spec(reimaden): add platform support kernel module
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26 changed files with 2071 additions and 0 deletions
369
spec/reimaden/ac71/events.c
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369
spec/reimaden/ac71/events.c
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// SPDX-License-Identifier: GPL-2.0
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#include "pr.h"
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#include <acpi/video.h>
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#include <dt-bindings/leds/common.h>
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#include <linux/acpi.h>
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#include <linux/init.h>
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#include <linux/input.h>
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#include <linux/input/sparse-keymap.h>
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#include <linux/leds.h>
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#include "misc.h"
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#include "pdev.h"
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#include "wmi.h"
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/* ========================================================================== */
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#define KBD_BL_LED_SUFFIX ":" LED_FUNCTION_KBD_BACKLIGHT
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/* ========================================================================== */
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static struct {
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const char *guid;
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bool handler_installed;
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} ac71_wmi_event_guids[] = {
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{ .guid = AC71_WMI_EVENT0_GUID },
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{ .guid = AC71_WMI_EVENT1_GUID },
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{ .guid = AC71_WMI_EVENT2_GUID },
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};
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static const struct key_entry ac71_wmi_hotkeys[] = {
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/* reported via keyboard controller */
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{ KE_IGNORE, 0x01, { KEY_CAPSLOCK }},
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{ KE_IGNORE, 0x02, { KEY_NUMLOCK }},
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{ KE_IGNORE, 0x03, { KEY_SCROLLLOCK }},
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/* reported via "video bus" */
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{ KE_IGNORE, 0x14, { KEY_BRIGHTNESSUP }},
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{ KE_IGNORE, 0x15, { KEY_BRIGHTNESSDOWN }},
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/* reported via keyboard controller */
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{ KE_IGNORE, 0x35, { KEY_MUTE }},
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{ KE_IGNORE, 0x36, { KEY_VOLUMEDOWN }},
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{ KE_IGNORE, 0x37, { KEY_VOLUMEUP }},
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/*
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* not reported by other means when in manual mode,
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* handled automatically when it automatic mode
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*/
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{ KE_KEY, 0xb1, { KEY_KBDILLUMDOWN }},
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{ KE_KEY, 0xb2, { KEY_KBDILLUMUP }},
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{ KE_KEY, 0xb8, { KEY_FN_ESC }},
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{ KE_END }
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};
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/* ========================================================================== */
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static struct input_dev *ac71_input_dev;
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/* ========================================================================== */
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static void toggle_fn_lock_from_event_handler(void)
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{
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int status = ac71_fn_lock_get_state();
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if (status < 0)
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return;
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/* seemingly the returned status in the WMI event handler is not the current */
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pr_info("setting Fn lock state from %d to %d\n", !status, status);
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ac71_fn_lock_set_state(status);
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}
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#if IS_ENABLED(CONFIG_LEDS_BRIGHTNESS_HW_CHANGED)
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extern struct rw_semaphore leds_list_lock;
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extern struct list_head leds_list;
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static void emit_keyboard_led_hw_changed(void)
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{
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struct led_classdev *led;
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if (down_read_killable(&leds_list_lock))
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return;
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list_for_each_entry (led, &leds_list, node) {
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size_t name_length;
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const char *suffix;
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if (!(led->flags & LED_BRIGHT_HW_CHANGED))
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continue;
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name_length = strlen(led->name);
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if (name_length < strlen(KBD_BL_LED_SUFFIX))
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continue;
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suffix = led->name + name_length - strlen(KBD_BL_LED_SUFFIX);
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if (strcmp(suffix, KBD_BL_LED_SUFFIX) == 0) {
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if (mutex_lock_interruptible(&led->led_access))
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break;
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if (led_update_brightness(led) >= 0)
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led_classdev_notify_brightness_hw_changed(led, led->brightness);
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mutex_unlock(&led->led_access);
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break;
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}
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}
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up_read(&leds_list_lock);
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}
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#endif
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static void ac71_wmi_event_d2_handler(union acpi_object *obj)
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{
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bool do_report = true;
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if (!obj || obj->type != ACPI_TYPE_INTEGER)
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return;
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switch (obj->integer.value) {
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/* caps lock */
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case 1:
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pr_info("caps lock\n");
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break;
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/* num lock */
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case 2:
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pr_info("num lock\n");
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break;
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/* scroll lock */
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case 3:
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pr_info("scroll lock\n");
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break;
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/* touchpad on */
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case 4:
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pr_info("touchpad on\n");
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break;
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/* touchpad off */
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case 5:
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pr_info("touchpad off\n");
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break;
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/* increase screen brightness */
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case 20:
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pr_info("increase screen brightness\n");
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/* do_report = !acpi_video_handles_brightness_key_presses() */
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break;
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/* decrease screen brightness */
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case 21:
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pr_info("decrease screen brightness\n");
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/* do_report = !acpi_video_handles_brightness_key_presses() */
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break;
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/* mute/unmute */
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case 53:
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pr_info("toggle mute\n");
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break;
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/* decrease volume */
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case 54:
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pr_info("decrease volume\n");
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break;
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/* increase volume */
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case 55:
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pr_info("increase volume\n");
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break;
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/* enable super key (win key) lock */
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case 64:
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pr_info("enable super key lock\n");
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break;
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/* decrease volume */
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case 65:
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pr_info("disable super key lock\n");
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break;
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/* enable/disable airplane mode */
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case 164:
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pr_info("toggle airplane mode\n");
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break;
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/* super key (win key) lock state changed */
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case 165:
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pr_info("super key lock state changed\n");
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sysfs_notify(&ac71_platform_dev->dev.kobj, NULL, "super_key_lock");
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break;
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case 166:
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pr_info("lightbar state changed\n");
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break;
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/* fan boost state changed */
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case 167:
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pr_info("fan boost state changed\n");
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break;
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/* charger unplugged/plugged in */
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case 171:
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pr_info("AC plugged/unplugged\n");
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break;
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/* perf mode button pressed */
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case 176:
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pr_info("change perf mode\n");
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/* TODO: should it be handled here? */
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break;
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/* increase keyboard backlight */
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case 177:
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pr_info("keyboard backlight decrease\n");
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/* TODO: should it be handled here? */
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break;
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/* decrease keyboard backlight */
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case 178:
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pr_info("keyboard backlight increase\n");
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/* TODO: should it be handled here? */
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break;
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/* toggle Fn lock (Fn+ESC)*/
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case 184:
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pr_info("toggle Fn lock\n");
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toggle_fn_lock_from_event_handler();
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sysfs_notify(&ac71_platform_dev->dev.kobj, NULL, "fn_lock");
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break;
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/* keyboard backlight brightness changed */
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case 240:
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pr_info("keyboard backlight changed\n");
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#if IS_ENABLED(CONFIG_LEDS_BRIGHTNESS_HW_CHANGED)
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emit_keyboard_led_hw_changed();
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#endif
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break;
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default:
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pr_warn("unknown code: %u\n", (unsigned int) obj->integer.value);
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break;
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}
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if (do_report && ac71_input_dev)
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sparse_keymap_report_event(ac71_input_dev,
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obj->integer.value, 1, true);
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}
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static void ac71_wmi_event_handler(u32 value, void *context)
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{
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struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
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union acpi_object *obj;
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acpi_status status;
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pr_info("%s(value=%#04x)\n", __func__, (unsigned int) value);
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status = wmi_get_event_data(value, &response);
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if (ACPI_FAILURE(status)) {
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pr_err("bad WMI event status: %#010x\n", (unsigned int) status);
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return;
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}
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obj = response.pointer;
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if (obj) {
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pr_info("obj->type = %d\n", (int) obj->type);
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if (obj->type == ACPI_TYPE_INTEGER) {
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pr_info("int = %u\n", (unsigned int) obj->integer.value);
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} else if (obj->type == ACPI_TYPE_STRING) {
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pr_info("string = '%s'\n", obj->string.pointer);
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} else if (obj->type == ACPI_TYPE_BUFFER) {
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uint32_t i;
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for (i = 0; i < obj->buffer.length; i++)
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pr_info("buf[%u] = %#04x\n",
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(unsigned int) i,
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(unsigned int) obj->buffer.pointer[i]);
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}
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}
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switch (value) {
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case 0xd2:
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ac71_wmi_event_d2_handler(obj);
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break;
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case 0xd1:
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case 0xd0:
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break;
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}
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kfree(obj);
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}
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static int __init setup_input_dev(void)
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{
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int err = 0;
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ac71_input_dev = input_allocate_device();
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if (!ac71_input_dev)
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return -ENOMEM;
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ac71_input_dev->name = "AC71 laptop input device";
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ac71_input_dev->phys = "ac71/input0";
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ac71_input_dev->id.bustype = BUS_HOST;
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ac71_input_dev->dev.parent = &ac71_platform_dev->dev;
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err = sparse_keymap_setup(ac71_input_dev, ac71_wmi_hotkeys, NULL);
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if (err)
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goto err_free_device;
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err = input_register_device(ac71_input_dev);
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if (err)
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goto err_free_device;
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return err;
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err_free_device:
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input_free_device(ac71_input_dev);
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ac71_input_dev = NULL;
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return err;
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}
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/* ========================================================================== */
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int __init ac71_wmi_events_setup(void)
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{
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int err = 0, i;
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(void) setup_input_dev();
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for (i = 0; i < ARRAY_SIZE(ac71_wmi_event_guids); i++) {
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const char *guid = ac71_wmi_event_guids[i].guid;
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acpi_status status =
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wmi_install_notify_handler(guid, ac71_wmi_event_handler, NULL);
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if (ACPI_FAILURE(status)) {
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pr_warn("could not install WMI notify handler for '%s': [%#010lx] %s\n",
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guid, (unsigned long) status, acpi_format_exception(status));
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} else {
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ac71_wmi_event_guids[i].handler_installed = true;
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}
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}
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return err;
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}
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void ac71_wmi_events_cleanup(void)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(ac71_wmi_event_guids); i++) {
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if (ac71_wmi_event_guids[i].handler_installed) {
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wmi_remove_notify_handler(ac71_wmi_event_guids[i].guid);
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ac71_wmi_event_guids[i].handler_installed = false;
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}
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}
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if (ac71_input_dev)
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input_unregister_device(ac71_input_dev);
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}
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