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9af6540381
A controller reaches a device by the path to it and, for a slow device, through the hub that translates for it. Neither was described, so a device behind a hub was addressed as though it were on the root port. The route string is that path: each hub between the device and the root contributes a nibble holding the port the next thing down occupies, tier nearest the root in the lowest nibble. Walking up from the device reaches the deepest tier first, so shifting left by a nibble each time leaves them in the order the field wants. The walk stops after five, which is what the field holds and what USB allows, and a port above fifteen is clamped. Slot context dword 2 names the transaction translator carrying a low or full speed device behind a high speed hub. It reports the hub by slot, where EHCI reports it by USB address, and it names the nearest high speed ancestor rather than the immediate parent, since a full speed hub below a high speed one is itself carried by the translator above it. The think time comes from the hub descriptor by way of the hub class driver, in the same units. xhci_epalloc() carried a copy of sam_ehci.c's block, writing epinfo->hubaddr and epinfo->hubport, which is how EHCI describes a split transaction in its queue head. This driver never read either field, and xHCI wants the information in the slot context. Both fields and the code setting them are removed. Multi-TT is not set, for the reason given in the previous commit. No functional change: hubs cannot be enabled yet, and a device on a root port has neither hubs above it nor a translator. Assisted-by: Claude:claude-opus-5 Signed-off-by: Justin Hammond <justin@dynam.ac> |
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| .. | ||
| CMakeLists.txt | ||
| hid_parser.c | ||
| Kconfig | ||
| Make.defs | ||
| usbhost_bthci.c | ||
| usbhost_cdcacm.c | ||
| usbhost_cdcecm.c | ||
| usbhost_cdcmbim.c | ||
| usbhost_composite.c | ||
| usbhost_composite.h | ||
| usbhost_devaddr.c | ||
| usbhost_drivers.c | ||
| usbhost_enumerate.c | ||
| usbhost_findclass.c | ||
| usbhost_ft232r.c | ||
| usbhost_hidkbd.c | ||
| usbhost_hidmouse.c | ||
| usbhost_hub.c | ||
| usbhost_max3421e.c | ||
| usbhost_registerclass.c | ||
| usbhost_registry.c | ||
| usbhost_registry.h | ||
| usbhost_skeleton.c | ||
| usbhost_storage.c | ||
| usbhost_trace.c | ||
| usbhost_waiter.c | ||
| usbhost_xboxcontroller.c | ||
| usbhost_xhci.c | ||
| usbhost_xhci.h | ||
| usbhost_xhci_pci.c | ||
| usbhost_xhci_trace.c | ||
| usbhost_xhci_trace.h | ||