usb_bc12.h

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/*
 * Copyright (c) 2022 Google LLC
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_DRIVERS_USB_USB_BC12_H_
#define ZEPHYR_INCLUDE_DRIVERS_USB_USB_BC12_H_
 
#include <zephyr/device.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
/* FIXME - make these Kconfig options */
 
#define BC12_CHARGER_VOLTAGE_UV  5000 * 1000
#define BC12_CHARGER_MIN_CURR_UA 2500
#define BC12_CHARGER_MAX_CURR_UA 1500 * 1000
 
#define BC12_CURR_UA(val) CLAMP(val, BC12_CHARGER_MIN_CURR_UA, BC12_CHARGER_MAX_CURR_UA)
enum bc12_role {
        BC12_DISCONNECTED,
        BC12_PORTABLE_DEVICE,
        BC12_CHARGING_PORT,
};
 
enum bc12_type {
        BC12_TYPE_NONE,
        BC12_TYPE_SDP,
        BC12_TYPE_DCP,
        BC12_TYPE_CDP,
        BC12_TYPE_PROPRIETARY,
        BC12_TYPE_UNKNOWN,
        BC12_TYPE_COUNT,
};
 
struct bc12_partner_state {
        enum bc12_role bc12_role;
        union {
                struct {
                        enum bc12_type type;
                        int current_ua;
                        int voltage_uv;
                };
                struct {
                        bool pd_partner_connected;
                };
        };
};
 
typedef void (*bc12_callback_t)(const struct device *dev, struct bc12_partner_state *state,
                                void *user_data);
 
__subsystem struct bc12_driver_api {
        int (*set_role)(const struct device *dev, enum bc12_role role);
        int (*set_result_cb)(const struct device *dev, bc12_callback_t cb, void *user_data);
};
__syscall int bc12_set_role(const struct device *dev, enum bc12_role role);
 
static inline int z_impl_bc12_set_role(const struct device *dev, enum bc12_role role)
{
        const struct bc12_driver_api *api = (const struct bc12_driver_api *)dev->api;
 
        return api->set_role(dev, role);
}
 
__syscall int bc12_set_result_cb(const struct device *dev, bc12_callback_t cb, void *user_data);
 
static inline int z_impl_bc12_set_result_cb(const struct device *dev, bc12_callback_t cb,
                                            void *user_data)
{
        const struct bc12_driver_api *api = (const struct bc12_driver_api *)dev->api;
 
        return api->set_result_cb(dev, cb, user_data);
}
 
#ifdef __cplusplus
}
#endif
 
#include <zephyr/syscalls/usb_bc12.h>
 
#endif /* ZEPHYR_INCLUDE_DRIVERS_USB_USB_BC12_H_ */