Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 1 | /* |
| 2 | * (C) COPYRIGHT 2020 ARM Limited. All rights reserved. |
| 3 | * |
| 4 | * This program is free software and is provided to you under the terms of the |
| 5 | * GNU General Public License version 2 as published by the Free Software |
| 6 | * Foundation, and any use by you of this program is subject to the terms |
| 7 | * of such GNU licence. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, you can access it online at |
| 16 | * http://www.gnu.org/licenses/gpl-2.0.html. |
| 17 | * |
| 18 | * SPDX-License-Identifier: GPL-2.0-only |
| 19 | */ |
| 20 | |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/io.h> |
| 23 | #include <linux/of.h> |
| 24 | #include <linux/of_address.h> |
| 25 | #include <linux/platform_device.h> |
| 26 | |
| 27 | #include "ethosu_device.h" |
| 28 | |
| 29 | /**************************************************************************** |
| 30 | * Defines |
| 31 | ****************************************************************************/ |
| 32 | |
| 33 | #define ETHOSU_DRIVER_VERSION "1.0" |
| 34 | #define ETHOSU_DRIVER_NAME "ethosu" |
| 35 | |
| 36 | /**************************************************************************** |
| 37 | * Variables |
| 38 | ****************************************************************************/ |
| 39 | |
| 40 | struct class *ethosu_class; |
| 41 | |
| 42 | /**************************************************************************** |
| 43 | * Arm Ethos-U |
| 44 | ****************************************************************************/ |
| 45 | |
| 46 | static int ethosu_pdev_probe(struct platform_device *pdev) |
| 47 | { |
| 48 | struct ethosu_device *edev; |
| 49 | struct resource *in_queue_res; |
| 50 | struct resource *out_queue_res; |
| 51 | int ret; |
| 52 | |
| 53 | dev_info(&pdev->dev, "Probe\n"); |
| 54 | |
| 55 | /* Get path to TCM memory */ |
| 56 | in_queue_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
| 57 | "in_queue"); |
| 58 | if (IS_ERR(in_queue_res)) { |
| 59 | dev_err(&pdev->dev, "Failed to get in_queue resource.\n"); |
| 60 | |
| 61 | return PTR_ERR(in_queue_res); |
| 62 | } |
| 63 | |
| 64 | out_queue_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
| 65 | "out_queue"); |
| 66 | if (IS_ERR(out_queue_res)) { |
| 67 | dev_err(&pdev->dev, "Failed to get out_queue resource.\n"); |
| 68 | |
| 69 | return PTR_ERR(out_queue_res); |
| 70 | } |
| 71 | |
| 72 | /* Allocate memory for Arm Ethos-U device */ |
| 73 | edev = devm_kzalloc(&pdev->dev, sizeof(*edev), GFP_KERNEL); |
| 74 | if (!edev) |
| 75 | return -ENOMEM; |
| 76 | |
| 77 | platform_set_drvdata(pdev, edev); |
| 78 | |
| 79 | /* Initialize device */ |
| 80 | ret = ethosu_dev_init(edev, &pdev->dev, ethosu_class, in_queue_res, |
| 81 | out_queue_res); |
| 82 | if (ret) |
| 83 | goto free_dev; |
| 84 | |
| 85 | return 0; |
| 86 | |
| 87 | free_dev: |
| 88 | devm_kfree(&pdev->dev, edev); |
| 89 | |
| 90 | return ret; |
| 91 | } |
| 92 | |
| 93 | static int ethosu_pdev_remove(struct platform_device *pdev) |
| 94 | { |
| 95 | struct ethosu_device *edev = platform_get_drvdata(pdev); |
| 96 | |
| 97 | dev_info(&pdev->dev, "Remove\n"); |
| 98 | |
| 99 | ethosu_dev_deinit(edev); |
| 100 | |
| 101 | return 0; |
| 102 | } |
| 103 | |
| 104 | static const struct of_device_id ethosu_pdev_match[] = { |
| 105 | { .compatible = "arm,ethosu" }, |
| 106 | { /* Sentinel */ }, |
| 107 | }; |
| 108 | |
| 109 | MODULE_DEVICE_TABLE(of, ethosu_pdev_match); |
| 110 | |
| 111 | static struct platform_driver ethosu_pdev_driver = { |
| 112 | .probe = ðosu_pdev_probe, |
| 113 | .remove = ðosu_pdev_remove, |
| 114 | .driver = { |
| 115 | .name = ETHOSU_DRIVER_NAME, |
| 116 | .owner = THIS_MODULE, |
| 117 | .of_match_table = of_match_ptr(ethosu_pdev_match), |
| 118 | }, |
| 119 | }; |
| 120 | |
| 121 | /**************************************************************************** |
| 122 | * Module init and exit |
| 123 | ****************************************************************************/ |
| 124 | |
| 125 | static int __init ethosu_init(void) |
| 126 | { |
| 127 | int ret; |
| 128 | |
| 129 | ethosu_class = class_create(THIS_MODULE, ETHOSU_DRIVER_NAME); |
| 130 | if (IS_ERR(ethosu_class)) { |
| 131 | printk("Failed to create class '%s'.\n", ETHOSU_DRIVER_NAME); |
| 132 | |
| 133 | return PTR_ERR(ethosu_class); |
| 134 | } |
| 135 | |
| 136 | ret = platform_driver_register(ðosu_pdev_driver); |
| 137 | if (ret) { |
| 138 | printk("Failed to register Arm Ethos-U platform driver.\n"); |
| 139 | goto destroy_class; |
| 140 | } |
| 141 | |
| 142 | return 0; |
| 143 | |
| 144 | destroy_class: |
| 145 | class_destroy(ethosu_class); |
| 146 | |
| 147 | return ret; |
| 148 | } |
| 149 | |
| 150 | static void __exit ethosu_exit(void) |
| 151 | { |
| 152 | platform_driver_unregister(ðosu_pdev_driver); |
| 153 | class_destroy(ethosu_class); |
| 154 | } |
| 155 | |
| 156 | module_init(ethosu_init) |
| 157 | module_exit(ethosu_exit) |
| 158 | MODULE_LICENSE("GPL v2"); |
| 159 | MODULE_AUTHOR("Arm Ltd"); |
| 160 | MODULE_DESCRIPTION("Arm Ethos-U NPU Driver"); |
| 161 | MODULE_VERSION(ETHOSU_DRIVER_VERSION); |