--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * USB HID driver for Kysona
+ * Kysona M600 mice.
+ *
+ * Copyright (c) 2024 Lode Willems <me@lodewillems.com>
+ */
+
+#include <linux/device.h>
+#include <linux/hid.h>
+#include <linux/usb.h>
+
+#include "hid-ids.h"
+
+#define BATTERY_REPORT_ID 4
+
+struct kysona_drvdata {
+ struct hid_device *hdev;
+ struct power_supply_desc battery_desc;
+ struct power_supply *battery;
+ u8 battery_capacity;
+ bool battery_charging;
+ u16 battery_voltage;
+};
+
+static enum power_supply_property kysona_battery_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_SCOPE,
+ POWER_SUPPLY_PROP_MODEL_NAME,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW
+};
+
+static int kysona_battery_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct kysona_drvdata *drv_data = power_supply_get_drvdata(psy);
+ int ret = 0;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = 1;
+ break;
+ case POWER_SUPPLY_PROP_STATUS:
+ // TODO: check if device is online
+ val->intval = drv_data->battery_charging ?
+ POWER_SUPPLY_STATUS_CHARGING :
+ POWER_SUPPLY_STATUS_DISCHARGING;
+ break;
+ case POWER_SUPPLY_PROP_SCOPE:
+ val->intval = POWER_SUPPLY_SCOPE_DEVICE;
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY:
+ val->intval = drv_data->battery_capacity;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ /* hardware reports voltage in mV. sysfs expects uV */
+ val->intval = drv_data->battery_voltage * 1000;
+ break;
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = drv_data->hdev->name;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ return ret;
+}
+
+static const char kysona_battery_request[] = {
+ 0x08, BATTERY_REPORT_ID, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x49
+};
+
+static int kysona_m600_fetch_battery(struct hid_device *hdev)
+{
+ u8 *write_buf;
+ int ret;
+
+ /* Request battery information */
+ write_buf = kmemdup(kysona_battery_request, sizeof(kysona_battery_request), GFP_KERNEL);
+ if (!write_buf)
+ return -ENOMEM;
+
+ ret = hid_hw_raw_request(hdev, kysona_battery_request[0],
+ write_buf, sizeof(kysona_battery_request),
+ HID_OUTPUT_REPORT, HID_REQ_SET_REPORT);
+ if (ret < (int)sizeof(kysona_battery_request)) {
+ hid_err(hdev, "hid_hw_raw_request() failed with %d\n", ret);
+ ret = -ENODATA;
+ }
+ kfree(write_buf);
+ return ret;
+}
+
+static void kysona_fetch_battery(struct hid_device *hdev)
+{
+ int ret = kysona_m600_fetch_battery(hdev);
+
+ if (ret < 0)
+ hid_dbg(hdev,
+ "Battery query failed (err: %d)\n", ret);
+}
+
+static int kysona_battery_probe(struct hid_device *hdev)
+{
+ struct kysona_drvdata *drv_data = hid_get_drvdata(hdev);
+ struct power_supply_config pscfg = { .drv_data = drv_data };
+ int ret = 0;
+
+ drv_data->battery_capacity = 100;
+
+ drv_data->battery_desc.properties = kysona_battery_props;
+ drv_data->battery_desc.num_properties = ARRAY_SIZE(kysona_battery_props);
+ drv_data->battery_desc.get_property = kysona_battery_get_property;
+ drv_data->battery_desc.type = POWER_SUPPLY_TYPE_BATTERY;
+ drv_data->battery_desc.use_for_apm = 0;
+ drv_data->battery_desc.name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
+ "kysona-%s-battery",
+ strlen(hdev->uniq) ?
+ hdev->uniq : dev_name(&hdev->dev));
+ if (!drv_data->battery_desc.name)
+ return -ENOMEM;
+
+ drv_data->battery = devm_power_supply_register(&hdev->dev,
+ &drv_data->battery_desc, &pscfg);
+ if (IS_ERR(drv_data->battery)) {
+ ret = PTR_ERR(drv_data->battery);
+ drv_data->battery = NULL;
+ hid_err(hdev, "Unable to register battery device\n");
+ return ret;
+ }
+
+ power_supply_powers(drv_data->battery, &hdev->dev);
+ kysona_fetch_battery(hdev);
+
+ return ret;
+}
+
+static int kysona_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+ int ret;
+ struct kysona_drvdata *drv_data;
+ struct usb_interface *usbif;
+
+ if (!hid_is_usb(hdev))
+ return -EINVAL;
+
+ usbif = to_usb_interface(hdev->dev.parent);
+
+ drv_data = devm_kzalloc(&hdev->dev, sizeof(*drv_data), GFP_KERNEL);
+ if (!drv_data)
+ return -ENOMEM;
+
+ hid_set_drvdata(hdev, drv_data);
+ drv_data->hdev = hdev;
+
+ ret = hid_parse(hdev);
+ if (ret)
+ return ret;
+
+ ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+ if (ret)
+ return ret;
+
+ if (usbif->cur_altsetting->desc.bInterfaceNumber == 1) {
+ if (kysona_battery_probe(hdev) < 0)
+ hid_err(hdev, "Kysona hid battery_probe failed: %d\n", ret);
+ }
+
+ return 0;
+}
+
+static int kysona_raw_event(struct hid_device *hdev,
+ struct hid_report *report, u8 *data, int size)
+{
+ struct kysona_drvdata *drv_data = hid_get_drvdata(hdev);
+
+ if (drv_data->battery && size == sizeof(kysona_battery_request) &&
+ data[0] == 8 && data[1] == BATTERY_REPORT_ID) {
+ drv_data->battery_capacity = data[6];
+ drv_data->battery_charging = data[7];
+ drv_data->battery_voltage = (data[8] << 8) | data[9];
+ }
+
+ return 0;
+}
+
+static const struct hid_device_id kysona_devices[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_KYSONA, USB_DEVICE_ID_KYSONA_M600_DONGLE) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_KYSONA, USB_DEVICE_ID_KYSONA_M600_WIRED) },
+ { }
+};
+MODULE_DEVICE_TABLE(hid, kysona_devices);
+
+static struct hid_driver kysona_driver = {
+ .name = "kysona",
+ .id_table = kysona_devices,
+ .probe = kysona_probe,
+ .raw_event = kysona_raw_event
+};
+module_hid_driver(kysona_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("HID driver for Kysona devices");
+MODULE_AUTHOR("Lode Willems <me@lodewillems.com>");
projects / thirdparty / linux.git / commitdiff
