Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
44 lines
1.1 KiB
ArmAsm
44 lines
1.1 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) STMicroelectronics SA 2017 - All Rights Reserved
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* Author: Gerald Baeza <gerald.baeza@st.com> for STMicroelectronics.
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*/
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#ifdef CONFIG_STM32F4_DEBUG_UART
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#define STM32_USART_SR_OFF 0x00
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#define STM32_USART_TDR_OFF 0x04
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#endif
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#if defined(CONFIG_STM32F7_DEBUG_UART) || defined(CONFIG_STM32H7_DEBUG_UART) || \
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defined(CONFIG_STM32MP1_DEBUG_UART)
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#define STM32_USART_SR_OFF 0x1C
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#define STM32_USART_TDR_OFF 0x28
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#endif
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#define STM32_USART_TC (1 << 6) /* Tx complete */
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#define STM32_USART_TXE (1 << 7) /* Tx data reg empty */
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.macro addruart, rp, rv, tmp
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ldr \rp, =CONFIG_DEBUG_UART_PHYS @ physical base
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ldr \rv, =CONFIG_DEBUG_UART_VIRT @ virt base
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.endm
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.macro senduart,rd,rx
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strb \rd, [\rx, #STM32_USART_TDR_OFF]
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.endm
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.macro waituartcts,rd,rx
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.endm
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.macro waituarttxrdy,rd,rx
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1001: ldr \rd, [\rx, #(STM32_USART_SR_OFF)] @ Read Status Register
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tst \rd, #STM32_USART_TXE @ TXE = 1 = tx empty
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beq 1001b
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.endm
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.macro busyuart,rd,rx
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1001: ldr \rd, [\rx, #(STM32_USART_SR_OFF)] @ Read Status Register
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tst \rd, #STM32_USART_TC @ TC = 1 = tx complete
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beq 1001b
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.endm
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