On Fri, Jul 08, 2022 at 09:18:47AM +0000, nia wrote: > I'd like to know more about these drivers so I can write man pages > for them, so any input is welcome. > ~~~~~ ~~~~~ > sys/dev/usb/slurm.c > > This one caught my eye because it doesn't have the "u" prefix. > Log message, from jakllsch@ in 2013: > "Add slurm(4), a radio(4) driver for USB FM radio modules based > on the Silicon Labs reference design." > I can get a rough idea of the driver's capabilities by reading > the code. It seems much better than udsbr(4), the only USB > radio(4) driver we do document.
I'm somewhat of the belief that the 'u' prefix denotes a USB "class device" driver; and there's no USB class number or specification for these devices, and as such the 'u' prefix isn't strongly suggested. Plus, that reasoning allowed me to make a reference to pop culture. The hardware I developed against is an Instant FM Music, model RDX-155, from ADS Tech. I still have it around. A slurm(4) page should reference uaudio(4), as there's always/often no other way to get the audio signal out of the device.
