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HID: Kysona: Add basic battery reporting for Kysona M600
In this initial the battery is only probed once, a following patch will add periodic checking. Signed-off-by: Lode Willems <me@lodewillems.com> Signed-off-by: Jiri Kosina <jkosina@suse.com>
This commit is contained in:
Lode Willems
Jiri Kosina
parent
ff39b0bbc2
commit
30c32d0529
@ -465,6 +465,15 @@ config HID_KYE
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- MousePen i608X tablet
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- EasyPen M610X tablet
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config HID_KYSONA
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tristate "Kysona devices"
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depends on USB_HID
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help
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Support for Kysona mice.
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Say Y here if you have a Kysona M600 mouse
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and want to be able to read its battery capacity.
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config HID_UCLOGIC
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tristate "UC-Logic"
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depends on USB_HID
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@ -70,6 +70,7 @@ obj-$(CONFIG_HID_JABRA) += hid-jabra.o
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obj-$(CONFIG_HID_KENSINGTON) += hid-kensington.o
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obj-$(CONFIG_HID_KEYTOUCH) += hid-keytouch.o
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obj-$(CONFIG_HID_KYE) += hid-kye.o
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obj-$(CONFIG_HID_KYSONA) += hid-kysona.o
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obj-$(CONFIG_HID_LCPOWER) += hid-lcpower.o
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obj-$(CONFIG_HID_LENOVO) += hid-lenovo.o
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obj-$(CONFIG_HID_LETSKETCH) += hid-letsketch.o
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208
drivers/hid/hid-kysona.c
Normal file
208
drivers/hid/hid-kysona.c
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@ -0,0 +1,208 @@
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* USB HID driver for Kysona
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* Kysona M600 mice.
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*
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* Copyright (c) 2024 Lode Willems <me@lodewillems.com>
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*/
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/usb.h>
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#include "hid-ids.h"
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#define BATTERY_REPORT_ID 4
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struct kysona_drvdata {
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struct hid_device *hdev;
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struct power_supply_desc battery_desc;
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struct power_supply *battery;
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u8 battery_capacity;
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bool battery_charging;
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u16 battery_voltage;
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};
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static enum power_supply_property kysona_battery_props[] = {
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POWER_SUPPLY_PROP_STATUS,
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POWER_SUPPLY_PROP_PRESENT,
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POWER_SUPPLY_PROP_CAPACITY,
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POWER_SUPPLY_PROP_SCOPE,
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POWER_SUPPLY_PROP_MODEL_NAME,
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POWER_SUPPLY_PROP_VOLTAGE_NOW
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};
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static int kysona_battery_get_property(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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{
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struct kysona_drvdata *drv_data = power_supply_get_drvdata(psy);
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int ret = 0;
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switch (psp) {
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case POWER_SUPPLY_PROP_PRESENT:
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val->intval = 1;
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break;
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case POWER_SUPPLY_PROP_STATUS:
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// TODO: check if device is online
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val->intval = drv_data->battery_charging ?
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POWER_SUPPLY_STATUS_CHARGING :
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POWER_SUPPLY_STATUS_DISCHARGING;
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break;
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case POWER_SUPPLY_PROP_SCOPE:
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val->intval = POWER_SUPPLY_SCOPE_DEVICE;
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break;
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case POWER_SUPPLY_PROP_CAPACITY:
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val->intval = drv_data->battery_capacity;
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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/* hardware reports voltage in mV. sysfs expects uV */
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val->intval = drv_data->battery_voltage * 1000;
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break;
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case POWER_SUPPLY_PROP_MODEL_NAME:
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val->strval = drv_data->hdev->name;
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break;
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default:
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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static const char kysona_battery_request[] = {
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0x08, BATTERY_REPORT_ID, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x49
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};
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static int kysona_m600_fetch_battery(struct hid_device *hdev)
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{
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u8 *write_buf;
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int ret;
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/* Request battery information */
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write_buf = kmemdup(kysona_battery_request, sizeof(kysona_battery_request), GFP_KERNEL);
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if (!write_buf)
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return -ENOMEM;
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ret = hid_hw_raw_request(hdev, kysona_battery_request[0],
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write_buf, sizeof(kysona_battery_request),
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HID_OUTPUT_REPORT, HID_REQ_SET_REPORT);
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if (ret < (int)sizeof(kysona_battery_request)) {
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hid_err(hdev, "hid_hw_raw_request() failed with %d\n", ret);
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ret = -ENODATA;
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}
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kfree(write_buf);
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return ret;
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}
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static void kysona_fetch_battery(struct hid_device *hdev)
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{
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int ret = kysona_m600_fetch_battery(hdev);
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if (ret < 0)
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hid_dbg(hdev,
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"Battery query failed (err: %d)\n", ret);
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}
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static int kysona_battery_probe(struct hid_device *hdev)
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{
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struct kysona_drvdata *drv_data = hid_get_drvdata(hdev);
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struct power_supply_config pscfg = { .drv_data = drv_data };
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int ret = 0;
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drv_data->battery_capacity = 100;
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drv_data->battery_desc.properties = kysona_battery_props;
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drv_data->battery_desc.num_properties = ARRAY_SIZE(kysona_battery_props);
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drv_data->battery_desc.get_property = kysona_battery_get_property;
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drv_data->battery_desc.type = POWER_SUPPLY_TYPE_BATTERY;
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drv_data->battery_desc.use_for_apm = 0;
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drv_data->battery_desc.name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
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"kysona-%s-battery",
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strlen(hdev->uniq) ?
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hdev->uniq : dev_name(&hdev->dev));
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if (!drv_data->battery_desc.name)
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return -ENOMEM;
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drv_data->battery = devm_power_supply_register(&hdev->dev,
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&drv_data->battery_desc, &pscfg);
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if (IS_ERR(drv_data->battery)) {
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ret = PTR_ERR(drv_data->battery);
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drv_data->battery = NULL;
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hid_err(hdev, "Unable to register battery device\n");
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return ret;
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}
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power_supply_powers(drv_data->battery, &hdev->dev);
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kysona_fetch_battery(hdev);
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return ret;
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}
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static int kysona_probe(struct hid_device *hdev, const struct hid_device_id *id)
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{
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int ret;
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struct kysona_drvdata *drv_data;
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struct usb_interface *usbif;
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if (!hid_is_usb(hdev))
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return -EINVAL;
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usbif = to_usb_interface(hdev->dev.parent);
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drv_data = devm_kzalloc(&hdev->dev, sizeof(*drv_data), GFP_KERNEL);
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if (!drv_data)
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return -ENOMEM;
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hid_set_drvdata(hdev, drv_data);
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drv_data->hdev = hdev;
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ret = hid_parse(hdev);
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if (ret)
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return ret;
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ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
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if (ret)
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return ret;
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if (usbif->cur_altsetting->desc.bInterfaceNumber == 1) {
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if (kysona_battery_probe(hdev) < 0)
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hid_err(hdev, "Kysona hid battery_probe failed: %d\n", ret);
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}
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return 0;
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}
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static int kysona_raw_event(struct hid_device *hdev,
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struct hid_report *report, u8 *data, int size)
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{
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struct kysona_drvdata *drv_data = hid_get_drvdata(hdev);
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if (drv_data->battery && size == sizeof(kysona_battery_request) &&
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data[0] == 8 && data[1] == BATTERY_REPORT_ID) {
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drv_data->battery_capacity = data[6];
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drv_data->battery_charging = data[7];
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drv_data->battery_voltage = (data[8] << 8) | data[9];
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}
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return 0;
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}
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static const struct hid_device_id kysona_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_KYSONA, USB_DEVICE_ID_KYSONA_M600_DONGLE) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_KYSONA, USB_DEVICE_ID_KYSONA_M600_WIRED) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, kysona_devices);
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static struct hid_driver kysona_driver = {
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.name = "kysona",
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.id_table = kysona_devices,
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.probe = kysona_probe,
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.raw_event = kysona_raw_event
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};
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module_hid_driver(kysona_driver);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("HID driver for Kysona devices");
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MODULE_AUTHOR("Lode Willems <me@lodewillems.com>");
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