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/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* LPC module for Chrome EC */
#ifndef __CROS_EC_LPC_H
#define __CROS_EC_LPC_H
#include "common.h"
/* Manually generate an IRQ to host.
* Note that the irq_num == 0 would set the AH bit (Active High).
*/
void lpc_manual_irq(int irq_num);
/* Return a pointer to the host command data buffer. This buffer must
* only be accessed between a notification to host_command_received()
* and a subsequent call to lpc_SendHostResponse(). <slot> is 0 for
* kernel-originated commands, 1 for usermode-originated commands. */
uint8_t *lpc_get_host_range(int slot);
/* Return a pointer to the memory-mapped buffer. This buffer is writable at
* any time, and the host can read it at any time. */
uint8_t *lpc_get_memmap_range(void);
/* Send a result code to a host command. <slot> is 0 for kernel-originated
* commands, 1 for usermode-originated commands. */
void lpc_send_host_response(int slot, int result);
/* Return true if the TOH is still set */
int lpc_keyboard_has_char(void);
/* Send a byte to host via port 0x60 and asserts IRQ if specified. */
void lpc_keyboard_put_char(uint8_t chr, int send_irq);
/* Return non-zero if the COMx interface has received a character. */
int lpc_comx_has_char(void);
/* Return the next character pending on the COMx interface. */
int lpc_comx_get_char(void);
/* Put a character to the COMx LPC interface. */
void lpc_comx_put_char(int c);
/* Types of host events */
enum lpc_host_event_type {
LPC_HOST_EVENT_SMI = 0,
LPC_HOST_EVENT_SCI,
LPC_HOST_EVENT_WAKE,
};
/* Set one or more SCI/SMI event bits. */
void lpc_set_host_events(uint32_t mask);
/* Clear one or more SCI/SMI event bits. Write 1 to a bit to clear it. */
void lpc_clear_host_events(uint32_t mask);
/* Return the raw SCI/SMI event state. */
uint32_t lpc_get_host_events(void);
/* Set the event mask for the specified event type. */
void lpc_set_host_event_mask(enum lpc_host_event_type type, uint32_t mask);
/* Return the event mask for the specified event type. */
uint32_t lpc_get_host_event_mask(enum lpc_host_event_type type);
#endif /* __CROS_EC_LPC_H */
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