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This commit is contained in:
Pokechu22 2022-08-09 12:22:56 -07:00
parent 25e31d121b
commit 2ef84a46db
1 changed files with 91 additions and 100 deletions
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191
Source/Core/Core/HW/WII_IPC.cpp
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@ -287,119 +287,110 @@ void WiiIPC::GPIOOutChanged(u32 old_value_hex)
}
// I²C logic for the audio/video encoder (AVE)
if (true || m_gpio_dir[GPIO::AVE_SCL])
if (old_value[GPIO::AVE_SCL] && new_value[GPIO::AVE_SCL])
{
if (old_value[GPIO::AVE_SCL] && new_value[GPIO::AVE_SCL])
// Check for changes to SDA while the clock is high.
if (old_value[GPIO::AVE_SDA] && !new_value[GPIO::AVE_SDA])
{
// Check for changes to SDA while the clock is high. This only makes sense if the SDA pin is
// outbound.
if (true || m_gpio_dir[GPIO::AVE_SDA])
{
if (old_value[GPIO::AVE_SDA] && !new_value[GPIO::AVE_SDA])
{
DEBUG_LOG_FMT(WII_IPC, "AVE: Start I2C");
// SDA falling edge (now pulled low) while SCL is high indicates I²C start
i2c_state.active = true;
i2c_state.acknowledge = false;
i2c_state.bit_counter = 0;
i2c_state.read_i2c_address = false;
i2c_state.is_correct_i2c_address = false;
i2c_state.read_ave_address = false;
}
else if (!old_value[GPIO::AVE_SDA] && new_value[GPIO::AVE_SDA])
{
DEBUG_LOG_FMT(WII_IPC, "AVE: Stop I2C");
// SDA rising edge (now passive pullup) while SCL is high indicates I²C stop
i2c_state.active = false;
i2c_state.bit_counter = 0;
}
}
DEBUG_LOG_FMT(WII_IPC, "AVE: Start I2C");
// SDA falling edge (now pulled low) while SCL is high indicates I²C start
i2c_state.active = true;
i2c_state.acknowledge = false;
i2c_state.bit_counter = 0;
i2c_state.read_i2c_address = false;
i2c_state.is_correct_i2c_address = false;
i2c_state.read_ave_address = false;
}
else if (!old_value[GPIO::AVE_SCL] && new_value[GPIO::AVE_SCL])
else if (!old_value[GPIO::AVE_SDA] && new_value[GPIO::AVE_SDA])
{
// Clock changed from low to high; transfer a new bit.
if (i2c_state.active && (!i2c_state.read_i2c_address || i2c_state.is_correct_i2c_address))
DEBUG_LOG_FMT(WII_IPC, "AVE: Stop I2C");
// SDA rising edge (now passive pullup) while SCL is high indicates I²C stop
i2c_state.active = false;
i2c_state.bit_counter = 0;
}
}
else if (!old_value[GPIO::AVE_SCL] && new_value[GPIO::AVE_SCL])
{
// Clock changed from low to high; transfer a new bit.
if (i2c_state.active && (!i2c_state.read_i2c_address || i2c_state.is_correct_i2c_address))
{
if (i2c_state.bit_counter == 9)
{
if (i2c_state.bit_counter == 9)
// Note: 9 not 8, as an extra clock is spent for acknowleding
i2c_state.acknowledge = false;
i2c_state.current_byte = 0;
i2c_state.bit_counter = 0;
}
// Rising edge: a new bit
if (i2c_state.bit_counter < 8)
{
i2c_state.current_byte <<= 1;
if (new_value[GPIO::AVE_SDA])
i2c_state.current_byte |= 1;
}
if (i2c_state.bit_counter == 8)
{
i2c_state.acknowledge = true;
DEBUG_LOG_FMT(WII_IPC, "AVE: New byte: {:02x}", i2c_state.current_byte);
if (!i2c_state.read_i2c_address)
{
// Note: 9 not 8, as an extra clock is spent for acknowleding
i2c_state.acknowledge = false;
i2c_state.current_byte = 0;
i2c_state.bit_counter = 0;
}
// Rising edge: a new bit
if (i2c_state.bit_counter < 8)
{
i2c_state.current_byte <<= 1;
if (new_value[GPIO::AVE_SDA])
i2c_state.current_byte |= 1;
}
if (i2c_state.bit_counter == 8)
{
i2c_state.acknowledge = true;
DEBUG_LOG_FMT(WII_IPC, "AVE: New byte: {:02x}", i2c_state.current_byte);
if (!i2c_state.read_i2c_address)
i2c_state.read_i2c_address = true;
if ((i2c_state.current_byte >> 1) == 0x70)
{
i2c_state.read_i2c_address = true;
if ((i2c_state.current_byte >> 1) == 0x70)
{
i2c_state.is_correct_i2c_address = true;
}
else
{
WARN_LOG_FMT(WII_IPC, "AVE: Wrong I2C address: {:02x}", i2c_state.current_byte >> 1);
Dolphin_Debugger::PrintCallstack(Core::CPUThreadGuard(m_system),
Common::Log::LogType::WII_IPC,
Common::Log::LogLevel::LINFO);
i2c_state.acknowledge = false;
i2c_state.is_correct_i2c_address = false;
}
if ((i2c_state.current_byte & 1) == 0)
{
i2c_state.is_read = false;
}
else
{
WARN_LOG_FMT(WII_IPC, "AVE: Reads aren't implemented yet");
i2c_state.is_read = true;
i2c_state.acknowledge = false; // until reads are implemented
}
}
else if (!i2c_state.read_ave_address)
{
i2c_state.read_ave_address = true;
i2c_state.current_address = i2c_state.current_byte;
DEBUG_LOG_FMT(WII_IPC, "AVE address: {:02x} ({})", i2c_state.current_address,
GetAVERegisterName(i2c_state.current_address));
i2c_state.is_correct_i2c_address = true;
}
else
{
// This is always inbounds, as we're indexing with a u8 and the struct is 0x100 bytes
const u8 old_ave_value = reinterpret_cast<u8*>(&ave_state)[i2c_state.current_address];
reinterpret_cast<u8*>(&ave_state)[i2c_state.current_address] = i2c_state.current_byte;
if (old_ave_value != i2c_state.current_byte)
{
INFO_LOG_FMT(WII_IPC, "AVE: Wrote {:02x} to {:02x} ({})", i2c_state.current_byte,
i2c_state.current_address,
GetAVERegisterName(i2c_state.current_address));
}
else
{
DEBUG_LOG_FMT(WII_IPC, "AVE: Wrote {:02x} to {:02x} ({})", i2c_state.current_byte,
i2c_state.current_address,
GetAVERegisterName(i2c_state.current_address));
}
i2c_state.current_address++;
WARN_LOG_FMT(WII_IPC, "AVE: Wrong I2C address: {:02x}", i2c_state.current_byte >> 1);
Dolphin_Debugger::PrintCallstack(Core::CPUThreadGuard(m_system),
Common::Log::LogType::WII_IPC,
Common::Log::LogLevel::LINFO);
i2c_state.acknowledge = false;
i2c_state.is_correct_i2c_address = false;
}
if ((i2c_state.current_byte & 1) == 0)
{
i2c_state.is_read = false;
}
else
{
WARN_LOG_FMT(WII_IPC, "AVE: Reads aren't implemented yet");
i2c_state.is_read = true;
i2c_state.acknowledge = false; // until reads are implemented
}
}
i2c_state.bit_counter++;
else if (!i2c_state.read_ave_address)
{
i2c_state.read_ave_address = true;
i2c_state.current_address = i2c_state.current_byte;
DEBUG_LOG_FMT(WII_IPC, "AVE address: {:02x} ({})", i2c_state.current_address,
GetAVERegisterName(i2c_state.current_address));
}
else
{
// This is always inbounds, as we're indexing with a u8 and the struct is 0x100 bytes
const u8 old_ave_value = reinterpret_cast<u8*>(&ave_state)[i2c_state.current_address];
reinterpret_cast<u8*>(&ave_state)[i2c_state.current_address] = i2c_state.current_byte;
if (old_ave_value != i2c_state.current_byte)
{
INFO_LOG_FMT(WII_IPC, "AVE: Wrote {:02x} to {:02x} ({})", i2c_state.current_byte,
i2c_state.current_address, GetAVERegisterName(i2c_state.current_address));
}
else
{
DEBUG_LOG_FMT(WII_IPC, "AVE: Wrote {:02x} to {:02x} ({})", i2c_state.current_byte,
i2c_state.current_address, GetAVERegisterName(i2c_state.current_address));
}
i2c_state.current_address++;
}
}
i2c_state.bit_counter++;
}
}