diff options
Diffstat (limited to 'kernel/ethosu_driver.c')
| -rw-r--r-- | kernel/ethosu_driver.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/kernel/ethosu_driver.c b/kernel/ethosu_driver.c new file mode 100644 index 0000000..3fc752b --- /dev/null +++ b/kernel/ethosu_driver.c @@ -0,0 +1,161 @@ +/* + * (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); |