linux

History

Rafał Miłecki 34b6d42999 bcma: add another PCI ID of device with BCM43228 It was found attached to the BCM47081A0 SoC. Log: bcma: bus0: Found chip with id 43228, rev 0x00 and package 0x08 Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>		2014-10-23 14:02:06 -04:00
..
bcma_private.h	bcma: register bcma as device tree driver	2014-09-30 13:17:14 -04:00
core.c
driver_chipcommon_b.c
driver_chipcommon_nflash.c
driver_chipcommon_pmu.c
driver_chipcommon_sflash.c
driver_chipcommon.c
driver_gmac_cmn.c
driver_gpio.c	This is the bulk of GPIO changes for the v3.18 development	2014-10-09 14:58:15 -04:00
driver_mips.c
driver_pci_host.c
driver_pci.c
driver_pcie2.c
host_pci.c	bcma: add another PCI ID of device with BCM43228	2014-10-23 14:02:06 -04:00
host_soc.c	bcma: register bcma as device tree driver	2014-09-30 13:17:14 -04:00
Kconfig
main.c	bcma: fix build when CONFIG_OF_ADDRESS is not set	2014-10-23 14:02:05 -04:00
Makefile
README
scan.c	bcma: print chip ID in a more user-friendly form	2014-09-26 17:06:50 -04:00
scan.h
sprom.c
TODO

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.