该系列文章总目录链接与各部分简介： Android Qcom USB Driver学习(零)
Android Qcom USB Driver学习(八)
Android Qcom USB Driver学习(九)
UCSI USB Type-C Connector System Software Interface Specification
DPM Device Policy Manager
deals with the USB Power Delivery resources used by one or more ports on the basis of the local device policy
the basis of the local device policy.
OPM OS Policy Manager
operating Software that interfaces with the PPM
PPM Platform Policy Manager
Hardware/firmware that manages all the USB Type-C connectors on the platform
LPM Local Policy Manger
Hardware/firmware that manages an individual USB Type-C connector.
TCP Typec-c PortController
What is Programmable Power Supply (PPS) Fast Charging?
PPS:Programmable Power Supply
PPS’ main advantage over other standards is its capability to lower conversion loss during charging. This means that less heat is generated, which lengthens the device battery’s lifespan.
USB-C Power Delivery
USB-C Power Delivery (PD) is a fast charging technology, supported by certain iOS/Apple® and Android™/Google™/Samsung® devices, that delivers much higher levels of power than standard charging. With up to 100W of power available, USB-C PD can even charge larger devices, like tablets and laptops. All you need is the right wall charger and USB-C cable – and leave those heavy laptop power cables at home.
PPS and PD protocols work together where the former can renegotiate non-standard currents and voltages between the device and the charger.
Qualcomm® Quick Charge
This technology powers your devices faster than conventional charging, allowing you to spend less time connected to outlets. As one of the most widely used of the fast charging technologies, Quick Charge is already in many of your favorite smartphones. If your smartphone is Quick Charge 3.0-compatible, you can charge up to 80% in just 35 minutes.Quick Charge 4+ is expected to work with USB Power Delivery, enabling Quick Charge accessories to fast charge a wider array of devices. On the other hand, Quick Charge 5 is the latest in Quick Charge standards and can recharge smartphones up to 50% in just 5 minutes.
USB Charging Type Identification
Typec_legacy_cable: SDP/CDP/DCP/Float/OCP
BC1.2 Primary/Secondary detect
Typec_nolegacy_cable: PPS/PD/QC
if PPS or PD
Typec Partner Type
else
if PD Failed or Legacy Cable
if USB DCP + TYPEC 3A
Typec Partner Type(DCP MAX 1.5A)
else
if USB DCP
if QC Failed
USB Partner Type DCP
else
USB Partner Type QC
else
USB Partner Type Legacy
else
None Partner Type
Qcom Charger Basic Process
SBL
UEFI
ADSP
Kernel
adsp-loader.c subsystem_get("adsp") reload adsp
Android Qcom USB Driver学习(十三)
Android Qcom USB Driver学习(十三)
Android Qcom USB Driver学习(十三)
Android Qcom USB Driver学习(十三)
Android Qcom USB Driver学习(十三)
Android Qcom USB Driver学习(十三)
Android Qcom USB Driver学习(十三)
Android Qcom USB Driver学习(十三)
Android Qcom USB Driver学习(十三)
Android Qcom USB Driver学习(十三)