MAJOR=4
MINOR=8
DEVNAME=tty8
     -ˆÌÑƒ}öË¿Ï &Ô    -/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
 * Copyright Â© 1999-2010 David Woodhouse <dwmw2@infradead.org> et al.
 *
 * 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
 *
 */

#ifndef __MTD_ABI_H__
#define __MTD_ABI_H__

#include <linux/types.h>

struct erase_info_user {
	__u32 start;
	__u32 length;
};

struct erase_info_user64 {
	__u64 start;
	__u64 length;
};

struct mtd_oob_buf {
	__u32 start;
	__u32 length;
	unsigned char __user *ptr;
};

struct mtd_oob_buf64 {
	__u64 start;
	__u32 pad;
	__u32 length;
	__u64 usr_ptr;
};

/**
 * MTD operation modes
 *
 * @MTD_OPS_PLACE_OOB:	OOB data are placed at the given offset (default)
 * @MTD_OPS_AUTO_OOB:	OOB data are automatically placed at the free areas
 *			which are defined by the internal ecclayout
 * @MTD_OPS_RAW:	data are transferred as-is, with no error correction;
 *			this mode implies %MTD_OPS_PLACE_OOB
 *
 * These modes can be passed to ioctl(MEMWRITE) and are also used internally.
 * See notes on "MTD file modes" for discussion on %MTD_OPS_RAW vs.
 * %MTD_FILE_MODE_RAW.
 */
enum {
	MTD_OPS_PLACE_OOB = 0,
	MTD_OPS_AUTO_OOB = 1,
	MTD_OPS_RAW = 2,
};

/**
 * struct mtd_write_req - data structure for requesting a write operation
 *
 * @start:	start address
 * @len:	length of data buffer
 * @ooblen:	length of OOB buffer
 * @usr_data:	user-provided data buffer
 * @usr_oob:	user-provided OOB buffer
 * @mode:	MTD mode (see "MTD operation modes")
 * @padding:	reserved, must be set to 0
 *
 * This structure supports ioctl(MEMWRITE) operations, allowing data and/or OOB
 * writes in various modes. To write to OOB-only, set @usr_data == NULL, and to
 * write data-only, set @usr_oob == NULL. However, setting both @usr_data and
 * @usr_oob to NULL is not allowed.
 */
struct mtd_write_req {
	__u64 start;
	__u64 len;
	__u64 ooblen;
	__u64 usr_data;
	__u64 usr_oob;
	__u8 mode;
	__u8 padding[7];
};

#define MTD_ABSENT		0
#define MTD_RAM			1
#define MTD_ROM			2
#define MTD_NORFLASH		3
#define MTD_NANDFLASH		4	/* SLC NAND */
#define MTD_DATAFLASH		6
#define MTD_UBIVOLUME		7
#define MTD_MLCNANDFLASH	8	/* MLC NAND (including TLC) */

#define MTD_WRITEABLE		0x400	/* Device is writeable */
#define MTD_BIT_WRITEABLE	0x800	/* Single bits can be flipped */
#define MTD_NO_ERASE		0x1000	/* No erase necessary */
#define MTD_POWERUP_LOCK	0x2000	/* Always locked after reset */
#define MTD_SLC_ON_MLC_EMULATION 0x4000	/* Emulate SLC behavior on MLC NANDs */

/* Some common devices / combinations of capabilities */
#define MTD_CAP_ROM		0
#define MTD_CAP_RAM		(MTD_WRITEABLE | MTD_BIT_WRITEABLE | MTD_NO_ERASE)
#define MTD_CAP_NORFLASH	(MTD_WRITEABLE | MTD_BIT_WRITEABLE)
#define MTD_CAP_NANDFLASH	(MTD_WRITEABLE)
#define MTD_CAP_NVRAM		(MTD_WRITEABLE | MTD_BIT_WRITEABLE | MTD_NO_ERASE)

/* Obsolete ECC byte placement modes (used with obsolete MEMGETOOBSEL) */
#define MTD_NANDECC_OFF		0	/* Switch off ECC (Not recommended) */
#define MTD_NANDECC_PLACE	1	/* Use the given placement in the structure (YAFFS1 legacy mode) */
#define MTD_NANDECC_AUTOPLACE	2	/* Use the default placement scheme */
#define MTD_NANDECC_PLACEONLY	3	/* Use the given placement in the structure (Do not store ecc result on read) */
#define MTD_NANDECC_AUTOPL_USR 	4	/* Use the given autoplacement scheme rather than using the default */

/* OTP mode selection */
#define MTD_OTP_OFF		0
#define MTD_OTP_FACTORY