From 9faa95af562091644986d3ccf47500c7d65c74e6 Mon Sep 17 00:00:00 2001
From: Maschell <Maschell@gmx.de>
Date: Sat, 29 Jan 2022 18:42:45 +0100
Subject: [PATCH] Add support for reading the seeprom.

---
 Makefile          |  2 +-
 include/iosuhax.h |  2 ++
 source/iosuhax.c  | 31 +++++++++++++++++++++++++++++++
 3 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 03af789..c5b9f50 100644
--- a/Makefile
+++ b/Makefile
@@ -11,7 +11,7 @@ TOPDIR ?= $(CURDIR)
 include $(DEVKITPRO)/wut/share/wut_rules
 
 export VER_MAJOR	:=	1
-export VER_MINOR	:=	0
+export VER_MINOR	:=	1
 export VER_PATCH	:=	0
 
 VERSION	:=	$(VER_MAJOR).$(VER_MINOR).$(VER_PATCH)
diff --git a/include/iosuhax.h b/include/iosuhax.h
index b3a2559..82c1e9e 100644
--- a/include/iosuhax.h
+++ b/include/iosuhax.h
@@ -72,6 +72,8 @@ int IOSUHAX_kern_read32(uint32_t address, uint32_t *out_buffer, uint32_t count);
 
 int IOSUHAX_read_otp(uint8_t * out_buffer, uint32_t size);
 
+int IOSUHAX_read_seeprom(uint8_t * out_buffer, uint32_t offset, uint32_t size);
+
 int IOSUHAX_ODM_GetDiscKey(uint8_t * discKey);
 
 int IOSUHAX_SVC(uint32_t svc_id, uint32_t *args, uint32_t arg_cnt);
diff --git a/source/iosuhax.c b/source/iosuhax.c
index 66ea8fb..3026329 100644
--- a/source/iosuhax.c
+++ b/source/iosuhax.c
@@ -199,6 +199,37 @@ int IOSUHAX_read_otp(uint8_t * out_buffer, uint32_t size) {
     return res;
 }
 
+extern int bspRead(const char*, uint32_t, const char*, uint32_t, uint16_t*);
+
+int IOSUHAX_read_seeprom(uint8_t * out_buffer, uint32_t offset, uint32_t size) {
+    if(out_buffer == NULL || offset > 0x200 || offset & 0x01) {
+        return -1;
+    }    
+
+    uint32_t sizeInShorts = size >> 1;
+    uint32_t offsetInShorts = offset >> 1;
+    int32_t maxReadCount = 0x100 - offsetInShorts;
+
+    if(maxReadCount <= 0){
+        return 0;
+    }
+
+    uint32_t count = sizeInShorts > maxReadCount ? maxReadCount : sizeInShorts;
+    uint16_t *ptr = (uint16_t *) out_buffer;  
+
+    int res = 0;
+
+    for(int i = 0; i < count; i++) {
+        if(bspRead("EE", offsetInShorts + i, "access", 2, ptr) != 0) {
+            return -2;
+        }
+        res += 2;
+        ptr++;
+    }
+
+    return res;
+}
+
 int IOSUHAX_kern_read32(uint32_t address, uint32_t *out_buffer, uint32_t count) {
     if (iosuhaxHandle < 0)
         return iosuhaxHandle;