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nuttx/drivers/usbhost
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Justin Hammond c288d9f9e4 drivers/usbhost: Compute the event ring segment count at full width. 
The number of event ring segments a controller allows is a power of two
reported as its exponent, and the exponent can reach 15.  Computing
1 << exponent into the uint8_t that holds it wraps to zero on any
controller offering more than 128 segments, and a controller told its
event ring table holds no entries has nowhere to report anything: every
command times out.

Work it out at full width and narrow afterwards.

Assisted-by: Claude:claude-opus-5
Signed-off-by: Justin Hammond <justin@dynam.ac>
2026-09-20 22:28:07 +08:00
..
CMakeLists.txt drivers/usbhost: Separate the xHCI driver from the PCI bus. 2026-08-18 09:35:23 -03:00
hid_parser.c include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
Kconfig drivers/usbhost: Separate the xHCI driver from the PCI bus. 2026-08-18 09:35:23 -03:00
Make.defs drivers/usbhost: Separate the xHCI driver from the PCI bus. 2026-08-18 09:35:23 -03:00
usbhost_bthci.c include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
usbhost_cdcacm.c include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
usbhost_cdcecm.c drivers/usbhost/usbhost_cdcecm.c: Converted CDC-ECM to lower half 2026-05-06 06:20:03 +08:00
usbhost_cdcmbim.c drivers/: Multiple Drivers Are Registered With World Writable - Part 2 2026-07-15 15:27:28 +08:00
usbhost_composite.c include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
usbhost_composite.h
usbhost_devaddr.c include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
usbhost_drivers.c include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
usbhost_enumerate.c usbhost: Report each device as it is enumerated. 2026-08-09 02:09:47 +08:00
usbhost_findclass.c include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
usbhost_ft232r.c include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
usbhost_hidkbd.c drivers/usbhost: Do not unregister a HID keyboard that never registered. 2026-08-09 20:57:41 +08:00
usbhost_hidmouse.c drivers/: Multiple Drivers Are Registered With World Writable - Part 2 2026-07-15 15:27:28 +08:00
usbhost_hub.c arch/arm/src/stm32h5/stm32_usbdrdhost.c: Fixed Hub support 2026-04-19 14:24:40 +08:00
usbhost_max3421e.c include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
usbhost_registerclass.c drivers/usbhost: Refuse to register the same class driver twice. 2026-08-08 14:55:34 -03:00
usbhost_registry.c drivers/usbhost: Use small lock to protect usbhost common function 2025-12-13 12:39:48 +08:00
usbhost_registry.h drivers/usbhost: Use small lock to protect usbhost common function 2025-12-13 12:39:48 +08:00
usbhost_skeleton.c include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
usbhost_storage.c drivers/usbhost: Register the partitions on a mass storage device. 2026-08-08 14:40:52 -03:00
usbhost_trace.c include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
usbhost_waiter.c include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
usbhost_xboxcontroller.c drivers/: Multiple Drivers Are Registered With World Writable - Part 2 2026-07-15 15:27:28 +08:00
usbhost_xhci.c drivers/usbhost: Compute the event ring segment count at full width. 2026-09-20 22:28:07 +08:00
usbhost_xhci.h drivers/usbhost: Set the xHCI interrupter moderation interval. 2026-09-20 22:28:07 +08:00
usbhost_xhci_pci.c drivers/usbhost: Separate the xHCI driver from the PCI bus. 2026-08-18 09:35:23 -03:00
usbhost_xhci_trace.c drivers/usbhost: Correct the xHCI controller name in a trace string. 2026-08-08 14:55:00 -03:00
usbhost_xhci_trace.h drivers/usbhost: Define the xHCI endpoint-allocation trace. 2026-08-08 14:55:00 -03:00