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在 ubuntu 13.04 上，我为 CDMA 调制解调器编写的 udev 规则是 SUBSYSTEM=="tty", ATTRS{bInterfaceNumber}=="00", ATTRS{bNumEndpoints}=="03", ATTRS{product}=="ZTE CDMA Tech", ACTION=="add", SYMLINK+="CDMAModem"

和

$ sudo udevadm info -a -p $(sudo udevadm info -q path -n /dev/ttyUSB0)
Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/devices/ocp.2/47400000.usb/musb-hdrc.1.auto/usb1/1-1/1-1.4/1-1.4.3/1-1.4.3:1.0/ttyUSB0/tty/ttyUSB0':
    KERNEL=="ttyUSB0"
    SUBSYSTEM=="tty"
    DRIVER==""

  looking at parent device '/devices/ocp.2/47400000.usb/musb-hdrc.1.auto/usb1/1-1/1-1.4/1-1.4.3/1-1.4.3:1.0/ttyUSB0':
    KERNELS=="ttyUSB0"
    SUBSYSTEMS=="usb-serial"
    DRIVERS=="option1"
    ATTRS{port_number}=="0"

  looking at parent device '/devices/ocp.2/47400000.usb/musb-hdrc.1.auto/usb1/1-1/1-1.4/1-1.4.3/1-1.4.3:1.0':
    KERNELS=="1-1.4.3:1.0"
    SUBSYSTEMS=="usb"
    DRIVERS=="option"
    ATTRS{bInterfaceClass}=="ff"
    ATTRS{bInterfaceSubClass}=="ff"
    ATTRS{bInterfaceProtocol}=="ff"
    ATTRS{bNumEndpoints}=="03"
    ATTRS{supports_autosuspend}=="1"
    ATTRS{bAlternateSetting}==" 0"
    ATTRS{bInterfaceNumber}=="00"
    ATTRS{interface}=="Data Interface"

  looking at parent device '/devices/ocp.2/47400000.usb/musb-hdrc.1.auto/usb1/1-1/1-1.4/1-1.4.3':
    KERNELS=="1-1.4.3"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bDeviceProtocol}=="00"
    ATTRS{devpath}=="1.4.3"
    ATTRS{idVendor}=="19d2"
    ATTRS{speed}=="12"
    ATTRS{bNumInterfaces}==" 6"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{busnum}=="1"
    ATTRS{devnum}=="10"
    ATTRS{configuration}==""
    ATTRS{bMaxPower}=="500mA"
    ATTRS{authorized}=="1"
    ATTRS{bmAttributes}=="a0"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{maxchild}=="0"
    ATTRS{bcdDevice}=="0000"
    ATTRS{avoid_reset_quirk}=="1"
    ATTRS{quirks}=="0x10"
    ATTRS{version}==" 1.10"
    ATTRS{urbnum}=="266"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="ZTE, Incorporated"
    ATTRS{removable}=="unknown"
    ATTRS{idProduct}=="fff1"
    ATTRS{bDeviceClass}=="00"
    ATTRS{product}=="ZTE CDMA Tech"

  looking at parent device '/devices/ocp.2/47400000.usb/musb-hdrc.1.auto/usb1/1-1/1-1.4':
    KERNELS=="1-1.4"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{devpath}=="1.4"
    ATTRS{idVendor}=="05e3"
    ATTRS{speed}=="480"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{busnum}=="1"
    ATTRS{devnum}=="5"
    ATTRS{configuration}==""
    ATTRS{bMaxPower}=="100mA"
    ATTRS{authorized}=="1"
    ATTRS{bmAttributes}=="e0"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{maxchild}=="4"
    ATTRS{bcdDevice}=="7764"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{quirks}=="0x0"
    ATTRS{version}==" 2.00"
    ATTRS{urbnum}=="116"
    ATTRS{ltm_capable}=="no"
    ATTRS{removable}=="unknown"
    ATTRS{idProduct}=="0608"
    ATTRS{bDeviceClass}=="09"
    ATTRS{product}=="USB2.0 Hub"

  looking at parent device '/devices/ocp.2/47400000.usb/musb-hdrc.1.auto/usb1/1-1':
    KERNELS=="1-1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{devpath}=="1"
    ATTRS{idVendor}=="05e3"
    ATTRS{speed}=="480"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{busnum}=="1"
    ATTRS{devnum}=="2"
    ATTRS{configuration}==""
    ATTRS{bMaxPower}=="100mA"
    ATTRS{authorized}=="1"
    ATTRS{bmAttributes}=="e0"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{maxchild}=="4"
    ATTRS{bcdDevice}=="7764"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{quirks}=="0x0"
    ATTRS{version}==" 2.00"
    ATTRS{urbnum}=="67"
    ATTRS{ltm_capable}=="no"
    ATTRS{removable}=="unknown"
    ATTRS{idProduct}=="0608"
    ATTRS{bDeviceClass}=="09"
    ATTRS{product}=="USB2.0 Hub"

  looking at parent device '/devices/ocp.2/47400000.usb/musb-hdrc.1.auto/usb1':
    KERNELS=="usb1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{devpath}=="0"
    ATTRS{idVendor}=="1d6b"
    ATTRS{speed}=="480"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{authorized_default}=="1"
    ATTRS{busnum}=="1"
    ATTRS{devnum}=="1"
    ATTRS{configuration}==""
    ATTRS{bMaxPower}=="  0mA"
    ATTRS{authorized}=="1"
    ATTRS{bmAttributes}=="e0"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{maxchild}=="1"
    ATTRS{bcdDevice}=="0308"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{quirks}=="0x0"
    ATTRS{serial}=="musb-hdrc.1.auto"
    ATTRS{version}==" 2.00"
    ATTRS{urbnum}=="28"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="Linux 3.8.13-bone21 musb-hcd"
    ATTRS{removable}=="unknown"
    ATTRS{idProduct}=="0002"
    ATTRS{bDeviceClass}=="09"
    ATTRS{product}=="MUSB HDRC host driver"

  looking at parent device '/devices/ocp.2/47400000.usb/musb-hdrc.1.auto':
    KERNELS=="musb-hdrc.1.auto"
    SUBSYSTEMS=="platform"
    DRIVERS=="musb-hdrc"
    ATTRS{mode}=="b_peripheral"
    ATTRS{vbus}=="Vbus off, timeout 1100 msec"

  looking at parent device '/devices/ocp.2/47400000.usb':
    KERNELS=="47400000.usb"
    SUBSYSTEMS=="platform"
    DRIVERS=="musb-dsps"

  looking at parent device '/devices/ocp.2':
    KERNELS=="ocp.2"
    SUBSYSTEMS=="platform"
    DRIVERS==""

我哪里做错了？/dev/CDMAModem当我插入调制解调器时，我不明白。我也试过NAME代替SYMLINK+. /dev/ttyUSB0是我连接调制解调器时得到的设备文件。我也得到/dev/ttyUSB1,2,3,4了，但他们不响应 AT 命令。

stackoverflow 说要添加更多细节，因为我的问题主要包含代码，所以我正在输入这个。我找不到我能提供的任何进一步的细节。

4

1 回答 1

1

以下 udev 规则能够创建symlink

SUBSYSTEMS=="usb-serial", ACTION=="add", DRIVERS=="option1", SYMLINK+="CDMAModem%n"
SUBSYSTEMS=="usb-serial", ACTION=="remove", DRIVERS=="option1", SYMLINK-="CDMAModem%n"

$ ls /dev/CDMAModem*
/dev/CDMAModem0  /dev/CDMAModem1  /dev/CDMAModem2  /dev/CDMAModem3  /dev/CDMAModem4

我期望在规则中评估的设备属性应该属于同一个设备节点，从而得出了这条规则。所以我只取了一个节点的设备属性，/devices/ocp.2/47400000.usb/musb-hdrc.1.auto/usb1/1-1/1-1.4/1-1.4.3/1-1.4.3:1.0/ttyUSB0而且我认为它是最好的节点选择，因为它是顶部的第一个设备节点，它加载与调制解调器相对应的特定驱动程序（我不确定option1是调制解调器驱动程序这是一个猜测）。我应该重新启动系统以使其正常工作。

现在我解决了这个问题，但我想要确切的解决方案和理由。什么是option1驱动程序？我严重怀疑上述规则能否在其他调制解调器中独占识别调制解调器。

于 2013-07-26T15:20:13.370 回答