USB: serial: option: add Fibocom NL668 series

[Johan Hovold <johan@kernel.org>]

On Tue, Dec 11, 2018 at 08:41:24AM +0100, Jörgen Storvist wrote:
> 
> Added USB serial option driver support for Fibocom NL668 series cellular modules.
> Reserved USB endpoints 4, 5 and 6 for network + ADB interface.
> 
> Signed-off-by: Jörgen Storvist <jorgen.storvist@gmail.com>
> ---
> 
> Thanks for feedback!
> Changes:
> Removed name declarations for VID/PID
> Added reserved endpoint for ADB interface
>
> usb-devices
> T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  7 Spd=480 MxCh= 0
> D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
> P:  Vendor=1508 ProdID=1001 Rev=03.18
> S:  Manufacturer=Nodecom NL668 Modem
> S:  Product=Nodecom NL668-CN Modem
> S:  SerialNumber=5ced6a52
> C:  #Ifs= 7 Cfg#= 1 Atr=a0 MxPwr=500mA
> I:  If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
> I:  If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
> I:  If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
> I:  If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
> I:  If#= 4 Alt= 0 #EPs= 1 Cls=02(commc) Sub=06 Prot=00 Driver=cdc_ether
> I:  If#= 5 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether
> I:  If#= 6 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=42 Prot=01 Driver=(none)

Thanks for the update and usb-devices info (you can even put this in the
changelog).

>  drivers/usb/serial/option.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
> index e24ff16..ca3e398 100644
> --- a/drivers/usb/serial/option.c
> +++ b/drivers/usb/serial/option.c
> @@ -1941,6 +1941,8 @@ static const struct usb_device_id option_ids[] = {
>  	{ USB_DEVICE_AND_INTERFACE_INFO(WETELECOM_VENDOR_ID, WETELECOM_PRODUCT_6802, 0xff, 0xff, 0xff) },
>  	{ USB_DEVICE_AND_INTERFACE_INFO(WETELECOM_VENDOR_ID, WETELECOM_PRODUCT_WMD300, 0xff, 0xff, 0xff) },
>  	{ USB_DEVICE_AND_INTERFACE_INFO(0x03f0, 0x421d, 0xff, 0xff, 0xff) }, /* HP lt2523 (Novatel E371) */
> +	{ USB_DEVICE(0x1508, 0x1001), /* Fibocom NL668 series */
> +	  .driver_info = RSVD(4) | RSVD(5) | RSVD(6) },

Looks like you can use USB_DEVICE_INTERFACE_CLASS() to match on the
vendor class instead of blacklisting interface 4 and 5.

A more specific match is generally preferred over blacklisting (which
adds some overhead).

Care to address that in a v3? Remember to include the patch revision in
the subject line as well (e.g. "[PATCH v3] USB: ...").

Thanks,
Johan