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/*
* PSn00bSDK CD-ROM library (misc. functions)
* (C) 2020-2022 Lameguy64, spicyjpeg - MPL licensed
*/
#include <stdint.h>
#include <string.h>
#include <assert.h>
#include <psxetc.h>
#include <psxcd.h>
#include <hwregs_c.h>
#define DATA_SYNC_TIMEOUT 0x100000
/* Unlock command strings */
static const char *_unlock_strings[] = {
"",
"Licensed by",
"Sony",
"Computer",
"Entertainment",
"",
""
};
static const char *const _unlock_regions[] = {
"of America", // CdlRegionSCEA
"(Europe)", // CdlRegionSCEE
"World wide" // CdlRegionSCEW
};
/* Sector DMA transfer functions */
int CdGetSector(void *madr, int size) {
_sdk_validate_args(madr && (size > 0), 0);
//while (!(CD_REG(0) & (1 << 6)))
//__asm__ volatile("");
DMA_MADR(DMA_CD) = (uint32_t) madr;
DMA_BCR(DMA_CD) = size | (1 << 16);
DMA_CHCR(DMA_CD) = 0x11000000;
while (DMA_CHCR(DMA_CD) & (1 << 24))
__asm__ volatile("");
return 1;
}
int CdGetSector2(void *madr, int size) {
_sdk_validate_args(madr && (size > 0), 0);
//while (!(CD_REG(0) & (1 << 6)))
//__asm__ volatile("");
DMA_MADR(DMA_CD) = (uint32_t) madr;
DMA_BCR(DMA_CD) = size | (1 << 16);
DMA_CHCR(DMA_CD) = 0x11400100; // Transfer 1 word every 16 CPU cycles
return 1;
}
int CdDataSync(int mode) {
if (mode)
return (DMA_CHCR(DMA_CD) >> 24) & 1;
for (int i = DATA_SYNC_TIMEOUT; i; i--) {
if (!(DMA_CHCR(DMA_CD) & (1 << 24)))
return 0;
}
_sdk_log("CdDataSync() timeout, CHCR=0x%08x\n", DMA_CHCR(DMA_CD));
return -1;
}
/* LBA/MSF conversion */
CdlLOC *CdIntToPos(int i, CdlLOC *p) {
i += 150;
p->minute = itob(i / (75 * 60));
p->second = itob((i / 75) % 60);
p->sector = itob(i % 75);
return p;
}
int CdPosToInt(const CdlLOC *p) {
return (
(btoi(p->minute) * (75 * 60)) +
(btoi(p->second) * 75) +
btoi(p->sector)
) - 150;
}
/* Drive unlocking API */
CdlRegionCode CdGetRegion(void) {
uint8_t param;
uint8_t result[16];
// Firmware version C0 does not support test command 0x22 to retrieve the
// region, but it was only used in the SCPH-1000 Japanese model. Version D1
// (and possibly others?) is used in debug consoles.
// https://psx-spx.consoledev.net/cdromdrive/#19h20h-int3yymmddver
// https://psx-spx.consoledev.net/cdromdrive/#19h22h-int3for-europe
param = 0x20;
memset(result, 0, 4);
if (!CdCommand(CdlTest, ¶m, 1, result)) {
_sdk_log("failed to probe drive firmware version\n");
return CdlRegionUnknown;
}
_sdk_log("drive firmware version: 0x%02x\n", result[3]);
if (result[3] == 0xc0)
return CdlRegionSCEI;
if (result[3] >= 0xd0)
return CdlRegionDebug;
param = 0x22;
memset(result, 0, 16);
if (!CdCommand(CdlTest, ¶m, 1, result)) {
_sdk_log("failed to probe drive region\n");
return CdlRegionUnknown;
}
_sdk_log("drive region: %s\n", result);
if (!strcmp(result, "for Japan"))
return CdlRegionSCEI;
if (!strcmp(result, "for U/C"))
return CdlRegionSCEA;
if (!strcmp(result, "for Europe"))
return CdlRegionSCEE;
if (!strcmp(result, "for NETNA") || !strcmp(result, "for NETEU"))
return CdlRegionSCEW;
if (!strcmp(result, "for US/AEP"))
return CdlRegionDebug;
return CdlRegionUnknown;
}
int CdUnlock(CdlRegionCode region) {
if (region <= CdlRegionSCEI)
return 0;
if (region >= CdlRegionDebug)
return 1;
// This is by far the most efficient way to do it.
_unlock_strings[5] = _unlock_regions[region - CdlRegionSCEA];
for (int i = 0; i < 7; i++) {
uint8_t result[4];
if (!CdCommand(
0x50 + i,
_unlock_strings[i],
strlen(_unlock_strings[i]),
result
))
return 0;
if (!(result[0] & CdlStatError) || (result[1] != 0x40)) {
_sdk_log("unlock failed, status=0x%02x, code=0x%02x\n", result[0], result[1]);
return 0;
}
}
_sdk_log("unlock successful\n");
return CdCommand(CdlNop, 0, 0, 0);
}
/* Misc. functions */
int CdGetToc(CdlLOC *toc) {
_sdk_validate_args(toc, 0);
uint8_t result[4];
if (!CdCommand(CdlGetTN, 0, 0, result))
return 0;
if (CdSync(1, 0) != CdlComplete)
return 0;
int first = btoi(result[1]);
int tracks = btoi(result[2]) + 1 - first;
//assert(first == 1);
for (int i = 0; i < tracks; i++) {
uint8_t track = itob(first + i);
if (!CdCommand(CdlGetTD, &track, 1, result))
return 0;
if (CdSync(1, 0) != CdlComplete)
return 0;
toc[i].minute = result[1];
toc[i].second = result[2];
toc[i].sector = 0;
toc[i].track = track;
}
return tracks;
}
int CdMix(const CdlATV *vol) {
_sdk_validate_args(vol, 0);
CD_REG(0) = 2;
CD_REG(2) = vol->val0;
CD_REG(3) = vol->val1;
CD_REG(0) = 3;
CD_REG(1) = vol->val2;
CD_REG(2) = vol->val3;
CD_REG(3) = 0x20; // Unmute XA, apply volume changes
return 1;
}
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