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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* HID driver for Nintendo Switch 2 controllers
*
* Copyright (c) 2025 Valve Software
*
* This driver is based on the following work:
* https://gist.github.com/shinyquagsire23/66f006b46c56216acbaac6c1e2279b64
* https://github.com/ndeadly/switch2_controller_research
*/
#ifndef __HID_NINTENDO_H
#define __HID_NINTENDO_H
#include <linux/bits.h>
#define NS2_FLAG_OK BIT(0)
#define NS2_FLAG_NACK BIT(2)
enum switch2_cmd {
NS2_CMD_NFC = 0x01,
NS2_CMD_FLASH = 0x02,
NS2_CMD_INIT = 0x03,
NS2_CMD_GRIP = 0x08,
NS2_CMD_LED = 0x09,
NS2_CMD_VIBRATE = 0x0a,
NS2_CMD_BATTERY = 0x0b,
NS2_CMD_FEATSEL = 0x0c,
NS2_CMD_FW_UPD = 0x0d,
NS2_CMD_FW_INFO = 0x10,
NS2_CMD_BT_PAIR = 0x15,
};
enum switch2_direction {
NS2_DIR_IN = 0x00,
NS2_DIR_OUT = 0x90,
};
enum switch2_transport {
NS2_TRANS_USB = 0x00,
NS2_TRANS_BT = 0x01,
};
struct switch2_cmd_header {
uint8_t command;
uint8_t flags;
uint8_t transport;
uint8_t subcommand;
uint8_t unk1;
uint8_t length;
uint16_t unk2;
};
static_assert(sizeof(struct switch2_cmd_header) == 8);
struct device;
struct switch2_controller;
struct switch2_cfg_intf {
struct switch2_controller *parent;
struct device *dev;
int (*send_command)(enum switch2_cmd command, uint8_t subcommand,
const void *message, size_t length,
struct switch2_cfg_intf *intf);
void (*shutdown)(struct switch2_cfg_intf *intf);
};
int switch2_controller_attach_cfg(const char *phys, struct switch2_cfg_intf *cfg);
void switch2_controller_detach_cfg(struct switch2_controller *controller);
int switch2_receive_command(struct switch2_controller *controller,
const uint8_t *message, size_t length);
#endif
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