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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/parisc/eisa_eeprom.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/parisc/eisa_eeprom.c')
-rw-r--r--drivers/parisc/eisa_eeprom.c134
1 files changed, 134 insertions, 0 deletions
diff --git a/drivers/parisc/eisa_eeprom.c b/drivers/parisc/eisa_eeprom.c
new file mode 100644
index 000000000000..3a1b4826e5c1
--- /dev/null
+++ b/drivers/parisc/eisa_eeprom.c
@@ -0,0 +1,134 @@
+/*
+ * 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 )
+{
+ switch (origin) {
+ case 0:
+ /* nothing to do */
+ break;
+ case 1:
+ offset += file->f_pos;
+ break;
+ case 2:
+ offset += HPEE_MAX_LENGTH;
+ break;
+ }
+ return (offset >= 0 && offset < HPEE_MAX_LENGTH) ? (file->f_pos = offset) : -EINVAL;
+}
+
+static ssize_t eisa_eeprom_read(struct file * file,
+ char *buf, size_t count, loff_t *ppos )
+{
+ unsigned char *tmp;
+ ssize_t ret;
+ int i;
+
+ if (*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_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd,
+ unsigned long arg)
+{
+ return -ENOTTY;
+}
+
+static int eisa_eeprom_open(struct inode *inode, struct file *file)
+{
+ if (file->f_mode & 2)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int eisa_eeprom_release(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+/*
+ * The various file operations we support.
+ */
+static struct file_operations eisa_eeprom_fops = {
+ .owner = THIS_MODULE,
+ .llseek = eisa_eeprom_llseek,
+ .read = eisa_eeprom_read,
+ .ioctl = eisa_eeprom_ioctl,
+ .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);