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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef TOUCHSCREEN_BUS_NEGOTIATOR_H
#define TOUCHSCREEN_BUS_NEGOTIATOR_H
#include <linux/notifier.h>
#include <linux/mutex.h>
#include <linux/device.h>
#include <linux/cdev.h>
#include <linux/kthread.h>
#define TBN_DEVICE_NAME "tbn"
#define TBN_CLASS_NAME "tbn"
#define TBN_REQUEST_BUS_TIMEOUT_MS 500
#define TBN_RELEASE_BUS_TIMEOUT_MS 500
enum tbn_mode {
TBN_MODE_DISABLED = 0,
TBN_MODE_GPIO,
TBN_MODE_AOC_CHANNEL,
TBN_MODE_MOCK,
};
enum tbn_bus_owner {
TBN_BUS_OWNER_AP = 0,
TBN_BUS_OWNER_AOC = 1,
};
enum TbnOperation : __u32 {
TBN_OPERATION_IDLE = 0,
TBN_OPERATION_AP_RELEASE_BUS,
TBN_OPERATION_AP_REQUEST_BUS,
};
struct TbnEvent {
__u32 id;
enum TbnOperation operation;
} __packed;
struct TbnEventResponse {
__u32 id;
__s32 err;
enum TbnOperation operation;
bool lptw_triggered;
} __packed;
struct tbn_context {
struct device *dev;
struct completion bus_requested;
struct completion bus_released;
struct mutex dev_mask_mutex;
u32 mode;
u32 max_devices;
u32 registered_mask;
u32 requested_dev_mask;
int aoc2ap_gpio;
int ap2aoc_gpio;
int aoc2ap_irq;
struct task_struct *aoc_channel_task;
/* event management */
struct TbnEventResponse event_resp;
#if IS_ENABLED(CONFIG_TOUCHSCREEN_TBN_AOC_CHANNEL_MODE)
struct TbnEvent event;
struct mutex event_lock;
#endif
};
int register_tbn(u32 *output);
void unregister_tbn(u32 *output);
int tbn_request_bus_with_result(u32 dev_mask, bool *lptw_triggered);
int tbn_request_bus(u32 dev_mask);
int tbn_release_bus(u32 dev_mask);
#endif /* TOUCHSCREEN_BUS_NEGOTIATOR_H */
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