ref: b259b105d7df69edf839bef1100904fbe6a688a2
dir: /psx/dev/cdrom.c/
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "cdrom.h"
#include "../log.h"
#define RESP_PUSH(data) \
cdrom->rfifo[cdrom->rfifo_index++] = data; \
SET_BITS(status, STAT_RSLRRDY_MASK, STAT_RSLRRDY_MASK);
#define PFIFO_POP (cdrom->pfifo[--cdrom->pfifo_index])
uint8_t cdrom_btoi(uint8_t b) {
return ((b >> 4) * 10) + (b & 0xf);
}
// #define BTOI(b) cdrom_btoi(b)
#define BTOI(b) g_psx_cdrom_btoi_table[b]
static const uint8_t g_psx_cdrom_btoi_table[] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11,
0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b,
0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25,
0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41,
0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43,
0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b,
0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d,
0x4e, 0x4f, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55,
0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 0x60, 0x61,
0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b,
0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73,
0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75,
0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d,
0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91,
0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93,
0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b,
0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d,
0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5,
};
void cdrom_cmd_error(psx_cdrom_t* cdrom) {
SET_BITS(ifr, IFR_INT, IFR_INT5);
RESP_PUSH(cdrom->error);
RESP_PUSH(GETSTAT_MOTOR | cdrom->error_flags);
cdrom->pfifo_index = 0;
cdrom->delayed_command = CDL_NONE;
cdrom->state = CD_STATE_RECV_CMD;
}
void cdrom_cmd_unimplemented(psx_cdrom_t* cdrom) {
log_fatal("Unimplemented CDROM command (%u)", cdrom->command);
exit(1);
}
void cdrom_cmd_getstat(psx_cdrom_t* cdrom) {
cdrom->delayed_command = CDL_NONE;
switch (cdrom->state) {
case CD_STATE_RECV_CMD: {
if (cdrom->pfifo_index) {
log_fatal("CdlGetStat: Expected exactly 0 parameters");
cdrom->irq_delay = DELAY_1MS;
cdrom->delayed_command = CDL_ERROR;
cdrom->state = CD_STATE_ERROR;
cdrom->error = ERR_PCOUNT;
cdrom->error_flags = GETSTAT_ERROR;
return;
}
cdrom->irq_delay = DELAY_1MS;
cdrom->delayed_command = CDL_GETSTAT;
cdrom->state = CD_STATE_SEND_RESP1;
} break;
case CD_STATE_SEND_RESP1: {
cdrom->delayed_command = CDL_NONE;
SET_BITS(ifr, IFR_INT, IFR_INT3);
RESP_PUSH(GETSTAT_MOTOR | (cdrom->disc ? 0 : GETSTAT_TRAYOPEN));
cdrom->state = CD_STATE_RECV_CMD;
} break;
}
}
void cdrom_cmd_setloc(psx_cdrom_t* cdrom) {
switch (cdrom->state) {
case CD_STATE_RECV_CMD: {
if (cdrom->pfifo_index != 3) {
log_fatal("CdlSetloc: Expected exactly 3 parameters, got %u instead",
cdrom->pfifo_index
);
cdrom->irq_delay = DELAY_1MS;
cdrom->delayed_command = CDL_ERROR;
cdrom->state = CD_STATE_ERROR;
cdrom->error = ERR_PCOUNT;
cdrom->error_flags = GETSTAT_ERROR;
return;
}
if (!cdrom->read_ongoing) {
cdrom->irq_delay = DELAY_1MS;
cdrom->delayed_command = CDL_SETLOC;
cdrom->state = CD_STATE_SEND_RESP1;
}
cdrom->seek_sect = BTOI(PFIFO_POP);
cdrom->seek_ss = BTOI(PFIFO_POP);
cdrom->seek_mm = BTOI(PFIFO_POP);
// Account for 2 second gap
uint32_t seconds = (cdrom->seek_mm * 60) + cdrom->seek_ss - 2;
uint32_t sectors = (seconds * CD_SECTORS_PER_SECOND) + cdrom->seek_sect;
cdrom->seek_offset = sectors * CD_SECTOR_SIZE;
log_fatal("setloc: %02u:%02u:%02u (%08x)",
cdrom->seek_mm,
cdrom->seek_ss,
cdrom->seek_sect,
cdrom->seek_offset
);
} break;
case CD_STATE_SEND_RESP1: {
cdrom->delayed_command = CDL_NONE;
SET_BITS(ifr, IFR_INT, IFR_INT3);
RESP_PUSH(cdrom->stat);
cdrom->state = CD_STATE_RECV_CMD;
} break;
}
}
void cdrom_cmd_readn(psx_cdrom_t* cdrom) {
cdrom->delayed_command = CDL_NONE;
switch (cdrom->state) {
case CD_STATE_RECV_CMD: {
log_fatal("CdlReadN: CD_STATE_RECV_CMD");
cdrom->irq_delay = DELAY_1MS;
cdrom->state = CD_STATE_SEND_RESP1;
cdrom->delayed_command = CDL_READN;
} break;
case CD_STATE_SEND_RESP1: {
log_fatal("CdlReadN: CD_STATE_SEND_RESP1");
SET_BITS(ifr, IFR_INT, IFR_INT3);
RESP_PUSH(GETSTAT_MOTOR);
fseek(cdrom->disc, cdrom->seek_offset, 0);
int double_speed = cdrom->mode & MODE_SPEED;
cdrom->irq_delay = double_speed ? READ_DOUBLE_DELAY : READ_SINGLE_DELAY;
cdrom->state = CD_STATE_SEND_RESP2;
cdrom->delayed_command = CDL_READN;
if (cdrom->spin_delay) {
cdrom->irq_delay += cdrom->spin_delay;
cdrom->spin_delay = 0;
}
} break;
case CD_STATE_SEND_RESP2: {
cdrom->read_ongoing = 1;
log_fatal("CdlReadN: CD_STATE_SEND_RESP2");
SET_BITS(ifr, IFR_INT, IFR_INT1);
RESP_PUSH(GETSTAT_MOTOR | GETSTAT_READ);
log_fatal("Reading data from disc. offset=%02x:%02x:%02x (%08x, tellg=%08x)",
cdrom->seek_mm, cdrom->seek_ss, cdrom->seek_sect,
cdrom->seek_offset, ftell(cdrom->disc)
);
cdrom->dfifo_index = 0;
fread(cdrom->dfifo, 1, CD_SECTOR_SIZE, cdrom->disc);
int double_speed = cdrom->mode & MODE_SPEED;
cdrom->irq_delay = double_speed ? READ_DOUBLE_DELAY : READ_SINGLE_DELAY;
cdrom->state = CD_STATE_SEND_RESP2;
cdrom->delayed_command = CDL_READN;
} break;
}
}
void cdrom_cmd_stop(psx_cdrom_t* cdrom) { log_fatal("stop: Unimplemented"); exit(1); }
void cdrom_cmd_pause(psx_cdrom_t* cdrom) {
cdrom->delayed_command = CDL_NONE;
switch (cdrom->state) {
case CD_STATE_RECV_CMD: {
cdrom->read_ongoing = 0;
cdrom->irq_delay = DELAY_1MS;
cdrom->state = CD_STATE_SEND_RESP1;
cdrom->delayed_command = CDL_PAUSE;
} break;
case CD_STATE_SEND_RESP1: {
SET_BITS(ifr, IFR_INT, 3);
RESP_PUSH(GETSTAT_MOTOR | GETSTAT_READ);
int double_speed = cdrom->mode & MODE_SPEED;
cdrom->irq_delay = DELAY_1MS * (double_speed ? 70 : 35);
cdrom->state = CD_STATE_SEND_RESP2;
cdrom->delayed_command = CDL_PAUSE;
} break;
case CD_STATE_SEND_RESP2: {
SET_BITS(ifr, IFR_INT, 2);
RESP_PUSH(GETSTAT_MOTOR);
cdrom->state = CD_STATE_RECV_CMD;
cdrom->delayed_command = CDL_NONE;
} break;
}
}
void cdrom_cmd_init(psx_cdrom_t* cdrom) {
cdrom->delayed_command = CDL_NONE;
switch (cdrom->state) {
case CD_STATE_RECV_CMD: {
cdrom->irq_delay = DELAY_1MS;
cdrom->state = CD_STATE_SEND_RESP1;
cdrom->delayed_command = CDL_INIT;
cdrom->read_ongoing = 0;
} break;
case CD_STATE_SEND_RESP1: {
SET_BITS(ifr, IFR_INT, 3);
RESP_PUSH(cdrom->stat);
cdrom->irq_delay = DELAY_1MS;
cdrom->state = CD_STATE_SEND_RESP2;
cdrom->delayed_command = CDL_INIT;
} break;
case CD_STATE_SEND_RESP2: {
SET_BITS(ifr, IFR_INT, 2);
RESP_PUSH(cdrom->stat);
cdrom->state = CD_STATE_RECV_CMD;
cdrom->delayed_command = CDL_NONE;
} break;
}
}
void cdrom_cmd_unmute(psx_cdrom_t* cdrom) {
cdrom->delayed_command = CDL_NONE;
switch (cdrom->state) {
case CD_STATE_RECV_CMD: {
if (cdrom->pfifo_index) {
log_fatal("CdlUnmute: Expected exactly 0 parameters");
cdrom->irq_delay = DELAY_1MS;
cdrom->delayed_command = CDL_ERROR;
cdrom->state = CD_STATE_ERROR;
cdrom->error = ERR_PCOUNT;
cdrom->error_flags = GETSTAT_ERROR;
return;
}
cdrom->irq_delay = DELAY_1MS;
cdrom->delayed_command = CDL_DEMUTE;
cdrom->state = CD_STATE_SEND_RESP1;
} break;
case CD_STATE_SEND_RESP1: {
SET_BITS(ifr, IFR_INT, IFR_INT3);
RESP_PUSH(cdrom->stat);
cdrom->delayed_command = CDL_NONE;
cdrom->state = CD_STATE_RECV_CMD;
} break;
}
}
void cdrom_cmd_setfilter(psx_cdrom_t* cdrom) {
cdrom->delayed_command = CDL_NONE;
switch (cdrom->state) {
case CD_STATE_RECV_CMD: {
if (cdrom->pfifo_index != 2) {
log_fatal("CdlSetfilter: Expected exactly 2 parameter");
cdrom->irq_delay = DELAY_1MS;
cdrom->delayed_command = CDL_ERROR;
cdrom->state = CD_STATE_ERROR;
cdrom->error = ERR_PCOUNT;
cdrom->error_flags = GETSTAT_ERROR;
return;
}
cdrom->pfifo_index = 0;
cdrom->irq_delay = DELAY_1MS;
cdrom->delayed_command = CDL_SETFILTER;
cdrom->state = CD_STATE_SEND_RESP1;
} break;
case CD_STATE_SEND_RESP1: {
cdrom->delayed_command = CDL_NONE;
SET_BITS(ifr, IFR_INT, IFR_INT3);
RESP_PUSH(cdrom->stat);
cdrom->state = CD_STATE_RECV_CMD;
} break;
}
}
void cdrom_cmd_setmode(psx_cdrom_t* cdrom) {
cdrom->delayed_command = CDL_NONE;
switch (cdrom->state) {
case CD_STATE_RECV_CMD: {
if (cdrom->pfifo_index != 1) {
log_fatal("CdlSetmode: Expected exactly 1 parameter");
cdrom->irq_delay = DELAY_1MS;
cdrom->delayed_command = CDL_ERROR;
cdrom->state = CD_STATE_ERROR;
cdrom->error = ERR_PCOUNT;
cdrom->error_flags = GETSTAT_ERROR;
return;
}
int prev_speed = cdrom->mode & MODE_SPEED;
cdrom->mode = PFIFO_POP;
if ((cdrom->mode & MODE_SPEED) != prev_speed)
cdrom->spin_delay = DELAY_1MS * 650;
cdrom->irq_delay = DELAY_1MS;
cdrom->delayed_command = CDL_SETMODE;
cdrom->state = CD_STATE_SEND_RESP1;
} break;
case CD_STATE_SEND_RESP1: {
cdrom->delayed_command = CDL_NONE;
SET_BITS(ifr, IFR_INT, IFR_INT3);
RESP_PUSH(cdrom->stat);
cdrom->state = CD_STATE_RECV_CMD;
} break;
}
}
void cdrom_cmd_getlocl(psx_cdrom_t* cdrom) { log_fatal("getlocl: Unimplemented"); exit(1); }
void cdrom_cmd_getlocp(psx_cdrom_t* cdrom) { log_fatal("getlocp: Unimplemented"); exit(1); }
void cdrom_cmd_gettn(psx_cdrom_t* cdrom) {
cdrom->delayed_command = CDL_NONE;
switch (cdrom->state) {
case CD_STATE_RECV_CMD: {
if (cdrom->pfifo_index) {
log_fatal("CdlGetTN: Expected exactly 0 parameters");
cdrom->irq_delay = DELAY_1MS;
cdrom->delayed_command = CDL_ERROR;
cdrom->state = CD_STATE_ERROR;
cdrom->error = ERR_PCOUNT;
cdrom->error_flags = GETSTAT_ERROR;
return;
}
cdrom->irq_delay = DELAY_1MS;
cdrom->delayed_command = CDL_GETTN;
cdrom->state = CD_STATE_SEND_RESP1;
} break;
case CD_STATE_SEND_RESP1: {
SET_BITS(ifr, IFR_INT, IFR_INT3);
RESP_PUSH(0x14);
RESP_PUSH(0x01);
RESP_PUSH(GETSTAT_MOTOR);
cdrom->delayed_command = CDL_NONE;
cdrom->state = CD_STATE_RECV_CMD;
} break;
}
}
void cdrom_cmd_gettd(psx_cdrom_t* cdrom) {
cdrom->delayed_command = CDL_NONE;
switch (cdrom->state) {
case CD_STATE_RECV_CMD: {
if (cdrom->pfifo_index != 1) {
log_fatal("CdlGetTD: Expected exactly 0 parameters");
cdrom->irq_delay = DELAY_1MS;
cdrom->delayed_command = CDL_ERROR;
cdrom->state = CD_STATE_ERROR;
cdrom->error = ERR_PCOUNT;
cdrom->error_flags = GETSTAT_ERROR;
return;
}
int track = PFIFO_POP;
cdrom->irq_delay = DELAY_1MS;
cdrom->delayed_command = CDL_GETTD;
cdrom->state = CD_STATE_SEND_RESP1;
} break;
case CD_STATE_SEND_RESP1: {
SET_BITS(ifr, IFR_INT, IFR_INT3);
RESP_PUSH(0x14);
RESP_PUSH(0x01);
RESP_PUSH(GETSTAT_MOTOR);
cdrom->delayed_command = CDL_NONE;
cdrom->state = CD_STATE_RECV_CMD;
} break;
}
}
void cdrom_cmd_seekl(psx_cdrom_t* cdrom) {
cdrom->delayed_command = CDL_NONE;
switch (cdrom->state) {
case CD_STATE_RECV_CMD: {
cdrom->irq_delay = DELAY_1MS;
cdrom->state = CD_STATE_SEND_RESP1;
cdrom->delayed_command = CDL_SEEKL;
log_fatal("seekl: Seeking to address %08x", cdrom->seek_offset);
fseek(cdrom->disc, cdrom->seek_offset, 0);
} break;
case CD_STATE_SEND_RESP1: {
SET_BITS(ifr, IFR_INT, 3);
RESP_PUSH(GETSTAT_MOTOR);
cdrom->irq_delay = DELAY_1MS;
cdrom->state = CD_STATE_SEND_RESP2;
cdrom->delayed_command = CDL_SEEKL;
} break;
case CD_STATE_SEND_RESP2: {
SET_BITS(ifr, IFR_INT, 2);
RESP_PUSH(GETSTAT_MOTOR);
cdrom->state = CD_STATE_RECV_CMD;
cdrom->delayed_command = CDL_NONE;
} break;
}
}
void cdrom_cmd_seekp(psx_cdrom_t* cdrom) { log_fatal("seekp: Unimplemented"); exit(1); }
void cdrom_cmd_test(psx_cdrom_t* cdrom) {
cdrom->delayed_command = CDL_NONE;
switch (cdrom->state) {
case CD_STATE_RECV_CMD: {
if (cdrom->pfifo_index != 1) {
log_fatal("CdlTest: Expected exactly 1 parameter");
cdrom->irq_delay = DELAY_1MS;
cdrom->delayed_command = CDL_ERROR;
cdrom->state = CD_STATE_ERROR;
cdrom->error = ERR_PCOUNT;
cdrom->error_flags = GETSTAT_ERROR;
return;
}
if (PFIFO_POP != 0x20) {
log_fatal("CdlTest: Unhandled subcommand");
cdrom->irq_delay = DELAY_1MS;
cdrom->delayed_command = CDL_ERROR;
cdrom->state = CD_STATE_ERROR;
cdrom->error = ERR_INVSUBF;
return;
}
cdrom->irq_delay = DELAY_1MS;
cdrom->delayed_command = CDL_TEST;
cdrom->state = CD_STATE_SEND_RESP1;
} break;
case CD_STATE_SEND_RESP1: {
cdrom->delayed_command = CDL_NONE;
SET_BITS(ifr, IFR_INT, IFR_INT3);
RESP_PUSH(0x01);
RESP_PUSH(0x95);
RESP_PUSH(0x13);
RESP_PUSH(0x03);
cdrom->state = CD_STATE_RECV_CMD;
} break;
}
}
void cdrom_cmd_getid(psx_cdrom_t* cdrom) {
cdrom->delayed_command = CDL_NONE;
switch (cdrom->state) {
case CD_STATE_RECV_CMD: {
if (cdrom->pfifo_index) {
log_fatal("CdlGetID: Expected exactly 0 parameters");
cdrom->irq_delay = DELAY_1MS;
cdrom->delayed_command = CDL_ERROR;
cdrom->state = CD_STATE_ERROR;
cdrom->error = ERR_PCOUNT;
cdrom->error_flags = GETSTAT_ERROR;
return;
}
cdrom->irq_delay = DELAY_1MS;
cdrom->state = CD_STATE_SEND_RESP1;
cdrom->delayed_command = CDL_GETID;
} break;
case CD_STATE_SEND_RESP1: {
SET_BITS(ifr, IFR_INT, 3);
RESP_PUSH(GETSTAT_MOTOR);
cdrom->irq_delay = DELAY_1MS;
cdrom->state = CD_STATE_SEND_RESP2;
cdrom->delayed_command = CDL_GETID;
} break;
case CD_STATE_SEND_RESP2: {
SET_BITS(ifr, IFR_INT, 2);
if (cdrom->disc) {
RESP_PUSH(0x41);
RESP_PUSH(0x45);
RESP_PUSH(0x43);
RESP_PUSH(0x53);
RESP_PUSH(0x00);
RESP_PUSH(0x20);
RESP_PUSH(0x00);
RESP_PUSH(0x02);
} else {
RESP_PUSH(0x00);
RESP_PUSH(0x00);
RESP_PUSH(0x00);
RESP_PUSH(0x00);
RESP_PUSH(0x00);
RESP_PUSH(0x00);
RESP_PUSH(0x40);
RESP_PUSH(0x08);
}
cdrom->state = CD_STATE_RECV_CMD;
cdrom->delayed_command = CDL_NONE;
} break;
}
}
void cdrom_cmd_reads(psx_cdrom_t* cdrom) {
cdrom->delayed_command = CDL_NONE;
switch (cdrom->state) {
case CD_STATE_RECV_CMD: {
log_fatal("CdlReadS: CD_STATE_RECV_CMD");
cdrom->irq_delay = DELAY_1MS;
cdrom->state = CD_STATE_SEND_RESP1;
cdrom->delayed_command = CDL_READS;
} break;
case CD_STATE_SEND_RESP1: {
log_fatal("CdlReadS: CD_STATE_SEND_RESP1");
SET_BITS(ifr, IFR_INT, 3);
RESP_PUSH(GETSTAT_MOTOR);
fseek(cdrom->disc, cdrom->seek_offset, 0);
int double_speed = cdrom->mode & MODE_SPEED;
cdrom->irq_delay = double_speed ? READ_DOUBLE_DELAY : READ_SINGLE_DELAY;
cdrom->state = CD_STATE_SEND_RESP2;
cdrom->delayed_command = CDL_READS;
if (cdrom->spin_delay) {
cdrom->irq_delay += cdrom->spin_delay;
cdrom->spin_delay = 0;
}
} break;
case CD_STATE_SEND_RESP2: {
log_fatal("CdlReadS: CD_STATE_SEND_RESP2");
SET_BITS(ifr, IFR_INT, 1);
RESP_PUSH(GETSTAT_MOTOR | GETSTAT_READ);
log_fatal("Reading data from disc. offset=%02x:%02x:%02x (%08x, tellg=%08x)",
cdrom->seek_mm, cdrom->seek_ss, cdrom->seek_sect,
cdrom->seek_offset, ftell(cdrom->disc)
);
cdrom->dfifo_index = 0;
fread(cdrom->dfifo, 1, CD_SECTOR_SIZE, cdrom->disc);
int double_speed = cdrom->mode & MODE_SPEED;
cdrom->irq_delay = double_speed ? READ_DOUBLE_DELAY : READ_SINGLE_DELAY;
cdrom->state = CD_STATE_RECV_CMD;
cdrom->delayed_command = CDL_NONE;
} break;
}
}
void cdrom_cmd_readtoc(psx_cdrom_t* cdrom) { log_fatal("readtoc: Unimplemented"); exit(1); }
typedef void (*cdrom_cmd_t)(psx_cdrom_t*);
const char* g_psx_cdrom_command_names[] = {
"CdlUnimplemented",
"CdlGetstat",
"CdlSetloc",
"CdlUnimplemented",
"CdlUnimplemented",
"CdlUnimplemented",
"CdlReadn",
"CdlUnimplemented",
"CdlStop",
"CdlPause",
"CdlInit",
"CdlUnimplemented",
"CdlUnmute",
"CdlSetfilter",
"CdlSetmode",
"CdlUnimplemented",
"CdlGetlocl",
"CdlGetlocp",
"CdlUnimplemented",
"CdlGettn",
"CdlGettd",
"CdlSeekl",
"CdlSeekp",
"CdlUnimplemented",
"CdlUnimplemented",
"CdlTest",
"CdlGetid",
"CdlReads",
"CdlUnimplemented",
"CdlUnimplemented",
"CdlReadtoc",
"CdlUnimplemented"
};
cdrom_cmd_t g_psx_cdrom_command_table[] = {
cdrom_cmd_unimplemented,
cdrom_cmd_getstat,
cdrom_cmd_setloc,
cdrom_cmd_unimplemented,
cdrom_cmd_unimplemented,
cdrom_cmd_unimplemented,
cdrom_cmd_readn,
cdrom_cmd_unimplemented,
cdrom_cmd_stop,
cdrom_cmd_pause,
cdrom_cmd_init,
cdrom_cmd_unimplemented,
cdrom_cmd_unmute,
cdrom_cmd_setfilter,
cdrom_cmd_setmode,
cdrom_cmd_unimplemented,
cdrom_cmd_getlocl,
cdrom_cmd_getlocp,
cdrom_cmd_unimplemented,
cdrom_cmd_gettn,
cdrom_cmd_gettd,
cdrom_cmd_seekl,
cdrom_cmd_seekp,
cdrom_cmd_unimplemented,
cdrom_cmd_unimplemented,
cdrom_cmd_test,
cdrom_cmd_getid,
cdrom_cmd_reads,
cdrom_cmd_unimplemented,
cdrom_cmd_unimplemented,
cdrom_cmd_readtoc,
// Actually an unimplemented command, we use this
// index for CD error handling
cdrom_cmd_error
};
typedef uint8_t (*psx_cdrom_read_function_t)(psx_cdrom_t*);
typedef void (*psx_cdrom_write_function_t)(psx_cdrom_t*, uint8_t);
uint8_t cdrom_read_status(psx_cdrom_t* cdrom) {
return cdrom->status;
}
uint8_t cdrom_read_rfifo(psx_cdrom_t* cdrom) {
uint8_t data = cdrom->rfifo[--cdrom->rfifo_index];
if (cdrom->rfifo_index == 0)
SET_BITS(status, STAT_RSLRRDY_MASK, 0);
return data;
}
uint8_t cdrom_read_dfifo(psx_cdrom_t* cdrom) {
if (!cdrom->dfifo_full)
return 0;
int sector_size_bit = cdrom->mode & MODE_SECTOR_SIZE;
uint32_t read_sector_size = sector_size_bit ? 0x924 : 0x800;
uint32_t offset = sector_size_bit ? 12 : 24;
if (cdrom->dfifo_index != read_sector_size) {
SET_BITS(status, STAT_DRQSTS_MASK, STAT_DRQSTS_MASK);
return cdrom->dfifo[offset + (cdrom->dfifo_index++)];
} else {
SET_BITS(status, STAT_DRQSTS_MASK, 0);
cdrom->dfifo_full = 0;
}
return 0x00;
}
uint8_t cdrom_read_ier(psx_cdrom_t* cdrom) {
return cdrom->ier;
}
uint8_t cdrom_read_ifr(psx_cdrom_t* cdrom) {
return 0xe0 | cdrom->ifr;
}
void cdrom_write_status(psx_cdrom_t* cdrom, uint8_t value) {
SET_BITS(status, STAT_INDEX_MASK, value);
}
void cdrom_write_cmd(psx_cdrom_t* cdrom, uint8_t value) {
log_fatal("%s(%02x) %u params=[%02x, %02x, %02x, %02x, %02x, %02x]",
g_psx_cdrom_command_names[value],
value,
cdrom->pfifo_index,
cdrom->pfifo[0],
cdrom->pfifo[1],
cdrom->pfifo[2],
cdrom->pfifo[3],
cdrom->pfifo[4],
cdrom->pfifo[5]
);
cdrom->command = value;
cdrom->state = CD_STATE_RECV_CMD;
g_psx_cdrom_command_table[value](cdrom);
}
void cdrom_write_pfifo(psx_cdrom_t* cdrom, uint8_t value) {
cdrom->pfifo[(cdrom->pfifo_index++) & 0xf] = value;
SET_BITS(status, STAT_PRMWRDY_MASK, (cdrom->pfifo_index & 0x10) ? 0x0 : 0xff);
cdrom->pfifo_index &= 0x1f;
}
void cdrom_write_req(psx_cdrom_t* cdrom, uint8_t value) {
if (value & REQ_BFRD) {
SET_BITS(status, STAT_DRQSTS_MASK, STAT_DRQSTS_MASK);
cdrom->dfifo_full = 1;
} else {
SET_BITS(status, STAT_DRQSTS_MASK, 0);
cdrom->dfifo_full = 0;
cdrom->dfifo_index = 0;
}
}
void cdrom_write_smdout(psx_cdrom_t* cdrom, uint8_t value) {
log_fatal("Sound map data out unimplemented");
}
void cdrom_write_ier(psx_cdrom_t* cdrom, uint8_t value) {
cdrom->ier = value;
}
void cdrom_write_ifr(psx_cdrom_t* cdrom, uint8_t value) {
cdrom->ifr &= ~(value & 0x7);
// Clear Parameter FIFO
if (value & 0x40) {
cdrom->pfifo_index = 0;
SET_BITS(
status,
(STAT_PRMEMPT_MASK | STAT_PRMWRDY_MASK),
(STAT_PRMEMPT_MASK | STAT_PRMWRDY_MASK)
);
}
}
void cdrom_write_sminfo(psx_cdrom_t* cdrom, uint8_t value) {
log_fatal("Sound map coding info unimplemented");
}
void cdrom_write_lcdlspuv(psx_cdrom_t* cdrom, uint8_t value) {
log_fatal("Volume registers unimplemented");
}
void cdrom_write_rcdrspuv(psx_cdrom_t* cdrom, uint8_t value) {
log_fatal("Volume registers unimplemented");
}
void cdrom_write_rcdlspuv(psx_cdrom_t* cdrom, uint8_t value) {
log_fatal("Volume registers unimplemented");
}
void cdrom_write_lcdrspuv(psx_cdrom_t* cdrom, uint8_t value) {
log_fatal("Volume registers unimplemented");
}
void cdrom_write_volume(psx_cdrom_t* cdrom, uint8_t value) {
log_fatal("Volume registers unimplemented");
}
psx_cdrom_read_function_t g_psx_cdrom_read_table[] = {
cdrom_read_status, cdrom_read_rfifo, cdrom_read_dfifo, cdrom_read_ier,
cdrom_read_status, cdrom_read_rfifo, cdrom_read_dfifo, cdrom_read_ifr,
cdrom_read_status, cdrom_read_rfifo, cdrom_read_dfifo, cdrom_read_ier,
cdrom_read_status, cdrom_read_rfifo, cdrom_read_dfifo, cdrom_read_ifr
};
psx_cdrom_write_function_t g_psx_cdrom_write_table[] = {
cdrom_write_status, cdrom_write_cmd , cdrom_write_pfifo , cdrom_write_req ,
cdrom_write_status, cdrom_write_smdout , cdrom_write_ier , cdrom_write_ifr ,
cdrom_write_status, cdrom_write_sminfo , cdrom_write_lcdlspuv, cdrom_write_lcdrspuv,
cdrom_write_status, cdrom_write_rcdrspuv, cdrom_write_rcdlspuv, cdrom_write_volume
};
const char* g_psx_cdrom_read_names_table[] = {
"cdrom_read_status", "cdrom_read_rfifo", "cdrom_read_dfifo", "cdrom_read_ier",
"cdrom_read_status", "cdrom_read_rfifo", "cdrom_read_dfifo", "cdrom_read_ifr",
"cdrom_read_status", "cdrom_read_rfifo", "cdrom_read_dfifo", "cdrom_read_ier",
"cdrom_read_status", "cdrom_read_rfifo", "cdrom_read_dfifo", "cdrom_read_ifr"
};
const char* g_psx_cdrom_write_names_table[] = {
"cdrom_write_status", "cdrom_write_cmd" , "cdrom_write_pfifo" , "cdrom_write_req" ,
"cdrom_write_status", "cdrom_write_smdout" , "cdrom_write_ier" , "cdrom_write_ifr" ,
"cdrom_write_status", "cdrom_write_sminfo" , "cdrom_write_lcdlspuv", "cdrom_write_lcdrspuv",
"cdrom_write_status", "cdrom_write_rcdrspuv", "cdrom_write_rcdlspuv", "cdrom_write_volume"
};
psx_cdrom_t* psx_cdrom_create() {
return (psx_cdrom_t*)malloc(sizeof(psx_cdrom_t));
}
void psx_cdrom_init(psx_cdrom_t* cdrom, psx_ic_t* ic) {
memset(cdrom, 0, sizeof(psx_cdrom_t));
cdrom->io_base = PSX_CDROM_BEGIN;
cdrom->io_size = PSX_CDROM_SIZE;
cdrom->ic = ic;
cdrom->status = STAT_PRMEMPT_MASK | STAT_PRMWRDY_MASK;
}
uint32_t psx_cdrom_read32(psx_cdrom_t* cdrom, uint32_t offset) {
log_fatal("Unhandled 32-bit CDROM read at offset %08x", offset);
return 0x0;
}
uint16_t psx_cdrom_read16(psx_cdrom_t* cdrom, uint32_t offset) {
log_fatal("Unhandled 16-bit CDROM read at offset %08x", offset);
return 0x0;
}
uint8_t psx_cdrom_read8(psx_cdrom_t* cdrom, uint32_t offset) {
uint8_t data = g_psx_cdrom_read_table[(STAT_INDEX << 2) | offset](cdrom);
// log_fatal("%s (read %02x)", g_psx_cdrom_read_names_table[(STAT_INDEX << 2) | offset], data);
return data;
}
void psx_cdrom_write32(psx_cdrom_t* cdrom, uint32_t offset, uint32_t value) {
log_fatal("Unhandled 32-bit CDROM write at offset %08x (%08x)", offset, value);
}
void psx_cdrom_write16(psx_cdrom_t* cdrom, uint32_t offset, uint16_t value) {
log_fatal("Unhandled 16-bit CDROM write at offset %08x (%04x)", offset, value);
}
void psx_cdrom_write8(psx_cdrom_t* cdrom, uint32_t offset, uint8_t value) {
// log_fatal("%s (write %02x)", g_psx_cdrom_write_names_table[(STAT_INDEX << 2) | offset], value);
g_psx_cdrom_write_table[(STAT_INDEX << 2) | offset](cdrom, value);
}
void psx_cdrom_update(psx_cdrom_t* cdrom) {
if (cdrom->irq_delay) {
cdrom->irq_delay -= 2;
if (cdrom->irq_delay <= 0) {
if (cdrom->int_number) {
SET_BITS(ifr, IFR_INT, cdrom->int_number);
cdrom->int_number = 0;
}
log_fatal("CDROM INT%u", cdrom->ifr & 0x7);
psx_ic_irq(cdrom->ic, IC_CDROM);
cdrom->irq_delay = 0;
if (cdrom->delayed_command) {
g_psx_cdrom_command_table[cdrom->delayed_command](cdrom);
}
}
}
}
void psx_cdrom_open(psx_cdrom_t* cdrom, const char* path) {
cdrom->disc = fopen(path, "rb");
if (!cdrom->disc) {
log_fatal("Couldn't open disc image \"%s\"", path);
exit(1);
}
fseek(cdrom->disc, 0, 0);
}
void psx_cdrom_close(psx_cdrom_t* cdrom) {
if (cdrom->disc)
fclose(cdrom->disc);
}
void psx_cdrom_destroy(psx_cdrom_t* cdrom) {
free(cdrom);
}