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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 | |
19 | * v0.12 - added TIOCM ioctls, added break handling, made struct acm kmalloced | |
20 | * v0.13 - added termios, added hangup | |
21 | * v0.14 - sized down struct acm | |
22 | * v0.15 - fixed flow control again - characters could be lost | |
23 | * v0.16 - added code for modems with swapped data and control interfaces | |
24 | * v0.17 - added new style probing | |
25 | * v0.18 - fixed new style probing for devices with more configurations | |
26 | * v0.19 - fixed CLOCAL handling (thanks to Richard Shih-Ping Chan) | |
27 | * v0.20 - switched to probing on interface (rather than device) class | |
28 | * v0.21 - revert to probing on device for devices with multiple configs | |
29 | * v0.22 - probe only the control interface. if usbcore doesn't choose the | |
30 | * config we want, sysadmin changes bConfigurationValue in sysfs. | |
31 | * v0.23 - use softirq for rx processing, as needed by tty layer | |
32 | * v0.24 - change probe method to evaluate CDC union descriptor | |
61a87adf | 33 | * v0.25 - downstream tasks paralelized to maximize throughput |
1da177e4 LT |
34 | */ |
35 | ||
36 | /* | |
37 | * This program is free software; you can redistribute it and/or modify | |
38 | * it under the terms of the GNU General Public License as published by | |
39 | * the Free Software Foundation; either version 2 of the License, or | |
40 | * (at your option) any later version. | |
41 | * | |
42 | * This program is distributed in the hope that it will be useful, | |
43 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
44 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
45 | * GNU General Public License for more details. | |
46 | * | |
47 | * You should have received a copy of the GNU General Public License | |
48 | * along with this program; if not, write to the Free Software | |
49 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
50 | */ | |
51 | ||
52 | #undef DEBUG | |
53 | ||
54 | #include <linux/kernel.h> | |
55 | #include <linux/errno.h> | |
56 | #include <linux/init.h> | |
57 | #include <linux/slab.h> | |
58 | #include <linux/tty.h> | |
59 | #include <linux/tty_driver.h> | |
60 | #include <linux/tty_flip.h> | |
61 | #include <linux/module.h> | |
62 | #include <linux/smp_lock.h> | |
4186ecf8 | 63 | #include <linux/mutex.h> |
1da177e4 LT |
64 | #include <asm/uaccess.h> |
65 | #include <linux/usb.h> | |
66 | #include <linux/usb_cdc.h> | |
67 | #include <asm/byteorder.h> | |
68 | #include <asm/unaligned.h> | |
61a87adf | 69 | #include <linux/list.h> |
1da177e4 LT |
70 | |
71 | #include "cdc-acm.h" | |
72 | ||
73 | /* | |
74 | * Version Information | |
75 | */ | |
61a87adf DK |
76 | #define DRIVER_VERSION "v0.25" |
77 | #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek" | |
1da177e4 LT |
78 | #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" |
79 | ||
80 | static struct usb_driver acm_driver; | |
81 | static struct tty_driver *acm_tty_driver; | |
82 | static struct acm *acm_table[ACM_TTY_MINORS]; | |
83 | ||
4186ecf8 | 84 | static DEFINE_MUTEX(open_mutex); |
1da177e4 LT |
85 | |
86 | #define ACM_READY(acm) (acm && acm->dev && acm->used) | |
87 | ||
88 | /* | |
89 | * Functions for ACM control messages. | |
90 | */ | |
91 | ||
92 | static int acm_ctrl_msg(struct acm *acm, int request, int value, void *buf, int len) | |
93 | { | |
94 | int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), | |
95 | request, USB_RT_ACM, value, | |
96 | acm->control->altsetting[0].desc.bInterfaceNumber, | |
97 | buf, len, 5000); | |
98 | dbg("acm_control_msg: rq: 0x%02x val: %#x len: %#x result: %d", request, value, len, retval); | |
99 | return retval < 0 ? retval : 0; | |
100 | } | |
101 | ||
102 | /* devices aren't required to support these requests. | |
103 | * the cdc acm descriptor tells whether they do... | |
104 | */ | |
105 | #define acm_set_control(acm, control) \ | |
106 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0) | |
107 | #define acm_set_line(acm, line) \ | |
108 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) | |
109 | #define acm_send_break(acm, ms) \ | |
110 | acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) | |
111 | ||
884b600f ON |
112 | /* |
113 | * Write buffer management. | |
114 | * All of these assume proper locks taken by the caller. | |
115 | */ | |
116 | ||
117 | static int acm_wb_alloc(struct acm *acm) | |
118 | { | |
119 | int i, wbn; | |
120 | struct acm_wb *wb; | |
121 | ||
122 | wbn = acm->write_current; | |
123 | i = 0; | |
124 | for (;;) { | |
125 | wb = &acm->wb[wbn]; | |
126 | if (!wb->use) { | |
127 | wb->use = 1; | |
128 | return wbn; | |
129 | } | |
130 | wbn = (wbn + 1) % ACM_NWB; | |
131 | if (++i >= ACM_NWB) | |
132 | return -1; | |
133 | } | |
134 | } | |
135 | ||
136 | static void acm_wb_free(struct acm *acm, int wbn) | |
137 | { | |
138 | acm->wb[wbn].use = 0; | |
139 | } | |
140 | ||
141 | static int acm_wb_is_avail(struct acm *acm) | |
142 | { | |
143 | int i, n; | |
144 | ||
145 | n = 0; | |
146 | for (i = 0; i < ACM_NWB; i++) { | |
147 | if (!acm->wb[i].use) | |
148 | n++; | |
149 | } | |
150 | return n; | |
151 | } | |
152 | ||
153 | static inline int acm_wb_is_used(struct acm *acm, int wbn) | |
154 | { | |
155 | return acm->wb[wbn].use; | |
156 | } | |
157 | ||
158 | /* | |
159 | * Finish write. | |
160 | */ | |
161 | static void acm_write_done(struct acm *acm) | |
162 | { | |
163 | unsigned long flags; | |
164 | int wbn; | |
165 | ||
166 | spin_lock_irqsave(&acm->write_lock, flags); | |
167 | acm->write_ready = 1; | |
168 | wbn = acm->write_current; | |
169 | acm_wb_free(acm, wbn); | |
170 | acm->write_current = (wbn + 1) % ACM_NWB; | |
171 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
172 | } | |
173 | ||
174 | /* | |
175 | * Poke write. | |
176 | */ | |
177 | static int acm_write_start(struct acm *acm) | |
178 | { | |
179 | unsigned long flags; | |
180 | int wbn; | |
181 | struct acm_wb *wb; | |
182 | int rc; | |
183 | ||
184 | spin_lock_irqsave(&acm->write_lock, flags); | |
185 | if (!acm->dev) { | |
186 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
187 | return -ENODEV; | |
188 | } | |
189 | ||
190 | if (!acm->write_ready) { | |
191 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
192 | return 0; /* A white lie */ | |
193 | } | |
194 | ||
195 | wbn = acm->write_current; | |
196 | if (!acm_wb_is_used(acm, wbn)) { | |
197 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
198 | return 0; | |
199 | } | |
200 | wb = &acm->wb[wbn]; | |
201 | ||
202 | acm->write_ready = 0; | |
203 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
204 | ||
205 | acm->writeurb->transfer_buffer = wb->buf; | |
206 | acm->writeurb->transfer_dma = wb->dmah; | |
207 | acm->writeurb->transfer_buffer_length = wb->len; | |
208 | acm->writeurb->dev = acm->dev; | |
209 | ||
210 | if ((rc = usb_submit_urb(acm->writeurb, GFP_ATOMIC)) < 0) { | |
211 | dbg("usb_submit_urb(write bulk) failed: %d", rc); | |
212 | acm_write_done(acm); | |
213 | } | |
214 | return rc; | |
215 | } | |
216 | ||
1da177e4 LT |
217 | /* |
218 | * Interrupt handlers for various ACM device responses | |
219 | */ | |
220 | ||
221 | /* control interface reports status changes with "interrupt" transfers */ | |
222 | static void acm_ctrl_irq(struct urb *urb, struct pt_regs *regs) | |
223 | { | |
224 | struct acm *acm = urb->context; | |
225 | struct usb_cdc_notification *dr = urb->transfer_buffer; | |
226 | unsigned char *data; | |
227 | int newctrl; | |
228 | int status; | |
229 | ||
230 | switch (urb->status) { | |
231 | case 0: | |
232 | /* success */ | |
233 | break; | |
234 | case -ECONNRESET: | |
235 | case -ENOENT: | |
236 | case -ESHUTDOWN: | |
237 | /* this urb is terminated, clean up */ | |
238 | dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); | |
239 | return; | |
240 | default: | |
241 | dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); | |
242 | goto exit; | |
243 | } | |
244 | ||
245 | if (!ACM_READY(acm)) | |
246 | goto exit; | |
247 | ||
248 | data = (unsigned char *)(dr + 1); | |
249 | switch (dr->bNotificationType) { | |
250 | ||
251 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: | |
252 | ||
253 | dbg("%s network", dr->wValue ? "connected to" : "disconnected from"); | |
254 | break; | |
255 | ||
256 | case USB_CDC_NOTIFY_SERIAL_STATE: | |
257 | ||
258 | newctrl = le16_to_cpu(get_unaligned((__le16 *) data)); | |
259 | ||
260 | if (acm->tty && !acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { | |
261 | dbg("calling hangup"); | |
262 | tty_hangup(acm->tty); | |
263 | } | |
264 | ||
265 | acm->ctrlin = newctrl; | |
266 | ||
267 | dbg("input control lines: dcd%c dsr%c break%c ring%c framing%c parity%c overrun%c", | |
268 | acm->ctrlin & ACM_CTRL_DCD ? '+' : '-', acm->ctrlin & ACM_CTRL_DSR ? '+' : '-', | |
269 | acm->ctrlin & ACM_CTRL_BRK ? '+' : '-', acm->ctrlin & ACM_CTRL_RI ? '+' : '-', | |
270 | acm->ctrlin & ACM_CTRL_FRAMING ? '+' : '-', acm->ctrlin & ACM_CTRL_PARITY ? '+' : '-', | |
271 | acm->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-'); | |
272 | ||
273 | break; | |
274 | ||
275 | default: | |
276 | dbg("unknown notification %d received: index %d len %d data0 %d data1 %d", | |
277 | dr->bNotificationType, dr->wIndex, | |
278 | dr->wLength, data[0], data[1]); | |
279 | break; | |
280 | } | |
281 | exit: | |
282 | status = usb_submit_urb (urb, GFP_ATOMIC); | |
283 | if (status) | |
284 | err ("%s - usb_submit_urb failed with result %d", | |
285 | __FUNCTION__, status); | |
286 | } | |
287 | ||
288 | /* data interface returns incoming bytes, or we got unthrottled */ | |
289 | static void acm_read_bulk(struct urb *urb, struct pt_regs *regs) | |
290 | { | |
61a87adf DK |
291 | struct acm_rb *buf; |
292 | struct acm_ru *rcv = urb->context; | |
293 | struct acm *acm = rcv->instance; | |
1da177e4 LT |
294 | dbg("Entering acm_read_bulk with status %d\n", urb->status); |
295 | ||
296 | if (!ACM_READY(acm)) | |
297 | return; | |
298 | ||
299 | if (urb->status) | |
300 | dev_dbg(&acm->data->dev, "bulk rx status %d\n", urb->status); | |
301 | ||
61a87adf DK |
302 | buf = rcv->buffer; |
303 | buf->size = urb->actual_length; | |
304 | ||
305 | spin_lock(&acm->read_lock); | |
306 | list_add_tail(&rcv->list, &acm->spare_read_urbs); | |
307 | list_add_tail(&buf->list, &acm->filled_read_bufs); | |
308 | spin_unlock(&acm->read_lock); | |
309 | ||
310 | tasklet_schedule(&acm->urb_task); | |
1da177e4 LT |
311 | } |
312 | ||
313 | static void acm_rx_tasklet(unsigned long _acm) | |
314 | { | |
315 | struct acm *acm = (void *)_acm; | |
61a87adf | 316 | struct acm_rb *buf; |
1da177e4 | 317 | struct tty_struct *tty = acm->tty; |
61a87adf DK |
318 | struct acm_ru *rcv; |
319 | //unsigned long flags; | |
1da177e4 LT |
320 | int i = 0; |
321 | dbg("Entering acm_rx_tasklet"); | |
322 | ||
61a87adf DK |
323 | if (!ACM_READY(acm) || acm->throttle) |
324 | return; | |
325 | ||
326 | next_buffer: | |
327 | spin_lock(&acm->read_lock); | |
328 | if (list_empty(&acm->filled_read_bufs)) { | |
329 | spin_unlock(&acm->read_lock); | |
330 | goto urbs; | |
1da177e4 | 331 | } |
61a87adf DK |
332 | buf = list_entry(acm->filled_read_bufs.next, |
333 | struct acm_rb, list); | |
334 | list_del(&buf->list); | |
335 | spin_unlock(&acm->read_lock); | |
336 | ||
337 | dbg("acm_rx_tasklet: procesing buf 0x%p, size = %d\n", buf, buf->size); | |
338 | ||
33f0f88f AC |
339 | tty_buffer_request_room(tty, buf->size); |
340 | if (!acm->throttle) | |
341 | tty_insert_flip_string(tty, buf->base, buf->size); | |
61a87adf | 342 | tty_flip_buffer_push(tty); |
1da177e4 LT |
343 | |
344 | spin_lock(&acm->throttle_lock); | |
345 | if (acm->throttle) { | |
346 | dbg("Throtteling noticed"); | |
61a87adf DK |
347 | memmove(buf->base, buf->base + i, buf->size - i); |
348 | buf->size -= i; | |
1da177e4 | 349 | spin_unlock(&acm->throttle_lock); |
61a87adf DK |
350 | spin_lock(&acm->read_lock); |
351 | list_add(&buf->list, &acm->filled_read_bufs); | |
352 | spin_unlock(&acm->read_lock); | |
1da177e4 LT |
353 | return; |
354 | } | |
355 | spin_unlock(&acm->throttle_lock); | |
356 | ||
61a87adf DK |
357 | spin_lock(&acm->read_lock); |
358 | list_add(&buf->list, &acm->spare_read_bufs); | |
359 | spin_unlock(&acm->read_lock); | |
360 | goto next_buffer; | |
361 | ||
362 | urbs: | |
363 | while (!list_empty(&acm->spare_read_bufs)) { | |
364 | spin_lock(&acm->read_lock); | |
365 | if (list_empty(&acm->spare_read_urbs)) { | |
366 | spin_unlock(&acm->read_lock); | |
367 | return; | |
368 | } | |
369 | rcv = list_entry(acm->spare_read_urbs.next, | |
370 | struct acm_ru, list); | |
371 | list_del(&rcv->list); | |
372 | spin_unlock(&acm->read_lock); | |
373 | ||
374 | buf = list_entry(acm->spare_read_bufs.next, | |
375 | struct acm_rb, list); | |
376 | list_del(&buf->list); | |
377 | ||
378 | rcv->buffer = buf; | |
379 | ||
380 | usb_fill_bulk_urb(rcv->urb, acm->dev, | |
381 | acm->rx_endpoint, | |
382 | buf->base, | |
383 | acm->readsize, | |
384 | acm_read_bulk, rcv); | |
385 | rcv->urb->transfer_dma = buf->dma; | |
386 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
387 | ||
388 | dbg("acm_rx_tasklet: sending urb 0x%p, rcv 0x%p, buf 0x%p\n", rcv->urb, rcv, buf); | |
389 | ||
390 | /* This shouldn't kill the driver as unsuccessful URBs are returned to the | |
391 | free-urbs-pool and resubmited ASAP */ | |
392 | if (usb_submit_urb(rcv->urb, GFP_ATOMIC) < 0) { | |
393 | list_add(&buf->list, &acm->spare_read_bufs); | |
394 | spin_lock(&acm->read_lock); | |
395 | list_add(&rcv->list, &acm->spare_read_urbs); | |
396 | spin_unlock(&acm->read_lock); | |
397 | return; | |
398 | } | |
399 | } | |
1da177e4 LT |
400 | } |
401 | ||
402 | /* data interface wrote those outgoing bytes */ | |
403 | static void acm_write_bulk(struct urb *urb, struct pt_regs *regs) | |
404 | { | |
405 | struct acm *acm = (struct acm *)urb->context; | |
1da177e4 | 406 | |
884b600f | 407 | dbg("Entering acm_write_bulk with status %d\n", urb->status); |
1da177e4 | 408 | |
884b600f ON |
409 | acm_write_done(acm); |
410 | acm_write_start(acm); | |
411 | if (ACM_READY(acm)) | |
412 | schedule_work(&acm->work); | |
1da177e4 LT |
413 | } |
414 | ||
415 | static void acm_softint(void *private) | |
416 | { | |
417 | struct acm *acm = private; | |
418 | dbg("Entering acm_softint.\n"); | |
419 | ||
420 | if (!ACM_READY(acm)) | |
421 | return; | |
422 | tty_wakeup(acm->tty); | |
423 | } | |
424 | ||
425 | /* | |
426 | * TTY handlers | |
427 | */ | |
428 | ||
429 | static int acm_tty_open(struct tty_struct *tty, struct file *filp) | |
430 | { | |
431 | struct acm *acm; | |
432 | int rv = -EINVAL; | |
61a87adf | 433 | int i; |
1da177e4 | 434 | dbg("Entering acm_tty_open.\n"); |
4186ecf8 AV |
435 | |
436 | mutex_lock(&open_mutex); | |
1da177e4 LT |
437 | |
438 | acm = acm_table[tty->index]; | |
439 | if (!acm || !acm->dev) | |
440 | goto err_out; | |
441 | else | |
442 | rv = 0; | |
443 | ||
444 | tty->driver_data = acm; | |
445 | acm->tty = tty; | |
446 | ||
61a87adf DK |
447 | /* force low_latency on so that our tty_push actually forces the data through, |
448 | otherwise it is scheduled, and with high data rates data can get lost. */ | |
449 | tty->low_latency = 1; | |
1da177e4 LT |
450 | |
451 | if (acm->used++) { | |
452 | goto done; | |
453 | } | |
454 | ||
455 | acm->ctrlurb->dev = acm->dev; | |
456 | if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) { | |
457 | dbg("usb_submit_urb(ctrl irq) failed"); | |
458 | goto bail_out; | |
459 | } | |
460 | ||
1da177e4 LT |
461 | if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS)) |
462 | goto full_bailout; | |
463 | ||
61a87adf DK |
464 | INIT_LIST_HEAD(&acm->spare_read_urbs); |
465 | INIT_LIST_HEAD(&acm->spare_read_bufs); | |
466 | INIT_LIST_HEAD(&acm->filled_read_bufs); | |
467 | for (i = 0; i < ACM_NRU; i++) { | |
468 | list_add(&(acm->ru[i].list), &acm->spare_read_urbs); | |
469 | } | |
470 | for (i = 0; i < ACM_NRB; i++) { | |
471 | list_add(&(acm->rb[i].list), &acm->spare_read_bufs); | |
472 | } | |
473 | ||
474 | tasklet_schedule(&acm->urb_task); | |
1da177e4 LT |
475 | |
476 | done: | |
477 | err_out: | |
4186ecf8 | 478 | mutex_unlock(&open_mutex); |
1da177e4 LT |
479 | return rv; |
480 | ||
481 | full_bailout: | |
1da177e4 LT |
482 | usb_kill_urb(acm->ctrlurb); |
483 | bail_out: | |
484 | acm->used--; | |
4186ecf8 | 485 | mutex_unlock(&open_mutex); |
1da177e4 LT |
486 | return -EIO; |
487 | } | |
488 | ||
83ef344a | 489 | static void acm_tty_unregister(struct acm *acm) |
490 | { | |
61a87adf DK |
491 | int i; |
492 | ||
83ef344a | 493 | tty_unregister_device(acm_tty_driver, acm->minor); |
494 | usb_put_intf(acm->control); | |
495 | acm_table[acm->minor] = NULL; | |
496 | usb_free_urb(acm->ctrlurb); | |
83ef344a | 497 | usb_free_urb(acm->writeurb); |
61a87adf DK |
498 | for (i = 0; i < ACM_NRU; i++) |
499 | usb_free_urb(acm->ru[i].urb); | |
83ef344a | 500 | kfree(acm); |
501 | } | |
502 | ||
1da177e4 LT |
503 | static void acm_tty_close(struct tty_struct *tty, struct file *filp) |
504 | { | |
505 | struct acm *acm = tty->driver_data; | |
61a87adf | 506 | int i; |
1da177e4 LT |
507 | |
508 | if (!acm || !acm->used) | |
509 | return; | |
510 | ||
4186ecf8 | 511 | mutex_lock(&open_mutex); |
1da177e4 LT |
512 | if (!--acm->used) { |
513 | if (acm->dev) { | |
514 | acm_set_control(acm, acm->ctrlout = 0); | |
515 | usb_kill_urb(acm->ctrlurb); | |
516 | usb_kill_urb(acm->writeurb); | |
61a87adf DK |
517 | for (i = 0; i < ACM_NRU; i++) |
518 | usb_kill_urb(acm->ru[i].urb); | |
83ef344a | 519 | } else |
520 | acm_tty_unregister(acm); | |
1da177e4 | 521 | } |
4186ecf8 | 522 | mutex_unlock(&open_mutex); |
1da177e4 LT |
523 | } |
524 | ||
525 | static int acm_tty_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
526 | { | |
527 | struct acm *acm = tty->driver_data; | |
528 | int stat; | |
884b600f ON |
529 | unsigned long flags; |
530 | int wbn; | |
531 | struct acm_wb *wb; | |
532 | ||
1da177e4 LT |
533 | dbg("Entering acm_tty_write to write %d bytes,\n", count); |
534 | ||
535 | if (!ACM_READY(acm)) | |
536 | return -EINVAL; | |
1da177e4 LT |
537 | if (!count) |
538 | return 0; | |
539 | ||
884b600f ON |
540 | spin_lock_irqsave(&acm->write_lock, flags); |
541 | if ((wbn = acm_wb_alloc(acm)) < 0) { | |
542 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
543 | acm_write_start(acm); | |
544 | return 0; | |
545 | } | |
546 | wb = &acm->wb[wbn]; | |
1da177e4 | 547 | |
884b600f | 548 | count = (count > acm->writesize) ? acm->writesize : count; |
1da177e4 | 549 | dbg("Get %d bytes...", count); |
884b600f ON |
550 | memcpy(wb->buf, buf, count); |
551 | wb->len = count; | |
552 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
1da177e4 | 553 | |
884b600f | 554 | if ((stat = acm_write_start(acm)) < 0) |
1da177e4 | 555 | return stat; |
1da177e4 LT |
556 | return count; |
557 | } | |
558 | ||
559 | static int acm_tty_write_room(struct tty_struct *tty) | |
560 | { | |
561 | struct acm *acm = tty->driver_data; | |
562 | if (!ACM_READY(acm)) | |
563 | return -EINVAL; | |
884b600f ON |
564 | /* |
565 | * Do not let the line discipline to know that we have a reserve, | |
566 | * or it might get too enthusiastic. | |
567 | */ | |
568 | return (acm->write_ready && acm_wb_is_avail(acm)) ? acm->writesize : 0; | |
1da177e4 LT |
569 | } |
570 | ||
571 | static int acm_tty_chars_in_buffer(struct tty_struct *tty) | |
572 | { | |
573 | struct acm *acm = tty->driver_data; | |
574 | if (!ACM_READY(acm)) | |
575 | return -EINVAL; | |
884b600f ON |
576 | /* |
577 | * This is inaccurate (overcounts), but it works. | |
578 | */ | |
579 | return (ACM_NWB - acm_wb_is_avail(acm)) * acm->writesize; | |
1da177e4 LT |
580 | } |
581 | ||
582 | static void acm_tty_throttle(struct tty_struct *tty) | |
583 | { | |
584 | struct acm *acm = tty->driver_data; | |
585 | if (!ACM_READY(acm)) | |
586 | return; | |
587 | spin_lock_bh(&acm->throttle_lock); | |
588 | acm->throttle = 1; | |
589 | spin_unlock_bh(&acm->throttle_lock); | |
590 | } | |
591 | ||
592 | static void acm_tty_unthrottle(struct tty_struct *tty) | |
593 | { | |
594 | struct acm *acm = tty->driver_data; | |
595 | if (!ACM_READY(acm)) | |
596 | return; | |
597 | spin_lock_bh(&acm->throttle_lock); | |
598 | acm->throttle = 0; | |
599 | spin_unlock_bh(&acm->throttle_lock); | |
61a87adf | 600 | tasklet_schedule(&acm->urb_task); |
1da177e4 LT |
601 | } |
602 | ||
603 | static void acm_tty_break_ctl(struct tty_struct *tty, int state) | |
604 | { | |
605 | struct acm *acm = tty->driver_data; | |
606 | if (!ACM_READY(acm)) | |
607 | return; | |
608 | if (acm_send_break(acm, state ? 0xffff : 0)) | |
609 | dbg("send break failed"); | |
610 | } | |
611 | ||
612 | static int acm_tty_tiocmget(struct tty_struct *tty, struct file *file) | |
613 | { | |
614 | struct acm *acm = tty->driver_data; | |
615 | ||
616 | if (!ACM_READY(acm)) | |
617 | return -EINVAL; | |
618 | ||
619 | return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | | |
620 | (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | | |
621 | (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | | |
622 | (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | | |
623 | (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | | |
624 | TIOCM_CTS; | |
625 | } | |
626 | ||
627 | static int acm_tty_tiocmset(struct tty_struct *tty, struct file *file, | |
628 | unsigned int set, unsigned int clear) | |
629 | { | |
630 | struct acm *acm = tty->driver_data; | |
631 | unsigned int newctrl; | |
632 | ||
633 | if (!ACM_READY(acm)) | |
634 | return -EINVAL; | |
635 | ||
636 | newctrl = acm->ctrlout; | |
637 | set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); | |
638 | clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); | |
639 | ||
640 | newctrl = (newctrl & ~clear) | set; | |
641 | ||
642 | if (acm->ctrlout == newctrl) | |
643 | return 0; | |
644 | return acm_set_control(acm, acm->ctrlout = newctrl); | |
645 | } | |
646 | ||
647 | static int acm_tty_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) | |
648 | { | |
649 | struct acm *acm = tty->driver_data; | |
650 | ||
651 | if (!ACM_READY(acm)) | |
652 | return -EINVAL; | |
653 | ||
654 | return -ENOIOCTLCMD; | |
655 | } | |
656 | ||
4c4c9432 | 657 | static const __u32 acm_tty_speed[] = { |
1da177e4 LT |
658 | 0, 50, 75, 110, 134, 150, 200, 300, 600, |
659 | 1200, 1800, 2400, 4800, 9600, 19200, 38400, | |
660 | 57600, 115200, 230400, 460800, 500000, 576000, | |
661 | 921600, 1000000, 1152000, 1500000, 2000000, | |
662 | 2500000, 3000000, 3500000, 4000000 | |
663 | }; | |
664 | ||
4c4c9432 | 665 | static const __u8 acm_tty_size[] = { |
1da177e4 LT |
666 | 5, 6, 7, 8 |
667 | }; | |
668 | ||
669 | static void acm_tty_set_termios(struct tty_struct *tty, struct termios *termios_old) | |
670 | { | |
671 | struct acm *acm = tty->driver_data; | |
672 | struct termios *termios = tty->termios; | |
673 | struct usb_cdc_line_coding newline; | |
674 | int newctrl = acm->ctrlout; | |
675 | ||
676 | if (!ACM_READY(acm)) | |
677 | return; | |
678 | ||
679 | newline.dwDTERate = cpu_to_le32p(acm_tty_speed + | |
680 | (termios->c_cflag & CBAUD & ~CBAUDEX) + (termios->c_cflag & CBAUDEX ? 15 : 0)); | |
681 | newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; | |
682 | newline.bParityType = termios->c_cflag & PARENB ? | |
683 | (termios->c_cflag & PARODD ? 1 : 2) + (termios->c_cflag & CMSPAR ? 2 : 0) : 0; | |
684 | newline.bDataBits = acm_tty_size[(termios->c_cflag & CSIZE) >> 4]; | |
685 | ||
686 | acm->clocal = ((termios->c_cflag & CLOCAL) != 0); | |
687 | ||
688 | if (!newline.dwDTERate) { | |
689 | newline.dwDTERate = acm->line.dwDTERate; | |
690 | newctrl &= ~ACM_CTRL_DTR; | |
691 | } else newctrl |= ACM_CTRL_DTR; | |
692 | ||
693 | if (newctrl != acm->ctrlout) | |
694 | acm_set_control(acm, acm->ctrlout = newctrl); | |
695 | ||
696 | if (memcmp(&acm->line, &newline, sizeof newline)) { | |
697 | memcpy(&acm->line, &newline, sizeof newline); | |
698 | dbg("set line: %d %d %d %d", le32_to_cpu(newline.dwDTERate), | |
699 | newline.bCharFormat, newline.bParityType, | |
700 | newline.bDataBits); | |
701 | acm_set_line(acm, &acm->line); | |
702 | } | |
703 | } | |
704 | ||
705 | /* | |
706 | * USB probe and disconnect routines. | |
707 | */ | |
708 | ||
884b600f ON |
709 | /* Little helper: write buffers free */ |
710 | static void acm_write_buffers_free(struct acm *acm) | |
711 | { | |
712 | int i; | |
713 | struct acm_wb *wb; | |
714 | ||
715 | for (wb = &acm->wb[0], i = 0; i < ACM_NWB; i++, wb++) { | |
716 | usb_buffer_free(acm->dev, acm->writesize, wb->buf, wb->dmah); | |
717 | } | |
718 | } | |
719 | ||
720 | /* Little helper: write buffers allocate */ | |
721 | static int acm_write_buffers_alloc(struct acm *acm) | |
722 | { | |
723 | int i; | |
724 | struct acm_wb *wb; | |
725 | ||
726 | for (wb = &acm->wb[0], i = 0; i < ACM_NWB; i++, wb++) { | |
727 | wb->buf = usb_buffer_alloc(acm->dev, acm->writesize, GFP_KERNEL, | |
728 | &wb->dmah); | |
729 | if (!wb->buf) { | |
730 | while (i != 0) { | |
731 | --i; | |
732 | --wb; | |
733 | usb_buffer_free(acm->dev, acm->writesize, | |
734 | wb->buf, wb->dmah); | |
735 | } | |
736 | return -ENOMEM; | |
737 | } | |
738 | } | |
739 | return 0; | |
740 | } | |
741 | ||
1da177e4 LT |
742 | static int acm_probe (struct usb_interface *intf, |
743 | const struct usb_device_id *id) | |
744 | { | |
745 | struct usb_cdc_union_desc *union_header = NULL; | |
746 | char *buffer = intf->altsetting->extra; | |
747 | int buflen = intf->altsetting->extralen; | |
748 | struct usb_interface *control_interface; | |
749 | struct usb_interface *data_interface; | |
750 | struct usb_endpoint_descriptor *epctrl; | |
751 | struct usb_endpoint_descriptor *epread; | |
752 | struct usb_endpoint_descriptor *epwrite; | |
753 | struct usb_device *usb_dev = interface_to_usbdev(intf); | |
754 | struct acm *acm; | |
755 | int minor; | |
756 | int ctrlsize,readsize; | |
757 | u8 *buf; | |
758 | u8 ac_management_function = 0; | |
759 | u8 call_management_function = 0; | |
760 | int call_interface_num = -1; | |
761 | int data_interface_num; | |
762 | unsigned long quirks; | |
61a87adf | 763 | int i; |
1da177e4 LT |
764 | |
765 | /* handle quirks deadly to normal probing*/ | |
766 | quirks = (unsigned long)id->driver_info; | |
767 | if (quirks == NO_UNION_NORMAL) { | |
768 | data_interface = usb_ifnum_to_if(usb_dev, 1); | |
769 | control_interface = usb_ifnum_to_if(usb_dev, 0); | |
770 | goto skip_normal_probe; | |
771 | } | |
772 | ||
773 | /* normal probing*/ | |
774 | if (!buffer) { | |
775 | err("Wierd descriptor references\n"); | |
776 | return -EINVAL; | |
777 | } | |
778 | ||
779 | if (!buflen) { | |
780 | if (intf->cur_altsetting->endpoint->extralen && intf->cur_altsetting->endpoint->extra) { | |
781 | dev_dbg(&intf->dev,"Seeking extra descriptors on endpoint\n"); | |
782 | buflen = intf->cur_altsetting->endpoint->extralen; | |
783 | buffer = intf->cur_altsetting->endpoint->extra; | |
784 | } else { | |
785 | err("Zero length descriptor references\n"); | |
786 | return -EINVAL; | |
787 | } | |
788 | } | |
789 | ||
790 | while (buflen > 0) { | |
791 | if (buffer [1] != USB_DT_CS_INTERFACE) { | |
792 | err("skipping garbage\n"); | |
793 | goto next_desc; | |
794 | } | |
795 | ||
796 | switch (buffer [2]) { | |
797 | case USB_CDC_UNION_TYPE: /* we've found it */ | |
798 | if (union_header) { | |
799 | err("More than one union descriptor, skipping ..."); | |
800 | goto next_desc; | |
801 | } | |
802 | union_header = (struct usb_cdc_union_desc *) | |
803 | buffer; | |
804 | break; | |
805 | case USB_CDC_COUNTRY_TYPE: /* maybe somehow export */ | |
806 | break; /* for now we ignore it */ | |
807 | case USB_CDC_HEADER_TYPE: /* maybe check version */ | |
808 | break; /* for now we ignore it */ | |
809 | case USB_CDC_ACM_TYPE: | |
810 | ac_management_function = buffer[3]; | |
811 | break; | |
812 | case USB_CDC_CALL_MANAGEMENT_TYPE: | |
813 | call_management_function = buffer[3]; | |
814 | call_interface_num = buffer[4]; | |
815 | if ((call_management_function & 3) != 3) | |
816 | err("This device cannot do calls on its own. It is no modem."); | |
817 | break; | |
818 | ||
819 | default: | |
820 | err("Ignoring extra header, type %d, length %d", buffer[2], buffer[0]); | |
821 | break; | |
822 | } | |
823 | next_desc: | |
824 | buflen -= buffer[0]; | |
825 | buffer += buffer[0]; | |
826 | } | |
827 | ||
828 | if (!union_header) { | |
829 | if (call_interface_num > 0) { | |
830 | dev_dbg(&intf->dev,"No union descriptor, using call management descriptor\n"); | |
831 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); | |
832 | control_interface = intf; | |
833 | } else { | |
834 | dev_dbg(&intf->dev,"No union descriptor, giving up\n"); | |
835 | return -ENODEV; | |
836 | } | |
837 | } else { | |
838 | control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); | |
839 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); | |
840 | if (!control_interface || !data_interface) { | |
841 | dev_dbg(&intf->dev,"no interfaces\n"); | |
842 | return -ENODEV; | |
843 | } | |
844 | } | |
845 | ||
846 | if (data_interface_num != call_interface_num) | |
847 | dev_dbg(&intf->dev,"Seperate call control interface. That is not fully supported.\n"); | |
848 | ||
849 | skip_normal_probe: | |
850 | ||
851 | /*workaround for switched interfaces */ | |
852 | if (data_interface->cur_altsetting->desc.bInterfaceClass != CDC_DATA_INTERFACE_TYPE) { | |
853 | if (control_interface->cur_altsetting->desc.bInterfaceClass == CDC_DATA_INTERFACE_TYPE) { | |
854 | struct usb_interface *t; | |
855 | dev_dbg(&intf->dev,"Your device has switched interfaces.\n"); | |
856 | ||
857 | t = control_interface; | |
858 | control_interface = data_interface; | |
859 | data_interface = t; | |
860 | } else { | |
861 | return -EINVAL; | |
862 | } | |
863 | } | |
864 | ||
865 | if (usb_interface_claimed(data_interface)) { /* valid in this context */ | |
866 | dev_dbg(&intf->dev,"The data interface isn't available\n"); | |
867 | return -EBUSY; | |
868 | } | |
869 | ||
870 | ||
871 | if (data_interface->cur_altsetting->desc.bNumEndpoints < 2) | |
872 | return -EINVAL; | |
873 | ||
874 | epctrl = &control_interface->cur_altsetting->endpoint[0].desc; | |
875 | epread = &data_interface->cur_altsetting->endpoint[0].desc; | |
876 | epwrite = &data_interface->cur_altsetting->endpoint[1].desc; | |
877 | ||
878 | ||
879 | /* workaround for switched endpoints */ | |
880 | if ((epread->bEndpointAddress & USB_DIR_IN) != USB_DIR_IN) { | |
881 | /* descriptors are swapped */ | |
882 | struct usb_endpoint_descriptor *t; | |
883 | dev_dbg(&intf->dev,"The data interface has switched endpoints\n"); | |
884 | ||
885 | t = epread; | |
886 | epread = epwrite; | |
887 | epwrite = t; | |
888 | } | |
889 | dbg("interfaces are valid"); | |
890 | for (minor = 0; minor < ACM_TTY_MINORS && acm_table[minor]; minor++); | |
891 | ||
892 | if (minor == ACM_TTY_MINORS) { | |
893 | err("no more free acm devices"); | |
894 | return -ENODEV; | |
895 | } | |
896 | ||
46f116ea ON |
897 | if (!(acm = kzalloc(sizeof(struct acm), GFP_KERNEL))) { |
898 | dev_dbg(&intf->dev, "out of memory (acm kzalloc)\n"); | |
1da177e4 LT |
899 | goto alloc_fail; |
900 | } | |
1da177e4 LT |
901 | |
902 | ctrlsize = le16_to_cpu(epctrl->wMaxPacketSize); | |
61a87adf | 903 | readsize = le16_to_cpu(epread->wMaxPacketSize)*2; |
1da177e4 LT |
904 | acm->writesize = le16_to_cpu(epwrite->wMaxPacketSize); |
905 | acm->control = control_interface; | |
906 | acm->data = data_interface; | |
907 | acm->minor = minor; | |
908 | acm->dev = usb_dev; | |
909 | acm->ctrl_caps = ac_management_function; | |
910 | acm->ctrlsize = ctrlsize; | |
911 | acm->readsize = readsize; | |
61a87adf DK |
912 | acm->urb_task.func = acm_rx_tasklet; |
913 | acm->urb_task.data = (unsigned long) acm; | |
1da177e4 LT |
914 | INIT_WORK(&acm->work, acm_softint, acm); |
915 | spin_lock_init(&acm->throttle_lock); | |
884b600f | 916 | spin_lock_init(&acm->write_lock); |
61a87adf | 917 | spin_lock_init(&acm->read_lock); |
884b600f | 918 | acm->write_ready = 1; |
61a87adf | 919 | acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); |
1da177e4 LT |
920 | |
921 | buf = usb_buffer_alloc(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); | |
922 | if (!buf) { | |
923 | dev_dbg(&intf->dev, "out of memory (ctrl buffer alloc)\n"); | |
924 | goto alloc_fail2; | |
925 | } | |
926 | acm->ctrl_buffer = buf; | |
927 | ||
884b600f | 928 | if (acm_write_buffers_alloc(acm) < 0) { |
1da177e4 LT |
929 | dev_dbg(&intf->dev, "out of memory (write buffer alloc)\n"); |
930 | goto alloc_fail4; | |
931 | } | |
1da177e4 LT |
932 | |
933 | acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); | |
934 | if (!acm->ctrlurb) { | |
935 | dev_dbg(&intf->dev, "out of memory (ctrlurb kmalloc)\n"); | |
936 | goto alloc_fail5; | |
937 | } | |
61a87adf DK |
938 | for (i = 0; i < ACM_NRU; i++) { |
939 | struct acm_ru *rcv = &(acm->ru[i]); | |
940 | ||
941 | if (!(rcv->urb = usb_alloc_urb(0, GFP_KERNEL))) { | |
942 | dev_dbg(&intf->dev, "out of memory (read urbs usb_alloc_urb)\n"); | |
943 | goto alloc_fail7; | |
944 | } | |
945 | ||
946 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
947 | rcv->instance = acm; | |
948 | } | |
949 | for (i = 0; i < ACM_NRB; i++) { | |
950 | struct acm_rb *buf = &(acm->rb[i]); | |
951 | ||
952 | // Using usb_buffer_alloc instead of kmalloc as Oliver suggested | |
953 | if (!(buf->base = usb_buffer_alloc(acm->dev, readsize, GFP_KERNEL, &buf->dma))) { | |
954 | dev_dbg(&intf->dev, "out of memory (read bufs usb_buffer_alloc)\n"); | |
955 | goto alloc_fail7; | |
956 | } | |
1da177e4 LT |
957 | } |
958 | acm->writeurb = usb_alloc_urb(0, GFP_KERNEL); | |
959 | if (!acm->writeurb) { | |
960 | dev_dbg(&intf->dev, "out of memory (writeurb kmalloc)\n"); | |
961 | goto alloc_fail7; | |
962 | } | |
963 | ||
964 | usb_fill_int_urb(acm->ctrlurb, usb_dev, usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), | |
965 | acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, epctrl->bInterval); | |
966 | acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
967 | acm->ctrlurb->transfer_dma = acm->ctrl_dma; | |
968 | ||
1da177e4 | 969 | usb_fill_bulk_urb(acm->writeurb, usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), |
884b600f | 970 | NULL, acm->writesize, acm_write_bulk, acm); |
1da177e4 | 971 | acm->writeurb->transfer_flags |= URB_NO_FSBR | URB_NO_TRANSFER_DMA_MAP; |
1da177e4 LT |
972 | |
973 | dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); | |
974 | ||
975 | acm_set_control(acm, acm->ctrlout); | |
976 | ||
977 | acm->line.dwDTERate = cpu_to_le32(9600); | |
978 | acm->line.bDataBits = 8; | |
979 | acm_set_line(acm, &acm->line); | |
980 | ||
981 | usb_driver_claim_interface(&acm_driver, data_interface, acm); | |
982 | ||
83ef344a | 983 | usb_get_intf(control_interface); |
984 | tty_register_device(acm_tty_driver, minor, &control_interface->dev); | |
1da177e4 LT |
985 | |
986 | acm_table[minor] = acm; | |
987 | usb_set_intfdata (intf, acm); | |
988 | return 0; | |
989 | ||
990 | alloc_fail7: | |
61a87adf DK |
991 | for (i = 0; i < ACM_NRB; i++) |
992 | usb_buffer_free(usb_dev, acm->readsize, acm->rb[i].base, acm->rb[i].dma); | |
993 | for (i = 0; i < ACM_NRU; i++) | |
994 | usb_free_urb(acm->ru[i].urb); | |
1da177e4 LT |
995 | usb_free_urb(acm->ctrlurb); |
996 | alloc_fail5: | |
884b600f | 997 | acm_write_buffers_free(acm); |
1da177e4 | 998 | alloc_fail4: |
1da177e4 LT |
999 | usb_buffer_free(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); |
1000 | alloc_fail2: | |
1001 | kfree(acm); | |
1002 | alloc_fail: | |
1003 | return -ENOMEM; | |
1004 | } | |
1005 | ||
1006 | static void acm_disconnect(struct usb_interface *intf) | |
1007 | { | |
1008 | struct acm *acm = usb_get_intfdata (intf); | |
1009 | struct usb_device *usb_dev = interface_to_usbdev(intf); | |
61a87adf | 1010 | int i; |
1da177e4 LT |
1011 | |
1012 | if (!acm || !acm->dev) { | |
1013 | dbg("disconnect on nonexisting interface"); | |
1014 | return; | |
1015 | } | |
1016 | ||
4186ecf8 | 1017 | mutex_lock(&open_mutex); |
86067eea | 1018 | if (!usb_get_intfdata(intf)) { |
4186ecf8 | 1019 | mutex_unlock(&open_mutex); |
86067eea ON |
1020 | return; |
1021 | } | |
1da177e4 | 1022 | acm->dev = NULL; |
86067eea ON |
1023 | usb_set_intfdata(acm->control, NULL); |
1024 | usb_set_intfdata(acm->data, NULL); | |
1da177e4 | 1025 | |
61a87adf DK |
1026 | tasklet_disable(&acm->urb_task); |
1027 | ||
1da177e4 | 1028 | usb_kill_urb(acm->ctrlurb); |
1da177e4 | 1029 | usb_kill_urb(acm->writeurb); |
61a87adf DK |
1030 | for (i = 0; i < ACM_NRU; i++) |
1031 | usb_kill_urb(acm->ru[i].urb); | |
1032 | ||
1033 | INIT_LIST_HEAD(&acm->filled_read_bufs); | |
1034 | INIT_LIST_HEAD(&acm->spare_read_bufs); | |
1035 | ||
1036 | tasklet_enable(&acm->urb_task); | |
1da177e4 LT |
1037 | |
1038 | flush_scheduled_work(); /* wait for acm_softint */ | |
1039 | ||
884b600f | 1040 | acm_write_buffers_free(acm); |
1da177e4 | 1041 | usb_buffer_free(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); |
61a87adf DK |
1042 | for (i = 0; i < ACM_NRB; i++) |
1043 | usb_buffer_free(usb_dev, acm->readsize, acm->rb[i].base, acm->rb[i].dma); | |
1da177e4 | 1044 | |
86067eea | 1045 | usb_driver_release_interface(&acm_driver, intf == acm->control ? acm->data : intf); |
1da177e4 LT |
1046 | |
1047 | if (!acm->used) { | |
83ef344a | 1048 | acm_tty_unregister(acm); |
4186ecf8 | 1049 | mutex_unlock(&open_mutex); |
1da177e4 LT |
1050 | return; |
1051 | } | |
1052 | ||
4186ecf8 | 1053 | mutex_unlock(&open_mutex); |
1da177e4 LT |
1054 | |
1055 | if (acm->tty) | |
1056 | tty_hangup(acm->tty); | |
1057 | } | |
1058 | ||
1059 | /* | |
1060 | * USB driver structure. | |
1061 | */ | |
1062 | ||
1063 | static struct usb_device_id acm_ids[] = { | |
1064 | /* quirky and broken devices */ | |
1065 | { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ | |
1066 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1067 | }, | |
8753e65e MO |
1068 | { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ |
1069 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1070 | }, | |
1da177e4 LT |
1071 | /* control interfaces with various AT-command sets */ |
1072 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1073 | USB_CDC_ACM_PROTO_AT_V25TER) }, | |
1074 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1075 | USB_CDC_ACM_PROTO_AT_PCCA101) }, | |
1076 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1077 | USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, | |
1078 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1079 | USB_CDC_ACM_PROTO_AT_GSM) }, | |
1080 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1081 | USB_CDC_ACM_PROTO_AT_3G ) }, | |
1082 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1083 | USB_CDC_ACM_PROTO_AT_CDMA) }, | |
1084 | ||
1085 | /* NOTE: COMM/ACM/0xff is likely MSFT RNDIS ... NOT a modem!! */ | |
1086 | { } | |
1087 | }; | |
1088 | ||
1089 | MODULE_DEVICE_TABLE (usb, acm_ids); | |
1090 | ||
1091 | static struct usb_driver acm_driver = { | |
1da177e4 LT |
1092 | .name = "cdc_acm", |
1093 | .probe = acm_probe, | |
1094 | .disconnect = acm_disconnect, | |
1095 | .id_table = acm_ids, | |
1096 | }; | |
1097 | ||
1098 | /* | |
1099 | * TTY driver structures. | |
1100 | */ | |
1101 | ||
1102 | static struct tty_operations acm_ops = { | |
1103 | .open = acm_tty_open, | |
1104 | .close = acm_tty_close, | |
1105 | .write = acm_tty_write, | |
1106 | .write_room = acm_tty_write_room, | |
1107 | .ioctl = acm_tty_ioctl, | |
1108 | .throttle = acm_tty_throttle, | |
1109 | .unthrottle = acm_tty_unthrottle, | |
1110 | .chars_in_buffer = acm_tty_chars_in_buffer, | |
1111 | .break_ctl = acm_tty_break_ctl, | |
1112 | .set_termios = acm_tty_set_termios, | |
1113 | .tiocmget = acm_tty_tiocmget, | |
1114 | .tiocmset = acm_tty_tiocmset, | |
1115 | }; | |
1116 | ||
1117 | /* | |
1118 | * Init / exit. | |
1119 | */ | |
1120 | ||
1121 | static int __init acm_init(void) | |
1122 | { | |
1123 | int retval; | |
1124 | acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); | |
1125 | if (!acm_tty_driver) | |
1126 | return -ENOMEM; | |
1127 | acm_tty_driver->owner = THIS_MODULE, | |
1128 | acm_tty_driver->driver_name = "acm", | |
1129 | acm_tty_driver->name = "ttyACM", | |
1130 | acm_tty_driver->devfs_name = "usb/acm/", | |
1131 | acm_tty_driver->major = ACM_TTY_MAJOR, | |
1132 | acm_tty_driver->minor_start = 0, | |
1133 | acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, | |
1134 | acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, | |
1135 | acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS, | |
1136 | acm_tty_driver->init_termios = tty_std_termios; | |
1137 | acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
1138 | tty_set_operations(acm_tty_driver, &acm_ops); | |
1139 | ||
1140 | retval = tty_register_driver(acm_tty_driver); | |
1141 | if (retval) { | |
1142 | put_tty_driver(acm_tty_driver); | |
1143 | return retval; | |
1144 | } | |
1145 | ||
1146 | retval = usb_register(&acm_driver); | |
1147 | if (retval) { | |
1148 | tty_unregister_driver(acm_tty_driver); | |
1149 | put_tty_driver(acm_tty_driver); | |
1150 | return retval; | |
1151 | } | |
1152 | ||
1153 | info(DRIVER_VERSION ":" DRIVER_DESC); | |
1154 | ||
1155 | return 0; | |
1156 | } | |
1157 | ||
1158 | static void __exit acm_exit(void) | |
1159 | { | |
1160 | usb_deregister(&acm_driver); | |
1161 | tty_unregister_driver(acm_tty_driver); | |
1162 | put_tty_driver(acm_tty_driver); | |
1163 | } | |
1164 | ||
1165 | module_init(acm_init); | |
1166 | module_exit(acm_exit); | |
1167 | ||
1168 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1169 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1170 | MODULE_LICENSE("GPL"); | |
1171 |