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 void button_handler (int irq, void *dev_id, struct pt_regs *regs); 29static int button_read (struct file *filp, char *buffer, 30 size_t count, loff_t *ppos); 31int button_init (void); 32int button_add_callback (void (*callback) (void), int count); 33int button_del_callback (void (*callback) (void)); 34static void button_consume_callbacks (int bpcount); 35#ifdef MODULE 36int init_module (void); 37void cleanup_module (void); 38#endif /* MODULE */ 39 40#else /* Not compiling the driver itself */ 41 42extern int button_add_callback (void (*callback) (void), int count); 43extern int button_del_callback (void (*callback) (void)); 44 45#endif /* __NWBUTTON_C */ 46#endif /* __NWBUTTON_H */ 47