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/*
* Copyright 2020-2023 Arm Limited and/or its affiliates
*
* 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/bitmap.h>
#include <linux/fs.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/rpmsg.h>
#include "ethosu_device.h"
#include "uapi/ethosu.h"
/****************************************************************************
* Defines
****************************************************************************/
#define ETHOSU_DRIVER_STR(s) #s
#define ETHOSU_DRIVER_VERSION_STR(major, minor, patch) \
ETHOSU_DRIVER_STR(major) "." \
ETHOSU_DRIVER_STR(minor) "." \
ETHOSU_DRIVER_STR(patch)
#define ETHOSU_DRIVER_VERSION ETHOSU_DRIVER_VERSION_STR( \
ETHOSU_KERNEL_DRIVER_VERSION_MAJOR, \
ETHOSU_KERNEL_DRIVER_VERSION_MINOR, \
ETHOSU_KERNEL_DRIVER_VERSION_PATCH)
#define ETHOSU_DRIVER_NAME "ethosu"
#define MINOR_BASE 0 /* Minor version starts at 0 */
#define MINOR_COUNT 64 /* Allocate minor versions */
/****************************************************************************
* Variables
****************************************************************************/
static struct class *ethosu_class;
static dev_t devt;
/****************************************************************************
* Rpmsg driver
****************************************************************************/
static int ethosu_rpmsg_probe(struct rpmsg_device *rpdev)
{
struct device *dev = &rpdev->dev;
int ret;
dev_info(dev, "%s", __FUNCTION__);
/* Initialize device */
ret = ethosu_dev_init(rpdev, ethosu_class, devt);
if (ret)
return ret;
return 0;
}
static void ethosu_rpmsg_remove(struct rpmsg_device *rpdev)
{
struct device *dev = &rpdev->dev;
dev_info(dev, "%s", __FUNCTION__);
ethosu_dev_deinit(rpdev);
}
static int ethosu_rpmsg_cb(struct rpmsg_device *rpdev,
void *data,
int len,
void *priv,
u32 src)
{
dev_err(&rpdev->dev, "%s", __FUNCTION__);
return -EINVAL;
}
static struct rpmsg_device_id ethosu_rpmsg_driver_id_table[] = {
{ .name = "ethos-u-0.0" },
{},
};
MODULE_DEVICE_TABLE(rpmsg, ethosu_rpmsg_driver_id_table);
static struct rpmsg_driver ethosu_rpmsg_driver = {
.drv = {
.name = ETHOSU_DRIVER_NAME,
.owner = THIS_MODULE,
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
.id_table = ethosu_rpmsg_driver_id_table,
.probe = ethosu_rpmsg_probe,
.callback = ethosu_rpmsg_cb,
.remove = ethosu_rpmsg_remove,
};
/****************************************************************************
* Module init and exit
****************************************************************************/
static void __exit ethosu_exit(void)
{
unregister_rpmsg_driver(ðosu_rpmsg_driver);
unregister_chrdev_region(devt, MINOR_COUNT);
class_destroy(ethosu_class);
}
static int __init ethosu_init(void)
{
int ret;
ethosu_class = class_create(THIS_MODULE, ETHOSU_DRIVER_NAME);
if (IS_ERR(ethosu_class)) {
pr_err("Failed to create class '%s'.\n", ETHOSU_DRIVER_NAME);
return PTR_ERR(ethosu_class);
}
ret = alloc_chrdev_region(&devt, MINOR_BASE, MINOR_COUNT,
ETHOSU_DRIVER_NAME);
if (ret) {
pr_err("Failed to allocate chrdev region.\n");
goto destroy_class;
}
ret = register_rpmsg_driver(ðosu_rpmsg_driver);
if (ret) {
pr_err("Failed to register Arm Ethos-U rpmsg driver.\n");
goto region_unregister;
}
return 0;
region_unregister:
unregister_chrdev_region(devt, MINOR_COUNT);
destroy_class:
class_destroy(ethosu_class);
return ret;
}
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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