git subrepo pull --force emummc

subrepo:
  subdir:   "emummc"
  merged:   "2fc47cbb8"
upstream:
  origin:   "https://github.com/lulle2007200/emuMMC.git"
  branch:   "develop"
  commit:   "2fc47cbb8"
git-subrepo:
  version:  "0.4.9"
  origin:   "https://github.com/ingydotnet/git-subrepo.git"
  commit:   "30db3b8"

emummc/source/fatal/bdk/utils/btn.c

@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2018 naehrwert
+ * Copyright (c) 2018-2022 CTCaer
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "btn.h"
+#include <soc/i2c.h>
+#include <soc/gpio.h>
+#include <soc/timer.h>
+#include <soc/t210.h>
+#include <power/max77620.h>
+
+u8 btn_read()
+{
+	u8 res = 0;
+	if (!gpio_read(GPIO_PORT_X, GPIO_PIN_7))
+		res |= BTN_VOL_DOWN;
+	if (!gpio_read(GPIO_PORT_X, GPIO_PIN_6))
+		res |= BTN_VOL_UP;
+	// HOAG can use the GPIO. Icosa/Iowa/AULA cannot. Traces are there but they miss a resistor.
+	if (i2c_recv_byte(I2C_5, MAX77620_I2C_ADDR, MAX77620_REG_ONOFFSTAT) & MAX77620_ONOFFSTAT_EN0)
+		res |= BTN_POWER;
+	return res;
+}
+
+u8 btn_read_vol()
+{
+	u8 res = 0;
+	if (!gpio_read(GPIO_PORT_X, GPIO_PIN_7))
+		res |= BTN_VOL_DOWN;
+	if (!gpio_read(GPIO_PORT_X, GPIO_PIN_6))
+		res |= BTN_VOL_UP;
+	return res;
+}
+
+u8 btn_read_home()
+{
+	return (!gpio_read(GPIO_PORT_Y, GPIO_PIN_1)) ? BTN_HOME : 0;
+}
+
+u8 btn_wait()
+{
+	u8 res = 0, btn = btn_read();
+	bool pwr = false;
+
+	//Power button down, raise a filter.
+	if (btn & BTN_POWER)
+	{
+		pwr = true;
+		btn &= ~BTN_POWER;
+	}
+
+	do
+	{
+		res = btn_read();
+		//Power button up, remove filter.
+		if (!(res & BTN_POWER) && pwr)
+			pwr = false;
+		else if (pwr) //Power button still down.
+			res &= ~BTN_POWER;
+	} while (btn == res);
+
+	return res;
+}
+
+u8 btn_wait_timeout(u32 time_ms, u8 mask)
+{
+	u32 timeout = get_tmr_ms() + time_ms;
+	u8 res = btn_read() & mask;
+
+	while (get_tmr_ms() < timeout)
+	{
+		if (res == mask)
+			break;
+		else
+			res = btn_read() & mask;
+	};
+
+	return res;
+}
+
+u8 btn_wait_timeout_single(u32 time_ms, u8 mask)
+{
+	u8 single_button = mask & BTN_SINGLE;
+	mask &= ~BTN_SINGLE;
+
+	u32 timeout = get_tmr_ms() + time_ms;
+	u8 res = btn_read();
+
+	while (get_tmr_ms() < timeout)
+	{
+		if ((res & mask) == mask)
+		{
+			if (single_button && (res & ~mask)) // Undesired button detected.
+				res = btn_read();
+			else
+				return (res & mask);
+		}
+		else
+			res = btn_read();
+	};
+
+	// Timed out.
+	if (!single_button || !time_ms)
+		return (res & mask);
+	else
+		return 0; // Return no button press if single button requested.
+}