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/*
* (C) COPYRIGHT 2020 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation, and any use by you of this program is subject to the terms
* of such GNU licence.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you can access it online at
* http://www.gnu.org/licenses/gpl-2.0.html.
*
* SPDX-License-Identifier: GPL-2.0-only
*/
#include <linux/module.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include "ethosu_device.h"
/****************************************************************************
* Defines
****************************************************************************/
#define ETHOSU_DRIVER_VERSION "1.0"
#define ETHOSU_DRIVER_NAME "ethosu"
/****************************************************************************
* Variables
****************************************************************************/
struct class *ethosu_class;
/****************************************************************************
* Arm Ethos-U
****************************************************************************/
static int ethosu_pdev_probe(struct platform_device *pdev)
{
struct ethosu_device *edev;
struct resource *in_queue_res;
struct resource *out_queue_res;
int ret;
dev_info(&pdev->dev, "Probe\n");
/* Get path to TCM memory */
in_queue_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"in_queue");
if (IS_ERR(in_queue_res)) {
dev_err(&pdev->dev, "Failed to get in_queue resource.\n");
return PTR_ERR(in_queue_res);
}
out_queue_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"out_queue");
if (IS_ERR(out_queue_res)) {
dev_err(&pdev->dev, "Failed to get out_queue resource.\n");
return PTR_ERR(out_queue_res);
}
/* Allocate memory for Arm Ethos-U device */
edev = devm_kzalloc(&pdev->dev, sizeof(*edev), GFP_KERNEL);
if (!edev)
return -ENOMEM;
platform_set_drvdata(pdev, edev);
/* Initialize device */
ret = ethosu_dev_init(edev, &pdev->dev, ethosu_class, in_queue_res,
out_queue_res);
if (ret)
goto free_dev;
return 0;
free_dev:
devm_kfree(&pdev->dev, edev);
return ret;
}
static int ethosu_pdev_remove(struct platform_device *pdev)
{
struct ethosu_device *edev = platform_get_drvdata(pdev);
dev_info(&pdev->dev, "Remove\n");
ethosu_dev_deinit(edev);
return 0;
}
static const struct of_device_id ethosu_pdev_match[] = {
{ .compatible = "arm,ethosu" },
{ /* Sentinel */ },
};
MODULE_DEVICE_TABLE(of, ethosu_pdev_match);
static struct platform_driver ethosu_pdev_driver = {
.probe = ðosu_pdev_probe,
.remove = ðosu_pdev_remove,
.driver = {
.name = ETHOSU_DRIVER_NAME,
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(ethosu_pdev_match),
},
};
/****************************************************************************
* Module init and exit
****************************************************************************/
static int __init ethosu_init(void)
{
int ret;
ethosu_class = class_create(THIS_MODULE, ETHOSU_DRIVER_NAME);
if (IS_ERR(ethosu_class)) {
printk("Failed to create class '%s'.\n", ETHOSU_DRIVER_NAME);
return PTR_ERR(ethosu_class);
}
ret = platform_driver_register(ðosu_pdev_driver);
if (ret) {
printk("Failed to register Arm Ethos-U platform driver.\n");
goto destroy_class;
}
return 0;
destroy_class:
class_destroy(ethosu_class);
return ret;
}
static void __exit ethosu_exit(void)
{
platform_driver_unregister(ðosu_pdev_driver);
class_destroy(ethosu_class);
}
module_init(ethosu_init)
module_exit(ethosu_exit)
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Arm Ltd");
MODULE_DESCRIPTION("Arm Ethos-U NPU Driver");
MODULE_VERSION(ETHOSU_DRIVER_VERSION);
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