1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
2 | /* |
3 | * Copyright 2018 NXP |
4 | * |
5 | * Header file for the IPC implementation. |
6 | */ |
7 | |
8 | #ifndef _SC_IPC_H |
9 | #define _SC_IPC_H |
10 | |
11 | #include <linux/device.h> |
12 | #include <linux/types.h> |
13 | |
14 | #define IMX_SC_RPC_VERSION 1 |
15 | #define IMX_SC_RPC_MAX_MSG 8 |
16 | |
17 | struct imx_sc_ipc; |
18 | |
19 | enum imx_sc_rpc_svc { |
20 | IMX_SC_RPC_SVC_UNKNOWN = 0, |
21 | IMX_SC_RPC_SVC_RETURN = 1, |
22 | IMX_SC_RPC_SVC_PM = 2, |
23 | IMX_SC_RPC_SVC_RM = 3, |
24 | IMX_SC_RPC_SVC_TIMER = 5, |
25 | IMX_SC_RPC_SVC_PAD = 6, |
26 | IMX_SC_RPC_SVC_MISC = 7, |
27 | IMX_SC_RPC_SVC_IRQ = 8, |
28 | }; |
29 | |
30 | struct imx_sc_rpc_msg { |
31 | uint8_t ver; |
32 | uint8_t size; |
33 | uint8_t svc; |
34 | uint8_t func; |
35 | }; |
36 | |
37 | #ifdef CONFIG_IMX_SCU |
38 | /* |
39 | * This is an function to send an RPC message over an IPC channel. |
40 | * It is called by client-side SCFW API function shims. |
41 | * |
42 | * @param[in] ipc IPC handle |
43 | * @param[in,out] msg handle to a message |
44 | * @param[in] have_resp response flag |
45 | * |
46 | * If have_resp is true then this function waits for a response |
47 | * and returns the result in msg. |
48 | */ |
49 | int imx_scu_call_rpc(struct imx_sc_ipc *ipc, void *msg, bool have_resp); |
50 | |
51 | /* |
52 | * This function gets the default ipc handle used by SCU |
53 | * |
54 | * @param[out] ipc sc ipc handle |
55 | * |
56 | * @return Returns an error code (0 = success, failed if < 0) |
57 | */ |
58 | int imx_scu_get_handle(struct imx_sc_ipc **ipc); |
59 | #else |
60 | static inline int imx_scu_call_rpc(struct imx_sc_ipc *ipc, void *msg, |
61 | bool have_resp) |
62 | { |
63 | return -ENOTSUPP; |
64 | } |
65 | |
66 | static inline int imx_scu_get_handle(struct imx_sc_ipc **ipc) |
67 | { |
68 | return -ENOTSUPP; |
69 | } |
70 | #endif |
71 | #endif /* _SC_IPC_H */ |
72 | |