5 * NetWinder Button Driver-
6 * Copyright (C) Alex Holden <alex@linuxhacker.org> 1998, 1999.
9 #ifdef __NWBUTTON_C /* Actually compiling the driver itself */
11 /* Various defines: */
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 */
18 /* Structure definitions: */
20 struct button_callback {
21 void (*callback) (void);
25 /* Function prototypes: */
27 static void button_sequence_finished (unsigned long parameters);
28 static irqreturn_t button_handler (int irq, void *dev_id, struct pt_regs *regs);
29 static int button_read (struct file *filp, char *buffer,
30 size_t count, loff_t *ppos);
31 int button_init (void);
32 int button_add_callback (void (*callback) (void), int count);
33 int button_del_callback (void (*callback) (void));
34 static void button_consume_callbacks (int bpcount);
36 #else /* Not compiling the driver itself */
38 extern int button_add_callback (void (*callback) (void), int count);
39 extern int button_del_callback (void (*callback) (void));
41 #endif /* __NWBUTTON_C */
42 #endif /* __NWBUTTON_H */