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Diffstat (limited to 'drivers/mtd/nand/nand_bcm_umi.c')
-rw-r--r--drivers/mtd/nand/nand_bcm_umi.c149
1 files changed, 0 insertions, 149 deletions
diff --git a/drivers/mtd/nand/nand_bcm_umi.c b/drivers/mtd/nand/nand_bcm_umi.c
deleted file mode 100644
index 46a6bc9c4b74..000000000000
--- a/drivers/mtd/nand/nand_bcm_umi.c
+++ /dev/null
@@ -1,149 +0,0 @@
-/*****************************************************************************
-* Copyright 2004 - 2009 Broadcom Corporation. All rights reserved.
-*
-* Unless you and Broadcom execute a separate written software license
-* agreement governing use of this software, this software is licensed to you
-* under the terms of the GNU General Public License version 2, available at
-* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
-*
-* Notwithstanding the above, under no circumstances may you combine this
-* software in any way with any other Broadcom software provided under a
-* license other than the GPL, without Broadcom's express prior written
-* consent.
-*****************************************************************************/
-
-/* ---- Include Files ---------------------------------------------------- */
-#include <mach/reg_umi.h>
-#include "nand_bcm_umi.h"
-#ifdef BOOT0_BUILD
-#include <uart.h>
-#endif
-
-/* ---- External Variable Declarations ----------------------------------- */
-/* ---- External Function Prototypes ------------------------------------- */
-/* ---- Public Variables ------------------------------------------------- */
-/* ---- Private Constants and Types -------------------------------------- */
-/* ---- Private Function Prototypes -------------------------------------- */
-/* ---- Private Variables ------------------------------------------------ */
-/* ---- Private Functions ------------------------------------------------ */
-
-#if NAND_ECC_BCH
-/****************************************************************************
-* nand_bch_ecc_flip_bit - Routine to flip an errored bit
-*
-* PURPOSE:
-* This is a helper routine that flips the bit (0 -> 1 or 1 -> 0) of the
-* errored bit specified
-*
-* PARAMETERS:
-* datap - Container that holds the 512 byte data
-* errorLocation - Location of the bit that needs to be flipped
-*
-* RETURNS:
-* None
-****************************************************************************/
-static void nand_bcm_umi_bch_ecc_flip_bit(uint8_t *datap, int errorLocation)
-{
- int locWithinAByte = (errorLocation & REG_UMI_BCH_ERR_LOC_BYTE) >> 0;
- int locWithinAWord = (errorLocation & REG_UMI_BCH_ERR_LOC_WORD) >> 3;
- int locWithinAPage = (errorLocation & REG_UMI_BCH_ERR_LOC_PAGE) >> 5;
-
- uint8_t errorByte = 0;
- uint8_t byteMask = 1 << locWithinAByte;
-
- /* BCH uses big endian, need to change the location
- * bits to little endian */
- locWithinAWord = 3 - locWithinAWord;
-
- errorByte = datap[locWithinAPage * sizeof(uint32_t) + locWithinAWord];
-
-#ifdef BOOT0_BUILD
- puthexs("\nECC Correct Offset: ",
- locWithinAPage * sizeof(uint32_t) + locWithinAWord);
- puthexs(" errorByte:", errorByte);
- puthex8(" Bit: ", locWithinAByte);
-#endif
-
- if (errorByte & byteMask) {
- /* bit needs to be cleared */
- errorByte &= ~byteMask;
- } else {
- /* bit needs to be set */
- errorByte |= byteMask;
- }
-
- /* write back the value with the fixed bit */
- datap[locWithinAPage * sizeof(uint32_t) + locWithinAWord] = errorByte;
-}
-
-/****************************************************************************
-* nand_correct_page_bch - Routine to correct bit errors when reading NAND
-*
-* PURPOSE:
-* This routine reads the BCH registers to determine if there are any bit
-* errors during the read of the last 512 bytes of data + ECC bytes. If
-* errors exists, the routine fixes it.
-*
-* PARAMETERS:
-* datap - Container that holds the 512 byte data
-*
-* RETURNS:
-* 0 or greater = Number of errors corrected
-* (No errors are found or errors have been fixed)
-* -1 = Error(s) cannot be fixed
-****************************************************************************/
-int nand_bcm_umi_bch_correct_page(uint8_t *datap, uint8_t *readEccData,
- int numEccBytes)
-{
- int numErrors;
- int errorLocation;
- int idx;
- uint32_t regValue;
-
- /* wait for read ECC to be valid */
- regValue = nand_bcm_umi_bch_poll_read_ecc_calc();
-
- /*
- * read the control status register to determine if there
- * are error'ed bits
- * see if errors are correctible
- */
- if ((regValue & REG_UMI_BCH_CTRL_STATUS_UNCORR_ERR) > 0) {
- int i;
-
- for (i = 0; i < numEccBytes; i++) {
- if (readEccData[i] != 0xff) {
- /* errors cannot be fixed, return -1 */
- return -1;
- }
- }
- /* If ECC is unprogrammed then we can't correct,
- * assume everything OK */
- return 0;
- }
-
- if ((regValue & REG_UMI_BCH_CTRL_STATUS_CORR_ERR) == 0) {
- /* no errors */
- return 0;
- }
-
- /*
- * Fix errored bits by doing the following:
- * 1. Read the number of errors in the control and status register
- * 2. Read the error location registers that corresponds to the number
- * of errors reported
- * 3. Invert the bit in the data
- */
- numErrors = (regValue & REG_UMI_BCH_CTRL_STATUS_NB_CORR_ERROR) >> 20;
-
- for (idx = 0; idx < numErrors; idx++) {
- errorLocation =
- REG_UMI_BCH_ERR_LOC_ADDR(idx) & REG_UMI_BCH_ERR_LOC_MASK;
-
- /* Flip bit */
- nand_bcm_umi_bch_ecc_flip_bit(datap, errorLocation);
- }
- /* Errors corrected */
- return numErrors;
-}
-#endif