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/*
* (C) Copyright 2007-2010 DENX Software Engineering
* Copyright (C) 2004-2006 Freescale Semiconductor, Inc.
*
* 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 MPC512x family.
*
* Derived from the MPC83xx code.
*/
#include <common.h>
#include <command.h>
#include <net.h>
#include <netdev.h>
#include <asm/processor.h>
#include <asm/io.h>
#if defined(CONFIG_OF_LIBFDT)
#include <fdt_support.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
int checkcpu (void)
{
volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
ulong clock = gd->cpu_clk;
u32 pvr = get_pvr ();
u32 spridr = in_be32(&immr->sysconf.spridr);
char buf1[32], buf2[32];
puts ("CPU: ");
switch (spridr & 0xffff0000) {
case SPR_5121E:
puts ("MPC5121e ");
break;
default:
printf ("Unknown part ID %08x ", spridr & 0xffff0000);
}
printf ("rev. %d.%d, Core ", SVR_MJREV (spridr), SVR_MNREV (spridr));
switch (pvr & 0xffff0000) {
case PVR_E300C4:
puts ("e300c4 ");
break;
default:
puts ("unknown ");
}
printf ("at %s MHz, CSB at %s MHz (RSR=0x%04lx)\n",
strmhz(buf1, clock),
strmhz(buf2, gd->arch.csb_clk),
gd->arch.reset_status & 0xffff);
return 0;
}
int
do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
ulong msr;
volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
/* Interrupts and MMU off */
__asm__ __volatile__ ("mfmsr %0":"=r" (msr):);
msr &= ~( MSR_EE | MSR_IR | MSR_DR);
__asm__ __volatile__ ("mtmsr %0"::"r" (msr));
/*
* Enable Reset Control Reg - "RSTE" is the magic word that let us go
*/
out_be32(&immap->reset.rpr, 0x52535445);
/* Verify Reset Control Reg is enabled */
while (!(in_be32(&immap->reset.rcer) & RCER_CRE))
;
printf ("Resetting the board.\n");
udelay(200);
/* Perform reset */
out_be32(&immap->reset.rcr, RCR_SWHR);
/* Unreached... */
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_WATCHDOG)
void watchdog_reset (void)
{
int re_enable = disable_interrupts ();
/* Reset watchdog */
volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
out_be32(&immr->wdt.swsrr, 0x556c);
out_be32(&immr->wdt.swsrr, 0xaa39);
if (re_enable)
enable_interrupts ();
}
#endif
#ifdef CONFIG_OF_LIBFDT
#ifdef CONFIG_OF_SUPPORT_OLD_DEVICE_TREES
/*
* fdt setup for old device trees
* fix up
* cpu clocks
* soc clocks
* ethernet addresses
*/
static void old_ft_cpu_setup(void *blob, bd_t *bd)
{
/*
* avoid fixing up by path because that
* produces scary error messages
*/
uchar enetaddr[6];
/*
* old device trees have ethernet nodes with
* device_type = "network"
*/
eth_getenv_enetaddr("ethaddr", enetaddr);
do_fixup_by_prop(blob, "device_type", "network", 8,
"local-mac-address", enetaddr, 6, 0);
do_fixup_by_prop(blob, "device_type", "network", 8,
"address", enetaddr, 6, 0);
/*
* old device trees have soc nodes with
* device_type = "soc"
*/
do_fixup_by_prop_u32(blob, "device_type", "soc", 4,
"bus-frequency", bd->bi_ipsfreq, 0);
}
#endif
static void ft_clock_setup(void *blob, bd_t *bd)
{
char *cpu_path = "/cpus/" OF_CPU;
/*
* fixup cpu clocks using path
*/
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);
/*
* fixup soc clocks using compatible
*/
do_fixup_by_compat_u32(blob, OF_SOC_COMPAT,
"bus-frequency", bd->bi_ipsfreq, 1);
}
void ft_cpu_setup(void *blob, bd_t *bd)
{
#ifdef CONFIG_OF_SUPPORT_OLD_DEVICE_TREES
old_ft_cpu_setup(blob, bd);
#endif
ft_clock_setup(blob, bd);
#ifdef CONFIG_HAS_ETH0
fdt_fixup_ethernet(blob);
#endif
fdt_fixup_memory(blob, (u64)bd->bi_memstart, (u64)bd->bi_memsize);
}
#endif
#ifdef CONFIG_MPC512x_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 mpc512x_fec_initialize(bis);
}
#endif
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