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The Linux kernel configuration item CONFIG_USB_DUMMY_HCD
has multiple definitions:
drivers/usb/gadget/udc/Kconfig
The configuration item CONFIG_USB_DUMMY_HCD:
CONFIG_USB = CONFIG_y || ( CONFIG_USB = CONFIG_m && CONFIG_USB_GADGET = CONFIG_m )
dummy_hcd
, dummy_hcd
This host controller driver emulates USB, looping all data transfer requests back to a USB "gadget driver" in the same host. The host side is the controller; the gadget side is the device. Gadget drivers can be high, full, or low speed; and they have access to endpoints like those from NET2280, PXA2xx, or SA1100 hardware.
This may help in some stages of creating a driver to embed in a Linux device, since it lets you debug several parts of the gadget driver without its hardware or drivers being involved.
Since such a gadget side driver needs to interoperate with a host side Linux-USB device driver, this may help to debug both sides of a USB protocol stack.
Say "y" to link the driver statically, or "m" to build a dynamically linked module called "dummy_hcd" and force all gadget drivers to also be dynamically linked.
drivers/usb/gadget/Kconfig
The configuration item CONFIG_USB_DUMMY_HCD:
CONFIG_USB = CONFIG_y || ( CONFIG_USB = CONFIG_m && CONFIG_USB_GADGET = CONFIG_m )
dummy_hcd
, dummy_hcd
This host controller driver emulates USB, looping all data transfer requests back to a USB "gadget driver" in the same host. The host side is the master; the gadget side is the slave. Gadget drivers can be high, full, or low speed; and they have access to endpoints like those from NET2280, PXA2xx, or SA1100 hardware.
This may help in some stages of creating a driver to embed in a Linux device, since it lets you debug several parts of the gadget driver without its hardware or drivers being involved.
Since such a gadget side driver needs to interoperate with a host side Linux-USB device driver, this may help to debug both sides of a USB protocol stack.
Say "y" to link the driver statically, or "m" to build a dynamically linked module called "dummy_hcd" and force all gadget drivers to also be dynamically linked.
drivers/usb/gadget/Kconfig
The configuration item CONFIG_USB_DUMMY_HCD:
CONFIG_USB_GADGET_DUMMY_HCD
dummy_hcd
, dummy_hcd
(none)
Raw data from LKDDb:
lkddb module dummy_hcd CONFIG_USB_DUMMY_HCD : drivers/usb/gadget/Kconfig : "Dummy HCD (DEVELOPMENT)" # in 2.6.6–2.6.39, 3.0–3.16
lkddb module dummy_hcd CONFIG_USB_DUMMY_HCD : drivers/usb/gadget/udc/Kconfig : "Dummy HCD (DEVELOPMENT)" # in 3.17–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.11, 6.12-rc+HEAD
lkddb platform "dummy_hcd" : CONFIG_OF CONFIG_PCI CONFIG_USB CONFIG_USB_DUMMY_HCD CONFIG_USB_GADGET CONFIG_USB_PHY : drivers/usb/gadget/udc/dummy_hcd.c # in 4.12–4.14
lkddb platform "dummy_hcd" : CONFIG_OF CONFIG_PCI CONFIG_USB CONFIG_USB_DUMMY_HCD CONFIG_USB_GADGET CONFIG_USB_PHY CONFIG_USB_SUPPORT : drivers/usb/gadget/udc/dummy_hcd.c # in 4.15–4.20, 5.0–5.19, 6.0–6.11, 6.12-rc+HEAD
lkddb platform "dummy_hcd" : CONFIG_PCI CONFIG_USB CONFIG_USB_DUMMY_HCD CONFIG_USB_GADGET : drivers/usb/gadget/dummy_hcd.c # in 2.6.15–2.6.39
lkddb platform "dummy_hcd" : CONFIG_PCI CONFIG_USB CONFIG_USB_DUMMY_HCD CONFIG_USB_GADGET CONFIG_USB_OTG_UTILS : drivers/usb/gadget/dummy_hcd.c # in 3.0–3.9
lkddb platform "dummy_hcd" : CONFIG_PCI CONFIG_USB CONFIG_USB_DUMMY_HCD CONFIG_USB_GADGET CONFIG_USB_PHY : drivers/usb/gadget/dummy_hcd.c # in 3.10–3.16
lkddb platform "dummy_hcd" : CONFIG_PCI CONFIG_USB CONFIG_USB_DUMMY_HCD CONFIG_USB_GADGET CONFIG_USB_PHY : drivers/usb/gadget/udc/dummy_hcd.c # in 3.17–3.19, 4.0–4.11
lkddb platform "dummy_udc" : CONFIG_OF CONFIG_PCI CONFIG_USB CONFIG_USB_DUMMY_HCD CONFIG_USB_GADGET CONFIG_USB_PHY : drivers/usb/gadget/udc/dummy_hcd.c # in 4.12–4.14
lkddb platform "dummy_udc" : CONFIG_OF CONFIG_PCI CONFIG_USB CONFIG_USB_DUMMY_HCD CONFIG_USB_GADGET CONFIG_USB_PHY CONFIG_USB_SUPPORT : drivers/usb/gadget/udc/dummy_hcd.c # in 4.15–4.20, 5.0–5.19, 6.0–6.11, 6.12-rc+HEAD
lkddb platform "dummy_udc" : CONFIG_PCI CONFIG_USB CONFIG_USB_DUMMY_HCD CONFIG_USB_GADGET : drivers/usb/gadget/dummy_hcd.c # in 2.6.15–2.6.39
lkddb platform "dummy_udc" : CONFIG_PCI CONFIG_USB CONFIG_USB_DUMMY_HCD CONFIG_USB_GADGET CONFIG_USB_OTG_UTILS : drivers/usb/gadget/dummy_hcd.c # in 3.0–3.9
lkddb platform "dummy_udc" : CONFIG_PCI CONFIG_USB CONFIG_USB_DUMMY_HCD CONFIG_USB_GADGET CONFIG_USB_PHY : drivers/usb/gadget/dummy_hcd.c # in 3.10–3.16
lkddb platform "dummy_udc" : CONFIG_PCI CONFIG_USB CONFIG_USB_DUMMY_HCD CONFIG_USB_GADGET CONFIG_USB_PHY : drivers/usb/gadget/udc/dummy_hcd.c # in 3.17–3.19, 4.0–4.11
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Automatically generated (in year 2024). See also LKDDb sources on GitLab