arch/m68k/cpu/mcf5227x/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
  32 #include <asm/immap.h>
  33
  34 DECLARE_GLOBAL_DATA_PTR;
  35
  36 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  37 {
  38         volatile rcm_t *rcm = (rcm_t *) (MMAP_RCM);
  39         udelay(1000);
  40         rcm->rcr |= RCM_RCR_SOFTRST;
  41
  42         /* we don't return! */
  43         return 0;
  44 };
  45
  46 int 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 0x6c:
  58                 id = 52277;
  59                 break;
  60         }
  61
  62         if (id) {
  63                 char buf1[32], buf2[32], buf3[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 FLB CLK %s MHz\n",
  68                        strmhz(buf1, gd->cpu_clk),
  69                        strmhz(buf2, gd->bus_clk),
  70                        strmhz(buf3, gd->flb_clk));
  71                 printf("       INP CLK %s MHz VCO CLK %s MHz\n",
  72                        strmhz(buf1, gd->inp_clk),
  73                        strmhz(buf2, gd->vco_clk));
  74         }
  75
  76         return 0;
  77 }