mirror of https://github.com/OpenIPC/firmware.git
266 lines
6.8 KiB
Diff
266 lines
6.8 KiB
Diff
diff -drupN a/drivers/input/keycombo.c b/drivers/input/keycombo.c
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--- a/drivers/input/keycombo.c 1970-01-01 03:00:00.000000000 +0300
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+++ b/drivers/input/keycombo.c 2022-06-12 05:28:14.000000000 +0300
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@@ -0,0 +1,261 @@
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+/* drivers/input/keycombo.c
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+ *
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+ * Copyright (C) 2014 Google, Inc.
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+ *
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+ * This software is licensed under the terms of the GNU General Public
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+ * License version 2, as published by the Free Software Foundation, and
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+ * may be copied, distributed, and modified under those terms.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ */
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+
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+#include <linux/input.h>
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+#include <linux/keycombo.h>
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+#include <linux/module.h>
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+#include <linux/platform_device.h>
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+#include <linux/reboot.h>
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+#include <linux/sched.h>
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+#include <linux/slab.h>
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+
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+struct keycombo_state {
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+ struct input_handler input_handler;
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+ unsigned long keybit[BITS_TO_LONGS(KEY_CNT)];
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+ unsigned long upbit[BITS_TO_LONGS(KEY_CNT)];
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+ unsigned long key[BITS_TO_LONGS(KEY_CNT)];
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+ spinlock_t lock;
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+ struct workqueue_struct *wq;
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+ int key_down_target;
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+ int key_down;
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+ int key_up;
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+ struct delayed_work key_down_work;
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+ int delay;
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+ struct work_struct key_up_work;
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+ void (*key_up_fn)(void *);
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+ void (*key_down_fn)(void *);
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+ void *priv;
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+ int key_is_down;
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+ struct wakeup_source combo_held_wake_source;
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+ struct wakeup_source combo_up_wake_source;
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+};
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+
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+static void do_key_down(struct work_struct *work)
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+{
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+ struct delayed_work *dwork = container_of(work, struct delayed_work,
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+ work);
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+ struct keycombo_state *state = container_of(dwork,
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+ struct keycombo_state, key_down_work);
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+ if (state->key_down_fn)
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+ state->key_down_fn(state->priv);
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+}
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+
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+static void do_key_up(struct work_struct *work)
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+{
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+ struct keycombo_state *state = container_of(work, struct keycombo_state,
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+ key_up_work);
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+ if (state->key_up_fn)
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+ state->key_up_fn(state->priv);
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+ __pm_relax(&state->combo_up_wake_source);
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+}
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+
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+static void keycombo_event(struct input_handle *handle, unsigned int type,
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+ unsigned int code, int value)
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+{
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+ unsigned long flags;
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+ struct keycombo_state *state = handle->private;
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+
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+ if (type != EV_KEY)
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+ return;
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+
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+ if (code >= KEY_MAX)
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+ return;
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+
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+ if (!test_bit(code, state->keybit))
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+ return;
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+
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+ spin_lock_irqsave(&state->lock, flags);
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+ if (!test_bit(code, state->key) == !value)
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+ goto done;
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+ __change_bit(code, state->key);
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+ if (test_bit(code, state->upbit)) {
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+ if (value)
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+ state->key_up++;
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+ else
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+ state->key_up--;
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+ } else {
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+ if (value)
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+ state->key_down++;
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+ else
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+ state->key_down--;
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+ }
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+ if (state->key_down == state->key_down_target && state->key_up == 0) {
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+ __pm_stay_awake(&state->combo_held_wake_source);
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+ state->key_is_down = 1;
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+ if (queue_delayed_work(state->wq, &state->key_down_work,
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+ state->delay))
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+ pr_debug("Key down work already queued!");
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+ } else if (state->key_is_down) {
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+ if (!cancel_delayed_work(&state->key_down_work)) {
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+ __pm_stay_awake(&state->combo_up_wake_source);
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+ queue_work(state->wq, &state->key_up_work);
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+ }
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+ __pm_relax(&state->combo_held_wake_source);
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+ state->key_is_down = 0;
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+ }
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+done:
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+ spin_unlock_irqrestore(&state->lock, flags);
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+}
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+
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+static int keycombo_connect(struct input_handler *handler,
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+ struct input_dev *dev,
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+ const struct input_device_id *id)
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+{
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+ int i;
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+ int ret;
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+ struct input_handle *handle;
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+ struct keycombo_state *state =
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+ container_of(handler, struct keycombo_state, input_handler);
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+ for (i = 0; i < KEY_MAX; i++) {
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+ if (test_bit(i, state->keybit) && test_bit(i, dev->keybit))
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+ break;
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+ }
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+ if (i == KEY_MAX)
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+ return -ENODEV;
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+
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+ handle = kzalloc(sizeof(*handle), GFP_KERNEL);
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+ if (!handle)
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+ return -ENOMEM;
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+
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+ handle->dev = dev;
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+ handle->handler = handler;
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+ handle->name = KEYCOMBO_NAME;
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+ handle->private = state;
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+
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+ ret = input_register_handle(handle);
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+ if (ret)
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+ goto err_input_register_handle;
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+
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+ ret = input_open_device(handle);
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+ if (ret)
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+ goto err_input_open_device;
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+
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+ return 0;
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+
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+err_input_open_device:
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+ input_unregister_handle(handle);
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+err_input_register_handle:
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+ kfree(handle);
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+ return ret;
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+}
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+
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+static void keycombo_disconnect(struct input_handle *handle)
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+{
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+ input_close_device(handle);
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+ input_unregister_handle(handle);
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+ kfree(handle);
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+}
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+
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+static const struct input_device_id keycombo_ids[] = {
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+ {
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+ .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
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+ .evbit = { BIT_MASK(EV_KEY) },
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+ },
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+ { },
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+};
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+MODULE_DEVICE_TABLE(input, keycombo_ids);
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+
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+static int keycombo_probe(struct platform_device *pdev)
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+{
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+ int ret;
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+ int key, *keyp;
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+ struct keycombo_state *state;
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+ struct keycombo_platform_data *pdata = pdev->dev.platform_data;
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+
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+ if (!pdata)
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+ return -EINVAL;
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+
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+ state = kzalloc(sizeof(*state), GFP_KERNEL);
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+ if (!state)
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+ return -ENOMEM;
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+
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+ spin_lock_init(&state->lock);
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+ keyp = pdata->keys_down;
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+ while ((key = *keyp++)) {
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+ if (key >= KEY_MAX)
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+ continue;
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+ state->key_down_target++;
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+ __set_bit(key, state->keybit);
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+ }
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+ if (pdata->keys_up) {
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+ keyp = pdata->keys_up;
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+ while ((key = *keyp++)) {
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+ if (key >= KEY_MAX)
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+ continue;
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+ __set_bit(key, state->keybit);
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+ __set_bit(key, state->upbit);
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+ }
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+ }
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+
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+ state->wq = alloc_ordered_workqueue("keycombo", 0);
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+ if (!state->wq)
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+ return -ENOMEM;
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+
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+ state->priv = pdata->priv;
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+
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+ if (pdata->key_down_fn)
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+ state->key_down_fn = pdata->key_down_fn;
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+ INIT_DELAYED_WORK(&state->key_down_work, do_key_down);
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+
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+ if (pdata->key_up_fn)
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+ state->key_up_fn = pdata->key_up_fn;
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+ INIT_WORK(&state->key_up_work, do_key_up);
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+
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+ wakeup_source_init(&state->combo_held_wake_source, "key combo");
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+ wakeup_source_init(&state->combo_up_wake_source, "key combo up");
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+ state->delay = msecs_to_jiffies(pdata->key_down_delay);
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+
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+ state->input_handler.event = keycombo_event;
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+ state->input_handler.connect = keycombo_connect;
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+ state->input_handler.disconnect = keycombo_disconnect;
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+ state->input_handler.name = KEYCOMBO_NAME;
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+ state->input_handler.id_table = keycombo_ids;
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+ ret = input_register_handler(&state->input_handler);
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+ if (ret) {
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+ kfree(state);
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+ return ret;
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+ }
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+ platform_set_drvdata(pdev, state);
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+ return 0;
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+}
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+
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+int keycombo_remove(struct platform_device *pdev)
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+{
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+ struct keycombo_state *state = platform_get_drvdata(pdev);
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+ input_unregister_handler(&state->input_handler);
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+ destroy_workqueue(state->wq);
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+ kfree(state);
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+ return 0;
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+}
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+
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+
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+struct platform_driver keycombo_driver = {
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+ .driver.name = KEYCOMBO_NAME,
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+ .probe = keycombo_probe,
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+ .remove = keycombo_remove,
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+};
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+
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+static int __init keycombo_init(void)
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+{
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+ return platform_driver_register(&keycombo_driver);
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+}
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+
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+static void __exit keycombo_exit(void)
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+{
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+ return platform_driver_unregister(&keycombo_driver);
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+}
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+
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+module_init(keycombo_init);
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+module_exit(keycombo_exit);
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