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3b59d16c51
Signed-off-by: David Cluytens <david.cluytens@gmail.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1794 lines
48 KiB
C
1794 lines
48 KiB
C
/*
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* cdc-acm.c
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*
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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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*
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* Sponsored by SuSE
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#undef DEBUG
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#undef VERBOSE_DEBUG
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#include <linux/kernel.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/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/list.h>
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#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"
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static struct usb_driver acm_driver;
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static struct tty_driver *acm_tty_driver;
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static struct acm *acm_table[ACM_TTY_MINORS];
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static DEFINE_MUTEX(acm_table_lock);
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/*
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* acm_table accessors
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*/
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/*
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* Look up an ACM structure by index. If found and not disconnected, increment
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* its refcount and return it with its mutex held.
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*/
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static struct acm *acm_get_by_index(unsigned index)
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{
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struct acm *acm;
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mutex_lock(&acm_table_lock);
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acm = acm_table[index];
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if (acm) {
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mutex_lock(&acm->mutex);
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if (acm->disconnected) {
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mutex_unlock(&acm->mutex);
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acm = NULL;
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} else {
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tty_port_get(&acm->port);
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mutex_unlock(&acm->mutex);
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}
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}
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mutex_unlock(&acm_table_lock);
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return acm;
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}
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/*
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* Try to find an available minor number and if found, associate it with 'acm'.
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*/
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static int acm_alloc_minor(struct acm *acm)
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{
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int minor;
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mutex_lock(&acm_table_lock);
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for (minor = 0; minor < ACM_TTY_MINORS; minor++) {
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if (!acm_table[minor]) {
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acm_table[minor] = acm;
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break;
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}
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}
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mutex_unlock(&acm_table_lock);
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return minor;
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}
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/* Release the minor number associated with 'acm'. */
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static void acm_release_minor(struct acm *acm)
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{
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mutex_lock(&acm_table_lock);
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acm_table[acm->minor] = NULL;
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mutex_unlock(&acm_table_lock);
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}
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/*
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* Functions for ACM control messages.
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*/
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static int acm_ctrl_msg(struct acm *acm, int request, int value,
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void *buf, int len)
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{
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int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
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request, USB_RT_ACM, value,
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acm->control->altsetting[0].desc.bInterfaceNumber,
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buf, len, 5000);
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dev_dbg(&acm->control->dev,
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"%s - rq 0x%02x, val %#x, len %#x, result %d\n",
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__func__, request, value, len, retval);
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return retval < 0 ? retval : 0;
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}
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/* devices aren't required to support these requests.
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* the cdc acm descriptor tells whether they do...
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*/
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#define acm_set_control(acm, control) \
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acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0)
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#define acm_set_line(acm, line) \
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acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
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#define acm_send_break(acm, ms) \
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acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
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/*
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* Write buffer management.
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* All of these assume proper locks taken by the caller.
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*/
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static int acm_wb_alloc(struct acm *acm)
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{
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int i, wbn;
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struct acm_wb *wb;
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wbn = 0;
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i = 0;
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for (;;) {
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wb = &acm->wb[wbn];
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if (!wb->use) {
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wb->use = 1;
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return wbn;
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}
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wbn = (wbn + 1) % ACM_NW;
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if (++i >= ACM_NW)
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return -1;
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}
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}
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static int acm_wb_is_avail(struct acm *acm)
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{
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int i, n;
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unsigned long flags;
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n = ACM_NW;
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spin_lock_irqsave(&acm->write_lock, flags);
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for (i = 0; i < ACM_NW; i++)
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n -= acm->wb[i].use;
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spin_unlock_irqrestore(&acm->write_lock, flags);
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return n;
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}
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/*
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* Finish write. Caller must hold acm->write_lock
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*/
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static void acm_write_done(struct acm *acm, struct acm_wb *wb)
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{
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wb->use = 0;
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acm->transmitting--;
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usb_autopm_put_interface_async(acm->control);
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}
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/*
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* Poke write.
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*
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* the caller is responsible for locking
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*/
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static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
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{
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int rc;
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acm->transmitting++;
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wb->urb->transfer_buffer = wb->buf;
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wb->urb->transfer_dma = wb->dmah;
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wb->urb->transfer_buffer_length = wb->len;
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wb->urb->dev = acm->dev;
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rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
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if (rc < 0) {
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dev_err(&acm->data->dev,
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"%s - usb_submit_urb(write bulk) failed: %d\n",
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__func__, rc);
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acm_write_done(acm, wb);
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}
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return rc;
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}
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/*
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* attributes exported through sysfs
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*/
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static ssize_t show_caps
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(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_interface *intf = to_usb_interface(dev);
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struct acm *acm = usb_get_intfdata(intf);
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return sprintf(buf, "%d", acm->ctrl_caps);
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}
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static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
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static ssize_t show_country_codes
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(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_interface *intf = to_usb_interface(dev);
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struct acm *acm = usb_get_intfdata(intf);
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memcpy(buf, acm->country_codes, acm->country_code_size);
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return acm->country_code_size;
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}
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static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
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static ssize_t show_country_rel_date
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(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_interface *intf = to_usb_interface(dev);
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struct acm *acm = usb_get_intfdata(intf);
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return sprintf(buf, "%d", acm->country_rel_date);
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}
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static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
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/*
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* Interrupt handlers for various ACM device responses
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*/
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/* control interface reports status changes with "interrupt" transfers */
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static void acm_ctrl_irq(struct urb *urb)
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{
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struct acm *acm = urb->context;
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struct usb_cdc_notification *dr = urb->transfer_buffer;
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unsigned char *data;
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int newctrl;
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int retval;
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int status = urb->status;
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switch (status) {
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case 0:
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/* success */
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break;
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case -ECONNRESET:
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case -ENOENT:
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case -ESHUTDOWN:
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/* this urb is terminated, clean up */
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dev_dbg(&acm->control->dev,
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"%s - urb shutting down with status: %d\n",
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__func__, status);
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return;
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default:
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dev_dbg(&acm->control->dev,
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"%s - nonzero urb status received: %d\n",
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__func__, status);
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goto exit;
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}
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usb_mark_last_busy(acm->dev);
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data = (unsigned char *)(dr + 1);
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switch (dr->bNotificationType) {
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case USB_CDC_NOTIFY_NETWORK_CONNECTION:
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dev_dbg(&acm->control->dev, "%s - network connection: %d\n",
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__func__, dr->wValue);
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break;
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case USB_CDC_NOTIFY_SERIAL_STATE:
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newctrl = get_unaligned_le16(data);
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if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
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dev_dbg(&acm->control->dev, "%s - calling hangup\n",
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__func__);
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tty_port_tty_hangup(&acm->port, false);
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}
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acm->ctrlin = newctrl;
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dev_dbg(&acm->control->dev,
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"%s - input control lines: dcd%c dsr%c break%c "
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"ring%c framing%c parity%c overrun%c\n",
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__func__,
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acm->ctrlin & ACM_CTRL_DCD ? '+' : '-',
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acm->ctrlin & ACM_CTRL_DSR ? '+' : '-',
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acm->ctrlin & ACM_CTRL_BRK ? '+' : '-',
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acm->ctrlin & ACM_CTRL_RI ? '+' : '-',
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acm->ctrlin & ACM_CTRL_FRAMING ? '+' : '-',
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acm->ctrlin & ACM_CTRL_PARITY ? '+' : '-',
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acm->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-');
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break;
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default:
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dev_dbg(&acm->control->dev,
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"%s - unknown notification %d received: index %d "
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"len %d data0 %d data1 %d\n",
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__func__,
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dr->bNotificationType, dr->wIndex,
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dr->wLength, data[0], data[1]);
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break;
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}
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exit:
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retval = usb_submit_urb(urb, GFP_ATOMIC);
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if (retval)
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dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n",
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__func__, retval);
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}
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static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
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{
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int res;
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if (!test_and_clear_bit(index, &acm->read_urbs_free))
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return 0;
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dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index);
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res = usb_submit_urb(acm->read_urbs[index], mem_flags);
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if (res) {
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if (res != -EPERM) {
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dev_err(&acm->data->dev,
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"%s - usb_submit_urb failed: %d\n",
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__func__, res);
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}
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set_bit(index, &acm->read_urbs_free);
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return res;
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}
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return 0;
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}
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static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
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{
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int res;
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int i;
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for (i = 0; i < acm->rx_buflimit; ++i) {
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res = acm_submit_read_urb(acm, i, mem_flags);
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if (res)
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return res;
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}
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return 0;
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}
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static void acm_process_read_urb(struct acm *acm, struct urb *urb)
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{
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if (!urb->actual_length)
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return;
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tty_insert_flip_string(&acm->port, urb->transfer_buffer,
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urb->actual_length);
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tty_flip_buffer_push(&acm->port);
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}
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static void acm_read_bulk_callback(struct urb *urb)
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{
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struct acm_rb *rb = urb->context;
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struct acm *acm = rb->instance;
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unsigned long flags;
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dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__,
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rb->index, urb->actual_length);
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set_bit(rb->index, &acm->read_urbs_free);
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if (!acm->dev) {
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dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
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return;
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}
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usb_mark_last_busy(acm->dev);
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|
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if (urb->status) {
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dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n",
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__func__, urb->status);
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return;
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}
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acm_process_read_urb(acm, urb);
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|
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/* throttle device if requested by tty */
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spin_lock_irqsave(&acm->read_lock, flags);
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acm->throttled = acm->throttle_req;
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if (!acm->throttled && !acm->susp_count) {
|
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spin_unlock_irqrestore(&acm->read_lock, flags);
|
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acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
|
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} else {
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spin_unlock_irqrestore(&acm->read_lock, flags);
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}
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}
|
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|
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/* data interface wrote those outgoing bytes */
|
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static void acm_write_bulk(struct urb *urb)
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{
|
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struct acm_wb *wb = urb->context;
|
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struct acm *acm = wb->instance;
|
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unsigned long flags;
|
|
|
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if (urb->status || (urb->actual_length != urb->transfer_buffer_length))
|
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dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n",
|
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__func__,
|
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urb->actual_length,
|
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urb->transfer_buffer_length,
|
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urb->status);
|
|
|
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spin_lock_irqsave(&acm->write_lock, flags);
|
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acm_write_done(acm, wb);
|
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spin_unlock_irqrestore(&acm->write_lock, flags);
|
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schedule_work(&acm->work);
|
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}
|
|
|
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static void acm_softint(struct work_struct *work)
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{
|
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struct acm *acm = container_of(work, struct acm, work);
|
|
|
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dev_vdbg(&acm->data->dev, "%s\n", __func__);
|
|
|
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tty_port_tty_wakeup(&acm->port);
|
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}
|
|
|
|
/*
|
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* TTY handlers
|
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*/
|
|
|
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static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
|
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{
|
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struct acm *acm;
|
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int retval;
|
|
|
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dev_dbg(tty->dev, "%s\n", __func__);
|
|
|
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acm = acm_get_by_index(tty->index);
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if (!acm)
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return -ENODEV;
|
|
|
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retval = tty_standard_install(driver, tty);
|
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if (retval)
|
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goto error_init_termios;
|
|
|
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tty->driver_data = acm;
|
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|
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return 0;
|
|
|
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error_init_termios:
|
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tty_port_put(&acm->port);
|
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return retval;
|
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}
|
|
|
|
static int acm_tty_open(struct tty_struct *tty, struct file *filp)
|
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{
|
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struct acm *acm = tty->driver_data;
|
|
|
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dev_dbg(tty->dev, "%s\n", __func__);
|
|
|
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return tty_port_open(&acm->port, tty, filp);
|
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}
|
|
|
|
static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
|
|
{
|
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struct acm *acm = container_of(port, struct acm, port);
|
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int retval = -ENODEV;
|
|
|
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dev_dbg(&acm->control->dev, "%s\n", __func__);
|
|
|
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mutex_lock(&acm->mutex);
|
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if (acm->disconnected)
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goto disconnected;
|
|
|
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retval = usb_autopm_get_interface(acm->control);
|
|
if (retval)
|
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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;
|
|
if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) {
|
|
dev_err(&acm->control->dev,
|
|
"%s - usb_submit_urb(ctrl irq) failed\n", __func__);
|
|
goto error_submit_urb;
|
|
}
|
|
|
|
acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS;
|
|
if (acm_set_control(acm, acm->ctrlout) < 0 &&
|
|
(acm->ctrl_caps & USB_CDC_CAP_LINE))
|
|
goto error_set_control;
|
|
|
|
usb_autopm_put_interface(acm->control);
|
|
|
|
/*
|
|
* Unthrottle device in case the TTY was closed while throttled.
|
|
*/
|
|
spin_lock_irq(&acm->read_lock);
|
|
acm->throttled = 0;
|
|
acm->throttle_req = 0;
|
|
spin_unlock_irq(&acm->read_lock);
|
|
|
|
if (acm_submit_read_urbs(acm, GFP_KERNEL))
|
|
goto error_submit_read_urbs;
|
|
|
|
mutex_unlock(&acm->mutex);
|
|
|
|
return 0;
|
|
|
|
error_submit_read_urbs:
|
|
acm->ctrlout = 0;
|
|
acm_set_control(acm, acm->ctrlout);
|
|
error_set_control:
|
|
usb_kill_urb(acm->ctrlurb);
|
|
error_submit_urb:
|
|
usb_autopm_put_interface(acm->control);
|
|
error_get_interface:
|
|
disconnected:
|
|
mutex_unlock(&acm->mutex);
|
|
return retval;
|
|
}
|
|
|
|
static void acm_port_destruct(struct tty_port *port)
|
|
{
|
|
struct acm *acm = container_of(port, struct acm, port);
|
|
|
|
dev_dbg(&acm->control->dev, "%s\n", __func__);
|
|
|
|
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);
|
|
int i;
|
|
|
|
dev_dbg(&acm->control->dev, "%s\n", __func__);
|
|
|
|
mutex_lock(&acm->mutex);
|
|
if (!acm->disconnected) {
|
|
usb_autopm_get_interface(acm->control);
|
|
acm_set_control(acm, acm->ctrlout = 0);
|
|
usb_kill_urb(acm->ctrlurb);
|
|
for (i = 0; i < ACM_NW; i++)
|
|
usb_kill_urb(acm->wb[i].urb);
|
|
for (i = 0; i < acm->rx_buflimit; i++)
|
|
usb_kill_urb(acm->read_urbs[i]);
|
|
acm->control->needs_remote_wakeup = 0;
|
|
usb_autopm_put_interface(acm->control);
|
|
}
|
|
mutex_unlock(&acm->mutex);
|
|
}
|
|
|
|
static void acm_tty_cleanup(struct tty_struct *tty)
|
|
{
|
|
struct acm *acm = tty->driver_data;
|
|
dev_dbg(&acm->control->dev, "%s\n", __func__);
|
|
tty_port_put(&acm->port);
|
|
}
|
|
|
|
static void acm_tty_hangup(struct tty_struct *tty)
|
|
{
|
|
struct acm *acm = tty->driver_data;
|
|
dev_dbg(&acm->control->dev, "%s\n", __func__);
|
|
tty_port_hangup(&acm->port);
|
|
}
|
|
|
|
static void acm_tty_close(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
struct acm *acm = tty->driver_data;
|
|
dev_dbg(&acm->control->dev, "%s\n", __func__);
|
|
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, "%s - count %d\n", __func__, 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 = 0;
|
|
spin_unlock_irqrestore(&acm->write_lock, flags);
|
|
return -ENODEV;
|
|
}
|
|
|
|
count = (count > acm->writesize) ? acm->writesize : count;
|
|
dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
|
|
memcpy(wb->buf, buf, count);
|
|
wb->len = count;
|
|
|
|
usb_autopm_get_interface_async(acm->control);
|
|
if (acm->susp_count) {
|
|
if (!acm->delayed_wb)
|
|
acm->delayed_wb = wb;
|
|
else
|
|
usb_autopm_put_interface_async(acm->control);
|
|
spin_unlock_irqrestore(&acm->write_lock, flags);
|
|
return count; /* A white lie */
|
|
}
|
|
usb_mark_last_busy(acm->dev);
|
|
|
|
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;
|
|
|
|
spin_lock_irq(&acm->read_lock);
|
|
acm->throttle_req = 1;
|
|
spin_unlock_irq(&acm->read_lock);
|
|
}
|
|
|
|
static void acm_tty_unthrottle(struct tty_struct *tty)
|
|
{
|
|
struct acm *acm = tty->driver_data;
|
|
unsigned int was_throttled;
|
|
|
|
spin_lock_irq(&acm->read_lock);
|
|
was_throttled = acm->throttled;
|
|
acm->throttled = 0;
|
|
acm->throttle_req = 0;
|
|
spin_unlock_irq(&acm->read_lock);
|
|
|
|
if (was_throttled)
|
|
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 acm *acm, struct serial_struct __user *info)
|
|
{
|
|
struct serial_struct tmp;
|
|
|
|
if (!info)
|
|
return -EINVAL;
|
|
|
|
memset(&tmp, 0, sizeof(tmp));
|
|
tmp.flags = ASYNC_LOW_LATENCY;
|
|
tmp.xmit_fifo_size = acm->writesize;
|
|
tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
|
|
tmp.close_delay = acm->port.close_delay / 10;
|
|
tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
|
|
ASYNC_CLOSING_WAIT_NONE :
|
|
acm->port.closing_wait / 10;
|
|
|
|
if (copy_to_user(info, &tmp, sizeof(tmp)))
|
|
return -EFAULT;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static int set_serial_info(struct acm *acm,
|
|
struct serial_struct __user *newinfo)
|
|
{
|
|
struct serial_struct new_serial;
|
|
unsigned int closing_wait, close_delay;
|
|
int retval = 0;
|
|
|
|
if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
|
|
return -EFAULT;
|
|
|
|
close_delay = new_serial.close_delay * 10;
|
|
closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
|
|
ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
|
|
|
|
mutex_lock(&acm->port.mutex);
|
|
|
|
if (!capable(CAP_SYS_ADMIN)) {
|
|
if ((close_delay != acm->port.close_delay) ||
|
|
(closing_wait != acm->port.closing_wait))
|
|
retval = -EPERM;
|
|
else
|
|
retval = -EOPNOTSUPP;
|
|
} else {
|
|
acm->port.close_delay = close_delay;
|
|
acm->port.closing_wait = closing_wait;
|
|
}
|
|
|
|
mutex_unlock(&acm->port.mutex);
|
|
return retval;
|
|
}
|
|
|
|
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 TIOCGSERIAL: /* gets serial port data */
|
|
rv = get_serial_info(acm, (struct serial_struct __user *) arg);
|
|
break;
|
|
case TIOCSSERIAL:
|
|
rv = set_serial_info(acm, (struct serial_struct __user *) arg);
|
|
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 (!newline.dwDTERate) {
|
|
newline.dwDTERate = acm->line.dwDTERate;
|
|
newctrl &= ~ACM_CTRL_DTR;
|
|
} else
|
|
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 = {
|
|
.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;
|
|
struct usb_device *usb_dev = interface_to_usbdev(acm->control);
|
|
|
|
for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
|
|
usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
|
|
}
|
|
|
|
static void acm_read_buffers_free(struct acm *acm)
|
|
{
|
|
struct usb_device *usb_dev = interface_to_usbdev(acm->control);
|
|
int i;
|
|
|
|
for (i = 0; i < acm->rx_buflimit; i++)
|
|
usb_free_coherent(usb_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_country_functional_desc *cfd = 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 acm *acm;
|
|
int minor;
|
|
int ctrlsize, readsize;
|
|
u8 *buf;
|
|
u8 ac_management_function = 0;
|
|
u8 call_management_function = 0;
|
|
int call_interface_num = -1;
|
|
int data_interface_num = -1;
|
|
unsigned long quirks;
|
|
int num_rx_buf;
|
|
int i;
|
|
int combined_interfaces = 0;
|
|
struct device *tty_dev;
|
|
int rv = -ENOMEM;
|
|
|
|
/* normal quirks */
|
|
quirks = (unsigned long)id->driver_info;
|
|
|
|
if (quirks == IGNORE_DEVICE)
|
|
return -ENODEV;
|
|
|
|
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);
|
|
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;
|
|
}
|
|
}
|
|
|
|
while (buflen > 0) {
|
|
if (buffer[1] != USB_DT_CS_INTERFACE) {
|
|
dev_err(&intf->dev, "skipping garbage\n");
|
|
goto next_desc;
|
|
}
|
|
|
|
switch (buffer[2]) {
|
|
case USB_CDC_UNION_TYPE: /* we've found it */
|
|
if (union_header) {
|
|
dev_err(&intf->dev, "More than one "
|
|
"union descriptor, skipping ...\n");
|
|
goto next_desc;
|
|
}
|
|
union_header = (struct usb_cdc_union_desc *)buffer;
|
|
break;
|
|
case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
|
|
cfd = (struct usb_cdc_country_functional_desc *)buffer;
|
|
break;
|
|
case USB_CDC_HEADER_TYPE: /* maybe check version */
|
|
break; /* for now we ignore it */
|
|
case USB_CDC_ACM_TYPE:
|
|
ac_management_function = buffer[3];
|
|
break;
|
|
case USB_CDC_CALL_MANAGEMENT_TYPE:
|
|
call_management_function = buffer[3];
|
|
call_interface_num = buffer[4];
|
|
if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
|
|
dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
|
|
break;
|
|
default:
|
|
/* there are LOTS more CDC descriptors that
|
|
* could legitimately be found here.
|
|
*/
|
|
dev_dbg(&intf->dev, "Ignoring descriptor: "
|
|
"type %02x, length %d\n",
|
|
buffer[2], buffer[0]);
|
|
break;
|
|
}
|
|
next_desc:
|
|
buflen -= buffer[0];
|
|
buffer += buffer[0];
|
|
}
|
|
|
|
if (!union_header) {
|
|
if (call_interface_num > 0) {
|
|
dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
|
|
/* quirks for Droids MuIn LCD */
|
|
if (quirks & NO_DATA_INTERFACE)
|
|
data_interface = usb_ifnum_to_if(usb_dev, 0);
|
|
else
|
|
data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
|
|
control_interface = intf;
|
|
} else {
|
|
if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
|
|
dev_dbg(&intf->dev,"No union descriptor, giving up\n");
|
|
return -ENODEV;
|
|
} else {
|
|
dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
|
|
combined_interfaces = 1;
|
|
control_interface = data_interface = intf;
|
|
goto look_for_collapsed_interface;
|
|
}
|
|
}
|
|
} else {
|
|
control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
|
|
data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
|
|
if (!control_interface || !data_interface) {
|
|
dev_dbg(&intf->dev, "no interfaces\n");
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
|
|
if (data_interface_num != call_interface_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:
|
|
for (i = 0; i < 3; i++) {
|
|
struct usb_endpoint_descriptor *ep;
|
|
ep = &data_interface->cur_altsetting->endpoint[i].desc;
|
|
|
|
if (usb_endpoint_is_int_in(ep))
|
|
epctrl = ep;
|
|
else if (usb_endpoint_is_bulk_out(ep))
|
|
epwrite = ep;
|
|
else if (usb_endpoint_is_bulk_in(ep))
|
|
epread = ep;
|
|
else
|
|
return -EINVAL;
|
|
}
|
|
if (!epctrl || !epread || !epwrite)
|
|
return -ENODEV;
|
|
else
|
|
goto made_compressed_probe;
|
|
}
|
|
|
|
skip_normal_probe:
|
|
|
|
/*workaround for switched interfaces */
|
|
if (data_interface->cur_altsetting->desc.bInterfaceClass
|
|
!= CDC_DATA_INTERFACE_TYPE) {
|
|
if (control_interface->cur_altsetting->desc.bInterfaceClass
|
|
== CDC_DATA_INTERFACE_TYPE) {
|
|
struct usb_interface *t;
|
|
dev_dbg(&intf->dev,
|
|
"Your device has switched interfaces.\n");
|
|
t = control_interface;
|
|
control_interface = data_interface;
|
|
data_interface = t;
|
|
} 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 */
|
|
struct usb_endpoint_descriptor *t;
|
|
dev_dbg(&intf->dev,
|
|
"The data interface has switched endpoints\n");
|
|
t = epread;
|
|
epread = epwrite;
|
|
epwrite = t;
|
|
}
|
|
made_compressed_probe:
|
|
dev_dbg(&intf->dev, "interfaces are valid\n");
|
|
|
|
acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
|
|
if (acm == NULL) {
|
|
dev_err(&intf->dev, "out of memory (acm kzalloc)\n");
|
|
goto alloc_fail;
|
|
}
|
|
|
|
minor = acm_alloc_minor(acm);
|
|
if (minor == ACM_TTY_MINORS) {
|
|
dev_err(&intf->dev, "no more free acm devices\n");
|
|
kfree(acm);
|
|
return -ENODEV;
|
|
}
|
|
|
|
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;
|
|
acm->minor = minor;
|
|
acm->dev = usb_dev;
|
|
acm->ctrl_caps = ac_management_function;
|
|
if (quirks & NO_CAP_LINE)
|
|
acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
|
|
acm->ctrlsize = ctrlsize;
|
|
acm->readsize = readsize;
|
|
acm->rx_buflimit = num_rx_buf;
|
|
INIT_WORK(&acm->work, acm_softint);
|
|
spin_lock_init(&acm->write_lock);
|
|
spin_lock_init(&acm->read_lock);
|
|
mutex_init(&acm->mutex);
|
|
acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
|
|
acm->is_int_ep = usb_endpoint_xfer_int(epread);
|
|
if (acm->is_int_ep)
|
|
acm->bInterval = epread->bInterval;
|
|
tty_port_init(&acm->port);
|
|
acm->port.ops = &acm_port_ops;
|
|
|
|
buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
|
|
if (!buf) {
|
|
dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n");
|
|
goto alloc_fail2;
|
|
}
|
|
acm->ctrl_buffer = buf;
|
|
|
|
if (acm_write_buffers_alloc(acm) < 0) {
|
|
dev_err(&intf->dev, "out of memory (write buffer alloc)\n");
|
|
goto alloc_fail4;
|
|
}
|
|
|
|
acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!acm->ctrlurb) {
|
|
dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
|
|
goto alloc_fail5;
|
|
}
|
|
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) {
|
|
dev_err(&intf->dev, "out of memory "
|
|
"(read bufs usb_alloc_coherent)\n");
|
|
goto alloc_fail6;
|
|
}
|
|
rb->index = i;
|
|
rb->instance = acm;
|
|
|
|
urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!urb) {
|
|
dev_err(&intf->dev,
|
|
"out of memory (read urbs usb_alloc_urb)\n");
|
|
goto alloc_fail6;
|
|
}
|
|
urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
|
|
urb->transfer_dma = rb->dma;
|
|
if (acm->is_int_ep) {
|
|
usb_fill_int_urb(urb, acm->dev,
|
|
acm->rx_endpoint,
|
|
rb->base,
|
|
acm->readsize,
|
|
acm_read_bulk_callback, rb,
|
|
acm->bInterval);
|
|
} else {
|
|
usb_fill_bulk_urb(urb, acm->dev,
|
|
acm->rx_endpoint,
|
|
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) {
|
|
dev_err(&intf->dev,
|
|
"out of memory (write urbs usb_alloc_urb)\n");
|
|
goto alloc_fail7;
|
|
}
|
|
|
|
if (usb_endpoint_xfer_int(epwrite))
|
|
usb_fill_int_urb(snd->urb, usb_dev,
|
|
usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
|
|
NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
|
|
else
|
|
usb_fill_bulk_urb(snd->urb, usb_dev,
|
|
usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
|
|
NULL, acm->writesize, acm_write_bulk, snd);
|
|
snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
|
|
snd->instance = acm;
|
|
}
|
|
|
|
usb_set_intfdata(intf, acm);
|
|
|
|
i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
|
|
if (i < 0)
|
|
goto alloc_fail7;
|
|
|
|
if (cfd) { /* export the country data */
|
|
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;
|
|
|
|
dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
|
|
|
|
acm_set_control(acm, acm->ctrlout);
|
|
|
|
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);
|
|
|
|
usb_get_intf(control_interface);
|
|
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_fail8;
|
|
}
|
|
|
|
return 0;
|
|
alloc_fail8:
|
|
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_fail7:
|
|
usb_set_intfdata(intf, NULL);
|
|
for (i = 0; i < ACM_NW; i++)
|
|
usb_free_urb(acm->wb[i].urb);
|
|
alloc_fail6:
|
|
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_fail5:
|
|
acm_write_buffers_free(acm);
|
|
alloc_fail4:
|
|
usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
|
|
alloc_fail2:
|
|
acm_release_minor(acm);
|
|
kfree(acm);
|
|
alloc_fail:
|
|
return rv;
|
|
}
|
|
|
|
static void stop_data_traffic(struct acm *acm)
|
|
{
|
|
int i;
|
|
|
|
dev_dbg(&acm->control->dev, "%s\n", __func__);
|
|
|
|
usb_kill_urb(acm->ctrlurb);
|
|
for (i = 0; i < ACM_NW; i++)
|
|
usb_kill_urb(acm->wb[i].urb);
|
|
for (i = 0; i < acm->rx_buflimit; i++)
|
|
usb_kill_urb(acm->read_urbs[i]);
|
|
|
|
cancel_work_sync(&acm->work);
|
|
}
|
|
|
|
static void acm_disconnect(struct usb_interface *intf)
|
|
{
|
|
struct acm *acm = usb_get_intfdata(intf);
|
|
struct usb_device *usb_dev = interface_to_usbdev(intf);
|
|
struct tty_struct *tty;
|
|
int i;
|
|
|
|
dev_dbg(&intf->dev, "%s\n", __func__);
|
|
|
|
/* sibling interface is already cleaning up */
|
|
if (!acm)
|
|
return;
|
|
|
|
mutex_lock(&acm->mutex);
|
|
acm->disconnected = true;
|
|
if (acm->country_codes) {
|
|
device_remove_file(&acm->control->dev,
|
|
&dev_attr_wCountryCodes);
|
|
device_remove_file(&acm->control->dev,
|
|
&dev_attr_iCountryCodeRelDate);
|
|
}
|
|
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);
|
|
}
|
|
|
|
stop_data_traffic(acm);
|
|
|
|
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(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
|
|
acm_read_buffers_free(acm);
|
|
|
|
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;
|
|
|
|
if (PMSG_IS_AUTO(message)) {
|
|
int b;
|
|
|
|
spin_lock_irq(&acm->write_lock);
|
|
b = acm->transmitting;
|
|
spin_unlock_irq(&acm->write_lock);
|
|
if (b)
|
|
return -EBUSY;
|
|
}
|
|
|
|
spin_lock_irq(&acm->read_lock);
|
|
spin_lock(&acm->write_lock);
|
|
cnt = acm->susp_count++;
|
|
spin_unlock(&acm->write_lock);
|
|
spin_unlock_irq(&acm->read_lock);
|
|
|
|
if (cnt)
|
|
return 0;
|
|
|
|
if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
|
|
stop_data_traffic(acm);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acm_resume(struct usb_interface *intf)
|
|
{
|
|
struct acm *acm = usb_get_intfdata(intf);
|
|
struct acm_wb *wb;
|
|
int rv = 0;
|
|
int cnt;
|
|
|
|
spin_lock_irq(&acm->read_lock);
|
|
acm->susp_count -= 1;
|
|
cnt = acm->susp_count;
|
|
spin_unlock_irq(&acm->read_lock);
|
|
|
|
if (cnt)
|
|
return 0;
|
|
|
|
if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
|
|
rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO);
|
|
|
|
spin_lock_irq(&acm->write_lock);
|
|
if (acm->delayed_wb) {
|
|
wb = acm->delayed_wb;
|
|
acm->delayed_wb = NULL;
|
|
spin_unlock_irq(&acm->write_lock);
|
|
acm_start_wb(acm, wb);
|
|
} else {
|
|
spin_unlock_irq(&acm->write_lock);
|
|
}
|
|
|
|
/*
|
|
* delayed error checking because we must
|
|
* do the write path at all cost
|
|
*/
|
|
if (rv < 0)
|
|
goto err_out;
|
|
|
|
rv = acm_submit_read_urbs(acm, GFP_NOIO);
|
|
}
|
|
|
|
err_out:
|
|
return rv;
|
|
}
|
|
|
|
static int acm_reset_resume(struct usb_interface *intf)
|
|
{
|
|
struct acm *acm = usb_get_intfdata(intf);
|
|
|
|
if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
|
|
tty_port_tty_hangup(&acm->port, false);
|
|
|
|
return acm_resume(intf);
|
|
}
|
|
|
|
#endif /* CONFIG_PM */
|
|
|
|
#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(0x17ef, 0x7000), /* Lenovo USB modem */
|
|
.driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
|
|
{ USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
|
|
.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
|
|
},
|
|
{ USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
|
|
.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
|
|
},
|
|
{ USB_DEVICE(0x0e8d, 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(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(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
|
|
},
|
|
/* Motorola H24 HSPA module: */
|
|
{ USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
|
|
{ USB_DEVICE(0x22b8, 0x2d92) }, /* modem + diagnostics */
|
|
{ USB_DEVICE(0x22b8, 0x2d93) }, /* modem + AT port */
|
|
{ USB_DEVICE(0x22b8, 0x2d95) }, /* modem + AT port + diagnostics */
|
|
{ USB_DEVICE(0x22b8, 0x2d96) }, /* modem + NMEA */
|
|
{ USB_DEVICE(0x22b8, 0x2d97) }, /* modem + diagnostics + NMEA */
|
|
{ USB_DEVICE(0x22b8, 0x2d99) }, /* modem + AT port + NMEA */
|
|
{ USB_DEVICE(0x22b8, 0x2d9a) }, /* modem + AT port + diagnostics + NMEA */
|
|
|
|
{ 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 */
|
|
},
|
|
|
|
/* Nokia S60 phones expose two ACM channels. The first is
|
|
* a modem and is picked up by the standard AT-command
|
|
* information below. The second is 'vendor-specific' but
|
|
* is treated as a serial device at the S60 end, so we want
|
|
* to expose it on Linux too. */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
|
|
{ NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
|
|
{ SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
|
|
|
|
/* Support for Owen devices */
|
|
{ USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
|
|
|
|
/* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
|
|
|
|
/* Support Lego NXT using pbLua firmware */
|
|
{ USB_DEVICE(0x0694, 0xff00),
|
|
.driver_info = NOT_A_MODEM,
|
|
},
|
|
|
|
/* Support for Droids MuIn LCD */
|
|
{ USB_DEVICE(0x04d8, 0x000b),
|
|
.driver_info = NO_DATA_INTERFACE,
|
|
},
|
|
|
|
#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
|
|
{ USB_DEVICE(0x04d8, 0x0082), /* Application mode */
|
|
.driver_info = IGNORE_DEVICE,
|
|
},
|
|
{ USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
|
|
.driver_info = IGNORE_DEVICE,
|
|
},
|
|
#endif
|
|
|
|
/* 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) },
|
|
|
|
{ }
|
|
};
|
|
|
|
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
|
|
.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,
|
|
};
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
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);
|