Macbook Pro - no wireless interface

Question

I have a unibody macbook pro, trying to get the wireless to work but the wiki seems to have brought me to a dead end.
According to this:
$ lspci -vnn | grep 14e4
02:00.0 Ethernet controller [0200]: Broadcom Corporation NetXtreme BCM5764M Gigabit Ethernet PCIe [14e4:1684] (rev 10)
Subsystem: Broadcom Corporation NetXtreme BCM5764M Gigabit Ethernet PCIe [14e4:1684]
03:00.0 Network controller [0280]: Broadcom Corporation BCM43224 802.11a/b/g/n [14e4:4353] (rev 01)
I have a BCM43224, which uses the brcmsmac driver. According to the wiki, this driver is included in the kernel and requires no setup at all.
But the wireless interface doesn't come up when I do this:
$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
link/ether 58:b0:35:fd:07:94 brd ff:ff:ff:ff:ff:ff
I'm not sure what more I should post, but here's the output from hwdetect:
$ hwdetect --show-net
NET : libphy tg3 bluetooth mac80211 rfkill cfg80211
I don't know what any of those mean, other than bluetooth
Surely I must be missing something simple if this driver is supposed to "just work", right?

Answer 1

ankillito wrote:
And here's the relevant wiki troubleshooting guide that suggests the blacklisting mentioned in the previous post. I mention this because the wiki also says:
Now, rebuild the initramfs image and everything should work as expected.
# mkinitcpio -p linux
So, I did this and it doesn't seem to have worked. The link that karol pointed to says this:
To see if you were successful, execute
grep bcma /proc/modules
If there is no output, then blacklisting was successful.
But there was output:
$ grep bcma /proc/modules
bcma 11198 0 - Live 0xfb5f5000
So apparently the blacklisting was unsuccessful.