| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2013 Pengutronix |
| 4 | * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de> |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 | |
| 16 | .macro addruart, rx, tmp, tmp2 |
| 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 |