On Sun, 2016-07-24 at 12:52 -0600, Warner Losh wrote:
> On Sun, Jul 24, 2016 at 12:42 PM, Kevin Oberman <rkober...@gmail.com>
> wrote:
> > There are several different USB serial drivers. Off-hand I see
> > ubser, ubsa,
> > uchcom, ucom, ucycom, uftdi, ubgensa, umcs, umct, umoscom, uplcom,
> > usb_serial, uslcom, and uvscom. Whether any of these will support
> > the TI
> > chip, I can't say. Most have man pages, but a few, as has been
> > noted, are
> > lacking one.
> 
> I tried to automate discovery of these things. However, the only way
> you can really know for sure about the TI chip is to read it's
> datasheet
> and compare that with extant drivers. It's actually easier than it
> sounds.
> 
> I've often thought of unification of the TTY USB drivers, since they
> are
> most (but not all) based on the standard plus extra bits.
> 
> Warner

To reiterate:  we do not have a driver for TI 5052 chips.

It's not much like other usb-serial chips.  In fact it's not strictly a
usb-serial chip, it's a multifunction chip that includes a software
-controllable usb hub, 2 serial ports, gpio, an i2c bus master, an MCU
interface, a multichannel DMA controller, and apparently even has the
ability to download your own 8052-compatible microcontroller code into
the 5052 and have it take over from the built-in rom code.

It would be reasonable enough to write a driver that initially
supported only the uart part of the chip.

-- Ian

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