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

• Lines: 93
• Date: Tue Jul 4 10:12:33 2000
• Orig file: v2.4.0-test2/linux/include/linux/mtd/mapped.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test2/linux/include/linux/mtd/mapped.h linux/include/linux/mtd/mapped.h
@@ -0,0 +1,92 @@
+// -*- mode: cpp; mode: fold -*-
+// Description                                                          /*{{{*/
+// $Id: mapped.h,v 1.2 2000/03/14 17:13:12 dwmw2 Exp $
+/* ######################################################################
+
+   Memory Mapped  MTD Routines
+   
+   These routines are support routines for memory mapped chips, with
+   routines to support common sorts of flash. For devices that are based
+   on a memory mapped interface these routines provide everything necessary,
+   only a window changing function is required by the low level implementation.
+   
+   The entry point to setup and register a memory mapped MTD device, 
+   mtd_mapped_setup will perform a detection sequence that can determine
+   the type size and configuration of many sorts of chip setups. 
+
+   ROMs and RAMs are detected and passed off to very simple routines, Flash
+   writing and erasing is handled as well.
+   
+   ##################################################################### */
+									/*}}}*/
+#ifndef __MTD_FLASH_H__
+#define __MTD_FLASH_H__
+
+#include <linux/types.h>
+#include <linux/mtd/mtd.h>
+
+// MTD flags for ordinary flash
+struct JEDECTable
+{
+   u_short jedec;
+   char *name;
+   u_long size;
+   u_long sectorsize;
+   u_long capabilities;
+};
+
+// JEDEC being 0 is the end of the chip array
+struct flash_chip
+{
+   u_short jedec;
+   u_long size;
+   u_long sectorsize;
+   u_long base;
+   u_long capabilities;
+   
+   // These markers are filled in by the flash_chip_scan function
+   u_long start;
+   u_long length;
+};
+
+struct mapped_mtd_info
+{
+   struct mtd_info mtd;
+   u_long pagesize;        // Size of the memory window
+   u_long maxsize;         // Maximum MTD size in pages
+   u_char mfr,id;
+   char part[100];            // Part Catalogue number if available
+   int *lock;
+   // Multiple chip support, only used if this is type MTD_FLASH
+   u_char interleve;       // Address chip interleve (0 = concatination)
+   struct flash_chip chips[5];
+  
+   // Operations
+   unsigned long (*page)(struct mapped_mtd_info *map,unsigned long page);
+   int (*jedec_sense)(struct mapped_mtd_info *map);
+};
+
+extern struct JEDECTable mtd_JEDEC_table[];
+
+// Automatic configurators
+extern int mtd_mapped_setup(struct mapped_mtd_info *map);
+extern int mtd_mapped_remove(struct mapped_mtd_info *map);
+
+// Generic functions
+extern int flash_jedec(struct mapped_mtd_info *map);
+extern int flash_erase(struct mtd_info *map, struct erase_info *instr);
+extern int flash_write(struct mtd_info *map, loff_t start, size_t len,
+		       size_t *retlen, const u_char *buf);
+extern int rom_read(struct mtd_info *map, loff_t start, size_t len,
+		    size_t *retlen, u_char *buf);
+extern int ram_write(struct mtd_info *map, loff_t start, size_t len,
+		     size_t *retlen, const u_char *buf);
+
+// Helpers
+extern int page_jump(struct mapped_mtd_info *map,unsigned long start,
+		     unsigned long len,unsigned long *buffer,
+		     unsigned long *size);
+extern void flash_chip_scan(struct mapped_mtd_info *map,unsigned long start,
+			    unsigned long len);
+
+#endif /* __MTD_FLASH_H__ */