121 lines
3.3 KiB
C
Executable File
121 lines
3.3 KiB
C
Executable File
/*---------------------------------------------------------------------------------------------------------
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* kernel/include/linux/goodix_queue.h
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*
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* Copyright(c) 2010 Goodix Technology Corp. All rights reserved.
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* Author: Eltonny
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* Date: 2010.11.11
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*
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*---------------------------------------------------------------------------------------------------------*/
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/* 用于管理手指序列的伪队列操作函数，
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* 适用于Goodix的Guitar小屏驱动
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* 调整手指上报顺序以避免出现手指ID交换现象
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* 在大屏驱动中，该功能将被调整
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*/
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#ifndef _LINUX_GOODIX_QUEUE_H
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#define _LINUX_GOODIX_QUEUE_H
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#include <linux/goodix_touch.h>
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struct point_node
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{
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uint8_t num;
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uint8_t state;
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uint8_t pressure;
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unsigned int x;
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unsigned int y;
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};
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struct point_queue
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{
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int length;
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struct point_node pointer[MAX_FINGER_NUM];
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};
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/*******************************************************
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功能：
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删除手指队列中松键的手指
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参数：
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point_list
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********************************************************/
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static void del_point(struct point_queue *point_list)
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{
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int count = point_list->length-1;
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int position;
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for(; count >= 0; count--) //note: must search from tail to head
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if(point_list->pointer[count].state == FLAG_UP)
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{
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if(point_list->length == 0 )
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return ;
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position = count;
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for(; position < MAX_FINGER_NUM -1; position++)
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point_list->pointer[position] = point_list->pointer[position+1];
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point_list->length--;
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}
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}
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/*******************************************************
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功能：
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在队列尾中加入新增的手指
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参数：
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point_list
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num：手指标号
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return：
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是否成功增加手指
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********************************************************/
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static int add_point(struct point_queue *point_list, int num)
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{
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if(point_list->length >= MAX_FINGER_NUM || num < 0 )
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return -1;
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point_list->pointer[point_list->length].num = num;
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point_list->pointer[point_list->length].state = FLAG_DOWN;
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point_list->length++;
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return 0;
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}
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/*******************************************************
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功能：
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查找指定标号的手指位置
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参数：
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point_list
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num：手指标号
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return：
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返回找到的手指在队列中的位置
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********************************************************/
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static int search_point(struct point_queue *point_list, int num)
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{
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int count = 0;
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if(point_list->length <= 0 || num < 0 || num > MAX_FINGER_NUM)
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return -1; //no data
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for(; count < point_list->length; count++)
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if(point_list->pointer[count].num == num)
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return count;
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else continue;
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return -1;
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}
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/*******************************************************
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功能：
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查找松键的手指并设置标志位为FLAG_UP
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参数：
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point_list
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num：手指标号
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return：
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是否成功设置手指标志位
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********************************************************/
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static int set_up_point(struct point_queue *point_list, int num)
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{
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int number = 0;
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if(point_list->length <= 0 || num < 0 || num > MAX_FINGER_NUM)
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return -1; //no data
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number = search_point(point_list, num);
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if(num >= 0)
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{
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point_list->pointer[number].state = FLAG_UP;
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return 0;
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}
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return -1;
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}
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#endif /* _LINUX_GOODIX_QUEUE_H */
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