drivers/input/touchscreen/mediatek/tpd_button.c

/*
 * Copyright (C) 2016 MediaTek Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * 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 http://www.gnu.org/licenses/gpl-2.0.html for more details.
 */

#include "tpd.h"

/* #ifdef TPD_HAVE_BUTTON */
/* static int tpd_keys[TPD_KEY_COUNT] = TPD_KEYS; */
/* static int tpd_keys_dim[TPD_KEY_COUNT][4] = TPD_KEYS_DIM; */
static unsigned int tpd_keycnt;
static int tpd_keys[TPD_VIRTUAL_KEY_MAX] = { 0 };

static int tpd_keys_dim[TPD_VIRTUAL_KEY_MAX][4];	/* = {0}; */
static ssize_t mtk_virtual_keys_show(struct kobject *kobj,
			struct kobj_attribute *attr, char *buf)
{
	int i, j;

	for (i = 0, j = 0; i < tpd_keycnt; i++)
		j += snprintf(buf+j, PAGE_SIZE-j, "%s%s:%d:%d:%d:%d:%d%s", buf,
			     __stringify(EV_KEY), tpd_keys[i],
			     tpd_keys_dim[i][0], tpd_keys_dim[i][1],
			     tpd_keys_dim[i][2], tpd_keys_dim[i][3],
			     (i == tpd_keycnt - 1 ? "\n" : ":"));
	return j;
}

static struct kobj_attribute mtk_virtual_keys_attr = {
	.attr = {
		 .name = "virtualkeys.mtk-tpd",
		 .mode = 0644,
		 },
	.show = &mtk_virtual_keys_show,
};

static struct attribute *mtk_properties_attrs[] = {
	&mtk_virtual_keys_attr.attr,
	NULL
};

static struct attribute_group mtk_properties_attr_group = {
	.attrs = mtk_properties_attrs,
};

struct kobject *properties_kobj;

void tpd_button_init(void)
{
	int ret = 0, i = 0;
#if 0
	for (i = 0; i < TPD_VIRTUAL_KEY_MAX; i++) {
		for (j = 0; j < 4; j++)
			tpd_keys_dim[i][j] = 0;
	}
#endif
/* if((tpd->kpd=input_allocate_device())==NULL) return -ENOMEM; */
	tpd->kpd = input_allocate_device();
	/* struct input_dev kpd initialization and registration */
	tpd->kpd->name = TPD_DEVICE "-kpd";
	set_bit(EV_KEY, tpd->kpd->evbit);
	/* set_bit(EV_REL, tpd->kpd->evbit); */
	/* set_bit(EV_ABS, tpd->kpd->evbit); */
	for (i = 0; i < tpd_keycnt; i++)
		__set_bit(tpd_keys[i], tpd->kpd->keybit);
	tpd->kpd->id.bustype = BUS_HOST;
	tpd->kpd->id.vendor = 0x0001;
	tpd->kpd->id.product = 0x0001;
	tpd->kpd->id.version = 0x0100;
	if (input_register_device(tpd->kpd))
		TPD_DMESG("input_register_device failed.(kpd)\n");
	set_bit(EV_KEY, tpd->dev->evbit);
	for (i = 0; i < tpd_keycnt; i++)
		__set_bit(tpd_keys[i], tpd->dev->keybit);
	properties_kobj = kobject_create_and_add("board_properties", NULL);
	if (properties_kobj)
		ret = sysfs_create_group(properties_kobj,
				&mtk_properties_attr_group);
	if (!properties_kobj || ret)
		TPD_DEBUG("failed to create board_properties\n");
}

void tpd_button(unsigned int x, unsigned int y, unsigned int down)
{
	int i;
	bool report;

	if (down) {
		for (i = 0; i < tpd_keycnt; i++) {
			report = x >= tpd_keys_dim[i][0] -
					(tpd_keys_dim[i][2] / 2) &&
				x <= tpd_keys_dim[i][0] +
					(tpd_keys_dim[i][2] / 2) &&
				y >= tpd_keys_dim[i][1] -
					(tpd_keys_dim[i][3] / 2) &&
				y <= tpd_keys_dim[i][1] +
					(tpd_keys_dim[i][3] / 2) &&
				!(tpd->btn_state & (1 << i));

			if (report) {
				input_report_key(tpd->kpd, tpd_keys[i], 1);
				input_sync(tpd->kpd);
				tpd->btn_state |= (1 << i);
				TPD_DEBUG("press key %d (%d)\n",
						i, tpd_keys[i]);
			}
		}
	} else {
		for (i = 0; i < tpd_keycnt; i++) {
			if (tpd->btn_state & (1 << i)) {
				input_report_key(tpd->kpd, tpd_keys[i], 0);
				input_sync(tpd->kpd);
				TPD_DEBUG("release key %d (%d)\n",
						i, tpd_keys[i]);
			}
		}
		tpd->btn_state = 0;
	}
}

void tpd_button_setting(int keycnt, void *keys, void *keys_dim)
{
	tpd_keycnt = keycnt;
	memcpy(tpd_keys, keys, keycnt * 4);
	memcpy(tpd_keys_dim, keys_dim, keycnt * 4 * 4);
}

/* #endif */