Added disk/partition handling

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@405 a1c6a512-1295-4272-9138-f99709370657

8 files changed, 164 insertions, 58 deletions

diff --git a/firmware/Makefile b/firmware/Makefile
index 91cb19955e..efa7c59b4e 100644
--- a/firmware/Makefile
+++ b/firmware/Makefile
@@ -35,10 +35,10 @@ archos.bin : archos.elf
         $(OC) -O binary archos.elf archos.bin
 
 archos.asm: archos.bin
-        sh2d -sh1 archos.bin > archos.asm
+        ../tools/sh2d -sh1 archos.bin > archos.asm
 
 archos.mod : archos.bin
-        scramble archos.bin archos.mod
+        ../tools/scramble archos.bin archos.mod
 
 dist:
         tar czvf dist.tar.gz Makefile main.c start.s app.lds
diff --git a/firmware/common/disk.c b/firmware/common/disk.c
new file mode 100644
index 0000000000..9572f115e5
--- /dev/null
+++ b/firmware/common/disk.c
@@ -0,0 +1,74 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Björn Stenberg
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "ata.h"
+#include "debug.h"
+#include "disk.h"
+
+/* Partition table entry layout:
+   -----------------------
+   0: 0x80 - active
+   1: starting head
+   2: starting sector
+   3: starting cylinder
+   4: partition type
+   5: end head
+   6: end sector
+   7: end cylinder
+   8-11: starting sector (LBA)
+   12-15: nr of sectors in partition
+*/
+
+#define BYTES2INT32(array,pos) \
+          (array[pos] | (array[pos+1] << 8 ) | \
+          (array[pos+2] << 16 ) | (array[pos+3] << 24 ))
+
+struct partinfo part[8];
+
+int disk_init(void)
+{
+    int i;
+    unsigned char sector[512];
+
+    ata_read_sectors(0,1,&sector);
+
+    /* check that the boot sector is initialized */
+    if ( (sector[510] != 0x55) ||
+         (sector[511] != 0xaa)) {
+        DEBUGF("Bad boot sector signature\n");
+        return -1;
+    }
+
+    /* parse partitions */
+    for ( i=0; i<4; i++ ) {
+        unsigned char* ptr = sector + 0x1be + 16*i;
+        part[i].type  = ptr[4];
+        part[i].start = BYTES2INT32(ptr, 8);
+        part[i].size  = BYTES2INT32(ptr, 12);
+
+        DEBUGF("Part%d: Type %02x, start: %08x size: %08x\n",
+               i,part[i].type,part[i].start,part[i].size);
+
+        /* extended? */
+        if ( part[i].type == 5 ) {
+            /* not handled yet */
+        }
+    }
+
+    return 0;
+}
diff --git a/firmware/common/disk.h b/firmware/common/disk.h
new file mode 100644
index 0000000000..1e95c73c6b
--- /dev/null
+++ b/firmware/common/disk.h
@@ -0,0 +1,32 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Björn Stenberg
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#ifndef _DISK_H_
+#define _DISK_H_
+
+struct partinfo {
+    unsigned long start; /* first sector (LBA) */
+    unsigned long size;  /* number of sectors */
+    unsigned char type;
+};
+
+extern struct partinfo part[8];
+
+int disk_init(void);
+
+#endif
diff --git a/firmware/drivers/fat.c b/firmware/drivers/fat.c
index 6192d4619f..329e149a7a 100644
--- a/firmware/drivers/fat.c
+++ b/firmware/drivers/fat.c
@@ -133,25 +133,6 @@ static int fat_cache_dirty[256];
 static unsigned char lastsector[SECTOR_SIZE];
 static unsigned char lastsector2[SECTOR_SIZE];
 
-#ifdef TEST_FAT
-
-int main(int argc, char *argv[])
-{
-    struct bpb bpb;
-    
-    memset(fat_cache, 0, sizeof(fat_cache));
-    memset(fat_cache_dirty, 0, sizeof(fat_cache_dirty));
-    
-    if(ata_init())
-        DEBUGF("*** Warning! The disk is uninitialized\n");
-    else
-        fat_mount(&bpb);
-
-    dbg_console(&bpb);
-    return 0;
-}
-#endif
-
 static int sec2cluster(struct bpb *bpb, unsigned int sec)
 {
     if ( sec < bpb->firstdatasector )
@@ -183,7 +164,7 @@ static int first_sector_of_cluster(struct bpb *bpb, unsigned int cluster)
     return (cluster - 2) * bpb->bpb_secperclus + bpb->firstdatasector;
 }
 
-int fat_mount(struct bpb *bpb)
+int fat_mount(struct bpb *bpb, int startsector)
 {
     unsigned char buf[SECTOR_SIZE];
     int err;
@@ -191,7 +172,7 @@ int fat_mount(struct bpb *bpb)
     int countofclusters;
 
     /* Read the sector */
-    err = ata_read_sectors(0,1,buf);
+    err = ata_read_sectors(startsector,1,buf);
     if(err)
     {
         DEBUGF( "fat_mount() - Couldn't read BPB (error code %i)\n",
@@ -200,6 +181,7 @@ int fat_mount(struct bpb *bpb)
     }
 
     memset(bpb, 0, sizeof(struct bpb));
+    bpb->startsector = startsector;
     
     strncpy(bpb->bs_oemname, &buf[BS_OEMNAME], 8);
     bpb->bs_oemname[8] = 0;
@@ -306,20 +288,6 @@ static int bpb_is_sane(struct bpb *bpb)
         DEBUGF( "bpb_is_sane() - Warning: RootEntCnt is not 512 (%i)\n",
                 bpb->bpb_rootentcnt);
     }
-    if(bpb->bpb_totsec16 < 200)
-    {
-        if(bpb->bpb_totsec16 == 0)
-        {
-            DEBUGF( "bpb_is_sane() - Error: TotSec16 is 0\n");
-            return -1;
-        }
-        else
-        {
-            DEBUGF( "bpb_is_sane() - Warning: TotSec16 "
-                    "is quite small (%i)\n",
-                    bpb->bpb_totsec16);
-        }
-    }
     if(bpb->bpb_media != 0xf0 && bpb->bpb_media < 0xf8)
     {
         DEBUGF( "bpb_is_sane() - Warning: Non-standard "
@@ -349,7 +317,7 @@ static void *cache_fat_sector(struct bpb *bpb, int secnum)
             DEBUGF( "cache_fat_sector() - Out of memory\n");
             return NULL;
         }
-        if(ata_read_sectors(secnum,1,sec))
+        if(ata_read_sectors(secnum+bpb->startsector,1,sec))
         {
             DEBUGF( "cache_fat_sector() - Could"
                     " not read sector %d\n",
@@ -447,14 +415,17 @@ static int flush_fat(struct bpb *bpb)
         {
             DEBUGF("Flushing FAT sector %d\n", i);
             sec = fat_cache[i];
-            err = ata_write_sectors(i + bpb->bpb_rsvdseccnt,1,sec);
+            err = ata_write_sectors(i + bpb->bpb_rsvdseccnt + bpb->startsector,
+                                    1,sec);
             if(err)
             {
                 DEBUGF( "flush_fat() - Couldn't write"
                         " sector (%d)\n", i + bpb->bpb_rsvdseccnt);
                 return -1;
             }
-            err = ata_write_sectors(i + bpb->bpb_rsvdseccnt + fatsz,1,sec);
+            err = ata_write_sectors(i + bpb->bpb_rsvdseccnt + fatsz +
+                                    bpb->startsector,
+                                    1,sec);
             if(err)
             {
                 DEBUGF( "flush_fat() - Couldn't write"
@@ -559,7 +530,7 @@ static int add_dir_entry(struct bpb *bpb,
 
         DEBUGF("Reading sector %d...\n", sec);
         /* Read the next sector in the current dir */
-        err = ata_read_sectors(sec,1,buf);
+        err = ata_read_sectors(sec + bpb->startsector,1,buf);
         if(err)
         {
             DEBUGF( "add_dir_entry() - Couldn't read dir sector"
@@ -624,7 +595,7 @@ static int add_dir_entry(struct bpb *bpb,
                         }
                     }
 
-                    err = ata_write_sectors(sec,1,buf);
+                    err = ata_write_sectors(sec + bpb->startsector,1,buf);
                     if(err)
                     {
                         DEBUGF( "add_dir_entry() - "
@@ -821,7 +792,8 @@ int fat_read(struct bpb *bpb,
     int err, i;
 
     for ( i=0; i<sectorcount; i++ ) {
-        err = ata_read_sectors(sector,1,(char*)buf+(i*SECTOR_SIZE));
+        err = ata_read_sectors(sector + bpb->startsector, 1,
+                               (char*)buf+(i*SECTOR_SIZE));
         if(err) {
             DEBUGF( "fat_read() - Couldn't read sector %d"
                     " (error code %i)\n", sector,err);
@@ -898,7 +870,7 @@ int fat_opendir(struct bpb *bpb,
     }
 
     /* Read the first sector in the current dir */
-    err = ata_read_sectors(sec,1,ent->cached_buf);
+    err = ata_read_sectors(sec + bpb->startsector,1,ent->cached_buf);
     if(err)
     {
         DEBUGF( "fat_getfirst() - Couldn't read dir sector"
@@ -1037,7 +1009,8 @@ int fat_getnext(struct bpb *bpb,
             }
    
             /* Read the next sector */
-            err = ata_read_sectors(ent->cached_sec,1,ent->cached_buf);
+            err = ata_read_sectors(ent->cached_sec + bpb->startsector, 1,
+                                   ent->cached_buf);
             if(err)
             {
                 DEBUGF( "fat_getnext() - Couldn't read dir sector"
diff --git a/firmware/drivers/fat.h b/firmware/drivers/fat.h
index 7f014a8aa1..faec5384dd 100644
--- a/firmware/drivers/fat.h
+++ b/firmware/drivers/fat.h
@@ -60,6 +60,7 @@ struct bpb
     int totalsectors;
     int rootdirsector;
     int firstdatasector;
+    int startsector;
 };
 
 struct fat_direntry
@@ -100,7 +101,7 @@ struct fat_fileent
     int sectornum;       /* sector number in this cluster */
 };
 
-extern int fat_mount(struct bpb *bpb);
+extern int fat_mount(struct bpb *bpb, int startsector);
 
 #ifdef DISK_WRITE
 extern int fat_create_file(struct bpb *bpb, 
diff --git a/firmware/test/fat/Makefile b/firmware/test/fat/Makefile
index 8b60aba99c..6b253fe16c 100644
--- a/firmware/test/fat/Makefile
+++ b/firmware/test/fat/Makefile
@@ -1,18 +1,25 @@
+FIRMWARE = ../..
 DRIVERS = ../../drivers
 
-CFLAGS = -g -Wall -DTEST_FAT -I$(DRIVERS) -I.
+CFLAGS = -g -Wall -DTEST_FAT -I$(DRIVERS) -I$(FIRMWARE)/common -I$(FIRMWARE) -I. -DDEBUG -DCRT_DISPLAY
 
 TARGET = fat
 
-$(TARGET): fat.o ata-sim.o debug.o
+$(TARGET): fat.o ata-sim.o debug.o main.o disk.o
         gcc -g -o fat $+ -lfl
 
 fat.o: $(DRIVERS)/fat.c $(DRIVERS)/fat.h $(DRIVERS)/ata.h
         $(CC) $(CFLAGS) -c $< -o $@
 
+disk.o: $(FIRMWARE)/common/disk.c
+        $(CC) $(CFLAGS) -c $< -o $@
+
+debug.o: $(FIRMWARE)/debug.c
+        $(CC) $(CFLAGS) -c $< -o $@
+
 ata-sim.o: ata-sim.c $(DRIVERS)/ata.h
 
-debug.o: debug.c debug.h $(DRIVERS)/ata.h
+main.o: main.c $(DRIVERS)/ata.h
 
 clean:
         rm -f *.o $(TARGET)
diff --git a/firmware/test/fat/debug.h b/firmware/test/fat/debug.h
deleted file mode 100644
index ff786ab2b1..0000000000
--- a/firmware/test/fat/debug.h
+++ /dev/null
@@ -1,9 +0,0 @@
-#ifndef DEBUG_H
-#define DEBUG_H
-
-void dbg_dump_sector(int sec);
-void dbg_dump_buffer(unsigned char *buf);
-void dbg_print_bpb(struct bpb *bpb);
-void dbg_console(struct bpb *bpb);
-
-#endif
diff --git a/firmware/test/fat/debug.c b/firmware/test/fat/main.c
index fa7ff8651a..ffe3dd8764 100644
--- a/firmware/test/fat/debug.c
+++ b/firmware/test/fat/main.c
@@ -4,6 +4,12 @@
 #include "fat.h"
 #include "ata.h"
 #include "debug.h"
+#include "disk.h"
+
+void dbg_dump_sector(int sec);
+void dbg_dump_buffer(unsigned char *buf);
+void dbg_print_bpb(struct bpb *bpb);
+void dbg_console(struct bpb *bpb);
 
 void dbg_dump_sector(int sec)
 {
@@ -189,3 +195,25 @@ void dbg_console(struct bpb* bpb)
         }
     }
 }
+
+int main(int argc, char *argv[])
+{
+    struct bpb bpb;
+    
+    if(ata_init()) {
+        DEBUGF("*** Warning! The disk is uninitialized\n");
+        return -1;
+    }
+    if (disk_init()) {
+        DEBUGF("*** Failed reading partitions\n");
+        return -1;
+    }
+
+    if(fat_mount(&bpb,part[0].start)) {
+        DEBUGF("*** Failed mounting fat\n");
+    }
+
+    dbg_console(&bpb);
+    return 0;
+}
+