HackRF-Treasure-Chest/Software/portapack-mayhem/firmware/baseband/gpdma_lli.hpp

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2022-09-22 18:26:57 +02:00
/*
* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
*
* This file is part of PortaPack.
*
* 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 2, 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; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include <cstdint>
#include <cstddef>
#include <vector>
#include <memory>
#include "gpdma.hpp"
namespace lpc43xx {
namespace gpdma {
namespace lli {
enum class ChainType : uint8_t {
Loop = 0,
OneShot = 1,
};
enum class Interrupt : uint8_t {
All = 0,
Last = 1,
};
struct ChainConfig {
ChainType type;
size_t length;
Interrupt interrupt;
};
enum class BurstSize : uint8_t {
Transfer1 = 0,
Transfer4 = 1,
Transfer8 = 2,
Transfer16 = 3,
Transfer32 = 4,
Transfer64 = 5,
Transfer128 = 6,
Transfer256 = 7,
};
enum class TransferWidth : uint8_t {
Byte = 0,
HalfWord = 1,
Word = 2,
};
enum class Increment : uint8_t {
No = 0,
Yes = 1,
};
using PeripheralIndex = uint8_t;
struct Endpoint {
PeripheralIndex peripheral;
BurstSize burst_size;
TransferWidth transfer_size;
Increment increment;
};
struct ChannelConfig {
ChainConfig chain;
FlowControl flow_control;
Endpoint source;
Endpoint destination;
constexpr gpdma::channel::Control control(
const size_t transfer_size,
const bool last
) {
return {
.transfersize = transfer_size,
.sbsize = toUType(source.burst_size),
.dbsize = toUType(destination.burst_size),
.swidth = toUType(source.transfer_size),
.dwidth = toUType(destination.transfer_size),
.s = source_endpoint_type(flow_control),
.d = destination_endpoint_type(flow_control),
.si = toUType(source.increment),
.di = toUType(destination.increment),
.prot1 = 0,
.prot2 = 0,
.prot3 = 0,
.i = ((chain.interrupt == Interrupt::All) || last) ? 1U : 0U,
};
}
constexpr gpdma::channel::Config config() {
return {
.e = 0,
.srcperipheral = source.peripheral,
.destperipheral = destination.peripheral,
.flowcntrl = flow_control,
.ie = 1,
.itc = 1,
.l = 0,
.a = 0,
.h = 0,
};
};
};
constexpr ChannelConfig channel_config_baseband_tx {
{ ChainType::Loop, 4, Interrupt::All },
gpdma::FlowControl::MemoryToPeripheral_DMAControl,
{ 0x00, BurstSize::Transfer1, TransferWidth::Word, Increment::Yes },
{ 0x00, BurstSize::Transfer1, TransferWidth::Word, Increment::No },
};
constexpr ChannelConfig channel_config_baseband_rx {
{ ChainType::Loop, 4, Interrupt::All },
gpdma::FlowControl::PeripheralToMemory_DMAControl,
{ 0x00, BurstSize::Transfer1, TransferWidth::Word, Increment::No },
{ 0x00, BurstSize::Transfer1, TransferWidth::Word, Increment::Yes },
};
constexpr ChannelConfig channel_config_audio_tx {
{ ChainType::Loop, 4, Interrupt::All },
gpdma::FlowControl::MemoryToPeripheral_DMAControl,
{ 0x0a, BurstSize::Transfer32, TransferWidth::Word, Increment::Yes },
{ 0x0a, BurstSize::Transfer32, TransferWidth::Word, Increment::No },
};
constexpr ChannelConfig channel_config_audio_rx {
{ ChainType::Loop, 4, Interrupt::All },
gpdma::FlowControl::PeripheralToMemory_DMAControl,
{ 0x09, BurstSize::Transfer32, TransferWidth::Word, Increment::No },
{ 0x09, BurstSize::Transfer32, TransferWidth::Word, Increment::Yes },
};
constexpr ChannelConfig channel_config_rssi {
{ ChainType::Loop, 4, Interrupt::All },
gpdma::FlowControl::PeripheralToMemory_DMAControl,
{ 0x0e, BurstSize::Transfer1, TransferWidth::Byte, Increment::No },
{ 0x0e, BurstSize::Transfer1, TransferWidth::Word, Increment::Yes },
};
class Chain {
public:
using chain_t = std::vector<gpdma::channel::LLI>;
using chain_p = std::unique_ptr<chain_t>;
Chain(const ChannelConfig& cc) :
chain(std::make_unique<chain_t>(cc.chain.length))
{
set_lli_sequential(cc.chain_type);
set_source_address()...
}
private:
chain_p chain;
void set_source_peripheral(void* const address) {
set_source_address(address, 0);
}
void set_destination_peripheral(void* const address) {
set_destination_address(address, 0);
}
void set_source_address(void* const address, const size_t increment) {
size_t offset = 0;
for(auto& item : *chain) {
item.srcaddr = (uint32_t)address + offset;
offset += increment;
}
}
void set_destination_address(void* const address, const size_t increment) {
size_t offset = 0;
for(auto& item : *chain) {
item.destaddr = (uint32_t)address + offset;
offset += increment;
}
}
void set_control(const gpdma::channel::Control control) {
for(auto& item : *chain) {
item.control = control;
}
}
void set_lli_sequential(ChainType chain_type) {
for(auto& item : *chain) {
item.lli = lli_pointer(&item + 1);
}
if( chain_type == ChainType::Loop ) {
chain[chain->size() - 1].lli = lli_pointer(&chain[0]);
} else {
chain[chain->size() - 1].lli = lli_pointer(nullptr);
}
}
gpdma::channel::LLIPointer lli_pointer(const void* lli) {
return {
.lm = 0,
.r = 0,
.lli = reinterpret_cast<uint32_t>(lli),
};
}
};
} /* namespace lli */
} /* namespace gpdma */
} /* namespace lpc43xx */