--- /dev/null
+/*
+ * dfu_nand.c -- DFU for NAND routines.
+ *
+ * Copyright (C) 2012-2013 Texas Instruments, Inc.
+ *
+ * Based on dfu_mmc.c which is:
+ * Copyright (C) 2012 Samsung Electronics
+ * author: Lukasz Majewski <l.majewski@samsung.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.
+ *
+ * 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
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <errno.h>
+#include <div64.h>
+#include <dfu.h>
+#include <linux/mtd/mtd.h>
+#include <jffs2/load_kernel.h>
+#include <nand.h>
+
+enum dfu_nand_op {
+ DFU_OP_READ = 1,
+ DFU_OP_WRITE,
+};
+
+static int nand_block_op(enum dfu_nand_op op, struct dfu_entity *dfu,
+ u64 offset, void *buf, long *len)
+{
+ loff_t start, lim;
+ size_t count, actual;
+ int ret;
+ nand_info_t *nand;
+
+ /* if buf == NULL return total size of the area */
+ if (buf == NULL) {
+ *len = dfu->data.nand.size;
+ return 0;
+ }
+
+ start = dfu->data.nand.start + offset + dfu->bad_skip;
+ lim = dfu->data.nand.start + dfu->data.nand.size - start;
+ count = *len;
+
+ if (nand_curr_device < 0 ||
+ nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE ||
+ !nand_info[nand_curr_device].name) {
+ printf("%s: invalid nand device\n", __func__);
+ return -1;
+ }
+
+ nand = &nand_info[nand_curr_device];
+
+ if (op == DFU_OP_READ)
+ ret = nand_read_skip_bad(nand, start, &count, &actual,
+ lim, buf);
+ else
+ ret = nand_write_skip_bad(nand, start, &count, &actual,
+ lim, buf, 0);
+
+ if (ret != 0) {
+ printf("%s: nand_%s_skip_bad call failed at %llx!\n",
+ __func__, op == DFU_OP_READ ? "read" : "write",
+ start);
+ return ret;
+ }
+
+ /*
+ * Find out where we stopped writing data. This can be deeper into
+ * the NAND than we expected due to having to skip bad blocks. So
+ * we must take this into account for the next write, if any.
+ */
+ if (actual > count)
+ dfu->bad_skip += actual - count;
+
+ return ret;
+}
+
+static inline int nand_block_write(struct dfu_entity *dfu,
+ u64 offset, void *buf, long *len)
+{
+ return nand_block_op(DFU_OP_WRITE, dfu, offset, buf, len);
+}
+
+static inline int nand_block_read(struct dfu_entity *dfu,
+ u64 offset, void *buf, long *len)
+{
+ return nand_block_op(DFU_OP_READ, dfu, offset, buf, len);
+}
+
+static int dfu_write_medium_nand(struct dfu_entity *dfu,
+ u64 offset, void *buf, long *len)
+{
+ int ret = -1;
+
+ switch (dfu->layout) {
+ case DFU_RAW_ADDR:
+ ret = nand_block_write(dfu, offset, buf, len);
+ break;
+ default:
+ printf("%s: Layout (%s) not (yet) supported!\n", __func__,
+ dfu_get_layout(dfu->layout));
+ }
+
+ return ret;
+}
+
+static int dfu_read_medium_nand(struct dfu_entity *dfu, u64 offset, void *buf,
+ long *len)
+{
+ int ret = -1;
+
+ switch (dfu->layout) {
+ case DFU_RAW_ADDR:
+ ret = nand_block_read(dfu, offset, buf, len);
+ break;
+ default:
+ printf("%s: Layout (%s) not (yet) supported!\n", __func__,
+ dfu_get_layout(dfu->layout));
+ }
+
+ return ret;
+}
+
+int dfu_fill_entity_nand(struct dfu_entity *dfu, char *s)
+{
+ char *st;
+ int ret, dev, part;
+
+ dfu->dev_type = DFU_DEV_NAND;
+ st = strsep(&s, " ");
+ if (!strcmp(st, "raw")) {
+ dfu->layout = DFU_RAW_ADDR;
+ dfu->data.nand.start = simple_strtoul(s, &s, 16);
+ s++;
+ dfu->data.nand.size = simple_strtoul(s, &s, 16);
+ } else if (!strcmp(st, "part")) {
+ char mtd_id[32];
+ struct mtd_device *mtd_dev;
+ u8 part_num;
+ struct part_info *pi;
+
+ dfu->layout = DFU_RAW_ADDR;
+
+ dev = simple_strtoul(s, &s, 10);
+ s++;
+ part = simple_strtoul(s, &s, 10);
+
+ sprintf(mtd_id, "%s%d,%d", "nand", dev, part - 1);
+ printf("using id '%s'\n", mtd_id);
+
+ mtdparts_init();
+
+ ret = find_dev_and_part(mtd_id, &mtd_dev, &part_num, &pi);
+ if (ret != 0) {
+ printf("Could not locate '%s'\n", mtd_id);
+ return -1;
+ }
+
+ dfu->data.nand.start = pi->offset;
+ dfu->data.nand.size = pi->size;
+
+ } else {
+ printf("%s: Memory layout (%s) not supported!\n", __func__, st);
+ return -1;
+ }
+
+ dfu->read_medium = dfu_read_medium_nand;
+ dfu->write_medium = dfu_write_medium_nand;
+
+ /* initial state */
+ dfu->inited = 0;
+
+ return 0;
+}
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