/* * Copyright (C) 2004-2006 Freescale Semiconductor, Inc. * (C) Copyright 2007 DENX Software Engineering * * 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 <mpc512x.h> #include <asm/processor.h> #if defined(CONFIG_OF_LIBFDT) #include <fdt_support.h> #endif DECLARE_GLOBAL_DATA_PTR; int checkcpu (void) { volatile immap_t *immr = (immap_t *) CFG_IMMR; ulong clock = gd->cpu_clk; u32 pvr = get_pvr (); u32 spridr = immr->sysconf.spridr; char buf[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 %3d MHz\n", strmhz(buf, clock), gd->csb_clk / 1000000); return 0; } int do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) { ulong msr; volatile immap_t *immap = (immap_t *) CFG_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 */ immap->reset.rpr = 0x52535445; /* Verify Reset Control Reg is enabled */ while (!((immap->reset.rcer) & RCER_CRE)) ; printf ("Resetting the board.\n"); udelay(200); /* Perform reset */ 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 *) CFG_IMMR; immr->wdt.swsrr = 0x556c; 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 */ /* * old device trees have ethernet nodes with * device_type = "network" */ do_fixup_by_prop(blob, "device_type", "network", 8, "local-mac-address", bd->bi_enetaddr, 6, 0); do_fixup_by_prop(blob, "device_type", "network", 8, "address", bd->bi_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) { int node; char *cpu_path = "/cpus/" OF_CPU; const char *path = NULL; /* * 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, bd); #endif } #endif