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authorJim Lin <jilin@nvidia.com>2013-08-13 19:04:22 +0800
committerMarek Vasut <marex@denx.de>2013-08-26 21:56:35 +0200
commit07551f23434f35b67aa8e6cf5ccd68ca417c73e6 (patch)
tree5cede537e555b8f6b74438b381e930fe20794354 /common/usb_kbd.c
parentb63056d6a40a22f859feeae9329e0e842d57302e (diff)
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console: usb: kbd: To improve TFTP booting performance
TFTP booting is slow when a USB keyboard is installed and stdin has usbkbd added. This fix is to change Ctrl-C polling for USB keyboard to every second when NET transfer is running. Signed-off-by: Jim Lin <jilin@nvidia.com>
Diffstat (limited to 'common/usb_kbd.c')
-rw-r--r--common/usb_kbd.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/common/usb_kbd.c b/common/usb_kbd.c
index 2ca3767..89e30e8 100644
--- a/common/usb_kbd.c
+++ b/common/usb_kbd.c
@@ -104,6 +104,11 @@ struct usb_kbd_pdata {
uint8_t flags;
};
+extern int __maybe_unused net_busy_flag;
+
+/* The period of time between two calls of usb_kbd_testc(). */
+static unsigned long __maybe_unused kbd_testc_tms;
+
/* Generic keyboard event polling. */
void usb_kbd_generic_poll(void)
{
@@ -365,6 +370,16 @@ static int usb_kbd_getc(void)
struct usb_device *usb_kbd_dev;
struct usb_kbd_pdata *data;
+#ifdef CONFIG_CMD_NET
+ /*
+ * If net_busy_flag is 1, NET transfer is running,
+ * then we check key-pressed every second (first check may be
+ * less than 1 second) to improve TFTP booting performance.
+ */
+ if (net_busy_flag && (get_timer(kbd_testc_tms) < CONFIG_SYS_HZ))
+ return 0;
+ kbd_testc_tms = get_timer(0);
+#endif
dev = stdio_get_by_name(DEVNAME);
usb_kbd_dev = (struct usb_device *)dev->priv;
data = usb_kbd_dev->privptr;