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/*
* PSn00bSDK CD drive library (sector DMA API)
* (C) 2022 spicyjpeg - MPL licensed
*/
#include <stdint.h>
#include <psxcd.h>
#include <hwregs_c.h>
#define DATA_SYNC_TIMEOUT 0x100000
/* Private utilities */
#ifdef NDEBUG
#define _LOG(...)
#else
#define _LOG(...) printf(__VA_ARGS__)
#endif
/* DMA transfer functions */
int CdGetSector(void *madr, int size) {
//while (!(CD_STAT & (1 << 6)))
//__asm__ volatile("");
DMA_MADR(3) = (uint32_t) madr;
DMA_BCR(3) = size | (1 << 16);
DMA_CHCR(3) = 0x11000000;
while (DMA_CHCR(3) & (1 << 24))
__asm__ volatile("");
return 1;
}
int CdGetSector2(void *madr, int size) {
//while (!(CD_STAT & (1 << 6)))
//__asm__ volatile("");
DMA_MADR(3) = (uint32_t) madr;
DMA_BCR(3) = size | (1 << 16);
DMA_CHCR(3) = 0x11400100; // Transfer 1 word every 16 CPU cycles
return 1;
}
int CdDataSync(int mode) {
if (mode)
return (DMA_CHCR(3) >> 24) & 1;
for (int i = DATA_SYNC_TIMEOUT; i; i--) {
if (!(DMA_CHCR(3) & (1 << 24)))
return 0;
}
_LOG("psxcd: CdDataSync() timeout\n");
return -1;
}
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