/* superbird header file
 * 
 * This header file is shared be userspace programs and the kernel driver.
 *
 * Author: Karl Koscher
 * Version: 0.1
 */

#include <linux/ioctl.h>

/* Status byte format:
 *
 * 4 MSBs are reserved.
 * Lower 4 MSBs: [PSEL2 PSEL1 LJOG RJOG]
 *
 * All switches are active low.
 *
 * PSEL1 is the top switch, while PSEL2 is the bottom switch.
 *
 * LJOG and RJOG are outputs from the jog dial. When both are low,
 * the dial is pressed down. When only LJOG is low, the dial is
 * being pushed up. When only RJOG is low, the dial is being pushed
 * down.
 * 
 * A stream of status byte updates are available by reading the
 * device file. You can also use ioctls to poll the current status.
 */

/* ioctl definitions */

#define SUPERBIRD_IOCTL_MAGIC 'd'

#define SUPERBIRD_GET_STATUS		_IOR(SUPERBIRD_IOCTL_MAGIC, 0xE0, char)
#define SUPERBIRD_GET_USB_PWR		_IOR(SUPERBIRD_IOCTL_MAGIC, 0xE1, char)
#define SUPERBIRD_SET_USB_PWR		_IOR(SUPERBIRD_IOCTL_MAGIC, 0xE2, char)
#define SUPERBIRD_POWER_DOWN		_IO(SUPERBIRD_IOCTL_MAGIC, 0xEF) /* Use with caution! */