exo/bpc.mitm: Add support for proper shutdown.

exosphere/rebootstub/src/i2c.h

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2018 Atmosphère-NX
+ *
+ * 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/>.
+ */
+ 
+#ifndef EXOSPHERE_REBOOTSTUB_I2C_H
+#define EXOSPHERE_REBOOTSTUB_I2C_H
+
+#include "utils.h"
+
+/* I2C_BASE = I2C4. */
+#define I2C_BASE (0x7000D000)
+
+#define MAKE_I2C_REG(ofs) (MAKE_REG32(I2C_BASE + ofs))
+
+#define I2C_I2C_CNFG_0                       MAKE_I2C_REG(0x000)
+
+#define I2C_I2C_CMD_ADDR0_0                  MAKE_I2C_REG(0x004)
+
+#define I2C_I2C_CMD_DATA1_0                  MAKE_I2C_REG(0x00C)
+
+#define I2C_I2C_STATUS_0                     MAKE_I2C_REG(0x01C)
+
+#define I2C_INTERRUPT_STATUS_REGISTER_0      MAKE_I2C_REG(0x068)
+
+#define I2C_I2C_CLK_DIVISOR_REGISTER_0       MAKE_I2C_REG(0x06C)
+
+#define I2C_I2C_BUS_CLEAR_CONFIG_0           MAKE_I2C_REG(0x084)
+
+#define I2C_I2C_BUS_CLEAR_STATUS_0           MAKE_I2C_REG(0x088)
+
+
+#define I2C_I2C_CONFIG_LOAD_0                MAKE_I2C_REG(0x08C)
+
+void i2c_init(void);
+
+void i2c_stop_rtc_alarm(void);
+void i2c_send_shutdown_cmd(void);
+
+#endif