kernel/drivers/usb/chipidea, branch linux-5.1.y

usb: chipidea: udc: workaround for endpoint conflict issue

2019-06-25T03:34:44Z

commit c19dffc0a9511a7d7493ec21019aefd97e9a111b upstream. An endpoint conflict occurs when the USB is working in device mode during an isochronous communication. When the endpointA IN direction is an isochronous IN endpoint, and the host sends an IN token to endpointA on another device, then the OUT transaction may be missed regardless the OUT endpoint number. Generally, this occurs when the device is connected to the host through a hub and other devices are connected to the same hub. The affected OUT endpoint can be either control, bulk, isochronous, or an interrupt endpoint. After the OUT endpoint is primed, if an IN token to the same endpoint number on another device is received, then the OUT endpoint may be unprimed (cannot be detected by software), which causes this endpoint to no longer respond to the host OUT token, and thus, no corresponding interrupt occurs. There is no good workaround for this issue, the only thing the software could do is numbering isochronous IN from the highest endpoint since we have observed most of device number endpoint from the lowest. Cc: #v3.14+ Cc: Fabio Estevam Cc: Greg KH Cc: Sergei Shtylyov Cc: Jun Li Signed-off-by: Peter Chen Signed-off-by: Greg Kroah-Hartman

usb: chipidea: Refactor USB PHY selection and keep a single PHY

2019-02-27T14:51:02Z

Refactor the code in charge of looking up the USB PHY when no platdata is provided. Attempt to get a generic USB PHY first, then look for a legacy USB PHY through device-tree and finally get any registered PHY with the correct type. This way, only a single USB PHY is obtained and the flow is easier to understand and follow. All error pointers (except for EPROBE_DEFER) are considered as PHY not found. Signed-off-by: Paul Kocialkowski Signed-off-by: Peter Chen Signed-off-by: Greg Kroah-Hartman

usb: chipidea: Grab the (legacy) USB PHY by phandle first

2019-02-27T14:51:02Z

According to the chipidea driver bindings, the USB PHY is specified via the "phys" phandle node. However, this only takes effect for USB PHYs that use the common PHY framework. For legacy USB PHYs, a simple lookup based on the USB PHY type is done instead. This does not play out well when more than one USB PHY is registered, since the first registered PHY matching the type will always be returned regardless of what the driver was bound to. Fix this by looking up the PHY based on the "phys" phandle node. Although generic PHYs are rather matched by their "phys-name" and not the "phys" phandle directly, there is no helper for similar lookup on legacy PHYs and it's probably not worth the effort to add it. When no legacy USB PHY is found by phandle, fallback to grabbing any registered USB2 PHY. This ensures backward compatibility if some users were actually relying on this mechanism. Signed-off-by: Paul Kocialkowski Signed-off-by: Peter Chen Signed-off-by: Greg Kroah-Hartman

usb: chipidea: imx: set power polarity

2019-02-27T14:51:02Z

This patch adds support to set the power line polarity for i.MX SoCs. To let the USB controller control the power it may be necessary to configure the polarity of the power line. So far the polarity was configured by Bootloader or alternatively the power line was muxed as gpio and driven by a regulator. Also make use of of_property_read_bool. Signed-off-by: Philipp Puschmann Signed-off-by: Peter Chen Signed-off-by: Greg Kroah-Hartman

usb: chipidea: imx: remove unused header files

2019-02-27T14:51:01Z

Those 2 headers files are not required now. Signed-off-by: Jun Li Signed-off-by: Peter Chen Signed-off-by: Greg Kroah-Hartman

usb: chipidea: tegra: Fix missed ci_hdrc_remove_device()

2019-02-26T10:57:38Z

The ChipIdea's platform device need to be unregistered on Tegra's driver module removal. Fixes: dfebb5f43a78827a ("usb: chipidea: Add support for Tegra20/30/114/124") Signed-off-by: Dmitry Osipenko Acked-by: Peter Chen Cc: stable Signed-off-by: Greg Kroah-Hartman

Merge 5.0-rc4 into usb-next

2019-01-28T07:44:58Z

We need the USB fixes in here as well. Signed-off-by: Greg Kroah-Hartman

USB: add missing SPDX lines to Kconfig and Makefiles

2019-01-22T08:08:17Z

There are a few remaining drivers/usb/ files that do not have SPDX identifiers in them, all of these are either Kconfig or Makefiles. Add the correct GPL-2.0 identifier to them to make scanning tools happy. Signed-off-by: Greg Kroah-Hartman

usb: chipidea: fix static checker warning for NULL pointer

2019-01-18T08:35:33Z

During the static checker, "data->usbmisc_data" may be NULL. Fix it by adding this pointer judgement before using. Reported-by: Dan Carpenter Signed-off-by: Peter Chen Cc: stable Signed-off-by: Greg Kroah-Hartman

usb: chipidea: imx: allow to configure oc polarity on i.MX25

2018-12-11T01:13:11Z

Up to now the polarity of the over current pin was hard coded to active high. Use the already defined device tree properties to configure polarity on i.MX25, too. In difference to i.MX6/7 use active high behavior if the polarity is unspecified to keep compatibility to existing device trees. Signed-off-by: Uwe Kleine-König Signed-off-by: Peter Chen