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NAND boot: Update large page support for current API. 

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>
This commit is contained in:
Scott Wood 2008-08-05 11:15:59 -05:00
parent e4c0950854
commit 4f32d7760a
1 changed files with 20 additions and 30 deletions
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50
nand_spl/nand_boot.c
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@ -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))
;
else
CFG_NAND_READ_DELAY;