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 #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         case 0x54:
  60                 id = 5329;
  61                 break;
  62         case 0x59:
  63                 id = 5328;
  64                 break;
  65         case 0x61:
  66                 id = 5327;
  67                 break;
  68         case 0x65:
  69                 id = 5373;
  70                 break;
  71         case 0x68:
  72                 id = 53721;
  73                 break;
  74         case 0x69:
  75                 id = 5372;
  76                 break;
  77         case 0x6B:
  78                 id = 5372;
  79                 break;
  80         }
  81
  82         if (id) {
  83                 printf("Freescale MCF%d (Mask:%01x Version:%x)\n", id, msk,
  84                        ver);
  85                 printf("       CPU CLK %d Mhz BUS CLK %d Mhz\n",
  86                        (int)(gd->cpu_clk / 1000000),
  87                        (int)(gd->bus_clk / 1000000));
  88         }
  89
  90         return 0;
  91 };
  92
  93 #if defined(CONFIG_WATCHDOG)
  94 /* Called by macro WATCHDOG_RESET */
  95 void watchdog_reset(void)
  96 {
  97         volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
  98
  99         wdp->sr = 0x5555;       /* Count register */
 100         wdp->sr = 0xAAAA;       /* Count register */
 101 }
 102
 103 int watchdog_disable(void)
 104 {
 105         volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
 106
 107         /* UserManual, once the wdog is disabled, wdog cannot be re-enabled */
 108         wdp->cr |= WTM_WCR_HALTED;      /* halted watchdog timer */
 109
 110         puts("WATCHDOG:disabled\n");
 111         return (0);
 112 }
 113
 114 int watchdog_init(void)
 115 {
 116         volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
 117         u32 wdog_module = 0;
 118
 119         /* set timeout and enable watchdog */
 120         wdog_module = ((CONFIG_SYS_CLK / 1000) * CONFIG_WATCHDOG_TIMEOUT);
 121 #ifdef CONFIG_M5329
 122         wdp->mr = (wdog_module / 8192);
 123 #else
 124         wdp->mr = (wdog_module / 4096);
 125 #endif
 126
 127         wdp->cr = WTM_WCR_EN;
 128         puts("WATCHDOG:enabled\n");
 129
 130         return (0);
 131 }
 132 #endif                          /* CONFIG_WATCHDOG */
 133
 134 #if defined(CONFIG_MCFFEC)
 135 /* Default initializations for MCFFEC controllers.  To override,
 136  * create a board-specific function called:
 137  *      int board_eth_init(bd_t *bis)
 138  */
 139
 140 int cpu_eth_init(bd_t *bis)
 141 {
 142         return mcffec_initialize(bis);
 143 }
 144 #endif