143b0ab97d
During backup mode, the contents of all registers will be cleared as the SoC will be completely powered down. For a product that boots on NAND Flash memory, the bootloader will obviously use the related controller to read the Flash and correct any detected error in the memory, before handling back control to the kernel's resuming entry point. But it does not clean the NAND controller registers after use and on its side the kernel driver expects the error locator to be powered down and in a clean state. Add a resume hook for the PMECC error locator, and reset its registers. Signed-off-by: Romain Izard <romain.izard.pro@gmail.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
/*
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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
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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
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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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 *devm_atmel_pmecc_get(struct device *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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