linux/drivers/bcma
Hauke Mehrtens fd4edf1975 bcma: fix handling of big addrl
The return value of bcma_erom_get_addr_desc() is a unsigned value and it
could wrap around in the two complement writing. This happens for one
core in the BCM4708 SoC.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2013-07-22 16:54:40 -04:00
..
Kconfig bcma: make it possible to select SoC support without mips 2013-07-22 16:54:39 -04:00
Makefile bcma: add GPIO driver 2012-11-21 21:55:52 +01:00
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 support for BCM43142 2013-06-27 13:42:16 -04:00
core.c bcma: update core (en|dis)abling functions 2013-06-17 14:38:53 -04:00
driver_chipcommon.c bcma: add support for BCM43142 2013-06-27 13:42:16 -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 BCM43142 2013-06-27 13:42:16 -04:00
driver_chipcommon_sflash.c bcma: use const for serial flash hardware table 2013-06-17 14:38:53 -04:00
driver_gmac_cmn.c Drivers: bcma: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
driver_gpio.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_mips.c bcma_mips: add a const qualifier 2013-04-05 13:04:07 +01:00
driver_pci.c Drivers: bcma: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
driver_pci_host.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem 2013-03-01 13:52:03 -05:00
host_pci.c bcma: add support for BCM43142 2013-06-27 13:42:16 -04:00
host_soc.c bcma: make some functions static 2012-08-10 15:26:52 -04:00
main.c bcma: return correct error code when bus scan failed 2013-07-22 16:54:40 -04:00
scan.c bcma: fix handling of big addrl 2013-07-22 16:54:40 -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 BCM43142 2013-06-27 13:42:16 -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.