Orca Usb_link Software USB Devices Driver

  
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Usb Link Cable Driver Software PL2303 USB to Serial Driver for Mac OS v.0.3.1 Supports different manufacturers of PL2303 based USB to serial dongles like ATEN, IOData, Elcom, Itegno, Ma620, Ratoc, Tripp, Radioshack, Dcu10, SiteCom, Alcatel, Samsung, Siemens, Syntech, Nokia, MS3303H - Some bug fixes - Added new vendor IDs. USB-Link™ Drivers 9.6.0.2 (8.9 MB) 125032 USB-Link™ WVL2 64-bit Drivers v3.2.5 (6.10 MB) 129048 Wireless Vehicle Link 2 (WVL2™). Download A Driver Connect to.

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nexiq drivers 9.5.0.1

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Introduction

DWC3 is a SuperSpeed (SS) USB 3.0 Dual-Role-Device (DRD) from Synopsys.

Main features of DWC3:

The SuperSpeed USB controller features:

  • Dual-role device (DRD) capability:
  • Same programming model for SuperSpeed (SS), High-Speed (HS),Full-Speed (FS), and Low-Speed (LS)
  • Internal DMA controller
  • LPM protocol in USB 2.0 and U0, U1, U2, and U3 states for USB 3.0

TI SoC Integration

DWC3 is integrated in AM65x, OMAP5, DRA7x and AM437x SoCs from TI.

OMAP5 (omap5-uevm)

The following diagram depicts dwc3 integration in OMAP5. The ID and VBUSevents are sensed by a companion device (palmas). The palmas-usb driver(drivers/extcon/extcon-palmas.c) notifies the events to OMAP glue driver(driver/usb/dwc3/dwc3-omap.c) via the extcon framework. The glue driverwrites the events to the software mailbox present in DWC3 glue (SS USBOTG controller module in the diagram) which interrupts the core usingUTMI+ signals.

DRA7x/AM57x

The above diagram also depicts dwc3 integration in DRA7x/AM57x. Someboards provide VBUS and ID events over GPIO whereas some provide ID overGPIO and VBUS through Power Management IC (palmas).

  • DRA7-evm (J6-evm) and DRA72-evm (J6-eco) boards have ID detection butno VBUS detection support. ID detection is provided through GPIOexpander (PCF8574).
  • DRA71-evm (J6entry-evm) board has VBUS and ID detection support. BothID and VBUS detection are provided through GPIO expander (PCF8574).

On these boards, the GPIO driver (drivers/extcon/extcon-usb-gpio.c)notifies the ID and VBUS events to the OMAP dwc3 glue(drivers/usb/dwc3/dwc3-omap.c) via the extcon framework.

All DRA7x boards use USB1 port as Super-Speed dual-role port and USB2port High-Speed Host port (Type mini-A). You will need a mini-A toType-A adapter to use the Host port.

AM57x (BeagleBoard-x15/AM57xx-evm/AM57xx-IDK)

  • BeagleBoard-x15/AM57xx-evm use USB1 as Super-Speed host port and havea on-board Super-Speed hub which provides 3 Super-Speed Host (Type-A)ports. USB2 is used as High-Speed peripheral port. VBUS detection forUSB2 port is provided through Power Management IC (palmas). Thepalmas USB driver (drivers/extcon/extcon-palmas.c) notifies the VBUSevent to the OMAP dwc3 glue (drivers/usb/dwc3/dwc3-omap.c) via theextcon framework.
  • AM57xx-IDK boards use USB1 as a High-Speed Host port (Type-A) andUSB2 as a High-Speed dual-role port. ID detection for USB2 isprovided via GPIO whereas VBUS detection is provided through the PMIC(palmas). The palmas USB driver (drivers/extcon/extcon-palmas.c)notifies both VBUS and ID events to the OMAP dwc3 glue(drivers/usb/dwc3/dwc3-omap.c) via the extcon framework.

AM65x

AM65x has 2 DWC3 controller instances. USB1 instance can be a super-speedport and USB2 instance is a high-speed port.The following diagram depicts dwc3 integration in AM65x’s high-speed port.VBUS and ID detection is done internally so companion device is not needed.DWC3 controller uses HW UTMI mode to get the VBUS and ID events and the gluedriver (dwc3-am65.c) does not need to write to the software mailbox tonotify the events to the dwc3 core.

  • On AM65x-evm/IDK, USB2 port is used as high-speed dual-role port (micro-AB)as shown in figure below.

Note

The board might come with force host jumper J4 pre-installed at thefactory. Please remove this jumper for proper dual-role/device-mode operationof USB2 port.

  • On AM65x-IDK, USB1 port is available as a high-speed dual-role port (micro-AB)through a 2Lane PCIe USB2 SERDES card. See below figure.

Note

AM65x-IDK might come with the force host jumper J5 pre-installedon the SERDES card. Please remove this jumper for proper dual-role/device modeoperation of USB1 port.

Free
  • On AM65x-evm, USB1 port is available as a Super-Speed device or host port(3.0 micro-AB) through a 1Lane PCIe USB3 SERDES card. See below figure.

Note

AM65x-evm might come with the force host jumper J5 pre-installedon the SERDES card. Please remove this jumper for proper dual-role/device modeoperation of USB1 port.

Features NOT supported

  • Full OTG is not supported. Only dual-role mode is supported.

Driver Configuration

The default kernel configuration enables support for USB_DWC3,USB_DWC3_OMAP (the wrapper driver), USB_DWC3_DUAL_ROLE.

The selection of DWC3 driver can be modified as follows: start LinuxKernel Configuration tool.

  • Select Device Drivers from the main menu.
  • Select USB support from the menu.
  • Enable Host-side support and Gadget support
  • Select DesignWare USB3 DRD Core Support and Texas Instruments OMAP5and similar Platforms
  • Select Bus devices OMAP2SCP driver
  • Select the PHY Subsystem for OMAP5, DRA7x and AM437x
  • Select the OMAP CONTRO PHY driver, OMAP USB2 PHY driver for OMAP5,DRA7 and AM437x
  • Select OMAP PIPE3 PHY driver for OMAP5 and DRA7x
  • Select ‘xHCI HCD (USB 3.0) SUPPORT’ from menuconfig in ‘USB support’
  • Select ‘USB Gadget Support —>’ from menuconfig in ‘USB support’ andselect the needed gadgets. (By default all gadgets are made asmodules)

Configuring DWC3 in gadget only

set ‘dr_mode’ as ‘peripheral’ in respective board dts files present inarch/arm/boot/dts/

  • omap5-uevm.dts for OMAP5
  • dra7-evm.dts for DRA7x
Usb

Configuring DWC3 in host only

set ‘dr_mode’ as ‘host’ in respective board dts files present inarch/arm/boot/dts/

  • omap5-uevm.dts for OMAP5
  • dra7-evm.dts for DRA7x

Testing

Host Mode

Selecting cables

OMAP5-uevm

OMAP5-evm has a single Super-Speed micro AB port provided by the DWC3controller. To use it in host mode a OTG adapter (Micro USB 3.0 9-PinMale to USB 3.0 Female OTG Cable) like below should be used. The ID pinwithin the adapter must be grounded. Some of the adapters available inthe market don’t have ID pin grounded. If the ID pin is not grounded thedual-role port will not switch from peripheral mode to host mode.

DRA7x-evm

DRA7x-evm has 2 USB ports provided by the DWC3 controllers. USB1 is aSuper-Speed port and USB2 is a High-Speed port. USB1 is by defaultconfigured in dual-role mode and USB2 is configured in host mode.

For connecting a device to the USB2 port use a mini-A to Type-A OTGadapter cable like this. The ID pin within the adapter cable must begrounded.

For using the USB1 port in host mode use a Super-Speed OTG adapter cablesimilar to the one used in OMAP5.

Example

Connecting a USB2.0 pendrive to the USB host port gives the following prints

Device Mode

Mass Storage Gadget

In gadget mode standard USB cables with micro plug should be used.

Example: To use ramdisk as a backing store use the following

In order to see all other options supported by g_mass_storage, justrun modinfo command:

Note: The USB Mass StorageSpecificationrequires us to pass a valid iSerialNumber of 12 alphanumeric digits,however g_mass_storage will not generate one because the Kernel has noway of generating a stable and valid Serial Number. If you want to passUSB20CV and USB30CV MSC tests, pass a valid iSerialNumber argument.

USB 2.0 Test Modes

The Universal Serial Bus 2.0Specificationdefines a set of Test Modes used to validate electrical quality of DataLines pair (D+/D-). There are two ways of entering these Test Modes withDWC3.

  • Sending properly formatted SetFeature(TEST) Requests to the device(see USB2.0specfor details)

This is the preferred (and Standard) way of entering USB 2.0 Test Modes.However, it’s not always that we will have a functioning USB Host toissue such requests.

  • Using a non-standardDebugFS interface (seebelow for details)

Any time we don’t have a functioning Host on the Test Setup and stillwant to enter USB 2.0 Test Modes, we can use this non-standardinterfacefor that purpose. One such use-case is for low level USB 2.0 Eye Diagramtesting where the DUT (Device Under Test) is connected to anoscilloscope through a test fixture.

Non-Standard DebugFS Interface

DWC3 Driver exposes a few testing and development tools through theDebug File System. In orderto use it, you must first mount that file system in case it’s notmounted yet. Below, we show an example session on AM437x.

Note the two directories terminated with .usb. Those are the twoinstances available on AM437x devices, 48390000.usb is USB1 and483d0000.usb is USB2. Both of those directories contain the same thing,we will use 48390000.usb for the purposes of illustration.

link_state

Shows the current USB Link State

mode

Shows the current mode of operation. Available options are host,device, otg. It can also be used to dynamically change the mode bywriting to this file any of the available options. Dynamically changingthe mode of operation can be useful for debug purposes but this shouldnever be used in production.

regdump

Shows a dump of all registers of DWC3 except for XHCI registers whichare owned by the xhci-hcd driver.

A better use for this is, if you know the register name you’re lookingfor, by using grep we can reduce the amount of output. Assuming wewant to check register DCTL we could:

testmode

Shows current USB 2.0 Test Mode. Can also be used to enter such testmodes in situations where we can’t issue proper SetFeature(TEST)requests. Available options are test_j, test_k, test_se0_nak,test_packet, test_force_enable. The only way to exit the testmodes is through a USB Reset.

Other Resources

For general Linux USB subsystem- Usbgeneralpage

USB Debugging- elinux.org/images/1/17/USB_Debugging_and_Profiling_Techniques.pdf