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/*
* (C) Copyright 2000-2010
* Wolfgang Denk, DENX Software Engineering, wd@denx.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
*/
/*
* CPU specific code for the MPC5xxx CPUs
*/
#include <common.h>
#include <watchdog.h>
#include <command.h>
#include <net.h>
#include <mpc5xxx.h>
#include <netdev.h>
#include <asm/io.h>
#include <asm/processor.h>
#if defined(CONFIG_OF_LIBFDT)
#include <libfdt.h>
#include <libfdt_env.h>
#include <fdt_support.h>
#endif
#if defined(CONFIG_OF_IDE_FIXUP)
#include <ide.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
int checkcpu (void)
{
ulong clock = gd->cpu_clk;
char buf[32];
uint svr, pvr;
puts ("CPU: ");
svr = get_svr();
pvr = get_pvr();
switch (pvr) {
case PVR_5200:
printf("MPC5200");
break;
case PVR_5200B:
printf("MPC5200B");
break;
default:
printf("Unknown MPC5xxx");
break;
}
printf (" v%d.%d, Core v%d.%d", SVR_MJREV (svr), SVR_MNREV (svr),
PVR_MAJ(pvr), PVR_MIN(pvr));
printf (" at %s MHz\n", strmhz (buf, clock));
return 0;
}
/* ------------------------------------------------------------------------- */
int
do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
ulong msr;
/* Interrupts and MMU off */
__asm__ __volatile__ ("mfmsr %0":"=r" (msr):);
msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR);
__asm__ __volatile__ ("mtmsr %0"::"r" (msr));
/* Charge the watchdog timer */
*(vu_long *)(MPC5XXX_GPT0_COUNTER) = 0x0001000f;
*(vu_long *)(MPC5XXX_GPT0_ENABLE) = 0x9004; /* wden|ce|timer_ms */
while(1);
return 1;
}
/* ------------------------------------------------------------------------- */
/*
* Get timebase clock frequency (like cpu_clk in Hz)
*
*/
unsigned long get_tbclk (void)
{
ulong tbclk;
tbclk = (gd->bus_clk + 3L) / 4L;
return (tbclk);
}
/* ------------------------------------------------------------------------- */
#if defined(CONFIG_OF_LIBFDT) && defined (CONFIG_OF_BOARD_SETUP)
void ft_cpu_setup(void *blob, bd_t *bd)
{
int div = in_8((void*)CONFIG_SYS_MBAR + 0x204) & 0x0020 ? 8 : 4;
char * cpu_path = "/cpus/" OF_CPU;
#ifdef CONFIG_MPC5xxx_FEC
uchar enetaddr[6];
char * eth_path = "/" OF_SOC "/ethernet@3000";
#endif
do_fixup_by_path_u32(blob, cpu_path, "timebase-frequency", OF_TBCLK, 1);
do_fixup_by_path_u32(blob, cpu_path, "bus-frequency", bd->bi_busfreq, 1);
do_fixup_by_path_u32(blob, cpu_path, "clock-frequency", bd->bi_intfreq, 1);
do_fixup_by_path_u32(blob, "/" OF_SOC, "bus-frequency", bd->bi_ipbfreq, 1);
do_fixup_by_path_u32(blob, "/" OF_SOC, "system-frequency",
bd->bi_busfreq*div, 1);
#ifdef CONFIG_MPC5xxx_FEC
eth_getenv_enetaddr("ethaddr", enetaddr);
do_fixup_by_path(blob, eth_path, "mac-address", enetaddr, 6, 0);
do_fixup_by_path(blob, eth_path, "local-mac-address", enetaddr, 6, 0);
#endif
#if defined(CONFIG_OF_IDE_FIXUP)
if (!ide_device_present(0)) {
/* NO CF card detected -> delete ata node in DTS */
int nodeoffset = 0;
char nodename[] = "/soc5200@f0000000/ata@3a00";
nodeoffset = fdt_path_offset(blob, nodename);
if (nodeoffset >= 0) {
fdt_del_node(blob, nodeoffset);
} else {
printf("%s: cannot find %s node err:%s\n",
__func__, nodename, fdt_strerror(nodeoffset));
}
}
#endif
fdt_fixup_memory(blob, (u64)bd->bi_memstart, (u64)bd->bi_memsize);
}
#endif
#ifdef CONFIG_BOOTCOUNT_LIMIT
void bootcount_store (ulong a)
{
volatile ulong *save_addr = (volatile ulong *) (MPC5XXX_CDM_BRDCRMB);
*save_addr = (BOOTCOUNT_MAGIC & 0xffff0000) | a;
}
ulong bootcount_load (void)
{
volatile ulong *save_addr = (volatile ulong *) (MPC5XXX_CDM_BRDCRMB);
if ((*save_addr & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
return 0;
else
return (*save_addr & 0x0000ffff);
}
#endif /* CONFIG_BOOTCOUNT_LIMIT */
#ifdef CONFIG_MPC5xxx_FEC
/* Default initializations for FEC controllers. To override,
* create a board-specific function called:
* int board_eth_init(bd_t *bis)
*/
int cpu_eth_init(bd_t *bis)
{
return mpc5xxx_fec_initialize(bis);
}
#endif
#if defined(CONFIG_WATCHDOG)
void watchdog_reset(void)
{
int re_enable = disable_interrupts();
reset_5xxx_watchdog();
if (re_enable) enable_interrupts();
}
void reset_5xxx_watchdog(void)
{
volatile struct mpc5xxx_gpt *gpt0 =
(struct mpc5xxx_gpt *) MPC5XXX_GPT;
/* Trigger TIMER_0 by writing A5 to OCPW */
clrsetbits_be32(&gpt0->emsr, 0xff000000, 0xa5000000);
}
#endif /* CONFIG_WATCHDOG */
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