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 void 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 int init_module (void);
37 void cleanup_module (void);
40 #else /* Not compiling the driver itself */
42 extern int button_add_callback (void (*callback
) (void), int count
);
43 extern int button_del_callback (void (*callback
) (void));
45 #endif /* __NWBUTTON_C */
46 #endif /* __NWBUTTON_H */