John W. Linville 28ea499ac5 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem 13 years ago
..
Kconfig 23cb3b2121 bcma: add place for flash memory support 13 years ago
Makefile 23cb3b2121 bcma: add place for flash memory support 13 years ago
README 8369ae33b7 bcma: add Broadcom specific AMBA bus driver 14 years ago
TODO 8369ae33b7 bcma: add Broadcom specific AMBA bus driver 14 years ago
bcma_private.h 23cb3b2121 bcma: add place for flash memory support 13 years ago
core.c 3d9d8af330 bcma: use custom printing functions 13 years ago
driver_chipcommon.c 9a89c3a856 bcma: fix CC driver compilation on MIPS 13 years ago
driver_chipcommon_nflash.c 23cb3b2121 bcma: add place for flash memory support 13 years ago
driver_chipcommon_pmu.c 1f03bf06e4 bcma: fix invalid PMU chip control masks 13 years ago
driver_chipcommon_sflash.c 23cb3b2121 bcma: add place for flash memory support 13 years ago
driver_gmac_cmn.c e1ac4b4090 bcma: add trivial GBIT MAC COMMON driver 13 years ago
driver_mips.c d8f1bd2ffc bcma: fix regression in interrupt assignment on mips 13 years ago
driver_pci.c e7027075d0 bcma: fix null pointer in bcma_core_pci_irq_ctl 13 years ago
driver_pci_host.c 3d9d8af330 bcma: use custom printing functions 13 years ago
host_pci.c 3d9d8af330 bcma: use custom printing functions 13 years ago
host_soc.c ecd177c216 bcma: add SOC bus 14 years ago
main.c e1ac4b4090 bcma: add trivial GBIT MAC COMMON driver 13 years ago
scan.c 9dbf5f55f8 bcma: add missing iounmap on error path 13 years ago
scan.h 97cfda8fec bcma: fix typo - reading number of slave wrappers 13 years ago
sprom.c 3d9d8af330 bcma: use custom printing functions 13 years ago

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.