linux-toradex.git/drivers/usb/chipidea/host.c, branch v4.12

usb: chipidea: use bus->sysdev for DMA configuration

2017-03-23T07:20:21+00:00

Set the dma for chipidea from sysdev. This is inherited from its
parent node. Also, do not set dma mask for child as it is not required
now.

Signed-off-by: Arnd Bergmann 
Signed-off-by: Sriram Dash 
Acked-by: Peter Chen 
Signed-off-by: Mathias Nyman 
Signed-off-by: Peter Chen 
Signed-off-by: Greg Kroah-Hartman

usb: chipidea: msm: Handle phy power states

2017-01-20T07:27:35+00:00

The ULPI phy on qcom platforms needs to be initialized and
powered on after a USB reset and before we toggle the run/stop
bit. Otherwise, the phy locks up and doesn't work properly. Hook
the phy initialization into the RESET event and the phy power off
into the STOPPED event.

Acked-by: Peter Chen 
Cc: Greg Kroah-Hartman 
Signed-off-by: Stephen Boyd 
Signed-off-by: Peter Chen

usb: chipidea: Notify events when switching host mode

2017-01-20T03:25:06+00:00

The chipidea/udc.c file sends a CI_HDRC_CONTROLLER_RESET_EVENT to
the wrapper drivers when it calls hw_device_reset(), but that
function is not called from chipidea/host.c. And the udc.c file
sends the CI_HDRC_CONTROLLER_STOPPED_EVENT but the host.c file
doesn't do anything.

The intent of the reset event is to allow the wrapper driver to
do any wrapper specific things after the reset bit has been set
in the usb command register. Therefore, add this event hook in
the host role after we toggle that bit.

Similarly, the intent of the stopped event is to allow the
wrapper driver to do any wrapper specific things after the device
is stopped. So when we stop the host role, send the stopped
event.

Acked-by: Peter Chen 
Cc: Greg Kroah-Hartman 
Signed-off-by: Stephen Boyd 
Signed-off-by: Peter Chen

usb: chipidea: host: fix NULL ptr dereference during shutdown

2016-10-25T08:14:32+00:00

After commit b09b5224fe86 ("usb: chipidea: implement platform shutdown
callback") and commit 43a404577a93 ("usb: chipidea: host: set host to
be null after hcd is freed") a NULL pointer dereference is caused
on i.MX23 during shutdown. So ensure that role is set to CI_ROLE_END and
we finish interrupt handling before the hcd is deallocated. This avoids
the NULL pointer dereference.

Suggested-by: Alan Stern 
Signed-off-by: Stefan Wahren 
Fixes: b09b5224fe86 ("usb: chipidea: implement platform shutdown callback")
Signed-off-by: Peter Chen

usb: chipidea: host: disable io watchdog

2016-09-14T02:58:13+00:00

The Chipidea EHCI core seems to behave sanely and doesn't need
the IO watchdog. This kills off 10 non-deferrable wakeup events
per second when the controller is otherwise idle.

Signed-off-by: Lucas Stach 
Tested-by: Stefan Agner 
Signed-off-by: Peter Chen

usb: chipidea: host: set host to be null after hcd is freed

2015-12-24T06:17:58+00:00

Set ci->hcd and ci->otg.host to be null in host_stop since the
hcd already freed.

Signed-off-by: Li Jun 
Signed-off-by: Peter Chen

usb: chipidea: host: override hcd reset API

2015-08-14T01:13:13+00:00

The system configuration API should be called before the controller
run, otherwise, undefined results may occur. So, we override hcd
reset API, and add system configuration API after controller reset.

Cc: Li Jun 
Cc: Alan Stern 
Acked-by: Alan Stern 
Signed-off-by: Peter Chen

usb: chipidea: host: delete the redundancy ci_hdrc struct

2015-08-14T01:13:12+00:00

The struct ci_hdrc is the drvdata for hcd device, so we don't
need to introduce extra ci_hdrc structure for ehci.

Signed-off-by: Peter Chen

usb: chipidea: introduce ci_platform_configure

2015-08-14T01:13:11+00:00

It is used to configure controller parameters according to
platform data, like speed, stream mode, etc, both host and
device's initialization need it, most of code are the
same for both roles, with this new interface, it can reduce
the duplicated code and be easy to maintain in future.

Signed-off-by: Peter Chen

usb: chipidea: add ttctrl.ttha control interface

2015-08-14T01:13:10+00:00

The register of ttctrl.ttha describes like below:
- Internal TT Hub Address Representation
- RW
- Default = 0000000b
This field is used to match against the Hub Address field in QH & siTD
to determine if the packet is routed to the internal TT for directly
attached FS/LS devices. If the Hub Address in the QH or siTD does not
match this address then the packet will be broadcast on the High Speed
ports destined for a downstream High Speed hub with the address in the QH/siTD.

In silicon RTL, this entry only affects QH and siTD, and the hub.addr at
both QH and siTD are 0 in ehci core for chipidea (with hcd->has_tt = 1).

So, for QH, if the "usage_tt" flag at RTL is 0, set CI_HDRC_SET_NON_ZERO_TTHA
will not affect QH (with non-hs device); for siTD, set this flag
will change remaining space requirement for the last transaction from 1023
bytes to 188 bytes, it can increase the number of transactions within one
frame, ehci periodic schedule code will not queue the packet if the frame space
is full, so it is safe to set this flag for siTD.

With this flag, it can fix the problem Alan Stern reported below:
http://www.spinics.net/lists/linux-usb/msg123125.html
And may fix Michael Tessier's problem too.
http://www.spinics.net/lists/linux-usb/msg118679.html

CC: stern@rowland.harvard.edu
CC: michael.tessier@axiontech.ca
Signed-off-by: Peter Chen