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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/mtd/jedec.h
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/linux/mtd/jedec.h')
-rw-r--r--include/linux/mtd/jedec.h66
1 files changed, 66 insertions, 0 deletions
diff --git a/include/linux/mtd/jedec.h b/include/linux/mtd/jedec.h
new file mode 100644
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+++ b/include/linux/mtd/jedec.h
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1
2/* JEDEC Flash Interface.
3 * This is an older type of interface for self programming flash. It is
4 * commonly use in older AMD chips and is obsolete compared with CFI.
5 * It is called JEDEC because the JEDEC association distributes the ID codes
6 * for the chips.
7 *
8 * See the AMD flash databook for information on how to operate the interface.
9 *
10 * $Id: jedec.h,v 1.3 2003/05/21 11:51:01 dwmw2 Exp $
11 */
12
13#ifndef __LINUX_MTD_JEDEC_H__
14#define __LINUX_MTD_JEDEC_H__
15
16#include <linux/types.h>
17
18#define MAX_JEDEC_CHIPS 16
19
20// Listing of all supported chips and their information
21struct JEDECTable
22{
23 __u16 jedec;
24 char *name;
25 unsigned long size;
26 unsigned long sectorsize;
27 __u32 capabilities;
28};
29
30// JEDEC being 0 is the end of the chip array
31struct jedec_flash_chip
32{
33 __u16 jedec;
34 unsigned long size;
35 unsigned long sectorsize;
36
37 // *(__u8*)(base + (adder << addrshift)) = data << datashift
38 // Address size = size << addrshift
39 unsigned long base; // Byte 0 of the flash, will be unaligned
40 unsigned int datashift; // Useful for 32bit/16bit accesses
41 unsigned int addrshift;
42 unsigned long offset; // linerized start. base==offset for unbanked, uninterleaved flash
43
44 __u32 capabilities;
45
46 // These markers are filled in by the flash_chip_scan function
47 unsigned long start;
48 unsigned long length;
49};
50
51struct jedec_private
52{
53 unsigned long size; // Total size of all the devices
54
55 /* Bank handling. If sum(bank_fill) == size then this is linear flash.
56 Otherwise the mapping has holes in it. bank_fill may be used to
57 find the holes, but in the common symetric case
58 bank_fill[0] == bank_fill[*], thus addresses may be computed
59 mathmatically. bank_fill must be powers of two */
60 unsigned is_banked;
61 unsigned long bank_fill[MAX_JEDEC_CHIPS];
62
63 struct jedec_flash_chip chips[MAX_JEDEC_CHIPS];
64};
65
66#endif