4 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de>
5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.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>
10 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com>
11 * Copyright (c) 2013 Exar Corporation, Inc.
15 * v1.0- Support for Kernel 3.5 and newer,
16 * based on cdc-acm.c sample of 3.6 kernel.
21 * This program is free software; you can redistribute it and/or modify
22 * it under the terms of the GNU General Public License as published by
23 * the Free Software Foundation; either version 2 of the License, or
24 * (at your option) any later version.
26 * This program is distributed in the hope that it will be useful,
27 * but WITHOUT ANY WARRANTY; without even the implied warranty of
28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 * GNU General Public License for more details.
31 * You should have received a copy of the GNU General Public License
32 * along with this program; if not, write to the Free Software
33 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
39 #include <linux/kernel.h>
40 #include <linux/errno.h>
41 #include <linux/init.h>
42 #include <linux/slab.h>
43 #include <linux/tty.h>
44 #include <linux/serial.h>
45 #include <linux/tty_driver.h>
46 #include <linux/tty_flip.h>
47 #include <linux/module.h>
48 #include <linux/mutex.h>
49 #include <linux/uaccess.h>
50 #include <linux/usb.h>
51 #include <linux/usb/cdc.h>
52 #include <asm/byteorder.h>
53 #include <asm/unaligned.h>
54 #include <linux/idr.h>
55 #include <linux/list.h>
59 #define DRIVER_AUTHOR "Ravi Reddy"
60 #define DRIVER_DESC "Exar USB UART Driver for XR21V141x "
62 static struct usb_driver acm_driver;
63 static struct tty_driver *acm_tty_driver;
65 static DEFINE_IDR(acm_minors);
66 static DEFINE_MUTEX(acm_minors_lock);
68 static void acm_tty_set_termios(struct tty_struct *tty,
69 struct ktermios *termios_old);
72 * acm_minors accessors
76 * Look up an ACM structure by minor. If found and not disconnected, increment
77 * its refcount and return it with its mutex held.
79 static struct acm *acm_get_by_minor(unsigned int minor)
83 mutex_lock(&acm_minors_lock);
84 acm = idr_find(&acm_minors, minor);
86 mutex_lock(&acm->mutex);
87 if (acm->disconnected) {
88 mutex_unlock(&acm->mutex);
91 tty_port_get(&acm->port);
92 mutex_unlock(&acm->mutex);
95 mutex_unlock(&acm_minors_lock);
100 * Try to find an available minor number and if found, associate it with 'acm'.
102 static int acm_alloc_minor(struct acm *acm)
106 mutex_lock(&acm_minors_lock);
107 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL);
108 mutex_unlock(&acm_minors_lock);
113 /* Release the minor number associated with 'acm'. */
114 static void acm_release_minor(struct acm *acm)
116 mutex_lock(&acm_minors_lock);
117 idr_remove(&acm_minors, acm->minor);
118 mutex_unlock(&acm_minors_lock);
122 * Functions for ACM control messages.
125 static int acm_ctrl_msg(struct acm *acm, int request, int value,
130 retval = usb_autopm_get_interface(acm->control);
134 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
135 request, USB_RT_ACM, value,
136 acm->control->altsetting[0].desc.bInterfaceNumber,
139 dev_dbg(&acm->control->dev,
140 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
141 __func__, request, value, len, retval);
143 usb_autopm_put_interface(acm->control);
145 return retval < 0 ? retval : 0;
148 /* devices aren't required to support these requests.
149 * the cdc acm descriptor tells whether they do...
151 static inline int acm_set_control(struct acm *acm, int control)
153 if (acm->quirks & QUIRK_CONTROL_LINE_STATE)
156 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE,
160 #define acm_set_line(acm, line) \
161 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
162 #define acm_send_break(acm, ms) \
163 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
166 * Write buffer management.
167 * All of these assume proper locks taken by the caller.
170 static int acm_wb_alloc(struct acm *acm)
183 wbn = (wbn + 1) % ACM_NW;
189 static int acm_wb_is_avail(struct acm *acm)
195 spin_lock_irqsave(&acm->write_lock, flags);
196 for (i = 0; i < ACM_NW; i++)
198 spin_unlock_irqrestore(&acm->write_lock, flags);
203 * Finish write. Caller must hold acm->write_lock
205 static void acm_write_done(struct acm *acm, struct acm_wb *wb)
209 usb_autopm_put_interface_async(acm->control);
215 * the caller is responsible for locking
218 static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
224 wb->urb->transfer_buffer = wb->buf;
225 wb->urb->transfer_dma = wb->dmah;
226 wb->urb->transfer_buffer_length = wb->len;
227 wb->urb->dev = acm->dev;
229 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
231 dev_err(&acm->data->dev,
232 "%s - usb_submit_urb(write bulk) failed: %d\n",
234 acm_write_done(acm, wb);
240 * attributes exported through sysfs
242 static ssize_t show_caps
243 (struct device *dev, struct device_attribute *attr, char *buf)
245 struct usb_interface *intf = to_usb_interface(dev);
246 struct acm *acm = usb_get_intfdata(intf);
248 return sprintf(buf, "%d", acm->ctrl_caps);
250 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
252 static ssize_t show_country_codes
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 memcpy(buf, acm->country_codes, acm->country_code_size);
259 return acm->country_code_size;
262 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
264 static ssize_t show_country_rel_date
265 (struct device *dev, struct device_attribute *attr, char *buf)
267 struct usb_interface *intf = to_usb_interface(dev);
268 struct acm *acm = usb_get_intfdata(intf);
270 return sprintf(buf, "%d", acm->country_rel_date);
273 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
275 * Interrupt handlers for various ACM device responses
278 /* control interface reports status changes with "interrupt" transfers */
279 static void acm_ctrl_irq(struct urb *urb)
281 struct acm *acm = urb->context;
282 struct usb_cdc_notification *dr = urb->transfer_buffer;
287 int status = urb->status;
296 /* this urb is terminated, clean up */
297 dev_dbg(&acm->control->dev,
298 "%s - urb shutting down with status: %d\n",
302 dev_dbg(&acm->control->dev,
303 "%s - nonzero urb status received: %d\n",
308 usb_mark_last_busy(acm->dev);
310 data = (unsigned char *)(dr + 1);
311 switch (dr->bNotificationType) {
312 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
313 dev_dbg(&acm->control->dev, "%s - network connection: %d\n",
314 __func__, dr->wValue);
317 case USB_CDC_NOTIFY_SERIAL_STATE:
318 newctrl = get_unaligned_le16(data);
320 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
321 dev_dbg(&acm->control->dev, "%s - calling hangup\n",
323 tty_port_tty_hangup(&acm->port, false);
326 difference = acm->ctrlin ^ newctrl;
327 spin_lock(&acm->read_lock);
328 acm->ctrlin = newctrl;
329 acm->oldcount = acm->iocount;
331 if (difference & ACM_CTRL_DSR)
333 if (difference & ACM_CTRL_BRK)
335 if (difference & ACM_CTRL_RI)
337 if (difference & ACM_CTRL_DCD)
339 if (difference & ACM_CTRL_FRAMING)
340 acm->iocount.frame++;
341 if (difference & ACM_CTRL_PARITY)
342 acm->iocount.parity++;
343 if (difference & ACM_CTRL_OVERRUN)
344 acm->iocount.overrun++;
345 spin_unlock(&acm->read_lock);
348 wake_up_all(&acm->wioctl);
353 dev_dbg(&acm->control->dev,
354 "%s - unknown notification %d received: index %d "
355 "len %d data0 %d data1 %d\n",
357 dr->bNotificationType, dr->wIndex,
358 dr->wLength, data[0], data[1]);
362 retval = usb_submit_urb(urb, GFP_ATOMIC);
363 if (retval && retval != -EPERM)
364 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n",
368 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
372 if (!test_and_clear_bit(index, &acm->read_urbs_free))
375 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index);
377 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
380 dev_err(&acm->data->dev,
381 "%s - usb_submit_urb failed: %d\n",
384 set_bit(index, &acm->read_urbs_free);
391 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
396 for (i = 0; i < acm->rx_buflimit; ++i) {
397 res = acm_submit_read_urb(acm, i, mem_flags);
405 static void acm_process_read_urb(struct acm *acm, struct urb *urb)
407 if (!urb->actual_length)
410 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
412 tty_flip_buffer_push(&acm->port);
415 static void acm_read_bulk_callback(struct urb *urb)
417 struct acm_rb *rb = urb->context;
418 struct acm *acm = rb->instance;
420 int status = urb->status;
422 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__,
423 rb->index, urb->actual_length);
426 set_bit(rb->index, &acm->read_urbs_free);
427 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
432 set_bit(rb->index, &acm->read_urbs_free);
433 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n",
438 usb_mark_last_busy(acm->dev);
440 acm_process_read_urb(acm, urb);
442 * Unthrottle may run on another CPU which needs to see events
443 * in the same order. Submission has an implict barrier
445 smp_mb__before_atomic();
446 set_bit(rb->index, &acm->read_urbs_free);
448 /* throttle device if requested by tty */
449 spin_lock_irqsave(&acm->read_lock, flags);
450 acm->throttled = acm->throttle_req;
451 if (!acm->throttled) {
452 spin_unlock_irqrestore(&acm->read_lock, flags);
453 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
455 spin_unlock_irqrestore(&acm->read_lock, flags);
459 /* data interface wrote those outgoing bytes */
460 static void acm_write_bulk(struct urb *urb)
462 struct acm_wb *wb = urb->context;
463 struct acm *acm = wb->instance;
465 int status = urb->status;
467 if (status || (urb->actual_length != urb->transfer_buffer_length))
468 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n",
471 urb->transfer_buffer_length,
474 spin_lock_irqsave(&acm->write_lock, flags);
475 acm_write_done(acm, wb);
476 spin_unlock_irqrestore(&acm->write_lock, flags);
477 schedule_work(&acm->work);
480 static void acm_softint(struct work_struct *work)
482 struct acm *acm = container_of(work, struct acm, work);
484 dev_vdbg(&acm->data->dev, "%s\n", __func__);
486 tty_port_tty_wakeup(&acm->port);
493 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
498 dev_dbg(tty->dev, "%s\n", __func__);
500 acm = acm_get_by_minor(tty->index);
504 retval = tty_standard_install(driver, tty);
506 goto error_init_termios;
508 tty->driver_data = acm;
513 tty_port_put(&acm->port);
517 static int acm_tty_open(struct tty_struct *tty, struct file *filp)
519 struct acm *acm = tty->driver_data;
521 dev_dbg(tty->dev, "%s\n", __func__);
523 return tty_port_open(&acm->port, tty, filp);
526 static void acm_port_dtr_rts(struct tty_port *port, int raise)
528 struct acm *acm = container_of(port, struct acm, port);
533 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
537 /* FIXME: add missing ctrlout locking throughout driver */
540 res = acm_set_control(acm, val);
541 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
542 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
545 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
547 struct acm *acm = container_of(port, struct acm, port);
548 int retval = -ENODEV;
551 dev_dbg(&acm->control->dev, "%s\n", __func__);
553 mutex_lock(&acm->mutex);
554 if (acm->disconnected)
557 retval = usb_autopm_get_interface(acm->control);
559 goto error_get_interface;
562 * FIXME: Why do we need this? Allocating 64K of physically contiguous
563 * memory is really nasty...
565 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
566 acm->control->needs_remote_wakeup = 1;
568 acm->ctrlurb->dev = acm->dev;
569 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
571 dev_err(&acm->control->dev,
572 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
573 goto error_submit_urb;
576 acm_tty_set_termios(tty, NULL);
579 * Unthrottle device in case the TTY was closed while throttled.
581 spin_lock_irq(&acm->read_lock);
583 acm->throttle_req = 0;
584 spin_unlock_irq(&acm->read_lock);
586 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
588 goto error_submit_read_urbs;
590 usb_autopm_put_interface(acm->control);
592 mutex_unlock(&acm->mutex);
596 error_submit_read_urbs:
597 for (i = 0; i < acm->rx_buflimit; i++)
598 usb_kill_urb(acm->read_urbs[i]);
599 usb_kill_urb(acm->ctrlurb);
601 usb_autopm_put_interface(acm->control);
604 mutex_unlock(&acm->mutex);
606 return usb_translate_errors(retval);
609 static void acm_port_destruct(struct tty_port *port)
611 struct acm *acm = container_of(port, struct acm, port);
613 dev_dbg(&acm->control->dev, "%s\n", __func__);
615 acm_release_minor(acm);
616 usb_put_intf(acm->control);
617 kfree(acm->country_codes);
621 static void acm_port_shutdown(struct tty_port *port)
623 struct acm *acm = container_of(port, struct acm, port);
628 dev_dbg(&acm->control->dev, "%s\n", __func__);
631 * Need to grab write_lock to prevent race with resume, but no need to
632 * hold it due to the tty-port initialised flag.
634 spin_lock_irq(&acm->write_lock);
635 spin_unlock_irq(&acm->write_lock);
637 usb_autopm_get_interface_no_resume(acm->control);
638 acm->control->needs_remote_wakeup = 0;
639 usb_autopm_put_interface(acm->control);
642 urb = usb_get_from_anchor(&acm->delayed);
647 usb_autopm_put_interface_async(acm->control);
650 usb_kill_urb(acm->ctrlurb);
651 for (i = 0; i < ACM_NW; i++)
652 usb_kill_urb(acm->wb[i].urb);
653 for (i = 0; i < acm->rx_buflimit; i++)
654 usb_kill_urb(acm->read_urbs[i]);
657 static void acm_tty_cleanup(struct tty_struct *tty)
659 struct acm *acm = tty->driver_data;
660 dev_dbg(&acm->control->dev, "%s\n", __func__);
661 tty_port_put(&acm->port);
664 static void acm_tty_hangup(struct tty_struct *tty)
666 struct acm *acm = tty->driver_data;
667 dev_dbg(&acm->control->dev, "%s\n", __func__);
668 tty_port_hangup(&acm->port);
671 static void acm_tty_close(struct tty_struct *tty, struct file *filp)
673 struct acm *acm = tty->driver_data;
674 dev_dbg(&acm->control->dev, "%s\n", __func__);
675 tty_port_close(&acm->port, tty, filp);
678 static int acm_tty_write(struct tty_struct *tty,
679 const unsigned char *buf, int count)
681 struct acm *acm = tty->driver_data;
690 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
692 spin_lock_irqsave(&acm->write_lock, flags);
693 wbn = acm_wb_alloc(acm);
695 spin_unlock_irqrestore(&acm->write_lock, flags);
702 spin_unlock_irqrestore(&acm->write_lock, flags);
706 count = (count > acm->writesize) ? acm->writesize : count;
707 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
708 memcpy(wb->buf, buf, count);
711 stat = usb_autopm_get_interface_async(acm->control);
714 spin_unlock_irqrestore(&acm->write_lock, flags);
718 if (acm->susp_count) {
719 usb_anchor_urb(wb->urb, &acm->delayed);
720 spin_unlock_irqrestore(&acm->write_lock, flags);
724 stat = acm_start_wb(acm, wb);
725 spin_unlock_irqrestore(&acm->write_lock, flags);
732 static int acm_tty_write_room(struct tty_struct *tty)
734 struct acm *acm = tty->driver_data;
736 * Do not let the line discipline to know that we have a reserve,
737 * or it might get too enthusiastic.
739 return acm_wb_is_avail(acm) ? acm->writesize : 0;
742 static int acm_tty_chars_in_buffer(struct tty_struct *tty)
744 struct acm *acm = tty->driver_data;
746 * if the device was unplugged then any remaining characters fell out
747 * of the connector ;)
749 if (acm->disconnected)
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;
761 spin_lock_irq(&acm->read_lock);
762 acm->throttle_req = 1;
763 spin_unlock_irq(&acm->read_lock);
766 static void acm_tty_unthrottle(struct tty_struct *tty)
768 struct acm *acm = tty->driver_data;
769 unsigned int was_throttled;
771 spin_lock_irq(&acm->read_lock);
772 was_throttled = acm->throttled;
774 acm->throttle_req = 0;
775 spin_unlock_irq(&acm->read_lock);
778 acm_submit_read_urbs(acm, GFP_KERNEL);
781 static int acm_tty_break_ctl(struct tty_struct *tty, int state)
783 struct acm *acm = tty->driver_data;
786 retval = acm_send_break(acm, state ? 0xffff : 0);
788 dev_dbg(&acm->control->dev, "%s - send break failed\n",
793 static int acm_tty_tiocmget(struct tty_struct *tty)
795 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,
806 unsigned int set, unsigned int clear)
808 struct acm *acm = tty->driver_data;
809 unsigned int newctrl;
811 newctrl = acm->ctrlout;
812 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
813 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
814 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
815 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
817 newctrl = (newctrl & ~clear) | set;
819 if (acm->ctrlout == newctrl)
821 return acm_set_control(acm, acm->ctrlout = newctrl);
824 static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
826 struct serial_struct tmp;
831 memset(&tmp, 0, sizeof(tmp));
832 tmp.flags = ASYNC_LOW_LATENCY;
833 tmp.xmit_fifo_size = acm->writesize;
834 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
835 tmp.close_delay = acm->port.close_delay / 10;
836 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
837 ASYNC_CLOSING_WAIT_NONE :
838 acm->port.closing_wait / 10;
840 if (copy_to_user(info, &tmp, sizeof(tmp)))
846 static int set_serial_info(struct acm *acm,
847 struct serial_struct __user *newinfo)
849 struct serial_struct new_serial;
850 unsigned int closing_wait, close_delay;
853 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
856 close_delay = new_serial.close_delay * 10;
857 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
858 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
860 mutex_lock(&acm->port.mutex);
862 if (!capable(CAP_SYS_ADMIN)) {
863 if ((close_delay != acm->port.close_delay) ||
864 (closing_wait != acm->port.closing_wait))
867 retval = -EOPNOTSUPP;
869 acm->port.close_delay = close_delay;
870 acm->port.closing_wait = closing_wait;
873 mutex_unlock(&acm->port.mutex);
877 static int wait_serial_change(struct acm *acm, unsigned long arg)
880 DECLARE_WAITQUEUE(wait, current);
881 struct async_icount old, new;
883 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD ))
886 spin_lock_irq(&acm->read_lock);
890 spin_unlock_irq(&acm->read_lock);
892 if ((arg & TIOCM_DSR) &&
895 if ((arg & TIOCM_CD) &&
898 if ((arg & TIOCM_RI) &&
902 add_wait_queue(&acm->wioctl, &wait);
903 set_current_state(TASK_INTERRUPTIBLE);
905 remove_wait_queue(&acm->wioctl, &wait);
906 if (acm->disconnected) {
912 if (signal_pending(current))
922 static int get_serial_usage(struct acm *acm,
923 struct serial_icounter_struct __user *count)
925 struct serial_icounter_struct icount;
928 memset(&icount, 0, sizeof(icount));
929 icount.dsr = acm->iocount.dsr;
930 icount.rng = acm->iocount.rng;
931 icount.dcd = acm->iocount.dcd;
932 icount.frame = acm->iocount.frame;
933 icount.overrun = acm->iocount.overrun;
934 icount.parity = acm->iocount.parity;
935 icount.brk = acm->iocount.brk;
937 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
943 static int vizzini_set_reg(struct acm *acm,
944 int block, int regnum, int value)
948 dev_dbg(&acm->control->dev, "%s 0x%02x:0x%02x = 0x%02x\n", __func__, block, regnum, value);
950 result = usb_control_msg(acm->dev, /* usb device */
951 usb_sndctrlpipe(acm->dev, 0), /* endpoint pipe */
952 XR_SET_REG, /* request */
953 USB_DIR_OUT | USB_TYPE_VENDOR, /* request_type */
954 value, /* request value */
955 regnum | (block << 8), /* index */
962 static void vizzini_disable(struct acm *acm)
964 int block = acm->block;
966 vizzini_set_reg(acm, block, UART_ENABLE, 0);
967 vizzini_set_reg(acm, URM_REG_BLOCK, URM_ENABLE_BASE + block, 0);
970 static void vizzini_enable(struct acm *acm)
972 int block = acm->block;
974 vizzini_set_reg(acm, URM_REG_BLOCK, URM_ENABLE_BASE + block, URM_ENABLE_0_TX);
975 vizzini_set_reg(acm, block, UART_ENABLE, UART_ENABLE_TX | UART_ENABLE_RX);
976 vizzini_set_reg(acm, URM_REG_BLOCK, URM_ENABLE_BASE + block, URM_ENABLE_0_TX | URM_ENABLE_0_RX);
979 static int acm_tty_ioctl(struct tty_struct *tty,
980 unsigned int cmd, unsigned long arg)
982 struct acm *acm = tty->driver_data;
983 int rv = -ENOIOCTLCMD;
986 case TIOCGSERIAL: /* gets serial port data */
987 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
990 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
993 rv = usb_autopm_get_interface(acm->control);
998 rv = wait_serial_change(acm, arg);
999 usb_autopm_put_interface(acm->control);
1002 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
1009 struct vizzini_baud_rate
1016 static struct vizzini_baud_rate vizzini_baud_rates[] = {
1017 { 0x000, 0x000, 0x000 },
1018 { 0x000, 0x000, 0x000 },
1019 { 0x100, 0x000, 0x100 },
1020 { 0x020, 0x400, 0x020 },
1021 { 0x010, 0x100, 0x010 },
1022 { 0x208, 0x040, 0x208 },
1023 { 0x104, 0x820, 0x108 },
1024 { 0x844, 0x210, 0x884 },
1025 { 0x444, 0x110, 0x444 },
1026 { 0x122, 0x888, 0x224 },
1027 { 0x912, 0x448, 0x924 },
1028 { 0x492, 0x248, 0x492 },
1029 { 0x252, 0x928, 0x292 },
1030 { 0X94A, 0X4A4, 0XA52 },
1031 { 0X52A, 0XAA4, 0X54A },
1032 { 0XAAA, 0x954, 0X4AA },
1033 { 0XAAA, 0x554, 0XAAA },
1034 { 0x555, 0XAD4, 0X5AA },
1035 { 0XB55, 0XAB4, 0X55A },
1036 { 0X6B5, 0X5AC, 0XB56 },
1037 { 0X5B5, 0XD6C, 0X6D6 },
1038 { 0XB6D, 0XB6A, 0XDB6 },
1039 { 0X76D, 0X6DA, 0XBB6 },
1040 { 0XEDD, 0XDDA, 0X76E },
1041 { 0XDDD, 0XBBA, 0XEEE },
1042 { 0X7BB, 0XF7A, 0XDDE },
1043 { 0XF7B, 0XEF6, 0X7DE },
1044 { 0XDF7, 0XBF6, 0XF7E },
1045 { 0X7F7, 0XFEE, 0XEFE },
1046 { 0XFDF, 0XFBE, 0X7FE },
1047 { 0XF7F, 0XEFE, 0XFFE },
1048 { 0XFFF, 0XFFE, 0XFFD },
1051 static int vizzini_set_baud_rate(struct acm *acm, unsigned int rate)
1053 int block = acm->block;
1054 unsigned int divisor = 48000000 / rate;
1055 unsigned int i = ((32 * 48000000) / rate) & 0x1f;
1056 unsigned int tx_mask = vizzini_baud_rates[i].tx;
1057 unsigned int rx_mask = (divisor & 1) ? vizzini_baud_rates[i].rx1 : vizzini_baud_rates[i].rx0;
1059 dev_dbg(&acm->control->dev, "Setting baud rate to %d: i=%u div=%u tx=%03x rx=%03x\n", rate, i, divisor, tx_mask, rx_mask);
1061 vizzini_set_reg(acm, block, UART_CLOCK_DIVISOR_0, (divisor >> 0) & 0xff);
1062 vizzini_set_reg(acm, block, UART_CLOCK_DIVISOR_1, (divisor >> 8) & 0xff);
1063 vizzini_set_reg(acm, block, UART_CLOCK_DIVISOR_2, (divisor >> 16) & 0xff);
1064 vizzini_set_reg(acm, block, UART_TX_CLOCK_MASK_0, (tx_mask >> 0) & 0xff);
1065 vizzini_set_reg(acm, block, UART_TX_CLOCK_MASK_1, (tx_mask >> 8) & 0xff);
1066 vizzini_set_reg(acm, block, UART_RX_CLOCK_MASK_0, (rx_mask >> 0) & 0xff);
1067 vizzini_set_reg(acm, block, UART_RX_CLOCK_MASK_1, (rx_mask >> 8) & 0xff);
1073 static void acm_tty_set_termios(struct tty_struct *tty,
1074 struct ktermios *termios_old)
1076 struct acm *acm = tty->driver_data;
1077 unsigned int cflag, block;
1079 unsigned int format_size, format_parity, format_stop, flow, gpio_mode;
1081 cflag = tty->termios.c_cflag;
1083 acm->clocal = ((cflag & CLOCAL) != 0);
1087 vizzini_disable(acm);
1089 if ((cflag & CSIZE) == CS7) {
1090 format_size = UART_FORMAT_SIZE_7;
1091 } else if ((cflag & CSIZE) == CS5) {
1092 /* Enabling 5-bit mode is really 9-bit mode! */
1093 format_size = UART_FORMAT_SIZE_9;
1095 format_size = UART_FORMAT_SIZE_8;
1098 if (cflag & PARENB) {
1099 if (cflag & PARODD) {
1100 if (cflag & CMSPAR) {
1101 format_parity = UART_FORMAT_PARITY_1;
1103 format_parity = UART_FORMAT_PARITY_ODD;
1106 if (cflag & CMSPAR) {
1107 format_parity = UART_FORMAT_PARITY_0;
1109 format_parity = UART_FORMAT_PARITY_EVEN;
1113 format_parity = UART_FORMAT_PARITY_NONE;
1116 if (cflag & CSTOPB) {
1117 format_stop = UART_FORMAT_STOP_2;
1119 format_stop = UART_FORMAT_STOP_1;
1122 vizzini_set_reg(acm, block, UART_FORMAT, format_size | format_parity | format_stop);
1124 if (cflag & CRTSCTS) {
1125 flow = UART_FLOW_MODE_HW;
1126 gpio_mode = UART_GPIO_MODE_SEL_RTS_CTS;
1127 } else if (I_IXOFF(tty) || I_IXON(tty)) {
1128 unsigned char start_char = START_CHAR(tty);
1129 unsigned char stop_char = STOP_CHAR(tty);
1131 flow = UART_FLOW_MODE_SW;
1132 gpio_mode = UART_GPIO_MODE_SEL_GPIO;
1134 vizzini_set_reg(acm, block, UART_XON_CHAR, start_char);
1135 vizzini_set_reg(acm, block, UART_XOFF_CHAR, stop_char);
1137 flow = UART_FLOW_MODE_NONE;
1138 gpio_mode = UART_GPIO_MODE_SEL_GPIO;
1141 vizzini_set_reg(acm, block, UART_FLOW, flow);
1142 vizzini_set_reg(acm, block, UART_GPIO_MODE, gpio_mode);
1144 vizzini_set_reg(acm, EPLOCALS_REG_BLOCK,
1145 (block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE,
1146 format_size == UART_FORMAT_SIZE_9);
1148 rate = cpu_to_le32(tty_get_baud_rate(tty));
1150 vizzini_set_baud_rate(acm, rate);
1152 acm->line.dwDTERate = rate;
1153 acm->line.bCharFormat = format_stop;
1154 acm->line.bParityType = format_parity;
1155 acm->line.bDataBits = format_size;
1157 vizzini_enable(acm);
1160 static const struct tty_port_operations acm_port_ops = {
1161 .dtr_rts = acm_port_dtr_rts,
1162 .shutdown = acm_port_shutdown,
1163 .activate = acm_port_activate,
1164 .destruct = acm_port_destruct,
1168 * USB probe and disconnect routines.
1171 /* Little helpers: write/read buffers free */
1172 static void acm_write_buffers_free(struct acm *acm)
1176 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1178 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1179 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
1182 static void acm_read_buffers_free(struct acm *acm)
1184 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1187 for (i = 0; i < acm->rx_buflimit; i++)
1188 usb_free_coherent(usb_dev, acm->readsize,
1189 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1192 /* Little helper: write buffers allocate */
1193 static int acm_write_buffers_alloc(struct acm *acm)
1198 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1199 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1205 usb_free_coherent(acm->dev, acm->writesize,
1214 static int acm_probe(struct usb_interface *intf,
1215 const struct usb_device_id *id)
1217 struct usb_cdc_union_desc *union_header = NULL;
1218 struct usb_cdc_country_functional_desc *cfd = NULL;
1219 unsigned char *buffer = intf->altsetting->extra;
1220 int buflen = intf->altsetting->extralen;
1221 struct usb_interface *control_interface;
1222 struct usb_interface *data_interface;
1223 struct usb_endpoint_descriptor *epctrl = NULL;
1224 struct usb_endpoint_descriptor *epread = NULL;
1225 struct usb_endpoint_descriptor *epwrite = NULL;
1226 struct usb_device *usb_dev = interface_to_usbdev(intf);
1229 int ctrlsize, readsize;
1231 u8 ac_management_function = 0;
1232 u8 call_management_function = 0;
1233 int call_interface_num = -1;
1234 int data_interface_num = -1;
1235 unsigned long quirks;
1238 unsigned int elength = 0;
1239 int combined_interfaces = 0;
1240 struct device *tty_dev;
1244 quirks = (unsigned long)id->driver_info;
1246 if (quirks == IGNORE_DEVICE)
1249 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1251 /* handle quirks deadly to normal probing*/
1252 if (quirks == NO_UNION_NORMAL) {
1253 data_interface = usb_ifnum_to_if(usb_dev, 1);
1254 control_interface = usb_ifnum_to_if(usb_dev, 0);
1255 goto skip_normal_probe;
1260 dev_err(&intf->dev, "Weird descriptor references\n");
1265 if (intf->cur_altsetting->endpoint &&
1266 intf->cur_altsetting->endpoint->extralen &&
1267 intf->cur_altsetting->endpoint->extra) {
1269 "Seeking extra descriptors on endpoint\n");
1270 buflen = intf->cur_altsetting->endpoint->extralen;
1271 buffer = intf->cur_altsetting->endpoint->extra;
1274 "Zero length descriptor references\n");
1279 while (buflen > 0) {
1280 elength = buffer[0];
1282 dev_err(&intf->dev, "skipping garbage byte\n");
1286 if (buffer[1] != USB_DT_CS_INTERFACE) {
1287 dev_err(&intf->dev, "skipping garbage\n");
1291 switch (buffer[2]) {
1292 case USB_CDC_UNION_TYPE: /* we've found it */
1293 if (elength < sizeof(struct usb_cdc_union_desc))
1296 dev_err(&intf->dev, "More than one "
1297 "union descriptor, skipping ...\n");
1300 union_header = (struct usb_cdc_union_desc *)buffer;
1302 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1303 if (elength < sizeof(struct usb_cdc_country_functional_desc))
1305 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1307 case USB_CDC_HEADER_TYPE: /* maybe check version */
1308 break; /* for now we ignore it */
1309 case USB_CDC_ACM_TYPE:
1312 ac_management_function = buffer[3];
1314 case USB_CDC_CALL_MANAGEMENT_TYPE:
1317 call_management_function = buffer[3];
1318 call_interface_num = buffer[4];
1322 * there are LOTS more CDC descriptors that
1323 * could legitimately be found here.
1325 dev_dbg(&intf->dev, "Ignoring descriptor: "
1326 "type %02x, length %ud\n",
1327 buffer[2], elength);
1335 if (!union_header) {
1336 if (call_interface_num > 0) {
1337 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1338 /* quirks for Droids MuIn LCD */
1339 if (quirks & NO_DATA_INTERFACE)
1340 data_interface = usb_ifnum_to_if(usb_dev, 0);
1342 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1343 control_interface = intf;
1345 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1346 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1349 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1350 combined_interfaces = 1;
1351 control_interface = data_interface = intf;
1352 goto look_for_collapsed_interface;
1356 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1357 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1360 if (!control_interface || !data_interface) {
1361 dev_dbg(&intf->dev, "no interfaces\n");
1365 if (data_interface_num != call_interface_num)
1366 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1368 if (control_interface == data_interface) {
1369 /* some broken devices designed for windows work this way */
1370 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1371 combined_interfaces = 1;
1372 /* a popular other OS doesn't use it */
1373 quirks |= NO_CAP_LINE;
1374 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1375 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1378 look_for_collapsed_interface:
1379 for (i = 0; i < 3; i++) {
1380 struct usb_endpoint_descriptor *ep;
1381 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1383 if (usb_endpoint_is_int_in(ep))
1385 else if (usb_endpoint_is_bulk_out(ep))
1387 else if (usb_endpoint_is_bulk_in(ep))
1392 if (!epctrl || !epread || !epwrite)
1395 goto made_compressed_probe;
1400 /*workaround for switched interfaces */
1401 if (data_interface->cur_altsetting->desc.bInterfaceClass
1402 != CDC_DATA_INTERFACE_TYPE) {
1403 if (control_interface->cur_altsetting->desc.bInterfaceClass
1404 == CDC_DATA_INTERFACE_TYPE) {
1406 "Your device has switched interfaces.\n");
1407 swap(control_interface, data_interface);
1413 /* Accept probe requests only for the control interface */
1414 if (!combined_interfaces && intf != control_interface)
1417 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1418 /* valid in this context */
1419 dev_dbg(&intf->dev, "The data interface isn't available\n");
1424 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1425 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1428 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1429 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1430 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1433 /* workaround for switched endpoints */
1434 if (!usb_endpoint_dir_in(epread)) {
1435 /* descriptors are swapped */
1437 "The data interface has switched endpoints\n");
1438 swap(epread, epwrite);
1440 made_compressed_probe:
1441 dev_dbg(&intf->dev, "interfaces are valid\n");
1443 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1447 minor = acm_alloc_minor(acm);
1449 dev_err(&intf->dev, "no more free acm devices\n");
1454 ctrlsize = usb_endpoint_maxp(epctrl);
1455 readsize = usb_endpoint_maxp(epread) *
1456 (quirks == SINGLE_RX_URB ? 1 : 2);
1457 acm->combined_interfaces = combined_interfaces;
1458 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1459 acm->control = control_interface;
1460 acm->data = data_interface;
1463 acm->ctrl_caps = ac_management_function;
1464 if (quirks & NO_CAP_LINE)
1465 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1466 acm->ctrlsize = ctrlsize;
1467 acm->readsize = readsize;
1468 acm->rx_buflimit = num_rx_buf;
1469 INIT_WORK(&acm->work, acm_softint);
1470 init_waitqueue_head(&acm->wioctl);
1471 spin_lock_init(&acm->write_lock);
1472 spin_lock_init(&acm->read_lock);
1473 mutex_init(&acm->mutex);
1474 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1475 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1477 acm->bInterval = epread->bInterval;
1478 tty_port_init(&acm->port);
1479 acm->port.ops = &acm_port_ops;
1480 init_usb_anchor(&acm->delayed);
1481 acm->quirks = quirks;
1483 acm->block = epwrite->bEndpointAddress - 1;
1485 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1488 acm->ctrl_buffer = buf;
1490 if (acm_write_buffers_alloc(acm) < 0)
1493 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1497 for (i = 0; i < num_rx_buf; i++) {
1498 struct acm_rb *rb = &(acm->read_buffers[i]);
1501 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1508 urb = usb_alloc_urb(0, GFP_KERNEL);
1512 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1513 urb->transfer_dma = rb->dma;
1514 if (acm->is_int_ep) {
1515 usb_fill_int_urb(urb, acm->dev,
1519 acm_read_bulk_callback, rb,
1522 usb_fill_bulk_urb(urb, acm->dev,
1526 acm_read_bulk_callback, rb);
1529 acm->read_urbs[i] = urb;
1530 __set_bit(i, &acm->read_urbs_free);
1532 for (i = 0; i < ACM_NW; i++) {
1533 struct acm_wb *snd = &(acm->wb[i]);
1535 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1536 if (snd->urb == NULL)
1539 if (usb_endpoint_xfer_int(epwrite))
1540 usb_fill_int_urb(snd->urb, usb_dev,
1541 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
1542 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1544 usb_fill_bulk_urb(snd->urb, usb_dev,
1545 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1546 NULL, acm->writesize, acm_write_bulk, snd);
1547 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1548 snd->instance = acm;
1551 usb_set_intfdata(intf, acm);
1553 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1557 if (cfd) { /* export the country data */
1558 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1559 if (!acm->country_codes)
1560 goto skip_countries;
1561 acm->country_code_size = cfd->bLength - 4;
1562 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1564 acm->country_rel_date = cfd->iCountryCodeRelDate;
1566 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1568 kfree(acm->country_codes);
1569 acm->country_codes = NULL;
1570 acm->country_code_size = 0;
1571 goto skip_countries;
1574 i = device_create_file(&intf->dev,
1575 &dev_attr_iCountryCodeRelDate);
1577 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1578 kfree(acm->country_codes);
1579 acm->country_codes = NULL;
1580 acm->country_code_size = 0;
1581 goto skip_countries;
1586 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1587 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1588 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1589 /* works around buggy devices */
1590 epctrl->bInterval ? epctrl->bInterval : 16);
1591 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1592 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1594 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1596 acm->line.dwDTERate = cpu_to_le32(9600);
1597 acm->line.bDataBits = 8;
1598 acm_set_line(acm, &acm->line);
1600 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1601 usb_set_intfdata(data_interface, acm);
1603 usb_get_intf(control_interface);
1604 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1605 &control_interface->dev);
1606 if (IS_ERR(tty_dev)) {
1607 rv = PTR_ERR(tty_dev);
1611 if (quirks & CLEAR_HALT_CONDITIONS) {
1612 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress));
1613 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress));
1618 if (acm->country_codes) {
1619 device_remove_file(&acm->control->dev,
1620 &dev_attr_wCountryCodes);
1621 device_remove_file(&acm->control->dev,
1622 &dev_attr_iCountryCodeRelDate);
1623 kfree(acm->country_codes);
1625 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1627 usb_set_intfdata(intf, NULL);
1628 for (i = 0; i < ACM_NW; i++)
1629 usb_free_urb(acm->wb[i].urb);
1631 for (i = 0; i < num_rx_buf; i++)
1632 usb_free_urb(acm->read_urbs[i]);
1633 acm_read_buffers_free(acm);
1634 usb_free_urb(acm->ctrlurb);
1636 acm_write_buffers_free(acm);
1638 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1640 acm_release_minor(acm);
1646 static void stop_data_traffic(struct acm *acm)
1650 dev_dbg(&acm->control->dev, "%s\n", __func__);
1652 usb_kill_urb(acm->ctrlurb);
1653 for (i = 0; i < ACM_NW; i++)
1654 usb_kill_urb(acm->wb[i].urb);
1655 for (i = 0; i < acm->rx_buflimit; i++)
1656 usb_kill_urb(acm->read_urbs[i]);
1658 cancel_work_sync(&acm->work);
1661 static void acm_disconnect(struct usb_interface *intf)
1663 struct acm *acm = usb_get_intfdata(intf);
1664 struct usb_device *usb_dev = interface_to_usbdev(intf);
1665 struct tty_struct *tty;
1668 dev_dbg(&intf->dev, "%s\n", __func__);
1670 /* sibling interface is already cleaning up */
1674 mutex_lock(&acm->mutex);
1675 acm->disconnected = true;
1676 if (acm->country_codes) {
1677 device_remove_file(&acm->control->dev,
1678 &dev_attr_wCountryCodes);
1679 device_remove_file(&acm->control->dev,
1680 &dev_attr_iCountryCodeRelDate);
1682 wake_up_all(&acm->wioctl);
1683 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1684 usb_set_intfdata(acm->control, NULL);
1685 usb_set_intfdata(acm->data, NULL);
1686 mutex_unlock(&acm->mutex);
1688 tty = tty_port_tty_get(&acm->port);
1694 stop_data_traffic(acm);
1696 tty_unregister_device(acm_tty_driver, acm->minor);
1698 usb_free_urb(acm->ctrlurb);
1699 for (i = 0; i < ACM_NW; i++)
1700 usb_free_urb(acm->wb[i].urb);
1701 for (i = 0; i < acm->rx_buflimit; i++)
1702 usb_free_urb(acm->read_urbs[i]);
1703 acm_write_buffers_free(acm);
1704 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1705 acm_read_buffers_free(acm);
1707 if (!acm->combined_interfaces)
1708 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1709 acm->data : acm->control);
1711 tty_port_put(&acm->port);
1715 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1717 struct acm *acm = usb_get_intfdata(intf);
1720 spin_lock_irq(&acm->write_lock);
1721 if (PMSG_IS_AUTO(message)) {
1722 if (acm->transmitting) {
1723 spin_unlock_irq(&acm->write_lock);
1727 cnt = acm->susp_count++;
1728 spin_unlock_irq(&acm->write_lock);
1733 stop_data_traffic(acm);
1738 static int acm_resume(struct usb_interface *intf)
1740 struct acm *acm = usb_get_intfdata(intf);
1744 spin_lock_irq(&acm->write_lock);
1746 if (--acm->susp_count)
1749 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
1750 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1753 urb = usb_get_from_anchor(&acm->delayed);
1757 acm_start_wb(acm, urb->context);
1761 * delayed error checking because we must
1762 * do the write path at all cost
1767 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1770 spin_unlock_irq(&acm->write_lock);
1775 static int acm_reset_resume(struct usb_interface *intf)
1777 struct acm *acm = usb_get_intfdata(intf);
1779 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1780 tty_port_tty_hangup(&acm->port, false);
1782 return acm_resume(intf);
1785 #endif /* CONFIG_PM */
1788 * USB driver structure.
1791 static const struct usb_device_id xrusb_ids[] = {
1792 { USB_DEVICE(0x04e2, 0x1410), },
1793 { USB_DEVICE(0x04e2, 0x1412), },
1794 { USB_DEVICE(0x04e2, 0x1414), },
1798 MODULE_DEVICE_TABLE(usb, xrusb_ids);
1800 static struct usb_driver acm_driver = {
1803 .disconnect = acm_disconnect,
1805 .suspend = acm_suspend,
1806 .resume = acm_resume,
1807 .reset_resume = acm_reset_resume,
1809 .id_table = xrusb_ids,
1811 .supports_autosuspend = 1,
1813 .disable_hub_initiated_lpm = 1,
1817 * TTY driver structures.
1820 static const struct tty_operations acm_ops = {
1821 .install = acm_tty_install,
1822 .open = acm_tty_open,
1823 .close = acm_tty_close,
1824 .cleanup = acm_tty_cleanup,
1825 .hangup = acm_tty_hangup,
1826 .write = acm_tty_write,
1827 .write_room = acm_tty_write_room,
1828 .ioctl = acm_tty_ioctl,
1829 .throttle = acm_tty_throttle,
1830 .unthrottle = acm_tty_unthrottle,
1831 .chars_in_buffer = acm_tty_chars_in_buffer,
1832 .break_ctl = acm_tty_break_ctl,
1833 .set_termios = acm_tty_set_termios,
1834 .tiocmget = acm_tty_tiocmget,
1835 .tiocmset = acm_tty_tiocmset,
1842 static int __init acm_init(void)
1845 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1846 if (!acm_tty_driver)
1848 acm_tty_driver->driver_name = "vizzini",
1849 acm_tty_driver->name = "ttyVIZ",
1850 acm_tty_driver->major = 0, // Dynamically allocate the major number
1851 acm_tty_driver->minor_start = 0,
1852 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1853 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1854 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1855 acm_tty_driver->init_termios = tty_std_termios;
1856 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1858 tty_set_operations(acm_tty_driver, &acm_ops);
1860 retval = tty_register_driver(acm_tty_driver);
1862 put_tty_driver(acm_tty_driver);
1866 retval = usb_register(&acm_driver);
1868 tty_unregister_driver(acm_tty_driver);
1869 put_tty_driver(acm_tty_driver);
1873 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1878 static void __exit acm_exit(void)
1880 usb_deregister(&acm_driver);
1881 tty_unregister_driver(acm_tty_driver);
1882 put_tty_driver(acm_tty_driver);
1883 idr_destroy(&acm_minors);
1886 module_init(acm_init);
1887 module_exit(acm_exit);
1889 MODULE_AUTHOR(DRIVER_AUTHOR);
1890 MODULE_DESCRIPTION(DRIVER_DESC);
1891 MODULE_LICENSE("GPL");
1892 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);