1 files changed, 0 insertions, 140 deletions
diff --git a/src/drivers/gpio_expander.cpp b/src/drivers/gpio_expander.cpp
deleted file mode 100644
index 5a9bb83e..00000000
--- a/src/drivers/gpio_expander.cpp
+++ /dev/null
@@ -1,140 +0,0 @@
-/*
- * Copyright 2023 jacqueline <me@jacqueline.id.au>
- *
- * SPDX-License-Identifier: GPL-3.0-only
- */
-
-#include "gpio_expander.hpp"
-#include <stdint.h>
-
-#include <cstdint>
-
-#include "driver/gpio.h"
-#include "hal/gpio_types.h"
-#include "i2c.hpp"
-
-namespace drivers {
-
-static const uint8_t kPca8575Address = 0x20;
-
-// Port A:
-// 0 - sd card mux switch
-// 1 - sd card mux enable (active low)
-// 2 - key up
-// 3 - key down
-// 4 - key lock
-// 5 - display reset (active low)
-// 6 - NC
-// 7 - sd card power (active low)
-// Default to SD card off, inputs high.
-static const uint8_t kPortADefault = 0b10111110;
-
-// Port B:
-// 0 - 3.5mm jack detect (active low)
-// 1 - headphone amp power enable
-// 2 - volume zero-cross detection
-// 3 - volume direction
-// 4 - volume left channel
-// 5 - volume right channel
-// 6 - NC
-// 7 - NC
-// Default input high, trs output low
-static const uint8_t kPortBDefault = 0b00000011;
-
-/*
- * Convenience mehod for packing the port a and b bytes into a single 16 bit
- * value.
- */
-constexpr uint16_t pack(uint8_t a, uint8_t b) {
-  return ((uint16_t)b) << 8 | a;
-}
-
-/*
- * Convenience mehod for unpacking the result of `pack` back into two single
- * byte port datas.
- */
-constexpr std::pair<uint8_t, uint8_t> unpack(uint16_t ba) {
-  return std::pair((uint8_t)ba, (uint8_t)(ba >> 8));
-}
-
-void interrupt_isr(void* arg) {
-  GpioExpander* instance = reinterpret_cast<GpioExpander*>(arg);
-  auto listener = instance->listener().lock();
-  if (listener) {
-    std::invoke(*listener);
-  }
-}
-
-auto GpioExpander::Create() -> GpioExpander* {
-  GpioExpander* instance = new GpioExpander();
-  // Read and write initial values on initialisation so that we do not have a
-  // strange partially-initialised state.
-  if (!instance->Write() || !instance->Read()) {
-    return nullptr;
-  }
-  return instance;
-}
-
-GpioExpander::GpioExpander()
-    : ports_(pack(kPortADefault, kPortBDefault)), inputs_(0), listener_() {
-  gpio_config_t config{
-      .pin_bit_mask = static_cast<uint64_t>(1) << GPIO_NUM_34,
-      .mode = GPIO_MODE_INPUT,
-      .pull_up_en = GPIO_PULLUP_ENABLE,
-      .pull_down_en = GPIO_PULLDOWN_DISABLE,
-      .intr_type = GPIO_INTR_NEGEDGE,
-  };
-  gpio_config(&config);
-  gpio_install_isr_service(ESP_INTR_FLAG_LOWMED | ESP_INTR_FLAG_SHARED |
-                           ESP_INTR_FLAG_IRAM);
-  gpio_isr_handler_add(GPIO_NUM_34, &interrupt_isr, this);
-}
-
-GpioExpander::~GpioExpander() {
-  gpio_isr_handler_remove(GPIO_NUM_34);
-  gpio_uninstall_isr_service();
-}
-
-bool GpioExpander::Write() {
-  std::pair<uint8_t, uint8_t> ports_ab = unpack(ports());
-
-  I2CTransaction transaction;
-  transaction.start()
-      .write_addr(kPca8575Address, I2C_MASTER_WRITE)
-      .write_ack(ports_ab.first, ports_ab.second)
-      .stop();
-
-  return transaction.Execute() == ESP_OK;
-}
-
-bool GpioExpander::Read() {
-  uint8_t input_a, input_b;
-
-  I2CTransaction transaction;
-  transaction.start()
-      .write_addr(kPca8575Address, I2C_MASTER_READ)
-      .read(&input_a, I2C_MASTER_ACK)
-      .read(&input_b, I2C_MASTER_LAST_NACK)
-      .stop();
-
-  esp_err_t ret = transaction.Execute();
-  if (ret != ESP_OK) {
-    return false;
-  }
-  inputs_ = pack(input_a, input_b);
-  return true;
-}
-
-void GpioExpander::set_pin(Pin pin, bool value) {
-  if (value) {
-    ports_ |= (1 << pin);
-  } else {
-    ports_ &= ~(1 << pin);
-  }
-}
-
-bool GpioExpander::get_input(Pin pin) const {
-  return (inputs_ & (1 << pin)) > 0;
-}
-
-}  // namespace drivers