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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: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
33 lines
597 B
Text
33 lines
597 B
Text
config BCMA_POSSIBLE
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bool
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depends on HAS_IOMEM && HAS_DMA
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default y
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menu "Broadcom specific AMBA"
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depends on BCMA_POSSIBLE
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config BCMA
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tristate "BCMA support"
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depends on BCMA_POSSIBLE
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help
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Bus driver for Broadcom specific Advanced Microcontroller Bus
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Architecture.
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config BCMA_HOST_PCI_POSSIBLE
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bool
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depends on BCMA && PCI = y
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default y
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config BCMA_HOST_PCI
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bool "Support for BCMA on PCI-host bus"
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depends on BCMA_HOST_PCI_POSSIBLE
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config BCMA_DEBUG
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bool "BCMA debugging"
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depends on BCMA
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help
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This turns on additional debugging messages.
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If unsure, say N
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endmenu
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