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/*
* Logitech Unifying receiver emulation (HID++ protocol).
*
* Copyright (c) 2014 Peter Wu <peter@lekensteyn.nl>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef HID_LOGITECH_DJ_H
#define HID_LOGITECH_DJ_H
/* HID requests ((bmRequestType << 8) | bRequest) */
#define HID_GET_REPORT 0xa101
#define HID_GET_IDLE 0xa102
#define HID_GET_PROTOCOL 0xa103
/* 0x04-0x08 Reserved */
#define HID_SET_REPORT 0x2109
#define HID_SET_IDLE 0x210a
#define HID_SET_PROTOCOL 0x210b
/* interface numbers (also used for array indices) */
enum {
IFACE_KBD, /* keyboard */
IFACE_MSE, /* mouse; multimedia, power, media center buttons */
IFACE_HIDPP, /* HID++, DJ */
};
#define MAX_DEVICES 6
/* report formats */
typedef struct {
uint8_t report_id;
uint8_t device_index;
uint8_t sub_id;
union {
uint8_t params[4];
struct {
uint8_t address;
uint8_t value[3];
}; /* for register queries */
};
} HidppMsgShort;
typedef struct {
uint8_t report_id;
uint8_t device_index;
uint8_t sub_id;
union {
uint8_t params[17];
struct {
uint8_t address;
uint8_t value[16];
}; /* for register queries */
};
} HidppMsgLong;
typedef struct {
uint8_t report_id;
uint8_t device_index;
uint8_t report_type;
uint8_t payload[12];
} DjMsgShort;
typedef struct {
uint8_t report_id;
uint8_t device_index;
uint8_t report_type;
uint8_t payload[29];
} DjMsgLong;
/* generic HID++ or DJ report */
typedef struct {
union {
struct {
uint8_t report_id;
uint8_t device_index;
};
HidppMsgShort hidpp_s;
HidppMsgLong hidpp_l;
DjMsgShort dj_s;
DjMsgLong dj_l;
};
} HidppMsg;
/* information to generate an error output report */
typedef struct {
uint8_t device_index;
uint8_t sub_id;
uint8_t address;
#define HIDPP_ERR_SUCCESS 0x00
#define HIDPP_ERR_INVALID_SUBID 0x01
#define HIDPP_ERR_INVALID_ADDRESS 0x02
#define HIDPP_ERR_INVALID_VALUE 0x03
#define HIDPP_ERR_CONNECT_FAIL 0x04
#define HIDPP_ERR_TOO_MANY_DEVICES 0x05
#define HIDPP_ERR_ALREADY_EXISTS 0x06
#define HIDPP_ERR_BUSY 0x07
#define HIDPP_ERR_UNKNOWN_DEVICE 0x08
#define HIDPP_ERR_RESOURCE_ERROR 0x09
#define HIDPP_ERR_REQUEST_UNAVAILABLE 0x0A
#define HIDPP_ERR_INVALID_PARAM_VALUE 0x0B
#define HIDPP_ERR_WRONG_PIN_CODE 0x0C
uint8_t error;
} HidppError;
/* device and receiver info */
struct firmware_version {
uint8_t fw_major;
uint8_t fw_minor;
uint16_t fw_build;
/* boot loader */
uint8_t bl_major;
uint8_t bl_minor;
};
typedef struct {
struct {
uint32_t serial;
struct firmware_version version;
} info; /* static information */
#define REPORTING_FLAG_DEV_BATTERY_STATUS (1 << 4)
#define REPORTING_FLAG_DEV_MASK REPORTING_FLAG_DEV_BATTERY_STATUS
int reporting_flags;
uint8_t activity_counter[MAX_DEVICES];
/* TODO: pairing lock open or closed (+ timeout) */
/* TODO: connected devices */
/* TODO: device firmware upgrade things? */
} LHidReceiver;
typedef struct {
struct {
enum {
DEVTYPE_KEYBOARD = 1,
DEVTYPE_MOUSE,
DEVTYPE_NUMPAD,
DEVTYPE_PRESENTER,
/* 0x05..0x07 Reserved for future */
DEVTYPE_TRACKBALL = 8,
DEVTYPE_TOUCHPAD,
/* 0x0A..0x0F Reserved */
} device_type;
enum {
PROTO_UNIFYING = 4,
} protocol_type;
struct firmware_version version;
uint16_t protocol_version; /* HID++ protocol version */
uint16_t wireless_pid;
uint32_t serial;
char name[15];
uint8_t usability_info; /* bits 0..3 power switch location */
uint32_t report_types; /* supported report types (e.g. mouse) */
/* TODO: feature set */
/* TODO: special mouse and key button mappings */
} info; /* static information */
HIDState *hid;
enum {
LTUNIFY_MODE_HID = 1,
LTUNIFY_MODE_DJ = 2
} mode;
bool powered_on; /* "link established, in range" */
bool link_encrypted;
uint8_t report_interval;
#define REPORTING_FLAG_RCV_WIRELESS_NOTIFS 1
#define REPORTING_FLAG_RCV_SOFTWARE_PRESENT (1 << 3)
#define REPORTING_FLAG_RCV_MASK (REPORTING_FLAG_RCV_WIRELESS_NOTIFS | \
REPORTING_FLAG_RCV_SOFTWARE_PRESENT)
int reporting_flags;
/* TODO: status (device seen or not, encrypted link) */
struct {
uint8_t level;
enum {
BAT_STS_CHARGING,
/* TODO: charging, discharging, etc. */
} status;
} battery;
uint8_t activity_counter;
} LHidDevice;
/* helper macros for handling the report and error queue */
#define LQUEUE_SIZE(q) ARRAY_SIZE((q).reports)
#define LQUEUE_WRAP(q, val) ((val) & (LQUEUE_SIZE((q)) - 1u))
#define LQUEUE_INCR(q, var) ((var) = LQUEUE_WRAP((q), (var) + 1))
typedef struct USBLtunifyState {
USBDevice dev;
USBEndpoint *intr[3]; /* interfaces (keyboard, mouse, DJ) */
UsbDumpState *usb_dump_state;
HIDState hid[2]; /* HID devices (keyboard, mouse) */
/* queue for HID++ requests and responses */
struct {
HidppMsg reports[16];
unsigned head;
unsigned n;
} input_queue;
struct {
HidppMsg reports[16];
unsigned head;
unsigned n;
} output_queue;
/* receiver error queue (to be send): drop if full */
struct {
HidppMsgShort reports[2];
unsigned head;
unsigned n;
} error_queue;
LHidReceiver receiver;
LHidDevice devices[MAX_DEVICES]; /* paired devices */
} USBLtunifyState;
/* handle control packets for interface 3 (HID++ / DJ) */
void usb_ltunify_handle_control_hidpp(USBDevice *dev, USBPacket *p,
int request, int value, int index, int length, uint8_t *data);
/* handle control packets for interface 3 (HID++ / DJ) */
void usb_ltunify_handle_datain_hidpp(USBDevice *dev, USBPacket *p);
void hidpp_reset(USBLtunifyState *s);
void hidpp_init(USBLtunifyState *s);
#endif
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