1d8e919c7SMasahiro Yamada/* 2*ac9f1b55SMasahiro Yamada * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved. 3d8e919c7SMasahiro Yamada * 4d8e919c7SMasahiro Yamada * SPDX-License-Identifier: BSD-3-Clause 5d8e919c7SMasahiro Yamada */ 6d8e919c7SMasahiro Yamada 7d8e919c7SMasahiro Yamada#include <asm_macros.S> 8*ac9f1b55SMasahiro Yamada#include <drivers/console.h> 9d8e919c7SMasahiro Yamada 10*ac9f1b55SMasahiro Yamada#include "uniphier_console.h" 11d8e919c7SMasahiro Yamada 12d8e919c7SMasahiro Yamada/* 13d8e919c7SMasahiro Yamada * In: w0 - character to be printed 14*ac9f1b55SMasahiro Yamada * x1 - pointer to console structure 15*ac9f1b55SMasahiro Yamada * Out: return the character written (always succeeds) 16d8e919c7SMasahiro Yamada * Clobber: x2 17d8e919c7SMasahiro Yamada */ 18*ac9f1b55SMasahiro Yamada .globl uniphier_console_putc 19*ac9f1b55SMasahiro Yamadafunc uniphier_console_putc 20*ac9f1b55SMasahiro Yamada ldr x1, [x1, #CONSOLE_T_DRVDATA] 21d8e919c7SMasahiro Yamada 22d8e919c7SMasahiro Yamada /* Wait until the transmitter FIFO gets empty */ 23d8e919c7SMasahiro Yamada0: ldr w2, [x1, #UNIPHIER_UART_LSR] 24d8e919c7SMasahiro Yamada tbz w2, #UNIPHIER_UART_LSR_THRE_BIT, 0b 25d8e919c7SMasahiro Yamada 26d8e919c7SMasahiro Yamada mov w2, w0 27d8e919c7SMasahiro Yamada 28d8e919c7SMasahiro Yamada1: str w2, [x1, #UNIPHIER_UART_TX] 29d8e919c7SMasahiro Yamada 30d8e919c7SMasahiro Yamada cmp w2, #'\n' 31*ac9f1b55SMasahiro Yamada b.ne 2f 32d8e919c7SMasahiro Yamada mov w2, #'\r' /* Append '\r' to '\n' */ 33d8e919c7SMasahiro Yamada b 1b 34*ac9f1b55SMasahiro Yamada2: ret 35*ac9f1b55SMasahiro Yamadaendfunc uniphier_console_putc 36d8e919c7SMasahiro Yamada 37d8e919c7SMasahiro Yamada/* 38*ac9f1b55SMasahiro Yamada * In: x0 - pointer to console structure 39*ac9f1b55SMasahiro Yamada * Out: return the character read, or ERROR_NO_PENDING_CHAR if no character 40*ac9f1b55SMasahiro Yamada is available 41d8e919c7SMasahiro Yamada * Clobber: x1 42d8e919c7SMasahiro Yamada */ 43*ac9f1b55SMasahiro Yamada .globl uniphier_console_getc 44*ac9f1b55SMasahiro Yamadafunc uniphier_console_getc 45*ac9f1b55SMasahiro Yamada ldr x0, [x0, #CONSOLE_T_DRVDATA] 46d8e919c7SMasahiro Yamada 47*ac9f1b55SMasahiro Yamada ldr w1, [x0, #UNIPHIER_UART_LSR] 48*ac9f1b55SMasahiro Yamada tbz w1, #UNIPHIER_UART_LSR_DR_BIT, 0f 49d8e919c7SMasahiro Yamada 50d8e919c7SMasahiro Yamada ldr w0, [x0, #UNIPHIER_UART_RX] 51*ac9f1b55SMasahiro Yamada ret 52d8e919c7SMasahiro Yamada 53*ac9f1b55SMasahiro Yamada0: mov w0, #ERROR_NO_PENDING_CHAR 54d8e919c7SMasahiro Yamada ret 55*ac9f1b55SMasahiro Yamadaendfunc uniphier_console_getc 56d8e919c7SMasahiro Yamada 57d8e919c7SMasahiro Yamada/* 58*ac9f1b55SMasahiro Yamada * In: x0 - pointer to console structure 59*ac9f1b55SMasahiro Yamada * Out: return 0 (always succeeds) 60d8e919c7SMasahiro Yamada * Clobber: x1 61d8e919c7SMasahiro Yamada */ 62*ac9f1b55SMasahiro Yamada .global uniphier_console_flush 63*ac9f1b55SMasahiro Yamadafunc uniphier_console_flush 64*ac9f1b55SMasahiro Yamada ldr x0, [x0, #CONSOLE_T_DRVDATA] 65d8e919c7SMasahiro Yamada 66d8e919c7SMasahiro Yamada /* wait until the transmitter gets empty */ 67d8e919c7SMasahiro Yamada0: ldr w1, [x0, #UNIPHIER_UART_LSR] 68d8e919c7SMasahiro Yamada tbz w1, #UNIPHIER_UART_LSR_TEMT_BIT, 0b 69d8e919c7SMasahiro Yamada 70d8e919c7SMasahiro Yamada mov w0, #0 71d8e919c7SMasahiro Yamada ret 72*ac9f1b55SMasahiro Yamadaendfunc uniphier_console_flush 73