Update MTD to that of Linux 2.6.22.1
A lot changed in the Linux MTD code, since it was last ported from
Linux to U-Boot. This patch takes U-Boot NAND support to the level
of Linux 2.6.22.1 and will enable support for very large NAND devices
(4KB pages) and ease the compatibility between U-Boot and Linux
filesystems.
This patch is tested on two custom boards with PPC and ARM
processors running YAFFS in U-Boot and Linux using gcc-4.1.2
cross compilers.
MAKEALL ppc/arm has some issues:
* DOC/OneNand/nand_spl is not building (I have not tried porting
these parts, and since I do not have any HW and I am not familiar
with this code/HW I think its best left to someone else.)
Except for the issues mentioned above, I have ported all drivers
necessary to run MAKEALL ppc/arm without errors and warnings. Many
drivers were trivial to port, but some were not so trivial. The
following drivers must be examined carefully and maybe rewritten to
some degree:
cpu/ppc4xx/ndfc.c
cpu/arm926ejs/davinci/nand.c
board/delta/nand.c
board/zylonite/nand.c
Signed-off-by: William Juul <william.juul@tandberg.com>
Signed-off-by: Stig Olsen <stig.olsen@tandberg.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
diff --git a/include/linux/mtd/blktrans.h b/include/linux/mtd/blktrans.h
new file mode 100644
index 0000000..d1ded51
--- /dev/null
+++ b/include/linux/mtd/blktrans.h
@@ -0,0 +1,81 @@
+/*
+ * $Id: blktrans.h,v 1.6 2005/11/07 11:14:54 gleixner Exp $
+ *
+ * (C) 2003 David Woodhouse <dwmw2@infradead.org>
+ *
+ * Interface to Linux block layer for MTD 'translation layers'.
+ *
+ */
+
+#ifndef __MTD_TRANS_H__
+#define __MTD_TRANS_H__
+
+/* XXX U-BOOT XXX */
+#if 0
+#include <linux/mutex.h>
+#else
+#include <linux/list.h>
+#endif
+
+struct hd_geometry;
+struct mtd_info;
+struct mtd_blktrans_ops;
+struct file;
+struct inode;
+
+struct mtd_blktrans_dev {
+ struct mtd_blktrans_ops *tr;
+ struct list_head list;
+ struct mtd_info *mtd;
+/* XXX U-BOOT XXX */
+#if 0
+ struct mutex lock;
+#endif
+ int devnum;
+ unsigned long size;
+ int readonly;
+ void *blkcore_priv; /* gendisk in 2.5, devfs_handle in 2.4 */
+};
+
+struct blkcore_priv; /* Differs for 2.4 and 2.5 kernels; private */
+
+struct mtd_blktrans_ops {
+ char *name;
+ int major;
+ int part_bits;
+ int blksize;
+ int blkshift;
+
+ /* Access functions */
+ int (*readsect)(struct mtd_blktrans_dev *dev,
+ unsigned long block, char *buffer);
+ int (*writesect)(struct mtd_blktrans_dev *dev,
+ unsigned long block, char *buffer);
+
+ /* Block layer ioctls */
+ int (*getgeo)(struct mtd_blktrans_dev *dev, struct hd_geometry *geo);
+ int (*flush)(struct mtd_blktrans_dev *dev);
+
+ /* Called with mtd_table_mutex held; no race with add/remove */
+ int (*open)(struct mtd_blktrans_dev *dev);
+ int (*release)(struct mtd_blktrans_dev *dev);
+
+ /* Called on {de,}registration and on subsequent addition/removal
+ of devices, with mtd_table_mutex held. */
+ void (*add_mtd)(struct mtd_blktrans_ops *tr, struct mtd_info *mtd);
+ void (*remove_dev)(struct mtd_blktrans_dev *dev);
+
+ struct list_head devs;
+ struct list_head list;
+ struct module *owner;
+
+ struct mtd_blkcore_priv *blkcore_priv;
+};
+
+extern int register_mtd_blktrans(struct mtd_blktrans_ops *tr);
+extern int deregister_mtd_blktrans(struct mtd_blktrans_ops *tr);
+extern int add_mtd_blktrans_dev(struct mtd_blktrans_dev *dev);
+extern int del_mtd_blktrans_dev(struct mtd_blktrans_dev *dev);
+
+
+#endif /* __MTD_TRANS_H__ */