pl011.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/mmio.h>
#include <boot/coreboot_tables.h>
#include <console/uart.h>
#include <drivers/uart/pl011.h>
 
void uart_init(unsigned int idx)
{
}
 
void uart_tx_byte(unsigned int idx, unsigned char data)
{
        struct pl011_uart *regs = uart_platform_baseptr(idx);
 
        write8(&regs->dr, data);
        uart_tx_flush(idx);
}
 
void uart_tx_flush(unsigned int idx)
{
        struct pl011_uart *regs = uart_platform_baseptr(idx);
 
        /* FIXME: add a timeout */
        while (!(read32(&regs->fr) & PL011_UARTFR_TXFE))
                ;
}
 
unsigned char uart_rx_byte(unsigned int idx)
{
        struct pl011_uart *regs = uart_platform_baseptr(idx);
 
        while (read32(&regs->fr) & PL011_UARTFR_RXFE)
                ;
        return read8(&regs->dr);
}
 
void uart_fill_lb(void *data)
{
        struct lb_serial serial;
        serial.type = LB_SERIAL_TYPE_MEMORY_MAPPED;
        serial.baseaddr = uart_platform_base(CONFIG_UART_FOR_CONSOLE);
        serial.baud = get_uart_baudrate();
        serial.regwidth = 1;
        serial.input_hertz = uart_platform_refclk();
        serial.uart_pci_addr = CONFIG_UART_PCI_ADDR;
        lb_add_serial(&serial, data);
 
        lb_add_console(LB_TAG_CONSOLE_SERIAL8250MEM, data);
}