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Date:   Fri, 20 Nov 2020 10:28:28 +0100
From:   vpalatin@...omium.org
To:     Johan Hovold <johan@...nel.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Vincent Palatin <vpalatin@...omium.org>
Subject: [PATCH v2] usb: serial: option: add Fibocom NL668 variants

From: Vincent Palatin <vpalatin@...omium.org>

Update the USB serial option driver support for the Fibocom NL668 Cat.4
LTE modules as there are actually several different variants.
Got clarifications from Fibocom, there are distinct products:
- VID:PID 1508:1001, NL668 for IOT (no MBIM interface)
- VID:PID 2cb7:01a0, NL668-AM and NL652-EU are laptop M.2 cards (with
  MBIM interfaces for Windows/Linux/Chrome OS), respectively for Americas
  and Europe.

usb-devices output for the laptop M.2 cards:
T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  4 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=ef(misc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=2cb7 ProdID=01a0 Rev=03.18
S:  Manufacturer=Fibocom Wireless Inc.
S:  Product=Fibocom NL652-EU Modem
S:  SerialNumber=0123456789ABCDEF
C:  #Ifs= 5 Cfg#= 1 Atr=a0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=02(commc) Sub=0e Prot=00 Driver=cdc_mbim
I:  If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim
I:  If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)
I:  If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)
I:  If#= 4 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)

Signed-off-by: Vincent Palatin <vpalatin@...omium.org>
---
 drivers/usb/serial/option.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index c773db129bf9..1dfde90765fd 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -2036,12 +2036,13 @@ static const struct usb_device_id option_ids[] = {
 	  .driver_info = RSVD(0) | RSVD(1) | RSVD(6) },
 	{ USB_DEVICE(0x0489, 0xe0b5),						/* Foxconn T77W968 ESIM */
 	  .driver_info = RSVD(0) | RSVD(1) | RSVD(6) },
-	{ USB_DEVICE(0x1508, 0x1001),						/* Fibocom NL668 */
+	{ USB_DEVICE(0x1508, 0x1001),						/* Fibocom NL668 (IOT version) */
 	  .driver_info = RSVD(4) | RSVD(5) | RSVD(6) },
 	{ USB_DEVICE(0x2cb7, 0x0104),						/* Fibocom NL678 series */
 	  .driver_info = RSVD(4) | RSVD(5) },
 	{ USB_DEVICE_INTERFACE_CLASS(0x2cb7, 0x0105, 0xff),			/* Fibocom NL678 series */
 	  .driver_info = RSVD(6) },
+	{ USB_DEVICE_INTERFACE_CLASS(0x2cb7, 0x01a0, 0xff) },			/* Fibocom NL668-AM/NL652-EU (laptop MBIM) */
 	{ USB_DEVICE_INTERFACE_CLASS(0x305a, 0x1404, 0xff) },			/* GosunCn GM500 RNDIS */
 	{ USB_DEVICE_INTERFACE_CLASS(0x305a, 0x1405, 0xff) },			/* GosunCn GM500 MBIM */
 	{ USB_DEVICE_INTERFACE_CLASS(0x305a, 0x1406, 0xff) },			/* GosunCn GM500 ECM/NCM */
-- 
2.29.2.454.gaff20da3a2-goog

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