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>
12 * USB Abstract Control Model driver for USB modems and ISDN adapters
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
34 #include <linux/kernel.h>
35 #include <linux/errno.h>
36 #include <linux/init.h>
37 #include <linux/slab.h>
38 #include <linux/tty.h>
39 #include <linux/serial.h>
40 #include <linux/tty_driver.h>
41 #include <linux/tty_flip.h>
42 #include <linux/module.h>
43 #include <linux/mutex.h>
44 #include <linux/uaccess.h>
45 #include <linux/usb.h>
46 #include <linux/usb/cdc.h>
47 #include <asm/byteorder.h>
48 #include <asm/unaligned.h>
49 #include <linux/idr.h>
50 #include <linux/list.h>
55 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
56 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
58 static struct usb_driver acm_driver
;
59 static struct tty_driver
*acm_tty_driver
;
61 static DEFINE_IDR(acm_minors
);
62 static DEFINE_MUTEX(acm_minors_lock
);
64 static void acm_tty_set_termios(struct tty_struct
*tty
,
65 struct ktermios
*termios_old
);
68 * acm_minors accessors
72 * Look up an ACM structure by minor. If found and not disconnected, increment
73 * its refcount and return it with its mutex held.
75 static struct acm
*acm_get_by_minor(unsigned int minor
)
79 mutex_lock(&acm_minors_lock
);
80 acm
= idr_find(&acm_minors
, minor
);
82 mutex_lock(&acm
->mutex
);
83 if (acm
->disconnected
) {
84 mutex_unlock(&acm
->mutex
);
87 tty_port_get(&acm
->port
);
88 mutex_unlock(&acm
->mutex
);
91 mutex_unlock(&acm_minors_lock
);
96 * Try to find an available minor number and if found, associate it with 'acm'.
98 static int acm_alloc_minor(struct acm
*acm
)
102 mutex_lock(&acm_minors_lock
);
103 minor
= idr_alloc(&acm_minors
, acm
, 0, ACM_TTY_MINORS
, GFP_KERNEL
);
104 mutex_unlock(&acm_minors_lock
);
109 /* Release the minor number associated with 'acm'. */
110 static void acm_release_minor(struct acm
*acm
)
112 mutex_lock(&acm_minors_lock
);
113 idr_remove(&acm_minors
, acm
->minor
);
114 mutex_unlock(&acm_minors_lock
);
118 * Functions for ACM control messages.
121 static int acm_ctrl_msg(struct acm
*acm
, int request
, int value
,
126 retval
= usb_autopm_get_interface(acm
->control
);
130 retval
= usb_control_msg(acm
->dev
, usb_sndctrlpipe(acm
->dev
, 0),
131 request
, USB_RT_ACM
, value
,
132 acm
->control
->altsetting
[0].desc
.bInterfaceNumber
,
135 dev_dbg(&acm
->control
->dev
,
136 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
137 __func__
, request
, value
, len
, retval
);
139 usb_autopm_put_interface(acm
->control
);
141 return retval
< 0 ? retval
: 0;
144 /* devices aren't required to support these requests.
145 * the cdc acm descriptor tells whether they do...
147 static inline int acm_set_control(struct acm
*acm
, int control
)
149 if (acm
->quirks
& QUIRK_CONTROL_LINE_STATE
)
152 return acm_ctrl_msg(acm
, USB_CDC_REQ_SET_CONTROL_LINE_STATE
,
156 #define acm_set_line(acm, line) \
157 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
158 #define acm_send_break(acm, ms) \
159 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
162 * Write buffer management.
163 * All of these assume proper locks taken by the caller.
166 static int acm_wb_alloc(struct acm
*acm
)
179 wbn
= (wbn
+ 1) % ACM_NW
;
185 static int acm_wb_is_avail(struct acm
*acm
)
191 spin_lock_irqsave(&acm
->write_lock
, flags
);
192 for (i
= 0; i
< ACM_NW
; i
++)
194 spin_unlock_irqrestore(&acm
->write_lock
, flags
);
199 * Finish write. Caller must hold acm->write_lock
201 static void acm_write_done(struct acm
*acm
, struct acm_wb
*wb
)
205 usb_autopm_put_interface_async(acm
->control
);
211 * the caller is responsible for locking
214 static int acm_start_wb(struct acm
*acm
, struct acm_wb
*wb
)
220 wb
->urb
->transfer_buffer
= wb
->buf
;
221 wb
->urb
->transfer_dma
= wb
->dmah
;
222 wb
->urb
->transfer_buffer_length
= wb
->len
;
223 wb
->urb
->dev
= acm
->dev
;
225 rc
= usb_submit_urb(wb
->urb
, GFP_ATOMIC
);
227 dev_err(&acm
->data
->dev
,
228 "%s - usb_submit_urb(write bulk) failed: %d\n",
230 acm_write_done(acm
, wb
);
236 * attributes exported through sysfs
238 static ssize_t show_caps
239 (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
241 struct usb_interface
*intf
= to_usb_interface(dev
);
242 struct acm
*acm
= usb_get_intfdata(intf
);
244 return sprintf(buf
, "%d", acm
->ctrl_caps
);
246 static DEVICE_ATTR(bmCapabilities
, S_IRUGO
, show_caps
, NULL
);
248 static ssize_t show_country_codes
249 (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
251 struct usb_interface
*intf
= to_usb_interface(dev
);
252 struct acm
*acm
= usb_get_intfdata(intf
);
254 memcpy(buf
, acm
->country_codes
, acm
->country_code_size
);
255 return acm
->country_code_size
;
258 static DEVICE_ATTR(wCountryCodes
, S_IRUGO
, show_country_codes
, NULL
);
260 static ssize_t show_country_rel_date
261 (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
263 struct usb_interface
*intf
= to_usb_interface(dev
);
264 struct acm
*acm
= usb_get_intfdata(intf
);
266 return sprintf(buf
, "%d", acm
->country_rel_date
);
269 static DEVICE_ATTR(iCountryCodeRelDate
, S_IRUGO
, show_country_rel_date
, NULL
);
271 * Interrupt handlers for various ACM device responses
274 /* control interface reports status changes with "interrupt" transfers */
275 static void acm_ctrl_irq(struct urb
*urb
)
277 struct acm
*acm
= urb
->context
;
278 struct usb_cdc_notification
*dr
= urb
->transfer_buffer
;
283 int status
= urb
->status
;
292 /* this urb is terminated, clean up */
293 dev_dbg(&acm
->control
->dev
,
294 "%s - urb shutting down with status: %d\n",
298 dev_dbg(&acm
->control
->dev
,
299 "%s - nonzero urb status received: %d\n",
304 usb_mark_last_busy(acm
->dev
);
306 data
= (unsigned char *)(dr
+ 1);
307 switch (dr
->bNotificationType
) {
308 case USB_CDC_NOTIFY_NETWORK_CONNECTION
:
309 dev_dbg(&acm
->control
->dev
, "%s - network connection: %d\n",
310 __func__
, dr
->wValue
);
313 case USB_CDC_NOTIFY_SERIAL_STATE
:
314 newctrl
= get_unaligned_le16(data
);
316 if (!acm
->clocal
&& (acm
->ctrlin
& ~newctrl
& ACM_CTRL_DCD
)) {
317 dev_dbg(&acm
->control
->dev
, "%s - calling hangup\n",
319 tty_port_tty_hangup(&acm
->port
, false);
322 difference
= acm
->ctrlin
^ newctrl
;
323 spin_lock(&acm
->read_lock
);
324 acm
->ctrlin
= newctrl
;
325 acm
->oldcount
= acm
->iocount
;
327 if (difference
& ACM_CTRL_DSR
)
329 if (difference
& ACM_CTRL_BRK
)
331 if (difference
& ACM_CTRL_RI
)
333 if (difference
& ACM_CTRL_DCD
)
335 if (difference
& ACM_CTRL_FRAMING
)
336 acm
->iocount
.frame
++;
337 if (difference
& ACM_CTRL_PARITY
)
338 acm
->iocount
.parity
++;
339 if (difference
& ACM_CTRL_OVERRUN
)
340 acm
->iocount
.overrun
++;
341 spin_unlock(&acm
->read_lock
);
344 wake_up_all(&acm
->wioctl
);
349 dev_dbg(&acm
->control
->dev
,
350 "%s - unknown notification %d received: index %d "
351 "len %d data0 %d data1 %d\n",
353 dr
->bNotificationType
, dr
->wIndex
,
354 dr
->wLength
, data
[0], data
[1]);
358 retval
= usb_submit_urb(urb
, GFP_ATOMIC
);
359 if (retval
&& retval
!= -EPERM
)
360 dev_err(&acm
->control
->dev
, "%s - usb_submit_urb failed: %d\n",
364 static int acm_submit_read_urb(struct acm
*acm
, int index
, gfp_t mem_flags
)
368 if (!test_and_clear_bit(index
, &acm
->read_urbs_free
))
371 dev_vdbg(&acm
->data
->dev
, "%s - urb %d\n", __func__
, index
);
373 res
= usb_submit_urb(acm
->read_urbs
[index
], mem_flags
);
376 dev_err(&acm
->data
->dev
,
377 "%s - usb_submit_urb failed: %d\n",
380 set_bit(index
, &acm
->read_urbs_free
);
387 static int acm_submit_read_urbs(struct acm
*acm
, gfp_t mem_flags
)
392 for (i
= 0; i
< acm
->rx_buflimit
; ++i
) {
393 res
= acm_submit_read_urb(acm
, i
, mem_flags
);
401 static void acm_process_read_urb(struct acm
*acm
, struct urb
*urb
)
403 if (!urb
->actual_length
)
406 tty_insert_flip_string(&acm
->port
, urb
->transfer_buffer
,
408 tty_flip_buffer_push(&acm
->port
);
411 static void acm_read_bulk_callback(struct urb
*urb
)
413 struct acm_rb
*rb
= urb
->context
;
414 struct acm
*acm
= rb
->instance
;
416 int status
= urb
->status
;
418 dev_vdbg(&acm
->data
->dev
, "%s - urb %d, len %d\n", __func__
,
419 rb
->index
, urb
->actual_length
);
422 set_bit(rb
->index
, &acm
->read_urbs_free
);
423 dev_dbg(&acm
->data
->dev
, "%s - disconnected\n", __func__
);
428 set_bit(rb
->index
, &acm
->read_urbs_free
);
429 dev_dbg(&acm
->data
->dev
, "%s - non-zero urb status: %d\n",
431 if ((status
!= -ENOENT
) || (urb
->actual_length
== 0))
435 usb_mark_last_busy(acm
->dev
);
437 acm_process_read_urb(acm
, urb
);
439 * Unthrottle may run on another CPU which needs to see events
440 * in the same order. Submission has an implict barrier
442 smp_mb__before_atomic();
443 set_bit(rb
->index
, &acm
->read_urbs_free
);
445 /* throttle device if requested by tty */
446 spin_lock_irqsave(&acm
->read_lock
, flags
);
447 acm
->throttled
= acm
->throttle_req
;
448 if (!acm
->throttled
) {
449 spin_unlock_irqrestore(&acm
->read_lock
, flags
);
450 acm_submit_read_urb(acm
, rb
->index
, GFP_ATOMIC
);
452 spin_unlock_irqrestore(&acm
->read_lock
, flags
);
456 /* data interface wrote those outgoing bytes */
457 static void acm_write_bulk(struct urb
*urb
)
459 struct acm_wb
*wb
= urb
->context
;
460 struct acm
*acm
= wb
->instance
;
462 int status
= urb
->status
;
464 if (status
|| (urb
->actual_length
!= urb
->transfer_buffer_length
))
465 dev_vdbg(&acm
->data
->dev
, "%s - len %d/%d, status %d\n",
468 urb
->transfer_buffer_length
,
471 spin_lock_irqsave(&acm
->write_lock
, flags
);
472 acm_write_done(acm
, wb
);
473 spin_unlock_irqrestore(&acm
->write_lock
, flags
);
474 schedule_work(&acm
->work
);
477 static void acm_softint(struct work_struct
*work
)
479 struct acm
*acm
= container_of(work
, struct acm
, work
);
481 dev_vdbg(&acm
->data
->dev
, "%s\n", __func__
);
483 tty_port_tty_wakeup(&acm
->port
);
490 static int acm_tty_install(struct tty_driver
*driver
, struct tty_struct
*tty
)
495 dev_dbg(tty
->dev
, "%s\n", __func__
);
497 acm
= acm_get_by_minor(tty
->index
);
501 retval
= tty_standard_install(driver
, tty
);
503 goto error_init_termios
;
505 tty
->driver_data
= acm
;
510 tty_port_put(&acm
->port
);
514 static int acm_tty_open(struct tty_struct
*tty
, struct file
*filp
)
516 struct acm
*acm
= tty
->driver_data
;
518 dev_dbg(tty
->dev
, "%s\n", __func__
);
520 return tty_port_open(&acm
->port
, tty
, filp
);
523 static void acm_port_dtr_rts(struct tty_port
*port
, int raise
)
525 struct acm
*acm
= container_of(port
, struct acm
, port
);
530 val
= ACM_CTRL_DTR
| ACM_CTRL_RTS
;
534 /* FIXME: add missing ctrlout locking throughout driver */
537 res
= acm_set_control(acm
, val
);
538 if (res
&& (acm
->ctrl_caps
& USB_CDC_CAP_LINE
))
539 dev_err(&acm
->control
->dev
, "failed to set dtr/rts\n");
542 static int acm_port_activate(struct tty_port
*port
, struct tty_struct
*tty
)
544 struct acm
*acm
= container_of(port
, struct acm
, port
);
545 int retval
= -ENODEV
;
548 dev_dbg(&acm
->control
->dev
, "%s\n", __func__
);
550 mutex_lock(&acm
->mutex
);
551 if (acm
->disconnected
)
554 retval
= usb_autopm_get_interface(acm
->control
);
556 goto error_get_interface
;
559 * FIXME: Why do we need this? Allocating 64K of physically contiguous
560 * memory is really nasty...
562 set_bit(TTY_NO_WRITE_SPLIT
, &tty
->flags
);
563 acm
->control
->needs_remote_wakeup
= 1;
565 acm
->ctrlurb
->dev
= acm
->dev
;
566 retval
= usb_submit_urb(acm
->ctrlurb
, GFP_KERNEL
);
568 dev_err(&acm
->control
->dev
,
569 "%s - usb_submit_urb(ctrl irq) failed\n", __func__
);
570 goto error_submit_urb
;
573 acm_tty_set_termios(tty
, NULL
);
576 * Unthrottle device in case the TTY was closed while throttled.
578 spin_lock_irq(&acm
->read_lock
);
580 acm
->throttle_req
= 0;
581 spin_unlock_irq(&acm
->read_lock
);
583 retval
= acm_submit_read_urbs(acm
, GFP_KERNEL
);
585 goto error_submit_read_urbs
;
587 usb_autopm_put_interface(acm
->control
);
589 mutex_unlock(&acm
->mutex
);
593 error_submit_read_urbs
:
594 for (i
= 0; i
< acm
->rx_buflimit
; i
++)
595 usb_kill_urb(acm
->read_urbs
[i
]);
596 usb_kill_urb(acm
->ctrlurb
);
598 usb_autopm_put_interface(acm
->control
);
601 mutex_unlock(&acm
->mutex
);
603 return usb_translate_errors(retval
);
606 static void acm_port_destruct(struct tty_port
*port
)
608 struct acm
*acm
= container_of(port
, struct acm
, port
);
610 dev_dbg(&acm
->control
->dev
, "%s\n", __func__
);
612 acm_release_minor(acm
);
613 usb_put_intf(acm
->control
);
614 kfree(acm
->country_codes
);
618 static void acm_port_shutdown(struct tty_port
*port
)
620 struct acm
*acm
= container_of(port
, struct acm
, port
);
625 dev_dbg(&acm
->control
->dev
, "%s\n", __func__
);
628 * Need to grab write_lock to prevent race with resume, but no need to
629 * hold it due to the tty-port initialised flag.
631 spin_lock_irq(&acm
->write_lock
);
632 spin_unlock_irq(&acm
->write_lock
);
634 usb_autopm_get_interface_no_resume(acm
->control
);
635 acm
->control
->needs_remote_wakeup
= 0;
636 usb_autopm_put_interface(acm
->control
);
639 urb
= usb_get_from_anchor(&acm
->delayed
);
644 usb_autopm_put_interface_async(acm
->control
);
647 usb_kill_urb(acm
->ctrlurb
);
648 for (i
= 0; i
< ACM_NW
; i
++)
649 usb_kill_urb(acm
->wb
[i
].urb
);
650 for (i
= 0; i
< acm
->rx_buflimit
; i
++)
651 usb_kill_urb(acm
->read_urbs
[i
]);
654 static void acm_tty_cleanup(struct tty_struct
*tty
)
656 struct acm
*acm
= tty
->driver_data
;
657 dev_dbg(&acm
->control
->dev
, "%s\n", __func__
);
658 tty_port_put(&acm
->port
);
661 static void acm_tty_hangup(struct tty_struct
*tty
)
663 struct acm
*acm
= tty
->driver_data
;
664 dev_dbg(&acm
->control
->dev
, "%s\n", __func__
);
665 tty_port_hangup(&acm
->port
);
668 static void acm_tty_close(struct tty_struct
*tty
, struct file
*filp
)
670 struct acm
*acm
= tty
->driver_data
;
671 dev_dbg(&acm
->control
->dev
, "%s\n", __func__
);
672 tty_port_close(&acm
->port
, tty
, filp
);
675 static int acm_tty_write(struct tty_struct
*tty
,
676 const unsigned char *buf
, int count
)
678 struct acm
*acm
= tty
->driver_data
;
687 dev_vdbg(&acm
->data
->dev
, "%s - count %d\n", __func__
, count
);
689 spin_lock_irqsave(&acm
->write_lock
, flags
);
690 wbn
= acm_wb_alloc(acm
);
692 spin_unlock_irqrestore(&acm
->write_lock
, flags
);
699 spin_unlock_irqrestore(&acm
->write_lock
, flags
);
703 count
= (count
> acm
->writesize
) ? acm
->writesize
: count
;
704 dev_vdbg(&acm
->data
->dev
, "%s - write %d\n", __func__
, count
);
705 memcpy(wb
->buf
, buf
, count
);
708 stat
= usb_autopm_get_interface_async(acm
->control
);
711 spin_unlock_irqrestore(&acm
->write_lock
, flags
);
715 if (acm
->susp_count
) {
716 usb_anchor_urb(wb
->urb
, &acm
->delayed
);
717 spin_unlock_irqrestore(&acm
->write_lock
, flags
);
721 stat
= acm_start_wb(acm
, wb
);
722 spin_unlock_irqrestore(&acm
->write_lock
, flags
);
729 static int acm_tty_write_room(struct tty_struct
*tty
)
731 struct acm
*acm
= tty
->driver_data
;
733 * Do not let the line discipline to know that we have a reserve,
734 * or it might get too enthusiastic.
736 return acm_wb_is_avail(acm
) ? acm
->writesize
: 0;
739 static int acm_tty_chars_in_buffer(struct tty_struct
*tty
)
741 struct acm
*acm
= tty
->driver_data
;
743 * if the device was unplugged then any remaining characters fell out
744 * of the connector ;)
746 if (acm
->disconnected
)
749 * This is inaccurate (overcounts), but it works.
751 return (ACM_NW
- acm_wb_is_avail(acm
)) * acm
->writesize
;
754 static void acm_tty_throttle(struct tty_struct
*tty
)
756 struct acm
*acm
= tty
->driver_data
;
758 spin_lock_irq(&acm
->read_lock
);
759 acm
->throttle_req
= 1;
760 spin_unlock_irq(&acm
->read_lock
);
763 static void acm_tty_unthrottle(struct tty_struct
*tty
)
765 struct acm
*acm
= tty
->driver_data
;
766 unsigned int was_throttled
;
768 spin_lock_irq(&acm
->read_lock
);
769 was_throttled
= acm
->throttled
;
771 acm
->throttle_req
= 0;
772 spin_unlock_irq(&acm
->read_lock
);
775 acm_submit_read_urbs(acm
, GFP_KERNEL
);
778 static int acm_tty_break_ctl(struct tty_struct
*tty
, int state
)
780 struct acm
*acm
= tty
->driver_data
;
783 retval
= acm_send_break(acm
, state
? 0xffff : 0);
785 dev_dbg(&acm
->control
->dev
, "%s - send break failed\n",
790 static int acm_tty_tiocmget(struct tty_struct
*tty
)
792 struct acm
*acm
= tty
->driver_data
;
794 return (acm
->ctrlout
& ACM_CTRL_DTR
? TIOCM_DTR
: 0) |
795 (acm
->ctrlout
& ACM_CTRL_RTS
? TIOCM_RTS
: 0) |
796 (acm
->ctrlin
& ACM_CTRL_DSR
? TIOCM_DSR
: 0) |
797 (acm
->ctrlin
& ACM_CTRL_RI
? TIOCM_RI
: 0) |
798 (acm
->ctrlin
& ACM_CTRL_DCD
? TIOCM_CD
: 0) |
802 static int acm_tty_tiocmset(struct tty_struct
*tty
,
803 unsigned int set
, unsigned int clear
)
805 struct acm
*acm
= tty
->driver_data
;
806 unsigned int newctrl
;
808 newctrl
= acm
->ctrlout
;
809 set
= (set
& TIOCM_DTR
? ACM_CTRL_DTR
: 0) |
810 (set
& TIOCM_RTS
? ACM_CTRL_RTS
: 0);
811 clear
= (clear
& TIOCM_DTR
? ACM_CTRL_DTR
: 0) |
812 (clear
& TIOCM_RTS
? ACM_CTRL_RTS
: 0);
814 newctrl
= (newctrl
& ~clear
) | set
;
816 if (acm
->ctrlout
== newctrl
)
818 return acm_set_control(acm
, acm
->ctrlout
= newctrl
);
821 static int get_serial_info(struct acm
*acm
, struct serial_struct __user
*info
)
823 struct serial_struct tmp
;
828 memset(&tmp
, 0, sizeof(tmp
));
829 tmp
.flags
= ASYNC_LOW_LATENCY
;
830 tmp
.xmit_fifo_size
= acm
->writesize
;
831 tmp
.baud_base
= le32_to_cpu(acm
->line
.dwDTERate
);
832 tmp
.close_delay
= acm
->port
.close_delay
/ 10;
833 tmp
.closing_wait
= acm
->port
.closing_wait
== ASYNC_CLOSING_WAIT_NONE
?
834 ASYNC_CLOSING_WAIT_NONE
:
835 acm
->port
.closing_wait
/ 10;
837 if (copy_to_user(info
, &tmp
, sizeof(tmp
)))
843 static int set_serial_info(struct acm
*acm
,
844 struct serial_struct __user
*newinfo
)
846 struct serial_struct new_serial
;
847 unsigned int closing_wait
, close_delay
;
850 if (copy_from_user(&new_serial
, newinfo
, sizeof(new_serial
)))
853 close_delay
= new_serial
.close_delay
* 10;
854 closing_wait
= new_serial
.closing_wait
== ASYNC_CLOSING_WAIT_NONE
?
855 ASYNC_CLOSING_WAIT_NONE
: new_serial
.closing_wait
* 10;
857 mutex_lock(&acm
->port
.mutex
);
859 if (!capable(CAP_SYS_ADMIN
)) {
860 if ((close_delay
!= acm
->port
.close_delay
) ||
861 (closing_wait
!= acm
->port
.closing_wait
))
864 retval
= -EOPNOTSUPP
;
866 acm
->port
.close_delay
= close_delay
;
867 acm
->port
.closing_wait
= closing_wait
;
870 mutex_unlock(&acm
->port
.mutex
);
874 static int wait_serial_change(struct acm
*acm
, unsigned long arg
)
877 DECLARE_WAITQUEUE(wait
, current
);
878 struct async_icount old
, new;
880 if (arg
& (TIOCM_DSR
| TIOCM_RI
| TIOCM_CD
))
883 spin_lock_irq(&acm
->read_lock
);
887 spin_unlock_irq(&acm
->read_lock
);
889 if ((arg
& TIOCM_DSR
) &&
892 if ((arg
& TIOCM_CD
) &&
895 if ((arg
& TIOCM_RI
) &&
899 add_wait_queue(&acm
->wioctl
, &wait
);
900 set_current_state(TASK_INTERRUPTIBLE
);
902 remove_wait_queue(&acm
->wioctl
, &wait
);
903 if (acm
->disconnected
) {
909 if (signal_pending(current
))
919 static int get_serial_usage(struct acm
*acm
,
920 struct serial_icounter_struct __user
*count
)
922 struct serial_icounter_struct icount
;
925 memset(&icount
, 0, sizeof(icount
));
926 icount
.dsr
= acm
->iocount
.dsr
;
927 icount
.rng
= acm
->iocount
.rng
;
928 icount
.dcd
= acm
->iocount
.dcd
;
929 icount
.frame
= acm
->iocount
.frame
;
930 icount
.overrun
= acm
->iocount
.overrun
;
931 icount
.parity
= acm
->iocount
.parity
;
932 icount
.brk
= acm
->iocount
.brk
;
934 if (copy_to_user(count
, &icount
, sizeof(icount
)) > 0)
940 static int acm_tty_ioctl(struct tty_struct
*tty
,
941 unsigned int cmd
, unsigned long arg
)
943 struct acm
*acm
= tty
->driver_data
;
944 int rv
= -ENOIOCTLCMD
;
947 case TIOCGSERIAL
: /* gets serial port data */
948 rv
= get_serial_info(acm
, (struct serial_struct __user
*) arg
);
951 rv
= set_serial_info(acm
, (struct serial_struct __user
*) arg
);
954 rv
= usb_autopm_get_interface(acm
->control
);
959 rv
= wait_serial_change(acm
, arg
);
960 usb_autopm_put_interface(acm
->control
);
963 rv
= get_serial_usage(acm
, (struct serial_icounter_struct __user
*) arg
);
970 static void acm_tty_set_termios(struct tty_struct
*tty
,
971 struct ktermios
*termios_old
)
973 struct acm
*acm
= tty
->driver_data
;
974 struct ktermios
*termios
= &tty
->termios
;
975 struct usb_cdc_line_coding newline
;
976 int newctrl
= acm
->ctrlout
;
978 newline
.dwDTERate
= cpu_to_le32(tty_get_baud_rate(tty
));
979 newline
.bCharFormat
= termios
->c_cflag
& CSTOPB
? 2 : 0;
980 newline
.bParityType
= termios
->c_cflag
& PARENB
?
981 (termios
->c_cflag
& PARODD
? 1 : 2) +
982 (termios
->c_cflag
& CMSPAR
? 2 : 0) : 0;
983 switch (termios
->c_cflag
& CSIZE
) {
985 newline
.bDataBits
= 5;
988 newline
.bDataBits
= 6;
991 newline
.bDataBits
= 7;
995 newline
.bDataBits
= 8;
998 /* FIXME: Needs to clear unsupported bits in the termios */
999 acm
->clocal
= ((termios
->c_cflag
& CLOCAL
) != 0);
1001 if (C_BAUD(tty
) == B0
) {
1002 newline
.dwDTERate
= acm
->line
.dwDTERate
;
1003 newctrl
&= ~ACM_CTRL_DTR
;
1004 } else if (termios_old
&& (termios_old
->c_cflag
& CBAUD
) == B0
) {
1005 newctrl
|= ACM_CTRL_DTR
;
1008 if (newctrl
!= acm
->ctrlout
)
1009 acm_set_control(acm
, acm
->ctrlout
= newctrl
);
1011 if (memcmp(&acm
->line
, &newline
, sizeof newline
)) {
1012 memcpy(&acm
->line
, &newline
, sizeof newline
);
1013 dev_dbg(&acm
->control
->dev
, "%s - set line: %d %d %d %d\n",
1015 le32_to_cpu(newline
.dwDTERate
),
1016 newline
.bCharFormat
, newline
.bParityType
,
1018 acm_set_line(acm
, &acm
->line
);
1022 static const struct tty_port_operations acm_port_ops
= {
1023 .dtr_rts
= acm_port_dtr_rts
,
1024 .shutdown
= acm_port_shutdown
,
1025 .activate
= acm_port_activate
,
1026 .destruct
= acm_port_destruct
,
1030 * USB probe and disconnect routines.
1033 /* Little helpers: write/read buffers free */
1034 static void acm_write_buffers_free(struct acm
*acm
)
1038 struct usb_device
*usb_dev
= interface_to_usbdev(acm
->control
);
1040 for (wb
= &acm
->wb
[0], i
= 0; i
< ACM_NW
; i
++, wb
++)
1041 usb_free_coherent(usb_dev
, acm
->writesize
, wb
->buf
, wb
->dmah
);
1044 static void acm_read_buffers_free(struct acm
*acm
)
1046 struct usb_device
*usb_dev
= interface_to_usbdev(acm
->control
);
1049 for (i
= 0; i
< acm
->rx_buflimit
; i
++)
1050 usb_free_coherent(usb_dev
, acm
->readsize
,
1051 acm
->read_buffers
[i
].base
, acm
->read_buffers
[i
].dma
);
1054 /* Little helper: write buffers allocate */
1055 static int acm_write_buffers_alloc(struct acm
*acm
)
1060 for (wb
= &acm
->wb
[0], i
= 0; i
< ACM_NW
; i
++, wb
++) {
1061 wb
->buf
= usb_alloc_coherent(acm
->dev
, acm
->writesize
, GFP_KERNEL
,
1067 usb_free_coherent(acm
->dev
, acm
->writesize
,
1076 static int acm_probe(struct usb_interface
*intf
,
1077 const struct usb_device_id
*id
)
1079 struct usb_cdc_union_desc
*union_header
= NULL
;
1080 struct usb_cdc_country_functional_desc
*cfd
= NULL
;
1081 unsigned char *buffer
= intf
->altsetting
->extra
;
1082 int buflen
= intf
->altsetting
->extralen
;
1083 struct usb_interface
*control_interface
;
1084 struct usb_interface
*data_interface
;
1085 struct usb_endpoint_descriptor
*epctrl
= NULL
;
1086 struct usb_endpoint_descriptor
*epread
= NULL
;
1087 struct usb_endpoint_descriptor
*epwrite
= NULL
;
1088 struct usb_device
*usb_dev
= interface_to_usbdev(intf
);
1091 int ctrlsize
, readsize
;
1093 u8 ac_management_function
= 0;
1094 u8 call_management_function
= 0;
1095 int call_interface_num
= -1;
1096 int data_interface_num
= -1;
1097 unsigned long quirks
;
1100 unsigned int elength
= 0;
1101 int combined_interfaces
= 0;
1102 struct device
*tty_dev
;
1106 quirks
= (unsigned long)id
->driver_info
;
1108 if (quirks
== IGNORE_DEVICE
)
1111 num_rx_buf
= (quirks
== SINGLE_RX_URB
) ? 1 : ACM_NR
;
1113 /* handle quirks deadly to normal probing*/
1114 if (quirks
== NO_UNION_NORMAL
) {
1115 data_interface
= usb_ifnum_to_if(usb_dev
, 1);
1116 control_interface
= usb_ifnum_to_if(usb_dev
, 0);
1117 goto skip_normal_probe
;
1122 dev_err(&intf
->dev
, "Weird descriptor references\n");
1127 if (intf
->cur_altsetting
->endpoint
&&
1128 intf
->cur_altsetting
->endpoint
->extralen
&&
1129 intf
->cur_altsetting
->endpoint
->extra
) {
1131 "Seeking extra descriptors on endpoint\n");
1132 buflen
= intf
->cur_altsetting
->endpoint
->extralen
;
1133 buffer
= intf
->cur_altsetting
->endpoint
->extra
;
1136 "Zero length descriptor references\n");
1141 while (buflen
> 0) {
1142 elength
= buffer
[0];
1144 dev_err(&intf
->dev
, "skipping garbage byte\n");
1148 if (buffer
[1] != USB_DT_CS_INTERFACE
) {
1149 dev_err(&intf
->dev
, "skipping garbage\n");
1153 switch (buffer
[2]) {
1154 case USB_CDC_UNION_TYPE
: /* we've found it */
1155 if (elength
< sizeof(struct usb_cdc_union_desc
))
1158 dev_err(&intf
->dev
, "More than one "
1159 "union descriptor, skipping ...\n");
1162 union_header
= (struct usb_cdc_union_desc
*)buffer
;
1164 case USB_CDC_COUNTRY_TYPE
: /* export through sysfs*/
1165 if (elength
< sizeof(struct usb_cdc_country_functional_desc
))
1167 cfd
= (struct usb_cdc_country_functional_desc
*)buffer
;
1169 case USB_CDC_HEADER_TYPE
: /* maybe check version */
1170 break; /* for now we ignore it */
1171 case USB_CDC_ACM_TYPE
:
1174 ac_management_function
= buffer
[3];
1176 case USB_CDC_CALL_MANAGEMENT_TYPE
:
1179 call_management_function
= buffer
[3];
1180 call_interface_num
= buffer
[4];
1184 * there are LOTS more CDC descriptors that
1185 * could legitimately be found here.
1187 dev_dbg(&intf
->dev
, "Ignoring descriptor: "
1188 "type %02x, length %ud\n",
1189 buffer
[2], elength
);
1197 if (!union_header
) {
1198 if (call_interface_num
> 0) {
1199 dev_dbg(&intf
->dev
, "No union descriptor, using call management descriptor\n");
1200 /* quirks for Droids MuIn LCD */
1201 if (quirks
& NO_DATA_INTERFACE
)
1202 data_interface
= usb_ifnum_to_if(usb_dev
, 0);
1204 data_interface
= usb_ifnum_to_if(usb_dev
, (data_interface_num
= call_interface_num
));
1205 control_interface
= intf
;
1207 if (intf
->cur_altsetting
->desc
.bNumEndpoints
!= 3) {
1208 dev_dbg(&intf
->dev
,"No union descriptor, giving up\n");
1211 dev_warn(&intf
->dev
,"No union descriptor, testing for castrated device\n");
1212 combined_interfaces
= 1;
1213 control_interface
= data_interface
= intf
;
1214 goto look_for_collapsed_interface
;
1218 control_interface
= usb_ifnum_to_if(usb_dev
, union_header
->bMasterInterface0
);
1219 data_interface
= usb_ifnum_to_if(usb_dev
, (data_interface_num
= union_header
->bSlaveInterface0
));
1222 if (!control_interface
|| !data_interface
) {
1223 dev_dbg(&intf
->dev
, "no interfaces\n");
1227 if (data_interface_num
!= call_interface_num
)
1228 dev_dbg(&intf
->dev
, "Separate call control interface. That is not fully supported.\n");
1230 if (control_interface
== data_interface
) {
1231 /* some broken devices designed for windows work this way */
1232 dev_warn(&intf
->dev
,"Control and data interfaces are not separated!\n");
1233 combined_interfaces
= 1;
1234 /* a popular other OS doesn't use it */
1235 quirks
|= NO_CAP_LINE
;
1236 if (data_interface
->cur_altsetting
->desc
.bNumEndpoints
!= 3) {
1237 dev_err(&intf
->dev
, "This needs exactly 3 endpoints\n");
1240 look_for_collapsed_interface
:
1241 for (i
= 0; i
< 3; i
++) {
1242 struct usb_endpoint_descriptor
*ep
;
1243 ep
= &data_interface
->cur_altsetting
->endpoint
[i
].desc
;
1245 if (usb_endpoint_is_int_in(ep
))
1247 else if (usb_endpoint_is_bulk_out(ep
))
1249 else if (usb_endpoint_is_bulk_in(ep
))
1254 if (!epctrl
|| !epread
|| !epwrite
)
1257 goto made_compressed_probe
;
1262 /*workaround for switched interfaces */
1263 if (data_interface
->cur_altsetting
->desc
.bInterfaceClass
1264 != CDC_DATA_INTERFACE_TYPE
) {
1265 if (control_interface
->cur_altsetting
->desc
.bInterfaceClass
1266 == CDC_DATA_INTERFACE_TYPE
) {
1268 "Your device has switched interfaces.\n");
1269 swap(control_interface
, data_interface
);
1275 /* Accept probe requests only for the control interface */
1276 if (!combined_interfaces
&& intf
!= control_interface
)
1279 if (!combined_interfaces
&& usb_interface_claimed(data_interface
)) {
1280 /* valid in this context */
1281 dev_dbg(&intf
->dev
, "The data interface isn't available\n");
1286 if (data_interface
->cur_altsetting
->desc
.bNumEndpoints
< 2 ||
1287 control_interface
->cur_altsetting
->desc
.bNumEndpoints
== 0)
1290 epctrl
= &control_interface
->cur_altsetting
->endpoint
[0].desc
;
1291 epread
= &data_interface
->cur_altsetting
->endpoint
[0].desc
;
1292 epwrite
= &data_interface
->cur_altsetting
->endpoint
[1].desc
;
1295 /* workaround for switched endpoints */
1296 if (!usb_endpoint_dir_in(epread
)) {
1297 /* descriptors are swapped */
1299 "The data interface has switched endpoints\n");
1300 swap(epread
, epwrite
);
1302 made_compressed_probe
:
1303 dev_dbg(&intf
->dev
, "interfaces are valid\n");
1305 acm
= kzalloc(sizeof(struct acm
), GFP_KERNEL
);
1309 minor
= acm_alloc_minor(acm
);
1311 dev_err(&intf
->dev
, "no more free acm devices\n");
1316 ctrlsize
= usb_endpoint_maxp(epctrl
);
1317 readsize
= usb_endpoint_maxp(epread
) *
1318 (quirks
== SINGLE_RX_URB
? 1 : 2);
1319 acm
->combined_interfaces
= combined_interfaces
;
1320 acm
->writesize
= usb_endpoint_maxp(epwrite
) * 20;
1321 acm
->control
= control_interface
;
1322 acm
->data
= data_interface
;
1325 acm
->ctrl_caps
= ac_management_function
;
1326 if (quirks
& NO_CAP_LINE
)
1327 acm
->ctrl_caps
&= ~USB_CDC_CAP_LINE
;
1328 acm
->ctrlsize
= ctrlsize
;
1329 acm
->readsize
= readsize
;
1330 acm
->rx_buflimit
= num_rx_buf
;
1331 INIT_WORK(&acm
->work
, acm_softint
);
1332 init_waitqueue_head(&acm
->wioctl
);
1333 spin_lock_init(&acm
->write_lock
);
1334 spin_lock_init(&acm
->read_lock
);
1335 mutex_init(&acm
->mutex
);
1336 acm
->rx_endpoint
= usb_rcvbulkpipe(usb_dev
, epread
->bEndpointAddress
);
1337 acm
->is_int_ep
= usb_endpoint_xfer_int(epread
);
1339 acm
->bInterval
= epread
->bInterval
;
1340 tty_port_init(&acm
->port
);
1341 acm
->port
.ops
= &acm_port_ops
;
1342 init_usb_anchor(&acm
->delayed
);
1343 acm
->quirks
= quirks
;
1345 buf
= usb_alloc_coherent(usb_dev
, ctrlsize
, GFP_KERNEL
, &acm
->ctrl_dma
);
1348 acm
->ctrl_buffer
= buf
;
1350 if (acm_write_buffers_alloc(acm
) < 0)
1353 acm
->ctrlurb
= usb_alloc_urb(0, GFP_KERNEL
);
1357 for (i
= 0; i
< num_rx_buf
; i
++) {
1358 struct acm_rb
*rb
= &(acm
->read_buffers
[i
]);
1361 rb
->base
= usb_alloc_coherent(acm
->dev
, readsize
, GFP_KERNEL
,
1368 urb
= usb_alloc_urb(0, GFP_KERNEL
);
1372 urb
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
1373 urb
->transfer_dma
= rb
->dma
;
1374 if (acm
->is_int_ep
) {
1375 usb_fill_int_urb(urb
, acm
->dev
,
1379 acm_read_bulk_callback
, rb
,
1382 usb_fill_bulk_urb(urb
, acm
->dev
,
1386 acm_read_bulk_callback
, rb
);
1389 acm
->read_urbs
[i
] = urb
;
1390 __set_bit(i
, &acm
->read_urbs_free
);
1392 for (i
= 0; i
< ACM_NW
; i
++) {
1393 struct acm_wb
*snd
= &(acm
->wb
[i
]);
1395 snd
->urb
= usb_alloc_urb(0, GFP_KERNEL
);
1396 if (snd
->urb
== NULL
)
1399 if (usb_endpoint_xfer_int(epwrite
))
1400 usb_fill_int_urb(snd
->urb
, usb_dev
,
1401 usb_sndintpipe(usb_dev
, epwrite
->bEndpointAddress
),
1402 NULL
, acm
->writesize
, acm_write_bulk
, snd
, epwrite
->bInterval
);
1404 usb_fill_bulk_urb(snd
->urb
, usb_dev
,
1405 usb_sndbulkpipe(usb_dev
, epwrite
->bEndpointAddress
),
1406 NULL
, acm
->writesize
, acm_write_bulk
, snd
);
1407 snd
->urb
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
1408 if (quirks
& SEND_ZERO_PACKET
)
1409 snd
->urb
->transfer_flags
|= URB_ZERO_PACKET
;
1410 snd
->instance
= acm
;
1413 usb_set_intfdata(intf
, acm
);
1415 i
= device_create_file(&intf
->dev
, &dev_attr_bmCapabilities
);
1419 if (cfd
) { /* export the country data */
1420 acm
->country_codes
= kmalloc(cfd
->bLength
- 4, GFP_KERNEL
);
1421 if (!acm
->country_codes
)
1422 goto skip_countries
;
1423 acm
->country_code_size
= cfd
->bLength
- 4;
1424 memcpy(acm
->country_codes
, (u8
*)&cfd
->wCountyCode0
,
1426 acm
->country_rel_date
= cfd
->iCountryCodeRelDate
;
1428 i
= device_create_file(&intf
->dev
, &dev_attr_wCountryCodes
);
1430 kfree(acm
->country_codes
);
1431 acm
->country_codes
= NULL
;
1432 acm
->country_code_size
= 0;
1433 goto skip_countries
;
1436 i
= device_create_file(&intf
->dev
,
1437 &dev_attr_iCountryCodeRelDate
);
1439 device_remove_file(&intf
->dev
, &dev_attr_wCountryCodes
);
1440 kfree(acm
->country_codes
);
1441 acm
->country_codes
= NULL
;
1442 acm
->country_code_size
= 0;
1443 goto skip_countries
;
1448 usb_fill_int_urb(acm
->ctrlurb
, usb_dev
,
1449 usb_rcvintpipe(usb_dev
, epctrl
->bEndpointAddress
),
1450 acm
->ctrl_buffer
, ctrlsize
, acm_ctrl_irq
, acm
,
1451 /* works around buggy devices */
1452 epctrl
->bInterval
? epctrl
->bInterval
: 16);
1453 acm
->ctrlurb
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
1454 acm
->ctrlurb
->transfer_dma
= acm
->ctrl_dma
;
1456 dev_info(&intf
->dev
, "ttyACM%d: USB ACM device\n", minor
);
1458 acm
->line
.dwDTERate
= cpu_to_le32(9600);
1459 acm
->line
.bDataBits
= 8;
1460 acm_set_line(acm
, &acm
->line
);
1462 usb_driver_claim_interface(&acm_driver
, data_interface
, acm
);
1463 usb_set_intfdata(data_interface
, acm
);
1465 usb_get_intf(control_interface
);
1466 tty_dev
= tty_port_register_device(&acm
->port
, acm_tty_driver
, minor
,
1467 &control_interface
->dev
);
1468 if (IS_ERR(tty_dev
)) {
1469 rv
= PTR_ERR(tty_dev
);
1473 if (quirks
& CLEAR_HALT_CONDITIONS
) {
1474 usb_clear_halt(usb_dev
, usb_rcvbulkpipe(usb_dev
, epread
->bEndpointAddress
));
1475 usb_clear_halt(usb_dev
, usb_sndbulkpipe(usb_dev
, epwrite
->bEndpointAddress
));
1480 if (acm
->country_codes
) {
1481 device_remove_file(&acm
->control
->dev
,
1482 &dev_attr_wCountryCodes
);
1483 device_remove_file(&acm
->control
->dev
,
1484 &dev_attr_iCountryCodeRelDate
);
1485 kfree(acm
->country_codes
);
1487 device_remove_file(&acm
->control
->dev
, &dev_attr_bmCapabilities
);
1489 usb_set_intfdata(intf
, NULL
);
1490 for (i
= 0; i
< ACM_NW
; i
++)
1491 usb_free_urb(acm
->wb
[i
].urb
);
1493 for (i
= 0; i
< num_rx_buf
; i
++)
1494 usb_free_urb(acm
->read_urbs
[i
]);
1495 acm_read_buffers_free(acm
);
1496 usb_free_urb(acm
->ctrlurb
);
1498 acm_write_buffers_free(acm
);
1500 usb_free_coherent(usb_dev
, ctrlsize
, acm
->ctrl_buffer
, acm
->ctrl_dma
);
1502 acm_release_minor(acm
);
1508 static void stop_data_traffic(struct acm
*acm
)
1512 dev_dbg(&acm
->control
->dev
, "%s\n", __func__
);
1514 usb_kill_urb(acm
->ctrlurb
);
1515 for (i
= 0; i
< ACM_NW
; i
++)
1516 usb_kill_urb(acm
->wb
[i
].urb
);
1517 for (i
= 0; i
< acm
->rx_buflimit
; i
++)
1518 usb_kill_urb(acm
->read_urbs
[i
]);
1520 cancel_work_sync(&acm
->work
);
1523 static void acm_disconnect(struct usb_interface
*intf
)
1525 struct acm
*acm
= usb_get_intfdata(intf
);
1526 struct usb_device
*usb_dev
= interface_to_usbdev(intf
);
1527 struct tty_struct
*tty
;
1530 dev_dbg(&intf
->dev
, "%s\n", __func__
);
1532 /* sibling interface is already cleaning up */
1536 mutex_lock(&acm
->mutex
);
1537 acm
->disconnected
= true;
1538 if (acm
->country_codes
) {
1539 device_remove_file(&acm
->control
->dev
,
1540 &dev_attr_wCountryCodes
);
1541 device_remove_file(&acm
->control
->dev
,
1542 &dev_attr_iCountryCodeRelDate
);
1544 wake_up_all(&acm
->wioctl
);
1545 device_remove_file(&acm
->control
->dev
, &dev_attr_bmCapabilities
);
1546 usb_set_intfdata(acm
->control
, NULL
);
1547 usb_set_intfdata(acm
->data
, NULL
);
1548 mutex_unlock(&acm
->mutex
);
1550 tty
= tty_port_tty_get(&acm
->port
);
1556 stop_data_traffic(acm
);
1558 tty_unregister_device(acm_tty_driver
, acm
->minor
);
1560 usb_free_urb(acm
->ctrlurb
);
1561 for (i
= 0; i
< ACM_NW
; i
++)
1562 usb_free_urb(acm
->wb
[i
].urb
);
1563 for (i
= 0; i
< acm
->rx_buflimit
; i
++)
1564 usb_free_urb(acm
->read_urbs
[i
]);
1565 acm_write_buffers_free(acm
);
1566 usb_free_coherent(usb_dev
, acm
->ctrlsize
, acm
->ctrl_buffer
, acm
->ctrl_dma
);
1567 acm_read_buffers_free(acm
);
1569 if (!acm
->combined_interfaces
)
1570 usb_driver_release_interface(&acm_driver
, intf
== acm
->control
?
1571 acm
->data
: acm
->control
);
1573 tty_port_put(&acm
->port
);
1577 static int acm_suspend(struct usb_interface
*intf
, pm_message_t message
)
1579 struct acm
*acm
= usb_get_intfdata(intf
);
1582 spin_lock_irq(&acm
->write_lock
);
1583 if (PMSG_IS_AUTO(message
)) {
1584 if (acm
->transmitting
) {
1585 spin_unlock_irq(&acm
->write_lock
);
1589 cnt
= acm
->susp_count
++;
1590 spin_unlock_irq(&acm
->write_lock
);
1595 stop_data_traffic(acm
);
1600 static int acm_resume(struct usb_interface
*intf
)
1602 struct acm
*acm
= usb_get_intfdata(intf
);
1606 spin_lock_irq(&acm
->write_lock
);
1608 if (--acm
->susp_count
)
1611 if (test_bit(ASYNCB_INITIALIZED
, &acm
->port
.flags
)) {
1612 rv
= usb_submit_urb(acm
->ctrlurb
, GFP_ATOMIC
);
1615 urb
= usb_get_from_anchor(&acm
->delayed
);
1619 acm_start_wb(acm
, urb
->context
);
1623 * delayed error checking because we must
1624 * do the write path at all cost
1629 rv
= acm_submit_read_urbs(acm
, GFP_ATOMIC
);
1632 spin_unlock_irq(&acm
->write_lock
);
1637 static int acm_reset_resume(struct usb_interface
*intf
)
1639 struct acm
*acm
= usb_get_intfdata(intf
);
1641 if (test_bit(ASYNCB_INITIALIZED
, &acm
->port
.flags
))
1642 tty_port_tty_hangup(&acm
->port
, false);
1644 return acm_resume(intf
);
1647 #endif /* CONFIG_PM */
1649 #define NOKIA_PCSUITE_ACM_INFO(x) \
1650 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1651 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1652 USB_CDC_ACM_PROTO_VENDOR)
1654 #define SAMSUNG_PCSUITE_ACM_INFO(x) \
1655 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1656 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1657 USB_CDC_ACM_PROTO_VENDOR)
1660 * USB driver structure.
1663 static const struct usb_device_id acm_ids
[] = {
1664 /* quirky and broken devices */
1665 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1666 .driver_info
= NO_UNION_NORMAL
, },/* has no union descriptor */
1667 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1668 .driver_info
= NO_UNION_NORMAL
, },/* has no union descriptor */
1669 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1670 .driver_info
= NO_UNION_NORMAL
, /* has no union descriptor */
1672 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1673 .driver_info
= NO_UNION_NORMAL
, /* has no union descriptor */
1675 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1676 .driver_info
= NO_UNION_NORMAL
, /* has no union descriptor */
1678 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1679 .driver_info
= NO_UNION_NORMAL
, /* has no union descriptor */
1681 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1682 .driver_info
= NO_UNION_NORMAL
, /* has no union descriptor */
1684 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1685 .driver_info
= SINGLE_RX_URB
,
1687 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1688 .driver_info
= SINGLE_RX_URB
, /* firmware bug */
1690 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1691 .driver_info
= SINGLE_RX_URB
, /* firmware bug */
1693 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1694 .driver_info
= NO_UNION_NORMAL
, /* has no union descriptor */
1696 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1697 .driver_info
= NO_UNION_NORMAL
, /* has no union descriptor */
1699 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1700 .driver_info
= NO_UNION_NORMAL
, /* has no union descriptor */
1702 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1703 .driver_info
= NO_UNION_NORMAL
, /* has no union descriptor */
1705 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1706 .driver_info
= NO_UNION_NORMAL
, /* has no union descriptor */
1708 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1709 .driver_info
= QUIRK_CONTROL_LINE_STATE
, },
1710 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
1711 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1713 /* Motorola H24 HSPA module: */
1714 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1715 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1716 .driver_info
= NO_UNION_NORMAL
, /* handle only modem interface */
1718 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1719 .driver_info
= NO_UNION_NORMAL
, /* handle only modem interface */
1721 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1722 .driver_info
= NO_UNION_NORMAL
, /* handle only modem interface */
1724 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1725 .driver_info
= NO_UNION_NORMAL
, /* handle only modem interface */
1727 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1728 .driver_info
= NO_UNION_NORMAL
, /* handle only modem interface */
1730 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1731 .driver_info
= NO_UNION_NORMAL
, /* handle only modem interface */
1733 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1734 .driver_info
= NO_UNION_NORMAL
, /* handle only modem interface */
1737 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1738 .driver_info
= NO_UNION_NORMAL
, /* union descriptor misplaced on
1739 data interface instead of
1740 communications interface.
1741 Maybe we should define a new
1744 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1745 .driver_info
= NO_UNION_NORMAL
,
1747 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1748 .driver_info
= NO_UNION_NORMAL
,
1750 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1751 .driver_info
= NO_UNION_NORMAL
, /* reports zero length descriptor */
1753 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1754 .driver_info
= NO_UNION_NORMAL
, /* reports zero length descriptor */
1757 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1758 .driver_info
= CLEAR_HALT_CONDITIONS
,
1761 /* Nokia S60 phones expose two ACM channels. The first is
1762 * a modem and is picked up by the standard AT-command
1763 * information below. The second is 'vendor-specific' but
1764 * is treated as a serial device at the S60 end, so we want
1765 * to expose it on Linux too. */
1766 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1767 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1768 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1769 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1770 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1771 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1772 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1773 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1774 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1775 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1776 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1777 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1778 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1779 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1780 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1781 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1782 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1783 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1784 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1785 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1786 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1787 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1788 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1789 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1790 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1791 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1792 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1793 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1794 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1795 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1796 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1797 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1798 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1799 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1800 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1801 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1802 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1803 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1804 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1805 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1806 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1807 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1808 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1809 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1810 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1811 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1812 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1813 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1814 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1815 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1816 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1817 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1818 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1819 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1820 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1821 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1822 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1823 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1825 /* Support for Owen devices */
1826 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1828 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1830 /* Support for Droids MuIn LCD */
1831 { USB_DEVICE(0x04d8, 0x000b),
1832 .driver_info
= NO_DATA_INTERFACE
,
1835 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1836 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1837 .driver_info
= IGNORE_DEVICE
,
1839 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1840 .driver_info
= IGNORE_DEVICE
,
1844 /*Samsung phone in firmware update mode */
1845 { USB_DEVICE(0x04e8, 0x685d),
1846 .driver_info
= IGNORE_DEVICE
,
1849 /* Exclude Infineon Flash Loader utility */
1850 { USB_DEVICE(0x058b, 0x0041),
1851 .driver_info
= IGNORE_DEVICE
,
1854 /* control interfaces without any protocol set */
1855 { USB_INTERFACE_INFO(USB_CLASS_COMM
, USB_CDC_SUBCLASS_ACM
,
1856 USB_CDC_PROTO_NONE
) },
1858 /* control interfaces with various AT-command sets */
1859 { USB_INTERFACE_INFO(USB_CLASS_COMM
, USB_CDC_SUBCLASS_ACM
,
1860 USB_CDC_ACM_PROTO_AT_V25TER
) },
1861 { USB_INTERFACE_INFO(USB_CLASS_COMM
, USB_CDC_SUBCLASS_ACM
,
1862 USB_CDC_ACM_PROTO_AT_PCCA101
) },
1863 { USB_INTERFACE_INFO(USB_CLASS_COMM
, USB_CDC_SUBCLASS_ACM
,
1864 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE
) },
1865 { USB_INTERFACE_INFO(USB_CLASS_COMM
, USB_CDC_SUBCLASS_ACM
,
1866 USB_CDC_ACM_PROTO_AT_GSM
) },
1867 { USB_INTERFACE_INFO(USB_CLASS_COMM
, USB_CDC_SUBCLASS_ACM
,
1868 USB_CDC_ACM_PROTO_AT_3G
) },
1869 { USB_INTERFACE_INFO(USB_CLASS_COMM
, USB_CDC_SUBCLASS_ACM
,
1870 USB_CDC_ACM_PROTO_AT_CDMA
) },
1872 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
1873 .driver_info
= SEND_ZERO_PACKET
,
1879 MODULE_DEVICE_TABLE(usb
, acm_ids
);
1881 static struct usb_driver acm_driver
= {
1884 .disconnect
= acm_disconnect
,
1886 .suspend
= acm_suspend
,
1887 .resume
= acm_resume
,
1888 .reset_resume
= acm_reset_resume
,
1890 .id_table
= acm_ids
,
1892 .supports_autosuspend
= 1,
1894 .disable_hub_initiated_lpm
= 1,
1898 * TTY driver structures.
1901 static const struct tty_operations acm_ops
= {
1902 .install
= acm_tty_install
,
1903 .open
= acm_tty_open
,
1904 .close
= acm_tty_close
,
1905 .cleanup
= acm_tty_cleanup
,
1906 .hangup
= acm_tty_hangup
,
1907 .write
= acm_tty_write
,
1908 .write_room
= acm_tty_write_room
,
1909 .ioctl
= acm_tty_ioctl
,
1910 .throttle
= acm_tty_throttle
,
1911 .unthrottle
= acm_tty_unthrottle
,
1912 .chars_in_buffer
= acm_tty_chars_in_buffer
,
1913 .break_ctl
= acm_tty_break_ctl
,
1914 .set_termios
= acm_tty_set_termios
,
1915 .tiocmget
= acm_tty_tiocmget
,
1916 .tiocmset
= acm_tty_tiocmset
,
1923 static int __init
acm_init(void)
1926 acm_tty_driver
= alloc_tty_driver(ACM_TTY_MINORS
);
1927 if (!acm_tty_driver
)
1929 acm_tty_driver
->driver_name
= "acm",
1930 acm_tty_driver
->name
= "ttyACM",
1931 acm_tty_driver
->major
= ACM_TTY_MAJOR
,
1932 acm_tty_driver
->minor_start
= 0,
1933 acm_tty_driver
->type
= TTY_DRIVER_TYPE_SERIAL
,
1934 acm_tty_driver
->subtype
= SERIAL_TYPE_NORMAL
,
1935 acm_tty_driver
->flags
= TTY_DRIVER_REAL_RAW
| TTY_DRIVER_DYNAMIC_DEV
;
1936 acm_tty_driver
->init_termios
= tty_std_termios
;
1937 acm_tty_driver
->init_termios
.c_cflag
= B9600
| CS8
| CREAD
|
1939 tty_set_operations(acm_tty_driver
, &acm_ops
);
1941 retval
= tty_register_driver(acm_tty_driver
);
1943 put_tty_driver(acm_tty_driver
);
1947 retval
= usb_register(&acm_driver
);
1949 tty_unregister_driver(acm_tty_driver
);
1950 put_tty_driver(acm_tty_driver
);
1954 printk(KERN_INFO KBUILD_MODNAME
": " DRIVER_DESC
"\n");
1959 static void __exit
acm_exit(void)
1961 usb_deregister(&acm_driver
);
1962 tty_unregister_driver(acm_tty_driver
);
1963 put_tty_driver(acm_tty_driver
);
1964 idr_destroy(&acm_minors
);
1967 module_init(acm_init
);
1968 module_exit(acm_exit
);
1970 MODULE_AUTHOR(DRIVER_AUTHOR
);
1971 MODULE_DESCRIPTION(DRIVER_DESC
);
1972 MODULE_LICENSE("GPL");
1973 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR
);