Initial USB page
This commit is contained in:
Aditya Prayoga
parent
8b8af0bb7f
commit
0f0cce1c87
5 changed files with 162 additions and 0 deletions
BIN
docs/helios64/img/usb/otb_cable_usb_c.jpg
Normal file
BIN
docs/helios64/img/usb/otb_cable_usb_c.jpg
Normal file
Binary file not shown.
|
After Width: | Height: | Size: 8.7 KiB |
BIN
docs/helios64/img/usb/usb_diagram.png
Normal file
BIN
docs/helios64/img/usb/usb_diagram.png
Normal file
Binary file not shown.
|
After Width: | Height: | Size: 38 KiB |
BIN
docs/helios64/img/usb/usb_mux.png
Normal file
BIN
docs/helios64/img/usb/usb_mux.png
Normal file
Binary file not shown.
|
After Width: | Height: | Size: 21 KiB |
161
docs/helios64/usb.md
Normal file
161
docs/helios64/usb.md
Normal file
|
|
@ -0,0 +1,161 @@
|
|||
|
||||
|
||||
## USB on RK3399
|
||||
There are two types of USB controller available on RK3399. Each type has two controller so total USB controllers is 4.
|
||||
|
||||
### Generic EHCI USB 2.0 Controller
|
||||
There are two controller of this type. This controller is Host only controller that is compatible with USB 2.0 and backward compatible with USB 1.1.
|
||||
Supported speed:
|
||||
|
||||
- High Speed (480 Mbps)
|
||||
|
||||
- Full Speed (12 Mbps)
|
||||
|
||||
- Low Speed (1.5 Mbps)
|
||||
|
||||
|
||||
### Synopsys DesignWare USB 3.0 Dual-Role Device Controller
|
||||
There are two controller of this type. This controller support On-The-Go /Dual Role which mean it can be configured as Host and also Device.
|
||||
Supported speed:
|
||||
|
||||
- Super Speed (5 Gbps)
|
||||
|
||||
- High Speed (480 Mbps)
|
||||
|
||||
- Full Speed (12 Mbps)
|
||||
|
||||
- Low Speed (1.5 Mbps)
|
||||
|
||||
The controller is connected to Rockchip Type-C PHY.
|
||||
|
||||
## USB on Helios64
|
||||
|
||||
|
||||
|
||||
One of EHCI Controller is connected to M.2 socket.
|
||||
|
||||
The first Synopsys DesignWare USB 3.0 Dual-Role Device Controller is connected to USB Type-C connector and configured as OTG with help of FUSB302.
|
||||
|
||||
The second Synopsys DesignWare USB 3.0 Dual-Role Device Controller is connected to USB Hub 3.1 Gen 1 and configured as Host only.
|
||||
|
||||
### Power Budget
|
||||
|
||||
Each of external USB port is protected by Power Distribution switch with following current limit.
|
||||
|
||||
| Port | Voltage | Maximum Current | Remarks |
|
||||
|------------|-------|------------------|---------|
|
||||
| USB 3.0 Upper Back Panel | 5V | 900 mA | |
|
||||
| USB 3.0 Lower Back Panel | 5V | 900 mA | |
|
||||
| USB 3.0 Front Panel | 5V | 900 mA | |
|
||||
| Type-C | 5V | 1200 mA | PDO source only |
|
||||
|
||||
|
||||
## USB Type-C Functionality on Helios64
|
||||
|
||||
To simplify the cabling, Helios64 is designed to have
|
||||
|
||||
|
||||
|
||||
### Serial Console
|
||||
|
||||
Serial Console of Helios64 is connected to FT232 USB Serial converter and the USB 2.0 signal of the FT232 is connected to USB 2.0 signals of USB Type-C Port.
|
||||
Refer to ***JUMPER PAGE***
|
||||
|
||||
|
||||
### DisplayPort Alternate Mode
|
||||
|
||||
Using USB Type-C to DisplayPort cable or USB Type-C to HDMI dongle, Helios64 can be connected to monitor to display Linux Desktop or other GUI application.
|
||||
|
||||
*** Put USB Type-C to DisplayPort cable photo here ***
|
||||
|
||||
*** Put USB Type-C to HDMI dongle photo here ***
|
||||
|
||||
!!! note
|
||||
DisplayPort Alternate Mode is NOT supported on U-Boot.
|
||||
|
||||
|
||||
### USB Host
|
||||
|
||||
Using OTG cable such as,
|
||||
|
||||
|
||||
|
||||
Helios64 can act as USB host and can be connected to various USB device.
|
||||
|
||||
### USB Device
|
||||
|
||||
Helios64 can be used as Direct Attached Storage (DAS) with proper configuration and kernel module. Refer to [Helios64 as Direct Attached Storage (DAS) device](#helios64-as-direct-attached-storage-das-device)
|
||||
|
||||
Helios64 can also used as "USB eMMC reader/writer" for OS recovery purpose. Refer to [USB OTG Port (USB Type-C)](#usb-otg-port-usb-type-c)
|
||||
|
||||
|
||||
## USB under U-Boot
|
||||
|
||||
### USB Host Port
|
||||
|
||||
USB Host support in U-Boot is quite minimal, it only support USB storage and USB ethernet.
|
||||
|
||||
### USB OTG Port (USB Type-C)
|
||||
|
||||
USB Type C port is configured as USB device mode as USB Mass Storage connected to eMMC.
|
||||
This function can be activated by pressing Recovery Button.
|
||||
This is to serve as a way to (re)install OS to eMMC.
|
||||
|
||||
|
||||
## USB under Linux
|
||||
|
||||
### USB Bus Mapping
|
||||
|
||||
| USB Controller | Bus number | Remarks |
|
||||
|----------------|------------|---------|
|
||||
| EHCI Host0 | 0 | |
|
||||
| EHCI Host1 | 1 | |
|
||||
| DWC3 Typec0 USB 3.0 | 2 | |
|
||||
| DWC3 Typec0 USB 2.0 | 3 | |
|
||||
| DWC3 Typec1 USB 3.0 | 4 | |
|
||||
| DWC3 Typec1 USB 2.0 | 5 | |
|
||||
|
||||
----- ***TBC*** ------
|
||||
|
||||
### Helios64 as Direct Attached Storage (DAS) device
|
||||
|
||||
Helios64 can be used as Direct Attached Storage (DAS) device with help of Linux USB Gadget kernel module.
|
||||
|
||||
The kernel moodule only export the underlying block device NOT the filesystem layer. Therefore if the block device is formatted with filesystem unique to Linux,
|
||||
the exported disk may not readable by computer that has Helios64 connected to.
|
||||
|
||||
For example, the block device is formatted with EXT4 filesystem and Helios64 connected to Windows PC as DAS,
|
||||
the Windows PC will not be able to read the disk content unless 3rd party software/driver installed.
|
||||
|
||||
|
||||
!!! warning
|
||||
Do NOT access Helios64 simultanouesly as DAS and NAS, as the filesystem is not managed by system and can lead to data corruption.
|
||||
|
||||
|
||||
#### Individual Disk Exported as Separate Disk
|
||||
|
||||
----- ***more info soon*** -----
|
||||
|
||||
```
|
||||
modprobe g_mass_storage file=/dev/sda,/dev/sdb,/dev/sdc,/dev/sdd,/dev/sde
|
||||
```
|
||||
|
||||
----- *** Put Windows Explorer & Disk management screenshot here *** -----
|
||||
|
||||
----- *** Put lsusb & lsblk here *** -----
|
||||
|
||||
|
||||
#### RAID device exported as One Disk
|
||||
|
||||
----- ***more info soon*** -----
|
||||
|
||||
```
|
||||
modprobe g_mass_storage file=/dev/md/md-raid6
|
||||
```
|
||||
|
||||
----- *** Put Windows Explorer & Disk management screenshot here *** -----
|
||||
|
||||
----- *** Put lsusb & lsblk here *** -----
|
||||
|
||||
|
||||
|
||||
|
|
@ -79,6 +79,7 @@ nav:
|
|||
- GPIO : 'helios64/gpio.md'
|
||||
- I2C : 'helios64/i2c.md'
|
||||
- LED : 'helios64/led.md'
|
||||
- USB : 'helios64/usb.md'
|
||||
- Helios4:
|
||||
- Introduction: 'helios4/intro.md'
|
||||
- Kit Assembly: 'helios4/kit.md'
|
||||
|
|
|
|||
Loading…
Reference in a new issue