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npreal2.c
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npreal2.c
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/*
* npreal2.c -- MOXA NPort Server family Real TTY driver.
*
* Copyright (C) 1999-2012 Moxa Inc. ([email protected]).
*
* This code is loosely based on the Linux serial driver, written by
* Linus Torvalds, Theodore T'so and others.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
*/
#ifdef MODVERSIONS
#ifndef MODULE
#define MODULE
#endif
#endif
#define JOY 1
#include <linux/version.h>
#define VERSION_CODE(ver,rel,seq) ((ver << 16) | (rel << 8) | seq)
#ifndef _DEBIAN_
#ifdef MODULE
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,18))
#include <linux/config.h>
#endif
#ifdef MODVERSIONS
#include <linux/modversions.h>
#endif
#include <linux/module.h>
#else
#define MOD_INC_USE_COUNT
#define MOD_DEC_USE_COUNT
#endif
#include <linux/init.h>
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,32))
#include <linux/autoconf.h>
#endif
#include <linux/errno.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial.h>
#include <linux/serial_reg.h>
#include <linux/major.h>
#include <linux/string.h>
#include <linux/fcntl.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/mm.h>
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,39))
#include <linux/smp_lock.h>
#endif
#include <linux/proc_fs.h>
#else
#ifdef MODULE
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,18))
#include <config/config.h>
#endif
#ifdef MODVERSIONS
#include <config/modversions.h>
#endif
#include <config/module.h>
#else
#define MOD_INC_USE_COUNT
#define MOD_DEC_USE_COUNT
#endif
#include <config/init.h>
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,32))
#include <config/autoconf.h>
#endif
#include <config/errno.h>
#include <config/signal.h>
#include <config/sched.h>
#include <config/timer.h>
#include <config/interrupt.h>
#include <config/tty.h>
#include <config/tty_flip.h>
#include <config/serial.h>
#include <config/serial_reg.h>
#include <config/major.h>
#include <config/string.h>
#include <config/fcntl.h>
#include <config/ptrace.h>
#include <config/ioport.h>
#include <config/mm.h>
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,39))
#include <config/smp_lock.h>
#endif
#include <config/proc_fs.h>
#endif
#define NPREAL_VERSION "1.18.29 Build 14052013"
#if (LINUX_VERSION_CODE > VERSION_CODE(2,6,36))
/* include/linux/semaphore.h modification */
#define init_MUTEX(sem) sema_init(sem, 1)
#endif
#if (LINUX_VERSION_CODE < VERSION_CODE(2,1,0))
#define copy_from_user memcpy_fromfs
#define copy_to_user memcpy_tofs
#define put_to_user(arg1, arg2) put_fs_long(arg1, (unsigned long *)arg2)
#define get_from_user(arg1, arg2) arg1 = get_fs_long((unsigned long *)arg2)
#define schedule_timeout(x) {current->timeout = jiffies + (x); schedule();}
#define signal_pending(x) ((x)->signal & ~(x)->blocked)
#else
#include <asm/uaccess.h>
#include <linux/poll.h>
#define put_to_user(arg1, arg2) put_user(arg1, arg2)
#define get_from_user(arg1, arg2) get_user(arg1, arg2)
#endif
#include "npreal2.h"
# if (LINUX_VERSION_CODE > VERSION_CODE(3,10,0))
#include <linux/slab.h>
#endif
#define NPREAL_EVENT_TXLOW 1
#define NPREAL_EVENT_HANGUP 2
#define SERIAL_DO_RESTART
#define SERIAL_TYPE_NORMAL 1
#define SERIAL_TYPE_CALLOUT 2
#define WAKEUP_CHARS 256
#ifndef MAX_SCHEDULE_TIMEOUT
#define MAX_SCHEDULE_TIMEOUT ((long)(~0UL>>1))
#endif
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,0))
#define PORTNO(x) (MINOR((x)->device) - (x)->driver.minor_start)
#else
#define PORTNO(x) ((x)->index)
#endif
#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
#ifndef MIN
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#endif
#define NPREALMAJOR 33
#define NPREALCUMAJOR 38
static int ttymajor=NPREALMAJOR;
static int calloutmajor=NPREALCUMAJOR;
static int verbose=1;
int MXDebugLevel = MX_DEBUG_ERROR;
#ifdef MODULE
/* Variables for insmod */
# if (LINUX_VERSION_CODE > VERSION_CODE(2,1,11))
MODULE_AUTHOR("Moxa Tech.,www.moxa.com.tw");
MODULE_DESCRIPTION("MOXA Async/NPort Server Family Real TTY Driver");
# if (LINUX_VERSION_CODE < VERSION_CODE(2,6,6))
MODULE_PARM(ttymajor, "i");
MODULE_PARM(calloutmajor, "i");
MODULE_PARM(verbose, "i");
# else
module_param(ttymajor, int, 0);
module_param(calloutmajor, int, 0);
module_param(verbose, int, 0644);
MODULE_VERSION(NPREAL_VERSION);
# endif
# if (LINUX_VERSION_CODE > VERSION_CODE(2,4,0))
#ifdef MODULE_LICENSE
MODULE_LICENSE("GPL");
#endif
# endif
# endif
#endif /* MODULE */
#define NPREAL_PORTS 256
#define DE211 211
#define DE311 311
#define DE301 301
#define DE302 302
#define DE304 304
#define DE331 331
#define DE332 332
#define DE334 334
#define DE303 303
#define DE308 308
#define DE309 309
#define CN2100 2100
#define CN2500 2500
#ifndef B921600
#define B921600 (B460800 + 1)
#endif
#define NPREAL_ASPP_COMMAND_SET 1
#define NPREAL_LOCAL_COMMAND_SET 2
// local command set
#define LOCAL_CMD_TTY_USED 1
#define LOCAL_CMD_TTY_UNUSED 2
#define NPREAL_NET_CONNECTED 3
#define NPREAL_NET_DISCONNECTED 4
#define NPREAL_NET_SETTING 5
#define NPREAL_NET_GET_TTY_STATUS 6
#define NPREAL_CMD_TIMEOUT 10*HZ // 10 seconds
#define NPREAL_NET_CMD_RETRIEVE 1
#define NPREAL_NET_CMD_RESPONSE 2
#define NPREAL_NET_NODE_OPENED 0x01
#define NPREAL_NET_NODE_CONNECTED 0x02
#define NPREAL_NET_NODE_DISCONNECTED 0x04
#define NPREAL_NET_DO_SESSION_RECOVERY 0x08
#define NPREAL_NET_DO_INITIALIZE 0x10
#define NPREAL_NET_TTY_INUSED 0x20
// ASPP command set
#define ASPP_NOTIFY 0x26
#define ASPP_NOTIFY_PARITY 0x01
#define ASPP_NOTIFY_FRAMING 0x02
#define ASPP_NOTIFY_HW_OVERRUN 0x04
#define ASPP_NOTIFY_SW_OVERRUN 0x08
#define ASPP_NOTIFY_BREAK 0x10
#define ASPP_NOTIFY_MSR_CHG 0x20
#define ASPP_CMD_IOCTL 16
#define ASPP_CMD_FLOWCTRL 17
#define ASPP_CMD_LSTATUS 19
#define ASPP_CMD_LINECTRL 18
#define ASPP_CMD_FLUSH 20
#define ASPP_CMD_OQUEUE 22
#define ASPP_CMD_SETBAUD 23
#define ASPP_CMD_START_BREAK 33
#define ASPP_CMD_STOP_BREAK 34
#define ASPP_CMD_START_NOTIFY 36
#define ASPP_CMD_STOP_NOTIFY 37
#define ASPP_CMD_HOST 43
#define ASPP_CMD_PORT_INIT 44
#define ASPP_CMD_WAIT_OQUEUE 47
#define ASPP_CMD_IQUEUE 21
#define ASPP_CMD_XONXOFF 24
#define ASPP_CMD_PORT_RESET 32
#define ASPP_CMD_RESENT_TIME 46
#define ASPP_CMD_TX_FIFO 48
#define ASPP_CMD_SETXON 51
#define ASPP_CMD_SETXOFF 52
#define ASPP_FLUSH_RX_BUFFER 0
#define ASPP_FLUSH_TX_BUFFER 1
#define ASPP_FLUSH_ALL_BUFFER 2
#define ASPP_IOCTL_B300 0
#define ASPP_IOCTL_B600 1
#define ASPP_IOCTL_B1200 2
#define ASPP_IOCTL_B2400 3
#define ASPP_IOCTL_B4800 4
#define ASPP_IOCTL_B7200 5
#define ASPP_IOCTL_B9600 6
#define ASPP_IOCTL_B19200 7
#define ASPP_IOCTL_B38400 8
#define ASPP_IOCTL_B57600 9
#define ASPP_IOCTL_B115200 10
#define ASPP_IOCTL_B230400 11
#define ASPP_IOCTL_B460800 12
#define ASPP_IOCTL_B921600 13
#define ASPP_IOCTL_B150 14
#define ASPP_IOCTL_B134 15
#define ASPP_IOCTL_B110 16
#define ASPP_IOCTL_B75 17
#define ASPP_IOCTL_B50 18
#define ASPP_IOCTL_BITS8 3
#define ASPP_IOCTL_BITS7 2
#define ASPP_IOCTL_BITS6 1
#define ASPP_IOCTL_BITS5 0
#define ASPP_IOCTL_STOP1 0
#define ASPP_IOCTL_STOP2 4
#define ASPP_IOCTL_EVEN 8
#define ASPP_IOCTL_ODD 16
#define ASPP_IOCTL_MARK 24
#define ASPP_IOCTL_SPACE 32
#define ASPP_IOCTL_NONE 0
struct server_setting_struct
{
int32_t server_type;
int32_t disable_fifo;
};
struct npreal_struct
{
int port;
#if (LINUX_VERSION_CODE >= VERSION_CODE(3,7,0))
struct tty_port ttyPort;
#endif
int flags; /* defined in tty.h */
int type; /* UART type */
struct tty_struct * tty;
int xmit_fifo_size;
int custom_divisor;
unsigned long baud_base;
int x_char; /* xon/xoff character */
int close_delay;
unsigned short closing_wait;
int modem_control; /* Modem control register */
int modem_status; /* Line status */
unsigned long event;
int count; /* # of fd on device */
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,6,31))
struct pid* session;
struct pid* pgrp;
#else
pid_t session; /* Session of opening process */
pid_t pgrp; /* pgrp of opening process */
#endif
unsigned char *xmit_buf;
int xmit_head;
int xmit_tail;
int xmit_cnt;
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,0))
struct tq_struct tqueue;
struct tq_struct process_flip_tqueue;
#else
struct work_struct tqueue;
struct work_struct process_flip_tqueue;
#endif
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,20))
struct termios normal_termios;
struct termios callout_termios;
#else
struct ktermios normal_termios;
struct ktermios callout_termios;
#endif
#if (LINUX_VERSION_CODE < VERSION_CODE(2,4,0))
struct wait_queue *open_wait;
struct wait_queue *close_wait;
struct wait_queue *delta_msr_wait;
#else
wait_queue_head_t open_wait;
wait_queue_head_t close_wait;
wait_queue_head_t delta_msr_wait;
#endif
struct async_icount icount; /* kernel counters for the 4 input interrupts */
struct nd_struct *net_node;
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,4,0))
/* We use spin_lock_irqsave instead of semaphonre here.
Reason: When we use pppd to dialout via Real TTY driver,
some driver functions, such as npreal_write(), would be
invoked under interrpute mode which causes warning in
down/up tx_semaphore.
*/
// struct semaphore tx_lock;
spinlock_t tx_lock;
struct semaphore rx_semaphore;
#else
struct semaphore tx_lock;
struct semaphore rx_semaphore;
#endif
};
struct nd_struct
{
int32_t server_type;
#if (LINUX_VERSION_CODE < VERSION_CODE(2,4,0))
struct wait_queue *initialize_wait;
struct wait_queue *select_in_wait;
struct wait_queue *select_out_wait;
struct wait_queue *select_ex_wait;
struct wait_queue *cmd_rsp_wait;
#else
wait_queue_head_t initialize_wait;
wait_queue_head_t select_in_wait;
wait_queue_head_t select_out_wait;
wait_queue_head_t select_ex_wait;
wait_queue_head_t cmd_rsp_wait;
#endif
int tx_ready;
int rx_ready;
int cmd_ready;
int wait_oqueue_responsed;
int oqueue;
unsigned char cmd_buffer[84];
unsigned char rsp_buffer[84];
struct semaphore cmd_semaphore;
int rsp_length;
unsigned long flag;
struct proc_dir_entry *node_entry;
struct npreal_struct *tty_node;
struct semaphore semaphore;
int do_session_recovery_len;
};
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,0))
static struct tty_driver npvar_sdriver;
static struct tty_driver npvar_cdriver;
#else
static struct tty_driver *npvar_sdriver;
#endif
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,0))
static int npvar_refcount;
#endif
static struct npreal_struct npvar_table[NPREAL_PORTS];
static struct nd_struct npvar_net_nodes[NPREAL_PORTS];
#if (LINUX_VERSION_CODE < VERSION_CODE(3,7,0))
static struct tty_struct * npvar_tty[NPREAL_PORTS];
#endif
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,20))
static struct termios * npvar_termios[NPREAL_PORTS];
static struct termios * npvar_termios_locked[NPREAL_PORTS];
#else
#if (LINUX_VERSION_CODE < VERSION_CODE(3,7,0))
static struct ktermios * npvar_termios[NPREAL_PORTS];
#endif
#if (LINUX_VERSION_CODE < VERSION_CODE(3,3,0))
static struct ktermios * npvar_termios_locked[NPREAL_PORTS];
#endif
#endif
static int npvar_diagflag;
static struct proc_dir_entry * npvar_proc_root;
/*
* npvar_tmp_buf is used as a temporary buffer by serial_write. We need
* to lock it in case the memcpy_fromfs blocks while swapping in a page,
* and some other program tries to do a serial write at the same time.
* Since the lock will only come under contention when the system is
* swapping and available memory is low, it makes sense to share one
* buffer across all the serial ports, since it significantly saves
* memory if large numbers of serial ports are open.
*/
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,4,0))
static unsigned char * npvar_tmp_buf;
static struct semaphore npvar_tmp_buf_sem;
#else
static unsigned char * npvar_tmp_buf = 0;
static struct semaphore npvar_tmp_buf_sem = MUTEX;
#endif
#if (LINUX_VERSION_CODE < VERSION_CODE(2,4,0))
static struct inode_operations npreal_net_iops;
#endif
static struct file_operations npreal_net_fops;
#ifdef MODULE
int init_module(void);
void cleanup_module(void);
#endif
static void npreal_disconnect(struct nd_struct *, char *, int *);
int npreal_init(void);
static int npreal_init_tty(void);
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,20))
static void npreal_do_softint(void *);
static void npreal_flush_to_ldisc(void *);
#else
static void npreal_do_softint(struct work_struct *work);
static void npreal_flush_to_ldisc(struct work_struct *work);
#endif
static int npreal_open(struct tty_struct *,struct file *);
static void npreal_close(struct tty_struct *,struct file *);
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,10))
static int npreal_write(struct tty_struct *,int,const unsigned char *,int);
#else
static int npreal_write(struct tty_struct *,const unsigned char *,int);
#endif
static int npreal_write_room(struct tty_struct *);
static void npreal_flush_buffer(struct tty_struct *);
static void npreal_ldisc_flush_buffer(struct tty_struct *);
static int npreal_chars_in_buffer(struct tty_struct *);
static void npreal_flush_chars(struct tty_struct *);
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,26))
static void npreal_put_char(struct tty_struct *,unsigned char);
#else
static int npreal_put_char(struct tty_struct *,unsigned char);
#endif
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,39))
static int npreal_ioctl(struct tty_struct *,struct file *,uint,ulong);
#else
static int npreal_ioctl(struct tty_struct *,uint,ulong);
#endif
static void npreal_throttle(struct tty_struct *);
static void npreal_unthrottle(struct tty_struct *);
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,20))
static void npreal_set_termios(struct tty_struct *,struct termios *);
static int npreal_port_init(struct npreal_struct *,struct termios *);
#else
static void npreal_set_termios(struct tty_struct *,struct ktermios *);
static int npreal_port_init(struct npreal_struct *,struct ktermios *);
#endif
static void npreal_stop(struct tty_struct *);
static void npreal_start(struct tty_struct *);
static void npreal_hangup(struct tty_struct *);
static inline void npreal_check_modem_status(struct npreal_struct *,int);
static int npreal_block_til_ready(struct tty_struct *,struct file *, struct npreal_struct *);
static int npreal_startup(struct npreal_struct *,struct file *, struct tty_struct *);
static void npreal_shutdown(struct npreal_struct *);
static int npreal_port_shutdown(struct npreal_struct *);
static int npreal_get_serial_info(struct npreal_struct *, struct serial_struct *);
static int npreal_set_serial_info(struct npreal_struct *, struct serial_struct *);
static int npreal_get_lsr_info(struct npreal_struct *,unsigned int *);
static void npreal_send_break(struct npreal_struct *,int);
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,6,0))
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,39))
static int npreal_tiocmget(struct tty_struct *, struct file *);
static int npreal_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int);
#else
static int npreal_tiocmget(struct tty_struct *);
static int npreal_tiocmset(struct tty_struct *, unsigned int, unsigned int);
#endif
#else
static int npreal_get_modem_info(struct npreal_struct *,unsigned int *);
static int npreal_set_modem_info(struct npreal_struct *,unsigned int, unsigned int *);
#endif
static void npreal_process_notify(struct nd_struct *,char *,int);
static void npreal_do_session_recovery(struct npreal_struct *);
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,1,0))
static void npreal_wait_until_sent(struct tty_struct *,int);
#endif
static int npreal_wait_and_set_command(struct nd_struct *,char,char);
static int npreal_wait_command_completed(struct nd_struct *,char,char, long,char *,int *);
static long npreal_wait_oqueue(struct npreal_struct *,long);
static int npreal_linectrl(struct nd_struct *nd,int modem_control);
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,6,27))
static int npreal_break(struct tty_struct * ttyinfo, int break_state);
#else
static void npreal_break(struct tty_struct * ttyinfo, int break_state);
#endif
static void npreal_start_break(struct nd_struct *nd);
static void npreal_stop_break(struct nd_struct *nd);
static int npreal_setxon_xoff(struct npreal_struct * info, int cmd);
/*
* File operation declarations
*/
static int npreal_net_open(struct inode *, struct file * );
#if (LINUX_VERSION_CODE > VERSION_CODE(2,6,35))
/* /include/linux/fs.h modification */
static long npreal_net_ioctl(struct file *,unsigned int, unsigned long );
#else
static int npreal_net_ioctl(struct inode *,struct file *,unsigned int, unsigned long );
#endif
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,1,0))
static int npreal_net_close(struct inode *,struct file * );
static ssize_t npreal_net_read (struct file *file,char *buf,size_t count, loff_t *ppos);
static ssize_t npreal_net_write(struct file *file,const char *buf, size_t count,loff_t *ppos);
static unsigned int npreal_net_select(struct file *file, struct poll_table_struct *);
#else
static void npreal_net_close(struct inode *,struct file * );
static int npreal_net_read (struct inode *,struct file *,char *,int);
static int npreal_net_write(struct inode *,struct file *,const char *,int);
static int npreal_net_select(struct inode *,struct file *file,int, select_table *);
#endif
/*
* "proc" table manipulation functions
*/
#if (LINUX_VERSION_CODE < VERSION_CODE(3,10,0))
static struct proc_dir_entry *npreal_create_proc_entry(const char *, mode_t, struct proc_dir_entry *);
static void npreal_remove_proc_entry( struct proc_dir_entry *);
#else
static void npreal_remove_proc_entry( struct proc_dir_entry *, int idx);
#endif
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,6,0))
static struct tty_operations mpvar_ops =
{
.open = npreal_open,
.close = npreal_close,
.write = npreal_write,
.put_char = npreal_put_char,
.flush_chars = npreal_flush_chars,
.write_room = npreal_write_room,
.chars_in_buffer = npreal_chars_in_buffer,
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,6,26))
.flush_buffer = npreal_ldisc_flush_buffer,
.wait_until_sent = npreal_wait_until_sent,
.break_ctl = npreal_break,
#else
.flush_buffer = npreal_flush_buffer,
#endif
.ioctl = npreal_ioctl,
.throttle = npreal_throttle,
.unthrottle = npreal_unthrottle,
.set_termios = npreal_set_termios,
.stop = npreal_stop,
.start = npreal_start,
.hangup = npreal_hangup,
.tiocmget = npreal_tiocmget,
.tiocmset = npreal_tiocmset,
};
#endif
/*
* The MOXA NPort server Real TTY driver boot-time initialization code!
*/
#ifdef MODULE
INIT_FUNC_RET INIT_FUNC(void)
{
int ret;
DBGPRINT(MX_DEBUG_INFO, "Loading module npreal major(%d), coutmajor(%d)...\n", ttymajor, calloutmajor);
ret = npreal_init();
DBGPRINT(MX_DEBUG_INFO, "Done.\n");
return (ret);
}
CLEAR_FUNC_RET CLEAR_FUNC(void)
{
int i,err = 0;
struct npreal_struct *info;
struct proc_dir_entry *de;
info = &npvar_table[0];
for (i = 0; i < NPREAL_PORTS; i++,info++)
{
if (info->net_node)
{
#if (LINUX_VERSION_CODE >= VERSION_CODE(3,7,0))
/* Remove device node if it is opened*/
if(info->net_node->flag & NPREAL_NET_NODE_OPENED)
tty_unregister_device(DRV_VAR, i);
#endif
if ((de=((struct nd_struct *)(info->net_node))->node_entry))
#if (LINUX_VERSION_CODE < VERSION_CODE(3,10,0))
npreal_remove_proc_entry(de);
#else
npreal_remove_proc_entry(de, i);
#endif
((struct nd_struct *)(info->net_node))->node_entry = NULL;
}
}
if (npvar_proc_root)
{
#if (LINUX_VERSION_CODE < VERSION_CODE(3,10,0))
npreal_remove_proc_entry( npvar_proc_root);
#else
npreal_remove_proc_entry( npvar_proc_root, 404);
#endif
npvar_proc_root = NULL;
}
DBGPRINT(MX_DEBUG_INFO, "Unloading module npreal ...\n");
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,0))
if ((err |= tty_unregister_driver(&npvar_cdriver)))
{
DBGPRINT(MX_DEBUG_ERROR, "Couldn't unregister MOXA Async/NPort server family Real TTY callout driver\n");
}
#endif
if ((err |= tty_unregister_driver(DRV_VAR)))
{
DBGPRINT(MX_DEBUG_ERROR, "Couldn't unregister MOXA Async/NPort server family Real TTY driver\n");
}
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,6,0))
put_tty_driver(DRV_VAR);
#endif
DBGPRINT(MX_DEBUG_INFO, "Done.\n");
}
#endif
static int
npreal_init_tty(void)
{
struct npreal_struct *tty_node;
int i;
struct proc_dir_entry *de;
struct nd_struct *net_node;
char buf[4];
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,4,0))
init_MUTEX(&npvar_tmp_buf_sem);
#else
npvar_tmp_buf_sem = MUTEX;
#endif
//create "npreal2" dir
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,6,26))
npvar_proc_root = proc_mkdir("npreal2", NULL);
#else
npvar_proc_root = proc_mkdir("npreal2", &proc_root);
#endif
//npvar_proc_root = npreal_create_proc_entry( "npreal2",S_IFDIR, &proc_root);
if ( !npvar_proc_root )
return -ENOMEM;
tty_node = &npvar_table[0];
net_node = &npvar_net_nodes[0];
for ( i=0; i<NPREAL_PORTS; i++, tty_node++,net_node++ )
{
sprintf(buf,"%d",i);
#if (LINUX_VERSION_CODE < VERSION_CODE(3,10,0))
de = npreal_create_proc_entry(buf, S_IRUGO | S_IWUGO | S_IFREG,
npvar_proc_root);
if ( !de )
return -ENOMEM;
de->data = (void *) net_node;
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,4,0))
de->proc_fops = &npreal_net_fops;
#else
de->ops = &npreal_net_iops;
#endif /* 2,4,0 */
net_node->tty_node = tty_node;
net_node->node_entry = de;
net_node->flag = 0;
#else
de = proc_create_data(buf, S_IRUGO | S_IWUGO | S_IFREG,
npvar_proc_root, &npreal_net_fops, (void *) net_node);
if ( !de )
return -ENOMEM;
// PDE_DATA(de) = (void *) net_node;
net_node->tty_node = tty_node;
net_node->node_entry = de;
net_node->flag = 0;
#endif /* 3,10, 0 */
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,4,0))
init_MUTEX(&net_node->semaphore);
init_MUTEX(&net_node->cmd_semaphore);
init_waitqueue_head(&net_node->initialize_wait);
init_waitqueue_head(&net_node->select_in_wait);
init_waitqueue_head(&net_node->select_out_wait);
init_waitqueue_head(&net_node->select_ex_wait);
init_waitqueue_head(&net_node->cmd_rsp_wait);
#else
net_node->semaphore = MUTEX;
net_node->cmd_semaphore = MUTEX;
#endif
tty_node->net_node = net_node;
tty_node->port = i;
tty_node->type = PORT_16550A;
tty_node->flags = 0;
tty_node->xmit_fifo_size = 16;
tty_node->baud_base = 921600L;
tty_node->close_delay = 5*HZ/10;
tty_node->closing_wait = 30*HZ;
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,20))
INIT_WORK(&tty_node->tqueue, npreal_do_softint, tty_node);
INIT_WORK(&tty_node->process_flip_tqueue, npreal_flush_to_ldisc, tty_node);
#else
INIT_WORK(&tty_node->tqueue, npreal_do_softint);
INIT_WORK(&tty_node->process_flip_tqueue, npreal_flush_to_ldisc);
#endif
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,0))
tty_node->callout_termios = npvar_cdriver.init_termios;
#endif
tty_node->normal_termios = DRV_VAR_P(init_termios);
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,4,0))
//init_MUTEX(&tty_node->tx_lock);
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,39))
tty_node->tx_lock = SPIN_LOCK_UNLOCKED;
#else
tty_node->tx_lock = __SPIN_LOCK_UNLOCKED(tty_node->tx_lock);
#endif
init_MUTEX(&tty_node->rx_semaphore);
init_waitqueue_head(&tty_node->open_wait);
init_waitqueue_head(&tty_node->close_wait);
init_waitqueue_head(&tty_node->delta_msr_wait);
#else
tty_node->tx_lock = MUTEX;
tty_node->rx_semaphore = MUTEX;
tty_node->modem_control = 0;
#endif
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,1,0))
tty_node->icount.rx = tty_node->icount.tx = 0;
#endif
tty_node->icount.cts = tty_node->icount.dsr = tty_node->icount.dcd = 0;
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,1,0))
tty_node->icount.frame = tty_node->icount.overrun =
tty_node->icount.brk = tty_node->icount.parity = 0;
#endif
}
return 0;
}
int
npreal_init(void)
{
int ret1, ret2;
#if (LINUX_VERSION_CODE >= VERSION_CODE(3,7,0))
int i;
#endif
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,6,0))
npvar_sdriver = alloc_tty_driver(NPREAL_PORTS+1);
if (!npvar_sdriver)
return -ENOMEM;
#endif
printk("MOXA Async/NPort server family Real TTY driver ttymajor %d calloutmajor %d verbose %d (%s)\n", ttymajor, calloutmajor, verbose, NPREAL_VERSION);
/* Initialize the tty_driver structure */
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,28))
memset(DRV_VAR, 0, sizeof(struct tty_driver));
DRV_VAR_P(magic) = TTY_DRIVER_MAGIC;
DRV_VAR_P(num) = NPREAL_PORTS;
#endif
DRV_VAR_P(name) = "ttyr";
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,6,0))
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,18))
DRV_VAR_P(devfs_name) = "tts/r";
#endif
#endif
DRV_VAR_P(major) = ttymajor;
DRV_VAR_P(minor_start) = 0;
DRV_VAR_P(type) = TTY_DRIVER_TYPE_SERIAL;
DRV_VAR_P(subtype) = SERIAL_TYPE_NORMAL;
DRV_VAR_P(init_termios) = tty_std_termios;
DRV_VAR_P(init_termios.c_cflag) = B9600|CS8|CREAD|HUPCL|CLOCAL;
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,18))
DRV_VAR_P(flags) = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
#else
DRV_VAR_P(flags) = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
#endif
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,6,0))
tty_set_operations(DRV_VAR, &mpvar_ops);
#if (LINUX_VERSION_CODE < VERSION_CODE(3,7,0))
DRV_VAR_P(ttys) = npvar_tty;
#endif
#else
DRV_VAR_P(refcount) = &npvar_refcount;
DRV_VAR_P(table) = npvar_tty;
#endif
#if (LINUX_VERSION_CODE < VERSION_CODE(3,7,0))
DRV_VAR_P(termios) = npvar_termios;
#endif
#if (LINUX_VERSION_CODE < VERSION_CODE(3,3,0))
DRV_VAR_P(termios_locked) = npvar_termios_locked;
#endif
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,26))
DRV_VAR_P(open) = npreal_open;
DRV_VAR_P(close) = npreal_close;
DRV_VAR_P(write) = npreal_write;
DRV_VAR_P(put_char) = npreal_put_char;
DRV_VAR_P(flush_chars) = npreal_flush_chars;
DRV_VAR_P(write_room) = npreal_write_room;
DRV_VAR_P(chars_in_buffer) = npreal_chars_in_buffer;
DRV_VAR_P(flush_buffer) = npreal_ldisc_flush_buffer;
// DRV_VAR_P(flush_buffer) = npreal_flush_buffer;
DRV_VAR_P(ioctl) = npreal_ioctl;
DRV_VAR_P(throttle) = npreal_throttle;
DRV_VAR_P(unthrottle) = npreal_unthrottle;
DRV_VAR_P(set_termios) = npreal_set_termios;
DRV_VAR_P(stop) = npreal_stop;
DRV_VAR_P(start) = npreal_start;
DRV_VAR_P(hangup) = npreal_hangup;
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,1,0))
DRV_VAR_P(wait_until_sent) = npreal_wait_until_sent;
#endif
DRV_VAR_P(break_ctl) = npreal_break;
#endif
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,0))
/*
* The callout device is just like normal device except for
* major number and the subtype code.
*/
npvar_cdriver = npvar_sdriver;
npvar_cdriver.name = "cur";
npvar_cdriver.major = calloutmajor;
npvar_cdriver.subtype = SERIAL_TYPE_CALLOUT;
#endif
DBGPRINT(MX_DEBUG_INFO, "Tty devices major number = %d, callout devices major number = %d\n",ttymajor,calloutmajor);
npvar_diagflag = 0;
memset(npvar_table, 0, NPREAL_PORTS * sizeof(struct npreal_struct));
#if (LINUX_VERSION_CODE >= VERSION_CODE(3,7,0))
for(i = 0; i < NPREAL_PORTS;i++)
{
tty_port_init(&npvar_table[i].ttyPort);
tty_port_link_device(&npvar_table[i].ttyPort, npvar_sdriver, i);
}
#endif
/*register driver*/
ret1 = 0;
ret2 = 0;
if ( !(ret1=tty_register_driver(DRV_VAR)) )
{
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,0))
if ( (ret2=tty_register_driver(&npvar_cdriver)) )
{
tty_unregister_driver(DRV_VAR);
DBGPRINT(MX_DEBUG_ERROR, "Couldn't install MOXA Async/NPort server family Real TTY callout driver !\n");
}
#endif
}
else
{
DBGPRINT(MX_DEBUG_ERROR, "Couldn't install MOXA Async/NPort server family driver !\n");
}
if (ret1 || ret2)
{
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,6,0))
put_tty_driver(DRV_VAR);
#endif
return -1;
}
/* Initialize the net node structure */
memset(&npreal_net_fops,0,sizeof(struct file_operations));
npreal_net_fops.read = npreal_net_read;
npreal_net_fops.write = npreal_net_write;
#if (LINUX_VERSION_CODE > VERSION_CODE(2,6,35))
npreal_net_fops.unlocked_ioctl = npreal_net_ioctl;
#else
npreal_net_fops.ioctl = npreal_net_ioctl;
#endif
npreal_net_fops.open = npreal_net_open;
npreal_net_fops.release = npreal_net_close;
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,4,0))
npreal_net_fops.poll = npreal_net_select;
#else
#if (LINUX_VERSION_CODE >= VERSION_CODE(2,1,0))
npreal_net_fops.poll = npreal_net_select;
memset(&npreal_net_iops,0,sizeof(struct inode_operations));
npreal_net_iops.default_file_ops = &npreal_net_fops;
#else
npreal_net_fops.select = npreal_net_select;
memset(&npreal_net_iops,0,sizeof(struct inode_operations));
npreal_net_iops.default_file_ops = &npreal_net_fops;
#endif
#endif
if (npreal_init_tty() != 0)
{
tty_unregister_driver(DRV_VAR);
#if (LINUX_VERSION_CODE < VERSION_CODE(2,6,0))
tty_unregister_driver(&npvar_cdriver);
#endif
DBGPRINT(MX_DEBUG_ERROR, "Couldn't install MOXA Async/NPort server family Real TTY driver !\n");
}
return(0);
}
static void npreal_disconnect(struct nd_struct *nd, char *buf, int *size)
{
nd->cmd_buffer[0] = 0;
npreal_wait_and_set_command(nd,
NPREAL_LOCAL_COMMAND_SET,
LOCAL_CMD_TTY_UNUSED);
nd->cmd_buffer[2] = 0;
nd->cmd_ready = 1;
if (waitqueue_active(&nd->select_ex_wait)) {
wake_up_interruptible( &nd->select_ex_wait );
}
if (npreal_wait_command_completed(nd,
NPREAL_LOCAL_COMMAND_SET,
LOCAL_CMD_TTY_UNUSED,
NPREAL_CMD_TIMEOUT,
buf,
size) != 0) {
npreal_wait_and_set_command(nd,
NPREAL_LOCAL_COMMAND_SET,
LOCAL_CMD_TTY_UNUSED);
nd->cmd_buffer[2] = 0;
nd->cmd_ready = 1;
if (waitqueue_active(&nd->select_ex_wait)) {
wake_up_interruptible( &nd->select_ex_wait );
}
npreal_wait_command_completed(nd,
NPREAL_LOCAL_COMMAND_SET,
LOCAL_CMD_TTY_UNUSED,
NPREAL_CMD_TIMEOUT,