[J-u-boot.git] / drivers / bootcount / bootcount_davinci.c

/*
 * (C) Copyright 2011
 * Heiko Schocher, DENX Software Engineering, [email protected].
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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.
 *
 */

#include <bootcount.h>
#include <asm/arch/da850_lowlevel.h>
#include <asm/arch/davinci_misc.h>

void bootcount_store(ulong a)
{
	struct davinci_rtc *reg =
		(struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR;

	/*
	 * write RTC kick register to enable write
	 * for RTC Scratch registers. Scratch0 and 1 are
	 * used for bootcount values.
	 */
	writel(RTC_KICK0R_WE, &reg->kick0r);
	writel(RTC_KICK1R_WE, &reg->kick1r);
	raw_bootcount_store(&reg->scratch0, a);
	raw_bootcount_store(&reg->scratch1, BOOTCOUNT_MAGIC);
}

ulong bootcount_load(void)
{
	struct davinci_rtc *reg =
		(struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR;

	if (raw_bootcount_load(&reg->scratch1) != BOOTCOUNT_MAGIC)
		return 0;
	else
		return raw_bootcount_load(&reg->scratch0);
}
Commit	Line	Data
0044c42e SR	1	/*
	2	* (C) Copyright 2011
	3	* Heiko Schocher, DENX Software Engineering, [email protected].
	4	*
	5	* See file CREDITS for list of people who contributed to this
	6	* project.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of
	11	* the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	*/
	19
	20	#include <bootcount.h>
	21	#include <asm/arch/da850_lowlevel.h>
	22	#include <asm/arch/davinci_misc.h>
	23
	24	void bootcount_store(ulong a)
	25	{
	26	struct davinci_rtc *reg =
	27	(struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR;
	28
	29	/*
	30	* write RTC kick register to enable write
	31	* for RTC Scratch registers. Scratch0 and 1 are
	32	* used for bootcount values.
	33	*/
	34	writel(RTC_KICK0R_WE, &reg->kick0r);
	35	writel(RTC_KICK1R_WE, &reg->kick1r);
	36	raw_bootcount_store(&reg->scratch0, a);
	37	raw_bootcount_store(&reg->scratch1, BOOTCOUNT_MAGIC);
	38	}
	39
	40	ulong bootcount_load(void)
	41	{
	42	struct davinci_rtc *reg =
	43	(struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR;
	44
	45	if (raw_bootcount_load(&reg->scratch1) != BOOTCOUNT_MAGIC)
	46	return 0;
	47	else
	48	return raw_bootcount_load(&reg->scratch0);
	49	}