1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Siemens SIMATIC IPC drivers 4 * 5 * Copyright (c) Siemens AG, 2018-2023 6 * 7 * Authors: 8 * Henning Schild <henning.schild@siemens.com> 9 * Gerd Haeussler <gerd.haeussler.ext@siemens.com> 10 */ 11 12#ifndef __PLATFORM_DATA_X86_SIMATIC_IPC_H 13#define __PLATFORM_DATA_X86_SIMATIC_IPC_H 14 15#include <linux/dmi.h> 16#include <linux/platform_data/x86/simatic-ipc-base.h> 17 18#define SIMATIC_IPC_DMI_ENTRY_OEM 129 19/* binary type */ 20#define SIMATIC_IPC_DMI_TYPE 0xff 21#define SIMATIC_IPC_DMI_GROUP 0x05 22#define SIMATIC_IPC_DMI_ENTRY 0x02 23#define SIMATIC_IPC_DMI_TID 0x02 24 25enum simatic_ipc_station_ids { 26 SIMATIC_IPC_INVALID_STATION_ID = 0, 27 SIMATIC_IPC_IPC227D = 0x00000501, 28 SIMATIC_IPC_IPC427D = 0x00000701, 29 SIMATIC_IPC_IPC227E = 0x00000901, 30 SIMATIC_IPC_IPC277E = 0x00000902, 31 SIMATIC_IPC_IPC427E = 0x00000A01, 32 SIMATIC_IPC_IPC477E = 0x00000A02, 33 SIMATIC_IPC_IPC127E = 0x00000D01, 34 SIMATIC_IPC_IPC227G = 0x00000F01, 35 SIMATIC_IPC_IPC277G = 0x00000F02, 36 SIMATIC_IPC_IPCBX_39A = 0x00001001, 37 SIMATIC_IPC_IPCPX_39A = 0x00001002, 38 SIMATIC_IPC_IPCBX_21A = 0x00001101, 39 SIMATIC_IPC_IPCBX_56A = 0x00001201, 40 SIMATIC_IPC_IPCBX_59A = 0x00001202, 41}; 42 43static inline u32 simatic_ipc_get_station_id(u8 *data, int max_len) 44{ 45 struct { 46 u8 type; /* type (0xff = binary) */ 47 u8 len; /* len of data entry */ 48 u8 group; 49 u8 entry; 50 u8 tid; 51 __le32 station_id; /* station id (LE) */ 52 } __packed * data_entry = (void *)data + sizeof(struct dmi_header); 53 54 while ((u8 *)data_entry < data + max_len) { 55 if (data_entry->type == SIMATIC_IPC_DMI_TYPE && 56 data_entry->len == sizeof(*data_entry) && 57 data_entry->group == SIMATIC_IPC_DMI_GROUP && 58 data_entry->entry == SIMATIC_IPC_DMI_ENTRY && 59 data_entry->tid == SIMATIC_IPC_DMI_TID) { 60 return le32_to_cpu(data_entry->station_id); 61 } 62 data_entry = (void *)((u8 *)(data_entry) + data_entry->len); 63 } 64 65 return SIMATIC_IPC_INVALID_STATION_ID; 66} 67 68static inline void 69simatic_ipc_find_dmi_entry_helper(const struct dmi_header *dh, void *_data) 70{ 71 u32 *id = _data; 72 73 if (dh->type != SIMATIC_IPC_DMI_ENTRY_OEM) 74 return; 75 76 *id = simatic_ipc_get_station_id((u8 *)dh, dh->length); 77} 78 79#endif /* __PLATFORM_DATA_X86_SIMATIC_IPC_H */ 80