kernel: mtdsplit_uimage: add parser for Edimax devices

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

SVN-Revision: 44413

target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_uimage.c

@@ -295,10 +295,63 @@ static struct mtd_part_parser uimage_netgear_parser = {
 	.type = MTD_PARSER_TYPE_FIRMWARE,
 };
 
+/**************************************************
+ * Edimax
+ **************************************************/
+
+#define FW_EDIMAX_OFFSET	20
+#define FW_MAGIC_EDIMAX		0x43535953
+
+static ssize_t uimage_find_edimax(u_char *buf, size_t len)
+{
+	struct uimage_header *header;
+
+	if (len < FW_EDIMAX_OFFSET + sizeof(*header)) {
+		pr_err("Buffer too small for checking Edimax header\n");
+		return -ENOSPC;
+	}
+
+	header = (struct uimage_header *)(buf + FW_EDIMAX_OFFSET);
+
+	switch be32_to_cpu(header->ih_magic) {
+	case FW_MAGIC_EDIMAX:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (header->ih_os != IH_OS_LINUX ||
+	    header->ih_type != IH_TYPE_FILESYSTEM)
+		return -EINVAL;
+
+	return FW_EDIMAX_OFFSET;
+}
+
+static int
+mtdsplit_uimage_parse_edimax(struct mtd_info *master,
+			      struct mtd_partition **pparts,
+			      struct mtd_part_parser_data *data)
+{
+	return __mtdsplit_parse_uimage(master, pparts, data,
+				       uimage_find_edimax);
+}
+
+static struct mtd_part_parser uimage_edimax_parser = {
+	.owner = THIS_MODULE,
+	.name = "edimax-fw",
+	.parse_fn = mtdsplit_uimage_parse_edimax,
+	.type = MTD_PARSER_TYPE_FIRMWARE,
+};
+
+/**************************************************
+ * Init
+ **************************************************/
+
 static int __init mtdsplit_uimage_init(void)
 {
 	register_mtd_parser(&uimage_generic_parser);
 	register_mtd_parser(&uimage_netgear_parser);
+	register_mtd_parser(&uimage_edimax_parser);
 
 	return 0;
 }