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USB: serial: pl2303: add support for more HXN (G) types

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Add support for further HXN (G) type devices (GT variant, GL variant, GS
variant and GR) and document the bcdDevice mapping.

Note that the TA and TB types use the same bcdDevice as some GT and GE
variants, respectively, but that the HX status request can be used to
determine which is which.

Also note that we currently do not distinguish between the various HXN
(G) types in the driver but that this may change eventually (e.g. when
adding GPIO support).

Reported-by: Charles Yeh <charlesyeh522@gmail.com>
Link: https://lore.kernel.org/r/YrF77b9DdeumUAee@hovoldconsulting.com
Cc: stable@vger.kernel.org	# 5.13
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
This commit is contained in:
Johan Hovold 2022-06-21 10:58:55 +02:00
parent 342fc0c3b3
commit ae60aac59a
1 changed files with 17 additions and 12 deletions
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29
drivers/usb/serial/pl2303.c
View File

@ -436,22 +436,27 @@ static int pl2303_detect_type(struct usb_serial *serial)
break;
case 0x200:
switch (bcdDevice) {
case 0x100:
case 0x100: /* GC */
case 0x105:
return TYPE_HXN;
case 0x300: /* GT / TA */
if (pl2303_supports_hx_status(serial))
return TYPE_TA;
fallthrough;
case 0x305:
case 0x400: /* GL */
case 0x405:
return TYPE_HXN;
case 0x500: /* GE / TB */
if (pl2303_supports_hx_status(serial))
return TYPE_TB;
fallthrough;
case 0x505:
case 0x600: /* GS */
case 0x605:
/*
* Assume it's an HXN-type if the device doesn't
* support the old read request value.
*/
if (!pl2303_supports_hx_status(serial))
return TYPE_HXN;
break;
case 0x300:
return TYPE_TA;
case 0x500:
return TYPE_TB;
case 0x700: /* GR */
case 0x705:
return TYPE_HXN;
}
break;
}