/* Periodic Interval Timer Implementation for OpenPCD
 * (C) 2006 by Harald Welte <hwelte@hmw-consulting.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 <errno.h>
#include <sys/types.h>
#include <lib_AT91SAM7.h>
#include <AT91SAM7.h>
#include "../openpcd.h"

/* PIT runs at MCK/16 (= 3MHz) */
#define PIV_MS(x)		(x * 3000)

static void pit_irq(void)
{
	/* FIXME: do something */	
}

void pit_mdelay(u_int32_t ms)
{
	u_int32_t end;

	end = (AT91F_PITGetPIIR(AT91C_BASE_PITC) + ms) % 20;

	while (end < AT91F_PITGetPIIR(AT91C_BASE_PITC)) { }
}

void pit_init(void)
{
	AT91F_PITC_CfgPMC();

	AT91F_PITInit(AT91C_BASE_PITC, 1000 /* uS */, 48 /* MHz */);

	AT91F_AIC_ConfigureIt(AT91C_BASE_AIC, AT91C_ID_SYS,
			      OPENPCD_IRQ_PRIO_PIT,
			      AT91C_AIC_SRCTYPE_INT_POSITIVE_EDGE,
			      &pit_irq);

	//AT91F_PITEnableInt(AT91C_BASE_PITC);
}