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 <ji...@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. common/usb_kbd.c | 13 +++++++++++++ include/usb.h | 2 +- 2 files changed, 14 insertions(+), 1 deletions(-) diff --git a/common/usb_kbd.c b/common/usb_kbd.c index 3174b5e..4e7b304 100644 --- a/common/usb_kbd.c +++ b/common/usb_kbd.c @@ -121,6 +121,9 @@ struct usb_kbd_pdata { uint8_t flags; }; +/* 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 +369,16 @@ 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; diff --git a/include/usb.h b/include/usb.h index d7b082d..5c95bf5 100644 --- a/include/usb.h +++ b/include/usb.h @@ -206,7 +206,7 @@ int usb_host_eth_scan(int mode); int drv_usb_kbd_init(void); int usb_kbd_deregister(void); - +extern int __maybe_unused net_busy_flag; #endif /* routines */ int usb_init(void); /* initialize the USB Controller */ -- 1.7.7 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot