1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) STMicroelectronics SA 2017 - All Rights Reserved
4 * Author:   Gerald Baeza <gerald.baeza@st.com> for STMicroelectronics.
5 */
6
7#ifdef CONFIG_STM32F4_DEBUG_UART
8#define STM32_USART_SR_OFF		0x00
9#define STM32_USART_TDR_OFF		0x04
10#endif
11
12#if defined(CONFIG_STM32F7_DEBUG_UART) || defined(CONFIG_STM32H7_DEBUG_UART) || \
13	defined(CONFIG_STM32MP1_DEBUG_UART)
14#define STM32_USART_SR_OFF		0x1C
15#define STM32_USART_TDR_OFF		0x28
16#endif
17
18#define STM32_USART_TC			(1 << 6)	/* Tx complete       */
19#define STM32_USART_TXE			(1 << 7)	/* Tx data reg empty */
20
21.macro	addruart, rp, rv, tmp
22	ldr	\rp, =CONFIG_DEBUG_UART_PHYS @ physical base
23	ldr	\rv, =CONFIG_DEBUG_UART_VIRT @ virt base
24.endm
25
26.macro  senduart,rd,rx
27	strb    \rd, [\rx, #STM32_USART_TDR_OFF]
28.endm
29
30.macro	waituartcts,rd,rx
31.endm
32
33.macro  waituarttxrdy,rd,rx
341001:	ldr	\rd, [\rx, #(STM32_USART_SR_OFF)]	@ Read Status Register
35	tst	\rd, #STM32_USART_TXE			@ TXE = 1 = tx empty
36	beq	1001b
37.endm
38
39.macro  busyuart,rd,rx
401001:	ldr	\rd, [\rx, #(STM32_USART_SR_OFF)]	@ Read Status Register
41	tst	\rd, #STM32_USART_TC			@ TC = 1 = tx complete
42	beq	1001b
43.endm
44