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apm821xx: fix WD MyBook Live DUO USB-Port

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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: b70d3557e05 ("apm821xx: clean up gpio-hogs")
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
This commit is contained in:
Christian Lamparter 2021-12-24 14:44:08 +01:00
parent cf8ee49c9b
commit 832b9cbd74
2 changed files with 32 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
target/linux/apm821xx/dts/wd-mybooklive.dts
View File

@ -123,9 +123,11 @@
usbpwr: usb-regulator {
compatible = "regulator-fixed";
regulator-name = "Power USB Core";
gpios = <&GPIO1 2 GPIO_ACTIVE_LOW>;
gpios = <&GPIO1 2 GPIO_ACTIVE_HIGH>;
regulator-min-microvolt = <5000000>;
regulator-max-microvolt = <5000000>;
regulator-boot-on; /* uboot sets this */
enable-active-high;
};
sata1pwr: sata1-regulator {

29
target/linux/apm821xx/patches-5.10/100-dwc2-disable-powerdown.patch Normal file
View File

@ -0,0 +1,29 @@
From 88ca61467a0897c79b1fbf8f5c30691b43b52613 Mon Sep 17 00:00:00 2001
From: Christian Lamparter <chunkeey@gmail.com>
Date: Sun, 26 Dec 2021 22:36:29 +0200
Subject: [PATCH] dwc2: temporary force to be powered up all times
the APM821xx's onchip dwc2 misbehaves with 5.4 and 5.10
when a USB device gets connected. Instead of announcing
and setting up the USB devices it crashes and burns with:
[ 22.023476] dwc2 4bff80000.usbotg: dwc2_restore_global_registers: no global registers to restore
[ 22.032245] dwc2 4bff80000.usbotg: dwc2_exit_partial_power_down: failed to restore registers
[ 22.040647] dwc2 4bff80000.usbotg: exit partial_power_down failed
[ 22.058765] dwc2 4bff80000.usbotg: HC died; cleaning up
This is all seemingly fixed with dwc2 from a 5.16-rc6.
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
---
--- a/drivers/usb/dwc2/params.c
+++ b/drivers/usb/dwc2/params.c
@@ -137,6 +137,7 @@ static void dwc2_set_amcc_params(struct
struct dwc2_core_params *p = &hsotg->params;
p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
+ p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
}
static void dwc2_set_stm32f4x9_fsotg_params(struct dwc2_hsotg *hsotg)