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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/usb/class/cdc-acm.c
parentInitial commit. (diff)
downloadlinux-upstream.tar.xz
linux-upstream.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/usb/class/cdc-acm.c')
-rw-r--r--drivers/usb/class/cdc-acm.c2089
1 files changed, 2089 insertions, 0 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
new file mode 100644
index 000000000..2a7eea4e2
--- /dev/null
+++ b/drivers/usb/class/cdc-acm.c
@@ -0,0 +1,2089 @@
+// 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"
+
+
+#define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
+#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,
+ const 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, USB_CTRL_SET_TIMEOUT);
+
+ 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 & USB_CDC_SERIAL_STATE_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 & USB_CDC_SERIAL_STATE_DSR)
+ acm->iocount.dsr++;
+ if (difference & USB_CDC_SERIAL_STATE_DCD)
+ acm->iocount.dcd++;
+ if (newctrl & USB_CDC_SERIAL_STATE_BREAK) {
+ acm->iocount.brk++;
+ tty_insert_flip_char(&acm->port, 0, TTY_BREAK);
+ }
+ if (newctrl & USB_CDC_SERIAL_STATE_RING_SIGNAL)
+ acm->iocount.rng++;
+ if (newctrl & USB_CDC_SERIAL_STATE_FRAMING)
+ acm->iocount.frame++;
+ if (newctrl & USB_CDC_SERIAL_STATE_PARITY)
+ acm->iocount.parity++;
+ if (newctrl & USB_CDC_SERIAL_STATE_OVERRUN)
+ acm->iocount.overrun++;
+ spin_unlock_irqrestore(&acm->read_lock, flags);
+
+ if (newctrl & USB_CDC_SERIAL_STATE_BREAK)
+ 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 = USB_CDC_CTRL_DTR | USB_CDC_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;
+
+ 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 unsigned 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 unsigned 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;
+
+ if (!(acm->ctrl_caps & USB_CDC_CAP_BRK))
+ return -EOPNOTSUPP;
+
+ 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 & USB_CDC_CTRL_DTR ? TIOCM_DTR : 0) |
+ (acm->ctrlout & USB_CDC_CTRL_RTS ? TIOCM_RTS : 0) |
+ (acm->ctrlin & USB_CDC_SERIAL_STATE_DSR ? TIOCM_DSR : 0) |
+ (acm->ctrlin & USB_CDC_SERIAL_STATE_RING_SIGNAL ? TIOCM_RI : 0) |
+ (acm->ctrlin & USB_CDC_SERIAL_STATE_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 ? USB_CDC_CTRL_DTR : 0) |
+ (set & TIOCM_RTS ? USB_CDC_CTRL_RTS : 0);
+ clear = (clear & TIOCM_DTR ? USB_CDC_CTRL_DTR : 0) |
+ (clear & TIOCM_RTS ? USB_CDC_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,
+ const 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;
+ newline.bDataBits = tty_get_char_size(termios->c_cflag);
+
+ /* 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 &= ~USB_CDC_CTRL_DTR;
+ } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
+ newctrl |= USB_CDC_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 (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)
+ return -ENOMEM;
+
+ 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 err_put_port;
+ }
+
+ 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 err_put_port;
+ acm->ctrl_buffer = buf;
+
+ if (acm_write_buffers_alloc(acm) < 0)
+ goto err_free_ctrl_buffer;
+
+ acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!acm->ctrlurb)
+ goto err_free_write_buffers;
+
+ 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 err_free_read_urbs;
+ rb->index = i;
+ rb->instance = acm;
+
+ urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!urb)
+ goto err_free_read_urbs;
+
+ 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)
+ goto err_free_write_urbs;
+
+ 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 err_free_write_urbs;
+
+ 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;
+
+ acm->line.dwDTERate = cpu_to_le32(9600);
+ acm->line.bDataBits = 8;
+ acm_set_line(acm, &acm->line);
+
+ if (!acm->combined_interfaces) {
+ rv = usb_driver_claim_interface(&acm_driver, data_interface, acm);
+ if (rv)
+ goto err_remove_files;
+ }
+
+ 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 err_release_data_interface;
+ }
+
+ if (quirks & CLEAR_HALT_CONDITIONS) {
+ usb_clear_halt(usb_dev, acm->in);
+ usb_clear_halt(usb_dev, acm->out);
+ }
+
+ dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
+
+ return 0;
+
+err_release_data_interface:
+ 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);
+ }
+err_remove_files:
+ 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);
+err_free_write_urbs:
+ for (i = 0; i < ACM_NW; i++)
+ usb_free_urb(acm->wb[i].urb);
+err_free_read_urbs:
+ 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);
+err_free_write_buffers:
+ acm_write_buffers_free(acm);
+err_free_ctrl_buffer:
+ usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
+err_put_port:
+ tty_port_put(&acm->port);
+
+ 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(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
+
+#if IS_ENABLED(CONFIG_USB_SERIAL_XR)
+ { USB_DEVICE(0x04e2, 0x1400), .driver_info = IGNORE_DEVICE },
+ { USB_DEVICE(0x04e2, 0x1401), .driver_info = IGNORE_DEVICE },
+ { USB_DEVICE(0x04e2, 0x1402), .driver_info = IGNORE_DEVICE },
+ { USB_DEVICE(0x04e2, 0x1403), .driver_info = IGNORE_DEVICE },
+ { USB_DEVICE(0x04e2, 0x1410), .driver_info = IGNORE_DEVICE },
+ { USB_DEVICE(0x04e2, 0x1411), .driver_info = IGNORE_DEVICE },
+ { USB_DEVICE(0x04e2, 0x1412), .driver_info = IGNORE_DEVICE },
+ { USB_DEVICE(0x04e2, 0x1414), .driver_info = IGNORE_DEVICE },
+ { USB_DEVICE(0x04e2, 0x1420), .driver_info = IGNORE_DEVICE },
+ { USB_DEVICE(0x04e2, 0x1422), .driver_info = IGNORE_DEVICE },
+ { USB_DEVICE(0x04e2, 0x1424), .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 = tty_alloc_driver(ACM_TTY_MINORS, TTY_DRIVER_REAL_RAW |
+ TTY_DRIVER_DYNAMIC_DEV);
+ if (IS_ERR(acm_tty_driver))
+ return PTR_ERR(acm_tty_driver);
+ 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->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) {
+ tty_driver_kref_put(acm_tty_driver);
+ return retval;
+ }
+
+ retval = usb_register(&acm_driver);
+ if (retval) {
+ tty_unregister_driver(acm_tty_driver);
+ tty_driver_kref_put(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);
+ tty_driver_kref_put(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);