以 Broadcom Corporation BCM4311, BCM4312, BCM4313, BCM4321, BCM4322, BCM43224, BCM43225, BCM43227 和 BCM43228 为基础的无线网络卡

 CentOS 对这些芯片组并没有原生的支持。

这页的英文版本现时由 Miloš Blažević 维护。

若要安装以 Broadcom BCM4311、BCM4312、BCM4313、BCM4321、BCM4322、BCM43224、BCM43225、BCM43227 或 BCM43228 为基础的无线网络卡，请遵照以下的步骤：

第 1 步：辨认无线网络芯片及安装时依赖的组件

首先，请确定你是位「拥有 Broadcom BCM43xx 无线网络卡的幸运儿」：

[user@host ~]$ /sbin/lspci | grep Broadcom
0b:00.0 Network controller: Broadcom Corporation BCM4312 802.11a/b/g (rev 01)

辨认完无线网络芯片型号之后，请确定你不会欠缺编译及安装时所需的组件：

[root@host]# yum install kernel-headers kernel-devel gcc

当然，假若你要为 Xen 内核（kernel-xen）编译驱动程序，你必须安装 kernel-xen-devel 而不是 kernel-devel。

第 2 步：下载并解压 Broadcom 驱动程序的压缩档

请从 Broadcom 的官方网站下载 Broadcom BCM43xx 的 linux 驱动程序压缩档到你的机器并将它解压到 /usr/local/src/hybrid-wl，请随你所需将这个目录的拥有者改为无特权的用户：

[root@host ~]# mkdir -p /usr/local/src/hybrid-wl
[root@host hybrid-wl]# cd /usr/local/src/hybrid-wl
[root@host hybrid-wl]# tar xvfz /path/to/the/tarball/hybrid-v35_64-nodebug-pcoem-6_30_223_271.tar.gz
[root@host hybrid-wl]# chown -R someuser.somegroup /usr/local/src/hybrid-wl

第 3 步上：编译 Broadcom 驱动模块 （在 EL6 和 EL7 上）

驱动模块可以这样编译：

[user@host hybrid-wl]$ make -C /lib/modules/`uname -r`/build/ M=`pwd`

请留意引号（即反引号）。

编译现有的驱动程序（6.30.223.271 版）时，你差不多肯定会获得一个错误信息，而不是一个编译好的驱动模块（实际上，本作者仍未遇过这个信息以外的情况）。这则信息的内容随着内核和操作系统版本而变化，但是在 CentOS 6 上它大致上是：

make: Entering directory `/usr/src/kernels/2.6.32-573.7.1.el6.x86_64'
CFG80211 API is prefered for this kernel version
Using CFG80211 API
  LD /usr/local/src/hybrid-wl/built-in.o
  CC [M] /usr/local/src/hybrid-wl/src/shared/linux_osl.o
  CC [M] /usr/local/src/hybrid-wl/src/wl/sys/wl_linux.o
  CC [M] /usr/local/src/hybrid-wl/src/wl/sys/wl_iw.o
  CC [M] /usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.o
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:83: warning: ‘enum tx_power_setting’ declared inside parameter list
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:83: warning: its scope is only this definition or declaration, <snip>
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c: In function ‘wl_cfg80211_join_ibss’:
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:730: error: ‘struct cfg80211_ibss_params’ has no member named ‘channel’
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c: At top level:
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:1096: warning: ‘enum tx_power_setting’ declared inside parameter list
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:1096: error: parameter 2 (‘type’) has incomplete type
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c: In function ‘wl_cfg80211_set_tx_power’:
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:1107: error: ‘TX_POWER_AUTOMATIC’ undeclared (first use in this <snip>
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:1107: error: (Each undeclared identifier is reported only once
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:1107: error: for each function it appears in.)
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:1109: error: ‘TX_POWER_LIMITED’ undeclared (first use in this function)
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:1115: error: ‘TX_POWER_FIXED’ undeclared (first use in this function)
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c: At top level:
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:1774: warning: initialization from incompatible pointer type
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:1779: warning: initialization from incompatible pointer type
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:1780: warning: initialization from incompatible pointer type
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:1781: warning: initialization from incompatible pointer type
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:1782: warning: initialization from incompatible pointer type
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:1783: warning: initialization from incompatible pointer type
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:1784: warning: initialization from incompatible pointer type
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:1789: warning: initialization from incompatible pointer type
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c: In function ‘wl_inform_single_bss’:
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:1984: error: too few arguments to function <snip>
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:2023: warning: passing argument 1 of ‘cfg80211_put_bss’ from <snip>
include/net/cfg80211.h:3380: note: expected ‘struct wiphy *’ but argument is of type ‘struct cfg80211_bss *’
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:2023: error: too few arguments to function ‘cfg80211_put_bss’
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c: In function ‘wl_update_bss_info’:
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:2276: error: ‘struct cfg80211_bss’ has no member named <snip>
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:2277: error: ‘struct cfg80211_bss’ has no member named <snip>
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:2283: warning: passing argument 1 of ‘cfg80211_put_bss’ from <snip>
include/net/cfg80211.h:3380: note: expected ‘struct wiphy *’ but argument is of type ‘struct cfg80211_bss *’
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:2283: error: too few arguments to function ‘cfg80211_put_bss’
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c: In function ‘wl_bss_roaming_done’:
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:2322: warning: passing argument 2 of ‘cfg80211_roamed’ from <snip>
include/net/cfg80211.h:3726: note: expected ‘struct ieee80211_channel *’ but argument is of type ‘u8 *’
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:2322: warning: passing argument 4 of ‘cfg80211_roamed’ makes <snip>
include/net/cfg80211.h:3726: note: expected ‘const u8 *’ but argument is of type ‘s32’
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:2322: warning: passing argument 5 of ‘cfg80211_roamed’ makes <snip>
include/net/cfg80211.h:3726: note: expected ‘size_t’ but argument is of type ‘u8 *’
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:2322: warning: passing argument 6 of ‘cfg80211_roamed’ makes <snip>
include/net/cfg80211.h:3726: note: expected ‘const u8 *’ but argument is of type ‘s32’
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:2322: error: too few arguments to function ‘cfg80211_roamed’
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c: In function ‘wl_update_wowl’:
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:2791: warning: unused variable ‘wdev’
make[1]: *** [/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.o] Error 1
make: *** [_module_/usr/local/src/hybrid-wl] Error 2
make: Leaving directory `/usr/src/kernels/2.6.32-573.7.1.el6.x86_64'

驱动程序由于 wl_cfg80211_hybrid.c 档内检查内核版本的 if-then-else 句式而不能编译。我们须要执行下列两个指令来进行修正：

[user@host hybrid-wl]$ sed -i 's/[ >][>=] KERNEL_VERSION(2, 6, 3.)/>= KERNEL_VERSION(2, 6, 32)/' src/wl/sys/wl_cfg80211_hybrid.c
[user@host hybrid-wl]$ sed -i 's/[ >][>=] KERNEL_VERSION(3, ., .)/>= KERNEL_VERSION(2, 6, 32)/' src/wl/sys/wl_cfg80211_hybrid.c
[user@host hybrid-wl]$ sed -i 's/[ >][>=] KERNEL_VERSION(3, 11, .)/>= KERNEL_VERSION(2, 6, 32)/' src/wl/sys/wl_cfg80211_hybrid.c
[user@host hybrid-wl]$ sed -i 's/< KERNEL_VERSION(3, 18, .)/< KERNEL_VERSION(2, 6, 30)/' src/wl/sys/wl_cfg80211_hybrid.c
[user@host hybrid-wl]$ sed -i 's/[ >][>=] KERNEL_VERSION(3, 15, .)/>= KERNEL_VERSION(2, 6, 32)/' src/wl/sys/wl_cfg80211_hybrid.c

不过，这些 'sed' 替换命令仍未能确保驱动程序可以正常编译。我们还须要在编译驱动程序前应用 wl-kmod-fix-ioctl-handling.patch 这个修正。请将它下载至 /usr/local/src 然后执行下列指令来修正驱动程序的源代码：

[user@host hybrid-wl]$ patch -p1 < ../wl-kmod-fix-ioctl-handling.patch
patching file src/wl/sys/wl_cfg80211_hybrid.c
Hunk #1 succeeded at 1467 (offset 17 lines).
patching file src/wl/sys/wl_linux.c
Hunk #1 succeeded at 1659 (offset 8 lines).

现在，请尝试再次编译驱动模块：

[user@host hybrid-wl]$ make -C /lib/modules/`uname -r`/build/ M=`pwd`

编译器的输出大致上是这样：

make: Entering directory `/usr/src/kernels/2.6.32-573.7.1.el6.x86_64'
CFG80211 API is prefered for this kernel version
Using CFG80211 API
  LD /usr/local/src/hybrid-wl/built-in.o
  CC [M] /usr/local/src/hybrid-wl/src/shared/linux_osl.o
  CC [M] /usr/local/src/hybrid-wl/src/wl/sys/wl_linux.o
  CC [M] /usr/local/src/hybrid-wl/src/wl/sys/wl_iw.o
  CC [M] /usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.o
/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:1802: warning: initialization from incompatible pointer type
  LD [M] /usr/local/src/hybrid-wl/wl.o
  Building modules, stage 2.
CFG80211 API is prefered for this kernel version
Using CFG80211 API
  MODPOST 1 modules
  CC /usr/local/src/hybrid-wl/wl.mod.o
  LD [M] /usr/local/src/hybrid-wl/wl.ko.unsigned
  NO SIGN [M] /usr/local/src/hybrid-wl/wl.ko
make: Leaving directory `/usr/src/kernels/2.6.32-573.7.1.el6.x86_64'

一旦这个模块被建成，你便可以删除不必要的符号：

[user@host hybrid-wl]$ strip --strip-debug wl.ko

你会发现驱动模块的文件尺寸会缩小（由 8.2MB 降至 7.2MB）。而且，你的驱动模块仍能正常运作 

第 3 步下：编译 Broadcom 驱动模块 （EL7需要的部分细节）

如果你运行的是 EL7，那么不需要运行前面步骤的 'sed' 命令。不过你需要应用这个额外的修正：wl-kmod-rhel7_1.patch（连同第 3 步上 的那个修正一起）

[user@host hybrid-wl]$ patch -p1 < ../wl-kmod-rhel7_1.patch
patching file src/wl/sys/wl_cfg80211_hybrid.c
Hunk #1 succeeded at 1801 (offset -3 lines).
Hunk #2 succeeded at 1867 (offset -3 lines).
Hunk #3 succeeded at 2071 (offset -3 lines).
Hunk #4 succeeded at 2804 (offset -3 lines).

当应用了这个修正之后，接着按照第 3 步上 的剩余步骤 - 编译驱动程序和删除侦错符号。只有应用这两个修正才可以编译驱动模块，就像所说的那样起作用。

第 4 步上：将驱动模块装入内核中

当你成功地编译了驱动模块后，你便可以将它装入内核中，并最终设置开机时自动装入此驱动程序（要这样做，你必须利用 root 的权限）。当然，做这一切之先，你必须从内核删除现在的无线驱动模块（假如有的话）：

[root@host ~]# modprobe -r bcm43xx
[root@host ~]# modprobe -r b43
[root@host ~]# modprobe -r b43legacy
[root@host ~]# modprobe -r ssb
[root@host ~]# modprobe -r bcma
[root@host ~]# modprobe -r brcmsmac
[root@host ~]# modprobe -r ndiswrapper

请将驱动模块的文件复制到一个可以让内核找到它的地方：

[root@host hybrid-wl]# cp -vi /usr/local/src/hybrid-wl/wl.ko /lib/modules/`uname -r`/extra/

这样做是为了与其它已经／将会从 kmod 组件安装的外置模块（例如：fuse、ntfs-3g、等）保持一贯性。

按著，请执行：

[root@host ~]# depmod $(uname -r)

以便能创建一个模块的互赖性清单。现在我们装入驱动模块：

[root@host hybrid-wl]# insmod wl.ko

假如这一步失败了（有不少这样的报告，但是作者本身还没有遇到过这类问题），并伴有如下提示信息：

insmod: error inserting 'wl.ko': -1 Unknown symbol in module

首先尝试创建模块依赖：

[root@host ~]# depmod `uname -r`

然后装入驱动模块：

[root@host hybrid-wl]# modprobe wl

要是没有错误信息，驱动程序已被装入及随时可用。假如你只有无线驱动程序应用 ndiswrapper 内核模块，你可将它删除 —— 但这并非必须的。

第 4 步下：在开机时将驱动模块装入内核中

你仍须额外数个步骤才能在开机时自动装入模块。首先，编辑 /etc/modprobe.d/blacklist 这个文件并加入以下内容：

blacklist bcm43xx
blacklist b43
blacklist b43legacy
blacklist bcma
blacklist brcmsmac
blacklist ssb
blacklist ndiswrapper

通过这样做，你可以防止这些模块在开机时被装入内核中，与 wl 模块产生冲突。另外，若要在开机时装入 wl 模块，请创建／编辑/etc/sysconfig/modules/kmod-wl.modules 并把以下内容剪贴到其中：

#!/bin/bash

for M in lib80211 cfg80211 wl; do
    modprobe $M &>/dev/null
done

现在你的驱动应该在每次开机时都会被装入（当然除了在你安装了新内核之后，到时你必须依照以上步骤将它重新编译）。

附录一：已获（用户）测试和汇报为可用的 Broadcom 芯片型号

Translation of revision 42