/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2013 secunet Security Networks AG
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * 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 the
 * GNU General Public License for more details.
 */

#ifdef IT8516E_FIRST_DATA
Device (PM1) {
	Name (_HID, EisaId("PNP0C02"))
	Name (_STR, Unicode("IT8516E PM Channel 1"))
	Name (_UID, SUPERIO_UID(PM, 1))

	/*
	 * The EC firmware exposes CPU temperature through ec ram
	 * on the first PM channel.
	 */

	#undef EC_DATA_IO
	#define EC_DATA_IO IT8516E_FIRST_DATA
	#undef EC_SC_IO
	#define EC_SC_IO IT8516E_FIRST_SC
	#include <ec/acpi/ec.asl>

	Method (_CRS)
	{
		/* Announce the used i/o ports to the OS */
		Return (ResourceTemplate () {
			IO (Decode16, IT8516E_FIRST_DATA, IT8516E_FIRST_DATA, 0x01, 0x01)
			IO (Decode16, IT8516E_FIRST_SC, IT8516E_FIRST_SC, 0x01, 0x01)
		})
	}

	/*
	 * Get CPU temperature from first PM channel (in 10th Kelvin)
	 */
	Method (CTK)
	{
		Store (EC_READ (0x52), Local0)
		If (And (Local0, EC_ERROR_MASK)) {
			Return (0)
		}
		Multiply (Local0, 10, Local0)	/* Convert to 10th °C */
		Return (Add (Local0, 2732))	/* Return as 10th Kelvin */
	}
}
#endif

#ifdef IT8516E_SECOND_DATA
Device (PM2) {
	Name (_HID, EisaId("PNP0C02"))
	Name (_STR, Unicode("IT8516E PM Channel 2"))
	Name (_UID, SUPERIO_UID(PM, 2))

	/*
	 * The EC firmware exposes fan and GPIO control through the
	 * second PM channel.
	 */

	#undef EC_DATA_IO
	#define EC_DATA_IO IT8516E_SECOND_DATA
	#undef EC_SC_IO
	#define EC_SC_IO IT8516E_SECOND_SC
	#include <ec/acpi/ec.asl>

	Method (_CRS)
	{
		/* Announce the used i/o ports to the OS */
		Return (ResourceTemplate () {
			IO (Decode16, IT8516E_SECOND_DATA, IT8516E_SECOND_DATA, 0x01, 0x01)
			IO (Decode16, IT8516E_SECOND_SC, IT8516E_SECOND_SC, 0x01, 0x01)
		})
	}

	/*
	 * Get CPU temperature from second PM channel (in 10th Kelvin)
	 */
	Method (CTK)
	{
		Acquire (EC_MUTEX, 0xffff)
		Store (SEND_EC_COMMAND (0x20), Local0) /* GET_CPUTEMP */
		If (And (Local0, EC_ERROR_MASK)) {
			Release (EC_MUTEX)
			Return (0)
		}
		Store (RECV_EC_DATA (), Local0)	/* Temp low byte in 64th °C */
		If (And (Local0, EC_ERROR_MASK)) {
			Release (EC_MUTEX)
			Return (0)
		}
		Store (RECV_EC_DATA (), Local1)	/* Temp high byte in 64th °C */
		If (And (Local1, EC_ERROR_MASK)) {
			Release (EC_MUTEX)
			Return (0)
		}
		Release (EC_MUTEX)

		Or (ShiftLeft (Local1, 8), Local0, Local0)
		Store (Divide (Multiply (Local0, 10), 64), Local0)	/* Convert to 10th °C */
		Return (Add (Local0, 2732))				/* Return as 10th Kelvin */
	}
}
#endif