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-rw-r--r--src/lib/usbdebug.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/src/lib/usbdebug.c b/src/lib/usbdebug.c
index 24d7967127..200121ff5b 100644
--- a/src/lib/usbdebug.c
+++ b/src/lib/usbdebug.c
@@ -27,7 +27,11 @@
#include <ehci.h>
#include <usbdebug.h>
-// Does not work if we want early printk to do usb debug, too..
+/* Set this to 1 to debug the start-up of EHCI debug port hardware. You need
+ * to modify console_init() to initialise some other console before usbdebug
+ * to receive the printk lines from here.
+ * There will be no real usbdebug console output while DBGP_DEBUG is set.
+ */
#define DBGP_DEBUG 0
#if DBGP_DEBUG
# define dbgp_printk(fmt_arg...) printk(BIOS_DEBUG, fmt_arg)
@@ -578,7 +582,7 @@ int early_usbdebug_init(void)
void usbdebug_tx_byte(struct ehci_debug_info *dbg_info, unsigned char data)
{
-
+#if DBGP_DEBUG == 0
if (!dbg_info) {
/* "Find" dbg_info structure in Cache */
dbg_info = (struct ehci_debug_info *)
@@ -592,10 +596,12 @@ void usbdebug_tx_byte(struct ehci_debug_info *dbg_info, unsigned char data)
dbg_info->bufidx = 0;
}
}
+#endif
}
void usbdebug_tx_flush(struct ehci_debug_info *dbg_info)
{
+#if DBGP_DEBUG == 0
if (!dbg_info) {
/* "Find" dbg_info structure in Cache */
dbg_info = (struct ehci_debug_info *)
@@ -606,4 +612,5 @@ void usbdebug_tx_flush(struct ehci_debug_info *dbg_info)
dbgp_bulk_write_x(dbg_info, dbg_info->buf, dbg_info->bufidx);
dbg_info->bufidx = 0;
}
+#endif
}