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42 lines
1.2 KiB
Markdown
42 lines
1.2 KiB
Markdown
CSR Support
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===========
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Introduction
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------------
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CSR is often called “driverless DFU” and is used only by BlueCore chips from
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Cambridge Silicon Radio (now owned by Qualcomm). The driverless just means that
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it's DFU like, and is routed over HID.
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CSR is a ODM that makes most of the Bluetooth audio chips in vendor hardware.
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The hardware vendor can enable or disable features on the CSR microcontroller
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depending on licensing options (for instance echo cancellation), and there’s
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even a little virtual machine to do simple vendor-specific things.
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All the CSR chips are updatable in-field, and most vendors issue updates to fix
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sound quality issues or to add support for new protocols or devices.
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Firmware Format
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---------------
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The daemon will decompress the cabinet archive and extract a firmware blob in
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DFU file format.
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This plugin supports the following protocol ID:
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* com.qualcomm.dfu
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GUID Generation
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---------------
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These devices use the standard USB DeviceInstanceId values, e.g.
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* `USB\VID_0A12&PID_1337&REV_2520`
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* `USB\VID_0A12&PID_1337`
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* `USB\VID_0A12`
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Vendor ID Security
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------------------
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The vendor ID is set from the USB vendor, in this instance set to `USB:0x0A12`
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