blob: 01628680f770832e9a42f229d94e48b73e5de1ef [file] [log] [blame]
/*
* Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <arch.h>
#include <asm_macros.S>
#define USE_FINISH_CONSOLE_REG_2
#include <console_macros.S>
#include <assert_macros.S>
#include "imx8_lpuart.h"
.globl console_lpuart_register
.globl console_lpuart_init
.globl console_lpuart_putc
.globl console_lpuart_getc
.globl console_lpuart_flush
func console_lpuart_register
mov x7, x30
mov x6, x3
cbz x6, register_fail
str x0, [x6, #CONSOLE_T_DRVDATA]
bl console_lpuart_init
cbz x0, register_fail
mov x0, x6
mov x30, x7
finish_console_register lpuart putc=1, getc=1, flush=1
register_fail:
ret x7
endfunc console_lpuart_register
func console_lpuart_init
mov w0, #1
ret
endfunc console_lpuart_init
func console_lpuart_putc
ldr x1, [x1, #CONSOLE_T_DRVDATA]
cbz x1, putc_error
/* Prepare '\r' to '\n' */
cmp w0, #0xA
b.ne 2f
1:
/* Check if the transmit FIFO is full */
ldr w2, [x1, #STAT]
tbz w2, #23, 1b
mov w2, #0xD
str w2, [x1, #DATA]
2:
/* Check if the transmit FIFO is full */
ldr w2, [x1, #STAT]
tbz w2, #23, 2b
str w0, [x1, #DATA]
ret
putc_error:
mov w0, #-1
ret
endfunc console_lpuart_putc
func console_lpuart_getc
ldr x0, [x0, #CONSOLE_T_DRVDATA]
cbz x0, getc_error
/* Check if the receive FIFO state */
ret
getc_error:
mov w0, #-1
ret
endfunc console_lpuart_getc
func console_lpuart_flush
mov x0, #0
ret
endfunc console_lpuart_flush