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| author | Wai-Hong Tam <waihong@google.com> | 2018-06-07 02:37:19 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2018-12-08 11:23:21 -0800 |
| commit | 89e13f198fce934b0f1452255b15f6244dbcabb7 (patch) | |
| tree | ffbdea99fdf4d6df1d2e4648eabe27d58fbcffa8 /driver | |
| parent | 7f325f2e91482aee604de71f19f6669762594818 (diff) | |
| download | chrome-ec-89e13f198fce934b0f1452255b15f6244dbcabb7.tar.gz | |
cheza: Mux the 1st-plugged UFP port which is not a charger
There are 2 USB-C ports. A user may plug a USB-C to USB-A male
cable to one of the ports; then EC should mux the port from USB
hub to AP's primary USB controller, which is configured to do USB
peripheral mode only.
The policy is to mux the first-plugged UFP port to AP, with the
following exception:
* If the partner port does PD and it advertises the USB communications
capable bit unset in the fixed-supply PDO, we believe the partner
port is a pure charger.
* If the BC1.2 chip detects the partner is not a SDP or CDP , we
believe the partner port is not a workstation.
Check the design doc at:
http://go/cheza-hs-mux
BRANCH=none
BUG=b:74395451, b:110803836
TEST=Check the following scenario:
* Plug charger w/ PD to P0, plug C-to-A to P1, check P1 mux to AP.
* Plug charger through hub to P0, plug C-to-A to P1, check P1 mux to AP.
* Continue the above case, boot into kernel and check USB peripheral mode.
* Plug BC1.2 charger to P0, plug C-to-A to P1, check P1 mux to AP.
* Plug charger w/o PD to P0, plug C-to-A to P1, check P0 mux to AP.
* Swap P0 and P1 for the above cases and check the results.
Change-Id: I4034fa66c0b27cc48d0959bb3f1750690ad5e3f7
Signed-off-by: Wai-Hong Tam <waihong@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1105404
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Diffstat (limited to 'driver')
| -rw-r--r-- | driver/bc12/pi3usb9281.c | 2 | ||||
| -rw-r--r-- | driver/pi3usb9281.h | 3 |
2 files changed, 4 insertions, 1 deletions
diff --git a/driver/bc12/pi3usb9281.c b/driver/bc12/pi3usb9281.c index f1bd3ce8d4..06a1efba61 100644 --- a/driver/bc12/pi3usb9281.c +++ b/driver/bc12/pi3usb9281.c @@ -183,7 +183,7 @@ static int pi3usb9281_get_interrupts(int port) return pi3usb9281_read(port, PI3USB9281_REG_INT); } -static int pi3usb9281_get_device_type(int port) +int pi3usb9281_get_device_type(int port) { return pi3usb9281_read(port, PI3USB9281_REG_DEV_TYPE) & 0x77; } diff --git a/driver/pi3usb9281.h b/driver/pi3usb9281.h index fe19f0e977..fd4375b9b1 100644 --- a/driver/pi3usb9281.h +++ b/driver/pi3usb9281.h @@ -74,4 +74,7 @@ extern struct pi3usb9281_config pi3usb9281_chips[]; /* Enable interrupts. */ int pi3usb9281_enable_interrupts(int port); +/* Get the device type */ +int pi3usb9281_get_device_type(int port); + #endif /* __CROS_EC_PI3USB9281_H */ |