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History

Rafał Miłecki 0f8ca01461 bcma: gpio: register 32 GPIOs on BCM5357 Some Broadcom boards have more GPIOs available. For example Linksys E3200 home router is based on SoC id 0x5357, package 0x0A and uses GPIO 23 to reset internal USB WiFi (gpio23=wombo_reset). Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>		2014-03-27 14:20:04 -04:00
..
bcma_private.h	bcma: export bcma_find_core_unit()	2014-01-04 20:25:19 -05:00
core.c
driver_chipcommon_nflash.c
driver_chipcommon_pmu.c
driver_chipcommon_sflash.c	bcma: fix sparse warnings in driver_chipcommon_sflash.c	2014-01-03 15:37:01 -05:00
driver_chipcommon.c
driver_gmac_cmn.c
driver_gpio.c	bcma: gpio: register 32 GPIOs on BCM5357	2014-03-27 14:20:04 -04:00
driver_mips.c
driver_pci_host.c
driver_pci.c	bcma: make bcma_core_pci_{up,down}() callable from atomic context	2013-09-26 14:02:33 -04:00
host_pci.c	bcma: pci: remove DEFINE_PCI_DEVICE_TABLE macro	2013-12-09 15:35:27 -05:00
host_soc.c
Kconfig	bcma: gpio: add own IRQ domain	2014-01-23 13:02:37 +01:00
main.c	bcma: export bcma_find_core_unit()	2014-01-04 20:25:19 -05:00
Makefile
README
scan.c	bcma: fix error code handling on 64 Bit systems	2013-09-09 14:44:33 -04:00
scan.h
sprom.c
TODO

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.