[PATCH] ARM: stm32: debug: add low-level debug support
From: Gerald Baeza This adds low-level debug support on USART1 for STM32F4 and STM32F7. Compiled via 'CONFIG_DEBUG_LL' and 'CONFIG_EARLY_PRINTK'. Enabled via 'earlyprintk' in bootargs. Signed-off-by: Gerald Baeza Signed-off-by: Bich Hemon --- arch/arm/Kconfig.debug | 27 +++ arch/arm/include/debug/stm32.S | 41 + 2 files changed, 68 insertions(+) create mode 100644 arch/arm/include/debug/stm32.S diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 447629d..0b6e61e 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -1126,6 +1126,28 @@ choice If unsure, say N. + config STM32F4_DEBUG_UART + bool "Use STM32F4 UART for low-level debug" + depends on ARCH_STM32 + 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. + + If unsure, say N. + + config STM32F7_DEBUG_UART + bool "Use STM32F7 UART for low-level debug" + depends on ARCH_STM32 + select DEBUG_STM32_UART + help + Say Y here if you want kernel low-level debugging support + on STM32F7 based platforms, which default UART is wired on + USART1. + + If unsure, say N. + config TEGRA_DEBUG_UART_AUTO_ODMDATA bool "Kernel low-level debugging messages via Tegra UART via ODMDATA" depends on ARCH_TEGRA @@ -1410,6 +1432,10 @@ config DEBUG_STI_UART bool depends on ARCH_STI +config DEBUG_STM32_UART + bool + depends on ARCH_STM32 + config DEBUG_SIRFSOC_UART bool depends on ARCH_SIRF @@ -1457,6 +1483,7 @@ config DEBUG_LL_INCLUDE default "debug/s5pv210.S" if DEBUG_S5PV210_UART default "debug/sirf.S" if DEBUG_SIRFSOC_UART default "debug/sti.S" if DEBUG_STI_UART + default "debug/stm32.S" if DEBUG_STM32_UART default "debug/tegra.S" if DEBUG_TEGRA_UART default "debug/ux500.S" if DEBUG_UX500_UART default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT diff --git a/arch/arm/include/debug/stm32.S b/arch/arm/include/debug/stm32.S new file mode 100644 index 000..1e060a5 --- /dev/null +++ b/arch/arm/include/debug/stm32.S @@ -0,0 +1,41 @@ +/* + * Copyright (C) STMicroelectronics SA 2017 + * Author: Gerald Baeza + * License terms: GNU General Public License (GPL), version 2 + */ + +#define STM32_UART_BASE0x40011000 /* USART1 */ + +#ifdef CONFIG_STM32F4_DEBUG_UART +#define STM32_USART_SR_OFF 0x00 +#define STM32_USART_TDR_OFF0x04 +#endif + +#ifdef CONFIG_STM32F7_DEBUG_UART +#define STM32_USART_SR_OFF 0x1C +#define STM32_USART_TDR_OFF0x28 +#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, =STM32_UART_BASE @ physical base + ldr \rv, =STM32_UART_BASE @ virt base /* NoMMU */ + .endm + + .macro senduart,rd,rx + strb\rd, [\rx, #STM32_USART_TDR_OFF] + .endm + + .macro waituart,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 -- 1.9.1
Re: [PATCH] ARM: stm32: debug: add low-level debug support
On Thu, Jul 27, 2017 at 04:50:20PM +, Bich HEMON wrote: > From: Gerald Baeza > > This adds low-level debug support on USART1 for STM32F4 > and STM32F7. > Compiled via 'CONFIG_DEBUG_LL' and 'CONFIG_EARLY_PRINTK'. > Enabled via 'earlyprintk' in bootargs. > > Signed-off-by: Gerald Baeza > Signed-off-by: Bich Hemon Hi, This had fallen between the chairs it seems. I have applied it to arm-soc next/soc now, for 4.21 merge window. It ended up being patched up manually to consolidate the version in Russell's patch tracker with this posted version, and I tweaked whitespace a bit. Let me know if I missed something. Thanks, -Olof
Re: [PATCH] ARM: stm32: debug: add low-level debug support
On 11/12/18 7:22 PM, Olof Johansson wrote: > On Thu, Jul 27, 2017 at 04:50:20PM +, Bich HEMON wrote: >> From: Gerald Baeza >> >> This adds low-level debug support on USART1 for STM32F4 >> and STM32F7. >> Compiled via 'CONFIG_DEBUG_LL' and 'CONFIG_EARLY_PRINTK'. >> Enabled via 'earlyprintk' in bootargs. >> >> Signed-off-by: Gerald Baeza >> Signed-off-by: Bich Hemon > > Hi, > > This had fallen between the chairs it seems. I have applied it to arm-soc > next/soc now, for 4.21 merge window. > > It ended up being patched up manually to consolidate the version in > Russell's patch tracker with this posted version, and I tweaked whitespace > a bit. Let me know if I missed something. > > > Thanks, > > -Olof > Hi Olof, Please note that this patch has to be abandoned as Ludovic BARRE pushed a new version of this change: https://patchwork.codeaurora.org/patch/400563/ You can find it in Russell's tracker here: http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=8803/1 Best regards, Bich
Re: [PATCH] ARM: stm32: debug: add low-level debug support
On Tue, Nov 13, 2018 at 09:16:16AM +, Bich HEMON wrote: > > On 11/12/18 7:22 PM, Olof Johansson wrote: > > On Thu, Jul 27, 2017 at 04:50:20PM +, Bich HEMON wrote: > >> From: Gerald Baeza > >> > >> This adds low-level debug support on USART1 for STM32F4 > >> and STM32F7. > >> Compiled via 'CONFIG_DEBUG_LL' and 'CONFIG_EARLY_PRINTK'. > >> Enabled via 'earlyprintk' in bootargs. > >> > >> Signed-off-by: Gerald Baeza > >> Signed-off-by: Bich Hemon > > > > Hi, > > > > This had fallen between the chairs it seems. I have applied it to arm-soc > > next/soc now, for 4.21 merge window. > > > > It ended up being patched up manually to consolidate the version in > > Russell's patch tracker with this posted version, and I tweaked whitespace > > a bit. Let me know if I missed something. > > > > > > Thanks, > > > > -Olof > > > > Hi Olof, > > Please note that this patch has to be abandoned as Ludovic BARRE pushed > a new version of this change: > https://patchwork.codeaurora.org/patch/400563/ > > You can find it in Russell's tracker here: > http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=8803/1 And I'm not going to merge that because: 1) it's not for me to merge - it doesn't go through my tree, but through arm-soc, which Olof and Arnd manage. 2) it's not been on the mailing list as per normal submission process. Sorry. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up According to speedtest.net: 11.9Mbps down 500kbps up
Re: [PATCH] ARM: stm32: debug: add low-level debug support
On 11/13/18 10:24 AM, Russell King - ARM Linux wrote: > On Tue, Nov 13, 2018 at 09:16:16AM +, Bich HEMON wrote: >> >> On 11/12/18 7:22 PM, Olof Johansson wrote: >>> On Thu, Jul 27, 2017 at 04:50:20PM +, Bich HEMON wrote: From: Gerald Baeza This adds low-level debug support on USART1 for STM32F4 and STM32F7. Compiled via 'CONFIG_DEBUG_LL' and 'CONFIG_EARLY_PRINTK'. Enabled via 'earlyprintk' in bootargs. Signed-off-by: Gerald Baeza Signed-off-by: Bich Hemon >>> >>> Hi, >>> >>> This had fallen between the chairs it seems. I have applied it to arm-soc >>> next/soc now, for 4.21 merge window. >>> >>> It ended up being patched up manually to consolidate the version in >>> Russell's patch tracker with this posted version, and I tweaked whitespace >>> a bit. Let me know if I missed something. >>> >>> >>> Thanks, >>> >>> -Olof >>> >> >> Hi Olof, >> >> Please note that this patch has to be abandoned as Ludovic BARRE pushed >> a new version of this change: >> https://patchwork.codeaurora.org/patch/400563/ >> >> You can find it in Russell's tracker here: >> http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=8803/1 > > And I'm not going to merge that because: > > 1) it's not for me to merge - it doesn't go through my tree, but through > arm-soc, which Olof and Arnd manage. > 2) it's not been on the mailing list as per normal submission process. > > Sorry. > Ok, thank you for the feedback. So Olof, can you please ignore my previous email and merge my patch as you proposed it for 4.21. Ludovic's patch will be abandoned instead. Thanks, Bich
Re: [PATCH] ARM: stm32: debug: add low-level debug support
Take a look at the patch I merged, and please follow up with any patch to fixup any issue you find with it. As mentioned in my original email, I tried to consolidate the two versions, so a look-through and follow up with fixes would be appreciated. Thanks! -Olof On Tue, Nov 13, 2018 at 2:17 AM Bich HEMON wrote: > > > > On 11/13/18 10:24 AM, Russell King - ARM Linux wrote: > > On Tue, Nov 13, 2018 at 09:16:16AM +, Bich HEMON wrote: > >> > >> On 11/12/18 7:22 PM, Olof Johansson wrote: > >>> On Thu, Jul 27, 2017 at 04:50:20PM +, Bich HEMON wrote: > From: Gerald Baeza > > This adds low-level debug support on USART1 for STM32F4 > and STM32F7. > Compiled via 'CONFIG_DEBUG_LL' and 'CONFIG_EARLY_PRINTK'. > Enabled via 'earlyprintk' in bootargs. > > Signed-off-by: Gerald Baeza > Signed-off-by: Bich Hemon > >>> > >>> Hi, > >>> > >>> This had fallen between the chairs it seems. I have applied it to arm-soc > >>> next/soc now, for 4.21 merge window. > >>> > >>> It ended up being patched up manually to consolidate the version in > >>> Russell's patch tracker with this posted version, and I tweaked whitespace > >>> a bit. Let me know if I missed something. > >>> > >>> > >>> Thanks, > >>> > >>> -Olof > >>> > >> > >> Hi Olof, > >> > >> Please note that this patch has to be abandoned as Ludovic BARRE pushed > >> a new version of this change: > >> https://patchwork.codeaurora.org/patch/400563/ > >> > >> You can find it in Russell's tracker here: > >> http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=8803/1 > > > > And I'm not going to merge that because: > > > > 1) it's not for me to merge - it doesn't go through my tree, but through > > arm-soc, which Olof and Arnd manage. > > 2) it's not been on the mailing list as per normal submission process. > > > > Sorry. > > > > Ok, thank you for the feedback. > > So Olof, can you please ignore my previous email and merge my patch as > you proposed it for 4.21. Ludovic's patch will be abandoned instead. > > Thanks, > > Bich
Re: [PATCH] ARM: stm32: debug: add low-level debug support
Hi Olof, I had a look at your next branch and no fix is required as you corrected it all by consolidating Ludovic's version with mine. Thanks a lot! Bich On 11/13/18 8:02 PM, Olof Johansson wrote: > Take a look at the patch I merged, and please follow up with any patch > to fixup any issue you find with it. > > As mentioned in my original email, I tried to consolidate the two > versions, so a look-through and follow up with fixes would be > appreciated. Thanks! > > > -Olof > > On Tue, Nov 13, 2018 at 2:17 AM Bich HEMON wrote: >> >> >> >> On 11/13/18 10:24 AM, Russell King - ARM Linux wrote: >>> On Tue, Nov 13, 2018 at 09:16:16AM +, Bich HEMON wrote: On 11/12/18 7:22 PM, Olof Johansson wrote: > On Thu, Jul 27, 2017 at 04:50:20PM +, Bich HEMON wrote: >> From: Gerald Baeza >> >> This adds low-level debug support on USART1 for STM32F4 >> and STM32F7. >> Compiled via 'CONFIG_DEBUG_LL' and 'CONFIG_EARLY_PRINTK'. >> Enabled via 'earlyprintk' in bootargs. >> >> Signed-off-by: Gerald Baeza >> Signed-off-by: Bich Hemon > > Hi, > > This had fallen between the chairs it seems. I have applied it to arm-soc > next/soc now, for 4.21 merge window. > > It ended up being patched up manually to consolidate the version in > Russell's patch tracker with this posted version, and I tweaked whitespace > a bit. Let me know if I missed something. > > > Thanks, > > -Olof > Hi Olof, Please note that this patch has to be abandoned as Ludovic BARRE pushed a new version of this change: https://patchwork.codeaurora.org/patch/400563/ You can find it in Russell's tracker here: http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=8803/1 >>> >>> And I'm not going to merge that because: >>> >>> 1) it's not for me to merge - it doesn't go through my tree, but through >>> arm-soc, which Olof and Arnd manage. >>> 2) it's not been on the mailing list as per normal submission process. >>> >>> Sorry. >>> >> >> Ok, thank you for the feedback. >> >> So Olof, can you please ignore my previous email and merge my patch as >> you proposed it for 4.21. Ludovic's patch will be abandoned instead. >> >> Thanks, >> >> Bich
