/*********************************************************************

   *

   * Filename:      irsysctl.c
   * Version:       1.0
   * Description:   Sysctl interface for IrDA
   * Status:        Experimental.
   * Author:        Dag Brattli <dagb@cs.uit.no>
   * Created at:    Sun May 24 22:12:06 1998
   * Modified at:   Fri Jun  4 02:50:15 1999
   * Modified by:   Dag Brattli <dagb@cs.uit.no>

   *

   *     Copyright (c) 1997, 1999 Dag Brattli, All Rights Reserved.
   *     Copyright (c) 2000-2001 Jean Tourrilhes <jt@hpl.hp.com>

   *
   *     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.

   *

   *     Neither Dag Brattli nor University of Tromsø admit liability nor

   *     provide warranty for any of this software. This material is

   *     provided "AS-IS" and at no charge.

   *

   ********************************************************************/

  #include <linux/mm.h>
  #include <linux/ctype.h>
  #include <linux/sysctl.h>
  #include <linux/init.h>
  
  #include <net/irda/irda.h>		/* irda_debug */

  #include <net/irda/irlmp.h>
  #include <net/irda/timer.h>

  #include <net/irda/irias_object.h>

  extern int  sysctl_discovery;
  extern int  sysctl_discovery_slots;
  extern int  sysctl_discovery_timeout;
  extern int  sysctl_slot_timeout;
  extern int  sysctl_fast_poll_increase;
  extern char sysctl_devname[];
  extern int  sysctl_max_baud_rate;

  extern unsigned int sysctl_min_tx_turn_time;
  extern unsigned int sysctl_max_tx_data_size;
  extern unsigned int sysctl_max_tx_window;

  extern int  sysctl_max_noreply_time;
  extern int  sysctl_warn_noreply_time;
  extern int  sysctl_lap_keepalive_time;

  extern struct irlmp_cb *irlmp;

  /* this is needed for the proc_dointvec_minmax - Jean II */
  static int max_discovery_slots = 16;		/* ??? */
  static int min_discovery_slots = 1;
  /* IrLAP 6.13.2 says 25ms to 10+70ms - allow higher since some devices
   * seems to require it. (from Dag's comment) */
  static int max_slot_timeout = 160;
  static int min_slot_timeout = 20;
  static int max_max_baud_rate = 16000000;	/* See qos.c - IrLAP spec */
  static int min_max_baud_rate = 2400;
  static int max_min_tx_turn_time = 10000;	/* See qos.c - IrLAP spec */
  static int min_min_tx_turn_time;
  static int max_max_tx_data_size = 2048;		/* See qos.c - IrLAP spec */
  static int min_max_tx_data_size = 64;
  static int max_max_tx_window = 7;		/* See qos.c - IrLAP spec */
  static int min_max_tx_window = 1;
  static int max_max_noreply_time = 40;		/* See qos.c - IrLAP spec */
  static int min_max_noreply_time = 3;
  static int max_warn_noreply_time = 3;		/* 3s == standard */
  static int min_warn_noreply_time = 1;		/* 1s == min WD_TIMER */
  static int max_lap_keepalive_time = 10000;	/* 10s */
  static int min_lap_keepalive_time = 100;	/* 100us */
  /* For other sysctl, I've no idea of the range. Maybe Dag could help
   * us on that - Jean II */

  static int do_devname(ctl_table *table, int write,

  		      void __user *buffer, size_t *lenp, loff_t *ppos)
  {
  	int ret;

  	ret = proc_dostring(table, write, buffer, lenp, ppos);

  	if (ret == 0 && write) {
  		struct ias_value *val;
  
  		val = irias_new_string_value(sysctl_devname);
  		if (val)
  			irias_object_change_attribute("Device", "DeviceName", val);
  	}
  	return ret;
  }

  static int do_discovery(ctl_table *table, int write,

                      void __user *buffer, size_t *lenp, loff_t *ppos)
  {
         int ret;

         ret = proc_dointvec(table, write, buffer, lenp, ppos);

         if (ret)
  	       return ret;
  
         if (irlmp == NULL)
  	       return -ENODEV;
  
         if (sysctl_discovery)
  	       irlmp_start_discovery_timer(irlmp, sysctl_discovery_timeout*HZ);
         else
  	       del_timer_sync(&irlmp->discovery_timer);
  
         return ret;
  }

  /* One file */
  static ctl_table irda_table[] = {
  	{

  		.procname	= "discovery",
  		.data		= &sysctl_discovery,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= do_discovery,

  	},
  	{

  		.procname	= "devname",
  		.data		= sysctl_devname,
  		.maxlen		= 65,
  		.mode		= 0644,

  		.proc_handler	= do_devname,

  	},
  #ifdef CONFIG_IRDA_DEBUG

  	{

  		.procname	= "debug",
  		.data		= &irda_debug,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec

  	},
  #endif
  #ifdef CONFIG_IRDA_FAST_RR

  	{

  		.procname	= "fast_poll_increase",
  		.data		= &sysctl_fast_poll_increase,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec

  	},
  #endif
  	{

  		.procname	= "discovery_slots",
  		.data		= &sysctl_discovery_slots,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_discovery_slots,
  		.extra2		= &max_discovery_slots
  	},
  	{

  		.procname	= "discovery_timeout",
  		.data		= &sysctl_discovery_timeout,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec

  	},
  	{

  		.procname	= "slot_timeout",
  		.data		= &sysctl_slot_timeout,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_slot_timeout,
  		.extra2		= &max_slot_timeout
  	},
  	{

  		.procname	= "max_baud_rate",
  		.data		= &sysctl_max_baud_rate,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_max_baud_rate,
  		.extra2		= &max_max_baud_rate
  	},
  	{

  		.procname	= "min_tx_turn_time",
  		.data		= &sysctl_min_tx_turn_time,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_min_tx_turn_time,
  		.extra2		= &max_min_tx_turn_time
  	},
  	{

  		.procname	= "max_tx_data_size",
  		.data		= &sysctl_max_tx_data_size,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_max_tx_data_size,
  		.extra2		= &max_max_tx_data_size
  	},
  	{

  		.procname	= "max_tx_window",
  		.data		= &sysctl_max_tx_window,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_max_tx_window,
  		.extra2		= &max_max_tx_window
  	},
  	{

  		.procname	= "max_noreply_time",
  		.data		= &sysctl_max_noreply_time,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_max_noreply_time,
  		.extra2		= &max_max_noreply_time
  	},
  	{

  		.procname	= "warn_noreply_time",
  		.data		= &sysctl_warn_noreply_time,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_warn_noreply_time,
  		.extra2		= &max_warn_noreply_time
  	},
  	{

  		.procname	= "lap_keepalive_time",
  		.data		= &sysctl_lap_keepalive_time,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_lap_keepalive_time,
  		.extra2		= &max_lap_keepalive_time
  	},

  	{ }

  };

  static struct ctl_path irda_path[] = {

  	{ .procname = "net", },
  	{ .procname = "irda", },

  	{ }

  };
  
  static struct ctl_table_header *irda_table_header;
  
  /*
   * Function irda_sysctl_register (void)
   *
   *    Register our sysctl interface
   *
   */
  int __init irda_sysctl_register(void)
  {

  	irda_table_header = register_sysctl_paths(irda_path, irda_table);

  	if (!irda_table_header)
  		return -ENOMEM;
  
  	return 0;
  }
  
  /*
   * Function irda_sysctl_unregister (void)
   *
   *    Unregister our sysctl interface
   *
   */

  void irda_sysctl_unregister(void)

  {
  	unregister_sysctl_table(irda_table_header);
  }