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
361001:		ldr	\rd, [\rx, #UARTn_STATUS]
37		tst	\rd, #UARTn_STATUS_TXBL
38		beq	1001b
39		.endm
40
41		.macro	busyuart,rd,rx
421001:		ldr	\rd, [\rx, UARTn_STATUS]
43		tst	\rd, #UARTn_STATUS_TXC
44		bne	1001b
45		.endm