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/*
* (C) Copyright 2003
* Josef Baumgartner <josef.baumgartner@telex.de>
*
* MCF5282 additionals
* (C) Copyright 2005
* BuS Elektronik GmbH & Co. KG <esw@bus-elektronik.de>
*
* 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
*/
#include <common.h>
#include <watchdog.h>
#include <command.h>
#include <asm/immap.h>
#ifdef CONFIG_M5271
/*
* Both MCF5270 and MCF5271 are members of the MPC5271 family. Try to
* determine which one we are running on, based on the Chip Identification
* Register (CIR).
*/
int checkcpu(void)
{
char buf[32];
unsigned short cir; /* Chip Identification Register */
unsigned short pin; /* Part identification number */
unsigned char prn; /* Part revision number */
char *cpu_model;
cir = mbar_readShort(MCF_CCM_CIR);
pin = cir >> MCF_CCM_CIR_PIN_LEN;
prn = cir & MCF_CCM_CIR_PRN_MASK;
switch (pin) {
case MCF_CCM_CIR_PIN_MCF5270:
cpu_model = "5270";
break;
case MCF_CCM_CIR_PIN_MCF5271:
cpu_model = "5271";
break;
default:
cpu_model = NULL;
break;
}
if (cpu_model)
printf("CPU: Freescale ColdFire MCF%s rev. %hu, at %s MHz\n",
cpu_model, prn, strmhz(buf, CFG_CLK));
else
printf("CPU: Unknown - Freescale ColdFire MCF5271 family"
" (PIN: 0x%x) rev. %hu, at %s MHz\n",
pin, prn, strmhz(buf, CFG_CLK));
return 0;
}
int do_reset(cmd_tbl_t * cmdtp, bd_t * bd, int flag, int argc, char *argv[])
{
mbar_writeByte(MCF_RCM_RCR,
MCF_RCM_RCR_SOFTRST | MCF_RCM_RCR_FRCRSTOUT);
return 0;
};
#if defined(CONFIG_WATCHDOG)
void watchdog_reset(void)
{
mbar_writeShort(MCF_WTM_WSR, 0x5555);
mbar_writeShort(MCF_WTM_WSR, 0xAAAA);
}
int watchdog_disable(void)
{
mbar_writeShort(MCF_WTM_WCR, 0);
return (0);
}
int watchdog_init(void)
{
mbar_writeShort(MCF_WTM_WCR, MCF_WTM_WCR_EN);
return (0);
}
#endif /* #ifdef CONFIG_WATCHDOG */
#endif
#ifdef CONFIG_M5272
int do_reset(cmd_tbl_t * cmdtp, bd_t * bd, int flag, int argc, char *argv[])
{
volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
wdp->wdog_wrrr = 0;
udelay(1000);
/* enable watchdog, set timeout to 0 and wait */
wdp->wdog_wrrr = 1;
while (1) ;
/* we don't return! */
return 0;
};
int checkcpu(void)
{
volatile sysctrl_t *sysctrl = (sysctrl_t *) (MMAP_CFG);
uchar msk;
char *suf;
puts("CPU: ");
msk = (sysctrl->sc_dir > 28) & 0xf;
switch (msk) {
case 0x2:
suf = "1K75N";
break;
case 0x4:
suf = "3K75N";
break;
default:
suf = NULL;
printf("Freescale MCF5272 (Mask:%01x)\n", msk);
break;
}
if (suf)
printf("Freescale MCF5272 %s\n", suf);
return 0;
};
#if defined(CONFIG_WATCHDOG)
/* Called by macro WATCHDOG_RESET */
void watchdog_reset(void)
{
volatile wdog_t *wdt = (volatile wdog_t *)(MMAP_WDOG);
wdt->wdog_wcr = 0;
}
int watchdog_disable(void)
{
volatile wdog_t *wdt = (volatile wdog_t *)(MMAP_WDOG);
wdt->wdog_wcr = 0; /* reset watchdog counter */
wdt->wdog_wirr = 0; /* disable watchdog interrupt */
wdt->wdog_wrrr = 0; /* disable watchdog timer */
puts("WATCHDOG:disabled\n");
return (0);
}
int watchdog_init(void)
{
volatile wdog_t *wdt = (volatile wdog_t *)(MMAP_WDOG);
wdt->wdog_wirr = 0; /* disable watchdog interrupt */
/* set timeout and enable watchdog */
wdt->wdog_wrrr =
((CONFIG_WATCHDOG_TIMEOUT * CFG_HZ) / (32768 * 1000)) - 1;
wdt->wdog_wcr = 0; /* reset watchdog counter */
puts("WATCHDOG:enabled\n");
return (0);
}
#endif /* #ifdef CONFIG_WATCHDOG */
#endif /* #ifdef CONFIG_M5272 */
#ifdef CONFIG_M5282
int checkcpu(void)
{
unsigned char resetsource = MCFRESET_RSR;
printf("CPU: Freescale Coldfire MCF5282 (PIN: %2.2x REV: %2.2x)\n",
MCFCCM_CIR >> 8, MCFCCM_CIR & MCFCCM_CIR_PRN_MASK);
printf("Reset:%s%s%s%s%s%s%s\n",
(resetsource & MCFRESET_RSR_LOL) ? " Loss of Lock" : "",
(resetsource & MCFRESET_RSR_LOC) ? " Loss of Clock" : "",
(resetsource & MCFRESET_RSR_EXT) ? " External" : "",
(resetsource & MCFRESET_RSR_POR) ? " Power On" : "",
(resetsource & MCFRESET_RSR_WDR) ? " Watchdog" : "",
(resetsource & MCFRESET_RSR_SOFT) ? " Software" : "",
(resetsource & MCFRESET_RSR_LVD) ? " Low Voltage" : "");
return 0;
}
int do_reset(cmd_tbl_t * cmdtp, bd_t * bd, int flag, int argc, char *argv[])
{
MCFRESET_RCR = MCFRESET_RCR_SOFTRST;
return 0;
};
#endif
#ifdef CONFIG_M5249 /* test-only: todo... */
int checkcpu(void)
{
char buf[32];
printf("CPU: Freescale Coldfire MCF5249 at %s MHz\n",
strmhz(buf, CFG_CLK));
return 0;
}
int do_reset(cmd_tbl_t * cmdtp, bd_t * bd, int flag, int argc, char *argv[])
{
/* enable watchdog, set timeout to 0 and wait */
mbar_writeByte(MCFSIM_SYPCR, 0xc0);
while (1) ;
/* we don't return! */
return 0;
};
#endif
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