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/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (C) STMicroelectronics SA 2017 - All Rights Reserved * Author: Gerald Baeza <gerald.baeza@st.com> for STMicroelectronics. */ #ifdef CONFIG_STM32F4_DEBUG_UART #define STM32_USART_SR_OFF 0x00 #define STM32_USART_TDR_OFF 0x04 #endif #if defined(CONFIG_STM32F7_DEBUG_UART) || defined(CONFIG_STM32H7_DEBUG_UART) || \ defined(CONFIG_STM32MP1_DEBUG_UART) #define STM32_USART_SR_OFF 0x1C #define STM32_USART_TDR_OFF 0x28 #endif #define STM32_USART_TC (1 << 6) /* Tx complete */ #define STM32_USART_TXE (1 << 7) /* Tx data reg empty */ .macro addruart, rp, rv, tmp ldr \rp, =CONFIG_DEBUG_UART_PHYS @ physical base ldr \rv, =CONFIG_DEBUG_UART_VIRT @ virt base .endm .macro senduart,rd,rx strb \rd, [\rx, #STM32_USART_TDR_OFF] .endm .macro waituartcts,rd,rx .endm .macro waituarttxrdy,rd,rx 1001: ldr \rd, [\rx, #(STM32_USART_SR_OFF)] @ Read Status Register tst \rd, #STM32_USART_TXE @ TXE = 1 = tx empty beq 1001b .endm .macro busyuart,rd,rx 1001: ldr \rd, [\rx, #(STM32_USART_SR_OFF)] @ Read Status Register tst \rd, #STM32_USART_TC @ TC = 1 = tx complete beq 1001b .endm