arch/m68k/cpu/mcf532x/cpu.c

   1 /*
   2  *
   3  * (C) Copyright 2000-2003
   4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5  *
   6  * Copyright (C) 2004-2008 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
  35 DECLARE_GLOBAL_DATA_PTR;
  36
  37 int do_reset(cmd_tbl_t * cmdtp, bd_t * bd, int flag, int argc, char *argv[])
  38 {
  39         volatile rcm_t *rcm = (rcm_t *) (MMAP_RCM);
  40
  41         udelay(1000);
  42         rcm->rcr |= RCM_RCR_SOFTRST;
  43
  44         /* we don't return! */
  45         return 0;
  46 };
  47
  48 int checkcpu(void)
  49 {
  50         volatile ccm_t *ccm = (ccm_t *) MMAP_CCM;
  51         u16 msk;
  52         u16 id = 0;
  53         u8 ver;
  54
  55         puts("CPU:   ");
  56         msk = (ccm->cir >> 6);
  57         ver = (ccm->cir & 0x003f);
  58         switch (msk) {
  59 #ifdef CONFIG_MCF5301x
  60         case 0x78:
  61                 id = 53010;
  62                 break;
  63         case 0x77:
  64                 id = 53012;
  65                 break;
  66         case 0x76:
  67                 id = 53015;
  68                 break;
  69         case 0x74:
  70                 id = 53011;
  71                 break;
  72         case 0x73:
  73                 id = 53013;
  74                 break;
  75 #endif
  76 #ifdef CONFIG_MCF532x
  77         case 0x54:
  78                 id = 5329;
  79                 break;
  80         case 0x59:
  81                 id = 5328;
  82                 break;
  83         case 0x61:
  84                 id = 5327;
  85                 break;
  86         case 0x65:
  87                 id = 5373;
  88                 break;
  89         case 0x68:
  90                 id = 53721;
  91                 break;
  92         case 0x69:
  93                 id = 5372;
  94                 break;
  95         case 0x6B:
  96                 id = 5372;
  97                 break;
  98 #endif
  99         }
 100
 101         if (id) {
 102                 char buf1[32], buf2[32];
 103
 104                 printf("Freescale MCF%d (Mask:%01x Version:%x)\n", id, msk,
 105                        ver);
 106                 printf("       CPU CLK %s MHz BUS CLK %s MHz\n",
 107                        strmhz(buf1, gd->cpu_clk),
 108                        strmhz(buf2, gd->bus_clk));
 109         }
 110
 111         return 0;
 112 };
 113
 114 #if defined(CONFIG_WATCHDOG)
 115 /* Called by macro WATCHDOG_RESET */
 116 void watchdog_reset(void)
 117 {
 118         volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
 119
 120         wdp->sr = 0x5555;       /* Count register */
 121         wdp->sr = 0xAAAA;       /* Count register */
 122 }
 123
 124 int watchdog_disable(void)
 125 {
 126         volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
 127
 128         /* UserManual, once the wdog is disabled, wdog cannot be re-enabled */
 129         wdp->cr |= WTM_WCR_HALTED;      /* halted watchdog timer */
 130
 131         puts("WATCHDOG:disabled\n");
 132         return (0);
 133 }
 134
 135 int watchdog_init(void)
 136 {
 137         volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
 138         u32 wdog_module = 0;
 139
 140         /* set timeout and enable watchdog */
 141         wdog_module = ((CONFIG_SYS_CLK / 1000) * CONFIG_WATCHDOG_TIMEOUT);
 142 #ifdef CONFIG_M5329
 143         wdp->mr = (wdog_module / 8192);
 144 #else
 145         wdp->mr = (wdog_module / 4096);
 146 #endif
 147
 148         wdp->cr = WTM_WCR_EN;
 149         puts("WATCHDOG:enabled\n");
 150
 151         return (0);
 152 }
 153 #endif                          /* CONFIG_WATCHDOG */
 154
 155 #if defined(CONFIG_MCFFEC)
 156 /* Default initializations for MCFFEC controllers.  To override,
 157  * create a board-specific function called:
 158  *      int board_eth_init(bd_t *bis)
 159  */
 160
 161 int cpu_eth_init(bd_t *bis)
 162 {
 163         return mcffec_initialize(bis);
 164 }
 165 #endif