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usb: hub: allow to increase HUB_DEBOUNCE_TIMEOUT

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Add a new CONFIG_USB_HUB_DEBOUNCE_TIMEOUT to increase the
HUB_DEBOUNCE_TIMEOUT value, for example to 2s because some usb device
needs around 1.5s or more to make the hub port status to be
connected steadily after being powered off and powered on.

This 2s value is aligned with Linux driver and avoids to configure
"usb_pgood_delay" as a workaround for connection timeout on
some USB device; normally the env variable "usb_pgood_delay" is used
to delay the first query after power ON and thus the device answer,
but this variable not used to increase the connection timeout delay.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
This commit is contained in:
Patrick Delaunay 2022-09-09 11:45:23 +02:00 committed by Marek Vasut
parent fe4c21de4f
commit 5454dea313
2 changed files with 13 additions and 1 deletions
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12
common/Kconfig
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@ -1099,3 +1099,15 @@ config FDT_SIMPLEFB
config IO_TRACE
bool
config USB_HUB_DEBOUNCE_TIMEOUT
int "Timeout in milliseconds for USB HUB connection"
depends on USB
default 1000
help
Value in milliseconds of the USB connection timeout, the max delay to
wait the hub port status to be connected steadily after being powered
off and powered on in the usb hub driver.
This define allows to increase the HUB_DEBOUNCE_TIMEOUT default
value = 1s because some usb device needs around 1.5s to be initialized
and a 2s value should solve detection issue on problematic USB keys.

2
common/usb_hub.c
View File

@ -47,7 +47,7 @@
#define HUB_SHORT_RESET_TIME 20
#define HUB_LONG_RESET_TIME 200
#define HUB_DEBOUNCE_TIMEOUT 1000
#define HUB_DEBOUNCE_TIMEOUT CONFIG_USB_HUB_DEBOUNCE_TIMEOUT
#define PORT_OVERCURRENT_MAX_SCAN_COUNT 3