[POWERPC] Add PMI driver for cell blade
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>
diff --git a/include/asm-powerpc/pmi.h b/include/asm-powerpc/pmi.h
new file mode 100644
index 0000000..cb0f8aa
--- /dev/null
+++ b/include/asm-powerpc/pmi.h
@@ -0,0 +1,67 @@
+#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 */