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/* JEDEC Flash Interface. * This is an older type of interface for self programming flash. It is * commonly use in older AMD chips and is obsolete compared with CFI. * It is called JEDEC because the JEDEC association distributes the ID codes * for the chips. * * See the AMD flash databook for information on how to operate the interface. * * $Id: jedec.h,v 1.4 2005/11/07 11:14:54 gleixner Exp $ */ #ifndef __LINUX_MTD_JEDEC_H__ #define __LINUX_MTD_JEDEC_H__ #include <linux/types.h> #define MAX_JEDEC_CHIPS 16 // Listing of all supported chips and their information struct JEDECTable { __u16 jedec; char *name; unsigned long size; unsigned long sectorsize; __u32 capabilities; }; // JEDEC being 0 is the end of the chip array struct jedec_flash_chip { __u16 jedec; unsigned long size; unsigned long sectorsize; // *(__u8*)(base + (adder << addrshift)) = data << datashift // Address size = size << addrshift unsigned long base; // Byte 0 of the flash, will be unaligned unsigned int datashift; // Useful for 32bit/16bit accesses unsigned int addrshift; unsigned long offset; // linerized start. base==offset for unbanked, uninterleaved flash __u32 capabilities; // These markers are filled in by the flash_chip_scan function unsigned long start; unsigned long length; }; struct jedec_private { unsigned long size; // Total size of all the devices /* Bank handling. If sum(bank_fill) == size then this is linear flash. Otherwise the mapping has holes in it. bank_fill may be used to find the holes, but in the common symetric case bank_fill[0] == bank_fill[*], thus addresses may be computed mathmatically. bank_fill must be powers of two */ unsigned is_banked; unsigned long bank_fill[MAX_JEDEC_CHIPS]; struct jedec_flash_chip chips[MAX_JEDEC_CHIPS]; }; #endif