diff options
| author | Todd Broch <tbroch@chromium.org> | 2015-02-06 17:13:53 -0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-04-21 08:09:30 +0200 |
| commit | df4081e72cda341236350647f96b419e03b9edce (patch) | |
| tree | 362ea983ebaad49b72dc6af92ab737cfe7707f2a /src/soc/intel/broadwell | |
| parent | 46d3ac1cbb76b721132e792c9e1a9d0e201d55d5 (diff) | |
broadwell: Clear USB3.0 PORTSC status bits in sleep_prepare.
Found that any non-USB3.0 devices connected to type-C ports
(displayPort dongles) cause XHCI port to see connection which in turn
leads us to enter USB compliance mode.
That in turn causes the port to wake the system for a yet-to-be
determined reason. Clearing the PORTSC status bits (actually just
CSC) seems to remedy the wake.
Signed-off-by: Todd Broch <tbroch@chromium.org>
BRANCH=samus
BUG=chrome-os-partner:35320
TEST=manual,
1. Plug hoho into type-C port on samus and remove
2. powerd_dbus_suspend
Device stays asleep.
Change-Id: Id3a291579ffca0152a7ef32e37ecae80ca08a82b
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 0be5cba4916681dceb0372e76d9643e6c7175db5
Original-Change-Id: I1396b9f8013dbbb31286c1d8958af592b3da7475
Original-Reviewed-on: https://chromium-review.googlesource.com/247410
Original-Commit-Queue: Todd Broch <tbroch@chromium.org>
Original-Tested-by: Todd Broch <tbroch@chromium.org>
Original-Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/9814
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/soc/intel/broadwell')
| -rw-r--r-- | src/soc/intel/broadwell/xhci.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/soc/intel/broadwell/xhci.c b/src/soc/intel/broadwell/xhci.c index cfd0c5692d..9d0390e1a2 100644 --- a/src/soc/intel/broadwell/xhci.c +++ b/src/soc/intel/broadwell/xhci.c @@ -179,6 +179,15 @@ void usb_xhci_sleep_prepare(device_t dev, u8 slp_typ) reg32 = read32(mem_base + 0x80e0); reg32 |= (1 << 15); write32(mem_base + 0x80e0, reg32); + } else { + /* + * Clear port change status bits. Clearing CSC alone seemed to + * fix wakeup from S3 if entering USB compliance state even if + * bit wasn't set on the port. + */ + int port; + for (port = 0; port < usb_xhci_port_count_usb3(dev); port++) + usb_xhci_reset_status_usb3(mem_base, port); } reg32 = read32(mem_base + 0x8154); |