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| author | Hauke Mehrtens <hauke@hauke-m.de> | 2016-06-20 23:32:12 +0200 |
|---|---|---|
| committer | Boris Brezillon <boris.brezillon@free-electrons.com> | 2016-07-11 08:40:16 +0200 |
| commit | ddbed9c211ebddd1ad14903f276a51321d7b8fcd (patch) | |
| tree | a91ee3b2f965e5cdbfc9cb185a1f6bcc0de0e2b6 /drivers/mtd | |
| parent | e7e1f7be335458139e0a112bd0aae40d33dfe3a8 (diff) | |
| download | op-kernel-dev-ddbed9c211ebddd1ad14903f276a51321d7b8fcd.zip op-kernel-dev-ddbed9c211ebddd1ad14903f276a51321d7b8fcd.tar.gz | |
mtd: nand: xway: extract read and write function
Extract the functions to read and write to the register of the NAND
flash controller.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/xway_nand.c | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/drivers/mtd/nand/xway_nand.c b/drivers/mtd/nand/xway_nand.c index 08f796e..4cdef24 100644 --- a/drivers/mtd/nand/xway_nand.c +++ b/drivers/mtd/nand/xway_nand.c @@ -68,6 +68,22 @@ struct xway_nand_data { unsigned long csflags; }; +static u8 xway_readb(struct mtd_info *mtd, int op) +{ + struct nand_chip *chip = mtd_to_nand(mtd); + void __iomem *nandaddr = chip->IO_ADDR_R; + + return readb(nandaddr + op); +} + +static void xway_writeb(struct mtd_info *mtd, int op, u8 value) +{ + struct nand_chip *chip = mtd_to_nand(mtd); + void __iomem *nandaddr = chip->IO_ADDR_W; + + writeb(value, nandaddr + op); +} + static void xway_select_chip(struct mtd_info *mtd, int select) { struct nand_chip *chip = mtd_to_nand(mtd); @@ -91,16 +107,13 @@ static void xway_select_chip(struct mtd_info *mtd, int select) static void xway_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl) { - struct nand_chip *this = mtd_to_nand(mtd); - unsigned long nandaddr = (unsigned long) this->IO_ADDR_W; - if (cmd == NAND_CMD_NONE) return; if (ctrl & NAND_CLE) - writeb(cmd, (void __iomem *) (nandaddr | NAND_WRITE_CMD)); + xway_writeb(mtd, NAND_WRITE_CMD, cmd); else if (ctrl & NAND_ALE) - writeb(cmd, (void __iomem *) (nandaddr | NAND_WRITE_ADDR)); + xway_writeb(mtd, NAND_WRITE_ADDR, cmd); while ((ltq_ebu_r32(EBU_NAND_WAIT) & NAND_WAIT_WR_C) == 0) ; @@ -113,10 +126,7 @@ static int xway_dev_ready(struct mtd_info *mtd) static unsigned char xway_read_byte(struct mtd_info *mtd) { - struct nand_chip *this = mtd_to_nand(mtd); - unsigned long nandaddr = (unsigned long) this->IO_ADDR_R; - - return ltq_r8((void __iomem *)(nandaddr + NAND_READ_DATA)); + return xway_readb(mtd, NAND_READ_DATA); } /* |
