From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anton Vorontsov Date: Wed, 9 Jan 2008 20:57:51 +0300 Subject: [U-Boot-Users] [PATCH 3/5] nand: FSL UPM NAND driver In-Reply-To: <20080109175051.GA18582@localhost.localdomain> References: <20080109175051.GA18582@localhost.localdomain> Message-ID: <20080109175751.GC25068@localhost.localdomain> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Signed-off-by: Anton Vorontsov --- drivers/mtd/nand/Makefile | 2 + drivers/mtd/nand/fsl_upm.c | 188 +++++++++++++++++++++++++++++++++++++++++++ include/linux/mtd/fsl_upm.h | 34 ++++++++ 3 files changed, 224 insertions(+), 0 deletions(-) create mode 100644 drivers/mtd/nand/fsl_upm.c create mode 100644 include/linux/mtd/fsl_upm.h diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile index 42864f9..244fa09 100644 --- a/drivers/mtd/nand/Makefile +++ b/drivers/mtd/nand/Makefile @@ -32,6 +32,8 @@ COBJS-y += nand_ecc.o COBJS-y += nand_bbt.o COBJS-y += nand_util.o +COBJS-y += fsl_upm.o + COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(COBJS)) diff --git a/drivers/mtd/nand/fsl_upm.c b/drivers/mtd/nand/fsl_upm.c new file mode 100644 index 0000000..81d03e7 --- /dev/null +++ b/drivers/mtd/nand/fsl_upm.c @@ -0,0 +1,188 @@ +/* + * FSL UPM NAND driver + * + * Copyright (C) 2007 MontaVista Software, Inc. + * Anton Vorontsov + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + */ + +#include + +#if defined(CONFIG_CMD_NAND) && defined(CONFIG_NAND_FSL_UPM) +#include +#include +#include +#include +#include +#include + +#define FSL_UPM_MxMR_OP_NO (0 << 28) /* normal operation */ +#define FSL_UPM_MxMR_OP_WA (1 << 28) /* write array */ +#define FSL_UPM_MxMR_OP_RA (2 << 28) /* read array */ +#define FSL_UPM_MxMR_OP_RP (3 << 28) /* run pattern */ + +void run_pattern(struct upm_data *ud, u32 cmd, u32 pat_offset) +{ + out_be32(ud->upm_mxmr, FSL_UPM_MxMR_OP_RP | pat_offset); + out_be32(ud->upm_mar, cmd << 24); + out_8(ud->base, 0x0); + + if (ud->wait_pattern) { + /* + * Some boards/chips needs this. At least on MPC8360E-RDK we + * need it. Probably weird chip, because I don't see any need + * for this on MPC8555E + Samsung K9F1G08U0A. Usually here are + * 0-2 unexpected busy states per block read. + */ + while (!ud->dev_ready()) + debug("unexpected busy state\n"); + } + + /* back to normal operation */ + out_be32(ud->upm_mxmr, FSL_UPM_MxMR_OP_NO); + while (in_be32(ud->upm_mxmr) != FSL_UPM_MxMR_OP_NO) + eieio(); +} + +static void setup_upm(struct upm_data *ud) +{ + int i; + + /* write upm array */ + out_be32(ud->upm_mxmr, FSL_UPM_MxMR_OP_WA); + + for (i = 0; i < 64; i++) { + out_be32(ud->upm_mdr, ud->upm_table[i]); + out_8(ud->base, 0x0); + } + + /* normal operation */ + out_be32(ud->upm_mxmr, FSL_UPM_MxMR_OP_NO); + while (in_be32(ud->upm_mxmr) != FSL_UPM_MxMR_OP_NO) + eieio(); +} + +static void nand_cmdfunc(struct mtd_info *mtd, unsigned command, int column, + int page_addr) +{ + struct nand_chip *chip = mtd->priv; + struct upm_data *ud = chip->priv; + + if (command == NAND_CMD_SEQIN) { + int readcmd; + + if (column >= mtd->oobblock) { + /* OOB area */ + column -= mtd->oobblock; + readcmd = NAND_CMD_READOOB; + } else if (column < 256) { + /* First 256 bytes --> READ0 */ + readcmd = NAND_CMD_READ0; + } else { + column -= 256; + readcmd = NAND_CMD_READ1; + } + run_pattern(ud, readcmd, ud->upm_cmd_offset); + } + + run_pattern(ud, command, ud->upm_cmd_offset); + + if (column != -1) + run_pattern(ud, column, ud->upm_addr_offset); + + if (page_addr != -1) { + run_pattern(ud, page_addr, ud->upm_addr_offset); + run_pattern(ud, (page_addr >> 8) & 0xFF, ud->upm_addr_offset); + if (chip->chipsize > (32 << 20)) + run_pattern(ud, (page_addr >> 16) & 0x0f, + ud->upm_addr_offset); + } + + while (!ud->dev_ready()) + continue; +} + +static void nand_write_byte(struct mtd_info *mtd, u_char byte) +{ + struct nand_chip *chip = mtd->priv; + + out_8(chip->IO_ADDR_W, byte); +} + +static u8 nand_read_byte(struct mtd_info *mtd) +{ + struct nand_chip *chip = mtd->priv; + + return in_8(chip->IO_ADDR_R); +} + +static void nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len) +{ + int i; + struct nand_chip *chip = mtd->priv; + + for (i = 0; i < len; i++) + chip->write_byte(mtd, buf[i]); +} + +static void nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) +{ + int i; + struct nand_chip *chip = mtd->priv; + + for (i = 0; i < len; i++) + buf[i] = in_8(chip->IO_ADDR_R); +} + +static int nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len) +{ + int i; + struct nand_chip *chip = mtd->priv; + + for (i = 0; i < len; i++) { + if (buf[i] != in_8(chip->IO_ADDR_R)) + return -EFAULT; + } + + return 0; +} + +static void nand_hwcontrol(struct mtd_info *mtd, int cmd) +{ +} + +static int nand_dev_ready(struct mtd_info *mtd) +{ + struct nand_chip *chip = mtd->priv; + struct upm_data *ud = chip->priv; + + return ud->dev_ready(); +} + +int fsl_upm_nand_init(struct nand_chip *chip, struct upm_data *ud) +{ + /* yet only 8 bit accessors implemented */ + if (ud->width != 1) + return -ENOSYS; + + setup_upm(ud); + + chip->priv = ud; + chip->chip_delay = ud->chip_delay; + chip->eccmode = NAND_ECC_SOFT; + chip->hwcontrol = nand_hwcontrol; + chip->cmdfunc = nand_cmdfunc; + chip->read_byte = nand_read_byte; + chip->write_byte = nand_write_byte; + chip->read_buf = nand_read_buf; + chip->write_buf = nand_write_buf; + chip->verify_buf = nand_verify_buf; + chip->dev_ready = nand_dev_ready; + + return 0; +} +#endif /* CONFIG_CMD_NAND */ diff --git a/include/linux/mtd/fsl_upm.h b/include/linux/mtd/fsl_upm.h new file mode 100644 index 0000000..1ac7158 --- /dev/null +++ b/include/linux/mtd/fsl_upm.h @@ -0,0 +1,34 @@ +/* + * FSL UPM NAND driver + * + * Copyright (C) 2007 MontaVista Software, Inc. + * Anton Vorontsov + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + */ + +#ifndef __LINUX_MTD_NAND_FSL_UPM +#define __LINUX_MTD_NAND_FSL_UPM + +#include + +struct upm_data { + int width; + void *base; + void *upm_mxmr; + void *upm_mdr; + void *upm_mar; + u32 *upm_table; + int upm_cmd_offset; + int upm_addr_offset; + int wait_pattern; + int (*dev_ready)(void); + int chip_delay; +}; + +extern int fsl_upm_nand_init(struct nand_chip *chip, struct upm_data *ud); + +#endif -- 1.5.2.2