Initial AWACS sound device emulation.

This commit is contained in:
Maxim Poliakovski 2020-03-15 17:24:40 +01:00
parent 9be3250142
commit 751efb4cd6
4 changed files with 213 additions and 8 deletions

83
devices/awacs.cpp Normal file
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@ -0,0 +1,83 @@
/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-20 divingkatae and maximum
(theweirdo) spatium
(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/** AWAC sound device emulation.
Author: Max Poliakovski 2019-20
*/
#include <thirdparty/loguru.hpp>
#include "awacs.h"
#include "machines/machinebase.h"
AWACDevice::AWACDevice()
{
this->audio_proc = new AudioProcessor();
/* register audio processor chip with the I2C bus */
I2CBus *i2c_bus = dynamic_cast<I2CBus *>(gMachineObj->get_comp_by_type(HWCompType::I2C_HOST));
i2c_bus->register_device(0x45, this->audio_proc);
}
AWACDevice::~AWACDevice()
{
delete this->audio_proc;
}
uint32_t AWACDevice::snd_ctrl_read(uint32_t offset, int size)
{
switch(offset) {
case AWAC_SOUND_CTRL_REG:
return this->snd_ctrl_reg;
case AWAC_CODEC_CTRL_REG:
return this->is_busy;
case AWAC_CODEC_STATUS_REG:
return (AWAC_AVAILABLE << 8) | (AWAC_MAKER_CRYSTAL << 16) |
(AWAC_REV_SCREAMER << 20);
break;
default:
LOG_F(ERROR, "AWAC: unsupported register at offset 0x%X", offset);
}
return 0;
}
void AWACDevice::snd_ctrl_write(uint32_t offset, uint32_t value, int size)
{
int subframe, reg_num;
uint16_t data;
switch(offset) {
case AWAC_SOUND_CTRL_REG:
this->snd_ctrl_reg = value;
break;
case AWAC_CODEC_CTRL_REG:
subframe = (value >> 14) & 3;
reg_num = (value >> 20) & 7;
data = ((value >> 8) & 0xF00) | ((value >> 24) & 0xFF);
LOG_F(INFO, "AWAC subframe = %d, reg = %d, data = %08X\n", subframe, reg_num, data);
if (!subframe)
this->control_regs[reg_num] = data;
break;
default:
LOG_F(ERROR, "AWAC: unsupported register at offset 0x%X", offset);
}
}

117
devices/awacs.h Normal file
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/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-20 divingkatae and maximum
(theweirdo) spatium
(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/** AWAC sound devices family definitions.
Audio Waveform Aplifier and Converter (AWAC) is a family of custom audio
chips used in Power Macintosh.
*/
#ifndef AWAC_H
#define AWAC_H
#include <cinttypes>
#include "i2c.h"
/** AWAC registers offsets. */
enum {
AWAC_SOUND_CTRL_REG = 0x00,
AWAC_CODEC_CTRL_REG = 0x10,
AWAC_CODEC_STATUS_REG = 0x20,
};
/** AWAC manufacturer and revision. */
#define AWAC_MAKER_CRYSTAL 1
#define AWAC_REV_SCREAMER 3
/** Apple source calls this kValidData but doesn't explain
what it actually means. It seems like it's used to check
if the sound codec is available.
*/
#define AWAC_AVAILABLE 0x40
/** Audio processor chip (TDA7433) emulation. */
class AudioProcessor : public I2CDevice {
public:
AudioProcessor() = default;
~AudioProcessor() = default;
void start_transaction() { this->pos = 0; };
bool send_subaddress(uint8_t sub_addr) {
if ((sub_addr & 0xF) > 6)
return false; /* invalid subaddress -> no acknowledge */
this->sub_addr = sub_addr & 0xF;
this->auto_inc = !!(sub_addr & 0x10);
LOG_F(INFO, "TDA7433 subaddress = 0x%X, auto increment = %d",
this->sub_addr, this->auto_inc);
this->pos++;
return true;
};
bool send_byte(uint8_t data) {
if (!this->pos) {
return send_subaddress(data);
} else if (this->sub_addr <= 6) {
LOG_F(INFO, "TDA7433 byte 0x%X received", data);
this->regs[this->sub_addr] = data;
if (this->auto_inc) {
this->sub_addr++;
}
return true;
} else {
return false; /* invalid sub_addr -> no acknowledge */
}
};
bool receive_byte(uint8_t *p_data) {
*p_data = this->regs[this->sub_addr];
LOG_F(INFO, "TDA7433 byte 0x%X sent", *p_data);
return true;
};
private:
uint8_t regs[7]; /* control registers, see TDA7433 datasheet */
uint8_t sub_addr;
int pos;
int auto_inc;
};
class AWACDevice {
public:
AWACDevice();
~AWACDevice();
uint32_t snd_ctrl_read(uint32_t offset, int size);
void snd_ctrl_write(uint32_t offset, uint32_t value, int size);
private:
uint32_t snd_ctrl_reg = {0};
uint16_t control_regs[8] = {0}; /* control registers, each 12-bits wide */
uint8_t is_busy = 0;
AudioProcessor *audio_proc;
};
#endif /* AWAC_H */

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@ -24,6 +24,7 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
#include <iostream>
#include "macio.h"
#include "viacuda.h"
#include "awacs.h"
#include "machines/machinebase.h"
/** Heathrow Mac I/O device emulation.
@ -35,10 +36,12 @@ using namespace std;
HeathrowIC::HeathrowIC() : PCIDevice("mac-io/heathrow")
{
this->viacuda = new ViaCuda();
this->nvram = new NVram();
this->nvram = new NVram();
this->viacuda = new ViaCuda();
gMachineObj->add_subdevice("ViaCuda", this->viacuda);
this->screamer = new AWACDevice();
}
HeathrowIC::~HeathrowIC()
@ -93,10 +96,10 @@ uint32_t HeathrowIC::read(uint32_t offset, int size)
res = mio_ctrl_read(offset, size);
break;
case 8:
LOG_F(9, "Attempting to read DMA channel register space \n");
LOG_F(WARNING, "Attempting to read DMA channel register space \n");
break;
case 0x14:
LOG_F(9, "Attempting to read AWACS-Screamer register space \n");
res = this->screamer->snd_ctrl_read(offset - 0x14000, size);
break;
case 0x16:
case 0x17:
@ -125,10 +128,10 @@ void HeathrowIC::write(uint32_t offset, uint32_t value, int size)
mio_ctrl_write(offset, value, size);
break;
case 8:
LOG_F(9, "Attempting to write to DMA channel register space \n");
LOG_F(WARNING, "Attempting to write to DMA channel register space \n");
break;
case 0x14:
LOG_F(9, "Attempting to write to AWACS-Screamer register space \n");
this->screamer->snd_ctrl_write(offset - 0x14000, value, size);
break;
case 0x16:
case 0x17:

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@ -59,6 +59,7 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
#include "pcihost.h"
#include "viacuda.h"
#include "nvram.h"
#include "awacs.h"
/**
Heathrow ASIC emulation
@ -126,8 +127,9 @@ private:
uint32_t feat_ctrl; // features control register
/* device cells */
ViaCuda *viacuda; /* VIA cell with Cuda MCU attached to it */
NVram *nvram; /* NVRAM cell */
ViaCuda *viacuda; /* VIA cell with Cuda MCU attached to it */
NVram *nvram; /* NVRAM cell */
AWACDevice *screamer; /* Screamer audio codec instance */
};
#endif /* MACIO_H */