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 /* 38 * This is an function to send an RPC message over an IPC channel. 39 * It is called by client-side SCFW API function shims. 40 * 41 * @param[in] ipc IPC handle 42 * @param[in,out] msg handle to a message 43 * @param[in] have_resp response flag 44 * 45 * If have_resp is true then this function waits for a response 46 * and returns the result in msg. 47 */ 48 int imx_scu_call_rpc(struct imx_sc_ipc *ipc, void *msg, bool have_resp); 49 50 /* 51 * This function gets the default ipc handle used by SCU 52 * 53 * @param[out] ipc sc ipc handle 54 * 55 * @return Returns an error code (0 = success, failed if < 0) 56 */ 57 int imx_scu_get_handle(struct imx_sc_ipc **ipc); 58 #endif /* _SC_IPC_H */ 59