// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright 2025 NXP
 */

#include <linux/firmware/imx/sm.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/scmi_protocol.h>
#include <linux/scmi_imx_protocol.h>

static const struct scmi_imx_cpu_proto_ops *imx_cpu_ops;
static struct scmi_protocol_handle *ph;

int scmi_imx_cpu_reset_vector_set(u32 cpuid, u64 vector, bool start, bool boot,
                                  bool resume)
{
        if (!ph)
                return -EPROBE_DEFER;

        return imx_cpu_ops->cpu_reset_vector_set(ph, cpuid, vector, start,
                                                 boot, resume);
}
EXPORT_SYMBOL(scmi_imx_cpu_reset_vector_set);

int scmi_imx_cpu_start(u32 cpuid, bool start)
{
        if (!ph)
                return -EPROBE_DEFER;

        if (start)
                return imx_cpu_ops->cpu_start(ph, cpuid, true);

        return imx_cpu_ops->cpu_start(ph, cpuid, false);
};
EXPORT_SYMBOL(scmi_imx_cpu_start);

int scmi_imx_cpu_started(u32 cpuid, bool *started)
{
        if (!ph)
                return -EPROBE_DEFER;

        if (!started)
                return -EINVAL;

        return imx_cpu_ops->cpu_started(ph, cpuid, started);
};
EXPORT_SYMBOL(scmi_imx_cpu_started);

static int scmi_imx_cpu_probe(struct scmi_device *sdev)
{
        const struct scmi_handle *handle = sdev->handle;

        if (!handle)
                return -ENODEV;

        if (imx_cpu_ops) {
                dev_err(&sdev->dev, "sm cpu already initialized\n");
                return -EEXIST;
        }

        imx_cpu_ops = handle->devm_protocol_get(sdev, SCMI_PROTOCOL_IMX_CPU, &ph);
        if (IS_ERR(imx_cpu_ops))
                return PTR_ERR(imx_cpu_ops);

        return 0;
}

static const struct scmi_device_id scmi_id_table[] = {
        { SCMI_PROTOCOL_IMX_CPU, "imx-cpu" },
        { },
};
MODULE_DEVICE_TABLE(scmi, scmi_id_table);

static struct scmi_driver scmi_imx_cpu_driver = {
        .name = "scmi-imx-cpu",
        .probe = scmi_imx_cpu_probe,
        .id_table = scmi_id_table,
};
module_scmi_driver(scmi_imx_cpu_driver);

MODULE_AUTHOR("Peng Fan <peng.fan@nxp.com>");
MODULE_DESCRIPTION("IMX SM CPU driver");
MODULE_LICENSE("GPL");