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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version 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 write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
101 lines
2 KiB
C
101 lines
2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* EISA "eeprom" support routines
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*
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* Copyright (C) 2001 Thomas Bogendoerfer <tsbogend at parisc-linux.org>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/miscdevice.h>
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#include <linux/slab.h>
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#include <linux/fs.h>
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#include <asm/io.h>
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#include <linux/uaccess.h>
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#include <asm/eisa_eeprom.h>
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#define EISA_EEPROM_MINOR 241
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static loff_t eisa_eeprom_llseek(struct file *file, loff_t offset, int origin)
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{
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return fixed_size_llseek(file, offset, origin, HPEE_MAX_LENGTH);
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}
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static ssize_t eisa_eeprom_read(struct file * file,
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char __user *buf, size_t count, loff_t *ppos )
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{
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unsigned char *tmp;
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ssize_t ret;
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int i;
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if (*ppos < 0 || *ppos >= HPEE_MAX_LENGTH)
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return 0;
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count = *ppos + count < HPEE_MAX_LENGTH ? count : HPEE_MAX_LENGTH - *ppos;
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tmp = kmalloc(count, GFP_KERNEL);
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if (tmp) {
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for (i = 0; i < count; i++)
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tmp[i] = readb(eisa_eeprom_addr+(*ppos)++);
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if (copy_to_user (buf, tmp, count))
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ret = -EFAULT;
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else
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ret = count;
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kfree (tmp);
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} else
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ret = -ENOMEM;
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return ret;
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}
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static int eisa_eeprom_open(struct inode *inode, struct file *file)
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{
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if (file->f_mode & FMODE_WRITE)
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return -EINVAL;
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return 0;
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}
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static int eisa_eeprom_release(struct inode *inode, struct file *file)
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{
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return 0;
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}
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/*
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* The various file operations we support.
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*/
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static const struct file_operations eisa_eeprom_fops = {
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.owner = THIS_MODULE,
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.llseek = eisa_eeprom_llseek,
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.read = eisa_eeprom_read,
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.open = eisa_eeprom_open,
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.release = eisa_eeprom_release,
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};
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static struct miscdevice eisa_eeprom_dev = {
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EISA_EEPROM_MINOR,
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"eisa_eeprom",
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&eisa_eeprom_fops
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};
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static int __init eisa_eeprom_init(void)
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{
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int retval;
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if (!eisa_eeprom_addr)
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return -ENODEV;
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retval = misc_register(&eisa_eeprom_dev);
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if (retval < 0) {
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printk(KERN_ERR "EISA EEPROM: cannot register misc device.\n");
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return retval;
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}
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printk(KERN_INFO "EISA EEPROM at 0x%px\n", eisa_eeprom_addr);
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return 0;
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}
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MODULE_LICENSE("GPL");
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module_init(eisa_eeprom_init);
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