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/*
* Copyright (c) 2020 The ZMK Contributors
*
* SPDX-License-Identifier: MIT
*/
#include <settings/settings.h>
#include <init.h>
#include <logging/log.h>
LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
#include <bluetooth/bluetooth.h>
#include <bluetooth/gatt.h>
#include <zmk/ble.h>
#include <zmk/hog.h>
#include <zmk/hid.h>
enum {
HIDS_REMOTE_WAKE = BIT(0),
HIDS_NORMALLY_CONNECTABLE = BIT(1),
};
struct hids_info {
uint16_t version; /* version number of base USB HID Specification */
uint8_t code; /* country HID Device hardware is localized for. */
uint8_t flags;
} __packed;
struct hids_report {
uint8_t id; /* report id */
uint8_t type; /* report type */
} __packed;
static struct hids_info info = {
.version = 0x0000,
.code = 0x00,
.flags = HIDS_NORMALLY_CONNECTABLE | HIDS_REMOTE_WAKE,
};
enum {
HIDS_INPUT = 0x01,
HIDS_OUTPUT = 0x02,
HIDS_FEATURE = 0x03,
};
static struct hids_report input = {
.id = 0x01,
.type = HIDS_INPUT,
};
static struct hids_report consumer_input = {
.id = 0x02,
.type = HIDS_INPUT,
};
static bool host_requests_notification = false;
static uint8_t ctrl_point;
// static uint8_t proto_mode;
static ssize_t read_hids_info(struct bt_conn *conn, const struct bt_gatt_attr *attr, void *buf,
uint16_t len, uint16_t offset) {
return bt_gatt_attr_read(conn, attr, buf, len, offset, attr->user_data,
sizeof(struct hids_info));
}
static ssize_t read_hids_report_ref(struct bt_conn *conn, const struct bt_gatt_attr *attr,
void *buf, uint16_t len, uint16_t offset) {
return bt_gatt_attr_read(conn, attr, buf, len, offset, attr->user_data,
sizeof(struct hids_report));
}
static ssize_t read_hids_report_map(struct bt_conn *conn, const struct bt_gatt_attr *attr,
void *buf, uint16_t len, uint16_t offset) {
return bt_gatt_attr_read(conn, attr, buf, len, offset, zmk_hid_report_desc,
sizeof(zmk_hid_report_desc));
}
static ssize_t read_hids_input_report(struct bt_conn *conn, const struct bt_gatt_attr *attr,
void *buf, uint16_t len, uint16_t offset) {
struct zmk_hid_keyboard_report_body *report_body = &zmk_hid_get_keyboard_report()->body;
return bt_gatt_attr_read(conn, attr, buf, len, offset, report_body,
sizeof(struct zmk_hid_keyboard_report_body));
}
static ssize_t read_hids_consumer_input_report(struct bt_conn *conn,
const struct bt_gatt_attr *attr, void *buf,
uint16_t len, uint16_t offset) {
struct zmk_hid_consumer_report_body *report_body = &zmk_hid_get_consumer_report()->body;
return bt_gatt_attr_read(conn, attr, buf, len, offset, report_body,
sizeof(struct zmk_hid_consumer_report_body));
}
// static ssize_t write_proto_mode(struct bt_conn *conn,
// const struct bt_gatt_attr *attr,
// const void *buf, uint16_t len, uint16_t offset,
// uint8_t flags)
// {
// printk("PROTO CHANGED\n");
// return 0;
// }
static void input_ccc_changed(const struct bt_gatt_attr *attr, uint16_t value) {
host_requests_notification = (value == BT_GATT_CCC_NOTIFY) ? 1 : 0;
}
static ssize_t write_ctrl_point(struct bt_conn *conn, const struct bt_gatt_attr *attr,
const void *buf, uint16_t len, uint16_t offset, uint8_t flags) {
uint8_t *value = attr->user_data;
if (offset + len > sizeof(ctrl_point)) {
return BT_GATT_ERR(BT_ATT_ERR_INVALID_OFFSET);
}
memcpy(value + offset, buf, len);
return len;
}
/* HID Service Declaration */
BT_GATT_SERVICE_DEFINE(
hog_svc, BT_GATT_PRIMARY_SERVICE(BT_UUID_HIDS),
// BT_GATT_CHARACTERISTIC(BT_UUID_HIDS_PROTOCOL_MODE, BT_GATT_CHRC_WRITE_WITHOUT_RESP,
// BT_GATT_PERM_WRITE, NULL, write_proto_mode, &proto_mode),
BT_GATT_CHARACTERISTIC(BT_UUID_HIDS_INFO, BT_GATT_CHRC_READ, BT_GATT_PERM_READ, read_hids_info,
NULL, &info),
BT_GATT_CHARACTERISTIC(BT_UUID_HIDS_REPORT_MAP, BT_GATT_CHRC_READ, BT_GATT_PERM_READ_ENCRYPT,
read_hids_report_map, NULL, NULL),
BT_GATT_CHARACTERISTIC(BT_UUID_HIDS_REPORT, BT_GATT_CHRC_READ | BT_GATT_CHRC_NOTIFY,
BT_GATT_PERM_READ_ENCRYPT, read_hids_input_report, NULL, NULL),
BT_GATT_CCC(input_ccc_changed, BT_GATT_PERM_READ_ENCRYPT | BT_GATT_PERM_WRITE_ENCRYPT),
BT_GATT_DESCRIPTOR(BT_UUID_HIDS_REPORT_REF, BT_GATT_PERM_READ_ENCRYPT, read_hids_report_ref,
NULL, &input),
BT_GATT_CHARACTERISTIC(BT_UUID_HIDS_REPORT, BT_GATT_CHRC_READ | BT_GATT_CHRC_NOTIFY,
BT_GATT_PERM_READ_ENCRYPT, read_hids_consumer_input_report, NULL, NULL),
BT_GATT_CCC(input_ccc_changed, BT_GATT_PERM_READ_ENCRYPT | BT_GATT_PERM_WRITE_ENCRYPT),
BT_GATT_DESCRIPTOR(BT_UUID_HIDS_REPORT_REF, BT_GATT_PERM_READ_ENCRYPT, read_hids_report_ref,
NULL, &consumer_input),
BT_GATT_CHARACTERISTIC(BT_UUID_HIDS_CTRL_POINT, BT_GATT_CHRC_WRITE_WITHOUT_RESP,
BT_GATT_PERM_WRITE, NULL, write_ctrl_point, &ctrl_point));
struct bt_conn *destination_connection() {
struct bt_conn *conn;
bt_addr_le_t *addr = zmk_ble_active_profile_addr();
LOG_DBG("Address pointer %p", addr);
if (!bt_addr_le_cmp(addr, BT_ADDR_LE_ANY)) {
LOG_WRN("Not sending, no active address for current profile");
return NULL;
} else if ((conn = bt_conn_lookup_addr_le(BT_ID_DEFAULT, addr)) == NULL) {
LOG_WRN("Not sending, not connected to active profile");
return NULL;
}
return conn;
}
K_THREAD_STACK_DEFINE(hog_q_stack, CONFIG_ZMK_BLE_THREAD_STACK_SIZE);
struct k_work_q hog_work_q;
K_MSGQ_DEFINE(zmk_hog_keyboard_msgq, sizeof(struct zmk_hid_keyboard_report_body),
CONFIG_ZMK_BLE_KEYBOARD_REPORT_QUEUE_SIZE, 4);
void send_keyboard_report_callback(struct k_work *work) {
struct zmk_hid_keyboard_report_body report;
while (k_msgq_get(&zmk_hog_keyboard_msgq, &report, K_NO_WAIT) == 0) {
struct bt_conn *conn = destination_connection();
if (conn == NULL) {
return;
}
struct bt_gatt_notify_params notify_params = {
.attr = &hog_svc.attrs[5],
.data = &report,
.len = sizeof(report),
};
int err = bt_gatt_notify_cb(conn, &notify_params);
if (err) {
LOG_ERR("Error notifying %d", err);
}
bt_conn_unref(conn);
}
}
K_WORK_DEFINE(hog_keyboard_work, send_keyboard_report_callback);
int zmk_hog_send_keyboard_report(struct zmk_hid_keyboard_report_body *report) {
int err = k_msgq_put(&zmk_hog_keyboard_msgq, report, K_MSEC(100));
if (err) {
switch (err) {
case -EAGAIN: {
LOG_WRN("Keyboard message queue full, popping first message and queueing again");
struct zmk_hid_keyboard_report_body discarded_report;
k_msgq_get(&zmk_hog_keyboard_msgq, &discarded_report, K_NO_WAIT);
return zmk_hog_send_keyboard_report(report);
}
default:
LOG_WRN("Failed to queue keyboard report to send (%d)", err);
return err;
}
}
k_work_submit_to_queue(&hog_work_q, &hog_keyboard_work);
return 0;
};
K_MSGQ_DEFINE(zmk_hog_consumer_msgq, sizeof(struct zmk_hid_consumer_report_body),
CONFIG_ZMK_BLE_CONSUMER_REPORT_QUEUE_SIZE, 4);
void send_consumer_report_callback(struct k_work *work) {
struct zmk_hid_consumer_report_body report;
while (k_msgq_get(&zmk_hog_consumer_msgq, &report, K_NO_WAIT) == 0) {
struct bt_conn *conn = destination_connection();
if (conn == NULL) {
return;
}
struct bt_gatt_notify_params notify_params = {
.attr = &hog_svc.attrs[10],
.data = &report,
.len = sizeof(report),
};
int err = bt_gatt_notify_cb(conn, &notify_params);
if (err) {
LOG_DBG("Error notifying %d", err);
}
bt_conn_unref(conn);
}
};
K_WORK_DEFINE(hog_consumer_work, send_consumer_report_callback);
int zmk_hog_send_consumer_report(struct zmk_hid_consumer_report_body *report) {
int err = k_msgq_put(&zmk_hog_consumer_msgq, report, K_MSEC(100));
if (err) {
switch (err) {
case -EAGAIN: {
LOG_WRN("Consumer message queue full, popping first message and queueing again");
struct zmk_hid_consumer_report_body discarded_report;
k_msgq_get(&zmk_hog_consumer_msgq, &discarded_report, K_NO_WAIT);
return zmk_hog_send_consumer_report(report);
}
default:
LOG_WRN("Failed to queue consumer report to send (%d)", err);
return err;
}
}
k_work_submit_to_queue(&hog_work_q, &hog_consumer_work);
return 0;
};
int zmk_hog_init(const struct device *_arg) {
static const struct k_work_queue_config queue_config = {.name = "HID Over GATT Send Work"};
k_work_queue_start(&hog_work_q, hog_q_stack, K_THREAD_STACK_SIZEOF(hog_q_stack),
CONFIG_ZMK_BLE_THREAD_PRIORITY, &queue_config);
return 0;
}
SYS_INIT(zmk_hog_init, APPLICATION, CONFIG_ZMK_BLE_INIT_PRIORITY);