LXR uboot/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
  36DECLARE_GLOBAL_DATA_PTR;
  37
  38int 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
  49int 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 */
 117void 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
 126int 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
 138int 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
 164int cpu_eth_init(bd_t *bis)
 165{
 166        return mcffec_initialize(bis);
 167}
 168#endif
 169