/*
 * linux/arch/arm/mach-omap2/id.c
 *
 * OMAP2 CPU identification code
 *
 * Copyright (C) 2005 Nokia Corporation
 * Written by Tony Lindgren <tony@atomide.com>
 *
 * Copyright (C) 2009-11 Texas Instruments
 * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@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/init.h>
#include <linux/io.h>

#include <asm/cputype.h>

#include "common.h"

#include "id.h"

#include "soc.h"
#include "control.h"

#define OMAP4_SILICON_TYPE_STANDARD		0x01
#define OMAP4_SILICON_TYPE_PERFORMANCE		0x02

static unsigned int omap_revision;
static const char *cpu_rev;
u32 omap_features;

unsigned int omap_rev(void)
{
	return omap_revision;
}
EXPORT_SYMBOL(omap_rev);

int omap_type(void)
{
	u32 val = 0;

	if (cpu_is_omap24xx()) {
		val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
	} else if (soc_is_am33xx()) {
		val = omap_ctrl_readl(AM33XX_CONTROL_STATUS);
	} else if (cpu_is_omap34xx()) {
		val = omap_ctrl_readl(OMAP343X_CONTROL_STATUS);
	} else if (cpu_is_omap44xx()) {
		val = omap_ctrl_readl(OMAP4_CTRL_MODULE_CORE_STATUS);
	} else if (soc_is_omap54xx()) {
		val = omap_ctrl_readl(OMAP5XXX_CONTROL_STATUS);
		val &= OMAP5_DEVICETYPE_MASK;
		val >>= 6;
		goto out;
	} else {
		pr_err("Cannot detect omap type!\n");
		goto out;
	}

	val &= OMAP2_DEVICETYPE_MASK;
	val >>= 8;

out:
	return val;
}
EXPORT_SYMBOL(omap_type);


/*----------------------------------------------------------------------------*/

#define OMAP_TAP_IDCODE		0x0204
#define OMAP_TAP_DIE_ID_0	0x0218
#define OMAP_TAP_DIE_ID_1	0x021C
#define OMAP_TAP_DIE_ID_2	0x0220
#define OMAP_TAP_DIE_ID_3	0x0224

#define OMAP_TAP_DIE_ID_44XX_0	0x0200
#define OMAP_TAP_DIE_ID_44XX_1	0x0208
#define OMAP_TAP_DIE_ID_44XX_2	0x020c
#define OMAP_TAP_DIE_ID_44XX_3	0x0210

#define read_tap_reg(reg)	__raw_readl(tap_base  + (reg))

struct omap_id {
	u16	hawkeye;	/* Silicon type (Hawkeye id) */
	u8	dev;		/* Device type from production_id reg */
	u32	type;		/* Combined type id copied to omap_revision */
};

/* Register values to detect the OMAP version */