76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Siemens SIMATIC IPC drivers
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*
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* Copyright (c) Siemens AG, 2018-2021
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*
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* Authors:
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* Henning Schild <henning.schild@siemens.com>
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* Gerd Haeussler <gerd.haeussler.ext@siemens.com>
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*/
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#ifndef __PLATFORM_DATA_X86_SIMATIC_IPC_H
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#define __PLATFORM_DATA_X86_SIMATIC_IPC_H
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#include <linux/dmi.h>
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#include <linux/platform_data/x86/simatic-ipc-base.h>
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#define SIMATIC_IPC_DMI_ENTRY_OEM 129
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/* binary type */
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#define SIMATIC_IPC_DMI_TYPE 0xff
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#define SIMATIC_IPC_DMI_GROUP 0x05
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#define SIMATIC_IPC_DMI_ENTRY 0x02
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#define SIMATIC_IPC_DMI_TID 0x02
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enum simatic_ipc_station_ids {
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SIMATIC_IPC_INVALID_STATION_ID = 0,
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SIMATIC_IPC_IPC227D = 0x00000501,
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SIMATIC_IPC_IPC427D = 0x00000701,
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SIMATIC_IPC_IPC227E = 0x00000901,
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SIMATIC_IPC_IPC277E = 0x00000902,
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SIMATIC_IPC_IPC427E = 0x00000A01,
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SIMATIC_IPC_IPC477E = 0x00000A02,
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SIMATIC_IPC_IPC127E = 0x00000D01,
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SIMATIC_IPC_IPC227G = 0x00000F01,
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SIMATIC_IPC_IPCBX_39A = 0x00001001,
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SIMATIC_IPC_IPCPX_39A = 0x00001002,
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};
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static inline u32 simatic_ipc_get_station_id(u8 *data, int max_len)
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{
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struct {
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u8 type; /* type (0xff = binary) */
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u8 len; /* len of data entry */
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u8 group;
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u8 entry;
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u8 tid;
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__le32 station_id; /* station id (LE) */
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} __packed * data_entry = (void *)data + sizeof(struct dmi_header);
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while ((u8 *)data_entry < data + max_len) {
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if (data_entry->type == SIMATIC_IPC_DMI_TYPE &&
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data_entry->len == sizeof(*data_entry) &&
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data_entry->group == SIMATIC_IPC_DMI_GROUP &&
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data_entry->entry == SIMATIC_IPC_DMI_ENTRY &&
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data_entry->tid == SIMATIC_IPC_DMI_TID) {
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return le32_to_cpu(data_entry->station_id);
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}
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data_entry = (void *)((u8 *)(data_entry) + data_entry->len);
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}
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return SIMATIC_IPC_INVALID_STATION_ID;
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}
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static inline void
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simatic_ipc_find_dmi_entry_helper(const struct dmi_header *dh, void *_data)
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{
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u32 *id = _data;
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if (dh->type != SIMATIC_IPC_DMI_ENTRY_OEM)
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return;
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*id = simatic_ipc_get_station_id((u8 *)dh, dh->length);
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}
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#endif /* __PLATFORM_DATA_X86_SIMATIC_IPC_H */
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