diff options
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/serial/serial_arc.c | 26 |
2 files changed, 35 insertions, 0 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 1aab0320f6..8777909860 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -197,6 +197,15 @@ config DEBUG_UART_AR933X driver will be available until the real driver model serial is running. +config DEBUG_ARC_SERIAL + bool "ARC UART" + depends on ARC_SERIAL + help + Select this to enable a debug UART using the ARC UART driver. + You will need to provide parameters to make this work. The + driver will be available until the real driver model serial is + running. + config DEBUG_UART_ATMEL bool "Atmel USART" help diff --git a/drivers/serial/serial_arc.c b/drivers/serial/serial_arc.c index da4a07ab2f..925f0c2555 100644 --- a/drivers/serial/serial_arc.c +++ b/drivers/serial/serial_arc.c @@ -130,3 +130,29 @@ U_BOOT_DRIVER(serial_arc) = { .ops = &arc_serial_ops, .flags = DM_FLAG_PRE_RELOC, }; + +#ifdef CONFIG_DEBUG_ARC_SERIAL +#include <debug_uart.h> + +static inline void _debug_uart_init(void) +{ + struct arc_serial_regs *regs = (struct arc_serial_regs *)CONFIG_DEBUG_UART_BASE; + int arc_console_baud = CONFIG_DEBUG_UART_CLOCK / (CONFIG_BAUDRATE * 4) - 1; + + writeb(arc_console_baud & 0xff, ®s->baudl); + writeb((arc_console_baud & 0xff00) >> 8, ®s->baudh); +} + +static inline void _debug_uart_putc(int c) +{ + struct arc_serial_regs *regs = (struct arc_serial_regs *)CONFIG_DEBUG_UART_BASE; + + while (!(readb(®s->status) & UART_TXEMPTY)) + ; + + writeb(c, ®s->data); +} + +DEBUG_UART_FUNCS + +#endif |