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Diffstat (limited to 'target/linux/brcm47xx/patches-3.10/024-mtd-bcm47xxpart-alternative-MAGIC-for-board_data-par.patch')
-rw-r--r--target/linux/brcm47xx/patches-3.10/024-mtd-bcm47xxpart-alternative-MAGIC-for-board_data-par.patch52
1 files changed, 52 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.10/024-mtd-bcm47xxpart-alternative-MAGIC-for-board_data-par.patch b/target/linux/brcm47xx/patches-3.10/024-mtd-bcm47xxpart-alternative-MAGIC-for-board_data-par.patch
new file mode 100644
index 0000000000..5f9a5b9078
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.10/024-mtd-bcm47xxpart-alternative-MAGIC-for-board_data-par.patch
@@ -0,0 +1,52 @@
+From f0501e81fbaa51cfc8c28c60bc3fc7965fde94f4 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
+Date: Sat, 21 Dec 2013 19:39:12 +0100
+Subject: [PATCH] mtd: bcm47xxpart: alternative MAGIC for board_data partition
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Some devices (like WNDR3700v3) have board_data without MPFR magic, some
+extra header or extra NVRAM around 0x100. In such case we have to look
+for another magic which is BD 0B 0D BD (BD probably stands for Board
+Data). It's located "far far away", so instead of extending buffer add
+another mtd_read.
+
+Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
+Signed-off-by: Brian Norris <computersforpeace@gmail.com>
+---
+ drivers/mtd/bcm47xxpart.c | 16 ++++++++++++++++
+ 1 file changed, 16 insertions(+)
+
+--- a/drivers/mtd/bcm47xxpart.c
++++ b/drivers/mtd/bcm47xxpart.c
+@@ -27,6 +27,7 @@
+
+ /* Magics */
+ #define BOARD_DATA_MAGIC 0x5246504D /* MPFR */
++#define BOARD_DATA_MAGIC2 0xBD0D0BBD
+ #define CFE_MAGIC 0x43464531 /* 1EFC */
+ #define FACTORY_MAGIC 0x59544346 /* FCTY */
+ #define POT_MAGIC1 0x54544f50 /* POTT */
+@@ -192,6 +193,21 @@ static int bcm47xxpart_parse(struct mtd_
+ offset, 0);
+ continue;
+ }
++
++ /* Read middle of the block */
++ if (mtd_read(master, offset + 0x8000, 0x4,
++ &bytes_read, (uint8_t *)buf) < 0) {
++ pr_err("mtd_read error while parsing (offset: 0x%X)!\n",
++ offset);
++ continue;
++ }
++
++ /* Some devices (ex. WNDR3700v3) don't have a standard 'MPFR' */
++ if (buf[0x000 / 4] == BOARD_DATA_MAGIC2) {
++ bcm47xxpart_add_part(&parts[curr_part++], "board_data",
++ offset, MTD_WRITEABLE);
++ continue;
++ }
+ }
+
+ /* Look for NVRAM at the end of the last block. */