73 lines
1.9 KiB
Plaintext
73 lines
1.9 KiB
Plaintext
/** @file
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ACPI functions that drive pin states
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Copyright (c) 2018 - 2019, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#define PIN_GPIO_PAD_INDEX 0
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#define PIN_GPIO_POLARITY_INDEX 1
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//
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// This library provides functions that configure pin states.
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//
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// GPIO package definition:
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// Package() {
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// GpioPad : IntObj
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// GpioActiveStatePolarity : IntObj
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// }
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//
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//
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// GPIO library imports
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//
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External(\_SB.GGOV, MethodObj)
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External(\_SB.SGOV, MethodObj)
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Scope(\) {
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//
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// Note this is not a real power resource we simply use this to declare new named scope
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//
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PowerResource(PIN, 0, 0) {
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//
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// Check pin status function
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// @param[in] Arg0 Pin descriptor package
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//
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// @return GPIO pin status relative to GpioActiveStatePolarity value
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//
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Method(STA, 1, Serialized) {
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If(LEqual(\_SB.GGOV(DeRefOf(Index(Arg0, PIN_GPIO_PAD_INDEX))), DeRefOf(Index(Arg0, PIN_GPIO_POLARITY_INDEX)))) {
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Return(1)
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} Else {
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Return(0)
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}
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}
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//
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// Drive pin to active state function.
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// @param[in] Arg0 Pin descriptor package
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//
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Method(ON, 1, Serialized) {
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ADBG(Concatenate("PINH GPIO=", ToHexString(DeRefOf(Index(Arg0, PIN_GPIO_PAD_INDEX)))))
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\_SB.SGOV(DeRefOf(Index(Arg0, PIN_GPIO_PAD_INDEX)), DeRefOf(Index(Arg0, PIN_GPIO_POLARITY_INDEX)))
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}
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//
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// Drive pin to inactive state.
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// @param[in] Arg0 Pin descriptor package
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//
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Method(OFF, 1, Serialized) {
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ADBG(Concatenate("PINL GPIO=", ToHexString(DeRefOf(Index(Arg0, PIN_GPIO_PAD_INDEX)))))
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\_SB.SGOV(DeRefOf(Index(Arg0, PIN_GPIO_PAD_INDEX)), Not(DeRefOf(Index(Arg0, PIN_GPIO_POLARITY_INDEX))))
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}
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// Dummy standard methods for OSPM.
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// PowerResource is required to implement those.
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Method(_STA) {Return(0)}
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Method(_ON) {}
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Method(_OFF) {}
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}
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}
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