target/linux/coldfire/patches/034-Enable-the-NFC-driver-for-soft_ecc.patch

   1 From 25ebef8c87221774de01d1f1de4fb615fcfc6b54 Mon Sep 17 00:00:00 2001
   2 From: Jason Jin <Jason.jin@freescale.com>
   3 Date: Thu, 4 Aug 2011 09:59:47 +0800
   4 Subject: [PATCH 34/52] Enable the NFC driver for soft_ecc.
   5
   6 If enabled YAFFS2 support, soft ecc should be used for the
   7 nand flash driver.
   8
   9 Signed-off-by: Jason Jin <Jason.jin@freescale.com>
  10 ---
  11  drivers/mtd/nand/Kconfig   |    6 ++++++
  12  drivers/mtd/nand/fsl_nfc.c |   12 +++++++++---
  13  2 files changed, 15 insertions(+), 3 deletions(-)
  14
  15 --- a/drivers/mtd/nand/Kconfig
  16 +++ b/drivers/mtd/nand/Kconfig
  17 @@ -481,6 +481,12 @@ config MTD_NAND_FSL_NFC
  18           Enables support for NAND Flash chips wired onto Freescale PowerPC
  19           processor localbus with User-Programmable Machine support.
  20
  21 +config MTD_NAND_FSL_NFC_SWECC
  22 +       bool "Software ECC"
  23 +       depends on MTD_NAND_FSL_NFC
  24 +       help
  25 +         Use software ECC.
  26 +
  27  config MTD_NAND_MXC
  28         tristate "MXC NAND support"
  29         depends on ARCH_MX2 || ARCH_MX25 || ARCH_MX3 || ARCH_MX51
  30 --- a/drivers/mtd/nand/fsl_nfc.c
  31 +++ b/drivers/mtd/nand/fsl_nfc.c
  32 @@ -403,9 +403,15 @@ fsl_nfc_command(struct mtd_info *mtd, un
  33         if (page != -1)
  34                 prv->page = page;
  35
  36 -       nfc_set_field(mtd, NFC_FLASH_CONFIG,
  37 -               CONFIG_ECC_MODE_MASK,
  38 -               CONFIG_ECC_MODE_SHIFT, ECC_45_BYTE);
  39 +       if(hardware_ecc)
  40 +               nfc_set_field(mtd, NFC_FLASH_CONFIG,
  41 +                       CONFIG_ECC_MODE_MASK,
  42 +                       CONFIG_ECC_MODE_SHIFT, ECC_45_BYTE);
  43 +       else
  44 +               /* set ECC BY_PASS */
  45 +               nfc_set_field(mtd, NFC_FLASH_CONFIG,
  46 +                               CONFIG_ECC_MODE_MASK,
  47 +                               CONFIG_ECC_MODE_SHIFT, ECC_BYPASS);
  48
  49         if (!(page%0x40)) {
  50                         nfc_set_field(mtd, NFC_FLASH_CONFIG,