// SPDX-License-Identifier: GPL-2.0
//
// Copyright (c) 2019 MediaTek Inc.
#include <asm/barrier.h>
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/of_reserved_mem.h>
#include <linux/platform_device.h>
#include <linux/remoteproc.h>
#include <linux/remoteproc/mtk_scp.h>
#include <linux/rpmsg/mtk_rpmsg.h>
#include "mtk_common.h"
#include "remoteproc_internal.h"
#define MAX_CODE_SIZE 0x500000
#define SECTION_NAME_IPI_BUFFER ".ipi_buffer"
/**
* scp_get() - get a reference to SCP.
*
* @pdev: the platform device of the module requesting SCP platform
* device for using SCP API.
*
* Return: Return NULL if failed. otherwise reference to SCP.
**/
struct mtk_scp *scp_get(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *scp_node;
struct platform_device *scp_pdev;
scp_node = of_parse_phandle(dev->of_node, "mediatek,scp", 0);
if (!scp_node) {
dev_err(dev, "can't get SCP node\n");
return NULL;
}
scp_pdev = of_find_device_by_node(scp_node);
of_node_put(scp_node);
if (WARN_ON(!scp_pdev)) {
dev_err(dev, "SCP pdev failed\n");
return NULL;
}
return platform_get_drvdata(scp_pdev);
}
EXPORT_SYMBOL_GPL(scp_get);
/**
* scp_put() - "free" the SCP
*
* @scp: mtk_scp structure from scp_get().
**/
void scp_put(struct mtk_scp *scp)
{
put_device(scp->dev);
}
EXPORT_SYMBOL_GPL(scp_put);
static void scp_wdt_handler(struct mtk_scp *scp, u32 scp_to_host)
{
struct mtk_scp_of_cluster *scp_cluster = scp->cluster;
struct mtk_scp *scp_node;
dev_err(scp->dev, "SCP watchdog timeout! 0x%x", scp_to_host);
/* report watchdog timeout to all cores */
list_for_each_entry(scp_node, &scp_cluster->mtk_scp_list, elem)
rproc_report_crash(scp_node->rproc, RPROC_WATCHDOG);
}
static void scp_init_ipi_handler(void *data, unsigned int len, void *priv)
{
struct mtk_scp *scp = priv;
struct scp_run *run = data;
scp->run.signaled = run->signaled;
strscpy(scp->run.fw_ver, run->fw_ver, SCP_FW_VER_LEN);
scp->run.dec_capability = run->dec_capability;
scp->run.enc_capability = run->enc_capability;
wake_up_interruptible(&scp->run.wq);
}
static void scp_ipi_handler(struct</