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nand: FSL UPM NAND driver
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
This commit is contained in:
Anton Vorontsov
Stefan Roese
parent
6cb2239ae7
commit
cd9d23053d
@ -32,6 +32,8 @@ COBJS-y += nand_ecc.o
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COBJS-y += nand_bbt.o
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COBJS-y += nand_util.o
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COBJS-y += fsl_upm.o
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COBJS := $(COBJS-y)
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SRCS := $(COBJS:.o=.c)
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OBJS := $(addprefix $(obj),$(COBJS))
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201
drivers/mtd/nand/fsl_upm.c
Normal file
201
drivers/mtd/nand/fsl_upm.c
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@ -0,0 +1,201 @@
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/*
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* FSL UPM NAND driver
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*
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* Copyright (C) 2007 MontaVista Software, Inc.
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* Anton Vorontsov <avorontsov@ru.mvista.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*/
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#include <config.h>
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#if defined(CONFIG_CMD_NAND) && defined(CONFIG_NAND_FSL_UPM)
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#include <common.h>
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#include <asm/io.h>
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#include <asm/errno.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/fsl_upm.h>
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#include <nand.h>
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#define FSL_UPM_MxMR_OP_NO (0 << 28) /* normal operation */
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#define FSL_UPM_MxMR_OP_WA (1 << 28) /* write array */
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#define FSL_UPM_MxMR_OP_RA (2 << 28) /* read array */
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#define FSL_UPM_MxMR_OP_RP (3 << 28) /* run pattern */
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static void fsl_upm_start_pattern(struct fsl_upm *upm, u32 pat_offset)
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{
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out_be32(upm->mxmr, FSL_UPM_MxMR_OP_RP | pat_offset);
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}
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static void fsl_upm_end_pattern(struct fsl_upm *upm)
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{
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out_be32(upm->mxmr, FSL_UPM_MxMR_OP_NO);
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while (in_be32(upm->mxmr) != FSL_UPM_MxMR_OP_NO)
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eieio();
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}
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static void fsl_upm_run_pattern(struct fsl_upm *upm, int width, u32 cmd)
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{
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out_be32(upm->mar, cmd << (32 - width * 8));
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out_8(upm->io_addr, 0x0);
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}
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static void fsl_upm_setup(struct fsl_upm *upm)
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{
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int i;
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/* write upm array */
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out_be32(upm->mxmr, FSL_UPM_MxMR_OP_WA);
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for (i = 0; i < 64; i++) {
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out_be32(upm->mdr, upm->array[i]);
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out_8(upm->io_addr, 0x0);
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}
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/* normal operation */
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out_be32(upm->mxmr, FSL_UPM_MxMR_OP_NO);
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while (in_be32(upm->mxmr) != FSL_UPM_MxMR_OP_NO)
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eieio();
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}
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static void fun_cmdfunc(struct mtd_info *mtd, unsigned command, int column,
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int page_addr)
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{
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struct nand_chip *chip = mtd->priv;
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struct fsl_upm_nand *fun = chip->priv;
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fsl_upm_start_pattern(&fun->upm, fun->upm_cmd_offset);
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if (command == NAND_CMD_SEQIN) {
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int readcmd;
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if (column >= mtd->oobblock) {
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/* OOB area */
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column -= mtd->oobblock;
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readcmd = NAND_CMD_READOOB;
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} else if (column < 256) {
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/* First 256 bytes --> READ0 */
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readcmd = NAND_CMD_READ0;
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} else {
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column -= 256;
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readcmd = NAND_CMD_READ1;
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}
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fsl_upm_run_pattern(&fun->upm, fun->width, readcmd);
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}
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fsl_upm_run_pattern(&fun->upm, fun->width, command);
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fsl_upm_end_pattern(&fun->upm);
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fsl_upm_start_pattern(&fun->upm, fun->upm_addr_offset);
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if (column != -1)
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fsl_upm_run_pattern(&fun->upm, fun->width, column);
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if (page_addr != -1) {
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fsl_upm_run_pattern(&fun->upm, fun->width, page_addr);
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fsl_upm_run_pattern(&fun->upm, fun->width,
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(page_addr >> 8) & 0xFF);
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if (chip->chipsize > (32 << 20)) {
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fsl_upm_run_pattern(&fun->upm, fun->width,
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(page_addr >> 16) & 0x0f);
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}
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}
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fsl_upm_end_pattern(&fun->upm);
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if (fun->wait_pattern) {
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/*
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* Some boards/chips needs this. At least on MPC8360E-RDK we
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* need it. Probably weird chip, because I don't see any need
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* for this on MPC8555E + Samsung K9F1G08U0A. Usually here are
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* 0-2 unexpected busy states per block read.
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*/
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while (!fun->dev_ready())
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debug("unexpected busy state\n");
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}
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}
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static void nand_write_byte(struct mtd_info *mtd, u_char byte)
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{
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struct nand_chip *chip = mtd->priv;
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out_8(chip->IO_ADDR_W, byte);
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}
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static u8 nand_read_byte(struct mtd_info *mtd)
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{
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struct nand_chip *chip = mtd->priv;
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return in_8(chip->IO_ADDR_R);
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}
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static void nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
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{
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int i;
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struct nand_chip *chip = mtd->priv;
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for (i = 0; i < len; i++)
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out_8(chip->IO_ADDR_W, buf[i]);
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}
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static void nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
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{
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int i;
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struct nand_chip *chip = mtd->priv;
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for (i = 0; i < len; i++)
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buf[i] = in_8(chip->IO_ADDR_R);
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}
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static int nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
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{
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int i;
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struct nand_chip *chip = mtd->priv;
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for (i = 0; i < len; i++) {
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if (buf[i] != in_8(chip->IO_ADDR_R))
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return -EFAULT;
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}
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return 0;
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}
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static void nand_hwcontrol(struct mtd_info *mtd, int cmd)
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{
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}
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static int nand_dev_ready(struct mtd_info *mtd)
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{
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struct nand_chip *chip = mtd->priv;
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struct fsl_upm_nand *fun = chip->priv;
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return fun->dev_ready();
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}
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int fsl_upm_nand_init(struct nand_chip *chip, struct fsl_upm_nand *fun)
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{
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/* yet only 8 bit accessors implemented */
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if (fun->width != 1)
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return -ENOSYS;
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fsl_upm_setup(&fun->upm);
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chip->priv = fun;
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chip->chip_delay = fun->chip_delay;
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chip->eccmode = NAND_ECC_SOFT;
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chip->cmdfunc = fun_cmdfunc;
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chip->hwcontrol = nand_hwcontrol;
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chip->read_byte = nand_read_byte;
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chip->read_buf = nand_read_buf;
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chip->write_byte = nand_write_byte;
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chip->write_buf = nand_write_buf;
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chip->verify_buf = nand_verify_buf;
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chip->dev_ready = nand_dev_ready;
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return 0;
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}
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#endif /* CONFIG_CMD_NAND */
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39
include/linux/mtd/fsl_upm.h
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39
include/linux/mtd/fsl_upm.h
Normal file
@ -0,0 +1,39 @@
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/*
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* FSL UPM NAND driver
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*
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* Copyright (C) 2007 MontaVista Software, Inc.
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* Anton Vorontsov <avorontsov@ru.mvista.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*/
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#ifndef __LINUX_MTD_NAND_FSL_UPM
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#define __LINUX_MTD_NAND_FSL_UPM
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#include <linux/mtd/nand.h>
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struct fsl_upm {
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const u32 *array;
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void __iomem *mdr;
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void __iomem *mxmr;
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void __iomem *mar;
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void __iomem *io_addr;
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};
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struct fsl_upm_nand {
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struct fsl_upm upm;
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int width;
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int upm_cmd_offset;
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int upm_addr_offset;
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int wait_pattern;
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int (*dev_ready)(void);
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int chip_delay;
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};
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extern int fsl_upm_nand_init(struct nand_chip *chip, struct fsl_upm_nand *fun);
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#endif
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