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Diffstat (limited to 'src/ec/quanta/ene_kb3940q/acpi/battery.asl')
| -rw-r--r-- | src/ec/quanta/ene_kb3940q/acpi/battery.asl | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/src/ec/quanta/ene_kb3940q/acpi/battery.asl b/src/ec/quanta/ene_kb3940q/acpi/battery.asl new file mode 100644 index 0000000000..8fbd9bba1b --- /dev/null +++ b/src/ec/quanta/ene_kb3940q/acpi/battery.asl @@ -0,0 +1,159 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011-2012 The Chromium OS Authors. All rights reserved. + * + * 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 + */ + +/* + * The mainboard must define strings in the root scope to + * report device-specific battery information to the OS. + * + * BATV: Vendor + */ + +// Scope (EC0) + +Device (BATX) +{ + Name (_HID, EISAID ("PNP0C0A")) + Name (_UID, 1) + Name (_PCL, Package () { \_SB }) + + Name (PBIF, Package () { + 0x00000001, // 0 Power Unit: mAh + 0xFFFFFFFF, // 1 Design Capacity + 0xFFFFFFFF, // 2 Last Full Charge Capacity + 0x00000001, // 3 Battery Technology: Rechargeable + 0xFFFFFFFF, // 4 Design Voltage + 0x000000FA, // 5 Design Capacity of Warning + 0x00000096, // 6 Design Capacity of Low + 0x0000000A, // 7 Capacity Granularity 1 + 0x00000019, // 8 Capacity Granularity 2 + "", // 9 Model Number + "", // 10 Serial Number + "", // 11 Battery Type + "" // 12 OEM Information + }) + + Name (PBST, Package () { + 0x00000000, // Battery State + 0xFFFFFFFF, // Battery Present Rate + 0xFFFFFFFF, // Battery Remaining Capacity + 0xFFFFFFFF, // Battery Present Voltage + }) + + // Workaround for full battery status, enabled by default + Name (BFWK, One) + + // Method to enable full battery workaround + Method (BFWE) + { + Store (One, BFWK) + } + + // Method to disable full battery workaround + Method (BFWD) + { + Store (Zero, BFWK) + } + + // Device insertion/removal control method that returns a device’s status. + // Power resource object that evaluates to the current on or off state of + // the Power Resource. + Method (_STA, 0, Serialized) + { + If (BTIN) { + Return (0x1F) + } Else { + Return (0x0F) + } + } + + Method (_BIF, 0, Serialized) + { + // Update fields from EC + Store (BDC0, Index (PBIF, 1)) // Batt Design Capacity + Store (BFC0, Index (PBIF, 2)) // Batt Last Full Charge Capacity + Store (BDV0, Index (PBIF, 4)) // Batt Design Voltage + Divide(BFC0, 0x64, Local0, Local1) + Multiply(Local1, 0x0A, Local0) + Store(Local0, Index(PBIF, 5)) + Multiply(Local1, 0x05, Local0) + Store (Local0, Index (PBIF, 6)) + Store (ToString(BATD), Index (PBIF, 9)) // Model Number + Store (ToDecimalString(BSN0), Index (PBIF, 10)) // Serial Number + Store (ToString(BCHM), Index (PBIF, 11)) // Battery Type + Store (\BATV, Index (PBIF, 12)) // OEM information + + Return (PBIF) + } + + Method (_BST, 0, Serialized) + { + // + // 0: BATTERY STATE + // + // bit 0 = discharging + // bit 1 = charging + // bit 2 = critical level + // + + // Get battery state from EC + Store (BST0, Local0) + Store (Local0, Index (PBST, 0)) + + // + // 1: BATTERY PRESENT RATE/CURRENT + // + Store (BPC0, Local1) + If (LAnd (Local1, 0x8000)) { + Xor (Local1, 0xFFFF, Local1) + Increment (Local1) + } + Store (Local1, Index (PBST, 1)) + + // + // 2: BATTERY REMAINING CAPACITY + // + Store (BRC0, Local1) + + If (LAnd (BFWK, LAnd (ADPT, LNot (Local0)))) { + // On AC power and battery is neither charging + // nor discharging. Linux expects a full battery + // to report same capacity as last full charge. + // https://bugzilla.kernel.org/show_bug.cgi?id=12632 + Store (BFC0, Local2) + + // See if within ~3% of full + ShiftRight (Local2, 5, Local3) + If (LAnd (LGreater (Local1, Subtract (Local2, Local3)), + LLess (Local1, Add (Local2, Local3)))) + { + Store (Local2, Local1) + } + } + Store (Local1, Index (PBST, 2)) + + // + // 3: BATTERY PRESENT VOLTAGE + // + Store (BPV0, Index (PBST, 3)) + + Return (PBST) + } +} |