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/* Copyright 2016 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.
*/
#include "consumer.h"
#include "producer.h"
#include "registers.h"
#include "task.h"
#include "board.h"
#ifndef __CROS_FORWARD_UART_H
#define __CROS_FORWARD_UART_H
#define CONFIGURE_INTERRUPTS__rx_int(NAME) send_data_to_usb(&NAME)
struct usart_config {
int uart;
struct producer const producer;
struct consumer const consumer;
};
extern struct consumer_ops const uart_consumer_ops;
extern struct producer_ops const uart_producer_ops;
#define CONFIGURE_INTERRUPTS(NAME, \
RXINT, \
TXINT) \
void CONCAT2(NAME, _rx_int_)(void); \
void CONCAT2(NAME, _tx_int_)(void); \
DECLARE_IRQ(RXINT, CONCAT2(NAME, _rx_int_), 1); \
DECLARE_IRQ(TXINT, CONCAT2(NAME, _tx_int_), 1); \
void CONCAT2(NAME, _tx_int_)(void) \
{ \
/* Clear transmit interrupt status */ \
GR_UART_ISTATECLR(NAME.uart) = \
GC_UART_ISTATECLR_TX_MASK; \
/* Fill output FIFO */ \
get_data_from_usb(&NAME); \
} \
void CONCAT2(NAME, _rx_int_)(void) \
{ \
/* Clear receive interrupt status */ \
GR_UART_ISTATECLR(NAME.uart) = \
GC_UART_ISTATECLR_RX_MASK; \
/* Read input FIFO until empty */ \
CONFIGURE_INTERRUPTS__rx_int(NAME); \
}
#define USART_CONFIG(NAME, \
UART, \
RX_QUEUE, \
TX_QUEUE) \
struct usart_config const NAME = { \
.uart = UART, \
.consumer = { \
.queue = &TX_QUEUE, \
.ops = &uart_consumer_ops, \
}, \
.producer = { \
.queue = &RX_QUEUE, \
.ops = &uart_producer_ops, \
}, \
}
/* Read data from UART and add it to the producer queue */
void send_data_to_usb(struct usart_config const *config);
/* Read data from the consumer queue and send it to the UART */
void get_data_from_usb(struct usart_config const *config);
/* Helper for UART bitbang mode. */
extern struct usart_config const ec_uart;
/* Change EC UART-USB Bridge status */
void uart_ec_bridge_enable(int enabled, int write);
/* Return non-zero if EC UART-USB Bridge is enabled, or 0 otherwise */
int uart_ec_bridge_is_enabled(void);
/* Return non-zero if EC UART-USB Bridge is readwritable, or 0 otherwise */
int uart_ec_bridge_tx_is_enabled(void);
#endif /* __CROS_FORWARD_UART_H */
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