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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#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, struct pt_regs *regs);
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 */