Refactor async console output

This adds a 'ch' command which prints/sets which channels are active

This handles all the async output; the remaining debug commands will
be refactored to use ccprintf() / ccputs() in a followup CL.

Signed-off-by: Randall Spangler <rspangler@chromium.org>

BUG=chrome-os-partner:7464
TEST=manual

ch --> all channels active
ch 0x100 -> just port80 active
powerbtn -> system boots; only port 80 codes shown on console

Change-Id: I9efc43acec919b62b78c2c82c61946d32380adfe

1 files changed, 5 insertions, 0 deletions

diff --git a/include/uart.h b/include/uart.h
index 67a2968d6c..17922879bc 100644
--- a/include/uart.h
+++ b/include/uart.h
@@ -8,6 +8,7 @@
 #ifndef __CROS_EC_UART_H
 #define __CROS_EC_UART_H
 
+#include <stdarg.h>  /* For va_list */
 #include "common.h"
 
 
@@ -55,6 +56,10 @@ int uart_puts(const char *outstr);
  * Floating point output (%f / %g) is not supported. */
 int uart_printf(const char *format, ...);
 
+/* Print formatted output to the UART, like vprintf().  Supports the same
+ * formatting codes as uart_printf(). */
+int uart_vprintf(const char *format, va_list args);
+
 /* Flushes output.  Blocks until UART has transmitted all output. */
 void uart_flush_output(void);