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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.RegisterEventFuncs(Event_Wifi, this, {MakeEventThunk(Wifi, USTimer)});
WifiAP = new class WifiAP(this, NDS.UserData);
}
Wifi::~Wifi()
{
delete WifiAP; WifiAP = nullptr;
NDS.UnregisterEventFuncs(Event_Wifi);
}
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)
{