Ken Van Hoeylandt
109 lines
3.5 KiB
C++
109 lines
3.5 KiB
C++
#include <tactility/module.h>
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#include <tactility/check.h>
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#include <tactility/device.h>
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#include <tactility/device_listener.h>
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#include <tactility/driver.h>
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#include <tactility/drivers/gpio.h>
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#include <tactility/drivers/gpio_controller.h>
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#include <tactility/log.h>
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#include <cstring>
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#include "devices/detect.h"
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#include "devices/tab5_headphone_detect.h"
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#include "devices/tab5_keyboard.h"
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#include "devices/tab5_power_control.h"
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#include "devices/tab_5_camera.h"
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#define TAG "Tab5"
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// PI4IOE5V6408-0 (0x43) bit 1
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constexpr auto GPIO_EXP0_PIN_SPEAKER_ENABLE = 1;
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// PI4IOE5V6408-0 (0x43) bit 7
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constexpr auto GPIO_EXP0_PIN_HEADPHONE_DETECT = 7;
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static void tab5_init_expander0(Device* io_expander0) {
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// Speaker and heapdhone pins are managed at runtime, so we can't have them as a hog in the dts file
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// We have to init them manually.
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auto* speaker_enable_pin = gpio_descriptor_acquire(io_expander0, GPIO_EXP0_PIN_SPEAKER_ENABLE, GPIO_FLAG_DIRECTION_OUTPUT, GPIO_OWNER_GPIO);
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check(speaker_enable_pin);
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auto* headphone_detect_pin = gpio_descriptor_acquire(io_expander0, GPIO_EXP0_PIN_HEADPHONE_DETECT, GPIO_FLAG_DIRECTION_INPUT, GPIO_OWNER_GPIO);
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check(headphone_detect_pin);
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gpio_descriptor_set_level(speaker_enable_pin, false);
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gpio_descriptor_release(speaker_enable_pin);
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gpio_descriptor_release(headphone_detect_pin);
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}
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static void tab5_enable_speaker_amp(Device* io_expander0) {
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auto* speaker_enable_pin = gpio_descriptor_acquire(io_expander0, GPIO_EXP0_PIN_SPEAKER_ENABLE, GPIO_FLAG_DIRECTION_OUTPUT, GPIO_OWNER_GPIO);
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check(speaker_enable_pin, "Failed to acquire speaker enable pin");
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error_t error = gpio_descriptor_set_level(speaker_enable_pin, true);
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gpio_descriptor_release(speaker_enable_pin);
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if (error != ERROR_NONE) {
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LOG_E(TAG, "Failed to enable amplifier: %s", error_to_string(error));
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}
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}
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// Fires for every device's start/stop in the system; initializes io_expander0's pins and enables
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// the speaker amplifier once io_expander0 itself has started.
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static void on_io_expander0_started(Device* device, DeviceEvent event, void* context) {
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(void)context;
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static bool did_init = false;
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if (did_init || event != DEVICE_EVENT_STARTED || strcmp(device->name, "io_expander0") != 0) {
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return;
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}
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did_init = true;
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tab5_init_expander0(device);
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tab5_enable_speaker_amp(device);
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}
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extern "C" {
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static error_t start() {
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/* Crash when construct fails, because if a single driver fails to construct,
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* there is no guarantee that the previously constructed drivers can be destroyed */
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check(driver_construct_add(&tab5_keyboard_driver) == ERROR_NONE);
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check(driver_construct_add(&tab5_power_control_driver) == ERROR_NONE);
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tab5_detect_start();
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tab5_camera_init();
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device_listener_add(on_io_expander0_started, nullptr);
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tab5_headphone_detect_start();
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return ERROR_NONE;
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}
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static error_t stop() {
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tab5_headphone_detect_stop();
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device_listener_remove(on_io_expander0_started);
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tab5_detect_stop();
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/* Crash when destruct fails, because if a single driver fails to destruct,
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* there is no guarantee that the previously destroyed drivers can be recovered */
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check(driver_remove_destruct(&tab5_keyboard_driver) == ERROR_NONE);
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check(driver_remove_destruct(&tab5_power_control_driver) == ERROR_NONE);
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return ERROR_NONE;
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}
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Module m5stack_tab5_module = {
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.name = "m5stack-tab5",
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.start = start,
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.stop = stop,
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.symbols = nullptr,
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.internal = nullptr
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};
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}
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