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Merge tag 'for-linus-20130301' of git://git.infradead.org/linux-mtd

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Pull MTD update from David Woodhouse:
 "Fairly unexciting MTD merge for 3.9:

   - misc clean-ups in the MTD command-line partitioning parser
     (cmdlinepart)
   - add flash locking support for STmicro chips serial flash chips, as
     well as for CFI command set 2 chips.
   - new driver for the ELM error correction HW module found in various
     TI chips, enable the OMAP NAND driver to use the ELM HW error
     correction
   - added number of new serial flash IDs
   - various fixes and improvements in the gpmi NAND driver
   - bcm47xx NAND driver improvements
   - make the mtdpart module actually removable"

* tag 'for-linus-20130301' of git://git.infradead.org/linux-mtd: (45 commits)
  mtd: map: BUG() in non handled cases
  mtd: bcm47xxnflash: use pr_fmt for module prefix in messages
  mtd: davinci_nand: Use managed resources
  mtd: mtd_torturetest can cause stack overflows
  mtd: physmap_of: Convert device allocation to managed devm_kzalloc()
  mtd: at91: atmel_nand: for PMECC, add code to check the ONFI parameter ECC requirement.
  mtd: atmel_nand: make pmecc-cap, pmecc-sector-size in dts is optional.
  mtd: atmel_nand: avoid to report an error when lookup table offset is 0.
  mtd: bcm47xxsflash: adjust names of bus-specific functions
  mtd: bcm47xxpart: improve probing of nvram partition
  mtd: bcm47xxpart: add support for other erase sizes
  mtd: bcm47xxnflash: register this as normal driver
  mtd: bcm47xxnflash: fix message
  mtd: bcm47xxsflash: register this as normal driver
  mtd: bcm47xxsflash: write number of written bytes
  mtd: gpmi: add sanity check for the ECC
  mtd: gpmi: set the Golois Field bit for mx6q's BCH
  mtd: devices: elm: Removes <xx> literals in elm DT node
  mtd: gpmi: fix a dereferencing freed memory error
  mtd: fix the wrong timeo for panic_nand_wait()
  ...
This commit is contained in:
Linus Torvalds
2013-03-02 16:33:54 -08:00
parent 37cae6ad4c 24dea0c9fe
commit 48476df998
38 changed files with 1882 additions and 332 deletions
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54
include/linux/platform_data/elm.h Normal file
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/*
* BCH Error Location Module
*
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef __ELM_H
#define __ELM_H
enum bch_ecc {
BCH4_ECC = 0,
BCH8_ECC,
};
/* ELM support 8 error syndrome process */
#define ERROR_VECTOR_MAX 8
#define BCH8_ECC_OOB_BYTES 13
#define BCH4_ECC_OOB_BYTES 7
/* RBL requires 14 byte even though BCH8 uses only 13 byte */
#define BCH8_SIZE (BCH8_ECC_OOB_BYTES + 1)
/* Uses 1 extra byte to handle erased pages */
#define BCH4_SIZE (BCH4_ECC_OOB_BYTES + 1)
/**
* struct elm_errorvec - error vector for elm
* @error_reported: set true for vectors error is reported
* @error_uncorrectable: number of uncorrectable errors
* @error_count: number of correctable errors in the sector
* @error_loc: buffer for error location
*
*/
struct elm_errorvec {
bool error_reported;
bool error_uncorrectable;
int error_count;
int error_loc[ERROR_VECTOR_MAX];
};
void elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc,
struct elm_errorvec *err_vec);
void elm_config(struct device *dev, enum bch_ecc bch_type);
#endif /* __ELM_H */