linux

History

Hauke Mehrtens d1a7a8e1d3 bcma: make some functions __devinit bcma_core_pci_hostmode_init() has to be in __devinit as it will call a function in that section and so all functions calling it also have to be in __devinit. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>		2012-02-06 14:53:03 -05:00
..
Kconfig	bcma: add mips driver	2011-08-08 14:29:26 -04:00
Makefile	bcma: add mips driver	2011-08-08 14:29:26 -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: make some functions __devinit	2012-02-06 14:53:03 -05:00
core.c	bcma: fix implicit use of export.h contents	2011-10-31 19:32:02 -04:00
driver_chipcommon.c	bcma: fix implicit use of export.h contents	2011-10-31 19:32:02 -04:00
driver_chipcommon_pmu.c	bcma: fix implicit use of export.h contents	2011-10-31 19:32:02 -04:00
driver_mips.c	bcma: get CPU clock	2011-08-08 14:29:29 -04:00
driver_pci.c	bcma: make some functions __devinit	2012-02-06 14:53:03 -05:00
driver_pci_host.c	bcma: make some functions __devinit	2012-02-06 14:53:03 -05:00
host_pci.c	bcma: make some functions __devinit	2012-02-06 14:53:03 -05:00
host_soc.c	bcma: add SOC bus	2011-08-08 14:29:25 -04:00
main.c	bcma: make some functions __devinit	2012-02-06 14:53:03 -05:00
scan.c	bcma: add the core unit number	2012-02-06 14:50:39 -05:00
scan.h	bcma: add Broadcom specific AMBA bus driver	2011-05-10 15:54:54 -04:00
sprom.c	bcma: Enable logging of SPROM offset	2012-01-24 14:21:12 -05:00

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.