diff options
Diffstat (limited to 'arch/arm/mach-stm32mp1/include/mach/debug_ll.h')
| -rw-r--r-- | arch/arm/mach-stm32mp1/include/mach/debug_ll.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/arm/mach-stm32mp1/include/mach/debug_ll.h b/arch/arm/mach-stm32mp1/include/mach/debug_ll.h new file mode 100644 index 0000000000..99fedb91fe --- /dev/null +++ b/arch/arm/mach-stm32mp1/include/mach/debug_ll.h @@ -0,0 +1,28 @@ +#ifndef __MACH_STM32MP1_DEBUG_LL_H +#define __MACH_STM32MP1_DEBUG_LL_H + +#include <io.h> +#include <mach/stm32.h> + +#define DEBUG_LL_UART_ADDR STM32_UART4_BASE + +#define CR1_OFFSET 0x00 +#define CR3_OFFSET 0x08 +#define BRR_OFFSET 0x0c +#define ISR_OFFSET 0x1c +#define ICR_OFFSET 0x20 +#define RDR_OFFSET 0x24 +#define TDR_OFFSET 0x28 + +#define USART_ISR_TXE BIT(7) + +static inline void PUTC_LL(int c) +{ + void __iomem *base = IOMEM(DEBUG_LL_UART_ADDR); + + writel(c, base + TDR_OFFSET); + + while ((readl(base + ISR_OFFSET) & USART_ISR_TXE) == 0); +} + +#endif /* __MACH_STM32MP1_DEBUG_LL_H */ |