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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Siemens SIMATIC IPC drivers
*
* Copyright (c) Siemens AG, 2018-2021
*
* Authors:
* Henning Schild <henning.schild@siemens.com>
* Gerd Haeussler <gerd.haeussler.ext@siemens.com>
*/
#ifndef __PLATFORM_DATA_X86_SIMATIC_IPC_H
#define __PLATFORM_DATA_X86_SIMATIC_IPC_H
#include <linux/dmi.h>
#include <linux/platform_data/x86/simatic-ipc-base.h>
#define SIMATIC_IPC_DMI_ENTRY_OEM 129
/* binary type */
#define SIMATIC_IPC_DMI_TYPE 0xff
#define SIMATIC_IPC_DMI_GROUP 0x05
#define SIMATIC_IPC_DMI_ENTRY 0x02
#define SIMATIC_IPC_DMI_TID 0x02
enum simatic_ipc_station_ids {
SIMATIC_IPC_INVALID_STATION_ID = 0,
SIMATIC_IPC_IPC227D = 0x00000501,
SIMATIC_IPC_IPC427D = 0x00000701,
SIMATIC_IPC_IPC227E = 0x00000901,
SIMATIC_IPC_IPC277E = 0x00000902,
SIMATIC_IPC_IPC427E = 0x00000A01,
SIMATIC_IPC_IPC477E = 0x00000A02,
SIMATIC_IPC_IPC127E = 0x00000D01,
};
static inline u32 simatic_ipc_get_station_id(u8 *data, int max_len)
{
struct {
u8 type; /* type (0xff = binary) */
u8 len; /* len of data entry */
u8 group;
u8 entry;
u8 tid;
__le32 station_id; /* station id (LE) */
} __packed * data_entry = (void *)data + sizeof(struct dmi_header);
while ((u8 *)data_entry < data + max_len) {
if (data_entry->type == SIMATIC_IPC_DMI_TYPE &&
data_entry->len == sizeof(*data_entry) &&
data_entry->group == SIMATIC_IPC_DMI_GROUP &&
data_entry->entry == SIMATIC_IPC_DMI_ENTRY &&
data_entry->tid == SIMATIC_IPC_DMI_TID) {
return le32_to_cpu(data_entry->station_id);
}
data_entry = (void *)((u8 *)(data_entry) + data_entry->len);
}
return SIMATIC_IPC_INVALID_STATION_ID;
}
static inline void
simatic_ipc_find_dmi_entry_helper(const struct dmi_header *dh, void *_data)
{
u32 *id = _data;
if (dh->type != SIMATIC_IPC_DMI_ENTRY_OEM)
return;
*id = simatic_ipc_get_station_id((u8 *)dh, dh->length);
}
#endif /* __PLATFORM_DATA_X86_SIMATIC_IPC_H */
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