| /* 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 |