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[RFC,0/8] usb/uhci: Add UHCI sysbus support, and enable for AST machines

Message ID 20240906122542.3808997-1-linux@roeck-us.net
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Series usb/uhci: Add UHCI sysbus support, and enable for AST machines | expand

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Guenter Roeck Sept. 6, 2024, 12:25 p.m. UTC 
Some machines (like Aspeed ARM) only support a sysbus UHCI controller.
The current UHCI implementation in qemu only supports PCI based UHCI
controllers.

This patch series separates basic and PCI functionality from the hcd-uhci
implementation and then adds uhci-sysbus support. This is then used
to implement and enable sysbus based UHCI support for Aspeed machines.

The series is submitted as RFC since I am quite sure that I didn't get
everything right. All code surrounding VMStates deserves special scrutiny,
as well as the changes outside hw/usb/ and hw/arm/.

A side effect of this patch series is that all Aspeed machines will now
instantiate UHCI, even if the machine does not actually support it
(it also always instantiates both EHCI ports, so that is not really
different). This means that the default USB bus is now the UHCI bus,
not the second EHCI bus. The bus number must therefore now be specified
explicitly when attaching a device unless attaching it to the UHCI port
is ok. I don't know if it is possible to avoid that and to ensure that
the default USB port is still the second EHCI port.

The code was tested on x86 machines to ensure that the existing UHCI
implementation still works. It was also tested on various Aspeed machines
with enabled UHCI ports (ast2500-evb, ast2600-evb, and rainier-bmc).

----------------------------------------------------------------
Guenter Roeck (8):
      usb/uhci: checkpatch cleanup
      usb/uhci: Introduce and use register defines
      usb/uhci: Move PCI-related code into a separate file
      usb/uhci: enlarge uhci memory space
      usb/uhci: Add support for usb-uhci-sysbus
      usb/uhci: Add aspeed specific read and write functions
      aspeed: Add uhci support for ast2600
      aspeed: Add uhci support for ast2400 and ast2500

 hw/arm/Kconfig                |   1 +
 hw/arm/aspeed_ast2400.c       |  14 ++
 hw/arm/aspeed_ast2600.c       |  13 ++
 hw/isa/Kconfig                |   4 +-
 hw/isa/vt82c686.c             |   4 +-
 hw/usb/Kconfig                |  10 +-
 hw/usb/hcd-uhci-pci.c         | 255 ++++++++++++++++++++++++++++++++
 hw/usb/hcd-uhci-pci.h         |  63 ++++++++
 hw/usb/hcd-uhci-sysbus.c      | 201 +++++++++++++++++++++++++
 hw/usb/hcd-uhci-sysbus.h      |  34 +++++
 hw/usb/hcd-uhci.c             | 337 +++++++++++++-----------------------------
 hw/usb/hcd-uhci.h             |  30 ++--
 hw/usb/meson.build            |   2 +
 hw/usb/vt82c686-uhci-pci.c    |  18 +--
 include/hw/arm/aspeed_soc.h   |   3 +
 include/hw/southbridge/piix.h |   4 +-
 include/hw/usb/uhci-regs.h    |  11 ++
 17 files changed, 737 insertions(+), 267 deletions(-)
 create mode 100644 hw/usb/hcd-uhci-pci.c
 create mode 100644 hw/usb/hcd-uhci-pci.h
 create mode 100644 hw/usb/hcd-uhci-sysbus.c
 create mode 100644 hw/usb/hcd-uhci-sysbus.h