From a14db4165ee76dac3d04b815ba258f3f6a3f7f40 Mon Sep 17 00:00:00 2001
From: germeier <germeier>
Date: Sun, 8 Sep 2002 23:22:48 +0000
Subject: fixed some issues for MPIOs with more than one internal chip

---
 libmpio/directory.c |   9 ++---
 libmpio/fat.c       | 100 +++++++++++++++++++++++++++++++++++++---------------
 libmpio/fat.h       |   5 ++-
 libmpio/mpio.c      |  12 ++++---
 4 files changed, 86 insertions(+), 40 deletions(-)

(limited to 'libmpio')

diff --git a/libmpio/directory.c b/libmpio/directory.c
index 10a4af0..e532376 100644
--- a/libmpio/directory.c
+++ b/libmpio/directory.c
@@ -1,6 +1,6 @@
 /* 
  *
- * $Id: directory.c,v 1.3 2002/09/03 21:20:53 germeier Exp $
+ * $Id: directory.c,v 1.4 2002/09/08 23:22:48 germeier Exp $
  *
  * Library for USB MPIO-*
  *
@@ -331,11 +331,8 @@ mpio_dentry_get_startcluster(mpio_t *m, mpio_mem_t mem, BYTE *p)
 
   if (mem == MPIO_INTERNAL_MEM) 
     { 
-      cluster *= 0x20;
-      cluster +=
-	0x01000000 * ((cluster / 0x20 / (m->internal.fat_size * SECTOR_SIZE /
-				  0x10 / m->internal.chips)) + 1);
-      new->hw_address=cluster;
+      new->entry=cluster;
+      mpio_fatentry_entry2hw(m, new);      
     }  
   
   return new; 
diff --git a/libmpio/fat.c b/libmpio/fat.c
index 29a44fe..554a620 100644
--- a/libmpio/fat.c
+++ b/libmpio/fat.c
@@ -1,6 +1,6 @@
 /* 
  *
- * $Id: fat.c,v 1.3 2002/09/03 21:20:53 germeier Exp $
+ * $Id: fat.c,v 1.4 2002/09/08 23:22:48 germeier Exp $
  *
  * Library for USB MPIO-*
  *
@@ -30,6 +30,68 @@
 #include <string.h>
 #include <stdlib.h>
 
+void 
+mpio_fatentry_hw2entry(mpio_t *m,  mpio_fatentry_t *f)
+{
+  mpio_smartmedia_t *sm;  
+  BYTE chip;
+  DWORD value;
+
+  if (f->mem == MPIO_INTERNAL_MEM) 
+    {    
+      sm = &m->internal;
+
+      if (f->hw_address == 0xffffffff)
+	return ;
+
+      value  = f->hw_address;
+      chip   = value >> 24;
+
+      value &= 0xffffff;
+      value /= 0x20;
+      value += (chip-1) * (sm->max_cluster / sm->chips);
+      
+      f->entry = value;
+
+      return;
+    }
+
+  debug("This should never happen!\n");
+  exit(-1);  
+
+  return;
+}
+
+
+void 
+mpio_fatentry_entry2hw(mpio_t *m,  mpio_fatentry_t *f)
+{
+  mpio_smartmedia_t *sm;
+  DWORD cluster;
+  BYTE  chip;
+
+  if (f->mem == MPIO_INTERNAL_MEM) 
+    {    
+      sm       = &m->internal;
+
+      chip     = f->entry /  (sm->max_cluster / sm->chips);
+      cluster  = f->entry - ((sm->max_cluster / sm->chips) * chip);
+      cluster *= 0x20;
+      cluster += 0x01000000 * (chip+1);
+      
+      f->hw_address=cluster;
+
+      return;
+    }
+  
+  debug("This should never happen!\n");
+  exit(-1);
+  
+  return;
+}
+
+
+
 int
 mpio_bootblocks_read (mpio_t *m, mpio_mem_t mem)
 {
@@ -391,54 +453,36 @@ mpio_fatentry_next_entry(mpio_t *m, mpio_mem_t mem, mpio_fatentry_t *f)
   mpio_smartmedia_t *sm;
   DWORD value;
   DWORD endvalue;
-  BYTE chip;
 
   value    = mpio_fatentry_read(m, mem, f);
-  f->entry = value;
   
   if (mem == MPIO_INTERNAL_MEM) 
     {
-      sm = &m->internal;      
+      sm            = &m->internal;
       f->hw_address = value;
 
-      if (value == 0xffffffff)
-	return 0;
-
-      chip = value >> 24;
+      mpio_fatentry_hw2entry(m, f);
 
-      value &= 0xffffff;
-      value /= 0x20;
-      value += (chip-1) 
-	* (m->internal.fat_size * SECTOR_SIZE / 0x10 / m->internal.chips);  
-
-
-/* this is the opposite code in  mpio_dentry_get_startcluster */
-/*       cluster += */
-/* 	0x01000000 * ((cluster / 0x20 / (m->internal.fat_size * SECTOR_SIZE / */
-/* 				  0x10 / m->internal.chips)) + 1); */
-
-      
-      f->entry = value;
-      
+      endvalue = 0xffffffff;
     }
   
 
   if (mem == MPIO_EXTERNAL_MEM) 
     {      
-      sm    = &m->external;
+      sm       = &m->external;
+      f->entry = value;
       
       if (sm->size==128) 
 	{
 	  endvalue = 0xfff8;
 	} else {
 	  endvalue = 0xff8;
-	} 
-      
-      if (value >= endvalue)
-	return 0;
-	  
+	}      
     }  
 
+  if (value >= endvalue)
+    return 0;
+
   return 1;
 }
 
diff --git a/libmpio/fat.h b/libmpio/fat.h
index 1afa2c4..d392050 100644
--- a/libmpio/fat.h
+++ b/libmpio/fat.h
@@ -1,6 +1,6 @@
 /* 
  *
- * $Id: fat.h,v 1.2 2002/09/03 21:20:53 germeier Exp $
+ * $Id: fat.h,v 1.3 2002/09/08 23:22:48 germeier Exp $
  *
  * Library for USB MPIO-*
  *
@@ -50,4 +50,7 @@ int	         mpio_fatentry_write(mpio_t *, mpio_mem_t, mpio_fatentry_t *,
 
 int	mpio_fat_internal_find_startsector(mpio_t *, BYTE);
 
+void mpio_fatentry_hw2entry(mpio_t *,  mpio_fatentry_t *);
+void mpio_fatentry_entry2hw(mpio_t *,  mpio_fatentry_t *);
+
 #endif /* _MPIO_FAT_H_ */
diff --git a/libmpio/mpio.c b/libmpio/mpio.c
index 5b69c06..8c8152d 100644
--- a/libmpio/mpio.c
+++ b/libmpio/mpio.c
@@ -1,6 +1,6 @@
 /* 
  *
- * $Id: mpio.c,v 1.3 2002/09/03 21:20:53 germeier Exp $
+ * $Id: mpio.c,v 1.4 2002/09/08 23:22:48 germeier Exp $
  *
  * Library for USB MPIO-*
  *
@@ -54,7 +54,6 @@ mpio_init_internal(mpio_t *m)
   sm->manufacturer = m->version[i_offset];
   sm->id           = m->version[i_offset+1];
   sm->size         = mpio_id2mem(sm->id);
-  sm->max_cluster  = sm->size/16*1024;
   sm->chips        = 1;
   
   /* look for a second installed memory chip */
@@ -74,9 +73,12 @@ mpio_init_internal(mpio_t *m)
   /* used for size calculations (see mpio_memory_free) */
   mpio_id2geo(sm->id, &sm->geo);
 
-  /* read FAT information from spare area */
-  sm->fat_size=sm->size*2;          /* the *2 is need here! */
-  sm->fat=malloc(sm->fat_size*SECTOR_SIZE);
+  /* read FAT information from spare area */  
+  sm->max_cluster  = sm->size/16*1024;      /* 1 cluster == 16 KB */
+  debugn(2,"max_cluster: %d\n", sm->max_cluster);
+                                            /* 16 bytes per cluster */
+  sm->fat_size     = sm->max_cluster*16/SECTOR_SIZE;   
+  sm->fat          = malloc(sm->fat_size*SECTOR_SIZE);
   mpio_fat_read(m, MPIO_INTERNAL_MEM);
 
   /* Read directory from internal memory */
-- 
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