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cd: switch to CD controller code from genplus

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same license, much cleaner code
using own dma code though..
This commit is contained in:
notaz 2013-10-05 04:14:45 +03:00
parent a6523294e2
commit 3f23709ef3
14 changed files with 1212 additions and 807 deletions
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188
pico/cd/cd_sys.c
View file

@ -23,6 +23,10 @@
#define FAST_REV 0x10300 // FAST REVERSE track CDD status
#define PLAYING 0x0100 // PLAYING audio track CDD status
//#undef cdprintf
//#define cdprintf(x, ...) elprintf(EL_STATUS, x, ##__VA_ARGS__)
#define CDC_Update_Header()
static int CD_Present = 0;
@ -139,15 +143,32 @@ PICO_INTERNAL void Check_CD_Command(void)
cdprintf("Got a read command");
// DATA ?
if (Pico_mcd->scd.Cur_Track == 1)
if (Pico_mcd->scd.Cur_Track == 1) {
Pico_mcd->s68k_regs[0x36] |= 0x01;
else Pico_mcd->s68k_regs[0x36] &= ~0x01; // AUDIO
if (Pico_mcd->scd.File_Add_Delay == 0)
{
FILE_Read_One_LBA_CDC();
if (Pico_mcd->scd.File_Add_Delay == 0)
{
unsigned char header[4];
_msf MSF;
LBA_to_MSF(Pico_mcd->scd.Cur_LBA, &MSF);
header[0] = INT_TO_BCDB(MSF.M);
header[1] = INT_TO_BCDB(MSF.S);
header[2] = INT_TO_BCDB(MSF.F);
header[3] = 0x01;
//FILE_Read_One_LBA_CDC();
Pico_mcd->scd.Cur_LBA +=
cdc_decoder_update(header);
}
else Pico_mcd->scd.File_Add_Delay--;
}
else {
Pico_mcd->s68k_regs[0x36] &= ~0x01; // AUDIO
unsigned char header[4] = { 0, };
cdc_decoder_update(header);
}
else Pico_mcd->scd.File_Add_Delay--;
}
// Check CDD
@ -755,3 +776,158 @@ PICO_INTERNAL int CDD_Def(void)
}
static int bswapwrite(int a, unsigned short d)
{
*(unsigned short *)(Pico_mcd->s68k_regs + a) = (d>>8)|(d<<8);
return d + (d >> 8);
}
PICO_INTERNAL void CDD_Export_Status(void)
{
unsigned int csum;
csum = bswapwrite( 0x38+0, Pico_mcd->cdd.Status);
csum += bswapwrite( 0x38+2, Pico_mcd->cdd.Minute);
csum += bswapwrite( 0x38+4, Pico_mcd->cdd.Seconde);
csum += bswapwrite( 0x38+6, Pico_mcd->cdd.Frame);
Pico_mcd->s68k_regs[0x38+8] = Pico_mcd->cdd.Ext;
csum += Pico_mcd->cdd.Ext;
Pico_mcd->s68k_regs[0x38+9] = ~csum & 0xf;
Pico_mcd->s68k_regs[0x37] &= 3; // CDD.Control
if (Pico_mcd->s68k_regs[0x33] & PCDS_IEN4)
{
elprintf(EL_INTS, "cdd export irq 4");
SekInterruptS68k(4);
}
// cdprintf("CDD exported status\n");
cdprintf("out: Status=%.4X, Minute=%.4X, Second=%.4X, Frame=%.4X Checksum=%.4X",
(Pico_mcd->s68k_regs[0x38+0] << 8) | Pico_mcd->s68k_regs[0x38+1],
(Pico_mcd->s68k_regs[0x38+2] << 8) | Pico_mcd->s68k_regs[0x38+3],
(Pico_mcd->s68k_regs[0x38+4] << 8) | Pico_mcd->s68k_regs[0x38+5],
(Pico_mcd->s68k_regs[0x38+6] << 8) | Pico_mcd->s68k_regs[0x38+7],
(Pico_mcd->s68k_regs[0x38+8] << 8) | Pico_mcd->s68k_regs[0x38+9]);
}
PICO_INTERNAL void CDD_Import_Command(void)
{
// cdprintf("CDD importing command\n");
cdprintf("in: Command=%.4X, Minute=%.4X, Second=%.4X, Frame=%.4X Checksum=%.4X",
(Pico_mcd->s68k_regs[0x38+10+0] << 8) | Pico_mcd->s68k_regs[0x38+10+1],
(Pico_mcd->s68k_regs[0x38+10+2] << 8) | Pico_mcd->s68k_regs[0x38+10+3],
(Pico_mcd->s68k_regs[0x38+10+4] << 8) | Pico_mcd->s68k_regs[0x38+10+5],
(Pico_mcd->s68k_regs[0x38+10+6] << 8) | Pico_mcd->s68k_regs[0x38+10+7],
(Pico_mcd->s68k_regs[0x38+10+8] << 8) | Pico_mcd->s68k_regs[0x38+10+9]);
switch (Pico_mcd->s68k_regs[0x38+10+0])
{
case 0x0: // STATUS (?)
Get_Status_CDD_c0();
break;
case 0x1: // STOP ALL (?)
Stop_CDD_c1();
break;
case 0x2: // GET TOC INFORMATIONS
switch(Pico_mcd->s68k_regs[0x38+10+3])
{
case 0x0: // get current position (MSF format)
Pico_mcd->cdd.Status = (Pico_mcd->cdd.Status & 0xFF00);
Get_Pos_CDD_c20();
break;
case 0x1: // get elapsed time of current track played/scanned (relative MSF format)
Pico_mcd->cdd.Status = (Pico_mcd->cdd.Status & 0xFF00) | 1;
Get_Track_Pos_CDD_c21();
break;
case 0x2: // get current track in RS2-RS3
Pico_mcd->cdd.Status = (Pico_mcd->cdd.Status & 0xFF00) | 2;
Get_Current_Track_CDD_c22();
break;
case 0x3: // get total length (MSF format)
Pico_mcd->cdd.Status = (Pico_mcd->cdd.Status & 0xFF00) | 3;
Get_Total_Lenght_CDD_c23();
break;
case 0x4: // first & last track number
Pico_mcd->cdd.Status = (Pico_mcd->cdd.Status & 0xFF00) | 4;
Get_First_Last_Track_CDD_c24();
break;
case 0x5: // get track addresse (MSF format)
Pico_mcd->cdd.Status = (Pico_mcd->cdd.Status & 0xFF00) | 5;
Get_Track_Adr_CDD_c25();
break;
default : // invalid, then we return status
Pico_mcd->cdd.Status = (Pico_mcd->cdd.Status & 0xFF00) | 0xF;
Get_Status_CDD_c0();
break;
}
break;
case 0x3: // READ
Play_CDD_c3();
break;
case 0x4: // SEEK
Seek_CDD_c4();
break;
case 0x6: // PAUSE/STOP
Pause_CDD_c6();
break;
case 0x7: // RESUME
Resume_CDD_c7();
break;
case 0x8: // FAST FOWARD
Fast_Foward_CDD_c8();
break;
case 0x9: // FAST REWIND
Fast_Rewind_CDD_c9();
break;
case 0xA: // RECOVER INITIAL STATE (?)
CDD_cA();
break;
case 0xC: // CLOSE TRAY
Close_Tray_CDD_cC();
break;
case 0xD: // OPEN TRAY
Open_Tray_CDD_cD();
break;
default: // UNKNOWN
CDD_Def();
break;
}
}
void CDD_Reset(void)
{
// Reseting CDD
memset(Pico_mcd->s68k_regs+0x34, 0, 2*2); // CDD.Fader, CDD.Control
Pico_mcd->cdd.Status = 0;
Pico_mcd->cdd.Minute = 0;
Pico_mcd->cdd.Seconde = 0;
Pico_mcd->cdd.Frame = 0;
Pico_mcd->cdd.Ext = 0;
// clear receive status and transfer command
memset(Pico_mcd->s68k_regs+0x38, 0, 20);
Pico_mcd->s68k_regs[0x38+9] = 0xF; // Default checksum
}