mirror of
https://github.com/rd-stuffs/msm-4.14.git
synced 2025-02-20 11:45:48 +08:00
ANDROID: input: Changed keyreset to act as a wrapper for keycombo.
keyreset now registers a keycombo driver that acts as the old keyreset driver acted. Change-Id: I08f5279e3a33b267571b699697f9f54508868983 Signed-off-by: Daniel Rosenberg <drosen@google.com>
This commit is contained in:
Daniel Rosenberg
Amit Pundir
parent
a90496fc81
commit
5fbc94abe3
@ -187,6 +187,7 @@ config INPUT_APMPOWER
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config INPUT_KEYRESET
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tristate "Reset key"
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depends on INPUT
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select INPUT_KEYCOMBO
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---help---
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Say Y here if you want to reboot when some keys are pressed;
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@ -1,6 +1,6 @@
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/* drivers/input/keyreset.c
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*
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* Copyright (C) 2008 Google, Inc.
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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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@ -21,200 +21,104 @@
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/syscalls.h>
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#include <linux/keycombo.h>
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struct keyreset_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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int key_down_target;
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int key_down;
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int key_up;
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int restart_disabled;
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int restart_requested;
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int (*reset_fn)(void);
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struct platform_device *pdev_child;
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};
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int restart_requested;
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static void deferred_restart(struct work_struct *dummy)
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static void do_restart(void)
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{
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restart_requested = 2;
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sys_sync();
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restart_requested = 3;
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kernel_restart(NULL);
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}
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static DECLARE_WORK(restart_work, deferred_restart);
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static void keyreset_event(struct input_handle *handle, unsigned int type,
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unsigned int code, int value)
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static void do_reset_fn(void *priv)
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{
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unsigned long flags;
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struct keyreset_state *state = handle->private;
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if (type != EV_KEY)
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return;
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if (code >= KEY_MAX)
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return;
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if (!test_bit(code, state->keybit))
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return;
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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->restart_disabled = 1;
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state->key_up++;
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} else
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state->key_up--;
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struct keyreset_state *state = priv;
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if (state->restart_requested)
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panic("keyboard reset failed, %d", state->restart_requested);
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if (state->reset_fn) {
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state->restart_requested = state->reset_fn();
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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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pr_info("keyboard reset\n");
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do_restart();
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state->restart_requested = 1;
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}
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if (state->key_down == 0 && state->key_up == 0)
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state->restart_disabled = 0;
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pr_debug("reset key changed %d %d new state %d-%d-%d\n", code, value,
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state->key_down, state->key_up, state->restart_disabled);
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if (value && !state->restart_disabled &&
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state->key_down == state->key_down_target) {
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state->restart_disabled = 1;
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if (restart_requested)
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panic("keyboard reset failed, %d", restart_requested);
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if (state->reset_fn) {
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restart_requested = state->reset_fn();
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} else {
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pr_info("keyboard reset\n");
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schedule_work(&restart_work);
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restart_requested = 1;
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}
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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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static int keyreset_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 keyreset_state *state =
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container_of(handler, struct keyreset_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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handle = kzalloc(sizeof(*handle), GFP_KERNEL);
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if (!handle)
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return -ENOMEM;
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handle->dev = dev;
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handle->handler = handler;
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handle->name = "keyreset";
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handle->private = state;
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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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ret = input_open_device(handle);
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if (ret)
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goto err_input_open_device;
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pr_info("using input dev %s for key reset\n", dev->name);
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return 0;
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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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static void keyreset_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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static const struct input_device_id keyreset_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, keyreset_ids);
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static int keyreset_probe(struct platform_device *pdev)
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{
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int ret;
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int ret = -ENOMEM;
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struct keycombo_platform_data *pdata_child;
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struct keyreset_platform_data *pdata = pdev->dev.platform_data;
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int up_size = 0, down_size = 0, size;
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int key, *keyp;
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struct keyreset_state *state;
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struct keyreset_platform_data *pdata = pdev->dev.platform_data;
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if (!pdata)
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return -EINVAL;
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state = kzalloc(sizeof(*state), GFP_KERNEL);
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state = devm_kzalloc(&pdev->dev, sizeof(*state), GFP_KERNEL);
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if (!state)
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return -ENOMEM;
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spin_lock_init(&state->lock);
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state->pdev_child = platform_device_alloc(KEYCOMBO_NAME,
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PLATFORM_DEVID_AUTO);
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if (!state->pdev_child)
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return -ENOMEM;
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state->pdev_child->dev.parent = &pdev->dev;
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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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down_size++;
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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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up_size++;
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}
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}
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if (pdata->reset_fn)
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state->reset_fn = pdata->reset_fn;
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state->input_handler.event = keyreset_event;
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state->input_handler.connect = keyreset_connect;
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state->input_handler.disconnect = keyreset_disconnect;
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state->input_handler.name = KEYRESET_NAME;
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state->input_handler.id_table = keyreset_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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size = sizeof(struct keycombo_platform_data)
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+ sizeof(int) * (down_size + 1);
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pdata_child = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
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if (!pdata_child)
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goto error;
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memcpy(pdata_child->keys_down, pdata->keys_down,
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sizeof(int) * down_size);
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if (up_size > 0) {
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pdata_child->keys_up = devm_kzalloc(&pdev->dev, up_size + 1,
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GFP_KERNEL);
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if (!pdata_child->keys_up)
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goto error;
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memcpy(pdata_child->keys_up, pdata->keys_up,
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sizeof(int) * up_size);
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if (!pdata_child->keys_up)
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goto error;
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}
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state->reset_fn = pdata->reset_fn;
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pdata_child->key_down_fn = do_reset_fn;
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pdata_child->priv = state;
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pdata_child->key_down_delay = pdata->key_down_delay;
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ret = platform_device_add_data(state->pdev_child, pdata_child, size);
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if (ret)
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goto error;
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platform_set_drvdata(pdev, state);
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return 0;
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return platform_device_add(state->pdev_child);
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error:
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platform_device_put(state->pdev_child);
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return ret;
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}
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int keyreset_remove(struct platform_device *pdev)
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{
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struct keyreset_state *state = platform_get_drvdata(pdev);
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input_unregister_handler(&state->input_handler);
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kfree(state);
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platform_device_put(state->pdev_child);
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return 0;
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}
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@ -1,7 +1,7 @@
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/*
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* include/linux/keyreset.h - platform data structure for resetkeys driver
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*
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* Copyright (C) 2008 Google, Inc.
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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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@ -21,6 +21,7 @@
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struct keyreset_platform_data {
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int (*reset_fn)(void);
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int key_down_delay;
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int *keys_up;
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int keys_down[]; /* 0 terminated */
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};
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