linux-kernel - Re: option driver, ZTE MF_330 matches linux usb 2.0 root hub

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Message-ID: <alpine.LRH.2.00.1106081531340.8510@twin.jikos.cz>
Date:	Wed, 8 Jun 2011 15:32:29 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Michael Tokarev <mjt@....msk.ru>
Cc:	Paweł Drobek <pawel.drobek@...il.com>,
	Greg KH <greg@...ah.com>,
	Linux USB list <linux-usb@...r.kernel.org>,
	Linux-kernel <linux-kernel@...r.kernel.org>,
	Dominik Brodowski <linux@...inikbrodowski.net>
Subject: Re: option driver, ZTE MF_330 matches linux usb 2.0 root hub

On Tue, 7 Jun 2011, Michael Tokarev wrote:

> > Bus 003 Device 002: ID 19d2:0001 ONDA Communication S.p.A.
> > Device Descriptor:
> >   bLength                18
> >   bDescriptorType         1
> >   bcdUSB               1.10
> >   bDeviceClass            0 (Defined at Interface level)
> >   bDeviceSubClass         0
> >   bDeviceProtocol         0
> >   bMaxPacketSize0        64
> >   idVendor           0x19d2 ONDA Communication S.p.A.
> >   idProduct          0x0001
> >   bcdDevice            0.00
> >   iManufacturer           1 Qualcomm, Incorporated
> >   iProduct                2 ZTE CDMA Technologies MSM
> >   iSerial                 0
> >   bNumConfigurations      1
> >   Configuration Descriptor:
> >     bLength                 9
> >     bDescriptorType         2
> >     wTotalLength           85
> >     bNumInterfaces          3
> >     bConfigurationValue     1
> >     iConfiguration          0
> >     bmAttributes         0xa0
> >       (Bus Powered)
> >       Remote Wakeup
> >     MaxPower              500mA
> >     Interface Descriptor:
> >       bLength                 9
> >       bDescriptorType         4
> >       bInterfaceNumber        0
> >       bAlternateSetting       0
> >       bNumEndpoints           3
> >       bInterfaceClass       255 Vendor Specific Class
> >       bInterfaceSubClass    255 Vendor Specific Subclass
> >       bInterfaceProtocol    255 Vendor Specific Protocol
> >       iInterface              3 Data Interface
> 
> So, as far as I can see, this is covered by
> 
> #define ZTE_VENDOR_ID                           0x19d2
> #define ZTE_PRODUCT_MF622                       0x0001
> 
> { USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, ZTE_PRODUCT_MF622, 0xff, 0xff, 0xff) }, /* ZTE WCDMA products */
> 
> and it should Just Work aftere reverting a559d2c8c1bf652ea2d0ecd6ab4a250fcdb37db8
> "USB: option: add ID for ZTE MF 330".  But I'm not sure this really
> is MF330, since the device ID says it's MF622.
> 
> Are we talking about the same device?
> 
> Besides, why in linux it's identified as ZTE, while
> lsusb lists it as "ONDA Comm." ?

ONDA and ZTE are usually the very same chip.

Also please note that USB ID of these devices usually changes after 
'usb_modeswtich' triggers in userspace (and many distros ship udev rule 
for this as a default nowadays), which might contribute to the overall 
confusion a little bit more.

-- 
Jiri Kosina
SUSE Labs

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