Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 1 | /* |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 2 | * Copyright 2020-2023 Arm Limited and/or its affiliates |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 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 | |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 21 | #include <linux/bitmap.h> |
| 22 | #include <linux/fs.h> |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 23 | #include <linux/module.h> |
| 24 | #include <linux/io.h> |
| 25 | #include <linux/of.h> |
| 26 | #include <linux/of_address.h> |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 27 | #include <linux/rpmsg.h> |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 28 | |
| 29 | #include "ethosu_device.h" |
| 30 | |
| 31 | /**************************************************************************** |
| 32 | * Defines |
| 33 | ****************************************************************************/ |
| 34 | |
| 35 | #define ETHOSU_DRIVER_VERSION "1.0" |
| 36 | #define ETHOSU_DRIVER_NAME "ethosu" |
| 37 | |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 38 | #define MINOR_BASE 0 /* Minor version starts at 0 */ |
| 39 | #define MINOR_COUNT 64 /* Allocate minor versions */ |
| 40 | |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 41 | #define DMA_ADDR_BITS 32 /* Number of address bits */ |
| 42 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 43 | /**************************************************************************** |
| 44 | * Variables |
| 45 | ****************************************************************************/ |
| 46 | |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 47 | static struct class *ethosu_class; |
| 48 | |
| 49 | static dev_t devt; |
| 50 | |
| 51 | static DECLARE_BITMAP(minors, MINOR_COUNT); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 52 | |
| 53 | /**************************************************************************** |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 54 | * Rpmsg driver |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 55 | ****************************************************************************/ |
| 56 | |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 57 | static int ethosu_rpmsg_probe(struct rpmsg_device *rpdev) |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 58 | { |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 59 | struct device *dev = &rpdev->dev; |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 60 | int minor; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 61 | int ret; |
| 62 | |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 63 | /* Reserve minor number for device node */ |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 64 | minor = find_first_zero_bit(minors, MINOR_COUNT); |
| 65 | if (minor >= MINOR_COUNT) { |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 66 | dev_err(dev, "No more minor numbers."); |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 67 | |
| 68 | return -ENOMEM; |
| 69 | } |
| 70 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 71 | /* Initialize device */ |
Kristofer Jonsson | ec47704 | 2023-01-20 13:38:13 +0100 | [diff] [blame^] | 72 | ret = ethosu_dev_init(rpdev, ethosu_class, MKDEV(MAJOR(devt), minor)); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 73 | if (ret) |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 74 | return ret; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 75 | |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 76 | set_bit(minor, minors); |
| 77 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 78 | return 0; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 79 | } |
| 80 | |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 81 | static void ethosu_rpmsg_remove(struct rpmsg_device *rpdev) |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 82 | { |
Kristofer Jonsson | ec47704 | 2023-01-20 13:38:13 +0100 | [diff] [blame^] | 83 | struct device *dev = &rpdev->dev; |
| 84 | struct ethosu_device *edev = dev_get_drvdata(dev); |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 85 | |
Kristofer Jonsson | ec47704 | 2023-01-20 13:38:13 +0100 | [diff] [blame^] | 86 | dev_info(dev, "%s", __FUNCTION__); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 87 | |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 88 | clear_bit(MINOR(edev->devt), minors); |
Kristofer Jonsson | ec47704 | 2023-01-20 13:38:13 +0100 | [diff] [blame^] | 89 | ethosu_dev_deinit(rpdev); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 90 | } |
| 91 | |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 92 | static int ethosu_rpmsg_cb(struct rpmsg_device *rpdev, |
| 93 | void *data, |
| 94 | int len, |
| 95 | void *priv, |
| 96 | u32 src) |
| 97 | { |
| 98 | dev_err(&rpdev->dev, "%s", __FUNCTION__); |
| 99 | |
| 100 | return -EINVAL; |
| 101 | } |
| 102 | |
| 103 | static struct rpmsg_device_id ethosu_rpmsg_driver_id_table[] = { |
| 104 | { .name = "ethos-u-0.0" }, |
| 105 | {}, |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 106 | }; |
| 107 | |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 108 | MODULE_DEVICE_TABLE(rpmsg, ethosu_rpmsg_driver_id_table); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 109 | |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 110 | static struct rpmsg_driver ethosu_rpmsg_driver = { |
| 111 | .drv = { |
| 112 | .name = ETHOSU_DRIVER_NAME, |
| 113 | .owner = THIS_MODULE, |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 114 | }, |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 115 | .id_table = ethosu_rpmsg_driver_id_table, |
| 116 | .probe = ethosu_rpmsg_probe, |
| 117 | .callback = ethosu_rpmsg_cb, |
| 118 | .remove = ethosu_rpmsg_remove, |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 119 | }; |
| 120 | |
| 121 | /**************************************************************************** |
| 122 | * Module init and exit |
| 123 | ****************************************************************************/ |
| 124 | |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 125 | static void __exit ethosu_exit(void) |
| 126 | { |
| 127 | unregister_rpmsg_driver(ðosu_rpmsg_driver); |
| 128 | unregister_chrdev_region(devt, MINOR_COUNT); |
| 129 | class_destroy(ethosu_class); |
| 130 | } |
| 131 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 132 | static int __init ethosu_init(void) |
| 133 | { |
| 134 | int ret; |
| 135 | |
| 136 | ethosu_class = class_create(THIS_MODULE, ETHOSU_DRIVER_NAME); |
| 137 | if (IS_ERR(ethosu_class)) { |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 138 | pr_err("Failed to create class '%s'.\n", ETHOSU_DRIVER_NAME); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 139 | |
| 140 | return PTR_ERR(ethosu_class); |
| 141 | } |
| 142 | |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 143 | ret = alloc_chrdev_region(&devt, MINOR_BASE, MINOR_COUNT, |
| 144 | ETHOSU_DRIVER_NAME); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 145 | if (ret) { |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 146 | pr_err("Failed to allocate chrdev region.\n"); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 147 | goto destroy_class; |
| 148 | } |
| 149 | |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 150 | ret = register_rpmsg_driver(ðosu_rpmsg_driver); |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 151 | if (ret) { |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 152 | pr_err("Failed to register Arm Ethos-U rpmsg driver.\n"); |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 153 | goto region_unregister; |
| 154 | } |
| 155 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 156 | return 0; |
| 157 | |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 158 | region_unregister: |
| 159 | unregister_chrdev_region(devt, MINOR_COUNT); |
| 160 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 161 | destroy_class: |
| 162 | class_destroy(ethosu_class); |
| 163 | |
| 164 | return ret; |
| 165 | } |
| 166 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 167 | module_init(ethosu_init) |
| 168 | module_exit(ethosu_exit) |
Kristofer Jonsson | d779a08 | 2023-01-04 17:09:47 +0100 | [diff] [blame] | 169 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 170 | MODULE_LICENSE("GPL v2"); |
| 171 | MODULE_AUTHOR("Arm Ltd"); |
| 172 | MODULE_DESCRIPTION("Arm Ethos-U NPU Driver"); |
| 173 | MODULE_VERSION(ETHOSU_DRIVER_VERSION); |