diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2018-05-03 23:59:43 +0300 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2018-05-15 10:06:53 +0300 |
| commit | 7ecca2a4080cb6b1fa174adc588fce9e9014c43c (patch) | |
| tree | 5b7fd3cbe77e1d25dab6769b73c9e0b5bf4ee1ba /drivers/usb/gadget/udc/aspeed-vhub/Kconfig | |
| parent | 655016dc2d30379a417404ae88df9bfb7ede38e6 (diff) | |
| download | linux-7ecca2a4080cb6b1fa174adc588fce9e9014c43c.tar.xz | |
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: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/gadget/udc/aspeed-vhub/Kconfig')
| -rw-r--r-- | drivers/usb/gadget/udc/aspeed-vhub/Kconfig | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/Kconfig b/drivers/usb/gadget/udc/aspeed-vhub/Kconfig new file mode 100644 index 000000000000..f0cdf89b8503 --- /dev/null +++ b/drivers/usb/gadget/udc/aspeed-vhub/Kconfig @@ -0,0 +1,7 @@ +# 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 |