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firmware: imx: add misc svc support

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Add SCU MISC SVC support which provides misc control get/set functions.

Cc: Shawn Guo <shawnguo@kernel.org>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Dong Aisheng 2018-10-07 21:04:43 +08:00 • committed by Shawn Guo
parent edbee095fa
commit 15e1f2bc8b
4 changed files with 156 additions and 1 deletions
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99
drivers/firmware/imx/misc.c Normal file
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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_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);