145 lines
4.3 KiB
C
Executable File
145 lines
4.3 KiB
C
Executable File
/*
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* pt_mtb.c
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* Parade TrueTouch(TM) Standard Product Multi-Touch Protocol B Module.
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* For use with Parade touchscreen controllers.
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* Supported parts include:
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* TMA5XX
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* TMA448
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* TMA445A
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* TT21XXX
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* TT31XXX
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* TT4XXXX
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* TT7XXX
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* TC3XXX
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*
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* Copyright (C) 2015-2020 Parade Technologies
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2, and only version 2, as published by the
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* Free Software Foundation.
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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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* Contact Parade Technologies at www.paradetech.com <ttdrivers@paradetech.com>
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*/
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#include "pt_regs.h"
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#include <linux/input/mt.h>
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#include <linux/version.h>
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/*******************************************************************************
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* FUNCTION: pt_final_sync
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*
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* SUMMARY: Function to create SYN_REPORT
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*
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* PARAMETERS:
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* *input - pointer to input device structure
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* max_slots - max support touch number
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* mt_sync_count - current valid touch number
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* ids - bit map value
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******************************************************************************/
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static void pt_final_sync(struct input_dev *input, int max_slots,
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int mt_sync_count, unsigned long *ids)
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{
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int t;
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for (t = 0; t < max_slots; t++) {
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if (test_bit(t, ids))
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continue;
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input_mt_slot(input, t);
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input_mt_report_slot_state(input, MT_TOOL_FINGER, false);
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}
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input_sync(input);
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}
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/*******************************************************************************
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* FUNCTION: pt_input_report
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*
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* SUMMARY: Function to report coordinate information of touch point
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* protocol
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*
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* PARAMETERS:
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* *input - pointer to input device structure
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* sig - track id to allow tracking of a touch
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* t - event id to indicate an event associated with touch instance
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* type - indicate the touch object
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******************************************************************************/
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static void pt_input_report(struct input_dev *input, int sig,
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int t, int type)
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{
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input_mt_slot(input, t);
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if (type == PT_OBJ_STANDARD_FINGER || type == PT_OBJ_GLOVE)
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input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
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else if (type == PT_OBJ_STYLUS)
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input_mt_report_slot_state(input, MT_TOOL_PEN, true);
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}
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/*******************************************************************************
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* FUNCTION: pt_report_slot_liftoff
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*
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* SUMMARY: Function to report all touches are lifted
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* protocol
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*
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* PARAMETERS:
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* *md - pointer to input device structure
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* max_slots - indicate max number of touch id
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******************************************************************************/
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static void pt_report_slot_liftoff(struct pt_mt_data *md,
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int max_slots)
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{
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int t;
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if (md->num_prv_rec == 0)
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return;
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for (t = 0; t < max_slots; t++) {
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input_mt_slot(md->input, t);
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input_mt_report_slot_state(md->input,
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MT_TOOL_FINGER, false);
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}
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}
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/*******************************************************************************
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* FUNCTION: pt_input_register_device
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*
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* SUMMARY: Function to register input device
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* protocol
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*
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* PARAMETERS:
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* *input - pointer to input device structure
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* max_slots - indicate max number of touch id
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******************************************************************************/
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static int pt_input_register_device(struct input_dev *input, int max_slots)
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{
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#if (KERNEL_VERSION(3, 7, 0) <= LINUX_VERSION_CODE)
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input_mt_init_slots(input, max_slots, 0);
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#else
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input_mt_init_slots(input, max_slots);
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#endif
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return input_register_device(input);
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}
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/*******************************************************************************
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* FUNCTION: pt_init_function_ptrs
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*
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* SUMMARY: Function to init function pointer
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*
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* PARAMETERS:
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* *md - pointer to touch data structure
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******************************************************************************/
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void pt_init_function_ptrs(struct pt_mt_data *md)
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{
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md->mt_function.report_slot_liftoff = pt_report_slot_liftoff;
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md->mt_function.final_sync = pt_final_sync;
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md->mt_function.input_sync = NULL;
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md->mt_function.input_report = pt_input_report;
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md->mt_function.input_register_device = pt_input_register_device;
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}
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