--- /dev/null
+/***************************************************************************
+ * Copyright (C) 2007 by Dominic Rath <Dominic.Rath@gmx.de> *
+ * Copyright (C) 2002 Thomas Gleixner <tglx@linutronix.de> *
+ * Copyright (C) 2009 Zachary T Welch <zw@superlucidity.net> *
+ * *
+ * 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 <flash/nand.h>
+#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;
+}
+
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