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/* $NetBSD: flash.h,v 1.9 2018/04/19 21:50:08 christos Exp $ */
/*-
* Copyright (c) 2011 Department of Software Engineering,
* University of Szeged, Hungary
* Copyright (c) 2011 Adam Hoka <ahoka@NetBSD.org>
* Copyright (c) 2010 David Tengeri <dtengeri@inf.u-szeged.hu>
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by the Department of Software Engineering, University of Szeged, Hungary
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _FLASH_H_
#define _FLASH_H_
#include <sys/param.h>
#include <sys/device.h>
#include <sys/module.h>
#include <sys/buf.h>
#include <sys/flashio.h>
#ifdef FLASH_DEBUG
#define FLDPRINTF(x) if (flashdebug) printf x
#define FLDPRINTFN(n,x) if (flashdebug>(n)) printf x
#else
#define FLDPRINTF(x)
#define FLDPRINTFN(n,x)
#endif
struct flash_partition {
flash_off_t part_offset;
flash_size_t part_size;
int part_flags;
const char *part_name;
};
/**
* flash_softc - private structure for flash layer driver
*/
struct flash_softc {
device_t sc_dev;
device_t sc_parent_dev; /* Hardware (parent) device */
void *hw_softc; /* Hardware device private softc */
struct flash_interface *flash_if; /* Hardware interface */
struct flash_partition sc_partinfo; /* partition information */
bool sc_readonly; /* read only flash device */
};
struct flash_attach_args {
struct flash_interface *flash_if; /* Hardware interface */
struct flash_partition partinfo;
};
/**
* struct erase_instruction - instructions to erase a flash eraseblock
*/
struct flash_erase_instruction {
flash_off_t ei_addr;
flash_off_t ei_len;
void (*ei_callback)(struct flash_erase_instruction *);
u_long ei_priv;
u_char ei_state;
};
enum {
FLASH_PART_READONLY = (1<<0),
FLASH_PART_FILESYSTEM = (1<<2)
};
/**
* struct flash_interface - interface for flash operations
*/
struct flash_interface {
int (*erase)(device_t, struct flash_erase_instruction *);
int (*read)(device_t, flash_off_t, size_t, size_t *, uint8_t *);
int (*write)(device_t, flash_off_t, size_t, size_t *, const uint8_t *);
int (*block_markbad)(device_t, flash_off_t);
int (*block_isbad)(device_t, flash_off_t, bool *);
int (*sync)(device_t);
int (*submit)(device_t, struct buf *);
uint32_t page_size;
uint32_t erasesize;
uint32_t writesize;
uint32_t minor;
uint8_t type;
};
/**
* struct cache - for caching writes on block device
*/
struct flash_cache {
size_t fc_len;
flash_off_t fc_block;
uint8_t *fc_data;
};
device_t flash_attach_mi(struct flash_interface *, device_t);
void flash_attach_mtdparts(struct flash_interface *, device_t, flash_size_t, const char *, const char *);
const struct flash_interface *flash_get_interface(dev_t);
const struct flash_softc *flash_get_softc(dev_t);
device_t flash_get_device(dev_t);
flash_size_t flash_get_size(dev_t);
/* flash operations should be used through these */
int flash_erase(device_t, struct flash_erase_instruction *);
int flash_read(device_t, flash_off_t, size_t, size_t *, uint8_t *);
int flash_write(device_t, flash_off_t, size_t, size_t *, const uint8_t *);
int flash_block_markbad(device_t, flash_off_t);
int flash_block_isbad(device_t, flash_off_t, bool *);
int flash_sync(device_t);
/*
* check_pattern - checks the buffer only contains the byte pattern
*
* This functions checks if the buffer only contains a specified byte pattern.
* Returns %0 if found something else, %1 otherwise.
*/
static __inline int
check_pattern(const void *buf, uint8_t patt, size_t offset, size_t size)
{
size_t i;
for (i = offset; i < size; i++) {
if (((const uint8_t *)buf)[i] != patt)
return 0;
}
return 1;
}
#endif /* _FLASH_H_ */
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