1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2013 Pengutronix
4 * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
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	waituartcts,rd,rx
33		.endm
34
35		.macro	waituarttxrdy,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
46