Re: brcmsmac in kernel driver on a Samsung NC110

["Arend van Spriel" <arend@broadcom.com>]

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

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