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https://github.com/melonDS-emu/melonDS.git
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wifi improvements
This commit is contained in:
StapleButter
parent
dba6776817
commit
d29dc7a2f0
184
src/Wifi.cpp
184
src/Wifi.cpp
@ -61,6 +61,8 @@ typedef struct
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TXSlot TXSlots[6];
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u8 RXBuffer[2048];
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u32 RXTime;
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u16 RXEndAddr;
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bool MPInited;
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@ -236,6 +238,29 @@ int PreambleLen(int rate)
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return 192;
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}
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void StartTX_LocN(int nslot, int loc)
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{
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TXSlot* slot = &TXSlots[nslot];
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if (IOPORT(W_TXSlotLoc1 + (loc*4)) & 0x7000)
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printf("wifi: unusual loc%d bits set %04X\n", loc, IOPORT(W_TXSlotLoc1 + (loc*4)));
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slot->Addr = (IOPORT(W_TXSlotLoc1 + (loc*4)) & 0x0FFF) << 1;
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slot->Length = *(u16*)&RAM[slot->Addr + 0xA] & 0x3FFF;
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u16 rate = *(u16*)&RAM[slot->Addr];
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if (rate == 0x14) slot->Rate = 2;
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else slot->Rate = 1;
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slot->CurPhase = 0;
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slot->CurPhaseTime = PreambleLen(slot->Rate);
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*(u16*)&RAM[slot->Addr + 0xC + 22] = IOPORT(W_TXSeqNo) << 4;
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int txlen = Platform::MP_SendPacket(&RAM[slot->Addr], 12 + slot->Length);
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printf("wifi: sent %d/%d bytes of loc%d packet\n", txlen, 12+slot->Length, loc);
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}
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void StartTX_Beacon()
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{
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TXSlot* slot = &TXSlots[4];
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@ -256,12 +281,47 @@ void StartTX_Beacon()
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*(u64*)&RAM[slot->Addr + 0xC + 24] = USCounter;
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int txlen = Platform::MP_SendPacket(&RAM[slot->Addr], 12 + slot->Length);
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printf("wifi: sent %d/%d bytes of packet\n", txlen, 12+slot->Length);
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//printf("wifi: sent %d/%d bytes of beacon packet\n", txlen, 12+slot->Length);
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*(u64*)&RAM[slot->Addr + 0xC + 24] = oldval;
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IOPORT(W_TXBusy) |= 0x0010;
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}
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void ProcessTX(TXSlot* slot, int busybit)
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void FireTX()
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{
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u16 txbusy = IOPORT(W_TXBusy);
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if (txbusy & 0x0008)
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{
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if (IOPORT(W_TXSlotLoc3) & 0x8000)
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{
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StartTX_LocN(3, 2);
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return;
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}
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}
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if (txbusy & 0x0004)
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{
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if (IOPORT(W_TXSlotLoc2) & 0x8000)
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{
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StartTX_LocN(2, 1);
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return;
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}
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}
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if (txbusy & 0x0001)
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{
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if (IOPORT(W_TXSlotLoc1) & 0x8000)
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{
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StartTX_LocN(0, 0);
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return;
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}
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}
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IOPORT(W_TXBusy) = 0;
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}
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void ProcessTX(TXSlot* slot, int num)
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{
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slot->CurPhaseTime--;
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if (slot->CurPhaseTime > 0) return;
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@ -288,9 +348,28 @@ void ProcessTX(TXSlot* slot, int busybit)
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*(u16*)&RAM[slot->Addr] = 0x0001;
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RAM[slot->Addr + 5] = 0;
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IOPORT(W_TXBusy) &= ~(1<<busybit);
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IOPORT(W_TXBusy) &= ~(1<<num);
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switch (num)
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{
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case 0:
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case 2:
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case 3:
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IOPORT(W_TXStat) = 0x0001 | ((num?(num-1):0)<<12);
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SetIRQ(1);
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IOPORT(W_TXSlotLoc1 + ((num?(num-1):0)*4)) &= 0x7FFF;
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break;
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case 4: // beacon
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if (IOPORT(W_TXStatCnt) & 0x8000)
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{
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IOPORT(W_TXStat) = 0x0301;
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SetIRQ(1);
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}
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break;
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}
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FireTX();
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}
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break;
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}
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@ -299,18 +378,33 @@ void ProcessTX(TXSlot* slot, int busybit)
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void CheckRX()
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{
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if (!(IOPORT(W_RXCnt) & 0x8000))
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return;
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int rxlen = Platform::MP_RecvPacket(RXBuffer, false);
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if (rxlen < 12+24) return;
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u16 framelen = *(u16*)&RXBuffer[10];
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if (framelen != rxlen-12)
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{
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printf("bad frame length\n");
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return;
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}
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framelen -= 4;
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u16 framectl = *(u16*)&RXBuffer[12+0];
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u8 txrate = RXBuffer[8];
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u32 a_src, a_dst, a_bss;
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u16 rxflags = 0x0010;
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switch (framectl & 0x000C)
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{
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case 0x0000: // management:
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case 0x0000: // management
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a_src = 10;
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a_dst = 4;
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a_bss = 16;
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if ((framectl & 0x00F0) == 0x0080)
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rxflags |= 0x0001;
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break;
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case 0x0004: // control
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@ -339,12 +433,57 @@ void CheckRX()
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printf("blarg\n");
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return;
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}
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rxflags |= 0x0008;
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break;
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}
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if (MACEqual(&RXBuffer[12 + a_src], (u8*)&IOPORT(W_MACAddr0)))
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return; // oops. we received a packet we just sent.
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bool bssidmatch = MACEqual(&RXBuffer[12 + a_bss], (u8*)&IOPORT(W_BSSID0));
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if (!(IOPORT(W_BSSID0) & 0x0001) && !(RXBuffer[12 + a_bss] & 0x01) &&
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!bssidmatch)
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return;
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if (framectl != 0x0080)
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printf("wifi: received packet. framectrl=%04X\n", framectl);
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// make RX header
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if (bssidmatch) rxflags |= 0x8000;
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*(u16*)&RXBuffer[0] = rxflags;
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*(u16*)&RXBuffer[2] = 0x0040; // ???
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*(u16*)&RXBuffer[4] = 0x7777;
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*(u16*)&RXBuffer[6] = txrate;
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*(u16*)&RXBuffer[8] = framelen;
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*(u16*)&RXBuffer[10] = 0x4080; // min/max RSSI. dunno
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RXTime = framelen * ((txrate==0x14) ? 4:8);
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// TODO: write packet progressively?
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// TODO: RX/TX addr register
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framelen += 12;
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u16 addr = IOPORT(W_RXBufWriteCursor) << 1;
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for (int i = 0; i < framelen; i += 2)
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{
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*(u16*)&RAM[addr] = *(u16*)&RXBuffer[i];
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addr += 2;
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if (addr == (IOPORT(W_RXBufEnd) & 0x1FFE))
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addr = (IOPORT(W_RXBufBegin) & 0x1FFE);
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if (addr == (IOPORT(W_RXBufReadCursor) << 1))
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{
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printf("wifi: RX buffer full\n");
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// TODO: proper error management
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return;
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}
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}
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RXEndAddr = ((addr >> 1) + 1) & ~0x1;
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SetIRQ(6);
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}
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@ -362,6 +501,7 @@ void MSTimer()
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if (IOPORT(W_BeaconCount2) == 0) SetIRQ13();
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}
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if (!IOPORT(W_TXBusy))
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CheckRX();
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}
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@ -387,7 +527,23 @@ void USTimer(u32 param)
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IOPORT(W_ContentFree)--;
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u16 txbusy = IOPORT(W_TXBusy);
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if (txbusy)
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{
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if (txbusy & 0x0010) ProcessTX(&TXSlots[4], 4);
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else if (txbusy & 0x0008) ProcessTX(&TXSlots[3], 3);
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else if (txbusy & 0x0004) ProcessTX(&TXSlots[2], 2);
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// TODO CMD
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else if (txbusy & 0x0001) ProcessTX(&TXSlots[0], 0);
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}
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else if (RXTime)
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{
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RXTime--;
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if (RXTime == 0)
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{
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IOPORT(W_RXBufWriteCursor) = RXEndAddr;
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SetIRQ(0);
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}
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}
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// TODO: make it more accurate, eventually
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// in the DS, the wifi system has its own 22MHz clock and doesn't use the system clock
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@ -712,10 +868,22 @@ void Write(u32 addr, u16 val)
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break;
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case W_RXBufGapSize:
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case W_RXBufCount:
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case W_RXBufWriteAddr:
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case W_RXBufReadCursor:
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val &= 0x0FFF;
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break;
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case W_TXReqReset:
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IOPORT(W_TXReqRead) &= ~val;
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return;
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case W_TXReqSet:
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IOPORT(W_TXReqRead) |= val;
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IOPORT(W_TXBusy) |= (val & 0x000F);
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FireTX();
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// CHECKME!!!!!!!!!!!
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return;
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case W_TXSlotReset:
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if (val & 0x0001) IOPORT(W_TXSlotLoc1) &= 0x7FFF;
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if (val & 0x0002) IOPORT(W_TXSlotCmd) &= 0x7FFF;
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@ -759,6 +927,14 @@ void Write(u32 addr, u16 val)
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val &= 0x0FFF;
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break;
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case 0x090:
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case 0x0A0:
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case 0x0A4:
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case 0x0A8:
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case 0x094:
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printf("wifi: trying to send packet. %08X=%04X\n", addr, val);
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break;
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// read-only ports
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case 0x000:
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case 0x044:
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