72 lines
1.5 KiB
C
72 lines
1.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright 2018 NXP
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*
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* Header file for the IPC implementation.
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*/
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#ifndef _SC_IPC_H
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#define _SC_IPC_H
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#include <linux/device.h>
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#include <linux/types.h>
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#define IMX_SC_RPC_VERSION 1
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#define IMX_SC_RPC_MAX_MSG 8
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struct imx_sc_ipc;
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enum imx_sc_rpc_svc {
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IMX_SC_RPC_SVC_UNKNOWN = 0,
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IMX_SC_RPC_SVC_RETURN = 1,
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IMX_SC_RPC_SVC_PM = 2,
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IMX_SC_RPC_SVC_RM = 3,
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IMX_SC_RPC_SVC_TIMER = 5,
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IMX_SC_RPC_SVC_PAD = 6,
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IMX_SC_RPC_SVC_MISC = 7,
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IMX_SC_RPC_SVC_IRQ = 8,
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};
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struct imx_sc_rpc_msg {
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uint8_t ver;
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uint8_t size;
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uint8_t svc;
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uint8_t func;
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};
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#ifdef CONFIG_IMX_SCU
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/*
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* This is an function to send an RPC message over an IPC channel.
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* It is called by client-side SCFW API function shims.
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*
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* @param[in] ipc IPC handle
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* @param[in,out] msg handle to a message
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* @param[in] have_resp response flag
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*
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* If have_resp is true then this function waits for a response
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* and returns the result in msg.
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*/
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int imx_scu_call_rpc(struct imx_sc_ipc *ipc, void *msg, bool have_resp);
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/*
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* This function gets the default ipc handle used by SCU
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*
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* @param[out] ipc sc ipc handle
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*
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* @return Returns an error code (0 = success, failed if < 0)
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*/
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int imx_scu_get_handle(struct imx_sc_ipc **ipc);
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#else
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static inline int imx_scu_call_rpc(struct imx_sc_ipc *ipc, void *msg,
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bool have_resp)
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{
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return -ENOTSUPP;
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}
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static inline int imx_scu_get_handle(struct imx_sc_ipc **ipc)
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{
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return -ENOTSUPP;
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}
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#endif
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#endif /* _SC_IPC_H */
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