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[POWERPC] Add PMI driver for cell blade

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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 <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Acked-by: Heiko J Schick <[email protected]>
Signed-off-by: Paul Mackerras <[email protected]>
This commit is contained in:
Christian Krafft 2007-02-14 14:09:45 +01:00 • committed by Paul Mackerras
commit 0e8266437c
5 changed files with 383 additions and 0 deletions
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67
include/asm-powerpc/pmi.h Normal file
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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 <krafft@de.ibm.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, 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__
#include <asm/of_device.h>
#define PMI_TYPE_FREQ_CHANGE 0x01
#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) (struct of_device *, pmi_message_t);
};
void pmi_register_handler(struct of_device *, struct pmi_handler *);
void pmi_unregister_handler(struct of_device *, struct pmi_handler *);
void pmi_send_message(struct of_device *, pmi_message_t);
#endif /* __KERNEL__ */
#endif /* _POWERPC_PMI_H */