path: root/drivers/usb/serial/digi_acceleport.c

// SPDX-License-Identifier: GPL-2.0+
/*
*  Digi AccelePort USB-4 and USB-2 Serial Converters
*
*  Copyright 2000 by Digi International
*
*  Shamelessly based on Brian Warner's keyspan_pda.c and Greg Kroah-Hartman's
*  usb-serial driver.
*
*  Peter Berger (pberger@brimson.com)
*  Al Borchers (borchers@steinerpoint.com)
*/

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/uaccess.h>
#include <linux/usb.h>
#include <linux/wait.h>
#include <linux/sched/signal.h>
#include <linux/usb/serial.h>

/* Defines */

#define DRIVER_AUTHOR "Peter Berger <pberger@brimson.com>, Al Borchers <borchers@steinerpoint.com>"
#define DRIVER_DESC "Digi AccelePort USB-2/USB-4 Serial Converter driver"

/* port output buffer length -- must be <= transfer buffer length - 2 */
/* so we can be sure to send the full buffer in one urb */
#define DIGI_OUT_BUF_SIZE		8

/* port input buffer length -- must be >= transfer buffer length - 3 */
/* so we can be sure to hold at least one full buffer from