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usb/uhci: Add support for Aspeed BMC SoCs
The Aspeed 2400/2500 families have a variant of UHCI which requires some quirks to the driver to work: - The register offsets are different. We add a remapping helper. - All accesses have to be done via 32-bit loads and stores. We force all accessors to use readl/writel. This is of no consequence for reads as we never read "in the middle" of a register. For writes it also works fine as the registers only actually implement the bits we try to write (16-bit for the registers accessed with writew and 8-bit for the register accessed with writeb), so always using a 32-bit write will have no negative effect. We never do partial writes. - The resume detect interrupt is broken - The number of ports is (optionally) provided via the device-tree Signed-off-by:Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by:
Alan Stern <stern@rowland.harvard.edu> -- v2. Remove the bulk of the #ifdef's drivers/usb/host/Kconfig | 6 ++++- drivers/usb/host/uhci-hcd.c | 17 +++++++++++--- drivers/usb/host/uhci-hcd.h | 51 ++++++++++++++++++++++++++++++++++++++++ drivers/usb/host/uhci-platform.c | 22 ++++++++++++++++- 4 files changed, 91 insertions(+), 5 deletions(-) Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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- drivers/usb/host/Kconfig 5 additions, 1 deletiondrivers/usb/host/Kconfig
- drivers/usb/host/uhci-hcd.c 14 additions, 3 deletionsdrivers/usb/host/uhci-hcd.c
- drivers/usb/host/uhci-hcd.h 51 additions, 0 deletionsdrivers/usb/host/uhci-hcd.h
- drivers/usb/host/uhci-platform.c 21 additions, 1 deletiondrivers/usb/host/uhci-platform.c
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