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/*
* 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
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