^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * Copyright(c) 2015, 2016 Intel Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * This file is provided under a dual BSD/GPLv2 license. When using or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * redistributing this file, you may do so under either license.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * GPL LICENSE SUMMARY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * This program is free software; you can redistribute it and/or modify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * it under the terms of version 2 of the GNU General Public License as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * published by the Free Software Foundation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * This program is distributed in the hope that it will be useful, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * WITHOUT ANY WARRANTY; without even the implied warranty of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * General Public License for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * BSD LICENSE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * Redistribution and use in source and binary forms, with or without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * modification, are permitted provided that the following conditions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * are met:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * - Redistributions of source code must retain the above copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * notice, this list of conditions and the following disclaimer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * - Redistributions in binary form must reproduce the above copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * notice, this list of conditions and the following disclaimer in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * the documentation and/or other materials provided with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * distribution.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * - Neither the name of Intel Corporation nor the names of its
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * contributors may be used to endorse or promote products derived
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * from this software without specific prior written permission.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #include <linux/cdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #include "hfi.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #include "device.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static struct class *class;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) static struct class *user_class;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static dev_t hfi1_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) int hfi1_cdev_init(int minor, const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) const struct file_operations *fops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct cdev *cdev, struct device **devp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) bool user_accessible,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct kobject *parent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) const dev_t dev = MKDEV(MAJOR(hfi1_dev), minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct device *device = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) cdev_init(cdev, fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) cdev->owner = THIS_MODULE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) cdev_set_parent(cdev, parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) kobject_set_name(&cdev->kobj, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) ret = cdev_add(cdev, dev, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) pr_err("Could not add cdev for minor %d, %s (err %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) minor, name, -ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) if (user_accessible)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) device = device_create(user_class, NULL, dev, NULL, "%s", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) device = device_create(class, NULL, dev, NULL, "%s", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (IS_ERR(device)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) ret = PTR_ERR(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) device = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) pr_err("Could not create device for minor %d, %s (err %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) minor, name, -ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) cdev_del(cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) *devp = device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) void hfi1_cdev_cleanup(struct cdev *cdev, struct device **devp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct device *device = *devp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) if (device) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) device_unregister(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) *devp = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) cdev_del(cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static const char *hfi1_class_name = "hfi1";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) const char *class_name(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return hfi1_class_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static char *hfi1_devnode(struct device *dev, umode_t *mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) *mode = 0600;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return kasprintf(GFP_KERNEL, "%s", dev_name(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) static const char *hfi1_class_name_user = "hfi1_user";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) static const char *class_name_user(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return hfi1_class_name_user;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) static char *hfi1_user_devnode(struct device *dev, umode_t *mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) *mode = 0666;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return kasprintf(GFP_KERNEL, "%s", dev_name(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) int __init dev_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) ret = alloc_chrdev_region(&hfi1_dev, 0, HFI1_NMINORS, DRIVER_NAME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) pr_err("Could not allocate chrdev region (err %d)\n", -ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) class = class_create(THIS_MODULE, class_name());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (IS_ERR(class)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) ret = PTR_ERR(class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) pr_err("Could not create device class (err %d)\n", -ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) unregister_chrdev_region(hfi1_dev, HFI1_NMINORS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) class->devnode = hfi1_devnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) user_class = class_create(THIS_MODULE, class_name_user());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (IS_ERR(user_class)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) ret = PTR_ERR(user_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) pr_err("Could not create device class for user accessible files (err %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) -ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) class_destroy(class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) class = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) user_class = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) unregister_chrdev_region(hfi1_dev, HFI1_NMINORS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) user_class->devnode = hfi1_user_devnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) void dev_cleanup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) class_destroy(class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) class = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) class_destroy(user_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) user_class = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) unregister_chrdev_region(hfi1_dev, HFI1_NMINORS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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