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 --- Changes in v2: 1. Change configuration name from CONFIG_CTRLC_POLL_MS to CONFIG_CTRLC_POLL_S. 2. New code will be executed only when CONFIG_CTRLC_POLL_S is defined in configuration header file. 3. Add description in README.console. Changes in v3: 1. Move changes to common/usb_kbd.c and doc/README.usb 2. Rename config setting to CONFIG_USBKB_TESTC_PERIOD. 3. Remove slow response on USB-keyboard input when TFTP boot is not running. Changes in v4: 1. Remove changes in doc/README.usb, common/usb_kbd.c and CONFIG_USBKB_TESTC_PERIOD 2. Modify net/net.c Changes in v5: 1. Change variable name to ctrlc_t_start. 2. Use two calls of get_timer(0) to get time gap. Changes in v6: 1. In common/usb_kbd.c, check net_busy_flag to determine whether we poll USB keyboard status. 2. In include/usb.h, add external variable declaration net_busy_flag Changes in v7: 1. In common/usb_kbd.c and include/usb.h, add #ifdef CONFIG_CMD_NET. 2. In common/usb_kbd.c, modify code to get correct time gap. Changes in v8: 1. Add __maybe_unused for variable kbd_testc_tms. Changes in v9: 1. Move external variable declaration from include/usb.h to common/usb_kbd.c
common/usb_kbd.c | 15 +++++++++++++++ 1 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/common/usb_kbd.c b/common/usb_kbd.c index 3174b5e..46100e6 100644 --- a/common/usb_kbd.c +++ b/common/usb_kbd.c @@ -121,6 +121,11 @@ 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) { @@ -366,6 +371,16 @@ static int usb_kbd_testc(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;