From ae60aac59a9ad8ab64a4b07de509a534a75b6bac Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Tue, 21 Jun 2022 10:58:55 +0200
Subject: [PATCH] USB: serial: pl2303: add support for more HXN (G) types
Git-commit: ae60aac59a9ad8ab64a4b07de509a534a75b6bac
Patch-mainline: v5.19-rc4
References: git-fixes
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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/usb/serial/pl2303.c | 29 +++++++++++++++++------------
1 file changed, 17 insertions(+), 12 deletions(-)
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 3506c47e1eef..40b1ab3d284d 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -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;
}
--
2.35.3