patch-2.2.18 linux/drivers/usb/acm.c

• Lines: 696
• Date: Sat Sep 23 13:25:02 2000
• Orig file: v2.2.17/drivers/usb/acm.c
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/drivers/usb/acm.c linux/drivers/usb/acm.c
@@ -0,0 +1,695 @@
+/*
+ * acm.c  Version 0.16
+ *
+ * Copyright (c) 1999 Armin Fuerst	<fuerst@in.tum.de>
+ * Copyright (c) 1999 Pavel Machek	<pavel@suse.cz>
+ * Copyright (c) 1999 Johannes Erdfelt	<jerdfelt@valinux.com>
+ * Copyright (c) 2000 Vojtech Pavlik	<vojtech@suse.cz>
+ *
+ * USB Abstract Control Model driver for USB modems and ISDN adapters
+ *
+ * Sponsored by SuSE
+ *
+ * ChangeLog:
+ *	v0.9  - thorough cleaning, URBification, almost a rewrite
+ *	v0.10 - some more cleanups
+ *	v0.11 - fixed flow control, read error doesn't stop reads
+ *	v0.12 - added TIOCM ioctls, added break handling, made struct acm kmalloced
+ *	v0.13 - added termios, added hangup
+ *	v0.14 - sized down struct acm
+ *	v0.15 - fixed flow control again - characters could be lost
+ *	v0.16 - added code for modems with swapped data and control interfaces
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/signal.h>
+#include <linux/errno.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/malloc.h>
+#include <linux/fcntl.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/tty.h>
+#include <linux/module.h>
+//#define DEBUG
+#include <linux/usb.h>
+#include <linux/devfs_fs_kernel.h>
+
+/*
+ * CMSPAR, some architectures can't have space and mark parity.
+ */
+
+#ifndef CMSPAR
+#define CMSPAR			0
+#endif
+
+/*
+ * Major and minor numbers.
+ */
+
+#define ACM_TTY_MAJOR		166
+#define ACM_TTY_MINORS		32
+
+/*
+ * Requests.
+ */
+
+#define USB_RT_ACM		(USB_TYPE_CLASS | USB_RECIP_INTERFACE)
+
+#define ACM_REQ_COMMAND		0x00
+#define ACM_REQ_RESPONSE	0x01
+#define ACM_REQ_SET_FEATURE	0x02
+#define ACM_REQ_GET_FEATURE	0x03
+#define ACM_REQ_CLEAR_FEATURE	0x04
+
+#define ACM_REQ_SET_LINE	0x20
+#define ACM_REQ_GET_LINE	0x21
+#define ACM_REQ_SET_CONTROL	0x22
+#define ACM_REQ_SEND_BREAK	0x23
+
+/*
+ * IRQs.
+ */
+
+#define ACM_IRQ_NETWORK		0x00
+#define ACM_IRQ_LINE_STATE	0x20
+
+/*
+ * Output control lines.
+ */
+
+#define ACM_CTRL_DTR		0x01
+#define ACM_CTRL_RTS		0x02
+
+/*
+ * Input control lines and line errors.
+ */
+
+#define ACM_CTRL_DCD		0x01
+#define ACM_CTRL_DSR		0x02
+#define ACM_CTRL_BRK		0x04
+#define ACM_CTRL_RI		0x08
+
+#define ACM_CTRL_FRAMING	0x10
+#define ACM_CTRL_PARITY		0x20
+#define ACM_CTRL_OVERRUN	0x40
+
+/*
+ * Line speed and caracter encoding.
+ */
+
+struct acm_line {
+	__u32 speed;
+	__u8 stopbits;
+	__u8 parity;
+	__u8 databits;
+} __attribute__ ((packed));
+
+/*
+ * Internal driver structures.
+ */
+
+struct acm {
+	struct usb_device *dev;				/* the coresponding usb device */
+	struct usb_interface *iface;			/* the interfaces - +0 control +1 data */
+	struct tty_struct *tty;				/* the coresponding tty */
+	struct urb ctrlurb, readurb, writeurb;		/* urbs */
+	struct acm_line line;				/* line coding (bits, stop, parity) */
+	struct tq_struct tqueue;			/* task queue for line discipline waking up */
+	unsigned int ctrlin;				/* input control lines (DCD, DSR, RI, break, overruns) */
+	unsigned int ctrlout;				/* output control lines (DTR, RTS) */
+	unsigned int writesize;				/* max packet size for the output bulk endpoint */
+	unsigned int used;				/* someone has this acm's device open */
+	unsigned int minor;				/* acm minor number */
+	unsigned char throttle;				/* throttled by tty layer */
+	unsigned char clocal;				/* termios CLOCAL */
+};
+
+static struct usb_driver acm_driver;
+static struct tty_driver acm_tty_driver;
+static struct acm *acm_table[ACM_TTY_MINORS] = { NULL, /* .... */ };
+
+#define ACM_READY(acm)	(acm && acm->dev && acm->used)
+
+/*
+ * Functions for ACM control messages.
+ */
+
+static int acm_ctrl_msg(struct acm *acm, int request, int value, void *buf, int len)
+{
+	int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
+		request, USB_RT_ACM, value, acm->iface[0].altsetting[0].bInterfaceNumber, buf, len, HZ * 5);
+	dbg("acm_control_msg: rq: 0x%02x val: %#x len: %#x result: %d", request, value, len, retval);
+	return retval < 0 ? retval : 0;
+}
+
+#define acm_set_control(acm, control)	acm_ctrl_msg(acm, ACM_REQ_SET_CONTROL, control, NULL, 0)
+#define acm_set_line(acm, line)		acm_ctrl_msg(acm, ACM_REQ_SET_LINE, 0, line, sizeof(struct acm_line))
+#define acm_send_break(acm, ms)		acm_ctrl_msg(acm, ACM_REQ_SEND_BREAK, ms, NULL, 0)
+
+/*
+ * Interrupt handler for various ACM control events
+ */
+
+static void acm_ctrl_irq(struct urb *urb)
+{
+	struct acm *acm = urb->context;
+	devrequest *dr = urb->transfer_buffer;
+	unsigned char *data = (unsigned char *)(dr + 1);
+	int newctrl;
+
+	if (!ACM_READY(acm)) return;
+
+	if (urb->status < 0) {
+		dbg("nonzero ctrl irq status received: %d", urb->status);
+		return;
+	}
+
+	switch (dr->request) {
+
+		case ACM_IRQ_NETWORK:
+	
+			dbg("%s network", data[0] ? "connected to" : "disconnected from");
+			return;
+
+		case ACM_IRQ_LINE_STATE:
+
+			newctrl = le16_to_cpup((__u16 *) data);
+
+#if 0
+			/* Please someone tell me how to do this properly to kill pppd and not kill minicom */
+			if (acm->tty && !acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
+				dbg("calling hangup");
+				tty_hangup(acm->tty);
+			}
+#endif
+
+			acm->ctrlin = newctrl;
+
+			dbg("input control lines: dcd%c dsr%c break%c ring%c framing%c parity%c overrun%c",
+				acm->ctrlin & ACM_CTRL_DCD ? '+' : '-',	acm->ctrlin & ACM_CTRL_DSR ? '+' : '-',
+				acm->ctrlin & ACM_CTRL_BRK ? '+' : '-',	acm->ctrlin & ACM_CTRL_RI  ? '+' : '-',
+				acm->ctrlin & ACM_CTRL_FRAMING ? '+' : '-',	acm->ctrlin & ACM_CTRL_PARITY ? '+' : '-',
+				acm->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-');
+
+			return;
+
+		default:
+			dbg("unknown control event received: request %d index %d len %d data0 %d data1 %d",
+				dr->request, dr->index, dr->length, data[0], data[1]);
+			return;
+	}
+}
+
+static void acm_read_bulk(struct urb *urb)
+{
+	struct acm *acm = urb->context;
+	struct tty_struct *tty = acm->tty;
+	unsigned char *data = urb->transfer_buffer;
+	int i = 0;
+
+	if (!ACM_READY(acm)) return;
+
+	if (urb->status)
+		dbg("nonzero read bulk status received: %d", urb->status);
+
+	if (!urb->status & !acm->throttle)  {
+		for (i = 0; i < urb->actual_length && !acm->throttle; i++)
+			tty_insert_flip_char(tty, data[i], 0);
+		tty_flip_buffer_push(tty);
+	}
+
+	if (acm->throttle) {
+		memmove(data, data + i, urb->actual_length - i);
+		urb->actual_length -= i;
+		return;
+	}
+
+	urb->actual_length = 0;
+
+	if (usb_submit_urb(urb))
+		dbg("failed resubmitting read urb");
+}
+
+static void acm_write_bulk(struct urb *urb)
+{
+	struct acm *acm = (struct acm *)urb->context;
+
+	if (!ACM_READY(acm)) return;
+
+	if (urb->status)
+		dbg("nonzero write bulk status received: %d", urb->status);
+
+	queue_task(&acm->tqueue, &tq_immediate);
+	mark_bh(IMMEDIATE_BH);
+}
+
+static void acm_softint(void *private)
+{
+	struct acm *acm = private;
+	struct tty_struct *tty = acm->tty;
+
+ 	if (!ACM_READY(acm)) return;
+
+	if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
+		(tty->ldisc.write_wakeup)(tty);
+
+	wake_up_interruptible(&tty->write_wait);
+}
+
+/*
+ * TTY handlers
+ */
+
+static int acm_tty_open(struct tty_struct *tty, struct file *filp)
+{
+	struct acm *acm = acm_table[MINOR(tty->device)];
+
+	if (!acm || !acm->dev) return -EINVAL;
+
+	tty->driver_data = acm;
+	acm->tty = tty;
+
+	MOD_INC_USE_COUNT;
+
+	if (acm->used++) return 0;
+
+	if (usb_submit_urb(&acm->ctrlurb))
+		dbg("usb_submit_urb(ctrl irq) failed");
+
+	if (usb_submit_urb(&acm->readurb))
+		dbg("usb_submit_urb(read bulk) failed");
+
+	acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS);
+
+	return 0;
+}
+
+static void acm_tty_close(struct tty_struct *tty, struct file *filp)
+{
+	struct acm *acm = tty->driver_data;
+
+	if (!acm || !acm->used) return;
+
+	if (!--acm->used) {
+		if (acm->dev) {
+			acm_set_control(acm, acm->ctrlout = 0);
+			usb_unlink_urb(&acm->ctrlurb);
+			usb_unlink_urb(&acm->writeurb);
+			usb_unlink_urb(&acm->readurb);
+		} else {
+			tty_unregister_devfs(&acm_tty_driver, acm->minor);
+			acm_table[acm->minor] = NULL;
+			kfree(acm);
+		}
+	}
+	MOD_DEC_USE_COUNT;
+}
+
+static int acm_tty_write(struct tty_struct *tty, int from_user, const unsigned char *buf, int count)
+{
+	struct acm *acm = tty->driver_data;
+
+	if (!ACM_READY(acm)) return -EINVAL;
+	if (acm->writeurb.status == -EINPROGRESS) return 0;
+	if (!count) return 0;
+
+	count = (count > acm->writesize) ? acm->writesize : count;
+
+	if (from_user)
+		copy_from_user(acm->writeurb.transfer_buffer, buf, count);
+	else
+		memcpy(acm->writeurb.transfer_buffer, buf, count);
+
+	acm->writeurb.transfer_buffer_length = count;
+
+	if (usb_submit_urb(&acm->writeurb))
+		dbg("usb_submit_urb(write bulk) failed");
+
+	return count;
+}
+
+static int acm_tty_write_room(struct tty_struct *tty)
+{
+	struct acm *acm = tty->driver_data;
+	if (!ACM_READY(acm)) return -EINVAL;
+	return acm->writeurb.status == -EINPROGRESS ? 0 : acm->writesize;
+}
+
+static int acm_tty_chars_in_buffer(struct tty_struct *tty)
+{
+	struct acm *acm = tty->driver_data;
+	if (!ACM_READY(acm)) return -EINVAL;
+	return acm->writeurb.status == -EINPROGRESS ? acm->writeurb.transfer_buffer_length : 0;
+}
+
+static void acm_tty_throttle(struct tty_struct *tty)
+{
+	struct acm *acm = tty->driver_data;
+	if (!ACM_READY(acm)) return;
+	acm->throttle = 1;
+}
+
+static void acm_tty_unthrottle(struct tty_struct *tty)
+{
+	struct acm *acm = tty->driver_data;
+	if (!ACM_READY(acm)) return;
+	acm->throttle = 0;
+	if (acm->readurb.status != -EINPROGRESS)
+		acm_read_bulk(&acm->readurb);
+}
+
+static void acm_tty_break_ctl(struct tty_struct *tty, int state)
+{
+	struct acm *acm = tty->driver_data;
+	if (!ACM_READY(acm)) return;
+	if (acm_send_break(acm, state ? 0xffff : 0))
+		dbg("send break failed");
+}
+
+static int acm_tty_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
+{
+	struct acm *acm = tty->driver_data;
+	unsigned int retval, mask, newctrl;
+
+	if (!ACM_READY(acm)) return -EINVAL;
+
+	switch (cmd) {
+
+		case TIOCMGET:
+
+			return put_user((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, (unsigned long *) arg);
+
+		case TIOCMSET:
+		case TIOCMBIS:
+		case TIOCMBIC:
+
+			if ((retval = get_user(mask, (unsigned long *) arg))) return retval;
+
+			newctrl = acm->ctrlout;
+			mask = (mask & TIOCM_DTR ? ACM_CTRL_DTR : 0) | (mask & TIOCM_RTS ? ACM_CTRL_RTS : 0);
+
+			switch (cmd) {
+				case TIOCMSET: newctrl  =  mask; break;
+				case TIOCMBIS: newctrl |=  mask; break;
+				case TIOCMBIC: newctrl &= ~mask; break;
+			}
+	
+			if (acm->ctrlout == newctrl) return 0; 
+			return acm_set_control(acm, acm->ctrlout = newctrl);
+	}
+
+	return -ENOIOCTLCMD;
+}
+
+static __u32 acm_tty_speed[] = { 
+	0, 50, 75, 110, 134, 150, 200, 300, 600,
+	1200, 1800, 2400, 4800, 9600, 19200, 38400,
+	57600, 115200, 230400, 460800, 500000, 576000,
+	921600, 1000000, 1152000, 1500000, 2000000,
+	2500000, 3000000, 3500000, 4000000
+};
+
+static __u8 acm_tty_size[] = {
+	5, 6, 7, 8
+};
+
+static void acm_tty_set_termios(struct tty_struct *tty, struct termios *termios_old)
+{
+	struct acm *acm = tty->driver_data;
+	struct termios *termios = tty->termios;
+	struct acm_line newline;
+	int newctrl = acm->ctrlout;
+
+	if (!ACM_READY(acm)) return;
+
+	newline.speed = cpu_to_le32p(acm_tty_speed +
+		(termios->c_cflag & CBAUD & ~CBAUDEX) + (termios->c_cflag & CBAUDEX ? 15 : 0));
+	newline.stopbits = termios->c_cflag & CSTOPB ? 2 : 0;
+	newline.parity = termios->c_cflag & PARENB ?
+		(termios->c_cflag & PARODD ? 1 : 2) + (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
+	newline.databits = acm_tty_size[(termios->c_cflag & CSIZE) >> 4];
+
+	acm->clocal = termios->c_cflag & CLOCAL;
+	
+	if (!newline.speed) {
+		newline.speed = acm->line.speed;
+		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(struct acm_line))) {
+		memcpy(&acm->line, &newline, sizeof(struct acm_line));
+		dbg("set line: %d %d %d %d", newline.speed, newline.stopbits, newline.parity, newline.databits);
+		acm_set_line(acm, &acm->line);
+	}
+}
+
+/*
+ * USB probe and disconnect routines.
+ */
+
+static void *acm_probe(struct usb_device *dev, unsigned int ifnum)
+{
+	struct acm *acm;
+	struct usb_config_descriptor *cfacm;
+	struct usb_interface_descriptor *ifcom, *ifdata;
+	struct usb_endpoint_descriptor *epctrl, *epread, *epwrite;
+	int readsize, ctrlsize, minor, i;
+	unsigned char *buf;
+
+	if (dev->descriptor.bDeviceClass != 2 || dev->descriptor.bDeviceSubClass != 0
+		|| dev->descriptor.bDeviceProtocol != 0) return NULL;
+
+	for (i = 0; i < dev->descriptor.bNumConfigurations; i++) {
+
+		cfacm = dev->config + i;
+
+		dbg("probing config %d", cfacm->bConfigurationValue);
+
+		if (cfacm->bNumInterfaces != 2 || 
+		    usb_interface_claimed(cfacm->interface + 0) ||
+		    usb_interface_claimed(cfacm->interface + 1))
+			continue;
+
+		ifcom = cfacm->interface[0].altsetting + 0;
+		ifdata = cfacm->interface[1].altsetting + 0;
+
+		if (ifdata->bInterfaceClass != 10 || ifdata->bNumEndpoints != 2) {
+			ifcom = cfacm->interface[1].altsetting + 0;
+			ifdata = cfacm->interface[0].altsetting + 0;
+			if (ifdata->bInterfaceClass != 10 || ifdata->bNumEndpoints != 2)
+				continue;
+		}
+
+		if (ifcom->bInterfaceClass != 2 || ifcom->bInterfaceSubClass != 2 ||
+		    ifcom->bInterfaceProtocol != 1 || ifcom->bNumEndpoints != 1)
+			continue;
+
+		epctrl = ifcom->endpoint + 0;
+		epread = ifdata->endpoint + 0;
+		epwrite = ifdata->endpoint + 1;
+
+		if ((epctrl->bEndpointAddress & 0x80) != 0x80 || (epctrl->bmAttributes & 3) != 3 ||
+		   (epread->bmAttributes & 3) != 2 || (epwrite->bmAttributes & 3) != 2 ||
+		   ((epread->bEndpointAddress & 0x80) ^ (epwrite->bEndpointAddress & 0x80)) != 0x80)
+			continue;
+
+		if ((epread->bEndpointAddress & 0x80) != 0x80) {
+			epread = ifdata->endpoint + 1;
+			epwrite = ifdata->endpoint + 0;
+		}
+
+		usb_set_configuration(dev, cfacm->bConfigurationValue);
+
+		for (minor = 0; minor < ACM_TTY_MINORS && acm_table[minor]; minor++);
+		if (acm_table[minor]) {
+			err("no more free acm devices");
+			return NULL;
+		}
+
+		if (!(acm = kmalloc(sizeof(struct acm), GFP_KERNEL))) {
+			err("out of memory");
+			return NULL;
+		}
+		memset(acm, 0, sizeof(struct acm));
+
+		ctrlsize = epctrl->wMaxPacketSize;
+		readsize = epread->wMaxPacketSize;
+		acm->writesize = epwrite->wMaxPacketSize;
+		acm->iface = cfacm->interface;
+		acm->minor = minor;
+		acm->dev = dev;
+
+		acm->tqueue.routine = acm_softint;
+		acm->tqueue.data = acm;
+
+		if (!(buf = kmalloc(ctrlsize + readsize + acm->writesize, GFP_KERNEL))) {
+			err("out of memory");
+			kfree(acm);
+			return NULL;
+		}
+
+		FILL_INT_URB(&acm->ctrlurb, dev, usb_rcvintpipe(dev, epctrl->bEndpointAddress),
+			buf, ctrlsize, acm_ctrl_irq, acm, epctrl->bInterval);
+
+		FILL_BULK_URB(&acm->readurb, dev, usb_rcvbulkpipe(dev, epread->bEndpointAddress),
+			buf += ctrlsize, readsize, acm_read_bulk, acm);
+
+		FILL_BULK_URB(&acm->writeurb, dev, usb_sndbulkpipe(dev, epwrite->bEndpointAddress),
+			buf += readsize, acm->writesize, acm_write_bulk, acm);
+	
+		printk(KERN_INFO "ttyACM%d: USB ACM device\n", minor);
+
+		acm_set_control(acm, acm->ctrlout);
+
+		acm->line.speed = cpu_to_le32(9600);
+		acm->line.databits = 8;
+		acm_set_line(acm, &acm->line);
+
+		usb_driver_claim_interface(&acm_driver, acm->iface + 0, acm);
+		usb_driver_claim_interface(&acm_driver, acm->iface + 1, acm);
+
+		tty_register_devfs(&acm_tty_driver, 0, minor);
+		return acm_table[minor] = acm;
+	}
+
+	return NULL;
+}
+
+static void acm_disconnect(struct usb_device *dev, void *ptr)
+{
+	struct acm *acm = ptr;
+
+	if (!acm || !acm->dev) {
+		dbg("disconnect on nonexisting interface");
+		return;
+	}
+
+	acm->dev = NULL;
+
+	usb_unlink_urb(&acm->ctrlurb);
+	usb_unlink_urb(&acm->readurb);
+	usb_unlink_urb(&acm->writeurb);
+
+	kfree(acm->ctrlurb.transfer_buffer);
+
+	usb_driver_release_interface(&acm_driver, acm->iface + 0);
+	usb_driver_release_interface(&acm_driver, acm->iface + 1);
+
+	if (!acm->used) {
+		tty_unregister_devfs(&acm_tty_driver, acm->minor);
+		acm_table[acm->minor] = NULL;
+		kfree(acm);
+		return;
+	}
+
+	if (acm->tty)
+		tty_hangup(acm->tty);
+}
+
+/*
+ * USB driver structure.
+ */
+
+static struct usb_driver acm_driver = {
+	name:		"acm",
+	probe:		acm_probe,
+	disconnect:	acm_disconnect
+};
+
+/*
+ * TTY driver structures.
+ */
+
+static int acm_tty_refcount;
+
+static struct tty_struct *acm_tty_table[ACM_TTY_MINORS];
+static struct termios *acm_tty_termios[ACM_TTY_MINORS];
+static struct termios *acm_tty_termios_locked[ACM_TTY_MINORS];
+
+static struct tty_driver acm_tty_driver = {
+	magic:			TTY_DRIVER_MAGIC,
+	driver_name:		"acm",
+	name:			"usb/acm/%d",
+	major:			ACM_TTY_MAJOR,
+	minor_start:		0,
+	num:			ACM_TTY_MINORS,
+	type:			TTY_DRIVER_TYPE_SERIAL,
+	subtype:		SERIAL_TYPE_NORMAL,
+	flags:			TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS,
+
+	refcount:		&acm_tty_refcount,
+
+	table:			acm_tty_table,
+	termios:		acm_tty_termios,
+	termios_locked:		acm_tty_termios_locked,
+
+	open:			acm_tty_open,
+	close:			acm_tty_close,
+	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
+};
+
+/*
+ * Init / exit.
+ */
+
+static int __init acm_init(void)
+{
+	acm_tty_driver.init_termios =		tty_std_termios;
+	acm_tty_driver.init_termios.c_cflag =	B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+
+	if (tty_register_driver(&acm_tty_driver))
+		return -1;
+
+	if (usb_register(&acm_driver) < 0) {
+		tty_unregister_driver(&acm_tty_driver);
+		return -1;
+	}
+
+	return 0;
+}
+
+static void __exit acm_exit(void)
+{
+	usb_deregister(&acm_driver);
+	tty_unregister_driver(&acm_tty_driver);
+}
+
+module_init(acm_init);
+module_exit(acm_exit);
+
+MODULE_AUTHOR("Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik");
+MODULE_DESCRIPTION("USB Abstract Control Model driver for USB modems and ISDN adapters");