arch/arm/mach-omap2/sdrc.c

/*
 * SMS/SDRC (SDRAM controller) common code for OMAP2/3
 *
 * Copyright (C) 2005, 2008 Texas Instruments Inc.
 * Copyright (C) 2005, 2008 Nokia Corporation
 *
 * Tony Lindgren <tony@atomide.com>
 * Paul Walmsley
 * Richard Woodruff <r-woodruff2@ti.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/io.h>

#include <mach/common.h>
#include <mach/clock.h>
#include <mach/sram.h>

#include "prm.h"

#include <mach/sdrc.h>
#include "sdrc.h"

void __iomem *omap2_sdrc_base;
void __iomem *omap2_sms_base;

void __init omap2_set_globals_sdrc(struct omap_globals *omap2_globals)
{
	omap2_sdrc_base = omap2_globals->sdrc;
	omap2_sms_base = omap2_globals->sms;
}

/* turn on smart idle modes for SDRAM scheduler and controller */
void __init omap2_sdrc_init(void)
{
	u32 l;

	l = sms_read_reg(SMS_SYSCONFIG);
	l &= ~(0x3 << 3);
	l |= (0x2 << 3);
	sms_write_reg(l, SMS_SYSCONFIG);

	l = sdrc_read_reg(SDRC_SYSCONFIG);
	l &= ~(0x3 << 3);
	l |= (0x2 << 3);
	sdrc_write_reg(l, SDRC_SYSCONFIG);
}