| /* |
| * (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); |