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832b9cbd74
where to begin? the USB regulator settings were just
a part of the issue. With them changed, according to
the forum it still failed when a USB device was
connected to the port with:
dwc2 4bff80000.usbotg: dwc2_restore_global_registers: no global registers to restore
dwc2 4bff80000.usbotg: dwc2_exit_partial_power_down: failed to restore registers
dwc2 4bff80000.usbotg: exit partial_power_down failed
dwc2 4bff80000.usbotg: HC died; cleaning up
One clue was found upstream in
commit cc10ce0c51b1 ("usb: dwc2: disable power_down on Amlogic devices")
|Disable power_down by setting the parameter to
|DWC2_POWER_DOWN_PARAM_NONE. This fixes a problem on various Amlogic
|Meson SoCs where USB devices are only recognized when plugged in before
|booting Linux. A hot-plugged USB device was not detected even though the
|device got power (my USB thumb drive for example has an LED which lit
|up).
|[...]
the same method proposed there worked with APM821xx's USB IP-Core.
Link: https://forum.openwrt.org/t/wd-my-book-duo-usb/111926/2
Reported-by: thwe and takimata (openwrt forum)
Fixes: b70d3557e0 ("apm821xx: clean up gpio-hogs")
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
30 lines
1.2 KiB
Diff
30 lines
1.2 KiB
Diff
From 88ca61467a0897c79b1fbf8f5c30691b43b52613 Mon Sep 17 00:00:00 2001
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From: Christian Lamparter <chunkeey@gmail.com>
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Date: Sun, 26 Dec 2021 22:36:29 +0200
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Subject: [PATCH] dwc2: temporary force to be powered up all times
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the APM821xx's onchip dwc2 misbehaves with 5.4 and 5.10
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when a USB device gets connected. Instead of announcing
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and setting up the USB devices it crashes and burns with:
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[ 22.023476] dwc2 4bff80000.usbotg: dwc2_restore_global_registers: no global registers to restore
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[ 22.032245] dwc2 4bff80000.usbotg: dwc2_exit_partial_power_down: failed to restore registers
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[ 22.040647] dwc2 4bff80000.usbotg: exit partial_power_down failed
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[ 22.058765] dwc2 4bff80000.usbotg: HC died; cleaning up
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This is all seemingly fixed with dwc2 from a 5.16-rc6.
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Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
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---
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--- a/drivers/usb/dwc2/params.c
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+++ b/drivers/usb/dwc2/params.c
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@@ -137,6 +137,7 @@ static void dwc2_set_amcc_params(struct
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struct dwc2_core_params *p = &hsotg->params;
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p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
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+ p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
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}
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static void dwc2_set_stm32f4x9_fsotg_params(struct dwc2_hsotg *hsotg)
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