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, 2012 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 #include <asm/io.h>
  35
  36 DECLARE_GLOBAL_DATA_PTR;
  37
  38 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  39 {
  40         rcm_t *rcm = (rcm_t *) (MMAP_RCM);
  41
  42         udelay(1000);
  43         setbits_8(&rcm->rcr, RCM_RCR_SOFTRST);
  44
  45         /* we don't return! */
  46         return 0;
  47 };
  48
  49 int checkcpu(void)
  50 {
  51         ccm_t *ccm = (ccm_t *) MMAP_CCM;
  52         u16 msk;
  53         u16 id = 0;
  54         u8 ver;
  55
  56         puts("CPU:   ");
  57         msk = (in_be16(&ccm->cir) >> 6);
  58         ver = (in_be16(&ccm->cir) & 0x003f);
  59         switch (msk) {
  60 #ifdef CONFIG_MCF5301x
  61         case 0x78:
  62                 id = 53010;
  63                 break;
  64         case 0x77:
  65                 id = 53012;
  66                 break;
  67         case 0x76:
  68                 id = 53015;
  69                 break;
  70         case 0x74:
  71                 id = 53011;
  72                 break;
  73         case 0x73:
  74                 id = 53013;
  75                 break;
  76 #endif
  77 #ifdef CONFIG_MCF532x
  78         case 0x54:
  79                 id = 5329;
  80                 break;
  81         case 0x59:
  82                 id = 5328;
  83                 break;
  84         case 0x61:
  85                 id = 5327;
  86                 break;
  87         case 0x65:
  88                 id = 5373;
  89                 break;
  90         case 0x68:
  91                 id = 53721;
  92                 break;
  93         case 0x69:
  94                 id = 5372;
  95                 break;
  96         case 0x6B:
  97                 id = 5372;
  98                 break;
  99 #endif
 100         }
 101
 102         if (id) {
 103                 char buf1[32], buf2[32];
 104
 105                 printf("Freescale MCF%d (Mask:%01x Version:%x)\n", id, msk,
 106                        ver);
 107                 printf("       CPU CLK %s MHz BUS CLK %s MHz\n",
 108                        strmhz(buf1, gd->cpu_clk),
 109                        strmhz(buf2, gd->bus_clk));
 110         }
 111
 112         return 0;
 113 };
 114
 115 #if defined(CONFIG_WATCHDOG)
 116 /* Called by macro WATCHDOG_RESET */
 117 void watchdog_reset(void)
 118 {
 119         wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
 120
 121         /* Count register */
 122         out_be16(&wdp->sr, 0x5555);
 123         out_be16(&wdp->sr, 0xaaaa);
 124 }
 125
 126 int watchdog_disable(void)
 127 {
 128         wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
 129
 130         /* UserManual, once the wdog is disabled, wdog cannot be re-enabled */
 131         /* halted watchdog timer */
 132         setbits_be16(&wdp->cr, WTM_WCR_HALTED);
 133
 134         puts("WATCHDOG:disabled\n");
 135         return (0);
 136 }
 137
 138 int watchdog_init(void)
 139 {
 140         wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
 141         u32 wdog_module = 0;
 142
 143         /* set timeout and enable watchdog */
 144         wdog_module = ((CONFIG_SYS_CLK / 1000) * CONFIG_WATCHDOG_TIMEOUT);
 145 #ifdef CONFIG_M5329
 146         out_be16(&wdp->mr, wdog_module / 8192);
 147 #else
 148         out_be16(&wdp->mr, wdog_module / 4096);
 149 #endif
 150
 151         out_be16(&wdp->cr, WTM_WCR_EN);
 152         puts("WATCHDOG:enabled\n");
 153
 154         return (0);
 155 }
 156 #endif                          /* CONFIG_WATCHDOG */
 157
 158 #if defined(CONFIG_MCFFEC)
 159 /* Default initializations for MCFFEC controllers.  To override,
 160  * create a board-specific function called:
 161  *      int board_eth_init(bd_t *bis)
 162  */
 163
 164 int cpu_eth_init(bd_t *bis)
 165 {
 166         return mcffec_initialize(bis);
 167 }
 168 #endif