[U-Boot-Users] [PATCH] Bad block skipping for command nboot

[Thomas Knobloch]

The old implementation of command nboot does not support reading the image from
NAND flash with skipping of bad blocks. The patch implements a new version of
the nboot command: by calling nboot.jffs2 from the u-boot command line the
command will load the image from NAND flash with respect to bad blocks (by using
nand_read_opts()). This is similar to e.g. the NAND read command: "nand
read.jffs2 ...".


Signed-off-by: Thomas Knobloch <knobloch at siemens.com>

--- a/common/cmd_nand.c	2007-02-02 10:02:06.000000000 +0100
+++ b/common/cmd_nand.c	2007-07-02 10:59:26.000000000 +0200
@@ -476,14 +476,33 @@
  			   ulong offset, ulong addr, char *cmd)
  {
  	int r;
-	char *ep;
+	char *ep, *s;
  	ulong cnt;
  	image_header_t *hdr;
+	int jffs2 = 0;
+
+	s = strchr(cmd, '.');
+	if (s != NULL &&
+	    (!strcmp(s, ".jffs2") || !strcmp(s, ".e") || !strcmp(s, ".i")))
+	{
+		jffs2 = 1;
+	}

  	printf("\nLoading from %s, offset 0x%lx\n", nand->name, offset);

  	cnt = nand->oobblock;
-	r = nand_read(nand, offset, &cnt, (u_char *) addr);
+	if (jffs2) {
+		nand_read_options_t opts;
+		memset(&opts, 0, sizeof(opts));
+		opts.buffer	= (u_char*) addr;
+		opts.length	= cnt;
+		opts.offset	= offset;
+		opts.quiet      = 1;
+		r = nand_read_opts(nand, &opts);
+	} else {
+		r = nand_read(nand, offset, &cnt, (u_char *) addr);
+	}
+
  	if (r) {
  		puts("** Read error\n");
  		SHOW_BOOT_PROGRESS(-1);
@@ -501,8 +520,18 @@
  	print_image_hdr(hdr);

  	cnt = (ntohl(hdr->ih_size) + sizeof (image_header_t));
+	if (jffs2) {
+		nand_read_options_t opts;
+		memset(&opts, 0, sizeof(opts));
+		opts.buffer	= (u_char*) addr;
+		opts.length	= cnt;
+		opts.offset	= offset;
+		opts.quiet      = 1;
+		r = nand_read_opts(nand, &opts);
+	} else {
+		r = nand_read(nand, offset, &cnt, (u_char *) addr);
+	}

-	r = nand_read(nand, offset, &cnt, (u_char *) addr);
  	if (r) {
  		puts("** Read error\n");
  		SHOW_BOOT_PROGRESS(-1);
@@ -550,7 +579,7 @@
  			if (argc > 3)
  				goto usage;
  			if (argc == 3)
-				addr = simple_strtoul(argv[2], NULL, 16);
+				addr = simple_strtoul(argv[1], NULL, 16);
  			else
  				addr = CFG_LOAD_ADDR;
  			return nand_load_image(cmdtp, &nand_info[dev->id->num],
@@ -605,7 +634,7 @@

  U_BOOT_CMD(nboot, 4, 1, do_nandboot,
  	"nboot   - boot from NAND device\n",
-	"[partition] | [[[loadAddr] dev] offset]\n");
+	"[.jffs2] [partition] | [[[loadAddr] dev] offset]\n");

  #endif				/* (CONFIG_COMMANDS & CFG_CMD_NAND) */