blob: fc7b48423ce29ea032c3f1f3c82a684bb695d78d [file] [log] [blame]
/*
* Copyright (c) 2017 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <kernel.h>
#include <arch/cpu.h>
#include <uart.h>
#include <sys_io.h>
#include "altera_avalon_jtag_uart.h"
#include "altera_avalon_jtag_uart_regs.h"
#define UART_ALTERA_JTAG_DATA_REG 0
#define UART_ALTERA_JTAG_CONTROL_REG 1
#define DEV_CFG(dev) \
((const struct uart_device_config * const)(dev)->config->config_info)
extern int altera_avalon_jtag_uart_read(altera_avalon_jtag_uart_state *sp,
char *buffer, int space, int flags);
extern int altera_avalon_jtag_uart_write(altera_avalon_jtag_uart_state *sp,
const char *ptr, int count, int flags);
static unsigned char uart_altera_jtag_poll_out(struct device *dev,
unsigned char c)
{
const struct uart_device_config *config;
altera_avalon_jtag_uart_state ustate;
config = DEV_CFG(dev);
ustate.base = JTAG_UART_0_BASE;
altera_avalon_jtag_uart_write(&ustate, &c, 1, 0);
return c;
}
static int uart_altera_jtag_init(struct device *dev)
{
/*
* Work around to clear interrupt enable bits
* as it is not being done by HAL driver explicitly.
*/
IOWR_ALTERA_AVALON_JTAG_UART_CONTROL(JTAG_UART_0_BASE, 0);
return 0;
}
static const struct uart_driver_api uart_altera_jtag_driver_api = {
.poll_in = NULL,
.poll_out = &uart_altera_jtag_poll_out,
.err_check = NULL,
};
static const struct uart_device_config uart_altera_jtag_dev_cfg_0 = {
.base = (void *)JTAG_UART_0_BASE,
.sys_clk_freq = 0, /* Unused */
};
DEVICE_AND_API_INIT(uart_altera_jtag_0, "jtag_uart0",
uart_altera_jtag_init, NULL,
&uart_altera_jtag_dev_cfg_0,
PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
&uart_altera_jtag_driver_api);