Initial support and use for EEPROM memory on H120 & H140 players when

Rockbox firmware has been flashed over original firmware (not yet
possible to do). Dircache & tagcache serialization for fast bootup
without the need to scan disk when Rockbox is in flash.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10464 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 116 insertions, 0 deletions

diff --git a/firmware/eeprom_settings.c b/firmware/eeprom_settings.c
new file mode 100644
index 0000000000..43f519d3fa
--- /dev/null
+++ b/firmware/eeprom_settings.c
@@ -0,0 +1,116 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 by Miika Pekkarinen
+ *
+ * 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 "eeprom_settings.h"
+#include "eeprom_24cxx.h"
+#include "crc32.h"
+
+#include "string.h"
+#include "logf.h"
+
+struct eeprom_settings firmware_settings;
+
+static void reset_config(void)
+{
+    memset(&firmware_settings, 0, sizeof(struct eeprom_settings));
+    firmware_settings.version = EEPROM_SETTINGS_VERSION;
+    firmware_settings.initialized = true;
+    firmware_settings.boot_disk = false;
+    firmware_settings.bl_version = 0;
+}
+
+bool eeprom_settings_init(void)
+{
+    bool ret;
+    uint32_t sum;
+    
+    eeprom_24cxx_init();
+    
+    /* Check if player has been flashed. */
+    if (!detect_flashed_rockbox())
+    {
+        memset(&firmware_settings, 0, sizeof(struct eeprom_settings));
+        firmware_settings.initialized = false;
+        logf("Rockbox in flash is required");
+        return false;
+    }
+    
+    ret = eeprom_24cxx_read(0, &firmware_settings, 
+                            sizeof(struct eeprom_settings));
+    
+    if (!ret)
+    {
+        memset(&firmware_settings, 0, sizeof(struct eeprom_settings));
+        firmware_settings.initialized = false;
+        return false;
+    }
+    
+    sum = crc_32(&firmware_settings, sizeof(struct eeprom_settings)-4,
+                 0xffffffff);
+    
+    if (firmware_settings.checksum != sum)
+    {
+        logf("Checksum mismatch");
+        reset_config();
+        return true;
+    }
+    
+    if (firmware_settings.version != EEPROM_SETTINGS_VERSION)
+    {
+        logf("Version mismatch");
+        reset_config();
+        return true;
+    }
+    
+#ifndef BOOTLOADER
+    if (firmware_settings.bl_version < EEPROM_SETTINGS_BL_MINVER)
+    {
+        logf("Too old bootloader: %d", firmware_settings.bl_version);
+        reset_config();
+        return true;
+    }
+#endif
+    
+    return true;
+}
+
+bool eeprom_settings_store(void)
+{
+    bool ret;
+    uint32_t sum;
+    
+    if (!firmware_settings.initialized || !detect_flashed_rockbox())
+    {
+        logf("Rockbox in flash is required");
+        return false;
+    }
+    
+    /* Update the checksum. */
+    sum = crc_32(&firmware_settings, sizeof(struct eeprom_settings)-4,
+                 0xffffffff);
+    firmware_settings.checksum = sum;
+    ret = eeprom_24cxx_write(0, &firmware_settings,
+                             sizeof(struct eeprom_settings));
+    
+    if (!ret)
+        firmware_settings.initialized = false;
+    
+    return ret;
+}
+