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akiko.cpp
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/*
* UAE - The Un*x Amiga Emulator
*
* CD32 Akiko emulation
*
* - C2P
* - NVRAM
* - CDROM
*
* Copyright 2001-2010 Toni Wilen
*
*/
#include "sysconfig.h"
#include "sysdeps.h"
#include "options.h"
#include "memory.h"
#include "events.h"
#include "savestate.h"
#include "blkdev.h"
#include "zfile.h"
#include "threaddep/thread.h"
#include "akiko.h"
#include "gui.h"
#include "crc32.h"
#include "uae.h"
#include "custom.h"
#include "newcpu.h"
#include "flashrom.h"
#define AKIKO_DEBUG_NVRAM 0
#define AKIKO_DEBUG_IO 0
#define AKIKO_DEBUG_IO_CMD 0
// 43 48 49 4E 4F 4E 20 20 4F 2D 36 35 38 2D 32 20 32 34
#define FIRMWAREVERSION "CHINON O-658-2 24"
static void irq (void)
{
#if AKIKO_DEBUG_IO > 1
write_log (_T("Akiko Interrupt\n"));
#endif
if (!(intreq & 8)) {
INTREQ_0 (0x8000 | 0x0008);
}
}
/*
* CD32 1Kb NVRAM (EEPROM) emulation
*
* NVRAM chip is 24C08 CMOS EEPROM (1024x8 bits = 1Kb)
* Chip interface is I2C (2 wire serial)
* Akiko addresses used:
* 0xb80030: bit 7 = SCL (clock), 6 = SDA (data)
* 0xb80032: 0xb80030 data direction register (0 = input, 1 = output)
*
*/
static uae_u8 *cd32_nvram;
static void *cd32_eeprom;
static uae_u8 cd32_i2c_direction;
static bool cd32_i2c_data_scl, cd32_i2c_data_sda;
static struct zfile *flashfile;
static void nvram_read (void)
{
zfile_fclose(flashfile);
flashfile = NULL;
eeprom_free(cd32_eeprom);
cd32_eeprom = NULL;
cd32_i2c_data_scl = cd32_i2c_data_sda = true;
cd32_i2c_direction = 0;
if (!currprefs.cs_cd32nvram)
return;
if (!cd32_nvram)
cd32_nvram = xmalloc(uae_u8, currprefs.cs_cd32nvram_size);
memset(cd32_nvram, 0, currprefs.cs_cd32nvram_size);
flashfile = zfile_fopen (currprefs.flashfile, _T("rb+"), ZFD_NORMAL);
if (!flashfile)
flashfile = zfile_fopen (currprefs.flashfile, _T("wb"), 0);
if (flashfile) {
int size = zfile_fread(cd32_nvram, 1, currprefs.cs_cd32nvram_size, flashfile);
if (size < currprefs.cs_cd32nvram_size)
zfile_fwrite(cd32_nvram + size, 1, currprefs.cs_cd32nvram_size - size, flashfile);
}
cd32_eeprom = eeprom_new(cd32_nvram, currprefs.cs_cd32nvram_size, flashfile);
}
static void akiko_nvram_write (int offset, uae_u32 v)
{
switch (offset)
{
case 0:
if (cd32_i2c_direction & 0x80)
cd32_i2c_data_scl = (v & 0x80) != 0;
else
cd32_i2c_data_scl = true;
eeprom_i2c_set(cd32_eeprom, BITBANG_I2C_SCL, cd32_i2c_data_scl);
if (cd32_i2c_direction & 0x40)
cd32_i2c_data_sda = (v & 0x40) != 0;
else
cd32_i2c_data_sda = true;
eeprom_i2c_set(cd32_eeprom, BITBANG_I2C_SDA, cd32_i2c_data_sda);
break;
case 2:
cd32_i2c_direction = v;
break;
}
}
static uae_u32 akiko_nvram_read (int offset)
{
uae_u32 v = 0;
switch (offset)
{
case 0:
v |= eeprom_i2c_set(cd32_eeprom, BITBANG_I2C_SCL, cd32_i2c_data_scl) ? 0x80 : 0x00;
v |= eeprom_i2c_set(cd32_eeprom, BITBANG_I2C_SDA, cd32_i2c_data_sda) ? 0x40 : 0x00;
break;
case 2:
v = cd32_i2c_direction;
break;
}
return v;
}
/* CD32 Chunky to Planar hardware emulation
* Akiko addresses used:
* 0xb80038-0xb8003b
*/
static uae_u32 akiko_buffer[8];
static int akiko_read_offset, akiko_write_offset;
static uae_u32 akiko_result[8];
#if 0
static void akiko_c2p_do (void)
{
int i;
for (i = 0; i < 8; i++)
akiko_result[i] = 0;
/* FIXME: better c2p algoritm than this piece of crap.... */
for (i = 0; i < 8 * 32; i++) {
if (akiko_buffer[7 - (i >> 5)] & (1 << (i & 31)))
akiko_result[i & 7] |= 1 << (i >> 3);
}
}
#else
/* Optimised Chunky-to-Planar algorithm by Mequa */
static uae_u32 akiko_precalc_shift[32];
static uae_u32 akiko_precalc_bytenum[32][8];
static void akiko_precalculate (void)
{
uae_u32 i, j;
for (i = 0; i < 32; i++) {
akiko_precalc_shift [(int)i] = 1 << i;
for (j = 0; j < 8; j++) {
akiko_precalc_bytenum[(int)i][(int)j] = (i >> 3) + ((7 - j) << 2);
}
}
}
static void akiko_c2p_do (void)
{
int i;
for (i = 0; i < 8; i++) {
akiko_result[i] = (((akiko_buffer[0] & akiko_precalc_shift[i]) != 0) << (akiko_precalc_bytenum[i][0]) )
| (((akiko_buffer[1] & akiko_precalc_shift[i]) != 0) << (akiko_precalc_bytenum[i][1]) )
| (((akiko_buffer[2] & akiko_precalc_shift[i]) != 0) << (akiko_precalc_bytenum[i][2]) )
| (((akiko_buffer[3] & akiko_precalc_shift[i]) != 0) << (akiko_precalc_bytenum[i][3]) )
| (((akiko_buffer[4] & akiko_precalc_shift[i]) != 0) << (akiko_precalc_bytenum[i][4]) )
| (((akiko_buffer[5] & akiko_precalc_shift[i]) != 0) << (akiko_precalc_bytenum[i][5]) )
| (((akiko_buffer[6] & akiko_precalc_shift[i]) != 0) << (akiko_precalc_bytenum[i][6]) )
| (((akiko_buffer[7] & akiko_precalc_shift[i]) != 0) << (akiko_precalc_bytenum[i][7]) )
| (((akiko_buffer[0] & akiko_precalc_shift[i+8]) != 0) << (akiko_precalc_bytenum[i+8][0]) )
| (((akiko_buffer[1] & akiko_precalc_shift[i+8]) != 0) << (akiko_precalc_bytenum[i+8][1]) )
| (((akiko_buffer[2] & akiko_precalc_shift[i+8]) != 0) << (akiko_precalc_bytenum[i+8][2]) )
| (((akiko_buffer[3] & akiko_precalc_shift[i+8]) != 0) << (akiko_precalc_bytenum[i+8][3]) )
| (((akiko_buffer[4] & akiko_precalc_shift[i+8]) != 0) << (akiko_precalc_bytenum[i+8][4]) )
| (((akiko_buffer[5] & akiko_precalc_shift[i+8]) != 0) << (akiko_precalc_bytenum[i+8][5]) )
| (((akiko_buffer[6] & akiko_precalc_shift[i+8]) != 0) << (akiko_precalc_bytenum[i+8][6]) )
| (((akiko_buffer[7] & akiko_precalc_shift[i+8]) != 0) << (akiko_precalc_bytenum[i+8][7]) )
| (((akiko_buffer[0] & akiko_precalc_shift[i+16]) != 0) << (akiko_precalc_bytenum[i+16][0]))
| (((akiko_buffer[1] & akiko_precalc_shift[i+16]) != 0) << (akiko_precalc_bytenum[i+16][1]))
| (((akiko_buffer[2] & akiko_precalc_shift[i+16]) != 0) << (akiko_precalc_bytenum[i+16][2]))
| (((akiko_buffer[3] & akiko_precalc_shift[i+16]) != 0) << (akiko_precalc_bytenum[i+16][3]))
| (((akiko_buffer[4] & akiko_precalc_shift[i+16]) != 0) << (akiko_precalc_bytenum[i+16][4]))
| (((akiko_buffer[5] & akiko_precalc_shift[i+16]) != 0) << (akiko_precalc_bytenum[i+16][5]))
| (((akiko_buffer[6] & akiko_precalc_shift[i+16]) != 0) << (akiko_precalc_bytenum[i+16][6]))
| (((akiko_buffer[7] & akiko_precalc_shift[i+16]) != 0) << (akiko_precalc_bytenum[i+16][7]))
| (((akiko_buffer[0] & akiko_precalc_shift[i+24]) != 0) << (akiko_precalc_bytenum[i+24][0]))
| (((akiko_buffer[1] & akiko_precalc_shift[i+24]) != 0) << (akiko_precalc_bytenum[i+24][1]))
| (((akiko_buffer[2] & akiko_precalc_shift[i+24]) != 0) << (akiko_precalc_bytenum[i+24][2]))
| (((akiko_buffer[3] & akiko_precalc_shift[i+24]) != 0) << (akiko_precalc_bytenum[i+24][3]))
| (((akiko_buffer[4] & akiko_precalc_shift[i+24]) != 0) << (akiko_precalc_bytenum[i+24][4]))
| (((akiko_buffer[5] & akiko_precalc_shift[i+24]) != 0) << (akiko_precalc_bytenum[i+24][5]))
| (((akiko_buffer[6] & akiko_precalc_shift[i+24]) != 0) << (akiko_precalc_bytenum[i+24][6]))
| (((akiko_buffer[7] & akiko_precalc_shift[i+24]) != 0) << (akiko_precalc_bytenum[i+24][7]));
}
}
#endif
static void akiko_c2p_write (int offset, uae_u32 v)
{
if (offset == 3)
akiko_buffer[akiko_write_offset] = 0;
akiko_buffer[akiko_write_offset] |= v << ( 8 * (3 - offset));
if (offset == 0) {
akiko_write_offset++;
akiko_write_offset &= 7;
}
akiko_read_offset = 0;
}
static uae_u32 akiko_c2p_read (int offset)
{
uae_u32 v;
if (akiko_read_offset == 0 && offset == 3)
akiko_c2p_do ();
akiko_write_offset = 0;
v = akiko_result[akiko_read_offset];
if (offset == 0) {
akiko_read_offset++;
akiko_read_offset &= 7;
}
return v >> (8 * (3 - offset));
}
/* CD32 CDROM hardware emulation
* Akiko addresses used:
* 0xb80004-0xb80028
*/
#define CDINTERRUPT_SUBCODE 0x80000000
#define CDINTERRUPT_DRIVEXMIT 0x40000000 /* not used by ROM */
#define CDINTERRUPT_DRIVERECV 0x20000000 /* not used by ROM */
#define CDINTERRUPT_RXDMADONE 0x10000000
#define CDINTERRUPT_TXDMADONE 0x08000000
#define CDINTERRUPT_PBX 0x04000000
#define CDINTERRUPT_OVERFLOW 0x02000000
#define CDFLAG_SUBCODE 0x80000000
#define CDFLAG_TXD 0x40000000
#define CDFLAG_RXD 0x20000000
#define CDFLAG_CAS 0x10000000
#define CDFLAG_PBX 0x08000000
#define CDFLAG_ENABLE 0x04000000
#define CDFLAG_RAW 0x02000000
#define CDFLAG_MSB 0x01000000
#define CDS_ERROR 0x80
#define CDS_PLAYING 0x08
#define CDS_PLAYEND 0x00
#define CH_ERR_BADCOMMAND 0x80 // %10000000
#define CH_ERR_CHECKSUM 0x88 // %10001000
#define CH_ERR_DRAWERSTUCK 0x90 // %10010000
#define CH_ERR_DISKUNREADABLE 0x98 // %10011000
#define CH_ERR_INVALIDADDRESS 0xa0 // %10100000
#define CH_ERR_WRONGDATA 0xa8 // %10101000
#define CH_ERR_FOCUSERROR 0xc8 // %11001000
#define CH_ERR_SPINDLEERROR 0xd0 // %11010000
#define CH_ERR_TRACKINGERROR 0xd8 // %11011000
#define CH_ERR_SLEDERROR 0xe0 // %11100000
#define CH_ERR_TRACKJUMP 0xe8 // %11101000
#define CH_ERR_ABNORMALSEEK 0xf0 // %11110000
#define CH_ERR_NODISK 0xf8 // %11111000
static int subcodecounter;
#define MAX_SUBCODEBUFFER 36
static volatile int subcodebufferoffset, subcodebufferoffsetw;
static uae_u8 subcodebufferinuse[MAX_SUBCODEBUFFER];
static uae_u8 subcodebuffer[MAX_SUBCODEBUFFER * SUB_CHANNEL_SIZE];
static uae_u32 cdrom_intreq, cdrom_intena;
static uae_u8 cdrom_subcodeoffset;
static uae_u32 cdrom_addressdata, cdrom_addressmisc;
static uae_u32 subcode_address, cdrx_address, cdtx_address;
static uae_u32 cdrom_flags;
static uae_u32 cdrom_pbx;
static uae_u8 cdcomtxinx; /* 0x19 */
static uae_u8 cdcomrxinx; /* 0x1a */
static uae_u8 cdcomtxcmp; /* 0x1d */
static uae_u8 cdcomrxcmp; /* 0x1f */
static uae_u8 cdrom_result_buffer[32];
static uae_u8 cdrom_command_buffer[32];
static uae_u8 cdrom_command;
static int cdrom_toc_counter;
static uae_u32 cdrom_toc_crc;
static uae_u8 cdrom_toc_buffer[MAX_TOC_ENTRIES * 13];
static struct cd_toc_head cdrom_toc_cd_buffer;
static uae_u8 qcode_buf[SUBQ_SIZE];
static int qcode_valid;
static int cdrom_disk, cdrom_paused, cdrom_playing, cdrom_audiostatus;
static int cdrom_command_active;
static int cdrom_command_length;
static int cdrom_checksum_error, cdrom_unknown_command;
static int cdrom_data_offset, cdrom_speed, cdrom_sector_counter;
static int cdrom_current_sector, cdrom_seek_delay;
static int cdrom_audiotimeout;
static int cdrom_led;
static int cdrom_receive_length, cdrom_receive_offset;
static int cdrom_muted;
static int cd_initialized;
static int cdrom_tx_dma_delay;
static uae_u8 *sector_buffer_1, *sector_buffer_2;
static int sector_buffer_sector_1, sector_buffer_sector_2;
#define SECTOR_BUFFER_SIZE 64
static uae_u8 *sector_buffer_info_1, *sector_buffer_info_2;
static int unitnum = -1;
static bool akiko_inited;
static volatile int mediachanged, mediacheckcounter;
static volatile int frame2counter;
static smp_comm_pipe requests;
static volatile int akiko_thread_running;
static uae_sem_t akiko_sem, sub_sem;
static void checkint (void)
{
if (cdrom_intreq & cdrom_intena)
irq ();
}
static void set_status (uae_u32 status)
{
#if AKIKO_DEBUG_IO
if (!(cdrom_intreq & status))
write_log (_T("Akiko INTREQ %08x (%08x)\n"), status, cdrom_intreq | status);
#endif
cdrom_intreq |= status;
checkint ();
cdrom_led ^= LED_CD_ACTIVE2;
}
void rethink_akiko (void)
{
checkint ();
}
static void cdaudiostop_do (void)
{
qcode_valid = 0;
if (unitnum < 0)
return;
sys_command_cd_pause (unitnum, 0);
sys_command_cd_stop (unitnum);
}
static void cdaudiostop (void)
{
cdrom_audiostatus = 0;
cdrom_audiotimeout = 0;
cdrom_paused = 0;
cdrom_playing = 0;
write_comm_pipe_u32 (&requests, 0x0104, 1);
}
static void subfunc (uae_u8 *data, int cnt)
{
if (!(cdrom_flags & CDFLAG_SUBCODE))
return;
uae_sem_wait (&sub_sem);
#if 0
int total = 0;
for (int i = 0; i < MAX_SUBCODEBUFFER; i++) {
if (subcodebufferinuse[i])
total++;
}
write_log (_T("%d "), total);
#endif
if (subcodebufferinuse[subcodebufferoffsetw]) {
memset (subcodebufferinuse, 0,sizeof (subcodebufferinuse));
subcodebufferoffsetw = subcodebufferoffset = 0;
uae_sem_post (&sub_sem);
//write_log (_T("CD32: subcode buffer overflow 1\n"));
return;
}
int offset = subcodebufferoffsetw;
while (cnt > 0) {
if (subcodebufferinuse[offset]) {
write_log (_T("CD32: subcode buffer overflow 2\n"));
break;
}
subcodebufferinuse[offset] = 1;
memcpy (&subcodebuffer[offset * SUB_CHANNEL_SIZE], data, SUB_CHANNEL_SIZE);
data += SUB_CHANNEL_SIZE;
offset++;
if (offset >= MAX_SUBCODEBUFFER)
offset = 0;
cnt--;
}
subcodebufferoffsetw = offset;
uae_sem_post (&sub_sem);
}
static int statusfunc (int status)
{
if (status == -1)
return 0;
if (status == -2)
return 10;
#if 1
if (cdrom_audiostatus != status) {
if (status == AUDIO_STATUS_IN_PROGRESS) {
cdrom_playing = 1;
cdrom_audiotimeout = 1;
}
if (cdrom_playing && status != AUDIO_STATUS_IN_PROGRESS && status != AUDIO_STATUS_PAUSED && status != AUDIO_STATUS_NOT_SUPPORTED) {
cdrom_audiotimeout = -1;
}
}
cdrom_audiostatus = status;
#endif
return 0;
}
static void cdaudioplay_do (void)
{
uae_u32 startlsn = read_comm_pipe_u32_blocking (&requests);
uae_u32 endlsn = read_comm_pipe_u32_blocking (&requests);
uae_u32 scan = read_comm_pipe_u32_blocking (&requests);
qcode_valid = 0;
if (unitnum < 0)
return;
sys_command_cd_pause (unitnum, 0);
sys_command_cd_play (unitnum, startlsn, endlsn, scan, statusfunc, subfunc);
}
static bool isaudiotrack (int startlsn)
{
struct cd_toc *s = NULL;
uae_u32 addr;
int i;
if (!cdrom_toc_cd_buffer.points)
return false;
for (i = 0; i < cdrom_toc_cd_buffer.points; i++) {
s = &cdrom_toc_cd_buffer.toc[i];
addr = s->paddress;
if (s->track > 0 && s->track < 100 && addr >= startlsn)
break;
s++;
}
if (s && (s->control & 0x0c) == 0x04) {
write_log (_T("tried to play data track %d!\n"), s->track);
return false;
}
return true;
}
static struct cd_toc *get_track (int startlsn)
{
for (int i = cdrom_toc_cd_buffer.first_track_offset + 1; i <= cdrom_toc_cd_buffer.last_track_offset; i++) {
struct cd_toc *s = &cdrom_toc_cd_buffer.toc[i];
uae_u32 addr = s->paddress;
if (startlsn < addr)
return s - 1;
}
return NULL;
}
static int last_play_end;
static int cd_play_audio (int startlsn, int endlsn, int scan)
{
struct cd_toc *s = NULL;
if (!cdrom_toc_cd_buffer.points)
return 0;
s = get_track (startlsn);
if (s && (s->control & 0x0c) == 0x04) {
s = get_track (startlsn + 150);
if (s && (s->control & 0x0c) == 0x04) {
write_log (_T("tried to play data track %d!\n"), s->track);
s++;
startlsn = s->paddress;
s++;
endlsn = s->paddress;
}
startlsn = s->paddress;
}
qcode_valid = 0;
last_play_end = endlsn;
cdrom_audiotimeout = 10;
cdrom_paused = 0;
write_comm_pipe_u32 (&requests, 0x0110, 0);
write_comm_pipe_u32 (&requests, startlsn, 0);
write_comm_pipe_u32 (&requests, endlsn, 0);
write_comm_pipe_u32 (&requests, scan, 1);
return 1;
}
/* read qcode */
static int last_play_pos;
static int cd_qcode (uae_u8 *d)
{
uae_u8 *buf, *s, as;
if (d)
memset (d, 0, 11);
last_play_pos = 0;
buf = qcode_buf;
as = buf[1];
buf[2] = 0x80;
if (!qcode_valid)
return 0;
if (cdrom_audiostatus != AUDIO_STATUS_IN_PROGRESS && cdrom_audiostatus != AUDIO_STATUS_PAUSED)
return 0;
s = buf + 4;
last_play_pos = msf2lsn (fromlongbcd (s + 7));
if (!d)
return 0;
buf[2] = 0;
/* ??? */
d[0] = 0;
/* CtlAdr */
d[1] = s[0];
/* Track */
d[2] = s[1];
/* Index */
d[3] = s[2];
/* TrackPos */
d[4] = s[3];
d[5] = s[4];
d[6] = s[5];
/* DiskPos */
d[7] = 0;
d[8] = s[7];
d[9] = s[8];
d[10] = s[9];
if (as == AUDIO_STATUS_IN_PROGRESS) {
/* Make sure end of disc position is not missed.
*/
if (last_play_pos >= cdrom_toc_cd_buffer.lastaddress || cdrom_toc_cd_buffer.lastaddress - last_play_pos < 10) {
int msf = lsn2msf (cdrom_toc_cd_buffer.lastaddress);
d[8] = tobcd ((uae_u8)(msf >> 16));
d[9] = tobcd ((uae_u8)(msf >> 8));
d[10] = tobcd ((uae_u8)(msf >> 0));
}
}
// write_log (_T("%02X.%02X.%02X.%02X.%02X.%02X.%02X.%02X.%02X.%02X.%02X.%02X\n"),
// d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7], d[8], d[9], d[10], d[11]);
return 0;
}
/* read toc */
static int get_cdrom_toc (void)
{
int j;
int datatrack = 0, secondtrack = 0;
cdrom_toc_counter = -1;
if (!sys_command_cd_toc (unitnum, &cdrom_toc_cd_buffer))
return 1;
memset (cdrom_toc_buffer, 0, MAX_TOC_ENTRIES * 13);
for (j = 0; j < cdrom_toc_cd_buffer.points; j++) {
struct cd_toc *s = &cdrom_toc_cd_buffer.toc[j];
uae_u8 *d = &cdrom_toc_buffer[j * 13];
int addr = s->paddress;
int msf = lsn2msf (addr);
if (s->point == 0xa0 || s->point == 0xa1)
msf = s->track << 16;
d[1] = (s->adr << 0) | (s->control << 4);
d[3] = s->point < 100 ? tobcd (s->point) : s->point;
d[8] = tobcd ((msf >> 16) & 0xff);
d[9] = tobcd ((msf >> 8) & 0xff);
d[10] = tobcd ((msf >> 0) & 0xff);
if (s->point == 1 && (s->control & 0x0c) == 0x04)
datatrack = 1;
if (s->point >= 2 && s->point < 100 && (s->control & 0x0c) != 0x04 && !secondtrack)
secondtrack = addr;
}
cdrom_toc_crc = get_crc32 (cdrom_toc_buffer, cdrom_toc_cd_buffer.points * 13);
return 0;
}
static bool is_valid_data_sector(int sector)
{
for (int i = 0; i < cdrom_toc_cd_buffer.points; i++) {
struct cd_toc *s = &cdrom_toc_cd_buffer.toc[i];
if (s->point < 1 || s->point > 99)
continue;
if ((s->control & 0x0c) != 4)
continue;
if (sector >= s->paddress && (sector < s[1].paddress || s[1].point >= 0xa1))
return true;
}
return false;
}
/* open device */
static int sys_cddev_open (void)
{
struct device_info di;
unitnum = get_standard_cd_unit (CD_STANDARD_UNIT_CD32);
sys_command_info (unitnum, &di, 0);
write_log (_T("using drive %s (unit %d, media %d)\n"), di.label, unitnum, di.media_inserted);
/* make sure CD audio is not playing */
cdaudiostop_do ();
return 0;
}
/* close device */
static void sys_cddev_close (void)
{
if (unitnum >= 0) {
cdaudiostop_do ();
sys_command_close (unitnum);
}
unitnum = -1;
}
static int command_lengths[] = { 1,2,1,1,12,2,1,1,4,1,2,-1,-1,-1,-1,-1 };
static int cdrom_start_return_data (int len)
{
if (cdrom_receive_length > 0)
return 0;
if (len <= 0)
return -1;
cdrom_receive_length = len;
cdrom_receive_offset = -1;
return 1;
}
/*
RX DMA channel writes bytes to memory if DMA enabled, cdcomrxinx != cdcomrxcmp
and there is data available from CDROM firmware code.
Triggers CDINTERRUPT_RXDMADONE and stops transfer (even if there is
more data available) when cdcomrxinx matches cdcomrxcmp
*/
static void cdrom_return_data (void)
{
uae_u32 cmd_buf = cdrx_address;
int i;
uae_u8 checksum;
if (!cdrom_receive_length)
return;
if (!(cdrom_flags & CDFLAG_RXD))
return;
if (cdcomrxinx == cdcomrxcmp)
return;
#if AKIKO_DEBUG_IO
write_log (_T("OUT IDX=0x%02X-0x%02X LEN=%d,%08x:"), cdcomrxinx, cdcomrxcmp, cdrom_receive_length, cmd_buf);
#endif
if (cdrom_receive_offset < 0) {
checksum = 0xff;
for (i = 0; i < cdrom_receive_length; i++) {
checksum -= cdrom_result_buffer[i];
#if AKIKO_DEBUG_IO
write_log (_T("%02X "), cdrom_result_buffer[i]);
#endif
}
#if AKIKO_DEBUG_IO
write_log (_T("(%02X)\n"), checksum);
#endif
cdrom_result_buffer[cdrom_receive_length++] = checksum;
cdrom_receive_offset = 0;
} else {
#if AKIKO_DEBUG_IO
write_log (_T("\n"));
#endif
}
while (cdrom_receive_offset < cdrom_receive_length && cdcomrxinx != cdcomrxcmp) {
put_byte (cmd_buf + cdcomrxinx, cdrom_result_buffer[cdrom_receive_offset]);
cdcomrxinx++;
cdrom_receive_offset++;
}
if (cdcomrxinx == cdcomrxcmp) {
set_status (CDINTERRUPT_RXDMADONE);
#if AKIKO_DEBUG_IO
write_log (_T("RXDMADONE %d/%d\n"), cdrom_receive_offset, cdrom_receive_length);
#endif
}
if (cdrom_receive_offset == cdrom_receive_length)
cdrom_receive_length = 0;
}
static int cdrom_command_led (void)
{
int v = cdrom_command_buffer[1];
int old = cdrom_led;
cdrom_led &= ~LED_CD_ACTIVE;
cdrom_led |= (v & 1) ? LED_CD_ACTIVE : 0;
if (cdrom_led != old)
gui_flicker_led (LED_CD, 0, cdrom_led);
if (v & 0x80) { // result wanted?
cdrom_result_buffer[0] = cdrom_command;
cdrom_result_buffer[1] = (cdrom_led & LED_CD_ACTIVE) ? 1 : 0;
return 2;
}
return 0;
}
static int cdrom_command_idle_status (void)
{
cdrom_result_buffer[0] = 0x0a;
cdrom_result_buffer[1] = 0x70;
return 2;
}
static int cdrom_command_media_status (void)
{
cdrom_result_buffer[0] = 0x0a;
cdrom_result_buffer[1] = sys_command_ismedia (unitnum, 0) > 0 ? 0x83: 0x80;
return 2;
}
/* check if cd drive door is open or closed, return firmware info */
static int cdrom_command_status (void)
{
cdrom_result_buffer[1] = 0x01;
//cdrom_result_buffer[1] = 0x80; door open
if (unitnum >= 0)
get_cdrom_toc ();
/* firmware info */
memcpy (cdrom_result_buffer + 2, FIRMWAREVERSION, sizeof FIRMWAREVERSION);
cdrom_result_buffer[0] = cdrom_command;
cd_initialized = 1;
return 20;
}
/* return one TOC entry, each TOC entry repeats 3 times */
#define TOC_REPEAT 3
static int cdrom_return_toc_entry (void)
{
cdrom_result_buffer[0] = 6;
#if AKIKO_DEBUG_IO_CMD
write_log (_T("CD32: TOC entry %d/%d\n"), cdrom_toc_counter / TOC_REPEAT, cdrom_toc_cd_buffer.points);
#endif
if (cdrom_toc_cd_buffer.points == 0) {
cdrom_result_buffer[1] = CDS_ERROR;
return 15;
}
cdrom_result_buffer[1] = 0;
memcpy (cdrom_result_buffer + 2, cdrom_toc_buffer + (cdrom_toc_counter / TOC_REPEAT) * 13, 13);
cdrom_toc_counter++;
if (cdrom_toc_counter / TOC_REPEAT >= cdrom_toc_cd_buffer.points)
cdrom_toc_counter = -1;
return 15;
}
static int checkerr (void)
{
if (!cdrom_disk) {
cdrom_result_buffer[1] = CH_ERR_NODISK;
return 1;
}
return 0;
}
static int cdrom_command_stop (void)
{
cdrom_audiotimeout = 0;
cdrom_result_buffer[0] = cdrom_command;
if (checkerr ())
return 2;
cdrom_result_buffer[1] = 0;
cdaudiostop ();
return 2;
}
/* pause CD audio */
static int cdrom_command_pause (void)
{
#if AKIKO_DEBUG_IO_CMD
write_log (_T("CD32: pause: %d, %d\n"), cdrom_paused, cdrom_playing);
#endif
cdrom_audiotimeout = 0;
cdrom_toc_counter = -1;
cdrom_result_buffer[0] = cdrom_command;
if (checkerr ())
return 2;
cdrom_result_buffer[1] = cdrom_playing ? CDS_PLAYING : 0;
if (cdrom_paused)
return 2;
cdrom_paused = 1;
if (!cdrom_playing)
return 2;
write_comm_pipe_u32 (&requests, 0x0102, 1);
return 2;
}
/* unpause CD audio */
static int cdrom_command_unpause (void)
{
#if AKIKO_DEBUG_IO_CMD
write_log (_T("CD32: unpause: %d, %d\n"), cdrom_paused, cdrom_playing);
#endif
cdrom_result_buffer[0] = cdrom_command;
if (checkerr ())
return 2;
cdrom_result_buffer[1] = cdrom_playing ? CDS_PLAYING : 0;
if (!cdrom_paused)
return 2;
cdrom_paused = 0;
if (!cdrom_playing)
return 2;
write_comm_pipe_u32 (&requests, 0x0103, 1);
return 2;
}
/* seek head/play CD audio/read data sectors */
static int cdrom_command_multi (void)
{
int seekpos = msf2lsn (fromlongbcd (cdrom_command_buffer + 1));
int endpos = msf2lsn (fromlongbcd (cdrom_command_buffer + 4));
if (cdrom_playing)
cdaudiostop ();
cdrom_speed = (cdrom_command_buffer[8] & 0x40) ? 2 : 1;
cdrom_result_buffer[0] = cdrom_command;
cdrom_result_buffer[1] = 0;
if (!cdrom_disk) {
cdrom_result_buffer[1] = 1; // no disk
return 2;
}
if (cdrom_command_buffer[7] == 0x80) { /* data read */
#if AKIKO_DEBUG_IO_CMD
int cdrom_data_offset_end = endpos;
#endif
cdrom_data_offset = seekpos;
cdrom_seek_delay = abs (cdrom_current_sector - cdrom_data_offset);
if (cdrom_seek_delay < 100 || currprefs.cd_speed == 0) {
cdrom_seek_delay = 1;
} else {
cdrom_seek_delay /= 1000;
cdrom_seek_delay += 10;
if (cdrom_seek_delay > 100)
cdrom_seek_delay = 100;
}
#if AKIKO_DEBUG_IO_CMD
write_log (_T("READ DATA %06X (%d) - %06X (%d) SPD=%dx PC=%08X\n"),
seekpos, cdrom_data_offset, endpos, cdrom_data_offset_end, cdrom_speed, M68K_GETPC);
#endif
cdrom_result_buffer[1] |= 0x02;
} else if (cdrom_command_buffer[10] & 4) { /* play audio */
#if AKIKO_DEBUG_IO_CMD
int scan = 0;
if (cdrom_command_buffer[7] & 0x04)
scan = 1;
else if (cdrom_command_buffer[7] & 0x08)
scan = -1;
write_log (_T("PLAY FROM %06X (%d) to %06X (%d) SCAN=%d\n"),
seekpos, msf2lsn (seekpos), endpos, msf2lsn (endpos), scan);
#endif
//cdrom_result_buffer[1] |= CDS_PLAYING;
cdrom_playing = 1;
if (!cd_play_audio (seekpos, endpos, 0)) {
// play didn't start, report it in next status packet
cdrom_audiotimeout = -3;
}
} else {
#if AKIKO_DEBUG_IO_CMD
write_log (_T("SEEKTO %06X\n"),seekpos);
#endif
if (seekpos < 150)
cdrom_toc_counter = 0;
else
cdrom_toc_counter = -1;
}
return 2;
}
static int cdrom_playend_notify (int status)
{
cdrom_result_buffer[0] = 4;
if (status < 0)
cdrom_result_buffer[1] = 0x80; // error
else if (status == 0)
cdrom_result_buffer[1] = 0x08; // play started
else
cdrom_result_buffer[1] = 0x00; // play ended
return 2;
}
/* return subq entry */
static int cdrom_command_subq (void)
{
cdrom_result_buffer[0] = cdrom_command;
cdrom_result_buffer[1] = 0;
cd_qcode (cdrom_result_buffer + 2);
return 15;
}
/*
TX DMA reads bytes from memory and sends them to
CDROM hardware if TX DMA enabled, CDROM data transfer
DMA not enabled and cdcomtxinx != cdcomtx.
CDINTERRUPT_TXDMADONE triggered when cdromtxinx matches cdcomtx.
*/
static void cdrom_run_command (void)
{
int i, cmd_len;
uae_u8 checksum;
#if 0
uae_u8 *pp = get_real_address (cdtx_address);
#endif
if (!(cdrom_flags & CDFLAG_TXD))
return;
if ((cdrom_flags & CDFLAG_ENABLE))
return;
if (cdrom_command_active)
return;
if (cdrom_receive_length)
return;
if (cdcomtxinx == cdcomtxcmp)
return;
if (cdrom_tx_dma_delay > 0)
return;
cdrom_command = get_byte (cdtx_address + cdcomtxinx);
if (cdrom_command == 0) {
cdcomtxinx++;
return;
}
cdrom_checksum_error = 0;
cdrom_unknown_command = 0;
cmd_len = command_lengths[cdrom_command & 0x0f];
if (cmd_len < 0) {
#if AKIKO_DEBUG_IO_CMD
write_log (_T("unknown command %x\n"), cdrom_command & 0x0f);
#endif
cdrom_unknown_command = 1;
cdrom_command_active = 1;
cdrom_command_length = 1;
set_status (CDINTERRUPT_TXDMADONE);
return;
}
#if AKIKO_DEBUG_IO_CMD
write_log (_T("IN CMD=%02X IDX=0x%02X-0x%02X LEN=%d:"), cdrom_command & 0x0f, cdcomtxinx, cdcomtxcmp, cmd_len);
#endif
checksum = 0;
for (i = 0; i < cmd_len + 1; i++) {
cdrom_command_buffer[i] = get_byte (cdtx_address + ((cdcomtxinx + i) & 0xff));
checksum += cdrom_command_buffer[i];
#if AKIKO_DEBUG_IO_CMD
if (i == cmd_len)
write_log (_T("(%02X) "), cdrom_command_buffer[i]); // checksum
else
write_log (_T("%02X "), cdrom_command_buffer[i]);
#endif
}
if (checksum != 0xff) {
#if AKIKO_DEBUG_IO_CMD
write_log (_T(" checksum error"));
#endif
cdrom_checksum_error = 1;
//activate_debugger ();
}
#if AKIKO_DEBUG_IO_CMD
write_log (_T("\n"));
#endif
cdrom_command_active = 1;
cdrom_command_length = cmd_len;
set_status (CDINTERRUPT_TXDMADONE);
}
static void cdrom_run_command_run (void)
{
int len;
cdcomtxinx = cdcomtxinx + cdrom_command_length + 1;
memset (cdrom_result_buffer, 0, sizeof (cdrom_result_buffer));
if (cdrom_checksum_error || cdrom_unknown_command) {
cdrom_result_buffer[0] = (cdrom_command & 0xf0) | 5;
if (cdrom_checksum_error)
cdrom_result_buffer[1] |= CH_ERR_CHECKSUM;
else if (cdrom_unknown_command)
cdrom_result_buffer[1] |= CH_ERR_BADCOMMAND;
len = 2;
cdrom_start_return_data (len);
return;