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>
9 * Copyright (c) 2005 David Kubicek <dave@awk.cz>
11 * USB Abstract Control Model driver for USB modems and ISDN adapters
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
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
34 * v0.25 - downstream tasks paralelized to maximize throughput
35 * v0.26 - multiple write urbs, writesize increased
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.
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.
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
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>
62 #include <linux/tty_driver.h>
63 #include <linux/tty_flip.h>
64 #include <linux/module.h>
65 #include <linux/mutex.h>
66 #include <linux/uaccess.h>
67 #include <linux/usb.h>
68 #include <linux/usb/cdc.h>
69 #include <asm/byteorder.h>
70 #include <asm/unaligned.h>
71 #include <linux/list.h>
76 #define ACM_CLOSE_TIMEOUT 15 /* seconds to let writes drain */
81 #define DRIVER_VERSION "v0.26"
82 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek"
83 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
85 static struct usb_driver acm_driver;
86 static struct tty_driver *acm_tty_driver;
87 static struct acm *acm_table[ACM_TTY_MINORS];
89 static DEFINE_MUTEX(open_mutex);
91 #define ACM_READY(acm) (acm && acm->dev && acm->port.count)
93 static const struct tty_port_operations acm_port_ops = {
103 * Functions for ACM control messages.
106 static int acm_ctrl_msg(struct acm *acm, int request, int value,
109 int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
110 request, USB_RT_ACM, value,
111 acm->control->altsetting[0].desc.bInterfaceNumber,
113 dbg("acm_control_msg: rq: 0x%02x val: %#x len: %#x result: %d",
114 request, value, len, retval);
115 return retval < 0 ? retval : 0;
118 /* devices aren't required to support these requests.
119 * the cdc acm descriptor tells whether they do...
121 #define acm_set_control(acm, control) \
122 acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0)
123 #define acm_set_line(acm, line) \
124 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
125 #define acm_send_break(acm, ms) \
126 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
129 * Write buffer management.
130 * All of these assume proper locks taken by the caller.
133 static int acm_wb_alloc(struct acm *acm)
146 wbn = (wbn + 1) % ACM_NW;
152 static int acm_wb_is_avail(struct acm *acm)
158 spin_lock_irqsave(&acm->write_lock, flags);
159 for (i = 0; i < ACM_NW; i++)
161 spin_unlock_irqrestore(&acm->write_lock, flags);
166 * Finish write. Caller must hold acm->write_lock
168 static void acm_write_done(struct acm *acm, struct acm_wb *wb)
177 * the caller is responsible for locking
180 static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
186 wb->urb->transfer_buffer = wb->buf;
187 wb->urb->transfer_dma = wb->dmah;
188 wb->urb->transfer_buffer_length = wb->len;
189 wb->urb->dev = acm->dev;
191 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
193 dbg("usb_submit_urb(write bulk) failed: %d", rc);
194 acm_write_done(acm, wb);
199 static int acm_write_start(struct acm *acm, int wbn)
202 struct acm_wb *wb = &acm->wb[wbn];
205 spin_lock_irqsave(&acm->write_lock, flags);
208 spin_unlock_irqrestore(&acm->write_lock, flags);
212 dbg("%s susp_count: %d", __func__, acm->susp_count);
213 if (acm->susp_count) {
214 acm->delayed_wb = wb;
215 schedule_work(&acm->waker);
216 spin_unlock_irqrestore(&acm->write_lock, flags);
217 return 0; /* A white lie */
219 usb_mark_last_busy(acm->dev);
221 rc = acm_start_wb(acm, wb);
222 spin_unlock_irqrestore(&acm->write_lock, flags);
228 * attributes exported through sysfs
230 static ssize_t show_caps
231 (struct device *dev, struct device_attribute *attr, char *buf)
233 struct usb_interface *intf = to_usb_interface(dev);
234 struct acm *acm = usb_get_intfdata(intf);
236 return sprintf(buf, "%d", acm->ctrl_caps);
238 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
240 static ssize_t show_country_codes
241 (struct device *dev, struct device_attribute *attr, char *buf)
243 struct usb_interface *intf = to_usb_interface(dev);
244 struct acm *acm = usb_get_intfdata(intf);
246 memcpy(buf, acm->country_codes, acm->country_code_size);
247 return acm->country_code_size;
250 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
252 static ssize_t show_country_rel_date
253 (struct device *dev, struct device_attribute *attr, char *buf)
255 struct usb_interface *intf = to_usb_interface(dev);
256 struct acm *acm = usb_get_intfdata(intf);
258 return sprintf(buf, "%d", acm->country_rel_date);
261 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
263 * Interrupt handlers for various ACM device responses
266 /* control interface reports status changes with "interrupt" transfers */
267 static void acm_ctrl_irq(struct urb *urb)
269 struct acm *acm = urb->context;
270 struct usb_cdc_notification *dr = urb->transfer_buffer;
271 struct tty_struct *tty;
275 int status = urb->status;
284 /* this urb is terminated, clean up */
285 dbg("%s - urb shutting down with status: %d", __func__, status);
288 dbg("%s - nonzero urb status received: %d", __func__, status);
295 data = (unsigned char *)(dr + 1);
296 switch (dr->bNotificationType) {
297 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
298 dbg("%s network", dr->wValue ?
299 "connected to" : "disconnected from");
302 case USB_CDC_NOTIFY_SERIAL_STATE:
303 tty = tty_port_tty_get(&acm->port);
304 newctrl = get_unaligned_le16(data);
308 (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
309 dbg("calling hangup");
315 acm->ctrlin = newctrl;
317 dbg("input control lines: dcd%c dsr%c break%c ring%c framing%c parity%c overrun%c",
318 acm->ctrlin & ACM_CTRL_DCD ? '+' : '-',
319 acm->ctrlin & ACM_CTRL_DSR ? '+' : '-',
320 acm->ctrlin & ACM_CTRL_BRK ? '+' : '-',
321 acm->ctrlin & ACM_CTRL_RI ? '+' : '-',
322 acm->ctrlin & ACM_CTRL_FRAMING ? '+' : '-',
323 acm->ctrlin & ACM_CTRL_PARITY ? '+' : '-',
324 acm->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-');
328 dbg("unknown notification %d received: index %d len %d data0 %d data1 %d",
329 dr->bNotificationType, dr->wIndex,
330 dr->wLength, data[0], data[1]);
334 usb_mark_last_busy(acm->dev);
335 retval = usb_submit_urb(urb, GFP_ATOMIC);
337 dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with "
338 "result %d", __func__, retval);
341 /* data interface returns incoming bytes, or we got unthrottled */
342 static void acm_read_bulk(struct urb *urb)
345 struct acm_ru *rcv = urb->context;
346 struct acm *acm = rcv->instance;
347 int status = urb->status;
349 dbg("Entering acm_read_bulk with status %d", status);
351 if (!ACM_READY(acm)) {
352 dev_dbg(&acm->data->dev, "Aborting, acm not ready");
355 usb_mark_last_busy(acm->dev);
358 dev_dbg(&acm->data->dev, "bulk rx status %d\n", status);
361 buf->size = urb->actual_length;
363 if (likely(status == 0)) {
364 spin_lock(&acm->read_lock);
366 list_add_tail(&rcv->list, &acm->spare_read_urbs);
367 list_add_tail(&buf->list, &acm->filled_read_bufs);
368 spin_unlock(&acm->read_lock);
370 /* we drop the buffer due to an error */
371 spin_lock(&acm->read_lock);
372 list_add_tail(&rcv->list, &acm->spare_read_urbs);
373 list_add(&buf->list, &acm->spare_read_bufs);
374 spin_unlock(&acm->read_lock);
375 /* nevertheless the tasklet must be kicked unconditionally
376 so the queue cannot dry up */
378 if (likely(!acm->susp_count))
379 tasklet_schedule(&acm->urb_task);
382 static void acm_rx_tasklet(unsigned long _acm)
384 struct acm *acm = (void *)_acm;
386 struct tty_struct *tty;
389 unsigned char throttled;
391 dbg("Entering acm_rx_tasklet");
393 if (!ACM_READY(acm)) {
394 dbg("acm_rx_tasklet: ACM not ready");
398 spin_lock_irqsave(&acm->throttle_lock, flags);
399 throttled = acm->throttle;
400 spin_unlock_irqrestore(&acm->throttle_lock, flags);
402 dbg("acm_rx_tasklet: throttled");
406 tty = tty_port_tty_get(&acm->port);
409 spin_lock_irqsave(&acm->read_lock, flags);
410 if (list_empty(&acm->filled_read_bufs)) {
411 spin_unlock_irqrestore(&acm->read_lock, flags);
414 buf = list_entry(acm->filled_read_bufs.next,
415 struct acm_rb, list);
416 list_del(&buf->list);
417 spin_unlock_irqrestore(&acm->read_lock, flags);
419 dbg("acm_rx_tasklet: procesing buf 0x%p, size = %d", buf, buf->size);
422 spin_lock_irqsave(&acm->throttle_lock, flags);
423 throttled = acm->throttle;
424 spin_unlock_irqrestore(&acm->throttle_lock, flags);
426 tty_buffer_request_room(tty, buf->size);
427 tty_insert_flip_string(tty, buf->base, buf->size);
428 tty_flip_buffer_push(tty);
431 dbg("Throttling noticed");
432 spin_lock_irqsave(&acm->read_lock, flags);
433 list_add(&buf->list, &acm->filled_read_bufs);
434 spin_unlock_irqrestore(&acm->read_lock, flags);
439 spin_lock_irqsave(&acm->read_lock, flags);
440 list_add(&buf->list, &acm->spare_read_bufs);
441 spin_unlock_irqrestore(&acm->read_lock, flags);
447 while (!list_empty(&acm->spare_read_bufs)) {
448 spin_lock_irqsave(&acm->read_lock, flags);
449 if (list_empty(&acm->spare_read_urbs)) {
451 spin_unlock_irqrestore(&acm->read_lock, flags);
454 rcv = list_entry(acm->spare_read_urbs.next,
455 struct acm_ru, list);
456 list_del(&rcv->list);
457 spin_unlock_irqrestore(&acm->read_lock, flags);
459 buf = list_entry(acm->spare_read_bufs.next,
460 struct acm_rb, list);
461 list_del(&buf->list);
466 usb_fill_int_urb(rcv->urb, acm->dev,
470 acm_read_bulk, rcv, acm->bInterval);
472 usb_fill_bulk_urb(rcv->urb, acm->dev,
477 rcv->urb->transfer_dma = buf->dma;
478 rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
480 /* This shouldn't kill the driver as unsuccessful URBs are
481 returned to the free-urbs-pool and resubmited ASAP */
482 spin_lock_irqsave(&acm->read_lock, flags);
483 if (acm->susp_count ||
484 usb_submit_urb(rcv->urb, GFP_ATOMIC) < 0) {
485 list_add(&buf->list, &acm->spare_read_bufs);
486 list_add(&rcv->list, &acm->spare_read_urbs);
488 spin_unlock_irqrestore(&acm->read_lock, flags);
491 spin_unlock_irqrestore(&acm->read_lock, flags);
492 dbg("acm_rx_tasklet: sending urb 0x%p, rcv 0x%p, buf 0x%p", rcv->urb, rcv, buf);
495 spin_lock_irqsave(&acm->read_lock, flags);
497 spin_unlock_irqrestore(&acm->read_lock, flags);
500 /* data interface wrote those outgoing bytes */
501 static void acm_write_bulk(struct urb *urb)
503 struct acm_wb *wb = urb->context;
504 struct acm *acm = wb->instance;
507 if (verbose || urb->status
508 || (urb->actual_length != urb->transfer_buffer_length))
509 dev_dbg(&acm->data->dev, "tx %d/%d bytes -- > %d\n",
511 urb->transfer_buffer_length,
514 spin_lock_irqsave(&acm->write_lock, flags);
515 acm_write_done(acm, wb);
516 spin_unlock_irqrestore(&acm->write_lock, flags);
518 schedule_work(&acm->work);
520 wake_up_interruptible(&acm->drain_wait);
523 static void acm_softint(struct work_struct *work)
525 struct acm *acm = container_of(work, struct acm, work);
526 struct tty_struct *tty;
528 dev_vdbg(&acm->data->dev, "tx work\n");
531 tty = tty_port_tty_get(&acm->port);
536 static void acm_waker(struct work_struct *waker)
538 struct acm *acm = container_of(waker, struct acm, waker);
541 rv = usb_autopm_get_interface(acm->control);
543 dev_err(&acm->dev->dev, "Autopm failure in %s\n", __func__);
546 if (acm->delayed_wb) {
547 acm_start_wb(acm, acm->delayed_wb);
548 acm->delayed_wb = NULL;
550 usb_autopm_put_interface(acm->control);
557 static int acm_tty_open(struct tty_struct *tty, struct file *filp)
562 dbg("Entering acm_tty_open.");
564 mutex_lock(&open_mutex);
566 acm = acm_table[tty->index];
567 if (!acm || !acm->dev)
572 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
574 tty->driver_data = acm;
575 tty_port_tty_set(&acm->port, tty);
577 if (usb_autopm_get_interface(acm->control) < 0)
580 acm->control->needs_remote_wakeup = 1;
582 mutex_lock(&acm->mutex);
583 if (acm->port.count++) {
584 usb_autopm_put_interface(acm->control);
588 acm->ctrlurb->dev = acm->dev;
589 if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) {
590 dbg("usb_submit_urb(ctrl irq) failed");
594 if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) &&
595 (acm->ctrl_caps & USB_CDC_CAP_LINE))
598 usb_autopm_put_interface(acm->control);
600 INIT_LIST_HEAD(&acm->spare_read_urbs);
601 INIT_LIST_HEAD(&acm->spare_read_bufs);
602 INIT_LIST_HEAD(&acm->filled_read_bufs);
604 for (i = 0; i < acm->rx_buflimit; i++)
605 list_add(&(acm->ru[i].list), &acm->spare_read_urbs);
606 for (i = 0; i < acm->rx_buflimit; i++)
607 list_add(&(acm->rb[i].list), &acm->spare_read_bufs);
611 tasklet_schedule(&acm->urb_task);
612 rv = tty_port_block_til_ready(&acm->port, tty, filp);
614 mutex_unlock(&acm->mutex);
616 mutex_unlock(&open_mutex);
620 usb_kill_urb(acm->ctrlurb);
622 usb_autopm_put_interface(acm->control);
624 mutex_unlock(&acm->mutex);
626 mutex_unlock(&open_mutex);
627 tty_port_tty_set(&acm->port, NULL);
631 static void acm_tty_unregister(struct acm *acm)
635 nr = acm->rx_buflimit;
636 tty_unregister_device(acm_tty_driver, acm->minor);
637 usb_put_intf(acm->control);
638 acm_table[acm->minor] = NULL;
639 usb_free_urb(acm->ctrlurb);
640 for (i = 0; i < ACM_NW; i++)
641 usb_free_urb(acm->wb[i].urb);
642 for (i = 0; i < nr; i++)
643 usb_free_urb(acm->ru[i].urb);
644 kfree(acm->country_codes);
648 static int acm_tty_chars_in_buffer(struct tty_struct *tty);
650 static void acm_port_down(struct acm *acm, int drain)
652 int i, nr = acm->rx_buflimit;
653 mutex_lock(&open_mutex);
655 usb_autopm_get_interface(acm->control);
656 acm_set_control(acm, acm->ctrlout = 0);
657 /* try letting the last writes drain naturally */
659 wait_event_interruptible_timeout(acm->drain_wait,
660 (ACM_NW == acm_wb_is_avail(acm)) || !acm->dev,
661 ACM_CLOSE_TIMEOUT * HZ);
663 usb_kill_urb(acm->ctrlurb);
664 for (i = 0; i < ACM_NW; i++)
665 usb_kill_urb(acm->wb[i].urb);
666 for (i = 0; i < nr; i++)
667 usb_kill_urb(acm->ru[i].urb);
668 acm->control->needs_remote_wakeup = 0;
669 usb_autopm_put_interface(acm->control);
671 mutex_unlock(&open_mutex);
674 static void acm_tty_hangup(struct tty_struct *tty)
676 struct acm *acm = tty->driver_data;
677 tty_port_hangup(&acm->port);
678 acm_port_down(acm, 0);
681 static void acm_tty_close(struct tty_struct *tty, struct file *filp)
683 struct acm *acm = tty->driver_data;
685 /* Perform the closing process and see if we need to do the hardware
687 if (!acm || tty_port_close_start(&acm->port, tty, filp) == 0)
689 acm_port_down(acm, 0);
690 tty_port_close_end(&acm->port, tty);
691 mutex_lock(&open_mutex);
692 tty_port_tty_set(&acm->port, NULL);
694 acm_tty_unregister(acm);
695 mutex_unlock(&open_mutex);
698 static int acm_tty_write(struct tty_struct *tty,
699 const unsigned char *buf, int count)
701 struct acm *acm = tty->driver_data;
707 dbg("Entering acm_tty_write to write %d bytes,", count);
714 spin_lock_irqsave(&acm->write_lock, flags);
715 wbn = acm_wb_alloc(acm);
717 spin_unlock_irqrestore(&acm->write_lock, flags);
722 count = (count > acm->writesize) ? acm->writesize : count;
723 dbg("Get %d bytes...", count);
724 memcpy(wb->buf, buf, count);
726 spin_unlock_irqrestore(&acm->write_lock, flags);
728 stat = acm_write_start(acm, wbn);
734 static int acm_tty_write_room(struct tty_struct *tty)
736 struct acm *acm = tty->driver_data;
740 * Do not let the line discipline to know that we have a reserve,
741 * or it might get too enthusiastic.
743 return acm_wb_is_avail(acm) ? acm->writesize : 0;
746 static int acm_tty_chars_in_buffer(struct tty_struct *tty)
748 struct acm *acm = tty->driver_data;
752 * This is inaccurate (overcounts), but it works.
754 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
757 static void acm_tty_throttle(struct tty_struct *tty)
759 struct acm *acm = tty->driver_data;
762 spin_lock_bh(&acm->throttle_lock);
764 spin_unlock_bh(&acm->throttle_lock);
767 static void acm_tty_unthrottle(struct tty_struct *tty)
769 struct acm *acm = tty->driver_data;
772 spin_lock_bh(&acm->throttle_lock);
774 spin_unlock_bh(&acm->throttle_lock);
775 tasklet_schedule(&acm->urb_task);
778 static int acm_tty_break_ctl(struct tty_struct *tty, int state)
780 struct acm *acm = tty->driver_data;
784 retval = acm_send_break(acm, state ? 0xffff : 0);
786 dbg("send break failed");
790 static int acm_tty_tiocmget(struct tty_struct *tty, struct file *file)
792 struct acm *acm = tty->driver_data;
797 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
798 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
799 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
800 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
801 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
805 static int acm_tty_tiocmset(struct tty_struct *tty, struct file *file,
806 unsigned int set, unsigned int clear)
808 struct acm *acm = tty->driver_data;
809 unsigned int newctrl;
814 newctrl = acm->ctrlout;
815 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
816 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
817 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
818 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
820 newctrl = (newctrl & ~clear) | set;
822 if (acm->ctrlout == newctrl)
824 return acm_set_control(acm, acm->ctrlout = newctrl);
827 static int acm_tty_ioctl(struct tty_struct *tty, struct file *file,
828 unsigned int cmd, unsigned long arg)
830 struct acm *acm = tty->driver_data;
838 static const __u32 acm_tty_speed[] = {
839 0, 50, 75, 110, 134, 150, 200, 300, 600,
840 1200, 1800, 2400, 4800, 9600, 19200, 38400,
841 57600, 115200, 230400, 460800, 500000, 576000,
842 921600, 1000000, 1152000, 1500000, 2000000,
843 2500000, 3000000, 3500000, 4000000
846 static const __u8 acm_tty_size[] = {
850 static void acm_tty_set_termios(struct tty_struct *tty,
851 struct ktermios *termios_old)
853 struct acm *acm = tty->driver_data;
854 struct ktermios *termios = tty->termios;
855 struct usb_cdc_line_coding newline;
856 int newctrl = acm->ctrlout;
861 /* FIXME: Needs to support the tty_baud interface */
862 /* FIXME: Broken on sparc */
863 newline.dwDTERate = cpu_to_le32p(acm_tty_speed +
864 (termios->c_cflag & CBAUD & ~CBAUDEX) + (termios->c_cflag & CBAUDEX ? 15 : 0));
865 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
866 newline.bParityType = termios->c_cflag & PARENB ?
867 (termios->c_cflag & PARODD ? 1 : 2) +
868 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
869 newline.bDataBits = acm_tty_size[(termios->c_cflag & CSIZE) >> 4];
870 /* FIXME: Needs to clear unsupported bits in the termios */
871 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
873 if (!newline.dwDTERate) {
874 newline.dwDTERate = acm->line.dwDTERate;
875 newctrl &= ~ACM_CTRL_DTR;
877 newctrl |= ACM_CTRL_DTR;
879 if (newctrl != acm->ctrlout)
880 acm_set_control(acm, acm->ctrlout = newctrl);
882 if (memcmp(&acm->line, &newline, sizeof newline)) {
883 memcpy(&acm->line, &newline, sizeof newline);
884 dbg("set line: %d %d %d %d", le32_to_cpu(newline.dwDTERate),
885 newline.bCharFormat, newline.bParityType,
887 acm_set_line(acm, &acm->line);
892 * USB probe and disconnect routines.
895 /* Little helpers: write/read buffers free */
896 static void acm_write_buffers_free(struct acm *acm)
900 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
902 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
903 usb_buffer_free(usb_dev, acm->writesize, wb->buf, wb->dmah);
906 static void acm_read_buffers_free(struct acm *acm)
908 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
909 int i, n = acm->rx_buflimit;
911 for (i = 0; i < n; i++)
912 usb_buffer_free(usb_dev, acm->readsize,
913 acm->rb[i].base, acm->rb[i].dma);
916 /* Little helper: write buffers allocate */
917 static int acm_write_buffers_alloc(struct acm *acm)
922 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
923 wb->buf = usb_buffer_alloc(acm->dev, acm->writesize, GFP_KERNEL,
929 usb_buffer_free(acm->dev, acm->writesize,
938 static int acm_probe(struct usb_interface *intf,
939 const struct usb_device_id *id)
941 struct usb_cdc_union_desc *union_header = NULL;
942 struct usb_cdc_country_functional_desc *cfd = NULL;
943 unsigned char *buffer = intf->altsetting->extra;
944 int buflen = intf->altsetting->extralen;
945 struct usb_interface *control_interface;
946 struct usb_interface *data_interface;
947 struct usb_endpoint_descriptor *epctrl = NULL;
948 struct usb_endpoint_descriptor *epread = NULL;
949 struct usb_endpoint_descriptor *epwrite = NULL;
950 struct usb_device *usb_dev = interface_to_usbdev(intf);
953 int ctrlsize, readsize;
955 u8 ac_management_function = 0;
956 u8 call_management_function = 0;
957 int call_interface_num = -1;
958 int data_interface_num;
959 unsigned long quirks;
962 int combined_interfaces = 0;
965 quirks = (unsigned long)id->driver_info;
966 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
968 /* handle quirks deadly to normal probing*/
969 if (quirks == NO_UNION_NORMAL) {
970 data_interface = usb_ifnum_to_if(usb_dev, 1);
971 control_interface = usb_ifnum_to_if(usb_dev, 0);
972 goto skip_normal_probe;
977 dev_err(&intf->dev, "Weird descriptor references\n");
982 if (intf->cur_altsetting->endpoint->extralen &&
983 intf->cur_altsetting->endpoint->extra) {
985 "Seeking extra descriptors on endpoint\n");
986 buflen = intf->cur_altsetting->endpoint->extralen;
987 buffer = intf->cur_altsetting->endpoint->extra;
990 "Zero length descriptor references\n");
996 if (buffer[1] != USB_DT_CS_INTERFACE) {
997 dev_err(&intf->dev, "skipping garbage\n");
1001 switch (buffer[2]) {
1002 case USB_CDC_UNION_TYPE: /* we've found it */
1004 dev_err(&intf->dev, "More than one "
1005 "union descriptor, skipping ...\n");
1008 union_header = (struct usb_cdc_union_desc *)buffer;
1010 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1011 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1013 case USB_CDC_HEADER_TYPE: /* maybe check version */
1014 break; /* for now we ignore it */
1015 case USB_CDC_ACM_TYPE:
1016 ac_management_function = buffer[3];
1018 case USB_CDC_CALL_MANAGEMENT_TYPE:
1019 call_management_function = buffer[3];
1020 call_interface_num = buffer[4];
1021 if ((call_management_function & 3) != 3)
1022 dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
1025 /* there are LOTS more CDC descriptors that
1026 * could legitimately be found here.
1028 dev_dbg(&intf->dev, "Ignoring descriptor: "
1029 "type %02x, length %d\n",
1030 buffer[2], buffer[0]);
1034 buflen -= buffer[0];
1035 buffer += buffer[0];
1038 if (!union_header) {
1039 if (call_interface_num > 0) {
1040 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1041 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1042 control_interface = intf;
1044 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1045 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1048 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1049 combined_interfaces = 1;
1050 control_interface = data_interface = intf;
1051 goto look_for_collapsed_interface;
1055 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1056 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1057 if (!control_interface || !data_interface) {
1058 dev_dbg(&intf->dev, "no interfaces\n");
1063 if (data_interface_num != call_interface_num)
1064 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1066 if (control_interface == data_interface) {
1067 /* some broken devices designed for windows work this way */
1068 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1069 combined_interfaces = 1;
1070 /* a popular other OS doesn't use it */
1071 quirks |= NO_CAP_LINE;
1072 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1073 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1076 look_for_collapsed_interface:
1077 for (i = 0; i < 3; i++) {
1078 struct usb_endpoint_descriptor *ep;
1079 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1081 if (usb_endpoint_is_int_in(ep))
1083 else if (usb_endpoint_is_bulk_out(ep))
1085 else if (usb_endpoint_is_bulk_in(ep))
1090 if (!epctrl || !epread || !epwrite)
1093 goto made_compressed_probe;
1098 /*workaround for switched interfaces */
1099 if (data_interface->cur_altsetting->desc.bInterfaceClass
1100 != CDC_DATA_INTERFACE_TYPE) {
1101 if (control_interface->cur_altsetting->desc.bInterfaceClass
1102 == CDC_DATA_INTERFACE_TYPE) {
1103 struct usb_interface *t;
1105 "Your device has switched interfaces.\n");
1106 t = control_interface;
1107 control_interface = data_interface;
1114 /* Accept probe requests only for the control interface */
1115 if (!combined_interfaces && intf != control_interface)
1118 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1119 /* valid in this context */
1120 dev_dbg(&intf->dev, "The data interface isn't available\n");
1125 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2)
1128 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1129 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1130 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1133 /* workaround for switched endpoints */
1134 if (!usb_endpoint_dir_in(epread)) {
1135 /* descriptors are swapped */
1136 struct usb_endpoint_descriptor *t;
1138 "The data interface has switched endpoints\n");
1143 made_compressed_probe:
1144 dbg("interfaces are valid");
1145 for (minor = 0; minor < ACM_TTY_MINORS && acm_table[minor]; minor++);
1147 if (minor == ACM_TTY_MINORS) {
1148 dev_err(&intf->dev, "no more free acm devices\n");
1152 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1154 dev_dbg(&intf->dev, "out of memory (acm kzalloc)\n");
1158 ctrlsize = le16_to_cpu(epctrl->wMaxPacketSize);
1159 readsize = le16_to_cpu(epread->wMaxPacketSize) *
1160 (quirks == SINGLE_RX_URB ? 1 : 2);
1161 acm->combined_interfaces = combined_interfaces;
1162 acm->writesize = le16_to_cpu(epwrite->wMaxPacketSize) * 20;
1163 acm->control = control_interface;
1164 acm->data = data_interface;
1167 acm->ctrl_caps = ac_management_function;
1168 if (quirks & NO_CAP_LINE)
1169 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1170 acm->ctrlsize = ctrlsize;
1171 acm->readsize = readsize;
1172 acm->rx_buflimit = num_rx_buf;
1173 acm->urb_task.func = acm_rx_tasklet;
1174 acm->urb_task.data = (unsigned long) acm;
1175 INIT_WORK(&acm->work, acm_softint);
1176 INIT_WORK(&acm->waker, acm_waker);
1177 init_waitqueue_head(&acm->drain_wait);
1178 spin_lock_init(&acm->throttle_lock);
1179 spin_lock_init(&acm->write_lock);
1180 spin_lock_init(&acm->read_lock);
1181 mutex_init(&acm->mutex);
1182 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1183 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1185 acm->bInterval = epread->bInterval;
1186 tty_port_init(&acm->port);
1187 acm->port.ops = &acm_port_ops;
1189 buf = usb_buffer_alloc(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1191 dev_dbg(&intf->dev, "out of memory (ctrl buffer alloc)\n");
1194 acm->ctrl_buffer = buf;
1196 if (acm_write_buffers_alloc(acm) < 0) {
1197 dev_dbg(&intf->dev, "out of memory (write buffer alloc)\n");
1201 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1202 if (!acm->ctrlurb) {
1203 dev_dbg(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
1206 for (i = 0; i < num_rx_buf; i++) {
1207 struct acm_ru *rcv = &(acm->ru[i]);
1209 rcv->urb = usb_alloc_urb(0, GFP_KERNEL);
1210 if (rcv->urb == NULL) {
1212 "out of memory (read urbs usb_alloc_urb)\n");
1216 rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1217 rcv->instance = acm;
1219 for (i = 0; i < num_rx_buf; i++) {
1220 struct acm_rb *rb = &(acm->rb[i]);
1222 rb->base = usb_buffer_alloc(acm->dev, readsize,
1223 GFP_KERNEL, &rb->dma);
1226 "out of memory (read bufs usb_buffer_alloc)\n");
1230 for (i = 0; i < ACM_NW; i++) {
1231 struct acm_wb *snd = &(acm->wb[i]);
1233 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1234 if (snd->urb == NULL) {
1236 "out of memory (write urbs usb_alloc_urb)");
1240 if (usb_endpoint_xfer_int(epwrite))
1241 usb_fill_int_urb(snd->urb, usb_dev,
1242 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1243 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1245 usb_fill_bulk_urb(snd->urb, usb_dev,
1246 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1247 NULL, acm->writesize, acm_write_bulk, snd);
1248 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1249 snd->instance = acm;
1252 usb_set_intfdata(intf, acm);
1254 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1258 if (cfd) { /* export the country data */
1259 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1260 if (!acm->country_codes)
1261 goto skip_countries;
1262 acm->country_code_size = cfd->bLength - 4;
1263 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1265 acm->country_rel_date = cfd->iCountryCodeRelDate;
1267 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1269 kfree(acm->country_codes);
1270 goto skip_countries;
1273 i = device_create_file(&intf->dev,
1274 &dev_attr_iCountryCodeRelDate);
1276 kfree(acm->country_codes);
1277 goto skip_countries;
1282 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1283 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1284 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1285 /* works around buggy devices */
1286 epctrl->bInterval ? epctrl->bInterval : 0xff);
1287 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1288 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1290 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1292 acm_set_control(acm, acm->ctrlout);
1294 acm->line.dwDTERate = cpu_to_le32(9600);
1295 acm->line.bDataBits = 8;
1296 acm_set_line(acm, &acm->line);
1298 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1299 usb_set_intfdata(data_interface, acm);
1301 usb_get_intf(control_interface);
1302 tty_register_device(acm_tty_driver, minor, &control_interface->dev);
1304 acm_table[minor] = acm;
1308 for (i = 0; i < ACM_NW; i++)
1309 usb_free_urb(acm->wb[i].urb);
1311 acm_read_buffers_free(acm);
1312 for (i = 0; i < num_rx_buf; i++)
1313 usb_free_urb(acm->ru[i].urb);
1314 usb_free_urb(acm->ctrlurb);
1316 acm_write_buffers_free(acm);
1318 usb_buffer_free(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1325 static void stop_data_traffic(struct acm *acm)
1328 dbg("Entering stop_data_traffic");
1330 tasklet_disable(&acm->urb_task);
1332 usb_kill_urb(acm->ctrlurb);
1333 for (i = 0; i < ACM_NW; i++)
1334 usb_kill_urb(acm->wb[i].urb);
1335 for (i = 0; i < acm->rx_buflimit; i++)
1336 usb_kill_urb(acm->ru[i].urb);
1338 tasklet_enable(&acm->urb_task);
1340 cancel_work_sync(&acm->work);
1341 cancel_work_sync(&acm->waker);
1344 static void acm_disconnect(struct usb_interface *intf)
1346 struct acm *acm = usb_get_intfdata(intf);
1347 struct usb_device *usb_dev = interface_to_usbdev(intf);
1348 struct tty_struct *tty;
1350 /* sibling interface is already cleaning up */
1354 mutex_lock(&open_mutex);
1355 if (acm->country_codes) {
1356 device_remove_file(&acm->control->dev,
1357 &dev_attr_wCountryCodes);
1358 device_remove_file(&acm->control->dev,
1359 &dev_attr_iCountryCodeRelDate);
1361 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1363 usb_set_intfdata(acm->control, NULL);
1364 usb_set_intfdata(acm->data, NULL);
1366 stop_data_traffic(acm);
1368 acm_write_buffers_free(acm);
1369 usb_buffer_free(usb_dev, acm->ctrlsize, acm->ctrl_buffer,
1371 acm_read_buffers_free(acm);
1373 if (!acm->combined_interfaces)
1374 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1375 acm->data : acm->control);
1377 if (acm->port.count == 0) {
1378 acm_tty_unregister(acm);
1379 mutex_unlock(&open_mutex);
1383 mutex_unlock(&open_mutex);
1384 tty = tty_port_tty_get(&acm->port);
1392 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1394 struct acm *acm = usb_get_intfdata(intf);
1397 if (message.event & PM_EVENT_AUTO) {
1400 spin_lock_irq(&acm->read_lock);
1401 spin_lock(&acm->write_lock);
1402 b = acm->processing + acm->transmitting;
1403 spin_unlock(&acm->write_lock);
1404 spin_unlock_irq(&acm->read_lock);
1409 spin_lock_irq(&acm->read_lock);
1410 spin_lock(&acm->write_lock);
1411 cnt = acm->susp_count++;
1412 spin_unlock(&acm->write_lock);
1413 spin_unlock_irq(&acm->read_lock);
1418 we treat opened interfaces differently,
1419 we must guard against open
1421 mutex_lock(&acm->mutex);
1423 if (acm->port.count)
1424 stop_data_traffic(acm);
1426 mutex_unlock(&acm->mutex);
1430 static int acm_resume(struct usb_interface *intf)
1432 struct acm *acm = usb_get_intfdata(intf);
1436 spin_lock_irq(&acm->read_lock);
1437 acm->susp_count -= 1;
1438 cnt = acm->susp_count;
1439 spin_unlock_irq(&acm->read_lock);
1444 mutex_lock(&acm->mutex);
1445 if (acm->port.count) {
1446 rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO);
1450 tasklet_schedule(&acm->urb_task);
1454 mutex_unlock(&acm->mutex);
1458 #endif /* CONFIG_PM */
1460 * USB driver structure.
1463 static struct usb_device_id acm_ids[] = {
1464 /* quirky and broken devices */
1465 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1466 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1468 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1469 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1471 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1472 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1474 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1475 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1477 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1478 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1480 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1481 .driver_info = SINGLE_RX_URB,
1483 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1484 .driver_info = SINGLE_RX_URB, /* firmware bug */
1486 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1487 .driver_info = SINGLE_RX_URB, /* firmware bug */
1489 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1490 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1492 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1493 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1495 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1496 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1498 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1499 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1501 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1502 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1504 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1506 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1507 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1508 data interface instead of
1509 communications interface.
1510 Maybe we should define a new
1513 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1514 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1517 /* control interfaces with various AT-command sets */
1518 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1519 USB_CDC_ACM_PROTO_AT_V25TER) },
1520 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1521 USB_CDC_ACM_PROTO_AT_PCCA101) },
1522 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1523 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1524 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1525 USB_CDC_ACM_PROTO_AT_GSM) },
1526 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1527 USB_CDC_ACM_PROTO_AT_3G) },
1528 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1529 USB_CDC_ACM_PROTO_AT_CDMA) },
1531 /* NOTE: COMM/ACM/0xff is likely MSFT RNDIS ... NOT a modem!! */
1535 MODULE_DEVICE_TABLE(usb, acm_ids);
1537 static struct usb_driver acm_driver = {
1540 .disconnect = acm_disconnect,
1542 .suspend = acm_suspend,
1543 .resume = acm_resume,
1545 .id_table = acm_ids,
1547 .supports_autosuspend = 1,
1552 * TTY driver structures.
1555 static const struct tty_operations acm_ops = {
1556 .open = acm_tty_open,
1557 .close = acm_tty_close,
1558 .hangup = acm_tty_hangup,
1559 .write = acm_tty_write,
1560 .write_room = acm_tty_write_room,
1561 .ioctl = acm_tty_ioctl,
1562 .throttle = acm_tty_throttle,
1563 .unthrottle = acm_tty_unthrottle,
1564 .chars_in_buffer = acm_tty_chars_in_buffer,
1565 .break_ctl = acm_tty_break_ctl,
1566 .set_termios = acm_tty_set_termios,
1567 .tiocmget = acm_tty_tiocmget,
1568 .tiocmset = acm_tty_tiocmset,
1575 static int __init acm_init(void)
1578 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1579 if (!acm_tty_driver)
1581 acm_tty_driver->owner = THIS_MODULE,
1582 acm_tty_driver->driver_name = "acm",
1583 acm_tty_driver->name = "ttyACM",
1584 acm_tty_driver->major = ACM_TTY_MAJOR,
1585 acm_tty_driver->minor_start = 0,
1586 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1587 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1588 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1589 acm_tty_driver->init_termios = tty_std_termios;
1590 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1592 tty_set_operations(acm_tty_driver, &acm_ops);
1594 retval = tty_register_driver(acm_tty_driver);
1596 put_tty_driver(acm_tty_driver);
1600 retval = usb_register(&acm_driver);
1602 tty_unregister_driver(acm_tty_driver);
1603 put_tty_driver(acm_tty_driver);
1607 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1613 static void __exit acm_exit(void)
1615 usb_deregister(&acm_driver);
1616 tty_unregister_driver(acm_tty_driver);
1617 put_tty_driver(acm_tty_driver);
1620 module_init(acm_init);
1621 module_exit(acm_exit);
1623 MODULE_AUTHOR(DRIVER_AUTHOR);
1624 MODULE_DESCRIPTION(DRIVER_DESC);
1625 MODULE_LICENSE("GPL");
1626 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);