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melonDS/src/Wifi.cpp

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/*
Copyright 2016-2024 melonDS team
This file is part of melonDS.
melonDS is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with melonDS. If not, see http://www.gnu.org/licenses/.
*/
#include <stdio.h>
#include <string.h>
#include "NDS.h"
#include "SPI.h"
#include "Wifi.h"
#include "WifiAP.h"
#include "Platform.h"
namespace melonDS
{
using Platform::Log;
using Platform::LogLevel;
//#define WIFI_LOG printf
#define WIFI_LOG(...) {}
#define PRINT_MAC(pf, mac) Log(LogLevel::Debug, "%s: %02X:%02X:%02X:%02X:%02X:%02X\n", pf, (mac)[0], (mac)[1], (mac)[2], (mac)[3], (mac)[4], (mac)[5]);
#define IOPORT(x) IO[(x)>>1]
#define IOPORT8(x) ((u8*)IO)[x]
// destination MACs for MP frames
const u8 Wifi::MPCmdMAC[6] = {0x03, 0x09, 0xBF, 0x00, 0x00, 0x00};
const u8 Wifi::MPReplyMAC[6] = {0x03, 0x09, 0xBF, 0x00, 0x00, 0x10};
const u8 Wifi::MPAckMAC[6] = {0x03, 0x09, 0xBF, 0x00, 0x00, 0x03};
// multiplayer host TX sequence:
// 1. preamble
// 2. IRQ7
// 3. send data
// 4. optional IRQ1
// 5. wait for client replies (duration: 16 + ((10 * CMD_REPLYTIME) * numclients) + ack preamble (96))
// 6. IRQ7
// 7. send ack (32 bytes)
// 8. optional IRQ1, along with IRQ12 if the transfer was successful or if
// there's no time left for a retry
//
// if the transfer has to be retried (for example, didn't get replies from all clients)
// and there is time, it repeats the sequence
//
// if there isn't enough time left on CMD_COUNT, IRQ12 is triggered alone when
// CMD_COUNT is 10, and the packet txheader[0] is set to 5
//
// RFSTATUS values:
// 0 = initial
// 1 = waiting for incoming packets
// 2 = switching from RX to TX
// 3 = TX
// 4 = switching from TX to RX
// 5 = MP host data sent, waiting for replies (RFPINS=0x0084)
// 6 = RX
// 7 = switching from RX reply to TX ack
// 8 = MP client sending reply, MP host sending ack (RFPINS=0x0046)
// 9 = idle
// wifi TODO:
// * RXSTAT
// * TX errors (if applicable)
bool MACEqual(const u8* a, const u8* b)
{
return (*(u32*)&a[0] == *(u32*)&b[0]) && (*(u16*)&a[4] == *(u16*)&b[4]);
}
bool MACIsBroadcast(const u8* a)
{
return (*(u32*)&a[0] == 0xFFFFFFFF) && (*(u16*)&a[4] == 0xFFFF);
}
Wifi::Wifi(melonDS::NDS& nds) : NDS(nds)
{
NDS.RegisterEventFunc(Event_Wifi, 0, MemberEventFunc(Wifi, USTimer));
WifiAP = new class WifiAP(this, NDS.UserData);
}
Wifi::~Wifi()
{
delete WifiAP; WifiAP = nullptr;
NDS.UnregisterEventFunc(Event_Wifi, 0);
}
void Wifi::Reset()
{
memset(RAM, 0, 0x2000);
memset(IO, 0, 0x1000);
Enabled = false;
PowerOn = false;
Random = 1;
memset(BBRegs, 0, 0x100);
memset(BBRegsRO, 0, 0x100);
#define BBREG_FIXED(id, val) BBRegs[id] = val; BBRegsRO[id] = 1;
BBREG_FIXED(0x00, 0x6D);
BBREG_FIXED(0x0D, 0x00);
BBREG_FIXED(0x0E, 0x00);
BBREG_FIXED(0x0F, 0x00);
BBREG_FIXED(0x10, 0x00);
BBREG_FIXED(0x11, 0x00);
BBREG_FIXED(0x12, 0x00);
BBREG_FIXED(0x16, 0x00);
BBREG_FIXED(0x17, 0x00);
BBREG_FIXED(0x18, 0x00);
BBREG_FIXED(0x19, 0x00);
BBREG_FIXED(0x1A, 0x00);
BBREG_FIXED(0x27, 0x00);
BBREG_FIXED(0x4D, 0x00); // 00 or BF
BBREG_FIXED(0x5D, 0x01);
BBREG_FIXED(0x5E, 0x00);
BBREG_FIXED(0x5F, 0x00);
BBREG_FIXED(0x60, 0x00);
BBREG_FIXED(0x61, 0x00);
BBREG_FIXED(0x64, 0xFF); // FF or 3F
BBREG_FIXED(0x66, 0x00);
for (int i = 0x69; i < 0x100; i++)
{
BBREG_FIXED(i, 0x00);
}
#undef BBREG_FIXED
const Firmware& fw = NDS.SPI.GetFirmware();
const auto& fwheader = fw.GetHeader();
RFVersion = fwheader.RFChipType;
memset(RFRegs, 0, 4*0x40);
// load channel index/data from the firmware
// the current channel will be determined by RF settings
// so we compare the two 'most important' RF registers to these values to figure out which channel is selected
if (RFVersion == 3)
{
RFChannelIndex[0] = fwheader.Type3Config.RFIndex1;
RFChannelIndex[1] = fwheader.Type3Config.RFIndex2;
for (int i = 0; i < 14; i++)
{
RFChannelData[i][0] = fwheader.Type3Config.RFData1[i];
RFChannelData[i][1] = fwheader.Type3Config.RFData2[i];
}
}
else
{
RFChannelIndex[0] = fwheader.Type2Config.InitialRF56Values[2] >> 2;
RFChannelIndex[1] = fwheader.Type2Config.InitialRF56Values[5] >> 2;
for (int i = 0; i < 14; i++)
{
RFChannelData[i][0] = fwheader.Type2Config.InitialRF56Values[i*6 + 0] |
(fwheader.Type2Config.InitialRF56Values[i*6 + 1] << 8) |
((fwheader.Type2Config.InitialRF56Values[i*6 + 2] & 0x03) << 16);
RFChannelData[i][1] = fwheader.Type2Config.InitialRF56Values[i*6 + 3] |
(fwheader.Type2Config.InitialRF56Values[i*6 + 4] << 8) |
((fwheader.Type2Config.InitialRF56Values[i*6 + 5] & 0x03) << 16);
}
}
CurChannel = 0;
Firmware::FirmwareConsoleType console = fwheader.ConsoleType;
if (console == Firmware::FirmwareConsoleType::DS)
IOPORT(0x000) = 0x1440;
else if (console == Firmware::FirmwareConsoleType::DSLite)
IOPORT(0x000) = 0xC340;
else if (NDS.ConsoleType == 1 && console == Firmware::FirmwareConsoleType::DSi)
IOPORT(0x000) = 0xC340; // DSi has the modern DS-wifi variant
else
{
Log(LogLevel::Warn, "wifi: unknown console type %02X\n", console);
IOPORT(0x000) = 0x1440;
}
memset(&IOPORT(0x018), 0xFF, 6);
memset(&IOPORT(0x020), 0xFF, 6);
// TODO: find out what the initial values are
IOPORT(W_PowerUS) = 0x0001;
//IOPORT(W_BeaconInterval) = 100;
USTimestamp = 0;
USCounter = 0;
USCompare = 0;
BlockBeaconIRQ14 = false;
memset(TXSlots, 0, sizeof(TXSlots));
memset(TXBuffer, 0, sizeof(TXBuffer));
ComStatus = 0;
TXCurSlot = -1;
RXCounter = 0;
memset(RXBuffer, 0, sizeof(RXBuffer));
RXBufferPtr = 0;
RXTime = 0;
RXHalfwordTimeMask = 0xFFFFFFFF;
MPReplyTimer = 0;
MPClientMask = 0;
MPClientFail = 0;
memset(MPClientReplies, 0, sizeof(MPClientReplies));
MPLastSeqno = 0xFFFF;
CmdCounter = 0;
USUntilPowerOn = 0;
IsMP = false;
IsMPClient = false;
NextSync = 0;
RXTimestamp = 0;
WifiAP->Reset();
}
void Wifi::DoSavestate(Savestate* file)
{
file->Section("WIFI");
// berp.
// not sure we're saving enough shit at all there.
// also: savestate and wifi can't fucking work together!!
// or it can but you would be disconnected
file->VarArray(RAM, 0x2000);
file->VarArray(IO, 0x1000);
file->Bool32(&Enabled);
file->Bool32(&PowerOn);
file->Var16(&Random);
file->Var32((u32*)&TimerError);
file->VarArray(BBRegs, 0x100);
file->VarArray(BBRegsRO, 0x100);
file->Var8(&RFVersion);
file->VarArray(RFRegs, 4*0x40);
file->Var32((u32*)&CurChannel);
file->Var64(&USCounter);
file->Var64(&USCompare);
file->Bool32(&BlockBeaconIRQ14);
file->Var32(&CmdCounter);
file->Var64(&USTimestamp);
for (int i = 0; i < 6; i++)
{
TXSlot* slot = &TXSlots[i];
file->Bool32(&slot->Valid);
file->Var16(&slot->Addr);
file->Var16(&slot->Length);
file->Var8(&slot->Rate);
file->Var8(&slot->CurPhase);
file->Var32((u32*)&slot->CurPhaseTime);
file->Var32(&slot->HalfwordTimeMask);
}
file->VarArray(TXBuffer, sizeof(TXBuffer));
file->VarArray(RXBuffer, sizeof(RXBuffer));
file->Var32(&RXBufferPtr);
file->Var32((u32*)&RXTime);
file->Var32(&RXHalfwordTimeMask);
file->Var32(&ComStatus);
file->Var32(&TXCurSlot);
file->Var32(&RXCounter);
file->Var32((u32*)&MPReplyTimer);
file->Var16(&MPClientMask);
file->Var16(&MPClientFail);
file->VarArray(MPClientReplies, sizeof(MPClientReplies));
file->Var16(&MPLastSeqno);
file->Var32((u32*)&USUntilPowerOn);
file->Bool32(&IsMP);
file->Bool32(&IsMPClient);
file->Var64(&NextSync);
file->Var64(&RXTimestamp);
}
void Wifi::ScheduleTimer(bool first)
{
if (first) TimerError = 0;
s32 cycles = 33513982 * kTimerInterval;
cycles -= TimerError;
s32 delay = (cycles + 999999) / 1000000;
TimerError = (delay * 1000000) - cycles;
NDS.ScheduleEvent(Event_Wifi, !first, delay, 0, 0);
}
void Wifi::UpdatePowerOn()
{
bool on = Enabled;
if (NDS.ConsoleType == 1)
{
// TODO for DSi:
// * W_POWER_US doesn't work (atleast on DWM-W024)
// * other registers like GPIO_WIFI may also control wifi power/clock
// * turning wifi off via POWCNT2 while sending breaks further attempts at sending frames
}
else
{
on = on && ((IOPORT(W_PowerUS) & 0x1) == 0);
}
if (on == PowerOn)
return;
PowerOn = on;
if (on)
{
Log(LogLevel::Debug, "WIFI: ON\n");
ScheduleTimer(true);
Platform::MP_Begin(NDS.UserData);
}
else
{
Log(LogLevel::Debug, "WIFI: OFF\n");
NDS.CancelEvent(Event_Wifi);
Platform::MP_End(NDS.UserData);
}
}
void Wifi::SetPowerCnt(u32 val)
{
Enabled = val & (1<<1);
UpdatePowerOn();
}
void Wifi::CheckIRQ(u16 oldflags)
{
u16 newflags = IOPORT(W_IF) & IOPORT(W_IE);
if ((oldflags == 0) && (newflags != 0))
NDS.SetIRQ(1, IRQ_Wifi);
}
void Wifi::SetIRQ(u32 irq)
{
u16 oldflags = IOPORT(W_IF) & IOPORT(W_IE);
IOPORT(W_IF) |= (1<<irq);
CheckIRQ(oldflags);
}
void Wifi::SetIRQ13()
{
SetIRQ(13);
if ((IOPORT(W_ModeWEP) & 0x7) != 3)
{
if (!(IOPORT(W_PowerTX) & (1<<1)))
{
UpdatePowerStatus(-1);
}
}
}
void Wifi::SetIRQ14(int source) // 0=USCOMPARE 1=BEACONCOUNT 2=forced
{
// CHECKME: is this also done for USCOMPARE IRQ?
if (source != 2)
IOPORT(W_BeaconCount1) = IOPORT(W_BeaconInterval);
if (BlockBeaconIRQ14 && source == 1)
return;
if (!(IOPORT(W_USCompareCnt) & 0x0001))
return;
SetIRQ(14);
if (source == 2)
Log(LogLevel::Debug, "wifi: weird forced IRQ14\n");
IOPORT(W_BeaconCount2) = 0xFFFF;
IOPORT(W_TXReqRead) &= 0xFFF2;
if (IOPORT(W_TXSlotBeacon) & 0x8000)
{
StartTX_Beacon();
}
if (IOPORT(W_ListenCount) == 0)
IOPORT(W_ListenCount) = IOPORT(W_ListenInterval);
IOPORT(W_ListenCount)--;
}
void Wifi::SetIRQ15()
{
SetIRQ(15);
// unlike auto sleep, auto wakeup works under all power management modes
if (IOPORT(W_PowerTX) & (1<<0))
{
UpdatePowerStatus(1);
}
}
void Wifi::SetStatus(u32 status)
{
// TODO, eventually: states 2/4/7
u16 rfpins[10] = {0x04, 0x84, 0, 0x46, 0, 0x84, 0x87, 0, 0x46, 0x04};
IOPORT(W_RFStatus) = status;
IOPORT(W_RFPins) = rfpins[status];
}
void Wifi::UpdatePowerStatus(int power) // 1=on 0=no change -1=off
{
// TRANSCEIVER POWER MANAGEMENT
//
// * W_PowerForce overrides all else
// * W_ModeReset bit0 forcibly turns off the transceiver when cleared
// * power is normally turned on or off either by IRQ15/IRQ13 or by W_PowerState
// depending on the power management mode selected in W_ModeWEP
// * W_PowerDownCtrl controls how deep a regular power-down is
int curflags = 0;
if (IOPORT(W_TRXPower) == 1) curflags |= 1;
if (!(IOPORT(W_PowerState) & (1<<9))) curflags |= 2;
int reqflags = curflags;
if (IOPORT(W_PowerForce) & (1<<15))
{
reqflags = (IOPORT(W_PowerForce) & (1<<0)) ? 0 : 3;
}
else if (!(IOPORT(W_ModeReset) & (1<<0)))
{
reqflags = 0;
}
else
{
if (power == 0)
{
if ((IOPORT(W_PowerState) & 0x0202) == 0x0202)
power = 1;
else if ((IOPORT(W_PowerState) & 0x0201) == 0x0001)
power = -1;
}
// W_PowerDownCtrl:
// * bit 0 inhibits a regular power-down
// * bit 1 forces a wakeup, atleast partial
if ((power == -1) && (IOPORT(W_PowerDownCtrl) & (1<<0)))
power = 0;
/*if (power == 1)
reqflags = 3;
else if (power == -1)
reqflags = IOPORT(W_PowerDownCtrl);
else if (IOPORT(W_PowerDownCtrl) & (1<<1))
reqflags = (curflags == 3) ? 3 : IOPORT(W_PowerDownCtrl);*/
// TODO: support partial power statuses (W_PowerDownCtrl=1 or 2)
if (power == 1)
reqflags = 3;
else if (power == -1)
reqflags = IOPORT(W_PowerDownCtrl) ? 3 : 0;
else if (IOPORT(W_PowerDownCtrl) & (1<<1))
reqflags = 3;
}
if (reqflags == curflags)
return;
if (reqflags & 1)
{
if (!(curflags & 1))
{
IOPORT(W_TRXPower) = 1;
SetStatus(1);
}
}
else
{
// signal the transceiver is going to turn off (checkme)
IOPORT(W_TRXPower) = 2;
if (!ComStatus)
{
IOPORT(W_TRXPower) = 0;
SetStatus(9);
}
}
if (reqflags & 2)
{
// power on
IOPORT(W_PowerState) |= (1<<8);
if ((!(curflags & 2)) && (USUntilPowerOn == 0))
{
Log(LogLevel::Debug, "wifi: TRX power ON\n");
USUntilPowerOn = -2048;
SetIRQ(11);
}
}
else
{
// power off
if (curflags & 2)
Log(LogLevel::Debug, "wifi: TRX power OFF\n");
IOPORT(W_PowerState) &= ~(1<<0);
IOPORT(W_PowerState) &= ~(1<<8);
IOPORT(W_PowerState) |= (1<<9);
USUntilPowerOn = 0;
}
}
int Wifi::PreambleLen(int rate) const
{
if (rate == 1) return 192;
if (IOPORT(W_Preamble) & 0x0004) return 96;
return 192;
}
u32 Wifi::NumClients(u16 bitmask) const
{
u32 ret = 0;
for (int i = 1; i < 16; i++)
{
if (bitmask & (1<<i)) ret++;
}
return ret;
}
void Wifi::IncrementTXCount(const TXSlot* slot)
{
u8 cnt = RAM[slot->Addr + 0x4];
if (cnt < 0xFF) cnt++;
*(u16*)&RAM[slot->Addr + 0x4] = cnt;
}
void Wifi::ReportMPReplyErrors(u16 clientfail)
{
// TODO: do these trigger any IRQ?
for (int i = 1; i < 16; i++)
{
if (!(clientfail & (1<<i)))
continue;
IOPORT8(W_CMDStat0 + i)++;
}
}
void Wifi::TXSendFrame(const TXSlot* slot, int num)
{
u32 noseqno = 0;
if (RAM[slot->Addr + 0x4])
{
noseqno = 2;
}
else
{
if (num == 1) noseqno = (IOPORT(W_TXSlotCmd) & 0x4000) ? 1:0;
}
if (!noseqno)
{
if (!(IOPORT(W_TXHeaderCnt) & (1<<2)))
*(u16*)&RAM[slot->Addr + 0xC + 22] = IOPORT(W_TXSeqNo) << 4;
IOPORT(W_TXSeqNo) = (IOPORT(W_TXSeqNo) + 1) & 0x0FFF;
}
u16 framectl = *(u16*)&RAM[slot->Addr + 0xC];
if (framectl & (1<<14))
{
// WEP frame
// TODO: what happens when sending a WEP frame while WEP processing is off?
// TODO: some form of actual WEP processing?
// for now we just set the WEP FCS to a nonzero value, because some games require it
if (IOPORT(W_WEPCnt) & (1<<15))
{
u32 wep_fcs = (slot->Addr + 0xC + slot->Length - 7) & ~0x1;
*(u32*)&RAM[wep_fcs] = 0x22334466;
}
}
int len = slot->Length;
if ((slot->Addr + len) > 0x1FF4)
len = 0x1FF4 - slot->Addr;
memcpy(TXBuffer, &RAM[slot->Addr], 12+len);
if (noseqno == 2)
*(u16*)&TXBuffer[0xC] |= (1<<11);
if (CurChannel == 0) return;
TXBuffer[9] = CurChannel;
switch (num)
{
case 0:
case 2:
case 3:
Platform::MP_SendPacket(TXBuffer, 12+len, USTimestamp, NDS.UserData);
if (!IsMP) WifiAP->SendPacket(TXBuffer, 12+len);
break;
case 1:
*(u16*)&TXBuffer[12 + 24+2] = MPClientMask;
Platform::MP_SendCmd(TXBuffer, 12+len, USTimestamp, NDS.UserData);
break;
case 5:
IncrementTXCount(slot);
Platform::MP_SendReply(TXBuffer, 12+len, USTimestamp, IOPORT(W_AIDLow), NDS.UserData);
break;
case 4:
*(u64*)&TXBuffer[0xC + 24] = USCounter;
Platform::MP_SendPacket(TXBuffer, 12+len, USTimestamp, NDS.UserData);
break;
}
}
void Wifi::StartTX_LocN(int nslot, int loc)
{
TXSlot* slot = &TXSlots[nslot];
if (IOPORT(W_TXSlotLoc1 + (loc*4)) & 0x7000)
Log(LogLevel::Warn, "wifi: unusual loc%d bits set %04X\n", loc, IOPORT(W_TXSlotLoc1 + (loc*4)));
slot->Valid = true;
slot->Addr = (IOPORT(W_TXSlotLoc1 + (loc*4)) & 0x0FFF) << 1;
slot->Length = *(u16*)&RAM[slot->Addr + 0xA] & 0x3FFF;
u8 rate = RAM[slot->Addr + 0x8];
if (rate == 0x14) slot->Rate = 2;
else slot->Rate = 1;
slot->CurPhase = 0;
slot->CurPhaseTime = PreambleLen(slot->Rate);
}
void Wifi::StartTX_Cmd()
{
TXSlot* slot = &TXSlots[1];
if (IOPORT(W_TXSlotCmd) & 0x3000)
Log(LogLevel::Warn,"wifi: !! unusual TXSLOT_CMD bits set %04X\n", IOPORT(W_TXSlotCmd));
slot->Valid = true;
slot->Addr = (IOPORT(W_TXSlotCmd) & 0x0FFF) << 1;
slot->Length = *(u16*)&RAM[slot->Addr + 0xA] & 0x3FFF;
u8 rate = RAM[slot->Addr + 0x8];
if (rate == 0x14) slot->Rate = 2;
else slot->Rate = 1;
MPClientMask = *(u16*)&RAM[slot->Addr + 12 + 24 + 2] & MPClientFail;
MPClientFail &= MPClientMask;
u32 duration = PreambleLen(slot->Rate) + (slot->Length * (slot->Rate==2 ? 4:8));
duration += 112 + ((10 + IOPORT(W_CmdReplyTime)) * NumClients(MPClientMask));
duration += (32 * (slot->Rate==2 ? 4:8));
if (CmdCounter > (duration + 100))
{
slot->CurPhase = 0;
slot->CurPhaseTime = PreambleLen(slot->Rate);
}
else
{
slot->CurPhase = 13;
slot->CurPhaseTime = CmdCounter - 100;
}
// starting a CMD transfer wakes up the transceiver automatically
UpdatePowerStatus(1);
}
void Wifi::StartTX_Beacon()
{
TXSlot* slot = &TXSlots[4];
slot->Valid = true;
slot->Addr = (IOPORT(W_TXSlotBeacon) & 0x0FFF) << 1;
slot->Length = *(u16*)&RAM[slot->Addr + 0xA] & 0x3FFF;
u8 rate = RAM[slot->Addr + 0x8];
if (rate == 0x14) slot->Rate = 2;
else slot->Rate = 1;
slot->CurPhase = 0;
slot->CurPhaseTime = PreambleLen(slot->Rate);
IOPORT(W_TXBusy) |= 0x0010;
}
void Wifi::FireTX()
{
if (!(IOPORT(W_RXCnt) & 0x8000))
return;
u16 txbusy = IOPORT(W_TXBusy);
u16 txreq = IOPORT(W_TXReqRead);
u16 txstart = 0;
if (IOPORT(W_TXSlotLoc1) & 0x8000) txstart |= 0x0001;
if (IOPORT(W_TXSlotCmd ) & 0x8000) txstart |= 0x0002;
if (IOPORT(W_TXSlotLoc2) & 0x8000) txstart |= 0x0004;
if (IOPORT(W_TXSlotLoc3) & 0x8000) txstart |= 0x0008;
txstart &= txreq;
txstart &= ~txbusy;
IOPORT(W_TXBusy) = txbusy | txstart;
if (txstart & 0x0008)
{
StartTX_LocN(3, 2);
return;
}
if (txstart & 0x0004)
{
StartTX_LocN(2, 1);
return;
}
if (txstart & 0x0002)
{
MPClientFail = 0xFFFE;
StartTX_Cmd();
return;
}
if (txstart & 0x0001)
{
StartTX_LocN(0, 0);
return;
}
}
void Wifi::SendMPDefaultReply()
{
u8 reply[12 + 28];
*(u16*)&reply[0xA] = 28; // length
// rate
//if (TXSlots[1].Rate == 2) reply[0x8] = 0x14;
//else reply[0x8] = 0xA;
// TODO
reply[0x8] = 0x14;
if (CurChannel == 0) return;
reply[0x9] = CurChannel;
*(u16*)&reply[0xC + 0x00] = 0x0158;
*(u16*)&reply[0xC + 0x02] = 0x00F0;//0; // TODO??
*(u16*)&reply[0xC + 0x04] = IOPORT(W_BSSID0);
*(u16*)&reply[0xC + 0x06] = IOPORT(W_BSSID1);
*(u16*)&reply[0xC + 0x08] = IOPORT(W_BSSID2);
*(u16*)&reply[0xC + 0x0A] = IOPORT(W_MACAddr0);
*(u16*)&reply[0xC + 0x0C] = IOPORT(W_MACAddr1);
*(u16*)&reply[0xC + 0x0E] = IOPORT(W_MACAddr2);
*(u16*)&reply[0xC + 0x10] = 0x0903;
*(u16*)&reply[0xC + 0x12] = 0x00BF;
*(u16*)&reply[0xC + 0x14] = 0x1000;
*(u16*)&reply[0xC + 0x16] = IOPORT(W_TXSeqNo) << 4;
*(u32*)&reply[0xC + 0x18] = 0;
int txlen = Platform::MP_SendReply(reply, 12+28, USTimestamp, IOPORT(W_AIDLow), NDS.UserData);
WIFI_LOG("wifi: sent %d/40 bytes of MP default reply\n", txlen);
}
void Wifi::SendMPReply(u16 clienttime, u16 clientmask)
{
TXSlot* slot = &TXSlots[5];
// mark the last packet as success. dunno what the MSB is, it changes.
//if (slot->Valid)
if (IOPORT(W_TXSlotReply2) & 0x8000)
*(u16*)&RAM[slot->Addr] = 0x0001;
// CHECKME!!
// can the transfer rate for MP replies be set, or is it determined from the CMD transfer rate?
// how does it work for default empty replies?
slot->Rate = 2;
IOPORT(W_TXSlotReply2) = IOPORT(W_TXSlotReply1);
IOPORT(W_TXSlotReply1) = 0;
if (!(IOPORT(W_TXSlotReply2) & 0x8000))
{
slot->Valid = false;
}
else
{
slot->Valid = true;
slot->Addr = (IOPORT(W_TXSlotReply2) & 0x0FFF) << 1;
slot->Length = *(u16*)&RAM[slot->Addr + 0xA] & 0x3FFF;
// the packet is entirely ignored if it lasts longer than the maximum reply time
u32 duration = PreambleLen(slot->Rate) + (slot->Length * (slot->Rate==2 ? 4:8));
if (duration > clienttime)
slot->Valid = false;
}
// this seems to be set upon IRQ0
// TODO: how does it behave if the packet addr is changed before it gets sent? (maybe just not possible)
if (slot->Valid)
{
slot->CurPhase = 0;
TXSendFrame(slot, 5);
}
else
{
slot->CurPhase = 10;
SendMPDefaultReply();
}
u16 clientnum = 0;
for (int i = 1; i < IOPORT(W_AIDLow); i++)
{
if (clientmask & (1<<i))
clientnum++;
}
slot->CurPhaseTime = 16 + ((clienttime + 10) * clientnum) + PreambleLen(slot->Rate);
IOPORT(W_TXBusy) |= 0x0080;
}
void Wifi::SendMPAck(u16 cmdcount, u16 clientfail)
{
u8 ack[12 + 32];
*(u16*)&ack[0xA] = 32; // length
// rate
if (TXSlots[1].Rate == 2) ack[0x8] = 0x14;
else ack[0x8] = 0xA;
if (CurChannel == 0) return;
ack[0x9] = CurChannel;
*(u16*)&ack[0xC + 0x00] = 0x0218;
*(u16*)&ack[0xC + 0x02] = 0;
*(u16*)&ack[0xC + 0x04] = 0x0903;
*(u16*)&ack[0xC + 0x06] = 0x00BF;
*(u16*)&ack[0xC + 0x08] = 0x0300;
*(u16*)&ack[0xC + 0x0A] = IOPORT(W_BSSID0);
*(u16*)&ack[0xC + 0x0C] = IOPORT(W_BSSID1);
*(u16*)&ack[0xC + 0x0E] = IOPORT(W_BSSID2);
*(u16*)&ack[0xC + 0x10] = IOPORT(W_MACAddr0);
*(u16*)&ack[0xC + 0x12] = IOPORT(W_MACAddr1);
*(u16*)&ack[0xC + 0x14] = IOPORT(W_MACAddr2);
*(u16*)&ack[0xC + 0x16] = IOPORT(W_TXSeqNo) << 4;
*(u16*)&ack[0xC + 0x18] = cmdcount;
*(u16*)&ack[0xC + 0x1A] = clientfail;
*(u32*)&ack[0xC + 0x1C] = 0;
if (!clientfail)
{
u32 nextbeacon;
if (IOPORT(W_TXBusy) & 0x0010)
nextbeacon = 0;
else
nextbeacon = ((IOPORT(W_BeaconCount1) - 1) << 10) + (0x400 - (USCounter & 0x3FF));
int runahead = std::min(CmdCounter, nextbeacon);
if (CmdCounter < 1000) runahead -= 210;
*(u32*)&ack[0] = std::max(runahead - (32*(TXSlots[1].Rate==2?4:8)), 0);
}
else
{
*(u32*)&ack[0] = PreambleLen(TXSlots[1].Rate);
}
int txlen = Platform::MP_SendAck(ack, 12+32, USTimestamp, NDS.UserData);
WIFI_LOG("wifi: sent %d/44 bytes of MP ack, %d %d\n", txlen, ComStatus, RXTime);
}
bool Wifi::ProcessTX(TXSlot* slot, int num)
{
slot->CurPhaseTime -= kTimerInterval;
if (slot->CurPhaseTime > 0)
{
if (slot->CurPhase == 1)
{
if (!(slot->CurPhaseTime & slot->HalfwordTimeMask))
IOPORT(W_RXTXAddr)++;
}
else if (slot->CurPhase == 2)
{
MPReplyTimer -= kTimerInterval;
if (MPReplyTimer <= 0 && MPClientMask != 0)
{
int nclient = 1;
while (!(MPClientMask & (1 << nclient))) nclient++;
u32 curclient = 1 << nclient;
if (!(MPClientFail & curclient))
MPClientReplyRX(nclient);
MPReplyTimer += 10 + IOPORT(W_CmdReplyTime);
MPClientMask &= ~curclient;
}
}
return false;
}
switch (slot->CurPhase)
{
case 0: // preamble done
{
SetIRQ(7);
if (num == 5)
SetStatus(8);
else
SetStatus(3);
u32 len = slot->Length;
if (slot->Rate == 2)
{
len *= 4;
slot->HalfwordTimeMask = 0x7 & kTimeCheckMask;
}
else
{
len *= 8;
slot->HalfwordTimeMask = 0xF & kTimeCheckMask;
}
slot->CurPhase = 1;
slot->CurPhaseTime = len;
// set TX addr
IOPORT(W_RXTXAddr) = slot->Addr >> 1;
if (num != 5)
{
TXSendFrame(slot, num);
}
// if the packet is being sent via LOC1..3, send it to the AP
// any packet sent via CMD/REPLY/BEACON isn't going to have much use outside of local MP
if (num == 0 || num == 2 || num == 3)
{
u16 framectl = *(u16*)&RAM[slot->Addr + 0xC];
if ((framectl & 0x00FF) == 0x0010)
{
u16 aid = *(u16*)&RAM[slot->Addr + 0xC + 24 + 4];
if (aid) Log(LogLevel::Debug, "[HOST] syncing client %04X, sync=%016llX\n", aid, USTimestamp);
}
else if ((framectl & 0x00FF) == 0x00C0)
{
if (IsMPClient)
{
Log(LogLevel::Info, "[CLIENT] deauth\n");
IsMP = false;
IsMPClient = false;
}
}
}
}
break;
case 10: // preamble done (default empty MP reply)
{
SetIRQ(7);
SetStatus(8);
slot->CurPhase = 11;
slot->CurPhaseTime = 28*4;
slot->HalfwordTimeMask = 0xFFFFFFFF;
}
break;
case 1: // transmit done
{
// for the MP CMD and reply slots, this is set later
if (num != 1 && num != 5)
*(u16*)&RAM[slot->Addr] = 0x0001;
RAM[slot->Addr + 5] = 0;
if (num == 1)
{
if (IOPORT(W_TXStatCnt) & 0x4000)
{
IOPORT(W_TXStat) = 0x0800;
SetIRQ(1);
}
SetStatus(5);
MPReplyTimer = 16 + PreambleLen(slot->Rate);
u16 res = 0;
if (MPClientMask)
res = Platform::MP_RecvReplies(MPClientReplies, USTimestamp, MPClientMask, NDS.UserData);
MPClientFail &= ~res;
// TODO: 112 likely includes the ack preamble, which needs adjusted
// for long-preamble settings
slot->CurPhase = 2;
slot->CurPhaseTime = 112 + ((10 + IOPORT(W_CmdReplyTime)) * NumClients(MPClientMask));
break;
}
else if (num == 5)
{
if (IOPORT(W_TXStatCnt) & 0x1000)
{
IOPORT(W_TXStat) = 0x0401;
SetIRQ(1);
}
SetStatus(1);
IOPORT(W_TXBusy) &= ~0x80;
FireTX();
return true;
}
IOPORT(W_TXBusy) &= ~(1<<num);
switch (num)
{
case 0:
case 2:
case 3:
IOPORT(W_TXStat) = 0x0001 | ((num?(num-1):0)<<12);
SetIRQ(1);
IOPORT(W_TXSlotLoc1 + ((num?(num-1):0)*4)) &= 0x7FFF;
break;
case 4: // beacon
if (IOPORT(W_TXStatCnt) & 0x8000)
{
IOPORT(W_TXStat) = 0x0301;
SetIRQ(1);
}
break;
}
SetStatus(1);
FireTX();
}
return true;
case 11: // MP default reply transfer finished
{
IOPORT(W_TXSeqNo) = (IOPORT(W_TXSeqNo) + 1) & 0x0FFF;
IOPORT(W_TXBusy) &= ~0x80;
SetStatus(1);
FireTX();
}
return true;
case 2: // MP host transfer done
{
SetIRQ(7);
SetStatus(8);
IOPORT(W_RXTXAddr) = 0xFC0;
if (slot->Rate == 2) slot->CurPhaseTime = 32 * 4;
else slot->CurPhaseTime = 32 * 8;
ReportMPReplyErrors(MPClientFail);
// send
u16 cmdcount = (CmdCounter + 9) / 10;
SendMPAck(cmdcount, MPClientFail);
slot->CurPhase = 3;
}
break;
case 3: // MP host ack transfer (reply wait done)
{
if (!MPClientFail)
*(u16*)&RAM[slot->Addr] = 0x0001;
else
*(u16*)&RAM[slot->Addr] = 0x0005;
// this is set to indicate which clients failed to reply
*(u16*)&RAM[slot->Addr + 0x2] = MPClientFail;
if (!MPClientFail)
IncrementTXCount(slot);
IOPORT(W_TXSeqNo) = (IOPORT(W_TXSeqNo) + 1) & 0x0FFF;
if (IOPORT(W_TXStatCnt) & 0x2000)
{
IOPORT(W_TXStat) = 0x0B01;
SetIRQ(1);
}
if (MPClientFail && false)
{
// if some clients failed to respond: try again
// TODO: fix this (causes instability)
StartTX_Cmd();
break;
}
else
{
IOPORT(W_TXBusy) &= ~(1<<1);
IOPORT(W_TXSlotCmd) &= 0x7FFF;
SetStatus(1);
SetIRQ(12);
FireTX();
}
}
return true;
case 13: // MP transfer failed (timeout)
{
IOPORT(W_TXBusy) &= ~(1<<1);
IOPORT(W_TXSlotCmd) &= 0x7FFF;
*(u16*)&RAM[slot->Addr] = 0x0005;
IOPORT(W_TXSeqNo) = (IOPORT(W_TXSeqNo) + 1) & 0x0FFF;
SetStatus(1);
SetIRQ(12);
FireTX();
}
return true;
}
return false;
}
inline void Wifi::IncrementRXAddr(u16& addr, u16 inc)
{
for (u32 i = 0; i < inc; i += 2)
{
addr += 2;
addr &= 0x1FFE;
if (addr == (IOPORT(W_RXBufEnd) & 0x1FFE))
addr = (IOPORT(W_RXBufBegin) & 0x1FFE);
}
}
void Wifi::StartRX()
{
u16 framelen = *(u16*)&RXBuffer[8];
RXTime = framelen;
u16 txrate = *(u16*)&RXBuffer[6];
if (txrate == 0x14)
{
RXTime *= 4;
RXHalfwordTimeMask = 0x7 & kTimeCheckMask;
}
else
{
RXTime *= 8;
RXHalfwordTimeMask = 0xF & kTimeCheckMask;
}
u16 addr = IOPORT(W_RXBufWriteCursor) << 1;
IncrementRXAddr(addr, 12);
IOPORT(W_RXTXAddr) = addr >> 1;
RXBufferPtr = 12;
SetIRQ(6);
SetStatus(6);
ComStatus |= 1;
}
void Wifi::FinishRX()
{
ComStatus &= ~0x1;
RXCounter = 0;
if (!ComStatus)
{
if (IOPORT(W_PowerState) & (1<<9))
{
IOPORT(W_TRXPower) = 0;
SetStatus(9);
}
else
SetStatus(1);
}
// TODO: RX stats
u16 framectl = *(u16*)&RXBuffer[12];
u16 seqno = *(u16*)&RXBuffer[12 + 22];
// check the frame's destination address
// note: the hardware always checks the first address field, regardless of the frame type/etc
// similarly, the second address field is used to send acks to non-broadcast frames
u8* dstmac = &RXBuffer[12 + 4];
if (!(dstmac[0] & 0x01))
{
if (!MACEqual(dstmac, (u8*)&IOPORT(W_MACAddr0)))
return;
}
// reject the frame if it's a WEP frame and WEP is off
// TODO: check if sending WEP frames with WEP off works at all?
if (framectl & (1<<14))
{
if (!(IOPORT(W_WEPCnt) & (1<<15)))
return;
}
// apply RX filtering
// TODO:
// * RXFILTER bits 0, 9, 10, 12 not fully understood
// * port 0D8 also affects reception of frames
// * MP CMD frames with a duplicate sequence number are ignored
u16 rxflags = 0x0010;
bool cmd_dupe = false;
switch ((framectl >> 2) & 0x3)
{
case 0: // management
{
u8* bssid = &RXBuffer[12 + 16];
if (MACEqual(bssid, (u8*)&IOPORT(W_BSSID0)))
rxflags |= 0x8000;
u16 subtype = (framectl >> 4) & 0xF;
if (subtype == 0x8) // beacon
{
if (!(rxflags & 0x8000))
{
if (!(IOPORT(W_RXFilter) & (1<<0)))
return;
}
rxflags |= 0x0001;
}
else if ((subtype <= 0x5) ||
(subtype >= 0xA && subtype <= 0xC))
{
if (!(rxflags & 0x8000))
{
// CHECKME!
if (!(IOPORT(W_RXFilter) & (3<<9)))
return;
}
}
}
break;
case 1: // control
{
if ((framectl & 0xF0) == 0xA0) // PS-poll
{
u8* bssid = &RXBuffer[12 + 4];
if (MACEqual(bssid, (u8*)&IOPORT(W_BSSID0)))
rxflags |= 0x8000;
if (!(rxflags & 0x8000))
{
if (!(IOPORT(W_RXFilter) & (1<<11)))
return;
}
rxflags |= 0x0005;
}
else
return;
}
break;
case 2: // data
{
u16 fromto = (framectl >> 8) & 0x3;
if (IOPORT(W_RXFilter2) & (1<<fromto))
return;
int bssidoffset[4] = {16, 4, 10, 0};
if (bssidoffset[fromto])
{
u8* bssid = &RXBuffer[12 + bssidoffset[fromto]];
if (MACEqual(bssid, (u8*)&IOPORT(W_BSSID0)))
rxflags |= 0x8000;
}
u16 rxfilter = IOPORT(W_RXFilter);
if (!(rxflags & 0x8000))
{
if (!(rxfilter & (1<<11)))
return;
}
if (framectl & (1<<11)) // retransmit
{
if (!(rxfilter & (1<<0)))
return;
}
// check for MP frames
// the hardware simply checks for these specific MAC addresses
// the reply check has priority over the other checks
// TODO: it seems to be impossible to receive a MP reply outside of a CMD transfer's reply timeframe
// if the framectl subtype field is 1 or 5
// maybe one of the unknown registers controls that?
// maybe it is impossible to receive CF-Ack frames outside of a CF-Poll period?
// TODO: GBAtek says frame type F is for all empty packets?
// my hardware tests say otherwise
if (MACEqual(&RXBuffer[12 + 16], MPReplyMAC))
{
if ((framectl & 0xF0) == 0x50)
rxflags |= 0x000F;
else
rxflags |= 0x000E;
}
else if (MACEqual(&RXBuffer[12 + 4], MPCmdMAC))
{
if (seqno == MPLastSeqno) cmd_dupe = true;
MPLastSeqno = seqno;
rxflags |= 0x000C;
}
else if (MACEqual(&RXBuffer[12 + 4], MPAckMAC))
{
rxflags |= 0x000D;
}
else
{
rxflags |= 0x0008;
}
switch ((framectl >> 4) & 0xF)
{
case 0x0: break;
case 0x1:
if ((rxflags & 0xF) == 0xD)
{
if (!(rxfilter & (1<<7))) return;
}
else if ((rxflags & 0xF) != 0xE)
{
if (!(rxfilter & (1<<1))) return;
}
break;
case 0x2:
if ((rxflags & 0xF) != 0xC)
{
if (!(rxfilter & (1<<2))) return;
}
break;
case 0x3:
if (!(rxfilter & (1<<3))) return;
break;
case 0x4: break;
case 0x5:
if ((rxflags & 0xF) == 0xF)
{
if (!(rxfilter & (1<<8))) return;
}
else
{
if (!(rxfilter & (1<<4))) return;
}
break;
case 0x6:
if (!(rxfilter & (1<<5))) return;
break;
case 0x7:
if (!(rxfilter & (1<<6))) return;
break;
default:
return;
}
}
break;
}
if (!cmd_dupe)
{
// build the RX header
u16 headeraddr = IOPORT(W_RXBufWriteCursor) << 1;
*(u16*)&RAM[headeraddr] = rxflags;
IncrementRXAddr(headeraddr);
*(u16*)&RAM[headeraddr] = 0x0040; // ???
IncrementRXAddr(headeraddr, 4);
*(u16*)&RAM[headeraddr] = *(u16*)&RXBuffer[6]; // TX rate
IncrementRXAddr(headeraddr);
*(u16*)&RAM[headeraddr] = *(u16*)&RXBuffer[8]; // frame length
IncrementRXAddr(headeraddr);
*(u16*)&RAM[headeraddr] = 0x4080; // RSSI
// signal successful reception
u16 addr = IOPORT(W_RXTXAddr) << 1;
if (addr & 0x2) IncrementRXAddr(addr);
IOPORT(W_RXBufWriteCursor) = (addr & ~0x3) >> 1;
SetIRQ(0);
}
if ((rxflags & 0x800F) == 0x800C)
{
// reply to CMD frames
u16 clientmask = *(u16*)&RXBuffer[0xC + 26];
if (IOPORT(W_AIDLow) && (clientmask & (1 << IOPORT(W_AIDLow))))
{
SendMPReply(*(u16*)&RXBuffer[0xC + 24], clientmask);
}
else
{
// send a blank
// this is just so the host can have something to receive, instead of hitting a timeout
// in the case this client wasn't ready to send a reply
// TODO: also send this if we have RX disabled
Platform::MP_SendReply(nullptr, 0, USTimestamp, 0, NDS.UserData);
}
}
else if ((rxflags & 0x800F) == 0x8001)
{
// when receiving a beacon with the right BSSID, the beacon's timestamp
// is copied to USCOUNTER
u32 len = *(u16*)&RXBuffer[8];
u16 txrate = *(u16*)&RXBuffer[6];
len *= ((txrate==0x14) ? 4 : 8);
len -= 76; // CHECKME: is this offset fixed?
u64 timestamp = *(u64*)&RXBuffer[12 + 24];
timestamp += (u64)len;
USCounter = timestamp;
}
}
void Wifi::MPClientReplyRX(int client)
{
if (IOPORT(W_PowerState) & (1<<9))
return;
if (!(IOPORT(W_RXCnt) & 0x8000))
return;
if (IOPORT(W_RXBufBegin) == IOPORT(W_RXBufEnd))
return;
int framelen;
u8 txrate;
u8* reply = &MPClientReplies[(client-1)*1024];
framelen = *(u16*)&reply[10];
txrate = reply[8];
// TODO: what are the maximum crop values?
u16 framectl = *(u16*)&reply[12];
if (framectl & (1<<14))
{
framelen -= (IOPORT(W_RXLenCrop) >> 7) & 0x1FE;
if (framelen > 24) memmove(&RXBuffer[12+24], &RXBuffer[12+28], framelen);
}
else
framelen -= (IOPORT(W_RXLenCrop) << 1) & 0x1FE;
if (framelen < 0) framelen = 0;
// TODO rework RX system so we don't need this (by reading directly into MPClientReplies)
memcpy(RXBuffer, reply, 12+framelen);
*(u16*)&RXBuffer[6] = txrate;
*(u16*)&RXBuffer[8] = framelen;
RXTimestamp = 0;
StartRX();
}
bool Wifi::CheckRX(int type) // 0=regular 1=MP replies 2=MP host frames
{
if (IOPORT(W_PowerState) & (1<<9))
return false;
if (!(IOPORT(W_RXCnt) & 0x8000))
return false;
if (IOPORT(W_RXBufBegin) == IOPORT(W_RXBufEnd))
return false;
int rxlen;
int framelen;
u16 framectl;
u8 txrate, chan;
u64 timestamp;
for (;;)
{
timestamp = 0;
if (type == 0)
{
rxlen = Platform::MP_RecvPacket(RXBuffer, &timestamp, NDS.UserData);
if ((rxlen <= 0) && (!IsMP))
rxlen = WifiAP->RecvPacket(RXBuffer);
}
else
{
rxlen = Platform::MP_RecvHostPacket(RXBuffer, &timestamp, NDS.UserData);
if (rxlen < 0)
{
// host is gone
// TODO: make this more resilient
IsMP = false;
IsMPClient = false;
}
}
if (rxlen <= 0) return false;
if (rxlen < 12+24) continue;
framelen = *(u16*)&RXBuffer[10];
if (framelen != rxlen-12)
{
Log(LogLevel::Error, "bad frame length %d/%d\n", framelen, rxlen-12);
continue;
}
chan = RXBuffer[9];
if (chan != CurChannel || CurChannel == 0)
{
Log(LogLevel::Debug, "received frame but bad channel %d (expected %d)\n", chan, CurChannel);
continue;
}
// hack: ignore MP frames if not engaged in a MP comm
if (type == 0 && (!IsMP))
{
if (MACEqual(&RXBuffer[12 + 16], MPReplyMAC) ||
MACEqual(&RXBuffer[12 + 4], MPCmdMAC) ||
MACEqual(&RXBuffer[12 + 4], MPReplyMAC))
{
continue;
}
}
framectl = *(u16*)&RXBuffer[12+0];
txrate = RXBuffer[8];
// TODO: what are the maximum crop values?
if (framectl & (1<<14))
{
framelen -= (IOPORT(W_RXLenCrop) >> 7) & 0x1FE;
if (framelen > 24) memmove(&RXBuffer[12+24], &RXBuffer[12+28], framelen);
}
else
framelen -= (IOPORT(W_RXLenCrop) << 1) & 0x1FE;
if (framelen < 0) framelen = 0;
break;
}
WIFI_LOG("wifi: received packet FC:%04X SN:%04X CL:%04X RXT:%d CMT:%d\n",
framectl, *(u16*)&RXBuffer[12+4+6+6+6], *(u16*)&RXBuffer[12+4+6+6+6+2+2], framelen*4, IOPORT(W_CmdReplyTime));
*(u16*)&RXBuffer[6] = txrate;
*(u16*)&RXBuffer[8] = framelen;
bool macgood = (RXBuffer[12 + 4] & 0x01) || MACEqual(&RXBuffer[12 + 4], (u8*)&IOPORT(W_MACAddr0));
if (((framectl & 0x00FF) == 0x0010) && timestamp && macgood)
{
// if receiving an association response: get the sync value from the host
u16 aid = *(u16*)&RXBuffer[12+24+4];
if (aid)
{
Log(LogLevel::Debug, "[CLIENT %01X] host sync=%016llX\n", aid&0xF, timestamp);
IsMP = true;
IsMPClient = true;
USTimestamp = timestamp;
NextSync = RXTimestamp + (framelen * (txrate==0x14 ? 4:8));
}
RXTimestamp = 0;
StartRX();
}
else if (((framectl & 0x00FF) == 0x00C0) && timestamp && macgood && IsMPClient)
{
IsMP = false;
IsMPClient = false;
NextSync = 0;
RXTimestamp = 0;
StartRX();
}
else if (macgood && IsMPClient)
{
// if we are being a MP client, we need to delay this frame until we reach the
// timestamp it came with
// we also need to determine how far we can run after having received this frame
RXTimestamp = timestamp;
if (RXTimestamp < USTimestamp) RXTimestamp = USTimestamp;
NextSync = RXTimestamp + (framelen * (txrate==0x14 ? 4:8));
if (MACEqual(&RXBuffer[12 + 4], MPCmdMAC))
{
u16 clienttime = *(u16*)&RXBuffer[12+24];
u16 clientmask = *(u16*)&RXBuffer[12+26];
// include the MP reply time window
NextSync += 112 + ((clienttime + 10) * NumClients(clientmask));
}
else if (MACEqual(&RXBuffer[12 + 4], MPAckMAC))
{
u32 runahead = *(u32*)&RXBuffer[0];
NextSync += runahead;
}
}
else
{
// otherwise, just start receiving this frame now
RXTimestamp = 0;
StartRX();
}
return true;
}
void Wifi::MSTimer()
{
if (IOPORT(W_USCompareCnt))
{
if ((USCounter & ~0x3FF) == USCompare)
{
BlockBeaconIRQ14 = false;
SetIRQ14(0);
}
}
if (IOPORT(W_BeaconCount1) != 0)
{
IOPORT(W_BeaconCount1)--;
if (IOPORT(W_BeaconCount1) == 0) SetIRQ14(1);
}
if (IOPORT(W_BeaconCount1) == 0)
IOPORT(W_BeaconCount1) = IOPORT(W_BeaconInterval);
if (IOPORT(W_BeaconCount2) != 0)
{
IOPORT(W_BeaconCount2)--;
if (IOPORT(W_BeaconCount2) == 0) SetIRQ13();
}
}
void Wifi::USTimer(u32 param)
{
USTimestamp += kTimerInterval;
if (IsMPClient && (!ComStatus))
{
if (RXTimestamp && (USTimestamp >= RXTimestamp))
{
RXTimestamp = 0;
StartRX();
}
if (USTimestamp >= NextSync)
{
// TODO: not do this every tick if it fails to receive a frame!
CheckRX(2);
}
}
if (!(USTimestamp & 0x3FF & kTimeCheckMask))
WifiAP->MSTimer();
if (USUntilPowerOn < 0)
{
USUntilPowerOn += kTimerInterval;
if (USUntilPowerOn >= 0)
{
USUntilPowerOn = 0;
IOPORT(W_PowerState) = 0;
SetStatus(1);
UpdatePowerStatus(0);
}
}
if (IOPORT(W_USCountCnt))
{
USCounter += kTimerInterval;
u32 uspart = (USCounter & 0x3FF);
if (IOPORT(W_USCompareCnt))
{
u32 beaconus = (IOPORT(W_BeaconCount1) << 10) | (0x3FF - uspart);
if ((beaconus & kTimeCheckMask) == (IOPORT(W_PreBeacon) & kTimeCheckMask))
SetIRQ15();
}
if (!(uspart & kTimeCheckMask))
MSTimer();
}
if (IOPORT(W_CmdCountCnt) & 0x0001)
{
if (CmdCounter > 0)
{
if (CmdCounter < kTimerInterval)
CmdCounter = 0;
else
CmdCounter -= kTimerInterval;
}
}
if (IOPORT(W_ContentFree) != 0)
{
if (IOPORT(W_ContentFree) < kTimerInterval)
IOPORT(W_ContentFree) = 0;
else
IOPORT(W_ContentFree) -= kTimerInterval;
}
if (ComStatus == 0)
{
u16 txbusy = IOPORT(W_TXBusy);
if (txbusy)
{
if (IOPORT(W_PowerState) & (1<<9))
{
ComStatus = 0;
TXCurSlot = -1;
}
else
{
ComStatus = 0x2;
if (txbusy & 0x0080) TXCurSlot = 5;
else if (txbusy & 0x0010) TXCurSlot = 4;
else if (txbusy & 0x0008) TXCurSlot = 3;
else if (txbusy & 0x0004) TXCurSlot = 2;
else if (txbusy & 0x0002) TXCurSlot = 1;
else if (txbusy & 0x0001) TXCurSlot = 0;
}
}
else
{
if ((!IsMPClient) || (USTimestamp > NextSync))
{
if ((!(RXCounter & 0x1FF & kTimeCheckMask)) && (!ComStatus))
{
CheckRX(0);
}
}
RXCounter += kTimerInterval;
}
}
if (ComStatus & 0x2)
{
bool finished = ProcessTX(&TXSlots[TXCurSlot], TXCurSlot);
if (finished)
{
if (IOPORT(W_PowerState) & (1<<9))
{
IOPORT(W_TXBusy) = 0;
IOPORT(W_TRXPower) = 0;
SetStatus(9);
}
// transfer finished, see if there's another slot to do
// checkme: priority order of beacon/reply
// TODO: for CMD, check CMDCOUNT
u16 txbusy = IOPORT(W_TXBusy);
if (txbusy & 0x0080) TXCurSlot = 5;
else if (txbusy & 0x0010) TXCurSlot = 4;
else if (txbusy & 0x0008) TXCurSlot = 3;
else if (txbusy & 0x0004) TXCurSlot = 2;
else if (txbusy & 0x0002) TXCurSlot = 1;
else if (txbusy & 0x0001) TXCurSlot = 0;
else
{
TXCurSlot = -1;
ComStatus = 0;
RXCounter = 0;
}
}
}
if (ComStatus & 0x1)
{
RXTime -= kTimerInterval;
if (!(RXTime & RXHalfwordTimeMask))
{
u16 addr = IOPORT(W_RXTXAddr) << 1;
if (addr < 0x1FFF) *(u16*)&RAM[addr] = *(u16*)&RXBuffer[RXBufferPtr];
IncrementRXAddr(addr);
IOPORT(W_RXTXAddr) = addr >> 1;
RXBufferPtr += 2;
if (RXTime <= 0) // finished receiving
{
FinishRX();
}
else if (addr == (IOPORT(W_RXBufReadCursor) << 1))
{
// TODO: properly check the crossing of the read cursor
// (for example, if it is outside of the RX buffer)
Log(LogLevel::Debug, "wifi: RX buffer full (buf=%04X/%04X rd=%04X wr=%04X rxtx=%04X power=%04X com=%d rxcnt=%04X filter=%04X/%04X frame=%04X/%04X len=%d)\n",
(IOPORT(W_RXBufBegin)>>1)&0xFFF, (IOPORT(W_RXBufEnd)>>1)&0xFFF,
IOPORT(W_RXBufReadCursor), IOPORT(W_RXBufWriteCursor),
IOPORT(W_RXTXAddr), IOPORT(W_PowerState), ComStatus,
IOPORT(W_RXCnt), IOPORT(W_RXFilter), IOPORT(W_RXFilter2),
*(u16*)&RXBuffer[0], *(u16*)&RXBuffer[12], *(u16*)&RXBuffer[8]);
RXTime = 0;
SetStatus(1);
if (TXCurSlot == 0xFFFFFFFF)
{
ComStatus &= ~0x1;
RXCounter = 0;
}
// TODO: proper error management
if ((!ComStatus) && (IOPORT(W_PowerState) & (1<<9)))
{
IOPORT(W_TRXPower) = 0;
SetStatus(9);
}
}
}
}
ScheduleTimer(false);
}
void Wifi::ChangeChannel()
{
u32 val1 = RFRegs[RFChannelIndex[0]];
u32 val2 = RFRegs[RFChannelIndex[1]];
CurChannel = 0;
for (int i = 0; i < 14; i++)
{
if (val1 == RFChannelData[i][0] && val2 == RFChannelData[i][1])
{
CurChannel = i+1;
break;
}
}
if (CurChannel > 0)
Log(LogLevel::Debug, "wifi: switching to channel %d\n", CurChannel);
else
Log(LogLevel::Debug, "wifi: invalid channel values %05X:%05X\n", val1, val2);
}
void Wifi::RFTransfer_Type2()
{
u32 id = (IOPORT(W_RFData2) >> 2) & 0x1F;
if (IOPORT(W_RFData2) & 0x0080)
{
u32 data = RFRegs[id];
IOPORT(W_RFData1) = data & 0xFFFF;
IOPORT(W_RFData2) = (IOPORT(W_RFData2) & 0xFFFC) | ((data >> 16) & 0x3);
}
else
{
u32 data = IOPORT(W_RFData1) | ((IOPORT(W_RFData2) & 0x0003) << 16);
RFRegs[id] = data;
if (id == RFChannelIndex[0] || id == RFChannelIndex[1])
ChangeChannel();
}
}
void Wifi::RFTransfer_Type3()
{
u32 id = (IOPORT(W_RFData1) >> 8) & 0x3F;
u32 cmd = IOPORT(W_RFData2) & 0xF;
if (cmd == 6)
{
IOPORT(W_RFData1) = (IOPORT(W_RFData1) & 0xFF00) | (RFRegs[id] & 0xFF);
}
else if (cmd == 5)
{
u32 data = IOPORT(W_RFData1) & 0xFF;
RFRegs[id] = data;
if (id == RFChannelIndex[0] || id == RFChannelIndex[1])
ChangeChannel();
}
}
u16 Wifi::Read(u32 addr)
{
if (addr >= 0x04810000)
return 0;
addr &= 0x7FFE;
if (addr >= 0x4000 && addr < 0x6000)
{
return *(u16*)&RAM[addr & 0x1FFE];
}
if (addr >= 0x2000 && addr < 0x4000)
return 0xFFFF;
bool activeread = (addr < 0x1000);
switch (addr)
{
case W_Random: // random generator. not accurate
// TODO: rotate the sequence based on the ARM7 cycle counter (if this is important)
Random = (Random & 0x1) ^ (((Random & 0x3FF) << 1) | (Random >> 10));
return Random;
case W_Preamble:
return IOPORT(W_Preamble) & 0x0003;
case W_USCount0: return (u16)(USCounter & 0xFFFF);
case W_USCount1: return (u16)((USCounter >> 16) & 0xFFFF);
case W_USCount2: return (u16)((USCounter >> 32) & 0xFFFF);
case W_USCount3: return (u16)(USCounter >> 48);
case W_USCompare0: return (u16)(USCompare & 0xFFFF);
case W_USCompare1: return (u16)((USCompare >> 16) & 0xFFFF);
case W_USCompare2: return (u16)((USCompare >> 32) & 0xFFFF);
case W_USCompare3: return (u16)(USCompare >> 48);
case W_CmdCount: return (CmdCounter + 9) / 10;
case W_BBRead:
if ((IOPORT(W_BBCnt) & 0xF000) != 0x6000)
{
Log(LogLevel::Error, "WIFI: bad BB read, CNT=%04X\n", IOPORT(W_BBCnt));
return 0;
}
return BBRegs[IOPORT(W_BBCnt) & 0xFF];
case W_BBBusy:
return 0; // TODO eventually (BB busy flag)
case W_RFBusy:
return 0; // TODO eventually (RF busy flag)
case W_RXBufDataRead:
if (activeread)
{
u32 rdaddr = IOPORT(W_RXBufReadAddr);
u16 ret = *(u16*)&RAM[rdaddr];
rdaddr += 2;
if (rdaddr == (IOPORT(W_RXBufEnd) & 0x1FFE))
rdaddr = (IOPORT(W_RXBufBegin) & 0x1FFE);
if (rdaddr == IOPORT(W_RXBufGapAddr))
{
rdaddr += (IOPORT(W_RXBufGapSize) << 1);
if (rdaddr >= (IOPORT(W_RXBufEnd) & 0x1FFE))
rdaddr = rdaddr + (IOPORT(W_RXBufBegin) & 0x1FFE) - (IOPORT(W_RXBufEnd) & 0x1FFE);
if (IOPORT(0x000) == 0xC340)
IOPORT(W_RXBufGapSize) = 0;
}
IOPORT(W_RXBufReadAddr) = rdaddr & 0x1FFE;
IOPORT(W_RXBufDataRead) = ret;
if (IOPORT(W_RXBufCount) > 0)
{
IOPORT(W_RXBufCount)--;
if (IOPORT(W_RXBufCount) == 0)
SetIRQ(9);
}
}
break;
case W_TXBusy:
return IOPORT(W_TXBusy) & 0x001F; // no bit for MP replies. odd
case W_CMDStat0:
case W_CMDStat1:
case W_CMDStat2:
case W_CMDStat3:
case W_CMDStat4:
case W_CMDStat5:
case W_CMDStat6:
case W_CMDStat7:
{
u16 ret = IOPORT(addr&0xFFF);
IOPORT(addr&0xFFF) = 0;
return ret;
}
}
return IOPORT(addr&0xFFF);
}
void Wifi::Write(u32 addr, u16 val)
{
if (addr >= 0x04810000)
return;
addr &= 0x7FFE;
if (addr >= 0x4000 && addr < 0x6000)
{
*(u16*)&RAM[addr & 0x1FFE] = val;
return;
}
if (addr >= 0x2000 && addr < 0x4000)
return;
switch (addr)
{
case W_ModeReset:
{
u16 oldval = IOPORT(W_ModeReset);
IOPORT(W_ModeReset) = val & 0x0001;
if (!(oldval & 0x0001) && (val & 0x0001))
{
IOPORT(0x27C) = 0x0005;
// TODO: 02A2??
UpdatePowerStatus(0);
}
else if ((oldval & 0x0001) && !(val & 0x0001))
{
IOPORT(0x27C) = 0x000A;
UpdatePowerStatus(0);
}
if (val & 0x2000)
{
IOPORT(W_RXBufWriteAddr) = 0;
IOPORT(W_CmdTotalTime) = 0;
IOPORT(W_CmdReplyTime) = 0;
IOPORT(0x1A4) = 0;
IOPORT(0x278) = 0x000F;
// TODO: other ports??
}
if (val & 0x4000)
{
IOPORT(W_ModeWEP) = 0;
IOPORT(W_TXStatCnt) = 0;
IOPORT(0x00A) = 0;
IOPORT(W_MACAddr0) = 0;
IOPORT(W_MACAddr1) = 0;
IOPORT(W_MACAddr2) = 0;
IOPORT(W_BSSID0) = 0;
IOPORT(W_BSSID1) = 0;
IOPORT(W_BSSID2) = 0;
IOPORT(W_AIDLow) = 0;
IOPORT(W_AIDFull) = 0;
IOPORT(W_TXRetryLimit) = 0x0707;
IOPORT(0x02E) = 0;
IOPORT(W_RXBufBegin) = 0x4000;
IOPORT(W_RXBufEnd) = 0x4800;
IOPORT(W_TXBeaconTIM) = 0;
IOPORT(W_Preamble) = 0x0001;
IOPORT(W_RXFilter) = 0x0401;
IOPORT(0x0D4) = 0x0001;
IOPORT(W_RXFilter2) = 0x0008;
IOPORT(0x0EC) = 0x3F03;
IOPORT(W_TXHeaderCnt) = 0;
IOPORT(0x198) = 0;
IOPORT(0x1A2) = 0x0001;
IOPORT(0x224) = 0x0003;
IOPORT(0x230) = 0x0047;
}
}
return;
case W_ModeWEP:
val &= 0x007F;
IOPORT(W_ModeWEP) = val;
if (IOPORT(W_PowerTX) & (1<<1))
{
if ((val & 0x7) == 1)
IOPORT(W_PowerDownCtrl) |= (1<<1);
else if ((val & 0x7) == 2)
IOPORT(W_PowerDownCtrl) = 3;
if ((val & 0x7) != 3)
IOPORT(W_PowerState) &= 0x0300;
UpdatePowerStatus(0);
}
return;
case W_IE:
{
u16 oldflags = IOPORT(W_IF) & IOPORT(W_IE);
IOPORT(W_IE) = val;
CheckIRQ(oldflags);
}
return;
case W_IF:
IOPORT(W_IF) &= ~val;
return;
case W_IFSet:
{
u16 oldflags = IOPORT(W_IF) & IOPORT(W_IE);
IOPORT(W_IF) |= (val & 0xFBFF);
CheckIRQ(oldflags);
Log(LogLevel::Debug, "wifi: force-setting IF %04X\n", val);
}
return;
case W_AIDLow:
IOPORT(W_AIDLow) = val & 0x000F;
return;
case W_AIDFull:
IOPORT(W_AIDFull) = val & 0x07FF;
return;
case W_PowerUS:
IOPORT(W_PowerUS) = val & 0x0003;
UpdatePowerOn();
return;
case W_PowerTX:
IOPORT(W_PowerTX) = val & 0x0003;
if (val & (1<<1))
{
if ((IOPORT(W_ModeWEP) & 0x7) == 1)
IOPORT(W_PowerDownCtrl) |= (1<<1);
else if ((IOPORT(W_ModeWEP) & 0x7) == 2)
IOPORT(W_PowerDownCtrl) = 3;
UpdatePowerStatus(0);
}
return;
case W_PowerState:
if ((IOPORT(W_ModeWEP) & 0x7) != 3)
return;
val = (IOPORT(W_PowerState) & 0x0300) | (val & 0x0003);
if ((val & 0x0300) == 0x0200)
val &= ~(1<<0);
else
val &= ~(1<<1);
if (!(val & (1<<9)))
val &= ~(1<<8);
IOPORT(W_PowerState) = val;
UpdatePowerStatus(0);
return;
case W_PowerForce:
val &= 0x8001;
IOPORT(W_PowerForce) = val;
UpdatePowerStatus(0);
return;
case W_PowerDownCtrl:
IOPORT(W_PowerDownCtrl) = val & 0x0003;
if (IOPORT(W_PowerTX) & (1<<1))
{
if ((IOPORT(W_ModeWEP) & 0x7) == 1)
IOPORT(W_PowerDownCtrl) |= (1<<1);
else if ((IOPORT(W_ModeWEP) & 0x7) == 2)
IOPORT(W_PowerDownCtrl) = 3;
}
if (val != 0 && val != 3)
Log(LogLevel::Warn, "wifi: unusual W_PowerDownCtrl value %04X\n", val);
UpdatePowerStatus(0);
return;
case W_USCountCnt: val &= 0x0001; break;
case W_USCompareCnt:
if (val & 0x0002) SetIRQ14(2);
val &= 0x0001;
break;
case W_USCount0: USCounter = (USCounter & 0xFFFFFFFFFFFF0000) | (u64)val; return;
case W_USCount1: USCounter = (USCounter & 0xFFFFFFFF0000FFFF) | ((u64)val << 16); return;
case W_USCount2: USCounter = (USCounter & 0xFFFF0000FFFFFFFF) | ((u64)val << 32); return;
case W_USCount3: USCounter = (USCounter & 0x0000FFFFFFFFFFFF) | ((u64)val << 48); return;
case W_USCompare0:
USCompare = (USCompare & 0xFFFFFFFFFFFF0000) | (u64)(val & 0xFC00);
if (val & 0x0001) BlockBeaconIRQ14 = true;
return;
case W_USCompare1: USCompare = (USCompare & 0xFFFFFFFF0000FFFF) | ((u64)val << 16); return;
case W_USCompare2: USCompare = (USCompare & 0xFFFF0000FFFFFFFF) | ((u64)val << 32); return;
case W_USCompare3: USCompare = (USCompare & 0x0000FFFFFFFFFFFF) | ((u64)val << 48); return;
case W_CmdCount: CmdCounter = val * 10; return;
case W_BBCnt:
IOPORT(W_BBCnt) = val;
if ((IOPORT(W_BBCnt) & 0xF000) == 0x5000)
{
u32 regid = IOPORT(W_BBCnt) & 0xFF;
if (!BBRegsRO[regid])
BBRegs[regid] = IOPORT(W_BBWrite) & 0xFF;
}
return;
case W_RFData2:
IOPORT(W_RFData2) = val;
if (RFVersion == 3) RFTransfer_Type3();
else RFTransfer_Type2();
return;
case W_RFCnt:
val &= 0x413F;
break;
case W_RXCnt:
if (val & 0x0001)
{
IOPORT(W_RXBufWriteCursor) = IOPORT(W_RXBufWriteAddr);
}
if (val & 0x0080)
{
IOPORT(W_TXSlotReply2) = IOPORT(W_TXSlotReply1);
IOPORT(W_TXSlotReply1) = 0;
}
if (val & 0x8000)
{
FireTX();
}
val &= 0xFF0E;
if (val & 0x7FFF) Log(LogLevel::Warn, "wifi: unknown RXCNT bits set %04X\n", val);
break;
case W_RXBufDataRead:
Log(LogLevel::Warn, "wifi: writing to RXBUF_DATA_READ. wat\n");
if (IOPORT(W_RXBufCount) > 0)
{
IOPORT(W_RXBufCount)--;
if (IOPORT(W_RXBufCount) == 0)
SetIRQ(9);
}
return;
case W_RXBufReadAddr:
case W_RXBufGapAddr:
val &= 0x1FFE;
break;
case W_RXBufGapSize:
case W_RXBufCount:
case W_RXBufWriteAddr:
case W_RXBufReadCursor:
val &= 0x0FFF;
break;
case W_TXReqReset:
IOPORT(W_TXReqRead) &= ~val;
return;
case W_TXReqSet:
IOPORT(W_TXReqRead) |= val;
FireTX();
return;
case W_TXSlotReset:
if (val & 0x0001) IOPORT(W_TXSlotLoc1) &= 0x7FFF;
if (val & 0x0002) IOPORT(W_TXSlotCmd) &= 0x7FFF;
if (val & 0x0004) IOPORT(W_TXSlotLoc2) &= 0x7FFF;
if (val & 0x0008) IOPORT(W_TXSlotLoc3) &= 0x7FFF;
// checkme: any bits affecting the beacon slot?
if (val & 0x0040) IOPORT(W_TXSlotReply2) &= 0x7FFF;
if (val & 0x0080) IOPORT(W_TXSlotReply1) &= 0x7FFF;
if ((val & 0xFF30) && (val != 0xFFFF)) Log(LogLevel::Warn, "unusual TXSLOTRESET %04X\n", val);
val = 0; // checkme (write-only port)
break;
case W_TXBufDataWrite:
{
u32 wraddr = IOPORT(W_TXBufWriteAddr);
*(u16*)&RAM[wraddr] = val;
wraddr += 2;
if (wraddr == IOPORT(W_TXBufGapAddr))
wraddr += (IOPORT(W_TXBufGapSize) << 1);
//if (IOPORT(0x000) == 0xC340)
// IOPORT(W_TXBufGapSize) = 0;
IOPORT(W_TXBufWriteAddr) = wraddr & 0x1FFE;
if (IOPORT(W_TXBufCount) > 0)
{
IOPORT(W_TXBufCount)--;
if (IOPORT(W_TXBufCount) == 0)
SetIRQ(8);
}
}
return;
case W_TXBufWriteAddr:
case W_TXBufGapAddr:
val &= 0x1FFE;
break;
case W_TXBufGapSize:
case W_TXBufCount:
val &= 0x0FFF;
break;
case W_TXSlotBeacon:
IsMP = (val & 0x8000) != 0;
break;
case W_TXSlotCmd:
if (CmdCounter == 0)
val = (val & 0x7FFF) | (IOPORT(W_TXSlotCmd) & 0x8000);
// fall-through
case W_TXSlotLoc1:
case W_TXSlotLoc2:
case W_TXSlotLoc3:
// checkme: is it possible to cancel a queued transfer that hasn't started yet
// by clearing bit15 here?
IOPORT(addr&0xFFF) = val;
FireTX();
return;
case 0x228:
case 0x244:
//printf("wifi: write port%03X %04X\n", addr, val);
break;
// read-only ports
case 0x000:
case 0x034:
case 0x044:
case 0x054:
case 0x098:
case 0x0B0:
case 0x0B6:
case 0x0B8:
case 0x15C:
case 0x15E:
case 0x180:
case 0x19C:
case 0x1A8:
case 0x1AC:
case 0x1C4:
case 0x210:
case 0x214:
case 0x268:
return;
default:
//printf("WIFI unk: write %08X %04X\n", addr, val);
break;
}
IOPORT(addr&0xFFF) = val;
}
const u8* Wifi::GetMAC() const
{
return (u8*)&IOPORT(W_MACAddr0);
}
const u8* Wifi::GetBSSID() const
{
return (u8*)&IOPORT(W_BSSID0);
}
}
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