| /* SPDX-License-Identifier: GPL-2.0-only */ | |
| /* | |
| * Copyright (C) 2014 Carlo Caione | |
| * Carlo Caione <carlo@caione.org> | |
| */ | |
| #define MESON_AO_UART_WFIFO 0x0 | |
| #define MESON_AO_UART_STATUS 0xc | |
| #define MESON_AO_UART_TX_FIFO_EMPTY (1 << 22) | |
| #define MESON_AO_UART_TX_FIFO_FULL (1 << 21) | |
| .macro addruart, rp, rv, tmp | |
| ldr \rp, =(CONFIG_DEBUG_UART_PHYS) @ physical | |
| ldr \rv, =(CONFIG_DEBUG_UART_VIRT) @ virtual | |
| .endm | |
| .macro senduart,rd,rx | |
| str \rd, [\rx, #MESON_AO_UART_WFIFO] | |
| .endm | |
| .macro busyuart,rd,rx | |
| 1002: ldr \rd, [\rx, #MESON_AO_UART_STATUS] | |
| tst \rd, #MESON_AO_UART_TX_FIFO_EMPTY | |
| beq 1002b | |
| .endm | |
| .macro waituartcts,rd,rx | |
| .endm | |
| .macro waituarttxrdy,rd,rx | |
| 1001: ldr \rd, [\rx, #MESON_AO_UART_STATUS] | |
| tst \rd, #MESON_AO_UART_TX_FIFO_FULL | |
| bne 1001b | |
| .endm |