LXR uboot/arch/m68k/cpu/mcf523x/cpu.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 *
   4 * (C) Copyright 2000-2003
   5 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   6 *
   7 * Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
   8 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
   9 */
  10
  11#include <common.h>
  12#include <watchdog.h>
  13#include <command.h>
  14#include <netdev.h>
  15
  16#include <asm/immap.h>
  17#include <asm/io.h>
  18
  19DECLARE_GLOBAL_DATA_PTR;
  20
  21int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  22{
  23        ccm_t *ccm = (ccm_t *) MMAP_CCM;
  24
  25        out_8(&ccm->rcr, CCM_RCR_SOFTRST);
  26        /* we don't return! */
  27        return 0;
  28}
  29
  30#if defined(CONFIG_DISPLAY_CPUINFO)
  31int print_cpuinfo(void)
  32{
  33        ccm_t *ccm = (ccm_t *) MMAP_CCM;
  34        u16 msk;
  35        u16 id = 0;
  36        u8 ver;
  37
  38        puts("CPU:   ");
  39        msk = (in_be16(&ccm->cir) >> 6);
  40        ver = (in_be16(&ccm->cir) & 0x003f);
  41        switch (msk) {
  42        case 0x31:
  43                id = 5235;
  44                break;
  45        }
  46
  47        if (id) {
  48                char buf1[32], buf2[32];
  49
  50                printf("Freescale MCF%d (Mask:%01x Version:%x)\n", id, msk,
  51                       ver);
  52                printf("       CPU CLK %s MHz BUS CLK %s MHz\n",
  53                       strmhz(buf1, gd->cpu_clk),
  54                       strmhz(buf2, gd->bus_clk));
  55        }
  56
  57        return 0;
  58};
  59#endif /* CONFIG_DISPLAY_CPUINFO */
  60
  61#if defined(CONFIG_WATCHDOG)
  62/* Called by macro WATCHDOG_RESET */
  63void watchdog_reset(void)
  64{
  65        wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
  66
  67        /* Count register */
  68        out_be16(&wdp->sr, 0x5555);
  69        asm("nop");
  70        out_be16(&wdp->sr, 0xaaaa);
  71}
  72
  73int watchdog_disable(void)
  74{
  75        wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
  76
  77        /* UserManual, once the wdog is disabled, wdog cannot be re-enabled */
  78        /* halted watchdog timer */
  79        setbits_be16(&wdp->cr, WTM_WCR_HALTED);
  80
  81        puts("WATCHDOG:disabled\n");
  82        return (0);
  83}
  84
  85int watchdog_init(void)
  86{
  87        wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
  88        u32 wdog_module = 0;
  89
  90        /* set timeout and enable watchdog */
  91        wdog_module = ((CONFIG_SYS_CLK / CONFIG_SYS_HZ) * CONFIG_WATCHDOG_TIMEOUT);
  92        wdog_module |= (wdog_module / 8192);
  93        out_be16(&wdp->mr, wdog_module);
  94
  95        out_be16(&wdp->cr, WTM_WCR_EN);
  96        puts("WATCHDOG:enabled\n");
  97
  98        return (0);
  99}
 100#endif                          /* CONFIG_WATCHDOG */
 101
 102#if defined(CONFIG_MCFFEC)
 103/* Default initializations for MCFFEC controllers.  To override,
 104 * create a board-specific function called:
 105 *      int board_eth_init(bd_t *bis)
 106 */
 107
 108int cpu_eth_init(bd_t *bis)
 109{
 110        return mcffec_initialize(bis);
 111}
 112#endif
 113