/*
- * $Id: mtdchar.c,v 1.70 2005/04/01 15:36:11 nico Exp $
+ * $Id: mtdchar.c,v 1.74 2005/08/04 01:05:48 tpoynor Exp $
*
* Character-device access to raw MTD devices.
*
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/fs.h>
+#include <linux/sched.h> /* TASK_* */
#include <asm/uaccess.h>
-#ifdef CONFIG_DEVFS_FS
-#include <linux/devfs_fs_kernel.h>
+#include <linux/device.h>
+
+static struct class *mtd_class;
static void mtd_notify_add(struct mtd_info* mtd)
{
if (!mtd)
return;
- devfs_mk_cdev(MKDEV(MTD_CHAR_MAJOR, mtd->index*2),
- S_IFCHR | S_IRUGO | S_IWUGO, "mtd/%d", mtd->index);
-
- devfs_mk_cdev(MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1),
- S_IFCHR | S_IRUGO, "mtd/%dro", mtd->index);
+ class_device_create(mtd_class, NULL, MKDEV(MTD_CHAR_MAJOR, mtd->index*2),
+ NULL, "mtd%d", mtd->index);
+
+ class_device_create(mtd_class, NULL,
+ MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1),
+ NULL, "mtd%dro", mtd->index);
}
static void mtd_notify_remove(struct mtd_info* mtd)
{
if (!mtd)
return;
- devfs_remove("mtd/%d", mtd->index);
- devfs_remove("mtd/%dro", mtd->index);
+
+ class_device_destroy(mtd_class, MKDEV(MTD_CHAR_MAJOR, mtd->index*2));
+ class_device_destroy(mtd_class, MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1));
}
static struct mtd_notifier notifier = {
.remove = mtd_notify_remove,
};
-static inline void mtdchar_devfs_init(void)
-{
- devfs_mk_dir("mtd");
- register_mtd_user(¬ifier);
-}
-
-static inline void mtdchar_devfs_exit(void)
-{
- unregister_mtd_user(¬ifier);
- devfs_remove("mtd");
-}
-#else /* !DEVFS */
-#define mtdchar_devfs_init() do { } while(0)
-#define mtdchar_devfs_exit() do { } while(0)
-#endif
-
/*
* We use file->private_data to store a pointer to the MTDdevice.
* Since alighment is at least 32 bits, we have 2 bits free for OTP
switch (orig) {
case 0:
/* SEEK_SET */
- file->f_pos = offset;
break;
case 1:
/* SEEK_CUR */
- file->f_pos += offset;
+ offset += file->f_pos;
break;
case 2:
/* SEEK_END */
- file->f_pos =mtd->size + offset;
+ offset += mtd->size;
break;
default:
return -EINVAL;
}
- if (file->f_pos < 0)
- file->f_pos = 0;
- else if (file->f_pos >= mtd->size)
- file->f_pos = mtd->size - 1;
+ if (offset >= 0 && offset < mtd->size)
+ return file->f_pos = offset;
- return file->f_pos;
+ return -EINVAL;
}
return -EAGAIN;
}
- mtdchar_devfs_init();
+ mtd_class = class_create(THIS_MODULE, "mtd");
+
+ if (IS_ERR(mtd_class)) {
+ printk(KERN_ERR "Error creating mtd class.\n");
+ unregister_chrdev(MTD_CHAR_MAJOR, "mtd");
+ return PTR_ERR(mtd_class);
+ }
+
+ register_mtd_user(¬ifier);
return 0;
}
static void __exit cleanup_mtdchar(void)
{
- mtdchar_devfs_exit();
+ unregister_mtd_user(¬ifier);
+ class_destroy(mtd_class);
unregister_chrdev(MTD_CHAR_MAJOR, "mtd");
}