From: Kuo-Jung Su <[email protected]> This patch makes the minimum power-on delay for USB HUB become configurable. The original design waits at least 100 msec here, but some EHCI controlers(e.g. Faraday EHCI) are known to require much longer delay interval.
NOTE: The minimal delay is still 100 msec, a small value defined in CONFIG_USB_HUB_MIN_POWER_ON_DELAY would be automatically justified in common/usb_hub.c. Signed-off-by: Kuo-Jung Su <[email protected]> CC: Marek Vasut <[email protected]> --- Changes for v5: - Split up from Faraday EHCI patch - Replace the Faraday EHCI ifdef for the long delay in usb_hub_configure() with the new configuration option: USB_HUB_MIN_POWER_ON_DELAY, which is used in usb_hub_power_on() to control the minimum usb hub power-on delay. Changes for v2 - v4: - See 'usb: ehci: add Faraday USB 2.0 EHCI support' README | 3 +++ common/usb_hub.c | 8 +++++++- 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/README b/README index 0d37d56..c70a59b 100644 --- a/README +++ b/README @@ -1244,6 +1244,9 @@ The following options need to be configured: CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the txfilltuning field in the EHCI controller on reset. + CONFIG_USB_HUB_MIN_POWER_ON_DELAY defines the minimum + interval for usb hub power-on delay.(minimum 100msec) + - USB Device: Define the below if you wish to use the USB console. Once firmware is rebuilt from a serial console issue the diff --git a/common/usb_hub.c b/common/usb_hub.c index b5eeb62..0db3530 100644 --- a/common/usb_hub.c +++ b/common/usb_hub.c @@ -61,6 +61,12 @@ #define USB_HUB_DEBUG 0 #endif +#if CONFIG_USB_HUB_MIN_POWER_ON_DELAY > 100 +# define USB_HUB_MIN_POWER_ON_DELAY CONFIG_USB_HUB_MIN_POWER_ON_DELAY +#else +# define USB_HUB_MIN_POWER_ON_DELAY 100 +#endif + #define USB_PRINTF(fmt, args...) debug_cond(USB_DEBUG, fmt, ##args) #define USB_HUB_PRINTF(fmt, args...) debug_cond(USB_HUB_DEBUG, fmt, ##args) @@ -121,7 +127,7 @@ static void usb_hub_power_on(struct usb_hub_device *hub) } /* Wait at least 100 msec for power to become stable */ - mdelay(max(pgood_delay, (unsigned)100)); + mdelay(max(pgood_delay, USB_HUB_MIN_POWER_ON_DELAY)); } void usb_hub_reset(void) -- 1.7.9.5 _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
