LXR uboot/arch/powerpc/cpu/mpc5xxx/cpu.c

   1/*
   2 * (C) Copyright 2000-2010
   3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 *
   5 * See file CREDITS for list of people who contributed to this
   6 * project.
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License as
  10 * published by the Free Software Foundation; either version 2 of
  11 * the License, or (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21 * MA 02111-1307 USA
  22 */
  23
  24/*
  25 * CPU specific code for the MPC5xxx CPUs
  26 */
  27
  28#include <common.h>
  29#include <watchdog.h>
  30#include <command.h>
  31#include <net.h>
  32#include <mpc5xxx.h>
  33#include <netdev.h>
  34#include <asm/io.h>
  35#include <asm/processor.h>
  36
  37#if defined(CONFIG_OF_LIBFDT)
  38#include <libfdt.h>
  39#include <libfdt_env.h>
  40#include <fdt_support.h>
  41#endif
  42
  43#if defined(CONFIG_OF_IDE_FIXUP)
  44#include <ide.h>
  45#endif
  46
  47DECLARE_GLOBAL_DATA_PTR;
  48
  49int checkcpu (void)
  50{
  51        ulong clock = gd->cpu_clk;
  52        char buf[32];
  53        uint svr, pvr;
  54
  55        puts ("CPU:   ");
  56
  57        svr = get_svr();
  58        pvr = get_pvr();
  59
  60        switch (pvr) {
  61        case PVR_5200:
  62                printf("MPC5200");
  63                break;
  64        case PVR_5200B:
  65                printf("MPC5200B");
  66                break;
  67        default:
  68                printf("Unknown MPC5xxx");
  69                break;
  70        }
  71
  72        printf (" v%d.%d, Core v%d.%d", SVR_MJREV (svr), SVR_MNREV (svr),
  73                PVR_MAJ(pvr), PVR_MIN(pvr));
  74        printf (" at %s MHz\n", strmhz (buf, clock));
  75        return 0;
  76}
  77
  78/* ------------------------------------------------------------------------- */
  79
  80int
  81do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
  82{
  83        ulong msr;
  84        /* Interrupts and MMU off */
  85        __asm__ __volatile__ ("mfmsr    %0":"=r" (msr):);
  86
  87        msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR);
  88        __asm__ __volatile__ ("mtmsr    %0"::"r" (msr));
  89
  90        /* Charge the watchdog timer */
  91        *(vu_long *)(MPC5XXX_GPT0_COUNTER) = 0x0001000f;
  92        *(vu_long *)(MPC5XXX_GPT0_ENABLE) = 0x9004; /* wden|ce|timer_ms */
  93        while(1);
  94
  95        return 1;
  96
  97}
  98
  99/* ------------------------------------------------------------------------- */
 100
 101/*
 102 * Get timebase clock frequency (like cpu_clk in Hz)
 103 *
 104 */
 105unsigned long get_tbclk (void)
 106{
 107        ulong tbclk;
 108
 109        tbclk = (gd->bus_clk + 3L) / 4L;
 110
 111        return (tbclk);
 112}
 113
 114/* ------------------------------------------------------------------------- */
 115
 116#if defined(CONFIG_OF_LIBFDT) && defined (CONFIG_OF_BOARD_SETUP)
 117void ft_cpu_setup(void *blob, bd_t *bd)
 118{
 119        int div = in_8((void*)CONFIG_SYS_MBAR + 0x204) & 0x0020 ? 8 : 4;
 120        char * cpu_path = "/cpus/" OF_CPU;
 121#ifdef CONFIG_MPC5xxx_FEC
 122        uchar enetaddr[6];
 123        char * eth_path = "/" OF_SOC "/ethernet@3000";
 124#endif
 125
 126        do_fixup_by_path_u32(blob, cpu_path, "timebase-frequency", OF_TBCLK, 1);
 127        do_fixup_by_path_u32(blob, cpu_path, "bus-frequency", bd->bi_busfreq, 1);
 128        do_fixup_by_path_u32(blob, cpu_path, "clock-frequency", bd->bi_intfreq, 1);
 129        do_fixup_by_path_u32(blob, "/" OF_SOC, "bus-frequency", bd->bi_ipbfreq, 1);
 130        do_fixup_by_path_u32(blob, "/" OF_SOC, "system-frequency",
 131                                bd->bi_busfreq*div, 1);
 132#ifdef CONFIG_MPC5xxx_FEC
 133        eth_getenv_enetaddr("ethaddr", enetaddr);
 134        do_fixup_by_path(blob, eth_path, "mac-address", enetaddr, 6, 0);
 135        do_fixup_by_path(blob, eth_path, "local-mac-address", enetaddr, 6, 0);
 136#endif
 137#if defined(CONFIG_OF_IDE_FIXUP)
 138        if (!ide_device_present(0)) {
 139                /* NO CF card detected -> delete ata node in DTS */
 140                int nodeoffset = 0;
 141                char nodename[] = "/soc5200@f0000000/ata@3a00";
 142
 143                nodeoffset = fdt_path_offset(blob, nodename);
 144                if (nodeoffset >= 0) {
 145                        fdt_del_node(blob, nodeoffset);
 146                } else {
 147                        printf("%s: cannot find %s node err:%s\n",
 148                                __func__, nodename, fdt_strerror(nodeoffset));
 149                }
 150        }
 151
 152#endif
 153        fdt_fixup_memory(blob, (u64)bd->bi_memstart, (u64)bd->bi_memsize);
 154}
 155#endif
 156
 157#ifdef CONFIG_MPC5xxx_FEC
 158/* Default initializations for FEC controllers.  To override,
 159 * create a board-specific function called:
 160 *      int board_eth_init(bd_t *bis)
 161 */
 162
 163int cpu_eth_init(bd_t *bis)
 164{
 165        return mpc5xxx_fec_initialize(bis);
 166}
 167#endif
 168
 169#if defined(CONFIG_WATCHDOG)
 170void watchdog_reset(void)
 171{
 172        int re_enable = disable_interrupts();
 173        reset_5xxx_watchdog();
 174        if (re_enable) enable_interrupts();
 175}
 176
 177void reset_5xxx_watchdog(void)
 178{
 179        volatile struct mpc5xxx_gpt *gpt0 =
 180                (struct mpc5xxx_gpt *) MPC5XXX_GPT;
 181
 182        /* Trigger TIMER_0 by writing A5 to OCPW */
 183        clrsetbits_be32(&gpt0->emsr, 0xff000000, 0xa5000000);
 184}
 185#endif  /* CONFIG_WATCHDOG */
 186