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| author | Todd Broch <tbroch@chromium.org> | 2014-10-03 17:22:42 -0700 |
|---|---|---|
| committer | chrome-internal-fetch <chrome-internal-fetch@google.com> | 2014-10-11 02:22:23 +0000 |
| commit | 44e4f7cfe7953198091cfd5e39bf339a770138dc (patch) | |
| tree | bce95eac678d68d40be59276b4aaf94a488cea25 /common/usb_pd_policy.c | |
| parent | 4d81320ed8b5f8231759d1608183a0daf233ea45 (diff) | |
| download | chrome-ec-44e4f7cfe7953198091cfd5e39bf339a770138dc.tar.gz | |
usb: Groundwork for USB BOS & Billboard class descriptors.
The BOS (Binary Device Object Store) descriptor was added to the USB
specification (3.0) to allow a richer set of device capability
specific descriptors.
The Billboard class is meant to expose (read-only) the status of USB
devices capable of alternate mode functions. It's required to use the
BOS descriptor type and at a high level looks like:
- BOS Device Descriptor (5bytes)
- Container ID Device Capability Descriptor (20bytes)
- Billboard Device Capability Descriptor (44byte + 4 * numSVIDs)
This CL adds:
1. Ability for Get Descriptor on BOS descriptors. Note hidden behind
CONFIG_USB_BOS as these descriptors change USB device requirements
to:
- bcdUSB >= 0201
- no interface descriptors
2. structures for all BOS, Container & Billboard descriptor elements
complete w/ CamelCase.
BRANCH=none
BUG=chrome-os-partner:32652
TEST=compiles with CONFIG_USB & CONFIG_USB_BOS enabled.
Change-Id: I1b24bc728f2ebba7d91840801d2ebe576e240e7c
Signed-off-by: Todd Broch <tbroch@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/221570
Diffstat (limited to 'common/usb_pd_policy.c')
0 files changed, 0 insertions, 0 deletions