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/*
* Copyright 2012 Freescale Semiconductor, Inc.
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/module.h>
#include <linux/iram_alloc.h>
#include <linux/delay.h>
#include <mach/hardware.h>
#include <asm/io.h>
#include <asm/mach/map.h>
#include <mach/mvf.h>
#include "crm_regs.h"
struct cpu_op *(*get_cpu_op)(int *op);
bool enable_wait_mode;
void __iomem *gpc_base;
void __iomem *ccm_base;
static int cpu_silicon_rev = -1;
#define SI_REV_OFFSET 0x80
static int get_mvf_srev(void)
{
void __iomem *romcp = ioremap(BOOT_ROM_BASE_ADDR, SZ_8K);
u32 rev;
if (!romcp) {
cpu_silicon_rev = -EINVAL;
return 0;
}
rev = __raw_readl(romcp + SI_REV_OFFSET);
rev &= 0xff;
iounmap(romcp);
if (rev == 0x10)
return IMX_CHIP_REVISION_1_0;
else if (rev == 0x11)
return IMX_CHIP_REVISION_1_1;
else if (rev == 0x20)
return IMX_CHIP_REVISION_2_0;
return 0;
}
/*
* Returns:
* the silicon revision of the cpu
* -EINVAL - not a mvf
*/
int mvf_revision(void)
{
if (cpu_silicon_rev == -1)
cpu_silicon_rev = get_mvf_srev();
return cpu_silicon_rev;
}
EXPORT_SYMBOL(mvf_revision);
static int __init post_cpu_init(void)
{
iram_init(MVF_IRAM_BASE_ADDR, MVF_IRAM_SIZE);
/* Move wait routine into iRAM */
ccm_base = MVF_IO_ADDRESS(MVF_CCM_BASE_ADDR);
return 0;
}
postcore_initcall(post_cpu_init);
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