blob: 647f26abf08faa2e61a244d4fd6f71d7b721ec27 [file] [log] [blame]
/*
* Copyright (c) 2019 Intel corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
/* Disable syscall tracing for all calls from this compilation unit to avoid
* undefined symbols as the macros are not expanded recursively
*/
#define DISABLE_SYSCALL_TRACING
#include <errno.h>
#include <ctype.h>
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/drivers/uart.h>
#include <zephyr/sys/__assert.h>
#include <tracing_core.h>
#include <tracing_buffer.h>
#include <tracing_backend.h>
static const struct device *const tracing_uart_dev =
DEVICE_DT_GET(DT_CHOSEN(zephyr_tracing_uart));
#ifdef CONFIG_TRACING_HANDLE_HOST_CMD
static void uart_isr(const struct device *dev, void *user_data)
{
int rx;
uint8_t byte;
static uint8_t *cmd;
static uint32_t length, cur;
ARG_UNUSED(user_data);
while (uart_irq_update(dev) && uart_irq_is_pending(dev)) {
if (!uart_irq_rx_ready(dev)) {
continue;
}
rx = uart_fifo_read(dev, &byte, 1);
if (rx < 0) {
uart_irq_rx_disable(dev);
return;
}
if (!cmd) {
length = tracing_cmd_buffer_alloc(&cmd);
}
if (isprint(byte) == 0) {
if (byte == '\r') {
cmd[cur] = '\0';
tracing_cmd_handle(cmd, cur);
cmd = NULL;
cur = 0U;
}
continue;
}
if (cur < length - 1) {
cmd[cur++] = byte;
}
}
}
#endif
static void tracing_backend_uart_output(
const struct tracing_backend *backend,
uint8_t *data, uint32_t length)
{
for (uint32_t i = 0; i < length; i++) {
uart_poll_out(tracing_uart_dev, data[i]);
}
}
static void tracing_backend_uart_init(void)
{
__ASSERT(device_is_ready(tracing_uart_dev), "uart backend is not ready");
#ifdef CONFIG_TRACING_HANDLE_HOST_CMD
uart_irq_rx_disable(tracing_uart_dev);
uart_irq_tx_disable(tracing_uart_dev);
uart_irq_callback_set(tracing_uart_dev, uart_isr);
while (uart_irq_rx_ready(tracing_uart_dev)) {
uint8_t c;
uart_fifo_read(tracing_uart_dev, &c, 1);
}
uart_irq_rx_enable(tracing_uart_dev);
#endif
}
const struct tracing_backend_api tracing_backend_uart_api = {
.init = tracing_backend_uart_init,
.output = tracing_backend_uart_output
};
TRACING_BACKEND_DEFINE(tracing_backend_uart, tracing_backend_uart_api);