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/*********************************************************************
 *                
 * 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 Tromsų admit liability nor
 *     provide warranty for any of this software. This material is 
 *     provided "AS-IS" and at no charge.
 *     
 ********************************************************************/
 
#include <linux/config.h>
#include <linux/mm.h>
#include <linux/ctype.h>
#include <linux/sysctl.h>
#include <asm/segment.h>
 
#include <net/irda/irda.h>
#include <net/irda/irias_object.h>
 
#define NET_IRDA 412 /* Random number */
enum { DISCOVERY=1, DEVNAME, DEBUG, FAST_POLL, DISCOVERY_SLOTS,
       DISCOVERY_TIMEOUT, SLOT_TIMEOUT, MAX_BAUD_RATE, MIN_TX_TURN_TIME,
       MAX_TX_DATA_SIZE, MAX_TX_WINDOW, MAX_NOREPLY_TIME, WARN_NOREPLY_TIME,
       LAP_KEEPALIVE_TIME };
 
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;
int         sysctl_compression = 0;
extern char sysctl_devname[];
extern int  sysctl_max_baud_rate;
extern int  sysctl_min_tx_turn_time;
extern int  sysctl_max_tx_data_size;
extern int  sysctl_max_tx_window;
extern int  sysctl_max_noreply_time;
extern int  sysctl_warn_noreply_time;
extern int  sysctl_lap_keepalive_time;
 
#ifdef CONFIG_IRDA_DEBUG
extern unsigned int irda_debug;
#endif
 
/* 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 = 0;
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, struct file *filp,
		      void *buffer, size_t *lenp)
{
	int ret;
 
	ret = proc_dostring(table, write, filp, buffer, lenp);
	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;
}
 
/* One file */
static ctl_table irda_table[] = {
	{ DISCOVERY, "discovery", &sysctl_discovery,
	  sizeof(int), 0644, NULL, &proc_dointvec },
	{ DEVNAME, "devname", sysctl_devname,
	  65, 0644, NULL, &do_devname, &sysctl_string},
#ifdef CONFIG_IRDA_DEBUG
        { DEBUG, "debug", &irda_debug,
	  sizeof(int), 0644, NULL, &proc_dointvec },
#endif
#ifdef CONFIG_IRDA_FAST_RR
        { FAST_POLL, "fast_poll_increase", &sysctl_fast_poll_increase,
	  sizeof(int), 0644, NULL, &proc_dointvec },
#endif
	{ DISCOVERY_SLOTS, "discovery_slots", &sysctl_discovery_slots,
	  sizeof(int), 0644, NULL, &proc_dointvec_minmax, &sysctl_intvec,
	  NULL, &min_discovery_slots, &max_discovery_slots },
	{ DISCOVERY_TIMEOUT, "discovery_timeout", &sysctl_discovery_timeout,
	  sizeof(int), 0644, NULL, &proc_dointvec },
	{ SLOT_TIMEOUT, "slot_timeout", &sysctl_slot_timeout,
	  sizeof(int), 0644, NULL, &proc_dointvec_minmax, &sysctl_intvec,
	  NULL, &min_slot_timeout, &max_slot_timeout },
	{ MAX_BAUD_RATE, "max_baud_rate", &sysctl_max_baud_rate,
	  sizeof(int), 0644, NULL, &proc_dointvec_minmax, &sysctl_intvec,
	  NULL, &min_max_baud_rate, &max_max_baud_rate },
	{ MIN_TX_TURN_TIME, "min_tx_turn_time", &sysctl_min_tx_turn_time,
	  sizeof(int), 0644, NULL, &proc_dointvec_minmax, &sysctl_intvec,
	  NULL, &min_min_tx_turn_time, &max_min_tx_turn_time },
	{ MAX_TX_DATA_SIZE, "max_tx_data_size", &sysctl_max_tx_data_size,
	  sizeof(int), 0644, NULL, &proc_dointvec_minmax, &sysctl_intvec,
	  NULL, &min_max_tx_data_size, &max_max_tx_data_size },
	{ MAX_TX_WINDOW, "max_tx_window", &sysctl_max_tx_window,
	  sizeof(int), 0644, NULL, &proc_dointvec_minmax, &sysctl_intvec,
	  NULL, &min_max_tx_window, &max_max_tx_window },
	{ MAX_NOREPLY_TIME, "max_noreply_time", &sysctl_max_noreply_time,
	  sizeof(int), 0644, NULL, &proc_dointvec_minmax, &sysctl_intvec,
	  NULL, &min_max_noreply_time, &max_max_noreply_time },
	{ WARN_NOREPLY_TIME, "warn_noreply_time", &sysctl_warn_noreply_time,
	  sizeof(int), 0644, NULL, &proc_dointvec_minmax, &sysctl_intvec,
	  NULL, &min_warn_noreply_time, &max_warn_noreply_time },
	{ LAP_KEEPALIVE_TIME, "lap_keepalive_time", &sysctl_lap_keepalive_time,
	  sizeof(int), 0644, NULL, &proc_dointvec_minmax, &sysctl_intvec,
	  NULL, &min_lap_keepalive_time, &max_lap_keepalive_time },
	{ 0 }
};
 
/* One directory */
static ctl_table irda_net_table[] = {
	{ NET_IRDA, "irda", NULL, 0, 0555, irda_table },
	{ 0 }
};
 
/* The parent directory */
static ctl_table irda_root_table[] = {
	{ CTL_NET, "net", NULL, 0, 0555, irda_net_table },
	{ 0 }
};
 
static struct ctl_table_header *irda_table_header;
 
/*
 * Function irda_sysctl_register (void)
 *
 *    Register our sysctl interface
 *
 */
int irda_sysctl_register(void)
{
	irda_table_header = register_sysctl_table(irda_root_table, 0);
	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);
}