1 /* 2 * Cobalt Reset operations 3 * 4 * This file is subject to the terms and conditions of the GNU General Public 5 * License. See the file "COPYING" in the main directory of this archive 6 * for more details. 7 * 8 * Copyright (C) 1995, 1996, 1997 by Ralf Baechle 9 * Copyright (C) 2001 by Liam Davies (ldavies@agile.tv) 10 */ 11 #include <linux/sched.h> 12 #include <linux/mm.h> 13 #include <asm/cacheflush.h> 14 #include <asm/io.h> 15 #include <asm/processor.h> 16 #include <asm/reboot.h> 17 #include <asm/system.h> 18 #include <asm/mipsregs.h> 19 #include <asm/mach-cobalt/cobalt.h> 20 21 void cobalt_machine_halt(void) 22 { 23 int state, last, diff; 24 unsigned long mark; 25 26 /* 27 * turn off bar on Qube, flash power off LED on RaQ (0.5Hz) 28 * 29 * restart if ENTER and SELECT are pressed 30 */ 31 32 last = COBALT_KEY_PORT; 33 34 for (state = 0;;) { 35 36 state ^= COBALT_LED_POWER_OFF; 37 COBALT_LED_PORT = state; 38 39 diff = COBALT_KEY_PORT ^ last; 40 last ^= diff; 41 42 if((diff & (COBALT_KEY_ENTER | COBALT_KEY_SELECT)) && !(~last & (COBALT_KEY_ENTER | COBALT_KEY_SELECT))) 43 COBALT_LED_PORT = COBALT_LED_RESET; 44 45 for (mark = jiffies; jiffies - mark < HZ;) 46 ; 47 } 48 } 49 50 void cobalt_machine_restart(char *command) 51 { 52 COBALT_LED_PORT = COBALT_LED_RESET; 53 54 /* we should never get here */ 55 cobalt_machine_halt(); 56 } 57 58 /* 59 * This triggers the luser mode device driver for the power switch ;-) 60 */ 61 void cobalt_machine_power_off(void) 62 { 63 printk("You can switch the machine off now.\n"); 64 cobalt_machine_halt(); 65 } 66