AnsweredAssumed Answered

imx6solo USB OTG识别

Question asked by qiang xie on Apr 12, 2019
Latest reply on Apr 14, 2019 by igorpadykov

大家好,

 

            目前使用BSP为yocto L4.1.15-2.1.0,芯片为imx6solo。

 

            目前在使用OTG功能验证时,OTG做device连接PC是没有问题的,但是做host连接U盘时,串口不断的重复打印以下信息,从log来看,是识别了又断开了,不知道是什么问题,请大家帮忙,谢谢。

 

            1.OTG什么都不接的时候,测量ID pin默认被硬件拉高。

            2.OTG连接U盘,测量到ID pin上的电阻,一边为低电平,另一边为高电平。

            3.OTG设备树配置如下:

            reg_usb_otg_vbus: regulator@2 {
                  compatible = "regulator-fixed";
                  reg = <2>;
                  regulator-name = "usb_otg_vbus";
                  regulator-min-microvolt = <5000000>;
                  regulator-max-microvolt = <5000000>;
                  gpio = <&gpio4 15 0>;
                  enable-active-high;
            };

 

            &usbotg {
                   vbus-supply = <&reg_usb_otg_vbus>;
                   pinctrl-names = "default";
                   pinctrl-0 = <&pinctrl_usbotg>;
                   disable-over-current;
                   dr_mode = "otg";
                   status = "okay";
            };

 

            pinctrl_usbotg: usbotggrp {
                  fsl,pins = <
                      MX6QDL_PAD_ENET_RX_ER__USB_OTG_ID     0x17059
                      MX6QDL_PAD_KEY_ROW4__GPIO4_IO15           0x000b0  
                      MX6QDL_PAD_KEY_COL4__USB_OTG_OC        0x1b0b0
                  >;
            };

 

            4.串口打印的log如下:

            [   16.472251] ci_hdrc ci_hdrc.0: EHCI Host Controller
            [   16.477287] ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus number 2
            [   16.503505] ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI 1.00
            [   16.519682] hub 2-0:1.0: USB hub found
            [   16.526416] hub 2-0:1.0: 1 port detected
            [   16.853481] usb 2-1: new high-speed USB device number 2 using ci_hdrc
            [   17.014197] usb-storage 2-1:1.0: USB Mass Storage device detected
            [   17.034759] scsi host0: usb-storage 2-1:1.0
            [   17.343434] usb 2-1: USB disconnect, device number 2
            [   17.633467] usb 2-1: new high-speed USB device number 3 using ci_hdrc
            [   17.794203] usb-storage 2-1:1.0: USB Mass Storage device detected
            [   17.813568] scsi host1: usb-storage 2-1:1.0
            [   18.150407] usb 2-1: USB disconnect, device number 3
            [   18.433486] usb 2-1: new high-speed USB device number 4 using ci_hdrc
            [   18.594197] usb-storage 2-1:1.0: USB Mass Storage device detected
            [   18.613572] scsi host2: usb-storage 2-1:1.0
            [   18.958404] usb 2-1: USB disconnect, device number 4
            [   19.243495] usb 2-1: new high-speed USB device number 5 using ci_hdrc
            [   19.404199] usb-storage 2-1:1.0: USB Mass Storage device detected
            [   19.423567] scsi host3: usb-storage 2-1:1.0
            [   19.766400] usb 2-1: USB disconnect, device number 5
            [   20.053460] usb 2-1: new high-speed USB device number 6 using ci_hdrc
            [   20.214189] usb-storage 2-1:1.0: USB Mass Storage device detected
            [   20.233568] scsi host4: usb-storage 2-1:1.0
            [   20.574400] usb 2-1: USB disconnect, device number 6
            [   20.863482] usb 2-1: new high-speed USB device number 7 using ci_hdrc
            [   21.024202] usb-storage 2-1:1.0: USB Mass Storage device detected
            [   21.043618] scsi host5: usb-storage 2-1:1.0
            [   21.382407] usb 2-1: USB disconnect, device number 7
            [   21.673483] usb 2-1: new high-speed USB device number 8 using ci_hdrc
            [   21.834198] usb-storage 2-1:1.0: USB Mass Storage device detected
            [   21.853568] scsi host6: usb-storage 2-1:1.0
            [   22.189413] usb 2-1: USB disconnect, device number 8
            [   22.473483] usb 2-1: new high-speed USB device number 9 using ci_hdrc
            [   22.634200] usb-storage 2-1:1.0: USB Mass Storage device detected
            [   22.653756] scsi host7: usb-storage 2-1:1.0
            [   22.997402] usb 2-1: USB disconnect, device number 9

Outcomes