1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Siemens SIMATIC IPC drivers 4 * 5 * Copyright (c) Siemens AG, 2018-2021 6 * 7 * Authors: 8 * Henning Schild <[email protected]> 9 * Gerd Haeussler <[email protected]> 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 25 enum 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_IPC427G = 0x00001001, 36 }; 37 38 static inline u32 simatic_ipc_get_station_id(u8 *data, int max_len) 39 { 40 struct { 41 u8 type; /* type (0xff = binary) */ 42 u8 len; /* len of data entry */ 43 u8 group; 44 u8 entry; 45 u8 tid; 46 __le32 station_id; /* station id (LE) */ 47 } __packed * data_entry = (void *)data + sizeof(struct dmi_header); 48 49 while ((u8 *)data_entry < data + max_len) { 50 if (data_entry->type == SIMATIC_IPC_DMI_TYPE && 51 data_entry->len == sizeof(*data_entry) && 52 data_entry->group == SIMATIC_IPC_DMI_GROUP && 53 data_entry->entry == SIMATIC_IPC_DMI_ENTRY && 54 data_entry->tid == SIMATIC_IPC_DMI_TID) { 55 return le32_to_cpu(data_entry->station_id); 56 } 57 data_entry = (void *)((u8 *)(data_entry) + data_entry->len); 58 } 59 60 return SIMATIC_IPC_INVALID_STATION_ID; 61 } 62 63 static inline void 64 simatic_ipc_find_dmi_entry_helper(const struct dmi_header *dh, void *_data) 65 { 66 u32 *id = _data; 67 68 if (dh->type != SIMATIC_IPC_DMI_ENTRY_OEM) 69 return; 70 71 *id = simatic_ipc_get_station_id((u8 *)dh, dh->length); 72 } 73 74 #endif /* __PLATFORM_DATA_X86_SIMATIC_IPC_H */ 75