Commit 8369ae33 authored by Rafał Miłecki's avatar Rafał Miłecki Committed by John W. Linville
Browse files

bcma: add Broadcom specific AMBA bus driver 



Broadcom has released cards based on a new AMBA-based bus type. From a
programming point of view, this new bus type differs from AMBA and does
not use AMBA common registers. It also differs enough from SSB. We
decided that a new bus driver is needed to keep the code clean.

In its current form, the driver detects devices present on the bus and
registers them in the system. It allows registering BCMA drivers for
specified bus devices and provides them basic operations. The bus driver
itself includes two important bus managing drivers: ChipCommon core
driver and PCI(c) core driver. They are early used to allow correct
initialization.

Currently code is limited to supporting buses on PCI(e) devices, however
the driver is designed to be used also on other hosts. The host
abstraction layer is implemented and already used for PCI(e).

Support for PCI(e) hosts is working and seems to be stable (access to
80211 core was tested successfully on a few devices). We can still
optimize it by using some fixed windows, but this can be done later
without affecting any external code. Windows are just ranges in MMIO
used for accessing cores on the bus.

Cc: Greg KH <greg@kroah.com>
Cc: Michael Büsch <mb@bu3sch.de>
Cc: Larry Finger <Larry.Finger@lwfinger.net>
Cc: George Kashperko <george@znau.edu.ua>
Cc: Arend van Spriel <arend@broadcom.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Andy Botting <andy@andybotting.com>
Cc: linuxdriverproject <devel@linuxdriverproject.org>
Cc: linux-kernel@vger.kernel.org <linux-kernel@vger.kernel.org>
Signed-off-by: default avatarRafał Miłecki <zajec5@gmail.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 306fe938

Documentation/ABI/testing/sysfs-bus-bcma

0 → 100644
+31 −0
Original line number Diff line number Diff line 
What:		/sys/bus/bcma/devices/.../manuf

Date:		May 2011

KernelVersion:	2.6.40

Contact:	Rafał Miłecki <zajec5@gmail.com>

Description:

		Each BCMA core has it's manufacturer id. See

		include/linux/bcma/bcma.h for possible values.



What:		/sys/bus/bcma/devices/.../id

Date:		May 2011

KernelVersion:	2.6.40

Contact:	Rafał Miłecki <zajec5@gmail.com>

Description:

		There are a few types of BCMA cores, they can be identified by

		id field.



What:		/sys/bus/bcma/devices/.../rev

Date:		May 2011

KernelVersion:	2.6.40

Contact:	Rafał Miłecki <zajec5@gmail.com>

Description:

		BCMA cores of the same type can still slightly differ depending

		on their revision. Use it for detailed programming.



What:		/sys/bus/bcma/devices/.../class

Date:		May 2011

KernelVersion:	2.6.40

Contact:	Rafał Miłecki <zajec5@gmail.com>

Description:

		Each BCMA core is identified by few fields, including class it

		belongs to. See include/linux/bcma/bcma.h for possible values.

MAINTAINERS

+7 −0
Original line number Diff line number Diff line
@@ -5810,6 +5810,13 @@ S: Maintained 
F:	drivers/ssb/

F:	include/linux/ssb/



BROADCOM SPECIFIC AMBA DRIVER (BCMA)

M:	Rafał Miłecki <zajec5@gmail.com>

L:	linux-wireless@vger.kernel.org

S:	Maintained

F:	drivers/bcma/

F:	include/linux/bcma/



SONY VAIO CONTROL DEVICE DRIVER

M:	Mattia Dongili <malattia@linux.it>

L:	platform-driver-x86@vger.kernel.org

drivers/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -68,6 +68,8 @@ source "drivers/watchdog/Kconfig" 


source "drivers/ssb/Kconfig"



source "drivers/bcma/Kconfig"



source "drivers/mfd/Kconfig"



source "drivers/regulator/Kconfig"

drivers/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -110,6 +110,7 @@ obj-$(CONFIG_HID) += hid/ 
obj-$(CONFIG_PPC_PS3)		+= ps3/

obj-$(CONFIG_OF)		+= of/

obj-$(CONFIG_SSB)		+= ssb/

obj-$(CONFIG_BCMA)		+= bcma/

obj-$(CONFIG_VHOST_NET)		+= vhost/

obj-$(CONFIG_VLYNQ)		+= vlynq/

obj-$(CONFIG_STAGING)		+= staging/

drivers/bcma/Kconfig

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config BCMA_POSSIBLE

	bool

	depends on HAS_IOMEM && HAS_DMA

	default y



menu "Broadcom specific AMBA"

	depends on BCMA_POSSIBLE



config BCMA

	tristate "BCMA support"

	depends on BCMA_POSSIBLE

	help

	  Bus driver for Broadcom specific Advanced Microcontroller Bus

	  Architecture.



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



config BCMA_DEBUG

	bool "BCMA debugging"

	depends on BCMA

	help

	  This turns on additional debugging messages.



	  If unsure, say N



endmenu

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