[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/input/keycombo.c b/src/kernel/linux/v4.14/drivers/input/keycombo.c
new file mode 100644
index 0000000..2fba451
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/input/keycombo.c
@@ -0,0 +1,261 @@
+/* drivers/input/keycombo.c
+ *
+ * Copyright (C) 2014 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/input.h>
+#include <linux/keycombo.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+struct keycombo_state {
+ struct input_handler input_handler;
+ unsigned long keybit[BITS_TO_LONGS(KEY_CNT)];
+ unsigned long upbit[BITS_TO_LONGS(KEY_CNT)];
+ unsigned long key[BITS_TO_LONGS(KEY_CNT)];
+ spinlock_t lock;
+ struct workqueue_struct *wq;
+ int key_down_target;
+ int key_down;
+ int key_up;
+ struct delayed_work key_down_work;
+ int delay;
+ struct work_struct key_up_work;
+ void (*key_up_fn)(void *);
+ void (*key_down_fn)(void *);
+ void *priv;
+ int key_is_down;
+ struct wakeup_source combo_held_wake_source;
+ struct wakeup_source combo_up_wake_source;
+};
+
+static void do_key_down(struct work_struct *work)
+{
+ struct delayed_work *dwork = container_of(work, struct delayed_work,
+ work);
+ struct keycombo_state *state = container_of(dwork,
+ struct keycombo_state, key_down_work);
+ if (state->key_down_fn)
+ state->key_down_fn(state->priv);
+}
+
+static void do_key_up(struct work_struct *work)
+{
+ struct keycombo_state *state = container_of(work, struct keycombo_state,
+ key_up_work);
+ if (state->key_up_fn)
+ state->key_up_fn(state->priv);
+ __pm_relax(&state->combo_up_wake_source);
+}
+
+static void keycombo_event(struct input_handle *handle, unsigned int type,
+ unsigned int code, int value)
+{
+ unsigned long flags;
+ struct keycombo_state *state = handle->private;
+
+ if (type != EV_KEY)
+ return;
+
+ if (code >= KEY_MAX)
+ return;
+
+ if (!test_bit(code, state->keybit))
+ return;
+
+ spin_lock_irqsave(&state->lock, flags);
+ if (!test_bit(code, state->key) == !value)
+ goto done;
+ __change_bit(code, state->key);
+ if (test_bit(code, state->upbit)) {
+ if (value)
+ state->key_up++;
+ else
+ state->key_up--;
+ } else {
+ if (value)
+ state->key_down++;
+ else
+ state->key_down--;
+ }
+ if (state->key_down == state->key_down_target && state->key_up == 0) {
+ __pm_stay_awake(&state->combo_held_wake_source);
+ state->key_is_down = 1;
+ if (queue_delayed_work(state->wq, &state->key_down_work,
+ state->delay))
+ pr_debug("Key down work already queued!");
+ } else if (state->key_is_down) {
+ if (!cancel_delayed_work(&state->key_down_work)) {
+ __pm_stay_awake(&state->combo_up_wake_source);
+ queue_work(state->wq, &state->key_up_work);
+ }
+ __pm_relax(&state->combo_held_wake_source);
+ state->key_is_down = 0;
+ }
+done:
+ spin_unlock_irqrestore(&state->lock, flags);
+}
+
+static int keycombo_connect(struct input_handler *handler,
+ struct input_dev *dev,
+ const struct input_device_id *id)
+{
+ int i;
+ int ret;
+ struct input_handle *handle;
+ struct keycombo_state *state =
+ container_of(handler, struct keycombo_state, input_handler);
+ for (i = 0; i < KEY_MAX; i++) {
+ if (test_bit(i, state->keybit) && test_bit(i, dev->keybit))
+ break;
+ }
+ if (i == KEY_MAX)
+ return -ENODEV;
+
+ handle = kzalloc(sizeof(*handle), GFP_KERNEL);
+ if (!handle)
+ return -ENOMEM;
+
+ handle->dev = dev;
+ handle->handler = handler;
+ handle->name = KEYCOMBO_NAME;
+ handle->private = state;
+
+ ret = input_register_handle(handle);
+ if (ret)
+ goto err_input_register_handle;
+
+ ret = input_open_device(handle);
+ if (ret)
+ goto err_input_open_device;
+
+ return 0;
+
+err_input_open_device:
+ input_unregister_handle(handle);
+err_input_register_handle:
+ kfree(handle);
+ return ret;
+}
+
+static void keycombo_disconnect(struct input_handle *handle)
+{
+ input_close_device(handle);
+ input_unregister_handle(handle);
+ kfree(handle);
+}
+
+static const struct input_device_id keycombo_ids[] = {
+ {
+ .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
+ .evbit = { BIT_MASK(EV_KEY) },
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(input, keycombo_ids);
+
+static int keycombo_probe(struct platform_device *pdev)
+{
+ int ret;
+ int key, *keyp;
+ struct keycombo_state *state;
+ struct keycombo_platform_data *pdata = pdev->dev.platform_data;
+
+ if (!pdata)
+ return -EINVAL;
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return -ENOMEM;
+
+ spin_lock_init(&state->lock);
+ keyp = pdata->keys_down;
+ while ((key = *keyp++)) {
+ if (key >= KEY_MAX)
+ continue;
+ state->key_down_target++;
+ __set_bit(key, state->keybit);
+ }
+ if (pdata->keys_up) {
+ keyp = pdata->keys_up;
+ while ((key = *keyp++)) {
+ if (key >= KEY_MAX)
+ continue;
+ __set_bit(key, state->keybit);
+ __set_bit(key, state->upbit);
+ }
+ }
+
+ state->wq = alloc_ordered_workqueue("keycombo", 0);
+ if (!state->wq)
+ return -ENOMEM;
+
+ state->priv = pdata->priv;
+
+ if (pdata->key_down_fn)
+ state->key_down_fn = pdata->key_down_fn;
+ INIT_DELAYED_WORK(&state->key_down_work, do_key_down);
+
+ if (pdata->key_up_fn)
+ state->key_up_fn = pdata->key_up_fn;
+ INIT_WORK(&state->key_up_work, do_key_up);
+
+ wakeup_source_init(&state->combo_held_wake_source, "key combo");
+ wakeup_source_init(&state->combo_up_wake_source, "key combo up");
+ state->delay = msecs_to_jiffies(pdata->key_down_delay);
+
+ state->input_handler.event = keycombo_event;
+ state->input_handler.connect = keycombo_connect;
+ state->input_handler.disconnect = keycombo_disconnect;
+ state->input_handler.name = KEYCOMBO_NAME;
+ state->input_handler.id_table = keycombo_ids;
+ ret = input_register_handler(&state->input_handler);
+ if (ret) {
+ kfree(state);
+ return ret;
+ }
+ platform_set_drvdata(pdev, state);
+ return 0;
+}
+
+int keycombo_remove(struct platform_device *pdev)
+{
+ struct keycombo_state *state = platform_get_drvdata(pdev);
+ input_unregister_handler(&state->input_handler);
+ destroy_workqueue(state->wq);
+ kfree(state);
+ return 0;
+}
+
+
+struct platform_driver keycombo_driver = {
+ .driver.name = KEYCOMBO_NAME,
+ .probe = keycombo_probe,
+ .remove = keycombo_remove,
+};
+
+static int __init keycombo_init(void)
+{
+ return platform_driver_register(&keycombo_driver);
+}
+
+static void __exit keycombo_exit(void)
+{
+ return platform_driver_unregister(&keycombo_driver);
+}
+
+module_init(keycombo_init);
+module_exit(keycombo_exit);