projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 494e492d UKK |
2 | /* |
| 3 | * Copyright (C) 2013 Pengutronix | |
| 4 | * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de> | |
| 494e492d UKK |
5 | */ |
| 6 | ||
| 7 | #define UARTn_CMD 0x000c | |
| 8 | #define UARTn_CMD_TXEN 0x0004 | |
| 9 | ||
| 10 | #define UARTn_STATUS 0x0010 | |
| 11 | #define UARTn_STATUS_TXC 0x0020 | |
| 12 | #define UARTn_STATUS_TXBL 0x0040 | |
| 13 | ||
| 14 | #define UARTn_TXDATA 0x0034 | |
| 15 | ||
| 7505f042 | 16 | .macro addruart, rx, tmp, tmp2 |
| 494e492d UKK |
17 | ldr \rx, =(CONFIG_DEBUG_UART_PHYS) |
| 18 | ||
| 19 | /* | |
| 20 | * enable TX. The driver might disable it to save energy. We | |
| 21 | * don't care about disabling at the end as during debug power | |
| 22 | * consumption isn't that important. | |
| 23 | */ | |
| 24 | ldr \tmp, =(UARTn_CMD_TXEN) | |
| 25 | str \tmp, [\rx, #UARTn_CMD] | |
| 26 | .endm | |
| 27 | ||
| 28 | .macro senduart,rd,rx | |
| 29 | strb \rd, [\rx, #UARTn_TXDATA] | |
| 30 | .endm | |
| 31 | ||
| 32 | .macro waituart,rd,rx | |
| 33 | 1001: ldr \rd, [\rx, #UARTn_STATUS] | |
| 34 | tst \rd, #UARTn_STATUS_TXBL | |
| 35 | beq 1001b | |
| 36 | .endm | |
| 37 | ||
| 38 | .macro busyuart,rd,rx | |
| 39 | 1001: ldr \rd, [\rx, UARTn_STATUS] | |
| 40 | tst \rd, #UARTn_STATUS_TXC | |
| 41 | bne 1001b | |
| 42 | .endm |