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[108.228.232.20]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2bacb669f7dsm22163335eec.23.2026.02.19.23.06.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 19 Feb 2026 23:06:03 -0800 (PST) From: "Derek J. Clark" To: Jiri Kosina , Benjamin Tissoires Cc: Richard Hughes , Mario Limonciello , Zhixin Zhang , Mia Shao , Mark Pearson , "Pierre-Loup A . Griffais" , "Derek J . Clark" , linux-input@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 08/16] HID: hid-lenovo-go: Add OS Mode Toggle Date: Fri, 20 Feb 2026 07:05:21 +0000 Message-ID: <20260220070533.4083667-9-derekjohn.clark@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260220070533.4083667-1-derekjohn.clark@gmail.com> References: <20260220070533.4083667-1-derekjohn.clark@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Adds OS Mode toggle, who's primary function is to change the built-in functional chords to use the right handle legion button instead of the left handle legion button as the mode shift key. This setting needs to be restored after resume, so a reset-resume hook is added. Reviewed-by: Mark Pearson Signed-off-by: Derek J. Clark --- V3: - Fix collision with os_mode_index attribute and os_mode_index enum. --- drivers/hid/hid-lenovo-go.c | 137 ++++++++++++++++++++++++++++++++++++ 1 file changed, 137 insertions(+) diff --git a/drivers/hid/hid-lenovo-go.c b/drivers/hid/hid-lenovo-go.c index b5a1d3e1988f2..883e75894a437 100644 --- a/drivers/hid/hid-lenovo-go.c +++ b/drivers/hid/hid-lenovo-go.c @@ -76,6 +76,7 @@ struct hid_go_cfg { u32 mcu_version_product; u32 mcu_version_protocol; u32 mouse_dpi; + u8 os_mode; u8 rgb_effect; u8 rgb_en; u8 rgb_mode; @@ -166,6 +167,8 @@ enum feature_status_index { FEATURE_GAMEPAD_MODE = 0x0e, }; +#define FEATURE_OS_MODE 0x69 + enum fps_switch_status_index { FPS_STATUS_UNKNOWN, GAMEPAD, @@ -311,6 +314,23 @@ enum device_status_index { GET_HOTKEY_TRIGG_STATUS, }; +enum os_mode_cfg_index { + SET_OS_MODE = 0x09, + GET_OS_MODE, +}; + +enum os_mode_type_index { + OS_UNKNOWN, + WINDOWS, + LINUX, +}; + +static const char *const os_mode_text[] = { + [OS_UNKNOWN] = "unknown", + [WINDOWS] = "windows", + [LINUX] = "linux", +}; + static int hid_go_version_event(struct command_report *cmd_rep) { switch (cmd_rep->sub_cmd) { @@ -593,6 +613,21 @@ static int hid_go_device_status_event(struct command_report *cmd_rep) } } +static int hid_go_os_mode_cfg_event(struct command_report *cmd_rep) +{ + switch (cmd_rep->sub_cmd) { + case SET_OS_MODE: + if (cmd_rep->data[0] != 1) + return -EIO; + return 0; + case GET_OS_MODE: + drvdata.os_mode = cmd_rep->data[0]; + return 0; + default: + return -EINVAL; + }; +} + static int hid_go_set_event_return(struct command_report *cmd_rep) { if (cmd_rep->data[0] != 0) @@ -666,6 +701,9 @@ static int hid_go_raw_event(struct hid_device *hdev, struct hid_report *report, break; }; break; + case OS_MODE_DATA: + ret = hid_go_os_mode_cfg_event(cmd_rep); + break; default: goto passthrough; }; @@ -1343,6 +1381,64 @@ static ssize_t calibrate_config_options(struct device *dev, return count; } +static ssize_t os_mode_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + size_t size = 1; + int ret; + u8 val; + + ret = sysfs_match_string(os_mode_text, buf); + if (ret <= 0) + return ret; + + val = ret; + ret = mcu_property_out(drvdata.hdev, OS_MODE_DATA, FEATURE_OS_MODE, + SET_OS_MODE, USB_MCU, &val, size); + if (ret < 0) + return ret; + + drvdata.os_mode = val; + + return count; +} + +static ssize_t os_mode_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + ssize_t count = 0; + int ret; + u8 i; + + ret = mcu_property_out(drvdata.hdev, OS_MODE_DATA, FEATURE_OS_MODE, + GET_OS_MODE, USB_MCU, 0, 0); + if (ret) + return ret; + + i = drvdata.os_mode; + if (i >= ARRAY_SIZE(os_mode_text)) + return -EINVAL; + + count = sysfs_emit(buf, "%s\n", os_mode_text[i]); + + return count; +} + +static ssize_t os_mode_index_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + ssize_t count = 0; + unsigned int i; + + for (i = 1; i < ARRAY_SIZE(os_mode_text); i++) + count += sysfs_emit_at(buf, count, "%s ", os_mode_text[i]); + + if (count) + buf[count - 1] = '\n'; + + return count; +} + static int rgb_cfg_call(struct hid_device *hdev, enum mcu_command_index cmd, enum rgb_config_index index, u8 *val, size_t size) { @@ -1709,6 +1805,9 @@ static DEVICE_ATTR_RO_NAMED(gamepad_rumble_intensity_index, static DEVICE_ATTR_RW(fps_mode_dpi); static DEVICE_ATTR_RO(fps_mode_dpi_index); +static DEVICE_ATTR_RW(os_mode); +static DEVICE_ATTR_RO(os_mode_index); + static struct attribute *mcu_attrs[] = { &dev_attr_fps_mode_dpi.attr, &dev_attr_fps_mode_dpi_index.attr, @@ -1717,6 +1816,8 @@ static struct attribute *mcu_attrs[] = { &dev_attr_gamepad_mode_index.attr, &dev_attr_gamepad_rumble_intensity.attr, &dev_attr_gamepad_rumble_intensity_index.attr, + &dev_attr_os_mode.attr, + &dev_attr_os_mode_index.attr, &dev_attr_reset_mcu.attr, &dev_attr_version_firmware_mcu.attr, &dev_attr_version_gen_mcu.attr, @@ -2181,6 +2282,27 @@ static void hid_go_cfg_remove(struct hid_device *hdev) hid_set_drvdata(hdev, NULL); } +static int hid_go_cfg_reset_resume(struct hid_device *hdev) +{ + u8 os_mode = drvdata.os_mode; + int ret; + + ret = mcu_property_out(drvdata.hdev, OS_MODE_DATA, FEATURE_OS_MODE, + SET_OS_MODE, USB_MCU, &os_mode, 1); + if (ret < 0) + return ret; + + ret = mcu_property_out(drvdata.hdev, OS_MODE_DATA, FEATURE_OS_MODE, + GET_OS_MODE, USB_MCU, 0, 0); + if (ret < 0) + return ret; + + if (drvdata.os_mode != os_mode) + return -ENODEV; + + return 0; +} + static int hid_go_probe(struct hid_device *hdev, const struct hid_device_id *id) { int ret, ep; @@ -2239,6 +2361,20 @@ static void hid_go_remove(struct hid_device *hdev) } } +static int hid_go_reset_resume(struct hid_device *hdev) +{ + int ep = get_endpoint_address(hdev); + + switch (ep) { + case GO_GP_INTF_IN: + return hid_go_cfg_reset_resume(hdev); + default: + break; + } + + return 0; +} + static const struct hid_device_id hid_go_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_LEGION_GO2_XINPUT) }, @@ -2258,6 +2394,7 @@ static struct hid_driver hid_lenovo_go = { .probe = hid_go_probe, .remove = hid_go_remove, .raw_event = hid_go_raw_event, + .reset_resume = hid_go_reset_resume, }; module_hid_driver(hid_lenovo_go); -- 2.52.0