Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / parisc / eisa_eeprom.c

diff --git a/kernel/drivers/parisc/eisa_eeprom.c b/kernel/drivers/parisc/eisa_eeprom.c
new file mode 100644 (file)
index 0000000..783906f
--- /dev/null
+++ b/kernel/drivers/parisc/eisa_eeprom.c
@@ -0,0 +1,115 @@
+/* 
+ *    EISA "eeprom" support routines
+ *
+ *    Copyright (C) 2001 Thomas Bogendoerfer <tsbogend at parisc-linux.org>
+ *
+ *
+ *    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
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/eisa_eeprom.h>
+
+#define        EISA_EEPROM_MINOR 241
+
+static loff_t eisa_eeprom_llseek(struct file *file, loff_t offset, int origin)
+{
+       return fixed_size_llseek(file, offset, origin, HPEE_MAX_LENGTH);
+}
+
+static ssize_t eisa_eeprom_read(struct file * file,
+                             char __user *buf, size_t count, loff_t *ppos )
+{
+       unsigned char *tmp;
+       ssize_t ret;
+       int i;
+       
+       if (*ppos < 0 || *ppos >= HPEE_MAX_LENGTH)
+               return 0;
+       
+       count = *ppos + count < HPEE_MAX_LENGTH ? count : HPEE_MAX_LENGTH - *ppos;
+       tmp = kmalloc(count, GFP_KERNEL);
+       if (tmp) {
+               for (i = 0; i < count; i++)
+                       tmp[i] = readb(eisa_eeprom_addr+(*ppos)++);
+
+               if (copy_to_user (buf, tmp, count))
+                       ret = -EFAULT;
+               else
+                       ret = count;
+               kfree (tmp);
+       } else
+               ret = -ENOMEM;
+       
+       return ret;
+}
+
+static int eisa_eeprom_open(struct inode *inode, struct file *file)
+{
+       if (file->f_mode & FMODE_WRITE)
+               return -EINVAL;
+   
+       return 0;
+}
+
+static int eisa_eeprom_release(struct inode *inode, struct file *file)
+{
+       return 0;
+}
+
+/*
+ *     The various file operations we support.
+ */
+static const struct file_operations eisa_eeprom_fops = {
+       .owner =        THIS_MODULE,
+       .llseek =       eisa_eeprom_llseek,
+       .read =         eisa_eeprom_read,
+       .open =         eisa_eeprom_open,
+       .release =      eisa_eeprom_release,
+};
+
+static struct miscdevice eisa_eeprom_dev = {
+       EISA_EEPROM_MINOR,
+       "eisa_eeprom",
+       &eisa_eeprom_fops
+};
+
+static int __init eisa_eeprom_init(void)
+{
+       int retval;
+
+       if (!eisa_eeprom_addr)
+               return -ENODEV;
+
+       retval = misc_register(&eisa_eeprom_dev);
+       if (retval < 0) {
+               printk(KERN_ERR "EISA EEPROM: cannot register misc device.\n");
+               return retval;
+       }
+
+       printk(KERN_INFO "EISA EEPROM at 0x%p\n", eisa_eeprom_addr);
+       return 0;
+}
+
+MODULE_LICENSE("GPL");
+
+module_init(eisa_eeprom_init);