Jabra USB Devices Driver

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USB Device vendors use co-installers to update device firmware for devices that use inbox USB device drivers. However, co-installers are not supported by the new 'Universal INF' standard, which is a requirement on Windows 10. This poses a challenge to existing USB device firmware update process. This topic outlines a recommend way to update USB device firmware without a co-installer.

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Requirements

The primary requirements from the USB device firmware update process are:

Seamless firmware update with no user interaction
Reliable recovery mechanism (for example, no bricking of devices)
Works on Windows 7 and later

Overview

USB devices like UVC cameras are released with in-field updatable firmware. There is no standard way to update the firmware today. One thing that is common to all existing update mechanism is that some custom software suite runs on the client and downloads the firmware to the device. Typically, as part of the device installation process, the firmware updating software suite is installed. The co-installer kick starts the firmware update process. The absence of co-installers on Windows 10 prevents device vendors from updating the firmware on these devices in the field.

The recommended way to circumvent the absence of a co-installer for the USB device firmware update scenario is to use a lower filter driver to the USB device that will kick start the firmware update process. During the AddDevice call, the filter driver will check the device firmware version and update the firmware if necessary.

Firmware update overview

When a USB device is plugged in to the system, the generic inbox driver is installed for the device. After the installation of the generic driver, the OS queries the Windows Update server for any vendor specific driver package availability and downloads it and installs the driver. The installed driver package will perform the firmware update.

There are two ways the firmware could be updated.

Firmware Update Filter Driver
1. A vendor supplied lower filter driver that performs the firmware update.
Firmware Update Device Driver
1. A vendor supplied lower filter driver that puts the device in 'firmware update mode'.
2. The device enumerates as a firmware update device.
3. Vendor supplied firmware update driver will load against this device and updates the firmware.

Method 1: Firmware Update Filter Driver

In this method, a lower filter driver to the USB device driver will be installed as part of driver update process. This filter driver will perform the firmware update.

The driver update package on the Windows Update server will contain:

A firmware update WDF lower filter driver
An extension INF to install the firmware update WDF lower filter driver
The 'firmware.bin' file

While installing the driver update package, the firmware update WDF filter driver’s AddDevice routine will be called. From this routine, the WDF filter driver will get for the device firmware version from the device HW registry key. The device firmware should have placed the firmware version using the MSOS descriptor onto the device HW registry key.

If the device firmware version and the filter driver expected firmware version are different, or
The firmware version is not available in the device HW registry key
1. Then, the filter driver will insert itself into the device stack by returning success to AddDevice callback.
Else, the filter driver will not insert itself into the device stack
1. Because there is no necessity for updating the firmware as the device has the expected firmware.

When the EVT_WDF_DEVICE_D0_ENTRY callback of the WDF filter driver is called at a later point, the filter driver must register for device interface change notifications using CM_Register_Notification or IoRegisterPlugPlayNotification (UMDF or KMDF) to listen to the device interface class the USB device will register the device into. E.g. The firmware update filter driver for a RGB camera would register for KSCATEGORY_VIDEO_CAMERA. On receiving the notification, the filter driver should post a work-item that would perform the firmware update.

UMDF based firmware update drivers can use the device specific APIs or issue the control transfers directly to access the USB device to perform the firmware update. For example, the UMDF based filter driver for a camera would use Camera APIs to perform the firmware update.

KMDF based firmware update drivers can send the vendor specific commands to perform the firmware update.

On completion of flashing the firmware, the device must disconnect and reconnect to the bus. The device will be re-enumerated with new firmware.

The method of using a 'firmware update filter driver', is recommended for devices that have enough resources to hold two full firmware images (the update image and a backup image) on the device memory. The reason is if there were failures during downloading the updated firmware, the device can abandon the update and boot into its original firmware. Thus, not bricking the device.

Method 2: Firmware Update Device Driver

In this method, a lower filter driver to the USB device will be installed as part of the driver update process. This filter driver will send a command to the device to restart in firmware update mode, where the device exposes a firmware update interface. The driver for the firmware update interface will load and perform the firmware update.

The driver update package on Windows Update server for the device will contain:

A WDF lower filter driver that will place the device in firmware update mode
An extension INF to install the WDF lower filter driver

In addition to the driver update package, a separate Firmware Update Device Driver package will be present on Windows Update, with:

A WDF firmware update device driver and its INF, and
The 'firmware.bin' file.

While installing the driver update package, the WDF lower filter driver’s AddDevice routine will be called. From this routine, the filter driver will query for the device firmware version from the device HW registry key. The device firmware should have placed the 'firmware version', using the MSOS descriptor or the USB device’s extension INF, onto the device HW registry key.

If the device firmware version and the filter driver expected firmware versions are different or
The firmware version is not available in the device HW registry key
Then, the WDF filter driver will insert itself into the device stack.
Else, the WDF filter driver will not insert itself into the device stack

When the EVT_WDF_DEVICE_D0_ENTRY callback of the WDF filter driver is called at a later point, the filter driver will issue a vendor specific command to the device which will place it in firmware update mode. i.e. The device will disconnect and reconnect, exposing the firmware update interface.

The system will enumerate the firmware update device interface. A custom firmware update WDF driver supplied by the vendor, in the firmware update package, will be load for this firmware update interface. This driver will update the firmware.

When the EVT_WDF_DEVICE_D0_ENTRY callback of the WDF firmware update driver is called at a later point, the driver must post a work-item that would perform the firmware update.

On completion of flashing the firmware, the device must disconnect and reconnect to the bus. The device will be re-enumerated with new firmware.

This method is recommended for devices that cannot hold the updated and original firmware images due to shortage of memory on the device. The reason is if there were failures during downloading the updated firmware, the device can abandon the update and boot the device into its firmware update mode again and the firmware update can be retried. Thus, not bricking the device.

Recovery

The firmware update process can fail for various reasons. If that happens, when the device is enumerated again, the firmware update driver may try to update the firmware again and may fail again and this update process could end up in a loop. The firmware update driver must put an upper limit to the number of retries it can perform. When the firmware update retries gets beyond a threshold (for example, 3 retries) then the filter driver should not attempt to update the firmware again, until a new version of the driver is downloaded from WU. The firmware update driver may use the registry to persist the retry states.

At the end of device firmware update, we recommended the device reset itself and re-enumerate.

Both methods of firmware update, the device function must be stopped before performing the firmware update. This ensures there are no open handle to the device and avoids any OS restart requirement.

Sample INF

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More Wireless Speakers To Choose From

Sonos Play:1 - Compact Wireless Smart Speaker - Black (Discontinued by manufacturer)

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The compact design fits just about any space. Put it on your kitchen countertop, or tuck it away on your office bookshelf.
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What to look for when buying a portable speaker

Different wireless speakers are designed for different needs. Stereo speakers can have both Left and Right stereo channels delivered in one speaker. Speakers meant for outdoor use have a tough casing to protect them from weather damage. Home theaters have specialized speakers that have wireless rear speakers and wired front speakers. Portable wireless speakers have different functionalities. You must define exactly what you want to achieve when buying wireless speakers. What are the essential features according to you? How do you plan on using the speaker? Where will you be using the speaker? Is it at home, living room, at your backyard, or out camping in the woods? Determining how you plan to use you your portable wireless speaker will help you choose the best one for you.

Top features of wireless speakers

Different portable speakers use different kinds of technology to function.Bluetooth technology Portable Bluetooth speakers have had significant improvements since their inception. Transmission distances are up to 50 feet, which is quite limited. These type of speakers are installed in many computers and mobile devices, and they do not require an internet connection to transmit. They are easy to use and offer fast connection. Bluetooth speakers are battery efficient. They have good sound quality.

NFC

Near Field Communication wireless protocol has minimal connection range. Devices need to be extremely close for transference to happen. Wi-Fi – Wi-Fi enabled wireless speakers allow very high-resolution audio transmission. They can offer more extended connection range, but since they are internet dependent, they cannot be placed very far from the router. Some wireless speakers are capable of connecting with Amazon’s Alexa or Google assistant.

Portability

Portable wireless speakers are available in a variety of sizes. Very small speakers might compromise on sound quality. Your portability needs depend on where you want to use the speakers. If you’re going to carry them at long distances, you will require more portable speakers.

Durability

Some wireless speakers have tough covers for weather resistance, while others are water resistant. Your preferences will depend on where you use your speakers. If you want to carry your speakers to your fishing ventures, you might need water-resistant speakers. Some speakers are fully submersible. Fortunately, most manufacturers have made durability a standard feature in portable speakers.

Style

Different brands of wireless speakers have different levels of aesthetic appeal. It’s always good to make sure that the speakers are appealing to your eyes.

Conclusion

Portable wireless speakers are speakers that receive audio signals using radio frequency waves as opposed to using audio cables. The most commonly used wireless technologies for audio transmission in wireless speakers is Wi-Fi and Bluetooth technology. Wireless Bluetooth speakers are very common in computers and mobile devices. This explains why wireless speakers and Bluetooth speakers are two terms often used interchangeably.
Wireless speakers are composed of two units: the main speaker unit and a radio frequency transmitter unit. The main speaker unit is comprised of the loudspeaker, an amplifier and a Radio Frequency receiver. The radio frequency transmitter unit is connected to the audio output of devices such as mp3 players, televisions, and computers, usually by the use of an RCA plug. The amplifier boosts the boosts the audio signal to the loudspeaker for better sound. The main speaker unit is generally powered by rechargeable batteries that may last for 4 to just over 20 hours when fully charged. Most rechargeable batteries are not replaceable, and their lifespan is the same as the lifespan of the speakers.
The listener can place the receiver where they want it to be. This gives the listener the freedom to change the position from where the sound is coming from without the need to use cables.Different wireless speakers have different signal frequency ranges. Many of them have the same signal frequency range as that used by cordless telephones, which is 900 MHz. The radio signal can pass through walls, floors, and ceilings. The speaker, therefore, can be placed in different rooms in the home and still transmit sound. Signals can be transmitted over a range of up to 300 feet with some speakers, but the range varies depending on the brand.
Speakers may have variable transmission channels (which are set using a turning knob) meant for overcoming potential RF interference from other wireless devices. Bluetooth speakers use a radio communication frequency so that the devices can be used without them being in the same visual line of sight. Portable wireless speakers have become very popular with consumers.
Portable wireless speakers have become very popular in recent times mainly because of the flexibility they offer. Their sound quality has improved due to improvements in technology. There is a wide variety of portable wireless speakers in the market, all with different features. You are always advised to check that the speaker’s features will achieve what you expect from them.