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((u8 *)dh, dh->length);
77 }
78
79 #endif /* __PLATFORM_DATA_X86_SIMATIC_IPC_H */
80
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