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#include <revolution.h>
#include <revolution/os.h>
#include <cstring>
#include "__os.h"
// prototypes
void __AIClockInit(u32);
static u8 DSPInitCode[128] = {
0x02, 0x9F, 0x00, 0x10, 0x02, 0x9F, 0x00, 0x33, 0x02, 0x9F, 0x00, 0x34, 0x02, 0x9F, 0x00, 0x35,
0x02, 0x9F, 0x00, 0x36, 0x02, 0x9F, 0x00, 0x37, 0x02, 0x9F, 0x00, 0x38, 0x02, 0x9F, 0x00, 0x39,
0x12, 0x06, 0x12, 0x03, 0x12, 0x04, 0x12, 0x05, 0x00, 0x80, 0x80, 0x00, 0x00, 0x88, 0xFF, 0xFF,
0x00, 0x84, 0x10, 0x00, 0x00, 0x64, 0x00, 0x1D, 0x02, 0x18, 0x00, 0x00, 0x81, 0x00, 0x1C, 0x1E,
0x00, 0x44, 0x1B, 0x1E, 0x00, 0x84, 0x08, 0x00, 0x00, 0x64, 0x00, 0x27, 0x19, 0x1E, 0x00, 0x00,
0x00, 0xDE, 0xFF, 0xFC, 0x02, 0xA0, 0x80, 0x00, 0x02, 0x9C, 0x00, 0x28, 0x16, 0xFC, 0x00, 0x54,
0x16, 0xFD, 0x43, 0x48, 0x00, 0x21, 0x02, 0xFF, 0x02, 0xFF, 0x02, 0xFF, 0x02, 0xFF, 0x02, 0xFF,
0x02, 0xFF, 0x02, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
static void waitMicroSec(u32 usec) {
OSTick start_tick = OSGetTick();
while (OSTicksToMicroseconds(OSGetTick() - start_tick) < usec);
}
#define PPCACR_OFFSET (OS_BASE_UNCACHED + 0x800000)
#define PPCACR (0xD000000 + PPCACR_OFFSET)
#define busRd32(addr) (*(volatile u32 *)(addr))
#define busWrt32(addr, val) (*(volatile u32 *)(addr)) = (val)
void __AIClockInit(u32 compatB) {
u32 reg;
reg = busRd32(PPCACR + 0x180);
reg &= ~((u32)1 << 8);
reg |= ((u32)compatB << 8);
reg &= ~((u32)1 << 7);
busWrt32(PPCACR + 0x180, reg);
reg = busRd32(PPCACR + 0x1D0);
reg &= ~((u32)1 << 31);
reg &= ~((u32)1 << 30);
busWrt32(PPCACR + 0x1D0, reg);
waitMicroSec(100);
if (compatB == 0) {
reg = busRd32(PPCACR + 0x1CC);
reg &= ~0x3FFC0;
reg |= ((u32)63 << 6);
reg &= ~0x3F;
reg &= ~0x7FC0000;
reg |= ((u32)281 << 18);
busWrt32(PPCACR + 0x1CC, reg);
} else {
reg = busRd32(PPCACR + 0x1CC);
reg &= ~0x3FFC0;
reg |= ((u32)1023 << 6);
reg &= ~0x3F;
reg |= ((u32)14);
reg &= ~0x7FC0000;
reg |= ((u32)300 << 18);
busWrt32(PPCACR + 0x1CC, reg);
}
waitMicroSec(100);
reg = busRd32(PPCACR + 0x1D0);
reg &= ~((u32)1 << 28);
busWrt32(PPCACR + 0x1D0, reg);
waitMicroSec(1000);
reg = busRd32(PPCACR + 0x1D0);
reg &= ~((u32)1 << 30);
reg |= ((u32)1 << 30);
busWrt32(PPCACR + 0x1D0, reg);
waitMicroSec(1000);
reg = busRd32(PPCACR + 0x1D0);
reg &= ~((u32)1 << 31);
reg |= ((u32)1 << 31);
busWrt32(PPCACR + 0x1D0, reg);
waitMicroSec(1000);
}
#define __DSPWorkBuffer (void*)0x81000000
void __OSInitAudioSystem(void) {
u8 errFlag;
u16 reg16;
u32 start_tick;
if (!__OSInIPL) {
__AIClockInit(1);
}
memcpy((void*)((u32)OSGetArenaHi() - 0x80), __DSPWorkBuffer, sizeof(DSPInitCode));
memcpy(__DSPWorkBuffer, (void*)DSPInitCode, sizeof(DSPInitCode));
DCFlushRange(__DSPWorkBuffer, sizeof(DSPInitCode));
__DSPRegs[9] = 0x43;
ASSERTMSGLINE(253, !(__DSPRegs[5] & 0x200), "__OSInitAudioSystem(): ARAM DMA already in progress");
ASSERTMSGLINE(257, !(__DSPRegs[5] & 0x400), "__OSInitAudioSystem(): DSP DMA already in progress");
ASSERTMSGLINE(261, (__DSPRegs[5] & 0x004), "__OSInitAudioSystem(): DSP already working");
__DSPRegs[5] = 0x8AC;
__DSPRegs[5] |= 1;
while (__DSPRegs[5] & 1);
__DSPRegs[0] = 0;
while (((__DSPRegs[2] << 16) | __DSPRegs[3]) & 0x80000000);
*(u32*)&__DSPRegs[16] = 0x1000000;
*(u32*)&__DSPRegs[18] = 0;
*(u32*)&__DSPRegs[20] = 0x20;
reg16 = __DSPRegs[5];
while (!(reg16 & 0x20))
reg16 = __DSPRegs[5];
__DSPRegs[5] = reg16;
start_tick = OSGetTick();
while ((s32)(OSGetTick() - start_tick) < 0x892);
*(u32*)&__DSPRegs[16] = 0x1000000;
*(u32*)&__DSPRegs[18] = 0;
*(u32*)&__DSPRegs[20] = 0x20;
reg16 = __DSPRegs[5];
while (!(reg16 & 0x20)) {
reg16 = __DSPRegs[5];
}
__DSPRegs[5] = reg16;
__DSPRegs[5] &= ~0x800;
while ((__DSPRegs[5]) & 0x400);
__DSPRegs[5] &= ~4;
errFlag = 0;
reg16 = __DSPRegs[2];
while (!(reg16 & 0x8000)) {
reg16 = __DSPRegs[2];
}
if(((u32)((reg16 << 16) | __DSPRegs[3]) + 0x7FAC0000U) != 0x4348) {
ASSERTMSGLINE(333, 0, "__OSInitAudioSystem(): DSP returns invalid message");
}
__DSPRegs[5] |= 4;
__DSPRegs[5] = 0x8AC;
__DSPRegs[5] |= 1;
while (__DSPRegs[5] & 1);
memcpy(__DSPWorkBuffer, (void*)((u32)OSGetArenaHi() - 0x80), sizeof(DSPInitCode));
}
void __OSStopAudioSystem(void) {
u16 reg16;
u32 start_tick;
#define waitUntil(load, mask) \
reg16 = (load); \
while (reg16 & (mask)) { \
reg16 = (load); \
}
__DSPRegs[5] = 0x804;
reg16 = __DSPRegs[27];
__DSPRegs[27] = reg16 & ~0x8000;
waitUntil(__DSPRegs[5], 0x400);
waitUntil(__DSPRegs[5], 0x200);
__DSPRegs[5] = 0x8ac;
__DSPRegs[0] = 0;
while (((__DSPRegs[2] << 16) | __DSPRegs[3]) & 0x80000000);
start_tick = OSGetTick();
while ((s32)(OSGetTick() - start_tick) < 0x2c);
reg16 = __DSPRegs[5];
__DSPRegs[5] = reg16 | 1;
waitUntil(__DSPRegs[5], 0x001);
#undef waitUntil
}
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