Viewing file:  nwbutton.h (1.31 KB) -rw-r--r--
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#ifndef __NWBUTTON_H
#define __NWBUTTON_H
/*
* NetWinder Button Driver-
* Copyright (C) Alex Holden <alex@linuxhacker.org> 1998, 1999.
*/
#ifdef __NWBUTTON_C /* Actually compiling the driver itself */
/* Various defines: */
#define NUM_PRESSES_REBOOT 2 /* How many presses to activate shutdown */
#define BUTTON_DELAY 30 /* How many jiffies for sequence to end */
#define VERSION "0.3" /* Driver version number */
#define BUTTON_MINOR 158 /* Major 10, Minor 158, /dev/nwbutton */
/* Structure definitions: */
struct button_callback {
void (*callback) (void);
int count;
};
/* Function prototypes: */
static void button_sequence_finished (unsigned long parameters);
static void button_handler (int irq, void *dev_id, struct pt_regs *regs);
static int button_read (struct file *filp, char *buffer,
size_t count, loff_t *ppos);
int button_init (void);
int button_add_callback (void (*callback) (void), int count);
int button_del_callback (void (*callback) (void));
static void button_consume_callbacks (int bpcount);
#ifdef MODULE
int init_module (void);
void cleanup_module (void);
#endif /* MODULE */
#else /* Not compiling the driver itself */
extern int button_add_callback (void (*callback) (void), int count);
extern int button_del_callback (void (*callback) (void));
#endif /* __NWBUTTON_C */
#endif /* __NWBUTTON_H */
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