diff options
Diffstat (limited to 'kernel/include/linux/libps2.h')
| -rw-r--r-- | kernel/include/linux/libps2.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/kernel/include/linux/libps2.h b/kernel/include/linux/libps2.h new file mode 100644 index 000000000..4ad06e824 --- /dev/null +++ b/kernel/include/linux/libps2.h @@ -0,0 +1,56 @@ +#ifndef _LIBPS2_H +#define _LIBPS2_H + +/* + * Copyright (C) 1999-2002 Vojtech Pavlik + * Copyright (C) 2004 Dmitry Torokhov + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + */ + + +#define PS2_CMD_GETID 0x02f2 +#define PS2_CMD_RESET_BAT 0x02ff + +#define PS2_RET_BAT 0xaa +#define PS2_RET_ID 0x00 +#define PS2_RET_ACK 0xfa +#define PS2_RET_NAK 0xfe +#define PS2_RET_ERR 0xfc + +#define PS2_FLAG_ACK 1 /* Waiting for ACK/NAK */ +#define PS2_FLAG_CMD 2 /* Waiting for command to finish */ +#define PS2_FLAG_CMD1 4 /* Waiting for the first byte of command response */ +#define PS2_FLAG_WAITID 8 /* Command execiting is GET ID */ +#define PS2_FLAG_NAK 16 /* Last transmission was NAKed */ + +struct ps2dev { + struct serio *serio; + + /* Ensures that only one command is executing at a time */ + struct mutex cmd_mutex; + + /* Used to signal completion from interrupt handler */ + wait_queue_head_t wait; + + unsigned long flags; + unsigned char cmdbuf[8]; + unsigned char cmdcnt; + unsigned char nak; +}; + +void ps2_init(struct ps2dev *ps2dev, struct serio *serio); +int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout); +void ps2_drain(struct ps2dev *ps2dev, int maxbytes, int timeout); +void ps2_begin_command(struct ps2dev *ps2dev); +void ps2_end_command(struct ps2dev *ps2dev); +int __ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command); +int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command); +int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data); +int ps2_handle_response(struct ps2dev *ps2dev, unsigned char data); +void ps2_cmd_aborted(struct ps2dev *ps2dev); +int ps2_is_keyboard_id(char id); + +#endif /* _LIBPS2_H */ |