UDEV : ASUS Laptop G73S MultiCard Reader

UDEV : ASUS Laptop G73S MultiCard Reader

[Postmaster]

my laptop comes with an internal Realtek card reader ( vendor=0x0bda, 
product=0x0139 )

It is not recognized by udevd.

The bInterface class is 255, which I think is wrong ( should be 8 for 
mass storage device, i think )

Right now the kern does not assign this device to usb-storage.
The realtek driver is nice, but the product id of 0x0138 does not match 
this productid 0f 0x0139.

How are the udev hooks supposed to work to rename the bInterface class 
from vendor specific to mass storage/realtek driver?



============LSUSB -v =================

Bus 001 Device 004: ID 0bda:0139 Realtek Semiconductor Corp. USB 2.0 
multicard reader
Device Descriptor:
   bLength                18
   bDescriptorType         1
   bcdUSB               2.00
   bDeviceClass          255 Vendor Specific Class
   bDeviceSubClass       255 Vendor Specific Subclass
   bDeviceProtocol       255 Vendor Specific Protocol
   bMaxPacketSize0        64
   idVendor           0x0bda Realtek Semiconductor Corp.
   idProduct          0x0139 USB 2.0 multicard reader
   bcdDevice           39.60
   iManufacturer           1 Generic
   iProduct                2 USB2.0-CRW
   iSerial                 3 20100201396000000
   bNumConfigurations      1
   Configuration Descriptor:
     bLength                 9
     bDescriptorType         2
     wTotalLength           39
     bNumInterfaces          1
     bConfigurationValue     1
     iConfiguration          4 CARD READER
     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      6
       bInterfaceProtocol     80
       iInterface              5 Bulk-In, Bulk-Out, Interface
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x01  EP 1 OUT
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0200  1x 512 bytes
         bInterval               0
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x82  EP 2 IN
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0200  1x 512 bytes
         bInterval               0
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x83  EP 3 IN
         bmAttributes            3
           Transfer Type            Interrupt
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0003  1x 3 bytes
         bInterval              10
Device Qualifier (for other device speed):
   bLength                10
   bDescriptorType         6
   bcdUSB               2.00
   bDeviceClass            0 (Defined at Interface level)
   bDeviceSubClass         0
   bDeviceProtocol         0
   bMaxPacketSize0        64
   bNumConfigurations      1
Device Status:     0x0000
   (Bus Powered)

[root@Asus gat]#

Re: UDEV : ASUS Laptop G73S MultiCard Reader

[Greg KH]

On Sat, Jul 16, 2011 at 08:00:55AM -0400, Postmaster wrote:
> my laptop comes with an internal Realtek card reader (
> vendor=0x0bda, product=0x0139 )
> 
> It is not recognized by udevd.
> 
> The bInterface class is 255, which I think is wrong ( should be 8
> for mass storage device, i think )

If so, that's the device problem, nothing you can do from the kernel, or
from udev, to change that.  See the USB spec for details.

> Right now the kern does not assign this device to usb-storage.
> The realtek driver is nice, but the product id of 0x0138 does not
> match this productid 0f 0x0139.

That is because this is a different device, and it says it is a
vendor-specific protocol, which will not work with the usb-storage
driver, sorry.

greg k-h

Re: UDEV : ASUS Laptop G73S MultiCard Reader

[Postmaster]

> That is because this is a different device, and it says it is a
> vendor-specific protocol, which will not work with the usb-storage
> driver, sorry.

I Disagree with most of what u suggest.

Who knows what vendor specific means. And you really wont know until you 
try. Which is why there are tables to handle Unusual Devices.

At this time there is a realtek driver in the latest kern code. I would 
like to load up this driver when usb-core detects this device.

Right now, I have not found the udev rule for loading up usb-storage.	

So where are the udev system specs


BTW: is there a way to disable, and enable the device? Since this usb 
device is internal, if I have too many "printk" or DBG messages at 
boot-up time, it tends to overflow the rsyslogd daemon.

btw#2 where is this forum? All one sees in the written docs is to email 
questions, rather than post questions to a forum.

Re: UDEV : ASUS Laptop G73S MultiCard Reader

[Greg KH]

On Sun, Jul 17, 2011 at 11:50:31AM -0400, Postmaster wrote:
> 
> >That is because this is a different device, and it says it is a
> >vendor-specific protocol, which will not work with the usb-storage
> >driver, sorry.
> 
> I Disagree with most of what u suggest.

I'm sorry to hear that.

> Who knows what vendor specific means. And you really wont know until
> you try. Which is why there are tables to handle Unusual Devices.

If a vendor says it is not a mass-storage device, why do you think they
are lying?  And the term, "vendor specific" has a very specific
definition, see the USB specification if you are curious as to what it
is.

> At this time there is a realtek driver in the latest kern code. I
> would like to load up this driver when usb-core detects this device.
> 
> Right now, I have not found the udev rule for loading up usb-storage.	

There is no such rule, the usb device id causes it to happen through
modprobe of the module alias of the device.

> So where are the udev system specs

This is not something that udev does at all, sorry.

> BTW: is there a way to disable, and enable the device? Since this
> usb device is internal, if I have too many "printk" or DBG messages
> at boot-up time, it tends to overflow the rsyslogd daemon.
> 
> btw#2 where is this forum? All one sees in the written docs is to
> email questions, rather than post questions to a forum.

Yes, this is done through email, not a web forum.

greg k-h