LXR uboot/arch/m68k/cpu/mcf523x/cpu.c

   1/*
   2 *
   3 * (C) Copyright 2000-2003
   4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5 *
   6 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
   7 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
   8 *
   9 * See file CREDITS for list of people who contributed to this
  10 * project.
  11 *
  12 * This program is free software; you can redistribute it and/or
  13 * modify it under the terms of the GNU General Public License as
  14 * published by the Free Software Foundation; either version 2 of
  15 * the License, or (at your option) any later version.
  16 *
  17 * This program is distributed in the hope that it will be useful,
  18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 * GNU General Public License for more details.
  21 *
  22 * You should have received a copy of the GNU General Public License
  23 * along with this program; if not, write to the Free Software
  24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25 * MA 02111-1307 USA
  26 */
  27
  28#include <common.h>
  29#include <watchdog.h>
  30#include <command.h>
  31#include <netdev.h>
  32
  33#include <asm/immap.h>
  34
  35DECLARE_GLOBAL_DATA_PTR;
  36
  37int do_reset(cmd_tbl_t * cmdtp, bd_t * bd, int flag, int argc, char * const argv[])
  38{
  39        volatile ccm_t *ccm = (ccm_t *) MMAP_CCM;
  40
  41        ccm->rcr = CCM_RCR_SOFTRST;
  42        /* we don't return! */
  43        return 0;
  44};
  45
  46int checkcpu(void)
  47{
  48        volatile ccm_t *ccm = (ccm_t *) MMAP_CCM;
  49        u16 msk;
  50        u16 id = 0;
  51        u8 ver;
  52
  53        puts("CPU:   ");
  54        msk = (ccm->cir >> 6);
  55        ver = (ccm->cir & 0x003f);
  56        switch (msk) {
  57        case 0x31:
  58                id = 5235;
  59                break;
  60        }
  61
  62        if (id) {
  63                char buf1[32], buf2[32];
  64
  65                printf("Freescale MCF%d (Mask:%01x Version:%x)\n", id, msk,
  66                       ver);
  67                printf("       CPU CLK %s MHz BUS CLK %s MHz\n",
  68                       strmhz(buf1, gd->cpu_clk),
  69                       strmhz(buf2, gd->bus_clk));
  70        }
  71
  72        return 0;
  73};
  74
  75#if defined(CONFIG_WATCHDOG)
  76/* Called by macro WATCHDOG_RESET */
  77void watchdog_reset(void)
  78{
  79        volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
  80
  81        wdp->sr = 0x5555;       /* Count register */
  82        asm("nop");
  83        wdp->sr = 0xAAAA;       /* Count register */
  84}
  85
  86int watchdog_disable(void)
  87{
  88        volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
  89
  90        /* UserManual, once the wdog is disabled, wdog cannot be re-enabled */
  91        wdp->cr |= WTM_WCR_HALTED;      /* halted watchdog timer */
  92
  93        puts("WATCHDOG:disabled\n");
  94        return (0);
  95}
  96
  97int watchdog_init(void)
  98{
  99        volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
 100        u32 wdog_module = 0;
 101
 102        /* set timeout and enable watchdog */
 103        wdog_module = ((CONFIG_SYS_CLK / CONFIG_SYS_HZ) * CONFIG_WATCHDOG_TIMEOUT);
 104        wdog_module |= (wdog_module / 8192);
 105        wdp->mr = wdog_module;
 106
 107        wdp->cr = WTM_WCR_EN;
 108        puts("WATCHDOG:enabled\n");
 109
 110        return (0);
 111}
 112#endif                          /* CONFIG_WATCHDOG */
 113
 114#if defined(CONFIG_MCFFEC)
 115/* Default initializations for MCFFEC controllers.  To override,
 116 * create a board-specific function called:
 117 *      int board_eth_init(bd_t *bis)
 118 */
 119
 120int cpu_eth_init(bd_t *bis)
 121{
 122        return mcffec_initialize(bis);
 123}
 124#endif
 125