0e8266437c
This adds driver code for the PMI device found in future IBM products. PMI stands for "Platform Management Interrupt" and is a way to communicate with the BMC (Baseboard Management Controller). It provides bidirectional communication with a low latency. Signed-off-by: Christian Krafft <krafft@de.ibm.com> Acked-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Acked-by: Heiko J Schick <schickhj@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
#ifndef _POWERPC_PMI_H
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#define _POWERPC_PMI_H
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/*
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* Definitions for talking with PMI device on PowerPC
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*
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* PMI (Platform Management Interrupt) is a way to communicate
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* with the BMC (Baseboard Management Controller) via interrupts.
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* Unlike IPMI it is bidirectional and has a low latency.
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*
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* (C) Copyright IBM Deutschland Entwicklung GmbH 2005
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*
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* Author: Christian Krafft <krafft@de.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifdef __KERNEL__
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#include <asm/of_device.h>
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#define PMI_TYPE_FREQ_CHANGE 0x01
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#define PMI_READ_TYPE 0
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#define PMI_READ_DATA0 1
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#define PMI_READ_DATA1 2
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#define PMI_READ_DATA2 3
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#define PMI_WRITE_TYPE 4
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#define PMI_WRITE_DATA0 5
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#define PMI_WRITE_DATA1 6
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#define PMI_WRITE_DATA2 7
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#define PMI_ACK 0x80
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#define PMI_TIMEOUT 100
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typedef struct {
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u8 type;
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u8 data0;
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u8 data1;
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u8 data2;
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} pmi_message_t;
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struct pmi_handler {
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struct list_head node;
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u8 type;
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void (*handle_pmi_message) (struct of_device *, pmi_message_t);
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};
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void pmi_register_handler(struct of_device *, struct pmi_handler *);
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void pmi_unregister_handler(struct of_device *, struct pmi_handler *);
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void pmi_send_message(struct of_device *, pmi_message_t);
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#endif /* __KERNEL__ */
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#endif /* _POWERPC_PMI_H */
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