diff options
Diffstat (limited to 'src/ec/kontron/it8516e/acpi/pm_channels.asl')
| -rw-r--r-- | src/ec/kontron/it8516e/acpi/pm_channels.asl | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/ec/kontron/it8516e/acpi/pm_channels.asl b/src/ec/kontron/it8516e/acpi/pm_channels.asl new file mode 100644 index 0000000000..f18ac364d2 --- /dev/null +++ b/src/ec/kontron/it8516e/acpi/pm_channels.asl @@ -0,0 +1,115 @@ +/* + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#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 |