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#define STM32_UART_BASE			0x40011000	/* USART1 */
 8
 9#ifdef CONFIG_STM32F4_DEBUG_UART
10#define STM32_USART_SR_OFF		0x00
11#define STM32_USART_TDR_OFF		0x04
12#endif
13
14#ifdef CONFIG_STM32F7_DEBUG_UART
15#define STM32_USART_SR_OFF		0x1C
16#define STM32_USART_TDR_OFF		0x28
17#endif
18
19#define STM32_USART_TC			(1 << 6)	/* Tx complete       */
20#define STM32_USART_TXE			(1 << 7)	/* Tx data reg empty */
21
22.macro	addruart, rp, rv, tmp
23	ldr	\rp,      =STM32_UART_BASE	@ physical base
24	ldr	\rv,      =STM32_UART_BASE      @ virt base /* NoMMU */
25.endm
26
27.macro  senduart,rd,rx
28	strb    \rd, [\rx, #STM32_USART_TDR_OFF]
29.endm
30
31.macro  waituart,rd,rx
321001:	ldr	\rd, [\rx, #(STM32_USART_SR_OFF)]	@ Read Status Register
33	tst	\rd, #STM32_USART_TXE			@ TXE = 1 = tx empty
34	beq	1001b
35.endm
36
37.macro  busyuart,rd,rx
381001:	ldr	\rd, [\rx, #(STM32_USART_SR_OFF)]	@ Read Status Register
39	tst	\rd, #STM32_USART_TC			@ TC = 1 = tx complete
40	beq	1001b
41.endm