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ARM: debug: stm32: add UART early console configuration for STM32F4

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Early console is hardcoded on USART1 in current implementation.
With this patch, default UART instance is USART1, but other UART instances
can be configured by setting physical and virtual base addresses in
menuconfig.

Signed-off-by: Erwan Le Ray <erwan.leray@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
This commit is contained in:
Erwan Le Ray 2020-02-03 15:04:22 +01:00 committed by Alexandre Torgue
parent bb6d3fb354
commit 79d5cfd19d
2 changed files with 8 additions and 8 deletions
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10
arch/arm/Kconfig.debug
View File

@ -1201,12 +1201,13 @@ choice
config STM32F4_DEBUG_UART
bool "Use STM32F4 UART for low-level debug"
depends on ARCH_STM32
depends on MACH_STM32F429 || MACH_STM32F469
select DEBUG_STM32_UART
help
Say Y here if you want kernel low-level debugging support
on STM32F4 based platforms, which default UART is wired on
USART1.
USART1, but another UART instance can be selected by modifying
CONFIG_DEBUG_UART_PHYS.
If unsure, say N.
@ -1619,6 +1620,7 @@ config DEBUG_UART_PHYS
default 0x3e000000 if DEBUG_BCM_KONA_UART
default 0x3f201000 if DEBUG_BCM2836
default 0x4000e400 if DEBUG_LL_UART_EFM32
default 0x40011000 if STM32F4_DEBUG_UART
default 0x40028000 if DEBUG_AT91_SAMV7_USART1
default 0x40081000 if DEBUG_LPC18XX_UART0
default 0x40090000 if DEBUG_LPC32XX
@ -1713,7 +1715,7 @@ config DEBUG_UART_PHYS
DEBUG_S3C64XX_UART || \
DEBUG_BCM63XX_UART || DEBUG_ASM9260_UART || \
DEBUG_SIRFSOC_UART || DEBUG_DIGICOLOR_UA0 || \
DEBUG_AT91_UART
DEBUG_AT91_UART || DEBUG_STM32_UART
config DEBUG_UART_VIRT
hex "Virtual base address of debug UART"
@ -1823,7 +1825,7 @@ config DEBUG_UART_VIRT
DEBUG_S3C64XX_UART || \
DEBUG_BCM63XX_UART || DEBUG_ASM9260_UART || \
DEBUG_SIRFSOC_UART || DEBUG_DIGICOLOR_UA0 || \
DEBUG_AT91_UART
DEBUG_AT91_UART || DEBUG_STM32_UART
config DEBUG_UART_8250_SHIFT
int "Register offset shift for the 8250 debug UART"

6
arch/arm/include/debug/stm32.S
View File

@ -4,8 +4,6 @@
* Author: Gerald Baeza <gerald.baeza@st.com> for STMicroelectronics.
*/
#define STM32_UART_BASE 0x40011000 /* USART1 */
#ifdef CONFIG_STM32F4_DEBUG_UART
#define STM32_USART_SR_OFF 0x00
#define STM32_USART_TDR_OFF 0x04
@ -20,8 +18,8 @@
#define STM32_USART_TXE (1 << 7) /* Tx data reg empty */
.macro addruart, rp, rv, tmp
ldr \rp, =STM32_UART_BASE @ physical base
ldr \rv, =STM32_UART_BASE @ virt base /* NoMMU */
ldr \rp, =CONFIG_DEBUG_UART_PHYS @ physical base
ldr \rv, =CONFIG_DEBUG_UART_VIRT @ virt base
.endm
.macro senduart,rd,rx