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authorMarcel Ziswiler <marcel.ziswiler@toradex.com>2012-11-09 15:37:05 +0100
committerMarcel Ziswiler <marcel.ziswiler@toradex.com>2012-11-09 15:37:05 +0100
commit9680bdaeeb0af9d41f6b96ce45dc72b268a6aafa (patch)
tree2b7813430f92c6ad5164b257c228d47c1cf11f9f
parent4fbbacf8fd32cf14771c791b922c8e3e828b3add (diff)
colibri_t20: USB: fix Ethernet detection fault
Turns out we completely missed properly resetting the ASIX USB to FastEthernet chip which from time-to-time on certain modules caused severe Ethernet detection faults only a complete hardware reset or power-cycle could eliminate. Properly resetting the chip for 5 microseconds after VBUS is stable seems to fix the issue.
-rw-r--r--board/toradex/common/usb.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/board/toradex/common/usb.c b/board/toradex/common/usb.c
index 63accf83944..f0f4a474537 100644
--- a/board/toradex/common/usb.c
+++ b/board/toradex/common/usb.c
@@ -212,6 +212,15 @@ void usbf_reset_controller(enum periph_id id, struct usb_ctlr *usbctlr)
/* Enable ASIX AX88772B V_BUS */
gpio_direction_output(GPIO_PBB1, 1);
pinmux_tristate_disable(PINGRP_DTE);
+
+ /* Reset */
+ gpio_direction_output(GPIO_PV4, 0);
+ pinmux_tristate_disable(PINGRP_GPV);
+
+ udelay(5);
+
+ /* Unreset */
+ gpio_set_value(GPIO_PV4, 1);
}
/*