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/*
* thinkpad_ec.h - interface to ThinkPad embedded controller LPC3 functions
*
* Copyright (C) 2005 Shem Multinymous <multinymous@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _THINKPAD_EC_H
#define _THINKPAD_EC_H
#ifdef __KERNEL__
#define TP_CONTROLLER_ROW_LEN 16
/* EC transactions input and output (possibly partial) vectors of 16 bytes. */
struct thinkpad_ec_row {
u16 mask; /* bitmap of which entries of val[] are meaningful */
u8 val[TP_CONTROLLER_ROW_LEN];
};
extern int __must_check thinkpad_ec_lock(void);
extern int __must_check thinkpad_ec_try_lock(void);
extern void thinkpad_ec_unlock(void);
extern int thinkpad_ec_read_row(const struct thinkpad_ec_row *args,
struct thinkpad_ec_row *data);
extern int thinkpad_ec_try_read_row(const struct thinkpad_ec_row *args,
struct thinkpad_ec_row *mask);
extern int thinkpad_ec_prefetch_row(const struct thinkpad_ec_row *args);
extern void thinkpad_ec_invalidate(void);
#endif /* __KERNEL */
#endif /* _THINKPAD_EC_H */
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