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OpenCloudOS-Kernel/drivers/bcma
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Hauke Mehrtens 2b4766c300 bcma: do not initialize deactivated PCIe cores 
Before it was tried to initialize the deactivated PCIe core in client
mode, but this causes the SoC to hang. Just do not initialize it at all
and ignore the core it is not working and nothing is connected to it
when the specific bit is set in the boardflags.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
 		2012-10-19 15:53:03 -04:00
..
Kconfig bcma: detect and register NAND flash device 2012-08-21 16:05:53 -04:00
Makefile bcma: add place for flash memory support 2012-07-17 15:11:40 -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: detect and register NAND flash device 2012-08-21 16:05:53 -04:00
core.c bcma: change delays to follow timers-howto guide 2012-09-28 13:54:02 -04:00
driver_chipcommon.c bcma: just do the necessary things in early register on SoCs 2012-10-19 15:52:18 -04:00
driver_chipcommon_nflash.c bcma: mark nflash if it is the boot flash 2012-10-19 15:52:37 -04:00
driver_chipcommon_pmu.c bcma: just do the necessary things in early register on SoCs 2012-10-19 15:52:18 -04:00
driver_chipcommon_sflash.c bcma: add some more flash chips for serial flash 2012-10-19 15:52:39 -04:00
driver_gmac_cmn.c bcma: add trivial GBIT MAC COMMON driver 2012-07-12 15:27:18 -04:00
driver_mips.c bcma: extract drv_cc in bcma_core_mips_flash_detect() 2012-10-19 15:52:38 -04:00
driver_pci.c bcma: change delays to follow timers-howto guide 2012-09-28 13:54:02 -04:00
driver_pci_host.c bcma: do not initialize deactivated PCIe cores 2012-10-19 15:53:03 -04:00
host_pci.c bcma: handle BCM43227 2012-09-24 15:02:07 -04:00
host_soc.c bcma: make some functions static 2012-08-10 15:26:52 -04:00
main.c bcma: add an extra pcie core struct 2012-10-19 15:52:59 -04:00
scan.c bcma: add missing iounmap on error path 2012-07-26 15:37:57 -04:00
scan.h bcma: fix typo - reading number of slave wrappers 2012-07-12 15:27:17 -04:00
sprom.c bcma: use fallback sprom if sprom on card was not valid 2012-10-19 15:52:53 -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.