| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (C) 2013 Pengutronix |
| * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de> |
| */ |
| |
| #define UARTn_CMD 0x000c |
| #define UARTn_CMD_TXEN 0x0004 |
| |
| #define UARTn_STATUS 0x0010 |
| #define UARTn_STATUS_TXC 0x0020 |
| #define UARTn_STATUS_TXBL 0x0040 |
| |
| #define UARTn_TXDATA 0x0034 |
| |
| .macro addruart, rx, tmp, tmp2 |
| ldr \rx, =(CONFIG_DEBUG_UART_PHYS) |
| |
| /* |
| * enable TX. The driver might disable it to save energy. We |
| * don't care about disabling at the end as during debug power |
| * consumption isn't that important. |
| */ |
| ldr \tmp, =(UARTn_CMD_TXEN) |
| str \tmp, [\rx, #UARTn_CMD] |
| .endm |
| |
| .macro senduart,rd,rx |
| strb \rd, [\rx, #UARTn_TXDATA] |
| .endm |
| |
| .macro waituart,rd,rx |
| 1001: ldr \rd, [\rx, #UARTn_STATUS] |
| tst \rd, #UARTn_STATUS_TXBL |
| beq 1001b |
| .endm |
| |
| .macro busyuart,rd,rx |
| 1001: ldr \rd, [\rx, UARTn_STATUS] |
| tst \rd, #UARTn_STATUS_TXC |
| bne 1001b |
| .endm |
