IMX6UL cannot detect USB

maxime_metayer — Tue, 26 Feb 2019 11:08:38 GMT

Hi everyone,

I can not detect usb stick on my custom board.

We have developed an electronic card based on the CL-SOM-IMX6UL system-on-module.

Here is the electrical diagram for the usb part de notre card:

we used Pin 170&172 for USB2_D_N , USB2_D_P and Pin 176&178 USB_OTG1_DN, USB_OTG1_DP

I think my device tree is wrong, so would you tell me how to modify it?

related part of my device tree is as follows:

imx6ul-cl-som-imx6ul.dtsi

pinctrl_usb_otg1_id: usbotg1idgrp {

fsl,pins = <

MX6UL_PAD_GPIO1_IO00__ANATOP_OTG1_ID 0x17059

};

pinctrl_usb_otg1: usbotg1grp {

fsl,pins = <

MX6UL_PAD_GPIO1_IO04__GPIO1_IO04 0x10b0

};

&usbotg1 {

vbus-supply = <&reg_usb_otg1_vbus>;

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_usb_otg1_id>;

dr_mode = "otg";

status = "okay";

};

&usbotg2 {

dr_mode = "host";

disable-over-current;

status = "okay";

};

reg_usb_otg1_vbus: regulator@1 {

compatible = "regulator-fixed";

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_usb_otg1>;

regulator-name = "usb_otg1_vbus";

regulator-min-microvolt = <5000000>;

regulator-max-microvolt = <5000000>;

gpio = <&gpio1 4 GPIO_ACTIVE_HIGH>;

enable-active-high;

};

imx6ul.dtsi:

usbphy1: usbphy@020c9000 {
compatible = "fsl,imx6ul-usbphy", "fsl,imx23-usbphy";
reg = <0x020c9000 0x1000>;
interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX6UL_CLK_USBPHY1>;
phy-3p0-supply = <&reg_3p0>;
fsl,anatop = <&anatop>;
};

usbphy2: usbphy@020ca000 {
compatible = "fsl,imx6ul-usbphy", "fsl,imx23-usbphy";
reg = <0x020ca000 0x1000>;
interrupts = <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX6UL_CLK_USBPHY2>;
phy-3p0-supply = <&reg_3p0>;
fsl,anatop = <&anatop>;
};

aips2: aips-bus@02100000 {
compatible = "fsl,aips-bus", "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
reg = <0x02100000 0x100000>;
ranges;

usbotg1: usb@02184000 {
compatible = "fsl,imx6ul-usb", "fsl,imx27-usb";
reg = <0x02184000 0x200>;
interrupts = <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX6UL_CLK_USBOH3>;
fsl,usbphy = <&usbphy1>;
fsl,usbmisc = <&usbmisc 0>;
fsl,anatop = <&anatop>;
ahb-burst-config = <0x0>;
tx-burst-size-dword = <0x10>;
rx-burst-size-dword = <0x10>;
status = "disabled";
};

usbotg2: usb@02184200 {
compatible = "fsl,imx6ul-usb", "fsl,imx27-usb";
reg = <0x02184200 0x200>;
interrupts = <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX6UL_CLK_USBOH3>;
fsl,usbphy = <&usbphy2>;
fsl,usbmisc = <&usbmisc 1>;
ahb-burst-config = <0x0>;
tx-burst-size-dword = <0x10>;
rx-burst-size-dword = <0x10>;
status = "okay";
};

usbmisc: usbmisc@02184800 {
#index-cells = <1>;
compatible = "fsl,imx6ul-usbmisc", "fsl,imx6q-usbmisc";
reg = <0x02184800 0x200>;
};

I checked "dmesg", and "lsusb", but usb stick is not recognized. but i have this message with dmesg :

[351474.050771] usb 1-1: new high-speed USB device number 57 using ci_hdrc
[351474.560820] usb 1-1: new high-speed USB device number 59 using ci_hdrc
[351474.960890] usb 1-1: new high-speed USB device number 60 using ci_hdrc
[351475.362163] usb 1-1: new high-speed USB device number 61 using ci_hdrc
[351475.760674] usb 1-1: new high-speed USB device number 62 using ci_hdrc
[351476.160628] usb 1-1: new high-speed USB device number 63 using ci_hdrc
[351476.560872] usb 1-1: new high-speed USB device number 64 using ci_hdrc
[351477.080729] usb 1-1: new high-speed USB device number 66 using ci_hdrc
[351477.600566] usb 1-1: new high-speed USB device number 68 using ci_hdrc
[351478.000554] usb 1-1: new high-speed USB device number 69 using ci_hdrc
[351478.400572] usb 1-1: new high-speed USB device number 70 using ci_hdrc
[351478.910570] usb 1-1: new high-speed USB device number 72 using ci_hdrc
[351479.420543] usb 1-1: new high-speed USB device number 74 using ci_hdrc
[351479.820486] usb 1-1: new high-speed USB device number 75 using ci_hdrc
[351480.220427] usb 1-1: new high-speed USB device number 76 using ci_hdrc
[351480.730823] usb 1-1: new high-speed USB device number 78 using ci_hdrc
[351481.130351] usb 1-1: new high-speed USB device number 79 using ci_hdrc
[351481.640348] usb 1-1: new high-speed USB device number 81 using ci_hdrc
[351482.040340] usb 1-1: new high-speed USB device number 82 using ci_hdrc
[351482.550393] usb 1-1: new high-speed USB device number 84 using ci_hdrc
[351483.060663] usb 1-1: new high-speed USB device number 86 using ci_hdrc
[351483.580386] usb 1-1: new high-speed USB device number 88 using ci_hdrc
[351483.990364] usb 1-1: new high-speed USB device number 89 using ci_hdrc
[351484.510447] usb 1-1: new high-speed USB device number 91 using ci_hdrc
[351484.920235] usb 1-1: new high-speed USB device number 92 using ci_hdrc

Re: IMX6UL cannot detect USB

CarlosCasillas — Tue, 26 Feb 2019 21:45:52 GMT

Hi Romain,

The CL-SOM-IMX6UL board is not from NXP, so, you may contact to Compulab in case of requiring assistance configuring the custom hardware to match with the software.

However, as a general recommendation, you may check the following points:

The CL-SOM-IMX6UL board provides OTG+Host options, so, first you need to ensure on which port of your board you are connecting the Device. If you are connecting a Device, it must be connected to a Host port, or to a OTG port in Host mode (pulling down the ID pin), otherwise, communication will not be established.
If you are modifying the Device Tree, you are modifying the pin assignment (for example, the ID pin); however, it will be also required modify the driver on where it asks for the status of such unassigned pins.

Hope this will be useful for you.
Best regards!
/Carlos
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Re: IMX6UL cannot detect USB

maxime_metayer — Wed, 27 Feb 2019 14:26:29 GMT

Hi Carlos,

Thank you very much for your answer ! Can you tell me how to pulling down the ID pin ?

Thank you in advance.

Romain

Re: IMX6UL cannot detect USB

CarlosCasillas — Sat, 02 Mar 2019 02:25:09 GMT

Hi Romain,

The pulling-down of the ID pin is basically connected this pin to ground. This connection in usually implemented by the external OTG-to-Host adapters.

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