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path: root/drivers/mtd/mtdchar.c
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Diffstat (limited to 'drivers/mtd/mtdchar.c')
-rw-r--r--drivers/mtd/mtdchar.c59
1 files changed, 56 insertions, 3 deletions
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 91c8013cf0d9..a825002123c8 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -1,5 +1,19 @@
/*
- * Character-device access to raw MTD devices.
+ * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
@@ -18,7 +32,7 @@
#include <linux/mount.h>
#include <linux/mtd/mtd.h>
-#include <linux/mtd/compatmac.h>
+#include <linux/mtd/map.h>
#include <asm/uaccess.h>
@@ -675,6 +689,20 @@ static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
break;
}
+ case MEMISLOCKED:
+ {
+ struct erase_info_user einfo;
+
+ if (copy_from_user(&einfo, argp, sizeof(einfo)))
+ return -EFAULT;
+
+ if (!mtd->is_locked)
+ ret = -EOPNOTSUPP;
+ else
+ ret = mtd->is_locked(mtd, einfo.start, einfo.length);
+ break;
+ }
+
/* Legacy interface */
case MEMGETOOBSEL:
{
@@ -950,9 +978,34 @@ static int mtd_mmap(struct file *file, struct vm_area_struct *vma)
#ifdef CONFIG_MMU
struct mtd_file_info *mfi = file->private_data;
struct mtd_info *mtd = mfi->mtd;
+ struct map_info *map = mtd->priv;
+ unsigned long start;
+ unsigned long off;
+ u32 len;
+
+ if (mtd->type == MTD_RAM || mtd->type == MTD_ROM) {
+ off = vma->vm_pgoff << PAGE_SHIFT;
+ start = map->phys;
+ len = PAGE_ALIGN((start & ~PAGE_MASK) + map->size);
+ start &= PAGE_MASK;
+ if ((vma->vm_end - vma->vm_start + off) > len)
+ return -EINVAL;
+
+ off += start;
+ vma->vm_pgoff = off >> PAGE_SHIFT;
+ vma->vm_flags |= VM_IO | VM_RESERVED;
+
+#ifdef pgprot_noncached
+ if (file->f_flags & O_DSYNC || off >= __pa(high_memory))
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+#endif
+ if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
+ vma->vm_end - vma->vm_start,
+ vma->vm_page_prot))
+ return -EAGAIN;
- if (mtd->type == MTD_RAM || mtd->type == MTD_ROM)
return 0;
+ }
return -ENOSYS;
#else
return vma->vm_flags & VM_SHARED ? 0 : -ENOSYS;