diff options
| author | Alex Smith <alex.smith@imgtec.com> | 2016-01-04 12:34:43 (GMT) |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2016-01-07 17:35:11 (GMT) |
| commit | ae02ab00aa3c282a362af8c4496496970747ddf4 (patch) | |
| tree | 198417846f3950ded59697355ee4dd94f0e365ba /drivers/mtd/nand/jz4780_bch.h | |
| parent | 48bf35de3133996fbac2be16430cd4ea00fa8d38 (diff) | |
| download | linux-ae02ab00aa3c282a362af8c4496496970747ddf4.tar.xz | |
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>
Diffstat (limited to 'drivers/mtd/nand/jz4780_bch.h')
| -rw-r--r-- | drivers/mtd/nand/jz4780_bch.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/mtd/nand/jz4780_bch.h b/drivers/mtd/nand/jz4780_bch.h new file mode 100644 index 0000000..bf471808 --- /dev/null +++ b/drivers/mtd/nand/jz4780_bch.h @@ -0,0 +1,43 @@ +/* + * 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__ */ |