mirror of
https://github.com/Telecominfraproject/OpenCellular.git
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44eb5829c6
BUG=chrome-os-partner:59141
BRANCH=none
TEST=Manually tested on Reef. System can enter and exit from S0iX
when LID is closed & opened respectively.
Change-Id: I5892da327c2dcdd400d5a7ade867bec1b80cbaa4
Signed-off-by: Vijay Hiremath <vijay.p.hiremath@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/407047
Commit-Ready: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Tested-by: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
128 lines
2.7 KiB
C
128 lines
2.7 KiB
C
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* LPC module for Chrome EC */
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#ifndef __CROS_EC_LPC_H
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#define __CROS_EC_LPC_H
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#include "common.h"
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/**
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* Return a pointer to the memory-mapped buffer.
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*
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* This buffer is writable at any time, and the host can read it at any time.
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*/
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uint8_t *lpc_get_memmap_range(void);
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/**
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* Return true if keyboard data is waiting for the host to read (TOH is still
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* set).
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*/
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int lpc_keyboard_has_char(void);
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/* Return true if the FRMH is still set */
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int lpc_keyboard_input_pending(void);
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/**
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* Send a byte to host via keyboard port 0x60.
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*
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* @param chr Byte to send
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* @param send_irq If non-zero, asserts IRQ
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*/
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void lpc_keyboard_put_char(uint8_t chr, int send_irq);
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/**
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* Clear the keyboard buffer.
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*/
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void lpc_keyboard_clear_buffer(void);
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/**
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* Send an IRQ to host if there is a byte in buffer already.
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*/
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void lpc_keyboard_resume_irq(void);
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/**
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* Return non-zero if the COMx interface has received a character.
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*/
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int lpc_comx_has_char(void);
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/**
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* Return the next character pending on the COMx interface.
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*/
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int lpc_comx_get_char(void);
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/**
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* Put a character to the COMx LPC interface.
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*/
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void lpc_comx_put_char(int c);
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/*
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* Low-level LPC interface for host events.
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*
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* For use by host_event_commands.c. Other modules should use the methods
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* provided in host_command.h.
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*/
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/* Types of host events */
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enum lpc_host_event_type {
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LPC_HOST_EVENT_SMI = 0,
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LPC_HOST_EVENT_SCI,
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LPC_HOST_EVENT_WAKE,
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};
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/**
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* Set the event state.
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*/
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void lpc_set_host_event_state(uint32_t mask);
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/**
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* Clear and return the lowest host event.
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*/
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int lpc_query_host_event_state(void);
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/**
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* Set the event mask for the specified event type.
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*
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* @param type Event type
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* @param mask New event mask
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*/
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void lpc_set_host_event_mask(enum lpc_host_event_type type, uint32_t mask);
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/**
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* Return the event mask for the specified event type.
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*/
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uint32_t lpc_get_host_event_mask(enum lpc_host_event_type type);
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/**
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* Set the EC_LPC_STATUS_* mask for the specified status.
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*/
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void lpc_set_acpi_status_mask(uint8_t mask);
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/**
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* Clear the EC_LPC_STATUS_* mask for the specified status.
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*/
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void lpc_clear_acpi_status_mask(uint8_t mask);
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/**
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* Return the state of platform reset.
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*
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* @return non-zero if PLTRST# is asserted (low); 0 if not asserted (high).
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*/
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int lpc_get_pltrst_asserted(void);
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/**
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* Reset the host with KBRST# or RCIN#
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*/
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void lpc_host_reset(void);
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/* Disable LPC ACPI interrupts */
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void lpc_disable_acpi_interrupts(void);
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/* Enable LPC ACPI interrupts */
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void lpc_enable_acpi_interrupts(void);
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#endif /* __CROS_EC_LPC_H */
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