diff options
Diffstat (limited to 'drivers/platform/x86/lenovo-ymc.c')
| -rw-r--r-- | drivers/platform/x86/lenovo-ymc.c | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/drivers/platform/x86/lenovo-ymc.c b/drivers/platform/x86/lenovo-ymc.c deleted file mode 100644 index e1fbc35504d4..000000000000 --- a/drivers/platform/x86/lenovo-ymc.c +++ /dev/null @@ -1,219 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * lenovo-ymc.c - Lenovo Yoga Mode Control driver - * - * Copyright © 2022 Gergo Koteles <soyer@irl.hu> - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/acpi.h> -#include <linux/dmi.h> -#include <linux/input.h> -#include <linux/input/sparse-keymap.h> -#include <linux/wmi.h> -#include "ideapad-laptop.h" - -#define LENOVO_YMC_EVENT_GUID "06129D99-6083-4164-81AD-F092F9D773A6" -#define LENOVO_YMC_QUERY_GUID "09B0EE6E-C3FD-4243-8DA1-7911FF80BB8C" - -#define LENOVO_YMC_QUERY_INSTANCE 0 -#define LENOVO_YMC_QUERY_METHOD 0x01 - -static bool ec_trigger __read_mostly; -module_param(ec_trigger, bool, 0444); -MODULE_PARM_DESC(ec_trigger, "Enable EC triggering work-around to force emitting tablet mode events"); - -static bool force; -module_param(force, bool, 0444); -MODULE_PARM_DESC(force, "Force loading on boards without a convertible DMI chassis-type"); - -static const struct dmi_system_id ec_trigger_quirk_dmi_table[] = { - { - /* Lenovo Yoga 7 14ARB7 */ - .matches = { - DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), - DMI_MATCH(DMI_PRODUCT_NAME, "82QF"), - }, - }, - { - /* Lenovo Yoga 7 14ACN6 */ - .matches = { - DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), - DMI_MATCH(DMI_PRODUCT_NAME, "82N7"), - }, - }, - { } -}; - -static const struct dmi_system_id allowed_chasis_types_dmi_table[] = { - { - .matches = { - DMI_EXACT_MATCH(DMI_CHASSIS_TYPE, "31" /* Convertible */), - }, - }, - { - .matches = { - DMI_EXACT_MATCH(DMI_CHASSIS_TYPE, "32" /* Detachable */), - }, - }, - { } -}; - -struct lenovo_ymc_private { - struct input_dev *input_dev; - struct acpi_device *ec_acpi_dev; -}; - -static void lenovo_ymc_trigger_ec(struct wmi_device *wdev, struct lenovo_ymc_private *priv) -{ - int err; - - if (!priv->ec_acpi_dev) - return; - - err = write_ec_cmd(priv->ec_acpi_dev->handle, VPCCMD_W_YMC, 1); - if (err) - dev_warn(&wdev->dev, "Could not write YMC: %d\n", err); -} - -static const struct key_entry lenovo_ymc_keymap[] = { - /* Laptop */ - { KE_SW, 0x01, { .sw = { SW_TABLET_MODE, 0 } } }, - /* Tablet */ - { KE_SW, 0x02, { .sw = { SW_TABLET_MODE, 1 } } }, - /* Drawing Board */ - { KE_SW, 0x03, { .sw = { SW_TABLET_MODE, 1 } } }, - /* Tent */ - { KE_SW, 0x04, { .sw = { SW_TABLET_MODE, 1 } } }, - { KE_END }, -}; - -static void lenovo_ymc_notify(struct wmi_device *wdev, union acpi_object *data) -{ - struct lenovo_ymc_private *priv = dev_get_drvdata(&wdev->dev); - u32 input_val = 0; - struct acpi_buffer input = { sizeof(input_val), &input_val }; - struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; - union acpi_object *obj; - acpi_status status; - int code; - - status = wmi_evaluate_method(LENOVO_YMC_QUERY_GUID, - LENOVO_YMC_QUERY_INSTANCE, - LENOVO_YMC_QUERY_METHOD, - &input, &output); - - if (ACPI_FAILURE(status)) { - dev_warn(&wdev->dev, - "Failed to evaluate query method: %s\n", - acpi_format_exception(status)); - return; - } - - obj = output.pointer; - - if (obj->type != ACPI_TYPE_INTEGER) { - dev_warn(&wdev->dev, - "WMI event data is not an integer\n"); - goto free_obj; - } - code = obj->integer.value; - - if (!sparse_keymap_report_event(priv->input_dev, code, 1, true)) - dev_warn(&wdev->dev, "Unknown key %d pressed\n", code); - -free_obj: - kfree(obj); - lenovo_ymc_trigger_ec(wdev, priv); -} - -static void acpi_dev_put_helper(void *p) { acpi_dev_put(p); } - -static int lenovo_ymc_probe(struct wmi_device *wdev, const void *ctx) -{ - struct lenovo_ymc_private *priv; - struct input_dev *input_dev; - int err; - - if (!dmi_check_system(allowed_chasis_types_dmi_table)) { - if (force) - dev_info(&wdev->dev, "Force loading Lenovo YMC support\n"); - else - return -ENODEV; - } - - ec_trigger |= dmi_check_system(ec_trigger_quirk_dmi_table); - - priv = devm_kzalloc(&wdev->dev, sizeof(*priv), GFP_KERNEL); - if (!priv) - return -ENOMEM; - - if (ec_trigger) { - pr_debug("Lenovo YMC enable EC triggering.\n"); - priv->ec_acpi_dev = acpi_dev_get_first_match_dev("VPC2004", NULL, -1); - - if (!priv->ec_acpi_dev) { - dev_err(&wdev->dev, "Could not find EC ACPI device.\n"); - return -ENODEV; - } - err = devm_add_action_or_reset(&wdev->dev, - acpi_dev_put_helper, priv->ec_acpi_dev); - if (err) { - dev_err(&wdev->dev, - "Could not clean up EC ACPI device: %d\n", err); - return err; - } - } - - input_dev = devm_input_allocate_device(&wdev->dev); - if (!input_dev) - return -ENOMEM; - - input_dev->name = "Lenovo Yoga Tablet Mode Control switch"; - input_dev->phys = LENOVO_YMC_EVENT_GUID "/input0"; - input_dev->id.bustype = BUS_HOST; - input_dev->dev.parent = &wdev->dev; - err = sparse_keymap_setup(input_dev, lenovo_ymc_keymap, NULL); - if (err) { - dev_err(&wdev->dev, - "Could not set up input device keymap: %d\n", err); - return err; - } - - err = input_register_device(input_dev); - if (err) { - dev_err(&wdev->dev, - "Could not register input device: %d\n", err); - return err; - } - - priv->input_dev = input_dev; - dev_set_drvdata(&wdev->dev, priv); - - /* Report the state for the first time on probe */ - lenovo_ymc_trigger_ec(wdev, priv); - lenovo_ymc_notify(wdev, NULL); - return 0; -} - -static const struct wmi_device_id lenovo_ymc_wmi_id_table[] = { - { .guid_string = LENOVO_YMC_EVENT_GUID }, - { } -}; -MODULE_DEVICE_TABLE(wmi, lenovo_ymc_wmi_id_table); - -static struct wmi_driver lenovo_ymc_driver = { - .driver = { - .name = "lenovo-ymc", - }, - .id_table = lenovo_ymc_wmi_id_table, - .probe = lenovo_ymc_probe, - .notify = lenovo_ymc_notify, -}; - -module_wmi_driver(lenovo_ymc_driver); - -MODULE_AUTHOR("Gergo Koteles <soyer@irl.hu>"); -MODULE_DESCRIPTION("Lenovo Yoga Mode Control driver"); -MODULE_LICENSE("GPL"); |