aboutsummaryrefslogtreecommitdiff
path: root/drivers/mtd/nand/nand_bcm_umi.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-10 10:51:35 +0900
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-10 10:51:35 +0900
commit10f39f04b2cb7a06ba5d4ea0f20bd156d0367bee (patch)
tree758f9736bcf0303da4edd5f52afd8ed10e8ea642 /drivers/mtd/nand/nand_bcm_umi.c
parent72055425e53540d9d0e59a57ac8c9b8ce77b62d5 (diff)
parentf5cf8f07423b2677cebebcebc863af77223a4972 (diff)
Merge tag 'for-linus-20121009' of git://git.infradead.org/mtd-2.6
Pull MTD updates from David Woodhouse: - Disable broken mtdchar mmap() on MMU systems - Additional ECC tests for NAND flash, and some test cleanups - New NAND and SPI chip support - Fixes/cleanup for SH FLCTL NAND controller driver - Improved hardware support for GPMI NAND controller - Conversions to device-tree support for various drivers - Removal of obsolete drivers (sbc8xxx, bcmring, etc.) - New LPC32xx drivers for MLC and SLC NAND - Further cleanup of NAND OOB/ECC handling - UAPI cleanup merge from David Howells (just moving files, since MTD headers were sorted out long ago to separate user-visible from kernel bits) * tag 'for-linus-20121009' of git://git.infradead.org/mtd-2.6: (168 commits) mtd: Disable mtdchar mmap on MMU systems UAPI: (Scripted) Disintegrate include/mtd mtd: nand: detect Samsung K9GBG08U0A, K9GAG08U0F ID mtd: nand: decode Hynix MLC, 6-byte ID length mtd: nand: increase max OOB size to 640 mtd: nand: add generic READ ID length calculation functions mtd: nand: split simple ID decode into its own function mtd: nand: split extended ID decoding into its own function mtd: nand: split BB marker options decoding into its own function mtd: nand: remove redundant ID read mtd: nand: remove unnecessary variable mtd: docg4: add missing HAS_IOMEM dependency mtd: gpmi: initialize the timing registers only one time mtd: gpmi: add EDO feature for imx6q mtd: gpmi: do not set the default values for the extra clocks mtd: gpmi: simplify the DLL setting code mtd: gpmi: add a new field for HW_GPMI_CTRL1 mtd: gpmi: do not get the clock frequency in gpmi_begin() mtd: gpmi: add a new field for HW_GPMI_TIMING1 mtd: add helpers to get the supportted ONFI timing mode ...
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 46a6bc9c4b7..00000000000
--- 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