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hw/arm/sbsa-ref: use XHCI to replace EHCI

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The current sbsa-ref cannot use EHCI controller which is only
able to do 32-bit DMA, since sbsa-ref doesn't have RAM below 4GB.
Hence, this uses XHCI to provide a usb controller with 64-bit
DMA capablity instead of EHCI.

We bump the platform version to 0.3 with this change.  Although the
hardware at the USB controller address changes, the firmware and
Linux can both cope with this -- on an older non-XHCI-aware
firmware/kernel setup the probe routine simply fails and the guest
proceeds without any USB.  (This isn't a loss of functionality,
because the old USB controller never worked in the first place.) So
we can call this a backwards-compatible change and only bump the
minor version.

Signed-off-by: Yuquan Wang <wangyuquan1236@phytium.com.cn>
Message-id: 20230621103847.447508-2-wangyuquan1236@phytium.com.cn
[PMM: tweaked commit message; add line to docs about what
 changes in platform version 0.3]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Yuquan Wang 2023-07-04 14:08:47 +01:00 • committed by Peter Maydell
parent 587f8b333c
commit 62c2b8760b
3 changed files with 18 additions and 12 deletions
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5
docs/system/arm/sbsa.rst
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@ -19,7 +19,7 @@ The ``sbsa-ref`` board supports:
- A configurable number of AArch64 CPUs
- GIC version 3
- System bus AHCI controller
- System bus EHCI controller
- System bus XHCI controller
- CDROM and hard disc on AHCI bus
- E1000E ethernet card on PCIe bus
- Bochs display adapter on PCIe bus
@ -68,3 +68,6 @@ Platform version changes:
0.2
GIC ITS information is present in devicetree.
0.3
The USB controller is an XHCI device, not EHCI