67 lines
2.0 KiB
C
67 lines
2.0 KiB
C
/*
|
|
* (C) Copyright 2010 TomTom BV <http://www.tomtom.com>
|
|
* Author: Matthias Kaehlcke <matthias.kaehlcke@tomtom.com>
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/*
|
|
* Detect the boot mode evaluating the PRM_RSTTST and a register in the
|
|
* scratchpad holding a magic value on software reset
|
|
*/
|
|
|
|
#include <asm/io.h>
|
|
#include <common.h>
|
|
|
|
#define BOOT_MODE_AUX_REG (OMAP34XX_CTRL_BASE + 0x09FC)
|
|
#define BOOT_MODE_AUX_MASK 0x3fffffff
|
|
#define BOOT_MODE_AUX_MAGIC 0x3eafc35b
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
void detect_boot_mode(void)
|
|
{
|
|
u32 val = __raw_readl(PRM_RSTTST);
|
|
|
|
if (val & GLOBAL_COLD_RST) {
|
|
/* cold boot or software reset */
|
|
|
|
val = __raw_readl(BOOT_MODE_AUX_REG);
|
|
|
|
if ((val & BOOT_MODE_AUX_MASK) == BOOT_MODE_AUX_MAGIC) {
|
|
/* the register contains the magic value => software reset */
|
|
gd->tomtom.sysboot_mode = SYSBOOT_MODE_WARM;
|
|
} else {
|
|
gd->tomtom.sysboot_mode = SYSBOOT_MODE_COLD;
|
|
|
|
/* write the magic value to the register */
|
|
val = ((val & ~BOOT_MODE_AUX_MASK) | BOOT_MODE_AUX_MAGIC);
|
|
__raw_writel(val, BOOT_MODE_AUX_REG);
|
|
}
|
|
} else if (val & MPU_WD_RST) {
|
|
gd->tomtom.sysboot_mode = SYSBOOT_MODE_WATCHDOG;
|
|
} else {
|
|
/* treat any other case as watchdog reset */
|
|
gd->tomtom.sysboot_mode = SYSBOOT_MODE_WATCHDOG;
|
|
}
|
|
|
|
/* reset all bits in PRM_RSTTST */
|
|
__raw_writel(0xFFFFFFFF, PRM_RSTTST);
|
|
}
|