blob: 1d1c45f017049cf55dd0530e3134e7a3be6ab19e [file] [log] [blame]
// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#pragma once
#include <ddk/metadata/buttons.h>
#include <ddk/protocol/gpio.h>
#include <ddktl/device.h>
#include <ddktl/protocol/hidbus.h>
#include <fbl/array.h>
#include <fbl/mutex.h>
#include <hid/buttons.h>
#include <lib/zx/interrupt.h>
#include <lib/zx/port.h>
#include <zircon/thread_annotations.h>
#include <optional>
namespace buttons {
// zx_port_packet::key.
constexpr uint64_t kPortKeyShutDown = 0x01;
// Start of up to kNumberOfRequiredGpios port types used for interrupts.
constexpr uint64_t kPortKeyInterruptStart = 0x10;
class HidButtonsDevice;
using DeviceType = ddk::Device<HidButtonsDevice, ddk::Unbindable>;
class HidButtonsDevice : public DeviceType,
public ddk::HidbusProtocol<HidButtonsDevice, ddk::base_protocol> {
public:
struct Gpio {
gpio_protocol_t gpio;
zx::interrupt irq;
buttons_gpio_config_t config;
};
explicit HidButtonsDevice(zx_device_t* device)
: DeviceType(device) {}
virtual ~HidButtonsDevice() = default;
// Methods required by the ddk mixins.
zx_status_t HidbusStart(const hidbus_ifc_protocol_t* ifc) TA_EXCL(client_lock_);
zx_status_t HidbusQuery(uint32_t options, hid_info_t* info);
void HidbusStop() TA_EXCL(client_lock_);
zx_status_t HidbusGetDescriptor(uint8_t desc_type, void** data, size_t* len);
zx_status_t HidbusGetReport(uint8_t rpt_type, uint8_t rpt_id, void* data,
size_t len, size_t* out_len) TA_EXCL(client_lock_);
zx_status_t HidbusSetReport(uint8_t rpt_type, uint8_t rpt_id, const void* data, size_t len);
zx_status_t HidbusGetIdle(uint8_t rpt_id, uint8_t* duration);
zx_status_t HidbusSetIdle(uint8_t rpt_id, uint8_t duration);
zx_status_t HidbusGetProtocol(uint8_t* protocol);
zx_status_t HidbusSetProtocol(uint8_t protocol);
void DdkUnbind();
void DdkRelease();
zx_status_t Bind(fbl::Array<Gpio> gpios,
fbl::Array<buttons_button_config_t> buttons);
protected:
// Protected for unit testing.
void ShutDown() TA_EXCL(client_lock_);
zx::port port_;
private:
int Thread();
void ReconfigurePolarity(uint32_t idx, uint64_t int_port);
zx_status_t ConfigureInterrupt(uint32_t idx, uint64_t int_port);
bool MatrixScan(uint32_t row, uint32_t col, zx_duration_t delay);
thrd_t thread_;
fbl::Mutex client_lock_;
ddk::HidbusIfcProtocolClient client_ TA_GUARDED(client_lock_);
fbl::Array<buttons_button_config_t> buttons_;
fbl::Array<Gpio> gpios_;
std::optional<uint8_t> fdr_gpio_;
};
} // namespace buttons