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mtd: nand: new base driver for memory mapped nand devices

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The BF537-STAMP Blackfin board had a driver for working with NAND devices
that are simply memory mapped.  Since there is nothing Blackfin specific
about this, generalize the driver a bit so that everyone can leverage it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Mike Frysinger
2009-05-25 22:42:28 -04:00
committed by Scott Wood
parent d27bc728cf
commit cd84423a09
6 changed files with 74 additions and 126 deletions
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42
include/configs/bf537-stamp.h
View File

@@ -151,36 +151,28 @@
/*
* NAND Settings
*/
/* #define CONFIG_BF537_NAND */
#ifdef CONFIG_BF537_NAND
# define CONFIG_CMD_NAND
#endif
#define CONFIG_SYS_NAND_ADDR 0x20212000
#define CONFIG_SYS_NAND_BASE CONFIG_SYS_NAND_ADDR
/* #define CONFIG_NAND_PLAT */
#define CONFIG_SYS_NAND_BASE 0x20212000
#define CONFIG_SYS_MAX_NAND_DEVICE 1
#define SECTORSIZE 512
#define ADDR_COLUMN 1
#define ADDR_PAGE 2
#define ADDR_COLUMN_PAGE 3
#define NAND_ChipID_UNKNOWN 0x00
#define NAND_MAX_FLOORS 1
#define BFIN_NAND_READY PF3
#define NAND_WAIT_READY(nand) \
#define BFIN_NAND_CLE(chip) ((unsigned long)(chip)->IO_ADDR_W | (1 << 2))
#define BFIN_NAND_ALE(chip) ((unsigned long)(chip)->IO_ADDR_W | (1 << 1))
#define BFIN_NAND_READY PF3
#define BFIN_NAND_WRITE(addr, cmd) \
do { \
int timeout = 0; \
while (!(*pPORTFIO & PF3)) \
if (timeout++ > 100000) \
break; \
bfin_write8(addr, cmd); \
SSYNC(); \
} while (0)
#define BFIN_NAND_CLE (1 << 2) /* A2 -> Command Enable */
#define BFIN_NAND_ALE (1 << 1) /* A1 -> Address Enable */
#define WRITE_NAND_COMMAND(d, adr) bfin_write8(adr | BFIN_NAND_CLE, d)
#define WRITE_NAND_ADDRESS(d, adr) bfin_write8(adr | BFIN_NAND_ALE, d)
#define WRITE_NAND(d, adr) bfin_write8(adr, d)
#define READ_NAND(adr) bfin_read8(adr)
#define NAND_PLAT_WRITE_CMD(chip, cmd) BFIN_NAND_WRITE(BFIN_NAND_CLE(chip), cmd)
#define NAND_PLAT_WRITE_ADR(chip, cmd) BFIN_NAND_WRITE(BFIN_NAND_ALE(chip), cmd)
#define NAND_PLAT_DEV_READY(chip) (bfin_read_PORTFIO() & BFIN_NAND_READY)
#define NAND_PLAT_INIT() \
do { \
bfin_write_PORTF_FER(bfin_read_PORTF_FER() & ~BFIN_NAND_READY); \
bfin_write_PORTFIO_DIR(bfin_read_PORTFIO_DIR() & ~BFIN_NAND_READY); \
bfin_write_PORTFIO_INEN(bfin_read_PORTFIO_INEN() | BFIN_NAND_READY); \
} while (0)
/*

3
include/configs/bfin_adi_common.h
View File

@@ -38,6 +38,9 @@
# define CONFIG_CMD_USB_STORAGE
# define CONFIG_DOS_PARTITION
# endif
# ifdef CONFIG_NAND_PLAT
# define CONFIG_CMD_NAND
# endif
# ifdef CONFIG_POST
# define CONFIG_CMD_DIAG
# endif