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authorScott Wood <scottwood@freescale.com>2008-08-13 18:24:05 -0500
committerScott Wood <scottwood@freescale.com>2008-08-13 18:24:05 -0500
commit68cf19aae48f2969ec70669604d0d776f02c8bc4 (patch)
treea9c3a3d45026033f71617e31b6a4d9822d6dc4bd
parentba22d10f39eaeedd035e8265616e31ff88e314d5 (diff)
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socrates: Update NAND driver to new API.
Also, fix some minor formatting issues, and simplify the handling of "state" for writes. Signed-off-by: Scott Wood <scottwood@freescale.com>
-rw-r--r--board/socrates/nand.c84
1 files changed, 32 insertions, 52 deletions
diff --git a/board/socrates/nand.c b/board/socrates/nand.c
index fc82ecb..6ec53f8 100644
--- a/board/socrates/nand.c
+++ b/board/socrates/nand.c
@@ -31,22 +31,20 @@
static int state;
static void nand_write_byte(struct mtd_info *mtd, u_char byte);
static void nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len);
-static void nand_write_word(struct mtd_info *mtd, u16 word);
static u_char nand_read_byte(struct mtd_info *mtd);
static u16 nand_read_word(struct mtd_info *mtd);
static void nand_read_buf(struct mtd_info *mtd, u_char *buf, int len);
static int nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len);
static int nand_device_ready(struct mtd_info *mtdinfo);
-static void nand_hwcontrol(struct mtd_info *mtdinfo, int cmd);
#define FPGA_NAND_CMD_MASK (0x7 << 28)
-#define FPGA_NAND_CMD_COMMAND (0x0 << 28)
+#define FPGA_NAND_CMD_COMMAND (0x0 << 28)
#define FPGA_NAND_CMD_ADDR (0x1 << 28)
#define FPGA_NAND_CMD_READ (0x2 << 28)
#define FPGA_NAND_CMD_WRITE (0x3 << 28)
#define FPGA_NAND_BUSY (0x1 << 15)
#define FPGA_NAND_ENABLE (0x1 << 31)
-#define FPGA_NAND_DATA_SHIFT 16
+#define FPGA_NAND_DATA_SHIFT 16
/**
* nand_write_byte - write one byte to the chip
@@ -59,16 +57,6 @@ static void nand_write_byte(struct mtd_info *mtd, u_char byte)
}
/**
- * nand_write_word - write one word to the chip
- * @mtd: MTD device structure
- * @word: data word to write
- */
-static void nand_write_word(struct mtd_info *mtd, u16 word)
-{
- nand_write_buf(mtd, (const uchar *)&word, sizeof(word));
-}
-
-/**
* nand_write_buf - write buffer to chip
* @mtd: MTD device structure
* @buf: data buffer
@@ -78,18 +66,10 @@ static void nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
{
int i;
struct nand_chip *this = mtd->priv;
- long val;
-
- if ((state & FPGA_NAND_CMD_MASK) == FPGA_NAND_CMD_MASK) {
- /* Write data */
- val = (state & FPGA_NAND_ENABLE) | FPGA_NAND_CMD_WRITE;
- } else {
- /* Write address or command */
- val = state;
- }
for (i = 0; i < len; i++) {
- out_be32(this->IO_ADDR_W, val | (buf[i] << FPGA_NAND_DATA_SHIFT));
+ out_be32(this->IO_ADDR_W,
+ state | (buf[i] << FPGA_NAND_DATA_SHIFT));
}
}
@@ -148,7 +128,7 @@ static int nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
for (i = 0; i < len; i++) {
if (buf[i] != nand_read_byte(mtd));
- return -EFAULT;
+ return -EFAULT;
}
return 0;
}
@@ -171,42 +151,42 @@ static int nand_device_ready(struct mtd_info *mtdinfo)
* @mtd: MTD device structure
* @cmd: Command
*/
-static void nand_hwcontrol(struct mtd_info *mtdinfo, int cmd)
+static void nand_hwcontrol(struct mtd_info *mtdinfo, int cmd, unsigned int ctrl)
{
+ if (ctrl & NAND_CTRL_CHANGE) {
+ state &= ~(FPGA_NAND_CMD_MASK | FPGA_NAND_ENABLE);
+
+ switch (ctrl & (NAND_ALE | NAND_CLE)) {
+ case 0:
+ state |= FPGA_NAND_CMD_WRITE;
+ break;
+
+ case NAND_ALE:
+ state |= FPGA_NAND_CMD_ADDR;
+ break;
- switch(cmd) {
- case NAND_CTL_CLRALE:
- state |= FPGA_NAND_CMD_MASK; /* use all 1s to mark */
- break;
- case NAND_CTL_CLRCLE:
- state |= FPGA_NAND_CMD_MASK; /* use all 1s to mark */
- break;
- case NAND_CTL_SETCLE:
- state = (state & ~FPGA_NAND_CMD_MASK) | FPGA_NAND_CMD_COMMAND;
- break;
- case NAND_CTL_SETALE:
- state = (state & ~FPGA_NAND_CMD_MASK) | FPGA_NAND_CMD_ADDR;
- break;
- case NAND_CTL_SETNCE:
- state |= FPGA_NAND_ENABLE;
- break;
- case NAND_CTL_CLRNCE:
- state &= ~FPGA_NAND_ENABLE;
- break;
- default:
- printf("%s: unknown cmd %#x\n", __FUNCTION__, cmd);
- break;
+ case NAND_CLE:
+ state |= FPGA_NAND_CMD_COMMAND;
+ break;
+
+ default:
+ printf("%s: unknown ctrl %#x\n", __FUNCTION__, ctrl);
+ }
+
+ if (ctrl & NAND_NCE)
+ state |= FPGA_NAND_ENABLE;
}
+
+ if (cmd != NAND_CMD_NONE)
+ nand_write_byte(mtdinfo, cmd);
}
int board_nand_init(struct nand_chip *nand)
{
- nand->hwcontrol = nand_hwcontrol;
- nand->eccmode = NAND_ECC_SOFT;
+ nand->cmd_ctrl = nand_hwcontrol;
+ nand->ecc.mode = NAND_ECC_SOFT;
nand->dev_ready = nand_device_ready;
- nand->write_byte = nand_write_byte;
nand->read_byte = nand_read_byte;
- nand->write_word = nand_write_word;
nand->read_word = nand_read_word;
nand->write_buf = nand_write_buf;
nand->read_buf = nand_read_buf;