linux-kernel - Re: [PATCH v2] USB: serial: option: add Quectel EM05-G modem

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Message-ID: <YrF2LxpeUR5Sk1tR@hovoldconsulting.com>
Date:   Tue, 21 Jun 2022 09:41:35 +0200
From:   Johan Hovold <johan@...nel.org>
To:     Yonglin Tan <yonglin.tan@...look.com>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] USB: serial: option: add Quectel EM05-G modem

On Tue, Jun 21, 2022 at 10:31:52AM +0800, Yonglin Tan wrote:
> The EM05-G modem has 2 USB configurations that are configurable via the AT
> command AT+QCFG="usbnet",[ 0 | 2 ] which make the modem enumerate with
> the following interfaces, respectively:
> 
> "RMNET"	: AT + DIAG + NMEA + Modem + QMI
> "MBIM"	: MBIM + AT + DIAG + NMEA + Modem
> 
> The detailed description of the USB configuration for each mode as follows:
> 
> RMNET Mode
> --------------
> T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 21 Spd=480  MxCh= 0
> D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
> P:  Vendor=2c7c ProdID=030a Rev= 3.18
> S:  Manufacturer=Quectel
> S:  Product=Quectel EM05-G
> C:* #Ifs= 5 Cfg#= 1 Atr=a0 MxPwr=500mA
> 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#= 2 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#= 6 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
> E:  Ad=89(I) Atr=03(Int.) MxPS=   8 Ivl=32ms
> E:  Ad=88(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> 
> MBIM Mode
> --------------
> T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 16 Spd=480  MxCh= 0
> D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
> P:  Vendor=2c7c ProdID=030a Rev= 3.18
> S:  Manufacturer=Quectel
> S:  Product=Quectel EM05-G
> C:* #Ifs= 6 Cfg#= 1 Atr=a0 MxPwr=500mA
> A:  FirstIf#= 0 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#= 2 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#= 0 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#= 1 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim
> I:* If#= 1 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: Yonglin Tan <yonglin.tan@...look.com>
> ---
> V2:
>  1. Add the description of the usb interface configurations.
>  2. Add QMI Interface description.

Thanks for the update.

It looks like you missed my comment about moving the entry to where the
other Quectel entries with numerical PIDs are (sorted by PID) and moving
the comment to the first line of the entry.

> 
>  drivers/usb/serial/option.c | 2 ++
>  1 file changed, 2 insertions(+)
>  mode change 100644 => 100755 drivers/usb/serial/option.c

You also should not change the execute permission bits on this file.

> diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
> old mode 100644
> new mode 100755
> index ed1e50d..05fc322
> --- a/drivers/usb/serial/option.c
> +++ b/drivers/usb/serial/option.c
> @@ -1147,6 +1147,8 @@ static const struct usb_device_id option_ids[] = {
>  	  .driver_info = ZLP },
>  	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC200S_CN, 0xff, 0, 0) },
>  	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC200T, 0xff, 0, 0) },
> +	{ USB_DEVICE_INTERFACE_CLASS(QUECTEL_VENDOR_ID, 0x030a, 0xff),
> +	  .driver_info = RSVD(6) | ZLP }, /* EM05-G */
>  
>  	{ USB_DEVICE(CMOTECH_VENDOR_ID, CMOTECH_PRODUCT_6001) },
>  	{ USB_DEVICE(CMOTECH_VENDOR_ID, CMOTECH_PRODUCT_CMU_300) },

Could you fix that up in a v3?

Johan