patch-2.4.0-test3 linux/include/linux/mtd/jedec.h

• Lines: 70
• Date: Tue Jul 4 10:10:52 2000
• Orig file: v2.4.0-test2/linux/include/linux/mtd/jedec.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test2/linux/include/linux/mtd/jedec.h linux/include/linux/mtd/jedec.h
@@ -0,0 +1,69 @@
+
+/* 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+ * commonly use in older AMD chips and is obsolete compared with CFI.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 1.1 2000/07/04 07:21:51 jgg 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];  
+};
+
+extern const struct JEDECTable *jedec_idtoinf(__u8 mfr,__u8 id);
+
+#endif