1303 | acm_table[minor] = acm; | |
1da177e4 | 1304 | |
c4cabd28 ON |
1305 | return 0; |
1306 | alloc_fail8: | |
e4cf3aa8 DE |
1307 | for (i = 0; i < ACM_NW; i++) |
1308 | usb_free_urb(acm->wb[i].urb); | |
1da177e4 | 1309 | alloc_fail7: |
830f4021 | 1310 | acm_read_buffers_free(acm); |
86478944 | 1311 | for (i = 0; i < num_rx_buf; i++) |
61a87adf | 1312 | usb_free_urb(acm->ru[i].urb); |
1da177e4 LT |
1313 | usb_free_urb(acm->ctrlurb); |
1314 | alloc_fail5: | |
884b600f | 1315 | acm_write_buffers_free(acm); |
1da177e4 | 1316 | alloc_fail4: |
1da177e4 LT |
1317 | usb_buffer_free(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); |
1318 | alloc_fail2: | |
1319 | kfree(acm); | |
1320 | alloc_fail: | |
1321 | return -ENOMEM; | |
1322 | } | |
1323 | ||
1365baf7 ON |
1324 | static void stop_data_traffic(struct acm *acm) |
1325 | { | |
1326 | int i; | |
11ea859d | 1327 | dbg("Entering stop_data_traffic"); |
1365baf7 ON |
1328 | |
1329 | tasklet_disable(&acm->urb_task); | |
1330 | ||
1331 | usb_kill_urb(acm->ctrlurb); | |
6e47e069 | 1332 | for (i = 0; i < ACM_NW; i++) |
e4cf3aa8 | 1333 | usb_kill_urb(acm->wb[i].urb); |
1365baf7 ON |
1334 | for (i = 0; i < acm->rx_buflimit; i++) |
1335 | usb_kill_urb(acm->ru[i].urb); | |
1336 | ||
1365baf7 ON |
1337 | tasklet_enable(&acm->urb_task); |
1338 | ||
1339 | cancel_work_sync(&acm->work); | |
11ea859d | 1340 | cancel_work_sync(&acm->waker); |
1365baf7 ON |
1341 | } |
1342 | ||
1da177e4 LT |
1343 | static void acm_disconnect(struct usb_interface *intf) |
1344 | { | |
c4cabd28 | 1345 | struct acm *acm = usb_get_intfdata(intf); |
1da177e4 | 1346 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
10077d4a | 1347 | struct tty_struct *tty; |
1da177e4 | 1348 | |
672c4e18 DB |
1349 | /* sibling interface is already cleaning up */ |
1350 | if (!acm) | |
86067eea | 1351 | return; |
672c4e18 DB |
1352 | |
1353 | mutex_lock(&open_mutex); | |
6e47e069 | 1354 | if (acm->country_codes) { |
74da5d68 AS |
1355 | device_remove_file(&acm->control->dev, |
1356 | &dev_attr_wCountryCodes); | |
1357 | device_remove_file(&acm->control->dev, | |
1358 | &dev_attr_iCountryCodeRelDate); | |
c4cabd28 | 1359 | } |
74da5d68 | 1360 | device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); |
1da177e4 | 1361 | acm->dev = NULL; |
86067eea ON |
1362 | usb_set_intfdata(acm->control, NULL); |
1363 | usb_set_intfdata(acm->data, NULL); | |
1da177e4 | 1364 | |
1365baf7 | 1365 | stop_data_traffic(acm); |
1da177e4 | 1366 | |
884b600f | 1367 | acm_write_buffers_free(acm); |
6e47e069 AC |
1368 | usb_buffer_free(usb_dev, acm->ctrlsize, acm->ctrl_buffer, |
1369 | acm->ctrl_dma); | |
830f4021 | 1370 | acm_read_buffers_free(acm); |
1da177e4 | 1371 | |
a2bfb4a3 ON |
1372 | if (!acm->combined_interfaces) |
1373 | usb_driver_release_interface(&acm_driver, intf == acm->control ? | |
830f4021 | 1374 | acm->data : acm->control); |
1da177e4 | 1375 | |
10077d4a | 1376 | if (acm->port.count == 0) { |
83ef344a | 1377 | acm_tty_unregister(acm); |
4186ecf8 | 1378 | mutex_unlock(&open_mutex); |
1da177e4 LT |
1379 | return; |
1380 | } | |
1381 | ||
4186ecf8 | 1382 | mutex_unlock(&open_mutex); |
10077d4a AC |
1383 | tty = tty_port_tty_get(&acm->port); |
1384 | if (tty) { | |
1385 | tty_hangup(tty); | |
1386 | tty_kref_put(tty); | |
1387 | } | |
1da177e4 LT |
1388 | } |
1389 | ||
35758589 | 1390 | #ifdef CONFIG_PM |
1365baf7 ON |
1391 | static int acm_suspend(struct usb_interface *intf, pm_message_t message) |
1392 | { | |
1393 | struct acm *acm = usb_get_intfdata(intf); | |
11ea859d ON |
1394 | int cnt; |
1395 | ||
65bfd296 | 1396 | if (message.event & PM_EVENT_AUTO) { |
11ea859d ON |
1397 | int b; |
1398 | ||
1399 | spin_lock_irq(&acm->read_lock); | |
1400 | spin_lock(&acm->write_lock); | |
1401 | b = acm->processing + acm->transmitting; | |
1402 | spin_unlock(&acm->write_lock); | |
1403 | spin_unlock_irq(&acm->read_lock); | |
1404 | if (b) | |
1405 | return -EBUSY; | |
1406 | } | |
1407 | ||
1408 | spin_lock_irq(&acm->read_lock); | |
1409 | spin_lock(&acm->write_lock); | |
1410 | cnt = acm->susp_count++; | |
1411 | spin_unlock(&acm->write_lock); | |
1412 | spin_unlock_irq(&acm->read_lock); | |
1365baf7 | 1413 | |
11ea859d | 1414 | if (cnt) |
1365baf7 ON |
1415 | return 0; |
1416 | /* | |
1417 | we treat opened interfaces differently, | |
1418 | we must guard against open | |
1419 | */ | |
1420 | mutex_lock(&acm->mutex); | |
1421 | ||
10077d4a | 1422 | if (acm->port.count) |
1365baf7 ON |
1423 | stop_data_traffic(acm); |
1424 | ||
1425 | mutex_unlock(&acm->mutex); | |
1426 | return 0; | |
1427 | } | |
1428 | ||
1429 | static int acm_resume(struct usb_interface *intf) | |
1430 | { | |
1431 | struct acm *acm = usb_get_intfdata(intf); | |
1432 | int rv = 0; | |
11ea859d | 1433 | int cnt; |
1365baf7 | 1434 | |
11ea859d ON |
1435 | spin_lock_irq(&acm->read_lock); |
1436 | acm->susp_count -= 1; | |
1437 | cnt = acm->susp_count; | |
1438 | spin_unlock_irq(&acm->read_lock); | |
1439 | ||
1440 | if (cnt) | |
1365baf7 ON |
1441 | return 0; |
1442 | ||
1443 | mutex_lock(&acm->mutex); | |
10077d4a | 1444 | if (acm->port.count) { |
1365baf7 ON |
1445 | rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO); |
1446 | if (rv < 0) | |
11ea859d | 1447 | goto err_out; |
1365baf7 ON |
1448 | |
1449 | tasklet_schedule(&acm->urb_task); | |
1450 | } | |
1451 | ||
1452 | err_out: | |
1453 | mutex_unlock(&acm->mutex); | |
1454 | return rv; | |
1455 | } | |
35758589 ON |
1456 | |
1457 | #endif /* CONFIG_PM */ | |
1da177e4 LT |
1458 | /* |
1459 | * USB driver structure. | |
1460 | */ | |
1461 | ||
1462 | static struct usb_device_id acm_ids[] = { | |
1463 | /* quirky and broken devices */ | |
1464 | { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ | |
1465 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1466 | }, | |
b0e2a705 AA |
1467 | { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ |
1468 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1469 | }, | |
0f9c7b4a AL |
1470 | { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ |
1471 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1472 | }, | |
8753e65e MO |
1473 | { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ |
1474 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1475 | }, | |
91a9c921 CM |
1476 | { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ |
1477 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1478 | }, | |
7abcf20b AC |
1479 | { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ |
1480 | .driver_info = SINGLE_RX_URB, | |
1481 | }, | |
86478944 ON |
1482 | { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ |
1483 | .driver_info = SINGLE_RX_URB, /* firmware bug */ | |
1484 | }, | |
3dd2ae81 ON |
1485 | { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ |
1486 | .driver_info = SINGLE_RX_URB, /* firmware bug */ | |
1487 | }, | |
9be8456c ON |
1488 | { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ |
1489 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1490 | }, | |
6149ed5e IM |
1491 | { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ |
1492 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1493 | }, | |
c8fd2c37 ES |
1494 | { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ |
1495 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1496 | }, | |
c89c60e9 AC |
1497 | { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ |
1498 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1499 | }, | |
cab98a0a XK |
1500 | { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ |
1501 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1502 | }, | |
155df65a DT |
1503 | { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ |
1504 | }, | |
c332b4e1 AR |
1505 | { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ |
1506 | .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on | |
1507 | data interface instead of | |
1508 | communications interface. | |
1509 | Maybe we should define a new | |
1510 | quirk for this. */ | |
1511 | }, | |
1f17c502 KK |
1512 | { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ |
1513 | .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ | |
1514 | }, | |
9be8456c | 1515 | |
1da177e4 LT |
1516 | /* control interfaces with various AT-command sets */ |
1517 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1518 | USB_CDC_ACM_PROTO_AT_V25TER) }, | |
1519 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1520 | USB_CDC_ACM_PROTO_AT_PCCA101) }, | |
1521 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1522 | USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, | |
1523 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1524 | USB_CDC_ACM_PROTO_AT_GSM) }, | |
1525 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
6e47e069 | 1526 | USB_CDC_ACM_PROTO_AT_3G) }, |
1da177e4 LT |
1527 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
1528 | USB_CDC_ACM_PROTO_AT_CDMA) }, | |
1529 | ||
1530 | /* NOTE: COMM/ACM/0xff is likely MSFT RNDIS ... NOT a modem!! */ | |
1531 | { } | |
1532 | }; | |
1533 | ||
6e47e069 | 1534 | MODULE_DEVICE_TABLE(usb, acm_ids); |
1da177e4 LT |
1535 | |
1536 | static struct usb_driver acm_driver = { | |
1da177e4 LT |
1537 | .name = "cdc_acm", |
1538 | .probe = acm_probe, | |
1539 | .disconnect = acm_disconnect, | |
35758589 | 1540 | #ifdef CONFIG_PM |
1365baf7 ON |
1541 | .suspend = acm_suspend, |
1542 | .resume = acm_resume, | |
35758589 | 1543 | #endif |
1da177e4 | 1544 | .id_table = acm_ids, |
35758589 | 1545 | #ifdef CONFIG_PM |
1365baf7 | 1546 | .supports_autosuspend = 1, |
35758589 | 1547 | #endif |
1da177e4 LT |
1548 | }; |
1549 | ||
1550 | /* | |
1551 | * TTY driver structures. | |
1552 | */ | |
1553 | ||
b68e31d0 | 1554 | static const struct tty_operations acm_ops = { |
1da177e4 LT |
1555 | .open = acm_tty_open, |
1556 | .close = acm_tty_close, | |
10077d4a | 1557 | .hangup = acm_tty_hangup, |
1da177e4 LT |
1558 | .write = acm_tty_write, |
1559 | .write_room = acm_tty_write_room, | |
1560 | .ioctl = acm_tty_ioctl, | |
1561 | .throttle = acm_tty_throttle, | |
1562 | .unthrottle = acm_tty_unthrottle, | |
1563 | .chars_in_buffer = acm_tty_chars_in_buffer, | |
1564 | .break_ctl = acm_tty_break_ctl, | |
1565 | .set_termios = acm_tty_set_termios, | |
1566 | .tiocmget = acm_tty_tiocmget, | |
1567 | .tiocmset = acm_tty_tiocmset, | |
1568 | }; | |
1569 | ||
1570 | /* | |
1571 | * Init / exit. | |
1572 | */ | |
1573 | ||
1574 | static int __init acm_init(void) | |
1575 | { | |
1576 | int retval; | |
1577 | acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); | |
1578 | if (!acm_tty_driver) | |
1579 | return -ENOMEM; | |
1580 | acm_tty_driver->owner = THIS_MODULE, | |
1581 | acm_tty_driver->driver_name = "acm", | |
1582 | acm_tty_driver->name = "ttyACM", | |
1da177e4 LT |
1583 | acm_tty_driver->major = ACM_TTY_MAJOR, |
1584 | acm_tty_driver->minor_start = 0, | |
1585 | acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, | |
1586 | acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, | |
331b8319 | 1587 | acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
1da177e4 | 1588 | acm_tty_driver->init_termios = tty_std_termios; |
6e47e069 AC |
1589 | acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | |
1590 | HUPCL | CLOCAL; | |
1da177e4 LT |
1591 | tty_set_operations(acm_tty_driver, &acm_ops); |
1592 | ||
1593 | retval = tty_register_driver(acm_tty_driver); | |
1594 | if (retval) { | |
1595 | put_tty_driver(acm_tty_driver); | |
1596 | return retval; | |
1597 | } | |
1598 | ||
1599 | retval = usb_register(&acm_driver); | |
1600 | if (retval) { | |
1601 | tty_unregister_driver(acm_tty_driver); | |
1602 | put_tty_driver(acm_tty_driver); | |
1603 | return retval; | |
1604 | } | |
1605 | ||
5909f6ea GKH |
1606 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
1607 | DRIVER_DESC "\n"); | |
1da177e4 LT |
1608 | |
1609 | return 0; | |
1610 | } | |
1611 | ||
1612 | static void __exit acm_exit(void) | |
1613 | { | |
1614 | usb_deregister(&acm_driver); | |
1615 | tty_unregister_driver(acm_tty_driver); | |
1616 | put_tty_driver(acm_tty_driver); | |
1617 | } | |
1618 | ||
1619 | module_init(acm_init); | |
1620 | module_exit(acm_exit); | |
1621 | ||
6e47e069 AC |
1622 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1623 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 | 1624 | MODULE_LICENSE("GPL"); |
e766aeb8 | 1625 | MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); |