mirror of
https://github.com/dingusdev/dingusppc.git
synced 2024-08-31 10:29:40 +00:00
720 lines
25 KiB
C++
720 lines
25 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-22 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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/** High-level VIA-CUDA combo device emulation.
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*/
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#include <core/timermanager.h>
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#include <devices/common/adb/adb.h>
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#include <devices/common/hwinterrupt.h>
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#include <devices/common/viacuda.h>
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#include <devices/deviceregistry.h>
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#include <loguru.hpp>
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#include <machines/machinebase.h>
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#include <memaccess.h>
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#include <cinttypes>
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#include <memory>
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using namespace std;
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ViaCuda::ViaCuda() {
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this->name = "ViaCuda";
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supports_types(HWCompType::ADB_HOST | HWCompType::I2C_HOST);
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// VIA reset clears all internal registers to logic 0
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// except timers/counters and the shift register
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// as stated in the 6522 datasheet
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this->via_regs[VIA_A] = 0;
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this->via_regs[VIA_B] = 0;
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this->via_regs[VIA_DIRB] = 0;
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this->via_regs[VIA_DIRA] = 0;
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this->via_regs[VIA_IER] = 0;
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this->via_regs[VIA_ACR] = 0;
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this->via_regs[VIA_PCR] = 0;
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this->via_regs[VIA_IFR] = 0;
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// load maximum value into the timer registers for safety
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// (not prescribed in the 6522 datasheet)
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this->via_regs[VIA_T1LL] = 0xFF;
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this->via_regs[VIA_T1LH] = 0xFF;
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this->via_regs[VIA_T2CL] = 0xFF;
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this->via_regs[VIA_T2CH] = 0xFF;
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this->_via_ifr = 0; // all flags cleared
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this->_via_ier = 0; // all interrupts disabled
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// intialize counters/timers
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this->t1_counter = 0xFFFF;
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this->t1_active = false;
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this->t2_counter = 0xFFFF;
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this->t2_active = false;
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// calculate VIA clock duration in ns
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this->via_clk_dur = 1.0f / VIA_CLOCK_HZ * NS_PER_SEC;
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// PRAM is part of Cuda
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this->pram_obj = std::unique_ptr<NVram> (new NVram("pram.bin", 256));
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// ADB bus is driven by Cuda
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this->adb_bus = std::unique_ptr<ADB_Bus> (new ADB_Bus());
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this->cuda_init();
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this->int_ctrl = nullptr;
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}
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int ViaCuda::device_postinit()
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{
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this->int_ctrl = dynamic_cast<InterruptCtrl*>(
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gMachineObj->get_comp_by_type(HWCompType::INT_CTRL));
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this->irq_id = this->int_ctrl->register_dev_int(IntSrc::VIA_CUDA);
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return 0;
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}
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void ViaCuda::cuda_init() {
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this->old_tip = 1;
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this->old_byteack = 1;
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this->treq = 1;
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this->in_count = 0;
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this->out_count = 0;
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this->poll_rate = 11;
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}
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uint8_t ViaCuda::read(int reg) {
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/* reading from some VIA registers triggers special actions */
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switch (reg & 0xF) {
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case VIA_B:
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return (this->via_regs[VIA_B]);
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case VIA_A:
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case VIA_ANH:
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LOG_F(WARNING, "Attempted read from VIA Port A!");
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break;
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case VIA_IER:
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return (this->_via_ier | 0x80); // bit 7 always reads as "1"
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case VIA_IFR:
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return this->_via_ifr;
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case VIA_T1CL:
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this->_via_ifr &= ~VIA_IF_T1;
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update_irq();
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return this->calc_counter_val(this->t1_counter, this->t1_start_time) & 0xFFU;
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case VIA_T1CH:
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return this->calc_counter_val(this->t1_counter, this->t1_start_time) >> 8;
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case VIA_T2CL:
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this->_via_ifr &= ~VIA_IF_T2;
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update_irq();
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return this->calc_counter_val(this->t2_counter, this->t2_start_time) & 0xFFU;
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case VIA_T2CH:
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return this->calc_counter_val(this->t2_counter, this->t2_start_time) >> 8;
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case VIA_SR:
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this->_via_ifr &= ~VIA_IF_SR;
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update_irq();
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break;
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}
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return (this->via_regs[reg & 0xF]);
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}
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void ViaCuda::write(int reg, uint8_t value) {
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this->via_regs[reg & 0xF] = value;
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switch (reg & 0xF) {
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case VIA_B:
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write(value);
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break;
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case VIA_A:
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case VIA_ANH:
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LOG_F(WARNING, "Attempted write to VIA Port A!");
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break;
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case VIA_DIRB:
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LOG_F(9, "VIA_DIRB = 0x%X", value);
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break;
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case VIA_DIRA:
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LOG_F(9, "VIA_DIRA = 0x%X", value);
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break;
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case VIA_PCR:
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LOG_F(9, "VIA_PCR = 0x%X", value);
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break;
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case VIA_ACR:
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LOG_F(9, "VIA_ACR = 0x%X", value);
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break;
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case VIA_IFR:
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// for each "1" in value clear the corresponding flags
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this->_via_ifr &= ~value;
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update_irq();
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break;
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case VIA_IER:
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if (value & 0x80) {
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this->_via_ier |= value & 0x7F;
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} else {
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this->_via_ier &= ~value;
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}
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update_irq();
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print_enabled_ints();
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break;
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case VIA_T1CH:
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if (this->via_regs[VIA_ACR] & 0xC0) {
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ABORT_F("Unsupported VIA T1 mode, ACR=0x%X", this->via_regs[VIA_ACR]);
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}
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// cancel active T1 timer task
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if (this->t1_active) {
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TimerManager::get_instance()->cancel_timer(this->t1_timer_id);
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this->t1_active = false;
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}
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// clear T1 flag in IFR
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this->_via_ifr &= ~VIA_IF_T1;
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update_irq();
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// load initial value into counter 1
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this->t1_counter = (value << 8) | this->via_regs[VIA_T1CL];
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// TODO: delay for one phase 2 clock
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// sample current vCPU time and remember it
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this->t1_start_time = TimerManager::get_instance()->current_time_ns();
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// set up timout timer for T1
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this->t1_timer_id = TimerManager::get_instance()->add_oneshot_timer(
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static_cast<uint64_t>(this->via_clk_dur * (this->t1_counter + 3) + 0.5f),
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[this]() {
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this->assert_t1_int();
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}
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);
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this->t1_active = true;
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break;
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case VIA_T2CH:
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if (this->via_regs[VIA_ACR] & 0x20) {
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ABORT_F("VIA T2 pulse count mode not supported!");
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}
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// cancel active T2 timer task
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if (this->t2_active) {
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TimerManager::get_instance()->cancel_timer(this->t2_timer_id);
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this->t2_active = false;
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}
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// clear T2 flag in IFR
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this->_via_ifr &= ~VIA_IF_T2;
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update_irq();
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// load initial value into counter 2
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this->t2_counter = (value << 8) | this->via_regs[VIA_T2CL];
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// TODO: delay for one phase 2 clock
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// sample current vCPU time and remember it
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this->t2_start_time = TimerManager::get_instance()->current_time_ns();
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// set up timeout timer for T2
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this->t2_timer_id = TimerManager::get_instance()->add_oneshot_timer(
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static_cast<uint64_t>(this->via_clk_dur * (this->t2_counter + 3) + 0.5f),
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[this]() {
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this->assert_t2_int();
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}
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);
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this->t2_active = true;
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break;
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case VIA_SR:
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this->_via_ifr &= ~VIA_IF_SR;
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update_irq();
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break;
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}
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}
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uint16_t ViaCuda::calc_counter_val(const uint16_t last_val, const uint64_t& last_time)
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{
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// calcualte current counter value based on elapsed time and timer frequency
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uint64_t cur_time = TimerManager::get_instance()->current_time_ns();
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uint32_t diff = (cur_time - last_time) / this->via_clk_dur;
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return last_val - diff;
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}
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void ViaCuda::print_enabled_ints() {
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const char* via_int_src[] = {"CA2", "CA1", "SR", "CB2", "CB1", "T2", "T1"};
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for (int i = 0; i < 7; i++) {
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if (this->_via_ier & (1 << i))
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LOG_F(INFO, "VIA %s interrupt enabled", via_int_src[i]);
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}
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}
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void ViaCuda::update_irq()
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{
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uint8_t active_ints = this->_via_ifr & this->_via_ier & 0x7F;
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if (active_ints != this->old_ifr) {
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uint8_t new_irq = !!active_ints;
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this->_via_ifr = (active_ints) | (new_irq << 7);
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this->old_ifr = active_ints;
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LOG_F(6, "VIA: assert IRQ, IFR=0x%02X", this->_via_ifr);
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this->int_ctrl->ack_int(this->irq_id, new_irq);
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}
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}
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void ViaCuda::assert_sr_int() {
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this->sr_timer_on = false;
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this->_via_ifr |= VIA_IF_SR;
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update_irq();
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}
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void ViaCuda::assert_t1_int() {
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this->_via_ifr |= VIA_IF_T1;
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this->t1_active = false;
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update_irq();
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}
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void ViaCuda::assert_t2_int() {
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this->_via_ifr |= VIA_IF_T2;
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this->t2_active = false;
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update_irq();
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}
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#ifdef DEBUG_CPU_INT
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void ViaCuda::assert_int(uint8_t flags) {
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this->_via_ifr |= (flags & 0x7F);
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update_irq();
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}
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#endif
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void ViaCuda::assert_ctrl_line(ViaLine line)
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{
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switch (line) {
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case ViaLine::CA1:
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this->_via_ifr |= VIA_IF_CA1;
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break;
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case ViaLine::CA2:
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this->_via_ifr |= VIA_IF_CA2;
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break;
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case ViaLine::CB1:
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this->_via_ifr |= VIA_IF_CB1;
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break;
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case ViaLine::CB2:
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this->_via_ifr |= VIA_IF_CB1;
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break;
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default:
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ABORT_F("Assertion of unknown VIA line requested!");
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}
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update_irq();
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}
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void ViaCuda::schedule_sr_int(uint64_t timeout_ns) {
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if (this->sr_timer_on) {
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TimerManager::get_instance()->cancel_timer(this->sr_timer_id);
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this->sr_timer_on = false;
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}
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this->sr_timer_id = TimerManager::get_instance()->add_oneshot_timer(
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timeout_ns,
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[this]() { this->assert_sr_int(); });
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this->sr_timer_on = true;
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}
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void ViaCuda::write(uint8_t new_state) {
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int new_tip = !!(new_state & CUDA_TIP);
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int new_byteack = !!(new_state & CUDA_BYTEACK);
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/* return if there is no state change */
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if (new_tip == this->old_tip && new_byteack == this->old_byteack)
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return;
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LOG_F(9, "Cuda state changed!");
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this->old_tip = new_tip;
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this->old_byteack = new_byteack;
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if (new_tip) {
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if (new_byteack) {
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this->via_regs[VIA_B] |= CUDA_TREQ; /* negate TREQ */
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this->treq = 1;
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if (this->in_count) {
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process_packet();
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/* start response transaction */
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TimerManager::get_instance()->add_oneshot_timer(
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USECS_TO_NSECS(13), // delay TREQ assertion for New World
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[this]() {
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this->via_regs[VIA_B] &= ~CUDA_TREQ; // assert TREQ
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this->treq = 0;
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});
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}
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this->in_count = 0;
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} else {
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LOG_F(9, "Cuda: enter sync state");
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this->via_regs[VIA_B] &= ~CUDA_TREQ; /* assert TREQ */
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this->treq = 0;
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this->in_count = 0;
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this->out_count = 0;
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}
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// send dummy byte as idle acknowledge or attention
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schedule_sr_int(USECS_TO_NSECS(61));
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} else {
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if (this->via_regs[VIA_ACR] & 0x10) { /* data transfer: Host --> Cuda */
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if (this->in_count < sizeof(this->in_buf)) {
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this->in_buf[this->in_count++] = this->via_regs[VIA_SR];
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// tell the system we've read the byte after 71 usecs
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schedule_sr_int(USECS_TO_NSECS(71));
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} else {
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LOG_F(WARNING, "Cuda input buffer too small. Truncating data!");
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}
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} else { /* data transfer: Cuda --> Host */
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(this->*out_handler)();
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// tell the system we've written next byte after 88 usecs
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schedule_sr_int(USECS_TO_NSECS(88));
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}
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}
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}
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/* sends zeros to host ad infinitum */
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void ViaCuda::null_out_handler() {
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this->via_regs[VIA_SR] = 0;
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}
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/* sends PRAM content to host ad infinitum */
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void ViaCuda::pram_out_handler()
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{
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this->via_regs[VIA_SR] = this->pram_obj->read_byte(this->cur_pram_addr++);
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}
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/* sends data from out_buf until exhausted, then switches to next_out_handler */
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void ViaCuda::out_buf_handler() {
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if (this->out_pos < this->out_count) {
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LOG_F(9, "OutBufHandler: sending next byte 0x%X", this->out_buf[this->out_pos]);
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this->via_regs[VIA_SR] = this->out_buf[this->out_pos++];
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} else if (this->is_open_ended) {
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LOG_F(9, "OutBufHandler: switching to next handler");
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this->out_handler = this->next_out_handler;
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this->next_out_handler = &ViaCuda::null_out_handler;
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(this->*out_handler)();
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} else {
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LOG_F(9, "Sending last byte");
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this->out_count = 0;
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this->via_regs[VIA_B] |= CUDA_TREQ; /* negate TREQ */
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this->treq = 1;
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}
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}
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void ViaCuda::response_header(uint32_t pkt_type, uint32_t pkt_flag) {
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this->out_buf[0] = pkt_type;
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this->out_buf[1] = pkt_flag;
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this->out_buf[2] = this->in_buf[1]; /* copy original cmd */
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this->out_count = 3;
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this->out_pos = 0;
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this->out_handler = &ViaCuda::out_buf_handler;
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this->next_out_handler = &ViaCuda::null_out_handler;
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this->is_open_ended = false;
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}
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void ViaCuda::error_response(uint32_t error) {
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this->out_buf[0] = CUDA_PKT_ERROR;
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this->out_buf[1] = error;
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this->out_buf[2] = this->in_buf[0];
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this->out_buf[3] = this->in_buf[1]; /* copy original cmd */
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this->out_count = 4;
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this->out_pos = 0;
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this->out_handler = &ViaCuda::out_buf_handler;
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this->next_out_handler = &ViaCuda::null_out_handler;
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this->is_open_ended = false;
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}
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void ViaCuda::process_packet() {
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if (this->in_count < 2) {
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LOG_F(ERROR, "Cuda: invalid packet (too few data)!");
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error_response(CUDA_ERR_BAD_SIZE);
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return;
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}
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switch (this->in_buf[0]) {
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case CUDA_PKT_ADB:
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LOG_F(9, "Cuda: ADB packet received");
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process_adb_command(this->in_buf[1], this->in_count - 2);
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break;
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case CUDA_PKT_PSEUDO:
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LOG_F(9, "Cuda: pseudo command packet received");
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LOG_F(9, "Command: 0x%X", this->in_buf[1]);
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LOG_F(9, "Data count: %d", this->in_count);
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for (int i = 0; i < this->in_count; i++) {
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LOG_F(9, "0x%X ,", this->in_buf[i]);
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}
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pseudo_command(this->in_buf[1], this->in_count - 2);
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break;
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default:
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LOG_F(ERROR, "Cuda: unsupported packet type = %d", this->in_buf[0]);
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error_response(CUDA_ERR_BAD_PKT);
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}
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}
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void ViaCuda::process_adb_command(uint8_t cmd_byte, int data_count) {
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int adb_dev = cmd_byte >> 4; // 2 for keyboard, 3 for mouse
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int cmd = cmd_byte & 0xF;
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if (!cmd) {
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LOG_F(9, "Cuda: ADB SendReset command requested");
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response_header(CUDA_PKT_ADB, 0);
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} else if (cmd == 1) {
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LOG_F(9, "Cuda: ADB Flush command requested");
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response_header(CUDA_PKT_ADB, 0);
|
|
} else if ((cmd & 0xC) == 8) {
|
|
LOG_F(9, "Cuda: ADB Listen command requested");
|
|
int adb_reg = cmd_byte & 0x3;
|
|
if (adb_bus->listen(adb_dev, adb_reg)) {
|
|
response_header(CUDA_PKT_ADB, 0);
|
|
for (int data_ptr = 0; data_ptr < adb_bus->get_output_len(); data_ptr++) {
|
|
this->in_buf[(2 + data_ptr)] = adb_bus->get_output_byte(data_ptr);
|
|
}
|
|
} else {
|
|
response_header(CUDA_PKT_ADB, 2);
|
|
}
|
|
} else if ((cmd & 0xC) == 0xC) {
|
|
LOG_F(9, "Cuda: ADB Talk command requested");
|
|
response_header(CUDA_PKT_ADB, 0);
|
|
int adb_reg = cmd_byte & 0x3;
|
|
if (adb_bus->talk(adb_dev, adb_reg, this->in_buf[2])) {
|
|
response_header(CUDA_PKT_ADB, 0);
|
|
} else {
|
|
response_header(CUDA_PKT_ADB, 2);
|
|
}
|
|
} else {
|
|
LOG_F(ERROR, "Cuda: unsupported ADB command 0x%X", cmd);
|
|
error_response(CUDA_ERR_BAD_CMD);
|
|
}
|
|
}
|
|
|
|
void ViaCuda::pseudo_command(int cmd, int data_count) {
|
|
uint16_t addr;
|
|
int i;
|
|
|
|
switch (cmd) {
|
|
case CUDA_START_STOP_AUTOPOLL:
|
|
if (this->in_buf[2]) {
|
|
LOG_F(INFO, "Cuda: autopoll started, rate: %d ms", this->poll_rate);
|
|
} else {
|
|
LOG_F(INFO, "Cuda: autopoll stopped");
|
|
}
|
|
response_header(CUDA_PKT_PSEUDO, 0);
|
|
break;
|
|
case CUDA_READ_MCU_MEM:
|
|
addr = READ_WORD_BE_A(&this->in_buf[2]);
|
|
response_header(CUDA_PKT_PSEUDO, 0);
|
|
// if starting address is within PRAM region
|
|
// prepare to transfer PRAM content, othwesise we will send zeroes
|
|
if (addr >= CUDA_PRAM_START && addr <= CUDA_PRAM_END) {
|
|
this->cur_pram_addr = addr - CUDA_PRAM_START;
|
|
this->next_out_handler = &ViaCuda::pram_out_handler;
|
|
} else if (addr >= CUDA_ROM_START) {
|
|
// HACK: Cuda ROM dump requsted so let's partially fake it
|
|
this->out_buf[3] = 0; // empty copyright string
|
|
WRITE_WORD_BE_A(&this->out_buf[4], 0x0019U);
|
|
WRITE_WORD_BE_A(&this->out_buf[6], CUDA_FW_VERSION_MAJOR);
|
|
WRITE_WORD_BE_A(&this->out_buf[8], CUDA_FW_VERSION_MINOR);
|
|
this->out_count += 7;
|
|
}
|
|
this->is_open_ended = true;
|
|
break;
|
|
case CUDA_GET_REAL_TIME:
|
|
response_header(CUDA_PKT_PSEUDO, 0);
|
|
this->out_buf[2] = (uint8_t)((this->real_time >> 24) & 0xFF);
|
|
this->out_buf[3] = (uint8_t)((this->real_time >> 16) & 0xFF);
|
|
this->out_buf[4] = (uint8_t)((this->real_time >> 8) & 0xFF);
|
|
this->out_buf[5] = (uint8_t)((this->real_time) & 0xFF);
|
|
break;
|
|
case CUDA_WRITE_MCU_MEM:
|
|
addr = READ_WORD_BE_A(&this->in_buf[2]);
|
|
// if addr is inside PRAM, update PRAM with data from in_buf
|
|
// otherwise, ignore data in in_buf
|
|
if (addr >= CUDA_PRAM_START && addr <= CUDA_PRAM_END) {
|
|
for (i = 0; i < this->in_count - 4; i++) {
|
|
this->pram_obj->write_byte((addr - CUDA_PRAM_START + i) & 0xFF,
|
|
this->in_buf[4+i]);
|
|
}
|
|
}
|
|
response_header(CUDA_PKT_PSEUDO, 0);
|
|
break;
|
|
case CUDA_READ_PRAM:
|
|
addr = READ_WORD_BE_A(&this->in_buf[2]);
|
|
if (addr <= 0xFF) {
|
|
response_header(CUDA_PKT_PSEUDO, 0);
|
|
// this command is open-ended so set up the corresponding context
|
|
this->cur_pram_addr = addr;
|
|
this->next_out_handler = &ViaCuda::pram_out_handler;
|
|
this->is_open_ended = true;
|
|
} else {
|
|
error_response(CUDA_ERR_BAD_PAR);
|
|
}
|
|
break;
|
|
case CUDA_SET_REAL_TIME:
|
|
response_header(CUDA_PKT_PSEUDO, 0);
|
|
this->real_time = ((uint32_t)in_buf[2]) >> 24;
|
|
this->real_time += ((uint32_t)in_buf[3]) >> 16;
|
|
this->real_time += ((uint32_t)in_buf[4]) >> 8;
|
|
this->real_time += ((uint32_t)in_buf[5]);
|
|
break;
|
|
case CUDA_WRITE_PRAM:
|
|
addr = READ_WORD_BE_A(&this->in_buf[2]);
|
|
if (addr <= 0xFF) {
|
|
// transfer data from in_buf to PRAM
|
|
for (i = 0; i < this->in_count - 4; i++) {
|
|
this->pram_obj->write_byte((addr + i) & 0xFF, this->in_buf[4+i]);
|
|
}
|
|
response_header(CUDA_PKT_PSEUDO, 0);
|
|
} else {
|
|
error_response(CUDA_ERR_BAD_PAR);
|
|
}
|
|
break;
|
|
case CUDA_FILE_SERVER_FLAG:
|
|
response_header(CUDA_PKT_PSEUDO, 0);
|
|
if (this->in_buf[2]) {
|
|
LOG_F(INFO, "Cuda: File server flag on");
|
|
this->file_server = true;
|
|
} else {
|
|
LOG_F(INFO, "Cuda: File server flag off");
|
|
this->file_server = false;
|
|
}
|
|
break;
|
|
case CUDA_SET_AUTOPOLL_RATE:
|
|
this->poll_rate = this->in_buf[2];
|
|
LOG_F(INFO, "Cuda: autopoll rate set to %d ms", this->poll_rate);
|
|
response_header(CUDA_PKT_PSEUDO, 0);
|
|
break;
|
|
case CUDA_GET_AUTOPOLL_RATE:
|
|
response_header(CUDA_PKT_PSEUDO, 0);
|
|
this->out_buf[3] = this->poll_rate;
|
|
this->out_count++;
|
|
break;
|
|
case CUDA_SET_DEVICE_LIST:
|
|
response_header(CUDA_PKT_PSEUDO, 0);
|
|
this->device_mask = ((uint16_t)in_buf[2]) >> 8;
|
|
this->device_mask += ((uint16_t)in_buf[3]);
|
|
break;
|
|
case CUDA_GET_DEVICE_LIST:
|
|
response_header(CUDA_PKT_PSEUDO, 0);
|
|
this->out_buf[2] = (uint8_t)((this->device_mask >> 8) & 0xFF);
|
|
this->out_buf[3] = (uint8_t)((this->device_mask) & 0xFF);
|
|
break;
|
|
case CUDA_ONE_SECOND_MODE:
|
|
LOG_F(INFO, "Cuda: One Second Interrupt - Byte Sent: %d", this->in_buf[2]);
|
|
response_header(CUDA_PKT_PSEUDO, 0);
|
|
break;
|
|
case CUDA_READ_WRITE_I2C:
|
|
response_header(CUDA_PKT_PSEUDO, 0);
|
|
i2c_simple_transaction(this->in_buf[2], &this->in_buf[3], this->in_count - 3);
|
|
break;
|
|
case CUDA_COMB_FMT_I2C:
|
|
response_header(CUDA_PKT_PSEUDO, 0);
|
|
if (this->in_count >= 5) {
|
|
i2c_comb_transaction(
|
|
this->in_buf[2], this->in_buf[3], this->in_buf[4], &this->in_buf[5], this->in_count - 5);
|
|
}
|
|
break;
|
|
case CUDA_OUT_PB0: /* undocumented call! */
|
|
LOG_F(INFO, "Cuda: send %d to PB0", (int)(this->in_buf[2]));
|
|
response_header(CUDA_PKT_PSEUDO, 0);
|
|
break;
|
|
case CUDA_WARM_START:
|
|
case CUDA_POWER_DOWN:
|
|
case CUDA_MONO_STABLE_RESET:
|
|
case CUDA_RESTART_SYSTEM:
|
|
/* really kludge temp code */
|
|
LOG_F(INFO, "Cuda: Restart/Shutdown signal sent with command 0x%x!", cmd);
|
|
//exit(0);
|
|
break;
|
|
default:
|
|
LOG_F(ERROR, "Cuda: unsupported pseudo command 0x%X", cmd);
|
|
error_response(CUDA_ERR_BAD_CMD);
|
|
}
|
|
}
|
|
|
|
/* sends data from the current I2C to host ad infinitum */
|
|
void ViaCuda::i2c_handler() {
|
|
this->receive_byte(this->curr_i2c_addr, &this->via_regs[VIA_SR]);
|
|
}
|
|
|
|
void ViaCuda::i2c_simple_transaction(uint8_t dev_addr, const uint8_t* in_buf, int in_bytes) {
|
|
int op_type = dev_addr & 1; /* 0 - write to device, 1 - read from device */
|
|
|
|
dev_addr >>= 1; /* strip RD/WR bit */
|
|
|
|
if (!this->start_transaction(dev_addr)) {
|
|
LOG_F(WARNING, "Unsupported I2C device 0x%X", dev_addr);
|
|
error_response(CUDA_ERR_I2C);
|
|
return;
|
|
}
|
|
|
|
/* send data to the target I2C device until there is no more data to send
|
|
or the target device doesn't acknowledge that indicates an error */
|
|
for (int i = 0; i < in_bytes; i++) {
|
|
if (!this->send_byte(dev_addr, in_buf[i])) {
|
|
LOG_F(WARNING, "NO_ACK during sending, device 0x%X", dev_addr);
|
|
error_response(CUDA_ERR_I2C);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (op_type) { /* read request initiate an open ended transaction */
|
|
this->curr_i2c_addr = dev_addr;
|
|
this->out_handler = &ViaCuda::out_buf_handler;
|
|
this->next_out_handler = &ViaCuda::i2c_handler;
|
|
this->is_open_ended = true;
|
|
}
|
|
}
|
|
|
|
void ViaCuda::i2c_comb_transaction(
|
|
uint8_t dev_addr, uint8_t sub_addr, uint8_t dev_addr1, const uint8_t* in_buf, int in_bytes) {
|
|
int op_type = dev_addr1 & 1; /* 0 - write to device, 1 - read from device */
|
|
|
|
if ((dev_addr & 0xFE) != (dev_addr1 & 0xFE)) {
|
|
LOG_F(ERROR, "Combined I2C: dev_addr mismatch!");
|
|
error_response(CUDA_ERR_I2C);
|
|
return;
|
|
}
|
|
|
|
dev_addr >>= 1; /* strip RD/WR bit */
|
|
|
|
if (!this->start_transaction(dev_addr)) {
|
|
LOG_F(WARNING, "Unsupported I2C device 0x%X", dev_addr);
|
|
error_response(CUDA_ERR_I2C);
|
|
return;
|
|
}
|
|
|
|
if (!this->send_subaddress(dev_addr, sub_addr)) {
|
|
LOG_F(WARNING, "NO_ACK while sending subaddress, device 0x%X", dev_addr);
|
|
error_response(CUDA_ERR_I2C);
|
|
return;
|
|
}
|
|
|
|
/* send data to the target I2C device until there is no more data to send
|
|
or the target device doesn't acknowledge that indicates an error */
|
|
for (int i = 0; i < in_bytes; i++) {
|
|
if (!this->send_byte(dev_addr, in_buf[i])) {
|
|
LOG_F(WARNING, "NO_ACK during sending, device 0x%X", dev_addr);
|
|
error_response(CUDA_ERR_I2C);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (!op_type) { /* return dummy response for writes */
|
|
LOG_F(WARNING, "Combined I2C - write request!");
|
|
} else {
|
|
this->curr_i2c_addr = dev_addr;
|
|
this->out_handler = &ViaCuda::out_buf_handler;
|
|
this->next_out_handler = &ViaCuda::i2c_handler;
|
|
this->is_open_ended = true;
|
|
}
|
|
}
|
|
|
|
static const DeviceDescription ViaCuda_Descriptor = {
|
|
ViaCuda::create, {}, {}
|
|
};
|
|
|
|
REGISTER_DEVICE(ViaCuda, ViaCuda_Descriptor);
|