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Re: [PATCH][WAS:bcmai,axi] bcma: add Broadcom specific AMBA bus driver

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On 05/07/2011 06:51 PM, RafaÅ MiÅecki wrote:
> 2011/5/7 Hauke Mehrtens <hauke@xxxxxxxxxx>:
>> On 05/07/2011 06:23 PM, RafaÅ MiÅecki wrote:
>>> 2011/5/7 Hauke Mehrtens <hauke@xxxxxxxxxx>:
>>>> On 05/05/2011 11:59 PM, RafaÅ MiÅecki wrote:
>>>>> Cc: Greg KH <greg@xxxxxxxxx>
>>>>> Cc: Michael BÃsch <mb@xxxxxxxxx>
>>>>> Cc: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
>>>>> Cc: George Kashperko <george@xxxxxxxxxxx>
>>>>> Cc: Arend van Spriel <arend@xxxxxxxxxxxx>
>>>>> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
>>>>> Cc: Russell King <rmk@xxxxxxxxxxxxxxxx>
>>>>> Cc: Arnd Bergmann <arnd@xxxxxxxx>
>>>>> Cc: Andy Botting <andy@xxxxxxxxxxxxxxx>
>>>>> Cc: linuxdriverproject <devel@xxxxxxxxxxxxxxxxxxxxxx>
>>>>> Cc: linux-kernel@xxxxxxxxxxxxxxx <linux-kernel@xxxxxxxxxxxxxxx>
>>>>> Signed-off-by: RafaÅ MiÅecki <zajec5@xxxxxxxxx>
>>>>> ---
>>>>> V2: Rename to axi
>>>>>     Use DEFINE_PCI_DEVICE_TABLE in bridge
>>>>>     Make use of pr_fmt and pr_*
>>>>>     Store core class
>>>>>     Rename bridge to not b43 specific
>>>>>     Replace magic 0x1000 with BCMAI_CORE_SIZE
>>>>>     Remove some old "ssb" names and defines
>>>>>     Move BCMAI_ADDR_BASE def
>>>>>     Add drvdata field
>>>>> V3: Fix reloading (kfree issue)
>>>>>     Add 14e4:0x4331
>>>>>     Fix non-initialized struct issue
>>>>>     Drop useless inline functions wrappers for pci core drv
>>>>>     Proper pr_* usage
>>>>> V3.1: Include forgotten changes (pr_* and include related)
>>>>>     Explain why we dare to implement empty release function
>>>>> V4: Add ABI documentation
>>>>>     Move struct device to wrapper and alloc it dynamically
>>>>>     checkpatch.pl pointed fixes
>>>>> V5: Rename to bcma, AXI was really bad name
>>>>>     Use EXPORT_SYMBOL_GPL
>>>>>     Set pci driver fields in one place
>>>>>     Drop unlikely
>>>>>     Use BCMA_CORE_SIZE for calc in awrite32
>>>>>     Add README
>>>>>     Fix compilation (delay.h)
>>>>> ---
>>>>>  Documentation/ABI/testing/sysfs-bus-bcma    |   31 ++
>>>>>  drivers/Kconfig                             |    2 +
>>>>>  drivers/Makefile                            |    1 +
>>>>>  drivers/bcma/Kconfig                        |   33 +++
>>>>>  drivers/bcma/Makefile                       |    7 +
>>>>>  drivers/bcma/README                         |   18 ++
>>>>>  drivers/bcma/TODO                           |    3 +
>>>>>  drivers/bcma/bcma_private.h                 |   31 ++
>>>>>  drivers/bcma/core.c                         |   51 ++++
>>>>>  drivers/bcma/driver_chipcommon.c            |   87 ++++++
>>>>>  drivers/bcma/driver_chipcommon_pmu.c        |  134 +++++++++
>>>>>  drivers/bcma/driver_pci.c                   |  163 +++++++++++
>>>>>  drivers/bcma/host_pci.c                     |  196 +++++++++++++
>>>>>  drivers/bcma/main.c                         |  271 ++++++++++++++++++
>>>>>  drivers/bcma/scan.c                         |  392 +++++++++++++++++++++++++++
>>>>>  drivers/bcma/scan.h                         |   56 ++++
>>>>>  include/linux/bcma/bcma.h                   |  232 ++++++++++++++++
>>>>>  include/linux/bcma/bcma_driver_chipcommon.h |  297 ++++++++++++++++++++
>>>>>  include/linux/bcma/bcma_driver_pci.h        |   89 ++++++
>>>>>  include/linux/bcma/bcma_regs.h              |   34 +++
>>>>>  include/linux/mod_devicetable.h             |   17 ++
>>>>>  scripts/mod/file2alias.c                    |   22 ++
>>>>>  22 files changed, 2167 insertions(+), 0 deletions(-)
>>>>>  create mode 100644 Documentation/ABI/testing/sysfs-bus-bcma
>>>>>  create mode 100644 drivers/bcma/Kconfig
>>>>>  create mode 100644 drivers/bcma/Makefile
>>>>>  create mode 100644 drivers/bcma/README
>>>>>  create mode 100644 drivers/bcma/TODO
>>>>>  create mode 100644 drivers/bcma/bcma_private.h
>>>>>  create mode 100644 drivers/bcma/core.c
>>>>>  create mode 100644 drivers/bcma/driver_chipcommon.c
>>>>>  create mode 100644 drivers/bcma/driver_chipcommon_pmu.c
>>>>>  create mode 100644 drivers/bcma/driver_pci.c
>>>>>  create mode 100644 drivers/bcma/host_pci.c
>>>>>  create mode 100644 drivers/bcma/main.c
>>>>>  create mode 100644 drivers/bcma/scan.c
>>>>>  create mode 100644 drivers/bcma/scan.h
>>>>>  create mode 100644 include/linux/bcma/bcma.h
>>>>>  create mode 100644 include/linux/bcma/bcma_driver_chipcommon.h
>>>>>  create mode 100644 include/linux/bcma/bcma_driver_pci.h
>>>>>  create mode 100644 include/linux/bcma/bcma_regs.h
>>>>>
>>>> Hi,
>>>>
>>>> An entry in the MAINTAINERS file would be nice to find the right
>>>> addresses to send patches to.
>>>
>>> Will do, thanks. Should I put some ML for this driver?
>>> netdev@xxxxxxxxxxxxxxx? linux-wireless@xxxxxxxxxxxxxxx? So far there
>>> are no net drivers for BCMA. Probably b43 will be the first (or
>>> brcm80211).
>>>
>> There is a Ethernet core used on embedded devices with this bus and
>> George wrote a driver for the first version of this bus implementation,
>> he send to the ML. Most user will use this with some wireless devices so
>> I would add linux-wireless@xxxxxxxxxxxxxxxx Why does ssb uses netdev ML?
> 
> Thanks, I didn't know about this ethernet driver. Have to check it!
> Where was this published? Do you have a thread name?

I think he haven't send it to the mailing list, there is a link [0] in
some Ticket [1] at OpenWrt. This driver was derived from source code
Braodcom have published, but not under a GPL compatible license. It will
be nice if Braodcom would allow us to publish a driver under the terms
of the GPL for the Ethernet core based on their driver, without writing
a full spec of the driver like it was done for b43.

> I'm not sure if we want linux-wireless to be ML, if we already have
> some Ethernet driver. Some network-general ML makes more sense then.
> Maybe netdev would be better.

Some of the embedded devices also have a USB core on the BCMA bus and a
pci(e) host controller to connect other pci(e) devices. As most of the
patches for ssb came from the wireless guys and I do not thing this will
be different for bcma, I thing the wireless mailing list is the correct
place.

@George what is the status of adding support for the embedded devices?

Hauke

[0] http://www.znau.edu.ua/temp/asus-rt-n16/openwrt-bcm4716-README.txt
[1] https://dev.openwrt.org/ticket/6580#comment
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