From 0106406aff0f7aada992a9f27b68a20deafbc5e4 Mon Sep 17 00:00:00 2001
From: StapleButter <thetotalworm@gmail.com>
Date: Sat, 5 Aug 2017 19:13:55 +0200
Subject: * allow 128KB firmwares (DSi/3DS dumps) * document firmware sizes
better
---
src/SPI.cpp | 40 ++++++++++++++++++++++++++++++++--------
1 file changed, 32 insertions(+), 8 deletions(-)
(limited to 'src')
diff --git a/src/SPI.cpp b/src/SPI.cpp
index 9d00b58..21f9ccb 100644
--- a/src/SPI.cpp
+++ b/src/SPI.cpp
@@ -100,10 +100,23 @@ void Reset()
fseek(f, 0, SEEK_END);
FirmwareLength = (u32)ftell(f);
- if (FirmwareLength != 0x40000 && FirmwareLength != 0x80000)
+ if (FirmwareLength != 0x20000 && FirmwareLength != 0x40000 && FirmwareLength != 0x80000)
{
- printf("Bad firmware size %d, assuming 256K\n", FirmwareLength);
- FirmwareLength = 0x40000;
+ printf("Bad firmware size %d, ", FirmwareLength);
+
+ // pick the nearest power-of-two length
+ FirmwareLength |= (FirmwareLength >> 1);
+ FirmwareLength |= (FirmwareLength >> 2);
+ FirmwareLength |= (FirmwareLength >> 4);
+ FirmwareLength |= (FirmwareLength >> 8);
+ FirmwareLength |= (FirmwareLength >> 16);
+ FirmwareLength++;
+
+ // ensure it's a sane length
+ if (FirmwareLength > 0x80000) FirmwareLength = 0x80000;
+ else if (FirmwareLength < 0x20000) FirmwareLength = 0x20000;
+
+ printf("assuming %d\n", FirmwareLength);
}
Firmware = new u8[FirmwareLength];
@@ -352,7 +365,7 @@ u8 Read()
}
void Write(u8 val, u32 hold)
-{
+{printf("SPI powerman %02X %d\n", val, hold?1:0);
if (!hold)
{
Hold = 0;
@@ -369,15 +382,26 @@ void Write(u8 val, u32 hold)
if (DataPos == 1)
{
+ u32 regid = Index & 0x07;
+
if (Index & 0x80)
{
- Data = Registers[Index & 0x07];
+ Data = Registers[regid];
}
else
{
- Registers[Index & 0x07] =
- (Registers[Index & 0x07] & ~RegMasks[Index & 0x07]) |
- (val & RegMasks[Index & 0x07]);
+ Registers[regid] = (Registers[regid] & ~RegMasks[regid]) | (val & RegMasks[regid]);
+
+ switch (regid)
+ {
+ case 0:
+ if (val & 0x40) printf("DS shutdown\n");
+ printf("power %02X\n", val);
+ break;
+ case 4:
+ printf("brightness %02X\n", val);
+ break;
+ }
}
}
else
--
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