On Tue, 5 Aug 2008, Scott Wood wrote:
Also, remove the ctrl variable in favor of passing the constants directly, and remove redundant (u8) casts.
Signed-off-by: Scott Wood scottwood@freescale.com
Tested-by: Guennadi Liakhovetski lg@denx.de
It works.
Thanks Guennadi
This patch is untested, as I don't have the hardware. Applied to u-boot-nand-flash/testing.
nand_spl/nand_boot.c | 50 ++++++++++++++++++++------------------------------ 1 files changed, 20 insertions(+), 30 deletions(-)
diff --git a/nand_spl/nand_boot.c b/nand_spl/nand_boot.c index 0f56ba5..81b4dfc 100644 --- a/nand_spl/nand_boot.c +++ b/nand_spl/nand_boot.c @@ -37,7 +37,6 @@ static int nand_command(struct mtd_info *mtd, int block, int page, int offs, u8 { struct nand_chip *this = mtd->priv; int page_addr = page + block * CFG_NAND_PAGE_COUNT;
int ctrl = NAND_CTRL_CLE | NAND_CTRL_CHANGE;
if (this->dev_ready) while (!this->dev_ready(mtd))
@@ -46,18 +45,15 @@ static int nand_command(struct mtd_info *mtd, int block, int page, int offs, u8 CFG_NAND_READ_DELAY;
/* Begin command latch cycle */
- this->cmd_ctrl(mtd, cmd, ctrl);
- this->cmd_ctrl(mtd, cmd, NAND_CTRL_CLE | NAND_CTRL_CHANGE); /* Set ALE and clear CLE to start address cycle */
- ctrl = NAND_CTRL_ALE | NAND_CTRL_CHANGE; /* Column address */
- this->cmd_ctrl(mtd, offs, ctrl);
- ctrl &= ~NAND_CTRL_CHANGE;
- this->cmd_ctrl(mtd, (u8)(page_addr & 0xff), ctrl); /* A[16:9] */
- ctrl &= ~NAND_CTRL_CHANGE;
- this->cmd_ctrl(mtd, (u8)((page_addr >> 8) & 0xff), ctrl); /* A[24:17] */
- this->cmd_ctrl(mtd, offs, NAND_CTRL_ALE | NAND_CTRL_CHANGE);
- this->cmd_ctrl(mtd, page_addr & 0xff, 0); /* A[16:9] */
- this->cmd_ctrl(mtd, (page_addr >> 8) & 0xff, 0); /* A[24:17] */
#ifdef CFG_NAND_4_ADDR_CYCLE /* One more address cycle for devices > 32MiB */
- this->cmd_ctrl(mtd, (u8)((page_addr >> 16) & 0x0f), ctrl); /* A[xx:25] */
- this->cmd_ctrl(mtd, (page_addr >> 16) & 0x0f, 0); /* A[28:25] */
#endif /* Latch in address */ this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); @@ -80,51 +76,45 @@ static int nand_command(struct mtd_info *mtd, int block, int page, int offs, u8 static int nand_command(struct mtd_info *mtd, int block, int page, int offs, u8 cmd) { struct nand_chip *this = mtd->priv;
int page_offs = offs; int page_addr = page + block * CFG_NAND_PAGE_COUNT;
if (this->dev_ready)
this->dev_ready(mtd);
while (!this->dev_ready(mtd));else CFG_NAND_READ_DELAY;
/* Emulate NAND_CMD_READOOB */ if (cmd == NAND_CMD_READOOB) {
page_offs += CFG_NAND_PAGE_SIZE;
offs += CFG_NAND_PAGE_SIZE;cmd = NAND_CMD_READ0; }
/* Begin command latch cycle */
- this->hwcontrol(mtd, NAND_CTL_SETCLE);
- this->write_byte(mtd, cmd);
- this->cmd_ctrl(mtd, cmd, NAND_CTRL_CLE | NAND_CTRL_CHANGE); /* Set ALE and clear CLE to start address cycle */
- this->hwcontrol(mtd, NAND_CTL_CLRCLE);
- this->hwcontrol(mtd, NAND_CTL_SETALE); /* Column address */
- this->write_byte(mtd, page_offs & 0xff); /* A[7:0] */
- this->write_byte(mtd, (uchar)((page_offs >> 8) & 0xff)); /* A[11:9] */
- this->cmd_ctrl(mtd, offs & 0xff,
NAND_CTRL_ALE | NAND_CTRL_CHANGE); /* A[7:0] */- this->cmd_ctrl(mtd, (offs >> 8) & 0xff, 0); /* A[11:9] */ /* Row address */
- this->write_byte(mtd, (uchar)(page_addr & 0xff)); /* A[19:12] */
- this->write_byte(mtd, (uchar)((page_addr >> 8) & 0xff)); /* A[27:20] */
- this->cmd_ctrl(mtd, (page_addr & 0xff), 0); /* A[19:12] */
- this->cmd_ctrl(mtd, ((page_addr >> 8) & 0xff), 0); /* A[27:20] */
#ifdef CFG_NAND_5_ADDR_CYCLE /* One more address cycle for devices > 128MiB */
- this->write_byte(mtd, (uchar)((page_addr >> 16) & 0x0f)); /* A[xx:28] */
- this->cmd_ctrl(mtd, (page_addr >> 16) & 0x0f, 0); /* A[31:28] */
#endif /* Latch in address */
- this->hwcontrol(mtd, NAND_CTL_CLRALE);
- /* Begin command latch cycle */
- this->hwcontrol(mtd, NAND_CTL_SETCLE);
- /* Write out the start read command */
- this->write_byte(mtd, NAND_CMD_READSTART);
- /* End command latch cycle */
- this->hwcontrol(mtd, NAND_CTL_CLRCLE);
this->cmd_ctrl(mtd, NAND_CMD_READSTART,
NAND_CTRL_CLE | NAND_CTRL_CHANGE);this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
/*
- Wait a while for the data to be ready
*/ if (this->dev_ready)
this->dev_ready(mtd);
while (!this->dev_ready(mtd));-- 1.5.6.rc1.6.gc53ad
--- Guennadi Liakhovetski, Ph.D.
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: office@denx.de