// SPDX-License-Identifier: GPL-2.0-only /* * (C) 2003 Red Hat, Inc. * (C) 2004 Dan Brown <[email protected]> * (C) 2004 Kalev Lember <[email protected]> * * Author: David Woodhouse <[email protected]> * Additional Diskonchip 2000 and Millennium support by Dan Brown <[email protected]> * Diskonchip Millennium Plus support by Kalev Lember <[email protected]> * * Error correction code lifted from the old docecc code * Author: Fabrice Bellard ([email protected]) * Copyright (C) 2000 Netgem S.A. * converted to the generic Reed-Solomon library by Thomas Gleixner <[email protected]> * * Interface to generic NAND code for M-Systems DiskOnChip devices */ #include <linux/kernel.h> #include <linux/init.h> #include <linux/sched.h> #include <linux/delay.h> #include <linux/rslib.h> #include <linux/moduleparam.h> #include <linux/slab.h> #include <linux/io.h> #include <linux/mtd/mtd.h> #include <linux/mtd/rawnand.h> #include <linux/mtd/doc2000.h> #include <linux/mtd/partitions.h> #include <linux/mtd/inftl.h> #include <linux/module.h> /* Where to look for the devices? */ #ifndef CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS #define CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS … #endif static unsigned long doc_locations[] __initdata = …; static struct mtd_info *doclist = …; struct doc_priv { … }; /* This is the ecc value computed by the HW ecc generator upon writing an empty page, one with all 0xff for data. */ static u_char empty_write_ecc[6] = …; #define INFTL_BBT_RESERVED_BLOCKS … #define DoC_is_MillenniumPlus(doc) … #define DoC_is_Millennium(doc) … #define DoC_is_2000(doc) … static int debug = …; module_param(debug, int, 0); static int try_dword = …; module_param(try_dword, int, 0); static int no_ecc_failures = …; module_param(no_ecc_failures, int, 0); static int no_autopart = …; module_param(no_autopart, int, 0); static int show_firmware_partition = …; module_param(show_firmware_partition, int, 0); #ifdef CONFIG_MTD_NAND_DISKONCHIP_BBTWRITE static int inftl_bbt_write = …; #else static int inftl_bbt_write = 0; #endif module_param(inftl_bbt_write, int, 0); static unsigned long doc_config_location = …; module_param(doc_config_location, ulong, 0); MODULE_PARM_DESC(…) …; /* Sector size for HW ECC */ #define SECTOR_SIZE … /* The sector bytes are packed into NB_DATA 10 bit words */ #define NB_DATA … /* Number of roots */ #define NROOTS … /* First consective root */ #define FCR … /* Number of symbols */ #define NN … /* * The HW decoder in the DoC ASIC's provides us a error syndrome, * which we must convert to a standard syndrome usable by the generic * Reed-Solomon library code. * * Fabrice Bellard figured this out in the old docecc code. I added * some comments, improved a minor bit and converted it to make use * of the generic Reed-Solomon library. tglx */ static int doc_ecc_decode(struct rs_control *rs, uint8_t *data, uint8_t *ecc) { … } static void DoC_Delay(struct doc_priv *doc, unsigned short cycles) { … } #define CDSN_CTRL_FR_B_MASK … /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ static int _DoC_WaitReady(struct doc_priv *doc) { … } static inline int DoC_WaitReady(struct doc_priv *doc) { … } static void doc2000_write_byte(struct nand_chip *this, u_char datum) { … } static void doc2000_writebuf(struct nand_chip *this, const u_char *buf, int len) { … } static void doc2000_readbuf(struct nand_chip *this, u_char *buf, int len) { … } /* * We need our own readid() here because it's called before the NAND chip * has been initialized, and calling nand_op_readid() would lead to a NULL * pointer exception when dereferencing the NAND timings. */ static void doc200x_readid(struct nand_chip *this, unsigned int cs, u8 *id) { … } static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr) { … } static void __init doc2000_count_chips(struct mtd_info *mtd) { … } static void doc2001_write_byte(struct nand_chip *this, u_char datum) { … } static void doc2001_writebuf(struct nand_chip *this, const u_char *buf, int len) { … } static void doc2001_readbuf(struct nand_chip *this, u_char *buf, int len) { … } static void doc2001plus_writebuf(struct nand_chip *this, const u_char *buf, int len) { … } static void doc2001plus_readbuf(struct nand_chip *this, u_char *buf, int len) { … } static void doc200x_write_control(struct doc_priv *doc, u8 value) { … } static void doc200x_exec_instr(struct nand_chip *this, const struct nand_op_instr *instr) { … } static int doc200x_exec_op(struct nand_chip *this, const struct nand_operation *op, bool check_only) { … } static void doc2001plus_write_pipe_term(struct doc_priv *doc) { … } static void doc2001plus_exec_instr(struct nand_chip *this, const struct nand_op_instr *instr) { … } static int doc2001plus_exec_op(struct nand_chip *this, const struct nand_operation *op, bool check_only) { … } static void doc200x_enable_hwecc(struct nand_chip *this, int mode) { … } static void doc2001plus_enable_hwecc(struct nand_chip *this, int mode) { … } /* This code is only called on write */ static int doc200x_calculate_ecc(struct nand_chip *this, const u_char *dat, unsigned char *ecc_code) { … } static int doc200x_correct_data(struct nand_chip *this, u_char *dat, u_char *read_ecc, u_char *isnull) { … } //u_char mydatabuf[528]; static int doc200x_ooblayout_ecc(struct mtd_info *mtd, int section, struct mtd_oob_region *oobregion) { … } static int doc200x_ooblayout_free(struct mtd_info *mtd, int section, struct mtd_oob_region *oobregion) { … } static const struct mtd_ooblayout_ops doc200x_ooblayout_ops = …; /* Find the (I)NFTL Media Header, and optionally also the mirror media header. On successful return, buf will contain a copy of the media header for further processing. id is the string to scan for, and will presumably be either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media header. The page #s of the found media headers are placed in mh0_page and mh1_page in the DOC private structure. */ static int __init find_media_headers(struct mtd_info *mtd, u_char *buf, const char *id, int findmirror) { … } static inline int __init nftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) { … } /* This is a stripped-down copy of the code in inftlmount.c */ static inline int __init inftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) { … } static int __init nftl_scan_bbt(struct mtd_info *mtd) { … } static int __init inftl_scan_bbt(struct mtd_info *mtd) { … } static inline int __init doc2000_init(struct mtd_info *mtd) { … } static inline int __init doc2001_init(struct mtd_info *mtd) { … } static inline int __init doc2001plus_init(struct mtd_info *mtd) { … } static int doc200x_attach_chip(struct nand_chip *chip) { … } static const struct nand_controller_ops doc200x_ops = …; static const struct nand_controller_ops doc2001plus_ops = …; static int __init doc_probe(unsigned long physadr) { … } static void release_nanddoc(void) { … } static int __init init_nanddoc(void) { … } static void __exit cleanup_nanddoc(void) { … } module_init(…) …; module_exit(cleanup_nanddoc); MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …;
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