OpenCloudOS-Kernel

History

Paul Gortmaker 58f743ee06 bcma: fix build error on MIPS; implicit pcibios_enable_device The following is seen during allmodconfig builds for MIPS: drivers/bcma/driver_pci_host.c:518:2: error: implicit declaration of function 'pcibios_enable_device' [-Werror=implicit-function-declaration] cc1: some warnings being treated as errors make[3]: *** [drivers/bcma/driver_pci_host.o] Error 1 Most likey introduced by commit `49dc957715` "bcma: add PCIe host controller" Add the header instead of implicitly assuming it will be present. Sounds like a good idea, but that alone doesn't fix anything. The real problem is that the Kconfig has settings related to whether PCI is possible, i.e. config BCMA_HOST_PCI_POSSIBLE bool depends on BCMA && PCI = y default y config BCMA_HOST_PCI bool "Support for BCMA on PCI-host bus" depends on BCMA_HOST_PCI_POSSIBLE ...but what is missing is that BCMA_DRIVER_PCI_HOSTMODE doesn't have any dependencies on the above. Add one. CC: Hauke Mehrtens <hauke@hauke-m.de> CC: John W. Linville <linville@tuxdriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Acked-by: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>		2012-04-10 14:13:30 -04:00
..
Kconfig	bcma: fix build error on MIPS; implicit pcibios_enable_device	2012-04-10 14:13:30 -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: add PCIe host controller	2012-02-06 14:53:04 -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: silence PMU warning for BCM4331	2012-03-07 13:56:37 -05:00
driver_mips.c	bcma: get CPU clock	2011-08-08 14:29:29 -04:00
driver_pci.c	bcma: add PCIe host controller	2012-02-06 14:53:04 -05:00
driver_pci_host.c	bcma: fix build error on MIPS; implicit pcibios_enable_device	2012-04-10 14:13:30 -04:00
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: export bcma_find_core	2012-03-05 15:20:50 -05:00
scan.c	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless	2012-02-15 16:24:37 -05:00
scan.h	bcma: add Broadcom specific AMBA bus driver	2011-05-10 15:54:54 -04:00
sprom.c	bcma: add support for on-chip OTP memory used for SPROM storage	2012-03-06 15:16:18 -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.