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;
1097 acm->trans9 = (format_size == UART_FORMAT_SIZE_9);
1099 if (cflag & PARENB) {
1100 if (cflag & PARODD) {
1101 if (cflag & CMSPAR) {
1102 format_parity = UART_FORMAT_PARITY_1;
1104 format_parity = UART_FORMAT_PARITY_ODD;
1107 if (cflag & CMSPAR) {
1108 format_parity = UART_FORMAT_PARITY_0;
1110 format_parity = UART_FORMAT_PARITY_EVEN;
1114 format_parity = UART_FORMAT_PARITY_NONE;
1117 if (cflag & CSTOPB) {
1118 format_stop = UART_FORMAT_STOP_2;
1120 format_stop = UART_FORMAT_STOP_1;
1124 if (format_size == UART_FORMAT_SIZE_8) {
1125 acm->iwa = format_parity;
1126 if (portdata->iwa != UART_FORMAT_PARITY_NONE) {
1127 format_size = UART_FORMAT_SIZE_9;
1128 format_parity = UART_FORMAT_PARITY_NONE;
1131 acm->iwa = UART_FORMAT_PARITY_NONE;
1134 vizzini_set_reg(acm, block, UART_FORMAT, format_size | format_parity | format_stop);
1136 if (cflag & CRTSCTS) {
1137 flow = UART_FLOW_MODE_HW;
1138 gpio_mode = UART_GPIO_MODE_SEL_RTS_CTS;
1139 } else if (I_IXOFF(tty) || I_IXON(tty)) {
1140 unsigned char start_char = START_CHAR(tty);
1141 unsigned char stop_char = STOP_CHAR(tty);
1143 flow = UART_FLOW_MODE_SW;
1144 gpio_mode = UART_GPIO_MODE_SEL_GPIO;
1146 vizzini_set_reg(acm, block, UART_XON_CHAR, start_char);
1147 vizzini_set_reg(acm, block, UART_XOFF_CHAR, stop_char);
1149 flow = UART_FLOW_MODE_NONE;
1150 gpio_mode = UART_GPIO_MODE_SEL_GPIO;
1153 vizzini_set_reg(acm, block, UART_FLOW, flow);
1154 vizzini_set_reg(acm, block, UART_GPIO_MODE, gpio_mode);
1157 /* Turn on wide mode if we're 9-bit transparent. */
1158 vizzini_set_reg(acm, EPLOCALS_REG_BLOCK, (block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE, 1);
1160 } else if (acm->iwa != UART_FORMAT_PARITY_NONE) {
1161 vizzini_set_reg(acm, EPLOCALS_REG_BLOCK, (block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE, 1);
1163 } else if (!acm->preciseflags) {
1164 /* Turn off wide mode unless we have precise flags. */
1165 vizzini_set_reg(acm, EPLOCALS_REG_BLOCK, (block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE, 0);
1168 rate = cpu_to_le32(tty_get_baud_rate(tty));
1170 vizzini_set_baud_rate(acm, rate);
1172 acm->line.dwDTERate = rate;
1173 acm->line.bCharFormat = format_stop;
1174 acm->line.bParityType = format_parity;
1175 acm->line.bDataBits = format_size;
1177 vizzini_enable(acm);
1180 static const struct tty_port_operations acm_port_ops = {
1181 .dtr_rts = acm_port_dtr_rts,
1182 .shutdown = acm_port_shutdown,
1183 .activate = acm_port_activate,
1184 .destruct = acm_port_destruct,
1188 * USB probe and disconnect routines.
1191 /* Little helpers: write/read buffers free */
1192 static void acm_write_buffers_free(struct acm *acm)
1196 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1198 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1199 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
1202 static void acm_read_buffers_free(struct acm *acm)
1204 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1207 for (i = 0; i < acm->rx_buflimit; i++)
1208 usb_free_coherent(usb_dev, acm->readsize,
1209 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1212 /* Little helper: write buffers allocate */
1213 static int acm_write_buffers_alloc(struct acm *acm)
1218 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1219 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1225 usb_free_coherent(acm->dev, acm->writesize,
1234 static int acm_probe(struct usb_interface *intf,
1235 const struct usb_device_id *id)
1237 struct usb_cdc_union_desc *union_header = NULL;
1238 struct usb_cdc_country_functional_desc *cfd = NULL;
1239 unsigned char *buffer = intf->altsetting->extra;
1240 int buflen = intf->altsetting->extralen;
1241 struct usb_interface *control_interface;
1242 struct usb_interface *data_interface;
1243 struct usb_endpoint_descriptor *epctrl = NULL;
1244 struct usb_endpoint_descriptor *epread = NULL;
1245 struct usb_endpoint_descriptor *epwrite = NULL;
1246 struct usb_device *usb_dev = interface_to_usbdev(intf);
1249 int ctrlsize, readsize;
1251 u8 ac_management_function = 0;
1252 u8 call_management_function = 0;
1253 int call_interface_num = -1;
1254 int data_interface_num = -1;
1255 unsigned long quirks;
1258 unsigned int elength = 0;
1259 int combined_interfaces = 0;
1260 struct device *tty_dev;
1264 quirks = (unsigned long)id->driver_info;
1266 if (quirks == IGNORE_DEVICE)
1269 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1271 /* handle quirks deadly to normal probing*/
1272 if (quirks == NO_UNION_NORMAL) {
1273 data_interface = usb_ifnum_to_if(usb_dev, 1);
1274 control_interface = usb_ifnum_to_if(usb_dev, 0);
1275 goto skip_normal_probe;
1280 dev_err(&intf->dev, "Weird descriptor references\n");
1285 if (intf->cur_altsetting->endpoint &&
1286 intf->cur_altsetting->endpoint->extralen &&
1287 intf->cur_altsetting->endpoint->extra) {
1289 "Seeking extra descriptors on endpoint\n");
1290 buflen = intf->cur_altsetting->endpoint->extralen;
1291 buffer = intf->cur_altsetting->endpoint->extra;
1294 "Zero length descriptor references\n");
1299 while (buflen > 0) {
1300 elength = buffer[0];
1302 dev_err(&intf->dev, "skipping garbage byte\n");
1306 if (buffer[1] != USB_DT_CS_INTERFACE) {
1307 dev_err(&intf->dev, "skipping garbage\n");
1311 switch (buffer[2]) {
1312 case USB_CDC_UNION_TYPE: /* we've found it */
1313 if (elength < sizeof(struct usb_cdc_union_desc))
1316 dev_err(&intf->dev, "More than one "
1317 "union descriptor, skipping ...\n");
1320 union_header = (struct usb_cdc_union_desc *)buffer;
1322 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1323 if (elength < sizeof(struct usb_cdc_country_functional_desc))
1325 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1327 case USB_CDC_HEADER_TYPE: /* maybe check version */
1328 break; /* for now we ignore it */
1329 case USB_CDC_ACM_TYPE:
1332 ac_management_function = buffer[3];
1334 case USB_CDC_CALL_MANAGEMENT_TYPE:
1337 call_management_function = buffer[3];
1338 call_interface_num = buffer[4];
1342 * there are LOTS more CDC descriptors that
1343 * could legitimately be found here.
1345 dev_dbg(&intf->dev, "Ignoring descriptor: "
1346 "type %02x, length %ud\n",
1347 buffer[2], elength);
1355 if (!union_header) {
1356 if (call_interface_num > 0) {
1357 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1358 /* quirks for Droids MuIn LCD */
1359 if (quirks & NO_DATA_INTERFACE)
1360 data_interface = usb_ifnum_to_if(usb_dev, 0);
1362 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1363 control_interface = intf;
1365 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1366 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1369 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1370 combined_interfaces = 1;
1371 control_interface = data_interface = intf;
1372 goto look_for_collapsed_interface;
1376 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1377 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1380 if (!control_interface || !data_interface) {
1381 dev_dbg(&intf->dev, "no interfaces\n");
1385 if (data_interface_num != call_interface_num)
1386 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1388 if (control_interface == data_interface) {
1389 /* some broken devices designed for windows work this way */
1390 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1391 combined_interfaces = 1;
1392 /* a popular other OS doesn't use it */
1393 quirks |= NO_CAP_LINE;
1394 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1395 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1398 look_for_collapsed_interface:
1399 for (i = 0; i < 3; i++) {
1400 struct usb_endpoint_descriptor *ep;
1401 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1403 if (usb_endpoint_is_int_in(ep))
1405 else if (usb_endpoint_is_bulk_out(ep))
1407 else if (usb_endpoint_is_bulk_in(ep))
1412 if (!epctrl || !epread || !epwrite)
1415 goto made_compressed_probe;
1420 /*workaround for switched interfaces */
1421 if (data_interface->cur_altsetting->desc.bInterfaceClass
1422 != CDC_DATA_INTERFACE_TYPE) {
1423 if (control_interface->cur_altsetting->desc.bInterfaceClass
1424 == CDC_DATA_INTERFACE_TYPE) {
1426 "Your device has switched interfaces.\n");
1427 swap(control_interface, data_interface);
1433 /* Accept probe requests only for the control interface */
1434 if (!combined_interfaces && intf != control_interface)
1437 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1438 /* valid in this context */
1439 dev_dbg(&intf->dev, "The data interface isn't available\n");
1444 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1445 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1448 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1449 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1450 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1453 /* workaround for switched endpoints */
1454 if (!usb_endpoint_dir_in(epread)) {
1455 /* descriptors are swapped */
1457 "The data interface has switched endpoints\n");
1458 swap(epread, epwrite);
1460 made_compressed_probe:
1461 dev_dbg(&intf->dev, "interfaces are valid\n");
1463 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1467 minor = acm_alloc_minor(acm);
1469 dev_err(&intf->dev, "no more free acm devices\n");
1474 ctrlsize = usb_endpoint_maxp(epctrl);
1475 readsize = usb_endpoint_maxp(epread) *
1476 (quirks == SINGLE_RX_URB ? 1 : 2);
1477 acm->combined_interfaces = combined_interfaces;
1478 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1479 acm->control = control_interface;
1480 acm->data = data_interface;
1483 acm->ctrl_caps = ac_management_function;
1484 if (quirks & NO_CAP_LINE)
1485 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1486 acm->ctrlsize = ctrlsize;
1487 acm->readsize = readsize;
1488 acm->rx_buflimit = num_rx_buf;
1489 INIT_WORK(&acm->work, acm_softint);
1490 init_waitqueue_head(&acm->wioctl);
1491 spin_lock_init(&acm->write_lock);
1492 spin_lock_init(&acm->read_lock);
1493 mutex_init(&acm->mutex);
1494 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1495 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1497 acm->bInterval = epread->bInterval;
1498 tty_port_init(&acm->port);
1499 acm->port.ops = &acm_port_ops;
1500 init_usb_anchor(&acm->delayed);
1501 acm->quirks = quirks;
1503 acm->block = epwrite->bEndpointAddress - 1;
1505 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1508 acm->ctrl_buffer = buf;
1510 if (acm_write_buffers_alloc(acm) < 0)
1513 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1517 for (i = 0; i < num_rx_buf; i++) {
1518 struct acm_rb *rb = &(acm->read_buffers[i]);
1521 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1528 urb = usb_alloc_urb(0, GFP_KERNEL);
1532 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1533 urb->transfer_dma = rb->dma;
1534 if (acm->is_int_ep) {
1535 usb_fill_int_urb(urb, acm->dev,
1539 acm_read_bulk_callback, rb,
1542 usb_fill_bulk_urb(urb, acm->dev,
1546 acm_read_bulk_callback, rb);
1549 acm->read_urbs[i] = urb;
1550 __set_bit(i, &acm->read_urbs_free);
1552 for (i = 0; i < ACM_NW; i++) {
1553 struct acm_wb *snd = &(acm->wb[i]);
1555 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1556 if (snd->urb == NULL)
1559 if (usb_endpoint_xfer_int(epwrite))
1560 usb_fill_int_urb(snd->urb, usb_dev,
1561 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
1562 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1564 usb_fill_bulk_urb(snd->urb, usb_dev,
1565 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1566 NULL, acm->writesize, acm_write_bulk, snd);
1567 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1568 snd->instance = acm;
1571 usb_set_intfdata(intf, acm);
1573 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1577 if (cfd) { /* export the country data */
1578 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1579 if (!acm->country_codes)
1580 goto skip_countries;
1581 acm->country_code_size = cfd->bLength - 4;
1582 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1584 acm->country_rel_date = cfd->iCountryCodeRelDate;
1586 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1588 kfree(acm->country_codes);
1589 acm->country_codes = NULL;
1590 acm->country_code_size = 0;
1591 goto skip_countries;
1594 i = device_create_file(&intf->dev,
1595 &dev_attr_iCountryCodeRelDate);
1597 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1598 kfree(acm->country_codes);
1599 acm->country_codes = NULL;
1600 acm->country_code_size = 0;
1601 goto skip_countries;
1606 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1607 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1608 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1609 /* works around buggy devices */
1610 epctrl->bInterval ? epctrl->bInterval : 16);
1611 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1612 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1614 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1616 acm->line.dwDTERate = cpu_to_le32(9600);
1617 acm->line.bDataBits = 8;
1618 acm_set_line(acm, &acm->line);
1620 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1621 usb_set_intfdata(data_interface, acm);
1623 usb_get_intf(control_interface);
1624 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1625 &control_interface->dev);
1626 if (IS_ERR(tty_dev)) {
1627 rv = PTR_ERR(tty_dev);
1631 if (quirks & CLEAR_HALT_CONDITIONS) {
1632 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress));
1633 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress));
1638 if (acm->country_codes) {
1639 device_remove_file(&acm->control->dev,
1640 &dev_attr_wCountryCodes);
1641 device_remove_file(&acm->control->dev,
1642 &dev_attr_iCountryCodeRelDate);
1643 kfree(acm->country_codes);
1645 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1647 usb_set_intfdata(intf, NULL);
1648 for (i = 0; i < ACM_NW; i++)
1649 usb_free_urb(acm->wb[i].urb);
1651 for (i = 0; i < num_rx_buf; i++)
1652 usb_free_urb(acm->read_urbs[i]);
1653 acm_read_buffers_free(acm);
1654 usb_free_urb(acm->ctrlurb);
1656 acm_write_buffers_free(acm);
1658 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1660 acm_release_minor(acm);
1666 static void stop_data_traffic(struct acm *acm)
1670 dev_dbg(&acm->control->dev, "%s\n", __func__);
1672 usb_kill_urb(acm->ctrlurb);
1673 for (i = 0; i < ACM_NW; i++)
1674 usb_kill_urb(acm->wb[i].urb);
1675 for (i = 0; i < acm->rx_buflimit; i++)
1676 usb_kill_urb(acm->read_urbs[i]);
1678 cancel_work_sync(&acm->work);
1681 static void acm_disconnect(struct usb_interface *intf)
1683 struct acm *acm = usb_get_intfdata(intf);
1684 struct usb_device *usb_dev = interface_to_usbdev(intf);
1685 struct tty_struct *tty;
1688 dev_dbg(&intf->dev, "%s\n", __func__);
1690 /* sibling interface is already cleaning up */
1694 mutex_lock(&acm->mutex);
1695 acm->disconnected = true;
1696 if (acm->country_codes) {
1697 device_remove_file(&acm->control->dev,
1698 &dev_attr_wCountryCodes);
1699 device_remove_file(&acm->control->dev,
1700 &dev_attr_iCountryCodeRelDate);
1702 wake_up_all(&acm->wioctl);
1703 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1704 usb_set_intfdata(acm->control, NULL);
1705 usb_set_intfdata(acm->data, NULL);
1706 mutex_unlock(&acm->mutex);
1708 tty = tty_port_tty_get(&acm->port);
1714 stop_data_traffic(acm);
1716 tty_unregister_device(acm_tty_driver, acm->minor);
1718 usb_free_urb(acm->ctrlurb);
1719 for (i = 0; i < ACM_NW; i++)
1720 usb_free_urb(acm->wb[i].urb);
1721 for (i = 0; i < acm->rx_buflimit; i++)
1722 usb_free_urb(acm->read_urbs[i]);
1723 acm_write_buffers_free(acm);
1724 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1725 acm_read_buffers_free(acm);
1727 if (!acm->combined_interfaces)
1728 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1729 acm->data : acm->control);
1731 tty_port_put(&acm->port);
1735 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1737 struct acm *acm = usb_get_intfdata(intf);
1740 spin_lock_irq(&acm->write_lock);
1741 if (PMSG_IS_AUTO(message)) {
1742 if (acm->transmitting) {
1743 spin_unlock_irq(&acm->write_lock);
1747 cnt = acm->susp_count++;
1748 spin_unlock_irq(&acm->write_lock);
1753 stop_data_traffic(acm);
1758 static int acm_resume(struct usb_interface *intf)
1760 struct acm *acm = usb_get_intfdata(intf);
1764 spin_lock_irq(&acm->write_lock);
1766 if (--acm->susp_count)
1769 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
1770 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1773 urb = usb_get_from_anchor(&acm->delayed);
1777 acm_start_wb(acm, urb->context);
1781 * delayed error checking because we must
1782 * do the write path at all cost
1787 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1790 spin_unlock_irq(&acm->write_lock);
1795 static int acm_reset_resume(struct usb_interface *intf)
1797 struct acm *acm = usb_get_intfdata(intf);
1799 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1800 tty_port_tty_hangup(&acm->port, false);
1802 return acm_resume(intf);
1805 #endif /* CONFIG_PM */
1808 * USB driver structure.
1811 static const struct usb_device_id xrusb_ids[] = {
1812 { USB_DEVICE(0x04e2, 0x1410), },
1813 { USB_DEVICE(0x04e2, 0x1412), },
1814 { USB_DEVICE(0x04e2, 0x1414), },
1818 MODULE_DEVICE_TABLE(usb, xrusb_ids);
1820 static struct usb_driver acm_driver = {
1823 .disconnect = acm_disconnect,
1825 .suspend = acm_suspend,
1826 .resume = acm_resume,
1827 .reset_resume = acm_reset_resume,
1829 .id_table = xrusb_ids,
1831 .supports_autosuspend = 1,
1833 .disable_hub_initiated_lpm = 1,
1837 * TTY driver structures.
1840 static const struct tty_operations acm_ops = {
1841 .install = acm_tty_install,
1842 .open = acm_tty_open,
1843 .close = acm_tty_close,
1844 .cleanup = acm_tty_cleanup,
1845 .hangup = acm_tty_hangup,
1846 .write = acm_tty_write,
1847 .write_room = acm_tty_write_room,
1848 .ioctl = acm_tty_ioctl,
1849 .throttle = acm_tty_throttle,
1850 .unthrottle = acm_tty_unthrottle,
1851 .chars_in_buffer = acm_tty_chars_in_buffer,
1852 .break_ctl = acm_tty_break_ctl,
1853 .set_termios = acm_tty_set_termios,
1854 .tiocmget = acm_tty_tiocmget,
1855 .tiocmset = acm_tty_tiocmset,
1862 static int __init acm_init(void)
1865 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1866 if (!acm_tty_driver)
1868 acm_tty_driver->driver_name = "vizzini",
1869 acm_tty_driver->name = "ttyVIZ",
1870 acm_tty_driver->major = 0, // Dynamically allocate the major number
1871 acm_tty_driver->minor_start = 0,
1872 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1873 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1874 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1875 acm_tty_driver->init_termios = tty_std_termios;
1876 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1878 tty_set_operations(acm_tty_driver, &acm_ops);
1880 retval = tty_register_driver(acm_tty_driver);
1882 put_tty_driver(acm_tty_driver);
1886 retval = usb_register(&acm_driver);
1888 tty_unregister_driver(acm_tty_driver);
1889 put_tty_driver(acm_tty_driver);
1893 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1898 static void __exit acm_exit(void)
1900 usb_deregister(&acm_driver);
1901 tty_unregister_driver(acm_tty_driver);
1902 put_tty_driver(acm_tty_driver);
1903 idr_destroy(&acm_minors);
1906 module_init(acm_init);
1907 module_exit(acm_exit);
1909 MODULE_AUTHOR(DRIVER_AUTHOR);
1910 MODULE_DESCRIPTION(DRIVER_DESC);
1911 MODULE_LICENSE("GPL");
1912 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);