Add a debug UART implementation for this serial driver. It does not set up pinmux automatically - this must be done before calling debug_uart_init().
Signed-off-by: Simon Glass sjg@chromium.org ---
drivers/serial/Kconfig | 7 +++++++ drivers/serial/serial_s5p.c | 25 +++++++++++++++++++++++++ 2 files changed, 32 insertions(+)
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 4829284..e51f915 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -44,6 +44,13 @@ config DEBUG_UART_NS16550 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_S5P + bool "Samsung S5P" + help + Select this to enable a debug UART using the serial_s5p driver. You + will need to provide parameters to make this work. The driver will + be available until the real driver-model serial is running. + endchoice
config DEBUG_UART_BASE diff --git a/drivers/serial/serial_s5p.c b/drivers/serial/serial_s5p.c index 7abec53..4a553a3 100644 --- a/drivers/serial/serial_s5p.c +++ b/drivers/serial/serial_s5p.c @@ -200,3 +200,28 @@ U_BOOT_DRIVER(serial_s5p) = { .ops = &s5p_serial_ops, .flags = DM_FLAG_PRE_RELOC, }; + +#ifdef CONFIG_DEBUG_UART_S5P + +#include <debug_uart.h> + +void debug_uart_init(void) +{ + struct s5p_uart *uart = (struct s5p_uart *)CONFIG_DEBUG_UART_BASE; + + s5p_serial_init(uart); + s5p_serial_baud(uart, CONFIG_DEBUG_UART_CLOCK, CONFIG_BAUDRATE); +} + +static inline void _debug_uart_putc(int ch) +{ + struct s5p_uart *uart = (struct s5p_uart *)CONFIG_DEBUG_UART_BASE; + + while (readl(&uart->ufstat) & TX_FIFO_FULL); + + writeb(ch, &uart->utxh); +} + +DEBUG_UART_FUNCS + +#endif