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/*
* (C) Copyright 2005-2007
* Samsung Electronics,
* Kyungmin Park <kyungmin.park@samsung.com>
*
* Derived from omap2420
*
* 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/arch/omap2420.h>
#include <asm/io.h>
#include <asm/arch/bits.h>
#include <asm/arch/mux.h>
#include <asm/arch/mem.h>
#include <asm/arch/clocks.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/sys_info.h>
#include "mem.h"
/************************************************************
* sdelay() - simple spin loop. Will be constant time as
* its generally used in 12MHz bypass conditions only. This
* is necessary until timers are accessible.
*
* not inline to increase chances its in cache when called
*************************************************************/
void sdelay(unsigned long loops)
{
__asm__ volatile ("1:\n" "subs %0, %1, #1\n"
"bne 1b":"=r" (loops):"0"(loops));
}
/*****************************************************************************
* prcm_init() - inits clocks for PRCM as defined in clocks.h
* (config II default). Called from SRAM, or Flash (using temp SRAM stack).
*****************************************************************************/
void prcm_init(void)
{
}
/**************************************************************************
* make_cs1_contiguous() - for es2 and above remap cs1 behind cs0 to allow
* command line mem=xyz use all memory with out discontigious support
* compiled in. Could do it at the ATAG, but there really is two banks...
* Called as part of 2nd phase DDR init.
**************************************************************************/
void make_cs1_contiguous(void)
{
u32 size, a_add_low, a_add_high;
size = get_sdr_cs_size(SDRC_CS0_OSET);
size /= SZ_32M; /* find size to offset CS1 */
a_add_high = (size & 3) << 8; /* set up low field */
a_add_low = (size & 0x3C) >> 2; /* set up high field */
__raw_writel((a_add_high | a_add_low), SDRC_CS_CFG);
}
/********************************************************
* mem_ok() - test used to see if timings are correct
* for a part. Helps in gussing which part
* we are currently using.
*******************************************************/
u32 mem_ok(void)
{
u32 val1, val2;
u32 pattern = 0x12345678;
__raw_writel(0x0, OMAP2420_SDRC_CS0 + 0x400); /* clear pos A */
__raw_writel(pattern, OMAP2420_SDRC_CS0); /* pattern to pos B */
__raw_writel(0x0, OMAP2420_SDRC_CS0 + 4); /* remove pattern off the bus */
val1 = __raw_readl(OMAP2420_SDRC_CS0 + 0x400); /* get pos A value */
val2 = __raw_readl(OMAP2420_SDRC_CS0); /* get val2 */
if ((val1 != 0) || (val2 != pattern)) /* see if pos A value changed */
return (0);
else
return (1);
}
/********************************************************
* sdrc_init() - init the sdrc chip selects CS0 and CS1
* - early init routines, called from flash or
* SRAM.
*******************************************************/
void sdrc_init(void)
{
#define EARLY_INIT 1
/* only init up first bank here */
do_sdrc_init(SDRC_CS0_OSET, EARLY_INIT);
}
/*************************************************************************
* do_sdrc_init(): initialize the SDRAM for use.
* -called from low level code with stack only.
* -code sets up SDRAM timing and muxing for 2422 or 2420.
* -optimal settings can be placed here, or redone after i2c
* inspection of board info
*
* This is a bit ugly, but should handle all memory moduels
* used with the APOLLON. The first time though this code from s_init()
* we configure the first chip select. Later on we come back and
* will configure the 2nd chip select if it exists.
*
**************************************************************************/
void do_sdrc_init(u32 offset, u32 early)
{
}
/*****************************************************
* gpmc_init(): init gpmc bus
* Init GPMC for x16, MuxMode (SDRAM in x32).
* This code can only be executed from SRAM or SDRAM.
*****************************************************/
void gpmc_init(void)
{
u32 mux = 0, mtype, mwidth, rev, tval;
rev = get_cpu_rev();
if (rev == CPU_2420_2422_ES1)
tval = 1;
else
tval = 0; /* disable bit switched meaning */
/* global settings */
__raw_writel(0x10, GPMC_SYSCONFIG); /* smart idle */
__raw_writel(0x0, GPMC_IRQENABLE); /* isr's sources masked */
__raw_writel(tval, GPMC_TIMEOUT_CONTROL); /* timeout disable */
#ifdef CFG_NAND_BOOT
__raw_writel(0x001, GPMC_CONFIG); /* set nWP, disable limited addr */
#else
__raw_writel(0x111, GPMC_CONFIG); /* set nWP, disable limited addr */
#endif
/* discover bus connection from sysboot */
if (is_gpmc_muxed() == GPMC_MUXED)
mux = BIT9;
mtype = get_gpmc0_type();
mwidth = get_gpmc0_width();
/* setup cs0 */
__raw_writel(0x0, GPMC_CONFIG7_0); /* disable current map */
sdelay(1000);
#ifdef CFG_NOR_BOOT
__raw_writel(APOLLON_24XX_GPMC_CONFIG1_3, GPMC_CONFIG1_0);
__raw_writel(APOLLON_24XX_GPMC_CONFIG2_3, GPMC_CONFIG2_0);
__raw_writel(APOLLON_24XX_GPMC_CONFIG3_3, GPMC_CONFIG3_0);
__raw_writel(APOLLON_24XX_GPMC_CONFIG4_3, GPMC_CONFIG4_0);
__raw_writel(APOLLON_24XX_GPMC_CONFIG5_3, GPMC_CONFIG5_0);
__raw_writel(APOLLON_24XX_GPMC_CONFIG6_3, GPMC_CONFIG6_0);
__raw_writel(APOLLON_24XX_GPMC_CONFIG7_3, GPMC_CONFIG7_0); #else
__raw_writel(APOLLON_24XX_GPMC_CONFIG1_0 | mux | mtype | mwidth,
GPMC_CONFIG1_0);
__raw_writel(APOLLON_24XX_GPMC_CONFIG2_0, GPMC_CONFIG2_0);
__raw_writel(APOLLON_24XX_GPMC_CONFIG3_0, GPMC_CONFIG3_0);
__raw_writel(APOLLON_24XX_GPMC_CONFIG4_0, GPMC_CONFIG4_0);
__raw_writel(APOLLON_24XX_GPMC_CONFIG5_0, GPMC_CONFIG5_0);
__raw_writel(APOLLON_24XX_GPMC_CONFIG6_0, GPMC_CONFIG6_0);
/* enable new mapping */
__raw_writel(APOLLON_24XX_GPMC_CONFIG7_0, GPMC_CONFIG7_0);
#endif
sdelay(2000);
/* setup cs1 */
__raw_writel(0, GPMC_CONFIG7_1); /* disable any mapping */
sdelay(1000);
__raw_writel(APOLLON_24XX_GPMC_CONFIG1_1, GPMC_CONFIG1_1);
__raw_writel(APOLLON_24XX_GPMC_CONFIG2_1, GPMC_CONFIG2_1);
__raw_writel(APOLLON_24XX_GPMC_CONFIG3_1, GPMC_CONFIG3_1);
__raw_writel(APOLLON_24XX_GPMC_CONFIG4_1, GPMC_CONFIG4_1);
__raw_writel(APOLLON_24XX_GPMC_CONFIG5_1, GPMC_CONFIG5_1);
__raw_writel(APOLLON_24XX_GPMC_CONFIG6_1, GPMC_CONFIG6_1);
__raw_writel(APOLLON_24XX_GPMC_CONFIG7_1, GPMC_CONFIG7_1);
sdelay(2000);
/* setup cs2 */
__raw_writel(APOLLON_24XX_GPMC_CONFIG1_0 | mux | mtype | mwidth,
GPMC_CONFIG1_2);
/* It's same as cs 0 */
__raw_writel(APOLLON_24XX_GPMC_CONFIG2_0, GPMC_CONFIG2_2);
__raw_writel(APOLLON_24XX_GPMC_CONFIG3_0, GPMC_CONFIG3_2);
__raw_writel(APOLLON_24XX_GPMC_CONFIG4_0, GPMC_CONFIG4_2);
__raw_writel(APOLLON_24XX_GPMC_CONFIG5_0, GPMC_CONFIG5_2);
__raw_writel(APOLLON_24XX_GPMC_CONFIG6_0, GPMC_CONFIG6_2);
#ifdef CFG_NOR_BOOT
__raw_writel(APOLLON_24XX_GPMC_CONFIG7_0, GPMC_CONFIG7_2);
#else
__raw_writel(APOLLON_24XX_GPMC_CONFIG7_2, GPMC_CONFIG7_2);
#endif
#ifndef CFG_NOR_BOOT
/* setup cs3 */
__raw_writel(0, GPMC_CONFIG7_3); /* disable any mapping */
sdelay(1000);
__raw_writel(APOLLON_24XX_GPMC_CONFIG1_3, GPMC_CONFIG1_3);
__raw_writel(APOLLON_24XX_GPMC_CONFIG2_3, GPMC_CONFIG2_3);
__raw_writel(APOLLON_24XX_GPMC_CONFIG3_3, GPMC_CONFIG3_3);
__raw_writel(APOLLON_24XX_GPMC_CONFIG4_3, GPMC_CONFIG4_3);
__raw_writel(APOLLON_24XX_GPMC_CONFIG5_3, GPMC_CONFIG5_3);
__raw_writel(APOLLON_24XX_GPMC_CONFIG6_3, GPMC_CONFIG6_3);
__raw_writel(APOLLON_24XX_GPMC_CONFIG7_3, GPMC_CONFIG7_3);
#endif
#ifndef ASYNC_NOR
__raw_writew(0xaa, (APOLLON_CS3_BASE + 0xaaa));
__raw_writew(0x55, (APOLLON_CS3_BASE + 0x554));
__raw_writew(0xc0, (APOLLON_CS3_BASE | SYNC_NOR_VALUE));
#endif
sdelay(2000);
}
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