1 // SPDX-License-Identifier: GPL-2.0+
3  * cdc-acm.c
41 #include "cdc-acm.h"
71 		mutex_lock(&acm->mutex);  in acm_get_by_minor()
72 		if (acm->disconnected) {  in acm_get_by_minor()
73 			mutex_unlock(&acm->mutex);  in acm_get_by_minor()
76 			tty_port_get(&acm->port);  in acm_get_by_minor()
77 			mutex_unlock(&acm->mutex);  in acm_get_by_minor()
102 	idr_remove(&acm_minors, acm->minor);  in acm_release_minor()
115 	retval = usb_autopm_get_interface(acm->control);  in acm_ctrl_msg()
119 	retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),  in acm_ctrl_msg()
121 		acm->control->altsetting[0].desc.bInterfaceNumber,  in acm_ctrl_msg()
124 	dev_dbg(&acm->control->dev,  in acm_ctrl_msg()
125 		"%s - rq 0x%02x, val %#x, len %#x, result %d\n",  in acm_ctrl_msg()
128 	usb_autopm_put_interface(acm->control);  in acm_ctrl_msg()
138 	if (acm->quirks & QUIRK_CONTROL_LINE_STATE)  in acm_set_control()
139 		return -EOPNOTSUPP;  in acm_set_control()
147 #define acm_send_break(acm, ms) \  argument
148 	acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
154 	usb_poison_urb(acm->ctrlurb);  in acm_poison_urbs()
156 		usb_poison_urb(acm->wb[i].urb);  in acm_poison_urbs()
157 	for (i = 0; i < acm->rx_buflimit; i++)  in acm_poison_urbs()
158 		usb_poison_urb(acm->read_urbs[i]);  in acm_poison_urbs()
165 	for (i = 0; i < acm->rx_buflimit; i++)  in acm_unpoison_urbs()
166 		usb_unpoison_urb(acm->read_urbs[i]);  in acm_unpoison_urbs()
168 		usb_unpoison_urb(acm->wb[i].urb);  in acm_unpoison_urbs()
169 	usb_unpoison_urb(acm->ctrlurb);  in acm_unpoison_urbs()
186 		wb = &acm->wb[wbn];  in acm_wb_alloc()
187 		if (!wb->use) {  in acm_wb_alloc()
188 			wb->use = true;  in acm_wb_alloc()
189 			wb->len = 0;  in acm_wb_alloc()
194 			return -1;  in acm_wb_alloc()
204 	spin_lock_irqsave(&acm->write_lock, flags);  in acm_wb_is_avail()
206 		if(acm->wb[i].use)  in acm_wb_is_avail()
207 			n--;  in acm_wb_is_avail()
208 	spin_unlock_irqrestore(&acm->write_lock, flags);  in acm_wb_is_avail()
213  * Finish write. Caller must hold acm->write_lock
217 	wb->use = false;  in acm_write_done()
218 	acm->transmitting--;  in acm_write_done()
219 	usb_autopm_put_interface_async(acm->control);  in acm_write_done()
232 	acm->transmitting++;  in acm_start_wb()
234 	wb->urb->transfer_buffer = wb->buf;  in acm_start_wb()
235 	wb->urb->transfer_dma = wb->dmah;  in acm_start_wb()
236 	wb->urb->transfer_buffer_length = wb->len;  in acm_start_wb()
237 	wb->urb->dev = acm->dev;  in acm_start_wb()
239 	rc = usb_submit_urb(wb->urb, GFP_ATOMIC);  in acm_start_wb()
241 		if (rc != -EPERM)  in acm_start_wb()
242 			dev_err(&acm->data->dev,  in acm_start_wb()
243 				"%s - usb_submit_urb(write bulk) failed: %d\n",  in acm_start_wb()
259 	return sprintf(buf, "%d", acm->ctrl_caps);  in bmCapabilities_show()
269 	memcpy(buf, acm->country_codes, acm->country_code_size);  in wCountryCodes_show()
270 	return acm->country_code_size;  in wCountryCodes_show()
281 	return sprintf(buf, "%d", acm->country_rel_date);  in iCountryCodeRelDate_show()
297 	switch (dr->bNotificationType) {  in acm_process_notification()
299 		dev_dbg(&acm->control->dev,  in acm_process_notification()
300 			"%s - network connection: %d\n", __func__, dr->wValue);  in acm_process_notification()
304 		if (le16_to_cpu(dr->wLength) != 2) {  in acm_process_notification()
305 			dev_dbg(&acm->control->dev,  in acm_process_notification()
306 				"%s - malformed serial state\n", __func__);  in acm_process_notification()
311 		dev_dbg(&acm->control->dev,  in acm_process_notification()
312 			"%s - serial state: 0x%x\n", __func__, newctrl);  in acm_process_notification()
314 		if (!acm->clocal && (acm->ctrlin & ~newctrl & USB_CDC_SERIAL_STATE_DCD)) {  in acm_process_notification()
315 			dev_dbg(&acm->control->dev,  in acm_process_notification()
316 				"%s - calling hangup\n", __func__);  in acm_process_notification()
317 			tty_port_tty_hangup(&acm->port, false);  in acm_process_notification()
320 		difference = acm->ctrlin ^ newctrl;  in acm_process_notification()
321 		spin_lock_irqsave(&acm->read_lock, flags);  in acm_process_notification()
322 		acm->ctrlin = newctrl;  in acm_process_notification()
323 		acm->oldcount = acm->iocount;  in acm_process_notification()
326 			acm->iocount.dsr++;  in acm_process_notification()
328 			acm->iocount.dcd++;  in acm_process_notification()
330 			acm->iocount.brk++;  in acm_process_notification()
331 			tty_insert_flip_char(&acm->port, 0, TTY_BREAK);  in acm_process_notification()
334 			acm->iocount.rng++;  in acm_process_notification()
336 			acm->iocount.frame++;  in acm_process_notification()
338 			acm->iocount.parity++;  in acm_process_notification()
340 			acm->iocount.overrun++;  in acm_process_notification()
341 		spin_unlock_irqrestore(&acm->read_lock, flags);  in acm_process_notification()
344 			tty_flip_buffer_push(&acm->port);  in acm_process_notification()
347 			wake_up_all(&acm->wioctl);  in acm_process_notification()
352 		dev_dbg(&acm->control->dev,  in acm_process_notification()
353 			"%s - unknown notification %d received: index %d len %d\n",  in acm_process_notification()
355 			dr->bNotificationType, dr->wIndex, dr->wLength);  in acm_process_notification()
362 	struct acm *acm = urb->context;  in acm_ctrl_irq()
363 	struct usb_cdc_notification *dr = urb->transfer_buffer;  in acm_ctrl_irq()
364 	unsigned int current_size = urb->actual_length;  in acm_ctrl_irq()
367 	int status = urb->status;  in acm_ctrl_irq()
373 	case -ECONNRESET:  in acm_ctrl_irq()
374 	case -ENOENT:  in acm_ctrl_irq()
375 	case -ESHUTDOWN:  in acm_ctrl_irq()
377 		dev_dbg(&acm->control->dev,  in acm_ctrl_irq()
378 			"%s - urb shutting down with status: %d\n",  in acm_ctrl_irq()
382 		dev_dbg(&acm->control->dev,  in acm_ctrl_irq()
383 			"%s - nonzero urb status received: %d\n",  in acm_ctrl_irq()
388 	usb_mark_last_busy(acm->dev);  in acm_ctrl_irq()
390 	if (acm->nb_index)  in acm_ctrl_irq()
391 		dr = (struct usb_cdc_notification *)acm->notification_buffer;  in acm_ctrl_irq()
393 	/* size = notification-header + (optional) data */  in acm_ctrl_irq()
395 					le16_to_cpu(dr->wLength);  in acm_ctrl_irq()
399 		if (acm->nb_size < expected_size) {  in acm_ctrl_irq()
403 			new_buffer = krealloc(acm->notification_buffer,  in acm_ctrl_irq()
406 				acm->nb_index = 0;  in acm_ctrl_irq()
410 			acm->notification_buffer = new_buffer;  in acm_ctrl_irq()
411 			acm->nb_size = alloc_size;  in acm_ctrl_irq()
412 			dr = (struct usb_cdc_notification *)acm->notification_buffer;  in acm_ctrl_irq()
416 				expected_size - acm->nb_index);  in acm_ctrl_irq()
418 		memcpy(&acm->notification_buffer[acm->nb_index],  in acm_ctrl_irq()
419 		       urb->transfer_buffer, copy_size);  in acm_ctrl_irq()
420 		acm->nb_index += copy_size;  in acm_ctrl_irq()
421 		current_size = acm->nb_index;  in acm_ctrl_irq()
427 		acm->nb_index = 0;  in acm_ctrl_irq()
432 	if (retval && retval != -EPERM && retval != -ENODEV)  in acm_ctrl_irq()
433 		dev_err(&acm->control->dev,  in acm_ctrl_irq()
434 			"%s - usb_submit_urb failed: %d\n", __func__, retval);  in acm_ctrl_irq()
436 		dev_vdbg(&acm->control->dev,  in acm_ctrl_irq()
444 	if (!test_and_clear_bit(index, &acm->read_urbs_free))  in acm_submit_read_urb()
447 	res = usb_submit_urb(acm->read_urbs[index], mem_flags);  in acm_submit_read_urb()
449 		if (res != -EPERM && res != -ENODEV) {  in acm_submit_read_urb()
450 			dev_err(&acm->data->dev,  in acm_submit_read_urb()
454 			dev_vdbg(&acm->data->dev, "intended failure %d\n", res);  in acm_submit_read_urb()
456 		set_bit(index, &acm->read_urbs_free);  in acm_submit_read_urb()
459 		dev_vdbg(&acm->data->dev, "submitted urb %d\n", index);  in acm_submit_read_urb()
470 	for (i = 0; i < acm->rx_buflimit; ++i) {  in acm_submit_read_urbs()
483 	if (!urb->actual_length)  in acm_process_read_urb()
486 	spin_lock_irqsave(&acm->read_lock, flags);  in acm_process_read_urb()
487 	tty_insert_flip_string(&acm->port, urb->transfer_buffer,  in acm_process_read_urb()
488 			urb->actual_length);  in acm_process_read_urb()
489 	spin_unlock_irqrestore(&acm->read_lock, flags);  in acm_process_read_urb()
491 	tty_flip_buffer_push(&acm->port);  in acm_process_read_urb()
496 	struct acm_rb *rb = urb->context;  in acm_read_bulk_callback()
497 	struct acm *acm = rb->instance;  in acm_read_bulk_callback()
498 	int status = urb->status;  in acm_read_bulk_callback()
503 	dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n",  in acm_read_bulk_callback()
504 		rb->index, urb->actual_length, status);  in acm_read_bulk_callback()
508 		usb_mark_last_busy(acm->dev);  in acm_read_bulk_callback()
511 	case -EPIPE:  in acm_read_bulk_callback()
512 		set_bit(EVENT_RX_STALL, &acm->flags);  in acm_read_bulk_callback()
515 	case -ENOENT:  in acm_read_bulk_callback()
516 	case -ECONNRESET:  in acm_read_bulk_callback()
517 	case -ESHUTDOWN:  in acm_read_bulk_callback()
518 		dev_dbg(&acm->data->dev,  in acm_read_bulk_callback()
519 			"%s - urb shutting down with status: %d\n",  in acm_read_bulk_callback()
523 	case -EOVERFLOW:  in acm_read_bulk_callback()
524 	case -EPROTO:  in acm_read_bulk_callback()
525 		dev_dbg(&acm->data->dev,  in acm_read_bulk_callback()
526 			"%s - cooling babbling device\n", __func__);  in acm_read_bulk_callback()
527 		usb_mark_last_busy(acm->dev);  in acm_read_bulk_callback()
528 		set_bit(rb->index, &acm->urbs_in_error_delay);  in acm_read_bulk_callback()
529 		set_bit(ACM_ERROR_DELAY, &acm->flags);  in acm_read_bulk_callback()
533 		dev_dbg(&acm->data->dev,  in acm_read_bulk_callback()
534 			"%s - nonzero urb status received: %d\n",  in acm_read_bulk_callback()
545 	set_bit(rb->index, &acm->read_urbs_free);  in acm_read_bulk_callback()
555 			schedule_delayed_work(&acm->dwork, 0);  in acm_read_bulk_callback()
557 			schedule_delayed_work(&acm->dwork, HZ / 2);  in acm_read_bulk_callback()
561 	if (test_bit(ACM_THROTTLED, &acm->flags))  in acm_read_bulk_callback()
564 	acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);  in acm_read_bulk_callback()
570 	struct acm_wb *wb = urb->context;  in acm_write_bulk()
571 	struct acm *acm = wb->instance;  in acm_write_bulk()
573 	int status = urb->status;  in acm_write_bulk()
575 	if (status || (urb->actual_length != urb->transfer_buffer_length))  in acm_write_bulk()
576 		dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n",  in acm_write_bulk()
577 			urb->actual_length,  in acm_write_bulk()
578 			urb->transfer_buffer_length,  in acm_write_bulk()
581 	spin_lock_irqsave(&acm->write_lock, flags);  in acm_write_bulk()
583 	spin_unlock_irqrestore(&acm->write_lock, flags);  in acm_write_bulk()
584 	set_bit(EVENT_TTY_WAKEUP, &acm->flags);  in acm_write_bulk()
585 	schedule_delayed_work(&acm->dwork, 0);  in acm_write_bulk()
593 	if (test_bit(EVENT_RX_STALL, &acm->flags)) {  in acm_softint()
595 		if (!acm->susp_count) {  in acm_softint()
596 			for (i = 0; i < acm->rx_buflimit; i++)  in acm_softint()
597 				usb_kill_urb(acm->read_urbs[i]);  in acm_softint()
598 			usb_clear_halt(acm->dev, acm->in);  in acm_softint()
600 			clear_bit(EVENT_RX_STALL, &acm->flags);  in acm_softint()
604 	if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) {  in acm_softint()
605 		for (i = 0; i < acm->rx_buflimit; i++)  in acm_softint()
606 			if (test_and_clear_bit(i, &acm->urbs_in_error_delay))  in acm_softint()
610 	if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags))  in acm_softint()
611 		tty_port_tty_wakeup(&acm->port);  in acm_softint()
623 	acm = acm_get_by_minor(tty->index);  in acm_tty_install()
625 		return -ENODEV;  in acm_tty_install()
635 	if (acm->quirks & DISABLE_ECHO)  in acm_tty_install()
636 		tty->termios.c_lflag &= ~ECHO;  in acm_tty_install()
638 	tty->driver_data = acm;  in acm_tty_install()
643 	tty_port_put(&acm->port);  in acm_tty_install()
649 	struct acm *acm = tty->driver_data;  in acm_tty_open()
651 	return tty_port_open(&acm->port, tty, filp);  in acm_tty_open()
666 	acm->ctrlout = val;  in acm_port_dtr_rts()
669 	if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))  in acm_port_dtr_rts()
671 		dev_dbg(&acm->control->dev, "failed to set dtr/rts\n");  in acm_port_dtr_rts()
677 	int retval = -ENODEV;  in acm_port_activate()
680 	mutex_lock(&acm->mutex);  in acm_port_activate()
681 	if (acm->disconnected)  in acm_port_activate()
684 	retval = usb_autopm_get_interface(acm->control);  in acm_port_activate()
688 	set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);  in acm_port_activate()
689 	acm->control->needs_remote_wakeup = 1;  in acm_port_activate()
691 	acm->ctrlurb->dev = acm->dev;  in acm_port_activate()
692 	retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);  in acm_port_activate()
694 		dev_err(&acm->control->dev,  in acm_port_activate()
695 			"%s - usb_submit_urb(ctrl irq) failed\n", __func__);  in acm_port_activate()
704 	clear_bit(ACM_THROTTLED, &acm->flags);  in acm_port_activate()
710 	usb_autopm_put_interface(acm->control);  in acm_port_activate()
712 	mutex_unlock(&acm->mutex);  in acm_port_activate()
717 	for (i = 0; i < acm->rx_buflimit; i++)  in acm_port_activate()
718 		usb_kill_urb(acm->read_urbs[i]);  in acm_port_activate()
719 	usb_kill_urb(acm->ctrlurb);  in acm_port_activate()
721 	usb_autopm_put_interface(acm->control);  in acm_port_activate()
724 	mutex_unlock(&acm->mutex);  in acm_port_activate()
733 	if (acm->minor != ACM_MINOR_INVALID)  in acm_port_destruct()
735 	usb_put_intf(acm->control);  in acm_port_destruct()
736 	kfree(acm->country_codes);  in acm_port_destruct()
748 	 * hold it due to the tty-port initialised flag.  in acm_port_shutdown()
751 	spin_lock_irq(&acm->write_lock);  in acm_port_shutdown()
752 	spin_unlock_irq(&acm->write_lock);  in acm_port_shutdown()
754 	usb_autopm_get_interface_no_resume(acm->control);  in acm_port_shutdown()
755 	acm->control->needs_remote_wakeup = 0;  in acm_port_shutdown()
756 	usb_autopm_put_interface(acm->control);  in acm_port_shutdown()
759 		urb = usb_get_from_anchor(&acm->delayed);  in acm_port_shutdown()
762 		wb = urb->context;  in acm_port_shutdown()
763 		wb->use = false;  in acm_port_shutdown()
764 		usb_autopm_put_interface_async(acm->control);  in acm_port_shutdown()
773 	struct acm *acm = tty->driver_data;  in acm_tty_cleanup()
775 	tty_port_put(&acm->port);  in acm_tty_cleanup()
780 	struct acm *acm = tty->driver_data;  in acm_tty_hangup()
782 	tty_port_hangup(&acm->port);  in acm_tty_hangup()
787 	struct acm *acm = tty->driver_data;  in acm_tty_close()
789 	tty_port_close(&acm->port, tty, filp);  in acm_tty_close()
795 	struct acm *acm = tty->driver_data;  in acm_tty_write()
804 	dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count);  in acm_tty_write()
806 	spin_lock_irqsave(&acm->write_lock, flags);  in acm_tty_write()
809 		spin_unlock_irqrestore(&acm->write_lock, flags);  in acm_tty_write()
812 	wb = &acm->wb[wbn];  in acm_tty_write()
814 	if (!acm->dev) {  in acm_tty_write()
815 		wb->use = false;  in acm_tty_write()
816 		spin_unlock_irqrestore(&acm->write_lock, flags);  in acm_tty_write()
817 		return -ENODEV;  in acm_tty_write()
820 	count = (count > acm->writesize) ? acm->writesize : count;  in acm_tty_write()
821 	dev_vdbg(&acm->data->dev, "writing %d bytes\n", count);  in acm_tty_write()
822 	memcpy(wb->buf, buf, count);  in acm_tty_write()
823 	wb->len = count;  in acm_tty_write()
825 	stat = usb_autopm_get_interface_async(acm->control);  in acm_tty_write()
827 		wb->use = false;  in acm_tty_write()
828 		spin_unlock_irqrestore(&acm->write_lock, flags);  in acm_tty_write()
832 	if (acm->susp_count) {  in acm_tty_write()
833 		usb_anchor_urb(wb->urb, &acm->delayed);  in acm_tty_write()
834 		spin_unlock_irqrestore(&acm->write_lock, flags);  in acm_tty_write()
839 	spin_unlock_irqrestore(&acm->write_lock, flags);  in acm_tty_write()
848 	struct acm *acm = tty->driver_data;  in acm_tty_write_room()
853 	return acm_wb_is_avail(acm) ? acm->writesize : 0;  in acm_tty_write_room()
858 	struct acm *acm = tty->driver_data;  in acm_tty_chars_in_buffer()
863 	if (acm->disconnected)  in acm_tty_chars_in_buffer()
868 	return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;  in acm_tty_chars_in_buffer()
873 	struct acm *acm = tty->driver_data;  in acm_tty_throttle()
875 	set_bit(ACM_THROTTLED, &acm->flags);  in acm_tty_throttle()
880 	struct acm *acm = tty->driver_data;  in acm_tty_unthrottle()
882 	clear_bit(ACM_THROTTLED, &acm->flags);  in acm_tty_unthrottle()
892 	struct acm *acm = tty->driver_data;  in acm_tty_break_ctl()
897 		dev_dbg(&acm->control->dev,  in acm_tty_break_ctl()
898 			"%s - send break failed\n", __func__);  in acm_tty_break_ctl()
904 	struct acm *acm = tty->driver_data;  in acm_tty_tiocmget()
906 	return (acm->ctrlout & USB_CDC_CTRL_DTR ? TIOCM_DTR : 0) |  in acm_tty_tiocmget()
907 	       (acm->ctrlout & USB_CDC_CTRL_RTS ? TIOCM_RTS : 0) |  in acm_tty_tiocmget()
908 	       (acm->ctrlin  & USB_CDC_SERIAL_STATE_DSR ? TIOCM_DSR : 0) |  in acm_tty_tiocmget()
909 	       (acm->ctrlin  & USB_CDC_SERIAL_STATE_RING_SIGNAL ? TIOCM_RI : 0) |  in acm_tty_tiocmget()
910 	       (acm->ctrlin  & USB_CDC_SERIAL_STATE_DCD ? TIOCM_CD : 0) |  in acm_tty_tiocmget()
917 	struct acm *acm = tty->driver_data;  in acm_tty_tiocmset()
920 	newctrl = acm->ctrlout;  in acm_tty_tiocmset()
928 	if (acm->ctrlout == newctrl)  in acm_tty_tiocmset()
930 	return acm_set_control(acm, acm->ctrlout = newctrl);  in acm_tty_tiocmset()
935 	struct acm *acm = tty->driver_data;  in get_serial_info()
937 	ss->line = acm->minor;  in get_serial_info()
938 	ss->close_delay	= jiffies_to_msecs(acm->port.close_delay) / 10;  in get_serial_info()
939 	ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?  in get_serial_info()
941 				jiffies_to_msecs(acm->port.closing_wait) / 10;  in get_serial_info()
947 	struct acm *acm = tty->driver_data;  in set_serial_info()
951 	close_delay = msecs_to_jiffies(ss->close_delay * 10);  in set_serial_info()
952 	closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ?  in set_serial_info()
954 			msecs_to_jiffies(ss->closing_wait * 10);  in set_serial_info()
956 	mutex_lock(&acm->port.mutex);  in set_serial_info()
959 		if ((close_delay != acm->port.close_delay) ||  in set_serial_info()
960 		    (closing_wait != acm->port.closing_wait))  in set_serial_info()
961 			retval = -EPERM;  in set_serial_info()
963 		acm->port.close_delay  = close_delay;  in set_serial_info()
964 		acm->port.closing_wait = closing_wait;  in set_serial_info()
967 	mutex_unlock(&acm->port.mutex);  in set_serial_info()
978 		spin_lock_irq(&acm->read_lock);  in wait_serial_change()
979 		old = acm->oldcount;  in wait_serial_change()
980 		new = acm->iocount;  in wait_serial_change()
981 		acm->oldcount = new;  in wait_serial_change()
982 		spin_unlock_irq(&acm->read_lock);  in wait_serial_change()
994 		add_wait_queue(&acm->wioctl, &wait);  in wait_serial_change()
997 		remove_wait_queue(&acm->wioctl, &wait);  in wait_serial_change()
998 		if (acm->disconnected) {  in wait_serial_change()
1002 				rv = -ENODEV;  in wait_serial_change()
1005 				rv = -ERESTARTSYS;  in wait_serial_change()
1017 	struct acm *acm = tty->driver_data;  in acm_tty_get_icount()
1019 	icount->dsr = acm->iocount.dsr;  in acm_tty_get_icount()
1020 	icount->rng = acm->iocount.rng;  in acm_tty_get_icount()
1021 	icount->dcd = acm->iocount.dcd;  in acm_tty_get_icount()
1022 	icount->frame = acm->iocount.frame;  in acm_tty_get_icount()
1023 	icount->overrun = acm->iocount.overrun;  in acm_tty_get_icount()
1024 	icount->parity = acm->iocount.parity;  in acm_tty_get_icount()
1025 	icount->brk = acm->iocount.brk;  in acm_tty_get_icount()
1033 	struct acm *acm = tty->driver_data;  in acm_tty_ioctl()
1034 	int rv = -ENOIOCTLCMD;  in acm_tty_ioctl()
1038 		rv = usb_autopm_get_interface(acm->control);  in acm_tty_ioctl()
1040 			rv = -EIO;  in acm_tty_ioctl()
1044 		usb_autopm_put_interface(acm->control);  in acm_tty_ioctl()
1054 	struct acm *acm = tty->driver_data;  in acm_tty_set_termios()
1055 	struct ktermios *termios = &tty->termios;  in acm_tty_set_termios()
1057 	int newctrl = acm->ctrlout;  in acm_tty_set_termios()
1060 	newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;  in acm_tty_set_termios()
1061 	newline.bParityType = termios->c_cflag & PARENB ?  in acm_tty_set_termios()
1062 				(termios->c_cflag & PARODD ? 1 : 2) +  in acm_tty_set_termios()
1063 				(termios->c_cflag & CMSPAR ? 2 : 0) : 0;  in acm_tty_set_termios()
1064 	newline.bDataBits = tty_get_char_size(termios->c_cflag);  in acm_tty_set_termios()
1067 	acm->clocal = ((termios->c_cflag & CLOCAL) != 0);  in acm_tty_set_termios()
1070 		newline.dwDTERate = acm->line.dwDTERate;  in acm_tty_set_termios()
1072 	} else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {  in acm_tty_set_termios()
1076 	if (newctrl != acm->ctrlout)  in acm_tty_set_termios()
1077 		acm_set_control(acm, acm->ctrlout = newctrl);  in acm_tty_set_termios()
1079 	if (memcmp(&acm->line, &newline, sizeof newline)) {  in acm_tty_set_termios()
1080 		memcpy(&acm->line, &newline, sizeof newline);  in acm_tty_set_termios()
1081 		dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",  in acm_tty_set_termios()
1086 		acm_set_line(acm, &acm->line);  in acm_tty_set_termios()
1107 	for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)  in acm_write_buffers_free()
1108 		usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah);  in acm_write_buffers_free()
1115 	for (i = 0; i < acm->rx_buflimit; i++)  in acm_read_buffers_free()
1116 		usb_free_coherent(acm->dev, acm->readsize,  in acm_read_buffers_free()
1117 			  acm->read_buffers[i].base, acm->read_buffers[i].dma);  in acm_read_buffers_free()
1126 	for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {  in acm_write_buffers_alloc()
1127 		wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,  in acm_write_buffers_alloc()
1128 		    &wb->dmah);  in acm_write_buffers_alloc()
1129 		if (!wb->buf) {  in acm_write_buffers_alloc()
1131 				--i;  in acm_write_buffers_alloc()
1132 				--wb;  in acm_write_buffers_alloc()
1133 				usb_free_coherent(acm->dev, acm->writesize,  in acm_write_buffers_alloc()
1134 				    wb->buf, wb->dmah);  in acm_write_buffers_alloc()
1136 			return -ENOMEM;  in acm_write_buffers_alloc()
1147 	unsigned char *buffer = intf->altsetting->extra;  in acm_probe()
1148 	int buflen = intf->altsetting->extralen;  in acm_probe()
1160 	int call_intf_num = -1;  in acm_probe()
1161 	int data_intf_num = -1;  in acm_probe()
1167 	int rv = -ENOMEM;  in acm_probe()
1171 	quirks = (unsigned long)id->driver_info;  in acm_probe()
1174 		return -ENODEV;  in acm_probe()
1186 			return -ENODEV;  in acm_probe()
1192 		dev_err(&intf->dev, "Weird descriptor references\n");  in acm_probe()
1193 		return -EINVAL;  in acm_probe()
1197 		if (intf->cur_altsetting->endpoint &&  in acm_probe()
1198 				intf->cur_altsetting->endpoint->extralen &&  in acm_probe()
1199 				intf->cur_altsetting->endpoint->extra) {  in acm_probe()
1200 			dev_dbg(&intf->dev,  in acm_probe()
1202 			buflen = intf->cur_altsetting->endpoint->extralen;  in acm_probe()
1203 			buffer = intf->cur_altsetting->endpoint->extra;  in acm_probe()
1205 			dev_err(&intf->dev,  in acm_probe()
1207 			return -EINVAL;  in acm_probe()
1215 		call_intf_num = cmgmd->bDataInterface;  in acm_probe()
1218 		if (intf->cur_altsetting->desc.bNumEndpoints == 3) {  in acm_probe()
1219 			dev_dbg(&intf->dev, "No union descriptor, assuming single interface\n");  in acm_probe()
1224 			dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");  in acm_probe()
1229 			dev_dbg(&intf->dev, "No union descriptor, giving up\n");  in acm_probe()
1230 			return -ENODEV;  in acm_probe()
1233 		int class = -1;  in acm_probe()
1235 		data_intf_num = union_header->bSlaveInterface0;  in acm_probe()
1236 		control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);  in acm_probe()
1240 			class = control_interface->cur_altsetting->desc.bInterfaceClass;  in acm_probe()
1243 			dev_dbg(&intf->dev, "Broken union descriptor, assuming single interface\n");  in acm_probe()
1251 		dev_dbg(&intf->dev, "no interfaces\n");  in acm_probe()
1252 		return -ENODEV;  in acm_probe()
1256 		dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");  in acm_probe()
1260 		dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");  in acm_probe()
1264 		if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {  in acm_probe()
1265 			dev_err(&intf->dev, "This needs exactly 3 endpoints\n");  in acm_probe()
1266 			return -EINVAL;  in acm_probe()
1269 		res = usb_find_common_endpoints(data_interface->cur_altsetting,  in acm_probe()
1280 	if (data_interface->cur_altsetting->desc.bInterfaceClass != USB_CLASS_CDC_DATA) {  in acm_probe()
1281 		if (control_interface->cur_altsetting->desc.bInterfaceClass == USB_CLASS_CDC_DATA) {  in acm_probe()
1282 			dev_dbg(&intf->dev,  in acm_probe()
1286 			return -EINVAL;  in acm_probe()
1292 		return -ENODEV;  in acm_probe()
1294 	if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||  in acm_probe()
1295 	    control_interface->cur_altsetting->desc.bNumEndpoints == 0)  in acm_probe()
1296 		return -EINVAL;  in acm_probe()
1298 	epctrl = &control_interface->cur_altsetting->endpoint[0].desc;  in acm_probe()
1299 	epread = &data_interface->cur_altsetting->endpoint[0].desc;  in acm_probe()
1300 	epwrite = &data_interface->cur_altsetting->endpoint[1].desc;  in acm_probe()
1306 		dev_dbg(&intf->dev,  in acm_probe()
1311 	dev_dbg(&intf->dev, "interfaces are valid\n");  in acm_probe()
1315 		return -ENOMEM;  in acm_probe()
1317 	tty_port_init(&acm->port);  in acm_probe()
1318 	acm->port.ops = &acm_port_ops;  in acm_probe()
1323 	acm->combined_interfaces = combined_interfaces;  in acm_probe()
1324 	acm->writesize = usb_endpoint_maxp(epwrite) * 20;  in acm_probe()
1325 	acm->control = control_interface;  in acm_probe()
1326 	acm->data = data_interface;  in acm_probe()
1328 	usb_get_intf(acm->control); /* undone in destruct() */  in acm_probe()
1332 		acm->minor = ACM_MINOR_INVALID;  in acm_probe()
1336 	acm->minor = minor;  in acm_probe()
1337 	acm->dev = usb_dev;  in acm_probe()
1339 		acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities;  in acm_probe()
1341 		acm->ctrl_caps &= ~USB_CDC_CAP_LINE;  in acm_probe()
1342 	acm->ctrlsize = ctrlsize;  in acm_probe()
1343 	acm->readsize = readsize;  in acm_probe()
1344 	acm->rx_buflimit = num_rx_buf;  in acm_probe()
1345 	INIT_DELAYED_WORK(&acm->dwork, acm_softint);  in acm_probe()
1346 	init_waitqueue_head(&acm->wioctl);  in acm_probe()
1347 	spin_lock_init(&acm->write_lock);  in acm_probe()
1348 	spin_lock_init(&acm->read_lock);  in acm_probe()
1349 	mutex_init(&acm->mutex);  in acm_probe()
1351 		acm->bInterval = epread->bInterval;  in acm_probe()
1352 		acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress);  in acm_probe()
1354 		acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);  in acm_probe()
1357 		acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress);  in acm_probe()
1359 		acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress);  in acm_probe()
1360 	init_usb_anchor(&acm->delayed);  in acm_probe()
1361 	acm->quirks = quirks;  in acm_probe()
1363 	buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);  in acm_probe()
1366 	acm->ctrl_buffer = buf;  in acm_probe()
1371 	acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);  in acm_probe()
1372 	if (!acm->ctrlurb)  in acm_probe()
1376 		struct acm_rb *rb = &(acm->read_buffers[i]);  in acm_probe()
1379 		rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,  in acm_probe()
1380 								&rb->dma);  in acm_probe()
1381 		if (!rb->base)  in acm_probe()
1383 		rb->index = i;  in acm_probe()
1384 		rb->instance = acm;  in acm_probe()
1390 		urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;  in acm_probe()
1391 		urb->transfer_dma = rb->dma;  in acm_probe()
1393 			usb_fill_int_urb(urb, acm->dev, acm->in, rb->base,  in acm_probe()
1394 					 acm->readsize,  in acm_probe()
1396 					 acm->bInterval);  in acm_probe()
1398 			usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base,  in acm_probe()
1399 					  acm->readsize,  in acm_probe()
1402 		acm->read_urbs[i] = urb;  in acm_probe()
1403 		__set_bit(i, &acm->read_urbs_free);  in acm_probe()
1406 		struct acm_wb *snd = &(acm->wb[i]);  in acm_probe()
1408 		snd->urb = usb_alloc_urb(0, GFP_KERNEL);  in acm_probe()
1409 		if (!snd->urb)  in acm_probe()
1413 			usb_fill_int_urb(snd->urb, usb_dev, acm->out,  in acm_probe()
1414 				NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);  in acm_probe()
1416 			usb_fill_bulk_urb(snd->urb, usb_dev, acm->out,  in acm_probe()
1417 				NULL, acm->writesize, acm_write_bulk, snd);  in acm_probe()
1418 		snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;  in acm_probe()
1420 			snd->urb->transfer_flags |= URB_ZERO_PACKET;  in acm_probe()
1421 		snd->instance = acm;  in acm_probe()
1426 	i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);  in acm_probe()
1434 		acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);  in acm_probe()
1435 		if (!acm->country_codes)  in acm_probe()
1437 		acm->country_code_size = cfd->bLength - 4;  in acm_probe()
1438 		memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,  in acm_probe()
1439 							cfd->bLength - 4);  in acm_probe()
1440 		acm->country_rel_date = cfd->iCountryCodeRelDate;  in acm_probe()
1442 		i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);  in acm_probe()
1444 			kfree(acm->country_codes);  in acm_probe()
1445 			acm->country_codes = NULL;  in acm_probe()
1446 			acm->country_code_size = 0;  in acm_probe()
1450 		i = device_create_file(&intf->dev,  in acm_probe()
1453 			device_remove_file(&intf->dev, &dev_attr_wCountryCodes);  in acm_probe()
1454 			kfree(acm->country_codes);  in acm_probe()
1455 			acm->country_codes = NULL;  in acm_probe()
1456 			acm->country_code_size = 0;  in acm_probe()
1462 	usb_fill_int_urb(acm->ctrlurb, usb_dev,  in acm_probe()
1463 			 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),  in acm_probe()
1464 			 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,  in acm_probe()
1466 			 epctrl->bInterval ? epctrl->bInterval : 16);  in acm_probe()
1467 	acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;  in acm_probe()
1468 	acm->ctrlurb->transfer_dma = acm->ctrl_dma;  in acm_probe()
1469 	acm->notification_buffer = NULL;  in acm_probe()
1470 	acm->nb_index = 0;  in acm_probe()
1471 	acm->nb_size = 0;  in acm_probe()
1473 	acm->line.dwDTERate = cpu_to_le32(9600);  in acm_probe()
1474 	acm->line.bDataBits = 8;  in acm_probe()
1475 	acm_set_line(acm, &acm->line);  in acm_probe()
1477 	if (!acm->combined_interfaces) {  in acm_probe()
1483 	tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,  in acm_probe()
1484 			&control_interface->dev);  in acm_probe()
1491 		usb_clear_halt(usb_dev, acm->in);  in acm_probe()
1492 		usb_clear_halt(usb_dev, acm->out);  in acm_probe()
1495 	dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);  in acm_probe()
1500 	if (!acm->combined_interfaces) {  in acm_probe()
1506 	if (acm->country_codes) {  in acm_probe()
1507 		device_remove_file(&acm->control->dev,  in acm_probe()
1509 		device_remove_file(&acm->control->dev,  in acm_probe()
1512 	device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);  in acm_probe()
1515 		usb_free_urb(acm->wb[i].urb);  in acm_probe()
1518 		usb_free_urb(acm->read_urbs[i]);  in acm_probe()
1520 	usb_free_urb(acm->ctrlurb);  in acm_probe()
1524 	usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);  in acm_probe()
1526 	tty_port_put(&acm->port);  in acm_probe()
1541 	acm->disconnected = true;  in acm_disconnect()
1548 	mutex_lock(&acm->mutex);  in acm_disconnect()
1549 	if (acm->country_codes) {  in acm_disconnect()
1550 		device_remove_file(&acm->control->dev,  in acm_disconnect()
1552 		device_remove_file(&acm->control->dev,  in acm_disconnect()
1555 	wake_up_all(&acm->wioctl);  in acm_disconnect()
1556 	device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);  in acm_disconnect()
1557 	usb_set_intfdata(acm->control, NULL);  in acm_disconnect()
1558 	usb_set_intfdata(acm->data, NULL);  in acm_disconnect()
1559 	mutex_unlock(&acm->mutex);  in acm_disconnect()
1561 	tty = tty_port_tty_get(&acm->port);  in acm_disconnect()
1567 	cancel_delayed_work_sync(&acm->dwork);  in acm_disconnect()
1569 	tty_unregister_device(acm_tty_driver, acm->minor);  in acm_disconnect()
1571 	usb_free_urb(acm->ctrlurb);  in acm_disconnect()
1573 		usb_free_urb(acm->wb[i].urb);  in acm_disconnect()
1574 	for (i = 0; i < acm->rx_buflimit; i++)  in acm_disconnect()
1575 		usb_free_urb(acm->read_urbs[i]);  in acm_disconnect()
1577 	usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);  in acm_disconnect()
1580 	kfree(acm->notification_buffer);  in acm_disconnect()
1582 	if (!acm->combined_interfaces)  in acm_disconnect()
1583 		usb_driver_release_interface(&acm_driver, intf == acm->control ?  in acm_disconnect()
1584 					acm->data : acm->control);  in acm_disconnect()
1586 	tty_port_put(&acm->port);  in acm_disconnect()
1595 	spin_lock_irq(&acm->write_lock);  in acm_suspend()
1597 		if (acm->transmitting) {  in acm_suspend()
1598 			spin_unlock_irq(&acm->write_lock);  in acm_suspend()
1599 			return -EBUSY;  in acm_suspend()
1602 	cnt = acm->susp_count++;  in acm_suspend()
1603 	spin_unlock_irq(&acm->write_lock);  in acm_suspend()
1609 	cancel_delayed_work_sync(&acm->dwork);  in acm_suspend()
1610 	acm->urbs_in_error_delay = 0;  in acm_suspend()
1621 	spin_lock_irq(&acm->write_lock);  in acm_resume()
1623 	if (--acm->susp_count)  in acm_resume()
1628 	if (tty_port_initialized(&acm->port)) {  in acm_resume()
1629 		rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);  in acm_resume()
1632 			urb = usb_get_from_anchor(&acm->delayed);  in acm_resume()
1636 			acm_start_wb(acm, urb->context);  in acm_resume()
1649 	spin_unlock_irq(&acm->write_lock);  in acm_resume()
1658 	if (tty_port_initialized(&acm->port))  in acm_reset_resume()
1659 		tty_port_tty_hangup(&acm->port, false);  in acm_reset_resume()
1670 	clear_bit(EVENT_RX_STALL, &acm->flags);  in acm_pre_reset()
1671 	acm->nb_index = 0; /* pending control transfers are lost */  in acm_pre_reset()
1694 	{ USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1719 	{ USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1722 	{ USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1731 	{ USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1749 	{ USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1752 	{ USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1760 	{ USB_DEVICE(0x2184, 0x001c) },	/* GW Instek AFG-2225 */
1761 	{ USB_DEVICE(0x2184, 0x0036) },	/* GW Instek AFG-125 */
1795 	{ USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1801 	{ USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1807 	{ USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */
1825 	 * a modem and is picked up by the standard AT-command
1826 	 * information below. The second is 'vendor-specific' but
1859 	{ NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1861 	{ NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1862 	{ NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1867 	{ NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3  */
1870 	{ NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1871 	{ NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1890 	/* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1967 	/* control interfaces with various AT-command sets */
2020 	.throttle =		acm_tty_throttle,
2043 	acm_tty_driver->driver_name = "acm",  in acm_init()
2044 	acm_tty_driver->name = "ttyACM",  in acm_init()
2045 	acm_tty_driver->major = ACM_TTY_MAJOR,  in acm_init()
2046 	acm_tty_driver->minor_start = 0,  in acm_init()
2047 	acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,  in acm_init()
2048 	acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,  in acm_init()
2049 	acm_tty_driver->init_termios = tty_std_termios;  in acm_init()
2050 	acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |  in acm_init()