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[MTD] [NAND] support for pxa3xx

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This is preliminary since:

1. It supports only _one_ chip select at the moment. As there is no
   existing platforms available using two chip selects of the NAND
   controller, it shall really not include code for supporting the
   2nd chip select for now, as such code cannot be verified.

2. It resorts to the default and simpliest memory based badblock
   table

3. Only limited types of nand flash are currently supported. Most
   PXA3xx processors come with on-chip NAND flash dies, so there
   isn't much flexibility for other types of NAND.

4. The NAND controller should be configured to detect the device's
   ID, thus making it difficult to use nand_scan_ident() to assist
   the detection process (though it's not impossible)

TODO: fix all the above limitations of cuz :-)

Signed-off-by: eric miao <eric.miao@marvell.com>
Cc: Sergey Podstavin <spodstavin@ru.mvista.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
eric miao 2008-02-14 15:48:23 +08:00 committed by David Woodhouse
parent b73d7e4381
commit fe69af002e
4 changed files with 1275 additions and 0 deletions
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7
drivers/mtd/nand/Kconfig
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@ -279,6 +279,13 @@ config MTD_NAND_AT91
Enables support for NAND Flash / Smart Media Card interface
on Atmel AT91 processors.
config MTD_NAND_PXA3xx
bool "Support for NAND flash devices on PXA3xx"
depends on MTD_NAND && PXA3xx
help
This enables the driver for the NAND flash device found on
PXA3xx processors
config MTD_NAND_CM_X270
tristate "Support for NAND Flash on CM-X270 modules"
depends on MTD_NAND && MACH_ARMCORE

1
drivers/mtd/nand/Makefile
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@ -27,6 +27,7 @@ obj-$(CONFIG_MTD_NAND_NDFC) += ndfc.o
obj-$(CONFIG_MTD_NAND_AT91) += at91_nand.o
obj-$(CONFIG_MTD_NAND_CM_X270) += cmx270_nand.o
obj-$(CONFIG_MTD_NAND_BASLER_EXCITE) += excite_nandflash.o
obj-$(CONFIG_MTD_NAND_PXA3xx) += pxa3xx_nand.o
obj-$(CONFIG_MTD_NAND_PLATFORM) += plat_nand.o
obj-$(CONFIG_MTD_ALAUDA) += alauda.o
obj-$(CONFIG_MTD_NAND_PASEMI) += pasemi_nand.o

1249
drivers/mtd/nand/pxa3xx_nand.c Normal file
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File diff suppressed because it is too large Load diff

18
include/asm-arm/arch-pxa/pxa3xx_nand.h Normal file
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@ -0,0 +1,18 @@
#ifndef __ASM_ARCH_PXA3XX_NAND_H
#define __ASM_ARCH_PXA3XX_NAND_H
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
struct pxa3xx_nand_platform_data {
/* the data flash bus is shared between the Static Memory
* Controller and the Data Flash Controller, the arbiter
* controls the ownership of the bus
*/
int enable_arbiter;
struct mtd_partition *parts;
unsigned int nr_parts;
};
#endif /* __ASM_ARCH_PXA3XX_NAND_H */