[Muscle] Lead Tide SIM card reader 882a (aka USB SIM card reader direct)

[Domen Puncer]

Hello!

I have this cheap SIM card reader that I'd like to make work.

lsusb (-v version below):
Bus 001 Device 002: ID 058f:9720 Alcor Micro Corp. 

Quick inspection reveals it's quite simple:
usb->serial chip (au9720) and what looks like a hex inverter.

In Linux it binds itself to pl2303 driver (ttyUSB0), and sometimes
to cdc_acm (ttyACM0). First one seems the right choice.

I sniffed Windows software, SIMEditor, and it looks like it sets
baudrate to 19200, then to 9600, and resets the card with DTS and RTS lines.
Afterwards card sends ATR, and looks like it can be interfaced with SIM
commands. Transfers are always byte by byte.
Some relevant data I captured:
http://www.coderock.org/tmp/sim-card-reader-atr.log

But here's the funny part: I can't get it to send me ATR, or anything.
Is there something obvious I'm missing?

Is there a similar (same even, since it's very simple hardware?) driver
already written?


	Domen

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lsusb -v:
Bus 001 Device 002: ID 058f:9720 Alcor Micro Corp. 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            2 Communications
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         8
  idVendor           0x058f Alcor Micro Corp.
  idProduct          0x9720 
  bcdDevice            0.00
  iManufacturer           0 
  iProduct                0 
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           67
    bNumInterfaces          2
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xa0
      (Bus Powered)
      Remote Wakeup
    MaxPower              500mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         2 Communications
      bInterfaceSubClass      2 Abstract (modem)
      bInterfaceProtocol      1 AT-commands (v.25ter)
      iInterface              0 
      CDC Header:
        bcdCDC               1.10
      CDC Call Management:
        bmCapabilities       0x01
          call management
        bDataInterface          1
      CDC ACM:
        bmCapabilities       0x06
          sends break
          line coding and serial state
      CDC Union:
        bMasterInterface        0
        bSlaveInterface         1 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0010  1x 16 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass        10 CDC Data
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 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     0x0040  1x 64 bytes
        bInterval               0
Device Status:     0x0000
  (Bus Powered)
----------