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/*
* $Id$
*
* Copyright (C) 2007 OpenWrt.org
* Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
*
* 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 <asm/bootinfo.h>
#include <asm/addrspace.h>
#include <asm/mach-adm5120/adm5120_info.h>
#include <asm/mach-adm5120/adm5120_defs.h>
#include <asm/mach-adm5120/adm5120_switch.h>
unsigned int adm5120_product_code;
unsigned int adm5120_revision;
unsigned int adm5120_package;
unsigned int adm5120_nand_boot;
unsigned long adm5120_speed;
#define SWITCH_READ(r) *(u32 *)(KSEG1ADDR(ADM5120_SWITCH_BASE)+(r))
#define SWITCH_WRITE(r,v) *(u32 *)(KSEG1ADDR(ADM5120_SWITCH_BASE)+(r))=(v)
/*
* CPU settings detection
*/
#define CODE_GET_PC(c) ((c) & CODE_PC_MASK)
#define CODE_GET_REV(c) (((c) >> CODE_REV_SHIFT) & CODE_REV_MASK)
#define CODE_GET_PK(c) (((c) >> CODE_PK_SHIFT) & CODE_PK_MASK)
#define CODE_GET_CLKS(c) (((c) >> CODE_CLKS_SHIFT) & CODE_CLKS_MASK)
#define CODE_GET_NAB(c) (((c) & CODE_NAB) != 0)
void adm5120_ndelay(u32 ns)
{
u32 t;
SWITCH_WRITE(SWITCH_REG_TIMER, TIMER_PERIOD_DEFAULT);
SWITCH_WRITE(SWITCH_REG_TIMER_INT, (TIMER_INT_TOS | TIMER_INT_TOM));
t = (ns+640) / 640;
t &= TIMER_PERIOD_MASK;
SWITCH_WRITE(SWITCH_REG_TIMER, t | TIMER_TE);
/* wait until the timer expires */
do {
t = SWITCH_READ(SWITCH_REG_TIMER_INT);
} while ((t & TIMER_INT_TOS) == 0);
/* leave the timer disabled */
SWITCH_WRITE(SWITCH_REG_TIMER, TIMER_PERIOD_DEFAULT);
SWITCH_WRITE(SWITCH_REG_TIMER_INT, (TIMER_INT_TOS | TIMER_INT_TOM));
}
void __init adm5120_soc_init(void)
{
u32 code;
u32 clks;
code = SWITCH_READ(SWITCH_REG_CODE);
adm5120_product_code = CODE_GET_PC(code);
adm5120_revision = CODE_GET_REV(code);
adm5120_package = (CODE_GET_PK(code) == CODE_PK_BGA) ?
ADM5120_PACKAGE_BGA : ADM5120_PACKAGE_PQFP;
adm5120_nand_boot = CODE_GET_NAB(code);
clks = CODE_GET_CLKS(code);
adm5120_speed = ADM5120_SPEED_175;
if (clks & 1)
adm5120_speed += 25000000;
if (clks & 2)
adm5120_speed += 50000000;
}
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