/**
 *
 *   Copyright (C) 2006 AVM GmbH <fritzbox_info@avm.de>
 *
 *   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/version.h>
#include <linux/init.h>
#include <asm/fcntl.h>
#include <asm/ioctl.h>
#include <asm/errno.h>
#include <asm/uaccess.h>
#include <linux/timer.h>
#include <linux/ar7wdt.h>

#if defined(CONFIG_MACH_PUMA7)	//PUMA7_ARM
#include <asm-arm/arch-avalanche/generic/pal.h>
#else
#include <mach/hw_timer.h>
#include <arch-avalanche/generic/pal.h>
#endif
#include "avm_sammel.h"

// #define AVM_WATCHDOG_DEBUG
#if defined(AVM_WATCHDOG_DEBUG)
#define DBG(args...)		pr_info(args)
#else /*--- #if defined(AVM_WATCHDOG_DEBUG) ---*/
#define DBG(args...)		no_printk(args)
#endif	/*--- #else ---*/		 /*--- #if defined(AVM_WATCHDOG_DEBUG) ---*/

/**
 */
int ar7wdt_hw_is_wdt_running(void)
{
	volatile PAL_SYS_WDTIMER_STRUCT_T *p_wdtimer = (volatile PAL_SYS_WDTIMER_STRUCT_T *)AVALANCHE_WATCHDOG_TIMER_BASE;

	return p_wdtimer->disable != 0;
}

/**
 * dummy
 */
void ar7wdt_hw_secure_wdt_disable(void)
{
}

/**
 */
void ar7wdt_hw_init(void)
{
	int result;

	// get the watchdog module out of reset and initialize watchdog timer
	PAL_sysResetCtrl(AVALANCHE_WDT_RESET, OUT_OF_RESET);
	PAL_sysWdtimerInit(AVALANCHE_WATCHDOG_TIMER_BASE, PAL_sysClkcGetFreq(PAL_SYS_CLKC_WDT));

	// disable watchdog timer
	result = PAL_sysWdtimerCtrl(AVALANCHE_WDT_DISABLE_VALUE);
	if (result) {
		pr_err("[%s] Disabling watchdog timer failed, aborting!\n", __func__);
		goto wdt_set_err;
	}
	// set default timeout value in ms
	result = PAL_sysWdtimerSetPeriod(AVALANCHE_WDT_MARGIN_MAX_VAL * 1000);
	if (result) {
		pr_err("[%s] setting watchdog timer to %d seconds failed, aborting!\n", __func__, AVALANCHE_WDT_MARGIN_MAX_VAL);
		goto wdt_set_err;
	}
	// re-enable watchdog
	result = PAL_sysWdtimerCtrl(AVALANCHE_WDT_ENABLE_VALUE);
	if (result) {
		pr_err("[%s] Re-enabling watchdog timer failed, aborting!\n", __func__);
		goto wdt_set_err;
	}
	// start watchdog by kicking it
	result = PAL_sysWdtimerKick();
	if (result) {
		pr_err("[%s] Kicking the watchdog timer failed!\n", __func__);
	}

wdt_set_err:
	return;
}

/**
 */
void ar7wdt_hw_deinit(void)
{
	int result;

	DBG("stopping WDT\n");

	result = PAL_sysWdtimerCtrl(AVALANCHE_WDT_DISABLE_VALUE);
	if (result) {
		pr_err("[%s] Disabling watchdog failed!\n", __func__);
	}
}

/**
 */
void ar7wdt_hw_reboot(void)
{
	DBG("%s!!\n", __func__);
	panic("%s: watchdog expired\n", __func__);
}

/**
 */
void ar7wdt_hw_trigger(void)
{
	int result;

	if (!ar7wdt_hw_is_wdt_running()) {
		return;
	}
	DBG("%s !!\n", __func__);

	result = PAL_sysWdtimerKick();
	if (result) {
		pr_err("[%s] Kicking the watchdog failed!\n", __func__);
	}
}
EXPORT_SYMBOL(ar7wdt_hw_trigger);