dfu: NAND specific routines for DFU operation

[karo-tx-uboot.git] / drivers / dfu / dfu_nand.c

diff --git a/drivers/dfu/dfu_nand.c b/drivers/dfu/dfu_nand.c
new file mode 100644 (file)
index 0000000..7dc89b2
--- /dev/null
+++ b/drivers/dfu/dfu_nand.c
@@ -0,0 +1,187 @@
+/*
+ * 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;
+}