To compile this driver as a module, choose M here: the module will
be called gigabyte-wmi.
-config YOGABOOK_WMI
- tristate "Lenovo Yoga Book tablet WMI key driver"
+config YOGABOOK
+ tristate "Lenovo Yoga Book tablet key driver"
depends on ACPI_WMI
depends on INPUT
select LEDS_CLASS
control on the Lenovo Yoga Book tablets.
To compile this driver as a module, choose M here: the module will
- be called lenovo-yogabook-wmi.
+ be called lenovo-yogabook.
config ACERHDF
tristate "Acer Aspire One temperature and fan driver"
obj-$(CONFIG_NVIDIA_WMI_EC_BACKLIGHT) += nvidia-wmi-ec-backlight.o
obj-$(CONFIG_XIAOMI_WMI) += xiaomi-wmi.o
obj-$(CONFIG_GIGABYTE_WMI) += gigabyte-wmi.o
-obj-$(CONFIG_YOGABOOK_WMI) += lenovo-yogabook-wmi.o
# Acer
obj-$(CONFIG_ACERHDF) += acerhdf.o
obj-$(CONFIG_SENSORS_HDAPS) += hdaps.o
obj-$(CONFIG_THINKPAD_ACPI) += thinkpad_acpi.o
obj-$(CONFIG_THINKPAD_LMI) += think-lmi.o
+obj-$(CONFIG_YOGABOOK) += lenovo-yogabook.o
# Intel
obj-y += intel/
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Platform driver for Lenovo Yoga Book YB1-X90F/L tablets (Android model)
- * WMI driver for Lenovo Yoga Book YB1-X91F/L tablets (Windows model)
- *
- * The keyboard half of the YB1 models can function as both a capacitive
- * touch keyboard or as a Wacom digitizer, but not at the same time.
- *
- * This driver takes care of switching between the 2 functions.
- *
- * Copyright 2023 Hans de Goede <hansg@kernel.org>
- */
-
-#include <linux/acpi.h>
-#include <linux/gpio/consumer.h>
-#include <linux/gpio/machine.h>
-#include <linux/i2c.h>
-#include <linux/interrupt.h>
-#include <linux/leds.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/pwm.h>
-#include <linux/wmi.h>
-#include <linux/workqueue.h>
-
-#define YB_MBTN_EVENT_GUID "243FEC1D-1963-41C1-8100-06A9D82A94B4"
-
-#define YB_KBD_BL_DEFAULT 128
-#define YB_KBD_BL_MAX 255
-#define YB_KBD_BL_PWM_PERIOD 13333
-
-#define YB_PDEV_NAME "yogabook-touch-kbd-digitizer-switch"
-
-/* flags */
-enum {
- YB_KBD_IS_ON,
- YB_DIGITIZER_IS_ON,
- YB_DIGITIZER_MODE,
- YB_TABLET_MODE,
- YB_SUSPENDED,
-};
-
-struct yogabook_data {
- struct device *dev;
- struct acpi_device *kbd_adev;
- struct acpi_device *dig_adev;
- struct device *kbd_dev;
- struct device *dig_dev;
- struct led_classdev *pen_led;
- struct gpio_desc *pen_touch_event;
- struct gpio_desc *kbd_bl_led_enable;
- struct gpio_desc *backside_hall_gpio;
- struct pwm_device *kbd_bl_pwm;
- int (*set_kbd_backlight)(struct yogabook_data *data, uint8_t level);
- int pen_touch_irq;
- int backside_hall_irq;
- struct work_struct work;
- struct led_classdev kbd_bl_led;
- unsigned long flags;
- uint8_t brightness;
-};
-
-static void yogabook_work(struct work_struct *work)
-{
- struct yogabook_data *data = container_of(work, struct yogabook_data, work);
- bool kbd_on, digitizer_on;
- int r;
-
- if (test_bit(YB_SUSPENDED, &data->flags))
- return;
-
- if (test_bit(YB_TABLET_MODE, &data->flags)) {
- kbd_on = false;
- digitizer_on = false;
- } else if (test_bit(YB_DIGITIZER_MODE, &data->flags)) {
- digitizer_on = true;
- kbd_on = false;
- } else {
- kbd_on = true;
- digitizer_on = false;
- }
-
- if (!kbd_on && test_bit(YB_KBD_IS_ON, &data->flags)) {
- /*
- * Must be done before releasing the keyboard touchscreen driver,
- * so that the keyboard touchscreen dev is still in D0.
- */
- data->set_kbd_backlight(data, 0);
- device_release_driver(data->kbd_dev);
- clear_bit(YB_KBD_IS_ON, &data->flags);
- }
-
- if (!digitizer_on && test_bit(YB_DIGITIZER_IS_ON, &data->flags)) {
- led_set_brightness(data->pen_led, LED_OFF);
- device_release_driver(data->dig_dev);
- clear_bit(YB_DIGITIZER_IS_ON, &data->flags);
- }
-
- if (kbd_on && !test_bit(YB_KBD_IS_ON, &data->flags)) {
- r = device_reprobe(data->kbd_dev);
- if (r)
- dev_warn(data->dev, "Reprobe of keyboard touchscreen failed: %d\n", r);
-
- data->set_kbd_backlight(data, data->brightness);
- set_bit(YB_KBD_IS_ON, &data->flags);
- }
-
- if (digitizer_on && !test_bit(YB_DIGITIZER_IS_ON, &data->flags)) {
- r = device_reprobe(data->dig_dev);
- if (r)
- dev_warn(data->dev, "Reprobe of digitizer failed: %d\n", r);
-
- led_set_brightness(data->pen_led, LED_FULL);
- set_bit(YB_DIGITIZER_IS_ON, &data->flags);
- }
-}
-
-static void yogabook_toggle_digitizer_mode(struct yogabook_data *data)
-{
- if (test_bit(YB_SUSPENDED, &data->flags))
- return;
-
- if (test_bit(YB_DIGITIZER_MODE, &data->flags))
- clear_bit(YB_DIGITIZER_MODE, &data->flags);
- else
- set_bit(YB_DIGITIZER_MODE, &data->flags);
-
- /*
- * We are called from the ACPI core and the driver [un]binding which is
- * done also needs ACPI functions, use a workqueue to avoid deadlocking.
- */
- schedule_work(&data->work);
-}
-
-static irqreturn_t yogabook_backside_hall_irq(int irq, void *_data)
-{
- struct yogabook_data *data = _data;
-
- if (gpiod_get_value(data->backside_hall_gpio))
- set_bit(YB_TABLET_MODE, &data->flags);
- else
- clear_bit(YB_TABLET_MODE, &data->flags);
-
- schedule_work(&data->work);
-
- return IRQ_HANDLED;
-}
-
-#define kbd_led_to_yogabook(cdev) container_of(cdev, struct yogabook_data, kbd_bl_led)
-
-static enum led_brightness kbd_brightness_get(struct led_classdev *cdev)
-{
- struct yogabook_data *data = kbd_led_to_yogabook(cdev);
-
- return data->brightness;
-}
-
-static int kbd_brightness_set(struct led_classdev *cdev,
- enum led_brightness value)
-{
- struct yogabook_data *data = kbd_led_to_yogabook(cdev);
-
- if ((value < 0) || (value > YB_KBD_BL_MAX))
- return -EINVAL;
-
- data->brightness = value;
-
- if (!test_bit(YB_KBD_IS_ON, &data->flags))
- return 0;
-
- return data->set_kbd_backlight(data, data->brightness);
-}
-
-static struct gpiod_lookup_table yogabook_gpios = {
- .table = {
- GPIO_LOOKUP("INT33FF:02", 18, "backside_hall_sw", GPIO_ACTIVE_LOW),
- {}
- },
-};
-
-static struct led_lookup_data yogabook_pen_led = {
- .provider = "platform::indicator",
- .con_id = "pen-icon-led",
-};
-
-static int yogabook_probe(struct device *dev, struct yogabook_data *data,
- const char *kbd_bl_led_name)
-{
- int r;
-
- data->dev = dev;
- data->brightness = YB_KBD_BL_DEFAULT;
- set_bit(YB_KBD_IS_ON, &data->flags);
- set_bit(YB_DIGITIZER_IS_ON, &data->flags);
- INIT_WORK(&data->work, yogabook_work);
-
- yogabook_pen_led.dev_id = dev_name(dev);
- led_add_lookup(&yogabook_pen_led);
- data->pen_led = devm_led_get(dev, "pen-icon-led");
- led_remove_lookup(&yogabook_pen_led);
-
- if (IS_ERR(data->pen_led))
- return dev_err_probe(dev, PTR_ERR(data->pen_led), "Getting pen icon LED\n");
-
- yogabook_gpios.dev_id = dev_name(dev);
- gpiod_add_lookup_table(&yogabook_gpios);
- data->backside_hall_gpio = devm_gpiod_get(dev, "backside_hall_sw", GPIOD_IN);
- gpiod_remove_lookup_table(&yogabook_gpios);
-
- if (IS_ERR(data->backside_hall_gpio))
- return dev_err_probe(dev, PTR_ERR(data->backside_hall_gpio),
- "Getting backside_hall_sw GPIO\n");
-
- r = gpiod_to_irq(data->backside_hall_gpio);
- if (r < 0)
- return dev_err_probe(dev, r, "Getting backside_hall_sw IRQ\n");
-
- data->backside_hall_irq = r;
-
- /* Set default brightness before enabling the IRQ */
- data->set_kbd_backlight(data, YB_KBD_BL_DEFAULT);
-
- r = request_irq(data->backside_hall_irq, yogabook_backside_hall_irq,
- IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
- "backside_hall_sw", data);
- if (r)
- return dev_err_probe(dev, r, "Requesting backside_hall_sw IRQ\n");
-
- schedule_work(&data->work);
-
- data->kbd_bl_led.name = kbd_bl_led_name;
- data->kbd_bl_led.brightness_set_blocking = kbd_brightness_set;
- data->kbd_bl_led.brightness_get = kbd_brightness_get;
- data->kbd_bl_led.max_brightness = YB_KBD_BL_MAX;
-
- r = devm_led_classdev_register(dev, &data->kbd_bl_led);
- if (r < 0) {
- dev_err_probe(dev, r, "Registering backlight LED device\n");
- goto error_free_irq;
- }
-
- dev_set_drvdata(dev, data);
- return 0;
-
-error_free_irq:
- free_irq(data->backside_hall_irq, data);
- cancel_work_sync(&data->work);
- return r;
-}
-
-static void yogabook_remove(struct yogabook_data *data)
-{
- int r = 0;
-
- free_irq(data->backside_hall_irq, data);
- cancel_work_sync(&data->work);
-
- if (!test_bit(YB_KBD_IS_ON, &data->flags))
- r |= device_reprobe(data->kbd_dev);
-
- if (!test_bit(YB_DIGITIZER_IS_ON, &data->flags))
- r |= device_reprobe(data->dig_dev);
-
- if (r)
- dev_warn(data->dev, "Reprobe of devices failed\n");
-}
-
-static int yogabook_suspend(struct device *dev)
-{
- struct yogabook_data *data = dev_get_drvdata(dev);
-
- set_bit(YB_SUSPENDED, &data->flags);
- flush_work(&data->work);
-
- if (test_bit(YB_KBD_IS_ON, &data->flags))
- data->set_kbd_backlight(data, 0);
-
- return 0;
-}
-
-static int yogabook_resume(struct device *dev)
-{
- struct yogabook_data *data = dev_get_drvdata(dev);
-
- if (test_bit(YB_KBD_IS_ON, &data->flags))
- data->set_kbd_backlight(data, data->brightness);
-
- clear_bit(YB_SUSPENDED, &data->flags);
-
- /* Check for YB_TABLET_MODE changes made during suspend */
- schedule_work(&data->work);
-
- return 0;
-}
-
-static DEFINE_SIMPLE_DEV_PM_OPS(yogabook_pm_ops, yogabook_suspend, yogabook_resume);
-
-/********** WMI driver code **********/
-
-/*
- * To control keyboard backlight, call the method KBLC() of the TCS1 ACPI
- * device (Goodix touchpad acts as virtual sensor keyboard).
- */
-static int yogabook_wmi_set_kbd_backlight(struct yogabook_data *data,
- uint8_t level)
-{
- struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
- struct acpi_object_list input;
- union acpi_object param;
- acpi_status status;
-
- dev_dbg(data->dev, "Set KBLC level to %u\n", level);
-
- /* Ensure keyboard touchpad is on before we call KBLC() */
- acpi_device_set_power(data->kbd_adev, ACPI_STATE_D0);
-
- input.count = 1;
- input.pointer = ¶m;
-
- param.type = ACPI_TYPE_INTEGER;
- param.integer.value = YB_KBD_BL_MAX - level;
-
- status = acpi_evaluate_object(acpi_device_handle(data->kbd_adev), "KBLC",
- &input, &output);
- if (ACPI_FAILURE(status)) {
- dev_err(data->dev, "Failed to call KBLC method: 0x%x\n", status);
- return status;
- }
-
- kfree(output.pointer);
- return 0;
-}
-
-static int yogabook_wmi_probe(struct wmi_device *wdev, const void *context)
-{
- struct device *dev = &wdev->dev;
- struct yogabook_data *data;
- int r;
-
- data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
- if (data == NULL)
- return -ENOMEM;
-
- data->kbd_adev = acpi_dev_get_first_match_dev("GDIX1001", NULL, -1);
- if (!data->kbd_adev)
- return dev_err_probe(dev, -ENODEV, "Cannot find the touchpad device in ACPI tables\n");
-
- data->dig_adev = acpi_dev_get_first_match_dev("WCOM0019", NULL, -1);
- if (!data->dig_adev) {
- r = dev_err_probe(dev, -ENODEV, "Cannot find the digitizer device in ACPI tables\n");
- goto error_put_devs;
- }
-
- data->kbd_dev = get_device(acpi_get_first_physical_node(data->kbd_adev));
- if (!data->kbd_dev || !data->kbd_dev->driver) {
- r = -EPROBE_DEFER;
- goto error_put_devs;
- }
-
- data->dig_dev = get_device(acpi_get_first_physical_node(data->dig_adev));
- if (!data->dig_dev || !data->dig_dev->driver) {
- r = -EPROBE_DEFER;
- goto error_put_devs;
- }
-
- data->set_kbd_backlight = yogabook_wmi_set_kbd_backlight;
-
- r = yogabook_probe(dev, data, "ybwmi::kbd_backlight");
- if (r)
- goto error_put_devs;
-
- return 0;
-
-error_put_devs:
- put_device(data->dig_dev);
- put_device(data->kbd_dev);
- acpi_dev_put(data->dig_adev);
- acpi_dev_put(data->kbd_adev);
- return r;
-}
-
-static void yogabook_wmi_remove(struct wmi_device *wdev)
-{
- struct yogabook_data *data = dev_get_drvdata(&wdev->dev);
-
- yogabook_remove(data);
-
- put_device(data->dig_dev);
- put_device(data->kbd_dev);
- acpi_dev_put(data->dig_adev);
- acpi_dev_put(data->kbd_adev);
-}
-
-static void yogabook_wmi_notify(struct wmi_device *wdev, union acpi_object *dummy)
-{
- yogabook_toggle_digitizer_mode(dev_get_drvdata(&wdev->dev));
-}
-
-static const struct wmi_device_id yogabook_wmi_id_table[] = {
- {
- .guid_string = YB_MBTN_EVENT_GUID,
- },
- { } /* Terminating entry */
-};
-MODULE_DEVICE_TABLE(wmi, yogabook_wmi_id_table);
-
-static struct wmi_driver yogabook_wmi_driver = {
- .driver = {
- .name = "yogabook-wmi",
- .pm = pm_sleep_ptr(&yogabook_pm_ops),
- },
- .no_notify_data = true,
- .id_table = yogabook_wmi_id_table,
- .probe = yogabook_wmi_probe,
- .remove = yogabook_wmi_remove,
- .notify = yogabook_wmi_notify,
-};
-
-/********** platform driver code **********/
-
-static struct gpiod_lookup_table yogabook_pdev_gpios = {
- .dev_id = YB_PDEV_NAME,
- .table = {
- GPIO_LOOKUP("INT33FF:00", 95, "pen_touch_event", GPIO_ACTIVE_HIGH),
- GPIO_LOOKUP("INT33FF:03", 52, "enable_keyboard_led", GPIO_ACTIVE_HIGH),
- {}
- },
-};
-
-static int yogabook_pdev_set_kbd_backlight(struct yogabook_data *data, u8 level)
-{
- struct pwm_state state = {
- .period = YB_KBD_BL_PWM_PERIOD,
- .duty_cycle = YB_KBD_BL_PWM_PERIOD * level / YB_KBD_BL_MAX,
- .enabled = level,
- };
-
- pwm_apply_state(data->kbd_bl_pwm, &state);
- gpiod_set_value(data->kbd_bl_led_enable, level ? 1 : 0);
- return 0;
-}
-
-static irqreturn_t yogabook_pen_touch_irq(int irq, void *data)
-{
- yogabook_toggle_digitizer_mode(data);
- return IRQ_HANDLED;
-}
-
-static int yogabook_pdev_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct yogabook_data *data;
- int r;
-
- data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
- if (data == NULL)
- return -ENOMEM;
-
- data->kbd_dev = bus_find_device_by_name(&i2c_bus_type, NULL, "i2c-goodix_ts");
- if (!data->kbd_dev || !data->kbd_dev->driver) {
- r = -EPROBE_DEFER;
- goto error_put_devs;
- }
-
- data->dig_dev = bus_find_device_by_name(&i2c_bus_type, NULL, "i2c-wacom");
- if (!data->dig_dev || !data->dig_dev->driver) {
- r = -EPROBE_DEFER;
- goto error_put_devs;
- }
-
- gpiod_add_lookup_table(&yogabook_pdev_gpios);
- data->pen_touch_event = devm_gpiod_get(dev, "pen_touch_event", GPIOD_IN);
- data->kbd_bl_led_enable = devm_gpiod_get(dev, "enable_keyboard_led", GPIOD_OUT_HIGH);
- gpiod_remove_lookup_table(&yogabook_pdev_gpios);
-
- if (IS_ERR(data->pen_touch_event)) {
- r = dev_err_probe(dev, PTR_ERR(data->pen_touch_event),
- "Getting pen_touch_event GPIO\n");
- goto error_put_devs;
- }
-
- if (IS_ERR(data->kbd_bl_led_enable)) {
- r = dev_err_probe(dev, PTR_ERR(data->kbd_bl_led_enable),
- "Getting enable_keyboard_led GPIO\n");
- goto error_put_devs;
- }
-
- data->kbd_bl_pwm = devm_pwm_get(dev, "pwm_soc_lpss_2");
- if (IS_ERR(data->kbd_bl_pwm)) {
- r = dev_err_probe(dev, PTR_ERR(data->kbd_bl_pwm),
- "Getting keyboard backlight PWM\n");
- goto error_put_devs;
- }
-
- r = gpiod_to_irq(data->pen_touch_event);
- if (r < 0) {
- dev_err_probe(dev, r, "Getting pen_touch_event IRQ\n");
- goto error_put_devs;
- }
- data->pen_touch_irq = r;
-
- r = request_irq(data->pen_touch_irq, yogabook_pen_touch_irq, IRQF_TRIGGER_FALLING,
- "pen_touch_event", data);
- if (r) {
- dev_err_probe(dev, r, "Requesting pen_touch_event IRQ\n");
- goto error_put_devs;
- }
-
- data->set_kbd_backlight = yogabook_pdev_set_kbd_backlight;
-
- r = yogabook_probe(dev, data, "yogabook::kbd_backlight");
- if (r)
- goto error_free_irq;
-
- return 0;
-
-error_free_irq:
- free_irq(data->pen_touch_irq, data);
- cancel_work_sync(&data->work);
-error_put_devs:
- put_device(data->dig_dev);
- put_device(data->kbd_dev);
- return r;
-}
-
-static void yogabook_pdev_remove(struct platform_device *pdev)
-{
- struct yogabook_data *data = platform_get_drvdata(pdev);
-
- yogabook_remove(data);
- free_irq(data->pen_touch_irq, data);
- cancel_work_sync(&data->work);
- put_device(data->dig_dev);
- put_device(data->kbd_dev);
-}
-
-static struct platform_driver yogabook_pdev_driver = {
- .probe = yogabook_pdev_probe,
- .remove_new = yogabook_pdev_remove,
- .driver = {
- .name = YB_PDEV_NAME,
- .pm = pm_sleep_ptr(&yogabook_pm_ops),
- },
-};
-
-static int __init yogabook_module_init(void)
-{
- int r;
-
- r = wmi_driver_register(&yogabook_wmi_driver);
- if (r)
- return r;
-
- r = platform_driver_register(&yogabook_pdev_driver);
- if (r)
- wmi_driver_unregister(&yogabook_wmi_driver);
-
- return r;
-}
-
-static void __exit yogabook_module_exit(void)
-{
- platform_driver_unregister(&yogabook_pdev_driver);
- wmi_driver_unregister(&yogabook_wmi_driver);
-}
-
-module_init(yogabook_module_init);
-module_exit(yogabook_module_exit);
-
-MODULE_ALIAS("platform:" YB_PDEV_NAME);
-MODULE_AUTHOR("Yauhen Kharuzhy");
-MODULE_DESCRIPTION("Lenovo Yoga Book driver");
-MODULE_LICENSE("GPL v2");
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Platform driver for Lenovo Yoga Book YB1-X90F/L tablets (Android model)
+ * WMI driver for Lenovo Yoga Book YB1-X91F/L tablets (Windows model)
+ *
+ * The keyboard half of the YB1 models can function as both a capacitive
+ * touch keyboard or as a Wacom digitizer, but not at the same time.
+ *
+ * This driver takes care of switching between the 2 functions.
+ *
+ * Copyright 2023 Hans de Goede <hansg@kernel.org>
+ */
+
+#include <linux/acpi.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/machine.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pwm.h>
+#include <linux/wmi.h>
+#include <linux/workqueue.h>
+
+#define YB_MBTN_EVENT_GUID "243FEC1D-1963-41C1-8100-06A9D82A94B4"
+
+#define YB_KBD_BL_DEFAULT 128
+#define YB_KBD_BL_MAX 255
+#define YB_KBD_BL_PWM_PERIOD 13333
+
+#define YB_PDEV_NAME "yogabook-touch-kbd-digitizer-switch"
+
+/* flags */
+enum {
+ YB_KBD_IS_ON,
+ YB_DIGITIZER_IS_ON,
+ YB_DIGITIZER_MODE,
+ YB_TABLET_MODE,
+ YB_SUSPENDED,
+};
+
+struct yogabook_data {
+ struct device *dev;
+ struct acpi_device *kbd_adev;
+ struct acpi_device *dig_adev;
+ struct device *kbd_dev;
+ struct device *dig_dev;
+ struct led_classdev *pen_led;
+ struct gpio_desc *pen_touch_event;
+ struct gpio_desc *kbd_bl_led_enable;
+ struct gpio_desc *backside_hall_gpio;
+ struct pwm_device *kbd_bl_pwm;
+ int (*set_kbd_backlight)(struct yogabook_data *data, uint8_t level);
+ int pen_touch_irq;
+ int backside_hall_irq;
+ struct work_struct work;
+ struct led_classdev kbd_bl_led;
+ unsigned long flags;
+ uint8_t brightness;
+};
+
+static void yogabook_work(struct work_struct *work)
+{
+ struct yogabook_data *data = container_of(work, struct yogabook_data, work);
+ bool kbd_on, digitizer_on;
+ int r;
+
+ if (test_bit(YB_SUSPENDED, &data->flags))
+ return;
+
+ if (test_bit(YB_TABLET_MODE, &data->flags)) {
+ kbd_on = false;
+ digitizer_on = false;
+ } else if (test_bit(YB_DIGITIZER_MODE, &data->flags)) {
+ digitizer_on = true;
+ kbd_on = false;
+ } else {
+ kbd_on = true;
+ digitizer_on = false;
+ }
+
+ if (!kbd_on && test_bit(YB_KBD_IS_ON, &data->flags)) {
+ /*
+ * Must be done before releasing the keyboard touchscreen driver,
+ * so that the keyboard touchscreen dev is still in D0.
+ */
+ data->set_kbd_backlight(data, 0);
+ device_release_driver(data->kbd_dev);
+ clear_bit(YB_KBD_IS_ON, &data->flags);
+ }
+
+ if (!digitizer_on && test_bit(YB_DIGITIZER_IS_ON, &data->flags)) {
+ led_set_brightness(data->pen_led, LED_OFF);
+ device_release_driver(data->dig_dev);
+ clear_bit(YB_DIGITIZER_IS_ON, &data->flags);
+ }
+
+ if (kbd_on && !test_bit(YB_KBD_IS_ON, &data->flags)) {
+ r = device_reprobe(data->kbd_dev);
+ if (r)
+ dev_warn(data->dev, "Reprobe of keyboard touchscreen failed: %d\n", r);
+
+ data->set_kbd_backlight(data, data->brightness);
+ set_bit(YB_KBD_IS_ON, &data->flags);
+ }
+
+ if (digitizer_on && !test_bit(YB_DIGITIZER_IS_ON, &data->flags)) {
+ r = device_reprobe(data->dig_dev);
+ if (r)
+ dev_warn(data->dev, "Reprobe of digitizer failed: %d\n", r);
+
+ led_set_brightness(data->pen_led, LED_FULL);
+ set_bit(YB_DIGITIZER_IS_ON, &data->flags);
+ }
+}
+
+static void yogabook_toggle_digitizer_mode(struct yogabook_data *data)
+{
+ if (test_bit(YB_SUSPENDED, &data->flags))
+ return;
+
+ if (test_bit(YB_DIGITIZER_MODE, &data->flags))
+ clear_bit(YB_DIGITIZER_MODE, &data->flags);
+ else
+ set_bit(YB_DIGITIZER_MODE, &data->flags);
+
+ /*
+ * We are called from the ACPI core and the driver [un]binding which is
+ * done also needs ACPI functions, use a workqueue to avoid deadlocking.
+ */
+ schedule_work(&data->work);
+}
+
+static irqreturn_t yogabook_backside_hall_irq(int irq, void *_data)
+{
+ struct yogabook_data *data = _data;
+
+ if (gpiod_get_value(data->backside_hall_gpio))
+ set_bit(YB_TABLET_MODE, &data->flags);
+ else
+ clear_bit(YB_TABLET_MODE, &data->flags);
+
+ schedule_work(&data->work);
+
+ return IRQ_HANDLED;
+}
+
+#define kbd_led_to_yogabook(cdev) container_of(cdev, struct yogabook_data, kbd_bl_led)
+
+static enum led_brightness kbd_brightness_get(struct led_classdev *cdev)
+{
+ struct yogabook_data *data = kbd_led_to_yogabook(cdev);
+
+ return data->brightness;
+}
+
+static int kbd_brightness_set(struct led_classdev *cdev,
+ enum led_brightness value)
+{
+ struct yogabook_data *data = kbd_led_to_yogabook(cdev);
+
+ if ((value < 0) || (value > YB_KBD_BL_MAX))
+ return -EINVAL;
+
+ data->brightness = value;
+
+ if (!test_bit(YB_KBD_IS_ON, &data->flags))
+ return 0;
+
+ return data->set_kbd_backlight(data, data->brightness);
+}
+
+static struct gpiod_lookup_table yogabook_gpios = {
+ .table = {
+ GPIO_LOOKUP("INT33FF:02", 18, "backside_hall_sw", GPIO_ACTIVE_LOW),
+ {}
+ },
+};
+
+static struct led_lookup_data yogabook_pen_led = {
+ .provider = "platform::indicator",
+ .con_id = "pen-icon-led",
+};
+
+static int yogabook_probe(struct device *dev, struct yogabook_data *data,
+ const char *kbd_bl_led_name)
+{
+ int r;
+
+ data->dev = dev;
+ data->brightness = YB_KBD_BL_DEFAULT;
+ set_bit(YB_KBD_IS_ON, &data->flags);
+ set_bit(YB_DIGITIZER_IS_ON, &data->flags);
+ INIT_WORK(&data->work, yogabook_work);
+
+ yogabook_pen_led.dev_id = dev_name(dev);
+ led_add_lookup(&yogabook_pen_led);
+ data->pen_led = devm_led_get(dev, "pen-icon-led");
+ led_remove_lookup(&yogabook_pen_led);
+
+ if (IS_ERR(data->pen_led))
+ return dev_err_probe(dev, PTR_ERR(data->pen_led), "Getting pen icon LED\n");
+
+ yogabook_gpios.dev_id = dev_name(dev);
+ gpiod_add_lookup_table(&yogabook_gpios);
+ data->backside_hall_gpio = devm_gpiod_get(dev, "backside_hall_sw", GPIOD_IN);
+ gpiod_remove_lookup_table(&yogabook_gpios);
+
+ if (IS_ERR(data->backside_hall_gpio))
+ return dev_err_probe(dev, PTR_ERR(data->backside_hall_gpio),
+ "Getting backside_hall_sw GPIO\n");
+
+ r = gpiod_to_irq(data->backside_hall_gpio);
+ if (r < 0)
+ return dev_err_probe(dev, r, "Getting backside_hall_sw IRQ\n");
+
+ data->backside_hall_irq = r;
+
+ /* Set default brightness before enabling the IRQ */
+ data->set_kbd_backlight(data, YB_KBD_BL_DEFAULT);
+
+ r = request_irq(data->backside_hall_irq, yogabook_backside_hall_irq,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ "backside_hall_sw", data);
+ if (r)
+ return dev_err_probe(dev, r, "Requesting backside_hall_sw IRQ\n");
+
+ schedule_work(&data->work);
+
+ data->kbd_bl_led.name = kbd_bl_led_name;
+ data->kbd_bl_led.brightness_set_blocking = kbd_brightness_set;
+ data->kbd_bl_led.brightness_get = kbd_brightness_get;
+ data->kbd_bl_led.max_brightness = YB_KBD_BL_MAX;
+
+ r = devm_led_classdev_register(dev, &data->kbd_bl_led);
+ if (r < 0) {
+ dev_err_probe(dev, r, "Registering backlight LED device\n");
+ goto error_free_irq;
+ }
+
+ dev_set_drvdata(dev, data);
+ return 0;
+
+error_free_irq:
+ free_irq(data->backside_hall_irq, data);
+ cancel_work_sync(&data->work);
+ return r;
+}
+
+static void yogabook_remove(struct yogabook_data *data)
+{
+ int r = 0;
+
+ free_irq(data->backside_hall_irq, data);
+ cancel_work_sync(&data->work);
+
+ if (!test_bit(YB_KBD_IS_ON, &data->flags))
+ r |= device_reprobe(data->kbd_dev);
+
+ if (!test_bit(YB_DIGITIZER_IS_ON, &data->flags))
+ r |= device_reprobe(data->dig_dev);
+
+ if (r)
+ dev_warn(data->dev, "Reprobe of devices failed\n");
+}
+
+static int yogabook_suspend(struct device *dev)
+{
+ struct yogabook_data *data = dev_get_drvdata(dev);
+
+ set_bit(YB_SUSPENDED, &data->flags);
+ flush_work(&data->work);
+
+ if (test_bit(YB_KBD_IS_ON, &data->flags))
+ data->set_kbd_backlight(data, 0);
+
+ return 0;
+}
+
+static int yogabook_resume(struct device *dev)
+{
+ struct yogabook_data *data = dev_get_drvdata(dev);
+
+ if (test_bit(YB_KBD_IS_ON, &data->flags))
+ data->set_kbd_backlight(data, data->brightness);
+
+ clear_bit(YB_SUSPENDED, &data->flags);
+
+ /* Check for YB_TABLET_MODE changes made during suspend */
+ schedule_work(&data->work);
+
+ return 0;
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(yogabook_pm_ops, yogabook_suspend, yogabook_resume);
+
+/********** WMI driver code **********/
+
+/*
+ * To control keyboard backlight, call the method KBLC() of the TCS1 ACPI
+ * device (Goodix touchpad acts as virtual sensor keyboard).
+ */
+static int yogabook_wmi_set_kbd_backlight(struct yogabook_data *data,
+ uint8_t level)
+{
+ struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+ struct acpi_object_list input;
+ union acpi_object param;
+ acpi_status status;
+
+ dev_dbg(data->dev, "Set KBLC level to %u\n", level);
+
+ /* Ensure keyboard touchpad is on before we call KBLC() */
+ acpi_device_set_power(data->kbd_adev, ACPI_STATE_D0);
+
+ input.count = 1;
+ input.pointer = ¶m;
+
+ param.type = ACPI_TYPE_INTEGER;
+ param.integer.value = YB_KBD_BL_MAX - level;
+
+ status = acpi_evaluate_object(acpi_device_handle(data->kbd_adev), "KBLC",
+ &input, &output);
+ if (ACPI_FAILURE(status)) {
+ dev_err(data->dev, "Failed to call KBLC method: 0x%x\n", status);
+ return status;
+ }
+
+ kfree(output.pointer);
+ return 0;
+}
+
+static int yogabook_wmi_probe(struct wmi_device *wdev, const void *context)
+{
+ struct device *dev = &wdev->dev;
+ struct yogabook_data *data;
+ int r;
+
+ data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+ if (data == NULL)
+ return -ENOMEM;
+
+ data->kbd_adev = acpi_dev_get_first_match_dev("GDIX1001", NULL, -1);
+ if (!data->kbd_adev)
+ return dev_err_probe(dev, -ENODEV, "Cannot find the touchpad device in ACPI tables\n");
+
+ data->dig_adev = acpi_dev_get_first_match_dev("WCOM0019", NULL, -1);
+ if (!data->dig_adev) {
+ r = dev_err_probe(dev, -ENODEV, "Cannot find the digitizer device in ACPI tables\n");
+ goto error_put_devs;
+ }
+
+ data->kbd_dev = get_device(acpi_get_first_physical_node(data->kbd_adev));
+ if (!data->kbd_dev || !data->kbd_dev->driver) {
+ r = -EPROBE_DEFER;
+ goto error_put_devs;
+ }
+
+ data->dig_dev = get_device(acpi_get_first_physical_node(data->dig_adev));
+ if (!data->dig_dev || !data->dig_dev->driver) {
+ r = -EPROBE_DEFER;
+ goto error_put_devs;
+ }
+
+ data->set_kbd_backlight = yogabook_wmi_set_kbd_backlight;
+
+ r = yogabook_probe(dev, data, "ybwmi::kbd_backlight");
+ if (r)
+ goto error_put_devs;
+
+ return 0;
+
+error_put_devs:
+ put_device(data->dig_dev);
+ put_device(data->kbd_dev);
+ acpi_dev_put(data->dig_adev);
+ acpi_dev_put(data->kbd_adev);
+ return r;
+}
+
+static void yogabook_wmi_remove(struct wmi_device *wdev)
+{
+ struct yogabook_data *data = dev_get_drvdata(&wdev->dev);
+
+ yogabook_remove(data);
+
+ put_device(data->dig_dev);
+ put_device(data->kbd_dev);
+ acpi_dev_put(data->dig_adev);
+ acpi_dev_put(data->kbd_adev);
+}
+
+static void yogabook_wmi_notify(struct wmi_device *wdev, union acpi_object *dummy)
+{
+ yogabook_toggle_digitizer_mode(dev_get_drvdata(&wdev->dev));
+}
+
+static const struct wmi_device_id yogabook_wmi_id_table[] = {
+ {
+ .guid_string = YB_MBTN_EVENT_GUID,
+ },
+ { } /* Terminating entry */
+};
+MODULE_DEVICE_TABLE(wmi, yogabook_wmi_id_table);
+
+static struct wmi_driver yogabook_wmi_driver = {
+ .driver = {
+ .name = "yogabook-wmi",
+ .pm = pm_sleep_ptr(&yogabook_pm_ops),
+ },
+ .no_notify_data = true,
+ .id_table = yogabook_wmi_id_table,
+ .probe = yogabook_wmi_probe,
+ .remove = yogabook_wmi_remove,
+ .notify = yogabook_wmi_notify,
+};
+
+/********** platform driver code **********/
+
+static struct gpiod_lookup_table yogabook_pdev_gpios = {
+ .dev_id = YB_PDEV_NAME,
+ .table = {
+ GPIO_LOOKUP("INT33FF:00", 95, "pen_touch_event", GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP("INT33FF:03", 52, "enable_keyboard_led", GPIO_ACTIVE_HIGH),
+ {}
+ },
+};
+
+static int yogabook_pdev_set_kbd_backlight(struct yogabook_data *data, u8 level)
+{
+ struct pwm_state state = {
+ .period = YB_KBD_BL_PWM_PERIOD,
+ .duty_cycle = YB_KBD_BL_PWM_PERIOD * level / YB_KBD_BL_MAX,
+ .enabled = level,
+ };
+
+ pwm_apply_state(data->kbd_bl_pwm, &state);
+ gpiod_set_value(data->kbd_bl_led_enable, level ? 1 : 0);
+ return 0;
+}
+
+static irqreturn_t yogabook_pen_touch_irq(int irq, void *data)
+{
+ yogabook_toggle_digitizer_mode(data);
+ return IRQ_HANDLED;
+}
+
+static int yogabook_pdev_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct yogabook_data *data;
+ int r;
+
+ data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+ if (data == NULL)
+ return -ENOMEM;
+
+ data->kbd_dev = bus_find_device_by_name(&i2c_bus_type, NULL, "i2c-goodix_ts");
+ if (!data->kbd_dev || !data->kbd_dev->driver) {
+ r = -EPROBE_DEFER;
+ goto error_put_devs;
+ }
+
+ data->dig_dev = bus_find_device_by_name(&i2c_bus_type, NULL, "i2c-wacom");
+ if (!data->dig_dev || !data->dig_dev->driver) {
+ r = -EPROBE_DEFER;
+ goto error_put_devs;
+ }
+
+ gpiod_add_lookup_table(&yogabook_pdev_gpios);
+ data->pen_touch_event = devm_gpiod_get(dev, "pen_touch_event", GPIOD_IN);
+ data->kbd_bl_led_enable = devm_gpiod_get(dev, "enable_keyboard_led", GPIOD_OUT_HIGH);
+ gpiod_remove_lookup_table(&yogabook_pdev_gpios);
+
+ if (IS_ERR(data->pen_touch_event)) {
+ r = dev_err_probe(dev, PTR_ERR(data->pen_touch_event),
+ "Getting pen_touch_event GPIO\n");
+ goto error_put_devs;
+ }
+
+ if (IS_ERR(data->kbd_bl_led_enable)) {
+ r = dev_err_probe(dev, PTR_ERR(data->kbd_bl_led_enable),
+ "Getting enable_keyboard_led GPIO\n");
+ goto error_put_devs;
+ }
+
+ data->kbd_bl_pwm = devm_pwm_get(dev, "pwm_soc_lpss_2");
+ if (IS_ERR(data->kbd_bl_pwm)) {
+ r = dev_err_probe(dev, PTR_ERR(data->kbd_bl_pwm),
+ "Getting keyboard backlight PWM\n");
+ goto error_put_devs;
+ }
+
+ r = gpiod_to_irq(data->pen_touch_event);
+ if (r < 0) {
+ dev_err_probe(dev, r, "Getting pen_touch_event IRQ\n");
+ goto error_put_devs;
+ }
+ data->pen_touch_irq = r;
+
+ r = request_irq(data->pen_touch_irq, yogabook_pen_touch_irq, IRQF_TRIGGER_FALLING,
+ "pen_touch_event", data);
+ if (r) {
+ dev_err_probe(dev, r, "Requesting pen_touch_event IRQ\n");
+ goto error_put_devs;
+ }
+
+ data->set_kbd_backlight = yogabook_pdev_set_kbd_backlight;
+
+ r = yogabook_probe(dev, data, "yogabook::kbd_backlight");
+ if (r)
+ goto error_free_irq;
+
+ return 0;
+
+error_free_irq:
+ free_irq(data->pen_touch_irq, data);
+ cancel_work_sync(&data->work);
+error_put_devs:
+ put_device(data->dig_dev);
+ put_device(data->kbd_dev);
+ return r;
+}
+
+static void yogabook_pdev_remove(struct platform_device *pdev)
+{
+ struct yogabook_data *data = platform_get_drvdata(pdev);
+
+ yogabook_remove(data);
+ free_irq(data->pen_touch_irq, data);
+ cancel_work_sync(&data->work);
+ put_device(data->dig_dev);
+ put_device(data->kbd_dev);
+}
+
+static struct platform_driver yogabook_pdev_driver = {
+ .probe = yogabook_pdev_probe,
+ .remove_new = yogabook_pdev_remove,
+ .driver = {
+ .name = YB_PDEV_NAME,
+ .pm = pm_sleep_ptr(&yogabook_pm_ops),
+ },
+};
+
+static int __init yogabook_module_init(void)
+{
+ int r;
+
+ r = wmi_driver_register(&yogabook_wmi_driver);
+ if (r)
+ return r;
+
+ r = platform_driver_register(&yogabook_pdev_driver);
+ if (r)
+ wmi_driver_unregister(&yogabook_wmi_driver);
+
+ return r;
+}
+
+static void __exit yogabook_module_exit(void)
+{
+ platform_driver_unregister(&yogabook_pdev_driver);
+ wmi_driver_unregister(&yogabook_wmi_driver);
+}
+
+module_init(yogabook_module_init);
+module_exit(yogabook_module_exit);
+
+MODULE_ALIAS("platform:" YB_PDEV_NAME);
+MODULE_AUTHOR("Yauhen Kharuzhy");
+MODULE_DESCRIPTION("Lenovo Yoga Book driver");
+MODULE_LICENSE("GPL v2");
projects / platform / kernel / linux-starfive.git / commitdiff