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am335x的根文件系统

ZB_LAJI
Intellectual 980 points


使用PROCESSOR-SDK-LINUX-AM335X  06_03_00_106的arago-base-tisdk-image-am335x-evm   作为根文件系统时，插入USB，系统无法读取信息。

但使用tisdk-rootfs-image-am335x-evm时，却能读取USB信息，且能正常使用，请问这是怎么回事

使用arago-base-tisdk-image-am335x-evm 时与usb相关log：

[ 22.573840] am335x-phy-driver 47401300.usb-phy: using lookup tables for GPIO lookup
[ 22.573849] am335x-phy-driver 47401300.usb-phy: No GPIO consumer reset found
[ 22.573858] am335x-phy-driver 47401300.usb-phy: GPIO lookup for consumer vbus-detect
[ 22.573864] am335x-phy-driver 47401300.usb-phy: using device tree for GPIO lookup
[ 22.573880] of_get_named_gpiod_flags: can't parse 'vbus-detect-gpios' property of node '/ocp/usb@47400000/usb-phy@47401300[0]'
[ 22.573894] of_get_named_gpiod_flags: can't parse 'vbus-detect-gpio' property of node '/ocp/usb@47400000/usb-phy@47401300[0]'
[ 22.573902] am335x-phy-driver 47401300.usb-phy: using lookup tables for GPIO lookup
[ 22.573909] am335x-phy-driver 47401300.usb-phy: No GPIO consumer vbus-detect found
[ 22.574034] am335x-phy-driver 47401300.usb-phy: 47401300.usb-phy supply vcc not found, using dummy regulator
[ 22.645629] input: ti-tsc as /devices/platform/ocp/44e0d000.tscadc/TI-am335x-tsc.0.auto/input/input0
[ 22.702837] am335x-phy-driver 47401300.usb-phy: Linked as a consumer to regulator.0
[ 23.108968] usbcore: registered new interface driver usbfs
[ 23.202916] usbcore: registered new interface driver hub
[ 23.261219] usbcore: registered new device driver usb
[ 23.630205] musb-hdrc musb-hdrc.0: MUSB HDRC host driver
[ 23.730783] musb-hdrc musb-hdrc.0: new USB bus registered, assigned bus number 1
[ 23.785430] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 4.19
[ 23.850832] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 23.858133] usb usb1: Product: MUSB HDRC host driver
[ 23.955401] usb usb1: Manufacturer: Linux 4.19.94-gbe5389fd85 musb-hcd
[ 24.020327] usb usb1: SerialNumber: musb-hdrc.0
[ 24.055568] hub 1-0:1.0: USB hub found

  • 0
    TI__Guru** 110395 points
    使用tisdk-rootfs-image-am335x-evm时,读取的信息可以贴出来看一下吗？
  • 0 回复 Nancy Wang
    Intellectual 980 points

    插入usb后，串口打印信息：
    root@am335x-evm:~#
    root@am335x-evm:~# [ 110.380651] usb 1-1: new high-speed USB device number 3 using musb-hdrc
    [ 110.565341] usb 1-1: New USB device found, idVendor=05e3, idProduct=0749, bcdDevice=15.35
    [ 110.573752] usb 1-1: New USB device strings: Mfr=3, Product=4, SerialNumber=2
    [ 110.584078] usb 1-1: Product: USB3.0 Card Reader
    [ 110.588760] usb 1-1: Manufacturer: Generic
    [ 110.595708] usb 1-1: SerialNumber: 000000001536
    [ 110.609836] usb-storage 1-1:1.0: USB Mass Storage device detected
    [ 110.631298] scsi host0: usb-storage 1-1:1.0
    [ 111.683025] scsi 0:0:0:0: Direct-Access Generic MassStorageClass 1536 PQ: 0 ANSI: 6
    [ 112.026921] sd 0:0:0:0: [sda] 62521344 512-byte logical blocks: (32.0 GB/29.8 GiB)
    [ 112.036489] sd 0:0:0:0: [sda] Write Protect is off
    [ 112.047287] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
    [ 112.070279] sda: sda1
    [ 112.086261] sd 0:0:0:0: [sda] Attached SCSI removable disk

    root@am335x-evm:~#


    启动时，相关log：
    [ 21.943007] am335x-phy-driver 47401300.usb-phy: GPIO lookup for consumer reset
    [ 21.943026] am335x-phy-driver 47401300.usb-phy: using device tree for GPIO lookup
    [ 21.943062] of_get_named_gpiod_flags: can't parse 'reset-gpios' property of node '/ocp/usb@47400000/usb-phy@47401300[0]'
    [ 21.943080] of_get_named_gpiod_flags: can't parse 'reset-gpio' property of node '/ocp/usb@47400000/usb-phy@47401300[0]'
    [ 21.943091] am335x-phy-driver 47401300.usb-phy: using lookup tables for GPIO lookup
    [ 21.943099] am335x-phy-driver 47401300.usb-phy: No GPIO consumer reset found
    [ 21.943108] am335x-phy-driver 47401300.usb-phy: GPIO lookup for consumer vbus-detect
    [ 21.943114] am335x-phy-driver 47401300.usb-phy: using device tree for GPIO lookup
    [ 21.943130] of_get_named_gpiod_flags: can't parse 'vbus-detect-gpios' property of node '/ocp/usb@47400000/usb-phy@47401300[0]'
    [ 21.943145] of_get_named_gpiod_flags: can't parse 'vbus-detect-gpio' property of node '/ocp/usb@47400000/usb-phy@47401300[0]'
    [ 21.943152] am335x-phy-driver 47401300.usb-phy: using lookup tables for GPIO lookup
    [ 21.943159] am335x-phy-driver 47401300.usb-phy: No GPIO consumer vbus-detect found
    [ 21.943284] am335x-phy-driver 47401300.usb-phy: 47401300.usb-phy supply vcc not found, using dummy regulator
    [ 22.076190] am335x-phy-driver 47401300.usb-phy: Linked as a consumer to regulator.0
    [ 22.178240] musb-hdrc musb-hdrc.0: MUSB HDRC host driver
    [ 22.264409] musb-hdrc musb-hdrc.0: new USB bus registered, assigned bus number 1
    [ 22.384087] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 4.19
    [ 22.472593] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    [ 22.541977] usb usb1: Product: MUSB HDRC host driver
    [ 22.589992] usb usb1: Manufacturer: Linux 4.19.94-gbe5389fd85 musb-hcd
    [ 22.665110] usb usb1: SerialNumber: musb-hdrc.0
    [ 22.713177] hub 1-0:1.0: USB hub found

  • 0 回复 ZB_LAJI
    TI__Guru** 110395 points
    我咨询一下相关工程师，再给你回复。
  • 0 回复 ZB_LAJI
    TI__Guru** 110395 points
    抱歉再确认一下，在两个文件系统下usb都是能正常工作的吗？
    您想咨询的是不通文件系统下终端输出调试信息的不同吗？
  • 0 回复 Nancy Wang
    Intellectual 980 points

    不对，

    使用arago-base-tisdk-image-am335x-evm   根文件系统是usb未正常工作，无插拔信息提示，也不能读取数据。

    使用tisdk-rootfs-image-am335x-evm才能使用正常使用

  • 0 回复 ZB_LAJI
    TI__Guru** 110395 points
    AM335x USB端口是host还是OTG模式？该模式由内核设备树中的dr_mode属性定义。
    如果处于“ otg”模式，请在两种情况下分别提供以下命令的输出。
    root@am335x-evm:~# cat /sys/class/udc/musb-hdrc.0/uevent
  • 0 回复 Nancy Wang
    Intellectual 980 points

    检查了一下，发现设备树中的 dr_mode 没有定义，现在添加dr_mode 为 host。

    添加后，均可识别USB，并成功读写数据。

    但插入USB后串口信息中“”Write cache: disabled, read cache: enabled, doesn't support DPO or FUA“”是什么意思？是否会影响使用？

    [ 78.335004] usb 1-1: New USB device found, idVendor=05e3, idProduct=0749, bcdDevice=15.35
    [ 78.343361] usb 1-1: New USB device strings: Mfr=3, Product=4, SerialNumber=2
    [ 78.353520] usb 1-1: Product: USB3.0 Card Reader
    [ 78.358198] usb 1-1: Manufacturer: Generic
    [ 78.365121] usb 1-1: SerialNumber: 000000001536
    [ 78.432026] usb-storage 1-1:1.0: USB Mass Storage device detected
    [ 78.446284] scsi host0: usb-storage 1-1:1.0
    [ 78.457608] usbcore: registered new interface driver usb-storage
    [ 78.476455] usbcore: registered new interface driver uas
    [ 79.522842] scsi 0:0:0:0: Direct-Access Generic MassStorageClass 1536 PQ: 0 ANSI: 6
    [ 79.835726] sd 0:0:0:0: [sda] 62333952 512-byte logical blocks: (31.9 GB/29.7 GiB)
    [ 79.844950] sd 0:0:0:0: [sda] Write Protect is off
    [ 79.861614] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
    [ 79.885551] sda: sda1
    [ 79.898068] sd 0:0:0:0: [sda] Attached SCSI removable disk

  • 0 回复 ZB_LAJI
    TI__Guru** 110395 points
    这表示禁用了写缓存，这是为了最大程度地减少系统电源故障中的数据丢失。
    DPO和FUA是SCSI参数，通常不适用于USB thumb drives。