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Rafał Miłecki 58b27101e1 bcma: Xflash: reorder includes to make pr_fmt work 
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
 		2013-02-01 14:27:21 -05:00
..
Kconfig bcma: BCMA_DRIVER_GPIO should depend on GPIOLIB instead of selecting it 2013-01-02 14:38:22 -05:00
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: register platform device for parallel flash 2013-01-30 15:06:46 -05:00
core.c bcma: change delays to follow timers-howto guide 2012-09-28 13:54:02 -04:00
driver_chipcommon.c bcma: return the mips irq number in bcma_core_irq 2013-01-11 14:49:59 -05:00
driver_chipcommon_nflash.c bcma: Xflash: reorder includes to make pr_fmt work 2013-02-01 14:27:21 -05:00
driver_chipcommon_pmu.c MTD pull for 3.8 2012-12-19 12:47:41 -08:00
driver_chipcommon_sflash.c bcma: Xflash: reorder includes to make pr_fmt work 2013-02-01 14:27:21 -05:00
driver_gmac_cmn.c bcma: add trivial GBIT MAC COMMON driver 2012-07-12 15:27:18 -04:00
driver_gpio.c bcma: add gpio_to_irq 2013-01-30 15:07:06 -05:00
driver_mips.c bcma: register platform device for parallel flash 2013-01-30 15:06:46 -05:00
driver_pci.c bcma: change delays to follow timers-howto guide 2012-09-28 13:54:02 -04:00
driver_pci_host.c bcma: use consistent case for 'hex' constants 2013-01-14 15:10:41 -05:00
host_pci.c bcma: suspend/resume callbacks should be conditionally compiled on CONFIG_PM_SLEEP 2012-10-29 15:19:31 -04:00
host_soc.c bcma: make some functions static 2012-08-10 15:26:52 -04:00
main.c bcma: register platform device for parallel flash 2013-01-30 15:06:46 -05:00
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.