blob: 660fa1e4b77beb87bd47b4fc8c4f8fa31d19eaa5 [file] [log] [blame]
* Copyright (C) 2013 Pengutronix
* Uwe Kleine-Koenig <>
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
#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
* 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]
.macro senduart,rd,rx
strb \rd, [\rx, #UARTn_TXDATA]
.macro waituart,rd,rx
1001: ldr \rd, [\rx, #UARTn_STATUS]
beq 1001b
.macro busyuart,rd,rx
1001: ldr \rd, [\rx, UARTn_STATUS]
tst \rd, #UARTn_STATUS_TXC
bne 1001b