X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Fmtd%2Fnand%2Ftegra_nand.c;h=163cf29a3986058cfc3472241ac2865cd5f99516;hb=e3bf81b1e841ecabe7c8b3d48621256db8b8623e;hp=5408c51ffb52a12c1884468ab71cf8f9af4d8ac2;hpb=c0720afbb56f91fd33fb5b4e564e1037809c6304;p=u-boot diff --git a/drivers/mtd/nand/tegra_nand.c b/drivers/mtd/nand/tegra_nand.c index 5408c51ffb..163cf29a39 100644 --- a/drivers/mtd/nand/tegra_nand.c +++ b/drivers/mtd/nand/tegra_nand.c @@ -4,23 +4,7 @@ * (C) Copyright 2006 Detlev Zundel, dzu@denx.de * (C) Copyright 2006 DENX Software Engineering * - * See file CREDITS for list of people who contributed to this - * project. - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA + * SPDX-License-Identifier: GPL-2.0+ */ #include @@ -218,6 +202,34 @@ static uint8_t read_byte(struct mtd_info *mtd) return (uint8_t)dword_read; } +/** + * Read len bytes from the chip into a buffer + * + * @param mtd MTD device structure + * @param buf buffer to store data to + * @param len number of bytes to read + * + * Read function for 8bit bus-width + */ +static void read_buf(struct mtd_info *mtd, uint8_t *buf, int len) +{ + int i, s; + unsigned int reg; + struct nand_chip *chip = mtd->priv; + struct nand_drv *info = (struct nand_drv *)chip->priv; + + for (i = 0; i < len; i += 4) { + s = (len - i) > 4 ? 4 : len - i; + writel(CMD_PIO | CMD_RX | CMD_A_VALID | CMD_CE0 | + ((s - 1) << CMD_TRANS_SIZE_SHIFT) | CMD_GO, + &info->reg->command); + if (!nand_waitfor_cmd_completion(info->reg)) + puts("Command timeout during read_buf\n"); + reg = readl(&info->reg->resp); + memcpy(buf + i, ®, s); + } +} + /** * Check NAND status to see if it is ready or not * @@ -317,6 +329,7 @@ static void nand_command(struct mtd_info *mtd, unsigned int command, switch (command) { case NAND_CMD_READID: writel(NAND_CMD_READID, &info->reg->cmd_reg1); + writel(column & 0xFF, &info->reg->addr_reg1); writel(CMD_GO | CMD_CLE | CMD_ALE | CMD_PIO | CMD_RX | ((4 - 1) << CMD_TRANS_SIZE_SHIFT) @@ -324,6 +337,12 @@ static void nand_command(struct mtd_info *mtd, unsigned int command, &info->reg->command); info->pio_byte_index = 0; break; + case NAND_CMD_PARAM: + writel(NAND_CMD_PARAM, &info->reg->cmd_reg1); + writel(column & 0xFF, &info->reg->addr_reg1); + writel(CMD_GO | CMD_CLE | CMD_ALE | CMD_CE0, + &info->reg->command); + break; case NAND_CMD_READ0: writel(NAND_CMD_READ0, &info->reg->cmd_reg1); writel(NAND_CMD_READSTART, &info->reg->cmd_reg2); @@ -672,7 +691,7 @@ static int nand_rw_page(struct mtd_info *mtd, struct nand_chip *chip, * -EIO when command timeout */ static int nand_read_page_hwecc(struct mtd_info *mtd, - struct nand_chip *chip, uint8_t *buf, int page) + struct nand_chip *chip, uint8_t *buf, int oob_required, int page) { return nand_rw_page(mtd, chip, buf, page, 1, 0); } @@ -684,8 +703,8 @@ static int nand_read_page_hwecc(struct mtd_info *mtd, * @param chip nand chip info structure * @param buf data buffer */ -static void nand_write_page_hwecc(struct mtd_info *mtd, - struct nand_chip *chip, const uint8_t *buf) +static int nand_write_page_hwecc(struct mtd_info *mtd, + struct nand_chip *chip, const uint8_t *buf, int oob_required) { int page; struct nand_drv *info; @@ -696,6 +715,7 @@ static void nand_write_page_hwecc(struct mtd_info *mtd, (readl(&info->reg->addr_reg2) << 16); nand_rw_page(mtd, chip, (uint8_t *)buf, page, 1, 1); + return 0; } @@ -711,7 +731,7 @@ static void nand_write_page_hwecc(struct mtd_info *mtd, * -EIO when command timeout */ static int nand_read_page_raw(struct mtd_info *mtd, - struct nand_chip *chip, uint8_t *buf, int page) + struct nand_chip *chip, uint8_t *buf, int oob_required, int page) { return nand_rw_page(mtd, chip, buf, page, 0, 0); } @@ -723,8 +743,8 @@ static int nand_read_page_raw(struct mtd_info *mtd, * @param chip nand chip info structure * @param buf data buffer */ -static void nand_write_page_raw(struct mtd_info *mtd, - struct nand_chip *chip, const uint8_t *buf) +static int nand_write_page_raw(struct mtd_info *mtd, + struct nand_chip *chip, const uint8_t *buf, int oob_required) { int page; struct nand_drv *info; @@ -734,6 +754,7 @@ static void nand_write_page_raw(struct mtd_info *mtd, (readl(&info->reg->addr_reg2) << 16); nand_rw_page(mtd, chip, (uint8_t *)buf, page, 0, 1); + return 0; } /** @@ -838,19 +859,13 @@ static int nand_rw_oob(struct mtd_info *mtd, struct nand_chip *chip, * @param mtd mtd info structure * @param chip nand chip info structure * @param page page number to read - * @param sndcmd flag whether to issue read command or not - * @return 1 - issue read command next time - * 0 - not to issue */ static int nand_read_oob(struct mtd_info *mtd, struct nand_chip *chip, - int page, int sndcmd) + int page) { - if (sndcmd) { - chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page); - sndcmd = 0; - } + chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page); nand_rw_oob(mtd, chip, page, 0, 0); - return sndcmd; + return 0; } /** @@ -976,12 +991,14 @@ int tegra_nand_init(struct nand_chip *nand, int devnum) nand->options = LP_OPTIONS; nand->cmdfunc = nand_command; nand->read_byte = read_byte; + nand->read_buf = read_buf; nand->ecc.read_page = nand_read_page_hwecc; nand->ecc.write_page = nand_write_page_hwecc; nand->ecc.read_page_raw = nand_read_page_raw; nand->ecc.write_page_raw = nand_write_page_raw; nand->ecc.read_oob = nand_read_oob; nand->ecc.write_oob = nand_write_oob; + nand->ecc.strength = 1; nand->select_chip = nand_select_chip; nand->dev_ready = nand_dev_ready; nand->priv = &nand_ctrl;