// SPDX-License-Identifier: GPL-2.0+
|
/*
|
* cdc-acm.c
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*
|
* Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de>
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* Copyright (c) 1999 Pavel Machek <pavel@ucw.cz>
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* Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com>
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* Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz>
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* Copyright (c) 2004 Oliver Neukum <oliver@neukum.name>
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* Copyright (c) 2005 David Kubicek <dave@awk.cz>
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* Copyright (c) 2011 Johan Hovold <jhovold@gmail.com>
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*
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* USB Abstract Control Model driver for USB modems and ISDN adapters
|
*
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* Sponsored by SuSE
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*/
|
|
#undef DEBUG
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#undef VERBOSE_DEBUG
|
|
#include <linux/kernel.h>
|
#include <linux/sched/signal.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/log2.h>
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#include <linux/tty.h>
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#include <linux/serial.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_flip.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/uaccess.h>
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#include <linux/usb.h>
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#include <linux/usb/cdc.h>
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#include <asm/byteorder.h>
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#include <asm/unaligned.h>
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#include <linux/idr.h>
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#include <linux/list.h>
|
|
#include "cdc-acm.h"
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|
|
#define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
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#define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
|
|
static struct usb_driver acm_driver;
|
static struct tty_driver *acm_tty_driver;
|
|
static DEFINE_IDR(acm_minors);
|
static DEFINE_MUTEX(acm_minors_lock);
|
|
static void acm_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.
|
*/
|
static struct acm *acm_get_by_minor(unsigned int 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'.
|
*/
|
static int acm_alloc_minor(struct acm *acm)
|
{
|
int minor;
|
|
mutex_lock(&acm_minors_lock);
|
minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL);
|
mutex_unlock(&acm_minors_lock);
|
|
return minor;
|
}
|
|
/* Release the minor number associated with 'acm'. */
|
static void acm_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.
|
*/
|
|
static int acm_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 %d\n",
|
__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...
|
*/
|
static inline int acm_set_control(struct acm *acm, int control)
|
{
|
if (acm->quirks & QUIRK_CONTROL_LINE_STATE)
|
return -EOPNOTSUPP;
|
|
return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE,
|
control, NULL, 0);
|
}
|
|
#define acm_set_line(acm, line) \
|
acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
|
#define acm_send_break(acm, ms) \
|
acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
|
|
static void acm_poison_urbs(struct acm *acm)
|
{
|
int i;
|
|
usb_poison_urb(acm->ctrlurb);
|
for (i = 0; i < ACM_NW; i++)
|
usb_poison_urb(acm->wb[i].urb);
|
for (i = 0; i < acm->rx_buflimit; i++)
|
usb_poison_urb(acm->read_urbs[i]);
|
}
|
|
static void acm_unpoison_urbs(struct acm *acm)
|
{
|
int i;
|
|
for (i = 0; i < acm->rx_buflimit; i++)
|
usb_unpoison_urb(acm->read_urbs[i]);
|
for (i = 0; i < ACM_NW; i++)
|
usb_unpoison_urb(acm->wb[i].urb);
|
usb_unpoison_urb(acm->ctrlurb);
|
}
|
|
|
/*
|
* Write buffer management.
|
* All of these assume proper locks taken by the caller.
|
*/
|
|
static int acm_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 = true;
|
wb->len = 0;
|
return wbn;
|
}
|
wbn = (wbn + 1) % ACM_NW;
|
if (++i >= ACM_NW)
|
return -1;
|
}
|
}
|
|
static int acm_wb_is_avail(struct acm *acm)
|
{
|
int i, n;
|
unsigned long flags;
|
|
n = ACM_NW;
|
spin_lock_irqsave(&acm->write_lock, flags);
|
for (i = 0; i < ACM_NW; i++)
|
if(acm->wb[i].use)
|
n--;
|
spin_unlock_irqrestore(&acm->write_lock, flags);
|
return n;
|
}
|
|
/*
|
* Finish write. Caller must hold acm->write_lock
|
*/
|
static void acm_write_done(struct acm *acm, struct acm_wb *wb)
|
{
|
wb->use = false;
|
acm->transmitting--;
|
usb_autopm_put_interface_async(acm->control);
|
}
|
|
/*
|
* Poke write.
|
*
|
* the caller is responsible for locking
|
*/
|
|
static int acm_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) {
|
if (rc != -EPERM)
|
dev_err(&acm->data->dev,
|
"%s - usb_submit_urb(write bulk) failed: %d\n",
|
__func__, rc);
|
acm_write_done(acm, wb);
|
}
|
return rc;
|
}
|
|
/*
|
* attributes exported through sysfs
|
*/
|
static ssize_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);
|
|
return sprintf(buf, "%d", acm->ctrl_caps);
|
}
|
static DEVICE_ATTR_RO(bmCapabilities);
|
|
static ssize_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;
|
}
|
|
static DEVICE_ATTR_RO(wCountryCodes);
|
|
static ssize_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);
|
|
return sprintf(buf, "%d", acm->country_rel_date);
|
}
|
|
static DEVICE_ATTR_RO(iCountryCodeRelDate);
|
/*
|
* Interrupt handlers for various ACM device responses
|
*/
|
|
static void acm_process_notification(struct acm *acm, unsigned char *buf)
|
{
|
int newctrl;
|
int difference;
|
unsigned long flags;
|
struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf;
|
unsigned char *data = buf + sizeof(struct usb_cdc_notification);
|
|
switch (dr->bNotificationType) {
|
case USB_CDC_NOTIFY_NETWORK_CONNECTION:
|
dev_dbg(&acm->control->dev,
|
"%s - network connection: %d\n", __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 state\n", __func__);
|
break;
|
}
|
|
newctrl = get_unaligned_le16(data);
|
dev_dbg(&acm->control->dev,
|
"%s - serial state: 0x%x\n", __func__, newctrl);
|
|
if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
|
dev_dbg(&acm->control->dev,
|
"%s - calling hangup\n", __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++;
|
tty_insert_flip_char(&acm->port, 0, TTY_BREAK);
|
}
|
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 (newctrl & ACM_CTRL_BRK)
|
tty_flip_buffer_push(&acm->port);
|
|
if (difference)
|
wake_up_all(&acm->wioctl);
|
|
break;
|
|
default:
|
dev_dbg(&acm->control->dev,
|
"%s - unknown notification %d received: index %d len %d\n",
|
__func__,
|
dr->bNotificationType, dr->wIndex, dr->wLength);
|
}
|
}
|
|
/* control interface reports status changes with "interrupt" transfers */
|
static void acm_ctrl_irq(struct urb *urb)
|
{
|
struct acm *acm = urb->context;
|
struct usb_cdc_notification *dr = urb->transfer_buffer;
|
unsigned int current_size = urb->actual_length;
|
unsigned int expected_size, copy_size, alloc_size;
|
int retval;
|
int status = urb->status;
|
|
switch (status) {
|
case 0:
|
/* 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: %d\n",
|
__func__, status);
|
return;
|
default:
|
dev_dbg(&acm->control->dev,
|
"%s - nonzero urb status received: %d\n",
|
__func__, status);
|
goto exit;
|
}
|
|
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) {
|
u8 *new_buffer;
|
alloc_size = roundup_pow_of_two(expected_size);
|
/* Final freeing is done on disconnect. */
|
new_buffer = krealloc(acm->notification_buffer,
|
alloc_size, GFP_ATOMIC);
|
if (!new_buffer) {
|
acm->nb_index = 0;
|
goto exit;
|
}
|
|
acm->notification_buffer = new_buffer;
|
acm->nb_size = alloc_size;
|
dr = (struct usb_cdc_notification *)acm->notification_buffer;
|
}
|
|
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, (unsigned char *)dr);
|
acm->nb_index = 0;
|
}
|
|
exit:
|
retval = usb_submit_urb(urb, GFP_ATOMIC);
|
if (retval && retval != -EPERM && retval != -ENODEV)
|
dev_err(&acm->control->dev,
|
"%s - usb_submit_urb failed: %d\n", __func__, retval);
|
else
|
dev_vdbg(&acm->control->dev,
|
"control resubmission terminated %d\n", retval);
|
}
|
|
static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
|
{
|
int res;
|
|
if (!test_and_clear_bit(index, &acm->read_urbs_free))
|
return 0;
|
|
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 %d\n",
|
index, res);
|
} else {
|
dev_vdbg(&acm->data->dev, "intended failure %d\n", res);
|
}
|
set_bit(index, &acm->read_urbs_free);
|
return res;
|
} else {
|
dev_vdbg(&acm->data->dev, "submitted urb %d\n", index);
|
}
|
|
return 0;
|
}
|
|
static int acm_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;
|
}
|
|
return 0;
|
}
|
|
static void acm_process_read_urb(struct acm *acm, struct urb *urb)
|
{
|
unsigned long flags;
|
|
if (!urb->actual_length)
|
return;
|
|
spin_lock_irqsave(&acm->read_lock, flags);
|
tty_insert_flip_string(&acm->port, urb->transfer_buffer,
|
urb->actual_length);
|
spin_unlock_irqrestore(&acm->read_lock, flags);
|
|
tty_flip_buffer_push(&acm->port);
|
}
|
|
static void acm_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;
|
bool cooldown = false;
|
|
dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n",
|
rb->index, urb->actual_length, status);
|
|
switch (status) {
|
case 0:
|
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: %d\n",
|
__func__, status);
|
stopped = true;
|
break;
|
case -EOVERFLOW:
|
case -EPROTO:
|
dev_dbg(&acm->data->dev,
|
"%s - cooling babbling device\n", __func__);
|
usb_mark_last_busy(acm->dev);
|
set_bit(rb->index, &acm->urbs_in_error_delay);
|
set_bit(ACM_ERROR_DELAY, &acm->flags);
|
cooldown = true;
|
break;
|
default:
|
dev_dbg(&acm->data->dev,
|
"%s - nonzero urb status received: %d\n",
|
__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 || cooldown) {
|
if (stalled)
|
schedule_delayed_work(&acm->dwork, 0);
|
else if (cooldown)
|
schedule_delayed_work(&acm->dwork, HZ / 2);
|
return;
|
}
|
|
if (test_bit(ACM_THROTTLED, &acm->flags))
|
return;
|
|
acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
|
}
|
|
/* data interface wrote those outgoing bytes */
|
static void acm_write_bulk(struct urb *urb)
|
{
|
struct acm_wb *wb = urb->context;
|
struct acm *acm = wb->instance;
|
unsigned long flags;
|
int status = urb->status;
|
|
if (status || (urb->actual_length != urb->transfer_buffer_length))
|
dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n",
|
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_delayed_work(&acm->dwork, 0);
|
}
|
|
static void acm_softint(struct work_struct *work)
|
{
|
int i;
|
struct acm *acm = container_of(work, struct acm, dwork.work);
|
|
if (test_bit(EVENT_RX_STALL, &acm->flags)) {
|
smp_mb(); /* against acm_suspend() */
|
if (!acm->susp_count) {
|
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);
|
clear_bit(EVENT_RX_STALL, &acm->flags);
|
}
|
}
|
|
if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) {
|
for (i = 0; i < acm->rx_buflimit; i++)
|
if (test_and_clear_bit(i, &acm->urbs_in_error_delay))
|
acm_submit_read_urb(acm, i, GFP_KERNEL);
|
}
|
|
if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags))
|
tty_port_tty_wakeup(&acm->port);
|
}
|
|
/*
|
* TTY handlers
|
*/
|
|
static int acm_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;
|
|
return 0;
|
|
error_init_termios:
|
tty_port_put(&acm->port);
|
return retval;
|
}
|
|
static int acm_tty_open(struct tty_struct *tty, struct file *filp)
|
{
|
struct acm *acm = tty->driver_data;
|
|
return tty_port_open(&acm->port, tty, filp);
|
}
|
|
static void acm_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))
|
/* This is broken in too many devices to spam the logs */
|
dev_dbg(&acm->control->dev, "failed to set dtr/rts\n");
|
}
|
|
static int acm_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) failed\n", __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);
|
|
return 0;
|
|
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);
|
|
return usb_translate_errors(retval);
|
}
|
|
static void acm_port_destruct(struct tty_port *port)
|
{
|
struct acm *acm = container_of(port, struct acm, port);
|
|
if (acm->minor != ACM_MINOR_INVALID)
|
acm_release_minor(acm);
|
usb_put_intf(acm->control);
|
kfree(acm->country_codes);
|
kfree(acm);
|
}
|
|
static void acm_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.
|
*/
|
acm_poison_urbs(acm);
|
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 = false;
|
usb_autopm_put_interface_async(acm->control);
|
}
|
|
acm_unpoison_urbs(acm);
|
|
}
|
|
static void acm_tty_cleanup(struct tty_struct *tty)
|
{
|
struct acm *acm = tty->driver_data;
|
|
tty_port_put(&acm->port);
|
}
|
|
static void acm_tty_hangup(struct tty_struct *tty)
|
{
|
struct acm *acm = tty->driver_data;
|
|
tty_port_hangup(&acm->port);
|
}
|
|
static void acm_tty_close(struct tty_struct *tty, struct file *filp)
|
{
|
struct acm *acm = tty->driver_data;
|
|
tty_port_close(&acm->port, tty, filp);
|
}
|
|
static int acm_tty_write(struct tty_struct *tty,
|
const unsigned char *buf, int count)
|
{
|
struct acm *acm = tty->driver_data;
|
int stat;
|
unsigned long flags;
|
int wbn;
|
struct acm_wb *wb;
|
|
if (!count)
|
return 0;
|
|
dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count);
|
|
spin_lock_irqsave(&acm->write_lock, flags);
|
wbn = acm_wb_alloc(acm);
|
if (wbn < 0) {
|
spin_unlock_irqrestore(&acm->write_lock, flags);
|
return 0;
|
}
|
wb = &acm->wb[wbn];
|
|
if (!acm->dev) {
|
wb->use = false;
|
spin_unlock_irqrestore(&acm->write_lock, flags);
|
return -ENODEV;
|
}
|
|
count = (count > acm->writesize) ? acm->writesize : count;
|
dev_vdbg(&acm->data->dev, "writing %d bytes\n", count);
|
memcpy(wb->buf, buf, count);
|
wb->len = count;
|
|
stat = usb_autopm_get_interface_async(acm->control);
|
if (stat) {
|
wb->use = false;
|
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;
|
}
|
|
static int acm_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.
|
*/
|
return acm_wb_is_avail(acm) ? acm->writesize : 0;
|
}
|
|
static int acm_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)
|
return 0;
|
/*
|
* This is inaccurate (overcounts), but it works.
|
*/
|
return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
|
}
|
|
static void acm_tty_throttle(struct tty_struct *tty)
|
{
|
struct acm *acm = tty->driver_data;
|
|
set_bit(ACM_THROTTLED, &acm->flags);
|
}
|
|
static void acm_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);
|
}
|
|
static int acm_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 failed\n", __func__);
|
return retval;
|
}
|
|
static int acm_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;
|
}
|
|
static int acm_tty_tiocmset(struct tty_struct *tty,
|
unsigned int set, unsigned int clear)
|
{
|
struct acm *acm = tty->driver_data;
|
unsigned int 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)
|
return 0;
|
return acm_set_control(acm, acm->ctrlout = newctrl);
|
}
|
|
static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss)
|
{
|
struct acm *acm = tty->driver_data;
|
|
ss->line = acm->minor;
|
ss->close_delay = jiffies_to_msecs(acm->port.close_delay) / 10;
|
ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
|
ASYNC_CLOSING_WAIT_NONE :
|
jiffies_to_msecs(acm->port.closing_wait) / 10;
|
return 0;
|
}
|
|
static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss)
|
{
|
struct acm *acm = tty->driver_data;
|
unsigned int closing_wait, close_delay;
|
int retval = 0;
|
|
close_delay = msecs_to_jiffies(ss->close_delay * 10);
|
closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ?
|
ASYNC_CLOSING_WAIT_NONE :
|
msecs_to_jiffies(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 {
|
acm->port.close_delay = close_delay;
|
acm->port.closing_wait = closing_wait;
|
}
|
|
mutex_unlock(&acm->port.mutex);
|
return retval;
|
}
|
|
static int wait_serial_change(struct acm *acm, unsigned long 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;
|
}
|
|
static int acm_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;
|
|
return 0;
|
}
|
|
static int acm_tty_ioctl(struct tty_struct *tty,
|
unsigned int cmd, unsigned long 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;
|
}
|
|
static void acm_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;
|
} else if (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 %d\n",
|
__func__,
|
le32_to_cpu(newline.dwDTERate),
|
newline.bCharFormat, newline.bParityType,
|
newline.bDataBits);
|
acm_set_line(acm, &acm->line);
|
}
|
}
|
|
static const struct 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 */
|
static void acm_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);
|
}
|
|
static void acm_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 */
|
static int acm_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;
|
}
|
}
|
return 0;
|
}
|
|
static int acm_probe(struct usb_interface *intf,
|
const struct usb_device_id *id)
|
{
|
struct usb_cdc_union_desc *union_header = NULL;
|
struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL;
|
unsigned char *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;
|
int minor;
|
int ctrlsize, readsize;
|
u8 *buf;
|
int call_intf_num = -1;
|
int data_intf_num = -1;
|
unsigned long quirks;
|
int num_rx_buf;
|
int i;
|
int combined_interfaces = 0;
|
struct device *tty_dev;
|
int rv = -ENOMEM;
|
int res;
|
|
/* normal quirks */
|
quirks = (unsigned long)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 references\n");
|
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 endpoint\n");
|
buflen = intf->cur_altsetting->endpoint->extralen;
|
buffer = intf->cur_altsetting->endpoint->extra;
|
} else {
|
dev_err(&intf->dev,
|
"Zero length descriptor references\n");
|
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 (intf->cur_altsetting->desc.bNumEndpoints == 3) {
|
dev_dbg(&intf->dev, "No union descriptor, assuming single interface\n");
|
combined_interfaces = 1;
|
control_interface = data_interface = intf;
|
goto look_for_collapsed_interface;
|
} else if (call_intf_num > 0) {
|
dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
|
data_intf_num = call_intf_num;
|
data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
|
control_interface = intf;
|
} else {
|
dev_dbg(&intf->dev, "No union descriptor, giving up\n");
|
return -ENODEV;
|
}
|
} else {
|
int class = -1;
|
|
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)
|
class = control_interface->cur_altsetting->desc.bInterfaceClass;
|
|
if (class != USB_CLASS_COMM && class != USB_CLASS_CDC_DATA) {
|
dev_dbg(&intf->dev, "Broken union descriptor, assuming single interface\n");
|
combined_interfaces = 1;
|
control_interface = data_interface = intf;
|
goto look_for_collapsed_interface;
|
}
|
}
|
|
if (!control_interface || !data_interface) {
|
dev_dbg(&intf->dev, "no interfaces\n");
|
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 endpoints\n");
|
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 != USB_CLASS_CDC_DATA) {
|
if (control_interface->cur_altsetting->desc.bInterfaceClass == USB_CLASS_CDC_DATA) {
|
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 available\n");
|
return -EBUSY;
|
}
|
|
|
if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
|
control_interface->cur_altsetting->desc.bNumEndpoints == 0)
|
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 endpoints\n");
|
swap(epread, epwrite);
|
}
|
made_compressed_probe:
|
dev_dbg(&intf->dev, "interfaces are valid\n");
|
|
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) {
|
acm->minor = ACM_MINOR_INVALID;
|
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_DELAYED_WORK(&acm->dwork, 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->urb == NULL)
|
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 device\n", 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);
|
}
|
|
return 0;
|
alloc_fail6:
|
if (!acm->combined_interfaces) {
|
/* Clear driver data so that disconnect() returns early. */
|
usb_set_intfdata(data_interface, NULL);
|
usb_driver_release_interface(&acm_driver, data_interface);
|
}
|
if (acm->country_codes) {
|
device_remove_file(&acm->control->dev,
|
&dev_attr_wCountryCodes);
|
device_remove_file(&acm->control->dev,
|
&dev_attr_iCountryCodeRelDate);
|
}
|
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;
|
}
|
|
static void acm_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;
|
|
acm->disconnected = true;
|
/*
|
* there is a circular dependency. acm_softint() can resubmit
|
* the URBs in error handling so we need to block any
|
* submission right away
|
*/
|
acm_poison_urbs(acm);
|
mutex_lock(&acm->mutex);
|
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);
|
}
|
|
cancel_delayed_work_sync(&acm->dwork);
|
|
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
|
static int acm_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)
|
return 0;
|
|
acm_poison_urbs(acm);
|
cancel_delayed_work_sync(&acm->dwork);
|
acm->urbs_in_error_delay = 0;
|
|
return 0;
|
}
|
|
static int acm_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;
|
|
acm_unpoison_urbs(acm);
|
|
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;
|
}
|
|
static int acm_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);
|
|
return acm_resume(intf);
|
}
|
|
#endif /* CONFIG_PM */
|
|
static int acm_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 */
|
|
return 0;
|
}
|
|
#define NOKIA_PCSUITE_ACM_INFO(x) \
|
USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
|
USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
|
USB_CDC_ACM_PROTO_VENDOR)
|
|
#define SAMSUNG_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(0x0424, 0x274e), /* Microchip Technology, Inc. (formerly SMSC) */
|
.driver_info = DISABLE_ECHO, }, /* DISABLE ECHO in termios flag */
|
{ 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(0x045b, 0x023c), /* Renesas USB Download mode */
|
.driver_info = DISABLE_ECHO, /* Don't echo banner */
|
},
|
{ USB_DEVICE(0x045b, 0x0248), /* Renesas USB Download mode */
|
.driver_info = DISABLE_ECHO, /* Don't echo banner */
|
},
|
{ USB_DEVICE(0x045b, 0x024D), /* Renesas USB Download mode */
|
.driver_info = DISABLE_ECHO, /* Don't echo banner */
|
},
|
{ 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(0x0c26, 0x0020), /* Icom ICF3400 Serie */
|
.driver_info = NO_UNION_NORMAL, /* reports zero length 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! */
|
|
#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
|
|
#if IS_ENABLED(CONFIG_IR_TOY)
|
{ USB_DEVICE(0x04d8, 0xfd08),
|
.driver_info = IGNORE_DEVICE,
|
},
|
|
{ USB_DEVICE(0x04d8, 0xf58b),
|
.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,
|
},
|
|
/* Exclude ETAS ES58x */
|
{ USB_DEVICE(0x108c, 0x0159), /* ES581.4 */
|
.driver_info = IGNORE_DEVICE,
|
},
|
{ USB_DEVICE(0x108c, 0x0168), /* ES582.1 */
|
.driver_info = IGNORE_DEVICE,
|
},
|
{ USB_DEVICE(0x108c, 0x0169), /* ES584.1 */
|
.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,
|
},
|
|
/* Exclude Goodix Fingerprint Reader */
|
{ USB_DEVICE(0x27c6, 0x5395),
|
.driver_info = IGNORE_DEVICE,
|
},
|
|
/* Exclude Heimann Sensor GmbH USB appset demo */
|
{ USB_DEVICE(0x32a7, 0x0000),
|
.driver_info = IGNORE_DEVICE,
|
},
|
|
/* 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);
|
|
static struct 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.
|
*/
|
|
static const struct 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.
|
*/
|
|
static int __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");
|
|
return 0;
|
}
|
|
static void __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);
|
