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History

Rafał Miłecki dc8ecdd3a3 bcma: move bus struct setup into early part of host specific code This change is important for SoC host. In future we will want to know chip ID (needed for early MIPS boot) before doing cores scanning. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Acked-by: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>		2014-09-09 15:27:18 -04:00
..
bcma_private.h	bcma: export bcma_find_core_unit()	2014-01-04 20:25:19 -05:00
core.c	bcma: update core (en\|dis)abling functions	2013-06-17 14:38:53 -04:00
driver_chipcommon_nflash.c	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless	2013-02-14 14:23:33 -05:00
driver_chipcommon_pmu.c	bcma: add support for BCM43131 that was found in Tenda W311E	2014-07-29 10:32:57 -04:00
driver_chipcommon_sflash.c	bcma: fix sparse warnings in driver_chipcommon_sflash.c	2014-01-03 15:37:01 -05:00
driver_chipcommon.c	bcma: add support for BCM43142	2013-06-27 13:42:16 -04:00
driver_gmac_cmn.c	Drivers: bcma: remove __dev* attributes.	2013-01-03 15:57:15 -08:00
driver_gpio.c	bcma: gpio: register all 32 GPIOs on BCM53572	2014-06-19 15:49:15 -04:00
driver_mips.c	bcma: get info about flash type SoC booted from	2014-09-04 13:50:11 -04:00
driver_pci_host.c	bcma: change max PCI read request size to 128	2013-08-26 14:09:02 -04:00
driver_pci.c	bcma: make bcma_core_pci_{up,down}() callable from atomic context	2013-09-26 14:02:33 -04:00
driver_pcie2.c	bcma: add driver for PCIe Gen 2 core	2014-07-07 16:32:16 -04:00
host_pci.c	bcma: move bus struct setup into early part of host specific code	2014-09-09 15:27:18 -04:00
host_soc.c	bcma: move bus struct setup into early part of host specific code	2014-09-09 15:27:18 -04:00
Kconfig	bcma: gpio: add own IRQ domain	2014-01-23 13:02:37 +01:00
main.c	bcma: move bus struct setup into early part of host specific code	2014-09-09 15:27:18 -04:00
Makefile	bcma: add driver for PCIe Gen 2 core	2014-07-07 16:32:16 -04:00
README	bcma: add Broadcom specific AMBA bus driver	2011-05-10 15:54:54 -04:00
scan.c	bcma: move bus struct setup into early part of host specific code	2014-09-09 15:27:18 -04:00
scan.h	bcma: fix typo - reading number of slave wrappers	2012-07-12 15:27:17 -04:00
sprom.c	bcma: add support for BCM43131 that was found in Tenda W311E	2014-07-29 10:32:57 -04:00
TODO	bcma: add Broadcom specific AMBA bus driver	2011-05-10 15:54:54 -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.