55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
/*
|
|
* Copyright (c) 2016 Jean-Paul Etienne <fractalclone@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include <kernel.h>
|
|
#include <arch/cpu.h>
|
|
#include <uart.h>
|
|
#include <sys_io.h>
|
|
|
|
#define DEV_CFG(dev) \
|
|
((const struct uart_device_config * const) \
|
|
(dev)->config->config_info)
|
|
|
|
static unsigned char uart_riscv_qemu_poll_out(struct device *dev,
|
|
unsigned char c)
|
|
{
|
|
sys_write8(c, DEV_CFG(dev)->regs);
|
|
return c;
|
|
}
|
|
|
|
static int uart_riscv_qemu_poll_in(struct device *dev, unsigned char *c)
|
|
{
|
|
*c = sys_read8(DEV_CFG(dev)->regs);
|
|
return 0;
|
|
}
|
|
|
|
static int uart_riscv_qemu_init(struct device *dev)
|
|
{
|
|
/* Nothing to do */
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static const struct uart_driver_api uart_riscv_qemu_driver_api = {
|
|
.poll_in = uart_riscv_qemu_poll_in,
|
|
.poll_out = uart_riscv_qemu_poll_out,
|
|
.err_check = NULL,
|
|
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
|
|
#error "Interrupt not available in uart riscv32-qemu"
|
|
#endif
|
|
};
|
|
|
|
static const struct uart_device_config uart_riscv_qemu_dev_cfg_0 = {
|
|
.regs = RISCV_QEMU_UART_BASE,
|
|
};
|
|
|
|
DEVICE_AND_API_INIT(uart_riscv_qemu_0, "uart0",
|
|
uart_riscv_qemu_init, NULL,
|
|
&uart_riscv_qemu_dev_cfg_0,
|
|
PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
|
|
(void *)&uart_riscv_qemu_driver_api);
|