1#ifndef __NWBUTTON_H 2#define __NWBUTTON_H 3 4/* 5 * NetWinder Button Driver- 6 * Copyright (C) Alex Holden <alex@linuxhacker.org> 1998, 1999. 7 */ 8 9#ifdef __NWBUTTON_C /* Actually compiling the driver itself */ 10 11/* Various defines: */ 12 13#define NUM_PRESSES_REBOOT 2 /* How many presses to activate shutdown */ 14#define BUTTON_DELAY 30 /* How many jiffies for sequence to end */ 15#define VERSION "0.3" /* Driver version number */ 16#define BUTTON_MINOR 158 /* Major 10, Minor 158, /dev/nwbutton */ 17 18/* Structure definitions: */ 19 20struct button_callback { 21 void (*callback) (void); 22 int count; 23}; 24 25/* Function prototypes: */ 26 27static void button_sequence_finished (unsigned long parameters); 28static irqreturn_t button_handler (int irq, void *dev_id); 29int button_init (void); 30int button_add_callback (void (*callback) (void), int count); 31int button_del_callback (void (*callback) (void)); 32static void button_consume_callbacks (int bpcount); 33 34#else /* Not compiling the driver itself */ 35 36extern int button_add_callback (void (*callback) (void), int count); 37extern int button_del_callback (void (*callback) (void)); 38 39#endif /* __NWBUTTON_C */ 40#endif /* __NWBUTTON_H */ 41