kernel-ark/drivers/mtd/nand/jz4780_bch.h
Alex Smith ae02ab00aa mtd: nand: jz4780: driver for NAND devices on JZ4780 SoCs
Add a driver for NAND devices connected to the NEMC on JZ4780 SoCs, as
well as the hardware BCH controller. DMA is not currently implemented.

While older 47xx SoCs also have a BCH controller, they are incompatible
with the one in the 4780 due to differing register/bit positions, which
would make implementing a common driver for them quite messy.

Signed-off-by: Alex Smith <alex.smith@imgtec.com>
Cc: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: linux-mtd@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
[Brian: fixed a few small mistakes]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2016-01-07 09:35:11 -08:00

44 lines
1.1 KiB
C

/*
* JZ4780 BCH controller
*
* Copyright (c) 2015 Imagination Technologies
* Author: Alex Smith <alex.smith@imgtec.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#ifndef __DRIVERS_MTD_NAND_JZ4780_BCH_H__
#define __DRIVERS_MTD_NAND_JZ4780_BCH_H__
#include <linux/types.h>
struct device;
struct device_node;
struct jz4780_bch;
/**
* struct jz4780_bch_params - BCH parameters
* @size: data bytes per ECC step.
* @bytes: ECC bytes per step.
* @strength: number of correctable bits per ECC step.
*/
struct jz4780_bch_params {
int size;
int bytes;
int strength;
};
int jz4780_bch_calculate(struct jz4780_bch *bch,
struct jz4780_bch_params *params,
const u8 *buf, u8 *ecc_code);
int jz4780_bch_correct(struct jz4780_bch *bch,
struct jz4780_bch_params *params, u8 *buf,
u8 *ecc_code);
void jz4780_bch_release(struct jz4780_bch *bch);
struct jz4780_bch *of_jz4780_bch_get(struct device_node *np);
#endif /* __DRIVERS_MTD_NAND_JZ4780_BCH_H__ */