Re: brcmsmac in kernel driver on a Samsung NC110

[John Talbut <jt@dpets.co.uk>]

On 27/03/13 12:06, Arend van Spriel wrote:
> On 03/27/2013 12:22 PM, Arend van Spriel wrote:
>> On 03/27/2013 11:45 AM, John Talbut wrote:
>>>
>>>
>>> On 27/03/13 10:33, Rafał Miłecki wrote:
>>>> 2013/3/27 John Talbut <jt@dpets.co.uk>:
>>>>> On 27/03/13 07:46, Rafał Miłecki wrote:
>>>>>> 2013/3/26 Arend van Spriel <arend@broadcom.com>:
>>>>>>> On 03/26/2013 08:48 PM, John Talbut wrote:
>>>>>>>> echo "14e4 4357" > /sys/bus/pci/drivers/bcma-pci-bridge/new_id
>>>>>>>> bash: /sys/bus/pci/drivers/bcma-pci-bridge/new_id: No such file or directory
>>>>>>>
>>>>>>> This could mean you do not have CONFIG_BCMA_HOST_PCI=y in your .config
>>>>>>
>>>>>> Exactly. Make sure you have CONFIG_BCMA_HOST_PCI=y and that your
>>>>>> host_pci.c is not modified/hacked/whatever.
>>>>>>
>>>>>> You can compare it with
>>>>>> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/bcma/host_pci.c
>>>>>> bcma_pci_bridge_tbl.
>>>>>>
>>>>> OK, thanks, I have recompiled the kernel with CONFIG_BCMA_HOST_PCI=y and
>>>>> we have some progress.
>>>>>
>>>>> ls /sys/bus/bcma/devices
>>>>> bcma0:0
>>>>>
>>>>> lspci -d 14e4: -v
>>>>> now has a line:
>>>>> Kernel driver in use: bcma-pci-bridge
>>>>>
>>>>> host_pci.c is the same as torvalds.
>>>>>
>>>>> However, kernel log includes:
>>>>> brcmsmac bcma0:0: firmware: agent aborted loading brcm/bcm43xx-0.fw (not
>>>>> found?)
>>>>> ieee80211 phy0: brcmsmac: Failed to find firmware usually in
>>>>> /lib/firmware/brcm
>>>>> brcmsmac: brcms_bcma_probe: brcms_attach failed!
>>>>
>>>> "Failed to find firmware". You didn't tell us if you have firmware installed.
>>>> ls /lib/firmware/brcm/
>>>> http://wireless.kernel.org/en/users/Drivers/brcm80211#Firmware_installation
>>>>
>>> Sorry, meant to do that:
>>> ls /lib/firmware/brcm/
>>> bcm43xx-0.fw bcm43xx_hdr-0.fw
>>>
> 
> To confirm my suspicion could you try following (as root):
> 
> /sys/bus/bcma/drivers/brcmsmac # echo bcma0:0 > bind
> 
> This should retrigger brcmsmac to get firmware and use the device.
> 
> Regards,
> Arend

Yes.
cd /sys/bus/bcma/drivers/brcmsmac
echo bcma0:0 > bind

And I now have wlan0.

So, how to get the firmware loaded after the root filesystem is mounted?

Regards
John
> 
>>
>> Do you have a ramdisk during boot? I suspect brcmsmac does request the
>> firmware before the root filesystem is mounted.
>>
>> Gr. AvS
>>
> 
> 
>