cpu/mcf532x/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, bd_t * bd, int flag, int argc, char *argv[])
  37 {
  38         volatile rcm_t *rcm = (rcm_t *) (MMAP_RCM);
  39
  40         udelay(1000);
  41         rcm->rcr |= RCM_RCR_SOFTRST;
  42
  43         /* we don't return! */
  44         return 0;
  45 };
  46
  47 int checkcpu(void)
  48 {
  49         volatile ccm_t *ccm = (ccm_t *) MMAP_CCM;
  50         u16 msk;
  51         u16 id = 0;
  52         u8 ver;
  53
  54         puts("CPU:   ");
  55         msk = (ccm->cir >> 6);
  56         ver = (ccm->cir & 0x003f);
  57         switch (msk) {
  58         case 0x54:
  59                 id = 5329;
  60                 break;
  61         case 0x59:
  62                 id = 5328;
  63                 break;
  64         case 0x61:
  65                 id = 5327;
  66                 break;
  67         case 0x65:
  68                 id = 5373;
  69                 break;
  70         case 0x68:
  71                 id = 53721;
  72                 break;
  73         case 0x69:
  74                 id = 5372;
  75                 break;
  76         case 0x6B:
  77                 id = 5372;
  78                 break;
  79         }
  80
  81         if (id) {
  82                 printf("Freescale MCF%d (Mask:%01x Version:%x)\n", id, msk,
  83                        ver);
  84                 printf("       CPU CLK %d Mhz BUS CLK %d Mhz\n",
  85                        (int)(gd->cpu_clk / 1000000),
  86                        (int)(gd->bus_clk / 1000000));
  87         }
  88
  89         return 0;
  90 };
  91
  92 #if defined(CONFIG_WATCHDOG)
  93 /* Called by macro WATCHDOG_RESET */
  94 void watchdog_reset(void)
  95 {
  96         volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
  97
  98         wdp->sr = 0x5555;       /* Count register */
  99         wdp->sr = 0xAAAA;       /* Count register */
 100 }
 101
 102 int watchdog_disable(void)
 103 {
 104         volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
 105
 106         /* UserManual, once the wdog is disabled, wdog cannot be re-enabled */
 107         wdp->cr |= WTM_WCR_HALTED;      /* halted watchdog timer */
 108
 109         puts("WATCHDOG:disabled\n");
 110         return (0);
 111 }
 112
 113 int watchdog_init(void)
 114 {
 115         volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
 116         u32 wdog_module = 0;
 117
 118         /* set timeout and enable watchdog */
 119         wdog_module = ((CFG_CLK / 1000) * CONFIG_WATCHDOG_TIMEOUT);
 120 #ifdef CONFIG_M5329
 121         wdp->mr = (wdog_module / 8192);
 122 #else
 123         wdp->mr = (wdog_module / 4096);
 124 #endif
 125
 126         wdp->cr = WTM_WCR_EN;
 127         puts("WATCHDOG:enabled\n");
 128
 129         return (0);
 130 }
 131 #endif                          /* CONFIG_WATCHDOG */