mirror of
https://github.com/dingusdev/dingusppc.git
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183 lines
5.1 KiB
C++
183 lines
5.1 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-23 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/** AWAC sound devices family definitions.
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Audio Waveform Amplifier and Converters (AWACs) is a family of custom audio
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chips used in Power Macintosh.
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*/
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#ifndef AWAC_H
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#define AWAC_H
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#include <devices/common/hwcomponent.h>
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#include <devices/common/i2c/i2c.h>
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#include <cinttypes>
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#include <memory>
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#include <string>
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class DmaOutChannel;
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class SoundServer;
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/** Base class for the AWACs codecs. */
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class AwacsBase : public HWComponent {
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public:
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AwacsBase(std::string name);
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~AwacsBase() = default;
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void set_dma_out(DmaOutChannel *dma_out_ch) {
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this->dma_out_ch = dma_out_ch;
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};
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void set_sample_rate(int sr_id);
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void dma_out_start();
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void dma_out_stop();
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void dma_out_pause();
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protected:
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SoundServer *snd_server; // SoundServer instance pointer
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DmaOutChannel *dma_out_ch; // DMA output channel instance pointer
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int *sr_table; // pointer to the table of supported sample rates
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int max_sr_id; // maximum value for sample rate ID
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bool out_stream_ready = false;
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bool out_stream_running = false;
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int cur_sample_rate = -1;
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int out_sample_rate = -1;
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};
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/** AWACs PDM-style sound codec. */
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class AwacDevicePdm : public AwacsBase {
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public:
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AwacDevicePdm();
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~AwacDevicePdm() = default;
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uint32_t read_stat(void);
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void write_ctrl(uint32_t addr, uint16_t value);
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private:
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uint16_t ctrl_regs[5] = {}; // 12-bit wide control registers
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};
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/** Offsets to MacIO sound codec registers. */
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enum {
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AWAC_SOUND_CTRL_REG = 0x00,
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AWAC_CODEC_CTRL_REG = 0x10,
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AWAC_CODEC_STATUS_REG = 0x20,
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};
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/** Apple source calls this kValidData but doesn't explain
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what it actually means. It seems like it's used to check
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if the sound codec is available.
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*/
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#define AWAC_AVAILABLE 0x40
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/** Audio processor chip (TDA7433) emulation. */
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class AudioProcessor : public I2CDevice {
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public:
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AudioProcessor() = default;
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~AudioProcessor() = default;
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void start_transaction() {
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this->pos = 0;
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};
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bool send_subaddress(uint8_t sub_addr) {
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if ((sub_addr & 0xF) > 6)
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return false; // invalid subaddress -> no acknowledge
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this->sub_addr = sub_addr & 0xF;
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this->auto_inc = !!(sub_addr & 0x10);
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LOG_F(9, "TDA7433 subaddress = 0x%X, auto increment = %d",
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this->sub_addr, this->auto_inc);
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this->pos++;
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return true;
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};
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bool send_byte(uint8_t data) {
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if (!this->pos) {
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return send_subaddress(data);
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} else if (this->sub_addr <= 6) {
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LOG_F(9, "TDA7433 byte 0x%X received", data);
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this->regs[this->sub_addr] = data;
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if (this->auto_inc) {
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this->sub_addr++;
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}
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return true;
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} else {
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return false; // invalid sub_addr -> no acknowledge
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}
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};
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bool receive_byte(uint8_t* p_data) {
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*p_data = this->regs[this->sub_addr];
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LOG_F(9, "TDA7433 byte 0x%X sent", *p_data);
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return true;
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};
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private:
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uint8_t regs[7] = {}; // control registers, see TDA7433 datasheet
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uint8_t sub_addr;
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int pos;
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int auto_inc;
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};
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/** Sound codec interface with the typical MacIO access. */
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class MacioSndCodec : public AwacsBase {
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public:
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MacioSndCodec(std::string name) : AwacsBase(name) {};
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virtual uint32_t snd_ctrl_read(uint32_t offset, int size) = 0;
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virtual void snd_ctrl_write(uint32_t offset, uint32_t value, int size) = 0;
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};
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/** AWACs manufacturers and revisions. */
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#define AWAC_MAKER_CRYSTAL 1
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#define AWAC_REV_AWACS 2
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#define AWAC_REV_SCREAMER 3
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/** Screamer sound codec. */
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class AwacsScreamer : public MacioSndCodec {
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public:
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AwacsScreamer(std::string name = "Screamer");
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~AwacsScreamer() = default;
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uint32_t snd_ctrl_read(uint32_t offset, int size);
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void snd_ctrl_write(uint32_t offset, uint32_t value, int size);
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int device_postinit();
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static std::unique_ptr<HWComponent> create() {
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return std::unique_ptr<AwacsScreamer>(new AwacsScreamer("Screamer"));
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}
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private:
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uint32_t snd_ctrl_reg = 0;
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uint16_t control_regs[8] = {}; // control registers, each 12-bits wide
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uint8_t is_busy = 0;
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std::unique_ptr<AudioProcessor> audio_proc;
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};
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#endif /* AWAC_H */
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