USB power delivery controller sharing
A system for sharing a power delivery controller is described herein. The system includes a plurality of ports and a power delivery controller communicatively coupled to the plurality of ports. The power delivery controller is to send a first message to a particular port of the plurality of ports and remain connected to the particular port and enable power delivery to the particular port in response to a particular return message from the port.
1. A system for sharing a power delivery controller, comprising:
a plurality of ports; and
a power delivery controller communicatively coupled to the plurality of ports, and the power delivery controller is to:
rotate between the plurality of ports to determine a particular port of the plurality of ports that has access to the power delivery controller;
negotiate with the plurality of ports by advertising capabilities of a computing device that comprises the power delivery controller and the plurality of ports at each port of the plurality of ports;
send a first message to the particular port of the plurality of ports; and
remain connected to the particular port and enable power delivery to the particular port in response to a particular return message from the port.
2. The system of claim 1 , wherein the plurality of ports is connected to a cable.
3. The system of claim 1 , wherein the plurality of ports is connected to a plurality of devices.
4. The system of claim 1 , wherein the return message is a GoodCRC message.
5. The system of claim 1 ; wherein the return message is a Request message.
6. The system of claim 1 , comprising a plurality of dead battery (DB) modules corresponding to each of the plurality of ports, wherein each DB module is to enable charging of the system.
7. The system of claim 6 , wherein the DB modules are to emulate a minimal portion of a USB PD controller to support dead battery operation.
8. The system of claim 1 , wherein a second power delivery controller is communicatively coupled to the plurality of ports, and the power delivery controller or the second power delivery controller are connected to the particular port.
9. A method for sharing a power delivery controller, comprising:
polling a plurality of Universal Serial Bus (USB) ports by rotating between the plurality of ports to determine a particular port of the plurality of ports that has access to the power delivery controller;
negotiating with the plurality of ports by advertising capabilities of a computing device that comprises the power delivery controller and the plurality of ports at each port of the plurality of ports;
sending a first message to each port of the plurality of USB ports; and
coupling to a particular port of the plurality of ports in response to a return message from the particular port, wherein power is delivered to the particular port.
10. The method of claim 9 , wherein the plurality of ports is a group of ports connected to a plurality of cables.
11. The method of claim 9 , wherein the plurality of ports is a group of ports connected to a device plurality of devices.
12. The method of claim 9 , wherein the return message is a GoodCRC message.
13. The method of claim 9 ; wherein the return message is a Request message.
14. A tangible, non-transitory, computer-readable medium comprising code to direct a processor to:
rotate between a plurality of ports to determine a particular port of the plurality of ports that has access to the power delivery controller;
negotiate with the plurality of ports by advertising capabilities of a computing device that comprises a power delivery controller and the plurality of ports at each port of the plurality of ports;
send a first message to the particular port of the plurality of ports;
couple to the particular port of the plurality of ports in response to a return message from the port; and
deliver power to the particular port.
15. The computer-readable medium of claim 14 , wherein the processor is a power delivery controller.
16. The computer-readable medium of claim 14 , wherein the processor is a power delivery controller and the power delivery controller is to send a message to the plurality of ports, and couple with a port in response to a device requesting power at the port.
17. The computer-readable medium of claim 14 , wherein the plurality of ports is a group of ports connected to a plurality of cables.
18. The computer-readable medium of claim 14 , wherein the plurality of ports is a group of ports connected to a plurality of devices.
19. The computer-readable medium of claim 14 , wherein the return message is a GoodCRC message.
20. The computer-readable medium of claim 14 ; wherein the return message is a Request message.