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 | |
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_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 | |
43 | static 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 | |
68 | static inline void |
69 | simatic_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(data: (u8 *)dh, max_len: dh->length); |
77 | } |
78 | |
79 | #endif /* __PLATFORM_DATA_X86_SIMATIC_IPC_H */ |
80 | |