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Rafał Miłecki 27f18dc2da bcma: read SPROM and extract MAC from it 
In case of BCMA cards SPROM is located in the ChipCommon core, it is
not mapped as separated host window. So far we have met only SPROMs rev
8.
SPROM layout seems to be the same as for SSB buses, so we decided to
share SPROM struct and some defines.
For now we extract MAC address only, this can be improved of course.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
 		2011-06-03 15:01:07 -04:00
..
Kconfig bcma: host pci: implement block R/W operations 2011-06-01 15:12:28 -04:00
Makefile bcma: read SPROM and extract MAC from it 2011-06-03 15:01:07 -04:00
README bcma: add Broadcom specific AMBA bus driver 2011-05-10 15:54:54 -04:00
TODO bcma: add Broadcom specific AMBA bus driver 2011-05-10 15:54:54 -04:00
bcma_private.h bcma: read SPROM and extract MAC from it 2011-06-03 15:01:07 -04:00
core.c bcma: add Broadcom specific AMBA bus driver 2011-05-10 15:54:54 -04:00
driver_chipcommon.c bcma: add missing GPIO defines, use PULL register only when available 2011-05-11 14:50:41 -04:00
driver_chipcommon_pmu.c bcma: add Broadcom specific AMBA bus driver 2011-05-10 15:54:54 -04:00
driver_pci.c bcma: pci: implement interrupts control 2011-06-01 15:11:01 -04:00
host_pci.c bcma: host pci: implement block R/W operations 2011-06-01 15:12:28 -04:00
main.c bcma: read SPROM and extract MAC from it 2011-06-03 15:01:07 -04:00
scan.c bcma: add Broadcom specific AMBA bus driver 2011-05-10 15:54:54 -04:00
scan.h bcma: add Broadcom specific AMBA bus driver 2011-05-10 15:54:54 -04:00
sprom.c bcma: read SPROM and extract MAC from it 2011-06-03 15:01:07 -04:00

README 

Broadcom introduced new bus as replacement for older SSB. It is based on AMBA,
however from programming point of view there is nothing AMBA specific we use.

Standard AMBA drivers are platform specific, have hardcoded addresses and use
AMBA standard fields like CID and PID.

In case of Broadcom's cards every device consists of:
1) Broadcom specific AMBA device. It is put on AMBA bus, but can not be treated
   as standard AMBA device. Reading it's CID or PID can cause machine lockup.
2) AMBA standard devices called ports or wrappers. They have CIDs (AMBA_CID)
   and PIDs (0x103BB369), but we do not use that info for anything. One of that
   devices is used for managing Broadcom specific core.

Addresses of AMBA devices are not hardcoded in driver and have to be read from
EPROM.

In this situation we decided to introduce separated bus. It can contain up to
16 devices identified by Broadcom specific fields: manufacturer, id, revision
and class.