u-boot/cpu/mpc5xxx/cpu.c
Heiko Schocher 3887c3fbdb mucmc52, uc101: delete ata@3a00 node, if no CF card is detected
U-Boot can detect if an IDE device is present or not.
If not, and this new config option is activated, U-Boot
removes the ATA node from the DTS before booting Linux,
so the Linux IDE driver does not probe the device and
crash. This is needed for buggy hardware (uc101) where
no pull down resistor is connected to the signal IDE5V_DD7.

Signed-off-by: Heiko Schocher <hs@denx.de>
2009-09-25 01:22:13 +02:00

193 lines
4.7 KiB
C

/*
* (C) Copyright 2000-2003
* 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];
#ifndef CONFIG_MGT5100
uint svr, pvr;
#endif
puts ("CPU: ");
#ifdef CONFIG_MGT5100
puts (CPU_ID_STR);
printf (" (JTAG ID %08lx)", *(vu_long *)MPC5XXX_CDM_JTAGID);
#else
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));
#endif
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
}
#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