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