Linux Cdc Acm Driver

| 19-05-2021
[RAND-1-100] Comments

The MP gives a clear picture of catastrophic failures in your mission critical machines, trend-based alerts of significant changes to computer groups, in-depth views of health of individual machines, and reports that provide a landscape view of the health of all monitored clients. Windows 10 system image manager.

  • Linux host drivers ¶ Since the gadget uses standard composite framework and appears as such to Linux host it does not need any additional drivers on Linux host side. Similarly, file:linux-cdc-acm.inf is provided for CDC ACM. Customising the gadget.
  • Credits¶ Credits for the Simple Linux USB Driver: The following people have contributed to this code (in alphabetical order by last name). I'm sure this list should be longer, its difficult to maintain, add yourself with a patch if desired.

Using a USB CDC Device in Linux. When using a USB device that implements the CDC communication protocol with Linux, the device is recognizable and Linux will be able to receive data from it with any modification. It is not a modem. Cdcacm 7-1:1.0: ttyACM0: USB ACM device If detected correctly, the USB device should be connected as a ttyACM.

USB communications device class (or USB CDC class) is a composite Universal Serial Busdevice class.

Ok i got mine working, hope this helps others. Ea games command and conquer generals zero hour free download. Very frustrated with ea & origin at the mome3nt. 3 days worth of headache.kind of surprised ea didnt do this as a patch. My fix was a combination of previous ideas with 1 twist.step one: i repurchased the entire command and conquer games series through Origin to get around the no disc problemstep two: i went into the options file in both the command and conquer generals and zero hour folders and edited the resolution value to 1920 1080 and saved themstep three: dont mess with resolution value in game under options or you will have to repeat step 2 to be able to play againfix should work on any game in the series where the stock video option was showing invalid option and has an options file under documents. I like this game enough im willing to buy it AGAIN if i know it will work, im not buying a game i already paid for to see if it might work.

The communications device class is used for computer networking devices akin to a network card, providing an interface for transmitting Ethernet or ATM frames onto some physical media. It is also used for modems, ISDN, fax machines, and telephony applications for performing regular voice calls.

Cdc acm driver download

Microsoft Windows versions prior to Windows Vista do not work with the networking parts of the USB CDC, instead using Microsoft's own derivative named Microsoft RNDIS, a serialized version of the Microsoft NDIS (Network Driver Interface Specification). With a vendor-supplied INF file, Windows Vista works with USB CDC and USB WMCDC devices.[1]

Linux Cdc Acm Driver

This class can be used for industrial equipment such as CNC machinery to allow upgrading from older RS-232 serial controllers and robotics, since they can keep software compatibility. The device attaches to an RS-232 communications line and the operating system on the USB side makes the USB device appear as a traditional RS-232 port. Chip manufacturers such as Prolific Technology, FTDI, Microchip, and Atmel provide facilities for developing USB RS-232 devices.

Devices of this class are also implemented in embedded systems such as mobile phones so that a phone may be used as a modem, fax or network port. Gta san andreas game download for windows 7. The data interfaces are generally used to perform bulk data transfer.

Linux Cdc Acm Driver Update

References[edit]

  1. ^Support for the Wireless Mobile Communication Device Class

External links[edit]

  • USB-IF's Approved Class Specification Documents
    • Class definitions for Communication Devices 1.2 (.zip file format, size 3.43 MB)
  • App Note, Migrating from RS-232 to USB Bridge Specification. Explains the use of USB CDC (Communications Device Class) ACM (Abstract Control Model) to emulate serial ports over USB.
Retrieved from 'https://en.wikipedia.org/w/index.php?title=USB_communications_device_class&oldid=903916486'
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Linux Cdc Acm Driver Download

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oneukumusb: cdc-acm: make sure a refcount is taken early enoughc52873eAug 15, 2019
111 contributors
// SPDX-License-Identifier: GPL-2.0+
/*
* cdc-acm.c
*
* Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de>
* Copyright (c) 1999 Pavel Machek <pavel@ucw.cz>
* Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com>
* Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz>
* Copyright (c) 2004 Oliver Neukum <oliver@neukum.name>
* Copyright (c) 2005 David Kubicek <dave@awk.cz>
* Copyright (c) 2011 Johan Hovold <jhovold@gmail.com>
*
* USB Abstract Control Model driver for USB modems and ISDN adapters
*
* Sponsored by SuSE
*/
#undef DEBUG
#undef VERBOSE_DEBUG
#include<linux/kernel.h>
#include<linux/sched/signal.h>
#include<linux/errno.h>
#include<linux/init.h>
#include<linux/slab.h>
#include<linux/log2.h>
#include<linux/tty.h>
#include<linux/serial.h>
#include<linux/tty_driver.h>
#include<linux/tty_flip.h>
#include<linux/module.h>
#include<linux/mutex.h>
#include<linux/uaccess.h>
#include<linux/usb.h>
#include<linux/usb/cdc.h>
#include<asm/byteorder.h>
#include<asm/unaligned.h>
#include<linux/idr.h>
#include<linux/list.h>
#include'cdc-acm.h'
#defineDRIVER_AUTHOR'Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold'
#defineDRIVER_DESC'USB Abstract Control Model driver for USB modems and ISDN adapters'
staticstruct usb_driver acm_driver;
staticstruct tty_driver *acm_tty_driver;
staticDEFINE_IDR(acm_minors);
staticDEFINE_MUTEX(acm_minors_lock);
staticvoidacm_tty_set_termios(struct tty_struct *tty,
struct ktermios *termios_old);
/*
* acm_minors accessors
*/
/*
* Look up an ACM structure by minor. If found and not disconnected, increment
* its refcount and return it with its mutex held.
*/
staticstruct acm *acm_get_by_minor(unsignedint minor)
{
struct acm *acm;
mutex_lock(&acm_minors_lock);
acm = idr_find(&acm_minors, minor);
if (acm) {
mutex_lock(&acm->mutex);
if (acm->disconnected) {
mutex_unlock(&acm->mutex);
acm = NULL;
} else {
tty_port_get(&acm->port);
mutex_unlock(&acm->mutex);
}
}
mutex_unlock(&acm_minors_lock);
return acm;
}
/*
* Try to find an available minor number and if found, associate it with 'acm'.
*/
staticintacm_alloc_minor(struct acm *acm)
{
intminor;
mutex_lock(&acm_minors_lock);
minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL);
mutex_unlock(&acm_minors_lock);
returnminor;
}
/* Release the minor number associated with 'acm'. */
staticvoidacm_release_minor(struct acm *acm)
{
mutex_lock(&acm_minors_lock);
idr_remove(&acm_minors, acm->minor);
mutex_unlock(&acm_minors_lock);
}
/*
* Functions for ACM control messages.
*/
staticintacm_ctrl_msg(struct acm *acm, int request, int value,
void *buf, int len)
{
int retval;
retval = usb_autopm_get_interface(acm->control);
if (retval)
return retval;
retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
request, USB_RT_ACM, value,
acm->control->altsetting[0].desc.bInterfaceNumber,
buf, len, 5000);
dev_dbg(&acm->control->dev,
'%s - rq 0x%02x, val %#x, len %#x, result %dn',
__func__, request, value, len, retval);
usb_autopm_put_interface(acm->control);
return retval < 0 ? retval : 0;
}
/* devices aren't required to support these requests.
* the cdc acm descriptor tells whether they do..
*/
staticinlineintacm_set_control(struct acm *acm, int control)
{
if (acm->quirks & QUIRK_CONTROL_LINE_STATE)
return -EOPNOTSUPP;
returnacm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE,
control, NULL, 0);
}
#defineacm_set_line(acm, line)
acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
#defineacm_send_break(acm, ms)
acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
static void acm_kill_urbs(struct acm *acm)
{
int i;
usb_kill_urb(acm->ctrlurb);
for (i = 0; i < ACM_NW; i++)
usb_kill_urb(acm->wb[i].urb);
for (i = 0; i < acm->rx_buflimit; i++)
usb_kill_urb(acm->read_urbs[i]);
}
/*
* Write buffer management.
* All of these assume proper locks taken by the caller.
*/
staticintacm_wb_alloc(struct acm *acm)
{
int i, wbn;
struct acm_wb *wb;
wbn = 0;
i = 0;
for (;;) {
wb = &acm->wb[wbn];
if (!wb->use) {
wb->use = 1;
wb->len = 0;
return wbn;
}
wbn = (wbn + 1) % ACM_NW;
if (++i >= ACM_NW)
return -1;
}
}
staticintacm_wb_is_avail(struct acm *acm)
{
int i, n;
unsignedlong flags;
n = ACM_NW;
spin_lock_irqsave(&acm->write_lock, flags);
for (i = 0; i < ACM_NW; i++)
n -= acm->wb[i].use;
spin_unlock_irqrestore(&acm->write_lock, flags);
return n;
}
/*
* Finish write. Caller must hold acm->write_lock
*/
staticvoidacm_write_done(struct acm *acm, struct acm_wb *wb)
{
wb->use = 0;
acm->transmitting--;
usb_autopm_put_interface_async(acm->control);
}
/*
* Poke write.
*
* the caller is responsible for locking
*/
staticintacm_start_wb(struct acm *acm, struct acm_wb *wb)
{
int rc;
acm->transmitting++;
wb->urb->transfer_buffer = wb->buf;
wb->urb->transfer_dma = wb->dmah;
wb->urb->transfer_buffer_length = wb->len;
wb->urb->dev = acm->dev;
rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
if (rc < 0) {
dev_err(&acm->data->dev,
'%s - usb_submit_urb(write bulk) failed: %dn',
__func__, rc);
acm_write_done(acm, wb);
}
return rc;
}
/*
* attributes exported through sysfs
*/
staticssize_t bmCapabilities_show
(struct device *dev, struct device_attribute *attr, char *buf)
{
struct usb_interface *intf = to_usb_interface(dev);
struct acm *acm = usb_get_intfdata(intf);
returnsprintf(buf, '%d', acm->ctrl_caps);
}
staticDEVICE_ATTR_RO(bmCapabilities);
staticssize_t wCountryCodes_show
(struct device *dev, struct device_attribute *attr, char *buf)
{
struct usb_interface *intf = to_usb_interface(dev);
struct acm *acm = usb_get_intfdata(intf);
memcpy(buf, acm->country_codes, acm->country_code_size);
return acm->country_code_size;
}
staticDEVICE_ATTR_RO(wCountryCodes);
staticssize_t iCountryCodeRelDate_show
(struct device *dev, struct device_attribute *attr, char *buf)
{
struct usb_interface *intf = to_usb_interface(dev);
struct acm *acm = usb_get_intfdata(intf);
returnsprintf(buf, '%d', acm->country_rel_date);
}
staticDEVICE_ATTR_RO(iCountryCodeRelDate);
/*
* Interrupt handlers for various ACM device responses
*/
staticvoidacm_process_notification(struct acm *acm, unsignedchar *buf)
{
int newctrl;
int difference;
unsignedlong flags;
struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf;
unsignedchar *data = buf + sizeof(struct usb_cdc_notification);
switch (dr->bNotificationType) {
case USB_CDC_NOTIFY_NETWORK_CONNECTION:
dev_dbg(&acm->control->dev,
'%s - network connection: %dn', __func__, dr->wValue);
break;
case USB_CDC_NOTIFY_SERIAL_STATE:
if (le16_to_cpu(dr->wLength) != 2) {
dev_dbg(&acm->control->dev,
'%s - malformed serial staten', __func__);
break;
}
newctrl = get_unaligned_le16(data);
dev_dbg(&acm->control->dev,
'%s - serial state: 0x%xn', __func__, newctrl);
if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
dev_dbg(&acm->control->dev,
'%s - calling hangupn', __func__);
tty_port_tty_hangup(&acm->port, false);
}
difference = acm->ctrlin ^ newctrl;
spin_lock_irqsave(&acm->read_lock, flags);
acm->ctrlin = newctrl;
acm->oldcount = acm->iocount;
if (difference & ACM_CTRL_DSR)
acm->iocount.dsr++;
if (difference & ACM_CTRL_DCD)
acm->iocount.dcd++;
if (newctrl & ACM_CTRL_BRK)
acm->iocount.brk++;
if (newctrl & ACM_CTRL_RI)
acm->iocount.rng++;
if (newctrl & ACM_CTRL_FRAMING)
acm->iocount.frame++;
if (newctrl & ACM_CTRL_PARITY)
acm->iocount.parity++;
if (newctrl & ACM_CTRL_OVERRUN)
acm->iocount.overrun++;
spin_unlock_irqrestore(&acm->read_lock, flags);
if (difference)
wake_up_all(&acm->wioctl);
break;
default:
dev_dbg(&acm->control->dev,
'%s - unknown notification %d received: index %d len %dn',
__func__,
dr->bNotificationType, dr->wIndex, dr->wLength);
}
}
/* control interface reports status changes with 'interrupt' transfers */
staticvoidacm_ctrl_irq(struct urb *urb)
{
struct acm *acm = urb->context;
struct usb_cdc_notification *dr = urb->transfer_buffer;
unsignedint current_size = urb->actual_length;
unsignedint expected_size, copy_size, alloc_size;
int retval;
int status = urb->status;
switch (status) {
case0:
/* success */
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
/* this urb is terminated, clean up */
dev_dbg(&acm->control->dev,
'%s - urb shutting down with status: %dn',
__func__, status);
return;
default:
dev_dbg(&acm->control->dev,
'%s - nonzero urb status received: %dn',
__func__, status);
gotoexit;
}
usb_mark_last_busy(acm->dev);
if (acm->nb_index)
dr = (struct usb_cdc_notification *)acm->notification_buffer;
/* size = notification-header + (optional) data */
expected_size = sizeof(struct usb_cdc_notification) +
le16_to_cpu(dr->wLength);
if (current_size < expected_size) {
/* notification is transmitted fragmented, reassemble */
if (acm->nb_size < expected_size) {
if (acm->nb_size) {
kfree(acm->notification_buffer);
acm->nb_size = 0;
}
alloc_size = roundup_pow_of_two(expected_size);
/*
* kmalloc ensures a valid notification_buffer after a
* use of kfree in case the previous allocation was too
* small. Final freeing is done on disconnect.
*/
acm->notification_buffer =
kmalloc(alloc_size, GFP_ATOMIC);
if (!acm->notification_buffer)
gotoexit;
acm->nb_size = alloc_size;
}
copy_size = min(current_size,
expected_size - acm->nb_index);
memcpy(&acm->notification_buffer[acm->nb_index],
urb->transfer_buffer, copy_size);
acm->nb_index += copy_size;
current_size = acm->nb_index;
}
if (current_size >= expected_size) {
/* notification complete */
acm_process_notification(acm, (unsignedchar *)dr);
acm->nb_index = 0;
}
exit:
retval = usb_submit_urb(urb, GFP_ATOMIC);
if (retval && retval != -EPERM)
dev_err(&acm->control->dev,
'%s - usb_submit_urb failed: %dn', __func__, retval);
}
staticintacm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
{
int res;
if (!test_and_clear_bit(index, &acm->read_urbs_free))
return0;
res = usb_submit_urb(acm->read_urbs[index], mem_flags);
if (res) {
if (res != -EPERM && res != -ENODEV) {
dev_err(&acm->data->dev,
'urb %d failed submission with %dn',
index, res);
}
set_bit(index, &acm->read_urbs_free);
return res;
} else {
dev_vdbg(&acm->data->dev, 'submitted urb %dn', index);
}
return0;
}
staticintacm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
{
int res;
int i;
for (i = 0; i < acm->rx_buflimit; ++i) {
res = acm_submit_read_urb(acm, i, mem_flags);
if (res)
return res;
}
return0;
}
staticvoidacm_process_read_urb(struct acm *acm, struct urb *urb)
{
if (!urb->actual_length)
return;
tty_insert_flip_string(&acm->port, urb->transfer_buffer,
urb->actual_length);
tty_flip_buffer_push(&acm->port);
}
staticvoidacm_read_bulk_callback(struct urb *urb)
{
struct acm_rb *rb = urb->context;
struct acm *acm = rb->instance;
int status = urb->status;
bool stopped = false;
bool stalled = false;
dev_vdbg(&acm->data->dev, 'got urb %d, len %d, status %dn',
rb->index, urb->actual_length, status);
if (!acm->dev) {
dev_dbg(&acm->data->dev, '%s - disconnectedn', __func__);
return;
}
switch (status) {
case0:
usb_mark_last_busy(acm->dev);
acm_process_read_urb(acm, urb);
break;
case -EPIPE:
set_bit(EVENT_RX_STALL, &acm->flags);
stalled = true;
break;
case -ENOENT:
case -ECONNRESET:
case -ESHUTDOWN:
dev_dbg(&acm->data->dev,
'%s - urb shutting down with status: %dn',
__func__, status);
stopped = true;
break;
default:
dev_dbg(&acm->data->dev,
'%s - nonzero urb status received: %dn',
__func__, status);
break;
}
/*
* Make sure URB processing is done before marking as free to avoid
* racing with unthrottle() on another CPU. Matches the barriers
* implied by the test_and_clear_bit() in acm_submit_read_urb().
*/
smp_mb__before_atomic();
set_bit(rb->index, &acm->read_urbs_free);
/*
* Make sure URB is marked as free before checking the throttled flag
* to avoid racing with unthrottle() on another CPU. Matches the
* smp_mb() in unthrottle().
*/
smp_mb__after_atomic();
if (stopped || stalled) {
if (stalled)
schedule_work(&acm->work);
return;
}
if (test_bit(ACM_THROTTLED, &acm->flags))
return;
acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
}
/* data interface wrote those outgoing bytes */
staticvoidacm_write_bulk(struct urb *urb)
{
struct acm_wb *wb = urb->context;
struct acm *acm = wb->instance;
unsignedlong flags;
int status = urb->status;
if (status || (urb->actual_length != urb->transfer_buffer_length))
dev_vdbg(&acm->data->dev, 'wrote len %d/%d, status %dn',
urb->actual_length,
urb->transfer_buffer_length,
status);
spin_lock_irqsave(&acm->write_lock, flags);
acm_write_done(acm, wb);
spin_unlock_irqrestore(&acm->write_lock, flags);
set_bit(EVENT_TTY_WAKEUP, &acm->flags);
schedule_work(&acm->work);
}
staticvoidacm_softint(struct work_struct *work)
{
int i;
struct acm *acm = container_of(work, struct acm, work);
if (test_bit(EVENT_RX_STALL, &acm->flags)) {
if (!(usb_autopm_get_interface(acm->data))) {
for (i = 0; i < acm->rx_buflimit; i++)
usb_kill_urb(acm->read_urbs[i]);
usb_clear_halt(acm->dev, acm->in);
acm_submit_read_urbs(acm, GFP_KERNEL);
usb_autopm_put_interface(acm->data);
}
clear_bit(EVENT_RX_STALL, &acm->flags);
}
if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags))
tty_port_tty_wakeup(&acm->port);
}
/*
* TTY handlers
*/
staticintacm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
{
struct acm *acm;
int retval;
acm = acm_get_by_minor(tty->index);
if (!acm)
return -ENODEV;
retval = tty_standard_install(driver, tty);
if (retval)
goto error_init_termios;
/*
* Suppress initial echoing for some devices which might send data
* immediately after acm driver has been installed.
*/
if (acm->quirks & DISABLE_ECHO)
tty->termios.c_lflag &= ~ECHO;
tty->driver_data = acm;
return0;
error_init_termios:
tty_port_put(&acm->port);
return retval;
}
staticintacm_tty_open(struct tty_struct *tty, struct file *filp)
{
struct acm *acm = tty->driver_data;
returntty_port_open(&acm->port, tty, filp);
}
staticvoidacm_port_dtr_rts(struct tty_port *port, int raise)
{
struct acm *acm = container_of(port, struct acm, port);
int val;
int res;
if (raise)
val = ACM_CTRL_DTR | ACM_CTRL_RTS;
else
val = 0;
/* FIXME: add missing ctrlout locking throughout driver */
acm->ctrlout = val;
res = acm_set_control(acm, val);
if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
dev_err(&acm->control->dev, 'failed to set dtr/rtsn');
}
staticintacm_port_activate(struct tty_port *port, struct tty_struct *tty)
{
struct acm *acm = container_of(port, struct acm, port);
int retval = -ENODEV;
int i;
mutex_lock(&acm->mutex);
if (acm->disconnected)
goto disconnected;
retval = usb_autopm_get_interface(acm->control);
if (retval)
goto error_get_interface;
/*
* FIXME: Why do we need this? Allocating 64K of physically contiguous
* memory is really nasty..
*/
set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
acm->control->needs_remote_wakeup = 1;
acm->ctrlurb->dev = acm->dev;
retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
if (retval) {
dev_err(&acm->control->dev,
'%s - usb_submit_urb(ctrl irq) failedn', __func__);
goto error_submit_urb;
}
acm_tty_set_termios(tty, NULL);
/*
* Unthrottle device in case the TTY was closed while throttled.
*/
clear_bit(ACM_THROTTLED, &acm->flags);
retval = acm_submit_read_urbs(acm, GFP_KERNEL);
if (retval)
goto error_submit_read_urbs;
usb_autopm_put_interface(acm->control);
mutex_unlock(&acm->mutex);
return0;
error_submit_read_urbs:
for (i = 0; i < acm->rx_buflimit; i++)
usb_kill_urb(acm->read_urbs[i]);
usb_kill_urb(acm->ctrlurb);
error_submit_urb:
usb_autopm_put_interface(acm->control);
error_get_interface:
disconnected:
mutex_unlock(&acm->mutex);
returnusb_translate_errors(retval);
}
staticvoidacm_port_destruct(struct tty_port *port)
{
struct acm *acm = container_of(port, struct acm, port);
acm_release_minor(acm);
usb_put_intf(acm->control);
kfree(acm->country_codes);
kfree(acm);
}
staticvoidacm_port_shutdown(struct tty_port *port)
{
struct acm *acm = container_of(port, struct acm, port);
struct urb *urb;
struct acm_wb *wb;
/*
* Need to grab write_lock to prevent race with resume, but no need to
* hold it due to the tty-port initialised flag.
*/
spin_lock_irq(&acm->write_lock);
spin_unlock_irq(&acm->write_lock);
usb_autopm_get_interface_no_resume(acm->control);
acm->control->needs_remote_wakeup = 0;
usb_autopm_put_interface(acm->control);
for (;;) {
urb = usb_get_from_anchor(&acm->delayed);
if (!urb)
break;
wb = urb->context;
wb->use = 0;
usb_autopm_put_interface_async(acm->control);
}
acm_kill_urbs(acm);
}
staticvoidacm_tty_cleanup(struct tty_struct *tty)
{
struct acm *acm = tty->driver_data;
tty_port_put(&acm->port);
}
staticvoidacm_tty_hangup(struct tty_struct *tty)
{
struct acm *acm = tty->driver_data;
tty_port_hangup(&acm->port);
}
staticvoidacm_tty_close(struct tty_struct *tty, struct file *filp)
{
struct acm *acm = tty->driver_data;
tty_port_close(&acm->port, tty, filp);
}
staticintacm_tty_write(struct tty_struct *tty,
constunsignedchar *buf, int count)
{
struct acm *acm = tty->driver_data;
int stat;
unsignedlong flags;
int wbn;
struct acm_wb *wb;
if (!count)
return0;
dev_vdbg(&acm->data->dev, '%d bytes from tty layern', count);
spin_lock_irqsave(&acm->write_lock, flags);
wbn = acm_wb_alloc(acm);
if (wbn < 0) {
spin_unlock_irqrestore(&acm->write_lock, flags);
return0;
}
wb = &acm->wb[wbn];
if (!acm->dev) {
wb->use = 0;
spin_unlock_irqrestore(&acm->write_lock, flags);
return -ENODEV;
}
count = (count > acm->writesize) ? acm->writesize : count;
dev_vdbg(&acm->data->dev, 'writing %d bytesn', count);
memcpy(wb->buf, buf, count);
wb->len = count;
stat = usb_autopm_get_interface_async(acm->control);
if (stat) {
wb->use = 0;
spin_unlock_irqrestore(&acm->write_lock, flags);
return stat;
}
if (acm->susp_count) {
usb_anchor_urb(wb->urb, &acm->delayed);
spin_unlock_irqrestore(&acm->write_lock, flags);
return count;
}
stat = acm_start_wb(acm, wb);
spin_unlock_irqrestore(&acm->write_lock, flags);
if (stat < 0)
return stat;
return count;
}
staticintacm_tty_write_room(struct tty_struct *tty)
{
struct acm *acm = tty->driver_data;
/*
* Do not let the line discipline to know that we have a reserve,
* or it might get too enthusiastic.
*/
returnacm_wb_is_avail(acm) ? acm->writesize : 0;
}
staticintacm_tty_chars_in_buffer(struct tty_struct *tty)
{
struct acm *acm = tty->driver_data;
/*
* if the device was unplugged then any remaining characters fell out
* of the connector ;)
*/
if (acm->disconnected)
return0;
/*
* This is inaccurate (overcounts), but it works.
*/
return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
}
staticvoidacm_tty_throttle(struct tty_struct *tty)
{
struct acm *acm = tty->driver_data;
set_bit(ACM_THROTTLED, &acm->flags);
}
staticvoidacm_tty_unthrottle(struct tty_struct *tty)
{
struct acm *acm = tty->driver_data;
clear_bit(ACM_THROTTLED, &acm->flags);
/* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */
smp_mb();
acm_submit_read_urbs(acm, GFP_KERNEL);
}
staticintacm_tty_break_ctl(struct tty_struct *tty, int state)
{
struct acm *acm = tty->driver_data;
int retval;
retval = acm_send_break(acm, state ? 0xffff : 0);
if (retval < 0)
dev_dbg(&acm->control->dev,
'%s - send break failedn', __func__);
return retval;
}
staticintacm_tty_tiocmget(struct tty_struct *tty)
{
struct acm *acm = tty->driver_data;
return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
(acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
(acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
(acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
(acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
TIOCM_CTS;
}
staticintacm_tty_tiocmset(struct tty_struct *tty,
unsignedint set, unsignedint clear)
{
struct acm *acm = tty->driver_data;
unsignedint newctrl;
newctrl = acm->ctrlout;
set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
(set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
(clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
newctrl = (newctrl & ~clear) | set;
if (acm->ctrlout newctrl)
return0;
returnacm_set_control(acm, acm->ctrlout = newctrl);
}
staticintget_serial_info(struct tty_struct *tty, struct serial_struct *ss)
{
struct acm *acm = tty->driver_data;
ss->xmit_fifo_size = acm->writesize;
ss->baud_base = le32_to_cpu(acm->line.dwDTERate);
ss->close_delay = acm->port.close_delay / 10;
ss->closing_wait = acm->port.closing_wait ASYNC_CLOSING_WAIT_NONE ?
ASYNC_CLOSING_WAIT_NONE :
acm->port.closing_wait / 10;
return0;
}
staticintset_serial_info(struct tty_struct *tty, struct serial_struct *ss)
{
struct acm *acm = tty->driver_data;
unsignedint closing_wait, close_delay;
int retval = 0;
close_delay = ss->close_delay * 10;
closing_wait = ss->closing_wait ASYNC_CLOSING_WAIT_NONE ?
ASYNC_CLOSING_WAIT_NONE : ss->closing_wait * 10;
mutex_lock(&acm->port.mutex);
if (!capable(CAP_SYS_ADMIN)) {
if ((close_delay != acm->port.close_delay) ||
(closing_wait != acm->port.closing_wait))
retval = -EPERM;
else
retval = -EOPNOTSUPP;
} else {
acm->port.close_delay = close_delay;
acm->port.closing_wait = closing_wait;
}
mutex_unlock(&acm->port.mutex);
return retval;
}
staticintwait_serial_change(struct acm *acm, unsignedlong arg)
{
int rv = 0;
DECLARE_WAITQUEUE(wait, current);
struct async_icount old, new;
do {
spin_lock_irq(&acm->read_lock);
old = acm->oldcount;
new = acm->iocount;
acm->oldcount = new;
spin_unlock_irq(&acm->read_lock);
if ((arg & TIOCM_DSR) &&
old.dsr != new.dsr)
break;
if ((arg & TIOCM_CD) &&
old.dcd != new.dcd)
break;
if ((arg & TIOCM_RI) &&
old.rng != new.rng)
break;
add_wait_queue(&acm->wioctl, &wait);
set_current_state(TASK_INTERRUPTIBLE);
schedule();
remove_wait_queue(&acm->wioctl, &wait);
if (acm->disconnected) {
if (arg & TIOCM_CD)
break;
else
rv = -ENODEV;
} else {
if (signal_pending(current))
rv = -ERESTARTSYS;
}
} while (!rv);
return rv;
}
staticintacm_tty_get_icount(struct tty_struct *tty,
struct serial_icounter_struct *icount)
{
struct acm *acm = tty->driver_data;
icount->dsr = acm->iocount.dsr;
icount->rng = acm->iocount.rng;
icount->dcd = acm->iocount.dcd;
icount->frame = acm->iocount.frame;
icount->overrun = acm->iocount.overrun;
icount->parity = acm->iocount.parity;
icount->brk = acm->iocount.brk;
return0;
}
staticintacm_tty_ioctl(struct tty_struct *tty,
unsignedint cmd, unsignedlong arg)
{
struct acm *acm = tty->driver_data;
int rv = -ENOIOCTLCMD;
switch (cmd) {
case TIOCMIWAIT:
rv = usb_autopm_get_interface(acm->control);
if (rv < 0) {
rv = -EIO;
break;
}
rv = wait_serial_change(acm, arg);
usb_autopm_put_interface(acm->control);
break;
}
return rv;
}
staticvoidacm_tty_set_termios(struct tty_struct *tty,
struct ktermios *termios_old)
{
struct acm *acm = tty->driver_data;
struct ktermios *termios = &tty->termios;
struct usb_cdc_line_coding newline;
int newctrl = acm->ctrlout;
newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
newline.bParityType = termios->c_cflag & PARENB ?
(termios->c_cflag & PARODD ? 1 : 2) +
(termios->c_cflag & CMSPAR ? 2 : 0) : 0;
switch (termios->c_cflag & CSIZE) {
case CS5:
newline.bDataBits = 5;
break;
case CS6:
newline.bDataBits = 6;
break;
case CS7:
newline.bDataBits = 7;
break;
case CS8:
default:
newline.bDataBits = 8;
break;
}
/* FIXME: Needs to clear unsupported bits in the termios */
acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
if (C_BAUD(tty) B0) {
newline.dwDTERate = acm->line.dwDTERate;
newctrl &= ~ACM_CTRL_DTR;
} elseif (termios_old && (termios_old->c_cflag & CBAUD) B0) {
newctrl |= ACM_CTRL_DTR;
}
if (newctrl != acm->ctrlout)
acm_set_control(acm, acm->ctrlout = newctrl);
if (memcmp(&acm->line, &newline, sizeof newline)) {
memcpy(&acm->line, &newline, sizeof newline);
dev_dbg(&acm->control->dev, '%s - set line: %d%d%d%dn',
__func__,
le32_to_cpu(newline.dwDTERate),
newline.bCharFormat, newline.bParityType,
newline.bDataBits);
acm_set_line(acm, &acm->line);
}
}
staticconststruct tty_port_operations acm_port_ops = {
.dtr_rts = acm_port_dtr_rts,
.shutdown = acm_port_shutdown,
.activate = acm_port_activate,
.destruct = acm_port_destruct,
};
/*
* USB probe and disconnect routines.
*/
/* Little helpers: write/read buffers free */
staticvoidacm_write_buffers_free(struct acm *acm)
{
int i;
struct acm_wb *wb;
for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah);
}
staticvoidacm_read_buffers_free(struct acm *acm)
{
int i;
for (i = 0; i < acm->rx_buflimit; i++)
usb_free_coherent(acm->dev, acm->readsize,
acm->read_buffers[i].base, acm->read_buffers[i].dma);
}
/* Little helper: write buffers allocate */
staticintacm_write_buffers_alloc(struct acm *acm)
{
int i;
struct acm_wb *wb;
for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
&wb->dmah);
if (!wb->buf) {
while (i != 0) {
--i;
--wb;
usb_free_coherent(acm->dev, acm->writesize,
wb->buf, wb->dmah);
}
return -ENOMEM;
}
}
return0;
}
staticintacm_probe(struct usb_interface *intf,
conststruct usb_device_id *id)
{
struct usb_cdc_union_desc *union_header = NULL;
struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL;
unsignedchar *buffer = intf->altsetting->extra;
int buflen = intf->altsetting->extralen;
struct usb_interface *control_interface;
struct usb_interface *data_interface;
struct usb_endpoint_descriptor *epctrl = NULL;
struct usb_endpoint_descriptor *epread = NULL;
struct usb_endpoint_descriptor *epwrite = NULL;
struct usb_device *usb_dev = interface_to_usbdev(intf);
struct usb_cdc_parsed_header h;
struct acm *acm;
intminor;
int ctrlsize, readsize;
u8 *buf;
int call_intf_num = -1;
int data_intf_num = -1;
unsignedlong quirks;
int num_rx_buf;
int i;
int combined_interfaces = 0;
struct device *tty_dev;
int rv = -ENOMEM;
int res;
/* normal quirks */
quirks = (unsignedlong)id->driver_info;
if (quirks IGNORE_DEVICE)
return -ENODEV;
memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header));
num_rx_buf = (quirks SINGLE_RX_URB) ? 1 : ACM_NR;
/* handle quirks deadly to normal probing*/
if (quirks NO_UNION_NORMAL) {
data_interface = usb_ifnum_to_if(usb_dev, 1);
control_interface = usb_ifnum_to_if(usb_dev, 0);
/* we would crash */
if (!data_interface || !control_interface)
return -ENODEV;
goto skip_normal_probe;
}
/* normal probing*/
if (!buffer) {
dev_err(&intf->dev, 'Weird descriptor referencesn');
return -EINVAL;
}
if (!intf->cur_altsetting)
return -EINVAL;
if (!buflen) {
if (intf->cur_altsetting->endpoint &&
intf->cur_altsetting->endpoint->extralen &&
intf->cur_altsetting->endpoint->extra) {
dev_dbg(&intf->dev,
'Seeking extra descriptors on endpointn');
buflen = intf->cur_altsetting->endpoint->extralen;
buffer = intf->cur_altsetting->endpoint->extra;
} else {
dev_err(&intf->dev,
'Zero length descriptor referencesn');
return -EINVAL;
}
}
cdc_parse_cdc_header(&h, intf, buffer, buflen);
union_header = h.usb_cdc_union_desc;
cmgmd = h.usb_cdc_call_mgmt_descriptor;
if (cmgmd)
call_intf_num = cmgmd->bDataInterface;
if (!union_header) {
if (call_intf_num > 0) {
dev_dbg(&intf->dev, 'No union descriptor, using call management descriptorn');
/* quirks for Droids MuIn LCD */
if (quirks & NO_DATA_INTERFACE) {
data_interface = usb_ifnum_to_if(usb_dev, 0);
} else {
data_intf_num = call_intf_num;
data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
}
control_interface = intf;
} else {
if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
dev_dbg(&intf->dev,'No union descriptor, giving upn');
return -ENODEV;
} else {
dev_warn(&intf->dev,'No union descriptor, testing for castrated devicen');
combined_interfaces = 1;
control_interface = data_interface = intf;
goto look_for_collapsed_interface;
}
}
} else {
data_intf_num = union_header->bSlaveInterface0;
control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
}
if (!control_interface || !data_interface) {
dev_dbg(&intf->dev, 'no interfacesn');
return -ENODEV;
}
if (!data_interface->cur_altsetting || !control_interface->cur_altsetting)
return -ENODEV;
if (data_intf_num != call_intf_num)
dev_dbg(&intf->dev, 'Separate call control interface. That is not fully supported.n');
if (control_interface data_interface) {
/* some broken devices designed for windows work this way */
dev_warn(&intf->dev,'Control and data interfaces are not separated!n');
combined_interfaces = 1;
/* a popular other OS doesn't use it */
quirks |= NO_CAP_LINE;
if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
dev_err(&intf->dev, 'This needs exactly 3 endpointsn');
return -EINVAL;
}
look_for_collapsed_interface:
res = usb_find_common_endpoints(data_interface->cur_altsetting,
&epread, &epwrite, &epctrl, NULL);
if (res)
return res;
goto made_compressed_probe;
}
skip_normal_probe:
/*workaround for switched interfaces */
if (data_interface->cur_altsetting->desc.bInterfaceClass
!= CDC_DATA_INTERFACE_TYPE) {
if (control_interface->cur_altsetting->desc.bInterfaceClass
CDC_DATA_INTERFACE_TYPE) {
dev_dbg(&intf->dev,
'Your device has switched interfaces.n');
swap(control_interface, data_interface);
} else {
return -EINVAL;
}
}
/* Accept probe requests only for the control interface */
if (!combined_interfaces && intf != control_interface)
return -ENODEV;
if (!combined_interfaces && usb_interface_claimed(data_interface)) {
/* valid in this context */
dev_dbg(&intf->dev, 'The data interface isn't availablen');
return -EBUSY;
}
if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
control_interface->cur_altsetting->desc.bNumEndpoints0)
return -EINVAL;
epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
epread = &data_interface->cur_altsetting->endpoint[0].desc;
epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
/* workaround for switched endpoints */
if (!usb_endpoint_dir_in(epread)) {
/* descriptors are swapped */
dev_dbg(&intf->dev,
'The data interface has switched endpointsn');
swap(epread, epwrite);
}
made_compressed_probe:
dev_dbg(&intf->dev, 'interfaces are validn');
acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
if (acm NULL)
goto alloc_fail;
tty_port_init(&acm->port);
acm->port.ops = &acm_port_ops;
ctrlsize = usb_endpoint_maxp(epctrl);
readsize = usb_endpoint_maxp(epread) *
(quirks SINGLE_RX_URB ? 1 : 2);
acm->combined_interfaces = combined_interfaces;
acm->writesize = usb_endpoint_maxp(epwrite) * 20;
acm->control = control_interface;
acm->data = data_interface;
usb_get_intf(acm->control); /* undone in destruct() */
minor = acm_alloc_minor(acm);
if (minor < 0)
goto alloc_fail1;
acm->minor = minor;
acm->dev = usb_dev;
if (h.usb_cdc_acm_descriptor)
acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities;
if (quirks & NO_CAP_LINE)
acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
acm->ctrlsize = ctrlsize;
acm->readsize = readsize;
acm->rx_buflimit = num_rx_buf;
INIT_WORK(&acm->work, acm_softint);
init_waitqueue_head(&acm->wioctl);
spin_lock_init(&acm->write_lock);
spin_lock_init(&acm->read_lock);
mutex_init(&acm->mutex);
if (usb_endpoint_xfer_int(epread)) {
acm->bInterval = epread->bInterval;
acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress);
} else {
acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
}
if (usb_endpoint_xfer_int(epwrite))
acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress);
else
acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress);
init_usb_anchor(&acm->delayed);
acm->quirks = quirks;
buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
if (!buf)
goto alloc_fail1;
acm->ctrl_buffer = buf;
if (acm_write_buffers_alloc(acm) < 0)
goto alloc_fail2;
acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
if (!acm->ctrlurb)
goto alloc_fail3;
for (i = 0; i < num_rx_buf; i++) {
struct acm_rb *rb = &(acm->read_buffers[i]);
struct urb *urb;
rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
&rb->dma);
if (!rb->base)
goto alloc_fail4;
rb->index = i;
rb->instance = acm;
urb = usb_alloc_urb(0, GFP_KERNEL);
if (!urb)
goto alloc_fail4;
urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
urb->transfer_dma = rb->dma;
if (usb_endpoint_xfer_int(epread))
usb_fill_int_urb(urb, acm->dev, acm->in, rb->base,
acm->readsize,
acm_read_bulk_callback, rb,
acm->bInterval);
else
usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base,
acm->readsize,
acm_read_bulk_callback, rb);
acm->read_urbs[i] = urb;
__set_bit(i, &acm->read_urbs_free);
}
for (i = 0; i < ACM_NW; i++) {
struct acm_wb *snd = &(acm->wb[i]);
snd->urb = usb_alloc_urb(0, GFP_KERNEL);
if (snd->urbNULL)
goto alloc_fail5;
if (usb_endpoint_xfer_int(epwrite))
usb_fill_int_urb(snd->urb, usb_dev, acm->out,
NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
else
usb_fill_bulk_urb(snd->urb, usb_dev, acm->out,
NULL, acm->writesize, acm_write_bulk, snd);
snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
if (quirks & SEND_ZERO_PACKET)
snd->urb->transfer_flags |= URB_ZERO_PACKET;
snd->instance = acm;
}
usb_set_intfdata(intf, acm);
i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
if (i < 0)
goto alloc_fail5;
if (h.usb_cdc_country_functional_desc) { /* export the country data */
struct usb_cdc_country_functional_desc * cfd =
h.usb_cdc_country_functional_desc;
acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
if (!acm->country_codes)
goto skip_countries;
acm->country_code_size = cfd->bLength - 4;
memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
cfd->bLength - 4);
acm->country_rel_date = cfd->iCountryCodeRelDate;
i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
if (i < 0) {
kfree(acm->country_codes);
acm->country_codes = NULL;
acm->country_code_size = 0;
goto skip_countries;
}
i = device_create_file(&intf->dev,
&dev_attr_iCountryCodeRelDate);
if (i < 0) {
device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
kfree(acm->country_codes);
acm->country_codes = NULL;
acm->country_code_size = 0;
goto skip_countries;
}
}
skip_countries:
usb_fill_int_urb(acm->ctrlurb, usb_dev,
usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
/* works around buggy devices */
epctrl->bInterval ? epctrl->bInterval : 16);
acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
acm->ctrlurb->transfer_dma = acm->ctrl_dma;
acm->notification_buffer = NULL;
acm->nb_index = 0;
acm->nb_size = 0;
dev_info(&intf->dev, 'ttyACM%d: USB ACM devicen', minor);
acm->line.dwDTERate = cpu_to_le32(9600);
acm->line.bDataBits = 8;
acm_set_line(acm, &acm->line);
usb_driver_claim_interface(&acm_driver, data_interface, acm);
usb_set_intfdata(data_interface, acm);
tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
&control_interface->dev);
if (IS_ERR(tty_dev)) {
rv = PTR_ERR(tty_dev);
goto alloc_fail6;
}
if (quirks & CLEAR_HALT_CONDITIONS) {
usb_clear_halt(usb_dev, acm->in);
usb_clear_halt(usb_dev, acm->out);
}
return0;
alloc_fail6:
if (acm->country_codes) {
device_remove_file(&acm->control->dev,
&dev_attr_wCountryCodes);
device_remove_file(&acm->control->dev,
&dev_attr_iCountryCodeRelDate);
kfree(acm->country_codes);
}
device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
alloc_fail5:
usb_set_intfdata(intf, NULL);
for (i = 0; i < ACM_NW; i++)
usb_free_urb(acm->wb[i].urb);
alloc_fail4:
for (i = 0; i < num_rx_buf; i++)
usb_free_urb(acm->read_urbs[i]);
acm_read_buffers_free(acm);
usb_free_urb(acm->ctrlurb);
alloc_fail3:
acm_write_buffers_free(acm);
alloc_fail2:
usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
alloc_fail1:
tty_port_put(&acm->port);
alloc_fail:
return rv;
}
staticvoidacm_disconnect(struct usb_interface *intf)
{
struct acm *acm = usb_get_intfdata(intf);
struct tty_struct *tty;
int i;
/* sibling interface is already cleaning up */
if (!acm)
return;
mutex_lock(&acm->mutex);
acm->disconnected = true;
if (acm->country_codes) {
device_remove_file(&acm->control->dev,
&dev_attr_wCountryCodes);
device_remove_file(&acm->control->dev,
&dev_attr_iCountryCodeRelDate);
}
wake_up_all(&acm->wioctl);
device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
usb_set_intfdata(acm->control, NULL);
usb_set_intfdata(acm->data, NULL);
mutex_unlock(&acm->mutex);
tty = tty_port_tty_get(&acm->port);
if (tty) {
tty_vhangup(tty);
tty_kref_put(tty);
}
acm_kill_urbs(acm);
cancel_work_sync(&acm->work);
tty_unregister_device(acm_tty_driver, acm->minor);
usb_free_urb(acm->ctrlurb);
for (i = 0; i < ACM_NW; i++)
usb_free_urb(acm->wb[i].urb);
for (i = 0; i < acm->rx_buflimit; i++)
usb_free_urb(acm->read_urbs[i]);
acm_write_buffers_free(acm);
usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
acm_read_buffers_free(acm);
kfree(acm->notification_buffer);
if (!acm->combined_interfaces)
usb_driver_release_interface(&acm_driver, intf acm->control ?
acm->data : acm->control);
tty_port_put(&acm->port);
}
#ifdef CONFIG_PM
staticintacm_suspend(struct usb_interface *intf, pm_message_t message)
{
struct acm *acm = usb_get_intfdata(intf);
int cnt;
spin_lock_irq(&acm->write_lock);
if (PMSG_IS_AUTO(message)) {
if (acm->transmitting) {
spin_unlock_irq(&acm->write_lock);
return -EBUSY;
}
}
cnt = acm->susp_count++;
spin_unlock_irq(&acm->write_lock);
if (cnt)
return0;
acm_kill_urbs(acm);
cancel_work_sync(&acm->work);
return0;
}
staticintacm_resume(struct usb_interface *intf)
{
struct acm *acm = usb_get_intfdata(intf);
struct urb *urb;
int rv = 0;
spin_lock_irq(&acm->write_lock);
if (--acm->susp_count)
goto out;
if (tty_port_initialized(&acm->port)) {
rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
for (;;) {
urb = usb_get_from_anchor(&acm->delayed);
if (!urb)
break;
acm_start_wb(acm, urb->context);
}
/*
* delayed error checking because we must
* do the write path at all cost
*/
if (rv < 0)
goto out;
rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
}
out:
spin_unlock_irq(&acm->write_lock);
return rv;
}
staticintacm_reset_resume(struct usb_interface *intf)
{
struct acm *acm = usb_get_intfdata(intf);
if (tty_port_initialized(&acm->port))
tty_port_tty_hangup(&acm->port, false);
returnacm_resume(intf);
}
#endif/* CONFIG_PM */
staticintacm_pre_reset(struct usb_interface *intf)
{
struct acm *acm = usb_get_intfdata(intf);
clear_bit(EVENT_RX_STALL, &acm->flags);
acm->nb_index = 0; /* pending control transfers are lost */
return0;
}
#defineNOKIA_PCSUITE_ACM_INFO(x)
USB_DEVICE_AND_INTERFACE_INFO(0x0421, x,
USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
USB_CDC_ACM_PROTO_VENDOR)
#defineSAMSUNG_PCSUITE_ACM_INFO(x)
USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x,
USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
USB_CDC_ACM_PROTO_VENDOR)
/*
* USB driver structure.
*/
static const struct usb_device_id acm_ids[] = {
/* quirky and broken devices */
{ USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
.driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
{ USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
.driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
{ USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
},
{ USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
},
{ USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */
.driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */
},
{ USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
},
{ USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
},
{ USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
},
{ USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
.driver_info = SINGLE_RX_URB,
},
{ USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
.driver_info = SINGLE_RX_URB, /* firmware bug */
},
{ USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
.driver_info = SINGLE_RX_URB, /* firmware bug */
},
{ USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */
.driver_info = SINGLE_RX_URB,
},
{ USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */
.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
},
{ USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
},
{ USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
},
{ USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
},
{ USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
},
{ USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
},
{ USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */
.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
},
{ USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
.driver_info = QUIRK_CONTROL_LINE_STATE, },
{ USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
{ USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */
{ USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
},
/* Motorola H24 HSPA module: */
{ USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
{ USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
.driver_info = NO_UNION_NORMAL, /* handle only modem interface */
},
{ USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
.driver_info = NO_UNION_NORMAL, /* handle only modem interface */
},
{ USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
.driver_info = NO_UNION_NORMAL, /* handle only modem interface */
},
{ USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
.driver_info = NO_UNION_NORMAL, /* handle only modem interface */
},
{ USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
.driver_info = NO_UNION_NORMAL, /* handle only modem interface */
},
{ USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
.driver_info = NO_UNION_NORMAL, /* handle only modem interface */
},
{ USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
.driver_info = NO_UNION_NORMAL, /* handle only modem interface */
},
{ USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
.driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
data interface instead of
communications interface.
Maybe we should define a new
quirk for this. */
},
{ USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
.driver_info = NO_UNION_NORMAL,
},
{ USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
.driver_info = NO_UNION_NORMAL,
},
{ USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
.driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
},
{ USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
.driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
},
{ USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */
.driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
},
{ USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */
.driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */
},
{ USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */
.driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
},
{ USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
.driver_info = CLEAR_HALT_CONDITIONS,
},
/* Nokia S60 phones expose two ACM channels. The first is
* a modem and is picked up by the standard AT-command
* information below. The second is 'vendor-specific' but
* is treated as a serial device at the S60 end, so we want
* to expose it on Linux too. */
{ NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
{ NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
{ NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
{ NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
{ NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
{ NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
{ NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
{ NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
{ NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
{ NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
{ NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
{ NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
{ NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
{ NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
{ NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
{ NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
{ NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
{ NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
{ NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
{ NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
{ NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
{ NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
{ NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
{ NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
{ NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
{ NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
{ NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
{ NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
{ NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
{ NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
{ NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
{ NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
{ NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
{ NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
{ NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
{ NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
{ NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
{ NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
{ NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
{ NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
{ NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
{ NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
{ NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
{ NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
{ NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
{ NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
{ NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
{ NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
{ NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
{ NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
{ NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
{ NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
{ NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
{ NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
{ NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
{ NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
{ NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
{ SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
/* Support for Owen devices */
{ USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
/* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS.. NOT a modem! */
/* Support for Droids MuIn LCD */
{ USB_DEVICE(0x04d8, 0x000b),
.driver_info = NO_DATA_INTERFACE,
},
#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
{ USB_DEVICE(0x04d8, 0x0082), /* Application mode */
.driver_info = IGNORE_DEVICE,
},
{ USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
.driver_info = IGNORE_DEVICE,
},
#endif
/*Samsung phone in firmware update mode */
{ USB_DEVICE(0x04e8, 0x685d),
.driver_info = IGNORE_DEVICE,
},
/* Exclude Infineon Flash Loader utility */
{ USB_DEVICE(0x058b, 0x0041),
.driver_info = IGNORE_DEVICE,
},
{ USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */
.driver_info = SEND_ZERO_PACKET,
},
{ USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */
.driver_info = SEND_ZERO_PACKET,
},
/* control interfaces without any protocol set */
{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
USB_CDC_PROTO_NONE) },
/* control interfaces with various AT-command sets */
{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
USB_CDC_ACM_PROTO_AT_V25TER) },
{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
USB_CDC_ACM_PROTO_AT_PCCA101) },
{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
USB_CDC_ACM_PROTO_AT_GSM) },
{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
USB_CDC_ACM_PROTO_AT_3G) },
{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
USB_CDC_ACM_PROTO_AT_CDMA) },
{ USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
.driver_info = SEND_ZERO_PACKET,
},
{ }
};
MODULE_DEVICE_TABLE(usb, acm_ids);
staticstruct usb_driver acm_driver = {
.name = 'cdc_acm',
.probe = acm_probe,
.disconnect = acm_disconnect,
#ifdef CONFIG_PM
.suspend = acm_suspend,
.resume = acm_resume,
.reset_resume = acm_reset_resume,
#endif
.pre_reset = acm_pre_reset,
.id_table = acm_ids,
#ifdef CONFIG_PM
.supports_autosuspend = 1,
#endif
.disable_hub_initiated_lpm = 1,
};
/*
* TTY driver structures.
*/
staticconststruct tty_operations acm_ops = {
.install = acm_tty_install,
.open = acm_tty_open,
.close = acm_tty_close,
.cleanup = acm_tty_cleanup,
.hangup = acm_tty_hangup,
.write = acm_tty_write,
.write_room = acm_tty_write_room,
.ioctl = acm_tty_ioctl,
.throttle = acm_tty_throttle,
.unthrottle = acm_tty_unthrottle,
.chars_in_buffer = acm_tty_chars_in_buffer,
.break_ctl = acm_tty_break_ctl,
.set_termios = acm_tty_set_termios,
.tiocmget = acm_tty_tiocmget,
.tiocmset = acm_tty_tiocmset,
.get_serial = get_serial_info,
.set_serial = set_serial_info,
.get_icount = acm_tty_get_icount,
};
/*
* Init / exit.
*/
staticint __init acm_init(void)
{
int retval;
acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
if (!acm_tty_driver)
return -ENOMEM;
acm_tty_driver->driver_name = 'acm',
acm_tty_driver->name = 'ttyACM',
acm_tty_driver->major = ACM_TTY_MAJOR,
acm_tty_driver->minor_start = 0,
acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
acm_tty_driver->init_termios = tty_std_termios;
acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
HUPCL | CLOCAL;
tty_set_operations(acm_tty_driver, &acm_ops);
retval = tty_register_driver(acm_tty_driver);
if (retval) {
put_tty_driver(acm_tty_driver);
return retval;
}
retval = usb_register(&acm_driver);
if (retval) {
tty_unregister_driver(acm_tty_driver);
put_tty_driver(acm_tty_driver);
return retval;
}
printk(KERN_INFO KBUILD_MODNAME ': ' DRIVER_DESC 'n');
return0;
}
staticvoid __exit acm_exit(void)
{
usb_deregister(&acm_driver);
tty_unregister_driver(acm_tty_driver);
put_tty_driver(acm_tty_driver);
idr_destroy(&acm_minors);
}
module_init(acm_init);
module_exit(acm_exit);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE('GPL');
MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
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