| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 Pengutronix |
| 3 | * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License version 2 as |
| 7 | * published by the Free Software Foundation. |
| 8 | */ |
| 9 | |
| 10 | #define UARTn_CMD 0x000c |
| 11 | #define UARTn_CMD_TXEN 0x0004 |
| 12 | |
| 13 | #define UARTn_STATUS 0x0010 |
| 14 | #define UARTn_STATUS_TXC 0x0020 |
| 15 | #define UARTn_STATUS_TXBL 0x0040 |
| 16 | |
| 17 | #define UARTn_TXDATA 0x0034 |
| 18 | |
| 19 | .macro addruart, rx, tmp, tmp2 |
| 20 | ldr \rx, =(CONFIG_DEBUG_UART_PHYS) |
| 21 | |
| 22 | /* |
| 23 | * enable TX. The driver might disable it to save energy. We |
| 24 | * don't care about disabling at the end as during debug power |
| 25 | * consumption isn't that important. |
| 26 | */ |
| 27 | ldr \tmp, =(UARTn_CMD_TXEN) |
| 28 | str \tmp, [\rx, #UARTn_CMD] |
| 29 | .endm |
| 30 | |
| 31 | .macro senduart,rd,rx |
| 32 | strb \rd, [\rx, #UARTn_TXDATA] |
| 33 | .endm |
| 34 | |
| 35 | .macro waituart,rd,rx |
| 36 | 1001: ldr \rd, [\rx, #UARTn_STATUS] |
| 37 | tst \rd, #UARTn_STATUS_TXBL |
| 38 | beq 1001b |
| 39 | .endm |
| 40 | |
| 41 | .macro busyuart,rd,rx |
| 42 | 1001: ldr \rd, [\rx, UARTn_STATUS] |
| 43 | tst \rd, #UARTn_STATUS_TXC |
| 44 | bne 1001b |
| 45 | .endm |