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- /* SPDX-License-Identifier: GPL-2.0 */
- /*
- * Copyright (C) STMicroelectronics SA 2017 - All Rights Reserved
- * Author: Gerald Baeza <[email protected]> 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
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