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Mon, 23 Jun 2025 09:02:15 -0700 (PDT) From: Saalim Quadri To: jikos@kernel.org, bentiss@kernel.org Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, Saalim Quadri Subject: [PATCH v2] HID: Xinmeng: Add driver for Xinmeng M71 Keyboard Date: Mon, 23 Jun 2025 21:32:10 +0530 Message-Id: <20250623160210.498570-1-danascape@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In this driver, the battery is probed, and it checks the capacity and charging status of the battery Signed-off-by: Saalim Quadri --- v1 -> v2: Update Kconfig paragraph :/ drivers/hid/Kconfig | 12 +++ drivers/hid/Makefile | 1 + drivers/hid/hid-ids.h | 3 + drivers/hid/hid-xinmeng.c | 168 ++++++++++++++++++++++++++++++++++++++ 4 files changed, 184 insertions(+) create mode 100644 drivers/hid/hid-xinmeng.c diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig index 43859fc75747..1cc61ca63682 100644 --- a/drivers/hid/Kconfig +++ b/drivers/hid/Kconfig @@ -536,6 +536,18 @@ config HID_XIAOMI Adds support for side buttons of Xiaomi Mi Dual Mode Wireless Mouse Silent Edition. +config HID_XINMENG + tristate "Xinmeng Keyboards" + depends on USB_HID + help + Support for Xinmeng Keyboard. + + Say Y here if you have a Xinmeng M71 Keyboard + and want to be able to read its battery capacity. + + To compile this driver as a module, choose M here: the + module will be called hid-xinmeng. + config HID_GYRATION tristate "Gyration remote control" help diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile index 10ae5dedbd84..e5c9d1276138 100644 --- a/drivers/hid/Makefile +++ b/drivers/hid/Makefile @@ -145,6 +145,7 @@ obj-$(CONFIG_HID_UDRAW_PS3) += hid-udraw-ps3.o obj-$(CONFIG_HID_UNIVERSAL_PIDFF) += hid-universal-pidff.o obj-$(CONFIG_HID_LED) += hid-led.o obj-$(CONFIG_HID_XIAOMI) += hid-xiaomi.o +obj-$(CONFIG_HID_XINMENG) += hid-xinmeng.o obj-$(CONFIG_HID_XINMO) += hid-xinmo.o obj-$(CONFIG_HID_ZEROPLUS) += hid-zpff.o obj-$(CONFIG_HID_ZYDACRON) += hid-zydacron.o diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h index e3fb4e2fe911..f649549bd58c 100644 --- a/drivers/hid/hid-ids.h +++ b/drivers/hid/hid-ids.h @@ -1471,6 +1471,9 @@ #define USB_DEVICE_ID_XIN_MO_DUAL_ARCADE 0x05e1 #define USB_DEVICE_ID_THT_2P_ARCADE 0x75e1 +#define USB_VENDOR_ID_XINMENG 0x3554 +#define USB_DEVICE_ID_XINMENG_M71_RECEIVER 0xfa09 + #define USB_VENDOR_ID_XIROKU 0x1477 #define USB_DEVICE_ID_XIROKU_SPX 0x1006 #define USB_DEVICE_ID_XIROKU_MPX 0x1007 diff --git a/drivers/hid/hid-xinmeng.c b/drivers/hid/hid-xinmeng.c new file mode 100644 index 000000000000..53f0a96e7f3d --- /dev/null +++ b/drivers/hid/hid-xinmeng.c @@ -0,0 +1,168 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * HID driver for Xinmeng M71 Keyboard. + * + * Copyright (c) 2025 Saalim Quadri + */ + +#include +#include +#include +#include + +#include "hid-ids.h" + +#define BATTERY_REPORT_ID (0x13) + +struct xinmeng_drvdata { + struct hid_device *hdev; + bool online; + + struct power_supply *battery; + struct power_supply_desc battery_desc; + u8 battery_capacity; + bool battery_charging; +}; + +static enum power_supply_property xinmeng_battery_props[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_CAPACITY, + POWER_SUPPLY_PROP_MODEL_NAME, + POWER_SUPPLY_PROP_ONLINE +}; + +static int xinmeng_battery_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct xinmeng_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_ONLINE: + val->intval = drv_data->online; + break; + case POWER_SUPPLY_PROP_STATUS: + if (drv_data->online) + val->intval = drv_data->battery_charging ? + POWER_SUPPLY_STATUS_CHARGING : + POWER_SUPPLY_STATUS_DISCHARGING; + else + val->intval = POWER_SUPPLY_STATUS_UNKNOWN; + break; + case POWER_SUPPLY_PROP_CAPACITY: + val->intval = drv_data->battery_capacity; + break; + case POWER_SUPPLY_PROP_MODEL_NAME: + val->strval = drv_data->hdev->name; + break; + default: + ret = -EINVAL; + break; + } + return ret; +} + +static int xinmeng_battery_probe(struct hid_device *hdev) +{ + struct xinmeng_drvdata *drv_data = hid_get_drvdata(hdev); + struct power_supply_config pscfg = { .drv_data = drv_data }; + int ret = 0; + + drv_data->online = false; + drv_data->battery_capacity = 0; + + drv_data->battery_desc.name = "xinmeng-m71-battery"; + drv_data->battery_desc.type = POWER_SUPPLY_TYPE_BATTERY; + drv_data->battery_desc.properties = xinmeng_battery_props; + drv_data->battery_desc.num_properties = ARRAY_SIZE(xinmeng_battery_props); + drv_data->battery_desc.get_property = xinmeng_battery_get_property; + + 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); + + return ret; +} + +static int xinmeng_probe(struct hid_device *hdev, const struct hid_device_id *id) +{ + int ret; + struct xinmeng_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 (xinmeng_battery_probe(hdev) < 0) + hid_err(hdev, "Xinmeng hid battery_probe failed: %d\n", ret); + } + + return 0; +} + +static int xinmeng_raw_event(struct hid_device *hdev, + struct hid_report *report, u8 *data, int size) +{ + + struct xinmeng_drvdata *drv_data = hid_get_drvdata(hdev); + + if (drv_data->battery && data[0] == BATTERY_REPORT_ID) { + u8 charging_status = data[7]; + bool is_charging = (charging_status == 0x11 || charging_status == 0x10); + + drv_data->battery_capacity = data[6]; + drv_data->battery_charging = is_charging; + drv_data->online = true; + } + + return 0; +} + +static const struct hid_device_id xinmeng_devices[] = { + { HID_USB_DEVICE(USB_VENDOR_ID_XINMENG, USB_DEVICE_ID_XINMENG_M71_RECEIVER) }, + { } +}; +MODULE_DEVICE_TABLE(hid, xinmeng_devices); + +static struct hid_driver xinmeng_driver = { + .name = "xinmeng", + .id_table = xinmeng_devices, + .probe = xinmeng_probe, + .raw_event = xinmeng_raw_event +}; +module_hid_driver(xinmeng_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("HID driver for Xinmeng keyboards"); +MODULE_AUTHOR("Saalim Quadri ");