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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * cdc-acm.c | |
3 | * | |
4 | * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> | |
a2531293 | 5 | * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz> |
1da177e4 LT |
6 | * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com> |
7 | * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> | |
8 | * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name> | |
61a87adf | 9 | * Copyright (c) 2005 David Kubicek <dave@awk.cz> |
1da177e4 LT |
10 | * |
11 | * USB Abstract Control Model driver for USB modems and ISDN adapters | |
12 | * | |
13 | * Sponsored by SuSE | |
14 | * | |
15 | * ChangeLog: | |
16 | * v0.9 - thorough cleaning, URBification, almost a rewrite | |
17 | * v0.10 - some more cleanups | |
18 | * v0.11 - fixed flow control, read error doesn't stop reads | |
6e47e069 AC |
19 | * v0.12 - added TIOCM ioctls, added break handling, made struct acm |
20 | * kmalloced | |
1da177e4 LT |
21 | * v0.13 - added termios, added hangup |
22 | * v0.14 - sized down struct acm | |
23 | * v0.15 - fixed flow control again - characters could be lost | |
24 | * v0.16 - added code for modems with swapped data and control interfaces | |
25 | * v0.17 - added new style probing | |
26 | * v0.18 - fixed new style probing for devices with more configurations | |
27 | * v0.19 - fixed CLOCAL handling (thanks to Richard Shih-Ping Chan) | |
28 | * v0.20 - switched to probing on interface (rather than device) class | |
29 | * v0.21 - revert to probing on device for devices with multiple configs | |
30 | * v0.22 - probe only the control interface. if usbcore doesn't choose the | |
31 | * config we want, sysadmin changes bConfigurationValue in sysfs. | |
32 | * v0.23 - use softirq for rx processing, as needed by tty layer | |
33 | * v0.24 - change probe method to evaluate CDC union descriptor | |
61a87adf | 34 | * v0.25 - downstream tasks paralelized to maximize throughput |
e4cf3aa8 | 35 | * v0.26 - multiple write urbs, writesize increased |
1da177e4 LT |
36 | */ |
37 | ||
38 | /* | |
39 | * This program is free software; you can redistribute it and/or modify | |
40 | * it under the terms of the GNU General Public License as published by | |
41 | * the Free Software Foundation; either version 2 of the License, or | |
42 | * (at your option) any later version. | |
43 | * | |
44 | * This program is distributed in the hope that it will be useful, | |
45 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
46 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
47 | * GNU General Public License for more details. | |
48 | * | |
49 | * You should have received a copy of the GNU General Public License | |
50 | * along with this program; if not, write to the Free Software | |
51 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
52 | */ | |
53 | ||
54 | #undef DEBUG | |
e5fbab51 | 55 | #undef VERBOSE_DEBUG |
1da177e4 LT |
56 | |
57 | #include <linux/kernel.h> | |
58 | #include <linux/errno.h> | |
59 | #include <linux/init.h> | |
60 | #include <linux/slab.h> | |
61 | #include <linux/tty.h> | |
7af25b4b | 62 | #include <linux/serial.h> |
1da177e4 LT |
63 | #include <linux/tty_driver.h> |
64 | #include <linux/tty_flip.h> | |
65 | #include <linux/module.h> | |
4186ecf8 | 66 | #include <linux/mutex.h> |
10077d4a | 67 | #include <linux/uaccess.h> |
1da177e4 | 68 | #include <linux/usb.h> |
a8c28f23 | 69 | #include <linux/usb/cdc.h> |
1da177e4 LT |
70 | #include <asm/byteorder.h> |
71 | #include <asm/unaligned.h> | |
61a87adf | 72 | #include <linux/list.h> |
1da177e4 LT |
73 | |
74 | #include "cdc-acm.h" | |
75 | ||
e5fbab51 DB |
76 | |
77 | #define ACM_CLOSE_TIMEOUT 15 /* seconds to let writes drain */ | |
78 | ||
1da177e4 LT |
79 | /* |
80 | * Version Information | |
81 | */ | |
e4cf3aa8 | 82 | #define DRIVER_VERSION "v0.26" |
61a87adf | 83 | #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek" |
1da177e4 LT |
84 | #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" |
85 | ||
86 | static struct usb_driver acm_driver; | |
87 | static struct tty_driver *acm_tty_driver; | |
88 | static struct acm *acm_table[ACM_TTY_MINORS]; | |
89 | ||
4186ecf8 | 90 | static DEFINE_MUTEX(open_mutex); |
1da177e4 | 91 | |
10077d4a | 92 | #define ACM_READY(acm) (acm && acm->dev && acm->port.count) |
1da177e4 | 93 | |
739e0285 AC |
94 | static const struct tty_port_operations acm_port_ops = { |
95 | }; | |
96 | ||
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 | ||
7e7797e7 JH |
300 | usb_mark_last_busy(acm->dev); |
301 | ||
1da177e4 LT |
302 | data = (unsigned char *)(dr + 1); |
303 | switch (dr->bNotificationType) { | |
6e47e069 AC |
304 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: |
305 | dbg("%s network", dr->wValue ? | |
306 | "connected to" : "disconnected from"); | |
307 | break; | |
1da177e4 | 308 | |
6e47e069 AC |
309 | case USB_CDC_NOTIFY_SERIAL_STATE: |
310 | tty = tty_port_tty_get(&acm->port); | |
311 | newctrl = get_unaligned_le16(data); | |
1da177e4 | 312 | |
6e47e069 AC |
313 | if (tty) { |
314 | if (!acm->clocal && | |
315 | (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { | |
316 | dbg("calling hangup"); | |
317 | tty_hangup(tty); | |
1da177e4 | 318 | } |
6e47e069 AC |
319 | tty_kref_put(tty); |
320 | } | |
1da177e4 | 321 | |
6e47e069 | 322 | acm->ctrlin = newctrl; |
1da177e4 | 323 | |
6e47e069 AC |
324 | dbg("input control lines: dcd%c dsr%c break%c ring%c framing%c parity%c overrun%c", |
325 | acm->ctrlin & ACM_CTRL_DCD ? '+' : '-', | |
326 | acm->ctrlin & ACM_CTRL_DSR ? '+' : '-', | |
327 | acm->ctrlin & ACM_CTRL_BRK ? '+' : '-', | |
328 | acm->ctrlin & ACM_CTRL_RI ? '+' : '-', | |
329 | acm->ctrlin & ACM_CTRL_FRAMING ? '+' : '-', | |
330 | acm->ctrlin & ACM_CTRL_PARITY ? '+' : '-', | |
331 | acm->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-'); | |
1da177e4 LT |
332 | break; |
333 | ||
6e47e069 AC |
334 | default: |
335 | dbg("unknown notification %d received: index %d len %d data0 %d data1 %d", | |
336 | dr->bNotificationType, dr->wIndex, | |
337 | dr->wLength, data[0], data[1]); | |
338 | break; | |
1da177e4 LT |
339 | } |
340 | exit: | |
6e47e069 | 341 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
185d4058 | 342 | if (retval) |
9908a32e | 343 | dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with " |
59d7fec7 | 344 | "result %d\n", __func__, retval); |
1da177e4 LT |
345 | } |
346 | ||
347 | /* data interface returns incoming bytes, or we got unthrottled */ | |
7d12e780 | 348 | static void acm_read_bulk(struct urb *urb) |
1da177e4 | 349 | { |
61a87adf DK |
350 | struct acm_rb *buf; |
351 | struct acm_ru *rcv = urb->context; | |
352 | struct acm *acm = rcv->instance; | |
86478944 | 353 | int status = urb->status; |
185d4058 GKH |
354 | |
355 | dbg("Entering acm_read_bulk with status %d", status); | |
1da177e4 | 356 | |
11ea859d | 357 | if (!ACM_READY(acm)) { |
59d7fec7 | 358 | dev_dbg(&acm->data->dev, "Aborting, acm not ready\n"); |
1da177e4 | 359 | return; |
11ea859d ON |
360 | } |
361 | usb_mark_last_busy(acm->dev); | |
1da177e4 | 362 | |
86478944 | 363 | if (status) |
898eb71c | 364 | dev_dbg(&acm->data->dev, "bulk rx status %d\n", status); |
1da177e4 | 365 | |
61a87adf DK |
366 | buf = rcv->buffer; |
367 | buf->size = urb->actual_length; | |
368 | ||
86478944 ON |
369 | if (likely(status == 0)) { |
370 | spin_lock(&acm->read_lock); | |
11ea859d | 371 | acm->processing++; |
86478944 ON |
372 | list_add_tail(&rcv->list, &acm->spare_read_urbs); |
373 | list_add_tail(&buf->list, &acm->filled_read_bufs); | |
374 | spin_unlock(&acm->read_lock); | |
375 | } else { | |
376 | /* we drop the buffer due to an error */ | |
377 | spin_lock(&acm->read_lock); | |
378 | list_add_tail(&rcv->list, &acm->spare_read_urbs); | |
379 | list_add(&buf->list, &acm->spare_read_bufs); | |
380 | spin_unlock(&acm->read_lock); | |
381 | /* nevertheless the tasklet must be kicked unconditionally | |
382 | so the queue cannot dry up */ | |
383 | } | |
11ea859d ON |
384 | if (likely(!acm->susp_count)) |
385 | tasklet_schedule(&acm->urb_task); | |
1da177e4 LT |
386 | } |
387 | ||
388 | static void acm_rx_tasklet(unsigned long _acm) | |
389 | { | |
390 | struct acm *acm = (void *)_acm; | |
61a87adf | 391 | struct acm_rb *buf; |
10077d4a | 392 | struct tty_struct *tty; |
61a87adf | 393 | struct acm_ru *rcv; |
762f007b | 394 | unsigned long flags; |
ca79b7b4 | 395 | unsigned char throttled; |
11ea859d | 396 | |
1da177e4 LT |
397 | dbg("Entering acm_rx_tasklet"); |
398 | ||
10077d4a | 399 | if (!ACM_READY(acm)) { |
11ea859d | 400 | dbg("acm_rx_tasklet: ACM not ready"); |
ca79b7b4 | 401 | return; |
11ea859d | 402 | } |
ca79b7b4 | 403 | |
834dbca5 | 404 | spin_lock_irqsave(&acm->throttle_lock, flags); |
ca79b7b4 | 405 | throttled = acm->throttle; |
834dbca5 | 406 | spin_unlock_irqrestore(&acm->throttle_lock, flags); |
10077d4a | 407 | if (throttled) { |
11ea859d | 408 | dbg("acm_rx_tasklet: throttled"); |
61a87adf | 409 | return; |
11ea859d | 410 | } |
61a87adf | 411 | |
10077d4a AC |
412 | tty = tty_port_tty_get(&acm->port); |
413 | ||
61a87adf | 414 | next_buffer: |
762f007b | 415 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 416 | if (list_empty(&acm->filled_read_bufs)) { |
762f007b | 417 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf | 418 | goto urbs; |
1da177e4 | 419 | } |
61a87adf DK |
420 | buf = list_entry(acm->filled_read_bufs.next, |
421 | struct acm_rb, list); | |
422 | list_del(&buf->list); | |
762f007b | 423 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf | 424 | |
3dd2ae81 | 425 | dbg("acm_rx_tasklet: procesing buf 0x%p, size = %d", buf, buf->size); |
61a87adf | 426 | |
10077d4a AC |
427 | if (tty) { |
428 | spin_lock_irqsave(&acm->throttle_lock, flags); | |
429 | throttled = acm->throttle; | |
430 | spin_unlock_irqrestore(&acm->throttle_lock, flags); | |
431 | if (!throttled) { | |
10077d4a AC |
432 | tty_insert_flip_string(tty, buf->base, buf->size); |
433 | tty_flip_buffer_push(tty); | |
434 | } else { | |
435 | tty_kref_put(tty); | |
436 | dbg("Throttling noticed"); | |
437 | spin_lock_irqsave(&acm->read_lock, flags); | |
438 | list_add(&buf->list, &acm->filled_read_bufs); | |
439 | spin_unlock_irqrestore(&acm->read_lock, flags); | |
440 | return; | |
441 | } | |
1da177e4 | 442 | } |
1da177e4 | 443 | |
762f007b | 444 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 445 | list_add(&buf->list, &acm->spare_read_bufs); |
762f007b | 446 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf DK |
447 | goto next_buffer; |
448 | ||
449 | urbs: | |
10077d4a AC |
450 | tty_kref_put(tty); |
451 | ||
61a87adf | 452 | while (!list_empty(&acm->spare_read_bufs)) { |
762f007b | 453 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 454 | if (list_empty(&acm->spare_read_urbs)) { |
11ea859d | 455 | acm->processing = 0; |
762f007b | 456 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf DK |
457 | return; |
458 | } | |
459 | rcv = list_entry(acm->spare_read_urbs.next, | |
460 | struct acm_ru, list); | |
461 | list_del(&rcv->list); | |
762f007b | 462 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf DK |
463 | |
464 | buf = list_entry(acm->spare_read_bufs.next, | |
465 | struct acm_rb, list); | |
466 | list_del(&buf->list); | |
467 | ||
468 | rcv->buffer = buf; | |
469 | ||
cf7fdd57 | 470 | if (acm->is_int_ep) |
5186ffee AL |
471 | usb_fill_int_urb(rcv->urb, acm->dev, |
472 | acm->rx_endpoint, | |
473 | buf->base, | |
474 | acm->readsize, | |
cf7fdd57 | 475 | acm_read_bulk, rcv, acm->bInterval); |
5186ffee AL |
476 | else |
477 | usb_fill_bulk_urb(rcv->urb, acm->dev, | |
478 | acm->rx_endpoint, | |
479 | buf->base, | |
480 | acm->readsize, | |
481 | acm_read_bulk, rcv); | |
61a87adf DK |
482 | rcv->urb->transfer_dma = buf->dma; |
483 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
484 | ||
6e47e069 AC |
485 | /* This shouldn't kill the driver as unsuccessful URBs are |
486 | returned to the free-urbs-pool and resubmited ASAP */ | |
11ea859d | 487 | spin_lock_irqsave(&acm->read_lock, flags); |
6e47e069 AC |
488 | if (acm->susp_count || |
489 | usb_submit_urb(rcv->urb, GFP_ATOMIC) < 0) { | |
61a87adf | 490 | list_add(&buf->list, &acm->spare_read_bufs); |
61a87adf | 491 | list_add(&rcv->list, &acm->spare_read_urbs); |
11ea859d | 492 | acm->processing = 0; |
762f007b | 493 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf | 494 | return; |
11ea859d ON |
495 | } else { |
496 | spin_unlock_irqrestore(&acm->read_lock, flags); | |
497 | dbg("acm_rx_tasklet: sending urb 0x%p, rcv 0x%p, buf 0x%p", rcv->urb, rcv, buf); | |
61a87adf DK |
498 | } |
499 | } | |
11ea859d ON |
500 | spin_lock_irqsave(&acm->read_lock, flags); |
501 | acm->processing = 0; | |
502 | spin_unlock_irqrestore(&acm->read_lock, flags); | |
1da177e4 LT |
503 | } |
504 | ||
505 | /* data interface wrote those outgoing bytes */ | |
7d12e780 | 506 | static void acm_write_bulk(struct urb *urb) |
1da177e4 | 507 | { |
cdc97792 | 508 | struct acm_wb *wb = urb->context; |
e5fbab51 | 509 | struct acm *acm = wb->instance; |
ad0b65ef | 510 | unsigned long flags; |
1da177e4 | 511 | |
e5fbab51 DB |
512 | if (verbose || urb->status |
513 | || (urb->actual_length != urb->transfer_buffer_length)) | |
514 | dev_dbg(&acm->data->dev, "tx %d/%d bytes -- > %d\n", | |
515 | urb->actual_length, | |
516 | urb->transfer_buffer_length, | |
517 | urb->status); | |
1da177e4 | 518 | |
ad0b65ef | 519 | spin_lock_irqsave(&acm->write_lock, flags); |
e4cf3aa8 | 520 | acm_write_done(acm, wb); |
ad0b65ef | 521 | spin_unlock_irqrestore(&acm->write_lock, flags); |
884b600f ON |
522 | if (ACM_READY(acm)) |
523 | schedule_work(&acm->work); | |
e5fbab51 DB |
524 | else |
525 | wake_up_interruptible(&acm->drain_wait); | |
1da177e4 LT |
526 | } |
527 | ||
c4028958 | 528 | static void acm_softint(struct work_struct *work) |
1da177e4 | 529 | { |
c4028958 | 530 | struct acm *acm = container_of(work, struct acm, work); |
10077d4a | 531 | struct tty_struct *tty; |
e5fbab51 DB |
532 | |
533 | dev_vdbg(&acm->data->dev, "tx work\n"); | |
1da177e4 LT |
534 | if (!ACM_READY(acm)) |
535 | return; | |
10077d4a | 536 | tty = tty_port_tty_get(&acm->port); |
15e5bee3 JH |
537 | if (!tty) |
538 | return; | |
10077d4a AC |
539 | tty_wakeup(tty); |
540 | tty_kref_put(tty); | |
1da177e4 LT |
541 | } |
542 | ||
543 | /* | |
544 | * TTY handlers | |
545 | */ | |
546 | ||
547 | static int acm_tty_open(struct tty_struct *tty, struct file *filp) | |
548 | { | |
549 | struct acm *acm; | |
42dd2aa6 | 550 | int rv = -ENODEV; |
61a87adf | 551 | int i; |
3dd2ae81 | 552 | dbg("Entering acm_tty_open."); |
4186ecf8 AV |
553 | |
554 | mutex_lock(&open_mutex); | |
1da177e4 LT |
555 | |
556 | acm = acm_table[tty->index]; | |
557 | if (!acm || !acm->dev) | |
2b626dc1 | 558 | goto out; |
1da177e4 LT |
559 | else |
560 | rv = 0; | |
561 | ||
28d1dfad | 562 | set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); |
10077d4a | 563 | |
1da177e4 | 564 | tty->driver_data = acm; |
10077d4a | 565 | tty_port_tty_set(&acm->port, tty); |
1da177e4 | 566 | |
94409cc1 ON |
567 | if (usb_autopm_get_interface(acm->control) < 0) |
568 | goto early_bail; | |
11ea859d ON |
569 | else |
570 | acm->control->needs_remote_wakeup = 1; | |
1365baf7 ON |
571 | |
572 | mutex_lock(&acm->mutex); | |
10077d4a | 573 | if (acm->port.count++) { |
2b626dc1 | 574 | mutex_unlock(&acm->mutex); |
1365baf7 | 575 | usb_autopm_put_interface(acm->control); |
2b626dc1 | 576 | goto out; |
10077d4a | 577 | } |
1365baf7 | 578 | |
1da177e4 LT |
579 | acm->ctrlurb->dev = acm->dev; |
580 | if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) { | |
581 | dbg("usb_submit_urb(ctrl irq) failed"); | |
582 | goto bail_out; | |
583 | } | |
584 | ||
ca79b7b4 ON |
585 | if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) && |
586 | (acm->ctrl_caps & USB_CDC_CAP_LINE)) | |
1da177e4 | 587 | goto full_bailout; |
10077d4a | 588 | |
11ea859d | 589 | usb_autopm_put_interface(acm->control); |
1da177e4 | 590 | |
61a87adf DK |
591 | INIT_LIST_HEAD(&acm->spare_read_urbs); |
592 | INIT_LIST_HEAD(&acm->spare_read_bufs); | |
593 | INIT_LIST_HEAD(&acm->filled_read_bufs); | |
6e47e069 AC |
594 | |
595 | for (i = 0; i < acm->rx_buflimit; i++) | |
61a87adf | 596 | list_add(&(acm->ru[i].list), &acm->spare_read_urbs); |
6e47e069 | 597 | for (i = 0; i < acm->rx_buflimit; i++) |
61a87adf | 598 | list_add(&(acm->rb[i].list), &acm->spare_read_bufs); |
61a87adf | 599 | |
ca79b7b4 ON |
600 | acm->throttle = 0; |
601 | ||
7af25b4b | 602 | set_bit(ASYNCB_INITIALIZED, &acm->port.flags); |
10077d4a | 603 | rv = tty_port_block_til_ready(&acm->port, tty, filp); |
18a77b5d | 604 | tasklet_schedule(&acm->urb_task); |
2b626dc1 | 605 | |
1365baf7 | 606 | mutex_unlock(&acm->mutex); |
2b626dc1 | 607 | out: |
94409cc1 | 608 | mutex_unlock(&open_mutex); |
1da177e4 LT |
609 | return rv; |
610 | ||
611 | full_bailout: | |
1da177e4 LT |
612 | usb_kill_urb(acm->ctrlurb); |
613 | bail_out: | |
10077d4a | 614 | acm->port.count--; |
1365baf7 | 615 | mutex_unlock(&acm->mutex); |
2b626dc1 | 616 | usb_autopm_put_interface(acm->control); |
94409cc1 ON |
617 | early_bail: |
618 | mutex_unlock(&open_mutex); | |
10077d4a | 619 | tty_port_tty_set(&acm->port, NULL); |
1da177e4 LT |
620 | return -EIO; |
621 | } | |
622 | ||
83ef344a | 623 | static void acm_tty_unregister(struct acm *acm) |
624 | { | |
10077d4a | 625 | int i, nr; |
61a87adf | 626 | |
86478944 | 627 | nr = acm->rx_buflimit; |
83ef344a | 628 | tty_unregister_device(acm_tty_driver, acm->minor); |
629 | usb_put_intf(acm->control); | |
630 | acm_table[acm->minor] = NULL; | |
631 | usb_free_urb(acm->ctrlurb); | |
e4cf3aa8 DE |
632 | for (i = 0; i < ACM_NW; i++) |
633 | usb_free_urb(acm->wb[i].urb); | |
86478944 | 634 | for (i = 0; i < nr; i++) |
61a87adf | 635 | usb_free_urb(acm->ru[i].urb); |
c4cabd28 | 636 | kfree(acm->country_codes); |
83ef344a | 637 | kfree(acm); |
638 | } | |
639 | ||
e5fbab51 DB |
640 | static int acm_tty_chars_in_buffer(struct tty_struct *tty); |
641 | ||
4e608671 | 642 | static void acm_port_down(struct acm *acm) |
10077d4a AC |
643 | { |
644 | int i, nr = acm->rx_buflimit; | |
645 | mutex_lock(&open_mutex); | |
646 | if (acm->dev) { | |
647 | usb_autopm_get_interface(acm->control); | |
648 | acm_set_control(acm, acm->ctrlout = 0); | |
10077d4a AC |
649 | usb_kill_urb(acm->ctrlurb); |
650 | for (i = 0; i < ACM_NW; i++) | |
651 | usb_kill_urb(acm->wb[i].urb); | |
23b80550 | 652 | tasklet_disable(&acm->urb_task); |
10077d4a AC |
653 | for (i = 0; i < nr; i++) |
654 | usb_kill_urb(acm->ru[i].urb); | |
23b80550 | 655 | tasklet_enable(&acm->urb_task); |
10077d4a AC |
656 | acm->control->needs_remote_wakeup = 0; |
657 | usb_autopm_put_interface(acm->control); | |
658 | } | |
659 | mutex_unlock(&open_mutex); | |
660 | } | |
661 | ||
662 | static void acm_tty_hangup(struct tty_struct *tty) | |
663 | { | |
664 | struct acm *acm = tty->driver_data; | |
665 | tty_port_hangup(&acm->port); | |
4e608671 | 666 | acm_port_down(acm); |
10077d4a AC |
667 | } |
668 | ||
1da177e4 LT |
669 | static void acm_tty_close(struct tty_struct *tty, struct file *filp) |
670 | { | |
671 | struct acm *acm = tty->driver_data; | |
672 | ||
10077d4a AC |
673 | /* Perform the closing process and see if we need to do the hardware |
674 | shutdown */ | |
051522bb | 675 | if (!acm) |
1da177e4 | 676 | return; |
051522bb FL |
677 | if (tty_port_close_start(&acm->port, tty, filp) == 0) { |
678 | mutex_lock(&open_mutex); | |
679 | if (!acm->dev) { | |
680 | tty_port_tty_set(&acm->port, NULL); | |
681 | acm_tty_unregister(acm); | |
682 | tty->driver_data = NULL; | |
683 | } | |
684 | mutex_unlock(&open_mutex); | |
685 | return; | |
686 | } | |
4e608671 | 687 | acm_port_down(acm); |
10077d4a | 688 | tty_port_close_end(&acm->port, tty); |
10077d4a | 689 | tty_port_tty_set(&acm->port, NULL); |
1da177e4 LT |
690 | } |
691 | ||
6e47e069 AC |
692 | static int acm_tty_write(struct tty_struct *tty, |
693 | const unsigned char *buf, int count) | |
1da177e4 LT |
694 | { |
695 | struct acm *acm = tty->driver_data; | |
696 | int stat; | |
884b600f ON |
697 | unsigned long flags; |
698 | int wbn; | |
699 | struct acm_wb *wb; | |
700 | ||
3dd2ae81 | 701 | dbg("Entering acm_tty_write to write %d bytes,", count); |
1da177e4 LT |
702 | |
703 | if (!ACM_READY(acm)) | |
704 | return -EINVAL; | |
1da177e4 LT |
705 | if (!count) |
706 | return 0; | |
707 | ||
884b600f | 708 | spin_lock_irqsave(&acm->write_lock, flags); |
6e47e069 AC |
709 | wbn = acm_wb_alloc(acm); |
710 | if (wbn < 0) { | |
884b600f | 711 | spin_unlock_irqrestore(&acm->write_lock, flags); |
884b600f ON |
712 | return 0; |
713 | } | |
714 | wb = &acm->wb[wbn]; | |
1da177e4 | 715 | |
884b600f | 716 | count = (count > acm->writesize) ? acm->writesize : count; |
1da177e4 | 717 | dbg("Get %d bytes...", count); |
884b600f ON |
718 | memcpy(wb->buf, buf, count); |
719 | wb->len = count; | |
720 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
1da177e4 | 721 | |
6e47e069 AC |
722 | stat = acm_write_start(acm, wbn); |
723 | if (stat < 0) | |
1da177e4 | 724 | return stat; |
1da177e4 LT |
725 | return count; |
726 | } | |
727 | ||
728 | static int acm_tty_write_room(struct tty_struct *tty) | |
729 | { | |
730 | struct acm *acm = tty->driver_data; | |
731 | if (!ACM_READY(acm)) | |
732 | return -EINVAL; | |
884b600f ON |
733 | /* |
734 | * Do not let the line discipline to know that we have a reserve, | |
735 | * or it might get too enthusiastic. | |
736 | */ | |
934da463 | 737 | return acm_wb_is_avail(acm) ? acm->writesize : 0; |
1da177e4 LT |
738 | } |
739 | ||
740 | static int acm_tty_chars_in_buffer(struct tty_struct *tty) | |
741 | { | |
742 | struct acm *acm = tty->driver_data; | |
743 | if (!ACM_READY(acm)) | |
23198fda | 744 | return 0; |
884b600f ON |
745 | /* |
746 | * This is inaccurate (overcounts), but it works. | |
747 | */ | |
86478944 | 748 | return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; |
1da177e4 LT |
749 | } |
750 | ||
751 | static void acm_tty_throttle(struct tty_struct *tty) | |
752 | { | |
753 | struct acm *acm = tty->driver_data; | |
754 | if (!ACM_READY(acm)) | |
755 | return; | |
756 | spin_lock_bh(&acm->throttle_lock); | |
757 | acm->throttle = 1; | |
758 | spin_unlock_bh(&acm->throttle_lock); | |
759 | } | |
760 | ||
761 | static void acm_tty_unthrottle(struct tty_struct *tty) | |
762 | { | |
763 | struct acm *acm = tty->driver_data; | |
764 | if (!ACM_READY(acm)) | |
765 | return; | |
766 | spin_lock_bh(&acm->throttle_lock); | |
767 | acm->throttle = 0; | |
768 | spin_unlock_bh(&acm->throttle_lock); | |
61a87adf | 769 | tasklet_schedule(&acm->urb_task); |
1da177e4 LT |
770 | } |
771 | ||
9e98966c | 772 | static int acm_tty_break_ctl(struct tty_struct *tty, int state) |
1da177e4 LT |
773 | { |
774 | struct acm *acm = tty->driver_data; | |
9e98966c | 775 | int retval; |
1da177e4 | 776 | if (!ACM_READY(acm)) |
9e98966c AC |
777 | return -EINVAL; |
778 | retval = acm_send_break(acm, state ? 0xffff : 0); | |
779 | if (retval < 0) | |
1da177e4 | 780 | dbg("send break failed"); |
9e98966c | 781 | return retval; |
1da177e4 LT |
782 | } |
783 | ||
60b33c13 | 784 | static int acm_tty_tiocmget(struct tty_struct *tty) |
1da177e4 LT |
785 | { |
786 | struct acm *acm = tty->driver_data; | |
787 | ||
788 | if (!ACM_READY(acm)) | |
789 | return -EINVAL; | |
790 | ||
791 | return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | | |
792 | (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | | |
793 | (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | | |
794 | (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | | |
795 | (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | | |
796 | TIOCM_CTS; | |
797 | } | |
798 | ||
20b9d177 | 799 | static int acm_tty_tiocmset(struct tty_struct *tty, |
1da177e4 LT |
800 | unsigned int set, unsigned int clear) |
801 | { | |
802 | struct acm *acm = tty->driver_data; | |
803 | unsigned int newctrl; | |
804 | ||
805 | if (!ACM_READY(acm)) | |
806 | return -EINVAL; | |
807 | ||
808 | newctrl = acm->ctrlout; | |
6e47e069 AC |
809 | set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | |
810 | (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); | |
811 | clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | | |
812 | (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); | |
1da177e4 LT |
813 | |
814 | newctrl = (newctrl & ~clear) | set; | |
815 | ||
816 | if (acm->ctrlout == newctrl) | |
817 | return 0; | |
818 | return acm_set_control(acm, acm->ctrlout = newctrl); | |
819 | } | |
820 | ||
6caa76b7 | 821 | static int acm_tty_ioctl(struct tty_struct *tty, |
6e47e069 | 822 | unsigned int cmd, unsigned long arg) |
1da177e4 LT |
823 | { |
824 | struct acm *acm = tty->driver_data; | |
825 | ||
826 | if (!ACM_READY(acm)) | |
827 | return -EINVAL; | |
828 | ||
829 | return -ENOIOCTLCMD; | |
830 | } | |
831 | ||
4c4c9432 | 832 | static const __u32 acm_tty_speed[] = { |
1da177e4 LT |
833 | 0, 50, 75, 110, 134, 150, 200, 300, 600, |
834 | 1200, 1800, 2400, 4800, 9600, 19200, 38400, | |
835 | 57600, 115200, 230400, 460800, 500000, 576000, | |
836 | 921600, 1000000, 1152000, 1500000, 2000000, | |
837 | 2500000, 3000000, 3500000, 4000000 | |
838 | }; | |
839 | ||
4c4c9432 | 840 | static const __u8 acm_tty_size[] = { |
1da177e4 LT |
841 | 5, 6, 7, 8 |
842 | }; | |
843 | ||
6e47e069 AC |
844 | static void acm_tty_set_termios(struct tty_struct *tty, |
845 | struct ktermios *termios_old) | |
1da177e4 LT |
846 | { |
847 | struct acm *acm = tty->driver_data; | |
606d099c | 848 | struct ktermios *termios = tty->termios; |
1da177e4 LT |
849 | struct usb_cdc_line_coding newline; |
850 | int newctrl = acm->ctrlout; | |
851 | ||
852 | if (!ACM_READY(acm)) | |
853 | return; | |
854 | ||
9b80fee1 | 855 | newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); |
1da177e4 LT |
856 | newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; |
857 | newline.bParityType = termios->c_cflag & PARENB ? | |
6e47e069 AC |
858 | (termios->c_cflag & PARODD ? 1 : 2) + |
859 | (termios->c_cflag & CMSPAR ? 2 : 0) : 0; | |
1da177e4 | 860 | newline.bDataBits = acm_tty_size[(termios->c_cflag & CSIZE) >> 4]; |
6e47e069 | 861 | /* FIXME: Needs to clear unsupported bits in the termios */ |
1da177e4 LT |
862 | acm->clocal = ((termios->c_cflag & CLOCAL) != 0); |
863 | ||
864 | if (!newline.dwDTERate) { | |
865 | newline.dwDTERate = acm->line.dwDTERate; | |
866 | newctrl &= ~ACM_CTRL_DTR; | |
6e47e069 AC |
867 | } else |
868 | newctrl |= ACM_CTRL_DTR; | |
1da177e4 LT |
869 | |
870 | if (newctrl != acm->ctrlout) | |
871 | acm_set_control(acm, acm->ctrlout = newctrl); | |
872 | ||
873 | if (memcmp(&acm->line, &newline, sizeof newline)) { | |
874 | memcpy(&acm->line, &newline, sizeof newline); | |
875 | dbg("set line: %d %d %d %d", le32_to_cpu(newline.dwDTERate), | |
876 | newline.bCharFormat, newline.bParityType, | |
877 | newline.bDataBits); | |
878 | acm_set_line(acm, &acm->line); | |
879 | } | |
880 | } | |
881 | ||
882 | /* | |
883 | * USB probe and disconnect routines. | |
884 | */ | |
885 | ||
830f4021 | 886 | /* Little helpers: write/read buffers free */ |
884b600f ON |
887 | static void acm_write_buffers_free(struct acm *acm) |
888 | { | |
889 | int i; | |
890 | struct acm_wb *wb; | |
a496c64f | 891 | struct usb_device *usb_dev = interface_to_usbdev(acm->control); |
884b600f | 892 | |
6e47e069 | 893 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) |
997ea58e | 894 | usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah); |
884b600f ON |
895 | } |
896 | ||
830f4021 ON |
897 | static void acm_read_buffers_free(struct acm *acm) |
898 | { | |
899 | struct usb_device *usb_dev = interface_to_usbdev(acm->control); | |
900 | int i, n = acm->rx_buflimit; | |
901 | ||
902 | for (i = 0; i < n; i++) | |
997ea58e DM |
903 | usb_free_coherent(usb_dev, acm->readsize, |
904 | acm->rb[i].base, acm->rb[i].dma); | |
830f4021 ON |
905 | } |
906 | ||
884b600f ON |
907 | /* Little helper: write buffers allocate */ |
908 | static int acm_write_buffers_alloc(struct acm *acm) | |
909 | { | |
910 | int i; | |
911 | struct acm_wb *wb; | |
912 | ||
86478944 | 913 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { |
997ea58e | 914 | wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, |
884b600f ON |
915 | &wb->dmah); |
916 | if (!wb->buf) { | |
917 | while (i != 0) { | |
918 | --i; | |
919 | --wb; | |
997ea58e | 920 | usb_free_coherent(acm->dev, acm->writesize, |
884b600f ON |
921 | wb->buf, wb->dmah); |
922 | } | |
923 | return -ENOMEM; | |
924 | } | |
925 | } | |
926 | return 0; | |
927 | } | |
928 | ||
10077d4a AC |
929 | static int acm_probe(struct usb_interface *intf, |
930 | const struct usb_device_id *id) | |
1da177e4 LT |
931 | { |
932 | struct usb_cdc_union_desc *union_header = NULL; | |
c4cabd28 | 933 | struct usb_cdc_country_functional_desc *cfd = NULL; |
c6dbf554 | 934 | unsigned char *buffer = intf->altsetting->extra; |
1da177e4 LT |
935 | int buflen = intf->altsetting->extralen; |
936 | struct usb_interface *control_interface; | |
937 | struct usb_interface *data_interface; | |
a2bfb4a3 ON |
938 | struct usb_endpoint_descriptor *epctrl = NULL; |
939 | struct usb_endpoint_descriptor *epread = NULL; | |
940 | struct usb_endpoint_descriptor *epwrite = NULL; | |
1da177e4 LT |
941 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
942 | struct acm *acm; | |
943 | int minor; | |
6e47e069 | 944 | int ctrlsize, readsize; |
1da177e4 LT |
945 | u8 *buf; |
946 | u8 ac_management_function = 0; | |
947 | u8 call_management_function = 0; | |
948 | int call_interface_num = -1; | |
949 | int data_interface_num; | |
950 | unsigned long quirks; | |
86478944 | 951 | int num_rx_buf; |
61a87adf | 952 | int i; |
a2bfb4a3 | 953 | int combined_interfaces = 0; |
1da177e4 | 954 | |
86478944 | 955 | /* normal quirks */ |
1da177e4 | 956 | quirks = (unsigned long)id->driver_info; |
86478944 ON |
957 | num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; |
958 | ||
959 | /* handle quirks deadly to normal probing*/ | |
1da177e4 LT |
960 | if (quirks == NO_UNION_NORMAL) { |
961 | data_interface = usb_ifnum_to_if(usb_dev, 1); | |
962 | control_interface = usb_ifnum_to_if(usb_dev, 0); | |
963 | goto skip_normal_probe; | |
964 | } | |
6e47e069 | 965 | |
1da177e4 LT |
966 | /* normal probing*/ |
967 | if (!buffer) { | |
9908a32e | 968 | dev_err(&intf->dev, "Weird descriptor references\n"); |
1da177e4 LT |
969 | return -EINVAL; |
970 | } | |
971 | ||
972 | if (!buflen) { | |
577045c0 TG |
973 | if (intf->cur_altsetting->endpoint && |
974 | intf->cur_altsetting->endpoint->extralen && | |
6e47e069 AC |
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) { | |
255ab56c | 1146 | dev_err(&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 | 1179 | |
997ea58e | 1180 | buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); |
1da177e4 | 1181 | if (!buf) { |
255ab56c | 1182 | dev_err(&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) { |
255ab56c | 1188 | dev_err(&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) { | |
255ab56c | 1194 | dev_err(&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) { | |
255ab56c | 1202 | dev_err(&intf->dev, |
6e47e069 | 1203 | "out of memory (read urbs usb_alloc_urb)\n"); |
c2572b78 | 1204 | goto alloc_fail6; |
61a87adf DK |
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 | |
997ea58e | 1213 | rb->base = usb_alloc_coherent(acm->dev, readsize, |
672c4e18 DB |
1214 | GFP_KERNEL, &rb->dma); |
1215 | if (!rb->base) { | |
255ab56c | 1216 | dev_err(&intf->dev, |
997ea58e | 1217 | "out of memory (read bufs usb_alloc_coherent)\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) { | |
255ab56c | 1226 | dev_err(&intf->dev, |
59d7fec7 | 1227 | "out of memory (write urbs usb_alloc_urb)\n"); |
c2572b78 | 1228 | goto alloc_fail8; |
e4cf3aa8 DE |
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 | 1266 | if (i < 0) { |
c2572b78 | 1267 | device_remove_file(&intf->dev, &dev_attr_wCountryCodes); |
c4cabd28 ON |
1268 | kfree(acm->country_codes); |
1269 | goto skip_countries; | |
1270 | } | |
1271 | } | |
1272 | ||
1273 | skip_countries: | |
6e47e069 | 1274 | usb_fill_int_urb(acm->ctrlurb, usb_dev, |
a2bfb4a3 ON |
1275 | usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), |
1276 | acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, | |
1277 | /* works around buggy devices */ | |
1278 | epctrl->bInterval ? epctrl->bInterval : 0xff); | |
1da177e4 LT |
1279 | acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
1280 | acm->ctrlurb->transfer_dma = acm->ctrl_dma; | |
1281 | ||
1da177e4 LT |
1282 | dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); |
1283 | ||
1284 | acm_set_control(acm, acm->ctrlout); | |
1285 | ||
1286 | acm->line.dwDTERate = cpu_to_le32(9600); | |
1287 | acm->line.bDataBits = 8; | |
1288 | acm_set_line(acm, &acm->line); | |
1289 | ||
1290 | usb_driver_claim_interface(&acm_driver, data_interface, acm); | |
672c4e18 | 1291 | usb_set_intfdata(data_interface, acm); |
1da177e4 | 1292 | |
83ef344a | 1293 | usb_get_intf(control_interface); |
1294 | tty_register_device(acm_tty_driver, minor, &control_interface->dev); | |
1da177e4 LT |
1295 | |
1296 | acm_table[minor] = acm; | |
1da177e4 | 1297 | |
c4cabd28 ON |
1298 | return 0; |
1299 | alloc_fail8: | |
e4cf3aa8 DE |
1300 | for (i = 0; i < ACM_NW; i++) |
1301 | usb_free_urb(acm->wb[i].urb); | |
1da177e4 | 1302 | alloc_fail7: |
830f4021 | 1303 | acm_read_buffers_free(acm); |
c2572b78 | 1304 | alloc_fail6: |
86478944 | 1305 | for (i = 0; i < num_rx_buf; i++) |
61a87adf | 1306 | usb_free_urb(acm->ru[i].urb); |
1da177e4 LT |
1307 | usb_free_urb(acm->ctrlurb); |
1308 | alloc_fail5: | |
884b600f | 1309 | acm_write_buffers_free(acm); |
1da177e4 | 1310 | alloc_fail4: |
997ea58e | 1311 | usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); |
1da177e4 LT |
1312 | alloc_fail2: |
1313 | kfree(acm); | |
1314 | alloc_fail: | |
1315 | return -ENOMEM; | |
1316 | } | |
1317 | ||
1365baf7 ON |
1318 | static void stop_data_traffic(struct acm *acm) |
1319 | { | |
1320 | int i; | |
11ea859d | 1321 | dbg("Entering stop_data_traffic"); |
1365baf7 ON |
1322 | |
1323 | tasklet_disable(&acm->urb_task); | |
1324 | ||
1325 | usb_kill_urb(acm->ctrlurb); | |
6e47e069 | 1326 | for (i = 0; i < ACM_NW; i++) |
e4cf3aa8 | 1327 | usb_kill_urb(acm->wb[i].urb); |
1365baf7 ON |
1328 | for (i = 0; i < acm->rx_buflimit; i++) |
1329 | usb_kill_urb(acm->ru[i].urb); | |
1330 | ||
1365baf7 ON |
1331 | tasklet_enable(&acm->urb_task); |
1332 | ||
1333 | cancel_work_sync(&acm->work); | |
1334 | } | |
1335 | ||
1da177e4 LT |
1336 | static void acm_disconnect(struct usb_interface *intf) |
1337 | { | |
c4cabd28 | 1338 | struct acm *acm = usb_get_intfdata(intf); |
1da177e4 | 1339 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
10077d4a | 1340 | struct tty_struct *tty; |
1da177e4 | 1341 | |
672c4e18 DB |
1342 | /* sibling interface is already cleaning up */ |
1343 | if (!acm) | |
86067eea | 1344 | return; |
672c4e18 DB |
1345 | |
1346 | mutex_lock(&open_mutex); | |
6e47e069 | 1347 | if (acm->country_codes) { |
74da5d68 AS |
1348 | device_remove_file(&acm->control->dev, |
1349 | &dev_attr_wCountryCodes); | |
1350 | device_remove_file(&acm->control->dev, | |
1351 | &dev_attr_iCountryCodeRelDate); | |
c4cabd28 | 1352 | } |
74da5d68 | 1353 | device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); |
1da177e4 | 1354 | acm->dev = NULL; |
86067eea ON |
1355 | usb_set_intfdata(acm->control, NULL); |
1356 | usb_set_intfdata(acm->data, NULL); | |
1da177e4 | 1357 | |
1365baf7 | 1358 | stop_data_traffic(acm); |
1da177e4 | 1359 | |
884b600f | 1360 | acm_write_buffers_free(acm); |
997ea58e DM |
1361 | usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, |
1362 | acm->ctrl_dma); | |
830f4021 | 1363 | acm_read_buffers_free(acm); |
1da177e4 | 1364 | |
a2bfb4a3 ON |
1365 | if (!acm->combined_interfaces) |
1366 | usb_driver_release_interface(&acm_driver, intf == acm->control ? | |
830f4021 | 1367 | acm->data : acm->control); |
1da177e4 | 1368 | |
10077d4a | 1369 | if (acm->port.count == 0) { |
83ef344a | 1370 | acm_tty_unregister(acm); |
4186ecf8 | 1371 | mutex_unlock(&open_mutex); |
1da177e4 LT |
1372 | return; |
1373 | } | |
1374 | ||
4186ecf8 | 1375 | mutex_unlock(&open_mutex); |
10077d4a AC |
1376 | tty = tty_port_tty_get(&acm->port); |
1377 | if (tty) { | |
1378 | tty_hangup(tty); | |
1379 | tty_kref_put(tty); | |
1380 | } | |
1da177e4 LT |
1381 | } |
1382 | ||
35758589 | 1383 | #ifdef CONFIG_PM |
1365baf7 ON |
1384 | static int acm_suspend(struct usb_interface *intf, pm_message_t message) |
1385 | { | |
1386 | struct acm *acm = usb_get_intfdata(intf); | |
11ea859d ON |
1387 | int cnt; |
1388 | ||
65bfd296 | 1389 | if (message.event & PM_EVENT_AUTO) { |
11ea859d ON |
1390 | int b; |
1391 | ||
1392 | spin_lock_irq(&acm->read_lock); | |
1393 | spin_lock(&acm->write_lock); | |
1394 | b = acm->processing + acm->transmitting; | |
1395 | spin_unlock(&acm->write_lock); | |
1396 | spin_unlock_irq(&acm->read_lock); | |
1397 | if (b) | |
1398 | return -EBUSY; | |
1399 | } | |
1400 | ||
1401 | spin_lock_irq(&acm->read_lock); | |
1402 | spin_lock(&acm->write_lock); | |
1403 | cnt = acm->susp_count++; | |
1404 | spin_unlock(&acm->write_lock); | |
1405 | spin_unlock_irq(&acm->read_lock); | |
1365baf7 | 1406 | |
11ea859d | 1407 | if (cnt) |
1365baf7 ON |
1408 | return 0; |
1409 | /* | |
1410 | we treat opened interfaces differently, | |
1411 | we must guard against open | |
1412 | */ | |
1413 | mutex_lock(&acm->mutex); | |
1414 | ||
10077d4a | 1415 | if (acm->port.count) |
1365baf7 ON |
1416 | stop_data_traffic(acm); |
1417 | ||
1418 | mutex_unlock(&acm->mutex); | |
1419 | return 0; | |
1420 | } | |
1421 | ||
1422 | static int acm_resume(struct usb_interface *intf) | |
1423 | { | |
1424 | struct acm *acm = usb_get_intfdata(intf); | |
97d35f95 | 1425 | struct acm_wb *wb; |
1365baf7 | 1426 | int rv = 0; |
11ea859d | 1427 | int cnt; |
1365baf7 | 1428 | |
11ea859d ON |
1429 | spin_lock_irq(&acm->read_lock); |
1430 | acm->susp_count -= 1; | |
1431 | cnt = acm->susp_count; | |
1432 | spin_unlock_irq(&acm->read_lock); | |
1433 | ||
1434 | if (cnt) | |
1365baf7 ON |
1435 | return 0; |
1436 | ||
1437 | mutex_lock(&acm->mutex); | |
10077d4a | 1438 | if (acm->port.count) { |
1365baf7 | 1439 | rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO); |
97d35f95 ON |
1440 | |
1441 | spin_lock_irq(&acm->write_lock); | |
1442 | if (acm->delayed_wb) { | |
1443 | wb = acm->delayed_wb; | |
1444 | acm->delayed_wb = NULL; | |
1445 | spin_unlock_irq(&acm->write_lock); | |
f0730924 | 1446 | acm_start_wb(acm, wb); |
97d35f95 ON |
1447 | } else { |
1448 | spin_unlock_irq(&acm->write_lock); | |
1449 | } | |
1450 | ||
1451 | /* | |
1452 | * delayed error checking because we must | |
1453 | * do the write path at all cost | |
1454 | */ | |
1365baf7 | 1455 | if (rv < 0) |
11ea859d | 1456 | goto err_out; |
1365baf7 ON |
1457 | |
1458 | tasklet_schedule(&acm->urb_task); | |
1459 | } | |
1460 | ||
1461 | err_out: | |
1462 | mutex_unlock(&acm->mutex); | |
1463 | return rv; | |
1464 | } | |
35758589 | 1465 | |
a91b0c50 FL |
1466 | static int acm_reset_resume(struct usb_interface *intf) |
1467 | { | |
1468 | struct acm *acm = usb_get_intfdata(intf); | |
1469 | struct tty_struct *tty; | |
1470 | ||
1471 | mutex_lock(&acm->mutex); | |
1472 | if (acm->port.count) { | |
1473 | tty = tty_port_tty_get(&acm->port); | |
1474 | if (tty) { | |
1475 | tty_hangup(tty); | |
1476 | tty_kref_put(tty); | |
1477 | } | |
1478 | } | |
1479 | mutex_unlock(&acm->mutex); | |
1480 | return acm_resume(intf); | |
1481 | } | |
1482 | ||
35758589 | 1483 | #endif /* CONFIG_PM */ |
c1479a92 AT |
1484 | |
1485 | #define NOKIA_PCSUITE_ACM_INFO(x) \ | |
1486 | USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ | |
1487 | USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ | |
1488 | USB_CDC_ACM_PROTO_VENDOR) | |
1489 | ||
4035e456 TG |
1490 | #define SAMSUNG_PCSUITE_ACM_INFO(x) \ |
1491 | USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ | |
1492 | USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ | |
1493 | USB_CDC_ACM_PROTO_VENDOR) | |
1494 | ||
1da177e4 LT |
1495 | /* |
1496 | * USB driver structure. | |
1497 | */ | |
1498 | ||
6ef4852b | 1499 | static const struct usb_device_id acm_ids[] = { |
1da177e4 LT |
1500 | /* quirky and broken devices */ |
1501 | { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ | |
1502 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1503 | }, | |
b0e2a705 AA |
1504 | { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ |
1505 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1506 | }, | |
0f9c7b4a AL |
1507 | { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ |
1508 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1509 | }, | |
8753e65e MO |
1510 | { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ |
1511 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1512 | }, | |
91a9c921 CM |
1513 | { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ |
1514 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1515 | }, | |
7abcf20b AC |
1516 | { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ |
1517 | .driver_info = SINGLE_RX_URB, | |
1518 | }, | |
86478944 ON |
1519 | { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ |
1520 | .driver_info = SINGLE_RX_URB, /* firmware bug */ | |
1521 | }, | |
3dd2ae81 ON |
1522 | { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ |
1523 | .driver_info = SINGLE_RX_URB, /* firmware bug */ | |
1524 | }, | |
9be8456c ON |
1525 | { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ |
1526 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1527 | }, | |
6149ed5e IM |
1528 | { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ |
1529 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1530 | }, | |
c8fd2c37 ES |
1531 | { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ |
1532 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1533 | }, | |
c89c60e9 AC |
1534 | { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ |
1535 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1536 | }, | |
cab98a0a XK |
1537 | { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ |
1538 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1539 | }, | |
155df65a DT |
1540 | { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ |
1541 | }, | |
c332b4e1 AR |
1542 | { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ |
1543 | .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on | |
1544 | data interface instead of | |
1545 | communications interface. | |
1546 | Maybe we should define a new | |
1547 | quirk for this. */ | |
1548 | }, | |
1f17c502 KK |
1549 | { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ |
1550 | .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ | |
1551 | }, | |
c3baa19b RN |
1552 | { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ |
1553 | .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ | |
1554 | }, | |
9be8456c | 1555 | |
c1479a92 AT |
1556 | /* Nokia S60 phones expose two ACM channels. The first is |
1557 | * a modem and is picked up by the standard AT-command | |
1558 | * information below. The second is 'vendor-specific' but | |
1559 | * is treated as a serial device at the S60 end, so we want | |
1560 | * to expose it on Linux too. */ | |
1561 | { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ | |
1562 | { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ | |
1563 | { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ | |
1564 | { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ | |
1565 | { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ | |
1566 | { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ | |
1567 | { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ | |
1568 | { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ | |
1569 | { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ | |
1570 | { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ | |
1571 | { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ | |
1572 | { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ | |
1573 | { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ | |
1574 | { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ | |
1575 | { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ | |
1576 | { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ | |
1577 | { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ | |
1578 | { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ | |
1579 | { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ | |
1580 | { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ | |
1581 | { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ | |
1582 | { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ | |
1583 | { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ | |
1584 | { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ | |
1585 | { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ | |
1586 | { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ | |
1587 | { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ | |
1588 | { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ | |
1589 | { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ | |
1590 | { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ | |
1591 | { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ | |
1592 | { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ | |
1593 | { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ | |
1594 | { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ | |
1595 | { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ | |
1596 | { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ | |
1597 | { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ | |
1598 | { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ | |
1599 | { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ | |
1600 | { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ | |
1601 | { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ | |
1602 | { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ | |
1603 | { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ | |
83a4eae9 | 1604 | { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ |
4035e456 TG |
1605 | { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ |
1606 | { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ | |
1607 | { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ | |
1608 | { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ | |
1609 | { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ | |
1610 | { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ | |
1611 | { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ | |
1612 | { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ | |
1613 | { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ | |
1614 | { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ | |
721d92fc | 1615 | { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ |
4035e456 | 1616 | { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ |
c1479a92 AT |
1617 | |
1618 | /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ | |
1619 | ||
7c5d8c39 | 1620 | /* Support Lego NXT using pbLua firmware */ |
ce126644 JC |
1621 | { USB_DEVICE(0x0694, 0xff00), |
1622 | .driver_info = NOT_A_MODEM, | |
7893afc0 | 1623 | }, |
7c5d8c39 | 1624 | |
5b239f0a PC |
1625 | /* control interfaces without any protocol set */ |
1626 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1627 | USB_CDC_PROTO_NONE) }, | |
1628 | ||
1da177e4 LT |
1629 | /* control interfaces with various AT-command sets */ |
1630 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1631 | USB_CDC_ACM_PROTO_AT_V25TER) }, | |
1632 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1633 | USB_CDC_ACM_PROTO_AT_PCCA101) }, | |
1634 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1635 | USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, | |
1636 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1637 | USB_CDC_ACM_PROTO_AT_GSM) }, | |
1638 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
6e47e069 | 1639 | USB_CDC_ACM_PROTO_AT_3G) }, |
1da177e4 LT |
1640 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
1641 | USB_CDC_ACM_PROTO_AT_CDMA) }, | |
1642 | ||
1da177e4 LT |
1643 | { } |
1644 | }; | |
1645 | ||
6e47e069 | 1646 | MODULE_DEVICE_TABLE(usb, acm_ids); |
1da177e4 LT |
1647 | |
1648 | static struct usb_driver acm_driver = { | |
1da177e4 LT |
1649 | .name = "cdc_acm", |
1650 | .probe = acm_probe, | |
1651 | .disconnect = acm_disconnect, | |
35758589 | 1652 | #ifdef CONFIG_PM |
1365baf7 ON |
1653 | .suspend = acm_suspend, |
1654 | .resume = acm_resume, | |
a91b0c50 | 1655 | .reset_resume = acm_reset_resume, |
35758589 | 1656 | #endif |
1da177e4 | 1657 | .id_table = acm_ids, |
35758589 | 1658 | #ifdef CONFIG_PM |
1365baf7 | 1659 | .supports_autosuspend = 1, |
35758589 | 1660 | #endif |
1da177e4 LT |
1661 | }; |
1662 | ||
1663 | /* | |
1664 | * TTY driver structures. | |
1665 | */ | |
1666 | ||
b68e31d0 | 1667 | static const struct tty_operations acm_ops = { |
1da177e4 LT |
1668 | .open = acm_tty_open, |
1669 | .close = acm_tty_close, | |
10077d4a | 1670 | .hangup = acm_tty_hangup, |
1da177e4 LT |
1671 | .write = acm_tty_write, |
1672 | .write_room = acm_tty_write_room, | |
1673 | .ioctl = acm_tty_ioctl, | |
1674 | .throttle = acm_tty_throttle, | |
1675 | .unthrottle = acm_tty_unthrottle, | |
1676 | .chars_in_buffer = acm_tty_chars_in_buffer, | |
1677 | .break_ctl = acm_tty_break_ctl, | |
1678 | .set_termios = acm_tty_set_termios, | |
1679 | .tiocmget = acm_tty_tiocmget, | |
1680 | .tiocmset = acm_tty_tiocmset, | |
1681 | }; | |
1682 | ||
1683 | /* | |
1684 | * Init / exit. | |
1685 | */ | |
1686 | ||
1687 | static int __init acm_init(void) | |
1688 | { | |
1689 | int retval; | |
1690 | acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); | |
1691 | if (!acm_tty_driver) | |
1692 | return -ENOMEM; | |
1693 | acm_tty_driver->owner = THIS_MODULE, | |
1694 | acm_tty_driver->driver_name = "acm", | |
1695 | acm_tty_driver->name = "ttyACM", | |
1da177e4 LT |
1696 | acm_tty_driver->major = ACM_TTY_MAJOR, |
1697 | acm_tty_driver->minor_start = 0, | |
1698 | acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, | |
1699 | acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, | |
331b8319 | 1700 | acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
1da177e4 | 1701 | acm_tty_driver->init_termios = tty_std_termios; |
6e47e069 AC |
1702 | acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | |
1703 | HUPCL | CLOCAL; | |
1da177e4 LT |
1704 | tty_set_operations(acm_tty_driver, &acm_ops); |
1705 | ||
1706 | retval = tty_register_driver(acm_tty_driver); | |
1707 | if (retval) { | |
1708 | put_tty_driver(acm_tty_driver); | |
1709 | return retval; | |
1710 | } | |
1711 | ||
1712 | retval = usb_register(&acm_driver); | |
1713 | if (retval) { | |
1714 | tty_unregister_driver(acm_tty_driver); | |
1715 | put_tty_driver(acm_tty_driver); | |
1716 | return retval; | |
1717 | } | |
1718 | ||
5909f6ea GKH |
1719 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
1720 | DRIVER_DESC "\n"); | |
1da177e4 LT |
1721 | |
1722 | return 0; | |
1723 | } | |
1724 | ||
1725 | static void __exit acm_exit(void) | |
1726 | { | |
1727 | usb_deregister(&acm_driver); | |
1728 | tty_unregister_driver(acm_tty_driver); | |
1729 | put_tty_driver(acm_tty_driver); | |
1730 | } | |
1731 | ||
1732 | module_init(acm_init); | |
1733 | module_exit(acm_exit); | |
1734 | ||
6e47e069 AC |
1735 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1736 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 | 1737 | MODULE_LICENSE("GPL"); |
e766aeb8 | 1738 | MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); |