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a490e1b7c0
Add driver for atmel pmecc. This implementation is ported from Linux. The reference taken is linux-5.4-at91. Signed-off-by: Balamanikandan Gunasundar <balamanikandan.gunasundar@microchip.com>
95 lines
2.5 KiB
C
95 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* © Copyright 2016 ATMEL
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* © Copyright 2016 Free Electrons
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*
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* Author: Boris Brezillon <boris.brezillon@free-electrons.com>
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*
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* Derived from the atmel_nand.c driver which contained the following
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* copyrights:
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*
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* Copyright © 2003 Rick Bronson
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*
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* Derived from drivers/mtd/nand/autcpu12.c (removed in v3.8)
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* Copyright © 2001 Thomas Gleixner (gleixner@autronix.de)
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*
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* Derived from drivers/mtd/spia.c (removed in v3.8)
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* Copyright © 2000 Steven J. Hill (sjhill@cotw.com)
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*
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*
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* Add Hardware ECC support for AT91SAM9260 / AT91SAM9263
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* Richard Genoud (richard.genoud@gmail.com), Adeneo Copyright © 2007
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*
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* Derived from Das U-Boot source code
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* (u-boot-1.1.5/board/atmel/at91sam9263ek/nand.c)
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* © Copyright 2006 ATMEL Rousset, Lacressonniere Nicolas
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*
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* Add Programmable Multibit ECC support for various AT91 SoC
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* © Copyright 2012 ATMEL, Hong Xu
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*
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* Add Nand Flash Controller support for SAMA5 SoC
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* © Copyright 2013 ATMEL, Josh Wu (josh.wu@atmel.com)
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*/
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#ifndef ATMEL_PMECC_H
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#define ATMEL_PMECC_H
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#define ATMEL_PMECC_MAXIMIZE_ECC_STRENGTH 0
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#define ATMEL_PMECC_SECTOR_SIZE_AUTO 0
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#define ATMEL_PMECC_OOBOFFSET_AUTO -1
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struct atmel_pmecc_user_req {
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int pagesize;
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int oobsize;
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struct {
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int strength;
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int bytes;
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int sectorsize;
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int nsectors;
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int ooboffset;
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} ecc;
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};
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struct atmel_pmecc_suspend_ctx {
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u32 setup;
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u32 pulse;
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u32 cycle;
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u32 timings;
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u32 mode;
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};
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struct atmel_pmecc {
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struct udevice *dev;
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const struct atmel_pmecc_caps *caps;
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struct {
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void __iomem *base;
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void __iomem *errloc;
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void __iomem *timing;
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} regs;
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/* Mutex used for pmecc enable/disable */
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struct mutex lock;
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struct atmel_pmecc_suspend_ctx suspend;
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};
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struct atmel_pmecc *devm_atmel_pmecc_get(struct udevice *dev);
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struct atmel_pmecc_user *
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atmel_pmecc_create_user(struct atmel_pmecc *pmecc,
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struct atmel_pmecc_user_req *req);
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void atmel_pmecc_destroy_user(struct atmel_pmecc_user *user);
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void atmel_pmecc_reset(struct atmel_pmecc *pmecc);
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int atmel_pmecc_enable(struct atmel_pmecc_user *user, int op);
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void atmel_pmecc_disable(struct atmel_pmecc_user *user);
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int atmel_pmecc_wait_rdy(struct atmel_pmecc_user *user);
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int atmel_pmecc_correct_sector(struct atmel_pmecc_user *user, int sector,
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void *data, void *ecc);
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bool atmel_pmecc_correct_erased_chunks(struct atmel_pmecc_user *user);
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void atmel_pmecc_get_generated_eccbytes(struct atmel_pmecc_user *user,
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int sector, void *ecc);
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#endif /* ATMEL_PMECC_H */
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