openwrtv4/target/linux/brcm63xx/patches-3.14/304-boardid_fixup.patch

--- a/arch/mips/bcm63xx/boards/board_bcm963xx.c
+++ b/arch/mips/bcm63xx/boards/board_bcm963xx.c
@@ -23,6 +23,7 @@
 #include "board_common.h"
 
 #include <uapi/linux/bcm933xx_hcs.h>
+#include <uapi/linux/bcm963xx_tag.h>
 
 #define PFX	"board_bcm963xx: "
 
@@ -31,6 +32,9 @@
 #define BCM963XX_KEYS_POLL_INTERVAL	20
 #define BCM963XX_KEYS_DEBOUNCE_INTERVAL	(BCM963XX_KEYS_POLL_INTERVAL * 3)
 
+#define CFE_OFFSET_64K			0x10000
+#define CFE_OFFSET_128K			0x20000
+
 /*
  * known 3368 boards
  */
@@ -722,6 +726,30 @@ static const struct board_info __initcon
 #endif
 };
 
+static void __init boardid_fixup(u8 *boot_addr)
+{
+	struct bcm_tag *tag = (struct bcm_tag *)(boot_addr + CFE_OFFSET_64K);
+	char *board_name = (char *)bcm63xx_nvram_get_name();
+
+	/* check if bcm_tag is at 64k offset */
+	if (strncmp(board_name, tag->board_id, BOARDID_LEN) != 0) {
+		/* else try 128k */
+		tag = (struct bcm_tag *)(boot_addr + CFE_OFFSET_128K);
+		if (strncmp(board_name, tag->board_id, BOARDID_LEN) != 0) {
+			/* No tag found */
+			printk(KERN_DEBUG "No bcm_tag found!\n");
+			return;
+		}
+	}
+	/* check if we should override the boardid */
+	if (tag->information1[0] != '+')
+		return;
+
+	strncpy(board_name, &tag->information1[1], BOARDID_LEN);
+
+	printk(KERN_INFO "Overriding boardid with '%s'\n", board_name);
+}
+
 /*
  * early init callback, read nvram data from flash and checksum it
  */
@@ -760,6 +788,10 @@ void __init board_prom_init(void)
 		hcs = (struct bcm_hcs *)boot_addr;
 		board_name = hcs->filename;
 	} else {
+		if (strcmp(cfe_version, "unknown") != 0) {
+			/* cfe present */
+			boardid_fixup(boot_addr);
+		}
 		board_name = bcm63xx_nvram_get_name();
 	}
 	/* find board by name */