summaryrefslogtreecommitdiff
path: root/board/freescale/m5329evb/nand.c
diff options
context:
space:
mode:
Diffstat (limited to 'board/freescale/m5329evb/nand.c')
-rw-r--r--board/freescale/m5329evb/nand.c57
1 files changed, 20 insertions, 37 deletions
diff --git a/board/freescale/m5329evb/nand.c b/board/freescale/m5329evb/nand.c
index 82492f6..cf27dda 100644
--- a/board/freescale/m5329evb/nand.c
+++ b/board/freescale/m5329evb/nand.c
@@ -36,56 +36,42 @@ DECLARE_GLOBAL_DATA_PTR;
#include <linux/mtd/mtd.h>
#define SET_CLE 0x10
-#define CLR_CLE ~SET_CLE
#define SET_ALE 0x08
-#define CLR_ALE ~SET_ALE
-static void nand_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
+static void nand_hwcontrol(struct mtd_info *mtdinfo, int cmd, unsigned int ctrl)
{
struct nand_chip *this = mtdinfo->priv;
-/* volatile fbcs_t *fbcs = (fbcs_t *) MMAP_FBCS; TODO: handle wp */
- u32 nand_baseaddr = (u32) this->IO_ADDR_W;
+ volatile u16 *nCE = (u16 *) CONFIG_SYS_LATCH_ADDR;
if (ctrl & NAND_CTRL_CHANGE) {
- if ( ctrl & NAND_CLE )
- nand_baseaddr |= SET_CLE;
- else
- nand_baseaddr &= CLR_CLE;
- if ( ctrl & NAND_ALE )
- nand_baseaddr |= SET_ALE;
- else
- nand_baseaddr &= CLR_ALE;
- }
- this->IO_ADDR_W = (void __iomem *)(nand_baseaddr);
+ ulong IO_ADDR_W = (ulong) this->IO_ADDR_W;
- if (cmd != NAND_CMD_NONE)
- writeb(cmd, this->IO_ADDR_W);
-}
+ IO_ADDR_W &= ~(SET_ALE | SET_CLE);
+ *nCE &= 0xFFFB;
-static void nand_write_byte(struct mtd_info *mtdinfo, u_char byte)
-{
- struct nand_chip *this = mtdinfo->priv;
- *((volatile u8 *)(this->IO_ADDR_W)) = byte;
-}
+ if (ctrl & NAND_NCE)
+ *nCE |= 0x0004;
+ if (ctrl & NAND_CLE)
+ IO_ADDR_W |= SET_CLE;
+ if (ctrl & NAND_ALE)
+ IO_ADDR_W |= SET_ALE;
-static u8 nand_read_byte(struct mtd_info *mtdinfo)
-{
- struct nand_chip *this = mtdinfo->priv;
- return (u8) (*((volatile u8 *)this->IO_ADDR_R));
-}
+ this->IO_ADDR_W = (void *)IO_ADDR_W;
+ }
-static int nand_dev_ready(struct mtd_info *mtdinfo)
-{
- return 1;
+ if (cmd != NAND_CMD_NONE)
+ writeb(cmd, this->IO_ADDR_W);
}
int board_nand_init(struct nand_chip *nand)
{
volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO;
- *((volatile u16 *)CONFIG_SYS_LATCH_ADDR) |= 0x0004;
-
- /* set up pin configuration */
+ /*
+ * set up pin configuration - enabled 2nd output buffer's signals
+ * (nand_ngpio - nCE USB1/2_PWR_EN, LATCH_GPIOs, LCD_VEEEN, etc)
+ * to use nCE signal
+ */
gpio->par_timer &= ~GPIO_PAR_TIN3_TIN3;
gpio->pddr_timer |= 0x08;
gpio->ppd_timer |= 0x08;
@@ -95,9 +81,6 @@ int board_nand_init(struct nand_chip *nand)
nand->chip_delay = 50;
nand->ecc.mode = NAND_ECC_SOFT;
nand->cmd_ctrl = nand_hwcontrol;
- nand->read_byte = nand_read_byte;
- nand->write_byte = nand_write_byte;
- nand->dev_ready = nand_dev_ready;
return 0;
}