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70 lines
1.3 KiB
Markdown
70 lines
1.3 KiB
Markdown
# Conexant Audio
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## Introduction
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This plugin is used to update a small subset of Conexant (now owned by Synaptics)
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audio devices.
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## Firmware Format
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The daemon will decompress the cabinet archive and extract a firmware blob in
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a modified SREC file format.
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This plugin supports the following protocol ID:
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* com.synaptics.synaptics-cxaudio
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## GUID Generation
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These devices use the standard USB DeviceInstanceId values, e.g.
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* `USB\VID_17EF&PID_3083&REV_0001`
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* `USB\VID_17EF&PID_3083`
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* `USB\VID_17EF`
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These devices also use custom GUID values, e.g.
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* `SYNAPTICS_CXAUDIO\CX2198X`
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* `SYNAPTICS_CXAUDIO\CX21985`
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## Update Behavior
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The firmware is deployed when the device is in normal runtime mode, and the
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device will reset when the new firmware has been written.
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## Vendor ID Security
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The vendor ID is set from the USB vendor, in this instance set to `USB:0x17EF`
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## Quirk Use
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This plugin uses the following plugin-specific quirks:
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### CxaudioChipIdBase
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Base integer for ChipID.
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Since: 1.3.2
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### CxaudioSoftwareReset
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If the chip supports self-reset.
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Since: 1.3.2
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### CxaudioPatch1ValidAddr
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Address of patch location #1.
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Since: 1.3.2
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### CxaudioPatch2ValidAddr
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Address of patch location #2.
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Since: 1.3.2
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## External Interface Access
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This plugin requires read/write access to `/dev/bus/usb`.
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