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| author | Alexander Shiyan <eagle.alexander923@gmail.com> | 2022-04-19 10:21:22 +0300 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2022-04-20 08:45:03 +0200 |
| commit | 4d1314992eea5706b8262b27a00014b44a5fa0a0 (patch) | |
| tree | 3ad939cf85c351184b80fb01aaacad4652be2561 /arch/arm | |
| parent | 6283be4617bb9077cf54d189e717c91034fdbdf6 (diff) | |
| download | barebox-4d1314992eea5706b8262b27a00014b44a5fa0a0.tar.gz barebox-4d1314992eea5706b8262b27a00014b44a5fa0a0.tar.xz | |
ARM: CCMX51: Add support for low-level debug
Signed-off-by: Alexander Shiyan <eagle.alexander923@gmail.com>
Link: https://lore.barebox.org/20220419072123.28590-2-eagle.alexander923@gmail.com
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/boards/ccxmx51/lowlevel.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/arm/boards/ccxmx51/lowlevel.c b/arch/arm/boards/ccxmx51/lowlevel.c index adcb30a7ff..367925e398 100644 --- a/arch/arm/boards/ccxmx51/lowlevel.c +++ b/arch/arm/boards/ccxmx51/lowlevel.c @@ -2,12 +2,37 @@ /* Author: Alexander Shiyan <shc_work@mail.ru> */ #include <common.h> +#include <debug_ll.h> +#include <mach/clock-imx51_53.h> #include <mach/esdctl.h> #include <mach/generic.h> +#include <mach/iomux-mx51.h> #include <asm/barebox-arm.h> #include <asm/barebox-arm-head.h> #include <mach/imx51-regs.h> +static inline void setup_uart(void) +{ + void __iomem *iomuxbase = IOMEM(MX51_IOMUXC_BASE_ADDR); + void __iomem *ccmbase = IOMEM(MX51_CCM_BASE_ADDR); + + /* + * Restore CCM values that might be changed by the Mask ROM + * code. + * + * Source: RealView debug scripts provided by Freescale + */ + writel(MX5_CCM_CBCDR_RESET_VALUE, ccmbase + MX5_CCM_CBCDR); + writel(MX5_CCM_CSCMR1_RESET_VALUE, ccmbase + MX5_CCM_CSCMR1); + writel(MX5_CCM_CSCDR1_RESET_VALUE, ccmbase + MX5_CCM_CSCDR1); + + imx_setup_pad(iomuxbase, MX51_PAD_UART1_TXD__UART1_TXD); + + imx51_uart_setup_ll(); + + putc_ll('>'); +} + ENTRY_FUNCTION(start_ccxmx51, r0, r1, r2) { extern char __dtb_imx51_ccxmx51_start[]; @@ -15,6 +40,9 @@ ENTRY_FUNCTION(start_ccxmx51, r0, r1, r2) imx5_cpu_lowlevel_init(); + if (IS_ENABLED(CONFIG_DEBUG_LL)) + setup_uart(); + arm_setup_stack(0x20000000); fdt = __dtb_imx51_ccxmx51_start + get_runtime_offset(); |