linux-imx

// SPDX-License-Identifier: GPL-1.0+

/* r3964 linediscipline for linux

 *

 * -----------------------------------------------------------

 * Copyright by 

 * Philips Automation Projects

 * Kassel (Germany)

 * -----------------------------------------------------------

 * Author:

 * L. Haag

 *

 * $Log: n_r3964.c,v $

 * Revision 1.10  2001/03/18 13:02:24  dwmw2

 * Fix timer usage, use spinlocks properly.

 *

 * Revision 1.9  2001/03/18 12:52:14  dwmw2

 * Merge changes in 2.4.2

 *

 * Revision 1.8  2000/03/23 14:14:54  dwmw2

 * Fix race in sleeping in r3964_read()

 *

 * Revision 1.7  1999/28/08 11:41:50  dwmw2

 * Port to 2.3 kernel

 *

 * Revision 1.6  1998/09/30 00:40:40  dwmw2

 * Fixed compilation on 2.0.x kernels

 * Updated to newly registered tty-ldisc number 9

 *

 * Revision 1.5  1998/09/04 21:57:36  dwmw2

 * Signal handling bug fixes, port to 2.1.x.

 *

 * Revision 1.4  1998/04/02 20:26:59  lhaag

 * select, blocking, ...

 *

 * Revision 1.3  1998/02/12 18:58:43  root

 * fixed some memory leaks

 * calculation of checksum characters

 *

 * Revision 1.2  1998/02/07 13:03:34  root

 * ioctl read_telegram

 *

 * Revision 1.1  1998/02/06 19:21:03  root

 * Initial revision

 *

 *

 */

​

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/sched.h>

#include <linux/types.h>

#include <linux/fcntl.h>

#include <linux/interrupt.h>

#include <linux/ptrace.h>

#include <linux/ioport.h>

#include <linux/in.h>

#include <linux/slab.h>

#include <linux/tty.h>

#include <linux/errno.h>

#include <linux/string.h>   /* used in new tty drivers */

#include <linux/signal.h>   /* used in new tty drivers */

#include <linux/ioctl.h>

#include <linux/n_r3964.h>

#include <linux/poll.h>

#include <linux/init.h>

#include <linux/uaccess.h>

​

/*#define DEBUG_QUEUE*/

​

/* Log successful handshake and protocol operations  */

/*#define DEBUG_PROTO_S*/

​

/* Log handshake and protocol errors: */

/*#define DEBUG_PROTO_E*/

​

/* Log Linediscipline operations (open, close, read, write...): */

/*#define DEBUG_LDISC*/

​

/* Log module and memory operations (init, cleanup; kmalloc, kfree): */

/*#define DEBUG_MODUL*/

​

/* Macro helpers for debug output: */

#define TRACE(format, args...) printk("r3964: " format "\n" , ## args)

​

#ifdef DEBUG_MODUL

#define TRACE_M(format, args...) printk("r3964: " format "\n" , ## args)

#else

#define TRACE_M(fmt, arg...) do {} while (0)

#endif

#ifdef DEBUG_PROTO_S

#define TRACE_PS(format, args...) printk("r3964: " format "\n" , ## args)

#else