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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Freescale Semiconductor, Inc.
* Copyright 2017~2018 NXP
* Author: Dong Aisheng <aisheng.dong@nxp.com>
*
* File containing client-side RPC functions for the MISC service. These
* function are ported to clients that communicate to the SC.
*
*/
#include <linux/firmware/imx/svc/misc.h>
struct imx_sc_msg_req_misc_set_ctrl {
struct imx_sc_rpc_msg hdr;
u32 ctrl;
u32 val;
u16 resource;
} __packed;
struct imx_sc_msg_req_cpu_start {
struct imx_sc_rpc_msg hdr;
u32 address_hi;
u32 address_lo;
u16 resource;
u8 enable;
} __packed;
struct imx_sc_msg_req_misc_get_ctrl {
struct imx_sc_rpc_msg hdr;
u32 ctrl;
u16 resource;
} __packed;
struct imx_sc_msg_resp_misc_get_ctrl {
struct imx_sc_rpc_msg hdr;
u32 val;
} __packed;
/*
* This function sets a miscellaneous control value.
*
* @param[in] ipc IPC handle
* @param[in] resource resource the control is associated with
* @param[in] ctrl control to change
* @param[in] val value to apply to the control
*
* @return Returns 0 for success and < 0 for errors.
*/
int imx_sc_misc_set_control(struct imx_sc_ipc *ipc, u32 resource,
u8 ctrl, u32 val)
{
struct imx_sc_msg_req_misc_set_ctrl msg;
struct imx_sc_rpc_msg *hdr = &msg.hdr;
hdr->ver = IMX_SC_RPC_VERSION;
hdr->svc = (uint8_t)IMX_SC_RPC_SVC_MISC;
hdr->func = (uint8_t)IMX_SC_MISC_FUNC_SET_CONTROL;
hdr->size = 4;
msg.ctrl = ctrl;
msg.val = val;
msg.resource = resource;
return imx_scu_call_rpc(ipc, &msg, true);
}
EXPORT_SYMBOL(imx_sc_misc_set_control);
/*
* This function gets a miscellaneous control value.
*
* @param[in] ipc IPC handle
* @param[in] resource resource the control is associated with
* @param[in] ctrl control to get
* @param[out] val pointer to return the control value
*
* @return Returns 0 for success and < 0 for errors.
*/
int imx_sc_misc_get_control(struct imx_sc_ipc *ipc, u32 resource,
u8 ctrl, u32 *val)
{
struct imx_sc_msg_req_misc_get_ctrl msg;
struct imx_sc_msg_resp_misc_get_ctrl *resp;
struct imx_sc_rpc_msg *hdr = &msg.hdr;
int ret;
hdr->ver = IMX_SC_RPC_VERSION;
hdr->svc = (uint8_t)IMX_SC_RPC_SVC_MISC;
hdr->func = (uint8_t)IMX_SC_MISC_FUNC_GET_CONTROL;
hdr->size = 3;
msg.ctrl = ctrl;
msg.resource = resource;
ret = imx_scu_call_rpc(ipc, &msg, true);
if (ret)
return ret;
resp = (struct imx_sc_msg_resp_misc_get_ctrl *)&msg;
if (val != NULL)
*val = resp->val;
return 0;
}
EXPORT_SYMBOL(imx_sc_misc_get_control);
/*
* This function starts/stops a CPU identified by @resource
*
* @param[in] ipc IPC handle
* @param[in] resource resource the control is associated with
* @param[in] enable true for start, false for stop
* @param[in] phys_addr initial instruction address to be executed
*
* @return Returns 0 for success and < 0 for errors.
*/
int imx_sc_pm_cpu_start(struct imx_sc_ipc *ipc, u32 resource,
bool enable, u64 phys_addr)
{
struct imx_sc_msg_req_cpu_start msg;
struct imx_sc_rpc_msg *hdr = &msg.hdr;
hdr->ver = IMX_SC_RPC_VERSION;
hdr->svc = IMX_SC_RPC_SVC_PM;
hdr->func = IMX_SC_PM_FUNC_CPU_START;
hdr->size = 4;
msg.address_hi = phys_addr >> 32;
msg.address_lo = phys_addr;
msg.resource = resource;
msg.enable = enable;
return imx_scu_call_rpc(ipc, &msg, true);
}
EXPORT_SYMBOL(imx_sc_pm_cpu_start);
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