Commit 7ecca2a4 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt Committed by Felipe Balbi

usb/gadget: Add driver for Aspeed SoC virtual hub

The Aspeed BMC SoCs support a "virtual hub" function. It provides some
HW support for a top-level USB2 hub behind which sit 5 gadget "ports".

This driver adds support for the full functionality, emulating the
hub standard requests and exposing 5 UDC gadget drivers corresponding
to the ports.

The hub itself has HW provided dedicated EP0 and EP1 (the latter for
hub interrupts). It also has dedicated EP0s for each function. For
other endpoints, there's a pool of 15 "generic" endpoints that are
shared among the ports.

The driver relies on my previous patch adding a "dispose" EP op to
handle EP allocation between ports. EPs are allocated from the shared
pool in the UDC "match_ep" callback and assigned to the UDC instance
(added to the gadget ep_list).

When the composite driver gets unbound, the new hook will allow the UDC
to clean things up and return those EPs to the shared pool.
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
parent 655016dc
...@@ -438,6 +438,8 @@ config USB_GADGET_XILINX ...@@ -438,6 +438,8 @@ config USB_GADGET_XILINX
dynamically linked module called "udc-xilinx" and force all dynamically linked module called "udc-xilinx" and force all
gadget drivers to also be dynamically linked. gadget drivers to also be dynamically linked.
source "drivers/usb/gadget/udc/aspeed-vhub/Kconfig"
# #
# LAST -- dummy/emulated controller # LAST -- dummy/emulated controller
# #
......
...@@ -39,4 +39,5 @@ obj-$(CONFIG_USB_MV_U3D) += mv_u3d_core.o ...@@ -39,4 +39,5 @@ obj-$(CONFIG_USB_MV_U3D) += mv_u3d_core.o
obj-$(CONFIG_USB_GR_UDC) += gr_udc.o obj-$(CONFIG_USB_GR_UDC) += gr_udc.o
obj-$(CONFIG_USB_GADGET_XILINX) += udc-xilinx.o obj-$(CONFIG_USB_GADGET_XILINX) += udc-xilinx.o
obj-$(CONFIG_USB_SNP_UDC_PLAT) += snps_udc_plat.o obj-$(CONFIG_USB_SNP_UDC_PLAT) += snps_udc_plat.o
obj-$(CONFIG_USB_ASPEED_VHUB) += aspeed-vhub/
obj-$(CONFIG_USB_BDC_UDC) += bdc/ obj-$(CONFIG_USB_BDC_UDC) += bdc/
# SPDX-License-Identifier: GPL-2.0+
config USB_ASPEED_VHUB
tristate "Aspeed vHub UDC driver"
depends on ARCH_ASPEED || COMPILE_TEST
help
USB peripheral controller for the Aspeed AST2500 family
SoCs supporting the "vHub" functionality and USB2.0
# SPDX-License-Identifier: GPL-2.0+
obj-$(CONFIG_USB_ASPEED_VHUB) += aspeed-vhub.o
aspeed-vhub-y := core.o ep0.o epn.o dev.o hub.o
This diff is collapsed.
This diff is collapsed.
This diff is collapsed.
This diff is collapsed.
This diff is collapsed.
This diff is collapsed.
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment