114 lines
2.0 KiB
C
114 lines
2.0 KiB
C
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/* Copyright 2014 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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#include "clock.h"
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#include "common.h"
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#include "gpio.h"
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#include "registers.h"
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#include "system.h"
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#include "task.h"
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#include "uart.h"
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#include "uartn.h"
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#include "util.h"
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static uint8_t done_uart_init_yet;
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#define USE_UART_INTERRUPTS (!(defined(CONFIG_CUSTOMIZED_RO) && \
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defined(SECTION_IS_RO)))
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#ifndef UARTN
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#define UARTN 0
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#endif
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int uart_init_done(void)
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{
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return done_uart_init_yet;
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}
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void uart_tx_start(void)
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{
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uartn_tx_start(UARTN);
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}
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void uart_tx_stop(void)
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{
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uartn_tx_stop(UARTN);
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}
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int uart_tx_in_progress(void)
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{
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return uartn_tx_in_progress(UARTN);
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}
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void uart_tx_flush(void)
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{
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uartn_tx_flush(UARTN);
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}
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int uart_tx_ready(void)
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{
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/* True if the TX buffer is not completely full */
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return uartn_tx_ready(UARTN);
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}
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int uart_rx_available(void)
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{
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/* True if the RX buffer is not completely empty. */
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return uartn_rx_available(UARTN);
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}
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void uart_write_char(char c)
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{
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uartn_write_char(UARTN, c);
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}
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int uart_read_char(void)
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{
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return uartn_read_char(UARTN);
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}
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#if USE_UART_INTERRUPTS
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/**
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* Interrupt handlers for UART0
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*/
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static void uart_console_tx_interrupt(void)
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{
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/* Clear transmit interrupt status */
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GR_UART_ISTATECLR(UARTN) = GC_UART_ISTATECLR_TX_MASK;
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/* Fill output FIFO */
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uart_process_output();
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}
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DECLARE_IRQ(GC_IRQNUM_UART0_TXINT, uart_console_tx_interrupt, 1);
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static void uart_console_rx_interrupt(void)
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{
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/* Clear receive interrupt status */
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GR_UART_ISTATECLR(UARTN) = GC_UART_ISTATECLR_RX_MASK;
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/* Read input FIFO until empty */
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uart_process_input();
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}
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DECLARE_IRQ(GC_IRQNUM_UART0_RXINT, uart_console_rx_interrupt, 1);
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#endif /* USE_UART_INTERRUPTS */
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void uart_init(void)
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{
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clock_enable_module(MODULE_UART, 1);
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/* Initialize the Cr50 UART */
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uartn_init(UARTN);
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uartn_enable(UARTN);
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#ifdef UART_AP
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uartn_init(UART_AP);
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#endif
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#ifdef UART_EC
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uartn_init(UART_EC);
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#endif
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done_uart_init_yet = 1;
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}
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