TI K3 SoCs have ns16550 compatible UARTs. Add lowlevel debugging support for the AM62x SoC from the K3 family.
Signed-off-by: Sascha Hauer <[email protected]> --- arch/arm/include/asm/debug_ll.h | 2 ++ common/Kconfig | 16 ++++++++++- include/mach/k3/debug_ll.h | 49 +++++++++++++++++++++++++++++++++ 3 files changed, 66 insertions(+), 1 deletion(-) create mode 100644 include/mach/k3/debug_ll.h diff --git a/arch/arm/include/asm/debug_ll.h b/arch/arm/include/asm/debug_ll.h index a1d5161ccf..98a7d0d839 100644 --- a/arch/arm/include/asm/debug_ll.h +++ b/arch/arm/include/asm/debug_ll.h @@ -64,6 +64,8 @@ #include <mach/clps711x/debug_ll.h> #elif defined CONFIG_ARCH_AT91 #include <mach/at91/debug_ll.h> +#elif defined CONFIG_ARCH_K3 +#include <mach/k3/debug_ll.h> #endif #endif diff --git a/common/Kconfig b/common/Kconfig index 50f62b9f9a..3938577987 100644 --- a/common/Kconfig +++ b/common/Kconfig @@ -1552,6 +1552,10 @@ config DEBUG_SUN20I depends on SOC_ALLWINNER_SUN20I select DEBUG_LL_NS16550 +config DEBUG_AM62X_UART + bool "Texas Instruments AM62X debug UART" + depends on ARCH_K3 + config DEBUG_QEMU_ARM64_VIRT bool "QEMU ARM64 Virt PL011 console" depends on ARCH_ARM64_VIRT @@ -1582,10 +1586,20 @@ config DEBUG_IMX_UART_PORT Choose UART port on which kernel low-level debug messages should be output. +config DEBUG_K3_UART_PORT + int "K3 Debug UART Port Selection" if DEBUG_AM62X_UART + default 0 + depends on ARCH_K3 + help + Choose UART port on which kernel low-level debug messages + should be output. Possible values are: + AM62x: 0 - 6 + config DEBUG_OMAP_UART_PORT int "OMAP Debug UART Port Selection" if DEBUG_OMAP3_UART || \ DEBUG_OMAP4_UART || \ - DEBUG_AM33XX_UART + DEBUG_AM33XX_UART || \ + DEBUG_AM62X_UART default 1 depends on ARCH_OMAP help diff --git a/include/mach/k3/debug_ll.h b/include/mach/k3/debug_ll.h new file mode 100644 index 0000000000..2433bb8f2e --- /dev/null +++ b/include/mach/k3/debug_ll.h @@ -0,0 +1,49 @@ +#ifndef __MACH_K3_DEBUG_LL_H__ +#define __MACH_K3_DEBUG_LL_H__ +#include <io.h> + +#define AM62X_UART_UART0_BASE 0x02800000 +#define AM62X_UART_UART1_BASE 0x02810000 +#define AM62X_UART_UART2_BASE 0x02820000 +#define AM62X_UART_UART3_BASE 0x02830000 +#define AM62X_UART_UART4_BASE 0x02840000 +#define AM62X_UART_UART5_BASE 0x02850000 +#define AM62X_UART_UART6_BASE 0x02860000 + +#if defined CONFIG_DEBUG_AM62X_UART +#define K3_DEBUG_SOC AM62X_UART + +#define __K3_UART_BASE(soc, num) soc##_UART##num##_BASE +#define K3_UART_BASE(soc, num) __K3_UART_BASE(soc, num) + +static inline uint8_t debug_ll_read_reg(int reg) +{ + void __iomem *base = (void *)K3_UART_BASE(K3_DEBUG_SOC, + CONFIG_DEBUG_K3_UART_PORT); + + return readb(base + (reg << 2)); +} + +static inline void debug_ll_write_reg(int reg, uint8_t val) +{ + void __iomem *base = (void *)K3_UART_BASE(K3_DEBUG_SOC, + CONFIG_DEBUG_K3_UART_PORT); + + writeb(val, base + (reg << 2)); +} + +#include <debug_ll/ns16550.h> + +static inline void debug_ll_init(void) +{ + /* already configured */ +} + +static inline void PUTC_LL(int c) +{ + debug_ll_ns16550_putc(c); +} + +#endif + +#endif /* __MACH_K3_DEBUG_LL_H__ */ -- 2.39.2
