diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2018-05-04 06:59:43 +1000 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2018-05-15 10:06:53 +0300 |
| commit | 7ecca2a4080cb6b1fa174adc588fce9e9014c43c (patch) | |
| tree | 5b7fd3cbe77e1d25dab6769b73c9e0b5bf4ee1ba /drivers/usb/gadget/udc/Kconfig | |
| parent | 655016dc2d30379a417404ae88df9bfb7ede38e6 (diff) | |
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/Kconfig')
| -rw-r--r-- | drivers/usb/gadget/udc/Kconfig | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig index 0875d38476ee..b838caeaaaa1 100644 --- a/drivers/usb/gadget/udc/Kconfig +++ b/drivers/usb/gadget/udc/Kconfig @@ -438,6 +438,8 @@ config USB_GADGET_XILINX dynamically linked module called "udc-xilinx" and force all gadget drivers to also be dynamically linked. +source "drivers/usb/gadget/udc/aspeed-vhub/Kconfig" + # # LAST -- dummy/emulated controller # |