M7350/kernel/arch/arm/mach-msm/qdsp6v2/adsp-loader.c

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2024-09-09 08:52:07 +00:00
/*
* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <mach/subsystem_restart.h>
#include <mach/qdsp6v2/apr.h>
#include <linux/of_device.h>
#define Q6_PIL_GET_DELAY_MS 100
struct adsp_loader_private {
void *pil_h;
};
static int adsp_loader_probe(struct platform_device *pdev)
{
struct adsp_loader_private *priv;
int rc = 0;
const char *adsp_dt = "qcom,adsp-state";
u32 adsp_state;
rc = of_property_read_u32(pdev->dev.of_node, adsp_dt, &adsp_state);
if (rc) {
dev_err(&pdev->dev,
"%s: ADSP state = %x\n", __func__, adsp_state);
return rc;
}
if (adsp_state == APR_SUBSYS_DOWN) {
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
platform_set_drvdata(pdev, priv);
priv->pil_h = subsystem_get("adsp");
if (IS_ERR(priv->pil_h)) {
pr_err("%s: pil get adsp failed, error:%d\n",
__func__, rc);
devm_kfree(&pdev->dev, priv);
goto fail;
}
/* Set the state of the ADSP in APR driver */
apr_set_q6_state(APR_SUBSYS_LOADED);
} else if (adsp_state == APR_SUBSYS_LOADED) {
dev_dbg(&pdev->dev,
"%s:MDM9x25 ADSP state = %x\n", __func__, adsp_state);
apr_set_q6_state(APR_SUBSYS_LOADED);
}
/* Query for MMPM API */
pr_info("%s: Q6/ADSP image is loaded\n", __func__);
fail:
return rc;
}
static int adsp_loader_remove(struct platform_device *pdev)
{
struct adsp_loader_private *priv;
priv = platform_get_drvdata(pdev);
if (priv != NULL)
subsystem_put(priv->pil_h);
pr_info("%s: Q6/ADSP image is unloaded\n", __func__);
return 0;
}
static const struct of_device_id adsp_loader_dt_match[] = {
{ .compatible = "qcom,adsp-loader" },
{ }
};
MODULE_DEVICE_TABLE(of, adsp_loader_dt_match);
static struct platform_driver adsp_loader_driver = {
.driver = {
.name = "adsp-loader",
.owner = THIS_MODULE,
.of_match_table = adsp_loader_dt_match,
},
.probe = adsp_loader_probe,
.remove = __devexit_p(adsp_loader_remove),
};
static int __init adsp_loader_init(void)
{
return platform_driver_register(&adsp_loader_driver);
}
module_init(adsp_loader_init);
static void __exit adsp_loader_exit(void)
{
platform_driver_unregister(&adsp_loader_driver);
}
module_exit(adsp_loader_exit);
MODULE_DESCRIPTION("ADSP Loader module");
MODULE_LICENSE("GPL v2");