linux-kernel - Re: [PATCH] USB: serial: option: add Quectel EM05CN modem

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Message-ID: <Y8AzHUc4R9M/mK2L@hovoldconsulting.com>
Date:   Thu, 12 Jan 2023 17:19:41 +0100
From:   Johan Hovold <johan@...nel.org>
To:     Duke Xin(辛安文) <duke_xinanwen@....com>
Cc:     gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, jerry.meng@...ctel.com,
        duke.xin@...ctel.com
Subject: Re: [PATCH] USB: serial: option: add Quectel EM05CN modem

On Tue, Dec 13, 2022 at 08:35:46PM -0800, Duke Xin(辛安文) wrote:
> Add support for the following Quectel EM05CN composition:
> 
> 0x0312: AT + MBIM + DIAG + NMEA + MODEM
> 
> usb-devices output:
> T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=480  MxCh= 0
> D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
> P:  Vendor=2c7c ProdID=0312 Rev= 3.18
> S:  Manufacturer=Quectel
> S:  Product=Quectel EM05-CN
> C:* #Ifs= 6 Cfg#= 1 Atr=a0 MxPwr=500mA
> A:  FirstIf#= 1 IfCount= 2 Cls=02(comm.) Sub=0e Prot=00
> I:* If#= 3 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
> E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> I:* If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
> E:  Ad=83(I) Atr=03(Int.) MxPS=  10 Ivl=32ms
> E:  Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> I:* If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
> E:  Ad=85(I) Atr=03(Int.) MxPS=  10 Ivl=32ms
> E:  Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> I:* If#= 5 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
> E:  Ad=87(I) Atr=03(Int.) MxPS=  10 Ivl=32ms
> E:  Ad=86(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> I:* If#= 1 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=0e Prot=00 Driver=cdc_mbim
> E:  Ad=89(I) Atr=03(Int.) MxPS=  64 Ivl=32ms
> I:  If#= 2 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim
> I:* If#= 2 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim
> E:  Ad=88(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> 
> Signed-off-by: Duke Xin(辛安文) <duke_xinanwen@....com>
> ---
>  drivers/usb/serial/option.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
> index dee79c7d82d5..a35842be0ca0 100644
> --- a/drivers/usb/serial/option.c
> +++ b/drivers/usb/serial/option.c
> @@ -256,6 +256,7 @@ static void option_instat_callback(struct urb *urb);
>  #define QUECTEL_PRODUCT_EM05G			0x030a
>  #define QUECTEL_PRODUCT_EM060K			0x030b
>  #define QUECTEL_PRODUCT_EM05G_SG		0x0311
> +#define QUECTEL_PRODUCT_EM05CN                0x0312

Please use tabs for indenting the values and make sure they line up with
the surrounding ones.

>  #define QUECTEL_PRODUCT_EM12			0x0512
>  #define QUECTEL_PRODUCT_RM500Q			0x0800
>  #define QUECTEL_PRODUCT_RM520N			0x0801
> @@ -1163,6 +1164,8 @@ static const struct usb_device_id option_ids[] = {
>  	  .driver_info = RSVD(6) | ZLP },
>  	{ USB_DEVICE_INTERFACE_CLASS(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EM05G_SG, 0xff),
>  	  .driver_info = RSVD(6) | ZLP },
> +	{ USB_DEVICE_INTERFACE_CLASS(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EM05CN, 0xff),
> +	  .driver_info = RSVD(6) | ZLP },

Based on the usb-devices output above you have no interface #6 so this
should not be needed, right?

>  	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EM060K, 0xff, 0x00, 0x40) },
>  	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EM060K, 0xff, 0xff, 0x30) },
>  	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EM060K, 0xff, 0xff, 0x40) },

Johan