1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) STMicroelectronics SA 2017 -
4 * Author: Gerald Baeza <gerald.baeza@st.com>
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) || defi
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 <<
19 #define STM32_USART_TXE (1 <<
20
21 .macro addruart, rp, rv, tmp
22 ldr \rp, =CONFIG_DEBUG_UART_PHYS @
23 ldr \rv, =CONFIG_DEBUG_UART_VIRT @
24 .endm
25
26 .macro senduart,rd,rx
27 strb \rd, [\rx, #STM32_USART_TDR_OF
28 .endm
29
30 .macro waituartcts,rd,rx
31 .endm
32
33 .macro waituarttxrdy,rd,rx
34 1001: ldr \rd, [\rx, #(STM32_USART_SR_OF
35 tst \rd, #STM32_USART_TXE
36 beq 1001b
37 .endm
38
39 .macro busyuart,rd,rx
40 1001: ldr \rd, [\rx, #(STM32_USART_SR_OF
41 tst \rd, #STM32_USART_TC
42 beq 1001b
43 .endm
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