pmi.h

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#ifndef _POWERPC_PMI_H
#define _POWERPC_PMI_H

/*
 * Definitions for talking with PMI device on PowerPC
 *
 * PMI (Platform Management Interrupt) is a way to communicate
 * with the BMC (Baseboard Management Controller) via interrupts.
 * Unlike IPMI it is bidirectional and has a low latency.
 *
 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
 *
 * Author: Christian Krafft <[email protected]>
 *
 * 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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifdef __KERNEL__

#define PMI_TYPE_FREQ_CHANGE    0x01
#define PMI_TYPE_POWER_BUTTON   0x02
#define PMI_READ_TYPE       0
#define PMI_READ_DATA0      1
#define PMI_READ_DATA1      2
#define PMI_READ_DATA2      3
#define PMI_WRITE_TYPE      4
#define PMI_WRITE_DATA0     5
#define PMI_WRITE_DATA1     6
#define PMI_WRITE_DATA2     7

#define PMI_ACK         0x80

#define PMI_TIMEOUT     100

typedef struct {
    u8  type;
    u8  data0;
    u8  data1;
    u8  data2;
} pmi_message_t;

struct pmi_handler {
    struct list_head node;
    u8 type;
    void (*handle_pmi_message) (pmi_message_t);
};

int pmi_register_handler(struct pmi_handler *);
void pmi_unregister_handler(struct pmi_handler *);

int pmi_send_message(pmi_message_t);

#endif /* __KERNEL__ */
#endif /* _POWERPC_PMI_H */