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 20 struct button_callback { 21 void (*callback) (void); 22 int count; 23 }; 24 25 /* Function prototypes: */ 26 27 static void button_sequence_finished (unsigned long parameters); 28 static irqreturn_t button_handler (int irq, void *dev_id); 29 int button_init (void); 30 int button_add_callback (void (*callback) (void), int count); 31 int button_del_callback (void (*callback) (void)); 32 static void button_consume_callbacks (int bpcount); 33 34 #else /* Not compiling the driver itself */ 35 36 extern int button_add_callback (void (*callback) (void), int count); 37 extern int button_del_callback (void (*callback) (void)); 38 39 #endif /* __NWBUTTON_C */ 40 #endif /* __NWBUTTON_H */ 41