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| author | Mike Frysinger <vapier@gentoo.org> | 2009-05-25 22:42:28 -0400 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2009-07-07 17:58:04 -0500 |
| commit | cd84423a09f3a08029fe41c1db96168debd0b51f (patch) | |
| tree | 877f8cda0130e3645a24aaf03c267117fa940abc /include/configs/bf537-stamp.h | |
| parent | d27bc728cf35e7d7996fbd77154335e66615b213 (diff) | |
| download | u-boot-imx-cd84423a09f3a08029fe41c1db96168debd0b51f.zip u-boot-imx-cd84423a09f3a08029fe41c1db96168debd0b51f.tar.gz u-boot-imx-cd84423a09f3a08029fe41c1db96168debd0b51f.tar.bz2 | |
mtd: nand: new base driver for memory mapped nand devices
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>
Diffstat (limited to 'include/configs/bf537-stamp.h')
| -rw-r--r-- | include/configs/bf537-stamp.h | 44 |
1 files changed, 18 insertions, 26 deletions
diff --git a/include/configs/bf537-stamp.h b/include/configs/bf537-stamp.h index 0a86e83..98300db 100644 --- a/include/configs/bf537-stamp.h +++ b/include/configs/bf537-stamp.h @@ -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) /* |