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f51cdaf191
Currently, 83xx, 86xx, and 85xx have a lot of duplicated code dedicated to defining and manipulating the LBC registers. Merge this into a single spot. To do this, we have to decide on a common name for the data structure that holds the lbc registers - it will now be known as fsl_lbc_t, and we adopt a common name for the immap layouts that include the lbc - this was previously known as either im_lbc or lbus; use the former. In addition, create accessors for the BR/OR regs that use in/out_be32 and use those instead of the mismash of access methods currently in play. I have done a successful ppc build all and tested a board or two from each processor family. Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Acked-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
823 lines
22 KiB
C
823 lines
22 KiB
C
/* Freescale Enhanced Local Bus Controller FCM NAND driver
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*
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* Copyright (c) 2006-2008 Freescale Semiconductor
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*
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* Authors: Nick Spence <nick.spence@freescale.com>,
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* Scott Wood <scottwood@freescale.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <common.h>
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#include <malloc.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/nand.h>
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#include <linux/mtd/nand_ecc.h>
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#include <asm/io.h>
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#include <asm/errno.h>
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#ifdef VERBOSE_DEBUG
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#define DEBUG_ELBC
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#define vdbg(format, arg...) printf("DEBUG: " format, ##arg)
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#else
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#define vdbg(format, arg...) do {} while (0)
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#endif
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/* Can't use plain old DEBUG because the linux mtd
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* headers define it as a macro.
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*/
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#ifdef DEBUG_ELBC
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#define dbg(format, arg...) printf("DEBUG: " format, ##arg)
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#else
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#define dbg(format, arg...) do {} while (0)
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#endif
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#define MAX_BANKS 8
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#define ERR_BYTE 0xFF /* Value returned for read bytes when read failed */
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#define FCM_TIMEOUT_MSECS 10 /* Maximum number of mSecs to wait for FCM */
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#define LTESR_NAND_MASK (LTESR_FCT | LTESR_PAR | LTESR_CC)
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struct fsl_elbc_ctrl;
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/* mtd information per set */
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struct fsl_elbc_mtd {
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struct mtd_info mtd;
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struct nand_chip chip;
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struct fsl_elbc_ctrl *ctrl;
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struct device *dev;
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int bank; /* Chip select bank number */
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u8 __iomem *vbase; /* Chip select base virtual address */
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int page_size; /* NAND page size (0=512, 1=2048) */
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unsigned int fmr; /* FCM Flash Mode Register value */
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};
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/* overview of the fsl elbc controller */
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struct fsl_elbc_ctrl {
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struct nand_hw_control controller;
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struct fsl_elbc_mtd *chips[MAX_BANKS];
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/* device info */
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fsl_lbc_t *regs;
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u8 __iomem *addr; /* Address of assigned FCM buffer */
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unsigned int page; /* Last page written to / read from */
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unsigned int read_bytes; /* Number of bytes read during command */
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unsigned int column; /* Saved column from SEQIN */
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unsigned int index; /* Pointer to next byte to 'read' */
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unsigned int status; /* status read from LTESR after last op */
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unsigned int mdr; /* UPM/FCM Data Register value */
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unsigned int use_mdr; /* Non zero if the MDR is to be set */
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unsigned int oob; /* Non zero if operating on OOB data */
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uint8_t *oob_poi; /* Place to write ECC after read back */
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};
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/* These map to the positions used by the FCM hardware ECC generator */
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/* Small Page FLASH with FMR[ECCM] = 0 */
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static struct nand_ecclayout fsl_elbc_oob_sp_eccm0 = {
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.eccbytes = 3,
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.eccpos = {6, 7, 8},
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.oobfree = { {0, 5}, {9, 7} },
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};
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/* Small Page FLASH with FMR[ECCM] = 1 */
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static struct nand_ecclayout fsl_elbc_oob_sp_eccm1 = {
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.eccbytes = 3,
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.eccpos = {8, 9, 10},
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.oobfree = { {0, 5}, {6, 2}, {11, 5} },
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};
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/* Large Page FLASH with FMR[ECCM] = 0 */
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static struct nand_ecclayout fsl_elbc_oob_lp_eccm0 = {
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.eccbytes = 12,
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.eccpos = {6, 7, 8, 22, 23, 24, 38, 39, 40, 54, 55, 56},
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.oobfree = { {1, 5}, {9, 13}, {25, 13}, {41, 13}, {57, 7} },
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};
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/* Large Page FLASH with FMR[ECCM] = 1 */
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static struct nand_ecclayout fsl_elbc_oob_lp_eccm1 = {
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.eccbytes = 12,
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.eccpos = {8, 9, 10, 24, 25, 26, 40, 41, 42, 56, 57, 58},
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.oobfree = { {1, 7}, {11, 13}, {27, 13}, {43, 13}, {59, 5} },
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};
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/*
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* fsl_elbc_oob_lp_eccm* specify that LP NAND's OOB free area starts at offset
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* 1, so we have to adjust bad block pattern. This pattern should be used for
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* x8 chips only. So far hardware does not support x16 chips anyway.
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*/
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static u8 scan_ff_pattern[] = { 0xff, };
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static struct nand_bbt_descr largepage_memorybased = {
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.options = 0,
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.offs = 0,
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.len = 1,
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.pattern = scan_ff_pattern,
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};
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/*
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* ELBC may use HW ECC, so that OOB offsets, that NAND core uses for bbt,
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* interfere with ECC positions, that's why we implement our own descriptors.
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* OOB {11, 5}, works for both SP and LP chips, with ECCM = 1 and ECCM = 0.
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*/
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static u8 bbt_pattern[] = {'B', 'b', 't', '0' };
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static u8 mirror_pattern[] = {'1', 't', 'b', 'B' };
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static struct nand_bbt_descr bbt_main_descr = {
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.options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
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NAND_BBT_2BIT | NAND_BBT_VERSION,
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.offs = 11,
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.len = 4,
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.veroffs = 15,
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.maxblocks = 4,
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.pattern = bbt_pattern,
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};
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static struct nand_bbt_descr bbt_mirror_descr = {
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.options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
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NAND_BBT_2BIT | NAND_BBT_VERSION,
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.offs = 11,
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.len = 4,
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.veroffs = 15,
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.maxblocks = 4,
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.pattern = mirror_pattern,
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};
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/*=================================*/
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/*
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* Set up the FCM hardware block and page address fields, and the fcm
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* structure addr field to point to the correct FCM buffer in memory
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*/
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static void set_addr(struct mtd_info *mtd, int column, int page_addr, int oob)
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{
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struct nand_chip *chip = mtd->priv;
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struct fsl_elbc_mtd *priv = chip->priv;
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struct fsl_elbc_ctrl *ctrl = priv->ctrl;
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fsl_lbc_t *lbc = ctrl->regs;
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int buf_num;
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ctrl->page = page_addr;
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if (priv->page_size) {
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out_be32(&lbc->fbar, page_addr >> 6);
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out_be32(&lbc->fpar,
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((page_addr << FPAR_LP_PI_SHIFT) & FPAR_LP_PI) |
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(oob ? FPAR_LP_MS : 0) | column);
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buf_num = (page_addr & 1) << 2;
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} else {
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out_be32(&lbc->fbar, page_addr >> 5);
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out_be32(&lbc->fpar,
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((page_addr << FPAR_SP_PI_SHIFT) & FPAR_SP_PI) |
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(oob ? FPAR_SP_MS : 0) | column);
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buf_num = page_addr & 7;
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}
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ctrl->addr = priv->vbase + buf_num * 1024;
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ctrl->index = column;
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/* for OOB data point to the second half of the buffer */
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if (oob)
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ctrl->index += priv->page_size ? 2048 : 512;
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vdbg("set_addr: bank=%d, ctrl->addr=0x%p (0x%p), "
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"index %x, pes %d ps %d\n",
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buf_num, ctrl->addr, priv->vbase, ctrl->index,
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chip->phys_erase_shift, chip->page_shift);
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}
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/*
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* execute FCM command and wait for it to complete
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*/
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static int fsl_elbc_run_command(struct mtd_info *mtd)
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{
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struct nand_chip *chip = mtd->priv;
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struct fsl_elbc_mtd *priv = chip->priv;
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struct fsl_elbc_ctrl *ctrl = priv->ctrl;
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fsl_lbc_t *lbc = ctrl->regs;
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long long end_tick;
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u32 ltesr;
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/* Setup the FMR[OP] to execute without write protection */
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out_be32(&lbc->fmr, priv->fmr | 3);
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if (ctrl->use_mdr)
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out_be32(&lbc->mdr, ctrl->mdr);
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vdbg("fsl_elbc_run_command: fmr=%08x fir=%08x fcr=%08x\n",
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in_be32(&lbc->fmr), in_be32(&lbc->fir), in_be32(&lbc->fcr));
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vdbg("fsl_elbc_run_command: fbar=%08x fpar=%08x "
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"fbcr=%08x bank=%d\n",
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in_be32(&lbc->fbar), in_be32(&lbc->fpar),
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in_be32(&lbc->fbcr), priv->bank);
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/* execute special operation */
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out_be32(&lbc->lsor, priv->bank);
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/* wait for FCM complete flag or timeout */
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end_tick = usec2ticks(FCM_TIMEOUT_MSECS * 1000) + get_ticks();
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ltesr = 0;
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while (end_tick > get_ticks()) {
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ltesr = in_be32(&lbc->ltesr);
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if (ltesr & LTESR_CC)
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break;
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}
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ctrl->status = ltesr & LTESR_NAND_MASK;
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out_be32(&lbc->ltesr, ctrl->status);
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out_be32(&lbc->lteatr, 0);
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/* store mdr value in case it was needed */
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if (ctrl->use_mdr)
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ctrl->mdr = in_be32(&lbc->mdr);
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ctrl->use_mdr = 0;
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vdbg("fsl_elbc_run_command: stat=%08x mdr=%08x fmr=%08x\n",
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ctrl->status, ctrl->mdr, in_be32(&lbc->fmr));
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/* returns 0 on success otherwise non-zero) */
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return ctrl->status == LTESR_CC ? 0 : -EIO;
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}
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static void fsl_elbc_do_read(struct nand_chip *chip, int oob)
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{
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struct fsl_elbc_mtd *priv = chip->priv;
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struct fsl_elbc_ctrl *ctrl = priv->ctrl;
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fsl_lbc_t *lbc = ctrl->regs;
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if (priv->page_size) {
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out_be32(&lbc->fir,
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(FIR_OP_CW0 << FIR_OP0_SHIFT) |
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(FIR_OP_CA << FIR_OP1_SHIFT) |
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(FIR_OP_PA << FIR_OP2_SHIFT) |
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(FIR_OP_CW1 << FIR_OP3_SHIFT) |
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(FIR_OP_RBW << FIR_OP4_SHIFT));
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out_be32(&lbc->fcr, (NAND_CMD_READ0 << FCR_CMD0_SHIFT) |
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(NAND_CMD_READSTART << FCR_CMD1_SHIFT));
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} else {
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out_be32(&lbc->fir,
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(FIR_OP_CW0 << FIR_OP0_SHIFT) |
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(FIR_OP_CA << FIR_OP1_SHIFT) |
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(FIR_OP_PA << FIR_OP2_SHIFT) |
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(FIR_OP_RBW << FIR_OP3_SHIFT));
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if (oob)
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out_be32(&lbc->fcr,
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NAND_CMD_READOOB << FCR_CMD0_SHIFT);
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else
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out_be32(&lbc->fcr, NAND_CMD_READ0 << FCR_CMD0_SHIFT);
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}
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}
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/* cmdfunc send commands to the FCM */
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static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command,
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int column, int page_addr)
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{
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struct nand_chip *chip = mtd->priv;
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struct fsl_elbc_mtd *priv = chip->priv;
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struct fsl_elbc_ctrl *ctrl = priv->ctrl;
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fsl_lbc_t *lbc = ctrl->regs;
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ctrl->use_mdr = 0;
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/* clear the read buffer */
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ctrl->read_bytes = 0;
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if (command != NAND_CMD_PAGEPROG)
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ctrl->index = 0;
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switch (command) {
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/* READ0 and READ1 read the entire buffer to use hardware ECC. */
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case NAND_CMD_READ1:
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column += 256;
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/* fall-through */
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case NAND_CMD_READ0:
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vdbg("fsl_elbc_cmdfunc: NAND_CMD_READ0, page_addr:"
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" 0x%x, column: 0x%x.\n", page_addr, column);
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out_be32(&lbc->fbcr, 0); /* read entire page to enable ECC */
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set_addr(mtd, 0, page_addr, 0);
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ctrl->read_bytes = mtd->writesize + mtd->oobsize;
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ctrl->index += column;
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fsl_elbc_do_read(chip, 0);
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fsl_elbc_run_command(mtd);
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return;
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/* READOOB reads only the OOB because no ECC is performed. */
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case NAND_CMD_READOOB:
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vdbg("fsl_elbc_cmdfunc: NAND_CMD_READOOB, page_addr:"
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" 0x%x, column: 0x%x.\n", page_addr, column);
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out_be32(&lbc->fbcr, mtd->oobsize - column);
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set_addr(mtd, column, page_addr, 1);
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ctrl->read_bytes = mtd->writesize + mtd->oobsize;
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fsl_elbc_do_read(chip, 1);
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fsl_elbc_run_command(mtd);
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return;
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/* READID must read all 5 possible bytes while CEB is active */
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case NAND_CMD_READID:
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vdbg("fsl_elbc_cmdfunc: NAND_CMD_READID.\n");
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out_be32(&lbc->fir, (FIR_OP_CW0 << FIR_OP0_SHIFT) |
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(FIR_OP_UA << FIR_OP1_SHIFT) |
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(FIR_OP_RBW << FIR_OP2_SHIFT));
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out_be32(&lbc->fcr, NAND_CMD_READID << FCR_CMD0_SHIFT);
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/* 5 bytes for manuf, device and exts */
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out_be32(&lbc->fbcr, 5);
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ctrl->read_bytes = 5;
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ctrl->use_mdr = 1;
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ctrl->mdr = 0;
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set_addr(mtd, 0, 0, 0);
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fsl_elbc_run_command(mtd);
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return;
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/* ERASE1 stores the block and page address */
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case NAND_CMD_ERASE1:
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vdbg("fsl_elbc_cmdfunc: NAND_CMD_ERASE1, "
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"page_addr: 0x%x.\n", page_addr);
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set_addr(mtd, 0, page_addr, 0);
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return;
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/* ERASE2 uses the block and page address from ERASE1 */
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case NAND_CMD_ERASE2:
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vdbg("fsl_elbc_cmdfunc: NAND_CMD_ERASE2.\n");
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out_be32(&lbc->fir,
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(FIR_OP_CW0 << FIR_OP0_SHIFT) |
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(FIR_OP_PA << FIR_OP1_SHIFT) |
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(FIR_OP_CM1 << FIR_OP2_SHIFT));
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out_be32(&lbc->fcr,
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(NAND_CMD_ERASE1 << FCR_CMD0_SHIFT) |
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(NAND_CMD_ERASE2 << FCR_CMD1_SHIFT));
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out_be32(&lbc->fbcr, 0);
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ctrl->read_bytes = 0;
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fsl_elbc_run_command(mtd);
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return;
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/* SEQIN sets up the addr buffer and all registers except the length */
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case NAND_CMD_SEQIN: {
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u32 fcr;
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vdbg("fsl_elbc_cmdfunc: NAND_CMD_SEQIN/PAGE_PROG, "
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"page_addr: 0x%x, column: 0x%x.\n",
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page_addr, column);
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ctrl->column = column;
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ctrl->oob = 0;
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if (priv->page_size) {
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fcr = (NAND_CMD_SEQIN << FCR_CMD0_SHIFT) |
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(NAND_CMD_PAGEPROG << FCR_CMD1_SHIFT);
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out_be32(&lbc->fir,
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(FIR_OP_CW0 << FIR_OP0_SHIFT) |
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(FIR_OP_CA << FIR_OP1_SHIFT) |
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(FIR_OP_PA << FIR_OP2_SHIFT) |
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(FIR_OP_WB << FIR_OP3_SHIFT) |
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(FIR_OP_CW1 << FIR_OP4_SHIFT));
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} else {
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fcr = (NAND_CMD_PAGEPROG << FCR_CMD1_SHIFT) |
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(NAND_CMD_SEQIN << FCR_CMD2_SHIFT);
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out_be32(&lbc->fir,
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(FIR_OP_CW0 << FIR_OP0_SHIFT) |
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(FIR_OP_CM2 << FIR_OP1_SHIFT) |
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(FIR_OP_CA << FIR_OP2_SHIFT) |
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(FIR_OP_PA << FIR_OP3_SHIFT) |
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(FIR_OP_WB << FIR_OP4_SHIFT) |
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(FIR_OP_CW1 << FIR_OP5_SHIFT));
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if (column >= mtd->writesize) {
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/* OOB area --> READOOB */
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column -= mtd->writesize;
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fcr |= NAND_CMD_READOOB << FCR_CMD0_SHIFT;
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ctrl->oob = 1;
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} else if (column < 256) {
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/* First 256 bytes --> READ0 */
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fcr |= NAND_CMD_READ0 << FCR_CMD0_SHIFT;
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} else {
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/* Second 256 bytes --> READ1 */
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fcr |= NAND_CMD_READ1 << FCR_CMD0_SHIFT;
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}
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}
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out_be32(&lbc->fcr, fcr);
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set_addr(mtd, column, page_addr, ctrl->oob);
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return;
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}
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/* PAGEPROG reuses all of the setup from SEQIN and adds the length */
|
|
case NAND_CMD_PAGEPROG: {
|
|
int full_page;
|
|
vdbg("fsl_elbc_cmdfunc: NAND_CMD_PAGEPROG "
|
|
"writing %d bytes.\n", ctrl->index);
|
|
|
|
/* if the write did not start at 0 or is not a full page
|
|
* then set the exact length, otherwise use a full page
|
|
* write so the HW generates the ECC.
|
|
*/
|
|
if (ctrl->oob || ctrl->column != 0 ||
|
|
ctrl->index != mtd->writesize + mtd->oobsize) {
|
|
out_be32(&lbc->fbcr, ctrl->index);
|
|
full_page = 0;
|
|
} else {
|
|
out_be32(&lbc->fbcr, 0);
|
|
full_page = 1;
|
|
}
|
|
|
|
fsl_elbc_run_command(mtd);
|
|
|
|
/* Read back the page in order to fill in the ECC for the
|
|
* caller. Is this really needed?
|
|
*/
|
|
if (full_page && ctrl->oob_poi) {
|
|
out_be32(&lbc->fbcr, 3);
|
|
set_addr(mtd, 6, page_addr, 1);
|
|
|
|
ctrl->read_bytes = mtd->writesize + 9;
|
|
|
|
fsl_elbc_do_read(chip, 1);
|
|
fsl_elbc_run_command(mtd);
|
|
|
|
memcpy_fromio(ctrl->oob_poi + 6,
|
|
&ctrl->addr[ctrl->index], 3);
|
|
ctrl->index += 3;
|
|
}
|
|
|
|
ctrl->oob_poi = NULL;
|
|
return;
|
|
}
|
|
|
|
/* CMD_STATUS must read the status byte while CEB is active */
|
|
/* Note - it does not wait for the ready line */
|
|
case NAND_CMD_STATUS:
|
|
out_be32(&lbc->fir,
|
|
(FIR_OP_CM0 << FIR_OP0_SHIFT) |
|
|
(FIR_OP_RBW << FIR_OP1_SHIFT));
|
|
out_be32(&lbc->fcr, NAND_CMD_STATUS << FCR_CMD0_SHIFT);
|
|
out_be32(&lbc->fbcr, 1);
|
|
set_addr(mtd, 0, 0, 0);
|
|
ctrl->read_bytes = 1;
|
|
|
|
fsl_elbc_run_command(mtd);
|
|
|
|
/* The chip always seems to report that it is
|
|
* write-protected, even when it is not.
|
|
*/
|
|
out_8(ctrl->addr, in_8(ctrl->addr) | NAND_STATUS_WP);
|
|
return;
|
|
|
|
/* RESET without waiting for the ready line */
|
|
case NAND_CMD_RESET:
|
|
dbg("fsl_elbc_cmdfunc: NAND_CMD_RESET.\n");
|
|
out_be32(&lbc->fir, FIR_OP_CM0 << FIR_OP0_SHIFT);
|
|
out_be32(&lbc->fcr, NAND_CMD_RESET << FCR_CMD0_SHIFT);
|
|
fsl_elbc_run_command(mtd);
|
|
return;
|
|
|
|
default:
|
|
printf("fsl_elbc_cmdfunc: error, unsupported command 0x%x.\n",
|
|
command);
|
|
}
|
|
}
|
|
|
|
static void fsl_elbc_select_chip(struct mtd_info *mtd, int chip)
|
|
{
|
|
/* The hardware does not seem to support multiple
|
|
* chips per bank.
|
|
*/
|
|
}
|
|
|
|
/*
|
|
* Write buf to the FCM Controller Data Buffer
|
|
*/
|
|
static void fsl_elbc_write_buf(struct mtd_info *mtd, const u8 *buf, int len)
|
|
{
|
|
struct nand_chip *chip = mtd->priv;
|
|
struct fsl_elbc_mtd *priv = chip->priv;
|
|
struct fsl_elbc_ctrl *ctrl = priv->ctrl;
|
|
unsigned int bufsize = mtd->writesize + mtd->oobsize;
|
|
|
|
if (len <= 0) {
|
|
printf("write_buf of %d bytes", len);
|
|
ctrl->status = 0;
|
|
return;
|
|
}
|
|
|
|
if ((unsigned int)len > bufsize - ctrl->index) {
|
|
printf("write_buf beyond end of buffer "
|
|
"(%d requested, %u available)\n",
|
|
len, bufsize - ctrl->index);
|
|
len = bufsize - ctrl->index;
|
|
}
|
|
|
|
memcpy_toio(&ctrl->addr[ctrl->index], buf, len);
|
|
/*
|
|
* This is workaround for the weird elbc hangs during nand write,
|
|
* Scott Wood says: "...perhaps difference in how long it takes a
|
|
* write to make it through the localbus compared to a write to IMMR
|
|
* is causing problems, and sync isn't helping for some reason."
|
|
* Reading back the last byte helps though.
|
|
*/
|
|
in_8(&ctrl->addr[ctrl->index] + len - 1);
|
|
|
|
ctrl->index += len;
|
|
}
|
|
|
|
/*
|
|
* read a byte from either the FCM hardware buffer if it has any data left
|
|
* otherwise issue a command to read a single byte.
|
|
*/
|
|
static u8 fsl_elbc_read_byte(struct mtd_info *mtd)
|
|
{
|
|
struct nand_chip *chip = mtd->priv;
|
|
struct fsl_elbc_mtd *priv = chip->priv;
|
|
struct fsl_elbc_ctrl *ctrl = priv->ctrl;
|
|
|
|
/* If there are still bytes in the FCM, then use the next byte. */
|
|
if (ctrl->index < ctrl->read_bytes)
|
|
return in_8(&ctrl->addr[ctrl->index++]);
|
|
|
|
printf("read_byte beyond end of buffer\n");
|
|
return ERR_BYTE;
|
|
}
|
|
|
|
/*
|
|
* Read from the FCM Controller Data Buffer
|
|
*/
|
|
static void fsl_elbc_read_buf(struct mtd_info *mtd, u8 *buf, int len)
|
|
{
|
|
struct nand_chip *chip = mtd->priv;
|
|
struct fsl_elbc_mtd *priv = chip->priv;
|
|
struct fsl_elbc_ctrl *ctrl = priv->ctrl;
|
|
int avail;
|
|
|
|
if (len < 0)
|
|
return;
|
|
|
|
avail = min((unsigned int)len, ctrl->read_bytes - ctrl->index);
|
|
memcpy_fromio(buf, &ctrl->addr[ctrl->index], avail);
|
|
ctrl->index += avail;
|
|
|
|
if (len > avail)
|
|
printf("read_buf beyond end of buffer "
|
|
"(%d requested, %d available)\n",
|
|
len, avail);
|
|
}
|
|
|
|
/*
|
|
* Verify buffer against the FCM Controller Data Buffer
|
|
*/
|
|
static int fsl_elbc_verify_buf(struct mtd_info *mtd,
|
|
const u_char *buf, int len)
|
|
{
|
|
struct nand_chip *chip = mtd->priv;
|
|
struct fsl_elbc_mtd *priv = chip->priv;
|
|
struct fsl_elbc_ctrl *ctrl = priv->ctrl;
|
|
int i;
|
|
|
|
if (len < 0) {
|
|
printf("write_buf of %d bytes", len);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if ((unsigned int)len > ctrl->read_bytes - ctrl->index) {
|
|
printf("verify_buf beyond end of buffer "
|
|
"(%d requested, %u available)\n",
|
|
len, ctrl->read_bytes - ctrl->index);
|
|
|
|
ctrl->index = ctrl->read_bytes;
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (i = 0; i < len; i++)
|
|
if (in_8(&ctrl->addr[ctrl->index + i]) != buf[i])
|
|
break;
|
|
|
|
ctrl->index += len;
|
|
return i == len && ctrl->status == LTESR_CC ? 0 : -EIO;
|
|
}
|
|
|
|
/* This function is called after Program and Erase Operations to
|
|
* check for success or failure.
|
|
*/
|
|
static int fsl_elbc_wait(struct mtd_info *mtd, struct nand_chip *chip)
|
|
{
|
|
struct fsl_elbc_mtd *priv = chip->priv;
|
|
struct fsl_elbc_ctrl *ctrl = priv->ctrl;
|
|
fsl_lbc_t *lbc = ctrl->regs;
|
|
|
|
if (ctrl->status != LTESR_CC)
|
|
return NAND_STATUS_FAIL;
|
|
|
|
/* Use READ_STATUS command, but wait for the device to be ready */
|
|
ctrl->use_mdr = 0;
|
|
out_be32(&lbc->fir,
|
|
(FIR_OP_CW0 << FIR_OP0_SHIFT) |
|
|
(FIR_OP_RBW << FIR_OP1_SHIFT));
|
|
out_be32(&lbc->fcr, NAND_CMD_STATUS << FCR_CMD0_SHIFT);
|
|
out_be32(&lbc->fbcr, 1);
|
|
set_addr(mtd, 0, 0, 0);
|
|
ctrl->read_bytes = 1;
|
|
|
|
fsl_elbc_run_command(mtd);
|
|
|
|
if (ctrl->status != LTESR_CC)
|
|
return NAND_STATUS_FAIL;
|
|
|
|
/* The chip always seems to report that it is
|
|
* write-protected, even when it is not.
|
|
*/
|
|
out_8(ctrl->addr, in_8(ctrl->addr) | NAND_STATUS_WP);
|
|
return fsl_elbc_read_byte(mtd);
|
|
}
|
|
|
|
static int fsl_elbc_read_page(struct mtd_info *mtd,
|
|
struct nand_chip *chip,
|
|
uint8_t *buf, int page)
|
|
{
|
|
fsl_elbc_read_buf(mtd, buf, mtd->writesize);
|
|
fsl_elbc_read_buf(mtd, chip->oob_poi, mtd->oobsize);
|
|
|
|
if (fsl_elbc_wait(mtd, chip) & NAND_STATUS_FAIL)
|
|
mtd->ecc_stats.failed++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* ECC will be calculated automatically, and errors will be detected in
|
|
* waitfunc.
|
|
*/
|
|
static void fsl_elbc_write_page(struct mtd_info *mtd,
|
|
struct nand_chip *chip,
|
|
const uint8_t *buf)
|
|
{
|
|
struct fsl_elbc_mtd *priv = chip->priv;
|
|
struct fsl_elbc_ctrl *ctrl = priv->ctrl;
|
|
|
|
fsl_elbc_write_buf(mtd, buf, mtd->writesize);
|
|
fsl_elbc_write_buf(mtd, chip->oob_poi, mtd->oobsize);
|
|
|
|
ctrl->oob_poi = chip->oob_poi;
|
|
}
|
|
|
|
static struct fsl_elbc_ctrl *elbc_ctrl;
|
|
|
|
static void fsl_elbc_ctrl_init(void)
|
|
{
|
|
elbc_ctrl = kzalloc(sizeof(*elbc_ctrl), GFP_KERNEL);
|
|
if (!elbc_ctrl)
|
|
return;
|
|
|
|
elbc_ctrl->regs = LBC_BASE_ADDR;
|
|
|
|
/* clear event registers */
|
|
out_be32(&elbc_ctrl->regs->ltesr, LTESR_NAND_MASK);
|
|
out_be32(&elbc_ctrl->regs->lteatr, 0);
|
|
|
|
/* Enable interrupts for any detected events */
|
|
out_be32(&elbc_ctrl->regs->lteir, LTESR_NAND_MASK);
|
|
|
|
elbc_ctrl->read_bytes = 0;
|
|
elbc_ctrl->index = 0;
|
|
elbc_ctrl->addr = NULL;
|
|
}
|
|
|
|
int board_nand_init(struct nand_chip *nand)
|
|
{
|
|
struct fsl_elbc_mtd *priv;
|
|
uint32_t br = 0, or = 0;
|
|
|
|
if (!elbc_ctrl) {
|
|
fsl_elbc_ctrl_init();
|
|
if (!elbc_ctrl)
|
|
return -1;
|
|
}
|
|
|
|
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
priv->ctrl = elbc_ctrl;
|
|
priv->vbase = nand->IO_ADDR_R;
|
|
|
|
/* Find which chip select it is connected to. It'd be nice
|
|
* if we could pass more than one datum to the NAND driver...
|
|
*/
|
|
for (priv->bank = 0; priv->bank < MAX_BANKS; priv->bank++) {
|
|
phys_addr_t base_addr = virt_to_phys(nand->IO_ADDR_R);
|
|
|
|
br = in_be32(&elbc_ctrl->regs->bank[priv->bank].br);
|
|
or = in_be32(&elbc_ctrl->regs->bank[priv->bank].or);
|
|
|
|
if ((br & BR_V) && (br & BR_MSEL) == BR_MS_FCM &&
|
|
(br & or & BR_BA) == BR_PHYS_ADDR(base_addr))
|
|
break;
|
|
}
|
|
|
|
if (priv->bank >= MAX_BANKS) {
|
|
printf("fsl_elbc_nand: address did not match any "
|
|
"chip selects\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
elbc_ctrl->chips[priv->bank] = priv;
|
|
|
|
/* fill in nand_chip structure */
|
|
/* set up function call table */
|
|
nand->read_byte = fsl_elbc_read_byte;
|
|
nand->write_buf = fsl_elbc_write_buf;
|
|
nand->read_buf = fsl_elbc_read_buf;
|
|
nand->verify_buf = fsl_elbc_verify_buf;
|
|
nand->select_chip = fsl_elbc_select_chip;
|
|
nand->cmdfunc = fsl_elbc_cmdfunc;
|
|
nand->waitfunc = fsl_elbc_wait;
|
|
|
|
/* set up nand options */
|
|
nand->bbt_td = &bbt_main_descr;
|
|
nand->bbt_md = &bbt_mirror_descr;
|
|
|
|
/* set up nand options */
|
|
nand->options = NAND_NO_READRDY | NAND_NO_AUTOINCR |
|
|
NAND_USE_FLASH_BBT;
|
|
|
|
nand->controller = &elbc_ctrl->controller;
|
|
nand->priv = priv;
|
|
|
|
nand->ecc.read_page = fsl_elbc_read_page;
|
|
nand->ecc.write_page = fsl_elbc_write_page;
|
|
|
|
#ifdef CONFIG_FSL_ELBC_FMR
|
|
priv->fmr = CONFIG_FSL_ELBC_FMR;
|
|
#else
|
|
priv->fmr = (15 << FMR_CWTO_SHIFT) | (2 << FMR_AL_SHIFT);
|
|
|
|
/*
|
|
* Hardware expects small page has ECCM0, large page has ECCM1
|
|
* when booting from NAND. Board config can override if not
|
|
* booting from NAND.
|
|
*/
|
|
if (or & OR_FCM_PGS)
|
|
priv->fmr |= FMR_ECCM;
|
|
#endif
|
|
|
|
/* If CS Base Register selects full hardware ECC then use it */
|
|
if ((br & BR_DECC) == BR_DECC_CHK_GEN) {
|
|
nand->ecc.mode = NAND_ECC_HW;
|
|
|
|
nand->ecc.layout = (priv->fmr & FMR_ECCM) ?
|
|
&fsl_elbc_oob_sp_eccm1 :
|
|
&fsl_elbc_oob_sp_eccm0;
|
|
|
|
nand->ecc.size = 512;
|
|
nand->ecc.bytes = 3;
|
|
nand->ecc.steps = 1;
|
|
} else {
|
|
/* otherwise fall back to default software ECC */
|
|
nand->ecc.mode = NAND_ECC_SOFT;
|
|
}
|
|
|
|
/* Large-page-specific setup */
|
|
if (or & OR_FCM_PGS) {
|
|
priv->page_size = 1;
|
|
nand->badblock_pattern = &largepage_memorybased;
|
|
|
|
/* adjust ecc setup if needed */
|
|
if ((br & BR_DECC) == BR_DECC_CHK_GEN) {
|
|
nand->ecc.steps = 4;
|
|
nand->ecc.layout = (priv->fmr & FMR_ECCM) ?
|
|
&fsl_elbc_oob_lp_eccm1 :
|
|
&fsl_elbc_oob_lp_eccm0;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|