From c12e87d88168f043020a4891adb6da2c960f21b2 Mon Sep 17 00:00:00 2001
From: Jens Arnold <amiconn@rockbox.org>
Date: Tue, 28 Sep 2004 18:09:10 +0000
Subject: [PATCH] The config sector number is now calculated from the lowest
 partition start sector. Needed for disks with sectors_per_track < 63, e.g.
 flash cards.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5124 a1c6a512-1295-4272-9138-f99709370657
---
 apps/main.c     |  6 ++++--
 apps/settings.c | 38 ++++++++++++++++++++++++++++++++++----
 apps/settings.h |  1 +
 3 files changed, 39 insertions(+), 6 deletions(-)

diff --git a/apps/main.c b/apps/main.c
index 1a163ebd72..38bbd71177 100644
--- a/apps/main.c
+++ b/apps/main.c
@@ -79,6 +79,7 @@ void init(void)
     font_init();
     show_logo();
     settings_reset();
+    settings_calc_config_sector();
     settings_load(SETTINGS_ALL);
     settings_apply();
     sleep(HZ/2);
@@ -224,11 +225,12 @@ void init(void)
         }
     }
 
+    settings_calc_config_sector();
     settings_load(SETTINGS_ALL);
     settings_apply();
-    
+
     status_init();
-    playlist_init();
+    playlist_init(); 
     tree_init();
 
     /* No buffer allocation (see buffer.c) may take place after the call to
diff --git a/apps/settings.c b/apps/settings.c
index 708a38b678..bb8deb0cb4 100644
--- a/apps/settings.c
+++ b/apps/settings.c
@@ -82,6 +82,7 @@ const char rec_base_directory[] = REC_BASE_DIR;
 #endif
 
 long lasttime = 0;
+static int config_sector = 0;  /* mark uninitialized */
 static unsigned char config_block[CONFIG_BLOCK_SIZE];
 
 
@@ -481,8 +482,8 @@ static int save_config_buffer( void )
 
 #endif
 
-    if (fat_startsector() != 0)
-        ata_delayed_write( 61, config_block);
+    if (config_sector != 0)
+        ata_delayed_write( config_sector, config_block);
     else
         return -1;
 
@@ -502,8 +503,8 @@ static int load_config_buffer(int which)
 
     if (which & SETTINGS_HD)
     {
-        if (fat_startsector() != 0) {
-            ata_read_sectors( 61, 1,  config_block);
+        if (config_sector != 0) {
+            ata_read_sectors( config_sector, 1,  config_block);
 
             /* calculate the checksum, check it and the header */
             chksum = calculate_config_checksum(config_block);
@@ -601,6 +602,35 @@ static void save_bit_table(const struct bit_entry* p_table, int count, int bitst
         curr_bit); /* = position after last element */
 }
 
+/*
+ * figure out the config sector from the partition table and the
+ * mounted file system 
+ */
+void settings_calc_config_sector(void)
+{
+#ifdef SIMULATOR
+    config_sector = 61;
+#else
+    int i, partition_start;
+    int sector = 0;
+
+    if (fat_startsector != 0)    /* There is a partition table */
+    {
+        sector = 61;
+        for (i = 0; i < 4; i++)
+        {
+            partition_start = disk_partinfo(i)->start;
+            if (partition_start != 0 && (partition_start - 2) < sector)
+                sector = partition_start - 2;
+        }
+        if (sector < 0)
+            sector = 0;
+    }
+    
+    splash(HZ, true, "CfgSec: %d", sector);
+    config_sector = sector;
+#endif
+}
 
 /*
  * persist all runtime user settings to disk or RTC RAM
diff --git a/apps/settings.h b/apps/settings.h
index 0af466c5f7..aa408ea2cc 100644
--- a/apps/settings.h
+++ b/apps/settings.h
@@ -281,6 +281,7 @@ struct opt_items {
 
 /* prototypes */
 
+void settings_calc_config_sector(void);
 int settings_save(void);
 void settings_load(int which);
 void settings_reset(void);