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akiko2.cpp
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/*
* UAE - The Un*x Amiga Emulator
*
* CD32 Akiko emulation
*
* - C2P
* - NVRAM
* - CDROM
*
* Copyright 2001, 2002 Toni Wilen
*
*/
#include "sysconfig.h"
#include "sysdeps.h"
#include "config.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"
#define AKIKO_DEBUG_NVRAM 0
#define AKIKO_DEBUG_IO 1
#define AKIKO_DEBUG_IO_CMD 1
int cd32_enabled;
static int m68k_getpc (void) { return 0; }
/*
* 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)
*
* Because I don't have any experience on I2C, following code may be
* unnecessarily complex and not 100% correct..
*/
enum i2c { I2C_WAIT, I2C_START, I2C_DEVICEADDR, I2C_WORDADDR, I2C_DATA };
/* size of EEPROM, don't try to change,
* (hardcoded in Kickstart)
*/
#define NVRAM_SIZE 1024
/* max size of one write request */
#define NVRAM_PAGE_SIZE 16
static uae_u8 cd32_nvram[NVRAM_SIZE], nvram_writetmp[NVRAM_PAGE_SIZE];
static int nvram_address, nvram_writeaddr;
static int nvram_rw;
static int bitcounter = -1, direction = -1;
static uae_u8 nvram_byte;
static int scl_out, scl_in, scl_dir, oscl, sda_out, sda_in, sda_dir, osda;
static int sda_dir_nvram;
static int state = I2C_WAIT;
static void nvram_write (int offset, int len)
{
struct zfile *f = zfile_fopen (currprefs.flashfile, "rb+");
if (!f) {
f = zfile_fopen (currprefs.flashfile, "wb");
if (!f) return;
zfile_fwrite (cd32_nvram, NVRAM_SIZE, 1, f);
zfile_fclose (f);
}
zfile_fseek (f, offset, SEEK_SET);
zfile_fwrite (cd32_nvram + offset, len, 1, f);
zfile_fclose (f);
}
static void nvram_read (void)
{
struct zfile *f;
f = zfile_fopen (currprefs.flashfile, "rb");
memset (cd32_nvram, 0, NVRAM_SIZE);
if (!f) return;
zfile_fread (cd32_nvram, NVRAM_SIZE, 1, f);
zfile_fclose (f);
}
static void i2c_do (void)
{
#if AKIKO_DEBUG_NVRAM
int i;
#endif
sda_in = 1;
if (!sda_dir_nvram && scl_out && oscl) {
if (!sda_out && osda) { /* START-condition? */
state = I2C_DEVICEADDR;
bitcounter = 0;
direction = -1;
#if AKIKO_DEBUG_NVRAM
write_log ("START\n");
#endif
return;
} else if(sda_out && !osda) { /* STOP-condition? */
state = I2C_WAIT;
bitcounter = -1;
#if AKIKO_DEBUG_NVRAM
write_log ("STOP\n");
#endif
if (direction > 0) {
memcpy (cd32_nvram + (nvram_address & ~(NVRAM_PAGE_SIZE - 1)), nvram_writetmp, NVRAM_PAGE_SIZE);
nvram_write (nvram_address & ~(NVRAM_PAGE_SIZE - 1), NVRAM_PAGE_SIZE);
direction = -1;
#if AKIKO_DEBUG_NVRAM
write_log ("NVRAM write address %04X:", nvram_address & ~(NVRAM_PAGE_SIZE - 1));
for (i = 0; i < NVRAM_PAGE_SIZE; i++)
write_log ("%02X", nvram_writetmp[i]);
write_log ("\n");
#endif
}
return;
}
}
if (bitcounter >= 0) {
if (direction) {
/* Amiga -> NVRAM */
if (scl_out && !oscl) {
if (bitcounter == 8) {
#if AKIKO_DEBUG_NVRAM
write_log ("RB %02X ", nvram_byte, m68k_getpc ());
#endif
sda_in = 0; /* ACK */
if (direction > 0) {
nvram_writetmp[nvram_writeaddr++] = nvram_byte;
nvram_writeaddr &= 15;
bitcounter = 0;
} else {
bitcounter = -1;
}
} else {
//write_log ("NVRAM received bit %d, offset %d\n", sda_out, bitcounter);
nvram_byte <<= 1;
nvram_byte |= sda_out;
bitcounter++;
}
}
} else {
/* NVRAM -> Amiga */
if (scl_out && !oscl && bitcounter < 8) {
if (bitcounter == 0)
nvram_byte = cd32_nvram[nvram_address];
sda_dir_nvram = 1;
sda_in = (nvram_byte & 0x80) ? 1 : 0;
//write_log ("NVRAM sent bit %d, offset %d\n", sda_in, bitcounter);
nvram_byte <<= 1;
bitcounter++;
if (bitcounter == 8) {
#if AKIKO_DEBUG_NVRAM
write_log ("NVRAM sent byte %02X address %04X PC=%08X\n", cd32_nvram[nvram_address], nvram_address, m68k_getpc ());
#endif
nvram_address++;
nvram_address &= NVRAM_SIZE - 1;
sda_dir_nvram = 0;
}
}
if(!sda_out && sda_dir && !scl_out) /* ACK from Amiga */
bitcounter = 0;
}
if (bitcounter >= 0) return;
}
switch (state)
{
case I2C_DEVICEADDR:
if ((nvram_byte & 0xf0) != 0xa0) {
write_log ("WARNING: I2C_DEVICEADDR: device address != 0xA0\n");
state = I2C_WAIT;
return;
}
nvram_rw = (nvram_byte & 1) ? 0 : 1;
if (nvram_rw) {
/* 2 high address bits, only fetched if WRITE = 1 */
nvram_address &= 0xff;
nvram_address |= ((nvram_byte >> 1) & 3) << 8;
state = I2C_WORDADDR;
direction = -1;
} else {
state = I2C_DATA;
direction = 0;
sda_dir_nvram = 1;
}
bitcounter = 0;
#if AKIKO_DEBUG_NVRAM
write_log ("I2C_DEVICEADDR: rw %d, address %02Xxx PC=%08X\n", nvram_rw, nvram_address >> 8, m68k_getpc ());
#endif
break;
case I2C_WORDADDR:
nvram_address &= 0x300;
nvram_address |= nvram_byte;
#if AKIKO_DEBUG_NVRAM
write_log ("I2C_WORDADDR: address %04X PC=%08X\n", nvram_address, m68k_getpc ());
#endif
if (direction < 0) {
memcpy (nvram_writetmp, cd32_nvram + (nvram_address & ~(NVRAM_PAGE_SIZE - 1)), NVRAM_PAGE_SIZE);
nvram_writeaddr = nvram_address & (NVRAM_PAGE_SIZE - 1);
}
state = I2C_DATA;
bitcounter = 0;
direction = 1;
break;
}
}
static void akiko_nvram_write (int offset, uae_u32 v)
{
int sda;
switch (offset)
{
case 0:
oscl = scl_out;
scl_out = (v & 0x80) ? 1 : 0;
osda = sda_out;
sda_out = (v & 0x40) ? 1 : 0;
break;
case 2:
scl_dir = (v & 0x80) ? 1 : 0;
sda_dir = (v & 0x40) ? 1 : 0;
break;
default:
return;
}
sda = sda_out;
if (oscl != scl_out || osda != sda) {
i2c_do ();
oscl = scl_out;
osda = sda;
}
}
static uae_u32 akiko_nvram_read (int offset)
{
uae_u32 v = 0;
switch (offset)
{
case 0:
if (!scl_dir)
v |= scl_in ? 0x80 : 0x00;
else
v |= scl_out ? 0x80 : 0x00;
if (!sda_dir)
v |= sda_in ? 0x40 : 0x00;
else
v |= sda_out ? 0x40 : 0x00;
break;
case 2:
v |= scl_dir ? 0x80 : 0x00;
v |= sda_dir ? 0x40 : 0x00;
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];
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);
}
}
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
*
* I can't believe cd.device and custom loaders are fooled to think
* this piece of crap emulates real CD32 CDROM controller and drive :)
*/
#define CDSTATUS_FRAME 0x80000000
#define CDSTATUS_DATA_AVAILABLE 0x10000000
#define CDSTATUS_DATASECTOR_ERROR 0x08000000 /* ?? */
#define CDSTATUS_DATASECTOR 0x04000000
#define CDS_ERROR 0x80
#define CDS_PLAYING 0x08
static uae_u32 cdrom_status1, cdrom_status2;
static uae_u8 cdrom_status3;
static uae_u32 cdrom_address1, cdrom_address2;
static uae_u32 cdrom_longmask;
static uae_u32 cdrom_readmask_r, cdrom_readmask_w;
static uae_u8 cdrom_command_offset_complete; /* 0x19 */
static uae_u8 cdrom_command_offset_todo; /* 0x1d */
static uae_u8 cdrom_result_complete; /* 0x1a */
static uae_u8 cdrom_result_last_pos; /* 0x1f */
static uae_u8 cdrom_result_buffer[32];
static uae_u8 cdrom_command_buffer[32];
static uae_u8 cdrom_command;
#define MAX_TOC_ENTRIES 103 /* tracks 1-99, A0,A1 and A2 */
static int cdrom_toc_entries;
static int cdrom_toc_counter;
static uae_u8 cdrom_toc_buffer[MAX_TOC_ENTRIES*13];
static int cdrom_disk, cdrom_paused, cdrom_playing;
static int cdrom_command_active;
static int cdrom_command_length;
static int cdrom_checksum_error;
static int cdrom_data_offset, cdrom_speed, cdrom_sector_counter;
static int cdrom_current_sector;
static int cdrom_data_end, cdrom_leadout;
static int cdrom_dosomething;
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 uae_u8 frombcd (uae_u8 v)
{
return (v >> 4) * 10 + (v & 15);
}
static uae_u8 tobcd (uae_u8 v)
{
return ((v / 10) << 4) | (v % 10);
}
static int fromlongbcd (uae_u8 *p)
{
return (frombcd (p[0]) << 16) | (frombcd (p[1]) << 8) | (frombcd (p[2]) << 0);
}
/* convert minutes, seconds and frames -> logical sector number */
static int msf2lsn (int msf)
{
int sector = (((msf >> 16) & 0xff) * 60 * 75 + ((msf >> 8) & 0xff) * 75 + ((msf >> 0) & 0xff)) - 150;
if (sector < 0)
sector = 0;
return sector;
}
/* convert logical sector number -> minutes, seconds and frames */
static int lsn2msf (int sectors)
{
int msf;
sectors += 150;
msf = (sectors / (75 * 60)) << 16;
msf |= ((sectors / 75) % 60) << 8;
msf |= (sectors % 75) << 0;
return msf;
}
static uae_u32 last_play_end;
static int cd_play_audio (uae_u32 startmsf, uae_u32 endmsf, int scan)
{
if (endmsf == 0xffffffff)
endmsf = last_play_end;
else
last_play_end = endmsf;
return sys_command_play (DF_IOCTL, unitnum,startmsf, endmsf, scan);
}
/* read qcode */
static uae_u32 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 = sys_command_qcode (DF_IOCTL, unitnum);
if (!buf)
return 0;
as = buf[1];
if (as != 0x11 && as != 0x12 && as != 0x13 && as != 0x15) /* audio status ok? */
return 0;
s = buf + 4;
last_play_pos = (s[9] << 16) | (s[10] << 8) | (s[11] << 0);
if (!d)
return 0;
/* ??? */
d[0] = 0;
/* CtlAdr */
d[1] = (s[1] >> 4) | (s[1] << 4);
/* Track */
d[2] = tobcd (s[2]);
/* Index */
d[3] = tobcd (s[3]);
/* TrackPos */
d[4] = tobcd (s[9]);
d[5] = tobcd (s[10]);
d[6] = tobcd (s[11]);
/* DiskPos */
d[7] = 0;
d[8] = tobcd (s[5]);
d[9] = tobcd (s[6]);
d[10] = tobcd (s[7]);
if (as == 0x15) {
/* Make sure end of disc position is passed.
*/
int lsn = msf2lsn ((s[5] << 16) | (s[6] << 8) | (s[7] << 0));
int msf = lsn2msf (cdrom_leadout);
if (lsn >= cdrom_leadout || cdrom_leadout - lsn < 10) {
d[8] = tobcd ((uae_u8)(msf >> 16));
d[9] = tobcd ((uae_u8)(msf >> 8));
d[10] = tobcd ((uae_u8)(msf >> 0));
}
}
return 0;
}
/* read toc */
static int cdrom_toc (void)
{
int i, j;
int datatrack = 0, secondtrack = 0;
uae_u8 *s, *d, *buf;
cdrom_toc_counter = -1;
cdrom_toc_entries = 0;
buf = sys_command_toc (DF_IOCTL, unitnum);
if (!buf)
return 1;
i = (buf[0] << 8) | (buf[1] << 0);
i -= 2;
i /= 11;
if (i > MAX_TOC_ENTRIES)
return -1;
memset (cdrom_toc_buffer, 0, MAX_TOC_ENTRIES * 13);
cdrom_data_end = -1;
for (j = 0; j < i; j++) {
s = buf + 4 + j * 11;
d = &cdrom_toc_buffer[j * 13];
d[1] = (s[1] >> 4) | (s[1] << 4);
d[3] = s[3] < 100 ? tobcd(s[3]) : s[3];
d[8] = tobcd (s[8]);
d[9] = tobcd (s[9]);
d[10] = tobcd (s[10]);
if (s[3] == 1 && (s[1] & 0x0f) == 0x04)
datatrack = 1;
if (s[3] == 2)
secondtrack = msf2lsn ((s[8] << 16) | (s[9] << 8) | (s[10] << 0));
if (s[3] == 0xa2)
cdrom_leadout = msf2lsn ((s[8] << 16) | (s[9] << 8) | (s[10] << 0));
}
if (datatrack) {
if (secondtrack)
cdrom_data_end = secondtrack;
else
cdrom_data_end = cdrom_leadout;
}
cdrom_toc_entries = i;
return 0;
}
/* open device */
static int sys_cddev_open (void)
{
int first = -1;
int found = 0;
struct device_info di1, *di2;
for (unitnum = 0; unitnum < MAX_TOTAL_DEVICES; unitnum++) {
di2 = sys_command_info (DF_IOCTL, unitnum, &di1);
if (di2 && di2->type == INQ_ROMD) {
if (sys_command_open (DF_IOCTL, unitnum)) {
if (first < 0)
first = unitnum;
if (!cdrom_toc ()) {
found = 1;
break;
}
sys_command_close (DF_IOCTL, unitnum);
}
}
}
if (!found) {
if (first >= 0) {
unitnum = first;
sys_command_open (DF_IOCTL, unitnum);
} else {
unitnum = -1;
return 1;
}
}
/* make sure CD audio is not playing */
sys_command_pause (DF_IOCTL, unitnum, 0);
sys_command_stop (DF_IOCTL, unitnum);
sys_command_pause (DF_IOCTL, unitnum, 1);
return 0;
}
/* close device */
static void sys_cddev_close (void)
{
sys_command_pause (DF_IOCTL, unitnum, 0);
sys_command_stop (DF_IOCTL, unitnum);
sys_command_pause (DF_IOCTL, unitnum, 1);
sys_command_close (DF_IOCTL, unitnum);
}
static int command_lengths[] = { 1,2,1,1,12,2,1,1,4,1,-1,-1,-1,-1,-1 };
static void cdrom_return_data (int len)
{
uae_u32 cmd_buf = cdrom_address2;
int i;
uae_u8 checksum;
if (len <= 0) return;
#if AKIKO_DEBUG_IO_CMD
write_log ("OUT:");
#endif
checksum = 0xff;
for (i = 0; i < len; i++) {
checksum -= cdrom_result_buffer[i];
put_byte (cmd_buf + ((cdrom_result_complete + i) & 0xff), cdrom_result_buffer[i]);
#if AKIKO_DEBUG_IO_CMD
write_log ("%02X ", cdrom_result_buffer[i]);
#endif
}
put_byte (cmd_buf + ((cdrom_result_complete + len) & 0xff), checksum);
#if AKIKO_DEBUG_IO_CMD
write_log ("%02X\n", checksum);
#endif
cdrom_result_complete += len + 1;
cdrom_status1 |= CDSTATUS_DATA_AVAILABLE;
}
static int cdrom_command_something (void)
{
return 0;
}
static int cdrom_command_media_status (void)
{
struct device_info di;
cdrom_result_buffer[0] = cdrom_command;
cdrom_result_buffer[1] = sys_command_info (DF_IOCTL, unitnum, &di)->media_inserted ? 1 : 0;
return 2;
}
/* check if cd drive door is open or closed */
static int cdrom_command_door_status (void)
{
struct device_info di;
if (!sys_command_info (DF_IOCTL, unitnum, &di)->media_inserted) {
cdrom_result_buffer[1] = 0x80;
cdrom_disk = 0;
} else {
cdrom_result_buffer[1] = 1;
cdrom_disk = 1;
}
cdrom_toc ();
cdrom_result_buffer[0] = cdrom_command;
return 20;
}
/* return one TOC entry */
static int cdrom_return_toc_entry (void)
{
cdrom_result_buffer[0] = 6;
if (cdrom_toc_entries == 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 * 13, 13);
cdrom_toc_counter++;
if (cdrom_toc_counter >= cdrom_toc_entries)
cdrom_toc_counter = 0;
return 15;
}
/* pause CD audio */
static int cdrom_command_pause (void)
{
cdrom_toc_counter = -1;
cdrom_result_buffer[0] = cdrom_command;
cdrom_result_buffer[1] = cdrom_playing ? CDS_PLAYING : 0;
if (!cdrom_playing)
return 2;
if (cdrom_paused)
return 2;
sys_command_pause (DF_IOCTL, unitnum, 1);
cdrom_paused = 1;
return 2;
}
/* unpause CD audio */
static int cdrom_command_unpause (void)
{
cdrom_result_buffer[0] = cdrom_command;
cdrom_result_buffer[1] = cdrom_playing ? CDS_PLAYING : 0;
if (!cdrom_paused)
return 2;
if (!cdrom_playing)
return 2;
cdrom_paused = 0;
sys_command_pause (DF_IOCTL, unitnum, 0);
return 2;
}
/* seek head/play CD audio/read data sectors */
static int cdrom_command_multi (void)
{
int seekpos = fromlongbcd (cdrom_command_buffer + 1);
int endpos = fromlongbcd (cdrom_command_buffer + 4);
cdrom_playing = 0;
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] |= CDS_ERROR;
return 2;
}
if (cdrom_command_buffer[7] == 0x80) { /* data read */
int cdrom_data_offset_end = msf2lsn (endpos);
cdrom_data_offset = msf2lsn (seekpos);
#if AKIKO_DEBUG_IO_CMD
write_log ("READ DATA FROM %06X (%d) TO %06X (%d) SPEED=%dx\n", seekpos, cdrom_data_offset, endpos, cdrom_data_offset_end, cdrom_speed);
#endif
cdrom_result_buffer[1] |= 0x02;
} else if (cdrom_command_buffer[10] & 4) { /* play audio */
int scan = 0;
if (cdrom_command_buffer[7] & 0x04)
scan = 1;
else if (cdrom_command_buffer[7] & 0x08)
scan = -1;
#if AKIKO_DEBUG_IO_CMD
write_log ("PLAY FROM %06X to %06X SCAN=%d\n", seekpos, endpos, scan);
#endif
if (!cd_play_audio (seekpos, endpos, 0)) {
cdrom_result_buffer[1] = CDS_ERROR;
} else {
cdrom_playing = 1;
cdrom_result_buffer[1] |= CDS_PLAYING;
}
} else {
#if AKIKO_DEBUG_IO_CMD
write_log ("SEEKTO %06X\n",seekpos);
#endif
if (seekpos < 150)
cdrom_toc_counter = 0;
else
cdrom_toc_counter = -1;
}
return 2;
}
/* return subq entry */
static int cdrom_command_subq (void)
{
cdrom_result_buffer[0] = cdrom_command;
cdrom_result_buffer[1] = 0;
if (cd_qcode (cdrom_result_buffer + 2))
cdrom_result_buffer[1] = CDS_ERROR;
return 15;
}
static void cdrom_run_command (void)
{
uae_u32 cmd_buf = cdrom_address2 + 0x200;
int i, cmd_len;
uae_u8 checksum;
for (;;) {
if (cdrom_command_active)
return;
if (cdrom_command_offset_complete == cdrom_command_offset_todo)
return;
cdrom_command = get_byte (cmd_buf + cdrom_command_offset_complete);
if ((cdrom_command & 0xf0) == 0)
return;
cdrom_checksum_error = 0;
cmd_len = command_lengths[cdrom_command & 0x0f];
if (cmd_len < 0) {
#if AKIKO_DEBUG_IO_CMD
write_log ("unknown command\n");
#endif
cmd_len = 1;
}
#if AKIKO_DEBUG_IO_CMD
write_log ("IN:");
#endif
checksum = 0;
for (i = 0; i < cmd_len + 1; i++) {
cdrom_command_buffer[i] = get_byte (cmd_buf + ((cdrom_command_offset_complete + i) & 0xff));
checksum += cdrom_command_buffer[i];
#if AKIKO_DEBUG_IO_CMD
write_log ("%02X ", cdrom_command_buffer[i]);
#endif
}
if (checksum!=0xff) {
#if AKIKO_DEBUG_IO_CMD
write_log (" checksum error");
#endif
cdrom_checksum_error = 1;
}
#if AKIKO_DEBUG_IO_CMD
write_log ("\n");
#endif
cdrom_command_active = 1;
cdrom_command_length = cmd_len;
return;
}
}
static void cdrom_run_command_run (void)
{
int len;
cdrom_command_offset_complete = (cdrom_command_offset_complete + cdrom_command_length + 1) & 0xff;
memset (cdrom_result_buffer, 0, sizeof(cdrom_result_buffer));
switch (cdrom_command & 0x0f)
{
case 2:
len = cdrom_command_pause ();
break;
case 3:
len = cdrom_command_unpause ();
break;
case 4:
len = cdrom_command_multi ();
break;
case 5:
cdrom_dosomething = 1;
len = cdrom_command_something ();
break;
case 6:
len = cdrom_command_subq ();
break;
case 7:
len = cdrom_command_door_status ();
break;
default:
len = 0;
break;
}
if (len == 0)
return;
if (cdrom_checksum_error)
cdrom_result_buffer[1] |= 0x80;
cdrom_return_data (len);
}
extern void encode_l2 (uae_u8 *p, int address);
/* DMA transfer one CD sector */
static void cdrom_run_read (void)
{
int i, j, sector;
int read = 0;
uae_u8 buf[2352];
int sec;
if (!(cdrom_longmask & 0x04000000))
return;
if (!cdrom_readmask_w)
return;
if (cdrom_data_offset < 0)
return;
if (unitnum >= 0) {
for (j = 0; j < 16; j++) {
if (cdrom_readmask_w & (1 << j)) break;
}
sector = cdrom_current_sector = cdrom_data_offset + cdrom_sector_counter;
sec = sector - sector_buffer_sector_1;
if (sector_buffer_sector_1 >= 0 && sec >= 0 && sec < SECTOR_BUFFER_SIZE) {
if (sector_buffer_info_1[sec] != 0xff && sector_buffer_info_1[sec] != 0) {
memcpy (buf + 16, sector_buffer_1 + sec * 2048, 2048);
encode_l2 (buf, sector + 150);
buf[0] = 0;
buf[1] = 0;
buf[2] = 0;
buf[3] = cdrom_sector_counter;
for (i = 0; i < 2352; i++)
put_byte (cdrom_address1 + j * 4096 + i, buf[i]);
cdrom_readmask_r |= 1 << j;
}
if (sector_buffer_info_1[sec] != 0xff)
sector_buffer_info_1[sec]--;
} else
return;
#if AKIKO_DEBUG_IO_CMD
write_log ("read sector=%d, scnt=%d -> %d\n", cdrom_data_offset, cdrom_sector_counter, sector);
#endif
cdrom_readmask_w &= ~(1 << j);
cdrom_status1 |= CDSTATUS_DATASECTOR;
}
cdrom_sector_counter++;
}
static uae_sem_t akiko_sem;
static void akiko_handler (void)
{
static int mediacheckcnt;
struct device_info di;
if (cdrom_result_complete > cdrom_result_last_pos && cdrom_result_complete - cdrom_result_last_pos < 100) {
cdrom_status1 |= CDSTATUS_DATA_AVAILABLE;
return;
}
if (cdrom_result_last_pos < cdrom_result_complete)
return;
if (mediacheckcnt > 0)
mediacheckcnt--;
if (mediacheckcnt == 0) {
int media = sys_command_info (DF_IOCTL, unitnum, &di)->media_inserted;
if (media != cdrom_disk) {
write_log ("media changed = %d\n", media);
cdrom_disk = media;
cdrom_return_data (cdrom_command_media_status ());
cdrom_toc ();
return;
}
mediacheckcnt = 312 * 50 * 2;
}
if (cdrom_toc_counter >= 0 && !cdrom_command_active && cdrom_dosomething) {
cdrom_return_data (cdrom_return_toc_entry ());
cdrom_dosomething--;
return;
}
}
static void akiko_internal (void)
{
cdrom_run_command ();
if (cdrom_command_active > 0) {
cdrom_command_active--;
if (!cdrom_command_active)
cdrom_run_command_run ();
}
}
extern int cd32_enabled;
void AKIKO_hsync_handler (void)
{
static int framecounter;
if (!cd32_enabled)
return;
framecounter--;
if (framecounter <= 0) {
cdrom_run_read ();
framecounter = 1000000 / (74 * 75 * cdrom_speed);
cdrom_status1 |= CDSTATUS_FRAME;
}
akiko_internal ();
akiko_handler ();
}
static volatile int akiko_thread_running;
/* cdrom data buffering thread */
static void *akiko_thread (void *null)
{
int i;
uae_u8 *tmp1;
uae_u8 *tmp2;
int tmp3;
uae_u8 *p;
int offset;
int sector;
while(akiko_thread_running) {
uae_sem_wait (&akiko_sem);
sector = cdrom_current_sector;
for (i = 0; i < SECTOR_BUFFER_SIZE; i++) {
if (sector_buffer_info_1[i] == 0xff) break;
}
if (cdrom_data_end > 0 && sector >= 0 && (sector_buffer_sector_1 < 0 || sector < sector_buffer_sector_1 || sector >= sector_buffer_sector_1 + SECTOR_BUFFER_SIZE * 2 / 3 || i != SECTOR_BUFFER_SIZE)) {
memset (sector_buffer_info_2, 0, SECTOR_BUFFER_SIZE);
#if AKIKO_DEBUG_IO_CMD
write_log ("filling buffer sector=%d (max=%d)\n", sector, cdrom_data_end);
#endif
sector_buffer_sector_2 = sector;
offset = 0;
while (offset < SECTOR_BUFFER_SIZE) {
p = 0;
if (sector < cdrom_data_end)
p = sys_command_read (DF_IOCTL, unitnum, sector);
if (p)
memcpy (sector_buffer_2 + offset * 2048, p, 2048);
sector_buffer_info_2[offset] = p ? 3 : 0;
offset++;
sector++;
}
tmp1 = sector_buffer_info_1;
sector_buffer_info_1 = sector_buffer_info_2;
sector_buffer_info_2 = tmp1;
tmp2 = sector_buffer_1;
sector_buffer_1 = sector_buffer_2;
sector_buffer_2 = tmp2;
tmp3 = sector_buffer_sector_1;
sector_buffer_sector_1 = sector_buffer_sector_2;
sector_buffer_sector_2 = tmp3;
}
uae_sem_post (&akiko_sem);
Sleep (10);
}
akiko_thread_running = -1;
return 0;
}
static uae_u8 akiko_get_long (uae_u32 v, int offset)
{
return v >> ((3 - offset) * 8);
}
static void akiko_put_long (uae_u32 *p, int offset, int v)
{
*p &= ~(0xff << ((3 - offset) * 8));
*p |= v << ((3 - offset) * 8);
}
uae_u32 akiko_bget2 (uaecptr addr, int msg)
{
uae_u8 v;
addr &= 0xffff;
uae_sem_wait (&akiko_sem);
switch (addr)
{
/* "CAFE" = Akiko identification.
* Kickstart ignores Akiko C2P if this ID isn't correct */
case 0x02:
v = 0xCA;
break;
case 0x03:
v = 0xFE;
break;
/* CDROM control */
case 0x04:
case 0x05:
case 0x06:
case 0x07:
v = akiko_get_long (cdrom_status1, addr - 0x04);
break;
case 0x08:
case 0x09:
case 0x0a:
case 0x0b:
v = akiko_get_long (cdrom_status2, addr - 0x08);
break;
case 0x10:
case 0x11: