From 4e7ee5b0d5ae9d737bb72766419d919b2eb0b1b4 Mon Sep 17 00:00:00 2001
From: Jack Humbert <jack.humb@gmail.com>
Date: Tue, 1 Aug 2017 16:45:33 -0400
Subject: [PATCH] start planning eeprom stuff

---
 tmk_core/common/eeconfig.c | 48 ++++++++++++++++++++++++++++---
 tmk_core/common/eeconfig.h | 58 ++++++++++++++++++++++++++++++++++++--
 2 files changed, 100 insertions(+), 6 deletions(-)

diff --git a/tmk_core/common/eeconfig.c b/tmk_core/common/eeconfig.c
index e2eb4a38e3d..0b98a027be9 100644
--- a/tmk_core/common/eeconfig.c
+++ b/tmk_core/common/eeconfig.c
@@ -5,7 +5,7 @@
 
 void eeconfig_init(void)
 {
-    eeprom_update_word(EECONFIG_MAGIC,          EECONFIG_MAGIC_NUMBER);
+    eeprom_update_word(EEPROM_SIGNATURE_ADDR,          EEPROM_SIGNATURE);
     eeprom_update_byte(EECONFIG_DEBUG,          0);
     eeprom_update_byte(EECONFIG_DEFAULT_LAYER,  0);
     eeprom_update_byte(EECONFIG_KEYMAP,         0);
@@ -24,19 +24,59 @@ void eeconfig_init(void)
 #endif
 }
 
+uint8_t eeprom_feature_location(eeprom_feature_t feature) {
+    uint8_t location = EEPROM_HEADER_SIZE;
+    if (feature == eeprom_debug)
+        return location;
+    location += sizeof(typeof(eeprom_debug));
+    if (feature == eeprom_default_layer)
+        return location;
+    location += sizeof(typeof(eeprom_default_layer));
+    if (feature == eeprom_keymap)
+        return location;
+    location += sizeof(typeof(eeprom_keymap));
+    if (feature == eeprom_mousekey_accel)
+        return location;
+    location += sizeof(typeof(eeprom_mousekey_accel));
+    #ifdef BACKLIGHT_ENABLE
+        if (feature == eeprom_backlight)
+            return location;
+        location += sizeof(typeof(eeprom_backlight));
+    #endif
+    #ifdef AUDIO_ENABLE
+        if (feature == eeprom_audio)
+            return location;
+        location += sizeof(typeof(eeprom_audio));
+    #endif
+    #ifdef RGBLIGHT_ENABLE
+        if (feature == eeprom_rgblight)
+            return location;
+        location += sizeof(typeof(eeprom_rgblight));
+    #endif
+    if (feature == eeprom_unicodemode)
+        return location;
+    location += sizeof(typeof(eeprom_unicodemode));
+    #ifdef STENO_ENABLE
+        if (feature == eeprom_stenomode)
+            return location;
+        location += sizeof(typeof(eeprom_stenomode));
+    #endif
+    return location;
+}
+
 void eeconfig_enable(void)
 {
-    eeprom_update_word(EECONFIG_MAGIC, EECONFIG_MAGIC_NUMBER);
+    eeprom_update_word(EEPROM_SIGNATURE_ADDR, EEPROM_SIGNATURE);
 }
 
 void eeconfig_disable(void)
 {
-    eeprom_update_word(EECONFIG_MAGIC, 0xFFFF);
+    eeprom_update_word(EEPROM_SIGNATURE_ADDR, 0xFFFF);
 }
 
 bool eeconfig_is_enabled(void)
 {
-    return (eeprom_read_word(EECONFIG_MAGIC) == EECONFIG_MAGIC_NUMBER);
+    return (eeprom_read_word(EEPROM_SIGNATURE_ADDR) == EEPROM_SIGNATURE);
 }
 
 uint8_t eeconfig_read_debug(void)      { return eeprom_read_byte(EECONFIG_DEBUG); }
diff --git a/tmk_core/common/eeconfig.h b/tmk_core/common/eeconfig.h
index ce60ca86615..ac81e7f0d73 100644
--- a/tmk_core/common/eeconfig.h
+++ b/tmk_core/common/eeconfig.h
@@ -21,8 +21,62 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <stdint.h>
 #include <stdbool.h>
 
-
-#define EECONFIG_MAGIC_NUMBER                       (uint16_t)0xFEED
+#define EEPROM_CONFIG_VERSION	1
+#define EEPROM_HEADER_SIZE		4
+
+#define EEPROM_SIGNATURE		(0xFEED - EEPROM_CONFIG_VERSION)
+#define EEPROM_SIGNATURE_ADDR	(uint16_t *)0
+
+#define EEPROM_ENABLED_FEATURES			eeprom_enabled_features
+#define EEPROM_ENABLED_FEATURES_ADDR	(uint16_t *)2
+
+enum eeprom_optional_features {
+	eeprom_backlight_option,
+	eeprom_audio_option,
+	eeprom_rgblight_option,
+	eeprom_stenomode_option,
+	eeprom_free_range_option
+};
+
+static const uint16_t eeprom_enabled_features =
+	#ifdef BACKLIGHT_ENABLE
+		(1 << eeprom_backlight_option) |
+	#endif
+	#ifdef AUDIO_ENABLE
+		(1 << eeprom_audio_option) |
+	#endif
+	#ifdef RGBLIGHT_ENABLE
+		(1 << eeprom_rgblight_option) |
+	#endif
+	#ifdef STENO_ENABLE
+		(1 << eeprom_stenomode_option) |
+	#endif
+	0;
+
+typedef enum eeprom_features {
+	eeprom_debug,
+	eeprom_default_layer,
+	eeprom_keymap,
+	eeprom_mousekey_accel,
+	eeprom_backlight,
+	eeprom_audio,
+	eeprom_rgblight,
+	eeprom_unicodemode,
+	eeprom_stenomode,
+	eeprom_free_range
+} eeprom_feature_t;
+
+typedef uint8_t eeprom_debug_t;
+typedef uint8_t eeprom_default_layer_t;
+typedef uint8_t eeprom_keymap_t;
+typedef uint8_t eeprom_mousekey_accel_t;
+typedef uint8_t eeprom_backlight_t;
+typedef uint8_t eeprom_audio_t;
+typedef uint32_t eeprom_rgblight_t;
+typedef uint8_t eeprom_unicodemode_t;
+typedef uint8_t eeprom_stenomode_t;
+
+#define typeof(n) n ## _t
 
 /* eeprom parameteter address */
 #define EECONFIG_MAGIC                              (uint16_t *)0