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Rafał Miłecki eb1577b7c4 bcma: handle alternative SPROM location 
Some cards do not use additional 0x30 offset for SPROM location. We do
not know the real condition for it yet, make it BCM4331 specific for
now.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
 		2011-07-19 16:49:53 -04:00
..
Kconfig bcma: detect PCI core working in hostmode 2011-07-07 13:13:34 -04:00
Makefile bcma: detect PCI core working in hostmode 2011-07-07 13:13:34 -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: detect PCI core working in hostmode 2011-07-07 13:13:34 -04:00
core.c drivers: bcma: export bcma_core_disable() function 2011-06-10 14:57:53 -04:00
driver_chipcommon.c bcma: cc: set GPIOTIMER register 2011-07-18 14:29:04 -04:00
driver_chipcommon_pmu.c bcma: fix BCM43224 rev 0 workaround 2011-06-20 15:34:19 -04:00
driver_pci.c bcma: detect PCI core working in hostmode 2011-07-07 13:13:34 -04:00
driver_pci_host.c bcma: detect PCI core working in hostmode 2011-07-07 13:13:34 -04:00
host_pci.c bcma: enable support for 14e4:4357 (BCM43225) 2011-06-20 15:34:18 -04:00
main.c bcma: add check if sprom is available before accessing it. 2011-07-11 15:02:17 -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: handle alternative SPROM location 2011-07-19 16:49:53 -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.