diff options
Diffstat (limited to 'arch/powerpc/cpu/mpc5xxx/cpu.c')
| -rw-r--r-- | arch/powerpc/cpu/mpc5xxx/cpu.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc5xxx/cpu.c b/arch/powerpc/cpu/mpc5xxx/cpu.c new file mode 100644 index 0000000..b20234d --- /dev/null +++ b/arch/powerpc/cpu/mpc5xxx/cpu.c @@ -0,0 +1,205 @@ +/* + * (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 */ |