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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
/*
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* Cobalt Reset operations
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1995, 1996, 1997 by Ralf Baechle
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* Copyright (C) 2001 by Liam Davies (ldavies@agile.tv)
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*/
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <asm/cacheflush.h>
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#include <asm/io.h>
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#include <asm/processor.h>
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#include <asm/reboot.h>
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#include <asm/system.h>
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#include <asm/mipsregs.h>
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#include <asm/mach-cobalt/cobalt.h>
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void cobalt_machine_halt(void)
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{
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int state, last, diff;
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unsigned long mark;
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/*
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* turn off bar on Qube, flash power off LED on RaQ (0.5Hz)
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*
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* restart if ENTER and SELECT are pressed
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*/
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last = COBALT_KEY_PORT;
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for (state = 0;;) {
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state ^= COBALT_LED_POWER_OFF;
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COBALT_LED_PORT = state;
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diff = COBALT_KEY_PORT ^ last;
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last ^= diff;
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if((diff & (COBALT_KEY_ENTER | COBALT_KEY_SELECT)) && !(~last & (COBALT_KEY_ENTER | COBALT_KEY_SELECT)))
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COBALT_LED_PORT = COBALT_LED_RESET;
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for (mark = jiffies; jiffies - mark < HZ;)
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;
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}
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}
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void cobalt_machine_restart(char *command)
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{
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COBALT_LED_PORT = COBALT_LED_RESET;
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/* we should never get here */
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cobalt_machine_halt();
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}
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/*
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* This triggers the luser mode device driver for the power switch ;-)
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*/
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void cobalt_machine_power_off(void)
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{
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printk("You can switch the machine off now.\n");
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cobalt_machine_halt();
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}
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