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    SubjectRE: [PATCH] USB: Mass Storage: Add MediaTek MT6276M device entry
    Hi Alan,

    As far as I know, many other devices used this init function in unusual_devs.h for their "ZeroCD" feature, and I think this is more convenient than let device user install utilities like usb_modeswitch and input command manually.


    Meng Zhang

    -----Original Message-----
    From: [] On Behalf Of Alan Stern
    Sent: Tuesday, February 28, 2012 11:31 PM
    To: Meng Zhang (张萌)
    Cc: Josua Dietze; Matthew Dharm; Phil Dibowitz; USB list; USB Storage list; Kernel development list
    Subject: Re: [PATCH] USB: Mass Storage: Add MediaTek MT6276M device entry

    On Tue, 28 Feb 2012, Meng Zhang wrote:

    > from: Meng Zhang <>
    > 1. Add entrys for mediatek MT6276M in unusual_devs.h
    > 2. Add init function for mediatek MT6276M to switch to COM port mode
    > 3. usb-devices outputs after running with this patch:
    > T: Bus=02 Lev=01 Prnt=01 Port=05 Cnt=01 Dev#= 48 Spd=480 MxCh= 0
    > D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
    > P: Vendor=0e8d ProdID=00a1 Rev=02.00
    > S: Manufacturer=MediaTek Inc
    > S: Product=Product
    > C: #Ifs= 3 Cfg#= 1 Atr=80 MxPwr=500mA
    > I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=02 Prot=01 Driver=option
    > I: If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
    > I: If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
    > 4. patch based on branch:
    > git://
    > Signed-off-by: Meng Zhang <>

    Nowadays, aren't such things handled in userspace by the usb_modeswitch program rather than in the kernel driver?

    Alan Stern

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