Commit fe69af00 authored by eric miao's avatar eric miao Committed by David Woodhouse
Browse files

[MTD] [NAND] support for pxa3xx 



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: default avatareric miao <eric.miao@marvell.com>
Cc: Sergey Podstavin <spodstavin@ru.mvista.com>
Signed-off-by: default avatarDavid Woodhouse <dwmw2@infradead.org>
parent b73d7e43

drivers/mtd/nand/Kconfig

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Original line number Diff line number Diff line
@@ -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

drivers/mtd/nand/Makefile

+1 −0
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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

drivers/mtd/nand/pxa3xx_nand.c

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+1249 −0

File added.

Preview size limit exceeded, changes collapsed.

include/asm-arm/arch-pxa/pxa3xx_nand.h

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#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 */

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