139 lines
4.4 KiB
C
139 lines
4.4 KiB
C
/****************************************************************************
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* drivers/input/ff_dummy.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <debug.h>
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#include <stdio.h>
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#include <nuttx/bits.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/input/ff.h>
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#define FF_DEVNAME_FMT "/dev/lra%d"
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#define FF_DEVNAME_MAX 32
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#define FF_EFFECT_COUNT_MAX 5
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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struct ff_dummy_dev_s
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{
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struct ff_lowerhalf_s lower;
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static int ff_dummy_haptics_upload_effect(FAR struct ff_lowerhalf_s *lower,
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FAR struct ff_effect *effect,
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FAR struct ff_effect *old)
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{
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iinfo("called: effect_id = %d \n", effect->id);
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return OK;
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}
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static int ff_dummy_haptics_playback(struct ff_lowerhalf_s *lower,
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int effect_id, int val)
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{
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iinfo("called: effect_id = %d val = %d\n", effect_id, val);
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return OK;
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}
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static int ff_dummy_haptics_erase(FAR struct ff_lowerhalf_s *lower,
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int effect_id)
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{
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iinfo("called: effect_id = %d\n", effect_id);
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return OK;
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}
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static void ff_dummy_haptics_set_gain(FAR struct ff_lowerhalf_s *lower,
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uint16_t gain)
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{
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iinfo("called: gain = %d\n", gain);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: ff_dummy_initialize
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*
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* Description:
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* This function gengrate a vibrator node under /dev/ named lran. Which
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* indicates a dummy vibrator device.
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*
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* Input Parameters:
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* devno - The user specifies device number, from 0. If the
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* devno alerady exists, -EEXIST will be returned.
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno value on failure.
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*
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****************************************************************************/
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int ff_dummy_initialize(int devno)
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{
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FAR struct ff_lowerhalf_s *lower;
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FAR struct ff_dummy_dev_s *dev;
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char path[FF_DEVNAME_MAX];
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int ret;
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dev = kmm_zalloc(sizeof(struct ff_dummy_dev_s));
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if (NULL == dev)
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{
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ierr("failed to alloc memory for ff dummy\n\n");
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return -ENOMEM;
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}
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lower = &dev->lower;
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lower->upload = ff_dummy_haptics_upload_effect;
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lower->playback = ff_dummy_haptics_playback;
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lower->set_gain = ff_dummy_haptics_set_gain;
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lower->erase = ff_dummy_haptics_erase;
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/* set dummy device capabilities */
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__set_bit(FF_CUSTOM, lower->ffbit);
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__set_bit(FF_GAIN, lower->ffbit);
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__set_bit(FF_CONSTANT, lower->ffbit);
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__set_bit(FF_PERIODIC, lower->ffbit);
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snprintf(path, FF_DEVNAME_MAX, FF_DEVNAME_FMT, devno);
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ret = ff_register(lower, path, FF_EFFECT_COUNT_MAX);
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if (ret >= 0)
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{
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return ret;
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}
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ierr("Failed to register driver:%d\n", ret);
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kmm_free(dev);
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return ret;
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}
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