diff options
Diffstat (limited to 'recipes/linux/linux/acern30/n30-nand-hack.patch')
| -rw-r--r-- | recipes/linux/linux/acern30/n30-nand-hack.patch | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/recipes/linux/linux/acern30/n30-nand-hack.patch b/recipes/linux/linux/acern30/n30-nand-hack.patch new file mode 100644 index 0000000000..d606f2b47c --- /dev/null +++ b/recipes/linux/linux/acern30/n30-nand-hack.patch @@ -0,0 +1,32 @@ +The flash is locked on the n30 and needs to be unlocked before every +write. It should be possible to do one big unlock operation outside +of the erase and write functions but for some strange reason that +doesn't seem to work any more, so do this ugly workaround for now. + +Index: linux-2.6.14/drivers/mtd/nand/nand_base.c +=================================================================== +--- linux-2.6.14.orig/drivers/mtd/nand/nand_base.c ++++ linux-2.6.14/drivers/mtd/nand/nand_base.c +@@ -866,6 +866,10 @@ static int nand_write_page (struct mtd_i + /* FIXME: Enable cached programming */ + cached = 0; + ++ /* unlock the page */ ++ this->cmdfunc (mtd, 0x23, -1, page); ++ this->cmdfunc (mtd, 0x24, -1, page); ++ + /* Send command to begin auto page programming */ + this->cmdfunc (mtd, NAND_CMD_SEQIN, 0x00, page); + +@@ -2037,6 +2041,11 @@ out: + static void single_erase_cmd (struct mtd_info *mtd, int page) + { + struct nand_chip *this = mtd->priv; ++ ++ /* unlock the page */ ++ this->cmdfunc (mtd, 0x23, -1, page); ++ this->cmdfunc (mtd, 0x24, -1, page); ++ + /* Send commands to erase a block */ + this->cmdfunc (mtd, NAND_CMD_ERASE1, -1, page); + this->cmdfunc (mtd, NAND_CMD_ERASE2, -1, -1); |