Linux Udev规则匹配Ralink Wifi卡并加载rt2800usb_Linux_Linux Kernel_Linux Device Driver_Embedded Linux_Udev

Linux Udev规则匹配Ralink Wifi卡并加载rt2800usb

linux linux-kernel

Linux Udev规则匹配Ralink Wifi卡并加载rt2800usb,linux,linux-kernel,linux-device-driver,embedded-linux,udev,Linux,Linux Kernel,Linux Device Driver,Embedded Linux,Udev,我一直在开发一个简单的Linux固件来加载一个需要驱动程序rt2800usb的Ralink wifi卡。固件在相关位置包含文件rt2800usb，启动udev守护进程，并具有与卡属性匹配的规则这是我最初用来匹配卡片的规则： KERNEL=="wlan*", ATTRS{manufacturer}=="Ralink", NAME="wificard%E{SLOT}" 尽管规则与卡的属性匹配，但它不会加载卡的rt2800usb驱动程序我使用udevadm触发器--attr match=manu

我一直在开发一个简单的Linux固件来加载一个需要驱动程序rt2800usb的Ralink wifi卡。固件在相关位置包含文件

rt2800usb

，启动udev守护进程，并具有与卡属性匹配的规则

这是我最初用来匹配卡片的规则：

KERNEL=="wlan*", ATTRS{manufacturer}=="Ralink", NAME="wificard%E{SLOT}"

尽管规则与卡的属性匹配，但它不会加载卡的

rt2800usb

驱动程序

我使用udevadm触发器--attr match=manufacturer=“Ralink”检查了这个问题，我看到了同样的情况，它拾取设备路径，但不加载驱动程序

有一条规则似乎可以加载驱动程序，那就是：

udevadm trigger --verbose --parent-match=/sys/devices/pci0000\:00/0000\:00\:0f.5/usb1/1-2/1-2\:1.0/

然而，就我对udev的理解而言，这条规则将触发插入特定USB插槽的任何设备。我正在尝试修改这条规则，使其仅适用于一张RAINK卡。我已尝试添加

--attr match=manufacturer=“Ralink”

，但该规则不再匹配

如果有人能帮我解释一下，我会非常感激，特别是为什么有些udev比赛会启动驱动程序，而其他比赛不会

这里还有

udevadm info--attribute walk udevadm info--attribute walk--path=/sys/devices/pci0000 \：00/0000 \：00 \：0f.5/usb1/1-2/1-2 \：1.0

：

looking at device '/devices/pci0000:00/0000:00:0f.5/usb1/1-2/1-2:1.0':
KERNEL=="1-2:1.0"
SUBSYSTEM=="usb"
DRIVER=="rt2800usb"
ATTR{bInterfaceClass}=="ff"
ATTR{bInterfaceSubClass}=="ff"
ATTR{bInterfaceProtocol}=="ff"
ATTR{bNumEndpoints}=="07"
ATTR{supports_autosuspend}=="0"
ATTR{bAlternateSetting}==" 0"
ATTR{bInterfaceNumber}=="00"
ATTR{interface}=="1.0"

looking at parent device '/devices/pci0000:00/0000:00:0f.5/usb1/1-2':
KERNELS=="1-2"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{bDeviceSubClass}=="00"
ATTRS{bDeviceProtocol}=="00"
ATTRS{devpath}=="2"
ATTRS{idVendor}=="148f"
ATTRS{speed}=="480"
ATTRS{bNumInterfaces}==" 1"
ATTRS{bConfigurationValue}=="1"
ATTRS{bMaxPacketSize0}=="64"
ATTRS{busnum}=="1"
ATTRS{devnum}=="2"
ATTRS{configuration}==""
ATTRS{bMaxPower}=="450mA"
ATTRS{authorized}=="1"
ATTRS{bmAttributes}=="80"
ATTRS{bNumConfigurations}=="1"
ATTRS{maxchild}=="0"
ATTRS{bcdDevice}=="0101"
ATTRS{avoid_reset_quirk}=="0"
ATTRS{quirks}=="0x0"
ATTRS{serial}=="1.0"
ATTRS{version}==" 2.00"
ATTRS{urbnum}=="2719"
ATTRS{ltm_capable}=="no"
ATTRS{manufacturer}=="Ralink"
ATTRS{removable}=="unknown"
ATTRS{idProduct}=="5370"
ATTRS{bDeviceClass}=="00"
ATTRS{product}=="802.11 n WLAN"

looking at parent device '/devices/pci0000:00/0000:00:0f.5/usb1':
KERNELS=="usb1"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{bDeviceSubClass}=="00"
ATTRS{bDeviceProtocol}=="00"
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}=="4"
ATTRS{bcdDevice}=="0312"
ATTRS{avoid_reset_quirk}=="0"
ATTRS{quirks}=="0x0"
ATTRS{serial}=="0000:00:0f.5"
ATTRS{version}==" 2.00"
ATTRS{urbnum}=="40"
ATTRS{ltm_capable}=="no"
ATTRS{manufacturer}=="Linux 3.12.9 ehci_hcd"
ATTRS{removable}=="unknown"
ATTRS{idProduct}=="0002"
ATTRS{bDeviceClass}=="09"
ATTRS{product}=="EHCI Host Controller"

looking at parent device '/devices/pci0000:00/0000:00:0f.5':
KERNELS=="0000:00:0f.5"
SUBSYSTEMS=="pci"
DRIVERS=="ehci-pci"
ATTRS{irq}=="12"
ATTRS{subsystem_vendor}=="0x1022"
ATTRS{broken_parity_status}=="0"
ATTRS{class}=="0x0c0320"
ATTRS{companion}==""
ATTRS{consistent_dma_mask_bits}=="32"
ATTRS{dma_mask_bits}=="32"
ATTRS{local_cpus}=="1"
ATTRS{device}=="0x2095"
ATTRS{uframe_periodic_max}=="100"
ATTRS{enable}=="1"
ATTRS{msi_bus}==""
ATTRS{local_cpulist}=="0"
ATTRS{vendor}=="0x1022"
ATTRS{subsystem_device}=="0x2095"

looking at parent device '/devices/pci0000:00':
KERNELS=="pci0000:00"
SUBSYSTEMS==""
DRIVERS==""

(一)

(二)

1）此规则检测到USB适配器插入，但未链接。我将此规则用于重新启动网络、udhcpd和hostapd（主模式）。重新启动网络服务导致固件加载和wlan获取IP地址；-）

2）我使用从Compat driver编译的驱动程序，firmare的加载成功：

子系统==“compat_固件”，操作==“添加”，运行+=“compat_固件.sh”

#!/bin/sh -e

FIRMWARE_DIRS="/lib/firmware/updates/$(uname -r) /lib/firmware/updates \
               /lib/firmware/$(uname -r) /lib/firmware"

err() {
        echo "$@" >&2
        logger -t "${0##*/}[$$]" "$@" 2>/dev/null || true
}

if [ ! -e /sys$DEVPATH/loading ]; then
        err "udev firmware loader misses sysfs directory"
        exit 1
fi

for DIR in $FIRMWARE_DIRS; do
        [ -e "$DIR/$FIRMWARE" ] || continue
        echo 1 > /sys$DEVPATH/loading
        cat "$DIR/$FIRMWARE" > /sys$DEVPATH/data
        echo 0 > /sys$DEVPATH/loading
        exit 0
done

echo -1 > /sys$DEVPATH/loading
err "Cannot find  firmware file '$FIRMWARE'"
mkdir -p /dev/.udev/firmware-missing
file=$(echo "$FIRMWARE" | sed 's:/:\\x2f:g')
ln -s -f "$DEVPATH" /dev/.udev/firmware-missing/$file
exit 1

“compat_firmware.sh”代码

#!/bin/sh -e

FIRMWARE_DIRS="/lib/firmware/updates/$(uname -r) /lib/firmware/updates \
               /lib/firmware/$(uname -r) /lib/firmware"

err() {
        echo "$@" >&2
        logger -t "${0##*/}[$$]" "$@" 2>/dev/null || true
}

if [ ! -e /sys$DEVPATH/loading ]; then
        err "udev firmware loader misses sysfs directory"
        exit 1
fi

for DIR in $FIRMWARE_DIRS; do
        [ -e "$DIR/$FIRMWARE" ] || continue
        echo 1 > /sys$DEVPATH/loading
        cat "$DIR/$FIRMWARE" > /sys$DEVPATH/data
        echo 0 > /sys$DEVPATH/loading
        exit 0
done

echo -1 > /sys$DEVPATH/loading
err "Cannot find  firmware file '$FIRMWARE'"
mkdir -p /dev/.udev/firmware-missing
file=$(echo "$FIRMWARE" | sed 's:/:\\x2f:g')
ln -s -f "$DEVPATH" /dev/.udev/firmware-missing/$file
exit 1

对不起，我的英语不好

G+GustavoReyes71见我）

(二)

2）我使用从Compat driver编译的驱动程序，firmare的加载成功：

子系统==“compat_固件”，操作==“添加”，运行+=“compat_固件.sh”

#!/bin/sh -e

FIRMWARE_DIRS="/lib/firmware/updates/$(uname -r) /lib/firmware/updates \
               /lib/firmware/$(uname -r) /lib/firmware"

err() {
        echo "$@" >&2
        logger -t "${0##*/}[$$]" "$@" 2>/dev/null || true
}

if [ ! -e /sys$DEVPATH/loading ]; then
        err "udev firmware loader misses sysfs directory"
        exit 1
fi

for DIR in $FIRMWARE_DIRS; do
        [ -e "$DIR/$FIRMWARE" ] || continue
        echo 1 > /sys$DEVPATH/loading
        cat "$DIR/$FIRMWARE" > /sys$DEVPATH/data
        echo 0 > /sys$DEVPATH/loading
        exit 0
done

echo -1 > /sys$DEVPATH/loading
err "Cannot find  firmware file '$FIRMWARE'"
mkdir -p /dev/.udev/firmware-missing
file=$(echo "$FIRMWARE" | sed 's:/:\\x2f:g')
ln -s -f "$DEVPATH" /dev/.udev/firmware-missing/$file
exit 1

“compat_firmware.sh”代码

#!/bin/sh -e

FIRMWARE_DIRS="/lib/firmware/updates/$(uname -r) /lib/firmware/updates \
               /lib/firmware/$(uname -r) /lib/firmware"

err() {
        echo "$@" >&2
        logger -t "${0##*/}[$$]" "$@" 2>/dev/null || true
}

if [ ! -e /sys$DEVPATH/loading ]; then
        err "udev firmware loader misses sysfs directory"
        exit 1
fi

for DIR in $FIRMWARE_DIRS; do
        [ -e "$DIR/$FIRMWARE" ] || continue
        echo 1 > /sys$DEVPATH/loading
        cat "$DIR/$FIRMWARE" > /sys$DEVPATH/data
        echo 0 > /sys$DEVPATH/loading
        exit 0
done

echo -1 > /sys$DEVPATH/loading
err "Cannot find  firmware file '$FIRMWARE'"
mkdir -p /dev/.udev/firmware-missing
file=$(echo "$FIRMWARE" | sed 's:/:\\x2f:g')
ln -s -f "$DEVPATH" /dev/.udev/firmware-missing/$file
exit 1

对不起，我的英语不好

G+GustavoReyes71见我）

(二)

2）我使用从Compat driver编译的驱动程序，firmare的加载成功：

子系统==“compat_固件”，操作==“添加”，运行+=“compat_固件.sh”

#!/bin/sh -e

FIRMWARE_DIRS="/lib/firmware/updates/$(uname -r) /lib/firmware/updates \
               /lib/firmware/$(uname -r) /lib/firmware"

err() {
        echo "$@" >&2
        logger -t "${0##*/}[$$]" "$@" 2>/dev/null || true
}

if [ ! -e /sys$DEVPATH/loading ]; then
        err "udev firmware loader misses sysfs directory"
        exit 1
fi

for DIR in $FIRMWARE_DIRS; do
        [ -e "$DIR/$FIRMWARE" ] || continue
        echo 1 > /sys$DEVPATH/loading
        cat "$DIR/$FIRMWARE" > /sys$DEVPATH/data
        echo 0 > /sys$DEVPATH/loading
        exit 0
done

echo -1 > /sys$DEVPATH/loading
err "Cannot find  firmware file '$FIRMWARE'"
mkdir -p /dev/.udev/firmware-missing
file=$(echo "$FIRMWARE" | sed 's:/:\\x2f:g')
ln -s -f "$DEVPATH" /dev/.udev/firmware-missing/$file
exit 1

“compat_firmware.sh”代码

#!/bin/sh -e

FIRMWARE_DIRS="/lib/firmware/updates/$(uname -r) /lib/firmware/updates \
               /lib/firmware/$(uname -r) /lib/firmware"

err() {
        echo "$@" >&2
        logger -t "${0##*/}[$$]" "$@" 2>/dev/null || true
}

if [ ! -e /sys$DEVPATH/loading ]; then
        err "udev firmware loader misses sysfs directory"
        exit 1
fi

for DIR in $FIRMWARE_DIRS; do
        [ -e "$DIR/$FIRMWARE" ] || continue
        echo 1 > /sys$DEVPATH/loading
        cat "$DIR/$FIRMWARE" > /sys$DEVPATH/data
        echo 0 > /sys$DEVPATH/loading
        exit 0
done

echo -1 > /sys$DEVPATH/loading
err "Cannot find  firmware file '$FIRMWARE'"
mkdir -p /dev/.udev/firmware-missing
file=$(echo "$FIRMWARE" | sed 's:/:\\x2f:g')
ln -s -f "$DEVPATH" /dev/.udev/firmware-missing/$file
exit 1

对不起，我的英语不好

G+GustavoReyes71见我）

(二)

2）我使用从Compat driver编译的驱动程序，firmare的加载成功：

子系统==“compat_固件”，操作==“添加”，运行+=“compat_固件.sh”

#!/bin/sh -e

FIRMWARE_DIRS="/lib/firmware/updates/$(uname -r) /lib/firmware/updates \
               /lib/firmware/$(uname -r) /lib/firmware"

err() {
        echo "$@" >&2
        logger -t "${0##*/}[$$]" "$@" 2>/dev/null || true
}

if [ ! -e /sys$DEVPATH/loading ]; then
        err "udev firmware loader misses sysfs directory"
        exit 1
fi

for DIR in $FIRMWARE_DIRS; do
        [ -e "$DIR/$FIRMWARE" ] || continue
        echo 1 > /sys$DEVPATH/loading
        cat "$DIR/$FIRMWARE" > /sys$DEVPATH/data
        echo 0 > /sys$DEVPATH/loading
        exit 0
done

echo -1 > /sys$DEVPATH/loading
err "Cannot find  firmware file '$FIRMWARE'"
mkdir -p /dev/.udev/firmware-missing
file=$(echo "$FIRMWARE" | sed 's:/:\\x2f:g')
ln -s -f "$DEVPATH" /dev/.udev/firmware-missing/$file
exit 1

“compat_firmware.sh”代码

#!/bin/sh -e

FIRMWARE_DIRS="/lib/firmware/updates/$(uname -r) /lib/firmware/updates \
               /lib/firmware/$(uname -r) /lib/firmware"

err() {
        echo "$@" >&2
        logger -t "${0##*/}[$$]" "$@" 2>/dev/null || true
}

if [ ! -e /sys$DEVPATH/loading ]; then
        err "udev firmware loader misses sysfs directory"
        exit 1
fi

for DIR in $FIRMWARE_DIRS; do
        [ -e "$DIR/$FIRMWARE" ] || continue
        echo 1 > /sys$DEVPATH/loading
        cat "$DIR/$FIRMWARE" > /sys$DEVPATH/data
        echo 0 > /sys$DEVPATH/loading
        exit 0
done

echo -1 > /sys$DEVPATH/loading
err "Cannot find  firmware file '$FIRMWARE'"
mkdir -p /dev/.udev/firmware-missing
file=$(echo "$FIRMWARE" | sed 's:/:\\x2f:g')
ln -s -f "$DEVPATH" /dev/.udev/firmware-missing/$file
exit 1

对不起，我的英语不好

G+GustavoReyes71中的“见我”

如果您确实有USB连接的外设，为什么不想匹配USB视频/PID？另外，这似乎应该在unix/linux站点上，而不是在这里。当我从供应商或产品ID触发时，

rt2800usb

模块没有加载。当我从设备路径触发时，模块确实被加载。我正在寻找一个特定于Ralink卡并确保模块已加载的规则。这将是VID/PID规则，您需要调试它为什么不起作用。可能设备在初始连接后不久就改变了身份？从什么时候开始加载驱动程序是udev的工作？如果确实有USB连接的外设，为什么不想匹配USB VID/PID？另外，这似乎应该在unix/linux站点上，而不是在这里。当我从供应商或产品ID触发时，

rt2800usb

rt2800usb

rt2800usb

模块没有加载。当我从设备路径触发时，模块确实被加载。我正在寻找一个特定于Ralink卡并确保模块已加载的规则。这将是VID/PID规则，您需要调试它为什么不起作用。可能设备在初始连接后不久就改变了身份？从什么时候开始加载驱动程序是udev的工作？