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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--; |
97d35f95 | 173 | usb_autopm_put_interface_async(acm->control); |
884b600f ON |
174 | } |
175 | ||
176 | /* | |
177 | * Poke write. | |
11ea859d ON |
178 | * |
179 | * the caller is responsible for locking | |
884b600f | 180 | */ |
11ea859d ON |
181 | |
182 | static int acm_start_wb(struct acm *acm, struct acm_wb *wb) | |
183 | { | |
184 | int rc; | |
185 | ||
186 | acm->transmitting++; | |
187 | ||
188 | wb->urb->transfer_buffer = wb->buf; | |
189 | wb->urb->transfer_dma = wb->dmah; | |
190 | wb->urb->transfer_buffer_length = wb->len; | |
191 | wb->urb->dev = acm->dev; | |
192 | ||
6e47e069 AC |
193 | rc = usb_submit_urb(wb->urb, GFP_ATOMIC); |
194 | if (rc < 0) { | |
11ea859d ON |
195 | dbg("usb_submit_urb(write bulk) failed: %d", rc); |
196 | acm_write_done(acm, wb); | |
197 | } | |
198 | return rc; | |
199 | } | |
200 | ||
e4cf3aa8 | 201 | static int acm_write_start(struct acm *acm, int wbn) |
884b600f ON |
202 | { |
203 | unsigned long flags; | |
934da463 | 204 | struct acm_wb *wb = &acm->wb[wbn]; |
884b600f ON |
205 | int rc; |
206 | ||
207 | spin_lock_irqsave(&acm->write_lock, flags); | |
208 | if (!acm->dev) { | |
934da463 | 209 | wb->use = 0; |
884b600f ON |
210 | spin_unlock_irqrestore(&acm->write_lock, flags); |
211 | return -ENODEV; | |
212 | } | |
213 | ||
11ea859d | 214 | dbg("%s susp_count: %d", __func__, acm->susp_count); |
97d35f95 | 215 | usb_autopm_get_interface_async(acm->control); |
11ea859d | 216 | if (acm->susp_count) { |
97d35f95 ON |
217 | if (!acm->delayed_wb) |
218 | acm->delayed_wb = wb; | |
219 | else | |
220 | usb_autopm_put_interface_async(acm->control); | |
11ea859d ON |
221 | spin_unlock_irqrestore(&acm->write_lock, flags); |
222 | return 0; /* A white lie */ | |
223 | } | |
224 | usb_mark_last_busy(acm->dev); | |
225 | ||
11ea859d | 226 | rc = acm_start_wb(acm, wb); |
884b600f ON |
227 | spin_unlock_irqrestore(&acm->write_lock, flags); |
228 | ||
884b600f | 229 | return rc; |
11ea859d | 230 | |
884b600f | 231 | } |
c4cabd28 ON |
232 | /* |
233 | * attributes exported through sysfs | |
234 | */ | |
235 | static ssize_t show_caps | |
236 | (struct device *dev, struct device_attribute *attr, char *buf) | |
237 | { | |
238 | struct usb_interface *intf = to_usb_interface(dev); | |
239 | struct acm *acm = usb_get_intfdata(intf); | |
240 | ||
241 | return sprintf(buf, "%d", acm->ctrl_caps); | |
242 | } | |
243 | static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL); | |
244 | ||
245 | static ssize_t show_country_codes | |
246 | (struct device *dev, struct device_attribute *attr, char *buf) | |
247 | { | |
248 | struct usb_interface *intf = to_usb_interface(dev); | |
249 | struct acm *acm = usb_get_intfdata(intf); | |
250 | ||
251 | memcpy(buf, acm->country_codes, acm->country_code_size); | |
252 | return acm->country_code_size; | |
253 | } | |
254 | ||
255 | static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL); | |
256 | ||
257 | static ssize_t show_country_rel_date | |
258 | (struct device *dev, struct device_attribute *attr, char *buf) | |
259 | { | |
260 | struct usb_interface *intf = to_usb_interface(dev); | |
261 | struct acm *acm = usb_get_intfdata(intf); | |
262 | ||
263 | return sprintf(buf, "%d", acm->country_rel_date); | |
264 | } | |
884b600f | 265 | |
c4cabd28 | 266 | static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL); |
1da177e4 LT |
267 | /* |
268 | * Interrupt handlers for various ACM device responses | |
269 | */ | |
270 | ||
271 | /* control interface reports status changes with "interrupt" transfers */ | |
7d12e780 | 272 | static void acm_ctrl_irq(struct urb *urb) |
1da177e4 LT |
273 | { |
274 | struct acm *acm = urb->context; | |
275 | struct usb_cdc_notification *dr = urb->transfer_buffer; | |
10077d4a | 276 | struct tty_struct *tty; |
1da177e4 LT |
277 | unsigned char *data; |
278 | int newctrl; | |
185d4058 GKH |
279 | int retval; |
280 | int status = urb->status; | |
1da177e4 | 281 | |
185d4058 | 282 | switch (status) { |
1da177e4 LT |
283 | case 0: |
284 | /* success */ | |
285 | break; | |
286 | case -ECONNRESET: | |
287 | case -ENOENT: | |
288 | case -ESHUTDOWN: | |
289 | /* this urb is terminated, clean up */ | |
441b62c1 | 290 | dbg("%s - urb shutting down with status: %d", __func__, status); |
1da177e4 LT |
291 | return; |
292 | default: | |
441b62c1 | 293 | dbg("%s - nonzero urb status received: %d", __func__, status); |
1da177e4 LT |
294 | goto exit; |
295 | } | |
296 | ||
297 | if (!ACM_READY(acm)) | |
298 | goto exit; | |
299 | ||
300 | data = (unsigned char *)(dr + 1); | |
301 | switch (dr->bNotificationType) { | |
6e47e069 AC |
302 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: |
303 | dbg("%s network", dr->wValue ? | |
304 | "connected to" : "disconnected from"); | |
305 | break; | |
1da177e4 | 306 | |
6e47e069 AC |
307 | case USB_CDC_NOTIFY_SERIAL_STATE: |
308 | tty = tty_port_tty_get(&acm->port); | |
309 | newctrl = get_unaligned_le16(data); | |
1da177e4 | 310 | |
6e47e069 AC |
311 | if (tty) { |
312 | if (!acm->clocal && | |
313 | (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { | |
314 | dbg("calling hangup"); | |
315 | tty_hangup(tty); | |
1da177e4 | 316 | } |
6e47e069 AC |
317 | tty_kref_put(tty); |
318 | } | |
1da177e4 | 319 | |
6e47e069 | 320 | acm->ctrlin = newctrl; |
1da177e4 | 321 | |
6e47e069 AC |
322 | dbg("input control lines: dcd%c dsr%c break%c ring%c framing%c parity%c overrun%c", |
323 | acm->ctrlin & ACM_CTRL_DCD ? '+' : '-', | |
324 | acm->ctrlin & ACM_CTRL_DSR ? '+' : '-', | |
325 | acm->ctrlin & ACM_CTRL_BRK ? '+' : '-', | |
326 | acm->ctrlin & ACM_CTRL_RI ? '+' : '-', | |
327 | acm->ctrlin & ACM_CTRL_FRAMING ? '+' : '-', | |
328 | acm->ctrlin & ACM_CTRL_PARITY ? '+' : '-', | |
329 | acm->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-'); | |
1da177e4 LT |
330 | break; |
331 | ||
6e47e069 AC |
332 | default: |
333 | dbg("unknown notification %d received: index %d len %d data0 %d data1 %d", | |
334 | dr->bNotificationType, dr->wIndex, | |
335 | dr->wLength, data[0], data[1]); | |
336 | break; | |
1da177e4 LT |
337 | } |
338 | exit: | |
11ea859d | 339 | usb_mark_last_busy(acm->dev); |
6e47e069 | 340 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
185d4058 | 341 | if (retval) |
9908a32e GKH |
342 | dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with " |
343 | "result %d", __func__, retval); | |
1da177e4 LT |
344 | } |
345 | ||
346 | /* data interface returns incoming bytes, or we got unthrottled */ | |
7d12e780 | 347 | static void acm_read_bulk(struct urb *urb) |
1da177e4 | 348 | { |
61a87adf DK |
349 | struct acm_rb *buf; |
350 | struct acm_ru *rcv = urb->context; | |
351 | struct acm *acm = rcv->instance; | |
86478944 | 352 | int status = urb->status; |
185d4058 GKH |
353 | |
354 | dbg("Entering acm_read_bulk with status %d", status); | |
1da177e4 | 355 | |
11ea859d ON |
356 | if (!ACM_READY(acm)) { |
357 | dev_dbg(&acm->data->dev, "Aborting, acm not ready"); | |
1da177e4 | 358 | return; |
11ea859d ON |
359 | } |
360 | usb_mark_last_busy(acm->dev); | |
1da177e4 | 361 | |
86478944 | 362 | if (status) |
898eb71c | 363 | dev_dbg(&acm->data->dev, "bulk rx status %d\n", status); |
1da177e4 | 364 | |
61a87adf DK |
365 | buf = rcv->buffer; |
366 | buf->size = urb->actual_length; | |
367 | ||
86478944 ON |
368 | if (likely(status == 0)) { |
369 | spin_lock(&acm->read_lock); | |
11ea859d | 370 | acm->processing++; |
86478944 ON |
371 | list_add_tail(&rcv->list, &acm->spare_read_urbs); |
372 | list_add_tail(&buf->list, &acm->filled_read_bufs); | |
373 | spin_unlock(&acm->read_lock); | |
374 | } else { | |
375 | /* we drop the buffer due to an error */ | |
376 | spin_lock(&acm->read_lock); | |
377 | list_add_tail(&rcv->list, &acm->spare_read_urbs); | |
378 | list_add(&buf->list, &acm->spare_read_bufs); | |
379 | spin_unlock(&acm->read_lock); | |
380 | /* nevertheless the tasklet must be kicked unconditionally | |
381 | so the queue cannot dry up */ | |
382 | } | |
11ea859d ON |
383 | if (likely(!acm->susp_count)) |
384 | tasklet_schedule(&acm->urb_task); | |
1da177e4 LT |
385 | } |
386 | ||
387 | static void acm_rx_tasklet(unsigned long _acm) | |
388 | { | |
389 | struct acm *acm = (void *)_acm; | |
61a87adf | 390 | struct acm_rb *buf; |
10077d4a | 391 | struct tty_struct *tty; |
61a87adf | 392 | struct acm_ru *rcv; |
762f007b | 393 | unsigned long flags; |
ca79b7b4 | 394 | unsigned char throttled; |
11ea859d | 395 | |
1da177e4 LT |
396 | dbg("Entering acm_rx_tasklet"); |
397 | ||
10077d4a | 398 | if (!ACM_READY(acm)) { |
11ea859d | 399 | dbg("acm_rx_tasklet: ACM not ready"); |
ca79b7b4 | 400 | return; |
11ea859d | 401 | } |
ca79b7b4 | 402 | |
834dbca5 | 403 | spin_lock_irqsave(&acm->throttle_lock, flags); |
ca79b7b4 | 404 | throttled = acm->throttle; |
834dbca5 | 405 | spin_unlock_irqrestore(&acm->throttle_lock, flags); |
10077d4a | 406 | if (throttled) { |
11ea859d | 407 | dbg("acm_rx_tasklet: throttled"); |
61a87adf | 408 | return; |
11ea859d | 409 | } |
61a87adf | 410 | |
10077d4a AC |
411 | tty = tty_port_tty_get(&acm->port); |
412 | ||
61a87adf | 413 | next_buffer: |
762f007b | 414 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 415 | if (list_empty(&acm->filled_read_bufs)) { |
762f007b | 416 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf | 417 | goto urbs; |
1da177e4 | 418 | } |
61a87adf DK |
419 | buf = list_entry(acm->filled_read_bufs.next, |
420 | struct acm_rb, list); | |
421 | list_del(&buf->list); | |
762f007b | 422 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf | 423 | |
3dd2ae81 | 424 | dbg("acm_rx_tasklet: procesing buf 0x%p, size = %d", buf, buf->size); |
61a87adf | 425 | |
10077d4a AC |
426 | if (tty) { |
427 | spin_lock_irqsave(&acm->throttle_lock, flags); | |
428 | throttled = acm->throttle; | |
429 | spin_unlock_irqrestore(&acm->throttle_lock, flags); | |
430 | if (!throttled) { | |
10077d4a AC |
431 | tty_insert_flip_string(tty, buf->base, buf->size); |
432 | tty_flip_buffer_push(tty); | |
433 | } else { | |
434 | tty_kref_put(tty); | |
435 | dbg("Throttling noticed"); | |
436 | spin_lock_irqsave(&acm->read_lock, flags); | |
437 | list_add(&buf->list, &acm->filled_read_bufs); | |
438 | spin_unlock_irqrestore(&acm->read_lock, flags); | |
439 | return; | |
440 | } | |
1da177e4 | 441 | } |
1da177e4 | 442 | |
762f007b | 443 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 444 | list_add(&buf->list, &acm->spare_read_bufs); |
762f007b | 445 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf DK |
446 | goto next_buffer; |
447 | ||
448 | urbs: | |
10077d4a AC |
449 | tty_kref_put(tty); |
450 | ||
61a87adf | 451 | while (!list_empty(&acm->spare_read_bufs)) { |
762f007b | 452 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 453 | if (list_empty(&acm->spare_read_urbs)) { |
11ea859d | 454 | acm->processing = 0; |
762f007b | 455 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf DK |
456 | return; |
457 | } | |
458 | rcv = list_entry(acm->spare_read_urbs.next, | |
459 | struct acm_ru, list); | |
460 | list_del(&rcv->list); | |
762f007b | 461 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf DK |
462 | |
463 | buf = list_entry(acm->spare_read_bufs.next, | |
464 | struct acm_rb, list); | |
465 | list_del(&buf->list); | |
466 | ||
467 | rcv->buffer = buf; | |
468 | ||
cf7fdd57 | 469 | if (acm->is_int_ep) |
5186ffee AL |
470 | usb_fill_int_urb(rcv->urb, acm->dev, |
471 | acm->rx_endpoint, | |
472 | buf->base, | |
473 | acm->readsize, | |
cf7fdd57 | 474 | acm_read_bulk, rcv, acm->bInterval); |
5186ffee AL |
475 | else |
476 | usb_fill_bulk_urb(rcv->urb, acm->dev, | |
477 | acm->rx_endpoint, | |
478 | buf->base, | |
479 | acm->readsize, | |
480 | acm_read_bulk, rcv); | |
61a87adf DK |
481 | rcv->urb->transfer_dma = buf->dma; |
482 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
483 | ||
6e47e069 AC |
484 | /* This shouldn't kill the driver as unsuccessful URBs are |
485 | returned to the free-urbs-pool and resubmited ASAP */ | |
11ea859d | 486 | spin_lock_irqsave(&acm->read_lock, flags); |
6e47e069 AC |
487 | if (acm->susp_count || |
488 | usb_submit_urb(rcv->urb, GFP_ATOMIC) < 0) { | |
61a87adf | 489 | list_add(&buf->list, &acm->spare_read_bufs); |
61a87adf | 490 | list_add(&rcv->list, &acm->spare_read_urbs); |
11ea859d | 491 | acm->processing = 0; |
762f007b | 492 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf | 493 | return; |
11ea859d ON |
494 | } else { |
495 | spin_unlock_irqrestore(&acm->read_lock, flags); | |
496 | dbg("acm_rx_tasklet: sending urb 0x%p, rcv 0x%p, buf 0x%p", rcv->urb, rcv, buf); | |
61a87adf DK |
497 | } |
498 | } | |
11ea859d ON |
499 | spin_lock_irqsave(&acm->read_lock, flags); |
500 | acm->processing = 0; | |
501 | spin_unlock_irqrestore(&acm->read_lock, flags); | |
1da177e4 LT |
502 | } |
503 | ||
504 | /* data interface wrote those outgoing bytes */ | |
7d12e780 | 505 | static void acm_write_bulk(struct urb *urb) |
1da177e4 | 506 | { |
cdc97792 | 507 | struct acm_wb *wb = urb->context; |
e5fbab51 | 508 | struct acm *acm = wb->instance; |
ad0b65ef | 509 | unsigned long flags; |
1da177e4 | 510 | |
e5fbab51 DB |
511 | if (verbose || urb->status |
512 | || (urb->actual_length != urb->transfer_buffer_length)) | |
513 | dev_dbg(&acm->data->dev, "tx %d/%d bytes -- > %d\n", | |
514 | urb->actual_length, | |
515 | urb->transfer_buffer_length, | |
516 | urb->status); | |
1da177e4 | 517 | |
ad0b65ef | 518 | spin_lock_irqsave(&acm->write_lock, flags); |
e4cf3aa8 | 519 | acm_write_done(acm, wb); |
ad0b65ef | 520 | spin_unlock_irqrestore(&acm->write_lock, flags); |
884b600f ON |
521 | if (ACM_READY(acm)) |
522 | schedule_work(&acm->work); | |
e5fbab51 DB |
523 | else |
524 | wake_up_interruptible(&acm->drain_wait); | |
1da177e4 LT |
525 | } |
526 | ||
c4028958 | 527 | static void acm_softint(struct work_struct *work) |
1da177e4 | 528 | { |
c4028958 | 529 | struct acm *acm = container_of(work, struct acm, work); |
10077d4a | 530 | struct tty_struct *tty; |
e5fbab51 DB |
531 | |
532 | dev_vdbg(&acm->data->dev, "tx work\n"); | |
1da177e4 LT |
533 | if (!ACM_READY(acm)) |
534 | return; | |
10077d4a AC |
535 | tty = tty_port_tty_get(&acm->port); |
536 | tty_wakeup(tty); | |
537 | tty_kref_put(tty); | |
1da177e4 LT |
538 | } |
539 | ||
540 | /* | |
541 | * TTY handlers | |
542 | */ | |
543 | ||
544 | static int acm_tty_open(struct tty_struct *tty, struct file *filp) | |
545 | { | |
546 | struct acm *acm; | |
42dd2aa6 | 547 | int rv = -ENODEV; |
61a87adf | 548 | int i; |
3dd2ae81 | 549 | dbg("Entering acm_tty_open."); |
4186ecf8 AV |
550 | |
551 | mutex_lock(&open_mutex); | |
1da177e4 LT |
552 | |
553 | acm = acm_table[tty->index]; | |
554 | if (!acm || !acm->dev) | |
2b626dc1 | 555 | goto out; |
1da177e4 LT |
556 | else |
557 | rv = 0; | |
558 | ||
28d1dfad | 559 | set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); |
10077d4a | 560 | |
1da177e4 | 561 | tty->driver_data = acm; |
10077d4a | 562 | tty_port_tty_set(&acm->port, tty); |
1da177e4 | 563 | |
94409cc1 ON |
564 | if (usb_autopm_get_interface(acm->control) < 0) |
565 | goto early_bail; | |
11ea859d ON |
566 | else |
567 | acm->control->needs_remote_wakeup = 1; | |
1365baf7 ON |
568 | |
569 | mutex_lock(&acm->mutex); | |
10077d4a | 570 | if (acm->port.count++) { |
2b626dc1 | 571 | mutex_unlock(&acm->mutex); |
1365baf7 | 572 | usb_autopm_put_interface(acm->control); |
2b626dc1 | 573 | goto out; |
10077d4a | 574 | } |
1365baf7 | 575 | |
1da177e4 LT |
576 | acm->ctrlurb->dev = acm->dev; |
577 | if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) { | |
578 | dbg("usb_submit_urb(ctrl irq) failed"); | |
579 | goto bail_out; | |
580 | } | |
581 | ||
ca79b7b4 ON |
582 | if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) && |
583 | (acm->ctrl_caps & USB_CDC_CAP_LINE)) | |
1da177e4 | 584 | goto full_bailout; |
10077d4a | 585 | |
11ea859d | 586 | usb_autopm_put_interface(acm->control); |
1da177e4 | 587 | |
61a87adf DK |
588 | INIT_LIST_HEAD(&acm->spare_read_urbs); |
589 | INIT_LIST_HEAD(&acm->spare_read_bufs); | |
590 | INIT_LIST_HEAD(&acm->filled_read_bufs); | |
6e47e069 AC |
591 | |
592 | for (i = 0; i < acm->rx_buflimit; i++) | |
61a87adf | 593 | list_add(&(acm->ru[i].list), &acm->spare_read_urbs); |
6e47e069 | 594 | for (i = 0; i < acm->rx_buflimit; i++) |
61a87adf | 595 | list_add(&(acm->rb[i].list), &acm->spare_read_bufs); |
61a87adf | 596 | |
ca79b7b4 ON |
597 | acm->throttle = 0; |
598 | ||
7af25b4b | 599 | set_bit(ASYNCB_INITIALIZED, &acm->port.flags); |
10077d4a | 600 | rv = tty_port_block_til_ready(&acm->port, tty, filp); |
18a77b5d | 601 | tasklet_schedule(&acm->urb_task); |
2b626dc1 | 602 | |
1365baf7 | 603 | mutex_unlock(&acm->mutex); |
2b626dc1 | 604 | out: |
94409cc1 | 605 | mutex_unlock(&open_mutex); |
1da177e4 LT |
606 | return rv; |
607 | ||
608 | full_bailout: | |
1da177e4 LT |
609 | usb_kill_urb(acm->ctrlurb); |
610 | bail_out: | |
10077d4a | 611 | acm->port.count--; |
1365baf7 | 612 | mutex_unlock(&acm->mutex); |
2b626dc1 | 613 | usb_autopm_put_interface(acm->control); |
94409cc1 ON |
614 | early_bail: |
615 | mutex_unlock(&open_mutex); | |
10077d4a | 616 | tty_port_tty_set(&acm->port, NULL); |
1da177e4 LT |
617 | return -EIO; |
618 | } | |
619 | ||
83ef344a | 620 | static void acm_tty_unregister(struct acm *acm) |
621 | { | |
10077d4a | 622 | int i, nr; |
61a87adf | 623 | |
86478944 | 624 | nr = acm->rx_buflimit; |
83ef344a | 625 | tty_unregister_device(acm_tty_driver, acm->minor); |
626 | usb_put_intf(acm->control); | |
627 | acm_table[acm->minor] = NULL; | |
628 | usb_free_urb(acm->ctrlurb); | |
e4cf3aa8 DE |
629 | for (i = 0; i < ACM_NW; i++) |
630 | usb_free_urb(acm->wb[i].urb); | |
86478944 | 631 | for (i = 0; i < nr; i++) |
61a87adf | 632 | usb_free_urb(acm->ru[i].urb); |
c4cabd28 | 633 | kfree(acm->country_codes); |
83ef344a | 634 | kfree(acm); |
635 | } | |
636 | ||
e5fbab51 DB |
637 | static int acm_tty_chars_in_buffer(struct tty_struct *tty); |
638 | ||
10077d4a AC |
639 | static void acm_port_down(struct acm *acm, int drain) |
640 | { | |
641 | int i, nr = acm->rx_buflimit; | |
642 | mutex_lock(&open_mutex); | |
643 | if (acm->dev) { | |
644 | usb_autopm_get_interface(acm->control); | |
645 | acm_set_control(acm, acm->ctrlout = 0); | |
646 | /* try letting the last writes drain naturally */ | |
647 | if (drain) { | |
648 | wait_event_interruptible_timeout(acm->drain_wait, | |
649 | (ACM_NW == acm_wb_is_avail(acm)) || !acm->dev, | |
650 | ACM_CLOSE_TIMEOUT * HZ); | |
651 | } | |
652 | usb_kill_urb(acm->ctrlurb); | |
653 | for (i = 0; i < ACM_NW; i++) | |
654 | usb_kill_urb(acm->wb[i].urb); | |
655 | for (i = 0; i < nr; i++) | |
656 | usb_kill_urb(acm->ru[i].urb); | |
657 | acm->control->needs_remote_wakeup = 0; | |
658 | usb_autopm_put_interface(acm->control); | |
659 | } | |
660 | mutex_unlock(&open_mutex); | |
661 | } | |
662 | ||
663 | static void acm_tty_hangup(struct tty_struct *tty) | |
664 | { | |
665 | struct acm *acm = tty->driver_data; | |
666 | tty_port_hangup(&acm->port); | |
667 | acm_port_down(acm, 0); | |
668 | } | |
669 | ||
1da177e4 LT |
670 | static void acm_tty_close(struct tty_struct *tty, struct file *filp) |
671 | { | |
672 | struct acm *acm = tty->driver_data; | |
673 | ||
10077d4a AC |
674 | /* Perform the closing process and see if we need to do the hardware |
675 | shutdown */ | |
051522bb | 676 | if (!acm) |
1da177e4 | 677 | return; |
051522bb FL |
678 | if (tty_port_close_start(&acm->port, tty, filp) == 0) { |
679 | mutex_lock(&open_mutex); | |
680 | if (!acm->dev) { | |
681 | tty_port_tty_set(&acm->port, NULL); | |
682 | acm_tty_unregister(acm); | |
683 | tty->driver_data = NULL; | |
684 | } | |
685 | mutex_unlock(&open_mutex); | |
686 | return; | |
687 | } | |
10077d4a AC |
688 | acm_port_down(acm, 0); |
689 | tty_port_close_end(&acm->port, tty); | |
10077d4a | 690 | tty_port_tty_set(&acm->port, NULL); |
1da177e4 LT |
691 | } |
692 | ||
6e47e069 AC |
693 | static int acm_tty_write(struct tty_struct *tty, |
694 | const unsigned char *buf, int count) | |
1da177e4 LT |
695 | { |
696 | struct acm *acm = tty->driver_data; | |
697 | int stat; | |
884b600f ON |
698 | unsigned long flags; |
699 | int wbn; | |
700 | struct acm_wb *wb; | |
701 | ||
3dd2ae81 | 702 | dbg("Entering acm_tty_write to write %d bytes,", count); |
1da177e4 LT |
703 | |
704 | if (!ACM_READY(acm)) | |
705 | return -EINVAL; | |
1da177e4 LT |
706 | if (!count) |
707 | return 0; | |
708 | ||
884b600f | 709 | spin_lock_irqsave(&acm->write_lock, flags); |
6e47e069 AC |
710 | wbn = acm_wb_alloc(acm); |
711 | if (wbn < 0) { | |
884b600f | 712 | spin_unlock_irqrestore(&acm->write_lock, flags); |
884b600f ON |
713 | return 0; |
714 | } | |
715 | wb = &acm->wb[wbn]; | |
1da177e4 | 716 | |
884b600f | 717 | count = (count > acm->writesize) ? acm->writesize : count; |
1da177e4 | 718 | dbg("Get %d bytes...", count); |
884b600f ON |
719 | memcpy(wb->buf, buf, count); |
720 | wb->len = count; | |
721 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
1da177e4 | 722 | |
6e47e069 AC |
723 | stat = acm_write_start(acm, wbn); |
724 | if (stat < 0) | |
1da177e4 | 725 | return stat; |
1da177e4 LT |
726 | return count; |
727 | } | |
728 | ||
729 | static int acm_tty_write_room(struct tty_struct *tty) | |
730 | { | |
731 | struct acm *acm = tty->driver_data; | |
732 | if (!ACM_READY(acm)) | |
733 | return -EINVAL; | |
884b600f ON |
734 | /* |
735 | * Do not let the line discipline to know that we have a reserve, | |
736 | * or it might get too enthusiastic. | |
737 | */ | |
934da463 | 738 | return acm_wb_is_avail(acm) ? acm->writesize : 0; |
1da177e4 LT |
739 | } |
740 | ||
741 | static int acm_tty_chars_in_buffer(struct tty_struct *tty) | |
742 | { | |
743 | struct acm *acm = tty->driver_data; | |
744 | if (!ACM_READY(acm)) | |
23198fda | 745 | return 0; |
884b600f ON |
746 | /* |
747 | * This is inaccurate (overcounts), but it works. | |
748 | */ | |
86478944 | 749 | return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; |
1da177e4 LT |
750 | } |
751 | ||
752 | static void acm_tty_throttle(struct tty_struct *tty) | |
753 | { | |
754 | struct acm *acm = tty->driver_data; | |
755 | if (!ACM_READY(acm)) | |
756 | return; | |
757 | spin_lock_bh(&acm->throttle_lock); | |
758 | acm->throttle = 1; | |
759 | spin_unlock_bh(&acm->throttle_lock); | |
760 | } | |
761 | ||
762 | static void acm_tty_unthrottle(struct tty_struct *tty) | |
763 | { | |
764 | struct acm *acm = tty->driver_data; | |
765 | if (!ACM_READY(acm)) | |
766 | return; | |
767 | spin_lock_bh(&acm->throttle_lock); | |
768 | acm->throttle = 0; | |
769 | spin_unlock_bh(&acm->throttle_lock); | |
61a87adf | 770 | tasklet_schedule(&acm->urb_task); |
1da177e4 LT |
771 | } |
772 | ||
9e98966c | 773 | static int acm_tty_break_ctl(struct tty_struct *tty, int state) |
1da177e4 LT |
774 | { |
775 | struct acm *acm = tty->driver_data; | |
9e98966c | 776 | int retval; |
1da177e4 | 777 | if (!ACM_READY(acm)) |
9e98966c AC |
778 | return -EINVAL; |
779 | retval = acm_send_break(acm, state ? 0xffff : 0); | |
780 | if (retval < 0) | |
1da177e4 | 781 | dbg("send break failed"); |
9e98966c | 782 | return retval; |
1da177e4 LT |
783 | } |
784 | ||
785 | static int acm_tty_tiocmget(struct tty_struct *tty, struct file *file) | |
786 | { | |
787 | struct acm *acm = tty->driver_data; | |
788 | ||
789 | if (!ACM_READY(acm)) | |
790 | return -EINVAL; | |
791 | ||
792 | return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | | |
793 | (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | | |
794 | (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | | |
795 | (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | | |
796 | (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | | |
797 | TIOCM_CTS; | |
798 | } | |
799 | ||
800 | static int acm_tty_tiocmset(struct tty_struct *tty, struct file *file, | |
801 | unsigned int set, unsigned int clear) | |
802 | { | |
803 | struct acm *acm = tty->driver_data; | |
804 | unsigned int newctrl; | |
805 | ||
806 | if (!ACM_READY(acm)) | |
807 | return -EINVAL; | |
808 | ||
809 | newctrl = acm->ctrlout; | |
6e47e069 AC |
810 | set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | |
811 | (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); | |
812 | clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | | |
813 | (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); | |
1da177e4 LT |
814 | |
815 | newctrl = (newctrl & ~clear) | set; | |
816 | ||
817 | if (acm->ctrlout == newctrl) | |
818 | return 0; | |
819 | return acm_set_control(acm, acm->ctrlout = newctrl); | |
820 | } | |
821 | ||
6e47e069 AC |
822 | static int acm_tty_ioctl(struct tty_struct *tty, struct file *file, |
823 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
824 | { |
825 | struct acm *acm = tty->driver_data; | |
826 | ||
827 | if (!ACM_READY(acm)) | |
828 | return -EINVAL; | |
829 | ||
830 | return -ENOIOCTLCMD; | |
831 | } | |
832 | ||
4c4c9432 | 833 | static const __u32 acm_tty_speed[] = { |
1da177e4 LT |
834 | 0, 50, 75, 110, 134, 150, 200, 300, 600, |
835 | 1200, 1800, 2400, 4800, 9600, 19200, 38400, | |
836 | 57600, 115200, 230400, 460800, 500000, 576000, | |
837 | 921600, 1000000, 1152000, 1500000, 2000000, | |
838 | 2500000, 3000000, 3500000, 4000000 | |
839 | }; | |
840 | ||
4c4c9432 | 841 | static const __u8 acm_tty_size[] = { |
1da177e4 LT |
842 | 5, 6, 7, 8 |
843 | }; | |
844 | ||
6e47e069 AC |
845 | static void acm_tty_set_termios(struct tty_struct *tty, |
846 | struct ktermios *termios_old) | |
1da177e4 LT |
847 | { |
848 | struct acm *acm = tty->driver_data; | |
606d099c | 849 | struct ktermios *termios = tty->termios; |
1da177e4 LT |
850 | struct usb_cdc_line_coding newline; |
851 | int newctrl = acm->ctrlout; | |
852 | ||
853 | if (!ACM_READY(acm)) | |
854 | return; | |
855 | ||
9b80fee1 | 856 | newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); |
1da177e4 LT |
857 | newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; |
858 | newline.bParityType = termios->c_cflag & PARENB ? | |
6e47e069 AC |
859 | (termios->c_cflag & PARODD ? 1 : 2) + |
860 | (termios->c_cflag & CMSPAR ? 2 : 0) : 0; | |
1da177e4 | 861 | newline.bDataBits = acm_tty_size[(termios->c_cflag & CSIZE) >> 4]; |
6e47e069 | 862 | /* FIXME: Needs to clear unsupported bits in the termios */ |
1da177e4 LT |
863 | acm->clocal = ((termios->c_cflag & CLOCAL) != 0); |
864 | ||
865 | if (!newline.dwDTERate) { | |
866 | newline.dwDTERate = acm->line.dwDTERate; | |
867 | newctrl &= ~ACM_CTRL_DTR; | |
6e47e069 AC |
868 | } else |
869 | newctrl |= ACM_CTRL_DTR; | |
1da177e4 LT |
870 | |
871 | if (newctrl != acm->ctrlout) | |
872 | acm_set_control(acm, acm->ctrlout = newctrl); | |
873 | ||
874 | if (memcmp(&acm->line, &newline, sizeof newline)) { | |
875 | memcpy(&acm->line, &newline, sizeof newline); | |
876 | dbg("set line: %d %d %d %d", le32_to_cpu(newline.dwDTERate), | |
877 | newline.bCharFormat, newline.bParityType, | |
878 | newline.bDataBits); | |
879 | acm_set_line(acm, &acm->line); | |
880 | } | |
881 | } | |
882 | ||
883 | /* | |
884 | * USB probe and disconnect routines. | |
885 | */ | |
886 | ||
830f4021 | 887 | /* Little helpers: write/read buffers free */ |
884b600f ON |
888 | static void acm_write_buffers_free(struct acm *acm) |
889 | { | |
890 | int i; | |
891 | struct acm_wb *wb; | |
a496c64f | 892 | struct usb_device *usb_dev = interface_to_usbdev(acm->control); |
884b600f | 893 | |
6e47e069 | 894 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) |
a496c64f | 895 | usb_buffer_free(usb_dev, acm->writesize, wb->buf, wb->dmah); |
884b600f ON |
896 | } |
897 | ||
830f4021 ON |
898 | static void acm_read_buffers_free(struct acm *acm) |
899 | { | |
900 | struct usb_device *usb_dev = interface_to_usbdev(acm->control); | |
901 | int i, n = acm->rx_buflimit; | |
902 | ||
903 | for (i = 0; i < n; i++) | |
6e47e069 AC |
904 | usb_buffer_free(usb_dev, acm->readsize, |
905 | acm->rb[i].base, acm->rb[i].dma); | |
830f4021 ON |
906 | } |
907 | ||
884b600f ON |
908 | /* Little helper: write buffers allocate */ |
909 | static int acm_write_buffers_alloc(struct acm *acm) | |
910 | { | |
911 | int i; | |
912 | struct acm_wb *wb; | |
913 | ||
86478944 | 914 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { |
884b600f ON |
915 | wb->buf = usb_buffer_alloc(acm->dev, acm->writesize, GFP_KERNEL, |
916 | &wb->dmah); | |
917 | if (!wb->buf) { | |
918 | while (i != 0) { | |
919 | --i; | |
920 | --wb; | |
921 | usb_buffer_free(acm->dev, acm->writesize, | |
922 | wb->buf, wb->dmah); | |
923 | } | |
924 | return -ENOMEM; | |
925 | } | |
926 | } | |
927 | return 0; | |
928 | } | |
929 | ||
10077d4a AC |
930 | static int acm_probe(struct usb_interface *intf, |
931 | const struct usb_device_id *id) | |
1da177e4 LT |
932 | { |
933 | struct usb_cdc_union_desc *union_header = NULL; | |
c4cabd28 | 934 | struct usb_cdc_country_functional_desc *cfd = NULL; |
c6dbf554 | 935 | unsigned char *buffer = intf->altsetting->extra; |
1da177e4 LT |
936 | int buflen = intf->altsetting->extralen; |
937 | struct usb_interface *control_interface; | |
938 | struct usb_interface *data_interface; | |
a2bfb4a3 ON |
939 | struct usb_endpoint_descriptor *epctrl = NULL; |
940 | struct usb_endpoint_descriptor *epread = NULL; | |
941 | struct usb_endpoint_descriptor *epwrite = NULL; | |
1da177e4 LT |
942 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
943 | struct acm *acm; | |
944 | int minor; | |
6e47e069 | 945 | int ctrlsize, readsize; |
1da177e4 LT |
946 | u8 *buf; |
947 | u8 ac_management_function = 0; | |
948 | u8 call_management_function = 0; | |
949 | int call_interface_num = -1; | |
950 | int data_interface_num; | |
951 | unsigned long quirks; | |
86478944 | 952 | int num_rx_buf; |
61a87adf | 953 | int i; |
a2bfb4a3 | 954 | int combined_interfaces = 0; |
1da177e4 | 955 | |
86478944 | 956 | /* normal quirks */ |
1da177e4 | 957 | quirks = (unsigned long)id->driver_info; |
86478944 ON |
958 | num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; |
959 | ||
960 | /* handle quirks deadly to normal probing*/ | |
1da177e4 LT |
961 | if (quirks == NO_UNION_NORMAL) { |
962 | data_interface = usb_ifnum_to_if(usb_dev, 1); | |
963 | control_interface = usb_ifnum_to_if(usb_dev, 0); | |
964 | goto skip_normal_probe; | |
965 | } | |
6e47e069 | 966 | |
1da177e4 LT |
967 | /* normal probing*/ |
968 | if (!buffer) { | |
9908a32e | 969 | dev_err(&intf->dev, "Weird descriptor references\n"); |
1da177e4 LT |
970 | return -EINVAL; |
971 | } | |
972 | ||
973 | if (!buflen) { | |
6e47e069 AC |
974 | if (intf->cur_altsetting->endpoint->extralen && |
975 | intf->cur_altsetting->endpoint->extra) { | |
976 | dev_dbg(&intf->dev, | |
977 | "Seeking extra descriptors on endpoint\n"); | |
1da177e4 LT |
978 | buflen = intf->cur_altsetting->endpoint->extralen; |
979 | buffer = intf->cur_altsetting->endpoint->extra; | |
980 | } else { | |
9908a32e GKH |
981 | dev_err(&intf->dev, |
982 | "Zero length descriptor references\n"); | |
1da177e4 LT |
983 | return -EINVAL; |
984 | } | |
985 | } | |
986 | ||
987 | while (buflen > 0) { | |
6e47e069 | 988 | if (buffer[1] != USB_DT_CS_INTERFACE) { |
9908a32e | 989 | dev_err(&intf->dev, "skipping garbage\n"); |
1da177e4 LT |
990 | goto next_desc; |
991 | } | |
992 | ||
6e47e069 AC |
993 | switch (buffer[2]) { |
994 | case USB_CDC_UNION_TYPE: /* we've found it */ | |
995 | if (union_header) { | |
996 | dev_err(&intf->dev, "More than one " | |
997 | "union descriptor, skipping ...\n"); | |
998 | goto next_desc; | |
1da177e4 | 999 | } |
6e47e069 AC |
1000 | union_header = (struct usb_cdc_union_desc *)buffer; |
1001 | break; | |
1002 | case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ | |
1003 | cfd = (struct usb_cdc_country_functional_desc *)buffer; | |
1004 | break; | |
1005 | case USB_CDC_HEADER_TYPE: /* maybe check version */ | |
1006 | break; /* for now we ignore it */ | |
1007 | case USB_CDC_ACM_TYPE: | |
1008 | ac_management_function = buffer[3]; | |
1009 | break; | |
1010 | case USB_CDC_CALL_MANAGEMENT_TYPE: | |
1011 | call_management_function = buffer[3]; | |
1012 | call_interface_num = buffer[4]; | |
ce126644 | 1013 | if ( (quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3) |
6e47e069 AC |
1014 | dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n"); |
1015 | break; | |
1016 | default: | |
1017 | /* there are LOTS more CDC descriptors that | |
1018 | * could legitimately be found here. | |
1019 | */ | |
1020 | dev_dbg(&intf->dev, "Ignoring descriptor: " | |
1021 | "type %02x, length %d\n", | |
1022 | buffer[2], buffer[0]); | |
1023 | break; | |
1024 | } | |
1da177e4 LT |
1025 | next_desc: |
1026 | buflen -= buffer[0]; | |
1027 | buffer += buffer[0]; | |
1028 | } | |
1029 | ||
1030 | if (!union_header) { | |
1031 | if (call_interface_num > 0) { | |
6e47e069 | 1032 | dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); |
1da177e4 LT |
1033 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); |
1034 | control_interface = intf; | |
1035 | } else { | |
a2bfb4a3 ON |
1036 | if (intf->cur_altsetting->desc.bNumEndpoints != 3) { |
1037 | dev_dbg(&intf->dev,"No union descriptor, giving up\n"); | |
1038 | return -ENODEV; | |
1039 | } else { | |
1040 | dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); | |
1041 | combined_interfaces = 1; | |
1042 | control_interface = data_interface = intf; | |
1043 | goto look_for_collapsed_interface; | |
1044 | } | |
1da177e4 LT |
1045 | } |
1046 | } else { | |
1047 | control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); | |
1048 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); | |
1049 | if (!control_interface || !data_interface) { | |
6e47e069 | 1050 | dev_dbg(&intf->dev, "no interfaces\n"); |
1da177e4 LT |
1051 | return -ENODEV; |
1052 | } | |
1053 | } | |
6e47e069 | 1054 | |
1da177e4 | 1055 | if (data_interface_num != call_interface_num) |
6e47e069 | 1056 | dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); |
1da177e4 | 1057 | |
a2bfb4a3 ON |
1058 | if (control_interface == data_interface) { |
1059 | /* some broken devices designed for windows work this way */ | |
1060 | dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); | |
1061 | combined_interfaces = 1; | |
1062 | /* a popular other OS doesn't use it */ | |
1063 | quirks |= NO_CAP_LINE; | |
1064 | if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { | |
1065 | dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); | |
1066 | return -EINVAL; | |
1067 | } | |
1068 | look_for_collapsed_interface: | |
1069 | for (i = 0; i < 3; i++) { | |
1070 | struct usb_endpoint_descriptor *ep; | |
1071 | ep = &data_interface->cur_altsetting->endpoint[i].desc; | |
1072 | ||
1073 | if (usb_endpoint_is_int_in(ep)) | |
1074 | epctrl = ep; | |
1075 | else if (usb_endpoint_is_bulk_out(ep)) | |
1076 | epwrite = ep; | |
1077 | else if (usb_endpoint_is_bulk_in(ep)) | |
1078 | epread = ep; | |
1079 | else | |
1080 | return -EINVAL; | |
1081 | } | |
1082 | if (!epctrl || !epread || !epwrite) | |
1083 | return -ENODEV; | |
1084 | else | |
1085 | goto made_compressed_probe; | |
1086 | } | |
1087 | ||
1da177e4 LT |
1088 | skip_normal_probe: |
1089 | ||
1090 | /*workaround for switched interfaces */ | |
6e47e069 AC |
1091 | if (data_interface->cur_altsetting->desc.bInterfaceClass |
1092 | != CDC_DATA_INTERFACE_TYPE) { | |
1093 | if (control_interface->cur_altsetting->desc.bInterfaceClass | |
1094 | == CDC_DATA_INTERFACE_TYPE) { | |
1da177e4 | 1095 | struct usb_interface *t; |
6e47e069 AC |
1096 | dev_dbg(&intf->dev, |
1097 | "Your device has switched interfaces.\n"); | |
1da177e4 LT |
1098 | t = control_interface; |
1099 | control_interface = data_interface; | |
1100 | data_interface = t; | |
1101 | } else { | |
1102 | return -EINVAL; | |
1103 | } | |
1104 | } | |
74da5d68 AS |
1105 | |
1106 | /* Accept probe requests only for the control interface */ | |
a2bfb4a3 | 1107 | if (!combined_interfaces && intf != control_interface) |
74da5d68 | 1108 | return -ENODEV; |
6e47e069 | 1109 | |
a2bfb4a3 ON |
1110 | if (!combined_interfaces && usb_interface_claimed(data_interface)) { |
1111 | /* valid in this context */ | |
6e47e069 | 1112 | dev_dbg(&intf->dev, "The data interface isn't available\n"); |
1da177e4 LT |
1113 | return -EBUSY; |
1114 | } | |
1115 | ||
1116 | ||
1117 | if (data_interface->cur_altsetting->desc.bNumEndpoints < 2) | |
1118 | return -EINVAL; | |
1119 | ||
1120 | epctrl = &control_interface->cur_altsetting->endpoint[0].desc; | |
1121 | epread = &data_interface->cur_altsetting->endpoint[0].desc; | |
1122 | epwrite = &data_interface->cur_altsetting->endpoint[1].desc; | |
1123 | ||
1124 | ||
1125 | /* workaround for switched endpoints */ | |
45aea704 | 1126 | if (!usb_endpoint_dir_in(epread)) { |
1da177e4 LT |
1127 | /* descriptors are swapped */ |
1128 | struct usb_endpoint_descriptor *t; | |
6e47e069 AC |
1129 | dev_dbg(&intf->dev, |
1130 | "The data interface has switched endpoints\n"); | |
1da177e4 LT |
1131 | t = epread; |
1132 | epread = epwrite; | |
1133 | epwrite = t; | |
1134 | } | |
a2bfb4a3 | 1135 | made_compressed_probe: |
1da177e4 LT |
1136 | dbg("interfaces are valid"); |
1137 | for (minor = 0; minor < ACM_TTY_MINORS && acm_table[minor]; minor++); | |
1138 | ||
1139 | if (minor == ACM_TTY_MINORS) { | |
9908a32e | 1140 | dev_err(&intf->dev, "no more free acm devices\n"); |
1da177e4 LT |
1141 | return -ENODEV; |
1142 | } | |
1143 | ||
6e47e069 AC |
1144 | acm = kzalloc(sizeof(struct acm), GFP_KERNEL); |
1145 | if (acm == NULL) { | |
898eb71c | 1146 | dev_dbg(&intf->dev, "out of memory (acm kzalloc)\n"); |
1da177e4 LT |
1147 | goto alloc_fail; |
1148 | } | |
1da177e4 LT |
1149 | |
1150 | ctrlsize = le16_to_cpu(epctrl->wMaxPacketSize); | |
6e47e069 AC |
1151 | readsize = le16_to_cpu(epread->wMaxPacketSize) * |
1152 | (quirks == SINGLE_RX_URB ? 1 : 2); | |
a2bfb4a3 | 1153 | acm->combined_interfaces = combined_interfaces; |
e4cf3aa8 | 1154 | acm->writesize = le16_to_cpu(epwrite->wMaxPacketSize) * 20; |
1da177e4 LT |
1155 | acm->control = control_interface; |
1156 | acm->data = data_interface; | |
1157 | acm->minor = minor; | |
1158 | acm->dev = usb_dev; | |
1159 | acm->ctrl_caps = ac_management_function; | |
a2bfb4a3 ON |
1160 | if (quirks & NO_CAP_LINE) |
1161 | acm->ctrl_caps &= ~USB_CDC_CAP_LINE; | |
1da177e4 LT |
1162 | acm->ctrlsize = ctrlsize; |
1163 | acm->readsize = readsize; | |
86478944 | 1164 | acm->rx_buflimit = num_rx_buf; |
61a87adf DK |
1165 | acm->urb_task.func = acm_rx_tasklet; |
1166 | acm->urb_task.data = (unsigned long) acm; | |
c4028958 | 1167 | INIT_WORK(&acm->work, acm_softint); |
e5fbab51 | 1168 | init_waitqueue_head(&acm->drain_wait); |
1da177e4 | 1169 | spin_lock_init(&acm->throttle_lock); |
884b600f | 1170 | spin_lock_init(&acm->write_lock); |
61a87adf | 1171 | spin_lock_init(&acm->read_lock); |
1365baf7 | 1172 | mutex_init(&acm->mutex); |
61a87adf | 1173 | acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); |
cf7fdd57 ON |
1174 | acm->is_int_ep = usb_endpoint_xfer_int(epread); |
1175 | if (acm->is_int_ep) | |
1176 | acm->bInterval = epread->bInterval; | |
739e0285 AC |
1177 | tty_port_init(&acm->port); |
1178 | acm->port.ops = &acm_port_ops; | |
1da177e4 LT |
1179 | |
1180 | buf = usb_buffer_alloc(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); | |
1181 | if (!buf) { | |
898eb71c | 1182 | dev_dbg(&intf->dev, "out of memory (ctrl buffer alloc)\n"); |
1da177e4 LT |
1183 | goto alloc_fail2; |
1184 | } | |
1185 | acm->ctrl_buffer = buf; | |
1186 | ||
884b600f | 1187 | if (acm_write_buffers_alloc(acm) < 0) { |
898eb71c | 1188 | dev_dbg(&intf->dev, "out of memory (write buffer alloc)\n"); |
1da177e4 LT |
1189 | goto alloc_fail4; |
1190 | } | |
1da177e4 LT |
1191 | |
1192 | acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); | |
1193 | if (!acm->ctrlurb) { | |
898eb71c | 1194 | dev_dbg(&intf->dev, "out of memory (ctrlurb kmalloc)\n"); |
1da177e4 LT |
1195 | goto alloc_fail5; |
1196 | } | |
86478944 | 1197 | for (i = 0; i < num_rx_buf; i++) { |
61a87adf DK |
1198 | struct acm_ru *rcv = &(acm->ru[i]); |
1199 | ||
6e47e069 AC |
1200 | rcv->urb = usb_alloc_urb(0, GFP_KERNEL); |
1201 | if (rcv->urb == NULL) { | |
1202 | dev_dbg(&intf->dev, | |
1203 | "out of memory (read urbs usb_alloc_urb)\n"); | |
61a87adf DK |
1204 | goto alloc_fail7; |
1205 | } | |
1206 | ||
1207 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1208 | rcv->instance = acm; | |
1209 | } | |
86478944 | 1210 | for (i = 0; i < num_rx_buf; i++) { |
672c4e18 | 1211 | struct acm_rb *rb = &(acm->rb[i]); |
61a87adf | 1212 | |
672c4e18 DB |
1213 | rb->base = usb_buffer_alloc(acm->dev, readsize, |
1214 | GFP_KERNEL, &rb->dma); | |
1215 | if (!rb->base) { | |
6e47e069 AC |
1216 | dev_dbg(&intf->dev, |
1217 | "out of memory (read bufs usb_buffer_alloc)\n"); | |
61a87adf DK |
1218 | goto alloc_fail7; |
1219 | } | |
1da177e4 | 1220 | } |
6e47e069 | 1221 | for (i = 0; i < ACM_NW; i++) { |
e4cf3aa8 DE |
1222 | struct acm_wb *snd = &(acm->wb[i]); |
1223 | ||
6e47e069 AC |
1224 | snd->urb = usb_alloc_urb(0, GFP_KERNEL); |
1225 | if (snd->urb == NULL) { | |
1226 | dev_dbg(&intf->dev, | |
1227 | "out of memory (write urbs usb_alloc_urb)"); | |
e4cf3aa8 DE |
1228 | goto alloc_fail7; |
1229 | } | |
1230 | ||
5186ffee AL |
1231 | if (usb_endpoint_xfer_int(epwrite)) |
1232 | usb_fill_int_urb(snd->urb, usb_dev, | |
1233 | usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), | |
1234 | NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); | |
1235 | else | |
1236 | usb_fill_bulk_urb(snd->urb, usb_dev, | |
1237 | usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), | |
1238 | NULL, acm->writesize, acm_write_bulk, snd); | |
e4cf3aa8 DE |
1239 | snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
1240 | snd->instance = acm; | |
1da177e4 LT |
1241 | } |
1242 | ||
6e47e069 | 1243 | usb_set_intfdata(intf, acm); |
c4cabd28 ON |
1244 | |
1245 | i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); | |
1246 | if (i < 0) | |
1247 | goto alloc_fail8; | |
1248 | ||
1249 | if (cfd) { /* export the country data */ | |
1250 | acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); | |
1251 | if (!acm->country_codes) | |
1252 | goto skip_countries; | |
1253 | acm->country_code_size = cfd->bLength - 4; | |
6e47e069 AC |
1254 | memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, |
1255 | cfd->bLength - 4); | |
c4cabd28 ON |
1256 | acm->country_rel_date = cfd->iCountryCodeRelDate; |
1257 | ||
1258 | i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); | |
1259 | if (i < 0) { | |
1260 | kfree(acm->country_codes); | |
1261 | goto skip_countries; | |
1262 | } | |
1263 | ||
6e47e069 AC |
1264 | i = device_create_file(&intf->dev, |
1265 | &dev_attr_iCountryCodeRelDate); | |
c4cabd28 ON |
1266 | if (i < 0) { |
1267 | kfree(acm->country_codes); | |
1268 | goto skip_countries; | |
1269 | } | |
1270 | } | |
1271 | ||
1272 | skip_countries: | |
6e47e069 | 1273 | usb_fill_int_urb(acm->ctrlurb, usb_dev, |
a2bfb4a3 ON |
1274 | usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), |
1275 | acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, | |
1276 | /* works around buggy devices */ | |
1277 | epctrl->bInterval ? epctrl->bInterval : 0xff); | |
1da177e4 LT |
1278 | acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
1279 | acm->ctrlurb->transfer_dma = acm->ctrl_dma; | |
1280 | ||
1da177e4 LT |
1281 | dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); |
1282 | ||
1283 | acm_set_control(acm, acm->ctrlout); | |
1284 | ||
1285 | acm->line.dwDTERate = cpu_to_le32(9600); | |
1286 | acm->line.bDataBits = 8; | |
1287 | acm_set_line(acm, &acm->line); | |
1288 | ||
1289 | usb_driver_claim_interface(&acm_driver, data_interface, acm); | |
672c4e18 | 1290 | usb_set_intfdata(data_interface, acm); |
1da177e4 | 1291 | |
83ef344a | 1292 | usb_get_intf(control_interface); |
1293 | tty_register_device(acm_tty_driver, minor, &control_interface->dev); | |
1da177e4 LT |
1294 | |
1295 | acm_table[minor] = acm; | |
1da177e4 | 1296 | |
c4cabd28 ON |
1297 | return 0; |
1298 | alloc_fail8: | |
e4cf3aa8 DE |
1299 | for (i = 0; i < ACM_NW; i++) |
1300 | usb_free_urb(acm->wb[i].urb); | |
1da177e4 | 1301 | alloc_fail7: |
830f4021 | 1302 | acm_read_buffers_free(acm); |
86478944 | 1303 | for (i = 0; i < num_rx_buf; i++) |
61a87adf | 1304 | usb_free_urb(acm->ru[i].urb); |
1da177e4 LT |
1305 | usb_free_urb(acm->ctrlurb); |
1306 | alloc_fail5: | |
884b600f | 1307 | acm_write_buffers_free(acm); |
1da177e4 | 1308 | alloc_fail4: |
1da177e4 LT |
1309 | usb_buffer_free(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); |
1310 | alloc_fail2: | |
1311 | kfree(acm); | |
1312 | alloc_fail: | |
1313 | return -ENOMEM; | |
1314 | } | |
1315 | ||
1365baf7 ON |
1316 | static void stop_data_traffic(struct acm *acm) |
1317 | { | |
1318 | int i; | |
11ea859d | 1319 | dbg("Entering stop_data_traffic"); |
1365baf7 ON |
1320 | |
1321 | tasklet_disable(&acm->urb_task); | |
1322 | ||
1323 | usb_kill_urb(acm->ctrlurb); | |
6e47e069 | 1324 | for (i = 0; i < ACM_NW; i++) |
e4cf3aa8 | 1325 | usb_kill_urb(acm->wb[i].urb); |
1365baf7 ON |
1326 | for (i = 0; i < acm->rx_buflimit; i++) |
1327 | usb_kill_urb(acm->ru[i].urb); | |
1328 | ||
1365baf7 ON |
1329 | tasklet_enable(&acm->urb_task); |
1330 | ||
1331 | cancel_work_sync(&acm->work); | |
1332 | } | |
1333 | ||
1da177e4 LT |
1334 | static void acm_disconnect(struct usb_interface *intf) |
1335 | { | |
c4cabd28 | 1336 | struct acm *acm = usb_get_intfdata(intf); |
1da177e4 | 1337 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
10077d4a | 1338 | struct tty_struct *tty; |
1da177e4 | 1339 | |
672c4e18 DB |
1340 | /* sibling interface is already cleaning up */ |
1341 | if (!acm) | |
86067eea | 1342 | return; |
672c4e18 DB |
1343 | |
1344 | mutex_lock(&open_mutex); | |
6e47e069 | 1345 | if (acm->country_codes) { |
74da5d68 AS |
1346 | device_remove_file(&acm->control->dev, |
1347 | &dev_attr_wCountryCodes); | |
1348 | device_remove_file(&acm->control->dev, | |
1349 | &dev_attr_iCountryCodeRelDate); | |
c4cabd28 | 1350 | } |
74da5d68 | 1351 | device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); |
1da177e4 | 1352 | acm->dev = NULL; |
86067eea ON |
1353 | usb_set_intfdata(acm->control, NULL); |
1354 | usb_set_intfdata(acm->data, NULL); | |
1da177e4 | 1355 | |
1365baf7 | 1356 | stop_data_traffic(acm); |
1da177e4 | 1357 | |
884b600f | 1358 | acm_write_buffers_free(acm); |
6e47e069 AC |
1359 | usb_buffer_free(usb_dev, acm->ctrlsize, acm->ctrl_buffer, |
1360 | acm->ctrl_dma); | |
830f4021 | 1361 | acm_read_buffers_free(acm); |
1da177e4 | 1362 | |
a2bfb4a3 ON |
1363 | if (!acm->combined_interfaces) |
1364 | usb_driver_release_interface(&acm_driver, intf == acm->control ? | |
830f4021 | 1365 | acm->data : acm->control); |
1da177e4 | 1366 | |
10077d4a | 1367 | if (acm->port.count == 0) { |
83ef344a | 1368 | acm_tty_unregister(acm); |
4186ecf8 | 1369 | mutex_unlock(&open_mutex); |
1da177e4 LT |
1370 | return; |
1371 | } | |
1372 | ||
4186ecf8 | 1373 | mutex_unlock(&open_mutex); |
10077d4a AC |
1374 | tty = tty_port_tty_get(&acm->port); |
1375 | if (tty) { | |
1376 | tty_hangup(tty); | |
1377 | tty_kref_put(tty); | |
1378 | } | |
1da177e4 LT |
1379 | } |
1380 | ||
35758589 | 1381 | #ifdef CONFIG_PM |
1365baf7 ON |
1382 | static int acm_suspend(struct usb_interface *intf, pm_message_t message) |
1383 | { | |
1384 | struct acm *acm = usb_get_intfdata(intf); | |
11ea859d ON |
1385 | int cnt; |
1386 | ||
65bfd296 | 1387 | if (message.event & PM_EVENT_AUTO) { |
11ea859d ON |
1388 | int b; |
1389 | ||
1390 | spin_lock_irq(&acm->read_lock); | |
1391 | spin_lock(&acm->write_lock); | |
1392 | b = acm->processing + acm->transmitting; | |
1393 | spin_unlock(&acm->write_lock); | |
1394 | spin_unlock_irq(&acm->read_lock); | |
1395 | if (b) | |
1396 | return -EBUSY; | |
1397 | } | |
1398 | ||
1399 | spin_lock_irq(&acm->read_lock); | |
1400 | spin_lock(&acm->write_lock); | |
1401 | cnt = acm->susp_count++; | |
1402 | spin_unlock(&acm->write_lock); | |
1403 | spin_unlock_irq(&acm->read_lock); | |
1365baf7 | 1404 | |
11ea859d | 1405 | if (cnt) |
1365baf7 ON |
1406 | return 0; |
1407 | /* | |
1408 | we treat opened interfaces differently, | |
1409 | we must guard against open | |
1410 | */ | |
1411 | mutex_lock(&acm->mutex); | |
1412 | ||
10077d4a | 1413 | if (acm->port.count) |
1365baf7 ON |
1414 | stop_data_traffic(acm); |
1415 | ||
1416 | mutex_unlock(&acm->mutex); | |
1417 | return 0; | |
1418 | } | |
1419 | ||
1420 | static int acm_resume(struct usb_interface *intf) | |
1421 | { | |
1422 | struct acm *acm = usb_get_intfdata(intf); | |
97d35f95 | 1423 | struct acm_wb *wb; |
1365baf7 | 1424 | int rv = 0; |
11ea859d | 1425 | int cnt; |
1365baf7 | 1426 | |
11ea859d ON |
1427 | spin_lock_irq(&acm->read_lock); |
1428 | acm->susp_count -= 1; | |
1429 | cnt = acm->susp_count; | |
1430 | spin_unlock_irq(&acm->read_lock); | |
1431 | ||
1432 | if (cnt) | |
1365baf7 ON |
1433 | return 0; |
1434 | ||
1435 | mutex_lock(&acm->mutex); | |
10077d4a | 1436 | if (acm->port.count) { |
1365baf7 | 1437 | rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO); |
97d35f95 ON |
1438 | |
1439 | spin_lock_irq(&acm->write_lock); | |
1440 | if (acm->delayed_wb) { | |
1441 | wb = acm->delayed_wb; | |
1442 | acm->delayed_wb = NULL; | |
1443 | spin_unlock_irq(&acm->write_lock); | |
f0730924 | 1444 | acm_start_wb(acm, wb); |
97d35f95 ON |
1445 | } else { |
1446 | spin_unlock_irq(&acm->write_lock); | |
1447 | } | |
1448 | ||
1449 | /* | |
1450 | * delayed error checking because we must | |
1451 | * do the write path at all cost | |
1452 | */ | |
1365baf7 | 1453 | if (rv < 0) |
11ea859d | 1454 | goto err_out; |
1365baf7 ON |
1455 | |
1456 | tasklet_schedule(&acm->urb_task); | |
1457 | } | |
1458 | ||
1459 | err_out: | |
1460 | mutex_unlock(&acm->mutex); | |
1461 | return rv; | |
1462 | } | |
35758589 | 1463 | |
a91b0c50 FL |
1464 | static int acm_reset_resume(struct usb_interface *intf) |
1465 | { | |
1466 | struct acm *acm = usb_get_intfdata(intf); | |
1467 | struct tty_struct *tty; | |
1468 | ||
1469 | mutex_lock(&acm->mutex); | |
1470 | if (acm->port.count) { | |
1471 | tty = tty_port_tty_get(&acm->port); | |
1472 | if (tty) { | |
1473 | tty_hangup(tty); | |
1474 | tty_kref_put(tty); | |
1475 | } | |
1476 | } | |
1477 | mutex_unlock(&acm->mutex); | |
1478 | return acm_resume(intf); | |
1479 | } | |
1480 | ||
35758589 | 1481 | #endif /* CONFIG_PM */ |
c1479a92 AT |
1482 | |
1483 | #define NOKIA_PCSUITE_ACM_INFO(x) \ | |
1484 | USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ | |
1485 | USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ | |
1486 | USB_CDC_ACM_PROTO_VENDOR) | |
1487 | ||
1da177e4 LT |
1488 | /* |
1489 | * USB driver structure. | |
1490 | */ | |
1491 | ||
6ef4852b | 1492 | static const struct usb_device_id acm_ids[] = { |
1da177e4 LT |
1493 | /* quirky and broken devices */ |
1494 | { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ | |
1495 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1496 | }, | |
b0e2a705 AA |
1497 | { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ |
1498 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1499 | }, | |
0f9c7b4a AL |
1500 | { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ |
1501 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1502 | }, | |
8753e65e MO |
1503 | { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ |
1504 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1505 | }, | |
91a9c921 CM |
1506 | { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ |
1507 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1508 | }, | |
7abcf20b AC |
1509 | { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ |
1510 | .driver_info = SINGLE_RX_URB, | |
1511 | }, | |
86478944 ON |
1512 | { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ |
1513 | .driver_info = SINGLE_RX_URB, /* firmware bug */ | |
1514 | }, | |
3dd2ae81 ON |
1515 | { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ |
1516 | .driver_info = SINGLE_RX_URB, /* firmware bug */ | |
1517 | }, | |
9be8456c ON |
1518 | { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ |
1519 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1520 | }, | |
6149ed5e IM |
1521 | { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ |
1522 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1523 | }, | |
c8fd2c37 ES |
1524 | { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ |
1525 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1526 | }, | |
c89c60e9 AC |
1527 | { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ |
1528 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1529 | }, | |
cab98a0a XK |
1530 | { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ |
1531 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1532 | }, | |
155df65a DT |
1533 | { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ |
1534 | }, | |
c332b4e1 AR |
1535 | { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ |
1536 | .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on | |
1537 | data interface instead of | |
1538 | communications interface. | |
1539 | Maybe we should define a new | |
1540 | quirk for this. */ | |
1541 | }, | |
1f17c502 KK |
1542 | { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ |
1543 | .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ | |
1544 | }, | |
9be8456c | 1545 | |
c1479a92 AT |
1546 | /* Nokia S60 phones expose two ACM channels. The first is |
1547 | * a modem and is picked up by the standard AT-command | |
1548 | * information below. The second is 'vendor-specific' but | |
1549 | * is treated as a serial device at the S60 end, so we want | |
1550 | * to expose it on Linux too. */ | |
1551 | { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ | |
1552 | { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ | |
1553 | { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ | |
1554 | { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ | |
1555 | { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ | |
1556 | { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ | |
1557 | { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ | |
1558 | { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ | |
1559 | { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ | |
1560 | { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ | |
1561 | { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ | |
1562 | { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ | |
1563 | { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ | |
1564 | { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ | |
1565 | { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ | |
1566 | { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ | |
1567 | { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ | |
1568 | { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ | |
1569 | { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ | |
1570 | { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ | |
1571 | { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ | |
1572 | { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ | |
1573 | { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ | |
1574 | { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ | |
1575 | { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ | |
1576 | { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ | |
1577 | { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ | |
1578 | { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ | |
1579 | { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ | |
1580 | { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ | |
1581 | { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ | |
1582 | { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ | |
1583 | { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ | |
1584 | { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ | |
1585 | { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ | |
1586 | { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ | |
1587 | { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ | |
1588 | { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ | |
1589 | { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ | |
1590 | { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ | |
1591 | { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ | |
1592 | { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ | |
1593 | { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ | |
1594 | ||
1595 | /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ | |
1596 | ||
7c5d8c39 | 1597 | /* Support Lego NXT using pbLua firmware */ |
ce126644 JC |
1598 | { USB_DEVICE(0x0694, 0xff00), |
1599 | .driver_info = NOT_A_MODEM, | |
1600 | }, | |
7c5d8c39 | 1601 | |
1da177e4 LT |
1602 | /* control interfaces with various AT-command sets */ |
1603 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1604 | USB_CDC_ACM_PROTO_AT_V25TER) }, | |
1605 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1606 | USB_CDC_ACM_PROTO_AT_PCCA101) }, | |
1607 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1608 | USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, | |
1609 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1610 | USB_CDC_ACM_PROTO_AT_GSM) }, | |
1611 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
6e47e069 | 1612 | USB_CDC_ACM_PROTO_AT_3G) }, |
1da177e4 LT |
1613 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
1614 | USB_CDC_ACM_PROTO_AT_CDMA) }, | |
1615 | ||
1da177e4 LT |
1616 | { } |
1617 | }; | |
1618 | ||
6e47e069 | 1619 | MODULE_DEVICE_TABLE(usb, acm_ids); |
1da177e4 LT |
1620 | |
1621 | static struct usb_driver acm_driver = { | |
1da177e4 LT |
1622 | .name = "cdc_acm", |
1623 | .probe = acm_probe, | |
1624 | .disconnect = acm_disconnect, | |
35758589 | 1625 | #ifdef CONFIG_PM |
1365baf7 ON |
1626 | .suspend = acm_suspend, |
1627 | .resume = acm_resume, | |
a91b0c50 | 1628 | .reset_resume = acm_reset_resume, |
35758589 | 1629 | #endif |
1da177e4 | 1630 | .id_table = acm_ids, |
35758589 | 1631 | #ifdef CONFIG_PM |
1365baf7 | 1632 | .supports_autosuspend = 1, |
35758589 | 1633 | #endif |
1da177e4 LT |
1634 | }; |
1635 | ||
1636 | /* | |
1637 | * TTY driver structures. | |
1638 | */ | |
1639 | ||
b68e31d0 | 1640 | static const struct tty_operations acm_ops = { |
1da177e4 LT |
1641 | .open = acm_tty_open, |
1642 | .close = acm_tty_close, | |
10077d4a | 1643 | .hangup = acm_tty_hangup, |
1da177e4 LT |
1644 | .write = acm_tty_write, |
1645 | .write_room = acm_tty_write_room, | |
1646 | .ioctl = acm_tty_ioctl, | |
1647 | .throttle = acm_tty_throttle, | |
1648 | .unthrottle = acm_tty_unthrottle, | |
1649 | .chars_in_buffer = acm_tty_chars_in_buffer, | |
1650 | .break_ctl = acm_tty_break_ctl, | |
1651 | .set_termios = acm_tty_set_termios, | |
1652 | .tiocmget = acm_tty_tiocmget, | |
1653 | .tiocmset = acm_tty_tiocmset, | |
1654 | }; | |
1655 | ||
1656 | /* | |
1657 | * Init / exit. | |
1658 | */ | |
1659 | ||
1660 | static int __init acm_init(void) | |
1661 | { | |
1662 | int retval; | |
1663 | acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); | |
1664 | if (!acm_tty_driver) | |
1665 | return -ENOMEM; | |
1666 | acm_tty_driver->owner = THIS_MODULE, | |
1667 | acm_tty_driver->driver_name = "acm", | |
1668 | acm_tty_driver->name = "ttyACM", | |
1da177e4 LT |
1669 | acm_tty_driver->major = ACM_TTY_MAJOR, |
1670 | acm_tty_driver->minor_start = 0, | |
1671 | acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, | |
1672 | acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, | |
331b8319 | 1673 | acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
1da177e4 | 1674 | acm_tty_driver->init_termios = tty_std_termios; |
6e47e069 AC |
1675 | acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | |
1676 | HUPCL | CLOCAL; | |
1da177e4 LT |
1677 | tty_set_operations(acm_tty_driver, &acm_ops); |
1678 | ||
1679 | retval = tty_register_driver(acm_tty_driver); | |
1680 | if (retval) { | |
1681 | put_tty_driver(acm_tty_driver); | |
1682 | return retval; | |
1683 | } | |
1684 | ||
1685 | retval = usb_register(&acm_driver); | |
1686 | if (retval) { | |
1687 | tty_unregister_driver(acm_tty_driver); | |
1688 | put_tty_driver(acm_tty_driver); | |
1689 | return retval; | |
1690 | } | |
1691 | ||
5909f6ea GKH |
1692 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
1693 | DRIVER_DESC "\n"); | |
1da177e4 LT |
1694 | |
1695 | return 0; | |
1696 | } | |
1697 | ||
1698 | static void __exit acm_exit(void) | |
1699 | { | |
1700 | usb_deregister(&acm_driver); | |
1701 | tty_unregister_driver(acm_tty_driver); | |
1702 | put_tty_driver(acm_tty_driver); | |
1703 | } | |
1704 | ||
1705 | module_init(acm_init); | |
1706 | module_exit(acm_exit); | |
1707 | ||
6e47e069 AC |
1708 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1709 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 | 1710 | MODULE_LICENSE("GPL"); |
e766aeb8 | 1711 | MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); |