// SPDX-License-Identifier: GPL-2.0 /* * Copyright 2017 ATMEL * Copyright 2017 Free Electrons * * Author: Boris Brezillon <[email protected]> * * Derived from the atmel_nand.c driver which contained the following * copyrights: * * Copyright 2003 Rick Bronson * * Derived from drivers/mtd/nand/autcpu12.c (removed in v3.8) * Copyright 2001 Thomas Gleixner ([email protected]) * * Derived from drivers/mtd/spia.c (removed in v3.8) * Copyright 2000 Steven J. Hill ([email protected]) * * Add Hardware ECC support for AT91SAM9260 / AT91SAM9263 * Richard Genoud ([email protected]), Adeneo Copyright 2007 * * Derived from Das U-Boot source code * (u-boot-1.1.5/board/atmel/at91sam9263ek/nand.c) * Copyright 2006 ATMEL Rousset, Lacressonniere Nicolas * * Add Programmable Multibit ECC support for various AT91 SoC * Copyright 2012 ATMEL, Hong Xu * * Add Nand Flash Controller support for SAMA5 SoC * Copyright 2013 ATMEL, Josh Wu ([email protected]) * * The PMECC is an hardware assisted BCH engine, which means part of the * ECC algorithm is left to the software. The hardware/software repartition * is explained in the "PMECC Controller Functional Description" chapter in * Atmel datasheets, and some of the functions in this file are directly * implementing the algorithms described in the "Software Implementation" * sub-section. * * TODO: it seems that the software BCH implementation in lib/bch.c is already * providing some of the logic we are implementing here. It would be smart * to expose the needed lib/bch.c helpers/functions and re-use them here. */ #include <linux/genalloc.h> #include <linux/iopoll.h> #include <linux/module.h> #include <linux/mtd/rawnand.h> #include <linux/of_irq.h> #include <linux/of_platform.h> #include <linux/platform_device.h> #include <linux/slab.h> #include "pmecc.h" /* Galois field dimension */ #define PMECC_GF_DIMENSION_13 … #define PMECC_GF_DIMENSION_14 … /* Primitive Polynomial used by PMECC */ #define PMECC_GF_13_PRIMITIVE_POLY … #define PMECC_GF_14_PRIMITIVE_POLY … #define PMECC_LOOKUP_TABLE_SIZE_512 … #define PMECC_LOOKUP_TABLE_SIZE_1024 … /* Time out value for reading PMECC status register */ #define PMECC_MAX_TIMEOUT_MS … /* PMECC Register Definitions */ #define ATMEL_PMECC_CFG … #define PMECC_CFG_BCH_STRENGTH(x) … #define PMECC_CFG_BCH_STRENGTH_MASK … #define PMECC_CFG_SECTOR512 … #define PMECC_CFG_SECTOR1024 … #define PMECC_CFG_NSECTORS(x) … #define PMECC_CFG_READ_OP … #define PMECC_CFG_WRITE_OP … #define PMECC_CFG_SPARE_ENABLE … #define PMECC_CFG_AUTO_ENABLE … #define ATMEL_PMECC_SAREA … #define ATMEL_PMECC_SADDR … #define ATMEL_PMECC_EADDR … #define ATMEL_PMECC_CLK … #define PMECC_CLK_133MHZ … #define ATMEL_PMECC_CTRL … #define PMECC_CTRL_RST … #define PMECC_CTRL_DATA … #define PMECC_CTRL_USER … #define PMECC_CTRL_ENABLE … #define PMECC_CTRL_DISABLE … #define ATMEL_PMECC_SR … #define PMECC_SR_BUSY … #define PMECC_SR_ENABLE … #define ATMEL_PMECC_IER … #define ATMEL_PMECC_IDR … #define ATMEL_PMECC_IMR … #define ATMEL_PMECC_ISR … #define PMECC_ERROR_INT … #define ATMEL_PMECC_ECC(sector, n) … #define ATMEL_PMECC_REM(sector, n) … /* PMERRLOC Register Definitions */ #define ATMEL_PMERRLOC_ELCFG … #define PMERRLOC_ELCFG_SECTOR_512 … #define PMERRLOC_ELCFG_SECTOR_1024 … #define PMERRLOC_ELCFG_NUM_ERRORS(n) … #define ATMEL_PMERRLOC_ELPRIM … #define ATMEL_PMERRLOC_ELEN … #define ATMEL_PMERRLOC_ELDIS … #define PMERRLOC_DISABLE … #define ATMEL_PMERRLOC_ELSR … #define PMERRLOC_ELSR_BUSY … #define ATMEL_PMERRLOC_ELIER … #define ATMEL_PMERRLOC_ELIDR … #define ATMEL_PMERRLOC_ELIMR … #define ATMEL_PMERRLOC_ELISR … #define PMERRLOC_ERR_NUM_MASK … #define PMERRLOC_CALC_DONE … #define ATMEL_PMERRLOC_SIGMA(x) … #define ATMEL_PMERRLOC_EL(offs, x) … struct atmel_pmecc_gf_tables { … }; struct atmel_pmecc_caps { … }; struct atmel_pmecc { … }; struct atmel_pmecc_user_conf_cache { … }; struct atmel_pmecc_user { … }; static DEFINE_MUTEX(pmecc_gf_tables_lock); static const struct atmel_pmecc_gf_tables *pmecc_gf_tables_512; static const struct atmel_pmecc_gf_tables *pmecc_gf_tables_1024; static inline int deg(unsigned int poly) { … } static int atmel_pmecc_build_gf_tables(int mm, unsigned int poly, struct atmel_pmecc_gf_tables *gf_tables) { … } static const struct atmel_pmecc_gf_tables * atmel_pmecc_create_gf_tables(const struct atmel_pmecc_user_req *req) { … } static const struct atmel_pmecc_gf_tables * atmel_pmecc_get_gf_tables(const struct atmel_pmecc_user_req *req) { … } static int atmel_pmecc_prepare_user_req(struct atmel_pmecc *pmecc, struct atmel_pmecc_user_req *req) { … } struct atmel_pmecc_user * atmel_pmecc_create_user(struct atmel_pmecc *pmecc, struct atmel_pmecc_user_req *req) { … } EXPORT_SYMBOL_GPL(…); void atmel_pmecc_destroy_user(struct atmel_pmecc_user *user) { … } EXPORT_SYMBOL_GPL(…); static int get_strength(struct atmel_pmecc_user *user) { … } static int get_sectorsize(struct atmel_pmecc_user *user) { … } static void atmel_pmecc_gen_syndrome(struct atmel_pmecc_user *user, int sector) { … } static void atmel_pmecc_substitute(struct atmel_pmecc_user *user) { … } static void atmel_pmecc_get_sigma(struct atmel_pmecc_user *user) { … } static int atmel_pmecc_err_location(struct atmel_pmecc_user *user) { … } int atmel_pmecc_correct_sector(struct atmel_pmecc_user *user, int sector, void *data, void *ecc) { … } EXPORT_SYMBOL_GPL(…); bool atmel_pmecc_correct_erased_chunks(struct atmel_pmecc_user *user) { … } EXPORT_SYMBOL_GPL(…); void atmel_pmecc_get_generated_eccbytes(struct atmel_pmecc_user *user, int sector, void *ecc) { … } EXPORT_SYMBOL_GPL(…); void atmel_pmecc_reset(struct atmel_pmecc *pmecc) { … } EXPORT_SYMBOL_GPL(…); int atmel_pmecc_enable(struct atmel_pmecc_user *user, int op) { … } EXPORT_SYMBOL_GPL(…); void atmel_pmecc_disable(struct atmel_pmecc_user *user) { … } EXPORT_SYMBOL_GPL(…); int atmel_pmecc_wait_rdy(struct atmel_pmecc_user *user) { … } EXPORT_SYMBOL_GPL(…); static struct atmel_pmecc *atmel_pmecc_create(struct platform_device *pdev, const struct atmel_pmecc_caps *caps, int pmecc_res_idx, int errloc_res_idx) { … } static void devm_atmel_pmecc_put(struct device *dev, void *res) { … } static struct atmel_pmecc *atmel_pmecc_get_by_node(struct device *userdev, struct device_node *np) { … } static const int atmel_pmecc_strengths[] = …; static struct atmel_pmecc_caps at91sam9g45_caps = …; static struct atmel_pmecc_caps sama5d4_caps = …; static struct atmel_pmecc_caps sama5d2_caps = …; static const struct of_device_id __maybe_unused atmel_pmecc_legacy_match[] = …; struct atmel_pmecc *devm_atmel_pmecc_get(struct device *userdev) { … } EXPORT_SYMBOL(…); static const struct of_device_id atmel_pmecc_match[] = …; MODULE_DEVICE_TABLE(of, atmel_pmecc_match); static int atmel_pmecc_probe(struct platform_device *pdev) { … } static struct platform_driver atmel_pmecc_driver = …; module_platform_driver(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_ALIAS(…) …;
Codebase Browser
linux