jedec.h
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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- * commonly use in older AMD chips and is obsolete compared with CFI.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 1.2 2001/11/06 14:37:36 dwmw2 Exp $
- */
- #ifndef __LINUX_MTD_JEDEC_H__
- #define __LINUX_MTD_JEDEC_H__
- #include <linux/types.h>
- #include <linux/mtd/map.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