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81 lines
2.0 KiB
81 lines
2.0 KiB
/*
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* pmu.c, Power Management Unit routines for NEC VR4100 series.
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*
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* Copyright (C) 2003-2004 Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/smp.h>
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#include <linux/types.h>
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#include <asm/cpu.h>
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#include <asm/io.h>
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#include <asm/reboot.h>
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#include <asm/system.h>
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#define PMUCNT2REG KSEG1ADDR(0x0f0000c6)
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#define SOFTRST 0x0010
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static inline void software_reset(void)
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{
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uint16_t val;
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switch (current_cpu_data.cputype) {
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case CPU_VR4122:
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case CPU_VR4131:
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case CPU_VR4133:
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val = readw(PMUCNT2REG);
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val |= SOFTRST;
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writew(val, PMUCNT2REG);
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break;
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default:
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break;
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}
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}
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static void vr41xx_restart(char *command)
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{
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local_irq_disable();
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software_reset();
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printk(KERN_NOTICE "\nYou can reset your system\n");
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while (1) ;
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}
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static void vr41xx_halt(void)
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{
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local_irq_disable();
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printk(KERN_NOTICE "\nYou can turn off the power supply\n");
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while (1) ;
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}
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static void vr41xx_power_off(void)
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{
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local_irq_disable();
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printk(KERN_NOTICE "\nYou can turn off the power supply\n");
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while (1) ;
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}
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static int __init vr41xx_pmu_init(void)
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{
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_machine_restart = vr41xx_restart;
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_machine_halt = vr41xx_halt;
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_machine_power_off = vr41xx_power_off;
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return 0;
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}
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early_initcall(vr41xx_pmu_init);
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