diff options
Diffstat (limited to 'drivers/platform/x86/lenovo-yogabook.c')
| -rw-r--r-- | drivers/platform/x86/lenovo-yogabook.c | 573 |
1 files changed, 0 insertions, 573 deletions
diff --git a/drivers/platform/x86/lenovo-yogabook.c b/drivers/platform/x86/lenovo-yogabook.c deleted file mode 100644 index 31b298dc5046..000000000000 --- a/drivers/platform/x86/lenovo-yogabook.c +++ /dev/null @@ -1,573 +0,0 @@ -// 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_might_sleep(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 = 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"); |