From 747d6f22868dd87cb54341cc22d9eb3687039735 Mon Sep 17 00:00:00 2001 From: Zachary T Welch Date: Fri, 4 Dec 2009 19:28:18 -0800 Subject: split nand.c into nand/{core,fileio,tcl}.c Moves commands into nand/tcl.c and core implementation to 'nand/core.c' and 'nand/fileio.c'. Eliminates 'flash/nand.c'. Adds 'nand/imp.h' to share routines between TCL commands and core. --- src/flash/nand/fileio.c | 244 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 244 insertions(+) create mode 100644 src/flash/nand/fileio.c (limited to 'src/flash/nand/fileio.c') diff --git a/src/flash/nand/fileio.c b/src/flash/nand/fileio.c new file mode 100644 index 00000000..fbaa8b42 --- /dev/null +++ b/src/flash/nand/fileio.c @@ -0,0 +1,244 @@ +/*************************************************************************** + * Copyright (C) 2007 by Dominic Rath * + * Copyright (C) 2002 Thomas Gleixner * + * Copyright (C) 2009 Zachary T Welch * + * * + * Partially based on drivers/mtd/nand_ids.c from Linux. * + * * + * 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. * + * * + * You should have received a copy of the GNU General Public License * + * along with this program; if not, write to the * + * Free Software Foundation, Inc., * + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * + ***************************************************************************/ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include +#include "fileio.h" + +static struct nand_ecclayout nand_oob_16 = { + .eccbytes = 6, + .eccpos = {0, 1, 2, 3, 6, 7}, + .oobfree = { + {.offset = 8, + . length = 8}} +}; + +static struct nand_ecclayout nand_oob_64 = { + .eccbytes = 24, + .eccpos = { + 40, 41, 42, 43, 44, 45, 46, 47, + 48, 49, 50, 51, 52, 53, 54, 55, + 56, 57, 58, 59, 60, 61, 62, 63}, + .oobfree = { + {.offset = 2, + .length = 38}} +}; + +void nand_fileio_init(struct nand_fileio_state *state) +{ + memset(state, 0, sizeof(*state)); + state->oob_format = NAND_OOB_NONE; +} + +int nand_fileio_start(struct command_context *cmd_ctx, + struct nand_device *nand, const char *filename, int filemode, + struct nand_fileio_state *state) +{ + if (state->address % nand->page_size) + { + command_print(cmd_ctx, "only page-aligned addresses are supported"); + return ERROR_COMMAND_SYNTAX_ERROR; + } + + duration_start(&state->bench); + + if (NULL != filename) + { + int retval = fileio_open(&state->fileio, filename, filemode, FILEIO_BINARY); + if (ERROR_OK != retval) + { + const char *msg = (FILEIO_READ == filemode) ? "read" : "write"; + command_print(cmd_ctx, "failed to open '%s' for %s access", + filename, msg); + return retval; + } + state->file_opened = true; + } + + if (!(state->oob_format & NAND_OOB_ONLY)) + { + state->page_size = nand->page_size; + state->page = malloc(nand->page_size); + } + + if (state->oob_format & (NAND_OOB_RAW | NAND_OOB_SW_ECC | NAND_OOB_SW_ECC_KW)) + { + if (nand->page_size == 512) + { + state->oob_size = 16; + state->eccpos = nand_oob_16.eccpos; + } + else if (nand->page_size == 2048) + { + state->oob_size = 64; + state->eccpos = nand_oob_64.eccpos; + } + state->oob = malloc(state->oob_size); + } + + return ERROR_OK; +} +int nand_fileio_cleanup(struct nand_fileio_state *state) +{ + if (state->file_opened) + fileio_close(&state->fileio); + + if (state->oob) + { + free(state->oob); + state->oob = NULL; + } + if (state->page) + { + free(state->page); + state->page = NULL; + } + return ERROR_OK; +} +int nand_fileio_finish(struct nand_fileio_state *state) +{ + nand_fileio_cleanup(state); + return duration_measure(&state->bench); +} + +COMMAND_HELPER(nand_fileio_parse_args, struct nand_fileio_state *state, + struct nand_device **dev, enum fileio_access filemode, + bool need_size, bool sw_ecc) +{ + nand_fileio_init(state); + + unsigned minargs = need_size ? 4 : 3; + if (CMD_ARGC < minargs) + return ERROR_COMMAND_SYNTAX_ERROR; + + struct nand_device *nand; + int retval = CALL_COMMAND_HANDLER(nand_command_get_device, 0, &nand); + if (ERROR_OK != retval) + return retval; + + if (NULL == nand->device) + { + command_print(CMD_CTX, "#%s: not probed", CMD_ARGV[0]); + return ERROR_OK; + } + + COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], state->address); + if (need_size) + { + COMMAND_PARSE_NUMBER(u32, CMD_ARGV[3], state->size); + if (state->size % nand->page_size) + { + command_print(CMD_CTX, "only page-aligned sizes are supported"); + return ERROR_COMMAND_SYNTAX_ERROR; + } + } + + if (CMD_ARGC > minargs) + { + for (unsigned i = minargs; i < CMD_ARGC; i++) + { + if (!strcmp(CMD_ARGV[i], "oob_raw")) + state->oob_format |= NAND_OOB_RAW; + else if (!strcmp(CMD_ARGV[i], "oob_only")) + state->oob_format |= NAND_OOB_RAW | NAND_OOB_ONLY; + else if (sw_ecc && !strcmp(CMD_ARGV[i], "oob_softecc")) + state->oob_format |= NAND_OOB_SW_ECC; + else if (sw_ecc && !strcmp(CMD_ARGV[i], "oob_softecc_kw")) + state->oob_format |= NAND_OOB_SW_ECC_KW; + else + { + command_print(CMD_CTX, "unknown option: %s", CMD_ARGV[i]); + return ERROR_COMMAND_SYNTAX_ERROR; + } + } + } + + retval = nand_fileio_start(CMD_CTX, nand, CMD_ARGV[1], filemode, state); + if (ERROR_OK != retval) + return retval; + + if (!need_size) + state->size = state->fileio.size; + + *dev = nand; + + return ERROR_OK; +} + +/** + * @returns If no error occurred, returns number of bytes consumed; + * otherwise, returns a negative error code.) + */ +int nand_fileio_read(struct nand_device *nand, struct nand_fileio_state *s) +{ + size_t total_read = 0; + size_t one_read; + + if (NULL != s->page) + { + fileio_read(&s->fileio, s->page_size, s->page, &one_read); + if (one_read < s->page_size) + memset(s->page + one_read, 0xff, s->page_size - one_read); + total_read += one_read; + } + + if (s->oob_format & NAND_OOB_SW_ECC) + { + uint8_t ecc[3]; + memset(s->oob, 0xff, s->oob_size); + for (uint32_t i = 0, j = 0; i < s->page_size; i += 256) + { + nand_calculate_ecc(nand, s->page + i, ecc); + s->oob[s->eccpos[j++]] = ecc[0]; + s->oob[s->eccpos[j++]] = ecc[1]; + s->oob[s->eccpos[j++]] = ecc[2]; + } + } + else if (s->oob_format & NAND_OOB_SW_ECC_KW) + { + /* + * In this case eccpos is not used as + * the ECC data is always stored contigously + * at the end of the OOB area. It consists + * of 10 bytes per 512-byte data block. + */ + uint8_t *ecc = s->oob + s->oob_size - s->page_size / 512 * 10; + memset(s->oob, 0xff, s->oob_size); + for (uint32_t i = 0; i < s->page_size; i += 512) + { + nand_calculate_ecc_kw(nand, s->page + i, ecc); + ecc += 10; + } + } + else if (NULL != s->oob) + { + fileio_read(&s->fileio, s->oob_size, s->oob, &one_read); + if (one_read < s->oob_size) + memset(s->oob + one_read, 0xff, s->oob_size - one_read); + total_read += one_read; + } + return total_read; +} + -- cgit v1.2.3